drivers/usb/net/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 "v0.6.12 (2005/01/13)"
  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
  61 static struct usb_eth_dev usb_dev_id[] = {
  62 #define PEGASUS_DEV(pn, vid, pid, flags)        \
  63         {.name = pn, .vendor = vid, .device = pid, .private = flags},
  64 #include "pegasus.h"
  65 #undef  PEGASUS_DEV
  66         {NULL, 0, 0, 0}
  67 };
  68
  69 static struct usb_device_id pegasus_ids[] = {
  70 #define PEGASUS_DEV(pn, vid, pid, flags) \
  71         {.match_flags = USB_DEVICE_ID_MATCH_DEVICE, .idVendor = vid, .idProduct = pid},
  72 #include "pegasus.h"
  73 #undef  PEGASUS_DEV
  74         {}
  75 };
  76
  77 MODULE_AUTHOR(DRIVER_AUTHOR);
  78 MODULE_DESCRIPTION(DRIVER_DESC);
  79 MODULE_LICENSE("GPL");
  80 module_param(loopback, bool, 0);
  81 module_param(mii_mode, bool, 0);
  82 MODULE_PARM_DESC(loopback, "Enable MAC loopback mode (bit 0)");
  83 MODULE_PARM_DESC(mii_mode, "Enable HomePNA mode (bit 0),default=MII mode = 0");
  84
  85 /* use ethtool to change the level for any given device */
  86 static int msg_level = -1;
  87 module_param (msg_level, int, 0);
  88 MODULE_PARM_DESC (msg_level, "Override default message level");
  89
  90 MODULE_DEVICE_TABLE(usb, pegasus_ids);
  91
  92 static int update_eth_regs_async(pegasus_t *);
  93 /* Aargh!!! I _really_ hate such tweaks */
  94 static void ctrl_callback(struct urb *urb, struct pt_regs *regs)
  95 {
  96         pegasus_t *pegasus = urb->context;
  97
  98         if (!pegasus)
  99                 return;
 100
 101         switch (urb->status) {
 102         case 0:
 103                 if (pegasus->flags & ETH_REGS_CHANGE) {
 104                         pegasus->flags &= ~ETH_REGS_CHANGE;
 105                         pegasus->flags |= ETH_REGS_CHANGED;
 106                         update_eth_regs_async(pegasus);
 107                         return;
 108                 }
 109                 break;
 110         case -EINPROGRESS:
 111                 return;
 112         case -ENOENT:
 113                 break;
 114         default:
 115                 if (netif_msg_drv(pegasus))
 116                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 117                                 __FUNCTION__, urb->status);
 118         }
 119         pegasus->flags &= ~ETH_REGS_CHANGED;
 120         wake_up(&pegasus->ctrl_wait);
 121 }
 122
 123 static int get_registers(pegasus_t * pegasus, __u16 indx, __u16 size,
 124                          void *data)
 125 {
 126         int ret;
 127         char *buffer;
 128         DECLARE_WAITQUEUE(wait, current);
 129
 130         buffer = kmalloc(size, GFP_KERNEL);
 131         if (!buffer) {
 132                 if (netif_msg_drv(pegasus))
 133                         dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
 134                                         __FUNCTION__);
 135                 return -ENOMEM;
 136         }
 137         add_wait_queue(&pegasus->ctrl_wait, &wait);
 138         set_current_state(TASK_UNINTERRUPTIBLE);
 139         while (pegasus->flags & ETH_REGS_CHANGED)
 140                 schedule();
 141         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 142         set_current_state(TASK_RUNNING);
 143
 144         pegasus->dr.bRequestType = PEGASUS_REQT_READ;
 145         pegasus->dr.bRequest = PEGASUS_REQ_GET_REGS;
 146         pegasus->dr.wValue = cpu_to_le16(0);
 147         pegasus->dr.wIndex = cpu_to_le16p(&indx);
 148         pegasus->dr.wLength = cpu_to_le16p(&size);
 149         pegasus->ctrl_urb->transfer_buffer_length = size;
 150
 151         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 152                              usb_rcvctrlpipe(pegasus->usb, 0),
 153                              (char *) &pegasus->dr,
 154                              buffer, size, ctrl_callback, pegasus);
 155
 156         add_wait_queue(&pegasus->ctrl_wait, &wait);
 157         set_current_state(TASK_UNINTERRUPTIBLE);
 158
 159         /* using ATOMIC, we'd never wake up if we slept */
 160         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 161                 if (netif_msg_drv(pegasus))
 162                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 163                                         __FUNCTION__, ret);
 164                 goto out;
 165         }
 166
 167         schedule();
 168 out:
 169         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 170         memcpy(data, buffer, size);
 171         kfree(buffer);
 172
 173         return ret;
 174 }
 175
 176 static int set_registers(pegasus_t * pegasus, __u16 indx, __u16 size,
 177                          void *data)
 178 {
 179         int ret;
 180         char *buffer;
 181         DECLARE_WAITQUEUE(wait, current);
 182
 183         buffer = kmalloc(size, GFP_KERNEL);
 184         if (!buffer) {
 185                 if (netif_msg_drv(pegasus))
 186                         dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
 187                                         __FUNCTION__);
 188                 return -ENOMEM;
 189         }
 190         memcpy(buffer, data, size);
 191
 192         add_wait_queue(&pegasus->ctrl_wait, &wait);
 193         set_current_state(TASK_UNINTERRUPTIBLE);
 194         while (pegasus->flags & ETH_REGS_CHANGED)
 195                 schedule();
 196         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 197         set_current_state(TASK_RUNNING);
 198
 199         pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
 200         pegasus->dr.bRequest = PEGASUS_REQ_SET_REGS;
 201         pegasus->dr.wValue = cpu_to_le16(0);
 202         pegasus->dr.wIndex = cpu_to_le16p(&indx);
 203         pegasus->dr.wLength = cpu_to_le16p(&size);
 204         pegasus->ctrl_urb->transfer_buffer_length = size;
 205
 206         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 207                              usb_sndctrlpipe(pegasus->usb, 0),
 208                              (char *) &pegasus->dr,
 209                              buffer, size, ctrl_callback, pegasus);
 210
 211         add_wait_queue(&pegasus->ctrl_wait, &wait);
 212         set_current_state(TASK_UNINTERRUPTIBLE);
