drivers/usb/net/pegasus.c

   1 /*
   2  *  Copyright (c) 1999-2005 Petko Manolov (petkan@users.sourceforge.net)
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  *
   8  *      ChangeLog:
   9  *              ....    Most of the time spent on reading sources & docs.
  10  *              v0.2.x  First official release for the Linux kernel.
  11  *              v0.3.0  Beutified and structured, some bugs fixed.
  12  *              v0.3.x  URBifying bulk requests and bugfixing. First relatively
  13  *                      stable release. Still can touch device's registers only
  14  *                      from top-halves.
  15  *              v0.4.0  Control messages remained unurbified are now URBs.
  16  *                      Now we can touch the HW at any time.
  17  *              v0.4.9  Control urbs again use process context to wait. Argh...
  18  *                      Some long standing bugs (enable_net_traffic) fixed.
  19  *                      Also nasty trick about resubmiting control urb from
  20  *                      interrupt context used. Please let me know how it
  21  *                      behaves. Pegasus II support added since this version.
  22  *                      TODO: suppressing HCD warnings spewage on disconnect.
  23  *              v0.4.13 Ethernet address is now set at probe(), not at open()
  24  *                      time as this seems to break dhcpd.
  25  *              v0.5.0  branch to 2.5.x kernels
  26  *              v0.5.1  ethtool support added
  27  *              v0.5.5  rx socket buffers are in a pool and the their allocation
  28  *                      is out of the interrupt routine.
  29  */
  30
  31 #undef  DEBUG
  32
  33 #include <linux/sched.h>
  34 #include <linux/slab.h>
  35 #include <linux/init.h>
  36 #include <linux/delay.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/etherdevice.h>
  39 #include <linux/ethtool.h>
  40 #include <linux/mii.h>
  41 #include <linux/usb.h>
  42 #include <linux/module.h>
  43 #include <asm/byteorder.h>
  44 #include <asm/uaccess.h>
  45 #include "pegasus.h"
  46
  47 /*
  48  * Version Information
  49  */
  50 #define DRIVER_VERSION "v0.6.12 (2005/01/13)"
  51 #define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>"
  52 #define DRIVER_DESC "Pegasus/Pegasus II USB Ethernet driver"
  53
  54 static const char driver_name[] = "pegasus";
  55
  56 #undef  PEGASUS_WRITE_EEPROM
  57 #define BMSR_MEDIA      (BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | \
  58                         BMSR_100FULL | BMSR_ANEGCAPABLE)
  59
  60 static int loopback = 0;
  61 static int mii_mode = 0;
  62
  63 static struct usb_eth_dev usb_dev_id[] = {
  64 #define PEGASUS_DEV(pn, vid, pid, flags)        \
  65         {.name = pn, .vendor = vid, .device = pid, .private = flags},
  66 #include "pegasus.h"
  67 #undef  PEGASUS_DEV
  68         {NULL, 0, 0, 0}
  69 };
  70
  71 static struct usb_device_id pegasus_ids[] = {
  72 #define PEGASUS_DEV(pn, vid, pid, flags) \
  73         {.match_flags = USB_DEVICE_ID_MATCH_DEVICE, .idVendor = vid, .idProduct = pid},
  74 #include "pegasus.h"
  75 #undef  PEGASUS_DEV
  76         {}
  77 };
  78
  79 MODULE_AUTHOR(DRIVER_AUTHOR);
  80 MODULE_DESCRIPTION(DRIVER_DESC);
  81 MODULE_LICENSE("GPL");
  82 module_param(loopback, bool, 0);
  83 module_param(mii_mode, bool, 0);
  84 MODULE_PARM_DESC(loopback, "Enable MAC loopback mode (bit 0)");
  85 MODULE_PARM_DESC(mii_mode, "Enable HomePNA mode (bit 0),default=MII mode = 0");
  86
  87 /* use ethtool to change the level for any given device */
  88 static int msg_level = -1;
  89 module_param (msg_level, int, 0);
  90 MODULE_PARM_DESC (msg_level, "Override default message level");
  91
  92 MODULE_DEVICE_TABLE(usb, pegasus_ids);
  93
  94 static int update_eth_regs_async(pegasus_t *);
  95 /* Aargh!!! I _really_ hate such tweaks */
  96 static void ctrl_callback(struct urb *urb, struct pt_regs *regs)
  97 {
  98         pegasus_t *pegasus = urb->context;
  99
 100         if (!pegasus)
 101                 return;
 102
 103         switch (urb->status) {
 104         case 0:
 105                 if (pegasus->flags & ETH_REGS_CHANGE) {
 106                         pegasus->flags &= ~ETH_REGS_CHANGE;
 107                         pegasus->flags |= ETH_REGS_CHANGED;
 108                         update_eth_regs_async(pegasus);
 109                         return;
 110                 }
 111                 break;
 112         case -EINPROGRESS:
 113                 return;
 114         case -ENOENT:
 115                 break;
 116         default:
 117                 if (netif_msg_drv(pegasus))
 118                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 119                                 __FUNCTION__, urb->status);
 120         }
 121         pegasus->flags &= ~ETH_REGS_CHANGED;
 122         wake_up(&pegasus->ctrl_wait);
 123 }
 124
 125 static int get_registers(pegasus_t * pegasus, __u16 indx, __u16 size,
 126                          void *data)
 127 {
 128         int ret;
 129         char *buffer;
 130         DECLARE_WAITQUEUE(wait, current);
 131
 132         buffer = kmalloc(size, GFP_KERNEL);
 133         if (!buffer) {
 134                 if (netif_msg_drv(pegasus))
 135                         dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
 136                                         __FUNCTION__);
 137                 return -ENOMEM;
 138         }
 139         add_wait_queue(&pegasus->ctrl_wait, &wait);
 140         set_current_state(TASK_UNINTERRUPTIBLE);
 141         while (pegasus->flags & ETH_REGS_CHANGED)
 142                 schedule();
 143         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 144         set_current_state(TASK_RUNNING);
 145
 146         pegasus->dr.bRequestType = PEGASUS_REQT_READ;
 147         pegasus->dr.bRequest = PEGASUS_REQ_GET_REGS;
 148         pegasus->dr.wValue = cpu_to_le16(0);
 149         pegasus->dr.wIndex = cpu_to_le16p(&indx);
 150         pegasus->dr.wLength = cpu_to_le16p(&size);
 151         pegasus->ctrl_urb->transfer_buffer_length = size;
 152
 153         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 154                              usb_rcvctrlpipe(pegasus->usb, 0),
 155                              (char *) &pegasus->dr,
 156                              buffer, size, ctrl_callback, pegasus);
 157
 158         add_wait_queue(&pegasus->ctrl_wait, &wait);
 159         set_current_state(TASK_UNINTERRUPTIBLE);
 160
 161         /* using ATOMIC, we'd never wake up if we slept */
 162         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 163                 if (netif_msg_drv(pegasus))
 164                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 165                                         __FUNCTION__, ret);
 166                 goto out;
 167         }
 168
 169         schedule();
 170 out:
 171         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 172         memcpy(data, buffer, size);
 173         kfree(buffer);
 174
 175         return ret;
