1 // SPDX-License-Identifier: GPL-1.0+
3 * $Id: synclink.c,v 4.38 2005/11/07 16:30:34 paulkf Exp $
5 * Device driver for Microgate SyncLink ISA and PCI
6 * high speed multiprotocol serial adapters.
8 * written by Paul Fulghum for Microgate Corporation
11 * Microgate and SyncLink are trademarks of Microgate Corporation
13 * Derived from serial.c written by Theodore Ts'o and Linus Torvalds
15 * Original release 01/11/99
17 * This code is released under the GNU General Public License (GPL)
19 * This driver is primarily intended for use in synchronous
20 * HDLC mode. Asynchronous mode is also provided.
22 * When operating in synchronous mode, each call to mgsl_write()
23 * contains exactly one complete HDLC frame. Calling mgsl_put_char
24 * will start assembling an HDLC frame that will not be sent until
25 * mgsl_flush_chars or mgsl_write is called.
27 * Synchronous receive data is reported as complete frames. To accomplish
28 * this, the TTY flip buffer is bypassed (too small to hold largest
29 * frame and may fragment frames) and the line discipline
30 * receive entry point is called directly.
32 * This driver has been tested with a slightly modified ppp.c driver
33 * for synchronous PPP.
36 * Added interface for syncppp.c driver (an alternate synchronous PPP
37 * implementation that also supports Cisco HDLC). Each device instance
38 * registers as a tty device AND a network device (if dosyncppp option
39 * is set for the device). The functionality is determined by which
40 * device interface is opened.
42 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
43 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
44 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
45 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
46 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
47 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
48 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
49 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
50 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
51 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
52 * OF THE POSSIBILITY OF SUCH DAMAGE.
56 # define BREAKPOINT() asm(" int $3");
58 # define BREAKPOINT() { }
61 #define MAX_ISA_DEVICES 10
62 #define MAX_PCI_DEVICES 10
63 #define MAX_TOTAL_DEVICES 20
65 #include <linux/module.h>
66 #include <linux/errno.h>
67 #include <linux/signal.h>
68 #include <linux/sched.h>
69 #include <linux/timer.h>
70 #include <linux/interrupt.h>
71 #include <linux/pci.h>
72 #include <linux/tty.h>
73 #include <linux/tty_flip.h>
74 #include <linux/serial.h>
75 #include <linux/major.h>
76 #include <linux/string.h>
77 #include <linux/fcntl.h>
78 #include <linux/ptrace.h>
79 #include <linux/ioport.h>
81 #include <linux/seq_file.h>
82 #include <linux/slab.h>
83 #include <linux/delay.h>
84 #include <linux/netdevice.h>
85 #include <linux/vmalloc.h>
86 #include <linux/init.h>
87 #include <linux/ioctl.h>
88 #include <linux/synclink.h>
93 #include <linux/bitops.h>
94 #include <asm/types.h>
95 #include <linux/termios.h>
96 #include <linux/workqueue.h>
97 #include <linux/hdlc.h>
98 #include <linux/dma-mapping.h>
100 #if defined(CONFIG_HDLC) || (defined(CONFIG_HDLC_MODULE) && defined(CONFIG_SYNCLINK_MODULE))
101 #define SYNCLINK_GENERIC_HDLC 1
103 #define SYNCLINK_GENERIC_HDLC 0
106 #define GET_USER(error,value,addr) error = get_user(value,addr)
107 #define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0
108 #define PUT_USER(error,value,addr) error = put_user(value,addr)
109 #define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0
111 #include <linux/uaccess.h>
113 #define RCLRVALUE 0xffff
115 static MGSL_PARAMS default_params = {
116 MGSL_MODE_HDLC, /* unsigned long mode */
117 0, /* unsigned char loopback; */
118 HDLC_FLAG_UNDERRUN_ABORT15, /* unsigned short flags; */
119 HDLC_ENCODING_NRZI_SPACE, /* unsigned char encoding; */
120 0, /* unsigned long clock_speed; */
121 0xff, /* unsigned char addr_filter; */
122 HDLC_CRC_16_CCITT, /* unsigned short crc_type; */
123 HDLC_PREAMBLE_LENGTH_8BITS, /* unsigned char preamble_length; */
124 HDLC_PREAMBLE_PATTERN_NONE, /* unsigned char preamble; */
125 9600, /* unsigned long data_rate; */
126 8, /* unsigned char data_bits; */
127 1, /* unsigned char stop_bits; */
128 ASYNC_PARITY_NONE /* unsigned char parity; */
131 #define SHARED_MEM_ADDRESS_SIZE 0x40000
132 #define BUFFERLISTSIZE 4096
133 #define DMABUFFERSIZE 4096
134 #define MAXRXFRAMES 7
136 typedef struct _DMABUFFERENTRY
138 u32 phys_addr; /* 32-bit flat physical address of data buffer */
139 volatile u16 count; /* buffer size/data count */
140 volatile u16 status; /* Control/status field */
141 volatile u16 rcc; /* character count field */
142 u16 reserved; /* padding required by 16C32 */
143 u32 link; /* 32-bit flat link to next buffer entry */
144 char *virt_addr; /* virtual address of data buffer */
145 u32 phys_entry; /* physical address of this buffer entry */
147 } DMABUFFERENTRY, *DMAPBUFFERENTRY;
149 /* The queue of BH actions to be performed */
152 #define BH_TRANSMIT 2
155 #define IO_PIN_SHUTDOWN_LIMIT 100
157 struct _input_signal_events {
168 /* transmit holding buffer definitions*/
169 #define MAX_TX_HOLDING_BUFFERS 5
170 struct tx_holding_buffer {
172 unsigned char * buffer;
177 * Device instance data structure
182 struct tty_port port;
186 struct mgsl_icount icount;
189 int x_char; /* xon/xoff character */
190 u16 read_status_mask;
191 u16 ignore_status_mask;
192 unsigned char *xmit_buf;
197 wait_queue_head_t status_event_wait_q;
198 wait_queue_head_t event_wait_q;
199 struct timer_list tx_timer; /* HDLC transmit timeout timer */
200 struct mgsl_struct *next_device; /* device list link */
202 spinlock_t irq_spinlock; /* spinlock for synchronizing with ISR */
203 struct work_struct task; /* task structure for scheduling bh */
205 u32 EventMask; /* event trigger mask */
206 u32 RecordedEvents; /* pending events */
208 u32 max_frame_size; /* as set by device config */
212 bool bh_running; /* Protection from multiple */
216 int dcd_chkcount; /* check counts to prevent */
217 int cts_chkcount; /* too many IRQs if a signal */
218 int dsr_chkcount; /* is floating */
221 char *buffer_list; /* virtual address of Rx & Tx buffer lists */
222 u32 buffer_list_phys;
223 dma_addr_t buffer_list_dma_addr;
225 unsigned int rx_buffer_count; /* count of total allocated Rx buffers */
226 DMABUFFERENTRY *rx_buffer_list; /* list of receive buffer entries */
227 unsigned int current_rx_buffer;
229 int num_tx_dma_buffers; /* number of tx dma frames required */
230 int tx_dma_buffers_used;
231 unsigned int tx_buffer_count; /* count of total allocated Tx buffers */
232 DMABUFFERENTRY *tx_buffer_list; /* list of transmit buffer entries */
233 int start_tx_dma_buffer; /* tx dma buffer to start tx dma operation */
234 int current_tx_buffer; /* next tx dma buffer to be loaded */
236 unsigned char *intermediate_rxbuffer;
238 int num_tx_holding_buffers; /* number of tx holding buffer allocated */
239 int get_tx_holding_index; /* next tx holding buffer for adapter to load */
240 int put_tx_holding_index; /* next tx holding buffer to store user request */
241 int tx_holding_count; /* number of tx holding buffers waiting */
242 struct tx_holding_buffer tx_holding_buffers[MAX_TX_HOLDING_BUFFERS];
246 bool rx_rcc_underrun;
255 char device_name[25]; /* device instance name */
257 unsigned int bus_type; /* expansion bus type (ISA,EISA,PCI) */
258 unsigned char bus; /* expansion bus number (zero based) */
259 unsigned char function; /* PCI device number */
261 unsigned int io_base; /* base I/O address of adapter */
262 unsigned int io_addr_size; /* size of the I/O address range */
263 bool io_addr_requested; /* true if I/O address requested */
265 unsigned int irq_level; /* interrupt level */
266 unsigned long irq_flags;
267 bool irq_requested; /* true if IRQ requested */
269 unsigned int dma_level; /* DMA channel */
270 bool dma_requested; /* true if dma channel requested */
276 MGSL_PARAMS params; /* communications parameters */
278 unsigned char serial_signals; /* current serial signal states */
280 bool irq_occurred; /* for diagnostics use */
281 unsigned int init_error; /* Initialization startup error (DIAGS) */
282 int fDiagnosticsmode; /* Driver in Diagnostic mode? (DIAGS) */
285 unsigned char* memory_base; /* shared memory address (PCI only) */
286 u32 phys_memory_base;
287 bool shared_mem_requested;
289 unsigned char* lcr_base; /* local config registers (PCI only) */
292 bool lcr_mem_requested;
296 bool drop_rts_on_tx_done;
298 bool loopmode_insert_requested;
299 bool loopmode_send_done_requested;
301 struct _input_signal_events input_signal_events;
303 /* generic HDLC device parts */
307 #if SYNCLINK_GENERIC_HDLC
308 struct net_device *netdev;
312 #define MGSL_MAGIC 0x5401
315 * The size of the serial xmit buffer is 1 page, or 4096 bytes
317 #ifndef SERIAL_XMIT_SIZE
318 #define SERIAL_XMIT_SIZE 4096
322 * These macros define the offsets used in calculating the
323 * I/O address of the specified USC registers.
327 #define DCPIN 2 /* Bit 1 of I/O address */
328 #define SDPIN 4 /* Bit 2 of I/O address */
330 #define DCAR 0 /* DMA command/address register */
331 #define CCAR SDPIN /* channel command/address register */
332 #define DATAREG DCPIN + SDPIN /* serial data register */
337 * These macros define the register address (ordinal number)
338 * used for writing address/value pairs to the USC.
341 #define CMR 0x02 /* Channel mode Register */
342 #define CCSR 0x04 /* Channel Command/status Register */
343 #define CCR 0x06 /* Channel Control Register */
344 #define PSR 0x08 /* Port status Register */
345 #define PCR 0x0a /* Port Control Register */
346 #define TMDR 0x0c /* Test mode Data Register */
347 #define TMCR 0x0e /* Test mode Control Register */
348 #define CMCR 0x10 /* Clock mode Control Register */
349 #define HCR 0x12 /* Hardware Configuration Register */
350 #define IVR 0x14 /* Interrupt Vector Register */
351 #define IOCR 0x16 /* Input/Output Control Register */
352 #define ICR 0x18 /* Interrupt Control Register */
353 #define DCCR 0x1a /* Daisy Chain Control Register */
354 #define MISR 0x1c /* Misc Interrupt status Register */
355 #define SICR 0x1e /* status Interrupt Control Register */
356 #define RDR 0x20 /* Receive Data Register */
357 #define RMR 0x22 /* Receive mode Register */
358 #define RCSR 0x24 /* Receive Command/status Register */
359 #define RICR 0x26 /* Receive Interrupt Control Register */
360 #define RSR 0x28 /* Receive Sync Register */
361 #define RCLR 0x2a /* Receive count Limit Register */
362 #define RCCR 0x2c /* Receive Character count Register */
363 #define TC0R 0x2e /* Time Constant 0 Register */
364 #define TDR 0x30 /* Transmit Data Register */
365 #define TMR 0x32 /* Transmit mode Register */
366 #define TCSR 0x34 /* Transmit Command/status Register */
367 #define TICR 0x36 /* Transmit Interrupt Control Register */
368 #define TSR 0x38 /* Transmit Sync Register */
369 #define TCLR 0x3a /* Transmit count Limit Register */
370 #define TCCR 0x3c /* Transmit Character count Register */
371 #define TC1R 0x3e /* Time Constant 1 Register */
375 * MACRO DEFINITIONS FOR DMA REGISTERS
378 #define DCR 0x06 /* DMA Control Register (shared) */
379 #define DACR 0x08 /* DMA Array count Register (shared) */
380 #define BDCR 0x12 /* Burst/Dwell Control Register (shared) */
381 #define DIVR 0x14 /* DMA Interrupt Vector Register (shared) */
382 #define DICR 0x18 /* DMA Interrupt Control Register (shared) */
383 #define CDIR 0x1a /* Clear DMA Interrupt Register (shared) */
384 #define SDIR 0x1c /* Set DMA Interrupt Register (shared) */
386 #define TDMR 0x02 /* Transmit DMA mode Register */
387 #define TDIAR 0x1e /* Transmit DMA Interrupt Arm Register */
388 #define TBCR 0x2a /* Transmit Byte count Register */
389 #define TARL 0x2c /* Transmit Address Register (low) */
390 #define TARU 0x2e /* Transmit Address Register (high) */
391 #define NTBCR 0x3a /* Next Transmit Byte count Register */
392 #define NTARL 0x3c /* Next Transmit Address Register (low) */
393 #define NTARU 0x3e /* Next Transmit Address Register (high) */
395 #define RDMR 0x82 /* Receive DMA mode Register (non-shared) */
396 #define RDIAR 0x9e /* Receive DMA Interrupt Arm Register */
397 #define RBCR 0xaa /* Receive Byte count Register */
398 #define RARL 0xac /* Receive Address Register (low) */
399 #define RARU 0xae /* Receive Address Register (high) */
400 #define NRBCR 0xba /* Next Receive Byte count Register */
401 #define NRARL 0xbc /* Next Receive Address Register (low) */
402 #define NRARU 0xbe /* Next Receive Address Register (high) */
406 * MACRO DEFINITIONS FOR MODEM STATUS BITS
409 #define MODEMSTATUS_DTR 0x80
410 #define MODEMSTATUS_DSR 0x40
411 #define MODEMSTATUS_RTS 0x20
412 #define MODEMSTATUS_CTS 0x10
413 #define MODEMSTATUS_RI 0x04
414 #define MODEMSTATUS_DCD 0x01
418 * Channel Command/Address Register (CCAR) Command Codes
421 #define RTCmd_Null 0x0000
422 #define RTCmd_ResetHighestIus 0x1000
423 #define RTCmd_TriggerChannelLoadDma 0x2000
424 #define RTCmd_TriggerRxDma 0x2800
425 #define RTCmd_TriggerTxDma 0x3000
426 #define RTCmd_TriggerRxAndTxDma 0x3800
427 #define RTCmd_PurgeRxFifo 0x4800
428 #define RTCmd_PurgeTxFifo 0x5000
429 #define RTCmd_PurgeRxAndTxFifo 0x5800
430 #define RTCmd_LoadRcc 0x6800
431 #define RTCmd_LoadTcc 0x7000
432 #define RTCmd_LoadRccAndTcc 0x7800
433 #define RTCmd_LoadTC0 0x8800
434 #define RTCmd_LoadTC1 0x9000
435 #define RTCmd_LoadTC0AndTC1 0x9800
436 #define RTCmd_SerialDataLSBFirst 0xa000
437 #define RTCmd_SerialDataMSBFirst 0xa800
438 #define RTCmd_SelectBigEndian 0xb000
439 #define RTCmd_SelectLittleEndian 0xb800
443 * DMA Command/Address Register (DCAR) Command Codes
446 #define DmaCmd_Null 0x0000
447 #define DmaCmd_ResetTxChannel 0x1000
448 #define DmaCmd_ResetRxChannel 0x1200
449 #define DmaCmd_StartTxChannel 0x2000
450 #define DmaCmd_StartRxChannel 0x2200
451 #define DmaCmd_ContinueTxChannel 0x3000
452 #define DmaCmd_ContinueRxChannel 0x3200
453 #define DmaCmd_PauseTxChannel 0x4000
454 #define DmaCmd_PauseRxChannel 0x4200
455 #define DmaCmd_AbortTxChannel 0x5000
456 #define DmaCmd_AbortRxChannel 0x5200
457 #define DmaCmd_InitTxChannel 0x7000
458 #define DmaCmd_InitRxChannel 0x7200
459 #define DmaCmd_ResetHighestDmaIus 0x8000
460 #define DmaCmd_ResetAllChannels 0x9000
461 #define DmaCmd_StartAllChannels 0xa000
462 #define DmaCmd_ContinueAllChannels 0xb000
463 #define DmaCmd_PauseAllChannels 0xc000
464 #define DmaCmd_AbortAllChannels 0xd000
465 #define DmaCmd_InitAllChannels 0xf000
467 #define TCmd_Null 0x0000
468 #define TCmd_ClearTxCRC 0x2000
469 #define TCmd_SelectTicrTtsaData 0x4000
470 #define TCmd_SelectTicrTxFifostatus 0x5000
471 #define TCmd_SelectTicrIntLevel 0x6000
472 #define TCmd_SelectTicrdma_level 0x7000
473 #define TCmd_SendFrame 0x8000
474 #define TCmd_SendAbort 0x9000
475 #define TCmd_EnableDleInsertion 0xc000
476 #define TCmd_DisableDleInsertion 0xd000
477 #define TCmd_ClearEofEom 0xe000
478 #define TCmd_SetEofEom 0xf000
480 #define RCmd_Null 0x0000
481 #define RCmd_ClearRxCRC 0x2000
482 #define RCmd_EnterHuntmode 0x3000
483 #define RCmd_SelectRicrRtsaData 0x4000
484 #define RCmd_SelectRicrRxFifostatus 0x5000
485 #define RCmd_SelectRicrIntLevel 0x6000
486 #define RCmd_SelectRicrdma_level 0x7000
489 * Bits for enabling and disabling IRQs in Interrupt Control Register (ICR)
492 #define RECEIVE_STATUS BIT5
493 #define RECEIVE_DATA BIT4
494 #define TRANSMIT_STATUS BIT3
495 #define TRANSMIT_DATA BIT2
501 * Receive status Bits in Receive Command/status Register RCSR
504 #define RXSTATUS_SHORT_FRAME BIT8
505 #define RXSTATUS_CODE_VIOLATION BIT8
506 #define RXSTATUS_EXITED_HUNT BIT7
507 #define RXSTATUS_IDLE_RECEIVED BIT6
508 #define RXSTATUS_BREAK_RECEIVED BIT5
509 #define RXSTATUS_ABORT_RECEIVED BIT5
510 #define RXSTATUS_RXBOUND BIT4
511 #define RXSTATUS_CRC_ERROR BIT3
512 #define RXSTATUS_FRAMING_ERROR BIT3
513 #define RXSTATUS_ABORT BIT2
514 #define RXSTATUS_PARITY_ERROR BIT2
515 #define RXSTATUS_OVERRUN BIT1
516 #define RXSTATUS_DATA_AVAILABLE BIT0
517 #define RXSTATUS_ALL 0x01f6
518 #define usc_UnlatchRxstatusBits(a,b) usc_OutReg( (a), RCSR, (u16)((b) & RXSTATUS_ALL) )
521 * Values for setting transmit idle mode in
522 * Transmit Control/status Register (TCSR)
524 #define IDLEMODE_FLAGS 0x0000
525 #define IDLEMODE_ALT_ONE_ZERO 0x0100
526 #define IDLEMODE_ZERO 0x0200
527 #define IDLEMODE_ONE 0x0300
528 #define IDLEMODE_ALT_MARK_SPACE 0x0500
529 #define IDLEMODE_SPACE 0x0600
530 #define IDLEMODE_MARK 0x0700
531 #define IDLEMODE_MASK 0x0700
534 * IUSC revision identifiers
536 #define IUSC_SL1660 0x4d44
537 #define IUSC_PRE_SL1660 0x4553
540 * Transmit status Bits in Transmit Command/status Register (TCSR)
543 #define TCSR_PRESERVE 0x0F00
545 #define TCSR_UNDERWAIT BIT11
546 #define TXSTATUS_PREAMBLE_SENT BIT7
547 #define TXSTATUS_IDLE_SENT BIT6
548 #define TXSTATUS_ABORT_SENT BIT5
549 #define TXSTATUS_EOF_SENT BIT4
550 #define TXSTATUS_EOM_SENT BIT4
551 #define TXSTATUS_CRC_SENT BIT3
552 #define TXSTATUS_ALL_SENT BIT2
553 #define TXSTATUS_UNDERRUN BIT1
554 #define TXSTATUS_FIFO_EMPTY BIT0
555 #define TXSTATUS_ALL 0x00fa
556 #define usc_UnlatchTxstatusBits(a,b) usc_OutReg( (a), TCSR, (u16)((a)->tcsr_value + ((b) & 0x00FF)) )
559 #define MISCSTATUS_RXC_LATCHED BIT15
560 #define MISCSTATUS_RXC BIT14
561 #define MISCSTATUS_TXC_LATCHED BIT13
562 #define MISCSTATUS_TXC BIT12
563 #define MISCSTATUS_RI_LATCHED BIT11
564 #define MISCSTATUS_RI BIT10
565 #define MISCSTATUS_DSR_LATCHED BIT9
566 #define MISCSTATUS_DSR BIT8
567 #define MISCSTATUS_DCD_LATCHED BIT7
568 #define MISCSTATUS_DCD BIT6
569 #define MISCSTATUS_CTS_LATCHED BIT5
570 #define MISCSTATUS_CTS BIT4
571 #define MISCSTATUS_RCC_UNDERRUN BIT3
572 #define MISCSTATUS_DPLL_NO_SYNC BIT2
573 #define MISCSTATUS_BRG1_ZERO BIT1
574 #define MISCSTATUS_BRG0_ZERO BIT0
576 #define usc_UnlatchIostatusBits(a,b) usc_OutReg((a),MISR,(u16)((b) & 0xaaa0))
577 #define usc_UnlatchMiscstatusBits(a,b) usc_OutReg((a),MISR,(u16)((b) & 0x000f))
579 #define SICR_RXC_ACTIVE BIT15
580 #define SICR_RXC_INACTIVE BIT14
581 #define SICR_RXC (BIT15|BIT14)
582 #define SICR_TXC_ACTIVE BIT13
583 #define SICR_TXC_INACTIVE BIT12
584 #define SICR_TXC (BIT13|BIT12)
585 #define SICR_RI_ACTIVE BIT11
586 #define SICR_RI_INACTIVE BIT10
587 #define SICR_RI (BIT11|BIT10)
588 #define SICR_DSR_ACTIVE BIT9
589 #define SICR_DSR_INACTIVE BIT8
590 #define SICR_DSR (BIT9|BIT8)
591 #define SICR_DCD_ACTIVE BIT7
592 #define SICR_DCD_INACTIVE BIT6
593 #define SICR_DCD (BIT7|BIT6)
594 #define SICR_CTS_ACTIVE BIT5
595 #define SICR_CTS_INACTIVE BIT4
596 #define SICR_CTS (BIT5|BIT4)
597 #define SICR_RCC_UNDERFLOW BIT3
598 #define SICR_DPLL_NO_SYNC BIT2
599 #define SICR_BRG1_ZERO BIT1
600 #define SICR_BRG0_ZERO BIT0
602 void usc_DisableMasterIrqBit( struct mgsl_struct *info );
603 void usc_EnableMasterIrqBit( struct mgsl_struct *info );
604 void usc_EnableInterrupts( struct mgsl_struct *info, u16 IrqMask );
605 void usc_DisableInterrupts( struct mgsl_struct *info, u16 IrqMask );
606 void usc_ClearIrqPendingBits( struct mgsl_struct *info, u16 IrqMask );
608 #define usc_EnableInterrupts( a, b ) \
609 usc_OutReg( (a), ICR, (u16)((usc_InReg((a),ICR) & 0xff00) + 0xc0 + (b)) )
611 #define usc_DisableInterrupts( a, b ) \
612 usc_OutReg( (a), ICR, (u16)((usc_InReg((a),ICR) & 0xff00) + 0x80 + (b)) )
614 #define usc_EnableMasterIrqBit(a) \
615 usc_OutReg( (a), ICR, (u16)((usc_InReg((a),ICR) & 0x0f00) + 0xb000) )
617 #define usc_DisableMasterIrqBit(a) \
618 usc_OutReg( (a), ICR, (u16)(usc_InReg((a),ICR) & 0x7f00) )
620 #define usc_ClearIrqPendingBits( a, b ) usc_OutReg( (a), DCCR, 0x40 + (b) )
623 * Transmit status Bits in Transmit Control status Register (TCSR)
624 * and Transmit Interrupt Control Register (TICR) (except BIT2, BIT0)
627 #define TXSTATUS_PREAMBLE_SENT BIT7
628 #define TXSTATUS_IDLE_SENT BIT6
629 #define TXSTATUS_ABORT_SENT BIT5
630 #define TXSTATUS_EOF BIT4
631 #define TXSTATUS_CRC_SENT BIT3
632 #define TXSTATUS_ALL_SENT BIT2
633 #define TXSTATUS_UNDERRUN BIT1
634 #define TXSTATUS_FIFO_EMPTY BIT0
636 #define DICR_MASTER BIT15
637 #define DICR_TRANSMIT BIT0
638 #define DICR_RECEIVE BIT1
640 #define usc_EnableDmaInterrupts(a,b) \
641 usc_OutDmaReg( (a), DICR, (u16)(usc_InDmaReg((a),DICR) | (b)) )
643 #define usc_DisableDmaInterrupts(a,b) \
644 usc_OutDmaReg( (a), DICR, (u16)(usc_InDmaReg((a),DICR) & ~(b)) )
646 #define usc_EnableStatusIrqs(a,b) \
647 usc_OutReg( (a), SICR, (u16)(usc_InReg((a),SICR) | (b)) )
649 #define usc_DisablestatusIrqs(a,b) \
650 usc_OutReg( (a), SICR, (u16)(usc_InReg((a),SICR) & ~(b)) )
652 /* Transmit status Bits in Transmit Control status Register (TCSR) */
653 /* and Transmit Interrupt Control Register (TICR) (except BIT2, BIT0) */
656 #define DISABLE_UNCONDITIONAL 0
657 #define DISABLE_END_OF_FRAME 1
658 #define ENABLE_UNCONDITIONAL 2
659 #define ENABLE_AUTO_CTS 3
660 #define ENABLE_AUTO_DCD 3
661 #define usc_EnableTransmitter(a,b) \
662 usc_OutReg( (a), TMR, (u16)((usc_InReg((a),TMR) & 0xfffc) | (b)) )
663 #define usc_EnableReceiver(a,b) \
664 usc_OutReg( (a), RMR, (u16)((usc_InReg((a),RMR) & 0xfffc) | (b)) )
666 static u16 usc_InDmaReg( struct mgsl_struct *info, u16 Port );
667 static void usc_OutDmaReg( struct mgsl_struct *info, u16 Port, u16 Value );
668 static void usc_DmaCmd( struct mgsl_struct *info, u16 Cmd );
670 static u16 usc_InReg( struct mgsl_struct *info, u16 Port );
671 static void usc_OutReg( struct mgsl_struct *info, u16 Port, u16 Value );
672 static void usc_RTCmd( struct mgsl_struct *info, u16 Cmd );
673 void usc_RCmd( struct mgsl_struct *info, u16 Cmd );
674 void usc_TCmd( struct mgsl_struct *info, u16 Cmd );
676 #define usc_TCmd(a,b) usc_OutReg((a), TCSR, (u16)((a)->tcsr_value + (b)))
677 #define usc_RCmd(a,b) usc_OutReg((a), RCSR, (b))
679 #define usc_SetTransmitSyncChars(a,s0,s1) usc_OutReg((a), TSR, (u16)(((u16)s0<<8)|(u16)s1))
681 static void usc_process_rxoverrun_sync( struct mgsl_struct *info );
682 static void usc_start_receiver( struct mgsl_struct *info );
683 static void usc_stop_receiver( struct mgsl_struct *info );
685 static void usc_start_transmitter( struct mgsl_struct *info );
686 static void usc_stop_transmitter( struct mgsl_struct *info );
687 static void usc_set_txidle( struct mgsl_struct *info );
688 static void usc_load_txfifo( struct mgsl_struct *info );
690 static void usc_enable_aux_clock( struct mgsl_struct *info, u32 DataRate );
691 static void usc_enable_loopback( struct mgsl_struct *info, int enable );
693 static void usc_get_serial_signals( struct mgsl_struct *info );
694 static void usc_set_serial_signals( struct mgsl_struct *info );
696 static void usc_reset( struct mgsl_struct *info );
698 static void usc_set_sync_mode( struct mgsl_struct *info );
699 static void usc_set_sdlc_mode( struct mgsl_struct *info );
700 static void usc_set_async_mode( struct mgsl_struct *info );
701 static void usc_enable_async_clock( struct mgsl_struct *info, u32 DataRate );
703 static void usc_loopback_frame( struct mgsl_struct *info );
705 static void mgsl_tx_timeout(unsigned long context);
708 static void usc_loopmode_cancel_transmit( struct mgsl_struct * info );
709 static void usc_loopmode_insert_request( struct mgsl_struct * info );
710 static int usc_loopmode_active( struct mgsl_struct * info);
711 static void usc_loopmode_send_done( struct mgsl_struct * info );
713 static int mgsl_ioctl_common(struct mgsl_struct *info, unsigned int cmd, unsigned long arg);
715 #if SYNCLINK_GENERIC_HDLC
716 #define dev_to_port(D) (dev_to_hdlc(D)->priv)
717 static void hdlcdev_tx_done(struct mgsl_struct *info);
718 static void hdlcdev_rx(struct mgsl_struct *info, char *buf, int size);
719 static int hdlcdev_init(struct mgsl_struct *info);
720 static void hdlcdev_exit(struct mgsl_struct *info);
724 * Defines a BUS descriptor value for the PCI adapter
725 * local bus address ranges.
728 #define BUS_DESCRIPTOR( WrHold, WrDly, RdDly, Nwdd, Nwad, Nxda, Nrdd, Nrad ) \
739 static void mgsl_trace_block(struct mgsl_struct *info,const char* data, int count, int xmit);
742 * Adapter diagnostic routines
744 static bool mgsl_register_test( struct mgsl_struct *info );
745 static bool mgsl_irq_test( struct mgsl_struct *info );
746 static bool mgsl_dma_test( struct mgsl_struct *info );
747 static bool mgsl_memory_test( struct mgsl_struct *info );
748 static int mgsl_adapter_test( struct mgsl_struct *info );
751 * device and resource management routines
753 static int mgsl_claim_resources(struct mgsl_struct *info);
754 static void mgsl_release_resources(struct mgsl_struct *info);
755 static void mgsl_add_device(struct mgsl_struct *info);
756 static struct mgsl_struct* mgsl_allocate_device(void);
759 * DMA buffer manupulation functions.
761 static void mgsl_free_rx_frame_buffers( struct mgsl_struct *info, unsigned int StartIndex, unsigned int EndIndex );
762 static bool mgsl_get_rx_frame( struct mgsl_struct *info );
763 static bool mgsl_get_raw_rx_frame( struct mgsl_struct *info );
764 static void mgsl_reset_rx_dma_buffers( struct mgsl_struct *info );
765 static void mgsl_reset_tx_dma_buffers( struct mgsl_struct *info );
766 static int num_free_tx_dma_buffers(struct mgsl_struct *info);
767 static void mgsl_load_tx_dma_buffer( struct mgsl_struct *info, const char *Buffer, unsigned int BufferSize);
768 static void mgsl_load_pci_memory(char* TargetPtr, const char* SourcePtr, unsigned short count);
771 * DMA and Shared Memory buffer allocation and formatting
773 static int mgsl_allocate_dma_buffers(struct mgsl_struct *info);
774 static void mgsl_free_dma_buffers(struct mgsl_struct *info);
775 static int mgsl_alloc_frame_memory(struct mgsl_struct *info, DMABUFFERENTRY *BufferList,int Buffercount);
776 static void mgsl_free_frame_memory(struct mgsl_struct *info, DMABUFFERENTRY *BufferList,int Buffercount);
777 static int mgsl_alloc_buffer_list_memory(struct mgsl_struct *info);
778 static void mgsl_free_buffer_list_memory(struct mgsl_struct *info);
779 static int mgsl_alloc_intermediate_rxbuffer_memory(struct mgsl_struct *info);
780 static void mgsl_free_intermediate_rxbuffer_memory(struct mgsl_struct *info);
781 static int mgsl_alloc_intermediate_txbuffer_memory(struct mgsl_struct *info);
782 static void mgsl_free_intermediate_txbuffer_memory(struct mgsl_struct *info);
783 static bool load_next_tx_holding_buffer(struct mgsl_struct *info);
784 static int save_tx_buffer_request(struct mgsl_struct *info,const char *Buffer, unsigned int BufferSize);
787 * Bottom half interrupt handlers
789 static void mgsl_bh_handler(struct work_struct *work);
790 static void mgsl_bh_receive(struct mgsl_struct *info);
791 static void mgsl_bh_transmit(struct mgsl_struct *info);
792 static void mgsl_bh_status(struct mgsl_struct *info);
795 * Interrupt handler routines and dispatch table.
797 static void mgsl_isr_null( struct mgsl_struct *info );
798 static void mgsl_isr_transmit_data( struct mgsl_struct *info );
799 static void mgsl_isr_receive_data( struct mgsl_struct *info );
800 static void mgsl_isr_receive_status( struct mgsl_struct *info );
801 static void mgsl_isr_transmit_status( struct mgsl_struct *info );
802 static void mgsl_isr_io_pin( struct mgsl_struct *info );
803 static void mgsl_isr_misc( struct mgsl_struct *info );
804 static void mgsl_isr_receive_dma( struct mgsl_struct *info );
805 static void mgsl_isr_transmit_dma( struct mgsl_struct *info );
807 typedef void (*isr_dispatch_func)(struct mgsl_struct *);
809 static isr_dispatch_func UscIsrTable[7] =
814 mgsl_isr_transmit_data,
815 mgsl_isr_transmit_status,
816 mgsl_isr_receive_data,
817 mgsl_isr_receive_status
821 * ioctl call handlers
823 static int tiocmget(struct tty_struct *tty);
824 static int tiocmset(struct tty_struct *tty,
825 unsigned int set, unsigned int clear);
826 static int mgsl_get_stats(struct mgsl_struct * info, struct mgsl_icount
827 __user *user_icount);
828 static int mgsl_get_params(struct mgsl_struct * info, MGSL_PARAMS __user *user_params);
829 static int mgsl_set_params(struct mgsl_struct * info, MGSL_PARAMS __user *new_params);
830 static int mgsl_get_txidle(struct mgsl_struct * info, int __user *idle_mode);
831 static int mgsl_set_txidle(struct mgsl_struct * info, int idle_mode);
832 static int mgsl_txenable(struct mgsl_struct * info, int enable);
833 static int mgsl_txabort(struct mgsl_struct * info);
834 static int mgsl_rxenable(struct mgsl_struct * info, int enable);
835 static int mgsl_wait_event(struct mgsl_struct * info, int __user *mask);
836 static int mgsl_loopmode_send_done( struct mgsl_struct * info );
838 /* set non-zero on successful registration with PCI subsystem */
839 static bool pci_registered;
842 * Global linked list of SyncLink devices
844 static struct mgsl_struct *mgsl_device_list;
845 static int mgsl_device_count;
848 * Set this param to non-zero to load eax with the
849 * .text section address and breakpoint on module load.
