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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> | |
17f1bbca | 28 | #include <linux/interrupt.h> |
8d77c036 PYC |
29 | #include <linux/io.h> |
30 | #include <linux/mii.h> | |
31 | #include <linux/module.h> | |
32 | #include <linux/netdevice.h> | |
33 | #include <linux/platform_device.h> | |
34 | ||
35 | #include "ftmac100.h" | |
36 | ||
37 | #define DRV_NAME "ftmac100" | |
38 | #define DRV_VERSION "0.2" | |
39 | ||
40 | #define RX_QUEUE_ENTRIES 128 /* must be power of 2 */ | |
41 | #define TX_QUEUE_ENTRIES 16 /* must be power of 2 */ | |
42 | ||
43 | #define MAX_PKT_SIZE 1518 | |
44 | #define RX_BUF_SIZE 2044 /* must be smaller than 0x7ff */ | |
45 | ||
46 | #if MAX_PKT_SIZE > 0x7ff | |
47 | #error invalid MAX_PKT_SIZE | |
48 | #endif | |
49 | ||
50 | #if RX_BUF_SIZE > 0x7ff || RX_BUF_SIZE > PAGE_SIZE | |
51 | #error invalid RX_BUF_SIZE | |
52 | #endif | |
53 | ||
54 | /****************************************************************************** | |
55 | * private data | |
56 | *****************************************************************************/ | |
57 | struct ftmac100_descs { | |
58 | struct ftmac100_rxdes rxdes[RX_QUEUE_ENTRIES]; | |
59 | struct ftmac100_txdes txdes[TX_QUEUE_ENTRIES]; | |
60 | }; | |
61 | ||
62 | struct ftmac100 { | |
63 | struct resource *res; | |
64 | void __iomem *base; | |
65 | int irq; | |
66 | ||
67 | struct ftmac100_descs *descs; | |
68 | dma_addr_t descs_dma_addr; | |
69 | ||
70 | unsigned int rx_pointer; | |
71 | unsigned int tx_clean_pointer; | |
72 | unsigned int tx_pointer; | |
73 | unsigned int tx_pending; | |
74 | ||
75 | spinlock_t tx_lock; | |
76 | ||
77 | struct net_device *netdev; | |
78 | struct device *dev; | |
79 | struct napi_struct napi; | |
80 | ||
81 | struct mii_if_info mii; | |
82 | }; | |
83 | ||
c05e7ac9 ED |
84 | static int ftmac100_alloc_rx_page(struct ftmac100 *priv, |
85 | struct ftmac100_rxdes *rxdes, gfp_t gfp); | |
8d77c036 PYC |
86 | |
87 | /****************************************************************************** | |
88 | * internal functions (hardware register access) | |
89 | *****************************************************************************/ | |
90 | #define INT_MASK_ALL_ENABLED (FTMAC100_INT_RPKT_FINISH | \ | |
91 | FTMAC100_INT_NORXBUF | \ | |
92 | FTMAC100_INT_XPKT_OK | \ | |
93 | FTMAC100_INT_XPKT_LOST | \ | |
94 | FTMAC100_INT_RPKT_LOST | \ | |
95 | FTMAC100_INT_AHB_ERR | \ | |
96 | FTMAC100_INT_PHYSTS_CHG) | |
97 | ||
98 | #define INT_MASK_ALL_DISABLED 0 | |
99 | ||
100 | static void ftmac100_enable_all_int(struct ftmac100 *priv) | |
101 | { | |
102 | iowrite32(INT_MASK_ALL_ENABLED, priv->base + FTMAC100_OFFSET_IMR); | |
103 | } | |
104 | ||
105 | static void ftmac100_disable_all_int(struct ftmac100 *priv) | |
106 | { | |
107 | iowrite32(INT_MASK_ALL_DISABLED, priv->base + FTMAC100_OFFSET_IMR); | |
108 | } | |
109 | ||
110 | static void ftmac100_set_rx_ring_base(struct ftmac100 *priv, dma_addr_t addr) | |
111 | { | |
112 | iowrite32(addr, priv->base + FTMAC100_OFFSET_RXR_BADR); | |
113 | } | |
114 | ||
115 | static void ftmac100_set_tx_ring_base(struct ftmac100 *priv, dma_addr_t addr) | |
116 | { | |
117 | iowrite32(addr, priv->base + FTMAC100_OFFSET_TXR_BADR); | |
118 | } | |
119 | ||
120 | static void ftmac100_txdma_start_polling(struct ftmac100 *priv) | |
121 | { | |
122 | iowrite32(1, priv->base + FTMAC100_OFFSET_TXPD); | |
123 | } | |
124 | ||
125 | static int ftmac100_reset(struct ftmac100 *priv) | |
126 | { | |
127 | struct net_device *netdev = priv->netdev; | |
128 | int i; | |
129 | ||
130 | /* NOTE: reset clears all registers */ | |
131 | iowrite32(FTMAC100_MACCR_SW_RST, priv->base + FTMAC100_OFFSET_MACCR); | |
132 | ||
133 | for (i = 0; i < 5; i++) { | |
134 | unsigned int maccr; | |
135 | ||
136 | maccr = ioread32(priv->base + FTMAC100_OFFSET_MACCR); | |
137 | if (!(maccr & FTMAC100_MACCR_SW_RST)) { | |
138 | /* | |
139 | * FTMAC100_MACCR_SW_RST cleared does not indicate | |
140 | * that hardware reset completed (what the f*ck). | |
141 | * We still need to wait for a while. | |
142 | */ | |
eee9700c | 143 | udelay(500); |
8d77c036 PYC |
144 | return 0; |
145 | } | |
146 | ||
eee9700c | 147 | udelay(1000); |
8d77c036 PYC |
148 | } |
149 | ||
150 | netdev_err(netdev, "software reset failed\n"); | |
151 | return -EIO; | |
152 | } | |
153 | ||
154 | static void ftmac100_set_mac(struct ftmac100 *priv, const unsigned char *mac) | |
155 | { | |
156 | unsigned int maddr = mac[0] << 8 | mac[1]; | |
157 | unsigned int laddr = mac[2] << 24 | mac[3] << 16 | mac[4] << 8 | mac[5]; | |
158 | ||
159 | iowrite32(maddr, priv->base + FTMAC100_OFFSET_MAC_MADR); | |
160 | iowrite32(laddr, priv->base + FTMAC100_OFFSET_MAC_LADR); | |
161 | } | |
162 | ||
163 | #define MACCR_ENABLE_ALL (FTMAC100_MACCR_XMT_EN | \ | |
164 | FTMAC100_MACCR_RCV_EN | \ | |
165 | FTMAC100_MACCR_XDMA_EN | \ | |
166 | FTMAC100_MACCR_RDMA_EN | \ | |
167 | FTMAC100_MACCR_CRC_APD | \ | |
168 | FTMAC100_MACCR_FULLDUP | \ | |
169 | FTMAC100_MACCR_RX_RUNT | \ | |
170 | FTMAC100_MACCR_RX_BROADPKT) | |
171 | ||
172 | static int ftmac100_start_hw(struct ftmac100 *priv) | |
