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Linux 2.6.16-rc6
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / sunbmac.c
blobcfaf47c63c58dd1fbeb6c3c5f59290fa49fad804
1 /* $Id: sunbmac.c,v 1.30 2002/01/15 06:48:55 davem Exp $
2 * sunbmac.c: Driver for Sparc BigMAC 100baseT ethernet adapters.
3 *
4 * Copyright (C) 1997, 1998, 1999, 2003 David S. Miller (davem@redhat.com)
5 */
6
7 #include <linux/module.h>
8
9 #include <linux/kernel.h>
10 #include <linux/types.h>
11 #include <linux/fcntl.h>
12 #include <linux/interrupt.h>
13 #include <linux/ioport.h>
14 #include <linux/in.h>
15 #include <linux/slab.h>
16 #include <linux/string.h>
17 #include <linux/delay.h>
18 #include <linux/init.h>
19 #include <linux/crc32.h>
20 #include <linux/errno.h>
21 #include <linux/ethtool.h>
22 #include <linux/netdevice.h>
23 #include <linux/etherdevice.h>
24 #include <linux/skbuff.h>
25 #include <linux/bitops.h>
26
27 #include <asm/auxio.h>
28 #include <asm/byteorder.h>
29 #include <asm/dma.h>
30 #include <asm/idprom.h>
31 #include <asm/io.h>
32 #include <asm/openprom.h>
33 #include <asm/oplib.h>
34 #include <asm/pgtable.h>
35 #include <asm/sbus.h>
36 #include <asm/system.h>
37
38 #include "sunbmac.h"
39
40 #define DRV_NAME "sunbmac"
41 #define DRV_VERSION "2.0"
42 #define DRV_RELDATE "11/24/03"
43 #define DRV_AUTHOR "David S. Miller (davem@redhat.com)"
44
45 static char version[] __initdata =
46 DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " " DRV_AUTHOR "\n";
47
48 MODULE_VERSION(DRV_VERSION);
49 MODULE_AUTHOR(DRV_AUTHOR);
50 MODULE_DESCRIPTION("Sun BigMAC 100baseT ethernet driver");
51 MODULE_LICENSE("GPL");
52
53 #undef DEBUG_PROBE
54 #undef DEBUG_TX
55 #undef DEBUG_IRQ
56
57 #ifdef DEBUG_PROBE
58 #define DP(x) printk x
59 #else
60 #define DP(x)
61 #endif
62
63 #ifdef DEBUG_TX
64 #define DTX(x) printk x
65 #else
66 #define DTX(x)
67 #endif
68
69 #ifdef DEBUG_IRQ
70 #define DIRQ(x) printk x
71 #else
72 #define DIRQ(x)
73 #endif
74
75 static struct bigmac *root_bigmac_dev;
76
77 #define DEFAULT_JAMSIZE 4 /* Toe jam */
78
79 #define QEC_RESET_TRIES 200
80
81 static int qec_global_reset(void __iomem *gregs)
82 {
83 int tries = QEC_RESET_TRIES;
84
85 sbus_writel(GLOB_CTRL_RESET, gregs + GLOB_CTRL);
86 while (--tries) {
87 if (sbus_readl(gregs + GLOB_CTRL) & GLOB_CTRL_RESET) {
88 udelay(20);
89 continue;
90 }
91 break;
92 }
93 if (tries)
94 return 0;
95 printk(KERN_ERR "BigMAC: Cannot reset the QEC.\n");
96 return -1;
97 }
98
99 static void qec_init(struct bigmac *bp)
100 {
101 void __iomem *gregs = bp->gregs;
102 struct sbus_dev *qec_sdev = bp->qec_sdev;
103 u8 bsizes = bp->bigmac_bursts;
104 u32 regval;
105
106 /* 64byte bursts do not work at the moment, do
107 * not even try to enable them. -DaveM
108 */
109 if (bsizes & DMA_BURST32)
110 regval = GLOB_CTRL_B32;
111 else
112 regval = GLOB_CTRL_B16;
113 sbus_writel(regval | GLOB_CTRL_BMODE, gregs + GLOB_CTRL);
114 sbus_writel(GLOB_PSIZE_2048, gregs + GLOB_PSIZE);
115
116 /* All of memsize is given to bigmac. */
117 sbus_writel(qec_sdev->reg_addrs[1].reg_size,
118 gregs + GLOB_MSIZE);
119
120 /* Half to the transmitter, half to the receiver. */
121 sbus_writel(qec_sdev->reg_addrs[1].reg_size >> 1,
122 gregs + GLOB_TSIZE);
123 sbus_writel(qec_sdev->reg_addrs[1].reg_size >> 1,
124 gregs + GLOB_RSIZE);
125 }
126
127 #define TX_RESET_TRIES 32
128 #define RX_RESET_TRIES 32
129
130 static void bigmac_tx_reset(void __iomem *bregs)
131 {
132 int tries = TX_RESET_TRIES;
133
134 sbus_writel(0, bregs + BMAC_TXCFG);
135
136 /* The fifo threshold bit is read-only and does
137 * not clear. -DaveM
138 */
139 while ((sbus_readl(bregs + BMAC_TXCFG) & ~(BIGMAC_TXCFG_FIFO)) != 0 &&
140 --tries != 0)
141 udelay(20);
142
143 if (!tries) {
144 printk(KERN_ERR "BIGMAC: Transmitter will not reset.\n");
145 printk(KERN_ERR "BIGMAC: tx_cfg is %08x\n",
146 sbus_readl(bregs + BMAC_TXCFG));
147 }
148 }
149
150 static void bigmac_rx_reset(void __iomem *bregs)
151 {
152 int tries = RX_RESET_TRIES;
153
154 sbus_writel(0, bregs + BMAC_RXCFG);
155 while (sbus_readl(bregs + BMAC_RXCFG) && --tries)
156 udelay(20);
157
158 if (!tries) {
159 printk(KERN_ERR "BIGMAC: Receiver will not reset.\n");
160 printk(KERN_ERR "BIGMAC: rx_cfg is %08x\n",
161 sbus_readl(bregs + BMAC_RXCFG));
162 }
163 }
164
165 /* Reset the transmitter and receiver. */
166 static void bigmac_stop(struct bigmac *bp)
167 {
168 bigmac_tx_reset(bp->bregs);
169 bigmac_rx_reset(bp->bregs);
170 }
171
172 static void bigmac_get_counters(struct bigmac *bp, void __iomem *bregs)
173 {
174 struct net_device_stats *stats = &bp->enet_stats;
175
176 stats->rx_crc_errors += sbus_readl(bregs + BMAC_RCRCECTR);
177 sbus_writel(0, bregs + BMAC_RCRCECTR);
178
179 stats->rx_frame_errors += sbus_readl(bregs + BMAC_UNALECTR);
180 sbus_writel(0, bregs + BMAC_UNALECTR);
181
182 stats->rx_length_errors += sbus_readl(bregs + BMAC_GLECTR);
183 sbus_writel(0, bregs + BMAC_GLECTR);
184
185 stats->tx_aborted_errors += sbus_readl(bregs + BMAC_EXCTR);
186
187 stats->collisions +=
188 (sbus_readl(bregs + BMAC_EXCTR) +
189 sbus_readl(bregs + BMAC_LTCTR));
190 sbus_writel(0, bregs + BMAC_EXCTR);
191 sbus_writel(0, bregs + BMAC_LTCTR);
192 }
193
194 static void bigmac_clean_rings(struct bigmac *bp)
195 {
196 int i;
197
198 for (i = 0; i < RX_RING_SIZE; i++) {
