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          * at this point we are sure pegasus->rx_skb != NULL
 652          * so we go ahead and pass up the packet.
 653          */
 654         skb_put(pegasus->rx_skb, pkt_len);
 655         pegasus->rx_skb->protocol = eth_type_trans(pegasus->rx_skb, net);
 656         netif_rx(pegasus->rx_skb);
 657         pegasus->stats.rx_packets++;
 658         pegasus->stats.rx_bytes += pkt_len;
 659
 660         if (pegasus->flags & PEGASUS_UNPLUG)
 661                 return;
 662
 663         spin_lock(&pegasus->rx_pool_lock);
 664         pegasus->rx_skb = pull_skb(pegasus);
 665         spin_unlock(&pegasus->rx_pool_lock);
 666
 667         if (pegasus->rx_skb == NULL)
 668                 goto tl_sched;
 669 goon:
 670         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
 671                           usb_rcvbulkpipe(pegasus->usb, 1),
 672                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
 673                           read_bulk_callback, pegasus);
 674         if (usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC)) {
 675                 pegasus->flags |= PEGASUS_RX_URB_FAIL;
 676                 goto tl_sched;
 677         } else {
 678                 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
 679         }
 680
 681         return;
 682
 683 tl_sched:
 684         tasklet_schedule(&pegasus->rx_tl);
 685 }
 686
 687 static void rx_fixup(unsigned long data)
 688 {
 689         pegasus_t *pegasus;
 690         unsigned long flags;
 691
 692         pegasus = (pegasus_t *) data;
 693         if (pegasus->flags & PEGASUS_UNPLUG)
 694                 return;
 695
 696         spin_lock_irqsave(&pegasus->rx_pool_lock, flags);
 697         fill_skb_pool(pegasus);
 698         if (pegasus->flags & PEGASUS_RX_URB_FAIL)
 699                 if (pegasus->rx_skb)
 700                         goto try_again;
 701         if (pegasus->rx_skb == NULL) {
 702                 pegasus->rx_skb = pull_skb(pegasus);
 703         }
 704         if (pegasus->rx_skb == NULL) {
 705                 if (netif_msg_rx_err(pegasus))
 706                         printk(KERN_WARNING "%s: low on memory\n",
 707                                         pegasus->net->name);
 708                 tasklet_schedule(&pegasus->rx_tl);
 709                 goto done;
 710         }
 711         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
 712                           usb_rcvbulkpipe(pegasus->usb, 1),
 713                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
 714                           read_bulk_callback, pegasus);
 715 try_again:
 716         if (usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC)) {
 717                 pegasus->flags |= PEGASUS_RX_URB_FAIL;
 718                 tasklet_schedule(&pegasus->rx_tl);
 719         } else {
 720                 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
 721         }
 722 done:
 723         spin_unlock_irqrestore(&pegasus->rx_pool_lock, flags);
 724 }
 725
 726 static void write_bulk_callback(struct urb *urb, struct pt_regs *regs)
 727 {
 728         pegasus_t *pegasus = urb->context;
 729         struct net_device *net = pegasus->net;
 730
 731         if (!pegasus)
 732                 return;
 733
 734         if (!netif_device_present(net) || !netif_running(net))
 735                 return;
 736
 737         switch (urb->status) {
 738         case -EPIPE:
 739                 /* FIXME schedule_work() to clear the tx halt */
 740                 netif_stop_queue(net);
 741                 if (netif_msg_tx_err(pegasus))
 742                         printk(KERN_WARNING "%s: no tx stall recovery\n",
 743                                         net->name);
 744                 return;
 745         case -ENOENT:
 746         case -ECONNRESET:
 747         case -ESHUTDOWN:
 748                 if (netif_msg_ifdown(pegasus))
 749                         pr_debug("%s: tx unlink, %d\n", net->name, urb->status);
 750                 return;
 751         default:
 752                 if (netif_msg_tx_err(pegasus))
