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 #include <linux/sched.h>
  32 #include <linux/slab.h>
  33 #include <linux/init.h>
  34 #include <linux/delay.h>
  35 #include <linux/netdevice.h>
  36 #include <linux/etherdevice.h>
  37 #include <linux/ethtool.h>
  38 #include <linux/mii.h>
  39 #include <linux/usb.h>
  40 #include <linux/module.h>
  41 #include <asm/byteorder.h>
  42 #include <asm/uaccess.h>
  43 #include "pegasus.h"
  44
  45 /*
  46  * Version Information
  47  */
  48 #define DRIVER_VERSION "v0.6.13 (2005/11/13)"
  49 #define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>"
  50 #define DRIVER_DESC "Pegasus/Pegasus II USB Ethernet driver"
  51
  52 static const char driver_name[] = "pegasus";
  53
  54 #undef  PEGASUS_WRITE_EEPROM
  55 #define BMSR_MEDIA      (BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | \
  56                         BMSR_100FULL | BMSR_ANEGCAPABLE)
  57
  58 static int loopback = 0;
  59 static int mii_mode = 0;
  60 static char *devid=NULL;
  61
  62 static struct usb_eth_dev usb_dev_id[] = {
  63 #define PEGASUS_DEV(pn, vid, pid, flags)        \
  64         {.name = pn, .vendor = vid, .device = pid, .private = flags},
  65 #include "pegasus.h"
  66 #undef  PEGASUS_DEV
  67         {NULL, 0, 0, 0},
  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
  80 MODULE_AUTHOR(DRIVER_AUTHOR);
  81 MODULE_DESCRIPTION(DRIVER_DESC);
  82 MODULE_LICENSE("GPL");
  83 module_param(loopback, bool, 0);
  84 module_param(mii_mode, bool, 0);
  85 module_param(devid, charp, 0);
  86 MODULE_PARM_DESC(loopback, "Enable MAC loopback mode (bit 0)");
  87 MODULE_PARM_DESC(mii_mode, "Enable HomePNA mode (bit 0),default=MII mode = 0");
  88 MODULE_PARM_DESC(devid, "The format is: 'DEV_name:VendorID:DeviceID:Flags'");
  89
  90 /* use ethtool to change the level for any given device */
  91 static int msg_level = -1;
  92 module_param (msg_level, int, 0);
  93 MODULE_PARM_DESC (msg_level, "Override default message level");
  94
  95 MODULE_DEVICE_TABLE(usb, pegasus_ids);
  96
  97 static int update_eth_regs_async(pegasus_t *);
  98 /* Aargh!!! I _really_ hate such tweaks */
  99 static void ctrl_callback(struct urb *urb, struct pt_regs *regs)
 100 {
 101         pegasus_t *pegasus = urb->context;
 102
 103         if (!pegasus)
 104                 return;
 105
 106         switch (urb->status) {
 107         case 0:
 108                 if (pegasus->flags & ETH_REGS_CHANGE) {
 109                         pegasus->flags &= ~ETH_REGS_CHANGE;
 110                         pegasus->flags |= ETH_REGS_CHANGED;
 111                         update_eth_regs_async(pegasus);
 112                         return;
 113                 }
 114                 break;
 115         case -EINPROGRESS:
 116                 return;
 117         case -ENOENT:
 118                 break;
 119         default:
 120                 if (netif_msg_drv(pegasus))
 121                         dev_dbg(&pegasus->intf->dev, "%s, status %d\n",
 122                                 __FUNCTION__, urb->status);
 123         }
 124         pegasus->flags &= ~ETH_REGS_CHANGED;
 125         wake_up(&pegasus->ctrl_wait);
 126 }
 127
 128 static int get_registers(pegasus_t * pegasus, __u16 indx, __u16 size,
 129                          void *data)
 130 {
 131         int ret;
 132         char *buffer;
 133         DECLARE_WAITQUEUE(wait, current);
 134
 135         buffer = kmalloc(size, GFP_KERNEL);
 136         if (!buffer) {
 137                 if (netif_msg_drv(pegasus))
 138                         dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
 139                                         __FUNCTION__);
 140                 return -ENOMEM;
 141         }
 142         add_wait_queue(&pegasus->ctrl_wait, &wait);
 143         set_current_state(TASK_UNINTERRUPTIBLE);
 144         while (pegasus->flags & ETH_REGS_CHANGED)
 145                 schedule();
 146         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 147         set_current_state(TASK_RUNNING);
 148
 149         pegasus->dr.bRequestType = PEGASUS_REQT_READ;
 150         pegasus->dr.bRequest = PEGASUS_REQ_GET_REGS;
 151         pegasus->dr.wValue = cpu_to_le16(0);
 152         pegasus->dr.wIndex = cpu_to_le16p(&indx);
 153         pegasus->dr.wLength = cpu_to_le16p(&size);
 154         pegasus->ctrl_urb->transfer_buffer_length = size;
 155
 156         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 157                              usb_rcvctrlpipe(pegasus->usb, 0),
 158                              (char *) &pegasus->dr,
 159                              buffer, size, ctrl_callback, pegasus);
 160
 161         add_wait_queue(&pegasus->ctrl_wait, &wait);
 162         set_current_state(TASK_UNINTERRUPTIBLE);
 163
 164         /* using ATOMIC, we'd never wake up if we slept */
 165         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 166                 if (netif_msg_drv(pegasus))
 167                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 168                                         __FUNCTION__, ret);
 169                 goto out;
 170         }
 171
 172         schedule();
 173 out:
 174         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 175         memcpy(data, buffer, size);
