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drivers/net/cs89x0.c: compilation warning fix
[linux-2.6/mini2440.git] / drivers / net / cs89x0.c
blob348371fda597b0f1072e92cf062f11a4a12d7924
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[] __used __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[] __used __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[] __used __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[] __used __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[] __used __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[] __used __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 DECLARE_MAC_BUF(mac);
520
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 >= ARRAY_SIZE(cs8900_irq_map))
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 %s", print_mac(mac, dev->dev_addr));
845
846 dev->open = net_open;
847 dev->stop = net_close;
848 dev->tx_timeout = net_timeout;
849 dev->watchdog_timeo = HZ;
850 dev->hard_start_xmit = net_send_packet;
851 dev->get_stats = net_get_stats;
852 dev->set_multicast_list = set_multicast_list;
853 dev->set_mac_address = set_mac_address;
854 #ifdef CONFIG_NET_POLL_CONTROLLER
855 dev->poll_controller = net_poll_controller;
856 #endif
857
858 printk("\n");
859 if (net_debug)
860 printk("cs89x0_probe1() successful\n");
861
862 retval = register_netdev(dev);
863 if (retval)
864 goto out3;
865 return 0;
866 out3:
867 writeword(dev->base_addr, ADD_PORT, PP_ChipID);
868 out2:
869 release_region(ioaddr & ~3, NETCARD_IO_EXTENT);
870 out1:
871 return retval;
872 }
873
874
875 /*********************************
876 * This page contains DMA routines
877 **********************************/
878
879 #if ALLOW_DMA
880
881 #define dma_page_eq(ptr1, ptr2) ((long)(ptr1)>>17 == (long)(ptr2)>>17)
882
883 static void
884 get_dma_channel(struct net_device *dev)
885 {
886 struct net_local *lp = netdev_priv(dev);
887
888 if (lp->dma) {
889 dev->dma = lp->dma;
890 lp->isa_config |= ISA_RxDMA;
891 } else {
892 if ((lp->isa_config & ANY_ISA_DMA) == 0)
893 return;
894 dev->dma = lp->isa_config & DMA_NO_MASK;
895 if (lp->chip_type == CS8900)
896 dev->dma += 5;
897 if (dev->dma < 5 || dev->dma > 7) {
898 lp->isa_config &= ~ANY_ISA_DMA;
899 return;
900 }
901 }
902 return;
903 }
904
905 static void
906 write_dma(struct net_device *dev, int chip_type, int dma)
907 {
908 struct net_local *lp = netdev_priv(dev);
909 if ((lp->isa_config & ANY_ISA_DMA) == 0)
910 return;
911 if (chip_type == CS8900) {
912 writereg(dev, PP_CS8900_ISADMA, dma-5);
913 } else {
914 writereg(dev, PP_CS8920_ISADMA, dma);
915 }
916 }
917
918 static void
919 set_dma_cfg(struct net_device *dev)
920 {
921 struct net_local *lp = netdev_priv(dev);
922
923 if (lp->use_dma) {
924 if ((lp->isa_config & ANY_ISA_DMA) == 0) {
925 if (net_debug > 3)
926 printk("set_dma_cfg(): no DMA\n");
927 return;
928 }
929 if (lp->isa_config & ISA_RxDMA) {
930 lp->curr_rx_cfg |= RX_DMA_ONLY;
931 if (net_debug > 3)
932 printk("set_dma_cfg(): RX_DMA_ONLY\n");
933 } else {
934 lp->curr_rx_cfg |= AUTO_RX_DMA; /* not that we support it... */
935 if (net_debug > 3)
936 printk("set_dma_cfg(): AUTO_RX_DMA\n");
937 }
938 }
939 }
940
941 static int
942 dma_bufcfg(struct net_device *dev)
943 {
944 struct net_local *lp = netdev_priv(dev);
945 if (lp->use_dma)
946 return (lp->isa_config & ANY_ISA_DMA)? RX_DMA_ENBL : 0;
947 else
948 return 0;
949 }
950
951 static int
952 dma_busctl(struct net_device *dev)
953 {
954 int retval = 0;
955 struct net_local *lp = netdev_priv(dev);
956 if (lp->use_dma) {
957 if (lp->isa_config & ANY_ISA_DMA)
958 retval |= RESET_RX_DMA; /* Reset the DMA pointer */
959 if (lp->isa_config & DMA_BURST)
960 retval |= DMA_BURST_MODE; /* Does ISA config specify DMA burst ? */
961 if (lp->dmasize == 64)
962 retval |= RX_DMA_SIZE_64K; /* did they ask for 64K? */
963 retval |= MEMORY_ON; /* we need memory enabled to use DMA. */
964 }
965 return retval;
966 }
967
968 static void
969 dma_rx(struct net_device *dev)
970 {
971 struct net_local *lp = netdev_priv(dev);
972 struct sk_buff *skb;
973 int status, length;
