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net/mlx4_en: remove redundant code
[linux-2.6-block.git] / drivers / net / usb / pegasus.c
CommitLineData
1da177e4
LT		 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()
5a9dbfe0 24 * time as this seems to break dhcpd.
1da177e4
LT		 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
5a9dbfe0 28 * is out of the interrupt routine.
1da177e4
LT		 29 */
30
1da177e4
LT		 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 */
37cf3477 48#define DRIVER_VERSION "v0.6.14 (2006/09/27)"
1da177e4
LT		 49#define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>"
50#define DRIVER_DESC "Pegasus/Pegasus II USB Ethernet driver"
51
52static 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
eb939922
RR		 58static bool loopback;
59static bool mii_mode;
5a9dbfe0 60static char *devid;
1da177e4
LT		 61
62static struct usb_eth_dev usb_dev_id[] = {
63#define PEGASUS_DEV(pn, vid, pid, flags) \
64 {.name = pn, .vendor = vid, .device = pid, .private = flags},
ab854b24
CR		 65#define PEGASUS_DEV_CLASS(pn, vid, pid, dclass, flags) \
66 PEGASUS_DEV(pn, vid, pid, flags)
1da177e4
LT		 67#include "pegasus.h"
68#undef PEGASUS_DEV
ab854b24 69#undef PEGASUS_DEV_CLASS
a4f81a61 70 {NULL, 0, 0, 0},
1da177e4
LT		 71 {NULL, 0, 0, 0}
72};
73
74static 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},
ab854b24
CR		 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},
1da177e4
LT		 86#include "pegasus.h"
87#undef PEGASUS_DEV
ab854b24 88#undef PEGASUS_DEV_CLASS
a4f81a61 89 {},
1da177e4
LT		 90 {}
91};
92
93MODULE_AUTHOR(DRIVER_AUTHOR);
94MODULE_DESCRIPTION(DRIVER_DESC);
95MODULE_LICENSE("GPL");
96module_param(loopback, bool, 0);
97module_param(mii_mode, bool, 0);
a4f81a61 98module_param(devid, charp, 0);
1da177e4
LT		 99MODULE_PARM_DESC(loopback, "Enable MAC loopback mode (bit 0)");
100MODULE_PARM_DESC(mii_mode, "Enable HomePNA mode (bit 0),default=MII mode = 0");
a4f81a61 101MODULE_PARM_DESC(devid, "The format is: 'DEV_name:VendorID:DeviceID:Flags'");
1da177e4
LT		 102
103/* use ethtool to change the level for any given device */
104static int msg_level = -1;
5a9dbfe0
NK		 105module_param(msg_level, int, 0);
106MODULE_PARM_DESC(msg_level, "Override default message level");
1da177e4
LT		 107
108MODULE_DEVICE_TABLE(usb, pegasus_ids);
8cb89571 109static const struct net_device_ops pegasus_netdev_ops;
1da177e4
LT		 110
111static int update_eth_regs_async(pegasus_t *);
112/* Aargh!!! I _really_ hate such tweaks */
7d12e780 113static void ctrl_callback(struct urb *urb)
1da177e4
LT		 114{
115 pegasus_t *pegasus = urb->context;
c94cb314 116 int status = urb->status;
1da177e4
LT		 117
118 if (!pegasus)
119 return;
120
c94cb314 121 switch (status) {
1da177e4
LT		 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:
a475f603
JP		 135 if (net_ratelimit())
136 netif_dbg(pegasus, drv, pegasus->net,
137 "%s, status %d\n", __func__, status);
138 break;
1da177e4
LT		 139 }
140 pegasus->flags &= ~ETH_REGS_CHANGED;
141 wake_up(&pegasus->ctrl_wait);
142}
143
5a9dbfe0 144static int get_registers(pegasus_t *pegasus, __u16 indx, __u16 size,
1da177e4
LT		 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) {
a475f603
JP		 153 netif_warn(pegasus, drv, pegasus->net,
154 "out of memory in %s\n", __func__);
1da177e4
LT		 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);
da2bbdcc
HH		 167 pegasus->dr.wIndex = cpu_to_le16(indx);
168 pegasus->dr.wLength = cpu_to_le16(size);
1da177e4
LT		 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))) {
10c8211c 181 set_current_state(TASK_RUNNING);
955a2608
DB		 182 if (ret == -ENODEV)
183 netif_device_detach(pegasus->net);
a475f603
JP		 184 if (net_ratelimit())
185 netif_err(pegasus, drv, pegasus->net,
186 "%s, status %d\n", __func__, ret);
1da177e4
LT		 187 goto out;
188 }
189
190 schedule();
191out:
192 remove_wait_queue(&pegasus->ctrl_wait, &wait);
193 memcpy(data, buffer, size);
194 kfree(buffer);
195
196 return ret;
197}
198
5a9dbfe0 199static int set_registers(pegasus_t *pegasus, __u16 indx, __u16 size,
1da177e4
LT		 200 void *data)
201{
202 int ret;
203 char *buffer;
204 DECLARE_WAITQUEUE(wait, current);
205
175c0441 206 buffer = kmemdup(data, size, GFP_KERNEL);
1da177e4 207 if (!buffer) {
a475f603
JP		 208 netif_warn(pegasus, drv, pegasus->net,
209 "out of memory in %s\n", __func__);
1da177e4
LT		 210 return -ENOMEM;
211 }
1da177e4
LT		 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);
da2bbdcc
HH		 223 pegasus->dr.wIndex = cpu_to_le16(indx);
224 pegasus->dr.wLength = cpu_to_le16(size);
1da177e4
LT		 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))) {
955a2608
DB		 236 if (ret == -ENODEV)
237 netif_device_detach(pegasus->net);
a475f603
JP		 238 netif_err(pegasus, drv, pegasus->net,
239 "%s, status %d\n", __func__, ret);
1da177e4
LT		 240 goto out;
241 }
242
243 schedule();
244out:
245 remove_wait_queue(&pegasus->ctrl_wait, &wait);
246 kfree(buffer);
247
