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[PATCH] sched: reduce task_struct size
[linux-2.6/kmemtrace.git] / drivers / net / cs89x0.c
blob9774bb1b3e80a34ef486e9357ace4ba72eecdb6c
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/module.h>
104
105 /*
106 * Set this to zero to disable DMA code
107 *
108 * Note that even if DMA is turned off we still support the 'dma' and 'use_dma'
109 * module options so we don't break any startup scripts.
110 */
111 #ifndef CONFIG_ISA_DMA_API
112 #define ALLOW_DMA 0
113 #else
114 #define ALLOW_DMA 1
115 #endif
116
117 /*
118 * Set this to zero to remove all the debug statements via
119 * dead code elimination
120 */
121 #define DEBUGGING 1
122
123 /*
124 Sources:
125
126 Crynwr packet driver epktisa.
127
128 Crystal Semiconductor data sheets.
129
130 */
131
132 #include <linux/errno.h>
133 #include <linux/netdevice.h>
134 #include <linux/etherdevice.h>
135 #include <linux/kernel.h>
136 #include <linux/types.h>
137 #include <linux/fcntl.h>
138 #include <linux/interrupt.h>
139 #include <linux/ioport.h>
140 #include <linux/in.h>
141 #include <linux/skbuff.h>
142 #include <linux/slab.h>
143 #include <linux/spinlock.h>
144 #include <linux/string.h>
145 #include <linux/init.h>
146 #include <linux/bitops.h>
147 #include <linux/delay.h>
148
149 #include <asm/system.h>
150 #include <asm/io.h>
151 #include <asm/irq.h>
152 #if ALLOW_DMA
153 #include <asm/dma.h>
154 #endif
155
156 #include "cs89x0.h"
157
158 static char version[] __initdata =
159 "cs89x0.c: v2.4.3-pre1 Russell Nelson <nelson@crynwr.com>, Andrew Morton <andrewm@uow.edu.au>\n";
160
161 #define DRV_NAME "cs89x0"
162
163 /* First, a few definitions that the brave might change.
164 A zero-terminated list of I/O addresses to be probed. Some special flags..
165 Addr & 1 = Read back the address port, look for signature and reset
166 the page window before probing
167 Addr & 3 = Reset the page window and probe
168 The CLPS eval board has the Cirrus chip at 0x80090300, in ARM IO space,
169 but it is possible that a Cirrus board could be plugged into the ISA
170 slots. */
171 /* The cs8900 has 4 IRQ pins, software selectable. cs8900_irq_map maps
172 them to system IRQ numbers. This mapping is card specific and is set to
173 the configuration of the Cirrus Eval board for this chip. */
174 #ifdef CONFIG_ARCH_CLPS7500
175 static unsigned int netcard_portlist[] __initdata =
176 { 0x80090303, 0x300, 0x320, 0x340, 0x360, 0x200, 0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x2e0, 0};
177 static unsigned int cs8900_irq_map[] = {12,0,0,0};
178 #elif defined(CONFIG_SH_HICOSH4)
179 static unsigned int netcard_portlist[] __initdata =
180 { 0x0300, 0};
181 static unsigned int cs8900_irq_map[] = {1,0,0,0};
182 #elif defined(CONFIG_MACH_IXDP2351)
183 static unsigned int netcard_portlist[] __initdata = {IXDP2351_VIRT_CS8900_BASE, 0};
184 static unsigned int cs8900_irq_map[] = {IRQ_IXDP2351_CS8900, 0, 0, 0};
185 #include <asm/irq.h>
186 #elif defined(CONFIG_ARCH_IXDP2X01)
187 #include <asm/irq.h>
188 static unsigned int netcard_portlist[] __initdata = {IXDP2X01_CS8900_VIRT_BASE, 0};
189 static unsigned int cs8900_irq_map[] = {IRQ_IXDP2X01_CS8900, 0, 0, 0};
190 #elif defined(CONFIG_ARCH_PNX010X)
191 #include <asm/irq.h>
192 #include <asm/arch/gpio.h>
193 #define CIRRUS_DEFAULT_BASE IO_ADDRESS(EXT_STATIC2_s0_BASE + 0x200000) /* = Physical address 0x48200000 */
194 #define CIRRUS_DEFAULT_IRQ VH_INTC_INT_NUM_CASCADED_INTERRUPT_1 /* Event inputs bank 1 - ID 35/bit 3 */
195 static unsigned int netcard_portlist[] __initdata = {CIRRUS_DEFAULT_BASE, 0};
196 static unsigned int cs8900_irq_map[] = {CIRRUS_DEFAULT_IRQ, 0, 0, 0};
197 #else
198 static unsigned int netcard_portlist[] __initdata =
199 { 0x300, 0x320, 0x340, 0x360, 0x200, 0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x2e0, 0};
200 static unsigned int cs8900_irq_map[] = {10,11,12,5};
201 #endif
202
203 #if DEBUGGING
204 static unsigned int net_debug = DEBUGGING;
205 #else
206 #define net_debug 0 /* gcc will remove all the debug code for us */
207 #endif
208
209 /* The number of low I/O ports used by the ethercard. */
210 #define NETCARD_IO_EXTENT 16
211
212 /* we allow the user to override various values normally set in the EEPROM */
213 #define FORCE_RJ45 0x0001 /* pick one of these three */
214 #define FORCE_AUI 0x0002
215 #define FORCE_BNC 0x0004
216
217 #define FORCE_AUTO 0x0010 /* pick one of these three */
218 #define FORCE_HALF 0x0020
219 #define FORCE_FULL 0x0030
220
221 /* Information that need to be kept for each board. */
222 struct net_local {
223 struct net_device_stats stats;
224 int chip_type; /* one of: CS8900, CS8920, CS8920M */
225 char chip_revision; /* revision letter of the chip ('A'...) */
226 int send_cmd; /* the proper send command: TX_NOW, TX_AFTER_381, or TX_AFTER_ALL */
227 int auto_neg_cnf; /* auto-negotiation word from EEPROM */
228 int adapter_cnf; /* adapter configuration from EEPROM */
229 int isa_config; /* ISA configuration from EEPROM */
230 int irq_map; /* IRQ map from EEPROM */
231 int rx_mode; /* what mode are we in? 0, RX_MULTCAST_ACCEPT, or RX_ALL_ACCEPT */
232 int curr_rx_cfg; /* a copy of PP_RxCFG */
233 int linectl; /* either 0 or LOW_RX_SQUELCH, depending on configuration. */
234 int send_underrun; /* keep track of how many underruns in a row we get */
235 int force; /* force various values; see FORCE* above. */
236 spinlock_t lock;
237 #if ALLOW_DMA
238 int use_dma; /* Flag: we're using dma */
239 int dma; /* DMA channel */
240 int dmasize; /* 16 or 64 */
241 unsigned char *dma_buff; /* points to the beginning of the buffer */
242 unsigned char *end_dma_buff; /* points to the end of the buffer */
243 unsigned char *rx_dma_ptr; /* points to the next packet */
244 #endif
245 };
246
247 /* Index to functions, as function prototypes. */
248
249 static int cs89x0_probe1(struct net_device *dev, int ioaddr, int modular);
250 static int net_open(struct net_device *dev);
251 static int net_send_packet(struct sk_buff *skb, struct net_device *dev);
252 static irqreturn_t net_interrupt(int irq, void *dev_id);
253 static void set_multicast_list(struct net_device *dev);
254 static void net_timeout(struct net_device *dev);
255 static void net_rx(struct net_device *dev);
256 static int net_close(struct net_device *dev);
257 static struct net_device_stats *net_get_stats(struct net_device *dev);
258 static void reset_chip(struct net_device *dev);
259 static int get_eeprom_data(struct net_device *dev, int off, int len, int *buffer);
260 static int get_eeprom_cksum(int off, int len, int *buffer);
261 static int set_mac_address(struct net_device *dev, void *addr);
262 static void count_rx_errors(int status, struct net_local *lp);
263 #ifdef CONFIG_NET_POLL_CONTROLLER
264 static void net_poll_controller(struct net_device *dev);
265 #endif
266 #if ALLOW_DMA
267 static void get_dma_channel(struct net_device *dev);
268 static void release_dma_buff(struct net_local *lp);
269 #endif
270
271 /* Example routines you must write ;->. */
272 #define tx_done(dev) 1
273
274 /*
275 * Permit 'cs89x0_dma=N' in the kernel boot environment
276 */
277 #if !defined(MODULE) && (ALLOW_DMA != 0)
278 static int g_cs89x0_dma;
279
280 static int __init dma_fn(char *str)
281 {
282 g_cs89x0_dma = simple_strtol(str,NULL,0);
283 return 1;
284 }
285
286 __setup("cs89x0_dma=", dma_fn);
287 #endif /* !defined(MODULE) && (ALLOW_DMA != 0) */
288
289 #ifndef MODULE
290 static int g_cs89x0_media__force;
291
292 static int __init media_fn(char *str)
293 {
294 if (!strcmp(str, "rj45")) g_cs89x0_media__force = FORCE_RJ45;
295 else if (!strcmp(str, "aui")) g_cs89x0_media__force = FORCE_AUI;
296 else if (!strcmp(str, "bnc")) g_cs89x0_media__force = FORCE_BNC;
297 return 1;
298 }
299
300 __setup("cs89x0_media=", media_fn);
301
302
303 /* Check for a network adaptor of this type, and return '0' iff one exists.