974 unsigned char *bp = lp->rx_dma_ptr;
975
976 status = bp[0] + (bp[1]<<8);
977 length = bp[2] + (bp[3]<<8);
978 bp += 4;
979 if (net_debug > 5) {
980 printk( "%s: receiving DMA packet at %lx, status %x, length %x\n",
981 dev->name, (unsigned long)bp, status, length);
982 }
983 if ((status & RX_OK) == 0) {
984 count_rx_errors(status, lp);
985 goto skip_this_frame;
986 }
987
988 /* Malloc up new buffer. */
989 skb = dev_alloc_skb(length + 2);
990 if (skb == NULL) {
991 if (net_debug) /* I don't think we want to do this to a stressed system */
992 printk("%s: Memory squeeze, dropping packet.\n", dev->name);
993 lp->stats.rx_dropped++;
994
995 /* AKPM: advance bp to the next frame */
996 skip_this_frame:
997 bp += (length + 3) & ~3;
998 if (bp >= lp->end_dma_buff) bp -= lp->dmasize*1024;
999 lp->rx_dma_ptr = bp;
1000 return;
1001 }
1002 skb_reserve(skb, 2); /* longword align L3 header */
1003
1004 if (bp + length > lp->end_dma_buff) {
1005 int semi_cnt = lp->end_dma_buff - bp;
1006 memcpy(skb_put(skb,semi_cnt), bp, semi_cnt);
1007 memcpy(skb_put(skb,length - semi_cnt), lp->dma_buff,
1008 length - semi_cnt);
1009 } else {
1010 memcpy(skb_put(skb,length), bp, length);
1011 }
1012 bp += (length + 3) & ~3;
1013 if (bp >= lp->end_dma_buff) bp -= lp->dmasize*1024;
1014 lp->rx_dma_ptr = bp;
1015
1016 if (net_debug > 3) {
1017 printk( "%s: received %d byte DMA packet of type %x\n",
1018 dev->name, length,
1019 (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]);
1020 }
1021 skb->protocol=eth_type_trans(skb,dev);
1022 netif_rx(skb);
1023 dev->last_rx = jiffies;
1024 lp->stats.rx_packets++;
1025 lp->stats.rx_bytes += length;
1026 }
1027
1028 #endif /* ALLOW_DMA */
1029
1030 void __init reset_chip(struct net_device *dev)
1031 {
1032 #if !defined(CONFIG_MACH_IXDP2351) && !defined(CONFIG_ARCH_IXDP2X01)
1033 struct net_local *lp = netdev_priv(dev);
1034 int ioaddr = dev->base_addr;
1035 #endif
1036 int reset_start_time;
1037
1038 writereg(dev, PP_SelfCTL, readreg(dev, PP_SelfCTL) | POWER_ON_RESET);
1039
1040 /* wait 30 ms */
1041 msleep(30);
1042
1043 #if !defined(CONFIG_MACH_IXDP2351) && !defined(CONFIG_ARCH_IXDP2X01)
1044 if (lp->chip_type != CS8900) {
1045 /* Hardware problem requires PNP registers to be reconfigured after a reset */
1046 writeword(ioaddr, ADD_PORT, PP_CS8920_ISAINT);
1047 outb(dev->irq, ioaddr + DATA_PORT);
1048 outb(0, ioaddr + DATA_PORT + 1);
1049
1050 writeword(ioaddr, ADD_PORT, PP_CS8920_ISAMemB);
1051 outb((dev->mem_start >> 16) & 0xff, ioaddr + DATA_PORT);
1052 outb((dev->mem_start >> 8) & 0xff, ioaddr + DATA_PORT + 1);
1053 }
1054 #endif /* IXDP2x01 */
1055
1056 /* Wait until the chip is reset */
1057 reset_start_time = jiffies;
1058 while( (readreg(dev, PP_SelfST) & INIT_DONE) == 0 && jiffies - reset_start_time < 2)
1059 ;
1060 }
1061
1062
1063 static void
1064 control_dc_dc(struct net_device *dev, int on_not_off)
1065 {
1066 struct net_local *lp = netdev_priv(dev);
1067 unsigned int selfcontrol;
1068 int timenow = jiffies;
1069 /* control the DC to DC convertor in the SelfControl register.
1070 Note: This is hooked up to a general purpose pin, might not
1071 always be a DC to DC convertor. */
1072
1073 selfcontrol = HCB1_ENBL; /* Enable the HCB1 bit as an output */
1074 if (((lp->adapter_cnf & A_CNF_DC_DC_POLARITY) != 0) ^ on_not_off)
1075 selfcontrol |= HCB1;
1076 else
1077 selfcontrol &= ~HCB1;
1078 writereg(dev, PP_SelfCTL, selfcontrol);
1079
1080 /* Wait for the DC/DC converter to power up - 500ms */
1081 while (jiffies - timenow < HZ)
1082 ;
1083 }
1084
1085 #define DETECTED_NONE 0
1086 #define DETECTED_RJ45H 1
1087 #define DETECTED_RJ45F 2
1088 #define DETECTED_AUI 3
1089 #define DETECTED_BNC 4
1090
1091 static int
1092 detect_tp(struct net_device *dev)
1093 {
1094 struct net_local *lp = netdev_priv(dev);
1095 int timenow = jiffies;
1096 int fdx;
1097
1098 if (net_debug > 1) printk("%s: Attempting TP\n", dev->name);
1099
1100 /* If connected to another full duplex capable 10-Base-T card the link pulses
1101 seem to be lost when the auto detect bit in the LineCTL is set.
