Version:  2.0.40 2.2.26 2.4.37 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17

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 <asm/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         int ret;
130 
131         ret = usb_control_msg(pegasus->usb, usb_rcvctrlpipe(pegasus->usb, 0),
132                               PEGASUS_REQ_GET_REGS, PEGASUS_REQT_READ, 0,
133                               indx, data, size, 1000);
134         if (ret < 0)
135                 netif_dbg(pegasus, drv, pegasus->net,
136                           "%s returned %d\n", __func__, ret);
137         return ret;
138 }
139 
140 static int set_registers(pegasus_t *pegasus, __u16 indx, __u16 size, void *data)
141 {
142         int ret;
143 
144         ret = usb_control_msg(pegasus->usb, usb_sndctrlpipe(pegasus->usb, 0),
145                               PEGASUS_REQ_SET_REGS, PEGASUS_REQT_WRITE, 0,
146                               indx, data, size, 100);
147         if (ret < 0)
148                 netif_dbg(pegasus, drv, pegasus->net,
149                           "%s returned %d\n", __func__, ret);
150         return ret;
151 }
152 
153 static int set_register(pegasus_t *pegasus, __u16 indx, __u8 data)
154 {
155         int ret;
156 
157         ret = usb_control_msg(pegasus->usb, usb_sndctrlpipe(pegasus->usb, 0),
158                               PEGASUS_REQ_SET_REG, PEGASUS_REQT_WRITE, data,
159                               indx, &data, 1, 1000);
160         if (ret < 0)
161                 netif_dbg(pegasus, drv, pegasus->net,
162                           "%s returned %d\n", __func__, ret);
163         return ret;
164 }
165 
166 static int update_eth_regs_async(pegasus_t *pegasus)
167 {
168         int ret = -ENOMEM;
169         struct urb *async_urb;
170         struct usb_ctrlrequest *req;
171 
172         req = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
173         if (req == NULL)
174                 return ret;
175 
176         async_urb = usb_alloc_urb(0, GFP_ATOMIC);
177         if (async_urb == NULL) {
178                 kfree(req);
179                 return ret;
180         }
181         req->bRequestType = PEGASUS_REQT_WRITE;
182         req->bRequest = PEGASUS_REQ_SET_REGS;
183         req->wValue = cpu_to_le16(0);
184         req->wIndex = cpu_to_le16(EthCtrl0);
185         req->wLength = cpu_to_le16(3);
186 
187         usb_fill_control_urb(async_urb, pegasus->usb,
188                              usb_sndctrlpipe(pegasus->usb, 0), (void *)req,
189                              pegasus->eth_regs, 3, async_ctrl_callback, req);
190 
191         ret = usb_submit_urb(async_urb, GFP_ATOMIC);
192         if (ret) {
193                 if (ret == -ENODEV)
194                         netif_device_detach(pegasus->net);
195                 netif_err(pegasus, drv, pegasus->net,
196                           "%s returned %d\n", __func__, ret);
197         }
198         return ret;
199 }
200 
201 static int __mii_op(pegasus_t *p, __u8 phy, __u8 indx, __u16 *regd, __u8 cmd)
202 {
203         int i;
204         __u8 data[4] = { phy, 0, 0, indx };
205         __le16 regdi;
206         int ret = -ETIMEDOUT;
207 
208         if (cmd & PHY_WRITE) {
209                 __le16 *t = (__le16 *) & data[1];
210                 *t = cpu_to_le16(*regd);
211         }
212         set_register(p, PhyCtrl, 0);
213         set_registers(p, PhyAddr, sizeof(data), data);
214         set_register(p, PhyCtrl, (indx | cmd));
215         for (i = 0; i < REG_TIMEOUT; i++) {
216                 ret = get_registers(p, PhyCtrl, 1, data);
217                 if (ret < 0)
218                         goto fail;
219                 if (data[0] & PHY_DONE)
220                         break;
221         }
222         if (i >= REG_TIMEOUT)
223                 goto fail;
224         if (cmd & PHY_READ) {
225                 ret = get_registers(p, PhyData, 2, &regdi);
226                 *regd = le16_to_cpu(regdi);
227                 return ret;
228         }
229         return 0;
230 fail:
231         netif_dbg(p, drv, p->net, "%s failed\n", __func__);
232         return ret;
233 }
234 
235 /* Returns non-negative int on success, error on failure */
236 static int read_mii_word(pegasus_t *pegasus, __u8 phy, __u8 indx, __u16 *regd)
237 {
238         return __mii_op(pegasus, phy, indx, regd, PHY_READ);
239 }
240 
241 /* Returns zero on success, error on failure */
242 static int write_mii_word(pegasus_t *pegasus, __u8 phy, __u8 indx, __u16 *regd)
243 {
244         return __mii_op(pegasus, phy, indx, regd, PHY_WRITE);
245 }
246 
247 static int mdio_read(struct net_device *dev, int phy_id, int loc)
248 {
249         pegasus_t *pegasus = netdev_priv(dev);
250         u16 res;
251 
252         read_mii_word(pegasus, phy_id, loc, &res);
253         return (int)res;
254 }
255 
256 static void mdio_write(struct net_device *dev, int phy_id, int loc, int val)
257 {
258         pegasus_t *pegasus = netdev_priv(dev);
259         u16 data = val;
260 
261         write_mii_word(pegasus, phy_id, loc, &data);
262 }
263 
264 static int read_eprom_word(pegasus_t *pegasus, __u8 index, __u16 *retdata)
265 {
266         int i;
267         __u8 tmp;
268         __le16 retdatai;
269         int ret;
270 
271         set_register(pegasus, EpromCtrl, 0);
272         set_register(pegasus, EpromOffset, index);
273         set_register(pegasus, EpromCtrl, EPROM_READ);
274 
275         for (i = 0; i < REG_TIMEOUT; i++) {
276                 ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
277                 if (tmp & EPROM_DONE)
278                         break;
279                 if (ret == -ESHUTDOWN)
280                         goto fail;
281         }
282         if (i >= REG_TIMEOUT)
283                 goto fail;
284 
285         ret = get_registers(pegasus, EpromData, 2, &retdatai);
286         *retdata = le16_to_cpu(retdatai);
287         return ret;
288 