304 If dev->base_addr == 0, probe all likely locations.
305 If dev->base_addr == 1, always return failure.
306 If dev->base_addr == 2, allocate space for the device and return success
307 (detachable devices only).
308 Return 0 on success.
309 */
310
311 struct net_device * __init cs89x0_probe(int unit)
312 {
313 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
314 unsigned *port;
315 int err = 0;
316 int irq;
317 int io;
318
319 if (!dev)
320 return ERR_PTR(-ENODEV);
321
322 sprintf(dev->name, "eth%d", unit);
323 netdev_boot_setup_check(dev);
324 io = dev->base_addr;
325 irq = dev->irq;
326
327 if (net_debug)
328 printk("cs89x0:cs89x0_probe(0x%x)\n", io);
329
330 if (io > 0x1ff) { /* Check a single specified location. */
331 err = cs89x0_probe1(dev, io, 0);
332 } else if (io != 0) { /* Don't probe at all. */
333 err = -ENXIO;
334 } else {
335 for (port = netcard_portlist; *port; port++) {
336 if (cs89x0_probe1(dev, *port, 0) == 0)
337 break;
338 dev->irq = irq;
339 }
340 if (!*port)
341 err = -ENODEV;
342 }
343 if (err)
344 goto out;
345 return dev;
346 out:
347 free_netdev(dev);
348 printk(KERN_WARNING "cs89x0: no cs8900 or cs8920 detected. Be sure to disable PnP with SETUP\n");
349 return ERR_PTR(err);
350 }
351 #endif
352
353 #if defined(CONFIG_MACH_IXDP2351)
354 static u16
355 readword(unsigned long base_addr, int portno)
356 {
357 return __raw_readw(base_addr + (portno << 1));
358 }
359
360 static void
361 writeword(unsigned long base_addr, int portno, u16 value)
362 {
363 __raw_writew(value, base_addr + (portno << 1));
364 }
365 #elif defined(CONFIG_ARCH_IXDP2X01)
366 static u16
367 readword(unsigned long base_addr, int portno)
368 {
369 return __raw_readl(base_addr + (portno << 1));
370 }
371
372 static void
373 writeword(unsigned long base_addr, int portno, u16 value)
374 {
375 __raw_writel(value, base_addr + (portno << 1));
376 }
377 #elif defined(CONFIG_ARCH_PNX010X)
378 static u16
379 readword(unsigned long base_addr, int portno)
380 {
381 return inw(base_addr + (portno << 1));
382 }
383
384 static void
385 writeword(unsigned long base_addr, int portno, u16 value)
386 {
387 outw(value, base_addr + (portno << 1));
388 }
389 #else
390 static u16
391 readword(unsigned long base_addr, int portno)
392 {
393 return inw(base_addr + portno);
394 }
395
396 static void
397 writeword(unsigned long base_addr, int portno, u16 value)
398 {
399 outw(value, base_addr + portno);
400 }
401 #endif
402
403 static void
404 readwords(unsigned long base_addr, int portno, void *buf, int length)
405 {
406 u8 *buf8 = (u8 *)buf;
407
408 do {
409 u16 tmp16;
410
411 tmp16 = readword(base_addr, portno);
412 *buf8++ = (u8)tmp16;
413 *buf8++ = (u8)(tmp16 >> 8);
414 } while (--length);
415 }
416
417 static void
418 writewords(unsigned long base_addr, int portno, void *buf, int length)
419 {
420 u8 *buf8 = (u8 *)buf;
421
422 do {
423 u16 tmp16;
424
425 tmp16 = *buf8++;
426 tmp16 |= (*buf8++) << 8;
427 writeword(base_addr, portno, tmp16);
428 } while (--length);
429 }
430
431 static u16
432 readreg(struct net_device *dev, u16 regno)
433 {
434 writeword(dev->base_addr, ADD_PORT, regno);
435 return readword(dev->base_addr, DATA_PORT);
436 }
437
438 static void
439 writereg(struct net_device *dev, u16 regno, u16 value)
440 {
441 writeword(dev->base_addr, ADD_PORT, regno);
442 writeword(dev->base_addr, DATA_PORT, value);
443 }
444
445 static int __init
446 wait_eeprom_ready(struct net_device *dev)
447 {
448 int timeout = jiffies;
449 /* check to see if the EEPROM is ready, a timeout is used -
450 just in case EEPROM is ready when SI_BUSY in the
451 PP_SelfST is clear */
452 while(readreg(dev, PP_SelfST) & SI_BUSY)
453 if (jiffies - timeout >= 40)
454 return -1;
455 return 0;
456 }
457
458 static int __init
459 get_eeprom_data(struct net_device *dev, int off, int len, int *buffer)
460 {
461 int i;
462
463 if (net_debug > 3) printk("EEPROM data from %x for %x:\n",off,len);
464 for (i = 0; i < len; i++) {
465 if (wait_eeprom_ready(dev) < 0) return -1;
466 /* Now send the EEPROM read command and EEPROM location to read */
467 writereg(dev, PP_EECMD, (off + i) | EEPROM_READ_CMD);
468 if (wait_eeprom_ready(dev) < 0) return -1;
469 buffer[i] = readreg(dev, PP_EEData);
470 if (net_debug > 3) printk("%04x ", buffer[i]);
471 }
472 if (net_debug > 3) printk("\n");
473 return 0;
474 }
475
476 static int __init
477 get_eeprom_cksum(int off, int len, int *buffer)
478 {
479 int i, cksum;
480
481 cksum = 0;
482 for (i = 0; i < len; i++)
483 cksum += buffer[i];
484 cksum &= 0xffff;
485 if (cksum == 0)
486 return 0;
487 return -1;
488 }
489
490 #ifdef CONFIG_NET_POLL_CONTROLLER
491 /*
492 * Polling receive - used by netconsole and other diagnostic tools
493 * to allow network i/o with interrupts disabled.
494 */
495 static void net_poll_controller(struct net_device *dev)
496 {
497 disable_irq(dev->irq);
498 net_interrupt(dev->irq, dev);
499 enable_irq(dev->irq);
500 }
501 #endif
502
503 /* This is the real probe routine. Linux has a history of friendly device
504 probes on the ISA bus. A good device probes avoids doing writes, and
505 verifies that the correct device exists and functions.
