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Merge branch 'bnxt_en-updates'
[deliverable/linux.git] / drivers / net / ethernet / broadcom / bgmac.c
1 /*
2 * Driver for (BCM4706)? GBit MAC core on BCMA bus.
3 *
4 * Copyright (C) 2012 Rafał Miłecki <zajec5@gmail.com>
5 *
6 * Licensed under the GNU/GPL. See COPYING for details.
7 */
8
9 #include "bgmac.h"
10
11 #include <linux/kernel.h>
12 #include <linux/module.h>
13 #include <linux/delay.h>
14 #include <linux/etherdevice.h>
15 #include <linux/mii.h>
16 #include <linux/phy.h>
17 #include <linux/phy_fixed.h>
18 #include <linux/interrupt.h>
19 #include <linux/dma-mapping.h>
20 #include <linux/bcm47xx_nvram.h>
21
22 static const struct bcma_device_id bgmac_bcma_tbl[] = {
23 BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_4706_MAC_GBIT, BCMA_ANY_REV, BCMA_ANY_CLASS),
24 BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_MAC_GBIT, BCMA_ANY_REV, BCMA_ANY_CLASS),
25 {},
26 };
27 MODULE_DEVICE_TABLE(bcma, bgmac_bcma_tbl);
28
29 static inline bool bgmac_is_bcm4707_family(struct bgmac *bgmac)
30 {
31 switch (bgmac->core->bus->chipinfo.id) {
32 case BCMA_CHIP_ID_BCM4707:
33 case BCMA_CHIP_ID_BCM47094:
34 case BCMA_CHIP_ID_BCM53018:
35 return true;
36 default:
37 return false;
38 }
39 }
40
41 static bool bgmac_wait_value(struct bcma_device *core, u16 reg, u32 mask,
42 u32 value, int timeout)
43 {
44 u32 val;
45 int i;
46
47 for (i = 0; i < timeout / 10; i++) {
48 val = bcma_read32(core, reg);
49 if ((val & mask) == value)
50 return true;
51 udelay(10);
52 }
53 pr_err("Timeout waiting for reg 0x%X\n", reg);
54 return false;
55 }
56
57 /**************************************************
58 * DMA
59 **************************************************/
60
61 static void bgmac_dma_tx_reset(struct bgmac *bgmac, struct bgmac_dma_ring *ring)
62 {
63 u32 val;
64 int i;
65
66 if (!ring->mmio_base)
67 return;
68
69 /* Suspend DMA TX ring first.
70 * bgmac_wait_value doesn't support waiting for any of few values, so
71 * implement whole loop here.
72 */
73 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_CTL,
74 BGMAC_DMA_TX_SUSPEND);
75 for (i = 0; i < 10000 / 10; i++) {
76 val = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_STATUS);
77 val &= BGMAC_DMA_TX_STAT;
78 if (val == BGMAC_DMA_TX_STAT_DISABLED ||
79 val == BGMAC_DMA_TX_STAT_IDLEWAIT ||
80 val == BGMAC_DMA_TX_STAT_STOPPED) {
81 i = 0;
82 break;
83 }
84 udelay(10);
85 }
86 if (i)
87 bgmac_err(bgmac, "Timeout suspending DMA TX ring 0x%X (BGMAC_DMA_TX_STAT: 0x%08X)\n",
88 ring->mmio_base, val);
89
90 /* Remove SUSPEND bit */
91 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_CTL, 0);
92 if (!bgmac_wait_value(bgmac->core,
93 ring->mmio_base + BGMAC_DMA_TX_STATUS,
94 BGMAC_DMA_TX_STAT, BGMAC_DMA_TX_STAT_DISABLED,
95 10000)) {
96 bgmac_warn(bgmac, "DMA TX ring 0x%X wasn't disabled on time, waiting additional 300us\n",
97 ring->mmio_base);
98 udelay(300);
99 val = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_STATUS);
100 if ((val & BGMAC_DMA_TX_STAT) != BGMAC_DMA_TX_STAT_DISABLED)
101 bgmac_err(bgmac, "Reset of DMA TX ring 0x%X failed\n",
102 ring->mmio_base);
103 }
104 }
105
106 static void bgmac_dma_tx_enable(struct bgmac *bgmac,
107 struct bgmac_dma_ring *ring)
108 {
109 u32 ctl;
110
111 ctl = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_CTL);
112 if (bgmac->core->id.rev >= 4) {
113 ctl &= ~BGMAC_DMA_TX_BL_MASK;
114 ctl |= BGMAC_DMA_TX_BL_128 << BGMAC_DMA_TX_BL_SHIFT;
115
116 ctl &= ~BGMAC_DMA_TX_MR_MASK;
117 ctl |= BGMAC_DMA_TX_MR_2 << BGMAC_DMA_TX_MR_SHIFT;
118
119 ctl &= ~BGMAC_DMA_TX_PC_MASK;
120 ctl |= BGMAC_DMA_TX_PC_16 << BGMAC_DMA_TX_PC_SHIFT;
121
122 ctl &= ~BGMAC_DMA_TX_PT_MASK;
123 ctl |= BGMAC_DMA_TX_PT_8 << BGMAC_DMA_TX_PT_SHIFT;
124 }
125 ctl |= BGMAC_DMA_TX_ENABLE;
126 ctl |= BGMAC_DMA_TX_PARITY_DISABLE;
127 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_CTL, ctl);
128 }
129
130 static void
131 bgmac_dma_tx_add_buf(struct bgmac *bgmac, struct bgmac_dma_ring *ring,
132 int i, int len, u32 ctl0)
133 {
134 struct bgmac_slot_info *slot;
135 struct bgmac_dma_desc *dma_desc;
136 u32 ctl1;
137
138 if (i == BGMAC_TX_RING_SLOTS - 1)
139 ctl0 |= BGMAC_DESC_CTL0_EOT;
140
141 ctl1 = len & BGMAC_DESC_CTL1_LEN;
142
143 slot = &ring->slots[i];
144 dma_desc = &ring->cpu_base[i];
145 dma_desc->addr_low = cpu_to_le32(lower_32_bits(slot->dma_addr));
146 dma_desc->addr_high = cpu_to_le32(upper_32_bits(slot->dma_addr));
147 dma_desc->ctl0 = cpu_to_le32(ctl0);
148 dma_desc->ctl1 = cpu_to_le32(ctl1);
149 }
150
151 static netdev_tx_t bgmac_dma_tx_add(struct bgmac *bgmac,
152 struct bgmac_dma_ring *ring,
153 struct sk_buff *skb)
154 {
155 struct device *dma_dev = bgmac->core->dma_dev;
156 struct net_device *net_dev = bgmac->net_dev;
157 int index = ring->end % BGMAC_TX_RING_SLOTS;
158 struct bgmac_slot_info *slot = &ring->slots[index];
159 int nr_frags;
160 u32 flags;
161 int i;
162
163 if (skb->len > BGMAC_DESC_CTL1_LEN) {
164 bgmac_err(bgmac, "Too long skb (%d)\n", skb->len);
165 goto err_drop;
166 }
167
168 if (skb->ip_summed == CHECKSUM_PARTIAL)
169 skb_checksum_help(skb);
170
171 nr_frags = skb_shinfo(skb)->nr_frags;
172
173 /* ring->end - ring->start will return the number of valid slots,
174 * even when ring->end overflows
175 */
176 if (ring->end - ring->start + nr_frags + 1 >= BGMAC_TX_RING_SLOTS) {
177 bgmac_err(bgmac, "TX ring is full, queue should be stopped!\n");
178 netif_stop_queue(net_dev);
179 return NETDEV_TX_BUSY;
180 }
181
182 slot->dma_addr = dma_map_single(dma_dev, skb->data, skb_headlen(skb),
183 DMA_TO_DEVICE);
184 if (unlikely(dma_mapping_error(dma_dev, slot->dma_addr)))
185 goto err_dma_head;
186
187 flags = BGMAC_DESC_CTL0_SOF;
188 if (!nr_frags)
189 flags |= BGMAC_DESC_CTL0_EOF | BGMAC_DESC_CTL0_IOC;
190
191 bgmac_dma_tx_add_buf(bgmac, ring, index, skb_headlen(skb), flags);
192 flags = 0;
193
194 for (i = 0; i < nr_frags; i++) {
195 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i];
196 int len = skb_frag_size(frag);
197
198 index = (index + 1) % BGMAC_TX_RING_SLOTS;
199 slot = &ring->slots[index];
200 slot->dma_addr = skb_frag_dma_map(dma_dev, frag, 0,
201 len, DMA_TO_DEVICE);
202 if (unlikely(dma_mapping_error(dma_dev, slot->dma_addr)))
203 goto err_dma;
204
205 if (i == nr_frags - 1)
206 flags |= BGMAC_DESC_CTL0_EOF | BGMAC_DESC_CTL0_IOC;
207
208 bgmac_dma_tx_add_buf(bgmac, ring, index, len, flags);
209 }
210
211 slot->skb = skb;
212 ring->end += nr_frags + 1;
213 netdev_sent_queue(net_dev, skb->len);
214
215 wmb();
216
217 /* Increase ring->end to point empty slot. We tell hardware the first
218 * slot it should *not* read.
