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[TG3]: Add tagged status support.
[linux-2.6/verdex.git] / drivers / net / sunbmac.c
blobf88f5e32b7145164f916a58e2d23efe3d20fca76
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, gfp_flags = GFP_KERNEL;
218
219 if (from_irq || in_interrupt())
220 gfp_flags = GFP_ATOMIC;
221
222 bp->rx_new = bp->rx_old = bp->tx_new = bp->tx_old = 0;
223
224 /* Free any skippy bufs left around in the rings. */
225 bigmac_clean_rings(bp);
226
227 /* Now get new skbufs for the receive ring. */
228 for (i = 0; i < RX_RING_SIZE; i++) {
229 struct sk_buff *skb;
230
231 skb = big_mac_alloc_skb(RX_BUF_ALLOC_SIZE, gfp_flags);
232 if (!skb)
233 continue;
234
235 bp->rx_skbs[i] = skb;
236 skb->dev = dev;
237
238 /* Because we reserve afterwards. */
239 skb_put(skb, ETH_FRAME_LEN);
240 skb_reserve(skb, 34);
241
242 bb->be_rxd[i].rx_addr =
243 sbus_map_single(bp->bigmac_sdev, skb->data,
244 RX_BUF_ALLOC_SIZE - 34,
245 SBUS_DMA_FROMDEVICE);
246 bb->be_rxd[i].rx_flags =
247 (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
248 }
249
250 for (i = 0; i < TX_RING_SIZE; i++)
251 bb->be_txd[i].tx_flags = bb->be_txd[i].tx_addr = 0;
252 }
253
254 #define MGMT_CLKON (MGMT_PAL_INT_MDIO|MGMT_PAL_EXT_MDIO|MGMT_PAL_OENAB|MGMT_PAL_DCLOCK)
255 #define MGMT_CLKOFF (MGMT_PAL_INT_MDIO|MGMT_PAL_EXT_MDIO|MGMT_PAL_OENAB)
256
257 static void idle_transceiver(void __iomem *tregs)
258 {
259 int i = 20;
260
261 while (i--) {
262 sbus_writel(MGMT_CLKOFF, tregs + TCVR_MPAL);
263 sbus_readl(tregs + TCVR_MPAL);
264 sbus_writel(MGMT_CLKON, tregs + TCVR_MPAL);
265 sbus_readl(tregs + TCVR_MPAL);
266 }
267 }
268
269 static void write_tcvr_bit(struct bigmac *bp, void __iomem *tregs, int bit)
270 {
271 if (bp->tcvr_type == internal) {
272 bit = (bit & 1) << 3;
273 sbus_writel(bit | (MGMT_PAL_OENAB | MGMT_PAL_EXT_MDIO),
274 tregs + TCVR_MPAL);
275 sbus_readl(tregs + TCVR_MPAL);
276 sbus_writel(bit | MGMT_PAL_OENAB | MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK,
277 tregs + TCVR_MPAL);
278 sbus_readl(tregs + TCVR_MPAL);
279 } else if (bp->tcvr_type == external) {
280 bit = (bit & 1) << 2;
281 sbus_writel(bit | MGMT_PAL_INT_MDIO | MGMT_PAL_OENAB,
282 tregs + TCVR_MPAL);
283 sbus_readl(tregs + TCVR_MPAL);
284 sbus_writel(bit | MGMT_PAL_INT_MDIO | MGMT_PAL_OENAB | MGMT_PAL_DCLOCK,
285 tregs + TCVR_MPAL);
286 sbus_readl(tregs + TCVR_MPAL);
287 } else {
288 printk(KERN_ERR "write_tcvr_bit: No transceiver type known!\n");
289 }
290 }
291
292 static int read_tcvr_bit(struct bigmac *bp, void __iomem *tregs)
293 {
294 int retval = 0;
295
296 if (bp->tcvr_type == internal) {
297 sbus_writel(MGMT_PAL_EXT_MDIO, tregs + TCVR_MPAL);
298 sbus_readl(tregs + TCVR_MPAL);
299 sbus_writel(MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK,
300 tregs + TCVR_MPAL);
301 sbus_readl(tregs + TCVR_MPAL);
302 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_INT_MDIO) >> 3;
303 } else if (bp->tcvr_type == external) {
304 sbus_writel(MGMT_PAL_INT_MDIO, tregs + TCVR_MPAL);
305 sbus_readl(tregs + TCVR_MPAL);
306 sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_DCLOCK, tregs + TCVR_MPAL);
307 sbus_readl(tregs + TCVR_MPAL);
308 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_EXT_MDIO) >> 2;
309 } else {
310 printk(KERN_ERR "read_tcvr_bit: No transceiver type known!\n");
311 }
312 return retval;
313 }
314
315 static int read_tcvr_bit2(struct bigmac *bp, void __iomem *tregs)
316 {
317 int retval = 0;
318
319 if (bp->tcvr_type == internal) {
320 sbus_writel(MGMT_PAL_EXT_MDIO, tregs + TCVR_MPAL);
321 sbus_readl(tregs + TCVR_MPAL);
322 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_INT_MDIO) >> 3;
323 sbus_writel(MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK, tregs + TCVR_MPAL);
324 sbus_readl(tregs + TCVR_MPAL);
325 } else if (bp->tcvr_type == external) {
326 sbus_writel(MGMT_PAL_INT_MDIO, tregs + TCVR_MPAL);
327 sbus_readl(tregs + TCVR_MPAL);
328 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_EXT_MDIO) >> 2;
329 sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_DCLOCK, tregs + TCVR_MPAL);
330 sbus_readl(tregs + TCVR_MPAL);
331 } else {
332 printk(KERN_ERR "read_tcvr_bit2: No transceiver type known!\n");
333 }
334 return retval;
335 }
336
337 static void put_tcvr_byte(struct bigmac *bp,
338 void __iomem *tregs,
339 unsigned int byte)
340 {
341 int shift = 4;
342
343 do {
344 write_tcvr_bit(bp, tregs, ((byte >> shift) & 1));
345 shift -= 1;
346 } while (shift >= 0);
347 }
348
349 static void bigmac_tcvr_write(struct bigmac *bp, void __iomem *tregs,
350 int reg, unsigned short val)
351 {
352 int shift;
353
354 reg &= 0xff;
355 val &= 0xffff;
356 switch(bp->tcvr_type) {
357 case internal:
358 case external:
359 break;
360
361 default:
362 printk(KERN_ERR "bigmac_tcvr_read: Whoops, no known transceiver type.\n");
363 return;
364 };
365
366 idle_transceiver(tregs);
367 write_tcvr_bit(bp, tregs, 0);
368 write_tcvr_bit(bp, tregs, 1);
369 write_tcvr_bit(bp, tregs, 0);
370 write_tcvr_bit(bp, tregs, 1);
371
372 put_tcvr_byte(bp, tregs,
373 ((bp->tcvr_type == internal) ?
