git.oblomov.eu Git - linux-2.6/blob - 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 #undef  DEBUG
  32
  33 #include <linux/sched.h>
  34 #include <linux/slab.h>
  35 #include <linux/init.h>
  36 #include <linux/delay.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/etherdevice.h>
  39 #include <linux/ethtool.h>
  40 #include <linux/mii.h>
  41 #include <linux/usb.h>
  42 #include <linux/module.h>
  43 #include <asm/byteorder.h>
  44 #include <asm/uaccess.h>
  45 #include "pegasus.h"
  46
  47 /*
  48  * Version Information
  49  */
  50 #define DRIVER_VERSION "v0.6.12 (2005/01/13)"
  51 #define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>"
  52 #define DRIVER_DESC "Pegasus/Pegasus II USB Ethernet driver"
  53
  54 static const char driver_name[] = "pegasus";
  55
  56 #undef  PEGASUS_WRITE_EEPROM
  57 #define BMSR_MEDIA      (BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | \
  58                         BMSR_100FULL | BMSR_ANEGCAPABLE)
  59
  60 static int loopback = 0;
  61 static int mii_mode = 0;
  62
  63 static struct usb_eth_dev usb_dev_id[] = {
  64 #define PEGASUS_DEV(pn, vid, pid, flags)        \
  65         {.name = pn, .vendor = vid, .device = pid, .private = flags},
  66 #include "pegasus.h"
  67 #undef  PEGASUS_DEV
  68         {NULL, 0, 0, 0}
  69 };
  70
  71 static struct usb_device_id pegasus_ids[] = {
  72 #define PEGASUS_DEV(pn, vid, pid, flags) \
  73         {.match_flags = USB_DEVICE_ID_MATCH_DEVICE, .idVendor = vid, .idProduct = pid},
  74 #include "pegasus.h"
  75 #undef  PEGASUS_DEV
  76         {}
  77 };
  78
  79 MODULE_AUTHOR(DRIVER_AUTHOR);
  80 MODULE_DESCRIPTION(DRIVER_DESC);
  81 MODULE_LICENSE("GPL");
  82 module_param(loopback, bool, 0);
  83 module_param(mii_mode, bool, 0);
  84 MODULE_PARM_DESC(loopback, "Enable MAC loopback mode (bit 0)");
  85 MODULE_PARM_DESC(mii_mode, "Enable HomePNA mode (bit 0),default=MII mode = 0");
  86
  87 /* use ethtool to change the level for any given device */
  88 static int msg_level = -1;
  89 module_param (msg_level, int, 0);
  90 MODULE_PARM_DESC (msg_level, "Override default message level");
  91
  92 MODULE_DEVICE_TABLE(usb, pegasus_ids);
  93
  94 static int update_eth_regs_async(pegasus_t *);
  95 /* Aargh!!! I _really_ hate such tweaks */
  96 static void ctrl_callback(struct urb *urb, struct pt_regs *regs)
  97 {
  98         pegasus_t *pegasus = urb->context;
  99
 100         if (!pegasus)
 101                 return;
 102
 103         switch (urb->status) {
 104         case 0:
 105                 if (pegasus->flags & ETH_REGS_CHANGE) {
 106                         pegasus->flags &= ~ETH_REGS_CHANGE;
 107                         pegasus->flags |= ETH_REGS_CHANGED;
 108                         update_eth_regs_async(pegasus);
 109                         return;
 110                 }
 111                 break;
 112         case -EINPROGRESS:
 113                 return;
 114         case -ENOENT:
 115                 break;
 116         default:
 117                 if (netif_msg_drv(pegasus))
 118                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 119                                 __FUNCTION__, urb->status);
 120         }
 121         pegasus->flags &= ~ETH_REGS_CHANGED;
 122         wake_up(&pegasus->ctrl_wait);
 123 }
 124
 125 static int get_registers(pegasus_t * pegasus, __u16 indx, __u16 size,
 126                          void *data)
 127 {
 128         int ret;
 129         char *buffer;
 130         DECLARE_WAITQUEUE(wait, current);
 131
 132         buffer = kmalloc(size, GFP_KERNEL);
 133         if (!buffer) {
 134                 if (netif_msg_drv(pegasus))
 135                         dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
 136                                         __FUNCTION__);
 137                 return -ENOMEM;
 138         }
 139         add_wait_queue(&pegasus->ctrl_wait, &wait);
 140         set_current_state(TASK_UNINTERRUPTIBLE);
 141         while (pegasus->flags & ETH_REGS_CHANGED)
 142                 schedule();
 143         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 144         set_current_state(TASK_RUNNING);
 145
 146         pegasus->dr.bRequestType = PEGASUS_REQT_READ;
 147         pegasus->dr.bRequest = PEGASUS_REQ_GET_REGS;
 148         pegasus->dr.wValue = cpu_to_le16(0);
 149         pegasus->dr.wIndex = cpu_to_le16p(&indx);
 150         pegasus->dr.wLength = cpu_to_le16p(&size);
 151         pegasus->ctrl_urb->transfer_buffer_length = size;
 152
 153         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 154                              usb_rcvctrlpipe(pegasus->usb, 0),
 155                              (char *) &pegasus->dr,
 156                              buffer, size, ctrl_callback, pegasus);
 157
 158         add_wait_queue(&pegasus->ctrl_wait, &wait);
 159         set_current_state(TASK_UNINTERRUPTIBLE);
 160
 161         /* using ATOMIC, we'd never wake up if we slept */
 162         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 163                 if (netif_msg_drv(pegasus))
 164                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 165                                         __FUNCTION__, ret);
 166                 goto out;
 167         }
 168
 169         schedule();
 170 out:
 171         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 172         memcpy(data, buffer, size);
 173         kfree(buffer);
 174
 175         return ret;
 176 }
 177
 178 static int set_registers(pegasus_t * pegasus, __u16 indx, __u16 size,
 179                          void *data)
 180 {
 181         int ret;
 182         char *buffer;
 183         DECLARE_WAITQUEUE(wait, current);
 184
 185         buffer = kmalloc(size, GFP_KERNEL);
 186         if (!buffer) {
 187                 if (netif_msg_drv(pegasus))
 188                         dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
 189                                         __FUNCTION__);
 190                 return -ENOMEM;
 191         }
 192         memcpy(buffer, data, size);
 193
 194         add_wait_queue(&pegasus->ctrl_wait, &wait);
 195         set_current_state(TASK_UNINTERRUPTIBLE);
 196         while (pegasus->flags & ETH_REGS_CHANGED)
 197                 schedule();
 198         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 199         set_current_state(TASK_RUNNING);
 200
 201         pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
 202         pegasus->dr.bRequest = PEGASUS_REQ_SET_REGS;
