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8d77c036 PYC |
1 | /* |
2 | * Faraday FTMAC100 10/100 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/io.h> | |
29 | #include <linux/mii.h> | |
30 | #include <linux/module.h> | |
31 | #include <linux/netdevice.h> | |
32 | #include <linux/platform_device.h> | |
33 | ||
34 | #include "ftmac100.h" | |
35 | ||
36 | #define DRV_NAME "ftmac100" | |
37 | #define DRV_VERSION "0.2" | |
38 | ||
39 | #define RX_QUEUE_ENTRIES 128 /* must be power of 2 */ | |
40 | #define TX_QUEUE_ENTRIES 16 /* must be power of 2 */ | |
41 | ||
42 | #define MAX_PKT_SIZE 1518 | |
43 | #define RX_BUF_SIZE 2044 /* must be smaller than 0x7ff */ | |
44 | ||
45 | #if MAX_PKT_SIZE > 0x7ff | |
46 | #error invalid MAX_PKT_SIZE | |
47 | #endif | |
48 | ||
49 | #if RX_BUF_SIZE > 0x7ff || RX_BUF_SIZE > PAGE_SIZE | |
50 | #error invalid RX_BUF_SIZE | |
51 | #endif | |
52 | ||
53 | /****************************************************************************** | |
54 | * private data | |
55 | *****************************************************************************/ | |
56 | struct ftmac100_descs { | |
57 | struct ftmac100_rxdes rxdes[RX_QUEUE_ENTRIES]; | |
58 | struct ftmac100_txdes txdes[TX_QUEUE_ENTRIES]; | |
59 | }; | |
60 | ||
61 | struct ftmac100 { | |
62 | struct resource *res; | |
63 | void __iomem *base; | |
64 | int irq; | |
65 | ||
66 | struct ftmac100_descs *descs; | |
67 | dma_addr_t descs_dma_addr; | |
68 | ||
69 | unsigned int rx_pointer; | |
70 | unsigned int tx_clean_pointer; | |
71 | unsigned int tx_pointer; | |
72 | unsigned int tx_pending; | |
73 | ||
74 | spinlock_t tx_lock; | |
75 | ||
76 | struct net_device *netdev; | |
77 | struct device *dev; | |
78 | struct napi_struct napi; | |
79 | ||
80 | struct mii_if_info mii; | |
81 | }; | |
82 | ||
c05e7ac9 ED |
83 | static int ftmac100_alloc_rx_page(struct ftmac100 *priv, |
84 | struct ftmac100_rxdes *rxdes, gfp_t gfp); | |
8d77c036 PYC |
85 | |
86 | /****************************************************************************** | |
87 | * internal functions (hardware register access) | |
88 | *****************************************************************************/ | |
89 | #define INT_MASK_ALL_ENABLED (FTMAC100_INT_RPKT_FINISH | \ | |
90 | FTMAC100_INT_NORXBUF | \ | |
91 | FTMAC100_INT_XPKT_OK | \ | |
92 | FTMAC100_INT_XPKT_LOST | \ | |
93 | FTMAC100_INT_RPKT_LOST | \ | |
94 | FTMAC100_INT_AHB_ERR | \ | |
95 | FTMAC100_INT_PHYSTS_CHG) | |
96 | ||
97 | #define INT_MASK_ALL_DISABLED 0 | |
98 | ||
99 | static void ftmac100_enable_all_int(struct ftmac100 *priv) | |
100 | { | |
101 | iowrite32(INT_MASK_ALL_ENABLED, priv->base + FTMAC100_OFFSET_IMR); | |
102 | } | |
103 | ||
104 | static void ftmac100_disable_all_int(struct ftmac100 *priv) | |
105 | { | |
106 | iowrite32(INT_MASK_ALL_DISABLED, priv->base + FTMAC100_OFFSET_IMR); | |
107 | } | |
108 | ||
109 | static void ftmac100_set_rx_ring_base(struct ftmac100 *priv, dma_addr_t addr) | |
110 | { | |
111 | iowrite32(addr, priv->base + FTMAC100_OFFSET_RXR_BADR); | |
112 | } | |
113 | ||
114 | static void ftmac100_set_tx_ring_base(struct ftmac100 *priv, dma_addr_t addr) | |
115 | { | |
116 | iowrite32(addr, priv->base + FTMAC100_OFFSET_TXR_BADR); | |
117 | } | |
118 | ||
119 | static void ftmac100_txdma_start_polling(struct ftmac100 *priv) | |
120 | { | |
121 | iowrite32(1, priv->base + FTMAC100_OFFSET_TXPD); | |
122 | } | |
123 | ||
124 | static int ftmac100_reset(struct ftmac100 *priv) | |
125 | { | |
126 | struct net_device *netdev = priv->netdev; | |
127 | int i; | |
128 | ||
129 | /* NOTE: reset clears all registers */ | |
130 | iowrite32(FTMAC100_MACCR_SW_RST, priv->base + FTMAC100_OFFSET_MACCR); | |
131 | ||
132 | for (i = 0; i < 5; i++) { | |
133 | unsigned int maccr; | |
134 | ||
135 | maccr = ioread32(priv->base + FTMAC100_OFFSET_MACCR); | |
136 | if (!(maccr & FTMAC100_MACCR_SW_RST)) { | |
137 | /* | |
138 | * FTMAC100_MACCR_SW_RST cleared does not indicate | |
139 | * that hardware reset completed (what the f*ck). | |
140 | * We still need to wait for a while. | |
141 | */ | |
eee9700c | 142 | udelay(500); |
8d77c036 PYC |
143 | return 0; |
144 | } | |
145 | ||
eee9700c | 146 | udelay(1000); |
8d77c036 PYC |
147 | } |
148 | ||
149 | netdev_err(netdev, "software reset failed\n"); | |
150 | return -EIO; | |
151 | } | |
152 | ||
153 | static void ftmac100_set_mac(struct ftmac100 *priv, const unsigned char *mac) | |
154 | { | |
155 | unsigned int maddr = mac[0] << 8 | mac[1]; | |
156 | unsigned int laddr = mac[2] << 24 | mac[3] << 16 | mac[4] << 8 | mac[5]; | |
157 | ||
158 | iowrite32(maddr, priv->base + FTMAC100_OFFSET_MAC_MADR); | |
159 | iowrite32(laddr, priv->base + FTMAC100_OFFSET_MAC_LADR); | |
160 | } | |
161 | ||
162 | #define MACCR_ENABLE_ALL (FTMAC100_MACCR_XMT_EN | \ | |
163 | FTMAC100_MACCR_RCV_EN | \ | |
164 | FTMAC100_MACCR_XDMA_EN | \ | |
165 | FTMAC100_MACCR_RDMA_EN | \ | |
166 | FTMAC100_MACCR_CRC_APD | \ | |
167 | FTMAC100_MACCR_FULLDUP | \ | |
168 | FTMAC100_MACCR_RX_RUNT | \ | |
169 | FTMAC100_MACCR_RX_BROADPKT) | |
170 | ||
171 | static int ftmac100_start_hw(struct ftmac100 *priv) | |