850 * This is useful for use with gdb and add-symbol-file command.
852 static bool break_on_load;
855 * Driver major number, defaults to zero to get auto
856 * assigned major number. May be forced as module parameter.
861 * Array of user specified options for ISA adapters.
863 static int io[MAX_ISA_DEVICES];
864 static int irq[MAX_ISA_DEVICES];
865 static int dma[MAX_ISA_DEVICES];
866 static int debug_level;
867 static int maxframe[MAX_TOTAL_DEVICES];
868 static int txdmabufs[MAX_TOTAL_DEVICES];
869 static int txholdbufs[MAX_TOTAL_DEVICES];
871 module_param(break_on_load, bool, 0);
872 module_param(ttymajor, int, 0);
873 module_param_hw_array(io, int, ioport, NULL, 0);
874 module_param_hw_array(irq, int, irq, NULL, 0);
875 module_param_hw_array(dma, int, dma, NULL, 0);
876 module_param(debug_level, int, 0);
877 module_param_array(maxframe, int, NULL, 0);
878 module_param_array(txdmabufs, int, NULL, 0);
879 module_param_array(txholdbufs, int, NULL, 0);
881 static char *driver_name = "SyncLink serial driver";
882 static char *driver_version = "$Revision: 4.38 $";
884 static int synclink_init_one (struct pci_dev *dev,
885 const struct pci_device_id *ent);
886 static void synclink_remove_one (struct pci_dev *dev);
888 static const struct pci_device_id synclink_pci_tbl[] = {
889 { PCI_VENDOR_ID_MICROGATE, PCI_DEVICE_ID_MICROGATE_USC, PCI_ANY_ID, PCI_ANY_ID, },
890 { PCI_VENDOR_ID_MICROGATE, 0x0210, PCI_ANY_ID, PCI_ANY_ID, },
891 { 0, }, /* terminate list */
893 MODULE_DEVICE_TABLE(pci, synclink_pci_tbl);
895 MODULE_LICENSE("GPL");
897 static struct pci_driver synclink_pci_driver = {
899 .id_table = synclink_pci_tbl,
900 .probe = synclink_init_one,
901 .remove = synclink_remove_one,
904 static struct tty_driver *serial_driver;
906 /* number of characters left in xmit buffer before we ask for more */
907 #define WAKEUP_CHARS 256
910 static void mgsl_change_params(struct mgsl_struct *info);
911 static void mgsl_wait_until_sent(struct tty_struct *tty, int timeout);
914 * 1st function defined in .text section. Calling this function in
915 * init_module() followed by a breakpoint allows a remote debugger
916 * (gdb) to get the .text address for the add-symbol-file command.
917 * This allows remote debugging of dynamically loadable modules.
919 static void* mgsl_get_text_ptr(void)
921 return mgsl_get_text_ptr;
924 static inline int mgsl_paranoia_check(struct mgsl_struct *info,
925 char *name, const char *routine)
927 #ifdef MGSL_PARANOIA_CHECK
928 static const char *badmagic =
929 "Warning: bad magic number for mgsl struct (%s) in %s\n";
930 static const char *badinfo =
931 "Warning: null mgsl_struct for (%s) in %s\n";
934 printk(badinfo, name, routine);
937 if (info->magic != MGSL_MAGIC) {
938 printk(badmagic, name, routine);
949 * line discipline callback wrappers
951 * The wrappers maintain line discipline references
952 * while calling into the line discipline.
954 * ldisc_receive_buf - pass receive data to line discipline
957 static void ldisc_receive_buf(struct tty_struct *tty,
958 const __u8 *data, char *flags, int count)
960 struct tty_ldisc *ld;
963 ld = tty_ldisc_ref(tty);
965 if (ld->ops->receive_buf)
966 ld->ops->receive_buf(tty, data, flags, count);
971 /* mgsl_stop() throttle (stop) transmitter
973 * Arguments: tty pointer to tty info structure
976 static void mgsl_stop(struct tty_struct *tty)
978 struct mgsl_struct *info = tty->driver_data;
981 if (mgsl_paranoia_check(info, tty->name, "mgsl_stop"))
984 if ( debug_level >= DEBUG_LEVEL_INFO )
985 printk("mgsl_stop(%s)\n",info->device_name);
987 spin_lock_irqsave(&info->irq_spinlock,flags);
988 if (info->tx_enabled)
989 usc_stop_transmitter(info);
990 spin_unlock_irqrestore(&info->irq_spinlock,flags);
992 } /* end of mgsl_stop() */
994 /* mgsl_start() release (start) transmitter
996 * Arguments: tty pointer to tty info structure
999 static void mgsl_start(struct tty_struct *tty)
1001 struct mgsl_struct *info = tty->driver_data;
1002 unsigned long flags;
1004 if (mgsl_paranoia_check(info, tty->name, "mgsl_start"))
1007 if ( debug_level >= DEBUG_LEVEL_INFO )
1008 printk("mgsl_start(%s)\n",info->device_name);
1010 spin_lock_irqsave(&info->irq_spinlock,flags);
1011 if (!info->tx_enabled)
1012 usc_start_transmitter(info);
1013 spin_unlock_irqrestore(&info->irq_spinlock,flags);
1015 } /* end of mgsl_start() */
1018 * Bottom half work queue access functions
1021 /* mgsl_bh_action() Return next bottom half action to perform.
1022 * Return Value: BH action code or 0 if nothing to do.
1024 static int mgsl_bh_action(struct mgsl_struct *info)
1026 unsigned long flags;
1029 spin_lock_irqsave(&info->irq_spinlock,flags);
1031 if (info->pending_bh & BH_RECEIVE) {
1032 info->pending_bh &= ~BH_RECEIVE;
1034 } else if (info->pending_bh & BH_TRANSMIT) {
1035 info->pending_bh &= ~BH_TRANSMIT;
1037 } else if (info->pending_bh & BH_STATUS) {
1038 info->pending_bh &= ~BH_STATUS;
1043 /* Mark BH routine as complete */
1044 info->bh_running = false;
1045 info->bh_requested = false;
1048 spin_unlock_irqrestore(&info->irq_spinlock,flags);
1054 * Perform bottom half processing of work items queued by ISR.
1056 static void mgsl_bh_handler(struct work_struct *work)
1058 struct mgsl_struct *info =
1059 container_of(work, struct mgsl_struct, task);
1062 if ( debug_level >= DEBUG_LEVEL_BH )
1063 printk( "%s(%d):mgsl_bh_handler(%s) entry\n",
1064 __FILE__,__LINE__,info->device_name);
1066 info->bh_running = true;
1068 while((action = mgsl_bh_action(info)) != 0) {
1070 /* Process work item */
1071 if ( debug_level >= DEBUG_LEVEL_BH )
1072 printk( "%s(%d):mgsl_bh_handler() work item action=%d\n",
1073 __FILE__,__LINE__,action);
1078 mgsl_bh_receive(info);
1081 mgsl_bh_transmit(info);
1084 mgsl_bh_status(info);
1087 /* unknown work item ID */
1088 printk("Unknown work item ID=%08X!\n", action);
1093 if ( debug_level >= DEBUG_LEVEL_BH )
1094 printk( "%s(%d):mgsl_bh_handler(%s) exit\n",
1095 __FILE__,__LINE__,info->device_name);
1098 static void mgsl_bh_receive(struct mgsl_struct *info)
1100 bool (*get_rx_frame)(struct mgsl_struct *info) =
1101 (info->params.mode == MGSL_MODE_HDLC ? mgsl_get_rx_frame : mgsl_get_raw_rx_frame);
1103 if ( debug_level >= DEBUG_LEVEL_BH )
1104 printk( "%s(%d):mgsl_bh_receive(%s)\n",
1105 __FILE__,__LINE__,info->device_name);
1109 if (info->rx_rcc_underrun) {
1110 unsigned long flags;
1111 spin_lock_irqsave(&info->irq_spinlock,flags);
1112 usc_start_receiver(info);
1113 spin_unlock_irqrestore(&info->irq_spinlock,flags);
1116 } while(get_rx_frame(info));
1119 static void mgsl_bh_transmit(struct mgsl_struct *info)
1121 struct tty_struct *tty = info->port.tty;
1122 unsigned long flags;
1124 if ( debug_level >= DEBUG_LEVEL_BH )
1125 printk( "%s(%d):mgsl_bh_transmit() entry on %s\n",
1126 __FILE__,__LINE__,info->device_name);
1131 /* if transmitter idle and loopmode_send_done_requested
1132 * then start echoing RxD to TxD
1134 spin_lock_irqsave(&info->irq_spinlock,flags);
1135 if ( !info->tx_active && info->loopmode_send_done_requested )
1136 usc_loopmode_send_done( info );
1137 spin_unlock_irqrestore(&info->irq_spinlock,flags);
1140 static void mgsl_bh_status(struct mgsl_struct *info)
1142 if ( debug_level >= DEBUG_LEVEL_BH )
1143 printk( "%s(%d):mgsl_bh_status() entry on %s\n",
1144 __FILE__,__LINE__,info->device_name);
1146 info->ri_chkcount = 0;
1147 info->dsr_chkcount = 0;
1148 info->dcd_chkcount = 0;
1149 info->cts_chkcount = 0;
1152 /* mgsl_isr_receive_status()
1154 * Service a receive status interrupt. The type of status
1155 * interrupt is indicated by the state of the RCSR.
1156 * This is only used for HDLC mode.
1158 * Arguments: info pointer to device instance data
1159 * Return Value: None
1161 static void mgsl_isr_receive_status( struct mgsl_struct *info )
1163 u16 status = usc_InReg( info, RCSR );
1165 if ( debug_level >= DEBUG_LEVEL_ISR )
1166 printk("%s(%d):mgsl_isr_receive_status status=%04X\n",
1167 __FILE__,__LINE__,status);
1169 if ( (status & RXSTATUS_ABORT_RECEIVED) &&
1170 info->loopmode_insert_requested &&
1171 usc_loopmode_active(info) )
1173 ++info->icount.rxabort;
1174 info->loopmode_insert_requested = false;
1176 /* clear CMR:13 to start echoing RxD to TxD */
1177 info->cmr_value &= ~BIT13;
1178 usc_OutReg(info, CMR, info->cmr_value);
1180 /* disable received abort irq (no longer required) */
1181 usc_OutReg(info, RICR,
1182 (usc_InReg(info, RICR) & ~RXSTATUS_ABORT_RECEIVED));
1185 if (status & (RXSTATUS_EXITED_HUNT | RXSTATUS_IDLE_RECEIVED)) {
1186 if (status & RXSTATUS_EXITED_HUNT)
1187 info->icount.exithunt++;
1188 if (status & RXSTATUS_IDLE_RECEIVED)
1189 info->icount.rxidle++;
1190 wake_up_interruptible(&info->event_wait_q);
1193 if (status & RXSTATUS_OVERRUN){
1194 info->icount.rxover++;
1195 usc_process_rxoverrun_sync( info );
1198 usc_ClearIrqPendingBits( info, RECEIVE_STATUS );
1199 usc_UnlatchRxstatusBits( info, status );
1201 } /* end of mgsl_isr_receive_status() */
1203 /* mgsl_isr_transmit_status()
1205 * Service a transmit status interrupt
1206 * HDLC mode :end of transmit frame
1207 * Async mode:all data is sent
1208 * transmit status is indicated by bits in the TCSR.
1210 * Arguments: info pointer to device instance data
1211 * Return Value: None
1213 static void mgsl_isr_transmit_status( struct mgsl_struct *info )
1215 u16 status = usc_InReg( info, TCSR );
1217 if ( debug_level >= DEBUG_LEVEL_ISR )
1218 printk("%s(%d):mgsl_isr_transmit_status status=%04X\n",
1219 __FILE__,__LINE__,status);
1221 usc_ClearIrqPendingBits( info, TRANSMIT_STATUS );
1222 usc_UnlatchTxstatusBits( info, status );
1224 if ( status & (TXSTATUS_UNDERRUN | TXSTATUS_ABORT_SENT) )
1226 /* finished sending HDLC abort. This may leave */
1227 /* the TxFifo with data from the aborted frame */
1228 /* so purge the TxFifo. Also shutdown the DMA */
1229 /* channel in case there is data remaining in */
1230 /* the DMA buffer */
1231 usc_DmaCmd( info, DmaCmd_ResetTxChannel );
1232 usc_RTCmd( info, RTCmd_PurgeTxFifo );
1235 if ( status & TXSTATUS_EOF_SENT )
1236 info->icount.txok++;
1237 else if ( status & TXSTATUS_UNDERRUN )
1238 info->icount.txunder++;
1239 else if ( status & TXSTATUS_ABORT_SENT )
1240 info->icount.txabort++;
1242 info->icount.txunder++;
1244 info->tx_active = false;
1245 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1246 del_timer(&info->tx_timer);
1248 if ( info->drop_rts_on_tx_done ) {
1249 usc_get_serial_signals( info );
1250 if ( info->serial_signals & SerialSignal_RTS ) {
1251 info->serial_signals &= ~SerialSignal_RTS;
1252 usc_set_serial_signals( info );
1254 info->drop_rts_on_tx_done = false;
1257 #if SYNCLINK_GENERIC_HDLC
1259 hdlcdev_tx_done(info);
1263 if (info->port.tty->stopped || info->port.tty->hw_stopped) {
1264 usc_stop_transmitter(info);
1267 info->pending_bh |= BH_TRANSMIT;
1270 } /* end of mgsl_isr_transmit_status() */
1272 /* mgsl_isr_io_pin()
1274 * Service an Input/Output pin interrupt. The type of
1275 * interrupt is indicated by bits in the MISR
1277 * Arguments: info pointer to device instance data
1278 * Return Value: None
1280 static void mgsl_isr_io_pin( struct mgsl_struct *info )
1282 struct mgsl_icount *icount;
1283 u16 status = usc_InReg( info, MISR );
1285 if ( debug_level >= DEBUG_LEVEL_ISR )
1286 printk("%s(%d):mgsl_isr_io_pin status=%04X\n",
1287 __FILE__,__LINE__,status);
1289 usc_ClearIrqPendingBits( info, IO_PIN );
1290 usc_UnlatchIostatusBits( info, status );
1292 if (status & (MISCSTATUS_CTS_LATCHED | MISCSTATUS_DCD_LATCHED |
1293 MISCSTATUS_DSR_LATCHED | MISCSTATUS_RI_LATCHED) ) {
1294 icount = &info->icount;
1295 /* update input line counters */
1296 if (status & MISCSTATUS_RI_LATCHED) {
1297 if ((info->ri_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
1298 usc_DisablestatusIrqs(info,SICR_RI);
1300 if ( status & MISCSTATUS_RI )
1301 info->input_signal_events.ri_up++;
1303 info->input_signal_events.ri_down++;
1305 if (status & MISCSTATUS_DSR_LATCHED) {
1306 if ((info->dsr_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
1307 usc_DisablestatusIrqs(info,SICR_DSR);
1309 if ( status & MISCSTATUS_DSR )
1310 info->input_signal_events.dsr_up++;
1312 info->input_signal_events.dsr_down++;
1314 if (status & MISCSTATUS_DCD_LATCHED) {
1315 if ((info->dcd_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
1316 usc_DisablestatusIrqs(info,SICR_DCD);
1318 if (status & MISCSTATUS_DCD) {
1319 info->input_signal_events.dcd_up++;
1321 info->input_signal_events.dcd_down++;
1322 #if SYNCLINK_GENERIC_HDLC
1323 if (info->netcount) {
1324 if (status & MISCSTATUS_DCD)
1325 netif_carrier_on(info->netdev);
1327 netif_carrier_off(info->netdev);
1331 if (status & MISCSTATUS_CTS_LATCHED)
1333 if ((info->cts_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
1334 usc_DisablestatusIrqs(info,SICR_CTS);
1336 if ( status & MISCSTATUS_CTS )
1337 info->input_signal_events.cts_up++;
1339 info->input_signal_events.cts_down++;
1341 wake_up_interruptible(&info->status_event_wait_q);
1342 wake_up_interruptible(&info->event_wait_q);
1344 if (tty_port_check_carrier(&info->port) &&
1345 (status & MISCSTATUS_DCD_LATCHED) ) {
1346 if ( debug_level >= DEBUG_LEVEL_ISR )
1347 printk("%s CD now %s...", info->device_name,
1348 (status & MISCSTATUS_DCD) ? "on" : "off");
1349 if (status & MISCSTATUS_DCD)
1350 wake_up_interruptible(&info->port.open_wait);
1352 if ( debug_level >= DEBUG_LEVEL_ISR )
1353 printk("doing serial hangup...");
1355 tty_hangup(info->port.tty);
1359 if (tty_port_cts_enabled(&info->port) &&
1360 (status & MISCSTATUS_CTS_LATCHED) ) {
1361 if (info->port.tty->hw_stopped) {
1362 if (status & MISCSTATUS_CTS) {
1363 if ( debug_level >= DEBUG_LEVEL_ISR )
1364 printk("CTS tx start...");
1365 info->port.tty->hw_stopped = 0;
1366 usc_start_transmitter(info);
1367 info->pending_bh |= BH_TRANSMIT;
1371 if (!(status & MISCSTATUS_CTS)) {
1372 if ( debug_level >= DEBUG_LEVEL_ISR )
1373 printk("CTS tx stop...");
1375 info->port.tty->hw_stopped = 1;
1376 usc_stop_transmitter(info);
1382 info->pending_bh |= BH_STATUS;
1384 /* for diagnostics set IRQ flag */
1385 if ( status & MISCSTATUS_TXC_LATCHED ){
1386 usc_OutReg( info, SICR,
1387 (unsigned short)(usc_InReg(info,SICR) & ~(SICR_TXC_ACTIVE+SICR_TXC_INACTIVE)) );
1388 usc_UnlatchIostatusBits( info, MISCSTATUS_TXC_LATCHED );
1389 info->irq_occurred = true;
1392 } /* end of mgsl_isr_io_pin() */
1394 /* mgsl_isr_transmit_data()
1396 * Service a transmit data interrupt (async mode only).
1398 * Arguments: info pointer to device instance data
1399 * Return Value: None
1401 static void mgsl_isr_transmit_data( struct mgsl_struct *info )
1403 if ( debug_level >= DEBUG_LEVEL_ISR )
1404 printk("%s(%d):mgsl_isr_transmit_data xmit_cnt=%d\n",
1405 __FILE__,__LINE__,info->xmit_cnt);
1407 usc_ClearIrqPendingBits( info, TRANSMIT_DATA );
1409 if (info->port.tty->stopped || info->port.tty->hw_stopped) {
1410 usc_stop_transmitter(info);
1414 if ( info->xmit_cnt )
1415 usc_load_txfifo( info );
1417 info->tx_active = false;
1419 if (info->xmit_cnt < WAKEUP_CHARS)
1420 info->pending_bh |= BH_TRANSMIT;
1422 } /* end of mgsl_isr_transmit_data() */
1424 /* mgsl_isr_receive_data()
1426 * Service a receive data interrupt. This occurs
1427 * when operating in asynchronous interrupt transfer mode.
1428 * The receive data FIFO is flushed to the receive data buffers.
1430 * Arguments: info pointer to device instance data
1431 * Return Value: None
1433 static void mgsl_isr_receive_data( struct mgsl_struct *info )
1438 unsigned char DataByte;
1439 struct mgsl_icount *icount = &info->icount;
1441 if ( debug_level >= DEBUG_LEVEL_ISR )
1442 printk("%s(%d):mgsl_isr_receive_data\n",
1445 usc_ClearIrqPendingBits( info, RECEIVE_DATA );
1447 /* select FIFO status for RICR readback */
1448 usc_RCmd( info, RCmd_SelectRicrRxFifostatus );
1450 /* clear the Wordstatus bit so that status readback */
1451 /* only reflects the status of this byte */
1452 usc_OutReg( info, RICR+LSBONLY, (u16)(usc_InReg(info, RICR+LSBONLY) & ~BIT3 ));
1454 /* flush the receive FIFO */
1456 while( (Fifocount = (usc_InReg(info,RICR) >> 8)) ) {
1459 /* read one byte from RxFIFO */
1460 outw( (inw(info->io_base + CCAR) & 0x0780) | (RDR+LSBONLY),
1461 info->io_base + CCAR );
1462 DataByte = inb( info->io_base + CCAR );
1464 /* get the status of the received byte */
1465 status = usc_InReg(info, RCSR);
1466 if ( status & (RXSTATUS_FRAMING_ERROR | RXSTATUS_PARITY_ERROR |
1467 RXSTATUS_OVERRUN | RXSTATUS_BREAK_RECEIVED) )
1468 usc_UnlatchRxstatusBits(info,RXSTATUS_ALL);
1473 if ( status & (RXSTATUS_FRAMING_ERROR | RXSTATUS_PARITY_ERROR |
1474 RXSTATUS_OVERRUN | RXSTATUS_BREAK_RECEIVED) ) {
1475 printk("rxerr=%04X\n",status);
1476 /* update error statistics */
1477 if ( status & RXSTATUS_BREAK_RECEIVED ) {
1478 status &= ~(RXSTATUS_FRAMING_ERROR | RXSTATUS_PARITY_ERROR);
1480 } else if (status & RXSTATUS_PARITY_ERROR)
1482 else if (status & RXSTATUS_FRAMING_ERROR)
1484 else if (status & RXSTATUS_OVERRUN) {
1485 /* must issue purge fifo cmd before */
1486 /* 16C32 accepts more receive chars */
1487 usc_RTCmd(info,RTCmd_PurgeRxFifo);
1491 /* discard char if tty control flags say so */
1492 if (status & info->ignore_status_mask)
1495 status &= info->read_status_mask;
1497 if (status & RXSTATUS_BREAK_RECEIVED) {
1499 if (info->port.flags & ASYNC_SAK)
1500 do_SAK(info->port.tty);
1501 } else if (status & RXSTATUS_PARITY_ERROR)
1503 else if (status & RXSTATUS_FRAMING_ERROR)
1505 } /* end of if (error) */
1506 tty_insert_flip_char(&info->port, DataByte, flag);
1507 if (status & RXSTATUS_OVERRUN) {
1508 /* Overrun is special, since it's
1509 * reported immediately, and doesn't
1510 * affect the current character
1512 work += tty_insert_flip_char(&info->port, 0, TTY_OVERRUN);
1516 if ( debug_level >= DEBUG_LEVEL_ISR ) {
1517 printk("%s(%d):rx=%d brk=%d parity=%d frame=%d overrun=%d\n",
1518 __FILE__,__LINE__,icount->rx,icount->brk,
1519 icount->parity,icount->frame,icount->overrun);
1523 tty_flip_buffer_push(&info->port);
1528 * Service a miscellaneous interrupt source.
1530 * Arguments: info pointer to device extension (instance data)
1531 * Return Value: None
1533 static void mgsl_isr_misc( struct mgsl_struct *info )
1535 u16 status = usc_InReg( info, MISR );
1537 if ( debug_level >= DEBUG_LEVEL_ISR )
1538 printk("%s(%d):mgsl_isr_misc status=%04X\n",
1539 __FILE__,__LINE__,status);
1541 if ((status & MISCSTATUS_RCC_UNDERRUN) &&
1542 (info->params.mode == MGSL_MODE_HDLC)) {
1544 /* turn off receiver and rx DMA */
1545 usc_EnableReceiver(info,DISABLE_UNCONDITIONAL);
1546 usc_DmaCmd(info, DmaCmd_ResetRxChannel);
1547 usc_UnlatchRxstatusBits(info, RXSTATUS_ALL);
1548 usc_ClearIrqPendingBits(info, RECEIVE_DATA | RECEIVE_STATUS);
1549 usc_DisableInterrupts(info, RECEIVE_DATA | RECEIVE_STATUS);
1551 /* schedule BH handler to restart receiver */
1552 info->pending_bh |= BH_RECEIVE;
1553 info->rx_rcc_underrun = true;
1556 usc_ClearIrqPendingBits( info, MISC );
1557 usc_UnlatchMiscstatusBits( info, status );
1559 } /* end of mgsl_isr_misc() */
1563 * Services undefined interrupt vectors from the
1564 * USC. (hence this function SHOULD never be called)
1566 * Arguments: info pointer to device extension (instance data)
1567 * Return Value: None
1569 static void mgsl_isr_null( struct mgsl_struct *info )
1572 } /* end of mgsl_isr_null() */
1574 /* mgsl_isr_receive_dma()
1576 * Service a receive DMA channel interrupt.
1577 * For this driver there are two sources of receive DMA interrupts
1578 * as identified in the Receive DMA mode Register (RDMR):
1580 * BIT3 EOA/EOL End of List, all receive buffers in receive
1581 * buffer list have been filled (no more free buffers
1582 * available). The DMA controller has shut down.
1584 * BIT2 EOB End of Buffer. This interrupt occurs when a receive
1585 * DMA buffer is terminated in response to completion
1586 * of a good frame or a frame with errors. The status
1587 * of the frame is stored in the buffer entry in the
1588 * list of receive buffer entries.
1590 * Arguments: info pointer to device instance data
1591 * Return Value: None
1593 static void mgsl_isr_receive_dma( struct mgsl_struct *info )
1597 /* clear interrupt pending and IUS bit for Rx DMA IRQ */
1598 usc_OutDmaReg( info, CDIR, BIT9 | BIT1 );
1600 /* Read the receive DMA status to identify interrupt type. */
1601 /* This also clears the status bits. */
1602 status = usc_InDmaReg( info, RDMR );
1604 if ( debug_level >= DEBUG_LEVEL_ISR )
1605 printk("%s(%d):mgsl_isr_receive_dma(%s) status=%04X\n",
1606 __FILE__,__LINE__,info->device_name,status);
1608 info->pending_bh |= BH_RECEIVE;
1610 if ( status & BIT3 ) {
1611 info->rx_overflow = true;
1612 info->icount.buf_overrun++;
1615 } /* end of mgsl_isr_receive_dma() */
1617 /* mgsl_isr_transmit_dma()
1619 * This function services a transmit DMA channel interrupt.
1621 * For this driver there is one source of transmit DMA interrupts
1622 * as identified in the Transmit DMA Mode Register (TDMR):
1624 * BIT2 EOB End of Buffer. This interrupt occurs when a
1625 * transmit DMA buffer has been emptied.
1627 * The driver maintains enough transmit DMA buffers to hold at least
1628 * one max frame size transmit frame. When operating in a buffered
1629 * transmit mode, there may be enough transmit DMA buffers to hold at
1630 * least two or more max frame size frames. On an EOB condition,
1631 * determine if there are any queued transmit buffers and copy into
1632 * transmit DMA buffers if we have room.
1634 * Arguments: info pointer to device instance data
1635 * Return Value: None
1637 static void mgsl_isr_transmit_dma( struct mgsl_struct *info )
1641 /* clear interrupt pending and IUS bit for Tx DMA IRQ */
1642 usc_OutDmaReg(info, CDIR, BIT8 | BIT0 );
1644 /* Read the transmit DMA status to identify interrupt type. */
1645 /* This also clears the status bits. */
1647 status = usc_InDmaReg( info, TDMR );
1649 if ( debug_level >= DEBUG_LEVEL_ISR )
1650 printk("%s(%d):mgsl_isr_transmit_dma(%s) status=%04X\n",
1651 __FILE__,__LINE__,info->device_name,status);
1653 if ( status & BIT2 ) {
1654 --info->tx_dma_buffers_used;
1656 /* if there are transmit frames queued,
1657 * try to load the next one
1659 if ( load_next_tx_holding_buffer(info) ) {
1660 /* if call returns non-zero value, we have
1661 * at least one free tx holding buffer
1663 info->pending_bh |= BH_TRANSMIT;
1667 } /* end of mgsl_isr_transmit_dma() */
1671 * Interrupt service routine entry point.
1675 * irq interrupt number that caused interrupt
1676 * dev_id device ID supplied during interrupt registration
1678 * Return Value: None
1680 static irqreturn_t mgsl_interrupt(int dummy, void *dev_id)
1682 struct mgsl_struct *info = dev_id;
1686 if ( debug_level >= DEBUG_LEVEL_ISR )
1687 printk(KERN_DEBUG "%s(%d):mgsl_interrupt(%d)entry.\n",
1688 __FILE__, __LINE__, info->irq_level);
1690 spin_lock(&info->irq_spinlock);
1693 /* Read the interrupt vectors from hardware. */
1694 UscVector = usc_InReg(info, IVR) >> 9;
1695 DmaVector = usc_InDmaReg(info, DIVR);
1697 if ( debug_level >= DEBUG_LEVEL_ISR )
1698 printk("%s(%d):%s UscVector=%08X DmaVector=%08X\n",
1699 __FILE__,__LINE__,info->device_name,UscVector,DmaVector);
1701 if ( !UscVector && !DmaVector )
1704 /* Dispatch interrupt vector */
1706 (*UscIsrTable[UscVector])(info);
1707 else if ( (DmaVector&(BIT10|BIT9)) == BIT10)
1708 mgsl_isr_transmit_dma(info);
1710 mgsl_isr_receive_dma(info);
1712 if ( info->isr_overflow ) {
1713 printk(KERN_ERR "%s(%d):%s isr overflow irq=%d\n",
1714 __FILE__, __LINE__, info->device_name, info->irq_level);
1715 usc_DisableMasterIrqBit(info);
1716 usc_DisableDmaInterrupts(info,DICR_MASTER);
1721 /* Request bottom half processing if there's something
1722 * for it to do and the bh is not already running
1725 if ( info->pending_bh && !info->bh_running && !info->bh_requested ) {
1726 if ( debug_level >= DEBUG_LEVEL_ISR )
1727 printk("%s(%d):%s queueing bh task.\n",
1728 __FILE__,__LINE__,info->device_name);
1729 schedule_work(&info->task);
1730 info->bh_requested = true;
1733 spin_unlock(&info->irq_spinlock);
1735 if ( debug_level >= DEBUG_LEVEL_ISR )
1736 printk(KERN_DEBUG "%s(%d):mgsl_interrupt(%d)exit.\n",
1737 __FILE__, __LINE__, info->irq_level);
1740 } /* end of mgsl_interrupt() */
1744 * Initialize and start device.
1746 * Arguments: info pointer to device instance data
1747 * Return Value: 0 if success, otherwise error code
1749 static int startup(struct mgsl_struct * info)
1753 if ( debug_level >= DEBUG_LEVEL_INFO )
1754 printk("%s(%d):mgsl_startup(%s)\n",__FILE__,__LINE__,info->device_name);
1756 if (tty_port_initialized(&info->port))
1759 if (!info->xmit_buf) {
1760 /* allocate a page of memory for a transmit buffer */
1761 info->xmit_buf = (unsigned char *)get_zeroed_page(GFP_KERNEL);
1762 if (!info->xmit_buf) {
1763 printk(KERN_ERR"%s(%d):%s can't allocate transmit buffer\n",
1764 __FILE__,__LINE__,info->device_name);
1769 info->pending_bh = 0;
1771 memset(&info->icount, 0, sizeof(info->icount));
1773 setup_timer(&info->tx_timer, mgsl_tx_timeout, (unsigned long)info);
1775 /* Allocate and claim adapter resources */
1776 retval = mgsl_claim_resources(info);
1778 /* perform existence check and diagnostics */
1780 retval = mgsl_adapter_test(info);
1783 if (capable(CAP_SYS_ADMIN) && info->port.tty)
1784 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
1785 mgsl_release_resources(info);
1789 /* program hardware for current parameters */
1790 mgsl_change_params(info);
1793 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
1795 tty_port_set_initialized(&info->port, 1);
1798 } /* end of startup() */
1802 * Called by mgsl_close() and mgsl_hangup() to shutdown hardware
1804 * Arguments: info pointer to device instance data
1805 * Return Value: None
1807 static void shutdown(struct mgsl_struct * info)
1809 unsigned long flags;
1811 if (!tty_port_initialized(&info->port))
1814 if (debug_level >= DEBUG_LEVEL_INFO)
1815 printk("%s(%d):mgsl_shutdown(%s)\n",
1816 __FILE__,__LINE__, info->device_name );
1818 /* clear status wait queue because status changes */
1819 /* can't happen after shutting down the hardware */
1820 wake_up_interruptible(&info->status_event_wait_q);
1821 wake_up_interruptible(&info->event_wait_q);
1823 del_timer_sync(&info->tx_timer);
1825 if (info->xmit_buf) {
1826 free_page((unsigned long) info->xmit_buf);
1827 info->xmit_buf = NULL;
1830 spin_lock_irqsave(&info->irq_spinlock,flags);
1831 usc_DisableMasterIrqBit(info);
1832 usc_stop_receiver(info);
1833 usc_stop_transmitter(info);
1834 usc_DisableInterrupts(info,RECEIVE_DATA | RECEIVE_STATUS |
1835 TRANSMIT_DATA | TRANSMIT_STATUS | IO_PIN | MISC );
1836 usc_DisableDmaInterrupts(info,DICR_MASTER + DICR_TRANSMIT + DICR_RECEIVE);
1838 /* Disable DMAEN (Port 7, Bit 14) */
1839 /* This disconnects the DMA request signal from the ISA bus */
1840 /* on the ISA adapter. This has no effect for the PCI adapter */
1841 usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT15) | BIT14));
1843 /* Disable INTEN (Port 6, Bit12) */
1844 /* This disconnects the IRQ request signal to the ISA bus */
1845 /* on the ISA adapter. This has no effect for the PCI adapter */
1846 usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT13) | BIT12));
1848 if (!info->port.tty || info->port.tty->termios.c_cflag & HUPCL) {
1849 info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
1850 usc_set_serial_signals(info);
1853 spin_unlock_irqrestore(&info->irq_spinlock,flags);
1855 mgsl_release_resources(info);
1858 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
1860 tty_port_set_initialized(&info->port, 0);
1861 } /* end of shutdown() */
1863 static void mgsl_program_hw(struct mgsl_struct *info)
1865 unsigned long flags;
1867 spin_lock_irqsave(&info->irq_spinlock,flags);
1869 usc_stop_receiver(info);
1870 usc_stop_transmitter(info);
1871 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1873 if (info->params.mode == MGSL_MODE_HDLC ||
1874 info->params.mode == MGSL_MODE_RAW ||
1876 usc_set_sync_mode(info);
1878 usc_set_async_mode(info);
1880 usc_set_serial_signals(info);
1882 info->dcd_chkcount = 0;
1883 info->cts_chkcount = 0;
1884 info->ri_chkcount = 0;
1885 info->dsr_chkcount = 0;
1887 usc_EnableStatusIrqs(info,SICR_CTS+SICR_DSR+SICR_DCD+SICR_RI);
1888 usc_EnableInterrupts(info, IO_PIN);
1889 usc_get_serial_signals(info);
1891 if (info->netcount || info->port.tty->termios.c_cflag & CREAD)
1892 usc_start_receiver(info);
1894 spin_unlock_irqrestore(&info->irq_spinlock,flags);
1897 /* Reconfigure adapter based on new parameters
1899 static void mgsl_change_params(struct mgsl_struct *info)
1904 if (!info->port.tty)
1907 if (debug_level >= DEBUG_LEVEL_INFO)
1908 printk("%s(%d):mgsl_change_params(%s)\n",
1909 __FILE__,__LINE__, info->device_name );
1911 cflag = info->port.tty->termios.c_cflag;
1913 /* if B0 rate (hangup) specified then negate RTS and DTR */
1914 /* otherwise assert RTS and DTR */
1916 info->serial_signals |= SerialSignal_RTS | SerialSignal_DTR;
1918 info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
1920 /* byte size and parity */
1922 switch (cflag & CSIZE) {
1923 case CS5: info->params.data_bits = 5; break;
1924 case CS6: info->params.data_bits = 6; break;
1925 case CS7: info->params.data_bits = 7; break;
1926 case CS8: info->params.data_bits = 8; break;
1927 /* Never happens, but GCC is too dumb to figure it out */
1928 default: info->params.data_bits = 7; break;
1932 info->params.stop_bits = 2;
1934 info->params.stop_bits = 1;
1936 info->params.parity = ASYNC_PARITY_NONE;
1937 if (cflag & PARENB) {
1939 info->params.parity = ASYNC_PARITY_ODD;
1941 info->params.parity = ASYNC_PARITY_EVEN;
1944 info->params.parity = ASYNC_PARITY_SPACE;
1948 /* calculate number of jiffies to transmit a full
1949 * FIFO (32 bytes) at specified data rate
1951 bits_per_char = info->params.data_bits +
1952 info->params.stop_bits + 1;
1954 /* if port data rate is set to 460800 or less then
1955 * allow tty settings to override, otherwise keep the
1956 * current data rate.