199 if (bp->rx_skbs[i] != NULL) {
200 dev_kfree_skb_any(bp->rx_skbs[i]);
201 bp->rx_skbs[i] = NULL;
202 }
203 }
204
205 for (i = 0; i < TX_RING_SIZE; i++) {
206 if (bp->tx_skbs[i] != NULL) {
207 dev_kfree_skb_any(bp->tx_skbs[i]);
208 bp->tx_skbs[i] = NULL;
209 }
210 }
211 }
212
213 static void bigmac_init_rings(struct bigmac *bp, int from_irq)
214 {
215 struct bmac_init_block *bb = bp->bmac_block;
216 struct net_device *dev = bp->dev;
217 int i;
218 gfp_t gfp_flags = GFP_KERNEL;
219
220 if (from_irq || in_interrupt())
221 gfp_flags = GFP_ATOMIC;
222
223 bp->rx_new = bp->rx_old = bp->tx_new = bp->tx_old = 0;
224
225 /* Free any skippy bufs left around in the rings. */
226 bigmac_clean_rings(bp);
227
228 /* Now get new skbufs for the receive ring. */
229 for (i = 0; i < RX_RING_SIZE; i++) {
230 struct sk_buff *skb;
231
232 skb = big_mac_alloc_skb(RX_BUF_ALLOC_SIZE, gfp_flags);
233 if (!skb)
234 continue;
235
236 bp->rx_skbs[i] = skb;
237 skb->dev = dev;
238
239 /* Because we reserve afterwards. */
240 skb_put(skb, ETH_FRAME_LEN);
241 skb_reserve(skb, 34);
242
243 bb->be_rxd[i].rx_addr =
244 sbus_map_single(bp->bigmac_sdev, skb->data,
245 RX_BUF_ALLOC_SIZE - 34,
246 SBUS_DMA_FROMDEVICE);
247 bb->be_rxd[i].rx_flags =
248 (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
249 }
250
251 for (i = 0; i < TX_RING_SIZE; i++)
252 bb->be_txd[i].tx_flags = bb->be_txd[i].tx_addr = 0;
253 }
254
255 #define MGMT_CLKON (MGMT_PAL_INT_MDIO|MGMT_PAL_EXT_MDIO|MGMT_PAL_OENAB|MGMT_PAL_DCLOCK)
256 #define MGMT_CLKOFF (MGMT_PAL_INT_MDIO|MGMT_PAL_EXT_MDIO|MGMT_PAL_OENAB)
257
258 static void idle_transceiver(void __iomem *tregs)
259 {
260 int i = 20;
261
262 while (i--) {
263 sbus_writel(MGMT_CLKOFF, tregs + TCVR_MPAL);
264 sbus_readl(tregs + TCVR_MPAL);
265 sbus_writel(MGMT_CLKON, tregs + TCVR_MPAL);
266 sbus_readl(tregs + TCVR_MPAL);
267 }
268 }
269
270 static void write_tcvr_bit(struct bigmac *bp, void __iomem *tregs, int bit)
271 {
272 if (bp->tcvr_type == internal) {
273 bit = (bit & 1) << 3;
274 sbus_writel(bit | (MGMT_PAL_OENAB | MGMT_PAL_EXT_MDIO),
275 tregs + TCVR_MPAL);
276 sbus_readl(tregs + TCVR_MPAL);
277 sbus_writel(bit | MGMT_PAL_OENAB | MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK,
278 tregs + TCVR_MPAL);
279 sbus_readl(tregs + TCVR_MPAL);
280 } else if (bp->tcvr_type == external) {
281 bit = (bit & 1) << 2;
282 sbus_writel(bit | MGMT_PAL_INT_MDIO | MGMT_PAL_OENAB,
283 tregs + TCVR_MPAL);
284 sbus_readl(tregs + TCVR_MPAL);
285 sbus_writel(bit | MGMT_PAL_INT_MDIO | MGMT_PAL_OENAB | MGMT_PAL_DCLOCK,
286 tregs + TCVR_MPAL);
287 sbus_readl(tregs + TCVR_MPAL);
288 } else {
289 printk(KERN_ERR "write_tcvr_bit: No transceiver type known!\n");
290 }
291 }
292
293 static int read_tcvr_bit(struct bigmac *bp, void __iomem *tregs)
294 {
295 int retval = 0;
296
297 if (bp->tcvr_type == internal) {
298 sbus_writel(MGMT_PAL_EXT_MDIO, tregs + TCVR_MPAL);
299 sbus_readl(tregs + TCVR_MPAL);
300 sbus_writel(MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK,
301 tregs + TCVR_MPAL);
302 sbus_readl(tregs + TCVR_MPAL);
303 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_INT_MDIO) >> 3;
304 } else if (bp->tcvr_type == external) {
305 sbus_writel(MGMT_PAL_INT_MDIO, tregs + TCVR_MPAL);
306 sbus_readl(tregs + TCVR_MPAL);
307 sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_DCLOCK, tregs + TCVR_MPAL);
308 sbus_readl(tregs + TCVR_MPAL);
309 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_EXT_MDIO) >> 2;
310 } else {
311 printk(KERN_ERR "read_tcvr_bit: No transceiver type known!\n");
312 }
313 return retval;
314 }
315
316 static int read_tcvr_bit2(struct bigmac *bp, void __iomem *tregs)
317 {
318 int retval = 0;
319
320 if (bp->tcvr_type == internal) {
321 sbus_writel(MGMT_PAL_EXT_MDIO, tregs + TCVR_MPAL);
322 sbus_readl(tregs + TCVR_MPAL);
323 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_INT_MDIO) >> 3;
324 sbus_writel(MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK, tregs + TCVR_MPAL);
325 sbus_readl(tregs + TCVR_MPAL);
326 } else if (bp->tcvr_type == external) {
327 sbus_writel(MGMT_PAL_INT_MDIO, tregs + TCVR_MPAL);
328 sbus_readl(tregs + TCVR_MPAL);
329 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_EXT_MDIO) >> 2;
330 sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_DCLOCK, tregs + TCVR_MPAL);
331 sbus_readl(tregs + TCVR_MPAL);
332 } else {
333 printk(KERN_ERR "read_tcvr_bit2: No transceiver type known!\n");
334 }
335 return retval;
336 }
337
338 static void put_tcvr_byte(struct bigmac *bp,
339 void __iomem *tregs,
340 unsigned int byte)
341 {
342 int shift = 4;
343
344 do {
345 write_tcvr_bit(bp, tregs, ((byte >> shift) & 1));
346 shift -= 1;
347 } while (shift >= 0);
348 }
349
350 static void bigmac_tcvr_write(struct bigmac *bp, void __iomem *tregs,
351 int reg, unsigned short val)
352 {
353 int shift;
354
355 reg &= 0xff;
356 val &= 0xffff;
357 switch(bp->tcvr_type) {
358 case internal:
359 case external:
360 break;
361
362 default:
363 printk(KERN_ERR "bigmac_tcvr_read: Whoops, no known transceiver type.\n");
364 return;
365 };
366
367 idle_transceiver(tregs);
368 write_tcvr_bit(bp, tregs, 0);
369 write_tcvr_bit(bp, tregs, 1);
370 write_tcvr_bit(bp, tregs, 0);
371 write_tcvr_bit(bp, tregs, 1);
372
373 put_tcvr_byte(bp, tregs,
374 ((bp->tcvr_type == internal) ?