 176 }
 177
 178 static int set_registers(pegasus_t * pegasus, __u16 indx, __u16 size,
 179                          void *data)
 180 {
 181         int ret;
 182         char *buffer;
 183         DECLARE_WAITQUEUE(wait, current);
 184
 185         buffer = kmalloc(size, GFP_KERNEL);
 186         if (!buffer) {
 187                 if (netif_msg_drv(pegasus))
 188                         dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
 189                                         __FUNCTION__);
 190                 return -ENOMEM;
 191         }
 192         memcpy(buffer, data, size);
 193
 194         add_wait_queue(&pegasus->ctrl_wait, &wait);
 195         set_current_state(TASK_UNINTERRUPTIBLE);
 196         while (pegasus->flags & ETH_REGS_CHANGED)
 197                 schedule();
 198         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 199         set_current_state(TASK_RUNNING);
 200
 201         pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
 202         pegasus->dr.bRequest = PEGASUS_REQ_SET_REGS;
 203         pegasus->dr.wValue = cpu_to_le16(0);
 204         pegasus->dr.wIndex = cpu_to_le16p(&indx);
 205         pegasus->dr.wLength = cpu_to_le16p(&size);
 206         pegasus->ctrl_urb->transfer_buffer_length = size;
 207
 208         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 209                              usb_sndctrlpipe(pegasus->usb, 0),
 210                              (char *) &pegasus->dr,
 211                              buffer, size, ctrl_callback, pegasus);
 212
 213         add_wait_queue(&pegasus->ctrl_wait, &wait);
 214         set_current_state(TASK_UNINTERRUPTIBLE);
 215
 216         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 217                 if (netif_msg_drv(pegasus))
 218                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 219                                         __FUNCTION__, ret);
 220                 goto out;
 221         }
 222
 223         schedule();
 224 out:
 225         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 226         kfree(buffer);
 227
 228         return ret;
 229 }
 230
 231 static int set_register(pegasus_t * pegasus, __u16 indx, __u8 data)
 232 {
 233         int ret;
 234         char *tmp;
 235         DECLARE_WAITQUEUE(wait, current);
 236
 237         tmp = kmalloc(1, GFP_KERNEL);
 238         if (!tmp) {
 239                 if (netif_msg_drv(pegasus))
 240                         dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
 241                                         __FUNCTION__);
 242                 return -ENOMEM;
 243         }
 244         memcpy(tmp, &data, 1);
 245         add_wait_queue(&pegasus->ctrl_wait, &wait);
 246         set_current_state(TASK_UNINTERRUPTIBLE);
 247         while (pegasus->flags & ETH_REGS_CHANGED)
 248                 schedule();
 249         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 250         set_current_state(TASK_RUNNING);
 251
 252         pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
 253         pegasus->dr.bRequest = PEGASUS_REQ_SET_REG;
 254         pegasus->dr.wValue = cpu_to_le16(data);
 255         pegasus->dr.wIndex = cpu_to_le16p(&indx);
 256         pegasus->dr.wLength = cpu_to_le16(1);
 257         pegasus->ctrl_urb->transfer_buffer_length = 1;
 258
 259         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 260                              usb_sndctrlpipe(pegasus->usb, 0),
 261                              (char *) &pegasus->dr,
 262                              &tmp, 1, ctrl_callback, pegasus);
 263
 264         add_wait_queue(&pegasus->ctrl_wait, &wait);
 265         set_current_state(TASK_UNINTERRUPTIBLE);
 266
 267         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 268                 if (netif_msg_drv(pegasus))
 269                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 270                                         __FUNCTION__, ret);
 271                 goto out;
 272         }
 273
 274         schedule();
 275 out:
 276         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 277         kfree(tmp);
 278
 279         return ret;
 280 }
 281
 282 static int update_eth_regs_async(pegasus_t * pegasus)
 283 {
 284         int ret;
 285
 286         pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
 287         pegasus->dr.bRequest = PEGASUS_REQ_SET_REGS;
 288         pegasus->dr.wValue = 0;
 289         pegasus->dr.wIndex = cpu_to_le16(EthCtrl0);
 290         pegasus->dr.wLength = cpu_to_le16(3);
 291         pegasus->ctrl_urb->transfer_buffer_length = 3;
 292
 293         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 294                              usb_sndctrlpipe(pegasus->usb, 0),
 295                              (char *) &pegasus->dr,
 296                              pegasus->eth_regs, 3, ctrl_callback, pegasus);
 297
 298         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC)))
 299                 if (netif_msg_drv(pegasus))
 300                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 301                                         __FUNCTION__, ret);
 302
 303         return ret;
 304 }
 305
 306 static int read_mii_word(pegasus_t * pegasus, __u8 phy, __u8 indx, __u16 * regd)
 307 {
 308         int i;
 309         __u8 data[4] = { phy, 0, 0, indx };
 310         __le16 regdi;
 311         int ret;
 312
 313         ret = set_register(pegasus, PhyCtrl, 0);
 314         ret = set_registers(pegasus, PhyAddr, sizeof (data), data);
 315         ret = set_register(pegasus, PhyCtrl, (indx | PHY_READ));
 316         for (i = 0; i < REG_TIMEOUT; i++) {
 317                 ret = get_registers(pegasus, PhyCtrl, 1, data);
 318                 if (data[0] & PHY_DONE)
 319                         break;
 320         }
 321         if (i < REG_TIMEOUT) {
 322                 ret = get_registers(pegasus, PhyData, 2, &regdi);
 323                 *regd = le16_to_cpu(regdi);
 324                 return 1;
 325         }
 326         if (netif_msg_drv(pegasus))
 327                 dev_warn(&pegasus->intf->dev, "fail %s\n", __FUNCTION__);
 328
 329         return 0;
 330 }
 331
 332 static int mdio_read(struct net_device *dev, int phy_id, int loc)
 333 {
 334         pegasus_t *pegasus = (pegasus_t *) netdev_priv(dev);
 335         u16 res;
 336
 337         read_mii_word(pegasus, phy_id, loc, &res);
 338         return (int)res;
 339 }
 340
 341 static int write_mii_word(pegasus_t * pegasus, __u8 phy, __u8 indx, __u16 regd)
 342 {
 343         int i;
 344         __u8 data[4] = { phy, 0, 0, indx };
 345         int ret;
 346
 347         data[1] = (u8) regd;
 348         data[2] = (u8) (regd >> 8);
 349         ret = set_register(pegasus, PhyCtrl, 0);
 350         ret = set_registers(pegasus, PhyAddr, sizeof(data), data);
 351         ret = set_register(pegasus, PhyCtrl, (indx | PHY_WRITE));
 352         for (i = 0; i < REG_TIMEOUT; i++) {
 353                 ret = get_registers(pegasus, PhyCtrl, 1, data);
 354                 if (data[0] & PHY_DONE)
