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Linux 2.6.17.7
[linux/fpc-iii.git] / drivers / net / cs89x0.c
blobef54ebeb29b85196ea8626a4597ec46437076912
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
90 Dmitry Pervushin : dpervushin@ru.mvista.com
91 : PNX010X platform support
92
93 Deepak Saxena : dsaxena@plexity.net
94 : Intel IXDP2351 platform support
95
96 Dmitry Pervushin : dpervushin@ru.mvista.com
97 : PNX010X platform support
98
99 */
100
101 /* Always include 'config.h' first in case the user wants to turn on
102 or override something. */
103 #include <linux/config.h>
104 #include <linux/module.h>
105
106 /*
107 * Set this to zero to disable DMA code
108 *
109 * Note that even if DMA is turned off we still support the 'dma' and 'use_dma'
110 * module options so we don't break any startup scripts.
111 */
112 #ifndef CONFIG_ISA_DMA_API
113 #define ALLOW_DMA 0
114 #else
115 #define ALLOW_DMA 1
116 #endif
117
118 /*
119 * Set this to zero to remove all the debug statements via
120 * dead code elimination
121 */
122 #define DEBUGGING 1
123
124 /*
125 Sources:
126
127 Crynwr packet driver epktisa.
128
129 Crystal Semiconductor data sheets.
130
131 */
132
133 #include <linux/errno.h>
134 #include <linux/netdevice.h>
135 #include <linux/etherdevice.h>
136 #include <linux/kernel.h>
137 #include <linux/types.h>
138 #include <linux/fcntl.h>
139 #include <linux/interrupt.h>
140 #include <linux/ioport.h>
141 #include <linux/in.h>
142 #include <linux/skbuff.h>
143 #include <linux/slab.h>
144 #include <linux/spinlock.h>
145 #include <linux/string.h>
146 #include <linux/init.h>
147 #include <linux/bitops.h>
148 #include <linux/delay.h>
149
150 #include <asm/system.h>
151 #include <asm/io.h>
152 #include <asm/irq.h>
153 #if ALLOW_DMA
154 #include <asm/dma.h>
155 #endif
156
157 #include "cs89x0.h"
158
159 static char version[] __initdata =
160 "cs89x0.c: v2.4.3-pre1 Russell Nelson <nelson@crynwr.com>, Andrew Morton <andrewm@uow.edu.au>\n";
161
162 #define DRV_NAME "cs89x0"
163
164 /* First, a few definitions that the brave might change.
165 A zero-terminated list of I/O addresses to be probed. Some special flags..
166 Addr & 1 = Read back the address port, look for signature and reset
167 the page window before probing
168 Addr & 3 = Reset the page window and probe
169 The CLPS eval board has the Cirrus chip at 0x80090300, in ARM IO space,
170 but it is possible that a Cirrus board could be plugged into the ISA
171 slots. */
172 /* The cs8900 has 4 IRQ pins, software selectable. cs8900_irq_map maps
173 them to system IRQ numbers. This mapping is card specific and is set to
174 the configuration of the Cirrus Eval board for this chip. */
175 #ifdef CONFIG_ARCH_CLPS7500
176 static unsigned int netcard_portlist[] __initdata =
177 { 0x80090303, 0x300, 0x320, 0x340, 0x360, 0x200, 0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x2e0, 0};
178 static unsigned int cs8900_irq_map[] = {12,0,0,0};
179 #elif defined(CONFIG_SH_HICOSH4)
180 static unsigned int netcard_portlist[] __initdata =
181 { 0x0300, 0};
182 static unsigned int cs8900_irq_map[] = {1,0,0,0};
183 #elif defined(CONFIG_MACH_IXDP2351)
184 static unsigned int netcard_portlist[] __initdata = {IXDP2351_VIRT_CS8900_BASE, 0};
185 static unsigned int cs8900_irq_map[] = {IRQ_IXDP2351_CS8900, 0, 0, 0};
186 #include <asm/irq.h>
187 #elif defined(CONFIG_ARCH_IXDP2X01)
188 #include <asm/irq.h>
189 static unsigned int netcard_portlist[] __initdata = {IXDP2X01_CS8900_VIRT_BASE, 0};
190 static unsigned int cs8900_irq_map[] = {IRQ_IXDP2X01_CS8900, 0, 0, 0};
191 #elif defined(CONFIG_ARCH_PNX010X)
192 #include <asm/irq.h>
193 #include <asm/arch/gpio.h>
194 #define CIRRUS_DEFAULT_BASE IO_ADDRESS(EXT_STATIC2_s0_BASE + 0x200000) /* = Physical address 0x48200000 */
195 #define CIRRUS_DEFAULT_IRQ VH_INTC_INT_NUM_CASCADED_INTERRUPT_1 /* Event inputs bank 1 - ID 35/bit 3 */
196 static unsigned int netcard_portlist[] __initdata = {CIRRUS_DEFAULT_BASE, 0};
197 static unsigned int cs8900_irq_map[] = {CIRRUS_DEFAULT_IRQ, 0, 0, 0};
198 #else
199 static unsigned int netcard_portlist[] __initdata =
200 { 0x300, 0x320, 0x340, 0x360, 0x200, 0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x2e0, 0};
201 static unsigned int cs8900_irq_map[] = {10,11,12,5};
202 #endif
203
204 #if DEBUGGING
205 static unsigned int net_debug = DEBUGGING;
206 #else
207 #define net_debug 0 /* gcc will remove all the debug code for us */
208 #endif
209
210 /* The number of low I/O ports used by the ethercard. */
211 #define NETCARD_IO_EXTENT 16
212
213 /* we allow the user to override various values normally set in the EEPROM */
214 #define FORCE_RJ45 0x0001 /* pick one of these three */
215 #define FORCE_AUI 0x0002
216 #define FORCE_BNC 0x0004
217
218 #define FORCE_AUTO 0x0010 /* pick one of these three */
219 #define FORCE_HALF 0x0020
220 #define FORCE_FULL 0x0030
221
222 /* Information that need to be kept for each board. */
223 struct net_local {
224 struct net_device_stats stats;
225 int chip_type; /* one of: CS8900, CS8920, CS8920M */
226 char chip_revision; /* revision letter of the chip ('A'...) */
227 int send_cmd; /* the proper send command: TX_NOW, TX_AFTER_381, or TX_AFTER_ALL */
228 int auto_neg_cnf; /* auto-negotiation word from EEPROM */
229 int adapter_cnf; /* adapter configuration from EEPROM */
230 int isa_config; /* ISA configuration from EEPROM */
231 int irq_map; /* IRQ map from EEPROM */
232 int rx_mode; /* what mode are we in? 0, RX_MULTCAST_ACCEPT, or RX_ALL_ACCEPT */
233 int curr_rx_cfg; /* a copy of PP_RxCFG */
234 int linectl; /* either 0 or LOW_RX_SQUELCH, depending on configuration. */
235 int send_underrun; /* keep track of how many underruns in a row we get */
236 int force; /* force various values; see FORCE* above. */
237 spinlock_t lock;
238 #if ALLOW_DMA
239 int use_dma; /* Flag: we're using dma */
240 int dma; /* DMA channel */
241 int dmasize; /* 16 or 64 */
242 unsigned char *dma_buff; /* points to the beginning of the buffer */
243 unsigned char *end_dma_buff; /* points to the end of the buffer */
244 unsigned char *rx_dma_ptr; /* points to the next packet */
245 #endif
246 };
247
248 /* Index to functions, as function prototypes. */
249
250 static int cs89x0_probe1(struct net_device *dev, int ioaddr, int modular);
251 static int net_open(struct net_device *dev);
252 static int net_send_packet(struct sk_buff *skb, struct net_device *dev);
253 static irqreturn_t net_interrupt(int irq, void *dev_id, struct pt_regs *regs);
254 static void set_multicast_list(struct net_device *dev);
255 static void net_timeout(struct net_device *dev);
256 static void net_rx(struct net_device *dev);
257 static int net_close(struct net_device *dev);
258 static struct net_device_stats *net_get_stats(struct net_device *dev);
259 static void reset_chip(struct net_device *dev);
260 static int get_eeprom_data(struct net_device *dev, int off, int len, int *buffer);
261 static int get_eeprom_cksum(int off, int len, int *buffer);
262 static int set_mac_address(struct net_device *dev, void *addr);
263 static void count_rx_errors(int status, struct net_local *lp);
264 #ifdef CONFIG_NET_POLL_CONTROLLER
265 static void net_poll_controller(struct net_device *dev);
266 #endif
267 #if ALLOW_DMA
268 static void get_dma_channel(struct net_device *dev);
269 static void release_dma_buff(struct net_local *lp);
270 #endif
271
272 /* Example routines you must write ;->. */
273 #define tx_done(dev) 1
274
275 /*
276 * Permit 'cs89x0_dma=N' in the kernel boot environment
277 */
278 #if !defined(MODULE) && (ALLOW_DMA != 0)
279 static int g_cs89x0_dma;
280
281 static int __init dma_fn(char *str)
282 {
283 g_cs89x0_dma = simple_strtol(str,NULL,0);
284 return 1;
285 }
286
287 __setup("cs89x0_dma=", dma_fn);
288 #endif /* !defined(MODULE) && (ALLOW_DMA != 0) */
289
290 #ifndef MODULE
291 static int g_cs89x0_media__force;
292
293 static int __init media_fn(char *str)
294 {
295 if (!strcmp(str, "rj45")) g_cs89x0_media__force = FORCE_RJ45;
296 else if (!strcmp(str, "aui")) g_cs89x0_media__force = FORCE_AUI;
297 else if (!strcmp(str, "bnc")) g_cs89x0_media__force = FORCE_BNC;
298 return 1;
299 }
300
301 __setup("cs89x0_media=", media_fn);
302
303 \f
304 /* Check for a network adaptor of this type, and return '0' iff one exists.
