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tty: riscom8 kref and tty_port_close
[linux-2.6-block.git] / drivers / char / cyclades.c
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1da177e4
LT		 1#undef BLOCKMOVE
2#define Z_WAKE
3#undef Z_EXT_CHARS_IN_BUFFER
1da177e4
LT		 4
5/*
6 * linux/drivers/char/cyclades.c
7 *
8 * This file contains the driver for the Cyclades async multiport
9 * serial boards.
10 *
11 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
12 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
1da177e4 13 *
ebdb5135 14 * Copyright (C) 2007-2009 Jiri Slaby <jirislaby@gmail.com>
1da177e4
LT		 15 *
16 * Much of the design and some of the code came from serial.c
17 * which was copyright (C) 1991, 1992 Linus Torvalds. It was
18 * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
19 * and then fixed as suggested by Michael K. Johnson 12/12/92.
c8e1693a 20 * Converted to pci probing and cleaned up by Jiri Slaby.
1da177e4 21 *
1da177e4
LT		 22 */
23
ebdb5135 24#define CY_VERSION "2.6"
096dcfce 25
1da177e4
LT		 26/* If you need to install more boards than NR_CARDS, change the constant
27 in the definition below. No other change is necessary to support up to
28 eight boards. Beyond that you'll have to extend cy_isa_addresses. */
29
02f1175c 30#define NR_CARDS 4
1da177e4
LT		 31
32/*
33 If the total number of ports is larger than NR_PORTS, change this
34 constant in the definition below. No other change is necessary to
35 support more boards/ports. */
36
02f1175c 37#define NR_PORTS 256
1da177e4 38
1da177e4
LT		 39#define ZO_V1 0
40#define ZO_V2 1
41#define ZE_V1 2
42
43#define SERIAL_PARANOIA_CHECK
44#undef CY_DEBUG_OPEN
45#undef CY_DEBUG_THROTTLE
46#undef CY_DEBUG_OTHER
47#undef CY_DEBUG_IO
48#undef CY_DEBUG_COUNT
49#undef CY_DEBUG_DTR
50#undef CY_DEBUG_WAIT_UNTIL_SENT
51#undef CY_DEBUG_INTERRUPTS
52#undef CY_16Y_HACK
53#undef CY_ENABLE_MONITORING
54#undef CY_PCI_DEBUG
55
1da177e4 56/*
15ed6cc0 57 * Include section
1da177e4 58 */
1da177e4
LT		 59#include <linux/module.h>
60#include <linux/errno.h>
61#include <linux/signal.h>
62#include <linux/sched.h>
63#include <linux/timer.h>
64#include <linux/interrupt.h>
65#include <linux/tty.h>
33f0f88f 66#include <linux/tty_flip.h>
1da177e4 67#include <linux/serial.h>
405f5571 68#include <linux/smp_lock.h>
1da177e4
LT		 69#include <linux/major.h>
70#include <linux/string.h>
71#include <linux/fcntl.h>
72#include <linux/ptrace.h>
73#include <linux/cyclades.h>
74#include <linux/mm.h>
75#include <linux/ioport.h>
76#include <linux/init.h>
77#include <linux/delay.h>
78#include <linux/spinlock.h>
79#include <linux/bitops.h>
054f5b0a 80#include <linux/firmware.h>
9f56fad7 81#include <linux/device.h>
1da177e4 82
15ed6cc0 83#include <linux/io.h>
15ed6cc0 84#include <linux/uaccess.h>
1da177e4 85
1da177e4
LT		 86#include <linux/kernel.h>
87#include <linux/pci.h>
88
89#include <linux/stat.h>
90#include <linux/proc_fs.h>
444697d6 91#include <linux/seq_file.h>
1da177e4 92
02f1175c 93static void cy_send_xchar(struct tty_struct *tty, char ch);
1da177e4 94
1da177e4
LT		 95#ifndef SERIAL_XMIT_SIZE
96#define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
97#endif
1da177e4
LT		 98
99#define STD_COM_FLAGS (0)
100
054f5b0a
JS		 101/* firmware stuff */
102#define ZL_MAX_BLOCKS 16
103#define DRIVER_VERSION 0x02010203
104#define RAM_SIZE 0x80000
105
054f5b0a
JS		 106enum zblock_type {
107 ZBLOCK_PRG = 0,
108 ZBLOCK_FPGA = 1
109};
110
111struct zfile_header {
112 char name[64];
113 char date[32];
114 char aux[32];
115 u32 n_config;
116 u32 config_offset;
117 u32 n_blocks;
118 u32 block_offset;
119 u32 reserved[9];
120} __attribute__ ((packed));
121
122struct zfile_config {
123 char name[64];
124 u32 mailbox;
125 u32 function;
126 u32 n_blocks;
127 u32 block_list[ZL_MAX_BLOCKS];
128} __attribute__ ((packed));
129
130struct zfile_block {
131 u32 type;
132 u32 file_offset;
133 u32 ram_offset;
134 u32 size;
135} __attribute__ ((packed));
136
1da177e4
LT		 137static struct tty_driver *cy_serial_driver;
138
139#ifdef CONFIG_ISA
140/* This is the address lookup table. The driver will probe for
141 Cyclom-Y/ISA boards at all addresses in here. If you want the
142 driver to probe addresses at a different address, add it to
143 this table. If the driver is probing some other board and
144 causing problems, remove the offending address from this table.
1da177e4
LT		 145*/
146
147static unsigned int cy_isa_addresses[] = {
02f1175c
JS		 148 0xD0000,
149 0xD2000,
150 0xD4000,
151 0xD6000,
152 0xD8000,
153 0xDA000,
154 0xDC000,
155 0xDE000,
156 0, 0, 0, 0, 0, 0, 0, 0
1da177e4 157};
02f1175c 158
fe971071 159#define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
1da177e4
LT		 160
161#ifdef MODULE
3046d50e
JS		 162static long maddr[NR_CARDS];
163static int irq[NR_CARDS];
1da177e4
LT		 164
165module_param_array(maddr, long, NULL, 0);
166module_param_array(irq, int, NULL, 0);
167#endif
168
02f1175c 169#endif /* CONFIG_ISA */
1da177e4
LT		 170
171/* This is the per-card data structure containing address, irq, number of
172 channels, etc. This driver supports a maximum of NR_CARDS cards.
173*/
174static struct cyclades_card cy_card[NR_CARDS];
175
02f1175c 176static int cy_next_channel; /* next minor available */
1da177e4 177
1da177e4
LT		 178/*
179 * This is used to look up the divisor speeds and the timeouts
180 * We're normally limited to 15 distinct baud rates. The extra
77451e53 181 * are accessed via settings in info->port.flags.
1da177e4
LT		 182 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
183 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
184 * HI VHI
185 * 20
186 */
ebdb5135 187static const int baud_table[] = {
02f1175c
JS		 188 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
189 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
190 230400, 0
191};
192
ebdb5135 193static const char baud_co_25[] = { /* 25 MHz clock option table */
02f1175c
JS		 194 /* value => 00 01 02 03 04 */
195 /* divide by 8 32 128 512 2048 */
196 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
197 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
198};
199
ebdb5135 200static const char baud_bpr_25[] = { /* 25 MHz baud rate period table */
02f1175c
JS		 201 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
202 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
203};
204
ebdb5135 205static const char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
02f1175c
JS		 206 /* value => 00 01 02 03 04 */
207 /* divide by 8 32 128 512 2048 */
208 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
209 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
210 0x00
211};
212
ebdb5135 213static const char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
02f1175c
JS		 214 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
215 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
216 0x21
217};
218
ebdb5135 219static const char baud_cor3[] = { /* receive threshold */
02f1175c
JS		 220 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
221 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
222 0x07
223};
1da177e4
LT		 224
225/*
226 * The Cyclades driver implements HW flow control as any serial driver.
15ed6cc0
AC		 227 * The cyclades_port structure member rflow and the vector rflow_thr
228 * allows us to take advantage of a special feature in the CD1400 to avoid
229 * data loss even when the system interrupt latency is too high. These flags
230 * are to be used only with very special applications. Setting these flags
231 * requires the use of a special cable (DTR and RTS reversed). In the new
232 * CD1400-based boards (rev. 6.00 or later), there is no need for special
1da177e4
LT		 233 * cables.
234 */
235
ebdb5135 236static const char rflow_thr[] = { /* rflow threshold */
02f1175c
JS		 237 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
238 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
239 0x0a
240};
1da177e4
LT		 241
242/* The Cyclom-Ye has placed the sequential chips in non-sequential
243 * address order. This look-up table overcomes that problem.
244 */
f0eefdc3 245static const unsigned int cy_chip_offset[] = { 0x0000,
02f1175c
JS		 246 0x0400,
247 0x0800,
248 0x0C00,
249 0x0200,
250 0x0600,
251 0x0A00,
252 0x0E00
253};
1da177e4
LT		 254
255/* PCI related definitions */
256
1da177e4 257#ifdef CONFIG_PCI
ebdb5135 258static const struct pci_device_id cy_pci_dev_id[] = {
15ed6cc0
AC		 259 /* PCI < 1Mb */
260 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) },
261 /* PCI > 1Mb */
262 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) },
263 /* 4Y PCI < 1Mb */
264 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) },
265 /* 4Y PCI > 1Mb */
266 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) },
267 /* 8Y PCI < 1Mb */
268 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) },
269 /* 8Y PCI > 1Mb */
270 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) },
271 /* Z PCI < 1Mb */
272 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) },
273 /* Z PCI > 1Mb */
274 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) },
893de2df 275 { } /* end of table */
02f1175c 276};
893de2df 277MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
1da177e4
LT		 278#endif
279
280static void cy_start(struct tty_struct *);
d13549f8 281static void cy_set_line_char(struct cyclades_port *, struct tty_struct *);
1a86b5e3 282static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
1da177e4
LT		 283#ifdef CONFIG_ISA
284static unsigned detect_isa_irq(void __iomem *);
02f1175c 285#endif /* CONFIG_ISA */
1da177e4 286
1da177e4
LT		 287#ifndef CONFIG_CYZ_INTR
288static void cyz_poll(unsigned long);
289
290/* The Cyclades-Z polling cycle is defined by this variable */
291static long cyz_polling_cycle = CZ_DEF_POLL;
292
8d06afab 293static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
1da177e4 294
02f1175c 295#else /* CONFIG_CYZ_INTR */
1da177e4
LT		 296static void cyz_rx_restart(unsigned long);
297static struct timer_list cyz_rx_full_timer[NR_PORTS];
02f1175c 298#endif /* CONFIG_CYZ_INTR */
1da177e4 299
3aeea5b9
JS		 300static inline void cyy_writeb(struct cyclades_port *port, u32 reg, u8 val)
301{
302 struct cyclades_card *card = port->card;
303
304 cy_writeb(port->u.cyy.base_addr + (reg << card->bus_index), val);
305}
306
307static inline u8 cyy_readb(struct cyclades_port *port, u32 reg)
308{
309 struct cyclades_card *card = port->card;
310
311 return readb(port->u.cyy.base_addr + (reg << card->bus_index));
312}
313
2693f485
JS		 314static inline bool cy_is_Z(struct cyclades_card *card)
315{
316 return card->num_chips == (unsigned int)-1;
317}
318
319static inline bool __cyz_fpga_loaded(struct RUNTIME_9060 __iomem *ctl_addr)
320{
321 return readl(&ctl_addr->init_ctrl) & (1 << 17);
322}
323
324static inline bool cyz_fpga_loaded(struct cyclades_card *card)
325{
326 return __cyz_fpga_loaded(card->ctl_addr.p9060);
327}
328
329static inline bool cyz_is_loaded(struct cyclades_card *card)
330{
331 struct FIRM_ID __iomem *fw_id = card->base_addr + ID_ADDRESS;
332
333 return (card->hw_ver == ZO_V1 || cyz_fpga_loaded(card)) &&
334 readl(&fw_id->signature) == ZFIRM_ID;
335}
336
02f1175c 337static inline int serial_paranoia_check(struct cyclades_port *info,
ebdb5135 338 const char *name, const char *routine)
1da177e4
LT		 339{
340#ifdef SERIAL_PARANOIA_CHECK
02f1175c 341 if (!info) {
21719191
JS		 342 printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
343 "in %s\n", name, routine);
02f1175c
JS		 344 return 1;
345 }
346
02f1175c 347 if (info->magic != CYCLADES_MAGIC) {
21719191
JS		 348 printk(KERN_WARNING "cyc Warning: bad magic number for serial "
349 "struct (%s) in %s\n", name, routine);
02f1175c
JS		 350 return 1;
351 }
1da177e4 352#endif
02f1175c 353 return 0;
ebdb5135 354}
1da177e4 355
1da177e4
LT		 356/***********************************************************/
357/********* Start of block of Cyclom-Y specific code ********/
358
359/* This routine waits up to 1000 micro-seconds for the previous
360 command to the Cirrus chip to complete and then issues the
361 new command. An error is returned if the previous command
362 didn't finish within the time limit.
363
364 This function is only called from inside spinlock-protected code.
365 */
3aeea5b9 366static int __cyy_issue_cmd(void __iomem *base_addr, u8 cmd, int index)
1da177e4 367{
3aeea5b9 368 void __iomem *ccr = base_addr + (CyCCR << index);
ad39c300 369 unsigned int i;
1da177e4 370
02f1175c
JS		 371 /* Check to see that the previous command has completed */
372 for (i = 0; i < 100; i++) {
3aeea5b9 373 if (readb(ccr) == 0)
02f1175c 374 break;
02f1175c 375 udelay(10L);
1da177e4 376 }
02f1175c
JS		 377 /* if the CCR never cleared, the previous command
378 didn't finish within the "reasonable time" */
379 if (i == 100)
096dcfce 380 return -1;
1da177e4 381
02f1175c 382 /* Issue the new command */
3aeea5b9 383 cy_writeb(ccr, cmd);
1da177e4 384
096dcfce 385 return 0;
3aeea5b9
JS		 386}
387
388static inline int cyy_issue_cmd(struct cyclades_port *port, u8 cmd)
389{
390 return __cyy_issue_cmd(port->u.cyy.base_addr, cmd,
391 port->card->bus_index);
392}
1da177e4
LT		 393
394#ifdef CONFIG_ISA
395/* ISA interrupt detection code */
15ed6cc0 396static unsigned detect_isa_irq(void __iomem *address)
1da177e4 397{
02f1175c
JS		 398 int irq;
399 unsigned long irqs, flags;
400 int save_xir, save_car;
401 int index = 0; /* IRQ probing is only for ISA */
402
403 /* forget possible initially masked and pending IRQ */
404 irq = probe_irq_off(probe_irq_on());
405
406 /* Clear interrupts on the board first */
407 cy_writeb(address + (Cy_ClrIntr << index), 0);
408 /* Cy_ClrIntr is 0x1800 */
409
410 irqs = probe_irq_on();
411 /* Wait ... */
f6e208c1 412 msleep(5);
02f1175c
JS		 413
414 /* Enable the Tx interrupts on the CD1400 */
415 local_irq_save(flags);
416 cy_writeb(address + (CyCAR << index), 0);
3aeea5b9 417 __cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
02f1175c
JS		 418
419 cy_writeb(address + (CyCAR << index), 0);
420 cy_writeb(address + (CySRER << index),
db05c3b1 421 readb(address + (CySRER << index)) | CyTxRdy);
02f1175c
JS		 422 local_irq_restore(flags);
423
424 /* Wait ... */
f6e208c1 425 msleep(5);
02f1175c
JS		 426
427 /* Check which interrupt is in use */
428 irq = probe_irq_off(irqs);
429
430 /* Clean up */
db05c3b1
JS		 431 save_xir = (u_char) readb(address + (CyTIR << index));
432 save_car = readb(address + (CyCAR << index));
02f1175c
JS		 433 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
434 cy_writeb(address + (CySRER << index),
db05c3b1 435 readb(address + (CySRER << index)) & ~CyTxRdy);
02f1175c
JS		 436 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
437 cy_writeb(address + (CyCAR << index), (save_car));
438 cy_writeb(address + (Cy_ClrIntr << index), 0);
439 /* Cy_ClrIntr is 0x1800 */
440
441 return (irq > 0) ? irq : 0;
1da177e4 442}
02f1175c 443#endif /* CONFIG_ISA */
1da177e4 444
ce97a097
JS		 445static void cyy_chip_rx(struct cyclades_card *cinfo, int chip,
446 void __iomem *base_addr)
e941027f
JS		 447{
448 struct cyclades_port *info;
449 struct tty_struct *tty;
65f76a82 450 int len, index = cinfo->bus_index;
3aeea5b9 451 u8 ivr, save_xir, channel, save_car, data, char_count;
e941027f 452
e941027f 453#ifdef CY_DEBUG_INTERRUPTS
ce97a097 454 printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
e941027f 455#endif
ce97a097 456 /* determine the channel & change to that context */
65f76a82
JS		 457 save_xir = readb(base_addr + (CyRIR << index));
458 channel = save_xir & CyIRChannel;
ce97a097 459 info = &cinfo->ports[channel + chip * 4];
3aeea5b9
JS		 460 save_car = cyy_readb(info, CyCAR);
461 cyy_writeb(info, CyCAR, save_xir);
462 ivr = cyy_readb(info, CyRIVR) & CyIVRMask;
ce97a097 463
d13549f8 464 tty = tty_port_tty_get(&info->port);
ce97a097 465 /* if there is nowhere to put the data, discard it */
d13549f8 466 if (tty == NULL) {
3aeea5b9
JS		 467 if (ivr == CyIVRRxEx) { /* exception */
468 data = cyy_readb(info, CyRDSR);
ce97a097 469 } else { /* normal character reception */
3aeea5b9 470 char_count = cyy_readb(info, CyRDCR);
ce97a097 471 while (char_count--)
3aeea5b9 472 data = cyy_readb(info, CyRDSR);
ce97a097
JS		 473 }
474 goto end;
475 }
476 /* there is an open port for this data */
3aeea5b9
JS		 477 if (ivr == CyIVRRxEx) { /* exception */
478 data = cyy_readb(info, CyRDSR);
ce97a097
JS		 479
480 /* For statistics only */
481 if (data & CyBREAK)
482 info->icount.brk++;
483 else if (data & CyFRAME)
484 info->icount.frame++;
485 else if (data & CyPARITY)
486 info->icount.parity++;
487 else if (data & CyOVERRUN)
488 info->icount.overrun++;
489
490 if (data & info->ignore_status_mask) {
491 info->icount.rx++;
d13549f8 492 tty_kref_put(tty);
ce97a097
JS		 493 return;
494 }
495 if (tty_buffer_request_room(tty, 1)) {
496 if (data & info->read_status_mask) {
497 if (data & CyBREAK) {
498 tty_insert_flip_char(tty,
3aeea5b9
JS		 499 cyy_readb(info, CyRDSR),
500 TTY_BREAK);
ce97a097 501 info->icount.rx++;
77451e53 502 if (info->port.flags & ASYNC_SAK)
ce97a097
JS		 503 do_SAK(tty);
504 } else if (data & CyFRAME) {
15ed6cc0 505 tty_insert_flip_char(tty,
3aeea5b9
JS		 506 cyy_readb(info, CyRDSR),
507 TTY_FRAME);
ce97a097
JS		 508 info->icount.rx++;
509 info->idle_stats.frame_errs++;
510 } else if (data & CyPARITY) {
511 /* Pieces of seven... */
512 tty_insert_flip_char(tty,
3aeea5b9
JS		 513 cyy_readb(info, CyRDSR),
514 TTY_PARITY);
ce97a097
JS		 515 info->icount.rx++;
516 info->idle_stats.parity_errs++;
517 } else if (data & CyOVERRUN) {
518 tty_insert_flip_char(tty, 0,
519 TTY_OVERRUN);
520 info->icount.rx++;
521 /* If the flip buffer itself is
522 overflowing, we still lose
523 the next incoming character.