172 | { | |
173 | struct net_device *netdev = priv->netdev; | |
174 | ||
175 | if (ftmac100_reset(priv)) | |
176 | return -EIO; | |
177 | ||
178 | /* setup ring buffer base registers */ | |
179 | ftmac100_set_rx_ring_base(priv, | |
180 | priv->descs_dma_addr + | |
181 | offsetof(struct ftmac100_descs, rxdes)); | |
182 | ftmac100_set_tx_ring_base(priv, | |
183 | priv->descs_dma_addr + | |
184 | offsetof(struct ftmac100_descs, txdes)); | |
185 | ||
186 | iowrite32(FTMAC100_APTC_RXPOLL_CNT(1), priv->base + FTMAC100_OFFSET_APTC); | |
187 | ||
188 | ftmac100_set_mac(priv, netdev->dev_addr); | |
189 | ||
190 | iowrite32(MACCR_ENABLE_ALL, priv->base + FTMAC100_OFFSET_MACCR); | |
191 | return 0; | |
192 | } | |
193 | ||
194 | static void ftmac100_stop_hw(struct ftmac100 *priv) | |
195 | { | |
196 | iowrite32(0, priv->base + FTMAC100_OFFSET_MACCR); | |
197 | } | |
198 | ||
199 | /****************************************************************************** | |
200 | * internal functions (receive descriptor) | |
201 | *****************************************************************************/ | |
202 | static bool ftmac100_rxdes_first_segment(struct ftmac100_rxdes *rxdes) | |
203 | { | |
204 | return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_FRS); | |
205 | } | |
206 | ||
207 | static bool ftmac100_rxdes_last_segment(struct ftmac100_rxdes *rxdes) | |
208 | { | |
209 | return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_LRS); | |
210 | } | |
211 | ||
212 | static bool ftmac100_rxdes_owned_by_dma(struct ftmac100_rxdes *rxdes) | |
213 | { | |
214 | return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_RXDMA_OWN); | |
215 | } | |
216 | ||
217 | static void ftmac100_rxdes_set_dma_own(struct ftmac100_rxdes *rxdes) | |
218 | { | |
219 | /* clear status bits */ | |
220 | rxdes->rxdes0 = cpu_to_le32(FTMAC100_RXDES0_RXDMA_OWN); | |
221 | } | |
222 | ||
223 | static bool ftmac100_rxdes_rx_error(struct ftmac100_rxdes *rxdes) | |
224 | { | |
225 | return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_RX_ERR); | |
226 | } | |
227 | ||
228 | static bool ftmac100_rxdes_crc_error(struct ftmac100_rxdes *rxdes) | |
229 | { | |
230 | return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_CRC_ERR); | |
231 | } | |
232 | ||
233 | static bool ftmac100_rxdes_frame_too_long(struct ftmac100_rxdes *rxdes) | |
234 | { | |
235 | return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_FTL); | |
236 | } | |
237 | ||
238 | static bool ftmac100_rxdes_runt(struct ftmac100_rxdes *rxdes) | |
239 | { | |
240 | return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_RUNT); | |
241 | } | |
242 | ||
243 | static bool ftmac100_rxdes_odd_nibble(struct ftmac100_rxdes *rxdes) | |
244 | { | |
245 | return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_RX_ODD_NB); | |
246 | } | |
247 | ||
248 | static unsigned int ftmac100_rxdes_frame_length(struct ftmac100_rxdes *rxdes) | |
249 | { | |
250 | return le32_to_cpu(rxdes->rxdes0) & FTMAC100_RXDES0_RFL; | |
251 | } | |
252 | ||
253 | static bool ftmac100_rxdes_multicast(struct ftmac100_rxdes *rxdes) | |
254 | { | |
255 | return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_MULTICAST); | |
256 | } | |
257 | ||
258 | static void ftmac100_rxdes_set_buffer_size(struct ftmac100_rxdes *rxdes, | |
259 | unsigned int size) | |
260 | { | |
261 | rxdes->rxdes1 &= cpu_to_le32(FTMAC100_RXDES1_EDORR); | |
262 | rxdes->rxdes1 |= cpu_to_le32(FTMAC100_RXDES1_RXBUF_SIZE(size)); | |
263 | } | |
264 | ||
265 | static void ftmac100_rxdes_set_end_of_ring(struct ftmac100_rxdes *rxdes) | |
266 | { | |
267 | rxdes->rxdes1 |= cpu_to_le32(FTMAC100_RXDES1_EDORR); | |
268 | } | |
269 | ||
270 | static void ftmac100_rxdes_set_dma_addr(struct ftmac100_rxdes *rxdes, | |
271 | dma_addr_t addr) | |
272 | { | |
273 | rxdes->rxdes2 = cpu_to_le32(addr); | |
274 | } | |
275 | ||
276 | static dma_addr_t ftmac100_rxdes_get_dma_addr(struct ftmac100_rxdes *rxdes) | |
277 | { | |
278 | return le32_to_cpu(rxdes->rxdes2); | |
279 | } | |
280 | ||
281 | /* | |
282 | * rxdes3 is not used by hardware. We use it to keep track of page. | |
283 | * Since hardware does not touch it, we can skip cpu_to_le32()/le32_to_cpu(). | |
284 | */ | |
285 | static void ftmac100_rxdes_set_page(struct ftmac100_rxdes *rxdes, struct page *page) | |
286 | { | |
287 | rxdes->rxdes3 = (unsigned int)page; | |
288 | } | |
289 | ||
290 | static struct page *ftmac100_rxdes_get_page(struct ftmac100_rxdes *rxdes) | |
291 | { | |
292 | return (struct page *)rxdes->rxdes3; | |
293 | } | |
294 | ||
295 | /****************************************************************************** | |
296 | * internal functions (receive) | |
297 | *****************************************************************************/ | |
298 | static int ftmac100_next_rx_pointer(int pointer) | |
299 | { | |
300 | return (pointer + 1) & (RX_QUEUE_ENTRIES - 1); | |
301 | } | |
302 | ||
303 | static void ftmac100_rx_pointer_advance(struct ftmac100 *priv) | |
304 | { | |
305 | priv->rx_pointer = ftmac100_next_rx_pointer(priv->rx_pointer); | |
306 | } | |