305 If dev->base_addr == 0, probe all likely locations.
306 If dev->base_addr == 1, always return failure.
307 If dev->base_addr == 2, allocate space for the device and return success
308 (detachable devices only).
309 Return 0 on success.
310 */
311
312 struct net_device * __init cs89x0_probe(int unit)
313 {
314 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
315 unsigned *port;
316 int err = 0;
317 int irq;
318 int io;
319
320 if (!dev)
321 return ERR_PTR(-ENODEV);
322
323 sprintf(dev->name, "eth%d", unit);
324 netdev_boot_setup_check(dev);
325 io = dev->base_addr;
326 irq = dev->irq;
327
328 if (net_debug)
329 printk("cs89x0:cs89x0_probe(0x%x)\n", io);
330
331 if (io > 0x1ff) { /* Check a single specified location. */
332 err = cs89x0_probe1(dev, io, 0);
333 } else if (io != 0) { /* Don't probe at all. */
334 err = -ENXIO;
335 } else {
336 for (port = netcard_portlist; *port; port++) {
337 if (cs89x0_probe1(dev, *port, 0) == 0)
338 break;
339 dev->irq = irq;
340 }
341 if (!*port)
342 err = -ENODEV;
343 }
344 if (err)
345 goto out;
346 return dev;
347 out:
348 free_netdev(dev);
349 printk(KERN_WARNING "cs89x0: no cs8900 or cs8920 detected. Be sure to disable PnP with SETUP\n");
350 return ERR_PTR(err);
351 }
352 #endif
353
354 #if defined(CONFIG_MACH_IXDP2351)
355 static u16
356 readword(unsigned long base_addr, int portno)
357 {
358 return __raw_readw(base_addr + (portno << 1));
359 }
360
361 static void
362 writeword(unsigned long base_addr, int portno, u16 value)
363 {
364 __raw_writew(value, base_addr + (portno << 1));
365 }
366 #elif defined(CONFIG_ARCH_IXDP2X01)
367 static u16
368 readword(unsigned long base_addr, int portno)
369 {
370 return __raw_readl(base_addr + (portno << 1));
371 }
372
373 static void
374 writeword(unsigned long base_addr, int portno, u16 value)
375 {
376 __raw_writel(value, base_addr + (portno << 1));
377 }
378 #elif defined(CONFIG_ARCH_PNX010X)
379 static u16
380 readword(unsigned long base_addr, int portno)
381 {
382 return inw(base_addr + (portno << 1));
383 }
384
385 static void
386 writeword(unsigned long base_addr, int portno, u16 value)
387 {
388 outw(value, base_addr + (portno << 1));
389 }
390 #else
391 static u16
392 readword(unsigned long base_addr, int portno)
393 {
394 return inw(base_addr + portno);
395 }
396
397 static void
398 writeword(unsigned long base_addr, int portno, u16 value)
399 {
400 outw(value, base_addr + portno);
401 }
402 #endif
403
404 static void
405 readwords(unsigned long base_addr, int portno, void *buf, int length)
406 {
407 u8 *buf8 = (u8 *)buf;
408
409 do {
410 u16 tmp16;
411
412 tmp16 = readword(base_addr, portno);
413 *buf8++ = (u8)tmp16;
414 *buf8++ = (u8)(tmp16 >> 8);
415 } while (--length);
416 }
417
418 static void
419 writewords(unsigned long base_addr, int portno, void *buf, int length)
420 {
421 u8 *buf8 = (u8 *)buf;
422
423 do {
424 u16 tmp16;
425
426 tmp16 = *buf8++;
427 tmp16 |= (*buf8++) << 8;
428 writeword(base_addr, portno, tmp16);
429 } while (--length);
430 }
431
432 static u16
433 readreg(struct net_device *dev, u16 regno)
434 {
435 writeword(dev->base_addr, ADD_PORT, regno);
436 return readword(dev->base_addr, DATA_PORT);
437 }
438
439 static void
440 writereg(struct net_device *dev, u16 regno, u16 value)
441 {
442 writeword(dev->base_addr, ADD_PORT, regno);
443 writeword(dev->base_addr, DATA_PORT, value);
444 }
445
446 static int __init
447 wait_eeprom_ready(struct net_device *dev)
448 {
449 int timeout = jiffies;
450 /* check to see if the EEPROM is ready, a timeout is used -
451 just in case EEPROM is ready when SI_BUSY in the
452 PP_SelfST is clear */
453 while(readreg(dev, PP_SelfST) & SI_BUSY)
454 if (jiffies - timeout >= 40)
455 return -1;
456 return 0;
457 }
458
459 static int __init
460 get_eeprom_data(struct net_device *dev, int off, int len, int *buffer)
461 {
462 int i;
463
464 if (net_debug > 3) printk("EEPROM data from %x for %x:\n",off,len);
465 for (i = 0; i < len; i++) {
466 if (wait_eeprom_ready(dev) < 0) return -1;
467 /* Now send the EEPROM read command and EEPROM location to read */
468 writereg(dev, PP_EECMD, (off + i) | EEPROM_READ_CMD);
469 if (wait_eeprom_ready(dev) < 0) return -1;
470 buffer[i] = readreg(dev, PP_EEData);
471 if (net_debug > 3) printk("%04x ", buffer[i]);
472 }
473 if (net_debug > 3) printk("\n");
474 return 0;
475 }
476
477 static int __init
478 get_eeprom_cksum(int off, int len, int *buffer)
479 {
480 int i, cksum;
481
482 cksum = 0;
483 for (i = 0; i < len; i++)
484 cksum += buffer[i];
485 cksum &= 0xffff;
486 if (cksum == 0)
487 return 0;
488 return -1;
489 }
490
491 #ifdef CONFIG_NET_POLL_CONTROLLER
492 /*
493 * Polling receive - used by netconsole and other diagnostic tools
494 * to allow network i/o with interrupts disabled.
495 */
496 static void net_poll_controller(struct net_device *dev)
497 {
498 disable_irq(dev->irq);
499 net_interrupt(dev->irq, dev, NULL);
500 enable_irq(dev->irq);
501 }
502 #endif
503
504 /* This is the real probe routine. Linux has a history of friendly device
505 probes on the ISA bus. A good device probes avoids doing writes, and
506 verifies that the correct device exists and functions.
507 Return 0 on success.
508 */
509
510 static int __init
511 cs89x0_probe1(struct net_device *dev, int ioaddr, int modular)
512 {
513 struct net_local *lp = netdev_priv(dev);
514 static unsigned version_printed;
515 int i;
516 int tmp;
517 unsigned rev_type = 0;
518 int eeprom_buff[CHKSUM_LEN];
519 int retval;
520
521 SET_MODULE_OWNER(dev);
522 /* Initialize the device structure. */
523 if (!modular) {
524 memset(lp, 0, sizeof(*lp));
525 spin_lock_init(&lp->lock);
526 #ifndef MODULE
527 #if ALLOW_DMA
528 if (g_cs89x0_dma) {
529 lp->use_dma = 1;
530 lp->dma = g_cs89x0_dma;
531 lp->dmasize = 16; /* Could make this an option... */
532 }
533 #endif
534 lp->force = g_cs89x0_media__force;
535 #endif
536 }
537
538 #ifdef CONFIG_ARCH_PNX010X
539 initialize_ebi();
540
541 /* Map GPIO registers for the pins connected to the CS8900a. */
542 if (map_cirrus_gpio() < 0)
543 return -ENODEV;
544
545 reset_cirrus();
546
547 /* Map event-router registers. */
548 if (map_event_router() < 0)
549 return -ENODEV;
550
551 enable_cirrus_irq();
552
553 unmap_cirrus_gpio();
554 unmap_event_router();
555
556 dev->base_addr = ioaddr;
557
558 for (i = 0 ; i < 3 ; i++)
559 readreg(dev, 0);
560 #endif
561
562 /* Grab the region so we can find another board if autoIRQ fails. */
563 /* WTF is going on here? */
564 if (!request_region(ioaddr & ~3, NETCARD_IO_EXTENT, DRV_NAME)) {
565 printk(KERN_ERR "%s: request_region(0x%x, 0x%x) failed\n",
566 DRV_NAME, ioaddr, NETCARD_IO_EXTENT);
567 retval = -EBUSY;
568 goto out1;
569 }
570
571 #ifdef CONFIG_SH_HICOSH4
572 /* truely reset the chip */
573 writeword(ioaddr, ADD_PORT, 0x0114);
574 writeword(ioaddr, DATA_PORT, 0x0040);
575 #endif
576
577 /* if they give us an odd I/O address, then do ONE write to
578 the address port, to get it back to address zero, where we
579 expect to find the EISA signature word. An IO with a base of 0x3
580 will skip the test for the ADD_PORT. */
581 if (ioaddr & 1) {
582 if (net_debug > 1)
583 printk(KERN_INFO "%s: odd ioaddr 0x%x\n", dev->name, ioaddr);
584 if ((ioaddr & 2) != 2)
585 if ((readword(ioaddr & ~3, ADD_PORT) & ADD_MASK) != ADD_SIG) {
586 printk(KERN_ERR "%s: bad signature 0x%x\n",
587 dev->name, readword(ioaddr & ~3, ADD_PORT));
588 retval = -ENODEV;
589 goto out2;
590 }
591 }
592 printk(KERN_DEBUG "PP_addr at %x[%x]: 0x%x\n",
593 ioaddr, ADD_PORT, readword(ioaddr, ADD_PORT));
594
595 ioaddr &= ~3;
596 writeword(ioaddr, ADD_PORT, PP_ChipID);
597
598 tmp = readword(ioaddr, DATA_PORT);