374 BIGMAC_PHY_INTERNAL : BIGMAC_PHY_EXTERNAL));
375
376 put_tcvr_byte(bp, tregs, reg);
377
378 write_tcvr_bit(bp, tregs, 1);
379 write_tcvr_bit(bp, tregs, 0);
380
381 shift = 15;
382 do {
383 write_tcvr_bit(bp, tregs, (val >> shift) & 1);
384 shift -= 1;
385 } while (shift >= 0);
386 }
387
388 static unsigned short bigmac_tcvr_read(struct bigmac *bp,
389 void __iomem *tregs,
390 int reg)
391 {
392 unsigned short retval = 0;
393
394 reg &= 0xff;
395 switch(bp->tcvr_type) {
396 case internal:
397 case external:
398 break;
399
400 default:
401 printk(KERN_ERR "bigmac_tcvr_read: Whoops, no known transceiver type.\n");
402 return 0xffff;
403 };
404
405 idle_transceiver(tregs);
406 write_tcvr_bit(bp, tregs, 0);
407 write_tcvr_bit(bp, tregs, 1);
408 write_tcvr_bit(bp, tregs, 1);
409 write_tcvr_bit(bp, tregs, 0);
410
411 put_tcvr_byte(bp, tregs,
412 ((bp->tcvr_type == internal) ?
413 BIGMAC_PHY_INTERNAL : BIGMAC_PHY_EXTERNAL));
414
415 put_tcvr_byte(bp, tregs, reg);
416
417 if (bp->tcvr_type == external) {
418 int shift = 15;
419
420 (void) read_tcvr_bit2(bp, tregs);
421 (void) read_tcvr_bit2(bp, tregs);
422
423 do {
424 int tmp;
425
426 tmp = read_tcvr_bit2(bp, tregs);
427 retval |= ((tmp & 1) << shift);
428 shift -= 1;
429 } while (shift >= 0);
430
431 (void) read_tcvr_bit2(bp, tregs);
432 (void) read_tcvr_bit2(bp, tregs);
433 (void) read_tcvr_bit2(bp, tregs);
434 } else {
435 int shift = 15;
436
437 (void) read_tcvr_bit(bp, tregs);
438 (void) read_tcvr_bit(bp, tregs);
439
440 do {
441 int tmp;
442
443 tmp = read_tcvr_bit(bp, tregs);
444 retval |= ((tmp & 1) << shift);
445 shift -= 1;
446 } while (shift >= 0);
447
448 (void) read_tcvr_bit(bp, tregs);
449 (void) read_tcvr_bit(bp, tregs);
450 (void) read_tcvr_bit(bp, tregs);
451 }
452 return retval;
453 }
454
455 static void bigmac_tcvr_init(struct bigmac *bp)
456 {
457 void __iomem *tregs = bp->tregs;
458 u32 mpal;
459
460 idle_transceiver(tregs);
461 sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK,
462 tregs + TCVR_MPAL);
463 sbus_readl(tregs + TCVR_MPAL);
464
465 /* Only the bit for the present transceiver (internal or
466 * external) will stick, set them both and see what stays.
