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a1702857 TR |
1 | /* |
2 | * linux/drivers/net/ethoc.c | |
3 | * | |
4 | * Copyright (C) 2007-2008 Avionic Design Development GmbH | |
5 | * Copyright (C) 2008-2009 Avionic Design GmbH | |
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 version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | * Written by Thierry Reding <thierry.reding@avionic-design.de> | |
12 | */ | |
13 | ||
14 | #include <linux/etherdevice.h> | |
15 | #include <linux/crc32.h> | |
16 | #include <linux/io.h> | |
17 | #include <linux/mii.h> | |
18 | #include <linux/phy.h> | |
19 | #include <linux/platform_device.h> | |
d43c36dc | 20 | #include <linux/sched.h> |
5a0e3ad6 | 21 | #include <linux/slab.h> |
a1702857 TR |
22 | #include <net/ethoc.h> |
23 | ||
0baa080c TC |
24 | static int buffer_size = 0x8000; /* 32 KBytes */ |
25 | module_param(buffer_size, int, 0); | |
26 | MODULE_PARM_DESC(buffer_size, "DMA buffer allocation size"); | |
27 | ||
a1702857 TR |
28 | /* register offsets */ |
29 | #define MODER 0x00 | |
30 | #define INT_SOURCE 0x04 | |
31 | #define INT_MASK 0x08 | |
32 | #define IPGT 0x0c | |
33 | #define IPGR1 0x10 | |
34 | #define IPGR2 0x14 | |
35 | #define PACKETLEN 0x18 | |
36 | #define COLLCONF 0x1c | |
37 | #define TX_BD_NUM 0x20 | |
38 | #define CTRLMODER 0x24 | |
39 | #define MIIMODER 0x28 | |
40 | #define MIICOMMAND 0x2c | |
41 | #define MIIADDRESS 0x30 | |
42 | #define MIITX_DATA 0x34 | |
43 | #define MIIRX_DATA 0x38 | |
44 | #define MIISTATUS 0x3c | |
45 | #define MAC_ADDR0 0x40 | |
46 | #define MAC_ADDR1 0x44 | |
47 | #define ETH_HASH0 0x48 | |
48 | #define ETH_HASH1 0x4c | |
49 | #define ETH_TXCTRL 0x50 | |
50 | ||
51 | /* mode register */ | |
52 | #define MODER_RXEN (1 << 0) /* receive enable */ | |
53 | #define MODER_TXEN (1 << 1) /* transmit enable */ | |
54 | #define MODER_NOPRE (1 << 2) /* no preamble */ | |
55 | #define MODER_BRO (1 << 3) /* broadcast address */ | |
56 | #define MODER_IAM (1 << 4) /* individual address mode */ | |
57 | #define MODER_PRO (1 << 5) /* promiscuous mode */ | |
58 | #define MODER_IFG (1 << 6) /* interframe gap for incoming frames */ | |
59 | #define MODER_LOOP (1 << 7) /* loopback */ | |
60 | #define MODER_NBO (1 << 8) /* no back-off */ | |
61 | #define MODER_EDE (1 << 9) /* excess defer enable */ | |
62 | #define MODER_FULLD (1 << 10) /* full duplex */ | |
63 | #define MODER_RESET (1 << 11) /* FIXME: reset (undocumented) */ | |
64 | #define MODER_DCRC (1 << 12) /* delayed CRC enable */ | |
65 | #define MODER_CRC (1 << 13) /* CRC enable */ | |
66 | #define MODER_HUGE (1 << 14) /* huge packets enable */ | |
67 | #define MODER_PAD (1 << 15) /* padding enabled */ | |
68 | #define MODER_RSM (1 << 16) /* receive small packets */ | |
69 | ||
70 | /* interrupt source and mask registers */ | |
71 | #define INT_MASK_TXF (1 << 0) /* transmit frame */ | |
72 | #define INT_MASK_TXE (1 << 1) /* transmit error */ | |
73 | #define INT_MASK_RXF (1 << 2) /* receive frame */ | |
74 | #define INT_MASK_RXE (1 << 3) /* receive error */ | |
75 | #define INT_MASK_BUSY (1 << 4) | |
76 | #define INT_MASK_TXC (1 << 5) /* transmit control frame */ | |
77 | #define INT_MASK_RXC (1 << 6) /* receive control frame */ | |
78 | ||
79 | #define INT_MASK_TX (INT_MASK_TXF | INT_MASK_TXE) | |
80 | #define INT_MASK_RX (INT_MASK_RXF | INT_MASK_RXE) | |
81 | ||
82 | #define INT_MASK_ALL ( \ | |
83 | INT_MASK_TXF | INT_MASK_TXE | \ | |
84 | INT_MASK_RXF | INT_MASK_RXE | \ | |
85 | INT_MASK_TXC | INT_MASK_RXC | \ | |
86 | INT_MASK_BUSY \ | |
87 | ) | |
88 | ||
89 | /* packet length register */ | |
90 | #define PACKETLEN_MIN(min) (((min) & 0xffff) << 16) | |
91 | #define PACKETLEN_MAX(max) (((max) & 0xffff) << 0) | |
92 | #define PACKETLEN_MIN_MAX(min, max) (PACKETLEN_MIN(min) | \ | |
93 | PACKETLEN_MAX(max)) | |
94 | ||
95 | /* transmit buffer number register */ | |
96 | #define TX_BD_NUM_VAL(x) (((x) <= 0x80) ? (x) : 0x80) | |
97 | ||
98 | /* control module mode register */ | |
99 | #define CTRLMODER_PASSALL (1 << 0) /* pass all receive frames */ | |
100 | #define CTRLMODER_RXFLOW (1 << 1) /* receive control flow */ | |
101 | #define CTRLMODER_TXFLOW (1 << 2) /* transmit control flow */ | |
102 | ||
103 | /* MII mode register */ | |
104 | #define MIIMODER_CLKDIV(x) ((x) & 0xfe) /* needs to be an even number */ | |
105 | #define MIIMODER_NOPRE (1 << 8) /* no preamble */ | |
106 | ||
107 | /* MII command register */ | |
108 | #define MIICOMMAND_SCAN (1 << 0) /* scan status */ | |
109 | #define MIICOMMAND_READ (1 << 1) /* read status */ | |
110 | #define MIICOMMAND_WRITE (1 << 2) /* write control data */ | |
111 | ||
112 | /* MII address register */ | |
113 | #define MIIADDRESS_FIAD(x) (((x) & 0x1f) << 0) | |
114 | #define MIIADDRESS_RGAD(x) (((x) & 0x1f) << 8) | |
115 | #define MIIADDRESS_ADDR(phy, reg) (MIIADDRESS_FIAD(phy) | \ | |
116 | MIIADDRESS_RGAD(reg)) | |
117 | ||