 753                         pr_info("%s: TX status %d\n", net->name, urb->status);
 754                 /* FALL THROUGH */
 755         case 0:
 756                 break;
 757         }
 758
 759         net->trans_start = jiffies;
 760         netif_wake_queue(net);
 761 }
 762
 763 static void intr_callback(struct urb *urb, struct pt_regs *regs)
 764 {
 765         pegasus_t *pegasus = urb->context;
 766         struct net_device *net;
 767         int status;
 768
 769         if (!pegasus)
 770                 return;
 771         net = pegasus->net;
 772
 773         switch (urb->status) {
 774         case 0:
 775                 break;
 776         case -ECONNRESET:       /* unlink */
 777         case -ENOENT:
 778         case -ESHUTDOWN:
 779                 return;
 780         default:
 781                 /* some Pegasus-I products report LOTS of data
 782                  * toggle errors... avoid log spamming
 783                  */
 784                 if (netif_msg_timer(pegasus))
 785                         pr_debug("%s: intr status %d\n", net->name,
 786                                         urb->status);
 787         }
 788
 789         if (urb->actual_length >= 6) {
 790                 u8      * d = urb->transfer_buffer;
 791
 792                 /* byte 0 == tx_status1, reg 2B */
 793                 if (d[0] & (TX_UNDERRUN|EXCESSIVE_COL
 794                                         |LATE_COL|JABBER_TIMEOUT)) {
 795                         pegasus->stats.tx_errors++;
 796                         if (d[0] & TX_UNDERRUN)
 797                                 pegasus->stats.tx_fifo_errors++;
 798                         if (d[0] & (EXCESSIVE_COL | JABBER_TIMEOUT))
 799                                 pegasus->stats.tx_aborted_errors++;
 800                         if (d[0] & LATE_COL)
 801                                 pegasus->stats.tx_window_errors++;
 802                 }
 803
 804                 /* d[5].LINK_STATUS lies on some adapters.
 805                  * d[0].NO_CARRIER kicks in only with failed TX.
 806                  * ... so monitoring with MII may be safest.
 807                  */
 808                 if (d[0] & NO_CARRIER)
 809                         netif_carrier_off(net);
 810                 else
 811                         netif_carrier_on(net);
 812
 813                 /* bytes 3-4 == rx_lostpkt, reg 2E/2F */
 814                 pegasus->stats.rx_missed_errors += ((d[3] & 0x7f) << 8) | d[4];
 815         }
 816
 817         status = usb_submit_urb(urb, SLAB_ATOMIC);
 818         if (status && netif_msg_timer(pegasus))
 819                 printk(KERN_ERR "%s: can't resubmit interrupt urb, %d\n",
 820                                 net->name, status);
 821 }
 822
 823 static void pegasus_tx_timeout(struct net_device *net)
 824 {
 825         pegasus_t *pegasus = netdev_priv(net);
 826         if (netif_msg_timer(pegasus))
 827                 printk(KERN_WARNING "%s: tx timeout\n", net->name);
 828         usb_unlink_urb(pegasus->tx_urb);
 829         pegasus->stats.tx_errors++;
 830 }
 831
 832 static int pegasus_start_xmit(struct sk_buff *skb, struct net_device *net)
 833 {
 834         pegasus_t *pegasus = netdev_priv(net);
 835         int count = ((skb->len + 2) & 0x3f) ? skb->len + 2 : skb->len + 3;
 836         int res;
 837         __u16 l16 = skb->len;
 838
 839         netif_stop_queue(net);
 840
 841         ((__le16 *) pegasus->tx_buff)[0] = cpu_to_le16(l16);
 842         memcpy(pegasus->tx_buff + 2, skb->data, skb->len);
 843         usb_fill_bulk_urb(pegasus->tx_urb, pegasus->usb,
 844                           usb_sndbulkpipe(pegasus->usb, 2),
 845                           pegasus->tx_buff, count,
 846                           write_bulk_callback, pegasus);
 847         if ((res = usb_submit_urb(pegasus->tx_urb, GFP_ATOMIC))) {
 848                 if (netif_msg_tx_err(pegasus))
 849                         printk(KERN_WARNING "%s: fail tx, %d\n",
 850                                         net->name, res);
 851                 switch (res) {
 852                 case -EPIPE:            /* stall, or disconnect from TT */