375 BIGMAC_PHY_INTERNAL : BIGMAC_PHY_EXTERNAL));
376
377 put_tcvr_byte(bp, tregs, reg);
378
379 write_tcvr_bit(bp, tregs, 1);
380 write_tcvr_bit(bp, tregs, 0);
381
382 shift = 15;
383 do {
384 write_tcvr_bit(bp, tregs, (val >> shift) & 1);
385 shift -= 1;
386 } while (shift >= 0);
387 }
388
389 static unsigned short bigmac_tcvr_read(struct bigmac *bp,
390 void __iomem *tregs,
391 int reg)
392 {
393 unsigned short retval = 0;
394
395 reg &= 0xff;
396 switch(bp->tcvr_type) {
397 case internal:
398 case external:
399 break;
400
401 default:
402 printk(KERN_ERR "bigmac_tcvr_read: Whoops, no known transceiver type.\n");
403 return 0xffff;
404 };
405
406 idle_transceiver(tregs);
407 write_tcvr_bit(bp, tregs, 0);
408 write_tcvr_bit(bp, tregs, 1);
409 write_tcvr_bit(bp, tregs, 1);
410 write_tcvr_bit(bp, tregs, 0);
411
412 put_tcvr_byte(bp, tregs,
413 ((bp->tcvr_type == internal) ?
414 BIGMAC_PHY_INTERNAL : BIGMAC_PHY_EXTERNAL));
415
416 put_tcvr_byte(bp, tregs, reg);
417
418 if (bp->tcvr_type == external) {
419 int shift = 15;
420
421 (void) read_tcvr_bit2(bp, tregs);
422 (void) read_tcvr_bit2(bp, tregs);
423
424 do {
425 int tmp;
426
427 tmp = read_tcvr_bit2(bp, tregs);
428 retval |= ((tmp & 1) << shift);
429 shift -= 1;
430 } while (shift >= 0);
431
432 (void) read_tcvr_bit2(bp, tregs);
433 (void) read_tcvr_bit2(bp, tregs);
434 (void) read_tcvr_bit2(bp, tregs);
435 } else {
436 int shift = 15;
437
438 (void) read_tcvr_bit(bp, tregs);
439 (void) read_tcvr_bit(bp, tregs);
440
441 do {
442 int tmp;
443
444 tmp = read_tcvr_bit(bp, tregs);
445 retval |= ((tmp & 1) << shift);
446 shift -= 1;
447 } while (shift >= 0);
448
449 (void) read_tcvr_bit(bp, tregs);
450 (void) read_tcvr_bit(bp, tregs);
451 (void) read_tcvr_bit(bp, tregs);
452 }
453 return retval;
454 }
455
456 static void bigmac_tcvr_init(struct bigmac *bp)
457 {
458 void __iomem *tregs = bp->tregs;
459 u32 mpal;
460
461 idle_transceiver(tregs);
462 sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK,
463 tregs + TCVR_MPAL);
464 sbus_readl(tregs + TCVR_MPAL);
465
466 /* Only the bit for the present transceiver (internal or
467 * external) will stick, set them both and see what stays.
468 */
469 sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_EXT_MDIO, tregs + TCVR_MPAL);
470 sbus_readl(tregs + TCVR_MPAL);
471 udelay(20);
472
473 mpal = sbus_readl(tregs + TCVR_MPAL);
474 if (mpal & MGMT_PAL_EXT_MDIO) {
475 bp->tcvr_type = external;
476 sbus_writel(~(TCVR_PAL_EXTLBACK | TCVR_PAL_MSENSE | TCVR_PAL_LTENABLE),
477 tregs + TCVR_TPAL);
478 sbus_readl(tregs + TCVR_TPAL);
479 } else if (mpal & MGMT_PAL_INT_MDIO) {
480 bp->tcvr_type = internal;
481 sbus_writel(~(TCVR_PAL_SERIAL | TCVR_PAL_EXTLBACK |
482 TCVR_PAL_MSENSE | TCVR_PAL_LTENABLE),
483 tregs + TCVR_TPAL);
484 sbus_readl(tregs + TCVR_TPAL);
485 } else {
486 printk(KERN_ERR "BIGMAC: AIEEE, neither internal nor "
487 "external MDIO available!\n");
488 printk(KERN_ERR "BIGMAC: mgmt_pal[%08x] tcvr_pal[%08x]\n",
489 sbus_readl(tregs + TCVR_MPAL),
490 sbus_readl(tregs + TCVR_TPAL));
491 }
492 }
493
494 static int bigmac_init(struct bigmac *, int);
495
496 static int try_next_permutation(struct bigmac *bp, void __iomem *tregs)
497 {
498 if (bp->sw_bmcr & BMCR_SPEED100) {
499 int timeout;
500
501 /* Reset the PHY. */
502 bp->sw_bmcr = (BMCR_ISOLATE | BMCR_PDOWN | BMCR_LOOPBACK);
503 bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
504 bp->sw_bmcr = (BMCR_RESET);
505 bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
506
507 timeout = 64;
508 while (--timeout) {
509 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
510 if ((bp->sw_bmcr & BMCR_RESET) == 0)
511 break;
512 udelay(20);
513 }
514 if (timeout == 0)
515 printk(KERN_ERR "%s: PHY reset failed.\n", bp->dev->name);
516
517 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
518
519 /* Now we try 10baseT. */
520 bp->sw_bmcr &= ~(BMCR_SPEED100);
521 bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
522 return 0;
523 }
524
525 /* We've tried them all. */
526 return -1;
527 }
528
529 static void bigmac_timer(unsigned long data)
530 {
531 struct bigmac *bp = (struct bigmac *) data;
532 void __iomem *tregs = bp->tregs;
533 int restart_timer = 0;
534
535 bp->timer_ticks++;
536 if (bp->timer_state == ltrywait) {
537 bp->sw_bmsr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMSR);
538 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
539 if (bp->sw_bmsr & BMSR_LSTATUS) {
540 printk(KERN_INFO "%s: Link is now up at %s.\n",
541 bp->dev->name,
542 (bp->sw_bmcr & BMCR_SPEED100) ?
