git.oblomov.eu Git - linux-2.6/blob - drivers/net/usb/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 "v0.6.14 (2006/09/27)"
  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)
 100 {
 101         pegasus_t *pegasus = urb->context;
 102         int status = urb->status;
 103
 104         if (!pegasus)
 105                 return;
 106
 107         switch (status) {
 108         case 0:
 109                 if (pegasus->flags & ETH_REGS_CHANGE) {
 110                         pegasus->flags &= ~ETH_REGS_CHANGE;
 111                         pegasus->flags |= ETH_REGS_CHANGED;
 112                         update_eth_regs_async(pegasus);
 113                         return;
 114                 }
 115                 break;
 116         case -EINPROGRESS:
 117                 return;
 118         case -ENOENT:
 119                 break;
 120         default:
 121                 if (netif_msg_drv(pegasus) && printk_ratelimit())
 122                         dev_dbg(&pegasus->intf->dev, "%s, status %d\n",
 123                                 __func__, status);
 124         }
 125         pegasus->flags &= ~ETH_REGS_CHANGED;
 126         wake_up(&pegasus->ctrl_wait);
 127 }
 128
 129 static int get_registers(pegasus_t * pegasus, __u16 indx, __u16 size,
 130                          void *data)
 131 {
 132         int ret;
 133         char *buffer;
 134         DECLARE_WAITQUEUE(wait, current);
 135
 136         buffer = kmalloc(size, GFP_KERNEL);
 137         if (!buffer) {
 138                 if (netif_msg_drv(pegasus))
 139                         dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
 140                                         __func__);
 141                 return -ENOMEM;
 142         }
 143         add_wait_queue(&pegasus->ctrl_wait, &wait);
 144         set_current_state(TASK_UNINTERRUPTIBLE);
 145         while (pegasus->flags & ETH_REGS_CHANGED)
 146                 schedule();
 147         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 148         set_current_state(TASK_RUNNING);
 149
 150         pegasus->dr.bRequestType = PEGASUS_REQT_READ;
 151         pegasus->dr.bRequest = PEGASUS_REQ_GET_REGS;
 152         pegasus->dr.wValue = cpu_to_le16(0);
 153         pegasus->dr.wIndex = cpu_to_le16p(&indx);
 154         pegasus->dr.wLength = cpu_to_le16p(&size);
 155         pegasus->ctrl_urb->transfer_buffer_length = size;
 156
 157         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 158                              usb_rcvctrlpipe(pegasus->usb, 0),
 159                              (char *) &pegasus->dr,
 160                              buffer, size, ctrl_callback, pegasus);
 161
 162         add_wait_queue(&pegasus->ctrl_wait, &wait);
 163         set_current_state(TASK_UNINTERRUPTIBLE);
 164
 165         /* using ATOMIC, we'd never wake up if we slept */
 166         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 167                 set_current_state(TASK_RUNNING);
 168                 if (ret == -ENODEV)
 169                         netif_device_detach(pegasus->net);
 170                 if (netif_msg_drv(pegasus) && printk_ratelimit())
 171                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 172                                         __func__, ret);
 173                 goto out;
 174         }
 175
 176         schedule();
 177 out:
 178         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 179         memcpy(data, buffer, size);
 180         kfree(buffer);
 181
 182         return ret;
 183 }
 184
 185 static int set_registers(pegasus_t * pegasus, __u16 indx, __u16 size,
 186                          void *data)
 187 {
 188         int ret;
 189         char *buffer;
 190         DECLARE_WAITQUEUE(wait, current);
 191
 192         buffer = kmalloc(size, GFP_KERNEL);
 193         if (!buffer) {
 194                 if (netif_msg_drv(pegasus))
 195                         dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
 196                                         __func__);
 197                 return -ENOMEM;
 198         }
 199         memcpy(buffer, data, size);
 200
 201         add_wait_queue(&pegasus->ctrl_wait, &wait);
 202         set_current_state(TASK_UNINTERRUPTIBLE);
 203         while (pegasus->flags & ETH_REGS_CHANGED)
 204                 schedule();
 205         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 206         set_current_state(TASK_RUNNING);
 207
 208         pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
 209         pegasus->dr.bRequest = PEGASUS_REQ_SET_REGS;
 210         pegasus->dr.wValue = cpu_to_le16(0);
 211         pegasus->dr.wIndex = cpu_to_le16p(&indx);
 212         pegasus->dr.wLength = cpu_to_le16p(&size);
 213         pegasus->ctrl_urb->transfer_buffer_length = size;
 214
 215         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 216                              usb_sndctrlpipe(pegasus->usb, 0),
 217                              (char *) &pegasus->dr,
 218                              buffer, size, ctrl_callback, pegasus);
 219
 220         add_wait_queue(&pegasus->ctrl_wait, &wait);
 221         set_current_state(TASK_UNINTERRUPTIBLE);
 222
 223         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 224                 if (ret == -ENODEV)
 225                         netif_device_detach(pegasus->net);
 226                 if (netif_msg_drv(pegasus))
 227                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 228                                         __func__, ret);
 229                 goto out;
 230         }
 231
 232         schedule();
 233 out:
 234         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 235         kfree(buffer);
 236
 237         return ret;
 238 }
 239
 240 static int set_register(pegasus_t * pegasus, __u16 indx, __u8 data)
 241 {
 242         int ret;
 243         char *tmp;
 244         DECLARE_WAITQUEUE(wait, current);
 245
 246         tmp = kmalloc(1, GFP_KERNEL);
 247         if (!tmp) {
 248                 if (netif_msg_drv(pegasus))
 249                         dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
