Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
[linux-2.6.git] / drivers / net / usb / pegasus.c
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 int loopback = 0;
59 static int mii_mode = 0;
60 static char *devid=NULL;
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 (netif_msg_drv(pegasus) && printk_ratelimit())
136                         dev_dbg(&pegasus->intf->dev, "%s, status %d\n",
137                                 __func__, status);
138         }
139         pegasus->flags &= ~ETH_REGS_CHANGED;
140         wake_up(&pegasus->ctrl_wait);
141 }
142
143 static int get_registers(pegasus_t * pegasus, __u16 indx, __u16 size,
144                          void *data)
145 {
146         int ret;
147         char *buffer;
148         DECLARE_WAITQUEUE(wait, current);
149
150         buffer = kmalloc(size, GFP_KERNEL);
151         if (!buffer) {
152                 if (netif_msg_drv(pegasus))
153                         dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
154                                         __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 (netif_msg_drv(pegasus) && printk_ratelimit())
185                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
186                                         __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 = kmalloc(size, GFP_KERNEL);
207         if (!buffer) {
208                 if (netif_msg_drv(pegasus))
209                         dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
210                                         __func__);
211                 return -ENOMEM;
212         }
213         memcpy(buffer, data, size);
214
215         add_wait_queue(&pegasus->ctrl_wait, &wait);
216         set_current_state(TASK_UNINTERRUPTIBLE);
217         while (pegasus->flags & ETH_REGS_CHANGED)
218                 schedule();
219         remove_wait_queue(&pegasus->ctrl_wait, &wait);
220         set_current_state(TASK_RUNNING);
221
222         pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
223         pegasus->dr.bRequest = PEGASUS_REQ_SET_REGS;
224         pegasus->dr.wValue = cpu_to_le16(0);
225         pegasus->dr.wIndex = cpu_to_le16(indx);
226         pegasus->dr.wLength = cpu_to_le16(size);
227         pegasus->ctrl_urb->transfer_buffer_length = size;
228
229         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
230                              usb_sndctrlpipe(pegasus->usb, 0),
231                              (char *) &pegasus->dr,
232                              buffer, size, ctrl_callback, pegasus);
233
234         add_wait_queue(&pegasus->ctrl_wait, &wait);
235         set_current_state(TASK_UNINTERRUPTIBLE);
236
237         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
238                 if (ret == -ENODEV)
239                         netif_device_detach(pegasus->net);
240                 if (netif_msg_drv(pegasus))
241                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
242                                         __func__, ret);
243                 goto out;
244         }
245
246         schedule();
247 out:
248         remove_wait_queue(&pegasus->ctrl_wait, &wait);
249         kfree(buffer);
250
251         return ret;
252 }
253
254 static int set_register(pegasus_t * pegasus, __u16 indx, __u8 data)
255 {
256         int ret;
257         char *tmp;
258         DECLARE_WAITQUEUE(wait, current);
259
260         tmp = kmalloc(1, GFP_KERNEL);
261         if (!tmp) {
262                 if (netif_msg_drv(pegasus))
263                         dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
264                                         __func__);
265                 return -ENOMEM;
266         }
267         memcpy(tmp, &data, 1);
268         add_wait_queue(&pegasus->ctrl_wait, &wait);
269         set_current_state(TASK_UNINTERRUPTIBLE);
270         while (pegasus->flags & ETH_REGS_CHANGED)
271                 schedule();
272         remove_wait_queue(&pegasus->ctrl_wait, &wait);
273         set_current_state(TASK_RUNNING);
274
275         pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
276         pegasus->dr.bRequest = PEGASUS_REQ_SET_REG;
277         pegasus->dr.wValue = cpu_to_le16(data);
278         pegasus->dr.wIndex = cpu_to_le16(indx);
279         pegasus->dr.wLength = cpu_to_le16(1);
280         pegasus->ctrl_urb->transfer_buffer_length = 1;
281
282         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
283                              usb_sndctrlpipe(pegasus->usb, 0),
284                              (char *) &pegasus->dr,
285                              tmp, 1, ctrl_callback, pegasus);
286
287         add_wait_queue(&pegasus->ctrl_wait, &wait);
288         set_current_state(TASK_UNINTERRUPTIBLE);
289
290         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
291                 if (ret == -ENODEV)
292                         netif_device_detach(pegasus->net);
293                 if (netif_msg_drv(pegasus) && printk_ratelimit())
294                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
295                                         __func__, ret);
296                 goto out;
297         }
298
299         schedule();
300 out:
301         remove_wait_queue(&pegasus->ctrl_wait, &wait);
302         kfree(tmp);
303
304         return ret;
305 }
306
307 static int update_eth_regs_async(pegasus_t * pegasus)
308 {
309         int ret;
310
311         pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
312         pegasus->dr.bRequest = PEGASUS_REQ_SET_REGS;
313         pegasus->dr.wValue = cpu_to_le16(0);
314         pegasus->dr.wIndex = cpu_to_le16(EthCtrl0);
315         pegasus->dr.wLength = cpu_to_le16(3);
316         pegasus->ctrl_urb->transfer_buffer_length = 3;
317
318         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
319                              usb_sndctrlpipe(pegasus->usb, 0),
320                              (char *) &pegasus->dr,
321                              pegasus->eth_regs, 3, ctrl_callback, pegasus);
322
323         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
324                 if (ret == -ENODEV)
325                         netif_device_detach(pegasus->net);
326                 if (netif_msg_drv(pegasus))
327                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
328                                         __func__, ret);
329         }
330
331         return ret;
332 }
333
334 /* Returns 0 on success, error on failure */
335 static int read_mii_word(pegasus_t * pegasus, __u8 phy, __u8 indx, __u16 * regd)
336 {
337         int i;
338         __u8 data[4] = { phy, 0, 0, indx };
339         __le16 regdi;
340         int ret;
341
342         set_register(pegasus, PhyCtrl, 0);
343         set_registers(pegasus, PhyAddr, sizeof (data), data);
344         set_register(pegasus, PhyCtrl, (indx | PHY_READ));
345         for (i = 0; i < REG_TIMEOUT; i++) {
346                 ret = get_registers(pegasus, PhyCtrl, 1, data);
347                 if (ret == -ESHUTDOWN)