524 */
525 tty_insert_flip_char(tty,
3aeea5b9
JS		 526 cyy_readb(info, CyRDSR),
527 TTY_FRAME);
02f1175c 528 info->icount.rx++;
02f1175c 529 info->idle_stats.overruns++;
ce97a097
JS		 530 /* These two conditions may imply */
531 /* a normal read should be done. */
532 /* } else if(data & CyTIMEOUT) { */
533 /* } else if(data & CySPECHAR) { */
534 } else {
535 tty_insert_flip_char(tty, 0,
536 TTY_NORMAL);
537 info->icount.rx++;
02f1175c 538 }
ce97a097
JS		 539 } else {
540 tty_insert_flip_char(tty, 0, TTY_NORMAL);
541 info->icount.rx++;
542 }
543 } else {
544 /* there was a software buffer overrun and nothing
545 * could be done about it!!! */
546 info->icount.buf_overrun++;
547 info->idle_stats.overruns++;
548 }
549 } else { /* normal character reception */
550 /* load # chars available from the chip */
3aeea5b9 551 char_count = cyy_readb(info, CyRDCR);
e941027f
JS		 552
553#ifdef CY_ENABLE_MONITORING
ce97a097
JS		 554 ++info->mon.int_count;
555 info->mon.char_count += char_count;
556 if (char_count > info->mon.char_max)
557 info->mon.char_max = char_count;
558 info->mon.char_last = char_count;
e941027f 559#endif
ce97a097
JS		 560 len = tty_buffer_request_room(tty, char_count);
561 while (len--) {
3aeea5b9 562 data = cyy_readb(info, CyRDSR);
ce97a097
JS		 563 tty_insert_flip_char(tty, data, TTY_NORMAL);
564 info->idle_stats.recv_bytes++;
565 info->icount.rx++;
e941027f 566#ifdef CY_16Y_HACK
ce97a097 567 udelay(10L);
e941027f 568#endif
e941027f 569 }
ce97a097 570 info->idle_stats.recv_idle = jiffies;
e941027f 571 }
ce97a097 572 tty_schedule_flip(tty);
d13549f8 573 tty_kref_put(tty);
ce97a097
JS		 574end:
575 /* end of service */
3aeea5b9
JS		 576 cyy_writeb(info, CyRIR, save_xir & 0x3f);
577 cyy_writeb(info, CyCAR, save_car);
ce97a097 578}
e941027f 579
65f76a82 580static void cyy_chip_tx(struct cyclades_card *cinfo, unsigned int chip,
ce97a097
JS		 581 void __iomem *base_addr)
582{
583 struct cyclades_port *info;
d13549f8 584 struct tty_struct *tty;
65f76a82
JS		 585 int char_count, index = cinfo->bus_index;
586 u8 save_xir, channel, save_car, outch;
ce97a097
JS		 587
588 /* Since we only get here when the transmit buffer
589 is empty, we know we can always stuff a dozen
590 characters. */
e941027f 591#ifdef CY_DEBUG_INTERRUPTS
ce97a097 592 printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
e941027f
JS		 593#endif
594
ce97a097 595 /* determine the channel & change to that context */
65f76a82
JS		 596 save_xir = readb(base_addr + (CyTIR << index));
597 channel = save_xir & CyIRChannel;
ce97a097
JS		 598 save_car = readb(base_addr + (CyCAR << index));
599 cy_writeb(base_addr + (CyCAR << index), save_xir);
600
601 /* validate the port# (as configured and open) */
602 if (channel + chip * 4 >= cinfo->nports) {
603 cy_writeb(base_addr + (CySRER << index),
604 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
605 goto end;
606 }
607 info = &cinfo->ports[channel + chip * 4];
d13549f8
JS		 608 tty = tty_port_tty_get(&info->port);
609 if (tty == NULL) {
3aeea5b9 610 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyTxRdy);
ce97a097
JS		 611 goto end;
612 }
02f1175c 613
ce97a097
JS		 614 /* load the on-chip space for outbound data */
615 char_count = info->xmit_fifo_size;
02f1175c 616
ce97a097
JS		 617 if (info->x_char) { /* send special char */
618 outch = info->x_char;
3aeea5b9 619 cyy_writeb(info, CyTDR, outch);
ce97a097
JS		 620 char_count--;
621 info->icount.tx++;
622 info->x_char = 0;
623 }
02f1175c 624
ce97a097
JS		 625 if (info->breakon || info->breakoff) {
626 if (info->breakon) {
3aeea5b9
JS		 627 cyy_writeb(info, CyTDR, 0);
628 cyy_writeb(info, CyTDR, 0x81);
ce97a097
JS		 629 info->breakon = 0;
630 char_count -= 2;
e941027f 631 }
ce97a097 632 if (info->breakoff) {
3aeea5b9
JS		 633 cyy_writeb(info, CyTDR, 0);
634 cyy_writeb(info, CyTDR, 0x83);
ce97a097
JS		 635 info->breakoff = 0;
636 char_count -= 2;
e941027f 637 }
ce97a097 638 }
02f1175c 639
ce97a097
JS		 640 while (char_count-- > 0) {
641 if (!info->xmit_cnt) {
3aeea5b9
JS		 642 if (cyy_readb(info, CySRER) & CyTxMpty) {
643 cyy_writeb(info, CySRER,
644 cyy_readb(info, CySRER) & ~CyTxMpty);
ce97a097 645 } else {
3aeea5b9
JS		 646 cyy_writeb(info, CySRER, CyTxMpty |
647 (cyy_readb(info, CySRER) & ~CyTxRdy));
02f1175c 648 }
ce97a097
JS		 649 goto done;
650 }
77451e53 651 if (info->port.xmit_buf == NULL) {
3aeea5b9
JS		 652 cyy_writeb(info, CySRER,
653 cyy_readb(info, CySRER) & ~CyTxRdy);
ce97a097
JS		 654 goto done;
655 }
d13549f8 656 if (tty->stopped || tty->hw_stopped) {
3aeea5b9
JS		 657 cyy_writeb(info, CySRER,
658 cyy_readb(info, CySRER) & ~CyTxRdy);
ce97a097
JS		 659 goto done;
660 }
661 /* Because the Embedded Transmit Commands have been enabled,
662 * we must check to see if the escape character, NULL, is being
663 * sent. If it is, we must ensure that there is room for it to
664 * be doubled in the output stream. Therefore we no longer
665 * advance the pointer when the character is fetched, but
666 * rather wait until after the check for a NULL output
667 * character. This is necessary because there may not be room
668 * for the two chars needed to send a NULL.)
669 */
77451e53 670 outch = info->port.xmit_buf[info->xmit_tail];
ce97a097
JS		 671 if (outch) {
672 info->xmit_cnt--;
673 info->xmit_tail = (info->xmit_tail + 1) &
674 (SERIAL_XMIT_SIZE - 1);
3aeea5b9 675 cyy_writeb(info, CyTDR, outch);
ce97a097
JS		 676 info->icount.tx++;
677 } else {
678 if (char_count > 1) {
02f1175c
JS		 679 info->xmit_cnt--;
680 info->xmit_tail = (info->xmit_tail + 1) &
ce97a097 681 (SERIAL_XMIT_SIZE - 1);
3aeea5b9
JS		 682 cyy_writeb(info, CyTDR, outch);
683 cyy_writeb(info, CyTDR, 0);
02f1175c 684 info->icount.tx++;
ce97a097 685 char_count--;
02f1175c 686 }
e941027f 687 }
e941027f
JS		 688 }
689
ce97a097 690done:
d13549f8
JS		 691 tty_wakeup(tty);
692 tty_kref_put(tty);
ce97a097
JS		 693end:
694 /* end of service */
3aeea5b9
JS		 695 cyy_writeb(info, CyTIR, save_xir & 0x3f);
696 cyy_writeb(info, CyCAR, save_car);
ce97a097 697}
02f1175c 698
ce97a097
JS		 699static void cyy_chip_modem(struct cyclades_card *cinfo, int chip,
700 void __iomem *base_addr)
701{
702 struct cyclades_port *info;
d13549f8 703 struct tty_struct *tty;
65f76a82
JS		 704 int index = cinfo->bus_index;
705 u8 save_xir, channel, save_car, mdm_change, mdm_status;
ce97a097
JS		 706
707 /* determine the channel & change to that context */
65f76a82
JS		 708 save_xir = readb(base_addr + (CyMIR << index));
709 channel = save_xir & CyIRChannel;
ce97a097 710 info = &cinfo->ports[channel + chip * 4];
3aeea5b9
JS		 711 save_car = cyy_readb(info, CyCAR);
712 cyy_writeb(info, CyCAR, save_xir);
ce97a097 713
3aeea5b9
JS		 714 mdm_change = cyy_readb(info, CyMISR);
715 mdm_status = cyy_readb(info, CyMSVR1);
ce97a097 716
d13549f8
JS		 717 tty = tty_port_tty_get(&info->port);
718 if (!tty)
ce97a097
JS		 719 goto end;
720
721 if (mdm_change & CyANY_DELTA) {
722 /* For statistics only */
723 if (mdm_change & CyDCD)
724 info->icount.dcd++;
725 if (mdm_change & CyCTS)
726 info->icount.cts++;
727 if (mdm_change & CyDSR)
728 info->icount.dsr++;
729 if (mdm_change & CyRI)
730 info->icount.rng++;
731
732 wake_up_interruptible(&info->delta_msr_wait);
733 }
734
77451e53 735 if ((mdm_change & CyDCD) && (info->port.flags & ASYNC_CHECK_CD)) {
174e6fe0
JS		 736 if (mdm_status & CyDCD)
737 wake_up_interruptible(&info->port.open_wait);
738 else
d13549f8 739 tty_hangup(tty);
ce97a097 740 }
77451e53 741 if ((mdm_change & CyCTS) && (info->port.flags & ASYNC_CTS_FLOW)) {
d13549f8 742 if (tty->hw_stopped) {
ce97a097
JS		 743 if (mdm_status & CyCTS) {
744 /* cy_start isn't used
745 because... !!! */
d13549f8 746 tty->hw_stopped = 0;
3aeea5b9
JS		 747 cyy_writeb(info, CySRER,
748 cyy_readb(info, CySRER) | CyTxRdy);
d13549f8 749 tty_wakeup(tty);
02f1175c 750 }
ce97a097
JS		 751 } else {
752 if (!(mdm_status & CyCTS)) {
753 /* cy_stop isn't used
754 because ... !!! */
d13549f8 755 tty->hw_stopped = 1;
3aeea5b9
JS		 756 cyy_writeb(info, CySRER,
757 cyy_readb(info, CySRER) & ~CyTxRdy);
02f1175c 758 }
e941027f 759 }
e941027f 760 }
ce97a097
JS		 761/* if (mdm_change & CyDSR) {
762 }
763 if (mdm_change & CyRI) {
764 }*/
d13549f8 765 tty_kref_put(tty);
ce97a097
JS		 766end:
767 /* end of service */
3aeea5b9
JS		 768 cyy_writeb(info, CyMIR, save_xir & 0x3f);
769 cyy_writeb(info, CyCAR, save_car);
e941027f
JS		 770}
771
1da177e4
LT		 772/* The real interrupt service routine is called
773 whenever the card wants its hand held--chars
774 received, out buffer empty, modem change, etc.
775 */
02f1175c 776static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1da177e4 777{
02f1175c 778 int status;
f7429034 779 struct cyclades_card *cinfo = dev_id;
02f1175c 780 void __iomem *base_addr, *card_base_addr;
65f76a82 781 unsigned int chip, too_many, had_work;
02f1175c 782 int index;
02f1175c 783
f7429034 784 if (unlikely(cinfo == NULL)) {
1da177e4 785#ifdef CY_DEBUG_INTERRUPTS
15ed6cc0
AC		 786 printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",
787 irq);
1da177e4 788#endif
02f1175c
JS		 789 return IRQ_NONE; /* spurious interrupt */
790 }
791
792 card_base_addr = cinfo->base_addr;
793 index = cinfo->bus_index;
794
f1e83c6c
JS		 795 /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
796 if (unlikely(card_base_addr == NULL))
797 return IRQ_HANDLED;
798
02f1175c
JS		 799 /* This loop checks all chips in the card. Make a note whenever
800 _any_ chip had some work to do, as this is considered an
801 indication that there will be more to do. Only when no chip
802 has any work does this outermost loop exit.
803 */
804 do {
805 had_work = 0;
806 for (chip = 0; chip < cinfo->num_chips; chip++) {
807 base_addr = cinfo->base_addr +
808 (cy_chip_offset[chip] << index);
809 too_many = 0;
db05c3b1 810 while ((status = readb(base_addr +
02f1175c
JS		 811 (CySVRR << index))) != 0x00) {
812 had_work++;
813 /* The purpose of the following test is to ensure that
814 no chip can monopolize the driver. This forces the
815 chips to be checked in a round-robin fashion (after
816 draining each of a bunch (1000) of characters).
817 */
ce97a097 818 if (1000 < too_many++)
02f1175c 819 break;
1c0a387c 820 spin_lock(&cinfo->card_lock);
ce97a097
JS		 821 if (status & CySRReceive) /* rx intr */
822 cyy_chip_rx(cinfo, chip, base_addr);
823 if (status & CySRTransmit) /* tx intr */
824 cyy_chip_tx(cinfo, chip, base_addr);
825 if (status & CySRModem) /* modem intr */
826 cyy_chip_modem(cinfo, chip, base_addr);
1c0a387c 827 spin_unlock(&cinfo->card_lock);
02f1175c
JS		 828 }
829 }
830 } while (had_work);
831
832 /* clear interrupts */
833 spin_lock(&cinfo->card_lock);
834 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
835 /* Cy_ClrIntr is 0x1800 */
836 spin_unlock(&cinfo->card_lock);
837 return IRQ_HANDLED;
838} /* cyy_interrupt */
1da177e4 839
4d768200
JS		 840static void cyy_change_rts_dtr(struct cyclades_port *info, unsigned int set,
841 unsigned int clear)
842{
843 struct cyclades_card *card = info->card;
3aeea5b9 844 int channel = info->line - card->first_line;
0d348729 845 u32 rts, dtr, msvrr, msvrd;
4d768200 846
4d768200 847 channel &= 0x03;
4d768200 848
0d348729
JS		 849 if (info->rtsdtr_inv) {
850 msvrr = CyMSVR2;
851 msvrd = CyMSVR1;
852 rts = CyDTR;
853 dtr = CyRTS;
854 } else {
855 msvrr = CyMSVR1;
856 msvrd = CyMSVR2;
857 rts = CyRTS;
858 dtr = CyDTR;
859 }
4d768200 860 if (set & TIOCM_RTS) {
3aeea5b9
JS		 861 cyy_writeb(info, CyCAR, channel);
862 cyy_writeb(info, msvrr, rts);
4d768200
JS		 863 }
864 if (clear & TIOCM_RTS) {
3aeea5b9
JS		 865 cyy_writeb(info, CyCAR, channel);
866 cyy_writeb(info, msvrr, ~rts);
4d768200
JS		 867 }
868 if (set & TIOCM_DTR) {
3aeea5b9
JS		 869 cyy_writeb(info, CyCAR, channel);
870 cyy_writeb(info, msvrd, dtr);
4d768200
JS		 871#ifdef CY_DEBUG_DTR
872 printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
873 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3aeea5b9
JS		 874 cyy_readb(info, CyMSVR1),
875 cyy_readb(info, CyMSVR2));
4d768200
JS		 876#endif
877 }
878 if (clear & TIOCM_DTR) {
3aeea5b9
JS		 879 cyy_writeb(info, CyCAR, channel);
880 cyy_writeb(info, msvrd, ~dtr);
4d768200
JS		 881#ifdef CY_DEBUG_DTR
882 printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
883 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
3aeea5b9
JS		 884 cyy_readb(info, CyMSVR1),
885 cyy_readb(info, CyMSVR2));
4d768200
JS		 886#endif
887 }
888}
889
1da177e4
LT		 890/***********************************************************/
891/********* End of block of Cyclom-Y specific code **********/
15ed6cc0 892/******** Start of block of Cyclades-Z specific code *******/
1da177e4
LT		 893/***********************************************************/
894
895static int
02f1175c 896cyz_fetch_msg(struct cyclades_card *cinfo,
15ed6cc0 897 __u32 *channel, __u8 *cmd, __u32 *param)
1da177e4 898{
f0eefdc3 899 struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
02f1175c
JS		 900 unsigned long loc_doorbell;
901
97e87f8e 902 loc_doorbell = readl(&cinfo->ctl_addr.p9060->loc_doorbell);
02f1175c
JS		 903 if (loc_doorbell) {
904 *cmd = (char)(0xff & loc_doorbell);
db05c3b1
JS		 905 *channel = readl(&board_ctrl->fwcmd_channel);
906 *param = (__u32) readl(&board_ctrl->fwcmd_param);
97e87f8e 907 cy_writel(&cinfo->ctl_addr.p9060->loc_doorbell, 0xffffffff);
02f1175c
JS		 908 return 1;
909 }
910 return 0;
911} /* cyz_fetch_msg */
1da177e4
LT		 912
913static int
02f1175c 914cyz_issue_cmd(struct cyclades_card *cinfo,
1a86b5e3 915 __u32 channel, __u8 cmd, __u32 param)
1da177e4 916{
f0eefdc3 917 struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
1a86b5e3 918 __u32 __iomem *pci_doorbell;
65f76a82 919 unsigned int index;
02f1175c 920
2693f485 921 if (!cyz_is_loaded(cinfo))
096dcfce 922 return -1;
15ed6cc0 923
02f1175c 924 index = 0;
97e87f8e 925 pci_doorbell = &cinfo->ctl_addr.p9060->pci_doorbell;
db05c3b1 926 while ((readl(pci_doorbell) & 0xff) != 0) {
15ed6cc0 927 if (index++ == 1000)
db05c3b1 928 return (int)(readl(pci_doorbell) & 0xff);
02f1175c
JS		 929 udelay(50L);
930 }
931 cy_writel(&board_ctrl->hcmd_channel, channel);
932 cy_writel(&board_ctrl->hcmd_param, param);
933 cy_writel(pci_doorbell, (long)cmd);
934
096dcfce 935 return 0;
02f1175c 936} /* cyz_issue_cmd */
1da177e4 937
f0eefdc3 938static void cyz_handle_rx(struct cyclades_port *info, struct tty_struct *tty)
1da177e4 939{
f0eefdc3 940 struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
875b206b 941 struct cyclades_card *cinfo = info->card;
65f76a82 942 unsigned int char_count;
02f1175c 943 int len;
1da177e4 944#ifdef BLOCKMOVE
ce71b0ff 945 unsigned char *buf;
1da177e4 946#else
02f1175c 947 char data;
1da177e4 948#endif
ad39c300 949 __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1da177e4 950
db05c3b1
JS		 951 rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
952 rx_put = readl(&buf_ctrl->rx_put);
953 rx_bufsize = readl(&buf_ctrl->rx_bufsize);
954 rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
02f1175c
JS		 955 if (rx_put >= rx_get)
956 char_count = rx_put - rx_get;
957 else
958 char_count = rx_put - rx_get + rx_bufsize;
1da177e4 959
02f1175c 960 if (char_count) {
1da177e4 961#ifdef CY_ENABLE_MONITORING
02f1175c
JS		 962 info->mon.int_count++;
963 info->mon.char_count += char_count;
964 if (char_count > info->mon.char_max)
965 info->mon.char_max = char_count;
966 info->mon.char_last = char_count;
1da177e4 967#endif
f7429034 968 if (tty == NULL) {
02f1175c
JS		 969 /* flush received characters */
970 new_rx_get = (new_rx_get + char_count) &
971 (rx_bufsize - 1);
972 info->rflush_count++;
973 } else {
1da177e4 974#ifdef BLOCKMOVE
02f1175c
JS		 975 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
976 for performance, but because of buffer boundaries, there
977 may be several steps to the operation */
ce71b0ff
JS		 978 while (1) {
979 len = tty_prepare_flip_string(tty, &buf,
980 char_count);
981 if (!len)
982 break;
983
984 len = min_t(unsigned int, min(len, char_count),
985 rx_bufsize - new_rx_get);
986
987 memcpy_fromio(buf, cinfo->base_addr +
988 rx_bufaddr + new_rx_get, len);
989
990 new_rx_get = (new_rx_get + len) &
02f1175c 991 (rx_bufsize - 1);
ce71b0ff
JS		 992 char_count -= len;
993 info->icount.rx += len;
994 info->idle_stats.recv_bytes += len;
02f1175c 995 }
1da177e4 996#else
02f1175c
JS		 997 len = tty_buffer_request_room(tty, char_count);
998 while (len--) {
db05c3b1 999 data = readb(cinfo->base_addr + rx_bufaddr +
02f1175c 1000 new_rx_get);
15ed6cc0
AC		 1001 new_rx_get = (new_rx_get + 1) &
1002 (rx_bufsize - 1);
02f1175c
JS		 1003 tty_insert_flip_char(tty, data, TTY_NORMAL);
1004 info->idle_stats.recv_bytes++;
1005 info->icount.rx++;
1006 }
1da177e4
LT		 1007#endif
1008#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 1009 /* Recalculate the number of chars in the RX buffer and issue
1010 a cmd in case it's higher than the RX high water mark */
db05c3b1 1011 rx_put = readl(&buf_ctrl->rx_put);
02f1175c
JS		 1012 if (rx_put >= rx_get)
1013 char_count = rx_put - rx_get;
1014 else
1015 char_count = rx_put - rx_get + rx_bufsize;
65f76a82 1016 if (char_count >= readl(&buf_ctrl->rx_threshold) &&
ebafeeff
JS		 1017 !timer_pending(&cyz_rx_full_timer[
1018 info->line]))
1019 mod_timer(&cyz_rx_full_timer[info->line],
1020 jiffies + 1);
1da177e4 1021#endif
02f1175c
JS		 1022 info->idle_stats.recv_idle = jiffies;
1023 tty_schedule_flip(tty);
1024 }
1025 /* Update rx_get */
1026 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1da177e4 1027 }
1da177e4
LT		 1028}
1029
f0eefdc3 1030static void cyz_handle_tx(struct cyclades_port *info, struct tty_struct *tty)
1da177e4 1031{
f0eefdc3 1032 struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
875b206b 1033 struct cyclades_card *cinfo = info->card;
65f76a82
JS		 1034 u8 data;
1035 unsigned int char_count;
1da177e4 1036#ifdef BLOCKMOVE
02f1175c 1037 int small_count;
