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/usb/pegasus.c

  1 /*
  2  *  Copyright (c) 1999-2013 Petko Manolov (petkan@nucleusys.com)
  3  *
  4  * This program is free software; you can redistribute it and/or modify
  5  * it under the terms of the GNU General Public License version 2 as
  6  * published by the Free Software Foundation.
  7  *
  8  *      ChangeLog:
  9  *              ....    Most of the time spent on reading sources & docs.
 10  *              v0.2.x  First official release for the Linux kernel.
 11  *              v0.3.0  Beutified and structured, some bugs fixed.
 12  *              v0.3.x  URBifying bulk requests and bugfixing. First relatively
 13  *                      stable release. Still can touch device's registers only
 14  *                      from top-halves.
 15  *              v0.4.0  Control messages remained unurbified are now URBs.
 16  *                      Now we can touch the HW at any time.
 17  *              v0.4.9  Control urbs again use process context to wait. Argh...
 18  *                      Some long standing bugs (enable_net_traffic) fixed.
 19  *                      Also nasty trick about resubmiting control urb from
 20  *                      interrupt context used. Please let me know how it
 21  *                      behaves. Pegasus II support added since this version.
 22  *                      TODO: suppressing HCD warnings spewage on disconnect.
 23  *              v0.4.13 Ethernet address is now set at probe(), not at open()
 24  *                      time as this seems to break dhcpd.
 25  *              v0.5.0  branch to 2.5.x kernels
 26  *              v0.5.1  ethtool support added
 27  *              v0.5.5  rx socket buffers are in a pool and the their allocation
 28  *                      is out of the interrupt routine.
 29  *              ...
 30  *              v0.9.3  simplified [get|set]_register(s), async update registers
 31  *                      logic revisited, receive skb_pool removed.
 32  */
 33 
 34 #include <linux/sched.h>
 35 #include <linux/slab.h>
 36 #include <linux/init.h>
 37 #include <linux/delay.h>
 38 #include <linux/netdevice.h>
 39 #include <linux/etherdevice.h>
 40 #include <linux/ethtool.h>
 41 #include <linux/mii.h>
 42 #include <linux/usb.h>
 43 #include <linux/module.h>
 44 #include <asm/byteorder.h>
 45 #include <linux/uaccess.h>
 46 #include "pegasus.h"
 47 
 48 /*
 49  * Version Information
 50  */
 51 #define DRIVER_VERSION "v0.9.3 (2013/04/25)"
 52 #define DRIVER_AUTHOR "Petko Manolov <petkan@nucleusys.com>"
 53 #define DRIVER_DESC "Pegasus/Pegasus II USB Ethernet driver"
 54 
 55 static const char driver_name[] = "pegasus";
 56 
 57 #undef  PEGASUS_WRITE_EEPROM
 58 #define BMSR_MEDIA      (BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | \
 59                         BMSR_100FULL | BMSR_ANEGCAPABLE)
 60 
 61 static bool loopback;
 62 static bool mii_mode;
 63 static char *devid;
 64 
 65 static struct usb_eth_dev usb_dev_id[] = {
 66 #define PEGASUS_DEV(pn, vid, pid, flags)        \
 67         {.name = pn, .vendor = vid, .device = pid, .private = flags},
 68 #define PEGASUS_DEV_CLASS(pn, vid, pid, dclass, flags) \
 69         PEGASUS_DEV(pn, vid, pid, flags)
 70 #include "pegasus.h"
 71 #undef  PEGASUS_DEV
 72 #undef  PEGASUS_DEV_CLASS
 73         {NULL, 0, 0, 0},
 74         {NULL, 0, 0, 0}
 75 };
 76 
 77 static struct usb_device_id pegasus_ids[] = {
 78 #define PEGASUS_DEV(pn, vid, pid, flags) \
 79         {.match_flags = USB_DEVICE_ID_MATCH_DEVICE, .idVendor = vid, .idProduct = pid},
 80 /*
 81  * The Belkin F8T012xx1 bluetooth adaptor has the same vendor and product
 82  * IDs as the Belkin F5D5050, so we need to teach the pegasus driver to
 83  * ignore adaptors belonging to the "Wireless" class 0xE0. For this one
 84  * case anyway, seeing as the pegasus is for "Wired" adaptors.
 85  */
 86 #define PEGASUS_DEV_CLASS(pn, vid, pid, dclass, flags) \
 87         {.match_flags = (USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_DEV_CLASS), \
 88         .idVendor = vid, .idProduct = pid, .bDeviceClass = dclass},
 89 #include "pegasus.h"
 90 #undef  PEGASUS_DEV
 91 #undef  PEGASUS_DEV_CLASS
 92         {},
 93         {}
 94 };
 95 
 96 MODULE_AUTHOR(DRIVER_AUTHOR);
 97 MODULE_DESCRIPTION(DRIVER_DESC);
 98 MODULE_LICENSE("GPL");
 99 module_param(loopback, bool, 0);
100 module_param(mii_mode, bool, 0);
101 module_param(devid, charp, 0);
102 MODULE_PARM_DESC(loopback, "Enable MAC loopback mode (bit 0)");
103 MODULE_PARM_DESC(mii_mode, "Enable HomePNA mode (bit 0),default=MII mode = 0");
104 MODULE_PARM_DESC(devid, "The format is: 'DEV_name:VendorID:DeviceID:Flags'");
105 
106 /* use ethtool to change the level for any given device */
107 static int msg_level = -1;
108 module_param(msg_level, int, 0);
109 MODULE_PARM_DESC(msg_level, "Override default message level");
110 
111 MODULE_DEVICE_TABLE(usb, pegasus_ids);
112 static const struct net_device_ops pegasus_netdev_ops;
113 
114 /*****/
115 
116 static void async_ctrl_callback(struct urb *urb)
117 {
118         struct usb_ctrlrequest *req = (struct usb_ctrlrequest *)urb->context;
119         int status = urb->status;
120 
121         if (status < 0)
122                 dev_dbg(&urb->dev->dev, "%s failed with %d", __func__, status);
123         kfree(req);
124         usb_free_urb(urb);
125 }
126 
127 static int get_registers(pegasus_t *pegasus, __u16 indx, __u16 size, void *data)
128 {
129         u8 *buf;
130         int ret;
131 
132         buf = kmalloc(size, GFP_NOIO);
133         if (!buf)
134                 return -ENOMEM;
135 
136         ret = usb_control_msg(pegasus->usb, usb_rcvctrlpipe(pegasus->usb, 0),
137                               PEGASUS_REQ_GET_REGS, PEGASUS_REQT_READ, 0,
138                               indx, buf, size, 1000);
139         if (ret < 0)
140                 netif_dbg(pegasus, drv, pegasus->net,
141                           "%s returned %d\n", __func__, ret);
142         else if (ret <= size)
143                 memcpy(data, buf, ret);
144         kfree(buf);
145         return ret;
146 }
147 
148 static int set_registers(pegasus_t *pegasus, __u16 indx, __u16 size,
149                          const void *data)
150 {
151         u8 *buf;
152         int ret;
153 
154         buf = kmemdup(data, size, GFP_NOIO);
155         if (!buf)
156                 return -ENOMEM;
157 
158         ret = usb_control_msg(pegasus->usb, usb_sndctrlpipe(pegasus->usb, 0),
159                               PEGASUS_REQ_SET_REGS, PEGASUS_REQT_WRITE, 0,
160                               indx, buf, size, 100);