348                         goto fail;
349                 if (data[0] & PHY_DONE)
350                         break;
351         }
352         if (i < REG_TIMEOUT) {
353                 ret = get_registers(pegasus, PhyData, 2, &regdi);
354                 *regd = le16_to_cpu(regdi);
355                 return ret;
356         }
357 fail:
358         if (netif_msg_drv(pegasus))
359                 dev_warn(&pegasus->intf->dev, "%s failed\n", __func__);
360
361         return ret;
362 }
363
364 static int mdio_read(struct net_device *dev, int phy_id, int loc)
365 {
366         pegasus_t *pegasus = (pegasus_t *) netdev_priv(dev);
367         u16 res;
368
369         read_mii_word(pegasus, phy_id, loc, &res);
370         return (int)res;
371 }
372
373 static int write_mii_word(pegasus_t * pegasus, __u8 phy, __u8 indx, __u16 regd)
374 {
375         int i;
376         __u8 data[4] = { phy, 0, 0, indx };
377         int ret;
378
379         data[1] = (u8) regd;
380         data[2] = (u8) (regd >> 8);
381         set_register(pegasus, PhyCtrl, 0);
382         set_registers(pegasus, PhyAddr, sizeof(data), data);
383         set_register(pegasus, PhyCtrl, (indx | PHY_WRITE));
384         for (i = 0; i < REG_TIMEOUT; i++) {
385                 ret = get_registers(pegasus, PhyCtrl, 1, data);
386                 if (ret == -ESHUTDOWN)
387                         goto fail;
388                 if (data[0] & PHY_DONE)
389                         break;
390         }
391         if (i < REG_TIMEOUT)
392                 return ret;
393
394 fail:
395         if (netif_msg_drv(pegasus))
396                 dev_warn(&pegasus->intf->dev, "%s failed\n", __func__);
397         return -ETIMEDOUT;
398 }
399
400 static void mdio_write(struct net_device *dev, int phy_id, int loc, int val)
401 {
402         pegasus_t *pegasus = (pegasus_t *) netdev_priv(dev);
403
404         write_mii_word(pegasus, phy_id, loc, val);
405 }
406
407 static int read_eprom_word(pegasus_t * pegasus, __u8 index, __u16 * retdata)
408 {
409         int i;
410         __u8 tmp;
411         __le16 retdatai;
412         int ret;
413
414         set_register(pegasus, EpromCtrl, 0);
415         set_register(pegasus, EpromOffset, index);
416         set_register(pegasus, EpromCtrl, EPROM_READ);
417
418         for (i = 0; i < REG_TIMEOUT; i++) {
419                 ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
420                 if (tmp & EPROM_DONE)
421                         break;
422                 if (ret == -ESHUTDOWN)
423                         goto fail;
424         }
425         if (i < REG_TIMEOUT) {
426                 ret = get_registers(pegasus, EpromData, 2, &retdatai);
427                 *retdata = le16_to_cpu(retdatai);
428                 return ret;
429         }
430
431 fail:
432         if (netif_msg_drv(pegasus))
433                 dev_warn(&pegasus->intf->dev, "%s failed\n", __func__);
434         return -ETIMEDOUT;
435 }
436
437 #ifdef  PEGASUS_WRITE_EEPROM
438 static inline void enable_eprom_write(pegasus_t * pegasus)
439 {
440         __u8 tmp;
441         int ret;
442
443         get_registers(pegasus, EthCtrl2, 1, &tmp);
444         set_register(pegasus, EthCtrl2, tmp | EPROM_WR_ENABLE);
445 }
446
447 static inline void disable_eprom_write(pegasus_t * pegasus)
448 {
449         __u8 tmp;
450         int ret;
451
452         get_registers(pegasus, EthCtrl2, 1, &tmp);
453         set_register(pegasus, EpromCtrl, 0);
454         set_register(pegasus, EthCtrl2, tmp & ~EPROM_WR_ENABLE);
455 }
456
457 static int write_eprom_word(pegasus_t * pegasus, __u8 index, __u16 data)
458 {
459         int i;
460         __u8 tmp, d[4] = { 0x3f, 0, 0, EPROM_WRITE };
461         int ret;
462         __le16 le_data = cpu_to_le16(data);
463
464         set_registers(pegasus, EpromOffset, 4, d);
465         enable_eprom_write(pegasus);
466         set_register(pegasus, EpromOffset, index);
467         set_registers(pegasus, EpromData, 2, &le_data);
468         set_register(pegasus, EpromCtrl, EPROM_WRITE);
469
470         for (i = 0; i < REG_TIMEOUT; i++) {
471                 ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
472                 if (ret == -ESHUTDOWN)
473                         goto fail;
474                 if (tmp & EPROM_DONE)
475                         break;
476         }
477         disable_eprom_write(pegasus);
478         if (i < REG_TIMEOUT)
479                 return ret;
480 fail:
481         if (netif_msg_drv(pegasus))
482                 dev_warn(&pegasus->intf->dev, "%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 & 1)
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 & 1) ? 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                 if (netif_msg_rx_err(pegasus))
646                         pr_debug("%s: reset MAC\n", net->name);
647                 pegasus->flags &= ~PEGASUS_RX_BUSY;
648                 break;
649         case -EPIPE:            /* stall, or disconnect from TT */
650                 /* FIXME schedule work to clear the halt */
651                 if (netif_msg_rx_err(pegasus))
652                         printk(KERN_WARNING "%s: no rx stall recovery\n",
653                                         net->name);
654                 return;
655         case -ENOENT:
656         case -ECONNRESET:
657         case -ESHUTDOWN:
658                 if (netif_msg_ifdown(pegasus))
659                         pr_debug("%s: rx unlink, %d\n", net->name, status);
660                 return;
661         default:
662                 if (netif_msg_rx_err(pegasus))
663                         pr_debug("%s: RX status %d\n", net->name, status);
664                 goto goon;
665         }
666
667         if (!count || count < 4)
668                 goto goon;
669
670         rx_status = buf[count - 2];
671         if (rx_status & 0x1e) {
672                 if (netif_msg_rx_err(pegasus))
673                         pr_debug("%s: RX packet error %x\n",
674                                         net->name, rx_status);
675                 pegasus->stats.rx_errors++;
676                 if (rx_status & 0x06)   // long or runt
677                         pegasus->stats.rx_length_errors++;
678                 if (rx_status & 0x08)
679                         pegasus->stats.rx_crc_errors++;
680                 if (rx_status & 0x10)   // extra bits
681                         pegasus->stats.rx_frame_errors++;
682                 goto goon;
683         }
684         if (pegasus->chip == 0x8513) {
685                 pkt_len = le32_to_cpu(*(__le32 *)urb->transfer_buffer);
686                 pkt_len &= 0x0fff;
687                 pegasus->rx_skb->data += 2;
688         } else {
689                 pkt_len = buf[count - 3] << 8;
690                 pkt_len += buf[count - 4];
691                 pkt_len &= 0xfff;
692                 pkt_len -= 8;
693         }
694
695         /*
696          * If the packet is unreasonably long, quietly drop it rather than
697          * kernel panicing by calling skb_put.