 250                                         __func__);
 251                 return -ENOMEM;
 252         }
 253         memcpy(tmp, &data, 1);
 254         add_wait_queue(&pegasus->ctrl_wait, &wait);
 255         set_current_state(TASK_UNINTERRUPTIBLE);
 256         while (pegasus->flags & ETH_REGS_CHANGED)
 257                 schedule();
 258         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 259         set_current_state(TASK_RUNNING);
 260
 261         pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
 262         pegasus->dr.bRequest = PEGASUS_REQ_SET_REG;
 263         pegasus->dr.wValue = cpu_to_le16(data);
 264         pegasus->dr.wIndex = cpu_to_le16p(&indx);
 265         pegasus->dr.wLength = cpu_to_le16(1);
 266         pegasus->ctrl_urb->transfer_buffer_length = 1;
 267
 268         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 269                              usb_sndctrlpipe(pegasus->usb, 0),
 270                              (char *) &pegasus->dr,
 271                              tmp, 1, ctrl_callback, pegasus);
 272
 273         add_wait_queue(&pegasus->ctrl_wait, &wait);
 274         set_current_state(TASK_UNINTERRUPTIBLE);
 275
 276         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 277                 if (ret == -ENODEV)
 278                         netif_device_detach(pegasus->net);
 279                 if (netif_msg_drv(pegasus) && printk_ratelimit())
 280                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 281                                         __func__, ret);
 282                 goto out;
 283         }
 284
 285         schedule();
 286 out:
 287         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 288         kfree(tmp);
 289
 290         return ret;
 291 }
 292
 293 static int update_eth_regs_async(pegasus_t * pegasus)
 294 {
 295         int ret;
 296
 297         pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
 298         pegasus->dr.bRequest = PEGASUS_REQ_SET_REGS;
 299         pegasus->dr.wValue = 0;
 300         pegasus->dr.wIndex = cpu_to_le16(EthCtrl0);
 301         pegasus->dr.wLength = cpu_to_le16(3);
 302         pegasus->ctrl_urb->transfer_buffer_length = 3;
 303
 304         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 305                              usb_sndctrlpipe(pegasus->usb, 0),
 306                              (char *) &pegasus->dr,
 307                              pegasus->eth_regs, 3, ctrl_callback, pegasus);
 308
 309         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 310                 if (ret == -ENODEV)
 311                         netif_device_detach(pegasus->net);
 312                 if (netif_msg_drv(pegasus))
 313                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 314                                         __func__, ret);
 315         }
 316
 317         return ret;
 318 }
 319
 320 /* Returns 0 on success, error on failure */
 321 static int read_mii_word(pegasus_t * pegasus, __u8 phy, __u8 indx, __u16 * regd)
 322 {
 323         int i;
 324         __u8 data[4] = { phy, 0, 0, indx };
 325         __le16 regdi;
 326         int ret;
 327
 328         set_register(pegasus, PhyCtrl, 0);
 329         set_registers(pegasus, PhyAddr, sizeof (data), data);
 330         set_register(pegasus, PhyCtrl, (indx | PHY_READ));
 331         for (i = 0; i < REG_TIMEOUT; i++) {
 332                 ret = get_registers(pegasus, PhyCtrl, 1, data);
 333                 if (ret == -ESHUTDOWN)
 334                         goto fail;
 335                 if (data[0] & PHY_DONE)
 336                         break;
 337         }
 338         if (i < REG_TIMEOUT) {
 339                 ret = get_registers(pegasus, PhyData, 2, &regdi);
 340                 *regd = le16_to_cpu(regdi);
 341                 return ret;
 342         }
 343 fail:
 344         if (netif_msg_drv(pegasus))
 345                 dev_warn(&pegasus->intf->dev, "%s failed\n", __func__);
 346
 347         return ret;
 348 }
 349
 350 static int mdio_read(struct net_device *dev, int phy_id, int loc)
 351 {
 352         pegasus_t *pegasus = (pegasus_t *) netdev_priv(dev);
 353         u16 res;
 354
 355         read_mii_word(pegasus, phy_id, loc, &res);
 356         return (int)res;
 357 }
 358
 359 static int write_mii_word(pegasus_t * pegasus, __u8 phy, __u8 indx, __u16 regd)
 360 {
 361         int i;
 362         __u8 data[4] = { phy, 0, 0, indx };
 363         int ret;
 364
 365         data[1] = (u8) regd;
 366         data[2] = (u8) (regd >> 8);
 367         set_register(pegasus, PhyCtrl, 0);
 368         set_registers(pegasus, PhyAddr, sizeof(data), data);
 369         set_register(pegasus, PhyCtrl, (indx | PHY_WRITE));
 370         for (i = 0; i < REG_TIMEOUT; i++) {
 371                 ret = get_registers(pegasus, PhyCtrl, 1, data);
 372                 if (ret == -ESHUTDOWN)
 373                         goto fail;
 374                 if (data[0] & PHY_DONE)
 375                         break;
 376         }
 377         if (i < REG_TIMEOUT)
 378                 return ret;
 379
 380 fail:
 381         if (netif_msg_drv(pegasus))
 382                 dev_warn(&pegasus->intf->dev, "%s failed\n", __func__);
 383         return -ETIMEDOUT;
 384 }
 385
 386 static void mdio_write(struct net_device *dev, int phy_id, int loc, int val)
 387 {
 388         pegasus_t *pegasus = (pegasus_t *) netdev_priv(dev);
 389
 390         write_mii_word(pegasus, phy_id, loc, val);
 391 }
 392
 393 static int read_eprom_word(pegasus_t * pegasus, __u8 index, __u16 * retdata)
 394 {
 395         int i;
 396         __u8 tmp;
 397         __le16 retdatai;
 398         int ret;
 399
 400         set_register(pegasus, EpromCtrl, 0);
 401         set_register(pegasus, EpromOffset, index);
 402         set_register(pegasus, EpromCtrl, EPROM_READ);
 403
 404         for (i = 0; i < REG_TIMEOUT; i++) {
 405                 ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
 406                 if (tmp & EPROM_DONE)
 407                         break;
 408                 if (ret == -ESHUTDOWN)
 409                         goto fail;
 410         }
 411         if (i < REG_TIMEOUT) {