219 */
220 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_INDEX,
221 ring->index_base +
222 (ring->end % BGMAC_TX_RING_SLOTS) *
223 sizeof(struct bgmac_dma_desc));
224
225 if (ring->end - ring->start >= BGMAC_TX_RING_SLOTS - 8)
226 netif_stop_queue(net_dev);
227
228 return NETDEV_TX_OK;
229
230 err_dma:
231 dma_unmap_single(dma_dev, slot->dma_addr, skb_headlen(skb),
232 DMA_TO_DEVICE);
233
234 while (i > 0) {
235 int index = (ring->end + i) % BGMAC_TX_RING_SLOTS;
236 struct bgmac_slot_info *slot = &ring->slots[index];
237 u32 ctl1 = le32_to_cpu(ring->cpu_base[index].ctl1);
238 int len = ctl1 & BGMAC_DESC_CTL1_LEN;
239
240 dma_unmap_page(dma_dev, slot->dma_addr, len, DMA_TO_DEVICE);
241 }
242
243 err_dma_head:
244 bgmac_err(bgmac, "Mapping error of skb on ring 0x%X\n",
245 ring->mmio_base);
246
247 err_drop:
248 dev_kfree_skb(skb);
249 net_dev->stats.tx_dropped++;
250 net_dev->stats.tx_errors++;
251 return NETDEV_TX_OK;
252 }
253
254 /* Free transmitted packets */
255 static void bgmac_dma_tx_free(struct bgmac *bgmac, struct bgmac_dma_ring *ring)
256 {
257 struct device *dma_dev = bgmac->core->dma_dev;
258 int empty_slot;
259 bool freed = false;
260 unsigned bytes_compl = 0, pkts_compl = 0;
261
262 /* The last slot that hardware didn't consume yet */
263 empty_slot = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_STATUS);
264 empty_slot &= BGMAC_DMA_TX_STATDPTR;
265 empty_slot -= ring->index_base;
266 empty_slot &= BGMAC_DMA_TX_STATDPTR;
267 empty_slot /= sizeof(struct bgmac_dma_desc);
268
269 while (ring->start != ring->end) {
270 int slot_idx = ring->start % BGMAC_TX_RING_SLOTS;
271 struct bgmac_slot_info *slot = &ring->slots[slot_idx];
272 u32 ctl1;
273 int len;
274
275 if (slot_idx == empty_slot)
276 break;
277
278 ctl1 = le32_to_cpu(ring->cpu_base[slot_idx].ctl1);
279 len = ctl1 & BGMAC_DESC_CTL1_LEN;
280 if (ctl1 & BGMAC_DESC_CTL0_SOF)
281 /* Unmap no longer used buffer */
282 dma_unmap_single(dma_dev, slot->dma_addr, len,
283 DMA_TO_DEVICE);
284 else
285 dma_unmap_page(dma_dev, slot->dma_addr, len,
286 DMA_TO_DEVICE);
287
288 if (slot->skb) {
289 bgmac->net_dev->stats.tx_bytes += slot->skb->len;
290 bgmac->net_dev->stats.tx_packets++;
291 bytes_compl += slot->skb->len;
292 pkts_compl++;
293
294 /* Free memory! :) */
295 dev_kfree_skb(slot->skb);
296 slot->skb = NULL;
297 }
298
299 slot->dma_addr = 0;
300 ring->start++;
301 freed = true;
302 }
303
304 if (!pkts_compl)
305 return;
306
307 netdev_completed_queue(bgmac->net_dev, pkts_compl, bytes_compl);
308
309 if (netif_queue_stopped(bgmac->net_dev))
310 netif_wake_queue(bgmac->net_dev);
311 }
312
313 static void bgmac_dma_rx_reset(struct bgmac *bgmac, struct bgmac_dma_ring *ring)
314 {
315 if (!ring->mmio_base)
316 return;
317
318 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_CTL, 0);
319 if (!bgmac_wait_value(bgmac->core,
320 ring->mmio_base + BGMAC_DMA_RX_STATUS,
321 BGMAC_DMA_RX_STAT, BGMAC_DMA_RX_STAT_DISABLED,
322 10000))
323 bgmac_err(bgmac, "Reset of ring 0x%X RX failed\n",
324 ring->mmio_base);
325 }
326
327 static void bgmac_dma_rx_enable(struct bgmac *bgmac,
328 struct bgmac_dma_ring *ring)
329 {
330 u32 ctl;
331
332 ctl = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_RX_CTL);
333 if (bgmac->core->id.rev >= 4) {
334 ctl &= ~BGMAC_DMA_RX_BL_MASK;
335 ctl |= BGMAC_DMA_RX_BL_128 << BGMAC_DMA_RX_BL_SHIFT;
336
337 ctl &= ~BGMAC_DMA_RX_PC_MASK;
338 ctl |= BGMAC_DMA_RX_PC_8 << BGMAC_DMA_RX_PC_SHIFT;
339
340 ctl &= ~BGMAC_DMA_RX_PT_MASK;
341 ctl |= BGMAC_DMA_RX_PT_1 << BGMAC_DMA_RX_PT_SHIFT;
342 }
343 ctl &= BGMAC_DMA_RX_ADDREXT_MASK;
344 ctl |= BGMAC_DMA_RX_ENABLE;
345 ctl |= BGMAC_DMA_RX_PARITY_DISABLE;
346 ctl |= BGMAC_DMA_RX_OVERFLOW_CONT;
347 ctl |= BGMAC_RX_FRAME_OFFSET << BGMAC_DMA_RX_FRAME_OFFSET_SHIFT;
348 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_CTL, ctl);
349 }
350
351 static int bgmac_dma_rx_skb_for_slot(struct bgmac *bgmac,
352 struct bgmac_slot_info *slot)
353 {
354 struct device *dma_dev = bgmac->core->dma_dev;
355 dma_addr_t dma_addr;
356 struct bgmac_rx_header *rx;
357 void *buf;
358
359 /* Alloc skb */
360 buf = netdev_alloc_frag(BGMAC_RX_ALLOC_SIZE);
361 if (!buf)
362 return -ENOMEM;
363
364 /* Poison - if everything goes fine, hardware will overwrite it */
365 rx = buf + BGMAC_RX_BUF_OFFSET;
366 rx->len = cpu_to_le16(0xdead);
367 rx->flags = cpu_to_le16(0xbeef);
368
369 /* Map skb for the DMA */
370 dma_addr = dma_map_single(dma_dev, buf + BGMAC_RX_BUF_OFFSET,
371 BGMAC_RX_BUF_SIZE, DMA_FROM_DEVICE);
372 if (dma_mapping_error(dma_dev, dma_addr)) {
373 bgmac_err(bgmac, "DMA mapping error\n");
374 put_page(virt_to_head_page(buf));
375 return -ENOMEM;
376 }
377
378 /* Update the slot */
379 slot->buf = buf;
380 slot->dma_addr = dma_addr;
381
382 return 0;
383 }
384
385 static void bgmac_dma_rx_update_index(struct bgmac *bgmac,
386 struct bgmac_dma_ring *ring)
387 {
388 dma_wmb();
389
390 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_INDEX,
391 ring->index_base +
392 ring->end * sizeof(struct bgmac_dma_desc));
393 }
394
395 static void bgmac_dma_rx_setup_desc(struct bgmac *bgmac,
396 struct bgmac_dma_ring *ring, int desc_idx)
397 {
398 struct bgmac_dma_desc *dma_desc = ring->cpu_base + desc_idx;
399 u32 ctl0 = 0, ctl1 = 0;
400
401 if (desc_idx == BGMAC_RX_RING_SLOTS - 1)
402 ctl0 |= BGMAC_DESC_CTL0_EOT;
403 ctl1 |= BGMAC_RX_BUF_SIZE & BGMAC_DESC_CTL1_LEN;
404 /* Is there any BGMAC device that requires extension? */
405 /* ctl1 |= (addrext << B43_DMA64_DCTL1_ADDREXT_SHIFT) &
406 * B43_DMA64_DCTL1_ADDREXT_MASK;
407 */
408
409 dma_desc->addr_low = cpu_to_le32(lower_32_bits(ring->slots[desc_idx].dma_addr));
410 dma_desc->addr_high = cpu_to_le32(upper_32_bits(ring->slots[desc_idx].dma_addr));
411 dma_desc->ctl0 = cpu_to_le32(ctl0);
412 dma_desc->ctl1 = cpu_to_le32(ctl1);
413
414 ring->end = desc_idx;
415 }
416
417 static void bgmac_dma_rx_poison_buf(struct device *dma_dev,
418 struct bgmac_slot_info *slot)
419 {
420 struct bgmac_rx_header *rx = slot->buf + BGMAC_RX_BUF_OFFSET;
421
422 dma_sync_single_for_cpu(dma_dev, slot->dma_addr, BGMAC_RX_BUF_SIZE,
423 DMA_FROM_DEVICE);
424 rx->len = cpu_to_le16(0xdead);
425 rx->flags = cpu_to_le16(0xbeef);
426 dma_sync_single_for_device(dma_dev, slot->dma_addr, BGMAC_RX_BUF_SIZE,
427 DMA_FROM_DEVICE);
428 }
429
430 static int bgmac_dma_rx_read(struct bgmac *bgmac, struct bgmac_dma_ring *ring,
431 int weight)
432 {
433 u32 end_slot;
434 int handled = 0;
435
436 end_slot = bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_RX_STATUS);
437 end_slot &= BGMAC_DMA_RX_STATDPTR;
438 end_slot -= ring->index_base;
439 end_slot &= BGMAC_DMA_RX_STATDPTR;
440 end_slot /= sizeof(struct bgmac_dma_desc);
441
442 while (ring->start != end_slot) {
443 struct device *dma_dev = bgmac->core->dma_dev;
444 struct bgmac_slot_info *slot = &ring->slots[ring->start];
445 struct bgmac_rx_header *rx = slot->buf + BGMAC_RX_BUF_OFFSET;