173 | { | |
174 | struct net_device *netdev = priv->netdev; | |
175 | ||
176 | if (ftmac100_reset(priv)) | |
177 | return -EIO; | |
178 | ||
179 | /* setup ring buffer base registers */ | |
180 | ftmac100_set_rx_ring_base(priv, | |
181 | priv->descs_dma_addr + | |
182 | offsetof(struct ftmac100_descs, rxdes)); | |
183 | ftmac100_set_tx_ring_base(priv, | |
184 | priv->descs_dma_addr + | |
185 | offsetof(struct ftmac100_descs, txdes)); | |
186 | ||
187 | iowrite32(FTMAC100_APTC_RXPOLL_CNT(1), priv->base + FTMAC100_OFFSET_APTC); | |
188 | ||
189 | ftmac100_set_mac(priv, netdev->dev_addr); | |
190 | ||
191 | iowrite32(MACCR_ENABLE_ALL, priv->base + FTMAC100_OFFSET_MACCR); | |
192 | return 0; | |
193 | } | |
194 | ||
195 | static void ftmac100_stop_hw(struct ftmac100 *priv) | |
196 | { | |
197 | iowrite32(0, priv->base + FTMAC100_OFFSET_MACCR); | |
198 | } | |
199 | ||
200 | /****************************************************************************** | |
201 | * internal functions (receive descriptor) | |
202 | *****************************************************************************/ | |
203 | static bool ftmac100_rxdes_first_segment(struct ftmac100_rxdes *rxdes) | |
204 | { | |
205 | return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_FRS); | |
206 | } | |
207 | ||
208 | static bool ftmac100_rxdes_last_segment(struct ftmac100_rxdes *rxdes) | |
209 | { | |
210 | return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_LRS); | |
211 | } | |
212 | ||
213 | static bool ftmac100_rxdes_owned_by_dma(struct ftmac100_rxdes *rxdes) | |
214 | { | |
215 | return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_RXDMA_OWN); | |
216 | } | |
217 | ||
218 | static void ftmac100_rxdes_set_dma_own(struct ftmac100_rxdes *rxdes) | |
219 | { | |
220 | /* clear status bits */ | |
221 | rxdes->rxdes0 = cpu_to_le32(FTMAC100_RXDES0_RXDMA_OWN); | |
222 | } | |
223 | ||
224 | static bool ftmac100_rxdes_rx_error(struct ftmac100_rxdes *rxdes) | |
225 | { | |
226 | return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_RX_ERR); | |
227 | } | |
228 | ||
229 | static bool ftmac100_rxdes_crc_error(struct ftmac100_rxdes *rxdes) | |
230 | { | |
231 | return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_CRC_ERR); | |
232 | } | |
233 | ||
234 | static bool ftmac100_rxdes_frame_too_long(struct ftmac100_rxdes *rxdes) | |
235 | { | |
236 | return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_FTL); | |
237 | } | |
238 | ||
239 | static bool ftmac100_rxdes_runt(struct ftmac100_rxdes *rxdes) | |
240 | { | |
241 | return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_RUNT); | |
242 | } | |
243 | ||
244 | static bool ftmac100_rxdes_odd_nibble(struct ftmac100_rxdes *rxdes) | |
245 | { | |
246 | return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_RX_ODD_NB); | |
247 | } | |
248 | ||
249 | static unsigned int ftmac100_rxdes_frame_length(struct ftmac100_rxdes *rxdes) | |
250 | { | |
251 | return le32_to_cpu(rxdes->rxdes0) & FTMAC100_RXDES0_RFL; | |
252 | } | |
253 | ||
254 | static bool ftmac100_rxdes_multicast(struct ftmac100_rxdes *rxdes) | |
255 | { | |
256 | return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_MULTICAST); | |
257 | } | |
258 | ||
259 | static void ftmac100_rxdes_set_buffer_size(struct ftmac100_rxdes *rxdes, | |
260 | unsigned int size) | |
261 | { | |
262 | rxdes->rxdes1 &= cpu_to_le32(FTMAC100_RXDES1_EDORR); | |
263 | rxdes->rxdes1 |= cpu_to_le32(FTMAC100_RXDES1_RXBUF_SIZE(size)); | |
264 | } | |
265 | ||
266 | static void ftmac100_rxdes_set_end_of_ring(struct ftmac100_rxdes *rxdes) | |
267 | { | |
268 | rxdes->rxdes1 |= cpu_to_le32(FTMAC100_RXDES1_EDORR); | |
269 | } | |
270 | ||
271 | static void ftmac100_rxdes_set_dma_addr(struct ftmac100_rxdes *rxdes, | |
272 | dma_addr_t addr) | |
273 | { | |
274 | rxdes->rxdes2 = cpu_to_le32(addr); | |
275 | } | |
276 | ||
277 | static dma_addr_t ftmac100_rxdes_get_dma_addr(struct ftmac100_rxdes *rxdes) | |
278 | { | |
279 | return le32_to_cpu(rxdes->rxdes2); | |
280 | } | |
281 | ||
282 | /* | |
283 | * rxdes3 is not used by hardware. We use it to keep track of page. | |
284 | * Since hardware does not touch it, we can skip cpu_to_le32()/le32_to_cpu(). | |
285 | */ | |
286 | static void ftmac100_rxdes_set_page(struct ftmac100_rxdes *rxdes, struct page *page) | |
287 | { | |
288 | rxdes->rxdes3 = (unsigned int)page; | |
289 | } | |
290 | ||
291 | static struct page *ftmac100_rxdes_get_page(struct ftmac100_rxdes *rxdes) | |
292 | { | |
293 | return (struct page *)rxdes->rxdes3; | |
294 | } | |
295 | ||
296 | /****************************************************************************** | |
297 | * internal functions (receive) | |
298 | *****************************************************************************/ | |
299 | static int ftmac100_next_rx_pointer(int pointer) | |
300 | { | |
301 | return (pointer + 1) & (RX_QUEUE_ENTRIES - 1); | |
302 | } | |
303 | ||
304 | static void ftmac100_rx_pointer_advance(struct ftmac100 *priv) | |
305 | { | |
306 | priv->rx_pointer = ftmac100_next_rx_pointer(priv->rx_pointer); | |
307 | } | |
308 | ||
