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Avoid beyond bounds copy while caching ACL
[zen-stable.git] / drivers / net / usb / pegasus.c
blob5d99b8cacd7d01065007f625459edc2329e46e8a
1 /*
2 * Copyright (c) 1999-2005 Petko Manolov (petkan@users.sourceforge.net)
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
31 #include <linux/sched.h>
32 #include <linux/slab.h>
33 #include <linux/init.h>
34 #include <linux/delay.h>
35 #include <linux/netdevice.h>
36 #include <linux/etherdevice.h>
37 #include <linux/ethtool.h>
38 #include <linux/mii.h>
39 #include <linux/usb.h>
40 #include <linux/module.h>
41 #include <asm/byteorder.h>
42 #include <asm/uaccess.h>
43 #include "pegasus.h"
44
45 /*
46 * Version Information
47 */
48 #define DRIVER_VERSION "v0.6.14 (2006/09/27)"
49 #define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>"
50 #define DRIVER_DESC "Pegasus/Pegasus II USB Ethernet driver"
51
52 static const char driver_name[] = "pegasus";
53
54 #undef PEGASUS_WRITE_EEPROM
55 #define BMSR_MEDIA (BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | \
56 BMSR_100FULL | BMSR_ANEGCAPABLE)
57
58 static bool loopback;
59 static bool mii_mode;
60 static char *devid;
61
62 static struct usb_eth_dev usb_dev_id[] = {
63 #define PEGASUS_DEV(pn, vid, pid, flags) \
64 {.name = pn, .vendor = vid, .device = pid, .private = flags},
65 #define PEGASUS_DEV_CLASS(pn, vid, pid, dclass, flags) \
66 PEGASUS_DEV(pn, vid, pid, flags)
67 #include "pegasus.h"
68 #undef PEGASUS_DEV
69 #undef PEGASUS_DEV_CLASS
70 {NULL, 0, 0, 0},
71 {NULL, 0, 0, 0}
72 };
73
74 static struct usb_device_id pegasus_ids[] = {
75 #define PEGASUS_DEV(pn, vid, pid, flags) \
76 {.match_flags = USB_DEVICE_ID_MATCH_DEVICE, .idVendor = vid, .idProduct = pid},
77 /*
78 * The Belkin F8T012xx1 bluetooth adaptor has the same vendor and product
79 * IDs as the Belkin F5D5050, so we need to teach the pegasus driver to
80 * ignore adaptors belonging to the "Wireless" class 0xE0. For this one
81 * case anyway, seeing as the pegasus is for "Wired" adaptors.
82 */
83 #define PEGASUS_DEV_CLASS(pn, vid, pid, dclass, flags) \
84 {.match_flags = (USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_DEV_CLASS), \
85 .idVendor = vid, .idProduct = pid, .bDeviceClass = dclass},
86 #include "pegasus.h"
87 #undef PEGASUS_DEV
88 #undef PEGASUS_DEV_CLASS
89 {},
90 {}
91 };
92
93 MODULE_AUTHOR(DRIVER_AUTHOR);
94 MODULE_DESCRIPTION(DRIVER_DESC);
95 MODULE_LICENSE("GPL");
96 module_param(loopback, bool, 0);
97 module_param(mii_mode, bool, 0);
98 module_param(devid, charp, 0);
99 MODULE_PARM_DESC(loopback, "Enable MAC loopback mode (bit 0)");
100 MODULE_PARM_DESC(mii_mode, "Enable HomePNA mode (bit 0),default=MII mode = 0");
101 MODULE_PARM_DESC(devid, "The format is: 'DEV_name:VendorID:DeviceID:Flags'");
102
103 /* use ethtool to change the level for any given device */
104 static int msg_level = -1;
105 module_param(msg_level, int, 0);
106 MODULE_PARM_DESC(msg_level, "Override default message level");
107
108 MODULE_DEVICE_TABLE(usb, pegasus_ids);
109 static const struct net_device_ops pegasus_netdev_ops;
110
111 static int update_eth_regs_async(pegasus_t *);
112 /* Aargh!!! I _really_ hate such tweaks */
113 static void ctrl_callback(struct urb *urb)
114 {
115 pegasus_t *pegasus = urb->context;
116 int status = urb->status;
117
118 if (!pegasus)
119 return;
120
121 switch (status) {
122 case 0:
123 if (pegasus->flags & ETH_REGS_CHANGE) {
124 pegasus->flags &= ~ETH_REGS_CHANGE;
125 pegasus->flags |= ETH_REGS_CHANGED;
126 update_eth_regs_async(pegasus);
127 return;
128 }
129 break;
130 case -EINPROGRESS:
131 return;
132 case -ENOENT:
133 break;
134 default:
135 if (net_ratelimit())
136 netif_dbg(pegasus, drv, pegasus->net,
137 "%s, status %d\n", __func__, status);
138 break;
139 }
140 pegasus->flags &= ~ETH_REGS_CHANGED;
141 wake_up(&pegasus->ctrl_wait);
142 }
143
144 static int get_registers(pegasus_t *pegasus, __u16 indx, __u16 size,
145 void *data)
146 {
147 int ret;
148 char *buffer;
149 DECLARE_WAITQUEUE(wait, current);
150
151 buffer = kmalloc(size, GFP_KERNEL);
152 if (!buffer) {
153 netif_warn(pegasus, drv, pegasus->net,
154 "out of memory in %s\n", __func__);
155 return -ENOMEM;
156 }
157 add_wait_queue(&pegasus->ctrl_wait, &wait);
158 set_current_state(TASK_UNINTERRUPTIBLE);
159 while (pegasus->flags & ETH_REGS_CHANGED)
160 schedule();
161 remove_wait_queue(&pegasus->ctrl_wait, &wait);
162 set_current_state(TASK_RUNNING);
163
164 pegasus->dr.bRequestType = PEGASUS_REQT_READ;
165 pegasus->dr.bRequest = PEGASUS_REQ_GET_REGS;
166 pegasus->dr.wValue = cpu_to_le16(0);
167 pegasus->dr.wIndex = cpu_to_le16(indx);
168 pegasus->dr.wLength = cpu_to_le16(size);
169 pegasus->ctrl_urb->transfer_buffer_length = size;
170
171 usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
172 usb_rcvctrlpipe(pegasus->usb, 0),
173 (char *) &pegasus->dr,
174 buffer, size, ctrl_callback, pegasus);
175
176 add_wait_queue(&pegasus->ctrl_wait, &wait);
177 set_current_state(TASK_UNINTERRUPTIBLE);
178
179 /* using ATOMIC, we'd never wake up if we slept */
180 if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
181 set_current_state(TASK_RUNNING);
182 if (ret == -ENODEV)
183 netif_device_detach(pegasus->net);
184 if (net_ratelimit())
185 netif_err(pegasus, drv, pegasus->net,
186 "%s, status %d\n", __func__, ret);
187 goto out;
188 }
189
190 schedule();
191 out:
192 remove_wait_queue(&pegasus->ctrl_wait, &wait);