446 struct sk_buff *skb;
447 void *buf = slot->buf;
448 dma_addr_t dma_addr = slot->dma_addr;
449 u16 len, flags;
450
451 do {
452 /* Prepare new skb as replacement */
453 if (bgmac_dma_rx_skb_for_slot(bgmac, slot)) {
454 bgmac_dma_rx_poison_buf(dma_dev, slot);
455 break;
456 }
457
458 /* Unmap buffer to make it accessible to the CPU */
459 dma_unmap_single(dma_dev, dma_addr,
460 BGMAC_RX_BUF_SIZE, DMA_FROM_DEVICE);
461
462 /* Get info from the header */
463 len = le16_to_cpu(rx->len);
464 flags = le16_to_cpu(rx->flags);
465
466 /* Check for poison and drop or pass the packet */
467 if (len == 0xdead && flags == 0xbeef) {
468 bgmac_err(bgmac, "Found poisoned packet at slot %d, DMA issue!\n",
469 ring->start);
470 put_page(virt_to_head_page(buf));
471 bgmac->net_dev->stats.rx_errors++;
472 break;
473 }
474
475 if (len > BGMAC_RX_ALLOC_SIZE) {
476 bgmac_err(bgmac, "Found oversized packet at slot %d, DMA issue!\n",
477 ring->start);
478 put_page(virt_to_head_page(buf));
479 bgmac->net_dev->stats.rx_length_errors++;
480 bgmac->net_dev->stats.rx_errors++;
481 break;
482 }
483
484 /* Omit CRC. */
485 len -= ETH_FCS_LEN;
486
487 skb = build_skb(buf, BGMAC_RX_ALLOC_SIZE);
488 if (unlikely(!skb)) {
489 bgmac_err(bgmac, "build_skb failed\n");
490 put_page(virt_to_head_page(buf));
491 bgmac->net_dev->stats.rx_errors++;
492 break;
493 }
494 skb_put(skb, BGMAC_RX_FRAME_OFFSET +
495 BGMAC_RX_BUF_OFFSET + len);
496 skb_pull(skb, BGMAC_RX_FRAME_OFFSET +
497 BGMAC_RX_BUF_OFFSET);
498
499 skb_checksum_none_assert(skb);
500 skb->protocol = eth_type_trans(skb, bgmac->net_dev);
501 bgmac->net_dev->stats.rx_bytes += len;
502 bgmac->net_dev->stats.rx_packets++;
503 napi_gro_receive(&bgmac->napi, skb);
504 handled++;
505 } while (0);
506
507 bgmac_dma_rx_setup_desc(bgmac, ring, ring->start);
508
509 if (++ring->start >= BGMAC_RX_RING_SLOTS)
510 ring->start = 0;
511
512 if (handled >= weight) /* Should never be greater */
513 break;
514 }
515
516 bgmac_dma_rx_update_index(bgmac, ring);
517
518 return handled;
519 }
520
521 /* Does ring support unaligned addressing? */
522 static bool bgmac_dma_unaligned(struct bgmac *bgmac,
523 struct bgmac_dma_ring *ring,
524 enum bgmac_dma_ring_type ring_type)
525 {
526 switch (ring_type) {
527 case BGMAC_DMA_RING_TX:
528 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_RINGLO,
529 0xff0);
530 if (bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_TX_RINGLO))
531 return true;
532 break;
533 case BGMAC_DMA_RING_RX:
534 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_RINGLO,
535 0xff0);
536 if (bgmac_read(bgmac, ring->mmio_base + BGMAC_DMA_RX_RINGLO))
537 return true;
538 break;
539 }
540 return false;
541 }
542
543 static void bgmac_dma_tx_ring_free(struct bgmac *bgmac,
544 struct bgmac_dma_ring *ring)
545 {
546 struct device *dma_dev = bgmac->core->dma_dev;
547 struct bgmac_dma_desc *dma_desc = ring->cpu_base;
548 struct bgmac_slot_info *slot;
549 int i;
550
551 for (i = 0; i < BGMAC_TX_RING_SLOTS; i++) {
552 int len = dma_desc[i].ctl1 & BGMAC_DESC_CTL1_LEN;
553
554 slot = &ring->slots[i];
555 dev_kfree_skb(slot->skb);
556
557 if (!slot->dma_addr)
558 continue;
559
560 if (slot->skb)
561 dma_unmap_single(dma_dev, slot->dma_addr,
562 len, DMA_TO_DEVICE);
563 else
564 dma_unmap_page(dma_dev, slot->dma_addr,
565 len, DMA_TO_DEVICE);
566 }
567 }
568
569 static void bgmac_dma_rx_ring_free(struct bgmac *bgmac,
570 struct bgmac_dma_ring *ring)
571 {
572 struct device *dma_dev = bgmac->core->dma_dev;
573 struct bgmac_slot_info *slot;
574 int i;
575
576 for (i = 0; i < BGMAC_RX_RING_SLOTS; i++) {
577 slot = &ring->slots[i];
578 if (!slot->dma_addr)
579 continue;
580
581 dma_unmap_single(dma_dev, slot->dma_addr,
582 BGMAC_RX_BUF_SIZE,
583 DMA_FROM_DEVICE);
584 put_page(virt_to_head_page(slot->buf));
585 slot->dma_addr = 0;
586 }
587 }
588
589 static void bgmac_dma_ring_desc_free(struct bgmac *bgmac,
590 struct bgmac_dma_ring *ring,
591 int num_slots)
592 {
593 struct device *dma_dev = bgmac->core->dma_dev;
594 int size;
595
596 if (!ring->cpu_base)
597 return;
598
599 /* Free ring of descriptors */
600 size = num_slots * sizeof(struct bgmac_dma_desc);
601 dma_free_coherent(dma_dev, size, ring->cpu_base,
602 ring->dma_base);
603 }
604
605 static void bgmac_dma_cleanup(struct bgmac *bgmac)
606 {
607 int i;
608
609 for (i = 0; i < BGMAC_MAX_TX_RINGS; i++)
610 bgmac_dma_tx_ring_free(bgmac, &bgmac->tx_ring[i]);
611
612 for (i = 0; i < BGMAC_MAX_RX_RINGS; i++)
613 bgmac_dma_rx_ring_free(bgmac, &bgmac->rx_ring[i]);
614 }
615
616 static void bgmac_dma_free(struct bgmac *bgmac)
617 {
618 int i;
619
620 for (i = 0; i < BGMAC_MAX_TX_RINGS; i++)
621 bgmac_dma_ring_desc_free(bgmac, &bgmac->tx_ring[i],
622 BGMAC_TX_RING_SLOTS);
623
624 for (i = 0; i < BGMAC_MAX_RX_RINGS; i++)
625 bgmac_dma_ring_desc_free(bgmac, &bgmac->rx_ring[i],
626 BGMAC_RX_RING_SLOTS);
627 }
628
629 static int bgmac_dma_alloc(struct bgmac *bgmac)
630 {
631 struct device *dma_dev = bgmac->core->dma_dev;
632 struct bgmac_dma_ring *ring;
633 static const u16 ring_base[] = { BGMAC_DMA_BASE0, BGMAC_DMA_BASE1,
634 BGMAC_DMA_BASE2, BGMAC_DMA_BASE3, };
635 int size; /* ring size: different for Tx and Rx */
636 int err;
637 int i;
638
639 BUILD_BUG_ON(BGMAC_MAX_TX_RINGS > ARRAY_SIZE(ring_base));
640 BUILD_BUG_ON(BGMAC_MAX_RX_RINGS > ARRAY_SIZE(ring_base));
641
642 if (!(bcma_aread32(bgmac->core, BCMA_IOST) & BCMA_IOST_DMA64)) {
643 bgmac_err(bgmac, "Core does not report 64-bit DMA\n");
644 return -ENOTSUPP;
645 }
646
647 for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) {
648 ring = &bgmac->tx_ring[i];
649 ring->mmio_base = ring_base[i];
650
651 /* Alloc ring of descriptors */
652 size = BGMAC_TX_RING_SLOTS * sizeof(struct bgmac_dma_desc);
653 ring->cpu_base = dma_zalloc_coherent(dma_dev, size,
654 &ring->dma_base,
655 GFP_KERNEL);
656 if (!ring->cpu_base) {
657 bgmac_err(bgmac, "Allocation of TX ring 0x%X failed\n",
658 ring->mmio_base);
659 goto err_dma_free;
660 }
661
662 ring->unaligned = bgmac_dma_unaligned(bgmac, ring,
663 BGMAC_DMA_RING_TX);
664 if (ring->unaligned)
665 ring->index_base = lower_32_bits(ring->dma_base);
666 else
667 ring->index_base = 0;
668
669 /* No need to alloc TX slots yet */
670 }
671
672 for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) {
673 ring = &bgmac->rx_ring[i];
674 ring->mmio_base = ring_base[i];
675
676 /* Alloc ring of descriptors */
677 size = BGMAC_RX_RING_SLOTS * sizeof(struct bgmac_dma_desc);
678 ring->cpu_base = dma_zalloc_coherent(dma_dev, size,
679 &ring->dma_base,
680 GFP_KERNEL);
681 if (!ring->cpu_base) {
682 bgmac_err(bgmac, "Allocation of RX ring 0x%X failed\n",
683 ring->mmio_base);
684 err = -ENOMEM;
685 goto err_dma_free;
686 }
687
688 ring->unaligned = bgmac_dma_unaligned(bgmac, ring,
689 BGMAC_DMA_RING_RX);
690 if (ring->unaligned)
691 ring->index_base = lower_32_bits(ring->dma_base);