 213
 214         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 215                 if (netif_msg_drv(pegasus))
 216                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 217                                         __FUNCTION__, ret);
 218                 goto out;
 219         }
 220
 221         schedule();
 222 out:
 223         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 224         kfree(buffer);
 225
 226         return ret;
 227 }
 228
 229 static int set_register(pegasus_t * pegasus, __u16 indx, __u8 data)
 230 {
 231         int ret;
 232         char *tmp;
 233         DECLARE_WAITQUEUE(wait, current);
 234
 235         tmp = kmalloc(1, GFP_KERNEL);
 236         if (!tmp) {
 237                 if (netif_msg_drv(pegasus))
 238                         dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
 239                                         __FUNCTION__);
 240                 return -ENOMEM;
 241         }
 242         memcpy(tmp, &data, 1);
 243         add_wait_queue(&pegasus->ctrl_wait, &wait);
 244         set_current_state(TASK_UNINTERRUPTIBLE);
 245         while (pegasus->flags & ETH_REGS_CHANGED)
 246                 schedule();
 247         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 248         set_current_state(TASK_RUNNING);
 249
 250         pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
 251         pegasus->dr.bRequest = PEGASUS_REQ_SET_REG;
 252         pegasus->dr.wValue = cpu_to_le16(data);
 253         pegasus->dr.wIndex = cpu_to_le16p(&indx);
 254         pegasus->dr.wLength = cpu_to_le16(1);
 255         pegasus->ctrl_urb->transfer_buffer_length = 1;
 256
 257         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 258                              usb_sndctrlpipe(pegasus->usb, 0),
 259                              (char *) &pegasus->dr,
 260                              &tmp, 1, ctrl_callback, pegasus);
 261
 262         add_wait_queue(&pegasus->ctrl_wait, &wait);
 263         set_current_state(TASK_UNINTERRUPTIBLE);
 264
 265         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 266                 if (netif_msg_drv(pegasus))
 267                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 268                                         __FUNCTION__, ret);
 269                 goto out;
 270         }
 271
 272         schedule();
 273 out:
 274         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 275         kfree(tmp);
 276
 277         return ret;
 278 }
 279
 280 static int update_eth_regs_async(pegasus_t * pegasus)
 281 {
 282         int ret;
 283
 284         pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
 285         pegasus->dr.bRequest = PEGASUS_REQ_SET_REGS;
 286         pegasus->dr.wValue = 0;
 287         pegasus->dr.wIndex = cpu_to_le16(EthCtrl0);
 288         pegasus->dr.wLength = cpu_to_le16(3);
 289         pegasus->ctrl_urb->transfer_buffer_length = 3;
 290
 291         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 292                              usb_sndctrlpipe(pegasus->usb, 0),
 293                              (char *) &pegasus->dr,
 294                              pegasus->eth_regs, 3, ctrl_callback, pegasus);
 295
 296         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC)))
 297                 if (netif_msg_drv(pegasus))
 298                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 299                                         __FUNCTION__, ret);
 300
 301         return ret;
 302 }
 303
 304 static int read_mii_word(pegasus_t * pegasus, __u8 phy, __u8 indx, __u16 * regd)
 305 {
 306         int i;
 307         __u8 data[4] = { phy, 0, 0, indx };
 308         __le16 regdi;
 309         int ret;
 310
 311         ret = set_register(pegasus, PhyCtrl, 0);
 312         ret = set_registers(pegasus, PhyAddr, sizeof (data), data);
 313         ret = set_register(pegasus, PhyCtrl, (indx | PHY_READ));
 314         for (i = 0; i < REG_TIMEOUT; i++) {
 315                 ret = get_registers(pegasus, PhyCtrl, 1, data);
 316                 if (data[0] & PHY_DONE)
 317                         break;
 318         }
 319         if (i < REG_TIMEOUT) {
 320                 ret = get_registers(pegasus, PhyData, 2, &regdi);
 321                 *regd = le16_to_cpu(regdi);
 322                 return 1;
 323         }
 324         if (netif_msg_drv(pegasus))
 325                 dev_warn(&pegasus->intf->dev, "fail %s\n", __FUNCTION__);
 326
 327         return 0;
 328 }
 329
 330 static int mdio_read(struct net_device *dev, int phy_id, int loc)
 331 {
 332         pegasus_t *pegasus = (pegasus_t *) netdev_priv(dev);
 333         u16 res;
 334
 335         read_mii_word(pegasus, phy_id, loc, &res);
 336         return (int)res;
 337 }
 338
 339 static int write_mii_word(pegasus_t * pegasus, __u8 phy, __u8 indx, __u16 regd)
 340 {
 341         int i;
 342         __u8 data[4] = { phy, 0, 0, indx };
 343         int ret;
 344
 345         data[1] = (u8) regd;
 346         data[2] = (u8) (regd >> 8);
 347         ret = set_register(pegasus, PhyCtrl, 0);
 348         ret = set_registers(pegasus, PhyAddr, sizeof(data), data);
 349         ret = set_register(pegasus, PhyCtrl, (indx | PHY_WRITE));
 350         for (i = 0; i < REG_TIMEOUT; i++) {
 351                 ret = get_registers(pegasus, PhyCtrl, 1, data);
 352                 if (data[0] & PHY_DONE)
 353                         break;
 354         }
 355         if (i < REG_TIMEOUT)
 356                 return 0;
 357
 358         if (netif_msg_drv(pegasus))
 359                 dev_warn(&pegasus->intf->dev, "fail %s\n", __FUNCTION__);
 360         return 1;
 361 }
 362
 363 static void mdio_write(struct net_device *dev, int phy_id, int loc, int val)
 364 {
 365         pegasus_t *pegasus = (pegasus_t *) netdev_priv(dev);
 366
 367         write_mii_word(pegasus, phy_id, loc, val);
 368 }
 369
 370 static int read_eprom_word(pegasus_t * pegasus, __u8 index, __u16 * retdata)
 371 {
 372         int i;
 373         __u8 tmp;
 374         __le16 retdatai;
 375         int ret;
 376
 377         ret = set_register(pegasus, EpromCtrl, 0);
 378         ret = set_register(pegasus, EpromOffset, index);