161         if (ret < 0)
162                 netif_dbg(pegasus, drv, pegasus->net,
163                           "%s returned %d\n", __func__, ret);
164         kfree(buf);
165         return ret;
166 }
167 
168 static int set_register(pegasus_t *pegasus, __u16 indx, __u8 data)
169 {
170         u8 *buf;
171         int ret;
172 
173         buf = kmemdup(&data, 1, GFP_NOIO);
174         if (!buf)
175                 return -ENOMEM;
176 
177         ret = usb_control_msg(pegasus->usb, usb_sndctrlpipe(pegasus->usb, 0),
178                               PEGASUS_REQ_SET_REG, PEGASUS_REQT_WRITE, data,
179                               indx, buf, 1, 1000);
180         if (ret < 0)
181                 netif_dbg(pegasus, drv, pegasus->net,
182                           "%s returned %d\n", __func__, ret);
183         kfree(buf);
184         return ret;
185 }
186 
187 static int update_eth_regs_async(pegasus_t *pegasus)
188 {
189         int ret = -ENOMEM;
190         struct urb *async_urb;
191         struct usb_ctrlrequest *req;
192 
193         req = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
194         if (req == NULL)
195                 return ret;
196 
197         async_urb = usb_alloc_urb(0, GFP_ATOMIC);
198         if (async_urb == NULL) {
199                 kfree(req);
200                 return ret;
201         }
202         req->bRequestType = PEGASUS_REQT_WRITE;
203         req->bRequest = PEGASUS_REQ_SET_REGS;
204         req->wValue = cpu_to_le16(0);
205         req->wIndex = cpu_to_le16(EthCtrl0);
206         req->wLength = cpu_to_le16(3);
207 
208         usb_fill_control_urb(async_urb, pegasus->usb,
209                              usb_sndctrlpipe(pegasus->usb, 0), (void *)req,
210                              pegasus->eth_regs, 3, async_ctrl_callback, req);
211 
212         ret = usb_submit_urb(async_urb, GFP_ATOMIC);
213         if (ret) {
214                 if (ret == -ENODEV)
215                         netif_device_detach(pegasus->net);
216                 netif_err(pegasus, drv, pegasus->net,
217                           "%s returned %d\n", __func__, ret);
218         }
219         return ret;
220 }
221 
222 static int __mii_op(pegasus_t *p, __u8 phy, __u8 indx, __u16 *regd, __u8 cmd)
223 {
224         int i;
225         __u8 data[4] = { phy, 0, 0, indx };
226         __le16 regdi;
227         int ret = -ETIMEDOUT;
228 
229         if (cmd & PHY_WRITE) {
230                 __le16 *t = (__le16 *) & data[1];
231                 *t = cpu_to_le16(*regd);
232         }
233         set_register(p, PhyCtrl, 0);
234         set_registers(p, PhyAddr, sizeof(data), data);
235         set_register(p, PhyCtrl, (indx | cmd));
236         for (i = 0; i < REG_TIMEOUT; i++) {
237                 ret = get_registers(p, PhyCtrl, 1, data);
238                 if (ret < 0)
239                         goto fail;
240                 if (data[0] & PHY_DONE)
241                         break;
242         }
243         if (i >= REG_TIMEOUT)
244                 goto fail;
245         if (cmd & PHY_READ) {
246                 ret = get_registers(p, PhyData, 2, &regdi);
247                 *regd = le16_to_cpu(regdi);
248                 return ret;
249         }
250         return 0;
251 fail:
252         netif_dbg(p, drv, p->net, "%s failed\n", __func__);
253         return ret;
254 }
255 
256 /* Returns non-negative int on success, error on failure */
257 static int read_mii_word(pegasus_t *pegasus, __u8 phy, __u8 indx, __u16 *regd)
258 {
259         return __mii_op(pegasus, phy, indx, regd, PHY_READ);
260 }
261 
262 /* Returns zero on success, error on failure */
263 static int write_mii_word(pegasus_t *pegasus, __u8 phy, __u8 indx, __u16 *regd)
264 {
265         return __mii_op(pegasus, phy, indx, regd, PHY_WRITE);
266 }
267 
268 static int mdio_read(struct net_device *dev, int phy_id, int loc)
269 {
270         pegasus_t *pegasus = netdev_priv(dev);
271         u16 res;
272 
273         read_mii_word(pegasus, phy_id, loc, &res);
274         return (int)res;
275 }
276 
277 static void mdio_write(struct net_device *dev, int phy_id, int loc, int val)
278 {
279         pegasus_t *pegasus = netdev_priv(dev);
280         u16 data = val;
281 
282         write_mii_word(pegasus, phy_id, loc, &data);
283 }
284 
285 static int read_eprom_word(pegasus_t *pegasus, __u8 index, __u16 *retdata)
286 {
287         int i;
288         __u8 tmp;
289         __le16 retdatai;
290         int ret;
291 
292         set_register(pegasus, EpromCtrl, 0);
293         set_register(pegasus, EpromOffset, index);
294         set_register(pegasus, EpromCtrl, EPROM_READ);
295 
296         for (i = 0; i < REG_TIMEOUT; i++) {
297                 ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
298                 if (tmp & EPROM_DONE)
299                         break;
300                 if (ret == -ESHUTDOWN)
301                         goto fail;
302         }
303         if (i >= REG_TIMEOUT)
304                 goto fail;
305 
306         ret = get_registers(pegasus, EpromData, 2, &retdatai);
307         *retdata = le16_to_cpu(retdatai);
308         return ret;
309 
310 fail:
311         netif_warn(pegasus, drv, pegasus->net, "%s failed\n", __func__);
312         return -ETIMEDOUT;
313 }
314 
315 #ifdef  PEGASUS_WRITE_EEPROM
316 static inline void enable_eprom_write(pegasus_t *pegasus)
317 {
318         __u8 tmp;
319 
320         get_registers(pegasus, EthCtrl2, 1, &tmp);
321         set_register(pegasus, EthCtrl2, tmp | EPROM_WR_ENABLE);
322 }
323 
324 static inline void disable_eprom_write(pegasus_t *pegasus)
325 {
326         __u8 tmp;
327 
328         get_registers(pegasus, EthCtrl2, 1, &tmp);
329         set_register(pegasus, EpromCtrl, 0);
330         set_register(pegasus, EthCtrl2, tmp & ~EPROM_WR_ENABLE);
331 }
332 
333 static int write_eprom_word(pegasus_t *pegasus, __u8 index, __u16 data)
334 {
335         int i;
336         __u8 tmp, d[4] = { 0x3f, 0, 0, EPROM_WRITE };
337         int ret;
338         __le16 le_data = cpu_to_le16(data);
339 
340         set_registers(pegasus, EpromOffset, 4, d);
341         enable_eprom_write(pegasus);
342         set_register(pegasus, EpromOffset, index);
343         set_registers(pegasus, EpromData, 2, &le_data);
344         set_register(pegasus, EpromCtrl, EPROM_WRITE);
345 
346         for (i = 0; i < REG_TIMEOUT; i++) {
347                 ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
348                 if (ret == -ESHUTDOWN)
349                         goto fail;
350                 if (tmp & EPROM_DONE)
351                         break;
