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Merge branch 'perf/rbtree_copy' of git://git.kernel.org/pub/scm/linux/kernel/git...
[deliverable/linux.git] / drivers / net / ethernet / faraday / ftgmac100.c
1 /*
2 * Faraday FTGMAC100 Gigabit Ethernet
3 *
4 * (C) Copyright 2009-2011 Faraday Technology
5 * Po-Yu Chuang <ratbert@faraday-tech.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21
22 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
23
24 #include <linux/dma-mapping.h>
25 #include <linux/etherdevice.h>
26 #include <linux/ethtool.h>
27 #include <linux/interrupt.h>
28 #include <linux/io.h>
29 #include <linux/module.h>
30 #include <linux/netdevice.h>
31 #include <linux/phy.h>
32 #include <linux/platform_device.h>
33 #include <net/ip.h>
34
35 #include "ftgmac100.h"
36
37 #define DRV_NAME "ftgmac100"
38 #define DRV_VERSION "0.7"
39
40 #define RX_QUEUE_ENTRIES 256 /* must be power of 2 */
41 #define TX_QUEUE_ENTRIES 512 /* must be power of 2 */
42
43 #define MAX_PKT_SIZE 1518
44 #define RX_BUF_SIZE PAGE_SIZE /* must be smaller than 0x3fff */
45
46 /******************************************************************************
47 * private data
48 *****************************************************************************/
49 struct ftgmac100_descs {
50 struct ftgmac100_rxdes rxdes[RX_QUEUE_ENTRIES];
51 struct ftgmac100_txdes txdes[TX_QUEUE_ENTRIES];
52 };
53
54 struct ftgmac100 {
55 struct resource *res;
56 void __iomem *base;
57 int irq;
58
59 struct ftgmac100_descs *descs;
60 dma_addr_t descs_dma_addr;
61
62 unsigned int rx_pointer;
63 unsigned int tx_clean_pointer;
64 unsigned int tx_pointer;
65 unsigned int tx_pending;
66
67 spinlock_t tx_lock;
68
69 struct net_device *netdev;
70 struct device *dev;
71 struct napi_struct napi;
72
73 struct mii_bus *mii_bus;
74 int phy_irq[PHY_MAX_ADDR];
75 struct phy_device *phydev;
76 int old_speed;
77 };
78
79 static int ftgmac100_alloc_rx_page(struct ftgmac100 *priv,
80 struct ftgmac100_rxdes *rxdes, gfp_t gfp);
81
82 /******************************************************************************
83 * internal functions (hardware register access)
84 *****************************************************************************/
85 #define INT_MASK_ALL_ENABLED (FTGMAC100_INT_RPKT_LOST | \
86 FTGMAC100_INT_XPKT_ETH | \
87 FTGMAC100_INT_XPKT_LOST | \
88 FTGMAC100_INT_AHB_ERR | \
89 FTGMAC100_INT_PHYSTS_CHG | \
90 FTGMAC100_INT_RPKT_BUF | \
91 FTGMAC100_INT_NO_RXBUF)
92
93 static void ftgmac100_set_rx_ring_base(struct ftgmac100 *priv, dma_addr_t addr)
94 {
95 iowrite32(addr, priv->base + FTGMAC100_OFFSET_RXR_BADR);
96 }
97
98 static void ftgmac100_set_rx_buffer_size(struct ftgmac100 *priv,
99 unsigned int size)
100 {
101 size = FTGMAC100_RBSR_SIZE(size);
102 iowrite32(size, priv->base + FTGMAC100_OFFSET_RBSR);
103 }
104
105 static void ftgmac100_set_normal_prio_tx_ring_base(struct ftgmac100 *priv,
106 dma_addr_t addr)
107 {
108 iowrite32(addr, priv->base + FTGMAC100_OFFSET_NPTXR_BADR);
109 }
110
111 static void ftgmac100_txdma_normal_prio_start_polling(struct ftgmac100 *priv)
112 {
113 iowrite32(1, priv->base + FTGMAC100_OFFSET_NPTXPD);
114 }
115
116 static int ftgmac100_reset_hw(struct ftgmac100 *priv)
117 {
118 struct net_device *netdev = priv->netdev;
119 int i;
120
121 /* NOTE: reset clears all registers */
122 iowrite32(FTGMAC100_MACCR_SW_RST, priv->base + FTGMAC100_OFFSET_MACCR);
123 for (i = 0; i < 5; i++) {
124 unsigned int maccr;
125
126 maccr = ioread32(priv->base + FTGMAC100_OFFSET_MACCR);
127 if (!(maccr & FTGMAC100_MACCR_SW_RST))
128 return 0;
129
130 udelay(1000);
131 }
132
133 netdev_err(netdev, "software reset failed\n");
134 return -EIO;
135 }
136
137 static void ftgmac100_set_mac(struct ftgmac100 *priv, const unsigned char *mac)
138 {
139 unsigned int maddr = mac[0] << 8 | mac[1];
140 unsigned int laddr = mac[2] << 24 | mac[3] << 16 | mac[4] << 8 | mac[5];
141
142 iowrite32(maddr, priv->base + FTGMAC100_OFFSET_MAC_MADR);
143 iowrite32(laddr, priv->base + FTGMAC100_OFFSET_MAC_LADR);
144 }
145
146 static void ftgmac100_init_hw(struct ftgmac100 *priv)
147 {
148 /* setup ring buffer base registers */
149 ftgmac100_set_rx_ring_base(priv,
150 priv->descs_dma_addr +
151 offsetof(struct ftgmac100_descs, rxdes));
152 ftgmac100_set_normal_prio_tx_ring_base(priv,
153 priv->descs_dma_addr +
154 offsetof(struct ftgmac100_descs, txdes));
155
156 ftgmac100_set_rx_buffer_size(priv, RX_BUF_SIZE);
157
