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PM / sleep: Asynchronous threads for suspend_noirq
[linux/fpc-iii.git] / drivers / net / ethernet / wiznet / w5300.c
blob71c27b3292f1318a30a26dcd25d277dfcc5bd119
1 /*
2 * Ethernet driver for the WIZnet W5300 chip.
3 *
4 * Copyright (C) 2008-2009 WIZnet Co.,Ltd.
5 * Copyright (C) 2011 Taehun Kim <kth3321 <at> gmail.com>
6 * Copyright (C) 2012 Mike Sinkovsky <msink@permonline.ru>
7 *
8 * Licensed under the GPL-2 or later.
9 */
10
11 #include <linux/kernel.h>
12 #include <linux/module.h>
13 #include <linux/kconfig.h>
14 #include <linux/netdevice.h>
15 #include <linux/etherdevice.h>
16 #include <linux/platform_device.h>
17 #include <linux/platform_data/wiznet.h>
18 #include <linux/ethtool.h>
19 #include <linux/skbuff.h>
20 #include <linux/types.h>
21 #include <linux/errno.h>
22 #include <linux/delay.h>
23 #include <linux/slab.h>
24 #include <linux/spinlock.h>
25 #include <linux/io.h>
26 #include <linux/ioport.h>
27 #include <linux/interrupt.h>
28 #include <linux/irq.h>
29 #include <linux/gpio.h>
30
31 #define DRV_NAME "w5300"
32 #define DRV_VERSION "2012-04-04"
33
34 MODULE_DESCRIPTION("WIZnet W5300 Ethernet driver v"DRV_VERSION);
35 MODULE_AUTHOR("Mike Sinkovsky <msink@permonline.ru>");
36 MODULE_ALIAS("platform:"DRV_NAME);
37 MODULE_LICENSE("GPL");
38
39 /*
40 * Registers
41 */
42 #define W5300_MR 0x0000 /* Mode Register */
43 #define MR_DBW (1 << 15) /* Data bus width */
44 #define MR_MPF (1 << 14) /* Mac layer pause frame */
45 #define MR_WDF(n) (((n)&7)<<11) /* Write data fetch time */
46 #define MR_RDH (1 << 10) /* Read data hold time */
47 #define MR_FS (1 << 8) /* FIFO swap */
48 #define MR_RST (1 << 7) /* S/W reset */
49 #define MR_PB (1 << 4) /* Ping block */
50 #define MR_DBS (1 << 2) /* Data bus swap */
51 #define MR_IND (1 << 0) /* Indirect mode */
52 #define W5300_IR 0x0002 /* Interrupt Register */
53 #define W5300_IMR 0x0004 /* Interrupt Mask Register */
54 #define IR_S0 0x0001 /* S0 interrupt */
55 #define W5300_SHARL 0x0008 /* Source MAC address (0123) */
56 #define W5300_SHARH 0x000c /* Source MAC address (45) */
57 #define W5300_TMSRL 0x0020 /* Transmit Memory Size (0123) */
58 #define W5300_TMSRH 0x0024 /* Transmit Memory Size (4567) */
59 #define W5300_RMSRL 0x0028 /* Receive Memory Size (0123) */
60 #define W5300_RMSRH 0x002c /* Receive Memory Size (4567) */
61 #define W5300_MTYPE 0x0030 /* Memory Type */
62 #define W5300_IDR 0x00fe /* Chip ID register */
63 #define IDR_W5300 0x5300 /* =0x5300 for WIZnet W5300 */
64 #define W5300_S0_MR 0x0200 /* S0 Mode Register */
65 #define S0_MR_CLOSED 0x0000 /* Close mode */
66 #define S0_MR_MACRAW 0x0004 /* MAC RAW mode (promiscous) */
67 #define S0_MR_MACRAW_MF 0x0044 /* MAC RAW mode (filtered) */
68 #define W5300_S0_CR 0x0202 /* S0 Command Register */
69 #define S0_CR_OPEN 0x0001 /* OPEN command */
70 #define S0_CR_CLOSE 0x0010 /* CLOSE command */
71 #define S0_CR_SEND 0x0020 /* SEND command */
72 #define S0_CR_RECV 0x0040 /* RECV command */
73 #define W5300_S0_IMR 0x0204 /* S0 Interrupt Mask Register */
74 #define W5300_S0_IR 0x0206 /* S0 Interrupt Register */
75 #define S0_IR_RECV 0x0004 /* Receive interrupt */
76 #define S0_IR_SENDOK 0x0010 /* Send OK interrupt */
77 #define W5300_S0_SSR 0x0208 /* S0 Socket Status Register */
78 #define W5300_S0_TX_WRSR 0x0220 /* S0 TX Write Size Register */
79 #define W5300_S0_TX_FSR 0x0224 /* S0 TX Free Size Register */
80 #define W5300_S0_RX_RSR 0x0228 /* S0 Received data Size */
81 #define W5300_S0_TX_FIFO 0x022e /* S0 Transmit FIFO */
82 #define W5300_S0_RX_FIFO 0x0230 /* S0 Receive FIFO */
83 #define W5300_REGS_LEN 0x0400
84
85 /*
86 * Device driver private data structure
87 */
88 struct w5300_priv {
89 void __iomem *base;
90 spinlock_t reg_lock;
91 bool indirect;
92 u16 (*read) (struct w5300_priv *priv, u16 addr);
93 void (*write)(struct w5300_priv *priv, u16 addr, u16 data);
94 int irq;
95 int link_irq;
96 int link_gpio;
97
98 struct napi_struct napi;
99 struct net_device *ndev;
100 bool promisc;
101 u32 msg_enable;
102 };
103
104 /************************************************************************
105 *
106 * Lowlevel I/O functions
107 *
108 ***********************************************************************/
109
110 /*
111 * In direct address mode host system can directly access W5300 registers
112 * after mapping to Memory-Mapped I/O space.
113 *
114 * 0x400 bytes are required for memory space.
115 */
116 static inline u16 w5300_read_direct(struct w5300_priv *priv, u16 addr)
117 {
118 return ioread16(priv->base + (addr << CONFIG_WIZNET_BUS_SHIFT));
119 }
120
121 static inline void w5300_write_direct(struct w5300_priv *priv,
122 u16 addr, u16 data)
123 {
124 iowrite16(data, priv->base + (addr << CONFIG_WIZNET_BUS_SHIFT));
125 }
126
127 /*
128 * In indirect address mode host system indirectly accesses registers by
129 * using Indirect Mode Address Register (IDM_AR) and Indirect Mode Data
130 * Register (IDM_DR), which are directly mapped to Memory-Mapped I/O space.
131 * Mode Register (MR) is directly accessible.
132 *
133 * Only 0x06 bytes are required for memory space.
134 */
135 #define W5300_IDM_AR 0x0002 /* Indirect Mode Address */
136 #define W5300_IDM_DR 0x0004 /* Indirect Mode Data */
137
138 static u16 w5300_read_indirect(struct w5300_priv *priv, u16 addr)
139 {
140 unsigned long flags;
141 u16 data;
142
143 spin_lock_irqsave(&priv->reg_lock, flags);
144 w5300_write_direct(priv, W5300_IDM_AR, addr);
145 mmiowb();
146 data = w5300_read_direct(priv, W5300_IDM_DR);
147 spin_unlock_irqrestore(&priv->reg_lock, flags);
148
149 return data;
150 }
151
152 static void w5300_write_indirect(struct w5300_priv *priv, u16 addr, u16 data)
153 {
154 unsigned long flags;
155
156 spin_lock_irqsave(&priv->reg_lock, flags);
157 w5300_write_direct(priv, W5300_IDM_AR, addr);
158 mmiowb();
159 w5300_write_direct(priv, W5300_IDM_DR, data);
160 mmiowb();
161 spin_unlock_irqrestore(&priv->reg_lock, flags);
162 }
163
164 #if defined(CONFIG_WIZNET_BUS_DIRECT)
165 #define w5300_read w5300_read_direct
166 #define w5300_write w5300_write_direct
167
168 #elif defined(CONFIG_WIZNET_BUS_INDIRECT)
169 #define w5300_read w5300_read_indirect
170 #define w5300_write w5300_write_indirect
171
172 #else /* CONFIG_WIZNET_BUS_ANY */
173 #define w5300_read priv->read
174 #define w5300_write priv->write
175 #endif
176
177 static u32 w5300_read32(struct w5300_priv *priv, u16 addr)
178 {
179 u32 data;
180 data = w5300_read(priv, addr) << 16;
181 data |= w5300_read(priv, addr + 2);
182 return data;
183 }
184
185 static void w5300_write32(struct w5300_priv *priv, u16 addr, u32 data)
186 {
187 w5300_write(priv, addr, data >> 16);
188 w5300_write(priv, addr + 2, data);
189 }
190
191 static int w5300_command(struct w5300_priv *priv, u16 cmd)
192 {
193 unsigned long timeout = jiffies + msecs_to_jiffies(100);
194
195 w5300_write(priv, W5300_S0_CR, cmd);
196 mmiowb();
197
198 while (w5300_read(priv, W5300_S0_CR) != 0) {
199 if (time_after(jiffies, timeout))
200 return -EIO;
201 cpu_relax();
202 }
203
204 return 0;
205 }
206
207 static void w5300_read_frame(struct w5300_priv *priv, u8 *buf, int len)
208 {
209 u16 fifo;
210 int i;
211
212 for (i = 0; i < len; i += 2) {
213 fifo = w5300_read(priv, W5300_S0_RX_FIFO);
214 *buf++ = fifo >> 8;
215 *buf++ = fifo;
216 }
217 fifo = w5300_read(priv, W5300_S0_RX_FIFO);
218 fifo = w5300_read(priv, W5300_S0_RX_FIFO);
219 }
220
221 static void w5300_write_frame(struct w5300_priv *priv, u8 *buf, int len)
222 {
223 u16 fifo;
224 int i;
225
226 for (i = 0; i < len; i += 2) {
227 fifo = *buf++ << 8;
228 fifo |= *buf++;
229 w5300_write(priv, W5300_S0_TX_FIFO, fifo);
230 }
231 w5300_write32(priv, W5300_S0_TX_WRSR, len);
232 }
233
234 static void w5300_write_macaddr(struct w5300_priv *priv)
235 {
236 struct net_device *ndev = priv->ndev;
237 w5300_write32(priv, W5300_SHARL,
238 ndev->dev_addr[0] << 24 |
239 ndev->dev_addr[1] << 16 |
240 ndev->dev_addr[2] << 8 |
241 ndev->dev_addr[3]);
242 w5300_write(priv, W5300_SHARH,
243 ndev->dev_addr[4] << 8 |
244 ndev->dev_addr[5]);
245 mmiowb();
246 }
247
248 static void w5300_hw_reset(struct w5300_priv *priv)
249 {
250 w5300_write_direct(priv, W5300_MR, MR_RST);
251 mmiowb();
252 mdelay(5);
253 w5300_write_direct(priv, W5300_MR, priv->indirect ?
254 MR_WDF(7) | MR_PB | MR_IND :
255 MR_WDF(7) | MR_PB);
256 mmiowb();
257 w5300_write(priv, W5300_IMR, 0);
258 w5300_write_macaddr(priv);
259
260 /* Configure 128K of internal memory
261 * as 64K RX fifo and 64K TX fifo
262 */
263 w5300_write32(priv, W5300_RMSRL, 64 << 24);
264 w5300_write32(priv, W5300_RMSRH, 0);
265 w5300_write32(priv, W5300_TMSRL, 64 << 24);
266 w5300_write32(priv, W5300_TMSRH, 0);
267 w5300_write(priv, W5300_MTYPE, 0x00ff);
268 mmiowb();
269 }
270
271 static void w5300_hw_start(struct w5300_priv *priv)
272 {
273 w5300_write(priv, W5300_S0_MR, priv->promisc ?
274 S0_MR_MACRAW : S0_MR_MACRAW_MF);
275 mmiowb();
276 w5300_command(priv, S0_CR_OPEN);
277 w5300_write(priv, W5300_S0_IMR, S0_IR_RECV | S0_IR_SENDOK);
278 w5300_write(priv, W5300_IMR, IR_S0);
279 mmiowb();
280 }
281
282 static void w5300_hw_close(struct w5300_priv *priv)
283 {
284 w5300_write(priv, W5300_IMR, 0);
285 mmiowb();
286 w5300_command(priv, S0_CR_CLOSE);
287 }
288
289 /***********************************************************************
290 *
291 * Device driver functions / callbacks
292 *
293 ***********************************************************************/
294
295 static void w5300_get_drvinfo(struct net_device *ndev,
296 struct ethtool_drvinfo *info)
297 {
298 strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
299 strlcpy(info->version, DRV_VERSION, sizeof(info->version));
300 strlcpy(info->bus_info, dev_name(ndev->dev.parent),
301 sizeof(info->bus_info));
302 }
303
304 static u32 w5300_get_link(struct net_device *ndev)
305 {
306 struct w5300_priv *priv = netdev_priv(ndev);
307
308 if (gpio_is_valid(priv->link_gpio))
309 return !!gpio_get_value(priv->link_gpio);
310
311 return 1;
312 }
313
314 static u32 w5300_get_msglevel(struct net_device *ndev)
315 {
316 struct w5300_priv *priv = netdev_priv(ndev);
317
318 return priv->msg_enable;
319 }
320
321 static void w5300_set_msglevel(struct net_device *ndev, u32 value)
322 {
323 struct w5300_priv *priv = netdev_priv(ndev);
324
325 priv->msg_enable = value;
326 }
327
328 static int w5300_get_regs_len(struct net_device *ndev)
329 {
330 return W5300_REGS_LEN;
331 }
332
333 static void w5300_get_regs(struct net_device *ndev,
334 struct ethtool_regs *regs, void *_buf)
335 {
336 struct w5300_priv *priv = netdev_priv(ndev);
337 u8 *buf = _buf;
338 u16 addr;
339 u16 data;
340
341 regs->version = 1;
342 for (addr = 0; addr < W5300_REGS_LEN; addr += 2) {
343 switch (addr & 0x23f) {
344 case W5300_S0_TX_FIFO: /* cannot read TX_FIFO */
345 case W5300_S0_RX_FIFO: /* cannot read RX_FIFO */
346 data = 0xffff;
347 break;
348 default:
349 data = w5300_read(priv, addr);
350 break;
351 }
352 *buf++ = data >> 8;
353 *buf++ = data;
354 }
355 }
356
357 static void w5300_tx_timeout(struct net_device *ndev)
358 {
359 struct w5300_priv *priv = netdev_priv(ndev);
360
361 netif_stop_queue(ndev);
362 w5300_hw_reset(priv);
363 w5300_hw_start(priv);
364 ndev->stats.tx_errors++;
365 ndev->trans_start = jiffies;
366 netif_wake_queue(ndev);
367 }
368
369 static int w5300_start_tx(struct sk_buff *skb, struct net_device *ndev)
370 {
371 struct w5300_priv *priv = netdev_priv(ndev);
372
373 netif_stop_queue(ndev);
374
375 w5300_write_frame(priv, skb->data, skb->len);
376 mmiowb();
377 ndev->stats.tx_packets++;
378 ndev->stats.tx_bytes += skb->len;
379 dev_kfree_skb(skb);
380 netif_dbg(priv, tx_queued, ndev, "tx queued\n");
381
382 w5300_command(priv, S0_CR_SEND);
383
384 return NETDEV_TX_OK;
385 }
386
387 static int w5300_napi_poll(struct napi_struct *napi, int budget)
388 {
389 struct w5300_priv *priv = container_of(napi, struct w5300_priv, napi);
390 struct net_device *ndev = priv->ndev;
391 struct sk_buff *skb;
392 int rx_count;
393 u16 rx_len;
394
395 for (rx_count = 0; rx_count < budget; rx_count++) {
396 u32 rx_fifo_len = w5300_read32(priv, W5300_S0_RX_RSR);
397 if (rx_fifo_len == 0)
398 break;
399
400 rx_len = w5300_read(priv, W5300_S0_RX_FIFO);
401
402 skb = netdev_alloc_skb_ip_align(ndev, roundup(rx_len, 2));
403 if (unlikely(!skb)) {
404 u32 i;
405 for (i = 0; i < rx_fifo_len; i += 2)
406 w5300_read(priv, W5300_S0_RX_FIFO);
407 ndev->stats.rx_dropped++;
408 return -ENOMEM;
409 }
410
411 skb_put(skb, rx_len);
412 w5300_read_frame(priv, skb->data, rx_len);
413 skb->protocol = eth_type_trans(skb, ndev);
414
415 netif_receive_skb(skb);
416 ndev->stats.rx_packets++;
417 ndev->stats.rx_bytes += rx_len;
418 }
419
420 if (rx_count < budget) {
421 w5300_write(priv, W5300_IMR, IR_S0);
422 mmiowb();
423 napi_complete(napi);
424 }
425
426 return rx_count;
427 }
428
429 static irqreturn_t w5300_interrupt(int irq, void *ndev_instance)
430 {
431 struct net_device *ndev = ndev_instance;
432 struct w5300_priv *priv = netdev_priv(ndev);
433
434 int ir = w5300_read(priv, W5300_S0_IR);
435 if (!ir)
436 return IRQ_NONE;
437 w5300_write(priv, W5300_S0_IR, ir);
438 mmiowb();
439
440 if (ir & S0_IR_SENDOK) {
441 netif_dbg(priv, tx_done, ndev, "tx done\n");
442 netif_wake_queue(ndev);
443 }
444
445 if (ir & S0_IR_RECV) {
446 if (napi_schedule_prep(&priv->napi)) {
447 w5300_write(priv, W5300_IMR, 0);
448 mmiowb();
449 __napi_schedule(&priv->napi);
450 }
451 }
452
453 return IRQ_HANDLED;
454 }
455
456 static irqreturn_t w5300_detect_link(int irq, void *ndev_instance)
457 {
458 struct net_device *ndev = ndev_instance;
459 struct w5300_priv *priv = netdev_priv(ndev);
460
461 if (netif_running(ndev)) {
462 if (gpio_get_value(priv->link_gpio) != 0) {
463 netif_info(priv, link, ndev, "link is up\n");
464 netif_carrier_on(ndev);
465 } else {
466 netif_info(priv, link, ndev, "link is down\n");
467 netif_carrier_off(ndev);
468 }
469 }
470
471 return IRQ_HANDLED;
472 }
473
474 static void w5300_set_rx_mode(struct net_device *ndev)
475 {
476 struct w5300_priv *priv = netdev_priv(ndev);
477 bool set_promisc = (ndev->flags & IFF_PROMISC) != 0;
478
479 if (priv->promisc != set_promisc) {
480 priv->promisc = set_promisc;
481 w5300_hw_start(priv);
482 }
483 }
484
485 static int w5300_set_macaddr(struct net_device *ndev, void *addr)
486 {
487 struct w5300_priv *priv = netdev_priv(ndev);
488 struct sockaddr *sock_addr = addr;
489
490 if (!is_valid_ether_addr(sock_addr->sa_data))
491 return -EADDRNOTAVAIL;
492 memcpy(ndev->dev_addr, sock_addr->sa_data, ETH_ALEN);
493 w5300_write_macaddr(priv);
494 return 0;
495 }
496
497 static int w5300_open(struct net_device *ndev)
498 {
499 struct w5300_priv *priv = netdev_priv(ndev);
500
501 netif_info(priv, ifup, ndev, "enabling\n");