352         }
353         disable_eprom_write(pegasus);
354         if (i >= REG_TIMEOUT)
355                 goto fail;
356 
357         return ret;
358 
359 fail:
360         netif_warn(pegasus, drv, pegasus->net, "%s failed\n", __func__);
361         return -ETIMEDOUT;
362 }
363 #endif                          /* PEGASUS_WRITE_EEPROM */
364 
365 static inline void get_node_id(pegasus_t *pegasus, __u8 *id)
366 {
367         int i;
368         __u16 w16;
369 
370         for (i = 0; i < 3; i++) {
371                 read_eprom_word(pegasus, i, &w16);
372                 ((__le16 *) id)[i] = cpu_to_le16(w16);
373         }
374 }
375 
376 static void set_ethernet_addr(pegasus_t *pegasus)
377 {
378         __u8 node_id[6];
379 
380         if (pegasus->features & PEGASUS_II) {
381                 get_registers(pegasus, 0x10, sizeof(node_id), node_id);
382         } else {
383                 get_node_id(pegasus, node_id);
384                 set_registers(pegasus, EthID, sizeof(node_id), node_id);
385         }
386         memcpy(pegasus->net->dev_addr, node_id, sizeof(node_id));
387 }
388 
389 static inline int reset_mac(pegasus_t *pegasus)
390 {
391         __u8 data = 0x8;
392         int i;
393 
394         set_register(pegasus, EthCtrl1, data);
395         for (i = 0; i < REG_TIMEOUT; i++) {
396                 get_registers(pegasus, EthCtrl1, 1, &data);
397                 if (~data & 0x08) {
398                         if (loopback)
399                                 break;
400                         if (mii_mode && (pegasus->features & HAS_HOME_PNA))
401                                 set_register(pegasus, Gpio1, 0x34);
402                         else
403                                 set_register(pegasus, Gpio1, 0x26);
404                         set_register(pegasus, Gpio0, pegasus->features);
405                         set_register(pegasus, Gpio0, DEFAULT_GPIO_SET);
406                         break;
407                 }
408         }
409         if (i == REG_TIMEOUT)
410                 return -ETIMEDOUT;
411 
412         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
413             usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
414                 set_register(pegasus, Gpio0, 0x24);
415                 set_register(pegasus, Gpio0, 0x26);
416         }
417         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_ELCON) {
418                 __u16 auxmode;
419                 read_mii_word(pegasus, 3, 0x1b, &auxmode);
420                 auxmode |= 4;
421                 write_mii_word(pegasus, 3, 0x1b, &auxmode);
422         }
423 
424         return 0;
425 }
426 
427 static int enable_net_traffic(struct net_device *dev, struct usb_device *usb)
428 {
429         __u16 linkpart;
430         __u8 data[4];
431         pegasus_t *pegasus = netdev_priv(dev);
432         int ret;
433 
434         read_mii_word(pegasus, pegasus->phy, MII_LPA, &linkpart);
435         data[0] = 0xc8; /* TX & RX enable, append status, no CRC */
436         data[1] = 0;
437         if (linkpart & (ADVERTISE_100FULL | ADVERTISE_10FULL))
438                 data[1] |= 0x20;        /* set full duplex */
439         if (linkpart & (ADVERTISE_100FULL | ADVERTISE_100HALF))
440                 data[1] |= 0x10;        /* set 100 Mbps */
441         if (mii_mode)
442                 data[1] = 0;
443         data[2] = loopback ? 0x09 : 0x01;
444 
445         memcpy(pegasus->eth_regs, data, sizeof(data));
446         ret = set_registers(pegasus, EthCtrl0, 3, data);
447 
448         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
449             usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS2 ||
450             usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
451                 u16 auxmode;
452                 read_mii_word(pegasus, 0, 0x1b, &auxmode);
453                 auxmode |= 4;
454                 write_mii_word(pegasus, 0, 0x1b, &auxmode);
455         }
456 
457         return ret;
458 }
459 
460 static void read_bulk_callback(struct urb *urb)
461 {
462         pegasus_t *pegasus = urb->context;
463         struct net_device *net;
464         int rx_status, count = urb->actual_length;
465         int status = urb->status;
466         u8 *buf = urb->transfer_buffer;
467         __u16 pkt_len;
468 
469         if (!pegasus)
470                 return;
471 
472         net = pegasus->net;
473         if (!netif_device_present(net) || !netif_running(net))
474                 return;
475 
476         switch (status) {
477         case 0:
478                 break;
479         case -ETIME:
480                 netif_dbg(pegasus, rx_err, net, "reset MAC\n");
481                 pegasus->flags &= ~PEGASUS_RX_BUSY;
482                 break;
483         case -EPIPE:            /* stall, or disconnect from TT */
484                 /* FIXME schedule work to clear the halt */
485                 netif_warn(pegasus, rx_err, net, "no rx stall recovery\n");
486                 return;
487         case -ENOENT:
488         case -ECONNRESET:
489         case -ESHUTDOWN:
490                 netif_dbg(pegasus, ifdown, net, "rx unlink, %d\n", status);
491                 return;
492         default:
493                 netif_dbg(pegasus, rx_err, net, "RX status %d\n", status);
494                 goto goon;
495         }
496 
497         if (count < 4)
498                 goto goon;
499 
500         rx_status = buf[count - 2];
501         if (rx_status & 0x1e) {
502                 netif_dbg(pegasus, rx_err, net,
503                           "RX packet error %x\n", rx_status);
504                 pegasus->stats.rx_errors++;
505                 if (rx_status & 0x06)   /* long or runt */
506                         pegasus->stats.rx_length_errors++;
507                 if (rx_status & 0x08)
508                         pegasus->stats.rx_crc_errors++;
509                 if (rx_status & 0x10)   /* extra bits   */
510                         pegasus->stats.rx_frame_errors++;
511                 goto goon;
512         }
513         if (pegasus->chip == 0x8513) {
514                 pkt_len = le32_to_cpu(*(__le32 *)urb->transfer_buffer);
515                 pkt_len &= 0x0fff;
516                 pegasus->rx_skb->data += 2;
517         } else {
518                 pkt_len = buf[count - 3] << 8;
519                 pkt_len += buf[count - 4];
520                 pkt_len &= 0xfff;
521                 pkt_len -= 4;
522         }
523 
524         /*
525          * If the packet is unreasonably long, quietly drop it rather than
526          * kernel panicing by calling skb_put.