1102 To overcome this the auto detect bit will be cleared whilst testing the
1103 10-Base-T interface. This would not be necessary for the sparrow chip but
1104 is simpler to do it anyway. */
1105 writereg(dev, PP_LineCTL, lp->linectl &~ AUI_ONLY);
1106 control_dc_dc(dev, 0);
1107
1108 /* Delay for the hardware to work out if the TP cable is present - 150ms */
1109 for (timenow = jiffies; jiffies - timenow < 15; )
1110 ;
1111 if ((readreg(dev, PP_LineST) & LINK_OK) == 0)
1112 return DETECTED_NONE;
1113
1114 if (lp->chip_type == CS8900) {
1115 switch (lp->force & 0xf0) {
1116 #if 0
1117 case FORCE_AUTO:
1118 printk("%s: cs8900 doesn't autonegotiate\n",dev->name);
1119 return DETECTED_NONE;
1120 #endif
1121 /* CS8900 doesn't support AUTO, change to HALF*/
1122 case FORCE_AUTO:
1123 lp->force &= ~FORCE_AUTO;
1124 lp->force |= FORCE_HALF;
1125 break;
1126 case FORCE_HALF:
1127 break;
1128 case FORCE_FULL:
1129 writereg(dev, PP_TestCTL, readreg(dev, PP_TestCTL) | FDX_8900);
1130 break;
1131 }
1132 fdx = readreg(dev, PP_TestCTL) & FDX_8900;
1133 } else {
1134 switch (lp->force & 0xf0) {
1135 case FORCE_AUTO:
1136 lp->auto_neg_cnf = AUTO_NEG_ENABLE;
1137 break;
1138 case FORCE_HALF:
1139 lp->auto_neg_cnf = 0;
1140 break;
1141 case FORCE_FULL:
1142 lp->auto_neg_cnf = RE_NEG_NOW | ALLOW_FDX;
1143 break;
1144 }
1145
1146 writereg(dev, PP_AutoNegCTL, lp->auto_neg_cnf & AUTO_NEG_MASK);
1147
1148 if ((lp->auto_neg_cnf & AUTO_NEG_BITS) == AUTO_NEG_ENABLE) {
1149 printk(KERN_INFO "%s: negotiating duplex...\n",dev->name);
1150 while (readreg(dev, PP_AutoNegST) & AUTO_NEG_BUSY) {
1151 if (jiffies - timenow > 4000) {
1152 printk(KERN_ERR "**** Full / half duplex auto-negotiation timed out ****\n");
1153 break;
1154 }
1155 }
1156 }
1157 fdx = readreg(dev, PP_AutoNegST) & FDX_ACTIVE;
1158 }
1159 if (fdx)
1160 return DETECTED_RJ45F;
1161 else
1162 return DETECTED_RJ45H;
1163 }
1164
1165 /* send a test packet - return true if carrier bits are ok */
1166 static int
1167 send_test_pkt(struct net_device *dev)
1168 {
1169 char test_packet[] = { 0,0,0,0,0,0, 0,0,0,0,0,0,
1170 0, 46, /* A 46 in network order */
1171 0, 0, /* DSAP=0 & SSAP=0 fields */
1172 0xf3, 0 /* Control (Test Req + P bit set) */ };
1173 long timenow = jiffies;
1174
1175 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_TX_ON);
1176
1177 memcpy(test_packet, dev->dev_addr, ETH_ALEN);
1178 memcpy(test_packet+ETH_ALEN, dev->dev_addr, ETH_ALEN);
1179
1180 writeword(dev->base_addr, TX_CMD_PORT, TX_AFTER_ALL);
1181 writeword(dev->base_addr, TX_LEN_PORT, ETH_ZLEN);
1182
1183 /* Test to see if the chip has allocated memory for the packet */
1184 while (jiffies - timenow < 5)
1185 if (readreg(dev, PP_BusST) & READY_FOR_TX_NOW)
1186 break;
1187 if (jiffies - timenow >= 5)
1188 return 0; /* this shouldn't happen */
1189
1190 /* Write the contents of the packet */
1191 writewords(dev->base_addr, TX_FRAME_PORT,test_packet,(ETH_ZLEN+1) >>1);
1192
1193 if (net_debug > 1) printk("Sending test packet ");
1194 /* wait a couple of jiffies for packet to be received */
1195 for (timenow = jiffies; jiffies - timenow < 3; )
1196 ;
1197 if ((readreg(dev, PP_TxEvent) & TX_SEND_OK_BITS) == TX_OK) {
1198 if (net_debug > 1) printk("succeeded\n");
1199 return 1;
1200 }
1201 if (net_debug > 1) printk("failed\n");
1202 return 0;
1203 }
1204
1205
1206 static int
1207 detect_aui(struct net_device *dev)
1208 {
1209 struct net_local *lp = netdev_priv(dev);
1210
1211 if (net_debug > 1) printk("%s: Attempting AUI\n", dev->name);
1212 control_dc_dc(dev, 0);
1213
1214 writereg(dev, PP_LineCTL, (lp->linectl &~ AUTO_AUI_10BASET) | AUI_ONLY);
1215
1216 if (send_test_pkt(dev))
1217 return DETECTED_AUI;
1218 else
1219 return DETECTED_NONE;
1220 }
1221
1222 static int
1223 detect_bnc(struct net_device *dev)
1224 {
1225 struct net_local *lp = netdev_priv(dev);
1226
1227 if (net_debug > 1) printk("%s: Attempting BNC\n", dev->name);
1228 control_dc_dc(dev, 1);
1229
1230 writereg(dev, PP_LineCTL, (lp->linectl &~ AUTO_AUI_10BASET) | AUI_ONLY);
1231
1232 if (send_test_pkt(dev))
1233 return DETECTED_BNC;
1234 else
1235 return DETECTED_NONE;
1236 }
1237
1238
1239 static void
1240 write_irq(struct net_device *dev, int chip_type, int irq)
1241 {
1242 int i;
1243
1244 if (chip_type == CS8900) {
1245 /* Search the mapping table for the corresponding IRQ pin. */
1246 for (i = 0; i != ARRAY_SIZE(cs8900_irq_map); i++)
1247 if (cs8900_irq_map[i] == irq)
1248 break;
1249 /* Not found */
1250 if (i == ARRAY_SIZE(cs8900_irq_map))
1251 i = 3;
1252 writereg(dev, PP_CS8900_ISAINT, i);
1253 } else {
1254 writereg(dev, PP_CS8920_ISAINT, irq);
1255 }
1256 }
1257
1258 /* Open/initialize the board. This is called (in the current kernel)
1259 sometime after booting when the 'ifconfig' program is run.
1260
1261 This routine should set everything up anew at each open, even
1262 registers that "should" only need to be set once at boot, so that
1263 there is non-reboot way to recover if something goes wrong.