502 w5300_hw_start(priv);
503 napi_enable(&priv->napi);
504 netif_start_queue(ndev);
505 if (!gpio_is_valid(priv->link_gpio) ||
506 gpio_get_value(priv->link_gpio) != 0)
507 netif_carrier_on(ndev);
508 return 0;
509 }
510
511 static int w5300_stop(struct net_device *ndev)
512 {
513 struct w5300_priv *priv = netdev_priv(ndev);
514
515 netif_info(priv, ifdown, ndev, "shutting down\n");
516 w5300_hw_close(priv);
517 netif_carrier_off(ndev);
518 netif_stop_queue(ndev);
519 napi_disable(&priv->napi);
520 return 0;
521 }
522
523 static const struct ethtool_ops w5300_ethtool_ops = {
524 .get_drvinfo = w5300_get_drvinfo,
525 .get_msglevel = w5300_get_msglevel,
526 .set_msglevel = w5300_set_msglevel,
527 .get_link = w5300_get_link,
528 .get_regs_len = w5300_get_regs_len,
529 .get_regs = w5300_get_regs,
530 };
531
532 static const struct net_device_ops w5300_netdev_ops = {
533 .ndo_open = w5300_open,
534 .ndo_stop = w5300_stop,
535 .ndo_start_xmit = w5300_start_tx,
536 .ndo_tx_timeout = w5300_tx_timeout,
537 .ndo_set_rx_mode = w5300_set_rx_mode,
538 .ndo_set_mac_address = w5300_set_macaddr,
539 .ndo_validate_addr = eth_validate_addr,
540 .ndo_change_mtu = eth_change_mtu,
541 };
542
543 static int w5300_hw_probe(struct platform_device *pdev)
544 {
545 struct wiznet_platform_data *data = dev_get_platdata(&pdev->dev);
546 struct net_device *ndev = platform_get_drvdata(pdev);
547 struct w5300_priv *priv = netdev_priv(ndev);
548 const char *name = netdev_name(ndev);
549 struct resource *mem;
550 int mem_size;
551 int irq;
552 int ret;
553
554 if (data && is_valid_ether_addr(data->mac_addr)) {
555 memcpy(ndev->dev_addr, data->mac_addr, ETH_ALEN);
556 } else {
557 eth_hw_addr_random(ndev);
558 }
559
560 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
561 if (!mem)
562 return -ENXIO;
563 mem_size = resource_size(mem);
564 if (!devm_request_mem_region(&pdev->dev, mem->start, mem_size, name))
565 return -EBUSY;
566 priv->base = devm_ioremap(&pdev->dev, mem->start, mem_size);
567 if (!priv->base)
568 return -EBUSY;
569
570 spin_lock_init(&priv->reg_lock);
571 priv->indirect = mem_size < W5300_BUS_DIRECT_SIZE;
572 if (priv->indirect) {
573 priv->read = w5300_read_indirect;
574 priv->write = w5300_write_indirect;
575 } else {
576 priv->read = w5300_read_direct;
577 priv->write = w5300_write_direct;
578 }
579
580 w5300_hw_reset(priv);
581 if (w5300_read(priv, W5300_IDR) != IDR_W5300)
582 return -ENODEV;
583
584 irq = platform_get_irq(pdev, 0);
585 if (irq < 0)
586 return irq;
587 ret = request_irq(irq, w5300_interrupt,
588 IRQ_TYPE_LEVEL_LOW, name, ndev);
589 if (ret < 0)
590 return ret;
591 priv->irq = irq;
592
593 priv->link_gpio = data ? data->link_gpio : -EINVAL;
594 if (gpio_is_valid(priv->link_gpio)) {
595 char *link_name = devm_kzalloc(&pdev->dev, 16, GFP_KERNEL);
596 if (!link_name)
597 return -ENOMEM;
598 snprintf(link_name, 16, "%s-link", name);
599 priv->link_irq = gpio_to_irq(priv->link_gpio);
600 if (request_any_context_irq(priv->link_irq, w5300_detect_link,
601 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
602 link_name, priv->ndev) < 0)
603 priv->link_gpio = -EINVAL;
604 }
605
606 netdev_info(ndev, "at 0x%llx irq %d\n", (u64)mem->start, irq);
607 return 0;
608 }
609
610 static int w5300_probe(struct platform_device *pdev)
611 {
612 struct w5300_priv *priv;
613 struct net_device *ndev;
614 int err;
615
616 ndev = alloc_etherdev(sizeof(*priv));
617 if (!ndev)
618 return -ENOMEM;
619 SET_NETDEV_DEV(ndev, &pdev->dev);
620 platform_set_drvdata(pdev, ndev);
621 priv = netdev_priv(ndev);
622 priv->ndev = ndev;
623
624 ether_setup(ndev);
625 ndev->netdev_ops = &w5300_netdev_ops;
626 ndev->ethtool_ops = &w5300_ethtool_ops;
627 ndev->watchdog_timeo = HZ;
628 netif_napi_add(ndev, &priv->napi, w5300_napi_poll, 16);
629
630 /* This chip doesn't support VLAN packets with normal MTU,
631 * so disable VLAN for this device.
632 */
633 ndev->features |= NETIF_F_VLAN_CHALLENGED;
634
635 err = register_netdev(ndev);
636 if (err < 0)
637 goto err_register;
638
639 err = w5300_hw_probe(pdev);
640 if (err < 0)
641 goto err_hw_probe;
642
643 return 0;
644
645 err_hw_probe:
646 unregister_netdev(ndev);
647 err_register:
648 free_netdev(ndev);
649 return err;
650 }
651
652 static int w5300_remove(struct platform_device *pdev)
653 {
654 struct net_device *ndev = platform_get_drvdata(pdev);
655 struct w5300_priv *priv = netdev_priv(ndev);
656
657 w5300_hw_reset(priv);
658 free_irq(priv->irq, ndev);
659 if (gpio_is_valid(priv->link_gpio))
660 free_irq(priv->link_irq, ndev);
661
662 unregister_netdev(ndev);
663 free_netdev(ndev);
664 return 0;
665 }
666
667 #ifdef CONFIG_PM_SLEEP
668 static int w5300_suspend(struct device *dev)
669 {
670 struct platform_device *pdev = to_platform_device(dev);
671 struct net_device *ndev = platform_get_drvdata(pdev);
672 struct w5300_priv *priv = netdev_priv(ndev);
673
674 if (netif_running(ndev)) {
675 netif_carrier_off(ndev);
676 netif_device_detach(ndev);
677
678 w5300_hw_close(priv);
679 }
680 return 0;
681 }
682
683 static int w5300_resume(struct device *dev)
684 {
685 struct platform_device *pdev = to_platform_device(dev);
686 struct net_device *ndev = platform_get_drvdata(pdev);
687 struct w5300_priv *priv = netdev_priv(ndev);
688
689 if (!netif_running(ndev)) {
690 w5300_hw_reset(priv);
691 w5300_hw_start(priv);
692
693 netif_device_attach(ndev);
694 if (!gpio_is_valid(priv->link_gpio) ||
695 gpio_get_value(priv->link_gpio) != 0)
696 netif_carrier_on(ndev);
697 }
698 return 0;
699 }
700 #endif /* CONFIG_PM_SLEEP */
701
702 static SIMPLE_DEV_PM_OPS(w5300_pm_ops, w5300_suspend, w5300_resume);
703
704 static struct platform_driver w5300_driver = {
705 .driver = {
706 .name = DRV_NAME,
707 .owner = THIS_MODULE,
708 .pm = &w5300_pm_ops,
709 },
710 .probe = w5300_probe,
711 .remove = w5300_remove,
712 };
713
714 module_platform_driver(w5300_driver);
Linux with added FPC-III support