527          */
528         if (pkt_len > PEGASUS_MTU)
529                 goto goon;
530 
531         /*
532          * at this point we are sure pegasus->rx_skb != NULL
533          * so we go ahead and pass up the packet.
534          */
535         skb_put(pegasus->rx_skb, pkt_len);
536         pegasus->rx_skb->protocol = eth_type_trans(pegasus->rx_skb, net);
537         netif_rx(pegasus->rx_skb);
538         pegasus->stats.rx_packets++;
539         pegasus->stats.rx_bytes += pkt_len;
540 
541         if (pegasus->flags & PEGASUS_UNPLUG)
542                 return;
543 
544         pegasus->rx_skb = __netdev_alloc_skb_ip_align(pegasus->net, PEGASUS_MTU,
545                                                       GFP_ATOMIC);
546 
547         if (pegasus->rx_skb == NULL)
548                 goto tl_sched;
549 goon:
550         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
551                           usb_rcvbulkpipe(pegasus->usb, 1),
552                           pegasus->rx_skb->data, PEGASUS_MTU,
553                           read_bulk_callback, pegasus);
554         rx_status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);
555         if (rx_status == -ENODEV)
556                 netif_device_detach(pegasus->net);
557         else if (rx_status) {
558                 pegasus->flags |= PEGASUS_RX_URB_FAIL;
559                 goto tl_sched;
560         } else {
561                 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
562         }
563 
564         return;
565 
566 tl_sched:
567         tasklet_schedule(&pegasus->rx_tl);
568 }
569 
570 static void rx_fixup(unsigned long data)
571 {
572         pegasus_t *pegasus;
573         int status;
574 
575         pegasus = (pegasus_t *) data;
576         if (pegasus->flags & PEGASUS_UNPLUG)
577                 return;
578 
579         if (pegasus->flags & PEGASUS_RX_URB_FAIL)
580                 if (pegasus->rx_skb)
581                         goto try_again;
582         if (pegasus->rx_skb == NULL)
583                 pegasus->rx_skb = __netdev_alloc_skb_ip_align(pegasus->net,
584                                                               PEGASUS_MTU,
585                                                               GFP_ATOMIC);
586         if (pegasus->rx_skb == NULL) {
587                 netif_warn(pegasus, rx_err, pegasus->net, "low on memory\n");
588                 tasklet_schedule(&pegasus->rx_tl);
589                 return;
590         }
591         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
592                           usb_rcvbulkpipe(pegasus->usb, 1),
593                           pegasus->rx_skb->data, PEGASUS_MTU,
594                           read_bulk_callback, pegasus);
595 try_again:
596         status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);
597         if (status == -ENODEV)
598                 netif_device_detach(pegasus->net);
599         else if (status) {
600                 pegasus->flags |= PEGASUS_RX_URB_FAIL;
601                 tasklet_schedule(&pegasus->rx_tl);
602         } else {
603                 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
604         }
605 }
606 
607 static void write_bulk_callback(struct urb *urb)
608 {
609         pegasus_t *pegasus = urb->context;
610         struct net_device *net;
611         int status = urb->status;
612 
613         if (!pegasus)
614                 return;
615 
616         net = pegasus->net;
617 
618         if (!netif_device_present(net) || !netif_running(net))
619                 return;
620 
621         switch (status) {
622         case -EPIPE:
623                 /* FIXME schedule_work() to clear the tx halt */
624                 netif_stop_queue(net);
625                 netif_warn(pegasus, tx_err, net, "no tx stall recovery\n");
626                 return;
627         case -ENOENT:
628         case -ECONNRESET:
629         case -ESHUTDOWN:
630                 netif_dbg(pegasus, ifdown, net, "tx unlink, %d\n", status);
631                 return;
632         default:
633                 netif_info(pegasus, tx_err, net, "TX status %d\n", status);
634                 /* FALL THROUGH */
635         case 0:
636                 break;
637         }
638 
639         netif_trans_update(net); /* prevent tx timeout */
640         netif_wake_queue(net);
641 }
642 
643 static void intr_callback(struct urb *urb)
644 {
645         pegasus_t *pegasus = urb->context;
646         struct net_device *net;
647         int res, status = urb->status;
648 
649         if (!pegasus)
650                 return;
651         net = pegasus->net;
652 
653         switch (status) {
654         case 0:
655                 break;
656         case -ECONNRESET:       /* unlink */
657         case -ENOENT:
658         case -ESHUTDOWN:
659                 return;
660         default:
661                 /* some Pegasus-I products report LOTS of data
662                  * toggle errors... avoid log spamming
663                  */
664                 netif_dbg(pegasus, timer, net, "intr status %d\n", status);
665         }
666 
667         if (urb->actual_length >= 6) {
668                 u8 *d = urb->transfer_buffer;
669 
670                 /* byte 0 == tx_status1, reg 2B */
671                 if (d[0] & (TX_UNDERRUN|EXCESSIVE_COL
672                                         |LATE_COL|JABBER_TIMEOUT)) {
673                         pegasus->stats.tx_errors++;
674                         if (d[0] & TX_UNDERRUN)
675                                 pegasus->stats.tx_fifo_errors++;
676                         if (d[0] & (EXCESSIVE_COL | JABBER_TIMEOUT))
677                                 pegasus->stats.tx_aborted_errors++;
678                         if (d[0] & LATE_COL)
679                                 pegasus->stats.tx_window_errors++;
680                 }
681 
682                 /* d[5].LINK_STATUS lies on some adapters.