289 fail:
290         netif_warn(pegasus, drv, pegasus->net, "%s failed\n", __func__);
291         return -ETIMEDOUT;
292 }
293 
294 #ifdef  PEGASUS_WRITE_EEPROM
295 static inline void enable_eprom_write(pegasus_t *pegasus)
296 {
297         __u8 tmp;
298 
299         get_registers(pegasus, EthCtrl2, 1, &tmp);
300         set_register(pegasus, EthCtrl2, tmp | EPROM_WR_ENABLE);
301 }
302 
303 static inline void disable_eprom_write(pegasus_t *pegasus)
304 {
305         __u8 tmp;
306 
307         get_registers(pegasus, EthCtrl2, 1, &tmp);
308         set_register(pegasus, EpromCtrl, 0);
309         set_register(pegasus, EthCtrl2, tmp & ~EPROM_WR_ENABLE);
310 }
311 
312 static int write_eprom_word(pegasus_t *pegasus, __u8 index, __u16 data)
313 {
314         int i;
315         __u8 tmp, d[4] = { 0x3f, 0, 0, EPROM_WRITE };
316         int ret;
317         __le16 le_data = cpu_to_le16(data);
318 
319         set_registers(pegasus, EpromOffset, 4, d);
320         enable_eprom_write(pegasus);
321         set_register(pegasus, EpromOffset, index);
322         set_registers(pegasus, EpromData, 2, &le_data);
323         set_register(pegasus, EpromCtrl, EPROM_WRITE);
324 
325         for (i = 0; i < REG_TIMEOUT; i++) {
326                 ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
327                 if (ret == -ESHUTDOWN)
328                         goto fail;
329                 if (tmp & EPROM_DONE)
330                         break;
331         }
332         disable_eprom_write(pegasus);
333         if (i >= REG_TIMEOUT)
334                 goto fail;
335 
336         return ret;
337 
338 fail:
339         netif_warn(pegasus, drv, pegasus->net, "%s failed\n", __func__);
340         return -ETIMEDOUT;
341 }
342 #endif                          /* PEGASUS_WRITE_EEPROM */
343 
344 static inline void get_node_id(pegasus_t *pegasus, __u8 *id)
345 {
346         int i;
347         __u16 w16;
348 
349         for (i = 0; i < 3; i++) {
350                 read_eprom_word(pegasus, i, &w16);
351                 ((__le16 *) id)[i] = cpu_to_le16(w16);
352         }
353 }
354 
355 static void set_ethernet_addr(pegasus_t *pegasus)
356 {
357         __u8 node_id[6];
358 
359         if (pegasus->features & PEGASUS_II) {
360                 get_registers(pegasus, 0x10, sizeof(node_id), node_id);
361         } else {
362                 get_node_id(pegasus, node_id);
363                 set_registers(pegasus, EthID, sizeof(node_id), node_id);
364         }
365         memcpy(pegasus->net->dev_addr, node_id, sizeof(node_id));
366 }
367 
368 static inline int reset_mac(pegasus_t *pegasus)
369 {
370         __u8 data = 0x8;
371         int i;
372 
373         set_register(pegasus, EthCtrl1, data);
374         for (i = 0; i < REG_TIMEOUT; i++) {
375                 get_registers(pegasus, EthCtrl1, 1, &data);
376                 if (~data & 0x08) {
377                         if (loopback)
378                                 break;
379                         if (mii_mode && (pegasus->features & HAS_HOME_PNA))
380                                 set_register(pegasus, Gpio1, 0x34);
381                         else
382                                 set_register(pegasus, Gpio1, 0x26);
383                         set_register(pegasus, Gpio0, pegasus->features);
384                         set_register(pegasus, Gpio0, DEFAULT_GPIO_SET);
385                         break;
386                 }
387         }
388         if (i == REG_TIMEOUT)
389                 return -ETIMEDOUT;
390 
391         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
392             usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
393                 set_register(pegasus, Gpio0, 0x24);
394                 set_register(pegasus, Gpio0, 0x26);
395         }
396         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_ELCON) {
397                 __u16 auxmode;
398                 read_mii_word(pegasus, 3, 0x1b, &auxmode);
399                 auxmode |= 4;
400                 write_mii_word(pegasus, 3, 0x1b, &auxmode);
401         }
402 
403         return 0;
404 }
405 
406 static int enable_net_traffic(struct net_device *dev, struct usb_device *usb)
407 {
408         __u16 linkpart;
409         __u8 data[4];
410         pegasus_t *pegasus = netdev_priv(dev);
411         int ret;
412 
413         read_mii_word(pegasus, pegasus->phy, MII_LPA, &linkpart);
414         data[0] = 0xc9;
415         data[1] = 0;
416         if (linkpart & (ADVERTISE_100FULL | ADVERTISE_10FULL))
417                 data[1] |= 0x20;        /* set full duplex */
418         if (linkpart & (ADVERTISE_100FULL | ADVERTISE_100HALF))
419                 data[1] |= 0x10;        /* set 100 Mbps */
420         if (mii_mode)
421                 data[1] = 0;
422         data[2] = loopback ? 0x09 : 0x01;
423 
424         memcpy(pegasus->eth_regs, data, sizeof(data));
425         ret = set_registers(pegasus, EthCtrl0, 3, data);
426 
427         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
428             usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS2 ||
429             usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
430                 u16 auxmode;
431                 read_mii_word(pegasus, 0, 0x1b, &auxmode);
432                 auxmode |= 4;
433                 write_mii_word(pegasus, 0, 0x1b, &auxmode);
434         }
435 
436         return ret;
437 }
438 
439 static void read_bulk_callback(struct urb *urb)
440 {
441         pegasus_t *pegasus = urb->context;
442         struct net_device *net;
443         int rx_status, count = urb->actual_length;
444         int status = urb->status;
445         u8 *buf = urb->transfer_buffer;
446         __u16 pkt_len;
447 
448         if (!pegasus)
449                 return;
450 
451         net = pegasus->net;
452         if (!netif_device_present(net) || !netif_running(net))
453                 return;
454 