543 "100baseT" : "10baseT");
544 bp->timer_state = asleep;
545 restart_timer = 0;
546 } else {
547 if (bp->timer_ticks >= 4) {
548 int ret;
549
550 ret = try_next_permutation(bp, tregs);
551 if (ret == -1) {
552 printk(KERN_ERR "%s: Link down, cable problem?\n",
553 bp->dev->name);
554 ret = bigmac_init(bp, 0);
555 if (ret) {
556 printk(KERN_ERR "%s: Error, cannot re-init the "
557 "BigMAC.\n", bp->dev->name);
558 }
559 return;
560 }
561 bp->timer_ticks = 0;
562 restart_timer = 1;
563 } else {
564 restart_timer = 1;
565 }
566 }
567 } else {
568 /* Can't happens.... */
569 printk(KERN_ERR "%s: Aieee, link timer is asleep but we got one anyways!\n",
570 bp->dev->name);
571 restart_timer = 0;
572 bp->timer_ticks = 0;
573 bp->timer_state = asleep; /* foo on you */
574 }
575
576 if (restart_timer != 0) {
577 bp->bigmac_timer.expires = jiffies + ((12 * HZ)/10); /* 1.2 sec. */
578 add_timer(&bp->bigmac_timer);
579 }
580 }
581
582 /* Well, really we just force the chip into 100baseT then
583 * 10baseT, each time checking for a link status.
584 */
585 static void bigmac_begin_auto_negotiation(struct bigmac *bp)
586 {
587 void __iomem *tregs = bp->tregs;
588 int timeout;
589
590 /* Grab new software copies of PHY registers. */
591 bp->sw_bmsr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMSR);
592 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
593
594 /* Reset the PHY. */
595 bp->sw_bmcr = (BMCR_ISOLATE | BMCR_PDOWN | BMCR_LOOPBACK);
596 bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
597 bp->sw_bmcr = (BMCR_RESET);
598 bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
599
600 timeout = 64;
601 while (--timeout) {
602 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
603 if ((bp->sw_bmcr & BMCR_RESET) == 0)
604 break;
605 udelay(20);
606 }
607 if (timeout == 0)
608 printk(KERN_ERR "%s: PHY reset failed.\n", bp->dev->name);
609
610 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
611
612 /* First we try 100baseT. */
613 bp->sw_bmcr |= BMCR_SPEED100;
614 bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
615
616 bp->timer_state = ltrywait;
617 bp->timer_ticks = 0;
618 bp->bigmac_timer.expires = jiffies + (12 * HZ) / 10;
619 bp->bigmac_timer.data = (unsigned long) bp;
620 bp->bigmac_timer.function = &bigmac_timer;
621 add_timer(&bp->bigmac_timer);
622 }
623
624 static int bigmac_init(struct bigmac *bp, int from_irq)
625 {
626 void __iomem *gregs = bp->gregs;
627 void __iomem *cregs = bp->creg;
628 void __iomem *bregs = bp->bregs;
629 unsigned char *e = &bp->dev->dev_addr[0];
630
631 /* Latch current counters into statistics. */
632 bigmac_get_counters(bp, bregs);
633
634 /* Reset QEC. */
635 qec_global_reset(gregs);
636
637 /* Init QEC. */
638 qec_init(bp);
639
640 /* Alloc and reset the tx/rx descriptor chains. */
641 bigmac_init_rings(bp, from_irq);
642
643 /* Initialize the PHY. */
644 bigmac_tcvr_init(bp);
645
646 /* Stop transmitter and receiver. */
647 bigmac_stop(bp);
648
649 /* Set hardware ethernet address. */
650 sbus_writel(((e[4] << 8) | e[5]), bregs + BMAC_MACADDR2);
651 sbus_writel(((e[2] << 8) | e[3]), bregs + BMAC_MACADDR1);
652 sbus_writel(((e[0] << 8) | e[1]), bregs + BMAC_MACADDR0);
653
654 /* Clear the hash table until mc upload occurs. */
655 sbus_writel(0, bregs + BMAC_HTABLE3);
656 sbus_writel(0, bregs + BMAC_HTABLE2);
657 sbus_writel(0, bregs + BMAC_HTABLE1);
658 sbus_writel(0, bregs + BMAC_HTABLE0);
659
660 /* Enable Big Mac hash table filter. */
661 sbus_writel(BIGMAC_RXCFG_HENABLE | BIGMAC_RXCFG_FIFO,
662 bregs + BMAC_RXCFG);
663 udelay(20);
664
665 /* Ok, configure the Big Mac transmitter. */
666 sbus_writel(BIGMAC_TXCFG_FIFO, bregs + BMAC_TXCFG);
667
668 /* The HME docs recommend to use the 10LSB of our MAC here. */
669 sbus_writel(((e[5] | e[4] << 8) & 0x3ff),
670 bregs + BMAC_RSEED);
671
672 /* Enable the output drivers no matter what. */
673 sbus_writel(BIGMAC_XCFG_ODENABLE | BIGMAC_XCFG_RESV,
674 bregs + BMAC_XIFCFG);
675
676 /* Tell the QEC where the ring descriptors are. */
677 sbus_writel(bp->bblock_dvma + bib_offset(be_rxd, 0),
678 cregs + CREG_RXDS);
679 sbus_writel(bp->bblock_dvma + bib_offset(be_txd, 0),
680 cregs + CREG_TXDS);
681
682 /* Setup the FIFO pointers into QEC local memory. */
683 sbus_writel(0, cregs + CREG_RXRBUFPTR);
684 sbus_writel(0, cregs + CREG_RXWBUFPTR);
685 sbus_writel(sbus_readl(gregs + GLOB_RSIZE),
686 cregs + CREG_TXRBUFPTR);
687 sbus_writel(sbus_readl(gregs + GLOB_RSIZE),
688 cregs + CREG_TXWBUFPTR);
689