683                  * d[0].NO_CARRIER kicks in only with failed TX.
684                  * ... so monitoring with MII may be safest.
685                  */
686 
687                 /* bytes 3-4 == rx_lostpkt, reg 2E/2F */
688                 pegasus->stats.rx_missed_errors += ((d[3] & 0x7f) << 8) | d[4];
689         }
690 
691         res = usb_submit_urb(urb, GFP_ATOMIC);
692         if (res == -ENODEV)
693                 netif_device_detach(pegasus->net);
694         if (res)
695                 netif_err(pegasus, timer, net,
696                           "can't resubmit interrupt urb, %d\n", res);
697 }
698 
699 static void pegasus_tx_timeout(struct net_device *net)
700 {
701         pegasus_t *pegasus = netdev_priv(net);
702         netif_warn(pegasus, timer, net, "tx timeout\n");
703         usb_unlink_urb(pegasus->tx_urb);
704         pegasus->stats.tx_errors++;
705 }
706 
707 static netdev_tx_t pegasus_start_xmit(struct sk_buff *skb,
708                                             struct net_device *net)
709 {
710         pegasus_t *pegasus = netdev_priv(net);
711         int count = ((skb->len + 2) & 0x3f) ? skb->len + 2 : skb->len + 3;
712         int res;
713         __u16 l16 = skb->len;
714 
715         netif_stop_queue(net);
716 
717         ((__le16 *) pegasus->tx_buff)[0] = cpu_to_le16(l16);
718         skb_copy_from_linear_data(skb, pegasus->tx_buff + 2, skb->len);
719         usb_fill_bulk_urb(pegasus->tx_urb, pegasus->usb,
720                           usb_sndbulkpipe(pegasus->usb, 2),
721                           pegasus->tx_buff, count,
722                           write_bulk_callback, pegasus);
723         if ((res = usb_submit_urb(pegasus->tx_urb, GFP_ATOMIC))) {
724                 netif_warn(pegasus, tx_err, net, "fail tx, %d\n", res);
725                 switch (res) {
726                 case -EPIPE:            /* stall, or disconnect from TT */
727                         /* cleanup should already have been scheduled */
728                         break;
729                 case -ENODEV:           /* disconnect() upcoming */
730                 case -EPERM:
731                         netif_device_detach(pegasus->net);
732                         break;
733                 default:
734                         pegasus->stats.tx_errors++;
735                         netif_start_queue(net);
736                 }
737         } else {
738                 pegasus->stats.tx_packets++;
739                 pegasus->stats.tx_bytes += skb->len;
740         }
741         dev_kfree_skb(skb);
742 
743         return NETDEV_TX_OK;
744 }
745 
746 static struct net_device_stats *pegasus_netdev_stats(struct net_device *dev)
747 {
748         return &((pegasus_t *) netdev_priv(dev))->stats;
749 }
750 
751 static inline void disable_net_traffic(pegasus_t *pegasus)
752 {
753         __le16 tmp = cpu_to_le16(0);
754 
755         set_registers(pegasus, EthCtrl0, sizeof(tmp), &tmp);
756 }
757 
758 static inline void get_interrupt_interval(pegasus_t *pegasus)
759 {
760         u16 data;
761         u8 interval;
762 
763         read_eprom_word(pegasus, 4, &data);
764         interval = data >> 8;
765         if (pegasus->usb->speed != USB_SPEED_HIGH) {
766                 if (interval < 0x80) {
767                         netif_info(pegasus, timer, pegasus->net,
768                                    "intr interval changed from %ums to %ums\n",
769                                    interval, 0x80);
770                         interval = 0x80;
771                         data = (data & 0x00FF) | ((u16)interval << 8);
772 #ifdef PEGASUS_WRITE_EEPROM
773                         write_eprom_word(pegasus, 4, data);
774 #endif
775                 }
776         }
777         pegasus->intr_interval = interval;
778 }
779 
780 static void set_carrier(struct net_device *net)
781 {
782         pegasus_t *pegasus = netdev_priv(net);
783         u16 tmp;
784 
785         if (read_mii_word(pegasus, pegasus->phy, MII_BMSR, &tmp))
786                 return;
787 
788         if (tmp & BMSR_LSTATUS)
789                 netif_carrier_on(net);
790         else
791                 netif_carrier_off(net);
792 }
793 
794 static void free_all_urbs(pegasus_t *pegasus)
795 {
796         usb_free_urb(pegasus->intr_urb);
797         usb_free_urb(pegasus->tx_urb);
798         usb_free_urb(pegasus->rx_urb);
799 }
800 
801 static void unlink_all_urbs(pegasus_t *pegasus)
802 {
803         usb_kill_urb(pegasus->intr_urb);
804         usb_kill_urb(pegasus->tx_urb);
805         usb_kill_urb(pegasus->rx_urb);
806 }
807 
808 static int alloc_urbs(pegasus_t *pegasus)
809 {
810         int res = -ENOMEM;
811 
812         pegasus->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
813         if (!pegasus->rx_urb) {
814                 return res;
815         }
816         pegasus->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
817         if (!pegasus->tx_urb) {
818                 usb_free_urb(pegasus->rx_urb);
819                 return res;
820         }
821         pegasus->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
822         if (!pegasus->intr_urb) {
823                 usb_free_urb(pegasus->tx_urb);
824                 usb_free_urb(pegasus->rx_urb);
825                 return res;
826         }
827 
828         return 0;
829 }
830 
831 static int pegasus_open(struct net_device *net)
832 {
833         pegasus_t *pegasus = netdev_priv(net);
834         int res=-ENOMEM;
835 
836         if (pegasus->rx_skb == NULL)
837                 pegasus->rx_skb = __netdev_alloc_skb_ip_align(pegasus->net,
838                                                               PEGASUS_MTU,
839                                                               GFP_KERNEL);
840         if (!pegasus->rx_skb)
841                 goto exit;
842 
843         res = set_registers(pegasus, EthID, 6, net->dev_addr);
844 
845         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
846                           usb_rcvbulkpipe(pegasus->usb, 1),
847                           pegasus->rx_skb->data, PEGASUS_MTU,
848                           read_bulk_callback, pegasus);
849         if ((res = usb_submit_urb(pegasus->rx_urb, GFP_KERNEL))) {