455         switch (status) {
456         case 0:
457                 break;
458         case -ETIME:
459                 netif_dbg(pegasus, rx_err, net, "reset MAC\n");
460                 pegasus->flags &= ~PEGASUS_RX_BUSY;
461                 break;
462         case -EPIPE:            /* stall, or disconnect from TT */
463                 /* FIXME schedule work to clear the halt */
464                 netif_warn(pegasus, rx_err, net, "no rx stall recovery\n");
465                 return;
466         case -ENOENT:
467         case -ECONNRESET:
468         case -ESHUTDOWN:
469                 netif_dbg(pegasus, ifdown, net, "rx unlink, %d\n", status);
470                 return;
471         default:
472                 netif_dbg(pegasus, rx_err, net, "RX status %d\n", status);
473                 goto goon;
474         }
475 
476         if (!count || count < 4)
477                 goto goon;
478 
479         rx_status = buf[count - 2];
480         if (rx_status & 0x1e) {
481                 netif_dbg(pegasus, rx_err, net,
482                           "RX packet error %x\n", rx_status);
483                 pegasus->stats.rx_errors++;
484                 if (rx_status & 0x06)   /* long or runt */
485                         pegasus->stats.rx_length_errors++;
486                 if (rx_status & 0x08)
487                         pegasus->stats.rx_crc_errors++;
488                 if (rx_status & 0x10)   /* extra bits   */
489                         pegasus->stats.rx_frame_errors++;
490                 goto goon;
491         }
492         if (pegasus->chip == 0x8513) {
493                 pkt_len = le32_to_cpu(*(__le32 *)urb->transfer_buffer);
494                 pkt_len &= 0x0fff;
495                 pegasus->rx_skb->data += 2;
496         } else {
497                 pkt_len = buf[count - 3] << 8;
498                 pkt_len += buf[count - 4];
499                 pkt_len &= 0xfff;
500                 pkt_len -= 8;
501         }
502 
503         /*
504          * If the packet is unreasonably long, quietly drop it rather than
505          * kernel panicing by calling skb_put.
506          */
507         if (pkt_len > PEGASUS_MTU)
508                 goto goon;
509 
510         /*
511          * at this point we are sure pegasus->rx_skb != NULL
512          * so we go ahead and pass up the packet.
513          */
514         skb_put(pegasus->rx_skb, pkt_len);
515         pegasus->rx_skb->protocol = eth_type_trans(pegasus->rx_skb, net);
516         netif_rx(pegasus->rx_skb);
517         pegasus->stats.rx_packets++;
518         pegasus->stats.rx_bytes += pkt_len;
519 
520         if (pegasus->flags & PEGASUS_UNPLUG)
521                 return;
522 
523         pegasus->rx_skb = __netdev_alloc_skb_ip_align(pegasus->net, PEGASUS_MTU,
524                                                       GFP_ATOMIC);
525 
526         if (pegasus->rx_skb == NULL)
527                 goto tl_sched;
528 goon:
529         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
530                           usb_rcvbulkpipe(pegasus->usb, 1),
531                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
532                           read_bulk_callback, pegasus);
533         rx_status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);
534         if (rx_status == -ENODEV)
535                 netif_device_detach(pegasus->net);
536         else if (rx_status) {
537                 pegasus->flags |= PEGASUS_RX_URB_FAIL;
538                 goto tl_sched;
539         } else {
540                 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
541         }
542 
543         return;
544 
545 tl_sched:
546         tasklet_schedule(&pegasus->rx_tl);
547 }
548 
549 static void rx_fixup(unsigned long data)
550 {
551         pegasus_t *pegasus;
552         int status;
553 
554         pegasus = (pegasus_t *) data;
555         if (pegasus->flags & PEGASUS_UNPLUG)
556                 return;
557 
558         if (pegasus->flags & PEGASUS_RX_URB_FAIL)
559                 if (pegasus->rx_skb)
560                         goto try_again;
561         if (pegasus->rx_skb == NULL)
562                 pegasus->rx_skb = __netdev_alloc_skb_ip_align(pegasus->net,
563                                                               PEGASUS_MTU,
564                                                               GFP_ATOMIC);
565         if (pegasus->rx_skb == NULL) {
566                 netif_warn(pegasus, rx_err, pegasus->net, "low on memory\n");
567                 tasklet_schedule(&pegasus->rx_tl);
568                 return;
569         }
570         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
571                           usb_rcvbulkpipe(pegasus->usb, 1),
572                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
573                           read_bulk_callback, pegasus);
574 try_again:
575         status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);
576         if (status == -ENODEV)
577                 netif_device_detach(pegasus->net);
578         else if (status) {
579                 pegasus->flags |= PEGASUS_RX_URB_FAIL;
580                 tasklet_schedule(&pegasus->rx_tl);
581         } else {
582                 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
583         }
584 }
585 
586 static void write_bulk_callback(struct urb *urb)
587 {
588         pegasus_t *pegasus = urb->context;
589         struct net_device *net;
590         int status = urb->status;
591 
592         if (!pegasus)
593                 return;
594 
595         net = pegasus->net;
596 
597         if (!netif_device_present(net) || !netif_running(net))
598                 return;
599 
600         switch (status) {
601         case -EPIPE:
602                 /* FIXME schedule_work() to clear the tx halt */
603                 netif_stop_queue(net);
604                 netif_warn(pegasus, tx_err, net, "no tx stall recovery\n");
605                 return;