692 else
693 ring->index_base = 0;
694 }
695
696 return 0;
697
698 err_dma_free:
699 bgmac_dma_free(bgmac);
700 return -ENOMEM;
701 }
702
703 static int bgmac_dma_init(struct bgmac *bgmac)
704 {
705 struct bgmac_dma_ring *ring;
706 int i, err;
707
708 for (i = 0; i < BGMAC_MAX_TX_RINGS; i++) {
709 ring = &bgmac->tx_ring[i];
710
711 if (!ring->unaligned)
712 bgmac_dma_tx_enable(bgmac, ring);
713 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_RINGLO,
714 lower_32_bits(ring->dma_base));
715 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_TX_RINGHI,
716 upper_32_bits(ring->dma_base));
717 if (ring->unaligned)
718 bgmac_dma_tx_enable(bgmac, ring);
719
720 ring->start = 0;
721 ring->end = 0; /* Points the slot that should *not* be read */
722 }
723
724 for (i = 0; i < BGMAC_MAX_RX_RINGS; i++) {
725 int j;
726
727 ring = &bgmac->rx_ring[i];
728
729 if (!ring->unaligned)
730 bgmac_dma_rx_enable(bgmac, ring);
731 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_RINGLO,
732 lower_32_bits(ring->dma_base));
733 bgmac_write(bgmac, ring->mmio_base + BGMAC_DMA_RX_RINGHI,
734 upper_32_bits(ring->dma_base));
735 if (ring->unaligned)
736 bgmac_dma_rx_enable(bgmac, ring);
737
738 ring->start = 0;
739 ring->end = 0;
740 for (j = 0; j < BGMAC_RX_RING_SLOTS; j++) {
741 err = bgmac_dma_rx_skb_for_slot(bgmac, &ring->slots[j]);
742 if (err)
743 goto error;
744
745 bgmac_dma_rx_setup_desc(bgmac, ring, j);
746 }
747
748 bgmac_dma_rx_update_index(bgmac, ring);
749 }
750
751 return 0;
752
753 error:
754 bgmac_dma_cleanup(bgmac);
755 return err;
756 }
757
758 /**************************************************
759 * PHY ops
760 **************************************************/
761
762 static u16 bgmac_phy_read(struct bgmac *bgmac, u8 phyaddr, u8 reg)
763 {
764 struct bcma_device *core;
765 u16 phy_access_addr;
766 u16 phy_ctl_addr;
767 u32 tmp;
768
769 BUILD_BUG_ON(BGMAC_PA_DATA_MASK != BCMA_GMAC_CMN_PA_DATA_MASK);
770 BUILD_BUG_ON(BGMAC_PA_ADDR_MASK != BCMA_GMAC_CMN_PA_ADDR_MASK);
771 BUILD_BUG_ON(BGMAC_PA_ADDR_SHIFT != BCMA_GMAC_CMN_PA_ADDR_SHIFT);
772 BUILD_BUG_ON(BGMAC_PA_REG_MASK != BCMA_GMAC_CMN_PA_REG_MASK);
773 BUILD_BUG_ON(BGMAC_PA_REG_SHIFT != BCMA_GMAC_CMN_PA_REG_SHIFT);
774 BUILD_BUG_ON(BGMAC_PA_WRITE != BCMA_GMAC_CMN_PA_WRITE);
775 BUILD_BUG_ON(BGMAC_PA_START != BCMA_GMAC_CMN_PA_START);
776 BUILD_BUG_ON(BGMAC_PC_EPA_MASK != BCMA_GMAC_CMN_PC_EPA_MASK);
777 BUILD_BUG_ON(BGMAC_PC_MCT_MASK != BCMA_GMAC_CMN_PC_MCT_MASK);
778 BUILD_BUG_ON(BGMAC_PC_MCT_SHIFT != BCMA_GMAC_CMN_PC_MCT_SHIFT);
779 BUILD_BUG_ON(BGMAC_PC_MTE != BCMA_GMAC_CMN_PC_MTE);
780
781 if (bgmac->core->id.id == BCMA_CORE_4706_MAC_GBIT) {
782 core = bgmac->core->bus->drv_gmac_cmn.core;
783 phy_access_addr = BCMA_GMAC_CMN_PHY_ACCESS;
784 phy_ctl_addr = BCMA_GMAC_CMN_PHY_CTL;
785 } else {
786 core = bgmac->core;
787 phy_access_addr = BGMAC_PHY_ACCESS;
788 phy_ctl_addr = BGMAC_PHY_CNTL;
789 }
790
791 tmp = bcma_read32(core, phy_ctl_addr);
792 tmp &= ~BGMAC_PC_EPA_MASK;
793 tmp |= phyaddr;
794 bcma_write32(core, phy_ctl_addr, tmp);
795
796 tmp = BGMAC_PA_START;
797 tmp |= phyaddr << BGMAC_PA_ADDR_SHIFT;
798 tmp |= reg << BGMAC_PA_REG_SHIFT;
799 bcma_write32(core, phy_access_addr, tmp);
800
801 if (!bgmac_wait_value(core, phy_access_addr, BGMAC_PA_START, 0, 1000)) {
802 bgmac_err(bgmac, "Reading PHY %d register 0x%X failed\n",
803 phyaddr, reg);
804 return 0xffff;
805 }
806
807 return bcma_read32(core, phy_access_addr) & BGMAC_PA_DATA_MASK;
808 }
809
810 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipphywr */
811 static int bgmac_phy_write(struct bgmac *bgmac, u8 phyaddr, u8 reg, u16 value)
812 {
813 struct bcma_device *core;
814 u16 phy_access_addr;
815 u16 phy_ctl_addr;
816 u32 tmp;
817
818 if (bgmac->core->id.id == BCMA_CORE_4706_MAC_GBIT) {
819 core = bgmac->core->bus->drv_gmac_cmn.core;
820 phy_access_addr = BCMA_GMAC_CMN_PHY_ACCESS;
821 phy_ctl_addr = BCMA_GMAC_CMN_PHY_CTL;
822 } else {
823 core = bgmac->core;
824 phy_access_addr = BGMAC_PHY_ACCESS;
825 phy_ctl_addr = BGMAC_PHY_CNTL;
826 }
827
828 tmp = bcma_read32(core, phy_ctl_addr);
829 tmp &= ~BGMAC_PC_EPA_MASK;
830 tmp |= phyaddr;
831 bcma_write32(core, phy_ctl_addr, tmp);
832
833 bgmac_write(bgmac, BGMAC_INT_STATUS, BGMAC_IS_MDIO);
834 if (bgmac_read(bgmac, BGMAC_INT_STATUS) & BGMAC_IS_MDIO)
835 bgmac_warn(bgmac, "Error setting MDIO int\n");
836
837 tmp = BGMAC_PA_START;
838 tmp |= BGMAC_PA_WRITE;
839 tmp |= phyaddr << BGMAC_PA_ADDR_SHIFT;
840 tmp |= reg << BGMAC_PA_REG_SHIFT;
841 tmp |= value;
842 bcma_write32(core, phy_access_addr, tmp);
843
844 if (!bgmac_wait_value(core, phy_access_addr, BGMAC_PA_START, 0, 1000)) {
845 bgmac_err(bgmac, "Writing to PHY %d register 0x%X failed\n",
846 phyaddr, reg);
847 return -ETIMEDOUT;
848 }
849
850 return 0;
851 }
852
853 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipphyinit */
854 static void bgmac_phy_init(struct bgmac *bgmac)
855 {
856 struct bcma_chipinfo *ci = &bgmac->core->bus->chipinfo;
857 struct bcma_drv_cc *cc = &bgmac->core->bus->drv_cc;
858 u8 i;
859
860 if (ci->id == BCMA_CHIP_ID_BCM5356) {
861 for (i = 0; i < 5; i++) {
862 bgmac_phy_write(bgmac, i, 0x1f, 0x008b);
863 bgmac_phy_write(bgmac, i, 0x15, 0x0100);
864 bgmac_phy_write(bgmac, i, 0x1f, 0x000f);
865 bgmac_phy_write(bgmac, i, 0x12, 0x2aaa);
866 bgmac_phy_write(bgmac, i, 0x1f, 0x000b);
867 }
868 }
869 if ((ci->id == BCMA_CHIP_ID_BCM5357 && ci->pkg != 10) ||
870 (ci->id == BCMA_CHIP_ID_BCM4749 && ci->pkg != 10) ||
871 (ci->id == BCMA_CHIP_ID_BCM53572 && ci->pkg != 9)) {
872 bcma_chipco_chipctl_maskset(cc, 2, ~0xc0000000, 0);
873 bcma_chipco_chipctl_maskset(cc, 4, ~0x80000000, 0);
874 for (i = 0; i < 5; i++) {
875 bgmac_phy_write(bgmac, i, 0x1f, 0x000f);
876 bgmac_phy_write(bgmac, i, 0x16, 0x5284);
877 bgmac_phy_write(bgmac, i, 0x1f, 0x000b);
878 bgmac_phy_write(bgmac, i, 0x17, 0x0010);
879 bgmac_phy_write(bgmac, i, 0x1f, 0x000f);
880 bgmac_phy_write(bgmac, i, 0x16, 0x5296);
881 bgmac_phy_write(bgmac, i, 0x17, 0x1073);
882 bgmac_phy_write(bgmac, i, 0x17, 0x9073);
883 bgmac_phy_write(bgmac, i, 0x16, 0x52b6);
884 bgmac_phy_write(bgmac, i, 0x17, 0x9273);
885 bgmac_phy_write(bgmac, i, 0x1f, 0x000b);
886 }
887 }
888 }
889
890 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipphyreset */
891 static void bgmac_phy_reset(struct bgmac *bgmac)
892 {
893 if (bgmac->phyaddr == BGMAC_PHY_NOREGS)
894 return;
895
896 bgmac_phy_write(bgmac, bgmac->phyaddr, MII_BMCR, BMCR_RESET);
897 udelay(100);
898 if (bgmac_phy_read(bgmac, bgmac->phyaddr, MII_BMCR) & BMCR_RESET)
899 bgmac_err(bgmac, "PHY reset failed\n");
900 bgmac_phy_init(bgmac);
901 }
902
903 /**************************************************
904 * Chip ops
905 **************************************************/
906
907 /* TODO: can we just drop @force? Can we don't reset MAC at all if there is
908 * nothing to change? Try if after stabilizng driver.