 412                 ret = get_registers(pegasus, EpromData, 2, &retdatai);
 413                 *retdata = le16_to_cpu(retdatai);
 414                 return ret;
 415         }
 416
 417 fail:
 418         if (netif_msg_drv(pegasus))
 419                 dev_warn(&pegasus->intf->dev, "%s failed\n", __func__);
 420         return -ETIMEDOUT;
 421 }
 422
 423 #ifdef  PEGASUS_WRITE_EEPROM
 424 static inline void enable_eprom_write(pegasus_t * pegasus)
 425 {
 426         __u8 tmp;
 427         int ret;
 428
 429         get_registers(pegasus, EthCtrl2, 1, &tmp);
 430         set_register(pegasus, EthCtrl2, tmp | EPROM_WR_ENABLE);
 431 }
 432
 433 static inline void disable_eprom_write(pegasus_t * pegasus)
 434 {
 435         __u8 tmp;
 436         int ret;
 437
 438         get_registers(pegasus, EthCtrl2, 1, &tmp);
 439         set_register(pegasus, EpromCtrl, 0);
 440         set_register(pegasus, EthCtrl2, tmp & ~EPROM_WR_ENABLE);
 441 }
 442
 443 static int write_eprom_word(pegasus_t * pegasus, __u8 index, __u16 data)
 444 {
 445         int i;
 446         __u8 tmp, d[4] = { 0x3f, 0, 0, EPROM_WRITE };
 447         int ret;
 448
 449         set_registers(pegasus, EpromOffset, 4, d);
 450         enable_eprom_write(pegasus);
 451         set_register(pegasus, EpromOffset, index);
 452         set_registers(pegasus, EpromData, 2, &data);
 453         set_register(pegasus, EpromCtrl, EPROM_WRITE);
 454
 455         for (i = 0; i < REG_TIMEOUT; i++) {
 456                 ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
 457                 if (ret == -ESHUTDOWN)
 458                         goto fail;
 459                 if (tmp & EPROM_DONE)
 460                         break;
 461         }
 462         disable_eprom_write(pegasus);
 463         if (i < REG_TIMEOUT)
 464                 return ret;
 465 fail:
 466         if (netif_msg_drv(pegasus))
 467                 dev_warn(&pegasus->intf->dev, "%s failed\n", __func__);
 468         return -ETIMEDOUT;
 469 }
 470 #endif                          /* PEGASUS_WRITE_EEPROM */
 471
 472 static inline void get_node_id(pegasus_t * pegasus, __u8 * id)
 473 {
 474         int i;
 475         __u16 w16;
 476
 477         for (i = 0; i < 3; i++) {
 478                 read_eprom_word(pegasus, i, &w16);
 479                 ((__le16 *) id)[i] = cpu_to_le16p(&w16);
 480         }
 481 }
 482
 483 static void set_ethernet_addr(pegasus_t * pegasus)
 484 {
 485         __u8 node_id[6];
 486
 487         if (pegasus->features & PEGASUS_II) {
 488                 get_registers(pegasus, 0x10, sizeof(node_id), node_id);
 489         } else {
 490                 get_node_id(pegasus, node_id);
 491                 set_registers(pegasus, EthID, sizeof (node_id), node_id);
 492         }
 493         memcpy(pegasus->net->dev_addr, node_id, sizeof (node_id));
 494 }
 495
 496 static inline int reset_mac(pegasus_t * pegasus)
 497 {
 498         __u8 data = 0x8;
 499         int i;
 500
 501         set_register(pegasus, EthCtrl1, data);
 502         for (i = 0; i < REG_TIMEOUT; i++) {
 503                 get_registers(pegasus, EthCtrl1, 1, &data);
 504                 if (~data & 0x08) {
 505                         if (loopback & 1)
 506                                 break;
 507                         if (mii_mode && (pegasus->features & HAS_HOME_PNA))
 508                                 set_register(pegasus, Gpio1, 0x34);
 509                         else
 510                                 set_register(pegasus, Gpio1, 0x26);
 511                         set_register(pegasus, Gpio0, pegasus->features);
 512                         set_register(pegasus, Gpio0, DEFAULT_GPIO_SET);
 513                         break;
 514                 }
 515         }
 516         if (i == REG_TIMEOUT)
 517                 return -ETIMEDOUT;
 518
 519         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
 520             usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
 521                 set_register(pegasus, Gpio0, 0x24);
 522                 set_register(pegasus, Gpio0, 0x26);
 523         }
 524         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_ELCON) {
 525                 __u16 auxmode;
 526                 read_mii_word(pegasus, 3, 0x1b, &auxmode);
 527                 write_mii_word(pegasus, 3, 0x1b, auxmode | 4);
 528         }
 529
 530         return 0;
 531 }
 532
 533 static int enable_net_traffic(struct net_device *dev, struct usb_device *usb)
 534 {
 535         __u16 linkpart;
 536         __u8 data[4];
 537         pegasus_t *pegasus = netdev_priv(dev);
 538         int ret;
 539
 540         read_mii_word(pegasus, pegasus->phy, MII_LPA, &linkpart);
 541         data[0] = 0xc9;
 542         data[1] = 0;
 543         if (linkpart & (ADVERTISE_100FULL | ADVERTISE_10FULL))
 544                 data[1] |= 0x20;        /* set full duplex */
 545         if (linkpart & (ADVERTISE_100FULL | ADVERTISE_100HALF))
 546                 data[1] |= 0x10;        /* set 100 Mbps */
 547         if (mii_mode)
 548                 data[1] = 0;
 549         data[2] = (loopback & 1) ? 0x09 : 0x01;
 550
 551         memcpy(pegasus->eth_regs, data, sizeof (data));
 552         ret = set_registers(pegasus, EthCtrl0, 3, data);
 553
 554         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
 555             usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS2 ||
 556             usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
 557                 u16 auxmode;
 558                 read_mii_word(pegasus, 0, 0x1b, &auxmode);
 559                 write_mii_word(pegasus, 0, 0x1b, auxmode | 4);
 560         }
 561
 562         return ret;
 563 }
 564
 565 static void fill_skb_pool(pegasus_t * pegasus)
 566 {
 567         int i;
 568
 569         for (i = 0; i < RX_SKBS; i++) {
 570                 if (pegasus->rx_pool[i])
 571                         continue;
 572                 pegasus->rx_pool[i] = dev_alloc_skb(PEGASUS_MTU + 2);
 573                 /*
 574                  ** we give up if the allocation fail. the tasklet will be
 575                  ** rescheduled again anyway...