 355                         break;
 356         }
 357         if (i < REG_TIMEOUT)
 358                 return 0;
 359
 360         if (netif_msg_drv(pegasus))
 361                 dev_warn(&pegasus->intf->dev, "fail %s\n", __FUNCTION__);
 362         return 1;
 363 }
 364
 365 static void mdio_write(struct net_device *dev, int phy_id, int loc, int val)
 366 {
 367         pegasus_t *pegasus = (pegasus_t *) netdev_priv(dev);
 368
 369         write_mii_word(pegasus, phy_id, loc, val);
 370 }
 371
 372 static int read_eprom_word(pegasus_t * pegasus, __u8 index, __u16 * retdata)
 373 {
 374         int i;
 375         __u8 tmp;
 376         __le16 retdatai;
 377         int ret;
 378
 379         ret = set_register(pegasus, EpromCtrl, 0);
 380         ret = set_register(pegasus, EpromOffset, index);
 381         ret = set_register(pegasus, EpromCtrl, EPROM_READ);
 382
 383         for (i = 0; i < REG_TIMEOUT; i++) {
 384                 ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
 385                 if (tmp & EPROM_DONE)
 386                         break;
 387         }
 388         if (i < REG_TIMEOUT) {
 389                 ret = get_registers(pegasus, EpromData, 2, &retdatai);
 390                 *retdata = le16_to_cpu(retdatai);
 391                 return 0;
 392         }
 393
 394         if (netif_msg_drv(pegasus))
 395                 dev_warn(&pegasus->intf->dev, "fail %s\n", __FUNCTION__);
 396         return -1;
 397 }
 398
 399 #ifdef  PEGASUS_WRITE_EEPROM
 400 static inline void enable_eprom_write(pegasus_t * pegasus)
 401 {
 402         __u8 tmp;
 403         int ret;
 404
 405         ret = get_registers(pegasus, EthCtrl2, 1, &tmp);
 406         ret = set_register(pegasus, EthCtrl2, tmp | EPROM_WR_ENABLE);
 407 }
 408
 409 static inline void disable_eprom_write(pegasus_t * pegasus)
 410 {
 411         __u8 tmp;
 412         int ret;
 413
 414         ret = get_registers(pegasus, EthCtrl2, 1, &tmp);
 415         ret = set_register(pegasus, EpromCtrl, 0);
 416         ret = set_register(pegasus, EthCtrl2, tmp & ~EPROM_WR_ENABLE);
 417 }
 418
 419 static int write_eprom_word(pegasus_t * pegasus, __u8 index, __u16 data)
 420 {
 421         int i;
 422         __u8 tmp, d[4] = { 0x3f, 0, 0, EPROM_WRITE };
 423         int ret;
 424
 425         ret = set_registers(pegasus, EpromOffset, 4, d);
 426         enable_eprom_write(pegasus);
 427         ret = set_register(pegasus, EpromOffset, index);
 428         ret = set_registers(pegasus, EpromData, 2, &data);
 429         ret = set_register(pegasus, EpromCtrl, EPROM_WRITE);
 430
 431         for (i = 0; i < REG_TIMEOUT; i++) {
 432                 ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
 433                 if (tmp & EPROM_DONE)
 434                         break;
 435         }
 436         disable_eprom_write(pegasus);
 437         if (i < REG_TIMEOUT)
 438                 return 0;
 439         if (netif_msg_drv(pegasus))
 440                 dev_warn(&pegasus->intf->dev, "fail %s\n", __FUNCTION__);
 441         return -1;
 442 }
 443 #endif                          /* PEGASUS_WRITE_EEPROM */
 444
 445 static inline void get_node_id(pegasus_t * pegasus, __u8 * id)
 446 {
 447         int i;
 448         __u16 w16;
 449
 450         for (i = 0; i < 3; i++) {
 451                 read_eprom_word(pegasus, i, &w16);
 452                 ((__le16 *) id)[i] = cpu_to_le16p(&w16);
 453         }
 454 }
 455
 456 static void set_ethernet_addr(pegasus_t * pegasus)
 457 {
 458         __u8 node_id[6];
 459         int ret;
 460
 461         get_node_id(pegasus, node_id);
 462         ret = set_registers(pegasus, EthID, sizeof (node_id), node_id);
 463         memcpy(pegasus->net->dev_addr, node_id, sizeof (node_id));
 464 }
 465
 466 static inline int reset_mac(pegasus_t * pegasus)
 467 {
 468         __u8 data = 0x8;
 469         int i;
 470         int ret;
 471
 472         ret = set_register(pegasus, EthCtrl1, data);
 473         for (i = 0; i < REG_TIMEOUT; i++) {
 474                 ret = get_registers(pegasus, EthCtrl1, 1, &data);
 475                 if (~data & 0x08) {
 476                         if (loopback & 1)
 477                                 break;
 478                         if (mii_mode && (pegasus->features & HAS_HOME_PNA))
 479                                 ret = set_register(pegasus, Gpio1, 0x34);
 480                         else
 481                                 ret = set_register(pegasus, Gpio1, 0x26);
 482                         ret = set_register(pegasus, Gpio0, pegasus->features);
 483                         ret = set_register(pegasus, Gpio0, DEFAULT_GPIO_SET);
 484                         break;
 485                 }
 486         }
 487         if (i == REG_TIMEOUT)
 488                 return 1;
 489
 490         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
 491             usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
 492                 ret = set_register(pegasus, Gpio0, 0x24);
 493                 ret = set_register(pegasus, Gpio0, 0x26);
 494         }
 495         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_ELCON) {
 496                 __u16 auxmode;
 497                 read_mii_word(pegasus, 3, 0x1b, &auxmode);
 498                 write_mii_word(pegasus, 3, 0x1b, auxmode | 4);
 499         }
 500
 501         return 0;
 502 }
 503
 504 static int enable_net_traffic(struct net_device *dev, struct usb_device *usb)
 505 {
 506         __u16 linkpart;
 507         __u8 data[4];
 508         pegasus_t *pegasus = netdev_priv(dev);
 509         int ret;
 510
 511         read_mii_word(pegasus, pegasus->phy, MII_LPA, &linkpart);
 512         data[0] = 0xc9;
 513         data[1] = 0;
 514         if (linkpart & (ADVERTISE_100FULL | ADVERTISE_10FULL))
 515                 data[1] |= 0x20;        /* set full duplex */
 516         if (linkpart & (ADVERTISE_100FULL | ADVERTISE_100HALF))
 517                 data[1] |= 0x10;        /* set 100 Mbps */
 518         if (mii_mode)
 519                 data[1] = 0;
 520         data[2] = (loopback & 1) ? 0x09 : 0x01;
 521
 522         memcpy(pegasus->eth_regs, data, sizeof (data));
 523         ret = set_registers(pegasus, EthCtrl0, 3, data);
 524
 525         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
 526             usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
 527                 u16 auxmode;
 528                 read_mii_word(pegasus, 0, 0x1b, &auxmode);
 529                 write_mii_word(pegasus, 0, 0x1b, auxmode | 4);
 530         }
 531
 532         return 0;
 533 }
 534
 535 static void fill_skb_pool(pegasus_t * pegasus)
 536 {
 537         int i;
 538
 539         for (i = 0; i < RX_SKBS; i++) {
 540                 if (pegasus->rx_pool[i])
 541                         continue;
 542                 pegasus->rx_pool[i] = dev_alloc_skb(PEGASUS_MTU + 2);
 543                 /*
 544                  ** we give up if the allocation fail. the tasklet will be
 545                  ** rescheduled again anyway...