698          */
699         if (pkt_len > PEGASUS_MTU)
700                 goto goon;
701
702         /*
703          * at this point we are sure pegasus->rx_skb != NULL
704          * so we go ahead and pass up the packet.
705          */
706         skb_put(pegasus->rx_skb, pkt_len);
707         pegasus->rx_skb->protocol = eth_type_trans(pegasus->rx_skb, net);
708         netif_rx(pegasus->rx_skb);
709         pegasus->stats.rx_packets++;
710         pegasus->stats.rx_bytes += pkt_len;
711
712         if (pegasus->flags & PEGASUS_UNPLUG)
713                 return;
714
715         spin_lock(&pegasus->rx_pool_lock);
716         pegasus->rx_skb = pull_skb(pegasus);
717         spin_unlock(&pegasus->rx_pool_lock);
718
719         if (pegasus->rx_skb == NULL)
720                 goto tl_sched;
721 goon:
722         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
723                           usb_rcvbulkpipe(pegasus->usb, 1),
724                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
725                           read_bulk_callback, pegasus);
726         rx_status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);
727         if (rx_status == -ENODEV)
728                 netif_device_detach(pegasus->net);
729         else if (rx_status) {
730                 pegasus->flags |= PEGASUS_RX_URB_FAIL;
731                 goto tl_sched;
732         } else {
733                 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
734         }
735
736         return;
737
738 tl_sched:
739         tasklet_schedule(&pegasus->rx_tl);
740 }
741
742 static void rx_fixup(unsigned long data)
743 {
744         pegasus_t *pegasus;
745         unsigned long flags;
746         int status;
747
748         pegasus = (pegasus_t *) data;
749         if (pegasus->flags & PEGASUS_UNPLUG)
750                 return;
751
752         spin_lock_irqsave(&pegasus->rx_pool_lock, flags);
753         fill_skb_pool(pegasus);
754         if (pegasus->flags & PEGASUS_RX_URB_FAIL)
755                 if (pegasus->rx_skb)
756                         goto try_again;
757         if (pegasus->rx_skb == NULL) {
758                 pegasus->rx_skb = pull_skb(pegasus);
759         }
760         if (pegasus->rx_skb == NULL) {
761                 if (netif_msg_rx_err(pegasus))
762                         printk(KERN_WARNING "%s: low on memory\n",
763                                         pegasus->net->name);
764                 tasklet_schedule(&pegasus->rx_tl);
765                 goto done;
766         }
767         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
768                           usb_rcvbulkpipe(pegasus->usb, 1),
769                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
770                           read_bulk_callback, pegasus);
771 try_again:
772         status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);
773         if (status == -ENODEV)
774                 netif_device_detach(pegasus->net);
775         else if (status) {
776                 pegasus->flags |= PEGASUS_RX_URB_FAIL;
777                 tasklet_schedule(&pegasus->rx_tl);
778         } else {
779                 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
780         }
781 done:
782         spin_unlock_irqrestore(&pegasus->rx_pool_lock, flags);
783 }
784
785 static void write_bulk_callback(struct urb *urb)
786 {
787         pegasus_t *pegasus = urb->context;
788         struct net_device *net;
789         int status = urb->status;
790
791         if (!pegasus)
792                 return;
793
794         net = pegasus->net;
795
796         if (!netif_device_present(net) || !netif_running(net))
797                 return;
798
799         switch (status) {
800         case -EPIPE:
801                 /* FIXME schedule_work() to clear the tx halt */
802                 netif_stop_queue(net);
803                 if (netif_msg_tx_err(pegasus))
804                         printk(KERN_WARNING "%s: no tx stall recovery\n",
805                                         net->name);
806                 return;
807         case -ENOENT:
808         case -ECONNRESET:
809         case -ESHUTDOWN:
810                 if (netif_msg_ifdown(pegasus))
811                         pr_debug("%s: tx unlink, %d\n", net->name, status);
812                 return;
813         default:
814                 if (netif_msg_tx_err(pegasus))
815                         pr_info("%s: TX status %d\n", net->name, status);
816                 /* FALL THROUGH */
817         case 0:
818                 break;
819         }
820
821         net->trans_start = jiffies;
822         netif_wake_queue(net);
823 }
824
825 static void intr_callback(struct urb *urb)
826 {
827         pegasus_t *pegasus = urb->context;
828         struct net_device *net;
829         int res, status = urb->status;
830
831         if (!pegasus)
832                 return;
833         net = pegasus->net;
834
835         switch (status) {
836         case 0:
837                 break;
838         case -ECONNRESET:       /* unlink */
839         case -ENOENT:
840         case -ESHUTDOWN:
841                 return;
842         default:
843                 /* some Pegasus-I products report LOTS of data
844                  * toggle errors... avoid log spamming
845                  */
846                 if (netif_msg_timer(pegasus))
847                         pr_debug("%s: intr status %d\n", net->name,
848                                         status);
849         }
850
851         if (urb->actual_length >= 6) {
852                 u8      * d = urb->transfer_buffer;
853
854                 /* byte 0 == tx_status1, reg 2B */
855                 if (d[0] & (TX_UNDERRUN|EXCESSIVE_COL
856                                         |LATE_COL|JABBER_TIMEOUT)) {
857                         pegasus->stats.tx_errors++;
858                         if (d[0] & TX_UNDERRUN)
859                                 pegasus->stats.tx_fifo_errors++;
860                         if (d[0] & (EXCESSIVE_COL | JABBER_TIMEOUT))
861                                 pegasus->stats.tx_aborted_errors++;
862                         if (d[0] & LATE_COL)
863                                 pegasus->stats.tx_window_errors++;
864                 }
865
866                 /* d[5].LINK_STATUS lies on some adapters.