690 /* Tell bigmac what interrupts we don't want to hear about. */
691 sbus_writel(BIGMAC_IMASK_GOTFRAME | BIGMAC_IMASK_SENTFRAME,
692 bregs + BMAC_IMASK);
693
694 /* Enable the various other irq's. */
695 sbus_writel(0, cregs + CREG_RIMASK);
696 sbus_writel(0, cregs + CREG_TIMASK);
697 sbus_writel(0, cregs + CREG_QMASK);
698 sbus_writel(0, cregs + CREG_BMASK);
699
700 /* Set jam size to a reasonable default. */
701 sbus_writel(DEFAULT_JAMSIZE, bregs + BMAC_JSIZE);
702
703 /* Clear collision counter. */
704 sbus_writel(0, cregs + CREG_CCNT);
705
706 /* Enable transmitter and receiver. */
707 sbus_writel(sbus_readl(bregs + BMAC_TXCFG) | BIGMAC_TXCFG_ENABLE,
708 bregs + BMAC_TXCFG);
709 sbus_writel(sbus_readl(bregs + BMAC_RXCFG) | BIGMAC_RXCFG_ENABLE,
710 bregs + BMAC_RXCFG);
711
712 /* Ok, start detecting link speed/duplex. */
713 bigmac_begin_auto_negotiation(bp);
714
715 /* Success. */
716 return 0;
717 }
718
719 /* Error interrupts get sent here. */
720 static void bigmac_is_medium_rare(struct bigmac *bp, u32 qec_status, u32 bmac_status)
721 {
722 printk(KERN_ERR "bigmac_is_medium_rare: ");
723 if (qec_status & (GLOB_STAT_ER | GLOB_STAT_BM)) {
724 if (qec_status & GLOB_STAT_ER)
725 printk("QEC_ERROR, ");
726 if (qec_status & GLOB_STAT_BM)
727 printk("QEC_BMAC_ERROR, ");
728 }
729 if (bmac_status & CREG_STAT_ERRORS) {
730 if (bmac_status & CREG_STAT_BERROR)
731 printk("BMAC_ERROR, ");
732 if (bmac_status & CREG_STAT_TXDERROR)
733 printk("TXD_ERROR, ");
734 if (bmac_status & CREG_STAT_TXLERR)
735 printk("TX_LATE_ERROR, ");
736 if (bmac_status & CREG_STAT_TXPERR)
737 printk("TX_PARITY_ERROR, ");
738 if (bmac_status & CREG_STAT_TXSERR)
739 printk("TX_SBUS_ERROR, ");
740
741 if (bmac_status & CREG_STAT_RXDROP)
742 printk("RX_DROP_ERROR, ");
743
744 if (bmac_status & CREG_STAT_RXSMALL)
745 printk("RX_SMALL_ERROR, ");
746 if (bmac_status & CREG_STAT_RXLERR)
747 printk("RX_LATE_ERROR, ");
748 if (bmac_status & CREG_STAT_RXPERR)
749 printk("RX_PARITY_ERROR, ");
750 if (bmac_status & CREG_STAT_RXSERR)
751 printk("RX_SBUS_ERROR, ");
752 }
753
754 printk(" RESET\n");
755 bigmac_init(bp, 1);
756 }
757
758 /* BigMAC transmit complete service routines. */
759 static void bigmac_tx(struct bigmac *bp)
760 {
761 struct be_txd *txbase = &bp->bmac_block->be_txd[0];
762 struct net_device *dev = bp->dev;
763 int elem;
764
765 spin_lock(&bp->lock);
766
767 elem = bp->tx_old;
768 DTX(("bigmac_tx: tx_old[%d] ", elem));
769 while (elem != bp->tx_new) {
770 struct sk_buff *skb;
771 struct be_txd *this = &txbase[elem];
772
773 DTX(("this(%p) [flags(%08x)addr(%08x)]",
774 this, this->tx_flags, this->tx_addr));
775
776 if (this->tx_flags & TXD_OWN)
777 break;
778 skb = bp->tx_skbs[elem];
779 bp->enet_stats.tx_packets++;
780 bp->enet_stats.tx_bytes += skb->len;
781 sbus_unmap_single(bp->bigmac_sdev,
782 this->tx_addr, skb->len,
783 SBUS_DMA_TODEVICE);
784
785 DTX(("skb(%p) ", skb));
786 bp->tx_skbs[elem] = NULL;
787 dev_kfree_skb_irq(skb);
788
789 elem = NEXT_TX(elem);
790 }
791 DTX((" DONE, tx_old=%d\n", elem));
792 bp->tx_old = elem;
793
794 if (netif_queue_stopped(dev) &&
795 TX_BUFFS_AVAIL(bp) > 0)
796 netif_wake_queue(bp->dev);
797
798 spin_unlock(&bp->lock);
799 }
800
801 /* BigMAC receive complete service routines. */
802 static void bigmac_rx(struct bigmac *bp)
803 {
804 struct be_rxd *rxbase = &bp->bmac_block->be_rxd[0];
805 struct be_rxd *this;
806 int elem = bp->rx_new, drops = 0;
807 u32 flags;
808
809 this = &rxbase[elem];
810 while (!((flags = this->rx_flags) & RXD_OWN)) {
811 struct sk_buff *skb;
812 int len = (flags & RXD_LENGTH); /* FCS not included */
813
814 /* Check for errors. */
815 if (len < ETH_ZLEN) {
816 bp->enet_stats.rx_errors++;
817 bp->enet_stats.rx_length_errors++;
818
819 drop_it:
820 /* Return it to the BigMAC. */
821 bp->enet_stats.rx_dropped++;
822 this->rx_flags =
823 (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
824 goto next;
825 }
826 skb = bp->rx_skbs[elem];
827 if (len > RX_COPY_THRESHOLD) {
828 struct sk_buff *new_skb;
829
830 /* Now refill the entry, if we can. */
831 new_skb = big_mac_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
832 if (new_skb == NULL) {
833 drops++;
834 goto drop_it;
835 }
836 sbus_unmap_single(bp->bigmac_sdev,
837 this->rx_addr,
838 RX_BUF_ALLOC_SIZE - 34,
839 SBUS_DMA_FROMDEVICE);
840 bp->rx_skbs[elem] = new_skb;
841 new_skb->dev = bp->dev;
842 skb_put(new_skb, ETH_FRAME_LEN);
843 skb_reserve(new_skb, 34);
844 this->rx_addr = sbus_map_single(bp->bigmac_sdev,
845 new_skb->data,
