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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Ethernet driver for the WIZnet W5300 chip.
4 *
5 * Copyright (C) 2008-2009 WIZnet Co.,Ltd.
6 * Copyright (C) 2011 Taehun Kim <kth3321 <at> gmail.com>
7 * Copyright (C) 2012 Mike Sinkovsky <msink@permonline.ru>
8 */
9
10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/netdevice.h>
13#include <linux/etherdevice.h>
14#include <linux/platform_device.h>
15#include <linux/platform_data/wiznet.h>
16#include <linux/ethtool.h>
17#include <linux/skbuff.h>
18#include <linux/types.h>
19#include <linux/errno.h>
20#include <linux/delay.h>
21#include <linux/slab.h>
22#include <linux/spinlock.h>
23#include <linux/io.h>
24#include <linux/ioport.h>
25#include <linux/interrupt.h>
26#include <linux/irq.h>
27#include <linux/gpio.h>
28
29#define DRV_NAME "w5300"
30#define DRV_VERSION "2012-04-04"
31
32MODULE_DESCRIPTION("WIZnet W5300 Ethernet driver v"DRV_VERSION);
33MODULE_AUTHOR("Mike Sinkovsky <msink@permonline.ru>");
34MODULE_ALIAS("platform:"DRV_NAME);
35MODULE_LICENSE("GPL");
36
37/*
38 * Registers
39 */
40#define W5300_MR 0x0000 /* Mode Register */
41#define MR_DBW (1 << 15) /* Data bus width */
42#define MR_MPF (1 << 14) /* Mac layer pause frame */
43#define MR_WDF(n) (((n)&7)<<11) /* Write data fetch time */
44#define MR_RDH (1 << 10) /* Read data hold time */
45#define MR_FS (1 << 8) /* FIFO swap */
46#define MR_RST (1 << 7) /* S/W reset */
47#define MR_PB (1 << 4) /* Ping block */
48#define MR_DBS (1 << 2) /* Data bus swap */
49#define MR_IND (1 << 0) /* Indirect mode */
50#define W5300_IR 0x0002 /* Interrupt Register */
51#define W5300_IMR 0x0004 /* Interrupt Mask Register */
52#define IR_S0 0x0001 /* S0 interrupt */
53#define W5300_SHARL 0x0008 /* Source MAC address (0123) */
54#define W5300_SHARH 0x000c /* Source MAC address (45) */
55#define W5300_TMSRL 0x0020 /* Transmit Memory Size (0123) */
56#define W5300_TMSRH 0x0024 /* Transmit Memory Size (4567) */
57#define W5300_RMSRL 0x0028 /* Receive Memory Size (0123) */
58#define W5300_RMSRH 0x002c /* Receive Memory Size (4567) */
59#define W5300_MTYPE 0x0030 /* Memory Type */
60#define W5300_IDR 0x00fe /* Chip ID register */
61#define IDR_W5300 0x5300 /* =0x5300 for WIZnet W5300 */
62#define W5300_S0_MR 0x0200 /* S0 Mode Register */
63#define S0_MR_CLOSED 0x0000 /* Close mode */
64#define S0_MR_MACRAW 0x0004 /* MAC RAW mode (promiscuous) */
65#define S0_MR_MACRAW_MF 0x0044 /* MAC RAW mode (filtered) */
66#define W5300_S0_CR 0x0202 /* S0 Command Register */
67#define S0_CR_OPEN 0x0001 /* OPEN command */
68#define S0_CR_CLOSE 0x0010 /* CLOSE command */
69#define S0_CR_SEND 0x0020 /* SEND command */
70#define S0_CR_RECV 0x0040 /* RECV command */
71#define W5300_S0_IMR 0x0204 /* S0 Interrupt Mask Register */
72#define W5300_S0_IR 0x0206 /* S0 Interrupt Register */
73#define S0_IR_RECV 0x0004 /* Receive interrupt */
74#define S0_IR_SENDOK 0x0010 /* Send OK interrupt */
75#define W5300_S0_SSR 0x0208 /* S0 Socket Status Register */
76#define W5300_S0_TX_WRSR 0x0220 /* S0 TX Write Size Register */
77#define W5300_S0_TX_FSR 0x0224 /* S0 TX Free Size Register */
78#define W5300_S0_RX_RSR 0x0228 /* S0 Received data Size */
79#define W5300_S0_TX_FIFO 0x022e /* S0 Transmit FIFO */
80#define W5300_S0_RX_FIFO 0x0230 /* S0 Receive FIFO */
81#define W5300_REGS_LEN 0x0400
82
83/*
84 * Device driver private data structure
85 */
86struct w5300_priv {
87 void __iomem *base;
88 spinlock_t reg_lock;
89 bool indirect;
90 u16 (*read) (struct w5300_priv *priv, u16 addr);
91 void (*write)(struct w5300_priv *priv, u16 addr, u16 data);
92 int irq;
93 int link_irq;
94 int link_gpio;
95
96 struct napi_struct napi;
97 struct net_device *ndev;
98 bool promisc;
99 u32 msg_enable;
100};
101
102/************************************************************************
103 *
104 * Lowlevel I/O functions
105 *
106 ***********************************************************************/
107
108/*
109 * In direct address mode host system can directly access W5300 registers
110 * after mapping to Memory-Mapped I/O space.
111 *
112 * 0x400 bytes are required for memory space.
113 */
114static inline u16 w5300_read_direct(struct w5300_priv *priv, u16 addr)
115{
116 return ioread16(priv->base + (addr << CONFIG_WIZNET_BUS_SHIFT));
117}
118
119static inline void w5300_write_direct(struct w5300_priv *priv,
120 u16 addr, u16 data)
121{
122 iowrite16(data, priv->base + (addr << CONFIG_WIZNET_BUS_SHIFT));
123}
124
125/*
126 * In indirect address mode host system indirectly accesses registers by
127 * using Indirect Mode Address Register (IDM_AR) and Indirect Mode Data
128 * Register (IDM_DR), which are directly mapped to Memory-Mapped I/O space.
129 * Mode Register (MR) is directly accessible.
130 *
131 * Only 0x06 bytes are required for memory space.
132 */
133#define W5300_IDM_AR 0x0002 /* Indirect Mode Address */
134#define W5300_IDM_DR 0x0004 /* Indirect Mode Data */
135
136static u16 w5300_read_indirect(struct w5300_priv *priv, u16 addr)
137{
138 unsigned long flags;
139 u16 data;
140
141 spin_lock_irqsave(&priv->reg_lock, flags);
142 w5300_write_direct(priv, W5300_IDM_AR, addr);
143 data = w5300_read_direct(priv, W5300_IDM_DR);
144 spin_unlock_irqrestore(&priv->reg_lock, flags);
145
146 return data;
147}
148
149static void w5300_write_indirect(struct w5300_priv *priv, u16 addr, u16 data)
150{
151 unsigned long flags;
152
153 spin_lock_irqsave(&priv->reg_lock, flags);
154 w5300_write_direct(priv, W5300_IDM_AR, addr);
155 w5300_write_direct(priv, W5300_IDM_DR, data);
156 spin_unlock_irqrestore(&priv->reg_lock, flags);
157}
158
159#if defined(CONFIG_WIZNET_BUS_DIRECT)
160#define w5300_read w5300_read_direct
161#define w5300_write w5300_write_direct
162
163#elif defined(CONFIG_WIZNET_BUS_INDIRECT)
164#define w5300_read w5300_read_indirect
165#define w5300_write w5300_write_indirect
166
167#else /* CONFIG_WIZNET_BUS_ANY */
168#define w5300_read priv->read
169#define w5300_write priv->write
170#endif
171
172static u32 w5300_read32(struct w5300_priv *priv, u16 addr)
173{
174 u32 data;
175 data = w5300_read(priv, addr) << 16;
176 data |= w5300_read(priv, addr + 2);
177 return data;
178}
179
180static void w5300_write32(struct w5300_priv *priv, u16 addr, u32 data)
181{
182 w5300_write(priv, addr, data >> 16);
183 w5300_write(priv, addr + 2, data);
184}
185
186static int w5300_command(struct w5300_priv *priv, u16 cmd)
187{
188 unsigned long timeout = jiffies + msecs_to_jiffies(100);
189
190 w5300_write(priv, W5300_S0_CR, cmd);
191
192 while (w5300_read(priv, W5300_S0_CR) != 0) {
193 if (time_after(jiffies, timeout))
194 return -EIO;
195 cpu_relax();
196 }
197
198 return 0;
199}
200
201static void w5300_read_frame(struct w5300_priv *priv, u8 *buf, int len)
202{
203 u16 fifo;
204 int i;
205
206 for (i = 0; i < len; i += 2) {
207 fifo = w5300_read(priv, W5300_S0_RX_FIFO);
208 *buf++ = fifo >> 8;
209 *buf++ = fifo;
210 }
211 fifo = w5300_read(priv, W5300_S0_RX_FIFO);
212 fifo = w5300_read(priv, W5300_S0_RX_FIFO);
213}
214
215static void w5300_write_frame(struct w5300_priv *priv, u8 *buf, int len)
216{
217 u16 fifo;
218 int i;
219
220 for (i = 0; i < len; i += 2) {
221 fifo = *buf++ << 8;
222 fifo |= *buf++;
223 w5300_write(priv, W5300_S0_TX_FIFO, fifo);
224 }
225 w5300_write32(priv, W5300_S0_TX_WRSR, len);
226}
227
228static void w5300_write_macaddr(struct w5300_priv *priv)
229{
230 struct net_device *ndev = priv->ndev;
231 w5300_write32(priv, W5300_SHARL,
232 ndev->dev_addr[0] << 24 |
233 ndev->dev_addr[1] << 16 |
234 ndev->dev_addr[2] << 8 |
235 ndev->dev_addr[3]);
236 w5300_write(priv, W5300_SHARH,
237 ndev->dev_addr[4] << 8 |
238 ndev->dev_addr[5]);
239}
240
241static void w5300_hw_reset(struct w5300_priv *priv)
242{
243 w5300_write_direct(priv, W5300_MR, MR_RST);
244 mdelay(5);
245 w5300_write_direct(priv, W5300_MR, priv->indirect ?
246 MR_WDF(7) | MR_PB | MR_IND :
247 MR_WDF(7) | MR_PB);
248 w5300_write(priv, W5300_IMR, 0);
249 w5300_write_macaddr(priv);
250
251 /* Configure 128K of internal memory
252 * as 64K RX fifo and 64K TX fifo
253 */
254 w5300_write32(priv, W5300_RMSRL, 64 << 24);
255 w5300_write32(priv, W5300_RMSRH, 0);
256 w5300_write32(priv, W5300_TMSRL, 64 << 24);
257 w5300_write32(priv, W5300_TMSRH, 0);
258 w5300_write(priv, W5300_MTYPE, 0x00ff);
259}
260
261static void w5300_hw_start(struct w5300_priv *priv)
262{
263 w5300_write(priv, W5300_S0_MR, priv->promisc ?
264 S0_MR_MACRAW : S0_MR_MACRAW_MF);
265 w5300_command(priv, S0_CR_OPEN);
266 w5300_write(priv, W5300_S0_IMR, S0_IR_RECV | S0_IR_SENDOK);
267 w5300_write(priv, W5300_IMR, IR_S0);
268}
269
270static void w5300_hw_close(struct w5300_priv *priv)
271{
272 w5300_write(priv, W5300_IMR, 0);
273 w5300_command(priv, S0_CR_CLOSE);
274}
275
276/***********************************************************************
277 *
278 * Device driver functions / callbacks
279 *
280 ***********************************************************************/
281
282static void w5300_get_drvinfo(struct net_device *ndev,
283 struct ethtool_drvinfo *info)
284{
285 strscpy(info->driver, DRV_NAME, sizeof(info->driver));
286 strscpy(info->version, DRV_VERSION, sizeof(info->version));
287 strscpy(info->bus_info, dev_name(ndev->dev.parent),
288 sizeof(info->bus_info));
289}
290
291static u32 w5300_get_link(struct net_device *ndev)
292{
293 struct w5300_priv *priv = netdev_priv(ndev);
294
295 if (gpio_is_valid(priv->link_gpio))
296 return !!gpio_get_value(priv->link_gpio);
297
298 return 1;
299}
300
301static u32 w5300_get_msglevel(struct net_device *ndev)
302{
303 struct w5300_priv *priv = netdev_priv(ndev);
304
305 return priv->msg_enable;
306}
307
308static void w5300_set_msglevel(struct net_device *ndev, u32 value)
309{
310 struct w5300_priv *priv = netdev_priv(ndev);
311
312 priv->msg_enable = value;
313}
314
315static int w5300_get_regs_len(struct net_device *ndev)
316{
317 return W5300_REGS_LEN;
318}
319
320static void w5300_get_regs(struct net_device *ndev,
321 struct ethtool_regs *regs, void *_buf)
322{
323 struct w5300_priv *priv = netdev_priv(ndev);
324 u8 *buf = _buf;
325 u16 addr;
326 u16 data;
327
328 regs->version = 1;
329 for (addr = 0; addr < W5300_REGS_LEN; addr += 2) {
330 switch (addr & 0x23f) {
331 case W5300_S0_TX_FIFO: /* cannot read TX_FIFO */
332 case W5300_S0_RX_FIFO: /* cannot read RX_FIFO */
333 data = 0xffff;
334 break;
335 default:
336 data = w5300_read(priv, addr);
337 break;
338 }
339 *buf++ = data >> 8;
340 *buf++ = data;
341 }
342}
343
344static void w5300_tx_timeout(struct net_device *ndev, unsigned int txqueue)
345{
346 struct w5300_priv *priv = netdev_priv(ndev);
347
348 netif_stop_queue(ndev);
349 w5300_hw_reset(priv);
350 w5300_hw_start(priv);
351 ndev->stats.tx_errors++;
352 netif_trans_update(ndev);
353 netif_wake_queue(ndev);
354}
355
356static netdev_tx_t w5300_start_tx(struct sk_buff *skb, struct net_device *ndev)
357{
358 struct w5300_priv *priv = netdev_priv(ndev);
359
360 netif_stop_queue(ndev);
361
362 w5300_write_frame(priv, skb->data, skb->len);
363 ndev->stats.tx_packets++;
364 ndev->stats.tx_bytes += skb->len;
365 dev_kfree_skb(skb);
366 netif_dbg(priv, tx_queued, ndev, "tx queued\n");
367
368 w5300_command(priv, S0_CR_SEND);
369
370 return NETDEV_TX_OK;
371}
372
373static int w5300_napi_poll(struct napi_struct *napi, int budget)
374{
375 struct w5300_priv *priv = container_of(napi, struct w5300_priv, napi);
376 struct net_device *ndev = priv->ndev;
377 struct sk_buff *skb;
378 int rx_count;
379 u16 rx_len;
380
381 for (rx_count = 0; rx_count < budget; rx_count++) {
382 u32 rx_fifo_len = w5300_read32(priv, W5300_S0_RX_RSR);
383 if (rx_fifo_len == 0)
384 break;
385
386 rx_len = w5300_read(priv, W5300_S0_RX_FIFO);
387
388 skb = netdev_alloc_skb_ip_align(ndev, roundup(rx_len, 2));
389 if (unlikely(!skb)) {
390 u32 i;
391 for (i = 0; i < rx_fifo_len; i += 2)
392 w5300_read(priv, W5300_S0_RX_FIFO);
393 ndev->stats.rx_dropped++;
394 return -ENOMEM;
395 }
396
397 skb_put(skb, rx_len);
398 w5300_read_frame(priv, skb->data, rx_len);
399 skb->protocol = eth_type_trans(skb, ndev);
400
401 netif_receive_skb(skb);
402 ndev->stats.rx_packets++;
403 ndev->stats.rx_bytes += rx_len;
404 }
405
406 if (rx_count < budget) {
407 napi_complete_done(napi, rx_count);
408 w5300_write(priv, W5300_IMR, IR_S0);
409 }
410
411 return rx_count;
412}
413
414static irqreturn_t w5300_interrupt(int irq, void *ndev_instance)
415{
416 struct net_device *ndev = ndev_instance;
417 struct w5300_priv *priv = netdev_priv(ndev);
418
419 int ir = w5300_read(priv, W5300_S0_IR);
420 if (!ir)
421 return IRQ_NONE;
422 w5300_write(priv, W5300_S0_IR, ir);
423
424 if (ir & S0_IR_SENDOK) {
425 netif_dbg(priv, tx_done, ndev, "tx done\n");
426 netif_wake_queue(ndev);
427 }
428
429 if (ir & S0_IR_RECV) {
430 if (napi_schedule_prep(&priv->napi)) {
431 w5300_write(priv, W5300_IMR, 0);
432 __napi_schedule(&priv->napi);
433 }
434 }
435
436 return IRQ_HANDLED;
437}
438
439static irqreturn_t w5300_detect_link(int irq, void *ndev_instance)
440{
441 struct net_device *ndev = ndev_instance;
442 struct w5300_priv *priv = netdev_priv(ndev);
443
444 if (netif_running(ndev)) {
445 if (gpio_get_value(priv->link_gpio) != 0) {
446 netif_info(priv, link, ndev, "link is up\n");
447 netif_carrier_on(ndev);
448 } else {
449 netif_info(priv, link, ndev, "link is down\n");
450 netif_carrier_off(ndev);
451 }
452 }
453
454 return IRQ_HANDLED;
455}
456
457static void w5300_set_rx_mode(struct net_device *ndev)
458{
459 struct w5300_priv *priv = netdev_priv(ndev);
460 bool set_promisc = (ndev->flags & IFF_PROMISC) != 0;
461
462 if (priv->promisc != set_promisc) {
463 priv->promisc = set_promisc;
464 w5300_hw_start(priv);
465 }
466}
467
468static int w5300_set_macaddr(struct net_device *ndev, void *addr)
469{
470 struct w5300_priv *priv = netdev_priv(ndev);
471 struct sockaddr *sock_addr = addr;
472
473 if (!is_valid_ether_addr(sock_addr->sa_data))
474 return -EADDRNOTAVAIL;
475 eth_hw_addr_set(ndev, sock_addr->sa_data);
476 w5300_write_macaddr(priv);
477 return 0;
478}
479
480static int w5300_open(struct net_device *ndev)
481{
482 struct w5300_priv *priv = netdev_priv(ndev);
483
484 netif_info(priv, ifup, ndev, "enabling\n");
485 w5300_hw_start(priv);
486 napi_enable(&priv->napi);
487 netif_start_queue(ndev);
488 if (!gpio_is_valid(priv->link_gpio) ||
489 gpio_get_value(priv->link_gpio) != 0)
490 netif_carrier_on(ndev);
491 return 0;
492}
493
494static int w5300_stop(struct net_device *ndev)
495{
496 struct w5300_priv *priv = netdev_priv(ndev);
497
498 netif_info(priv, ifdown, ndev, "shutting down\n");
499 w5300_hw_close(priv);
500 netif_carrier_off(ndev);
501 netif_stop_queue(ndev);
502 napi_disable(&priv->napi);
503 return 0;
504}
505
506static const struct ethtool_ops w5300_ethtool_ops = {
507 .get_drvinfo = w5300_get_drvinfo,
508 .get_msglevel = w5300_get_msglevel,
509 .set_msglevel = w5300_set_msglevel,
510 .get_link = w5300_get_link,
511 .get_regs_len = w5300_get_regs_len,
512 .get_regs = w5300_get_regs,
513};
514
515static const struct net_device_ops w5300_netdev_ops = {
516 .ndo_open = w5300_open,
517 .ndo_stop = w5300_stop,
518 .ndo_start_xmit = w5300_start_tx,
519 .ndo_tx_timeout = w5300_tx_timeout,
520 .ndo_set_rx_mode = w5300_set_rx_mode,
521 .ndo_set_mac_address = w5300_set_macaddr,
522 .ndo_validate_addr = eth_validate_addr,
523};
524
525static int w5300_hw_probe(struct platform_device *pdev)
526{
527 struct wiznet_platform_data *data = dev_get_platdata(&pdev->dev);
528 struct net_device *ndev = platform_get_drvdata(pdev);
529 struct w5300_priv *priv = netdev_priv(ndev);
530 const char *name = netdev_name(ndev);
531 struct resource *mem;
532 int mem_size;
533 int irq;
534 int ret;
535
536 if (data && is_valid_ether_addr(data->mac_addr)) {
537 eth_hw_addr_set(ndev, data->mac_addr);
538 } else {
539 eth_hw_addr_random(ndev);
540 }
541
542 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
543 priv->base = devm_ioremap_resource(&pdev->dev, mem);
544 if (IS_ERR(priv->base))
545 return PTR_ERR(priv->base);
546
547 mem_size = resource_size(mem);
548
549 spin_lock_init(&priv->reg_lock);
550 priv->indirect = mem_size < W5300_BUS_DIRECT_SIZE;
551 if (priv->indirect) {
552 priv->read = w5300_read_indirect;
553 priv->write = w5300_write_indirect;
554 } else {
555 priv->read = w5300_read_direct;
556 priv->write = w5300_write_direct;
557 }
558
559 w5300_hw_reset(priv);
560 if (w5300_read(priv, W5300_IDR) != IDR_W5300)
561 return -ENODEV;
562
563 irq = platform_get_irq(pdev, 0);
564 if (irq < 0)
565 return irq;
566 ret = request_irq(irq, w5300_interrupt,
567 IRQ_TYPE_LEVEL_LOW, name, ndev);
568 if (ret < 0)
569 return ret;
570 priv->irq = irq;
571
572 priv->link_gpio = data ? data->link_gpio : -EINVAL;
573 if (gpio_is_valid(priv->link_gpio)) {
574 char *link_name = devm_kzalloc(&pdev->dev, 16, GFP_KERNEL);
575 if (!link_name)
576 return -ENOMEM;
577 snprintf(link_name, 16, "%s-link", name);
578 priv->link_irq = gpio_to_irq(priv->link_gpio);
579 if (request_any_context_irq(priv->link_irq, w5300_detect_link,
580 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
581 link_name, priv->ndev) < 0)
582 priv->link_gpio = -EINVAL;
583 }
584
585 netdev_info(ndev, "at 0x%llx irq %d\n", (u64)mem->start, irq);
586 return 0;
587}
588
589static int w5300_probe(struct platform_device *pdev)
590{
591 struct w5300_priv *priv;
592 struct net_device *ndev;
593 int err;
594
595 ndev = alloc_etherdev(sizeof(*priv));
596 if (!ndev)
597 return -ENOMEM;
598 SET_NETDEV_DEV(ndev, &pdev->dev);
599 platform_set_drvdata(pdev, ndev);
600 priv = netdev_priv(ndev);
601 priv->ndev = ndev;
602
603 ndev->netdev_ops = &w5300_netdev_ops;
604 ndev->ethtool_ops = &w5300_ethtool_ops;
605 ndev->watchdog_timeo = HZ;
606 netif_napi_add_weight(ndev, &priv->napi, w5300_napi_poll, 16);
607
608 /* This chip doesn't support VLAN packets with normal MTU,
609 * so disable VLAN for this device.
