?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Linux-2.6.12-rc2
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / sunbmac.c
blob025dcd867eaa7afe90127ccf56ee4a4a3993cae7
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 static char version[] __initdata =
41 "sunbmac.c:v2.0 24/Nov/03 David S. Miller (davem@redhat.com)\n";
42
43 #undef DEBUG_PROBE
44 #undef DEBUG_TX
45 #undef DEBUG_IRQ
46
47 #ifdef DEBUG_PROBE
48 #define DP(x) printk x
49 #else
50 #define DP(x)
51 #endif
52
53 #ifdef DEBUG_TX
54 #define DTX(x) printk x
55 #else
56 #define DTX(x)
57 #endif
58
59 #ifdef DEBUG_IRQ
60 #define DIRQ(x) printk x
61 #else
62 #define DIRQ(x)
63 #endif
64
65 static struct bigmac *root_bigmac_dev;
66
67 #define DEFAULT_JAMSIZE 4 /* Toe jam */
68
69 #define QEC_RESET_TRIES 200
70
71 static int qec_global_reset(void __iomem *gregs)
72 {
73 int tries = QEC_RESET_TRIES;
74
75 sbus_writel(GLOB_CTRL_RESET, gregs + GLOB_CTRL);
76 while (--tries) {
77 if (sbus_readl(gregs + GLOB_CTRL) & GLOB_CTRL_RESET) {
78 udelay(20);
79 continue;
80 }
81 break;
82 }
83 if (tries)
84 return 0;
85 printk(KERN_ERR "BigMAC: Cannot reset the QEC.\n");
86 return -1;
87 }
88
89 static void qec_init(struct bigmac *bp)
90 {
91 void __iomem *gregs = bp->gregs;
92 struct sbus_dev *qec_sdev = bp->qec_sdev;
93 u8 bsizes = bp->bigmac_bursts;
94 u32 regval;
95
96 /* 64byte bursts do not work at the moment, do
97 * not even try to enable them. -DaveM
98 */
99 if (bsizes & DMA_BURST32)
100 regval = GLOB_CTRL_B32;
101 else
102 regval = GLOB_CTRL_B16;
103 sbus_writel(regval | GLOB_CTRL_BMODE, gregs + GLOB_CTRL);
104 sbus_writel(GLOB_PSIZE_2048, gregs + GLOB_PSIZE);
105
106 /* All of memsize is given to bigmac. */
107 sbus_writel(qec_sdev->reg_addrs[1].reg_size,
108 gregs + GLOB_MSIZE);
109
110 /* Half to the transmitter, half to the receiver. */
111 sbus_writel(qec_sdev->reg_addrs[1].reg_size >> 1,
112 gregs + GLOB_TSIZE);
113 sbus_writel(qec_sdev->reg_addrs[1].reg_size >> 1,
114 gregs + GLOB_RSIZE);
115 }
116
117 #define TX_RESET_TRIES 32
118 #define RX_RESET_TRIES 32
119
120 static void bigmac_tx_reset(void __iomem *bregs)
121 {
122 int tries = TX_RESET_TRIES;
123
124 sbus_writel(0, bregs + BMAC_TXCFG);
125
126 /* The fifo threshold bit is read-only and does
127 * not clear. -DaveM
128 */
129 while ((sbus_readl(bregs + BMAC_TXCFG) & ~(BIGMAC_TXCFG_FIFO)) != 0 &&
130 --tries != 0)
131 udelay(20);
132
133 if (!tries) {
134 printk(KERN_ERR "BIGMAC: Transmitter will not reset.\n");
135 printk(KERN_ERR "BIGMAC: tx_cfg is %08x\n",
136 sbus_readl(bregs + BMAC_TXCFG));
137 }
138 }
139
140 static void bigmac_rx_reset(void __iomem *bregs)
141 {
142 int tries = RX_RESET_TRIES;
143
144 sbus_writel(0, bregs + BMAC_RXCFG);
145 while (sbus_readl(bregs + BMAC_RXCFG) && --tries)
146 udelay(20);
147
148 if (!tries) {
149 printk(KERN_ERR "BIGMAC: Receiver will not reset.\n");
150 printk(KERN_ERR "BIGMAC: rx_cfg is %08x\n",
151 sbus_readl(bregs + BMAC_RXCFG));
152 }
153 }
154
155 /* Reset the transmitter and receiver. */
156 static void bigmac_stop(struct bigmac *bp)
157 {
158 bigmac_tx_reset(bp->bregs);
159 bigmac_rx_reset(bp->bregs);
160 }
161
162 static void bigmac_get_counters(struct bigmac *bp, void __iomem *bregs)
163 {
164 struct net_device_stats *stats = &bp->enet_stats;
165
166 stats->rx_crc_errors += sbus_readl(bregs + BMAC_RCRCECTR);
167 sbus_writel(0, bregs + BMAC_RCRCECTR);
168
169 stats->rx_frame_errors += sbus_readl(bregs + BMAC_UNALECTR);
170 sbus_writel(0, bregs + BMAC_UNALECTR);
171
172 stats->rx_length_errors += sbus_readl(bregs + BMAC_GLECTR);
173 sbus_writel(0, bregs + BMAC_GLECTR);
174
175 stats->tx_aborted_errors += sbus_readl(bregs + BMAC_EXCTR);
176
177 stats->collisions +=
178 (sbus_readl(bregs + BMAC_EXCTR) +
179 sbus_readl(bregs + BMAC_LTCTR));
180 sbus_writel(0, bregs + BMAC_EXCTR);
181 sbus_writel(0, bregs + BMAC_LTCTR);
182 }
183
184 static void bigmac_clean_rings(struct bigmac *bp)
185 {
186 int i;
187
188 for (i = 0; i < RX_RING_SIZE; i++) {
189 if (bp->rx_skbs[i] != NULL) {
190 dev_kfree_skb_any(bp->rx_skbs[i]);
191 bp->rx_skbs[i] = NULL;
192 }
193 }
194
195 for (i = 0; i < TX_RING_SIZE; i++) {
196 if (bp->tx_skbs[i] != NULL) {
197 dev_kfree_skb_any(bp->tx_skbs[i]);
198 bp->tx_skbs[i] = NULL;
199 }
200 }
201 }
202
203 static void bigmac_init_rings(struct bigmac *bp, int from_irq)
204 {
205 struct bmac_init_block *bb = bp->bmac_block;
206 struct net_device *dev = bp->dev;
207 int i, gfp_flags = GFP_KERNEL;
208
209 if (from_irq || in_interrupt())
210 gfp_flags = GFP_ATOMIC;
211
212 bp->rx_new = bp->rx_old = bp->tx_new = bp->tx_old = 0;
213
214 /* Free any skippy bufs left around in the rings. */