850                 if (res == -ENODEV)
851                         netif_device_detach(pegasus->net);
852                 netif_dbg(pegasus, ifup, net, "failed rx_urb, %d\n", res);
853                 goto exit;
854         }
855 
856         usb_fill_int_urb(pegasus->intr_urb, pegasus->usb,
857                          usb_rcvintpipe(pegasus->usb, 3),
858                          pegasus->intr_buff, sizeof(pegasus->intr_buff),
859                          intr_callback, pegasus, pegasus->intr_interval);
860         if ((res = usb_submit_urb(pegasus->intr_urb, GFP_KERNEL))) {
861                 if (res == -ENODEV)
862                         netif_device_detach(pegasus->net);
863                 netif_dbg(pegasus, ifup, net, "failed intr_urb, %d\n", res);
864                 usb_kill_urb(pegasus->rx_urb);
865                 goto exit;
866         }
867         res = enable_net_traffic(net, pegasus->usb);
868         if (res < 0) {
869                 netif_dbg(pegasus, ifup, net,
870                           "can't enable_net_traffic() - %d\n", res);
871                 res = -EIO;
872                 usb_kill_urb(pegasus->rx_urb);
873                 usb_kill_urb(pegasus->intr_urb);
874                 goto exit;
875         }
876         set_carrier(net);
877         netif_start_queue(net);
878         netif_dbg(pegasus, ifup, net, "open\n");
879         res = 0;
880 exit:
881         return res;
882 }
883 
884 static int pegasus_close(struct net_device *net)
885 {
886         pegasus_t *pegasus = netdev_priv(net);
887 
888         netif_stop_queue(net);
889         if (!(pegasus->flags & PEGASUS_UNPLUG))
890                 disable_net_traffic(pegasus);
891         tasklet_kill(&pegasus->rx_tl);
892         unlink_all_urbs(pegasus);
893 
894         return 0;
895 }
896 
897 static void pegasus_get_drvinfo(struct net_device *dev,
898                                 struct ethtool_drvinfo *info)
899 {
900         pegasus_t *pegasus = netdev_priv(dev);
901 
902         strlcpy(info->driver, driver_name, sizeof(info->driver));
903         strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
904         usb_make_path(pegasus->usb, info->bus_info, sizeof(info->bus_info));
905 }
906 
907 /* also handles three patterns of some kind in hardware */
908 #define WOL_SUPPORTED   (WAKE_MAGIC|WAKE_PHY)
909 
910 static void
911 pegasus_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
912 {
913         pegasus_t       *pegasus = netdev_priv(dev);
914 
915         wol->supported = WAKE_MAGIC | WAKE_PHY;
916         wol->wolopts = pegasus->wolopts;
917 }
918 
919 static int
920 pegasus_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
921 {
922         pegasus_t       *pegasus = netdev_priv(dev);
923         u8              reg78 = 0x04;
924         int             ret;
925 
926         if (wol->wolopts & ~WOL_SUPPORTED)
927                 return -EINVAL;
928 
929         if (wol->wolopts & WAKE_MAGIC)
930                 reg78 |= 0x80;
931         if (wol->wolopts & WAKE_PHY)
932                 reg78 |= 0x40;
933         /* FIXME this 0x10 bit still needs to get set in the chip... */
934         if (wol->wolopts)
935                 pegasus->eth_regs[0] |= 0x10;
936         else
937                 pegasus->eth_regs[0] &= ~0x10;
938         pegasus->wolopts = wol->wolopts;
939 
940         ret = set_register(pegasus, WakeupControl, reg78);
941         if (!ret)
942                 ret = device_set_wakeup_enable(&pegasus->usb->dev,
943                                                 wol->wolopts);
944         return ret;
945 }
946 
947 static inline void pegasus_reset_wol(struct net_device *dev)
948 {
949         struct ethtool_wolinfo wol;
950 
951         memset(&wol, 0, sizeof wol);
952         (void) pegasus_set_wol(dev, &wol);
953 }
954 
955 static int
956 pegasus_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
957 {
958         pegasus_t *pegasus;
959 
960         pegasus = netdev_priv(dev);
961         mii_ethtool_gset(&pegasus->mii, ecmd);
962         return 0;
963 }
964 
965 static int
966 pegasus_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
967 {
968         pegasus_t *pegasus = netdev_priv(dev);
969         return mii_ethtool_sset(&pegasus->mii, ecmd);
970 }
971 
972 static int pegasus_nway_reset(struct net_device *dev)
973 {
974         pegasus_t *pegasus = netdev_priv(dev);
975         return mii_nway_restart(&pegasus->mii);
976 }
977 
978 static u32 pegasus_get_link(struct net_device *dev)
979 {
980         pegasus_t *pegasus = netdev_priv(dev);
981         return mii_link_ok(&pegasus->mii);
982 }
983 
984 static u32 pegasus_get_msglevel(struct net_device *dev)
985 {
986         pegasus_t *pegasus = netdev_priv(dev);
987         return pegasus->msg_enable;
988 }
989 
990 static void pegasus_set_msglevel(struct net_device *dev, u32 v)
991 {
992         pegasus_t *pegasus = netdev_priv(dev);
993         pegasus->msg_enable = v;
994 }
995 
996 static const struct ethtool_ops ops = {
997         .get_drvinfo = pegasus_get_drvinfo,
998         .get_settings = pegasus_get_settings,
999         .set_settings = pegasus_set_settings,
1000         .nway_reset = pegasus_nway_reset,
1001         .get_link = pegasus_get_link,
1002         .get_msglevel = pegasus_get_msglevel,
1003         .set_msglevel = pegasus_set_msglevel,
1004         .get_wol = pegasus_get_wol,
1005         .set_wol = pegasus_set_wol,
1006 };
1007 
1008 static int pegasus_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
1009 {
1010         __u16 *data = (__u16 *) &rq->ifr_ifru;
1011         pegasus_t *pegasus = netdev_priv(net);
1012         int res;
1013 
1014         switch (cmd) {
1015         case SIOCDEVPRIVATE:
1016                 data[0] = pegasus->phy;
1017         case SIOCDEVPRIVATE + 1:
1018                 read_mii_word(pegasus, data[0], data[1] & 0x1f, &data[3]);
1019                 res = 0;
1020                 break;
1021         case SIOCDEVPRIVATE + 2:
1022                 if (!capable(CAP_NET_ADMIN))
1023                         return -EPERM;
1024                 write_mii_word(pegasus, pegasus->phy, data[1] & 0x1f, &data[2]);
1025                 res = 0;