599 if (tmp != CHIP_EISA_ID_SIG) {
600 printk(KERN_DEBUG "%s: incorrect signature at %x[%x]: 0x%x!="
601 CHIP_EISA_ID_SIG_STR "\n",
602 dev->name, ioaddr, DATA_PORT, tmp);
603 retval = -ENODEV;
604 goto out2;
605 }
606
607 /* Fill in the 'dev' fields. */
608 dev->base_addr = ioaddr;
609
610 /* get the chip type */
611 rev_type = readreg(dev, PRODUCT_ID_ADD);
612 lp->chip_type = rev_type &~ REVISON_BITS;
613 lp->chip_revision = ((rev_type & REVISON_BITS) >> 8) + 'A';
614
615 /* Check the chip type and revision in order to set the correct send command
616 CS8920 revision C and CS8900 revision F can use the faster send. */
617 lp->send_cmd = TX_AFTER_381;
618 if (lp->chip_type == CS8900 && lp->chip_revision >= 'F')
619 lp->send_cmd = TX_NOW;
620 if (lp->chip_type != CS8900 && lp->chip_revision >= 'C')
621 lp->send_cmd = TX_NOW;
622
623 if (net_debug && version_printed++ == 0)
624 printk(version);
625
626 printk(KERN_INFO "%s: cs89%c0%s rev %c found at %#3lx ",
627 dev->name,
628 lp->chip_type==CS8900?'0':'2',
629 lp->chip_type==CS8920M?"M":"",
630 lp->chip_revision,
631 dev->base_addr);
632
633 reset_chip(dev);
634
635 /* Here we read the current configuration of the chip. If there
636 is no Extended EEPROM then the idea is to not disturb the chip
637 configuration, it should have been correctly setup by automatic
638 EEPROM read on reset. So, if the chip says it read the EEPROM
639 the driver will always do *something* instead of complain that
640 adapter_cnf is 0. */
641
642 #ifdef CONFIG_SH_HICOSH4
643 if (1) {
644 /* For the HiCO.SH4 board, things are different: we don't
645 have EEPROM, but there is some data in flash, so we go
646 get it there directly (MAC). */
647 __u16 *confd;
648 short cnt;
649 if (((* (volatile __u32 *) 0xa0013ff0) & 0x00ffffff)
650 == 0x006c3000) {
651 confd = (__u16*) 0xa0013fc0;
652 } else {
653 confd = (__u16*) 0xa001ffc0;
654 }
655 cnt = (*confd++ & 0x00ff) >> 1;
656 while (--cnt > 0) {
657 __u16 j = *confd++;
658
659 switch (j & 0x0fff) {
660 case PP_IA:
661 for (i = 0; i < ETH_ALEN/2; i++) {
662 dev->dev_addr[i*2] = confd[i] & 0xFF;
663 dev->dev_addr[i*2+1] = confd[i] >> 8;
664 }
665 break;
666 }
667 j = (j >> 12) + 1;
668 confd += j;
669 cnt -= j;
670 }
671 } else
672 #endif
673
674 if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) ==
675 (EEPROM_OK|EEPROM_PRESENT)) {
676 /* Load the MAC. */
677 for (i=0; i < ETH_ALEN/2; i++) {
678 unsigned int Addr;
679 Addr = readreg(dev, PP_IA+i*2);
680 dev->dev_addr[i*2] = Addr & 0xFF;
681 dev->dev_addr[i*2+1] = Addr >> 8;
682 }
683
684 /* Load the Adapter Configuration.
685 Note: Barring any more specific information from some
686 other source (ie EEPROM+Schematics), we would not know
687 how to operate a 10Base2 interface on the AUI port.
688 However, since we do read the status of HCB1 and use
689 settings that always result in calls to control_dc_dc(dev,0)
690 a BNC interface should work if the enable pin
691 (dc/dc converter) is on HCB1. It will be called AUI
692 however. */
693
694 lp->adapter_cnf = 0;
695 i = readreg(dev, PP_LineCTL);
696 /* Preserve the setting of the HCB1 pin. */
697 if ((i & (HCB1 | HCB1_ENBL)) == (HCB1 | HCB1_ENBL))
698 lp->adapter_cnf |= A_CNF_DC_DC_POLARITY;
699 /* Save the sqelch bit */
700 if ((i & LOW_RX_SQUELCH) == LOW_RX_SQUELCH)
701 lp->adapter_cnf |= A_CNF_EXTND_10B_2 | A_CNF_LOW_RX_SQUELCH;
702 /* Check if the card is in 10Base-t only mode */
703 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == 0)
704 lp->adapter_cnf |= A_CNF_10B_T | A_CNF_MEDIA_10B_T;
705 /* Check if the card is in AUI only mode */
706 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUI_ONLY)
707 lp->adapter_cnf |= A_CNF_AUI | A_CNF_MEDIA_AUI;
708 /* Check if the card is in Auto mode. */
709 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUTO_AUI_10BASET)
710 lp->adapter_cnf |= A_CNF_AUI | A_CNF_10B_T |
711 A_CNF_MEDIA_AUI | A_CNF_MEDIA_10B_T | A_CNF_MEDIA_AUTO;
712
713 if (net_debug > 1)
714 printk(KERN_INFO "%s: PP_LineCTL=0x%x, adapter_cnf=0x%x\n",
715 dev->name, i, lp->adapter_cnf);
716
717 /* IRQ. Other chips already probe, see below. */
718 if (lp->chip_type == CS8900)
719 lp->isa_config = readreg(dev, PP_CS8900_ISAINT) & INT_NO_MASK;
720
721 printk( "[Cirrus EEPROM] ");
722 }
723
724 printk("\n");
725
726 /* First check to see if an EEPROM is attached. */
727 #ifdef CONFIG_SH_HICOSH4 /* no EEPROM on HiCO, don't hazzle with it here */
728 if (1) {
729 printk(KERN_NOTICE "cs89x0: No EEPROM on HiCO.SH4\n");
730 } else
731 #endif
732 if ((readreg(dev, PP_SelfST) & EEPROM_PRESENT) == 0)
733 printk(KERN_WARNING "cs89x0: No EEPROM, relying on command line....\n");
734 else if (get_eeprom_data(dev, START_EEPROM_DATA,CHKSUM_LEN,eeprom_buff) < 0) {
735 printk(KERN_WARNING "\ncs89x0: EEPROM read failed, relying on command line.\n");
736 } else if (get_eeprom_cksum(START_EEPROM_DATA,CHKSUM_LEN,eeprom_buff) < 0) {
737 /* Check if the chip was able to read its own configuration starting
738 at 0 in the EEPROM*/
739 if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) !=
740 (EEPROM_OK|EEPROM_PRESENT))
741 printk(KERN_WARNING "cs89x0: Extended EEPROM checksum bad and no Cirrus EEPROM, relying on command line\n");
742
743 } else {
744 /* This reads an extended EEPROM that is not documented
745 in the CS8900 datasheet. */
746
747 /* get transmission control word but keep the autonegotiation bits */
748 if (!lp->auto_neg_cnf) lp->auto_neg_cnf = eeprom_buff[AUTO_NEG_CNF_OFFSET/2];
749 /* Store adapter configuration */
750 if (!lp->adapter_cnf) lp->adapter_cnf = eeprom_buff[ADAPTER_CNF_OFFSET/2];
751 /* Store ISA configuration */
752 lp->isa_config = eeprom_buff[ISA_CNF_OFFSET/2];
753 dev->mem_start = eeprom_buff[PACKET_PAGE_OFFSET/2] << 8;
754
755 /* eeprom_buff has 32-bit ints, so we can't just memcpy it */
756 /* store the initial memory base address */
757 for (i = 0; i < ETH_ALEN/2; i++) {
758 dev->dev_addr[i*2] = eeprom_buff[i];
759 dev->dev_addr[i*2+1] = eeprom_buff[i] >> 8;
760 }
761 if (net_debug > 1)
762 printk(KERN_DEBUG "%s: new adapter_cnf: 0x%x\n",
763 dev->name, lp->adapter_cnf);
764 }
765
766 /* allow them to force multiple transceivers. If they force multiple, autosense */
767 {
768 int count = 0;
769 if (lp->force & FORCE_RJ45) {lp->adapter_cnf |= A_CNF_10B_T; count++; }
770 if (lp->force & FORCE_AUI) {lp->adapter_cnf |= A_CNF_AUI; count++; }
771 if (lp->force & FORCE_BNC) {lp->adapter_cnf |= A_CNF_10B_2; count++; }
772 if (count > 1) {lp->adapter_cnf |= A_CNF_MEDIA_AUTO; }
773 else if (lp->force & FORCE_RJ45){lp->adapter_cnf |= A_CNF_MEDIA_10B_T; }
774 else if (lp->force & FORCE_AUI) {lp->adapter_cnf |= A_CNF_MEDIA_AUI; }
775 else if (lp->force & FORCE_BNC) {lp->adapter_cnf |= A_CNF_MEDIA_10B_2; }
776 }
777
778 if (net_debug > 1)
779 printk(KERN_DEBUG "%s: after force 0x%x, adapter_cnf=0x%x\n",
780 dev->name, lp->force, lp->adapter_cnf);
781
782 /* FIXME: We don't let you set dc-dc polarity or low RX squelch from the command line: add it here */
783
784 /* FIXME: We don't let you set the IMM bit from the command line: add it to lp->auto_neg_cnf here */
785
786 /* FIXME: we don't set the Ethernet address on the command line. Use
787 ifconfig IFACE hw ether AABBCCDDEEFF */
788
789 printk(KERN_INFO "cs89x0 media %s%s%s",
790 (lp->adapter_cnf & A_CNF_10B_T)?"RJ-45,":"",
791 (lp->adapter_cnf & A_CNF_AUI)?"AUI,":"",
792 (lp->adapter_cnf & A_CNF_10B_2)?"BNC,":"");
793
794 lp->irq_map = 0xffff;
795
796 /* If this is a CS8900 then no pnp soft */
797 if (lp->chip_type != CS8900 &&
798 /* Check if the ISA IRQ has been set */
799 (i = readreg(dev, PP_CS8920_ISAINT) & 0xff,