606         case -ENOENT:
607         case -ECONNRESET:
608         case -ESHUTDOWN:
609                 netif_dbg(pegasus, ifdown, net, "tx unlink, %d\n", status);
610                 return;
611         default:
612                 netif_info(pegasus, tx_err, net, "TX status %d\n", status);
613                 /* FALL THROUGH */
614         case 0:
615                 break;
616         }
617 
618         net->trans_start = jiffies; /* prevent tx timeout */
619         netif_wake_queue(net);
620 }
621 
622 static void intr_callback(struct urb *urb)
623 {
624         pegasus_t *pegasus = urb->context;
625         struct net_device *net;
626         int res, status = urb->status;
627 
628         if (!pegasus)
629                 return;
630         net = pegasus->net;
631 
632         switch (status) {
633         case 0:
634                 break;
635         case -ECONNRESET:       /* unlink */
636         case -ENOENT:
637         case -ESHUTDOWN:
638                 return;
639         default:
640                 /* some Pegasus-I products report LOTS of data
641                  * toggle errors... avoid log spamming
642                  */
643                 netif_dbg(pegasus, timer, net, "intr status %d\n", status);
644         }
645 
646         if (urb->actual_length >= 6) {
647                 u8 *d = urb->transfer_buffer;
648 
649                 /* byte 0 == tx_status1, reg 2B */
650                 if (d[0] & (TX_UNDERRUN|EXCESSIVE_COL
651                                         |LATE_COL|JABBER_TIMEOUT)) {
652                         pegasus->stats.tx_errors++;
653                         if (d[0] & TX_UNDERRUN)
654                                 pegasus->stats.tx_fifo_errors++;
655                         if (d[0] & (EXCESSIVE_COL | JABBER_TIMEOUT))
656                                 pegasus->stats.tx_aborted_errors++;
657                         if (d[0] & LATE_COL)
658                                 pegasus->stats.tx_window_errors++;
659                 }
660 
661                 /* d[5].LINK_STATUS lies on some adapters.
662                  * d[0].NO_CARRIER kicks in only with failed TX.
663                  * ... so monitoring with MII may be safest.
664                  */
665 
666                 /* bytes 3-4 == rx_lostpkt, reg 2E/2F */
667                 pegasus->stats.rx_missed_errors += ((d[3] & 0x7f) << 8) | d[4];
668         }
669 
670         res = usb_submit_urb(urb, GFP_ATOMIC);
671         if (res == -ENODEV)
672                 netif_device_detach(pegasus->net);
673         if (res)
674                 netif_err(pegasus, timer, net,
675                           "can't resubmit interrupt urb, %d\n", res);
676 }
677 
678 static void pegasus_tx_timeout(struct net_device *net)
679 {
680         pegasus_t *pegasus = netdev_priv(net);
681         netif_warn(pegasus, timer, net, "tx timeout\n");
682         usb_unlink_urb(pegasus->tx_urb);
683         pegasus->stats.tx_errors++;
684 }
685 
686 static netdev_tx_t pegasus_start_xmit(struct sk_buff *skb,
687                                             struct net_device *net)
688 {
689         pegasus_t *pegasus = netdev_priv(net);
690         int count = ((skb->len + 2) & 0x3f) ? skb->len + 2 : skb->len + 3;
691         int res;
692         __u16 l16 = skb->len;
693 
694         netif_stop_queue(net);
695 
696         ((__le16 *) pegasus->tx_buff)[0] = cpu_to_le16(l16);
697         skb_copy_from_linear_data(skb, pegasus->tx_buff + 2, skb->len);
698         usb_fill_bulk_urb(pegasus->tx_urb, pegasus->usb,
699                           usb_sndbulkpipe(pegasus->usb, 2),
700                           pegasus->tx_buff, count,
701                           write_bulk_callback, pegasus);
702         if ((res = usb_submit_urb(pegasus->tx_urb, GFP_ATOMIC))) {
703                 netif_warn(pegasus, tx_err, net, "fail tx, %d\n", res);
704                 switch (res) {
705                 case -EPIPE:            /* stall, or disconnect from TT */
706                         /* cleanup should already have been scheduled */
707                         break;
708                 case -ENODEV:           /* disconnect() upcoming */
709                 case -EPERM:
710                         netif_device_detach(pegasus->net);
711                         break;
712                 default:
713                         pegasus->stats.tx_errors++;
714                         netif_start_queue(net);
715                 }
716         } else {
717                 pegasus->stats.tx_packets++;
718                 pegasus->stats.tx_bytes += skb->len;
719         }
720         dev_kfree_skb(skb);
721 
722         return NETDEV_TX_OK;
723 }
724 
725 static struct net_device_stats *pegasus_netdev_stats(struct net_device *dev)
726 {
727         return &((pegasus_t *) netdev_priv(dev))->stats;
728 }
729 
730 static inline void disable_net_traffic(pegasus_t *pegasus)
731 {
732         __le16 tmp = cpu_to_le16(0);
733 
734         set_registers(pegasus, EthCtrl0, sizeof(tmp), &tmp);
735 }
736 
737 static inline void get_interrupt_interval(pegasus_t *pegasus)
738 {
739         u16 data;
740         u8 interval;
741 
742         read_eprom_word(pegasus, 4, &data);
743         interval = data >> 8;
744         if (pegasus->usb->speed != USB_SPEED_HIGH) {
745                 if (interval < 0x80) {
746                         netif_info(pegasus, timer, pegasus->net,
747                                    "intr interval changed from %ums to %ums\n",
748                                    interval, 0x80);
749                         interval = 0x80;
750                         data = (data & 0x00FF) | ((u16)interval << 8);
751 #ifdef PEGASUS_WRITE_EEPROM
752                         write_eprom_word(pegasus, 4, data);
753 #endif
754                 }
755         }
756         pegasus->intr_interval = interval;
757 }
758 
759 static void set_carrier(struct net_device *net)