 203         pegasus->dr.wValue = cpu_to_le16(0);
 204         pegasus->dr.wIndex = cpu_to_le16p(&indx);
 205         pegasus->dr.wLength = cpu_to_le16p(&size);
 206         pegasus->ctrl_urb->transfer_buffer_length = size;
 207
 208         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 209                              usb_sndctrlpipe(pegasus->usb, 0),
 210                              (char *) &pegasus->dr,
 211                              buffer, size, ctrl_callback, pegasus);
 212
 213         add_wait_queue(&pegasus->ctrl_wait, &wait);
 214         set_current_state(TASK_UNINTERRUPTIBLE);
 215
 216         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 217                 if (netif_msg_drv(pegasus))
 218                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 219                                         __FUNCTION__, ret);
 220                 goto out;
 221         }
 222
 223         schedule();
 224 out:
 225         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 226         kfree(buffer);
 227
 228         return ret;
 229 }
 230
 231 static int set_register(pegasus_t * pegasus, __u16 indx, __u8 data)
 232 {
 233         int ret;
 234         char *tmp;
 235         DECLARE_WAITQUEUE(wait, current);
 236
 237         tmp = kmalloc(1, GFP_KERNEL);
 238         if (!tmp) {
 239                 if (netif_msg_drv(pegasus))
 240                         dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
 241                                         __FUNCTION__);
 242                 return -ENOMEM;
 243         }
 244         memcpy(tmp, &data, 1);
 245         add_wait_queue(&pegasus->ctrl_wait, &wait);
 246         set_current_state(TASK_UNINTERRUPTIBLE);
 247         while (pegasus->flags & ETH_REGS_CHANGED)
 248                 schedule();
 249         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 250         set_current_state(TASK_RUNNING);
 251
 252         pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
 253         pegasus->dr.bRequest = PEGASUS_REQ_SET_REG;
 254         pegasus->dr.wValue = cpu_to_le16(data);
 255         pegasus->dr.wIndex = cpu_to_le16p(&indx);
 256         pegasus->dr.wLength = cpu_to_le16(1);
 257         pegasus->ctrl_urb->transfer_buffer_length = 1;
 258
 259         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 260                              usb_sndctrlpipe(pegasus->usb, 0),
 261                              (char *) &pegasus->dr,
 262                              &tmp, 1, ctrl_callback, pegasus);
 263
 264         add_wait_queue(&pegasus->ctrl_wait, &wait);
 265         set_current_state(TASK_UNINTERRUPTIBLE);
 266
 267         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 268                 if (netif_msg_drv(pegasus))
 269                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 270                                         __FUNCTION__, ret);
 271                 goto out;
 272         }
 273
 274         schedule();
 275 out:
 276         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 277         kfree(tmp);
 278
 279         return ret;
 280 }
 281
 282 static int update_eth_regs_async(pegasus_t * pegasus)
 283 {
 284         int ret;
 285
 286         pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
 287         pegasus->dr.bRequest = PEGASUS_REQ_SET_REGS;
 288         pegasus->dr.wValue = 0;
 289         pegasus->dr.wIndex = cpu_to_le16(EthCtrl0);
 290         pegasus->dr.wLength = cpu_to_le16(3);
 291         pegasus->ctrl_urb->transfer_buffer_length = 3;
 292
 293         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 294                              usb_sndctrlpipe(pegasus->usb, 0),
 295                              (char *) &pegasus->dr,
 296                              pegasus->eth_regs, 3, ctrl_callback, pegasus);
 297
 298         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC)))
 299                 if (netif_msg_drv(pegasus))
 300                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 301                                         __FUNCTION__, ret);
 302
 303         return ret;
 304 }
 305
 306 static int read_mii_word(pegasus_t * pegasus, __u8 phy, __u8 indx, __u16 * regd)
 307 {
 308         int i;
 309         __u8 data[4] = { phy, 0, 0, indx };
 310         __le16 regdi;
 311         int ret;
 312
 313         ret = set_register(pegasus, PhyCtrl, 0);
 314         ret = set_registers(pegasus, PhyAddr, sizeof (data), data);
 315         ret = set_register(pegasus, PhyCtrl, (indx | PHY_READ));
 316         for (i = 0; i < REG_TIMEOUT; i++) {
 317                 ret = get_registers(pegasus, PhyCtrl, 1, data);
 318                 if (data[0] & PHY_DONE)
 319                         break;
 320         }
 321         if (i < REG_TIMEOUT) {
 322                 ret = get_registers(pegasus, PhyData, 2, &regdi);
 323                 *regd = le16_to_cpu(regdi);
 324                 return 1;
 325         }
 326         if (netif_msg_drv(pegasus))
 327                 dev_warn(&pegasus->intf->dev, "fail %s\n", __FUNCTION__);
 328
 329         return 0;
 330 }
 331
 332 static int mdio_read(struct net_device *dev, int phy_id, int loc)
 333 {
 334         pegasus_t *pegasus = (pegasus_t *) netdev_priv(dev);
 335         u16 res;
 336
 337         read_mii_word(pegasus, phy_id, loc, &res);
 338         return (int)res;
 339 }
 340
 341 static int write_mii_word(pegasus_t * pegasus, __u8 phy, __u8 indx, __u16 regd)
 342 {
 343         int i;
 344         __u8 data[4] = { phy, 0, 0, indx };
 345         int ret;
 346
 347         data[1] = (u8) regd;
 348         data[2] = (u8) (regd >> 8);
 349         ret = set_register(pegasus, PhyCtrl, 0);
 350         ret = set_registers(pegasus, PhyAddr, sizeof(data), data);
 351         ret = set_register(pegasus, PhyCtrl, (indx | PHY_WRITE));
 352         for (i = 0; i < REG_TIMEOUT; i++) {
 353                 ret = get_registers(pegasus, PhyCtrl, 1, data);
 354                 if (data[0] & PHY_DONE)
 355                         break;
 356         }
 357         if (i < REG_TIMEOUT)
 358                 return 0;
 359
 360         if (netif_msg_drv(pegasus))
 361                 dev_warn(&pegasus->intf->dev, "fail %s\n", __FUNCTION__);
 362         return 1;
 363 }
 364
 365 static void mdio_write(struct net_device *dev, int phy_id, int loc, int val)
 366 {
 367         pegasus_t *pegasus = (pegasus_t *) netdev_priv(dev);
 368
 369         write_mii_word(pegasus, phy_id, loc, val);
 370 }
 371
