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[PATCH] fuse: fix bitfield race
[linux-2.6-block.git] / drivers / net / cs89x0.c
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1da177e4
LT		 1/* cs89x0.c: A Crystal Semiconductor (Now Cirrus Logic) CS89[02]0
2 * driver for linux.
3 */
4
5/*
6 Written 1996 by Russell Nelson, with reference to skeleton.c
7 written 1993-1994 by Donald Becker.
8
9 This software may be used and distributed according to the terms
10 of the GNU General Public License, incorporated herein by reference.
11
12 The author may be reached at nelson@crynwr.com, Crynwr
13 Software, 521 Pleasant Valley Rd., Potsdam, NY 13676
14
15 Changelog:
16
17 Mike Cruse : mcruse@cti-ltd.com
18 : Changes for Linux 2.0 compatibility.
19 : Added dev_id parameter in net_interrupt(),
20 : request_irq() and free_irq(). Just NULL for now.
21
22 Mike Cruse : Added MOD_INC_USE_COUNT and MOD_DEC_USE_COUNT macros
23 : in net_open() and net_close() so kerneld would know
24 : that the module is in use and wouldn't eject the
25 : driver prematurely.
26
27 Mike Cruse : Rewrote init_module() and cleanup_module using 8390.c
28 : as an example. Disabled autoprobing in init_module(),
29 : not a good thing to do to other devices while Linux
30 : is running from all accounts.
31
32 Russ Nelson : Jul 13 1998. Added RxOnly DMA support.
33
34 Melody Lee : Aug 10 1999. Changes for Linux 2.2.5 compatibility.
35 : email: ethernet@crystal.cirrus.com
36
37 Alan Cox : Removed 1.2 support, added 2.1 extra counters.
38
39 Andrew Morton : andrewm@uow.edu.au
40 : Kernel 2.3.48
41 : Handle kmalloc() failures
42 : Other resource allocation fixes
43 : Add SMP locks
44 : Integrate Russ Nelson's ALLOW_DMA functionality back in.
45 : If ALLOW_DMA is true, make DMA runtime selectable
46 : Folded in changes from Cirrus (Melody Lee
47 : <klee@crystal.cirrus.com>)
48 : Don't call netif_wake_queue() in net_send_packet()
49 : Fixed an out-of-mem bug in dma_rx()
50 : Updated Documentation/networking/cs89x0.txt
51
52 Andrew Morton : andrewm@uow.edu.au / Kernel 2.3.99-pre1
53 : Use skb_reserve to longword align IP header (two places)
54 : Remove a delay loop from dma_rx()
55 : Replace '100' with HZ
56 : Clean up a couple of skb API abuses
57 : Added 'cs89x0_dma=N' kernel boot option
58 : Correctly initialise lp->lock in non-module compile
59
60 Andrew Morton : andrewm@uow.edu.au / Kernel 2.3.99-pre4-1
61 : MOD_INC/DEC race fix (see
62 : http://www.uwsg.indiana.edu/hypermail/linux/kernel/0003.3/1532.html)
63
64 Andrew Morton : andrewm@uow.edu.au / Kernel 2.4.0-test7-pre2
65 : Enhanced EEPROM support to cover more devices,
66 : abstracted IRQ mapping to support CONFIG_ARCH_CLPS7500 arch
67 : (Jason Gunthorpe <jgg@ualberta.ca>)
68
69 Andrew Morton : Kernel 2.4.0-test11-pre4
70 : Use dev->name in request_*() (Andrey Panin)
71 : Fix an error-path memleak in init_module()
72 : Preserve return value from request_irq()
73 : Fix type of `media' module parm (Keith Owens)
74 : Use SET_MODULE_OWNER()
75 : Tidied up strange request_irq() abuse in net_open().
76
77 Andrew Morton : Kernel 2.4.3-pre1
78 : Request correct number of pages for DMA (Hugh Dickens)
79 : Select PP_ChipID _after_ unregister_netdev in cleanup_module()
80 : because unregister_netdev() calls get_stats.
81 : Make `version[]' __initdata
82 : Uninlined the read/write reg/word functions.
83
84 Oskar Schirmer : oskar@scara.com
85 : HiCO.SH4 (superh) support added (irq#1, cs89x0_media=)
86
87 Deepak Saxena : dsaxena@plexity.net
88 : Intel IXDP2x01 (XScale ixp2x00 NPU) platform support
89
032874e4
LB		 90 Dmitry Pervushin : dpervushin@ru.mvista.com
91 : PNX010X platform support
92
9c878967
DS		 93 Deepak Saxena : dsaxena@plexity.net
94 : Intel IXDP2351 platform support
95
1da177e4
LT		 96*/
97
98/* Always include 'config.h' first in case the user wants to turn on
99 or override something. */
100#include <linux/config.h>
101#include <linux/module.h>
102
103/*
104 * Set this to zero to disable DMA code
105 *
106 * Note that even if DMA is turned off we still support the 'dma' and 'use_dma'
107 * module options so we don't break any startup scripts.
108 */
91e1c463 109#ifndef CONFIG_ISA_DMA_API
1da177e4
LT		 110#define ALLOW_DMA 0
111#else
112#define ALLOW_DMA 1
113#endif
114
115/*
116 * Set this to zero to remove all the debug statements via
117 * dead code elimination
118 */
119#define DEBUGGING 1
120
121/*
122 Sources:
123
124 Crynwr packet driver epktisa.
125
126 Crystal Semiconductor data sheets.
127
128*/
129
130#include <linux/errno.h>
131#include <linux/netdevice.h>
132#include <linux/etherdevice.h>
133#include <linux/kernel.h>
134#include <linux/types.h>
135#include <linux/fcntl.h>
136#include <linux/interrupt.h>
137#include <linux/ioport.h>
138#include <linux/in.h>
139#include <linux/skbuff.h>
140#include <linux/slab.h>
141#include <linux/spinlock.h>
142#include <linux/string.h>
143#include <linux/init.h>
144#include <linux/bitops.h>
145#include <linux/delay.h>
146
147#include <asm/system.h>
148#include <asm/io.h>
7625d483 149#include <asm/irq.h>
1da177e4
LT		 150#if ALLOW_DMA
151#include <asm/dma.h>
152#endif
153
154#include "cs89x0.h"
155
156static char version[] __initdata =
157"cs89x0.c: v2.4.3-pre1 Russell Nelson <nelson@crynwr.com>, Andrew Morton <andrewm@uow.edu.au>\n";
158
159#define DRV_NAME "cs89x0"
160
161/* First, a few definitions that the brave might change.
162 A zero-terminated list of I/O addresses to be probed. Some special flags..
163 Addr & 1 = Read back the address port, look for signature and reset
164 the page window before probing
165 Addr & 3 = Reset the page window and probe
166 The CLPS eval board has the Cirrus chip at 0x80090300, in ARM IO space,
167 but it is possible that a Cirrus board could be plugged into the ISA
168 slots. */
169/* The cs8900 has 4 IRQ pins, software selectable. cs8900_irq_map maps
170 them to system IRQ numbers. This mapping is card specific and is set to
171 the configuration of the Cirrus Eval board for this chip. */
172#ifdef CONFIG_ARCH_CLPS7500
173static unsigned int netcard_portlist[] __initdata =
174 { 0x80090303, 0x300, 0x320, 0x340, 0x360, 0x200, 0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x2e0, 0};
175static unsigned int cs8900_irq_map[] = {12,0,0,0};
176#elif defined(CONFIG_SH_HICOSH4)
177static unsigned int netcard_portlist[] __initdata =
178 { 0x0300, 0};
179static unsigned int cs8900_irq_map[] = {1,0,0,0};
9c878967
DS		 180#elif defined(CONFIG_MACH_IXDP2351)
181static unsigned int netcard_portlist[] __initdata = {IXDP2351_VIRT_CS8900_BASE, 0};
182static unsigned int cs8900_irq_map[] = {IRQ_IXDP2351_CS8900, 0, 0, 0};
183#include <asm/irq.h>
1da177e4
LT		 184#elif defined(CONFIG_ARCH_IXDP2X01)
185#include <asm/irq.h>
186static unsigned int netcard_portlist[] __initdata = {IXDP2X01_CS8900_VIRT_BASE, 0};
187static unsigned int cs8900_irq_map[] = {IRQ_IXDP2X01_CS8900, 0, 0, 0};
277cb103 188#elif defined(CONFIG_ARCH_PNX010X)
0dd3c781 189#include <asm/irq.h>
190#include <asm/arch/gpio.h>
191#define CIRRUS_DEFAULT_BASE IO_ADDRESS(EXT_STATIC2_s0_BASE + 0x200000) /* = Physical address 0x48200000 */
192#define CIRRUS_DEFAULT_IRQ VH_INTC_INT_NUM_CASCADED_INTERRUPT_1 /* Event inputs bank 1 - ID 35/bit 3 */
193static unsigned int netcard_portlist[] __initdata = {CIRRUS_DEFAULT_BASE, 0};
194static unsigned int cs8900_irq_map[] = {CIRRUS_DEFAULT_IRQ, 0, 0, 0};
1da177e4
LT		 195#else
196static unsigned int netcard_portlist[] __initdata =
197 { 0x300, 0x320, 0x340, 0x360, 0x200, 0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x2e0, 0};
198static unsigned int cs8900_irq_map[] = {10,11,12,5};
199#endif
200
201#if DEBUGGING
202static unsigned int net_debug = DEBUGGING;
203#else
204#define net_debug 0 /* gcc will remove all the debug code for us */
205#endif
206
207/* The number of low I/O ports used by the ethercard. */
208#define NETCARD_IO_EXTENT 16
209
210/* we allow the user to override various values normally set in the EEPROM */
211#define FORCE_RJ45 0x0001 /* pick one of these three */
212#define FORCE_AUI 0x0002
213#define FORCE_BNC 0x0004
214
215#define FORCE_AUTO 0x0010 /* pick one of these three */
216#define FORCE_HALF 0x0020
217#define FORCE_FULL 0x0030
218
219/* Information that need to be kept for each board. */
220struct net_local {
221 struct net_device_stats stats;
222 int chip_type; /* one of: CS8900, CS8920, CS8920M */
223 char chip_revision; /* revision letter of the chip ('A'...) */
224 int send_cmd; /* the proper send command: TX_NOW, TX_AFTER_381, or TX_AFTER_ALL */
225 int auto_neg_cnf; /* auto-negotiation word from EEPROM */
