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Merge branch 'bkl/procfs' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic...
[linux-2.6-block.git] / drivers / net / sunbmac.c
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8ef2175c 1/* sunbmac.c: Driver for Sparc BigMAC 100baseT ethernet adapters.
1da177e4 2 *
8ef2175c 3 * Copyright (C) 1997, 1998, 1999, 2003, 2008 David S. Miller (davem@davemloft.net)
1da177e4
LT		 4 */
5
6#include <linux/module.h>
7
8#include <linux/kernel.h>
9#include <linux/types.h>
10#include <linux/fcntl.h>
11#include <linux/interrupt.h>
12#include <linux/ioport.h>
13#include <linux/in.h>
1da177e4
LT		 14#include <linux/string.h>
15#include <linux/delay.h>
16#include <linux/init.h>
17#include <linux/crc32.h>
18#include <linux/errno.h>
19#include <linux/ethtool.h>
20#include <linux/netdevice.h>
21#include <linux/etherdevice.h>
22#include <linux/skbuff.h>
23#include <linux/bitops.h>
738f2b7b 24#include <linux/dma-mapping.h>
8ef2175c
DM		 25#include <linux/of.h>
26#include <linux/of_device.h>
5a0e3ad6 27#include <linux/gfp.h>
1da177e4
LT		 28
29#include <asm/auxio.h>
30#include <asm/byteorder.h>
31#include <asm/dma.h>
32#include <asm/idprom.h>
33#include <asm/io.h>
34#include <asm/openprom.h>
35#include <asm/oplib.h>
36#include <asm/pgtable.h>
1da177e4
LT		 37#include <asm/system.h>
38
39#include "sunbmac.h"
40
10158286 41#define DRV_NAME "sunbmac"
8ef2175c
DM		 42#define DRV_VERSION "2.1"
43#define DRV_RELDATE "August 26, 2008"
44#define DRV_AUTHOR "David S. Miller (davem@davemloft.net)"
10158286 45
b48194bf 46static char version[] =
10158286
TC		 47 DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " " DRV_AUTHOR "\n";
48
49MODULE_VERSION(DRV_VERSION);
50MODULE_AUTHOR(DRV_AUTHOR);
51MODULE_DESCRIPTION("Sun BigMAC 100baseT ethernet driver");
52MODULE_LICENSE("GPL");
1da177e4
LT		 53
54#undef DEBUG_PROBE
55#undef DEBUG_TX
56#undef DEBUG_IRQ
57
58#ifdef DEBUG_PROBE
59#define DP(x) printk x
60#else
61#define DP(x)
62#endif
63
64#ifdef DEBUG_TX
65#define DTX(x) printk x
66#else
67#define DTX(x)
68#endif
69
70#ifdef DEBUG_IRQ
71#define DIRQ(x) printk x
72#else
73#define DIRQ(x)
74#endif
75
1da177e4
LT		 76#define DEFAULT_JAMSIZE 4 /* Toe jam */
77
78#define QEC_RESET_TRIES 200
79
80static int qec_global_reset(void __iomem *gregs)
81{
82 int tries = QEC_RESET_TRIES;
83
84 sbus_writel(GLOB_CTRL_RESET, gregs + GLOB_CTRL);
85 while (--tries) {
86 if (sbus_readl(gregs + GLOB_CTRL) & GLOB_CTRL_RESET) {
87 udelay(20);
88 continue;
89 }
90 break;
91 }
92 if (tries)
93 return 0;
94 printk(KERN_ERR "BigMAC: Cannot reset the QEC.\n");
95 return -1;
96}
97
98static void qec_init(struct bigmac *bp)
99{
8ef2175c 100 struct of_device *qec_op = bp->qec_op;
1da177e4 101 void __iomem *gregs = bp->gregs;
1da177e4
LT		 102 u8 bsizes = bp->bigmac_bursts;
103 u32 regval;
104
105 /* 64byte bursts do not work at the moment, do
106 * not even try to enable them. -DaveM
107 */
108 if (bsizes & DMA_BURST32)
109 regval = GLOB_CTRL_B32;
110 else
111 regval = GLOB_CTRL_B16;
112 sbus_writel(regval | GLOB_CTRL_BMODE, gregs + GLOB_CTRL);
113 sbus_writel(GLOB_PSIZE_2048, gregs + GLOB_PSIZE);
114
115 /* All of memsize is given to bigmac. */
8ef2175c 116 sbus_writel(resource_size(&qec_op->resource[1]),
1da177e4
LT		 117 gregs + GLOB_MSIZE);
118
119 /* Half to the transmitter, half to the receiver. */
8ef2175c 120 sbus_writel(resource_size(&qec_op->resource[1]) >> 1,
1da177e4 121 gregs + GLOB_TSIZE);
8ef2175c 122 sbus_writel(resource_size(&qec_op->resource[1]) >> 1,
1da177e4
LT		 123 gregs + GLOB_RSIZE);
124}
125
126#define TX_RESET_TRIES 32
127#define RX_RESET_TRIES 32
128
129static void bigmac_tx_reset(void __iomem *bregs)
130{
131 int tries = TX_RESET_TRIES;
132
133 sbus_writel(0, bregs + BMAC_TXCFG);
134
135 /* The fifo threshold bit is read-only and does
136 * not clear. -DaveM
137 */
138 while ((sbus_readl(bregs + BMAC_TXCFG) & ~(BIGMAC_TXCFG_FIFO)) != 0 &&
139 --tries != 0)
140 udelay(20);
141
142 if (!tries) {
143 printk(KERN_ERR "BIGMAC: Transmitter will not reset.\n");
144 printk(KERN_ERR "BIGMAC: tx_cfg is %08x\n",
145 sbus_readl(bregs + BMAC_TXCFG));
146 }
147}
148
149static void bigmac_rx_reset(void __iomem *bregs)
150{
151 int tries = RX_RESET_TRIES;
152
153 sbus_writel(0, bregs + BMAC_RXCFG);
154 while (sbus_readl(bregs + BMAC_RXCFG) && --tries)
155 udelay(20);
156
157 if (!tries) {
158 printk(KERN_ERR "BIGMAC: Receiver will not reset.\n");
159 printk(KERN_ERR "BIGMAC: rx_cfg is %08x\n",
160 sbus_readl(bregs + BMAC_RXCFG));
161 }
162}
163
164/* Reset the transmitter and receiver. */
165static void bigmac_stop(struct bigmac *bp)
166{
167 bigmac_tx_reset(bp->bregs);
168 bigmac_rx_reset(bp->bregs);
169}
170
171static void bigmac_get_counters(struct bigmac *bp, void __iomem *bregs)
172{
173 struct net_device_stats *stats = &bp->enet_stats;
174
175 stats->rx_crc_errors += sbus_readl(bregs + BMAC_RCRCECTR);
176 sbus_writel(0, bregs + BMAC_RCRCECTR);
177
178 stats->rx_frame_errors += sbus_readl(bregs + BMAC_UNALECTR);
179 sbus_writel(0, bregs + BMAC_UNALECTR);
180
181 stats->rx_length_errors += sbus_readl(bregs + BMAC_GLECTR);
182 sbus_writel(0, bregs + BMAC_GLECTR);