193 memcpy(data, buffer, size);
194 kfree(buffer);
195
196 return ret;
197 }
198
199 static int set_registers(pegasus_t *pegasus, __u16 indx, __u16 size,
200 void *data)
201 {
202 int ret;
203 char *buffer;
204 DECLARE_WAITQUEUE(wait, current);
205
206 buffer = kmemdup(data, size, GFP_KERNEL);
207 if (!buffer) {
208 netif_warn(pegasus, drv, pegasus->net,
209 "out of memory in %s\n", __func__);
210 return -ENOMEM;
211 }
212
213 add_wait_queue(&pegasus->ctrl_wait, &wait);
214 set_current_state(TASK_UNINTERRUPTIBLE);
215 while (pegasus->flags & ETH_REGS_CHANGED)
216 schedule();
217 remove_wait_queue(&pegasus->ctrl_wait, &wait);
218 set_current_state(TASK_RUNNING);
219
220 pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
221 pegasus->dr.bRequest = PEGASUS_REQ_SET_REGS;
222 pegasus->dr.wValue = cpu_to_le16(0);
223 pegasus->dr.wIndex = cpu_to_le16(indx);
224 pegasus->dr.wLength = cpu_to_le16(size);
225 pegasus->ctrl_urb->transfer_buffer_length = size;
226
227 usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
228 usb_sndctrlpipe(pegasus->usb, 0),
229 (char *) &pegasus->dr,
230 buffer, size, ctrl_callback, pegasus);
231
232 add_wait_queue(&pegasus->ctrl_wait, &wait);
233 set_current_state(TASK_UNINTERRUPTIBLE);
234
235 if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
236 if (ret == -ENODEV)
237 netif_device_detach(pegasus->net);
238 netif_err(pegasus, drv, pegasus->net,
239 "%s, status %d\n", __func__, ret);
240 goto out;
241 }
242
243 schedule();
244 out:
245 remove_wait_queue(&pegasus->ctrl_wait, &wait);
246 kfree(buffer);
247
248 return ret;
249 }
250
251 static int set_register(pegasus_t *pegasus, __u16 indx, __u8 data)
252 {
253 int ret;
254 char *tmp;
255 DECLARE_WAITQUEUE(wait, current);
256
257 tmp = kmemdup(&data, 1, GFP_KERNEL);
258 if (!tmp) {
259 netif_warn(pegasus, drv, pegasus->net,
260 "out of memory in %s\n", __func__);
261 return -ENOMEM;
262 }
263 add_wait_queue(&pegasus->ctrl_wait, &wait);
264 set_current_state(TASK_UNINTERRUPTIBLE);
265 while (pegasus->flags & ETH_REGS_CHANGED)
266 schedule();
267 remove_wait_queue(&pegasus->ctrl_wait, &wait);
268 set_current_state(TASK_RUNNING);
269
270 pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
271 pegasus->dr.bRequest = PEGASUS_REQ_SET_REG;
272 pegasus->dr.wValue = cpu_to_le16(data);
273 pegasus->dr.wIndex = cpu_to_le16(indx);
274 pegasus->dr.wLength = cpu_to_le16(1);
275 pegasus->ctrl_urb->transfer_buffer_length = 1;
276
277 usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
278 usb_sndctrlpipe(pegasus->usb, 0),
279 (char *) &pegasus->dr,
280 tmp, 1, ctrl_callback, pegasus);
281
282 add_wait_queue(&pegasus->ctrl_wait, &wait);
283 set_current_state(TASK_UNINTERRUPTIBLE);
284
285 if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
286 if (ret == -ENODEV)
287 netif_device_detach(pegasus->net);
288 if (net_ratelimit())
289 netif_err(pegasus, drv, pegasus->net,
290 "%s, status %d\n", __func__, ret);
291 goto out;
292 }
293
294 schedule();
295 out:
296 remove_wait_queue(&pegasus->ctrl_wait, &wait);
297 kfree(tmp);
298
299 return ret;
300 }
301
302 static int update_eth_regs_async(pegasus_t *pegasus)
303 {
304 int ret;
305
306 pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
307 pegasus->dr.bRequest = PEGASUS_REQ_SET_REGS;
308 pegasus->dr.wValue = cpu_to_le16(0);
309 pegasus->dr.wIndex = cpu_to_le16(EthCtrl0);
310 pegasus->dr.wLength = cpu_to_le16(3);
311 pegasus->ctrl_urb->transfer_buffer_length = 3;
312
313 usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
314 usb_sndctrlpipe(pegasus->usb, 0),
315 (char *) &pegasus->dr,
316 pegasus->eth_regs, 3, ctrl_callback, pegasus);
317
318 if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
319 if (ret == -ENODEV)
320 netif_device_detach(pegasus->net);
321 netif_err(pegasus, drv, pegasus->net,
322 "%s, status %d\n", __func__, ret);
323 }
324
325 return ret;
326 }
327
328 /* Returns 0 on success, error on failure */
329 static int read_mii_word(pegasus_t *pegasus, __u8 phy, __u8 indx, __u16 *regd)
330 {
331 int i;
332 __u8 data[4] = { phy, 0, 0, indx };
333 __le16 regdi;
334 int ret;
335
336 set_register(pegasus, PhyCtrl, 0);
337 set_registers(pegasus, PhyAddr, sizeof(data), data);
338 set_register(pegasus, PhyCtrl, (indx | PHY_READ));
339 for (i = 0; i < REG_TIMEOUT; i++) {
340 ret = get_registers(pegasus, PhyCtrl, 1, data);
341 if (ret == -ESHUTDOWN)
342 goto fail;
343 if (data[0] & PHY_DONE)
344 break;
345 }
346
347 if (i >= REG_TIMEOUT)
348 goto fail;
349
350 ret = get_registers(pegasus, PhyData, 2, &regdi);
351 *regd = le16_to_cpu(regdi);
352 return ret;
353
354 fail:
355 netif_warn(pegasus, drv, pegasus->net, "%s failed\n", __func__);
356
357 return ret;
358 }
359
360 static int mdio_read(struct net_device *dev, int phy_id, int loc)
361 {
362 pegasus_t *pegasus = netdev_priv(dev);
363 u16 res;
364
365 read_mii_word(pegasus, phy_id, loc, &res);
366 return (int)res;
367 }
368
369 static int write_mii_word(pegasus_t *pegasus, __u8 phy, __u8 indx, __u16 regd)
370 {
371 int i;
372 __u8 data[4] = { phy, 0, 0, indx };
373 int ret;
374
375 data[1] = (u8) regd;
376 data[2] = (u8) (regd >> 8);
377 set_register(pegasus, PhyCtrl, 0);
378 set_registers(pegasus, PhyAddr, sizeof(data), data);
379 set_register(pegasus, PhyCtrl, (indx | PHY_WRITE));
380 for (i = 0; i < REG_TIMEOUT; i++) {
381 ret = get_registers(pegasus, PhyCtrl, 1, data);
382 if (ret == -ESHUTDOWN)
383 goto fail;
384 if (data[0] & PHY_DONE)
385 break;
386 }
