drivers/usb/net/pegasus.c

   1 /*
   2  *  Copyright (c) 1999-2005 Petko Manolov (petkan@users.sourceforge.net)
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  *
   8  *      ChangeLog:
   9  *              ....    Most of the time spent on reading sources & docs.
  10  *              v0.2.x  First official release for the Linux kernel.
  11  *              v0.3.0  Beutified and structured, some bugs fixed.
  12  *              v0.3.x  URBifying bulk requests and bugfixing. First relatively
  13  *                      stable release. Still can touch device's registers only
  14  *                      from top-halves.
  15  *              v0.4.0  Control messages remained unurbified are now URBs.
  16  *                      Now we can touch the HW at any time.
  17  *              v0.4.9  Control urbs again use process context to wait. Argh...
  18  *                      Some long standing bugs (enable_net_traffic) fixed.
  19  *                      Also nasty trick about resubmiting control urb from
  20  *                      interrupt context used. Please let me know how it
  21  *                      behaves. Pegasus II support added since this version.
  22  *                      TODO: suppressing HCD warnings spewage on disconnect.
  23  *              v0.4.13 Ethernet address is now set at probe(), not at open()
  24  *                      time as this seems to break dhcpd.
  25  *              v0.5.0  branch to 2.5.x kernels
  26  *              v0.5.1  ethtool support added
  27  *              v0.5.5  rx socket buffers are in a pool and the their allocation
  28  *                      is out of the interrupt routine.
  29  */
  30
  31 #include <linux/sched.h>
  32 #include <linux/slab.h>
  33 #include <linux/init.h>
  34 #include <linux/delay.h>
  35 #include <linux/netdevice.h>
  36 #include <linux/etherdevice.h>
  37 #include <linux/ethtool.h>
  38 #include <linux/mii.h>
  39 #include <linux/usb.h>
  40 #include <linux/module.h>
  41 #include <asm/byteorder.h>
  42 #include <asm/uaccess.h>
  43 #include "pegasus.h"
  44
  45 /*
  46  * Version Information
  47  */
  48 #define DRIVER_VERSION "v0.6.13 (2005/11/13)"
  49 #define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>"
  50 #define DRIVER_DESC "Pegasus/Pegasus II USB Ethernet driver"
  51
  52 static const char driver_name[] = "pegasus";
  53
  54 #undef  PEGASUS_WRITE_EEPROM
  55 #define BMSR_MEDIA      (BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | \
  56                         BMSR_100FULL | BMSR_ANEGCAPABLE)
  57
  58 static int loopback = 0;
  59 static int mii_mode = 0;
  60 static char *devid=NULL;
  61
  62 static struct usb_eth_dev usb_dev_id[] = {
  63 #define PEGASUS_DEV(pn, vid, pid, flags)        \
  64         {.name = pn, .vendor = vid, .device = pid, .private = flags},
  65 #include "pegasus.h"
  66 #undef  PEGASUS_DEV
  67         {NULL, 0, 0, 0},
  68         {NULL, 0, 0, 0}
  69 };
  70
  71 static struct usb_device_id pegasus_ids[] = {
  72 #define PEGASUS_DEV(pn, vid, pid, flags) \
  73         {.match_flags = USB_DEVICE_ID_MATCH_DEVICE, .idVendor = vid, .idProduct = pid},
  74 #include "pegasus.h"
  75 #undef  PEGASUS_DEV
  76         {},
  77         {}
  78 };
  79
  80 MODULE_AUTHOR(DRIVER_AUTHOR);
  81 MODULE_DESCRIPTION(DRIVER_DESC);
  82 MODULE_LICENSE("GPL");
  83 module_param(loopback, bool, 0);
  84 module_param(mii_mode, bool, 0);
  85 module_param(devid, charp, 0);
  86 MODULE_PARM_DESC(loopback, "Enable MAC loopback mode (bit 0)");
  87 MODULE_PARM_DESC(mii_mode, "Enable HomePNA mode (bit 0),default=MII mode = 0");
  88 MODULE_PARM_DESC(devid, "The format is: 'DEV_name:VendorID:DeviceID:Flags'");
  89
  90 /* use ethtool to change the level for any given device */
  91 static int msg_level = -1;
  92 module_param (msg_level, int, 0);
  93 MODULE_PARM_DESC (msg_level, "Override default message level");
  94
  95 MODULE_DEVICE_TABLE(usb, pegasus_ids);
  96
  97 static int update_eth_regs_async(pegasus_t *);
  98 /* Aargh!!! I _really_ hate such tweaks */
  99 static void ctrl_callback(struct urb *urb, struct pt_regs *regs)
 100 {
 101         pegasus_t *pegasus = urb->context;
 102
 103         if (!pegasus)
 104                 return;
 105
 106         switch (urb->status) {
 107         case 0:
 108                 if (pegasus->flags & ETH_REGS_CHANGE) {
 109                         pegasus->flags &= ~ETH_REGS_CHANGE;
 110                         pegasus->flags |= ETH_REGS_CHANGED;
 111                         update_eth_regs_async(pegasus);
 112                         return;
 113                 }
 114                 break;
 115         case -EINPROGRESS:
 116                 return;
 117         case -ENOENT:
 118                 break;
 119         default:
 120                 if (netif_msg_drv(pegasus))
 121                         dev_dbg(&pegasus->intf->dev, "%s, status %d\n",
 122                                 __FUNCTION__, urb->status);
 123         }
 124         pegasus->flags &= ~ETH_REGS_CHANGED;
 125         wake_up(&pegasus->ctrl_wait);
 126 }
 127
 128 static int get_registers(pegasus_t * pegasus, __u16 indx, __u16 size,
 129                          void *data)
 130 {
 131         int ret;
 132         char *buffer;
 133         DECLARE_WAITQUEUE(wait, current);
 134
 135         buffer = kmalloc(size, GFP_KERNEL);
 136         if (!buffer) {
 137                 if (netif_msg_drv(pegasus))
 138                         dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
 139                                         __FUNCTION__);
 140                 return -ENOMEM;
 141         }
 142         add_wait_queue(&pegasus->ctrl_wait, &wait);
 143         set_current_state(TASK_UNINTERRUPTIBLE);
 144         while (pegasus->flags & ETH_REGS_CHANGED)
 145                 schedule();
 146         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 147         set_current_state(TASK_RUNNING);
 148
 149         pegasus->dr.bRequestType = PEGASUS_REQT_READ;
 150         pegasus->dr.bRequest = PEGASUS_REQ_GET_REGS;
 151         pegasus->dr.wValue = cpu_to_le16(0);
 152         pegasus->dr.wIndex = cpu_to_le16p(&indx);
 153         pegasus->dr.wLength = cpu_to_le16p(&size);
 154         pegasus->ctrl_urb->transfer_buffer_length = size;
 155
 156         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 157                              usb_rcvctrlpipe(pegasus->usb, 0),
 158                              (char *) &pegasus->dr,
 159                              buffer, size, ctrl_callback, pegasus);
 160
 161         add_wait_queue(&pegasus->ctrl_wait, &wait);
 162         set_current_state(TASK_UNINTERRUPTIBLE);
 163
 164         /* using ATOMIC, we'd never wake up if we slept */
 165         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 166                 if (ret == -ENODEV)
 167                         netif_device_detach(pegasus->net);
 168                 if (netif_msg_drv(pegasus))
 169                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 170                                         __FUNCTION__, ret);
 171                 goto out;
 172         }
 173
 174         schedule();
 175 out:
 176         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 177         memcpy(data, buffer, size);
 178         kfree(buffer);
 179
 180         return ret;
 181 }