183
184 stats->tx_aborted_errors += sbus_readl(bregs + BMAC_EXCTR);
185
186 stats->collisions +=
187 (sbus_readl(bregs + BMAC_EXCTR) +
188 sbus_readl(bregs + BMAC_LTCTR));
189 sbus_writel(0, bregs + BMAC_EXCTR);
190 sbus_writel(0, bregs + BMAC_LTCTR);
191}
192
193static void bigmac_clean_rings(struct bigmac *bp)
194{
195 int i;
196
197 for (i = 0; i < RX_RING_SIZE; i++) {
198 if (bp->rx_skbs[i] != NULL) {
199 dev_kfree_skb_any(bp->rx_skbs[i]);
200 bp->rx_skbs[i] = NULL;
201 }
202 }
203
204 for (i = 0; i < TX_RING_SIZE; i++) {
205 if (bp->tx_skbs[i] != NULL) {
206 dev_kfree_skb_any(bp->tx_skbs[i]);
207 bp->tx_skbs[i] = NULL;
208 }
209 }
210}
211
212static void bigmac_init_rings(struct bigmac *bp, int from_irq)
213{
214 struct bmac_init_block *bb = bp->bmac_block;
215 struct net_device *dev = bp->dev;
9e24974d
AV		 216 int i;
217 gfp_t gfp_flags = GFP_KERNEL;
1da177e4
LT		 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 =
8ef2175c 243 dma_map_single(&bp->bigmac_op->dev,
738f2b7b
DM		 244 skb->data,
245 RX_BUF_ALLOC_SIZE - 34,
246 DMA_FROM_DEVICE);
1da177e4
LT		 247 bb->be_rxd[i].rx_flags =
248 (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
249 }
250
251 for (i = 0; i < TX_RING_SIZE; i++)
252 bb->be_txd[i].tx_flags = bb->be_txd[i].tx_addr = 0;
253}
254
255#define MGMT_CLKON (MGMT_PAL_INT_MDIO|MGMT_PAL_EXT_MDIO|MGMT_PAL_OENAB|MGMT_PAL_DCLOCK)
256#define MGMT_CLKOFF (MGMT_PAL_INT_MDIO|MGMT_PAL_EXT_MDIO|MGMT_PAL_OENAB)
257
258static void idle_transceiver(void __iomem *tregs)
259{
260 int i = 20;
261
262 while (i--) {
263 sbus_writel(MGMT_CLKOFF, tregs + TCVR_MPAL);
264 sbus_readl(tregs + TCVR_MPAL);
265 sbus_writel(MGMT_CLKON, tregs + TCVR_MPAL);
266 sbus_readl(tregs + TCVR_MPAL);
267 }
268}
269
270static void write_tcvr_bit(struct bigmac *bp, void __iomem *tregs, int bit)
271{
272 if (bp->tcvr_type == internal) {
273 bit = (bit & 1) << 3;
274 sbus_writel(bit | (MGMT_PAL_OENAB | MGMT_PAL_EXT_MDIO),
275 tregs + TCVR_MPAL);
276 sbus_readl(tregs + TCVR_MPAL);
277 sbus_writel(bit | MGMT_PAL_OENAB | MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK,
278 tregs + TCVR_MPAL);
279 sbus_readl(tregs + TCVR_MPAL);
280 } else if (bp->tcvr_type == external) {
281 bit = (bit & 1) << 2;
282 sbus_writel(bit | MGMT_PAL_INT_MDIO | MGMT_PAL_OENAB,
283 tregs + TCVR_MPAL);
284 sbus_readl(tregs + TCVR_MPAL);
285 sbus_writel(bit | MGMT_PAL_INT_MDIO | MGMT_PAL_OENAB | MGMT_PAL_DCLOCK,
286 tregs + TCVR_MPAL);
287 sbus_readl(tregs + TCVR_MPAL);
288 } else {
289 printk(KERN_ERR "write_tcvr_bit: No transceiver type known!\n");
290 }
291}
292
293static int read_tcvr_bit(struct bigmac *bp, void __iomem *tregs)
294{
295 int retval = 0;
296
297 if (bp->tcvr_type == internal) {
298 sbus_writel(MGMT_PAL_EXT_MDIO, tregs + TCVR_MPAL);
299 sbus_readl(tregs + TCVR_MPAL);
300 sbus_writel(MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK,
301 tregs + TCVR_MPAL);
302 sbus_readl(tregs + TCVR_MPAL);
303 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_INT_MDIO) >> 3;
304 } else if (bp->tcvr_type == external) {
305 sbus_writel(MGMT_PAL_INT_MDIO, tregs + TCVR_MPAL);
306 sbus_readl(tregs + TCVR_MPAL);
307 sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_DCLOCK, tregs + TCVR_MPAL);
308 sbus_readl(tregs + TCVR_MPAL);
309 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_EXT_MDIO) >> 2;
310 } else {
311 printk(KERN_ERR "read_tcvr_bit: No transceiver type known!\n");
312 }
313 return retval;
314}
315
316static int read_tcvr_bit2(struct bigmac *bp, void __iomem *tregs)
317{
318 int retval = 0;
319
320 if (bp->tcvr_type == internal) {
321 sbus_writel(MGMT_PAL_EXT_MDIO, tregs + TCVR_MPAL);
322 sbus_readl(tregs + TCVR_MPAL);
323 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_INT_MDIO) >> 3;
324 sbus_writel(MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK, tregs + TCVR_MPAL);
325 sbus_readl(tregs + TCVR_MPAL);
326 } else if (bp->tcvr_type == external) {
327 sbus_writel(MGMT_PAL_INT_MDIO, tregs + TCVR_MPAL);
328 sbus_readl(tregs + TCVR_MPAL);
329 retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_EXT_MDIO) >> 2;
330 sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_DCLOCK, tregs + TCVR_MPAL);
331 sbus_readl(tregs + TCVR_MPAL);
332 } else {
333 printk(KERN_ERR "read_tcvr_bit2: No transceiver type known!\n");
334 }
335 return retval;
336}
337
338static void put_tcvr_byte(struct bigmac *bp,
339 void __iomem *tregs,
340 unsigned int byte)
341{
342 int shift = 4;
343
344 do {
345 write_tcvr_bit(bp, tregs, ((byte >> shift) & 1));
346 shift -= 1;
347 } while (shift >= 0);
348}
349
350static void bigmac_tcvr_write(struct bigmac *bp, void __iomem *tregs,
351 int reg, unsigned short val)
352{
353 int shift;
354
355 reg &= 0xff;
356 val &= 0xffff;
357 switch(bp->tcvr_type) {
358 case internal:
359 case external:
360 break;
361
362 default:
363 printk(KERN_ERR "bigmac_tcvr_read: Whoops, no known transceiver type.\n");
364 return;
365 };
366
367 idle_transceiver(tregs);
368 write_tcvr_bit(bp, tregs, 0);
369 write_tcvr_bit(bp, tregs, 1);
370 write_tcvr_bit(bp, tregs, 0);
371 write_tcvr_bit(bp, tregs, 1);
372
373 put_tcvr_byte(bp, tregs,
374 ((bp->tcvr_type == internal) ?