800 (i != 0 && i < CS8920_NO_INTS))) {
801 if (!dev->irq)
802 dev->irq = i;
803 } else {
804 i = lp->isa_config & INT_NO_MASK;
805 if (lp->chip_type == CS8900) {
806 #if defined(CONFIG_MACH_IXDP2351) || defined(CONFIG_ARCH_IXDP2X01) || defined(CONFIG_ARCH_PNX010X)
807 i = cs8900_irq_map[0];
808 #else
809 /* Translate the IRQ using the IRQ mapping table. */
810 if (i >= sizeof(cs8900_irq_map)/sizeof(cs8900_irq_map[0]))
811 printk("\ncs89x0: invalid ISA interrupt number %d\n", i);
812 else
813 i = cs8900_irq_map[i];
814
815 lp->irq_map = CS8900_IRQ_MAP; /* fixed IRQ map for CS8900 */
816 } else {
817 int irq_map_buff[IRQ_MAP_LEN/2];
818
819 if (get_eeprom_data(dev, IRQ_MAP_EEPROM_DATA,
820 IRQ_MAP_LEN/2,
821 irq_map_buff) >= 0) {
822 if ((irq_map_buff[0] & 0xff) == PNP_IRQ_FRMT)
823 lp->irq_map = (irq_map_buff[0]>>8) | (irq_map_buff[1] << 8);
824 }
825 #endif
826 }
827 if (!dev->irq)
828 dev->irq = i;
829 }
830
831 printk(" IRQ %d", dev->irq);
832
833 #if ALLOW_DMA
834 if (lp->use_dma) {
835 get_dma_channel(dev);
836 printk(", DMA %d", dev->dma);
837 }
838 else
839 #endif
840 {
841 printk(", programmed I/O");
842 }
843
844 /* print the ethernet address. */
845 printk(", MAC");
846 for (i = 0; i < ETH_ALEN; i++)
847 {
848 printk("%c%02x", i ? ':' : ' ', dev->dev_addr[i]);
849 }
850
851 dev->open = net_open;
852 dev->stop = net_close;
853 dev->tx_timeout = net_timeout;
854 dev->watchdog_timeo = HZ;
855 dev->hard_start_xmit = net_send_packet;
856 dev->get_stats = net_get_stats;
857 dev->set_multicast_list = set_multicast_list;
858 dev->set_mac_address = set_mac_address;
859 #ifdef CONFIG_NET_POLL_CONTROLLER
860 dev->poll_controller = net_poll_controller;
861 #endif
862
863 printk("\n");
864 if (net_debug)
865 printk("cs89x0_probe1() successful\n");
866
867 retval = register_netdev(dev);
868 if (retval)
869 goto out3;
870 return 0;
871 out3:
872 writeword(dev->base_addr, ADD_PORT, PP_ChipID);
873 out2:
874 release_region(ioaddr & ~3, NETCARD_IO_EXTENT);
875 out1:
876 return retval;
877 }
878
879 \f
880 /*********************************
881 * This page contains DMA routines
882 **********************************/
883
884 #if ALLOW_DMA
885
886 #define dma_page_eq(ptr1, ptr2) ((long)(ptr1)>>17 == (long)(ptr2)>>17)
887
888 static void
889 get_dma_channel(struct net_device *dev)
890 {
891 struct net_local *lp = netdev_priv(dev);
892
893 if (lp->dma) {
894 dev->dma = lp->dma;
895 lp->isa_config |= ISA_RxDMA;
896 } else {
897 if ((lp->isa_config & ANY_ISA_DMA) == 0)
898 return;
899 dev->dma = lp->isa_config & DMA_NO_MASK;
900 if (lp->chip_type == CS8900)
901 dev->dma += 5;
902 if (dev->dma < 5 || dev->dma > 7) {
903 lp->isa_config &= ~ANY_ISA_DMA;
904 return;
905 }
906 }
907 return;
908 }
909
910 static void
911 write_dma(struct net_device *dev, int chip_type, int dma)
912 {
913 struct net_local *lp = netdev_priv(dev);
914 if ((lp->isa_config & ANY_ISA_DMA) == 0)
915 return;
916 if (chip_type == CS8900) {
917 writereg(dev, PP_CS8900_ISADMA, dma-5);
918 } else {
919 writereg(dev, PP_CS8920_ISADMA, dma);
920 }
921 }
922
923 static void
924 set_dma_cfg(struct net_device *dev)
925 {
926 struct net_local *lp = netdev_priv(dev);
927
928 if (lp->use_dma) {
929 if ((lp->isa_config & ANY_ISA_DMA) == 0) {
930 if (net_debug > 3)
931 printk("set_dma_cfg(): no DMA\n");
932 return;
933 }
934 if (lp->isa_config & ISA_RxDMA) {
935 lp->curr_rx_cfg |= RX_DMA_ONLY;
936 if (net_debug > 3)
937 printk("set_dma_cfg(): RX_DMA_ONLY\n");
938 } else {
939 lp->curr_rx_cfg |= AUTO_RX_DMA; /* not that we support it... */
940 if (net_debug > 3)
941 printk("set_dma_cfg(): AUTO_RX_DMA\n");
942 }
943 }
944 }
945
946 static int
947 dma_bufcfg(struct net_device *dev)
948 {
949 struct net_local *lp = netdev_priv(dev);
950 if (lp->use_dma)
951 return (lp->isa_config & ANY_ISA_DMA)? RX_DMA_ENBL : 0;
952 else
953 return 0;
954 }
955
956 static int
957 dma_busctl(struct net_device *dev)
958 {
959 int retval = 0;
960 struct net_local *lp = netdev_priv(dev);
961 if (lp->use_dma) {
962 if (lp->isa_config & ANY_ISA_DMA)
963 retval |= RESET_RX_DMA; /* Reset the DMA pointer */
964 if (lp->isa_config & DMA_BURST)
965 retval |= DMA_BURST_MODE; /* Does ISA config specify DMA burst ? */
966 if (lp->dmasize == 64)
967 retval |= RX_DMA_SIZE_64K; /* did they ask for 64K? */
968 retval |= MEMORY_ON; /* we need memory enabled to use DMA. */
969 }
970 return retval;
971 }
972
973 static void
974 dma_rx(struct net_device *dev)
975 {
976 struct net_local *lp = netdev_priv(dev);
977 struct sk_buff *skb;
978 int status, length;
979 unsigned char *bp = lp->rx_dma_ptr;
980
981 status = bp[0] + (bp[1]<<8);
982 length = bp[2] + (bp[3]<<8);
983 bp += 4;
984 if (net_debug > 5) {
985 printk( "%s: receiving DMA packet at %lx, status %x, length %x\n",
986 dev->name, (unsigned long)bp, status, length);
987 }
988 if ((status & RX_OK) == 0) {
989 count_rx_errors(status, lp);
990 goto skip_this_frame;
991 }
992
993 /* Malloc up new buffer. */
994 skb = dev_alloc_skb(length + 2);
995 if (skb == NULL) {
996 if (net_debug) /* I don't think we want to do this to a stressed system */
997 printk("%s: Memory squeeze, dropping packet.\n", dev->name);
998 lp->stats.rx_dropped++;
999
1000 /* AKPM: advance bp to the next frame */
1001 skip_this_frame:
1002 bp += (length + 3) & ~3;
1003 if (bp >= lp->end_dma_buff) bp -= lp->dmasize*1024;
1004 lp->rx_dma_ptr = bp;
1005 return;
1006 }
1007 skb_reserve(skb, 2); /* longword align L3 header */
1008 skb->dev = dev;
1009
1010 if (bp + length > lp->end_dma_buff) {
1011 int semi_cnt = lp->end_dma_buff - bp;
1012 memcpy(skb_put(skb,semi_cnt), bp, semi_cnt);
1013 memcpy(skb_put(skb,length - semi_cnt), lp->dma_buff,
1014 length - semi_cnt);
1015 } else {
1016 memcpy(skb_put(skb,length), bp, length);
1017 }
1018 bp += (length + 3) & ~3;
1019 if (bp >= lp->end_dma_buff) bp -= lp->dmasize*1024;
1020 lp->rx_dma_ptr = bp;
1021
1022 if (net_debug > 3) {
1023 printk( "%s: received %d byte DMA packet of type %x\n",
1024 dev->name, length,
1025 (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]);
1026 }
1027 skb->protocol=eth_type_trans(skb,dev);
1028 netif_rx(skb);
1029 dev->last_rx = jiffies;
1030 lp->stats.rx_packets++;
1031 lp->stats.rx_bytes += length;
1032 }
1033
1034 #endif /* ALLOW_DMA */
1035
1036 void __init reset_chip(struct net_device *dev)
1037 {
1038 #if !defined(CONFIG_MACH_IXDP2351) && !defined(CONFIG_ARCH_IXDP2X01)
1039 struct net_local *lp = netdev_priv(dev);
1040 int ioaddr = dev->base_addr;
1041 #endif
1042 int reset_start_time;
1043
1044 writereg(dev, PP_SelfCTL, readreg(dev, PP_SelfCTL) | POWER_ON_RESET);
1045
1046 /* wait 30 ms */
1047 msleep(30);
1048
1049 #if !defined(CONFIG_MACH_IXDP2351) && !defined(CONFIG_ARCH_IXDP2X01)
1050 if (lp->chip_type != CS8900) {
1051 /* Hardware problem requires PNP registers to be reconfigured after a reset */
1052 writeword(ioaddr, ADD_PORT, PP_CS8920_ISAINT);
1053 outb(dev->irq, ioaddr + DATA_PORT);
1054 outb(0, ioaddr + DATA_PORT + 1);
1055
1056 writeword(ioaddr, ADD_PORT, PP_CS8920_ISAMemB);
1057 outb((dev->mem_start >> 16) & 0xff, ioaddr + DATA_PORT);
1058 outb((dev->mem_start >> 8) & 0xff, ioaddr + DATA_PORT + 1);
1059 }
1060 #endif /* IXDP2x01 */
1061
1062 /* Wait until the chip is reset */
1063 reset_start_time = jiffies;
1064 while( (readreg(dev, PP_SelfST) & INIT_DONE) == 0 && jiffies - reset_start_time < 2)
1065 ;
1066 }
1067
1068 \f
1069 static void
1070 control_dc_dc(struct net_device *dev, int on_not_off)
1071 {
1072 struct net_local *lp = netdev_priv(dev);
1073 unsigned int selfcontrol;
1074 int timenow = jiffies;
1075 /* control the DC to DC convertor in the SelfControl register.