 576                  */
 577                 if (pegasus->rx_pool[i] == NULL)
 578                         return;
 579                 skb_reserve(pegasus->rx_pool[i], 2);
 580         }
 581 }
 582
 583 static void free_skb_pool(pegasus_t * pegasus)
 584 {
 585         int i;
 586
 587         for (i = 0; i < RX_SKBS; i++) {
 588                 if (pegasus->rx_pool[i]) {
 589                         dev_kfree_skb(pegasus->rx_pool[i]);
 590                         pegasus->rx_pool[i] = NULL;
 591                 }
 592         }
 593 }
 594
 595 static inline struct sk_buff *pull_skb(pegasus_t * pegasus)
 596 {
 597         int i;
 598         struct sk_buff *skb;
 599
 600         for (i = 0; i < RX_SKBS; i++) {
 601                 if (likely(pegasus->rx_pool[i] != NULL)) {
 602                         skb = pegasus->rx_pool[i];
 603                         pegasus->rx_pool[i] = NULL;
 604                         return skb;
 605                 }
 606         }
 607         return NULL;
 608 }
 609
 610 static void read_bulk_callback(struct urb *urb)
 611 {
 612         pegasus_t *pegasus = urb->context;
 613         struct net_device *net;
 614         int rx_status, count = urb->actual_length;
 615         int status = urb->status;
 616         u8 *buf = urb->transfer_buffer;
 617         __u16 pkt_len;
 618
 619         if (!pegasus)
 620                 return;
 621
 622         net = pegasus->net;
 623         if (!netif_device_present(net) || !netif_running(net))
 624                 return;
 625
 626         switch (status) {
 627         case 0:
 628                 break;
 629         case -ETIME:
 630                 if (netif_msg_rx_err(pegasus))
 631                         pr_debug("%s: reset MAC\n", net->name);
 632                 pegasus->flags &= ~PEGASUS_RX_BUSY;
 633                 break;
 634         case -EPIPE:            /* stall, or disconnect from TT */
 635                 /* FIXME schedule work to clear the halt */
 636                 if (netif_msg_rx_err(pegasus))
 637                         printk(KERN_WARNING "%s: no rx stall recovery\n",
 638                                         net->name);
 639                 return;
 640         case -ENOENT:
 641         case -ECONNRESET:
 642         case -ESHUTDOWN:
 643                 if (netif_msg_ifdown(pegasus))
 644                         pr_debug("%s: rx unlink, %d\n", net->name, status);
 645                 return;
 646         default:
 647                 if (netif_msg_rx_err(pegasus))
 648                         pr_debug("%s: RX status %d\n", net->name, status);
 649                 goto goon;
 650         }
 651
 652         if (!count || count < 4)
 653                 goto goon;
 654
 655         rx_status = buf[count - 2];
 656         if (rx_status & 0x1e) {
 657                 if (netif_msg_rx_err(pegasus))
 658                         pr_debug("%s: RX packet error %x\n",
 659                                         net->name, rx_status);
 660                 pegasus->stats.rx_errors++;
 661                 if (rx_status & 0x06)   // long or runt
 662                         pegasus->stats.rx_length_errors++;
 663                 if (rx_status & 0x08)
 664                         pegasus->stats.rx_crc_errors++;
 665                 if (rx_status & 0x10)   // extra bits
 666                         pegasus->stats.rx_frame_errors++;
 667                 goto goon;
 668         }
 669         if (pegasus->chip == 0x8513) {
 670                 pkt_len = le32_to_cpu(*(__le32 *)urb->transfer_buffer);
 671                 pkt_len &= 0x0fff;
 672                 pegasus->rx_skb->data += 2;
 673         } else {
 674                 pkt_len = buf[count - 3] << 8;
 675                 pkt_len += buf[count - 4];
 676                 pkt_len &= 0xfff;
 677                 pkt_len -= 8;
 678         }
 679
 680         /*
 681          * If the packet is unreasonably long, quietly drop it rather than
 682          * kernel panicing by calling skb_put.