846 RX_BUF_ALLOC_SIZE - 34,
847 SBUS_DMA_FROMDEVICE);
848 this->rx_flags =
849 (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
850
851 /* Trim the original skb for the netif. */
852 skb_trim(skb, len);
853 } else {
854 struct sk_buff *copy_skb = dev_alloc_skb(len + 2);
855
856 if (copy_skb == NULL) {
857 drops++;
858 goto drop_it;
859 }
860 copy_skb->dev = bp->dev;
861 skb_reserve(copy_skb, 2);
862 skb_put(copy_skb, len);
863 sbus_dma_sync_single_for_cpu(bp->bigmac_sdev,
864 this->rx_addr, len,
865 SBUS_DMA_FROMDEVICE);
866 eth_copy_and_sum(copy_skb, (unsigned char *)skb->data, len, 0);
867 sbus_dma_sync_single_for_device(bp->bigmac_sdev,
868 this->rx_addr, len,
869 SBUS_DMA_FROMDEVICE);
870
871 /* Reuse original ring buffer. */
872 this->rx_flags =
873 (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
874
875 skb = copy_skb;
876 }
877
878 /* No checksums done by the BigMAC ;-( */
879 skb->protocol = eth_type_trans(skb, bp->dev);
880 netif_rx(skb);
881 bp->dev->last_rx = jiffies;
882 bp->enet_stats.rx_packets++;
883 bp->enet_stats.rx_bytes += len;
884 next:
885 elem = NEXT_RX(elem);
886 this = &rxbase[elem];
887 }
888 bp->rx_new = elem;
889 if (drops)
890 printk(KERN_NOTICE "%s: Memory squeeze, deferring packet.\n", bp->dev->name);
891 }
892
893 static irqreturn_t bigmac_interrupt(int irq, void *dev_id, struct pt_regs *regs)
894 {
895 struct bigmac *bp = (struct bigmac *) dev_id;
896 u32 qec_status, bmac_status;
897
898 DIRQ(("bigmac_interrupt: "));
899
900 /* Latch status registers now. */
901 bmac_status = sbus_readl(bp->creg + CREG_STAT);
902 qec_status = sbus_readl(bp->gregs + GLOB_STAT);
903
904 DIRQ(("qec_status=%08x bmac_status=%08x\n", qec_status, bmac_status));
905 if ((qec_status & (GLOB_STAT_ER | GLOB_STAT_BM)) ||
906 (bmac_status & CREG_STAT_ERRORS))
907 bigmac_is_medium_rare(bp, qec_status, bmac_status);
908
909 if (bmac_status & CREG_STAT_TXIRQ)
910 bigmac_tx(bp);
911
912 if (bmac_status & CREG_STAT_RXIRQ)
913 bigmac_rx(bp);
914
915 return IRQ_HANDLED;
916 }
917
918 static int bigmac_open(struct net_device *dev)
919 {
920 struct bigmac *bp = (struct bigmac *) dev->priv;
921 int ret;
922
923 ret = request_irq(dev->irq, &bigmac_interrupt, SA_SHIRQ, dev->name, bp);
924 if (ret) {
925 printk(KERN_ERR "BIGMAC: Can't order irq %d to go.\n", dev->irq);
926 return ret;
927 }
928 init_timer(&bp->bigmac_timer);
929 ret = bigmac_init(bp, 0);
930 if (ret)
931 free_irq(dev->irq, bp);
932 return ret;
933 }
934
935 static int bigmac_close(struct net_device *dev)
936 {
937 struct bigmac *bp = (struct bigmac *) dev->priv;
938
939 del_timer(&bp->bigmac_timer);
940 bp->timer_state = asleep;
941 bp->timer_ticks = 0;
942
943 bigmac_stop(bp);
944 bigmac_clean_rings(bp);
945 free_irq(dev->irq, bp);
946 return 0;
947 }
948
949 static void bigmac_tx_timeout(struct net_device *dev)
950 {
951 struct bigmac *bp = (struct bigmac *) dev->priv;
952
953 bigmac_init(bp, 0);
954 netif_wake_queue(dev);
955 }
956
957 /* Put a packet on the wire. */
958 static int bigmac_start_xmit(struct sk_buff *skb, struct net_device *dev)
959 {
960 struct bigmac *bp = (struct bigmac *) dev->priv;
961 int len, entry;
962 u32 mapping;
963
964 len = skb->len;
965 mapping = sbus_map_single(bp->bigmac_sdev, skb->data, len, SBUS_DMA_TODEVICE);
966
967 /* Avoid a race... */
968 spin_lock_irq(&bp->lock);
969 entry = bp->tx_new;
970 DTX(("bigmac_start_xmit: len(%d) entry(%d)\n", len, entry));
971 bp->bmac_block->be_txd[entry].tx_flags = TXD_UPDATE;
972 bp->tx_skbs[entry] = skb;
973 bp->bmac_block->be_txd[entry].tx_addr = mapping;
974 bp->bmac_block->be_txd[entry].tx_flags =
975 (TXD_OWN | TXD_SOP | TXD_EOP | (len & TXD_LENGTH));
976 bp->tx_new = NEXT_TX(entry);
977 if (TX_BUFFS_AVAIL(bp) <= 0)
978 netif_stop_queue(dev);
979 spin_unlock_irq(&bp->lock);
980
981 /* Get it going. */
982 sbus_writel(CREG_CTRL_TWAKEUP, bp->creg + CREG_CTRL);
983
984
985 dev->trans_start = jiffies;
986
987 return 0;
988 }
989
990 static struct net_device_stats *bigmac_get_stats(struct net_device *dev)
991 {
992 struct bigmac *bp = (struct bigmac *) dev->priv;
993
994 bigmac_get_counters(bp, bp->bregs);
995 return &bp->enet_stats;
996 }
997
998 static void bigmac_set_multicast(struct net_device *dev)
999 {
1000 struct bigmac *bp = (struct bigmac *) dev->priv;
1001 void __iomem *bregs = bp->bregs;
1002 struct dev_mc_list *dmi = dev->mc_list;
1003 char *addrs;
1004 int i;
1005 u32 tmp, crc;
1006
1007 /* Disable the receiver. The bit self-clears when
1008 * the operation is complete.