1958 if (info->params.data_rate <= 460800)
1959 info->params.data_rate = tty_get_baud_rate(info->port.tty);
1961 if ( info->params.data_rate ) {
1962 info->timeout = (32*HZ*bits_per_char) /
1963 info->params.data_rate;
1965 info->timeout += HZ/50; /* Add .02 seconds of slop */
1967 tty_port_set_cts_flow(&info->port, cflag & CRTSCTS);
1968 tty_port_set_check_carrier(&info->port, ~cflag & CLOCAL);
1970 /* process tty input control flags */
1972 info->read_status_mask = RXSTATUS_OVERRUN;
1973 if (I_INPCK(info->port.tty))
1974 info->read_status_mask |= RXSTATUS_PARITY_ERROR | RXSTATUS_FRAMING_ERROR;
1975 if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty))
1976 info->read_status_mask |= RXSTATUS_BREAK_RECEIVED;
1978 if (I_IGNPAR(info->port.tty))
1979 info->ignore_status_mask |= RXSTATUS_PARITY_ERROR | RXSTATUS_FRAMING_ERROR;
1980 if (I_IGNBRK(info->port.tty)) {
1981 info->ignore_status_mask |= RXSTATUS_BREAK_RECEIVED;
1982 /* If ignoring parity and break indicators, ignore
1983 * overruns too. (For real raw support).
1985 if (I_IGNPAR(info->port.tty))
1986 info->ignore_status_mask |= RXSTATUS_OVERRUN;
1989 mgsl_program_hw(info);
1991 } /* end of mgsl_change_params() */
1995 * Add a character to the transmit buffer.
1997 * Arguments: tty pointer to tty information structure
1998 * ch character to add to transmit buffer
2000 * Return Value: None
2002 static int mgsl_put_char(struct tty_struct *tty, unsigned char ch)
2004 struct mgsl_struct *info = tty->driver_data;
2005 unsigned long flags;
2008 if (debug_level >= DEBUG_LEVEL_INFO) {
2009 printk(KERN_DEBUG "%s(%d):mgsl_put_char(%d) on %s\n",
2010 __FILE__, __LINE__, ch, info->device_name);
2013 if (mgsl_paranoia_check(info, tty->name, "mgsl_put_char"))
2016 if (!info->xmit_buf)
2019 spin_lock_irqsave(&info->irq_spinlock, flags);
2021 if ((info->params.mode == MGSL_MODE_ASYNC ) || !info->tx_active) {
2022 if (info->xmit_cnt < SERIAL_XMIT_SIZE - 1) {
2023 info->xmit_buf[info->xmit_head++] = ch;
2024 info->xmit_head &= SERIAL_XMIT_SIZE-1;
2029 spin_unlock_irqrestore(&info->irq_spinlock, flags);
2032 } /* end of mgsl_put_char() */
2034 /* mgsl_flush_chars()
2036 * Enable transmitter so remaining characters in the
2037 * transmit buffer are sent.
2039 * Arguments: tty pointer to tty information structure
2040 * Return Value: None
2042 static void mgsl_flush_chars(struct tty_struct *tty)
2044 struct mgsl_struct *info = tty->driver_data;
2045 unsigned long flags;
2047 if ( debug_level >= DEBUG_LEVEL_INFO )
2048 printk( "%s(%d):mgsl_flush_chars() entry on %s xmit_cnt=%d\n",
2049 __FILE__,__LINE__,info->device_name,info->xmit_cnt);
2051 if (mgsl_paranoia_check(info, tty->name, "mgsl_flush_chars"))
2054 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2058 if ( debug_level >= DEBUG_LEVEL_INFO )
2059 printk( "%s(%d):mgsl_flush_chars() entry on %s starting transmitter\n",
2060 __FILE__,__LINE__,info->device_name );
2062 spin_lock_irqsave(&info->irq_spinlock,flags);
2064 if (!info->tx_active) {
2065 if ( (info->params.mode == MGSL_MODE_HDLC ||
2066 info->params.mode == MGSL_MODE_RAW) && info->xmit_cnt ) {
2067 /* operating in synchronous (frame oriented) mode */
2068 /* copy data from circular xmit_buf to */
2069 /* transmit DMA buffer. */
2070 mgsl_load_tx_dma_buffer(info,
2071 info->xmit_buf,info->xmit_cnt);
2073 usc_start_transmitter(info);
2076 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2078 } /* end of mgsl_flush_chars() */
2082 * Send a block of data
2086 * tty pointer to tty information structure
2087 * buf pointer to buffer containing send data
2088 * count size of send data in bytes
2090 * Return Value: number of characters written
2092 static int mgsl_write(struct tty_struct * tty,
2093 const unsigned char *buf, int count)
2096 struct mgsl_struct *info = tty->driver_data;
2097 unsigned long flags;
2099 if ( debug_level >= DEBUG_LEVEL_INFO )
2100 printk( "%s(%d):mgsl_write(%s) count=%d\n",
2101 __FILE__,__LINE__,info->device_name,count);
2103 if (mgsl_paranoia_check(info, tty->name, "mgsl_write"))
2106 if (!info->xmit_buf)
2109 if ( info->params.mode == MGSL_MODE_HDLC ||
2110 info->params.mode == MGSL_MODE_RAW ) {
2111 /* operating in synchronous (frame oriented) mode */
2112 if (info->tx_active) {
2114 if ( info->params.mode == MGSL_MODE_HDLC ) {
2118 /* transmitter is actively sending data -
2119 * if we have multiple transmit dma and
2120 * holding buffers, attempt to queue this
2121 * frame for transmission at a later time.
2123 if (info->tx_holding_count >= info->num_tx_holding_buffers ) {
2124 /* no tx holding buffers available */
2129 /* queue transmit frame request */
2131 save_tx_buffer_request(info,buf,count);
2133 /* if we have sufficient tx dma buffers,
2134 * load the next buffered tx request
2136 spin_lock_irqsave(&info->irq_spinlock,flags);
2137 load_next_tx_holding_buffer(info);
2138 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2142 /* if operating in HDLC LoopMode and the adapter */
2143 /* has yet to be inserted into the loop, we can't */
2146 if ( (info->params.flags & HDLC_FLAG_HDLC_LOOPMODE) &&
2147 !usc_loopmode_active(info) )
2153 if ( info->xmit_cnt ) {
2154 /* Send accumulated from send_char() calls */
2155 /* as frame and wait before accepting more data. */
2158 /* copy data from circular xmit_buf to */
2159 /* transmit DMA buffer. */
2160 mgsl_load_tx_dma_buffer(info,
2161 info->xmit_buf,info->xmit_cnt);
2162 if ( debug_level >= DEBUG_LEVEL_INFO )
2163 printk( "%s(%d):mgsl_write(%s) sync xmit_cnt flushing\n",
2164 __FILE__,__LINE__,info->device_name);
2166 if ( debug_level >= DEBUG_LEVEL_INFO )
2167 printk( "%s(%d):mgsl_write(%s) sync transmit accepted\n",
2168 __FILE__,__LINE__,info->device_name);
2170 info->xmit_cnt = count;
2171 mgsl_load_tx_dma_buffer(info,buf,count);
2175 spin_lock_irqsave(&info->irq_spinlock,flags);
2176 c = min_t(int, count,
2177 min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
2178 SERIAL_XMIT_SIZE - info->xmit_head));
2180 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2183 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2184 info->xmit_head = ((info->xmit_head + c) &
2185 (SERIAL_XMIT_SIZE-1));
2186 info->xmit_cnt += c;
2187 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2194 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
2195 spin_lock_irqsave(&info->irq_spinlock,flags);
2196 if (!info->tx_active)
2197 usc_start_transmitter(info);
2198 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2201 if ( debug_level >= DEBUG_LEVEL_INFO )
2202 printk( "%s(%d):mgsl_write(%s) returning=%d\n",
2203 __FILE__,__LINE__,info->device_name,ret);
2207 } /* end of mgsl_write() */
2209 /* mgsl_write_room()
2211 * Return the count of free bytes in transmit buffer
2213 * Arguments: tty pointer to tty info structure
2214 * Return Value: None
2216 static int mgsl_write_room(struct tty_struct *tty)
2218 struct mgsl_struct *info = tty->driver_data;
2221 if (mgsl_paranoia_check(info, tty->name, "mgsl_write_room"))
2223 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2227 if (debug_level >= DEBUG_LEVEL_INFO)
2228 printk("%s(%d):mgsl_write_room(%s)=%d\n",
2229 __FILE__,__LINE__, info->device_name,ret );
2231 if ( info->params.mode == MGSL_MODE_HDLC ||
2232 info->params.mode == MGSL_MODE_RAW ) {
2233 /* operating in synchronous (frame oriented) mode */
2234 if ( info->tx_active )
2237 return HDLC_MAX_FRAME_SIZE;
2242 } /* end of mgsl_write_room() */
2244 /* mgsl_chars_in_buffer()
2246 * Return the count of bytes in transmit buffer
2248 * Arguments: tty pointer to tty info structure
2249 * Return Value: None
2251 static int mgsl_chars_in_buffer(struct tty_struct *tty)
2253 struct mgsl_struct *info = tty->driver_data;
2255 if (debug_level >= DEBUG_LEVEL_INFO)
2256 printk("%s(%d):mgsl_chars_in_buffer(%s)\n",
2257 __FILE__,__LINE__, info->device_name );
2259 if (mgsl_paranoia_check(info, tty->name, "mgsl_chars_in_buffer"))
2262 if (debug_level >= DEBUG_LEVEL_INFO)
2263 printk("%s(%d):mgsl_chars_in_buffer(%s)=%d\n",
2264 __FILE__,__LINE__, info->device_name,info->xmit_cnt );
2266 if ( info->params.mode == MGSL_MODE_HDLC ||
2267 info->params.mode == MGSL_MODE_RAW ) {
2268 /* operating in synchronous (frame oriented) mode */
2269 if ( info->tx_active )
2270 return info->max_frame_size;
2275 return info->xmit_cnt;
2276 } /* end of mgsl_chars_in_buffer() */
2278 /* mgsl_flush_buffer()
2280 * Discard all data in the send buffer
2282 * Arguments: tty pointer to tty info structure
2283 * Return Value: None
2285 static void mgsl_flush_buffer(struct tty_struct *tty)
2287 struct mgsl_struct *info = tty->driver_data;
2288 unsigned long flags;
2290 if (debug_level >= DEBUG_LEVEL_INFO)
2291 printk("%s(%d):mgsl_flush_buffer(%s) entry\n",
2292 __FILE__,__LINE__, info->device_name );
2294 if (mgsl_paranoia_check(info, tty->name, "mgsl_flush_buffer"))
2297 spin_lock_irqsave(&info->irq_spinlock,flags);
2298 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2299 del_timer(&info->tx_timer);
2300 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2305 /* mgsl_send_xchar()
2307 * Send a high-priority XON/XOFF character
2309 * Arguments: tty pointer to tty info structure
2310 * ch character to send
2311 * Return Value: None
2313 static void mgsl_send_xchar(struct tty_struct *tty, char ch)
2315 struct mgsl_struct *info = tty->driver_data;
2316 unsigned long flags;
2318 if (debug_level >= DEBUG_LEVEL_INFO)
2319 printk("%s(%d):mgsl_send_xchar(%s,%d)\n",
2320 __FILE__,__LINE__, info->device_name, ch );
2322 if (mgsl_paranoia_check(info, tty->name, "mgsl_send_xchar"))
2327 /* Make sure transmit interrupts are on */
2328 spin_lock_irqsave(&info->irq_spinlock,flags);
2329 if (!info->tx_enabled)
2330 usc_start_transmitter(info);
2331 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2333 } /* end of mgsl_send_xchar() */
2337 * Signal remote device to throttle send data (our receive data)
2339 * Arguments: tty pointer to tty info structure
2340 * Return Value: None
2342 static void mgsl_throttle(struct tty_struct * tty)
2344 struct mgsl_struct *info = tty->driver_data;
2345 unsigned long flags;
2347 if (debug_level >= DEBUG_LEVEL_INFO)
2348 printk("%s(%d):mgsl_throttle(%s) entry\n",
2349 __FILE__,__LINE__, info->device_name );
2351 if (mgsl_paranoia_check(info, tty->name, "mgsl_throttle"))
2355 mgsl_send_xchar(tty, STOP_CHAR(tty));
2357 if (C_CRTSCTS(tty)) {
2358 spin_lock_irqsave(&info->irq_spinlock,flags);
2359 info->serial_signals &= ~SerialSignal_RTS;
2360 usc_set_serial_signals(info);
2361 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2363 } /* end of mgsl_throttle() */
2365 /* mgsl_unthrottle()
2367 * Signal remote device to stop throttling send data (our receive data)
2369 * Arguments: tty pointer to tty info structure
2370 * Return Value: None
2372 static void mgsl_unthrottle(struct tty_struct * tty)
2374 struct mgsl_struct *info = tty->driver_data;
2375 unsigned long flags;
2377 if (debug_level >= DEBUG_LEVEL_INFO)
2378 printk("%s(%d):mgsl_unthrottle(%s) entry\n",
2379 __FILE__,__LINE__, info->device_name );
2381 if (mgsl_paranoia_check(info, tty->name, "mgsl_unthrottle"))
2388 mgsl_send_xchar(tty, START_CHAR(tty));
2391 if (C_CRTSCTS(tty)) {
2392 spin_lock_irqsave(&info->irq_spinlock,flags);
2393 info->serial_signals |= SerialSignal_RTS;
2394 usc_set_serial_signals(info);
2395 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2398 } /* end of mgsl_unthrottle() */
2402 * get the current serial parameters information
2404 * Arguments: info pointer to device instance data
2405 * user_icount pointer to buffer to hold returned stats
2407 * Return Value: 0 if success, otherwise error code
2409 static int mgsl_get_stats(struct mgsl_struct * info, struct mgsl_icount __user *user_icount)
2413 if (debug_level >= DEBUG_LEVEL_INFO)
2414 printk("%s(%d):mgsl_get_params(%s)\n",
2415 __FILE__,__LINE__, info->device_name);
2418 memset(&info->icount, 0, sizeof(info->icount));
2420 mutex_lock(&info->port.mutex);
2421 COPY_TO_USER(err, user_icount, &info->icount, sizeof(struct mgsl_icount));
2422 mutex_unlock(&info->port.mutex);
2429 } /* end of mgsl_get_stats() */
2431 /* mgsl_get_params()
2433 * get the current serial parameters information
2435 * Arguments: info pointer to device instance data
2436 * user_params pointer to buffer to hold returned params
2438 * Return Value: 0 if success, otherwise error code
2440 static int mgsl_get_params(struct mgsl_struct * info, MGSL_PARAMS __user *user_params)
2443 if (debug_level >= DEBUG_LEVEL_INFO)
2444 printk("%s(%d):mgsl_get_params(%s)\n",
2445 __FILE__,__LINE__, info->device_name);
2447 mutex_lock(&info->port.mutex);
2448 COPY_TO_USER(err,user_params, &info->params, sizeof(MGSL_PARAMS));
2449 mutex_unlock(&info->port.mutex);
2451 if ( debug_level >= DEBUG_LEVEL_INFO )
2452 printk( "%s(%d):mgsl_get_params(%s) user buffer copy failed\n",
2453 __FILE__,__LINE__,info->device_name);
2459 } /* end of mgsl_get_params() */
2461 /* mgsl_set_params()
2463 * set the serial parameters
2467 * info pointer to device instance data
2468 * new_params user buffer containing new serial params
2470 * Return Value: 0 if success, otherwise error code
2472 static int mgsl_set_params(struct mgsl_struct * info, MGSL_PARAMS __user *new_params)
2474 unsigned long flags;
2475 MGSL_PARAMS tmp_params;
2478 if (debug_level >= DEBUG_LEVEL_INFO)
2479 printk("%s(%d):mgsl_set_params %s\n", __FILE__,__LINE__,
2480 info->device_name );
2481 COPY_FROM_USER(err,&tmp_params, new_params, sizeof(MGSL_PARAMS));
2483 if ( debug_level >= DEBUG_LEVEL_INFO )
2484 printk( "%s(%d):mgsl_set_params(%s) user buffer copy failed\n",
2485 __FILE__,__LINE__,info->device_name);
2489 mutex_lock(&info->port.mutex);
2490 spin_lock_irqsave(&info->irq_spinlock,flags);
2491 memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS));
2492 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2494 mgsl_change_params(info);
2495 mutex_unlock(&info->port.mutex);
2499 } /* end of mgsl_set_params() */
2501 /* mgsl_get_txidle()
2503 * get the current transmit idle mode
2505 * Arguments: info pointer to device instance data
2506 * idle_mode pointer to buffer to hold returned idle mode
2508 * Return Value: 0 if success, otherwise error code
2510 static int mgsl_get_txidle(struct mgsl_struct * info, int __user *idle_mode)
2514 if (debug_level >= DEBUG_LEVEL_INFO)
2515 printk("%s(%d):mgsl_get_txidle(%s)=%d\n",
2516 __FILE__,__LINE__, info->device_name, info->idle_mode);
2518 COPY_TO_USER(err,idle_mode, &info->idle_mode, sizeof(int));
2520 if ( debug_level >= DEBUG_LEVEL_INFO )
2521 printk( "%s(%d):mgsl_get_txidle(%s) user buffer copy failed\n",
2522 __FILE__,__LINE__,info->device_name);
2528 } /* end of mgsl_get_txidle() */
2530 /* mgsl_set_txidle() service ioctl to set transmit idle mode
2532 * Arguments: info pointer to device instance data
2533 * idle_mode new idle mode
2535 * Return Value: 0 if success, otherwise error code
2537 static int mgsl_set_txidle(struct mgsl_struct * info, int idle_mode)
2539 unsigned long flags;
2541 if (debug_level >= DEBUG_LEVEL_INFO)
2542 printk("%s(%d):mgsl_set_txidle(%s,%d)\n", __FILE__,__LINE__,
2543 info->device_name, idle_mode );
2545 spin_lock_irqsave(&info->irq_spinlock,flags);
2546 info->idle_mode = idle_mode;
2547 usc_set_txidle( info );
2548 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2551 } /* end of mgsl_set_txidle() */
2555 * enable or disable the transmitter
2559 * info pointer to device instance data
2560 * enable 1 = enable, 0 = disable
2562 * Return Value: 0 if success, otherwise error code
2564 static int mgsl_txenable(struct mgsl_struct * info, int enable)
2566 unsigned long flags;
2568 if (debug_level >= DEBUG_LEVEL_INFO)
2569 printk("%s(%d):mgsl_txenable(%s,%d)\n", __FILE__,__LINE__,
2570 info->device_name, enable);
2572 spin_lock_irqsave(&info->irq_spinlock,flags);
2574 if ( !info->tx_enabled ) {
2576 usc_start_transmitter(info);
2577 /*--------------------------------------------------
2578 * if HDLC/SDLC Loop mode, attempt to insert the
2579 * station in the 'loop' by setting CMR:13. Upon
2580 * receipt of the next GoAhead (RxAbort) sequence,
2581 * the OnLoop indicator (CCSR:7) should go active
2582 * to indicate that we are on the loop
2583 *--------------------------------------------------*/
2584 if ( info->params.flags & HDLC_FLAG_HDLC_LOOPMODE )
2585 usc_loopmode_insert_request( info );
2588 if ( info->tx_enabled )
2589 usc_stop_transmitter(info);
2591 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2594 } /* end of mgsl_txenable() */
2596 /* mgsl_txabort() abort send HDLC frame
2598 * Arguments: info pointer to device instance data
2599 * Return Value: 0 if success, otherwise error code
2601 static int mgsl_txabort(struct mgsl_struct * info)
2603 unsigned long flags;
2605 if (debug_level >= DEBUG_LEVEL_INFO)
2606 printk("%s(%d):mgsl_txabort(%s)\n", __FILE__,__LINE__,
2609 spin_lock_irqsave(&info->irq_spinlock,flags);
2610 if ( info->tx_active && info->params.mode == MGSL_MODE_HDLC )
2612 if ( info->params.flags & HDLC_FLAG_HDLC_LOOPMODE )
2613 usc_loopmode_cancel_transmit( info );
2615 usc_TCmd(info,TCmd_SendAbort);
2617 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2620 } /* end of mgsl_txabort() */
2622 /* mgsl_rxenable() enable or disable the receiver
2624 * Arguments: info pointer to device instance data
2625 * enable 1 = enable, 0 = disable
2626 * Return Value: 0 if success, otherwise error code
2628 static int mgsl_rxenable(struct mgsl_struct * info, int enable)
2630 unsigned long flags;
2632 if (debug_level >= DEBUG_LEVEL_INFO)
2633 printk("%s(%d):mgsl_rxenable(%s,%d)\n", __FILE__,__LINE__,
2634 info->device_name, enable);
2636 spin_lock_irqsave(&info->irq_spinlock,flags);
2638 if ( !info->rx_enabled )
2639 usc_start_receiver(info);
2641 if ( info->rx_enabled )
2642 usc_stop_receiver(info);
2644 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2647 } /* end of mgsl_rxenable() */
2649 /* mgsl_wait_event() wait for specified event to occur
2651 * Arguments: info pointer to device instance data
2652 * mask pointer to bitmask of events to wait for
2653 * Return Value: 0 if successful and bit mask updated with
2654 * of events triggerred,
2655 * otherwise error code
2657 static int mgsl_wait_event(struct mgsl_struct * info, int __user * mask_ptr)
2659 unsigned long flags;
2662 struct mgsl_icount cprev, cnow;
2665 struct _input_signal_events oldsigs, newsigs;
2666 DECLARE_WAITQUEUE(wait, current);
2668 COPY_FROM_USER(rc,&mask, mask_ptr, sizeof(int));
2673 if (debug_level >= DEBUG_LEVEL_INFO)
2674 printk("%s(%d):mgsl_wait_event(%s,%d)\n", __FILE__,__LINE__,
2675 info->device_name, mask);
2677 spin_lock_irqsave(&info->irq_spinlock,flags);
2679 /* return immediately if state matches requested events */
2680 usc_get_serial_signals(info);
2681 s = info->serial_signals;
2683 ( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) +
2684 ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) +
2685 ((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) +
2686 ((s & SerialSignal_RI) ? MgslEvent_RiActive :MgslEvent_RiInactive) );
2688 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2692 /* save current irq counts */
2693 cprev = info->icount;
2694 oldsigs = info->input_signal_events;
2696 /* enable hunt and idle irqs if needed */
2697 if (mask & (MgslEvent_ExitHuntMode + MgslEvent_IdleReceived)) {
2698 u16 oldreg = usc_InReg(info,RICR);
2699 u16 newreg = oldreg +
2700 (mask & MgslEvent_ExitHuntMode ? RXSTATUS_EXITED_HUNT:0) +
2701 (mask & MgslEvent_IdleReceived ? RXSTATUS_IDLE_RECEIVED:0);
2702 if (oldreg != newreg)
2703 usc_OutReg(info, RICR, newreg);
2706 set_current_state(TASK_INTERRUPTIBLE);
2707 add_wait_queue(&info->event_wait_q, &wait);
2709 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2714 if (signal_pending(current)) {
2719 /* get current irq counts */
2720 spin_lock_irqsave(&info->irq_spinlock,flags);
2721 cnow = info->icount;
2722 newsigs = info->input_signal_events;
2723 set_current_state(TASK_INTERRUPTIBLE);
2724 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2726 /* if no change, wait aborted for some reason */
2727 if (newsigs.dsr_up == oldsigs.dsr_up &&
2728 newsigs.dsr_down == oldsigs.dsr_down &&
2729 newsigs.dcd_up == oldsigs.dcd_up &&
2730 newsigs.dcd_down == oldsigs.dcd_down &&
2731 newsigs.cts_up == oldsigs.cts_up &&
2732 newsigs.cts_down == oldsigs.cts_down &&
2733 newsigs.ri_up == oldsigs.ri_up &&
2734 newsigs.ri_down == oldsigs.ri_down &&
2735 cnow.exithunt == cprev.exithunt &&
2736 cnow.rxidle == cprev.rxidle) {
2742 ( (newsigs.dsr_up != oldsigs.dsr_up ? MgslEvent_DsrActive:0) +
2743 (newsigs.dsr_down != oldsigs.dsr_down ? MgslEvent_DsrInactive:0) +
2744 (newsigs.dcd_up != oldsigs.dcd_up ? MgslEvent_DcdActive:0) +
2745 (newsigs.dcd_down != oldsigs.dcd_down ? MgslEvent_DcdInactive:0) +
2746 (newsigs.cts_up != oldsigs.cts_up ? MgslEvent_CtsActive:0) +
2747 (newsigs.cts_down != oldsigs.cts_down ? MgslEvent_CtsInactive:0) +
2748 (newsigs.ri_up != oldsigs.ri_up ? MgslEvent_RiActive:0) +
2749 (newsigs.ri_down != oldsigs.ri_down ? MgslEvent_RiInactive:0) +
2750 (cnow.exithunt != cprev.exithunt ? MgslEvent_ExitHuntMode:0) +
2751 (cnow.rxidle != cprev.rxidle ? MgslEvent_IdleReceived:0) );
2759 remove_wait_queue(&info->event_wait_q, &wait);
2760 set_current_state(TASK_RUNNING);
2762 if (mask & (MgslEvent_ExitHuntMode + MgslEvent_IdleReceived)) {
2763 spin_lock_irqsave(&info->irq_spinlock,flags);
2764 if (!waitqueue_active(&info->event_wait_q)) {
2765 /* disable enable exit hunt mode/idle rcvd IRQs */
2766 usc_OutReg(info, RICR, usc_InReg(info,RICR) &
2767 ~(RXSTATUS_EXITED_HUNT | RXSTATUS_IDLE_RECEIVED));
2769 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2773 PUT_USER(rc, events, mask_ptr);
2777 } /* end of mgsl_wait_event() */
2779 static int modem_input_wait(struct mgsl_struct *info,int arg)
2781 unsigned long flags;
2783 struct mgsl_icount cprev, cnow;
2784 DECLARE_WAITQUEUE(wait, current);
2786 /* save current irq counts */
2787 spin_lock_irqsave(&info->irq_spinlock,flags);
2788 cprev = info->icount;
2789 add_wait_queue(&info->status_event_wait_q, &wait);
2790 set_current_state(TASK_INTERRUPTIBLE);
2791 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2795 if (signal_pending(current)) {
2800 /* get new irq counts */
2801 spin_lock_irqsave(&info->irq_spinlock,flags);
2802 cnow = info->icount;
2803 set_current_state(TASK_INTERRUPTIBLE);
2804 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2806 /* if no change, wait aborted for some reason */
2807 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2808 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
2813 /* check for change in caller specified modem input */
2814 if ((arg & TIOCM_RNG && cnow.rng != cprev.rng) ||
2815 (arg & TIOCM_DSR && cnow.dsr != cprev.dsr) ||
2816 (arg & TIOCM_CD && cnow.dcd != cprev.dcd) ||
2817 (arg & TIOCM_CTS && cnow.cts != cprev.cts)) {
2824 remove_wait_queue(&info->status_event_wait_q, &wait);
2825 set_current_state(TASK_RUNNING);
2829 /* return the state of the serial control and status signals
2831 static int tiocmget(struct tty_struct *tty)
2833 struct mgsl_struct *info = tty->driver_data;
2834 unsigned int result;
2835 unsigned long flags;
2837 spin_lock_irqsave(&info->irq_spinlock,flags);
2838 usc_get_serial_signals(info);
2839 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2841 result = ((info->serial_signals & SerialSignal_RTS) ? TIOCM_RTS:0) +
2842 ((info->serial_signals & SerialSignal_DTR) ? TIOCM_DTR:0) +
2843 ((info->serial_signals & SerialSignal_DCD) ? TIOCM_CAR:0) +
2844 ((info->serial_signals & SerialSignal_RI) ? TIOCM_RNG:0) +
2845 ((info->serial_signals & SerialSignal_DSR) ? TIOCM_DSR:0) +
2846 ((info->serial_signals & SerialSignal_CTS) ? TIOCM_CTS:0);
2848 if (debug_level >= DEBUG_LEVEL_INFO)
2849 printk("%s(%d):%s tiocmget() value=%08X\n",
2850 __FILE__,__LINE__, info->device_name, result );
2854 /* set modem control signals (DTR/RTS)
2856 static int tiocmset(struct tty_struct *tty,
2857 unsigned int set, unsigned int clear)
2859 struct mgsl_struct *info = tty->driver_data;
2860 unsigned long flags;
2862 if (debug_level >= DEBUG_LEVEL_INFO)
2863 printk("%s(%d):%s tiocmset(%x,%x)\n",
2864 __FILE__,__LINE__,info->device_name, set, clear);
2866 if (set & TIOCM_RTS)
2867 info->serial_signals |= SerialSignal_RTS;
2868 if (set & TIOCM_DTR)
2869 info->serial_signals |= SerialSignal_DTR;
2870 if (clear & TIOCM_RTS)
2871 info->serial_signals &= ~SerialSignal_RTS;
2872 if (clear & TIOCM_DTR)
2873 info->serial_signals &= ~SerialSignal_DTR;
2875 spin_lock_irqsave(&info->irq_spinlock,flags);
2876 usc_set_serial_signals(info);
2877 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2882 /* mgsl_break() Set or clear transmit break condition
2884 * Arguments: tty pointer to tty instance data
2885 * break_state -1=set break condition, 0=clear
2886 * Return Value: error code
2888 static int mgsl_break(struct tty_struct *tty, int break_state)
2890 struct mgsl_struct * info = tty->driver_data;
2891 unsigned long flags;
2893 if (debug_level >= DEBUG_LEVEL_INFO)
2894 printk("%s(%d):mgsl_break(%s,%d)\n",
2895 __FILE__,__LINE__, info->device_name, break_state);
2897 if (mgsl_paranoia_check(info, tty->name, "mgsl_break"))
2900 spin_lock_irqsave(&info->irq_spinlock,flags);
2901 if (break_state == -1)
2902 usc_OutReg(info,IOCR,(u16)(usc_InReg(info,IOCR) | BIT7));
2904 usc_OutReg(info,IOCR,(u16)(usc_InReg(info,IOCR) & ~BIT7));
2905 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2908 } /* end of mgsl_break() */
2911 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
2912 * Return: write counters to the user passed counter struct
2913 * NB: both 1->0 and 0->1 transitions are counted except for
2914 * RI where only 0->1 is counted.