 683          */
 684         if (pkt_len > PEGASUS_MTU)
 685                 goto goon;
 686
 687         /*
 688          * at this point we are sure pegasus->rx_skb != NULL
 689          * so we go ahead and pass up the packet.
 690          */
 691         skb_put(pegasus->rx_skb, pkt_len);
 692         pegasus->rx_skb->protocol = eth_type_trans(pegasus->rx_skb, net);
 693         netif_rx(pegasus->rx_skb);
 694         pegasus->stats.rx_packets++;
 695         pegasus->stats.rx_bytes += pkt_len;
 696
 697         if (pegasus->flags & PEGASUS_UNPLUG)
 698                 return;
 699
 700         spin_lock(&pegasus->rx_pool_lock);
 701         pegasus->rx_skb = pull_skb(pegasus);
 702         spin_unlock(&pegasus->rx_pool_lock);
 703
 704         if (pegasus->rx_skb == NULL)
 705                 goto tl_sched;
 706 goon:
 707         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
 708                           usb_rcvbulkpipe(pegasus->usb, 1),
 709                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
 710                           read_bulk_callback, pegasus);
 711         rx_status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);
 712         if (rx_status == -ENODEV)
 713                 netif_device_detach(pegasus->net);
 714         else if (rx_status) {
 715                 pegasus->flags |= PEGASUS_RX_URB_FAIL;
 716                 goto tl_sched;
 717         } else {
 718                 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
 719         }
 720
 721         return;
 722
 723 tl_sched:
 724         tasklet_schedule(&pegasus->rx_tl);
 725 }
 726
 727 static void rx_fixup(unsigned long data)
 728 {
 729         pegasus_t *pegasus;
 730         unsigned long flags;
 731         int status;
 732
 733         pegasus = (pegasus_t *) data;
 734         if (pegasus->flags & PEGASUS_UNPLUG)
 735                 return;
 736
 737         spin_lock_irqsave(&pegasus->rx_pool_lock, flags);
 738         fill_skb_pool(pegasus);
 739         if (pegasus->flags & PEGASUS_RX_URB_FAIL)
 740                 if (pegasus->rx_skb)
 741                         goto try_again;
 742         if (pegasus->rx_skb == NULL) {
 743                 pegasus->rx_skb = pull_skb(pegasus);
 744         }
 745         if (pegasus->rx_skb == NULL) {
 746                 if (netif_msg_rx_err(pegasus))
 747                         printk(KERN_WARNING "%s: low on memory\n",
 748                                         pegasus->net->name);
 749                 tasklet_schedule(&pegasus->rx_tl);
 750                 goto done;
 751         }
 752         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
 753                           usb_rcvbulkpipe(pegasus->usb, 1),
 754                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
 755                           read_bulk_callback, pegasus);
 756 try_again:
 757         status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);
 758         if (status == -ENODEV)
 759                 netif_device_detach(pegasus->net);
 760         else if (status) {
 761                 pegasus->flags |= PEGASUS_RX_URB_FAIL;
 762                 tasklet_schedule(&pegasus->rx_tl);
 763         } else {
 764                 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
 765         }
 766 done:
 767         spin_unlock_irqrestore(&pegasus->rx_pool_lock, flags);
 768 }
 769
 770 static void write_bulk_callback(struct urb *urb)
 771 {
 772         pegasus_t *pegasus = urb->context;
 773         struct net_device *net;
 774         int status = urb->status;
 775
 776         if (!pegasus)
 777                 return;
 778
 779         net = pegasus->net;
 780
 781         if (!netif_device_present(net) || !netif_running(net))
 782                 return;
 783
 784         switch (status) {
 785         case -EPIPE:
 786                 /* FIXME schedule_work() to clear the tx halt */
 787                 netif_stop_queue(net);
 788                 if (netif_msg_tx_err(pegasus))
 789                         printk(KERN_WARNING "%s: no tx stall recovery\n",
 790                                         net->name);
 791                 return;
 792         case -ENOENT:
 793         case -ECONNRESET:
 794         case -ESHUTDOWN:
 795                 if (netif_msg_ifdown(pegasus))
 796                         pr_debug("%s: tx unlink, %d\n", net->name, status);
 797                 return;
 798         default:
 799                 if (netif_msg_tx_err(pegasus))
 800                         pr_info("%s: TX status %d\n", net->name, status);
 801                 /* FALL THROUGH */
 802         case 0:
 803                 break;
 804         }
 805
 806         net->trans_start = jiffies;
 807         netif_wake_queue(net);
 808 }
 809
 810 static void intr_callback(struct urb *urb)
 811 {
 812         pegasus_t *pegasus = urb->context;
 813         struct net_device *net;
 814         int res, status = urb->status;
 815
 816         if (!pegasus)
 817                 return;
 818         net = pegasus->net;
 819
 820         switch (status) {
 821         case 0:
 822                 break;
 823         case -ECONNRESET:       /* unlink */
 824         case -ENOENT:
 825         case -ESHUTDOWN:
 826                 return;
 827         default:
 828                 /* some Pegasus-I products report LOTS of data
 829                  * toggle errors... avoid log spamming
 830                  */
 831                 if (netif_msg_timer(pegasus))
 832                         pr_debug("%s: intr status %d\n", net->name,
 833                                         status);
 834         }
 835
 836         if (urb->actual_length >= 6) {
 837                 u8      * d = urb->transfer_buffer;
 838
 839                 /* byte 0 == tx_status1, reg 2B */
 840                 if (d[0] & (TX_UNDERRUN|EXCESSIVE_COL
 841                                         |LATE_COL|JABBER_TIMEOUT)) {
 842                         pegasus->stats.tx_errors++;
 843                         if (d[0] & TX_UNDERRUN)
 844                                 pegasus->stats.tx_fifo_errors++;
 845                         if (d[0] & (EXCESSIVE_COL | JABBER_TIMEOUT))
 846                                 pegasus->stats.tx_aborted_errors++;
 847                         if (d[0] & LATE_COL)
 848                                 pegasus->stats.tx_window_errors++;
 849                 }
 850
 851                 /* d[5].LINK_STATUS lies on some adapters.