215 bigmac_clean_rings(bp);
216
217 /* Now get new skbufs for the receive ring. */
218 for (i = 0; i < RX_RING_SIZE; i++) {
219 struct sk_buff *skb;
220
221 skb = big_mac_alloc_skb(RX_BUF_ALLOC_SIZE, gfp_flags);
222 if (!skb)
223 continue;
224
225 bp->rx_skbs[i] = skb;
226 skb->dev = dev;
227
228 /* Because we reserve afterwards. */
229 skb_put(skb, ETH_FRAME_LEN);
230 skb_reserve(skb, 34);
231
232 bb->be_rxd[i].rx_addr =
233 sbus_map_single(bp->bigmac_sdev, skb->data,
234 RX_BUF_ALLOC_SIZE - 34,
235 SBUS_DMA_FROMDEVICE);
236 bb->be_rxd[i].rx_flags =
237 (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
238 }
239
240 for (i = 0; i < TX_RING_SIZE; i++)
241 bb->be_txd[i].tx_flags = bb->be_txd[i].tx_addr = 0;
242 }
243
244 #define MGMT_CLKON (MGMT_PAL_INT_MDIO|MGMT_PAL_EXT_MDIO|MGMT_PAL_OENAB|MGMT_PAL_DCLOCK)
245 #define MGMT_CLKOFF (MGMT_PAL_INT_MDIO|MGMT_PAL_EXT_MDIO|MGMT_PAL_OENAB)
246
247 static void idle_transceiver(void __iomem *tregs)
248 {
249 int i = 20;
250
251 while (i--) {
252 sbus_writel(MGMT_CLKOFF, tregs + TCVR_MPAL);
253 sbus_readl(tregs + TCVR_MPAL);
254 sbus_writel(MGMT_CLKON, tregs + TCVR_MPAL);
255 sbus_readl(tregs + TCVR_MPAL);
256 }
257 }
258
259 static void write_tcvr_bit(struct bigmac *bp, void __iomem *tregs, int bit)
260 {
261 if (bp->tcvr_type == internal) {
262 bit = (bit & 1) << 3;
263 sbus_writel(bit | (MGMT_PAL_OENAB | MGMT_PAL_EXT_MDIO),
264 tregs + TCVR_MPAL);
265 sbus_readl(tregs + TCVR_MPAL);
266 sbus_writel(bit | MGMT_PAL_OENAB | MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK,
267 tregs + TCVR_MPAL);
268 sbus_readl(tregs + TCVR_MPAL);
269 } else if (bp->tcvr_type == external) {
270 bit = (bit & 1) << 2;
271 sbus_writel(bit | MGMT_PAL_INT_MDIO | MGMT_PAL_OENAB,
272 tregs + TCVR_MPAL);
273 sbus_readl(tregs + TCVR_MPAL);
274 sbus_writel(bit | MGMT_PAL_INT_MDIO | MGMT_PAL_OENAB | MGMT_PAL_DCLOCK,
275 tregs + TCVR_MPAL);
276 sbus_readl(tregs + TCVR_MPAL);
277 } else {
278 printk(KERN_ERR "write_tcvr_bit: No transceiver type known!\n");
279 }
280 }
281
282 static int read_tcvr_bit(struct bigmac *bp, void __iomem *tregs)
283 {
284 int retval = 0;
285
286 if (bp->tcvr_type == internal) {
287 sbus_writel(MGMT_PAL_EXT_MDIO, tregs + TCVR_MPAL);
288 sbus_readl(tregs + TCVR_MPAL);
289 sbus_writel(MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK,
290 tregs + TCVR_MPAL);
291 sbus_readl(tregs + TCVR_MPAL);
292 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_INT_MDIO) >> 3;
293 } else if (bp->tcvr_type == external) {
294 sbus_writel(MGMT_PAL_INT_MDIO, tregs + TCVR_MPAL);
295 sbus_readl(tregs + TCVR_MPAL);
296 sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_DCLOCK, tregs + TCVR_MPAL);
297 sbus_readl(tregs + TCVR_MPAL);
298 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_EXT_MDIO) >> 2;
299 } else {
300 printk(KERN_ERR "read_tcvr_bit: No transceiver type known!\n");
301 }
302 return retval;
303 }
304
305 static int read_tcvr_bit2(struct bigmac *bp, void __iomem *tregs)
306 {
307 int retval = 0;
308
309 if (bp->tcvr_type == internal) {
310 sbus_writel(MGMT_PAL_EXT_MDIO, tregs + TCVR_MPAL);
311 sbus_readl(tregs + TCVR_MPAL);
312 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_INT_MDIO) >> 3;
313 sbus_writel(MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK, tregs + TCVR_MPAL);
314 sbus_readl(tregs + TCVR_MPAL);
315 } else if (bp->tcvr_type == external) {
316 sbus_writel(MGMT_PAL_INT_MDIO, tregs + TCVR_MPAL);
317 sbus_readl(tregs + TCVR_MPAL);
318 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_EXT_MDIO) >> 2;
319 sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_DCLOCK, tregs + TCVR_MPAL);
320 sbus_readl(tregs + TCVR_MPAL);
321 } else {
322 printk(KERN_ERR "read_tcvr_bit2: No transceiver type known!\n");
323 }
324 return retval;
325 }
326
327 static void put_tcvr_byte(struct bigmac *bp,
328 void __iomem *tregs,
329 unsigned int byte)
330 {
331 int shift = 4;
332
333 do {
334 write_tcvr_bit(bp, tregs, ((byte >> shift) & 1));
335 shift -= 1;
336 } while (shift >= 0);
337 }
338
339 static void bigmac_tcvr_write(struct bigmac *bp, void __iomem *tregs,
340 int reg, unsigned short val)
341 {
342 int shift;
343
344 reg &= 0xff;
345 val &= 0xffff;
346 switch(bp->tcvr_type) {
347 case internal:
348 case external:
349 break;
350
351 default:
352 printk(KERN_ERR "bigmac_tcvr_read: Whoops, no known transceiver type.\n");
353 return;
354 };
355
356 idle_transceiver(tregs);
357 write_tcvr_bit(bp, tregs, 0);
358 write_tcvr_bit(bp, tregs, 1);
359 write_tcvr_bit(bp, tregs, 0);
360 write_tcvr_bit(bp, tregs, 1);
361
362 put_tcvr_byte(bp, tregs,
363 ((bp->tcvr_type == internal) ?
