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x86/xen: resume timer irqs early
[linux/fpc-iii.git] / drivers / net / ethernet / faraday / ftgmac100.c
blob212f44b3a773d2bc072cbb9d6411df45f55e0fe8
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_zalloc_coherent(priv->dev,
782 sizeof(struct ftgmac100_descs),
783 &priv->descs_dma_addr, GFP_KERNEL);
784 if (!priv->descs)
785 return -ENOMEM;
786
787 /* initialize RX ring */
788 ftgmac100_rxdes_set_end_of_ring(&priv->descs->rxdes[RX_QUEUE_ENTRIES - 1]);
789
790 for (i = 0; i < RX_QUEUE_ENTRIES; i++) {
791 struct ftgmac100_rxdes *rxdes = &priv->descs->rxdes[i];
792
793 if (ftgmac100_alloc_rx_page(priv, rxdes, GFP_KERNEL))
794 goto err;
795 }
796
797 /* initialize TX ring */
798 ftgmac100_txdes_set_end_of_ring(&priv->descs->txdes[TX_QUEUE_ENTRIES - 1]);
799 return 0;
800
801 err:
802 ftgmac100_free_buffers(priv);
803 return -ENOMEM;
804 }
805
806 /******************************************************************************
807 * internal functions (mdio)
808 *****************************************************************************/
809 static void ftgmac100_adjust_link(struct net_device *netdev)
810 {
811 struct ftgmac100 *priv = netdev_priv(netdev);
812 struct phy_device *phydev = priv->phydev;
813 int ier;
814
815 if (phydev->speed == priv->old_speed)
816 return;
817
818 priv->old_speed = phydev->speed;
819
820 ier = ioread32(priv->base + FTGMAC100_OFFSET_IER);
821
822 /* disable all interrupts */
823 iowrite32(0, priv->base + FTGMAC100_OFFSET_IER);
824
825 netif_stop_queue(netdev);
826 ftgmac100_stop_hw(priv);
827
828 netif_start_queue(netdev);
829 ftgmac100_init_hw(priv);
830 ftgmac100_start_hw(priv, phydev->speed);
831
832 /* re-enable interrupts */
833 iowrite32(ier, priv->base + FTGMAC100_OFFSET_IER);
834 }
835
836 static int ftgmac100_mii_probe(struct ftgmac100 *priv)
837 {
838 struct net_device *netdev = priv->netdev;
839 struct phy_device *phydev = NULL;
840 int i;
841
842 /* search for connect PHY device */
843 for (i = 0; i < PHY_MAX_ADDR; i++) {
844 struct phy_device *tmp = priv->mii_bus->phy_map[i];
845
846 if (tmp) {
847 phydev = tmp;
848 break;
849 }
850 }
851
852 /* now we are supposed to have a proper phydev, to attach to... */
853 if (!phydev) {
854 netdev_info(netdev, "%s: no PHY found\n", netdev->name);
855 return -ENODEV;
856 }
857
858 phydev = phy_connect(netdev, dev_name(&phydev->dev),
859 &ftgmac100_adjust_link, PHY_INTERFACE_MODE_GMII);
860
861 if (IS_ERR(phydev)) {
862 netdev_err(netdev, "%s: Could not attach to PHY\n", netdev->name);
863 return PTR_ERR(phydev);
864 }
865
866 priv->phydev = phydev;
867 return 0;
868 }
869
870 /******************************************************************************
871 * struct mii_bus functions
872 *****************************************************************************/
873 static int ftgmac100_mdiobus_read(struct mii_bus *bus, int phy_addr, int regnum)
874 {
875 struct net_device *netdev = bus->priv;
876 struct ftgmac100 *priv = netdev_priv(netdev);
877 unsigned int phycr;
878 int i;
879
880 phycr = ioread32(priv->base + FTGMAC100_OFFSET_PHYCR);
881
882 /* preserve MDC cycle threshold */
883 phycr &= FTGMAC100_PHYCR_MDC_CYCTHR_MASK;
884
885 phycr |= FTGMAC100_PHYCR_PHYAD(phy_addr) |
886 FTGMAC100_PHYCR_REGAD(regnum) |