307 | ||
308 | static struct ftmac100_rxdes *ftmac100_current_rxdes(struct ftmac100 *priv) | |
309 | { | |
310 | return &priv->descs->rxdes[priv->rx_pointer]; | |
311 | } | |
312 | ||
313 | static struct ftmac100_rxdes * | |
314 | ftmac100_rx_locate_first_segment(struct ftmac100 *priv) | |
315 | { | |
316 | struct ftmac100_rxdes *rxdes = ftmac100_current_rxdes(priv); | |
317 | ||
318 | while (!ftmac100_rxdes_owned_by_dma(rxdes)) { | |
319 | if (ftmac100_rxdes_first_segment(rxdes)) | |
320 | return rxdes; | |
321 | ||
322 | ftmac100_rxdes_set_dma_own(rxdes); | |
323 | ftmac100_rx_pointer_advance(priv); | |
324 | rxdes = ftmac100_current_rxdes(priv); | |
325 | } | |
326 | ||
327 | return NULL; | |
328 | } | |
329 | ||
330 | static bool ftmac100_rx_packet_error(struct ftmac100 *priv, | |
331 | struct ftmac100_rxdes *rxdes) | |
332 | { | |
333 | struct net_device *netdev = priv->netdev; | |
334 | bool error = false; | |
335 | ||
336 | if (unlikely(ftmac100_rxdes_rx_error(rxdes))) { | |
337 | if (net_ratelimit()) | |
338 | netdev_info(netdev, "rx err\n"); | |
339 | ||
340 | netdev->stats.rx_errors++; | |
341 | error = true; | |
342 | } | |
343 | ||
344 | if (unlikely(ftmac100_rxdes_crc_error(rxdes))) { | |
345 | if (net_ratelimit()) | |
346 | netdev_info(netdev, "rx crc err\n"); | |
347 | ||
348 | netdev->stats.rx_crc_errors++; | |
349 | error = true; | |
350 | } | |
351 | ||
352 | if (unlikely(ftmac100_rxdes_frame_too_long(rxdes))) { | |
353 | if (net_ratelimit()) | |
354 | netdev_info(netdev, "rx frame too long\n"); | |
355 | ||
356 | netdev->stats.rx_length_errors++; | |
357 | error = true; | |
358 | } else if (unlikely(ftmac100_rxdes_runt(rxdes))) { | |
359 | if (net_ratelimit()) | |
360 | netdev_info(netdev, "rx runt\n"); | |
361 | ||
362 | netdev->stats.rx_length_errors++; | |
363 | error = true; | |
364 | } else if (unlikely(ftmac100_rxdes_odd_nibble(rxdes))) { | |
365 | if (net_ratelimit()) | |
366 | netdev_info(netdev, "rx odd nibble\n"); | |
367 | ||
368 | netdev->stats.rx_length_errors++; | |
369 | error = true; | |
370 | } | |
371 | ||
372 | return error; | |
373 | } | |
374 | ||
375 | static void ftmac100_rx_drop_packet(struct ftmac100 *priv) | |
376 | { | |
377 | struct net_device *netdev = priv->netdev; | |
378 | struct ftmac100_rxdes *rxdes = ftmac100_current_rxdes(priv); | |
379 | bool done = false; | |
380 | ||
381 | if (net_ratelimit()) | |
382 | netdev_dbg(netdev, "drop packet %p\n", rxdes); | |
383 | ||
384 | do { | |
385 | if (ftmac100_rxdes_last_segment(rxdes)) | |
386 | done = true; | |
387 | ||
388 | ftmac100_rxdes_set_dma_own(rxdes); | |
389 | ftmac100_rx_pointer_advance(priv); | |
390 | rxdes = ftmac100_current_rxdes(priv); | |
391 | } while (!done && !ftmac100_rxdes_owned_by_dma(rxdes)); | |
392 | ||
393 | netdev->stats.rx_dropped++; | |
394 | } | |
395 | ||
396 | static bool ftmac100_rx_packet(struct ftmac100 *priv, int *processed) | |
397 | { | |
398 | struct net_device *netdev = priv->netdev; | |
399 | struct ftmac100_rxdes *rxdes; | |
400 | struct sk_buff *skb; | |
401 | struct page *page; | |
402 | dma_addr_t map; | |
403 | int length; | |
404 | ||
405 | rxdes = ftmac100_rx_locate_first_segment(priv); | |
406 | if (!rxdes) | |
407 | return false; | |
408 | ||
409 | if (unlikely(ftmac100_rx_packet_error(priv, rxdes))) { | |
410 | ftmac100_rx_drop_packet(priv); | |
411 | return true; | |
412 | } | |
413 | ||
414 | /* | |
415 | * It is impossible to get multi-segment packets | |
416 | * because we always provide big enough receive buffers. | |
417 | */ | |
418 | if (unlikely(!ftmac100_rxdes_last_segment(rxdes))) | |
419 | BUG(); | |
420 | ||
421 | /* start processing */ | |
422 | skb = netdev_alloc_skb_ip_align(netdev, 128); | |
423 | if (unlikely(!skb)) { | |
424 | if (net_ratelimit()) | |
425 | netdev_err(netdev, "rx skb alloc failed\n"); | |
426 | ||
427 | ftmac100_rx_drop_packet(priv); | |
428 | return true; | |
429 | } | |
430 | ||
431 | if (unlikely(ftmac100_rxdes_multicast(rxdes))) | |
432 | netdev->stats.multicast++; | |
433 | ||
434 | map = ftmac100_rxdes_get_dma_addr(rxdes); | |
435 | dma_unmap_page(priv->dev, map, RX_BUF_SIZE, DMA_FROM_DEVICE); | |
436 | ||
437 | length = ftmac100_rxdes_frame_length(rxdes); | |
438 | page = ftmac100_rxdes_get_page(rxdes); | |
439 | skb_fill_page_desc(skb, 0, page, 0, length); | |
440 | skb->len += length; | |
441 | skb->data_len += length; | |
442 | skb->truesize += length; | |
443 | __pskb_pull_tail(skb, min(length, 64)); | |
444 | ||
c05e7ac9 | 445 | ftmac100_alloc_rx_page(priv, rxdes, GFP_ATOMIC); |
8d77c036 PYC |
446 | |
447 | ftmac100_rx_pointer_advance(priv); | |
448 | ||
449 | skb->protocol = eth_type_trans(skb, netdev); | |
450 | ||
451 | netdev->stats.rx_packets++; | |
452 | netdev->stats.rx_bytes += skb->len; | |
453 | ||
454 | /* push packet to protocol stack */ | |
455 | netif_receive_skb(skb); | |
456 | ||
457 | (*processed)++; | |
458 | return true; | |
459 | } | |
460 | ||
461 | /****************************************************************************** | |
462 | * internal functions (transmit descriptor) | |