118 | /* MII transmit data register */ | |
119 | #define MIITX_DATA_VAL(x) ((x) & 0xffff) | |
120 | ||
121 | /* MII receive data register */ | |
122 | #define MIIRX_DATA_VAL(x) ((x) & 0xffff) | |
123 | ||
124 | /* MII status register */ | |
125 | #define MIISTATUS_LINKFAIL (1 << 0) | |
126 | #define MIISTATUS_BUSY (1 << 1) | |
127 | #define MIISTATUS_INVALID (1 << 2) | |
128 | ||
129 | /* TX buffer descriptor */ | |
130 | #define TX_BD_CS (1 << 0) /* carrier sense lost */ | |
131 | #define TX_BD_DF (1 << 1) /* defer indication */ | |
132 | #define TX_BD_LC (1 << 2) /* late collision */ | |
133 | #define TX_BD_RL (1 << 3) /* retransmission limit */ | |
134 | #define TX_BD_RETRY_MASK (0x00f0) | |
135 | #define TX_BD_RETRY(x) (((x) & 0x00f0) >> 4) | |
136 | #define TX_BD_UR (1 << 8) /* transmitter underrun */ | |
137 | #define TX_BD_CRC (1 << 11) /* TX CRC enable */ | |
138 | #define TX_BD_PAD (1 << 12) /* pad enable for short packets */ | |
139 | #define TX_BD_WRAP (1 << 13) | |
140 | #define TX_BD_IRQ (1 << 14) /* interrupt request enable */ | |
141 | #define TX_BD_READY (1 << 15) /* TX buffer ready */ | |
142 | #define TX_BD_LEN(x) (((x) & 0xffff) << 16) | |
143 | #define TX_BD_LEN_MASK (0xffff << 16) | |
144 | ||
145 | #define TX_BD_STATS (TX_BD_CS | TX_BD_DF | TX_BD_LC | \ | |
146 | TX_BD_RL | TX_BD_RETRY_MASK | TX_BD_UR) | |
147 | ||
148 | /* RX buffer descriptor */ | |
149 | #define RX_BD_LC (1 << 0) /* late collision */ | |
150 | #define RX_BD_CRC (1 << 1) /* RX CRC error */ | |
151 | #define RX_BD_SF (1 << 2) /* short frame */ | |
152 | #define RX_BD_TL (1 << 3) /* too long */ | |
153 | #define RX_BD_DN (1 << 4) /* dribble nibble */ | |
154 | #define RX_BD_IS (1 << 5) /* invalid symbol */ | |
155 | #define RX_BD_OR (1 << 6) /* receiver overrun */ | |
156 | #define RX_BD_MISS (1 << 7) | |
157 | #define RX_BD_CF (1 << 8) /* control frame */ | |
158 | #define RX_BD_WRAP (1 << 13) | |
159 | #define RX_BD_IRQ (1 << 14) /* interrupt request enable */ | |
160 | #define RX_BD_EMPTY (1 << 15) | |
161 | #define RX_BD_LEN(x) (((x) & 0xffff) << 16) | |
162 | ||
163 | #define RX_BD_STATS (RX_BD_LC | RX_BD_CRC | RX_BD_SF | RX_BD_TL | \ | |
164 | RX_BD_DN | RX_BD_IS | RX_BD_OR | RX_BD_MISS) | |
165 | ||
166 | #define ETHOC_BUFSIZ 1536 | |
167 | #define ETHOC_ZLEN 64 | |
168 | #define ETHOC_BD_BASE 0x400 | |
169 | #define ETHOC_TIMEOUT (HZ / 2) | |
170 | #define ETHOC_MII_TIMEOUT (1 + (HZ / 5)) | |
171 | ||
172 | /** | |
173 | * struct ethoc - driver-private device structure | |
174 | * @iobase: pointer to I/O memory region | |
175 | * @membase: pointer to buffer memory region | |
0baa080c | 176 | * @dma_alloc: dma allocated buffer size |
ee02a4ef | 177 | * @io_region_size: I/O memory region size |
a1702857 TR |
178 | * @num_tx: number of send buffers |
179 | * @cur_tx: last send buffer written | |
180 | * @dty_tx: last buffer actually sent | |
181 | * @num_rx: number of receive buffers | |
182 | * @cur_rx: current receive buffer | |
f8555ad0 | 183 | * @vma: pointer to array of virtual memory addresses for buffers |
a1702857 TR |
184 | * @netdev: pointer to network device structure |
185 | * @napi: NAPI structure | |
a1702857 TR |
186 | * @msg_enable: device state flags |
187 | * @rx_lock: receive lock | |
188 | * @lock: device lock | |
189 | * @phy: attached PHY | |
190 | * @mdio: MDIO bus for PHY access | |
191 | * @phy_id: address of attached PHY | |
192 | */ | |
193 | struct ethoc { | |
194 | void __iomem *iobase; | |
195 | void __iomem *membase; | |
0baa080c | 196 | int dma_alloc; |
ee02a4ef | 197 | resource_size_t io_region_size; |
a1702857 TR |
198 | |
199 | unsigned int num_tx; | |
200 | unsigned int cur_tx; | |
201 | unsigned int dty_tx; | |
202 | ||
203 | unsigned int num_rx; | |
204 | unsigned int cur_rx; | |
205 | ||
f8555ad0 JB |
206 | void** vma; |
207 | ||
a1702857 TR |
208 | struct net_device *netdev; |
209 | struct napi_struct napi; | |
a1702857 TR |
210 | u32 msg_enable; |
211 | ||
212 | spinlock_t rx_lock; | |
213 | spinlock_t lock; | |
214 | ||
215 | struct phy_device *phy; | |
216 | struct mii_bus *mdio; | |
217 | s8 phy_id; | |
218 | }; | |
219 | ||
220 | /** | |
221 | * struct ethoc_bd - buffer descriptor | |
222 | * @stat: buffer statistics | |
223 | * @addr: physical memory address | |
224 | */ | |
225 | struct ethoc_bd { | |
226 | u32 stat; | |
227 | u32 addr; | |
228 | }; | |
229 | ||
16dd18b0 | 230 | static inline u32 ethoc_read(struct ethoc *dev, loff_t offset) |
a1702857 TR |
231 | { |
232 | return ioread32(dev->iobase + offset); | |
233 | } | |
234 | ||
16dd18b0 | 235 | static inline void ethoc_write(struct ethoc *dev, loff_t offset, u32 data) |
a1702857 TR |
236 | { |
237 | iowrite32(data, dev->iobase + offset); | |
238 | } | |
239 | ||
16dd18b0 TC |
240 | static inline void ethoc_read_bd(struct ethoc *dev, int index, |
241 | struct ethoc_bd *bd) | |
a1702857 TR |
242 | { |