375 BIGMAC_PHY_INTERNAL : BIGMAC_PHY_EXTERNAL));
376
377 put_tcvr_byte(bp, tregs, reg);
378
379 write_tcvr_bit(bp, tregs, 1);
380 write_tcvr_bit(bp, tregs, 0);
381
382 shift = 15;
383 do {
384 write_tcvr_bit(bp, tregs, (val >> shift) & 1);
385 shift -= 1;
386 } while (shift >= 0);
387}
388
389static unsigned short bigmac_tcvr_read(struct bigmac *bp,
390 void __iomem *tregs,
391 int reg)
392{
393 unsigned short retval = 0;
394
395 reg &= 0xff;
396 switch(bp->tcvr_type) {
397 case internal:
398 case external:
399 break;
400
401 default:
402 printk(KERN_ERR "bigmac_tcvr_read: Whoops, no known transceiver type.\n");
403 return 0xffff;
404 };
405
406 idle_transceiver(tregs);
407 write_tcvr_bit(bp, tregs, 0);
408 write_tcvr_bit(bp, tregs, 1);
409 write_tcvr_bit(bp, tregs, 1);
410 write_tcvr_bit(bp, tregs, 0);
411
412 put_tcvr_byte(bp, tregs,
413 ((bp->tcvr_type == internal) ?
414 BIGMAC_PHY_INTERNAL : BIGMAC_PHY_EXTERNAL));
415
416 put_tcvr_byte(bp, tregs, reg);
417
418 if (bp->tcvr_type == external) {
419 int shift = 15;
420
421 (void) read_tcvr_bit2(bp, tregs);
422 (void) read_tcvr_bit2(bp, tregs);
423
424 do {
425 int tmp;
426
427 tmp = read_tcvr_bit2(bp, tregs);
428 retval |= ((tmp & 1) << shift);
429 shift -= 1;
430 } while (shift >= 0);
431
432 (void) read_tcvr_bit2(bp, tregs);
433 (void) read_tcvr_bit2(bp, tregs);
434 (void) read_tcvr_bit2(bp, tregs);
435 } else {
436 int shift = 15;
437
438 (void) read_tcvr_bit(bp, tregs);
439 (void) read_tcvr_bit(bp, tregs);
440
441 do {
442 int tmp;
443
444 tmp = read_tcvr_bit(bp, tregs);
445 retval |= ((tmp & 1) << shift);
446 shift -= 1;
447 } while (shift >= 0);
448
449 (void) read_tcvr_bit(bp, tregs);
450 (void) read_tcvr_bit(bp, tregs);
451 (void) read_tcvr_bit(bp, tregs);
452 }
453 return retval;
454}
455
456static void bigmac_tcvr_init(struct bigmac *bp)
457{
458 void __iomem *tregs = bp->tregs;
459 u32 mpal;
460
461 idle_transceiver(tregs);
462 sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK,
463 tregs + TCVR_MPAL);
464 sbus_readl(tregs + TCVR_MPAL);
465
466 /* Only the bit for the present transceiver (internal or
467 * external) will stick, set them both and see what stays.
468 */
469 sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_EXT_MDIO, tregs + TCVR_MPAL);
470 sbus_readl(tregs + TCVR_MPAL);
471 udelay(20);
472
473 mpal = sbus_readl(tregs + TCVR_MPAL);
474 if (mpal & MGMT_PAL_EXT_MDIO) {
475 bp->tcvr_type = external;
476 sbus_writel(~(TCVR_PAL_EXTLBACK | TCVR_PAL_MSENSE | TCVR_PAL_LTENABLE),
477 tregs + TCVR_TPAL);
478 sbus_readl(tregs + TCVR_TPAL);
479 } else if (mpal & MGMT_PAL_INT_MDIO) {
480 bp->tcvr_type = internal;
481 sbus_writel(~(TCVR_PAL_SERIAL | TCVR_PAL_EXTLBACK |
482 TCVR_PAL_MSENSE | TCVR_PAL_LTENABLE),
483 tregs + TCVR_TPAL);
484 sbus_readl(tregs + TCVR_TPAL);
485 } else {
486 printk(KERN_ERR "BIGMAC: AIEEE, neither internal nor "
487 "external MDIO available!\n");
488 printk(KERN_ERR "BIGMAC: mgmt_pal[%08x] tcvr_pal[%08x]\n",
489 sbus_readl(tregs + TCVR_MPAL),
490 sbus_readl(tregs + TCVR_TPAL));
491 }
492}
493
52a34c7f 494static int bigmac_init_hw(struct bigmac *, int);
1da177e4
LT		 495
496static int try_next_permutation(struct bigmac *bp, void __iomem *tregs)
497{
498 if (bp->sw_bmcr & BMCR_SPEED100) {
499 int timeout;
500
501 /* Reset the PHY. */
502 bp->sw_bmcr = (BMCR_ISOLATE | BMCR_PDOWN | BMCR_LOOPBACK);
503 bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
504 bp->sw_bmcr = (BMCR_RESET);
505 bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
506
507 timeout = 64;
508 while (--timeout) {
509 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
510 if ((bp->sw_bmcr & BMCR_RESET) == 0)
511 break;
512 udelay(20);
513 }
514 if (timeout == 0)
515 printk(KERN_ERR "%s: PHY reset failed.\n", bp->dev->name);
516
517 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
518
519 /* Now we try 10baseT. */
520 bp->sw_bmcr &= ~(BMCR_SPEED100);
521 bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
522 return 0;
523 }
524
525 /* We've tried them all. */
526 return -1;
527}
528
529static void bigmac_timer(unsigned long data)
530{
531 struct bigmac *bp = (struct bigmac *) data;
532 void __iomem *tregs = bp->tregs;
533 int restart_timer = 0;
534
535 bp->timer_ticks++;
536 if (bp->timer_state == ltrywait) {
537 bp->sw_bmsr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMSR);
538 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
539 if (bp->sw_bmsr & BMSR_LSTATUS) {
540 printk(KERN_INFO "%s: Link is now up at %s.\n",
541 bp->dev->name,
542 (bp->sw_bmcr & BMCR_SPEED100) ?