226 int adapter_cnf; /* adapter configuration from EEPROM */
227 int isa_config; /* ISA configuration from EEPROM */
228 int irq_map; /* IRQ map from EEPROM */
229 int rx_mode; /* what mode are we in? 0, RX_MULTCAST_ACCEPT, or RX_ALL_ACCEPT */
230 int curr_rx_cfg; /* a copy of PP_RxCFG */
231 int linectl; /* either 0 or LOW_RX_SQUELCH, depending on configuration. */
232 int send_underrun; /* keep track of how many underruns in a row we get */
233 int force; /* force various values; see FORCE* above. */
234 spinlock_t lock;
235#if ALLOW_DMA
236 int use_dma; /* Flag: we're using dma */
237 int dma; /* DMA channel */
238 int dmasize; /* 16 or 64 */
239 unsigned char *dma_buff; /* points to the beginning of the buffer */
240 unsigned char *end_dma_buff; /* points to the end of the buffer */
241 unsigned char *rx_dma_ptr; /* points to the next packet */
242#endif
243};
244
245/* Index to functions, as function prototypes. */
246
247static int cs89x0_probe1(struct net_device *dev, int ioaddr, int modular);
248static int net_open(struct net_device *dev);
249static int net_send_packet(struct sk_buff *skb, struct net_device *dev);
250static irqreturn_t net_interrupt(int irq, void *dev_id, struct pt_regs *regs);
251static void set_multicast_list(struct net_device *dev);
252static void net_timeout(struct net_device *dev);
253static void net_rx(struct net_device *dev);
254static int net_close(struct net_device *dev);
255static struct net_device_stats *net_get_stats(struct net_device *dev);
256static void reset_chip(struct net_device *dev);
257static int get_eeprom_data(struct net_device *dev, int off, int len, int *buffer);
258static int get_eeprom_cksum(int off, int len, int *buffer);
259static int set_mac_address(struct net_device *dev, void *addr);
260static void count_rx_errors(int status, struct net_local *lp);
6f519165
DS		 261#ifdef CONFIG_NET_POLL_CONTROLLER
262static void net_poll_controller(struct net_device *dev);
263#endif
1da177e4
LT		 264#if ALLOW_DMA
265static void get_dma_channel(struct net_device *dev);
266static void release_dma_buff(struct net_local *lp);
267#endif
268
269/* Example routines you must write ;->. */
270#define tx_done(dev) 1
271
272/*
273 * Permit 'cs89x0_dma=N' in the kernel boot environment
274 */
275#if !defined(MODULE) && (ALLOW_DMA != 0)
276static int g_cs89x0_dma;
277
278static int __init dma_fn(char *str)
279{
280 g_cs89x0_dma = simple_strtol(str,NULL,0);
281 return 1;
282}
283
284__setup("cs89x0_dma=", dma_fn);
285#endif /* !defined(MODULE) && (ALLOW_DMA != 0) */
286
287#ifndef MODULE
288static int g_cs89x0_media__force;
289
290static int __init media_fn(char *str)
291{
292 if (!strcmp(str, "rj45")) g_cs89x0_media__force = FORCE_RJ45;
293 else if (!strcmp(str, "aui")) g_cs89x0_media__force = FORCE_AUI;
294 else if (!strcmp(str, "bnc")) g_cs89x0_media__force = FORCE_BNC;
295 return 1;
296}
297
298__setup("cs89x0_media=", media_fn);
299
300\f
301/* Check for a network adaptor of this type, and return '0' iff one exists.
302 If dev->base_addr == 0, probe all likely locations.
303 If dev->base_addr == 1, always return failure.
304 If dev->base_addr == 2, allocate space for the device and return success
305 (detachable devices only).
306 Return 0 on success.
307 */
308
309struct net_device * __init cs89x0_probe(int unit)
310{
311 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
312 unsigned *port;
313 int err = 0;
314 int irq;
315 int io;
316
317 if (!dev)
318 return ERR_PTR(-ENODEV);
319
320 sprintf(dev->name, "eth%d", unit);
321 netdev_boot_setup_check(dev);
322 io = dev->base_addr;
323 irq = dev->irq;
324
325 if (net_debug)
326 printk("cs89x0:cs89x0_probe(0x%x)\n", io);
327
328 if (io > 0x1ff) { /* Check a single specified location. */
329 err = cs89x0_probe1(dev, io, 0);
330 } else if (io != 0) { /* Don't probe at all. */
331 err = -ENXIO;
332 } else {
333 for (port = netcard_portlist; *port; port++) {
334 if (cs89x0_probe1(dev, *port, 0) == 0)
335 break;
336 dev->irq = irq;
337 }
338 if (!*port)
339 err = -ENODEV;
340 }
341 if (err)
342 goto out;
1da177e4 343 return dev;
1da177e4
LT		 344out:
345 free_netdev(dev);
346 printk(KERN_WARNING "cs89x0: no cs8900 or cs8920 detected. Be sure to disable PnP with SETUP\n");
347 return ERR_PTR(err);
348}
349#endif
350
9c878967
DS		 351#if defined(CONFIG_MACH_IXDP2351)
352static u16
353readword(unsigned long base_addr, int portno)
354{
355 return __raw_readw(base_addr + (portno << 1));
356}
357
358static void
359writeword(unsigned long base_addr, int portno, u16 value)
360{
361 __raw_writew(value, base_addr + (portno << 1));
362}
363#elif defined(CONFIG_ARCH_IXDP2X01)
a07f0dbe 364static u16
3b68d70d
LB		 365readword(unsigned long base_addr, int portno)
366{
a07f0dbe 367 return __raw_readl(base_addr + (portno << 1));
3b68d70d
LB		 368}
369
370static void
a07f0dbe 371writeword(unsigned long base_addr, int portno, u16 value)
3b68d70d 372{
a07f0dbe 373 __raw_writel(value, base_addr + (portno << 1));
3b68d70d 374}
580d7b8c 375#elif defined(CONFIG_ARCH_PNX010X)
a07f0dbe 376static u16
3b68d70d
LB		 377readword(unsigned long base_addr, int portno)
378{
379 return inw(base_addr + (portno << 1));
380}
381
382static void
a07f0dbe 383writeword(unsigned long base_addr, int portno, u16 value)
3b68d70d
LB		 384{
385 outw(value, base_addr + (portno << 1));
386}
387#else
a07f0dbe 388static u16
0d5affcf 389readword(unsigned long base_addr, int portno)
1da177e4 390{
0d5affcf 391 return inw(base_addr + portno);
1da177e4
LT		 392}
393
394static void
a07f0dbe 395writeword(unsigned long base_addr, int portno, u16 value)
1da177e4 396{
0d5affcf 397 outw(value, base_addr + portno);
1da177e4 398}
3b68d70d 399#endif
1da177e4 400
084f746a
LB		 401static void
402readwords(unsigned long base_addr, int portno, void *buf, int length)
403{
404 u8 *buf8 = (u8 *)buf;
405
406 do {
a07f0dbe 407 u16 tmp16;
084f746a 408
a07f0dbe
LB		 409 tmp16 = readword(base_addr, portno);
410 *buf8++ = (u8)tmp16;
411 *buf8++ = (u8)(tmp16 >> 8);
084f746a
LB		 412 } while (--length);
413}
414
415static void
416writewords(unsigned long base_addr, int portno, void *buf, int length)
417{
418 u8 *buf8 = (u8 *)buf;
419
420 do {
a07f0dbe 421 u16 tmp16;
084f746a 422
a07f0dbe
LB		 423 tmp16 = *buf8++;
424 tmp16 |= (*buf8++) << 8;
425 writeword(base_addr, portno, tmp16);
084f746a
LB		 426 } while (--length);
427}
428
a07f0dbe
LB		 429static u16
430readreg(struct net_device *dev, u16 regno)
1da177e4 431{
3eaa5e7d
LB		 432 writeword(dev->base_addr, ADD_PORT, regno);
433 return readword(dev->base_addr, DATA_PORT);
1da177e4
LT		 434}
435
436static void
a07f0dbe 437writereg(struct net_device *dev, u16 regno, u16 value)
1da177e4 438{
3eaa5e7d
LB		 439 writeword(dev->base_addr, ADD_PORT, regno);
440 writeword(dev->base_addr, DATA_PORT, value);
1da177e4
LT		 441}
442
443static int __init
444wait_eeprom_ready(struct net_device *dev)
445{
446 int timeout = jiffies;
447 /* check to see if the EEPROM is ready, a timeout is used -
448 just in case EEPROM is ready when SI_BUSY in the
449 PP_SelfST is clear */
450 while(readreg(dev, PP_SelfST) & SI_BUSY)
451 if (jiffies - timeout >= 40)
452 return -1;
453 return 0;
454}
455
456static int __init
457get_eeprom_data(struct net_device *dev, int off, int len, int *buffer)
458{
459 int i;
460
461 if (net_debug > 3) printk("EEPROM data from %x for %x:\n",off,len);
462 for (i = 0; i < len; i++) {
463 if (wait_eeprom_ready(dev) < 0) return -1;
464 /* Now send the EEPROM read command and EEPROM location to read */
465 writereg(dev, PP_EECMD, (off + i) | EEPROM_READ_CMD);
466 if (wait_eeprom_ready(dev) < 0) return -1;
467 buffer[i] = readreg(dev, PP_EEData);
468 if (net_debug > 3) printk("%04x ", buffer[i]);
469 }
470 if (net_debug > 3) printk("\n");
471 return 0;
472}
473
474static int __init
475get_eeprom_cksum(int off, int len, int *buffer)
476{
477 int i, cksum;
478
479 cksum = 0;
480 for (i = 0; i < len; i++)
481 cksum += buffer[i];
482 cksum &= 0xffff;
483 if (cksum == 0)
484 return 0;
485 return -1;
486}
487
6f519165
DS		 488#ifdef CONFIG_NET_POLL_CONTROLLER
489/*
490 * Polling receive - used by netconsole and other diagnostic tools
491 * to allow network i/o with interrupts disabled.
492 */
493static void net_poll_controller(struct net_device *dev)
494{
495 disable_irq(dev->irq);
496 net_interrupt(dev->irq, dev, NULL);
497 enable_irq(dev->irq);
498}
499#endif
500
1da177e4
LT		 501/* This is the real probe routine. Linux has a history of friendly device
502 probes on the ISA bus. A good device probes avoids doing writes, and
503 verifies that the correct device exists and functions.