248 return ret;
249}
250
5a9dbfe0 251static int set_register(pegasus_t *pegasus, __u16 indx, __u8 data)
1da177e4
LT		 252{
253 int ret;
254 char *tmp;
255 DECLARE_WAITQUEUE(wait, current);
256
175c0441 257 tmp = kmemdup(&data, 1, GFP_KERNEL);
1da177e4 258 if (!tmp) {
a475f603
JP		 259 netif_warn(pegasus, drv, pegasus->net,
260 "out of memory in %s\n", __func__);
1da177e4
LT		 261 return -ENOMEM;
262 }
1da177e4
LT		 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);
da2bbdcc 273 pegasus->dr.wIndex = cpu_to_le16(indx);
1da177e4
LT		 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,
016534cf 280 tmp, 1, ctrl_callback, pegasus);
1da177e4
LT		 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))) {
955a2608
DB		 286 if (ret == -ENODEV)
287 netif_device_detach(pegasus->net);
a475f603
JP		 288 if (net_ratelimit())
289 netif_err(pegasus, drv, pegasus->net,
290 "%s, status %d\n", __func__, ret);
1da177e4
LT		 291 goto out;
292 }
293
294 schedule();
295out:
296 remove_wait_queue(&pegasus->ctrl_wait, &wait);
297 kfree(tmp);
298
299 return ret;
300}
301
5a9dbfe0 302static int update_eth_regs_async(pegasus_t *pegasus)
1da177e4
LT		 303{
304 int ret;
305
306 pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
307 pegasus->dr.bRequest = PEGASUS_REQ_SET_REGS;
e3453f63 308 pegasus->dr.wValue = cpu_to_le16(0);
1da177e4
LT		 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
955a2608
DB		 318 if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
319 if (ret == -ENODEV)
320 netif_device_detach(pegasus->net);
a475f603
JP		 321 netif_err(pegasus, drv, pegasus->net,
322 "%s, status %d\n", __func__, ret);
955a2608 323 }
1da177e4
LT		 324
325 return ret;
326}
327
c43c49bd 328/* Returns 0 on success, error on failure */
5a9dbfe0 329static int read_mii_word(pegasus_t *pegasus, __u8 phy, __u8 indx, __u16 *regd)
1da177e4
LT		 330{
331 int i;
332 __u8 data[4] = { phy, 0, 0, indx };
333 __le16 regdi;
334 int ret;
335
4a1728a2 336 set_register(pegasus, PhyCtrl, 0);
5a9dbfe0 337 set_registers(pegasus, PhyAddr, sizeof(data), data);
4a1728a2 338 set_register(pegasus, PhyCtrl, (indx | PHY_READ));
1da177e4
LT		 339 for (i = 0; i < REG_TIMEOUT; i++) {
340 ret = get_registers(pegasus, PhyCtrl, 1, data);
7e713b82
DB		 341 if (ret == -ESHUTDOWN)
342 goto fail;
1da177e4
LT		 343 if (data[0] & PHY_DONE)
344 break;
345 }
a475f603
JP		 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
7e713b82 354fail:
a475f603 355 netif_warn(pegasus, drv, pegasus->net, "%s failed\n", __func__);
1da177e4 356
4a1728a2 357 return ret;
1da177e4
LT		 358}
359
360static int mdio_read(struct net_device *dev, int phy_id, int loc)
361{
8739cfef 362 pegasus_t *pegasus = netdev_priv(dev);
1da177e4
LT		 363 u16 res;
364
365 read_mii_word(pegasus, phy_id, loc, &res);
366 return (int)res;
367}
368
5a9dbfe0 369static int write_mii_word(pegasus_t *pegasus, __u8 phy, __u8 indx, __u16 regd)
1da177e4
LT		 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);
4a1728a2
PM		 377 set_register(pegasus, PhyCtrl, 0);
378 set_registers(pegasus, PhyAddr, sizeof(data), data);
379 set_register(pegasus, PhyCtrl, (indx | PHY_WRITE));
1da177e4
LT		 380 for (i = 0; i < REG_TIMEOUT; i++) {
381 ret = get_registers(pegasus, PhyCtrl, 1, data);
7e713b82
DB		 382 if (ret == -ESHUTDOWN)
383 goto fail;
1da177e4
LT		 384 if (data[0] & PHY_DONE)
385 break;
386 }
a475f603
JP		 387
388 if (i >= REG_TIMEOUT)
389 goto fail;
390
391 return ret;
1da177e4 392
7e713b82 393fail:
a475f603 394 netif_warn(pegasus, drv, pegasus->net, "%s failed\n", __func__);
4a1728a2 395 return -ETIMEDOUT;
1da177e4
LT		 396}
397
398static void mdio_write(struct net_device *dev, int phy_id, int loc, int val)
399{
8739cfef 400 pegasus_t *pegasus = netdev_priv(dev);
1da177e4
LT		 401
402 write_mii_word(pegasus, phy_id, loc, val);
403}
404
5a9dbfe0 405static int read_eprom_word(pegasus_t *pegasus, __u8 index, __u16 *retdata)
1da177e4
LT		 406{
407 int i;
408 __u8 tmp;
409 __le16 retdatai;
410 int ret;
411
4a1728a2
PM		 412 set_register(pegasus, EpromCtrl, 0);
413 set_register(pegasus, EpromOffset, index);
414 set_register(pegasus, EpromCtrl, EPROM_READ);
1da177e4
LT		 415
416 for (i = 0; i < REG_TIMEOUT; i++) {
417 ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
418 if (tmp & EPROM_DONE)
419 break;
7e713b82
DB		 420 if (ret == -ESHUTDOWN)
421 goto fail;
1da177e4 422 }
a475f603
JP		 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;
1da177e4 429
7e713b82 430fail:
a475f603 431 netif_warn(pegasus, drv, pegasus->net, "%s failed\n", __func__);
4a1728a2 432 return -ETIMEDOUT;
1da177e4
LT		 433}
434
435#ifdef PEGASUS_WRITE_EEPROM
5a9dbfe0 436static inline void enable_eprom_write(pegasus_t *pegasus)
1da177e4
LT		 437{
438 __u8 tmp;
439 int ret;
440
4a1728a2
PM		 441 get_registers(pegasus, EthCtrl2, 1, &tmp);
442 set_register(pegasus, EthCtrl2, tmp | EPROM_WR_ENABLE);
1da177e4
LT		 443}
444
5a9dbfe0 445static inline void disable_eprom_write(pegasus_t *pegasus)