867                  * d[0].NO_CARRIER kicks in only with failed TX.
868                  * ... so monitoring with MII may be safest.
869                  */
870
871                 /* bytes 3-4 == rx_lostpkt, reg 2E/2F */
872                 pegasus->stats.rx_missed_errors += ((d[3] & 0x7f) << 8) | d[4];
873         }
874
875         res = usb_submit_urb(urb, GFP_ATOMIC);
876         if (res == -ENODEV)
877                 netif_device_detach(pegasus->net);
878         if (res && netif_msg_timer(pegasus))
879                 printk(KERN_ERR "%s: can't resubmit interrupt urb, %d\n",
880                                 net->name, res);
881 }
882
883 static void pegasus_tx_timeout(struct net_device *net)
884 {
885         pegasus_t *pegasus = netdev_priv(net);
886         if (netif_msg_timer(pegasus))
887                 printk(KERN_WARNING "%s: tx timeout\n", net->name);
888         usb_unlink_urb(pegasus->tx_urb);
889         pegasus->stats.tx_errors++;
890 }
891
892 static netdev_tx_t pegasus_start_xmit(struct sk_buff *skb,
893                                             struct net_device *net)
894 {
895         pegasus_t *pegasus = netdev_priv(net);
896         int count = ((skb->len + 2) & 0x3f) ? skb->len + 2 : skb->len + 3;
897         int res;
898         __u16 l16 = skb->len;
899
900         netif_stop_queue(net);
901
902         ((__le16 *) pegasus->tx_buff)[0] = cpu_to_le16(l16);
903         skb_copy_from_linear_data(skb, pegasus->tx_buff + 2, skb->len);
904         usb_fill_bulk_urb(pegasus->tx_urb, pegasus->usb,
905                           usb_sndbulkpipe(pegasus->usb, 2),
906                           pegasus->tx_buff, count,
907                           write_bulk_callback, pegasus);
908         if ((res = usb_submit_urb(pegasus->tx_urb, GFP_ATOMIC))) {
909                 if (netif_msg_tx_err(pegasus))
910                         printk(KERN_WARNING "%s: fail tx, %d\n",
911                                         net->name, res);
912                 switch (res) {
913                 case -EPIPE:            /* stall, or disconnect from TT */
914                         /* cleanup should already have been scheduled */
915                         break;
916                 case -ENODEV:           /* disconnect() upcoming */
917                 case -EPERM:
918                         netif_device_detach(pegasus->net);
919                         break;
920                 default:
921                         pegasus->stats.tx_errors++;
922                         netif_start_queue(net);
923                 }
924         } else {
925                 pegasus->stats.tx_packets++;
926                 pegasus->stats.tx_bytes += skb->len;
927                 net->trans_start = jiffies;
928         }
929         dev_kfree_skb(skb);
930
931         return NETDEV_TX_OK;
932 }
933
934 static struct net_device_stats *pegasus_netdev_stats(struct net_device *dev)
935 {
936         return &((pegasus_t *) netdev_priv(dev))->stats;
937 }
938
939 static inline void disable_net_traffic(pegasus_t * pegasus)
940 {
941         __le16 tmp = cpu_to_le16(0);
942
943         set_registers(pegasus, EthCtrl0, sizeof(tmp), &tmp);
944 }
945
946 static inline void get_interrupt_interval(pegasus_t * pegasus)
947 {
948         u16 data;
949         u8 interval;
950
951         read_eprom_word(pegasus, 4, &data);
952         interval = data >> 8;
953         if (pegasus->usb->speed != USB_SPEED_HIGH) {
954                 if (interval < 0x80) {
955                         if (netif_msg_timer(pegasus))
956                                 dev_info(&pegasus->intf->dev, "intr interval "
957                                         "changed from %ums to %ums\n",
958                                         interval, 0x80);
959                         interval = 0x80;
960                         data = (data & 0x00FF) | ((u16)interval << 8);
961 #ifdef PEGASUS_WRITE_EEPROM
962                         write_eprom_word(pegasus, 4, data);
963 #endif
964                 }
965         }
966         pegasus->intr_interval = interval;
967 }
968
969 static void set_carrier(struct net_device *net)
970 {
971         pegasus_t *pegasus = netdev_priv(net);
972         u16 tmp;
973
974         if (read_mii_word(pegasus, pegasus->phy, MII_BMSR, &tmp))
975                 return;
976
977         if (tmp & BMSR_LSTATUS)
978                 netif_carrier_on(net);
979         else
980                 netif_carrier_off(net);
981 }
982
983 static void free_all_urbs(pegasus_t * pegasus)
984 {
985         usb_free_urb(pegasus->intr_urb);
986         usb_free_urb(pegasus->tx_urb);
987         usb_free_urb(pegasus->rx_urb);
988         usb_free_urb(pegasus->ctrl_urb);
989 }
990
991 static void unlink_all_urbs(pegasus_t * pegasus)
992 {
993         usb_kill_urb(pegasus->intr_urb);
994         usb_kill_urb(pegasus->tx_urb);
995         usb_kill_urb(pegasus->rx_urb);
996         usb_kill_urb(pegasus->ctrl_urb);
997 }
998
999 static int alloc_urbs(pegasus_t * pegasus)
1000 {
1001         pegasus->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
1002         if (!pegasus->ctrl_urb) {
1003                 return 0;
1004         }
1005         pegasus->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1006         if (!pegasus->rx_urb) {
1007                 usb_free_urb(pegasus->ctrl_urb);
1008                 return 0;
1009         }
1010         pegasus->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1011         if (!pegasus->tx_urb) {
1012                 usb_free_urb(pegasus->rx_urb);