 853                         /* cleanup should already have been scheduled */
 854                         break;
 855                 case -ENODEV:           /* disconnect() upcoming */
 856                         break;
 857                 default:
 858                         pegasus->stats.tx_errors++;
 859                         netif_start_queue(net);
 860                 }
 861         } else {
 862                 pegasus->stats.tx_packets++;
 863                 pegasus->stats.tx_bytes += skb->len;
 864                 net->trans_start = jiffies;
 865         }
 866         dev_kfree_skb(skb);
 867
 868         return 0;
 869 }
 870
 871 static struct net_device_stats *pegasus_netdev_stats(struct net_device *dev)
 872 {
 873         return &((pegasus_t *) netdev_priv(dev))->stats;
 874 }
 875
 876 static inline void disable_net_traffic(pegasus_t * pegasus)
 877 {
 878         int tmp = 0;
 879         int ret;
 880
 881         ret = set_registers(pegasus, EthCtrl0, 2, &tmp);
 882 }
 883
 884 static inline void get_interrupt_interval(pegasus_t * pegasus)
 885 {
 886         __u8 data[2];
 887
 888         read_eprom_word(pegasus, 4, (__u16 *) data);
 889         if (data[1] < 0x80) {
 890                 if (netif_msg_timer(pegasus))
 891                         dev_info(&pegasus->intf->dev,
 892                                 "intr interval changed from %ums to %ums\n",
 893                                 data[1], 0x80);
 894                 data[1] = 0x80;
 895 #ifdef  PEGASUS_WRITE_EEPROM
 896                 write_eprom_word(pegasus, 4, *(__u16 *) data);
 897 #endif
 898         }
 899         pegasus->intr_interval = data[1];
 900 }
 901
 902 static void set_carrier(struct net_device *net)
 903 {
 904         pegasus_t *pegasus = netdev_priv(net);
 905         u16 tmp;
 906
 907         if (read_mii_word(pegasus, pegasus->phy, MII_BMSR, &tmp))
 908                 return;
 909         if (tmp & BMSR_LSTATUS)
 910                 netif_carrier_on(net);
 911         else
 912                 netif_carrier_off(net);
 913 }
 914
 915 static void free_all_urbs(pegasus_t * pegasus)
 916 {
 917         usb_free_urb(pegasus->intr_urb);
 918         usb_free_urb(pegasus->tx_urb);
 919         usb_free_urb(pegasus->rx_urb);
 920         usb_free_urb(pegasus->ctrl_urb);
 921 }
 922
 923 static void unlink_all_urbs(pegasus_t * pegasus)
 924 {
 925         usb_kill_urb(pegasus->intr_urb);
 926         usb_kill_urb(pegasus->tx_urb);
 927         usb_kill_urb(pegasus->rx_urb);
 928         usb_kill_urb(pegasus->ctrl_urb);
 929 }
 930
 931 static int alloc_urbs(pegasus_t * pegasus)
 932 {
 933         pegasus->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
 934         if (!pegasus->ctrl_urb) {
 935                 return 0;
 936         }
 937         pegasus->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 938         if (!pegasus->rx_urb) {
 939                 usb_free_urb(pegasus->ctrl_urb);
 940                 return 0;
 941         }
 942         pegasus->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 943         if (!pegasus->tx_urb) {
 944                 usb_free_urb(pegasus->rx_urb);
 945                 usb_free_urb(pegasus->ctrl_urb);
 946                 return 0;
 947         }
 948         pegasus->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
 949         if (!pegasus->intr_urb) {
 950                 usb_free_urb(pegasus->tx_urb);
 951                 usb_free_urb(pegasus->rx_urb);
 952                 usb_free_urb(pegasus->ctrl_urb);
 953                 return 0;
 954         }
 955
 956         return 1;
 957 }
 958
 959 static int pegasus_open(struct net_device *net)
 960 {
 961         pegasus_t *pegasus = netdev_priv(net);
 962         int res;
 963
 964         if (pegasus->rx_skb == NULL)
 965                 pegasus->rx_skb = pull_skb(pegasus);
 966         /*
 967          ** Note: no point to free the pool.  it is empty :-)
 968          */
 969         if (!pegasus->rx_skb)
 970                 return -ENOMEM;
 971
 972         res = set_registers(pegasus, EthID, 6, net->dev_addr);
 973
 974         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