309 | static struct ftmac100_rxdes *ftmac100_current_rxdes(struct ftmac100 *priv) | |
310 | { | |
311 | return &priv->descs->rxdes[priv->rx_pointer]; | |
312 | } | |
313 | ||
314 | static struct ftmac100_rxdes * | |
315 | ftmac100_rx_locate_first_segment(struct ftmac100 *priv) | |
316 | { | |
317 | struct ftmac100_rxdes *rxdes = ftmac100_current_rxdes(priv); | |
318 | ||
319 | while (!ftmac100_rxdes_owned_by_dma(rxdes)) { | |
320 | if (ftmac100_rxdes_first_segment(rxdes)) | |
321 | return rxdes; | |
322 | ||
323 | ftmac100_rxdes_set_dma_own(rxdes); | |
324 | ftmac100_rx_pointer_advance(priv); | |
325 | rxdes = ftmac100_current_rxdes(priv); | |
326 | } | |
327 | ||
328 | return NULL; | |
329 | } | |
330 | ||
331 | static bool ftmac100_rx_packet_error(struct ftmac100 *priv, | |
332 | struct ftmac100_rxdes *rxdes) | |
333 | { | |
334 | struct net_device *netdev = priv->netdev; | |
335 | bool error = false; | |
336 | ||
337 | if (unlikely(ftmac100_rxdes_rx_error(rxdes))) { | |
338 | if (net_ratelimit()) | |
339 | netdev_info(netdev, "rx err\n"); | |
340 | ||
341 | netdev->stats.rx_errors++; | |
342 | error = true; | |
343 | } | |
344 | ||
345 | if (unlikely(ftmac100_rxdes_crc_error(rxdes))) { | |
346 | if (net_ratelimit()) | |
347 | netdev_info(netdev, "rx crc err\n"); | |
348 | ||
349 | netdev->stats.rx_crc_errors++; | |
350 | error = true; | |
351 | } | |
352 | ||
353 | if (unlikely(ftmac100_rxdes_frame_too_long(rxdes))) { | |
354 | if (net_ratelimit()) | |
355 | netdev_info(netdev, "rx frame too long\n"); | |
356 | ||
357 | netdev->stats.rx_length_errors++; | |
358 | error = true; | |
359 | } else if (unlikely(ftmac100_rxdes_runt(rxdes))) { | |
360 | if (net_ratelimit()) | |
361 | netdev_info(netdev, "rx runt\n"); | |
362 | ||
363 | netdev->stats.rx_length_errors++; | |
364 | error = true; | |
365 | } else if (unlikely(ftmac100_rxdes_odd_nibble(rxdes))) { | |
366 | if (net_ratelimit()) | |
367 | netdev_info(netdev, "rx odd nibble\n"); | |
368 | ||
369 | netdev->stats.rx_length_errors++; | |
370 | error = true; | |
371 | } | |
372 | ||
373 | return error; | |
374 | } | |
375 | ||
376 | static void ftmac100_rx_drop_packet(struct ftmac100 *priv) | |
377 | { | |
378 | struct net_device *netdev = priv->netdev; | |
379 | struct ftmac100_rxdes *rxdes = ftmac100_current_rxdes(priv); | |
380 | bool done = false; | |
381 | ||
382 | if (net_ratelimit()) | |
383 | netdev_dbg(netdev, "drop packet %p\n", rxdes); | |
384 | ||
385 | do { | |
386 | if (ftmac100_rxdes_last_segment(rxdes)) | |
387 | done = true; | |
388 | ||
389 | ftmac100_rxdes_set_dma_own(rxdes); | |
390 | ftmac100_rx_pointer_advance(priv); | |
391 | rxdes = ftmac100_current_rxdes(priv); | |
392 | } while (!done && !ftmac100_rxdes_owned_by_dma(rxdes)); | |
393 | ||
394 | netdev->stats.rx_dropped++; | |
395 | } | |
396 | ||
397 | static bool ftmac100_rx_packet(struct ftmac100 *priv, int *processed) | |
398 | { | |
399 | struct net_device *netdev = priv->netdev; | |
400 | struct ftmac100_rxdes *rxdes; | |
401 | struct sk_buff *skb; | |
402 | struct page *page; | |
403 | dma_addr_t map; | |
404 | int length; | |
405 | ||
406 | rxdes = ftmac100_rx_locate_first_segment(priv); | |
407 | if (!rxdes) | |
408 | return false; | |
409 | ||
410 | if (unlikely(ftmac100_rx_packet_error(priv, rxdes))) { | |
411 | ftmac100_rx_drop_packet(priv); | |
412 | return true; | |
413 | } | |
414 | ||
415 | /* | |
416 | * It is impossible to get multi-segment packets | |
417 | * because we always provide big enough receive buffers. | |
418 | */ | |
419 | if (unlikely(!ftmac100_rxdes_last_segment(rxdes))) | |
420 | BUG(); | |
421 | ||
422 | /* start processing */ | |
423 | skb = netdev_alloc_skb_ip_align(netdev, 128); | |
424 | if (unlikely(!skb)) { | |
425 | if (net_ratelimit()) | |
426 | netdev_err(netdev, "rx skb alloc failed\n"); | |
427 | ||
428 | ftmac100_rx_drop_packet(priv); | |
429 | return true; | |
430 | } | |
431 | ||
432 | if (unlikely(ftmac100_rxdes_multicast(rxdes))) | |
433 | netdev->stats.multicast++; | |
434 | ||
435 | map = ftmac100_rxdes_get_dma_addr(rxdes); | |
436 | dma_unmap_page(priv->dev, map, RX_BUF_SIZE, DMA_FROM_DEVICE); | |
437 | ||
438 | length = ftmac100_rxdes_frame_length(rxdes); | |
439 | page = ftmac100_rxdes_get_page(rxdes); | |
440 | skb_fill_page_desc(skb, 0, page, 0, length); | |
441 | skb->len += length; | |
442 | skb->data_len += length; | |
96cd8951 | 443 | |
6ecd09dd | 444 | if (length > 128) { |
96cd8951 | 445 | skb->truesize += PAGE_SIZE; |
6ecd09dd ED |
446 | /* We pull the minimum amount into linear part */ |
447 | __pskb_pull_tail(skb, ETH_HLEN); | |
448 | } else { | |
449 | /* Small frames are copied into linear part to free one page */ | |
450 | __pskb_pull_tail(skb, length); | |
451 | } | |
c05e7ac9 | 452 | ftmac100_alloc_rx_page(priv, rxdes, GFP_ATOMIC); |
8d77c036 PYC |
453 | |
454 | ftmac100_rx_pointer_advance(priv); | |
455 | ||
456 | skb->protocol = eth_type_trans(skb, netdev); | |
457 | ||
458 | netdev->stats.rx_packets++; | |
459 | netdev->stats.rx_bytes += skb->len; | |
460 | ||
461 | /* push packet to protocol stack */ | |
462 | netif_receive_skb(skb); | |
463 | ||
464 | (*processed)++; | |
465 | return true; | |
466 | } | |