 176         kfree(buffer);
 177
 178         return ret;
 179 }
 180
 181 static int set_registers(pegasus_t * pegasus, __u16 indx, __u16 size,
 182                          void *data)
 183 {
 184         int ret;
 185         char *buffer;
 186         DECLARE_WAITQUEUE(wait, current);
 187
 188         buffer = kmalloc(size, GFP_KERNEL);
 189         if (!buffer) {
 190                 if (netif_msg_drv(pegasus))
 191                         dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
 192                                         __FUNCTION__);
 193                 return -ENOMEM;
 194         }
 195         memcpy(buffer, data, size);
 196
 197         add_wait_queue(&pegasus->ctrl_wait, &wait);
 198         set_current_state(TASK_UNINTERRUPTIBLE);
 199         while (pegasus->flags & ETH_REGS_CHANGED)
 200                 schedule();
 201         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 202         set_current_state(TASK_RUNNING);
 203
 204         pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
 205         pegasus->dr.bRequest = PEGASUS_REQ_SET_REGS;
 206         pegasus->dr.wValue = cpu_to_le16(0);
 207         pegasus->dr.wIndex = cpu_to_le16p(&indx);
 208         pegasus->dr.wLength = cpu_to_le16p(&size);
 209         pegasus->ctrl_urb->transfer_buffer_length = size;
 210
 211         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 212                              usb_sndctrlpipe(pegasus->usb, 0),
 213                              (char *) &pegasus->dr,
 214                              buffer, size, ctrl_callback, pegasus);
 215
 216         add_wait_queue(&pegasus->ctrl_wait, &wait);
 217         set_current_state(TASK_UNINTERRUPTIBLE);
 218
 219         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 220                 if (netif_msg_drv(pegasus))
 221                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 222                                         __FUNCTION__, ret);
 223                 goto out;
 224         }
 225
 226         schedule();
 227 out:
 228         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 229         kfree(buffer);
 230
 231         return ret;
 232 }
 233
 234 static int set_register(pegasus_t * pegasus, __u16 indx, __u8 data)
 235 {
 236         int ret;
 237         char *tmp;
 238         DECLARE_WAITQUEUE(wait, current);
 239
 240         tmp = kmalloc(1, GFP_KERNEL);
 241         if (!tmp) {
 242                 if (netif_msg_drv(pegasus))
 243                         dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
 244                                         __FUNCTION__);
 245                 return -ENOMEM;
 246         }
 247         memcpy(tmp, &data, 1);
 248         add_wait_queue(&pegasus->ctrl_wait, &wait);
 249         set_current_state(TASK_UNINTERRUPTIBLE);
 250         while (pegasus->flags & ETH_REGS_CHANGED)
 251                 schedule();
 252         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 253         set_current_state(TASK_RUNNING);
 254
 255         pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
 256         pegasus->dr.bRequest = PEGASUS_REQ_SET_REG;
 257         pegasus->dr.wValue = cpu_to_le16(data);
 258         pegasus->dr.wIndex = cpu_to_le16p(&indx);
 259         pegasus->dr.wLength = cpu_to_le16(1);
 260         pegasus->ctrl_urb->transfer_buffer_length = 1;
 261
 262         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 263                              usb_sndctrlpipe(pegasus->usb, 0),
 264                              (char *) &pegasus->dr,
 265                              &tmp, 1, ctrl_callback, pegasus);
 266
 267         add_wait_queue(&pegasus->ctrl_wait, &wait);
 268         set_current_state(TASK_UNINTERRUPTIBLE);
 269
 270         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 271                 if (netif_msg_drv(pegasus))
 272                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 273                                         __FUNCTION__, ret);
 274                 goto out;
 275         }
 276
 277         schedule();
 278 out:
 279         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 280         kfree(tmp);
 281
 282         return ret;
 283 }
 284
 285 static int update_eth_regs_async(pegasus_t * pegasus)
 286 {
 287         int ret;
 288
 289         pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
 290         pegasus->dr.bRequest = PEGASUS_REQ_SET_REGS;
 291         pegasus->dr.wValue = 0;
 292         pegasus->dr.wIndex = cpu_to_le16(EthCtrl0);
 293         pegasus->dr.wLength = cpu_to_le16(3);
 294         pegasus->ctrl_urb->transfer_buffer_length = 3;
 295
 296         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 297                              usb_sndctrlpipe(pegasus->usb, 0),
 298                              (char *) &pegasus->dr,
 299                              pegasus->eth_regs, 3, ctrl_callback, pegasus);
 300
 301         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC)))
 302                 if (netif_msg_drv(pegasus))
 303                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 304                                         __FUNCTION__, ret);
 305
 306         return ret;
 307 }
 308
 309 static int read_mii_word(pegasus_t * pegasus, __u8 phy, __u8 indx, __u16 * regd)