1da177e4 1038#endif
ad39c300 1039 __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1da177e4 1040
02f1175c
JS		 1041 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1042 return;
1da177e4 1043
db05c3b1
JS		 1044 tx_get = readl(&buf_ctrl->tx_get);
1045 tx_put = readl(&buf_ctrl->tx_put);
1046 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1047 tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
02f1175c
JS		 1048 if (tx_put >= tx_get)
1049 char_count = tx_get - tx_put - 1 + tx_bufsize;
1050 else
1051 char_count = tx_get - tx_put - 1;
1da177e4 1052
02f1175c 1053 if (char_count) {
1da177e4 1054
f7429034 1055 if (tty == NULL)
02f1175c 1056 goto ztxdone;
1da177e4 1057
02f1175c
JS		 1058 if (info->x_char) { /* send special char */
1059 data = info->x_char;
1da177e4 1060
02f1175c
JS		 1061 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1062 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1063 info->x_char = 0;
1064 char_count--;
1065 info->icount.tx++;
02f1175c 1066 }
1da177e4 1067#ifdef BLOCKMOVE
02f1175c
JS		 1068 while (0 < (small_count = min_t(unsigned int,
1069 tx_bufsize - tx_put, min_t(unsigned int,
1070 (SERIAL_XMIT_SIZE - info->xmit_tail),
1071 min_t(unsigned int, info->xmit_cnt,
1072 char_count))))) {
1073
1074 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1075 tx_put),
77451e53 1076 &info->port.xmit_buf[info->xmit_tail],
02f1175c
JS		 1077 small_count);
1078
1079 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1080 char_count -= small_count;
1081 info->icount.tx += small_count;
1082 info->xmit_cnt -= small_count;
1083 info->xmit_tail = (info->xmit_tail + small_count) &
1084 (SERIAL_XMIT_SIZE - 1);
02f1175c 1085 }
1da177e4 1086#else
02f1175c 1087 while (info->xmit_cnt && char_count) {
77451e53 1088 data = info->port.xmit_buf[info->xmit_tail];
02f1175c
JS		 1089 info->xmit_cnt--;
1090 info->xmit_tail = (info->xmit_tail + 1) &
1091 (SERIAL_XMIT_SIZE - 1);
1092
1093 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1094 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1095 char_count--;
1096 info->icount.tx++;
02f1175c 1097 }
1da177e4 1098#endif
ebafeeff 1099 tty_wakeup(tty);
7fa57a0c 1100ztxdone:
02f1175c
JS		 1101 /* Update tx_put */
1102 cy_writel(&buf_ctrl->tx_put, tx_put);
1da177e4 1103 }
1da177e4
LT		 1104}
1105
02f1175c 1106static void cyz_handle_cmd(struct cyclades_card *cinfo)
1da177e4 1107{
f0eefdc3 1108 struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
02f1175c
JS		 1109 struct tty_struct *tty;
1110 struct cyclades_port *info;
101b8159 1111 __u32 channel, param, fw_ver;
1a86b5e3 1112 __u8 cmd;
02f1175c
JS		 1113 int special_count;
1114 int delta_count;
1115
db05c3b1 1116 fw_ver = readl(&board_ctrl->fw_version);
02f1175c
JS		 1117
1118 while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1119 special_count = 0;
1120 delta_count = 0;
dd025c0c 1121 info = &cinfo->ports[channel];
d13549f8 1122 tty = tty_port_tty_get(&info->port);
15ed6cc0 1123 if (tty == NULL)
02f1175c 1124 continue;
f7429034 1125
02f1175c
JS		 1126 switch (cmd) {
1127 case C_CM_PR_ERROR:
1128 tty_insert_flip_char(tty, 0, TTY_PARITY);
1129 info->icount.rx++;
1130 special_count++;
1131 break;
1132 case C_CM_FR_ERROR:
1133 tty_insert_flip_char(tty, 0, TTY_FRAME);
1134 info->icount.rx++;
1135 special_count++;
1136 break;
1137 case C_CM_RXBRK:
1138 tty_insert_flip_char(tty, 0, TTY_BREAK);
1139 info->icount.rx++;
1140 special_count++;
1141 break;
1142 case C_CM_MDCD:
1143 info->icount.dcd++;
1144 delta_count++;
77451e53 1145 if (info->port.flags & ASYNC_CHECK_CD) {
f0eefdc3
JS		 1146 u32 dcd = fw_ver > 241 ? param :
1147 readl(&info->u.cyz.ch_ctrl->rs_status);
174e6fe0 1148 if (dcd & C_RS_DCD)
77451e53 1149 wake_up_interruptible(&info->port.open_wait);
174e6fe0 1150 else
d13549f8 1151 tty_hangup(tty);
02f1175c
JS		 1152 }
1153 break;
1154 case C_CM_MCTS:
1155 info->icount.cts++;
1156 delta_count++;
1157 break;
1158 case C_CM_MRI:
1159 info->icount.rng++;
1160 delta_count++;
1161 break;
1162 case C_CM_MDSR:
1163 info->icount.dsr++;
1164 delta_count++;
1165 break;
1da177e4 1166#ifdef Z_WAKE
02f1175c 1167 case C_CM_IOCTLW:
ebafeeff 1168 complete(&info->shutdown_wait);
02f1175c 1169 break;
1da177e4
LT		 1170#endif
1171#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 1172 case C_CM_RXHIWM:
1173 case C_CM_RXNNDT:
1174 case C_CM_INTBACK2:
1175 /* Reception Interrupt */
1da177e4 1176#ifdef CY_DEBUG_INTERRUPTS
21719191
JS		 1177 printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
1178 "port %ld\n", info->card, channel);
1da177e4 1179#endif
f0eefdc3 1180 cyz_handle_rx(info, tty);
02f1175c
JS		 1181 break;
1182 case C_CM_TXBEMPTY:
1183 case C_CM_TXLOWWM:
1184 case C_CM_INTBACK:
1185 /* Transmission Interrupt */
1da177e4 1186#ifdef CY_DEBUG_INTERRUPTS
21719191
JS		 1187 printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
1188 "port %ld\n", info->card, channel);
1da177e4 1189#endif
f0eefdc3 1190 cyz_handle_tx(info, tty);
02f1175c
JS		 1191 break;
1192#endif /* CONFIG_CYZ_INTR */
1193 case C_CM_FATAL:
1194 /* should do something with this !!! */
1195 break;
1196 default:
1197 break;
1198 }
1199 if (delta_count)
ebafeeff 1200 wake_up_interruptible(&info->delta_msr_wait);
02f1175c
JS		 1201 if (special_count)
1202 tty_schedule_flip(tty);
d13549f8 1203 tty_kref_put(tty);
1da177e4 1204 }
1da177e4
LT		 1205}
1206
1207#ifdef CONFIG_CYZ_INTR
02f1175c 1208static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1da177e4 1209{
f7429034 1210 struct cyclades_card *cinfo = dev_id;
1da177e4 1211
2693f485 1212 if (unlikely(!cyz_is_loaded(cinfo))) {
1da177e4 1213#ifdef CY_DEBUG_INTERRUPTS
21719191
JS		 1214 printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
1215 "(IRQ%d).\n", irq);
1da177e4 1216#endif
02f1175c
JS		 1217 return IRQ_NONE;
1218 }
1da177e4 1219
02f1175c
JS		 1220 /* Handle the interrupts */
1221 cyz_handle_cmd(cinfo);
1da177e4 1222
02f1175c
JS		 1223 return IRQ_HANDLED;
1224} /* cyz_interrupt */
1da177e4 1225
02f1175c 1226static void cyz_rx_restart(unsigned long arg)
1da177e4 1227{
02f1175c 1228 struct cyclades_port *info = (struct cyclades_port *)arg;
875b206b 1229 struct cyclades_card *card = info->card;
02f1175c 1230 int retval;
875b206b 1231 __u32 channel = info->line - card->first_line;
02f1175c
JS		 1232 unsigned long flags;
1233
9fa1b3b1 1234 spin_lock_irqsave(&card->card_lock, flags);
875b206b 1235 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
02f1175c 1236 if (retval != 0) {
21719191 1237 printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
02f1175c
JS		 1238 info->line, retval);
1239 }
9fa1b3b1 1240 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4
LT		 1241}
1242
02f1175c 1243#else /* CONFIG_CYZ_INTR */
1da177e4 1244
02f1175c 1245static void cyz_poll(unsigned long arg)
1da177e4 1246{
02f1175c
JS		 1247 struct cyclades_card *cinfo;
1248 struct cyclades_port *info;
b7050906 1249 unsigned long expires = jiffies + HZ;
65f76a82 1250 unsigned int port, card;
1da177e4 1251
02f1175c
JS		 1252 for (card = 0; card < NR_CARDS; card++) {
1253 cinfo = &cy_card[card];
1254
2693f485 1255 if (!cy_is_Z(cinfo))
02f1175c 1256 continue;
2693f485 1257 if (!cyz_is_loaded(cinfo))
02f1175c
JS		 1258 continue;
1259
1da177e4 1260 /* Skip first polling cycle to avoid racing conditions with the FW */
02f1175c 1261 if (!cinfo->intr_enabled) {
02f1175c
JS		 1262 cinfo->intr_enabled = 1;
1263 continue;
1264 }
1da177e4 1265
02f1175c 1266 cyz_handle_cmd(cinfo);
1da177e4 1267
02f1175c 1268 for (port = 0; port < cinfo->nports; port++) {
d13549f8
JS		 1269 struct tty_struct *tty;
1270
dd025c0c 1271 info = &cinfo->ports[port];
d13549f8
JS		 1272 tty = tty_port_tty_get(&info->port);
1273 /* OK to pass NULL to the handle functions below.
1274 They need to drop the data in that case. */
1275
02f1175c 1276 if (!info->throttle)
f0eefdc3
JS		 1277 cyz_handle_rx(info, tty);
1278 cyz_handle_tx(info, tty);
d13549f8 1279 tty_kref_put(tty);
02f1175c
JS		 1280 }
1281 /* poll every 'cyz_polling_cycle' period */
b7050906 1282 expires = jiffies + cyz_polling_cycle;
1da177e4 1283 }
b7050906 1284 mod_timer(&cyz_timerlist, expires);
02f1175c 1285} /* cyz_poll */
1da177e4 1286
02f1175c 1287#endif /* CONFIG_CYZ_INTR */
1da177e4
LT		 1288
1289/********** End of block of Cyclades-Z specific code *********/
1290/***********************************************************/
1291
1da177e4
LT		 1292/* This is called whenever a port becomes active;
1293 interrupts are enabled and DTR & RTS are turned on.
1294 */
d13549f8 1295static int cy_startup(struct cyclades_port *info, struct tty_struct *tty)
1da177e4 1296{
875b206b 1297 struct cyclades_card *card;
02f1175c
JS		 1298 unsigned long flags;
1299 int retval = 0;
cc7fdf49 1300 int channel;
02f1175c 1301 unsigned long page;
1da177e4 1302
02f1175c 1303 card = info->card;
875b206b 1304 channel = info->line - card->first_line;
1da177e4 1305
02f1175c
JS		 1306 page = get_zeroed_page(GFP_KERNEL);
1307 if (!page)
1308 return -ENOMEM;
1da177e4 1309
9fa1b3b1 1310 spin_lock_irqsave(&card->card_lock, flags);
1da177e4 1311
cc7fdf49 1312 if (info->port.flags & ASYNC_INITIALIZED)
02f1175c 1313 goto errout;
1da177e4 1314
02f1175c 1315 if (!info->type) {
d13549f8 1316 set_bit(TTY_IO_ERROR, &tty->flags);
02f1175c
JS		 1317 goto errout;
1318 }
1da177e4 1319
77451e53 1320 if (info->port.xmit_buf)
02f1175c
JS		 1321 free_page(page);
1322 else
77451e53 1323 info->port.xmit_buf = (unsigned char *)page;
1da177e4 1324
9fa1b3b1 1325 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 1326
d13549f8 1327 cy_set_line_char(info, tty);
1da177e4 1328
2693f485 1329 if (!cy_is_Z(card)) {
02f1175c 1330 channel &= 0x03;
1da177e4 1331
9fa1b3b1 1332 spin_lock_irqsave(&card->card_lock, flags);
1da177e4 1333
3aeea5b9 1334 cyy_writeb(info, CyCAR, channel);
1da177e4 1335
3aeea5b9 1336 cyy_writeb(info, CyRTPR,
02f1175c
JS		 1337 (info->default_timeout ? info->default_timeout : 0x02));
1338 /* 10ms rx timeout */
1da177e4 1339
3aeea5b9 1340 cyy_issue_cmd(info, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR);
1da177e4 1341
4d768200 1342 cyy_change_rts_dtr(info, TIOCM_RTS | TIOCM_DTR, 0);
1da177e4 1343
3aeea5b9 1344 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyRxData);
02f1175c 1345 } else {
f0eefdc3 1346 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
1da177e4 1347
2693f485 1348 if (!cyz_is_loaded(card))
02f1175c 1349 return -ENODEV;
1da177e4 1350
1da177e4 1351#ifdef CY_DEBUG_OPEN
21719191 1352 printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
f0eefdc3 1353 "base_addr %p\n", card, channel, card->base_addr);
1da177e4 1354#endif
9fa1b3b1 1355 spin_lock_irqsave(&card->card_lock, flags);
1da177e4 1356
f0eefdc3 1357 cy_writel(&ch_ctrl->op_mode, C_CH_ENABLE);
1da177e4
LT		 1358#ifdef Z_WAKE
1359#ifdef CONFIG_CYZ_INTR
f0eefdc3 1360 cy_writel(&ch_ctrl->intr_enable,
02f1175c
JS		 1361 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1362 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
1da177e4 1363#else
f0eefdc3 1364 cy_writel(&ch_ctrl->intr_enable,
02f1175c
JS		 1365 C_IN_IOCTLW | C_IN_MDCD);
1366#endif /* CONFIG_CYZ_INTR */
1da177e4
LT		 1367#else
1368#ifdef CONFIG_CYZ_INTR
f0eefdc3 1369 cy_writel(&ch_ctrl->intr_enable,
02f1175c
JS		 1370 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1371 C_IN_RXNNDT | C_IN_MDCD);
1da177e4 1372#else
f0eefdc3 1373 cy_writel(&ch_ctrl->intr_enable, C_IN_MDCD);
02f1175c
JS		 1374#endif /* CONFIG_CYZ_INTR */
1375#endif /* Z_WAKE */
1376
875b206b 1377 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
02f1175c 1378 if (retval != 0) {
21719191
JS		 1379 printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
1380 "%x\n", info->line, retval);
02f1175c 1381 }
1da177e4 1382
02f1175c 1383 /* Flush RX buffers before raising DTR and RTS */
875b206b 1384 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
02f1175c 1385 if (retval != 0) {
21719191
JS		 1386 printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
1387 "%x\n", info->line, retval);
02f1175c 1388 }
1da177e4 1389
02f1175c
JS		 1390 /* set timeout !!! */
1391 /* set RTS and DTR !!! */
4d768200 1392 tty_port_raise_dtr_rts(&info->port);
1da177e4 1393
02f1175c 1394 /* enable send, recv, modem !!! */
cc7fdf49 1395 }
02f1175c 1396
cc7fdf49 1397 info->port.flags |= ASYNC_INITIALIZED;
1da177e4 1398
cc7fdf49
JS		 1399 clear_bit(TTY_IO_ERROR, &tty->flags);
1400 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1401 info->breakon = info->breakoff = 0;
1402 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
1403 info->idle_stats.in_use =
1404 info->idle_stats.recv_idle =
1405 info->idle_stats.xmit_idle = jiffies;
1406
1407 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4
LT		 1408
1409#ifdef CY_DEBUG_OPEN
21719191 1410 printk(KERN_DEBUG "cyc startup done\n");
1da177e4
LT		 1411#endif
1412 return 0;
1413
1414errout:
9fa1b3b1 1415 spin_unlock_irqrestore(&card->card_lock, flags);
cc7fdf49 1416 free_page(page);
1da177e4 1417 return retval;
02f1175c 1418} /* startup */
1da177e4 1419
02f1175c 1420static void start_xmit(struct cyclades_port *info)
1da177e4 1421{
3aeea5b9 1422 struct cyclades_card *card = info->card;
02f1175c 1423 unsigned long flags;
3aeea5b9 1424 int channel = info->line - card->first_line;
1da177e4 1425
2693f485 1426 if (!cy_is_Z(card)) {
9fa1b3b1 1427 spin_lock_irqsave(&card->card_lock, flags);
3aeea5b9
JS		 1428 cyy_writeb(info, CyCAR, channel & 0x03);
1429 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyTxRdy);
9fa1b3b1 1430 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 1431 } else {
1da177e4 1432#ifdef CONFIG_CYZ_INTR
02f1175c 1433 int retval;
1da177e4 1434
9fa1b3b1 1435 spin_lock_irqsave(&card->card_lock, flags);
875b206b 1436 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
02f1175c 1437 if (retval != 0) {
21719191
JS		 1438 printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
1439 "%x\n", info->line, retval);
02f1175c 1440 }
9fa1b3b1 1441 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 1442#else /* CONFIG_CYZ_INTR */
1443 /* Don't have to do anything at this time */
1444#endif /* CONFIG_CYZ_INTR */
1445 }
1446} /* start_xmit */
1da177e4
LT		 1447
1448/*
1449 * This routine shuts down a serial port; interrupts are disabled,
1450 * and DTR is dropped if the hangup on close termio flag is on.
1451 */
d13549f8 1452static void cy_shutdown(struct cyclades_port *info, struct tty_struct *tty)
1da177e4 1453{
875b206b 1454 struct cyclades_card *card;
02f1175c 1455 unsigned long flags;
3aeea5b9 1456 int channel;
02f1175c 1457
77451e53 1458 if (!(info->port.flags & ASYNC_INITIALIZED))
02f1175c 1459 return;
02f1175c
JS		 1460
1461 card = info->card;
875b206b 1462 channel = info->line - card->first_line;
2693f485 1463 if (!cy_is_Z(card)) {
9fa1b3b1 1464 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 1465
1466 /* Clear delta_msr_wait queue to avoid mem leaks. */
1467 wake_up_interruptible(&info->delta_msr_wait);
1da177e4 1468
77451e53 1469 if (info->port.xmit_buf) {
02f1175c 1470 unsigned char *temp;
77451e53
AC		 1471 temp = info->port.xmit_buf;
1472 info->port.xmit_buf = NULL;
02f1175c
JS		 1473 free_page((unsigned long)temp);
1474 }
4d768200
JS		 1475 if (tty->termios->c_cflag & HUPCL)
1476 cyy_change_rts_dtr(info, 0, TIOCM_RTS | TIOCM_DTR);
1477
3aeea5b9 1478 cyy_issue_cmd(info, CyCHAN_CTL | CyDIS_RCVR);
02f1175c
JS		 1479 /* it may be appropriate to clear _XMIT at
1480 some later date (after testing)!!! */
1481
d13549f8 1482 set_bit(TTY_IO_ERROR, &tty->flags);
77451e53 1483 info->port.flags &= ~ASYNC_INITIALIZED;
9fa1b3b1 1484 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 1485 } else {
1da177e4 1486#ifdef CY_DEBUG_OPEN
21719191 1487 printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
f0eefdc3 1488 "base_addr %p\n", card, channel, card->base_addr);
1da177e4
LT		 1489#endif
1490
2693f485 1491 if (!cyz_is_loaded(card))
02f1175c 1492 return;
1da177e4 1493
9fa1b3b1 1494 spin_lock_irqsave(&card->card_lock, flags);
1da177e4 1495
77451e53 1496 if (info->port.xmit_buf) {
02f1175c 1497 unsigned char *temp;
77451e53
AC		 1498 temp = info->port.xmit_buf;
1499 info->port.xmit_buf = NULL;
02f1175c 1500 free_page((unsigned long)temp);
1da177e4 1501 }
02f1175c 1502
4d768200
JS		 1503 if (tty->termios->c_cflag & HUPCL)
1504 tty_port_lower_dtr_rts(&info->port);
1da177e4 1505
d13549f8 1506 set_bit(TTY_IO_ERROR, &tty->flags);
77451e53 1507 info->port.flags &= ~ASYNC_INITIALIZED;
02f1175c 1508
9fa1b3b1 1509 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 1510 }
1da177e4
LT		 1511
1512#ifdef CY_DEBUG_OPEN
21719191 1513 printk(KERN_DEBUG "cyc shutdown done\n");
1da177e4 1514#endif
02f1175c 1515} /* shutdown */
1da177e4
LT		 1516
1517/*
1518 * ------------------------------------------------------------
1519 * cy_open() and friends
1520 * ------------------------------------------------------------
1521 */
1522
1da177e4
LT		 1523/*
1524 * This routine is called whenever a serial port is opened. It
1525 * performs the serial-specific initialization for the tty structure.
1526 */
02f1175c 1527static int cy_open(struct tty_struct *tty, struct file *filp)
1da177e4 1528{
02f1175c 1529 struct cyclades_port *info;
65f76a82
JS		 1530 unsigned int i, line;
1531 int retval;
1da177e4 1532
02f1175c 1533 line = tty->index;
15ed6cc0 1534 if (tty->index < 0 || NR_PORTS <= line)
02f1175c 1535 return -ENODEV;
15ed6cc0 1536
dd025c0c
JS		 1537 for (i = 0; i < NR_CARDS; i++)
1538 if (line < cy_card[i].first_line + cy_card[i].nports &&
1539 line >= cy_card[i].first_line)
1540 break;
1541 if (i >= NR_CARDS)
1542 return -ENODEV;
1543 info = &cy_card[i].ports[line - cy_card[i].first_line];
15ed6cc0 1544 if (info->line < 0)
02f1175c 1545 return -ENODEV;
1da177e4 1546
02f1175c
JS		 1547 /* If the card's firmware hasn't been loaded,
1548 treat it as absent from the system. This
1549 will make the user pay attention.