1076 Note: This is hooked up to a general purpose pin, might not
1077 always be a DC to DC convertor. */
1078
1079 selfcontrol = HCB1_ENBL; /* Enable the HCB1 bit as an output */
1080 if (((lp->adapter_cnf & A_CNF_DC_DC_POLARITY) != 0) ^ on_not_off)
1081 selfcontrol |= HCB1;
1082 else
1083 selfcontrol &= ~HCB1;
1084 writereg(dev, PP_SelfCTL, selfcontrol);
1085
1086 /* Wait for the DC/DC converter to power up - 500ms */
1087 while (jiffies - timenow < HZ)
1088 ;
1089 }
1090
1091 #define DETECTED_NONE 0
1092 #define DETECTED_RJ45H 1
1093 #define DETECTED_RJ45F 2
1094 #define DETECTED_AUI 3
1095 #define DETECTED_BNC 4
1096
1097 static int
1098 detect_tp(struct net_device *dev)
1099 {
1100 struct net_local *lp = netdev_priv(dev);
1101 int timenow = jiffies;
1102 int fdx;
1103
1104 if (net_debug > 1) printk("%s: Attempting TP\n", dev->name);
1105
1106 /* If connected to another full duplex capable 10-Base-T card the link pulses
1107 seem to be lost when the auto detect bit in the LineCTL is set.
1108 To overcome this the auto detect bit will be cleared whilst testing the
1109 10-Base-T interface. This would not be necessary for the sparrow chip but
1110 is simpler to do it anyway. */
1111 writereg(dev, PP_LineCTL, lp->linectl &~ AUI_ONLY);
1112 control_dc_dc(dev, 0);
1113
1114 /* Delay for the hardware to work out if the TP cable is present - 150ms */
1115 for (timenow = jiffies; jiffies - timenow < 15; )
1116 ;
1117 if ((readreg(dev, PP_LineST) & LINK_OK) == 0)
1118 return DETECTED_NONE;
1119
1120 if (lp->chip_type == CS8900) {
1121 switch (lp->force & 0xf0) {
1122 #if 0
1123 case FORCE_AUTO:
1124 printk("%s: cs8900 doesn't autonegotiate\n",dev->name);
1125 return DETECTED_NONE;
1126 #endif
1127 /* CS8900 doesn't support AUTO, change to HALF*/
1128 case FORCE_AUTO:
1129 lp->force &= ~FORCE_AUTO;
1130 lp->force |= FORCE_HALF;
1131 break;
1132 case FORCE_HALF:
1133 break;
1134 case FORCE_FULL:
1135 writereg(dev, PP_TestCTL, readreg(dev, PP_TestCTL) | FDX_8900);
1136 break;
1137 }
1138 fdx = readreg(dev, PP_TestCTL) & FDX_8900;
1139 } else {
1140 switch (lp->force & 0xf0) {
1141 case FORCE_AUTO:
1142 lp->auto_neg_cnf = AUTO_NEG_ENABLE;
1143 break;
1144 case FORCE_HALF:
1145 lp->auto_neg_cnf = 0;
1146 break;
1147 case FORCE_FULL:
1148 lp->auto_neg_cnf = RE_NEG_NOW | ALLOW_FDX;
1149 break;
1150 }
1151
1152 writereg(dev, PP_AutoNegCTL, lp->auto_neg_cnf & AUTO_NEG_MASK);
1153
1154 if ((lp->auto_neg_cnf & AUTO_NEG_BITS) == AUTO_NEG_ENABLE) {
1155 printk(KERN_INFO "%s: negotiating duplex...\n",dev->name);
1156 while (readreg(dev, PP_AutoNegST) & AUTO_NEG_BUSY) {
1157 if (jiffies - timenow > 4000) {
1158 printk(KERN_ERR "**** Full / half duplex auto-negotiation timed out ****\n");
1159 break;
1160 }
1161 }
1162 }
1163 fdx = readreg(dev, PP_AutoNegST) & FDX_ACTIVE;
1164 }
1165 if (fdx)
1166 return DETECTED_RJ45F;
1167 else
1168 return DETECTED_RJ45H;
1169 }
1170
1171 /* send a test packet - return true if carrier bits are ok */
1172 static int
1173 send_test_pkt(struct net_device *dev)
1174 {
1175 char test_packet[] = { 0,0,0,0,0,0, 0,0,0,0,0,0,
1176 0, 46, /* A 46 in network order */
1177 0, 0, /* DSAP=0 & SSAP=0 fields */
1178 0xf3, 0 /* Control (Test Req + P bit set) */ };
1179 long timenow = jiffies;
1180
1181 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_TX_ON);
1182
1183 memcpy(test_packet, dev->dev_addr, ETH_ALEN);
1184 memcpy(test_packet+ETH_ALEN, dev->dev_addr, ETH_ALEN);
1185
1186 writeword(dev->base_addr, TX_CMD_PORT, TX_AFTER_ALL);
1187 writeword(dev->base_addr, TX_LEN_PORT, ETH_ZLEN);
1188
1189 /* Test to see if the chip has allocated memory for the packet */
1190 while (jiffies - timenow < 5)
1191 if (readreg(dev, PP_BusST) & READY_FOR_TX_NOW)
1192 break;
1193 if (jiffies - timenow >= 5)
1194 return 0; /* this shouldn't happen */
1195
1196 /* Write the contents of the packet */
1197 writewords(dev->base_addr, TX_FRAME_PORT,test_packet,(ETH_ZLEN+1) >>1);
1198
1199 if (net_debug > 1) printk("Sending test packet ");
1200 /* wait a couple of jiffies for packet to be received */
1201 for (timenow = jiffies; jiffies - timenow < 3; )
1202 ;
1203 if ((readreg(dev, PP_TxEvent) & TX_SEND_OK_BITS) == TX_OK) {
1204 if (net_debug > 1) printk("succeeded\n");
1205 return 1;
1206 }
1207 if (net_debug > 1) printk("failed\n");
1208 return 0;
1209 }
1210
1211
1212 static int
1213 detect_aui(struct net_device *dev)
1214 {
1215 struct net_local *lp = netdev_priv(dev);
1216
1217 if (net_debug > 1) printk("%s: Attempting AUI\n", dev->name);
1218 control_dc_dc(dev, 0);
1219
1220 writereg(dev, PP_LineCTL, (lp->linectl &~ AUTO_AUI_10BASET) | AUI_ONLY);
1221
1222 if (send_test_pkt(dev))
1223 return DETECTED_AUI;
1224 else
1225 return DETECTED_NONE;
1226 }
1227
1228 static int
1229 detect_bnc(struct net_device *dev)
1230 {
1231 struct net_local *lp = netdev_priv(dev);
1232
1233 if (net_debug > 1) printk("%s: Attempting BNC\n", dev->name);
1234 control_dc_dc(dev, 1);
1235
1236 writereg(dev, PP_LineCTL, (lp->linectl &~ AUTO_AUI_10BASET) | AUI_ONLY);
1237
1238 if (send_test_pkt(dev))
1239 return DETECTED_BNC;
1240 else
1241 return DETECTED_NONE;
1242 }
1243
1244 \f
1245 static void
1246 write_irq(struct net_device *dev, int chip_type, int irq)
1247 {
1248 int i;
1249
1250 if (chip_type == CS8900) {
1251 /* Search the mapping table for the corresponding IRQ pin. */
1252 for (i = 0; i != sizeof(cs8900_irq_map)/sizeof(cs8900_irq_map[0]); i++)
1253 if (cs8900_irq_map[i] == irq)
1254 break;
1255 /* Not found */
1256 if (i == sizeof(cs8900_irq_map)/sizeof(cs8900_irq_map[0]))
1257 i = 3;
1258 writereg(dev, PP_CS8900_ISAINT, i);
1259 } else {
1260 writereg(dev, PP_CS8920_ISAINT, irq);
1261 }
1262 }
1263
1264 /* Open/initialize the board. This is called (in the current kernel)
1265 sometime after booting when the 'ifconfig' program is run.
1266
1267 This routine should set everything up anew at each open, even
1268 registers that "should" only need to be set once at boot, so that
1269 there is non-reboot way to recover if something goes wrong.