909 */
910 static void bgmac_cmdcfg_maskset(struct bgmac *bgmac, u32 mask, u32 set,
911 bool force)
912 {
913 u32 cmdcfg = bgmac_read(bgmac, BGMAC_CMDCFG);
914 u32 new_val = (cmdcfg & mask) | set;
915
916 bgmac_set(bgmac, BGMAC_CMDCFG, BGMAC_CMDCFG_SR(bgmac->core->id.rev));
917 udelay(2);
918
919 if (new_val != cmdcfg || force)
920 bgmac_write(bgmac, BGMAC_CMDCFG, new_val);
921
922 bgmac_mask(bgmac, BGMAC_CMDCFG, ~BGMAC_CMDCFG_SR(bgmac->core->id.rev));
923 udelay(2);
924 }
925
926 static void bgmac_write_mac_address(struct bgmac *bgmac, u8 *addr)
927 {
928 u32 tmp;
929
930 tmp = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3];
931 bgmac_write(bgmac, BGMAC_MACADDR_HIGH, tmp);
932 tmp = (addr[4] << 8) | addr[5];
933 bgmac_write(bgmac, BGMAC_MACADDR_LOW, tmp);
934 }
935
936 static void bgmac_set_rx_mode(struct net_device *net_dev)
937 {
938 struct bgmac *bgmac = netdev_priv(net_dev);
939
940 if (net_dev->flags & IFF_PROMISC)
941 bgmac_cmdcfg_maskset(bgmac, ~0, BGMAC_CMDCFG_PROM, true);
942 else
943 bgmac_cmdcfg_maskset(bgmac, ~BGMAC_CMDCFG_PROM, 0, true);
944 }
945
946 #if 0 /* We don't use that regs yet */
947 static void bgmac_chip_stats_update(struct bgmac *bgmac)
948 {
949 int i;
950
951 if (bgmac->core->id.id != BCMA_CORE_4706_MAC_GBIT) {
952 for (i = 0; i < BGMAC_NUM_MIB_TX_REGS; i++)
953 bgmac->mib_tx_regs[i] =
954 bgmac_read(bgmac,
955 BGMAC_TX_GOOD_OCTETS + (i * 4));
956 for (i = 0; i < BGMAC_NUM_MIB_RX_REGS; i++)
957 bgmac->mib_rx_regs[i] =
958 bgmac_read(bgmac,
959 BGMAC_RX_GOOD_OCTETS + (i * 4));
960 }
961
962 /* TODO: what else? how to handle BCM4706? Specs are needed */
963 }
964 #endif
965
966 static void bgmac_clear_mib(struct bgmac *bgmac)
967 {
968 int i;
969
970 if (bgmac->core->id.id == BCMA_CORE_4706_MAC_GBIT)
971 return;
972
973 bgmac_set(bgmac, BGMAC_DEV_CTL, BGMAC_DC_MROR);
974 for (i = 0; i < BGMAC_NUM_MIB_TX_REGS; i++)
975 bgmac_read(bgmac, BGMAC_TX_GOOD_OCTETS + (i * 4));
976 for (i = 0; i < BGMAC_NUM_MIB_RX_REGS; i++)
977 bgmac_read(bgmac, BGMAC_RX_GOOD_OCTETS + (i * 4));
978 }
979
980 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/gmac_speed */
981 static void bgmac_mac_speed(struct bgmac *bgmac)
982 {
983 u32 mask = ~(BGMAC_CMDCFG_ES_MASK | BGMAC_CMDCFG_HD);
984 u32 set = 0;
985
986 switch (bgmac->mac_speed) {
987 case SPEED_10:
988 set |= BGMAC_CMDCFG_ES_10;
989 break;
990 case SPEED_100:
991 set |= BGMAC_CMDCFG_ES_100;
992 break;
993 case SPEED_1000:
994 set |= BGMAC_CMDCFG_ES_1000;
995 break;
996 case SPEED_2500:
997 set |= BGMAC_CMDCFG_ES_2500;
998 break;
999 default:
1000 bgmac_err(bgmac, "Unsupported speed: %d\n", bgmac->mac_speed);
1001 }
1002
1003 if (bgmac->mac_duplex == DUPLEX_HALF)
1004 set |= BGMAC_CMDCFG_HD;
1005
1006 bgmac_cmdcfg_maskset(bgmac, mask, set, true);
1007 }
1008
1009 static void bgmac_miiconfig(struct bgmac *bgmac)
1010 {
1011 struct bcma_device *core = bgmac->core;
1012 u8 imode;
1013
1014 if (bgmac_is_bcm4707_family(bgmac)) {
1015 bcma_awrite32(core, BCMA_IOCTL,
1016 bcma_aread32(core, BCMA_IOCTL) | 0x40 |
1017 BGMAC_BCMA_IOCTL_SW_CLKEN);
1018 bgmac->mac_speed = SPEED_2500;
1019 bgmac->mac_duplex = DUPLEX_FULL;
1020 bgmac_mac_speed(bgmac);
1021 } else {
1022 imode = (bgmac_read(bgmac, BGMAC_DEV_STATUS) &
1023 BGMAC_DS_MM_MASK) >> BGMAC_DS_MM_SHIFT;
1024 if (imode == 0 || imode == 1) {
1025 bgmac->mac_speed = SPEED_100;
1026 bgmac->mac_duplex = DUPLEX_FULL;
1027 bgmac_mac_speed(bgmac);
1028 }
1029 }
1030 }
1031
1032 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipreset */
1033 static void bgmac_chip_reset(struct bgmac *bgmac)
1034 {
1035 struct bcma_device *core = bgmac->core;
1036 struct bcma_bus *bus = core->bus;
1037 struct bcma_chipinfo *ci = &bus->chipinfo;
1038 u32 flags;
1039 u32 iost;
1040 int i;
1041
1042 if (bcma_core_is_enabled(core)) {
1043 if (!bgmac->stats_grabbed) {
1044 /* bgmac_chip_stats_update(bgmac); */
1045 bgmac->stats_grabbed = true;
1046 }
1047
1048 for (i = 0; i < BGMAC_MAX_TX_RINGS; i++)
1049 bgmac_dma_tx_reset(bgmac, &bgmac->tx_ring[i]);
1050
1051 bgmac_cmdcfg_maskset(bgmac, ~0, BGMAC_CMDCFG_ML, false);
1052 udelay(1);
1053
1054 for (i = 0; i < BGMAC_MAX_RX_RINGS; i++)
1055 bgmac_dma_rx_reset(bgmac, &bgmac->rx_ring[i]);
1056
1057 /* TODO: Clear software multicast filter list */
1058 }
1059
1060 iost = bcma_aread32(core, BCMA_IOST);
1061 if ((ci->id == BCMA_CHIP_ID_BCM5357 && ci->pkg == BCMA_PKG_ID_BCM47186) ||
1062 (ci->id == BCMA_CHIP_ID_BCM4749 && ci->pkg == 10) ||
1063 (ci->id == BCMA_CHIP_ID_BCM53572 && ci->pkg == BCMA_PKG_ID_BCM47188))
1064 iost &= ~BGMAC_BCMA_IOST_ATTACHED;
1065
1066 /* 3GMAC: for BCM4707 & BCM47094, only do core reset at bgmac_probe() */
1067 if (ci->id != BCMA_CHIP_ID_BCM4707 &&
1068 ci->id != BCMA_CHIP_ID_BCM47094) {
1069 flags = 0;
1070 if (iost & BGMAC_BCMA_IOST_ATTACHED) {
1071 flags = BGMAC_BCMA_IOCTL_SW_CLKEN;
1072 if (!bgmac->has_robosw)
1073 flags |= BGMAC_BCMA_IOCTL_SW_RESET;
1074 }
1075 bcma_core_enable(core, flags);
1076 }
1077
1078 /* Request Misc PLL for corerev > 2 */
1079 if (core->id.rev > 2 && !bgmac_is_bcm4707_family(bgmac)) {
1080 bgmac_set(bgmac, BCMA_CLKCTLST,
1081 BGMAC_BCMA_CLKCTLST_MISC_PLL_REQ);
1082 bgmac_wait_value(bgmac->core, BCMA_CLKCTLST,
1083 BGMAC_BCMA_CLKCTLST_MISC_PLL_ST,
1084 BGMAC_BCMA_CLKCTLST_MISC_PLL_ST,
1085 1000);
1086 }
1087
1088 if (ci->id == BCMA_CHIP_ID_BCM5357 ||
1089 ci->id == BCMA_CHIP_ID_BCM4749 ||
1090 ci->id == BCMA_CHIP_ID_BCM53572) {
1091 struct bcma_drv_cc *cc = &bgmac->core->bus->drv_cc;
1092 u8 et_swtype = 0;
1093 u8 sw_type = BGMAC_CHIPCTL_1_SW_TYPE_EPHY |
1094 BGMAC_CHIPCTL_1_IF_TYPE_MII;
1095 char buf[4];
1096
1097 if (bcm47xx_nvram_getenv("et_swtype", buf, sizeof(buf)) > 0) {
1098 if (kstrtou8(buf, 0, &et_swtype))
1099 bgmac_err(bgmac, "Failed to parse et_swtype (%s)\n",
1100 buf);
1101 et_swtype &= 0x0f;
1102 et_swtype <<= 4;
1103 sw_type = et_swtype;
1104 } else if (ci->id == BCMA_CHIP_ID_BCM5357 && ci->pkg == BCMA_PKG_ID_BCM5358) {
1105 sw_type = BGMAC_CHIPCTL_1_SW_TYPE_EPHYRMII;
1106 } else if ((ci->id == BCMA_CHIP_ID_BCM5357 && ci->pkg == BCMA_PKG_ID_BCM47186) ||
1107 (ci->id == BCMA_CHIP_ID_BCM4749 && ci->pkg == 10) ||
1108 (ci->id == BCMA_CHIP_ID_BCM53572 && ci->pkg == BCMA_PKG_ID_BCM47188)) {
1109 sw_type = BGMAC_CHIPCTL_1_IF_TYPE_RGMII |
1110 BGMAC_CHIPCTL_1_SW_TYPE_RGMII;
1111 }
1112 bcma_chipco_chipctl_maskset(cc, 1,
1113 ~(BGMAC_CHIPCTL_1_IF_TYPE_MASK |
1114 BGMAC_CHIPCTL_1_SW_TYPE_MASK),
1115 sw_type);
1116 }
1117
1118 if (iost & BGMAC_BCMA_IOST_ATTACHED && !bgmac->has_robosw)
1119 bcma_awrite32(core, BCMA_IOCTL,
1120 bcma_aread32(core, BCMA_IOCTL) &
1121 ~BGMAC_BCMA_IOCTL_SW_RESET);
1122
1123 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/gmac_reset
1124 * Specs don't say about using BGMAC_CMDCFG_SR, but in this routine
1125 * BGMAC_CMDCFG is read _after_ putting chip in a reset. So it has to
1126 * be keps until taking MAC out of the reset.