760 {
761         pegasus_t *pegasus = netdev_priv(net);
762         u16 tmp;
763 
764         if (read_mii_word(pegasus, pegasus->phy, MII_BMSR, &tmp))
765                 return;
766 
767         if (tmp & BMSR_LSTATUS)
768                 netif_carrier_on(net);
769         else
770                 netif_carrier_off(net);
771 }
772 
773 static void free_all_urbs(pegasus_t *pegasus)
774 {
775         usb_free_urb(pegasus->intr_urb);
776         usb_free_urb(pegasus->tx_urb);
777         usb_free_urb(pegasus->rx_urb);
778 }
779 
780 static void unlink_all_urbs(pegasus_t *pegasus)
781 {
782         usb_kill_urb(pegasus->intr_urb);
783         usb_kill_urb(pegasus->tx_urb);
784         usb_kill_urb(pegasus->rx_urb);
785 }
786 
787 static int alloc_urbs(pegasus_t *pegasus)
788 {
789         int res = -ENOMEM;
790 
791         pegasus->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
792         if (!pegasus->rx_urb) {
793                 return res;
794         }
795         pegasus->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
796         if (!pegasus->tx_urb) {
797                 usb_free_urb(pegasus->rx_urb);
798                 return res;
799         }
800         pegasus->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
801         if (!pegasus->intr_urb) {
802                 usb_free_urb(pegasus->tx_urb);
803                 usb_free_urb(pegasus->rx_urb);
804                 return res;
805         }
806 
807         return 0;
808 }
809 
810 static int pegasus_open(struct net_device *net)
811 {
812         pegasus_t *pegasus = netdev_priv(net);
813         int res=-ENOMEM;
814 
815         if (pegasus->rx_skb == NULL)
816                 pegasus->rx_skb = __netdev_alloc_skb_ip_align(pegasus->net,
817                                                               PEGASUS_MTU,
818                                                               GFP_KERNEL);
819         if (!pegasus->rx_skb)
820                 goto exit;
821 
822         res = set_registers(pegasus, EthID, 6, net->dev_addr);
823 
824         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
825                           usb_rcvbulkpipe(pegasus->usb, 1),
826                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
827                           read_bulk_callback, pegasus);
828         if ((res = usb_submit_urb(pegasus->rx_urb, GFP_KERNEL))) {
829                 if (res == -ENODEV)
830                         netif_device_detach(pegasus->net);
831                 netif_dbg(pegasus, ifup, net, "failed rx_urb, %d\n", res);
832                 goto exit;
833         }
834 
835         usb_fill_int_urb(pegasus->intr_urb, pegasus->usb,
836                          usb_rcvintpipe(pegasus->usb, 3),
837                          pegasus->intr_buff, sizeof(pegasus->intr_buff),
838                          intr_callback, pegasus, pegasus->intr_interval);
839         if ((res = usb_submit_urb(pegasus->intr_urb, GFP_KERNEL))) {
840                 if (res == -ENODEV)
841                         netif_device_detach(pegasus->net);
842                 netif_dbg(pegasus, ifup, net, "failed intr_urb, %d\n", res);
843                 usb_kill_urb(pegasus->rx_urb);
844                 goto exit;
845         }
846         res = enable_net_traffic(net, pegasus->usb);
847         if (res < 0) {
848                 netif_dbg(pegasus, ifup, net,
849                           "can't enable_net_traffic() - %d\n", res);
850                 res = -EIO;
851                 usb_kill_urb(pegasus->rx_urb);
852                 usb_kill_urb(pegasus->intr_urb);
853                 goto exit;
854         }
855         set_carrier(net);
856         netif_start_queue(net);
857         netif_dbg(pegasus, ifup, net, "open\n");
858         res = 0;
859 exit:
860         return res;
861 }
862 
863 static int pegasus_close(struct net_device *net)
864 {
865         pegasus_t *pegasus = netdev_priv(net);
866 
867         netif_stop_queue(net);
868         if (!(pegasus->flags & PEGASUS_UNPLUG))
869                 disable_net_traffic(pegasus);
870         tasklet_kill(&pegasus->rx_tl);
871         unlink_all_urbs(pegasus);
872 
873         return 0;
874 }
875 
876 static void pegasus_get_drvinfo(struct net_device *dev,
877                                 struct ethtool_drvinfo *info)
878 {
879         pegasus_t *pegasus = netdev_priv(dev);
880 
881         strlcpy(info->driver, driver_name, sizeof(info->driver));
882         strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
883         usb_make_path(pegasus->usb, info->bus_info, sizeof(info->bus_info));
884 }
885 
886 /* also handles three patterns of some kind in hardware */
887 #define WOL_SUPPORTED   (WAKE_MAGIC|WAKE_PHY)
888 
889 static void
890 pegasus_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
891 {
892         pegasus_t       *pegasus = netdev_priv(dev);
893 
894         wol->supported = WAKE_MAGIC | WAKE_PHY;
895         wol->wolopts = pegasus->wolopts;
896 }
897 
898 static int
899 pegasus_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
900 {
901         pegasus_t       *pegasus = netdev_priv(dev);
902         u8              reg78 = 0x04;
903         int             ret;
904 
905         if (wol->wolopts & ~WOL_SUPPORTED)
906                 return -EINVAL;
907 
908         if (wol->wolopts & WAKE_MAGIC)
909                 reg78 |= 0x80;
910         if (wol->wolopts & WAKE_PHY)
911                 reg78 |= 0x40;
912         /* FIXME this 0x10 bit still needs to get set in the chip... */
913         if (wol->wolopts)
914                 pegasus->eth_regs[0] |= 0x10;
915         else
916                 pegasus->eth_regs[0] &= ~0x10;
917         pegasus->wolopts = wol->wolopts;
918 
919         ret = set_register(pegasus, WakeupControl, reg78);
920         if (!ret)
921                 ret = device_set_wakeup_enable(&pegasus->usb->dev,
922                                                 wol->wolopts);