364 BIGMAC_PHY_INTERNAL : BIGMAC_PHY_EXTERNAL));
365
366 put_tcvr_byte(bp, tregs, reg);
367
368 write_tcvr_bit(bp, tregs, 1);
369 write_tcvr_bit(bp, tregs, 0);
370
371 shift = 15;
372 do {
373 write_tcvr_bit(bp, tregs, (val >> shift) & 1);
374 shift -= 1;
375 } while (shift >= 0);
376 }
377
378 static unsigned short bigmac_tcvr_read(struct bigmac *bp,
379 void __iomem *tregs,
380 int reg)
381 {
382 unsigned short retval = 0;
383
384 reg &= 0xff;
385 switch(bp->tcvr_type) {
386 case internal:
387 case external:
388 break;
389
390 default:
391 printk(KERN_ERR "bigmac_tcvr_read: Whoops, no known transceiver type.\n");
392 return 0xffff;
393 };
394
395 idle_transceiver(tregs);
396 write_tcvr_bit(bp, tregs, 0);
397 write_tcvr_bit(bp, tregs, 1);
398 write_tcvr_bit(bp, tregs, 1);
399 write_tcvr_bit(bp, tregs, 0);
400
401 put_tcvr_byte(bp, tregs,
402 ((bp->tcvr_type == internal) ?
403 BIGMAC_PHY_INTERNAL : BIGMAC_PHY_EXTERNAL));
404
405 put_tcvr_byte(bp, tregs, reg);
406
407 if (bp->tcvr_type == external) {
408 int shift = 15;
409
410 (void) read_tcvr_bit2(bp, tregs);
411 (void) read_tcvr_bit2(bp, tregs);
412
413 do {
414 int tmp;
415
416 tmp = read_tcvr_bit2(bp, tregs);
417 retval |= ((tmp & 1) << shift);
418 shift -= 1;
419 } while (shift >= 0);
420
421 (void) read_tcvr_bit2(bp, tregs);
422 (void) read_tcvr_bit2(bp, tregs);
423 (void) read_tcvr_bit2(bp, tregs);
424 } else {
425 int shift = 15;
426
427 (void) read_tcvr_bit(bp, tregs);
428 (void) read_tcvr_bit(bp, tregs);
429
430 do {
431 int tmp;
432
433 tmp = read_tcvr_bit(bp, tregs);
434 retval |= ((tmp & 1) << shift);
435 shift -= 1;
436 } while (shift >= 0);
437
438 (void) read_tcvr_bit(bp, tregs);
439 (void) read_tcvr_bit(bp, tregs);
440 (void) read_tcvr_bit(bp, tregs);
441 }
442 return retval;
443 }
444
445 static void bigmac_tcvr_init(struct bigmac *bp)
446 {
447 void __iomem *tregs = bp->tregs;
448 u32 mpal;
449
450 idle_transceiver(tregs);
451 sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK,
452 tregs + TCVR_MPAL);
453 sbus_readl(tregs + TCVR_MPAL);
454
455 /* Only the bit for the present transceiver (internal or
456 * external) will stick, set them both and see what stays.
457 */
458 sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_EXT_MDIO, tregs + TCVR_MPAL);
459 sbus_readl(tregs + TCVR_MPAL);
460 udelay(20);
461
462 mpal = sbus_readl(tregs + TCVR_MPAL);
463 if (mpal & MGMT_PAL_EXT_MDIO) {
464 bp->tcvr_type = external;
465 sbus_writel(~(TCVR_PAL_EXTLBACK | TCVR_PAL_MSENSE | TCVR_PAL_LTENABLE),
466 tregs + TCVR_TPAL);
467 sbus_readl(tregs + TCVR_TPAL);
468 } else if (mpal & MGMT_PAL_INT_MDIO) {
469 bp->tcvr_type = internal;
470 sbus_writel(~(TCVR_PAL_SERIAL | TCVR_PAL_EXTLBACK |
471 TCVR_PAL_MSENSE | TCVR_PAL_LTENABLE),
472 tregs + TCVR_TPAL);
473 sbus_readl(tregs + TCVR_TPAL);
474 } else {
475 printk(KERN_ERR "BIGMAC: AIEEE, neither internal nor "
476 "external MDIO available!\n");
477 printk(KERN_ERR "BIGMAC: mgmt_pal[%08x] tcvr_pal[%08x]\n",
478 sbus_readl(tregs + TCVR_MPAL),
479 sbus_readl(tregs + TCVR_TPAL));
480 }
481 }
482
483 static int bigmac_init(struct bigmac *, int);
484
485 static int try_next_permutation(struct bigmac *bp, void __iomem *tregs)
486 {
487 if (bp->sw_bmcr & BMCR_SPEED100) {
488 int timeout;
489
490 /* Reset the PHY. */
491 bp->sw_bmcr = (BMCR_ISOLATE | BMCR_PDOWN | BMCR_LOOPBACK);
492 bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
493 bp->sw_bmcr = (BMCR_RESET);
494 bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
495
496 timeout = 64;
497 while (--timeout) {
498 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
499 if ((bp->sw_bmcr & BMCR_RESET) == 0)
500 break;
501 udelay(20);
502 }
503 if (timeout == 0)
504 printk(KERN_ERR "%s: PHY reset failed.\n", bp->dev->name);
505
506 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
507
508 /* Now we try 10baseT. */
509 bp->sw_bmcr &= ~(BMCR_SPEED100);
510 bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
511 return 0;
512 }
513
514 /* We've tried them all. */
515 return -1;
516 }
517
518 static void bigmac_timer(unsigned long data)
519 {
520 struct bigmac *bp = (struct bigmac *) data;
521 void __iomem *tregs = bp->tregs;
522 int restart_timer = 0;
523
524 bp->timer_ticks++;
525 if (bp->timer_state == ltrywait) {
526 bp->sw_bmsr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMSR);
527 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
528 if (bp->sw_bmsr & BMSR_LSTATUS) {
529 printk(KERN_INFO "%s: Link is now up at %s.\n",
530 bp->dev->name,
531 (bp->sw_bmcr & BMCR_SPEED100) ?