 182
 183 static int set_registers(pegasus_t * pegasus, __u16 indx, __u16 size,
 184                          void *data)
 185 {
 186         int ret;
 187         char *buffer;
 188         DECLARE_WAITQUEUE(wait, current);
 189
 190         buffer = kmalloc(size, GFP_KERNEL);
 191         if (!buffer) {
 192                 if (netif_msg_drv(pegasus))
 193                         dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
 194                                         __FUNCTION__);
 195                 return -ENOMEM;
 196         }
 197         memcpy(buffer, data, size);
 198
 199         add_wait_queue(&pegasus->ctrl_wait, &wait);
 200         set_current_state(TASK_UNINTERRUPTIBLE);
 201         while (pegasus->flags & ETH_REGS_CHANGED)
 202                 schedule();
 203         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 204         set_current_state(TASK_RUNNING);
 205
 206         pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
 207         pegasus->dr.bRequest = PEGASUS_REQ_SET_REGS;
 208         pegasus->dr.wValue = cpu_to_le16(0);
 209         pegasus->dr.wIndex = cpu_to_le16p(&indx);
 210         pegasus->dr.wLength = cpu_to_le16p(&size);
 211         pegasus->ctrl_urb->transfer_buffer_length = size;
 212
 213         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 214                              usb_sndctrlpipe(pegasus->usb, 0),
 215                              (char *) &pegasus->dr,
 216                              buffer, size, ctrl_callback, pegasus);
 217
 218         add_wait_queue(&pegasus->ctrl_wait, &wait);
 219         set_current_state(TASK_UNINTERRUPTIBLE);
 220
 221         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 222                 if (ret == -ENODEV)
 223                         netif_device_detach(pegasus->net);
 224                 if (netif_msg_drv(pegasus))
 225                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 226                                         __FUNCTION__, ret);
 227                 goto out;
 228         }
 229
 230         schedule();
 231 out:
 232         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 233         kfree(buffer);
 234
 235         return ret;
 236 }
 237
 238 static int set_register(pegasus_t * pegasus, __u16 indx, __u8 data)
 239 {
 240         int ret;
 241         char *tmp;
 242         DECLARE_WAITQUEUE(wait, current);
 243
 244         tmp = kmalloc(1, GFP_KERNEL);
 245         if (!tmp) {
 246                 if (netif_msg_drv(pegasus))
 247                         dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
 248                                         __FUNCTION__);
 249                 return -ENOMEM;
 250         }
 251         memcpy(tmp, &data, 1);
 252         add_wait_queue(&pegasus->ctrl_wait, &wait);
 253         set_current_state(TASK_UNINTERRUPTIBLE);
 254         while (pegasus->flags & ETH_REGS_CHANGED)
 255                 schedule();
 256         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 257         set_current_state(TASK_RUNNING);
 258
 259         pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
 260         pegasus->dr.bRequest = PEGASUS_REQ_SET_REG;
 261         pegasus->dr.wValue = cpu_to_le16(data);
 262         pegasus->dr.wIndex = cpu_to_le16p(&indx);
 263         pegasus->dr.wLength = cpu_to_le16(1);
 264         pegasus->ctrl_urb->transfer_buffer_length = 1;
 265
 266         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 267                              usb_sndctrlpipe(pegasus->usb, 0),
 268                              (char *) &pegasus->dr,
 269                              tmp, 1, ctrl_callback, pegasus);
 270
 271         add_wait_queue(&pegasus->ctrl_wait, &wait);
 272         set_current_state(TASK_UNINTERRUPTIBLE);
 273
 274         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 275                 if (ret == -ENODEV)
 276                         netif_device_detach(pegasus->net);
 277                 if (netif_msg_drv(pegasus))
 278                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 279                                         __FUNCTION__, ret);
 280                 goto out;
 281         }
 282
 283         schedule();
 284 out:
 285         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 286         kfree(tmp);
 287
 288         return ret;
 289 }
 290
 291 static int update_eth_regs_async(pegasus_t * pegasus)
 292 {
 293         int ret;
 294
 295         pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
 296         pegasus->dr.bRequest = PEGASUS_REQ_SET_REGS;
 297         pegasus->dr.wValue = 0;
 298         pegasus->dr.wIndex = cpu_to_le16(EthCtrl0);
 299         pegasus->dr.wLength = cpu_to_le16(3);
 300         pegasus->ctrl_urb->transfer_buffer_length = 3;
 301
 302         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 303                              usb_sndctrlpipe(pegasus->usb, 0),
 304                              (char *) &pegasus->dr,
 305                              pegasus->eth_regs, 3, ctrl_callback, pegasus);
 306
 307         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 308                 if (ret == -ENODEV)
 309                         netif_device_detach(pegasus->net);
 310                 if (netif_msg_drv(pegasus))
 311                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 312                                         __FUNCTION__, ret);
 313         }
 314
 315         return ret;
 316 }
 317
 318 static int read_mii_word(pegasus_t * pegasus, __u8 phy, __u8 indx, __u16 * regd)
 319 {
 320         int i;
 321         __u8 data[4] = { phy, 0, 0, indx };
 322         __le16 regdi;
 323         int ret;
 324
 325         set_register(pegasus, PhyCtrl, 0);
 326         set_registers(pegasus, PhyAddr, sizeof (data), data);
 327         set_register(pegasus, PhyCtrl, (indx | PHY_READ));
 328         for (i = 0; i < REG_TIMEOUT; i++) {
 329                 ret = get_registers(pegasus, PhyCtrl, 1, data);
 330                 if (ret == -ESHUTDOWN)
 331                         goto fail;
 332                 if (data[0] & PHY_DONE)
 333                         break;
 334         }
 335         if (i < REG_TIMEOUT) {
 336                 ret = get_registers(pegasus, PhyData, 2, &regdi);
 337                 *regd = le16_to_cpu(regdi);
 338                 return ret;
 339         }
 340 fail:
 341         if (netif_msg_drv(pegasus))
 342                 dev_warn(&pegasus->intf->dev, "fail %s\n", __FUNCTION__);
 343
 344         return ret;
 345 }
 346
 347 static int mdio_read(struct net_device *dev, int phy_id, int loc)
 348 {
 349         pegasus_t *pegasus = (pegasus_t *) netdev_priv(dev);
 350         u16 res;
 351
 352         read_mii_word(pegasus, phy_id, loc, &res);
 353         return (int)res;
 354 }
 355
 356 static int write_mii_word(pegasus_t * pegasus, __u8 phy, __u8 indx, __u16 regd)
 357 {
 358         int i;
 359         __u8 data[4] = { phy, 0, 0, indx };
 360         int ret;
 361
 362         data[1] = (u8) regd;
 363         data[2] = (u8) (regd >> 8);
 364         set_register(pegasus, PhyCtrl, 0);
 365         set_registers(pegasus, PhyAddr, sizeof(data), data);
 366         set_register(pegasus, PhyCtrl, (indx | PHY_WRITE));
 367         for (i = 0; i < REG_TIMEOUT; i++) {
 368                 ret = get_registers(pegasus, PhyCtrl, 1, data);