923         return ret;
924 }
925 
926 static inline void pegasus_reset_wol(struct net_device *dev)
927 {
928         struct ethtool_wolinfo wol;
929 
930         memset(&wol, 0, sizeof wol);
931         (void) pegasus_set_wol(dev, &wol);
932 }
933 
934 static int
935 pegasus_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
936 {
937         pegasus_t *pegasus;
938 
939         pegasus = netdev_priv(dev);
940         mii_ethtool_gset(&pegasus->mii, ecmd);
941         return 0;
942 }
943 
944 static int
945 pegasus_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
946 {
947         pegasus_t *pegasus = netdev_priv(dev);
948         return mii_ethtool_sset(&pegasus->mii, ecmd);
949 }
950 
951 static int pegasus_nway_reset(struct net_device *dev)
952 {
953         pegasus_t *pegasus = netdev_priv(dev);
954         return mii_nway_restart(&pegasus->mii);
955 }
956 
957 static u32 pegasus_get_link(struct net_device *dev)
958 {
959         pegasus_t *pegasus = netdev_priv(dev);
960         return mii_link_ok(&pegasus->mii);
961 }
962 
963 static u32 pegasus_get_msglevel(struct net_device *dev)
964 {
965         pegasus_t *pegasus = netdev_priv(dev);
966         return pegasus->msg_enable;
967 }
968 
969 static void pegasus_set_msglevel(struct net_device *dev, u32 v)
970 {
971         pegasus_t *pegasus = netdev_priv(dev);
972         pegasus->msg_enable = v;
973 }
974 
975 static const struct ethtool_ops ops = {
976         .get_drvinfo = pegasus_get_drvinfo,
977         .get_settings = pegasus_get_settings,
978         .set_settings = pegasus_set_settings,
979         .nway_reset = pegasus_nway_reset,
980         .get_link = pegasus_get_link,
981         .get_msglevel = pegasus_get_msglevel,
982         .set_msglevel = pegasus_set_msglevel,
983         .get_wol = pegasus_get_wol,
984         .set_wol = pegasus_set_wol,
985 };
986 
987 static int pegasus_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
988 {
989         __u16 *data = (__u16 *) &rq->ifr_ifru;
990         pegasus_t *pegasus = netdev_priv(net);
991         int res;
992 
993         switch (cmd) {
994         case SIOCDEVPRIVATE:
995                 data[0] = pegasus->phy;
996         case SIOCDEVPRIVATE + 1:
997                 read_mii_word(pegasus, data[0], data[1] & 0x1f, &data[3]);
998                 res = 0;
999                 break;
1000         case SIOCDEVPRIVATE + 2:
1001                 if (!capable(CAP_NET_ADMIN))
1002                         return -EPERM;
1003                 write_mii_word(pegasus, pegasus->phy, data[1] & 0x1f, &data[2]);
1004                 res = 0;
1005                 break;
1006         default:
1007                 res = -EOPNOTSUPP;
1008         }
1009         return res;
1010 }
1011 
1012 static void pegasus_set_multicast(struct net_device *net)
1013 {
1014         pegasus_t *pegasus = netdev_priv(net);
1015 
1016         if (net->flags & IFF_PROMISC) {
1017                 pegasus->eth_regs[EthCtrl2] |= RX_PROMISCUOUS;
1018                 netif_info(pegasus, link, net, "Promiscuous mode enabled\n");
1019         } else if (!netdev_mc_empty(net) || (net->flags & IFF_ALLMULTI)) {
1020                 pegasus->eth_regs[EthCtrl0] |= RX_MULTICAST;
1021                 pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1022                 netif_dbg(pegasus, link, net, "set allmulti\n");
1023         } else {
1024                 pegasus->eth_regs[EthCtrl0] &= ~RX_MULTICAST;
1025                 pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1026         }
1027         update_eth_regs_async(pegasus);
1028 }
1029 
1030 static __u8 mii_phy_probe(pegasus_t *pegasus)
1031 {
1032         int i;
1033         __u16 tmp;
1034 
1035         for (i = 0; i < 32; i++) {
1036                 read_mii_word(pegasus, i, MII_BMSR, &tmp);
1037                 if (tmp == 0 || tmp == 0xffff || (tmp & BMSR_MEDIA) == 0)
1038                         continue;
1039                 else
1040                         return i;
1041         }
1042 
1043         return 0xff;
1044 }
1045 
1046 static inline void setup_pegasus_II(pegasus_t *pegasus)
1047 {
1048         __u8 data = 0xa5;
1049 
1050         set_register(pegasus, Reg1d, 0);
1051         set_register(pegasus, Reg7b, 1);
1052         mdelay(100);
1053         if ((pegasus->features & HAS_HOME_PNA) && mii_mode)
1054                 set_register(pegasus, Reg7b, 0);
1055         else
1056                 set_register(pegasus, Reg7b, 2);
1057 
1058         set_register(pegasus, 0x83, data);
1059         get_registers(pegasus, 0x83, 1, &data);
1060 
1061         if (data == 0xa5)
1062                 pegasus->chip = 0x8513;
1063         else
1064                 pegasus->chip = 0;
1065 
1066         set_register(pegasus, 0x80, 0xc0);
1067         set_register(pegasus, 0x83, 0xff);
1068         set_register(pegasus, 0x84, 0x01);
1069 
1070         if (pegasus->features & HAS_HOME_PNA && mii_mode)
1071                 set_register(pegasus, Reg81, 6);
1072         else
1073                 set_register(pegasus, Reg81, 2);
1074 }
1075 
1076 
1077 static int pegasus_count;
1078 static struct workqueue_struct *pegasus_workqueue;
1079 #define CARRIER_CHECK_DELAY (2 * HZ)
1080 
1081 static void check_carrier(struct work_struct *work)
1082 {
1083         pegasus_t *pegasus = container_of(work, pegasus_t, carrier_check.work);
1084         set_carrier(pegasus->net);
1085         if (!(pegasus->flags & PEGASUS_UNPLUG)) {
1086                 queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1087                         CARRIER_CHECK_DELAY);
1088         }
1089 }
1090 
1091 static int pegasus_blacklisted(struct usb_device *udev)
1092 {
1093         struct usb_device_descriptor *udd = &udev->descriptor;
1094 
1095         /* Special quirk to keep the driver from handling the Belkin Bluetooth
1096          * dongle which happens to have the same ID.