 379         ret = set_register(pegasus, EpromCtrl, EPROM_READ);
 380
 381         for (i = 0; i < REG_TIMEOUT; i++) {
 382                 ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
 383                 if (tmp & EPROM_DONE)
 384                         break;
 385         }
 386         if (i < REG_TIMEOUT) {
 387                 ret = get_registers(pegasus, EpromData, 2, &retdatai);
 388                 *retdata = le16_to_cpu(retdatai);
 389                 return 0;
 390         }
 391
 392         if (netif_msg_drv(pegasus))
 393                 dev_warn(&pegasus->intf->dev, "fail %s\n", __FUNCTION__);
 394         return -1;
 395 }
 396
 397 #ifdef  PEGASUS_WRITE_EEPROM
 398 static inline void enable_eprom_write(pegasus_t * pegasus)
 399 {
 400         __u8 tmp;
 401         int ret;
 402
 403         ret = get_registers(pegasus, EthCtrl2, 1, &tmp);
 404         ret = set_register(pegasus, EthCtrl2, tmp | EPROM_WR_ENABLE);
 405 }
 406
 407 static inline void disable_eprom_write(pegasus_t * pegasus)
 408 {
 409         __u8 tmp;
 410         int ret;
 411
 412         ret = get_registers(pegasus, EthCtrl2, 1, &tmp);
 413         ret = set_register(pegasus, EpromCtrl, 0);
 414         ret = set_register(pegasus, EthCtrl2, tmp & ~EPROM_WR_ENABLE);
 415 }
 416
 417 static int write_eprom_word(pegasus_t * pegasus, __u8 index, __u16 data)
 418 {
 419         int i;
 420         __u8 tmp, d[4] = { 0x3f, 0, 0, EPROM_WRITE };
 421         int ret;
 422
 423         ret = set_registers(pegasus, EpromOffset, 4, d);
 424         enable_eprom_write(pegasus);
 425         ret = set_register(pegasus, EpromOffset, index);
 426         ret = set_registers(pegasus, EpromData, 2, &data);
 427         ret = set_register(pegasus, EpromCtrl, EPROM_WRITE);
 428
 429         for (i = 0; i < REG_TIMEOUT; i++) {
 430                 ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
 431                 if (tmp & EPROM_DONE)
 432                         break;
 433         }
 434         disable_eprom_write(pegasus);
 435         if (i < REG_TIMEOUT)
 436                 return 0;
 437         if (netif_msg_drv(pegasus))
 438                 dev_warn(&pegasus->intf->dev, "fail %s\n", __FUNCTION__);
 439         return -1;
 440 }
 441 #endif                          /* PEGASUS_WRITE_EEPROM */
 442
 443 static inline void get_node_id(pegasus_t * pegasus, __u8 * id)
 444 {
 445         int i;
 446         __u16 w16;
 447
 448         for (i = 0; i < 3; i++) {
 449                 read_eprom_word(pegasus, i, &w16);
 450                 ((__le16 *) id)[i] = cpu_to_le16p(&w16);
 451         }
 452 }
 453
 454 static void set_ethernet_addr(pegasus_t * pegasus)
 455 {
 456         __u8 node_id[6];
 457         int ret;
 458
 459         get_node_id(pegasus, node_id);
 460         ret = set_registers(pegasus, EthID, sizeof (node_id), node_id);
 461         memcpy(pegasus->net->dev_addr, node_id, sizeof (node_id));
 462 }
 463
 464 static inline int reset_mac(pegasus_t * pegasus)
 465 {
 466         __u8 data = 0x8;
 467         int i;
 468         int ret;
 469
 470         ret = set_register(pegasus, EthCtrl1, data);
 471         for (i = 0; i < REG_TIMEOUT; i++) {
 472                 ret = get_registers(pegasus, EthCtrl1, 1, &data);
 473                 if (~data & 0x08) {
 474                         if (loopback & 1)
 475                                 break;
 476                         if (mii_mode && (pegasus->features & HAS_HOME_PNA))
 477                                 ret = set_register(pegasus, Gpio1, 0x34);
 478                         else
 479                                 ret = set_register(pegasus, Gpio1, 0x26);
 480                         ret = set_register(pegasus, Gpio0, pegasus->features);
 481                         ret = set_register(pegasus, Gpio0, DEFAULT_GPIO_SET);
 482                         break;
 483                 }
 484         }
 485         if (i == REG_TIMEOUT)
 486                 return 1;
 487
 488         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
 489             usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
 490                 ret = set_register(pegasus, Gpio0, 0x24);
 491                 ret = set_register(pegasus, Gpio0, 0x26);
 492         }
 493         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_ELCON) {
 494                 __u16 auxmode;
 495                 read_mii_word(pegasus, 3, 0x1b, &auxmode);
 496                 write_mii_word(pegasus, 3, 0x1b, auxmode | 4);
 497         }
 498
 499         return 0;
 500 }
 501
 502 static int enable_net_traffic(struct net_device *dev, struct usb_device *usb)
 503 {
 504         __u16 linkpart;
 505         __u8 data[4];
 506         pegasus_t *pegasus = netdev_priv(dev);
 507         int ret;
 508
 509         read_mii_word(pegasus, pegasus->phy, MII_LPA, &linkpart);
 510         data[0] = 0xc9;
 511         data[1] = 0;
 512         if (linkpart & (ADVERTISE_100FULL | ADVERTISE_10FULL))
 513                 data[1] |= 0x20;        /* set full duplex */
 514         if (linkpart & (ADVERTISE_100FULL | ADVERTISE_100HALF))
 515                 data[1] |= 0x10;        /* set 100 Mbps */
 516         if (mii_mode)
 517                 data[1] = 0;
 518         data[2] = (loopback & 1) ? 0x09 : 0x01;
 519
 520         memcpy(pegasus->eth_regs, data, sizeof (data));
 521         ret = set_registers(pegasus, EthCtrl0, 3, data);
 522
 523         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
 524             usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
 525                 u16 auxmode;
 526                 read_mii_word(pegasus, 0, 0x1b, &auxmode);
 527                 write_mii_word(pegasus, 0, 0x1b, auxmode | 4);
 528         }
 529
 530         return 0;
 531 }
 532
 533 static void fill_skb_pool(pegasus_t * pegasus)
 534 {
 535         int i;
 536
 537         for (i = 0; i < RX_SKBS; i++) {
 538                 if (pegasus->rx_pool[i])
 539                         continue;
 540                 pegasus->rx_pool[i] = dev_alloc_skb(PEGASUS_MTU + 2);
 541                 /*
 542                  ** we give up if the allocation fail. the tasklet will be
 543                  ** rescheduled again anyway...