467 | ||
468 | /****************************************************************************** | |
469 | * internal functions (transmit descriptor) | |
470 | *****************************************************************************/ | |
471 | static void ftmac100_txdes_reset(struct ftmac100_txdes *txdes) | |
472 | { | |
473 | /* clear all except end of ring bit */ | |
474 | txdes->txdes0 = 0; | |
475 | txdes->txdes1 &= cpu_to_le32(FTMAC100_TXDES1_EDOTR); | |
476 | txdes->txdes2 = 0; | |
477 | txdes->txdes3 = 0; | |
478 | } | |
479 | ||
480 | static bool ftmac100_txdes_owned_by_dma(struct ftmac100_txdes *txdes) | |
481 | { | |
482 | return txdes->txdes0 & cpu_to_le32(FTMAC100_TXDES0_TXDMA_OWN); | |
483 | } | |
484 | ||
485 | static void ftmac100_txdes_set_dma_own(struct ftmac100_txdes *txdes) | |
486 | { | |
487 | /* | |
488 | * Make sure dma own bit will not be set before any other | |
489 | * descriptor fields. | |
490 | */ | |
491 | wmb(); | |
492 | txdes->txdes0 |= cpu_to_le32(FTMAC100_TXDES0_TXDMA_OWN); | |
493 | } | |
494 | ||
495 | static bool ftmac100_txdes_excessive_collision(struct ftmac100_txdes *txdes) | |
496 | { | |
497 | return txdes->txdes0 & cpu_to_le32(FTMAC100_TXDES0_TXPKT_EXSCOL); | |
498 | } | |
499 | ||
500 | static bool ftmac100_txdes_late_collision(struct ftmac100_txdes *txdes) | |
501 | { | |
502 | return txdes->txdes0 & cpu_to_le32(FTMAC100_TXDES0_TXPKT_LATECOL); | |
503 | } | |
504 | ||
505 | static void ftmac100_txdes_set_end_of_ring(struct ftmac100_txdes *txdes) | |
506 | { | |
507 | txdes->txdes1 |= cpu_to_le32(FTMAC100_TXDES1_EDOTR); | |
508 | } | |
509 | ||
510 | static void ftmac100_txdes_set_first_segment(struct ftmac100_txdes *txdes) | |
511 | { | |
512 | txdes->txdes1 |= cpu_to_le32(FTMAC100_TXDES1_FTS); | |
513 | } | |
514 | ||
515 | static void ftmac100_txdes_set_last_segment(struct ftmac100_txdes *txdes) | |
516 | { | |
517 | txdes->txdes1 |= cpu_to_le32(FTMAC100_TXDES1_LTS); | |
518 | } | |
519 | ||
520 | static void ftmac100_txdes_set_txint(struct ftmac100_txdes *txdes) | |
521 | { | |
522 | txdes->txdes1 |= cpu_to_le32(FTMAC100_TXDES1_TXIC); | |
523 | } | |
524 | ||
525 | static void ftmac100_txdes_set_buffer_size(struct ftmac100_txdes *txdes, | |
526 | unsigned int len) | |
527 | { | |
528 | txdes->txdes1 |= cpu_to_le32(FTMAC100_TXDES1_TXBUF_SIZE(len)); | |
529 | } | |
530 | ||
531 | static void ftmac100_txdes_set_dma_addr(struct ftmac100_txdes *txdes, | |
532 | dma_addr_t addr) | |
533 | { | |
534 | txdes->txdes2 = cpu_to_le32(addr); | |
535 | } | |
536 | ||
537 | static dma_addr_t ftmac100_txdes_get_dma_addr(struct ftmac100_txdes *txdes) | |
538 | { | |
539 | return le32_to_cpu(txdes->txdes2); | |
540 | } | |
541 | ||
542 | /* | |
543 | * txdes3 is not used by hardware. We use it to keep track of socket buffer. | |
544 | * Since hardware does not touch it, we can skip cpu_to_le32()/le32_to_cpu(). | |
545 | */ | |
546 | static void ftmac100_txdes_set_skb(struct ftmac100_txdes *txdes, struct sk_buff *skb) | |
547 | { | |
548 | txdes->txdes3 = (unsigned int)skb; | |
549 | } | |
550 | ||
551 | static struct sk_buff *ftmac100_txdes_get_skb(struct ftmac100_txdes *txdes) | |
552 | { | |
553 | return (struct sk_buff *)txdes->txdes3; | |
554 | } | |
555 | ||
556 | /****************************************************************************** | |
557 | * internal functions (transmit) | |
558 | *****************************************************************************/ | |
559 | static int ftmac100_next_tx_pointer(int pointer) | |
560 | { | |
561 | return (pointer + 1) & (TX_QUEUE_ENTRIES - 1); | |
562 | } | |
563 | ||
564 | static void ftmac100_tx_pointer_advance(struct ftmac100 *priv) | |
565 | { | |
566 | priv->tx_pointer = ftmac100_next_tx_pointer(priv->tx_pointer); | |
567 | } | |
568 | ||
569 | static void ftmac100_tx_clean_pointer_advance(struct ftmac100 *priv) | |
570 | { | |
571 | priv->tx_clean_pointer = ftmac100_next_tx_pointer(priv->tx_clean_pointer); | |
572 | } | |
573 | ||
574 | static struct ftmac100_txdes *ftmac100_current_txdes(struct ftmac100 *priv) | |
575 | { | |
576 | return &priv->descs->txdes[priv->tx_pointer]; | |
577 | } | |
578 | ||
579 | static struct ftmac100_txdes *ftmac100_current_clean_txdes(struct ftmac100 *priv) | |
580 | { | |
581 | return &priv->descs->txdes[priv->tx_clean_pointer]; | |
582 | } | |
583 | ||
584 | static bool ftmac100_tx_complete_packet(struct ftmac100 *priv) | |
585 | { | |
586 | struct net_device *netdev = priv->netdev; | |
587 | struct ftmac100_txdes *txdes; | |
588 | struct sk_buff *skb; | |
589 | dma_addr_t map; | |
590 | ||
591 | if (priv->tx_pending == 0) | |
592 | return false; | |
593 | ||
594 | txdes = ftmac100_current_clean_txdes(priv); | |
595 | ||
596 | if (ftmac100_txdes_owned_by_dma(txdes)) | |
597 | return false; | |
598 | ||
599 | skb = ftmac100_txdes_get_skb(txdes); | |
600 | map = ftmac100_txdes_get_dma_addr(txdes); | |
601 | ||
602 | if (unlikely(ftmac100_txdes_excessive_collision(txdes) || | |
603 | ftmac100_txdes_late_collision(txdes))) { | |
604 | /* | |
605 | * packet transmitted to ethernet lost due to late collision | |
606 | * or excessive collision | |