1da177e4
LT		 446{
447 __u8 tmp;
448 int ret;
449
4a1728a2
PM		 450 get_registers(pegasus, EthCtrl2, 1, &tmp);
451 set_register(pegasus, EpromCtrl, 0);
452 set_register(pegasus, EthCtrl2, tmp & ~EPROM_WR_ENABLE);
1da177e4
LT		 453}
454
5a9dbfe0 455static int write_eprom_word(pegasus_t *pegasus, __u8 index, __u16 data)
1da177e4
LT		 456{
457 int i;
458 __u8 tmp, d[4] = { 0x3f, 0, 0, EPROM_WRITE };
459 int ret;
e3453f63 460 __le16 le_data = cpu_to_le16(data);
1da177e4 461
4a1728a2 462 set_registers(pegasus, EpromOffset, 4, d);
1da177e4 463 enable_eprom_write(pegasus);
4a1728a2 464 set_register(pegasus, EpromOffset, index);
e3453f63 465 set_registers(pegasus, EpromData, 2, &le_data);
4a1728a2 466 set_register(pegasus, EpromCtrl, EPROM_WRITE);
1da177e4
LT		 467
468 for (i = 0; i < REG_TIMEOUT; i++) {
469 ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
7e713b82
DB		 470 if (ret == -ESHUTDOWN)
471 goto fail;
1da177e4
LT		 472 if (tmp & EPROM_DONE)
473 break;
474 }
475 disable_eprom_write(pegasus);
a475f603
JP		 476 if (i >= REG_TIMEOUT)
477 goto fail;
478
479 return ret;
480
7e713b82 481fail:
a475f603 482 netif_warn(pegasus, drv, pegasus->net, "%s failed\n", __func__);
4a1728a2 483 return -ETIMEDOUT;
1da177e4
LT		 484}
485#endif /* PEGASUS_WRITE_EEPROM */
486
5a9dbfe0 487static inline void get_node_id(pegasus_t *pegasus, __u8 *id)
1da177e4
LT		 488{
489 int i;
490 __u16 w16;
491
492 for (i = 0; i < 3; i++) {
493 read_eprom_word(pegasus, i, &w16);
da2bbdcc 494 ((__le16 *) id)[i] = cpu_to_le16(w16);
1da177e4
LT		 495 }
496}
497
5a9dbfe0 498static void set_ethernet_addr(pegasus_t *pegasus)
1da177e4
LT		 499{
500 __u8 node_id[6];
1da177e4 501
37cf3477
PM		 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);
5a9dbfe0 506 set_registers(pegasus, EthID, sizeof(node_id), node_id);
37cf3477 507 }
5a9dbfe0 508 memcpy(pegasus->net->dev_addr, node_id, sizeof(node_id));
1da177e4
LT		 509}
510
5a9dbfe0 511static inline int reset_mac(pegasus_t *pegasus)
1da177e4
LT		 512{
513 __u8 data = 0x8;
514 int i;
1da177e4 515
4a1728a2 516 set_register(pegasus, EthCtrl1, data);
1da177e4 517 for (i = 0; i < REG_TIMEOUT; i++) {
4a1728a2 518 get_registers(pegasus, EthCtrl1, 1, &data);
1da177e4 519 if (~data & 0x08) {
681f1623 520 if (loopback)
1da177e4
LT		 521 break;
522 if (mii_mode && (pegasus->features & HAS_HOME_PNA))
4a1728a2 523 set_register(pegasus, Gpio1, 0x34);
1da177e4 524 else
4a1728a2
PM		 525 set_register(pegasus, Gpio1, 0x26);
526 set_register(pegasus, Gpio0, pegasus->features);
527 set_register(pegasus, Gpio0, DEFAULT_GPIO_SET);
1da177e4
LT		 528 break;
529 }
530 }
531 if (i == REG_TIMEOUT)
4a1728a2 532 return -ETIMEDOUT;
1da177e4
LT		 533
534 if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
535 usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
4a1728a2
PM		 536 set_register(pegasus, Gpio0, 0x24);
537 set_register(pegasus, Gpio0, 0x26);
1da177e4
LT		 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
548static 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;
681f1623 564 data[2] = loopback ? 0x09 : 0x01;
1da177e4 565
5a9dbfe0 566 memcpy(pegasus->eth_regs, data, sizeof(data));
1da177e4
LT		 567 ret = set_registers(pegasus, EthCtrl0, 3, data);
568
569 if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
efafe6fb 570 usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS2 ||
1da177e4
LT		 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
4a1728a2 577 return ret;
1da177e4
LT		 578}
579
5a9dbfe0 580static void fill_skb_pool(pegasus_t *pegasus)
1da177e4
LT		 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;
1da177e4
LT		 594 skb_reserve(pegasus->rx_pool[i], 2);
595 }
596}
597
5a9dbfe0 598static void free_skb_pool(pegasus_t *pegasus)
1da177e4
LT		 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
610static 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
7d12e780 625static void read_bulk_callback(struct urb *urb)
1da177e4
LT		 626{
627 pegasus_t *pegasus = urb->context;
628 struct net_device *net;
629 int rx_status, count = urb->actual_length;
c94cb314 630 int status = urb->status;
1da177e4
LT		 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
c94cb314 641 switch (status) {
1da177e4
LT		 642 case 0:
643 break;
38e2bfc9 644 case -ETIME:
a475f603 645 netif_dbg(pegasus, rx_err, net, "reset MAC\n");
1da177e4
LT		 646 pegasus->flags &= ~PEGASUS_RX_BUSY;
647 break;
648 case -EPIPE: /* stall, or disconnect from TT */
649 /* FIXME schedule work to clear the halt */
a475f603 650 netif_warn(pegasus, rx_err, net, "no rx stall recovery\n");
1da177e4
LT		 651 return;
652 case -ENOENT:
653 case -ECONNRESET:
654 case -ESHUTDOWN:
a475f603 655 netif_dbg(pegasus, ifdown, net, "rx unlink, %d\n", status);
1da177e4
LT		 656 return;
657 default:
a475f603 658 netif_dbg(pegasus, rx_err, net, "RX status %d\n", status);
1da177e4
LT		 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) {
a475f603
JP		 667 netif_dbg(pegasus, rx_err, net,