 310 {
 311         int i;
 312         __u8 data[4] = { phy, 0, 0, indx };
 313         __le16 regdi;
 314         int ret;
 315
 316         set_register(pegasus, PhyCtrl, 0);
 317         set_registers(pegasus, PhyAddr, sizeof (data), data);
 318         set_register(pegasus, PhyCtrl, (indx | PHY_READ));
 319         for (i = 0; i < REG_TIMEOUT; i++) {
 320                 ret = get_registers(pegasus, PhyCtrl, 1, data);
 321                 if (data[0] & PHY_DONE)
 322                         break;
 323         }
 324         if (i < REG_TIMEOUT) {
 325                 ret = get_registers(pegasus, PhyData, 2, &regdi);
 326                 *regd = le16_to_cpu(regdi);
 327                 return ret;
 328         }
 329         if (netif_msg_drv(pegasus))
 330                 dev_warn(&pegasus->intf->dev, "fail %s\n", __FUNCTION__);
 331
 332         return ret;
 333 }
 334
 335 static int mdio_read(struct net_device *dev, int phy_id, int loc)
 336 {
 337         pegasus_t *pegasus = (pegasus_t *) netdev_priv(dev);
 338         u16 res;
 339
 340         read_mii_word(pegasus, phy_id, loc, &res);
 341         return (int)res;
 342 }
 343
 344 static int write_mii_word(pegasus_t * pegasus, __u8 phy, __u8 indx, __u16 regd)
 345 {
 346         int i;
 347         __u8 data[4] = { phy, 0, 0, indx };
 348         int ret;
 349
 350         data[1] = (u8) regd;
 351         data[2] = (u8) (regd >> 8);
 352         set_register(pegasus, PhyCtrl, 0);
 353         set_registers(pegasus, PhyAddr, sizeof(data), data);
 354         set_register(pegasus, PhyCtrl, (indx | PHY_WRITE));
 355         for (i = 0; i < REG_TIMEOUT; i++) {
 356                 ret = get_registers(pegasus, PhyCtrl, 1, data);
 357                 if (data[0] & PHY_DONE)
 358                         break;
 359         }
 360         if (i < REG_TIMEOUT)
 361                 return ret;
 362
 363         if (netif_msg_drv(pegasus))
 364                 dev_warn(&pegasus->intf->dev, "fail %s\n", __FUNCTION__);
 365         return -ETIMEDOUT;
 366 }
 367
 368 static void mdio_write(struct net_device *dev, int phy_id, int loc, int val)
 369 {
 370         pegasus_t *pegasus = (pegasus_t *) netdev_priv(dev);
 371
 372         write_mii_word(pegasus, phy_id, loc, val);
 373 }
 374
 375 static int read_eprom_word(pegasus_t * pegasus, __u8 index, __u16 * retdata)
 376 {
 377         int i;
 378         __u8 tmp;
 379         __le16 retdatai;
 380         int ret;
 381
 382         set_register(pegasus, EpromCtrl, 0);
 383         set_register(pegasus, EpromOffset, index);
 384         set_register(pegasus, EpromCtrl, EPROM_READ);
 385
 386         for (i = 0; i < REG_TIMEOUT; i++) {
 387                 ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
 388                 if (tmp & EPROM_DONE)
 389                         break;
 390         }
 391         if (i < REG_TIMEOUT) {
 392                 ret = get_registers(pegasus, EpromData, 2, &retdatai);
 393                 *retdata = le16_to_cpu(retdatai);
 394                 return ret;
 395         }
 396
 397         if (netif_msg_drv(pegasus))
 398                 dev_warn(&pegasus->intf->dev, "fail %s\n", __FUNCTION__);
 399         return -ETIMEDOUT;
 400 }
 401
 402 #ifdef  PEGASUS_WRITE_EEPROM
 403 static inline void enable_eprom_write(pegasus_t * pegasus)
 404 {
 405         __u8 tmp;
 406         int ret;
 407
 408         get_registers(pegasus, EthCtrl2, 1, &tmp);
 409         set_register(pegasus, EthCtrl2, tmp | EPROM_WR_ENABLE);
 410 }
 411
 412 static inline void disable_eprom_write(pegasus_t * pegasus)
 413 {
 414         __u8 tmp;
 415         int ret;
 416
 417         get_registers(pegasus, EthCtrl2, 1, &tmp);
 418         set_register(pegasus, EpromCtrl, 0);
 419         set_register(pegasus, EthCtrl2, tmp & ~EPROM_WR_ENABLE);
 420 }
 421
 422 static int write_eprom_word(pegasus_t * pegasus, __u8 index, __u16 data)
 423 {
 424         int i;
 425         __u8 tmp, d[4] = { 0x3f, 0, 0, EPROM_WRITE };
 426         int ret;
 427
 428         set_registers(pegasus, EpromOffset, 4, d);
 429         enable_eprom_write(pegasus);
 430         set_register(pegasus, EpromOffset, index);
 431         set_registers(pegasus, EpromData, 2, &data);
 432         set_register(pegasus, EpromCtrl, EPROM_WRITE);
 433
 434         for (i = 0; i < REG_TIMEOUT; i++) {
 435                 ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
 436                 if (tmp & EPROM_DONE)
 437                         break;
 438         }
 439         disable_eprom_write(pegasus);
 440         if (i < REG_TIMEOUT)
 441                 return ret;
 442         if (netif_msg_drv(pegasus))
 443                 dev_warn(&pegasus->intf->dev, "fail %s\n", __FUNCTION__);
 444         return -ETIMEDOUT;
 445 }
 446 #endif                          /* PEGASUS_WRITE_EEPROM */
 447
 448 static inline void get_node_id(pegasus_t * pegasus, __u8 * id)
 449 {
 450         int i;
 451         __u16 w16;
 452
 453         for (i = 0; i < 3; i++) {
 454                 read_eprom_word(pegasus, i, &w16);
 455                 ((__le16 *) id)[i] = cpu_to_le16p(&w16);
 456         }
 457 }
 458
 459 static void set_ethernet_addr(pegasus_t * pegasus)
 460 {
 461         __u8 node_id[6];
 462