2916 static int msgl_get_icount(struct tty_struct *tty,
2917 struct serial_icounter_struct *icount)
2920 struct mgsl_struct * info = tty->driver_data;
2921 struct mgsl_icount cnow; /* kernel counter temps */
2922 unsigned long flags;
2924 spin_lock_irqsave(&info->irq_spinlock,flags);
2925 cnow = info->icount;
2926 spin_unlock_irqrestore(&info->irq_spinlock,flags);
2928 icount->cts = cnow.cts;
2929 icount->dsr = cnow.dsr;
2930 icount->rng = cnow.rng;
2931 icount->dcd = cnow.dcd;
2932 icount->rx = cnow.rx;
2933 icount->tx = cnow.tx;
2934 icount->frame = cnow.frame;
2935 icount->overrun = cnow.overrun;
2936 icount->parity = cnow.parity;
2937 icount->brk = cnow.brk;
2938 icount->buf_overrun = cnow.buf_overrun;
2942 /* mgsl_ioctl() Service an IOCTL request
2946 * tty pointer to tty instance data
2947 * cmd IOCTL command code
2948 * arg command argument/context
2950 * Return Value: 0 if success, otherwise error code
2952 static int mgsl_ioctl(struct tty_struct *tty,
2953 unsigned int cmd, unsigned long arg)
2955 struct mgsl_struct * info = tty->driver_data;
2957 if (debug_level >= DEBUG_LEVEL_INFO)
2958 printk("%s(%d):mgsl_ioctl %s cmd=%08X\n", __FILE__,__LINE__,
2959 info->device_name, cmd );
2961 if (mgsl_paranoia_check(info, tty->name, "mgsl_ioctl"))
2964 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
2965 (cmd != TIOCMIWAIT)) {
2966 if (tty_io_error(tty))
2970 return mgsl_ioctl_common(info, cmd, arg);
2973 static int mgsl_ioctl_common(struct mgsl_struct *info, unsigned int cmd, unsigned long arg)
2975 void __user *argp = (void __user *)arg;
2978 case MGSL_IOCGPARAMS:
2979 return mgsl_get_params(info, argp);
2980 case MGSL_IOCSPARAMS:
2981 return mgsl_set_params(info, argp);
2982 case MGSL_IOCGTXIDLE:
2983 return mgsl_get_txidle(info, argp);
2984 case MGSL_IOCSTXIDLE:
2985 return mgsl_set_txidle(info,(int)arg);
2986 case MGSL_IOCTXENABLE:
2987 return mgsl_txenable(info,(int)arg);
2988 case MGSL_IOCRXENABLE:
2989 return mgsl_rxenable(info,(int)arg);
2990 case MGSL_IOCTXABORT:
2991 return mgsl_txabort(info);
2992 case MGSL_IOCGSTATS:
2993 return mgsl_get_stats(info, argp);
2994 case MGSL_IOCWAITEVENT:
2995 return mgsl_wait_event(info, argp);
2996 case MGSL_IOCLOOPTXDONE:
2997 return mgsl_loopmode_send_done(info);
2998 /* Wait for modem input (DCD,RI,DSR,CTS) change
2999 * as specified by mask in arg (TIOCM_RNG/DSR/CD/CTS)
3002 return modem_input_wait(info,(int)arg);
3005 return -ENOIOCTLCMD;
3010 /* mgsl_set_termios()
3012 * Set new termios settings
3016 * tty pointer to tty structure
3017 * termios pointer to buffer to hold returned old termios
3019 * Return Value: None
3021 static void mgsl_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
3023 struct mgsl_struct *info = tty->driver_data;
3024 unsigned long flags;
3026 if (debug_level >= DEBUG_LEVEL_INFO)
3027 printk("%s(%d):mgsl_set_termios %s\n", __FILE__,__LINE__,
3028 tty->driver->name );
3030 mgsl_change_params(info);
3032 /* Handle transition to B0 status */
3033 if ((old_termios->c_cflag & CBAUD) && !C_BAUD(tty)) {
3034 info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
3035 spin_lock_irqsave(&info->irq_spinlock,flags);
3036 usc_set_serial_signals(info);
3037 spin_unlock_irqrestore(&info->irq_spinlock,flags);
3040 /* Handle transition away from B0 status */
3041 if (!(old_termios->c_cflag & CBAUD) && C_BAUD(tty)) {
3042 info->serial_signals |= SerialSignal_DTR;
3043 if (!C_CRTSCTS(tty) || !tty_throttled(tty))
3044 info->serial_signals |= SerialSignal_RTS;
3045 spin_lock_irqsave(&info->irq_spinlock,flags);
3046 usc_set_serial_signals(info);
3047 spin_unlock_irqrestore(&info->irq_spinlock,flags);
3050 /* Handle turning off CRTSCTS */
3051 if (old_termios->c_cflag & CRTSCTS && !C_CRTSCTS(tty)) {
3052 tty->hw_stopped = 0;
3056 } /* end of mgsl_set_termios() */
3060 * Called when port is closed. Wait for remaining data to be
3061 * sent. Disable port and free resources.
3065 * tty pointer to open tty structure
3066 * filp pointer to open file object
3068 * Return Value: None
3070 static void mgsl_close(struct tty_struct *tty, struct file * filp)
3072 struct mgsl_struct * info = tty->driver_data;
3074 if (mgsl_paranoia_check(info, tty->name, "mgsl_close"))
3077 if (debug_level >= DEBUG_LEVEL_INFO)
3078 printk("%s(%d):mgsl_close(%s) entry, count=%d\n",
3079 __FILE__,__LINE__, info->device_name, info->port.count);
3081 if (tty_port_close_start(&info->port, tty, filp) == 0)
3084 mutex_lock(&info->port.mutex);
3085 if (tty_port_initialized(&info->port))
3086 mgsl_wait_until_sent(tty, info->timeout);
3087 mgsl_flush_buffer(tty);
3088 tty_ldisc_flush(tty);
3090 mutex_unlock(&info->port.mutex);
3092 tty_port_close_end(&info->port, tty);
3093 info->port.tty = NULL;
3095 if (debug_level >= DEBUG_LEVEL_INFO)
3096 printk("%s(%d):mgsl_close(%s) exit, count=%d\n", __FILE__,__LINE__,
3097 tty->driver->name, info->port.count);
3099 } /* end of mgsl_close() */
3101 /* mgsl_wait_until_sent()
3103 * Wait until the transmitter is empty.
3107 * tty pointer to tty info structure
3108 * timeout time to wait for send completion
3110 * Return Value: None
3112 static void mgsl_wait_until_sent(struct tty_struct *tty, int timeout)
3114 struct mgsl_struct * info = tty->driver_data;
3115 unsigned long orig_jiffies, char_time;
3120 if (debug_level >= DEBUG_LEVEL_INFO)
3121 printk("%s(%d):mgsl_wait_until_sent(%s) entry\n",
3122 __FILE__,__LINE__, info->device_name );
3124 if (mgsl_paranoia_check(info, tty->name, "mgsl_wait_until_sent"))
3127 if (!tty_port_initialized(&info->port))
3130 orig_jiffies = jiffies;
3132 /* Set check interval to 1/5 of estimated time to
3133 * send a character, and make it at least 1. The check
3134 * interval should also be less than the timeout.
3135 * Note: use tight timings here to satisfy the NIST-PCTS.
3138 if ( info->params.data_rate ) {
3139 char_time = info->timeout/(32 * 5);
3146 char_time = min_t(unsigned long, char_time, timeout);
3148 if ( info->params.mode == MGSL_MODE_HDLC ||
3149 info->params.mode == MGSL_MODE_RAW ) {
3150 while (info->tx_active) {
3151 msleep_interruptible(jiffies_to_msecs(char_time));
3152 if (signal_pending(current))
3154 if (timeout && time_after(jiffies, orig_jiffies + timeout))
3158 while (!(usc_InReg(info,TCSR) & TXSTATUS_ALL_SENT) &&
3160 msleep_interruptible(jiffies_to_msecs(char_time));
3161 if (signal_pending(current))
3163 if (timeout && time_after(jiffies, orig_jiffies + timeout))
3169 if (debug_level >= DEBUG_LEVEL_INFO)
3170 printk("%s(%d):mgsl_wait_until_sent(%s) exit\n",
3171 __FILE__,__LINE__, info->device_name );
3173 } /* end of mgsl_wait_until_sent() */
3177 * Called by tty_hangup() when a hangup is signaled.
3178 * This is the same as to closing all open files for the port.
3180 * Arguments: tty pointer to associated tty object
3181 * Return Value: None
3183 static void mgsl_hangup(struct tty_struct *tty)
3185 struct mgsl_struct * info = tty->driver_data;
3187 if (debug_level >= DEBUG_LEVEL_INFO)
3188 printk("%s(%d):mgsl_hangup(%s)\n",
3189 __FILE__,__LINE__, info->device_name );
3191 if (mgsl_paranoia_check(info, tty->name, "mgsl_hangup"))
3194 mgsl_flush_buffer(tty);
3197 info->port.count = 0;
3198 tty_port_set_active(&info->port, 0);
3199 info->port.tty = NULL;
3201 wake_up_interruptible(&info->port.open_wait);
3203 } /* end of mgsl_hangup() */
3208 * Return true if carrier is raised
3211 static int carrier_raised(struct tty_port *port)
3213 unsigned long flags;
3214 struct mgsl_struct *info = container_of(port, struct mgsl_struct, port);
3216 spin_lock_irqsave(&info->irq_spinlock, flags);
3217 usc_get_serial_signals(info);
3218 spin_unlock_irqrestore(&info->irq_spinlock, flags);
3219 return (info->serial_signals & SerialSignal_DCD) ? 1 : 0;
3222 static void dtr_rts(struct tty_port *port, int on)
3224 struct mgsl_struct *info = container_of(port, struct mgsl_struct, port);
3225 unsigned long flags;
3227 spin_lock_irqsave(&info->irq_spinlock,flags);
3229 info->serial_signals |= SerialSignal_RTS | SerialSignal_DTR;
3231 info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
3232 usc_set_serial_signals(info);
3233 spin_unlock_irqrestore(&info->irq_spinlock,flags);
3237 /* block_til_ready()
3239 * Block the current process until the specified port
3240 * is ready to be opened.
3244 * tty pointer to tty info structure
3245 * filp pointer to open file object
3246 * info pointer to device instance data
3248 * Return Value: 0 if success, otherwise error code
3250 static int block_til_ready(struct tty_struct *tty, struct file * filp,
3251 struct mgsl_struct *info)
3253 DECLARE_WAITQUEUE(wait, current);
3255 bool do_clocal = false;
3256 unsigned long flags;
3258 struct tty_port *port = &info->port;
3260 if (debug_level >= DEBUG_LEVEL_INFO)
3261 printk("%s(%d):block_til_ready on %s\n",
3262 __FILE__,__LINE__, tty->driver->name );
3264 if (filp->f_flags & O_NONBLOCK || tty_io_error(tty)) {
3265 /* nonblock mode is set or port is not enabled */
3266 tty_port_set_active(port, 1);
3273 /* Wait for carrier detect and the line to become
3274 * free (i.e., not in use by the callout). While we are in
3275 * this loop, port->count is dropped by one, so that
3276 * mgsl_close() knows when to free things. We restore it upon
3277 * exit, either normal or abnormal.
3281 add_wait_queue(&port->open_wait, &wait);
3283 if (debug_level >= DEBUG_LEVEL_INFO)
3284 printk("%s(%d):block_til_ready before block on %s count=%d\n",
3285 __FILE__,__LINE__, tty->driver->name, port->count );
3287 spin_lock_irqsave(&info->irq_spinlock, flags);
3289 spin_unlock_irqrestore(&info->irq_spinlock, flags);
3290 port->blocked_open++;
3293 if (C_BAUD(tty) && tty_port_initialized(port))
3294 tty_port_raise_dtr_rts(port);
3296 set_current_state(TASK_INTERRUPTIBLE);
3298 if (tty_hung_up_p(filp) || !tty_port_initialized(port)) {
3299 retval = (port->flags & ASYNC_HUP_NOTIFY) ?
3300 -EAGAIN : -ERESTARTSYS;
3304 dcd = tty_port_carrier_raised(&info->port);
3305 if (do_clocal || dcd)
3308 if (signal_pending(current)) {
3309 retval = -ERESTARTSYS;
3313 if (debug_level >= DEBUG_LEVEL_INFO)
3314 printk("%s(%d):block_til_ready blocking on %s count=%d\n",
3315 __FILE__,__LINE__, tty->driver->name, port->count );
3322 set_current_state(TASK_RUNNING);
3323 remove_wait_queue(&port->open_wait, &wait);
3325 /* FIXME: Racy on hangup during close wait */
3326 if (!tty_hung_up_p(filp))
3328 port->blocked_open--;
3330 if (debug_level >= DEBUG_LEVEL_INFO)
3331 printk("%s(%d):block_til_ready after blocking on %s count=%d\n",
3332 __FILE__,__LINE__, tty->driver->name, port->count );
3335 tty_port_set_active(port, 1);
3339 } /* end of block_til_ready() */
3341 static int mgsl_install(struct tty_driver *driver, struct tty_struct *tty)
3343 struct mgsl_struct *info;
3344 int line = tty->index;
3346 /* verify range of specified line number */
3347 if (line >= mgsl_device_count) {
3348 printk("%s(%d):mgsl_open with invalid line #%d.\n",
3349 __FILE__, __LINE__, line);
3353 /* find the info structure for the specified line */
3354 info = mgsl_device_list;
3355 while (info && info->line != line)
3356 info = info->next_device;
3357 if (mgsl_paranoia_check(info, tty->name, "mgsl_open"))
3359 tty->driver_data = info;
3361 return tty_port_install(&info->port, driver, tty);
3366 * Called when a port is opened. Init and enable port.
3367 * Perform serial-specific initialization for the tty structure.
3369 * Arguments: tty pointer to tty info structure
3370 * filp associated file pointer
3372 * Return Value: 0 if success, otherwise error code
3374 static int mgsl_open(struct tty_struct *tty, struct file * filp)
3376 struct mgsl_struct *info = tty->driver_data;
3377 unsigned long flags;
3380 info->port.tty = tty;
3382 if (debug_level >= DEBUG_LEVEL_INFO)
3383 printk("%s(%d):mgsl_open(%s), old ref count = %d\n",
3384 __FILE__,__LINE__,tty->driver->name, info->port.count);
3386 info->port.low_latency = (info->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0;
3388 spin_lock_irqsave(&info->netlock, flags);
3389 if (info->netcount) {
3391 spin_unlock_irqrestore(&info->netlock, flags);
3395 spin_unlock_irqrestore(&info->netlock, flags);
3397 if (info->port.count == 1) {
3398 /* 1st open on this device, init hardware */
3399 retval = startup(info);
3404 retval = block_til_ready(tty, filp, info);
3406 if (debug_level >= DEBUG_LEVEL_INFO)
3407 printk("%s(%d):block_til_ready(%s) returned %d\n",
3408 __FILE__,__LINE__, info->device_name, retval);
3412 if (debug_level >= DEBUG_LEVEL_INFO)
3413 printk("%s(%d):mgsl_open(%s) success\n",
3414 __FILE__,__LINE__, info->device_name);
3419 if (tty->count == 1)
3420 info->port.tty = NULL; /* tty layer will release tty struct */
3421 if(info->port.count)
3427 } /* end of mgsl_open() */
3430 * /proc fs routines....
3433 static inline void line_info(struct seq_file *m, struct mgsl_struct *info)
3436 unsigned long flags;
3438 if (info->bus_type == MGSL_BUS_TYPE_PCI) {
3439 seq_printf(m, "%s:PCI io:%04X irq:%d mem:%08X lcr:%08X",
3440 info->device_name, info->io_base, info->irq_level,
3441 info->phys_memory_base, info->phys_lcr_base);
3443 seq_printf(m, "%s:(E)ISA io:%04X irq:%d dma:%d",
3444 info->device_name, info->io_base,
3445 info->irq_level, info->dma_level);
3448 /* output current serial signal states */
3449 spin_lock_irqsave(&info->irq_spinlock,flags);
3450 usc_get_serial_signals(info);
3451 spin_unlock_irqrestore(&info->irq_spinlock,flags);
3455 if (info->serial_signals & SerialSignal_RTS)
3456 strcat(stat_buf, "|RTS");
3457 if (info->serial_signals & SerialSignal_CTS)
3458 strcat(stat_buf, "|CTS");
3459 if (info->serial_signals & SerialSignal_DTR)
3460 strcat(stat_buf, "|DTR");
3461 if (info->serial_signals & SerialSignal_DSR)
3462 strcat(stat_buf, "|DSR");
3463 if (info->serial_signals & SerialSignal_DCD)
3464 strcat(stat_buf, "|CD");
3465 if (info->serial_signals & SerialSignal_RI)
3466 strcat(stat_buf, "|RI");
3468 if (info->params.mode == MGSL_MODE_HDLC ||
3469 info->params.mode == MGSL_MODE_RAW ) {
3470 seq_printf(m, " HDLC txok:%d rxok:%d",
3471 info->icount.txok, info->icount.rxok);
3472 if (info->icount.txunder)
3473 seq_printf(m, " txunder:%d", info->icount.txunder);
3474 if (info->icount.txabort)
3475 seq_printf(m, " txabort:%d", info->icount.txabort);
3476 if (info->icount.rxshort)
3477 seq_printf(m, " rxshort:%d", info->icount.rxshort);
3478 if (info->icount.rxlong)
3479 seq_printf(m, " rxlong:%d", info->icount.rxlong);
3480 if (info->icount.rxover)
3481 seq_printf(m, " rxover:%d", info->icount.rxover);
3482 if (info->icount.rxcrc)
3483 seq_printf(m, " rxcrc:%d", info->icount.rxcrc);
3485 seq_printf(m, " ASYNC tx:%d rx:%d",
3486 info->icount.tx, info->icount.rx);
3487 if (info->icount.frame)
3488 seq_printf(m, " fe:%d", info->icount.frame);
3489 if (info->icount.parity)
3490 seq_printf(m, " pe:%d", info->icount.parity);
3491 if (info->icount.brk)
3492 seq_printf(m, " brk:%d", info->icount.brk);
3493 if (info->icount.overrun)
3494 seq_printf(m, " oe:%d", info->icount.overrun);
3497 /* Append serial signal status to end */
3498 seq_printf(m, " %s\n", stat_buf+1);
3500 seq_printf(m, "txactive=%d bh_req=%d bh_run=%d pending_bh=%x\n",
3501 info->tx_active,info->bh_requested,info->bh_running,
3504 spin_lock_irqsave(&info->irq_spinlock,flags);
3506 u16 Tcsr = usc_InReg( info, TCSR );
3507 u16 Tdmr = usc_InDmaReg( info, TDMR );
3508 u16 Ticr = usc_InReg( info, TICR );
3509 u16 Rscr = usc_InReg( info, RCSR );
3510 u16 Rdmr = usc_InDmaReg( info, RDMR );
3511 u16 Ricr = usc_InReg( info, RICR );
3512 u16 Icr = usc_InReg( info, ICR );
3513 u16 Dccr = usc_InReg( info, DCCR );
3514 u16 Tmr = usc_InReg( info, TMR );
3515 u16 Tccr = usc_InReg( info, TCCR );
3516 u16 Ccar = inw( info->io_base + CCAR );
3517 seq_printf(m, "tcsr=%04X tdmr=%04X ticr=%04X rcsr=%04X rdmr=%04X\n"
3518 "ricr=%04X icr =%04X dccr=%04X tmr=%04X tccr=%04X ccar=%04X\n",
3519 Tcsr,Tdmr,Ticr,Rscr,Rdmr,Ricr,Icr,Dccr,Tmr,Tccr,Ccar );
3521 spin_unlock_irqrestore(&info->irq_spinlock,flags);
3524 /* Called to print information about devices */
3525 static int mgsl_proc_show(struct seq_file *m, void *v)
3527 struct mgsl_struct *info;
3529 seq_printf(m, "synclink driver:%s\n", driver_version);
3531 info = mgsl_device_list;
3534 info = info->next_device;
3539 static int mgsl_proc_open(struct inode *inode, struct file *file)
3541 return single_open(file, mgsl_proc_show, NULL);
3544 static const struct file_operations mgsl_proc_fops = {
3545 .owner = THIS_MODULE,
3546 .open = mgsl_proc_open,
3548 .llseek = seq_lseek,
3549 .release = single_release,
3552 /* mgsl_allocate_dma_buffers()
3554 * Allocate and format DMA buffers (ISA adapter)
3555 * or format shared memory buffers (PCI adapter).
3557 * Arguments: info pointer to device instance data
3558 * Return Value: 0 if success, otherwise error
3560 static int mgsl_allocate_dma_buffers(struct mgsl_struct *info)
3562 unsigned short BuffersPerFrame;
3564 info->last_mem_alloc = 0;
3566 /* Calculate the number of DMA buffers necessary to hold the */
3567 /* largest allowable frame size. Note: If the max frame size is */
3568 /* not an even multiple of the DMA buffer size then we need to */
3569 /* round the buffer count per frame up one. */
3571 BuffersPerFrame = (unsigned short)(info->max_frame_size/DMABUFFERSIZE);
3572 if ( info->max_frame_size % DMABUFFERSIZE )
3575 if ( info->bus_type == MGSL_BUS_TYPE_PCI ) {
3577 * The PCI adapter has 256KBytes of shared memory to use.
3578 * This is 64 PAGE_SIZE buffers.
3580 * The first page is used for padding at this time so the
3581 * buffer list does not begin at offset 0 of the PCI
3582 * adapter's shared memory.
3584 * The 2nd page is used for the buffer list. A 4K buffer
3585 * list can hold 128 DMA_BUFFER structures at 32 bytes
3588 * This leaves 62 4K pages.
3590 * The next N pages are used for transmit frame(s). We
3591 * reserve enough 4K page blocks to hold the required
3592 * number of transmit dma buffers (num_tx_dma_buffers),
3593 * each of MaxFrameSize size.
3595 * Of the remaining pages (62-N), determine how many can
3596 * be used to receive full MaxFrameSize inbound frames
3598 info->tx_buffer_count = info->num_tx_dma_buffers * BuffersPerFrame;
3599 info->rx_buffer_count = 62 - info->tx_buffer_count;
3601 /* Calculate the number of PAGE_SIZE buffers needed for */
3602 /* receive and transmit DMA buffers. */
3605 /* Calculate the number of DMA buffers necessary to */
3606 /* hold 7 max size receive frames and one max size transmit frame. */
3607 /* The receive buffer count is bumped by one so we avoid an */
3608 /* End of List condition if all receive buffers are used when */
3609 /* using linked list DMA buffers. */
3611 info->tx_buffer_count = info->num_tx_dma_buffers * BuffersPerFrame;
3612 info->rx_buffer_count = (BuffersPerFrame * MAXRXFRAMES) + 6;
3615 * limit total TxBuffers & RxBuffers to 62 4K total
3616 * (ala PCI Allocation)
3619 if ( (info->tx_buffer_count + info->rx_buffer_count) > 62 )
3620 info->rx_buffer_count = 62 - info->tx_buffer_count;
3624 if ( debug_level >= DEBUG_LEVEL_INFO )
3625 printk("%s(%d):Allocating %d TX and %d RX DMA buffers.\n",
3626 __FILE__,__LINE__, info->tx_buffer_count,info->rx_buffer_count);
3628 if ( mgsl_alloc_buffer_list_memory( info ) < 0 ||
3629 mgsl_alloc_frame_memory(info, info->rx_buffer_list, info->rx_buffer_count) < 0 ||
3630 mgsl_alloc_frame_memory(info, info->tx_buffer_list, info->tx_buffer_count) < 0 ||
3631 mgsl_alloc_intermediate_rxbuffer_memory(info) < 0 ||
3632 mgsl_alloc_intermediate_txbuffer_memory(info) < 0 ) {
3633 printk("%s(%d):Can't allocate DMA buffer memory\n",__FILE__,__LINE__);
3637 mgsl_reset_rx_dma_buffers( info );
3638 mgsl_reset_tx_dma_buffers( info );
3642 } /* end of mgsl_allocate_dma_buffers() */
3645 * mgsl_alloc_buffer_list_memory()
3647 * Allocate a common DMA buffer for use as the
3648 * receive and transmit buffer lists.
3650 * A buffer list is a set of buffer entries where each entry contains
3651 * a pointer to an actual buffer and a pointer to the next buffer entry
3652 * (plus some other info about the buffer).
3654 * The buffer entries for a list are built to form a circular list so
3655 * that when the entire list has been traversed you start back at the
3658 * This function allocates memory for just the buffer entries.
3659 * The links (pointer to next entry) are filled in with the physical
3660 * address of the next entry so the adapter can navigate the list
3661 * using bus master DMA. The pointers to the actual buffers are filled
3662 * out later when the actual buffers are allocated.
3664 * Arguments: info pointer to device instance data
3665 * Return Value: 0 if success, otherwise error
3667 static int mgsl_alloc_buffer_list_memory( struct mgsl_struct *info )
3671 if ( info->bus_type == MGSL_BUS_TYPE_PCI ) {
3672 /* PCI adapter uses shared memory. */
3673 info->buffer_list = info->memory_base + info->last_mem_alloc;
3674 info->buffer_list_phys = info->last_mem_alloc;
3675 info->last_mem_alloc += BUFFERLISTSIZE;
3677 /* ISA adapter uses system memory. */
3678 /* The buffer lists are allocated as a common buffer that both */
3679 /* the processor and adapter can access. This allows the driver to */
3680 /* inspect portions of the buffer while other portions are being */
3681 /* updated by the adapter using Bus Master DMA. */
3683 info->buffer_list = dma_alloc_coherent(NULL, BUFFERLISTSIZE, &info->buffer_list_dma_addr, GFP_KERNEL);
3684 if (info->buffer_list == NULL)
3686 info->buffer_list_phys = (u32)(info->buffer_list_dma_addr);
3689 /* We got the memory for the buffer entry lists. */
3690 /* Initialize the memory block to all zeros. */
3691 memset( info->buffer_list, 0, BUFFERLISTSIZE );
3693 /* Save virtual address pointers to the receive and */
3694 /* transmit buffer lists. (Receive 1st). These pointers will */
3695 /* be used by the processor to access the lists. */
3696 info->rx_buffer_list = (DMABUFFERENTRY *)info->buffer_list;
3697 info->tx_buffer_list = (DMABUFFERENTRY *)info->buffer_list;
3698 info->tx_buffer_list += info->rx_buffer_count;
3701 * Build the links for the buffer entry lists such that
3702 * two circular lists are built. (Transmit and Receive).
3704 * Note: the links are physical addresses
3705 * which are read by the adapter to determine the next
3706 * buffer entry to use.
3709 for ( i = 0; i < info->rx_buffer_count; i++ ) {
3710 /* calculate and store physical address of this buffer entry */
3711 info->rx_buffer_list[i].phys_entry =
3712 info->buffer_list_phys + (i * sizeof(DMABUFFERENTRY));
3714 /* calculate and store physical address of */
3715 /* next entry in cirular list of entries */
3717 info->rx_buffer_list[i].link = info->buffer_list_phys;
3719 if ( i < info->rx_buffer_count - 1 )
3720 info->rx_buffer_list[i].link += (i + 1) * sizeof(DMABUFFERENTRY);
3723 for ( i = 0; i < info->tx_buffer_count; i++ ) {
3724 /* calculate and store physical address of this buffer entry */
3725 info->tx_buffer_list[i].phys_entry = info->buffer_list_phys +
3726 ((info->rx_buffer_count + i) * sizeof(DMABUFFERENTRY));
3728 /* calculate and store physical address of */
3729 /* next entry in cirular list of entries */
3731 info->tx_buffer_list[i].link = info->buffer_list_phys +
3732 info->rx_buffer_count * sizeof(DMABUFFERENTRY);
3734 if ( i < info->tx_buffer_count - 1 )
3735 info->tx_buffer_list[i].link += (i + 1) * sizeof(DMABUFFERENTRY);
3740 } /* end of mgsl_alloc_buffer_list_memory() */
3742 /* Free DMA buffers allocated for use as the
3743 * receive and transmit buffer lists.
3746 * The data transfer buffers associated with the buffer list
3747 * MUST be freed before freeing the buffer list itself because
3748 * the buffer list contains the information necessary to free
3749 * the individual buffers!
3751 static void mgsl_free_buffer_list_memory( struct mgsl_struct *info )
3753 if (info->buffer_list && info->bus_type != MGSL_BUS_TYPE_PCI)
3754 dma_free_coherent(NULL, BUFFERLISTSIZE, info->buffer_list, info->buffer_list_dma_addr);
3756 info->buffer_list = NULL;
3757 info->rx_buffer_list = NULL;
3758 info->tx_buffer_list = NULL;
3760 } /* end of mgsl_free_buffer_list_memory() */
3763 * mgsl_alloc_frame_memory()
3765 * Allocate the frame DMA buffers used by the specified buffer list.
3766 * Each DMA buffer will be one memory page in size. This is necessary
3767 * because memory can fragment enough that it may be impossible
3772 * info pointer to device instance data
3773 * BufferList pointer to list of buffer entries
3774 * Buffercount count of buffer entries in buffer list
3776 * Return Value: 0 if success, otherwise -ENOMEM
3778 static int mgsl_alloc_frame_memory(struct mgsl_struct *info,DMABUFFERENTRY *BufferList,int Buffercount)
3783 /* Allocate page sized buffers for the receive buffer list */
3785 for ( i = 0; i < Buffercount; i++ ) {
3786 if ( info->bus_type == MGSL_BUS_TYPE_PCI ) {
3787 /* PCI adapter uses shared memory buffers. */
3788 BufferList[i].virt_addr = info->memory_base + info->last_mem_alloc;
3789 phys_addr = info->last_mem_alloc;
3790 info->last_mem_alloc += DMABUFFERSIZE;
3792 /* ISA adapter uses system memory. */
3793 BufferList[i].virt_addr = dma_alloc_coherent(NULL, DMABUFFERSIZE, &BufferList[i].dma_addr, GFP_KERNEL);
3794 if (BufferList[i].virt_addr == NULL)
3796 phys_addr = (u32)(BufferList[i].dma_addr);
3798 BufferList[i].phys_addr = phys_addr;
3803 } /* end of mgsl_alloc_frame_memory() */
3806 * mgsl_free_frame_memory()
3808 * Free the buffers associated with
3809 * each buffer entry of a buffer list.
3813 * info pointer to device instance data
3814 * BufferList pointer to list of buffer entries
3815 * Buffercount count of buffer entries in buffer list
3817 * Return Value: None
3819 static void mgsl_free_frame_memory(struct mgsl_struct *info, DMABUFFERENTRY *BufferList, int Buffercount)
3824 for ( i = 0 ; i < Buffercount ; i++ ) {
3825 if ( BufferList[i].virt_addr ) {
3826 if ( info->bus_type != MGSL_BUS_TYPE_PCI )
3827 dma_free_coherent(NULL, DMABUFFERSIZE, BufferList[i].virt_addr, BufferList[i].dma_addr);
3828 BufferList[i].virt_addr = NULL;
3833 } /* end of mgsl_free_frame_memory() */
3835 /* mgsl_free_dma_buffers()
3839 * Arguments: info pointer to device instance data
3840 * Return Value: None
3842 static void mgsl_free_dma_buffers( struct mgsl_struct *info )
3844 mgsl_free_frame_memory( info, info->rx_buffer_list, info->rx_buffer_count );
3845 mgsl_free_frame_memory( info, info->tx_buffer_list, info->tx_buffer_count );
3846 mgsl_free_buffer_list_memory( info );
3848 } /* end of mgsl_free_dma_buffers() */
3852 * mgsl_alloc_intermediate_rxbuffer_memory()
3854 * Allocate a buffer large enough to hold max_frame_size. This buffer
3855 * is used to pass an assembled frame to the line discipline.
3859 * info pointer to device instance data
3861 * Return Value: 0 if success, otherwise -ENOMEM
3863 static int mgsl_alloc_intermediate_rxbuffer_memory(struct mgsl_struct *info)
3865 info->intermediate_rxbuffer = kmalloc(info->max_frame_size, GFP_KERNEL | GFP_DMA);
3866 if ( info->intermediate_rxbuffer == NULL )
3868 /* unused flag buffer to satisfy receive_buf calling interface */
3869 info->flag_buf = kzalloc(info->max_frame_size, GFP_KERNEL);
3870 if (!info->flag_buf) {
3871 kfree(info->intermediate_rxbuffer);
3872 info->intermediate_rxbuffer = NULL;
3877 } /* end of mgsl_alloc_intermediate_rxbuffer_memory() */
3880 * mgsl_free_intermediate_rxbuffer_memory()
3885 * info pointer to device instance data
3887 * Return Value: None
3889 static void mgsl_free_intermediate_rxbuffer_memory(struct mgsl_struct *info)
3891 kfree(info->intermediate_rxbuffer);
3892 info->intermediate_rxbuffer = NULL;
3893 kfree(info->flag_buf);
3894 info->flag_buf = NULL;
3896 } /* end of mgsl_free_intermediate_rxbuffer_memory() */
3899 * mgsl_alloc_intermediate_txbuffer_memory()
3901 * Allocate intermdiate transmit buffer(s) large enough to hold max_frame_size.
3902 * This buffer is used to load transmit frames into the adapter's dma transfer
3903 * buffers when there is sufficient space.