1270 */
1271
1272 /* AKPM: do we need to do any locking here? */
1273
1274 static int
1275 net_open(struct net_device *dev)
1276 {
1277 struct net_local *lp = netdev_priv(dev);
1278 int result = 0;
1279 int i;
1280 int ret;
1281
1282 #if !defined(CONFIG_SH_HICOSH4) && !defined(CONFIG_ARCH_PNX010X) /* uses irq#1, so this won't work */
1283 if (dev->irq < 2) {
1284 /* Allow interrupts to be generated by the chip */
1285 /* Cirrus' release had this: */
1286 #if 0
1287 writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ );
1288 #endif
1289 /* And 2.3.47 had this: */
1290 writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
1291
1292 for (i = 2; i < CS8920_NO_INTS; i++) {
1293 if ((1 << i) & lp->irq_map) {
1294 if (request_irq(i, net_interrupt, 0, dev->name, dev) == 0) {
1295 dev->irq = i;
1296 write_irq(dev, lp->chip_type, i);
1297 /* writereg(dev, PP_BufCFG, GENERATE_SW_INTERRUPT); */
1298 break;
1299 }
1300 }
1301 }
1302
1303 if (i >= CS8920_NO_INTS) {
1304 writereg(dev, PP_BusCTL, 0); /* disable interrupts. */
1305 printk(KERN_ERR "cs89x0: can't get an interrupt\n");
1306 ret = -EAGAIN;
1307 goto bad_out;
1308 }
1309 }
1310 else
1311 #endif
1312 {
1313 #if !defined(CONFIG_MACH_IXDP2351) && !defined(CONFIG_ARCH_IXDP2X01) && !defined(CONFIG_ARCH_PNX010X)
1314 if (((1 << dev->irq) & lp->irq_map) == 0) {
1315 printk(KERN_ERR "%s: IRQ %d is not in our map of allowable IRQs, which is %x\n",
1316 dev->name, dev->irq, lp->irq_map);
1317 ret = -EAGAIN;
1318 goto bad_out;
1319 }
1320 #endif
1321 /* FIXME: Cirrus' release had this: */
1322 writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ );
1323 /* And 2.3.47 had this: */
1324 #if 0
1325 writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
1326 #endif
1327 write_irq(dev, lp->chip_type, dev->irq);
1328 ret = request_irq(dev->irq, &net_interrupt, 0, dev->name, dev);
1329 if (ret) {
1330 if (net_debug)
1331 printk(KERN_DEBUG "cs89x0: request_irq(%d) failed\n", dev->irq);
1332 goto bad_out;
1333 }
1334 }
1335
1336 #if ALLOW_DMA
1337 if (lp->use_dma) {
1338 if (lp->isa_config & ANY_ISA_DMA) {
1339 unsigned long flags;
1340 lp->dma_buff = (unsigned char *)__get_dma_pages(GFP_KERNEL,
1341 get_order(lp->dmasize * 1024));
1342
1343 if (!lp->dma_buff) {
1344 printk(KERN_ERR "%s: cannot get %dK memory for DMA\n", dev->name, lp->dmasize);
1345 goto release_irq;
1346 }
1347 if (net_debug > 1) {
1348 printk( "%s: dma %lx %lx\n",
1349 dev->name,
1350 (unsigned long)lp->dma_buff,
1351 (unsigned long)isa_virt_to_bus(lp->dma_buff));
1352 }
1353 if ((unsigned long) lp->dma_buff >= MAX_DMA_ADDRESS ||
1354 !dma_page_eq(lp->dma_buff, lp->dma_buff+lp->dmasize*1024-1)) {
1355 printk(KERN_ERR "%s: not usable as DMA buffer\n", dev->name);
1356 goto release_irq;
1357 }
1358 memset(lp->dma_buff, 0, lp->dmasize * 1024); /* Why? */
1359 if (request_dma(dev->dma, dev->name)) {
1360 printk(KERN_ERR "%s: cannot get dma channel %d\n", dev->name, dev->dma);
1361 goto release_irq;
1362 }
1363 write_dma(dev, lp->chip_type, dev->dma);
1364 lp->rx_dma_ptr = lp->dma_buff;
1365 lp->end_dma_buff = lp->dma_buff + lp->dmasize*1024;
1366 spin_lock_irqsave(&lp->lock, flags);
1367 disable_dma(dev->dma);
1368 clear_dma_ff(dev->dma);
1369 set_dma_mode(dev->dma, 0x14); /* auto_init as well */
1370 set_dma_addr(dev->dma, isa_virt_to_bus(lp->dma_buff));
1371 set_dma_count(dev->dma, lp->dmasize*1024);
1372 enable_dma(dev->dma);
1373 spin_unlock_irqrestore(&lp->lock, flags);
1374 }
1375 }
1376 #endif /* ALLOW_DMA */
1377
1378 /* set the Ethernet address */
1379 for (i=0; i < ETH_ALEN/2; i++)
1380 writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8));
1381
1382 /* while we're testing the interface, leave interrupts disabled */
1383 writereg(dev, PP_BusCTL, MEMORY_ON);
1384
1385 /* Set the LineCTL quintuplet based on adapter configuration read from EEPROM */
1386 if ((lp->adapter_cnf & A_CNF_EXTND_10B_2) && (lp->adapter_cnf & A_CNF_LOW_RX_SQUELCH))
1387 lp->linectl = LOW_RX_SQUELCH;
1388 else
1389 lp->linectl = 0;
1390
1391 /* check to make sure that they have the "right" hardware available */
1392 switch(lp->adapter_cnf & A_CNF_MEDIA_TYPE) {
1393 case A_CNF_MEDIA_10B_T: result = lp->adapter_cnf & A_CNF_10B_T; break;
1394 case A_CNF_MEDIA_AUI: result = lp->adapter_cnf & A_CNF_AUI; break;
1395 case A_CNF_MEDIA_10B_2: result = lp->adapter_cnf & A_CNF_10B_2; break;
1396 default: result = lp->adapter_cnf & (A_CNF_10B_T | A_CNF_AUI | A_CNF_10B_2);
1397 }
1398 #ifdef CONFIG_ARCH_PNX010X
1399 result = A_CNF_10B_T;
1400 #endif
1401 if (!result) {
1402 printk(KERN_ERR "%s: EEPROM is configured for unavailable media\n", dev->name);
1403 release_irq:
1404 #if ALLOW_DMA
1405 release_dma_buff(lp);
1406 #endif
1407 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) & ~(SERIAL_TX_ON | SERIAL_RX_ON));
1408 free_irq(dev->irq, dev);
1409 ret = -EAGAIN;
1410 goto bad_out;
1411 }
1412
1413 /* set the hardware to the configured choice */
1414 switch(lp->adapter_cnf & A_CNF_MEDIA_TYPE) {
1415 case A_CNF_MEDIA_10B_T:
1416 result = detect_tp(dev);
1417 if (result==DETECTED_NONE) {
1418 printk(KERN_WARNING "%s: 10Base-T (RJ-45) has no cable\n", dev->name);
1419 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1420 result = DETECTED_RJ45H; /* Yes! I don't care if I see a link pulse */
1421 }
1422 break;
1423 case A_CNF_MEDIA_AUI:
1424 result = detect_aui(dev);
1425 if (result==DETECTED_NONE) {
1426 printk(KERN_WARNING "%s: 10Base-5 (AUI) has no cable\n", dev->name);
1427 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1428 result = DETECTED_AUI; /* Yes! I don't care if I see a carrrier */
1429 }
1430 break;
1431 case A_CNF_MEDIA_10B_2:
1432 result = detect_bnc(dev);
1433 if (result==DETECTED_NONE) {
1434 printk(KERN_WARNING "%s: 10Base-2 (BNC) has no cable\n", dev->name);
1435 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1436 result = DETECTED_BNC; /* Yes! I don't care if I can xmit a packet */
1437 }
1438 break;
1439 case A_CNF_MEDIA_AUTO:
1440 writereg(dev, PP_LineCTL, lp->linectl | AUTO_AUI_10BASET);
1441 if (lp->adapter_cnf & A_CNF_10B_T)
1442 if ((result = detect_tp(dev)) != DETECTED_NONE)
1443 break;
1444 if (lp->adapter_cnf & A_CNF_AUI)
1445 if ((result = detect_aui(dev)) != DETECTED_NONE)
1446 break;
1447 if (lp->adapter_cnf & A_CNF_10B_2)
1448 if ((result = detect_bnc(dev)) != DETECTED_NONE)
1449 break;
1450 printk(KERN_ERR "%s: no media detected\n", dev->name);
1451 goto release_irq;
1452 }
1453 switch(result) {
1454 case DETECTED_NONE:
1455 printk(KERN_ERR "%s: no network cable attached to configured media\n", dev->name);
1456 goto release_irq;
1457 case DETECTED_RJ45H:
1458 printk(KERN_INFO "%s: using half-duplex 10Base-T (RJ-45)\n", dev->name);
1459 break;
1460 case DETECTED_RJ45F:
1461 printk(KERN_INFO "%s: using full-duplex 10Base-T (RJ-45)\n", dev->name);
1462 break;
1463 case DETECTED_AUI:
1464 printk(KERN_INFO "%s: using 10Base-5 (AUI)\n", dev->name);
1465 break;
1466 case DETECTED_BNC:
1467 printk(KERN_INFO "%s: using 10Base-2 (BNC)\n", dev->name);
1468 break;
1469 }
1470
1471 /* Turn on both receive and transmit operations */
1472 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_RX_ON | SERIAL_TX_ON);
1473
1474 /* Receive only error free packets addressed to this card */
1475 lp->rx_mode = 0;
1476 writereg(dev, PP_RxCTL, DEF_RX_ACCEPT);
1477
1478 lp->curr_rx_cfg = RX_OK_ENBL | RX_CRC_ERROR_ENBL;
1479
1480 if (lp->isa_config & STREAM_TRANSFER)
1481 lp->curr_rx_cfg |= RX_STREAM_ENBL;
1482 #if ALLOW_DMA
1483 set_dma_cfg(dev);
1484 #endif
1485 writereg(dev, PP_RxCFG, lp->curr_rx_cfg);
1486
1487 writereg(dev, PP_TxCFG, TX_LOST_CRS_ENBL | TX_SQE_ERROR_ENBL | TX_OK_ENBL |
1488 TX_LATE_COL_ENBL | TX_JBR_ENBL | TX_ANY_COL_ENBL | TX_16_COL_ENBL);
1489
1490 writereg(dev, PP_BufCFG, READY_FOR_TX_ENBL | RX_MISS_COUNT_OVRFLOW_ENBL |
1491 #if ALLOW_DMA
1492 dma_bufcfg(dev) |
1493 #endif
1494 TX_COL_COUNT_OVRFLOW_ENBL | TX_UNDERRUN_ENBL);
1495
1496 /* now that we've got our act together, enable everything */
1497 writereg(dev, PP_BusCTL, ENABLE_IRQ
1498 | (dev->mem_start?MEMORY_ON : 0) /* turn memory on */
1499 #if ALLOW_DMA
1500 | dma_busctl(dev)
1501 #endif
1502 );
1503 netif_start_queue(dev);
1504 if (net_debug > 1)
1505 printk("cs89x0: net_open() succeeded\n");
1506 return 0;
1507 bad_out:
1508 return ret;
1509 }
1510
1511 static void net_timeout(struct net_device *dev)
1512 {
1513 /* If we get here, some higher level has decided we are broken.