1264 */
1265
1266 /* AKPM: do we need to do any locking here? */
1267
1268 static int
1269 net_open(struct net_device *dev)
1270 {
1271 struct net_local *lp = netdev_priv(dev);
1272 int result = 0;
1273 int i;
1274 int ret;
1275
1276 #if !defined(CONFIG_SH_HICOSH4) && !defined(CONFIG_ARCH_PNX010X) /* uses irq#1, so this won't work */
1277 if (dev->irq < 2) {
1278 /* Allow interrupts to be generated by the chip */
1279 /* Cirrus' release had this: */
1280 #if 0
1281 writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ );
1282 #endif
1283 /* And 2.3.47 had this: */
1284 writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
1285
1286 for (i = 2; i < CS8920_NO_INTS; i++) {
1287 if ((1 << i) & lp->irq_map) {
1288 if (request_irq(i, net_interrupt, 0, dev->name, dev) == 0) {
1289 dev->irq = i;
1290 write_irq(dev, lp->chip_type, i);
1291 /* writereg(dev, PP_BufCFG, GENERATE_SW_INTERRUPT); */
1292 break;
1293 }
1294 }
1295 }
1296
1297 if (i >= CS8920_NO_INTS) {
1298 writereg(dev, PP_BusCTL, 0); /* disable interrupts. */
1299 printk(KERN_ERR "cs89x0: can't get an interrupt\n");
1300 ret = -EAGAIN;
1301 goto bad_out;
1302 }
1303 }
1304 else
1305 #endif
1306 {
1307 #if !defined(CONFIG_MACH_IXDP2351) && !defined(CONFIG_ARCH_IXDP2X01) && !defined(CONFIG_ARCH_PNX010X)
1308 if (((1 << dev->irq) & lp->irq_map) == 0) {
1309 printk(KERN_ERR "%s: IRQ %d is not in our map of allowable IRQs, which is %x\n",
1310 dev->name, dev->irq, lp->irq_map);
1311 ret = -EAGAIN;
1312 goto bad_out;
1313 }
1314 #endif
1315 /* FIXME: Cirrus' release had this: */
1316 writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ );
1317 /* And 2.3.47 had this: */
1318 #if 0
1319 writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
1320 #endif
1321 write_irq(dev, lp->chip_type, dev->irq);
1322 ret = request_irq(dev->irq, &net_interrupt, 0, dev->name, dev);
1323 if (ret) {
1324 if (net_debug)
1325 printk(KERN_DEBUG "cs89x0: request_irq(%d) failed\n", dev->irq);
1326 goto bad_out;
1327 }
1328 }
1329
1330 #if ALLOW_DMA
1331 if (lp->use_dma) {
1332 if (lp->isa_config & ANY_ISA_DMA) {
1333 unsigned long flags;
1334 lp->dma_buff = (unsigned char *)__get_dma_pages(GFP_KERNEL,
1335 get_order(lp->dmasize * 1024));
1336
1337 if (!lp->dma_buff) {
1338 printk(KERN_ERR "%s: cannot get %dK memory for DMA\n", dev->name, lp->dmasize);
1339 goto release_irq;
1340 }
1341 if (net_debug > 1) {
1342 printk( "%s: dma %lx %lx\n",
1343 dev->name,
1344 (unsigned long)lp->dma_buff,
1345 (unsigned long)isa_virt_to_bus(lp->dma_buff));
1346 }
1347 if ((unsigned long) lp->dma_buff >= MAX_DMA_ADDRESS ||
1348 !dma_page_eq(lp->dma_buff, lp->dma_buff+lp->dmasize*1024-1)) {
1349 printk(KERN_ERR "%s: not usable as DMA buffer\n", dev->name);
1350 goto release_irq;
1351 }
1352 memset(lp->dma_buff, 0, lp->dmasize * 1024); /* Why? */
1353 if (request_dma(dev->dma, dev->name)) {
1354 printk(KERN_ERR "%s: cannot get dma channel %d\n", dev->name, dev->dma);
1355 goto release_irq;
1356 }
1357 write_dma(dev, lp->chip_type, dev->dma);
1358 lp->rx_dma_ptr = lp->dma_buff;
1359 lp->end_dma_buff = lp->dma_buff + lp->dmasize*1024;
1360 spin_lock_irqsave(&lp->lock, flags);
1361 disable_dma(dev->dma);
1362 clear_dma_ff(dev->dma);
1363 set_dma_mode(dev->dma, 0x14); /* auto_init as well */
1364 set_dma_addr(dev->dma, isa_virt_to_bus(lp->dma_buff));
1365 set_dma_count(dev->dma, lp->dmasize*1024);
1366 enable_dma(dev->dma);
1367 spin_unlock_irqrestore(&lp->lock, flags);
1368 }
1369 }
1370 #endif /* ALLOW_DMA */
1371
1372 /* set the Ethernet address */
1373 for (i=0; i < ETH_ALEN/2; i++)
1374 writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8));
1375
1376 /* while we're testing the interface, leave interrupts disabled */
1377 writereg(dev, PP_BusCTL, MEMORY_ON);
1378
1379 /* Set the LineCTL quintuplet based on adapter configuration read from EEPROM */
1380 if ((lp->adapter_cnf & A_CNF_EXTND_10B_2) && (lp->adapter_cnf & A_CNF_LOW_RX_SQUELCH))
1381 lp->linectl = LOW_RX_SQUELCH;
1382 else
1383 lp->linectl = 0;
1384
1385 /* check to make sure that they have the "right" hardware available */
1386 switch(lp->adapter_cnf & A_CNF_MEDIA_TYPE) {
1387 case A_CNF_MEDIA_10B_T: result = lp->adapter_cnf & A_CNF_10B_T; break;
1388 case A_CNF_MEDIA_AUI: result = lp->adapter_cnf & A_CNF_AUI; break;
1389 case A_CNF_MEDIA_10B_2: result = lp->adapter_cnf & A_CNF_10B_2; break;
1390 default: result = lp->adapter_cnf & (A_CNF_10B_T | A_CNF_AUI | A_CNF_10B_2);
1391 }
1392 #ifdef CONFIG_ARCH_PNX010X
1393 result = A_CNF_10B_T;
1394 #endif
1395 if (!result) {
1396 printk(KERN_ERR "%s: EEPROM is configured for unavailable media\n", dev->name);
1397 release_irq:
1398 #if ALLOW_DMA
1399 release_dma_buff(lp);
1400 #endif
1401 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) & ~(SERIAL_TX_ON | SERIAL_RX_ON));
1402 free_irq(dev->irq, dev);
1403 ret = -EAGAIN;