1127 */
1128 bgmac_cmdcfg_maskset(bgmac,
1129 ~(BGMAC_CMDCFG_TE |
1130 BGMAC_CMDCFG_RE |
1131 BGMAC_CMDCFG_RPI |
1132 BGMAC_CMDCFG_TAI |
1133 BGMAC_CMDCFG_HD |
1134 BGMAC_CMDCFG_ML |
1135 BGMAC_CMDCFG_CFE |
1136 BGMAC_CMDCFG_RL |
1137 BGMAC_CMDCFG_RED |
1138 BGMAC_CMDCFG_PE |
1139 BGMAC_CMDCFG_TPI |
1140 BGMAC_CMDCFG_PAD_EN |
1141 BGMAC_CMDCFG_PF),
1142 BGMAC_CMDCFG_PROM |
1143 BGMAC_CMDCFG_NLC |
1144 BGMAC_CMDCFG_CFE |
1145 BGMAC_CMDCFG_SR(core->id.rev),
1146 false);
1147 bgmac->mac_speed = SPEED_UNKNOWN;
1148 bgmac->mac_duplex = DUPLEX_UNKNOWN;
1149
1150 bgmac_clear_mib(bgmac);
1151 if (core->id.id == BCMA_CORE_4706_MAC_GBIT)
1152 bcma_maskset32(bgmac->cmn, BCMA_GMAC_CMN_PHY_CTL, ~0,
1153 BCMA_GMAC_CMN_PC_MTE);
1154 else
1155 bgmac_set(bgmac, BGMAC_PHY_CNTL, BGMAC_PC_MTE);
1156 bgmac_miiconfig(bgmac);
1157 bgmac_phy_init(bgmac);
1158
1159 netdev_reset_queue(bgmac->net_dev);
1160 }
1161
1162 static void bgmac_chip_intrs_on(struct bgmac *bgmac)
1163 {
1164 bgmac_write(bgmac, BGMAC_INT_MASK, bgmac->int_mask);
1165 }
1166
1167 static void bgmac_chip_intrs_off(struct bgmac *bgmac)
1168 {
1169 bgmac_write(bgmac, BGMAC_INT_MASK, 0);
1170 bgmac_read(bgmac, BGMAC_INT_MASK);
1171 }
1172
1173 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/gmac_enable */
1174 static void bgmac_enable(struct bgmac *bgmac)
1175 {
1176 struct bcma_chipinfo *ci = &bgmac->core->bus->chipinfo;
1177 u32 cmdcfg;
1178 u32 mode;
1179 u32 rxq_ctl;
1180 u32 fl_ctl;
1181 u16 bp_clk;
1182 u8 mdp;
1183
1184 cmdcfg = bgmac_read(bgmac, BGMAC_CMDCFG);
1185 bgmac_cmdcfg_maskset(bgmac, ~(BGMAC_CMDCFG_TE | BGMAC_CMDCFG_RE),
1186 BGMAC_CMDCFG_SR(bgmac->core->id.rev), true);
1187 udelay(2);
1188 cmdcfg |= BGMAC_CMDCFG_TE | BGMAC_CMDCFG_RE;
1189 bgmac_write(bgmac, BGMAC_CMDCFG, cmdcfg);
1190
1191 mode = (bgmac_read(bgmac, BGMAC_DEV_STATUS) & BGMAC_DS_MM_MASK) >>
1192 BGMAC_DS_MM_SHIFT;
1193 if (ci->id != BCMA_CHIP_ID_BCM47162 || mode != 0)
1194 bgmac_set(bgmac, BCMA_CLKCTLST, BCMA_CLKCTLST_FORCEHT);
1195 if (ci->id == BCMA_CHIP_ID_BCM47162 && mode == 2)
1196 bcma_chipco_chipctl_maskset(&bgmac->core->bus->drv_cc, 1, ~0,
1197 BGMAC_CHIPCTL_1_RXC_DLL_BYPASS);
1198
1199 switch (ci->id) {
1200 case BCMA_CHIP_ID_BCM5357:
1201 case BCMA_CHIP_ID_BCM4749:
1202 case BCMA_CHIP_ID_BCM53572:
1203 case BCMA_CHIP_ID_BCM4716:
1204 case BCMA_CHIP_ID_BCM47162:
1205 fl_ctl = 0x03cb04cb;
1206 if (ci->id == BCMA_CHIP_ID_BCM5357 ||
1207 ci->id == BCMA_CHIP_ID_BCM4749 ||
1208 ci->id == BCMA_CHIP_ID_BCM53572)
1209 fl_ctl = 0x2300e1;
1210 bgmac_write(bgmac, BGMAC_FLOW_CTL_THRESH, fl_ctl);
1211 bgmac_write(bgmac, BGMAC_PAUSE_CTL, 0x27fff);
1212 break;
1213 }
1214
1215 if (!bgmac_is_bcm4707_family(bgmac)) {
1216 rxq_ctl = bgmac_read(bgmac, BGMAC_RXQ_CTL);
1217 rxq_ctl &= ~BGMAC_RXQ_CTL_MDP_MASK;
1218 bp_clk = bcma_pmu_get_bus_clock(&bgmac->core->bus->drv_cc) /
1219 1000000;
1220 mdp = (bp_clk * 128 / 1000) - 3;
1221 rxq_ctl |= (mdp << BGMAC_RXQ_CTL_MDP_SHIFT);
1222 bgmac_write(bgmac, BGMAC_RXQ_CTL, rxq_ctl);
1223 }
1224 }
1225
1226 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipinit */
1227 static void bgmac_chip_init(struct bgmac *bgmac)
1228 {
1229 /* 1 interrupt per received frame */
1230 bgmac_write(bgmac, BGMAC_INT_RECV_LAZY, 1 << BGMAC_IRL_FC_SHIFT);
1231
1232 /* Enable 802.3x tx flow control (honor received PAUSE frames) */
1233 bgmac_cmdcfg_maskset(bgmac, ~BGMAC_CMDCFG_RPI, 0, true);
1234
1235 bgmac_set_rx_mode(bgmac->net_dev);
1236
1237 bgmac_write_mac_address(bgmac, bgmac->net_dev->dev_addr);
1238
1239 if (bgmac->loopback)
1240 bgmac_cmdcfg_maskset(bgmac, ~0, BGMAC_CMDCFG_ML, false);
1241 else
1242 bgmac_cmdcfg_maskset(bgmac, ~BGMAC_CMDCFG_ML, 0, false);
1243
1244 bgmac_write(bgmac, BGMAC_RXMAX_LENGTH, 32 + ETHER_MAX_LEN);
1245
1246 bgmac_chip_intrs_on(bgmac);
1247
1248 bgmac_enable(bgmac);
1249 }
1250
1251 static irqreturn_t bgmac_interrupt(int irq, void *dev_id)
1252 {
1253 struct bgmac *bgmac = netdev_priv(dev_id);
1254
1255 u32 int_status = bgmac_read(bgmac, BGMAC_INT_STATUS);
1256 int_status &= bgmac->int_mask;
1257
1258 if (!int_status)
1259 return IRQ_NONE;
1260
1261 int_status &= ~(BGMAC_IS_TX0 | BGMAC_IS_RX);
1262 if (int_status)
1263 bgmac_err(bgmac, "Unknown IRQs: 0x%08X\n", int_status);
1264
1265 /* Disable new interrupts until handling existing ones */
1266 bgmac_chip_intrs_off(bgmac);
1267
1268 napi_schedule(&bgmac->napi);
1269
1270 return IRQ_HANDLED;
1271 }
1272
1273 static int bgmac_poll(struct napi_struct *napi, int weight)
1274 {
1275 struct bgmac *bgmac = container_of(napi, struct bgmac, napi);
1276 int handled = 0;
1277
1278 /* Ack */
1279 bgmac_write(bgmac, BGMAC_INT_STATUS, ~0);
1280
1281 bgmac_dma_tx_free(bgmac, &bgmac->tx_ring[0]);
1282 handled += bgmac_dma_rx_read(bgmac, &bgmac->rx_ring[0], weight);
1283
1284 /* Poll again if more events arrived in the meantime */
1285 if (bgmac_read(bgmac, BGMAC_INT_STATUS) & (BGMAC_IS_TX0 | BGMAC_IS_RX))
1286 return weight;
1287
1288 if (handled < weight) {
1289 napi_complete(napi);
1290 bgmac_chip_intrs_on(bgmac);
1291 }
1292
1293 return handled;
1294 }
1295
1296 /**************************************************
1297 * net_device_ops
1298 **************************************************/
1299
1300 static int bgmac_open(struct net_device *net_dev)
1301 {
1302 struct bgmac *bgmac = netdev_priv(net_dev);
1303 int err = 0;
1304
1305 bgmac_chip_reset(bgmac);
1306
1307 err = bgmac_dma_init(bgmac);
1308 if (err)
1309 return err;
1310
1311 /* Specs say about reclaiming rings here, but we do that in DMA init */
1312 bgmac_chip_init(bgmac);
1313
1314 err = request_irq(bgmac->core->irq, bgmac_interrupt, IRQF_SHARED,
1315 KBUILD_MODNAME, net_dev);
1316 if (err < 0) {
1317 bgmac_err(bgmac, "IRQ request error: %d!\n", err);
1318 bgmac_dma_cleanup(bgmac);
1319 return err;
1320 }
1321 napi_enable(&bgmac->napi);
1322
1323 phy_start(bgmac->phy_dev);
1324
1325 netif_carrier_on(net_dev);
1326 return 0;
1327 }
1328
1329 static int bgmac_stop(struct net_device *net_dev)
1330 {
1331 struct bgmac *bgmac = netdev_priv(net_dev);
1332
1333 netif_carrier_off(net_dev);
1334
1335 phy_stop(bgmac->phy_dev);
1336
1337 napi_disable(&bgmac->napi);
1338 bgmac_chip_intrs_off(bgmac);
1339 free_irq(bgmac->core->irq, net_dev);
1340
1341 bgmac_chip_reset(bgmac);
1342 bgmac_dma_cleanup(bgmac);
1343
1344 return 0;
1345 }
1346
1347 static netdev_tx_t bgmac_start_xmit(struct sk_buff *skb,
1348 struct net_device *net_dev)
1349 {
1350 struct bgmac *bgmac = netdev_priv(net_dev);
1351 struct bgmac_dma_ring *ring;
1352
1353 /* No QOS support yet */
1354 ring = &bgmac->tx_ring[0];
1355 return bgmac_dma_tx_add(bgmac, ring, skb);
1356 }
1357
1358 static int bgmac_set_mac_address(struct net_device *net_dev, void *addr)
1359 {
1360 struct bgmac *bgmac = netdev_priv(net_dev);
1361 int ret;
1362
1363 ret = eth_prepare_mac_addr_change(net_dev, addr);
1364 if (ret < 0)
1365 return ret;
1366 bgmac_write_mac_address(bgmac, (u8 *)addr);
1367 eth_commit_mac_addr_change(net_dev, addr);
1368 return 0;
1369 }
1370
1371 static int bgmac_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd)
1372 {
1373 struct bgmac *bgmac = netdev_priv(net_dev);
1374
1375 if (!netif_running(net_dev))
1376 return -EINVAL;
1377
1378 return phy_mii_ioctl(bgmac->phy_dev, ifr, cmd);
1379 }
1380
1381 static const struct net_device_ops bgmac_netdev_ops = {
1382 .ndo_open = bgmac_open,
1383 .ndo_stop = bgmac_stop,
1384 .ndo_start_xmit = bgmac_start_xmit,
1385 .ndo_set_rx_mode = bgmac_set_rx_mode,
1386 .ndo_set_mac_address = bgmac_set_mac_address,
1387 .ndo_validate_addr = eth_validate_addr,
