Version:  2.0.40 2.2.26 2.4.37 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10

Linux/drivers/net/ethernet/wiznet/w5300.c

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

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us