532 "100baseT" : "10baseT");
533 bp->timer_state = asleep;
534 restart_timer = 0;
535 } else {
536 if (bp->timer_ticks >= 4) {
537 int ret;
538
539 ret = try_next_permutation(bp, tregs);
540 if (ret == -1) {
541 printk(KERN_ERR "%s: Link down, cable problem?\n",
542 bp->dev->name);
543 ret = bigmac_init(bp, 0);
544 if (ret) {
545 printk(KERN_ERR "%s: Error, cannot re-init the "
546 "BigMAC.\n", bp->dev->name);
547 }
548 return;
549 }
550 bp->timer_ticks = 0;
551 restart_timer = 1;
552 } else {
553 restart_timer = 1;
554 }
555 }
556 } else {
557 /* Can't happens.... */
558 printk(KERN_ERR "%s: Aieee, link timer is asleep but we got one anyways!\n",
559 bp->dev->name);
560 restart_timer = 0;
561 bp->timer_ticks = 0;
562 bp->timer_state = asleep; /* foo on you */
563 }
564
565 if (restart_timer != 0) {
566 bp->bigmac_timer.expires = jiffies + ((12 * HZ)/10); /* 1.2 sec. */
567 add_timer(&bp->bigmac_timer);
568 }
569 }
570
571 /* Well, really we just force the chip into 100baseT then
572 * 10baseT, each time checking for a link status.
573 */
574 static void bigmac_begin_auto_negotiation(struct bigmac *bp)
575 {
576 void __iomem *tregs = bp->tregs;
577 int timeout;
578
579 /* Grab new software copies of PHY registers. */
580 bp->sw_bmsr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMSR);
581 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
582
583 /* Reset the PHY. */
584 bp->sw_bmcr = (BMCR_ISOLATE | BMCR_PDOWN | BMCR_LOOPBACK);
585 bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
586 bp->sw_bmcr = (BMCR_RESET);
587 bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
588
589 timeout = 64;
590 while (--timeout) {
591 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
592 if ((bp->sw_bmcr & BMCR_RESET) == 0)
593 break;
594 udelay(20);
595 }
596 if (timeout == 0)
597 printk(KERN_ERR "%s: PHY reset failed.\n", bp->dev->name);
598
599 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
600
601 /* First we try 100baseT. */
602 bp->sw_bmcr |= BMCR_SPEED100;
603 bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
604
605 bp->timer_state = ltrywait;
606 bp->timer_ticks = 0;
607 bp->bigmac_timer.expires = jiffies + (12 * HZ) / 10;
608 bp->bigmac_timer.data = (unsigned long) bp;
609 bp->bigmac_timer.function = &bigmac_timer;
610 add_timer(&bp->bigmac_timer);
611 }
612
613 static int bigmac_init(struct bigmac *bp, int from_irq)
614 {
615 void __iomem *gregs = bp->gregs;
616 void __iomem *cregs = bp->creg;
617 void __iomem *bregs = bp->bregs;
618 unsigned char *e = &bp->dev->dev_addr[0];
619
620 /* Latch current counters into statistics. */
621 bigmac_get_counters(bp, bregs);
622
623 /* Reset QEC. */
624 qec_global_reset(gregs);
625
626 /* Init QEC. */
627 qec_init(bp);
628
629 /* Alloc and reset the tx/rx descriptor chains. */
630 bigmac_init_rings(bp, from_irq);
631
632 /* Initialize the PHY. */
633 bigmac_tcvr_init(bp);
634
635 /* Stop transmitter and receiver. */
636 bigmac_stop(bp);
637
638 /* Set hardware ethernet address. */
639 sbus_writel(((e[4] << 8) | e[5]), bregs + BMAC_MACADDR2);
640 sbus_writel(((e[2] << 8) | e[3]), bregs + BMAC_MACADDR1);
641 sbus_writel(((e[0] << 8) | e[1]), bregs + BMAC_MACADDR0);
642
643 /* Clear the hash table until mc upload occurs. */
644 sbus_writel(0, bregs + BMAC_HTABLE3);
645 sbus_writel(0, bregs + BMAC_HTABLE2);
646 sbus_writel(0, bregs + BMAC_HTABLE1);
647 sbus_writel(0, bregs + BMAC_HTABLE0);
648
649 /* Enable Big Mac hash table filter. */
650 sbus_writel(BIGMAC_RXCFG_HENABLE | BIGMAC_RXCFG_FIFO,
651 bregs + BMAC_RXCFG);
652 udelay(20);
653
654 /* Ok, configure the Big Mac transmitter. */
655 sbus_writel(BIGMAC_TXCFG_FIFO, bregs + BMAC_TXCFG);
656
657 /* The HME docs recommend to use the 10LSB of our MAC here. */
658 sbus_writel(((e[5] | e[4] << 8) & 0x3ff),
659 bregs + BMAC_RSEED);
660
661 /* Enable the output drivers no matter what. */
662 sbus_writel(BIGMAC_XCFG_ODENABLE | BIGMAC_XCFG_RESV,
663 bregs + BMAC_XIFCFG);
664
665 /* Tell the QEC where the ring descriptors are. */
666 sbus_writel(bp->bblock_dvma + bib_offset(be_rxd, 0),
667 cregs + CREG_RXDS);
668 sbus_writel(bp->bblock_dvma + bib_offset(be_txd, 0),
669 cregs + CREG_TXDS);
670
671 /* Setup the FIFO pointers into QEC local memory. */
672 sbus_writel(0, cregs + CREG_RXRBUFPTR);
673 sbus_writel(0, cregs + CREG_RXWBUFPTR);
674 sbus_writel(sbus_readl(gregs + GLOB_RSIZE),
675 cregs + CREG_TXRBUFPTR);
676 sbus_writel(sbus_readl(gregs + GLOB_RSIZE),
677 cregs + CREG_TXWBUFPTR);
678