467 */
468 sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_EXT_MDIO, tregs + TCVR_MPAL);
469 sbus_readl(tregs + TCVR_MPAL);
470 udelay(20);
471
472 mpal = sbus_readl(tregs + TCVR_MPAL);
473 if (mpal & MGMT_PAL_EXT_MDIO) {
474 bp->tcvr_type = external;
475 sbus_writel(~(TCVR_PAL_EXTLBACK | TCVR_PAL_MSENSE | TCVR_PAL_LTENABLE),
476 tregs + TCVR_TPAL);
477 sbus_readl(tregs + TCVR_TPAL);
478 } else if (mpal & MGMT_PAL_INT_MDIO) {
479 bp->tcvr_type = internal;
480 sbus_writel(~(TCVR_PAL_SERIAL | TCVR_PAL_EXTLBACK |
481 TCVR_PAL_MSENSE | TCVR_PAL_LTENABLE),
482 tregs + TCVR_TPAL);
483 sbus_readl(tregs + TCVR_TPAL);
484 } else {
485 printk(KERN_ERR "BIGMAC: AIEEE, neither internal nor "
486 "external MDIO available!\n");
487 printk(KERN_ERR "BIGMAC: mgmt_pal[%08x] tcvr_pal[%08x]\n",
488 sbus_readl(tregs + TCVR_MPAL),
489 sbus_readl(tregs + TCVR_TPAL));
490 }
491 }
492
493 static int bigmac_init(struct bigmac *, int);
494
495 static int try_next_permutation(struct bigmac *bp, void __iomem *tregs)
496 {
497 if (bp->sw_bmcr & BMCR_SPEED100) {
498 int timeout;
499
500 /* Reset the PHY. */
501 bp->sw_bmcr = (BMCR_ISOLATE | BMCR_PDOWN | BMCR_LOOPBACK);
502 bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
503 bp->sw_bmcr = (BMCR_RESET);
504 bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
505
506 timeout = 64;
507 while (--timeout) {
508 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
509 if ((bp->sw_bmcr & BMCR_RESET) == 0)
510 break;
511 udelay(20);
512 }
513 if (timeout == 0)
514 printk(KERN_ERR "%s: PHY reset failed.\n", bp->dev->name);
515
516 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
517
518 /* Now we try 10baseT. */
519 bp->sw_bmcr &= ~(BMCR_SPEED100);
520 bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
521 return 0;
522 }
523
524 /* We've tried them all. */
525 return -1;
526 }
527
528 static void bigmac_timer(unsigned long data)
529 {
530 struct bigmac *bp = (struct bigmac *) data;
531 void __iomem *tregs = bp->tregs;
532 int restart_timer = 0;
533
534 bp->timer_ticks++;
535 if (bp->timer_state == ltrywait) {
536 bp->sw_bmsr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMSR);
537 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
538 if (bp->sw_bmsr & BMSR_LSTATUS) {
539 printk(KERN_INFO "%s: Link is now up at %s.\n",
540 bp->dev->name,
541 (bp->sw_bmcr & BMCR_SPEED100) ?
542 "100baseT" : "10baseT");
543 bp->timer_state = asleep;
544 restart_timer = 0;
545 } else {
546 if (bp->timer_ticks >= 4) {
547 int ret;
548
549 ret = try_next_permutation(bp, tregs);
550 if (ret == -1) {
551 printk(KERN_ERR "%s: Link down, cable problem?\n",
552 bp->dev->name);
553 ret = bigmac_init(bp, 0);
554 if (ret) {
555 printk(KERN_ERR "%s: Error, cannot re-init the "
556 "BigMAC.\n", bp->dev->name);
557 }
558 return;
559 }
560 bp->timer_ticks = 0;
561 restart_timer = 1;
562 } else {
563 restart_timer = 1;
564 }
565 }
566 } else {
567 /* Can't happens.... */
568 printk(KERN_ERR "%s: Aieee, link timer is asleep but we got one anyways!\n",
569 bp->dev->name);
570 restart_timer = 0;
571 bp->timer_ticks = 0;
572 bp->timer_state = asleep; /* foo on you */
573 }
574
575 if (restart_timer != 0) {
576 bp->bigmac_timer.expires = jiffies + ((12 * HZ)/10); /* 1.2 sec. */
577 add_timer(&bp->bigmac_timer);
578 }
579 }
580
581 /* Well, really we just force the chip into 100baseT then
582 * 10baseT, each time checking for a link status.
583 */
584 static void bigmac_begin_auto_negotiation(struct bigmac *bp)
585 {
586 void __iomem *tregs = bp->tregs;
587 int timeout;
588
589 /* Grab new software copies of PHY registers. */
590 bp->sw_bmsr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMSR);
591 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
592
593 /* Reset the PHY. */
594 bp->sw_bmcr = (BMCR_ISOLATE | BMCR_PDOWN | BMCR_LOOPBACK);
595 bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
596 bp->sw_bmcr = (BMCR_RESET);
597 bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
598
599 timeout = 64;
600 while (--timeout) {
601 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
602 if ((bp->sw_bmcr & BMCR_RESET) == 0)
603 break;
604 udelay(20);
605 }
606 if (timeout == 0)
607 printk(KERN_ERR "%s: PHY reset failed.\n", bp->dev->name);