668 "RX packet error %x\n", rx_status);
1da177e4 669 pegasus->stats.rx_errors++;
5a9dbfe0 670 if (rx_status & 0x06) /* long or runt */
1da177e4
LT		 671 pegasus->stats.rx_length_errors++;
672 if (rx_status & 0x08)
673 pegasus->stats.rx_crc_errors++;
5a9dbfe0 674 if (rx_status & 0x10) /* extra bits */
1da177e4
LT		 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
a85a46f2
KV		 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
1da177e4
LT		 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;
715goon:
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);
955a2608
DB		 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) {
1da177e4
LT		 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
732tl_sched:
733 tasklet_schedule(&pegasus->rx_tl);
734}
735
736static void rx_fixup(unsigned long data)
737{
738 pegasus_t *pegasus;
739 unsigned long flags;
955a2608 740 int status;
1da177e4
LT		 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;
5a9dbfe0 751 if (pegasus->rx_skb == NULL)
1da177e4 752 pegasus->rx_skb = pull_skb(pegasus);
1da177e4 753 if (pegasus->rx_skb == NULL) {
a475f603 754 netif_warn(pegasus, rx_err, pegasus->net, "low on memory\n");
1da177e4
LT		 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);
762try_again:
955a2608
DB		 763 status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);
764 if (status == -ENODEV)
765 netif_device_detach(pegasus->net);
766 else if (status) {
1da177e4
LT		 767 pegasus->flags |= PEGASUS_RX_URB_FAIL;
768 tasklet_schedule(&pegasus->rx_tl);
769 } else {
770 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
771 }
772done:
773 spin_unlock_irqrestore(&pegasus->rx_pool_lock, flags);
774}
775
7d12e780 776static void write_bulk_callback(struct urb *urb)
1da177e4
LT		 777{
778 pegasus_t *pegasus = urb->context;
9351982b 779 struct net_device *net;
c94cb314 780 int status = urb->status;
1da177e4
LT		 781
782 if (!pegasus)
783 return;
784
9351982b
MG		 785 net = pegasus->net;
786
1da177e4
LT		 787 if (!netif_device_present(net) || !netif_running(net))
788 return;
789
c94cb314 790 switch (status) {
1da177e4
LT		 791 case -EPIPE:
792 /* FIXME schedule_work() to clear the tx halt */
793 netif_stop_queue(net);
a475f603 794 netif_warn(pegasus, tx_err, net, "no tx stall recovery\n");
1da177e4
LT		 795 return;
796 case -ENOENT:
797 case -ECONNRESET:
798 case -ESHUTDOWN:
a475f603 799 netif_dbg(pegasus, ifdown, net, "tx unlink, %d\n", status);
1da177e4
LT		 800 return;
801 default:
a475f603 802 netif_info(pegasus, tx_err, net, "TX status %d\n", status);
1da177e4
LT		 803 /* FALL THROUGH */
804 case 0:
805 break;
806 }
807
1ae5dc34 808 net->trans_start = jiffies; /* prevent tx timeout */
1da177e4
LT		 809 netif_wake_queue(net);
810}
811
7d12e780 812static void intr_callback(struct urb *urb)
1da177e4
LT		 813{
814 pegasus_t *pegasus = urb->context;
815 struct net_device *net;
c94cb314 816 int res, status = urb->status;
1da177e4
LT		 817
818 if (!pegasus)
819 return;
820 net = pegasus->net;
821
c94cb314 822 switch (status) {
1da177e4
LT		 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 */
a475f603 833 netif_dbg(pegasus, timer, net, "intr status %d\n", status);
1da177e4
LT		 834 }
835
836 if (urb->actual_length >= 6) {
5a9dbfe0 837 u8 *d = urb->transfer_buffer;
1da177e4
LT		 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 */
1da177e4
LT		 855
856 /* bytes 3-4 == rx_lostpkt, reg 2E/2F */
857 pegasus->stats.rx_missed_errors += ((d[3] & 0x7f) << 8) | d[4];
858 }
859
c94cb314
ON		 860 res = usb_submit_urb(urb, GFP_ATOMIC);
861 if (res == -ENODEV)
955a2608 862 netif_device_detach(pegasus->net);
a475f603
JP		 863 if (res)
864 netif_err(pegasus, timer, net,
865 "can't resubmit interrupt urb, %d\n", res);
1da177e4
LT		 866}
867
868static void pegasus_tx_timeout(struct net_device *net)
869{
870 pegasus_t *pegasus = netdev_priv(net);
a475f603 871 netif_warn(pegasus, timer, net, "tx timeout\n");
1da177e4
LT		 872 usb_unlink_urb(pegasus->tx_urb);
873 pegasus->stats.tx_errors++;
874}
875
25a79c41
SH		 876static netdev_tx_t pegasus_start_xmit(struct sk_buff *skb,
877 struct net_device *net)
1da177e4
LT		 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);
d626f62b 887 skb_copy_from_linear_data(skb, pegasus->tx_buff + 2, skb->len);
1da177e4
LT		 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))) {
a475f603 893 netif_warn(pegasus, tx_err, net, "fail tx, %d\n", res);
1da177e4
LT		 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 */
9dd014eb 899 case -EPERM:
955a2608 900 netif_device_detach(pegasus->net);
1da177e4
LT		 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;
1da177e4
LT		 909 }
910 dev_kfree_skb(skb);
911
6ed10654 912 return NETDEV_TX_OK;
1da177e4
LT		 913}
914
915static struct net_device_stats *pegasus_netdev_stats(struct net_device *dev)
916{
917 return &((pegasus_t *) netdev_priv(dev))->stats;
918}
919
5a9dbfe0 920static inline void disable_net_traffic(pegasus_t *pegasus)