607 | */ | |
608 | netdev->stats.tx_aborted_errors++; | |
609 | } else { | |
610 | netdev->stats.tx_packets++; | |
611 | netdev->stats.tx_bytes += skb->len; | |
612 | } | |
613 | ||
614 | dma_unmap_single(priv->dev, map, skb_headlen(skb), DMA_TO_DEVICE); | |
615 | dev_kfree_skb(skb); | |
616 | ||
617 | ftmac100_txdes_reset(txdes); | |
618 | ||
619 | ftmac100_tx_clean_pointer_advance(priv); | |
620 | ||
621 | spin_lock(&priv->tx_lock); | |
622 | priv->tx_pending--; | |
623 | spin_unlock(&priv->tx_lock); | |
624 | netif_wake_queue(netdev); | |
625 | ||
626 | return true; | |
627 | } | |
628 | ||
629 | static void ftmac100_tx_complete(struct ftmac100 *priv) | |
630 | { | |
631 | while (ftmac100_tx_complete_packet(priv)) | |
632 | ; | |
633 | } | |
634 | ||
635 | static int ftmac100_xmit(struct ftmac100 *priv, struct sk_buff *skb, | |
636 | dma_addr_t map) | |
637 | { | |
638 | struct net_device *netdev = priv->netdev; | |
639 | struct ftmac100_txdes *txdes; | |
640 | unsigned int len = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len; | |
641 | ||
642 | txdes = ftmac100_current_txdes(priv); | |
643 | ftmac100_tx_pointer_advance(priv); | |
644 | ||
645 | /* setup TX descriptor */ | |
646 | ftmac100_txdes_set_skb(txdes, skb); | |
647 | ftmac100_txdes_set_dma_addr(txdes, map); | |
648 | ||
649 | ftmac100_txdes_set_first_segment(txdes); | |
650 | ftmac100_txdes_set_last_segment(txdes); | |
651 | ftmac100_txdes_set_txint(txdes); | |
652 | ftmac100_txdes_set_buffer_size(txdes, len); | |
653 | ||
654 | spin_lock(&priv->tx_lock); | |
655 | priv->tx_pending++; | |
656 | if (priv->tx_pending == TX_QUEUE_ENTRIES) | |
657 | netif_stop_queue(netdev); | |
658 | ||
659 | /* start transmit */ | |
660 | ftmac100_txdes_set_dma_own(txdes); | |
661 | spin_unlock(&priv->tx_lock); | |
662 | ||
663 | ftmac100_txdma_start_polling(priv); | |
664 | return NETDEV_TX_OK; | |
665 | } | |
666 | ||
667 | /****************************************************************************** | |
668 | * internal functions (buffer) | |
669 | *****************************************************************************/ | |
c05e7ac9 ED |
670 | static int ftmac100_alloc_rx_page(struct ftmac100 *priv, |
671 | struct ftmac100_rxdes *rxdes, gfp_t gfp) | |
8d77c036 PYC |
672 | { |
673 | struct net_device *netdev = priv->netdev; | |
674 | struct page *page; | |
675 | dma_addr_t map; | |
676 | ||
c05e7ac9 | 677 | page = alloc_page(gfp); |
8d77c036 PYC |
678 | if (!page) { |
679 | if (net_ratelimit()) | |
680 | netdev_err(netdev, "failed to allocate rx page\n"); | |
681 | return -ENOMEM; | |
682 | } | |
683 | ||
684 | map = dma_map_page(priv->dev, page, 0, RX_BUF_SIZE, DMA_FROM_DEVICE); | |
685 | if (unlikely(dma_mapping_error(priv->dev, map))) { | |
686 | if (net_ratelimit()) | |
687 | netdev_err(netdev, "failed to map rx page\n"); | |
688 | __free_page(page); | |
689 | return -ENOMEM; | |
690 | } | |
691 | ||
692 | ftmac100_rxdes_set_page(rxdes, page); | |
693 | ftmac100_rxdes_set_dma_addr(rxdes, map); | |
694 | ftmac100_rxdes_set_buffer_size(rxdes, RX_BUF_SIZE); | |
695 | ftmac100_rxdes_set_dma_own(rxdes); | |
696 | return 0; | |
697 | } | |
698 | ||
699 | static void ftmac100_free_buffers(struct ftmac100 *priv) | |
700 | { | |
701 | int i; | |
702 | ||
703 | for (i = 0; i < RX_QUEUE_ENTRIES; i++) { | |
704 | struct ftmac100_rxdes *rxdes = &priv->descs->rxdes[i]; | |
705 | struct page *page = ftmac100_rxdes_get_page(rxdes); | |
706 | dma_addr_t map = ftmac100_rxdes_get_dma_addr(rxdes); | |
707 | ||
708 | if (!page) | |
709 | continue; | |
710 | ||
711 | dma_unmap_page(priv->dev, map, RX_BUF_SIZE, DMA_FROM_DEVICE); | |
712 | __free_page(page); | |
713 | } | |
714 | ||
715 | for (i = 0; i < TX_QUEUE_ENTRIES; i++) { | |
716 | struct ftmac100_txdes *txdes = &priv->descs->txdes[i]; | |
717 | struct sk_buff *skb = ftmac100_txdes_get_skb(txdes); | |
718 | dma_addr_t map = ftmac100_txdes_get_dma_addr(txdes); | |
719 | ||
720 | if (!skb) | |
721 | continue; | |
722 | ||
723 | dma_unmap_single(priv->dev, map, skb_headlen(skb), DMA_TO_DEVICE); | |
724 | dev_kfree_skb(skb); | |
725 | } | |
726 | ||
727 | dma_free_coherent(priv->dev, sizeof(struct ftmac100_descs), | |
728 | priv->descs, priv->descs_dma_addr); | |
729 | } | |
730 | ||
731 | static int ftmac100_alloc_buffers(struct ftmac100 *priv) | |
732 | { | |
733 | int i; | |
734 | ||
ede23fa8 JP |
735 | priv->descs = dma_zalloc_coherent(priv->dev, |
736 | sizeof(struct ftmac100_descs), | |
737 | &priv->descs_dma_addr, | |
738 | GFP_KERNEL); | |
8d77c036 PYC |
739 | if (!priv->descs) |
740 | return -ENOMEM; | |
741 | ||
8d77c036 PYC |
742 | /* initialize RX ring */ |
743 | ftmac100_rxdes_set_end_of_ring(&priv->descs->rxdes[RX_QUEUE_ENTRIES - 1]); | |
744 | ||
745 | for (i = 0; i < RX_QUEUE_ENTRIES; i++) { | |
746 | struct ftmac100_rxdes *rxdes = &priv->descs->rxdes[i]; | |
747 | ||
c05e7ac9 | 748 | if (ftmac100_alloc_rx_page(priv, rxdes, GFP_KERNEL)) |
8d77c036 PYC |
749 | goto err; |
750 | } | |
751 | ||
752 | /* initialize TX ring */ | |
753 | ftmac100_txdes_set_end_of_ring(&priv->descs->txdes[TX_QUEUE_ENTRIES - 1]); | |
754 | return 0; | |
755 | ||
756 | err: | |