1550 */
2693f485 1551 if (cy_is_Z(info->card)) {
875b206b 1552 struct cyclades_card *cinfo = info->card;
02f1175c
JS		 1553 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
1554
2693f485
JS		 1555 if (!cyz_is_loaded(cinfo)) {
1556 if (cinfo->hw_ver == ZE_V1 && cyz_fpga_loaded(cinfo) &&
101b8159
JS		 1557 readl(&firm_id->signature) ==
1558 ZFIRM_HLT) {
21719191
JS		 1559 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
1560 "need an external power supply for "
1561 "this number of ports.\nFirmware "
1562 "halted.\n");
02f1175c 1563 } else {
21719191
JS		 1564 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
1565 "yet loaded\n");
02f1175c
JS		 1566 }
1567 return -ENODEV;
1568 }
1569#ifdef CONFIG_CYZ_INTR
1570 else {
1571 /* In case this Z board is operating in interrupt mode, its
1572 interrupts should be enabled as soon as the first open
1573 happens to one of its ports. */
1574 if (!cinfo->intr_enabled) {
97e87f8e 1575 u16 intr;
02f1175c 1576
02f1175c 1577 /* Enable interrupts on the PLX chip */
97e87f8e
JS		 1578 intr = readw(&cinfo->ctl_addr.p9060->
1579 intr_ctrl_stat) | 0x0900;
1580 cy_writew(&cinfo->ctl_addr.p9060->
1581 intr_ctrl_stat, intr);
02f1175c
JS		 1582 /* Enable interrupts on the FW */
1583 retval = cyz_issue_cmd(cinfo, 0,
1584 C_CM_IRQ_ENBL, 0L);
1585 if (retval != 0) {
21719191
JS		 1586 printk(KERN_ERR "cyc:IRQ enable retval "
1587 "was %x\n", retval);
02f1175c 1588 }
02f1175c
JS		 1589 cinfo->intr_enabled = 1;
1590 }
1da177e4 1591 }
02f1175c
JS		 1592#endif /* CONFIG_CYZ_INTR */
1593 /* Make sure this Z port really exists in hardware */
1594 if (info->line > (cinfo->first_line + cinfo->nports - 1))
1595 return -ENODEV;
1da177e4 1596 }
1da177e4 1597#ifdef CY_DEBUG_OTHER
21719191 1598 printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
1da177e4 1599#endif
02f1175c 1600 tty->driver_data = info;
15ed6cc0 1601 if (serial_paranoia_check(info, tty->name, "cy_open"))
02f1175c 1602 return -ENODEV;
15ed6cc0 1603
1da177e4 1604#ifdef CY_DEBUG_OPEN
21719191 1605 printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
77451e53 1606 info->port.count);
1da177e4 1607#endif
77451e53 1608 info->port.count++;
1da177e4 1609#ifdef CY_DEBUG_COUNT
21719191 1610 printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
77451e53 1611 current->pid, info->port.count);
1da177e4 1612#endif
1da177e4 1613
02f1175c
JS		 1614 /*
1615 * If the port is the middle of closing, bail out now
1616 */
77451e53
AC		 1617 if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) {
1618 wait_event_interruptible(info->port.close_wait,
1619 !(info->port.flags & ASYNC_CLOSING));
1620 return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
02f1175c 1621 }
1da177e4 1622
02f1175c
JS		 1623 /*
1624 * Start up serial port
1625 */
d13549f8 1626 retval = cy_startup(info, tty);
15ed6cc0 1627 if (retval)
02f1175c 1628 return retval;
1da177e4 1629
f0737579 1630 retval = tty_port_block_til_ready(&info->port, tty, filp);
02f1175c 1631 if (retval) {
1da177e4 1632#ifdef CY_DEBUG_OPEN
21719191
JS		 1633 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
1634 "with %d\n", retval);
1da177e4 1635#endif
02f1175c
JS		 1636 return retval;
1637 }
1da177e4 1638
02f1175c 1639 info->throttle = 0;
d13549f8 1640 tty_port_tty_set(&info->port, tty);
1da177e4 1641
02f1175c 1642#ifdef CY_DEBUG_OPEN
21719191 1643 printk(KERN_DEBUG "cyc:cy_open done\n");
02f1175c
JS		 1644#endif
1645 return 0;
1646} /* cy_open */
1da177e4
LT		 1647
1648/*
1649 * cy_wait_until_sent() --- wait until the transmitter is empty
1650 */
02f1175c 1651static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
1da177e4 1652{
875b206b 1653 struct cyclades_card *card;
cab9bdd1 1654 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 1655 unsigned long orig_jiffies;
1656 int char_time;
1657
1658 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
1659 return;
1660
1661 if (info->xmit_fifo_size == 0)
1662 return; /* Just in case.... */
1da177e4 1663
02f1175c 1664 orig_jiffies = jiffies;
978e595f 1665 lock_kernel();
02f1175c
JS		 1666 /*
1667 * Set the check interval to be 1/5 of the estimated time to
1668 * send a single character, and make it at least 1. The check
1669 * interval should also be less than the timeout.
1670 *
1671 * Note: we have to use pretty tight timings here to satisfy
1672 * the NIST-PCTS.
1673 */
1674 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1675 char_time = char_time / 5;
1676 if (char_time <= 0)
1677 char_time = 1;
1678 if (timeout < 0)
1679 timeout = 0;
1680 if (timeout)
1681 char_time = min(char_time, timeout);
1682 /*
1683 * If the transmitter hasn't cleared in twice the approximate
1684 * amount of time to send the entire FIFO, it probably won't
1685 * ever clear. This assumes the UART isn't doing flow
1686 * control, which is currently the case. Hence, if it ever
1687 * takes longer than info->timeout, this is probably due to a
1688 * UART bug of some kind. So, we clamp the timeout parameter at
1689 * 2*info->timeout.
1690 */
1691 if (!timeout || timeout > 2 * info->timeout)
1692 timeout = 2 * info->timeout;
1da177e4 1693#ifdef CY_DEBUG_WAIT_UNTIL_SENT
21719191
JS		 1694 printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
1695 timeout, char_time, jiffies);
1da177e4 1696#endif
02f1175c 1697 card = info->card;
2693f485 1698 if (!cy_is_Z(card)) {
3aeea5b9 1699 while (cyy_readb(info, CySRER) & CyTxRdy) {
1da177e4 1700#ifdef CY_DEBUG_WAIT_UNTIL_SENT
21719191 1701 printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
1da177e4 1702#endif
02f1175c
JS		 1703 if (msleep_interruptible(jiffies_to_msecs(char_time)))
1704 break;
1705 if (timeout && time_after(jiffies, orig_jiffies +
1706 timeout))
1707 break;
1708 }
1da177e4 1709 }
02f1175c
JS		 1710 /* Run one more char cycle */
1711 msleep_interruptible(jiffies_to_msecs(char_time * 5));
978e595f 1712 unlock_kernel();
1da177e4 1713#ifdef CY_DEBUG_WAIT_UNTIL_SENT
21719191 1714 printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
1da177e4
LT		 1715#endif
1716}
1717
978e595f
AC		 1718static void cy_flush_buffer(struct tty_struct *tty)
1719{
1720 struct cyclades_port *info = tty->driver_data;
1721 struct cyclades_card *card;
1722 int channel, retval;
1723 unsigned long flags;
1724
1725#ifdef CY_DEBUG_IO
1726 printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
1727#endif
1728
1729 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
1730 return;
1731
1732 card = info->card;
1733 channel = info->line - card->first_line;
1734
1735 spin_lock_irqsave(&card->card_lock, flags);
1736 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1737 spin_unlock_irqrestore(&card->card_lock, flags);
1738
2693f485 1739 if (cy_is_Z(card)) { /* If it is a Z card, flush the on-board
978e595f
AC		 1740 buffers as well */
1741 spin_lock_irqsave(&card->card_lock, flags);
1742 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
1743 if (retval != 0) {
1744 printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
1745 "was %x\n", info->line, retval);
1746 }
1747 spin_unlock_irqrestore(&card->card_lock, flags);
1748 }
1749 tty_wakeup(tty);
1750} /* cy_flush_buffer */
1751
1752
1da177e4
LT		 1753/*
1754 * This routine is called when a particular tty device is closed.
1755 */
02f1175c 1756static void cy_close(struct tty_struct *tty, struct file *filp)
1da177e4 1757{
cab9bdd1 1758 struct cyclades_port *info = tty->driver_data;
9fa1b3b1 1759 struct cyclades_card *card;
02f1175c 1760 unsigned long flags;
3aeea5b9 1761 int channel;
1da177e4 1762
15ed6cc0 1763 if (!info || serial_paranoia_check(info, tty->name, "cy_close"))
02f1175c 1764 return;
1da177e4 1765
9fa1b3b1
JS		 1766 card = info->card;
1767
23342262 1768 if (!tty_port_close_start(&info->port, tty, filp))
02f1175c 1769 return;
15ed6cc0 1770
3aeea5b9 1771 channel = info->line - card->first_line;
9fa1b3b1 1772 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 1773
2693f485 1774 if (!cy_is_Z(card)) {
02f1175c 1775 /* Stop accepting input */
3aeea5b9
JS		 1776 cyy_writeb(info, CyCAR, channel & 0x03);
1777 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyRxData);
77451e53 1778 if (info->port.flags & ASYNC_INITIALIZED) {
15ed6cc0
AC		 1779 /* Waiting for on-board buffers to be empty before
1780 closing the port */
9fa1b3b1 1781 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 1782 cy_wait_until_sent(tty, info->timeout);
9fa1b3b1 1783 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 1784 }
1785 } else {
1786#ifdef Z_WAKE
15ed6cc0
AC		 1787 /* Waiting for on-board buffers to be empty before closing
1788 the port */
f0eefdc3 1789 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
02f1175c
JS		 1790 int retval;
1791
f0eefdc3 1792 if (readl(&ch_ctrl->flow_status) != C_FS_TXIDLE) {
9fa1b3b1 1793 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
02f1175c 1794 if (retval != 0) {
21719191
JS		 1795 printk(KERN_DEBUG "cyc:cy_close retval on "
1796 "ttyC%d was %x\n", info->line, retval);
02f1175c 1797 }
9fa1b3b1 1798 spin_unlock_irqrestore(&card->card_lock, flags);
2c7fea99 1799 wait_for_completion_interruptible(&info->shutdown_wait);
9fa1b3b1 1800 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 1801 }
1da177e4 1802#endif
02f1175c
JS		 1803 }
1804
9fa1b3b1 1805 spin_unlock_irqrestore(&card->card_lock, flags);
d13549f8 1806 cy_shutdown(info, tty);
978e595f 1807 cy_flush_buffer(tty);
02f1175c 1808
d13549f8 1809 tty_port_tty_set(&info->port, NULL);
1da177e4 1810
23342262 1811 tty_port_close_end(&info->port, tty);
02f1175c 1812} /* cy_close */
1da177e4
LT		 1813
1814/* This routine gets called when tty_write has put something into
1815 * the write_queue. The characters may come from user space or
1816 * kernel space.
1817 *
1818 * This routine will return the number of characters actually
1819 * accepted for writing.
1820 *
1821 * If the port is not already transmitting stuff, start it off by
1822 * enabling interrupts. The interrupt service routine will then
1823 * ensure that the characters are sent.
1824 * If the port is already active, there is no need to kick it.
1825 *
1826 */
02f1175c 1827static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
1da177e4 1828{
cab9bdd1 1829 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 1830 unsigned long flags;
1831 int c, ret = 0;
1da177e4
LT		 1832
1833#ifdef CY_DEBUG_IO
21719191 1834 printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
1da177e4
LT		 1835#endif
1836
15ed6cc0 1837 if (serial_paranoia_check(info, tty->name, "cy_write"))
02f1175c 1838 return 0;
1da177e4 1839
77451e53 1840 if (!info->port.xmit_buf)
02f1175c 1841 return 0;
1da177e4 1842
9fa1b3b1 1843 spin_lock_irqsave(&info->card->card_lock, flags);
02f1175c 1844 while (1) {
1a4e2351
HH		 1845 c = min(count, (int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1));
1846 c = min(c, (int)(SERIAL_XMIT_SIZE - info->xmit_head));
02f1175c
JS		 1847
1848 if (c <= 0)
1849 break;
1850
77451e53 1851 memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
02f1175c
JS		 1852 info->xmit_head = (info->xmit_head + c) &
1853 (SERIAL_XMIT_SIZE - 1);
1854 info->xmit_cnt += c;
1855 buf += c;
1856 count -= c;
1857 ret += c;
1858 }
9fa1b3b1 1859 spin_unlock_irqrestore(&info->card->card_lock, flags);
02f1175c
JS		 1860
1861 info->idle_stats.xmit_bytes += ret;
1862 info->idle_stats.xmit_idle = jiffies;
1863
15ed6cc0 1864 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped)
02f1175c 1865 start_xmit(info);
15ed6cc0 1866
02f1175c
JS		 1867 return ret;
1868} /* cy_write */
1da177e4
LT		 1869
1870/*
1871 * This routine is called by the kernel to write a single
1872 * character to the tty device. If the kernel uses this routine,
1873 * it must call the flush_chars() routine (if defined) when it is
1874 * done stuffing characters into the driver. If there is no room
1875 * in the queue, the character is ignored.
1876 */
76b25a55 1877static int cy_put_char(struct tty_struct *tty, unsigned char ch)
1da177e4 1878{
cab9bdd1 1879 struct cyclades_port *info = tty->driver_data;
02f1175c 1880 unsigned long flags;
1da177e4
LT		 1881
1882#ifdef CY_DEBUG_IO
21719191 1883 printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
1da177e4
LT		 1884#endif
1885
02f1175c 1886 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
76b25a55 1887 return 0;
1da177e4 1888
77451e53 1889 if (!info->port.xmit_buf)
76b25a55 1890 return 0;
1da177e4 1891
9fa1b3b1 1892 spin_lock_irqsave(&info->card->card_lock, flags);
90cc3018 1893 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
9fa1b3b1 1894 spin_unlock_irqrestore(&info->card->card_lock, flags);
76b25a55 1895 return 0;
02f1175c 1896 }
1da177e4 1897
77451e53 1898 info->port.xmit_buf[info->xmit_head++] = ch;
02f1175c
JS		 1899 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1900 info->xmit_cnt++;
1da177e4
LT		 1901 info->idle_stats.xmit_bytes++;
1902 info->idle_stats.xmit_idle = jiffies;
9fa1b3b1 1903 spin_unlock_irqrestore(&info->card->card_lock, flags);
76b25a55 1904 return 1;
02f1175c 1905} /* cy_put_char */
1da177e4
LT		 1906
1907/*
1908 * This routine is called by the kernel after it has written a
15ed6cc0 1909 * series of characters to the tty device using put_char().
1da177e4 1910 */
02f1175c 1911static void cy_flush_chars(struct tty_struct *tty)
1da177e4 1912{
cab9bdd1 1913 struct cyclades_port *info = tty->driver_data;
02f1175c 1914
1da177e4 1915#ifdef CY_DEBUG_IO
21719191 1916 printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
1da177e4
LT		 1917#endif
1918
02f1175c
JS		 1919 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
1920 return;
1da177e4 1921
02f1175c 1922 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
77451e53 1923 !info->port.xmit_buf)
02f1175c 1924 return;
1da177e4 1925
02f1175c
JS		 1926 start_xmit(info);
1927} /* cy_flush_chars */
1da177e4
LT		 1928
1929/*
1930 * This routine returns the numbers of characters the tty driver
1931 * will accept for queuing to be written. This number is subject
1932 * to change as output buffers get emptied, or if the output flow
1933 * control is activated.
1934 */
02f1175c 1935static int cy_write_room(struct tty_struct *tty)
1da177e4 1936{
cab9bdd1 1937 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 1938 int ret;
1939
1da177e4 1940#ifdef CY_DEBUG_IO
21719191 1941 printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
1da177e4
LT		 1942#endif
1943
02f1175c
JS		 1944 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
1945 return 0;
1946 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1947 if (ret < 0)
1948 ret = 0;
1949 return ret;
1950} /* cy_write_room */
1da177e4 1951
02f1175c 1952static int cy_chars_in_buffer(struct tty_struct *tty)
1da177e4 1953{
cab9bdd1 1954 struct cyclades_port *info = tty->driver_data;
1da177e4 1955
02f1175c
JS		 1956 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
1957 return 0;
1958
1da177e4 1959#ifdef Z_EXT_CHARS_IN_BUFFER
f0eefdc3 1960 if (!cy_is_Z(info->card)) {
02f1175c 1961#endif /* Z_EXT_CHARS_IN_BUFFER */
1da177e4 1962#ifdef CY_DEBUG_IO
21719191
JS		 1963 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
1964 info->line, info->xmit_cnt);
1da177e4 1965#endif
02f1175c 1966 return info->xmit_cnt;
1da177e4 1967#ifdef Z_EXT_CHARS_IN_BUFFER
02f1175c 1968 } else {
f0eefdc3 1969 struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
02f1175c 1970 int char_count;
ad39c300 1971 __u32 tx_put, tx_get, tx_bufsize;
02f1175c 1972
978e595f 1973 lock_kernel();
db05c3b1
JS		 1974 tx_get = readl(&buf_ctrl->tx_get);
1975 tx_put = readl(&buf_ctrl->tx_put);
1976 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
02f1175c
JS		 1977 if (tx_put >= tx_get)
1978 char_count = tx_put - tx_get;
1979 else
1980 char_count = tx_put - tx_get + tx_bufsize;
1da177e4 1981#ifdef CY_DEBUG_IO
21719191
JS		 1982 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
1983 info->line, info->xmit_cnt + char_count);
1da177e4 1984#endif
978e595f 1985 unlock_kernel();
096dcfce 1986 return info->xmit_cnt + char_count;
02f1175c
JS		 1987 }
1988#endif /* Z_EXT_CHARS_IN_BUFFER */
1989} /* cy_chars_in_buffer */
1da177e4
LT		 1990
1991/*
1992 * ------------------------------------------------------------
1993 * cy_ioctl() and friends
1994 * ------------------------------------------------------------
1995 */
1996
1a86b5e3 1997static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
1da177e4 1998{
02f1175c 1999 int co, co_val, bpr;
1a86b5e3 2000 __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
02f1175c 2001 25000000);
1da177e4 2002
02f1175c
JS		 2003 if (baud == 0) {
2004 info->tbpr = info->tco = info->rbpr = info->rco = 0;
2005 return;
2006 }
1da177e4 2007
02f1175c
JS		 2008 /* determine which prescaler to use */
2009 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
2010 if (cy_clock / co_val / baud > 63)
2011 break;
2012 }
1da177e4 2013
02f1175c
JS		 2014 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
2015 if (bpr > 255)
2016 bpr = 255;
1da177e4 2017
02f1175c
JS		 2018 info->tbpr = info->rbpr = bpr;
2019 info->tco = info->rco = co;
1da177e4
LT		 2020}
2021
2022/*
2023 * This routine finds or computes the various line characteristics.
2024 * It used to be called config_setup
2025 */
d13549f8 2026static void cy_set_line_char(struct cyclades_port *info, struct tty_struct *tty)
1da177e4 2027{
875b206b 2028 struct cyclades_card *card;
02f1175c 2029 unsigned long flags;
3aeea5b9 2030 int channel;
02f1175c 2031 unsigned cflag, iflag;
02f1175c
JS		 2032 int baud, baud_rate = 0;
2033 int i;
2034
d13549f8 2035 if (!tty->termios) /* XXX can this happen at all? */
02f1175c 2036 return;
15ed6cc0
AC		 2037
2038 if (info->line == -1)
02f1175c 2039 return;
15ed6cc0 2040
d13549f8
JS		 2041 cflag = tty->termios->c_cflag;
2042 iflag = tty->termios->c_iflag;
1da177e4 2043
02f1175c
JS		 2044 /*
2045 * Set up the tty->alt_speed kludge
2046 */
d13549f8
JS		 2047 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
2048 tty->alt_speed = 57600;
2049 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
2050 tty->alt_speed = 115200;
2051 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
2052 tty->alt_speed = 230400;
2053 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
2054 tty->alt_speed = 460800;
02f1175c
JS		 2055
2056 card = info->card;
875b206b 2057 channel = info->line - card->first_line;
02f1175c 2058
2693f485 2059 if (!cy_is_Z(card)) {
46fb7825
JS		 2060 u32 cflags;
2061
02f1175c 2062 /* baud rate */
d13549f8 2063 baud = tty_get_baud_rate(tty);
77451e53 2064 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
02f1175c
JS		 2065 ASYNC_SPD_CUST) {
2066 if (info->custom_divisor)
2067 baud_rate = info->baud / info->custom_divisor;
2068 else
2069 baud_rate = info->baud;
2070 } else if (baud > CD1400_MAX_SPEED) {
2071 baud = CD1400_MAX_SPEED;
2072 }
2073 /* find the baud index */
2074 for (i = 0; i < 20; i++) {
15ed6cc0 2075 if (baud == baud_table[i])
02f1175c 2076 break;
02f1175c 2077 }
15ed6cc0 2078 if (i == 20)
02f1175c 2079 i = 19; /* CD1400_MAX_SPEED */
02f1175c 2080
77451e53 2081 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
02f1175c
JS		 2082 ASYNC_SPD_CUST) {
2083 cyy_baud_calc(info, baud_rate);
2084 } else {
2085 if (info->chip_rev >= CD1400_REV_J) {
2086 /* It is a CD1400 rev. J or later */
2087 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
2088 info->tco = baud_co_60[i]; /* Tx CO */
2089 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
2090 info->rco = baud_co_60[i]; /* Rx CO */
2091 } else {
2092 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
2093 info->tco = baud_co_25[i]; /* Tx CO */
2094 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
2095 info->rco = baud_co_25[i]; /* Rx CO */
2096 }
2097 }
2098 if (baud_table[i] == 134) {
2099 /* get it right for 134.5 baud */
2100 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
2101 2;
77451e53 2102 } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
02f1175c
JS		 2103 ASYNC_SPD_CUST) {
2104 info->timeout = (info->xmit_fifo_size * HZ * 15 /
2105 baud_rate) + 2;
2106 } else if (baud_table[i]) {
2107 info->timeout = (info->xmit_fifo_size * HZ * 15 /
2108 baud_table[i]) + 2;
2109 /* this needs to be propagated into the card info */
2110 } else {
2111 info->timeout = 0;
2112 }
2113 /* By tradition (is it a standard?) a baud rate of zero
2114 implies the line should be/has been closed. A bit
2115 later in this routine such a test is performed. */
2116
2117 /* byte size and parity */
2118 info->cor5 = 0;
2119 info->cor4 = 0;
2120 /* receive threshold */
2121 info->cor3 = (info->default_threshold ?