1013                 usb_free_urb(pegasus->ctrl_urb);
1014                 return 0;
1015         }
1016         pegasus->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
1017         if (!pegasus->intr_urb) {
1018                 usb_free_urb(pegasus->tx_urb);
1019                 usb_free_urb(pegasus->rx_urb);
1020                 usb_free_urb(pegasus->ctrl_urb);
1021                 return 0;
1022         }
1023
1024         return 1;
1025 }
1026
1027 static int pegasus_open(struct net_device *net)
1028 {
1029         pegasus_t *pegasus = netdev_priv(net);
1030         int res;
1031
1032         if (pegasus->rx_skb == NULL)
1033                 pegasus->rx_skb = pull_skb(pegasus);
1034         /*
1035          ** Note: no point to free the pool.  it is empty :-)
1036          */
1037         if (!pegasus->rx_skb)
1038                 return -ENOMEM;
1039
1040         res = set_registers(pegasus, EthID, 6, net->dev_addr);
1041         
1042         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
1043                           usb_rcvbulkpipe(pegasus->usb, 1),
1044                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
1045                           read_bulk_callback, pegasus);
1046         if ((res = usb_submit_urb(pegasus->rx_urb, GFP_KERNEL))) {
1047                 if (res == -ENODEV)
1048                         netif_device_detach(pegasus->net);
1049                 if (netif_msg_ifup(pegasus))
1050                         pr_debug("%s: failed rx_urb, %d", net->name, res);
1051                 goto exit;
1052         }
1053
1054         usb_fill_int_urb(pegasus->intr_urb, pegasus->usb,
1055                          usb_rcvintpipe(pegasus->usb, 3),
1056                          pegasus->intr_buff, sizeof (pegasus->intr_buff),
1057                          intr_callback, pegasus, pegasus->intr_interval);
1058         if ((res = usb_submit_urb(pegasus->intr_urb, GFP_KERNEL))) {
1059                 if (res == -ENODEV)
1060                         netif_device_detach(pegasus->net);
1061                 if (netif_msg_ifup(pegasus))
1062                         pr_debug("%s: failed intr_urb, %d\n", net->name, res);
1063                 usb_kill_urb(pegasus->rx_urb);
1064                 goto exit;
1065         }
1066         if ((res = enable_net_traffic(net, pegasus->usb))) {
1067                 if (netif_msg_ifup(pegasus))
1068                         pr_debug("%s: can't enable_net_traffic() - %d\n",
1069                                         net->name, res);
1070                 res = -EIO;
1071                 usb_kill_urb(pegasus->rx_urb);
1072                 usb_kill_urb(pegasus->intr_urb);
1073                 free_skb_pool(pegasus);
1074                 goto exit;
1075         }
1076         set_carrier(net);
1077         netif_start_queue(net);
1078         if (netif_msg_ifup(pegasus))
1079                 pr_debug("%s: open\n", net->name);
1080         res = 0;
1081 exit:
1082         return res;
1083 }
1084
1085 static int pegasus_close(struct net_device *net)
1086 {
1087         pegasus_t *pegasus = netdev_priv(net);
1088
1089         netif_stop_queue(net);
1090         if (!(pegasus->flags & PEGASUS_UNPLUG))
1091                 disable_net_traffic(pegasus);
1092         tasklet_kill(&pegasus->rx_tl);
1093         unlink_all_urbs(pegasus);
1094
1095         return 0;
1096 }
1097
1098 static void pegasus_get_drvinfo(struct net_device *dev,
1099                                 struct ethtool_drvinfo *info)
1100 {
1101         pegasus_t *pegasus = netdev_priv(dev);
1102         strncpy(info->driver, driver_name, sizeof (info->driver) - 1);
1103         strncpy(info->version, DRIVER_VERSION, sizeof (info->version) - 1);
1104         usb_make_path(pegasus->usb, info->bus_info, sizeof (info->bus_info));
1105 }
1106
1107 /* also handles three patterns of some kind in hardware */
1108 #define WOL_SUPPORTED   (WAKE_MAGIC|WAKE_PHY)
1109
1110 static void
1111 pegasus_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1112 {
1113         pegasus_t       *pegasus = netdev_priv(dev);
1114
1115         wol->supported = WAKE_MAGIC | WAKE_PHY;
1116         wol->wolopts = pegasus->wolopts;
1117 }
1118
1119 static int
1120 pegasus_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1121 {
1122         pegasus_t       *pegasus = netdev_priv(dev);
1123         u8              reg78 = 0x04;
1124         
1125         if (wol->wolopts & ~WOL_SUPPORTED)
1126                 return -EINVAL;
1127
1128         if (wol->wolopts & WAKE_MAGIC)
1129                 reg78 |= 0x80;
1130         if (wol->wolopts & WAKE_PHY)
1131                 reg78 |= 0x40;
1132         /* FIXME this 0x10 bit still needs to get set in the chip... */
1133         if (wol->wolopts)
1134                 pegasus->eth_regs[0] |= 0x10;
1135         else
1136                 pegasus->eth_regs[0] &= ~0x10;
1137         pegasus->wolopts = wol->wolopts;
1138         return set_register(pegasus, WakeupControl, reg78);
1139 }
1140
1141 static inline void pegasus_reset_wol(struct net_device *dev)
1142 {
1143         struct ethtool_wolinfo wol;
1144         
1145         memset(&wol, 0, sizeof wol);
1146         (void) pegasus_set_wol(dev, &wol);
1147 }
1148
1149 static int
1150 pegasus_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1151 {
1152         pegasus_t *pegasus;
1153
1154         pegasus = netdev_priv(dev);
1155         mii_ethtool_gset(&pegasus->mii, ecmd);
1156         return 0;
1157 }
1158
1159 static int
1160 pegasus_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1161 {