1404 goto bad_out;
1405 }
1406
1407 /* set the hardware to the configured choice */
1408 switch(lp->adapter_cnf & A_CNF_MEDIA_TYPE) {
1409 case A_CNF_MEDIA_10B_T:
1410 result = detect_tp(dev);
1411 if (result==DETECTED_NONE) {
1412 printk(KERN_WARNING "%s: 10Base-T (RJ-45) has no cable\n", dev->name);
1413 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1414 result = DETECTED_RJ45H; /* Yes! I don't care if I see a link pulse */
1415 }
1416 break;
1417 case A_CNF_MEDIA_AUI:
1418 result = detect_aui(dev);
1419 if (result==DETECTED_NONE) {
1420 printk(KERN_WARNING "%s: 10Base-5 (AUI) has no cable\n", dev->name);
1421 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1422 result = DETECTED_AUI; /* Yes! I don't care if I see a carrrier */
1423 }
1424 break;
1425 case A_CNF_MEDIA_10B_2:
1426 result = detect_bnc(dev);
1427 if (result==DETECTED_NONE) {
1428 printk(KERN_WARNING "%s: 10Base-2 (BNC) has no cable\n", dev->name);
1429 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1430 result = DETECTED_BNC; /* Yes! I don't care if I can xmit a packet */
1431 }
1432 break;
1433 case A_CNF_MEDIA_AUTO:
1434 writereg(dev, PP_LineCTL, lp->linectl | AUTO_AUI_10BASET);
1435 if (lp->adapter_cnf & A_CNF_10B_T)
1436 if ((result = detect_tp(dev)) != DETECTED_NONE)
1437 break;
1438 if (lp->adapter_cnf & A_CNF_AUI)
1439 if ((result = detect_aui(dev)) != DETECTED_NONE)
1440 break;
1441 if (lp->adapter_cnf & A_CNF_10B_2)
1442 if ((result = detect_bnc(dev)) != DETECTED_NONE)
1443 break;
1444 printk(KERN_ERR "%s: no media detected\n", dev->name);
1445 goto release_irq;
1446 }
1447 switch(result) {
1448 case DETECTED_NONE:
1449 printk(KERN_ERR "%s: no network cable attached to configured media\n", dev->name);
1450 goto release_irq;
1451 case DETECTED_RJ45H:
1452 printk(KERN_INFO "%s: using half-duplex 10Base-T (RJ-45)\n", dev->name);
1453 break;
1454 case DETECTED_RJ45F:
1455 printk(KERN_INFO "%s: using full-duplex 10Base-T (RJ-45)\n", dev->name);
1456 break;
1457 case DETECTED_AUI:
1458 printk(KERN_INFO "%s: using 10Base-5 (AUI)\n", dev->name);
1459 break;
1460 case DETECTED_BNC:
1461 printk(KERN_INFO "%s: using 10Base-2 (BNC)\n", dev->name);
1462 break;
1463 }
1464
1465 /* Turn on both receive and transmit operations */
1466 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_RX_ON | SERIAL_TX_ON);
1467
1468 /* Receive only error free packets addressed to this card */
1469 lp->rx_mode = 0;
1470 writereg(dev, PP_RxCTL, DEF_RX_ACCEPT);
1471
1472 lp->curr_rx_cfg = RX_OK_ENBL | RX_CRC_ERROR_ENBL;
1473
1474 if (lp->isa_config & STREAM_TRANSFER)
1475 lp->curr_rx_cfg |= RX_STREAM_ENBL;
1476 #if ALLOW_DMA
1477 set_dma_cfg(dev);
1478 #endif
1479 writereg(dev, PP_RxCFG, lp->curr_rx_cfg);
1480
1481 writereg(dev, PP_TxCFG, TX_LOST_CRS_ENBL | TX_SQE_ERROR_ENBL | TX_OK_ENBL |
1482 TX_LATE_COL_ENBL | TX_JBR_ENBL | TX_ANY_COL_ENBL | TX_16_COL_ENBL);
1483
1484 writereg(dev, PP_BufCFG, READY_FOR_TX_ENBL | RX_MISS_COUNT_OVRFLOW_ENBL |
1485 #if ALLOW_DMA
1486 dma_bufcfg(dev) |
1487 #endif
1488 TX_COL_COUNT_OVRFLOW_ENBL | TX_UNDERRUN_ENBL);
1489
1490 /* now that we've got our act together, enable everything */
1491 writereg(dev, PP_BusCTL, ENABLE_IRQ
1492 | (dev->mem_start?MEMORY_ON : 0) /* turn memory on */
1493 #if ALLOW_DMA
1494 | dma_busctl(dev)
1495 #endif
1496 );
1497 netif_start_queue(dev);
1498 if (net_debug > 1)
1499 printk("cs89x0: net_open() succeeded\n");
1500 return 0;
1501 bad_out:
1502 return ret;
1503 }
1504
1505 static void net_timeout(struct net_device *dev)
1506 {
1507 /* If we get here, some higher level has decided we are broken.
1508 There should really be a "kick me" function call instead. */
1509 if (net_debug > 0) printk("%s: transmit timed out, %s?\n", dev->name,
1510 tx_done(dev) ? "IRQ conflict ?" : "network cable problem");
1511 /* Try to restart the adaptor. */
1512 netif_wake_queue(dev);
1513 }
1514
1515 static int net_send_packet(struct sk_buff *skb, struct net_device *dev)
1516 {
1517 struct net_local *lp = netdev_priv(dev);
1518
1519 if (net_debug > 3) {
1520 printk("%s: sent %d byte packet of type %x\n",
1521 dev->name, skb->len,
1522 (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]);
1523 }
1524
1525 /* keep the upload from being interrupted, since we
1526 ask the chip to start transmitting before the
1527 whole packet has been completely uploaded. */
1528
1529 spin_lock_irq(&lp->lock);
1530 netif_stop_queue(dev);
1531
1532 /* initiate a transmit sequence */
1533 writeword(dev->base_addr, TX_CMD_PORT, lp->send_cmd);
1534 writeword(dev->base_addr, TX_LEN_PORT, skb->len);
1535
1536 /* Test to see if the chip has allocated memory for the packet */
1537 if ((readreg(dev, PP_BusST) & READY_FOR_TX_NOW) == 0) {
1538 /*
1539 * Gasp! It hasn't. But that shouldn't happen since
1540 * we're waiting for TxOk, so return 1 and requeue this packet.