506 Return 0 on success.
507 */
508
509 static int __init
510 cs89x0_probe1(struct net_device *dev, int ioaddr, int modular)
511 {
512 struct net_local *lp = netdev_priv(dev);
513 static unsigned version_printed;
514 int i;
515 int tmp;
516 unsigned rev_type = 0;
517 int eeprom_buff[CHKSUM_LEN];
518 int retval;
519
520 SET_MODULE_OWNER(dev);
521 /* Initialize the device structure. */
522 if (!modular) {
523 memset(lp, 0, sizeof(*lp));
524 spin_lock_init(&lp->lock);
525 #ifndef MODULE
526 #if ALLOW_DMA
527 if (g_cs89x0_dma) {
528 lp->use_dma = 1;
529 lp->dma = g_cs89x0_dma;
530 lp->dmasize = 16; /* Could make this an option... */
531 }
532 #endif
533 lp->force = g_cs89x0_media__force;
534 #endif
535 }
536
537 #ifdef CONFIG_ARCH_PNX010X
538 initialize_ebi();
539
540 /* Map GPIO registers for the pins connected to the CS8900a. */
541 if (map_cirrus_gpio() < 0)
542 return -ENODEV;
543
544 reset_cirrus();
545
546 /* Map event-router registers. */
547 if (map_event_router() < 0)
548 return -ENODEV;
549
550 enable_cirrus_irq();
551
552 unmap_cirrus_gpio();
553 unmap_event_router();
554
555 dev->base_addr = ioaddr;
556
557 for (i = 0 ; i < 3 ; i++)
558 readreg(dev, 0);
559 #endif
560
561 /* Grab the region so we can find another board if autoIRQ fails. */
562 /* WTF is going on here? */
563 if (!request_region(ioaddr & ~3, NETCARD_IO_EXTENT, DRV_NAME)) {
564 printk(KERN_ERR "%s: request_region(0x%x, 0x%x) failed\n",
565 DRV_NAME, ioaddr, NETCARD_IO_EXTENT);
566 retval = -EBUSY;
567 goto out1;
568 }
569
570 #ifdef CONFIG_SH_HICOSH4
571 /* truely reset the chip */
572 writeword(ioaddr, ADD_PORT, 0x0114);
573 writeword(ioaddr, DATA_PORT, 0x0040);
574 #endif
575
576 /* if they give us an odd I/O address, then do ONE write to
577 the address port, to get it back to address zero, where we
578 expect to find the EISA signature word. An IO with a base of 0x3
579 will skip the test for the ADD_PORT. */
580 if (ioaddr & 1) {
581 if (net_debug > 1)
582 printk(KERN_INFO "%s: odd ioaddr 0x%x\n", dev->name, ioaddr);
583 if ((ioaddr & 2) != 2)
584 if ((readword(ioaddr & ~3, ADD_PORT) & ADD_MASK) != ADD_SIG) {
585 printk(KERN_ERR "%s: bad signature 0x%x\n",
586 dev->name, readword(ioaddr & ~3, ADD_PORT));
587 retval = -ENODEV;
588 goto out2;
589 }
590 }
591
592 ioaddr &= ~3;
593 printk(KERN_DEBUG "PP_addr at %x[%x]: 0x%x\n",
594 ioaddr, ADD_PORT, readword(ioaddr, ADD_PORT));
595 writeword(ioaddr, ADD_PORT, PP_ChipID);
596
597 tmp = readword(ioaddr, DATA_PORT);
598 if (tmp != CHIP_EISA_ID_SIG) {
599 printk(KERN_DEBUG "%s: incorrect signature at %x[%x]: 0x%x!="
600 CHIP_EISA_ID_SIG_STR "\n",
601 dev->name, ioaddr, DATA_PORT, tmp);
602 retval = -ENODEV;
603 goto out2;
604 }
605
606 /* Fill in the 'dev' fields. */
607 dev->base_addr = ioaddr;
608
609 /* get the chip type */
610 rev_type = readreg(dev, PRODUCT_ID_ADD);
611 lp->chip_type = rev_type &~ REVISON_BITS;
612 lp->chip_revision = ((rev_type & REVISON_BITS) >> 8) + 'A';
613
614 /* Check the chip type and revision in order to set the correct send command
615 CS8920 revision C and CS8900 revision F can use the faster send. */
616 lp->send_cmd = TX_AFTER_381;
617 if (lp->chip_type == CS8900 && lp->chip_revision >= 'F')
618 lp->send_cmd = TX_NOW;
619 if (lp->chip_type != CS8900 && lp->chip_revision >= 'C')
620 lp->send_cmd = TX_NOW;
621
622 if (net_debug && version_printed++ == 0)
623 printk(version);
624
625 printk(KERN_INFO "%s: cs89%c0%s rev %c found at %#3lx ",
626 dev->name,
627 lp->chip_type==CS8900?'0':'2',
628 lp->chip_type==CS8920M?"M":"",
629 lp->chip_revision,
630 dev->base_addr);
631
632 reset_chip(dev);
633
634 /* Here we read the current configuration of the chip. If there
635 is no Extended EEPROM then the idea is to not disturb the chip
636 configuration, it should have been correctly setup by automatic
637 EEPROM read on reset. So, if the chip says it read the EEPROM
638 the driver will always do *something* instead of complain that
639 adapter_cnf is 0. */
640
641 #ifdef CONFIG_SH_HICOSH4
642 if (1) {
643 /* For the HiCO.SH4 board, things are different: we don't
644 have EEPROM, but there is some data in flash, so we go
645 get it there directly (MAC). */
646 __u16 *confd;
647 short cnt;
648 if (((* (volatile __u32 *) 0xa0013ff0) & 0x00ffffff)
649 == 0x006c3000) {
650 confd = (__u16*) 0xa0013fc0;
651 } else {
652 confd = (__u16*) 0xa001ffc0;
653 }
654 cnt = (*confd++ & 0x00ff) >> 1;
655 while (--cnt > 0) {
656 __u16 j = *confd++;
657
658 switch (j & 0x0fff) {
659 case PP_IA:
660 for (i = 0; i < ETH_ALEN/2; i++) {
661 dev->dev_addr[i*2] = confd[i] & 0xFF;
662 dev->dev_addr[i*2+1] = confd[i] >> 8;
663 }
664 break;
665 }
666 j = (j >> 12) + 1;
667 confd += j;
668 cnt -= j;
669 }
670 } else
671 #endif
672
673 if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) ==
674 (EEPROM_OK|EEPROM_PRESENT)) {
675 /* Load the MAC. */
676 for (i=0; i < ETH_ALEN/2; i++) {
677 unsigned int Addr;
678 Addr = readreg(dev, PP_IA+i*2);
679 dev->dev_addr[i*2] = Addr & 0xFF;
680 dev->dev_addr[i*2+1] = Addr >> 8;
681 }
682
683 /* Load the Adapter Configuration.
684 Note: Barring any more specific information from some
685 other source (ie EEPROM+Schematics), we would not know
686 how to operate a 10Base2 interface on the AUI port.
687 However, since we do read the status of HCB1 and use
688 settings that always result in calls to control_dc_dc(dev,0)
689 a BNC interface should work if the enable pin
690 (dc/dc converter) is on HCB1. It will be called AUI
691 however. */
692
693 lp->adapter_cnf = 0;
694 i = readreg(dev, PP_LineCTL);
695 /* Preserve the setting of the HCB1 pin. */
696 if ((i & (HCB1 | HCB1_ENBL)) == (HCB1 | HCB1_ENBL))
697 lp->adapter_cnf |= A_CNF_DC_DC_POLARITY;
698 /* Save the sqelch bit */
699 if ((i & LOW_RX_SQUELCH) == LOW_RX_SQUELCH)
700 lp->adapter_cnf |= A_CNF_EXTND_10B_2 | A_CNF_LOW_RX_SQUELCH;
701 /* Check if the card is in 10Base-t only mode */
702 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == 0)
703 lp->adapter_cnf |= A_CNF_10B_T | A_CNF_MEDIA_10B_T;
704 /* Check if the card is in AUI only mode */
705 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUI_ONLY)
706 lp->adapter_cnf |= A_CNF_AUI | A_CNF_MEDIA_AUI;
707 /* Check if the card is in Auto mode. */
708 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUTO_AUI_10BASET)
709 lp->adapter_cnf |= A_CNF_AUI | A_CNF_10B_T |
710 A_CNF_MEDIA_AUI | A_CNF_MEDIA_10B_T | A_CNF_MEDIA_AUTO;
711
712 if (net_debug > 1)
713 printk(KERN_INFO "%s: PP_LineCTL=0x%x, adapter_cnf=0x%x\n",
714 dev->name, i, lp->adapter_cnf);
715
716 /* IRQ. Other chips already probe, see below. */
717 if (lp->chip_type == CS8900)
718 lp->isa_config = readreg(dev, PP_CS8900_ISAINT) & INT_NO_MASK;
719
720 printk( "[Cirrus EEPROM] ");
721 }
722
723 printk("\n");
724
725 /* First check to see if an EEPROM is attached. */
726 #ifdef CONFIG_SH_HICOSH4 /* no EEPROM on HiCO, don't hazzle with it here */
727 if (1) {
728 printk(KERN_NOTICE "cs89x0: No EEPROM on HiCO.SH4\n");
729 } else
730 #endif
731 if ((readreg(dev, PP_SelfST) & EEPROM_PRESENT) == 0)
732 printk(KERN_WARNING "cs89x0: No EEPROM, relying on command line....\n");
733 else if (get_eeprom_data(dev, START_EEPROM_DATA,CHKSUM_LEN,eeprom_buff) < 0) {
734 printk(KERN_WARNING "\ncs89x0: EEPROM read failed, relying on command line.\n");
735 } else if (get_eeprom_cksum(START_EEPROM_DATA,CHKSUM_LEN,eeprom_buff) < 0) {
736 /* Check if the chip was able to read its own configuration starting
737 at 0 in the EEPROM*/
738 if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) !=
739 (EEPROM_OK|EEPROM_PRESENT))
740 printk(KERN_WARNING "cs89x0: Extended EEPROM checksum bad and no Cirrus EEPROM, relying on command line\n");
741
742 } else {
743 /* This reads an extended EEPROM that is not documented
744 in the CS8900 datasheet. */
745
746 /* get transmission control word but keep the autonegotiation bits */