1162         pegasus_t *pegasus = netdev_priv(dev);
1163         return mii_ethtool_sset(&pegasus->mii, ecmd);
1164 }
1165
1166 static int pegasus_nway_reset(struct net_device *dev)
1167 {
1168         pegasus_t *pegasus = netdev_priv(dev);
1169         return mii_nway_restart(&pegasus->mii);
1170 }
1171
1172 static u32 pegasus_get_link(struct net_device *dev)
1173 {
1174         pegasus_t *pegasus = netdev_priv(dev);
1175         return mii_link_ok(&pegasus->mii);
1176 }
1177
1178 static u32 pegasus_get_msglevel(struct net_device *dev)
1179 {
1180         pegasus_t *pegasus = netdev_priv(dev);
1181         return pegasus->msg_enable;
1182 }
1183
1184 static void pegasus_set_msglevel(struct net_device *dev, u32 v)
1185 {
1186         pegasus_t *pegasus = netdev_priv(dev);
1187         pegasus->msg_enable = v;
1188 }
1189
1190 static const struct ethtool_ops ops = {
1191         .get_drvinfo = pegasus_get_drvinfo,
1192         .get_settings = pegasus_get_settings,
1193         .set_settings = pegasus_set_settings,
1194         .nway_reset = pegasus_nway_reset,
1195         .get_link = pegasus_get_link,
1196         .get_msglevel = pegasus_get_msglevel,
1197         .set_msglevel = pegasus_set_msglevel,
1198         .get_wol = pegasus_get_wol,
1199         .set_wol = pegasus_set_wol,
1200 };
1201
1202 static int pegasus_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
1203 {
1204         __u16 *data = (__u16 *) & rq->ifr_ifru;
1205         pegasus_t *pegasus = netdev_priv(net);
1206         int res;
1207
1208         switch (cmd) {
1209         case SIOCDEVPRIVATE:
1210                 data[0] = pegasus->phy;
1211         case SIOCDEVPRIVATE + 1:
1212                 read_mii_word(pegasus, data[0], data[1] & 0x1f, &data[3]);
1213                 res = 0;
1214                 break;
1215         case SIOCDEVPRIVATE + 2:
1216                 if (!capable(CAP_NET_ADMIN))
1217                         return -EPERM;
1218                 write_mii_word(pegasus, pegasus->phy, data[1] & 0x1f, data[2]);
1219                 res = 0;
1220                 break;
1221         default:
1222                 res = -EOPNOTSUPP;
1223         }
1224         return res;
1225 }
1226
1227 static void pegasus_set_multicast(struct net_device *net)
1228 {
1229         pegasus_t *pegasus = netdev_priv(net);
1230
1231         if (net->flags & IFF_PROMISC) {
1232                 pegasus->eth_regs[EthCtrl2] |= RX_PROMISCUOUS;
1233                 if (netif_msg_link(pegasus))
1234                         pr_info("%s: Promiscuous mode enabled.\n", net->name);
1235         } else if (net->mc_count || (net->flags & IFF_ALLMULTI)) {
1236                 pegasus->eth_regs[EthCtrl0] |= RX_MULTICAST;
1237                 pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1238                 if (netif_msg_link(pegasus))
1239                         pr_debug("%s: set allmulti\n", net->name);
1240         } else {
1241                 pegasus->eth_regs[EthCtrl0] &= ~RX_MULTICAST;
1242                 pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1243         }
1244
1245         pegasus->ctrl_urb->status = 0;
1246
1247         pegasus->flags |= ETH_REGS_CHANGE;
1248         ctrl_callback(pegasus->ctrl_urb);
1249 }
1250
1251 static __u8 mii_phy_probe(pegasus_t * pegasus)
1252 {
1253         int i;
1254         __u16 tmp;
1255
1256         for (i = 0; i < 32; i++) {
1257                 read_mii_word(pegasus, i, MII_BMSR, &tmp);
1258                 if (tmp == 0 || tmp == 0xffff || (tmp & BMSR_MEDIA) == 0)
1259                         continue;
1260                 else
1261                         return i;
1262         }
1263
1264         return 0xff;
1265 }
1266
1267 static inline void setup_pegasus_II(pegasus_t * pegasus)
1268 {
1269         __u8 data = 0xa5;
1270         
1271         set_register(pegasus, Reg1d, 0);
1272         set_register(pegasus, Reg7b, 1);
1273         mdelay(100);
1274         if ((pegasus->features & HAS_HOME_PNA) && mii_mode)
1275                 set_register(pegasus, Reg7b, 0);
1276         else
1277                 set_register(pegasus, Reg7b, 2);
1278
1279         set_register(pegasus, 0x83, data);
1280         get_registers(pegasus, 0x83, 1, &data);
1281
1282         if (data == 0xa5) {
1283                 pegasus->chip = 0x8513;
1284         } else {
1285                 pegasus->chip = 0;
1286         }
1287
1288         set_register(pegasus, 0x80, 0xc0);
1289         set_register(pegasus, 0x83, 0xff);
1290         set_register(pegasus, 0x84, 0x01);
1291         
1292         if (pegasus->features & HAS_HOME_PNA && mii_mode)
1293                 set_register(pegasus, Reg81, 6);
1294         else
1295                 set_register(pegasus, Reg81, 2);
1296 }
1297
1298
1299 static int pegasus_count;
1300 static struct workqueue_struct *pegasus_workqueue = NULL;
1301 #define CARRIER_CHECK_DELAY (2 * HZ)
1302
1303 static void check_carrier(struct work_struct *work)
1304 {
1305         pegasus_t *pegasus = container_of(work, pegasus_t, carrier_check.work);
1306         set_carrier(pegasus->net);
1307         if (!(pegasus->flags & PEGASUS_UNPLUG)) {
1308                 queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1309                         CARRIER_CHECK_DELAY);
1310         }
1311 }
1312
1313 static int pegasus_blacklisted(struct usb_device *udev)
1314 {
1315         struct usb_device_descriptor *udd = &udev->descriptor;
1316
1317         /* Special quirk to keep the driver from handling the Belkin Bluetooth
1318          * dongle which happens to have the same ID.