504 Return 0 on success.
505 */
506
507static int __init
508cs89x0_probe1(struct net_device *dev, int ioaddr, int modular)
509{
510 struct net_local *lp = netdev_priv(dev);
511 static unsigned version_printed;
512 int i;
01bdc033 513 int tmp;
1da177e4
LT		 514 unsigned rev_type = 0;
515 int eeprom_buff[CHKSUM_LEN];
516 int retval;
517
518 SET_MODULE_OWNER(dev);
519 /* Initialize the device structure. */
520 if (!modular) {
521 memset(lp, 0, sizeof(*lp));
522 spin_lock_init(&lp->lock);
523#ifndef MODULE
524#if ALLOW_DMA
525 if (g_cs89x0_dma) {
526 lp->use_dma = 1;
527 lp->dma = g_cs89x0_dma;
528 lp->dmasize = 16; /* Could make this an option... */
529 }
530#endif
531 lp->force = g_cs89x0_media__force;
532#endif
533 }
534
277cb103 535#ifdef CONFIG_ARCH_PNX010X
0dd3c781 536 initialize_ebi();
537
538 /* Map GPIO registers for the pins connected to the CS8900a. */
539 if (map_cirrus_gpio() < 0)
540 return -ENODEV;
541
542 reset_cirrus();
543
544 /* Map event-router registers. */
545 if (map_event_router() < 0)
546 return -ENODEV;
547
548 enable_cirrus_irq();
549
550 unmap_cirrus_gpio();
551 unmap_event_router();
552
553 dev->base_addr = ioaddr;
554
555 for (i = 0 ; i < 3 ; i++)
556 readreg(dev, 0);
557#endif
558
1da177e4
LT		 559 /* Grab the region so we can find another board if autoIRQ fails. */
560 /* WTF is going on here? */
561 if (!request_region(ioaddr & ~3, NETCARD_IO_EXTENT, DRV_NAME)) {
562 printk(KERN_ERR "%s: request_region(0x%x, 0x%x) failed\n",
563 DRV_NAME, ioaddr, NETCARD_IO_EXTENT);
564 retval = -EBUSY;
565 goto out1;
566 }
567
568#ifdef CONFIG_SH_HICOSH4
569 /* truely reset the chip */
fc8c7d79
LB		 570 writeword(ioaddr, ADD_PORT, 0x0114);
571 writeword(ioaddr, DATA_PORT, 0x0040);
1da177e4
LT		 572#endif
573
574 /* if they give us an odd I/O address, then do ONE write to
575 the address port, to get it back to address zero, where we
576 expect to find the EISA signature word. An IO with a base of 0x3
577 will skip the test for the ADD_PORT. */
578 if (ioaddr & 1) {
579 if (net_debug > 1)
580 printk(KERN_INFO "%s: odd ioaddr 0x%x\n", dev->name, ioaddr);
581 if ((ioaddr & 2) != 2)
fc8c7d79 582 if ((readword(ioaddr & ~3, ADD_PORT) & ADD_MASK) != ADD_SIG) {
1da177e4 583 printk(KERN_ERR "%s: bad signature 0x%x\n",
fc8c7d79 584 dev->name, readword(ioaddr & ~3, ADD_PORT));
1da177e4
LT		 585 retval = -ENODEV;
586 goto out2;
587 }
588 }
fc8c7d79
LB		 589 printk(KERN_DEBUG "PP_addr at %x[%x]: 0x%x\n",
590 ioaddr, ADD_PORT, readword(ioaddr, ADD_PORT));
1da177e4
LT		 591
592 ioaddr &= ~3;
fc8c7d79 593 writeword(ioaddr, ADD_PORT, PP_ChipID);
1da177e4 594
fc8c7d79 595 tmp = readword(ioaddr, DATA_PORT);
01bdc033 596 if (tmp != CHIP_EISA_ID_SIG) {
fc8c7d79 597 printk(KERN_DEBUG "%s: incorrect signature at %x[%x]: 0x%x!="
01bdc033 598 CHIP_EISA_ID_SIG_STR "\n",
fc8c7d79 599 dev->name, ioaddr, DATA_PORT, tmp);
1da177e4
LT		 600 retval = -ENODEV;
601 goto out2;
602 }
603
604 /* Fill in the 'dev' fields. */
605 dev->base_addr = ioaddr;
606
607 /* get the chip type */
608 rev_type = readreg(dev, PRODUCT_ID_ADD);
609 lp->chip_type = rev_type &~ REVISON_BITS;
610 lp->chip_revision = ((rev_type & REVISON_BITS) >> 8) + 'A';
611
612 /* Check the chip type and revision in order to set the correct send command
613 CS8920 revision C and CS8900 revision F can use the faster send. */
614 lp->send_cmd = TX_AFTER_381;
615 if (lp->chip_type == CS8900 && lp->chip_revision >= 'F')
616 lp->send_cmd = TX_NOW;
617 if (lp->chip_type != CS8900 && lp->chip_revision >= 'C')
618 lp->send_cmd = TX_NOW;
619
620 if (net_debug && version_printed++ == 0)
621 printk(version);
622
623 printk(KERN_INFO "%s: cs89%c0%s rev %c found at %#3lx ",
624 dev->name,
625 lp->chip_type==CS8900?'0':'2',
626 lp->chip_type==CS8920M?"M":"",
627 lp->chip_revision,
628 dev->base_addr);
629
630 reset_chip(dev);
631
632 /* Here we read the current configuration of the chip. If there
633 is no Extended EEPROM then the idea is to not disturb the chip
634 configuration, it should have been correctly setup by automatic
635 EEPROM read on reset. So, if the chip says it read the EEPROM
636 the driver will always do *something* instead of complain that
637 adapter_cnf is 0. */
638
639#ifdef CONFIG_SH_HICOSH4
640 if (1) {
641 /* For the HiCO.SH4 board, things are different: we don't
642 have EEPROM, but there is some data in flash, so we go
643 get it there directly (MAC). */
644 __u16 *confd;
645 short cnt;
646 if (((* (volatile __u32 *) 0xa0013ff0) & 0x00ffffff)
647 == 0x006c3000) {
648 confd = (__u16*) 0xa0013fc0;
649 } else {
650 confd = (__u16*) 0xa001ffc0;
651 }
652 cnt = (*confd++ & 0x00ff) >> 1;
653 while (--cnt > 0) {
654 __u16 j = *confd++;
655
656 switch (j & 0x0fff) {
657 case PP_IA:
658 for (i = 0; i < ETH_ALEN/2; i++) {
659 dev->dev_addr[i*2] = confd[i] & 0xFF;
660 dev->dev_addr[i*2+1] = confd[i] >> 8;
661 }
662 break;
663 }
664 j = (j >> 12) + 1;
665 confd += j;
666 cnt -= j;
667 }
668 } else
669#endif
670
671 if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) ==
672 (EEPROM_OK|EEPROM_PRESENT)) {
673 /* Load the MAC. */
674 for (i=0; i < ETH_ALEN/2; i++) {
675 unsigned int Addr;
676 Addr = readreg(dev, PP_IA+i*2);
677 dev->dev_addr[i*2] = Addr & 0xFF;
678 dev->dev_addr[i*2+1] = Addr >> 8;
679 }
680
681 /* Load the Adapter Configuration.
682 Note: Barring any more specific information from some
683 other source (ie EEPROM+Schematics), we would not know
684 how to operate a 10Base2 interface on the AUI port.
685 However, since we do read the status of HCB1 and use
686 settings that always result in calls to control_dc_dc(dev,0)
687 a BNC interface should work if the enable pin
688 (dc/dc converter) is on HCB1. It will be called AUI
689 however. */
690
691 lp->adapter_cnf = 0;
692 i = readreg(dev, PP_LineCTL);
693 /* Preserve the setting of the HCB1 pin. */
694 if ((i & (HCB1 | HCB1_ENBL)) == (HCB1 | HCB1_ENBL))
695 lp->adapter_cnf |= A_CNF_DC_DC_POLARITY;
696 /* Save the sqelch bit */
697 if ((i & LOW_RX_SQUELCH) == LOW_RX_SQUELCH)
698 lp->adapter_cnf |= A_CNF_EXTND_10B_2 | A_CNF_LOW_RX_SQUELCH;
699 /* Check if the card is in 10Base-t only mode */
700 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == 0)
701 lp->adapter_cnf |= A_CNF_10B_T | A_CNF_MEDIA_10B_T;
702 /* Check if the card is in AUI only mode */
703 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUI_ONLY)
704 lp->adapter_cnf |= A_CNF_AUI | A_CNF_MEDIA_AUI;
705 /* Check if the card is in Auto mode. */
706 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUTO_AUI_10BASET)
707 lp->adapter_cnf |= A_CNF_AUI | A_CNF_10B_T |
708 A_CNF_MEDIA_AUI | A_CNF_MEDIA_10B_T | A_CNF_MEDIA_AUTO;
709
710 if (net_debug > 1)
711 printk(KERN_INFO "%s: PP_LineCTL=0x%x, adapter_cnf=0x%x\n",
712 dev->name, i, lp->adapter_cnf);
713
714 /* IRQ. Other chips already probe, see below. */
715 if (lp->chip_type == CS8900)
716 lp->isa_config = readreg(dev, PP_CS8900_ISAINT) & INT_NO_MASK;
717
718 printk( "[Cirrus EEPROM] ");
719 }
720
721 printk("\n");
722
723 /* First check to see if an EEPROM is attached. */
724#ifdef CONFIG_SH_HICOSH4 /* no EEPROM on HiCO, don't hazzle with it here */
725 if (1) {
726 printk(KERN_NOTICE "cs89x0: No EEPROM on HiCO.SH4\n");
727 } else
728#endif
729 if ((readreg(dev, PP_SelfST) & EEPROM_PRESENT) == 0)
730 printk(KERN_WARNING "cs89x0: No EEPROM, relying on command line....\n");
731 else if (get_eeprom_data(dev, START_EEPROM_DATA,CHKSUM_LEN,eeprom_buff) < 0) {
732 printk(KERN_WARNING "\ncs89x0: EEPROM read failed, relying on command line.\n");
733 } else if (get_eeprom_cksum(START_EEPROM_DATA,CHKSUM_LEN,eeprom_buff) < 0) {
734 /* Check if the chip was able to read its own configuration starting
735 at 0 in the EEPROM*/
736 if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) !=
737 (EEPROM_OK|EEPROM_PRESENT))
738 printk(KERN_WARNING "cs89x0: Extended EEPROM checksum bad and no Cirrus EEPROM, relying on command line\n");
739
740 } else {
741 /* This reads an extended EEPROM that is not documented
