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Merge tag 'drm-intel-fixes-2013-07-11' of git://people.freedesktop.org/~danvet/drm...
[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/init.h>
28 #include <linux/interrupt.h>
29 #include <linux/io.h>
30 #include <linux/module.h>
31 #include <linux/netdevice.h>
32 #include <linux/phy.h>
33 #include <linux/platform_device.h>
34 #include <net/ip.h>
35
36 #include "ftgmac100.h"
37
38 #define DRV_NAME "ftgmac100"
39 #define DRV_VERSION "0.7"
40
41 #define RX_QUEUE_ENTRIES 256 /* must be power of 2 */
42 #define TX_QUEUE_ENTRIES 512 /* must be power of 2 */
43
44 #define MAX_PKT_SIZE 1518
45 #define RX_BUF_SIZE PAGE_SIZE /* must be smaller than 0x3fff */
46
47 /******************************************************************************
48 * private data
49 *****************************************************************************/
50 struct ftgmac100_descs {
51 struct ftgmac100_rxdes rxdes[RX_QUEUE_ENTRIES];
52 struct ftgmac100_txdes txdes[TX_QUEUE_ENTRIES];
53 };
54
55 struct ftgmac100 {
56 struct resource *res;
57 void __iomem *base;
58 int irq;
59
60 struct ftgmac100_descs *descs;
61 dma_addr_t descs_dma_addr;
62
63 unsigned int rx_pointer;
64 unsigned int tx_clean_pointer;
65 unsigned int tx_pointer;
66 unsigned int tx_pending;
67
68 spinlock_t tx_lock;
69
70 struct net_device *netdev;
71 struct device *dev;
72 struct napi_struct napi;
73
74 struct mii_bus *mii_bus;
75 int phy_irq[PHY_MAX_ADDR];
76 struct phy_device *phydev;
77 int old_speed;
78 };
79
80 static int ftgmac100_alloc_rx_page(struct ftgmac100 *priv,
81 struct ftgmac100_rxdes *rxdes, gfp_t gfp);
82
83 /******************************************************************************
84 * internal functions (hardware register access)
85 *****************************************************************************/
86 #define INT_MASK_ALL_ENABLED (FTGMAC100_INT_RPKT_LOST | \
87 FTGMAC100_INT_XPKT_ETH | \
88 FTGMAC100_INT_XPKT_LOST | \
89 FTGMAC100_INT_AHB_ERR | \
90 FTGMAC100_INT_PHYSTS_CHG | \
91 FTGMAC100_INT_RPKT_BUF | \
92 FTGMAC100_INT_NO_RXBUF)
93
94 static void ftgmac100_set_rx_ring_base(struct ftgmac100 *priv, dma_addr_t addr)
95 {
96 iowrite32(addr, priv->base + FTGMAC100_OFFSET_RXR_BADR);
97 }
98
99 static void ftgmac100_set_rx_buffer_size(struct ftgmac100 *priv,
100 unsigned int size)
101 {
102 size = FTGMAC100_RBSR_SIZE(size);
103 iowrite32(size, priv->base + FTGMAC100_OFFSET_RBSR);
104 }
105
106 static void ftgmac100_set_normal_prio_tx_ring_base(struct ftgmac100 *priv,
107 dma_addr_t addr)
108 {
109 iowrite32(addr, priv->base + FTGMAC100_OFFSET_NPTXR_BADR);
110 }
111
112 static void ftgmac100_txdma_normal_prio_start_polling(struct ftgmac100 *priv)
113 {
114 iowrite32(1, priv->base + FTGMAC100_OFFSET_NPTXPD);
115 }
116
117 static int ftgmac100_reset_hw(struct ftgmac100 *priv)
118 {
119 struct net_device *netdev = priv->netdev;
120 int i;
121
122 /* NOTE: reset clears all registers */
123 iowrite32(FTGMAC100_MACCR_SW_RST, priv->base + FTGMAC100_OFFSET_MACCR);
124 for (i = 0; i < 5; i++) {
125 unsigned int maccr;
126
127 maccr = ioread32(priv->base + FTGMAC100_OFFSET_MACCR);
128 if (!(maccr & FTGMAC100_MACCR_SW_RST))
129 return 0;
130
131 udelay(1000);
132 }
133
134 netdev_err(netdev, "software reset failed\n");
135 return -EIO;
136 }
137
138 static void ftgmac100_set_mac(struct ftgmac100 *priv, const unsigned char *mac)
139 {
140 unsigned int maddr = mac[0] << 8 | mac[1];
141 unsigned int laddr = mac[2] << 24 | mac[3] << 16 | mac[4] << 8 | mac[5];
142
143 iowrite32(maddr, priv->base + FTGMAC100_OFFSET_MAC_MADR);
144 iowrite32(laddr, priv->base + FTGMAC100_OFFSET_MAC_LADR);
145 }
146
147 static void ftgmac100_init_hw(struct ftgmac100 *priv)
148 {
149 /* setup ring buffer base registers */
150 ftgmac100_set_rx_ring_base(priv,
151 priv->descs_dma_addr +
152 offsetof(struct ftgmac100_descs, rxdes));
153 ftgmac100_set_normal_prio_tx_ring_base(priv,
154 priv->descs_dma_addr +
155 offsetof(struct ftgmac100_descs, txdes));
156
157 ftgmac100_set_rx_buffer_size(priv, RX_BUF_SIZE);
158
159 iowrite32(FTGMAC100_APTC_RXPOLL_CNT(1), priv->base + FTGMAC100_OFFSET_APTC);
160
161 ftgmac100_set_mac(priv, priv->netdev->dev_addr);
162 }
163
164 #define MACCR_ENABLE_ALL (FTGMAC100_MACCR_TXDMA_EN | \