679 /* Tell bigmac what interrupts we don't want to hear about. */
680 sbus_writel(BIGMAC_IMASK_GOTFRAME | BIGMAC_IMASK_SENTFRAME,
681 bregs + BMAC_IMASK);
682
683 /* Enable the various other irq's. */
684 sbus_writel(0, cregs + CREG_RIMASK);
685 sbus_writel(0, cregs + CREG_TIMASK);
686 sbus_writel(0, cregs + CREG_QMASK);
687 sbus_writel(0, cregs + CREG_BMASK);
688
689 /* Set jam size to a reasonable default. */
690 sbus_writel(DEFAULT_JAMSIZE, bregs + BMAC_JSIZE);
691
692 /* Clear collision counter. */
693 sbus_writel(0, cregs + CREG_CCNT);
694
695 /* Enable transmitter and receiver. */
696 sbus_writel(sbus_readl(bregs + BMAC_TXCFG) | BIGMAC_TXCFG_ENABLE,
697 bregs + BMAC_TXCFG);
698 sbus_writel(sbus_readl(bregs + BMAC_RXCFG) | BIGMAC_RXCFG_ENABLE,
699 bregs + BMAC_RXCFG);
700
701 /* Ok, start detecting link speed/duplex. */
702 bigmac_begin_auto_negotiation(bp);
703
704 /* Success. */
705 return 0;
706 }
707
708 /* Error interrupts get sent here. */
709 static void bigmac_is_medium_rare(struct bigmac *bp, u32 qec_status, u32 bmac_status)
710 {
711 printk(KERN_ERR "bigmac_is_medium_rare: ");
712 if (qec_status & (GLOB_STAT_ER | GLOB_STAT_BM)) {
713 if (qec_status & GLOB_STAT_ER)
714 printk("QEC_ERROR, ");
715 if (qec_status & GLOB_STAT_BM)
716 printk("QEC_BMAC_ERROR, ");
717 }
718 if (bmac_status & CREG_STAT_ERRORS) {
719 if (bmac_status & CREG_STAT_BERROR)
720 printk("BMAC_ERROR, ");
721 if (bmac_status & CREG_STAT_TXDERROR)
722 printk("TXD_ERROR, ");
723 if (bmac_status & CREG_STAT_TXLERR)
724 printk("TX_LATE_ERROR, ");
725 if (bmac_status & CREG_STAT_TXPERR)
726 printk("TX_PARITY_ERROR, ");
727 if (bmac_status & CREG_STAT_TXSERR)
728 printk("TX_SBUS_ERROR, ");
729
730 if (bmac_status & CREG_STAT_RXDROP)
731 printk("RX_DROP_ERROR, ");
732
733 if (bmac_status & CREG_STAT_RXSMALL)
734 printk("RX_SMALL_ERROR, ");
735 if (bmac_status & CREG_STAT_RXLERR)
736 printk("RX_LATE_ERROR, ");
737 if (bmac_status & CREG_STAT_RXPERR)
738 printk("RX_PARITY_ERROR, ");
739 if (bmac_status & CREG_STAT_RXSERR)
740 printk("RX_SBUS_ERROR, ");
741 }
742
743 printk(" RESET\n");
744 bigmac_init(bp, 1);
745 }
746
747 /* BigMAC transmit complete service routines. */
748 static void bigmac_tx(struct bigmac *bp)
749 {
750 struct be_txd *txbase = &bp->bmac_block->be_txd[0];
751 struct net_device *dev = bp->dev;
752 int elem;
753
754 spin_lock(&bp->lock);
755
756 elem = bp->tx_old;
757 DTX(("bigmac_tx: tx_old[%d] ", elem));
758 while (elem != bp->tx_new) {
759 struct sk_buff *skb;
760 struct be_txd *this = &txbase[elem];
761
762 DTX(("this(%p) [flags(%08x)addr(%08x)]",
763 this, this->tx_flags, this->tx_addr));
764
765 if (this->tx_flags & TXD_OWN)
766 break;
767 skb = bp->tx_skbs[elem];
768 bp->enet_stats.tx_packets++;
769 bp->enet_stats.tx_bytes += skb->len;
770 sbus_unmap_single(bp->bigmac_sdev,
771 this->tx_addr, skb->len,
772 SBUS_DMA_TODEVICE);
773
774 DTX(("skb(%p) ", skb));
775 bp->tx_skbs[elem] = NULL;
776 dev_kfree_skb_irq(skb);
777
778 elem = NEXT_TX(elem);
779 }
780 DTX((" DONE, tx_old=%d\n", elem));
781 bp->tx_old = elem;
782
783 if (netif_queue_stopped(dev) &&
784 TX_BUFFS_AVAIL(bp) > 0)
785 netif_wake_queue(bp->dev);
786
787 spin_unlock(&bp->lock);
788 }
789
790 /* BigMAC receive complete service routines. */
791 static void bigmac_rx(struct bigmac *bp)
792 {
793 struct be_rxd *rxbase = &bp->bmac_block->be_rxd[0];
794 struct be_rxd *this;
795 int elem = bp->rx_new, drops = 0;
796 u32 flags;
797
798 this = &rxbase[elem];
799 while (!((flags = this->rx_flags) & RXD_OWN)) {
800 struct sk_buff *skb;
801 int len = (flags & RXD_LENGTH); /* FCS not included */
802
803 /* Check for errors. */
804 if (len < ETH_ZLEN) {
805 bp->enet_stats.rx_errors++;
806 bp->enet_stats.rx_length_errors++;
807
808 drop_it:
809 /* Return it to the BigMAC. */
810 bp->enet_stats.rx_dropped++;
811 this->rx_flags =
812 (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
813 goto next;
814 }
815 skb = bp->rx_skbs[elem];
816 if (len > RX_COPY_THRESHOLD) {
817 struct sk_buff *new_skb;
818
819 /* Now refill the entry, if we can. */
820 new_skb = big_mac_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
821 if (new_skb == NULL) {
822 drops++;
823 goto drop_it;
824 }
825 sbus_unmap_single(bp->bigmac_sdev,
826 this->rx_addr,
827 RX_BUF_ALLOC_SIZE - 34,
828 SBUS_DMA_FROMDEVICE);
829 bp->rx_skbs[elem] = new_skb;
830 new_skb->dev = bp->dev;
831 skb_put(new_skb, ETH_FRAME_LEN);
832 skb_reserve(new_skb, 34);
833 this->rx_addr = sbus_map_single(bp->bigmac_sdev,
834 new_skb->data,