1026                 break;
1027         default:
1028                 res = -EOPNOTSUPP;
1029         }
1030         return res;
1031 }
1032 
1033 static void pegasus_set_multicast(struct net_device *net)
1034 {
1035         pegasus_t *pegasus = netdev_priv(net);
1036 
1037         if (net->flags & IFF_PROMISC) {
1038                 pegasus->eth_regs[EthCtrl2] |= RX_PROMISCUOUS;
1039                 netif_info(pegasus, link, net, "Promiscuous mode enabled\n");
1040         } else if (!netdev_mc_empty(net) || (net->flags & IFF_ALLMULTI)) {
1041                 pegasus->eth_regs[EthCtrl0] |= RX_MULTICAST;
1042                 pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1043                 netif_dbg(pegasus, link, net, "set allmulti\n");
1044         } else {
1045                 pegasus->eth_regs[EthCtrl0] &= ~RX_MULTICAST;
1046                 pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1047         }
1048         update_eth_regs_async(pegasus);
1049 }
1050 
1051 static __u8 mii_phy_probe(pegasus_t *pegasus)
1052 {
1053         int i;
1054         __u16 tmp;
1055 
1056         for (i = 0; i < 32; i++) {
1057                 read_mii_word(pegasus, i, MII_BMSR, &tmp);
1058                 if (tmp == 0 || tmp == 0xffff || (tmp & BMSR_MEDIA) == 0)
1059                         continue;
1060                 else
1061                         return i;
1062         }
1063 
1064         return 0xff;
1065 }
1066 
1067 static inline void setup_pegasus_II(pegasus_t *pegasus)
1068 {
1069         __u8 data = 0xa5;
1070 
1071         set_register(pegasus, Reg1d, 0);
1072         set_register(pegasus, Reg7b, 1);
1073         mdelay(100);
1074         if ((pegasus->features & HAS_HOME_PNA) && mii_mode)
1075                 set_register(pegasus, Reg7b, 0);
1076         else
1077                 set_register(pegasus, Reg7b, 2);
1078 
1079         set_register(pegasus, 0x83, data);
1080         get_registers(pegasus, 0x83, 1, &data);
1081 
1082         if (data == 0xa5)
1083                 pegasus->chip = 0x8513;
1084         else
1085                 pegasus->chip = 0;
1086 
1087         set_register(pegasus, 0x80, 0xc0);
1088         set_register(pegasus, 0x83, 0xff);
1089         set_register(pegasus, 0x84, 0x01);
1090 
1091         if (pegasus->features & HAS_HOME_PNA && mii_mode)
1092                 set_register(pegasus, Reg81, 6);
1093         else
1094                 set_register(pegasus, Reg81, 2);
1095 }
1096 
1097 
1098 static int pegasus_count;
1099 static struct workqueue_struct *pegasus_workqueue;
1100 #define CARRIER_CHECK_DELAY (2 * HZ)
1101 
1102 static void check_carrier(struct work_struct *work)
1103 {
1104         pegasus_t *pegasus = container_of(work, pegasus_t, carrier_check.work);
1105         set_carrier(pegasus->net);
1106         if (!(pegasus->flags & PEGASUS_UNPLUG)) {
1107                 queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1108                         CARRIER_CHECK_DELAY);
1109         }
1110 }
1111 
1112 static int pegasus_blacklisted(struct usb_device *udev)
1113 {
1114         struct usb_device_descriptor *udd = &udev->descriptor;
1115 
1116         /* Special quirk to keep the driver from handling the Belkin Bluetooth
1117          * dongle which happens to have the same ID.
1118          */
1119         if ((udd->idVendor == cpu_to_le16(VENDOR_BELKIN)) &&
1120             (udd->idProduct == cpu_to_le16(0x0121)) &&
1121             (udd->bDeviceClass == USB_CLASS_WIRELESS_CONTROLLER) &&
1122             (udd->bDeviceProtocol == 1))
1123                 return 1;
1124 
1125         return 0;
1126 }
1127 
1128 /* we rely on probe() and remove() being serialized so we
1129  * don't need extra locking on pegasus_count.
1130  */
1131 static void pegasus_dec_workqueue(void)
1132 {
1133         pegasus_count--;
1134         if (pegasus_count == 0) {
1135                 destroy_workqueue(pegasus_workqueue);
1136                 pegasus_workqueue = NULL;
1137         }
1138 }
1139 
1140 static int pegasus_probe(struct usb_interface *intf,
1141                          const struct usb_device_id *id)
1142 {
1143         struct usb_device *dev = interface_to_usbdev(intf);
1144         struct net_device *net;
1145         pegasus_t *pegasus;
1146         int dev_index = id - pegasus_ids;
1147         int res = -ENOMEM;
1148 
1149         if (pegasus_blacklisted(dev))
1150                 return -ENODEV;
1151 
1152         if (pegasus_count == 0) {
1153                 pegasus_workqueue = alloc_workqueue("pegasus", WQ_MEM_RECLAIM,
1154                                                     0);
1155                 if (!pegasus_workqueue)
1156                         return -ENOMEM;
1157         }
1158         pegasus_count++;
1159 
1160         net = alloc_etherdev(sizeof(struct pegasus));
1161         if (!net)
1162                 goto out;
1163 
1164         pegasus = netdev_priv(net);
1165         pegasus->dev_index = dev_index;
1166 
1167         res = alloc_urbs(pegasus);
1168         if (res < 0) {
1169                 dev_err(&intf->dev, "can't allocate %s\n", "urbs");
1170                 goto out1;
1171         }
1172 
1173         tasklet_init(&pegasus->rx_tl, rx_fixup, (unsigned long) pegasus);
1174 
1175         INIT_DELAYED_WORK(&pegasus->carrier_check, check_carrier);
1176 
1177         pegasus->intf = intf;
1178         pegasus->usb = dev;
1179         pegasus->net = net;
1180 
1181 
1182         net->watchdog_timeo = PEGASUS_TX_TIMEOUT;
1183         net->netdev_ops = &pegasus_netdev_ops;
1184         net->ethtool_ops = &ops;
1185         pegasus->mii.dev = net;
1186         pegasus->mii.mdio_read = mdio_read;
1187         pegasus->mii.mdio_write = mdio_write;
1188         pegasus->mii.phy_id_mask = 0x1f;
1189         pegasus->mii.reg_num_mask = 0x1f;
1190         pegasus->msg_enable = netif_msg_init(msg_level, NETIF_MSG_DRV
1191                                 | NETIF_MSG_PROBE | NETIF_MSG_LINK);
1192 
1193         pegasus->features = usb_dev_id[dev_index].private;
1194         get_interrupt_interval(pegasus);
1195         if (reset_mac(pegasus)) {
1196                 dev_err(&intf->dev, "can't reset MAC\n");