165 FTGMAC100_MACCR_RXDMA_EN | \
166 FTGMAC100_MACCR_TXMAC_EN | \
167 FTGMAC100_MACCR_RXMAC_EN | \
168 FTGMAC100_MACCR_FULLDUP | \
169 FTGMAC100_MACCR_CRC_APD | \
170 FTGMAC100_MACCR_RX_RUNT | \
171 FTGMAC100_MACCR_RX_BROADPKT)
172
173 static void ftgmac100_start_hw(struct ftgmac100 *priv, int speed)
174 {
175 int maccr = MACCR_ENABLE_ALL;
176
177 switch (speed) {
178 default:
179 case 10:
180 break;
181
182 case 100:
183 maccr |= FTGMAC100_MACCR_FAST_MODE;
184 break;
185
186 case 1000:
187 maccr |= FTGMAC100_MACCR_GIGA_MODE;
188 break;
189 }
190
191 iowrite32(maccr, priv->base + FTGMAC100_OFFSET_MACCR);
192 }
193
194 static void ftgmac100_stop_hw(struct ftgmac100 *priv)
195 {
196 iowrite32(0, priv->base + FTGMAC100_OFFSET_MACCR);
197 }
198
199 /******************************************************************************
200 * internal functions (receive descriptor)
201 *****************************************************************************/
202 static bool ftgmac100_rxdes_first_segment(struct ftgmac100_rxdes *rxdes)
203 {
204 return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_FRS);
205 }
206
207 static bool ftgmac100_rxdes_last_segment(struct ftgmac100_rxdes *rxdes)
208 {
209 return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_LRS);
210 }
211
212 static bool ftgmac100_rxdes_packet_ready(struct ftgmac100_rxdes *rxdes)
213 {
214 return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_RXPKT_RDY);
215 }
216
217 static void ftgmac100_rxdes_set_dma_own(struct ftgmac100_rxdes *rxdes)
218 {
219 /* clear status bits */
220 rxdes->rxdes0 &= cpu_to_le32(FTGMAC100_RXDES0_EDORR);
221 }
222
223 static bool ftgmac100_rxdes_rx_error(struct ftgmac100_rxdes *rxdes)
224 {
225 return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_RX_ERR);
226 }
227
228 static bool ftgmac100_rxdes_crc_error(struct ftgmac100_rxdes *rxdes)
229 {
230 return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_CRC_ERR);
231 }
232
233 static bool ftgmac100_rxdes_frame_too_long(struct ftgmac100_rxdes *rxdes)
234 {
235 return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_FTL);
236 }
237
238 static bool ftgmac100_rxdes_runt(struct ftgmac100_rxdes *rxdes)
239 {
240 return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_RUNT);
241 }
242
243 static bool ftgmac100_rxdes_odd_nibble(struct ftgmac100_rxdes *rxdes)
244 {
245 return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_RX_ODD_NB);
246 }
247
248 static unsigned int ftgmac100_rxdes_data_length(struct ftgmac100_rxdes *rxdes)
249 {
250 return le32_to_cpu(rxdes->rxdes0) & FTGMAC100_RXDES0_VDBC;
251 }
252
253 static bool ftgmac100_rxdes_multicast(struct ftgmac100_rxdes *rxdes)
254 {
255 return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_MULTICAST);
256 }
257
258 static void ftgmac100_rxdes_set_end_of_ring(struct ftgmac100_rxdes *rxdes)
259 {
260 rxdes->rxdes0 |= cpu_to_le32(FTGMAC100_RXDES0_EDORR);
261 }
262
263 static void ftgmac100_rxdes_set_dma_addr(struct ftgmac100_rxdes *rxdes,
264 dma_addr_t addr)
265 {
266 rxdes->rxdes3 = cpu_to_le32(addr);
267 }
268
269 static dma_addr_t ftgmac100_rxdes_get_dma_addr(struct ftgmac100_rxdes *rxdes)
270 {
271 return le32_to_cpu(rxdes->rxdes3);
272 }
273
274 static bool ftgmac100_rxdes_is_tcp(struct ftgmac100_rxdes *rxdes)
275 {
276 return (rxdes->rxdes1 & cpu_to_le32(FTGMAC100_RXDES1_PROT_MASK)) ==
277 cpu_to_le32(FTGMAC100_RXDES1_PROT_TCPIP);
278 }
279
280 static bool ftgmac100_rxdes_is_udp(struct ftgmac100_rxdes *rxdes)
281 {
282 return (rxdes->rxdes1 & cpu_to_le32(FTGMAC100_RXDES1_PROT_MASK)) ==
283 cpu_to_le32(FTGMAC100_RXDES1_PROT_UDPIP);
284 }
285
286 static bool ftgmac100_rxdes_tcpcs_err(struct ftgmac100_rxdes *rxdes)
287 {
288 return rxdes->rxdes1 & cpu_to_le32(FTGMAC100_RXDES1_TCP_CHKSUM_ERR);
289 }
290
291 static bool ftgmac100_rxdes_udpcs_err(struct ftgmac100_rxdes *rxdes)
292 {
293 return rxdes->rxdes1 & cpu_to_le32(FTGMAC100_RXDES1_UDP_CHKSUM_ERR);
294 }
295
296 static bool ftgmac100_rxdes_ipcs_err(struct ftgmac100_rxdes *rxdes)
297 {
298 return rxdes->rxdes1 & cpu_to_le32(FTGMAC100_RXDES1_IP_CHKSUM_ERR);
299 }
300
301 /*
302 * rxdes2 is not used by hardware. We use it to keep track of page.
303 * Since hardware does not touch it, we can skip cpu_to_le32()/le32_to_cpu().