387
388 if (i >= REG_TIMEOUT)
389 goto fail;
390
391 return ret;
392
393 fail:
394 netif_warn(pegasus, drv, pegasus->net, "%s failed\n", __func__);
395 return -ETIMEDOUT;
396 }
397
398 static void mdio_write(struct net_device *dev, int phy_id, int loc, int val)
399 {
400 pegasus_t *pegasus = netdev_priv(dev);
401
402 write_mii_word(pegasus, phy_id, loc, val);
403 }
404
405 static int read_eprom_word(pegasus_t *pegasus, __u8 index, __u16 *retdata)
406 {
407 int i;
408 __u8 tmp;
409 __le16 retdatai;
410 int ret;
411
412 set_register(pegasus, EpromCtrl, 0);
413 set_register(pegasus, EpromOffset, index);
414 set_register(pegasus, EpromCtrl, EPROM_READ);
415
416 for (i = 0; i < REG_TIMEOUT; i++) {
417 ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
418 if (tmp & EPROM_DONE)
419 break;
420 if (ret == -ESHUTDOWN)
421 goto fail;
422 }
423 if (i >= REG_TIMEOUT)
424 goto fail;
425
426 ret = get_registers(pegasus, EpromData, 2, &retdatai);
427 *retdata = le16_to_cpu(retdatai);
428 return ret;
429
430 fail:
431 netif_warn(pegasus, drv, pegasus->net, "%s failed\n", __func__);
432 return -ETIMEDOUT;
433 }
434
435 #ifdef PEGASUS_WRITE_EEPROM
436 static inline void enable_eprom_write(pegasus_t *pegasus)
437 {
438 __u8 tmp;
439 int ret;
440
441 get_registers(pegasus, EthCtrl2, 1, &tmp);
442 set_register(pegasus, EthCtrl2, tmp | EPROM_WR_ENABLE);
443 }
444
445 static inline void disable_eprom_write(pegasus_t *pegasus)
446 {
447 __u8 tmp;
448 int ret;
449
450 get_registers(pegasus, EthCtrl2, 1, &tmp);
451 set_register(pegasus, EpromCtrl, 0);
452 set_register(pegasus, EthCtrl2, tmp & ~EPROM_WR_ENABLE);
453 }
454
455 static int write_eprom_word(pegasus_t *pegasus, __u8 index, __u16 data)
456 {
457 int i;
458 __u8 tmp, d[4] = { 0x3f, 0, 0, EPROM_WRITE };
459 int ret;
460 __le16 le_data = cpu_to_le16(data);
461
462 set_registers(pegasus, EpromOffset, 4, d);
463 enable_eprom_write(pegasus);
464 set_register(pegasus, EpromOffset, index);
465 set_registers(pegasus, EpromData, 2, &le_data);
466 set_register(pegasus, EpromCtrl, EPROM_WRITE);
467
468 for (i = 0; i < REG_TIMEOUT; i++) {
469 ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
470 if (ret == -ESHUTDOWN)
471 goto fail;
472 if (tmp & EPROM_DONE)
473 break;
474 }
475 disable_eprom_write(pegasus);
476 if (i >= REG_TIMEOUT)
477 goto fail;
478
479 return ret;
480
481 fail:
482 netif_warn(pegasus, drv, pegasus->net, "%s failed\n", __func__);
483 return -ETIMEDOUT;
484 }
485 #endif /* PEGASUS_WRITE_EEPROM */
486
487 static inline void get_node_id(pegasus_t *pegasus, __u8 *id)
488 {
489 int i;
490 __u16 w16;
491
492 for (i = 0; i < 3; i++) {
493 read_eprom_word(pegasus, i, &w16);
494 ((__le16 *) id)[i] = cpu_to_le16(w16);
495 }
496 }
497
498 static void set_ethernet_addr(pegasus_t *pegasus)
499 {
500 __u8 node_id[6];
501
502 if (pegasus->features & PEGASUS_II) {
503 get_registers(pegasus, 0x10, sizeof(node_id), node_id);
504 } else {
505 get_node_id(pegasus, node_id);
506 set_registers(pegasus, EthID, sizeof(node_id), node_id);
507 }
508 memcpy(pegasus->net->dev_addr, node_id, sizeof(node_id));
509 }
510
511 static inline int reset_mac(pegasus_t *pegasus)
512 {
513 __u8 data = 0x8;
514 int i;
515
516 set_register(pegasus, EthCtrl1, data);
517 for (i = 0; i < REG_TIMEOUT; i++) {
518 get_registers(pegasus, EthCtrl1, 1, &data);
519 if (~data & 0x08) {
520 if (loopback)
521 break;
522 if (mii_mode && (pegasus->features & HAS_HOME_PNA))
523 set_register(pegasus, Gpio1, 0x34);
524 else
525 set_register(pegasus, Gpio1, 0x26);
526 set_register(pegasus, Gpio0, pegasus->features);
527 set_register(pegasus, Gpio0, DEFAULT_GPIO_SET);
528 break;
529 }
530 }
531 if (i == REG_TIMEOUT)
532 return -ETIMEDOUT;
533
534 if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
535 usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
536 set_register(pegasus, Gpio0, 0x24);
537 set_register(pegasus, Gpio0, 0x26);
538 }
539 if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_ELCON) {
540 __u16 auxmode;
541 read_mii_word(pegasus, 3, 0x1b, &auxmode);
542 write_mii_word(pegasus, 3, 0x1b, auxmode | 4);
543 }
544
545 return 0;
546 }
547
548 static int enable_net_traffic(struct net_device *dev, struct usb_device *usb)
549 {
550 __u16 linkpart;
551 __u8 data[4];
552 pegasus_t *pegasus = netdev_priv(dev);
553 int ret;
554
555 read_mii_word(pegasus, pegasus->phy, MII_LPA, &linkpart);
556 data[0] = 0xc9;
557 data[1] = 0;
558 if (linkpart & (ADVERTISE_100FULL | ADVERTISE_10FULL))
559 data[1] |= 0x20; /* set full duplex */
560 if (linkpart & (ADVERTISE_100FULL | ADVERTISE_100HALF))
561 data[1] |= 0x10; /* set 100 Mbps */
562 if (mii_mode)
563 data[1] = 0;
564 data[2] = loopback ? 0x09 : 0x01;
565
566 memcpy(pegasus->eth_regs, data, sizeof(data));
567 ret = set_registers(pegasus, EthCtrl0, 3, data);
568
569 if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
570 usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS2 ||
571 usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
572 u16 auxmode;
573 read_mii_word(pegasus, 0, 0x1b, &auxmode);
574 write_mii_word(pegasus, 0, 0x1b, auxmode | 4);
575 }
576
577 return ret;
578 }
579
580 static void fill_skb_pool(pegasus_t *pegasus)
581 {
582 int i;
583
584 for (i = 0; i < RX_SKBS; i++) {
585 if (pegasus->rx_pool[i])
586 continue;
587 pegasus->rx_pool[i] = dev_alloc_skb(PEGASUS_MTU + 2);
588 /*
589 ** we give up if the allocation fail. the tasklet will be
590 ** rescheduled again anyway...