3907 * info pointer to device instance data
3909 * Return Value: 0 if success, otherwise -ENOMEM
3911 static int mgsl_alloc_intermediate_txbuffer_memory(struct mgsl_struct *info)
3915 if ( debug_level >= DEBUG_LEVEL_INFO )
3916 printk("%s %s(%d) allocating %d tx holding buffers\n",
3917 info->device_name, __FILE__,__LINE__,info->num_tx_holding_buffers);
3919 memset(info->tx_holding_buffers,0,sizeof(info->tx_holding_buffers));
3921 for ( i=0; i<info->num_tx_holding_buffers; ++i) {
3922 info->tx_holding_buffers[i].buffer =
3923 kmalloc(info->max_frame_size, GFP_KERNEL);
3924 if (info->tx_holding_buffers[i].buffer == NULL) {
3925 for (--i; i >= 0; i--) {
3926 kfree(info->tx_holding_buffers[i].buffer);
3927 info->tx_holding_buffers[i].buffer = NULL;
3935 } /* end of mgsl_alloc_intermediate_txbuffer_memory() */
3938 * mgsl_free_intermediate_txbuffer_memory()
3943 * info pointer to device instance data
3945 * Return Value: None
3947 static void mgsl_free_intermediate_txbuffer_memory(struct mgsl_struct *info)
3951 for ( i=0; i<info->num_tx_holding_buffers; ++i ) {
3952 kfree(info->tx_holding_buffers[i].buffer);
3953 info->tx_holding_buffers[i].buffer = NULL;
3956 info->get_tx_holding_index = 0;
3957 info->put_tx_holding_index = 0;
3958 info->tx_holding_count = 0;
3960 } /* end of mgsl_free_intermediate_txbuffer_memory() */
3964 * load_next_tx_holding_buffer()
3966 * attempts to load the next buffered tx request into the
3971 * info pointer to device instance data
3973 * Return Value: true if next buffered tx request loaded
3974 * into adapter's tx dma buffer,
3977 static bool load_next_tx_holding_buffer(struct mgsl_struct *info)
3981 if ( info->tx_holding_count ) {
3982 /* determine if we have enough tx dma buffers
3983 * to accommodate the next tx frame
3985 struct tx_holding_buffer *ptx =
3986 &info->tx_holding_buffers[info->get_tx_holding_index];
3987 int num_free = num_free_tx_dma_buffers(info);
3988 int num_needed = ptx->buffer_size / DMABUFFERSIZE;
3989 if ( ptx->buffer_size % DMABUFFERSIZE )
3992 if (num_needed <= num_free) {
3993 info->xmit_cnt = ptx->buffer_size;
3994 mgsl_load_tx_dma_buffer(info,ptx->buffer,ptx->buffer_size);
3996 --info->tx_holding_count;
3997 if ( ++info->get_tx_holding_index >= info->num_tx_holding_buffers)
3998 info->get_tx_holding_index=0;
4000 /* restart transmit timer */
4001 mod_timer(&info->tx_timer, jiffies + msecs_to_jiffies(5000));
4011 * save_tx_buffer_request()
4013 * attempt to store transmit frame request for later transmission
4017 * info pointer to device instance data
4018 * Buffer pointer to buffer containing frame to load
4019 * BufferSize size in bytes of frame in Buffer
4021 * Return Value: 1 if able to store, 0 otherwise
4023 static int save_tx_buffer_request(struct mgsl_struct *info,const char *Buffer, unsigned int BufferSize)
4025 struct tx_holding_buffer *ptx;
4027 if ( info->tx_holding_count >= info->num_tx_holding_buffers ) {
4028 return 0; /* all buffers in use */
4031 ptx = &info->tx_holding_buffers[info->put_tx_holding_index];
4032 ptx->buffer_size = BufferSize;
4033 memcpy( ptx->buffer, Buffer, BufferSize);
4035 ++info->tx_holding_count;
4036 if ( ++info->put_tx_holding_index >= info->num_tx_holding_buffers)
4037 info->put_tx_holding_index=0;
4042 static int mgsl_claim_resources(struct mgsl_struct *info)
4044 if (request_region(info->io_base,info->io_addr_size,"synclink") == NULL) {
4045 printk( "%s(%d):I/O address conflict on device %s Addr=%08X\n",
4046 __FILE__,__LINE__,info->device_name, info->io_base);
4049 info->io_addr_requested = true;
4051 if ( request_irq(info->irq_level,mgsl_interrupt,info->irq_flags,
4052 info->device_name, info ) < 0 ) {
4053 printk( "%s(%d):Can't request interrupt on device %s IRQ=%d\n",
4054 __FILE__,__LINE__,info->device_name, info->irq_level );
4057 info->irq_requested = true;
4059 if ( info->bus_type == MGSL_BUS_TYPE_PCI ) {
4060 if (request_mem_region(info->phys_memory_base,0x40000,"synclink") == NULL) {
4061 printk( "%s(%d):mem addr conflict device %s Addr=%08X\n",
4062 __FILE__,__LINE__,info->device_name, info->phys_memory_base);
4065 info->shared_mem_requested = true;
4066 if (request_mem_region(info->phys_lcr_base + info->lcr_offset,128,"synclink") == NULL) {
4067 printk( "%s(%d):lcr mem addr conflict device %s Addr=%08X\n",
4068 __FILE__,__LINE__,info->device_name, info->phys_lcr_base + info->lcr_offset);
4071 info->lcr_mem_requested = true;
4073 info->memory_base = ioremap_nocache(info->phys_memory_base,
4075 if (!info->memory_base) {
4076 printk( "%s(%d):Can't map shared memory on device %s MemAddr=%08X\n",
4077 __FILE__,__LINE__,info->device_name, info->phys_memory_base );
4081 if ( !mgsl_memory_test(info) ) {
4082 printk( "%s(%d):Failed shared memory test %s MemAddr=%08X\n",
4083 __FILE__,__LINE__,info->device_name, info->phys_memory_base );
4087 info->lcr_base = ioremap_nocache(info->phys_lcr_base,
4089 if (!info->lcr_base) {
4090 printk( "%s(%d):Can't map LCR memory on device %s MemAddr=%08X\n",
4091 __FILE__,__LINE__,info->device_name, info->phys_lcr_base );
4094 info->lcr_base += info->lcr_offset;
4097 /* claim DMA channel */
4099 if (request_dma(info->dma_level,info->device_name) < 0){
4100 printk( "%s(%d):Can't request DMA channel on device %s DMA=%d\n",
4101 __FILE__,__LINE__,info->device_name, info->dma_level );
4104 info->dma_requested = true;
4106 /* ISA adapter uses bus master DMA */
4107 set_dma_mode(info->dma_level,DMA_MODE_CASCADE);
4108 enable_dma(info->dma_level);
4111 if ( mgsl_allocate_dma_buffers(info) < 0 ) {
4112 printk( "%s(%d):Can't allocate DMA buffers on device %s DMA=%d\n",
4113 __FILE__,__LINE__,info->device_name, info->dma_level );
4119 mgsl_release_resources(info);
4122 } /* end of mgsl_claim_resources() */
4124 static void mgsl_release_resources(struct mgsl_struct *info)
4126 if ( debug_level >= DEBUG_LEVEL_INFO )
4127 printk( "%s(%d):mgsl_release_resources(%s) entry\n",
4128 __FILE__,__LINE__,info->device_name );
4130 if ( info->irq_requested ) {
4131 free_irq(info->irq_level, info);
4132 info->irq_requested = false;
4134 if ( info->dma_requested ) {
4135 disable_dma(info->dma_level);
4136 free_dma(info->dma_level);
4137 info->dma_requested = false;
4139 mgsl_free_dma_buffers(info);
4140 mgsl_free_intermediate_rxbuffer_memory(info);
4141 mgsl_free_intermediate_txbuffer_memory(info);
4143 if ( info->io_addr_requested ) {
4144 release_region(info->io_base,info->io_addr_size);
4145 info->io_addr_requested = false;
4147 if ( info->shared_mem_requested ) {
4148 release_mem_region(info->phys_memory_base,0x40000);
4149 info->shared_mem_requested = false;
4151 if ( info->lcr_mem_requested ) {
4152 release_mem_region(info->phys_lcr_base + info->lcr_offset,128);
4153 info->lcr_mem_requested = false;
4155 if (info->memory_base){
4156 iounmap(info->memory_base);
4157 info->memory_base = NULL;
4159 if (info->lcr_base){
4160 iounmap(info->lcr_base - info->lcr_offset);
4161 info->lcr_base = NULL;
4164 if ( debug_level >= DEBUG_LEVEL_INFO )
4165 printk( "%s(%d):mgsl_release_resources(%s) exit\n",
4166 __FILE__,__LINE__,info->device_name );
4168 } /* end of mgsl_release_resources() */
4170 /* mgsl_add_device()
4172 * Add the specified device instance data structure to the
4173 * global linked list of devices and increment the device count.
4175 * Arguments: info pointer to device instance data
4176 * Return Value: None
4178 static void mgsl_add_device( struct mgsl_struct *info )
4180 info->next_device = NULL;
4181 info->line = mgsl_device_count;
4182 sprintf(info->device_name,"ttySL%d",info->line);
4184 if (info->line < MAX_TOTAL_DEVICES) {
4185 if (maxframe[info->line])
4186 info->max_frame_size = maxframe[info->line];
4188 if (txdmabufs[info->line]) {
4189 info->num_tx_dma_buffers = txdmabufs[info->line];
4190 if (info->num_tx_dma_buffers < 1)
4191 info->num_tx_dma_buffers = 1;
4194 if (txholdbufs[info->line]) {
4195 info->num_tx_holding_buffers = txholdbufs[info->line];
4196 if (info->num_tx_holding_buffers < 1)
4197 info->num_tx_holding_buffers = 1;
4198 else if (info->num_tx_holding_buffers > MAX_TX_HOLDING_BUFFERS)
4199 info->num_tx_holding_buffers = MAX_TX_HOLDING_BUFFERS;
4203 mgsl_device_count++;
4205 if ( !mgsl_device_list )
4206 mgsl_device_list = info;
4208 struct mgsl_struct *current_dev = mgsl_device_list;
4209 while( current_dev->next_device )
4210 current_dev = current_dev->next_device;
4211 current_dev->next_device = info;
4214 if ( info->max_frame_size < 4096 )
4215 info->max_frame_size = 4096;
4216 else if ( info->max_frame_size > 65535 )
4217 info->max_frame_size = 65535;
4219 if ( info->bus_type == MGSL_BUS_TYPE_PCI ) {
4220 printk( "SyncLink PCI v%d %s: IO=%04X IRQ=%d Mem=%08X,%08X MaxFrameSize=%u\n",
4221 info->hw_version + 1, info->device_name, info->io_base, info->irq_level,
4222 info->phys_memory_base, info->phys_lcr_base,
4223 info->max_frame_size );
4225 printk( "SyncLink ISA %s: IO=%04X IRQ=%d DMA=%d MaxFrameSize=%u\n",
4226 info->device_name, info->io_base, info->irq_level, info->dma_level,
4227 info->max_frame_size );
4230 #if SYNCLINK_GENERIC_HDLC
4234 } /* end of mgsl_add_device() */
4236 static const struct tty_port_operations mgsl_port_ops = {
4237 .carrier_raised = carrier_raised,
4242 /* mgsl_allocate_device()
4244 * Allocate and initialize a device instance structure
4247 * Return Value: pointer to mgsl_struct if success, otherwise NULL
4249 static struct mgsl_struct* mgsl_allocate_device(void)
4251 struct mgsl_struct *info;
4253 info = kzalloc(sizeof(struct mgsl_struct),
4257 printk("Error can't allocate device instance data\n");
4259 tty_port_init(&info->port);
4260 info->port.ops = &mgsl_port_ops;
4261 info->magic = MGSL_MAGIC;
4262 INIT_WORK(&info->task, mgsl_bh_handler);
4263 info->max_frame_size = 4096;
4264 info->port.close_delay = 5*HZ/10;
4265 info->port.closing_wait = 30*HZ;
4266 init_waitqueue_head(&info->status_event_wait_q);
4267 init_waitqueue_head(&info->event_wait_q);
4268 spin_lock_init(&info->irq_spinlock);
4269 spin_lock_init(&info->netlock);
4270 memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS));
4271 info->idle_mode = HDLC_TXIDLE_FLAGS;
4272 info->num_tx_dma_buffers = 1;
4273 info->num_tx_holding_buffers = 0;
4278 } /* end of mgsl_allocate_device()*/
4280 static const struct tty_operations mgsl_ops = {
4281 .install = mgsl_install,
4283 .close = mgsl_close,
4284 .write = mgsl_write,
4285 .put_char = mgsl_put_char,
4286 .flush_chars = mgsl_flush_chars,
4287 .write_room = mgsl_write_room,
4288 .chars_in_buffer = mgsl_chars_in_buffer,
4289 .flush_buffer = mgsl_flush_buffer,
4290 .ioctl = mgsl_ioctl,
4291 .throttle = mgsl_throttle,
4292 .unthrottle = mgsl_unthrottle,
4293 .send_xchar = mgsl_send_xchar,
4294 .break_ctl = mgsl_break,
4295 .wait_until_sent = mgsl_wait_until_sent,
4296 .set_termios = mgsl_set_termios,
4298 .start = mgsl_start,
4299 .hangup = mgsl_hangup,
4300 .tiocmget = tiocmget,
4301 .tiocmset = tiocmset,
4302 .get_icount = msgl_get_icount,
4303 .proc_fops = &mgsl_proc_fops,
4307 * perform tty device initialization
4309 static int mgsl_init_tty(void)
4313 serial_driver = alloc_tty_driver(128);
4317 serial_driver->driver_name = "synclink";
4318 serial_driver->name = "ttySL";
4319 serial_driver->major = ttymajor;
4320 serial_driver->minor_start = 64;
4321 serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
4322 serial_driver->subtype = SERIAL_TYPE_NORMAL;
4323 serial_driver->init_termios = tty_std_termios;
4324 serial_driver->init_termios.c_cflag =
4325 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
4326 serial_driver->init_termios.c_ispeed = 9600;
4327 serial_driver->init_termios.c_ospeed = 9600;
4328 serial_driver->flags = TTY_DRIVER_REAL_RAW;
4329 tty_set_operations(serial_driver, &mgsl_ops);
4330 if ((rc = tty_register_driver(serial_driver)) < 0) {
4331 printk("%s(%d):Couldn't register serial driver\n",
4333 put_tty_driver(serial_driver);
4334 serial_driver = NULL;
4338 printk("%s %s, tty major#%d\n",
4339 driver_name, driver_version,
4340 serial_driver->major);
4344 /* enumerate user specified ISA adapters
4346 static void mgsl_enum_isa_devices(void)
4348 struct mgsl_struct *info;
4351 /* Check for user specified ISA devices */
4353 for (i=0 ;(i < MAX_ISA_DEVICES) && io[i] && irq[i]; i++){
4354 if ( debug_level >= DEBUG_LEVEL_INFO )
4355 printk("ISA device specified io=%04X,irq=%d,dma=%d\n",
4356 io[i], irq[i], dma[i] );
4358 info = mgsl_allocate_device();
4360 /* error allocating device instance data */
4361 if ( debug_level >= DEBUG_LEVEL_ERROR )
4362 printk( "can't allocate device instance data.\n");
4366 /* Copy user configuration info to device instance data */
4367 info->io_base = (unsigned int)io[i];
4368 info->irq_level = (unsigned int)irq[i];
4369 info->irq_level = irq_canonicalize(info->irq_level);
4370 info->dma_level = (unsigned int)dma[i];
4371 info->bus_type = MGSL_BUS_TYPE_ISA;
4372 info->io_addr_size = 16;
4373 info->irq_flags = 0;
4375 mgsl_add_device( info );
4379 static void synclink_cleanup(void)
4382 struct mgsl_struct *info;
4383 struct mgsl_struct *tmp;
4385 printk("Unloading %s: %s\n", driver_name, driver_version);
4387 if (serial_driver) {
4388 rc = tty_unregister_driver(serial_driver);
4390 printk("%s(%d) failed to unregister tty driver err=%d\n",
4391 __FILE__,__LINE__,rc);
4392 put_tty_driver(serial_driver);
4395 info = mgsl_device_list;
4397 #if SYNCLINK_GENERIC_HDLC
4400 mgsl_release_resources(info);
4402 info = info->next_device;
4403 tty_port_destroy(&tmp->port);
4408 pci_unregister_driver(&synclink_pci_driver);
4411 static int __init synclink_init(void)
4415 if (break_on_load) {
4416 mgsl_get_text_ptr();
4420 printk("%s %s\n", driver_name, driver_version);
4422 mgsl_enum_isa_devices();
4423 if ((rc = pci_register_driver(&synclink_pci_driver)) < 0)
4424 printk("%s:failed to register PCI driver, error=%d\n",__FILE__,rc);
4426 pci_registered = true;
4428 if ((rc = mgsl_init_tty()) < 0)
4438 static void __exit synclink_exit(void)
4443 module_init(synclink_init);
4444 module_exit(synclink_exit);
4449 * Issue a USC Receive/Transmit command to the
4450 * Channel Command/Address Register (CCAR).
4454 * The command is encoded in the most significant 5 bits <15..11>
4455 * of the CCAR value. Bits <10..7> of the CCAR must be preserved
4456 * and Bits <6..0> must be written as zeros.
4460 * info pointer to device information structure
4461 * Cmd command mask (use symbolic macros)
4467 static void usc_RTCmd( struct mgsl_struct *info, u16 Cmd )
4469 /* output command to CCAR in bits <15..11> */
4470 /* preserve bits <10..7>, bits <6..0> must be zero */
4472 outw( Cmd + info->loopback_bits, info->io_base + CCAR );
4474 /* Read to flush write to CCAR */
4475 if ( info->bus_type == MGSL_BUS_TYPE_PCI )
4476 inw( info->io_base + CCAR );
4478 } /* end of usc_RTCmd() */
4483 * Issue a DMA command to the DMA Command/Address Register (DCAR).
4487 * info pointer to device information structure
4488 * Cmd DMA command mask (usc_DmaCmd_XX Macros)
4494 static void usc_DmaCmd( struct mgsl_struct *info, u16 Cmd )
4496 /* write command mask to DCAR */
4497 outw( Cmd + info->mbre_bit, info->io_base );
4499 /* Read to flush write to DCAR */
4500 if ( info->bus_type == MGSL_BUS_TYPE_PCI )
4501 inw( info->io_base );
4503 } /* end of usc_DmaCmd() */
4508 * Write a 16-bit value to a USC DMA register
4512 * info pointer to device info structure
4513 * RegAddr register address (number) for write
4514 * RegValue 16-bit value to write to register
4521 static void usc_OutDmaReg( struct mgsl_struct *info, u16 RegAddr, u16 RegValue )
4523 /* Note: The DCAR is located at the adapter base address */
4524 /* Note: must preserve state of BIT8 in DCAR */
4526 outw( RegAddr + info->mbre_bit, info->io_base );
4527 outw( RegValue, info->io_base );
4529 /* Read to flush write to DCAR */
4530 if ( info->bus_type == MGSL_BUS_TYPE_PCI )
4531 inw( info->io_base );
4533 } /* end of usc_OutDmaReg() */
4538 * Read a 16-bit value from a DMA register
4542 * info pointer to device info structure
4543 * RegAddr register address (number) to read from
4547 * The 16-bit value read from register
4550 static u16 usc_InDmaReg( struct mgsl_struct *info, u16 RegAddr )
4552 /* Note: The DCAR is located at the adapter base address */
4553 /* Note: must preserve state of BIT8 in DCAR */
4555 outw( RegAddr + info->mbre_bit, info->io_base );
4556 return inw( info->io_base );
4558 } /* end of usc_InDmaReg() */
4564 * Write a 16-bit value to a USC serial channel register
4568 * info pointer to device info structure
4569 * RegAddr register address (number) to write to
4570 * RegValue 16-bit value to write to register
4577 static void usc_OutReg( struct mgsl_struct *info, u16 RegAddr, u16 RegValue )
4579 outw( RegAddr + info->loopback_bits, info->io_base + CCAR );
4580 outw( RegValue, info->io_base + CCAR );
4582 /* Read to flush write to CCAR */
4583 if ( info->bus_type == MGSL_BUS_TYPE_PCI )
4584 inw( info->io_base + CCAR );
4586 } /* end of usc_OutReg() */
4591 * Reads a 16-bit value from a USC serial channel register
4595 * info pointer to device extension
4596 * RegAddr register address (number) to read from
4600 * 16-bit value read from register
4602 static u16 usc_InReg( struct mgsl_struct *info, u16 RegAddr )
4604 outw( RegAddr + info->loopback_bits, info->io_base + CCAR );
4605 return inw( info->io_base + CCAR );
4607 } /* end of usc_InReg() */
4609 /* usc_set_sdlc_mode()
4611 * Set up the adapter for SDLC DMA communications.
4613 * Arguments: info pointer to device instance data
4614 * Return Value: NONE
4616 static void usc_set_sdlc_mode( struct mgsl_struct *info )
4622 * determine if the IUSC on the adapter is pre-SL1660. If
4623 * not, take advantage of the UnderWait feature of more
4624 * modern chips. If an underrun occurs and this bit is set,
4625 * the transmitter will idle the programmed idle pattern
4626 * until the driver has time to service the underrun. Otherwise,
4627 * the dma controller may get the cycles previously requested
4628 * and begin transmitting queued tx data.
4630 usc_OutReg(info,TMCR,0x1f);
4631 RegValue=usc_InReg(info,TMDR);
4632 PreSL1660 = (RegValue == IUSC_PRE_SL1660);
4634 if ( info->params.flags & HDLC_FLAG_HDLC_LOOPMODE )
4637 ** Channel Mode Register (CMR)
4639 ** <15..14> 10 Tx Sub Modes, Send Flag on Underrun
4640 ** <13> 0 0 = Transmit Disabled (initially)
4641 ** <12> 0 1 = Consecutive Idles share common 0
4642 ** <11..8> 1110 Transmitter Mode = HDLC/SDLC Loop
4643 ** <7..4> 0000 Rx Sub Modes, addr/ctrl field handling
4644 ** <3..0> 0110 Receiver Mode = HDLC/SDLC
4646 ** 1000 1110 0000 0110 = 0x8e06
4650 /*--------------------------------------------------
4651 * ignore user options for UnderRun Actions and
4653 *--------------------------------------------------*/
4657 /* Channel mode Register (CMR)
4659 * <15..14> 00 Tx Sub modes, Underrun Action
4660 * <13> 0 1 = Send Preamble before opening flag
4661 * <12> 0 1 = Consecutive Idles share common 0
4662 * <11..8> 0110 Transmitter mode = HDLC/SDLC
4663 * <7..4> 0000 Rx Sub modes, addr/ctrl field handling
4664 * <3..0> 0110 Receiver mode = HDLC/SDLC
4666 * 0000 0110 0000 0110 = 0x0606
4668 if (info->params.mode == MGSL_MODE_RAW) {
4669 RegValue = 0x0001; /* Set Receive mode = external sync */
4671 usc_OutReg( info, IOCR, /* Set IOCR DCD is RxSync Detect Input */
4672 (unsigned short)((usc_InReg(info, IOCR) & ~(BIT13|BIT12)) | BIT12));
4676 * CMR <15> 0 Don't send CRC on Tx Underrun
4677 * CMR <14> x undefined
4678 * CMR <13> 0 Send preamble before openning sync
4679 * CMR <12> 0 Send 8-bit syncs, 1=send Syncs per TxLength
4682 * CMR <11-8) 0100 MonoSync
4684 * 0x00 0100 xxxx xxxx 04xx
4692 if ( info->params.flags & HDLC_FLAG_UNDERRUN_ABORT15 )
4694 else if ( info->params.flags & HDLC_FLAG_UNDERRUN_FLAG )
4696 else if ( info->params.flags & HDLC_FLAG_UNDERRUN_CRC )
4697 RegValue |= BIT15 | BIT14;
4700 if ( info->params.preamble != HDLC_PREAMBLE_PATTERN_NONE )
4704 if ( info->params.mode == MGSL_MODE_HDLC &&
4705 (info->params.flags & HDLC_FLAG_SHARE_ZERO) )
4708 if ( info->params.addr_filter != 0xff )
4710 /* set up receive address filtering */
4711 usc_OutReg( info, RSR, info->params.addr_filter );
4715 usc_OutReg( info, CMR, RegValue );
4716 info->cmr_value = RegValue;
4718 /* Receiver mode Register (RMR)
4720 * <15..13> 000 encoding
4721 * <12..11> 00 FCS = 16bit CRC CCITT (x15 + x12 + x5 + 1)
4722 * <10> 1 1 = Set CRC to all 1s (use for SDLC/HDLC)
4723 * <9> 0 1 = Include Receive chars in CRC
4724 * <8> 1 1 = Use Abort/PE bit as abort indicator
4725 * <7..6> 00 Even parity
4726 * <5> 0 parity disabled
4727 * <4..2> 000 Receive Char Length = 8 bits
4728 * <1..0> 00 Disable Receiver
4730 * 0000 0101 0000 0000 = 0x0500
4735 switch ( info->params.encoding ) {
4736 case HDLC_ENCODING_NRZB: RegValue |= BIT13; break;
4737 case HDLC_ENCODING_NRZI_MARK: RegValue |= BIT14; break;
4738 case HDLC_ENCODING_NRZI_SPACE: RegValue |= BIT14 | BIT13; break;
4739 case HDLC_ENCODING_BIPHASE_MARK: RegValue |= BIT15; break;
4740 case HDLC_ENCODING_BIPHASE_SPACE: RegValue |= BIT15 | BIT13; break;
4741 case HDLC_ENCODING_BIPHASE_LEVEL: RegValue |= BIT15 | BIT14; break;
4742 case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: RegValue |= BIT15 | BIT14 | BIT13; break;
4745 if ( (info->params.crc_type & HDLC_CRC_MASK) == HDLC_CRC_16_CCITT )
4747 else if ( (info->params.crc_type & HDLC_CRC_MASK) == HDLC_CRC_32_CCITT )
4748 RegValue |= ( BIT12 | BIT10 | BIT9 );
4750 usc_OutReg( info, RMR, RegValue );
4752 /* Set the Receive count Limit Register (RCLR) to 0xffff. */
4753 /* When an opening flag of an SDLC frame is recognized the */
4754 /* Receive Character count (RCC) is loaded with the value in */
4755 /* RCLR. The RCC is decremented for each received byte. The */
4756 /* value of RCC is stored after the closing flag of the frame */
4757 /* allowing the frame size to be computed. */
4759 usc_OutReg( info, RCLR, RCLRVALUE );
4761 usc_RCmd( info, RCmd_SelectRicrdma_level );
4763 /* Receive Interrupt Control Register (RICR)
4765 * <15..8> ? RxFIFO DMA Request Level
4766 * <7> 0 Exited Hunt IA (Interrupt Arm)
4767 * <6> 0 Idle Received IA
4768 * <5> 0 Break/Abort IA
4770 * <3> 1 Queued status reflects oldest 2 bytes in FIFO
4772 * <1> 1 Rx Overrun IA
4773 * <0> 0 Select TC0 value for readback
4775 * 0000 0000 0000 1000 = 0x000a
4778 /* Carry over the Exit Hunt and Idle Received bits */
4779 /* in case they have been armed by usc_ArmEvents. */
4781 RegValue = usc_InReg( info, RICR ) & 0xc0;
4783 if ( info->bus_type == MGSL_BUS_TYPE_PCI )
4784 usc_OutReg( info, RICR, (u16)(0x030a | RegValue) );
4786 usc_OutReg( info, RICR, (u16)(0x140a | RegValue) );
4788 /* Unlatch all Rx status bits and clear Rx status IRQ Pending */
4790 usc_UnlatchRxstatusBits( info, RXSTATUS_ALL );
4791 usc_ClearIrqPendingBits( info, RECEIVE_STATUS );
4793 /* Transmit mode Register (TMR)
4795 * <15..13> 000 encoding
4796 * <12..11> 00 FCS = 16bit CRC CCITT (x15 + x12 + x5 + 1)
4797 * <10> 1 1 = Start CRC as all 1s (use for SDLC/HDLC)
4798 * <9> 0 1 = Tx CRC Enabled
4799 * <8> 0 1 = Append CRC to end of transmit frame
4800 * <7..6> 00 Transmit parity Even
4801 * <5> 0 Transmit parity Disabled
4802 * <4..2> 000 Tx Char Length = 8 bits
4803 * <1..0> 00 Disable Transmitter
4805 * 0000 0100 0000 0000 = 0x0400
4810 switch ( info->params.encoding ) {
4811 case HDLC_ENCODING_NRZB: RegValue |= BIT13; break;
4812 case HDLC_ENCODING_NRZI_MARK: RegValue |= BIT14; break;
4813 case HDLC_ENCODING_NRZI_SPACE: RegValue |= BIT14 | BIT13; break;
4814 case HDLC_ENCODING_BIPHASE_MARK: RegValue |= BIT15; break;
4815 case HDLC_ENCODING_BIPHASE_SPACE: RegValue |= BIT15 | BIT13; break;
4816 case HDLC_ENCODING_BIPHASE_LEVEL: RegValue |= BIT15 | BIT14; break;
4817 case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: RegValue |= BIT15 | BIT14 | BIT13; break;
4820 if ( (info->params.crc_type & HDLC_CRC_MASK) == HDLC_CRC_16_CCITT )
4821 RegValue |= BIT9 | BIT8;
4822 else if ( (info->params.crc_type & HDLC_CRC_MASK) == HDLC_CRC_32_CCITT )
4823 RegValue |= ( BIT12 | BIT10 | BIT9 | BIT8);
4825 usc_OutReg( info, TMR, RegValue );
4827 usc_set_txidle( info );
4830 usc_TCmd( info, TCmd_SelectTicrdma_level );
4832 /* Transmit Interrupt Control Register (TICR)
4834 * <15..8> ? Transmit FIFO DMA Level
4835 * <7> 0 Present IA (Interrupt Arm)
4836 * <6> 0 Idle Sent IA
4837 * <5> 1 Abort Sent IA
4838 * <4> 1 EOF/EOM Sent IA
4840 * <2> 1 1 = Wait for SW Trigger to Start Frame
4841 * <1> 1 Tx Underrun IA
4842 * <0> 0 TC0 constant on read back
4844 * 0000 0000 0011 0110 = 0x0036
4847 if ( info->bus_type == MGSL_BUS_TYPE_PCI )
4848 usc_OutReg( info, TICR, 0x0736 );
4850 usc_OutReg( info, TICR, 0x1436 );
4852 usc_UnlatchTxstatusBits( info, TXSTATUS_ALL );
4853 usc_ClearIrqPendingBits( info, TRANSMIT_STATUS );
4856 ** Transmit Command/Status Register (TCSR)
4858 ** <15..12> 0000 TCmd
4859 ** <11> 0/1 UnderWait
4860 ** <10..08> 000 TxIdle
4864 ** <4> x EOF/EOM Sent
4870 ** 0000 0000 0000 0000 = 0x0000
4872 info->tcsr_value = 0;
4875 info->tcsr_value |= TCSR_UNDERWAIT;
4877 usc_OutReg( info, TCSR, info->tcsr_value );
4879 /* Clock mode Control Register (CMCR)
4881 * <15..14> 00 counter 1 Source = Disabled
4882 * <13..12> 00 counter 0 Source = Disabled
4883 * <11..10> 11 BRG1 Input is TxC Pin
4884 * <9..8> 11 BRG0 Input is TxC Pin
4885 * <7..6> 01 DPLL Input is BRG1 Output
4886 * <5..3> XXX TxCLK comes from Port 0
4887 * <2..0> XXX RxCLK comes from Port 1
4889 * 0000 1111 0111 0111 = 0x0f77
4894 if ( info->params.flags & HDLC_FLAG_RXC_DPLL )
4895 RegValue |= 0x0003; /* RxCLK from DPLL */
4896 else if ( info->params.flags & HDLC_FLAG_RXC_BRG )
4897 RegValue |= 0x0004; /* RxCLK from BRG0 */
4898 else if ( info->params.flags & HDLC_FLAG_RXC_TXCPIN)
4899 RegValue |= 0x0006; /* RxCLK from TXC Input */
4901 RegValue |= 0x0007; /* RxCLK from Port1 */
4903 if ( info->params.flags & HDLC_FLAG_TXC_DPLL )
4904 RegValue |= 0x0018; /* TxCLK from DPLL */
4905 else if ( info->params.flags & HDLC_FLAG_TXC_BRG )
4906 RegValue |= 0x0020; /* TxCLK from BRG0 */
4907 else if ( info->params.flags & HDLC_FLAG_TXC_RXCPIN)
4908 RegValue |= 0x0038; /* RxCLK from TXC Input */
4910 RegValue |= 0x0030; /* TxCLK from Port0 */
4912 usc_OutReg( info, CMCR, RegValue );
4915 /* Hardware Configuration Register (HCR)
4917 * <15..14> 00 CTR0 Divisor:00=32,01=16,10=8,11=4
4918 * <13> 0 CTR1DSel:0=CTR0Div determines CTR0Div
4919 * <12> 0 CVOK:0=report code violation in biphase
4920 * <11..10> 00 DPLL Divisor:00=32,01=16,10=8,11=4
4921 * <9..8> XX DPLL mode:00=disable,01=NRZ,10=Biphase,11=Biphase Level
4922 * <7..6> 00 reserved
4923 * <5> 0 BRG1 mode:0=continuous,1=single cycle
4925 * <3..2> 00 reserved
4926 * <1> 0 BRG0 mode:0=continuous,1=single cycle
4932 if ( info->params.flags & (HDLC_FLAG_RXC_DPLL | HDLC_FLAG_TXC_DPLL) ) {
4937 /* DPLL is enabled. Use BRG1 to provide continuous reference clock */
4938 /* for DPLL. DPLL mode in HCR is dependent on the encoding used. */
4940 if ( info->bus_type == MGSL_BUS_TYPE_PCI )
4941 XtalSpeed = 11059200;
4943 XtalSpeed = 14745600;
4945 if ( info->params.flags & HDLC_FLAG_DPLL_DIV16 ) {
4949 else if ( info->params.flags & HDLC_FLAG_DPLL_DIV8 ) {
4956 /* Tc = (Xtal/Speed) - 1 */
4957 /* If twice the remainder of (Xtal/Speed) is greater than Speed */
4958 /* then rounding up gives a more precise time constant. Instead */
4959 /* of rounding up and then subtracting 1 we just don't subtract */
4960 /* the one in this case. */
4962 /*--------------------------------------------------
4963 * ejz: for DPLL mode, application should use the
4964 * same clock speed as the partner system, even
4965 * though clocking is derived from the input RxData.
4966 * In case the user uses a 0 for the clock speed,
4967 * default to 0xffffffff and don't try to divide by
4969 *--------------------------------------------------*/
4970 if ( info->params.clock_speed )
4972 Tc = (u16)((XtalSpeed/DpllDivisor)/info->params.clock_speed);
4973 if ( !((((XtalSpeed/DpllDivisor) % info->params.clock_speed) * 2)
4974 / info->params.clock_speed) )
4981 /* Write 16-bit Time Constant for BRG1 */
4982 usc_OutReg( info, TC1R, Tc );
4984 RegValue |= BIT4; /* enable BRG1 */
4986 switch ( info->params.encoding ) {
4987 case HDLC_ENCODING_NRZ:
4988 case HDLC_ENCODING_NRZB:
4989 case HDLC_ENCODING_NRZI_MARK:
4990 case HDLC_ENCODING_NRZI_SPACE: RegValue |= BIT8; break;
4991 case HDLC_ENCODING_BIPHASE_MARK:
4992 case HDLC_ENCODING_BIPHASE_SPACE: RegValue |= BIT9; break;
4993 case HDLC_ENCODING_BIPHASE_LEVEL:
4994 case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: RegValue |= BIT9 | BIT8; break;
4998 usc_OutReg( info, HCR, RegValue );
5001 /* Channel Control/status Register (CCSR)
5003 * <15> X RCC FIFO Overflow status (RO)
5004 * <14> X RCC FIFO Not Empty status (RO)
5005 * <13> 0 1 = Clear RCC FIFO (WO)
5006 * <12> X DPLL Sync (RW)
5007 * <11> X DPLL 2 Missed Clocks status (RO)
5008 * <10> X DPLL 1 Missed Clock status (RO)
5009 * <9..8> 00 DPLL Resync on rising and falling edges (RW)
5010 * <7> X SDLC Loop On status (RO)
5011 * <6> X SDLC Loop Send status (RO)
5012 * <5> 1 Bypass counters for TxClk and RxClk (RW)
5013 * <4..2> 000 Last Char of SDLC frame has 8 bits (RW)
5014 * <1..0> 00 reserved
5016 * 0000 0000 0010 0000 = 0x0020
5019 usc_OutReg( info, CCSR, 0x1020 );
5022 if ( info->params.flags & HDLC_FLAG_AUTO_CTS ) {
5023 usc_OutReg( info, SICR,
5024 (u16)(usc_InReg(info,SICR) | SICR_CTS_INACTIVE) );
5028 /* enable Master Interrupt Enable bit (MIE) */
5029 usc_EnableMasterIrqBit( info );
5031 usc_ClearIrqPendingBits( info, RECEIVE_STATUS | RECEIVE_DATA |
5032 TRANSMIT_STATUS | TRANSMIT_DATA | MISC);
5034 /* arm RCC underflow interrupt */
5035 usc_OutReg(info, SICR, (u16)(usc_InReg(info,SICR) | BIT3));
5036 usc_EnableInterrupts(info, MISC);
5039 outw( 0, info->io_base ); /* clear Master Bus Enable (DCAR) */
5040 usc_DmaCmd( info, DmaCmd_ResetAllChannels ); /* disable both DMA channels */
5041 info->mbre_bit = BIT8;
5042 outw( BIT8, info->io_base ); /* set Master Bus Enable (DCAR) */
5044 if (info->bus_type == MGSL_BUS_TYPE_ISA) {
5045 /* Enable DMAEN (Port 7, Bit 14) */
5046 /* This connects the DMA request signal to the ISA bus */
5047 usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT15) & ~BIT14));
5050 /* DMA Control Register (DCR)
5052 * <15..14> 10 Priority mode = Alternating Tx/Rx
5053 * 01 Rx has priority
5054 * 00 Tx has priority
5056 * <13> 1 Enable Priority Preempt per DCR<15..14>
5057 * (WARNING DCR<11..10> must be 00 when this is 1)
5058 * 0 Choose activate channel per DCR<11..10>
5060 * <12> 0 Little Endian for Array/List
5061 * <11..10> 00 Both Channels can use each bus grant
5062 * <9..6> 0000 reserved
5063 * <5> 0 7 CLK - Minimum Bus Re-request Interval
5064 * <4> 0 1 = drive D/C and S/D pins
5065 * <3> 1 1 = Add one wait state to all DMA cycles.