757 | ftmac100_free_buffers(priv); | |
758 | return -ENOMEM; | |
759 | } | |
760 | ||
761 | /****************************************************************************** | |
762 | * struct mii_if_info functions | |
763 | *****************************************************************************/ | |
764 | static int ftmac100_mdio_read(struct net_device *netdev, int phy_id, int reg) | |
765 | { | |
766 | struct ftmac100 *priv = netdev_priv(netdev); | |
767 | unsigned int phycr; | |
768 | int i; | |
769 | ||
770 | phycr = FTMAC100_PHYCR_PHYAD(phy_id) | | |
771 | FTMAC100_PHYCR_REGAD(reg) | | |
772 | FTMAC100_PHYCR_MIIRD; | |
773 | ||
774 | iowrite32(phycr, priv->base + FTMAC100_OFFSET_PHYCR); | |
775 | ||
776 | for (i = 0; i < 10; i++) { | |
777 | phycr = ioread32(priv->base + FTMAC100_OFFSET_PHYCR); | |
778 | ||
779 | if ((phycr & FTMAC100_PHYCR_MIIRD) == 0) | |
780 | return phycr & FTMAC100_PHYCR_MIIRDATA; | |
781 | ||
eee9700c | 782 | udelay(100); |
8d77c036 PYC |
783 | } |
784 | ||
785 | netdev_err(netdev, "mdio read timed out\n"); | |
786 | return 0; | |
787 | } | |
788 | ||
789 | static void ftmac100_mdio_write(struct net_device *netdev, int phy_id, int reg, | |
790 | int data) | |
791 | { | |
792 | struct ftmac100 *priv = netdev_priv(netdev); | |
793 | unsigned int phycr; | |
794 | int i; | |
795 | ||
796 | phycr = FTMAC100_PHYCR_PHYAD(phy_id) | | |
797 | FTMAC100_PHYCR_REGAD(reg) | | |
798 | FTMAC100_PHYCR_MIIWR; | |
799 | ||
800 | data = FTMAC100_PHYWDATA_MIIWDATA(data); | |
801 | ||
802 | iowrite32(data, priv->base + FTMAC100_OFFSET_PHYWDATA); | |
803 | iowrite32(phycr, priv->base + FTMAC100_OFFSET_PHYCR); | |
804 | ||
805 | for (i = 0; i < 10; i++) { | |
806 | phycr = ioread32(priv->base + FTMAC100_OFFSET_PHYCR); | |
807 | ||
808 | if ((phycr & FTMAC100_PHYCR_MIIWR) == 0) | |
809 | return; | |
810 | ||
eee9700c | 811 | udelay(100); |
8d77c036 PYC |
812 | } |
813 | ||
814 | netdev_err(netdev, "mdio write timed out\n"); | |
815 | } | |
816 | ||
817 | /****************************************************************************** | |
818 | * struct ethtool_ops functions | |
819 | *****************************************************************************/ | |
820 | static void ftmac100_get_drvinfo(struct net_device *netdev, | |
821 | struct ethtool_drvinfo *info) | |
822 | { | |
7826d43f JP |
823 | strlcpy(info->driver, DRV_NAME, sizeof(info->driver)); |
824 | strlcpy(info->version, DRV_VERSION, sizeof(info->version)); | |
825 | strlcpy(info->bus_info, dev_name(&netdev->dev), sizeof(info->bus_info)); | |
8d77c036 PYC |
826 | } |
827 | ||
828 | static int ftmac100_get_settings(struct net_device *netdev, struct ethtool_cmd *cmd) | |
829 | { | |
830 | struct ftmac100 *priv = netdev_priv(netdev); | |
831 | return mii_ethtool_gset(&priv->mii, cmd); | |
832 | } | |
833 | ||
834 | static int ftmac100_set_settings(struct net_device *netdev, struct ethtool_cmd *cmd) | |
835 | { | |
836 | struct ftmac100 *priv = netdev_priv(netdev); | |
837 | return mii_ethtool_sset(&priv->mii, cmd); | |
838 | } | |
839 | ||
840 | static int ftmac100_nway_reset(struct net_device *netdev) | |
841 | { | |
842 | struct ftmac100 *priv = netdev_priv(netdev); | |
843 | return mii_nway_restart(&priv->mii); | |
844 | } | |
845 | ||
846 | static u32 ftmac100_get_link(struct net_device *netdev) | |
847 | { | |
848 | struct ftmac100 *priv = netdev_priv(netdev); | |
849 | return mii_link_ok(&priv->mii); | |
850 | } | |
851 | ||
852 | static const struct ethtool_ops ftmac100_ethtool_ops = { | |
853 | .set_settings = ftmac100_set_settings, | |
854 | .get_settings = ftmac100_get_settings, | |
855 | .get_drvinfo = ftmac100_get_drvinfo, | |
856 | .nway_reset = ftmac100_nway_reset, | |
857 | .get_link = ftmac100_get_link, | |
858 | }; | |
859 | ||
860 | /****************************************************************************** | |
861 | * interrupt handler | |
862 | *****************************************************************************/ | |
863 | static irqreturn_t ftmac100_interrupt(int irq, void *dev_id) | |
864 | { | |
865 | struct net_device *netdev = dev_id; | |
866 | struct ftmac100 *priv = netdev_priv(netdev); | |
867 | ||
868 | if (likely(netif_running(netdev))) { | |
869 | /* Disable interrupts for polling */ | |
870 | ftmac100_disable_all_int(priv); | |
871 | napi_schedule(&priv->napi); | |
872 | } | |
873 | ||
874 | return IRQ_HANDLED; | |
875 | } | |
876 | ||
877 | /****************************************************************************** | |
878 | * struct napi_struct functions | |
879 | *****************************************************************************/ | |
880 | static int ftmac100_poll(struct napi_struct *napi, int budget) | |
881 | { | |
882 | struct ftmac100 *priv = container_of(napi, struct ftmac100, napi); | |
883 | struct net_device *netdev = priv->netdev; | |
884 | unsigned int status; | |
885 | bool completed = true; | |
886 | int rx = 0; | |
887 | ||
888 | status = ioread32(priv->base + FTMAC100_OFFSET_ISR); | |
889 | ||
890 | if (status & (FTMAC100_INT_RPKT_FINISH | FTMAC100_INT_NORXBUF)) { | |
891 | /* | |
892 | * FTMAC100_INT_RPKT_FINISH: | |