608
609 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
610
611 /* First we try 100baseT. */
612 bp->sw_bmcr |= BMCR_SPEED100;
613 bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
614
615 bp->timer_state = ltrywait;
616 bp->timer_ticks = 0;
617 bp->bigmac_timer.expires = jiffies + (12 * HZ) / 10;
618 bp->bigmac_timer.data = (unsigned long) bp;
619 bp->bigmac_timer.function = &bigmac_timer;
620 add_timer(&bp->bigmac_timer);
621 }
622
623 static int bigmac_init(struct bigmac *bp, int from_irq)
624 {
625 void __iomem *gregs = bp->gregs;
626 void __iomem *cregs = bp->creg;
627 void __iomem *bregs = bp->bregs;
628 unsigned char *e = &bp->dev->dev_addr[0];
629
630 /* Latch current counters into statistics. */
631 bigmac_get_counters(bp, bregs);
632
633 /* Reset QEC. */
634 qec_global_reset(gregs);
635
636 /* Init QEC. */
637 qec_init(bp);
638
639 /* Alloc and reset the tx/rx descriptor chains. */
640 bigmac_init_rings(bp, from_irq);
641
642 /* Initialize the PHY. */
643 bigmac_tcvr_init(bp);
644
645 /* Stop transmitter and receiver. */
646 bigmac_stop(bp);
647
648 /* Set hardware ethernet address. */
649 sbus_writel(((e[4] << 8) | e[5]), bregs + BMAC_MACADDR2);
650 sbus_writel(((e[2] << 8) | e[3]), bregs + BMAC_MACADDR1);
651 sbus_writel(((e[0] << 8) | e[1]), bregs + BMAC_MACADDR0);
652
653 /* Clear the hash table until mc upload occurs. */
654 sbus_writel(0, bregs + BMAC_HTABLE3);
655 sbus_writel(0, bregs + BMAC_HTABLE2);
656 sbus_writel(0, bregs + BMAC_HTABLE1);
657 sbus_writel(0, bregs + BMAC_HTABLE0);
658
659 /* Enable Big Mac hash table filter. */
660 sbus_writel(BIGMAC_RXCFG_HENABLE | BIGMAC_RXCFG_FIFO,
661 bregs + BMAC_RXCFG);
662 udelay(20);
663
664 /* Ok, configure the Big Mac transmitter. */
665 sbus_writel(BIGMAC_TXCFG_FIFO, bregs + BMAC_TXCFG);
666
667 /* The HME docs recommend to use the 10LSB of our MAC here. */
668 sbus_writel(((e[5] | e[4] << 8) & 0x3ff),
669 bregs + BMAC_RSEED);
670
671 /* Enable the output drivers no matter what. */
672 sbus_writel(BIGMAC_XCFG_ODENABLE | BIGMAC_XCFG_RESV,
673 bregs + BMAC_XIFCFG);
674
675 /* Tell the QEC where the ring descriptors are. */
676 sbus_writel(bp->bblock_dvma + bib_offset(be_rxd, 0),
677 cregs + CREG_RXDS);
678 sbus_writel(bp->bblock_dvma + bib_offset(be_txd, 0),
679 cregs + CREG_TXDS);
680
681 /* Setup the FIFO pointers into QEC local memory. */
682 sbus_writel(0, cregs + CREG_RXRBUFPTR);
683 sbus_writel(0, cregs + CREG_RXWBUFPTR);
684 sbus_writel(sbus_readl(gregs + GLOB_RSIZE),
685 cregs + CREG_TXRBUFPTR);
686 sbus_writel(sbus_readl(gregs + GLOB_RSIZE),
687 cregs + CREG_TXWBUFPTR);
688
689 /* Tell bigmac what interrupts we don't want to hear about. */
690 sbus_writel(BIGMAC_IMASK_GOTFRAME | BIGMAC_IMASK_SENTFRAME,
691 bregs + BMAC_IMASK);
692
693 /* Enable the various other irq's. */
694 sbus_writel(0, cregs + CREG_RIMASK);
695 sbus_writel(0, cregs + CREG_TIMASK);
696 sbus_writel(0, cregs + CREG_QMASK);
697 sbus_writel(0, cregs + CREG_BMASK);
698
699 /* Set jam size to a reasonable default. */
700 sbus_writel(DEFAULT_JAMSIZE, bregs + BMAC_JSIZE);
701
702 /* Clear collision counter. */
703 sbus_writel(0, cregs + CREG_CCNT);
704
705 /* Enable transmitter and receiver. */
706 sbus_writel(sbus_readl(bregs + BMAC_TXCFG) | BIGMAC_TXCFG_ENABLE,
707 bregs + BMAC_TXCFG);
708 sbus_writel(sbus_readl(bregs + BMAC_RXCFG) | BIGMAC_RXCFG_ENABLE,
709 bregs + BMAC_RXCFG);
710
711 /* Ok, start detecting link speed/duplex. */
712 bigmac_begin_auto_negotiation(bp);
713
714 /* Success. */
715 return 0;
716 }
717
718 /* Error interrupts get sent here. */
719 static void bigmac_is_medium_rare(struct bigmac *bp, u32 qec_status, u32 bmac_status)
720 {
721 printk(KERN_ERR "bigmac_is_medium_rare: ");
722 if (qec_status & (GLOB_STAT_ER | GLOB_STAT_BM)) {
723 if (qec_status & GLOB_STAT_ER)
724 printk("QEC_ERROR, ");
725 if (qec_status & GLOB_STAT_BM)
726 printk("QEC_BMAC_ERROR, ");
727 }
728 if (bmac_status & CREG_STAT_ERRORS) {
729 if (bmac_status & CREG_STAT_BERROR)
730 printk("BMAC_ERROR, ");
731 if (bmac_status & CREG_STAT_TXDERROR)
732 printk("TXD_ERROR, ");
733 if (bmac_status & CREG_STAT_TXLERR)
734 printk("TX_LATE_ERROR, ");
735 if (bmac_status & CREG_STAT_TXPERR)