543 "100baseT" : "10baseT");
544 bp->timer_state = asleep;
545 restart_timer = 0;
546 } else {
547 if (bp->timer_ticks >= 4) {
548 int ret;
549
550 ret = try_next_permutation(bp, tregs);
551 if (ret == -1) {
552 printk(KERN_ERR "%s: Link down, cable problem?\n",
553 bp->dev->name);
52a34c7f 554 ret = bigmac_init_hw(bp, 0);
1da177e4
LT		 555 if (ret) {
556 printk(KERN_ERR "%s: Error, cannot re-init the "
557 "BigMAC.\n", bp->dev->name);
558 }
559 return;
560 }
561 bp->timer_ticks = 0;
562 restart_timer = 1;
563 } else {
564 restart_timer = 1;
565 }
566 }
567 } else {
568 /* Can't happens.... */
569 printk(KERN_ERR "%s: Aieee, link timer is asleep but we got one anyways!\n",
570 bp->dev->name);
571 restart_timer = 0;
572 bp->timer_ticks = 0;
573 bp->timer_state = asleep; /* foo on you */
574 }
575
576 if (restart_timer != 0) {
577 bp->bigmac_timer.expires = jiffies + ((12 * HZ)/10); /* 1.2 sec. */
578 add_timer(&bp->bigmac_timer);
579 }
580}
581
582/* Well, really we just force the chip into 100baseT then
583 * 10baseT, each time checking for a link status.
584 */
585static void bigmac_begin_auto_negotiation(struct bigmac *bp)
586{
587 void __iomem *tregs = bp->tregs;
588 int timeout;
589
590 /* Grab new software copies of PHY registers. */
591 bp->sw_bmsr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMSR);
592 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
593
594 /* Reset the PHY. */
595 bp->sw_bmcr = (BMCR_ISOLATE | BMCR_PDOWN | BMCR_LOOPBACK);
596 bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
597 bp->sw_bmcr = (BMCR_RESET);
598 bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
599
600 timeout = 64;
601 while (--timeout) {
602 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
603 if ((bp->sw_bmcr & BMCR_RESET) == 0)
604 break;
605 udelay(20);
606 }
607 if (timeout == 0)
608 printk(KERN_ERR "%s: PHY reset failed.\n", bp->dev->name);
609
610 bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR);
611
612 /* First we try 100baseT. */
613 bp->sw_bmcr |= BMCR_SPEED100;
614 bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr);
615
616 bp->timer_state = ltrywait;
617 bp->timer_ticks = 0;
618 bp->bigmac_timer.expires = jiffies + (12 * HZ) / 10;
619 bp->bigmac_timer.data = (unsigned long) bp;
620 bp->bigmac_timer.function = &bigmac_timer;
621 add_timer(&bp->bigmac_timer);
622}
623
52a34c7f 624static int bigmac_init_hw(struct bigmac *bp, int from_irq)
1da177e4
LT		 625{
626 void __iomem *gregs = bp->gregs;
627 void __iomem *cregs = bp->creg;
628 void __iomem *bregs = bp->bregs;
629 unsigned char *e = &bp->dev->dev_addr[0];
630
631 /* Latch current counters into statistics. */
632 bigmac_get_counters(bp, bregs);
633
634 /* Reset QEC. */
635 qec_global_reset(gregs);
636
637 /* Init QEC. */
638 qec_init(bp);
639
640 /* Alloc and reset the tx/rx descriptor chains. */
641 bigmac_init_rings(bp, from_irq);
642
643 /* Initialize the PHY. */
644 bigmac_tcvr_init(bp);
645
646 /* Stop transmitter and receiver. */
647 bigmac_stop(bp);
648
649 /* Set hardware ethernet address. */
650 sbus_writel(((e[4] << 8) | e[5]), bregs + BMAC_MACADDR2);
651 sbus_writel(((e[2] << 8) | e[3]), bregs + BMAC_MACADDR1);
652 sbus_writel(((e[0] << 8) | e[1]), bregs + BMAC_MACADDR0);
653
654 /* Clear the hash table until mc upload occurs. */
655 sbus_writel(0, bregs + BMAC_HTABLE3);
656 sbus_writel(0, bregs + BMAC_HTABLE2);
657 sbus_writel(0, bregs + BMAC_HTABLE1);
658 sbus_writel(0, bregs + BMAC_HTABLE0);
659
660 /* Enable Big Mac hash table filter. */
661 sbus_writel(BIGMAC_RXCFG_HENABLE | BIGMAC_RXCFG_FIFO,
662 bregs + BMAC_RXCFG);
663 udelay(20);
664
665 /* Ok, configure the Big Mac transmitter. */
666 sbus_writel(BIGMAC_TXCFG_FIFO, bregs + BMAC_TXCFG);
667
668 /* The HME docs recommend to use the 10LSB of our MAC here. */
669 sbus_writel(((e[5] | e[4] << 8) & 0x3ff),
670 bregs + BMAC_RSEED);
671
672 /* Enable the output drivers no matter what. */
673 sbus_writel(BIGMAC_XCFG_ODENABLE | BIGMAC_XCFG_RESV,
674 bregs + BMAC_XIFCFG);
675
676 /* Tell the QEC where the ring descriptors are. */
677 sbus_writel(bp->bblock_dvma + bib_offset(be_rxd, 0),
678 cregs + CREG_RXDS);
679 sbus_writel(bp->bblock_dvma + bib_offset(be_txd, 0),
680 cregs + CREG_TXDS);
681
682 /* Setup the FIFO pointers into QEC local memory. */