887 FTGMAC100_PHYCR_MIIRD;
888
889 iowrite32(phycr, priv->base + FTGMAC100_OFFSET_PHYCR);
890
891 for (i = 0; i < 10; i++) {
892 phycr = ioread32(priv->base + FTGMAC100_OFFSET_PHYCR);
893
894 if ((phycr & FTGMAC100_PHYCR_MIIRD) == 0) {
895 int data;
896
897 data = ioread32(priv->base + FTGMAC100_OFFSET_PHYDATA);
898 return FTGMAC100_PHYDATA_MIIRDATA(data);
899 }
900
901 udelay(100);
902 }
903
904 netdev_err(netdev, "mdio read timed out\n");
905 return -EIO;
906 }
907
908 static int ftgmac100_mdiobus_write(struct mii_bus *bus, int phy_addr,
909 int regnum, u16 value)
910 {
911 struct net_device *netdev = bus->priv;
912 struct ftgmac100 *priv = netdev_priv(netdev);
913 unsigned int phycr;
914 int data;
915 int i;
916
917 phycr = ioread32(priv->base + FTGMAC100_OFFSET_PHYCR);
918
919 /* preserve MDC cycle threshold */
920 phycr &= FTGMAC100_PHYCR_MDC_CYCTHR_MASK;
921
922 phycr |= FTGMAC100_PHYCR_PHYAD(phy_addr) |
923 FTGMAC100_PHYCR_REGAD(regnum) |
924 FTGMAC100_PHYCR_MIIWR;
925
926 data = FTGMAC100_PHYDATA_MIIWDATA(value);
927
928 iowrite32(data, priv->base + FTGMAC100_OFFSET_PHYDATA);
929 iowrite32(phycr, priv->base + FTGMAC100_OFFSET_PHYCR);
930
931 for (i = 0; i < 10; i++) {
932 phycr = ioread32(priv->base + FTGMAC100_OFFSET_PHYCR);
933
934 if ((phycr & FTGMAC100_PHYCR_MIIWR) == 0)
935 return 0;
936
937 udelay(100);
938 }
939
940 netdev_err(netdev, "mdio write timed out\n");
941 return -EIO;
942 }
943
944 static int ftgmac100_mdiobus_reset(struct mii_bus *bus)
945 {
946 return 0;
947 }
948
949 /******************************************************************************
950 * struct ethtool_ops functions
951 *****************************************************************************/
952 static void ftgmac100_get_drvinfo(struct net_device *netdev,
953 struct ethtool_drvinfo *info)
954 {
955 strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
956 strlcpy(info->version, DRV_VERSION, sizeof(info->version));
957 strlcpy(info->bus_info, dev_name(&netdev->dev), sizeof(info->bus_info));
958 }
959
960 static int ftgmac100_get_settings(struct net_device *netdev,
961 struct ethtool_cmd *cmd)
962 {
963 struct ftgmac100 *priv = netdev_priv(netdev);
964
965 return phy_ethtool_gset(priv->phydev, cmd);
966 }
967
968 static int ftgmac100_set_settings(struct net_device *netdev,
969 struct ethtool_cmd *cmd)
970 {
971 struct ftgmac100 *priv = netdev_priv(netdev);
972
973 return phy_ethtool_sset(priv->phydev, cmd);
974 }
975
976 static const struct ethtool_ops ftgmac100_ethtool_ops = {
977 .set_settings = ftgmac100_set_settings,
978 .get_settings = ftgmac100_get_settings,
979 .get_drvinfo = ftgmac100_get_drvinfo,
980 .get_link = ethtool_op_get_link,
981 };
982
983 /******************************************************************************
984 * interrupt handler
985 *****************************************************************************/
986 static irqreturn_t ftgmac100_interrupt(int irq, void *dev_id)
987 {
988 struct net_device *netdev = dev_id;
989 struct ftgmac100 *priv = netdev_priv(netdev);
990
991 if (likely(netif_running(netdev))) {
992 /* Disable interrupts for polling */
993 iowrite32(0, priv->base + FTGMAC100_OFFSET_IER);
994 napi_schedule(&priv->napi);
995 }
996
997 return IRQ_HANDLED;
998 }
999