736 printk("TX_PARITY_ERROR, ");
737 if (bmac_status & CREG_STAT_TXSERR)
738 printk("TX_SBUS_ERROR, ");
739
740 if (bmac_status & CREG_STAT_RXDROP)
741 printk("RX_DROP_ERROR, ");
742
743 if (bmac_status & CREG_STAT_RXSMALL)
744 printk("RX_SMALL_ERROR, ");
745 if (bmac_status & CREG_STAT_RXLERR)
746 printk("RX_LATE_ERROR, ");
747 if (bmac_status & CREG_STAT_RXPERR)
748 printk("RX_PARITY_ERROR, ");
749 if (bmac_status & CREG_STAT_RXSERR)
750 printk("RX_SBUS_ERROR, ");
751 }
752
753 printk(" RESET\n");
754 bigmac_init(bp, 1);
755 }
756
757 /* BigMAC transmit complete service routines. */
758 static void bigmac_tx(struct bigmac *bp)
759 {
760 struct be_txd *txbase = &bp->bmac_block->be_txd[0];
761 struct net_device *dev = bp->dev;
762 int elem;
763
764 spin_lock(&bp->lock);
765
766 elem = bp->tx_old;
767 DTX(("bigmac_tx: tx_old[%d] ", elem));
768 while (elem != bp->tx_new) {
769 struct sk_buff *skb;
770 struct be_txd *this = &txbase[elem];
771
772 DTX(("this(%p) [flags(%08x)addr(%08x)]",
773 this, this->tx_flags, this->tx_addr));
774
775 if (this->tx_flags & TXD_OWN)
776 break;
777 skb = bp->tx_skbs[elem];
778 bp->enet_stats.tx_packets++;
779 bp->enet_stats.tx_bytes += skb->len;
780 sbus_unmap_single(bp->bigmac_sdev,
781 this->tx_addr, skb->len,
782 SBUS_DMA_TODEVICE);
783
784 DTX(("skb(%p) ", skb));
785 bp->tx_skbs[elem] = NULL;
786 dev_kfree_skb_irq(skb);
787
788 elem = NEXT_TX(elem);
789 }
790 DTX((" DONE, tx_old=%d\n", elem));
791 bp->tx_old = elem;
792
793 if (netif_queue_stopped(dev) &&
794 TX_BUFFS_AVAIL(bp) > 0)
795 netif_wake_queue(bp->dev);
796
797 spin_unlock(&bp->lock);
798 }
799
800 /* BigMAC receive complete service routines. */
801 static void bigmac_rx(struct bigmac *bp)
802 {
803 struct be_rxd *rxbase = &bp->bmac_block->be_rxd[0];
804 struct be_rxd *this;
805 int elem = bp->rx_new, drops = 0;
806 u32 flags;
807
808 this = &rxbase[elem];
809 while (!((flags = this->rx_flags) & RXD_OWN)) {
810 struct sk_buff *skb;
811 int len = (flags & RXD_LENGTH); /* FCS not included */
812
813 /* Check for errors. */
814 if (len < ETH_ZLEN) {
815 bp->enet_stats.rx_errors++;
816 bp->enet_stats.rx_length_errors++;
817
818 drop_it:
819 /* Return it to the BigMAC. */
820 bp->enet_stats.rx_dropped++;
821 this->rx_flags =
822 (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
823 goto next;
824 }
825 skb = bp->rx_skbs[elem];
826 if (len > RX_COPY_THRESHOLD) {
827 struct sk_buff *new_skb;
828
829 /* Now refill the entry, if we can. */
830 new_skb = big_mac_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
831 if (new_skb == NULL) {
832 drops++;
833 goto drop_it;
834 }
835 sbus_unmap_single(bp->bigmac_sdev,
836 this->rx_addr,
837 RX_BUF_ALLOC_SIZE - 34,
838 SBUS_DMA_FROMDEVICE);
839 bp->rx_skbs[elem] = new_skb;
840 new_skb->dev = bp->dev;
841 skb_put(new_skb, ETH_FRAME_LEN);
842 skb_reserve(new_skb, 34);
843 this->rx_addr = sbus_map_single(bp->bigmac_sdev,
844 new_skb->data,
845 RX_BUF_ALLOC_SIZE - 34,
846 SBUS_DMA_FROMDEVICE);
847 this->rx_flags =
848 (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
849
850 /* Trim the original skb for the netif. */
851 skb_trim(skb, len);
852 } else {
853 struct sk_buff *copy_skb = dev_alloc_skb(len + 2);
854
855 if (copy_skb == NULL) {
856 drops++;
857 goto drop_it;
858 }
859 copy_skb->dev = bp->dev;
860 skb_reserve(copy_skb, 2);
861 skb_put(copy_skb, len);
862 sbus_dma_sync_single_for_cpu(bp->bigmac_sdev,
863 this->rx_addr, len,
864 SBUS_DMA_FROMDEVICE);
865 eth_copy_and_sum(copy_skb, (unsigned char *)skb->data, len, 0);
866 sbus_dma_sync_single_for_device(bp->bigmac_sdev,
867 this->rx_addr, len,
868 SBUS_DMA_FROMDEVICE);
869
870 /* Reuse original ring buffer. */
871 this->rx_flags =
872 (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
873
874 skb = copy_skb;
875 }
876
877 /* No checksums done by the BigMAC ;-( */
878 skb->protocol = eth_type_trans(skb, bp->dev);
879 netif_rx(skb);
880 bp->dev->last_rx = jiffies;
881 bp->enet_stats.rx_packets++;
882 bp->enet_stats.rx_bytes += len;
883 next:
884 elem = NEXT_RX(elem);
885 this = &rxbase[elem];
886 }
887 bp->rx_new = elem;
888 if (drops)
889 printk(KERN_NOTICE "%s: Memory squeeze, deferring packet.\n", bp->dev->name);
890 }
891
892 static irqreturn_t bigmac_interrupt(int irq, void *dev_id, struct pt_regs *regs)
893 {
894 struct bigmac *bp = (struct bigmac *) dev_id;
895 u32 qec_status, bmac_status;
896
897 DIRQ(("bigmac_interrupt: "));
898
899 /* Latch status registers now. */
900 bmac_status = sbus_readl(bp->creg + CREG_STAT);
901 qec_status = sbus_readl(bp->gregs + GLOB_STAT);
902
903 DIRQ(("qec_status=%08x bmac_status=%08x\n", qec_status, bmac_status));
904 if ((qec_status & (GLOB_STAT_ER | GLOB_STAT_BM)) ||
905 (bmac_status & CREG_STAT_ERRORS))
906 bigmac_is_medium_rare(bp, qec_status, bmac_status);
907
908 if (bmac_status & CREG_STAT_TXIRQ)
909 bigmac_tx(bp);
910
911 if (bmac_status & CREG_STAT_RXIRQ)
912 bigmac_rx(bp);
913
914 return IRQ_HANDLED;
915 }
916
917 static int bigmac_open(struct net_device *dev)
918 {
919 struct bigmac *bp = (struct bigmac *) dev->priv;
920 int ret;
921
922 ret = request_irq(dev->irq, &bigmac_interrupt, SA_SHIRQ, dev->name, bp);
923 if (ret) {
924 printk(KERN_ERR "BIGMAC: Can't order irq %d to go.\n", dev->irq);
925 return ret;
926 }
927 init_timer(&bp->bigmac_timer);
928 ret = bigmac_init(bp, 0);
929 if (ret)
930 free_irq(dev->irq, bp);
931 return ret;
932 }
933
934 static int bigmac_close(struct net_device *dev)
935 {
936 struct bigmac *bp = (struct bigmac *) dev->priv;
937
938 del_timer(&bp->bigmac_timer);
939 bp->timer_state = asleep;
940 bp->timer_ticks = 0;
941
942 bigmac_stop(bp);
943 bigmac_clean_rings(bp);
944 free_irq(dev->irq, bp);
945 return 0;
946 }
947
948 static void bigmac_tx_timeout(struct net_device *dev)
949 {
950 struct bigmac *bp = (struct bigmac *) dev->priv;
951
952 bigmac_init(bp, 0);
953 netif_wake_queue(dev);
954 }
955
956 /* Put a packet on the wire. */
957 static int bigmac_start_xmit(struct sk_buff *skb, struct net_device *dev)
958 {
959 struct bigmac *bp = (struct bigmac *) dev->priv;
960 int len, entry;
961 u32 mapping;
962
963 len = skb->len;
964 mapping = sbus_map_single(bp->bigmac_sdev, skb->data, len, SBUS_DMA_TODEVICE);
965
966 /* Avoid a race... */
967 spin_lock_irq(&bp->lock);
968 entry = bp->tx_new;
969 DTX(("bigmac_start_xmit: len(%d) entry(%d)\n", len, entry));
970 bp->bmac_block->be_txd[entry].tx_flags = TXD_UPDATE;
971 bp->tx_skbs[entry] = skb;
972 bp->bmac_block->be_txd[entry].tx_addr = mapping;
973 bp->bmac_block->be_txd[entry].tx_flags =
974 (TXD_OWN | TXD_SOP | TXD_EOP | (len & TXD_LENGTH));
975 bp->tx_new = NEXT_TX(entry);
976 if (TX_BUFFS_AVAIL(bp) <= 0)
977 netif_stop_queue(dev);
978 spin_unlock_irq(&bp->lock);
979
980 /* Get it going. */
981 sbus_writel(CREG_CTRL_TWAKEUP, bp->creg + CREG_CTRL);
982
983
984 dev->trans_start = jiffies;
985
986 return 0;
987 }
988
989 static struct net_device_stats *bigmac_get_stats(struct net_device *dev)
990 {
991 struct bigmac *bp = (struct bigmac *) dev->priv;
992
993 bigmac_get_counters(bp, bp->bregs);
994 return &bp->enet_stats;
995 }
996
997 static void bigmac_set_multicast(struct net_device *dev)
998 {
999 struct bigmac *bp = (struct bigmac *) dev->priv;
1000 void __iomem *bregs = bp->bregs;
1001 struct dev_mc_list *dmi = dev->mc_list;
1002 char *addrs;
1003 int i;
1004 u32 tmp, crc;
1005
1006 /* Disable the receiver. The bit self-clears when
1007 * the operation is complete.
1008 */
1009 tmp = sbus_readl(bregs + BMAC_RXCFG);
1010 tmp &= ~(BIGMAC_RXCFG_ENABLE);
1011 sbus_writel(tmp, bregs + BMAC_RXCFG);
1012 while ((sbus_readl(bregs + BMAC_RXCFG) & BIGMAC_RXCFG_ENABLE) != 0)
1013 udelay(20);
1014
1015 if ((dev->flags & IFF_ALLMULTI) || (dev->mc_count > 64)) {
1016 sbus_writel(0xffff, bregs + BMAC_HTABLE0);
1017 sbus_writel(0xffff, bregs + BMAC_HTABLE1);
1018 sbus_writel(0xffff, bregs + BMAC_HTABLE2);
1019 sbus_writel(0xffff, bregs + BMAC_HTABLE3);
1020 } else if (dev->flags & IFF_PROMISC) {
1021 tmp = sbus_readl(bregs + BMAC_RXCFG);
1022 tmp |= BIGMAC_RXCFG_PMISC;
1023 sbus_writel(tmp, bregs + BMAC_RXCFG);
1024 } else {
1025 u16 hash_table[4];
1026
1027 for (i = 0; i < 4; i++)
1028 hash_table[i] = 0;
1029
1030 for (i = 0; i < dev->mc_count; i++) {
1031 addrs = dmi->dmi_addr;
1032 dmi = dmi->next;
1033
1034 if (!(*addrs & 1))
1035 continue;
1036
1037 crc = ether_crc_le(6, addrs);
1038 crc >>= 26;
1039 hash_table[crc >> 4] |= 1 << (crc & 0xf);