304 */
305 static void ftgmac100_rxdes_set_page(struct ftgmac100_rxdes *rxdes, struct page *page)
306 {
307 rxdes->rxdes2 = (unsigned int)page;
308 }
309
310 static struct page *ftgmac100_rxdes_get_page(struct ftgmac100_rxdes *rxdes)
311 {
312 return (struct page *)rxdes->rxdes2;
313 }
314
315 /******************************************************************************
316 * internal functions (receive)
317 *****************************************************************************/
318 static int ftgmac100_next_rx_pointer(int pointer)
319 {
320 return (pointer + 1) & (RX_QUEUE_ENTRIES - 1);
321 }
322
323 static void ftgmac100_rx_pointer_advance(struct ftgmac100 *priv)
324 {
325 priv->rx_pointer = ftgmac100_next_rx_pointer(priv->rx_pointer);
326 }
327
328 static struct ftgmac100_rxdes *ftgmac100_current_rxdes(struct ftgmac100 *priv)
329 {
330 return &priv->descs->rxdes[priv->rx_pointer];
331 }
332
333 static struct ftgmac100_rxdes *
334 ftgmac100_rx_locate_first_segment(struct ftgmac100 *priv)
335 {
336 struct ftgmac100_rxdes *rxdes = ftgmac100_current_rxdes(priv);
337
338 while (ftgmac100_rxdes_packet_ready(rxdes)) {
339 if (ftgmac100_rxdes_first_segment(rxdes))
340 return rxdes;
341
342 ftgmac100_rxdes_set_dma_own(rxdes);
343 ftgmac100_rx_pointer_advance(priv);
344 rxdes = ftgmac100_current_rxdes(priv);
345 }
346
347 return NULL;
348 }
349
350 static bool ftgmac100_rx_packet_error(struct ftgmac100 *priv,
351 struct ftgmac100_rxdes *rxdes)
352 {
353 struct net_device *netdev = priv->netdev;
354 bool error = false;
355
356 if (unlikely(ftgmac100_rxdes_rx_error(rxdes))) {
357 if (net_ratelimit())
358 netdev_info(netdev, "rx err\n");
359
360 netdev->stats.rx_errors++;
361 error = true;
362 }
363
364 if (unlikely(ftgmac100_rxdes_crc_error(rxdes))) {
365 if (net_ratelimit())
366 netdev_info(netdev, "rx crc err\n");
367
368 netdev->stats.rx_crc_errors++;
369 error = true;
370 } else if (unlikely(ftgmac100_rxdes_ipcs_err(rxdes))) {
371 if (net_ratelimit())
372 netdev_info(netdev, "rx IP checksum err\n");
373
374 error = true;
375 }
376
377 if (unlikely(ftgmac100_rxdes_frame_too_long(rxdes))) {
378 if (net_ratelimit())
379 netdev_info(netdev, "rx frame too long\n");
380
381 netdev->stats.rx_length_errors++;
382 error = true;
383 } else if (unlikely(ftgmac100_rxdes_runt(rxdes))) {
384 if (net_ratelimit())
385 netdev_info(netdev, "rx runt\n");
386
387 netdev->stats.rx_length_errors++;
388 error = true;
389 } else if (unlikely(ftgmac100_rxdes_odd_nibble(rxdes))) {
390 if (net_ratelimit())
391 netdev_info(netdev, "rx odd nibble\n");
392
393 netdev->stats.rx_length_errors++;
394 error = true;
395 }
396
397 return error;
398 }
399
400 static void ftgmac100_rx_drop_packet(struct ftgmac100 *priv)
401 {
402 struct net_device *netdev = priv->netdev;
403 struct ftgmac100_rxdes *rxdes = ftgmac100_current_rxdes(priv);
404 bool done = false;
405
406 if (net_ratelimit())
407 netdev_dbg(netdev, "drop packet %p\n", rxdes);
408
409 do {
410 if (ftgmac100_rxdes_last_segment(rxdes))
411 done = true;
412
413 ftgmac100_rxdes_set_dma_own(rxdes);
414 ftgmac100_rx_pointer_advance(priv);
415 rxdes = ftgmac100_current_rxdes(priv);
416 } while (!done && ftgmac100_rxdes_packet_ready(rxdes));
417
418 netdev->stats.rx_dropped++;
419 }
420
421 static bool ftgmac100_rx_packet(struct ftgmac100 *priv, int *processed)
422 {
423 struct net_device *netdev = priv->netdev;
424 struct ftgmac100_rxdes *rxdes;
425 struct sk_buff *skb;
426 bool done = false;
427
428 rxdes = ftgmac100_rx_locate_first_segment(priv);
429 if (!rxdes)
430 return false;
431
432 if (unlikely(ftgmac100_rx_packet_error(priv, rxdes))) {
433 ftgmac100_rx_drop_packet(priv);
434 return true;
435 }
436
437 /* start processing */
438 skb = netdev_alloc_skb_ip_align(netdev, 128);
439 if (unlikely(!skb)) {
440 if (net_ratelimit())
441 netdev_err(netdev, "rx skb alloc failed\n");
442
443 ftgmac100_rx_drop_packet(priv);
444 return true;
445 }
446
447 if (unlikely(ftgmac100_rxdes_multicast(rxdes)))
448 netdev->stats.multicast++;
449
450 /*
451 * It seems that HW does checksum incorrectly with fragmented packets,
452 * so we are conservative here - if HW checksum error, let software do
453 * the checksum again.
454 */
455 if ((ftgmac100_rxdes_is_tcp(rxdes) && !ftgmac100_rxdes_tcpcs_err(rxdes)) ||
456 (ftgmac100_rxdes_is_udp(rxdes) && !ftgmac100_rxdes_udpcs_err(rxdes)))
457 skb->ip_summed = CHECKSUM_UNNECESSARY;
458
459 do {
460 dma_addr_t map = ftgmac100_rxdes_get_dma_addr(rxdes);
461 struct page *page = ftgmac100_rxdes_get_page(rxdes);
462 unsigned int size;
463
464 dma_unmap_page(priv->dev, map, RX_BUF_SIZE, DMA_FROM_DEVICE);
465
466 size = ftgmac100_rxdes_data_length(rxdes);
467 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page, 0, size);
468
469 skb->len += size;
470 skb->data_len += size;
471 skb->truesize += PAGE_SIZE;
472
473 if (ftgmac100_rxdes_last_segment(rxdes))
474 done = true;
475
476 ftgmac100_alloc_rx_page(priv, rxdes, GFP_ATOMIC);
477
478 ftgmac100_rx_pointer_advance(priv);
479 rxdes = ftgmac100_current_rxdes(priv);
480 } while (!done);
481
482 /* Small frames are copied into linear part of skb to free one page */
483 if (skb->len <= 128) {
484 skb->truesize -= PAGE_SIZE;
485 __pskb_pull_tail(skb, skb->len);
486 } else {
487 /* We pull the minimum amount into linear part */
488 __pskb_pull_tail(skb, ETH_HLEN);
489 }
490 skb->protocol = eth_type_trans(skb, netdev);
491
492 netdev->stats.rx_packets++;
493 netdev->stats.rx_bytes += skb->len;
494
495 /* push packet to protocol stack */
496 napi_gro_receive(&priv->napi, skb);
497
498 (*processed)++;
499 return true;
500 }
501
502 /******************************************************************************
503 * internal functions (transmit descriptor)
504 *****************************************************************************/
505 static void ftgmac100_txdes_reset(struct ftgmac100_txdes *txdes)
506 {
507 /* clear all except end of ring bit */
508 txdes->txdes0 &= cpu_to_le32(FTGMAC100_TXDES0_EDOTR);
509 txdes->txdes1 = 0;
510 txdes->txdes2 = 0;
511 txdes->txdes3 = 0;
512 }
513
514 static bool ftgmac100_txdes_owned_by_dma(struct ftgmac100_txdes *txdes)
515 {
516 return txdes->txdes0 & cpu_to_le32(FTGMAC100_TXDES0_TXDMA_OWN);
517 }
518
519 static void ftgmac100_txdes_set_dma_own(struct ftgmac100_txdes *txdes)
520 {
521 /*
522 * Make sure dma own bit will not be set before any other
523 * descriptor fields.