1388 .ndo_do_ioctl = bgmac_ioctl,
1389 };
1390
1391 /**************************************************
1392 * ethtool_ops
1393 **************************************************/
1394
1395 struct bgmac_stat {
1396 u8 size;
1397 u32 offset;
1398 const char *name;
1399 };
1400
1401 static struct bgmac_stat bgmac_get_strings_stats[] = {
1402 { 8, BGMAC_TX_GOOD_OCTETS, "tx_good_octets" },
1403 { 4, BGMAC_TX_GOOD_PKTS, "tx_good" },
1404 { 8, BGMAC_TX_OCTETS, "tx_octets" },
1405 { 4, BGMAC_TX_PKTS, "tx_pkts" },
1406 { 4, BGMAC_TX_BROADCAST_PKTS, "tx_broadcast" },
1407 { 4, BGMAC_TX_MULTICAST_PKTS, "tx_multicast" },
1408 { 4, BGMAC_TX_LEN_64, "tx_64" },
1409 { 4, BGMAC_TX_LEN_65_TO_127, "tx_65_127" },
1410 { 4, BGMAC_TX_LEN_128_TO_255, "tx_128_255" },
1411 { 4, BGMAC_TX_LEN_256_TO_511, "tx_256_511" },
1412 { 4, BGMAC_TX_LEN_512_TO_1023, "tx_512_1023" },
1413 { 4, BGMAC_TX_LEN_1024_TO_1522, "tx_1024_1522" },
1414 { 4, BGMAC_TX_LEN_1523_TO_2047, "tx_1523_2047" },
1415 { 4, BGMAC_TX_LEN_2048_TO_4095, "tx_2048_4095" },
1416 { 4, BGMAC_TX_LEN_4096_TO_8191, "tx_4096_8191" },
1417 { 4, BGMAC_TX_LEN_8192_TO_MAX, "tx_8192_max" },
1418 { 4, BGMAC_TX_JABBER_PKTS, "tx_jabber" },
1419 { 4, BGMAC_TX_OVERSIZE_PKTS, "tx_oversize" },
1420 { 4, BGMAC_TX_FRAGMENT_PKTS, "tx_fragment" },
1421 { 4, BGMAC_TX_UNDERRUNS, "tx_underruns" },
1422 { 4, BGMAC_TX_TOTAL_COLS, "tx_total_cols" },
1423 { 4, BGMAC_TX_SINGLE_COLS, "tx_single_cols" },
1424 { 4, BGMAC_TX_MULTIPLE_COLS, "tx_multiple_cols" },
1425 { 4, BGMAC_TX_EXCESSIVE_COLS, "tx_excessive_cols" },
1426 { 4, BGMAC_TX_LATE_COLS, "tx_late_cols" },
1427 { 4, BGMAC_TX_DEFERED, "tx_defered" },
1428 { 4, BGMAC_TX_CARRIER_LOST, "tx_carrier_lost" },
1429 { 4, BGMAC_TX_PAUSE_PKTS, "tx_pause" },
1430 { 4, BGMAC_TX_UNI_PKTS, "tx_unicast" },
1431 { 4, BGMAC_TX_Q0_PKTS, "tx_q0" },
1432 { 8, BGMAC_TX_Q0_OCTETS, "tx_q0_octets" },
1433 { 4, BGMAC_TX_Q1_PKTS, "tx_q1" },
1434 { 8, BGMAC_TX_Q1_OCTETS, "tx_q1_octets" },
1435 { 4, BGMAC_TX_Q2_PKTS, "tx_q2" },
1436 { 8, BGMAC_TX_Q2_OCTETS, "tx_q2_octets" },
1437 { 4, BGMAC_TX_Q3_PKTS, "tx_q3" },
1438 { 8, BGMAC_TX_Q3_OCTETS, "tx_q3_octets" },
1439 { 8, BGMAC_RX_GOOD_OCTETS, "rx_good_octets" },
1440 { 4, BGMAC_RX_GOOD_PKTS, "rx_good" },
1441 { 8, BGMAC_RX_OCTETS, "rx_octets" },
1442 { 4, BGMAC_RX_PKTS, "rx_pkts" },
1443 { 4, BGMAC_RX_BROADCAST_PKTS, "rx_broadcast" },
1444 { 4, BGMAC_RX_MULTICAST_PKTS, "rx_multicast" },
1445 { 4, BGMAC_RX_LEN_64, "rx_64" },
1446 { 4, BGMAC_RX_LEN_65_TO_127, "rx_65_127" },
1447 { 4, BGMAC_RX_LEN_128_TO_255, "rx_128_255" },
1448 { 4, BGMAC_RX_LEN_256_TO_511, "rx_256_511" },
1449 { 4, BGMAC_RX_LEN_512_TO_1023, "rx_512_1023" },
1450 { 4, BGMAC_RX_LEN_1024_TO_1522, "rx_1024_1522" },
1451 { 4, BGMAC_RX_LEN_1523_TO_2047, "rx_1523_2047" },
1452 { 4, BGMAC_RX_LEN_2048_TO_4095, "rx_2048_4095" },
1453 { 4, BGMAC_RX_LEN_4096_TO_8191, "rx_4096_8191" },
1454 { 4, BGMAC_RX_LEN_8192_TO_MAX, "rx_8192_max" },
1455 { 4, BGMAC_RX_JABBER_PKTS, "rx_jabber" },
1456 { 4, BGMAC_RX_OVERSIZE_PKTS, "rx_oversize" },
1457 { 4, BGMAC_RX_FRAGMENT_PKTS, "rx_fragment" },
1458 { 4, BGMAC_RX_MISSED_PKTS, "rx_missed" },
1459 { 4, BGMAC_RX_CRC_ALIGN_ERRS, "rx_crc_align" },
1460 { 4, BGMAC_RX_UNDERSIZE, "rx_undersize" },
1461 { 4, BGMAC_RX_CRC_ERRS, "rx_crc" },
1462 { 4, BGMAC_RX_ALIGN_ERRS, "rx_align" },
1463 { 4, BGMAC_RX_SYMBOL_ERRS, "rx_symbol" },
1464 { 4, BGMAC_RX_PAUSE_PKTS, "rx_pause" },
1465 { 4, BGMAC_RX_NONPAUSE_PKTS, "rx_nonpause" },
1466 { 4, BGMAC_RX_SACHANGES, "rx_sa_changes" },
1467 { 4, BGMAC_RX_UNI_PKTS, "rx_unicast" },
1468 };
1469
1470 #define BGMAC_STATS_LEN ARRAY_SIZE(bgmac_get_strings_stats)
1471
1472 static int bgmac_get_sset_count(struct net_device *dev, int string_set)
1473 {
1474 switch (string_set) {
1475 case ETH_SS_STATS:
1476 return BGMAC_STATS_LEN;
1477 }
1478
1479 return -EOPNOTSUPP;
1480 }
1481
1482 static void bgmac_get_strings(struct net_device *dev, u32 stringset,
1483 u8 *data)
1484 {
1485 int i;
1486
1487 if (stringset != ETH_SS_STATS)
1488 return;
1489
1490 for (i = 0; i < BGMAC_STATS_LEN; i++)
1491 strlcpy(data + i * ETH_GSTRING_LEN,
1492 bgmac_get_strings_stats[i].name, ETH_GSTRING_LEN);
1493 }
1494
1495 static void bgmac_get_ethtool_stats(struct net_device *dev,
1496 struct ethtool_stats *ss, uint64_t *data)
1497 {
1498 struct bgmac *bgmac = netdev_priv(dev);
1499 const struct bgmac_stat *s;
1500 unsigned int i;
1501 u64 val;
1502
1503 if (!netif_running(dev))
1504 return;
1505
1506 for (i = 0; i < BGMAC_STATS_LEN; i++) {
1507 s = &bgmac_get_strings_stats[i];
1508 val = 0;
1509 if (s->size == 8)
1510 val = (u64)bgmac_read(bgmac, s->offset + 4) << 32;
1511 val |= bgmac_read(bgmac, s->offset);
1512 data[i] = val;
1513 }
1514 }
1515
1516 static int bgmac_get_settings(struct net_device *net_dev,
1517 struct ethtool_cmd *cmd)
1518 {
1519 struct bgmac *bgmac = netdev_priv(net_dev);
1520
1521 return phy_ethtool_gset(bgmac->phy_dev, cmd);
1522 }
1523
1524 static int bgmac_set_settings(struct net_device *net_dev,
1525 struct ethtool_cmd *cmd)
1526 {
1527 struct bgmac *bgmac = netdev_priv(net_dev);
1528
1529 return phy_ethtool_sset(bgmac->phy_dev, cmd);
1530 }
1531
1532 static void bgmac_get_drvinfo(struct net_device *net_dev,
1533 struct ethtool_drvinfo *info)
1534 {
1535 strlcpy(info->driver, KBUILD_MODNAME, sizeof(info->driver));
1536 strlcpy(info->bus_info, "BCMA", sizeof(info->bus_info));
1537 }
1538
1539 static const struct ethtool_ops bgmac_ethtool_ops = {
1540 .get_strings = bgmac_get_strings,
1541 .get_sset_count = bgmac_get_sset_count,
1542 .get_ethtool_stats = bgmac_get_ethtool_stats,
1543 .get_settings = bgmac_get_settings,
1544 .set_settings = bgmac_set_settings,
1545 .get_drvinfo = bgmac_get_drvinfo,
1546 };
1547
1548 /**************************************************
1549 * MII
1550 **************************************************/
1551
1552 static int bgmac_mii_read(struct mii_bus *bus, int mii_id, int regnum)
1553 {
1554 return bgmac_phy_read(bus->priv, mii_id, regnum);
1555 }
1556
1557 static int bgmac_mii_write(struct mii_bus *bus, int mii_id, int regnum,
1558 u16 value)
1559 {
1560 return bgmac_phy_write(bus->priv, mii_id, regnum, value);
1561 }
1562
1563 static void bgmac_adjust_link(struct net_device *net_dev)
1564 {
1565 struct bgmac *bgmac = netdev_priv(net_dev);
1566 struct phy_device *phy_dev = bgmac->phy_dev;
1567 bool update = false;
1568
1569 if (phy_dev->link) {
1570 if (phy_dev->speed != bgmac->mac_speed) {
1571 bgmac->mac_speed = phy_dev->speed;
1572 update = true;
1573 }
1574
1575 if (phy_dev->duplex != bgmac->mac_duplex) {
1576 bgmac->mac_duplex = phy_dev->duplex;
1577 update = true;
1578 }
1579 }
1580
1581 if (update) {
1582 bgmac_mac_speed(bgmac);
1583 phy_print_status(phy_dev);
1584 }
1585 }
1586
1587 static int bgmac_fixed_phy_register(struct bgmac *bgmac)
1588 {
1589 struct fixed_phy_status fphy_status = {
1590 .link = 1,
1591 .speed = SPEED_1000,
1592 .duplex = DUPLEX_FULL,
1593 };
1594 struct phy_device *phy_dev;
1595 int err;
1596
1597 phy_dev = fixed_phy_register(PHY_POLL, &fphy_status, -1, NULL);
1598 if (!phy_dev || IS_ERR(phy_dev)) {
1599 bgmac_err(bgmac, "Failed to register fixed PHY device\n");
1600 return -ENODEV;
1601 }
1602
1603 err = phy_connect_direct(bgmac->net_dev, phy_dev, bgmac_adjust_link,
1604 PHY_INTERFACE_MODE_MII);
1605 if (err) {
1606 bgmac_err(bgmac, "Connecting PHY failed\n");
1607 return err;
1608 }
1609
1610 bgmac->phy_dev = phy_dev;
1611
1612 return err;
1613 }
1614
1615 static int bgmac_mii_register(struct bgmac *bgmac)
1616 {
1617 struct mii_bus *mii_bus;