835 RX_BUF_ALLOC_SIZE - 34,
836 SBUS_DMA_FROMDEVICE);
837 this->rx_flags =
838 (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
839
840 /* Trim the original skb for the netif. */
841 skb_trim(skb, len);
842 } else {
843 struct sk_buff *copy_skb = dev_alloc_skb(len + 2);
844
845 if (copy_skb == NULL) {
846 drops++;
847 goto drop_it;
848 }
849 copy_skb->dev = bp->dev;
850 skb_reserve(copy_skb, 2);
851 skb_put(copy_skb, len);
852 sbus_dma_sync_single_for_cpu(bp->bigmac_sdev,
853 this->rx_addr, len,
854 SBUS_DMA_FROMDEVICE);
855 eth_copy_and_sum(copy_skb, (unsigned char *)skb->data, len, 0);
856 sbus_dma_sync_single_for_device(bp->bigmac_sdev,
857 this->rx_addr, len,
858 SBUS_DMA_FROMDEVICE);
859
860 /* Reuse original ring buffer. */
861 this->rx_flags =
862 (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
863
864 skb = copy_skb;
865 }
866
867 /* No checksums done by the BigMAC ;-( */
868 skb->protocol = eth_type_trans(skb, bp->dev);
869 netif_rx(skb);
870 bp->dev->last_rx = jiffies;
871 bp->enet_stats.rx_packets++;
872 bp->enet_stats.rx_bytes += len;
873 next:
874 elem = NEXT_RX(elem);
875 this = &rxbase[elem];
876 }
877 bp->rx_new = elem;
878 if (drops)
879 printk(KERN_NOTICE "%s: Memory squeeze, deferring packet.\n", bp->dev->name);
880 }
881
882 static irqreturn_t bigmac_interrupt(int irq, void *dev_id, struct pt_regs *regs)
883 {
884 struct bigmac *bp = (struct bigmac *) dev_id;
885 u32 qec_status, bmac_status;
886
887 DIRQ(("bigmac_interrupt: "));
888
889 /* Latch status registers now. */
890 bmac_status = sbus_readl(bp->creg + CREG_STAT);
891 qec_status = sbus_readl(bp->gregs + GLOB_STAT);
892
893 DIRQ(("qec_status=%08x bmac_status=%08x\n", qec_status, bmac_status));
894 if ((qec_status & (GLOB_STAT_ER | GLOB_STAT_BM)) ||
895 (bmac_status & CREG_STAT_ERRORS))
896 bigmac_is_medium_rare(bp, qec_status, bmac_status);
897
898 if (bmac_status & CREG_STAT_TXIRQ)
899 bigmac_tx(bp);
900
901 if (bmac_status & CREG_STAT_RXIRQ)
902 bigmac_rx(bp);
903
904 return IRQ_HANDLED;
905 }
906
907 static int bigmac_open(struct net_device *dev)
908 {
909 struct bigmac *bp = (struct bigmac *) dev->priv;
910 int ret;
911
912 ret = request_irq(dev->irq, &bigmac_interrupt, SA_SHIRQ, dev->name, bp);
913 if (ret) {
914 printk(KERN_ERR "BIGMAC: Can't order irq %d to go.\n", dev->irq);
915 return ret;
916 }
917 init_timer(&bp->bigmac_timer);
918 ret = bigmac_init(bp, 0);
919 if (ret)
920 free_irq(dev->irq, bp);
921 return ret;
922 }
923
924 static int bigmac_close(struct net_device *dev)
925 {
926 struct bigmac *bp = (struct bigmac *) dev->priv;
927
928 del_timer(&bp->bigmac_timer);
929 bp->timer_state = asleep;
930 bp->timer_ticks = 0;
931
932 bigmac_stop(bp);
933 bigmac_clean_rings(bp);
934 free_irq(dev->irq, bp);
935 return 0;
936 }
937
938 static void bigmac_tx_timeout(struct net_device *dev)
939 {
940 struct bigmac *bp = (struct bigmac *) dev->priv;
941
942 bigmac_init(bp, 0);
943 netif_wake_queue(dev);
944 }
945
946 /* Put a packet on the wire. */
947 static int bigmac_start_xmit(struct sk_buff *skb, struct net_device *dev)
948 {
949 struct bigmac *bp = (struct bigmac *) dev->priv;
950 int len, entry;
951 u32 mapping;
952
953 len = skb->len;
954 mapping = sbus_map_single(bp->bigmac_sdev, skb->data, len, SBUS_DMA_TODEVICE);
955
956 /* Avoid a race... */
957 spin_lock_irq(&bp->lock);
958 entry = bp->tx_new;
959 DTX(("bigmac_start_xmit: len(%d) entry(%d)\n", len, entry));
960 bp->bmac_block->be_txd[entry].tx_flags = TXD_UPDATE;
961 bp->tx_skbs[entry] = skb;
962 bp->bmac_block->be_txd[entry].tx_addr = mapping;
963 bp->bmac_block->be_txd[entry].tx_flags =
964 (TXD_OWN | TXD_SOP | TXD_EOP | (len & TXD_LENGTH));
965 bp->tx_new = NEXT_TX(entry);
966 if (TX_BUFFS_AVAIL(bp) <= 0)
967 netif_stop_queue(dev);
968 spin_unlock_irq(&bp->lock);
969
970 /* Get it going. */
971 sbus_writel(CREG_CTRL_TWAKEUP, bp->creg + CREG_CTRL);
972
973
974 dev->trans_start = jiffies;
975
976 return 0;
977 }
978
979 static struct net_device_stats *bigmac_get_stats(struct net_device *dev)
980 {
981 struct bigmac *bp = (struct bigmac *) dev->priv;
982
983 bigmac_get_counters(bp, bp->bregs);
984 return &bp->enet_stats;
985 }
986
987 static void bigmac_set_multicast(struct net_device *dev)
988 {
989 struct bigmac *bp = (struct bigmac *) dev->priv;
990 void __iomem *bregs = bp->bregs;
991 struct dev_mc_list *dmi = dev->mc_list;
992 char *addrs;
993 int i;
994 u32 tmp, crc;
995
996 /* Disable the receiver. The bit self-clears when
997 * the operation is complete.