1541 */
1542
1543 spin_unlock_irq(&lp->lock);
1544 if (net_debug) printk("cs89x0: Tx buffer not free!\n");
1545 return 1;
1546 }
1547 /* Write the contents of the packet */
1548 writewords(dev->base_addr, TX_FRAME_PORT,skb->data,(skb->len+1) >>1);
1549 spin_unlock_irq(&lp->lock);
1550 lp->stats.tx_bytes += skb->len;
1551 dev->trans_start = jiffies;
1552 dev_kfree_skb (skb);
1553
1554 /*
1555 * We DO NOT call netif_wake_queue() here.
1556 * We also DO NOT call netif_start_queue().
1557 *
1558 * Either of these would cause another bottom half run through
1559 * net_send_packet() before this packet has fully gone out. That causes
1560 * us to hit the "Gasp!" above and the send is rescheduled. it runs like
1561 * a dog. We just return and wait for the Tx completion interrupt handler
1562 * to restart the netdevice layer
1563 */
1564
1565 return 0;
1566 }
1567
1568 /* The typical workload of the driver:
1569 Handle the network interface interrupts. */
1570
1571 static irqreturn_t net_interrupt(int irq, void *dev_id)
1572 {
1573 struct net_device *dev = dev_id;
1574 struct net_local *lp;
1575 int ioaddr, status;
1576 int handled = 0;
1577
1578 ioaddr = dev->base_addr;
1579 lp = netdev_priv(dev);
1580
1581 /* we MUST read all the events out of the ISQ, otherwise we'll never
1582 get interrupted again. As a consequence, we can't have any limit
1583 on the number of times we loop in the interrupt handler. The
1584 hardware guarantees that eventually we'll run out of events. Of
1585 course, if you're on a slow machine, and packets are arriving
1586 faster than you can read them off, you're screwed. Hasta la
1587 vista, baby! */
1588 while ((status = readword(dev->base_addr, ISQ_PORT))) {
1589 if (net_debug > 4)printk("%s: event=%04x\n", dev->name, status);
1590 handled = 1;
1591 switch(status & ISQ_EVENT_MASK) {
1592 case ISQ_RECEIVER_EVENT:
1593 /* Got a packet(s). */
1594 net_rx(dev);
1595 break;
1596 case ISQ_TRANSMITTER_EVENT:
1597 lp->stats.tx_packets++;
1598 netif_wake_queue(dev); /* Inform upper layers. */
1599 if ((status & ( TX_OK |
1600 TX_LOST_CRS |
1601 TX_SQE_ERROR |
1602 TX_LATE_COL |
1603 TX_16_COL)) != TX_OK) {
1604 if ((status & TX_OK) == 0) lp->stats.tx_errors++;
1605 if (status & TX_LOST_CRS) lp->stats.tx_carrier_errors++;
1606 if (status & TX_SQE_ERROR) lp->stats.tx_heartbeat_errors++;
1607 if (status & TX_LATE_COL) lp->stats.tx_window_errors++;
1608 if (status & TX_16_COL) lp->stats.tx_aborted_errors++;
1609 }
1610 break;
1611 case ISQ_BUFFER_EVENT:
1612 if (status & READY_FOR_TX) {
1613 /* we tried to transmit a packet earlier,
1614 but inexplicably ran out of buffers.
1615 That shouldn't happen since we only ever
1616 load one packet. Shrug. Do the right
1617 thing anyway. */
1618 netif_wake_queue(dev); /* Inform upper layers. */
1619 }
1620 if (status & TX_UNDERRUN) {
1621 if (net_debug > 0) printk("%s: transmit underrun\n", dev->name);
1622 lp->send_underrun++;
1623 if (lp->send_underrun == 3) lp->send_cmd = TX_AFTER_381;
1624 else if (lp->send_underrun == 6) lp->send_cmd = TX_AFTER_ALL;
1625 /* transmit cycle is done, although
1626 frame wasn't transmitted - this
1627 avoids having to wait for the upper
1628 layers to timeout on us, in the
1629 event of a tx underrun */
1630 netif_wake_queue(dev); /* Inform upper layers. */
1631 }
1632 #if ALLOW_DMA
1633 if (lp->use_dma && (status & RX_DMA)) {
1634 int count = readreg(dev, PP_DmaFrameCnt);
1635 while(count) {
1636 if (net_debug > 5)
1637 printk("%s: receiving %d DMA frames\n", dev->name, count);
1638 if (net_debug > 2 && count >1)
1639 printk("%s: receiving %d DMA frames\n", dev->name, count);
1640 dma_rx(dev);
1641 if (--count == 0)
1642 count = readreg(dev, PP_DmaFrameCnt);
1643 if (net_debug > 2 && count > 0)
1644 printk("%s: continuing with %d DMA frames\n", dev->name, count);
1645 }
1646 }
1647 #endif
1648 break;
1649 case ISQ_RX_MISS_EVENT:
1650 lp->stats.rx_missed_errors += (status >>6);
1651 break;
1652 case ISQ_TX_COL_EVENT:
1653 lp->stats.collisions += (status >>6);
1654 break;
1655 }
1656 }
1657 return IRQ_RETVAL(handled);
1658 }
1659
1660 static void
1661 count_rx_errors(int status, struct net_local *lp)
1662 {
1663 lp->stats.rx_errors++;
1664 if (status & RX_RUNT) lp->stats.rx_length_errors++;
1665 if (status & RX_EXTRA_DATA) lp->stats.rx_length_errors++;
1666 if (status & RX_CRC_ERROR) if (!(status & (RX_EXTRA_DATA|RX_RUNT)))
1667 /* per str 172 */
1668 lp->stats.rx_crc_errors++;
1669 if (status & RX_DRIBBLE) lp->stats.rx_frame_errors++;