1da177e4 921{
e3453f63 922 __le16 tmp = cpu_to_le16(0);
1da177e4 923
e3453f63 924 set_registers(pegasus, EthCtrl0, sizeof(tmp), &tmp);
1da177e4
LT		 925}
926
5a9dbfe0 927static inline void get_interrupt_interval(pegasus_t *pegasus)
1da177e4 928{
e3453f63
MB		 929 u16 data;
930 u8 interval;
1da177e4 931
e3453f63
MB		 932 read_eprom_word(pegasus, 4, &data);
933 interval = data >> 8;
a85a46f2 934 if (pegasus->usb->speed != USB_SPEED_HIGH) {
e3453f63 935 if (interval < 0x80) {
a475f603
JP		 936 netif_info(pegasus, timer, pegasus->net,
937 "intr interval changed from %ums to %ums\n",
938 interval, 0x80);
e3453f63
MB		 939 interval = 0x80;
940 data = (data & 0x00FF) | ((u16)interval << 8);
a85a46f2 941#ifdef PEGASUS_WRITE_EEPROM
e3453f63 942 write_eprom_word(pegasus, 4, data);
1da177e4 943#endif
a85a46f2 944 }
1da177e4 945 }
e3453f63 946 pegasus->intr_interval = interval;
1da177e4
LT		 947}
948
949static void set_carrier(struct net_device *net)
950{
951 pegasus_t *pegasus = netdev_priv(net);
952 u16 tmp;
953
c43c49bd 954 if (read_mii_word(pegasus, pegasus->phy, MII_BMSR, &tmp))
1da177e4 955 return;
a85a46f2 956
1da177e4
LT		 957 if (tmp & BMSR_LSTATUS)
958 netif_carrier_on(net);
959 else
960 netif_carrier_off(net);
961}
962
5a9dbfe0 963static void free_all_urbs(pegasus_t *pegasus)
1da177e4
LT		 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
5a9dbfe0 971static void unlink_all_urbs(pegasus_t *pegasus)
1da177e4
LT		 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
5a9dbfe0 979static int alloc_urbs(pegasus_t *pegasus)
1da177e4
LT		 980{
981 pegasus->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
5a9dbfe0 982 if (!pegasus->ctrl_urb)
1da177e4 983 return 0;
1da177e4
LT		 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
1006static 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);
5a9dbfe0 1020
1da177e4
LT		 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))) {
955a2608
DB		 1026 if (res == -ENODEV)
1027 netif_device_detach(pegasus->net);
a475f603 1028 netif_dbg(pegasus, ifup, net, "failed rx_urb, %d\n", res);
1da177e4
LT		 1029 goto exit;
1030 }
1031
1032 usb_fill_int_urb(pegasus->intr_urb, pegasus->usb,
1033 usb_rcvintpipe(pegasus->usb, 3),
5a9dbfe0 1034 pegasus->intr_buff, sizeof(pegasus->intr_buff),
1da177e4
LT		 1035 intr_callback, pegasus, pegasus->intr_interval);
1036 if ((res = usb_submit_urb(pegasus->intr_urb, GFP_KERNEL))) {
955a2608
DB		 1037 if (res == -ENODEV)
1038 netif_device_detach(pegasus->net);
a475f603 1039 netif_dbg(pegasus, ifup, net, "failed intr_urb, %d\n", res);
1da177e4
LT		 1040 usb_kill_urb(pegasus->rx_urb);
1041 goto exit;
1042 }
1043 if ((res = enable_net_traffic(net, pegasus->usb))) {
a475f603
JP		 1044 netif_dbg(pegasus, ifup, net,
1045 "can't enable_net_traffic() - %d\n", res);
1da177e4
LT		 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);
a475f603 1054 netif_dbg(pegasus, ifup, net, "open\n");
1da177e4
LT		 1055 res = 0;
1056exit:
1057 return res;
1058}
1059
1060static 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
1073static void pegasus_get_drvinfo(struct net_device *dev,
1074 struct ethtool_drvinfo *info)
1075{
1076 pegasus_t *pegasus = netdev_priv(dev);
7826d43f
JP		 1077
1078 strlcpy(info->driver, driver_name, sizeof(info->driver));
1079 strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
5a9dbfe0 1080 usb_make_path(pegasus->usb, info->bus_info, sizeof(info->bus_info));
1da177e4
LT		 1081}
1082
1083/* also handles three patterns of some kind in hardware */
1084#define WOL_SUPPORTED (WAKE_MAGIC|WAKE_PHY)
1085
1086static void
1087pegasus_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1088{
1089 pegasus_t *pegasus = netdev_priv(dev);
1090
1091 wol->supported = WAKE_MAGIC | WAKE_PHY;
1092 wol->wolopts = pegasus->wolopts;
1093}
1094
1095static int
1096pegasus_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1097{
1098 pegasus_t *pegasus = netdev_priv(dev);
1099 u8 reg78 = 0x04;
5a9dbfe0 1100
1da177e4
LT		 1101 if (wol->wolopts & ~WOL_SUPPORTED)
1102 return -EINVAL;
1103
1104 if (wol->wolopts & WAKE_MAGIC)
1105 reg78 |= 0x80;
1106 if (wol->wolopts & WAKE_PHY)
1107 reg78 |= 0x40;
1108 /* FIXME this 0x10 bit still needs to get set in the chip... */
1109 if (wol->wolopts)
1110 pegasus->eth_regs[0] |= 0x10;
1111 else
1112 pegasus->eth_regs[0] &= ~0x10;
1113 pegasus->wolopts = wol->wolopts;
1114 return set_register(pegasus, WakeupControl, reg78);
1115}
1116
1117static inline void pegasus_reset_wol(struct net_device *dev)
1118{
1119 struct ethtool_wolinfo wol;
5a9dbfe0 1120
1da177e4
LT		 1121 memset(&wol, 0, sizeof wol);
1122 (void) pegasus_set_wol(dev, &wol);
1123}
1124
1125static int
1126pegasus_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1127{
1128 pegasus_t *pegasus;
1129
1da177e4
LT		 1130 pegasus = netdev_priv(dev);
1131 mii_ethtool_gset(&pegasus->mii, ecmd);
1da177e4
LT		 1132 return 0;
1133}
1134
1135static int