1000 /******************************************************************************
1001 * struct napi_struct functions
1002 *****************************************************************************/
1003 static int ftgmac100_poll(struct napi_struct *napi, int budget)
1004 {
1005 struct ftgmac100 *priv = container_of(napi, struct ftgmac100, napi);
1006 struct net_device *netdev = priv->netdev;
1007 unsigned int status;
1008 bool completed = true;
1009 int rx = 0;
1010
1011 status = ioread32(priv->base + FTGMAC100_OFFSET_ISR);
1012 iowrite32(status, priv->base + FTGMAC100_OFFSET_ISR);
1013
1014 if (status & (FTGMAC100_INT_RPKT_BUF | FTGMAC100_INT_NO_RXBUF)) {
1015 /*
1016 * FTGMAC100_INT_RPKT_BUF:
1017 * RX DMA has received packets into RX buffer successfully
1018 *
1019 * FTGMAC100_INT_NO_RXBUF:
1020 * RX buffer unavailable
1021 */
1022 bool retry;
1023
1024 do {
1025 retry = ftgmac100_rx_packet(priv, &rx);
1026 } while (retry && rx < budget);
1027
1028 if (retry && rx == budget)
1029 completed = false;
1030 }
1031
1032 if (status & (FTGMAC100_INT_XPKT_ETH | FTGMAC100_INT_XPKT_LOST)) {
1033 /*
1034 * FTGMAC100_INT_XPKT_ETH:
1035 * packet transmitted to ethernet successfully
1036 *
1037 * FTGMAC100_INT_XPKT_LOST:
1038 * packet transmitted to ethernet lost due to late
1039 * collision or excessive collision
1040 */
1041 ftgmac100_tx_complete(priv);
1042 }
1043
1044 if (status & (FTGMAC100_INT_NO_RXBUF | FTGMAC100_INT_RPKT_LOST |
1045 FTGMAC100_INT_AHB_ERR | FTGMAC100_INT_PHYSTS_CHG)) {
1046 if (net_ratelimit())
1047 netdev_info(netdev, "[ISR] = 0x%x: %s%s%s%s\n", status,
1048 status & FTGMAC100_INT_NO_RXBUF ? "NO_RXBUF " : "",
1049 status & FTGMAC100_INT_RPKT_LOST ? "RPKT_LOST " : "",
1050 status & FTGMAC100_INT_AHB_ERR ? "AHB_ERR " : "",
1051 status & FTGMAC100_INT_PHYSTS_CHG ? "PHYSTS_CHG" : "");
1052
1053 if (status & FTGMAC100_INT_NO_RXBUF) {
1054 /* RX buffer unavailable */
1055 netdev->stats.rx_over_errors++;
1056 }
1057
1058 if (status & FTGMAC100_INT_RPKT_LOST) {
1059 /* received packet lost due to RX FIFO full */
1060 netdev->stats.rx_fifo_errors++;
1061 }
1062 }
1063
1064 if (completed) {
1065 napi_complete(napi);
1066
1067 /* enable all interrupts */
1068 iowrite32(INT_MASK_ALL_ENABLED, priv->base + FTGMAC100_OFFSET_IER);
1069 }
1070
1071 return rx;
1072 }
1073
1074 /******************************************************************************
1075 * struct net_device_ops functions
1076 *****************************************************************************/
1077 static int ftgmac100_open(struct net_device *netdev)
1078 {
1079 struct ftgmac100 *priv = netdev_priv(netdev);
1080 int err;
1081
1082 err = ftgmac100_alloc_buffers(priv);
1083 if (err) {
1084 netdev_err(netdev, "failed to allocate buffers\n");
1085 goto err_alloc;
1086 }
1087
1088 err = request_irq(priv->irq, ftgmac100_interrupt, 0, netdev->name, netdev);
1089 if (err) {
1090 netdev_err(netdev, "failed to request irq %d\n", priv->irq);
1091 goto err_irq;
1092 }
1093
1094 priv->rx_pointer = 0;
1095 priv->tx_clean_pointer = 0;
1096 priv->tx_pointer = 0;
1097 priv->tx_pending = 0;
1098
1099 err = ftgmac100_reset_hw(priv);
1100 if (err)
1101 goto err_hw;
1102
1103 ftgmac100_init_hw(priv);
1104 ftgmac100_start_hw(priv, 10);
1105
1106 phy_start(priv->phydev);
1107
1108 napi_enable(&priv->napi);
1109 netif_start_queue(netdev);