463 | *****************************************************************************/ | |
464 | static void ftmac100_txdes_reset(struct ftmac100_txdes *txdes) | |
465 | { | |
466 | /* clear all except end of ring bit */ | |
467 | txdes->txdes0 = 0; | |
468 | txdes->txdes1 &= cpu_to_le32(FTMAC100_TXDES1_EDOTR); | |
469 | txdes->txdes2 = 0; | |
470 | txdes->txdes3 = 0; | |
471 | } | |
472 | ||
473 | static bool ftmac100_txdes_owned_by_dma(struct ftmac100_txdes *txdes) | |
474 | { | |
475 | return txdes->txdes0 & cpu_to_le32(FTMAC100_TXDES0_TXDMA_OWN); | |
476 | } | |
477 | ||
478 | static void ftmac100_txdes_set_dma_own(struct ftmac100_txdes *txdes) | |
479 | { | |
480 | /* | |
481 | * Make sure dma own bit will not be set before any other | |
482 | * descriptor fields. | |
483 | */ | |
484 | wmb(); | |
485 | txdes->txdes0 |= cpu_to_le32(FTMAC100_TXDES0_TXDMA_OWN); | |
486 | } | |
487 | ||
488 | static bool ftmac100_txdes_excessive_collision(struct ftmac100_txdes *txdes) | |
489 | { | |
490 | return txdes->txdes0 & cpu_to_le32(FTMAC100_TXDES0_TXPKT_EXSCOL); | |
491 | } | |
492 | ||
493 | static bool ftmac100_txdes_late_collision(struct ftmac100_txdes *txdes) | |
494 | { | |
495 | return txdes->txdes0 & cpu_to_le32(FTMAC100_TXDES0_TXPKT_LATECOL); | |
496 | } | |
497 | ||
498 | static void ftmac100_txdes_set_end_of_ring(struct ftmac100_txdes *txdes) | |
499 | { | |
500 | txdes->txdes1 |= cpu_to_le32(FTMAC100_TXDES1_EDOTR); | |
501 | } | |
502 | ||
503 | static void ftmac100_txdes_set_first_segment(struct ftmac100_txdes *txdes) | |
504 | { | |
505 | txdes->txdes1 |= cpu_to_le32(FTMAC100_TXDES1_FTS); | |
506 | } | |
507 | ||
508 | static void ftmac100_txdes_set_last_segment(struct ftmac100_txdes *txdes) | |
509 | { | |
510 | txdes->txdes1 |= cpu_to_le32(FTMAC100_TXDES1_LTS); | |
511 | } | |
512 | ||
513 | static void ftmac100_txdes_set_txint(struct ftmac100_txdes *txdes) | |
514 | { | |
515 | txdes->txdes1 |= cpu_to_le32(FTMAC100_TXDES1_TXIC); | |
516 | } | |
517 | ||
518 | static void ftmac100_txdes_set_buffer_size(struct ftmac100_txdes *txdes, | |
519 | unsigned int len) | |
520 | { | |
521 | txdes->txdes1 |= cpu_to_le32(FTMAC100_TXDES1_TXBUF_SIZE(len)); | |
522 | } | |
523 | ||
524 | static void ftmac100_txdes_set_dma_addr(struct ftmac100_txdes *txdes, | |
525 | dma_addr_t addr) | |
526 | { | |
527 | txdes->txdes2 = cpu_to_le32(addr); | |
528 | } | |
529 | ||
530 | static dma_addr_t ftmac100_txdes_get_dma_addr(struct ftmac100_txdes *txdes) | |
531 | { | |
532 | return le32_to_cpu(txdes->txdes2); | |
533 | } | |
534 | ||
535 | /* | |
536 | * txdes3 is not used by hardware. We use it to keep track of socket buffer. | |
537 | * Since hardware does not touch it, we can skip cpu_to_le32()/le32_to_cpu(). | |
538 | */ | |
539 | static void ftmac100_txdes_set_skb(struct ftmac100_txdes *txdes, struct sk_buff *skb) | |
540 | { | |
541 | txdes->txdes3 = (unsigned int)skb; | |
542 | } | |
543 | ||
544 | static struct sk_buff *ftmac100_txdes_get_skb(struct ftmac100_txdes *txdes) | |
545 | { | |
546 | return (struct sk_buff *)txdes->txdes3; | |
547 | } | |
548 | ||
549 | /****************************************************************************** | |
550 | * internal functions (transmit) | |
551 | *****************************************************************************/ | |
552 | static int ftmac100_next_tx_pointer(int pointer) | |
553 | { | |
554 | return (pointer + 1) & (TX_QUEUE_ENTRIES - 1); | |
555 | } | |
556 | ||
557 | static void ftmac100_tx_pointer_advance(struct ftmac100 *priv) | |
558 | { | |
559 | priv->tx_pointer = ftmac100_next_tx_pointer(priv->tx_pointer); | |
560 | } | |
561 | ||
562 | static void ftmac100_tx_clean_pointer_advance(struct ftmac100 *priv) | |
563 | { | |
564 | priv->tx_clean_pointer = ftmac100_next_tx_pointer(priv->tx_clean_pointer); | |
565 | } | |
566 | ||
567 | static struct ftmac100_txdes *ftmac100_current_txdes(struct ftmac100 *priv) | |
568 | { | |
569 | return &priv->descs->txdes[priv->tx_pointer]; | |
570 | } | |
571 | ||
572 | static struct ftmac100_txdes *ftmac100_current_clean_txdes(struct ftmac100 *priv) | |
573 | { | |
574 | return &priv->descs->txdes[priv->tx_clean_pointer]; | |
575 | } | |
576 | ||
577 | static bool ftmac100_tx_complete_packet(struct ftmac100 *priv) | |
578 | { | |
579 | struct net_device *netdev = priv->netdev; | |
580 | struct ftmac100_txdes *txdes; | |
581 | struct sk_buff *skb; | |
582 | dma_addr_t map; | |
583 | ||
584 | if (priv->tx_pending == 0) | |
585 | return false; | |
586 | ||
587 | txdes = ftmac100_current_clean_txdes(priv); | |
588 | ||
589 | if (ftmac100_txdes_owned_by_dma(txdes)) | |
590 | return false; | |
591 | ||
592 | skb = ftmac100_txdes_get_skb(txdes); | |
593 | map = ftmac100_txdes_get_dma_addr(txdes); | |
594 | ||
595 | if (unlikely(ftmac100_txdes_excessive_collision(txdes) || | |
596 | ftmac100_txdes_late_collision(txdes))) { | |
597 | /* | |
598 | * packet transmitted to ethernet lost due to late collision | |
599 | * or excessive collision | |
600 | */ | |
601 | netdev->stats.tx_aborted_errors++; | |
602 | } else { | |
603 | netdev->stats.tx_packets++; | |