1197                 res = -EIO;
1198                 goto out2;
1199         }
1200         set_ethernet_addr(pegasus);
1201         if (pegasus->features & PEGASUS_II) {
1202                 dev_info(&intf->dev, "setup Pegasus II specific registers\n");
1203                 setup_pegasus_II(pegasus);
1204         }
1205         pegasus->phy = mii_phy_probe(pegasus);
1206         if (pegasus->phy == 0xff) {
1207                 dev_warn(&intf->dev, "can't locate MII phy, using default\n");
1208                 pegasus->phy = 1;
1209         }
1210         pegasus->mii.phy_id = pegasus->phy;
1211         usb_set_intfdata(intf, pegasus);
1212         SET_NETDEV_DEV(net, &intf->dev);
1213         pegasus_reset_wol(net);
1214         res = register_netdev(net);
1215         if (res)
1216                 goto out3;
1217         queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1218                            CARRIER_CHECK_DELAY);
1219         dev_info(&intf->dev, "%s, %s, %pM\n", net->name,
1220                  usb_dev_id[dev_index].name, net->dev_addr);
1221         return 0;
1222 
1223 out3:
1224         usb_set_intfdata(intf, NULL);
1225 out2:
1226         free_all_urbs(pegasus);
1227 out1:
1228         free_netdev(net);
1229 out:
1230         pegasus_dec_workqueue();
1231         return res;
1232 }
1233 
1234 static void pegasus_disconnect(struct usb_interface *intf)
1235 {
1236         struct pegasus *pegasus = usb_get_intfdata(intf);
1237 
1238         usb_set_intfdata(intf, NULL);
1239         if (!pegasus) {
1240                 dev_dbg(&intf->dev, "unregistering non-bound device?\n");
1241                 return;
1242         }
1243 
1244         pegasus->flags |= PEGASUS_UNPLUG;
1245         cancel_delayed_work(&pegasus->carrier_check);
1246         unregister_netdev(pegasus->net);
1247         unlink_all_urbs(pegasus);
1248         free_all_urbs(pegasus);
1249         if (pegasus->rx_skb != NULL) {
1250                 dev_kfree_skb(pegasus->rx_skb);
1251                 pegasus->rx_skb = NULL;
1252         }
1253         free_netdev(pegasus->net);
1254         pegasus_dec_workqueue();
1255 }
1256 
1257 static int pegasus_suspend(struct usb_interface *intf, pm_message_t message)
1258 {
1259         struct pegasus *pegasus = usb_get_intfdata(intf);
1260 
1261         netif_device_detach(pegasus->net);
1262         cancel_delayed_work(&pegasus->carrier_check);
1263         if (netif_running(pegasus->net)) {
1264                 usb_kill_urb(pegasus->rx_urb);
1265                 usb_kill_urb(pegasus->intr_urb);
1266         }
1267         return 0;
1268 }
1269 
1270 static int pegasus_resume(struct usb_interface *intf)
1271 {
1272         struct pegasus *pegasus = usb_get_intfdata(intf);
1273 
1274         netif_device_attach(pegasus->net);
1275         if (netif_running(pegasus->net)) {
1276                 pegasus->rx_urb->status = 0;
1277                 pegasus->rx_urb->actual_length = 0;
1278                 read_bulk_callback(pegasus->rx_urb);
1279 
1280                 pegasus->intr_urb->status = 0;
1281                 pegasus->intr_urb->actual_length = 0;
1282                 intr_callback(pegasus->intr_urb);
1283         }
1284         queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1285                                 CARRIER_CHECK_DELAY);
1286         return 0;
1287 }
1288 
1289 static const struct net_device_ops pegasus_netdev_ops = {
1290         .ndo_open =                     pegasus_open,
1291         .ndo_stop =                     pegasus_close,
1292         .ndo_do_ioctl =                 pegasus_ioctl,
1293         .ndo_start_xmit =               pegasus_start_xmit,
1294         .ndo_set_rx_mode =              pegasus_set_multicast,
1295         .ndo_get_stats =                pegasus_netdev_stats,
1296         .ndo_tx_timeout =               pegasus_tx_timeout,
1297         .ndo_set_mac_address =          eth_mac_addr,
1298         .ndo_validate_addr =            eth_validate_addr,
1299 };
1300 
1301 static struct usb_driver pegasus_driver = {
1302         .name = driver_name,
1303         .probe = pegasus_probe,
1304         .disconnect = pegasus_disconnect,
1305         .id_table = pegasus_ids,
1306         .suspend = pegasus_suspend,
1307         .resume = pegasus_resume,
1308         .disable_hub_initiated_lpm = 1,
1309 };
1310 
1311 static void __init parse_id(char *id)
1312 {
1313         unsigned int vendor_id = 0, device_id = 0, flags = 0, i = 0;
1314         char *token, *name = NULL;
1315 
1316         if ((token = strsep(&id, ":")) != NULL)
1317                 name = token;
1318         /* name now points to a null terminated string*/
1319         if ((token = strsep(&id, ":")) != NULL)
1320                 vendor_id = simple_strtoul(token, NULL, 16);
1321         if ((token = strsep(&id, ":")) != NULL)
1322                 device_id = simple_strtoul(token, NULL, 16);
1323         flags = simple_strtoul(id, NULL, 16);
1324         pr_info("%s: new device %s, vendor ID 0x%04x, device ID 0x%04x, flags: 0x%x\n",
1325                 driver_name, name, vendor_id, device_id, flags);
1326 
1327         if (vendor_id > 0x10000 || vendor_id == 0)
1328                 return;
1329         if (device_id > 0x10000 || device_id == 0)
1330                 return;
1331 
1332         for (i = 0; usb_dev_id[i].name; i++);
1333         usb_dev_id[i].name = name;
1334         usb_dev_id[i].vendor = vendor_id;
1335         usb_dev_id[i].device = device_id;
1336         usb_dev_id[i].private = flags;
1337         pegasus_ids[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
1338         pegasus_ids[i].idVendor = vendor_id;
1339         pegasus_ids[i].idProduct = device_id;
1340 }
1341 
1342 static int __init pegasus_init(void)
1343 {
1344         pr_info("%s: %s, " DRIVER_DESC "\n", driver_name, DRIVER_VERSION);
1345         if (devid)
1346                 parse_id(devid);
1347         return usb_register(&pegasus_driver);
1348 }
1349 
1350 static void __exit pegasus_exit(void)
1351 {
1352         usb_deregister(&pegasus_driver);
1353 }
1354 
1355 module_init(pegasus_init);
1356 module_exit(pegasus_exit);
1357 

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