1618 struct phy_device *phy_dev;
1619 char bus_id[MII_BUS_ID_SIZE + 3];
1620 int err = 0;
1621
1622 if (bgmac_is_bcm4707_family(bgmac))
1623 return bgmac_fixed_phy_register(bgmac);
1624
1625 mii_bus = mdiobus_alloc();
1626 if (!mii_bus)
1627 return -ENOMEM;
1628
1629 mii_bus->name = "bgmac mii bus";
1630 sprintf(mii_bus->id, "%s-%d-%d", "bgmac", bgmac->core->bus->num,
1631 bgmac->core->core_unit);
1632 mii_bus->priv = bgmac;
1633 mii_bus->read = bgmac_mii_read;
1634 mii_bus->write = bgmac_mii_write;
1635 mii_bus->parent = &bgmac->core->dev;
1636 mii_bus->phy_mask = ~(1 << bgmac->phyaddr);
1637
1638 err = mdiobus_register(mii_bus);
1639 if (err) {
1640 bgmac_err(bgmac, "Registration of mii bus failed\n");
1641 goto err_free_bus;
1642 }
1643
1644 bgmac->mii_bus = mii_bus;
1645
1646 /* Connect to the PHY */
1647 snprintf(bus_id, sizeof(bus_id), PHY_ID_FMT, mii_bus->id,
1648 bgmac->phyaddr);
1649 phy_dev = phy_connect(bgmac->net_dev, bus_id, &bgmac_adjust_link,
1650 PHY_INTERFACE_MODE_MII);
1651 if (IS_ERR(phy_dev)) {
1652 bgmac_err(bgmac, "PHY connection failed\n");
1653 err = PTR_ERR(phy_dev);
1654 goto err_unregister_bus;
1655 }
1656 bgmac->phy_dev = phy_dev;
1657
1658 return err;
1659
1660 err_unregister_bus:
1661 mdiobus_unregister(mii_bus);
1662 err_free_bus:
1663 mdiobus_free(mii_bus);
1664 return err;
1665 }
1666
1667 static void bgmac_mii_unregister(struct bgmac *bgmac)
1668 {
1669 struct mii_bus *mii_bus = bgmac->mii_bus;
1670
1671 mdiobus_unregister(mii_bus);
1672 mdiobus_free(mii_bus);
1673 }
1674
1675 /**************************************************
1676 * BCMA bus ops
1677 **************************************************/
1678
1679 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipattach */
1680 static int bgmac_probe(struct bcma_device *core)
1681 {
1682 struct net_device *net_dev;
1683 struct bgmac *bgmac;
1684 struct ssb_sprom *sprom = &core->bus->sprom;
1685 u8 *mac;
1686 int err;
1687
1688 switch (core->core_unit) {
1689 case 0:
1690 mac = sprom->et0mac;
1691 break;
1692 case 1:
1693 mac = sprom->et1mac;
1694 break;
1695 case 2:
1696 mac = sprom->et2mac;
1697 break;
1698 default:
1699 pr_err("Unsupported core_unit %d\n", core->core_unit);
1700 return -ENOTSUPP;
1701 }
1702
1703 if (!is_valid_ether_addr(mac)) {
1704 dev_err(&core->dev, "Invalid MAC addr: %pM\n", mac);
1705 eth_random_addr(mac);
1706 dev_warn(&core->dev, "Using random MAC: %pM\n", mac);
1707 }
1708
1709 /* This (reset &) enable is not preset in specs or reference driver but
1710 * Broadcom does it in arch PCI code when enabling fake PCI device.
1711 */
1712 bcma_core_enable(core, 0);
1713
1714 /* Allocation and references */
1715 net_dev = alloc_etherdev(sizeof(*bgmac));
1716 if (!net_dev)
1717 return -ENOMEM;
1718 net_dev->netdev_ops = &bgmac_netdev_ops;
1719 net_dev->irq = core->irq;
1720 net_dev->ethtool_ops = &bgmac_ethtool_ops;
1721 bgmac = netdev_priv(net_dev);
1722 bgmac->net_dev = net_dev;
1723 bgmac->core = core;
1724 bcma_set_drvdata(core, bgmac);
1725 SET_NETDEV_DEV(net_dev, &core->dev);
1726
1727 /* Defaults */
1728 memcpy(bgmac->net_dev->dev_addr, mac, ETH_ALEN);
1729
1730 /* On BCM4706 we need common core to access PHY */
1731 if (core->id.id == BCMA_CORE_4706_MAC_GBIT &&
1732 !core->bus->drv_gmac_cmn.core) {
1733 bgmac_err(bgmac, "GMAC CMN core not found (required for BCM4706)\n");
1734 err = -ENODEV;
1735 goto err_netdev_free;
1736 }
1737 bgmac->cmn = core->bus->drv_gmac_cmn.core;
1738
1739 switch (core->core_unit) {
1740 case 0:
1741 bgmac->phyaddr = sprom->et0phyaddr;
1742 break;
1743 case 1:
1744 bgmac->phyaddr = sprom->et1phyaddr;
1745 break;
1746 case 2:
1747 bgmac->phyaddr = sprom->et2phyaddr;
1748 break;
1749 }
1750 bgmac->phyaddr &= BGMAC_PHY_MASK;
1751 if (bgmac->phyaddr == BGMAC_PHY_MASK) {
1752 bgmac_err(bgmac, "No PHY found\n");
1753 err = -ENODEV;
1754 goto err_netdev_free;
1755 }
1756 bgmac_info(bgmac, "Found PHY addr: %d%s\n", bgmac->phyaddr,
1757 bgmac->phyaddr == BGMAC_PHY_NOREGS ? " (NOREGS)" : "");
1758
1759 if (core->bus->hosttype == BCMA_HOSTTYPE_PCI) {
1760 bgmac_err(bgmac, "PCI setup not implemented\n");
1761 err = -ENOTSUPP;
1762 goto err_netdev_free;
1763 }
1764
1765 bgmac_chip_reset(bgmac);
1766
1767 /* For Northstar, we have to take all GMAC core out of reset */
1768 if (bgmac_is_bcm4707_family(bgmac)) {
1769 struct bcma_device *ns_core;
1770 int ns_gmac;
1771
1772 /* Northstar has 4 GMAC cores */
1773 for (ns_gmac = 0; ns_gmac < 4; ns_gmac++) {
1774 /* As Northstar requirement, we have to reset all GMACs
1775 * before accessing one. bgmac_chip_reset() call
1776 * bcma_core_enable() for this core. Then the other
1777 * three GMACs didn't reset. We do it here.
1778 */
1779 ns_core = bcma_find_core_unit(core->bus,
1780 BCMA_CORE_MAC_GBIT,
1781 ns_gmac);
1782 if (ns_core && !bcma_core_is_enabled(ns_core))
1783 bcma_core_enable(ns_core, 0);
1784 }
1785 }
1786
1787 err = bgmac_dma_alloc(bgmac);
1788 if (err) {
1789 bgmac_err(bgmac, "Unable to alloc memory for DMA\n");
1790 goto err_netdev_free;
1791 }
1792
1793 bgmac->int_mask = BGMAC_IS_ERRMASK | BGMAC_IS_RX | BGMAC_IS_TX_MASK;
1794 if (bcm47xx_nvram_getenv("et0_no_txint", NULL, 0) == 0)
1795 bgmac->int_mask &= ~BGMAC_IS_TX_MASK;
1796
1797 /* TODO: reset the external phy. Specs are needed */
1798 bgmac_phy_reset(bgmac);
1799
1800 bgmac->has_robosw = !!(core->bus->sprom.boardflags_lo &
1801 BGMAC_BFL_ENETROBO);
1802 if (bgmac->has_robosw)
1803 bgmac_warn(bgmac, "Support for Roboswitch not implemented\n");
1804
1805 if (core->bus->sprom.boardflags_lo & BGMAC_BFL_ENETADM)
1806 bgmac_warn(bgmac, "Support for ADMtek ethernet switch not implemented\n");
1807
1808 netif_napi_add(net_dev, &bgmac->napi, bgmac_poll, BGMAC_WEIGHT);
1809
1810 err = bgmac_mii_register(bgmac);
1811 if (err) {
1812 bgmac_err(bgmac, "Cannot register MDIO\n");
1813 goto err_dma_free;
1814 }
1815
1816 net_dev->features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1817 net_dev->hw_features = net_dev->features;
1818 net_dev->vlan_features = net_dev->features;
1819
1820 err = register_netdev(bgmac->net_dev);
1821 if (err) {
1822 bgmac_err(bgmac, "Cannot register net device\n");
1823 goto err_mii_unregister;
1824 }
1825
1826 netif_carrier_off(net_dev);
1827
1828 return 0;
1829
1830 err_mii_unregister:
1831 bgmac_mii_unregister(bgmac);
1832 err_dma_free:
1833 bgmac_dma_free(bgmac);
1834
1835 err_netdev_free:
1836 bcma_set_drvdata(core, NULL);
1837 free_netdev(net_dev);
1838
1839 return err;
1840 }
1841
1842 static void bgmac_remove(struct bcma_device *core)
1843 {
1844 struct bgmac *bgmac = bcma_get_drvdata(core);
1845
1846 unregister_netdev(bgmac->net_dev);
1847 bgmac_mii_unregister(bgmac);
1848 netif_napi_del(&bgmac->napi);
1849 bgmac_dma_free(bgmac);
1850 bcma_set_drvdata(core, NULL);
1851 free_netdev(bgmac->net_dev);
1852 }
1853
1854 static struct bcma_driver bgmac_bcma_driver = {
1855 .name = KBUILD_MODNAME,
1856 .id_table = bgmac_bcma_tbl,
1857 .probe = bgmac_probe,
1858 .remove = bgmac_remove,
1859 };
1860
1861 static int __init bgmac_init(void)
1862 {
1863 int err;
1864
1865 err = bcma_driver_register(&bgmac_bcma_driver);
1866 if (err)
1867 return err;
1868 pr_info("Broadcom 47xx GBit MAC driver loaded\n");
1869
1870 return 0;
1871 }
1872
1873 static void __exit bgmac_exit(void)
1874 {
1875 bcma_driver_unregister(&bgmac_bcma_driver);
1876 }
1877
1878 module_init(bgmac_init)
1879 module_exit(bgmac_exit)
1880
1881 MODULE_AUTHOR("Rafał Miłecki");
1882 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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