 372 static int read_eprom_word(pegasus_t * pegasus, __u8 index, __u16 * retdata)
 373 {
 374         int i;
 375         __u8 tmp;
 376         __le16 retdatai;
 377         int ret;
 378
 379         ret = set_register(pegasus, EpromCtrl, 0);
 380         ret = set_register(pegasus, EpromOffset, index);
 381         ret = set_register(pegasus, EpromCtrl, EPROM_READ);
 382
 383         for (i = 0; i < REG_TIMEOUT; i++) {
 384                 ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
 385                 if (tmp & EPROM_DONE)
 386                         break;
 387         }
 388         if (i < REG_TIMEOUT) {
 389                 ret = get_registers(pegasus, EpromData, 2, &retdatai);
 390                 *retdata = le16_to_cpu(retdatai);
 391                 return 0;
 392         }
 393
 394         if (netif_msg_drv(pegasus))
 395                 dev_warn(&pegasus->intf->dev, "fail %s\n", __FUNCTION__);
 396         return -1;
 397 }
 398
 399 #ifdef  PEGASUS_WRITE_EEPROM
 400 static inline void enable_eprom_write(pegasus_t * pegasus)
 401 {
 402         __u8 tmp;
 403         int ret;
 404
 405         ret = get_registers(pegasus, EthCtrl2, 1, &tmp);
 406         ret = set_register(pegasus, EthCtrl2, tmp | EPROM_WR_ENABLE);
 407 }
 408
 409 static inline void disable_eprom_write(pegasus_t * pegasus)
 410 {
 411         __u8 tmp;
 412         int ret;
 413
 414         ret = get_registers(pegasus, EthCtrl2, 1, &tmp);
 415         ret = set_register(pegasus, EpromCtrl, 0);
 416         ret = set_register(pegasus, EthCtrl2, tmp & ~EPROM_WR_ENABLE);
 417 }
 418
 419 static int write_eprom_word(pegasus_t * pegasus, __u8 index, __u16 data)
 420 {
 421         int i;
 422         __u8 tmp, d[4] = { 0x3f, 0, 0, EPROM_WRITE };
 423         int ret;
 424
 425         ret = set_registers(pegasus, EpromOffset, 4, d);
 426         enable_eprom_write(pegasus);
 427         ret = set_register(pegasus, EpromOffset, index);
 428         ret = set_registers(pegasus, EpromData, 2, &data);
 429         ret = set_register(pegasus, EpromCtrl, EPROM_WRITE);
 430
 431         for (i = 0; i < REG_TIMEOUT; i++) {
 432                 ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
 433                 if (tmp & EPROM_DONE)
 434                         break;
 435         }
 436         disable_eprom_write(pegasus);
 437         if (i < REG_TIMEOUT)
 438                 return 0;
 439         if (netif_msg_drv(pegasus))
 440                 dev_warn(&pegasus->intf->dev, "fail %s\n", __FUNCTION__);
 441         return -1;
 442 }
 443 #endif                          /* PEGASUS_WRITE_EEPROM */
 444
 445 static inline void get_node_id(pegasus_t * pegasus, __u8 * id)
 446 {
 447         int i;
 448         __u16 w16;
 449
 450         for (i = 0; i < 3; i++) {
 451                 read_eprom_word(pegasus, i, &w16);
 452                 ((__le16 *) id)[i] = cpu_to_le16p(&w16);
 453         }
 454 }
 455
 456 static void set_ethernet_addr(pegasus_t * pegasus)
 457 {
 458         __u8 node_id[6];
 459         int ret;
 460
 461         get_node_id(pegasus, node_id);
 462         ret = set_registers(pegasus, EthID, sizeof (node_id), node_id);
 463         memcpy(pegasus->net->dev_addr, node_id, sizeof (node_id));
 464 }
 465
 466 static inline int reset_mac(pegasus_t * pegasus)
 467 {
 468         __u8 data = 0x8;
 469         int i;
 470         int ret;
 471
 472         ret = set_register(pegasus, EthCtrl1, data);
 473         for (i = 0; i < REG_TIMEOUT; i++) {
 474                 ret = get_registers(pegasus, EthCtrl1, 1, &data);
 475                 if (~data & 0x08) {
 476                         if (loopback & 1)
 477                                 break;
 478                         if (mii_mode && (pegasus->features & HAS_HOME_PNA))
 479                                 ret = set_register(pegasus, Gpio1, 0x34);
 480                         else
 481                                 ret = set_register(pegasus, Gpio1, 0x26);
 482                         ret = set_register(pegasus, Gpio0, pegasus->features);
 483                         ret = set_register(pegasus, Gpio0, DEFAULT_GPIO_SET);
 484                         break;
 485                 }
 486         }
 487         if (i == REG_TIMEOUT)
 488                 return 1;
 489
 490         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
 491             usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
 492                 ret = set_register(pegasus, Gpio0, 0x24);
 493                 ret = set_register(pegasus, Gpio0, 0x26);
 494         }
 495         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_ELCON) {
 496                 __u16 auxmode;
 497                 read_mii_word(pegasus, 3, 0x1b, &auxmode);
 498                 write_mii_word(pegasus, 3, 0x1b, auxmode | 4);
 499         }
 500
 501         return 0;
 502 }
 503
 504 static int enable_net_traffic(struct net_device *dev, struct usb_device *usb)
 505 {
 506         __u16 linkpart;
 507         __u8 data[4];
 508         pegasus_t *pegasus = netdev_priv(dev);
 509         int ret;
 510
 511         read_mii_word(pegasus, pegasus->phy, MII_LPA, &linkpart);
 512         data[0] = 0xc9;
 513         data[1] = 0;
 514         if (linkpart & (ADVERTISE_100FULL | ADVERTISE_10FULL))
 515                 data[1] |= 0x20;        /* set full duplex */
 516         if (linkpart & (ADVERTISE_100FULL | ADVERTISE_100HALF))
 517                 data[1] |= 0x10;        /* set 100 Mbps */
 518         if (mii_mode)
 519                 data[1] = 0;
 520         data[2] = (loopback & 1) ? 0x09 : 0x01;
 521
 522         memcpy(pegasus->eth_regs, data, sizeof (data));
 523         ret = set_registers(pegasus, EthCtrl0, 3, data);
 524
 525         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
 526             usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
 527                 u16 auxmode;
 528                 read_mii_word(pegasus, 0, 0x1b, &auxmode);
 529                 write_mii_word(pegasus, 0, 0x1b, auxmode | 4);
 530         }
 531
 532         return 0;
 533 }
 534
 535 static void fill_skb_pool(pegasus_t * pegasus)
 536 {
 537         int i;
 538
 539         for (i = 0; i < RX_SKBS; i++) {
 540                 if (pegasus->rx_pool[i])
 541                         continue;
 542                 pegasus->rx_pool[i] = dev_alloc_skb(PEGASUS_MTU + 2);
 543                 /*
 544                  ** we give up if the allocation fail. the tasklet will be
 545                  ** rescheduled again anyway...