1319          */
1320         if ((udd->idVendor == cpu_to_le16(VENDOR_BELKIN)) &&
1321             (udd->idProduct == cpu_to_le16(0x0121)) &&
1322             (udd->bDeviceClass == USB_CLASS_WIRELESS_CONTROLLER) &&
1323             (udd->bDeviceProtocol == 1))
1324                 return 1;
1325
1326         return 0;
1327 }
1328
1329 /* we rely on probe() and remove() being serialized so we
1330  * don't need extra locking on pegasus_count.
1331  */
1332 static void pegasus_dec_workqueue(void)
1333 {
1334         pegasus_count--;
1335         if (pegasus_count == 0) {
1336                 destroy_workqueue(pegasus_workqueue);
1337                 pegasus_workqueue = NULL;
1338         }
1339 }
1340
1341 static int pegasus_probe(struct usb_interface *intf,
1342                          const struct usb_device_id *id)
1343 {
1344         struct usb_device *dev = interface_to_usbdev(intf);
1345         struct net_device *net;
1346         pegasus_t *pegasus;
1347         int dev_index = id - pegasus_ids;
1348         int res = -ENOMEM;
1349
1350         if (pegasus_blacklisted(dev))
1351                 return -ENODEV;
1352
1353         if (pegasus_count == 0) {
1354                 pegasus_workqueue = create_singlethread_workqueue("pegasus");
1355                 if (!pegasus_workqueue)
1356                         return -ENOMEM;
1357         }
1358         pegasus_count++;
1359
1360         usb_get_dev(dev);
1361
1362         net = alloc_etherdev(sizeof(struct pegasus));
1363         if (!net) {
1364                 dev_err(&intf->dev, "can't allocate %s\n", "device");
1365                 goto out;
1366         }
1367
1368         pegasus = netdev_priv(net);
1369         pegasus->dev_index = dev_index;
1370         init_waitqueue_head(&pegasus->ctrl_wait);
1371
1372         if (!alloc_urbs(pegasus)) {
1373                 dev_err(&intf->dev, "can't allocate %s\n", "urbs");
1374                 goto out1;
1375         }
1376
1377         tasklet_init(&pegasus->rx_tl, rx_fixup, (unsigned long) pegasus);
1378
1379         INIT_DELAYED_WORK(&pegasus->carrier_check, check_carrier);
1380
1381         pegasus->intf = intf;
1382         pegasus->usb = dev;
1383         pegasus->net = net;
1384
1385
1386         net->watchdog_timeo = PEGASUS_TX_TIMEOUT;
1387         net->netdev_ops = &pegasus_netdev_ops;
1388         SET_ETHTOOL_OPS(net, &ops);
1389         pegasus->mii.dev = net;
1390         pegasus->mii.mdio_read = mdio_read;
1391         pegasus->mii.mdio_write = mdio_write;
1392         pegasus->mii.phy_id_mask = 0x1f;
1393         pegasus->mii.reg_num_mask = 0x1f;
1394         spin_lock_init(&pegasus->rx_pool_lock);
1395         pegasus->msg_enable = netif_msg_init (msg_level, NETIF_MSG_DRV
1396                                 | NETIF_MSG_PROBE | NETIF_MSG_LINK);
1397
1398         pegasus->features = usb_dev_id[dev_index].private;
1399         get_interrupt_interval(pegasus);
1400         if (reset_mac(pegasus)) {
1401                 dev_err(&intf->dev, "can't reset MAC\n");
1402                 res = -EIO;
1403                 goto out2;
1404         }
1405         set_ethernet_addr(pegasus);
1406         fill_skb_pool(pegasus);
1407         if (pegasus->features & PEGASUS_II) {
1408                 dev_info(&intf->dev, "setup Pegasus II specific registers\n");
1409                 setup_pegasus_II(pegasus);
1410         }
1411         pegasus->phy = mii_phy_probe(pegasus);
1412         if (pegasus->phy == 0xff) {
1413                 dev_warn(&intf->dev, "can't locate MII phy, using default\n");
1414                 pegasus->phy = 1;
1415         }
1416         pegasus->mii.phy_id = pegasus->phy;
1417         usb_set_intfdata(intf, pegasus);
1418         SET_NETDEV_DEV(net, &intf->dev);
1419         pegasus_reset_wol(net);
1420         res = register_netdev(net);
1421         if (res)
1422                 goto out3;
1423         queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1424                                 CARRIER_CHECK_DELAY);
1425
1426         dev_info(&intf->dev, "%s, %s, %pM\n",
1427                  net->name,
1428                  usb_dev_id[dev_index].name,
1429                  net->dev_addr);
1430         return 0;
1431
1432 out3:
1433         usb_set_intfdata(intf, NULL);
1434         free_skb_pool(pegasus);
1435 out2:
1436         free_all_urbs(pegasus);
1437 out1:
1438         free_netdev(net);
1439 out:
1440         usb_put_dev(dev);
1441         pegasus_dec_workqueue();
1442         return res;
1443 }
1444
1445 static void pegasus_disconnect(struct usb_interface *intf)
1446 {
1447         struct pegasus *pegasus = usb_get_intfdata(intf);
1448
1449         usb_set_intfdata(intf, NULL);
1450         if (!pegasus) {