591 */
592 if (pegasus->rx_pool[i] == NULL)
593 return;
594 skb_reserve(pegasus->rx_pool[i], 2);
595 }
596 }
597
598 static void free_skb_pool(pegasus_t *pegasus)
599 {
600 int i;
601
602 for (i = 0; i < RX_SKBS; i++) {
603 if (pegasus->rx_pool[i]) {
604 dev_kfree_skb(pegasus->rx_pool[i]);
605 pegasus->rx_pool[i] = NULL;
606 }
607 }
608 }
609
610 static inline struct sk_buff *pull_skb(pegasus_t * pegasus)
611 {
612 int i;
613 struct sk_buff *skb;
614
615 for (i = 0; i < RX_SKBS; i++) {
616 if (likely(pegasus->rx_pool[i] != NULL)) {
617 skb = pegasus->rx_pool[i];
618 pegasus->rx_pool[i] = NULL;
619 return skb;
620 }
621 }
622 return NULL;
623 }
624
625 static void read_bulk_callback(struct urb *urb)
626 {
627 pegasus_t *pegasus = urb->context;
628 struct net_device *net;
629 int rx_status, count = urb->actual_length;
630 int status = urb->status;
631 u8 *buf = urb->transfer_buffer;
632 __u16 pkt_len;
633
634 if (!pegasus)
635 return;
636
637 net = pegasus->net;
638 if (!netif_device_present(net) || !netif_running(net))
639 return;
640
641 switch (status) {
642 case 0:
643 break;
644 case -ETIME:
645 netif_dbg(pegasus, rx_err, net, "reset MAC\n");
646 pegasus->flags &= ~PEGASUS_RX_BUSY;
647 break;
648 case -EPIPE: /* stall, or disconnect from TT */
649 /* FIXME schedule work to clear the halt */
650 netif_warn(pegasus, rx_err, net, "no rx stall recovery\n");
651 return;
652 case -ENOENT:
653 case -ECONNRESET:
654 case -ESHUTDOWN:
655 netif_dbg(pegasus, ifdown, net, "rx unlink, %d\n", status);
656 return;
657 default:
658 netif_dbg(pegasus, rx_err, net, "RX status %d\n", status);
659 goto goon;
660 }
661
662 if (!count || count < 4)
663 goto goon;
664
665 rx_status = buf[count - 2];
666 if (rx_status & 0x1e) {
667 netif_dbg(pegasus, rx_err, net,
668 "RX packet error %x\n", rx_status);
669 pegasus->stats.rx_errors++;
670 if (rx_status & 0x06) /* long or runt */
671 pegasus->stats.rx_length_errors++;
672 if (rx_status & 0x08)
673 pegasus->stats.rx_crc_errors++;
674 if (rx_status & 0x10) /* extra bits */
675 pegasus->stats.rx_frame_errors++;
676 goto goon;
677 }
678 if (pegasus->chip == 0x8513) {
679 pkt_len = le32_to_cpu(*(__le32 *)urb->transfer_buffer);
680 pkt_len &= 0x0fff;
681 pegasus->rx_skb->data += 2;
682 } else {
683 pkt_len = buf[count - 3] << 8;
684 pkt_len += buf[count - 4];
685 pkt_len &= 0xfff;
686 pkt_len -= 8;
687 }
688
689 /*
690 * If the packet is unreasonably long, quietly drop it rather than
691 * kernel panicing by calling skb_put.
692 */
693 if (pkt_len > PEGASUS_MTU)
694 goto goon;
695
696 /*
697 * at this point we are sure pegasus->rx_skb != NULL
698 * so we go ahead and pass up the packet.
699 */
700 skb_put(pegasus->rx_skb, pkt_len);
701 pegasus->rx_skb->protocol = eth_type_trans(pegasus->rx_skb, net);
702 netif_rx(pegasus->rx_skb);
703 pegasus->stats.rx_packets++;
704 pegasus->stats.rx_bytes += pkt_len;
705
706 if (pegasus->flags & PEGASUS_UNPLUG)
707 return;
708
709 spin_lock(&pegasus->rx_pool_lock);
710 pegasus->rx_skb = pull_skb(pegasus);
711 spin_unlock(&pegasus->rx_pool_lock);
712
713 if (pegasus->rx_skb == NULL)
714 goto tl_sched;
715 goon:
716 usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
717 usb_rcvbulkpipe(pegasus->usb, 1),
718 pegasus->rx_skb->data, PEGASUS_MTU + 8,
719 read_bulk_callback, pegasus);
720 rx_status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);
721 if (rx_status == -ENODEV)
722 netif_device_detach(pegasus->net);
723 else if (rx_status) {
724 pegasus->flags |= PEGASUS_RX_URB_FAIL;
725 goto tl_sched;
726 } else {
727 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
728 }
729
730 return;
731
732 tl_sched:
733 tasklet_schedule(&pegasus->rx_tl);
734 }
735
736 static void rx_fixup(unsigned long data)
737 {
738 pegasus_t *pegasus;
739 unsigned long flags;
740 int status;
741
742 pegasus = (pegasus_t *) data;
743 if (pegasus->flags & PEGASUS_UNPLUG)
744 return;
745
746 spin_lock_irqsave(&pegasus->rx_pool_lock, flags);
747 fill_skb_pool(pegasus);
748 if (pegasus->flags & PEGASUS_RX_URB_FAIL)
749 if (pegasus->rx_skb)
750 goto try_again;
751 if (pegasus->rx_skb == NULL)
752 pegasus->rx_skb = pull_skb(pegasus);
753 if (pegasus->rx_skb == NULL) {
754 netif_warn(pegasus, rx_err, pegasus->net, "low on memory\n");
755 tasklet_schedule(&pegasus->rx_tl);
756 goto done;
757 }
758 usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
759 usb_rcvbulkpipe(pegasus->usb, 1),
760 pegasus->rx_skb->data, PEGASUS_MTU + 8,
761 read_bulk_callback, pegasus);
762 try_again:
763 status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);
764 if (status == -ENODEV)
765 netif_device_detach(pegasus->net);
766 else if (status) {
767 pegasus->flags |= PEGASUS_RX_URB_FAIL;
768 tasklet_schedule(&pegasus->rx_tl);
769 } else {
770 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
771 }
772 done:
773 spin_unlock_irqrestore(&pegasus->rx_pool_lock, flags);
774 }
775
776 static void write_bulk_callback(struct urb *urb)
777 {
778 pegasus_t *pegasus = urb->context;
779 struct net_device *net;
780 int status = urb->status;
781
782 if (!pegasus)
783 return;
784
785 net = pegasus->net;
786
787 if (!netif_device_present(net) || !netif_running(net))
788 return;
789
790 switch (status) {
791 case -EPIPE:
792 /* FIXME schedule_work() to clear the tx halt */
793 netif_stop_queue(net);
794 netif_warn(pegasus, tx_err, net, "no tx stall recovery\n");
795 return;
796 case -ENOENT:
797 case -ECONNRESET:
798 case -ESHUTDOWN:
799 netif_dbg(pegasus, ifdown, net, "tx unlink, %d\n", status);
800 return;
801 default:
802 netif_info(pegasus, tx_err, net, "TX status %d\n", status);
803 /* FALL THROUGH */
804 case 0:
805 break;
806 }
807
808 net->trans_start = jiffies; /* prevent tx timeout */
809 netif_wake_queue(net);
810 }
811
812 static void intr_callback(struct urb *urb)
813 {
814 pegasus_t *pegasus = urb->context;
815 struct net_device *net;
816 int res, status = urb->status;
817
818 if (!pegasus)
819 return;
820 net = pegasus->net;
821
822 switch (status) {
823 case 0:
824 break;
825 case -ECONNRESET: /* unlink */
826 case -ENOENT:
827 case -ESHUTDOWN:
828 return;
829 default:
830 /* some Pegasus-I products report LOTS of data
831 * toggle errors... avoid log spamming
832 */
833 netif_dbg(pegasus, timer, net, "intr status %d\n", status);
834 }
835
836 if (urb->actual_length >= 6) {
837 u8 *d = urb->transfer_buffer;
838
839 /* byte 0 == tx_status1, reg 2B */
840 if (d[0] & (TX_UNDERRUN|EXCESSIVE_COL
841 |LATE_COL|JABBER_TIMEOUT)) {
842 pegasus->stats.tx_errors++;
843 if (d[0] & TX_UNDERRUN)
844 pegasus->stats.tx_fifo_errors++;
845 if (d[0] & (EXCESSIVE_COL | JABBER_TIMEOUT))
846 pegasus->stats.tx_aborted_errors++;
847 if (d[0] & LATE_COL)
848 pegasus->stats.tx_window_errors++;
849 }
850
851 /* d[5].LINK_STATUS lies on some adapters.