 463         get_node_id(pegasus, node_id);
 464         set_registers(pegasus, EthID, sizeof (node_id), node_id);
 465         memcpy(pegasus->net->dev_addr, node_id, sizeof (node_id));
 466 }
 467
 468 static inline int reset_mac(pegasus_t * pegasus)
 469 {
 470         __u8 data = 0x8;
 471         int i;
 472
 473         set_register(pegasus, EthCtrl1, data);
 474         for (i = 0; i < REG_TIMEOUT; i++) {
 475                 get_registers(pegasus, EthCtrl1, 1, &data);
 476                 if (~data & 0x08) {
 477                         if (loopback & 1)
 478                                 break;
 479                         if (mii_mode && (pegasus->features & HAS_HOME_PNA))
 480                                 set_register(pegasus, Gpio1, 0x34);
 481                         else
 482                                 set_register(pegasus, Gpio1, 0x26);
 483                         set_register(pegasus, Gpio0, pegasus->features);
 484                         set_register(pegasus, Gpio0, DEFAULT_GPIO_SET);
 485                         break;
 486                 }
 487         }
 488         if (i == REG_TIMEOUT)
 489                 return -ETIMEDOUT;
 490
 491         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
 492             usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
 493                 set_register(pegasus, Gpio0, 0x24);
 494                 set_register(pegasus, Gpio0, 0x26);
 495         }
 496         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_ELCON) {
 497                 __u16 auxmode;
 498                 read_mii_word(pegasus, 3, 0x1b, &auxmode);
 499                 write_mii_word(pegasus, 3, 0x1b, auxmode | 4);
 500         }
 501
 502         return 0;
 503 }
 504
 505 static int enable_net_traffic(struct net_device *dev, struct usb_device *usb)
 506 {
 507         __u16 linkpart;
 508         __u8 data[4];
 509         pegasus_t *pegasus = netdev_priv(dev);
 510         int ret;
 511
 512         read_mii_word(pegasus, pegasus->phy, MII_LPA, &linkpart);
 513         data[0] = 0xc9;
 514         data[1] = 0;
 515         if (linkpart & (ADVERTISE_100FULL | ADVERTISE_10FULL))
 516                 data[1] |= 0x20;        /* set full duplex */
 517         if (linkpart & (ADVERTISE_100FULL | ADVERTISE_100HALF))
 518                 data[1] |= 0x10;        /* set 100 Mbps */
 519         if (mii_mode)
 520                 data[1] = 0;
 521         data[2] = (loopback & 1) ? 0x09 : 0x01;
 522
 523         memcpy(pegasus->eth_regs, data, sizeof (data));
 524         ret = set_registers(pegasus, EthCtrl0, 3, data);
 525
 526         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
 527             usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
 528                 u16 auxmode;
 529                 read_mii_word(pegasus, 0, 0x1b, &auxmode);
 530                 write_mii_word(pegasus, 0, 0x1b, auxmode | 4);
 531         }
 532
 533         return ret;
 534 }
 535
 536 static void fill_skb_pool(pegasus_t * pegasus)
 537 {
 538         int i;
 539
 540         for (i = 0; i < RX_SKBS; i++) {
 541                 if (pegasus->rx_pool[i])
 542                         continue;
 543                 pegasus->rx_pool[i] = dev_alloc_skb(PEGASUS_MTU + 2);
 544                 /*
 545                  ** we give up if the allocation fail. the tasklet will be
 546                  ** rescheduled again anyway...
 547                  */
 548                 if (pegasus->rx_pool[i] == NULL)
 549                         return;
 550                 pegasus->rx_pool[i]->dev = pegasus->net;
 551                 skb_reserve(pegasus->rx_pool[i], 2);
 552         }
 553 }
 554
 555 static void free_skb_pool(pegasus_t * pegasus)
 556 {
 557         int i;
 558
 559         for (i = 0; i < RX_SKBS; i++) {
 560                 if (pegasus->rx_pool[i]) {
 561                         dev_kfree_skb(pegasus->rx_pool[i]);
 562                         pegasus->rx_pool[i] = NULL;
 563                 }
 564         }
 565 }
 566
 567 static inline struct sk_buff *pull_skb(pegasus_t * pegasus)
 568 {
 569         int i;
 570         struct sk_buff *skb;
 571
 572         for (i = 0; i < RX_SKBS; i++) {
 573                 if (likely(pegasus->rx_pool[i] != NULL)) {
 574                         skb = pegasus->rx_pool[i];
 575                         pegasus->rx_pool[i] = NULL;
 576                         return skb;
 577                 }
 578         }
 579         return NULL;
 580 }
 581
 582 static void read_bulk_callback(struct urb *urb, struct pt_regs *regs)
 583 {
 584         pegasus_t *pegasus = urb->context;
 585         struct net_device *net;
 586         int rx_status, count = urb->actual_length;
 587         u8 *buf = urb->transfer_buffer;
 588         __u16 pkt_len;
 589
 590         if (!pegasus)
 591                 return;
 592
 593         net = pegasus->net;
 594         if (!netif_device_present(net) || !netif_running(net))
 595                 return;
 596
 597         switch (urb->status) {
 598         case 0:
 599                 break;
 600         case -ETIMEDOUT:
 601                 if (netif_msg_rx_err(pegasus))
 602                         pr_debug("%s: reset MAC\n", net->name);
 603                 pegasus->flags &= ~PEGASUS_RX_BUSY;
 604                 break;
 605         case -EPIPE:            /* stall, or disconnect from TT */
 606                 /* FIXME schedule work to clear the halt */
 607                 if (netif_msg_rx_err(pegasus))
 608                         printk(KERN_WARNING "%s: no rx stall recovery\n",
 609                                         net->name);
 610                 return;
 611         case -ENOENT:
 612         case -ECONNRESET:
 613         case -ESHUTDOWN:
 614                 if (netif_msg_ifdown(pegasus))
 615                         pr_debug("%s: rx unlink, %d\n", net->name, urb->status);
 616                 return;
 617         default:
 618                 if (netif_msg_rx_err(pegasus))
 619                         pr_debug("%s: RX status %d\n", net->name, urb->status);
 620                 goto goon;
 621         }
 622
 623         if (!count || count < 4)
 624                 goto goon;
 625
 626         rx_status = buf[count - 2];
 627         if (rx_status & 0x1e) {
 628                 if (netif_msg_rx_err(pegasus))
 629                         pr_debug("%s: RX packet error %x\n",
 630                                         net->name, rx_status);
 631                 pegasus->stats.rx_errors++;
 632                 if (rx_status & 0x06)   // long or runt
 633                         pegasus->stats.rx_length_errors++;
 634                 if (rx_status & 0x08)
 635                         pegasus->stats.rx_crc_errors++;
 636                 if (rx_status & 0x10)   // extra bits
 637                         pegasus->stats.rx_frame_errors++;
 638                 goto goon;
 639         }
 640         if (pegasus->chip == 0x8513) {
 641                 pkt_len = le32_to_cpu(*(__le32 *)urb->transfer_buffer);
 642                 pkt_len &= 0x0fff;
 643                 pegasus->rx_skb->data += 2;
 644         } else {
 645                 pkt_len = buf[count - 3] << 8;
 646                 pkt_len += buf[count - 4];
 647                 pkt_len &= 0xfff;
 648                 pkt_len -= 8;
 649         }
 650
 651         /*
 652          * If the packet is unreasonably long, quietly drop it rather than
 653          * kernel panicing by calling skb_put.
 654          */
 655         if (pkt_len > PEGASUS_MTU)
 656                 goto goon;
 657
 658         /*
 659          * at this point we are sure pegasus->rx_skb != NULL
 660          * so we go ahead and pass up the packet.
 661          */
 662         skb_put(pegasus->rx_skb, pkt_len);
 663         pegasus->rx_skb->protocol = eth_type_trans(pegasus->rx_skb, net);
 664         netif_rx(pegasus->rx_skb);
 665         pegasus->stats.rx_packets++;
 666         pegasus->stats.rx_bytes += pkt_len;
 667
 668         if (pegasus->flags & PEGASUS_UNPLUG)
 669                 return;
 670
 671         spin_lock(&pegasus->rx_pool_lock);
 672         pegasus->rx_skb = pull_skb(pegasus);
 673         spin_unlock(&pegasus->rx_pool_lock);
 674
 675         if (pegasus->rx_skb == NULL)
 676                 goto tl_sched;
 677 goon:
 678         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
 679                           usb_rcvbulkpipe(pegasus->usb, 1),
 680                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
 681                           read_bulk_callback, pegasus);
 682         if (usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC)) {
 683                 pegasus->flags |= PEGASUS_RX_URB_FAIL;
 684                 goto tl_sched;
 685         } else {
 686                 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
 687         }
 688
 689         return;
 690
 691 tl_sched:
 692         tasklet_schedule(&pegasus->rx_tl);
 693 }
 694
 695 static void rx_fixup(unsigned long data)
 696 {
 697         pegasus_t *pegasus;
 698         unsigned long flags;
 699
 700         pegasus = (pegasus_t *) data;
 701         if (pegasus->flags & PEGASUS_UNPLUG)
 702                 return;
 703
 704         spin_lock_irqsave(&pegasus->rx_pool_lock, flags);
 705         fill_skb_pool(pegasus);
 706         if (pegasus->flags & PEGASUS_RX_URB_FAIL)
 707                 if (pegasus->rx_skb)
 708                         goto try_again;
 709         if (pegasus->rx_skb == NULL) {
 710                 pegasus->rx_skb = pull_skb(pegasus);
 711         }
 712         if (pegasus->rx_skb == NULL) {
 713                 if (netif_msg_rx_err(pegasus))
 714                         printk(KERN_WARNING "%s: low on memory\n",
 715                                         pegasus->net->name);
 716                 tasklet_schedule(&pegasus->rx_tl);
 717                 goto done;
 718         }
 719         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
 720                           usb_rcvbulkpipe(pegasus->usb, 1),
 721                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
 722                           read_bulk_callback, pegasus);
 723 try_again:
 724         if (usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC)) {
 725                 pegasus->flags |= PEGASUS_RX_URB_FAIL;
 726                 tasklet_schedule(&pegasus->rx_tl);
 727         } else {
 728                 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
 729         }
 730 done:
 731         spin_unlock_irqrestore(&pegasus->rx_pool_lock, flags);
 732 }
 733
 734 static void write_bulk_callback(struct urb *urb, struct pt_regs *regs)
 735 {
 736         pegasus_t *pegasus = urb->context;
 737         struct net_device *net = pegasus->net;
 738
 739         if (!pegasus)
 740                 return;
 741
 742         if (!netif_device_present(net) || !netif_running(net))
 743                 return;
 744
 745         switch (urb->status) {
 746         case -EPIPE:
 747                 /* FIXME schedule_work() to clear the tx halt */
 748                 netif_stop_queue(net);
 749                 if (netif_msg_tx_err(pegasus))
 750                         printk(KERN_WARNING "%s: no tx stall recovery\n",
 751                                         net->name);
 752                 return;
 753         case -ENOENT:
 754         case -ECONNRESET:
 755         case -ESHUTDOWN:
 756                 if (netif_msg_ifdown(pegasus))
 757                         pr_debug("%s: tx unlink, %d\n", net->name, urb->status);
 758                 return;
 759         default:
 760                 if (netif_msg_tx_err(pegasus))
 761                         pr_info("%s: TX status %d\n", net->name, urb->status);
 762                 /* FALL THROUGH */
 763         case 0:
 764                 break;
 765         }
 766
 767         net->trans_start = jiffies;
 768         netif_wake_queue(net);
 769 }
 770
 771 static void intr_callback(struct urb *urb, struct pt_regs *regs)
 772 {
 773         pegasus_t *pegasus = urb->context;
 774         struct net_device *net;
 775         int status;
 776
 777         if (!pegasus)
 778                 return;
 779         net = pegasus->net;
 780
 781         switch (urb->status) {
 782         case 0:
 783                 break;
 784         case -ECONNRESET:       /* unlink */
 785         case -ENOENT:
 786         case -ESHUTDOWN:
 787                 return;
 788         default:
 789                 /* some Pegasus-I products report LOTS of data
 790                  * toggle errors... avoid log spamming
 791                  */
 792                 if (netif_msg_timer(pegasus))
 793                         pr_debug("%s: intr status %d\n", net->name,
 794                                         urb->status);
 795         }
 796
 797         if (urb->actual_length >= 6) {
 798                 u8      * d = urb->transfer_buffer;
 799
 800                 /* byte 0 == tx_status1, reg 2B */
 801                 if (d[0] & (TX_UNDERRUN|EXCESSIVE_COL
 802                                         |LATE_COL|JABBER_TIMEOUT)) {
 803                         pegasus->stats.tx_errors++;
 804                         if (d[0] & TX_UNDERRUN)
 805                                 pegasus->stats.tx_fifo_errors++;
 806                         if (d[0] & (EXCESSIVE_COL | JABBER_TIMEOUT))
 807                                 pegasus->stats.tx_aborted_errors++;
 808                         if (d[0] & LATE_COL)
 809                                 pegasus->stats.tx_window_errors++;
 810                 }
 811
 812                 /* d[5].LINK_STATUS lies on some adapters.
 813                  * d[0].NO_CARRIER kicks in only with failed TX.
 814                  * ... so monitoring with MII may be safest.
 815                  */
 816                 if (d[0] & NO_CARRIER)
 817                         netif_carrier_off(net);
 818                 else
 819                         netif_carrier_on(net);
 820
 821                 /* bytes 3-4 == rx_lostpkt, reg 2E/2F */
 822                 pegasus->stats.rx_missed_errors += ((d[3] & 0x7f) << 8) | d[4];
 823         }
 824
 825         status = usb_submit_urb(urb, SLAB_ATOMIC);
 826         if (status && netif_msg_timer(pegasus))
 827                 printk(KERN_ERR "%s: can't resubmit interrupt urb, %d\n",
 828                                 net->name, status);
 829 }
 830
 831 static void pegasus_tx_timeout(struct net_device *net)
 832 {
 833         pegasus_t *pegasus = netdev_priv(net);
 834         if (netif_msg_timer(pegasus))
 835                 printk(KERN_WARNING "%s: tx timeout\n", net->name);
 836         usb_unlink_urb(pegasus->tx_urb);
 837         pegasus->stats.tx_errors++;
 838 }
 839
 840 static int pegasus_start_xmit(struct sk_buff *skb, struct net_device *net)
 841 {
 842         pegasus_t *pegasus = netdev_priv(net);
 843         int count = ((skb->len + 2) & 0x3f) ? skb->len + 2 : skb->len + 3;
 844         int res;
 845         __u16 l16 = skb->len;
 846
 847         netif_stop_queue(net);
 848
 849         ((__le16 *) pegasus->tx_buff)[0] = cpu_to_le16(l16);
 850         memcpy(pegasus->tx_buff + 2, skb->data, skb->len);
 851         usb_fill_bulk_urb(pegasus->tx_urb, pegasus->usb,
 852                           usb_sndbulkpipe(pegasus->usb, 2),
 853                           pegasus->tx_buff, count,
 854                           write_bulk_callback, pegasus);
 855         if ((res = usb_submit_urb(pegasus->tx_urb, GFP_ATOMIC))) {
 856                 if (netif_msg_tx_err(pegasus))
 857                         printk(KERN_WARNING "%s: fail tx, %d\n",
 858                                         net->name, res);
 859                 switch (res) {
 860                 case -EPIPE:            /* stall, or disconnect from TT */
 861                         /* cleanup should already have been scheduled */
 862                         break;
 863                 case -ENODEV:           /* disconnect() upcoming */
 864                         break;
 865                 default:
 866                         pegasus->stats.tx_errors++;
 867                         netif_start_queue(net);
 868                 }
 869         } else {
 870                 pegasus->stats.tx_packets++;
 871                 pegasus->stats.tx_bytes += skb->len;
 872                 net->trans_start = jiffies;
 873         }
 874         dev_kfree_skb(skb);
 875
 876         return 0;
 877 }
 878
 879 static struct net_device_stats *pegasus_netdev_stats(struct net_device *dev)
 880 {
 881         return &((pegasus_t *) netdev_priv(dev))->stats;
 882 }
 883
 884 static inline void disable_net_traffic(pegasus_t * pegasus)
 885 {
 886         int tmp = 0;
 887
 888         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
1212         set_register(pegasus, Reg1d, 0);
1213         set_register(pegasus, Reg7b, 1);
1214         mdelay(100);
1215         if ((pegasus->features & HAS_HOME_PNA) && mii_mode)
1216                 set_register(pegasus, Reg7b, 0);
1217         else
1218                 set_register(pegasus, Reg7b, 2);
1219
1220         set_register(pegasus, 0x83, data);
1221         get_registers(pegasus, 0x83, 1, &data);
1222
1223         if (data == 0xa5) {
1224                 pegasus->chip = 0x8513;
1225         } else {
1226                 pegasus->chip = 0;
1227         }
1228
1229         set_register(pegasus, 0x80, 0xc0);
1230         set_register(pegasus, 0x83, 0xff);
1231         set_register(pegasus, 0x84, 0x01);
1232
1233         if (pegasus->features & HAS_HOME_PNA && mii_mode)
1234                 set_register(pegasus, Reg81, 6);
1235         else
1236                 set_register(pegasus, Reg81, 2);
1237 }
1238
1239
1240 static struct workqueue_struct *pegasus_workqueue = NULL;
1241 #define CARRIER_CHECK_DELAY (2 * HZ)
1242
1243 static void check_carrier(void *data)
1244 {
1245         pegasus_t *pegasus = data;
1246         set_carrier(pegasus->net);
1247         if (!(pegasus->flags & PEGASUS_UNPLUG)) {
1248                 queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1249                         CARRIER_CHECK_DELAY);
1250         }
1251 }
1252
1253 static int pegasus_probe(struct usb_interface *intf,
1254                          const struct usb_device_id *id)
1255 {
1256         struct usb_device *dev = interface_to_usbdev(intf);
1257         struct net_device *net;
1258         pegasus_t *pegasus;
1259         int dev_index = id - pegasus_ids;
1260         int res = -ENOMEM;
1261
1262         usb_get_dev(dev);
1263         net = alloc_etherdev(sizeof(struct pegasus));
1264         if (!net) {
1265                 dev_err(&intf->dev, "can't allocate %s\n", "device");
1266                 goto out;
1267         }
1268
1269         pegasus = netdev_priv(net);
1270         memset(pegasus, 0, sizeof (struct pegasus));
1271         pegasus->dev_index = dev_index;
1272         init_waitqueue_head(&pegasus->ctrl_wait);
1273
1274         if (!alloc_urbs(pegasus)) {
1275                 dev_err(&intf->dev, "can't allocate %s\n", "urbs");
1276                 goto out1;
1277         }
1278
1279         tasklet_init(&pegasus->rx_tl, rx_fixup, (unsigned long) pegasus);
1280
1281         INIT_WORK(&pegasus->carrier_check, check_carrier, pegasus);
1282
1283         pegasus->intf = intf;
1284         pegasus->usb = dev;
1285         pegasus->net = net;
1286         SET_MODULE_OWNER(net);
1287         net->open = pegasus_open;
1288         net->stop = pegasus_close;
1289         net->watchdog_timeo = PEGASUS_TX_TIMEOUT;
1290         net->tx_timeout = pegasus_tx_timeout;
1291         net->do_ioctl = pegasus_ioctl;
1292         net->hard_start_xmit = pegasus_start_xmit;
1293         net->set_multicast_list = pegasus_set_multicast;
1294         net->get_stats = pegasus_netdev_stats;
1295         SET_ETHTOOL_OPS(net, &ops);
1296         pegasus->mii.dev = net;
1297         pegasus->mii.mdio_read = mdio_read;
1298         pegasus->mii.mdio_write = mdio_write;
1299         pegasus->mii.phy_id_mask = 0x1f;
1300         pegasus->mii.reg_num_mask = 0x1f;
1301         spin_lock_init(&pegasus->rx_pool_lock);
1302         pegasus->msg_enable = netif_msg_init (msg_level, NETIF_MSG_DRV
1303                                 | NETIF_MSG_PROBE | NETIF_MSG_LINK);
1304
1305         pegasus->features = usb_dev_id[dev_index].private;
1306         get_interrupt_interval(pegasus);
1307         if (reset_mac(pegasus)) {
1308                 dev_err(&intf->dev, "can't reset MAC\n");
1309                 res = -EIO;
1310                 goto out2;
1311         }
1312         set_ethernet_addr(pegasus);
1313         fill_skb_pool(pegasus);
1314         if (pegasus->features & PEGASUS_II) {
1315                 dev_info(&intf->dev, "setup Pegasus II specific registers\n");
1316                 setup_pegasus_II(pegasus);
1317         }
1318         pegasus->phy = mii_phy_probe(pegasus);
1319         if (pegasus->phy == 0xff) {
1320                 dev_warn(&intf->dev, "can't locate MII phy, using default\n");
1321                 pegasus->phy = 1;
1322         }
1323         pegasus->mii.phy_id = pegasus->phy;
1324         usb_set_intfdata(intf, pegasus);
1325         SET_NETDEV_DEV(net, &intf->dev);
1326         pegasus_reset_wol(net);
1327         res = register_netdev(net);
1328         if (res)
1329                 goto out3;
1330         queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1331                                 CARRIER_CHECK_DELAY);
1332
1333         dev_info(&intf->dev, "%s, %s, %02x:%02x:%02x:%02x:%02x:%02x\n",
1334                 net->name,
1335                 usb_dev_id[dev_index].name,
1336                 net->dev_addr [0], net->dev_addr [1],
1337                 net->dev_addr [2], net->dev_addr [3],
1338                 net->dev_addr [4], net->dev_addr [5]);
1339         return 0;
1340
1341 out3:
1342         usb_set_intfdata(intf, NULL);
1343         free_skb_pool(pegasus);
1344 out2:
1345         free_all_urbs(pegasus);
1346 out1:
1347         free_netdev(net);
1348 out:
1349         usb_put_dev(dev);
1350         return res;
1351 }
1352
1353 static void pegasus_disconnect(struct usb_interface *intf)
1354 {
1355         struct pegasus *pegasus = usb_get_intfdata(intf);
1356
1357         usb_set_intfdata(intf, NULL);
1358         if (!pegasus) {
1359                 dev_dbg(&intf->dev, "unregistering non-bound device?\n");
1360                 return;
1361         }
1362
1363         pegasus->flags |= PEGASUS_UNPLUG;
1364         cancel_delayed_work(&pegasus->carrier_check);
1365         unregister_netdev(pegasus->net);
1366         usb_put_dev(interface_to_usbdev(intf));
1367         unlink_all_urbs(pegasus);
1368         free_all_urbs(pegasus);
1369         free_skb_pool(pegasus);
1370         if (pegasus->rx_skb)
1371                 dev_kfree_skb(pegasus->rx_skb);
1372         free_netdev(pegasus->net);
1373 }
1374
1375 static int pegasus_suspend (struct usb_interface *intf, pm_message_t message)
1376 {
1377         struct pegasus *pegasus = usb_get_intfdata(intf);
1378
1379         netif_device_detach (pegasus->net);
1380         if (netif_running(pegasus->net)) {
1381                 cancel_delayed_work(&pegasus->carrier_check);
1382
1383                 usb_kill_urb(pegasus->rx_urb);
1384                 usb_kill_urb(pegasus->intr_urb);
1385         }
1386         return 0;
1387 }
1388
1389 static int pegasus_resume (struct usb_interface *intf)
1390 {
1391         struct pegasus *pegasus = usb_get_intfdata(intf);
1392
1393         netif_device_attach (pegasus->net);
1394         if (netif_running(pegasus->net)) {
1395                 pegasus->rx_urb->status = 0;
1396                 pegasus->rx_urb->actual_length = 0;
1397                 read_bulk_callback(pegasus->rx_urb, NULL);
1398
1399                 pegasus->intr_urb->status = 0;
1400                 pegasus->intr_urb->actual_length = 0;
1401                 intr_callback(pegasus->intr_urb, NULL);
1402
1403                 queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1404                                         CARRIER_CHECK_DELAY);
1405         }
1406         return 0;
1407 }
1408
1409 static struct usb_driver pegasus_driver = {
1410         .name = driver_name,
1411         .probe = pegasus_probe,
1412         .disconnect = pegasus_disconnect,
1413         .id_table = pegasus_ids,
1414         .suspend = pegasus_suspend,
1415         .resume = pegasus_resume,
1416 };
1417
1418 static void parse_id(char *id)
1419 {
1420         unsigned int vendor_id=0, device_id=0, flags=0, i=0;
1421         char *token, *name=NULL;
1422
1423         if ((token = strsep(&id, ":")) != NULL)
1424                 name = token;
1425         /* name now points to a null terminated string*/
1426         if ((token = strsep(&id, ":")) != NULL)
1427                 vendor_id = simple_strtoul(token, NULL, 16);
1428         if ((token = strsep(&id, ":")) != NULL)
1429                 device_id = simple_strtoul(token, NULL, 16);
1430         flags = simple_strtoul(id, NULL, 16);
1431         pr_info("%s: new device %s, vendor ID 0x%04x, device ID 0x%04x, flags: 0x%x\n",
1432                 driver_name, name, vendor_id, device_id, flags);
1433
1434         if (vendor_id > 0x10000 || vendor_id == 0)
1435                 return;
1436         if (device_id > 0x10000 || device_id == 0)
1437                 return;
1438
1439         for (i=0; usb_dev_id[i].name; i++);
1440         usb_dev_id[i].name = name;
1441         usb_dev_id[i].vendor = vendor_id;
1442         usb_dev_id[i].device = device_id;
1443         usb_dev_id[i].private = flags;
1444         pegasus_ids[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
1445         pegasus_ids[i].idVendor = vendor_id;
1446         pegasus_ids[i].idProduct = device_id;
1447 }
1448
1449 static int __init pegasus_init(void)
1450 {
1451         pr_info("%s: %s, " DRIVER_DESC "\n", driver_name, DRIVER_VERSION);
1452         if (devid)
1453                 parse_id(devid);
1454         pegasus_workqueue = create_singlethread_workqueue("pegasus");
1455         if (!pegasus_workqueue)
1456                 return -ENOMEM;
1457         return usb_register(&pegasus_driver);
1458 }
1459
1460 static void __exit pegasus_exit(void)
1461 {
1462         destroy_workqueue(pegasus_workqueue);
1463         usb_deregister(&pegasus_driver);
1464 }
1465
1466 module_init(pegasus_init);
1467 module_exit(pegasus_exit);