524 */
525 wmb();
526 txdes->txdes0 |= cpu_to_le32(FTGMAC100_TXDES0_TXDMA_OWN);
527 }
528
529 static void ftgmac100_txdes_set_end_of_ring(struct ftgmac100_txdes *txdes)
530 {
531 txdes->txdes0 |= cpu_to_le32(FTGMAC100_TXDES0_EDOTR);
532 }
533
534 static void ftgmac100_txdes_set_first_segment(struct ftgmac100_txdes *txdes)
535 {
536 txdes->txdes0 |= cpu_to_le32(FTGMAC100_TXDES0_FTS);
537 }
538
539 static void ftgmac100_txdes_set_last_segment(struct ftgmac100_txdes *txdes)
540 {
541 txdes->txdes0 |= cpu_to_le32(FTGMAC100_TXDES0_LTS);
542 }
543
544 static void ftgmac100_txdes_set_buffer_size(struct ftgmac100_txdes *txdes,
545 unsigned int len)
546 {
547 txdes->txdes0 |= cpu_to_le32(FTGMAC100_TXDES0_TXBUF_SIZE(len));
548 }
549
550 static void ftgmac100_txdes_set_txint(struct ftgmac100_txdes *txdes)
551 {
552 txdes->txdes1 |= cpu_to_le32(FTGMAC100_TXDES1_TXIC);
553 }
554
555 static void ftgmac100_txdes_set_tcpcs(struct ftgmac100_txdes *txdes)
556 {
557 txdes->txdes1 |= cpu_to_le32(FTGMAC100_TXDES1_TCP_CHKSUM);
558 }
559
560 static void ftgmac100_txdes_set_udpcs(struct ftgmac100_txdes *txdes)
561 {
562 txdes->txdes1 |= cpu_to_le32(FTGMAC100_TXDES1_UDP_CHKSUM);
563 }
564
565 static void ftgmac100_txdes_set_ipcs(struct ftgmac100_txdes *txdes)
566 {
567 txdes->txdes1 |= cpu_to_le32(FTGMAC100_TXDES1_IP_CHKSUM);
568 }
569
570 static void ftgmac100_txdes_set_dma_addr(struct ftgmac100_txdes *txdes,
571 dma_addr_t addr)
572 {
573 txdes->txdes3 = cpu_to_le32(addr);
574 }
575
576 static dma_addr_t ftgmac100_txdes_get_dma_addr(struct ftgmac100_txdes *txdes)
577 {
578 return le32_to_cpu(txdes->txdes3);
579 }
580
581 /*
582 * txdes2 is not used by hardware. We use it to keep track of socket buffer.
583 * Since hardware does not touch it, we can skip cpu_to_le32()/le32_to_cpu().
584 */
585 static void ftgmac100_txdes_set_skb(struct ftgmac100_txdes *txdes,
586 struct sk_buff *skb)
587 {
588 txdes->txdes2 = (unsigned int)skb;
589 }
590
591 static struct sk_buff *ftgmac100_txdes_get_skb(struct ftgmac100_txdes *txdes)
592 {
593 return (struct sk_buff *)txdes->txdes2;
594 }
595
596 /******************************************************************************
597 * internal functions (transmit)
598 *****************************************************************************/
599 static int ftgmac100_next_tx_pointer(int pointer)
600 {
601 return (pointer + 1) & (TX_QUEUE_ENTRIES - 1);
602 }
603
604 static void ftgmac100_tx_pointer_advance(struct ftgmac100 *priv)
605 {
606 priv->tx_pointer = ftgmac100_next_tx_pointer(priv->tx_pointer);
607 }
608
609 static void ftgmac100_tx_clean_pointer_advance(struct ftgmac100 *priv)
610 {
611 priv->tx_clean_pointer = ftgmac100_next_tx_pointer(priv->tx_clean_pointer);
612 }
613
614 static struct ftgmac100_txdes *ftgmac100_current_txdes(struct ftgmac100 *priv)
615 {
616 return &priv->descs->txdes[priv->tx_pointer];
617 }
618
619 static struct ftgmac100_txdes *
620 ftgmac100_current_clean_txdes(struct ftgmac100 *priv)
621 {
622 return &priv->descs->txdes[priv->tx_clean_pointer];
623 }
624
625 static bool ftgmac100_tx_complete_packet(struct ftgmac100 *priv)
626 {
627 struct net_device *netdev = priv->netdev;
628 struct ftgmac100_txdes *txdes;
629 struct sk_buff *skb;
630 dma_addr_t map;
631
632 if (priv->tx_pending == 0)
633 return false;
634
635 txdes = ftgmac100_current_clean_txdes(priv);
636
637 if (ftgmac100_txdes_owned_by_dma(txdes))
638 return false;
639
640 skb = ftgmac100_txdes_get_skb(txdes);
641 map = ftgmac100_txdes_get_dma_addr(txdes);
642
643 netdev->stats.tx_packets++;
644 netdev->stats.tx_bytes += skb->len;
645
646 dma_unmap_single(priv->dev, map, skb_headlen(skb), DMA_TO_DEVICE);
647
648 dev_kfree_skb(skb);
649
650 ftgmac100_txdes_reset(txdes);
651
652 ftgmac100_tx_clean_pointer_advance(priv);
653
654 spin_lock(&priv->tx_lock);
655 priv->tx_pending--;
656 spin_unlock(&priv->tx_lock);
657 netif_wake_queue(netdev);
658
659 return true;
660 }
661
662 static void ftgmac100_tx_complete(struct ftgmac100 *priv)
663 {
664 while (ftgmac100_tx_complete_packet(priv))
665 ;
666 }
667
668 static int ftgmac100_xmit(struct ftgmac100 *priv, struct sk_buff *skb,
669 dma_addr_t map)
670 {
671 struct net_device *netdev = priv->netdev;
672 struct ftgmac100_txdes *txdes;
673 unsigned int len = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len;
674
675 txdes = ftgmac100_current_txdes(priv);
676 ftgmac100_tx_pointer_advance(priv);
677
678 /* setup TX descriptor */
679 ftgmac100_txdes_set_skb(txdes, skb);
680 ftgmac100_txdes_set_dma_addr(txdes, map);
681 ftgmac100_txdes_set_buffer_size(txdes, len);
682
683 ftgmac100_txdes_set_first_segment(txdes);
684 ftgmac100_txdes_set_last_segment(txdes);
685 ftgmac100_txdes_set_txint(txdes);
686 if (skb->ip_summed == CHECKSUM_PARTIAL) {