893 | * RX DMA has received packets into RX buffer successfully | |
894 | * | |
895 | * FTMAC100_INT_NORXBUF: | |
896 | * RX buffer unavailable | |
897 | */ | |
898 | bool retry; | |
899 | ||
900 | do { | |
901 | retry = ftmac100_rx_packet(priv, &rx); | |
902 | } while (retry && rx < budget); | |
903 | ||
904 | if (retry && rx == budget) | |
905 | completed = false; | |
906 | } | |
907 | ||
908 | if (status & (FTMAC100_INT_XPKT_OK | FTMAC100_INT_XPKT_LOST)) { | |
909 | /* | |
910 | * FTMAC100_INT_XPKT_OK: | |
911 | * packet transmitted to ethernet successfully | |
912 | * | |
913 | * FTMAC100_INT_XPKT_LOST: | |
914 | * packet transmitted to ethernet lost due to late | |
915 | * collision or excessive collision | |
916 | */ | |
917 | ftmac100_tx_complete(priv); | |
918 | } | |
919 | ||
920 | if (status & (FTMAC100_INT_NORXBUF | FTMAC100_INT_RPKT_LOST | | |
921 | FTMAC100_INT_AHB_ERR | FTMAC100_INT_PHYSTS_CHG)) { | |
922 | if (net_ratelimit()) | |
923 | netdev_info(netdev, "[ISR] = 0x%x: %s%s%s%s\n", status, | |
924 | status & FTMAC100_INT_NORXBUF ? "NORXBUF " : "", | |
925 | status & FTMAC100_INT_RPKT_LOST ? "RPKT_LOST " : "", | |
926 | status & FTMAC100_INT_AHB_ERR ? "AHB_ERR " : "", | |
927 | status & FTMAC100_INT_PHYSTS_CHG ? "PHYSTS_CHG" : ""); | |
928 | ||
929 | if (status & FTMAC100_INT_NORXBUF) { | |
930 | /* RX buffer unavailable */ | |
931 | netdev->stats.rx_over_errors++; | |
932 | } | |
933 | ||
934 | if (status & FTMAC100_INT_RPKT_LOST) { | |
935 | /* received packet lost due to RX FIFO full */ | |
936 | netdev->stats.rx_fifo_errors++; | |
937 | } | |
938 | ||
939 | if (status & FTMAC100_INT_PHYSTS_CHG) { | |
940 | /* PHY link status change */ | |
941 | mii_check_link(&priv->mii); | |
942 | } | |
943 | } | |
944 | ||
945 | if (completed) { | |
946 | /* stop polling */ | |
947 | napi_complete(napi); | |
948 | ftmac100_enable_all_int(priv); | |
949 | } | |
950 | ||
951 | return rx; | |
952 | } | |
953 | ||
954 | /****************************************************************************** | |
955 | * struct net_device_ops functions | |
956 | *****************************************************************************/ | |
957 | static int ftmac100_open(struct net_device *netdev) | |
958 | { | |
959 | struct ftmac100 *priv = netdev_priv(netdev); | |
960 | int err; | |
961 | ||
962 | err = ftmac100_alloc_buffers(priv); | |
963 | if (err) { | |
964 | netdev_err(netdev, "failed to allocate buffers\n"); | |
965 | goto err_alloc; | |
966 | } | |
967 | ||
968 | err = request_irq(priv->irq, ftmac100_interrupt, 0, netdev->name, netdev); | |
969 | if (err) { | |
970 | netdev_err(netdev, "failed to request irq %d\n", priv->irq); | |
971 | goto err_irq; | |
972 | } | |
973 | ||
974 | priv->rx_pointer = 0; | |
975 | priv->tx_clean_pointer = 0; | |
976 | priv->tx_pointer = 0; | |
977 | priv->tx_pending = 0; | |
978 | ||
979 | err = ftmac100_start_hw(priv); | |
980 | if (err) | |
981 | goto err_hw; | |
982 | ||
983 | napi_enable(&priv->napi); | |
984 | netif_start_queue(netdev); | |
985 | ||
986 | ftmac100_enable_all_int(priv); | |
987 | ||
988 | return 0; | |
989 | ||
990 | err_hw: | |
991 | free_irq(priv->irq, netdev); | |
992 | err_irq: | |
993 | ftmac100_free_buffers(priv); | |
994 | err_alloc: | |
995 | return err; | |
996 | } | |
997 | ||
998 | static int ftmac100_stop(struct net_device *netdev) | |
999 | { | |
1000 | struct ftmac100 *priv = netdev_priv(netdev); | |
1001 | ||
1002 | ftmac100_disable_all_int(priv); | |
1003 | netif_stop_queue(netdev); | |
1004 | napi_disable(&priv->napi); | |
1005 | ftmac100_stop_hw(priv); | |
1006 | free_irq(priv->irq, netdev); | |
1007 | ftmac100_free_buffers(priv); | |
1008 | ||
1009 | return 0; | |
1010 | } | |
1011 | ||
1012 | static int ftmac100_hard_start_xmit(struct sk_buff *skb, struct net_device *netdev) | |
1013 | { | |
1014 | struct ftmac100 *priv = netdev_priv(netdev); | |
1015 | dma_addr_t map; | |
1016 | ||
1017 | if (unlikely(skb->len > MAX_PKT_SIZE)) { | |
1018 | if (net_ratelimit()) | |
1019 | netdev_dbg(netdev, "tx packet too big\n"); | |
1020 | ||
1021 | netdev->stats.tx_dropped++; | |
1022 | dev_kfree_skb(skb); | |
1023 | return NETDEV_TX_OK; | |
1024 | } | |
1025 | ||
1026 | map = dma_map_single(priv->dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); | |
1027 | if (unlikely(dma_mapping_error(priv->dev, map))) { | |
1028 | /* drop packet */ | |
1029 | if (net_ratelimit()) | |
1030 | netdev_err(netdev, "map socket buffer failed\n"); | |
1031 | ||
1032 | netdev->stats.tx_dropped++; | |
1033 | dev_kfree_skb(skb); | |
1034 | return NETDEV_TX_OK; | |
1035 | } | |
1036 | ||
1037 | return ftmac100_xmit(priv, skb, map); | |
1038 | } | |
1039 | ||
1040 | /* optional */ | |
1041 | static int ftmac100_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) | |
1042 | { | |
1043 | struct ftmac100 *priv = netdev_priv(netdev); | |
1044 | struct mii_ioctl_data *data = if_mii(ifr); | |
1045 | ||
1046 | return generic_mii_ioctl(&priv->mii, data, cmd, NULL); | |
1047 | } | |
1048 | ||
1049 | static const struct net_device_ops ftmac100_netdev_ops = { | |
1050 | .ndo_open = ftmac100_open, | |
1051 | .ndo_stop = ftmac100_stop, | |