 546                  */
 547                 if (pegasus->rx_pool[i] == NULL)
 548                         return;
 549                 pegasus->rx_pool[i]->dev = pegasus->net;
 550                 skb_reserve(pegasus->rx_pool[i], 2);
 551         }
 552 }
 553
 554 static void free_skb_pool(pegasus_t * pegasus)
 555 {
 556         int i;
 557
 558         for (i = 0; i < RX_SKBS; i++) {
 559                 if (pegasus->rx_pool[i]) {
 560                         dev_kfree_skb(pegasus->rx_pool[i]);
 561                         pegasus->rx_pool[i] = NULL;
 562                 }
 563         }
 564 }
 565
 566 static inline struct sk_buff *pull_skb(pegasus_t * pegasus)
 567 {
 568         int i;
 569         struct sk_buff *skb;
 570
 571         for (i = 0; i < RX_SKBS; i++) {
 572                 if (likely(pegasus->rx_pool[i] != NULL)) {
 573                         skb = pegasus->rx_pool[i];
 574                         pegasus->rx_pool[i] = NULL;
 575                         return skb;
 576                 }
 577         }
 578         return NULL;
 579 }
 580
 581 static void read_bulk_callback(struct urb *urb, struct pt_regs *regs)
 582 {
 583         pegasus_t *pegasus = urb->context;
 584         struct net_device *net;
 585         int rx_status, count = urb->actual_length;
 586         u8 *buf = urb->transfer_buffer;
 587         __u16 pkt_len;
 588
 589         if (!pegasus)
 590                 return;
 591
 592         net = pegasus->net;
 593         if (!netif_device_present(net) || !netif_running(net))
 594                 return;
 595
 596         switch (urb->status) {
 597         case 0:
 598                 break;
 599         case -ETIMEDOUT:
 600                 if (netif_msg_rx_err(pegasus))
 601                         pr_debug("%s: reset MAC\n", net->name);
 602                 pegasus->flags &= ~PEGASUS_RX_BUSY;
 603                 break;
 604         case -EPIPE:            /* stall, or disconnect from TT */
 605                 /* FIXME schedule work to clear the halt */
 606                 if (netif_msg_rx_err(pegasus))
 607                         printk(KERN_WARNING "%s: no rx stall recovery\n",
 608                                         net->name);
 609                 return;
 610         case -ENOENT:
 611         case -ECONNRESET:
 612         case -ESHUTDOWN:
 613                 if (netif_msg_ifdown(pegasus))
 614                         pr_debug("%s: rx unlink, %d\n", net->name, urb->status);
 615                 return;
 616         default:
 617                 if (netif_msg_rx_err(pegasus))
 618                         pr_debug("%s: RX status %d\n", net->name, urb->status);
 619                 goto goon;
 620         }
 621
 622         if (!count || count < 4)
 623                 goto goon;
 624
 625         rx_status = buf[count - 2];
 626         if (rx_status & 0x1e) {
 627                 if (netif_msg_rx_err(pegasus))
 628                         pr_debug("%s: RX packet error %x\n",
 629                                         net->name, rx_status);
 630                 pegasus->stats.rx_errors++;
 631                 if (rx_status & 0x06)   // long or runt
 632                         pegasus->stats.rx_length_errors++;
 633                 if (rx_status & 0x08)
 634                         pegasus->stats.rx_crc_errors++;
 635                 if (rx_status & 0x10)   // extra bits
 636                         pegasus->stats.rx_frame_errors++;
 637                 goto goon;
 638         }
 639         if (pegasus->chip == 0x8513) {
 640                 pkt_len = le32_to_cpu(*(__le32 *)urb->transfer_buffer);
 641                 pkt_len &= 0x0fff;
 642                 pegasus->rx_skb->data += 2;
 643         } else {
 644                 pkt_len = buf[count - 3] << 8;
 645                 pkt_len += buf[count - 4];
 646                 pkt_len &= 0xfff;
 647                 pkt_len -= 8;
 648         }
 649
 650         /*
 651          * If the packet is unreasonably long, quietly drop it rather than
 652          * kernel panicing by calling skb_put.
 653          */
 654         if (pkt_len > PEGASUS_MTU)
 655                 goto goon;
 656
 657         /*
 658          * at this point we are sure pegasus->rx_skb != NULL
 659          * so we go ahead and pass up the packet.
 660          */
 661         skb_put(pegasus->rx_skb, pkt_len);
 662         pegasus->rx_skb->protocol = eth_type_trans(pegasus->rx_skb, net);
 663         netif_rx(pegasus->rx_skb);
 664         pegasus->stats.rx_packets++;
 665         pegasus->stats.rx_bytes += pkt_len;
 666
 667         if (pegasus->flags & PEGASUS_UNPLUG)
 668                 return;
 669
 670         spin_lock(&pegasus->rx_pool_lock);
 671         pegasus->rx_skb = pull_skb(pegasus);
 672         spin_unlock(&pegasus->rx_pool_lock);
 673
 674         if (pegasus->rx_skb == NULL)
 675                 goto tl_sched;
 676 goon:
 677         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
 678                           usb_rcvbulkpipe(pegasus->usb, 1),
 679                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
 680                           read_bulk_callback, pegasus);
 681         if (usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC)) {
 682                 pegasus->flags |= PEGASUS_RX_URB_FAIL;
 683                 goto tl_sched;
 684         } else {
 685                 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
 686         }
 687
 688         return;
 689
 690 tl_sched:
 691         tasklet_schedule(&pegasus->rx_tl);
 692 }
 693
 694 static void rx_fixup(unsigned long data)
 695 {
 696         pegasus_t *pegasus;
 697         unsigned long flags;
 698
 699         pegasus = (pegasus_t *) data;
 700         if (pegasus->flags & PEGASUS_UNPLUG)
 701                 return;
 702
 703         spin_lock_irqsave(&pegasus->rx_pool_lock, flags);
 704         fill_skb_pool(pegasus);
 705         if (pegasus->flags & PEGASUS_RX_URB_FAIL)
 706                 if (pegasus->rx_skb)
 707                         goto try_again;
 708         if (pegasus->rx_skb == NULL) {
 709                 pegasus->rx_skb = pull_skb(pegasus);
 710         }
 711         if (pegasus->rx_skb == NULL) {
 712                 if (netif_msg_rx_err(pegasus))
 713                         printk(KERN_WARNING "%s: low on memory\n",
 714                                         pegasus->net->name);
 715                 tasklet_schedule(&pegasus->rx_tl);
 716                 goto done;
 717         }
 718         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
 719                           usb_rcvbulkpipe(pegasus->usb, 1),