1670 return;
1671 }
1672
1673 /* We have a good packet(s), get it/them out of the buffers. */
1674 static void
1675 net_rx(struct net_device *dev)
1676 {
1677 struct net_local *lp = netdev_priv(dev);
1678 struct sk_buff *skb;
1679 int status, length;
1680
1681 int ioaddr = dev->base_addr;
1682 status = readword(ioaddr, RX_FRAME_PORT);
1683 length = readword(ioaddr, RX_FRAME_PORT);
1684
1685 if ((status & RX_OK) == 0) {
1686 count_rx_errors(status, lp);
1687 return;
1688 }
1689
1690 /* Malloc up new buffer. */
1691 skb = dev_alloc_skb(length + 2);
1692 if (skb == NULL) {
1693 #if 0 /* Again, this seems a cruel thing to do */
1694 printk(KERN_WARNING "%s: Memory squeeze, dropping packet.\n", dev->name);
1695 #endif
1696 lp->stats.rx_dropped++;
1697 return;
1698 }
1699 skb_reserve(skb, 2); /* longword align L3 header */
1700
1701 readwords(ioaddr, RX_FRAME_PORT, skb_put(skb, length), length >> 1);
1702 if (length & 1)
1703 skb->data[length-1] = readword(ioaddr, RX_FRAME_PORT);
1704
1705 if (net_debug > 3) {
1706 printk( "%s: received %d byte packet of type %x\n",
1707 dev->name, length,
1708 (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]);
1709 }
1710
1711 skb->protocol=eth_type_trans(skb,dev);
1712 netif_rx(skb);
1713 dev->last_rx = jiffies;
1714 lp->stats.rx_packets++;
1715 lp->stats.rx_bytes += length;
1716 }
1717
1718 #if ALLOW_DMA
1719 static void release_dma_buff(struct net_local *lp)
1720 {
1721 if (lp->dma_buff) {
1722 free_pages((unsigned long)(lp->dma_buff), get_order(lp->dmasize * 1024));
1723 lp->dma_buff = NULL;
1724 }
1725 }
1726 #endif
1727
1728 /* The inverse routine to net_open(). */
1729 static int
1730 net_close(struct net_device *dev)
1731 {
1732 #if ALLOW_DMA
1733 struct net_local *lp = netdev_priv(dev);
1734 #endif
1735
1736 netif_stop_queue(dev);
1737
1738 writereg(dev, PP_RxCFG, 0);
1739 writereg(dev, PP_TxCFG, 0);
1740 writereg(dev, PP_BufCFG, 0);
1741 writereg(dev, PP_BusCTL, 0);
1742
1743 free_irq(dev->irq, dev);
1744
1745 #if ALLOW_DMA
1746 if (lp->use_dma && lp->dma) {
1747 free_dma(dev->dma);
1748 release_dma_buff(lp);
1749 }
1750 #endif
1751
1752 /* Update the statistics here. */
1753 return 0;
1754 }
1755
1756 /* Get the current statistics. This may be called with the card open or
1757 closed. */
1758 static struct net_device_stats *
1759 net_get_stats(struct net_device *dev)
1760 {
1761 struct net_local *lp = netdev_priv(dev);
1762 unsigned long flags;
1763
1764 spin_lock_irqsave(&lp->lock, flags);
1765 /* Update the statistics from the device registers. */
1766 lp->stats.rx_missed_errors += (readreg(dev, PP_RxMiss) >> 6);
1767 lp->stats.collisions += (readreg(dev, PP_TxCol) >> 6);
1768 spin_unlock_irqrestore(&lp->lock, flags);
1769
1770 return &lp->stats;
1771 }
1772
1773 static void set_multicast_list(struct net_device *dev)
1774 {
1775 struct net_local *lp = netdev_priv(dev);
1776 unsigned long flags;
1777
1778 spin_lock_irqsave(&lp->lock, flags);
1779 if(dev->flags&IFF_PROMISC)
1780 {
1781 lp->rx_mode = RX_ALL_ACCEPT;
1782 }
1783 else if((dev->flags&IFF_ALLMULTI)||dev->mc_list)
1784 {
1785 /* The multicast-accept list is initialized to accept-all, and we
1786 rely on higher-level filtering for now. */
1787 lp->rx_mode = RX_MULTCAST_ACCEPT;
1788 }
1789 else
1790 lp->rx_mode = 0;
1791
1792 writereg(dev, PP_RxCTL, DEF_RX_ACCEPT | lp->rx_mode);
1793
1794 /* in promiscuous mode, we accept errored packets, so we have to enable interrupts on them also */
1795 writereg(dev, PP_RxCFG, lp->curr_rx_cfg |
1796 (lp->rx_mode == RX_ALL_ACCEPT? (RX_CRC_ERROR_ENBL|RX_RUNT_ENBL|RX_EXTRA_DATA_ENBL) : 0));
1797 spin_unlock_irqrestore(&lp->lock, flags);
1798 }
1799
1800
1801 static int set_mac_address(struct net_device *dev, void *p)
1802 {
1803 int i;
1804 struct sockaddr *addr = p;
1805
1806 if (netif_running(dev))
1807 return -EBUSY;
1808
1809 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1810
1811 if (net_debug) {
1812 DECLARE_MAC_BUF(mac);
1813 printk("%s: Setting MAC address to %s.\n",
1814 dev->name, print_mac(mac, dev->dev_addr));
1815 }
1816 /* set the Ethernet address */
1817 for (i=0; i < ETH_ALEN/2; i++)
1818 writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8));
1819
1820 return 0;
1821 }
1822
1823 #ifdef MODULE
1824
1825 static struct net_device *dev_cs89x0;
1826
1827 /*
1828 * Support the 'debug' module parm even if we're compiled for non-debug to
1829 * avoid breaking someone's startup scripts
1830 */
1831
1832 static int io;