 544                  */
 545                 if (pegasus->rx_pool[i] == NULL)
 546                         return;
 547                 pegasus->rx_pool[i]->dev = pegasus->net;
 548                 skb_reserve(pegasus->rx_pool[i], 2);
 549         }
 550 }
 551
 552 static void free_skb_pool(pegasus_t * pegasus)
 553 {
 554         int i;
 555
 556         for (i = 0; i < RX_SKBS; i++) {
 557                 if (pegasus->rx_pool[i]) {
 558                         dev_kfree_skb(pegasus->rx_pool[i]);
 559                         pegasus->rx_pool[i] = NULL;
 560                 }
 561         }
 562 }
 563
 564 static inline struct sk_buff *pull_skb(pegasus_t * pegasus)
 565 {
 566         int i;
 567         struct sk_buff *skb;
 568
 569         for (i = 0; i < RX_SKBS; i++) {
 570                 if (likely(pegasus->rx_pool[i] != NULL)) {
 571                         skb = pegasus->rx_pool[i];
 572                         pegasus->rx_pool[i] = NULL;
 573                         return skb;
 574                 }
 575         }
 576         return NULL;
 577 }
 578
 579 static void read_bulk_callback(struct urb *urb, struct pt_regs *regs)
 580 {
 581         pegasus_t *pegasus = urb->context;
 582         struct net_device *net;
 583         int rx_status, count = urb->actual_length;
 584         u8 *buf = urb->transfer_buffer;
 585         __u16 pkt_len;
 586
 587         if (!pegasus)
 588                 return;
 589
 590         net = pegasus->net;
 591         if (!netif_device_present(net) || !netif_running(net))
 592                 return;
 593
 594         switch (urb->status) {
 595         case 0:
 596                 break;
 597         case -ETIMEDOUT:
 598                 if (netif_msg_rx_err(pegasus))
 599                         pr_debug("%s: reset MAC\n", net->name);
 600                 pegasus->flags &= ~PEGASUS_RX_BUSY;
 601                 break;
 602         case -EPIPE:            /* stall, or disconnect from TT */
 603                 /* FIXME schedule work to clear the halt */
 604                 if (netif_msg_rx_err(pegasus))
 605                         printk(KERN_WARNING "%s: no rx stall recovery\n",
 606                                         net->name);
 607                 return;
 608         case -ENOENT:
 609         case -ECONNRESET:
 610         case -ESHUTDOWN:
 611                 if (netif_msg_ifdown(pegasus))
 612                         pr_debug("%s: rx unlink, %d\n", net->name, urb->status);
 613                 return;
 614         default:
 615                 if (netif_msg_rx_err(pegasus))
 616                         pr_debug("%s: RX status %d\n", net->name, urb->status);
 617                 goto goon;
 618         }
 619
 620         if (!count || count < 4)
 621                 goto goon;
 622
 623         rx_status = buf[count - 2];
 624         if (rx_status & 0x1e) {
 625                 if (netif_msg_rx_err(pegasus))
 626                         pr_debug("%s: RX packet error %x\n",
 627                                         net->name, rx_status);
 628                 pegasus->stats.rx_errors++;
 629                 if (rx_status & 0x06)   // long or runt
 630                         pegasus->stats.rx_length_errors++;
 631                 if (rx_status & 0x08)
 632                         pegasus->stats.rx_crc_errors++;
 633                 if (rx_status & 0x10)   // extra bits
 634                         pegasus->stats.rx_frame_errors++;
 635                 goto goon;
 636         }
 637         if (pegasus->chip == 0x8513) {
 638                 pkt_len = le32_to_cpu(*(__le32 *)urb->transfer_buffer);
 639                 pkt_len &= 0x0fff;
 640                 pegasus->rx_skb->data += 2;
 641         } else {
 642                 pkt_len = buf[count - 3] << 8;
 643                 pkt_len += buf[count - 4];
 644                 pkt_len &= 0xfff;
 645                 pkt_len -= 8;
 646         }
 647
 648         /*
 649          * If the packet is unreasonably long, quietly drop it rather than
 650          * kernel panicing by calling skb_put.
 651          */
 652         if (pkt_len > PEGASUS_MTU)
 653                 goto goon;
 654
 655         /*
 656          * at this point we are sure pegasus->rx_skb != NULL
 657          * so we go ahead and pass up the packet.
 658          */
 659         skb_put(pegasus->rx_skb, pkt_len);
 660         pegasus->rx_skb->protocol = eth_type_trans(pegasus->rx_skb, net);
 661         netif_rx(pegasus->rx_skb);
 662         pegasus->stats.rx_packets++;
 663         pegasus->stats.rx_bytes += pkt_len;
 664
 665         if (pegasus->flags & PEGASUS_UNPLUG)
 666                 return;
 667
 668         spin_lock(&pegasus->rx_pool_lock);
 669         pegasus->rx_skb = pull_skb(pegasus);
 670         spin_unlock(&pegasus->rx_pool_lock);
 671
 672         if (pegasus->rx_skb == NULL)
 673                 goto tl_sched;
 674 goon:
 675         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
 676                           usb_rcvbulkpipe(pegasus->usb, 1),
 677                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
 678                           read_bulk_callback, pegasus);
 679         if (usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC)) {
 680                 pegasus->flags |= PEGASUS_RX_URB_FAIL;
 681                 goto tl_sched;
 682         } else {
 683                 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
 684         }
 685
 686         return;
 687
 688 tl_sched:
 689         tasklet_schedule(&pegasus->rx_tl);
 690 }
 691
 692 static void rx_fixup(unsigned long data)
 693 {
 694         pegasus_t *pegasus;
 695         unsigned long flags;
 696
 697         pegasus = (pegasus_t *) data;
 698         if (pegasus->flags & PEGASUS_UNPLUG)
 699                 return;
 700
 701         spin_lock_irqsave(&pegasus->rx_pool_lock, flags);
 702         fill_skb_pool(pegasus);
 703         if (pegasus->flags & PEGASUS_RX_URB_FAIL)
 704                 if (pegasus->rx_skb)
 705                         goto try_again;
 706         if (pegasus->rx_skb == NULL) {
 707                 pegasus->rx_skb = pull_skb(pegasus);
 708         }
 709         if (pegasus->rx_skb == NULL) {
 710                 if (netif_msg_rx_err(pegasus))
 711                         printk(KERN_WARNING "%s: low on memory\n",
 712                                         pegasus->net->name);
 713                 tasklet_schedule(&pegasus->rx_tl);
 714                 goto done;
 715         }
 716         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
 717                           usb_rcvbulkpipe(pegasus->usb, 1),