 975                           usb_rcvbulkpipe(pegasus->usb, 1),
 976                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
 977                           read_bulk_callback, pegasus);
 978         if ((res = usb_submit_urb(pegasus->rx_urb, GFP_KERNEL))) {
 979                 if (netif_msg_ifup(pegasus))
 980                         pr_debug("%s: failed rx_urb, %d", net->name, res);
 981                 goto exit;
 982         }
 983
 984         usb_fill_int_urb(pegasus->intr_urb, pegasus->usb,
 985                          usb_rcvintpipe(pegasus->usb, 3),
 986                          pegasus->intr_buff, sizeof (pegasus->intr_buff),
 987                          intr_callback, pegasus, pegasus->intr_interval);
 988         if ((res = usb_submit_urb(pegasus->intr_urb, GFP_KERNEL))) {
 989                 if (netif_msg_ifup(pegasus))
 990                         pr_debug("%s: failed intr_urb, %d\n", net->name, res);
 991                 usb_kill_urb(pegasus->rx_urb);
 992                 goto exit;
 993         }
 994         if ((res = enable_net_traffic(net, pegasus->usb))) {
 995                 if (netif_msg_ifup(pegasus))
 996                         pr_debug("%s: can't enable_net_traffic() - %d\n",
 997                                         net->name, res);
 998                 res = -EIO;
 999                 usb_kill_urb(pegasus->rx_urb);
1000                 usb_kill_urb(pegasus->intr_urb);
1001                 free_skb_pool(pegasus);
1002                 goto exit;
1003         }
1004         set_carrier(net);
1005         netif_start_queue(net);
1006         if (netif_msg_ifup(pegasus))
1007                 pr_debug("%s: open\n", net->name);
1008         res = 0;
1009 exit:
1010         return res;
1011 }
1012
1013 static int pegasus_close(struct net_device *net)
1014 {
1015         pegasus_t *pegasus = netdev_priv(net);
1016
1017         netif_stop_queue(net);
1018         if (!(pegasus->flags & PEGASUS_UNPLUG))
1019                 disable_net_traffic(pegasus);
1020         tasklet_kill(&pegasus->rx_tl);
1021         unlink_all_urbs(pegasus);
1022
1023         return 0;
1024 }
1025
1026 static void pegasus_get_drvinfo(struct net_device *dev,
1027                                 struct ethtool_drvinfo *info)
1028 {
1029         pegasus_t *pegasus = netdev_priv(dev);
1030         strncpy(info->driver, driver_name, sizeof (info->driver) - 1);
1031         strncpy(info->version, DRIVER_VERSION, sizeof (info->version) - 1);
1032         usb_make_path(pegasus->usb, info->bus_info, sizeof (info->bus_info));
1033 }
1034
1035 /* also handles three patterns of some kind in hardware */
1036 #define WOL_SUPPORTED   (WAKE_MAGIC|WAKE_PHY)
1037
1038 static void
1039 pegasus_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1040 {
1041         pegasus_t       *pegasus = netdev_priv(dev);
1042
1043         wol->supported = WAKE_MAGIC | WAKE_PHY;
1044         wol->wolopts = pegasus->wolopts;
1045 }
1046
1047 static int
1048 pegasus_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1049 {
1050         pegasus_t       *pegasus = netdev_priv(dev);
1051         u8              reg78 = 0x04;
1052
1053         if (wol->wolopts & ~WOL_SUPPORTED)
1054                 return -EINVAL;
1055
1056         if (wol->wolopts & WAKE_MAGIC)
1057                 reg78 |= 0x80;
1058         if (wol->wolopts & WAKE_PHY)
1059                 reg78 |= 0x40;
1060         /* FIXME this 0x10 bit still needs to get set in the chip... */
1061         if (wol->wolopts)
1062                 pegasus->eth_regs[0] |= 0x10;
1063         else
1064                 pegasus->eth_regs[0] &= ~0x10;
1065         pegasus->wolopts = wol->wolopts;
1066         return set_register(pegasus, WakeupControl, reg78);
1067 }
1068
1069 static inline void pegasus_reset_wol(struct net_device *dev)
1070 {
1071         struct ethtool_wolinfo wol;
1072
1073         memset(&wol, 0, sizeof wol);
1074         (void) pegasus_set_wol(dev, &wol);
1075 }
1076
1077 static int
1078 pegasus_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1079 {
1080         pegasus_t *pegasus;
1081
1082         if (in_atomic())
1083                 return 0;
1084
1085         pegasus = netdev_priv(dev);
1086         mii_ethtool_gset(&pegasus->mii, ecmd);
1087
1088         return 0;
1089 }
1090
1091 static int
1092 pegasus_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1093 {
1094         pegasus_t *pegasus = netdev_priv(dev);
1095         return mii_ethtool_sset(&pegasus->mii, ecmd);
1096 }
1097
1098 static int pegasus_nway_reset(struct net_device *dev)
1099 {
1100         pegasus_t *pegasus = netdev_priv(dev);
1101         return mii_nway_restart(&pegasus->mii);
1102 }
1103
1104 static u32 pegasus_get_link(struct net_device *dev)
1105 {
1106         pegasus_t *pegasus = netdev_priv(dev);
1107         return mii_link_ok(&pegasus->mii);
1108 }
1109
1110 static u32 pegasus_get_msglevel(struct net_device *dev)
1111 {
1112         pegasus_t *pegasus = netdev_priv(dev);
1113         return pegasus->msg_enable;
1114 }
1115
1116 static void pegasus_set_msglevel(struct net_device *dev, u32 v)
1117 {
1118         pegasus_t *pegasus = netdev_priv(dev);
1119         pegasus->msg_enable = v;
1120 }
1121
1122 static struct ethtool_ops ops = {
1123         .get_drvinfo = pegasus_get_drvinfo,
1124         .get_settings = pegasus_get_settings,
1125         .set_settings = pegasus_set_settings,
1126         .nway_reset = pegasus_nway_reset,
1127         .get_link = pegasus_get_link,
1128         .get_msglevel = pegasus_get_msglevel,
1129         .set_msglevel = pegasus_set_msglevel,
1130         .get_wol = pegasus_get_wol,
1131         .set_wol = pegasus_set_wol,
1132 };
1133
1134 static int pegasus_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
1135 {
1136         __u16 *data = (__u16 *) & rq->ifr_ifru;
1137         pegasus_t *pegasus = netdev_priv(net);
1138         int res;
1139
1140         switch (cmd) {
1141         case SIOCDEVPRIVATE:
1142                 data[0] = pegasus->phy;
1143         case SIOCDEVPRIVATE + 1:
1144                 read_mii_word(pegasus, data[0], data[1] & 0x1f, &data[3]);
1145                 res = 0;
1146                 break;
1147         case SIOCDEVPRIVATE + 2:
1148                 if (!capable(CAP_NET_ADMIN))
1149                         return -EPERM;
1150                 write_mii_word(pegasus, pegasus->phy, data[1] & 0x1f, data[2]);
1151                 res = 0;
1152                 break;
1153         default:
1154                 res = -EOPNOTSUPP;
1155         }
1156         return res;
1157 }
1158
1159 static void pegasus_set_multicast(struct net_device *net)
1160 {
1161         pegasus_t *pegasus = netdev_priv(net);
1162
1163         if (net->flags & IFF_PROMISC) {
1164                 pegasus->eth_regs[EthCtrl2] |= RX_PROMISCUOUS;
1165                 if (netif_msg_link(pegasus))
1166                         pr_info("%s: Promiscuous mode enabled.\n", net->name);
1167         } else if (net->mc_count ||
1168                    (net->flags & IFF_ALLMULTI)) {
1169                 pegasus->eth_regs[EthCtrl0] |= RX_MULTICAST;
1170                 pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1171                 if (netif_msg_link(pegasus))
1172                         pr_info("%s: set allmulti\n", net->name);
1173         } else {
1174                 pegasus->eth_regs[EthCtrl0] &= ~RX_MULTICAST;
1175                 pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1176         }
1177
1178         pegasus->flags |= ETH_REGS_CHANGE;
1179         ctrl_callback(pegasus->ctrl_urb, NULL);
1180 }
1181
1182 static __u8 mii_phy_probe(pegasus_t * pegasus)
1183 {
1184         int i;
1185         __u16 tmp;
1186
1187         for (i = 0; i < 32; i++) {
1188                 read_mii_word(pegasus, i, MII_BMSR, &tmp);
1189                 if (tmp == 0 || tmp == 0xffff || (tmp & BMSR_MEDIA) == 0)
1190                         continue;
1191                 else
1192                         return i;
1193         }
1194
1195         return 0xff;
1196 }
1197
1198 static inline void setup_pegasus_II(pegasus_t * pegasus)
1199 {
1200         __u8 data = 0xa5;
1201         int ret;
1202
1203         ret = set_register(pegasus, Reg1d, 0);
1204         ret = set_register(pegasus, Reg7b, 1);
1205         mdelay(100);
1206         if ((pegasus->features & HAS_HOME_PNA) && mii_mode)
1207                 ret = set_register(pegasus, Reg7b, 0);
1208         else
1209                 ret = set_register(pegasus, Reg7b, 2);
1210
1211         ret = set_register(pegasus, 0x83, data);
1212         ret = get_registers(pegasus, 0x83, 1, &data);
1213
1214         if (data == 0xa5) {
1215                 pegasus->chip = 0x8513;
1216         } else {
1217                 pegasus->chip = 0;
1218         }
1219
1220         ret = set_register(pegasus, 0x80, 0xc0);
1221         ret = set_register(pegasus, 0x83, 0xff);
1222         ret = set_register(pegasus, 0x84, 0x01);
1223
1224         if (pegasus->features & HAS_HOME_PNA && mii_mode)
1225                 ret = set_register(pegasus, Reg81, 6);
1226         else
1227                 ret = set_register(pegasus, Reg81, 2);
1228 }
1229
1230
1231 static struct workqueue_struct *pegasus_workqueue = NULL;
1232 #define CARRIER_CHECK_DELAY (2 * HZ)
1233
1234 static void check_carrier(void *data)
1235 {
1236         pegasus_t *pegasus = data;
1237         set_carrier(pegasus->net);
1238         if (!(pegasus->flags & PEGASUS_UNPLUG)) {
1239                 queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1240                         CARRIER_CHECK_DELAY);
1241         }
1242 }
1243
1244 static int pegasus_probe(struct usb_interface *intf,
1245                          const struct usb_device_id *id)
1246 {
1247         struct usb_device *dev = interface_to_usbdev(intf);
1248         struct net_device *net;
1249         pegasus_t *pegasus;
1250         int dev_index = id - pegasus_ids;
1251         int res = -ENOMEM;
1252
1253         usb_get_dev(dev);
1254         net = alloc_etherdev(sizeof(struct pegasus));
1255         if (!net) {
1256                 dev_err(&intf->dev, "can't allocate %s\n", "device");
1257                 goto out;
1258         }
1259
1260         pegasus = netdev_priv(net);
1261         memset(pegasus, 0, sizeof (struct pegasus));
1262         pegasus->dev_index = dev_index;
1263         init_waitqueue_head(&pegasus->ctrl_wait);
1264
1265         if (!alloc_urbs(pegasus)) {
1266                 dev_err(&intf->dev, "can't allocate %s\n", "urbs");
1267                 goto out1;
1268         }
1269
1270         tasklet_init(&pegasus->rx_tl, rx_fixup, (unsigned long) pegasus);
1271
1272         INIT_WORK(&pegasus->carrier_check, check_carrier, pegasus);
1273
1274         pegasus->intf = intf;
1275         pegasus->usb = dev;
1276         pegasus->net = net;
1277         SET_MODULE_OWNER(net);
1278         net->open = pegasus_open;
1279         net->stop = pegasus_close;
1280         net->watchdog_timeo = PEGASUS_TX_TIMEOUT;
1281         net->tx_timeout = pegasus_tx_timeout;
1282         net->do_ioctl = pegasus_ioctl;
1283         net->hard_start_xmit = pegasus_start_xmit;
1284         net->set_multicast_list = pegasus_set_multicast;
1285         net->get_stats = pegasus_netdev_stats;
1286         SET_ETHTOOL_OPS(net, &ops);
1287         pegasus->mii.dev = net;
1288         pegasus->mii.mdio_read = mdio_read;
1289         pegasus->mii.mdio_write = mdio_write;
1290         pegasus->mii.phy_id_mask = 0x1f;
1291         pegasus->mii.reg_num_mask = 0x1f;
1292         spin_lock_init(&pegasus->rx_pool_lock);
1293         pegasus->msg_enable = netif_msg_init (msg_level, NETIF_MSG_DRV
1294                                 | NETIF_MSG_PROBE | NETIF_MSG_LINK);
1295
1296         pegasus->features = usb_dev_id[dev_index].private;
1297         get_interrupt_interval(pegasus);
1298         if (reset_mac(pegasus)) {
1299                 dev_err(&intf->dev, "can't reset MAC\n");
1300                 res = -EIO;
1301                 goto out2;
1302         }
1303         set_ethernet_addr(pegasus);
1304         fill_skb_pool(pegasus);
1305         if (pegasus->features & PEGASUS_II) {
1306                 dev_info(&intf->dev, "setup Pegasus II specific registers\n");
1307                 setup_pegasus_II(pegasus);
1308         }
1309         pegasus->phy = mii_phy_probe(pegasus);
1310         if (pegasus->phy == 0xff) {