604 | netdev->stats.tx_bytes += skb->len; | |
605 | } | |
606 | ||
607 | dma_unmap_single(priv->dev, map, skb_headlen(skb), DMA_TO_DEVICE); | |
608 | dev_kfree_skb(skb); | |
609 | ||
610 | ftmac100_txdes_reset(txdes); | |
611 | ||
612 | ftmac100_tx_clean_pointer_advance(priv); | |
613 | ||
614 | spin_lock(&priv->tx_lock); | |
615 | priv->tx_pending--; | |
616 | spin_unlock(&priv->tx_lock); | |
617 | netif_wake_queue(netdev); | |
618 | ||
619 | return true; | |
620 | } | |
621 | ||
622 | static void ftmac100_tx_complete(struct ftmac100 *priv) | |
623 | { | |
624 | while (ftmac100_tx_complete_packet(priv)) | |
625 | ; | |
626 | } | |
627 | ||
628 | static int ftmac100_xmit(struct ftmac100 *priv, struct sk_buff *skb, | |
629 | dma_addr_t map) | |
630 | { | |
631 | struct net_device *netdev = priv->netdev; | |
632 | struct ftmac100_txdes *txdes; | |
633 | unsigned int len = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len; | |
634 | ||
635 | txdes = ftmac100_current_txdes(priv); | |
636 | ftmac100_tx_pointer_advance(priv); | |
637 | ||
638 | /* setup TX descriptor */ | |
639 | ftmac100_txdes_set_skb(txdes, skb); | |
640 | ftmac100_txdes_set_dma_addr(txdes, map); | |
641 | ||
642 | ftmac100_txdes_set_first_segment(txdes); | |
643 | ftmac100_txdes_set_last_segment(txdes); | |
644 | ftmac100_txdes_set_txint(txdes); | |
645 | ftmac100_txdes_set_buffer_size(txdes, len); | |
646 | ||
647 | spin_lock(&priv->tx_lock); | |
648 | priv->tx_pending++; | |
649 | if (priv->tx_pending == TX_QUEUE_ENTRIES) | |
650 | netif_stop_queue(netdev); | |
651 | ||
652 | /* start transmit */ | |
653 | ftmac100_txdes_set_dma_own(txdes); | |
654 | spin_unlock(&priv->tx_lock); | |
655 | ||
656 | ftmac100_txdma_start_polling(priv); | |
657 | return NETDEV_TX_OK; | |
658 | } | |
659 | ||
660 | /****************************************************************************** | |
661 | * internal functions (buffer) | |
662 | *****************************************************************************/ | |
c05e7ac9 ED |
663 | static int ftmac100_alloc_rx_page(struct ftmac100 *priv, |
664 | struct ftmac100_rxdes *rxdes, gfp_t gfp) | |
8d77c036 PYC |
665 | { |
666 | struct net_device *netdev = priv->netdev; | |
667 | struct page *page; | |
668 | dma_addr_t map; | |
669 | ||
c05e7ac9 | 670 | page = alloc_page(gfp); |
8d77c036 PYC |
671 | if (!page) { |
672 | if (net_ratelimit()) | |
673 | netdev_err(netdev, "failed to allocate rx page\n"); | |
674 | return -ENOMEM; | |
675 | } | |
676 | ||
677 | map = dma_map_page(priv->dev, page, 0, RX_BUF_SIZE, DMA_FROM_DEVICE); | |
678 | if (unlikely(dma_mapping_error(priv->dev, map))) { | |
679 | if (net_ratelimit()) | |
680 | netdev_err(netdev, "failed to map rx page\n"); | |
681 | __free_page(page); | |
682 | return -ENOMEM; | |
683 | } | |
684 | ||
685 | ftmac100_rxdes_set_page(rxdes, page); | |
686 | ftmac100_rxdes_set_dma_addr(rxdes, map); | |
687 | ftmac100_rxdes_set_buffer_size(rxdes, RX_BUF_SIZE); | |
688 | ftmac100_rxdes_set_dma_own(rxdes); | |
689 | return 0; | |
690 | } | |
691 | ||
692 | static void ftmac100_free_buffers(struct ftmac100 *priv) | |
693 | { | |
694 | int i; | |
695 | ||
696 | for (i = 0; i < RX_QUEUE_ENTRIES; i++) { | |
697 | struct ftmac100_rxdes *rxdes = &priv->descs->rxdes[i]; | |
698 | struct page *page = ftmac100_rxdes_get_page(rxdes); | |
699 | dma_addr_t map = ftmac100_rxdes_get_dma_addr(rxdes); | |
700 | ||
701 | if (!page) | |
702 | continue; | |
703 | ||
704 | dma_unmap_page(priv->dev, map, RX_BUF_SIZE, DMA_FROM_DEVICE); | |
705 | __free_page(page); | |
706 | } | |
707 | ||
708 | for (i = 0; i < TX_QUEUE_ENTRIES; i++) { | |
709 | struct ftmac100_txdes *txdes = &priv->descs->txdes[i]; | |
710 | struct sk_buff *skb = ftmac100_txdes_get_skb(txdes); | |
711 | dma_addr_t map = ftmac100_txdes_get_dma_addr(txdes); | |
712 | ||
713 | if (!skb) | |
714 | continue; | |
715 | ||
716 | dma_unmap_single(priv->dev, map, skb_headlen(skb), DMA_TO_DEVICE); | |
717 | dev_kfree_skb(skb); | |
718 | } | |
719 | ||
720 | dma_free_coherent(priv->dev, sizeof(struct ftmac100_descs), | |
721 | priv->descs, priv->descs_dma_addr); | |
722 | } | |
723 | ||
724 | static int ftmac100_alloc_buffers(struct ftmac100 *priv) | |
725 | { | |
726 | int i; | |
727 | ||
728 | priv->descs = dma_alloc_coherent(priv->dev, sizeof(struct ftmac100_descs), | |
729 | &priv->descs_dma_addr, GFP_KERNEL); | |
730 | if (!priv->descs) | |
731 | return -ENOMEM; | |
732 | ||
733 | memset(priv->descs, 0, sizeof(struct ftmac100_descs)); | |
734 | ||
735 | /* initialize RX ring */ | |
736 | ftmac100_rxdes_set_end_of_ring(&priv->descs->rxdes[RX_QUEUE_ENTRIES - 1]); | |
737 | ||
738 | for (i = 0; i < RX_QUEUE_ENTRIES; i++) { | |
739 | struct ftmac100_rxdes *rxdes = &priv->descs->rxdes[i]; | |
740 | ||
c05e7ac9 | 741 | if (ftmac100_alloc_rx_page(priv, rxdes, GFP_KERNEL)) |
8d77c036 PYC |
742 | goto err; |
743 | } | |
744 | ||
745 | /* initialize TX ring */ | |
746 | ftmac100_txdes_set_end_of_ring(&priv->descs->txdes[TX_QUEUE_ENTRIES - 1]); | |
747 | return 0; | |
748 | ||
749 | err: | |
750 | ftmac100_free_buffers(priv); | |
751 | return -ENOMEM; | |