 852                  * d[0].NO_CARRIER kicks in only with failed TX.
 853                  * ... so monitoring with MII may be safest.
 854                  */
 855
 856                 /* bytes 3-4 == rx_lostpkt, reg 2E/2F */
 857                 pegasus->stats.rx_missed_errors += ((d[3] & 0x7f) << 8) | d[4];
 858         }
 859
 860         res = usb_submit_urb(urb, GFP_ATOMIC);
 861         if (res == -ENODEV)
 862                 netif_device_detach(pegasus->net);
 863         if (res && netif_msg_timer(pegasus))
 864                 printk(KERN_ERR "%s: can't resubmit interrupt urb, %d\n",
 865                                 net->name, res);
 866 }
 867
 868 static void pegasus_tx_timeout(struct net_device *net)
 869 {
 870         pegasus_t *pegasus = netdev_priv(net);
 871         if (netif_msg_timer(pegasus))
 872                 printk(KERN_WARNING "%s: tx timeout\n", net->name);
 873         usb_unlink_urb(pegasus->tx_urb);
 874         pegasus->stats.tx_errors++;
 875 }
 876
 877 static int pegasus_start_xmit(struct sk_buff *skb, struct net_device *net)
 878 {
 879         pegasus_t *pegasus = netdev_priv(net);
 880         int count = ((skb->len + 2) & 0x3f) ? skb->len + 2 : skb->len + 3;
 881         int res;
 882         __u16 l16 = skb->len;
 883
 884         netif_stop_queue(net);
 885
 886         ((__le16 *) pegasus->tx_buff)[0] = cpu_to_le16(l16);
 887         skb_copy_from_linear_data(skb, pegasus->tx_buff + 2, skb->len);
 888         usb_fill_bulk_urb(pegasus->tx_urb, pegasus->usb,
 889                           usb_sndbulkpipe(pegasus->usb, 2),
 890                           pegasus->tx_buff, count,
 891                           write_bulk_callback, pegasus);
 892         if ((res = usb_submit_urb(pegasus->tx_urb, GFP_ATOMIC))) {
 893                 if (netif_msg_tx_err(pegasus))
 894                         printk(KERN_WARNING "%s: fail tx, %d\n",
 895                                         net->name, res);
 896                 switch (res) {
 897                 case -EPIPE:            /* stall, or disconnect from TT */
 898                         /* cleanup should already have been scheduled */
 899                         break;
 900                 case -ENODEV:           /* disconnect() upcoming */
 901                         netif_device_detach(pegasus->net);
 902                         break;
 903                 default:
 904                         pegasus->stats.tx_errors++;
 905                         netif_start_queue(net);
 906                 }
 907         } else {
 908                 pegasus->stats.tx_packets++;
 909                 pegasus->stats.tx_bytes += skb->len;
 910                 net->trans_start = jiffies;
 911         }
 912         dev_kfree_skb(skb);
 913
 914         return 0;
 915 }
 916
 917 static struct net_device_stats *pegasus_netdev_stats(struct net_device *dev)
 918 {
 919         return &((pegasus_t *) netdev_priv(dev))->stats;
 920 }
 921
 922 static inline void disable_net_traffic(pegasus_t * pegasus)
 923 {
 924         int tmp = 0;
 925
 926         set_registers(pegasus, EthCtrl0, 2, &tmp);
 927 }
 928
 929 static inline void get_interrupt_interval(pegasus_t * pegasus)
 930 {
 931         __u8 data[2];
 932
 933         read_eprom_word(pegasus, 4, (__u16 *) data);
 934         if (pegasus->usb->speed != USB_SPEED_HIGH) {
 935                 if (data[1] < 0x80) {
 936                         if (netif_msg_timer(pegasus))
 937                                 dev_info(&pegasus->intf->dev, "intr interval "
 938                                         "changed from %ums to %ums\n",
 939                                         data[1], 0x80);
 940                         data[1] = 0x80;
 941 #ifdef PEGASUS_WRITE_EEPROM
 942                         write_eprom_word(pegasus, 4, *(__u16 *) data);
 943 #endif
 944                 }
 945         }
 946         pegasus->intr_interval = data[1];
 947 }
 948
 949 static void set_carrier(struct net_device *net)
 950 {
 951         pegasus_t *pegasus = netdev_priv(net);
 952         u16 tmp;
 953
 954         if (read_mii_word(pegasus, pegasus->phy, MII_BMSR, &tmp))
 955                 return;
 956
 957         if (tmp & BMSR_LSTATUS)
 958                 netif_carrier_on(net);
 959         else
 960                 netif_carrier_off(net);
 961 }
 962
 963 static void free_all_urbs(pegasus_t * pegasus)
 964 {
 965         usb_free_urb(pegasus->intr_urb);
 966         usb_free_urb(pegasus->tx_urb);
 967         usb_free_urb(pegasus->rx_urb);
 968         usb_free_urb(pegasus->ctrl_urb);
 969 }
 970
 971 static void unlink_all_urbs(pegasus_t * pegasus)
 972 {
 973         usb_kill_urb(pegasus->intr_urb);
 974         usb_kill_urb(pegasus->tx_urb);
 975         usb_kill_urb(pegasus->rx_urb);
 976         usb_kill_urb(pegasus->ctrl_urb);
 977 }
 978
 979 static int alloc_urbs(pegasus_t * pegasus)
 980 {
 981         pegasus->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
 982         if (!pegasus->ctrl_urb) {
 983                 return 0;