1052 | .ndo_start_xmit = ftmac100_hard_start_xmit, | |
1053 | .ndo_set_mac_address = eth_mac_addr, | |
1054 | .ndo_validate_addr = eth_validate_addr, | |
1055 | .ndo_do_ioctl = ftmac100_do_ioctl, | |
1056 | }; | |
1057 | ||
1058 | /****************************************************************************** | |
1059 | * struct platform_driver functions | |
1060 | *****************************************************************************/ | |
1061 | static int ftmac100_probe(struct platform_device *pdev) | |
1062 | { | |
1063 | struct resource *res; | |
1064 | int irq; | |
1065 | struct net_device *netdev; | |
1066 | struct ftmac100 *priv; | |
1067 | int err; | |
1068 | ||
1069 | if (!pdev) | |
1070 | return -ENODEV; | |
1071 | ||
1072 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1073 | if (!res) | |
1074 | return -ENXIO; | |
1075 | ||
1076 | irq = platform_get_irq(pdev, 0); | |
1077 | if (irq < 0) | |
1078 | return irq; | |
1079 | ||
1080 | /* setup net_device */ | |
1081 | netdev = alloc_etherdev(sizeof(*priv)); | |
1082 | if (!netdev) { | |
1083 | err = -ENOMEM; | |
1084 | goto err_alloc_etherdev; | |
1085 | } | |
1086 | ||
1087 | SET_NETDEV_DEV(netdev, &pdev->dev); | |
7ad24ea4 | 1088 | netdev->ethtool_ops = &ftmac100_ethtool_ops; |
8d77c036 PYC |
1089 | netdev->netdev_ops = &ftmac100_netdev_ops; |
1090 | ||
1091 | platform_set_drvdata(pdev, netdev); | |
1092 | ||
1093 | /* setup private data */ | |
1094 | priv = netdev_priv(netdev); | |
1095 | priv->netdev = netdev; | |
1096 | priv->dev = &pdev->dev; | |
1097 | ||
1098 | spin_lock_init(&priv->tx_lock); | |
1099 | ||
1100 | /* initialize NAPI */ | |
1101 | netif_napi_add(netdev, &priv->napi, ftmac100_poll, 64); | |
1102 | ||
1103 | /* map io memory */ | |
1104 | priv->res = request_mem_region(res->start, resource_size(res), | |
1105 | dev_name(&pdev->dev)); | |
1106 | if (!priv->res) { | |
1107 | dev_err(&pdev->dev, "Could not reserve memory region\n"); | |
1108 | err = -ENOMEM; | |
1109 | goto err_req_mem; | |
1110 | } | |
1111 | ||
93d03203 | 1112 | priv->base = ioremap(res->start, resource_size(res)); |
8d77c036 PYC |
1113 | if (!priv->base) { |
1114 | dev_err(&pdev->dev, "Failed to ioremap ethernet registers\n"); | |
1115 | err = -EIO; | |
1116 | goto err_ioremap; | |
1117 | } | |
1118 | ||
1119 | priv->irq = irq; | |
1120 | ||
1121 | /* initialize struct mii_if_info */ | |
1122 | priv->mii.phy_id = 0; | |
1123 | priv->mii.phy_id_mask = 0x1f; | |
1124 | priv->mii.reg_num_mask = 0x1f; | |
1125 | priv->mii.dev = netdev; | |
1126 | priv->mii.mdio_read = ftmac100_mdio_read; | |
1127 | priv->mii.mdio_write = ftmac100_mdio_write; | |
1128 | ||
1129 | /* register network device */ | |
1130 | err = register_netdev(netdev); | |
1131 | if (err) { | |
1132 | dev_err(&pdev->dev, "Failed to register netdev\n"); | |
1133 | goto err_register_netdev; | |
1134 | } | |
1135 | ||
1136 | netdev_info(netdev, "irq %d, mapped at %p\n", priv->irq, priv->base); | |
1137 | ||
1138 | if (!is_valid_ether_addr(netdev->dev_addr)) { | |
f2cedb63 | 1139 | eth_hw_addr_random(netdev); |
8d77c036 PYC |
1140 | netdev_info(netdev, "generated random MAC address %pM\n", |
1141 | netdev->dev_addr); | |
1142 | } | |
1143 | ||
1144 | return 0; | |
1145 | ||
1146 | err_register_netdev: | |
1147 | iounmap(priv->base); | |
1148 | err_ioremap: | |
1149 | release_resource(priv->res); | |
1150 | err_req_mem: | |
1151 | netif_napi_del(&priv->napi); | |
8d77c036 PYC |
1152 | free_netdev(netdev); |
1153 | err_alloc_etherdev: | |
1154 | return err; | |
1155 | } | |
1156 | ||
1157 | static int __exit ftmac100_remove(struct platform_device *pdev) | |
1158 | { | |
1159 | struct net_device *netdev; | |
1160 | struct ftmac100 *priv; | |
1161 | ||
1162 | netdev = platform_get_drvdata(pdev); | |
1163 | priv = netdev_priv(netdev); | |
1164 | ||
1165 | unregister_netdev(netdev); | |
1166 | ||
1167 | iounmap(priv->base); | |
1168 | release_resource(priv->res); | |
1169 | ||
1170 | netif_napi_del(&priv->napi); | |
8d77c036 PYC |
1171 | free_netdev(netdev); |
1172 | return 0; | |
1173 | } | |
1174 | ||
1175 | static struct platform_driver ftmac100_driver = { | |
1176 | .probe = ftmac100_probe, | |
1177 | .remove = __exit_p(ftmac100_remove), | |
1178 | .driver = { | |
1179 | .name = DRV_NAME, | |
8d77c036 PYC |
1180 | }, |
1181 | }; | |
1182 | ||
1183 | /****************************************************************************** | |
1184 | * initialization / finalization | |
1185 | *****************************************************************************/ | |
1186 | static int __init ftmac100_init(void) | |
1187 | { | |
1188 | pr_info("Loading version " DRV_VERSION " ...\n"); | |
1189 | return platform_driver_register(&ftmac100_driver); | |
1190 | } | |
1191 | ||
1192 | static void __exit ftmac100_exit(void) | |
1193 | { | |
1194 | platform_driver_unregister(&ftmac100_driver); | |
1195 | } | |
1196 | ||
1197 | module_init(ftmac100_init); | |
1198 | module_exit(ftmac100_exit); | |
1199 | ||
1200 | MODULE_AUTHOR("Po-Yu Chuang <ratbert@faraday-tech.com>"); | |
1201 | MODULE_DESCRIPTION("FTMAC100 driver"); | |
1202 | MODULE_LICENSE("GPL"); |