2122 info->default_threshold : baud_cor3[i]);
2123 info->cor2 = CyETC;
2124 switch (cflag & CSIZE) {
2125 case CS5:
2126 info->cor1 = Cy_5_BITS;
2127 break;
2128 case CS6:
2129 info->cor1 = Cy_6_BITS;
2130 break;
2131 case CS7:
2132 info->cor1 = Cy_7_BITS;
2133 break;
2134 case CS8:
2135 info->cor1 = Cy_8_BITS;
2136 break;
2137 }
15ed6cc0 2138 if (cflag & CSTOPB)
02f1175c 2139 info->cor1 |= Cy_2_STOP;
15ed6cc0 2140
02f1175c 2141 if (cflag & PARENB) {
15ed6cc0 2142 if (cflag & PARODD)
02f1175c 2143 info->cor1 |= CyPARITY_O;
15ed6cc0 2144 else
02f1175c 2145 info->cor1 |= CyPARITY_E;
15ed6cc0 2146 } else
02f1175c 2147 info->cor1 |= CyPARITY_NONE;
02f1175c
JS		 2148
2149 /* CTS flow control flag */
2150 if (cflag & CRTSCTS) {
77451e53 2151 info->port.flags |= ASYNC_CTS_FLOW;
02f1175c
JS		 2152 info->cor2 |= CyCtsAE;
2153 } else {
77451e53 2154 info->port.flags &= ~ASYNC_CTS_FLOW;
02f1175c
JS		 2155 info->cor2 &= ~CyCtsAE;
2156 }
2157 if (cflag & CLOCAL)
77451e53 2158 info->port.flags &= ~ASYNC_CHECK_CD;
02f1175c 2159 else
77451e53 2160 info->port.flags |= ASYNC_CHECK_CD;
1da177e4
LT		 2161
2162 /***********************************************
2163 The hardware option, CyRtsAO, presents RTS when
2164 the chip has characters to send. Since most modems
2165 use RTS as reverse (inbound) flow control, this
2166 option is not used. If inbound flow control is
2167 necessary, DTR can be programmed to provide the
2168 appropriate signals for use with a non-standard
2169 cable. Contact Marcio Saito for details.
2170 ***********************************************/
2171
02f1175c 2172 channel &= 0x03;
1da177e4 2173
9fa1b3b1 2174 spin_lock_irqsave(&card->card_lock, flags);
3aeea5b9 2175 cyy_writeb(info, CyCAR, channel);
02f1175c
JS		 2176
2177 /* tx and rx baud rate */
2178
3aeea5b9
JS		 2179 cyy_writeb(info, CyTCOR, info->tco);
2180 cyy_writeb(info, CyTBPR, info->tbpr);
2181 cyy_writeb(info, CyRCOR, info->rco);
2182 cyy_writeb(info, CyRBPR, info->rbpr);
02f1175c
JS		 2183
2184 /* set line characteristics according configuration */
2185
3aeea5b9
JS		 2186 cyy_writeb(info, CySCHR1, START_CHAR(tty));
2187 cyy_writeb(info, CySCHR2, STOP_CHAR(tty));
2188 cyy_writeb(info, CyCOR1, info->cor1);
2189 cyy_writeb(info, CyCOR2, info->cor2);
2190 cyy_writeb(info, CyCOR3, info->cor3);
2191 cyy_writeb(info, CyCOR4, info->cor4);
2192 cyy_writeb(info, CyCOR5, info->cor5);
02f1175c 2193
3aeea5b9
JS		 2194 cyy_issue_cmd(info, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
2195 CyCOR3ch);
02f1175c 2196
15ed6cc0 2197 /* !!! Is this needed? */
3aeea5b9
JS		 2198 cyy_writeb(info, CyCAR, channel);
2199 cyy_writeb(info, CyRTPR,
02f1175c
JS		 2200 (info->default_timeout ? info->default_timeout : 0x02));
2201 /* 10ms rx timeout */
2202
46fb7825
JS		 2203 cflags = CyCTS;
2204 if (!C_CLOCAL(tty))
2205 cflags |= CyDSR | CyRI | CyDCD;
2206 /* without modem intr */
2207 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyMdmCh);
2208 /* act on 1->0 modem transitions */
2209 if ((cflag & CRTSCTS) && info->rflow)
2210 cyy_writeb(info, CyMCOR1, cflags | rflow_thr[i]);
2211 else
2212 cyy_writeb(info, CyMCOR1, cflags);
2213 /* act on 0->1 modem transitions */
2214 cyy_writeb(info, CyMCOR2, cflags);
02f1175c 2215
4d768200
JS		 2216 if (i == 0) /* baud rate is zero, turn off line */
2217 cyy_change_rts_dtr(info, 0, TIOCM_DTR);
2218 else
2219 cyy_change_rts_dtr(info, TIOCM_DTR, 0);
1da177e4 2220
d13549f8 2221 clear_bit(TTY_IO_ERROR, &tty->flags);
9fa1b3b1 2222 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 2223
1da177e4 2224 } else {
f0eefdc3 2225 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
1a86b5e3 2226 __u32 sw_flow;
02f1175c 2227 int retval;
1da177e4 2228
2693f485 2229 if (!cyz_is_loaded(card))
02f1175c 2230 return;
1da177e4 2231
02f1175c 2232 /* baud rate */
d13549f8 2233 baud = tty_get_baud_rate(tty);
77451e53 2234 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
02f1175c
JS		 2235 ASYNC_SPD_CUST) {
2236 if (info->custom_divisor)
2237 baud_rate = info->baud / info->custom_divisor;
2238 else
2239 baud_rate = info->baud;
2240 } else if (baud > CYZ_MAX_SPEED) {
2241 baud = CYZ_MAX_SPEED;
2242 }
2243 cy_writel(&ch_ctrl->comm_baud, baud);
2244
2245 if (baud == 134) {
2246 /* get it right for 134.5 baud */
2247 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
2248 2;
77451e53 2249 } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
02f1175c
JS		 2250 ASYNC_SPD_CUST) {
2251 info->timeout = (info->xmit_fifo_size * HZ * 15 /
2252 baud_rate) + 2;
2253 } else if (baud) {
2254 info->timeout = (info->xmit_fifo_size * HZ * 15 /
2255 baud) + 2;
2256 /* this needs to be propagated into the card info */
2257 } else {
2258 info->timeout = 0;
2259 }
1da177e4 2260
02f1175c
JS		 2261 /* byte size and parity */
2262 switch (cflag & CSIZE) {
2263 case CS5:
2264 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
2265 break;
2266 case CS6:
2267 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
2268 break;
2269 case CS7:
2270 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
2271 break;
2272 case CS8:
2273 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
2274 break;
2275 }
2276 if (cflag & CSTOPB) {
2277 cy_writel(&ch_ctrl->comm_data_l,
db05c3b1 2278 readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
02f1175c
JS		 2279 } else {
2280 cy_writel(&ch_ctrl->comm_data_l,
db05c3b1 2281 readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
02f1175c
JS		 2282 }
2283 if (cflag & PARENB) {
15ed6cc0 2284 if (cflag & PARODD)
02f1175c 2285 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
15ed6cc0 2286 else
02f1175c 2287 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
15ed6cc0 2288 } else
02f1175c 2289 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
1da177e4 2290
02f1175c
JS		 2291 /* CTS flow control flag */
2292 if (cflag & CRTSCTS) {
2293 cy_writel(&ch_ctrl->hw_flow,
db05c3b1 2294 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
02f1175c 2295 } else {
db05c3b1
JS		 2296 cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
2297 ~(C_RS_CTS | C_RS_RTS));
02f1175c
JS		 2298 }
2299 /* As the HW flow control is done in firmware, the driver
2300 doesn't need to care about it */
77451e53 2301 info->port.flags &= ~ASYNC_CTS_FLOW;
02f1175c
JS		 2302
2303 /* XON/XOFF/XANY flow control flags */
2304 sw_flow = 0;
2305 if (iflag & IXON) {
2306 sw_flow |= C_FL_OXX;
2307 if (iflag & IXANY)
2308 sw_flow |= C_FL_OIXANY;
2309 }
2310 cy_writel(&ch_ctrl->sw_flow, sw_flow);
2311
875b206b 2312 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
02f1175c 2313 if (retval != 0) {
21719191
JS		 2314 printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
2315 "was %x\n", info->line, retval);
02f1175c
JS		 2316 }
2317
2318 /* CD sensitivity */
15ed6cc0 2319 if (cflag & CLOCAL)
77451e53 2320 info->port.flags &= ~ASYNC_CHECK_CD;
15ed6cc0 2321 else
77451e53 2322 info->port.flags |= ASYNC_CHECK_CD;
1da177e4 2323
02f1175c
JS		 2324 if (baud == 0) { /* baud rate is zero, turn off line */
2325 cy_writel(&ch_ctrl->rs_control,
db05c3b1 2326 readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
1da177e4 2327#ifdef CY_DEBUG_DTR
21719191 2328 printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
1da177e4 2329#endif
02f1175c
JS		 2330 } else {
2331 cy_writel(&ch_ctrl->rs_control,
db05c3b1 2332 readl(&ch_ctrl->rs_control) | C_RS_DTR);
1da177e4 2333#ifdef CY_DEBUG_DTR
21719191 2334 printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
1da177e4 2335#endif
02f1175c 2336 }
1da177e4 2337
15ed6cc0 2338 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
02f1175c 2339 if (retval != 0) {
21719191
JS		 2340 printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
2341 "was %x\n", info->line, retval);
02f1175c 2342 }
1da177e4 2343
d13549f8 2344 clear_bit(TTY_IO_ERROR, &tty->flags);
1da177e4 2345 }
02f1175c 2346} /* set_line_char */
1da177e4 2347
6c28181c 2348static int cy_get_serial_info(struct cyclades_port *info,
15ed6cc0 2349 struct serial_struct __user *retinfo)
1da177e4 2350{
875b206b 2351 struct cyclades_card *cinfo = info->card;
6c28181c
JS		 2352 struct serial_struct tmp = {
2353 .type = info->type,
2354 .line = info->line,
2355 .port = (info->card - cy_card) * 0x100 + info->line -
2356 cinfo->first_line,
2357 .irq = cinfo->irq,
2358 .flags = info->port.flags,
2359 .close_delay = info->port.close_delay,
2360 .closing_wait = info->port.closing_wait,
2361 .baud_base = info->baud,
2362 .custom_divisor = info->custom_divisor,
2363 .hub6 = 0, /*!!! */
2364 };
02f1175c 2365 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
6c28181c 2366}
1da177e4
LT		 2367
2368static int
d13549f8 2369cy_set_serial_info(struct cyclades_port *info, struct tty_struct *tty,
15ed6cc0 2370 struct serial_struct __user *new_info)
1da177e4 2371{
02f1175c 2372 struct serial_struct new_serial;
02f1175c
JS		 2373
2374 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2375 return -EFAULT;
02f1175c
JS		 2376
2377 if (!capable(CAP_SYS_ADMIN)) {
44b7d1b3 2378 if (new_serial.close_delay != info->port.close_delay ||
02f1175c
JS		 2379 new_serial.baud_base != info->baud ||
2380 (new_serial.flags & ASYNC_FLAGS &
2381 ~ASYNC_USR_MASK) !=
77451e53 2382 (info->port.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
02f1175c 2383 return -EPERM;
77451e53 2384 info->port.flags = (info->port.flags & ~ASYNC_USR_MASK) |
02f1175c
JS		 2385 (new_serial.flags & ASYNC_USR_MASK);
2386 info->baud = new_serial.baud_base;
2387 info->custom_divisor = new_serial.custom_divisor;
2388 goto check_and_exit;
2389 }
2390
2391 /*
2392 * OK, past this point, all the error checking has been done.
2393 * At this point, we start making changes.....
2394 */
2395
2396 info->baud = new_serial.baud_base;
2397 info->custom_divisor = new_serial.custom_divisor;
77451e53 2398 info->port.flags = (info->port.flags & ~ASYNC_FLAGS) |
02f1175c 2399 (new_serial.flags & ASYNC_FLAGS);
44b7d1b3
AC		 2400 info->port.close_delay = new_serial.close_delay * HZ / 100;
2401 info->port.closing_wait = new_serial.closing_wait * HZ / 100;
1da177e4
LT		 2402
2403check_and_exit:
77451e53 2404 if (info->port.flags & ASYNC_INITIALIZED) {
d13549f8 2405 cy_set_line_char(info, tty);
02f1175c
JS		 2406 return 0;
2407 } else {
d13549f8 2408 return cy_startup(info, tty);
02f1175c
JS		 2409 }
2410} /* set_serial_info */
1da177e4
LT		 2411
2412/*
2413 * get_lsr_info - get line status register info
2414 *
2415 * Purpose: Let user call ioctl() to get info when the UART physically
2416 * is emptied. On bus types like RS485, the transmitter must
2417 * release the bus after transmitting. This must be done when
2418 * the transmit shift register is empty, not be done when the
2419 * transmit holding register is empty. This functionality
2420 * allows an RS485 driver to be written in user space.
2421 */
15ed6cc0 2422static int get_lsr_info(struct cyclades_port *info, unsigned int __user *value)
1da177e4 2423{
3aeea5b9 2424 struct cyclades_card *card = info->card;
02f1175c
JS		 2425 unsigned int result;
2426 unsigned long flags;
3aeea5b9 2427 u8 status;
1da177e4 2428
2693f485 2429 if (!cy_is_Z(card)) {
9fa1b3b1 2430 spin_lock_irqsave(&card->card_lock, flags);
3aeea5b9 2431 status = cyy_readb(info, CySRER) & (CyTxRdy | CyTxMpty);
9fa1b3b1 2432 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2433 result = (status ? 0 : TIOCSER_TEMT);
2434 } else {
2435 /* Not supported yet */
2436 return -EINVAL;
2437 }
2438 return put_user(result, (unsigned long __user *)value);
1da177e4
LT		 2439}
2440
02f1175c 2441static int cy_tiocmget(struct tty_struct *tty, struct file *file)
1da177e4 2442{
cab9bdd1 2443 struct cyclades_port *info = tty->driver_data;
875b206b 2444 struct cyclades_card *card;
3aeea5b9 2445 int result;
02f1175c 2446
bf9d8929 2447 if (serial_paranoia_check(info, tty->name, __func__))
02f1175c 2448 return -ENODEV;
1da177e4 2449
02f1175c 2450 card = info->card;
0d348729
JS		 2451
2452 lock_kernel();
2693f485 2453 if (!cy_is_Z(card)) {
0d348729 2454 unsigned long flags;
3aeea5b9
JS		 2455 int channel = info->line - card->first_line;
2456 u8 status;
1da177e4 2457
9fa1b3b1 2458 spin_lock_irqsave(&card->card_lock, flags);
3aeea5b9
JS		 2459 cyy_writeb(info, CyCAR, channel & 0x03);
2460 status = cyy_readb(info, CyMSVR1);
2461 status |= cyy_readb(info, CyMSVR2);
9fa1b3b1 2462 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2463
2464 if (info->rtsdtr_inv) {
2465 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
2466 ((status & CyDTR) ? TIOCM_RTS : 0);
2467 } else {
2468 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
2469 ((status & CyDTR) ? TIOCM_DTR : 0);
2470 }
2471 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
2472 ((status & CyRI) ? TIOCM_RNG : 0) |
2473 ((status & CyDSR) ? TIOCM_DSR : 0) |
2474 ((status & CyCTS) ? TIOCM_CTS : 0);
1da177e4 2475 } else {
0d348729
JS		 2476 u32 lstatus;
2477
2478 if (!cyz_is_loaded(card)) {
2479 result = -ENODEV;
2480 goto end;
02f1175c 2481 }
1da177e4 2482
0d348729
JS		 2483 lstatus = readl(&info->u.cyz.ch_ctrl->rs_status);
2484 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
2485 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
2486 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
2487 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
2488 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
2489 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
02f1175c 2490 }
0d348729 2491end:
7b130c0e 2492 unlock_kernel();
02f1175c
JS		 2493 return result;
2494} /* cy_tiomget */
1da177e4
LT		 2495
2496static int
2497cy_tiocmset(struct tty_struct *tty, struct file *file,
02f1175c 2498 unsigned int set, unsigned int clear)
1da177e4 2499{
cab9bdd1 2500 struct cyclades_port *info = tty->driver_data;
875b206b 2501 struct cyclades_card *card;
02f1175c 2502 unsigned long flags;
02f1175c 2503
bf9d8929 2504 if (serial_paranoia_check(info, tty->name, __func__))
02f1175c
JS		 2505 return -ENODEV;
2506
2507 card = info->card;
2693f485 2508 if (!cy_is_Z(card)) {
4d768200
JS		 2509 spin_lock_irqsave(&card->card_lock, flags);
2510 cyy_change_rts_dtr(info, set, clear);
2511 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 2512 } else {
0d348729
JS		 2513 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
2514 int retval, channel = info->line - card->first_line;
2515 u32 rs;
2516
2517 if (!cyz_is_loaded(card))
2518 return -ENODEV;
2519
2520 spin_lock_irqsave(&card->card_lock, flags);
2521 rs = readl(&ch_ctrl->rs_control);
2522 if (set & TIOCM_RTS)
2523 rs |= C_RS_RTS;
2524 if (clear & TIOCM_RTS)
2525 rs &= ~C_RS_RTS;
2526 if (set & TIOCM_DTR) {
2527 rs |= C_RS_DTR;
1da177e4 2528#ifdef CY_DEBUG_DTR
0d348729 2529 printk(KERN_DEBUG "cyc:set_modem_info raising Z DTR\n");
1da177e4 2530#endif
0d348729
JS		 2531 }
2532 if (clear & TIOCM_DTR) {
2533 rs &= ~C_RS_DTR;
1da177e4 2534#ifdef CY_DEBUG_DTR
0d348729
JS		 2535 printk(KERN_DEBUG "cyc:set_modem_info clearing "
2536 "Z DTR\n");
1da177e4 2537#endif
02f1175c 2538 }
0d348729 2539 cy_writel(&ch_ctrl->rs_control, rs);
9fa1b3b1 2540 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
0d348729 2541 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 2542 if (retval != 0) {
21719191
JS		 2543 printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
2544 "was %x\n", info->line, retval);
02f1175c 2545 }
1da177e4 2546 }
02f1175c 2547 return 0;
0d348729 2548}
1da177e4
LT		 2549
2550/*
2551 * cy_break() --- routine which turns the break handling on or off
2552 */
9e98966c 2553static int cy_break(struct tty_struct *tty, int break_state)
1da177e4 2554{
cab9bdd1 2555 struct cyclades_port *info = tty->driver_data;
9fa1b3b1 2556 struct cyclades_card *card;
02f1175c 2557 unsigned long flags;
9e98966c 2558 int retval = 0;
1da177e4 2559
02f1175c 2560 if (serial_paranoia_check(info, tty->name, "cy_break"))
9e98966c 2561 return -EINVAL;
1da177e4 2562
9fa1b3b1
JS		 2563 card = info->card;
2564
2565 spin_lock_irqsave(&card->card_lock, flags);
2693f485 2566 if (!cy_is_Z(card)) {
02f1175c
JS		 2567 /* Let the transmit ISR take care of this (since it
2568 requires stuffing characters into the output stream).
2569 */
2570 if (break_state == -1) {
2571 if (!info->breakon) {
2572 info->breakon = 1;
2573 if (!info->xmit_cnt) {
9fa1b3b1 2574 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 2575 start_xmit(info);
9fa1b3b1 2576 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2577 }
2578 }
2579 } else {
2580 if (!info->breakoff) {
2581 info->breakoff = 1;
2582 if (!info->xmit_cnt) {
9fa1b3b1 2583 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 2584 start_xmit(info);
9fa1b3b1 2585 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2586 }
2587 }
1da177e4 2588 }
1da177e4 2589 } else {
02f1175c 2590 if (break_state == -1) {
9fa1b3b1
JS		 2591 retval = cyz_issue_cmd(card,
2592 info->line - card->first_line,
02f1175c
JS		 2593 C_CM_SET_BREAK, 0L);
2594 if (retval != 0) {
21719191
JS		 2595 printk(KERN_ERR "cyc:cy_break (set) retval on "
2596 "ttyC%d was %x\n", info->line, retval);
02f1175c
JS		 2597 }
2598 } else {
9fa1b3b1
JS		 2599 retval = cyz_issue_cmd(card,
2600 info->line - card->first_line,
02f1175c
JS		 2601 C_CM_CLR_BREAK, 0L);
2602 if (retval != 0) {
21719191
JS		 2603 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
2604 "on ttyC%d was %x\n", info->line,
2605 retval);
02f1175c 2606 }
1da177e4 2607 }
1da177e4 2608 }
9fa1b3b1 2609 spin_unlock_irqrestore(&card->card_lock, flags);
9e98966c 2610 return retval;
02f1175c 2611} /* cy_break */
1da177e4 2612
02f1175c 2613static int set_threshold(struct cyclades_port *info, unsigned long value)
1da177e4 2614{
3aeea5b9 2615 struct cyclades_card *card = info->card;
02f1175c 2616 unsigned long flags;
1da177e4 2617
2693f485 2618 if (!cy_is_Z(card)) {
02f1175c
JS		 2619 info->cor3 &= ~CyREC_FIFO;
2620 info->cor3 |= value & CyREC_FIFO;
1da177e4 2621
9fa1b3b1 2622 spin_lock_irqsave(&card->card_lock, flags);
3aeea5b9
JS		 2623 cyy_writeb(info, CyCOR3, info->cor3);
2624 cyy_issue_cmd(info, CyCOR_CHANGE | CyCOR3ch);
9fa1b3b1 2625 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2626 }
2627 return 0;
2628} /* set_threshold */
1da177e4 2629
15ed6cc0
AC		 2630static int get_threshold(struct cyclades_port *info,
2631 unsigned long __user *value)
1da177e4 2632{
3aeea5b9 2633 struct cyclades_card *card = info->card;
1da177e4 2634
2693f485 2635 if (!cy_is_Z(card)) {
3aeea5b9 2636 u8 tmp = cyy_readb(info, CyCOR3) & CyREC_FIFO;
02f1175c 2637 return put_user(tmp, value);
02f1175c 2638 }
f7429034 2639 return 0;
02f1175c 2640} /* get_threshold */
1da177e4 2641
02f1175c 2642static int set_timeout(struct cyclades_port *info, unsigned long value)
1da177e4 2643{
3aeea5b9 2644 struct cyclades_card *card = info->card;
02f1175c 2645 unsigned long flags;
1da177e4 2646
2693f485 2647 if (!cy_is_Z(card)) {
9fa1b3b1 2648 spin_lock_irqsave(&card->card_lock, flags);
3aeea5b9 2649 cyy_writeb(info, CyRTPR, value & 0xff);
9fa1b3b1 2650 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2651 }
2652 return 0;
2653} /* set_timeout */
1da177e4 2654
15ed6cc0
AC		 2655static int get_timeout(struct cyclades_port *info,
2656 unsigned long __user *value)
1da177e4 2657{
3aeea5b9 2658 struct cyclades_card *card = info->card;
1da177e4 2659
2693f485 2660 if (!cy_is_Z(card)) {
3aeea5b9 2661 u8 tmp = cyy_readb(info, CyRTPR);
02f1175c 2662 return put_user(tmp, value);
02f1175c 2663 }
f7429034 2664 return 0;
02f1175c 2665} /* get_timeout */
1da177e4 2666
6c28181c
JS		 2667static int cy_cflags_changed(struct cyclades_port *info, unsigned long arg,
2668 struct cyclades_icount *cprev)
1da177e4 2669{
6c28181c
JS		 2670 struct cyclades_icount cnow;
2671 unsigned long flags;
2672 int ret;
1da177e4 2673
6c28181c
JS		 2674 spin_lock_irqsave(&info->card->card_lock, flags);
2675 cnow = info->icount; /* atomic copy */
2676 spin_unlock_irqrestore(&info->card->card_lock, flags);
2677
2678 ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
2679 ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
2680 ((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
2681 ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
2682
2683 *cprev = cnow;
2684
2685 return ret;
2686}
1da177e4
LT		 2687
2688/*
2689 * This routine allows the tty driver to implement device-
2690 * specific ioctl's. If the ioctl number passed in cmd is
2691 * not recognized by the driver, it should return ENOIOCTLCMD.