752 | } | |
753 | ||
754 | /****************************************************************************** | |
755 | * struct mii_if_info functions | |
756 | *****************************************************************************/ | |
757 | static int ftmac100_mdio_read(struct net_device *netdev, int phy_id, int reg) | |
758 | { | |
759 | struct ftmac100 *priv = netdev_priv(netdev); | |
760 | unsigned int phycr; | |
761 | int i; | |
762 | ||
763 | phycr = FTMAC100_PHYCR_PHYAD(phy_id) | | |
764 | FTMAC100_PHYCR_REGAD(reg) | | |
765 | FTMAC100_PHYCR_MIIRD; | |
766 | ||
767 | iowrite32(phycr, priv->base + FTMAC100_OFFSET_PHYCR); | |
768 | ||
769 | for (i = 0; i < 10; i++) { | |
770 | phycr = ioread32(priv->base + FTMAC100_OFFSET_PHYCR); | |
771 | ||
772 | if ((phycr & FTMAC100_PHYCR_MIIRD) == 0) | |
773 | return phycr & FTMAC100_PHYCR_MIIRDATA; | |
774 | ||
eee9700c | 775 | udelay(100); |
8d77c036 PYC |
776 | } |
777 | ||
778 | netdev_err(netdev, "mdio read timed out\n"); | |
779 | return 0; | |
780 | } | |
781 | ||
782 | static void ftmac100_mdio_write(struct net_device *netdev, int phy_id, int reg, | |
783 | int data) | |
784 | { | |
785 | struct ftmac100 *priv = netdev_priv(netdev); | |
786 | unsigned int phycr; | |
787 | int i; | |
788 | ||
789 | phycr = FTMAC100_PHYCR_PHYAD(phy_id) | | |
790 | FTMAC100_PHYCR_REGAD(reg) | | |
791 | FTMAC100_PHYCR_MIIWR; | |
792 | ||
793 | data = FTMAC100_PHYWDATA_MIIWDATA(data); | |
794 | ||
795 | iowrite32(data, priv->base + FTMAC100_OFFSET_PHYWDATA); | |
796 | iowrite32(phycr, priv->base + FTMAC100_OFFSET_PHYCR); | |
797 | ||
798 | for (i = 0; i < 10; i++) { | |
799 | phycr = ioread32(priv->base + FTMAC100_OFFSET_PHYCR); | |
800 | ||
801 | if ((phycr & FTMAC100_PHYCR_MIIWR) == 0) | |
802 | return; | |
803 | ||
eee9700c | 804 | udelay(100); |
8d77c036 PYC |
805 | } |
806 | ||
807 | netdev_err(netdev, "mdio write timed out\n"); | |
808 | } | |
809 | ||
810 | /****************************************************************************** | |
811 | * struct ethtool_ops functions | |
812 | *****************************************************************************/ | |
813 | static void ftmac100_get_drvinfo(struct net_device *netdev, | |
814 | struct ethtool_drvinfo *info) | |
815 | { | |
816 | strcpy(info->driver, DRV_NAME); | |
817 | strcpy(info->version, DRV_VERSION); | |
818 | strcpy(info->bus_info, dev_name(&netdev->dev)); | |
819 | } | |
820 | ||
821 | static int ftmac100_get_settings(struct net_device *netdev, struct ethtool_cmd *cmd) | |
822 | { | |
823 | struct ftmac100 *priv = netdev_priv(netdev); | |
824 | return mii_ethtool_gset(&priv->mii, cmd); | |
825 | } | |
826 | ||
827 | static int ftmac100_set_settings(struct net_device *netdev, struct ethtool_cmd *cmd) | |
828 | { | |
829 | struct ftmac100 *priv = netdev_priv(netdev); | |
830 | return mii_ethtool_sset(&priv->mii, cmd); | |
831 | } | |
832 | ||
833 | static int ftmac100_nway_reset(struct net_device *netdev) | |
834 | { | |
835 | struct ftmac100 *priv = netdev_priv(netdev); | |
836 | return mii_nway_restart(&priv->mii); | |
837 | } | |
838 | ||
839 | static u32 ftmac100_get_link(struct net_device *netdev) | |
840 | { | |
841 | struct ftmac100 *priv = netdev_priv(netdev); | |
842 | return mii_link_ok(&priv->mii); | |
843 | } | |
844 | ||
845 | static const struct ethtool_ops ftmac100_ethtool_ops = { | |
846 | .set_settings = ftmac100_set_settings, | |
847 | .get_settings = ftmac100_get_settings, | |
848 | .get_drvinfo = ftmac100_get_drvinfo, | |
849 | .nway_reset = ftmac100_nway_reset, | |
850 | .get_link = ftmac100_get_link, | |
851 | }; | |
852 | ||
853 | /****************************************************************************** | |
854 | * interrupt handler | |
855 | *****************************************************************************/ | |
856 | static irqreturn_t ftmac100_interrupt(int irq, void *dev_id) | |
857 | { | |
858 | struct net_device *netdev = dev_id; | |
859 | struct ftmac100 *priv = netdev_priv(netdev); | |
860 | ||
861 | if (likely(netif_running(netdev))) { | |
862 | /* Disable interrupts for polling */ | |
863 | ftmac100_disable_all_int(priv); | |
864 | napi_schedule(&priv->napi); | |
865 | } | |
866 | ||
867 | return IRQ_HANDLED; | |
868 | } | |
869 | ||
870 | /****************************************************************************** | |
871 | * struct napi_struct functions | |
872 | *****************************************************************************/ | |
873 | static int ftmac100_poll(struct napi_struct *napi, int budget) | |
874 | { | |
875 | struct ftmac100 *priv = container_of(napi, struct ftmac100, napi); | |
876 | struct net_device *netdev = priv->netdev; | |
877 | unsigned int status; | |
878 | bool completed = true; | |
879 | int rx = 0; | |
880 | ||
881 | status = ioread32(priv->base + FTMAC100_OFFSET_ISR); | |
882 | ||
883 | if (status & (FTMAC100_INT_RPKT_FINISH | FTMAC100_INT_NORXBUF)) { | |
884 | /* | |
885 | * FTMAC100_INT_RPKT_FINISH: | |
886 | * RX DMA has received packets into RX buffer successfully | |
887 | * | |
888 | * FTMAC100_INT_NORXBUF: | |