683 sbus_writel(0, cregs + CREG_RXRBUFPTR);
684 sbus_writel(0, cregs + CREG_RXWBUFPTR);
685 sbus_writel(sbus_readl(gregs + GLOB_RSIZE),
686 cregs + CREG_TXRBUFPTR);
687 sbus_writel(sbus_readl(gregs + GLOB_RSIZE),
688 cregs + CREG_TXWBUFPTR);
689
690 /* Tell bigmac what interrupts we don't want to hear about. */
691 sbus_writel(BIGMAC_IMASK_GOTFRAME | BIGMAC_IMASK_SENTFRAME,
692 bregs + BMAC_IMASK);
693
694 /* Enable the various other irq's. */
695 sbus_writel(0, cregs + CREG_RIMASK);
696 sbus_writel(0, cregs + CREG_TIMASK);
697 sbus_writel(0, cregs + CREG_QMASK);
698 sbus_writel(0, cregs + CREG_BMASK);
699
700 /* Set jam size to a reasonable default. */
701 sbus_writel(DEFAULT_JAMSIZE, bregs + BMAC_JSIZE);
702
703 /* Clear collision counter. */
704 sbus_writel(0, cregs + CREG_CCNT);
705
706 /* Enable transmitter and receiver. */
707 sbus_writel(sbus_readl(bregs + BMAC_TXCFG) | BIGMAC_TXCFG_ENABLE,
708 bregs + BMAC_TXCFG);
709 sbus_writel(sbus_readl(bregs + BMAC_RXCFG) | BIGMAC_RXCFG_ENABLE,
710 bregs + BMAC_RXCFG);
711
712 /* Ok, start detecting link speed/duplex. */
713 bigmac_begin_auto_negotiation(bp);
714
715 /* Success. */
716 return 0;
717}
718
719/* Error interrupts get sent here. */
720static void bigmac_is_medium_rare(struct bigmac *bp, u32 qec_status, u32 bmac_status)
721{
722 printk(KERN_ERR "bigmac_is_medium_rare: ");
723 if (qec_status & (GLOB_STAT_ER | GLOB_STAT_BM)) {
724 if (qec_status & GLOB_STAT_ER)
725 printk("QEC_ERROR, ");
726 if (qec_status & GLOB_STAT_BM)
727 printk("QEC_BMAC_ERROR, ");
728 }
729 if (bmac_status & CREG_STAT_ERRORS) {
730 if (bmac_status & CREG_STAT_BERROR)
731 printk("BMAC_ERROR, ");
732 if (bmac_status & CREG_STAT_TXDERROR)
733 printk("TXD_ERROR, ");
734 if (bmac_status & CREG_STAT_TXLERR)
735 printk("TX_LATE_ERROR, ");
736 if (bmac_status & CREG_STAT_TXPERR)
737 printk("TX_PARITY_ERROR, ");
738 if (bmac_status & CREG_STAT_TXSERR)
739 printk("TX_SBUS_ERROR, ");
740
741 if (bmac_status & CREG_STAT_RXDROP)
742 printk("RX_DROP_ERROR, ");
743
744 if (bmac_status & CREG_STAT_RXSMALL)
745 printk("RX_SMALL_ERROR, ");
746 if (bmac_status & CREG_STAT_RXLERR)
747 printk("RX_LATE_ERROR, ");
748 if (bmac_status & CREG_STAT_RXPERR)
749 printk("RX_PARITY_ERROR, ");
750 if (bmac_status & CREG_STAT_RXSERR)
751 printk("RX_SBUS_ERROR, ");
752 }
753
754 printk(" RESET\n");
52a34c7f 755 bigmac_init_hw(bp, 1);
1da177e4
LT		 756}
757
758/* BigMAC transmit complete service routines. */
759static void bigmac_tx(struct bigmac *bp)
760{
761 struct be_txd *txbase = &bp->bmac_block->be_txd[0];
762 struct net_device *dev = bp->dev;
763 int elem;
764
765 spin_lock(&bp->lock);
766
767 elem = bp->tx_old;
768 DTX(("bigmac_tx: tx_old[%d] ", elem));
769 while (elem != bp->tx_new) {
770 struct sk_buff *skb;
771 struct be_txd *this = &txbase[elem];
772
773 DTX(("this(%p) [flags(%08x)addr(%08x)]",
774 this, this->tx_flags, this->tx_addr));
775
776 if (this->tx_flags & TXD_OWN)
777 break;
778 skb = bp->tx_skbs[elem];
779 bp->enet_stats.tx_packets++;
780 bp->enet_stats.tx_bytes += skb->len;
8ef2175c 781 dma_unmap_single(&bp->bigmac_op->dev,
738f2b7b
DM		 782 this->tx_addr, skb->len,
783 DMA_TO_DEVICE);
1da177e4
LT		 784
785 DTX(("skb(%p) ", skb));
786 bp->tx_skbs[elem] = NULL;
787 dev_kfree_skb_irq(skb);
788
789 elem = NEXT_TX(elem);
790 }
791 DTX((" DONE, tx_old=%d\n", elem));
792 bp->tx_old = elem;
793
794 if (netif_queue_stopped(dev) &&
795 TX_BUFFS_AVAIL(bp) > 0)
796 netif_wake_queue(bp->dev);
797
798 spin_unlock(&bp->lock);
799}
800
801/* BigMAC receive complete service routines. */
802static void bigmac_rx(struct bigmac *bp)
803{
804 struct be_rxd *rxbase = &bp->bmac_block->be_rxd[0];
805 struct be_rxd *this;
806 int elem = bp->rx_new, drops = 0;
807 u32 flags;
808
809 this = &rxbase[elem];
810 while (!((flags = this->rx_flags) & RXD_OWN)) {
811 struct sk_buff *skb;
812 int len = (flags & RXD_LENGTH); /* FCS not included */
813
814 /* Check for errors. */
815 if (len < ETH_ZLEN) {
816 bp->enet_stats.rx_errors++;
817 bp->enet_stats.rx_length_errors++;
818
819 drop_it:
820 /* Return it to the BigMAC. */
821 bp->enet_stats.rx_dropped++;
822 this->rx_flags =
823 (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
824 goto next;
825 }
826 skb = bp->rx_skbs[elem];
827 if (len > RX_COPY_THRESHOLD) {