 718                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
 719                           read_bulk_callback, pegasus);
 720 try_again:
 721         if (usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC)) {
 722                 pegasus->flags |= PEGASUS_RX_URB_FAIL;
 723                 tasklet_schedule(&pegasus->rx_tl);
 724         } else {
 725                 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
 726         }
 727 done:
 728         spin_unlock_irqrestore(&pegasus->rx_pool_lock, flags);
 729 }
 730
 731 static void write_bulk_callback(struct urb *urb, struct pt_regs *regs)
 732 {
 733         pegasus_t *pegasus = urb->context;
 734         struct net_device *net = pegasus->net;
 735
 736         if (!pegasus)
 737                 return;
 738
 739         if (!netif_device_present(net) || !netif_running(net))
 740                 return;
 741
 742         switch (urb->status) {
 743         case -EPIPE:
 744                 /* FIXME schedule_work() to clear the tx halt */
 745                 netif_stop_queue(net);
 746                 if (netif_msg_tx_err(pegasus))
 747                         printk(KERN_WARNING "%s: no tx stall recovery\n",
 748                                         net->name);
 749                 return;
 750         case -ENOENT:
 751         case -ECONNRESET:
 752         case -ESHUTDOWN:
 753                 if (netif_msg_ifdown(pegasus))
 754                         pr_debug("%s: tx unlink, %d\n", net->name, urb->status);
 755                 return;
 756         default:
 757                 if (netif_msg_tx_err(pegasus))
 758                         pr_info("%s: TX status %d\n", net->name, urb->status);
 759                 /* FALL THROUGH */
 760         case 0:
 761                 break;
 762         }
 763
 764         net->trans_start = jiffies;
 765         netif_wake_queue(net);
 766 }
 767
 768 static void intr_callback(struct urb *urb, struct pt_regs *regs)
 769 {
 770         pegasus_t *pegasus = urb->context;
 771         struct net_device *net;
 772         int status;
 773
 774         if (!pegasus)
 775                 return;
 776         net = pegasus->net;
 777
 778         switch (urb->status) {
 779         case 0:
 780                 break;
 781         case -ECONNRESET:       /* unlink */
 782         case -ENOENT:
 783         case -ESHUTDOWN:
 784                 return;
 785         default:
 786                 /* some Pegasus-I products report LOTS of data
 787                  * toggle errors... avoid log spamming
 788                  */
 789                 if (netif_msg_timer(pegasus))
 790                         pr_debug("%s: intr status %d\n", net->name,
 791                                         urb->status);
 792         }
 793
 794         if (urb->actual_length >= 6) {
 795                 u8      * d = urb->transfer_buffer;
 796
 797                 /* byte 0 == tx_status1, reg 2B */
 798                 if (d[0] & (TX_UNDERRUN|EXCESSIVE_COL
 799                                         |LATE_COL|JABBER_TIMEOUT)) {
 800                         pegasus->stats.tx_errors++;
 801                         if (d[0] & TX_UNDERRUN)
 802                                 pegasus->stats.tx_fifo_errors++;
 803                         if (d[0] & (EXCESSIVE_COL | JABBER_TIMEOUT))
 804                                 pegasus->stats.tx_aborted_errors++;
 805                         if (d[0] & LATE_COL)
 806                                 pegasus->stats.tx_window_errors++;
 807                 }
 808
 809                 /* d[5].LINK_STATUS lies on some adapters.
 810                  * d[0].NO_CARRIER kicks in only with failed TX.
 811                  * ... so monitoring with MII may be safest.
 812                  */
 813                 if (d[0] & NO_CARRIER)
 814                         netif_carrier_off(net);
 815                 else
 816                         netif_carrier_on(net);
 817
 818                 /* bytes 3-4 == rx_lostpkt, reg 2E/2F */
 819                 pegasus->stats.rx_missed_errors += ((d[3] & 0x7f) << 8) | d[4];
 820         }
 821
 822         status = usb_submit_urb(urb, SLAB_ATOMIC);
 823         if (status && netif_msg_timer(pegasus))
 824                 printk(KERN_ERR "%s: can't resubmit interrupt urb, %d\n",
 825                                 net->name, status);
 826 }
 827
 828 static void pegasus_tx_timeout(struct net_device *net)
 829 {
 830         pegasus_t *pegasus = netdev_priv(net);
 831         if (netif_msg_timer(pegasus))
 832                 printk(KERN_WARNING "%s: tx timeout\n", net->name);
 833         usb_unlink_urb(pegasus->tx_urb);
 834         pegasus->stats.tx_errors++;
 835 }
 836
 837 static int pegasus_start_xmit(struct sk_buff *skb, struct net_device *net)
 838 {
 839         pegasus_t *pegasus = netdev_priv(net);
 840         int count = ((skb->len + 2) & 0x3f) ? skb->len + 2 : skb->len + 3;
 841         int res;
 842         __u16 l16 = skb->len;
 843
 844         netif_stop_queue(net);
 845
 846         ((__le16 *) pegasus->tx_buff)[0] = cpu_to_le16(l16);
 847         memcpy(pegasus->tx_buff + 2, skb->data, skb->len);
 848         usb_fill_bulk_urb(pegasus->tx_urb, pegasus->usb,
 849                           usb_sndbulkpipe(pegasus->usb, 2),
 850                           pegasus->tx_buff, count,
 851                           write_bulk_callback, pegasus);
 852         if ((res = usb_submit_urb(pegasus->tx_urb, GFP_ATOMIC))) {
 853                 if (netif_msg_tx_err(pegasus))
 854                         printk(KERN_WARNING "%s: fail tx, %d\n",
 855                                         net->name, res);
 856                 switch (res) {
 857                 case -EPIPE:            /* stall, or disconnect from TT */
 858                         /* cleanup should already have been scheduled */
 859                         break;
 860                 case -ENODEV:           /* disconnect() upcoming */
 861                         break;
 862                 default:
 863                         pegasus->stats.tx_errors++;
 864                         netif_start_queue(net);
 865                 }
 866         } else {
 867                 pegasus->stats.tx_packets++;
 868                 pegasus->stats.tx_bytes += skb->len;
 869                 net->trans_start = jiffies;
 870         }
 871         dev_kfree_skb(skb);
 872
 873         return 0;
 874 }
 875
 876 static struct net_device_stats *pegasus_netdev_stats(struct net_device *dev)
 877 {
 878         return &((pegasus_t *) netdev_priv(dev))->stats;
 879 }
 880
 881 static inline void disable_net_traffic(pegasus_t * pegasus)