742 in the CS8900 datasheet. */
743
744 /* get transmission control word but keep the autonegotiation bits */
745 if (!lp->auto_neg_cnf) lp->auto_neg_cnf = eeprom_buff[AUTO_NEG_CNF_OFFSET/2];
746 /* Store adapter configuration */
747 if (!lp->adapter_cnf) lp->adapter_cnf = eeprom_buff[ADAPTER_CNF_OFFSET/2];
748 /* Store ISA configuration */
749 lp->isa_config = eeprom_buff[ISA_CNF_OFFSET/2];
750 dev->mem_start = eeprom_buff[PACKET_PAGE_OFFSET/2] << 8;
751
752 /* eeprom_buff has 32-bit ints, so we can't just memcpy it */
753 /* store the initial memory base address */
754 for (i = 0; i < ETH_ALEN/2; i++) {
755 dev->dev_addr[i*2] = eeprom_buff[i];
756 dev->dev_addr[i*2+1] = eeprom_buff[i] >> 8;
757 }
758 if (net_debug > 1)
759 printk(KERN_DEBUG "%s: new adapter_cnf: 0x%x\n",
760 dev->name, lp->adapter_cnf);
761 }
762
763 /* allow them to force multiple transceivers. If they force multiple, autosense */
764 {
765 int count = 0;
766 if (lp->force & FORCE_RJ45) {lp->adapter_cnf |= A_CNF_10B_T; count++; }
767 if (lp->force & FORCE_AUI) {lp->adapter_cnf |= A_CNF_AUI; count++; }
768 if (lp->force & FORCE_BNC) {lp->adapter_cnf |= A_CNF_10B_2; count++; }
769 if (count > 1) {lp->adapter_cnf |= A_CNF_MEDIA_AUTO; }
770 else if (lp->force & FORCE_RJ45){lp->adapter_cnf |= A_CNF_MEDIA_10B_T; }
771 else if (lp->force & FORCE_AUI) {lp->adapter_cnf |= A_CNF_MEDIA_AUI; }
772 else if (lp->force & FORCE_BNC) {lp->adapter_cnf |= A_CNF_MEDIA_10B_2; }
773 }
774
775 if (net_debug > 1)
776 printk(KERN_DEBUG "%s: after force 0x%x, adapter_cnf=0x%x\n",
777 dev->name, lp->force, lp->adapter_cnf);
778
779 /* FIXME: We don't let you set dc-dc polarity or low RX squelch from the command line: add it here */
780
781 /* FIXME: We don't let you set the IMM bit from the command line: add it to lp->auto_neg_cnf here */
782
783 /* FIXME: we don't set the Ethernet address on the command line. Use
784 ifconfig IFACE hw ether AABBCCDDEEFF */
785
786 printk(KERN_INFO "cs89x0 media %s%s%s",
787 (lp->adapter_cnf & A_CNF_10B_T)?"RJ-45,":"",
788 (lp->adapter_cnf & A_CNF_AUI)?"AUI,":"",
789 (lp->adapter_cnf & A_CNF_10B_2)?"BNC,":"");
790
791 lp->irq_map = 0xffff;
792
793 /* If this is a CS8900 then no pnp soft */
794 if (lp->chip_type != CS8900 &&
795 /* Check if the ISA IRQ has been set */
796 (i = readreg(dev, PP_CS8920_ISAINT) & 0xff,
797 (i != 0 && i < CS8920_NO_INTS))) {
798 if (!dev->irq)
799 dev->irq = i;
800 } else {
801 i = lp->isa_config & INT_NO_MASK;
802 if (lp->chip_type == CS8900) {
9c878967 803#if defined(CONFIG_MACH_IXDP2351) || defined(CONFIG_ARCH_IXDP2X01) || defined(CONFIG_ARCH_PNX010X)
1da177e4
LT		 804 i = cs8900_irq_map[0];
805#else
806 /* Translate the IRQ using the IRQ mapping table. */
807 if (i >= sizeof(cs8900_irq_map)/sizeof(cs8900_irq_map[0]))
808 printk("\ncs89x0: invalid ISA interrupt number %d\n", i);
809 else
810 i = cs8900_irq_map[i];
811
812 lp->irq_map = CS8900_IRQ_MAP; /* fixed IRQ map for CS8900 */
813 } else {
814 int irq_map_buff[IRQ_MAP_LEN/2];
815
816 if (get_eeprom_data(dev, IRQ_MAP_EEPROM_DATA,
817 IRQ_MAP_LEN/2,
818 irq_map_buff) >= 0) {
819 if ((irq_map_buff[0] & 0xff) == PNP_IRQ_FRMT)
820 lp->irq_map = (irq_map_buff[0]>>8) | (irq_map_buff[1] << 8);
821 }
822#endif
823 }
824 if (!dev->irq)
825 dev->irq = i;
826 }
827
828 printk(" IRQ %d", dev->irq);
829
830#if ALLOW_DMA
831 if (lp->use_dma) {
832 get_dma_channel(dev);
833 printk(", DMA %d", dev->dma);
834 }
835 else
836#endif
837 {
838 printk(", programmed I/O");
839 }
840
841 /* print the ethernet address. */
842 printk(", MAC");
843 for (i = 0; i < ETH_ALEN; i++)
844 {
845 printk("%c%02x", i ? ':' : ' ', dev->dev_addr[i]);
846 }
847
848 dev->open = net_open;
849 dev->stop = net_close;
850 dev->tx_timeout = net_timeout;
851 dev->watchdog_timeo = HZ;
852 dev->hard_start_xmit = net_send_packet;
853 dev->get_stats = net_get_stats;
854 dev->set_multicast_list = set_multicast_list;
855 dev->set_mac_address = set_mac_address;
6f519165
DS		 856#ifdef CONFIG_NET_POLL_CONTROLLER
857 dev->poll_controller = net_poll_controller;
858#endif
1da177e4
LT		 859
860 printk("\n");
861 if (net_debug)
862 printk("cs89x0_probe1() successful\n");
b1fc5505 863
864 retval = register_netdev(dev);
865 if (retval)
866 goto out3;
1da177e4 867 return 0;
b1fc5505 868out3:
fc8c7d79 869 writeword(dev->base_addr, ADD_PORT, PP_ChipID);
1da177e4
LT		 870out2:
871 release_region(ioaddr & ~3, NETCARD_IO_EXTENT);
872out1:
873 return retval;
874}
875
876\f
877/*********************************
878 * This page contains DMA routines
879**********************************/
880
881#if ALLOW_DMA
882
883#define dma_page_eq(ptr1, ptr2) ((long)(ptr1)>>17 == (long)(ptr2)>>17)
884
885static void
886get_dma_channel(struct net_device *dev)
887{
888 struct net_local *lp = netdev_priv(dev);
889
890 if (lp->dma) {
891 dev->dma = lp->dma;
892 lp->isa_config |= ISA_RxDMA;
893 } else {
894 if ((lp->isa_config & ANY_ISA_DMA) == 0)
895 return;
896 dev->dma = lp->isa_config & DMA_NO_MASK;
897 if (lp->chip_type == CS8900)
898 dev->dma += 5;
899 if (dev->dma < 5 || dev->dma > 7) {
900 lp->isa_config &= ~ANY_ISA_DMA;
901 return;
902 }
903 }
904 return;
905}
906
907static void
908write_dma(struct net_device *dev, int chip_type, int dma)
909{
910 struct net_local *lp = netdev_priv(dev);
911 if ((lp->isa_config & ANY_ISA_DMA) == 0)
912 return;
913 if (chip_type == CS8900) {
914 writereg(dev, PP_CS8900_ISADMA, dma-5);
915 } else {
916 writereg(dev, PP_CS8920_ISADMA, dma);
917 }
918}
919
920static void
921set_dma_cfg(struct net_device *dev)
922{
923 struct net_local *lp = netdev_priv(dev);
924
925 if (lp->use_dma) {
926 if ((lp->isa_config & ANY_ISA_DMA) == 0) {
927 if (net_debug > 3)
928 printk("set_dma_cfg(): no DMA\n");
929 return;
930 }
931 if (lp->isa_config & ISA_RxDMA) {
932 lp->curr_rx_cfg |= RX_DMA_ONLY;
933 if (net_debug > 3)
934 printk("set_dma_cfg(): RX_DMA_ONLY\n");
935 } else {
936 lp->curr_rx_cfg |= AUTO_RX_DMA; /* not that we support it... */
937 if (net_debug > 3)
938 printk("set_dma_cfg(): AUTO_RX_DMA\n");
939 }
940 }
941}
942
943static int
944dma_bufcfg(struct net_device *dev)
945{
946 struct net_local *lp = netdev_priv(dev);
947 if (lp->use_dma)
948 return (lp->isa_config & ANY_ISA_DMA)? RX_DMA_ENBL : 0;
949 else
950 return 0;
951}
952
953static int
954dma_busctl(struct net_device *dev)
955{
956 int retval = 0;
957 struct net_local *lp = netdev_priv(dev);
958 if (lp->use_dma) {
959 if (lp->isa_config & ANY_ISA_DMA)
960 retval |= RESET_RX_DMA; /* Reset the DMA pointer */
961 if (lp->isa_config & DMA_BURST)
962 retval |= DMA_BURST_MODE; /* Does ISA config specify DMA burst ? */
963 if (lp->dmasize == 64)
964 retval |= RX_DMA_SIZE_64K; /* did they ask for 64K? */
965 retval |= MEMORY_ON; /* we need memory enabled to use DMA. */
966 }
967 return retval;
968}
969
970static void
971dma_rx(struct net_device *dev)
972{
973 struct net_local *lp = netdev_priv(dev);
974 struct sk_buff *skb;
975 int status, length;
976 unsigned char *bp = lp->rx_dma_ptr;
977
978 status = bp[0] + (bp[1]<<8);
979 length = bp[2] + (bp[3]<<8);
980 bp += 4;
981 if (net_debug > 5) {
982 printk( "%s: receiving DMA packet at %lx, status %x, length %x\n",
983 dev->name, (unsigned long)bp, status, length);
984 }
985 if ((status & RX_OK) == 0) {
986 count_rx_errors(status, lp);
987 goto skip_this_frame;
988 }
989
990 /* Malloc up new buffer. */
991 skb = dev_alloc_skb(length + 2);
992 if (skb == NULL) {
993 if (net_debug) /* I don't think we want to do this to a stressed system */
994 printk("%s: Memory squeeze, dropping packet.\n", dev->name);
995 lp->stats.rx_dropped++;
996
997 /* AKPM: advance bp to the next frame */
998skip_this_frame:
999 bp += (length + 3) & ~3;
1000 if (bp >= lp->end_dma_buff) bp -= lp->dmasize*1024;
1001 lp->rx_dma_ptr = bp;
1002 return;
1003 }
1004 skb_reserve(skb, 2); /* longword align L3 header */
1005 skb->dev = dev;
1006
1007 if (bp + length > lp->end_dma_buff) {
1008 int semi_cnt = lp->end_dma_buff - bp;