828 struct sk_buff *new_skb;
829
830 /* Now refill the entry, if we can. */
831 new_skb = big_mac_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
832 if (new_skb == NULL) {
833 drops++;
834 goto drop_it;
835 }
8ef2175c 836 dma_unmap_single(&bp->bigmac_op->dev,
738f2b7b
DM		 837 this->rx_addr,
838 RX_BUF_ALLOC_SIZE - 34,
839 DMA_FROM_DEVICE);
1da177e4
LT		 840 bp->rx_skbs[elem] = new_skb;
841 new_skb->dev = bp->dev;
842 skb_put(new_skb, ETH_FRAME_LEN);
843 skb_reserve(new_skb, 34);
7a715f46 844 this->rx_addr =
8ef2175c 845 dma_map_single(&bp->bigmac_op->dev,
738f2b7b
DM		 846 new_skb->data,
847 RX_BUF_ALLOC_SIZE - 34,
848 DMA_FROM_DEVICE);
1da177e4
LT		 849 this->rx_flags =
850 (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
851
852 /* Trim the original skb for the netif. */
853 skb_trim(skb, len);
854 } else {
855 struct sk_buff *copy_skb = dev_alloc_skb(len + 2);
856
857 if (copy_skb == NULL) {
858 drops++;
859 goto drop_it;
860 }
1da177e4
LT		 861 skb_reserve(copy_skb, 2);
862 skb_put(copy_skb, len);
8ef2175c 863 dma_sync_single_for_cpu(&bp->bigmac_op->dev,
738f2b7b
DM		 864 this->rx_addr, len,
865 DMA_FROM_DEVICE);
8c7b7faa 866 skb_copy_to_linear_data(copy_skb, (unsigned char *)skb->data, len);
8ef2175c 867 dma_sync_single_for_device(&bp->bigmac_op->dev,
738f2b7b
DM		 868 this->rx_addr, len,
869 DMA_FROM_DEVICE);
1da177e4
LT		 870
871 /* Reuse original ring buffer. */
872 this->rx_flags =
873 (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH));
874
875 skb = copy_skb;
876 }
877
878 /* No checksums done by the BigMAC ;-( */
879 skb->protocol = eth_type_trans(skb, bp->dev);
880 netif_rx(skb);
1da177e4
LT		 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
7d12e780 892static irqreturn_t bigmac_interrupt(int irq, void *dev_id)
1da177e4
LT		 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
917static int bigmac_open(struct net_device *dev)
918{
8f15ea42 919 struct bigmac *bp = netdev_priv(dev);
1da177e4
LT		 920 int ret;
921
a0607fd3 922 ret = request_irq(dev->irq, bigmac_interrupt, IRQF_SHARED, dev->name, bp);
1da177e4
LT		 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);
52a34c7f 928 ret = bigmac_init_hw(bp, 0);
1da177e4
LT		 929 if (ret)
930 free_irq(dev->irq, bp);
931 return ret;
932}
933
934static int bigmac_close(struct net_device *dev)
935{
8f15ea42 936 struct bigmac *bp = netdev_priv(dev);
1da177e4
LT		 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
948static void bigmac_tx_timeout(struct net_device *dev)
949{
8f15ea42 950 struct bigmac *bp = netdev_priv(dev);
1da177e4 951
52a34c7f 952 bigmac_init_hw(bp, 0);
1da177e4
LT		 953 netif_wake_queue(dev);
954}
955
956/* Put a packet on the wire. */
957static int bigmac_start_xmit(struct sk_buff *skb, struct net_device *dev)
958{
8f15ea42 959 struct bigmac *bp = netdev_priv(dev);
1da177e4
LT		 960 int len, entry;
961 u32 mapping;
962
963 len = skb->len;
8ef2175c 964 mapping = dma_map_single(&bp->bigmac_op->dev, skb->data,
738f2b7b 965 len, DMA_TO_DEVICE);
1da177e4
LT		 966
967 /* Avoid a race... */
968 spin_lock_irq(&bp->lock);
969 entry = bp->tx_new;
970 DTX(("bigmac_start_xmit: len(%d) entry(%d)\n", len, entry));
971 bp->bmac_block->be_txd[entry].tx_flags = TXD_UPDATE;
972 bp->tx_skbs[entry] = skb;
973 bp->bmac_block->be_txd[entry].tx_addr = mapping;
974 bp->bmac_block->be_txd[entry].tx_flags =
975 (TXD_OWN | TXD_SOP | TXD_EOP | (len & TXD_LENGTH));
976 bp->tx_new = NEXT_TX(entry);
977 if (TX_BUFFS_AVAIL(bp) <= 0)
978 netif_stop_queue(dev);
979 spin_unlock_irq(&bp->lock);
980
981 /* Get it going. */
982 sbus_writel(CREG_CTRL_TWAKEUP, bp->creg + CREG_CTRL);
983
984
985 dev->trans_start = jiffies;
986
6ed10654 987 return NETDEV_TX_OK;
1da177e4
LT		 988}
989
990static struct net_device_stats *bigmac_get_stats(struct net_device *dev)
991{
8f15ea42 992 struct bigmac *bp = netdev_priv(dev);
1da177e4
LT		 993
994 bigmac_get_counters(bp, bp->bregs);
995 return &bp->enet_stats;
996}
997
998static void bigmac_set_multicast(struct net_device *dev)
999{
8f15ea42 1000 struct bigmac *bp = netdev_priv(dev);
1da177e4 1001 void __iomem *bregs = bp->bregs;
5508590c 1002 struct dev_mc_list *dmi;
1da177e4
LT		 1003 char *addrs;
1004 int i;
1005 u32 tmp, crc;
1006
1007 /* Disable the receiver. The bit self-clears when
1008 * the operation is complete.