 984         }
 985         pegasus->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 986         if (!pegasus->rx_urb) {
 987                 usb_free_urb(pegasus->ctrl_urb);
 988                 return 0;
 989         }
 990         pegasus->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 991         if (!pegasus->tx_urb) {
 992                 usb_free_urb(pegasus->rx_urb);
 993                 usb_free_urb(pegasus->ctrl_urb);
 994                 return 0;
 995         }
 996         pegasus->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
 997         if (!pegasus->intr_urb) {
 998                 usb_free_urb(pegasus->tx_urb);
 999                 usb_free_urb(pegasus->rx_urb);
1000                 usb_free_urb(pegasus->ctrl_urb);
1001                 return 0;
1002         }
1003
1004         return 1;
1005 }
1006
1007 static int pegasus_open(struct net_device *net)
1008 {
1009         pegasus_t *pegasus = netdev_priv(net);
1010         int res;
1011
1012         if (pegasus->rx_skb == NULL)
1013                 pegasus->rx_skb = pull_skb(pegasus);
1014         /*
1015          ** Note: no point to free the pool.  it is empty :-)
1016          */
1017         if (!pegasus->rx_skb)
1018                 return -ENOMEM;
1019
1020         res = set_registers(pegasus, EthID, 6, net->dev_addr);
1021
1022         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
1023                           usb_rcvbulkpipe(pegasus->usb, 1),
1024                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
1025                           read_bulk_callback, pegasus);
1026         if ((res = usb_submit_urb(pegasus->rx_urb, GFP_KERNEL))) {
1027                 if (res == -ENODEV)
1028                         netif_device_detach(pegasus->net);
1029                 if (netif_msg_ifup(pegasus))
1030                         pr_debug("%s: failed rx_urb, %d", net->name, res);
1031                 goto exit;
1032         }
1033
1034         usb_fill_int_urb(pegasus->intr_urb, pegasus->usb,
1035                          usb_rcvintpipe(pegasus->usb, 3),
1036                          pegasus->intr_buff, sizeof (pegasus->intr_buff),
1037                          intr_callback, pegasus, pegasus->intr_interval);
1038         if ((res = usb_submit_urb(pegasus->intr_urb, GFP_KERNEL))) {
1039                 if (res == -ENODEV)
1040                         netif_device_detach(pegasus->net);
1041                 if (netif_msg_ifup(pegasus))
1042                         pr_debug("%s: failed intr_urb, %d\n", net->name, res);
1043                 usb_kill_urb(pegasus->rx_urb);
1044                 goto exit;
1045         }
1046         if ((res = enable_net_traffic(net, pegasus->usb))) {
1047                 if (netif_msg_ifup(pegasus))
1048                         pr_debug("%s: can't enable_net_traffic() - %d\n",
1049                                         net->name, res);
1050                 res = -EIO;
1051                 usb_kill_urb(pegasus->rx_urb);
1052                 usb_kill_urb(pegasus->intr_urb);
1053                 free_skb_pool(pegasus);
1054                 goto exit;
1055         }
1056         set_carrier(net);
1057         netif_start_queue(net);
1058         if (netif_msg_ifup(pegasus))
1059                 pr_debug("%s: open\n", net->name);
1060         res = 0;
1061 exit:
1062         return res;
1063 }
1064
1065 static int pegasus_close(struct net_device *net)
1066 {
1067         pegasus_t *pegasus = netdev_priv(net);
1068
1069         netif_stop_queue(net);
1070         if (!(pegasus->flags & PEGASUS_UNPLUG))
1071                 disable_net_traffic(pegasus);
1072         tasklet_kill(&pegasus->rx_tl);
1073         unlink_all_urbs(pegasus);
1074
1075         return 0;
1076 }
1077
1078 static void pegasus_get_drvinfo(struct net_device *dev,
1079                                 struct ethtool_drvinfo *info)
1080 {
1081         pegasus_t *pegasus = netdev_priv(dev);
1082         strncpy(info->driver, driver_name, sizeof (info->driver) - 1);
1083         strncpy(info->version, DRIVER_VERSION, sizeof (info->version) - 1);
1084         usb_make_path(pegasus->usb, info->bus_info, sizeof (info->bus_info));
1085 }
1086
1087 /* also handles three patterns of some kind in hardware */
1088 #define WOL_SUPPORTED   (WAKE_MAGIC|WAKE_PHY)
1089
1090 static void
1091 pegasus_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1092 {
1093         pegasus_t       *pegasus = netdev_priv(dev);
1094
1095         wol->supported = WAKE_MAGIC | WAKE_PHY;
1096         wol->wolopts = pegasus->wolopts;
1097 }
1098
1099 static int
1100 pegasus_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1101 {
1102         pegasus_t       *pegasus = netdev_priv(dev);
1103         u8              reg78 = 0x04;
1104
1105         if (wol->wolopts & ~WOL_SUPPORTED)
1106                 return -EINVAL;
1107
1108         if (wol->wolopts & WAKE_MAGIC)
1109                 reg78 |= 0x80;
1110         if (wol->wolopts & WAKE_PHY)
1111                 reg78 |= 0x40;