1514 There should really be a "kick me" function call instead. */
1515 if (net_debug > 0) printk("%s: transmit timed out, %s?\n", dev->name,
1516 tx_done(dev) ? "IRQ conflict ?" : "network cable problem");
1517 /* Try to restart the adaptor. */
1518 netif_wake_queue(dev);
1519 }
1520
1521 static int net_send_packet(struct sk_buff *skb, struct net_device *dev)
1522 {
1523 struct net_local *lp = netdev_priv(dev);
1524
1525 if (net_debug > 3) {
1526 printk("%s: sent %d byte packet of type %x\n",
1527 dev->name, skb->len,
1528 (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]);
1529 }
1530
1531 /* keep the upload from being interrupted, since we
1532 ask the chip to start transmitting before the
1533 whole packet has been completely uploaded. */
1534
1535 spin_lock_irq(&lp->lock);
1536 netif_stop_queue(dev);
1537
1538 /* initiate a transmit sequence */
1539 writeword(dev->base_addr, TX_CMD_PORT, lp->send_cmd);
1540 writeword(dev->base_addr, TX_LEN_PORT, skb->len);
1541
1542 /* Test to see if the chip has allocated memory for the packet */
1543 if ((readreg(dev, PP_BusST) & READY_FOR_TX_NOW) == 0) {
1544 /*
1545 * Gasp! It hasn't. But that shouldn't happen since
1546 * we're waiting for TxOk, so return 1 and requeue this packet.
1547 */
1548
1549 spin_unlock_irq(&lp->lock);
1550 if (net_debug) printk("cs89x0: Tx buffer not free!\n");
1551 return 1;
1552 }
1553 /* Write the contents of the packet */
1554 writewords(dev->base_addr, TX_FRAME_PORT,skb->data,(skb->len+1) >>1);
1555 spin_unlock_irq(&lp->lock);
1556 lp->stats.tx_bytes += skb->len;
1557 dev->trans_start = jiffies;
1558 dev_kfree_skb (skb);
1559
1560 /*
1561 * We DO NOT call netif_wake_queue() here.
1562 * We also DO NOT call netif_start_queue().
1563 *
1564 * Either of these would cause another bottom half run through
1565 * net_send_packet() before this packet has fully gone out. That causes
1566 * us to hit the "Gasp!" above and the send is rescheduled. it runs like
1567 * a dog. We just return and wait for the Tx completion interrupt handler
1568 * to restart the netdevice layer
1569 */
1570
1571 return 0;
1572 }
1573 \f
1574 /* The typical workload of the driver:
1575 Handle the network interface interrupts. */
1576
1577 static irqreturn_t net_interrupt(int irq, void *dev_id, struct pt_regs * regs)
1578 {
1579 struct net_device *dev = dev_id;
1580 struct net_local *lp;
1581 int ioaddr, status;
1582 int handled = 0;
1583
1584 ioaddr = dev->base_addr;
1585 lp = netdev_priv(dev);
1586
1587 /* we MUST read all the events out of the ISQ, otherwise we'll never
1588 get interrupted again. As a consequence, we can't have any limit
1589 on the number of times we loop in the interrupt handler. The
1590 hardware guarantees that eventually we'll run out of events. Of
1591 course, if you're on a slow machine, and packets are arriving
1592 faster than you can read them off, you're screwed. Hasta la
1593 vista, baby! */
1594 while ((status = readword(dev->base_addr, ISQ_PORT))) {
1595 if (net_debug > 4)printk("%s: event=%04x\n", dev->name, status);
1596 handled = 1;
1597 switch(status & ISQ_EVENT_MASK) {
1598 case ISQ_RECEIVER_EVENT:
1599 /* Got a packet(s). */
1600 net_rx(dev);
1601 break;
1602 case ISQ_TRANSMITTER_EVENT:
1603 lp->stats.tx_packets++;
1604 netif_wake_queue(dev); /* Inform upper layers. */
1605 if ((status & ( TX_OK |
1606 TX_LOST_CRS |
1607 TX_SQE_ERROR |
1608 TX_LATE_COL |
1609 TX_16_COL)) != TX_OK) {
1610 if ((status & TX_OK) == 0) lp->stats.tx_errors++;
1611 if (status & TX_LOST_CRS) lp->stats.tx_carrier_errors++;
1612 if (status & TX_SQE_ERROR) lp->stats.tx_heartbeat_errors++;
1613 if (status & TX_LATE_COL) lp->stats.tx_window_errors++;
1614 if (status & TX_16_COL) lp->stats.tx_aborted_errors++;
1615 }
1616 break;
1617 case ISQ_BUFFER_EVENT:
1618 if (status & READY_FOR_TX) {
1619 /* we tried to transmit a packet earlier,
1620 but inexplicably ran out of buffers.
1621 That shouldn't happen since we only ever
1622 load one packet. Shrug. Do the right
1623 thing anyway. */
1624 netif_wake_queue(dev); /* Inform upper layers. */
1625 }
1626 if (status & TX_UNDERRUN) {
1627 if (net_debug > 0) printk("%s: transmit underrun\n", dev->name);
1628 lp->send_underrun++;
1629 if (lp->send_underrun == 3) lp->send_cmd = TX_AFTER_381;
1630 else if (lp->send_underrun == 6) lp->send_cmd = TX_AFTER_ALL;
1631 /* transmit cycle is done, although
1632 frame wasn't transmitted - this
1633 avoids having to wait for the upper
1634 layers to timeout on us, in the
1635 event of a tx underrun */
1636 netif_wake_queue(dev); /* Inform upper layers. */
1637 }
1638 #if ALLOW_DMA
1639 if (lp->use_dma && (status & RX_DMA)) {
1640 int count = readreg(dev, PP_DmaFrameCnt);
1641 while(count) {
1642 if (net_debug > 5)
1643 printk("%s: receiving %d DMA frames\n", dev->name, count);
1644 if (net_debug > 2 && count >1)
1645 printk("%s: receiving %d DMA frames\n", dev->name, count);
1646 dma_rx(dev);
1647 if (--count == 0)
1648 count = readreg(dev, PP_DmaFrameCnt);
1649 if (net_debug > 2 && count > 0)
1650 printk("%s: continuing with %d DMA frames\n", dev->name, count);
1651 }
1652 }
1653 #endif
1654 break;
1655 case ISQ_RX_MISS_EVENT:
1656 lp->stats.rx_missed_errors += (status >>6);
1657 break;
1658 case ISQ_TX_COL_EVENT:
1659 lp->stats.collisions += (status >>6);
1660 break;
1661 }
1662 }
1663 return IRQ_RETVAL(handled);
1664 }
1665
1666 static void
1667 count_rx_errors(int status, struct net_local *lp)
1668 {
1669 lp->stats.rx_errors++;
1670 if (status & RX_RUNT) lp->stats.rx_length_errors++;
1671 if (status & RX_EXTRA_DATA) lp->stats.rx_length_errors++;
1672 if (status & RX_CRC_ERROR) if (!(status & (RX_EXTRA_DATA|RX_RUNT)))
1673 /* per str 172 */
1674 lp->stats.rx_crc_errors++;
1675 if (status & RX_DRIBBLE) lp->stats.rx_frame_errors++;
1676 return;
1677 }
1678
1679 /* We have a good packet(s), get it/them out of the buffers. */
1680 static void
1681 net_rx(struct net_device *dev)
1682 {
1683 struct net_local *lp = netdev_priv(dev);
1684 struct sk_buff *skb;
1685 int status, length;
1686
1687 int ioaddr = dev->base_addr;
1688 status = readword(ioaddr, RX_FRAME_PORT);
1689 length = readword(ioaddr, RX_FRAME_PORT);
1690
1691 if ((status & RX_OK) == 0) {
1692 count_rx_errors(status, lp);
1693 return;
1694 }
1695
1696 /* Malloc up new buffer. */
1697 skb = dev_alloc_skb(length + 2);
1698 if (skb == NULL) {
1699 #if 0 /* Again, this seems a cruel thing to do */
1700 printk(KERN_WARNING "%s: Memory squeeze, dropping packet.\n", dev->name);
1701 #endif
1702 lp->stats.rx_dropped++;
1703 return;
1704 }
1705 skb_reserve(skb, 2); /* longword align L3 header */
1706 skb->dev = dev;
1707
1708 readwords(ioaddr, RX_FRAME_PORT, skb_put(skb, length), length >> 1);
1709 if (length & 1)
1710 skb->data[length-1] = readword(ioaddr, RX_FRAME_PORT);
1711
1712 if (net_debug > 3) {
1713 printk( "%s: received %d byte packet of type %x\n",
1714 dev->name, length,
1715 (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]);
1716 }
1717
1718 skb->protocol=eth_type_trans(skb,dev);
1719 netif_rx(skb);
1720 dev->last_rx = jiffies;
1721 lp->stats.rx_packets++;
1722 lp->stats.rx_bytes += length;
1723 }
1724
1725 #if ALLOW_DMA
1726 static void release_dma_buff(struct net_local *lp)
1727 {
1728 if (lp->dma_buff) {
1729 free_pages((unsigned long)(lp->dma_buff), get_order(lp->dmasize * 1024));
1730 lp->dma_buff = NULL;
1731 }
1732 }