1009 */
1010 tmp = sbus_readl(bregs + BMAC_RXCFG);
1011 tmp &= ~(BIGMAC_RXCFG_ENABLE);
1012 sbus_writel(tmp, bregs + BMAC_RXCFG);
1013 while ((sbus_readl(bregs + BMAC_RXCFG) & BIGMAC_RXCFG_ENABLE) != 0)
1014 udelay(20);
1015
4cd24eaf 1016 if ((dev->flags & IFF_ALLMULTI) || (netdev_mc_count(dev) > 64)) {
1da177e4
LT		 1017 sbus_writel(0xffff, bregs + BMAC_HTABLE0);
1018 sbus_writel(0xffff, bregs + BMAC_HTABLE1);
1019 sbus_writel(0xffff, bregs + BMAC_HTABLE2);
1020 sbus_writel(0xffff, bregs + BMAC_HTABLE3);
1021 } else if (dev->flags & IFF_PROMISC) {
1022 tmp = sbus_readl(bregs + BMAC_RXCFG);
1023 tmp |= BIGMAC_RXCFG_PMISC;
1024 sbus_writel(tmp, bregs + BMAC_RXCFG);
1025 } else {
1026 u16 hash_table[4];
1027
1028 for (i = 0; i < 4; i++)
1029 hash_table[i] = 0;
1030
5508590c 1031 netdev_for_each_mc_addr(dmi, dev) {
1da177e4 1032 addrs = dmi->dmi_addr;
1da177e4
LT		 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... */
1054static void bigmac_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1055{
1da177e4
LT		 1056 strcpy(info->driver, "sunbmac");
1057 strcpy(info->version, "2.0");
1da177e4
LT		 1058}
1059
1060static u32 bigmac_get_link(struct net_device *dev)
1061{
8f15ea42 1062 struct bigmac *bp = netdev_priv(dev);
1da177e4
LT		 1063
1064 spin_lock_irq(&bp->lock);
1065 bp->sw_bmsr = bigmac_tcvr_read(bp, bp->tregs, BIGMAC_BMSR);
1066 spin_unlock_irq(&bp->lock);
1067
1068 return (bp->sw_bmsr & BMSR_LSTATUS);
1069}
1070
7282d491 1071static const struct ethtool_ops bigmac_ethtool_ops = {
1da177e4
LT		 1072 .get_drvinfo = bigmac_get_drvinfo,
1073 .get_link = bigmac_get_link,
1074};
1075
2199b87a
DM		 1076static const struct net_device_ops bigmac_ops = {
1077 .ndo_open = bigmac_open,
1078 .ndo_stop = bigmac_close,
1079 .ndo_start_xmit = bigmac_start_xmit,
1080 .ndo_get_stats = bigmac_get_stats,
1081 .ndo_set_multicast_list = bigmac_set_multicast,
1082 .ndo_tx_timeout = bigmac_tx_timeout,
dac4696a
DM		 1083 .ndo_change_mtu = eth_change_mtu,
1084 .ndo_set_mac_address = eth_mac_addr,
1085 .ndo_validate_addr = eth_validate_addr,
2199b87a
DM		 1086};
1087
8ef2175c
DM		 1088static int __devinit bigmac_ether_init(struct of_device *op,
1089 struct of_device *qec_op)
1da177e4 1090{
1da177e4 1091 static int version_printed;
8ef2175c 1092 struct net_device *dev;
1da177e4 1093 u8 bsizes, bsizes_more;
8ef2175c
DM		 1094 struct bigmac *bp;
1095 int i;
1da177e4
LT		 1096
1097 /* Get a new device struct for this interface. */
1098 dev = alloc_etherdev(sizeof(struct bigmac));
1099 if (!dev)
1100 return -ENOMEM;
1da177e4
LT		 1101
1102 if (version_printed++ == 0)
1103 printk(KERN_INFO "%s", version);
1104
1da177e4
LT		 1105 for (i = 0; i < 6; i++)
1106 dev->dev_addr[i] = idprom->id_ethaddr[i];
1107
1108 /* Setup softc, with backpointers to QEC and BigMAC SBUS device structs. */
8ef2175c
DM		 1109 bp = netdev_priv(dev);
1110 bp->qec_op = qec_op;
1111 bp->bigmac_op = op;
1da177e4 1112
8ef2175c 1113 SET_NETDEV_DEV(dev, &op->dev);
52a34c7f 1114
1da177e4
LT		 1115 spin_lock_init(&bp->lock);
1116
1da177e4 1117 /* Map in QEC global control registers. */
8ef2175c
DM		 1118 bp->gregs = of_ioremap(&qec_op->resource[0], 0,
1119 GLOB_REG_SIZE, "BigMAC QEC GLobal Regs");
1da177e4
LT		 1120 if (!bp->gregs) {
1121 printk(KERN_ERR "BIGMAC: Cannot map QEC global registers.\n");
1122 goto fail_and_cleanup;
1123 }
1124
1125 /* Make sure QEC is in BigMAC mode. */
1126 if ((sbus_readl(bp->gregs + GLOB_CTRL) & 0xf0000000) != GLOB_CTRL_BMODE) {
1127 printk(KERN_ERR "BigMAC: AIEEE, QEC is not in BigMAC mode!\n");
1128 goto fail_and_cleanup;
1129 }
1130
1131 /* Reset the QEC. */
1132 if (qec_global_reset(bp->gregs))
1133 goto fail_and_cleanup;
1134
1135 /* Get supported SBUS burst sizes. */
8ef2175c
DM		 1136 bsizes = of_getintprop_default(qec_op->node, "burst-sizes", 0xff);
1137 bsizes_more = of_getintprop_default(qec_op->node, "burst-sizes", 0xff);
1da177e4
LT		 1138
1139 bsizes &= 0xff;
1140 if (bsizes_more != 0xff)
1141 bsizes &= bsizes_more;
1142 if (bsizes == 0xff || (bsizes & DMA_BURST16) == 0 ||
1143 (bsizes & DMA_BURST32) == 0)
1144 bsizes = (DMA_BURST32 - 1);
1145 bp->bigmac_bursts = bsizes;
1146
1147 /* Perform QEC initialization. */
1148 qec_init(bp);
1149
1150 /* Map in the BigMAC channel registers. */
8ef2175c
DM		 1151 bp->creg = of_ioremap(&op->resource[0], 0,
1152 CREG_REG_SIZE, "BigMAC QEC Channel Regs");
1da177e4
LT		 1153 if (!bp->creg) {
1154 printk(KERN_ERR "BIGMAC: Cannot map QEC channel registers.\n");
1155 goto fail_and_cleanup;
1156 }
1157
1158 /* Map in the BigMAC control registers. */
8ef2175c
DM		 1159 bp->bregs = of_ioremap(&op->resource[1], 0,
1160 BMAC_REG_SIZE, "BigMAC Primary Regs");
1da177e4
LT		 1161 if (!bp->bregs) {
1162 printk(KERN_ERR "BIGMAC: Cannot map BigMAC primary registers.\n");
1163 goto fail_and_cleanup;
1164 }
1165
1166 /* Map in the BigMAC transceiver registers, this is how you poke at
1167 * the BigMAC's PHY.