747 if (!lp->auto_neg_cnf) lp->auto_neg_cnf = eeprom_buff[AUTO_NEG_CNF_OFFSET/2];
748 /* Store adapter configuration */
749 if (!lp->adapter_cnf) lp->adapter_cnf = eeprom_buff[ADAPTER_CNF_OFFSET/2];
750 /* Store ISA configuration */
751 lp->isa_config = eeprom_buff[ISA_CNF_OFFSET/2];
752 dev->mem_start = eeprom_buff[PACKET_PAGE_OFFSET/2] << 8;
753
754 /* eeprom_buff has 32-bit ints, so we can't just memcpy it */
755 /* store the initial memory base address */
756 for (i = 0; i < ETH_ALEN/2; i++) {
757 dev->dev_addr[i*2] = eeprom_buff[i];
758 dev->dev_addr[i*2+1] = eeprom_buff[i] >> 8;
759 }
760 if (net_debug > 1)
761 printk(KERN_DEBUG "%s: new adapter_cnf: 0x%x\n",
762 dev->name, lp->adapter_cnf);
763 }
764
765 /* allow them to force multiple transceivers. If they force multiple, autosense */
766 {
767 int count = 0;
768 if (lp->force & FORCE_RJ45) {lp->adapter_cnf |= A_CNF_10B_T; count++; }
769 if (lp->force & FORCE_AUI) {lp->adapter_cnf |= A_CNF_AUI; count++; }
770 if (lp->force & FORCE_BNC) {lp->adapter_cnf |= A_CNF_10B_2; count++; }
771 if (count > 1) {lp->adapter_cnf |= A_CNF_MEDIA_AUTO; }
772 else if (lp->force & FORCE_RJ45){lp->adapter_cnf |= A_CNF_MEDIA_10B_T; }
773 else if (lp->force & FORCE_AUI) {lp->adapter_cnf |= A_CNF_MEDIA_AUI; }
774 else if (lp->force & FORCE_BNC) {lp->adapter_cnf |= A_CNF_MEDIA_10B_2; }
775 }
776
777 if (net_debug > 1)
778 printk(KERN_DEBUG "%s: after force 0x%x, adapter_cnf=0x%x\n",
779 dev->name, lp->force, lp->adapter_cnf);
780
781 /* FIXME: We don't let you set dc-dc polarity or low RX squelch from the command line: add it here */
782
783 /* FIXME: We don't let you set the IMM bit from the command line: add it to lp->auto_neg_cnf here */
784
785 /* FIXME: we don't set the Ethernet address on the command line. Use
786 ifconfig IFACE hw ether AABBCCDDEEFF */
787
788 printk(KERN_INFO "cs89x0 media %s%s%s",
789 (lp->adapter_cnf & A_CNF_10B_T)?"RJ-45,":"",
790 (lp->adapter_cnf & A_CNF_AUI)?"AUI,":"",
791 (lp->adapter_cnf & A_CNF_10B_2)?"BNC,":"");
792
793 lp->irq_map = 0xffff;
794
795 /* If this is a CS8900 then no pnp soft */
796 if (lp->chip_type != CS8900 &&
797 /* Check if the ISA IRQ has been set */
798 (i = readreg(dev, PP_CS8920_ISAINT) & 0xff,
799 (i != 0 && i < CS8920_NO_INTS))) {
800 if (!dev->irq)
801 dev->irq = i;
802 } else {
803 i = lp->isa_config & INT_NO_MASK;
804 if (lp->chip_type == CS8900) {
805 #if defined(CONFIG_MACH_IXDP2351) || defined(CONFIG_ARCH_IXDP2X01) || defined(CONFIG_ARCH_PNX010X)
806 i = cs8900_irq_map[0];
807 #else
808 /* Translate the IRQ using the IRQ mapping table. */
809 if (i >= sizeof(cs8900_irq_map)/sizeof(cs8900_irq_map[0]))
810 printk("\ncs89x0: invalid ISA interrupt number %d\n", i);
811 else
812 i = cs8900_irq_map[i];
813
814 lp->irq_map = CS8900_IRQ_MAP; /* fixed IRQ map for CS8900 */
815 } else {
816 int irq_map_buff[IRQ_MAP_LEN/2];
817
818 if (get_eeprom_data(dev, IRQ_MAP_EEPROM_DATA,
819 IRQ_MAP_LEN/2,
820 irq_map_buff) >= 0) {
821 if ((irq_map_buff[0] & 0xff) == PNP_IRQ_FRMT)
822 lp->irq_map = (irq_map_buff[0]>>8) | (irq_map_buff[1] << 8);
823 }
824 #endif
825 }
826 if (!dev->irq)
827 dev->irq = i;
828 }
829
830 printk(" IRQ %d", dev->irq);
831
832 #if ALLOW_DMA
833 if (lp->use_dma) {
834 get_dma_channel(dev);
835 printk(", DMA %d", dev->dma);
836 }
837 else
838 #endif
839 {
840 printk(", programmed I/O");
841 }
842
843 /* print the ethernet address. */
844 printk(", MAC");
845 for (i = 0; i < ETH_ALEN; i++)
846 {
847 printk("%c%02x", i ? ':' : ' ', dev->dev_addr[i]);
848 }
849
850 dev->open = net_open;
851 dev->stop = net_close;
852 dev->tx_timeout = net_timeout;
853 dev->watchdog_timeo = HZ;
854 dev->hard_start_xmit = net_send_packet;
855 dev->get_stats = net_get_stats;
856 dev->set_multicast_list = set_multicast_list;
857 dev->set_mac_address = set_mac_address;
858 #ifdef CONFIG_NET_POLL_CONTROLLER
859 dev->poll_controller = net_poll_controller;
860 #endif
861
862 printk("\n");
863 if (net_debug)
864 printk("cs89x0_probe1() successful\n");
865
866 retval = register_netdev(dev);
867 if (retval)
868 goto out3;
869 return 0;
870 out3:
871 writeword(dev->base_addr, ADD_PORT, PP_ChipID);
872 out2:
873 release_region(ioaddr & ~3, NETCARD_IO_EXTENT);
874 out1:
875 return retval;
876 }
877
878
879 /*********************************
880 * This page contains DMA routines
881 **********************************/
882
883 #if ALLOW_DMA
884
885 #define dma_page_eq(ptr1, ptr2) ((long)(ptr1)>>17 == (long)(ptr2)>>17)
886
887 static void
888 get_dma_channel(struct net_device *dev)
889 {
890 struct net_local *lp = netdev_priv(dev);
891
892 if (lp->dma) {
893 dev->dma = lp->dma;
894 lp->isa_config |= ISA_RxDMA;
895 } else {
896 if ((lp->isa_config & ANY_ISA_DMA) == 0)
897 return;
898 dev->dma = lp->isa_config & DMA_NO_MASK;
899 if (lp->chip_type == CS8900)
900 dev->dma += 5;
901 if (dev->dma < 5 || dev->dma > 7) {
902 lp->isa_config &= ~ANY_ISA_DMA;
903 return;
904 }
905 }
906 return;
907 }
908
909 static void
910 write_dma(struct net_device *dev, int chip_type, int dma)
911 {
912 struct net_local *lp = netdev_priv(dev);
913 if ((lp->isa_config & ANY_ISA_DMA) == 0)
914 return;
915 if (chip_type == CS8900) {
916 writereg(dev, PP_CS8900_ISADMA, dma-5);
917 } else {
918 writereg(dev, PP_CS8920_ISADMA, dma);
919 }
920 }
921
922 static void
923 set_dma_cfg(struct net_device *dev)
924 {
925 struct net_local *lp = netdev_priv(dev);
926
927 if (lp->use_dma) {
928 if ((lp->isa_config & ANY_ISA_DMA) == 0) {
929 if (net_debug > 3)
930 printk("set_dma_cfg(): no DMA\n");
931 return;
932 }
933 if (lp->isa_config & ISA_RxDMA) {
934 lp->curr_rx_cfg |= RX_DMA_ONLY;
935 if (net_debug > 3)
936 printk("set_dma_cfg(): RX_DMA_ONLY\n");
937 } else {
938 lp->curr_rx_cfg |= AUTO_RX_DMA; /* not that we support it... */
939 if (net_debug > 3)
940 printk("set_dma_cfg(): AUTO_RX_DMA\n");
941 }
942 }
943 }
944
945 static int
946 dma_bufcfg(struct net_device *dev)
947 {
948 struct net_local *lp = netdev_priv(dev);
949 if (lp->use_dma)
950 return (lp->isa_config & ANY_ISA_DMA)? RX_DMA_ENBL : 0;
951 else
952 return 0;
953 }
954
955 static int
956 dma_busctl(struct net_device *dev)
957 {
958 int retval = 0;
959 struct net_local *lp = netdev_priv(dev);
960 if (lp->use_dma) {
961 if (lp->isa_config & ANY_ISA_DMA)
962 retval |= RESET_RX_DMA; /* Reset the DMA pointer */
963 if (lp->isa_config & DMA_BURST)
964 retval |= DMA_BURST_MODE; /* Does ISA config specify DMA burst ? */
965 if (lp->dmasize == 64)
966 retval |= RX_DMA_SIZE_64K; /* did they ask for 64K? */
967 retval |= MEMORY_ON; /* we need memory enabled to use DMA. */
968 }
969 return retval;
970 }
971
972 static void
973 dma_rx(struct net_device *dev)
974 {
975 struct net_local *lp = netdev_priv(dev);
976 struct sk_buff *skb;
977 int status, length;
978 unsigned char *bp = lp->rx_dma_ptr;
979
980 status = bp[0] + (bp[1]<<8);
981 length = bp[2] + (bp[3]<<8);
982 bp += 4;
983 if (net_debug > 5) {
984 printk( "%s: receiving DMA packet at %lx, status %x, length %x\n",
985 dev->name, (unsigned long)bp, status, length);
986 }
987 if ((status & RX_OK) == 0) {
988 count_rx_errors(status, lp);
989 goto skip_this_frame;
990 }
991
992 /* Malloc up new buffer. */
993 skb = dev_alloc_skb(length + 2);
994 if (skb == NULL) {
995 if (net_debug) /* I don't think we want to do this to a stressed system */
996 printk("%s: Memory squeeze, dropping packet.\n", dev->name);
997 lp->stats.rx_dropped++;
998
999 /* AKPM: advance bp to the next frame */
1000 skip_this_frame:
1001 bp += (length + 3) & ~3;
1002 if (bp >= lp->end_dma_buff) bp -= lp->dmasize*1024;
1003 lp->rx_dma_ptr = bp;
1004 return;
1005 }
1006 skb_reserve(skb, 2); /* longword align L3 header */
1007
1008 if (bp + length > lp->end_dma_buff) {
1009 int semi_cnt = lp->end_dma_buff - bp;
1010 memcpy(skb_put(skb,semi_cnt), bp, semi_cnt);