1009 memcpy(skb_put(skb,semi_cnt), bp, semi_cnt);
1010 memcpy(skb_put(skb,length - semi_cnt), lp->dma_buff,
1011 length - semi_cnt);
1012 } else {
1013 memcpy(skb_put(skb,length), bp, length);
1014 }
1015 bp += (length + 3) & ~3;
1016 if (bp >= lp->end_dma_buff) bp -= lp->dmasize*1024;
1017 lp->rx_dma_ptr = bp;
1018
1019 if (net_debug > 3) {
1020 printk( "%s: received %d byte DMA packet of type %x\n",
1021 dev->name, length,
1022 (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]);
1023 }
1024 skb->protocol=eth_type_trans(skb,dev);
1025 netif_rx(skb);
1026 dev->last_rx = jiffies;
1027 lp->stats.rx_packets++;
1028 lp->stats.rx_bytes += length;
1029}
1030
1031#endif /* ALLOW_DMA */
1032
1033void __init reset_chip(struct net_device *dev)
1034{
9c878967 1035#if !defined(CONFIG_MACH_IXDP2351) && !defined(CONFIG_ARCH_IXDP2X01)
1da177e4
LT		 1036 struct net_local *lp = netdev_priv(dev);
1037 int ioaddr = dev->base_addr;
1038#endif
1039 int reset_start_time;
1040
1041 writereg(dev, PP_SelfCTL, readreg(dev, PP_SelfCTL) | POWER_ON_RESET);
1042
1043 /* wait 30 ms */
1044 msleep(30);
1045
9c878967 1046#if !defined(CONFIG_MACH_IXDP2351) && !defined(CONFIG_ARCH_IXDP2X01)
1da177e4
LT		 1047 if (lp->chip_type != CS8900) {
1048 /* Hardware problem requires PNP registers to be reconfigured after a reset */
fc8c7d79 1049 writeword(ioaddr, ADD_PORT, PP_CS8920_ISAINT);
1da177e4
LT		 1050 outb(dev->irq, ioaddr + DATA_PORT);
1051 outb(0, ioaddr + DATA_PORT + 1);
1052
fc8c7d79 1053 writeword(ioaddr, ADD_PORT, PP_CS8920_ISAMemB);
1da177e4
LT		 1054 outb((dev->mem_start >> 16) & 0xff, ioaddr + DATA_PORT);
1055 outb((dev->mem_start >> 8) & 0xff, ioaddr + DATA_PORT + 1);
1056 }
1057#endif /* IXDP2x01 */
1058
1059 /* Wait until the chip is reset */
1060 reset_start_time = jiffies;
1061 while( (readreg(dev, PP_SelfST) & INIT_DONE) == 0 && jiffies - reset_start_time < 2)
1062 ;
1063}
1064
1065\f
1066static void
1067control_dc_dc(struct net_device *dev, int on_not_off)
1068{
1069 struct net_local *lp = netdev_priv(dev);
1070 unsigned int selfcontrol;
1071 int timenow = jiffies;
1072 /* control the DC to DC convertor in the SelfControl register.
1073 Note: This is hooked up to a general purpose pin, might not
1074 always be a DC to DC convertor. */
1075
1076 selfcontrol = HCB1_ENBL; /* Enable the HCB1 bit as an output */
1077 if (((lp->adapter_cnf & A_CNF_DC_DC_POLARITY) != 0) ^ on_not_off)
1078 selfcontrol |= HCB1;
1079 else
1080 selfcontrol &= ~HCB1;
1081 writereg(dev, PP_SelfCTL, selfcontrol);
1082
1083 /* Wait for the DC/DC converter to power up - 500ms */
1084 while (jiffies - timenow < HZ)
1085 ;
1086}
1087
1088#define DETECTED_NONE 0
1089#define DETECTED_RJ45H 1
1090#define DETECTED_RJ45F 2
1091#define DETECTED_AUI 3
1092#define DETECTED_BNC 4
1093
1094static int
1095detect_tp(struct net_device *dev)
1096{
1097 struct net_local *lp = netdev_priv(dev);
1098 int timenow = jiffies;
1099 int fdx;
1100
1101 if (net_debug > 1) printk("%s: Attempting TP\n", dev->name);
1102
1103 /* If connected to another full duplex capable 10-Base-T card the link pulses
1104 seem to be lost when the auto detect bit in the LineCTL is set.
1105 To overcome this the auto detect bit will be cleared whilst testing the
1106 10-Base-T interface. This would not be necessary for the sparrow chip but
1107 is simpler to do it anyway. */
1108 writereg(dev, PP_LineCTL, lp->linectl &~ AUI_ONLY);
1109 control_dc_dc(dev, 0);
1110
1111 /* Delay for the hardware to work out if the TP cable is present - 150ms */
1112 for (timenow = jiffies; jiffies - timenow < 15; )
1113 ;
1114 if ((readreg(dev, PP_LineST) & LINK_OK) == 0)
1115 return DETECTED_NONE;
1116
1117 if (lp->chip_type == CS8900) {
1118 switch (lp->force & 0xf0) {
1119#if 0
1120 case FORCE_AUTO:
1121 printk("%s: cs8900 doesn't autonegotiate\n",dev->name);
1122 return DETECTED_NONE;
1123#endif
1124 /* CS8900 doesn't support AUTO, change to HALF*/
1125 case FORCE_AUTO:
1126 lp->force &= ~FORCE_AUTO;
1127 lp->force |= FORCE_HALF;
1128 break;
1129 case FORCE_HALF:
1130 break;
1131 case FORCE_FULL:
1132 writereg(dev, PP_TestCTL, readreg(dev, PP_TestCTL) | FDX_8900);
1133 break;
1134 }
1135 fdx = readreg(dev, PP_TestCTL) & FDX_8900;
1136 } else {
1137 switch (lp->force & 0xf0) {
1138 case FORCE_AUTO:
1139 lp->auto_neg_cnf = AUTO_NEG_ENABLE;
1140 break;
1141 case FORCE_HALF:
1142 lp->auto_neg_cnf = 0;
1143 break;
1144 case FORCE_FULL:
1145 lp->auto_neg_cnf = RE_NEG_NOW | ALLOW_FDX;
1146 break;
1147 }
1148
1149 writereg(dev, PP_AutoNegCTL, lp->auto_neg_cnf & AUTO_NEG_MASK);
1150
1151 if ((lp->auto_neg_cnf & AUTO_NEG_BITS) == AUTO_NEG_ENABLE) {
1152 printk(KERN_INFO "%s: negotiating duplex...\n",dev->name);
1153 while (readreg(dev, PP_AutoNegST) & AUTO_NEG_BUSY) {
1154 if (jiffies - timenow > 4000) {
1155 printk(KERN_ERR "**** Full / half duplex auto-negotiation timed out ****\n");
1156 break;
1157 }
1158 }
1159 }
1160 fdx = readreg(dev, PP_AutoNegST) & FDX_ACTIVE;
1161 }
1162 if (fdx)
1163 return DETECTED_RJ45F;
1164 else
1165 return DETECTED_RJ45H;
1166}
1167
1168/* send a test packet - return true if carrier bits are ok */
1169static int
1170send_test_pkt(struct net_device *dev)
1171{
1172 char test_packet[] = { 0,0,0,0,0,0, 0,0,0,0,0,0,
1173 0, 46, /* A 46 in network order */
1174 0, 0, /* DSAP=0 & SSAP=0 fields */
1175 0xf3, 0 /* Control (Test Req + P bit set) */ };
1176 long timenow = jiffies;
1177
1178 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_TX_ON);
1179
1180 memcpy(test_packet, dev->dev_addr, ETH_ALEN);
1181 memcpy(test_packet+ETH_ALEN, dev->dev_addr, ETH_ALEN);
1182
974dffc2
LB		 1183 writeword(dev->base_addr, TX_CMD_PORT, TX_AFTER_ALL);
1184 writeword(dev->base_addr, TX_LEN_PORT, ETH_ZLEN);
1da177e4
LT		 1185
1186 /* Test to see if the chip has allocated memory for the packet */
1187 while (jiffies - timenow < 5)
1188 if (readreg(dev, PP_BusST) & READY_FOR_TX_NOW)
1189 break;
1190 if (jiffies - timenow >= 5)
1191 return 0; /* this shouldn't happen */
1192
1193 /* Write the contents of the packet */
084f746a 1194 writewords(dev->base_addr, TX_FRAME_PORT,test_packet,(ETH_ZLEN+1) >>1);
1da177e4
LT		 1195
1196 if (net_debug > 1) printk("Sending test packet ");
1197 /* wait a couple of jiffies for packet to be received */
1198 for (timenow = jiffies; jiffies - timenow < 3; )
1199 ;
1200 if ((readreg(dev, PP_TxEvent) & TX_SEND_OK_BITS) == TX_OK) {
1201 if (net_debug > 1) printk("succeeded\n");
1202 return 1;
1203 }
1204 if (net_debug > 1) printk("failed\n");
1205 return 0;
1206}
1207
1208
1209static int
1210detect_aui(struct net_device *dev)
1211{
1212 struct net_local *lp = netdev_priv(dev);
1213
1214 if (net_debug > 1) printk("%s: Attempting AUI\n", dev->name);
1215 control_dc_dc(dev, 0);
1216
1217 writereg(dev, PP_LineCTL, (lp->linectl &~ AUTO_AUI_10BASET) | AUI_ONLY);
1218
1219 if (send_test_pkt(dev))
1220 return DETECTED_AUI;
1221 else
1222 return DETECTED_NONE;
1223}
1224
1225static int
1226detect_bnc(struct net_device *dev)
1227{
1228 struct net_local *lp = netdev_priv(dev);
1229
1230 if (net_debug > 1) printk("%s: Attempting BNC\n", dev->name);
1231 control_dc_dc(dev, 1);
1232
1233 writereg(dev, PP_LineCTL, (lp->linectl &~ AUTO_AUI_10BASET) | AUI_ONLY);
1234
1235 if (send_test_pkt(dev))
1236 return DETECTED_BNC;
1237 else
1238 return DETECTED_NONE;
1239}
1240
1241\f
1242static void
1243write_irq(struct net_device *dev, int chip_type, int irq)
1244{
1245 int i;
1246
1247 if (chip_type == CS8900) {
1248 /* Search the mapping table for the corresponding IRQ pin. */
1249 for (i = 0; i != sizeof(cs8900_irq_map)/sizeof(cs8900_irq_map[0]); i++)
1250 if (cs8900_irq_map[i] == irq)
1251 break;
1252 /* Not found */
1253 if (i == sizeof(cs8900_irq_map)/sizeof(cs8900_irq_map[0]))
1254 i = 3;
1255 writereg(dev, PP_CS8900_ISAINT, i);
1256 } else {
1257 writereg(dev, PP_CS8920_ISAINT, irq);
1258 }
1259}
1260
1261/* Open/initialize the board. This is called (in the current kernel)
1262 sometime after booting when the 'ifconfig' program is run.