889 | * RX buffer unavailable | |
890 | */ | |
891 | bool retry; | |
892 | ||
893 | do { | |
894 | retry = ftmac100_rx_packet(priv, &rx); | |
895 | } while (retry && rx < budget); | |
896 | ||
897 | if (retry && rx == budget) | |
898 | completed = false; | |
899 | } | |
900 | ||
901 | if (status & (FTMAC100_INT_XPKT_OK | FTMAC100_INT_XPKT_LOST)) { | |
902 | /* | |
903 | * FTMAC100_INT_XPKT_OK: | |
904 | * packet transmitted to ethernet successfully | |
905 | * | |
906 | * FTMAC100_INT_XPKT_LOST: | |
907 | * packet transmitted to ethernet lost due to late | |
908 | * collision or excessive collision | |
909 | */ | |
910 | ftmac100_tx_complete(priv); | |
911 | } | |
912 | ||
913 | if (status & (FTMAC100_INT_NORXBUF | FTMAC100_INT_RPKT_LOST | | |
914 | FTMAC100_INT_AHB_ERR | FTMAC100_INT_PHYSTS_CHG)) { | |
915 | if (net_ratelimit()) | |
916 | netdev_info(netdev, "[ISR] = 0x%x: %s%s%s%s\n", status, | |
917 | status & FTMAC100_INT_NORXBUF ? "NORXBUF " : "", | |
918 | status & FTMAC100_INT_RPKT_LOST ? "RPKT_LOST " : "", | |
919 | status & FTMAC100_INT_AHB_ERR ? "AHB_ERR " : "", | |
920 | status & FTMAC100_INT_PHYSTS_CHG ? "PHYSTS_CHG" : ""); | |
921 | ||
922 | if (status & FTMAC100_INT_NORXBUF) { | |
923 | /* RX buffer unavailable */ | |
924 | netdev->stats.rx_over_errors++; | |
925 | } | |
926 | ||
927 | if (status & FTMAC100_INT_RPKT_LOST) { | |
928 | /* received packet lost due to RX FIFO full */ | |
929 | netdev->stats.rx_fifo_errors++; | |
930 | } | |
931 | ||
932 | if (status & FTMAC100_INT_PHYSTS_CHG) { | |
933 | /* PHY link status change */ | |
934 | mii_check_link(&priv->mii); | |
935 | } | |
936 | } | |
937 | ||
938 | if (completed) { | |
939 | /* stop polling */ | |
940 | napi_complete(napi); | |
941 | ftmac100_enable_all_int(priv); | |
942 | } | |
943 | ||
944 | return rx; | |
945 | } | |
946 | ||
947 | /****************************************************************************** | |
948 | * struct net_device_ops functions | |
949 | *****************************************************************************/ | |
950 | static int ftmac100_open(struct net_device *netdev) | |
951 | { | |
952 | struct ftmac100 *priv = netdev_priv(netdev); | |
953 | int err; | |
954 | ||
955 | err = ftmac100_alloc_buffers(priv); | |
956 | if (err) { | |
957 | netdev_err(netdev, "failed to allocate buffers\n"); | |
958 | goto err_alloc; | |
959 | } | |
960 | ||
961 | err = request_irq(priv->irq, ftmac100_interrupt, 0, netdev->name, netdev); | |
962 | if (err) { | |
963 | netdev_err(netdev, "failed to request irq %d\n", priv->irq); | |
964 | goto err_irq; | |
965 | } | |
966 | ||
967 | priv->rx_pointer = 0; | |
968 | priv->tx_clean_pointer = 0; | |
969 | priv->tx_pointer = 0; | |
970 | priv->tx_pending = 0; | |
971 | ||
972 | err = ftmac100_start_hw(priv); | |
973 | if (err) | |
974 | goto err_hw; | |
975 | ||
976 | napi_enable(&priv->napi); | |
977 | netif_start_queue(netdev); | |
978 | ||
979 | ftmac100_enable_all_int(priv); | |
980 | ||
981 | return 0; | |
982 | ||
983 | err_hw: | |
984 | free_irq(priv->irq, netdev); | |
985 | err_irq: | |
986 | ftmac100_free_buffers(priv); | |
987 | err_alloc: | |
988 | return err; | |
989 | } | |
990 | ||
991 | static int ftmac100_stop(struct net_device *netdev) | |
992 | { | |
993 | struct ftmac100 *priv = netdev_priv(netdev); | |
994 | ||
995 | ftmac100_disable_all_int(priv); | |
996 | netif_stop_queue(netdev); | |
997 | napi_disable(&priv->napi); | |
998 | ftmac100_stop_hw(priv); | |
999 | free_irq(priv->irq, netdev); | |
1000 | ftmac100_free_buffers(priv); | |
1001 | ||
1002 | return 0; | |
1003 | } | |
1004 | ||
1005 | static int ftmac100_hard_start_xmit(struct sk_buff *skb, struct net_device *netdev) | |
1006 | { | |
1007 | struct ftmac100 *priv = netdev_priv(netdev); | |
1008 | dma_addr_t map; | |
1009 | ||
1010 | if (unlikely(skb->len > MAX_PKT_SIZE)) { | |
1011 | if (net_ratelimit()) | |
1012 | netdev_dbg(netdev, "tx packet too big\n"); | |
1013 | ||
1014 | netdev->stats.tx_dropped++; | |
1015 | dev_kfree_skb(skb); | |
1016 | return NETDEV_TX_OK; | |
1017 | } | |
1018 | ||
1019 | map = dma_map_single(priv->dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); | |
1020 | if (unlikely(dma_mapping_error(priv->dev, map))) { | |
1021 | /* drop packet */ | |
1022 | if (net_ratelimit()) | |
1023 | netdev_err(netdev, "map socket buffer failed\n"); | |
1024 | ||
1025 | netdev->stats.tx_dropped++; | |
1026 | dev_kfree_skb(skb); | |
1027 | return NETDEV_TX_OK; | |
1028 | } | |
1029 | ||
1030 | return ftmac100_xmit(priv, skb, map); | |
1031 | } | |
1032 | ||
1033 | /* optional */ | |
1034 | static int ftmac100_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) | |
1035 | { | |
1036 | struct ftmac100 *priv = netdev_priv(netdev); | |
1037 | struct mii_ioctl_data *data = if_mii(ifr); | |
1038 | ||
1039 | return generic_mii_ioctl(&priv->mii, data, cmd, NULL); | |
1040 | } | |
1041 | ||
1042 | static const struct net_device_ops ftmac100_netdev_ops = { | |
1043 | .ndo_open = ftmac100_open, | |
1044 | .ndo_stop = ftmac100_stop, | |
1045 | .ndo_start_xmit = ftmac100_hard_start_xmit, | |
1046 | .ndo_set_mac_address = eth_mac_addr, | |