 882 {
 883         int tmp = 0;
 884         int ret;
 885
 886         ret = set_registers(pegasus, EthCtrl0, 2, &tmp);
 887 }
 888
 889 static inline void get_interrupt_interval(pegasus_t * pegasus)
 890 {
 891         __u8 data[2];
 892
 893         read_eprom_word(pegasus, 4, (__u16 *) data);
 894         if (pegasus->usb->speed != USB_SPEED_HIGH) {
 895                 if (data[1] < 0x80) {
 896                         if (netif_msg_timer(pegasus))
 897                                 dev_info(&pegasus->intf->dev, "intr interval "
 898                                         "changed from %ums to %ums\n",
 899                                         data[1], 0x80);
 900                         data[1] = 0x80;
 901 #ifdef PEGASUS_WRITE_EEPROM
 902                         write_eprom_word(pegasus, 4, *(__u16 *) data);
 903 #endif
 904                 }
 905         }
 906         pegasus->intr_interval = data[1];
 907 }
 908
 909 static void set_carrier(struct net_device *net)
 910 {
 911         pegasus_t *pegasus = netdev_priv(net);
 912         u16 tmp;
 913
 914         if (!read_mii_word(pegasus, pegasus->phy, MII_BMSR, &tmp))
 915                 return;
 916
 917         if (tmp & BMSR_LSTATUS)
 918                 netif_carrier_on(net);
 919         else
 920                 netif_carrier_off(net);
 921 }
 922
 923 static void free_all_urbs(pegasus_t * pegasus)
 924 {
 925         usb_free_urb(pegasus->intr_urb);
 926         usb_free_urb(pegasus->tx_urb);
 927         usb_free_urb(pegasus->rx_urb);
 928         usb_free_urb(pegasus->ctrl_urb);
 929 }
 930
 931 static void unlink_all_urbs(pegasus_t * pegasus)
 932 {
 933         usb_kill_urb(pegasus->intr_urb);
 934         usb_kill_urb(pegasus->tx_urb);
 935         usb_kill_urb(pegasus->rx_urb);
 936         usb_kill_urb(pegasus->ctrl_urb);
 937 }
 938
 939 static int alloc_urbs(pegasus_t * pegasus)
 940 {
 941         pegasus->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
 942         if (!pegasus->ctrl_urb) {
 943                 return 0;
 944         }
 945         pegasus->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 946         if (!pegasus->rx_urb) {
 947                 usb_free_urb(pegasus->ctrl_urb);
 948                 return 0;
 949         }
 950         pegasus->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 951         if (!pegasus->tx_urb) {
 952                 usb_free_urb(pegasus->rx_urb);
 953                 usb_free_urb(pegasus->ctrl_urb);
 954                 return 0;
 955         }
 956         pegasus->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
 957         if (!pegasus->intr_urb) {
 958                 usb_free_urb(pegasus->tx_urb);
 959                 usb_free_urb(pegasus->rx_urb);
 960                 usb_free_urb(pegasus->ctrl_urb);
 961                 return 0;
 962         }
 963
 964         return 1;
 965 }
 966
 967 static int pegasus_open(struct net_device *net)
 968 {
 969         pegasus_t *pegasus = netdev_priv(net);
 970         int res;
 971
 972         if (pegasus->rx_skb == NULL)
 973                 pegasus->rx_skb = pull_skb(pegasus);
 974         /*
 975          ** Note: no point to free the pool.  it is empty :-)
 976          */
 977         if (!pegasus->rx_skb)
 978                 return -ENOMEM;
 979
 980         res = set_registers(pegasus, EthID, 6, net->dev_addr);
 981
 982         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
 983                           usb_rcvbulkpipe(pegasus->usb, 1),
 984                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
 985                           read_bulk_callback, pegasus);
 986         if ((res = usb_submit_urb(pegasus->rx_urb, GFP_KERNEL))) {
 987                 if (netif_msg_ifup(pegasus))
 988                         pr_debug("%s: failed rx_urb, %d", net->name, res);
 989                 goto exit;
 990         }
 991
 992         usb_fill_int_urb(pegasus->intr_urb, pegasus->usb,
 993                          usb_rcvintpipe(pegasus->usb, 3),
 994                          pegasus->intr_buff, sizeof (pegasus->intr_buff),
 995                          intr_callback, pegasus, pegasus->intr_interval);
 996         if ((res = usb_submit_urb(pegasus->intr_urb, GFP_KERNEL))) {
 997                 if (netif_msg_ifup(pegasus))
 998                         pr_debug("%s: failed intr_urb, %d\n", net->name, res);
 999                 usb_kill_urb(pegasus->rx_urb);
1000                 goto exit;
1001         }
1002         if ((res = enable_net_traffic(net, pegasus->usb))) {
1003                 if (netif_msg_ifup(pegasus))
1004                         pr_debug("%s: can't enable_net_traffic() - %d\n",
1005                                         net->name, res);
1006                 res = -EIO;
1007                 usb_kill_urb(pegasus->rx_urb);
1008                 usb_kill_urb(pegasus->intr_urb);
1009                 free_skb_pool(pegasus);
1010                 goto exit;
1011         }
1012         set_carrier(net);
1013         netif_start_queue(net);
1014         if (netif_msg_ifup(pegasus))
1015                 pr_debug("%s: open\n", net->name);
1016         res = 0;
1017 exit:
1018         return res;
1019 }
1020
1021 static int pegasus_close(struct net_device *net)
1022 {
1023         pegasus_t *pegasus = netdev_priv(net);
1024
1025         netif_stop_queue(net);
1026         if (!(pegasus->flags & PEGASUS_UNPLUG))
1027                 disable_net_traffic(pegasus);
1028         tasklet_kill(&pegasus->rx_tl);
1029         unlink_all_urbs(pegasus);
1030
1031         return 0;
1032 }
1033
1034 static void pegasus_get_drvinfo(struct net_device *dev,
1035                                 struct ethtool_drvinfo *info)
1036 {
1037         pegasus_t *pegasus = netdev_priv(dev);
1038         strncpy(info->driver, driver_name, sizeof (info->driver) - 1);
1039         strncpy(info->version, DRIVER_VERSION, sizeof (info->version) - 1);
1040         usb_make_path(pegasus->usb, info->bus_info, sizeof (info->bus_info));
1041 }
1042
1043 /* also handles three patterns of some kind in hardware */
1044 #define WOL_SUPPORTED   (WAKE_MAGIC|WAKE_PHY)
1045
1046 static void
1047 pegasus_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1048 {
1049         pegasus_t       *pegasus = netdev_priv(dev);
1050
1051         wol->supported = WAKE_MAGIC | WAKE_PHY;
1052         wol->wolopts = pegasus->wolopts;
1053 }
1054
1055 static int
1056 pegasus_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1057 {
1058         pegasus_t       *pegasus = netdev_priv(dev);
1059         u8              reg78 = 0x04;
1060
1061         if (wol->wolopts & ~WOL_SUPPORTED)