1136pegasus_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1137{
1138 pegasus_t *pegasus = netdev_priv(dev);
1139 return mii_ethtool_sset(&pegasus->mii, ecmd);
1140}
1141
1142static int pegasus_nway_reset(struct net_device *dev)
1143{
1144 pegasus_t *pegasus = netdev_priv(dev);
1145 return mii_nway_restart(&pegasus->mii);
1146}
1147
1148static u32 pegasus_get_link(struct net_device *dev)
1149{
1150 pegasus_t *pegasus = netdev_priv(dev);
1151 return mii_link_ok(&pegasus->mii);
1152}
1153
1154static u32 pegasus_get_msglevel(struct net_device *dev)
1155{
1156 pegasus_t *pegasus = netdev_priv(dev);
1157 return pegasus->msg_enable;
1158}
1159
1160static void pegasus_set_msglevel(struct net_device *dev, u32 v)
1161{
1162 pegasus_t *pegasus = netdev_priv(dev);
1163 pegasus->msg_enable = v;
1164}
1165
0fc0b732 1166static const struct ethtool_ops ops = {
1da177e4
LT		 1167 .get_drvinfo = pegasus_get_drvinfo,
1168 .get_settings = pegasus_get_settings,
1169 .set_settings = pegasus_set_settings,
1170 .nway_reset = pegasus_nway_reset,
1171 .get_link = pegasus_get_link,
1172 .get_msglevel = pegasus_get_msglevel,
1173 .set_msglevel = pegasus_set_msglevel,
1174 .get_wol = pegasus_get_wol,
1175 .set_wol = pegasus_set_wol,
1176};
1177
1178static int pegasus_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
1179{
5a9dbfe0 1180 __u16 *data = (__u16 *) &rq->ifr_ifru;
1da177e4
LT		 1181 pegasus_t *pegasus = netdev_priv(net);
1182 int res;
1183
1184 switch (cmd) {
1185 case SIOCDEVPRIVATE:
1186 data[0] = pegasus->phy;
1187 case SIOCDEVPRIVATE + 1:
1188 read_mii_word(pegasus, data[0], data[1] & 0x1f, &data[3]);
1189 res = 0;
1190 break;
1191 case SIOCDEVPRIVATE + 2:
1192 if (!capable(CAP_NET_ADMIN))
1193 return -EPERM;
1194 write_mii_word(pegasus, pegasus->phy, data[1] & 0x1f, data[2]);
1195 res = 0;
1196 break;
1197 default:
1198 res = -EOPNOTSUPP;
1199 }
1200 return res;
1201}
1202
1203static void pegasus_set_multicast(struct net_device *net)
1204{
1205 pegasus_t *pegasus = netdev_priv(net);
1206
1207 if (net->flags & IFF_PROMISC) {
1208 pegasus->eth_regs[EthCtrl2] |= RX_PROMISCUOUS;
a475f603 1209 netif_info(pegasus, link, net, "Promiscuous mode enabled\n");
4cd24eaf 1210 } else if (!netdev_mc_empty(net) || (net->flags & IFF_ALLMULTI)) {
1da177e4
LT		 1211 pegasus->eth_regs[EthCtrl0] |= RX_MULTICAST;
1212 pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
a475f603 1213 netif_dbg(pegasus, link, net, "set allmulti\n");
1da177e4
LT		 1214 } else {
1215 pegasus->eth_regs[EthCtrl0] &= ~RX_MULTICAST;
1216 pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1217 }
1218
e000ea13
DB		 1219 pegasus->ctrl_urb->status = 0;
1220
1da177e4 1221 pegasus->flags |= ETH_REGS_CHANGE;
7d12e780 1222 ctrl_callback(pegasus->ctrl_urb);
1da177e4
LT		 1223}
1224
5a9dbfe0 1225static __u8 mii_phy_probe(pegasus_t *pegasus)
1da177e4
LT		 1226{
1227 int i;
1228 __u16 tmp;
1229
1230 for (i = 0; i < 32; i++) {
1231 read_mii_word(pegasus, i, MII_BMSR, &tmp);
1232 if (tmp == 0 || tmp == 0xffff || (tmp & BMSR_MEDIA) == 0)
1233 continue;
1234 else
1235 return i;
1236 }
1237
1238 return 0xff;
1239}
1240
5a9dbfe0 1241static inline void setup_pegasus_II(pegasus_t *pegasus)
1da177e4
LT		 1242{
1243 __u8 data = 0xa5;
5a9dbfe0 1244
4a1728a2
PM		 1245 set_register(pegasus, Reg1d, 0);
1246 set_register(pegasus, Reg7b, 1);
1da177e4
LT		 1247 mdelay(100);
1248 if ((pegasus->features & HAS_HOME_PNA) && mii_mode)
4a1728a2 1249 set_register(pegasus, Reg7b, 0);
1da177e4 1250 else
4a1728a2 1251 set_register(pegasus, Reg7b, 2);
1da177e4 1252
4a1728a2
PM		 1253 set_register(pegasus, 0x83, data);
1254 get_registers(pegasus, 0x83, 1, &data);
1da177e4 1255
5a9dbfe0 1256 if (data == 0xa5)
1da177e4 1257 pegasus->chip = 0x8513;
5a9dbfe0 1258 else
1da177e4 1259 pegasus->chip = 0;
1da177e4 1260
4a1728a2
PM		 1261 set_register(pegasus, 0x80, 0xc0);
1262 set_register(pegasus, 0x83, 0xff);
1263 set_register(pegasus, 0x84, 0x01);
5a9dbfe0 1264
1da177e4 1265 if (pegasus->features & HAS_HOME_PNA && mii_mode)
4a1728a2 1266 set_register(pegasus, Reg81, 6);
1da177e4 1267 else
4a1728a2 1268 set_register(pegasus, Reg81, 2);
1da177e4
LT		 1269}
1270
1271
cda2836d 1272static int pegasus_count;
5a9dbfe0 1273static struct workqueue_struct *pegasus_workqueue;
1da177e4
LT		 1274#define CARRIER_CHECK_DELAY (2 * HZ)
1275
c4028958 1276static void check_carrier(struct work_struct *work)
1da177e4 1277{
c4028958 1278 pegasus_t *pegasus = container_of(work, pegasus_t, carrier_check.work);
1da177e4
LT		 1279 set_carrier(pegasus->net);
1280 if (!(pegasus->flags & PEGASUS_UNPLUG)) {
1281 queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1282 CARRIER_CHECK_DELAY);
1283 }
1284}
1285
4f63135e
BC		 1286static int pegasus_blacklisted(struct usb_device *udev)
1287{
1288 struct usb_device_descriptor *udd = &udev->descriptor;
1289
1290 /* Special quirk to keep the driver from handling the Belkin Bluetooth
1291 * dongle which happens to have the same ID.