998 */
999 tmp = sbus_readl(bregs + BMAC_RXCFG);
1000 tmp &= ~(BIGMAC_RXCFG_ENABLE);
1001 sbus_writel(tmp, bregs + BMAC_RXCFG);
1002 while ((sbus_readl(bregs + BMAC_RXCFG) & BIGMAC_RXCFG_ENABLE) != 0)
1003 udelay(20);
1004
1005 if ((dev->flags & IFF_ALLMULTI) || (dev->mc_count > 64)) {
1006 sbus_writel(0xffff, bregs + BMAC_HTABLE0);
1007 sbus_writel(0xffff, bregs + BMAC_HTABLE1);
1008 sbus_writel(0xffff, bregs + BMAC_HTABLE2);
1009 sbus_writel(0xffff, bregs + BMAC_HTABLE3);
1010 } else if (dev->flags & IFF_PROMISC) {
1011 tmp = sbus_readl(bregs + BMAC_RXCFG);
1012 tmp |= BIGMAC_RXCFG_PMISC;
1013 sbus_writel(tmp, bregs + BMAC_RXCFG);
1014 } else {
1015 u16 hash_table[4];
1016
1017 for (i = 0; i < 4; i++)
1018 hash_table[i] = 0;
1019
1020 for (i = 0; i < dev->mc_count; i++) {
1021 addrs = dmi->dmi_addr;
1022 dmi = dmi->next;
1023
1024 if (!(*addrs & 1))
1025 continue;
1026
1027 crc = ether_crc_le(6, addrs);
1028 crc >>= 26;
1029 hash_table[crc >> 4] |= 1 << (crc & 0xf);
1030 }
1031 sbus_writel(hash_table[0], bregs + BMAC_HTABLE0);
1032 sbus_writel(hash_table[1], bregs + BMAC_HTABLE1);
1033 sbus_writel(hash_table[2], bregs + BMAC_HTABLE2);
1034 sbus_writel(hash_table[3], bregs + BMAC_HTABLE3);
1035 }
1036
1037 /* Re-enable the receiver. */
1038 tmp = sbus_readl(bregs + BMAC_RXCFG);
1039 tmp |= BIGMAC_RXCFG_ENABLE;
1040 sbus_writel(tmp, bregs + BMAC_RXCFG);
1041 }
1042
1043 /* Ethtool support... */
1044 static void bigmac_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1045 {
1046 struct bigmac *bp = dev->priv;
1047
1048 strcpy(info->driver, "sunbmac");
1049 strcpy(info->version, "2.0");
1050 sprintf(info->bus_info, "SBUS:%d",
1051 bp->qec_sdev->slot);
1052 }
1053
1054 static u32 bigmac_get_link(struct net_device *dev)
1055 {
1056 struct bigmac *bp = dev->priv;
1057
1058 spin_lock_irq(&bp->lock);
1059 bp->sw_bmsr = bigmac_tcvr_read(bp, bp->tregs, BIGMAC_BMSR);
1060 spin_unlock_irq(&bp->lock);
1061
1062 return (bp->sw_bmsr & BMSR_LSTATUS);
1063 }
1064
1065 static struct ethtool_ops bigmac_ethtool_ops = {
1066 .get_drvinfo = bigmac_get_drvinfo,
1067 .get_link = bigmac_get_link,
1068 };
1069
1070 static int __init bigmac_ether_init(struct sbus_dev *qec_sdev)
1071 {
1072 struct net_device *dev;
1073 static int version_printed;
1074 struct bigmac *bp;
1075 u8 bsizes, bsizes_more;
1076 int i;
1077
1078 /* Get a new device struct for this interface. */
1079 dev = alloc_etherdev(sizeof(struct bigmac));
1080 if (!dev)
1081 return -ENOMEM;
1082 SET_MODULE_OWNER(dev);
1083
1084 if (version_printed++ == 0)
1085 printk(KERN_INFO "%s", version);
1086
1087 dev->base_addr = (long) qec_sdev;
1088 for (i = 0; i < 6; i++)
1089 dev->dev_addr[i] = idprom->id_ethaddr[i];
1090
1091 /* Setup softc, with backpointers to QEC and BigMAC SBUS device structs. */
1092 bp = dev->priv;
1093 bp->qec_sdev = qec_sdev;
1094 bp->bigmac_sdev = qec_sdev->child;
1095
1096 spin_lock_init(&bp->lock);
1097
1098 /* Verify the registers we expect, are actually there. */
1099 if ((bp->bigmac_sdev->num_registers != 3) ||
1100 (bp->qec_sdev->num_registers != 2)) {
1101 printk(KERN_ERR "BIGMAC: Device does not have 2 and 3 regs, it has %d and %d.\n",
1102 bp->qec_sdev->num_registers,
1103 bp->bigmac_sdev->num_registers);
1104 printk(KERN_ERR "BIGMAC: Would you like that for here or to go?\n");
1105 goto fail_and_cleanup;
1106 }
1107
1108 /* Map in QEC global control registers. */
1109 bp->gregs = sbus_ioremap(&bp->qec_sdev->resource[0], 0,
1110 GLOB_REG_SIZE, "BigMAC QEC GLobal Regs");
1111 if (!bp->gregs) {
1112 printk(KERN_ERR "BIGMAC: Cannot map QEC global registers.\n");
1113 goto fail_and_cleanup;
1114 }
1115
1116 /* Make sure QEC is in BigMAC mode. */
1117 if ((sbus_readl(bp->gregs + GLOB_CTRL) & 0xf0000000) != GLOB_CTRL_BMODE) {
1118 printk(KERN_ERR "BigMAC: AIEEE, QEC is not in BigMAC mode!\n");
1119 goto fail_and_cleanup;
1120 }
1121
1122 /* Reset the QEC. */
1123 if (qec_global_reset(bp->gregs))
1124 goto fail_and_cleanup;
1125
1126 /* Get supported SBUS burst sizes. */
1127 bsizes = prom_getintdefault(bp->qec_sdev->prom_node,
1128 "burst-sizes",
1129 0xff);
1130
1131 bsizes_more = prom_getintdefault(bp->qec_sdev->bus->prom_node,
1132 "burst-sizes",
1133 0xff);
1134
1135 bsizes &= 0xff;
1136 if (bsizes_more != 0xff)
1137 bsizes &= bsizes_more;
1138 if (bsizes == 0xff || (bsizes & DMA_BURST16) == 0 ||
1139 (bsizes & DMA_BURST32) == 0)
1140 bsizes = (DMA_BURST32 - 1);
1141 bp->bigmac_bursts = bsizes;
1142
1143 /* Perform QEC initialization. */
1144 qec_init(bp);
1145
1146 /* Map in the BigMAC channel registers. */
1147 bp->creg = sbus_ioremap(&bp->bigmac_sdev->resource[0], 0,
1148 CREG_REG_SIZE, "BigMAC QEC Channel Regs");
1149 if (!bp->creg) {
1150 printk(KERN_ERR "BIGMAC: Cannot map QEC channel registers.\n");
1151 goto fail_and_cleanup;
1152 }
1153
1154 /* Map in the BigMAC control registers. */
1155 bp->bregs = sbus_ioremap(&bp->bigmac_sdev->resource[1], 0,
1156 BMAC_REG_SIZE, "BigMAC Primary Regs");
1157 if (!bp->bregs) {
1158 printk(KERN_ERR "BIGMAC: Cannot map BigMAC primary registers.\n");
1159 goto fail_and_cleanup;
1160 }
1161
1162 /* Map in the BigMAC transceiver registers, this is how you poke at
1163 * the BigMAC's PHY.
