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