1292 */
e3453f63
MB		 1293 if ((udd->idVendor == cpu_to_le16(VENDOR_BELKIN)) &&
1294 (udd->idProduct == cpu_to_le16(0x0121)) &&
4f63135e
BC		 1295 (udd->bDeviceClass == USB_CLASS_WIRELESS_CONTROLLER) &&
1296 (udd->bDeviceProtocol == 1))
1297 return 1;
1298
1299 return 0;
1300}
1301
cda2836d
DB		 1302/* we rely on probe() and remove() being serialized so we
1303 * don't need extra locking on pegasus_count.
1304 */
1305static void pegasus_dec_workqueue(void)
1306{
1307 pegasus_count--;
1308 if (pegasus_count == 0) {
1309 destroy_workqueue(pegasus_workqueue);
1310 pegasus_workqueue = NULL;
1311 }
1312}
1313
1da177e4
LT		 1314static int pegasus_probe(struct usb_interface *intf,
1315 const struct usb_device_id *id)
1316{
1317 struct usb_device *dev = interface_to_usbdev(intf);
1318 struct net_device *net;
1319 pegasus_t *pegasus;
1320 int dev_index = id - pegasus_ids;
1321 int res = -ENOMEM;
1322
cda2836d
DB		 1323 if (pegasus_blacklisted(dev))
1324 return -ENODEV;
4f63135e 1325
cda2836d
DB		 1326 if (pegasus_count == 0) {
1327 pegasus_workqueue = create_singlethread_workqueue("pegasus");
1328 if (!pegasus_workqueue)
1329 return -ENOMEM;
4f63135e 1330 }
cda2836d
DB		 1331 pegasus_count++;
1332
1da177e4 1333 net = alloc_etherdev(sizeof(struct pegasus));
41de8d4c 1334 if (!net)
1da177e4 1335 goto out;
1da177e4
LT		 1336
1337 pegasus = netdev_priv(net);
1da177e4
LT		 1338 pegasus->dev_index = dev_index;
1339 init_waitqueue_head(&pegasus->ctrl_wait);
1340
1341 if (!alloc_urbs(pegasus)) {
1342 dev_err(&intf->dev, "can't allocate %s\n", "urbs");
1343 goto out1;
1344 }
1345
1346 tasklet_init(&pegasus->rx_tl, rx_fixup, (unsigned long) pegasus);
1347
c4028958 1348 INIT_DELAYED_WORK(&pegasus->carrier_check, check_carrier);
1da177e4
LT		 1349
1350 pegasus->intf = intf;
1351 pegasus->usb = dev;
1352 pegasus->net = net;
8cb89571
ON		 1353
1354
1da177e4 1355 net->watchdog_timeo = PEGASUS_TX_TIMEOUT;
8cb89571 1356 net->netdev_ops = &pegasus_netdev_ops;
1da177e4
LT		 1357 SET_ETHTOOL_OPS(net, &ops);
1358 pegasus->mii.dev = net;
1359 pegasus->mii.mdio_read = mdio_read;
1360 pegasus->mii.mdio_write = mdio_write;
1361 pegasus->mii.phy_id_mask = 0x1f;
1362 pegasus->mii.reg_num_mask = 0x1f;
1363 spin_lock_init(&pegasus->rx_pool_lock);
5a9dbfe0 1364 pegasus->msg_enable = netif_msg_init(msg_level, NETIF_MSG_DRV
1da177e4
LT		 1365 | NETIF_MSG_PROBE | NETIF_MSG_LINK);
1366
1367 pegasus->features = usb_dev_id[dev_index].private;
1368 get_interrupt_interval(pegasus);
1369 if (reset_mac(pegasus)) {
1370 dev_err(&intf->dev, "can't reset MAC\n");
1371 res = -EIO;
1372 goto out2;
1373 }
1374 set_ethernet_addr(pegasus);
1375 fill_skb_pool(pegasus);
1376 if (pegasus->features & PEGASUS_II) {
1377 dev_info(&intf->dev, "setup Pegasus II specific registers\n");
1378 setup_pegasus_II(pegasus);
1379 }
1380 pegasus->phy = mii_phy_probe(pegasus);
1381 if (pegasus->phy == 0xff) {
1382 dev_warn(&intf->dev, "can't locate MII phy, using default\n");
1383 pegasus->phy = 1;
1384 }
1385 pegasus->mii.phy_id = pegasus->phy;
1386 usb_set_intfdata(intf, pegasus);
1387 SET_NETDEV_DEV(net, &intf->dev);
1388 pegasus_reset_wol(net);
1389 res = register_netdev(net);
1390 if (res)
1391 goto out3;
1392 queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1393 CARRIER_CHECK_DELAY);
1394
e174961c 1395 dev_info(&intf->dev, "%s, %s, %pM\n",
0795af57
JP		 1396 net->name,
1397 usb_dev_id[dev_index].name,
e174961c 1398 net->dev_addr);
1da177e4
LT		 1399 return 0;
1400
1401out3:
1402 usb_set_intfdata(intf, NULL);
1403 free_skb_pool(pegasus);
1404out2:
1405 free_all_urbs(pegasus);
1406out1:
1407 free_netdev(net);
1408out:
cda2836d 1409 pegasus_dec_workqueue();
1da177e4
LT		 1410 return res;
1411}
1412
1413static void pegasus_disconnect(struct usb_interface *intf)
1414{
1415 struct pegasus *pegasus = usb_get_intfdata(intf);
1416
1417 usb_set_intfdata(intf, NULL);
1418 if (!pegasus) {
1419 dev_dbg(&intf->dev, "unregistering non-bound device?\n");
1420 return;
1421 }
1422
1423 pegasus->flags |= PEGASUS_UNPLUG;
1424 cancel_delayed_work(&pegasus->carrier_check);