243 | loff_t offset = ETHOC_BD_BASE + (index * sizeof(struct ethoc_bd)); | |
244 | bd->stat = ethoc_read(dev, offset + 0); | |
245 | bd->addr = ethoc_read(dev, offset + 4); | |
246 | } | |
247 | ||
16dd18b0 | 248 | static inline void ethoc_write_bd(struct ethoc *dev, int index, |
a1702857 TR |
249 | const struct ethoc_bd *bd) |
250 | { | |
251 | loff_t offset = ETHOC_BD_BASE + (index * sizeof(struct ethoc_bd)); | |
252 | ethoc_write(dev, offset + 0, bd->stat); | |
253 | ethoc_write(dev, offset + 4, bd->addr); | |
254 | } | |
255 | ||
16dd18b0 | 256 | static inline void ethoc_enable_irq(struct ethoc *dev, u32 mask) |
a1702857 TR |
257 | { |
258 | u32 imask = ethoc_read(dev, INT_MASK); | |
259 | imask |= mask; | |
260 | ethoc_write(dev, INT_MASK, imask); | |
261 | } | |
262 | ||
16dd18b0 | 263 | static inline void ethoc_disable_irq(struct ethoc *dev, u32 mask) |
a1702857 TR |
264 | { |
265 | u32 imask = ethoc_read(dev, INT_MASK); | |
266 | imask &= ~mask; | |
267 | ethoc_write(dev, INT_MASK, imask); | |
268 | } | |
269 | ||
16dd18b0 | 270 | static inline void ethoc_ack_irq(struct ethoc *dev, u32 mask) |
a1702857 TR |
271 | { |
272 | ethoc_write(dev, INT_SOURCE, mask); | |
273 | } | |
274 | ||
16dd18b0 | 275 | static inline void ethoc_enable_rx_and_tx(struct ethoc *dev) |
a1702857 TR |
276 | { |
277 | u32 mode = ethoc_read(dev, MODER); | |
278 | mode |= MODER_RXEN | MODER_TXEN; | |
279 | ethoc_write(dev, MODER, mode); | |
280 | } | |
281 | ||
16dd18b0 | 282 | static inline void ethoc_disable_rx_and_tx(struct ethoc *dev) |
a1702857 TR |
283 | { |
284 | u32 mode = ethoc_read(dev, MODER); | |
285 | mode &= ~(MODER_RXEN | MODER_TXEN); | |
286 | ethoc_write(dev, MODER, mode); | |
287 | } | |
288 | ||
5cf3e034 | 289 | static int ethoc_init_ring(struct ethoc *dev, unsigned long mem_start) |
a1702857 TR |
290 | { |
291 | struct ethoc_bd bd; | |
292 | int i; | |
f8555ad0 | 293 | void* vma; |
a1702857 TR |
294 | |
295 | dev->cur_tx = 0; | |
296 | dev->dty_tx = 0; | |
297 | dev->cur_rx = 0; | |
298 | ||
ee4f56b9 JB |
299 | ethoc_write(dev, TX_BD_NUM, dev->num_tx); |
300 | ||
a1702857 | 301 | /* setup transmission buffers */ |
f8555ad0 | 302 | bd.addr = mem_start; |
a1702857 | 303 | bd.stat = TX_BD_IRQ | TX_BD_CRC; |
f8555ad0 | 304 | vma = dev->membase; |
a1702857 TR |
305 | |
306 | for (i = 0; i < dev->num_tx; i++) { | |
307 | if (i == dev->num_tx - 1) | |
308 | bd.stat |= TX_BD_WRAP; | |
309 | ||
310 | ethoc_write_bd(dev, i, &bd); | |
311 | bd.addr += ETHOC_BUFSIZ; | |
f8555ad0 JB |
312 | |
313 | dev->vma[i] = vma; | |
314 | vma += ETHOC_BUFSIZ; | |
a1702857 TR |
315 | } |
316 | ||
a1702857 TR |
317 | bd.stat = RX_BD_EMPTY | RX_BD_IRQ; |
318 | ||
319 | for (i = 0; i < dev->num_rx; i++) { | |
320 | if (i == dev->num_rx - 1) | |
321 | bd.stat |= RX_BD_WRAP; | |
322 | ||
323 | ethoc_write_bd(dev, dev->num_tx + i, &bd); | |
324 | bd.addr += ETHOC_BUFSIZ; | |
f8555ad0 JB |
325 | |
326 | dev->vma[dev->num_tx + i] = vma; | |
327 | vma += ETHOC_BUFSIZ; | |
a1702857 TR |
328 | } |
329 | ||
330 | return 0; | |
331 | } | |
332 | ||
333 | static int ethoc_reset(struct ethoc *dev) | |
334 | { | |
335 | u32 mode; | |
336 | ||
337 | /* TODO: reset controller? */ | |
338 | ||
339 | ethoc_disable_rx_and_tx(dev); | |
340 | ||
341 | /* TODO: setup registers */ | |
342 | ||
343 | /* enable FCS generation and automatic padding */ | |
344 | mode = ethoc_read(dev, MODER); | |
345 | mode |= MODER_CRC | MODER_PAD; | |
346 | ethoc_write(dev, MODER, mode); | |
347 | ||
348 | /* set full-duplex mode */ | |
349 | mode = ethoc_read(dev, MODER); | |
350 | mode |= MODER_FULLD; | |
351 | ethoc_write(dev, MODER, mode); | |
352 | ethoc_write(dev, IPGT, 0x15); | |
353 | ||
354 | ethoc_ack_irq(dev, INT_MASK_ALL); | |
355 | ethoc_enable_irq(dev, INT_MASK_ALL); | |
356 | ethoc_enable_rx_and_tx(dev); | |
357 | return 0; | |
358 | } | |
359 | ||
360 | static unsigned int ethoc_update_rx_stats(struct ethoc *dev, | |
361 | struct ethoc_bd *bd) | |
362 | { | |
363 | struct net_device *netdev = dev->netdev; | |
364 | unsigned int ret = 0; | |
365 | ||
366 | if (bd->stat & RX_BD_TL) { | |
367 | dev_err(&netdev->dev, "RX: frame too long\n"); | |
57616ee4 | 368 | netdev->stats.rx_length_errors++; |
a1702857 TR |
369 | ret++; |
370 | } | |
371 | ||
372 | if (bd->stat & RX_BD_SF) { | |
373 | dev_err(&netdev->dev, "RX: frame too short\n"); | |
57616ee4 | 374 | netdev->stats.rx_length_errors++; |
a1702857 TR |
375 | ret++; |
376 | } | |
377 | ||
378 | if (bd->stat & RX_BD_DN) { | |
379 | dev_err(&netdev->dev, "RX: dribble nibble\n"); | |
57616ee4 | 380 | netdev->stats.rx_frame_errors++; |
a1702857 TR |
381 | } |
382 | ||
383 | if (bd->stat & RX_BD_CRC) { | |
384 | dev_err(&netdev->dev, "RX: wrong CRC\n"); | |
57616ee4 | 385 | netdev->stats.rx_crc_errors++; |
a1702857 TR |
386 | ret++; |
387 | } | |
388 | ||
389 | if (bd->stat & RX_BD_OR) { | |
390 | dev_err(&netdev->dev, "RX: overrun\n"); | |
57616ee4 | 391 | netdev->stats.rx_over_errors++; |
a1702857 TR |
392 | ret++; |
393 | } | |
394 | ||
395 | if (bd->stat & RX_BD_MISS) | |
57616ee4 | 396 | netdev->stats.rx_missed_errors++; |
a1702857 TR |
397 | |
398 | if (bd->stat & RX_BD_LC) { | |
399 | dev_err(&netdev->dev, "RX: late collision\n"); | |
57616ee4 | 400 | netdev->stats.collisions++; |
a1702857 TR |
401 | ret++; |
402 | } | |
403 | ||
404 | return ret; | |
405 | } | |
406 | ||
407 | static int ethoc_rx(struct net_device *dev, int limit) | |
408 | { | |
409 | struct ethoc *priv = netdev_priv(dev); | |
410 | int count; | |
411 | ||
412 | for (count = 0; count < limit; ++count) { | |
413 | unsigned int entry; | |
414 | struct ethoc_bd bd; | |
415 | ||
416 | entry = priv->num_tx + (priv->cur_rx % priv->num_rx); | |
417 | ethoc_read_bd(priv, entry, &bd); | |
418 | if (bd.stat & RX_BD_EMPTY) | |
419 | break; | |
420 | ||
421 | if (ethoc_update_rx_stats(priv, &bd) == 0) { | |
422 | int size = bd.stat >> 16; | |
89d71a66 | 423 | struct sk_buff *skb; |
050f91dc TC |
424 | |
425 | size -= 4; /* strip the CRC */ | |
89d71a66 | 426 | skb = netdev_alloc_skb_ip_align(dev, size); |
050f91dc | 427 | |
a1702857 | 428 | if (likely(skb)) { |
f8555ad0 | 429 | void *src = priv->vma[entry]; |
a1702857 TR |
430 | memcpy_fromio(skb_put(skb, size), src, size); |
431 | skb->protocol = eth_type_trans(skb, dev); | |
57616ee4 KV |
432 | dev->stats.rx_packets++; |
433 | dev->stats.rx_bytes += size; | |
a1702857 TR |
434 | netif_receive_skb(skb); |
435 | } else { | |
436 | if (net_ratelimit()) | |
437 | dev_warn(&dev->dev, "low on memory - " | |
438 | "packet dropped\n"); | |
439 | ||
57616ee4 | 440 | dev->stats.rx_dropped++; |
a1702857 TR |
441 | break; |
442 | } | |
443 | } | |
444 | ||
445 | /* clear the buffer descriptor so it can be reused */ | |
446 | bd.stat &= ~RX_BD_STATS; | |
447 | bd.stat |= RX_BD_EMPTY; | |
448 | ethoc_write_bd(priv, entry, &bd); | |
449 | priv->cur_rx++; | |
450 | } | |
451 | ||
452 | return count; | |
453 | } | |
454 | ||
455 | static int ethoc_update_tx_stats(struct ethoc *dev, struct ethoc_bd *bd) | |
456 | { | |
457 | struct net_device *netdev = dev->netdev; | |
458 | ||
459 | if (bd->stat & TX_BD_LC) { | |
460 | dev_err(&netdev->dev, "TX: late collision\n"); | |
57616ee4 | 461 | netdev->stats.tx_window_errors++; |
a1702857 TR |
462 | } |
463 | ||
464 | if (bd->stat & TX_BD_RL) { | |
465 | dev_err(&netdev->dev, "TX: retransmit limit\n"); | |
57616ee4 | 466 | netdev->stats.tx_aborted_errors++; |
a1702857 TR |
467 | } |
468 | ||
469 | if (bd->stat & TX_BD_UR) { | |
470 | dev_err(&netdev->dev, "TX: underrun\n"); | |
57616ee4 | 471 | netdev->stats.tx_fifo_errors++; |
a1702857 TR |
472 | } |
473 | ||
474 | if (bd->stat & TX_BD_CS) { | |
475 | dev_err(&netdev->dev, "TX: carrier sense lost\n"); | |
57616ee4 | 476 | netdev->stats.tx_carrier_errors++; |
a1702857 TR |
477 | } |
478 | ||
479 | if (bd->stat & TX_BD_STATS) | |
57616ee4 | 480 | netdev->stats.tx_errors++; |
a1702857 | 481 | |
57616ee4 KV |
482 | netdev->stats.collisions += (bd->stat >> 4) & 0xf; |
483 | netdev->stats.tx_bytes += bd->stat >> 16; | |
484 | netdev->stats.tx_packets++; | |
a1702857 TR |
485 | return 0; |
486 | } | |
487 | ||
488 | static void ethoc_tx(struct net_device *dev) | |
489 | { | |
490 | struct ethoc *priv = netdev_priv(dev); | |
491 | ||
492 | spin_lock(&priv->lock); | |
493 | ||
494 | while (priv->dty_tx != priv->cur_tx) { | |
495 | unsigned int entry = priv->dty_tx % priv->num_tx; | |
496 | struct ethoc_bd bd; | |
497 | ||
498 | ethoc_read_bd(priv, entry, &bd); | |
499 | if (bd.stat & TX_BD_READY) | |
500 | break; | |
501 | ||
502 | entry = (++priv->dty_tx) % priv->num_tx; | |
503 | (void)ethoc_update_tx_stats(priv, &bd); | |
504 | } | |
505 | ||
506 | if ((priv->cur_tx - priv->dty_tx) <= (priv->num_tx / 2)) | |
507 | netif_wake_queue(dev); | |
508 | ||
509 | ethoc_ack_irq(priv, INT_MASK_TX); | |
510 | spin_unlock(&priv->lock); | |
511 | } | |
512 | ||
513 | static irqreturn_t ethoc_interrupt(int irq, void *dev_id) | |
514 | { | |
57616ee4 | 515 | struct net_device *dev = dev_id; |
a1702857 TR |
516 | struct ethoc *priv = netdev_priv(dev); |
517 | u32 pending; | |
518 | ||
519 | ethoc_disable_irq(priv, INT_MASK_ALL); | |
520 | pending = ethoc_read(priv, INT_SOURCE); | |
521 | if (unlikely(pending == 0)) { | |
522 | ethoc_enable_irq(priv, INT_MASK_ALL); | |
523 | return IRQ_NONE; | |
524 | } | |
525 | ||
50c54a57 | 526 | ethoc_ack_irq(priv, pending); |
a1702857 TR |
527 | |
528 | if (pending & INT_MASK_BUSY) { | |
529 | dev_err(&dev->dev, "packet dropped\n"); | |
57616ee4 | 530 | dev->stats.rx_dropped++; |
a1702857 TR |
531 | } |
532 | ||
533 | if (pending & INT_MASK_RX) { | |
534 | if (napi_schedule_prep(&priv->napi)) | |
535 | __napi_schedule(&priv->napi); | |
536 | } else { | |
537 | ethoc_enable_irq(priv, INT_MASK_RX); | |
538 | } | |
539 | ||
540 | if (pending & INT_MASK_TX) | |
541 | ethoc_tx(dev); | |
542 | ||
543 | ethoc_enable_irq(priv, INT_MASK_ALL & ~INT_MASK_RX); | |
544 | return IRQ_HANDLED; | |
545 | } | |
546 | ||
547 | static int ethoc_get_mac_address(struct net_device *dev, void *addr) | |
548 | { | |
549 | struct ethoc *priv = netdev_priv(dev); | |
550 | u8 *mac = (u8 *)addr; | |
551 | u32 reg; | |
552 | ||
553 | reg = ethoc_read(priv, MAC_ADDR0); | |
554 | mac[2] = (reg >> 24) & 0xff; | |
555 | mac[3] = (reg >> 16) & 0xff; | |
556 | mac[4] = (reg >> 8) & 0xff; | |
557 | mac[5] = (reg >> 0) & 0xff; | |
558 | ||
559 | reg = ethoc_read(priv, MAC_ADDR1); | |
560 | mac[0] = (reg >> 8) & 0xff; | |
561 | mac[1] = (reg >> 0) & 0xff; | |
562 | ||
563 | return 0; | |
564 | } | |
565 | ||
566 | static int ethoc_poll(struct napi_struct *napi, int budget) | |
567 | { | |
568 | struct ethoc *priv = container_of(napi, struct ethoc, napi); | |
569 | int work_done = 0; | |
570 | ||
571 | work_done = ethoc_rx(priv->netdev, budget); | |
572 | if (work_done < budget) { | |
573 | ethoc_enable_irq(priv, INT_MASK_RX); | |
574 | napi_complete(napi); | |
575 | } | |
576 | ||
577 | return work_done; | |
578 | } | |
579 | ||
580 | static int ethoc_mdio_read(struct mii_bus *bus, int phy, int reg) | |
581 | { | |
582 | unsigned long timeout = jiffies + ETHOC_MII_TIMEOUT; | |
583 | struct ethoc *priv = bus->priv; | |
584 | ||
585 | ethoc_write(priv, MIIADDRESS, MIIADDRESS_ADDR(phy, reg)); | |
586 | ethoc_write(priv, MIICOMMAND, MIICOMMAND_READ); | |
587 | ||
588 | while (time_before(jiffies, timeout)) { | |
589 | u32 status = ethoc_read(priv, MIISTATUS); | |
590 | if (!(status & MIISTATUS_BUSY)) { | |
591 | u32 data = ethoc_read(priv, MIIRX_DATA); | |
592 | /* reset MII command register */ | |
593 | ethoc_write(priv, MIICOMMAND, 0); | |
594 | return data; | |
595 | } | |
596 | ||
597 | schedule(); | |
598 | } | |
599 | ||
600 | return -EBUSY; | |
601 | } | |
602 | ||
603 | static int ethoc_mdio_write(struct mii_bus *bus, int phy, int reg, u16 val) | |
604 | { | |
605 | unsigned long timeout = jiffies + ETHOC_MII_TIMEOUT; | |
606 | struct ethoc *priv = bus->priv; | |
607 | ||
608 | ethoc_write(priv, MIIADDRESS, MIIADDRESS_ADDR(phy, reg)); | |
609 | ethoc_write(priv, MIITX_DATA, val); | |
610 | ethoc_write(priv, MIICOMMAND, MIICOMMAND_WRITE); | |
611 | ||
612 | while (time_before(jiffies, timeout)) { | |
613 | u32 stat = ethoc_read(priv, MIISTATUS); | |
b46773db JB |
614 | if (!(stat & MIISTATUS_BUSY)) { |
615 | /* reset MII command register */ | |
616 | ethoc_write(priv, MIICOMMAND, 0); | |
a1702857 | 617 | return 0; |
b46773db | 618 | } |
a1702857 TR |
619 | |
620 | schedule(); | |
621 | } | |
622 | ||
623 | return -EBUSY; | |
624 | } | |
625 | ||
626 | static int ethoc_mdio_reset(struct mii_bus *bus) | |
627 | { | |
628 | return 0; | |
629 | } | |
630 | ||
631 | static void ethoc_mdio_poll(struct net_device *dev) | |
632 | { | |
633 | } | |
634 | ||
635 | static int ethoc_mdio_probe(struct net_device *dev) | |
636 | { | |
637 | struct ethoc *priv = netdev_priv(dev); | |
638 | struct phy_device *phy; | |
637f33b8 | 639 | int err; |
a1702857 | 640 | |
637f33b8 JB |
641 | if (priv->phy_id != -1) { |
642 | phy = priv->mdio->phy_map[priv->phy_id]; | |
643 | } else { | |
644 | phy = phy_find_first(priv->mdio); | |
a1702857 TR |
645 | } |
646 | ||
647 | if (!phy) { | |
648 | dev_err(&dev->dev, "no PHY found\n"); | |
649 | return -ENXIO; | |
650 | } | |
651 | ||
637f33b8 | 652 | err = phy_connect_direct(dev, phy, ethoc_mdio_poll, 0, |
a1702857 | 653 | PHY_INTERFACE_MODE_GMII); |
637f33b8 | 654 | if (err) { |
a1702857 | 655 | dev_err(&dev->dev, "could not attach to PHY\n"); |
637f33b8 | 656 | return err; |
a1702857 TR |
657 | } |
658 | ||
659 | priv->phy = phy; | |
660 | return 0; | |
661 | } | |
662 | ||
663 | static int ethoc_open(struct net_device *dev) | |
664 | { | |
665 | struct ethoc *priv = netdev_priv(dev); | |
a1702857 TR |
666 | int ret; |
667 | ||
668 | ret = request_irq(dev->irq, ethoc_interrupt, IRQF_SHARED, | |
669 | dev->name, dev); | |
670 | if (ret) | |
671 | return ret; | |
672 | ||
5cf3e034 | 673 | ethoc_init_ring(priv, dev->mem_start); |
a1702857 TR |
674 | ethoc_reset(priv); |
675 | ||
676 | if (netif_queue_stopped(dev)) { | |
677 | dev_dbg(&dev->dev, " resuming queue\n"); | |
678 | netif_wake_queue(dev); | |
679 | } else { | |
680 | dev_dbg(&dev->dev, " starting queue\n"); | |
681 | netif_start_queue(dev); | |
682 | } | |
683 | ||
684 | phy_start(priv->phy); | |
685 | napi_enable(&priv->napi); | |
686 | ||
687 | if (netif_msg_ifup(priv)) { | |
688 | dev_info(&dev->dev, "I/O: %08lx Memory: %08lx-%08lx\n", | |
689 | dev->base_addr, dev->mem_start, dev->mem_end); | |
690 | } | |
691 | ||
692 | return 0; | |
693 | } | |
694 | ||
695 | static int ethoc_stop(struct net_device *dev) | |
696 | { | |
697 | struct ethoc *priv = netdev_priv(dev); | |
698 | ||
699 | napi_disable(&priv->napi); | |
700 | ||
701 | if (priv->phy) | |
702 | phy_stop(priv->phy); | |
703 | ||
704 | ethoc_disable_rx_and_tx(priv); | |
705 | free_irq(dev->irq, dev); | |
706 | ||
707 | if (!netif_queue_stopped(dev)) | |
708 | netif_stop_queue(dev); | |
709 | ||
710 | return 0; | |
711 | } | |
712 | ||
713 | static int ethoc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
714 | { | |
715 | struct ethoc *priv = netdev_priv(dev); | |
716 | struct mii_ioctl_data *mdio = if_mii(ifr); | |
717 | struct phy_device *phy = NULL; | |
718 | ||
719 | if (!netif_running(dev)) | |
720 | return -EINVAL; | |
721 | ||
722 | if (cmd != SIOCGMIIPHY) { | |
723 | if (mdio->phy_id >= PHY_MAX_ADDR) | |
724 | return -ERANGE; | |
725 | ||
726 | phy = priv->mdio->phy_map[mdio->phy_id]; | |
727 | if (!phy) | |
728 | return -ENODEV; | |
729 | } else { | |
730 | phy = priv->phy; | |
731 | } | |
732 | ||
28b04113 | 733 | return phy_mii_ioctl(phy, ifr, cmd); |
a1702857 TR |
734 | } |
735 | ||
736 | static int ethoc_config(struct net_device *dev, struct ifmap *map) | |
737 | { | |
738 | return -ENOSYS; | |
739 | } | |
740 | ||
741 | static int ethoc_set_mac_address(struct net_device *dev, void *addr) | |
742 | { | |
743 | struct ethoc *priv = netdev_priv(dev); | |
744 | u8 *mac = (u8 *)addr; | |
745 | ||
746 | ethoc_write(priv, MAC_ADDR0, (mac[2] << 24) | (mac[3] << 16) | | |
747 | (mac[4] << 8) | (mac[5] << 0)); | |
748 | ethoc_write(priv, MAC_ADDR1, (mac[0] << 8) | (mac[1] << 0)); | |
749 | ||
750 | return 0; | |
751 | } | |
752 | ||
753 | static void ethoc_set_multicast_list(struct net_device *dev) | |
754 | { | |
755 | struct ethoc *priv = netdev_priv(dev); | |
756 | u32 mode = ethoc_read(priv, MODER); | |
22bedad3 | 757 | struct netdev_hw_addr *ha; |
a1702857 TR |
758 | u32 hash[2] = { 0, 0 }; |
759 | ||
760 | /* set loopback mode if requested */ | |
761 | if (dev->flags & IFF_LOOPBACK) | |
762 | mode |= MODER_LOOP; | |
763 | else | |
764 | mode &= ~MODER_LOOP; | |
765 | ||
766 | /* receive broadcast frames if requested */ | |
767 | if (dev->flags & IFF_BROADCAST) | |
768 | mode &= ~MODER_BRO; | |
769 | else | |
770 | mode |= MODER_BRO; | |
771 | ||
772 | /* enable promiscuous mode if requested */ | |
773 | if (dev->flags & IFF_PROMISC) | |
774 | mode |= MODER_PRO; | |
775 | else | |
776 | mode &= ~MODER_PRO; | |
777 | ||
778 | ethoc_write(priv, MODER, mode); | |
779 | ||
780 | /* receive multicast frames */ | |
781 | if (dev->flags & IFF_ALLMULTI) { | |
782 | hash[0] = 0xffffffff; | |
783 | hash[1] = 0xffffffff; | |
784 | } else { | |
22bedad3 JP |
785 | netdev_for_each_mc_addr(ha, dev) { |
786 | u32 crc = ether_crc(ETH_ALEN, ha->addr); | |
a1702857 TR |
787 | int bit = (crc >> 26) & 0x3f; |
788 | hash[bit >> 5] |= 1 << (bit & 0x1f); | |
789 | } | |
790 | } | |
791 | ||
792 | ethoc_write(priv, ETH_HASH0, hash[0]); | |
793 | ethoc_write(priv, ETH_HASH1, hash[1]); | |
794 | } | |
795 | ||
796 | static int ethoc_change_mtu(struct net_device *dev, int new_mtu) | |
797 | { | |
798 | return -ENOSYS; | |
799 | } | |
800 | ||
801 | static void ethoc_tx_timeout(struct net_device *dev) | |
802 | { | |
803 | struct ethoc *priv = netdev_priv(dev); | |
804 | u32 pending = ethoc_read(priv, INT_SOURCE); | |
805 | if (likely(pending)) | |
806 | ethoc_interrupt(dev->irq, dev); | |
807 | } | |
808 | ||
809 | static struct net_device_stats *ethoc_stats(struct net_device *dev) | |
810 | { | |
57616ee4 | 811 | return &dev->stats; |
a1702857 TR |
812 | } |
813 | ||
61357325 | 814 | static netdev_tx_t ethoc_start_xmit(struct sk_buff *skb, struct net_device *dev) |
a1702857 TR |
815 | { |
816 | struct ethoc *priv = netdev_priv(dev); | |
817 | struct ethoc_bd bd; | |
818 | unsigned int entry; | |
819 | void *dest; | |
820 | ||
821 | if (unlikely(skb->len > ETHOC_BUFSIZ)) { | |
57616ee4 | 822 | dev->stats.tx_errors++; |
3790c8cd | 823 | goto out; |
a1702857 TR |
824 | } |
825 | ||
826 | entry = priv->cur_tx % priv->num_tx; | |
827 | spin_lock_irq(&priv->lock); | |
828 | priv->cur_tx++; | |
829 | ||
830 | ethoc_read_bd(priv, entry, &bd); | |
831 | if (unlikely(skb->len < ETHOC_ZLEN)) | |
832 | bd.stat |= TX_BD_PAD; | |
833 | else | |
834 | bd.stat &= ~TX_BD_PAD; | |
835 | ||
f8555ad0 | 836 | dest = priv->vma[entry]; |
a1702857 TR |
837 | memcpy_toio(dest, skb->data, skb->len); |
838 | ||
839 | bd.stat &= ~(TX_BD_STATS | TX_BD_LEN_MASK); | |
840 | bd.stat |= TX_BD_LEN(skb->len); | |
841 | ethoc_write_bd(priv, entry, &bd); | |
842 | ||
843 | bd.stat |= TX_BD_READY; | |
844 | ethoc_write_bd(priv, entry, &bd); | |
845 | ||
846 | if (priv->cur_tx == (priv->dty_tx + priv->num_tx)) { | |
847 | dev_dbg(&dev->dev, "stopping queue\n"); | |
848 | netif_stop_queue(dev); | |
849 | } | |
850 | ||
a1702857 | 851 | spin_unlock_irq(&priv->lock); |
3790c8cd PM |
852 | out: |
853 | dev_kfree_skb(skb); | |
a1702857 TR |
854 | return NETDEV_TX_OK; |
855 | } | |
856 | ||
857 | static const struct net_device_ops ethoc_netdev_ops = { | |
858 | .ndo_open = ethoc_open, | |
859 | .ndo_stop = ethoc_stop, | |
860 | .ndo_do_ioctl = ethoc_ioctl, | |
861 | .ndo_set_config = ethoc_config, | |
862 | .ndo_set_mac_address = ethoc_set_mac_address, | |
863 | .ndo_set_multicast_list = ethoc_set_multicast_list, | |
864 | .ndo_change_mtu = ethoc_change_mtu, | |
865 | .ndo_tx_timeout = ethoc_tx_timeout, | |
866 | .ndo_get_stats = ethoc_stats, | |
867 | .ndo_start_xmit = ethoc_start_xmit, | |
868 | }; | |
869 | ||
870 | /** | |
871 | * ethoc_probe() - initialize OpenCores ethernet MAC | |
872 | * pdev: platform device | |
873 | */ | |
874 | static int ethoc_probe(struct platform_device *pdev) | |
875 | { | |
876 | struct net_device *netdev = NULL; | |
877 | struct resource *res = NULL; | |
878 | struct resource *mmio = NULL; | |
879 | struct resource *mem = NULL; | |
880 | struct ethoc *priv = NULL; | |
881 | unsigned int phy; | |
c527f814 | 882 | int num_bd; |
a1702857 TR |
883 | int ret = 0; |
884 | ||
885 | /* allocate networking device */ | |
886 | netdev = alloc_etherdev(sizeof(struct ethoc)); | |
887 | if (!netdev) { | |
888 | dev_err(&pdev->dev, "cannot allocate network device\n"); | |
889 | ret = -ENOMEM; | |
890 | goto out; | |
891 | } | |
892 | ||
893 | SET_NETDEV_DEV(netdev, &pdev->dev); | |
894 | platform_set_drvdata(pdev, netdev); | |
895 | ||
896 | /* obtain I/O memory space */ | |
897 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
898 | if (!res) { | |
899 | dev_err(&pdev->dev, "cannot obtain I/O memory space\n"); | |
900 | ret = -ENXIO; | |
901 | goto free; | |
902 | } | |
903 | ||
904 | mmio = devm_request_mem_region(&pdev->dev, res->start, | |
d8645847 | 905 | resource_size(res), res->name); |
463889e2 | 906 | if (!mmio) { |
a1702857 TR |
907 | dev_err(&pdev->dev, "cannot request I/O memory space\n"); |
908 | ret = -ENXIO; | |
909 | goto free; | |
910 | } | |
911 | ||
912 | netdev->base_addr = mmio->start; | |
913 | ||
914 | /* obtain buffer memory space */ | |
915 | res = platform_get_resource(pdev, IORESOURCE_MEM, 1); | |
0baa080c TC |
916 | if (res) { |
917 | mem = devm_request_mem_region(&pdev->dev, res->start, | |
d8645847 | 918 | resource_size(res), res->name); |
0baa080c TC |
919 | if (!mem) { |
920 | dev_err(&pdev->dev, "cannot request memory space\n"); | |
921 | ret = -ENXIO; | |
922 | goto free; | |
923 | } | |
924 | ||
925 | netdev->mem_start = mem->start; | |
926 | netdev->mem_end = mem->end; | |
a1702857 TR |
927 | } |
928 | ||
a1702857 TR |
929 | |
930 | /* obtain device IRQ number */ | |
931 | res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
932 | if (!res) { | |
933 | dev_err(&pdev->dev, "cannot obtain IRQ\n"); | |
934 | ret = -ENXIO; | |
935 | goto free; | |
936 | } | |
937 | ||
938 | netdev->irq = res->start; | |
939 | ||
940 | /* setup driver-private data */ | |
941 | priv = netdev_priv(netdev); | |
942 | priv->netdev = netdev; | |
0baa080c | 943 | priv->dma_alloc = 0; |
ee02a4ef | 944 | priv->io_region_size = mmio->end - mmio->start + 1; |
a1702857 TR |
945 | |
946 | priv->iobase = devm_ioremap_nocache(&pdev->dev, netdev->base_addr, | |
d8645847 | 947 | resource_size(mmio)); |
a1702857 TR |
948 | if (!priv->iobase) { |
949 | dev_err(&pdev->dev, "cannot remap I/O memory space\n"); | |
950 | ret = -ENXIO; | |
951 | goto error; | |
952 | } | |
953 | ||
0baa080c TC |
954 | if (netdev->mem_end) { |
955 | priv->membase = devm_ioremap_nocache(&pdev->dev, | |
d8645847 | 956 | netdev->mem_start, resource_size(mem)); |
0baa080c TC |
957 | if (!priv->membase) { |
958 | dev_err(&pdev->dev, "cannot remap memory space\n"); | |
959 | ret = -ENXIO; | |
960 | goto error; | |
961 | } | |
962 | } else { | |
963 | /* Allocate buffer memory */ | |
a71fba97 | 964 | priv->membase = dmam_alloc_coherent(&pdev->dev, |
0baa080c TC |
965 | buffer_size, (void *)&netdev->mem_start, |
966 | GFP_KERNEL); | |
967 | if (!priv->membase) { | |
968 | dev_err(&pdev->dev, "cannot allocate %dB buffer\n", | |
969 | buffer_size); | |
970 | ret = -ENOMEM; | |
971 | goto error; | |
972 | } | |
973 | netdev->mem_end = netdev->mem_start + buffer_size; | |
974 | priv->dma_alloc = buffer_size; | |
a1702857 TR |
975 | } |
976 | ||
c527f814 JB |
977 | /* calculate the number of TX/RX buffers, maximum 128 supported */ |
978 | num_bd = min_t(unsigned int, | |
979 | 128, (netdev->mem_end - netdev->mem_start + 1) / ETHOC_BUFSIZ); | |
980 | priv->num_tx = max(2, num_bd / 4); | |
981 | priv->num_rx = num_bd - priv->num_tx; | |
982 | ||
f8555ad0 JB |
983 | priv->vma = devm_kzalloc(&pdev->dev, num_bd*sizeof(void*), GFP_KERNEL); |
984 | if (!priv->vma) { | |
985 | ret = -ENOMEM; | |
986 | goto error; | |
987 | } | |
988 | ||
a1702857 TR |
989 | /* Allow the platform setup code to pass in a MAC address. */ |
990 | if (pdev->dev.platform_data) { | |
991 | struct ethoc_platform_data *pdata = | |
992 | (struct ethoc_platform_data *)pdev->dev.platform_data; | |
993 | memcpy(netdev->dev_addr, pdata->hwaddr, IFHWADDRLEN); | |