1009 */
1010 tmp = sbus_readl(bregs + BMAC_RXCFG);
1011 tmp &= ~(BIGMAC_RXCFG_ENABLE);
1012 sbus_writel(tmp, bregs + BMAC_RXCFG);
1013 while ((sbus_readl(bregs + BMAC_RXCFG) & BIGMAC_RXCFG_ENABLE) != 0)
1014 udelay(20);
1015
1016 if ((dev->flags & IFF_ALLMULTI) || (dev->mc_count > 64)) {
1017 sbus_writel(0xffff, bregs + BMAC_HTABLE0);
1018 sbus_writel(0xffff, bregs + BMAC_HTABLE1);
1019 sbus_writel(0xffff, bregs + BMAC_HTABLE2);
1020 sbus_writel(0xffff, bregs + BMAC_HTABLE3);
1021 } else if (dev->flags & IFF_PROMISC) {
1022 tmp = sbus_readl(bregs + BMAC_RXCFG);
1023 tmp |= BIGMAC_RXCFG_PMISC;
1024 sbus_writel(tmp, bregs + BMAC_RXCFG);
1025 } else {
1026 u16 hash_table[4];
1027
1028 for (i = 0; i < 4; i++)
1029 hash_table[i] = 0;
1030
1031 for (i = 0; i < dev->mc_count; i++) {
1032 addrs = dmi->dmi_addr;
1033 dmi = dmi->next;
1034
1035 if (!(*addrs & 1))
1036 continue;
1037
1038 crc = ether_crc_le(6, addrs);
1039 crc >>= 26;
1040 hash_table[crc >> 4] |= 1 << (crc & 0xf);
1041 }
1042 sbus_writel(hash_table[0], bregs + BMAC_HTABLE0);
1043 sbus_writel(hash_table[1], bregs + BMAC_HTABLE1);
1044 sbus_writel(hash_table[2], bregs + BMAC_HTABLE2);
1045 sbus_writel(hash_table[3], bregs + BMAC_HTABLE3);
1046 }
1047
1048 /* Re-enable the receiver. */
1049 tmp = sbus_readl(bregs + BMAC_RXCFG);
1050 tmp |= BIGMAC_RXCFG_ENABLE;
1051 sbus_writel(tmp, bregs + BMAC_RXCFG);
1052 }
1053
1054 /* Ethtool support... */
1055 static void bigmac_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1056 {
1057 struct bigmac *bp = dev->priv;
1058
1059 strcpy(info->driver, "sunbmac");
1060 strcpy(info->version, "2.0");
1061 sprintf(info->bus_info, "SBUS:%d",
1062 bp->qec_sdev->slot);
1063 }
1064
1065 static u32 bigmac_get_link(struct net_device *dev)
1066 {
1067 struct bigmac *bp = dev->priv;
1068
1069 spin_lock_irq(&bp->lock);
1070 bp->sw_bmsr = bigmac_tcvr_read(bp, bp->tregs, BIGMAC_BMSR);
1071 spin_unlock_irq(&bp->lock);
1072
1073 return (bp->sw_bmsr & BMSR_LSTATUS);
1074 }
1075
1076 static struct ethtool_ops bigmac_ethtool_ops = {
1077 .get_drvinfo = bigmac_get_drvinfo,
1078 .get_link = bigmac_get_link,
1079 };
1080
1081 static int __init bigmac_ether_init(struct sbus_dev *qec_sdev)
1082 {
1083 struct net_device *dev;
1084 static int version_printed;
1085 struct bigmac *bp;
1086 u8 bsizes, bsizes_more;
1087 int i;
1088
1089 /* Get a new device struct for this interface. */
1090 dev = alloc_etherdev(sizeof(struct bigmac));
1091 if (!dev)
1092 return -ENOMEM;
1093 SET_MODULE_OWNER(dev);
1094
1095 if (version_printed++ == 0)
1096 printk(KERN_INFO "%s", version);
1097
1098 dev->base_addr = (long) qec_sdev;
1099 for (i = 0; i < 6; i++)
1100 dev->dev_addr[i] = idprom->id_ethaddr[i];
1101
1102 /* Setup softc, with backpointers to QEC and BigMAC SBUS device structs. */
1103 bp = dev->priv;
1104 bp->qec_sdev = qec_sdev;
1105 bp->bigmac_sdev = qec_sdev->child;
1106
1107 spin_lock_init(&bp->lock);
1108
1109 /* Verify the registers we expect, are actually there. */
1110 if ((bp->bigmac_sdev->num_registers != 3) ||
1111 (bp->qec_sdev->num_registers != 2)) {
1112 printk(KERN_ERR "BIGMAC: Device does not have 2 and 3 regs, it has %d and %d.\n",
1113 bp->qec_sdev->num_registers,
1114 bp->bigmac_sdev->num_registers);
1115 printk(KERN_ERR "BIGMAC: Would you like that for here or to go?\n");
1116 goto fail_and_cleanup;
1117 }
1118
1119 /* Map in QEC global control registers. */
1120 bp->gregs = sbus_ioremap(&bp->qec_sdev->resource[0], 0,
1121 GLOB_REG_SIZE, "BigMAC QEC GLobal Regs");
1122 if (!bp->gregs) {
1123 printk(KERN_ERR "BIGMAC: Cannot map QEC global registers.\n");
1124 goto fail_and_cleanup;
1125 }
1126
1127 /* Make sure QEC is in BigMAC mode. */
1128 if ((sbus_readl(bp->gregs + GLOB_CTRL) & 0xf0000000) != GLOB_CTRL_BMODE) {
1129 printk(KERN_ERR "BigMAC: AIEEE, QEC is not in BigMAC mode!\n");
1130 goto fail_and_cleanup;
1131 }
1132
1133 /* Reset the QEC. */
1134 if (qec_global_reset(bp->gregs))
1135 goto fail_and_cleanup;
1136
1137 /* Get supported SBUS burst sizes. */
1138 bsizes = prom_getintdefault(bp->qec_sdev->prom_node,
1139 "burst-sizes",
1140 0xff);
1141
1142 bsizes_more = prom_getintdefault(bp->qec_sdev->bus->prom_node,
1143 "burst-sizes",
1144 0xff);
1145
1146 bsizes &= 0xff;
1147 if (bsizes_more != 0xff)
1148 bsizes &= bsizes_more;
1149 if (bsizes == 0xff || (bsizes & DMA_BURST16) == 0 ||
1150 (bsizes & DMA_BURST32) == 0)
1151 bsizes = (DMA_BURST32 - 1);
1152 bp->bigmac_bursts = bsizes;
1153
1154 /* Perform QEC initialization. */
1155 qec_init(bp);
1156
1157 /* Map in the BigMAC channel registers. */
1158 bp->creg = sbus_ioremap(&bp->bigmac_sdev->resource[0], 0,
1159 CREG_REG_SIZE, "BigMAC QEC Channel Regs");
1160 if (!bp->creg) {
1161 printk(KERN_ERR "BIGMAC: Cannot map QEC channel registers.\n");
1162 goto fail_and_cleanup;
1163 }
1164
1165 /* Map in the BigMAC control registers. */
1166 bp->bregs = sbus_ioremap(&bp->bigmac_sdev->resource[1], 0,
1167 BMAC_REG_SIZE, "BigMAC Primary Regs");
1168 if (!bp->bregs) {
1169 printk(KERN_ERR "BIGMAC: Cannot map BigMAC primary registers.\n");
1170 goto fail_and_cleanup;
1171 }
1172
1173 /* Map in the BigMAC transceiver registers, this is how you poke at
1174 * the BigMAC's PHY.