1040 }
1041 sbus_writel(hash_table[0], bregs + BMAC_HTABLE0);
1042 sbus_writel(hash_table[1], bregs + BMAC_HTABLE1);
1043 sbus_writel(hash_table[2], bregs + BMAC_HTABLE2);
1044 sbus_writel(hash_table[3], bregs + BMAC_HTABLE3);
1045 }
1046
1047 /* Re-enable the receiver. */
1048 tmp = sbus_readl(bregs + BMAC_RXCFG);
1049 tmp |= BIGMAC_RXCFG_ENABLE;
1050 sbus_writel(tmp, bregs + BMAC_RXCFG);
1051 }
1052
1053 /* Ethtool support... */
1054 static void bigmac_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1055 {
1056 struct bigmac *bp = dev->priv;
1057
1058 strcpy(info->driver, "sunbmac");
1059 strcpy(info->version, "2.0");
1060 sprintf(info->bus_info, "SBUS:%d",
1061 bp->qec_sdev->slot);
1062 }
1063
1064 static u32 bigmac_get_link(struct net_device *dev)
1065 {
1066 struct bigmac *bp = dev->priv;
1067
1068 spin_lock_irq(&bp->lock);
1069 bp->sw_bmsr = bigmac_tcvr_read(bp, bp->tregs, BIGMAC_BMSR);
1070 spin_unlock_irq(&bp->lock);
1071
1072 return (bp->sw_bmsr & BMSR_LSTATUS);
1073 }
1074
1075 static struct ethtool_ops bigmac_ethtool_ops = {
1076 .get_drvinfo = bigmac_get_drvinfo,
1077 .get_link = bigmac_get_link,
1078 };
1079
1080 static int __init bigmac_ether_init(struct sbus_dev *qec_sdev)
1081 {
1082 struct net_device *dev;
1083 static int version_printed;
1084 struct bigmac *bp;
1085 u8 bsizes, bsizes_more;
1086 int i;
1087
1088 /* Get a new device struct for this interface. */
1089 dev = alloc_etherdev(sizeof(struct bigmac));
1090 if (!dev)
1091 return -ENOMEM;
1092 SET_MODULE_OWNER(dev);
1093
1094 if (version_printed++ == 0)
1095 printk(KERN_INFO "%s", version);
1096
1097 dev->base_addr = (long) qec_sdev;
1098 for (i = 0; i < 6; i++)
1099 dev->dev_addr[i] = idprom->id_ethaddr[i];
1100
1101 /* Setup softc, with backpointers to QEC and BigMAC SBUS device structs. */
1102 bp = dev->priv;
1103 bp->qec_sdev = qec_sdev;
1104 bp->bigmac_sdev = qec_sdev->child;
1105
1106 spin_lock_init(&bp->lock);
1107
1108 /* Verify the registers we expect, are actually there. */
1109 if ((bp->bigmac_sdev->num_registers != 3) ||
1110 (bp->qec_sdev->num_registers != 2)) {
1111 printk(KERN_ERR "BIGMAC: Device does not have 2 and 3 regs, it has %d and %d.\n",
1112 bp->qec_sdev->num_registers,
1113 bp->bigmac_sdev->num_registers);
1114 printk(KERN_ERR "BIGMAC: Would you like that for here or to go?\n");
1115 goto fail_and_cleanup;
1116 }
1117
1118 /* Map in QEC global control registers. */
1119 bp->gregs = sbus_ioremap(&bp->qec_sdev->resource[0], 0,
1120 GLOB_REG_SIZE, "BigMAC QEC GLobal Regs");
1121 if (!bp->gregs) {
1122 printk(KERN_ERR "BIGMAC: Cannot map QEC global registers.\n");
1123 goto fail_and_cleanup;
1124 }
1125
1126 /* Make sure QEC is in BigMAC mode. */
1127 if ((sbus_readl(bp->gregs + GLOB_CTRL) & 0xf0000000) != GLOB_CTRL_BMODE) {
1128 printk(KERN_ERR "BigMAC: AIEEE, QEC is not in BigMAC mode!\n");
1129 goto fail_and_cleanup;
1130 }
1131
1132 /* Reset the QEC. */
1133 if (qec_global_reset(bp->gregs))
1134 goto fail_and_cleanup;
1135
1136 /* Get supported SBUS burst sizes. */
1137 bsizes = prom_getintdefault(bp->qec_sdev->prom_node,
1138 "burst-sizes",
1139 0xff);
1140
1141 bsizes_more = prom_getintdefault(bp->qec_sdev->bus->prom_node,
1142 "burst-sizes",
1143 0xff);
1144
1145 bsizes &= 0xff;
1146 if (bsizes_more != 0xff)
1147 bsizes &= bsizes_more;
1148 if (bsizes == 0xff || (bsizes & DMA_BURST16) == 0 ||
1149 (bsizes & DMA_BURST32) == 0)
1150 bsizes = (DMA_BURST32 - 1);
1151 bp->bigmac_bursts = bsizes;
1152
1153 /* Perform QEC initialization. */
1154 qec_init(bp);
1155
1156 /* Map in the BigMAC channel registers. */
1157 bp->creg = sbus_ioremap(&bp->bigmac_sdev->resource[0], 0,
1158 CREG_REG_SIZE, "BigMAC QEC Channel Regs");
1159 if (!bp->creg) {
1160 printk(KERN_ERR "BIGMAC: Cannot map QEC channel registers.\n");
1161 goto fail_and_cleanup;
1162 }
1163
1164 /* Map in the BigMAC control registers. */
1165 bp->bregs = sbus_ioremap(&bp->bigmac_sdev->resource[1], 0,
1166 BMAC_REG_SIZE, "BigMAC Primary Regs");
1167 if (!bp->bregs) {
1168 printk(KERN_ERR "BIGMAC: Cannot map BigMAC primary registers.\n");
1169 goto fail_and_cleanup;
1170 }
1171
1172 /* Map in the BigMAC transceiver registers, this is how you poke at
1173 * the BigMAC's PHY.