1011 memcpy(skb_put(skb,length - semi_cnt), lp->dma_buff,
1012 length - semi_cnt);
1013 } else {
1014 memcpy(skb_put(skb,length), bp, length);
1015 }
1016 bp += (length + 3) & ~3;
1017 if (bp >= lp->end_dma_buff) bp -= lp->dmasize*1024;
1018 lp->rx_dma_ptr = bp;
1019
1020 if (net_debug > 3) {
1021 printk( "%s: received %d byte DMA packet of type %x\n",
1022 dev->name, length,
1023 (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]);
1024 }
1025 skb->protocol=eth_type_trans(skb,dev);
1026 netif_rx(skb);
1027 dev->last_rx = jiffies;
1028 lp->stats.rx_packets++;
1029 lp->stats.rx_bytes += length;
1030 }
1031
1032 #endif /* ALLOW_DMA */
1033
1034 void __init reset_chip(struct net_device *dev)
1035 {
1036 #if !defined(CONFIG_MACH_IXDP2351) && !defined(CONFIG_ARCH_IXDP2X01)
1037 struct net_local *lp = netdev_priv(dev);
1038 int ioaddr = dev->base_addr;
1039 #endif
1040 int reset_start_time;
1041
1042 writereg(dev, PP_SelfCTL, readreg(dev, PP_SelfCTL) | POWER_ON_RESET);
1043
1044 /* wait 30 ms */
1045 msleep(30);
1046
1047 #if !defined(CONFIG_MACH_IXDP2351) && !defined(CONFIG_ARCH_IXDP2X01)
1048 if (lp->chip_type != CS8900) {
1049 /* Hardware problem requires PNP registers to be reconfigured after a reset */
1050 writeword(ioaddr, ADD_PORT, PP_CS8920_ISAINT);
1051 outb(dev->irq, ioaddr + DATA_PORT);
1052 outb(0, ioaddr + DATA_PORT + 1);
1053
1054 writeword(ioaddr, ADD_PORT, PP_CS8920_ISAMemB);
1055 outb((dev->mem_start >> 16) & 0xff, ioaddr + DATA_PORT);
1056 outb((dev->mem_start >> 8) & 0xff, ioaddr + DATA_PORT + 1);
1057 }
1058 #endif /* IXDP2x01 */
1059
1060 /* Wait until the chip is reset */
1061 reset_start_time = jiffies;
1062 while( (readreg(dev, PP_SelfST) & INIT_DONE) == 0 && jiffies - reset_start_time < 2)
1063 ;
1064 }
1065
1066
1067 static void
1068 control_dc_dc(struct net_device *dev, int on_not_off)
1069 {
1070 struct net_local *lp = netdev_priv(dev);
1071 unsigned int selfcontrol;
1072 int timenow = jiffies;
1073 /* control the DC to DC convertor in the SelfControl register.
1074 Note: This is hooked up to a general purpose pin, might not
1075 always be a DC to DC convertor. */
1076
1077 selfcontrol = HCB1_ENBL; /* Enable the HCB1 bit as an output */
1078 if (((lp->adapter_cnf & A_CNF_DC_DC_POLARITY) != 0) ^ on_not_off)
1079 selfcontrol |= HCB1;
1080 else
1081 selfcontrol &= ~HCB1;
1082 writereg(dev, PP_SelfCTL, selfcontrol);
1083
1084 /* Wait for the DC/DC converter to power up - 500ms */
1085 while (jiffies - timenow < HZ)
1086 ;
1087 }
1088
1089 #define DETECTED_NONE 0
1090 #define DETECTED_RJ45H 1
1091 #define DETECTED_RJ45F 2
1092 #define DETECTED_AUI 3
1093 #define DETECTED_BNC 4
1094
1095 static int
1096 detect_tp(struct net_device *dev)
1097 {
1098 struct net_local *lp = netdev_priv(dev);
1099 int timenow = jiffies;
1100 int fdx;
1101
1102 if (net_debug > 1) printk("%s: Attempting TP\n", dev->name);
1103
1104 /* If connected to another full duplex capable 10-Base-T card the link pulses
1105 seem to be lost when the auto detect bit in the LineCTL is set.
1106 To overcome this the auto detect bit will be cleared whilst testing the
1107 10-Base-T interface. This would not be necessary for the sparrow chip but
1108 is simpler to do it anyway. */
1109 writereg(dev, PP_LineCTL, lp->linectl &~ AUI_ONLY);
1110 control_dc_dc(dev, 0);
1111
1112 /* Delay for the hardware to work out if the TP cable is present - 150ms */
1113 for (timenow = jiffies; jiffies - timenow < 15; )
1114 ;
1115 if ((readreg(dev, PP_LineST) & LINK_OK) == 0)
1116 return DETECTED_NONE;
1117
1118 if (lp->chip_type == CS8900) {
1119 switch (lp->force & 0xf0) {
1120 #if 0
1121 case FORCE_AUTO:
1122 printk("%s: cs8900 doesn't autonegotiate\n",dev->name);
1123 return DETECTED_NONE;
1124 #endif
1125 /* CS8900 doesn't support AUTO, change to HALF*/
1126 case FORCE_AUTO:
1127 lp->force &= ~FORCE_AUTO;
1128 lp->force |= FORCE_HALF;
1129 break;
1130 case FORCE_HALF:
1131 break;
1132 case FORCE_FULL:
1133 writereg(dev, PP_TestCTL, readreg(dev, PP_TestCTL) | FDX_8900);
1134 break;
1135 }
1136 fdx = readreg(dev, PP_TestCTL) & FDX_8900;
1137 } else {
1138 switch (lp->force & 0xf0) {
1139 case FORCE_AUTO:
1140 lp->auto_neg_cnf = AUTO_NEG_ENABLE;
1141 break;
1142 case FORCE_HALF:
1143 lp->auto_neg_cnf = 0;
1144 break;
1145 case FORCE_FULL:
1146 lp->auto_neg_cnf = RE_NEG_NOW | ALLOW_FDX;
1147 break;
1148 }
1149
1150 writereg(dev, PP_AutoNegCTL, lp->auto_neg_cnf & AUTO_NEG_MASK);
1151
1152 if ((lp->auto_neg_cnf & AUTO_NEG_BITS) == AUTO_NEG_ENABLE) {
1153 printk(KERN_INFO "%s: negotiating duplex...\n",dev->name);
1154 while (readreg(dev, PP_AutoNegST) & AUTO_NEG_BUSY) {
1155 if (jiffies - timenow > 4000) {
1156 printk(KERN_ERR "**** Full / half duplex auto-negotiation timed out ****\n");
1157 break;
1158 }
1159 }
1160 }
1161 fdx = readreg(dev, PP_AutoNegST) & FDX_ACTIVE;
1162 }
1163 if (fdx)
1164 return DETECTED_RJ45F;
1165 else
1166 return DETECTED_RJ45H;
1167 }
1168
1169 /* send a test packet - return true if carrier bits are ok */
1170 static int
1171 send_test_pkt(struct net_device *dev)
1172 {
1173 char test_packet[] = { 0,0,0,0,0,0, 0,0,0,0,0,0,
1174 0, 46, /* A 46 in network order */
1175 0, 0, /* DSAP=0 & SSAP=0 fields */
1176 0xf3, 0 /* Control (Test Req + P bit set) */ };
1177 long timenow = jiffies;
1178
1179 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_TX_ON);
1180
1181 memcpy(test_packet, dev->dev_addr, ETH_ALEN);
1182 memcpy(test_packet+ETH_ALEN, dev->dev_addr, ETH_ALEN);
1183
1184 writeword(dev->base_addr, TX_CMD_PORT, TX_AFTER_ALL);
1185 writeword(dev->base_addr, TX_LEN_PORT, ETH_ZLEN);
1186
1187 /* Test to see if the chip has allocated memory for the packet */
1188 while (jiffies - timenow < 5)
1189 if (readreg(dev, PP_BusST) & READY_FOR_TX_NOW)
1190 break;
1191 if (jiffies - timenow >= 5)
1192 return 0; /* this shouldn't happen */
1193
1194 /* Write the contents of the packet */
1195 writewords(dev->base_addr, TX_FRAME_PORT,test_packet,(ETH_ZLEN+1) >>1);
1196
1197 if (net_debug > 1) printk("Sending test packet ");
1198 /* wait a couple of jiffies for packet to be received */
1199 for (timenow = jiffies; jiffies - timenow < 3; )
1200 ;
1201 if ((readreg(dev, PP_TxEvent) & TX_SEND_OK_BITS) == TX_OK) {
1202 if (net_debug > 1) printk("succeeded\n");
1203 return 1;
1204 }
1205 if (net_debug > 1) printk("failed\n");
1206 return 0;
1207 }
1208
1209
1210 static int
1211 detect_aui(struct net_device *dev)
1212 {
1213 struct net_local *lp = netdev_priv(dev);
1214
1215 if (net_debug > 1) printk("%s: Attempting AUI\n", dev->name);
1216 control_dc_dc(dev, 0);
1217
1218 writereg(dev, PP_LineCTL, (lp->linectl &~ AUTO_AUI_10BASET) | AUI_ONLY);
1219
1220 if (send_test_pkt(dev))
1221 return DETECTED_AUI;
1222 else
1223 return DETECTED_NONE;
1224 }
1225
1226 static int
1227 detect_bnc(struct net_device *dev)
1228 {
1229 struct net_local *lp = netdev_priv(dev);
1230
1231 if (net_debug > 1) printk("%s: Attempting BNC\n", dev->name);
1232 control_dc_dc(dev, 1);
1233
1234 writereg(dev, PP_LineCTL, (lp->linectl &~ AUTO_AUI_10BASET) | AUI_ONLY);
1235
1236 if (send_test_pkt(dev))
1237 return DETECTED_BNC;
1238 else
1239 return DETECTED_NONE;
1240 }
1241
1242
1243 static void
1244 write_irq(struct net_device *dev, int chip_type, int irq)
1245 {
1246 int i;
1247
1248 if (chip_type == CS8900) {
1249 /* Search the mapping table for the corresponding IRQ pin. */
1250 for (i = 0; i != sizeof(cs8900_irq_map)/sizeof(cs8900_irq_map[0]); i++)
1251 if (cs8900_irq_map[i] == irq)
1252 break;
1253 /* Not found */
1254 if (i == sizeof(cs8900_irq_map)/sizeof(cs8900_irq_map[0]))
1255 i = 3;
1256 writereg(dev, PP_CS8900_ISAINT, i);
1257 } else {
1258 writereg(dev, PP_CS8920_ISAINT, irq);
1259 }
1260 }
1261
1262 /* Open/initialize the board. This is called (in the current kernel)
1263 sometime after booting when the 'ifconfig' program is run.