852 * d[0].NO_CARRIER kicks in only with failed TX.
853 * ... so monitoring with MII may be safest.
854 */
855
856 /* bytes 3-4 == rx_lostpkt, reg 2E/2F */
857 pegasus->stats.rx_missed_errors += ((d[3] & 0x7f) << 8) | d[4];
858 }
859
860 res = usb_submit_urb(urb, GFP_ATOMIC);
861 if (res == -ENODEV)
862 netif_device_detach(pegasus->net);
863 if (res)
864 netif_err(pegasus, timer, net,
865 "can't resubmit interrupt urb, %d\n", res);
866 }
867
868 static void pegasus_tx_timeout(struct net_device *net)
869 {
870 pegasus_t *pegasus = netdev_priv(net);
871 netif_warn(pegasus, timer, net, "tx timeout\n");
872 usb_unlink_urb(pegasus->tx_urb);
873 pegasus->stats.tx_errors++;
874 }
875
876 static netdev_tx_t pegasus_start_xmit(struct sk_buff *skb,
877 struct net_device *net)
878 {
879 pegasus_t *pegasus = netdev_priv(net);
880 int count = ((skb->len + 2) & 0x3f) ? skb->len + 2 : skb->len + 3;
881 int res;
882 __u16 l16 = skb->len;
883
884 netif_stop_queue(net);
885
886 ((__le16 *) pegasus->tx_buff)[0] = cpu_to_le16(l16);
887 skb_copy_from_linear_data(skb, pegasus->tx_buff + 2, skb->len);
888 usb_fill_bulk_urb(pegasus->tx_urb, pegasus->usb,
889 usb_sndbulkpipe(pegasus->usb, 2),
890 pegasus->tx_buff, count,
891 write_bulk_callback, pegasus);
892 if ((res = usb_submit_urb(pegasus->tx_urb, GFP_ATOMIC))) {
893 netif_warn(pegasus, tx_err, net, "fail tx, %d\n", res);
894 switch (res) {
895 case -EPIPE: /* stall, or disconnect from TT */
896 /* cleanup should already have been scheduled */
897 break;
898 case -ENODEV: /* disconnect() upcoming */
899 case -EPERM:
900 netif_device_detach(pegasus->net);
901 break;
902 default:
903 pegasus->stats.tx_errors++;
904 netif_start_queue(net);
905 }
906 } else {
907 pegasus->stats.tx_packets++;
908 pegasus->stats.tx_bytes += skb->len;
909 }
910 dev_kfree_skb(skb);
911
912 return NETDEV_TX_OK;
913 }
914
915 static struct net_device_stats *pegasus_netdev_stats(struct net_device *dev)
916 {
917 return &((pegasus_t *) netdev_priv(dev))->stats;
918 }
919
920 static inline void disable_net_traffic(pegasus_t *pegasus)
921 {
922 __le16 tmp = cpu_to_le16(0);
923
924 set_registers(pegasus, EthCtrl0, sizeof(tmp), &tmp);
925 }
926
927 static inline void get_interrupt_interval(pegasus_t *pegasus)
928 {
929 u16 data;
930 u8 interval;
931
932 read_eprom_word(pegasus, 4, &data);
933 interval = data >> 8;
934 if (pegasus->usb->speed != USB_SPEED_HIGH) {
935 if (interval < 0x80) {
936 netif_info(pegasus, timer, pegasus->net,
937 "intr interval changed from %ums to %ums\n",
938 interval, 0x80);
939 interval = 0x80;
940 data = (data & 0x00FF) | ((u16)interval << 8);
941 #ifdef PEGASUS_WRITE_EEPROM
942 write_eprom_word(pegasus, 4, data);
943 #endif
944 }
945 }
946 pegasus->intr_interval = interval;
947 }
948
949 static void set_carrier(struct net_device *net)
950 {
951 pegasus_t *pegasus = netdev_priv(net);
952 u16 tmp;
953
954 if (read_mii_word(pegasus, pegasus->phy, MII_BMSR, &tmp))
955 return;
956
957 if (tmp & BMSR_LSTATUS)
958 netif_carrier_on(net);
959 else
960 netif_carrier_off(net);
961 }
962
963 static void free_all_urbs(pegasus_t *pegasus)
964 {
965 usb_free_urb(pegasus->intr_urb);
966 usb_free_urb(pegasus->tx_urb);
967 usb_free_urb(pegasus->rx_urb);
968 usb_free_urb(pegasus->ctrl_urb);
969 }
970
971 static void unlink_all_urbs(pegasus_t *pegasus)
972 {
973 usb_kill_urb(pegasus->intr_urb);
974 usb_kill_urb(pegasus->tx_urb);
975 usb_kill_urb(pegasus->rx_urb);
976 usb_kill_urb(pegasus->ctrl_urb);
977 }
978
979 static int alloc_urbs(pegasus_t *pegasus)
980 {
981 pegasus->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
982 if (!pegasus->ctrl_urb)
983 return 0;
984 pegasus->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
985 if (!pegasus->rx_urb) {
986 usb_free_urb(pegasus->ctrl_urb);
987 return 0;
988 }
989 pegasus->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
990 if (!pegasus->tx_urb) {
991 usb_free_urb(pegasus->rx_urb);
992 usb_free_urb(pegasus->ctrl_urb);
993 return 0;
994 }
995 pegasus->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
996 if (!pegasus->intr_urb) {
997 usb_free_urb(pegasus->tx_urb);
998 usb_free_urb(pegasus->rx_urb);
999 usb_free_urb(pegasus->ctrl_urb);
1000 return 0;
1001 }
1002
1003 return 1;
1004 }
1005
1006 static int pegasus_open(struct net_device *net)
1007 {
1008 pegasus_t *pegasus = netdev_priv(net);
1009 int res;
1010
1011 if (pegasus->rx_skb == NULL)
1012 pegasus->rx_skb = pull_skb(pegasus);
1013 /*
1014 ** Note: no point to free the pool. it is empty :-)
1015 */
1016 if (!pegasus->rx_skb)
1017 return -ENOMEM;
1018
1019 res = set_registers(pegasus, EthID, 6, net->dev_addr);
1020
1021 usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
1022 usb_rcvbulkpipe(pegasus->usb, 1),
1023 pegasus->rx_skb->data, PEGASUS_MTU + 8,
1024 read_bulk_callback, pegasus);
1025 if ((res = usb_submit_urb(pegasus->rx_urb, GFP_KERNEL))) {
1026 if (res == -ENODEV)
1027 netif_device_detach(pegasus->net);
1028 netif_dbg(pegasus, ifup, net, "failed rx_urb, %d\n", res);