1097          */
1098         if ((udd->idVendor == cpu_to_le16(VENDOR_BELKIN)) &&
1099             (udd->idProduct == cpu_to_le16(0x0121)) &&
1100             (udd->bDeviceClass == USB_CLASS_WIRELESS_CONTROLLER) &&
1101             (udd->bDeviceProtocol == 1))
1102                 return 1;
1103 
1104         return 0;
1105 }
1106 
1107 /* we rely on probe() and remove() being serialized so we
1108  * don't need extra locking on pegasus_count.
1109  */
1110 static void pegasus_dec_workqueue(void)
1111 {
1112         pegasus_count--;
1113         if (pegasus_count == 0) {
1114                 destroy_workqueue(pegasus_workqueue);
1115                 pegasus_workqueue = NULL;
1116         }
1117 }
1118 
1119 static int pegasus_probe(struct usb_interface *intf,
1120                          const struct usb_device_id *id)
1121 {
1122         struct usb_device *dev = interface_to_usbdev(intf);
1123         struct net_device *net;
1124         pegasus_t *pegasus;
1125         int dev_index = id - pegasus_ids;
1126         int res = -ENOMEM;
1127 
1128         if (pegasus_blacklisted(dev))
1129                 return -ENODEV;
1130 
1131         if (pegasus_count == 0) {
1132                 pegasus_workqueue = create_singlethread_workqueue("pegasus");
1133                 if (!pegasus_workqueue)
1134                         return -ENOMEM;
1135         }
1136         pegasus_count++;
1137 
1138         net = alloc_etherdev(sizeof(struct pegasus));
1139         if (!net)
1140                 goto out;
1141 
1142         pegasus = netdev_priv(net);
1143         pegasus->dev_index = dev_index;
1144 
1145         res = alloc_urbs(pegasus);
1146         if (res < 0) {
1147                 dev_err(&intf->dev, "can't allocate %s\n", "urbs");
1148                 goto out1;
1149         }
1150 
1151         tasklet_init(&pegasus->rx_tl, rx_fixup, (unsigned long) pegasus);
1152 
1153         INIT_DELAYED_WORK(&pegasus->carrier_check, check_carrier);
1154 
1155         pegasus->intf = intf;
1156         pegasus->usb = dev;
1157         pegasus->net = net;
1158 
1159 
1160         net->watchdog_timeo = PEGASUS_TX_TIMEOUT;
1161         net->netdev_ops = &pegasus_netdev_ops;
1162         net->ethtool_ops = &ops;
1163         pegasus->mii.dev = net;
1164         pegasus->mii.mdio_read = mdio_read;
1165         pegasus->mii.mdio_write = mdio_write;
1166         pegasus->mii.phy_id_mask = 0x1f;
1167         pegasus->mii.reg_num_mask = 0x1f;
1168         pegasus->msg_enable = netif_msg_init(msg_level, NETIF_MSG_DRV
1169                                 | NETIF_MSG_PROBE | NETIF_MSG_LINK);
1170 
1171         pegasus->features = usb_dev_id[dev_index].private;
1172         get_interrupt_interval(pegasus);
1173         if (reset_mac(pegasus)) {
1174                 dev_err(&intf->dev, "can't reset MAC\n");
1175                 res = -EIO;
1176                 goto out2;
1177         }
1178         set_ethernet_addr(pegasus);
1179         if (pegasus->features & PEGASUS_II) {
1180                 dev_info(&intf->dev, "setup Pegasus II specific registers\n");
1181                 setup_pegasus_II(pegasus);
1182         }
1183         pegasus->phy = mii_phy_probe(pegasus);
1184         if (pegasus->phy == 0xff) {
1185                 dev_warn(&intf->dev, "can't locate MII phy, using default\n");
1186                 pegasus->phy = 1;
1187         }
1188         pegasus->mii.phy_id = pegasus->phy;
1189         usb_set_intfdata(intf, pegasus);
1190         SET_NETDEV_DEV(net, &intf->dev);
1191         pegasus_reset_wol(net);
1192         res = register_netdev(net);
1193         if (res)
1194                 goto out3;
1195         queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1196                            CARRIER_CHECK_DELAY);
1197         dev_info(&intf->dev, "%s, %s, %pM\n", net->name,
1198                  usb_dev_id[dev_index].name, net->dev_addr);
1199         return 0;
1200 
1201 out3:
1202         usb_set_intfdata(intf, NULL);
1203 out2:
1204         free_all_urbs(pegasus);
1205 out1:
1206         free_netdev(net);
1207 out:
1208         pegasus_dec_workqueue();
1209         return res;
1210 }
1211 
1212 static void pegasus_disconnect(struct usb_interface *intf)
1213 {
1214         struct pegasus *pegasus = usb_get_intfdata(intf);
1215 
1216         usb_set_intfdata(intf, NULL);
1217         if (!pegasus) {
1218                 dev_dbg(&intf->dev, "unregistering non-bound device?\n");
1219                 return;
1220         }
1221 
1222         pegasus->flags |= PEGASUS_UNPLUG;