1311                 dev_warn(&intf->dev, "can't locate MII phy, using default\n");
1312                 pegasus->phy = 1;
1313         }
1314         pegasus->mii.phy_id = pegasus->phy;
1315         usb_set_intfdata(intf, pegasus);
1316         SET_NETDEV_DEV(net, &intf->dev);
1317         pegasus_reset_wol(net);
1318         res = register_netdev(net);
1319         if (res)
1320                 goto out3;
1321         queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1322                                 CARRIER_CHECK_DELAY);
1323
1324         dev_info(&intf->dev, "%s, %s, %02x:%02x:%02x:%02x:%02x:%02x\n",
1325                 net->name,
1326                 usb_dev_id[dev_index].name,
1327                 net->dev_addr [0], net->dev_addr [1],
1328                 net->dev_addr [2], net->dev_addr [3],
1329                 net->dev_addr [4], net->dev_addr [5]);
1330         return 0;
1331
1332 out3:
1333         usb_set_intfdata(intf, NULL);
1334         free_skb_pool(pegasus);
1335 out2:
1336         free_all_urbs(pegasus);
1337 out1:
1338         free_netdev(net);
1339 out:
1340         usb_put_dev(dev);
1341         return res;
1342 }
1343
1344 static void pegasus_disconnect(struct usb_interface *intf)
1345 {
1346         struct pegasus *pegasus = usb_get_intfdata(intf);
1347
1348         usb_set_intfdata(intf, NULL);
1349         if (!pegasus) {
1350                 dev_dbg(&intf->dev, "unregistering non-bound device?\n");
1351                 return;
1352         }
1353
1354         pegasus->flags |= PEGASUS_UNPLUG;
1355         cancel_delayed_work(&pegasus->carrier_check);
1356         unregister_netdev(pegasus->net);
1357         usb_put_dev(interface_to_usbdev(intf));
1358         free_all_urbs(pegasus);
1359         free_skb_pool(pegasus);
1360         if (pegasus->rx_skb)
1361                 dev_kfree_skb(pegasus->rx_skb);
1362         free_netdev(pegasus->net);
1363 }
1364
1365 static int pegasus_suspend (struct usb_interface *intf, pm_message_t message)
1366 {
1367         struct pegasus *pegasus = usb_get_intfdata(intf);
1368
1369         netif_device_detach (pegasus->net);
1370         if (netif_running(pegasus->net)) {
1371                 cancel_delayed_work(&pegasus->carrier_check);
1372
1373                 usb_kill_urb(pegasus->rx_urb);
1374                 usb_kill_urb(pegasus->intr_urb);
1375         }
1376         intf->dev.power.power_state = PMSG_SUSPEND;
1377         return 0;
1378 }
1379
1380 static int pegasus_resume (struct usb_interface *intf)
1381 {
1382         struct pegasus *pegasus = usb_get_intfdata(intf);
1383
1384         intf->dev.power.power_state = PMSG_ON;
1385         netif_device_attach (pegasus->net);
1386         if (netif_running(pegasus->net)) {
1387                 pegasus->rx_urb->status = 0;
1388                 pegasus->rx_urb->actual_length = 0;
1389                 read_bulk_callback(pegasus->rx_urb, NULL);
1390
1391                 pegasus->intr_urb->status = 0;
1392                 pegasus->intr_urb->actual_length = 0;
1393                 intr_callback(pegasus->intr_urb, NULL);
1394
1395                 queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1396                                         CARRIER_CHECK_DELAY);
1397         }
1398         return 0;
1399 }
1400
1401 static struct usb_driver pegasus_driver = {
1402         .name = driver_name,
1403         .probe = pegasus_probe,
1404         .disconnect = pegasus_disconnect,
1405         .id_table = pegasus_ids,
1406         .suspend = pegasus_suspend,
1407         .resume = pegasus_resume,
1408 };
1409
1410 static int __init pegasus_init(void)
1411 {
1412         pr_info("%s: %s, " DRIVER_DESC "\n", driver_name, DRIVER_VERSION);
1413         pegasus_workqueue = create_singlethread_workqueue("pegasus");
1414         if (!pegasus_workqueue)
1415                 return -ENOMEM;
1416         return usb_register(&pegasus_driver);
1417 }
1418
1419 static void __exit pegasus_exit(void)
1420 {
1421         destroy_workqueue(pegasus_workqueue);
1422         usb_deregister(&pegasus_driver);
1423 }
1424
1425 module_init(pegasus_init);
1426 module_exit(pegasus_exit);