 546                  */
 547                 if (pegasus->rx_pool[i] == NULL)
 548                         return;
 549                 pegasus->rx_pool[i]->dev = pegasus->net;
 550                 skb_reserve(pegasus->rx_pool[i], 2);
 551         }
 552 }
 553
 554 static void free_skb_pool(pegasus_t * pegasus)
 555 {
 556         int i;
 557
 558         for (i = 0; i < RX_SKBS; i++) {
 559                 if (pegasus->rx_pool[i]) {
 560                         dev_kfree_skb(pegasus->rx_pool[i]);
 561                         pegasus->rx_pool[i] = NULL;
 562                 }
 563         }
 564 }
 565
 566 static inline struct sk_buff *pull_skb(pegasus_t * pegasus)
 567 {
 568         int i;
 569         struct sk_buff *skb;
 570
 571         for (i = 0; i < RX_SKBS; i++) {
 572                 if (likely(pegasus->rx_pool[i] != NULL)) {
 573                         skb = pegasus->rx_pool[i];
 574                         pegasus->rx_pool[i] = NULL;
 575                         return skb;
 576                 }
 577         }
 578         return NULL;
 579 }
 580
 581 static void read_bulk_callback(struct urb *urb, struct pt_regs *regs)
 582 {
 583         pegasus_t *pegasus = urb->context;
 584         struct net_device *net;
 585         int rx_status, count = urb->actual_length;
 586         u8 *buf = urb->transfer_buffer;
 587         __u16 pkt_len;
 588
 589         if (!pegasus)
 590                 return;
 591
 592         net = pegasus->net;
 593         if (!netif_device_present(net) || !netif_running(net))
 594                 return;
 595
 596         switch (urb->status) {
 597         case 0:
 598                 break;
 599         case -ETIMEDOUT:
 600                 if (netif_msg_rx_err(pegasus))
 601                         pr_debug("%s: reset MAC\n", net->name);
 602                 pegasus->flags &= ~PEGASUS_RX_BUSY;
 603                 break;
 604         case -EPIPE:            /* stall, or disconnect from TT */
 605                 /* FIXME schedule work to clear the halt */
 606                 if (netif_msg_rx_err(pegasus))
 607                         printk(KERN_WARNING "%s: no rx stall recovery\n",
 608                                         net->name);
 609                 return;
 610         case -ENOENT:
 611         case -ECONNRESET:
 612         case -ESHUTDOWN:
 613                 if (netif_msg_ifdown(pegasus))
 614                         pr_debug("%s: rx unlink, %d\n", net->name, urb->status);
 615                 return;
 616         default:
 617                 if (netif_msg_rx_err(pegasus))
 618                         pr_debug("%s: RX status %d\n", net->name, urb->status);
 619                 goto goon;
 620         }
 621
 622         if (!count || count < 4)
 623                 goto goon;
 624
 625         rx_status = buf[count - 2];
 626         if (rx_status & 0x1e) {
 627                 if (netif_msg_rx_err(pegasus))
 628                         pr_debug("%s: RX packet error %x\n",
 629                                         net->name, rx_status);
 630                 pegasus->stats.rx_errors++;
 631                 if (rx_status & 0x06)   // long or runt
 632                         pegasus->stats.rx_length_errors++;
 633                 if (rx_status & 0x08)
 634                         pegasus->stats.rx_crc_errors++;
 635                 if (rx_status & 0x10)   // extra bits
 636                         pegasus->stats.rx_frame_errors++;
 637                 goto goon;
 638         }
 639         if (pegasus->chip == 0x8513) {
 640                 pkt_len = le32_to_cpu(*(__le32 *)urb->transfer_buffer);
 641                 pkt_len &= 0x0fff;
 642                 pegasus->rx_skb->data += 2;
 643         } else {
 644                 pkt_len = buf[count - 3] << 8;
 645                 pkt_len += buf[count - 4];
 646                 pkt_len &= 0xfff;
 647                 pkt_len -= 8;
 648         }
 649
 650         /*
 651          * at this point we are sure pegasus->rx_skb != NULL
 652          * so we go ahead and pass up the packet.
 653          */
 654         skb_put(pegasus->rx_skb, pkt_len);
 655         pegasus->rx_skb->protocol = eth_type_trans(pegasus->rx_skb, net);
 656         netif_rx(pegasus->rx_skb);
 657         pegasus->stats.rx_packets++;
 658         pegasus->stats.rx_bytes += pkt_len;
 659
 660         if (pegasus->flags & PEGASUS_UNPLUG)
 661                 return;
 662
 663         spin_lock(&pegasus->rx_pool_lock);
 664         pegasus->rx_skb = pull_skb(pegasus);
 665         spin_unlock(&pegasus->rx_pool_lock);
 666
 667         if (pegasus->rx_skb == NULL)
 668                 goto tl_sched;
 669 goon:
 670         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
 671                           usb_rcvbulkpipe(pegasus->usb, 1),
 672                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
 673                           read_bulk_callback, pegasus);
 674         if (usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC)) {
 675                 pegasus->flags |= PEGASUS_RX_URB_FAIL;
 676                 goto tl_sched;
 677         } else {
 678                 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
 679         }
 680
 681         return;
 682
 683 tl_sched:
 684         tasklet_schedule(&pegasus->rx_tl);
 685 }
 686
 687 static void rx_fixup(unsigned long data)
 688 {
 689         pegasus_t *pegasus;
 690         unsigned long flags;
 691
 692         pegasus = (pegasus_t *) data;
 693         if (pegasus->flags & PEGASUS_UNPLUG)
 694                 return;
 695
 696         spin_lock_irqsave(&pegasus->rx_pool_lock, flags);
 697         fill_skb_pool(pegasus);
 698         if (pegasus->flags & PEGASUS_RX_URB_FAIL)
 699                 if (pegasus->rx_skb)
 700                         goto try_again;
 701         if (pegasus->rx_skb == NULL) {
 702                 pegasus->rx_skb = pull_skb(pegasus);
 703         }
 704         if (pegasus->rx_skb == NULL) {
 705                 if (netif_msg_rx_err(pegasus))
 706                         printk(KERN_WARNING "%s: low on memory\n",
 707                                         pegasus->net->name);
 708                 tasklet_schedule(&pegasus->rx_tl);
 709                 goto done;
 710         }
 711         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
 712                           usb_rcvbulkpipe(pegasus->usb, 1),
 713                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
 714                           read_bulk_callback, pegasus);
 715 try_again:
 716         if (usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC)) {