1168 */
8ef2175c
DM		 1169 bp->tregs = of_ioremap(&op->resource[2], 0,
1170 TCVR_REG_SIZE, "BigMAC Transceiver Regs");
1da177e4
LT		 1171 if (!bp->tregs) {
1172 printk(KERN_ERR "BIGMAC: Cannot map BigMAC transceiver registers.\n");
1173 goto fail_and_cleanup;
1174 }
1175
1176 /* Stop the BigMAC. */
1177 bigmac_stop(bp);
1178
1179 /* Allocate transmit/receive descriptor DVMA block. */
8ef2175c 1180 bp->bmac_block = dma_alloc_coherent(&bp->bigmac_op->dev,
738f2b7b
DM		 1181 PAGE_SIZE,
1182 &bp->bblock_dvma, GFP_ATOMIC);
1da177e4
LT		 1183 if (bp->bmac_block == NULL || bp->bblock_dvma == 0) {
1184 printk(KERN_ERR "BIGMAC: Cannot allocate consistent DMA.\n");
1185 goto fail_and_cleanup;
1186 }
1187
1188 /* Get the board revision of this BigMAC. */
8ef2175c
DM		 1189 bp->board_rev = of_getintprop_default(bp->bigmac_op->node,
1190 "board-version", 1);
1da177e4
LT		 1191
1192 /* Init auto-negotiation timer state. */
1193 init_timer(&bp->bigmac_timer);
1194 bp->timer_state = asleep;
1195 bp->timer_ticks = 0;
1196
1197 /* Backlink to generic net device struct. */
1198 bp->dev = dev;
1199
1200 /* Set links to our BigMAC open and close routines. */
1da177e4 1201 dev->ethtool_ops = &bigmac_ethtool_ops;
2199b87a 1202 dev->netdev_ops = &bigmac_ops;
1da177e4
LT		 1203 dev->watchdog_timeo = 5*HZ;
1204
1205 /* Finish net device registration. */
8ef2175c 1206 dev->irq = bp->bigmac_op->irqs[0];
1da177e4
LT		 1207 dev->dma = 0;
1208
1209 if (register_netdev(dev)) {
1210 printk(KERN_ERR "BIGMAC: Cannot register device.\n");
1211 goto fail_and_cleanup;
1212 }
1213
8ef2175c 1214 dev_set_drvdata(&bp->bigmac_op->dev, bp);
1da177e4 1215
e174961c
JB		 1216 printk(KERN_INFO "%s: BigMAC 100baseT Ethernet %pM\n",
1217 dev->name, dev->dev_addr);
1da177e4
LT		 1218
1219 return 0;
1220
1221fail_and_cleanup:
1222 /* Something went wrong, undo whatever we did so far. */
1223 /* Free register mappings if any. */
1224 if (bp->gregs)
8ef2175c 1225 of_iounmap(&qec_op->resource[0], bp->gregs, GLOB_REG_SIZE);
1da177e4 1226 if (bp->creg)
8ef2175c 1227 of_iounmap(&op->resource[0], bp->creg, CREG_REG_SIZE);
1da177e4 1228 if (bp->bregs)
8ef2175c 1229 of_iounmap(&op->resource[1], bp->bregs, BMAC_REG_SIZE);
1da177e4 1230 if (bp->tregs)
8ef2175c 1231 of_iounmap(&op->resource[2], bp->tregs, TCVR_REG_SIZE);
1da177e4
LT		 1232
1233 if (bp->bmac_block)
8ef2175c 1234 dma_free_coherent(&bp->bigmac_op->dev,
738f2b7b
DM		 1235 PAGE_SIZE,
1236 bp->bmac_block,
1237 bp->bblock_dvma);
1da177e4 1238
b74ca3a8 1239 /* This also frees the co-located private data */
1da177e4
LT		 1240 free_netdev(dev);
1241 return -ENODEV;
1242}
1243
8ef2175c
DM		 1244/* QEC can be the parent of either QuadEthernet or a BigMAC. We want
1245 * the latter.
1da177e4 1246 */
8ef2175c
DM		 1247static int __devinit bigmac_sbus_probe(struct of_device *op,
1248 const struct of_device_id *match)
1da177e4 1249{
8ef2175c
DM		 1250 struct device *parent = op->dev.parent;
1251 struct of_device *qec_op;
1da177e4 1252
8ef2175c 1253 qec_op = to_of_device(parent);
1da177e4 1254
8ef2175c 1255 return bigmac_ether_init(op, qec_op);
1da177e4
LT		 1256}
1257
8ef2175c 1258static int __devexit bigmac_sbus_remove(struct of_device *op)
1da177e4 1259{
8ef2175c
DM		 1260 struct bigmac *bp = dev_get_drvdata(&op->dev);
1261 struct device *parent = op->dev.parent;
52a34c7f 1262 struct net_device *net_dev = bp->dev;
8ef2175c
DM		 1263 struct of_device *qec_op;
1264
1265 qec_op = to_of_device(parent);
52a34c7f 1266
7afb9dc9 1267 unregister_netdev(net_dev);
52a34c7f 1268
8ef2175c
DM		 1269 of_iounmap(&qec_op->resource[0], bp->gregs, GLOB_REG_SIZE);
1270 of_iounmap(&op->resource[0], bp->creg, CREG_REG_SIZE);
1271 of_iounmap(&op->resource[1], bp->bregs, BMAC_REG_SIZE);
1272 of_iounmap(&op->resource[2], bp->tregs, TCVR_REG_SIZE);
1273 dma_free_coherent(&op->dev,
738f2b7b
DM		 1274 PAGE_SIZE,
1275 bp->bmac_block,
1276 bp->bblock_dvma);
52a34c7f
DM		 1277
1278 free_netdev(net_dev);
1279
8ef2175c 1280 dev_set_drvdata(&op->dev, NULL);
52a34c7f 1281
1da177e4
LT		 1282 return 0;
1283}
1284
fd098316 1285static const struct of_device_id bigmac_sbus_match[] = {
52a34c7f
DM		 1286 {
1287 .name = "be",
1288 },
1289 {},
1290};
1da177e4 1291
52a34c7f 1292MODULE_DEVICE_TABLE(of, bigmac_sbus_match);
1da177e4 1293
52a34c7f
DM		 1294static struct of_platform_driver bigmac_sbus_driver = {
1295 .name = "sunbmac",
1296 .match_table = bigmac_sbus_match,
1297 .probe = bigmac_sbus_probe,
1298 .remove = __devexit_p(bigmac_sbus_remove),
1299};
1300
1301static int __init bigmac_init(void)
1302{
8ef2175c 1303 return of_register_driver(&bigmac_sbus_driver, &of_bus_type);
52a34c7f
DM		 1304}
1305
1306static void __exit bigmac_exit(void)
1307{
1308 of_unregister_driver(&bigmac_sbus_driver);
1da177e4
LT		 1309}
1310
52a34c7f
DM		 1311module_init(bigmac_init);
1312module_exit(bigmac_exit);
Linux 6.x block layer and io_uring tree(s)