 720                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
 721                           read_bulk_callback, pegasus);
 722 try_again:
 723         if (usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC)) {
 724                 pegasus->flags |= PEGASUS_RX_URB_FAIL;
 725                 tasklet_schedule(&pegasus->rx_tl);
 726         } else {
 727                 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
 728         }
 729 done:
 730         spin_unlock_irqrestore(&pegasus->rx_pool_lock, flags);
 731 }
 732
 733 static void write_bulk_callback(struct urb *urb, struct pt_regs *regs)
 734 {
 735         pegasus_t *pegasus = urb->context;
 736         struct net_device *net = pegasus->net;
 737
 738         if (!pegasus)
 739                 return;
 740
 741         if (!netif_device_present(net) || !netif_running(net))
 742                 return;
 743
 744         switch (urb->status) {
 745         case -EPIPE:
 746                 /* FIXME schedule_work() to clear the tx halt */
 747                 netif_stop_queue(net);
 748                 if (netif_msg_tx_err(pegasus))
 749                         printk(KERN_WARNING "%s: no tx stall recovery\n",
 750                                         net->name);
 751                 return;
 752         case -ENOENT:
 753         case -ECONNRESET:
 754         case -ESHUTDOWN:
 755                 if (netif_msg_ifdown(pegasus))
 756                         pr_debug("%s: tx unlink, %d\n", net->name, urb->status);
 757                 return;
 758         default:
 759                 if (netif_msg_tx_err(pegasus))
 760                         pr_info("%s: TX status %d\n", net->name, urb->status);
 761                 /* FALL THROUGH */
 762         case 0:
 763                 break;
 764         }
 765
 766         net->trans_start = jiffies;
 767         netif_wake_queue(net);
 768 }
 769
 770 static void intr_callback(struct urb *urb, struct pt_regs *regs)
 771 {
 772         pegasus_t *pegasus = urb->context;
 773         struct net_device *net;
 774         int status;
 775
 776         if (!pegasus)
 777                 return;
 778         net = pegasus->net;
 779
 780         switch (urb->status) {
 781         case 0:
 782                 break;
 783         case -ECONNRESET:       /* unlink */
 784         case -ENOENT:
 785         case -ESHUTDOWN:
 786                 return;
 787         default:
 788                 /* some Pegasus-I products report LOTS of data
 789                  * toggle errors... avoid log spamming
 790                  */
 791                 if (netif_msg_timer(pegasus))
 792                         pr_debug("%s: intr status %d\n", net->name,
 793                                         urb->status);
 794         }
 795
 796         if (urb->actual_length >= 6) {
 797                 u8      * d = urb->transfer_buffer;
 798
 799                 /* byte 0 == tx_status1, reg 2B */
 800                 if (d[0] & (TX_UNDERRUN|EXCESSIVE_COL
 801                                         |LATE_COL|JABBER_TIMEOUT)) {
 802                         pegasus->stats.tx_errors++;
 803                         if (d[0] & TX_UNDERRUN)
 804                                 pegasus->stats.tx_fifo_errors++;
 805                         if (d[0] & (EXCESSIVE_COL | JABBER_TIMEOUT))
 806                                 pegasus->stats.tx_aborted_errors++;
 807                         if (d[0] & LATE_COL)
 808                                 pegasus->stats.tx_window_errors++;
 809                 }
 810
 811                 /* d[5].LINK_STATUS lies on some adapters.
 812                  * d[0].NO_CARRIER kicks in only with failed TX.
 813                  * ... so monitoring with MII may be safest.
 814                  */
 815                 if (d[0] & NO_CARRIER)
 816                         netif_carrier_off(net);
 817                 else
 818                         netif_carrier_on(net);
 819
 820                 /* bytes 3-4 == rx_lostpkt, reg 2E/2F */
 821                 pegasus->stats.rx_missed_errors += ((d[3] & 0x7f) << 8) | d[4];
 822         }
 823
 824         status = usb_submit_urb(urb, SLAB_ATOMIC);
 825         if (status && netif_msg_timer(pegasus))
 826                 printk(KERN_ERR "%s: can't resubmit interrupt urb, %d\n",
 827                                 net->name, status);
 828 }
 829
 830 static void pegasus_tx_timeout(struct net_device *net)
 831 {
 832         pegasus_t *pegasus = netdev_priv(net);
 833         if (netif_msg_timer(pegasus))
 834                 printk(KERN_WARNING "%s: tx timeout\n", net->name);
 835         usb_unlink_urb(pegasus->tx_urb);
 836         pegasus->stats.tx_errors++;
 837 }
 838
 839 static int pegasus_start_xmit(struct sk_buff *skb, struct net_device *net)
 840 {
 841         pegasus_t *pegasus = netdev_priv(net);
 842         int count = ((skb->len + 2) & 0x3f) ? skb->len + 2 : skb->len + 3;
 843         int res;
 844         __u16 l16 = skb->len;
 845
 846         netif_stop_queue(net);
 847
 848         ((__le16 *) pegasus->tx_buff)[0] = cpu_to_le16(l16);
 849         memcpy(pegasus->tx_buff + 2, skb->data, skb->len);
 850         usb_fill_bulk_urb(pegasus->tx_urb, pegasus->usb,
 851                           usb_sndbulkpipe(pegasus->usb, 2),
 852                           pegasus->tx_buff, count,
 853                           write_bulk_callback, pegasus);
 854         if ((res = usb_submit_urb(pegasus->tx_urb, GFP_ATOMIC))) {
 855                 if (netif_msg_tx_err(pegasus))
 856                         printk(KERN_WARNING "%s: fail tx, %d\n",
 857                                         net->name, res);
 858                 switch (res) {
 859                 case -EPIPE:            /* stall, or disconnect from TT */
 860                         /* cleanup should already have been scheduled */
 861                         break;
 862                 case -ENODEV:           /* disconnect() upcoming */
 863                         break;
 864                 default:
 865                         pegasus->stats.tx_errors++;
 866                         netif_start_queue(net);
 867                 }
 868         } else {
 869                 pegasus->stats.tx_packets++;
 870                 pegasus->stats.tx_bytes += skb->len;
 871                 net->trans_start = jiffies;
 872         }
 873         dev_kfree_skb(skb);
 874
 875         return 0;
 876 }
 877
 878 static struct net_device_stats *pegasus_netdev_stats(struct net_device *dev)
 879 {
 880         return &((pegasus_t *) netdev_priv(dev))->stats;
 881 }
 882
 883 static inline void disable_net_traffic(pegasus_t * pegasus)
 884 {
 885         int tmp = 0;
 886         int ret;
 887
 888         ret = set_registers(pegasus, EthCtrl0, 2, &tmp);
 889 }
 890
 891 static inline void get_interrupt_interval(pegasus_t * pegasus)
 892 {
 893         __u8 data[2];
 894
 895         read_eprom_word(pegasus, 4, (__u16 *) data);
 896         if (pegasus->usb->speed != USB_SPEED_HIGH) {
 897                 if (data[1] < 0x80) {
 898                         if (netif_msg_timer(pegasus))
 899                                 dev_info(&pegasus->intf->dev, "intr interval "
 900                                         "changed from %ums to %ums\n",
 901                                         data[1], 0x80);
 902                         data[1] = 0x80;
 903 #ifdef PEGASUS_WRITE_EEPROM
 904                         write_eprom_word(pegasus, 4, *(__u16 *) data);
 905 #endif
 906                 }
 907         }
 908         pegasus->intr_interval = data[1];
 909 }
 910
 911 static void set_carrier(struct net_device *net)
 912 {
 913         pegasus_t *pegasus = netdev_priv(net);
 914         u16 tmp;
 915
 916         if (!read_mii_word(pegasus, pegasus->phy, MII_BMSR, &tmp))
 917                 return;
 918
 919         if (tmp & BMSR_LSTATUS)
 920                 netif_carrier_on(net);
 921         else
 922                 netif_carrier_off(net);
 923 }
 924
 925 static void free_all_urbs(pegasus_t * pegasus)
 926 {
 927         usb_free_urb(pegasus->intr_urb);
 928         usb_free_urb(pegasus->tx_urb);
 929         usb_free_urb(pegasus->rx_urb);
 930         usb_free_urb(pegasus->ctrl_urb);
 931 }
 932
 933 static void unlink_all_urbs(pegasus_t * pegasus)
 934 {
 935         usb_kill_urb(pegasus->intr_urb);
 936         usb_kill_urb(pegasus->tx_urb);
 937         usb_kill_urb(pegasus->rx_urb);
 938         usb_kill_urb(pegasus->ctrl_urb);
 939 }
 940
 941 static int alloc_urbs(pegasus_t * pegasus)
 942 {
 943         pegasus->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
 944         if (!pegasus->ctrl_urb) {
 945                 return 0;
 946         }
 947         pegasus->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 948         if (!pegasus->rx_urb) {
 949                 usb_free_urb(pegasus->ctrl_urb);
 950                 return 0;
 951         }
 952         pegasus->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 953         if (!pegasus->tx_urb) {
 954                 usb_free_urb(pegasus->rx_urb);
 955                 usb_free_urb(pegasus->ctrl_urb);
 956                 return 0;
 957         }
 958         pegasus->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
 959         if (!pegasus->intr_urb) {
 960                 usb_free_urb(pegasus->tx_urb);
 961                 usb_free_urb(pegasus->rx_urb);
 962                 usb_free_urb(pegasus->ctrl_urb);
 963                 return 0;
 964         }
 965
 966         return 1;
 967 }
 968
 969 static int pegasus_open(struct net_device *net)
 970 {
 971         pegasus_t *pegasus = netdev_priv(net);
 972         int res;
 973
 974         if (pegasus->rx_skb == NULL)
 975                 pegasus->rx_skb = pull_skb(pegasus);
 976         /*
 977          ** Note: no point to free the pool.  it is empty :-)
 978          */
 979         if (!pegasus->rx_skb)
 980                 return -ENOMEM;
 981
 982         res = set_registers(pegasus, EthID, 6, net->dev_addr);
 983
 984         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
 985                           usb_rcvbulkpipe(pegasus->usb, 1),
 986                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
 987                           read_bulk_callback, pegasus);
 988         if ((res = usb_submit_urb(pegasus->rx_urb, GFP_KERNEL))) {
 989                 if (netif_msg_ifup(pegasus))
 990                         pr_debug("%s: failed rx_urb, %d", net->name, res);
 991                 goto exit;
 992         }
 993
 994         usb_fill_int_urb(pegasus->intr_urb, pegasus->usb,
 995                          usb_rcvintpipe(pegasus->usb, 3),
 996                          pegasus->intr_buff, sizeof (pegasus->intr_buff),
 997                          intr_callback, pegasus, pegasus->intr_interval);
 998         if ((res = usb_submit_urb(pegasus->intr_urb, GFP_KERNEL))) {
 999                 if (netif_msg_ifup(pegasus))
1000                         pr_debug("%s: failed intr_urb, %d\n", net->name, res);
1001                 usb_kill_urb(pegasus->rx_urb);
1002                 goto exit;
1003         }
1004         if ((res = enable_net_traffic(net, pegasus->usb))) {
1005                 if (netif_msg_ifup(pegasus))
1006                         pr_debug("%s: can't enable_net_traffic() - %d\n",
1007                                         net->name, res);
1008                 res = -EIO;
1009                 usb_kill_urb(pegasus->rx_urb);
1010                 usb_kill_urb(pegasus->intr_urb);
1011                 free_skb_pool(pegasus);
1012                 goto exit;
1013         }
1014         set_carrier(net);
1015         netif_start_queue(net);
1016         if (netif_msg_ifup(pegasus))
1017                 pr_debug("%s: open\n", net->name);
1018         res = 0;
1019 exit:
1020         return res;
1021 }
1022
1023 static int pegasus_close(struct net_device *net)
1024 {
1025         pegasus_t *pegasus = netdev_priv(net);
1026
1027         netif_stop_queue(net);
1028         if (!(pegasus->flags & PEGASUS_UNPLUG))
1029                 disable_net_traffic(pegasus);
1030         tasklet_kill(&pegasus->rx_tl);
1031         unlink_all_urbs(pegasus);
1032
1033         return 0;
1034 }
1035
1036 static void pegasus_get_drvinfo(struct net_device *dev,
1037                                 struct ethtool_drvinfo *info)
1038 {
1039         pegasus_t *pegasus = netdev_priv(dev);
1040         strncpy(info->driver, driver_name, sizeof (info->driver) - 1);
1041         strncpy(info->version, DRIVER_VERSION, sizeof (info->version) - 1);
1042         usb_make_path(pegasus->usb, info->bus_info, sizeof (info->bus_info));
1043 }
1044
1045 /* also handles three patterns of some kind in hardware */
1046 #define WOL_SUPPORTED   (WAKE_MAGIC|WAKE_PHY)
1047
1048 static void
1049 pegasus_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1050 {
1051         pegasus_t       *pegasus = netdev_priv(dev);
1052
1053         wol->supported = WAKE_MAGIC | WAKE_PHY;
1054         wol->wolopts = pegasus->wolopts;
1055 }
1056
1057 static int
1058 pegasus_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1059 {
1060         pegasus_t       *pegasus = netdev_priv(dev);
1061         u8              reg78 = 0x04;
1062
1063         if (wol->wolopts & ~WOL_SUPPORTED)
1064                 return -EINVAL;
1065