1263
1264 This routine should set everything up anew at each open, even
1265 registers that "should" only need to be set once at boot, so that
1266 there is non-reboot way to recover if something goes wrong.
1267 */
1268
1269/* AKPM: do we need to do any locking here? */
1270
1271static int
1272net_open(struct net_device *dev)
1273{
1274 struct net_local *lp = netdev_priv(dev);
1275 int result = 0;
1276 int i;
1277 int ret;
1278
277cb103 1279#if !defined(CONFIG_SH_HICOSH4) && !defined(CONFIG_ARCH_PNX010X) /* uses irq#1, so this won't work */
1da177e4
LT		 1280 if (dev->irq < 2) {
1281 /* Allow interrupts to be generated by the chip */
1282/* Cirrus' release had this: */
1283#if 0
1284 writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ );
1285#endif
1286/* And 2.3.47 had this: */
1287 writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
1288
1289 for (i = 2; i < CS8920_NO_INTS; i++) {
1290 if ((1 << i) & lp->irq_map) {
1291 if (request_irq(i, net_interrupt, 0, dev->name, dev) == 0) {
1292 dev->irq = i;
1293 write_irq(dev, lp->chip_type, i);
1294 /* writereg(dev, PP_BufCFG, GENERATE_SW_INTERRUPT); */
1295 break;
1296 }
1297 }
1298 }
1299
1300 if (i >= CS8920_NO_INTS) {
1301 writereg(dev, PP_BusCTL, 0); /* disable interrupts. */
1302 printk(KERN_ERR "cs89x0: can't get an interrupt\n");
1303 ret = -EAGAIN;
1304 goto bad_out;
1305 }
1306 }
1307 else
1308#endif
1309 {
9c878967 1310#if !defined(CONFIG_MACH_IXDP2351) && !defined(CONFIG_ARCH_IXDP2X01) && !defined(CONFIG_ARCH_PNX010X)
1da177e4
LT		 1311 if (((1 << dev->irq) & lp->irq_map) == 0) {
1312 printk(KERN_ERR "%s: IRQ %d is not in our map of allowable IRQs, which is %x\n",
1313 dev->name, dev->irq, lp->irq_map);
1314 ret = -EAGAIN;
1315 goto bad_out;
1316 }
1317#endif
1318/* FIXME: Cirrus' release had this: */
1319 writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ );
1320/* And 2.3.47 had this: */
1321#if 0
1322 writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
1323#endif
1324 write_irq(dev, lp->chip_type, dev->irq);
1325 ret = request_irq(dev->irq, &net_interrupt, 0, dev->name, dev);
1326 if (ret) {
1327 if (net_debug)
1328 printk(KERN_DEBUG "cs89x0: request_irq(%d) failed\n", dev->irq);
1329 goto bad_out;
1330 }
1331 }
1332
1333#if ALLOW_DMA
1334 if (lp->use_dma) {
1335 if (lp->isa_config & ANY_ISA_DMA) {
1336 unsigned long flags;
1337 lp->dma_buff = (unsigned char *)__get_dma_pages(GFP_KERNEL,
1338 get_order(lp->dmasize * 1024));
1339
1340 if (!lp->dma_buff) {
1341 printk(KERN_ERR "%s: cannot get %dK memory for DMA\n", dev->name, lp->dmasize);
1342 goto release_irq;
1343 }
1344 if (net_debug > 1) {
1345 printk( "%s: dma %lx %lx\n",
1346 dev->name,
1347 (unsigned long)lp->dma_buff,
1348 (unsigned long)isa_virt_to_bus(lp->dma_buff));
1349 }
1350 if ((unsigned long) lp->dma_buff >= MAX_DMA_ADDRESS ||
1351 !dma_page_eq(lp->dma_buff, lp->dma_buff+lp->dmasize*1024-1)) {
1352 printk(KERN_ERR "%s: not usable as DMA buffer\n", dev->name);
1353 goto release_irq;
1354 }
1355 memset(lp->dma_buff, 0, lp->dmasize * 1024); /* Why? */
1356 if (request_dma(dev->dma, dev->name)) {
1357 printk(KERN_ERR "%s: cannot get dma channel %d\n", dev->name, dev->dma);
1358 goto release_irq;
1359 }
1360 write_dma(dev, lp->chip_type, dev->dma);
1361 lp->rx_dma_ptr = lp->dma_buff;
1362 lp->end_dma_buff = lp->dma_buff + lp->dmasize*1024;
1363 spin_lock_irqsave(&lp->lock, flags);
1364 disable_dma(dev->dma);
1365 clear_dma_ff(dev->dma);
1366 set_dma_mode(dev->dma, 0x14); /* auto_init as well */
1367 set_dma_addr(dev->dma, isa_virt_to_bus(lp->dma_buff));
1368 set_dma_count(dev->dma, lp->dmasize*1024);
1369 enable_dma(dev->dma);
1370 spin_unlock_irqrestore(&lp->lock, flags);
1371 }
1372 }
1373#endif /* ALLOW_DMA */
1374
1375 /* set the Ethernet address */
1376 for (i=0; i < ETH_ALEN/2; i++)
1377 writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8));
1378
1379 /* while we're testing the interface, leave interrupts disabled */
1380 writereg(dev, PP_BusCTL, MEMORY_ON);
1381
1382 /* Set the LineCTL quintuplet based on adapter configuration read from EEPROM */
1383 if ((lp->adapter_cnf & A_CNF_EXTND_10B_2) && (lp->adapter_cnf & A_CNF_LOW_RX_SQUELCH))
1384 lp->linectl = LOW_RX_SQUELCH;
1385 else
1386 lp->linectl = 0;
1387
1388 /* check to make sure that they have the "right" hardware available */
1389 switch(lp->adapter_cnf & A_CNF_MEDIA_TYPE) {
1390 case A_CNF_MEDIA_10B_T: result = lp->adapter_cnf & A_CNF_10B_T; break;
1391 case A_CNF_MEDIA_AUI: result = lp->adapter_cnf & A_CNF_AUI; break;
1392 case A_CNF_MEDIA_10B_2: result = lp->adapter_cnf & A_CNF_10B_2; break;
1393 default: result = lp->adapter_cnf & (A_CNF_10B_T | A_CNF_AUI | A_CNF_10B_2);
1394 }
277cb103 1395#ifdef CONFIG_ARCH_PNX010X
0dd3c781 1396 result = A_CNF_10B_T;
1397#endif
1da177e4
LT		 1398 if (!result) {
1399 printk(KERN_ERR "%s: EEPROM is configured for unavailable media\n", dev->name);
1400 release_irq:
1401#if ALLOW_DMA
1402 release_dma_buff(lp);
1403#endif
1404 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) & ~(SERIAL_TX_ON | SERIAL_RX_ON));
1405 free_irq(dev->irq, dev);
1406 ret = -EAGAIN;
1407 goto bad_out;
1408 }
1409
1410 /* set the hardware to the configured choice */
1411 switch(lp->adapter_cnf & A_CNF_MEDIA_TYPE) {
1412 case A_CNF_MEDIA_10B_T:
1413 result = detect_tp(dev);
1414 if (result==DETECTED_NONE) {
1415 printk(KERN_WARNING "%s: 10Base-T (RJ-45) has no cable\n", dev->name);
1416 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1417 result = DETECTED_RJ45H; /* Yes! I don't care if I see a link pulse */
1418 }
1419 break;
1420 case A_CNF_MEDIA_AUI:
1421 result = detect_aui(dev);
1422 if (result==DETECTED_NONE) {
1423 printk(KERN_WARNING "%s: 10Base-5 (AUI) has no cable\n", dev->name);
1424 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1425 result = DETECTED_AUI; /* Yes! I don't care if I see a carrrier */
1426 }
1427 break;
1428 case A_CNF_MEDIA_10B_2:
1429 result = detect_bnc(dev);
1430 if (result==DETECTED_NONE) {
1431 printk(KERN_WARNING "%s: 10Base-2 (BNC) has no cable\n", dev->name);
1432 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1433 result = DETECTED_BNC; /* Yes! I don't care if I can xmit a packet */
1434 }
1435 break;
1436 case A_CNF_MEDIA_AUTO:
1437 writereg(dev, PP_LineCTL, lp->linectl | AUTO_AUI_10BASET);
1438 if (lp->adapter_cnf & A_CNF_10B_T)
1439 if ((result = detect_tp(dev)) != DETECTED_NONE)
1440 break;
1441 if (lp->adapter_cnf & A_CNF_AUI)
1442 if ((result = detect_aui(dev)) != DETECTED_NONE)
1443 break;
1444 if (lp->adapter_cnf & A_CNF_10B_2)
1445 if ((result = detect_bnc(dev)) != DETECTED_NONE)
1446 break;
1447 printk(KERN_ERR "%s: no media detected\n", dev->name);
1448 goto release_irq;
1449 }
1450 switch(result) {
1451 case DETECTED_NONE:
1452 printk(KERN_ERR "%s: no network cable attached to configured media\n", dev->name);
1453 goto release_irq;
1454 case DETECTED_RJ45H:
1455 printk(KERN_INFO "%s: using half-duplex 10Base-T (RJ-45)\n", dev->name);
1456 break;
1457 case DETECTED_RJ45F:
1458 printk(KERN_INFO "%s: using full-duplex 10Base-T (RJ-45)\n", dev->name);
1459 break;
1460 case DETECTED_AUI:
1461 printk(KERN_INFO "%s: using 10Base-5 (AUI)\n", dev->name);
1462 break;
1463 case DETECTED_BNC:
1464 printk(KERN_INFO "%s: using 10Base-2 (BNC)\n", dev->name);
1465 break;
1466 }
1467
1468 /* Turn on both receive and transmit operations */
1469 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_RX_ON | SERIAL_TX_ON);
1470
1471 /* Receive only error free packets addressed to this card */
1472 lp->rx_mode = 0;
1473 writereg(dev, PP_RxCTL, DEF_RX_ACCEPT);
1474
1475 lp->curr_rx_cfg = RX_OK_ENBL | RX_CRC_ERROR_ENBL;
1476
1477 if (lp->isa_config & STREAM_TRANSFER)
1478 lp->curr_rx_cfg |= RX_STREAM_ENBL;
1479#if ALLOW_DMA
1480 set_dma_cfg(dev);
1481#endif
1482 writereg(dev, PP_RxCFG, lp->curr_rx_cfg);
1483
1484 writereg(dev, PP_TxCFG, TX_LOST_CRS_ENBL | TX_SQE_ERROR_ENBL | TX_OK_ENBL |
1485 TX_LATE_COL_ENBL | TX_JBR_ENBL | TX_ANY_COL_ENBL | TX_16_COL_ENBL);
1486
1487 writereg(dev, PP_BufCFG, READY_FOR_TX_ENBL | RX_MISS_COUNT_OVRFLOW_ENBL |
1488#if ALLOW_DMA
1489 dma_bufcfg(dev) |
1490#endif
1491 TX_COL_COUNT_OVRFLOW_ENBL | TX_UNDERRUN_ENBL);
1492
1493 /* now that we've got our act together, enable everything */
1494 writereg(dev, PP_BusCTL, ENABLE_IRQ
1495 | (dev->mem_start?MEMORY_ON : 0) /* turn memory on */
1496#if ALLOW_DMA
1497 | dma_busctl(dev)
1498#endif
1499 );
1500 netif_start_queue(dev);
1501 if (net_debug > 1)
1502 printk("cs89x0: net_open() succeeded\n");
1503 return 0;
1504bad_out:
1505 return ret;
1506}
1507
1508static void net_timeout(struct net_device *dev)
1509{
1510 /* If we get here, some higher level has decided we are broken.