1264
1265 This routine should set everything up anew at each open, even
1266 registers that "should" only need to be set once at boot, so that
1267 there is non-reboot way to recover if something goes wrong.
1268 */
1269
1270 /* AKPM: do we need to do any locking here? */
1271
1272 static int
1273 net_open(struct net_device *dev)
1274 {
1275 struct net_local *lp = netdev_priv(dev);
1276 int result = 0;
1277 int i;
1278 int ret;
1279
1280 #if !defined(CONFIG_SH_HICOSH4) && !defined(CONFIG_ARCH_PNX010X) /* uses irq#1, so this won't work */
1281 if (dev->irq < 2) {
1282 /* Allow interrupts to be generated by the chip */
1283 /* Cirrus' release had this: */
1284 #if 0
1285 writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ );
1286 #endif
1287 /* And 2.3.47 had this: */
1288 writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
1289
1290 for (i = 2; i < CS8920_NO_INTS; i++) {
1291 if ((1 << i) & lp->irq_map) {
1292 if (request_irq(i, net_interrupt, 0, dev->name, dev) == 0) {
1293 dev->irq = i;
1294 write_irq(dev, lp->chip_type, i);
1295 /* writereg(dev, PP_BufCFG, GENERATE_SW_INTERRUPT); */
1296 break;
1297 }
1298 }
1299 }
1300
1301 if (i >= CS8920_NO_INTS) {
1302 writereg(dev, PP_BusCTL, 0); /* disable interrupts. */
1303 printk(KERN_ERR "cs89x0: can't get an interrupt\n");
1304 ret = -EAGAIN;
1305 goto bad_out;
1306 }
1307 }
1308 else
1309 #endif
1310 {
1311 #if !defined(CONFIG_MACH_IXDP2351) && !defined(CONFIG_ARCH_IXDP2X01) && !defined(CONFIG_ARCH_PNX010X)
1312 if (((1 << dev->irq) & lp->irq_map) == 0) {
1313 printk(KERN_ERR "%s: IRQ %d is not in our map of allowable IRQs, which is %x\n",
1314 dev->name, dev->irq, lp->irq_map);
1315 ret = -EAGAIN;
1316 goto bad_out;
1317 }
1318 #endif
1319 /* FIXME: Cirrus' release had this: */
1320 writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ );
1321 /* And 2.3.47 had this: */
1322 #if 0
1323 writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
1324 #endif
1325 write_irq(dev, lp->chip_type, dev->irq);
1326 ret = request_irq(dev->irq, &net_interrupt, 0, dev->name, dev);
1327 if (ret) {
1328 if (net_debug)
1329 printk(KERN_DEBUG "cs89x0: request_irq(%d) failed\n", dev->irq);
1330 goto bad_out;
1331 }
1332 }
1333
1334 #if ALLOW_DMA
1335 if (lp->use_dma) {
1336 if (lp->isa_config & ANY_ISA_DMA) {
1337 unsigned long flags;
1338 lp->dma_buff = (unsigned char *)__get_dma_pages(GFP_KERNEL,
1339 get_order(lp->dmasize * 1024));
1340
1341 if (!lp->dma_buff) {
1342 printk(KERN_ERR "%s: cannot get %dK memory for DMA\n", dev->name, lp->dmasize);
1343 goto release_irq;
1344 }
1345 if (net_debug > 1) {
1346 printk( "%s: dma %lx %lx\n",
1347 dev->name,
1348 (unsigned long)lp->dma_buff,
1349 (unsigned long)isa_virt_to_bus(lp->dma_buff));
1350 }
1351 if ((unsigned long) lp->dma_buff >= MAX_DMA_ADDRESS ||
1352 !dma_page_eq(lp->dma_buff, lp->dma_buff+lp->dmasize*1024-1)) {
1353 printk(KERN_ERR "%s: not usable as DMA buffer\n", dev->name);
1354 goto release_irq;
1355 }
1356 memset(lp->dma_buff, 0, lp->dmasize * 1024); /* Why? */
1357 if (request_dma(dev->dma, dev->name)) {
1358 printk(KERN_ERR "%s: cannot get dma channel %d\n", dev->name, dev->dma);
1359 goto release_irq;
1360 }
1361 write_dma(dev, lp->chip_type, dev->dma);
1362 lp->rx_dma_ptr = lp->dma_buff;
1363 lp->end_dma_buff = lp->dma_buff + lp->dmasize*1024;
1364 spin_lock_irqsave(&lp->lock, flags);
1365 disable_dma(dev->dma);
1366 clear_dma_ff(dev->dma);
1367 set_dma_mode(dev->dma, 0x14); /* auto_init as well */
1368 set_dma_addr(dev->dma, isa_virt_to_bus(lp->dma_buff));
1369 set_dma_count(dev->dma, lp->dmasize*1024);
1370 enable_dma(dev->dma);
1371 spin_unlock_irqrestore(&lp->lock, flags);
1372 }
1373 }
1374 #endif /* ALLOW_DMA */
1375
1376 /* set the Ethernet address */
1377 for (i=0; i < ETH_ALEN/2; i++)
1378 writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8));
1379
1380 /* while we're testing the interface, leave interrupts disabled */
1381 writereg(dev, PP_BusCTL, MEMORY_ON);
1382
1383 /* Set the LineCTL quintuplet based on adapter configuration read from EEPROM */
1384 if ((lp->adapter_cnf & A_CNF_EXTND_10B_2) && (lp->adapter_cnf & A_CNF_LOW_RX_SQUELCH))
1385 lp->linectl = LOW_RX_SQUELCH;
1386 else
1387 lp->linectl = 0;
1388
1389 /* check to make sure that they have the "right" hardware available */
1390 switch(lp->adapter_cnf & A_CNF_MEDIA_TYPE) {
1391 case A_CNF_MEDIA_10B_T: result = lp->adapter_cnf & A_CNF_10B_T; break;
1392 case A_CNF_MEDIA_AUI: result = lp->adapter_cnf & A_CNF_AUI; break;
1393 case A_CNF_MEDIA_10B_2: result = lp->adapter_cnf & A_CNF_10B_2; break;
1394 default: result = lp->adapter_cnf & (A_CNF_10B_T | A_CNF_AUI | A_CNF_10B_2);
1395 }
1396 #ifdef CONFIG_ARCH_PNX010X
1397 result = A_CNF_10B_T;
1398 #endif
1399 if (!result) {
1400 printk(KERN_ERR "%s: EEPROM is configured for unavailable media\n", dev->name);
1401 release_irq:
1402 #if ALLOW_DMA
1403 release_dma_buff(lp);
1404 #endif
1405 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) & ~(SERIAL_TX_ON | SERIAL_RX_ON));
1406 free_irq(dev->irq, dev);
1407 ret = -EAGAIN;
1408 goto bad_out;
1409 }
1410
1411 /* set the hardware to the configured choice */
1412 switch(lp->adapter_cnf & A_CNF_MEDIA_TYPE) {
1413 case A_CNF_MEDIA_10B_T:
1414 result = detect_tp(dev);
1415 if (result==DETECTED_NONE) {
1416 printk(KERN_WARNING "%s: 10Base-T (RJ-45) has no cable\n", dev->name);
1417 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1418 result = DETECTED_RJ45H; /* Yes! I don't care if I see a link pulse */
1419 }
1420 break;
1421 case A_CNF_MEDIA_AUI:
1422 result = detect_aui(dev);
1423 if (result==DETECTED_NONE) {
1424 printk(KERN_WARNING "%s: 10Base-5 (AUI) has no cable\n", dev->name);
1425 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1426 result = DETECTED_AUI; /* Yes! I don't care if I see a carrrier */
1427 }
1428 break;
1429 case A_CNF_MEDIA_10B_2:
1430 result = detect_bnc(dev);
1431 if (result==DETECTED_NONE) {
1432 printk(KERN_WARNING "%s: 10Base-2 (BNC) has no cable\n", dev->name);
1433 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1434 result = DETECTED_BNC; /* Yes! I don't care if I can xmit a packet */
1435 }
1436 break;
1437 case A_CNF_MEDIA_AUTO:
1438 writereg(dev, PP_LineCTL, lp->linectl | AUTO_AUI_10BASET);
1439 if (lp->adapter_cnf & A_CNF_10B_T)