1062                 return -EINVAL;
1063
1064         if (wol->wolopts & WAKE_MAGIC)
1065                 reg78 |= 0x80;
1066         if (wol->wolopts & WAKE_PHY)
1067                 reg78 |= 0x40;
1068         /* FIXME this 0x10 bit still needs to get set in the chip... */
1069         if (wol->wolopts)
1070                 pegasus->eth_regs[0] |= 0x10;
1071         else
1072                 pegasus->eth_regs[0] &= ~0x10;
1073         pegasus->wolopts = wol->wolopts;
1074         return set_register(pegasus, WakeupControl, reg78);
1075 }
1076
1077 static inline void pegasus_reset_wol(struct net_device *dev)
1078 {
1079         struct ethtool_wolinfo wol;
1080
1081         memset(&wol, 0, sizeof wol);
1082         (void) pegasus_set_wol(dev, &wol);
1083 }
1084
1085 static int
1086 pegasus_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1087 {
1088         pegasus_t *pegasus;
1089
1090         if (in_atomic())
1091                 return 0;
1092
1093         pegasus = netdev_priv(dev);
1094         mii_ethtool_gset(&pegasus->mii, ecmd);
1095
1096         return 0;
1097 }
1098
1099 static int
1100 pegasus_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1101 {
1102         pegasus_t *pegasus = netdev_priv(dev);
1103         return mii_ethtool_sset(&pegasus->mii, ecmd);
1104 }
1105
1106 static int pegasus_nway_reset(struct net_device *dev)
1107 {
1108         pegasus_t *pegasus = netdev_priv(dev);
1109         return mii_nway_restart(&pegasus->mii);
1110 }
1111
1112 static u32 pegasus_get_link(struct net_device *dev)
1113 {
1114         pegasus_t *pegasus = netdev_priv(dev);
1115         return mii_link_ok(&pegasus->mii);
1116 }
1117
1118 static u32 pegasus_get_msglevel(struct net_device *dev)
1119 {
1120         pegasus_t *pegasus = netdev_priv(dev);
1121         return pegasus->msg_enable;
1122 }
1123
1124 static void pegasus_set_msglevel(struct net_device *dev, u32 v)
1125 {
1126         pegasus_t *pegasus = netdev_priv(dev);
1127         pegasus->msg_enable = v;
1128 }
1129
1130 static struct ethtool_ops ops = {
1131         .get_drvinfo = pegasus_get_drvinfo,
1132         .get_settings = pegasus_get_settings,
1133         .set_settings = pegasus_set_settings,
1134         .nway_reset = pegasus_nway_reset,
1135         .get_link = pegasus_get_link,
1136         .get_msglevel = pegasus_get_msglevel,
1137         .set_msglevel = pegasus_set_msglevel,
1138         .get_wol = pegasus_get_wol,
1139         .set_wol = pegasus_set_wol,
1140 };
1141
1142 static int pegasus_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
1143 {
1144         __u16 *data = (__u16 *) & rq->ifr_ifru;
1145         pegasus_t *pegasus = netdev_priv(net);
1146         int res;
1147
1148         switch (cmd) {
1149         case SIOCDEVPRIVATE:
1150                 data[0] = pegasus->phy;
1151         case SIOCDEVPRIVATE + 1:
1152                 read_mii_word(pegasus, data[0], data[1] & 0x1f, &data[3]);
1153                 res = 0;
1154                 break;
1155         case SIOCDEVPRIVATE + 2:
1156                 if (!capable(CAP_NET_ADMIN))
1157                         return -EPERM;
1158                 write_mii_word(pegasus, pegasus->phy, data[1] & 0x1f, data[2]);
1159                 res = 0;
1160                 break;
1161         default:
1162                 res = -EOPNOTSUPP;
1163         }
1164         return res;
1165 }
1166
1167 static void pegasus_set_multicast(struct net_device *net)
1168 {
1169         pegasus_t *pegasus = netdev_priv(net);
1170
1171         if (net->flags & IFF_PROMISC) {
1172                 pegasus->eth_regs[EthCtrl2] |= RX_PROMISCUOUS;
1173                 if (netif_msg_link(pegasus))
1174                         pr_info("%s: Promiscuous mode enabled.\n", net->name);
1175         } else if (net->mc_count ||
1176                    (net->flags & IFF_ALLMULTI)) {
1177                 pegasus->eth_regs[EthCtrl0] |= RX_MULTICAST;
1178                 pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1179                 if (netif_msg_link(pegasus))
1180                         pr_info("%s: set allmulti\n", net->name);
1181         } else {
1182                 pegasus->eth_regs[EthCtrl0] &= ~RX_MULTICAST;
1183                 pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1184         }
1185
1186         pegasus->flags |= ETH_REGS_CHANGE;
1187         ctrl_callback(pegasus->ctrl_urb, NULL);
1188 }
1189
1190 static __u8 mii_phy_probe(pegasus_t * pegasus)
1191 {
1192         int i;
1193         __u16 tmp;
1194
1195         for (i = 0; i < 32; i++) {
1196                 read_mii_word(pegasus, i, MII_BMSR, &tmp);
1197                 if (tmp == 0 || tmp == 0xffff || (tmp & BMSR_MEDIA) == 0)
1198                         continue;
1199                 else
1200                         return i;
1201         }
1202
1203         return 0xff;
1204 }
1205
1206 static inline void setup_pegasus_II(pegasus_t * pegasus)
1207 {
1208         __u8 data = 0xa5;
1209         int ret;
1210
1211         ret = set_register(pegasus, Reg1d, 0);
1212         ret = set_register(pegasus, Reg7b, 1);
1213         mdelay(100);
1214         if ((pegasus->features & HAS_HOME_PNA) && mii_mode)
1215                 ret = set_register(pegasus, Reg7b, 0);
1216         else
1217                 ret = set_register(pegasus, Reg7b, 2);
1218
1219         ret = set_register(pegasus, 0x83, data);
1220         ret = get_registers(pegasus, 0x83, 1, &data);
1221
1222         if (data == 0xa5) {
1223                 pegasus->chip = 0x8513;
1224         } else {
1225                 pegasus->chip = 0;
1226         }
1227
1228         ret = set_register(pegasus, 0x80, 0xc0);
1229         ret = set_register(pegasus, 0x83, 0xff);
1230         ret = set_register(pegasus, 0x84, 0x01);
1231
1232         if (pegasus->features & HAS_HOME_PNA && mii_mode)
1233                 ret = set_register(pegasus, Reg81, 6);
1234         else
1235                 ret = set_register(pegasus, Reg81, 2);
1236 }
1237
1238
1239 static struct workqueue_struct *pegasus_workqueue = NULL;
1240 #define CARRIER_CHECK_DELAY (2 * HZ)
1241
1242 static void check_carrier(void *data)
1243 {
1244         pegasus_t *pegasus = data;
1245         set_carrier(pegasus->net);
1246         if (!(pegasus->flags & PEGASUS_UNPLUG)) {
1247                 queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1248                         CARRIER_CHECK_DELAY);
1249         }
1250 }
1251
1252 static int pegasus_probe(struct usb_interface *intf,
1253                          const struct usb_device_id *id)
1254 {
1255         struct usb_device *dev = interface_to_usbdev(intf);
1256         struct net_device *net;