1451                 dev_dbg(&intf->dev, "unregistering non-bound device?\n");
1452                 return;
1453         }
1454
1455         pegasus->flags |= PEGASUS_UNPLUG;
1456         cancel_delayed_work(&pegasus->carrier_check);
1457         unregister_netdev(pegasus->net);
1458         usb_put_dev(interface_to_usbdev(intf));
1459         unlink_all_urbs(pegasus);
1460         free_all_urbs(pegasus);
1461         free_skb_pool(pegasus);
1462         if (pegasus->rx_skb != NULL) {
1463                 dev_kfree_skb(pegasus->rx_skb);
1464                 pegasus->rx_skb = NULL;
1465         }
1466         free_netdev(pegasus->net);
1467         pegasus_dec_workqueue();
1468 }
1469
1470 static int pegasus_suspend (struct usb_interface *intf, pm_message_t message)
1471 {
1472         struct pegasus *pegasus = usb_get_intfdata(intf);
1473         
1474         netif_device_detach (pegasus->net);
1475         cancel_delayed_work(&pegasus->carrier_check);
1476         if (netif_running(pegasus->net)) {
1477                 usb_kill_urb(pegasus->rx_urb);
1478                 usb_kill_urb(pegasus->intr_urb);
1479         }
1480         return 0;
1481 }
1482
1483 static int pegasus_resume (struct usb_interface *intf)
1484 {
1485         struct pegasus *pegasus = usb_get_intfdata(intf);
1486
1487         netif_device_attach (pegasus->net);
1488         if (netif_running(pegasus->net)) {
1489                 pegasus->rx_urb->status = 0;
1490                 pegasus->rx_urb->actual_length = 0;
1491                 read_bulk_callback(pegasus->rx_urb);
1492
1493                 pegasus->intr_urb->status = 0;
1494                 pegasus->intr_urb->actual_length = 0;
1495                 intr_callback(pegasus->intr_urb);
1496         }
1497         queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1498                                 CARRIER_CHECK_DELAY);
1499         return 0;
1500 }
1501
1502 static const struct net_device_ops pegasus_netdev_ops = {
1503         .ndo_open =                     pegasus_open,
1504         .ndo_stop =                     pegasus_close,
1505         .ndo_do_ioctl =                 pegasus_ioctl,
1506         .ndo_start_xmit =               pegasus_start_xmit,
1507         .ndo_set_multicast_list =       pegasus_set_multicast,
1508         .ndo_get_stats =                pegasus_netdev_stats,
1509         .ndo_tx_timeout =               pegasus_tx_timeout,
1510         .ndo_change_mtu =               eth_change_mtu,
1511         .ndo_set_mac_address =          eth_mac_addr,
1512         .ndo_validate_addr =            eth_validate_addr,
1513 };
1514
1515 static struct usb_driver pegasus_driver = {
1516         .name = driver_name,
1517         .probe = pegasus_probe,
1518         .disconnect = pegasus_disconnect,
1519         .id_table = pegasus_ids,
1520         .suspend = pegasus_suspend,
1521         .resume = pegasus_resume,
1522 };
1523
1524 static void __init parse_id(char *id)
1525 {
1526         unsigned int vendor_id=0, device_id=0, flags=0, i=0;
1527         char *token, *name=NULL;
1528
1529         if ((token = strsep(&id, ":")) != NULL)
1530                 name = token;
1531         /* name now points to a null terminated string*/
1532         if ((token = strsep(&id, ":")) != NULL)
1533                 vendor_id = simple_strtoul(token, NULL, 16);
1534         if ((token = strsep(&id, ":")) != NULL)
1535                 device_id = simple_strtoul(token, NULL, 16);
1536         flags = simple_strtoul(id, NULL, 16);
1537         pr_info("%s: new device %s, vendor ID 0x%04x, device ID 0x%04x, flags: 0x%x\n",
1538                 driver_name, name, vendor_id, device_id, flags);
1539
1540         if (vendor_id > 0x10000 || vendor_id == 0)
1541                 return;
1542         if (device_id > 0x10000 || device_id == 0)
1543                 return;
1544
1545         for (i=0; usb_dev_id[i].name; i++);
1546         usb_dev_id[i].name = name;
1547         usb_dev_id[i].vendor = vendor_id;
1548         usb_dev_id[i].device = device_id;
1549         usb_dev_id[i].private = flags;
1550         pegasus_ids[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
1551         pegasus_ids[i].idVendor = vendor_id;
1552         pegasus_ids[i].idProduct = device_id;
1553 }
1554
1555 static int __init pegasus_init(void)
1556 {
1557         pr_info("%s: %s, " DRIVER_DESC "\n", driver_name, DRIVER_VERSION);
1558         if (devid)
1559                 parse_id(devid);
1560         return usb_register(&pegasus_driver);
1561 }
1562
1563 static void __exit pegasus_exit(void)
1564 {
1565         usb_deregister(&pegasus_driver);
1566 }
1567
1568 module_init(pegasus_init);
1569 module_exit(pegasus_exit);