1175 */
1176 bp->tregs = sbus_ioremap(&bp->bigmac_sdev->resource[2], 0,
1177 TCVR_REG_SIZE, "BigMAC Transceiver Regs");
1178 if (!bp->tregs) {
1179 printk(KERN_ERR "BIGMAC: Cannot map BigMAC transceiver registers.\n");
1180 goto fail_and_cleanup;
1181 }
1182
1183 /* Stop the BigMAC. */
1184 bigmac_stop(bp);
1185
1186 /* Allocate transmit/receive descriptor DVMA block. */
1187 bp->bmac_block = sbus_alloc_consistent(bp->bigmac_sdev,
1188 PAGE_SIZE,
1189 &bp->bblock_dvma);
1190 if (bp->bmac_block == NULL || bp->bblock_dvma == 0) {
1191 printk(KERN_ERR "BIGMAC: Cannot allocate consistent DMA.\n");
1192 goto fail_and_cleanup;
1193 }
1194
1195 /* Get the board revision of this BigMAC. */
1196 bp->board_rev = prom_getintdefault(bp->bigmac_sdev->prom_node,
1197 "board-version", 1);
1198
1199 /* Init auto-negotiation timer state. */
1200 init_timer(&bp->bigmac_timer);
1201 bp->timer_state = asleep;
1202 bp->timer_ticks = 0;
1203
1204 /* Backlink to generic net device struct. */
1205 bp->dev = dev;
1206
1207 /* Set links to our BigMAC open and close routines. */
1208 dev->open = &bigmac_open;
1209 dev->stop = &bigmac_close;
1210 dev->hard_start_xmit = &bigmac_start_xmit;
1211 dev->ethtool_ops = &bigmac_ethtool_ops;
1212
1213 /* Set links to BigMAC statistic and multi-cast loading code. */
1214 dev->get_stats = &bigmac_get_stats;
1215 dev->set_multicast_list = &bigmac_set_multicast;
1216
1217 dev->tx_timeout = &bigmac_tx_timeout;
1218 dev->watchdog_timeo = 5*HZ;
1219
1220 /* Finish net device registration. */
1221 dev->irq = bp->bigmac_sdev->irqs[0];
1222 dev->dma = 0;
1223
1224 if (register_netdev(dev)) {
1225 printk(KERN_ERR "BIGMAC: Cannot register device.\n");
1226 goto fail_and_cleanup;
1227 }
1228
1229 /* Put us into the list of instances attached for later driver
1230 * exit.
1231 */
1232 bp->next_module = root_bigmac_dev;
1233 root_bigmac_dev = bp;
1234
1235 printk(KERN_INFO "%s: BigMAC 100baseT Ethernet ", dev->name);
1236 for (i = 0; i < 6; i++)
1237 printk("%2.2x%c", dev->dev_addr[i],
1238 i == 5 ? ' ' : ':');
1239 printk("\n");
1240
1241 return 0;
1242
1243 fail_and_cleanup:
1244 /* Something went wrong, undo whatever we did so far. */
1245 /* Free register mappings if any. */
1246 if (bp->gregs)
1247 sbus_iounmap(bp->gregs, GLOB_REG_SIZE);
1248 if (bp->creg)
1249 sbus_iounmap(bp->creg, CREG_REG_SIZE);
1250 if (bp->bregs)
1251 sbus_iounmap(bp->bregs, BMAC_REG_SIZE);
1252 if (bp->tregs)
1253 sbus_iounmap(bp->tregs, TCVR_REG_SIZE);
1254
1255 if (bp->bmac_block)
1256 sbus_free_consistent(bp->bigmac_sdev,
1257 PAGE_SIZE,
1258 bp->bmac_block,
1259 bp->bblock_dvma);
1260
1261 /* This also frees the co-located 'dev->priv' */
1262 free_netdev(dev);
1263 return -ENODEV;
1264 }
1265
1266 /* QEC can be the parent of either QuadEthernet or
1267 * a BigMAC. We want the latter.
1268 */
1269 static int __init bigmac_match(struct sbus_dev *sdev)
1270 {
1271 struct sbus_dev *child = sdev->child;
1272
1273 if (strcmp(sdev->prom_name, "qec") != 0)
1274 return 0;
1275
1276 if (child == NULL)
1277 return 0;
1278
1279 if (strcmp(child->prom_name, "be") != 0)
1280 return 0;
1281
1282 return 1;
1283 }
1284
1285 static int __init bigmac_probe(void)
1286 {
1287 struct sbus_bus *sbus;
1288 struct sbus_dev *sdev = NULL;
1289 static int called;
1290 int cards = 0, v;
1291
1292 root_bigmac_dev = NULL;
1293
1294 if (called)
1295 return -ENODEV;
1296 called++;
1297
1298 for_each_sbus(sbus) {
1299 for_each_sbusdev(sdev, sbus) {
1300 if (bigmac_match(sdev)) {
1301 cards++;
1302 if ((v = bigmac_ether_init(sdev)))
1303 return v;
1304 }
1305 }
1306 }
1307 if (!cards)
1308 return -ENODEV;
1309 return 0;
1310 }
1311
1312 static void __exit bigmac_cleanup(void)
1313 {
1314 while (root_bigmac_dev) {
1315 struct bigmac *bp = root_bigmac_dev;
1316 struct bigmac *bp_nxt = root_bigmac_dev->next_module;
1317
1318 sbus_iounmap(bp->gregs, GLOB_REG_SIZE);
1319 sbus_iounmap(bp->creg, CREG_REG_SIZE);
1320 sbus_iounmap(bp->bregs, BMAC_REG_SIZE);
1321 sbus_iounmap(bp->tregs, TCVR_REG_SIZE);
1322 sbus_free_consistent(bp->bigmac_sdev,
1323 PAGE_SIZE,
1324 bp->bmac_block,
1325 bp->bblock_dvma);
1326
1327 unregister_netdev(bp->dev);
1328 free_netdev(bp->dev);
1329 root_bigmac_dev = bp_nxt;
1330 }
1331 }
1332
1333 module_init(bigmac_probe);
1334 module_exit(bigmac_cleanup);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree