This source file includes following definitions.
- w5300_read_direct
- w5300_write_direct
- w5300_read_indirect
- w5300_write_indirect
- w5300_read32
- w5300_write32
- w5300_command
- w5300_read_frame
- w5300_write_frame
- w5300_write_macaddr
- w5300_hw_reset
- w5300_hw_start
- w5300_hw_close
- w5300_get_drvinfo
- w5300_get_link
- w5300_get_msglevel
- w5300_set_msglevel
- w5300_get_regs_len
- w5300_get_regs
- w5300_tx_timeout
- w5300_start_tx
- w5300_napi_poll
- w5300_interrupt
- w5300_detect_link
- w5300_set_rx_mode
- w5300_set_macaddr
- w5300_open
- w5300_stop
- w5300_hw_probe
- w5300_probe
- w5300_remove
- w5300_suspend
- w5300_resume
1
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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
32 MODULE_DESCRIPTION("WIZnet W5300 Ethernet driver v"DRV_VERSION);
33 MODULE_AUTHOR("Mike Sinkovsky <msink@permonline.ru>");
34 MODULE_ALIAS("platform:"DRV_NAME);
35 MODULE_LICENSE("GPL");
36
37
38
39
40 #define W5300_MR 0x0000
41 #define MR_DBW (1 << 15)
42 #define MR_MPF (1 << 14)
43 #define MR_WDF(n) (((n)&7)<<11)
44 #define MR_RDH (1 << 10)
45 #define MR_FS (1 << 8)
46 #define MR_RST (1 << 7)
47 #define MR_PB (1 << 4)
48 #define MR_DBS (1 << 2)
49 #define MR_IND (1 << 0)
50 #define W5300_IR 0x0002
51 #define W5300_IMR 0x0004
52 #define IR_S0 0x0001
53 #define W5300_SHARL 0x0008
54 #define W5300_SHARH 0x000c
55 #define W5300_TMSRL 0x0020
56 #define W5300_TMSRH 0x0024
57 #define W5300_RMSRL 0x0028
58 #define W5300_RMSRH 0x002c
59 #define W5300_MTYPE 0x0030
60 #define W5300_IDR 0x00fe
61 #define IDR_W5300 0x5300
62 #define W5300_S0_MR 0x0200
63 #define S0_MR_CLOSED 0x0000
64 #define S0_MR_MACRAW 0x0004
65 #define S0_MR_MACRAW_MF 0x0044
66 #define W5300_S0_CR 0x0202
67 #define S0_CR_OPEN 0x0001
68 #define S0_CR_CLOSE 0x0010
69 #define S0_CR_SEND 0x0020
70 #define S0_CR_RECV 0x0040
71 #define W5300_S0_IMR 0x0204
72 #define W5300_S0_IR 0x0206
73 #define S0_IR_RECV 0x0004
74 #define S0_IR_SENDOK 0x0010
75 #define W5300_S0_SSR 0x0208
76 #define W5300_S0_TX_WRSR 0x0220
77 #define W5300_S0_TX_FSR 0x0224
78 #define W5300_S0_RX_RSR 0x0228
79 #define W5300_S0_TX_FIFO 0x022e
80 #define W5300_S0_RX_FIFO 0x0230
81 #define W5300_REGS_LEN 0x0400
82
83
84
85
86 struct 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
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105
106
107
108
109
110
111
112
113
114 static inline u16 w5300_read_direct(struct w5300_priv *priv, u16 addr)
115 {
116 return ioread16(priv->base + (addr << CONFIG_WIZNET_BUS_SHIFT));
117 }
118
119 static 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
127
128
129
130
131
132
133 #define W5300_IDM_AR 0x0002
134 #define W5300_IDM_DR 0x0004
135
136 static 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
149 static 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
168 #define w5300_read priv->read
169 #define w5300_write priv->write
170 #endif
171
172 static 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
180 static 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
186 static 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
201 static 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
215 static 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
228 static 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
241 static 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
252
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
261 static 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
270 static 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
279
280
281
282 static void w5300_get_drvinfo(struct net_device *ndev,
283 struct ethtool_drvinfo *info)
284 {
285 strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
286 strlcpy(info->version, DRV_VERSION, sizeof(info->version));
287 strlcpy(info->bus_info, dev_name(ndev->dev.parent),
288 sizeof(info->bus_info));
289 }
290
291 static 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
301 static 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
308 static 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
315 static int w5300_get_regs_len(struct net_device *ndev)
316 {
317 return W5300_REGS_LEN;
318 }
319
320 static 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:
332 case W5300_S0_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
344 static void w5300_tx_timeout(struct net_device *ndev)
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
356 static 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
373 static 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
414 static 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
439 static 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
457 static 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
468 static 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 memcpy(ndev->dev_addr, sock_addr->sa_data, ETH_ALEN);
476 w5300_write_macaddr(priv);
477 return 0;
478 }
479
480 static 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
494 static 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
506 static 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
515 static 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
525 static 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 memcpy(ndev->dev_addr, data->mac_addr, ETH_ALEN);
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
589 static 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(ndev, &priv->napi, w5300_napi_poll, 16);
607
608
609
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
623 err_hw_probe:
624 unregister_netdev(ndev);
625 err_register:
626 free_netdev(ndev);
627 return err;
628 }
629
630 static int 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 return 0;
643 }
644
645 #ifdef CONFIG_PM_SLEEP
646 static int w5300_suspend(struct device *dev)
647 {
648 struct net_device *ndev = dev_get_drvdata(dev);
649 struct w5300_priv *priv = netdev_priv(ndev);
650
651 if (netif_running(ndev)) {
652 netif_carrier_off(ndev);
653 netif_device_detach(ndev);
654
655 w5300_hw_close(priv);
656 }
657 return 0;
658 }
659
660 static int w5300_resume(struct device *dev)
661 {
662 struct net_device *ndev = dev_get_drvdata(dev);
663 struct w5300_priv *priv = netdev_priv(ndev);
664
665 if (!netif_running(ndev)) {
666 w5300_hw_reset(priv);
667 w5300_hw_start(priv);
668
669 netif_device_attach(ndev);
670 if (!gpio_is_valid(priv->link_gpio) ||
671 gpio_get_value(priv->link_gpio) != 0)
672 netif_carrier_on(ndev);
673 }
674 return 0;
675 }
676 #endif
677
678 static SIMPLE_DEV_PM_OPS(w5300_pm_ops, w5300_suspend, w5300_resume);
679
680 static struct platform_driver w5300_driver = {
681 .driver = {
682 .name = DRV_NAME,
683 .pm = &w5300_pm_ops,
684 },
685 .probe = w5300_probe,
686 .remove = w5300_remove,
687 };
688
689 module_platform_driver(w5300_driver);