2692 */
2693static int
02f1175c
JS		 2694cy_ioctl(struct tty_struct *tty, struct file *file,
2695 unsigned int cmd, unsigned long arg)
1da177e4 2696{
cab9bdd1 2697 struct cyclades_port *info = tty->driver_data;
6c28181c 2698 struct cyclades_icount cnow; /* kernel counter temps */
02f1175c
JS		 2699 int ret_val = 0;
2700 unsigned long flags;
2701 void __user *argp = (void __user *)arg;
2702
2703 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
2704 return -ENODEV;
1da177e4
LT		 2705
2706#ifdef CY_DEBUG_OTHER
21719191
JS		 2707 printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
2708 info->line, cmd, arg);
1da177e4 2709#endif
7b130c0e 2710 lock_kernel();
1da177e4 2711
02f1175c
JS		 2712 switch (cmd) {
2713 case CYGETMON:
6c28181c
JS		 2714 if (copy_to_user(argp, &info->mon, sizeof(info->mon))) {
2715 ret_val = -EFAULT;
2716 break;
2717 }
2718 memset(&info->mon, 0, sizeof(info->mon));
02f1175c
JS		 2719 break;
2720 case CYGETTHRESH:
2721 ret_val = get_threshold(info, argp);
2722 break;
2723 case CYSETTHRESH:
2724 ret_val = set_threshold(info, arg);
2725 break;
2726 case CYGETDEFTHRESH:
6c28181c
JS		 2727 ret_val = put_user(info->default_threshold,
2728 (unsigned long __user *)argp);
02f1175c
JS		 2729 break;
2730 case CYSETDEFTHRESH:
6c28181c 2731 info->default_threshold = arg & 0x0f;
02f1175c
JS		 2732 break;
2733 case CYGETTIMEOUT:
2734 ret_val = get_timeout(info, argp);
2735 break;
2736 case CYSETTIMEOUT:
2737 ret_val = set_timeout(info, arg);
2738 break;
2739 case CYGETDEFTIMEOUT:
6c28181c
JS		 2740 ret_val = put_user(info->default_timeout,
2741 (unsigned long __user *)argp);
02f1175c
JS		 2742 break;
2743 case CYSETDEFTIMEOUT:
6c28181c 2744 info->default_timeout = arg & 0xff;
02f1175c 2745 break;
1da177e4 2746 case CYSETRFLOW:
02f1175c 2747 info->rflow = (int)arg;
02f1175c 2748 break;
1da177e4 2749 case CYGETRFLOW:
02f1175c
JS		 2750 ret_val = info->rflow;
2751 break;
1da177e4 2752 case CYSETRTSDTR_INV:
02f1175c 2753 info->rtsdtr_inv = (int)arg;
02f1175c 2754 break;
1da177e4 2755 case CYGETRTSDTR_INV:
02f1175c
JS		 2756 ret_val = info->rtsdtr_inv;
2757 break;
1da177e4 2758 case CYGETCD1400VER:
02f1175c
JS		 2759 ret_val = info->chip_rev;
2760 break;
1da177e4
LT		 2761#ifndef CONFIG_CYZ_INTR
2762 case CYZSETPOLLCYCLE:
02f1175c 2763 cyz_polling_cycle = (arg * HZ) / 1000;
02f1175c 2764 break;
1da177e4 2765 case CYZGETPOLLCYCLE:
02f1175c
JS		 2766 ret_val = (cyz_polling_cycle * 1000) / HZ;
2767 break;
2768#endif /* CONFIG_CYZ_INTR */
1da177e4 2769 case CYSETWAIT:
44b7d1b3 2770 info->port.closing_wait = (unsigned short)arg * HZ / 100;
02f1175c 2771 break;
1da177e4 2772 case CYGETWAIT:
44b7d1b3 2773 ret_val = info->port.closing_wait / (HZ / 100);
02f1175c
JS		 2774 break;
2775 case TIOCGSERIAL:
6c28181c 2776 ret_val = cy_get_serial_info(info, argp);
02f1175c
JS		 2777 break;
2778 case TIOCSSERIAL:
d13549f8 2779 ret_val = cy_set_serial_info(info, tty, argp);
02f1175c
JS		 2780 break;
2781 case TIOCSERGETLSR: /* Get line status register */
2782 ret_val = get_lsr_info(info, argp);
2783 break;
2784 /*
2785 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
2786 * - mask passed in arg for lines of interest
2787 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
2788 * Caller should use TIOCGICOUNT to see which one it was
2789 */
1da177e4 2790 case TIOCMIWAIT:
9fa1b3b1 2791 spin_lock_irqsave(&info->card->card_lock, flags);
02f1175c 2792 /* note the counters on entry */
2c7fea99 2793 cnow = info->icount;
9fa1b3b1 2794 spin_unlock_irqrestore(&info->card->card_lock, flags);
6c28181c
JS		 2795 ret_val = wait_event_interruptible(info->delta_msr_wait,
2796 cy_cflags_changed(info, arg, &cnow));
2c7fea99 2797 break;
1da177e4 2798
02f1175c
JS		 2799 /*
2800 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
2801 * Return: write counters to the user passed counter struct
2802 * NB: both 1->0 and 0->1 transitions are counted except for
2803 * RI where only 0->1 is counted.
2804 */
6c28181c
JS		 2805 case TIOCGICOUNT: {
2806 struct serial_icounter_struct sic = { };
2807
9fa1b3b1 2808 spin_lock_irqsave(&info->card->card_lock, flags);
02f1175c 2809 cnow = info->icount;
9fa1b3b1 2810 spin_unlock_irqrestore(&info->card->card_lock, flags);
6c28181c
JS		 2811
2812 sic.cts = cnow.cts;
2813 sic.dsr = cnow.dsr;
2814 sic.rng = cnow.rng;
2815 sic.dcd = cnow.dcd;
2816 sic.rx = cnow.rx;
2817 sic.tx = cnow.tx;
2818 sic.frame = cnow.frame;
2819 sic.overrun = cnow.overrun;
2820 sic.parity = cnow.parity;
2821 sic.brk = cnow.brk;
2822 sic.buf_overrun = cnow.buf_overrun;
2823
2824 if (copy_to_user(argp, &sic, sizeof(sic)))
2825 ret_val = -EFAULT;
02f1175c 2826 break;
6c28181c 2827 }
02f1175c
JS		 2828 default:
2829 ret_val = -ENOIOCTLCMD;
2830 }
7b130c0e 2831 unlock_kernel();
1da177e4
LT		 2832
2833#ifdef CY_DEBUG_OTHER
21719191 2834 printk(KERN_DEBUG "cyc:cy_ioctl done\n");
1da177e4 2835#endif
02f1175c
JS		 2836 return ret_val;
2837} /* cy_ioctl */
1da177e4
LT		 2838
2839/*
2840 * This routine allows the tty driver to be notified when
2841 * device's termios settings have changed. Note that a
2842 * well-designed tty driver should be prepared to accept the case
2843 * where old == NULL, and try to do something rational.
2844 */
02f1175c 2845static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1da177e4 2846{
cab9bdd1 2847 struct cyclades_port *info = tty->driver_data;
1da177e4
LT		 2848
2849#ifdef CY_DEBUG_OTHER
21719191 2850 printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
1da177e4
LT		 2851#endif
2852
d13549f8 2853 cy_set_line_char(info, tty);
02f1175c
JS		 2854
2855 if ((old_termios->c_cflag & CRTSCTS) &&
2856 !(tty->termios->c_cflag & CRTSCTS)) {
2857 tty->hw_stopped = 0;
2858 cy_start(tty);
2859 }
1da177e4 2860#if 0
02f1175c
JS		 2861 /*
2862 * No need to wake up processes in open wait, since they
2863 * sample the CLOCAL flag once, and don't recheck it.
2864 * XXX It's not clear whether the current behavior is correct
2865 * or not. Hence, this may change.....
2866 */
2867 if (!(old_termios->c_cflag & CLOCAL) &&
2868 (tty->termios->c_cflag & CLOCAL))
77451e53 2869 wake_up_interruptible(&info->port.open_wait);
1da177e4 2870#endif
02f1175c 2871} /* cy_set_termios */
1da177e4
LT		 2872
2873/* This function is used to send a high-priority XON/XOFF character to
2874 the device.
2875*/
02f1175c 2876static void cy_send_xchar(struct tty_struct *tty, char ch)
1da177e4 2877{
cab9bdd1 2878 struct cyclades_port *info = tty->driver_data;
875b206b
JS		 2879 struct cyclades_card *card;
2880 int channel;
1da177e4 2881
02f1175c 2882 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
1da177e4
LT		 2883 return;
2884
02f1175c 2885 info->x_char = ch;
1da177e4
LT		 2886
2887 if (ch)
02f1175c 2888 cy_start(tty);
1da177e4
LT		 2889
2890 card = info->card;
875b206b 2891 channel = info->line - card->first_line;
1da177e4 2892
2693f485 2893 if (cy_is_Z(card)) {
02f1175c 2894 if (ch == STOP_CHAR(tty))
875b206b 2895 cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
02f1175c 2896 else if (ch == START_CHAR(tty))
875b206b 2897 cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
1da177e4
LT		 2898 }
2899}
2900
2901/* This routine is called by the upper-layer tty layer to signal
2902 that incoming characters should be throttled because the input
2903 buffers are close to full.
2904 */
02f1175c 2905static void cy_throttle(struct tty_struct *tty)
1da177e4 2906{
cab9bdd1 2907 struct cyclades_port *info = tty->driver_data;
875b206b 2908 struct cyclades_card *card;
02f1175c 2909 unsigned long flags;
1da177e4
LT		 2910
2911#ifdef CY_DEBUG_THROTTLE
02f1175c 2912 char buf[64];
1da177e4 2913
21719191 2914 printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
02f1175c 2915 tty->ldisc.chars_in_buffer(tty), info->line);
1da177e4
LT		 2916#endif
2917
15ed6cc0 2918 if (serial_paranoia_check(info, tty->name, "cy_throttle"))
02f1175c 2919 return;
02f1175c
JS		 2920
2921 card = info->card;
2922
2923 if (I_IXOFF(tty)) {
2693f485 2924 if (!cy_is_Z(card))
02f1175c
JS		 2925 cy_send_xchar(tty, STOP_CHAR(tty));
2926 else
2927 info->throttle = 1;
2928 }
1da177e4 2929
02f1175c 2930 if (tty->termios->c_cflag & CRTSCTS) {
2693f485 2931 if (!cy_is_Z(card)) {
9fa1b3b1 2932 spin_lock_irqsave(&card->card_lock, flags);
4d768200 2933 cyy_change_rts_dtr(info, 0, TIOCM_RTS);
9fa1b3b1 2934 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2935 } else {
2936 info->throttle = 1;
2937 }
2938 }
02f1175c 2939} /* cy_throttle */
1da177e4
LT		 2940
2941/*
2942 * This routine notifies the tty driver that it should signal
2943 * that characters can now be sent to the tty without fear of
2944 * overrunning the input buffers of the line disciplines.
2945 */
02f1175c 2946static void cy_unthrottle(struct tty_struct *tty)
1da177e4 2947{
cab9bdd1 2948 struct cyclades_port *info = tty->driver_data;
875b206b 2949 struct cyclades_card *card;
02f1175c 2950 unsigned long flags;
1da177e4
LT		 2951
2952#ifdef CY_DEBUG_THROTTLE
02f1175c
JS		 2953 char buf[64];
2954
21719191 2955 printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
15ed6cc0 2956 tty_name(tty, buf), tty_chars_in_buffer(tty), info->line);
1da177e4
LT		 2957#endif
2958
15ed6cc0 2959 if (serial_paranoia_check(info, tty->name, "cy_unthrottle"))
02f1175c 2960 return;
1da177e4 2961
02f1175c
JS		 2962 if (I_IXOFF(tty)) {
2963 if (info->x_char)
2964 info->x_char = 0;
2965 else
2966 cy_send_xchar(tty, START_CHAR(tty));
1da177e4 2967 }
1da177e4 2968
02f1175c
JS		 2969 if (tty->termios->c_cflag & CRTSCTS) {
2970 card = info->card;
2693f485 2971 if (!cy_is_Z(card)) {
9fa1b3b1 2972 spin_lock_irqsave(&card->card_lock, flags);
4d768200 2973 cyy_change_rts_dtr(info, TIOCM_RTS, 0);
9fa1b3b1 2974 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2975 } else {
2976 info->throttle = 0;
2977 }
2978 }
02f1175c 2979} /* cy_unthrottle */
1da177e4
LT		 2980
2981/* cy_start and cy_stop provide software output flow control as a
2982 function of XON/XOFF, software CTS, and other such stuff.
2983*/
02f1175c 2984static void cy_stop(struct tty_struct *tty)
1da177e4 2985{
02f1175c 2986 struct cyclades_card *cinfo;
cab9bdd1 2987 struct cyclades_port *info = tty->driver_data;
3aeea5b9 2988 int channel;
02f1175c 2989 unsigned long flags;
1da177e4
LT		 2990
2991#ifdef CY_DEBUG_OTHER
21719191 2992 printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
1da177e4
LT		 2993#endif
2994
02f1175c
JS		 2995 if (serial_paranoia_check(info, tty->name, "cy_stop"))
2996 return;
1da177e4 2997
875b206b 2998 cinfo = info->card;
02f1175c 2999 channel = info->line - cinfo->first_line;
2693f485 3000 if (!cy_is_Z(cinfo)) {
9fa1b3b1 3001 spin_lock_irqsave(&cinfo->card_lock, flags);
3aeea5b9
JS		 3002 cyy_writeb(info, CyCAR, channel & 0x03);
3003 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyTxRdy);
9fa1b3b1 3004 spin_unlock_irqrestore(&cinfo->card_lock, flags);
02f1175c 3005 }
02f1175c 3006} /* cy_stop */
1da177e4 3007
02f1175c 3008static void cy_start(struct tty_struct *tty)
1da177e4 3009{
02f1175c 3010 struct cyclades_card *cinfo;
cab9bdd1 3011 struct cyclades_port *info = tty->driver_data;
3aeea5b9 3012 int channel;
02f1175c 3013 unsigned long flags;
1da177e4
LT		 3014
3015#ifdef CY_DEBUG_OTHER
21719191 3016 printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
1da177e4
LT		 3017#endif
3018
02f1175c
JS		 3019 if (serial_paranoia_check(info, tty->name, "cy_start"))
3020 return;
1da177e4 3021
875b206b 3022 cinfo = info->card;
02f1175c 3023 channel = info->line - cinfo->first_line;
2693f485 3024 if (!cy_is_Z(cinfo)) {
9fa1b3b1 3025 spin_lock_irqsave(&cinfo->card_lock, flags);
3aeea5b9
JS		 3026 cyy_writeb(info, CyCAR, channel & 0x03);
3027 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyTxRdy);
9fa1b3b1 3028 spin_unlock_irqrestore(&cinfo->card_lock, flags);
02f1175c 3029 }
02f1175c 3030} /* cy_start */
1da177e4 3031
1da177e4
LT		 3032/*
3033 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
3034 */
02f1175c 3035static void cy_hangup(struct tty_struct *tty)
1da177e4 3036{
cab9bdd1 3037 struct cyclades_port *info = tty->driver_data;
02f1175c 3038
1da177e4 3039#ifdef CY_DEBUG_OTHER
21719191 3040 printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
1da177e4
LT		 3041#endif
3042
02f1175c
JS		 3043 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
3044 return;
1da177e4 3045
02f1175c 3046 cy_flush_buffer(tty);
d13549f8 3047 cy_shutdown(info, tty);
174e6fe0 3048 tty_port_hangup(&info->port);
02f1175c 3049} /* cy_hangup */
1da177e4 3050
f0737579
JS		 3051static int cyy_carrier_raised(struct tty_port *port)
3052{
3053 struct cyclades_port *info = container_of(port, struct cyclades_port,
3054 port);
3055 struct cyclades_card *cinfo = info->card;
f0737579
JS		 3056 unsigned long flags;
3057 int channel = info->line - cinfo->first_line;
f0737579
JS		 3058 u32 cd;
3059
f0737579 3060 spin_lock_irqsave(&cinfo->card_lock, flags);
3aeea5b9
JS		 3061 cyy_writeb(info, CyCAR, channel & 0x03);
3062 cd = cyy_readb(info, CyMSVR1) & CyDCD;
f0737579
JS		 3063 spin_unlock_irqrestore(&cinfo->card_lock, flags);
3064
3065 return cd;
3066}
3067
3068static void cyy_dtr_rts(struct tty_port *port, int raise)
3069{
3070 struct cyclades_port *info = container_of(port, struct cyclades_port,
3071 port);
3072 struct cyclades_card *cinfo = info->card;
f0737579 3073 unsigned long flags;
f0737579
JS		 3074
3075 spin_lock_irqsave(&cinfo->card_lock, flags);
4d768200
JS		 3076 cyy_change_rts_dtr(info, raise ? TIOCM_RTS | TIOCM_DTR : 0,
3077 raise ? 0 : TIOCM_RTS | TIOCM_DTR);
f0737579
JS		 3078 spin_unlock_irqrestore(&cinfo->card_lock, flags);
3079}
3080
3081static int cyz_carrier_raised(struct tty_port *port)
3082{
3083 struct cyclades_port *info = container_of(port, struct cyclades_port,
3084 port);
f0737579 3085
f0eefdc3 3086 return readl(&info->u.cyz.ch_ctrl->rs_status) & C_RS_DCD;
f0737579
JS		 3087}
3088
3089static void cyz_dtr_rts(struct tty_port *port, int raise)
3090{
3091 struct cyclades_port *info = container_of(port, struct cyclades_port,
3092 port);
3093 struct cyclades_card *cinfo = info->card;
f0eefdc3 3094 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
f0737579
JS		 3095 int ret, channel = info->line - cinfo->first_line;
3096 u32 rs;
3097
f0eefdc3 3098 rs = readl(&ch_ctrl->rs_control);
f0737579
JS		 3099 if (raise)
3100 rs |= C_RS_RTS | C_RS_DTR;
3101 else
3102 rs &= ~(C_RS_RTS | C_RS_DTR);
f0eefdc3 3103 cy_writel(&ch_ctrl->rs_control, rs);
f0737579
JS		 3104 ret = cyz_issue_cmd(cinfo, channel, C_CM_IOCTLM, 0L);
3105 if (ret != 0)
3106 printk(KERN_ERR "%s: retval on ttyC%d was %x\n",
3107 __func__, info->line, ret);
3108#ifdef CY_DEBUG_DTR
3109 printk(KERN_DEBUG "%s: raising Z DTR\n", __func__);
3110#endif
3111}
3112
3113static const struct tty_port_operations cyy_port_ops = {
3114 .carrier_raised = cyy_carrier_raised,
3115 .dtr_rts = cyy_dtr_rts,
3116};
3117
3118static const struct tty_port_operations cyz_port_ops = {
3119 .carrier_raised = cyz_carrier_raised,
3120 .dtr_rts = cyz_dtr_rts,
3121};
3122
1da177e4
LT		 3123/*
3124 * ---------------------------------------------------------------------
3125 * cy_init() and friends
3126 *
3127 * cy_init() is called at boot-time to initialize the serial driver.