1066         if (wol->wolopts & WAKE_MAGIC)
1067                 reg78 |= 0x80;
1068         if (wol->wolopts & WAKE_PHY)
1069                 reg78 |= 0x40;
1070         /* FIXME this 0x10 bit still needs to get set in the chip... */
1071         if (wol->wolopts)
1072                 pegasus->eth_regs[0] |= 0x10;
1073         else
1074                 pegasus->eth_regs[0] &= ~0x10;
1075         pegasus->wolopts = wol->wolopts;
1076         return set_register(pegasus, WakeupControl, reg78);
1077 }
1078
1079 static inline void pegasus_reset_wol(struct net_device *dev)
1080 {
1081         struct ethtool_wolinfo wol;
1082
1083         memset(&wol, 0, sizeof wol);
1084         (void) pegasus_set_wol(dev, &wol);
1085 }
1086
1087 static int
1088 pegasus_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1089 {
1090         pegasus_t *pegasus;
1091
1092         if (in_atomic())
1093                 return 0;
1094
1095         pegasus = netdev_priv(dev);
1096         mii_ethtool_gset(&pegasus->mii, ecmd);
1097
1098         return 0;
1099 }
1100
1101 static int
1102 pegasus_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1103 {
1104         pegasus_t *pegasus = netdev_priv(dev);
1105         return mii_ethtool_sset(&pegasus->mii, ecmd);
1106 }
1107
1108 static int pegasus_nway_reset(struct net_device *dev)
1109 {
1110         pegasus_t *pegasus = netdev_priv(dev);
1111         return mii_nway_restart(&pegasus->mii);
1112 }
1113
1114 static u32 pegasus_get_link(struct net_device *dev)
1115 {
1116         pegasus_t *pegasus = netdev_priv(dev);
1117         return mii_link_ok(&pegasus->mii);
1118 }
1119
1120 static u32 pegasus_get_msglevel(struct net_device *dev)
1121 {
1122         pegasus_t *pegasus = netdev_priv(dev);
1123         return pegasus->msg_enable;
1124 }
1125
1126 static void pegasus_set_msglevel(struct net_device *dev, u32 v)
1127 {
1128         pegasus_t *pegasus = netdev_priv(dev);
1129         pegasus->msg_enable = v;
1130 }
1131
1132 static struct ethtool_ops ops = {
1133         .get_drvinfo = pegasus_get_drvinfo,
1134         .get_settings = pegasus_get_settings,
1135         .set_settings = pegasus_set_settings,
1136         .nway_reset = pegasus_nway_reset,
1137         .get_link = pegasus_get_link,
1138         .get_msglevel = pegasus_get_msglevel,
1139         .set_msglevel = pegasus_set_msglevel,
1140         .get_wol = pegasus_get_wol,
1141         .set_wol = pegasus_set_wol,
1142 };
1143
1144 static int pegasus_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
1145 {
1146         __u16 *data = (__u16 *) & rq->ifr_ifru;
1147         pegasus_t *pegasus = netdev_priv(net);
1148         int res;
1149
1150         switch (cmd) {
1151         case SIOCDEVPRIVATE:
1152                 data[0] = pegasus->phy;
1153         case SIOCDEVPRIVATE + 1:
1154                 read_mii_word(pegasus, data[0], data[1] & 0x1f, &data[3]);
1155                 res = 0;
1156                 break;
1157         case SIOCDEVPRIVATE + 2:
1158                 if (!capable(CAP_NET_ADMIN))
1159                         return -EPERM;
1160                 write_mii_word(pegasus, pegasus->phy, data[1] & 0x1f, data[2]);
1161                 res = 0;
1162                 break;
1163         default:
1164                 res = -EOPNOTSUPP;
1165         }
1166         return res;
1167 }
1168
1169 static void pegasus_set_multicast(struct net_device *net)
1170 {
1171         pegasus_t *pegasus = netdev_priv(net);
1172
1173         if (net->flags & IFF_PROMISC) {
1174                 pegasus->eth_regs[EthCtrl2] |= RX_PROMISCUOUS;
1175                 if (netif_msg_link(pegasus))
1176                         pr_info("%s: Promiscuous mode enabled.\n", net->name);
1177         } else if (net->mc_count ||
1178                    (net->flags & IFF_ALLMULTI)) {
1179                 pegasus->eth_regs[EthCtrl0] |= RX_MULTICAST;
1180                 pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1181                 if (netif_msg_link(pegasus))
1182                         pr_info("%s: set allmulti\n", net->name);
1183         } else {
1184                 pegasus->eth_regs[EthCtrl0] &= ~RX_MULTICAST;
1185                 pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1186         }
1187
1188         pegasus->flags |= ETH_REGS_CHANGE;
1189         ctrl_callback(pegasus->ctrl_urb, NULL);
1190 }
1191
1192 static __u8 mii_phy_probe(pegasus_t * pegasus)
1193 {
1194         int i;
1195         __u16 tmp;
1196
1197         for (i = 0; i < 32; i++) {
1198                 read_mii_word(pegasus, i, MII_BMSR, &tmp);
1199                 if (tmp == 0 || tmp == 0xffff || (tmp & BMSR_MEDIA) == 0)
1200                         continue;
1201                 else
1202                         return i;
1203         }
1204
1205         return 0xff;
1206 }
1207
1208 static inline void setup_pegasus_II(pegasus_t * pegasus)
1209 {
1210         __u8 data = 0xa5;
1211         int ret;
1212
1213         ret = set_register(pegasus, Reg1d, 0);
1214         ret = set_register(pegasus, Reg7b, 1);
1215         mdelay(100);
1216         if ((pegasus->features & HAS_HOME_PNA) && mii_mode)
1217                 ret = set_register(pegasus, Reg7b, 0);
1218         else
1219                 ret = set_register(pegasus, Reg7b, 2);
1220
1221         ret = set_register(pegasus, 0x83, data);
1222         ret = get_registers(pegasus, 0x83, 1, &data);
1223
1224         if (data == 0xa5) {
1225                 pegasus->chip = 0x8513;
1226         } else {
1227                 pegasus->chip = 0;
1228         }
1229
1230         ret = set_register(pegasus, 0x80, 0xc0);
1231         ret = set_register(pegasus, 0x83, 0xff);
1232         ret = set_register(pegasus, 0x84, 0x01);
1233
1234         if (pegasus->features & HAS_HOME_PNA && mii_mode)
1235                 ret = set_register(pegasus, Reg81, 6);
1236         else
1237                 ret = set_register(pegasus, Reg81, 2);
1238 }
1239
1240
1241 static struct workqueue_struct *pegasus_workqueue = NULL;
1242 #define CARRIER_CHECK_DELAY (2 * HZ)
1243
1244 static void check_carrier(void *data)
1245 {
1246         pegasus_t *pegasus = data;
1247         set_carrier(pegasus->net);
1248         if (!(pegasus->flags & PEGASUS_UNPLUG)) {
1249                 queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1250                         CARRIER_CHECK_DELAY);
1251         }
1252 }
1253
1254 static int pegasus_probe(struct usb_interface *intf,
1255                          const struct usb_device_id *id)
1256 {
1257         struct usb_device *dev = interface_to_usbdev(intf);
1258         struct net_device *net;
1259         pegasus_t *pegasus;
1260         int dev_index = id - pegasus_ids;
1261         int res = -ENOMEM;
1262
1263         usb_get_dev(dev);
1264         net = alloc_etherdev(sizeof(struct pegasus));
1265         if (!net) {
1266                 dev_err(&intf->dev, "can't allocate %s\n", "device");
1267                 goto out;
1268         }
1269
1270         pegasus = netdev_priv(net);
1271         memset(pegasus, 0, sizeof (struct pegasus));
1272         pegasus->dev_index = dev_index;
1273         init_waitqueue_head(&pegasus->ctrl_wait);
1274
1275         if (!alloc_urbs(pegasus)) {
1276                 dev_err(&intf->dev, "can't allocate %s\n", "urbs");
1277                 goto out1;
1278         }
1279
1280         tasklet_init(&pegasus->rx_tl, rx_fixup, (unsigned long) pegasus);
1281
1282         INIT_WORK(&pegasus->carrier_check, check_carrier, pegasus);
1283
1284         pegasus->intf = intf;
1285         pegasus->usb = dev;
1286         pegasus->net = net;
1287         SET_MODULE_OWNER(net);
1288         net->open = pegasus_open;
1289         net->stop = pegasus_close;
1290         net->watchdog_timeo = PEGASUS_TX_TIMEOUT;
1291         net->tx_timeout = pegasus_tx_timeout;
1292         net->do_ioctl = pegasus_ioctl;
1293         net->hard_start_xmit = pegasus_start_xmit;
1294         net->set_multicast_list = pegasus_set_multicast;
1295         net->get_stats = pegasus_netdev_stats;
1296         SET_ETHTOOL_OPS(net, &ops);
1297         pegasus->mii.dev = net;
1298         pegasus->mii.mdio_read = mdio_read;
1299         pegasus->mii.mdio_write = mdio_write;
1300         pegasus->mii.phy_id_mask = 0x1f;
1301         pegasus->mii.reg_num_mask = 0x1f;
1302         spin_lock_init(&pegasus->rx_pool_lock);
1303         pegasus->msg_enable = netif_msg_init (msg_level, NETIF_MSG_DRV
1304                                 | NETIF_MSG_PROBE | NETIF_MSG_LINK);
1305
1306         pegasus->features = usb_dev_id[dev_index].private;
1307         get_interrupt_interval(pegasus);
1308         if (reset_mac(pegasus)) {
1309                 dev_err(&intf->dev, "can't reset MAC\n");
1310                 res = -EIO;
1311                 goto out2;
1312         }
1313         set_ethernet_addr(pegasus);
1314         fill_skb_pool(pegasus);
1315         if (pegasus->features & PEGASUS_II) {
1316                 dev_info(&intf->dev, "setup Pegasus II specific registers\n");
1317                 setup_pegasus_II(pegasus);
1318         }
1319         pegasus->phy = mii_phy_probe(pegasus);
1320         if (pegasus->phy == 0xff) {
1321                 dev_warn(&intf->dev, "can't locate MII phy, using default\n");
1322                 pegasus->phy = 1;
1323         }
1324         pegasus->mii.phy_id = pegasus->phy;
1325         usb_set_intfdata(intf, pegasus);
1326         SET_NETDEV_DEV(net, &intf->dev);
1327         pegasus_reset_wol(net);
1328         res = register_netdev(net);
1329         if (res)
1330                 goto out3;
1331         queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1332                                 CARRIER_CHECK_DELAY);
1333
1334         dev_info(&intf->dev, "%s, %s, %02x:%02x:%02x:%02x:%02x:%02x\n",
1335                 net->name,
1336                 usb_dev_id[dev_index].name,
1337                 net->dev_addr [0], net->dev_addr [1],
1338                 net->dev_addr [2], net->dev_addr [3],
1339                 net->dev_addr [4], net->dev_addr [5]);
1340         return 0;
1341
1342 out3:
1343         usb_set_intfdata(intf, NULL);
1344         free_skb_pool(pegasus);
1345 out2:
1346         free_all_urbs(pegasus);
1347 out1:
1348         free_netdev(net);
1349 out:
1350         usb_put_dev(dev);
1351         return res;
1352 }
1353
1354 static void pegasus_disconnect(struct usb_interface *intf)
1355 {
1356         struct pegasus *pegasus = usb_get_intfdata(intf);
1357
1358         usb_set_intfdata(intf, NULL);
1359         if (!pegasus) {
1360                 dev_dbg(&intf->dev, "unregistering non-bound device?\n");
1361                 return;
1362         }
1363
1364         pegasus->flags |= PEGASUS_UNPLUG;
1365         cancel_delayed_work(&pegasus->carrier_check);
1366         unregister_netdev(pegasus->net);
1367         usb_put_dev(interface_to_usbdev(intf));
1368         unlink_all_urbs(pegasus);
1369         free_all_urbs(pegasus);
1370         free_skb_pool(pegasus);
1371         if (pegasus->rx_skb)
1372                 dev_kfree_skb(pegasus->rx_skb);
1373         free_netdev(pegasus->net);
1374 }
1375
1376 static int pegasus_suspend (struct usb_interface *intf, pm_message_t message)
1377 {
1378         struct pegasus *pegasus = usb_get_intfdata(intf);
1379
1380         netif_device_detach (pegasus->net);
1381         if (netif_running(pegasus->net)) {
1382                 cancel_delayed_work(&pegasus->carrier_check);
1383
1384                 usb_kill_urb(pegasus->rx_urb);
1385                 usb_kill_urb(pegasus->intr_urb);
1386         }
1387         intf->dev.power.power_state = PMSG_SUSPEND;
1388         return 0;
1389 }
1390
1391 static int pegasus_resume (struct usb_interface *intf)
1392 {
1393         struct pegasus *pegasus = usb_get_intfdata(intf);
1394
1395         intf->dev.power.power_state = PMSG_ON;
1396         netif_device_attach (pegasus->net);
1397         if (netif_running(pegasus->net)) {
1398                 pegasus->rx_urb->status = 0;
1399                 pegasus->rx_urb->actual_length = 0;
1400                 read_bulk_callback(pegasus->rx_urb, NULL);
1401
1402                 pegasus->intr_urb->status = 0;
1403                 pegasus->intr_urb->actual_length = 0;
1404                 intr_callback(pegasus->intr_urb, NULL);
1405
1406                 queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1407                                         CARRIER_CHECK_DELAY);
1408         }
1409         return 0;
1410 }
1411
1412 static struct usb_driver pegasus_driver = {
1413         .name = driver_name,
1414         .probe = pegasus_probe,
1415         .disconnect = pegasus_disconnect,
1416         .id_table = pegasus_ids,
1417         .suspend = pegasus_suspend,
1418         .resume = pegasus_resume,
1419 };
1420
1421 static int __init pegasus_init(void)
1422 {
1423         pr_info("%s: %s, " DRIVER_DESC "\n", driver_name, DRIVER_VERSION);
1424         pegasus_workqueue = create_singlethread_workqueue("pegasus");
1425         if (!pegasus_workqueue)
1426                 return -ENOMEM;
1427         return usb_register(&pegasus_driver);
1428 }
1429
1430 static void __exit pegasus_exit(void)
1431 {
1432         destroy_workqueue(pegasus_workqueue);
1433         usb_deregister(&pegasus_driver);
1434 }
1435
1436 module_init(pegasus_init);
1437 module_exit(pegasus_exit);