1110
1111 /* enable all interrupts */
1112 iowrite32(INT_MASK_ALL_ENABLED, priv->base + FTGMAC100_OFFSET_IER);
1113 return 0;
1114
1115 err_hw:
1116 free_irq(priv->irq, netdev);
1117 err_irq:
1118 ftgmac100_free_buffers(priv);
1119 err_alloc:
1120 return err;
1121 }
1122
1123 static int ftgmac100_stop(struct net_device *netdev)
1124 {
1125 struct ftgmac100 *priv = netdev_priv(netdev);
1126
1127 /* disable all interrupts */
1128 iowrite32(0, priv->base + FTGMAC100_OFFSET_IER);
1129
1130 netif_stop_queue(netdev);
1131 napi_disable(&priv->napi);
1132 phy_stop(priv->phydev);
1133
1134 ftgmac100_stop_hw(priv);
1135 free_irq(priv->irq, netdev);
1136 ftgmac100_free_buffers(priv);
1137
1138 return 0;
1139 }
1140
1141 static int ftgmac100_hard_start_xmit(struct sk_buff *skb,
1142 struct net_device *netdev)
1143 {
1144 struct ftgmac100 *priv = netdev_priv(netdev);
1145 dma_addr_t map;
1146
1147 if (unlikely(skb->len > MAX_PKT_SIZE)) {
1148 if (net_ratelimit())
1149 netdev_dbg(netdev, "tx packet too big\n");
1150
1151 netdev->stats.tx_dropped++;
1152 dev_kfree_skb(skb);
1153 return NETDEV_TX_OK;
1154 }
1155
1156 map = dma_map_single(priv->dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE);
1157 if (unlikely(dma_mapping_error(priv->dev, map))) {
1158 /* drop packet */
1159 if (net_ratelimit())
1160 netdev_err(netdev, "map socket buffer failed\n");
1161
1162 netdev->stats.tx_dropped++;
1163 dev_kfree_skb(skb);
1164 return NETDEV_TX_OK;
1165 }
1166
1167 return ftgmac100_xmit(priv, skb, map);
1168 }
1169
1170 /* optional */
1171 static int ftgmac100_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1172 {
1173 struct ftgmac100 *priv = netdev_priv(netdev);
1174
1175 return phy_mii_ioctl(priv->phydev, ifr, cmd);
1176 }
1177
1178 static const struct net_device_ops ftgmac100_netdev_ops = {
1179 .ndo_open = ftgmac100_open,
1180 .ndo_stop = ftgmac100_stop,
1181 .ndo_start_xmit = ftgmac100_hard_start_xmit,
1182 .ndo_set_mac_address = eth_mac_addr,
1183 .ndo_validate_addr = eth_validate_addr,
1184 .ndo_do_ioctl = ftgmac100_do_ioctl,
1185 };
1186
1187 /******************************************************************************
1188 * struct platform_driver functions
1189 *****************************************************************************/
1190 static int ftgmac100_probe(struct platform_device *pdev)
1191 {
1192 struct resource *res;
1193 int irq;
1194 struct net_device *netdev;
1195 struct ftgmac100 *priv;
1196 int err;
1197 int i;
1198
1199 if (!pdev)
1200 return -ENODEV;
1201
1202 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1203 if (!res)
1204 return -ENXIO;
1205
1206 irq = platform_get_irq(pdev, 0);
1207 if (irq < 0)
1208 return irq;
1209
1210 /* setup net_device */
1211 netdev = alloc_etherdev(sizeof(*priv));
1212 if (!netdev) {
1213 err = -ENOMEM;
1214 goto err_alloc_etherdev;
1215 }
1216
1217 SET_NETDEV_DEV(netdev, &pdev->dev);
1218
1219 SET_ETHTOOL_OPS(netdev, &ftgmac100_ethtool_ops);
1220 netdev->netdev_ops = &ftgmac100_netdev_ops;
1221 netdev->features = NETIF_F_IP_CSUM | NETIF_F_GRO;
1222
1223 platform_set_drvdata(pdev, netdev);
1224
1225 /* setup private data */
1226 priv = netdev_priv(netdev);
1227 priv->netdev = netdev;
1228 priv->dev = &pdev->dev;
1229
1230 spin_lock_init(&priv->tx_lock);
1231
1232 /* initialize NAPI */