1440 if ((result = detect_tp(dev)) != DETECTED_NONE)
1441 break;
1442 if (lp->adapter_cnf & A_CNF_AUI)
1443 if ((result = detect_aui(dev)) != DETECTED_NONE)
1444 break;
1445 if (lp->adapter_cnf & A_CNF_10B_2)
1446 if ((result = detect_bnc(dev)) != DETECTED_NONE)
1447 break;
1448 printk(KERN_ERR "%s: no media detected\n", dev->name);
1449 goto release_irq;
1450 }
1451 switch(result) {
1452 case DETECTED_NONE:
1453 printk(KERN_ERR "%s: no network cable attached to configured media\n", dev->name);
1454 goto release_irq;
1455 case DETECTED_RJ45H:
1456 printk(KERN_INFO "%s: using half-duplex 10Base-T (RJ-45)\n", dev->name);
1457 break;
1458 case DETECTED_RJ45F:
1459 printk(KERN_INFO "%s: using full-duplex 10Base-T (RJ-45)\n", dev->name);
1460 break;
1461 case DETECTED_AUI:
1462 printk(KERN_INFO "%s: using 10Base-5 (AUI)\n", dev->name);
1463 break;
1464 case DETECTED_BNC:
1465 printk(KERN_INFO "%s: using 10Base-2 (BNC)\n", dev->name);
1466 break;
1467 }
1468
1469 /* Turn on both receive and transmit operations */
1470 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_RX_ON | SERIAL_TX_ON);
1471
1472 /* Receive only error free packets addressed to this card */
1473 lp->rx_mode = 0;
1474 writereg(dev, PP_RxCTL, DEF_RX_ACCEPT);
1475
1476 lp->curr_rx_cfg = RX_OK_ENBL | RX_CRC_ERROR_ENBL;
1477
1478 if (lp->isa_config & STREAM_TRANSFER)
1479 lp->curr_rx_cfg |= RX_STREAM_ENBL;
1480 #if ALLOW_DMA
1481 set_dma_cfg(dev);
1482 #endif
1483 writereg(dev, PP_RxCFG, lp->curr_rx_cfg);
1484
1485 writereg(dev, PP_TxCFG, TX_LOST_CRS_ENBL | TX_SQE_ERROR_ENBL | TX_OK_ENBL |
1486 TX_LATE_COL_ENBL | TX_JBR_ENBL | TX_ANY_COL_ENBL | TX_16_COL_ENBL);
1487
1488 writereg(dev, PP_BufCFG, READY_FOR_TX_ENBL | RX_MISS_COUNT_OVRFLOW_ENBL |
1489 #if ALLOW_DMA
1490 dma_bufcfg(dev) |
1491 #endif
1492 TX_COL_COUNT_OVRFLOW_ENBL | TX_UNDERRUN_ENBL);
1493
1494 /* now that we've got our act together, enable everything */
1495 writereg(dev, PP_BusCTL, ENABLE_IRQ
1496 | (dev->mem_start?MEMORY_ON : 0) /* turn memory on */
1497 #if ALLOW_DMA
1498 | dma_busctl(dev)
1499 #endif
1500 );
1501 netif_start_queue(dev);
1502 if (net_debug > 1)
1503 printk("cs89x0: net_open() succeeded\n");
1504 return 0;
1505 bad_out:
1506 return ret;
1507 }
1508
1509 static void net_timeout(struct net_device *dev)
1510 {
1511 /* If we get here, some higher level has decided we are broken.
1512 There should really be a "kick me" function call instead. */
1513 if (net_debug > 0) printk("%s: transmit timed out, %s?\n", dev->name,
1514 tx_done(dev) ? "IRQ conflict ?" : "network cable problem");
1515 /* Try to restart the adaptor. */
1516 netif_wake_queue(dev);
1517 }
1518
1519 static int net_send_packet(struct sk_buff *skb, struct net_device *dev)
1520 {
1521 struct net_local *lp = netdev_priv(dev);
1522
1523 if (net_debug > 3) {
1524 printk("%s: sent %d byte packet of type %x\n",
1525 dev->name, skb->len,
1526 (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]);
1527 }
1528
1529 /* keep the upload from being interrupted, since we
1530 ask the chip to start transmitting before the
1531 whole packet has been completely uploaded. */
1532
1533 spin_lock_irq(&lp->lock);
1534 netif_stop_queue(dev);
1535
1536 /* initiate a transmit sequence */
1537 writeword(dev->base_addr, TX_CMD_PORT, lp->send_cmd);
1538 writeword(dev->base_addr, TX_LEN_PORT, skb->len);
1539
1540 /* Test to see if the chip has allocated memory for the packet */
1541 if ((readreg(dev, PP_BusST) & READY_FOR_TX_NOW) == 0) {
1542 /*
1543 * Gasp! It hasn't. But that shouldn't happen since
1544 * we're waiting for TxOk, so return 1 and requeue this packet.
1545 */
1546
1547 spin_unlock_irq(&lp->lock);
1548 if (net_debug) printk("cs89x0: Tx buffer not free!\n");
1549 return 1;
1550 }
1551 /* Write the contents of the packet */
1552 writewords(dev->base_addr, TX_FRAME_PORT,skb->data,(skb->len+1) >>1);
1553 spin_unlock_irq(&lp->lock);
1554 lp->stats.tx_bytes += skb->len;
1555 dev->trans_start = jiffies;
1556 dev_kfree_skb (skb);
1557
1558 /*
1559 * We DO NOT call netif_wake_queue() here.
1560 * We also DO NOT call netif_start_queue().
1561 *
1562 * Either of these would cause another bottom half run through
1563 * net_send_packet() before this packet has fully gone out. That causes
1564 * us to hit the "Gasp!" above and the send is rescheduled. it runs like
1565 * a dog. We just return and wait for the Tx completion interrupt handler
1566 * to restart the netdevice layer
1567 */
1568
1569 return 0;
1570 }
1571
1572 /* The typical workload of the driver:
1573 Handle the network interface interrupts. */
1574
1575 static irqreturn_t net_interrupt(int irq, void *dev_id)
1576 {
1577 struct net_device *dev = dev_id;
1578 struct net_local *lp;
1579 int ioaddr, status;
1580 int handled = 0;
1581
1582 ioaddr = dev->base_addr;
1583 lp = netdev_priv(dev);
1584
1585 /* we MUST read all the events out of the ISQ, otherwise we'll never
1586 get interrupted again. As a consequence, we can't have any limit
1587 on the number of times we loop in the interrupt handler. The
1588 hardware guarantees that eventually we'll run out of events. Of
1589 course, if you're on a slow machine, and packets are arriving
1590 faster than you can read them off, you're screwed. Hasta la
1591 vista, baby! */
1592 while ((status = readword(dev->base_addr, ISQ_PORT))) {
1593 if (net_debug > 4)printk("%s: event=%04x\n", dev->name, status);
1594 handled = 1;
1595 switch(status & ISQ_EVENT_MASK) {
1596 case ISQ_RECEIVER_EVENT:
1597 /* Got a packet(s). */
1598 net_rx(dev);
1599 break;
1600 case ISQ_TRANSMITTER_EVENT:
1601 lp->stats.tx_packets++;
1602 netif_wake_queue(dev); /* Inform upper layers. */
1603 if ((status & ( TX_OK |
1604 TX_LOST_CRS |
1605 TX_SQE_ERROR |
1606 TX_LATE_COL |
1607 TX_16_COL)) != TX_OK) {
1608 if ((status & TX_OK) == 0) lp->stats.tx_errors++;
1609 if (status & TX_LOST_CRS) lp->stats.tx_carrier_errors++;
1610 if (status & TX_SQE_ERROR) lp->stats.tx_heartbeat_errors++;
1611 if (status & TX_LATE_COL) lp->stats.tx_window_errors++;
1612 if (status & TX_16_COL) lp->stats.tx_aborted_errors++;
1613 }
1614 break;
1615 case ISQ_BUFFER_EVENT:
1616 if (status & READY_FOR_TX) {
1617 /* we tried to transmit a packet earlier,
1618 but inexplicably ran out of buffers.