1029 goto exit;
1030 }
1031
1032 usb_fill_int_urb(pegasus->intr_urb, pegasus->usb,
1033 usb_rcvintpipe(pegasus->usb, 3),
1034 pegasus->intr_buff, sizeof(pegasus->intr_buff),
1035 intr_callback, pegasus, pegasus->intr_interval);
1036 if ((res = usb_submit_urb(pegasus->intr_urb, GFP_KERNEL))) {
1037 if (res == -ENODEV)
1038 netif_device_detach(pegasus->net);
1039 netif_dbg(pegasus, ifup, net, "failed intr_urb, %d\n", res);
1040 usb_kill_urb(pegasus->rx_urb);
1041 goto exit;
1042 }
1043 if ((res = enable_net_traffic(net, pegasus->usb))) {
1044 netif_dbg(pegasus, ifup, net,
1045 "can't enable_net_traffic() - %d\n", res);
1046 res = -EIO;
1047 usb_kill_urb(pegasus->rx_urb);
1048 usb_kill_urb(pegasus->intr_urb);
1049 free_skb_pool(pegasus);
1050 goto exit;
1051 }
1052 set_carrier(net);
1053 netif_start_queue(net);
1054 netif_dbg(pegasus, ifup, net, "open\n");
1055 res = 0;
1056 exit:
1057 return res;
1058 }
1059
1060 static int pegasus_close(struct net_device *net)
1061 {
1062 pegasus_t *pegasus = netdev_priv(net);
1063
1064 netif_stop_queue(net);
1065 if (!(pegasus->flags & PEGASUS_UNPLUG))
1066 disable_net_traffic(pegasus);
1067 tasklet_kill(&pegasus->rx_tl);
1068 unlink_all_urbs(pegasus);
1069
1070 return 0;
1071 }
1072
1073 static void pegasus_get_drvinfo(struct net_device *dev,
1074 struct ethtool_drvinfo *info)
1075 {
1076 pegasus_t *pegasus = netdev_priv(dev);
1077 strncpy(info->driver, driver_name, sizeof(info->driver) - 1);
1078 strncpy(info->version, DRIVER_VERSION, sizeof(info->version) - 1);
1079 usb_make_path(pegasus->usb, info->bus_info, sizeof(info->bus_info));
1080 }
1081
1082 /* also handles three patterns of some kind in hardware */
1083 #define WOL_SUPPORTED (WAKE_MAGIC|WAKE_PHY)
1084
1085 static void
1086 pegasus_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1087 {
1088 pegasus_t *pegasus = netdev_priv(dev);
1089
1090 wol->supported = WAKE_MAGIC | WAKE_PHY;
1091 wol->wolopts = pegasus->wolopts;
1092 }
1093
1094 static int
1095 pegasus_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1096 {
1097 pegasus_t *pegasus = netdev_priv(dev);
1098 u8 reg78 = 0x04;
1099
1100 if (wol->wolopts & ~WOL_SUPPORTED)
1101 return -EINVAL;
1102
1103 if (wol->wolopts & WAKE_MAGIC)
1104 reg78 |= 0x80;
1105 if (wol->wolopts & WAKE_PHY)
1106 reg78 |= 0x40;
1107 /* FIXME this 0x10 bit still needs to get set in the chip... */
1108 if (wol->wolopts)
1109 pegasus->eth_regs[0] |= 0x10;
1110 else
1111 pegasus->eth_regs[0] &= ~0x10;
1112 pegasus->wolopts = wol->wolopts;
1113 return set_register(pegasus, WakeupControl, reg78);
1114 }
1115
1116 static inline void pegasus_reset_wol(struct net_device *dev)
1117 {
1118 struct ethtool_wolinfo wol;
1119
1120 memset(&wol, 0, sizeof wol);
1121 (void) pegasus_set_wol(dev, &wol);
1122 }
1123
1124 static int
1125 pegasus_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1126 {
1127 pegasus_t *pegasus;
1128
1129 pegasus = netdev_priv(dev);
1130 mii_ethtool_gset(&pegasus->mii, ecmd);
1131 return 0;
1132 }
1133
1134 static int
1135 pegasus_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1136 {
1137 pegasus_t *pegasus = netdev_priv(dev);
1138 return mii_ethtool_sset(&pegasus->mii, ecmd);
1139 }
1140
1141 static int pegasus_nway_reset(struct net_device *dev)
1142 {
1143 pegasus_t *pegasus = netdev_priv(dev);
1144 return mii_nway_restart(&pegasus->mii);
1145 }
1146
1147 static u32 pegasus_get_link(struct net_device *dev)
1148 {
1149 pegasus_t *pegasus = netdev_priv(dev);
1150 return mii_link_ok(&pegasus->mii);
1151 }
1152
1153 static u32 pegasus_get_msglevel(struct net_device *dev)
1154 {
1155 pegasus_t *pegasus = netdev_priv(dev);
1156 return pegasus->msg_enable;
1157 }
1158
1159 static void pegasus_set_msglevel(struct net_device *dev, u32 v)
1160 {
1161 pegasus_t *pegasus = netdev_priv(dev);
1162 pegasus->msg_enable = v;
1163 }
1164
1165 static const struct ethtool_ops ops = {
1166 .get_drvinfo = pegasus_get_drvinfo,
1167 .get_settings = pegasus_get_settings,
1168 .set_settings = pegasus_set_settings,
1169 .nway_reset = pegasus_nway_reset,
1170 .get_link = pegasus_get_link,
1171 .get_msglevel = pegasus_get_msglevel,
1172 .set_msglevel = pegasus_set_msglevel,
1173 .get_wol = pegasus_get_wol,
1174 .set_wol = pegasus_set_wol,
1175 };
1176
1177 static int pegasus_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
1178 {
1179 __u16 *data = (__u16 *) &rq->ifr_ifru;
1180 pegasus_t *pegasus = netdev_priv(net);
1181 int res;
1182
1183 switch (cmd) {
1184 case SIOCDEVPRIVATE:
1185 data[0] = pegasus->phy;
1186 case SIOCDEVPRIVATE + 1:
1187 read_mii_word(pegasus, data[0], data[1] & 0x1f, &data[3]);
1188 res = 0;
1189 break;
1190 case SIOCDEVPRIVATE + 2:
1191 if (!capable(CAP_NET_ADMIN))
1192 return -EPERM;
1193 write_mii_word(pegasus, pegasus->phy, data[1] & 0x1f, data[2]);
1194 res = 0;
1195 break;
1196 default:
1197 res = -EOPNOTSUPP;
1198 }
1199 return res;
1200 }
1201
1202 static void pegasus_set_multicast(struct net_device *net)
1203 {