 717                 pegasus->flags |= PEGASUS_RX_URB_FAIL;
 718                 tasklet_schedule(&pegasus->rx_tl);
 719         } else {
 720                 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
 721         }
 722 done:
 723         spin_unlock_irqrestore(&pegasus->rx_pool_lock, flags);
 724 }
 725
 726 static void write_bulk_callback(struct urb *urb, struct pt_regs *regs)
 727 {
 728         pegasus_t *pegasus = urb->context;
 729         struct net_device *net = pegasus->net;
 730
 731         if (!pegasus)
 732                 return;
 733
 734         if (!netif_device_present(net) || !netif_running(net))
 735                 return;
 736
 737         switch (urb->status) {
 738         case -EPIPE:
 739                 /* FIXME schedule_work() to clear the tx halt */
 740                 netif_stop_queue(net);
 741                 if (netif_msg_tx_err(pegasus))
 742                         printk(KERN_WARNING "%s: no tx stall recovery\n",
 743                                         net->name);
 744                 return;
 745         case -ENOENT:
 746         case -ECONNRESET:
 747         case -ESHUTDOWN:
 748                 if (netif_msg_ifdown(pegasus))
 749                         pr_debug("%s: tx unlink, %d\n", net->name, urb->status);
 750                 return;
 751         default:
 752                 if (netif_msg_tx_err(pegasus))
 753                         pr_info("%s: TX status %d\n", net->name, urb->status);
 754                 /* FALL THROUGH */
 755         case 0:
 756                 break;
 757         }
 758
 759         net->trans_start = jiffies;
 760         netif_wake_queue(net);
 761 }
 762
 763 static void intr_callback(struct urb *urb, struct pt_regs *regs)
 764 {
 765         pegasus_t *pegasus = urb->context;
 766         struct net_device *net;
 767         int status;
 768
 769         if (!pegasus)
 770                 return;
 771         net = pegasus->net;
 772
 773         switch (urb->status) {
 774         case 0:
 775                 break;
 776         case -ECONNRESET:       /* unlink */
 777         case -ENOENT:
 778         case -ESHUTDOWN:
 779                 return;
 780         default:
 781                 /* some Pegasus-I products report LOTS of data
 782                  * toggle errors... avoid log spamming
 783                  */
 784                 if (netif_msg_timer(pegasus))
 785                         pr_debug("%s: intr status %d\n", net->name,
 786                                         urb->status);
 787         }
 788
 789         if (urb->actual_length >= 6) {
 790                 u8      * d = urb->transfer_buffer;
 791
 792                 /* byte 0 == tx_status1, reg 2B */
 793                 if (d[0] & (TX_UNDERRUN|EXCESSIVE_COL
 794                                         |LATE_COL|JABBER_TIMEOUT)) {
 795                         pegasus->stats.tx_errors++;
 796                         if (d[0] & TX_UNDERRUN)
 797                                 pegasus->stats.tx_fifo_errors++;
 798                         if (d[0] & (EXCESSIVE_COL | JABBER_TIMEOUT))
 799                                 pegasus->stats.tx_aborted_errors++;
 800                         if (d[0] & LATE_COL)
 801                                 pegasus->stats.tx_window_errors++;
 802                 }
 803
 804                 /* d[5].LINK_STATUS lies on some adapters.
 805                  * d[0].NO_CARRIER kicks in only with failed TX.
 806                  * ... so monitoring with MII may be safest.
 807                  */
 808                 if (d[0] & NO_CARRIER)
 809                         netif_carrier_off(net);
 810                 else
 811                         netif_carrier_on(net);
 812
 813                 /* bytes 3-4 == rx_lostpkt, reg 2E/2F */
 814                 pegasus->stats.rx_missed_errors += ((d[3] & 0x7f) << 8) | d[4];
 815         }
 816
 817         status = usb_submit_urb(urb, SLAB_ATOMIC);
 818         if (status && netif_msg_timer(pegasus))
 819                 printk(KERN_ERR "%s: can't resubmit interrupt urb, %d\n",
 820                                 net->name, status);
 821 }
 822
 823 static void pegasus_tx_timeout(struct net_device *net)
 824 {
 825         pegasus_t *pegasus = netdev_priv(net);
 826         if (netif_msg_timer(pegasus))
 827                 printk(KERN_WARNING "%s: tx timeout\n", net->name);
 828         pegasus->tx_urb->transfer_flags |= URB_ASYNC_UNLINK;
 829         usb_unlink_urb(pegasus->tx_urb);
 830         pegasus->stats.tx_errors++;
 831 }
 832
 833 static int pegasus_start_xmit(struct sk_buff *skb, struct net_device *net)
 834 {
 835         pegasus_t *pegasus = netdev_priv(net);
 836         int count = ((skb->len + 2) & 0x3f) ? skb->len + 2 : skb->len + 3;
 837         int res;
 838         __u16 l16 = skb->len;
 839
 840         netif_stop_queue(net);
 841
 842         ((__le16 *) pegasus->tx_buff)[0] = cpu_to_le16(l16);
 843         memcpy(pegasus->tx_buff + 2, skb->data, skb->len);
 844         usb_fill_bulk_urb(pegasus->tx_urb, pegasus->usb,
 845                           usb_sndbulkpipe(pegasus->usb, 2),
 846                           pegasus->tx_buff, count,
 847                           write_bulk_callback, pegasus);
 848         if ((res = usb_submit_urb(pegasus->tx_urb, GFP_ATOMIC))) {
 849                 if (netif_msg_tx_err(pegasus))
 850                         printk(KERN_WARNING "%s: fail tx, %d\n",
 851                                         net->name, res);
 852                 switch (res) {
 853                 case -EPIPE:            /* stall, or disconnect from TT */
 854                         /* cleanup should already have been scheduled */
 855                         break;
 856                 case -ENODEV:           /* disconnect() upcoming */
 857                         break;
 858                 default:
 859                         pegasus->stats.tx_errors++;
 860                         netif_start_queue(net);
 861                 }
 862         } else {
 863                 pegasus->stats.tx_packets++;
 864                 pegasus->stats.tx_bytes += skb->len;
 865                 net->trans_start = jiffies;
 866         }
 867         dev_kfree_skb(skb);
 868
 869         return 0;
 870 }
 871
 872 static struct net_device_stats *pegasus_netdev_stats(struct net_device *dev)
 873 {
 874         return &((pegasus_t *) netdev_priv(dev))->stats;
 875 }
 876
 877 static inline void disable_net_traffic(pegasus_t * pegasus)
 878 {
 879         int tmp = 0;
 880         int ret;
 881