5066 * <2> 0 1 = Strobe /UAS on every transfer.
5067 * <1..0> 11 Addr incrementing only affects LS24 bits
5069 * 0110 0000 0000 1011 = 0x600b
5072 if ( info->bus_type == MGSL_BUS_TYPE_PCI ) {
5073 /* PCI adapter does not need DMA wait state */
5074 usc_OutDmaReg( info, DCR, 0xa00b );
5077 usc_OutDmaReg( info, DCR, 0x800b );
5080 /* Receive DMA mode Register (RDMR)
5082 * <15..14> 11 DMA mode = Linked List Buffer mode
5083 * <13> 1 RSBinA/L = store Rx status Block in Arrary/List entry
5084 * <12> 1 Clear count of List Entry after fetching
5085 * <11..10> 00 Address mode = Increment
5086 * <9> 1 Terminate Buffer on RxBound
5087 * <8> 0 Bus Width = 16bits
5088 * <7..0> ? status Bits (write as 0s)
5090 * 1111 0010 0000 0000 = 0xf200
5093 usc_OutDmaReg( info, RDMR, 0xf200 );
5096 /* Transmit DMA mode Register (TDMR)
5098 * <15..14> 11 DMA mode = Linked List Buffer mode
5099 * <13> 1 TCBinA/L = fetch Tx Control Block from List entry
5100 * <12> 1 Clear count of List Entry after fetching
5101 * <11..10> 00 Address mode = Increment
5102 * <9> 1 Terminate Buffer on end of frame
5103 * <8> 0 Bus Width = 16bits
5104 * <7..0> ? status Bits (Read Only so write as 0)
5106 * 1111 0010 0000 0000 = 0xf200
5109 usc_OutDmaReg( info, TDMR, 0xf200 );
5112 /* DMA Interrupt Control Register (DICR)
5114 * <15> 1 DMA Interrupt Enable
5115 * <14> 0 1 = Disable IEO from USC
5116 * <13> 0 1 = Don't provide vector during IntAck
5117 * <12> 1 1 = Include status in Vector
5118 * <10..2> 0 reserved, Must be 0s
5119 * <1> 0 1 = Rx DMA Interrupt Enabled
5120 * <0> 0 1 = Tx DMA Interrupt Enabled
5122 * 1001 0000 0000 0000 = 0x9000
5125 usc_OutDmaReg( info, DICR, 0x9000 );
5127 usc_InDmaReg( info, RDMR ); /* clear pending receive DMA IRQ bits */
5128 usc_InDmaReg( info, TDMR ); /* clear pending transmit DMA IRQ bits */
5129 usc_OutDmaReg( info, CDIR, 0x0303 ); /* clear IUS and Pending for Tx and Rx */
5131 /* Channel Control Register (CCR)
5133 * <15..14> 10 Use 32-bit Tx Control Blocks (TCBs)
5134 * <13> 0 Trigger Tx on SW Command Disabled
5135 * <12> 0 Flag Preamble Disabled
5136 * <11..10> 00 Preamble Length
5137 * <9..8> 00 Preamble Pattern
5138 * <7..6> 10 Use 32-bit Rx status Blocks (RSBs)
5139 * <5> 0 Trigger Rx on SW Command Disabled
5142 * 1000 0000 1000 0000 = 0x8080
5147 switch ( info->params.preamble_length ) {
5148 case HDLC_PREAMBLE_LENGTH_16BITS: RegValue |= BIT10; break;
5149 case HDLC_PREAMBLE_LENGTH_32BITS: RegValue |= BIT11; break;
5150 case HDLC_PREAMBLE_LENGTH_64BITS: RegValue |= BIT11 | BIT10; break;
5153 switch ( info->params.preamble ) {
5154 case HDLC_PREAMBLE_PATTERN_FLAGS: RegValue |= BIT8 | BIT12; break;
5155 case HDLC_PREAMBLE_PATTERN_ONES: RegValue |= BIT8; break;
5156 case HDLC_PREAMBLE_PATTERN_10: RegValue |= BIT9; break;
5157 case HDLC_PREAMBLE_PATTERN_01: RegValue |= BIT9 | BIT8; break;
5160 usc_OutReg( info, CCR, RegValue );
5164 * Burst/Dwell Control Register
5166 * <15..8> 0x20 Maximum number of transfers per bus grant
5167 * <7..0> 0x00 Maximum number of clock cycles per bus grant
5170 if ( info->bus_type == MGSL_BUS_TYPE_PCI ) {
5171 /* don't limit bus occupancy on PCI adapter */
5172 usc_OutDmaReg( info, BDCR, 0x0000 );
5175 usc_OutDmaReg( info, BDCR, 0x2000 );
5177 usc_stop_transmitter(info);
5178 usc_stop_receiver(info);
5180 } /* end of usc_set_sdlc_mode() */
5182 /* usc_enable_loopback()
5184 * Set the 16C32 for internal loopback mode.
5185 * The TxCLK and RxCLK signals are generated from the BRG0 and
5186 * the TxD is looped back to the RxD internally.
5188 * Arguments: info pointer to device instance data
5189 * enable 1 = enable loopback, 0 = disable
5190 * Return Value: None
5192 static void usc_enable_loopback(struct mgsl_struct *info, int enable)
5195 /* blank external TXD output */
5196 usc_OutReg(info,IOCR,usc_InReg(info,IOCR) | (BIT7 | BIT6));
5198 /* Clock mode Control Register (CMCR)
5200 * <15..14> 00 counter 1 Disabled
5201 * <13..12> 00 counter 0 Disabled
5202 * <11..10> 11 BRG1 Input is TxC Pin
5203 * <9..8> 11 BRG0 Input is TxC Pin
5204 * <7..6> 01 DPLL Input is BRG1 Output
5205 * <5..3> 100 TxCLK comes from BRG0
5206 * <2..0> 100 RxCLK comes from BRG0
5208 * 0000 1111 0110 0100 = 0x0f64
5211 usc_OutReg( info, CMCR, 0x0f64 );
5213 /* Write 16-bit Time Constant for BRG0 */
5214 /* use clock speed if available, otherwise use 8 for diagnostics */
5215 if (info->params.clock_speed) {
5216 if (info->bus_type == MGSL_BUS_TYPE_PCI)
5217 usc_OutReg(info, TC0R, (u16)((11059200/info->params.clock_speed)-1));
5219 usc_OutReg(info, TC0R, (u16)((14745600/info->params.clock_speed)-1));
5221 usc_OutReg(info, TC0R, (u16)8);
5223 /* Hardware Configuration Register (HCR) Clear Bit 1, BRG0
5224 mode = Continuous Set Bit 0 to enable BRG0. */
5225 usc_OutReg( info, HCR, (u16)((usc_InReg( info, HCR ) & ~BIT1) | BIT0) );
5227 /* Input/Output Control Reg, <2..0> = 100, Drive RxC pin with BRG0 */
5228 usc_OutReg(info, IOCR, (u16)((usc_InReg(info, IOCR) & 0xfff8) | 0x0004));
5230 /* set Internal Data loopback mode */
5231 info->loopback_bits = 0x300;
5232 outw( 0x0300, info->io_base + CCAR );
5234 /* enable external TXD output */
5235 usc_OutReg(info,IOCR,usc_InReg(info,IOCR) & ~(BIT7 | BIT6));
5237 /* clear Internal Data loopback mode */
5238 info->loopback_bits = 0;
5239 outw( 0,info->io_base + CCAR );
5242 } /* end of usc_enable_loopback() */
5244 /* usc_enable_aux_clock()
5246 * Enabled the AUX clock output at the specified frequency.
5250 * info pointer to device extension
5251 * data_rate data rate of clock in bits per second
5252 * A data rate of 0 disables the AUX clock.
5254 * Return Value: None
5256 static void usc_enable_aux_clock( struct mgsl_struct *info, u32 data_rate )
5262 if ( info->bus_type == MGSL_BUS_TYPE_PCI )
5263 XtalSpeed = 11059200;
5265 XtalSpeed = 14745600;
5268 /* Tc = (Xtal/Speed) - 1 */
5269 /* If twice the remainder of (Xtal/Speed) is greater than Speed */
5270 /* then rounding up gives a more precise time constant. Instead */
5271 /* of rounding up and then subtracting 1 we just don't subtract */
5272 /* the one in this case. */
5275 Tc = (u16)(XtalSpeed/data_rate);
5276 if ( !(((XtalSpeed % data_rate) * 2) / data_rate) )
5279 /* Write 16-bit Time Constant for BRG0 */
5280 usc_OutReg( info, TC0R, Tc );
5283 * Hardware Configuration Register (HCR)
5284 * Clear Bit 1, BRG0 mode = Continuous
5285 * Set Bit 0 to enable BRG0.
5288 usc_OutReg( info, HCR, (u16)((usc_InReg( info, HCR ) & ~BIT1) | BIT0) );
5290 /* Input/Output Control Reg, <2..0> = 100, Drive RxC pin with BRG0 */
5291 usc_OutReg( info, IOCR, (u16)((usc_InReg(info, IOCR) & 0xfff8) | 0x0004) );
5293 /* data rate == 0 so turn off BRG0 */
5294 usc_OutReg( info, HCR, (u16)(usc_InReg( info, HCR ) & ~BIT0) );
5297 } /* end of usc_enable_aux_clock() */
5301 * usc_process_rxoverrun_sync()
5303 * This function processes a receive overrun by resetting the
5304 * receive DMA buffers and issuing a Purge Rx FIFO command
5305 * to allow the receiver to continue receiving.
5309 * info pointer to device extension
5311 * Return Value: None
5313 static void usc_process_rxoverrun_sync( struct mgsl_struct *info )
5317 int frame_start_index;
5318 bool start_of_frame_found = false;
5319 bool end_of_frame_found = false;
5320 bool reprogram_dma = false;
5322 DMABUFFERENTRY *buffer_list = info->rx_buffer_list;
5325 usc_DmaCmd( info, DmaCmd_PauseRxChannel );
5326 usc_RCmd( info, RCmd_EnterHuntmode );
5327 usc_RTCmd( info, RTCmd_PurgeRxFifo );
5329 /* CurrentRxBuffer points to the 1st buffer of the next */
5330 /* possibly available receive frame. */
5332 frame_start_index = start_index = end_index = info->current_rx_buffer;
5334 /* Search for an unfinished string of buffers. This means */
5335 /* that a receive frame started (at least one buffer with */
5336 /* count set to zero) but there is no terminiting buffer */
5337 /* (status set to non-zero). */
5339 while( !buffer_list[end_index].count )
5341 /* Count field has been reset to zero by 16C32. */
5342 /* This buffer is currently in use. */
5344 if ( !start_of_frame_found )
5346 start_of_frame_found = true;
5347 frame_start_index = end_index;
5348 end_of_frame_found = false;
5351 if ( buffer_list[end_index].status )
5353 /* Status field has been set by 16C32. */
5354 /* This is the last buffer of a received frame. */
5356 /* We want to leave the buffers for this frame intact. */
5357 /* Move on to next possible frame. */
5359 start_of_frame_found = false;
5360 end_of_frame_found = true;
5363 /* advance to next buffer entry in linked list */
5365 if ( end_index == info->rx_buffer_count )
5368 if ( start_index == end_index )
5370 /* The entire list has been searched with all Counts == 0 and */
5371 /* all Status == 0. The receive buffers are */
5372 /* completely screwed, reset all receive buffers! */
5373 mgsl_reset_rx_dma_buffers( info );
5374 frame_start_index = 0;
5375 start_of_frame_found = false;
5376 reprogram_dma = true;
5381 if ( start_of_frame_found && !end_of_frame_found )
5383 /* There is an unfinished string of receive DMA buffers */
5384 /* as a result of the receiver overrun. */
5386 /* Reset the buffers for the unfinished frame */
5387 /* and reprogram the receive DMA controller to start */
5388 /* at the 1st buffer of unfinished frame. */
5390 start_index = frame_start_index;
5394 *((unsigned long *)&(info->rx_buffer_list[start_index++].count)) = DMABUFFERSIZE;
5396 /* Adjust index for wrap around. */
5397 if ( start_index == info->rx_buffer_count )
5400 } while( start_index != end_index );
5402 reprogram_dma = true;
5405 if ( reprogram_dma )
5407 usc_UnlatchRxstatusBits(info,RXSTATUS_ALL);
5408 usc_ClearIrqPendingBits(info, RECEIVE_DATA|RECEIVE_STATUS);
5409 usc_UnlatchRxstatusBits(info, RECEIVE_DATA|RECEIVE_STATUS);
5411 usc_EnableReceiver(info,DISABLE_UNCONDITIONAL);
5413 /* This empties the receive FIFO and loads the RCC with RCLR */
5414 usc_OutReg( info, CCSR, (u16)(usc_InReg(info,CCSR) | BIT13) );
5416 /* program 16C32 with physical address of 1st DMA buffer entry */
5417 phys_addr = info->rx_buffer_list[frame_start_index].phys_entry;
5418 usc_OutDmaReg( info, NRARL, (u16)phys_addr );
5419 usc_OutDmaReg( info, NRARU, (u16)(phys_addr >> 16) );
5421 usc_UnlatchRxstatusBits( info, RXSTATUS_ALL );
5422 usc_ClearIrqPendingBits( info, RECEIVE_DATA | RECEIVE_STATUS );
5423 usc_EnableInterrupts( info, RECEIVE_STATUS );
5425 /* 1. Arm End of Buffer (EOB) Receive DMA Interrupt (BIT2 of RDIAR) */
5426 /* 2. Enable Receive DMA Interrupts (BIT1 of DICR) */
5428 usc_OutDmaReg( info, RDIAR, BIT3 | BIT2 );
5429 usc_OutDmaReg( info, DICR, (u16)(usc_InDmaReg(info,DICR) | BIT1) );
5430 usc_DmaCmd( info, DmaCmd_InitRxChannel );
5431 if ( info->params.flags & HDLC_FLAG_AUTO_DCD )
5432 usc_EnableReceiver(info,ENABLE_AUTO_DCD);
5434 usc_EnableReceiver(info,ENABLE_UNCONDITIONAL);
5438 /* This empties the receive FIFO and loads the RCC with RCLR */
5439 usc_OutReg( info, CCSR, (u16)(usc_InReg(info,CCSR) | BIT13) );
5440 usc_RTCmd( info, RTCmd_PurgeRxFifo );
5443 } /* end of usc_process_rxoverrun_sync() */
5445 /* usc_stop_receiver()
5447 * Disable USC receiver
5449 * Arguments: info pointer to device instance data
5450 * Return Value: None
5452 static void usc_stop_receiver( struct mgsl_struct *info )
5454 if (debug_level >= DEBUG_LEVEL_ISR)
5455 printk("%s(%d):usc_stop_receiver(%s)\n",
5456 __FILE__,__LINE__, info->device_name );
5458 /* Disable receive DMA channel. */
5459 /* This also disables receive DMA channel interrupts */
5460 usc_DmaCmd( info, DmaCmd_ResetRxChannel );
5462 usc_UnlatchRxstatusBits( info, RXSTATUS_ALL );
5463 usc_ClearIrqPendingBits( info, RECEIVE_DATA | RECEIVE_STATUS );
5464 usc_DisableInterrupts( info, RECEIVE_DATA | RECEIVE_STATUS );
5466 usc_EnableReceiver(info,DISABLE_UNCONDITIONAL);
5468 /* This empties the receive FIFO and loads the RCC with RCLR */
5469 usc_OutReg( info, CCSR, (u16)(usc_InReg(info,CCSR) | BIT13) );
5470 usc_RTCmd( info, RTCmd_PurgeRxFifo );
5472 info->rx_enabled = false;
5473 info->rx_overflow = false;
5474 info->rx_rcc_underrun = false;
5476 } /* end of stop_receiver() */
5478 /* usc_start_receiver()
5480 * Enable the USC receiver
5482 * Arguments: info pointer to device instance data
5483 * Return Value: None
5485 static void usc_start_receiver( struct mgsl_struct *info )
5489 if (debug_level >= DEBUG_LEVEL_ISR)
5490 printk("%s(%d):usc_start_receiver(%s)\n",
5491 __FILE__,__LINE__, info->device_name );
5493 mgsl_reset_rx_dma_buffers( info );
5494 usc_stop_receiver( info );
5496 usc_OutReg( info, CCSR, (u16)(usc_InReg(info,CCSR) | BIT13) );
5497 usc_RTCmd( info, RTCmd_PurgeRxFifo );
5499 if ( info->params.mode == MGSL_MODE_HDLC ||
5500 info->params.mode == MGSL_MODE_RAW ) {
5501 /* DMA mode Transfers */
5502 /* Program the DMA controller. */
5503 /* Enable the DMA controller end of buffer interrupt. */
5505 /* program 16C32 with physical address of 1st DMA buffer entry */
5506 phys_addr = info->rx_buffer_list[0].phys_entry;
5507 usc_OutDmaReg( info, NRARL, (u16)phys_addr );
5508 usc_OutDmaReg( info, NRARU, (u16)(phys_addr >> 16) );
5510 usc_UnlatchRxstatusBits( info, RXSTATUS_ALL );
5511 usc_ClearIrqPendingBits( info, RECEIVE_DATA | RECEIVE_STATUS );
5512 usc_EnableInterrupts( info, RECEIVE_STATUS );
5514 /* 1. Arm End of Buffer (EOB) Receive DMA Interrupt (BIT2 of RDIAR) */
5515 /* 2. Enable Receive DMA Interrupts (BIT1 of DICR) */
5517 usc_OutDmaReg( info, RDIAR, BIT3 | BIT2 );
5518 usc_OutDmaReg( info, DICR, (u16)(usc_InDmaReg(info,DICR) | BIT1) );
5519 usc_DmaCmd( info, DmaCmd_InitRxChannel );
5520 if ( info->params.flags & HDLC_FLAG_AUTO_DCD )
5521 usc_EnableReceiver(info,ENABLE_AUTO_DCD);
5523 usc_EnableReceiver(info,ENABLE_UNCONDITIONAL);
5525 usc_UnlatchRxstatusBits(info, RXSTATUS_ALL);
5526 usc_ClearIrqPendingBits(info, RECEIVE_DATA | RECEIVE_STATUS);
5527 usc_EnableInterrupts(info, RECEIVE_DATA);
5529 usc_RTCmd( info, RTCmd_PurgeRxFifo );
5530 usc_RCmd( info, RCmd_EnterHuntmode );
5532 usc_EnableReceiver(info,ENABLE_UNCONDITIONAL);
5535 usc_OutReg( info, CCSR, 0x1020 );
5537 info->rx_enabled = true;
5539 } /* end of usc_start_receiver() */
5541 /* usc_start_transmitter()
5543 * Enable the USC transmitter and send a transmit frame if
5544 * one is loaded in the DMA buffers.
5546 * Arguments: info pointer to device instance data
5547 * Return Value: None
5549 static void usc_start_transmitter( struct mgsl_struct *info )
5552 unsigned int FrameSize;
5554 if (debug_level >= DEBUG_LEVEL_ISR)
5555 printk("%s(%d):usc_start_transmitter(%s)\n",
5556 __FILE__,__LINE__, info->device_name );
5558 if ( info->xmit_cnt ) {
5560 /* If auto RTS enabled and RTS is inactive, then assert */
5561 /* RTS and set a flag indicating that the driver should */
5562 /* negate RTS when the transmission completes. */
5564 info->drop_rts_on_tx_done = false;
5566 if ( info->params.flags & HDLC_FLAG_AUTO_RTS ) {
5567 usc_get_serial_signals( info );
5568 if ( !(info->serial_signals & SerialSignal_RTS) ) {
5569 info->serial_signals |= SerialSignal_RTS;
5570 usc_set_serial_signals( info );
5571 info->drop_rts_on_tx_done = true;
5576 if ( info->params.mode == MGSL_MODE_ASYNC ) {
5577 if ( !info->tx_active ) {
5578 usc_UnlatchTxstatusBits(info, TXSTATUS_ALL);
5579 usc_ClearIrqPendingBits(info, TRANSMIT_STATUS + TRANSMIT_DATA);
5580 usc_EnableInterrupts(info, TRANSMIT_DATA);
5581 usc_load_txfifo(info);
5584 /* Disable transmit DMA controller while programming. */
5585 usc_DmaCmd( info, DmaCmd_ResetTxChannel );
5587 /* Transmit DMA buffer is loaded, so program USC */
5588 /* to send the frame contained in the buffers. */
5590 FrameSize = info->tx_buffer_list[info->start_tx_dma_buffer].rcc;
5592 /* if operating in Raw sync mode, reset the rcc component
5593 * of the tx dma buffer entry, otherwise, the serial controller
5594 * will send a closing sync char after this count.
5596 if ( info->params.mode == MGSL_MODE_RAW )
5597 info->tx_buffer_list[info->start_tx_dma_buffer].rcc = 0;
5599 /* Program the Transmit Character Length Register (TCLR) */
5600 /* and clear FIFO (TCC is loaded with TCLR on FIFO clear) */
5601 usc_OutReg( info, TCLR, (u16)FrameSize );
5603 usc_RTCmd( info, RTCmd_PurgeTxFifo );
5605 /* Program the address of the 1st DMA Buffer Entry in linked list */
5606 phys_addr = info->tx_buffer_list[info->start_tx_dma_buffer].phys_entry;
5607 usc_OutDmaReg( info, NTARL, (u16)phys_addr );
5608 usc_OutDmaReg( info, NTARU, (u16)(phys_addr >> 16) );
5610 usc_UnlatchTxstatusBits( info, TXSTATUS_ALL );
5611 usc_ClearIrqPendingBits( info, TRANSMIT_STATUS );
5612 usc_EnableInterrupts( info, TRANSMIT_STATUS );
5614 if ( info->params.mode == MGSL_MODE_RAW &&
5615 info->num_tx_dma_buffers > 1 ) {
5616 /* When running external sync mode, attempt to 'stream' transmit */
5617 /* by filling tx dma buffers as they become available. To do this */
5618 /* we need to enable Tx DMA EOB Status interrupts : */
5620 /* 1. Arm End of Buffer (EOB) Transmit DMA Interrupt (BIT2 of TDIAR) */
5621 /* 2. Enable Transmit DMA Interrupts (BIT0 of DICR) */
5623 usc_OutDmaReg( info, TDIAR, BIT2|BIT3 );
5624 usc_OutDmaReg( info, DICR, (u16)(usc_InDmaReg(info,DICR) | BIT0) );
5627 /* Initialize Transmit DMA Channel */
5628 usc_DmaCmd( info, DmaCmd_InitTxChannel );
5630 usc_TCmd( info, TCmd_SendFrame );
5632 mod_timer(&info->tx_timer, jiffies +
5633 msecs_to_jiffies(5000));
5635 info->tx_active = true;
5638 if ( !info->tx_enabled ) {
5639 info->tx_enabled = true;
5640 if ( info->params.flags & HDLC_FLAG_AUTO_CTS )
5641 usc_EnableTransmitter(info,ENABLE_AUTO_CTS);
5643 usc_EnableTransmitter(info,ENABLE_UNCONDITIONAL);
5646 } /* end of usc_start_transmitter() */
5648 /* usc_stop_transmitter()
5650 * Stops the transmitter and DMA
5652 * Arguments: info pointer to device isntance data
5653 * Return Value: None
5655 static void usc_stop_transmitter( struct mgsl_struct *info )
5657 if (debug_level >= DEBUG_LEVEL_ISR)
5658 printk("%s(%d):usc_stop_transmitter(%s)\n",
5659 __FILE__,__LINE__, info->device_name );
5661 del_timer(&info->tx_timer);
5663 usc_UnlatchTxstatusBits( info, TXSTATUS_ALL );
5664 usc_ClearIrqPendingBits( info, TRANSMIT_STATUS + TRANSMIT_DATA );
5665 usc_DisableInterrupts( info, TRANSMIT_STATUS + TRANSMIT_DATA );
5667 usc_EnableTransmitter(info,DISABLE_UNCONDITIONAL);
5668 usc_DmaCmd( info, DmaCmd_ResetTxChannel );
5669 usc_RTCmd( info, RTCmd_PurgeTxFifo );
5671 info->tx_enabled = false;
5672 info->tx_active = false;
5674 } /* end of usc_stop_transmitter() */
5676 /* usc_load_txfifo()
5678 * Fill the transmit FIFO until the FIFO is full or
5679 * there is no more data to load.
5681 * Arguments: info pointer to device extension (instance data)
5682 * Return Value: None
5684 static void usc_load_txfifo( struct mgsl_struct *info )
5689 if ( !info->xmit_cnt && !info->x_char )
5692 /* Select transmit FIFO status readback in TICR */
5693 usc_TCmd( info, TCmd_SelectTicrTxFifostatus );
5695 /* load the Transmit FIFO until FIFOs full or all data sent */
5697 while( (Fifocount = usc_InReg(info, TICR) >> 8) && info->xmit_cnt ) {
5698 /* there is more space in the transmit FIFO and */
5699 /* there is more data in transmit buffer */
5701 if ( (info->xmit_cnt > 1) && (Fifocount > 1) && !info->x_char ) {
5702 /* write a 16-bit word from transmit buffer to 16C32 */
5704 TwoBytes[0] = info->xmit_buf[info->xmit_tail++];
5705 info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
5706 TwoBytes[1] = info->xmit_buf[info->xmit_tail++];
5707 info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
5709 outw( *((u16 *)TwoBytes), info->io_base + DATAREG);
5711 info->xmit_cnt -= 2;
5712 info->icount.tx += 2;
5714 /* only 1 byte left to transmit or 1 FIFO slot left */
5716 outw( (inw( info->io_base + CCAR) & 0x0780) | (TDR+LSBONLY),
5717 info->io_base + CCAR );
5720 /* transmit pending high priority char */
5721 outw( info->x_char,info->io_base + CCAR );
5724 outw( info->xmit_buf[info->xmit_tail++],info->io_base + CCAR );
5725 info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
5732 } /* end of usc_load_txfifo() */
5736 * Reset the adapter to a known state and prepare it for further use.
5738 * Arguments: info pointer to device instance data
5739 * Return Value: None
5741 static void usc_reset( struct mgsl_struct *info )
5743 if ( info->bus_type == MGSL_BUS_TYPE_PCI ) {
5747 /* Set BIT30 of Misc Control Register */
5748 /* (Local Control Register 0x50) to force reset of USC. */
5750 volatile u32 *MiscCtrl = (u32 *)(info->lcr_base + 0x50);
5751 u32 *LCR0BRDR = (u32 *)(info->lcr_base + 0x28);
5753 info->misc_ctrl_value |= BIT30;
5754 *MiscCtrl = info->misc_ctrl_value;
5757 * Force at least 170ns delay before clearing
5758 * reset bit. Each read from LCR takes at least
5759 * 30ns so 10 times for 300ns to be safe.
5762 readval = *MiscCtrl;
5764 info->misc_ctrl_value &= ~BIT30;
5765 *MiscCtrl = info->misc_ctrl_value;
5767 *LCR0BRDR = BUS_DESCRIPTOR(
5768 1, // Write Strobe Hold (0-3)
5769 2, // Write Strobe Delay (0-3)
5770 2, // Read Strobe Delay (0-3)
5771 0, // NWDD (Write data-data) (0-3)
5772 4, // NWAD (Write Addr-data) (0-31)
5773 0, // NXDA (Read/Write Data-Addr) (0-3)
5774 0, // NRDD (Read Data-Data) (0-3)
5775 5 // NRAD (Read Addr-Data) (0-31)
5779 outb( 0,info->io_base + 8 );
5783 info->loopback_bits = 0;
5784 info->usc_idle_mode = 0;
5787 * Program the Bus Configuration Register (BCR)
5789 * <15> 0 Don't use separate address
5790 * <14..6> 0 reserved
5791 * <5..4> 00 IAckmode = Default, don't care
5792 * <3> 1 Bus Request Totem Pole output
5793 * <2> 1 Use 16 Bit data bus
5794 * <1> 0 IRQ Totem Pole output
5795 * <0> 0 Don't Shift Right Addr
5797 * 0000 0000 0000 1100 = 0x000c
5799 * By writing to io_base + SDPIN the Wait/Ack pin is
5800 * programmed to work as a Wait pin.
5803 outw( 0x000c,info->io_base + SDPIN );
5806 outw( 0,info->io_base );
5807 outw( 0,info->io_base + CCAR );
5809 /* select little endian byte ordering */
5810 usc_RTCmd( info, RTCmd_SelectLittleEndian );
5813 /* Port Control Register (PCR)
5815 * <15..14> 11 Port 7 is Output (~DMAEN, Bit 14 : 0 = Enabled)
5816 * <13..12> 11 Port 6 is Output (~INTEN, Bit 12 : 0 = Enabled)
5817 * <11..10> 00 Port 5 is Input (No Connect, Don't Care)
5818 * <9..8> 00 Port 4 is Input (No Connect, Don't Care)
5819 * <7..6> 11 Port 3 is Output (~RTS, Bit 6 : 0 = Enabled )
5820 * <5..4> 11 Port 2 is Output (~DTR, Bit 4 : 0 = Enabled )
5821 * <3..2> 01 Port 1 is Input (Dedicated RxC)
5822 * <1..0> 01 Port 0 is Input (Dedicated TxC)
5824 * 1111 0000 1111 0101 = 0xf0f5
5827 usc_OutReg( info, PCR, 0xf0f5 );
5831 * Input/Output Control Register
5833 * <15..14> 00 CTS is active low input
5834 * <13..12> 00 DCD is active low input
5835 * <11..10> 00 TxREQ pin is input (DSR)
5836 * <9..8> 00 RxREQ pin is input (RI)
5837 * <7..6> 00 TxD is output (Transmit Data)
5838 * <5..3> 000 TxC Pin in Input (14.7456MHz Clock)
5839 * <2..0> 100 RxC is Output (drive with BRG0)
5841 * 0000 0000 0000 0100 = 0x0004
5844 usc_OutReg( info, IOCR, 0x0004 );
5846 } /* end of usc_reset() */
5848 /* usc_set_async_mode()
5850 * Program adapter for asynchronous communications.
5852 * Arguments: info pointer to device instance data
5853 * Return Value: None
5855 static void usc_set_async_mode( struct mgsl_struct *info )
5859 /* disable interrupts while programming USC */
5860 usc_DisableMasterIrqBit( info );
5862 outw( 0, info->io_base ); /* clear Master Bus Enable (DCAR) */
5863 usc_DmaCmd( info, DmaCmd_ResetAllChannels ); /* disable both DMA channels */
5865 usc_loopback_frame( info );
5867 /* Channel mode Register (CMR)
5869 * <15..14> 00 Tx Sub modes, 00 = 1 Stop Bit
5870 * <13..12> 00 00 = 16X Clock
5871 * <11..8> 0000 Transmitter mode = Asynchronous
5872 * <7..6> 00 reserved?
5873 * <5..4> 00 Rx Sub modes, 00 = 16X Clock
5874 * <3..0> 0000 Receiver mode = Asynchronous
5876 * 0000 0000 0000 0000 = 0x0
5880 if ( info->params.stop_bits != 1 )
5882 usc_OutReg( info, CMR, RegValue );
5885 /* Receiver mode Register (RMR)
5887 * <15..13> 000 encoding = None
5888 * <12..08> 00000 reserved (Sync Only)
5889 * <7..6> 00 Even parity
5890 * <5> 0 parity disabled
5891 * <4..2> 000 Receive Char Length = 8 bits
5892 * <1..0> 00 Disable Receiver
5894 * 0000 0000 0000 0000 = 0x0
5899 if ( info->params.data_bits != 8 )
5900 RegValue |= BIT4 | BIT3 | BIT2;
5902 if ( info->params.parity != ASYNC_PARITY_NONE ) {
5904 if ( info->params.parity != ASYNC_PARITY_ODD )
5908 usc_OutReg( info, RMR, RegValue );
5911 /* Set IRQ trigger level */
5913 usc_RCmd( info, RCmd_SelectRicrIntLevel );
5916 /* Receive Interrupt Control Register (RICR)
5918 * <15..8> ? RxFIFO IRQ Request Level
5920 * Note: For async mode the receive FIFO level must be set
5921 * to 0 to avoid the situation where the FIFO contains fewer bytes
5922 * than the trigger level and no more data is expected.