1833 static int irq;
1834 static int debug;
1835 static char media[8];
1836 static int duplex=-1;
1837
1838 static int use_dma; /* These generate unused var warnings if ALLOW_DMA = 0 */
1839 static int dma;
1840 static int dmasize=16; /* or 64 */
1841
1842 module_param(io, int, 0);
1843 module_param(irq, int, 0);
1844 module_param(debug, int, 0);
1845 module_param_string(media, media, sizeof(media), 0);
1846 module_param(duplex, int, 0);
1847 module_param(dma , int, 0);
1848 module_param(dmasize , int, 0);
1849 module_param(use_dma , int, 0);
1850 MODULE_PARM_DESC(io, "cs89x0 I/O base address");
1851 MODULE_PARM_DESC(irq, "cs89x0 IRQ number");
1852 #if DEBUGGING
1853 MODULE_PARM_DESC(debug, "cs89x0 debug level (0-6)");
1854 #else
1855 MODULE_PARM_DESC(debug, "(ignored)");
1856 #endif
1857 MODULE_PARM_DESC(media, "Set cs89x0 adapter(s) media type(s) (rj45,bnc,aui)");
1858 /* No other value than -1 for duplex seems to be currently interpreted */
1859 MODULE_PARM_DESC(duplex, "(ignored)");
1860 #if ALLOW_DMA
1861 MODULE_PARM_DESC(dma , "cs89x0 ISA DMA channel; ignored if use_dma=0");
1862 MODULE_PARM_DESC(dmasize , "cs89x0 DMA size in kB (16,64); ignored if use_dma=0");
1863 MODULE_PARM_DESC(use_dma , "cs89x0 using DMA (0-1)");
1864 #else
1865 MODULE_PARM_DESC(dma , "(ignored)");
1866 MODULE_PARM_DESC(dmasize , "(ignored)");
1867 MODULE_PARM_DESC(use_dma , "(ignored)");
1868 #endif
1869
1870 MODULE_AUTHOR("Mike Cruse, Russwll Nelson <nelson@crynwr.com>, Andrew Morton <andrewm@uow.edu.au>");
1871 MODULE_LICENSE("GPL");
1872
1873
1874 /*
1875 * media=t - specify media type
1876 or media=2
1877 or media=aui
1878 or medai=auto
1879 * duplex=0 - specify forced half/full/autonegotiate duplex
1880 * debug=# - debug level
1881
1882
1883 * Default Chip Configuration:
1884 * DMA Burst = enabled
1885 * IOCHRDY Enabled = enabled
1886 * UseSA = enabled
1887 * CS8900 defaults to half-duplex if not specified on command-line
1888 * CS8920 defaults to autoneg if not specified on command-line
1889 * Use reset defaults for other config parameters
1890
1891 * Assumptions:
1892 * media type specified is supported (circuitry is present)
1893 * if memory address is > 1MB, then required mem decode hw is present
1894 * if 10B-2, then agent other than driver will enable DC/DC converter
1895 (hw or software util)
1896
1897
1898 */
1899
1900 int __init init_module(void)
1901 {
1902 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
1903 struct net_local *lp;
1904 int ret = 0;
1905
1906 #if DEBUGGING
1907 net_debug = debug;
1908 #else
1909 debug = 0;
1910 #endif
1911 if (!dev)
1912 return -ENOMEM;
1913
1914 dev->irq = irq;
1915 dev->base_addr = io;
1916 lp = netdev_priv(dev);
1917
1918 #if ALLOW_DMA
1919 if (use_dma) {
1920 lp->use_dma = use_dma;
1921 lp->dma = dma;
1922 lp->dmasize = dmasize;
1923 }
1924 #endif
1925
1926 spin_lock_init(&lp->lock);
1927
1928 /* boy, they'd better get these right */
1929 if (!strcmp(media, "rj45"))
1930 lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T;
1931 else if (!strcmp(media, "aui"))
1932 lp->adapter_cnf = A_CNF_MEDIA_AUI | A_CNF_AUI;
1933 else if (!strcmp(media, "bnc"))
1934 lp->adapter_cnf = A_CNF_MEDIA_10B_2 | A_CNF_10B_2;
1935 else
1936 lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T;
1937
1938 if (duplex==-1)
1939 lp->auto_neg_cnf = AUTO_NEG_ENABLE;
1940
1941 if (io == 0) {
1942 printk(KERN_ERR "cs89x0.c: Module autoprobing not allowed.\n");
1943 printk(KERN_ERR "cs89x0.c: Append io=0xNNN\n");
1944 ret = -EPERM;
1945 goto out;
1946 } else if (io <= 0x1ff) {
1947 ret = -ENXIO;
1948 goto out;
1949 }
1950
1951 #if ALLOW_DMA
1952 if (use_dma && dmasize != 16 && dmasize != 64) {
1953 printk(KERN_ERR "cs89x0.c: dma size must be either 16K or 64K, not %dK\n", dmasize);
1954 ret = -EPERM;
1955 goto out;
1956 }
1957 #endif
1958 ret = cs89x0_probe1(dev, io, 1);
1959 if (ret)
1960 goto out;
1961
1962 dev_cs89x0 = dev;
1963 return 0;
1964 out:
1965 free_netdev(dev);
1966 return ret;
1967 }
1968
1969 void __exit
1970 cleanup_module(void)
1971 {
1972 unregister_netdev(dev_cs89x0);
1973 writeword(dev_cs89x0->base_addr, ADD_PORT, PP_ChipID);
1974 release_region(dev_cs89x0->base_addr, NETCARD_IO_EXTENT);
1975 free_netdev(dev_cs89x0);
1976 }
1977 #endif /* MODULE */
1978
1979 /*
1980 * Local variables:
1981 * version-control: t
1982 * kept-new-versions: 5
1983 * c-indent-level: 8
1984 * tab-width: 8
1985 * End:
1986 *
1987 */
Support for the Chinese Samsung S3C2440 based development boards