 882         ret = set_registers(pegasus, EthCtrl0, 2, &tmp);
 883 }
 884
 885 static inline void get_interrupt_interval(pegasus_t * pegasus)
 886 {
 887         __u8 data[2];
 888
 889         read_eprom_word(pegasus, 4, (__u16 *) data);
 890         if (data[1] < 0x80) {
 891                 if (netif_msg_timer(pegasus))
 892                         dev_info(&pegasus->intf->dev,
 893                                 "intr interval changed from %ums to %ums\n",
 894                                 data[1], 0x80);
 895                 data[1] = 0x80;
 896 #ifdef  PEGASUS_WRITE_EEPROM
 897                 write_eprom_word(pegasus, 4, *(__u16 *) data);
 898 #endif
 899         }
 900         pegasus->intr_interval = data[1];
 901 }
 902
 903 static void set_carrier(struct net_device *net)
 904 {
 905         pegasus_t *pegasus = netdev_priv(net);
 906         u16 tmp;
 907
 908         if (read_mii_word(pegasus, pegasus->phy, MII_BMSR, &tmp))
 909                 return;
 910         if (tmp & BMSR_LSTATUS)
 911                 netif_carrier_on(net);
 912         else
 913                 netif_carrier_off(net);
 914 }
 915
 916 static void free_all_urbs(pegasus_t * pegasus)
 917 {
 918         usb_free_urb(pegasus->intr_urb);
 919         usb_free_urb(pegasus->tx_urb);
 920         usb_free_urb(pegasus->rx_urb);
 921         usb_free_urb(pegasus->ctrl_urb);
 922 }
 923
 924 static void unlink_all_urbs(pegasus_t * pegasus)
 925 {
 926         usb_kill_urb(pegasus->intr_urb);
 927         usb_kill_urb(pegasus->tx_urb);
 928         usb_kill_urb(pegasus->rx_urb);
 929         usb_kill_urb(pegasus->ctrl_urb);
 930 }
 931
 932 static int alloc_urbs(pegasus_t * pegasus)
 933 {
 934         pegasus->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
 935         if (!pegasus->ctrl_urb) {
 936                 return 0;
 937         }
 938         pegasus->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 939         if (!pegasus->rx_urb) {
 940                 usb_free_urb(pegasus->ctrl_urb);
 941                 return 0;
 942         }
 943         pegasus->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 944         if (!pegasus->tx_urb) {
 945                 usb_free_urb(pegasus->rx_urb);
 946                 usb_free_urb(pegasus->ctrl_urb);
 947                 return 0;
 948         }
 949         pegasus->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
 950         if (!pegasus->intr_urb) {
 951                 usb_free_urb(pegasus->tx_urb);
 952                 usb_free_urb(pegasus->rx_urb);
 953                 usb_free_urb(pegasus->ctrl_urb);
 954                 return 0;
 955         }
 956
 957         return 1;
 958 }
 959
 960 static int pegasus_open(struct net_device *net)
 961 {
 962         pegasus_t *pegasus = netdev_priv(net);
 963         int res;
 964
 965         if (pegasus->rx_skb == NULL)
 966                 pegasus->rx_skb = pull_skb(pegasus);
 967         /*
 968          ** Note: no point to free the pool.  it is empty :-)
 969          */
 970         if (!pegasus->rx_skb)
 971                 return -ENOMEM;
 972
 973         res = set_registers(pegasus, EthID, 6, net->dev_addr);
 974
 975         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
 976                           usb_rcvbulkpipe(pegasus->usb, 1),
 977                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
 978                           read_bulk_callback, pegasus);
 979         if ((res = usb_submit_urb(pegasus->rx_urb, GFP_KERNEL))) {
 980                 if (netif_msg_ifup(pegasus))
 981                         pr_debug("%s: failed rx_urb, %d", net->name, res);
 982                 goto exit;
 983         }
 984
 985         usb_fill_int_urb(pegasus->intr_urb, pegasus->usb,
 986                          usb_rcvintpipe(pegasus->usb, 3),
 987                          pegasus->intr_buff, sizeof (pegasus->intr_buff),
 988                          intr_callback, pegasus, pegasus->intr_interval);
 989         if ((res = usb_submit_urb(pegasus->intr_urb, GFP_KERNEL))) {
 990                 if (netif_msg_ifup(pegasus))
 991                         pr_debug("%s: failed intr_urb, %d\n", net->name, res);
 992                 usb_kill_urb(pegasus->rx_urb);
 993                 goto exit;
 994         }
 995         if ((res = enable_net_traffic(net, pegasus->usb))) {
 996                 if (netif_msg_ifup(pegasus))
 997                         pr_debug("%s: can't enable_net_traffic() - %d\n",
 998                                         net->name, res);
 999                 res = -EIO;
1000                 usb_kill_urb(pegasus->rx_urb);
1001                 usb_kill_urb(pegasus->intr_urb);
1002                 free_skb_pool(pegasus);
1003                 goto exit;
1004         }
1005         set_carrier(net);
1006         netif_start_queue(net);
1007         if (netif_msg_ifup(pegasus))
1008                 pr_debug("%s: open\n", net->name);
1009         res = 0;
1010 exit:
1011         return res;
1012 }
1013
1014 static int pegasus_close(struct net_device *net)
1015 {
1016         pegasus_t *pegasus = netdev_priv(net);
1017
1018         netif_stop_queue(net);
1019         if (!(pegasus->flags & PEGASUS_UNPLUG))
1020                 disable_net_traffic(pegasus);
1021         tasklet_kill(&pegasus->rx_tl);
1022         unlink_all_urbs(pegasus);
1023
1024         return 0;
1025 }
1026
1027 static void pegasus_get_drvinfo(struct net_device *dev,
1028                                 struct ethtool_drvinfo *info)
1029 {
1030         pegasus_t *pegasus = netdev_priv(dev);
1031         strncpy(info->driver, driver_name, sizeof (info->driver) - 1);
1032         strncpy(info->version, DRIVER_VERSION, sizeof (info->version) - 1);
1033         usb_make_path(pegasus->usb, info->bus_info, sizeof (info->bus_info));
1034 }
1035
1036 /* also handles three patterns of some kind in hardware */
1037 #define WOL_SUPPORTED   (WAKE_MAGIC|WAKE_PHY)
1038
1039 static void
1040 pegasus_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1041 {
1042         pegasus_t       *pegasus = netdev_priv(dev);
1043
1044         wol->supported = WAKE_MAGIC | WAKE_PHY;
1045         wol->wolopts = pegasus->wolopts;
1046 }
1047
1048 static int
1049 pegasus_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1050 {
1051         pegasus_t       *pegasus = netdev_priv(dev);
1052         u8              reg78 = 0x04;
1053
1054         if (wol->wolopts & ~WOL_SUPPORTED)
1055                 return -EINVAL;
1056
1057         if (wol->wolopts & WAKE_MAGIC)
1058                 reg78 |= 0x80;
1059         if (wol->wolopts & WAKE_PHY)
1060                 reg78 |= 0x40;
1061         /* FIXME this 0x10 bit still needs to get set in the chip... */
1062         if (wol->wolopts)
1063                 pegasus->eth_regs[0] |= 0x10;
1064         else
1065                 pegasus->eth_regs[0] &= ~0x10;
1066         pegasus->wolopts = wol->wolopts;
1067         return set_register(pegasus, WakeupControl, reg78);
1068 }
1069
1070 static inline void pegasus_reset_wol(struct net_device *dev)
1071 {
1072         struct ethtool_wolinfo wol;
1073
1074         memset(&wol, 0, sizeof wol);
1075         (void) pegasus_set_wol(dev, &wol);
1076 }
1077
1078 static int
1079 pegasus_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1080 {
1081         pegasus_t *pegasus;
1082
1083         if (in_atomic())
1084                 return 0;
1085
1086         pegasus = netdev_priv(dev);
1087         mii_ethtool_gset(&pegasus->mii, ecmd);
1088
1089         return 0;
1090 }
1091
1092 static int
1093 pegasus_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1094 {
1095         pegasus_t *pegasus = netdev_priv(dev);
1096         return mii_ethtool_sset(&pegasus->mii, ecmd);
1097 }
1098
1099 static int pegasus_nway_reset(struct net_device *dev)
1100 {
1101         pegasus_t *pegasus = netdev_priv(dev);
1102         return mii_nway_restart(&pegasus->mii);
1103 }
1104
1105 static u32 pegasus_get_link(struct net_device *dev)
1106 {
1107         pegasus_t *pegasus = netdev_priv(dev);
1108         return mii_link_ok(&pegasus->mii);
1109 }
1110
1111 static u32 pegasus_get_msglevel(struct net_device *dev)
1112 {
1113         pegasus_t *pegasus = netdev_priv(dev);
1114         return pegasus->msg_enable;
1115 }
1116
1117 static void pegasus_set_msglevel(struct net_device *dev, u32 v)
1118 {
1119         pegasus_t *pegasus = netdev_priv(dev);
1120         pegasus->msg_enable = v;
1121 }
1122
1123 static struct ethtool_ops ops = {
1124         .get_drvinfo = pegasus_get_drvinfo,
1125         .get_settings = pegasus_get_settings,
1126         .set_settings = pegasus_set_settings,
1127         .nway_reset = pegasus_nway_reset,
1128         .get_link = pegasus_get_link,
1129         .get_msglevel = pegasus_get_msglevel,
1130         .set_msglevel = pegasus_set_msglevel,
1131         .get_wol = pegasus_get_wol,
1132         .set_wol = pegasus_set_wol,
1133 };
1134
1135 static int pegasus_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
1136 {
1137         __u16 *data = (__u16 *) & rq->ifr_ifru;
1138         pegasus_t *pegasus = netdev_priv(net);
1139         int res;
1140
1141         switch (cmd) {
1142         case SIOCDEVPRIVATE:
1143                 data[0] = pegasus->phy;
1144         case SIOCDEVPRIVATE + 1:
1145                 read_mii_word(pegasus, data[0], data[1] & 0x1f, &data[3]);
1146                 res = 0;
1147                 break;
1148         case SIOCDEVPRIVATE + 2:
1149                 if (!capable(CAP_NET_ADMIN))
1150                         return -EPERM;
1151                 write_mii_word(pegasus, pegasus->phy, data[1] & 0x1f, data[2]);
1152                 res = 0;
1153                 break;
1154         default:
1155                 res = -EOPNOTSUPP;
1156         }
1157         return res;
1158 }
1159
1160 static void pegasus_set_multicast(struct net_device *net)
1161 {
1162         pegasus_t *pegasus = netdev_priv(net);
1163
1164         if (net->flags & IFF_PROMISC) {
1165                 pegasus->eth_regs[EthCtrl2] |= RX_PROMISCUOUS;
1166                 if (netif_msg_link(pegasus))
1167                         pr_info("%s: Promiscuous mode enabled.\n", net->name);
1168         } else if (net->mc_count ||
1169                    (net->flags & IFF_ALLMULTI)) {
1170                 pegasus->eth_regs[EthCtrl0] |= RX_MULTICAST;
1171                 pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1172                 if (netif_msg_link(pegasus))
1173                         pr_info("%s: set allmulti\n", net->name);
1174         } else {
1175                 pegasus->eth_regs[EthCtrl0] &= ~RX_MULTICAST;
1176                 pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1177         }
1178
1179         pegasus->flags |= ETH_REGS_CHANGE;
1180         ctrl_callback(pegasus->ctrl_urb, NULL);
1181 }
1182
1183 static __u8 mii_phy_probe(pegasus_t * pegasus)
1184 {
1185         int i;
1186         __u16 tmp;
1187
1188         for (i = 0; i < 32; i++) {
1189                 read_mii_word(pegasus, i, MII_BMSR, &tmp);
1190                 if (tmp == 0 || tmp == 0xffff || (tmp & BMSR_MEDIA) == 0)
1191                         continue;
1192                 else
1193                         return i;
1194         }
1195
1196         return 0xff;
1197 }
1198
1199 static inline void setup_pegasus_II(pegasus_t * pegasus)
1200 {
1201         __u8 data = 0xa5;
1202         int ret;
1203
1204         ret = set_register(pegasus, Reg1d, 0);
1205         ret = set_register(pegasus, Reg7b, 1);
1206         mdelay(100);
1207         if ((pegasus->features & HAS_HOME_PNA) && mii_mode)
1208                 ret = set_register(pegasus, Reg7b, 0);
1209         else
1210                 ret = set_register(pegasus, Reg7b, 2);
1211
1212         ret = set_register(pegasus, 0x83, data);
1213         ret = get_registers(pegasus, 0x83, 1, &data);
1214
1215         if (data == 0xa5) {
1216                 pegasus->chip = 0x8513;
1217         } else {
1218                 pegasus->chip = 0;
1219         }
1220
1221         ret = set_register(pegasus, 0x80, 0xc0);
1222         ret = set_register(pegasus, 0x83, 0xff);
1223         ret = set_register(pegasus, 0x84, 0x01);
1224
1225         if (pegasus->features & HAS_HOME_PNA && mii_mode)
1226                 ret = set_register(pegasus, Reg81, 6);
1227         else
1228                 ret = set_register(pegasus, Reg81, 2);
1229 }
1230
1231
1232 static struct workqueue_struct *pegasus_workqueue = NULL;
1233 #define CARRIER_CHECK_DELAY (2 * HZ)
1234
1235 static void check_carrier(void *data)
1236 {
1237         pegasus_t *pegasus = data;
1238         set_carrier(pegasus->net);
1239         if (!(pegasus->flags & PEGASUS_UNPLUG)) {
1240                 queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1241                         CARRIER_CHECK_DELAY);
1242         }
1243 }
1244
1245 static int pegasus_probe(struct usb_interface *intf,
1246                          const struct usb_device_id *id)
1247 {
1248         struct usb_device *dev = interface_to_usbdev(intf);
1249         struct net_device *net;
1250         pegasus_t *pegasus;
1251         int dev_index = id - pegasus_ids;
1252         int res = -ENOMEM;
1253
1254         usb_get_dev(dev);
1255         net = alloc_etherdev(sizeof(struct pegasus));
1256         if (!net) {
1257                 dev_err(&intf->dev, "can't allocate %s\n", "device");
1258                 goto out;
1259         }
1260
1261         pegasus = netdev_priv(net);
1262         memset(pegasus, 0, sizeof (struct pegasus));
1263         pegasus->dev_index = dev_index;
1264         init_waitqueue_head(&pegasus->ctrl_wait);
1265
1266         if (!alloc_urbs(pegasus)) {
1267                 dev_err(&intf->dev, "can't allocate %s\n", "urbs");
1268                 goto out1;
1269         }
1270
1271         tasklet_init(&pegasus->rx_tl, rx_fixup, (unsigned long) pegasus);
1272
1273         INIT_WORK(&pegasus->carrier_check, check_carrier, pegasus);
1274
1275         pegasus->intf = intf;
1276         pegasus->usb = dev;
1277         pegasus->net = net;
1278         SET_MODULE_OWNER(net);
1279         net->open = pegasus_open;
1280         net->stop = pegasus_close;
1281         net->watchdog_timeo = PEGASUS_TX_TIMEOUT;
1282         net->tx_timeout = pegasus_tx_timeout;
1283         net->do_ioctl = pegasus_ioctl;
1284         net->hard_start_xmit = pegasus_start_xmit;
1285         net->set_multicast_list = pegasus_set_multicast;
1286         net->get_stats = pegasus_netdev_stats;
1287         SET_ETHTOOL_OPS(net, &ops);
1288         pegasus->mii.dev = net;
1289         pegasus->mii.mdio_read = mdio_read;
1290         pegasus->mii.mdio_write = mdio_write;
1291         pegasus->mii.phy_id_mask = 0x1f;
1292         pegasus->mii.reg_num_mask = 0x1f;
1293         spin_lock_init(&pegasus->rx_pool_lock);
1294         pegasus->msg_enable = netif_msg_init (msg_level, NETIF_MSG_DRV
1295                                 | NETIF_MSG_PROBE | NETIF_MSG_LINK);
1296
1297         pegasus->features = usb_dev_id[dev_index].private;
1298         get_interrupt_interval(pegasus);
1299         if (reset_mac(pegasus)) {
1300                 dev_err(&intf->dev, "can't reset MAC\n");
1301                 res = -EIO;
1302                 goto out2;
1303         }
1304         set_ethernet_addr(pegasus);
1305         fill_skb_pool(pegasus);
1306         if (pegasus->features & PEGASUS_II) {
1307                 dev_info(&intf->dev, "setup Pegasus II specific registers\n");
1308                 setup_pegasus_II(pegasus);
1309         }
1310         pegasus->phy = mii_phy_probe(pegasus);
1311         if (pegasus->phy == 0xff) {
1312                 dev_warn(&intf->dev, "can't locate MII phy, using default\n");
1313                 pegasus->phy = 1;
1314         }
1315         pegasus->mii.phy_id = pegasus->phy;
1316         usb_set_intfdata(intf, pegasus);
1317         SET_NETDEV_DEV(net, &intf->dev);
1318         pegasus_reset_wol(net);
1319         res = register_netdev(net);
1320         if (res)
1321                 goto out3;
1322         queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1323                                 CARRIER_CHECK_DELAY);
1324
1325         dev_info(&intf->dev, "%s, %s, %02x:%02x:%02x:%02x:%02x:%02x\n",
1326                 net->name,
1327                 usb_dev_id[dev_index].name,
1328                 net->dev_addr [0], net->dev_addr [1],
1329                 net->dev_addr [2], net->dev_addr [3],
1330                 net->dev_addr [4], net->dev_addr [5]);
1331         return 0;
1332
1333 out3:
1334         usb_set_intfdata(intf, NULL);
1335         free_skb_pool(pegasus);
1336 out2:
1337         free_all_urbs(pegasus);
1338 out1:
1339         free_netdev(net);
1340 out:
1341         usb_put_dev(dev);
1342         return res;
1343 }
1344
1345 static void pegasus_disconnect(struct usb_interface *intf)
1346 {
1347         struct pegasus *pegasus = usb_get_intfdata(intf);
1348
1349         usb_set_intfdata(intf, NULL);
1350         if (!pegasus) {
1351                 dev_dbg(&intf->dev, "unregistering non-bound device?\n");
1352                 return;
1353         }
1354
1355         pegasus->flags |= PEGASUS_UNPLUG;
1356         cancel_delayed_work(&pegasus->carrier_check);
1357         unregister_netdev(pegasus->net);
1358         usb_put_dev(interface_to_usbdev(intf));
1359         free_all_urbs(pegasus);
1360         free_skb_pool(pegasus);
1361         if (pegasus->rx_skb)
1362                 dev_kfree_skb(pegasus->rx_skb);
1363         free_netdev(pegasus->net);
1364 }
1365
1366 static int pegasus_suspend (struct usb_interface *intf, pm_message_t message)
1367 {
1368         struct pegasus *pegasus = usb_get_intfdata(intf);
1369
1370         netif_device_detach (pegasus->net);
1371         if (netif_running(pegasus->net)) {
1372                 cancel_delayed_work(&pegasus->carrier_check);
1373
1374                 usb_kill_urb(pegasus->rx_urb);
1375                 usb_kill_urb(pegasus->intr_urb);
1376         }
1377         intf->dev.power.power_state = PMSG_SUSPEND;
1378         return 0;
1379 }
1380
1381 static int pegasus_resume (struct usb_interface *intf)
1382 {
1383         struct pegasus *pegasus = usb_get_intfdata(intf);
1384
1385         intf->dev.power.power_state = PMSG_ON;
1386         netif_device_attach (pegasus->net);
1387         if (netif_running(pegasus->net)) {
1388                 pegasus->rx_urb->status = 0;
1389                 pegasus->rx_urb->actual_length = 0;
1390                 read_bulk_callback(pegasus->rx_urb, NULL);
1391
1392                 pegasus->intr_urb->status = 0;
1393                 pegasus->intr_urb->actual_length = 0;
1394                 intr_callback(pegasus->intr_urb, NULL);
1395
1396                 queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1397                                         CARRIER_CHECK_DELAY);
1398         }
1399         return 0;
1400 }
1401
1402 static struct usb_driver pegasus_driver = {
1403         .name = driver_name,
1404         .probe = pegasus_probe,
1405         .disconnect = pegasus_disconnect,
1406         .id_table = pegasus_ids,
1407         .suspend = pegasus_suspend,
1408         .resume = pegasus_resume,
1409 };
1410
1411 static int __init pegasus_init(void)
1412 {
1413         pr_info("%s: %s, " DRIVER_DESC "\n", driver_name, DRIVER_VERSION);
1414         pegasus_workqueue = create_singlethread_workqueue("pegasus");
1415         if (!pegasus_workqueue)
1416                 return -ENOMEM;
1417         return usb_register(&pegasus_driver);
1418 }
1419
1420 static void __exit pegasus_exit(void)
1421 {
1422         destroy_workqueue(pegasus_workqueue);
1423         usb_deregister(&pegasus_driver);
1424 }
1425
1426 module_init(pegasus_init);
1427 module_exit(pegasus_exit);