5924 * <7> 0 Exited Hunt IA (Interrupt Arm)
5925 * <6> 0 Idle Received IA
5926 * <5> 0 Break/Abort IA
5928 * <3> 0 Queued status reflects oldest byte in FIFO
5930 * <1> 0 Rx Overrun IA
5931 * <0> 0 Select TC0 value for readback
5933 * 0000 0000 0100 0000 = 0x0000 + (FIFOLEVEL in MSB)
5936 usc_OutReg( info, RICR, 0x0000 );
5938 usc_UnlatchRxstatusBits( info, RXSTATUS_ALL );
5939 usc_ClearIrqPendingBits( info, RECEIVE_STATUS );
5942 /* Transmit mode Register (TMR)
5944 * <15..13> 000 encoding = None
5945 * <12..08> 00000 reserved (Sync Only)
5946 * <7..6> 00 Transmit parity Even
5947 * <5> 0 Transmit parity Disabled
5948 * <4..2> 000 Tx Char Length = 8 bits
5949 * <1..0> 00 Disable Transmitter
5951 * 0000 0000 0000 0000 = 0x0
5956 if ( info->params.data_bits != 8 )
5957 RegValue |= BIT4 | BIT3 | BIT2;
5959 if ( info->params.parity != ASYNC_PARITY_NONE ) {
5961 if ( info->params.parity != ASYNC_PARITY_ODD )
5965 usc_OutReg( info, TMR, RegValue );
5967 usc_set_txidle( info );
5970 /* Set IRQ trigger level */
5972 usc_TCmd( info, TCmd_SelectTicrIntLevel );
5975 /* Transmit Interrupt Control Register (TICR)
5977 * <15..8> ? Transmit FIFO IRQ Level
5978 * <7> 0 Present IA (Interrupt Arm)
5979 * <6> 1 Idle Sent IA
5980 * <5> 0 Abort Sent IA
5981 * <4> 0 EOF/EOM Sent IA
5983 * <2> 0 1 = Wait for SW Trigger to Start Frame
5984 * <1> 0 Tx Underrun IA
5985 * <0> 0 TC0 constant on read back
5987 * 0000 0000 0100 0000 = 0x0040
5990 usc_OutReg( info, TICR, 0x1f40 );
5992 usc_UnlatchTxstatusBits( info, TXSTATUS_ALL );
5993 usc_ClearIrqPendingBits( info, TRANSMIT_STATUS );
5995 usc_enable_async_clock( info, info->params.data_rate );
5998 /* Channel Control/status Register (CCSR)
6000 * <15> X RCC FIFO Overflow status (RO)
6001 * <14> X RCC FIFO Not Empty status (RO)
6002 * <13> 0 1 = Clear RCC FIFO (WO)
6003 * <12> X DPLL in Sync status (RO)
6004 * <11> X DPLL 2 Missed Clocks status (RO)
6005 * <10> X DPLL 1 Missed Clock status (RO)
6006 * <9..8> 00 DPLL Resync on rising and falling edges (RW)
6007 * <7> X SDLC Loop On status (RO)
6008 * <6> X SDLC Loop Send status (RO)
6009 * <5> 1 Bypass counters for TxClk and RxClk (RW)
6010 * <4..2> 000 Last Char of SDLC frame has 8 bits (RW)
6011 * <1..0> 00 reserved
6013 * 0000 0000 0010 0000 = 0x0020
6016 usc_OutReg( info, CCSR, 0x0020 );
6018 usc_DisableInterrupts( info, TRANSMIT_STATUS + TRANSMIT_DATA +
6019 RECEIVE_DATA + RECEIVE_STATUS );
6021 usc_ClearIrqPendingBits( info, TRANSMIT_STATUS + TRANSMIT_DATA +
6022 RECEIVE_DATA + RECEIVE_STATUS );
6024 usc_EnableMasterIrqBit( info );
6026 if (info->bus_type == MGSL_BUS_TYPE_ISA) {
6027 /* Enable INTEN (Port 6, Bit12) */
6028 /* This connects the IRQ request signal to the ISA bus */
6029 usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT13) & ~BIT12));
6032 if (info->params.loopback) {
6033 info->loopback_bits = 0x300;
6034 outw(0x0300, info->io_base + CCAR);
6037 } /* end of usc_set_async_mode() */
6039 /* usc_loopback_frame()
6041 * Loop back a small (2 byte) dummy SDLC frame.
6042 * Interrupts and DMA are NOT used. The purpose of this is to
6043 * clear any 'stale' status info left over from running in async mode.
6045 * The 16C32 shows the strange behaviour of marking the 1st
6046 * received SDLC frame with a CRC error even when there is no
6047 * CRC error. To get around this a small dummy from of 2 bytes
6048 * is looped back when switching from async to sync mode.
6050 * Arguments: info pointer to device instance data
6051 * Return Value: None
6053 static void usc_loopback_frame( struct mgsl_struct *info )
6056 unsigned long oldmode = info->params.mode;
6058 info->params.mode = MGSL_MODE_HDLC;
6060 usc_DisableMasterIrqBit( info );
6062 usc_set_sdlc_mode( info );
6063 usc_enable_loopback( info, 1 );
6065 /* Write 16-bit Time Constant for BRG0 */
6066 usc_OutReg( info, TC0R, 0 );
6068 /* Channel Control Register (CCR)
6070 * <15..14> 00 Don't use 32-bit Tx Control Blocks (TCBs)
6071 * <13> 0 Trigger Tx on SW Command Disabled
6072 * <12> 0 Flag Preamble Disabled
6073 * <11..10> 00 Preamble Length = 8-Bits
6074 * <9..8> 01 Preamble Pattern = flags
6075 * <7..6> 10 Don't use 32-bit Rx status Blocks (RSBs)
6076 * <5> 0 Trigger Rx on SW Command Disabled
6079 * 0000 0001 0000 0000 = 0x0100
6082 usc_OutReg( info, CCR, 0x0100 );
6084 /* SETUP RECEIVER */
6085 usc_RTCmd( info, RTCmd_PurgeRxFifo );
6086 usc_EnableReceiver(info,ENABLE_UNCONDITIONAL);
6088 /* SETUP TRANSMITTER */
6089 /* Program the Transmit Character Length Register (TCLR) */
6090 /* and clear FIFO (TCC is loaded with TCLR on FIFO clear) */
6091 usc_OutReg( info, TCLR, 2 );
6092 usc_RTCmd( info, RTCmd_PurgeTxFifo );
6094 /* unlatch Tx status bits, and start transmit channel. */
6095 usc_UnlatchTxstatusBits(info,TXSTATUS_ALL);
6096 outw(0,info->io_base + DATAREG);
6098 /* ENABLE TRANSMITTER */
6099 usc_TCmd( info, TCmd_SendFrame );
6100 usc_EnableTransmitter(info,ENABLE_UNCONDITIONAL);
6102 /* WAIT FOR RECEIVE COMPLETE */
6103 for (i=0 ; i<1000 ; i++)
6104 if (usc_InReg( info, RCSR ) & (BIT8 | BIT4 | BIT3 | BIT1))
6107 /* clear Internal Data loopback mode */
6108 usc_enable_loopback(info, 0);
6110 usc_EnableMasterIrqBit(info);
6112 info->params.mode = oldmode;
6114 } /* end of usc_loopback_frame() */
6116 /* usc_set_sync_mode() Programs the USC for SDLC communications.
6118 * Arguments: info pointer to adapter info structure
6119 * Return Value: None
6121 static void usc_set_sync_mode( struct mgsl_struct *info )
6123 usc_loopback_frame( info );
6124 usc_set_sdlc_mode( info );
6126 if (info->bus_type == MGSL_BUS_TYPE_ISA) {
6127 /* Enable INTEN (Port 6, Bit12) */
6128 /* This connects the IRQ request signal to the ISA bus */
6129 usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT13) & ~BIT12));
6132 usc_enable_aux_clock(info, info->params.clock_speed);
6134 if (info->params.loopback)
6135 usc_enable_loopback(info,1);
6137 } /* end of mgsl_set_sync_mode() */
6139 /* usc_set_txidle() Set the HDLC idle mode for the transmitter.
6141 * Arguments: info pointer to device instance data
6142 * Return Value: None
6144 static void usc_set_txidle( struct mgsl_struct *info )
6146 u16 usc_idle_mode = IDLEMODE_FLAGS;
6148 /* Map API idle mode to USC register bits */
6150 switch( info->idle_mode ){
6151 case HDLC_TXIDLE_FLAGS: usc_idle_mode = IDLEMODE_FLAGS; break;
6152 case HDLC_TXIDLE_ALT_ZEROS_ONES: usc_idle_mode = IDLEMODE_ALT_ONE_ZERO; break;
6153 case HDLC_TXIDLE_ZEROS: usc_idle_mode = IDLEMODE_ZERO; break;
6154 case HDLC_TXIDLE_ONES: usc_idle_mode = IDLEMODE_ONE; break;
6155 case HDLC_TXIDLE_ALT_MARK_SPACE: usc_idle_mode = IDLEMODE_ALT_MARK_SPACE; break;
6156 case HDLC_TXIDLE_SPACE: usc_idle_mode = IDLEMODE_SPACE; break;
6157 case HDLC_TXIDLE_MARK: usc_idle_mode = IDLEMODE_MARK; break;
6160 info->usc_idle_mode = usc_idle_mode;
6161 //usc_OutReg(info, TCSR, usc_idle_mode);
6162 info->tcsr_value &= ~IDLEMODE_MASK; /* clear idle mode bits */
6163 info->tcsr_value += usc_idle_mode;
6164 usc_OutReg(info, TCSR, info->tcsr_value);
6167 * if SyncLink WAN adapter is running in external sync mode, the
6168 * transmitter has been set to Monosync in order to try to mimic
6169 * a true raw outbound bit stream. Monosync still sends an open/close
6170 * sync char at the start/end of a frame. Try to match those sync
6171 * patterns to the idle mode set here
6173 if ( info->params.mode == MGSL_MODE_RAW ) {
6174 unsigned char syncpat = 0;
6175 switch( info->idle_mode ) {
6176 case HDLC_TXIDLE_FLAGS:
6179 case HDLC_TXIDLE_ALT_ZEROS_ONES:
6182 case HDLC_TXIDLE_ZEROS:
6183 case HDLC_TXIDLE_SPACE:
6186 case HDLC_TXIDLE_ONES:
6187 case HDLC_TXIDLE_MARK:
6190 case HDLC_TXIDLE_ALT_MARK_SPACE:
6195 usc_SetTransmitSyncChars(info,syncpat,syncpat);
6198 } /* end of usc_set_txidle() */
6200 /* usc_get_serial_signals()
6202 * Query the adapter for the state of the V24 status (input) signals.
6204 * Arguments: info pointer to device instance data
6205 * Return Value: None
6207 static void usc_get_serial_signals( struct mgsl_struct *info )
6211 /* clear all serial signals except RTS and DTR */
6212 info->serial_signals &= SerialSignal_RTS | SerialSignal_DTR;
6214 /* Read the Misc Interrupt status Register (MISR) to get */
6215 /* the V24 status signals. */
6217 status = usc_InReg( info, MISR );
6219 /* set serial signal bits to reflect MISR */
6221 if ( status & MISCSTATUS_CTS )
6222 info->serial_signals |= SerialSignal_CTS;
6224 if ( status & MISCSTATUS_DCD )
6225 info->serial_signals |= SerialSignal_DCD;
6227 if ( status & MISCSTATUS_RI )
6228 info->serial_signals |= SerialSignal_RI;
6230 if ( status & MISCSTATUS_DSR )
6231 info->serial_signals |= SerialSignal_DSR;
6233 } /* end of usc_get_serial_signals() */
6235 /* usc_set_serial_signals()
6237 * Set the state of RTS and DTR based on contents of
6238 * serial_signals member of device extension.
6240 * Arguments: info pointer to device instance data
6241 * Return Value: None
6243 static void usc_set_serial_signals( struct mgsl_struct *info )
6246 unsigned char V24Out = info->serial_signals;
6248 /* get the current value of the Port Control Register (PCR) */
6250 Control = usc_InReg( info, PCR );
6252 if ( V24Out & SerialSignal_RTS )
6257 if ( V24Out & SerialSignal_DTR )
6262 usc_OutReg( info, PCR, Control );
6264 } /* end of usc_set_serial_signals() */
6266 /* usc_enable_async_clock()
6268 * Enable the async clock at the specified frequency.
6270 * Arguments: info pointer to device instance data
6271 * data_rate data rate of clock in bps
6272 * 0 disables the AUX clock.
6273 * Return Value: None
6275 static void usc_enable_async_clock( struct mgsl_struct *info, u32 data_rate )
6279 * Clock mode Control Register (CMCR)
6281 * <15..14> 00 counter 1 Disabled
6282 * <13..12> 00 counter 0 Disabled
6283 * <11..10> 11 BRG1 Input is TxC Pin
6284 * <9..8> 11 BRG0 Input is TxC Pin
6285 * <7..6> 01 DPLL Input is BRG1 Output
6286 * <5..3> 100 TxCLK comes from BRG0
6287 * <2..0> 100 RxCLK comes from BRG0
6289 * 0000 1111 0110 0100 = 0x0f64
6292 usc_OutReg( info, CMCR, 0x0f64 );
6296 * Write 16-bit Time Constant for BRG0
6297 * Time Constant = (ClkSpeed / data_rate) - 1
6298 * ClkSpeed = 921600 (ISA), 691200 (PCI)
6301 if ( info->bus_type == MGSL_BUS_TYPE_PCI )
6302 usc_OutReg( info, TC0R, (u16)((691200/data_rate) - 1) );
6304 usc_OutReg( info, TC0R, (u16)((921600/data_rate) - 1) );
6308 * Hardware Configuration Register (HCR)
6309 * Clear Bit 1, BRG0 mode = Continuous
6310 * Set Bit 0 to enable BRG0.
6313 usc_OutReg( info, HCR,
6314 (u16)((usc_InReg( info, HCR ) & ~BIT1) | BIT0) );
6317 /* Input/Output Control Reg, <2..0> = 100, Drive RxC pin with BRG0 */
6319 usc_OutReg( info, IOCR,
6320 (u16)((usc_InReg(info, IOCR) & 0xfff8) | 0x0004) );
6322 /* data rate == 0 so turn off BRG0 */
6323 usc_OutReg( info, HCR, (u16)(usc_InReg( info, HCR ) & ~BIT0) );
6326 } /* end of usc_enable_async_clock() */
6329 * Buffer Structures:
6331 * Normal memory access uses virtual addresses that can make discontiguous
6332 * physical memory pages appear to be contiguous in the virtual address
6333 * space (the processors memory mapping handles the conversions).
6335 * DMA transfers require physically contiguous memory. This is because
6336 * the DMA system controller and DMA bus masters deal with memory using
6337 * only physical addresses.
6339 * This causes a problem under Windows NT when large DMA buffers are
6340 * needed. Fragmentation of the nonpaged pool prevents allocations of
6341 * physically contiguous buffers larger than the PAGE_SIZE.
6343 * However the 16C32 supports Bus Master Scatter/Gather DMA which
6344 * allows DMA transfers to physically discontiguous buffers. Information
6345 * about each data transfer buffer is contained in a memory structure
6346 * called a 'buffer entry'. A list of buffer entries is maintained
6347 * to track and control the use of the data transfer buffers.
6349 * To support this strategy we will allocate sufficient PAGE_SIZE
6350 * contiguous memory buffers to allow for the total required buffer
6353 * The 16C32 accesses the list of buffer entries using Bus Master
6354 * DMA. Control information is read from the buffer entries by the
6355 * 16C32 to control data transfers. status information is written to
6356 * the buffer entries by the 16C32 to indicate the status of completed
6359 * The CPU writes control information to the buffer entries to control
6360 * the 16C32 and reads status information from the buffer entries to
6361 * determine information about received and transmitted frames.
6363 * Because the CPU and 16C32 (adapter) both need simultaneous access
6364 * to the buffer entries, the buffer entry memory is allocated with
6365 * HalAllocateCommonBuffer(). This restricts the size of the buffer
6366 * entry list to PAGE_SIZE.
6368 * The actual data buffers on the other hand will only be accessed
6369 * by the CPU or the adapter but not by both simultaneously. This allows
6370 * Scatter/Gather packet based DMA procedures for using physically
6371 * discontiguous pages.
6375 * mgsl_reset_tx_dma_buffers()
6377 * Set the count for all transmit buffers to 0 to indicate the
6378 * buffer is available for use and set the current buffer to the
6379 * first buffer. This effectively makes all buffers free and
6380 * discards any data in buffers.
6382 * Arguments: info pointer to device instance data
6383 * Return Value: None
6385 static void mgsl_reset_tx_dma_buffers( struct mgsl_struct *info )
6389 for ( i = 0; i < info->tx_buffer_count; i++ ) {
6390 *((unsigned long *)&(info->tx_buffer_list[i].count)) = 0;
6393 info->current_tx_buffer = 0;
6394 info->start_tx_dma_buffer = 0;
6395 info->tx_dma_buffers_used = 0;
6397 info->get_tx_holding_index = 0;
6398 info->put_tx_holding_index = 0;
6399 info->tx_holding_count = 0;
6401 } /* end of mgsl_reset_tx_dma_buffers() */
6404 * num_free_tx_dma_buffers()
6406 * returns the number of free tx dma buffers available
6408 * Arguments: info pointer to device instance data
6409 * Return Value: number of free tx dma buffers
6411 static int num_free_tx_dma_buffers(struct mgsl_struct *info)
6413 return info->tx_buffer_count - info->tx_dma_buffers_used;
6417 * mgsl_reset_rx_dma_buffers()
6419 * Set the count for all receive buffers to DMABUFFERSIZE
6420 * and set the current buffer to the first buffer. This effectively
6421 * makes all buffers free and discards any data in buffers.
6423 * Arguments: info pointer to device instance data
6424 * Return Value: None
6426 static void mgsl_reset_rx_dma_buffers( struct mgsl_struct *info )
6430 for ( i = 0; i < info->rx_buffer_count; i++ ) {
6431 *((unsigned long *)&(info->rx_buffer_list[i].count)) = DMABUFFERSIZE;
6432 // info->rx_buffer_list[i].count = DMABUFFERSIZE;
6433 // info->rx_buffer_list[i].status = 0;
6436 info->current_rx_buffer = 0;
6438 } /* end of mgsl_reset_rx_dma_buffers() */
6441 * mgsl_free_rx_frame_buffers()
6443 * Free the receive buffers used by a received SDLC
6444 * frame such that the buffers can be reused.
6448 * info pointer to device instance data
6449 * StartIndex index of 1st receive buffer of frame
6450 * EndIndex index of last receive buffer of frame
6452 * Return Value: None
6454 static void mgsl_free_rx_frame_buffers( struct mgsl_struct *info, unsigned int StartIndex, unsigned int EndIndex )
6457 DMABUFFERENTRY *pBufEntry;
6460 /* Starting with 1st buffer entry of the frame clear the status */
6461 /* field and set the count field to DMA Buffer Size. */
6466 pBufEntry = &(info->rx_buffer_list[Index]);
6468 if ( Index == EndIndex ) {
6469 /* This is the last buffer of the frame! */
6473 /* reset current buffer for reuse */
6474 // pBufEntry->status = 0;
6475 // pBufEntry->count = DMABUFFERSIZE;
6476 *((unsigned long *)&(pBufEntry->count)) = DMABUFFERSIZE;
6478 /* advance to next buffer entry in linked list */
6480 if ( Index == info->rx_buffer_count )
6484 /* set current buffer to next buffer after last buffer of frame */
6485 info->current_rx_buffer = Index;
6487 } /* end of free_rx_frame_buffers() */
6489 /* mgsl_get_rx_frame()
6491 * This function attempts to return a received SDLC frame from the
6492 * receive DMA buffers. Only frames received without errors are returned.
6494 * Arguments: info pointer to device extension
6495 * Return Value: true if frame returned, otherwise false
6497 static bool mgsl_get_rx_frame(struct mgsl_struct *info)
6499 unsigned int StartIndex, EndIndex; /* index of 1st and last buffers of Rx frame */
6500 unsigned short status;
6501 DMABUFFERENTRY *pBufEntry;
6502 unsigned int framesize = 0;
6503 bool ReturnCode = false;
6504 unsigned long flags;
6505 struct tty_struct *tty = info->port.tty;
6506 bool return_frame = false;
6509 * current_rx_buffer points to the 1st buffer of the next available
6510 * receive frame. To find the last buffer of the frame look for
6511 * a non-zero status field in the buffer entries. (The status
6512 * field is set by the 16C32 after completing a receive frame.
6515 StartIndex = EndIndex = info->current_rx_buffer;
6517 while( !info->rx_buffer_list[EndIndex].status ) {
6519 * If the count field of the buffer entry is non-zero then
6520 * this buffer has not been used. (The 16C32 clears the count
6521 * field when it starts using the buffer.) If an unused buffer
6522 * is encountered then there are no frames available.
6525 if ( info->rx_buffer_list[EndIndex].count )
6528 /* advance to next buffer entry in linked list */
6530 if ( EndIndex == info->rx_buffer_count )
6533 /* if entire list searched then no frame available */
6534 if ( EndIndex == StartIndex ) {
6535 /* If this occurs then something bad happened,
6536 * all buffers have been 'used' but none mark
6537 * the end of a frame. Reset buffers and receiver.
6540 if ( info->rx_enabled ){
6541 spin_lock_irqsave(&info->irq_spinlock,flags);
6542 usc_start_receiver(info);
6543 spin_unlock_irqrestore(&info->irq_spinlock,flags);
6550 /* check status of receive frame */
6552 status = info->rx_buffer_list[EndIndex].status;
6554 if ( status & (RXSTATUS_SHORT_FRAME | RXSTATUS_OVERRUN |
6555 RXSTATUS_CRC_ERROR | RXSTATUS_ABORT) ) {
6556 if ( status & RXSTATUS_SHORT_FRAME )
6557 info->icount.rxshort++;
6558 else if ( status & RXSTATUS_ABORT )
6559 info->icount.rxabort++;
6560 else if ( status & RXSTATUS_OVERRUN )
6561 info->icount.rxover++;
6563 info->icount.rxcrc++;
6564 if ( info->params.crc_type & HDLC_CRC_RETURN_EX )
6565 return_frame = true;
6568 #if SYNCLINK_GENERIC_HDLC
6570 info->netdev->stats.rx_errors++;
6571 info->netdev->stats.rx_frame_errors++;
6575 return_frame = true;
6577 if ( return_frame ) {
6578 /* receive frame has no errors, get frame size.
6579 * The frame size is the starting value of the RCC (which was
6580 * set to 0xffff) minus the ending value of the RCC (decremented
6581 * once for each receive character) minus 2 for the 16-bit CRC.
6584 framesize = RCLRVALUE - info->rx_buffer_list[EndIndex].rcc;
6586 /* adjust frame size for CRC if any */
6587 if ( info->params.crc_type == HDLC_CRC_16_CCITT )
6589 else if ( info->params.crc_type == HDLC_CRC_32_CCITT )
6593 if ( debug_level >= DEBUG_LEVEL_BH )
6594 printk("%s(%d):mgsl_get_rx_frame(%s) status=%04X size=%d\n",
6595 __FILE__,__LINE__,info->device_name,status,framesize);
6597 if ( debug_level >= DEBUG_LEVEL_DATA )
6598 mgsl_trace_block(info,info->rx_buffer_list[StartIndex].virt_addr,
6599 min_t(int, framesize, DMABUFFERSIZE),0);
6602 if ( ( (info->params.crc_type & HDLC_CRC_RETURN_EX) &&
6603 ((framesize+1) > info->max_frame_size) ) ||
6604 (framesize > info->max_frame_size) )
6605 info->icount.rxlong++;
6607 /* copy dma buffer(s) to contiguous intermediate buffer */
6608 int copy_count = framesize;
6609 int index = StartIndex;
6610 unsigned char *ptmp = info->intermediate_rxbuffer;
6612 if ( !(status & RXSTATUS_CRC_ERROR))
6613 info->icount.rxok++;
6617 if ( copy_count > DMABUFFERSIZE )
6618 partial_count = DMABUFFERSIZE;
6620 partial_count = copy_count;
6622 pBufEntry = &(info->rx_buffer_list[index]);
6623 memcpy( ptmp, pBufEntry->virt_addr, partial_count );
6624 ptmp += partial_count;
6625 copy_count -= partial_count;
6627 if ( ++index == info->rx_buffer_count )
6631 if ( info->params.crc_type & HDLC_CRC_RETURN_EX ) {
6633 *ptmp = (status & RXSTATUS_CRC_ERROR ?
6637 if ( debug_level >= DEBUG_LEVEL_DATA )
6638 printk("%s(%d):mgsl_get_rx_frame(%s) rx frame status=%d\n",
6639 __FILE__,__LINE__,info->device_name,
6643 #if SYNCLINK_GENERIC_HDLC
6645 hdlcdev_rx(info,info->intermediate_rxbuffer,framesize);
6648 ldisc_receive_buf(tty, info->intermediate_rxbuffer, info->flag_buf, framesize);
6651 /* Free the buffers used by this frame. */
6652 mgsl_free_rx_frame_buffers( info, StartIndex, EndIndex );
6658 if ( info->rx_enabled && info->rx_overflow ) {
6659 /* The receiver needs to restarted because of
6660 * a receive overflow (buffer or FIFO). If the
6661 * receive buffers are now empty, then restart receiver.
6664 if ( !info->rx_buffer_list[EndIndex].status &&
6665 info->rx_buffer_list[EndIndex].count ) {
6666 spin_lock_irqsave(&info->irq_spinlock,flags);
6667 usc_start_receiver(info);
6668 spin_unlock_irqrestore(&info->irq_spinlock,flags);
6674 } /* end of mgsl_get_rx_frame() */
6676 /* mgsl_get_raw_rx_frame()
6678 * This function attempts to return a received frame from the
6679 * receive DMA buffers when running in external loop mode. In this mode,
6680 * we will return at most one DMABUFFERSIZE frame to the application.
6681 * The USC receiver is triggering off of DCD going active to start a new
6682 * frame, and DCD going inactive to terminate the frame (similar to
6683 * processing a closing flag character).
6685 * In this routine, we will return DMABUFFERSIZE "chunks" at a time.
6686 * If DCD goes inactive, the last Rx DMA Buffer will have a non-zero
6687 * status field and the RCC field will indicate the length of the
6688 * entire received frame. We take this RCC field and get the modulus
6689 * of RCC and DMABUFFERSIZE to determine if number of bytes in the
6690 * last Rx DMA buffer and return that last portion of the frame.
6692 * Arguments: info pointer to device extension
6693 * Return Value: true if frame returned, otherwise false
6695 static bool mgsl_get_raw_rx_frame(struct mgsl_struct *info)
6697 unsigned int CurrentIndex, NextIndex;
6698 unsigned short status;
6699 DMABUFFERENTRY *pBufEntry;
6700 unsigned int framesize = 0;
6701 bool ReturnCode = false;
6702 unsigned long flags;
6703 struct tty_struct *tty = info->port.tty;
6706 * current_rx_buffer points to the 1st buffer of the next available
6707 * receive frame. The status field is set by the 16C32 after
6708 * completing a receive frame. If the status field of this buffer
6709 * is zero, either the USC is still filling this buffer or this
6710 * is one of a series of buffers making up a received frame.
6712 * If the count field of this buffer is zero, the USC is either
6713 * using this buffer or has used this buffer. Look at the count
6714 * field of the next buffer. If that next buffer's count is
6715 * non-zero, the USC is still actively using the current buffer.
6716 * Otherwise, if the next buffer's count field is zero, the
6717 * current buffer is complete and the USC is using the next
6720 CurrentIndex = NextIndex = info->current_rx_buffer;
6722 if ( NextIndex == info->rx_buffer_count )
6725 if ( info->rx_buffer_list[CurrentIndex].status != 0 ||
6726 (info->rx_buffer_list[CurrentIndex].count == 0 &&
6727 info->rx_buffer_list[NextIndex].count == 0)) {
6729 * Either the status field of this dma buffer is non-zero
6730 * (indicating the last buffer of a receive frame) or the next
6731 * buffer is marked as in use -- implying this buffer is complete
6732 * and an intermediate buffer for this received frame.
6735 status = info->rx_buffer_list[CurrentIndex].status;
6737 if ( status & (RXSTATUS_SHORT_FRAME | RXSTATUS_OVERRUN |
6738 RXSTATUS_CRC_ERROR | RXSTATUS_ABORT) ) {
6739 if ( status & RXSTATUS_SHORT_FRAME )
6740 info->icount.rxshort++;
6741 else if ( status & RXSTATUS_ABORT )
6742 info->icount.rxabort++;
6743 else if ( status & RXSTATUS_OVERRUN )
6744 info->icount.rxover++;
6746 info->icount.rxcrc++;
6750 * A receive frame is available, get frame size and status.
6752 * The frame size is the starting value of the RCC (which was
6753 * set to 0xffff) minus the ending value of the RCC (decremented
6754 * once for each receive character) minus 2 or 4 for the 16-bit
6757 * If the status field is zero, this is an intermediate buffer.
6760 * If the DMA Buffer Entry's Status field is non-zero, the
6761 * receive operation completed normally (ie: DCD dropped). The
6762 * RCC field is valid and holds the received frame size.
6763 * It is possible that the RCC field will be zero on a DMA buffer
6764 * entry with a non-zero status. This can occur if the total
6765 * frame size (number of bytes between the time DCD goes active
6766 * to the time DCD goes inactive) exceeds 65535 bytes. In this
6767 * case the 16C32 has underrun on the RCC count and appears to
6768 * stop updating this counter to let us know the actual received
6769 * frame size. If this happens (non-zero status and zero RCC),
6770 * simply return the entire RxDMA Buffer
6774 * In the event that the final RxDMA Buffer is
6775 * terminated with a non-zero status and the RCC
6776 * field is zero, we interpret this as the RCC
6777 * having underflowed (received frame > 65535 bytes).
6779 * Signal the event to the user by passing back
6780 * a status of RxStatus_CrcError returning the full
6781 * buffer and let the app figure out what data is
6784 if ( info->rx_buffer_list[CurrentIndex].rcc )
6785 framesize = RCLRVALUE - info->rx_buffer_list[CurrentIndex].rcc;
6787 framesize = DMABUFFERSIZE;
6790 framesize = DMABUFFERSIZE;
6793 if ( framesize > DMABUFFERSIZE ) {
6795 * if running in raw sync mode, ISR handler for
6796 * End Of Buffer events terminates all buffers at 4K.
6797 * If this frame size is said to be >4K, get the
6798 * actual number of bytes of the frame in this buffer.
6800 framesize = framesize % DMABUFFERSIZE;
6804 if ( debug_level >= DEBUG_LEVEL_BH )
6805 printk("%s(%d):mgsl_get_raw_rx_frame(%s) status=%04X size=%d\n",
6806 __FILE__,__LINE__,info->device_name,status,framesize);
6808 if ( debug_level >= DEBUG_LEVEL_DATA )
6809 mgsl_trace_block(info,info->rx_buffer_list[CurrentIndex].virt_addr,
6810 min_t(int, framesize, DMABUFFERSIZE),0);
6813 /* copy dma buffer(s) to contiguous intermediate buffer */
6814 /* NOTE: we never copy more than DMABUFFERSIZE bytes */
6816 pBufEntry = &(info->rx_buffer_list[CurrentIndex]);
6817 memcpy( info->intermediate_rxbuffer, pBufEntry->virt_addr, framesize);
6818 info->icount.rxok++;
6820 ldisc_receive_buf(tty, info->intermediate_rxbuffer, info->flag_buf, framesize);
6823 /* Free the buffers used by this frame. */
6824 mgsl_free_rx_frame_buffers( info, CurrentIndex, CurrentIndex );
6830 if ( info->rx_enabled && info->rx_overflow ) {
6831 /* The receiver needs to restarted because of
6832 * a receive overflow (buffer or FIFO). If the
6833 * receive buffers are now empty, then restart receiver.
6836 if ( !info->rx_buffer_list[CurrentIndex].status &&
6837 info->rx_buffer_list[CurrentIndex].count ) {
6838 spin_lock_irqsave(&info->irq_spinlock,flags);
6839 usc_start_receiver(info);
6840 spin_unlock_irqrestore(&info->irq_spinlock,flags);
6846 } /* end of mgsl_get_raw_rx_frame() */
6848 /* mgsl_load_tx_dma_buffer()
6850 * Load the transmit DMA buffer with the specified data.
6854 * info pointer to device extension
6855 * Buffer pointer to buffer containing frame to load
6856 * BufferSize size in bytes of frame in Buffer
6858 * Return Value: None
6860 static void mgsl_load_tx_dma_buffer(struct mgsl_struct *info,
6861 const char *Buffer, unsigned int BufferSize)
6863 unsigned short Copycount;
6865 DMABUFFERENTRY *pBufEntry;
6867 if ( debug_level >= DEBUG_LEVEL_DATA )
6868 mgsl_trace_block(info,Buffer, min_t(int, BufferSize, DMABUFFERSIZE), 1);
6870 if (info->params.flags & HDLC_FLAG_HDLC_LOOPMODE) {
6871 /* set CMR:13 to start transmit when
6872 * next GoAhead (abort) is received
6874 info->cmr_value |= BIT13;
6877 /* begin loading the frame in the next available tx dma
6878 * buffer, remember it's starting location for setting
6879 * up tx dma operation
6881 i = info->current_tx_buffer;
6882 info->start_tx_dma_buffer = i;
6884 /* Setup the status and RCC (Frame Size) fields of the 1st */
6885 /* buffer entry in the transmit DMA buffer list. */
6887 info->tx_buffer_list[i].status = info->cmr_value & 0xf000;
6888 info->tx_buffer_list[i].rcc = BufferSize;
6889 info->tx_buffer_list[i].count = BufferSize;
6891 /* Copy frame data from 1st source buffer to the DMA buffers. */
6892 /* The frame data may span multiple DMA buffers. */
6894 while( BufferSize ){
6895 /* Get a pointer to next DMA buffer entry. */
6896 pBufEntry = &info->tx_buffer_list[i++];
6898 if ( i == info->tx_buffer_count )
6901 /* Calculate the number of bytes that can be copied from */
6902 /* the source buffer to this DMA buffer. */
6903 if ( BufferSize > DMABUFFERSIZE )
6904 Copycount = DMABUFFERSIZE;
6906 Copycount = BufferSize;
6908 /* Actually copy data from source buffer to DMA buffer. */
6909 /* Also set the data count for this individual DMA buffer. */
6910 if ( info->bus_type == MGSL_BUS_TYPE_PCI )
6911 mgsl_load_pci_memory(pBufEntry->virt_addr, Buffer,Copycount);
6913 memcpy(pBufEntry->virt_addr, Buffer, Copycount);
6915 pBufEntry->count = Copycount;
6917 /* Advance source pointer and reduce remaining data count. */
6918 Buffer += Copycount;
6919 BufferSize -= Copycount;
6921 ++info->tx_dma_buffers_used;
6924 /* remember next available tx dma buffer */
6925 info->current_tx_buffer = i;
6927 } /* end of mgsl_load_tx_dma_buffer() */
6930 * mgsl_register_test()
6932 * Performs a register test of the 16C32.
6934 * Arguments: info pointer to device instance data
6935 * Return Value: true if test passed, otherwise false
6937 static bool mgsl_register_test( struct mgsl_struct *info )
6939 static unsigned short BitPatterns[] =
6940 { 0x0000, 0xffff, 0xaaaa, 0x5555, 0x1234, 0x6969, 0x9696, 0x0f0f };
6941 static unsigned int Patterncount = ARRAY_SIZE(BitPatterns);
6944 unsigned long flags;
6946 spin_lock_irqsave(&info->irq_spinlock,flags);
6949 /* Verify the reset state of some registers. */
6951 if ( (usc_InReg( info, SICR ) != 0) ||
6952 (usc_InReg( info, IVR ) != 0) ||
6953 (usc_InDmaReg( info, DIVR ) != 0) ){
6958 /* Write bit patterns to various registers but do it out of */
6959 /* sync, then read back and verify values. */
6961 for ( i = 0 ; i < Patterncount ; i++ ) {
6962 usc_OutReg( info, TC0R, BitPatterns[i] );
6963 usc_OutReg( info, TC1R, BitPatterns[(i+1)%Patterncount] );
6964 usc_OutReg( info, TCLR, BitPatterns[(i+2)%Patterncount] );
6965 usc_OutReg( info, RCLR, BitPatterns[(i+3)%Patterncount] );
6966 usc_OutReg( info, RSR, BitPatterns[(i+4)%Patterncount] );
6967 usc_OutDmaReg( info, TBCR, BitPatterns[(i+5)%Patterncount] );
6969 if ( (usc_InReg( info, TC0R ) != BitPatterns[i]) ||
6970 (usc_InReg( info, TC1R ) != BitPatterns[(i+1)%Patterncount]) ||
6971 (usc_InReg( info, TCLR ) != BitPatterns[(i+2)%Patterncount]) ||
6972 (usc_InReg( info, RCLR ) != BitPatterns[(i+3)%Patterncount]) ||
6973 (usc_InReg( info, RSR ) != BitPatterns[(i+4)%Patterncount]) ||
6974 (usc_InDmaReg( info, TBCR ) != BitPatterns[(i+5)%Patterncount]) ){
6982 spin_unlock_irqrestore(&info->irq_spinlock,flags);
6986 } /* end of mgsl_register_test() */
6988 /* mgsl_irq_test() Perform interrupt test of the 16C32.