1733 #endif
1734
1735 /* The inverse routine to net_open(). */
1736 static int
1737 net_close(struct net_device *dev)
1738 {
1739 #if ALLOW_DMA
1740 struct net_local *lp = netdev_priv(dev);
1741 #endif
1742
1743 netif_stop_queue(dev);
1744
1745 writereg(dev, PP_RxCFG, 0);
1746 writereg(dev, PP_TxCFG, 0);
1747 writereg(dev, PP_BufCFG, 0);
1748 writereg(dev, PP_BusCTL, 0);
1749
1750 free_irq(dev->irq, dev);
1751
1752 #if ALLOW_DMA
1753 if (lp->use_dma && lp->dma) {
1754 free_dma(dev->dma);
1755 release_dma_buff(lp);
1756 }
1757 #endif
1758
1759 /* Update the statistics here. */
1760 return 0;
1761 }
1762
1763 /* Get the current statistics. This may be called with the card open or
1764 closed. */
1765 static struct net_device_stats *
1766 net_get_stats(struct net_device *dev)
1767 {
1768 struct net_local *lp = netdev_priv(dev);
1769 unsigned long flags;
1770
1771 spin_lock_irqsave(&lp->lock, flags);
1772 /* Update the statistics from the device registers. */
1773 lp->stats.rx_missed_errors += (readreg(dev, PP_RxMiss) >> 6);
1774 lp->stats.collisions += (readreg(dev, PP_TxCol) >> 6);
1775 spin_unlock_irqrestore(&lp->lock, flags);
1776
1777 return &lp->stats;
1778 }
1779
1780 static void set_multicast_list(struct net_device *dev)
1781 {
1782 struct net_local *lp = netdev_priv(dev);
1783 unsigned long flags;
1784
1785 spin_lock_irqsave(&lp->lock, flags);
1786 if(dev->flags&IFF_PROMISC)
1787 {
1788 lp->rx_mode = RX_ALL_ACCEPT;
1789 }
1790 else if((dev->flags&IFF_ALLMULTI)||dev->mc_list)
1791 {
1792 /* The multicast-accept list is initialized to accept-all, and we
1793 rely on higher-level filtering for now. */
1794 lp->rx_mode = RX_MULTCAST_ACCEPT;
1795 }
1796 else
1797 lp->rx_mode = 0;
1798
1799 writereg(dev, PP_RxCTL, DEF_RX_ACCEPT | lp->rx_mode);
1800
1801 /* in promiscuous mode, we accept errored packets, so we have to enable interrupts on them also */
1802 writereg(dev, PP_RxCFG, lp->curr_rx_cfg |
1803 (lp->rx_mode == RX_ALL_ACCEPT? (RX_CRC_ERROR_ENBL|RX_RUNT_ENBL|RX_EXTRA_DATA_ENBL) : 0));
1804 spin_unlock_irqrestore(&lp->lock, flags);
1805 }
1806
1807
1808 static int set_mac_address(struct net_device *dev, void *p)
1809 {
1810 int i;
1811 struct sockaddr *addr = p;
1812
1813
1814 if (netif_running(dev))
1815 return -EBUSY;
1816
1817 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1818
1819 if (net_debug) {
1820 printk("%s: Setting MAC address to ", dev->name);
1821 for (i = 0; i < dev->addr_len; i++)
1822 printk(" %2.2x", dev->dev_addr[i]);
1823 printk(".\n");
1824 }
1825 /* set the Ethernet address */
1826 for (i=0; i < ETH_ALEN/2; i++)
1827 writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8));
1828
1829 return 0;
1830 }
1831
1832 #ifdef MODULE
1833
1834 static struct net_device *dev_cs89x0;
1835
1836 /*
1837 * Support the 'debug' module parm even if we're compiled for non-debug to
1838 * avoid breaking someone's startup scripts
1839 */
1840
1841 static int io;
1842 static int irq;
1843 static int debug;
1844 static char media[8];
1845 static int duplex=-1;
1846
1847 static int use_dma; /* These generate unused var warnings if ALLOW_DMA = 0 */
1848 static int dma;
1849 static int dmasize=16; /* or 64 */
1850
1851 module_param(io, int, 0);
1852 module_param(irq, int, 0);
1853 module_param(debug, int, 0);
1854 module_param_string(media, media, sizeof(media), 0);
1855 module_param(duplex, int, 0);
1856 module_param(dma , int, 0);
1857 module_param(dmasize , int, 0);
1858 module_param(use_dma , int, 0);
1859 MODULE_PARM_DESC(io, "cs89x0 I/O base address");
1860 MODULE_PARM_DESC(irq, "cs89x0 IRQ number");
1861 #if DEBUGGING
1862 MODULE_PARM_DESC(debug, "cs89x0 debug level (0-6)");
1863 #else
1864 MODULE_PARM_DESC(debug, "(ignored)");
1865 #endif
1866 MODULE_PARM_DESC(media, "Set cs89x0 adapter(s) media type(s) (rj45,bnc,aui)");
1867 /* No other value than -1 for duplex seems to be currently interpreted */
1868 MODULE_PARM_DESC(duplex, "(ignored)");
1869 #if ALLOW_DMA
1870 MODULE_PARM_DESC(dma , "cs89x0 ISA DMA channel; ignored if use_dma=0");
1871 MODULE_PARM_DESC(dmasize , "cs89x0 DMA size in kB (16,64); ignored if use_dma=0");
1872 MODULE_PARM_DESC(use_dma , "cs89x0 using DMA (0-1)");
1873 #else
1874 MODULE_PARM_DESC(dma , "(ignored)");
1875 MODULE_PARM_DESC(dmasize , "(ignored)");
1876 MODULE_PARM_DESC(use_dma , "(ignored)");
1877 #endif
1878
1879 MODULE_AUTHOR("Mike Cruse, Russwll Nelson <nelson@crynwr.com>, Andrew Morton <andrewm@uow.edu.au>");
1880 MODULE_LICENSE("GPL");
1881
1882
1883 /*
1884 * media=t - specify media type
1885 or media=2
1886 or media=aui
1887 or medai=auto
1888 * duplex=0 - specify forced half/full/autonegotiate duplex
1889 * debug=# - debug level
1890
1891
1892 * Default Chip Configuration:
1893 * DMA Burst = enabled
1894 * IOCHRDY Enabled = enabled
1895 * UseSA = enabled
1896 * CS8900 defaults to half-duplex if not specified on command-line
1897 * CS8920 defaults to autoneg if not specified on command-line
1898 * Use reset defaults for other config parameters
1899
1900 * Assumptions:
1901 * media type specified is supported (circuitry is present)
1902 * if memory address is > 1MB, then required mem decode hw is present
1903 * if 10B-2, then agent other than driver will enable DC/DC converter
1904 (hw or software util)
1905
1906
1907 */
1908
1909 int
1910 init_module(void)
1911 {
1912 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
1913 struct net_local *lp;
1914 int ret = 0;
1915
1916 #if DEBUGGING
1917 net_debug = debug;
1918 #else
1919 debug = 0;
1920 #endif
1921 if (!dev)
1922 return -ENOMEM;
1923
1924 dev->irq = irq;
1925 dev->base_addr = io;
1926 lp = netdev_priv(dev);
1927
1928 #if ALLOW_DMA
1929 if (use_dma) {
1930 lp->use_dma = use_dma;
1931 lp->dma = dma;
1932 lp->dmasize = dmasize;
1933 }
1934 #endif
1935
1936 spin_lock_init(&lp->lock);
1937
1938 /* boy, they'd better get these right */
1939 if (!strcmp(media, "rj45"))
1940 lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T;
1941 else if (!strcmp(media, "aui"))
1942 lp->adapter_cnf = A_CNF_MEDIA_AUI | A_CNF_AUI;
1943 else if (!strcmp(media, "bnc"))
1944 lp->adapter_cnf = A_CNF_MEDIA_10B_2 | A_CNF_10B_2;
1945 else
1946 lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T;
1947
1948 if (duplex==-1)
1949 lp->auto_neg_cnf = AUTO_NEG_ENABLE;
1950
1951 if (io == 0) {
1952 printk(KERN_ERR "cs89x0.c: Module autoprobing not allowed.\n");
1953 printk(KERN_ERR "cs89x0.c: Append io=0xNNN\n");
1954 ret = -EPERM;
1955 goto out;
1956 } else if (io <= 0x1ff) {
1957 ret = -ENXIO;
1958 goto out;
1959 }
1960
1961 #if ALLOW_DMA
1962 if (use_dma && dmasize != 16 && dmasize != 64) {
1963 printk(KERN_ERR "cs89x0.c: dma size must be either 16K or 64K, not %dK\n", dmasize);
1964 ret = -EPERM;
1965 goto out;
1966 }
1967 #endif
1968 ret = cs89x0_probe1(dev, io, 1);
1969 if (ret)
1970 goto out;
1971
1972 dev_cs89x0 = dev;
1973 return 0;
1974 out:
1975 free_netdev(dev);
1976 return ret;
1977 }
1978
1979 void
1980 cleanup_module(void)
1981 {
1982 unregister_netdev(dev_cs89x0);
1983 writeword(dev_cs89x0->base_addr, ADD_PORT, PP_ChipID);
1984 release_region(dev_cs89x0->base_addr, NETCARD_IO_EXTENT);
1985 free_netdev(dev_cs89x0);
1986 }
1987 #endif /* MODULE */
1988 \f
1989 /*
1990 * Local variables:
1991 * version-control: t
1992 * kept-new-versions: 5
1993 * c-indent-level: 8
1994 * tab-width: 8
1995 * End:
1996 *
1997 */
Linux with added FPC-III support