1223         cancel_delayed_work(&pegasus->carrier_check);
1224         unregister_netdev(pegasus->net);
1225         unlink_all_urbs(pegasus);
1226         free_all_urbs(pegasus);
1227         if (pegasus->rx_skb != NULL) {
1228                 dev_kfree_skb(pegasus->rx_skb);
1229                 pegasus->rx_skb = NULL;
1230         }
1231         free_netdev(pegasus->net);
1232         pegasus_dec_workqueue();
1233 }
1234 
1235 static int pegasus_suspend(struct usb_interface *intf, pm_message_t message)
1236 {
1237         struct pegasus *pegasus = usb_get_intfdata(intf);
1238 
1239         netif_device_detach(pegasus->net);
1240         cancel_delayed_work(&pegasus->carrier_check);
1241         if (netif_running(pegasus->net)) {
1242                 usb_kill_urb(pegasus->rx_urb);
1243                 usb_kill_urb(pegasus->intr_urb);
1244         }
1245         return 0;
1246 }
1247 
1248 static int pegasus_resume(struct usb_interface *intf)
1249 {
1250         struct pegasus *pegasus = usb_get_intfdata(intf);
1251 
1252         netif_device_attach(pegasus->net);
1253         if (netif_running(pegasus->net)) {
1254                 pegasus->rx_urb->status = 0;
1255                 pegasus->rx_urb->actual_length = 0;
1256                 read_bulk_callback(pegasus->rx_urb);
1257 
1258                 pegasus->intr_urb->status = 0;
1259                 pegasus->intr_urb->actual_length = 0;
1260                 intr_callback(pegasus->intr_urb);
1261         }
1262         queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1263                                 CARRIER_CHECK_DELAY);
1264         return 0;
1265 }
1266 
1267 static const struct net_device_ops pegasus_netdev_ops = {
1268         .ndo_open =                     pegasus_open,
1269         .ndo_stop =                     pegasus_close,
1270         .ndo_do_ioctl =                 pegasus_ioctl,
1271         .ndo_start_xmit =               pegasus_start_xmit,
1272         .ndo_set_rx_mode =              pegasus_set_multicast,
1273         .ndo_get_stats =                pegasus_netdev_stats,
1274         .ndo_tx_timeout =               pegasus_tx_timeout,
1275         .ndo_change_mtu =               eth_change_mtu,
1276         .ndo_set_mac_address =          eth_mac_addr,
1277         .ndo_validate_addr =            eth_validate_addr,
1278 };
1279 
1280 static struct usb_driver pegasus_driver = {
1281         .name = driver_name,
1282         .probe = pegasus_probe,
1283         .disconnect = pegasus_disconnect,
1284         .id_table = pegasus_ids,
1285         .suspend = pegasus_suspend,
1286         .resume = pegasus_resume,
1287         .disable_hub_initiated_lpm = 1,
1288 };
1289 
1290 static void __init parse_id(char *id)
1291 {
1292         unsigned int vendor_id = 0, device_id = 0, flags = 0, i = 0;
1293         char *token, *name = NULL;
1294 
1295         if ((token = strsep(&id, ":")) != NULL)
1296                 name = token;
1297         /* name now points to a null terminated string*/
1298         if ((token = strsep(&id, ":")) != NULL)
1299                 vendor_id = simple_strtoul(token, NULL, 16);
1300         if ((token = strsep(&id, ":")) != NULL)
1301                 device_id = simple_strtoul(token, NULL, 16);
1302         flags = simple_strtoul(id, NULL, 16);
1303         pr_info("%s: new device %s, vendor ID 0x%04x, device ID 0x%04x, flags: 0x%x\n",
1304                 driver_name, name, vendor_id, device_id, flags);
1305 
1306         if (vendor_id > 0x10000 || vendor_id == 0)
1307                 return;
1308         if (device_id > 0x10000 || device_id == 0)
1309                 return;
1310 
1311         for (i = 0; usb_dev_id[i].name; i++);
1312         usb_dev_id[i].name = name;
1313         usb_dev_id[i].vendor = vendor_id;
1314         usb_dev_id[i].device = device_id;
1315         usb_dev_id[i].private = flags;
1316         pegasus_ids[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
1317         pegasus_ids[i].idVendor = vendor_id;
1318         pegasus_ids[i].idProduct = device_id;
1319 }
1320 
1321 static int __init pegasus_init(void)
1322 {
1323         pr_info("%s: %s, " DRIVER_DESC "\n", driver_name, DRIVER_VERSION);
1324         if (devid)
1325                 parse_id(devid);
1326         return usb_register(&pegasus_driver);
1327 }
1328 
1329 static void __exit pegasus_exit(void)
1330 {
1331         usb_deregister(&pegasus_driver);
1332 }
1333 
1334 module_init(pegasus_init);
1335 module_exit(pegasus_exit);
1336 

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