687 __be16 protocol = skb->protocol;
688
689 if (protocol == cpu_to_be16(ETH_P_IP)) {
690 u8 ip_proto = ip_hdr(skb)->protocol;
691
692 ftgmac100_txdes_set_ipcs(txdes);
693 if (ip_proto == IPPROTO_TCP)
694 ftgmac100_txdes_set_tcpcs(txdes);
695 else if (ip_proto == IPPROTO_UDP)
696 ftgmac100_txdes_set_udpcs(txdes);
697 }
698 }
699
700 spin_lock(&priv->tx_lock);
701 priv->tx_pending++;
702 if (priv->tx_pending == TX_QUEUE_ENTRIES)
703 netif_stop_queue(netdev);
704
705 /* start transmit */
706 ftgmac100_txdes_set_dma_own(txdes);
707 spin_unlock(&priv->tx_lock);
708
709 ftgmac100_txdma_normal_prio_start_polling(priv);
710
711 return NETDEV_TX_OK;
712 }
713
714 /******************************************************************************
715 * internal functions (buffer)
716 *****************************************************************************/
717 static int ftgmac100_alloc_rx_page(struct ftgmac100 *priv,
718 struct ftgmac100_rxdes *rxdes, gfp_t gfp)
719 {
720 struct net_device *netdev = priv->netdev;
721 struct page *page;
722 dma_addr_t map;
723
724 page = alloc_page(gfp);
725 if (!page) {
726 if (net_ratelimit())
727 netdev_err(netdev, "failed to allocate rx page\n");
728 return -ENOMEM;
729 }
730
731 map = dma_map_page(priv->dev, page, 0, RX_BUF_SIZE, DMA_FROM_DEVICE);
732 if (unlikely(dma_mapping_error(priv->dev, map))) {
733 if (net_ratelimit())
734 netdev_err(netdev, "failed to map rx page\n");
735 __free_page(page);
736 return -ENOMEM;
737 }
738
739 ftgmac100_rxdes_set_page(rxdes, page);
740 ftgmac100_rxdes_set_dma_addr(rxdes, map);
741 ftgmac100_rxdes_set_dma_own(rxdes);
742 return 0;
743 }
744
745 static void ftgmac100_free_buffers(struct ftgmac100 *priv)
746 {
747 int i;
748
749 for (i = 0; i < RX_QUEUE_ENTRIES; i++) {
750 struct ftgmac100_rxdes *rxdes = &priv->descs->rxdes[i];
751 struct page *page = ftgmac100_rxdes_get_page(rxdes);
752 dma_addr_t map = ftgmac100_rxdes_get_dma_addr(rxdes);
753
754 if (!page)
755 continue;
756
757 dma_unmap_page(priv->dev, map, RX_BUF_SIZE, DMA_FROM_DEVICE);
758 __free_page(page);
759 }
760
761 for (i = 0; i < TX_QUEUE_ENTRIES; i++) {
762 struct ftgmac100_txdes *txdes = &priv->descs->txdes[i];
763 struct sk_buff *skb = ftgmac100_txdes_get_skb(txdes);
764 dma_addr_t map = ftgmac100_txdes_get_dma_addr(txdes);
765
766 if (!skb)
767 continue;
768
769 dma_unmap_single(priv->dev, map, skb_headlen(skb), DMA_TO_DEVICE);
770 dev_kfree_skb(skb);
771 }
772
773 dma_free_coherent(priv->dev, sizeof(struct ftgmac100_descs),
774 priv->descs, priv->descs_dma_addr);
775 }
776
777 static int ftgmac100_alloc_buffers(struct ftgmac100 *priv)
778 {
779 int i;
780
781 priv->descs = dma_alloc_coherent(priv->dev,
782 sizeof(struct ftgmac100_descs),
783 &priv->descs_dma_addr,
784 GFP_KERNEL | __GFP_ZERO);
785 if (!priv->descs)
786 return -ENOMEM;
787
788 /* initialize RX ring */
789 ftgmac100_rxdes_set_end_of_ring(&priv->descs->rxdes[RX_QUEUE_ENTRIES - 1]);
790
791 for (i = 0; i < RX_QUEUE_ENTRIES; i++) {
792 struct ftgmac100_rxdes *rxdes = &priv->descs->rxdes[i];
793
794 if (ftgmac100_alloc_rx_page(priv, rxdes, GFP_KERNEL))
795 goto err;
796 }
797
798 /* initialize TX ring */
799 ftgmac100_txdes_set_end_of_ring(&priv->descs->txdes[TX_QUEUE_ENTRIES - 1]);
800 return 0;
801
802 err:
803 ftgmac100_free_buffers(priv);
804 return -ENOMEM;
805 }
806
807 /******************************************************************************
808 * internal functions (mdio)
809 *****************************************************************************/
810 static void ftgmac100_adjust_link(struct net_device *netdev)
811 {
812 struct ftgmac100 *priv = netdev_priv(netdev);
813 struct phy_device *phydev = priv->phydev;
814 int ier;
815
816 if (phydev->speed == priv->old_speed)
817 return;
818
819 priv->old_speed = phydev->speed;
820
821 ier = ioread32(priv->base + FTGMAC100_OFFSET_IER);
822
823 /* disable all interrupts */
824 iowrite32(0, priv->base + FTGMAC100_OFFSET_IER);
825
826 netif_stop_queue(netdev);
827 ftgmac100_stop_hw(priv);
828
829 netif_start_queue(netdev);
830 ftgmac100_init_hw(priv);
831 ftgmac100_start_hw(priv, phydev->speed);
832
833 /* re-enable interrupts */
834 iowrite32(ier, priv->base + FTGMAC100_OFFSET_IER);
835 }
836
837 static int ftgmac100_mii_probe(struct ftgmac100 *priv)
838 {
839 struct net_device *netdev = priv->netdev;
840 struct phy_device *phydev = NULL;
841 int i;
842
843 /* search for connect PHY device */
844 for (i = 0; i < PHY_MAX_ADDR; i++) {
845 struct phy_device *tmp = priv->mii_bus->phy_map[i];
846
847 if (tmp) {
848 phydev = tmp;
849 break;
850 }
851 }
852
853 /* now we are supposed to have a proper phydev, to attach to... */
854 if (!phydev) {
855 netdev_info(netdev, "%s: no PHY found\n", netdev->name);