1619 That shouldn't happen since we only ever
1620 load one packet. Shrug. Do the right
1621 thing anyway. */
1622 netif_wake_queue(dev); /* Inform upper layers. */
1623 }
1624 if (status & TX_UNDERRUN) {
1625 if (net_debug > 0) printk("%s: transmit underrun\n", dev->name);
1626 lp->send_underrun++;
1627 if (lp->send_underrun == 3) lp->send_cmd = TX_AFTER_381;
1628 else if (lp->send_underrun == 6) lp->send_cmd = TX_AFTER_ALL;
1629 /* transmit cycle is done, although
1630 frame wasn't transmitted - this
1631 avoids having to wait for the upper
1632 layers to timeout on us, in the
1633 event of a tx underrun */
1634 netif_wake_queue(dev); /* Inform upper layers. */
1635 }
1636 #if ALLOW_DMA
1637 if (lp->use_dma && (status & RX_DMA)) {
1638 int count = readreg(dev, PP_DmaFrameCnt);
1639 while(count) {
1640 if (net_debug > 5)
1641 printk("%s: receiving %d DMA frames\n", dev->name, count);
1642 if (net_debug > 2 && count >1)
1643 printk("%s: receiving %d DMA frames\n", dev->name, count);
1644 dma_rx(dev);
1645 if (--count == 0)
1646 count = readreg(dev, PP_DmaFrameCnt);
1647 if (net_debug > 2 && count > 0)
1648 printk("%s: continuing with %d DMA frames\n", dev->name, count);
1649 }
1650 }
1651 #endif
1652 break;
1653 case ISQ_RX_MISS_EVENT:
1654 lp->stats.rx_missed_errors += (status >>6);
1655 break;
1656 case ISQ_TX_COL_EVENT:
1657 lp->stats.collisions += (status >>6);
1658 break;
1659 }
1660 }
1661 return IRQ_RETVAL(handled);
1662 }
1663
1664 static void
1665 count_rx_errors(int status, struct net_local *lp)
1666 {
1667 lp->stats.rx_errors++;
1668 if (status & RX_RUNT) lp->stats.rx_length_errors++;
1669 if (status & RX_EXTRA_DATA) lp->stats.rx_length_errors++;
1670 if (status & RX_CRC_ERROR) if (!(status & (RX_EXTRA_DATA|RX_RUNT)))
1671 /* per str 172 */
1672 lp->stats.rx_crc_errors++;
1673 if (status & RX_DRIBBLE) lp->stats.rx_frame_errors++;
1674 return;
1675 }
1676
1677 /* We have a good packet(s), get it/them out of the buffers. */
1678 static void
1679 net_rx(struct net_device *dev)
1680 {
1681 struct net_local *lp = netdev_priv(dev);
1682 struct sk_buff *skb;
1683 int status, length;
1684
1685 int ioaddr = dev->base_addr;
1686 status = readword(ioaddr, RX_FRAME_PORT);
1687 length = readword(ioaddr, RX_FRAME_PORT);
1688
1689 if ((status & RX_OK) == 0) {
1690 count_rx_errors(status, lp);
1691 return;
1692 }
1693
1694 /* Malloc up new buffer. */
1695 skb = dev_alloc_skb(length + 2);
1696 if (skb == NULL) {
1697 #if 0 /* Again, this seems a cruel thing to do */
1698 printk(KERN_WARNING "%s: Memory squeeze, dropping packet.\n", dev->name);
1699 #endif
1700 lp->stats.rx_dropped++;
1701 return;
1702 }
1703 skb_reserve(skb, 2); /* longword align L3 header */
1704
1705 readwords(ioaddr, RX_FRAME_PORT, skb_put(skb, length), length >> 1);
1706 if (length & 1)
1707 skb->data[length-1] = readword(ioaddr, RX_FRAME_PORT);
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
1723 static 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(). */
1733 static int
1734 net_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. */
1762 static struct net_device_stats *
1763 net_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
1777 static 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
1805 static 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
1831 static 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
1838 static int io;
1839 static int irq;
1840 static int debug;
1841 static char media[8];
1842 static int duplex=-1;
1843
1844 static int use_dma; /* These generate unused var warnings if ALLOW_DMA = 0 */
1845 static int dma;
1846 static int dmasize=16; /* or 64 */
1847
1848 module_param(io, int, 0);
1849 module_param(irq, int, 0);
1850 module_param(debug, int, 0);
1851 module_param_string(media, media, sizeof(media), 0);
1852 module_param(duplex, int, 0);
1853 module_param(dma , int, 0);
1854 module_param(dmasize , int, 0);
1855 module_param(use_dma , int, 0);
1856 MODULE_PARM_DESC(io, "cs89x0 I/O base address");
1857 MODULE_PARM_DESC(irq, "cs89x0 IRQ number");
1858 #if DEBUGGING
1859 MODULE_PARM_DESC(debug, "cs89x0 debug level (0-6)");
1860 #else
1861 MODULE_PARM_DESC(debug, "(ignored)");
1862 #endif
1863 MODULE_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 */
1865 MODULE_PARM_DESC(duplex, "(ignored)");
1866 #if ALLOW_DMA
1867 MODULE_PARM_DESC(dma , "cs89x0 ISA DMA channel; ignored if use_dma=0");
1868 MODULE_PARM_DESC(dmasize , "cs89x0 DMA size in kB (16,64); ignored if use_dma=0");
1869 MODULE_PARM_DESC(use_dma , "cs89x0 using DMA (0-1)");
1870 #else
1871 MODULE_PARM_DESC(dma , "(ignored)");
1872 MODULE_PARM_DESC(dmasize , "(ignored)");
1873 MODULE_PARM_DESC(use_dma , "(ignored)");
1874 #endif
1875
1876 MODULE_AUTHOR("Mike Cruse, Russwll Nelson <nelson@crynwr.com>, Andrew Morton <andrewm@uow.edu.au>");
1877 MODULE_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
1906 int __init init_module(void)
1907 {
1908 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
1909 struct net_local *lp;
1910 int ret = 0;
1911
1912 #if DEBUGGING
1913 net_debug = debug;
1914 #else
1915 debug = 0;
1916 #endif
1917 if (!dev)
1918 return -ENOMEM;
1919
1920 dev->irq = irq;
1921 dev->base_addr = io;
1922 lp = netdev_priv(dev);
1923
1924 #if ALLOW_DMA
1925 if (use_dma) {
1926 lp->use_dma = use_dma;
1927 lp->dma = dma;
1928 lp->dmasize = dmasize;
1929 }
1930 #endif
1931
1932 spin_lock_init(&lp->lock);
1933
1934 /* boy, they'd better get these right */
1935 if (!strcmp(media, "rj45"))
1936 lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T;
1937 else if (!strcmp(media, "aui"))
1938 lp->adapter_cnf = A_CNF_MEDIA_AUI | A_CNF_AUI;
1939 else if (!strcmp(media, "bnc"))
1940 lp->adapter_cnf = A_CNF_MEDIA_10B_2 | A_CNF_10B_2;
1941 else
1942 lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T;
1943
1944 if (duplex==-1)
1945 lp->auto_neg_cnf = AUTO_NEG_ENABLE;
1946
1947 if (io == 0) {
1948 printk(KERN_ERR "cs89x0.c: Module autoprobing not allowed.\n");
1949 printk(KERN_ERR "cs89x0.c: Append io=0xNNN\n");
1950 ret = -EPERM;
1951 goto out;
1952 } else if (io <= 0x1ff) {
1953 ret = -ENXIO;
1954 goto out;
1955 }
1956
1957 #if ALLOW_DMA
1958 if (use_dma && dmasize != 16 && dmasize != 64) {
1959 printk(KERN_ERR "cs89x0.c: dma size must be either 16K or 64K, not %dK\n", dmasize);
1960 ret = -EPERM;
1961 goto out;
1962 }
1963 #endif
1964 ret = cs89x0_probe1(dev, io, 1);
1965 if (ret)
1966 goto out;
1967
1968 dev_cs89x0 = dev;
1969 return 0;
1970 out:
1971 free_netdev(dev);
1972 return ret;
1973 }
1974
1975 void __exit
1976 cleanup_module(void)
1977 {
1978 unregister_netdev(dev_cs89x0);
1979 writeword(dev_cs89x0->base_addr, ADD_PORT, PP_ChipID);
1980 release_region(dev_cs89x0->base_addr, NETCARD_IO_EXTENT);
1981 free_netdev(dev_cs89x0);
1982 }
1983 #endif /* MODULE */
1984
1985 /*
1986 * Local variables:
1987 * version-control: t
1988 * kept-new-versions: 5
1989 * c-indent-level: 8
1990 * tab-width: 8
1991 * End:
1992 *
1993 */
kmemtrace - Kernel memory tracer