6990 * Arguments: info pointer to device instance data
6991 * Return Value: true if test passed, otherwise false
6993 static bool mgsl_irq_test( struct mgsl_struct *info )
6995 unsigned long EndTime;
6996 unsigned long flags;
6998 spin_lock_irqsave(&info->irq_spinlock,flags);
7002 * Setup 16C32 to interrupt on TxC pin (14MHz clock) transition.
7003 * The ISR sets irq_occurred to true.
7006 info->irq_occurred = false;
7008 /* Enable INTEN gate for ISA adapter (Port 6, Bit12) */
7009 /* Enable INTEN (Port 6, Bit12) */
7010 /* This connects the IRQ request signal to the ISA bus */
7011 /* on the ISA adapter. This has no effect for the PCI adapter */
7012 usc_OutReg( info, PCR, (unsigned short)((usc_InReg(info, PCR) | BIT13) & ~BIT12) );
7014 usc_EnableMasterIrqBit(info);
7015 usc_EnableInterrupts(info, IO_PIN);
7016 usc_ClearIrqPendingBits(info, IO_PIN);
7018 usc_UnlatchIostatusBits(info, MISCSTATUS_TXC_LATCHED);
7019 usc_EnableStatusIrqs(info, SICR_TXC_ACTIVE + SICR_TXC_INACTIVE);
7021 spin_unlock_irqrestore(&info->irq_spinlock,flags);
7024 while( EndTime-- && !info->irq_occurred ) {
7025 msleep_interruptible(10);
7028 spin_lock_irqsave(&info->irq_spinlock,flags);
7030 spin_unlock_irqrestore(&info->irq_spinlock,flags);
7032 return info->irq_occurred;
7034 } /* end of mgsl_irq_test() */
7038 * Perform a DMA test of the 16C32. A small frame is
7039 * transmitted via DMA from a transmit buffer to a receive buffer
7040 * using single buffer DMA mode.
7042 * Arguments: info pointer to device instance data
7043 * Return Value: true if test passed, otherwise false
7045 static bool mgsl_dma_test( struct mgsl_struct *info )
7047 unsigned short FifoLevel;
7048 unsigned long phys_addr;
7049 unsigned int FrameSize;
7053 unsigned short status=0;
7054 unsigned long EndTime;
7055 unsigned long flags;
7056 MGSL_PARAMS tmp_params;
7058 /* save current port options */
7059 memcpy(&tmp_params,&info->params,sizeof(MGSL_PARAMS));
7060 /* load default port options */
7061 memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS));
7063 #define TESTFRAMESIZE 40
7065 spin_lock_irqsave(&info->irq_spinlock,flags);
7067 /* setup 16C32 for SDLC DMA transfer mode */
7070 usc_set_sdlc_mode(info);
7071 usc_enable_loopback(info,1);
7073 /* Reprogram the RDMR so that the 16C32 does NOT clear the count
7074 * field of the buffer entry after fetching buffer address. This
7075 * way we can detect a DMA failure for a DMA read (which should be
7076 * non-destructive to system memory) before we try and write to
7077 * memory (where a failure could corrupt system memory).
7080 /* Receive DMA mode Register (RDMR)
7082 * <15..14> 11 DMA mode = Linked List Buffer mode
7083 * <13> 1 RSBinA/L = store Rx status Block in List entry
7084 * <12> 0 1 = Clear count of List Entry after fetching
7085 * <11..10> 00 Address mode = Increment
7086 * <9> 1 Terminate Buffer on RxBound
7087 * <8> 0 Bus Width = 16bits
7088 * <7..0> ? status Bits (write as 0s)
7090 * 1110 0010 0000 0000 = 0xe200
7093 usc_OutDmaReg( info, RDMR, 0xe200 );
7095 spin_unlock_irqrestore(&info->irq_spinlock,flags);
7098 /* SETUP TRANSMIT AND RECEIVE DMA BUFFERS */
7100 FrameSize = TESTFRAMESIZE;
7102 /* setup 1st transmit buffer entry: */
7103 /* with frame size and transmit control word */
7105 info->tx_buffer_list[0].count = FrameSize;
7106 info->tx_buffer_list[0].rcc = FrameSize;
7107 info->tx_buffer_list[0].status = 0x4000;
7109 /* build a transmit frame in 1st transmit DMA buffer */
7111 TmpPtr = info->tx_buffer_list[0].virt_addr;
7112 for (i = 0; i < FrameSize; i++ )
7115 /* setup 1st receive buffer entry: */
7116 /* clear status, set max receive buffer size */
7118 info->rx_buffer_list[0].status = 0;
7119 info->rx_buffer_list[0].count = FrameSize + 4;
7121 /* zero out the 1st receive buffer */
7123 memset( info->rx_buffer_list[0].virt_addr, 0, FrameSize + 4 );
7125 /* Set count field of next buffer entries to prevent */
7126 /* 16C32 from using buffers after the 1st one. */
7128 info->tx_buffer_list[1].count = 0;
7129 info->rx_buffer_list[1].count = 0;
7132 /***************************/
7133 /* Program 16C32 receiver. */
7134 /***************************/
7136 spin_lock_irqsave(&info->irq_spinlock,flags);
7138 /* setup DMA transfers */
7139 usc_RTCmd( info, RTCmd_PurgeRxFifo );
7141 /* program 16C32 receiver with physical address of 1st DMA buffer entry */
7142 phys_addr = info->rx_buffer_list[0].phys_entry;
7143 usc_OutDmaReg( info, NRARL, (unsigned short)phys_addr );
7144 usc_OutDmaReg( info, NRARU, (unsigned short)(phys_addr >> 16) );
7146 /* Clear the Rx DMA status bits (read RDMR) and start channel */
7147 usc_InDmaReg( info, RDMR );
7148 usc_DmaCmd( info, DmaCmd_InitRxChannel );
7150 /* Enable Receiver (RMR <1..0> = 10) */
7151 usc_OutReg( info, RMR, (unsigned short)((usc_InReg(info, RMR) & 0xfffc) | 0x0002) );
7153 spin_unlock_irqrestore(&info->irq_spinlock,flags);
7156 /*************************************************************/
7157 /* WAIT FOR RECEIVER TO DMA ALL PARAMETERS FROM BUFFER ENTRY */
7158 /*************************************************************/
7160 /* Wait 100ms for interrupt. */
7161 EndTime = jiffies + msecs_to_jiffies(100);
7164 if (time_after(jiffies, EndTime)) {
7169 spin_lock_irqsave(&info->irq_spinlock,flags);
7170 status = usc_InDmaReg( info, RDMR );
7171 spin_unlock_irqrestore(&info->irq_spinlock,flags);
7173 if ( !(status & BIT4) && (status & BIT5) ) {
7174 /* INITG (BIT 4) is inactive (no entry read in progress) AND */
7175 /* BUSY (BIT 5) is active (channel still active). */
7176 /* This means the buffer entry read has completed. */
7182 /******************************/
7183 /* Program 16C32 transmitter. */
7184 /******************************/
7186 spin_lock_irqsave(&info->irq_spinlock,flags);
7188 /* Program the Transmit Character Length Register (TCLR) */
7189 /* and clear FIFO (TCC is loaded with TCLR on FIFO clear) */
7191 usc_OutReg( info, TCLR, (unsigned short)info->tx_buffer_list[0].count );
7192 usc_RTCmd( info, RTCmd_PurgeTxFifo );
7194 /* Program the address of the 1st DMA Buffer Entry in linked list */
7196 phys_addr = info->tx_buffer_list[0].phys_entry;
7197 usc_OutDmaReg( info, NTARL, (unsigned short)phys_addr );
7198 usc_OutDmaReg( info, NTARU, (unsigned short)(phys_addr >> 16) );
7200 /* unlatch Tx status bits, and start transmit channel. */
7202 usc_OutReg( info, TCSR, (unsigned short)(( usc_InReg(info, TCSR) & 0x0f00) | 0xfa) );
7203 usc_DmaCmd( info, DmaCmd_InitTxChannel );
7205 /* wait for DMA controller to fill transmit FIFO */
7207 usc_TCmd( info, TCmd_SelectTicrTxFifostatus );
7209 spin_unlock_irqrestore(&info->irq_spinlock,flags);
7212 /**********************************/
7213 /* WAIT FOR TRANSMIT FIFO TO FILL */
7214 /**********************************/
7217 EndTime = jiffies + msecs_to_jiffies(100);
7220 if (time_after(jiffies, EndTime)) {
7225 spin_lock_irqsave(&info->irq_spinlock,flags);
7226 FifoLevel = usc_InReg(info, TICR) >> 8;
7227 spin_unlock_irqrestore(&info->irq_spinlock,flags);
7229 if ( FifoLevel < 16 )
7232 if ( FrameSize < 32 ) {
7233 /* This frame is smaller than the entire transmit FIFO */
7234 /* so wait for the entire frame to be loaded. */
7235 if ( FifoLevel <= (32 - FrameSize) )
7243 /* Enable 16C32 transmitter. */
7245 spin_lock_irqsave(&info->irq_spinlock,flags);
7247 /* Transmit mode Register (TMR), <1..0> = 10, Enable Transmitter */
7248 usc_TCmd( info, TCmd_SendFrame );
7249 usc_OutReg( info, TMR, (unsigned short)((usc_InReg(info, TMR) & 0xfffc) | 0x0002) );
7251 spin_unlock_irqrestore(&info->irq_spinlock,flags);
7254 /******************************/
7255 /* WAIT FOR TRANSMIT COMPLETE */
7256 /******************************/
7259 EndTime = jiffies + msecs_to_jiffies(100);
7261 /* While timer not expired wait for transmit complete */
7263 spin_lock_irqsave(&info->irq_spinlock,flags);
7264 status = usc_InReg( info, TCSR );
7265 spin_unlock_irqrestore(&info->irq_spinlock,flags);
7267 while ( !(status & (BIT6 | BIT5 | BIT4 | BIT2 | BIT1)) ) {
7268 if (time_after(jiffies, EndTime)) {
7273 spin_lock_irqsave(&info->irq_spinlock,flags);
7274 status = usc_InReg( info, TCSR );
7275 spin_unlock_irqrestore(&info->irq_spinlock,flags);
7281 /* CHECK FOR TRANSMIT ERRORS */
7282 if ( status & (BIT5 | BIT1) )
7287 /* WAIT FOR RECEIVE COMPLETE */
7290 EndTime = jiffies + msecs_to_jiffies(100);
7292 /* Wait for 16C32 to write receive status to buffer entry. */
7293 status=info->rx_buffer_list[0].status;
7294 while ( status == 0 ) {
7295 if (time_after(jiffies, EndTime)) {
7299 status=info->rx_buffer_list[0].status;
7305 /* CHECK FOR RECEIVE ERRORS */
7306 status = info->rx_buffer_list[0].status;
7308 if ( status & (BIT8 | BIT3 | BIT1) ) {
7309 /* receive error has occurred */
7312 if ( memcmp( info->tx_buffer_list[0].virt_addr ,
7313 info->rx_buffer_list[0].virt_addr, FrameSize ) ){
7319 spin_lock_irqsave(&info->irq_spinlock,flags);
7321 spin_unlock_irqrestore(&info->irq_spinlock,flags);
7323 /* restore current port options */
7324 memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS));
7328 } /* end of mgsl_dma_test() */
7330 /* mgsl_adapter_test()
7332 * Perform the register, IRQ, and DMA tests for the 16C32.
7334 * Arguments: info pointer to device instance data
7335 * Return Value: 0 if success, otherwise -ENODEV
7337 static int mgsl_adapter_test( struct mgsl_struct *info )
7339 if ( debug_level >= DEBUG_LEVEL_INFO )
7340 printk( "%s(%d):Testing device %s\n",
7341 __FILE__,__LINE__,info->device_name );
7343 if ( !mgsl_register_test( info ) ) {
7344 info->init_error = DiagStatus_AddressFailure;
7345 printk( "%s(%d):Register test failure for device %s Addr=%04X\n",
7346 __FILE__,__LINE__,info->device_name, (unsigned short)(info->io_base) );
7350 if ( !mgsl_irq_test( info ) ) {
7351 info->init_error = DiagStatus_IrqFailure;
7352 printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n",
7353 __FILE__,__LINE__,info->device_name, (unsigned short)(info->irq_level) );
7357 if ( !mgsl_dma_test( info ) ) {
7358 info->init_error = DiagStatus_DmaFailure;
7359 printk( "%s(%d):DMA test failure for device %s DMA=%d\n",
7360 __FILE__,__LINE__,info->device_name, (unsigned short)(info->dma_level) );
7364 if ( debug_level >= DEBUG_LEVEL_INFO )
7365 printk( "%s(%d):device %s passed diagnostics\n",
7366 __FILE__,__LINE__,info->device_name );
7370 } /* end of mgsl_adapter_test() */
7372 /* mgsl_memory_test()
7374 * Test the shared memory on a PCI adapter.
7376 * Arguments: info pointer to device instance data
7377 * Return Value: true if test passed, otherwise false
7379 static bool mgsl_memory_test( struct mgsl_struct *info )
7381 static unsigned long BitPatterns[] =
7382 { 0x0, 0x55555555, 0xaaaaaaaa, 0x66666666, 0x99999999, 0xffffffff, 0x12345678 };
7383 unsigned long Patterncount = ARRAY_SIZE(BitPatterns);
7385 unsigned long TestLimit = SHARED_MEM_ADDRESS_SIZE/sizeof(unsigned long);
7386 unsigned long * TestAddr;
7388 if ( info->bus_type != MGSL_BUS_TYPE_PCI )
7391 TestAddr = (unsigned long *)info->memory_base;
7393 /* Test data lines with test pattern at one location. */
7395 for ( i = 0 ; i < Patterncount ; i++ ) {
7396 *TestAddr = BitPatterns[i];
7397 if ( *TestAddr != BitPatterns[i] )
7401 /* Test address lines with incrementing pattern over */
7402 /* entire address range. */
7404 for ( i = 0 ; i < TestLimit ; i++ ) {
7409 TestAddr = (unsigned long *)info->memory_base;
7411 for ( i = 0 ; i < TestLimit ; i++ ) {
7412 if ( *TestAddr != i * 4 )
7417 memset( info->memory_base, 0, SHARED_MEM_ADDRESS_SIZE );
7421 } /* End Of mgsl_memory_test() */
7424 /* mgsl_load_pci_memory()
7426 * Load a large block of data into the PCI shared memory.
7427 * Use this instead of memcpy() or memmove() to move data
7428 * into the PCI shared memory.
7432 * This function prevents the PCI9050 interface chip from hogging
7433 * the adapter local bus, which can starve the 16C32 by preventing
7434 * 16C32 bus master cycles.
7436 * The PCI9050 documentation says that the 9050 will always release
7437 * control of the local bus after completing the current read
7438 * or write operation.
7440 * It appears that as long as the PCI9050 write FIFO is full, the
7441 * PCI9050 treats all of the writes as a single burst transaction
7442 * and will not release the bus. This causes DMA latency problems
7443 * at high speeds when copying large data blocks to the shared
7446 * This function in effect, breaks the a large shared memory write
7447 * into multiple transations by interleaving a shared memory read
7448 * which will flush the write FIFO and 'complete' the write
7449 * transation. This allows any pending DMA request to gain control
7450 * of the local bus in a timely fasion.
7454 * TargetPtr pointer to target address in PCI shared memory
7455 * SourcePtr pointer to source buffer for data
7456 * count count in bytes of data to copy
7458 * Return Value: None
7460 static void mgsl_load_pci_memory( char* TargetPtr, const char* SourcePtr,
7461 unsigned short count )
7463 /* 16 32-bit writes @ 60ns each = 960ns max latency on local bus */
7464 #define PCI_LOAD_INTERVAL 64
7466 unsigned short Intervalcount = count / PCI_LOAD_INTERVAL;
7467 unsigned short Index;
7468 unsigned long Dummy;
7470 for ( Index = 0 ; Index < Intervalcount ; Index++ )
7472 memcpy(TargetPtr, SourcePtr, PCI_LOAD_INTERVAL);
7473 Dummy = *((volatile unsigned long *)TargetPtr);
7474 TargetPtr += PCI_LOAD_INTERVAL;
7475 SourcePtr += PCI_LOAD_INTERVAL;
7478 memcpy( TargetPtr, SourcePtr, count % PCI_LOAD_INTERVAL );
7480 } /* End Of mgsl_load_pci_memory() */
7482 static void mgsl_trace_block(struct mgsl_struct *info,const char* data, int count, int xmit)
7487 printk("%s tx data:\n",info->device_name);
7489 printk("%s rx data:\n",info->device_name);
7497 for(i=0;i<linecount;i++)
7498 printk("%02X ",(unsigned char)data[i]);
7501 for(i=0;i<linecount;i++) {
7502 if (data[i]>=040 && data[i]<=0176)
7503 printk("%c",data[i]);
7512 } /* end of mgsl_trace_block() */
7514 /* mgsl_tx_timeout()
7516 * called when HDLC frame times out
7517 * update stats and do tx completion processing
7519 * Arguments: context pointer to device instance data
7520 * Return Value: None
7522 static void mgsl_tx_timeout(unsigned long context)
7524 struct mgsl_struct *info = (struct mgsl_struct*)context;
7525 unsigned long flags;
7527 if ( debug_level >= DEBUG_LEVEL_INFO )
7528 printk( "%s(%d):mgsl_tx_timeout(%s)\n",
7529 __FILE__,__LINE__,info->device_name);
7530 if(info->tx_active &&
7531 (info->params.mode == MGSL_MODE_HDLC ||
7532 info->params.mode == MGSL_MODE_RAW) ) {
7533 info->icount.txtimeout++;
7535 spin_lock_irqsave(&info->irq_spinlock,flags);
7536 info->tx_active = false;
7537 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
7539 if ( info->params.flags & HDLC_FLAG_HDLC_LOOPMODE )
7540 usc_loopmode_cancel_transmit( info );
7542 spin_unlock_irqrestore(&info->irq_spinlock,flags);
7544 #if SYNCLINK_GENERIC_HDLC
7546 hdlcdev_tx_done(info);
7549 mgsl_bh_transmit(info);
7551 } /* end of mgsl_tx_timeout() */
7553 /* signal that there are no more frames to send, so that
7554 * line is 'released' by echoing RxD to TxD when current
7555 * transmission is complete (or immediately if no tx in progress).
7557 static int mgsl_loopmode_send_done( struct mgsl_struct * info )
7559 unsigned long flags;
7561 spin_lock_irqsave(&info->irq_spinlock,flags);
7562 if (info->params.flags & HDLC_FLAG_HDLC_LOOPMODE) {
7563 if (info->tx_active)
7564 info->loopmode_send_done_requested = true;
7566 usc_loopmode_send_done(info);
7568 spin_unlock_irqrestore(&info->irq_spinlock,flags);
7573 /* release the line by echoing RxD to TxD
7574 * upon completion of a transmit frame
7576 static void usc_loopmode_send_done( struct mgsl_struct * info )
7578 info->loopmode_send_done_requested = false;
7579 /* clear CMR:13 to 0 to start echoing RxData to TxData */
7580 info->cmr_value &= ~BIT13;
7581 usc_OutReg(info, CMR, info->cmr_value);
7584 /* abort a transmit in progress while in HDLC LoopMode
7586 static void usc_loopmode_cancel_transmit( struct mgsl_struct * info )
7588 /* reset tx dma channel and purge TxFifo */
7589 usc_RTCmd( info, RTCmd_PurgeTxFifo );
7590 usc_DmaCmd( info, DmaCmd_ResetTxChannel );
7591 usc_loopmode_send_done( info );
7594 /* for HDLC/SDLC LoopMode, setting CMR:13 after the transmitter is enabled
7595 * is an Insert Into Loop action. Upon receipt of a GoAhead sequence (RxAbort)
7596 * we must clear CMR:13 to begin repeating TxData to RxData
7598 static void usc_loopmode_insert_request( struct mgsl_struct * info )
7600 info->loopmode_insert_requested = true;
7602 /* enable RxAbort irq. On next RxAbort, clear CMR:13 to
7603 * begin repeating TxData on RxData (complete insertion)
7605 usc_OutReg( info, RICR,
7606 (usc_InReg( info, RICR ) | RXSTATUS_ABORT_RECEIVED ) );
7608 /* set CMR:13 to insert into loop on next GoAhead (RxAbort) */
7609 info->cmr_value |= BIT13;
7610 usc_OutReg(info, CMR, info->cmr_value);
7613 /* return 1 if station is inserted into the loop, otherwise 0
7615 static int usc_loopmode_active( struct mgsl_struct * info)
7617 return usc_InReg( info, CCSR ) & BIT7 ? 1 : 0 ;
7620 #if SYNCLINK_GENERIC_HDLC
7623 * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.)
7624 * set encoding and frame check sequence (FCS) options
7626 * dev pointer to network device structure
7627 * encoding serial encoding setting
7628 * parity FCS setting
7630 * returns 0 if success, otherwise error code
7632 static int hdlcdev_attach(struct net_device *dev, unsigned short encoding,
7633 unsigned short parity)
7635 struct mgsl_struct *info = dev_to_port(dev);
7636 unsigned char new_encoding;
7637 unsigned short new_crctype;
7639 /* return error if TTY interface open */
7640 if (info->port.count)
7645 case ENCODING_NRZ: new_encoding = HDLC_ENCODING_NRZ; break;
7646 case ENCODING_NRZI: new_encoding = HDLC_ENCODING_NRZI_SPACE; break;
7647 case ENCODING_FM_MARK: new_encoding = HDLC_ENCODING_BIPHASE_MARK; break;
7648 case ENCODING_FM_SPACE: new_encoding = HDLC_ENCODING_BIPHASE_SPACE; break;
7649 case ENCODING_MANCHESTER: new_encoding = HDLC_ENCODING_BIPHASE_LEVEL; break;
7650 default: return -EINVAL;
7655 case PARITY_NONE: new_crctype = HDLC_CRC_NONE; break;
7656 case PARITY_CRC16_PR1_CCITT: new_crctype = HDLC_CRC_16_CCITT; break;
7657 case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break;
7658 default: return -EINVAL;
7661 info->params.encoding = new_encoding;
7662 info->params.crc_type = new_crctype;
7664 /* if network interface up, reprogram hardware */
7666 mgsl_program_hw(info);
7672 * called by generic HDLC layer to send frame
7674 * skb socket buffer containing HDLC frame
7675 * dev pointer to network device structure
7677 static netdev_tx_t hdlcdev_xmit(struct sk_buff *skb,
7678 struct net_device *dev)
7680 struct mgsl_struct *info = dev_to_port(dev);
7681 unsigned long flags;
7683 if (debug_level >= DEBUG_LEVEL_INFO)
7684 printk(KERN_INFO "%s:hdlc_xmit(%s)\n",__FILE__,dev->name);
7686 /* stop sending until this frame completes */
7687 netif_stop_queue(dev);
7689 /* copy data to device buffers */
7690 info->xmit_cnt = skb->len;
7691 mgsl_load_tx_dma_buffer(info, skb->data, skb->len);
7693 /* update network statistics */
7694 dev->stats.tx_packets++;
7695 dev->stats.tx_bytes += skb->len;
7697 /* done with socket buffer, so free it */
7700 /* save start time for transmit timeout detection */
7701 netif_trans_update(dev);
7703 /* start hardware transmitter if necessary */
7704 spin_lock_irqsave(&info->irq_spinlock,flags);
7705 if (!info->tx_active)
7706 usc_start_transmitter(info);
7707 spin_unlock_irqrestore(&info->irq_spinlock,flags);
7709 return NETDEV_TX_OK;
7713 * called by network layer when interface enabled
7714 * claim resources and initialize hardware
7716 * dev pointer to network device structure
7718 * returns 0 if success, otherwise error code
7720 static int hdlcdev_open(struct net_device *dev)
7722 struct mgsl_struct *info = dev_to_port(dev);
7724 unsigned long flags;
7726 if (debug_level >= DEBUG_LEVEL_INFO)
7727 printk("%s:hdlcdev_open(%s)\n",__FILE__,dev->name);
7729 /* generic HDLC layer open processing */
7730 rc = hdlc_open(dev);
7734 /* arbitrate between network and tty opens */
7735 spin_lock_irqsave(&info->netlock, flags);
7736 if (info->port.count != 0 || info->netcount != 0) {
7737 printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name);
7738 spin_unlock_irqrestore(&info->netlock, flags);
7742 spin_unlock_irqrestore(&info->netlock, flags);
7744 /* claim resources and init adapter */
7745 if ((rc = startup(info)) != 0) {
7746 spin_lock_irqsave(&info->netlock, flags);
7748 spin_unlock_irqrestore(&info->netlock, flags);
7752 /* assert RTS and DTR, apply hardware settings */
7753 info->serial_signals |= SerialSignal_RTS | SerialSignal_DTR;
7754 mgsl_program_hw(info);
7756 /* enable network layer transmit */
7757 netif_trans_update(dev);
7758 netif_start_queue(dev);
7760 /* inform generic HDLC layer of current DCD status */
7761 spin_lock_irqsave(&info->irq_spinlock, flags);
7762 usc_get_serial_signals(info);
7763 spin_unlock_irqrestore(&info->irq_spinlock, flags);
7764 if (info->serial_signals & SerialSignal_DCD)
7765 netif_carrier_on(dev);
7767 netif_carrier_off(dev);
7772 * called by network layer when interface is disabled
7773 * shutdown hardware and release resources
7775 * dev pointer to network device structure
7777 * returns 0 if success, otherwise error code
7779 static int hdlcdev_close(struct net_device *dev)
7781 struct mgsl_struct *info = dev_to_port(dev);
7782 unsigned long flags;
7784 if (debug_level >= DEBUG_LEVEL_INFO)
7785 printk("%s:hdlcdev_close(%s)\n",__FILE__,dev->name);
7787 netif_stop_queue(dev);
7789 /* shutdown adapter and release resources */
7794 spin_lock_irqsave(&info->netlock, flags);
7796 spin_unlock_irqrestore(&info->netlock, flags);
7802 * called by network layer to process IOCTL call to network device
7804 * dev pointer to network device structure
7805 * ifr pointer to network interface request structure
7806 * cmd IOCTL command code
7808 * returns 0 if success, otherwise error code
7810 static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
7812 const size_t size = sizeof(sync_serial_settings);
7813 sync_serial_settings new_line;
7814 sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync;
7815 struct mgsl_struct *info = dev_to_port(dev);
7818 if (debug_level >= DEBUG_LEVEL_INFO)
7819 printk("%s:hdlcdev_ioctl(%s)\n",__FILE__,dev->name);
7821 /* return error if TTY interface open */
7822 if (info->port.count)
7825 if (cmd != SIOCWANDEV)
7826 return hdlc_ioctl(dev, ifr, cmd);
7828 switch(ifr->ifr_settings.type) {
7829 case IF_GET_IFACE: /* return current sync_serial_settings */
7831 ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL;
7832 if (ifr->ifr_settings.size < size) {
7833 ifr->ifr_settings.size = size; /* data size wanted */
7837 flags = info->params.flags & (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
7838 HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
7839 HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
7840 HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
7842 memset(&new_line, 0, sizeof(new_line));
7844 case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break;
7845 case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break;
7846 case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_TXINT; break;
7847 case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN): new_line.clock_type = CLOCK_TXFROMRX; break;
7848 default: new_line.clock_type = CLOCK_DEFAULT;
7851 new_line.clock_rate = info->params.clock_speed;
7852 new_line.loopback = info->params.loopback ? 1:0;
7854 if (copy_to_user(line, &new_line, size))
7858 case IF_IFACE_SYNC_SERIAL: /* set sync_serial_settings */
7860 if(!capable(CAP_NET_ADMIN))
7862 if (copy_from_user(&new_line, line, size))
7865 switch (new_line.clock_type)
7867 case CLOCK_EXT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN; break;
7868 case CLOCK_TXFROMRX: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN; break;
7869 case CLOCK_INT: flags = HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG; break;
7870 case CLOCK_TXINT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG; break;
7871 case CLOCK_DEFAULT: flags = info->params.flags &
7872 (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
7873 HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
7874 HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
7875 HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); break;
7876 default: return -EINVAL;
7879 if (new_line.loopback != 0 && new_line.loopback != 1)
7882 info->params.flags &= ~(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
7883 HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
7884 HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
7885 HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
7886 info->params.flags |= flags;
7888 info->params.loopback = new_line.loopback;
7890 if (flags & (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG))
7891 info->params.clock_speed = new_line.clock_rate;
7893 info->params.clock_speed = 0;
7895 /* if network interface up, reprogram hardware */
7897 mgsl_program_hw(info);
7901 return hdlc_ioctl(dev, ifr, cmd);
7906 * called by network layer when transmit timeout is detected
7908 * dev pointer to network device structure
7910 static void hdlcdev_tx_timeout(struct net_device *dev)
7912 struct mgsl_struct *info = dev_to_port(dev);
7913 unsigned long flags;
7915 if (debug_level >= DEBUG_LEVEL_INFO)
7916 printk("hdlcdev_tx_timeout(%s)\n",dev->name);
7918 dev->stats.tx_errors++;
7919 dev->stats.tx_aborted_errors++;
7921 spin_lock_irqsave(&info->irq_spinlock,flags);
7922 usc_stop_transmitter(info);
7923 spin_unlock_irqrestore(&info->irq_spinlock,flags);
7925 netif_wake_queue(dev);
7929 * called by device driver when transmit completes
7930 * reenable network layer transmit if stopped
7932 * info pointer to device instance information
7934 static void hdlcdev_tx_done(struct mgsl_struct *info)
7936 if (netif_queue_stopped(info->netdev))
7937 netif_wake_queue(info->netdev);
7941 * called by device driver when frame received
7942 * pass frame to network layer
7944 * info pointer to device instance information
7945 * buf pointer to buffer contianing frame data
7946 * size count of data bytes in buf
7948 static void hdlcdev_rx(struct mgsl_struct *info, char *buf, int size)
7950 struct sk_buff *skb = dev_alloc_skb(size);
7951 struct net_device *dev = info->netdev;
7953 if (debug_level >= DEBUG_LEVEL_INFO)
7954 printk("hdlcdev_rx(%s)\n", dev->name);
7957 printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n",
7959 dev->stats.rx_dropped++;
7963 skb_put_data(skb, buf, size);
7965 skb->protocol = hdlc_type_trans(skb, dev);
7967 dev->stats.rx_packets++;
7968 dev->stats.rx_bytes += size;
7973 static const struct net_device_ops hdlcdev_ops = {
7974 .ndo_open = hdlcdev_open,
7975 .ndo_stop = hdlcdev_close,
7976 .ndo_start_xmit = hdlc_start_xmit,
7977 .ndo_do_ioctl = hdlcdev_ioctl,
7978 .ndo_tx_timeout = hdlcdev_tx_timeout,
7982 * called by device driver when adding device instance
7983 * do generic HDLC initialization
7985 * info pointer to device instance information
7987 * returns 0 if success, otherwise error code
7989 static int hdlcdev_init(struct mgsl_struct *info)
7992 struct net_device *dev;
7995 /* allocate and initialize network and HDLC layer objects */
7997 dev = alloc_hdlcdev(info);
7999 printk(KERN_ERR "%s:hdlc device allocation failure\n",__FILE__);
8003 /* for network layer reporting purposes only */
8004 dev->base_addr = info->io_base;
8005 dev->irq = info->irq_level;
8006 dev->dma = info->dma_level;
8008 /* network layer callbacks and settings */
8009 dev->netdev_ops = &hdlcdev_ops;
8010 dev->watchdog_timeo = 10 * HZ;
8011 dev->tx_queue_len = 50;
8013 /* generic HDLC layer callbacks and settings */
8014 hdlc = dev_to_hdlc(dev);
8015 hdlc->attach = hdlcdev_attach;
8016 hdlc->xmit = hdlcdev_xmit;
8018 /* register objects with HDLC layer */
8019 rc = register_hdlc_device(dev);
8021 printk(KERN_WARNING "%s:unable to register hdlc device\n",__FILE__);
8031 * called by device driver when removing device instance
8032 * do generic HDLC cleanup
8034 * info pointer to device instance information
8036 static void hdlcdev_exit(struct mgsl_struct *info)
8038 unregister_hdlc_device(info->netdev);
8039 free_netdev(info->netdev);
8040 info->netdev = NULL;
8043 #endif /* CONFIG_HDLC */
8046 static int synclink_init_one (struct pci_dev *dev,
8047 const struct pci_device_id *ent)
8049 struct mgsl_struct *info;
8051 if (pci_enable_device(dev)) {
8052 printk("error enabling pci device %p\n", dev);
8056 info = mgsl_allocate_device();
8058 printk("can't allocate device instance data.\n");
8062 /* Copy user configuration info to device instance data */
8064 info->io_base = pci_resource_start(dev, 2);
8065 info->irq_level = dev->irq;
8066 info->phys_memory_base = pci_resource_start(dev, 3);
8068 /* Because veremap only works on page boundaries we must map
8069 * a larger area than is actually implemented for the LCR
8070 * memory range. We map a full page starting at the page boundary.
8072 info->phys_lcr_base = pci_resource_start(dev, 0);
8073 info->lcr_offset = info->phys_lcr_base & (PAGE_SIZE-1);
8074 info->phys_lcr_base &= ~(PAGE_SIZE-1);
8076 info->bus_type = MGSL_BUS_TYPE_PCI;
8077 info->io_addr_size = 8;
8078 info->irq_flags = IRQF_SHARED;
8080 if (dev->device == 0x0210) {
8081 /* Version 1 PCI9030 based universal PCI adapter */
8082 info->misc_ctrl_value = 0x007c4080;
8083 info->hw_version = 1;
8085 /* Version 0 PCI9050 based 5V PCI adapter
8086 * A PCI9050 bug prevents reading LCR registers if
8087 * LCR base address bit 7 is set. Maintain shadow
8088 * value so we can write to LCR misc control reg.
8090 info->misc_ctrl_value = 0x087e4546;
8091 info->hw_version = 0;
8094 mgsl_add_device(info);
8099 static void synclink_remove_one (struct pci_dev *dev)