1511 There should really be a "kick me" function call instead. */
1512 if (net_debug > 0) printk("%s: transmit timed out, %s?\n", dev->name,
1513 tx_done(dev) ? "IRQ conflict ?" : "network cable problem");
1514 /* Try to restart the adaptor. */
1515 netif_wake_queue(dev);
1516}
1517
1518static int net_send_packet(struct sk_buff *skb, struct net_device *dev)
1519{
1520 struct net_local *lp = netdev_priv(dev);
1521
1522 if (net_debug > 3) {
1523 printk("%s: sent %d byte packet of type %x\n",
1524 dev->name, skb->len,
1525 (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]);
1526 }
1527
1528 /* keep the upload from being interrupted, since we
1529 ask the chip to start transmitting before the
1530 whole packet has been completely uploaded. */
1531
1532 spin_lock_irq(&lp->lock);
1533 netif_stop_queue(dev);
1534
1535 /* initiate a transmit sequence */
974dffc2
LB		 1536 writeword(dev->base_addr, TX_CMD_PORT, lp->send_cmd);
1537 writeword(dev->base_addr, TX_LEN_PORT, skb->len);
1da177e4
LT		 1538
1539 /* Test to see if the chip has allocated memory for the packet */
1540 if ((readreg(dev, PP_BusST) & READY_FOR_TX_NOW) == 0) {
1541 /*
1542 * Gasp! It hasn't. But that shouldn't happen since
1543 * we're waiting for TxOk, so return 1 and requeue this packet.
1544 */
1545
1546 spin_unlock_irq(&lp->lock);
1547 if (net_debug) printk("cs89x0: Tx buffer not free!\n");
1548 return 1;
1549 }
1550 /* Write the contents of the packet */
084f746a 1551 writewords(dev->base_addr, TX_FRAME_PORT,skb->data,(skb->len+1) >>1);
1da177e4 1552 spin_unlock_irq(&lp->lock);
e1699f50 1553 lp->stats.tx_bytes += skb->len;
1da177e4
LT		 1554 dev->trans_start = jiffies;
1555 dev_kfree_skb (skb);
1556
1557 /*
1558 * We DO NOT call netif_wake_queue() here.
1559 * We also DO NOT call netif_start_queue().
1560 *
1561 * Either of these would cause another bottom half run through
1562 * net_send_packet() before this packet has fully gone out. That causes
1563 * us to hit the "Gasp!" above and the send is rescheduled. it runs like
1564 * a dog. We just return and wait for the Tx completion interrupt handler
1565 * to restart the netdevice layer
1566 */
1567
1568 return 0;
1569}
1570\f
1571/* The typical workload of the driver:
1572 Handle the network interface interrupts. */
1573
1574static irqreturn_t net_interrupt(int irq, void *dev_id, struct pt_regs * regs)
1575{
1576 struct net_device *dev = dev_id;
1577 struct net_local *lp;
1578 int ioaddr, status;
1579 int handled = 0;
1580
1581 ioaddr = dev->base_addr;
1582 lp = netdev_priv(dev);
1583
1584 /* we MUST read all the events out of the ISQ, otherwise we'll never
1585 get interrupted again. As a consequence, we can't have any limit
1586 on the number of times we loop in the interrupt handler. The
1587 hardware guarantees that eventually we'll run out of events. Of
1588 course, if you're on a slow machine, and packets are arriving
1589 faster than you can read them off, you're screwed. Hasta la
1590 vista, baby! */
974dffc2 1591 while ((status = readword(dev->base_addr, ISQ_PORT))) {
1da177e4
LT		 1592 if (net_debug > 4)printk("%s: event=%04x\n", dev->name, status);
1593 handled = 1;
1594 switch(status & ISQ_EVENT_MASK) {
1595 case ISQ_RECEIVER_EVENT:
1596 /* Got a packet(s). */
1597 net_rx(dev);
1598 break;
1599 case ISQ_TRANSMITTER_EVENT:
1600 lp->stats.tx_packets++;
1601 netif_wake_queue(dev); /* Inform upper layers. */
1602 if ((status & ( TX_OK |
1603 TX_LOST_CRS |
1604 TX_SQE_ERROR |
1605 TX_LATE_COL |
1606 TX_16_COL)) != TX_OK) {
1607 if ((status & TX_OK) == 0) lp->stats.tx_errors++;
1608 if (status & TX_LOST_CRS) lp->stats.tx_carrier_errors++;
1609 if (status & TX_SQE_ERROR) lp->stats.tx_heartbeat_errors++;
1610 if (status & TX_LATE_COL) lp->stats.tx_window_errors++;
1611 if (status & TX_16_COL) lp->stats.tx_aborted_errors++;
1612 }
1613 break;
1614 case ISQ_BUFFER_EVENT:
1615 if (status & READY_FOR_TX) {
1616 /* we tried to transmit a packet earlier,
1617 but inexplicably ran out of buffers.
1618 That shouldn't happen since we only ever
1619 load one packet. Shrug. Do the right
1620 thing anyway. */
1621 netif_wake_queue(dev); /* Inform upper layers. */
1622 }
1623 if (status & TX_UNDERRUN) {
1624 if (net_debug > 0) printk("%s: transmit underrun\n", dev->name);
1625 lp->send_underrun++;
1626 if (lp->send_underrun == 3) lp->send_cmd = TX_AFTER_381;
1627 else if (lp->send_underrun == 6) lp->send_cmd = TX_AFTER_ALL;
1628 /* transmit cycle is done, although
1629 frame wasn't transmitted - this
1630 avoids having to wait for the upper
1631 layers to timeout on us, in the
1632 event of a tx underrun */
1633 netif_wake_queue(dev); /* Inform upper layers. */
1634 }
1635#if ALLOW_DMA
1636 if (lp->use_dma && (status & RX_DMA)) {
1637 int count = readreg(dev, PP_DmaFrameCnt);
1638 while(count) {
1639 if (net_debug > 5)
1640 printk("%s: receiving %d DMA frames\n", dev->name, count);
1641 if (net_debug > 2 && count >1)
1642 printk("%s: receiving %d DMA frames\n", dev->name, count);
1643 dma_rx(dev);
1644 if (--count == 0)
1645 count = readreg(dev, PP_DmaFrameCnt);
1646 if (net_debug > 2 && count > 0)
1647 printk("%s: continuing with %d DMA frames\n", dev->name, count);
1648 }
1649 }
1650#endif
1651 break;
1652 case ISQ_RX_MISS_EVENT:
1653 lp->stats.rx_missed_errors += (status >>6);
1654 break;
1655 case ISQ_TX_COL_EVENT:
1656 lp->stats.collisions += (status >>6);
1657 break;
1658 }
1659 }
1660 return IRQ_RETVAL(handled);
1661}
1662
1663static void
1664count_rx_errors(int status, struct net_local *lp)
1665{
1666 lp->stats.rx_errors++;
1667 if (status & RX_RUNT) lp->stats.rx_length_errors++;
1668 if (status & RX_EXTRA_DATA) lp->stats.rx_length_errors++;
1669 if (status & RX_CRC_ERROR) if (!(status & (RX_EXTRA_DATA|RX_RUNT)))
1670 /* per str 172 */
1671 lp->stats.rx_crc_errors++;
1672 if (status & RX_DRIBBLE) lp->stats.rx_frame_errors++;
1673 return;
1674}
1675
1676/* We have a good packet(s), get it/them out of the buffers. */
1677static void
1678net_rx(struct net_device *dev)
1679{
1680 struct net_local *lp = netdev_priv(dev);
1681 struct sk_buff *skb;
1682 int status, length;
1683
1684 int ioaddr = dev->base_addr;
fc8c7d79
LB		 1685 status = readword(ioaddr, RX_FRAME_PORT);
1686 length = readword(ioaddr, RX_FRAME_PORT);
1da177e4
LT		 1687
1688 if ((status & RX_OK) == 0) {
1689 count_rx_errors(status, lp);
1690 return;
1691 }
1692
1693 /* Malloc up new buffer. */
1694 skb = dev_alloc_skb(length + 2);
1695 if (skb == NULL) {
1696#if 0 /* Again, this seems a cruel thing to do */
1697 printk(KERN_WARNING "%s: Memory squeeze, dropping packet.\n", dev->name);
1698#endif
1699 lp->stats.rx_dropped++;
1700 return;
1701 }
1702 skb_reserve(skb, 2); /* longword align L3 header */
1703 skb->dev = dev;
1704
084f746a 1705 readwords(ioaddr, RX_FRAME_PORT, skb_put(skb, length), length >> 1);
1da177e4 1706 if (length & 1)
fc8c7d79 1707 skb->data[length-1] = readword(ioaddr, RX_FRAME_PORT);
1da177e4
LT		 1708
1709 if (net_debug > 3) {
1710 printk( "%s: received %d byte packet of type %x\n",
1711 dev->name, length,
1712 (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]);
1713 }
1714
1715 skb->protocol=eth_type_trans(skb,dev);
1716 netif_rx(skb);
1717 dev->last_rx = jiffies;
1718 lp->stats.rx_packets++;
1719 lp->stats.rx_bytes += length;
1720}
1721
1722#if ALLOW_DMA
1723static void release_dma_buff(struct net_local *lp)
1724{
1725 if (lp->dma_buff) {