1233 netif_napi_add(netdev, &priv->napi, ftgmac100_poll, 64);
1234
1235 /* map io memory */
1236 priv->res = request_mem_region(res->start, resource_size(res),
1237 dev_name(&pdev->dev));
1238 if (!priv->res) {
1239 dev_err(&pdev->dev, "Could not reserve memory region\n");
1240 err = -ENOMEM;
1241 goto err_req_mem;
1242 }
1243
1244 priv->base = ioremap(res->start, resource_size(res));
1245 if (!priv->base) {
1246 dev_err(&pdev->dev, "Failed to ioremap ethernet registers\n");
1247 err = -EIO;
1248 goto err_ioremap;
1249 }
1250
1251 priv->irq = irq;
1252
1253 /* initialize mdio bus */
1254 priv->mii_bus = mdiobus_alloc();
1255 if (!priv->mii_bus) {
1256 err = -EIO;
1257 goto err_alloc_mdiobus;
1258 }
1259
1260 priv->mii_bus->name = "ftgmac100_mdio";
1261 snprintf(priv->mii_bus->id, MII_BUS_ID_SIZE, "ftgmac100_mii");
1262
1263 priv->mii_bus->priv = netdev;
1264 priv->mii_bus->read = ftgmac100_mdiobus_read;
1265 priv->mii_bus->write = ftgmac100_mdiobus_write;
1266 priv->mii_bus->reset = ftgmac100_mdiobus_reset;
1267 priv->mii_bus->irq = priv->phy_irq;
1268
1269 for (i = 0; i < PHY_MAX_ADDR; i++)
1270 priv->mii_bus->irq[i] = PHY_POLL;
1271
1272 err = mdiobus_register(priv->mii_bus);
1273 if (err) {
1274 dev_err(&pdev->dev, "Cannot register MDIO bus!\n");
1275 goto err_register_mdiobus;
1276 }
1277
1278 err = ftgmac100_mii_probe(priv);
1279 if (err) {
1280 dev_err(&pdev->dev, "MII Probe failed!\n");
1281 goto err_mii_probe;
1282 }
1283
1284 /* register network device */
1285 err = register_netdev(netdev);
1286 if (err) {
1287 dev_err(&pdev->dev, "Failed to register netdev\n");
1288 goto err_register_netdev;
1289 }
1290
1291 netdev_info(netdev, "irq %d, mapped at %p\n", priv->irq, priv->base);
1292
1293 if (!is_valid_ether_addr(netdev->dev_addr)) {
1294 eth_hw_addr_random(netdev);
1295 netdev_info(netdev, "generated random MAC address %pM\n",
1296 netdev->dev_addr);
1297 }
1298
1299 return 0;
1300
1301 err_register_netdev:
1302 phy_disconnect(priv->phydev);
1303 err_mii_probe:
1304 mdiobus_unregister(priv->mii_bus);
1305 err_register_mdiobus:
1306 mdiobus_free(priv->mii_bus);
1307 err_alloc_mdiobus:
1308 iounmap(priv->base);
1309 err_ioremap:
1310 release_resource(priv->res);
1311 err_req_mem:
1312 netif_napi_del(&priv->napi);
1313 free_netdev(netdev);
1314 err_alloc_etherdev:
1315 return err;
1316 }
1317
1318 static int __exit ftgmac100_remove(struct platform_device *pdev)
1319 {
1320 struct net_device *netdev;
1321 struct ftgmac100 *priv;
1322
1323 netdev = platform_get_drvdata(pdev);
1324 priv = netdev_priv(netdev);
1325
1326 unregister_netdev(netdev);
1327
1328 phy_disconnect(priv->phydev);
1329 mdiobus_unregister(priv->mii_bus);
1330 mdiobus_free(priv->mii_bus);
1331
1332 iounmap(priv->base);
1333 release_resource(priv->res);
1334
1335 netif_napi_del(&priv->napi);
1336 free_netdev(netdev);
1337 return 0;
1338 }
1339
1340 static struct platform_driver ftgmac100_driver = {
1341 .probe = ftgmac100_probe,
1342 .remove = __exit_p(ftgmac100_remove),
1343 .driver = {
1344 .name = DRV_NAME,
1345 .owner = THIS_MODULE,
1346 },
1347 };
1348
1349 module_platform_driver(ftgmac100_driver);
1350
1351 MODULE_AUTHOR("Po-Yu Chuang <ratbert@faraday-tech.com>");
1352 MODULE_DESCRIPTION("FTGMAC100 driver");
1353 MODULE_LICENSE("GPL");
Linux with added FPC-III support