610 */
611 ndev->features |= NETIF_F_VLAN_CHALLENGED;
612
613 err = register_netdev(ndev);
614 if (err < 0)
615 goto err_register;
616
617 err = w5300_hw_probe(pdev);
618 if (err < 0)
619 goto err_hw_probe;
620
621 return 0;
622
623err_hw_probe:
624 unregister_netdev(ndev);
625err_register:
626 free_netdev(ndev);
627 return err;
628}
629
630static void w5300_remove(struct platform_device *pdev)
631{
632 struct net_device *ndev = platform_get_drvdata(pdev);
633 struct w5300_priv *priv = netdev_priv(ndev);
634
635 w5300_hw_reset(priv);
636 free_irq(priv->irq, ndev);
637 if (gpio_is_valid(priv->link_gpio))
638 free_irq(priv->link_irq, ndev);
639
640 unregister_netdev(ndev);
641 free_netdev(ndev);
642}
643
644#ifdef CONFIG_PM_SLEEP
645static int w5300_suspend(struct device *dev)
646{
647 struct net_device *ndev = dev_get_drvdata(dev);
648 struct w5300_priv *priv = netdev_priv(ndev);
649
650 if (netif_running(ndev)) {
651 netif_carrier_off(ndev);
652 netif_device_detach(ndev);
653
654 w5300_hw_close(priv);
655 }
656 return 0;
657}
658
659static int w5300_resume(struct device *dev)
660{
661 struct net_device *ndev = dev_get_drvdata(dev);
662 struct w5300_priv *priv = netdev_priv(ndev);
663
664 if (!netif_running(ndev)) {
665 w5300_hw_reset(priv);
666 w5300_hw_start(priv);
667
668 netif_device_attach(ndev);
669 if (!gpio_is_valid(priv->link_gpio) ||
670 gpio_get_value(priv->link_gpio) != 0)
671 netif_carrier_on(ndev);
672 }
673 return 0;
674}
675#endif /* CONFIG_PM_SLEEP */
676
677static SIMPLE_DEV_PM_OPS(w5300_pm_ops, w5300_suspend, w5300_resume);
678
679static struct platform_driver w5300_driver = {
680 .driver = {
681 .name = DRV_NAME,
682 .pm = &w5300_pm_ops,
683 },
684 .probe = w5300_probe,
685 .remove_new = w5300_remove,
686};
687
688module_platform_driver(w5300_driver);
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
34MODULE_DESCRIPTION("WIZnet W5300 Ethernet driver v"DRV_VERSION);
35MODULE_AUTHOR("Mike Sinkovsky <msink@permonline.ru>");
36MODULE_ALIAS("platform:"DRV_NAME);
37MODULE_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 (promiscuous) */
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 */
88struct 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 */
116static inline u16 w5300_read_direct(struct w5300_priv *priv, u16 addr)
117{
118 return ioread16(priv->base + (addr << CONFIG_WIZNET_BUS_SHIFT));
119}
120
121static 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
138static 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
152static 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
177static 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
185static 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
191static 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
207static 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
221static 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
234static 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
248static 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
271static 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
282static 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
295static 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
304static 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
314static 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
321static 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
328static int w5300_get_regs_len(struct net_device *ndev)
329{
330 return W5300_REGS_LEN;
331}
332
333static 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
357static 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
369static 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
387static 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 napi_complete(napi);
422 w5300_write(priv, W5300_IMR, IR_S0);
423 mmiowb();
424 }
425
426 return rx_count;
427}
428
429static 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
456static 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
474static 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
485static 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
497static 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
511static 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
523static 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
532static 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
543static 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 priv->base = devm_ioremap_resource(&pdev->dev, mem);
562 if (IS_ERR(priv->base))
563 return PTR_ERR(priv->base);
564
565 mem_size = resource_size(mem);
566
567 spin_lock_init(&priv->reg_lock);
568 priv->indirect = mem_size < W5300_BUS_DIRECT_SIZE;
569 if (priv->indirect) {
570 priv->read = w5300_read_indirect;
571 priv->write = w5300_write_indirect;
572 } else {
573 priv->read = w5300_read_direct;
574 priv->write = w5300_write_direct;
575 }
576
577 w5300_hw_reset(priv);
578 if (w5300_read(priv, W5300_IDR) != IDR_W5300)
579 return -ENODEV;
580
581 irq = platform_get_irq(pdev, 0);
582 if (irq < 0)
583 return irq;
584 ret = request_irq(irq, w5300_interrupt,
585 IRQ_TYPE_LEVEL_LOW, name, ndev);
586 if (ret < 0)
587 return ret;
588 priv->irq = irq;
589
590 priv->link_gpio = data ? data->link_gpio : -EINVAL;
591 if (gpio_is_valid(priv->link_gpio)) {
592 char *link_name = devm_kzalloc(&pdev->dev, 16, GFP_KERNEL);
593 if (!link_name)
594 return -ENOMEM;
595 snprintf(link_name, 16, "%s-link", name);
596 priv->link_irq = gpio_to_irq(priv->link_gpio);
597 if (request_any_context_irq(priv->link_irq, w5300_detect_link,
598 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
599 link_name, priv->ndev) < 0)
600 priv->link_gpio = -EINVAL;
601 }
602
603 netdev_info(ndev, "at 0x%llx irq %d\n", (u64)mem->start, irq);
604 return 0;
605}
606
607static int w5300_probe(struct platform_device *pdev)
608{
609 struct w5300_priv *priv;
610 struct net_device *ndev;
611 int err;
612
613 ndev = alloc_etherdev(sizeof(*priv));
614 if (!ndev)
615 return -ENOMEM;
616 SET_NETDEV_DEV(ndev, &pdev->dev);
617 platform_set_drvdata(pdev, ndev);
618 priv = netdev_priv(ndev);
619 priv->ndev = ndev;
620
621 ndev->netdev_ops = &w5300_netdev_ops;
622 ndev->ethtool_ops = &w5300_ethtool_ops;
623 ndev->watchdog_timeo = HZ;
624 netif_napi_add(ndev, &priv->napi, w5300_napi_poll, 16);
625
626 /* This chip doesn't support VLAN packets with normal MTU,
627 * so disable VLAN for this device.
628 */
629 ndev->features |= NETIF_F_VLAN_CHALLENGED;
630
631 err = register_netdev(ndev);
632 if (err < 0)
633 goto err_register;
634
635 err = w5300_hw_probe(pdev);
636 if (err < 0)
637 goto err_hw_probe;
638
639 return 0;
640
641err_hw_probe:
642 unregister_netdev(ndev);
643err_register:
644 free_netdev(ndev);
645 return err;
646}
647
648static int w5300_remove(struct platform_device *pdev)
649{
650 struct net_device *ndev = platform_get_drvdata(pdev);
651 struct w5300_priv *priv = netdev_priv(ndev);
652
653 w5300_hw_reset(priv);
654 free_irq(priv->irq, ndev);
655 if (gpio_is_valid(priv->link_gpio))
656 free_irq(priv->link_irq, ndev);
657
658 unregister_netdev(ndev);
659 free_netdev(ndev);
660 return 0;
661}
662
663#ifdef CONFIG_PM_SLEEP
664static int w5300_suspend(struct device *dev)
665{
666 struct platform_device *pdev = to_platform_device(dev);
667 struct net_device *ndev = platform_get_drvdata(pdev);
668 struct w5300_priv *priv = netdev_priv(ndev);
669
670 if (netif_running(ndev)) {
671 netif_carrier_off(ndev);
672 netif_device_detach(ndev);
673
674 w5300_hw_close(priv);
675 }
676 return 0;
677}
678
679static int w5300_resume(struct device *dev)
680{
681 struct platform_device *pdev = to_platform_device(dev);
682 struct net_device *ndev = platform_get_drvdata(pdev);
683 struct w5300_priv *priv = netdev_priv(ndev);
684
685 if (!netif_running(ndev)) {
686 w5300_hw_reset(priv);
687 w5300_hw_start(priv);
688
689 netif_device_attach(ndev);
690 if (!gpio_is_valid(priv->link_gpio) ||
691 gpio_get_value(priv->link_gpio) != 0)
692 netif_carrier_on(ndev);
693 }
694 return 0;
695}
696#endif /* CONFIG_PM_SLEEP */
697
698static SIMPLE_DEV_PM_OPS(w5300_pm_ops, w5300_suspend, w5300_resume);
699
700static struct platform_driver w5300_driver = {
701 .driver = {
702 .name = DRV_NAME,
703 .pm = &w5300_pm_ops,
704 },
705 .probe = w5300_probe,
706 .remove = w5300_remove,
707};
708
709module_platform_driver(w5300_driver);