1257         pegasus_t *pegasus;
1258         int dev_index = id - pegasus_ids;
1259         int res = -ENOMEM;
1260
1261         usb_get_dev(dev);
1262         net = alloc_etherdev(sizeof(struct pegasus));
1263         if (!net) {
1264                 dev_err(&intf->dev, "can't allocate %s\n", "device");
1265                 goto out;
1266         }
1267
1268         pegasus = netdev_priv(net);
1269         memset(pegasus, 0, sizeof (struct pegasus));
1270         pegasus->dev_index = dev_index;
1271         init_waitqueue_head(&pegasus->ctrl_wait);
1272
1273         if (!alloc_urbs(pegasus)) {
1274                 dev_err(&intf->dev, "can't allocate %s\n", "urbs");
1275                 goto out1;
1276         }
1277
1278         tasklet_init(&pegasus->rx_tl, rx_fixup, (unsigned long) pegasus);
1279
1280         INIT_WORK(&pegasus->carrier_check, check_carrier, pegasus);
1281
1282         pegasus->intf = intf;
1283         pegasus->usb = dev;
1284         pegasus->net = net;
1285         SET_MODULE_OWNER(net);
1286         net->open = pegasus_open;
1287         net->stop = pegasus_close;
1288         net->watchdog_timeo = PEGASUS_TX_TIMEOUT;
1289         net->tx_timeout = pegasus_tx_timeout;
1290         net->do_ioctl = pegasus_ioctl;
1291         net->hard_start_xmit = pegasus_start_xmit;
1292         net->set_multicast_list = pegasus_set_multicast;
1293         net->get_stats = pegasus_netdev_stats;
1294         SET_ETHTOOL_OPS(net, &ops);
1295         pegasus->mii.dev = net;
1296         pegasus->mii.mdio_read = mdio_read;
1297         pegasus->mii.mdio_write = mdio_write;
1298         pegasus->mii.phy_id_mask = 0x1f;
1299         pegasus->mii.reg_num_mask = 0x1f;
1300         spin_lock_init(&pegasus->rx_pool_lock);
1301         pegasus->msg_enable = netif_msg_init (msg_level, NETIF_MSG_DRV
1302                                 | NETIF_MSG_PROBE | NETIF_MSG_LINK);
1303
1304         pegasus->features = usb_dev_id[dev_index].private;
1305         get_interrupt_interval(pegasus);
1306         if (reset_mac(pegasus)) {
1307                 dev_err(&intf->dev, "can't reset MAC\n");
1308                 res = -EIO;
1309                 goto out2;
1310         }
1311         set_ethernet_addr(pegasus);
1312         fill_skb_pool(pegasus);
1313         if (pegasus->features & PEGASUS_II) {
1314                 dev_info(&intf->dev, "setup Pegasus II specific registers\n");
1315                 setup_pegasus_II(pegasus);
1316         }
1317         pegasus->phy = mii_phy_probe(pegasus);
1318         if (pegasus->phy == 0xff) {
1319                 dev_warn(&intf->dev, "can't locate MII phy, using default\n");
1320                 pegasus->phy = 1;
1321         }
1322         pegasus->mii.phy_id = pegasus->phy;
1323         usb_set_intfdata(intf, pegasus);
1324         SET_NETDEV_DEV(net, &intf->dev);
1325         pegasus_reset_wol(net);
1326         res = register_netdev(net);
1327         if (res)
1328                 goto out3;
1329         queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1330                                 CARRIER_CHECK_DELAY);
1331
1332         dev_info(&intf->dev, "%s, %s, %02x:%02x:%02x:%02x:%02x:%02x\n",
1333                 net->name,
1334                 usb_dev_id[dev_index].name,
1335                 net->dev_addr [0], net->dev_addr [1],
1336                 net->dev_addr [2], net->dev_addr [3],
1337                 net->dev_addr [4], net->dev_addr [5]);
1338         return 0;
1339
1340 out3:
1341         usb_set_intfdata(intf, NULL);
1342         free_skb_pool(pegasus);
1343 out2:
1344         free_all_urbs(pegasus);
1345 out1:
1346         free_netdev(net);
1347 out:
1348         usb_put_dev(dev);
1349         return res;
1350 }
1351
1352 static void pegasus_disconnect(struct usb_interface *intf)
1353 {
1354         struct pegasus *pegasus = usb_get_intfdata(intf);
1355
1356         usb_set_intfdata(intf, NULL);
1357         if (!pegasus) {
1358                 dev_dbg(&intf->dev, "unregistering non-bound device?\n");
1359                 return;
1360         }
1361
1362         pegasus->flags |= PEGASUS_UNPLUG;
1363         cancel_delayed_work(&pegasus->carrier_check);
1364         unregister_netdev(pegasus->net);
1365         usb_put_dev(interface_to_usbdev(intf));
1366         unlink_all_urbs(pegasus);
1367         free_all_urbs(pegasus);
1368         free_skb_pool(pegasus);
1369         if (pegasus->rx_skb)
1370                 dev_kfree_skb(pegasus->rx_skb);
1371         free_netdev(pegasus->net);
1372 }
1373
1374 static int pegasus_suspend (struct usb_interface *intf, pm_message_t message)
1375 {
1376         struct pegasus *pegasus = usb_get_intfdata(intf);
1377
1378         netif_device_detach (pegasus->net);
1379         if (netif_running(pegasus->net)) {
1380                 cancel_delayed_work(&pegasus->carrier_check);
1381
1382                 usb_kill_urb(pegasus->rx_urb);
1383                 usb_kill_urb(pegasus->intr_urb);
1384         }
1385         return 0;
1386 }
1387
1388 static int pegasus_resume (struct usb_interface *intf)
1389 {
1390         struct pegasus *pegasus = usb_get_intfdata(intf);
1391
1392         netif_device_attach (pegasus->net);
1393         if (netif_running(pegasus->net)) {
1394                 pegasus->rx_urb->status = 0;
1395                 pegasus->rx_urb->actual_length = 0;
1396                 read_bulk_callback(pegasus->rx_urb, NULL);
1397
1398                 pegasus->intr_urb->status = 0;
1399                 pegasus->intr_urb->actual_length = 0;
1400                 intr_callback(pegasus->intr_urb, NULL);
1401
1402                 queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1403                                         CARRIER_CHECK_DELAY);
1404         }
1405         return 0;
1406 }
1407
1408 static struct usb_driver pegasus_driver = {
1409         .name = driver_name,
1410         .probe = pegasus_probe,
1411         .disconnect = pegasus_disconnect,
1412         .id_table = pegasus_ids,
1413         .suspend = pegasus_suspend,
1414         .resume = pegasus_resume,
1415 };
1416
1417 static int __init pegasus_init(void)
1418 {
1419         pr_info("%s: %s, " DRIVER_DESC "\n", driver_name, DRIVER_VERSION);
1420         pegasus_workqueue = create_singlethread_workqueue("pegasus");
1421         if (!pegasus_workqueue)
1422                 return -ENOMEM;
1423         return usb_register(&pegasus_driver);
1424 }
1425
1426 static void __exit pegasus_exit(void)
1427 {
1428         destroy_workqueue(pegasus_workqueue);
1429         usb_deregister(&pegasus_driver);
1430 }
1431
1432 module_init(pegasus_init);
1433 module_exit(pegasus_exit);