1425 unregister_netdev(pegasus->net);
a85a46f2 1426 unlink_all_urbs(pegasus);
1da177e4
LT		 1427 free_all_urbs(pegasus);
1428 free_skb_pool(pegasus);
4c13eb66 1429 if (pegasus->rx_skb != NULL) {
1da177e4 1430 dev_kfree_skb(pegasus->rx_skb);
4c13eb66
ACM		 1431 pegasus->rx_skb = NULL;
1432 }
1da177e4 1433 free_netdev(pegasus->net);
cda2836d 1434 pegasus_dec_workqueue();
1da177e4
LT		 1435}
1436
5a9dbfe0 1437static int pegasus_suspend(struct usb_interface *intf, pm_message_t message)
1da177e4
LT		 1438{
1439 struct pegasus *pegasus = usb_get_intfdata(intf);
5a9dbfe0
NK		 1440
1441 netif_device_detach(pegasus->net);
7e713b82 1442 cancel_delayed_work(&pegasus->carrier_check);
27d72e85 1443 if (netif_running(pegasus->net)) {
27d72e85
DB		 1444 usb_kill_urb(pegasus->rx_urb);
1445 usb_kill_urb(pegasus->intr_urb);
1446 }
1da177e4
LT		 1447 return 0;
1448}
1449
5a9dbfe0 1450static int pegasus_resume(struct usb_interface *intf)
1da177e4
LT		 1451{
1452 struct pegasus *pegasus = usb_get_intfdata(intf);
1453
5a9dbfe0 1454 netif_device_attach(pegasus->net);
27d72e85
DB		 1455 if (netif_running(pegasus->net)) {
1456 pegasus->rx_urb->status = 0;
1457 pegasus->rx_urb->actual_length = 0;
7d12e780 1458 read_bulk_callback(pegasus->rx_urb);
27d72e85
DB		 1459
1460 pegasus->intr_urb->status = 0;
1461 pegasus->intr_urb->actual_length = 0;
7d12e780 1462 intr_callback(pegasus->intr_urb);
27d72e85 1463 }
7e713b82
DB		 1464 queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1465 CARRIER_CHECK_DELAY);
1da177e4
LT		 1466 return 0;
1467}
1468
8cb89571
ON		 1469static const struct net_device_ops pegasus_netdev_ops = {
1470 .ndo_open = pegasus_open,
1471 .ndo_stop = pegasus_close,
1472 .ndo_do_ioctl = pegasus_ioctl,
1473 .ndo_start_xmit = pegasus_start_xmit,
afc4b13d 1474 .ndo_set_rx_mode = pegasus_set_multicast,
8cb89571
ON		 1475 .ndo_get_stats = pegasus_netdev_stats,
1476 .ndo_tx_timeout = pegasus_tx_timeout,
635ecaa7 1477 .ndo_change_mtu = eth_change_mtu,
240c102d
BH		 1478 .ndo_set_mac_address = eth_mac_addr,
1479 .ndo_validate_addr = eth_validate_addr,
8cb89571
ON		 1480};
1481
1da177e4
LT		 1482static struct usb_driver pegasus_driver = {
1483 .name = driver_name,
1484 .probe = pegasus_probe,
1485 .disconnect = pegasus_disconnect,
1486 .id_table = pegasus_ids,
1487 .suspend = pegasus_suspend,
1488 .resume = pegasus_resume,
e1f12eb6 1489 .disable_hub_initiated_lpm = 1,
1da177e4
LT		 1490};
1491
cda2836d 1492static void __init parse_id(char *id)
a4f81a61 1493{
5a9dbfe0
NK		 1494 unsigned int vendor_id = 0, device_id = 0, flags = 0, i = 0;
1495 char *token, *name = NULL;
a4f81a61
Y		 1496
1497 if ((token = strsep(&id, ":")) != NULL)
1498 name = token;
1499 /* name now points to a null terminated string*/
1500 if ((token = strsep(&id, ":")) != NULL)
1501 vendor_id = simple_strtoul(token, NULL, 16);
1502 if ((token = strsep(&id, ":")) != NULL)
1503 device_id = simple_strtoul(token, NULL, 16);
1504 flags = simple_strtoul(id, NULL, 16);
1505 pr_info("%s: new device %s, vendor ID 0x%04x, device ID 0x%04x, flags: 0x%x\n",
5a9dbfe0 1506 driver_name, name, vendor_id, device_id, flags);
a4f81a61
Y		 1507
1508 if (vendor_id > 0x10000 || vendor_id == 0)
1509 return;
1510 if (device_id > 0x10000 || device_id == 0)
1511 return;
1512
5a9dbfe0 1513 for (i = 0; usb_dev_id[i].name; i++);
a4f81a61
Y		 1514 usb_dev_id[i].name = name;
1515 usb_dev_id[i].vendor = vendor_id;
1516 usb_dev_id[i].device = device_id;
1517 usb_dev_id[i].private = flags;
1518 pegasus_ids[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
1519 pegasus_ids[i].idVendor = vendor_id;
1520 pegasus_ids[i].idProduct = device_id;
1521}
1522
1da177e4
LT		 1523static int __init pegasus_init(void)
1524{
1525 pr_info("%s: %s, " DRIVER_DESC "\n", driver_name, DRIVER_VERSION);
a4f81a61
Y		 1526 if (devid)
1527 parse_id(devid);
1da177e4
LT		 1528 return usb_register(&pegasus_driver);
1529}
1530
1531static void __exit pegasus_exit(void)
1532{
1da177e4
LT		 1533 usb_deregister(&pegasus_driver);
1534}
1535
1536module_init(pegasus_init);
1537module_exit(pegasus_exit);
Linux 6.x block layer and io_uring tree(s)