158 iowrite32(FTGMAC100_APTC_RXPOLL_CNT(1), priv->base + FTGMAC100_OFFSET_APTC);
159
160 ftgmac100_set_mac(priv, priv->netdev->dev_addr);
161 }
162
163 #define MACCR_ENABLE_ALL (FTGMAC100_MACCR_TXDMA_EN | \
164 FTGMAC100_MACCR_RXDMA_EN | \
165 FTGMAC100_MACCR_TXMAC_EN | \
166 FTGMAC100_MACCR_RXMAC_EN | \
167 FTGMAC100_MACCR_FULLDUP | \
168 FTGMAC100_MACCR_CRC_APD | \
169 FTGMAC100_MACCR_RX_RUNT | \
170 FTGMAC100_MACCR_RX_BROADPKT)
171
172 static void ftgmac100_start_hw(struct ftgmac100 *priv, int speed)
173 {
174 int maccr = MACCR_ENABLE_ALL;
175
176 switch (speed) {
177 default:
178 case 10:
179 break;
180
181 case 100:
182 maccr |= FTGMAC100_MACCR_FAST_MODE;
183 break;
184
185 case 1000:
186 maccr |= FTGMAC100_MACCR_GIGA_MODE;
187 break;
188 }
189
190 iowrite32(maccr, priv->base + FTGMAC100_OFFSET_MACCR);
191 }
192
193 static void ftgmac100_stop_hw(struct ftgmac100 *priv)
194 {
195 iowrite32(0, priv->base + FTGMAC100_OFFSET_MACCR);
196 }
197
198 /******************************************************************************
199 * internal functions (receive descriptor)
200 *****************************************************************************/
201 static bool ftgmac100_rxdes_first_segment(struct ftgmac100_rxdes *rxdes)
202 {
203 return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_FRS);
204 }
205
206 static bool ftgmac100_rxdes_last_segment(struct ftgmac100_rxdes *rxdes)
207 {
208 return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_LRS);
209 }
210
211 static bool ftgmac100_rxdes_packet_ready(struct ftgmac100_rxdes *rxdes)
212 {
213 return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_RXPKT_RDY);
214 }
215
216 static void ftgmac100_rxdes_set_dma_own(struct ftgmac100_rxdes *rxdes)
217 {
218 /* clear status bits */
219 rxdes->rxdes0 &= cpu_to_le32(FTGMAC100_RXDES0_EDORR);
220 }
221
222 static bool ftgmac100_rxdes_rx_error(struct ftgmac100_rxdes *rxdes)
223 {
224 return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_RX_ERR);
225 }
226
227 static bool ftgmac100_rxdes_crc_error(struct ftgmac100_rxdes *rxdes)
228 {
229 return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_CRC_ERR);
230 }
231
232 static bool ftgmac100_rxdes_frame_too_long(struct ftgmac100_rxdes *rxdes)
233 {
234 return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_FTL);
235 }
236
237 static bool ftgmac100_rxdes_runt(struct ftgmac100_rxdes *rxdes)
238 {
239 return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_RUNT);
240 }
241
242 static bool ftgmac100_rxdes_odd_nibble(struct ftgmac100_rxdes *rxdes)
243 {
244 return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_RX_ODD_NB);
245 }
246
247 static unsigned int ftgmac100_rxdes_data_length(struct ftgmac100_rxdes *rxdes)
248 {
249 return le32_to_cpu(rxdes->rxdes0) & FTGMAC100_RXDES0_VDBC;
250 }
251
252 static bool ftgmac100_rxdes_multicast(struct ftgmac100_rxdes *rxdes)
253 {
254 return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_MULTICAST);
255 }
256
257 static void ftgmac100_rxdes_set_end_of_ring(struct ftgmac100_rxdes *rxdes)
258 {
259 rxdes->rxdes0 |= cpu_to_le32(FTGMAC100_RXDES0_EDORR);
260 }
261
262 static void ftgmac100_rxdes_set_dma_addr(struct ftgmac100_rxdes *rxdes,
263 dma_addr_t addr)
264 {
265 rxdes->rxdes3 = cpu_to_le32(addr);
266 }
267
268 static dma_addr_t ftgmac100_rxdes_get_dma_addr(struct ftgmac100_rxdes *rxdes)
269 {
270 return le32_to_cpu(rxdes->rxdes3);
271 }
272
273 static bool ftgmac100_rxdes_is_tcp(struct ftgmac100_rxdes *rxdes)
274 {
275 return (rxdes->rxdes1 & cpu_to_le32(FTGMAC100_RXDES1_PROT_MASK)) ==
276 cpu_to_le32(FTGMAC100_RXDES1_PROT_TCPIP);
277 }
278
279 static bool ftgmac100_rxdes_is_udp(struct ftgmac100_rxdes *rxdes)
280 {
281 return (rxdes->rxdes1 & cpu_to_le32(FTGMAC100_RXDES1_PROT_MASK)) ==
282 cpu_to_le32(FTGMAC100_RXDES1_PROT_UDPIP);
283 }
284
285 static bool ftgmac100_rxdes_tcpcs_err(struct ftgmac100_rxdes *rxdes)
286 {
287 return rxdes->rxdes1 & cpu_to_le32(FTGMAC100_RXDES1_TCP_CHKSUM_ERR);
288 }
289
290 static bool ftgmac100_rxdes_udpcs_err(struct ftgmac100_rxdes *rxdes)
291 {
292 return rxdes->rxdes1 & cpu_to_le32(FTGMAC100_RXDES1_UDP_CHKSUM_ERR);
293 }
294
295 static bool ftgmac100_rxdes_ipcs_err(struct ftgmac100_rxdes *rxdes)
296 {
297 return rxdes->rxdes1 & cpu_to_le32(FTGMAC100_RXDES1_IP_CHKSUM_ERR);
298 }
299
300 /*
301 * rxdes2 is not used by hardware. We use it to keep track of page.
302 * Since hardware does not touch it, we can skip cpu_to_le32()/le32_to_cpu().