856 return -ENODEV;
857 }
858
859 phydev = phy_connect(netdev, dev_name(&phydev->dev),
860 &ftgmac100_adjust_link, PHY_INTERFACE_MODE_GMII);
861
862 if (IS_ERR(phydev)) {
863 netdev_err(netdev, "%s: Could not attach to PHY\n", netdev->name);
864 return PTR_ERR(phydev);
865 }
866
867 priv->phydev = phydev;
868 return 0;
869 }
870
871 /******************************************************************************
872 * struct mii_bus functions
873 *****************************************************************************/
874 static int ftgmac100_mdiobus_read(struct mii_bus *bus, int phy_addr, int regnum)
875 {
876 struct net_device *netdev = bus->priv;
877 struct ftgmac100 *priv = netdev_priv(netdev);
878 unsigned int phycr;
879 int i;
880
881 phycr = ioread32(priv->base + FTGMAC100_OFFSET_PHYCR);
882
883 /* preserve MDC cycle threshold */
884 phycr &= FTGMAC100_PHYCR_MDC_CYCTHR_MASK;
885
886 phycr |= FTGMAC100_PHYCR_PHYAD(phy_addr) |
887 FTGMAC100_PHYCR_REGAD(regnum) |
888 FTGMAC100_PHYCR_MIIRD;
889
890 iowrite32(phycr, priv->base + FTGMAC100_OFFSET_PHYCR);
891
892 for (i = 0; i < 10; i++) {
893 phycr = ioread32(priv->base + FTGMAC100_OFFSET_PHYCR);
894
895 if ((phycr & FTGMAC100_PHYCR_MIIRD) == 0) {
896 int data;
897
898 data = ioread32(priv->base + FTGMAC100_OFFSET_PHYDATA);
899 return FTGMAC100_PHYDATA_MIIRDATA(data);
900 }
901
902 udelay(100);
903 }
904
905 netdev_err(netdev, "mdio read timed out\n");
906 return -EIO;
907 }
908
909 static int ftgmac100_mdiobus_write(struct mii_bus *bus, int phy_addr,
910 int regnum, u16 value)
911 {
912 struct net_device *netdev = bus->priv;
913 struct ftgmac100 *priv = netdev_priv(netdev);
914 unsigned int phycr;
915 int data;
916 int i;
917
918 phycr = ioread32(priv->base + FTGMAC100_OFFSET_PHYCR);
919
920 /* preserve MDC cycle threshold */
921 phycr &= FTGMAC100_PHYCR_MDC_CYCTHR_MASK;
922
923 phycr |= FTGMAC100_PHYCR_PHYAD(phy_addr) |
924 FTGMAC100_PHYCR_REGAD(regnum) |
925 FTGMAC100_PHYCR_MIIWR;
926
927 data = FTGMAC100_PHYDATA_MIIWDATA(value);
928
929 iowrite32(data, priv->base + FTGMAC100_OFFSET_PHYDATA);
930 iowrite32(phycr, priv->base + FTGMAC100_OFFSET_PHYCR);
931
932 for (i = 0; i < 10; i++) {
933 phycr = ioread32(priv->base + FTGMAC100_OFFSET_PHYCR);
934
935 if ((phycr & FTGMAC100_PHYCR_MIIWR) == 0)
936 return 0;
937
938 udelay(100);
939 }
940
941 netdev_err(netdev, "mdio write timed out\n");
942 return -EIO;
943 }
944
945 static int ftgmac100_mdiobus_reset(struct mii_bus *bus)
946 {
947 return 0;
948 }
949
950 /******************************************************************************
951 * struct ethtool_ops functions
952 *****************************************************************************/
953 static void ftgmac100_get_drvinfo(struct net_device *netdev,
954 struct ethtool_drvinfo *info)
955 {
956 strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
957 strlcpy(info->version, DRV_VERSION, sizeof(info->version));
958 strlcpy(info->bus_info, dev_name(&netdev->dev), sizeof(info->bus_info));
959 }
960
961 static int ftgmac100_get_settings(struct net_device *netdev,
962 struct ethtool_cmd *cmd)
963 {
964 struct ftgmac100 *priv = netdev_priv(netdev);
965
966 return phy_ethtool_gset(priv->phydev, cmd);
967 }
968
969 static int ftgmac100_set_settings(struct net_device *netdev,
970 struct ethtool_cmd *cmd)
971 {
972 struct ftgmac100 *priv = netdev_priv(netdev);
973
974 return phy_ethtool_sset(priv->phydev, cmd);
975 }
976
977 static const struct ethtool_ops ftgmac100_ethtool_ops = {
978 .set_settings = ftgmac100_set_settings,
979 .get_settings = ftgmac100_get_settings,
980 .get_drvinfo = ftgmac100_get_drvinfo,
981 .get_link = ethtool_op_get_link,
982 };
983
984 /******************************************************************************
985 * interrupt handler
986 *****************************************************************************/
987 static irqreturn_t ftgmac100_interrupt(int irq, void *dev_id)
988 {
989 struct net_device *netdev = dev_id;
990 struct ftgmac100 *priv = netdev_priv(netdev);
991
992 if (likely(netif_running(netdev))) {
993 /* Disable interrupts for polling */
994 iowrite32(0, priv->base + FTGMAC100_OFFSET_IER);
995 napi_schedule(&priv->napi);
996 }
997
998 return IRQ_HANDLED;
999 }
1000
1001 /******************************************************************************
1002 * struct napi_struct functions
1003 *****************************************************************************/
1004 static int ftgmac100_poll(struct napi_struct *napi, int budget)
1005 {
1006 struct ftgmac100 *priv = container_of(napi, struct ftgmac100, napi);
1007 struct net_device *netdev = priv->netdev;
1008 unsigned int status;
1009 bool completed = true;
1010 int rx = 0;
1011