 369                 if (ret == -ESHUTDOWN)
 370                         goto fail;
 371                 if (data[0] & PHY_DONE)
 372                         break;
 373         }
 374         if (i < REG_TIMEOUT)
 375                 return ret;
 376
 377 fail:
 378         if (netif_msg_drv(pegasus))
 379                 dev_warn(&pegasus->intf->dev, "fail %s\n", __FUNCTION__);
 380         return -ETIMEDOUT;
 381 }
 382
 383 static void mdio_write(struct net_device *dev, int phy_id, int loc, int val)
 384 {
 385         pegasus_t *pegasus = (pegasus_t *) netdev_priv(dev);
 386
 387         write_mii_word(pegasus, phy_id, loc, val);
 388 }
 389
 390 static int read_eprom_word(pegasus_t * pegasus, __u8 index, __u16 * retdata)
 391 {
 392         int i;
 393         __u8 tmp;
 394         __le16 retdatai;
 395         int ret;
 396
 397         set_register(pegasus, EpromCtrl, 0);
 398         set_register(pegasus, EpromOffset, index);
 399         set_register(pegasus, EpromCtrl, EPROM_READ);
 400
 401         for (i = 0; i < REG_TIMEOUT; i++) {
 402                 ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
 403                 if (tmp & EPROM_DONE)
 404                         break;
 405                 if (ret == -ESHUTDOWN)
 406                         goto fail;
 407         }
 408         if (i < REG_TIMEOUT) {
 409                 ret = get_registers(pegasus, EpromData, 2, &retdatai);
 410                 *retdata = le16_to_cpu(retdatai);
 411                 return ret;
 412         }
 413
 414 fail:
 415         if (netif_msg_drv(pegasus))
 416                 dev_warn(&pegasus->intf->dev, "fail %s\n", __FUNCTION__);
 417         return -ETIMEDOUT;
 418 }
 419
 420 #ifdef  PEGASUS_WRITE_EEPROM
 421 static inline void enable_eprom_write(pegasus_t * pegasus)
 422 {
 423         __u8 tmp;
 424         int ret;
 425
 426         get_registers(pegasus, EthCtrl2, 1, &tmp);
 427         set_register(pegasus, EthCtrl2, tmp | EPROM_WR_ENABLE);
 428 }
 429
 430 static inline void disable_eprom_write(pegasus_t * pegasus)
 431 {
 432         __u8 tmp;
 433         int ret;
 434
 435         get_registers(pegasus, EthCtrl2, 1, &tmp);
 436         set_register(pegasus, EpromCtrl, 0);
 437         set_register(pegasus, EthCtrl2, tmp & ~EPROM_WR_ENABLE);
 438 }
 439
 440 static int write_eprom_word(pegasus_t * pegasus, __u8 index, __u16 data)
 441 {
 442         int i;
 443         __u8 tmp, d[4] = { 0x3f, 0, 0, EPROM_WRITE };
 444         int ret;
 445
 446         set_registers(pegasus, EpromOffset, 4, d);
 447         enable_eprom_write(pegasus);
 448         set_register(pegasus, EpromOffset, index);
 449         set_registers(pegasus, EpromData, 2, &data);
 450         set_register(pegasus, EpromCtrl, EPROM_WRITE);
 451
 452         for (i = 0; i < REG_TIMEOUT; i++) {
 453                 ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
 454                 if (ret == -ESHUTDOWN)
 455                         goto fail;
 456                 if (tmp & EPROM_DONE)
 457                         break;
 458         }
 459         disable_eprom_write(pegasus);
 460         if (i < REG_TIMEOUT)
 461                 return ret;
 462 fail:
 463         if (netif_msg_drv(pegasus))
 464                 dev_warn(&pegasus->intf->dev, "fail %s\n", __FUNCTION__);
 465         return -ETIMEDOUT;
 466 }
 467 #endif                          /* PEGASUS_WRITE_EEPROM */
 468
 469 static inline void get_node_id(pegasus_t * pegasus, __u8 * id)
 470 {
 471         int i;
 472         __u16 w16;
 473
 474         for (i = 0; i < 3; i++) {
 475                 read_eprom_word(pegasus, i, &w16);
 476                 ((__le16 *) id)[i] = cpu_to_le16p(&w16);
 477         }
 478 }
 479
 480 static void set_ethernet_addr(pegasus_t * pegasus)
 481 {
 482         __u8 node_id[6];
 483
 484         get_node_id(pegasus, node_id);
 485         set_registers(pegasus, EthID, sizeof (node_id), node_id);
 486         memcpy(pegasus->net->dev_addr, node_id, sizeof (node_id));
 487 }
 488
 489 static inline int reset_mac(pegasus_t * pegasus)
 490 {
 491         __u8 data = 0x8;
 492         int i;
 493
 494         set_register(pegasus, EthCtrl1, data);
 495         for (i = 0; i < REG_TIMEOUT; i++) {
 496                 get_registers(pegasus, EthCtrl1, 1, &data);
 497                 if (~data & 0x08) {
 498                         if (loopback & 1)
 499                                 break;
 500                         if (mii_mode && (pegasus->features & HAS_HOME_PNA))
 501                                 set_register(pegasus, Gpio1, 0x34);
 502                         else
 503                                 set_register(pegasus, Gpio1, 0x26);
 504                         set_register(pegasus, Gpio0, pegasus->features);
 505                         set_register(pegasus, Gpio0, DEFAULT_GPIO_SET);
 506                         break;
 507                 }
 508         }
 509         if (i == REG_TIMEOUT)
 510                 return -ETIMEDOUT;
 511
 512         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
 513             usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
 514                 set_register(pegasus, Gpio0, 0x24);
 515                 set_register(pegasus, Gpio0, 0x26);
 516         }
 517         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_ELCON) {
 518                 __u16 auxmode;
 519                 read_mii_word(pegasus, 3, 0x1b, &auxmode);
 520                 write_mii_word(pegasus, 3, 0x1b, auxmode | 4);
 521         }
 522
 523         return 0;
 524 }
 525
 526 static int enable_net_traffic(struct net_device *dev, struct usb_device *usb)
 527 {
 528         __u16 linkpart;
 529         __u8 data[4];
 530         pegasus_t *pegasus = netdev_priv(dev);
 531         int ret;
 532
 533         read_mii_word(pegasus, pegasus->phy, MII_LPA, &linkpart);
 534         data[0] = 0xc9;
 535         data[1] = 0;
 536         if (linkpart & (ADVERTISE_100FULL | ADVERTISE_10FULL))
 537                 data[1] |= 0x20;        /* set full duplex */
 538         if (linkpart & (ADVERTISE_100FULL | ADVERTISE_100HALF))
 539                 data[1] |= 0x10;        /* set 100 Mbps */
 540         if (mii_mode)
 541                 data[1] = 0;
 542         data[2] = (loopback & 1) ? 0x09 : 0x01;
 543
 544         memcpy(pegasus->eth_regs, data, sizeof (data));
 545         ret = set_registers(pegasus, EthCtrl0, 3, data);
 546
 547         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
 548             usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS2 ||
 549             usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
 550                 u16 auxmode;
 551                 read_mii_word(pegasus, 0, 0x1b, &auxmode);
 552                 write_mii_word(pegasus, 0, 0x1b, auxmode | 4);
 553         }
 554
 555         return ret;
 556 }
 557
 558 static void fill_skb_pool(pegasus_t * pegasus)
 559 {
 560         int i;
 561
 562         for (i = 0; i < RX_SKBS; i++) {
 563                 if (pegasus->rx_pool[i])
 564                         continue;
 565                 pegasus->rx_pool[i] = dev_alloc_skb(PEGASUS_MTU + 2);
 566                 /*
 567                  ** we give up if the allocation fail. the tasklet will be
 568                  ** rescheduled again anyway...
 569                  */
 570                 if (pegasus->rx_pool[i] == NULL)
 571                         return;
 572                 pegasus->rx_pool[i]->dev = pegasus->net;
 573                 skb_reserve(pegasus->rx_pool[i], 2);
 574         }
 575 }
 576
 577 static void free_skb_pool(pegasus_t * pegasus)
 578 {
 579         int i;
 580
 581         for (i = 0; i < RX_SKBS; i++) {
 582                 if (pegasus->rx_pool[i]) {
 583                         dev_kfree_skb(pegasus->rx_pool[i]);
 584                         pegasus->rx_pool[i] = NULL;
 585                 }
 586         }
 587 }
 588
 589 static inline struct sk_buff *pull_skb(pegasus_t * pegasus)
 590 {
 591         int i;
 592         struct sk_buff *skb;
 593
 594         for (i = 0; i < RX_SKBS; i++) {
 595                 if (likely(pegasus->rx_pool[i] != NULL)) {
 596                         skb = pegasus->rx_pool[i];
 597                         pegasus->rx_pool[i] = NULL;
 598                         return skb;
 599                 }
 600         }
 601         return NULL;
 602 }
 603
 604 static void read_bulk_callback(struct urb *urb, struct pt_regs *regs)
 605 {
 606         pegasus_t *pegasus = urb->context;
 607         struct net_device *net;
 608         int rx_status, count = urb->actual_length;
 609         u8 *buf = urb->transfer_buffer;
 610         __u16 pkt_len;
 611
 612         if (!pegasus)
 613                 return;
 614
 615         net = pegasus->net;
 616         if (!netif_device_present(net) || !netif_running(net))
 617                 return;
 618
 619         switch (urb->status) {
 620         case 0:
 621                 break;
 622         case -ETIME:
 623                 if (netif_msg_rx_err(pegasus))
 624                         pr_debug("%s: reset MAC\n", net->name);
 625                 pegasus->flags &= ~PEGASUS_RX_BUSY;
 626                 break;
 627         case -EPIPE:            /* stall, or disconnect from TT */
 628                 /* FIXME schedule work to clear the halt */
 629                 if (netif_msg_rx_err(pegasus))
 630                         printk(KERN_WARNING "%s: no rx stall recovery\n",
 631                                         net->name);
 632                 return;
 633         case -ENOENT:
 634         case -ECONNRESET:
 635         case -ESHUTDOWN:
 636                 if (netif_msg_ifdown(pegasus))
 637                         pr_debug("%s: rx unlink, %d\n", net->name, urb->status);
 638                 return;
 639         default:
 640                 if (netif_msg_rx_err(pegasus))
 641                         pr_debug("%s: RX status %d\n", net->name, urb->status);
 642                 goto goon;
 643         }
 644
 645         if (!count || count < 4)
 646                 goto goon;
 647
 648         rx_status = buf[count - 2];
 649         if (rx_status & 0x1e) {
 650                 if (netif_msg_rx_err(pegasus))
 651                         pr_debug("%s: RX packet error %x\n",
 652                                         net->name, rx_status);
 653                 pegasus->stats.rx_errors++;
 654                 if (rx_status & 0x06)   // long or runt
 655                         pegasus->stats.rx_length_errors++;
 656                 if (rx_status & 0x08)
 657                         pegasus->stats.rx_crc_errors++;
 658                 if (rx_status & 0x10)   // extra bits
 659                         pegasus->stats.rx_frame_errors++;
 660                 goto goon;
 661         }
 662         if (pegasus->chip == 0x8513) {
 663                 pkt_len = le32_to_cpu(*(__le32 *)urb->transfer_buffer);
 664                 pkt_len &= 0x0fff;
 665                 pegasus->rx_skb->data += 2;
 666         } else {
 667                 pkt_len = buf[count - 3] << 8;
 668                 pkt_len += buf[count - 4];
 669                 pkt_len &= 0xfff;
 670                 pkt_len -= 8;
 671         }
 672
 673         /*
 674          * If the packet is unreasonably long, quietly drop it rather than
 675          * kernel panicing by calling skb_put.
 676          */
 677         if (pkt_len > PEGASUS_MTU)
 678                 goto goon;
 679
 680         /*
 681          * at this point we are sure pegasus->rx_skb != NULL
 682          * so we go ahead and pass up the packet.
 683          */
 684         skb_put(pegasus->rx_skb, pkt_len);
 685         pegasus->rx_skb->protocol = eth_type_trans(pegasus->rx_skb, net);
 686         netif_rx(pegasus->rx_skb);
 687         pegasus->stats.rx_packets++;
 688         pegasus->stats.rx_bytes += pkt_len;
 689
 690         if (pegasus->flags & PEGASUS_UNPLUG)
 691                 return;
 692
 693         spin_lock(&pegasus->rx_pool_lock);
 694         pegasus->rx_skb = pull_skb(pegasus);
 695         spin_unlock(&pegasus->rx_pool_lock);
 696
 697         if (pegasus->rx_skb == NULL)
 698                 goto tl_sched;
 699 goon:
 700         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
 701                           usb_rcvbulkpipe(pegasus->usb, 1),
 702                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
 703                           read_bulk_callback, pegasus);
 704         rx_status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);
 705         if (rx_status == -ENODEV)
 706                 netif_device_detach(pegasus->net);
 707         else if (rx_status) {
 708                 pegasus->flags |= PEGASUS_RX_URB_FAIL;
 709                 goto tl_sched;
 710         } else {
 711                 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
 712         }
 713
 714         return;
 715
 716 tl_sched:
 717         tasklet_schedule(&pegasus->rx_tl);
 718 }
 719
 720 static void rx_fixup(unsigned long data)
 721 {
 722         pegasus_t *pegasus;
 723         unsigned long flags;
 724         int status;
 725
 726         pegasus = (pegasus_t *) data;
 727         if (pegasus->flags & PEGASUS_UNPLUG)
 728                 return;
 729
 730         spin_lock_irqsave(&pegasus->rx_pool_lock, flags);
 731         fill_skb_pool(pegasus);
 732         if (pegasus->flags & PEGASUS_RX_URB_FAIL)
 733                 if (pegasus->rx_skb)
 734                         goto try_again;
 735         if (pegasus->rx_skb == NULL) {
 736                 pegasus->rx_skb = pull_skb(pegasus);
 737         }
 738         if (pegasus->rx_skb == NULL) {
 739                 if (netif_msg_rx_err(pegasus))
 740                         printk(KERN_WARNING "%s: low on memory\n",
 741                                         pegasus->net->name);
 742                 tasklet_schedule(&pegasus->rx_tl);
 743                 goto done;
 744         }
 745         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
 746                           usb_rcvbulkpipe(pegasus->usb, 1),
 747                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
 748                           read_bulk_callback, pegasus);
 749 try_again:
 750         status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);
 751         if (status == -ENODEV)
 752                 netif_device_detach(pegasus->net);
 753         else if (status) {
 754                 pegasus->flags |= PEGASUS_RX_URB_FAIL;
 755                 tasklet_schedule(&pegasus->rx_tl);
 756         } else {
 757                 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
 758         }
 759 done:
 760         spin_unlock_irqrestore(&pegasus->rx_pool_lock, flags);
 761 }
 762
 763 static void write_bulk_callback(struct urb *urb, struct pt_regs *regs)
 764 {
 765         pegasus_t *pegasus = urb->context;
 766         struct net_device *net = pegasus->net;
 767
 768         if (!pegasus)
 769                 return;
 770
 771         if (!netif_device_present(net) || !netif_running(net))
 772                 return;
 773
 774         switch (urb->status) {
 775         case -EPIPE:
 776                 /* FIXME schedule_work() to clear the tx halt */
 777                 netif_stop_queue(net);
 778                 if (netif_msg_tx_err(pegasus))
 779                         printk(KERN_WARNING "%s: no tx stall recovery\n",
 780                                         net->name);
 781                 return;
 782         case -ENOENT:
 783         case -ECONNRESET:
 784         case -ESHUTDOWN:
 785                 if (netif_msg_ifdown(pegasus))
 786                         pr_debug("%s: tx unlink, %d\n", net->name, urb->status);
 787                 return;
 788         default:
 789                 if (netif_msg_tx_err(pegasus))
 790                         pr_info("%s: TX status %d\n", net->name, urb->status);
 791                 /* FALL THROUGH */
 792         case 0:
 793                 break;
 794         }
 795
 796         net->trans_start = jiffies;
 797         netif_wake_queue(net);
 798 }
 799
 800 static void intr_callback(struct urb *urb, struct pt_regs *regs)
 801 {
 802         pegasus_t *pegasus = urb->context;
 803         struct net_device *net;
 804         int status;
 805
 806         if (!pegasus)
 807                 return;
 808         net = pegasus->net;
 809
 810         switch (urb->status) {
 811         case 0:
 812                 break;
 813         case -ECONNRESET:       /* unlink */
 814         case -ENOENT:
 815         case -ESHUTDOWN:
 816                 return;
 817         default:
 818                 /* some Pegasus-I products report LOTS of data
 819                  * toggle errors... avoid log spamming
 820                  */
 821                 if (netif_msg_timer(pegasus))
 822                         pr_debug("%s: intr status %d\n", net->name,
 823                                         urb->status);
 824         }
 825
 826         if (urb->actual_length >= 6) {
 827                 u8      * d = urb->transfer_buffer;
 828
 829                 /* byte 0 == tx_status1, reg 2B */
 830                 if (d[0] & (TX_UNDERRUN|EXCESSIVE_COL
 831                                         |LATE_COL|JABBER_TIMEOUT)) {
 832                         pegasus->stats.tx_errors++;
 833                         if (d[0] & TX_UNDERRUN)
 834                                 pegasus->stats.tx_fifo_errors++;
 835                         if (d[0] & (EXCESSIVE_COL | JABBER_TIMEOUT))
 836                                 pegasus->stats.tx_aborted_errors++;
 837                         if (d[0] & LATE_COL)
 838                                 pegasus->stats.tx_window_errors++;
 839                 }
 840
 841                 /* d[5].LINK_STATUS lies on some adapters.
 842                  * d[0].NO_CARRIER kicks in only with failed TX.
 843                  * ... so monitoring with MII may be safest.
 844                  */
 845                 if (d[0] & NO_CARRIER)
 846                         netif_carrier_off(net);
 847                 else
 848                         netif_carrier_on(net);
 849
 850                 /* bytes 3-4 == rx_lostpkt, reg 2E/2F */
 851                 pegasus->stats.rx_missed_errors += ((d[3] & 0x7f) << 8) | d[4];
 852         }
 853
 854         status = usb_submit_urb(urb, SLAB_ATOMIC);
 855         if (status == -ENODEV)
 856                 netif_device_detach(pegasus->net);
 857         if (status && netif_msg_timer(pegasus))
 858                 printk(KERN_ERR "%s: can't resubmit interrupt urb, %d\n",
 859                                 net->name, status);
 860 }
 861
 862 static void pegasus_tx_timeout(struct net_device *net)
 863 {
 864         pegasus_t *pegasus = netdev_priv(net);
 865         if (netif_msg_timer(pegasus))
 866                 printk(KERN_WARNING "%s: tx timeout\n", net->name);
 867         usb_unlink_urb(pegasus->tx_urb);
 868         pegasus->stats.tx_errors++;
 869 }
 870
 871 static int pegasus_start_xmit(struct sk_buff *skb, struct net_device *net)
 872 {
 873         pegasus_t *pegasus = netdev_priv(net);
 874         int count = ((skb->len + 2) & 0x3f) ? skb->len + 2 : skb->len + 3;
 875         int res;
 876         __u16 l16 = skb->len;
 877
 878         netif_stop_queue(net);
 879
 880         ((__le16 *) pegasus->tx_buff)[0] = cpu_to_le16(l16);
 881         memcpy(pegasus->tx_buff + 2, skb->data, skb->len);
 882         usb_fill_bulk_urb(pegasus->tx_urb, pegasus->usb,
 883                           usb_sndbulkpipe(pegasus->usb, 2),
 884                           pegasus->tx_buff, count,
 885                           write_bulk_callback, pegasus);
 886         if ((res = usb_submit_urb(pegasus->tx_urb, GFP_ATOMIC))) {
 887                 if (netif_msg_tx_err(pegasus))
 888                         printk(KERN_WARNING "%s: fail tx, %d\n",
 889                                         net->name, res);
 890                 switch (res) {
 891                 case -EPIPE:            /* stall, or disconnect from TT */
 892                         /* cleanup should already have been scheduled */
 893                         break;
 894                 case -ENODEV:           /* disconnect() upcoming */
 895                         netif_device_detach(pegasus->net);
 896                         break;
 897                 default:
 898                         pegasus->stats.tx_errors++;
 899                         netif_start_queue(net);
 900                 }
 901         } else {
 902                 pegasus->stats.tx_packets++;
 903                 pegasus->stats.tx_bytes += skb->len;
 904                 net->trans_start = jiffies;
 905         }
 906         dev_kfree_skb(skb);
 907
 908         return 0;
 909 }
 910
 911 static struct net_device_stats *pegasus_netdev_stats(struct net_device *dev)
 912 {
 913         return &((pegasus_t *) netdev_priv(dev))->stats;
 914 }
 915
 916 static inline void disable_net_traffic(pegasus_t * pegasus)
 917 {
 918         int tmp = 0;
 919
 920         set_registers(pegasus, EthCtrl0, 2, &tmp);
 921 }
 922
 923 static inline void get_interrupt_interval(pegasus_t * pegasus)
 924 {
 925         __u8 data[2];
 926
 927         read_eprom_word(pegasus, 4, (__u16 *) data);
 928         if (pegasus->usb->speed != USB_SPEED_HIGH) {
 929                 if (data[1] < 0x80) {
 930                         if (netif_msg_timer(pegasus))
 931                                 dev_info(&pegasus->intf->dev, "intr interval "
 932                                         "changed from %ums to %ums\n",
 933                                         data[1], 0x80);
 934                         data[1] = 0x80;
 935 #ifdef PEGASUS_WRITE_EEPROM
 936                         write_eprom_word(pegasus, 4, *(__u16 *) data);
 937 #endif
 938                 }
 939         }
 940         pegasus->intr_interval = data[1];
 941 }
 942
 943 static void set_carrier(struct net_device *net)
 944 {
 945         pegasus_t *pegasus = netdev_priv(net);
 946         u16 tmp;
 947
 948         if (!read_mii_word(pegasus, pegasus->phy, MII_BMSR, &tmp))
 949                 return;
 950
 951         if (tmp & BMSR_LSTATUS)
 952                 netif_carrier_on(net);
 953         else
 954                 netif_carrier_off(net);
 955 }
 956
 957 static void free_all_urbs(pegasus_t * pegasus)
 958 {
 959         usb_free_urb(pegasus->intr_urb);
 960         usb_free_urb(pegasus->tx_urb);
 961         usb_free_urb(pegasus->rx_urb);
 962         usb_free_urb(pegasus->ctrl_urb);
 963 }
 964
 965 static void unlink_all_urbs(pegasus_t * pegasus)
 966 {
 967         usb_kill_urb(pegasus->intr_urb);
 968         usb_kill_urb(pegasus->tx_urb);
 969         usb_kill_urb(pegasus->rx_urb);
 970         usb_kill_urb(pegasus->ctrl_urb);
 971 }
 972
 973 static int alloc_urbs(pegasus_t * pegasus)
 974 {
 975         pegasus->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
 976         if (!pegasus->ctrl_urb) {
 977                 return 0;
 978         }
 979         pegasus->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 980         if (!pegasus->rx_urb) {
 981                 usb_free_urb(pegasus->ctrl_urb);
 982                 return 0;
 983         }
 984         pegasus->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 985         if (!pegasus->tx_urb) {
 986                 usb_free_urb(pegasus->rx_urb);
 987                 usb_free_urb(pegasus->ctrl_urb);
 988                 return 0;
 989         }
 990         pegasus->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
 991         if (!pegasus->intr_urb) {
 992                 usb_free_urb(pegasus->tx_urb);
 993                 usb_free_urb(pegasus->rx_urb);
 994                 usb_free_urb(pegasus->ctrl_urb);
 995                 return 0;
 996         }
 997
 998         return 1;
 999 }
1000
1001 static int pegasus_open(struct net_device *net)
1002 {
1003         pegasus_t *pegasus = netdev_priv(net);
1004         int res;
1005
1006         if (pegasus->rx_skb == NULL)
1007                 pegasus->rx_skb = pull_skb(pegasus);
1008         /*
1009          ** Note: no point to free the pool.  it is empty :-)
1010          */
1011         if (!pegasus->rx_skb)
1012                 return -ENOMEM;
1013
1014         res = set_registers(pegasus, EthID, 6, net->dev_addr);
1015
1016         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
1017                           usb_rcvbulkpipe(pegasus->usb, 1),
1018                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
1019                           read_bulk_callback, pegasus);
1020         if ((res = usb_submit_urb(pegasus->rx_urb, GFP_KERNEL))) {
1021                 if (res == -ENODEV)
1022                         netif_device_detach(pegasus->net);
1023                 if (netif_msg_ifup(pegasus))
1024                         pr_debug("%s: failed rx_urb, %d", net->name, res);
1025                 goto exit;
1026         }
1027
1028         usb_fill_int_urb(pegasus->intr_urb, pegasus->usb,
1029                          usb_rcvintpipe(pegasus->usb, 3),
1030                          pegasus->intr_buff, sizeof (pegasus->intr_buff),
1031                          intr_callback, pegasus, pegasus->intr_interval);
1032         if ((res = usb_submit_urb(pegasus->intr_urb, GFP_KERNEL))) {
1033                 if (res == -ENODEV)
1034                         netif_device_detach(pegasus->net);
1035                 if (netif_msg_ifup(pegasus))
1036                         pr_debug("%s: failed intr_urb, %d\n", net->name, res);
1037                 usb_kill_urb(pegasus->rx_urb);
1038                 goto exit;
1039         }
1040         if ((res = enable_net_traffic(net, pegasus->usb))) {
1041                 if (netif_msg_ifup(pegasus))
1042                         pr_debug("%s: can't enable_net_traffic() - %d\n",
1043                                         net->name, res);
1044                 res = -EIO;
1045                 usb_kill_urb(pegasus->rx_urb);
1046                 usb_kill_urb(pegasus->intr_urb);
1047                 free_skb_pool(pegasus);
1048                 goto exit;
1049         }
1050         set_carrier(net);
1051         netif_start_queue(net);
1052         if (netif_msg_ifup(pegasus))
1053                 pr_debug("%s: open\n", net->name);
1054         res = 0;
1055 exit:
1056         return res;
1057 }
1058
1059 static int pegasus_close(struct net_device *net)
1060 {
1061         pegasus_t *pegasus = netdev_priv(net);
1062
1063         netif_stop_queue(net);
1064         if (!(pegasus->flags & PEGASUS_UNPLUG))
1065                 disable_net_traffic(pegasus);
1066         tasklet_kill(&pegasus->rx_tl);
1067         unlink_all_urbs(pegasus);
1068
1069         return 0;
1070 }
1071
1072 static void pegasus_get_drvinfo(struct net_device *dev,
1073                                 struct ethtool_drvinfo *info)
1074 {
1075         pegasus_t *pegasus = netdev_priv(dev);
1076         strncpy(info->driver, driver_name, sizeof (info->driver) - 1);
1077         strncpy(info->version, DRIVER_VERSION, sizeof (info->version) - 1);
1078         usb_make_path(pegasus->usb, info->bus_info, sizeof (info->bus_info));
1079 }
1080
1081 /* also handles three patterns of some kind in hardware */
1082 #define WOL_SUPPORTED   (WAKE_MAGIC|WAKE_PHY)
1083
1084 static void
1085 pegasus_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1086 {
1087         pegasus_t       *pegasus = netdev_priv(dev);
1088
1089         wol->supported = WAKE_MAGIC | WAKE_PHY;
1090         wol->wolopts = pegasus->wolopts;
1091 }
1092
1093 static int
1094 pegasus_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1095 {
1096         pegasus_t       *pegasus = netdev_priv(dev);
1097         u8              reg78 = 0x04;
1098
1099         if (wol->wolopts & ~WOL_SUPPORTED)
1100                 return -EINVAL;
1101
1102         if (wol->wolopts & WAKE_MAGIC)
1103                 reg78 |= 0x80;
1104         if (wol->wolopts & WAKE_PHY)
1105                 reg78 |= 0x40;
1106         /* FIXME this 0x10 bit still needs to get set in the chip... */
1107         if (wol->wolopts)
1108                 pegasus->eth_regs[0] |= 0x10;
1109         else
1110                 pegasus->eth_regs[0] &= ~0x10;
1111         pegasus->wolopts = wol->wolopts;
1112         return set_register(pegasus, WakeupControl, reg78);
1113 }
1114
1115 static inline void pegasus_reset_wol(struct net_device *dev)
1116 {
1117         struct ethtool_wolinfo wol;
1118
1119         memset(&wol, 0, sizeof wol);
1120         (void) pegasus_set_wol(dev, &wol);
1121 }
1122
1123 static int
1124 pegasus_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1125 {
1126         pegasus_t *pegasus;
1127
1128         if (in_atomic())
1129                 return 0;
1130
1131         pegasus = netdev_priv(dev);
1132         mii_ethtool_gset(&pegasus->mii, ecmd);
1133
1134         return 0;
1135 }
1136
1137 static int
1138 pegasus_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1139 {
1140         pegasus_t *pegasus = netdev_priv(dev);
1141         return mii_ethtool_sset(&pegasus->mii, ecmd);
1142 }
1143
1144 static int pegasus_nway_reset(struct net_device *dev)
1145 {
1146         pegasus_t *pegasus = netdev_priv(dev);
1147         return mii_nway_restart(&pegasus->mii);
1148 }
1149
1150 static u32 pegasus_get_link(struct net_device *dev)
1151 {
1152         pegasus_t *pegasus = netdev_priv(dev);
1153         return mii_link_ok(&pegasus->mii);
1154 }
1155
1156 static u32 pegasus_get_msglevel(struct net_device *dev)
1157 {
1158         pegasus_t *pegasus = netdev_priv(dev);
1159         return pegasus->msg_enable;
1160 }
1161
1162 static void pegasus_set_msglevel(struct net_device *dev, u32 v)
1163 {
1164         pegasus_t *pegasus = netdev_priv(dev);
1165         pegasus->msg_enable = v;
1166 }
1167
1168 static struct ethtool_ops ops = {
1169         .get_drvinfo = pegasus_get_drvinfo,
1170         .get_settings = pegasus_get_settings,
1171         .set_settings = pegasus_set_settings,
1172         .nway_reset = pegasus_nway_reset,
1173         .get_link = pegasus_get_link,
1174         .get_msglevel = pegasus_get_msglevel,
1175         .set_msglevel = pegasus_set_msglevel,
1176         .get_wol = pegasus_get_wol,
1177         .set_wol = pegasus_set_wol,
1178 };
1179
1180 static int pegasus_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
1181 {
1182         __u16 *data = (__u16 *) & rq->ifr_ifru;
1183         pegasus_t *pegasus = netdev_priv(net);
1184         int res;
1185
1186         switch (cmd) {
1187         case SIOCDEVPRIVATE:
1188                 data[0] = pegasus->phy;
1189         case SIOCDEVPRIVATE + 1:
1190                 read_mii_word(pegasus, data[0], data[1] & 0x1f, &data[3]);
1191                 res = 0;
1192                 break;
1193         case SIOCDEVPRIVATE + 2:
1194                 if (!capable(CAP_NET_ADMIN))
1195                         return -EPERM;
1196                 write_mii_word(pegasus, pegasus->phy, data[1] & 0x1f, data[2]);
1197                 res = 0;
1198                 break;
1199         default:
1200                 res = -EOPNOTSUPP;
1201         }
1202         return res;
1203 }
1204
1205 static void pegasus_set_multicast(struct net_device *net)
1206 {
1207         pegasus_t *pegasus = netdev_priv(net);
1208
1209         if (net->flags & IFF_PROMISC) {
1210                 pegasus->eth_regs[EthCtrl2] |= RX_PROMISCUOUS;
1211                 if (netif_msg_link(pegasus))
1212                         pr_info("%s: Promiscuous mode enabled.\n", net->name);
1213         } else if (net->mc_count ||
1214                    (net->flags & IFF_ALLMULTI)) {
1215                 pegasus->eth_regs[EthCtrl0] |= RX_MULTICAST;
1216                 pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1217                 if (netif_msg_link(pegasus))
1218                         pr_info("%s: set allmulti\n", net->name);
1219         } else {
1220                 pegasus->eth_regs[EthCtrl0] &= ~RX_MULTICAST;
1221                 pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1222         }
1223
1224         pegasus->flags |= ETH_REGS_CHANGE;
1225         ctrl_callback(pegasus->ctrl_urb, NULL);
1226 }
1227
1228 static __u8 mii_phy_probe(pegasus_t * pegasus)
1229 {
1230         int i;
1231         __u16 tmp;
1232
1233         for (i = 0; i < 32; i++) {
1234                 read_mii_word(pegasus, i, MII_BMSR, &tmp);
1235                 if (tmp == 0 || tmp == 0xffff || (tmp & BMSR_MEDIA) == 0)
1236                         continue;
1237                 else
1238                         return i;
1239         }
1240
1241         return 0xff;
1242 }
1243
1244 static inline void setup_pegasus_II(pegasus_t * pegasus)
1245 {
1246         __u8 data = 0xa5;
1247
1248         set_register(pegasus, Reg1d, 0);
1249         set_register(pegasus, Reg7b, 1);
1250         mdelay(100);
1251         if ((pegasus->features & HAS_HOME_PNA) && mii_mode)
1252                 set_register(pegasus, Reg7b, 0);
1253         else
1254                 set_register(pegasus, Reg7b, 2);
1255
1256         set_register(pegasus, 0x83, data);
1257         get_registers(pegasus, 0x83, 1, &data);
1258
1259         if (data == 0xa5) {
1260                 pegasus->chip = 0x8513;
1261         } else {
1262                 pegasus->chip = 0;
1263         }
1264
1265         set_register(pegasus, 0x80, 0xc0);
1266         set_register(pegasus, 0x83, 0xff);
1267         set_register(pegasus, 0x84, 0x01);
1268
1269         if (pegasus->features & HAS_HOME_PNA && mii_mode)
1270                 set_register(pegasus, Reg81, 6);
1271         else
1272                 set_register(pegasus, Reg81, 2);
1273 }
1274
1275
1276 static struct workqueue_struct *pegasus_workqueue = NULL;
1277 #define CARRIER_CHECK_DELAY (2 * HZ)
1278
1279 static void check_carrier(void *data)
1280 {
1281         pegasus_t *pegasus = data;
1282         set_carrier(pegasus->net);
1283         if (!(pegasus->flags & PEGASUS_UNPLUG)) {
1284                 queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1285                         CARRIER_CHECK_DELAY);
1286         }
1287 }
1288
1289 static int pegasus_probe(struct usb_interface *intf,
1290                          const struct usb_device_id *id)
1291 {
1292         struct usb_device *dev = interface_to_usbdev(intf);
1293         struct net_device *net;
1294         pegasus_t *pegasus;
1295         int dev_index = id - pegasus_ids;
1296         int res = -ENOMEM;
1297
1298         usb_get_dev(dev);
1299         net = alloc_etherdev(sizeof(struct pegasus));
1300         if (!net) {
1301                 dev_err(&intf->dev, "can't allocate %s\n", "device");
1302                 goto out;
1303         }
1304
1305         pegasus = netdev_priv(net);
1306         memset(pegasus, 0, sizeof (struct pegasus));
1307         pegasus->dev_index = dev_index;
1308         init_waitqueue_head(&pegasus->ctrl_wait);
1309
1310         if (!alloc_urbs(pegasus)) {
1311                 dev_err(&intf->dev, "can't allocate %s\n", "urbs");
1312                 goto out1;
1313         }
1314
1315         tasklet_init(&pegasus->rx_tl, rx_fixup, (unsigned long) pegasus);
1316
1317         INIT_WORK(&pegasus->carrier_check, check_carrier, pegasus);
1318
1319         pegasus->intf = intf;
1320         pegasus->usb = dev;
1321         pegasus->net = net;
1322         SET_MODULE_OWNER(net);
1323         net->open = pegasus_open;
1324         net->stop = pegasus_close;
1325         net->watchdog_timeo = PEGASUS_TX_TIMEOUT;
1326         net->tx_timeout = pegasus_tx_timeout;
1327         net->do_ioctl = pegasus_ioctl;
1328         net->hard_start_xmit = pegasus_start_xmit;
1329         net->set_multicast_list = pegasus_set_multicast;
1330         net->get_stats = pegasus_netdev_stats;
1331         SET_ETHTOOL_OPS(net, &ops);
1332         pegasus->mii.dev = net;
1333         pegasus->mii.mdio_read = mdio_read;
1334         pegasus->mii.mdio_write = mdio_write;
1335         pegasus->mii.phy_id_mask = 0x1f;
1336         pegasus->mii.reg_num_mask = 0x1f;
1337         spin_lock_init(&pegasus->rx_pool_lock);
1338         pegasus->msg_enable = netif_msg_init (msg_level, NETIF_MSG_DRV
1339                                 | NETIF_MSG_PROBE | NETIF_MSG_LINK);
1340
1341         pegasus->features = usb_dev_id[dev_index].private;
1342         get_interrupt_interval(pegasus);
1343         if (reset_mac(pegasus)) {
1344                 dev_err(&intf->dev, "can't reset MAC\n");
1345                 res = -EIO;
1346                 goto out2;
1347         }
1348         set_ethernet_addr(pegasus);
1349         fill_skb_pool(pegasus);
1350         if (pegasus->features & PEGASUS_II) {
1351                 dev_info(&intf->dev, "setup Pegasus II specific registers\n");
1352                 setup_pegasus_II(pegasus);
1353         }
1354         pegasus->phy = mii_phy_probe(pegasus);
1355         if (pegasus->phy == 0xff) {
1356                 dev_warn(&intf->dev, "can't locate MII phy, using default\n");
1357                 pegasus->phy = 1;
1358         }
1359         pegasus->mii.phy_id = pegasus->phy;
1360         usb_set_intfdata(intf, pegasus);
1361         SET_NETDEV_DEV(net, &intf->dev);
1362         pegasus_reset_wol(net);
1363         res = register_netdev(net);
1364         if (res)
1365                 goto out3;
1366         queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1367                                 CARRIER_CHECK_DELAY);
1368
1369         dev_info(&intf->dev, "%s, %s, %02x:%02x:%02x:%02x:%02x:%02x\n",
1370                 net->name,
1371                 usb_dev_id[dev_index].name,
1372                 net->dev_addr [0], net->dev_addr [1],
1373                 net->dev_addr [2], net->dev_addr [3],
1374                 net->dev_addr [4], net->dev_addr [5]);
1375         return 0;
1376
1377 out3:
1378         usb_set_intfdata(intf, NULL);
1379         free_skb_pool(pegasus);
1380 out2:
1381         free_all_urbs(pegasus);
1382 out1:
1383         free_netdev(net);
1384 out:
1385         usb_put_dev(dev);
1386         return res;
1387 }
1388
1389 static void pegasus_disconnect(struct usb_interface *intf)
1390 {
1391         struct pegasus *pegasus = usb_get_intfdata(intf);
1392
1393         usb_set_intfdata(intf, NULL);
1394         if (!pegasus) {
1395                 dev_dbg(&intf->dev, "unregistering non-bound device?\n");
1396                 return;
1397         }
1398
1399         pegasus->flags |= PEGASUS_UNPLUG;
1400         cancel_delayed_work(&pegasus->carrier_check);
1401         unregister_netdev(pegasus->net);
1402         usb_put_dev(interface_to_usbdev(intf));
1403         unlink_all_urbs(pegasus);
1404         free_all_urbs(pegasus);
1405         free_skb_pool(pegasus);
1406         if (pegasus->rx_skb)
1407                 dev_kfree_skb(pegasus->rx_skb);
1408         free_netdev(pegasus->net);
1409 }
1410
1411 static int pegasus_suspend (struct usb_interface *intf, pm_message_t message)
1412 {
1413         struct pegasus *pegasus = usb_get_intfdata(intf);
1414
1415         netif_device_detach (pegasus->net);
1416         cancel_delayed_work(&pegasus->carrier_check);
1417         if (netif_running(pegasus->net)) {
1418                 usb_kill_urb(pegasus->rx_urb);
1419                 usb_kill_urb(pegasus->intr_urb);
1420         }
1421         return 0;
1422 }
1423
1424 static int pegasus_resume (struct usb_interface *intf)
1425 {
1426         struct pegasus *pegasus = usb_get_intfdata(intf);
1427
1428         netif_device_attach (pegasus->net);
1429         if (netif_running(pegasus->net)) {
1430                 pegasus->rx_urb->status = 0;
1431                 pegasus->rx_urb->actual_length = 0;
1432                 read_bulk_callback(pegasus->rx_urb, NULL);
1433
1434                 pegasus->intr_urb->status = 0;
1435                 pegasus->intr_urb->actual_length = 0;
1436                 intr_callback(pegasus->intr_urb, NULL);
1437         }
1438         queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1439                                 CARRIER_CHECK_DELAY);
1440         return 0;
1441 }
1442
1443 static struct usb_driver pegasus_driver = {
1444         .name = driver_name,
1445         .probe = pegasus_probe,
1446         .disconnect = pegasus_disconnect,
1447         .id_table = pegasus_ids,
1448         .suspend = pegasus_suspend,
1449         .resume = pegasus_resume,
1450 };
1451
1452 static void parse_id(char *id)
1453 {
1454         unsigned int vendor_id=0, device_id=0, flags=0, i=0;
1455         char *token, *name=NULL;
1456
1457         if ((token = strsep(&id, ":")) != NULL)
1458                 name = token;
1459         /* name now points to a null terminated string*/
1460         if ((token = strsep(&id, ":")) != NULL)
1461                 vendor_id = simple_strtoul(token, NULL, 16);
1462         if ((token = strsep(&id, ":")) != NULL)
1463                 device_id = simple_strtoul(token, NULL, 16);
1464         flags = simple_strtoul(id, NULL, 16);
1465         pr_info("%s: new device %s, vendor ID 0x%04x, device ID 0x%04x, flags: 0x%x\n",
1466                 driver_name, name, vendor_id, device_id, flags);
1467
1468         if (vendor_id > 0x10000 || vendor_id == 0)
1469                 return;
1470         if (device_id > 0x10000 || device_id == 0)
1471                 return;
1472
1473         for (i=0; usb_dev_id[i].name; i++);
1474         usb_dev_id[i].name = name;
1475         usb_dev_id[i].vendor = vendor_id;
1476         usb_dev_id[i].device = device_id;
1477         usb_dev_id[i].private = flags;
1478         pegasus_ids[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
1479         pegasus_ids[i].idVendor = vendor_id;
1480         pegasus_ids[i].idProduct = device_id;
1481 }
1482
1483 static int __init pegasus_init(void)
1484 {
1485         pr_info("%s: %s, " DRIVER_DESC "\n", driver_name, DRIVER_VERSION);
1486         if (devid)
1487                 parse_id(devid);
1488         pegasus_workqueue = create_singlethread_workqueue("pegasus");
1489         if (!pegasus_workqueue)
1490                 return -ENOMEM;
1491         return usb_register(&pegasus_driver);
1492 }
1493
1494 static void __exit pegasus_exit(void)
1495 {
1496         destroy_workqueue(pegasus_workqueue);
1497         usb_deregister(&pegasus_driver);
1498 }
1499
1500 module_init(pegasus_init);
1501 module_exit(pegasus_exit);