303 */
304 static void ftgmac100_rxdes_set_page(struct ftgmac100_rxdes *rxdes, struct page *page)
305 {
306 rxdes->rxdes2 = (unsigned int)page;
307 }
308
309 static struct page *ftgmac100_rxdes_get_page(struct ftgmac100_rxdes *rxdes)
310 {
311 return (struct page *)rxdes->rxdes2;
312 }
313
314 /******************************************************************************
315 * internal functions (receive)
316 *****************************************************************************/
317 static int ftgmac100_next_rx_pointer(int pointer)
318 {
319 return (pointer + 1) & (RX_QUEUE_ENTRIES - 1);
320 }
321
322 static void ftgmac100_rx_pointer_advance(struct ftgmac100 *priv)
323 {
324 priv->rx_pointer = ftgmac100_next_rx_pointer(priv->rx_pointer);
325 }
326
327 static struct ftgmac100_rxdes *ftgmac100_current_rxdes(struct ftgmac100 *priv)
328 {
329 return &priv->descs->rxdes[priv->rx_pointer];
330 }
331
332 static struct ftgmac100_rxdes *
333 ftgmac100_rx_locate_first_segment(struct ftgmac100 *priv)
334 {
335 struct ftgmac100_rxdes *rxdes = ftgmac100_current_rxdes(priv);
336
337 while (ftgmac100_rxdes_packet_ready(rxdes)) {
338 if (ftgmac100_rxdes_first_segment(rxdes))
339 return rxdes;
340
341 ftgmac100_rxdes_set_dma_own(rxdes);
342 ftgmac100_rx_pointer_advance(priv);
343 rxdes = ftgmac100_current_rxdes(priv);
344 }
345
346 return NULL;
347 }
348
349 static bool ftgmac100_rx_packet_error(struct ftgmac100 *priv,
350 struct ftgmac100_rxdes *rxdes)
351 {
352 struct net_device *netdev = priv->netdev;
353 bool error = false;
354
355 if (unlikely(ftgmac100_rxdes_rx_error(rxdes))) {
356 if (net_ratelimit())
357 netdev_info(netdev, "rx err\n");
358
359 netdev->stats.rx_errors++;
360 error = true;
361 }
362
363 if (unlikely(ftgmac100_rxdes_crc_error(rxdes))) {
364 if (net_ratelimit())
365 netdev_info(netdev, "rx crc err\n");
366
367 netdev->stats.rx_crc_errors++;
368 error = true;
369 } else if (unlikely(ftgmac100_rxdes_ipcs_err(rxdes))) {
370 if (net_ratelimit())
371 netdev_info(netdev, "rx IP checksum err\n");
372
373 error = true;
374 }
375
376 if (unlikely(ftgmac100_rxdes_frame_too_long(rxdes))) {
377 if (net_ratelimit())
378 netdev_info(netdev, "rx frame too long\n");
379
380 netdev->stats.rx_length_errors++;
381 error = true;
382 } else if (unlikely(ftgmac100_rxdes_runt(rxdes))) {
383 if (net_ratelimit())
384 netdev_info(netdev, "rx runt\n");
385
386 netdev->stats.rx_length_errors++;
387 error = true;
388 } else if (unlikely(ftgmac100_rxdes_odd_nibble(rxdes))) {
389 if (net_ratelimit())
390 netdev_info(netdev, "rx odd nibble\n");
391
392 netdev->stats.rx_length_errors++;
393 error = true;
394 }
395
396 return error;
397 }
398
399 static void ftgmac100_rx_drop_packet(struct ftgmac100 *priv)
400 {
401 struct net_device *netdev = priv->netdev;
402 struct ftgmac100_rxdes *rxdes = ftgmac100_current_rxdes(priv);
403 bool done = false;
404
405 if (net_ratelimit())
406 netdev_dbg(netdev, "drop packet %p\n", rxdes);
407
408 do {
409 if (ftgmac100_rxdes_last_segment(rxdes))
410 done = true;
411
412 ftgmac100_rxdes_set_dma_own(rxdes);
413 ftgmac100_rx_pointer_advance(priv);
414 rxdes = ftgmac100_current_rxdes(priv);
415 } while (!done && ftgmac100_rxdes_packet_ready(rxdes));
416
417 netdev->stats.rx_dropped++;
418 }
419
420 static bool ftgmac100_rx_packet(struct ftgmac100 *priv, int *processed)
421 {
422 struct net_device *netdev = priv->netdev;
423 struct ftgmac100_rxdes *rxdes;
424 struct sk_buff *skb;
425 bool done = false;
426
427 rxdes = ftgmac100_rx_locate_first_segment(priv);
428 if (!rxdes)
429 return false;
430
431 if (unlikely(ftgmac100_rx_packet_error(priv, rxdes))) {
432 ftgmac100_rx_drop_packet(priv);
433 return true;
434 }
435
436 /* start processing */
437 skb = netdev_alloc_skb_ip_align(netdev, 128);
438 if (unlikely(!skb)) {
439 if (net_ratelimit())
440 netdev_err(netdev, "rx skb alloc failed\n");
441
442 ftgmac100_rx_drop_packet(priv);
443 return true;
444 }
445
446 if (unlikely(ftgmac100_rxdes_multicast(rxdes)))
447 netdev->stats.multicast++;
448
449 /*
450 * It seems that HW does checksum incorrectly with fragmented packets,
451 * so we are conservative here - if HW checksum error, let software do
452 * the checksum again.
453 */
454 if ((ftgmac100_rxdes_is_tcp(rxdes) && !ftgmac100_rxdes_tcpcs_err(rxdes)) ||
455 (ftgmac100_rxdes_is_udp(rxdes) && !ftgmac100_rxdes_udpcs_err(rxdes)))
456 skb->ip_summed = CHECKSUM_UNNECESSARY;
457
458 do {
459 dma_addr_t map = ftgmac100_rxdes_get_dma_addr(rxdes);
460 struct page *page = ftgmac100_rxdes_get_page(rxdes);
461 unsigned int size;
462
463 dma_unmap_page(priv->dev, map, RX_BUF_SIZE, DMA_FROM_DEVICE);
464
465 size = ftgmac100_rxdes_data_length(rxdes);
466 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page, 0, size);
467
468 skb->len += size;
469 skb->data_len += size;
470 skb->truesize += PAGE_SIZE;
471
472 if (ftgmac100_rxdes_last_segment(rxdes))
473 done = true;
474
475 ftgmac100_alloc_rx_page(priv, rxdes, GFP_ATOMIC);
476
477 ftgmac100_rx_pointer_advance(priv);
478 rxdes = ftgmac100_current_rxdes(priv);
479 } while (!done);
480
481 /* Small frames are copied into linear part of skb to free one page */
482 if (skb->len <= 128) {
483 skb->truesize -= PAGE_SIZE;
484 __pskb_pull_tail(skb, skb->len);
485 } else {
486 /* We pull the minimum amount into linear part */
487 __pskb_pull_tail(skb, ETH_HLEN);
488 }
489 skb->protocol = eth_type_trans(skb, netdev);
490
491 netdev->stats.rx_packets++;
492 netdev->stats.rx_bytes += skb->len;
493
494 /* push packet to protocol stack */
495 napi_gro_receive(&priv->napi, skb);
496
497 (*processed)++;
498 return true;
499 }
500
501 /******************************************************************************
502 * internal functions (transmit descriptor)
503 *****************************************************************************/
504 static void ftgmac100_txdes_reset(struct ftgmac100_txdes *txdes)
505 {
506 /* clear all except end of ring bit */
507 txdes->txdes0 &= cpu_to_le32(FTGMAC100_TXDES0_EDOTR);
508 txdes->txdes1 = 0;
509 txdes->txdes2 = 0;
510 txdes->txdes3 = 0;
511 }
512
513 static bool ftgmac100_txdes_owned_by_dma(struct ftgmac100_txdes *txdes)
514 {
515 return txdes->txdes0 & cpu_to_le32(FTGMAC100_TXDES0_TXDMA_OWN);
516 }
517
518 static void ftgmac100_txdes_set_dma_own(struct ftgmac100_txdes *txdes)
519 {
520 /*
521 * Make sure dma own bit will not be set before any other
522 * descriptor fields.
523 */
524 wmb();
525 txdes->txdes0 |= cpu_to_le32(FTGMAC100_TXDES0_TXDMA_OWN);
526 }
527
528 static void ftgmac100_txdes_set_end_of_ring(struct ftgmac100_txdes *txdes)
529 {
530 txdes->txdes0 |= cpu_to_le32(FTGMAC100_TXDES0_EDOTR);
531 }
532
533 static void ftgmac100_txdes_set_first_segment(struct ftgmac100_txdes *txdes)
534 {
535 txdes->txdes0 |= cpu_to_le32(FTGMAC100_TXDES0_FTS);
536 }
537
538 static void ftgmac100_txdes_set_last_segment(struct ftgmac100_txdes *txdes)
539 {
540 txdes->txdes0 |= cpu_to_le32(FTGMAC100_TXDES0_LTS);
541 }
542
543 static void ftgmac100_txdes_set_buffer_size(struct ftgmac100_txdes *txdes,
544 unsigned int len)
545 {
546 txdes->txdes0 |= cpu_to_le32(FTGMAC100_TXDES0_TXBUF_SIZE(len));
547 }
548
549 static void ftgmac100_txdes_set_txint(struct ftgmac100_txdes *txdes)
550 {
551 txdes->txdes1 |= cpu_to_le32(FTGMAC100_TXDES1_TXIC);
552 }
553
554 static void ftgmac100_txdes_set_tcpcs(struct ftgmac100_txdes *txdes)
555 {
556 txdes->txdes1 |= cpu_to_le32(FTGMAC100_TXDES1_TCP_CHKSUM);
557 }
558
559 static void ftgmac100_txdes_set_udpcs(struct ftgmac100_txdes *txdes)
560 {
561 txdes->txdes1 |= cpu_to_le32(FTGMAC100_TXDES1_UDP_CHKSUM);
562 }
563
564 static void ftgmac100_txdes_set_ipcs(struct ftgmac100_txdes *txdes)
565 {
566 txdes->txdes1 |= cpu_to_le32(FTGMAC100_TXDES1_IP_CHKSUM);
567 }
568
569 static void ftgmac100_txdes_set_dma_addr(struct ftgmac100_txdes *txdes,
570 dma_addr_t addr)
571 {
572 txdes->txdes3 = cpu_to_le32(addr);
573 }
574
575 static dma_addr_t ftgmac100_txdes_get_dma_addr(struct ftgmac100_txdes *txdes)
576 {
577 return le32_to_cpu(txdes->txdes3);
578 }
579
580 /*
581 * txdes2 is not used by hardware. We use it to keep track of socket buffer.
582 * Since hardware does not touch it, we can skip cpu_to_le32()/le32_to_cpu().
583 */
584 static void ftgmac100_txdes_set_skb(struct ftgmac100_txdes *txdes,
585 struct sk_buff *skb)
586 {
587 txdes->txdes2 = (unsigned int)skb;
588 }
589
590 static struct sk_buff *ftgmac100_txdes_get_skb(struct ftgmac100_txdes *txdes)
591 {
592 return (struct sk_buff *)txdes->txdes2;
593 }
594
595 /******************************************************************************
596 * internal functions (transmit)
597 *****************************************************************************/
598 static int ftgmac100_next_tx_pointer(int pointer)
599 {
600 return (pointer + 1) & (TX_QUEUE_ENTRIES - 1);
601 }
602
603 static void ftgmac100_tx_pointer_advance(struct ftgmac100 *priv)
604 {
605 priv->tx_pointer = ftgmac100_next_tx_pointer(priv->tx_pointer);
606 }
607
608 static void ftgmac100_tx_clean_pointer_advance(struct ftgmac100 *priv)
609 {
610 priv->tx_clean_pointer = ftgmac100_next_tx_pointer(priv->tx_clean_pointer);
611 }
612
613 static struct ftgmac100_txdes *ftgmac100_current_txdes(struct ftgmac100 *priv)
614 {
615 return &priv->descs->txdes[priv->tx_pointer];
616 }
617
618 static struct ftgmac100_txdes *
619 ftgmac100_current_clean_txdes(struct ftgmac100 *priv)
620 {
621 return &priv->descs->txdes[priv->tx_clean_pointer];
622 }
623
624 static bool ftgmac100_tx_complete_packet(struct ftgmac100 *priv)
625 {
626 struct net_device *netdev = priv->netdev;
627 struct ftgmac100_txdes *txdes;
628 struct sk_buff *skb;
629 dma_addr_t map;
630
631 if (priv->tx_pending == 0)
632 return false;
633
634 txdes = ftgmac100_current_clean_txdes(priv);
635
636 if (ftgmac100_txdes_owned_by_dma(txdes))
637 return false;
638
639 skb = ftgmac100_txdes_get_skb(txdes);
640 map = ftgmac100_txdes_get_dma_addr(txdes);
641
642 netdev->stats.tx_packets++;
643 netdev->stats.tx_bytes += skb->len;
644
645 dma_unmap_single(priv->dev, map, skb_headlen(skb), DMA_TO_DEVICE);
646
647 dev_kfree_skb(skb);
648
649 ftgmac100_txdes_reset(txdes);
650
651 ftgmac100_tx_clean_pointer_advance(priv);
652
653 spin_lock(&priv->tx_lock);
654 priv->tx_pending--;
655 spin_unlock(&priv->tx_lock);
656 netif_wake_queue(netdev);
657
658 return true;
659 }
660
661 static void ftgmac100_tx_complete(struct ftgmac100 *priv)
662 {
663 while (ftgmac100_tx_complete_packet(priv))
664 ;
665 }
666
667 static int ftgmac100_xmit(struct ftgmac100 *priv, struct sk_buff *skb,
668 dma_addr_t map)
669 {
670 struct net_device *netdev = priv->netdev;
671 struct ftgmac100_txdes *txdes;
672 unsigned int len = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len;
673
674 txdes = ftgmac100_current_txdes(priv);
675 ftgmac100_tx_pointer_advance(priv);
676
677 /* setup TX descriptor */
678 ftgmac100_txdes_set_skb(txdes, skb);
679 ftgmac100_txdes_set_dma_addr(txdes, map);
680 ftgmac100_txdes_set_buffer_size(txdes, len);
681
682 ftgmac100_txdes_set_first_segment(txdes);
683 ftgmac100_txdes_set_last_segment(txdes);
684 ftgmac100_txdes_set_txint(txdes);
685 if (skb->ip_summed == CHECKSUM_PARTIAL) {
686 __be16 protocol = skb->protocol;
687
688 if (protocol == cpu_to_be16(ETH_P_IP)) {
689 u8 ip_proto = ip_hdr(skb)->protocol;
690
691 ftgmac100_txdes_set_ipcs(txdes);
692 if (ip_proto == IPPROTO_TCP)
693 ftgmac100_txdes_set_tcpcs(txdes);
694 else if (ip_proto == IPPROTO_UDP)
695 ftgmac100_txdes_set_udpcs(txdes);
696 }
697 }
698
699 spin_lock(&priv->tx_lock);
700 priv->tx_pending++;
701 if (priv->tx_pending == TX_QUEUE_ENTRIES)
702 netif_stop_queue(netdev);
703
704 /* start transmit */
705 ftgmac100_txdes_set_dma_own(txdes);
706 spin_unlock(&priv->tx_lock);
707
708 ftgmac100_txdma_normal_prio_start_polling(priv);
709
710 return NETDEV_TX_OK;
711 }
712
713 /******************************************************************************
714 * internal functions (buffer)
715 *****************************************************************************/
716 static int ftgmac100_alloc_rx_page(struct ftgmac100 *priv,
717 struct ftgmac100_rxdes *rxdes, gfp_t gfp)
718 {
719 struct net_device *netdev = priv->netdev;
720 struct page *page;
721 dma_addr_t map;
722
723 page = alloc_page(gfp);
724 if (!page) {
725 if (net_ratelimit())
726 netdev_err(netdev, "failed to allocate rx page\n");
727 return -ENOMEM;
728 }
729
730 map = dma_map_page(priv->dev, page, 0, RX_BUF_SIZE, DMA_FROM_DEVICE);
731 if (unlikely(dma_mapping_error(priv->dev, map))) {
732 if (net_ratelimit())
733 netdev_err(netdev, "failed to map rx page\n");
734 __free_page(page);
735 return -ENOMEM;
736 }
737
738 ftgmac100_rxdes_set_page(rxdes, page);
739 ftgmac100_rxdes_set_dma_addr(rxdes, map);
740 ftgmac100_rxdes_set_dma_own(rxdes);
741 return 0;
742 }
743
744 static void ftgmac100_free_buffers(struct ftgmac100 *priv)
745 {
746 int i;
747
748 for (i = 0; i < RX_QUEUE_ENTRIES; i++) {
749 struct ftgmac100_rxdes *rxdes = &priv->descs->rxdes[i];
750 struct page *page = ftgmac100_rxdes_get_page(rxdes);
751 dma_addr_t map = ftgmac100_rxdes_get_dma_addr(rxdes);
752
753 if (!page)
754 continue;
755
756 dma_unmap_page(priv->dev, map, RX_BUF_SIZE, DMA_FROM_DEVICE);
757 __free_page(page);
758 }
759
760 for (i = 0; i < TX_QUEUE_ENTRIES; i++) {
761 struct ftgmac100_txdes *txdes = &priv->descs->txdes[i];
762 struct sk_buff *skb = ftgmac100_txdes_get_skb(txdes);
763 dma_addr_t map = ftgmac100_txdes_get_dma_addr(txdes);
764
765 if (!skb)
766 continue;
767
768 dma_unmap_single(priv->dev, map, skb_headlen(skb), DMA_TO_DEVICE);
769 kfree_skb(skb);
770 }
771
772 dma_free_coherent(priv->dev, sizeof(struct ftgmac100_descs),
773 priv->descs, priv->descs_dma_addr);
774 }
775
776 static int ftgmac100_alloc_buffers(struct ftgmac100 *priv)
777 {
778 int i;
779
780 priv->descs = dma_zalloc_coherent(priv->dev,
781 sizeof(struct ftgmac100_descs),
782 &priv->descs_dma_addr, GFP_KERNEL);
783 if (!priv->descs)
784 return -ENOMEM;
785
786 /* initialize RX ring */
787 ftgmac100_rxdes_set_end_of_ring(&priv->descs->rxdes[RX_QUEUE_ENTRIES - 1]);
788
789 for (i = 0; i < RX_QUEUE_ENTRIES; i++) {
790 struct ftgmac100_rxdes *rxdes = &priv->descs->rxdes[i];
791
792 if (ftgmac100_alloc_rx_page(priv, rxdes, GFP_KERNEL))
793 goto err;
794 }
795
796 /* initialize TX ring */
797 ftgmac100_txdes_set_end_of_ring(&priv->descs->txdes[TX_QUEUE_ENTRIES - 1]);
798 return 0;
799
800 err:
801 ftgmac100_free_buffers(priv);
802 return -ENOMEM;
803 }
804
805 /******************************************************************************
806 * internal functions (mdio)
807 *****************************************************************************/
808 static void ftgmac100_adjust_link(struct net_device *netdev)
809 {
810 struct ftgmac100 *priv = netdev_priv(netdev);
811 struct phy_device *phydev = priv->phydev;
812 int ier;
813
814 if (phydev->speed == priv->old_speed)
815 return;
816
817 priv->old_speed = phydev->speed;
818
819 ier = ioread32(priv->base + FTGMAC100_OFFSET_IER);
820
821 /* disable all interrupts */
822 iowrite32(0, priv->base + FTGMAC100_OFFSET_IER);
823
824 netif_stop_queue(netdev);
825 ftgmac100_stop_hw(priv);
826
827 netif_start_queue(netdev);
828 ftgmac100_init_hw(priv);
829 ftgmac100_start_hw(priv, phydev->speed);
830
831 /* re-enable interrupts */
832 iowrite32(ier, priv->base + FTGMAC100_OFFSET_IER);
833 }
834
835 static int ftgmac100_mii_probe(struct ftgmac100 *priv)
836 {
837 struct net_device *netdev = priv->netdev;
838 struct phy_device *phydev = NULL;
839 int i;
840
841 /* search for connect PHY device */
842 for (i = 0; i < PHY_MAX_ADDR; i++) {
843 struct phy_device *tmp = priv->mii_bus->phy_map[i];
844
845 if (tmp) {
846 phydev = tmp;
847 break;
848 }
849 }
850
851 /* now we are supposed to have a proper phydev, to attach to... */
852 if (!phydev) {
853 netdev_info(netdev, "%s: no PHY found\n", netdev->name);
854 return -ENODEV;
855 }
856
857 phydev = phy_connect(netdev, dev_name(&phydev->dev),
858 &ftgmac100_adjust_link, PHY_INTERFACE_MODE_GMII);
859
860 if (IS_ERR(phydev)) {
861 netdev_err(netdev, "%s: Could not attach to PHY\n", netdev->name);
862 return PTR_ERR(phydev);
863 }
864
865 priv->phydev = phydev;
866 return 0;
867 }
868
869 /******************************************************************************
870 * struct mii_bus functions
871 *****************************************************************************/
872 static int ftgmac100_mdiobus_read(struct mii_bus *bus, int phy_addr, int regnum)
873 {
874 struct net_device *netdev = bus->priv;
875 struct ftgmac100 *priv = netdev_priv(netdev);
876 unsigned int phycr;
877 int i;
878
879 phycr = ioread32(priv->base + FTGMAC100_OFFSET_PHYCR);
880
881 /* preserve MDC cycle threshold */
882 phycr &= FTGMAC100_PHYCR_MDC_CYCTHR_MASK;
883
884 phycr |= FTGMAC100_PHYCR_PHYAD(phy_addr) |
885 FTGMAC100_PHYCR_REGAD(regnum) |
886 FTGMAC100_PHYCR_MIIRD;
887
888 iowrite32(phycr, priv->base + FTGMAC100_OFFSET_PHYCR);
889
890 for (i = 0; i < 10; i++) {
891 phycr = ioread32(priv->base + FTGMAC100_OFFSET_PHYCR);
892
893 if ((phycr & FTGMAC100_PHYCR_MIIRD) == 0) {
894 int data;
895
896 data = ioread32(priv->base + FTGMAC100_OFFSET_PHYDATA);
897 return FTGMAC100_PHYDATA_MIIRDATA(data);
898 }
899
900 udelay(100);
901 }
902
903 netdev_err(netdev, "mdio read timed out\n");
904 return -EIO;
905 }
906
907 static int ftgmac100_mdiobus_write(struct mii_bus *bus, int phy_addr,
908 int regnum, u16 value)
909 {
910 struct net_device *netdev = bus->priv;
911 struct ftgmac100 *priv = netdev_priv(netdev);
912 unsigned int phycr;
913 int data;
914 int i;
915
916 phycr = ioread32(priv->base + FTGMAC100_OFFSET_PHYCR);
917
918 /* preserve MDC cycle threshold */
919 phycr &= FTGMAC100_PHYCR_MDC_CYCTHR_MASK;
920
921 phycr |= FTGMAC100_PHYCR_PHYAD(phy_addr) |
922 FTGMAC100_PHYCR_REGAD(regnum) |
923 FTGMAC100_PHYCR_MIIWR;
924
925 data = FTGMAC100_PHYDATA_MIIWDATA(value);
926
927 iowrite32(data, priv->base + FTGMAC100_OFFSET_PHYDATA);
928 iowrite32(phycr, priv->base + FTGMAC100_OFFSET_PHYCR);
929
930 for (i = 0; i < 10; i++) {
931 phycr = ioread32(priv->base + FTGMAC100_OFFSET_PHYCR);
932
933 if ((phycr & FTGMAC100_PHYCR_MIIWR) == 0)
934 return 0;
935
936 udelay(100);
937 }
938
939 netdev_err(netdev, "mdio write timed out\n");
940 return -EIO;
941 }
942
943 /******************************************************************************
944 * struct ethtool_ops functions
945 *****************************************************************************/
946 static void ftgmac100_get_drvinfo(struct net_device *netdev,
947 struct ethtool_drvinfo *info)
948 {
949 strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
950 strlcpy(info->version, DRV_VERSION, sizeof(info->version));
951 strlcpy(info->bus_info, dev_name(&netdev->dev), sizeof(info->bus_info));
952 }
953
954 static int ftgmac100_get_settings(struct net_device *netdev,
955 struct ethtool_cmd *cmd)
956 {
957 struct ftgmac100 *priv = netdev_priv(netdev);
958
959 return phy_ethtool_gset(priv->phydev, cmd);
960 }
961
962 static int ftgmac100_set_settings(struct net_device *netdev,
963 struct ethtool_cmd *cmd)
964 {
965 struct ftgmac100 *priv = netdev_priv(netdev);
966
967 return phy_ethtool_sset(priv->phydev, cmd);
968 }
969
970 static const struct ethtool_ops ftgmac100_ethtool_ops = {
971 .set_settings = ftgmac100_set_settings,
972 .get_settings = ftgmac100_get_settings,
973 .get_drvinfo = ftgmac100_get_drvinfo,
974 .get_link = ethtool_op_get_link,
975 };
976
977 /******************************************************************************
978 * interrupt handler
979 *****************************************************************************/
980 static irqreturn_t ftgmac100_interrupt(int irq, void *dev_id)
981 {
982 struct net_device *netdev = dev_id;
983 struct ftgmac100 *priv = netdev_priv(netdev);
984
985 if (likely(netif_running(netdev))) {
986 /* Disable interrupts for polling */
987 iowrite32(0, priv->base + FTGMAC100_OFFSET_IER);
988 napi_schedule(&priv->napi);
989 }
990
991 return IRQ_HANDLED;
992 }
993
994 /******************************************************************************
995 * struct napi_struct functions
996 *****************************************************************************/
997 static int ftgmac100_poll(struct napi_struct *napi, int budget)
998 {
999 struct ftgmac100 *priv = container_of(napi, struct ftgmac100, napi);
1000 struct net_device *netdev = priv->netdev;
1001 unsigned int status;
1002 bool completed = true;
1003 int rx = 0;
1004
1005 status = ioread32(priv->base + FTGMAC100_OFFSET_ISR);
1006 iowrite32(status, priv->base + FTGMAC100_OFFSET_ISR);
1007
1008 if (status & (FTGMAC100_INT_RPKT_BUF | FTGMAC100_INT_NO_RXBUF)) {
1009 /*
1010 * FTGMAC100_INT_RPKT_BUF:
1011 * RX DMA has received packets into RX buffer successfully
1012 *
1013 * FTGMAC100_INT_NO_RXBUF:
1014 * RX buffer unavailable
1015 */
1016 bool retry;
1017
1018 do {
1019 retry = ftgmac100_rx_packet(priv, &rx);
1020 } while (retry && rx < budget);
1021
1022 if (retry && rx == budget)
1023 completed = false;
1024 }
1025
1026 if (status & (FTGMAC100_INT_XPKT_ETH | FTGMAC100_INT_XPKT_LOST)) {
1027 /*
1028 * FTGMAC100_INT_XPKT_ETH:
1029 * packet transmitted to ethernet successfully
1030 *
1031 * FTGMAC100_INT_XPKT_LOST:
1032 * packet transmitted to ethernet lost due to late
1033 * collision or excessive collision
1034 */
1035 ftgmac100_tx_complete(priv);
1036 }
1037
1038 if (status & (FTGMAC100_INT_NO_RXBUF | FTGMAC100_INT_RPKT_LOST |
1039 FTGMAC100_INT_AHB_ERR | FTGMAC100_INT_PHYSTS_CHG)) {
1040 if (net_ratelimit())
1041 netdev_info(netdev, "[ISR] = 0x%x: %s%s%s%s\n", status,
1042 status & FTGMAC100_INT_NO_RXBUF ? "NO_RXBUF " : "",
1043 status & FTGMAC100_INT_RPKT_LOST ? "RPKT_LOST " : "",
1044 status & FTGMAC100_INT_AHB_ERR ? "AHB_ERR " : "",
1045 status & FTGMAC100_INT_PHYSTS_CHG ? "PHYSTS_CHG" : "");
1046
1047 if (status & FTGMAC100_INT_NO_RXBUF) {
1048 /* RX buffer unavailable */
1049 netdev->stats.rx_over_errors++;
1050 }
1051
1052 if (status & FTGMAC100_INT_RPKT_LOST) {
1053 /* received packet lost due to RX FIFO full */
1054 netdev->stats.rx_fifo_errors++;
1055 }
1056 }
1057
1058 if (completed) {
1059 napi_complete(napi);
1060
1061 /* enable all interrupts */
1062 iowrite32(INT_MASK_ALL_ENABLED, priv->base + FTGMAC100_OFFSET_IER);
1063 }
1064
1065 return rx;
1066 }
1067
1068 /******************************************************************************
1069 * struct net_device_ops functions
1070 *****************************************************************************/
1071 static int ftgmac100_open(struct net_device *netdev)
1072 {
1073 struct ftgmac100 *priv = netdev_priv(netdev);
1074 int err;
1075
1076 err = ftgmac100_alloc_buffers(priv);
1077 if (err) {
1078 netdev_err(netdev, "failed to allocate buffers\n");
1079 goto err_alloc;
1080 }
1081
1082 err = request_irq(priv->irq, ftgmac100_interrupt, 0, netdev->name, netdev);
1083 if (err) {
1084 netdev_err(netdev, "failed to request irq %d\n", priv->irq);
1085 goto err_irq;
1086 }
1087
1088 priv->rx_pointer = 0;
1089 priv->tx_clean_pointer = 0;
1090 priv->tx_pointer = 0;
1091 priv->tx_pending = 0;
1092
1093 err = ftgmac100_reset_hw(priv);
1094 if (err)
1095 goto err_hw;
1096
1097 ftgmac100_init_hw(priv);
1098 ftgmac100_start_hw(priv, 10);
1099
1100 phy_start(priv->phydev);
1101
1102 napi_enable(&priv->napi);
1103 netif_start_queue(netdev);
1104
1105 /* enable all interrupts */
1106 iowrite32(INT_MASK_ALL_ENABLED, priv->base + FTGMAC100_OFFSET_IER);
1107 return 0;
1108
1109 err_hw:
1110 free_irq(priv->irq, netdev);
1111 err_irq:
1112 ftgmac100_free_buffers(priv);
1113 err_alloc:
1114 return err;
1115 }
1116
1117 static int ftgmac100_stop(struct net_device *netdev)
1118 {
1119 struct ftgmac100 *priv = netdev_priv(netdev);
1120
1121 /* disable all interrupts */
1122 iowrite32(0, priv->base + FTGMAC100_OFFSET_IER);
1123
1124 netif_stop_queue(netdev);
1125 napi_disable(&priv->napi);
1126 phy_stop(priv->phydev);
1127
1128 ftgmac100_stop_hw(priv);
1129 free_irq(priv->irq, netdev);
1130 ftgmac100_free_buffers(priv);
1131
1132 return 0;
1133 }
1134
1135 static int ftgmac100_hard_start_xmit(struct sk_buff *skb,
1136 struct net_device *netdev)
1137 {
1138 struct ftgmac100 *priv = netdev_priv(netdev);
1139 dma_addr_t map;
1140
1141 if (unlikely(skb->len > MAX_PKT_SIZE)) {
1142 if (net_ratelimit())
1143 netdev_dbg(netdev, "tx packet too big\n");
1144
1145 netdev->stats.tx_dropped++;
1146 kfree_skb(skb);
1147 return NETDEV_TX_OK;
1148 }
1149
1150 map = dma_map_single(priv->dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE);
1151 if (unlikely(dma_mapping_error(priv->dev, map))) {
1152 /* drop packet */
1153 if (net_ratelimit())
1154 netdev_err(netdev, "map socket buffer failed\n");
1155
1156 netdev->stats.tx_dropped++;
1157 kfree_skb(skb);
1158 return NETDEV_TX_OK;
1159 }
1160
1161 return ftgmac100_xmit(priv, skb, map);
1162 }
1163
1164 /* optional */
1165 static int ftgmac100_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1166 {
1167 struct ftgmac100 *priv = netdev_priv(netdev);
1168
1169 return phy_mii_ioctl(priv->phydev, ifr, cmd);
1170 }
1171
1172 static const struct net_device_ops ftgmac100_netdev_ops = {
1173 .ndo_open = ftgmac100_open,
1174 .ndo_stop = ftgmac100_stop,
1175 .ndo_start_xmit = ftgmac100_hard_start_xmit,
1176 .ndo_set_mac_address = eth_mac_addr,
1177 .ndo_validate_addr = eth_validate_addr,
1178 .ndo_do_ioctl = ftgmac100_do_ioctl,
1179 };
1180
1181 /******************************************************************************
1182 * struct platform_driver functions
1183 *****************************************************************************/
1184 static int ftgmac100_probe(struct platform_device *pdev)
1185 {
1186 struct resource *res;
1187 int irq;
1188 struct net_device *netdev;
1189 struct ftgmac100 *priv;
1190 int err;
1191 int i;
1192
1193 if (!pdev)
1194 return -ENODEV;
1195
1196 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1197 if (!res)
1198 return -ENXIO;
1199
1200 irq = platform_get_irq(pdev, 0);
1201 if (irq < 0)
1202 return irq;
1203
1204 /* setup net_device */
1205 netdev = alloc_etherdev(sizeof(*priv));
1206 if (!netdev) {
1207 err = -ENOMEM;
1208 goto err_alloc_etherdev;
1209 }
1210
1211 SET_NETDEV_DEV(netdev, &pdev->dev);
1212
1213 netdev->ethtool_ops = &ftgmac100_ethtool_ops;
1214 netdev->netdev_ops = &ftgmac100_netdev_ops;
1215 netdev->features = NETIF_F_IP_CSUM | NETIF_F_GRO;
1216
1217 platform_set_drvdata(pdev, netdev);
1218
1219 /* setup private data */
1220 priv = netdev_priv(netdev);
1221 priv->netdev = netdev;
1222 priv->dev = &pdev->dev;
1223
1224 spin_lock_init(&priv->tx_lock);
1225
1226 /* initialize NAPI */
1227 netif_napi_add(netdev, &priv->napi, ftgmac100_poll, 64);
1228
1229 /* map io memory */
1230 priv->res = request_mem_region(res->start, resource_size(res),
1231 dev_name(&pdev->dev));
1232 if (!priv->res) {
1233 dev_err(&pdev->dev, "Could not reserve memory region\n");
1234 err = -ENOMEM;
1235 goto err_req_mem;
1236 }
1237
1238 priv->base = ioremap(res->start, resource_size(res));
1239 if (!priv->base) {
1240 dev_err(&pdev->dev, "Failed to ioremap ethernet registers\n");
1241 err = -EIO;
1242 goto err_ioremap;
1243 }
1244
1245 priv->irq = irq;
1246
1247 /* initialize mdio bus */
1248 priv->mii_bus = mdiobus_alloc();
1249 if (!priv->mii_bus) {
1250 err = -EIO;
1251 goto err_alloc_mdiobus;
1252 }
1253
1254 priv->mii_bus->name = "ftgmac100_mdio";
1255 snprintf(priv->mii_bus->id, MII_BUS_ID_SIZE, "ftgmac100_mii");
1256
1257 priv->mii_bus->priv = netdev;
1258 priv->mii_bus->read = ftgmac100_mdiobus_read;
1259 priv->mii_bus->write = ftgmac100_mdiobus_write;
1260 priv->mii_bus->irq = priv->phy_irq;
1261
1262 for (i = 0; i < PHY_MAX_ADDR; i++)
1263 priv->mii_bus->irq[i] = PHY_POLL;
1264
1265 err = mdiobus_register(priv->mii_bus);
1266 if (err) {
1267 dev_err(&pdev->dev, "Cannot register MDIO bus!\n");
1268 goto err_register_mdiobus;
1269 }
1270
1271 err = ftgmac100_mii_probe(priv);
1272 if (err) {
1273 dev_err(&pdev->dev, "MII Probe failed!\n");
1274 goto err_mii_probe;
1275 }
1276
1277 /* register network device */
1278 err = register_netdev(netdev);
1279 if (err) {
1280 dev_err(&pdev->dev, "Failed to register netdev\n");
1281 goto err_register_netdev;
1282 }
1283
1284 netdev_info(netdev, "irq %d, mapped at %p\n", priv->irq, priv->base);
1285
1286 if (!is_valid_ether_addr(netdev->dev_addr)) {
1287 eth_hw_addr_random(netdev);
1288 netdev_info(netdev, "generated random MAC address %pM\n",
1289 netdev->dev_addr);
1290 }
1291
1292 return 0;
1293
1294 err_register_netdev:
1295 phy_disconnect(priv->phydev);
1296 err_mii_probe:
1297 mdiobus_unregister(priv->mii_bus);
1298 err_register_mdiobus:
1299 mdiobus_free(priv->mii_bus);
1300 err_alloc_mdiobus:
1301 iounmap(priv->base);
1302 err_ioremap:
1303 release_resource(priv->res);
1304 err_req_mem:
1305 netif_napi_del(&priv->napi);
1306 free_netdev(netdev);
1307 err_alloc_etherdev:
1308 return err;
1309 }
1310
1311 static int __exit ftgmac100_remove(struct platform_device *pdev)
1312 {
1313 struct net_device *netdev;
1314 struct ftgmac100 *priv;
1315
1316 netdev = platform_get_drvdata(pdev);
1317 priv = netdev_priv(netdev);
1318
1319 unregister_netdev(netdev);
1320
1321 phy_disconnect(priv->phydev);
1322 mdiobus_unregister(priv->mii_bus);
1323 mdiobus_free(priv->mii_bus);
1324
1325 iounmap(priv->base);
1326 release_resource(priv->res);
1327
1328 netif_napi_del(&priv->napi);
1329 free_netdev(netdev);
1330 return 0;
1331 }
1332
1333 static struct platform_driver ftgmac100_driver = {
1334 .probe = ftgmac100_probe,
1335 .remove = __exit_p(ftgmac100_remove),
1336 .driver = {
1337 .name = DRV_NAME,
1338 },
1339 };
1340
1341 module_platform_driver(ftgmac100_driver);
1342
1343 MODULE_AUTHOR("Po-Yu Chuang <ratbert@faraday-tech.com>");
1344 MODULE_DESCRIPTION("FTGMAC100 driver");
1345 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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