1012 status = ioread32(priv->base + FTGMAC100_OFFSET_ISR);
1013 iowrite32(status, priv->base + FTGMAC100_OFFSET_ISR);
1014
1015 if (status & (FTGMAC100_INT_RPKT_BUF | FTGMAC100_INT_NO_RXBUF)) {
1016 /*
1017 * FTGMAC100_INT_RPKT_BUF:
1018 * RX DMA has received packets into RX buffer successfully
1019 *
1020 * FTGMAC100_INT_NO_RXBUF:
1021 * RX buffer unavailable
1022 */
1023 bool retry;
1024
1025 do {
1026 retry = ftgmac100_rx_packet(priv, &rx);
1027 } while (retry && rx < budget);
1028
1029 if (retry && rx == budget)
1030 completed = false;
1031 }
1032
1033 if (status & (FTGMAC100_INT_XPKT_ETH | FTGMAC100_INT_XPKT_LOST)) {
1034 /*
1035 * FTGMAC100_INT_XPKT_ETH:
1036 * packet transmitted to ethernet successfully
1037 *
1038 * FTGMAC100_INT_XPKT_LOST:
1039 * packet transmitted to ethernet lost due to late
1040 * collision or excessive collision
1041 */
1042 ftgmac100_tx_complete(priv);
1043 }
1044
1045 if (status & (FTGMAC100_INT_NO_RXBUF | FTGMAC100_INT_RPKT_LOST |
1046 FTGMAC100_INT_AHB_ERR | FTGMAC100_INT_PHYSTS_CHG)) {
1047 if (net_ratelimit())
1048 netdev_info(netdev, "[ISR] = 0x%x: %s%s%s%s\n", status,
1049 status & FTGMAC100_INT_NO_RXBUF ? "NO_RXBUF " : "",
1050 status & FTGMAC100_INT_RPKT_LOST ? "RPKT_LOST " : "",
1051 status & FTGMAC100_INT_AHB_ERR ? "AHB_ERR " : "",
1052 status & FTGMAC100_INT_PHYSTS_CHG ? "PHYSTS_CHG" : "");
1053
1054 if (status & FTGMAC100_INT_NO_RXBUF) {
1055 /* RX buffer unavailable */
1056 netdev->stats.rx_over_errors++;
1057 }
1058
1059 if (status & FTGMAC100_INT_RPKT_LOST) {
1060 /* received packet lost due to RX FIFO full */
1061 netdev->stats.rx_fifo_errors++;
1062 }
1063 }
1064
1065 if (completed) {
1066 napi_complete(napi);
1067
1068 /* enable all interrupts */
1069 iowrite32(INT_MASK_ALL_ENABLED, priv->base + FTGMAC100_OFFSET_IER);
1070 }
1071
1072 return rx;
1073 }
1074
1075 /******************************************************************************
1076 * struct net_device_ops functions
1077 *****************************************************************************/
1078 static int ftgmac100_open(struct net_device *netdev)
1079 {
1080 struct ftgmac100 *priv = netdev_priv(netdev);
1081 int err;
1082
1083 err = ftgmac100_alloc_buffers(priv);
1084 if (err) {
1085 netdev_err(netdev, "failed to allocate buffers\n");
1086 goto err_alloc;
1087 }
1088
1089 err = request_irq(priv->irq, ftgmac100_interrupt, 0, netdev->name, netdev);
1090 if (err) {
1091 netdev_err(netdev, "failed to request irq %d\n", priv->irq);
1092 goto err_irq;
1093 }
1094
1095 priv->rx_pointer = 0;
1096 priv->tx_clean_pointer = 0;
1097 priv->tx_pointer = 0;
1098 priv->tx_pending = 0;
1099
1100 err = ftgmac100_reset_hw(priv);
1101 if (err)
1102 goto err_hw;
1103
1104 ftgmac100_init_hw(priv);
1105 ftgmac100_start_hw(priv, 10);
1106
1107 phy_start(priv->phydev);
1108
1109 napi_enable(&priv->napi);
1110 netif_start_queue(netdev);
1111
1112 /* enable all interrupts */
1113 iowrite32(INT_MASK_ALL_ENABLED, priv->base + FTGMAC100_OFFSET_IER);
1114 return 0;
1115
1116 err_hw:
1117 free_irq(priv->irq, netdev);
1118 err_irq:
1119 ftgmac100_free_buffers(priv);
1120 err_alloc:
1121 return err;
1122 }
1123
1124 static int ftgmac100_stop(struct net_device *netdev)
1125 {
1126 struct ftgmac100 *priv = netdev_priv(netdev);
1127
1128 /* disable all interrupts */
1129 iowrite32(0, priv->base + FTGMAC100_OFFSET_IER);
1130
1131 netif_stop_queue(netdev);
1132 napi_disable(&priv->napi);
1133 phy_stop(priv->phydev);
1134
1135 ftgmac100_stop_hw(priv);
1136 free_irq(priv->irq, netdev);
1137 ftgmac100_free_buffers(priv);
1138
1139 return 0;
1140 }
1141
1142 static int ftgmac100_hard_start_xmit(struct sk_buff *skb,
1143 struct net_device *netdev)
1144 {
1145 struct ftgmac100 *priv = netdev_priv(netdev);
1146 dma_addr_t map;
1147
1148 if (unlikely(skb->len > MAX_PKT_SIZE)) {
1149 if (net_ratelimit())
1150 netdev_dbg(netdev, "tx packet too big\n");
1151
1152 netdev->stats.tx_dropped++;
1153 dev_kfree_skb(skb);
1154 return NETDEV_TX_OK;
1155 }
1156
1157 map = dma_map_single(priv->dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE);
1158 if (unlikely(dma_mapping_error(priv->dev, map))) {
1159 /* drop packet */
1160 if (net_ratelimit())
1161 netdev_err(netdev, "map socket buffer failed\n");
1162
1163 netdev->stats.tx_dropped++;
1164 dev_kfree_skb(skb);
1165 return NETDEV_TX_OK;
1166 }
1167
1168 return ftgmac100_xmit(priv, skb, map);
1169 }
1170
1171 /* optional */
1172 static int ftgmac100_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1173 {
1174 struct ftgmac100 *priv = netdev_priv(netdev);
1175
1176 return phy_mii_ioctl(priv->phydev, ifr, cmd);
1177 }
1178
1179 static const struct net_device_ops ftgmac100_netdev_ops = {
1180 .ndo_open = ftgmac100_open,
1181 .ndo_stop = ftgmac100_stop,