3128 * ---------------------------------------------------------------------
3129 */
3130
dd025c0c 3131static int __devinit cy_init_card(struct cyclades_card *cinfo)
0809e267
JS		 3132{
3133 struct cyclades_port *info;
f0eefdc3 3134 unsigned int channel, port;
0809e267 3135
3046d50e 3136 spin_lock_init(&cinfo->card_lock);
963118ee 3137 cinfo->intr_enabled = 0;
3046d50e 3138
963118ee
JS		 3139 cinfo->ports = kcalloc(cinfo->nports, sizeof(*cinfo->ports),
3140 GFP_KERNEL);
dd025c0c
JS		 3141 if (cinfo->ports == NULL) {
3142 printk(KERN_ERR "Cyclades: cannot allocate ports\n");
3143 return -ENOMEM;
3144 }
3145
f0eefdc3
JS		 3146 for (channel = 0, port = cinfo->first_line; channel < cinfo->nports;
3147 channel++, port++) {
3148 info = &cinfo->ports[channel];
44b7d1b3 3149 tty_port_init(&info->port);
3046d50e 3150 info->magic = CYCLADES_MAGIC;
875b206b 3151 info->card = cinfo;
3046d50e 3152 info->line = port;
3046d50e 3153
44b7d1b3
AC		 3154 info->port.closing_wait = CLOSING_WAIT_DELAY;
3155 info->port.close_delay = 5 * HZ / 10;
77451e53 3156 info->port.flags = STD_COM_FLAGS;
2c7fea99 3157 init_completion(&info->shutdown_wait);
3046d50e
JS		 3158 init_waitqueue_head(&info->delta_msr_wait);
3159
2693f485 3160 if (cy_is_Z(cinfo)) {
f0eefdc3
JS		 3161 struct FIRM_ID *firm_id = cinfo->base_addr + ID_ADDRESS;
3162 struct ZFW_CTRL *zfw_ctrl;
3163
f0737579 3164 info->port.ops = &cyz_port_ops;
0809e267 3165 info->type = PORT_STARTECH;
f0eefdc3
JS		 3166
3167 zfw_ctrl = cinfo->base_addr +
3168 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3169 info->u.cyz.ch_ctrl = &zfw_ctrl->ch_ctrl[channel];
3170 info->u.cyz.buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3171
101b8159 3172 if (cinfo->hw_ver == ZO_V1)
0809e267
JS		 3173 info->xmit_fifo_size = CYZ_FIFO_SIZE;
3174 else
3046d50e 3175 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
0809e267 3176#ifdef CONFIG_CYZ_INTR
3991428d
JS		 3177 setup_timer(&cyz_rx_full_timer[port],
3178 cyz_rx_restart, (unsigned long)info);
0809e267 3179#endif
3046d50e 3180 } else {
f0eefdc3 3181 unsigned short chip_number;
963118ee 3182 int index = cinfo->bus_index;
f0eefdc3 3183
f0737579 3184 info->port.ops = &cyy_port_ops;
0809e267 3185 info->type = PORT_CIRRUS;
0809e267 3186 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
3046d50e 3187 info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
0809e267
JS		 3188 info->cor2 = CyETC;
3189 info->cor3 = 0x08; /* _very_ small rcv threshold */
3046d50e 3190
f0eefdc3 3191 chip_number = channel / CyPORTS_PER_CHIP;
3aeea5b9
JS		 3192 info->u.cyy.base_addr = cinfo->base_addr +
3193 (cy_chip_offset[chip_number] << index);
3194 info->chip_rev = cyy_readb(info, CyGFRCR);
15ed6cc0
AC		 3195
3196 if (info->chip_rev >= CD1400_REV_J) {
0809e267
JS		 3197 /* It is a CD1400 rev. J or later */
3198 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
3199 info->tco = baud_co_60[13]; /* Tx CO */
3200 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
3201 info->rco = baud_co_60[13]; /* Rx CO */
0809e267
JS		 3202 info->rtsdtr_inv = 1;
3203 } else {
3204 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
3205 info->tco = baud_co_25[13]; /* Tx CO */
3206 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
3207 info->rco = baud_co_25[13]; /* Rx CO */
0809e267
JS		 3208 info->rtsdtr_inv = 0;
3209 }
3046d50e
JS		 3210 info->read_status_mask = CyTIMEOUT | CySPECHAR |
3211 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
0809e267 3212 }
3046d50e 3213
0809e267 3214 }
3046d50e
JS		 3215
3216#ifndef CONFIG_CYZ_INTR
2693f485 3217 if (cy_is_Z(cinfo) && !timer_pending(&cyz_timerlist)) {
3046d50e
JS		 3218 mod_timer(&cyz_timerlist, jiffies + 1);
3219#ifdef CY_PCI_DEBUG
3220 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
3221#endif
3222 }
3223#endif
dd025c0c 3224 return 0;
0809e267
JS		 3225}
3226
1da177e4
LT		 3227/* initialize chips on Cyclom-Y card -- return number of valid
3228 chips (which is number of ports/4) */
31b4f0a1
JS		 3229static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
3230 int index)
1da177e4 3231{
02f1175c
JS		 3232 unsigned int chip_number;
3233 void __iomem *base_addr;
3234
3235 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
3236 /* Cy_HwReset is 0x1400 */
3237 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
3238 /* Cy_ClrIntr is 0x1800 */
3239 udelay(500L);
3240
15ed6cc0
AC		 3241 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD;
3242 chip_number++) {
02f1175c
JS		 3243 base_addr =
3244 true_base_addr + (cy_chip_offset[chip_number] << index);
3245 mdelay(1);
db05c3b1 3246 if (readb(base_addr + (CyCCR << index)) != 0x00) {
02f1175c
JS		 3247 /*************
3248 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
3249 chip_number, (unsigned long)base_addr);
3250 *************/
3251 return chip_number;
3252 }
3253
3254 cy_writeb(base_addr + (CyGFRCR << index), 0);
3255 udelay(10L);
3256
3257 /* The Cyclom-16Y does not decode address bit 9 and therefore
3258 cannot distinguish between references to chip 0 and a non-
3259 existent chip 4. If the preceding clearing of the supposed
3260 chip 4 GFRCR register appears at chip 0, there is no chip 4
3261 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
3262 */
db05c3b1 3263 if (chip_number == 4 && readb(true_base_addr +
02f1175c
JS		 3264 (cy_chip_offset[0] << index) +
3265 (CyGFRCR << index)) == 0) {
3266 return chip_number;
3267 }
3268
3269 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
3270 mdelay(1);
3271
db05c3b1 3272 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
02f1175c
JS		 3273 /*
3274 printk(" chip #%d at %#6lx is not responding ",
3275 chip_number, (unsigned long)base_addr);
3276 printk("(GFRCR stayed 0)\n",
3277 */
3278 return chip_number;
3279 }
db05c3b1 3280 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
02f1175c
JS		 3281 0x40) {
3282 /*
3283 printk(" chip #%d at %#6lx is not valid (GFRCR == "
3284 "%#2x)\n",
3285 chip_number, (unsigned long)base_addr,
3286 base_addr[CyGFRCR<<index]);
3287 */
3288 return chip_number;
3289 }
3290 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
db05c3b1 3291 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
02f1175c
JS		 3292 /* It is a CD1400 rev. J or later */
3293 /* Impossible to reach 5ms with this chip.
3294 Changed to 2ms instead (f = 500 Hz). */
3295 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
3296 } else {
3297 /* f = 200 Hz */
3298 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
3299 }
1da177e4 3300
02f1175c
JS		 3301 /*
3302 printk(" chip #%d at %#6lx is rev 0x%2x\n",
3303 chip_number, (unsigned long)base_addr,
db05c3b1 3304 readb(base_addr+(CyGFRCR<<index)));
02f1175c
JS		 3305 */
3306 }
3307 return chip_number;
3308} /* cyy_init_card */
1da177e4
LT		 3309
3310/*
3311 * ---------------------------------------------------------------------
3312 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
3313 * sets global variables and return the number of ISA boards found.
3314 * ---------------------------------------------------------------------
3315 */
02f1175c 3316static int __init cy_detect_isa(void)
1da177e4
LT		 3317{
3318#ifdef CONFIG_ISA
02f1175c
JS		 3319 unsigned short cy_isa_irq, nboard;
3320 void __iomem *cy_isa_address;
3321 unsigned short i, j, cy_isa_nchan;
1da177e4 3322#ifdef MODULE
02f1175c 3323 int isparam = 0;
1da177e4
LT		 3324#endif
3325
02f1175c 3326 nboard = 0;
1da177e4
LT		 3327
3328#ifdef MODULE
3329 /* Check for module parameters */
02f1175c
JS		 3330 for (i = 0; i < NR_CARDS; i++) {
3331 if (maddr[i] || i) {
3332 isparam = 1;
3333 cy_isa_addresses[i] = maddr[i];
3334 }
3335 if (!maddr[i])
3336 break;
1da177e4
LT		 3337 }
3338#endif
3339
02f1175c
JS		 3340 /* scan the address table probing for Cyclom-Y/ISA boards */
3341 for (i = 0; i < NR_ISA_ADDRS; i++) {
3342 unsigned int isa_address = cy_isa_addresses[i];
15ed6cc0 3343 if (isa_address == 0x0000)
096dcfce 3344 return nboard;
1da177e4 3345
02f1175c 3346 /* probe for CD1400... */
cd989b3a 3347 cy_isa_address = ioremap_nocache(isa_address, CyISA_Ywin);
3137553d
JS		 3348 if (cy_isa_address == NULL) {
3349 printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
3350 "address\n");
3351 continue;
3352 }
02f1175c
JS		 3353 cy_isa_nchan = CyPORTS_PER_CHIP *
3354 cyy_init_card(cy_isa_address, 0);
3355 if (cy_isa_nchan == 0) {
3137553d 3356 iounmap(cy_isa_address);
02f1175c
JS		 3357 continue;
3358 }
1da177e4
LT		 3359#ifdef MODULE
3360 if (isparam && irq[i])
02f1175c 3361 cy_isa_irq = irq[i];
1da177e4
LT		 3362 else
3363#endif
02f1175c
JS		 3364 /* find out the board's irq by probing */
3365 cy_isa_irq = detect_isa_irq(cy_isa_address);
3366 if (cy_isa_irq == 0) {
21719191
JS		 3367 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
3368 "IRQ could not be detected.\n",
02f1175c 3369 (unsigned long)cy_isa_address);
3137553d 3370 iounmap(cy_isa_address);
02f1175c
JS		 3371 continue;
3372 }
3373
3374 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
21719191
JS		 3375 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
3376 "more channels are available. Change NR_PORTS "
3377 "in cyclades.c and recompile kernel.\n",
02f1175c 3378 (unsigned long)cy_isa_address);
3137553d 3379 iounmap(cy_isa_address);
096dcfce 3380 return nboard;
02f1175c
JS		 3381 }
3382 /* fill the next cy_card structure available */
3383 for (j = 0; j < NR_CARDS; j++) {
f7429034 3384 if (cy_card[j].base_addr == NULL)
02f1175c
JS		 3385 break;
3386 }
3387 if (j == NR_CARDS) { /* no more cy_cards available */
21719191
JS		 3388 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
3389 "more cards can be used. Change NR_CARDS in "
3390 "cyclades.c and recompile kernel.\n",
02f1175c 3391 (unsigned long)cy_isa_address);
3137553d 3392 iounmap(cy_isa_address);
096dcfce 3393 return nboard;
02f1175c
JS		 3394 }
3395
3396 /* allocate IRQ */
3397 if (request_irq(cy_isa_irq, cyy_interrupt,
3398 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
21719191
JS		 3399 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
3400 "could not allocate IRQ#%d.\n",
3401 (unsigned long)cy_isa_address, cy_isa_irq);
3137553d 3402 iounmap(cy_isa_address);
096dcfce 3403 return nboard;
02f1175c
JS		 3404 }
3405
3406 /* set cy_card */
3407 cy_card[j].base_addr = cy_isa_address;
97e87f8e 3408 cy_card[j].ctl_addr.p9050 = NULL;
02f1175c
JS		 3409 cy_card[j].irq = (int)cy_isa_irq;
3410 cy_card[j].bus_index = 0;
3411 cy_card[j].first_line = cy_next_channel;
963118ee
JS		 3412 cy_card[j].num_chips = cy_isa_nchan / CyPORTS_PER_CHIP;
3413 cy_card[j].nports = cy_isa_nchan;
3137553d
JS		 3414 if (cy_init_card(&cy_card[j])) {
3415 cy_card[j].base_addr = NULL;
3416 free_irq(cy_isa_irq, &cy_card[j]);
3417 iounmap(cy_isa_address);
3418 continue;
3419 }
02f1175c
JS		 3420 nboard++;
3421
21719191
JS		 3422 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
3423 "%d channels starting from port %d\n",
02f1175c
JS		 3424 j + 1, (unsigned long)cy_isa_address,
3425 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
21719191
JS		 3426 cy_isa_irq, cy_isa_nchan, cy_next_channel);
3427
6ad1ccc1
JS		 3428 for (j = cy_next_channel;
3429 j < cy_next_channel + cy_isa_nchan; j++)
3430 tty_register_device(cy_serial_driver, j, NULL);
02f1175c
JS		 3431 cy_next_channel += cy_isa_nchan;
3432 }
096dcfce 3433 return nboard;
1da177e4 3434#else
096dcfce 3435 return 0;
02f1175c
JS		 3436#endif /* CONFIG_ISA */
3437} /* cy_detect_isa */
1da177e4 3438
58936d8d 3439#ifdef CONFIG_PCI
054f5b0a
JS		 3440static inline int __devinit cyc_isfwstr(const char *str, unsigned int size)
3441{
3442 unsigned int a;
3443
3444 for (a = 0; a < size && *str; a++, str++)
3445 if (*str & 0x80)
3446 return -EINVAL;
3447
3448 for (; a < size; a++, str++)
3449 if (*str)
3450 return -EINVAL;
3451
3452 return 0;
3453}
3454
f61e761e 3455static inline void __devinit cyz_fpga_copy(void __iomem *fpga, const u8 *data,
054f5b0a
JS		 3456 unsigned int size)
3457{
3458 for (; size > 0; size--) {
3459 cy_writel(fpga, *data++);
3460 udelay(10);
3461 }
3462}
3463
3464static void __devinit plx_init(struct pci_dev *pdev, int irq,
3465 struct RUNTIME_9060 __iomem *addr)
1da177e4 3466{
02f1175c 3467 /* Reset PLX */
054f5b0a 3468 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
02f1175c 3469 udelay(100L);
054f5b0a 3470 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
02f1175c
JS		 3471
3472 /* Reload Config. Registers from EEPROM */
054f5b0a 3473 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
02f1175c 3474 udelay(100L);
054f5b0a
JS		 3475 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);
3476
3477 /* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
3478 * the IRQ is lost and, thus, we have to re-write it to the PCI config.
3479 * registers. This will remain here until we find a permanent fix.
3480 */
3481 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
3482}
3483
3484static int __devinit __cyz_load_fw(const struct firmware *fw,
3485 const char *name, const u32 mailbox, void __iomem *base,
3486 void __iomem *fpga)
3487{
f61e761e
DW		 3488 const void *ptr = fw->data;
3489 const struct zfile_header *h = ptr;
3490 const struct zfile_config *c, *cs;
3491 const struct zfile_block *b, *bs;
054f5b0a
JS		 3492 unsigned int a, tmp, len = fw->size;
3493#define BAD_FW KERN_ERR "Bad firmware: "
3494 if (len < sizeof(*h)) {
3495 printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h));
3496 return -EINVAL;
3497 }
3498
3499 cs = ptr + h->config_offset;
3500 bs = ptr + h->block_offset;
3501
3502 if ((void *)(cs + h->n_config) > ptr + len ||
3503 (void *)(bs + h->n_blocks) > ptr + len) {
3504 printk(BAD_FW "too short");
3505 return -EINVAL;
3506 }
3507
3508 if (cyc_isfwstr(h->name, sizeof(h->name)) ||
3509 cyc_isfwstr(h->date, sizeof(h->date))) {
3510 printk(BAD_FW "bad formatted header string\n");
3511 return -EINVAL;
3512 }
3513
3514 if (strncmp(name, h->name, sizeof(h->name))) {
3515 printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
3516 return -EINVAL;
3517 }
3518
3519 tmp = 0;
3520 for (c = cs; c < cs + h->n_config; c++) {
3521 for (a = 0; a < c->n_blocks; a++)
3522 if (c->block_list[a] > h->n_blocks) {
3523 printk(BAD_FW "bad block ref number in cfgs\n");
3524 return -EINVAL;
3525 }
3526 if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
3527 tmp++;
3528 }
3529 if (!tmp) {
3530 printk(BAD_FW "nothing appropriate\n");
3531 return -EINVAL;
3532 }
3533
3534 for (b = bs; b < bs + h->n_blocks; b++)
3535 if (b->file_offset + b->size > len) {
3536 printk(BAD_FW "bad block data offset\n");
3537 return -EINVAL;
3538 }
3539
3540 /* everything is OK, let's seek'n'load it */
3541 for (c = cs; c < cs + h->n_config; c++)
3542 if (c->mailbox == mailbox && c->function == 0)
3543 break;
3544
3545 for (a = 0; a < c->n_blocks; a++) {
3546 b = &bs[c->block_list[a]];
3547 if (b->type == ZBLOCK_FPGA) {
3548 if (fpga != NULL)
3549 cyz_fpga_copy(fpga, ptr + b->file_offset,
3550 b->size);
3551 } else {
3552 if (base != NULL)
3553 memcpy_toio(base + b->ram_offset,
3554 ptr + b->file_offset, b->size);
3555 }
3556 }
3557#undef BAD_FW
3558 return 0;
3559}
3560
3561static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
3562 struct RUNTIME_9060 __iomem *ctl_addr, int irq)
3563{
3564 const struct firmware *fw;
3565 struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS;
3566 struct CUSTOM_REG __iomem *cust = base_addr;
3567 struct ZFW_CTRL __iomem *pt_zfwctrl;
c4923b4f 3568 void __iomem *tmp;
963118ee 3569 u32 mailbox, status, nchan;
054f5b0a
JS		 3570 unsigned int i;
3571 int retval;
3572
3573 retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev);
3574 if (retval) {
3575 dev_err(&pdev->dev, "can't get firmware\n");
3576 goto err;
3577 }
3578
3579 /* Check whether the firmware is already loaded and running. If
3580 positive, skip this board */
2693f485 3581 if (__cyz_fpga_loaded(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) {
054f5b0a
JS		 3582 u32 cntval = readl(base_addr + 0x190);
3583
3584 udelay(100);
3585 if (cntval != readl(base_addr + 0x190)) {
3586 /* FW counter is working, FW is running */
3587 dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. "
3588 "Skipping board.\n");
3589 retval = 0;
3590 goto err_rel;
3591 }
3592 }
3593
3594 /* start boot */
3595 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
3596 ~0x00030800UL);
3597
3598 mailbox = readl(&ctl_addr->mail_box_0);
3599
2693f485 3600 if (mailbox == 0 || __cyz_fpga_loaded(ctl_addr)) {
054f5b0a
JS		 3601 /* stops CPU and set window to beginning of RAM */
3602 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
3603 cy_writel(&cust->cpu_stop, 0);
3604 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
3605 udelay(100);
3606 }
3607
3608 plx_init(pdev, irq, ctl_addr);
3609
3610 if (mailbox != 0) {
3611 /* load FPGA */
3612 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
3613 base_addr);
3614 if (retval)
3615 goto err_rel;
2693f485 3616 if (!__cyz_fpga_loaded(ctl_addr)) {
054f5b0a
JS		 3617 dev_err(&pdev->dev, "fw upload successful, but fw is "
3618 "not loaded\n");
3619 goto err_rel;
3620 }
3621 }
3622
3623 /* stops CPU and set window to beginning of RAM */
3624 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
3625 cy_writel(&cust->cpu_stop, 0);
3626 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
3627 udelay(100);
3628
3629 /* clear memory */
c4923b4f 3630 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
054f5b0a
JS		 3631 cy_writeb(tmp, 255);
3632 if (mailbox != 0) {
3633 /* set window to last 512K of RAM */
3634 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE);
c4923b4f 3635 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
054f5b0a
JS		 3636 cy_writeb(tmp, 255);
3637 /* set window to beginning of RAM */
3638 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
054f5b0a
JS		 3639 }
3640
3641 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
3642 release_firmware(fw);
3643 if (retval)
3644 goto err;
3645
3646 /* finish boot and start boards */
3647 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
3648 cy_writel(&cust->cpu_start, 0);
3649 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
3650 i = 0;
3651 while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
3652 msleep(100);
3653 if (status != ZFIRM_ID) {
3654 if (status == ZFIRM_HLT) {
3655 dev_err(&pdev->dev, "you need an external power supply "
3656 "for this number of ports. Firmware halted and "
3657 "board reset.\n");
3658 retval = -EIO;
3659 goto err;
3660 }
3661 dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
3662 "some more time\n", status);
3663 while ((status = readl(&fid->signature)) != ZFIRM_ID &&
3664 i++ < 200)
3665 msleep(100);
3666 if (status != ZFIRM_ID) {
3667 dev_err(&pdev->dev, "Board not started in 20 seconds! "
3668 "Giving up. (fid->signature = 0x%x)\n",
3669 status);
3670 dev_info(&pdev->dev, "*** Warning ***: if you are "
3671 "upgrading the FW, please power cycle the "
3672 "system before loading the new FW to the "
3673 "Cyclades-Z.\n");
3674
2693f485 3675 if (__cyz_fpga_loaded(ctl_addr))
054f5b0a
JS		 3676 plx_init(pdev, irq, ctl_addr);
3677
3678 retval = -EIO;
3679 goto err;
3680 }
3681 dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
3682 i / 10);
3683 }
3684 pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);
3685
3686 dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
3687 base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr),
3688 base_addr + readl(&fid->zfwctrl_addr));
3689
963118ee 3690 nchan = readl(&pt_zfwctrl->board_ctrl.n_channel);
054f5b0a 3691 dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
963118ee 3692 readl(&pt_zfwctrl->board_ctrl.fw_version), nchan);
054f5b0a 3693
963118ee 3694 if (nchan == 0) {
054f5b0a
JS		 3695 dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please "
3696 "check the connection between the Z host card and the "
3697 "serial expanders.\n");
3698
2693f485 3699 if (__cyz_fpga_loaded(ctl_addr))
054f5b0a
JS		 3700 plx_init(pdev, irq, ctl_addr);
3701
3702 dev_info(&pdev->dev, "Null number of ports detected. Board "
3703 "reset.\n");
3704 retval = 0;
3705 goto err;
3706 }
3707
3708 cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
3709 cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);