1164 */
1165 bp->tregs = sbus_ioremap(&bp->bigmac_sdev->resource[2], 0,
1166 TCVR_REG_SIZE, "BigMAC Transceiver Regs");
1167 if (!bp->tregs) {
1168 printk(KERN_ERR "BIGMAC: Cannot map BigMAC transceiver registers.\n");
1169 goto fail_and_cleanup;
1170 }
1171
1172 /* Stop the BigMAC. */
1173 bigmac_stop(bp);
1174
1175 /* Allocate transmit/receive descriptor DVMA block. */
1176 bp->bmac_block = sbus_alloc_consistent(bp->bigmac_sdev,
1177 PAGE_SIZE,
1178 &bp->bblock_dvma);
1179 if (bp->bmac_block == NULL || bp->bblock_dvma == 0) {
1180 printk(KERN_ERR "BIGMAC: Cannot allocate consistent DMA.\n");
1181 goto fail_and_cleanup;
1182 }
1183
1184 /* Get the board revision of this BigMAC. */
1185 bp->board_rev = prom_getintdefault(bp->bigmac_sdev->prom_node,
1186 "board-version", 1);
1187
1188 /* Init auto-negotiation timer state. */
1189 init_timer(&bp->bigmac_timer);
1190 bp->timer_state = asleep;
1191 bp->timer_ticks = 0;
1192
1193 /* Backlink to generic net device struct. */
1194 bp->dev = dev;
1195
1196 /* Set links to our BigMAC open and close routines. */
1197 dev->open = &bigmac_open;
1198 dev->stop = &bigmac_close;
1199 dev->hard_start_xmit = &bigmac_start_xmit;
1200 dev->ethtool_ops = &bigmac_ethtool_ops;
1201
1202 /* Set links to BigMAC statistic and multi-cast loading code. */
1203 dev->get_stats = &bigmac_get_stats;
1204 dev->set_multicast_list = &bigmac_set_multicast;
1205
1206 dev->tx_timeout = &bigmac_tx_timeout;
1207 dev->watchdog_timeo = 5*HZ;
1208
1209 /* Finish net device registration. */
1210 dev->irq = bp->bigmac_sdev->irqs[0];
1211 dev->dma = 0;
1212
1213 if (register_netdev(dev)) {
1214 printk(KERN_ERR "BIGMAC: Cannot register device.\n");
1215 goto fail_and_cleanup;
1216 }
1217
1218 /* Put us into the list of instances attached for later driver
1219 * exit.
1220 */
1221 bp->next_module = root_bigmac_dev;
1222 root_bigmac_dev = bp;
1223
1224 printk(KERN_INFO "%s: BigMAC 100baseT Ethernet ", dev->name);
1225 for (i = 0; i < 6; i++)
1226 printk("%2.2x%c", dev->dev_addr[i],
1227 i == 5 ? ' ' : ':');
1228 printk("\n");
1229
1230 return 0;
1231
1232 fail_and_cleanup:
1233 /* Something went wrong, undo whatever we did so far. */
1234 /* Free register mappings if any. */
1235 if (bp->gregs)
1236 sbus_iounmap(bp->gregs, GLOB_REG_SIZE);
1237 if (bp->creg)
1238 sbus_iounmap(bp->creg, CREG_REG_SIZE);
1239 if (bp->bregs)
1240 sbus_iounmap(bp->bregs, BMAC_REG_SIZE);
1241 if (bp->tregs)
1242 sbus_iounmap(bp->tregs, TCVR_REG_SIZE);
1243
1244 if (bp->bmac_block)
1245 sbus_free_consistent(bp->bigmac_sdev,
1246 PAGE_SIZE,
1247 bp->bmac_block,
1248 bp->bblock_dvma);
1249
1250 /* This also frees the co-located 'dev->priv' */
1251 free_netdev(dev);
1252 return -ENODEV;
1253 }
1254
1255 /* QEC can be the parent of either QuadEthernet or
1256 * a BigMAC. We want the latter.
1257 */
1258 static int __init bigmac_match(struct sbus_dev *sdev)
1259 {
1260 struct sbus_dev *child = sdev->child;
1261
1262 if (strcmp(sdev->prom_name, "qec") != 0)
1263 return 0;
1264
1265 if (child == NULL)
1266 return 0;
1267
1268 if (strcmp(child->prom_name, "be") != 0)
1269 return 0;
1270
1271 return 1;
1272 }
1273
1274 static int __init bigmac_probe(void)
1275 {
1276 struct sbus_bus *sbus;
1277 struct sbus_dev *sdev = NULL;
1278 static int called;
1279 int cards = 0, v;
1280
1281 root_bigmac_dev = NULL;
1282
1283 if (called)
1284 return -ENODEV;
1285 called++;
1286
1287 for_each_sbus(sbus) {
1288 for_each_sbusdev(sdev, sbus) {
1289 if (bigmac_match(sdev)) {
1290 cards++;
1291 if ((v = bigmac_ether_init(sdev)))
1292 return v;
1293 }
1294 }
1295 }
1296 if (!cards)
1297 return -ENODEV;
1298 return 0;
1299 }
1300
1301 static void __exit bigmac_cleanup(void)
1302 {
1303 while (root_bigmac_dev) {
1304 struct bigmac *bp = root_bigmac_dev;
1305 struct bigmac *bp_nxt = root_bigmac_dev->next_module;
1306
1307 sbus_iounmap(bp->gregs, GLOB_REG_SIZE);
1308 sbus_iounmap(bp->creg, CREG_REG_SIZE);
1309 sbus_iounmap(bp->bregs, BMAC_REG_SIZE);
1310 sbus_iounmap(bp->tregs, TCVR_REG_SIZE);
1311 sbus_free_consistent(bp->bigmac_sdev,
1312 PAGE_SIZE,
1313 bp->bmac_block,
1314 bp->bblock_dvma);
1315
1316 unregister_netdev(bp->dev);
1317 free_netdev(bp->dev);
1318 root_bigmac_dev = bp_nxt;
1319 }
1320 }
1321
1322 module_init(bigmac_probe);
1323 module_exit(bigmac_cleanup);
1324 MODULE_LICENSE("GPL");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree