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