1726 free_pages((unsigned long)(lp->dma_buff), get_order(lp->dmasize * 1024));
1727 lp->dma_buff = NULL;
1728 }
1729}
1730#endif
1731
1732/* The inverse routine to net_open(). */
1733static int
1734net_close(struct net_device *dev)
1735{
1736#if ALLOW_DMA
1737 struct net_local *lp = netdev_priv(dev);
1738#endif
1739
1740 netif_stop_queue(dev);
1741
1742 writereg(dev, PP_RxCFG, 0);
1743 writereg(dev, PP_TxCFG, 0);
1744 writereg(dev, PP_BufCFG, 0);
1745 writereg(dev, PP_BusCTL, 0);
1746
1747 free_irq(dev->irq, dev);
1748
1749#if ALLOW_DMA
1750 if (lp->use_dma && lp->dma) {
1751 free_dma(dev->dma);
1752 release_dma_buff(lp);
1753 }
1754#endif
1755
1756 /* Update the statistics here. */
1757 return 0;
1758}
1759
1760/* Get the current statistics. This may be called with the card open or
1761 closed. */
1762static struct net_device_stats *
1763net_get_stats(struct net_device *dev)
1764{
1765 struct net_local *lp = netdev_priv(dev);
1766 unsigned long flags;
1767
1768 spin_lock_irqsave(&lp->lock, flags);
1769 /* Update the statistics from the device registers. */
1770 lp->stats.rx_missed_errors += (readreg(dev, PP_RxMiss) >> 6);
1771 lp->stats.collisions += (readreg(dev, PP_TxCol) >> 6);
1772 spin_unlock_irqrestore(&lp->lock, flags);
1773
1774 return &lp->stats;
1775}
1776
1777static void set_multicast_list(struct net_device *dev)
1778{
1779 struct net_local *lp = netdev_priv(dev);
1780 unsigned long flags;
1781
1782 spin_lock_irqsave(&lp->lock, flags);
1783 if(dev->flags&IFF_PROMISC)
1784 {
1785 lp->rx_mode = RX_ALL_ACCEPT;
1786 }
1787 else if((dev->flags&IFF_ALLMULTI)||dev->mc_list)
1788 {
1789 /* The multicast-accept list is initialized to accept-all, and we
1790 rely on higher-level filtering for now. */
1791 lp->rx_mode = RX_MULTCAST_ACCEPT;
1792 }
1793 else
1794 lp->rx_mode = 0;
1795
1796 writereg(dev, PP_RxCTL, DEF_RX_ACCEPT | lp->rx_mode);
1797
1798 /* in promiscuous mode, we accept errored packets, so we have to enable interrupts on them also */
1799 writereg(dev, PP_RxCFG, lp->curr_rx_cfg |
1800 (lp->rx_mode == RX_ALL_ACCEPT? (RX_CRC_ERROR_ENBL|RX_RUNT_ENBL|RX_EXTRA_DATA_ENBL) : 0));
1801 spin_unlock_irqrestore(&lp->lock, flags);
1802}
1803
1804
1805static int set_mac_address(struct net_device *dev, void *p)
1806{
1807 int i;
1808 struct sockaddr *addr = p;
1809
1810
1811 if (netif_running(dev))
1812 return -EBUSY;
1813
1814 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1815
1816 if (net_debug) {
1817 printk("%s: Setting MAC address to ", dev->name);
1818 for (i = 0; i < dev->addr_len; i++)
1819 printk(" %2.2x", dev->dev_addr[i]);
1820 printk(".\n");
1821 }
1822 /* set the Ethernet address */
1823 for (i=0; i < ETH_ALEN/2; i++)
1824 writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8));
1825
1826 return 0;
1827}
1828
1829#ifdef MODULE
1830
1831static struct net_device *dev_cs89x0;
1832
1833/*
1834 * Support the 'debug' module parm even if we're compiled for non-debug to
1835 * avoid breaking someone's startup scripts
1836 */
1837
1838static int io;
1839static int irq;
1840static int debug;
1841static char media[8];
1842static int duplex=-1;
1843
1844static int use_dma; /* These generate unused var warnings if ALLOW_DMA = 0 */
1845static int dma;
1846static int dmasize=16; /* or 64 */
1847
1848module_param(io, int, 0);
1849module_param(irq, int, 0);
1850module_param(debug, int, 0);
1851module_param_string(media, media, sizeof(media), 0);
1852module_param(duplex, int, 0);
1853module_param(dma , int, 0);
1854module_param(dmasize , int, 0);
1855module_param(use_dma , int, 0);
1856MODULE_PARM_DESC(io, "cs89x0 I/O base address");
1857MODULE_PARM_DESC(irq, "cs89x0 IRQ number");
1858#if DEBUGGING
1859MODULE_PARM_DESC(debug, "cs89x0 debug level (0-6)");
1860#else
1861MODULE_PARM_DESC(debug, "(ignored)");
1862#endif
1863MODULE_PARM_DESC(media, "Set cs89x0 adapter(s) media type(s) (rj45,bnc,aui)");
1864/* No other value than -1 for duplex seems to be currently interpreted */
1865MODULE_PARM_DESC(duplex, "(ignored)");
1866#if ALLOW_DMA
1867MODULE_PARM_DESC(dma , "cs89x0 ISA DMA channel; ignored if use_dma=0");
1868MODULE_PARM_DESC(dmasize , "cs89x0 DMA size in kB (16,64); ignored if use_dma=0");
1869MODULE_PARM_DESC(use_dma , "cs89x0 using DMA (0-1)");
1870#else
1871MODULE_PARM_DESC(dma , "(ignored)");
1872MODULE_PARM_DESC(dmasize , "(ignored)");
1873MODULE_PARM_DESC(use_dma , "(ignored)");
1874#endif
1875
1876MODULE_AUTHOR("Mike Cruse, Russwll Nelson <nelson@crynwr.com>, Andrew Morton <andrewm@uow.edu.au>");
1877MODULE_LICENSE("GPL");
1878
1879
1880/*
1881* media=t - specify media type
1882 or media=2
1883 or media=aui
1884 or medai=auto
1885* duplex=0 - specify forced half/full/autonegotiate duplex
1886* debug=# - debug level
1887
1888
1889* Default Chip Configuration:
1890 * DMA Burst = enabled
1891 * IOCHRDY Enabled = enabled
1892 * UseSA = enabled
1893 * CS8900 defaults to half-duplex if not specified on command-line
1894 * CS8920 defaults to autoneg if not specified on command-line
1895 * Use reset defaults for other config parameters
1896
1897* Assumptions:
1898 * media type specified is supported (circuitry is present)
1899 * if memory address is > 1MB, then required mem decode hw is present
1900 * if 10B-2, then agent other than driver will enable DC/DC converter
1901 (hw or software util)
1902
1903
1904*/
1905
1906int
1907init_module(void)
1908{
1909 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
1910 struct net_local *lp;
1911 int ret = 0;
1912
1913#if DEBUGGING
1914 net_debug = debug;
1915#else
1916 debug = 0;
1917#endif
1918 if (!dev)
1919 return -ENOMEM;
1920
1921 dev->irq = irq;
1922 dev->base_addr = io;
1923 lp = netdev_priv(dev);
1924
1925#if ALLOW_DMA
1926 if (use_dma) {
1927 lp->use_dma = use_dma;
1928 lp->dma = dma;
1929 lp->dmasize = dmasize;
1930 }
1931#endif
1932
1933 spin_lock_init(&lp->lock);
1934
1935 /* boy, they'd better get these right */
1936 if (!strcmp(media, "rj45"))
1937 lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T;
1938 else if (!strcmp(media, "aui"))
1939 lp->adapter_cnf = A_CNF_MEDIA_AUI | A_CNF_AUI;
1940 else if (!strcmp(media, "bnc"))
1941 lp->adapter_cnf = A_CNF_MEDIA_10B_2 | A_CNF_10B_2;
1942 else
1943 lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T;
1944
1945 if (duplex==-1)
1946 lp->auto_neg_cnf = AUTO_NEG_ENABLE;
1947
1948 if (io == 0) {
1949 printk(KERN_ERR "cs89x0.c: Module autoprobing not allowed.\n");
1950 printk(KERN_ERR "cs89x0.c: Append io=0xNNN\n");
1951 ret = -EPERM;
1952 goto out;
1953 } else if (io <= 0x1ff) {
1954 ret = -ENXIO;
1955 goto out;
1956 }
1957
1958#if ALLOW_DMA
1959 if (use_dma && dmasize != 16 && dmasize != 64) {
1960 printk(KERN_ERR "cs89x0.c: dma size must be either 16K or 64K, not %dK\n", dmasize);
1961 ret = -EPERM;
1962 goto out;
1963 }
1964#endif
1965 ret = cs89x0_probe1(dev, io, 1);
1966 if (ret)
1967 goto out;
1968
1da177e4
LT		 1969 dev_cs89x0 = dev;
1970 return 0;
1971out:
1972 free_netdev(dev);
1973 return ret;
1974}
1975
1976void
1977cleanup_module(void)
1978{
1979 unregister_netdev(dev_cs89x0);
fc8c7d79 1980 writeword(dev_cs89x0->base_addr, ADD_PORT, PP_ChipID);
1da177e4
LT		 1981 release_region(dev_cs89x0->base_addr, NETCARD_IO_EXTENT);
1982 free_netdev(dev_cs89x0);
1983}
1984#endif /* MODULE */
1985\f
1986/*
1987 * Local variables:
1988 * version-control: t
1989 * kept-new-versions: 5
1990 * c-indent-level: 8
1991 * tab-width: 8
1992 * End:
1993 *
1994 */
Linux 6.x block layer and io_uring tree(s)