1047 | .ndo_validate_addr = eth_validate_addr, | |
1048 | .ndo_do_ioctl = ftmac100_do_ioctl, | |
1049 | }; | |
1050 | ||
1051 | /****************************************************************************** | |
1052 | * struct platform_driver functions | |
1053 | *****************************************************************************/ | |
1054 | static int ftmac100_probe(struct platform_device *pdev) | |
1055 | { | |
1056 | struct resource *res; | |
1057 | int irq; | |
1058 | struct net_device *netdev; | |
1059 | struct ftmac100 *priv; | |
1060 | int err; | |
1061 | ||
1062 | if (!pdev) | |
1063 | return -ENODEV; | |
1064 | ||
1065 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1066 | if (!res) | |
1067 | return -ENXIO; | |
1068 | ||
1069 | irq = platform_get_irq(pdev, 0); | |
1070 | if (irq < 0) | |
1071 | return irq; | |
1072 | ||
1073 | /* setup net_device */ | |
1074 | netdev = alloc_etherdev(sizeof(*priv)); | |
1075 | if (!netdev) { | |
1076 | err = -ENOMEM; | |
1077 | goto err_alloc_etherdev; | |
1078 | } | |
1079 | ||
1080 | SET_NETDEV_DEV(netdev, &pdev->dev); | |
1081 | SET_ETHTOOL_OPS(netdev, &ftmac100_ethtool_ops); | |
1082 | netdev->netdev_ops = &ftmac100_netdev_ops; | |
1083 | ||
1084 | platform_set_drvdata(pdev, netdev); | |
1085 | ||
1086 | /* setup private data */ | |
1087 | priv = netdev_priv(netdev); | |
1088 | priv->netdev = netdev; | |
1089 | priv->dev = &pdev->dev; | |
1090 | ||
1091 | spin_lock_init(&priv->tx_lock); | |
1092 | ||
1093 | /* initialize NAPI */ | |
1094 | netif_napi_add(netdev, &priv->napi, ftmac100_poll, 64); | |
1095 | ||
1096 | /* map io memory */ | |
1097 | priv->res = request_mem_region(res->start, resource_size(res), | |
1098 | dev_name(&pdev->dev)); | |
1099 | if (!priv->res) { | |
1100 | dev_err(&pdev->dev, "Could not reserve memory region\n"); | |
1101 | err = -ENOMEM; | |
1102 | goto err_req_mem; | |
1103 | } | |
1104 | ||
93d03203 | 1105 | priv->base = ioremap(res->start, resource_size(res)); |
8d77c036 PYC |
1106 | if (!priv->base) { |
1107 | dev_err(&pdev->dev, "Failed to ioremap ethernet registers\n"); | |
1108 | err = -EIO; | |
1109 | goto err_ioremap; | |
1110 | } | |
1111 | ||
1112 | priv->irq = irq; | |
1113 | ||
1114 | /* initialize struct mii_if_info */ | |
1115 | priv->mii.phy_id = 0; | |
1116 | priv->mii.phy_id_mask = 0x1f; | |
1117 | priv->mii.reg_num_mask = 0x1f; | |
1118 | priv->mii.dev = netdev; | |
1119 | priv->mii.mdio_read = ftmac100_mdio_read; | |
1120 | priv->mii.mdio_write = ftmac100_mdio_write; | |
1121 | ||
1122 | /* register network device */ | |
1123 | err = register_netdev(netdev); | |
1124 | if (err) { | |
1125 | dev_err(&pdev->dev, "Failed to register netdev\n"); | |
1126 | goto err_register_netdev; | |
1127 | } | |
1128 | ||
1129 | netdev_info(netdev, "irq %d, mapped at %p\n", priv->irq, priv->base); | |
1130 | ||
1131 | if (!is_valid_ether_addr(netdev->dev_addr)) { | |
1132 | random_ether_addr(netdev->dev_addr); | |
1133 | netdev_info(netdev, "generated random MAC address %pM\n", | |
1134 | netdev->dev_addr); | |
1135 | } | |
1136 | ||
1137 | return 0; | |
1138 | ||
1139 | err_register_netdev: | |
1140 | iounmap(priv->base); | |
1141 | err_ioremap: | |
1142 | release_resource(priv->res); | |
1143 | err_req_mem: | |
1144 | netif_napi_del(&priv->napi); | |
1145 | platform_set_drvdata(pdev, NULL); | |
1146 | free_netdev(netdev); | |
1147 | err_alloc_etherdev: | |
1148 | return err; | |
1149 | } | |
1150 | ||
1151 | static int __exit ftmac100_remove(struct platform_device *pdev) | |
1152 | { | |
1153 | struct net_device *netdev; | |
1154 | struct ftmac100 *priv; | |
1155 | ||
1156 | netdev = platform_get_drvdata(pdev); | |
1157 | priv = netdev_priv(netdev); | |
1158 | ||
1159 | unregister_netdev(netdev); | |
1160 | ||
1161 | iounmap(priv->base); | |
1162 | release_resource(priv->res); | |
1163 | ||
1164 | netif_napi_del(&priv->napi); | |
1165 | platform_set_drvdata(pdev, NULL); | |
1166 | free_netdev(netdev); | |
1167 | return 0; | |
1168 | } | |
1169 | ||
1170 | static struct platform_driver ftmac100_driver = { | |
1171 | .probe = ftmac100_probe, | |
1172 | .remove = __exit_p(ftmac100_remove), | |
1173 | .driver = { | |
1174 | .name = DRV_NAME, | |
1175 | .owner = THIS_MODULE, | |
1176 | }, | |
1177 | }; | |
1178 | ||
1179 | /****************************************************************************** | |
1180 | * initialization / finalization | |
1181 | *****************************************************************************/ | |
1182 | static int __init ftmac100_init(void) | |
1183 | { | |
1184 | pr_info("Loading version " DRV_VERSION " ...\n"); | |
1185 | return platform_driver_register(&ftmac100_driver); | |
1186 | } | |
1187 | ||
1188 | static void __exit ftmac100_exit(void) | |
1189 | { | |
1190 | platform_driver_unregister(&ftmac100_driver); | |
1191 | } | |
1192 | ||
1193 | module_init(ftmac100_init); | |
1194 | module_exit(ftmac100_exit); | |
1195 | ||
1196 | MODULE_AUTHOR("Po-Yu Chuang <ratbert@faraday-tech.com>"); | |
1197 | MODULE_DESCRIPTION("FTMAC100 driver"); | |
1198 | MODULE_LICENSE("GPL"); |