3710
3711 /*
3712 Early firmware failed to start looking for commands.
3713 This enables firmware interrupts for those commands.
3714 */
3715 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
3716 (1 << 17));
3717 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
3718 0x00030800UL);
3719
963118ee 3720 return nchan;
054f5b0a
JS		 3721err_rel:
3722 release_firmware(fw);
3723err:
3724 return retval;
1da177e4
LT		 3725}
3726
58936d8d
JS		 3727static int __devinit cy_pci_probe(struct pci_dev *pdev,
3728 const struct pci_device_id *ent)
1da177e4 3729{
3137553d
JS		 3730 void __iomem *addr0 = NULL, *addr2 = NULL;
3731 char *card_name = NULL;
101b8159 3732 u32 uninitialized_var(mailbox);
3137553d
JS		 3733 unsigned int device_id, nchan = 0, card_no, i;
3734 unsigned char plx_ver;
3735 int retval, irq;
02f1175c 3736
58936d8d
JS		 3737 retval = pci_enable_device(pdev);
3738 if (retval) {
3739 dev_err(&pdev->dev, "cannot enable device\n");
3137553d 3740 goto err;
58936d8d 3741 }
1da177e4 3742
58936d8d 3743 /* read PCI configuration area */
3137553d 3744 irq = pdev->irq;
58936d8d 3745 device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
1da177e4 3746
3137553d
JS		 3747#if defined(__alpha__)
3748 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
3749 dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
3750 "addresses on Alpha systems.\n");
3751 retval = -EIO;
3752 goto err_dis;
3753 }
3754#endif
3755 if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
3756 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
3757 "addresses\n");
3758 retval = -EIO;
3759 goto err_dis;
3760 }
3761
3762 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
3763 dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
3764 "it...\n");
3765 pdev->resource[2].flags &= ~IORESOURCE_IO;
3766 }
3767
3768 retval = pci_request_regions(pdev, "cyclades");
3769 if (retval) {
3770 dev_err(&pdev->dev, "failed to reserve resources\n");
3771 goto err_dis;
3772 }
3773
3774 retval = -EIO;
58936d8d
JS		 3775 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
3776 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
3137553d 3777 card_name = "Cyclom-Y";
1da177e4 3778
24e6fd4c
JS		 3779 addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
3780 CyPCI_Yctl);
3137553d
JS		 3781 if (addr0 == NULL) {
3782 dev_err(&pdev->dev, "can't remap ctl region\n");
3783 goto err_reg;
58936d8d 3784 }
24e6fd4c
JS		 3785 addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
3786 CyPCI_Ywin);
3137553d
JS		 3787 if (addr2 == NULL) {
3788 dev_err(&pdev->dev, "can't remap base region\n");
3789 goto err_unmap;
58936d8d 3790 }
1da177e4 3791
3137553d
JS		 3792 nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
3793 if (nchan == 0) {
21719191
JS		 3794 dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
3795 "Serial-Modules\n");
c847d47c 3796 goto err_unmap;
58936d8d 3797 }
58936d8d 3798 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
3137553d 3799 struct RUNTIME_9060 __iomem *ctl_addr;
21719191 3800
24e6fd4c
JS		 3801 ctl_addr = addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
3802 CyPCI_Zctl);
3137553d
JS		 3803 if (addr0 == NULL) {
3804 dev_err(&pdev->dev, "can't remap ctl region\n");
3805 goto err_reg;
3806 }
58936d8d
JS		 3807
3808 /* Disable interrupts on the PLX before resetting it */
97e87f8e
JS		 3809 cy_writew(&ctl_addr->intr_ctrl_stat,
3810 readw(&ctl_addr->intr_ctrl_stat) & ~0x0900);
58936d8d 3811
054f5b0a 3812 plx_init(pdev, irq, addr0);
02f1175c 3813
101b8159 3814 mailbox = readl(&ctl_addr->mail_box_0);
58936d8d 3815
24e6fd4c
JS		 3816 addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
3817 mailbox == ZE_V1 ? CyPCI_Ze_win : CyPCI_Zwin);
3137553d
JS		 3818 if (addr2 == NULL) {
3819 dev_err(&pdev->dev, "can't remap base region\n");
3820 goto err_unmap;
58936d8d
JS		 3821 }
3822
3823 if (mailbox == ZE_V1) {
3137553d 3824 card_name = "Cyclades-Ze";
58936d8d 3825 } else {
3137553d 3826 card_name = "Cyclades-8Zo";
1da177e4 3827#ifdef CY_PCI_DEBUG
3137553d
JS		 3828 if (mailbox == ZO_V1) {
3829 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
3830 dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
3831 "id %lx, ver %lx\n", (ulong)(0xff &
3832 readl(&((struct CUSTOM_REG *)addr2)->
3833 fpga_id)), (ulong)(0xff &
3834 readl(&((struct CUSTOM_REG *)addr2)->
3835 fpga_version)));
3836 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
3837 } else {
3838 dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
3839 "Cyclades-Z board. FPGA not loaded\n");
3840 }
1da177e4 3841#endif
3137553d
JS		 3842 /* The following clears the firmware id word. This
3843 ensures that the driver will not attempt to talk to
3844 the board until it has been properly initialized.
3845 */
3846 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
3847 cy_writel(addr2 + ID_ADDRESS, 0L);
58936d8d 3848 }
ace08c3c
JS		 3849
3850 retval = cyz_load_fw(pdev, addr2, addr0, irq);
963118ee 3851 if (retval <= 0)
ace08c3c 3852 goto err_unmap;
963118ee 3853 nchan = retval;
3137553d
JS		 3854 }
3855
3856 if ((cy_next_channel + nchan) > NR_PORTS) {
3857 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
3858 "channels are available. Change NR_PORTS in "
3859 "cyclades.c and recompile kernel.\n");
3860 goto err_unmap;
3861 }
3862 /* fill the next cy_card structure available */
3863 for (card_no = 0; card_no < NR_CARDS; card_no++) {
3864 if (cy_card[card_no].base_addr == NULL)
3865 break;
3866 }
3867 if (card_no == NR_CARDS) { /* no more cy_cards available */
3868 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
3869 "more cards can be used. Change NR_CARDS in "
3870 "cyclades.c and recompile kernel.\n");
3871 goto err_unmap;
3872 }
3873
3874 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
3875 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
3876 /* allocate IRQ */
3877 retval = request_irq(irq, cyy_interrupt,
3878 IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]);
3879 if (retval) {
3880 dev_err(&pdev->dev, "could not allocate IRQ\n");
3881 goto err_unmap;
58936d8d 3882 }
963118ee 3883 cy_card[card_no].num_chips = nchan / CyPORTS_PER_CHIP;
3137553d 3884 } else {
f0eefdc3
JS		 3885 struct FIRM_ID __iomem *firm_id = addr2 + ID_ADDRESS;
3886 struct ZFW_CTRL __iomem *zfw_ctrl;
3887
3888 zfw_ctrl = addr2 + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3889
101b8159
JS		 3890 cy_card[card_no].hw_ver = mailbox;
3891 cy_card[card_no].num_chips = (unsigned int)-1;
f0eefdc3 3892 cy_card[card_no].board_ctrl = &zfw_ctrl->board_ctrl;
02f1175c 3893#ifdef CONFIG_CYZ_INTR
58936d8d 3894 /* allocate IRQ only if board has an IRQ */
3137553d
JS		 3895 if (irq != 0 && irq != 255) {
3896 retval = request_irq(irq, cyz_interrupt,
58936d8d 3897 IRQF_SHARED, "Cyclades-Z",
3137553d 3898 &cy_card[card_no]);
58936d8d 3899 if (retval) {
21719191 3900 dev_err(&pdev->dev, "could not allocate IRQ\n");
3137553d 3901 goto err_unmap;
02f1175c 3902 }
58936d8d 3903 }
02f1175c 3904#endif /* CONFIG_CYZ_INTR */
3137553d 3905 }
02f1175c 3906
3137553d
JS		 3907 /* set cy_card */
3908 cy_card[card_no].base_addr = addr2;
97e87f8e 3909 cy_card[card_no].ctl_addr.p9050 = addr0;
3137553d
JS		 3910 cy_card[card_no].irq = irq;
3911 cy_card[card_no].bus_index = 1;
3912 cy_card[card_no].first_line = cy_next_channel;
963118ee 3913 cy_card[card_no].nports = nchan;
3137553d
JS		 3914 retval = cy_init_card(&cy_card[card_no]);
3915 if (retval)
3916 goto err_null;
58936d8d 3917
3137553d 3918 pci_set_drvdata(pdev, &cy_card[card_no]);
58936d8d 3919
3137553d
JS		 3920 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
3921 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
3922 /* enable interrupts in the PCI interface */
3923 plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
3924 switch (plx_ver) {
3925 case PLX_9050:
3137553d
JS		 3926 cy_writeb(addr0 + 0x4c, 0x43);
3927 break;
3928
3929 case PLX_9060:
3930 case PLX_9080:
3931 default: /* Old boards, use PLX_9060 */
97e87f8e
JS		 3932 {
3933 struct RUNTIME_9060 __iomem *ctl_addr = addr0;
3934 plx_init(pdev, irq, ctl_addr);
3935 cy_writew(&ctl_addr->intr_ctrl_stat,
3936 readw(&ctl_addr->intr_ctrl_stat) | 0x0900);
3137553d
JS		 3937 break;
3938 }
97e87f8e 3939 }
58936d8d
JS		 3940 }
3941
3137553d
JS		 3942 dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
3943 "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
3944 for (i = cy_next_channel; i < cy_next_channel + nchan; i++)
3945 tty_register_device(cy_serial_driver, i, &pdev->dev);
3946 cy_next_channel += nchan;
3947
58936d8d 3948 return 0;
3137553d
JS		 3949err_null:
3950 cy_card[card_no].base_addr = NULL;
3951 free_irq(irq, &cy_card[card_no]);
3952err_unmap:
24e6fd4c 3953 iounmap(addr0);
3137553d 3954 if (addr2)
24e6fd4c 3955 iounmap(addr2);
3137553d
JS		 3956err_reg:
3957 pci_release_regions(pdev);
3958err_dis:
3959 pci_disable_device(pdev);
3960err:
3961 return retval;
58936d8d 3962}
58936d8d 3963
6747cd93 3964static void __devexit cy_pci_remove(struct pci_dev *pdev)
58936d8d 3965{
38d09093 3966 struct cyclades_card *cinfo = pci_get_drvdata(pdev);
f3851e73 3967 unsigned int i;
38d09093 3968
85c93fa9 3969 /* non-Z with old PLX */
2693f485 3970 if (!cy_is_Z(cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
c2ad4c75 3971 PLX_9050)
97e87f8e 3972 cy_writeb(cinfo->ctl_addr.p9050 + 0x4c, 0);
85c93fa9
JS		 3973 else
3974#ifndef CONFIG_CYZ_INTR
2693f485 3975 if (!cy_is_Z(cinfo))
85c93fa9 3976#endif
97e87f8e
JS		 3977 cy_writew(&cinfo->ctl_addr.p9060->intr_ctrl_stat,
3978 readw(&cinfo->ctl_addr.p9060->intr_ctrl_stat) &
3979 ~0x0900);
85c93fa9 3980
24e6fd4c 3981 iounmap(cinfo->base_addr);
97e87f8e
JS		 3982 if (cinfo->ctl_addr.p9050)
3983 iounmap(cinfo->ctl_addr.p9050);
38d09093
JS		 3984 if (cinfo->irq
3985#ifndef CONFIG_CYZ_INTR
2693f485 3986 && !cy_is_Z(cinfo)
38d09093
JS		 3987#endif /* CONFIG_CYZ_INTR */
3988 )
3989 free_irq(cinfo->irq, cinfo);
3990 pci_release_regions(pdev);
3991
3992 cinfo->base_addr = NULL;
6ad1ccc1
JS		 3993 for (i = cinfo->first_line; i < cinfo->first_line +
3994 cinfo->nports; i++)
3995 tty_unregister_device(cy_serial_driver, i);
dd025c0c
JS		 3996 cinfo->nports = 0;
3997 kfree(cinfo->ports);
38d09093
JS		 3998}
3999
6747cd93
JS		 4000static struct pci_driver cy_pci_driver = {
4001 .name = "cyclades",
4002 .id_table = cy_pci_dev_id,
4003 .probe = cy_pci_probe,
4004 .remove = __devexit_p(cy_pci_remove)
4005};
4006#endif
4007
444697d6 4008static int cyclades_proc_show(struct seq_file *m, void *v)
1da177e4 4009{
02f1175c 4010 struct cyclades_port *info;
dd025c0c 4011 unsigned int i, j;
02f1175c
JS		 4012 __u32 cur_jifs = jiffies;
4013
444697d6 4014 seq_puts(m, "Dev TimeOpen BytesOut IdleOut BytesIn "
02f1175c
JS		 4015 "IdleIn Overruns Ldisc\n");
4016
02f1175c 4017 /* Output one line for each known port */
dd025c0c
JS		 4018 for (i = 0; i < NR_CARDS; i++)
4019 for (j = 0; j < cy_card[i].nports; j++) {
4020 info = &cy_card[i].ports[j];
4021
d13549f8
JS		 4022 if (info->port.count) {
4023 /* XXX is the ldisc num worth this? */
4024 struct tty_struct *tty;
4025 struct tty_ldisc *ld;
4026 int num = 0;
4027 tty = tty_port_tty_get(&info->port);
4028 if (tty) {
4029 ld = tty_ldisc_ref(tty);
4030 if (ld) {
4031 num = ld->ops->num;
4032 tty_ldisc_deref(ld);
4033 }
4034 tty_kref_put(tty);
4035 }
444697d6 4036 seq_printf(m, "%3d %8lu %10lu %8lu "
d13549f8 4037 "%10lu %8lu %9lu %6d\n", info->line,
dd025c0c
JS		 4038 (cur_jifs - info->idle_stats.in_use) /
4039 HZ, info->idle_stats.xmit_bytes,
4040 (cur_jifs - info->idle_stats.xmit_idle)/
4041 HZ, info->idle_stats.recv_bytes,
4042 (cur_jifs - info->idle_stats.recv_idle)/
4043 HZ, info->idle_stats.overruns,
d13549f8
JS		 4044 num);
4045 } else
444697d6 4046 seq_printf(m, "%3d %8lu %10lu %8lu "
dd025c0c
JS		 4047 "%10lu %8lu %9lu %6ld\n",
4048 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
02f1175c 4049 }
444697d6
AD		 4050 return 0;
4051}
4052
4053static int cyclades_proc_open(struct inode *inode, struct file *file)
4054{
4055 return single_open(file, cyclades_proc_show, NULL);
1da177e4
LT		 4056}
4057
444697d6
AD		 4058static const struct file_operations cyclades_proc_fops = {
4059 .owner = THIS_MODULE,
4060 .open = cyclades_proc_open,
4061 .read = seq_read,
4062 .llseek = seq_lseek,
4063 .release = single_release,
4064};
4065
1da177e4
LT		 4066/* The serial driver boot-time initialization code!
4067 Hardware I/O ports are mapped to character special devices on a
4068 first found, first allocated manner. That is, this code searches
4069 for Cyclom cards in the system. As each is found, it is probed
4070 to discover how many chips (and thus how many ports) are present.
4071 These ports are mapped to the tty ports 32 and upward in monotonic
4072 fashion. If an 8-port card is replaced with a 16-port card, the
4073 port mapping on a following card will shift.
4074
4075 This approach is different from what is used in the other serial
4076 device driver because the Cyclom is more properly a multiplexer,
4077 not just an aggregation of serial ports on one card.
4078
4079 If there are more cards with more ports than have been
4080 statically allocated above, a warning is printed and the
4081 extra ports are ignored.
4082 */
4083
b68e31d0 4084static const struct tty_operations cy_ops = {
02f1175c
JS		 4085 .open = cy_open,
4086 .close = cy_close,
4087 .write = cy_write,
4088 .put_char = cy_put_char,
4089 .flush_chars = cy_flush_chars,
4090 .write_room = cy_write_room,
4091 .chars_in_buffer = cy_chars_in_buffer,
4092 .flush_buffer = cy_flush_buffer,
4093 .ioctl = cy_ioctl,
4094 .throttle = cy_throttle,
4095 .unthrottle = cy_unthrottle,
4096 .set_termios = cy_set_termios,
4097 .stop = cy_stop,
4098 .start = cy_start,
4099 .hangup = cy_hangup,
4100 .break_ctl = cy_break,
4101 .wait_until_sent = cy_wait_until_sent,
02f1175c
JS		 4102 .tiocmget = cy_tiocmget,
4103 .tiocmset = cy_tiocmset,
444697d6 4104 .proc_fops = &cyclades_proc_fops,
1da177e4
LT		 4105};
4106
02f1175c 4107static int __init cy_init(void)
1da177e4 4108{
dd025c0c 4109 unsigned int nboards;
9dacf3b2 4110 int retval = -ENOMEM;
02f1175c
JS		 4111
4112 cy_serial_driver = alloc_tty_driver(NR_PORTS);
4113 if (!cy_serial_driver)
9dacf3b2 4114 goto err;
21719191
JS		 4115
4116 printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
4117 __DATE__, __TIME__);
02f1175c
JS		 4118
4119 /* Initialize the tty_driver structure */
4120
4121 cy_serial_driver->owner = THIS_MODULE;
4122 cy_serial_driver->driver_name = "cyclades";
4123 cy_serial_driver->name = "ttyC";
4124 cy_serial_driver->major = CYCLADES_MAJOR;
4125 cy_serial_driver->minor_start = 0;
4126 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
4127 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
4128 cy_serial_driver->init_termios = tty_std_termios;
4129 cy_serial_driver->init_termios.c_cflag =
4130 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
6ad1ccc1 4131 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
02f1175c
JS		 4132 tty_set_operations(cy_serial_driver, &cy_ops);
4133
9dacf3b2
JS		 4134 retval = tty_register_driver(cy_serial_driver);
4135 if (retval) {
4136 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
4137 goto err_frtty;
4138 }
02f1175c 4139
02f1175c
JS		 4140 /* the code below is responsible to find the boards. Each different
4141 type of board has its own detection routine. If a board is found,
4142 the next cy_card structure available is set by the detection
4143 routine. These functions are responsible for checking the
4144 availability of cy_card and cy_port data structures and updating
4145 the cy_next_channel. */
4146
4147 /* look for isa boards */
14a55a67 4148 nboards = cy_detect_isa();
02f1175c 4149
6747cd93 4150#ifdef CONFIG_PCI
02f1175c 4151 /* look for pci boards */
6747cd93 4152 retval = pci_register_driver(&cy_pci_driver);
d941ea7d
JJ		 4153 if (retval && !nboards) {
4154 tty_unregister_driver(cy_serial_driver);
4155 goto err_frtty;
4156 }
6747cd93 4157#endif
9dacf3b2
JS		 4158
4159 return 0;
9dacf3b2
JS		 4160err_frtty:
4161 put_tty_driver(cy_serial_driver);
4162err:
4163 return retval;
02f1175c 4164} /* cy_init */
1da177e4 4165
02f1175c 4166static void __exit cy_cleanup_module(void)
1da177e4 4167{
dd025c0c 4168 struct cyclades_card *card;
65f76a82 4169 unsigned int i, e1;
1da177e4
LT		 4170
4171#ifndef CONFIG_CYZ_INTR
b7050906 4172 del_timer_sync(&cyz_timerlist);
1da177e4
LT		 4173#endif /* CONFIG_CYZ_INTR */
4174
15ed6cc0
AC		 4175 e1 = tty_unregister_driver(cy_serial_driver);
4176 if (e1)
21719191
JS		 4177 printk(KERN_ERR "failed to unregister Cyclades serial "
4178 "driver(%d)\n", e1);
1da177e4 4179
6747cd93
JS		 4180#ifdef CONFIG_PCI
4181 pci_unregister_driver(&cy_pci_driver);
4182#endif
4183
02f1175c 4184 for (i = 0; i < NR_CARDS; i++) {
dd025c0c
JS		 4185 card = &cy_card[i];
4186 if (card->base_addr) {
85c93fa9 4187 /* clear interrupt */
dd025c0c
JS		 4188 cy_writeb(card->base_addr + Cy_ClrIntr, 0);
4189 iounmap(card->base_addr);
97e87f8e
JS		 4190 if (card->ctl_addr.p9050)
4191 iounmap(card->ctl_addr.p9050);
dd025c0c 4192 if (card->irq
1da177e4 4193#ifndef CONFIG_CYZ_INTR
2693f485 4194 && !cy_is_Z(card)
1da177e4 4195#endif /* CONFIG_CYZ_INTR */
02f1175c 4196 )
dd025c0c 4197 free_irq(card->irq, card);
65f76a82 4198 for (e1 = card->first_line; e1 < card->first_line +
dd025c0c 4199 card->nports; e1++)
6ad1ccc1 4200 tty_unregister_device(cy_serial_driver, e1);
dd025c0c 4201 kfree(card->ports);
02f1175c
JS		 4202 }
4203 }
f2462bfe
JS		 4204
4205 put_tty_driver(cy_serial_driver);
1da177e4
LT		 4206} /* cy_cleanup_module */
4207
4208module_init(cy_init);
4209module_exit(cy_cleanup_module);
4210
4211MODULE_LICENSE("GPL");
c8e1693a 4212MODULE_VERSION(CY_VERSION);
9f56fad7 4213MODULE_ALIAS_CHARDEV_MAJOR(CYCLADES_MAJOR);
Linux 6.x block layer and io_uring tree(s)