1204 pegasus_t *pegasus = netdev_priv(net);
1205
1206 if (net->flags & IFF_PROMISC) {
1207 pegasus->eth_regs[EthCtrl2] |= RX_PROMISCUOUS;
1208 netif_info(pegasus, link, net, "Promiscuous mode enabled\n");
1209 } else if (!netdev_mc_empty(net) || (net->flags & IFF_ALLMULTI)) {
1210 pegasus->eth_regs[EthCtrl0] |= RX_MULTICAST;
1211 pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1212 netif_dbg(pegasus, link, net, "set allmulti\n");
1213 } else {
1214 pegasus->eth_regs[EthCtrl0] &= ~RX_MULTICAST;
1215 pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1216 }
1217
1218 pegasus->ctrl_urb->status = 0;
1219
1220 pegasus->flags |= ETH_REGS_CHANGE;
1221 ctrl_callback(pegasus->ctrl_urb);
1222 }
1223
1224 static __u8 mii_phy_probe(pegasus_t *pegasus)
1225 {
1226 int i;
1227 __u16 tmp;
1228
1229 for (i = 0; i < 32; i++) {
1230 read_mii_word(pegasus, i, MII_BMSR, &tmp);
1231 if (tmp == 0 || tmp == 0xffff || (tmp & BMSR_MEDIA) == 0)
1232 continue;
1233 else
1234 return i;
1235 }
1236
1237 return 0xff;
1238 }
1239
1240 static inline void setup_pegasus_II(pegasus_t *pegasus)
1241 {
1242 __u8 data = 0xa5;
1243
1244 set_register(pegasus, Reg1d, 0);
1245 set_register(pegasus, Reg7b, 1);
1246 mdelay(100);
1247 if ((pegasus->features & HAS_HOME_PNA) && mii_mode)
1248 set_register(pegasus, Reg7b, 0);
1249 else
1250 set_register(pegasus, Reg7b, 2);
1251
1252 set_register(pegasus, 0x83, data);
1253 get_registers(pegasus, 0x83, 1, &data);
1254
1255 if (data == 0xa5)
1256 pegasus->chip = 0x8513;
1257 else
1258 pegasus->chip = 0;
1259
1260 set_register(pegasus, 0x80, 0xc0);
1261 set_register(pegasus, 0x83, 0xff);
1262 set_register(pegasus, 0x84, 0x01);
1263
1264 if (pegasus->features & HAS_HOME_PNA && mii_mode)
1265 set_register(pegasus, Reg81, 6);
1266 else
1267 set_register(pegasus, Reg81, 2);
1268 }
1269
1270
1271 static int pegasus_count;
1272 static struct workqueue_struct *pegasus_workqueue;
1273 #define CARRIER_CHECK_DELAY (2 * HZ)
1274
1275 static void check_carrier(struct work_struct *work)
1276 {
1277 pegasus_t *pegasus = container_of(work, pegasus_t, carrier_check.work);
1278 set_carrier(pegasus->net);
1279 if (!(pegasus->flags & PEGASUS_UNPLUG)) {
1280 queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1281 CARRIER_CHECK_DELAY);
1282 }
1283 }
1284
1285 static int pegasus_blacklisted(struct usb_device *udev)
1286 {
1287 struct usb_device_descriptor *udd = &udev->descriptor;
1288
1289 /* Special quirk to keep the driver from handling the Belkin Bluetooth
1290 * dongle which happens to have the same ID.
1291 */
1292 if ((udd->idVendor == cpu_to_le16(VENDOR_BELKIN)) &&
1293 (udd->idProduct == cpu_to_le16(0x0121)) &&
1294 (udd->bDeviceClass == USB_CLASS_WIRELESS_CONTROLLER) &&
1295 (udd->bDeviceProtocol == 1))
1296 return 1;
1297
1298 return 0;
1299 }
1300
1301 /* we rely on probe() and remove() being serialized so we
1302 * don't need extra locking on pegasus_count.
1303 */
1304 static void pegasus_dec_workqueue(void)
1305 {
1306 pegasus_count--;
1307 if (pegasus_count == 0) {
1308 destroy_workqueue(pegasus_workqueue);
1309 pegasus_workqueue = NULL;
1310 }
1311 }
1312
1313 static int pegasus_probe(struct usb_interface *intf,
1314 const struct usb_device_id *id)
1315 {
1316 struct usb_device *dev = interface_to_usbdev(intf);
1317 struct net_device *net;
1318 pegasus_t *pegasus;
1319 int dev_index = id - pegasus_ids;
1320 int res = -ENOMEM;
1321
1322 if (pegasus_blacklisted(dev))
1323 return -ENODEV;
1324
1325 if (pegasus_count == 0) {
1326 pegasus_workqueue = create_singlethread_workqueue("pegasus");
1327 if (!pegasus_workqueue)
1328 return -ENOMEM;
1329 }
1330 pegasus_count++;
1331
1332 usb_get_dev(dev);
1333
1334 net = alloc_etherdev(sizeof(struct pegasus));
1335 if (!net) {
1336 dev_err(&intf->dev, "can't allocate %s\n", "device");
1337 goto out;
1338 }
1339
1340 pegasus = netdev_priv(net);
1341 pegasus->dev_index = dev_index;
1342 init_waitqueue_head(&pegasus->ctrl_wait);
1343
1344 if (!alloc_urbs(pegasus)) {
1345 dev_err(&intf->dev, "can't allocate %s\n", "urbs");
1346 goto out1;
1347 }
1348
1349 tasklet_init(&pegasus->rx_tl, rx_fixup, (unsigned long) pegasus);
1350
1351 INIT_DELAYED_WORK(&pegasus->carrier_check, check_carrier);
1352
1353 pegasus->intf = intf;
1354 pegasus->usb = dev;
1355 pegasus->net = net;
1356
1357
1358 net->watchdog_timeo = PEGASUS_TX_TIMEOUT;
1359 net->netdev_ops = &pegasus_netdev_ops;
1360 SET_ETHTOOL_OPS(net, &ops);
1361 pegasus->mii.dev = net;
1362 pegasus->mii.mdio_read = mdio_read;
1363 pegasus->mii.mdio_write = mdio_write;
1364 pegasus->mii.phy_id_mask = 0x1f;
1365 pegasus->mii.reg_num_mask = 0x1f;
1366 spin_lock_init(&pegasus->rx_pool_lock);
1367 pegasus->msg_enable = netif_msg_init(msg_level, NETIF_MSG_DRV
1368 | NETIF_MSG_PROBE | NETIF_MSG_LINK);
1369
1370 pegasus->features = usb_dev_id[dev_index].private;
1371 get_interrupt_interval(pegasus);
1372 if (reset_mac(pegasus)) {
1373 dev_err(&intf->dev, "can't reset MAC\n");
1374 res = -EIO;
1375 goto out2;