994 | priv->phy_id = pdata->phy_id; | |
995 | } | |
996 | ||
997 | /* Check that the given MAC address is valid. If it isn't, read the | |
998 | * current MAC from the controller. */ | |
999 | if (!is_valid_ether_addr(netdev->dev_addr)) | |
1000 | ethoc_get_mac_address(netdev, netdev->dev_addr); | |
1001 | ||
1002 | /* Check the MAC again for validity, if it still isn't choose and | |
1003 | * program a random one. */ | |
1004 | if (!is_valid_ether_addr(netdev->dev_addr)) | |
1005 | random_ether_addr(netdev->dev_addr); | |
1006 | ||
1007 | ethoc_set_mac_address(netdev, netdev->dev_addr); | |
1008 | ||
1009 | /* register MII bus */ | |
1010 | priv->mdio = mdiobus_alloc(); | |
1011 | if (!priv->mdio) { | |
1012 | ret = -ENOMEM; | |
1013 | goto free; | |
1014 | } | |
1015 | ||
1016 | priv->mdio->name = "ethoc-mdio"; | |
1017 | snprintf(priv->mdio->id, MII_BUS_ID_SIZE, "%s-%d", | |
1018 | priv->mdio->name, pdev->id); | |
1019 | priv->mdio->read = ethoc_mdio_read; | |
1020 | priv->mdio->write = ethoc_mdio_write; | |
1021 | priv->mdio->reset = ethoc_mdio_reset; | |
1022 | priv->mdio->priv = priv; | |
1023 | ||
1024 | priv->mdio->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL); | |
1025 | if (!priv->mdio->irq) { | |
1026 | ret = -ENOMEM; | |
1027 | goto free_mdio; | |
1028 | } | |
1029 | ||
1030 | for (phy = 0; phy < PHY_MAX_ADDR; phy++) | |
1031 | priv->mdio->irq[phy] = PHY_POLL; | |
1032 | ||
1033 | ret = mdiobus_register(priv->mdio); | |
1034 | if (ret) { | |
1035 | dev_err(&netdev->dev, "failed to register MDIO bus\n"); | |
1036 | goto free_mdio; | |
1037 | } | |
1038 | ||
1039 | ret = ethoc_mdio_probe(netdev); | |
1040 | if (ret) { | |
1041 | dev_err(&netdev->dev, "failed to probe MDIO bus\n"); | |
1042 | goto error; | |
1043 | } | |
1044 | ||
1045 | ether_setup(netdev); | |
1046 | ||
1047 | /* setup the net_device structure */ | |
1048 | netdev->netdev_ops = ðoc_netdev_ops; | |
1049 | netdev->watchdog_timeo = ETHOC_TIMEOUT; | |
1050 | netdev->features |= 0; | |
1051 | ||
1052 | /* setup NAPI */ | |
a1702857 TR |
1053 | netif_napi_add(netdev, &priv->napi, ethoc_poll, 64); |
1054 | ||
1055 | spin_lock_init(&priv->rx_lock); | |
1056 | spin_lock_init(&priv->lock); | |
1057 | ||
1058 | ret = register_netdev(netdev); | |
1059 | if (ret < 0) { | |
1060 | dev_err(&netdev->dev, "failed to register interface\n"); | |
ee02a4ef | 1061 | goto error2; |
a1702857 TR |
1062 | } |
1063 | ||
1064 | goto out; | |
1065 | ||
ee02a4ef TC |
1066 | error2: |
1067 | netif_napi_del(&priv->napi); | |
a1702857 TR |
1068 | error: |
1069 | mdiobus_unregister(priv->mdio); | |
1070 | free_mdio: | |
1071 | kfree(priv->mdio->irq); | |
1072 | mdiobus_free(priv->mdio); | |
1073 | free: | |
1074 | free_netdev(netdev); | |
1075 | out: | |
1076 | return ret; | |
1077 | } | |
1078 | ||
1079 | /** | |
1080 | * ethoc_remove() - shutdown OpenCores ethernet MAC | |
1081 | * @pdev: platform device | |
1082 | */ | |
1083 | static int ethoc_remove(struct platform_device *pdev) | |
1084 | { | |
1085 | struct net_device *netdev = platform_get_drvdata(pdev); | |
1086 | struct ethoc *priv = netdev_priv(netdev); | |
1087 | ||
1088 | platform_set_drvdata(pdev, NULL); | |
1089 | ||
1090 | if (netdev) { | |
ee02a4ef | 1091 | netif_napi_del(&priv->napi); |
a1702857 TR |
1092 | phy_disconnect(priv->phy); |
1093 | priv->phy = NULL; | |
1094 | ||
1095 | if (priv->mdio) { | |
1096 | mdiobus_unregister(priv->mdio); | |
1097 | kfree(priv->mdio->irq); | |
1098 | mdiobus_free(priv->mdio); | |
1099 | } | |
a1702857 TR |
1100 | unregister_netdev(netdev); |
1101 | free_netdev(netdev); | |
1102 | } | |
1103 | ||
1104 | return 0; | |
1105 | } | |
1106 | ||
1107 | #ifdef CONFIG_PM | |
1108 | static int ethoc_suspend(struct platform_device *pdev, pm_message_t state) | |
1109 | { | |
1110 | return -ENOSYS; | |
1111 | } | |
1112 | ||
1113 | static int ethoc_resume(struct platform_device *pdev) | |
1114 | { | |
1115 | return -ENOSYS; | |
1116 | } | |
1117 | #else | |
1118 | # define ethoc_suspend NULL | |
1119 | # define ethoc_resume NULL | |
1120 | #endif | |
1121 | ||
1122 | static struct platform_driver ethoc_driver = { | |
1123 | .probe = ethoc_probe, | |
1124 | .remove = ethoc_remove, | |
1125 | .suspend = ethoc_suspend, | |
1126 | .resume = ethoc_resume, | |
1127 | .driver = { | |
1128 | .name = "ethoc", | |
1129 | }, | |
1130 | }; | |
1131 | ||
1132 | static int __init ethoc_init(void) | |
1133 | { | |
1134 | return platform_driver_register(ðoc_driver); | |
1135 | } | |
1136 | ||
1137 | static void __exit ethoc_exit(void) | |
1138 | { | |
1139 | platform_driver_unregister(ðoc_driver); | |
1140 | } | |
1141 | ||
1142 | module_init(ethoc_init); | |
1143 | module_exit(ethoc_exit); | |
1144 | ||
1145 | MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>"); | |
1146 | MODULE_DESCRIPTION("OpenCores Ethernet MAC driver"); | |
1147 | MODULE_LICENSE("GPL v2"); | |
1148 |