1174 */
1175 bp->tregs = sbus_ioremap(&bp->bigmac_sdev->resource[2], 0,
1176 TCVR_REG_SIZE, "BigMAC Transceiver Regs");
1177 if (!bp->tregs) {
1178 printk(KERN_ERR "BIGMAC: Cannot map BigMAC transceiver registers.\n");
1179 goto fail_and_cleanup;
1180 }
1181
1182 /* Stop the BigMAC. */
1183 bigmac_stop(bp);
1184
1185 /* Allocate transmit/receive descriptor DVMA block. */
1186 bp->bmac_block = sbus_alloc_consistent(bp->bigmac_sdev,
1187 PAGE_SIZE,
1188 &bp->bblock_dvma);
1189 if (bp->bmac_block == NULL || bp->bblock_dvma == 0) {
1190 printk(KERN_ERR "BIGMAC: Cannot allocate consistent DMA.\n");
1191 goto fail_and_cleanup;
1192 }
1193
1194 /* Get the board revision of this BigMAC. */
1195 bp->board_rev = prom_getintdefault(bp->bigmac_sdev->prom_node,
1196 "board-version", 1);
1197
1198 /* Init auto-negotiation timer state. */
1199 init_timer(&bp->bigmac_timer);
1200 bp->timer_state = asleep;
1201 bp->timer_ticks = 0;
1202
1203 /* Backlink to generic net device struct. */
1204 bp->dev = dev;
1205
1206 /* Set links to our BigMAC open and close routines. */
1207 dev->open = &bigmac_open;
1208 dev->stop = &bigmac_close;
1209 dev->hard_start_xmit = &bigmac_start_xmit;
1210 dev->ethtool_ops = &bigmac_ethtool_ops;
1211
1212 /* Set links to BigMAC statistic and multi-cast loading code. */
1213 dev->get_stats = &bigmac_get_stats;
1214 dev->set_multicast_list = &bigmac_set_multicast;
1215
1216 dev->tx_timeout = &bigmac_tx_timeout;
1217 dev->watchdog_timeo = 5*HZ;
1218
1219 /* Finish net device registration. */
1220 dev->irq = bp->bigmac_sdev->irqs[0];
1221 dev->dma = 0;
1222
1223 if (register_netdev(dev)) {
1224 printk(KERN_ERR "BIGMAC: Cannot register device.\n");
1225 goto fail_and_cleanup;
1226 }
1227
1228 /* Put us into the list of instances attached for later driver
1229 * exit.
1230 */
1231 bp->next_module = root_bigmac_dev;
1232 root_bigmac_dev = bp;
1233
1234 printk(KERN_INFO "%s: BigMAC 100baseT Ethernet ", dev->name);
1235 for (i = 0; i < 6; i++)
1236 printk("%2.2x%c", dev->dev_addr[i],
1237 i == 5 ? ' ' : ':');
1238 printk("\n");
1239
1240 return 0;
1241
1242 fail_and_cleanup:
1243 /* Something went wrong, undo whatever we did so far. */
1244 /* Free register mappings if any. */
1245 if (bp->gregs)
1246 sbus_iounmap(bp->gregs, GLOB_REG_SIZE);
1247 if (bp->creg)
1248 sbus_iounmap(bp->creg, CREG_REG_SIZE);
1249 if (bp->bregs)
1250 sbus_iounmap(bp->bregs, BMAC_REG_SIZE);
1251 if (bp->tregs)
1252 sbus_iounmap(bp->tregs, TCVR_REG_SIZE);
1253
1254 if (bp->bmac_block)
1255 sbus_free_consistent(bp->bigmac_sdev,
1256 PAGE_SIZE,
1257 bp->bmac_block,
1258 bp->bblock_dvma);
1259
1260 /* This also frees the co-located 'dev->priv' */
1261 free_netdev(dev);
1262 return -ENODEV;
1263 }
1264
1265 /* QEC can be the parent of either QuadEthernet or
1266 * a BigMAC. We want the latter.
1267 */
1268 static int __init bigmac_match(struct sbus_dev *sdev)
1269 {
1270 struct sbus_dev *child = sdev->child;
1271
1272 if (strcmp(sdev->prom_name, "qec") != 0)
1273 return 0;
1274
1275 if (child == NULL)
1276 return 0;
1277
1278 if (strcmp(child->prom_name, "be") != 0)
1279 return 0;
1280
1281 return 1;
1282 }
1283
1284 static int __init bigmac_probe(void)
1285 {
1286 struct sbus_bus *sbus;
1287 struct sbus_dev *sdev = NULL;
1288 static int called;
1289 int cards = 0, v;
1290
1291 root_bigmac_dev = NULL;
1292
1293 if (called)
1294 return -ENODEV;
1295 called++;
1296
1297 for_each_sbus(sbus) {
1298 for_each_sbusdev(sdev, sbus) {
1299 if (bigmac_match(sdev)) {
1300 cards++;
1301 if ((v = bigmac_ether_init(sdev)))
1302 return v;
1303 }
1304 }
1305 }
1306 if (!cards)
1307 return -ENODEV;
1308 return 0;
1309 }
1310
1311 static void __exit bigmac_cleanup(void)
1312 {
1313 while (root_bigmac_dev) {
1314 struct bigmac *bp = root_bigmac_dev;
1315 struct bigmac *bp_nxt = root_bigmac_dev->next_module;
1316
1317 sbus_iounmap(bp->gregs, GLOB_REG_SIZE);
1318 sbus_iounmap(bp->creg, CREG_REG_SIZE);
1319 sbus_iounmap(bp->bregs, BMAC_REG_SIZE);
1320 sbus_iounmap(bp->tregs, TCVR_REG_SIZE);
1321 sbus_free_consistent(bp->bigmac_sdev,
1322 PAGE_SIZE,
1323 bp->bmac_block,
1324 bp->bblock_dvma);
1325
1326 unregister_netdev(bp->dev);
1327 free_netdev(bp->dev);
1328 root_bigmac_dev = bp_nxt;
1329 }
1330 }
1331
1332 module_init(bigmac_probe);
1333 module_exit(bigmac_cleanup);
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