1376 }
1377 set_ethernet_addr(pegasus);
1378 fill_skb_pool(pegasus);
1379 if (pegasus->features & PEGASUS_II) {
1380 dev_info(&intf->dev, "setup Pegasus II specific registers\n");
1381 setup_pegasus_II(pegasus);
1382 }
1383 pegasus->phy = mii_phy_probe(pegasus);
1384 if (pegasus->phy == 0xff) {
1385 dev_warn(&intf->dev, "can't locate MII phy, using default\n");
1386 pegasus->phy = 1;
1387 }
1388 pegasus->mii.phy_id = pegasus->phy;
1389 usb_set_intfdata(intf, pegasus);
1390 SET_NETDEV_DEV(net, &intf->dev);
1391 pegasus_reset_wol(net);
1392 res = register_netdev(net);
1393 if (res)
1394 goto out3;
1395 queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1396 CARRIER_CHECK_DELAY);
1397
1398 dev_info(&intf->dev, "%s, %s, %pM\n",
1399 net->name,
1400 usb_dev_id[dev_index].name,
1401 net->dev_addr);
1402 return 0;
1403
1404 out3:
1405 usb_set_intfdata(intf, NULL);
1406 free_skb_pool(pegasus);
1407 out2:
1408 free_all_urbs(pegasus);
1409 out1:
1410 free_netdev(net);
1411 out:
1412 usb_put_dev(dev);
1413 pegasus_dec_workqueue();
1414 return res;
1415 }
1416
1417 static void pegasus_disconnect(struct usb_interface *intf)
1418 {
1419 struct pegasus *pegasus = usb_get_intfdata(intf);
1420
1421 usb_set_intfdata(intf, NULL);
1422 if (!pegasus) {
1423 dev_dbg(&intf->dev, "unregistering non-bound device?\n");
1424 return;
1425 }
1426
1427 pegasus->flags |= PEGASUS_UNPLUG;
1428 cancel_delayed_work(&pegasus->carrier_check);
1429 unregister_netdev(pegasus->net);
1430 usb_put_dev(interface_to_usbdev(intf));
1431 unlink_all_urbs(pegasus);
1432 free_all_urbs(pegasus);
1433 free_skb_pool(pegasus);
1434 if (pegasus->rx_skb != NULL) {
1435 dev_kfree_skb(pegasus->rx_skb);
1436 pegasus->rx_skb = NULL;
1437 }
1438 free_netdev(pegasus->net);
1439 pegasus_dec_workqueue();
1440 }
1441
1442 static int pegasus_suspend(struct usb_interface *intf, pm_message_t message)
1443 {
1444 struct pegasus *pegasus = usb_get_intfdata(intf);
1445
1446 netif_device_detach(pegasus->net);
1447 cancel_delayed_work(&pegasus->carrier_check);
1448 if (netif_running(pegasus->net)) {
1449 usb_kill_urb(pegasus->rx_urb);
1450 usb_kill_urb(pegasus->intr_urb);
1451 }
1452 return 0;
1453 }
1454
1455 static int pegasus_resume(struct usb_interface *intf)
1456 {
1457 struct pegasus *pegasus = usb_get_intfdata(intf);
1458
1459 netif_device_attach(pegasus->net);
1460 if (netif_running(pegasus->net)) {
1461 pegasus->rx_urb->status = 0;
1462 pegasus->rx_urb->actual_length = 0;
1463 read_bulk_callback(pegasus->rx_urb);
1464
1465 pegasus->intr_urb->status = 0;
1466 pegasus->intr_urb->actual_length = 0;
1467 intr_callback(pegasus->intr_urb);
1468 }
1469 queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1470 CARRIER_CHECK_DELAY);
1471 return 0;
1472 }
1473
1474 static const struct net_device_ops pegasus_netdev_ops = {
1475 .ndo_open = pegasus_open,
1476 .ndo_stop = pegasus_close,
1477 .ndo_do_ioctl = pegasus_ioctl,
1478 .ndo_start_xmit = pegasus_start_xmit,
1479 .ndo_set_rx_mode = pegasus_set_multicast,
1480 .ndo_get_stats = pegasus_netdev_stats,
1481 .ndo_tx_timeout = pegasus_tx_timeout,
1482 .ndo_change_mtu = eth_change_mtu,
1483 .ndo_set_mac_address = eth_mac_addr,
1484 .ndo_validate_addr = eth_validate_addr,
1485 };
1486
1487 static struct usb_driver pegasus_driver = {
1488 .name = driver_name,
1489 .probe = pegasus_probe,
1490 .disconnect = pegasus_disconnect,
1491 .id_table = pegasus_ids,
1492 .suspend = pegasus_suspend,
1493 .resume = pegasus_resume,
1494 };
1495
1496 static void __init parse_id(char *id)
1497 {
1498 unsigned int vendor_id = 0, device_id = 0, flags = 0, i = 0;
1499 char *token, *name = NULL;
1500
1501 if ((token = strsep(&id, ":")) != NULL)
1502 name = token;
1503 /* name now points to a null terminated string*/
1504 if ((token = strsep(&id, ":")) != NULL)
1505 vendor_id = simple_strtoul(token, NULL, 16);
1506 if ((token = strsep(&id, ":")) != NULL)
1507 device_id = simple_strtoul(token, NULL, 16);
1508 flags = simple_strtoul(id, NULL, 16);
1509 pr_info("%s: new device %s, vendor ID 0x%04x, device ID 0x%04x, flags: 0x%x\n",
1510 driver_name, name, vendor_id, device_id, flags);
1511
1512 if (vendor_id > 0x10000 || vendor_id == 0)
1513 return;
1514 if (device_id > 0x10000 || device_id == 0)
1515 return;
1516
1517 for (i = 0; usb_dev_id[i].name; i++);
1518 usb_dev_id[i].name = name;
1519 usb_dev_id[i].vendor = vendor_id;
1520 usb_dev_id[i].device = device_id;
1521 usb_dev_id[i].private = flags;
1522 pegasus_ids[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
1523 pegasus_ids[i].idVendor = vendor_id;
1524 pegasus_ids[i].idProduct = device_id;
1525 }
1526
1527 static int __init pegasus_init(void)
1528 {
1529 pr_info("%s: %s, " DRIVER_DESC "\n", driver_name, DRIVER_VERSION);
1530 if (devid)
1531 parse_id(devid);
1532 return usb_register(&pegasus_driver);
1533 }
1534
1535 static void __exit pegasus_exit(void)
1536 {
1537 usb_deregister(&pegasus_driver);
1538 }
1539
1540 module_init(pegasus_init);
1541 module_exit(pegasus_exit);