1182 .ndo_start_xmit = ftgmac100_hard_start_xmit,
1183 .ndo_set_mac_address = eth_mac_addr,
1184 .ndo_validate_addr = eth_validate_addr,
1185 .ndo_do_ioctl = ftgmac100_do_ioctl,
1186 };
1187
1188 /******************************************************************************
1189 * struct platform_driver functions
1190 *****************************************************************************/
1191 static int ftgmac100_probe(struct platform_device *pdev)
1192 {
1193 struct resource *res;
1194 int irq;
1195 struct net_device *netdev;
1196 struct ftgmac100 *priv;
1197 int err;
1198 int i;
1199
1200 if (!pdev)
1201 return -ENODEV;
1202
1203 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1204 if (!res)
1205 return -ENXIO;
1206
1207 irq = platform_get_irq(pdev, 0);
1208 if (irq < 0)
1209 return irq;
1210
1211 /* setup net_device */
1212 netdev = alloc_etherdev(sizeof(*priv));
1213 if (!netdev) {
1214 err = -ENOMEM;
1215 goto err_alloc_etherdev;
1216 }
1217
1218 SET_NETDEV_DEV(netdev, &pdev->dev);
1219
1220 SET_ETHTOOL_OPS(netdev, &ftgmac100_ethtool_ops);
1221 netdev->netdev_ops = &ftgmac100_netdev_ops;
1222 netdev->features = NETIF_F_IP_CSUM | NETIF_F_GRO;
1223
1224 platform_set_drvdata(pdev, netdev);
1225
1226 /* setup private data */
1227 priv = netdev_priv(netdev);
1228 priv->netdev = netdev;
1229 priv->dev = &pdev->dev;
1230
1231 spin_lock_init(&priv->tx_lock);
1232
1233 /* initialize NAPI */
1234 netif_napi_add(netdev, &priv->napi, ftgmac100_poll, 64);
1235
1236 /* map io memory */
1237 priv->res = request_mem_region(res->start, resource_size(res),
1238 dev_name(&pdev->dev));
1239 if (!priv->res) {
1240 dev_err(&pdev->dev, "Could not reserve memory region\n");
1241 err = -ENOMEM;
1242 goto err_req_mem;
1243 }
1244
1245 priv->base = ioremap(res->start, resource_size(res));
1246 if (!priv->base) {
1247 dev_err(&pdev->dev, "Failed to ioremap ethernet registers\n");
1248 err = -EIO;
1249 goto err_ioremap;
1250 }
1251
1252 priv->irq = irq;
1253
1254 /* initialize mdio bus */
1255 priv->mii_bus = mdiobus_alloc();
1256 if (!priv->mii_bus) {
1257 err = -EIO;
1258 goto err_alloc_mdiobus;
1259 }
1260
1261 priv->mii_bus->name = "ftgmac100_mdio";
1262 snprintf(priv->mii_bus->id, MII_BUS_ID_SIZE, "ftgmac100_mii");
1263
1264 priv->mii_bus->priv = netdev;
1265 priv->mii_bus->read = ftgmac100_mdiobus_read;
1266 priv->mii_bus->write = ftgmac100_mdiobus_write;
1267 priv->mii_bus->reset = ftgmac100_mdiobus_reset;
1268 priv->mii_bus->irq = priv->phy_irq;
1269
1270 for (i = 0; i < PHY_MAX_ADDR; i++)
1271 priv->mii_bus->irq[i] = PHY_POLL;
1272
1273 err = mdiobus_register(priv->mii_bus);
1274 if (err) {
1275 dev_err(&pdev->dev, "Cannot register MDIO bus!\n");
1276 goto err_register_mdiobus;
1277 }
1278
1279 err = ftgmac100_mii_probe(priv);
1280 if (err) {
1281 dev_err(&pdev->dev, "MII Probe failed!\n");
1282 goto err_mii_probe;
1283 }
1284
1285 /* register network device */
1286 err = register_netdev(netdev);
1287 if (err) {
1288 dev_err(&pdev->dev, "Failed to register netdev\n");
1289 goto err_register_netdev;
1290 }
1291
1292 netdev_info(netdev, "irq %d, mapped at %p\n", priv->irq, priv->base);
1293
1294 if (!is_valid_ether_addr(netdev->dev_addr)) {
1295 eth_hw_addr_random(netdev);
1296 netdev_info(netdev, "generated random MAC address %pM\n",
1297 netdev->dev_addr);
1298 }
1299
1300 return 0;
1301
1302 err_register_netdev:
1303 phy_disconnect(priv->phydev);
1304 err_mii_probe:
1305 mdiobus_unregister(priv->mii_bus);
1306 err_register_mdiobus:
1307 mdiobus_free(priv->mii_bus);
1308 err_alloc_mdiobus:
1309 iounmap(priv->base);
1310 err_ioremap:
1311 release_resource(priv->res);
1312 err_req_mem:
1313 netif_napi_del(&priv->napi);
1314 free_netdev(netdev);
1315 err_alloc_etherdev:
1316 return err;
1317 }
1318
1319 static int __exit ftgmac100_remove(struct platform_device *pdev)
1320 {
1321 struct net_device *netdev;
1322 struct ftgmac100 *priv;
1323
1324 netdev = platform_get_drvdata(pdev);
1325 priv = netdev_priv(netdev);
1326
1327 unregister_netdev(netdev);
1328
1329 phy_disconnect(priv->phydev);
1330 mdiobus_unregister(priv->mii_bus);
1331 mdiobus_free(priv->mii_bus);
1332
1333 iounmap(priv->base);
1334 release_resource(priv->res);
1335
1336 netif_napi_del(&priv->napi);
1337 free_netdev(netdev);
1338 return 0;
1339 }
1340
1341 static struct platform_driver ftgmac100_driver = {
1342 .probe = ftgmac100_probe,
1343 .remove = __exit_p(ftgmac100_remove),
1344 .driver = {
1345 .name = DRV_NAME,
1346 .owner = THIS_MODULE,
1347 },
1348 };
1349
1350 module_platform_driver(ftgmac100_driver);
1351
1352 MODULE_AUTHOR("Po-Yu Chuang <ratbert@faraday-tech.com>");
1353 MODULE_DESCRIPTION("FTGMAC100 driver");
1354 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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