1112         /* FIXME this 0x10 bit still needs to get set in the chip... */
1113         if (wol->wolopts)
1114                 pegasus->eth_regs[0] |= 0x10;
1115         else
1116                 pegasus->eth_regs[0] &= ~0x10;
1117         pegasus->wolopts = wol->wolopts;
1118         return set_register(pegasus, WakeupControl, reg78);
1119 }
1120
1121 static inline void pegasus_reset_wol(struct net_device *dev)
1122 {
1123         struct ethtool_wolinfo wol;
1124
1125         memset(&wol, 0, sizeof wol);
1126         (void) pegasus_set_wol(dev, &wol);
1127 }
1128
1129 static int
1130 pegasus_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1131 {
1132         pegasus_t *pegasus;
1133
1134         pegasus = netdev_priv(dev);
1135         mii_ethtool_gset(&pegasus->mii, ecmd);
1136         return 0;
1137 }
1138
1139 static int
1140 pegasus_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1141 {
1142         pegasus_t *pegasus = netdev_priv(dev);
1143         return mii_ethtool_sset(&pegasus->mii, ecmd);
1144 }
1145
1146 static int pegasus_nway_reset(struct net_device *dev)
1147 {
1148         pegasus_t *pegasus = netdev_priv(dev);
1149         return mii_nway_restart(&pegasus->mii);
1150 }
1151
1152 static u32 pegasus_get_link(struct net_device *dev)
1153 {
1154         pegasus_t *pegasus = netdev_priv(dev);
1155         return mii_link_ok(&pegasus->mii);
1156 }
1157
1158 static u32 pegasus_get_msglevel(struct net_device *dev)
1159 {
1160         pegasus_t *pegasus = netdev_priv(dev);
1161         return pegasus->msg_enable;
1162 }
1163
1164 static void pegasus_set_msglevel(struct net_device *dev, u32 v)
1165 {
1166         pegasus_t *pegasus = netdev_priv(dev);
1167         pegasus->msg_enable = v;
1168 }
1169
1170 static struct ethtool_ops ops = {
1171         .get_drvinfo = pegasus_get_drvinfo,
1172         .get_settings = pegasus_get_settings,
1173         .set_settings = pegasus_set_settings,
1174         .nway_reset = pegasus_nway_reset,
1175         .get_link = pegasus_get_link,
1176         .get_msglevel = pegasus_get_msglevel,
1177         .set_msglevel = pegasus_set_msglevel,
1178         .get_wol = pegasus_get_wol,
1179         .set_wol = pegasus_set_wol,
1180 };
1181
1182 static int pegasus_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
1183 {
1184         __u16 *data = (__u16 *) & rq->ifr_ifru;
1185         pegasus_t *pegasus = netdev_priv(net);
1186         int res;
1187
1188         switch (cmd) {
1189         case SIOCDEVPRIVATE:
1190                 data[0] = pegasus->phy;
1191         case SIOCDEVPRIVATE + 1:
1192                 read_mii_word(pegasus, data[0], data[1] & 0x1f, &data[3]);
1193                 res = 0;
1194                 break;
1195         case SIOCDEVPRIVATE + 2:
1196                 if (!capable(CAP_NET_ADMIN))
1197                         return -EPERM;
1198                 write_mii_word(pegasus, pegasus->phy, data[1] & 0x1f, data[2]);
1199                 res = 0;
1200                 break;
1201         default:
1202                 res = -EOPNOTSUPP;
1203         }
1204         return res;
1205 }
1206
1207 static void pegasus_set_multicast(struct net_device *net)
1208 {
1209         pegasus_t *pegasus = netdev_priv(net);
1210
1211         if (net->flags & IFF_PROMISC) {
1212                 pegasus->eth_regs[EthCtrl2] |= RX_PROMISCUOUS;
1213                 if (netif_msg_link(pegasus))
1214                         pr_info("%s: Promiscuous mode enabled.\n", net->name);
1215         } else if (net->mc_count || (net->flags & IFF_ALLMULTI)) {
1216                 pegasus->eth_regs[EthCtrl0] |= RX_MULTICAST;
1217                 pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1218                 if (netif_msg_link(pegasus))
1219                         pr_debug("%s: set allmulti\n", net->name);
1220         } else {
1221                 pegasus->eth_regs[EthCtrl0] &= ~RX_MULTICAST;
1222                 pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1223         }
1224
1225         pegasus->ctrl_urb->status = 0;
1226
1227         pegasus->flags |= ETH_REGS_CHANGE;
1228         ctrl_callback(pegasus->ctrl_urb);
1229 }
1230
1231 static __u8 mii_phy_probe(pegasus_t * pegasus)
1232 {
1233         int i;
1234         __u16 tmp;
1235
1236         for (i = 0; i < 32; i++) {
1237                 read_mii_word(pegasus, i, MII_BMSR, &tmp);
1238                 if (tmp == 0 || tmp == 0xffff || (tmp & BMSR_MEDIA) == 0)
1239                         continue;
1240                 else
1241                         return i;
1242         }
1243
1244         return 0xff;
1245 }
1246
1247 static inline void setup_pegasus_II(pegasus_t * pegasus)
1248 {
1249         __u8 data = 0xa5;
1250
1251         set_register(pegasus, Reg1d, 0);
1252         set_register(pegasus, Reg7b, 1);
1253         mdelay(100);
1254         if ((pegasus->features & HAS_HOME_PNA) && mii_mode)
1255                 set_register(pegasus, Reg7b, 0);
1256         else
1257                 set_register(pegasus, Reg7b, 2);
1258
1259         set_register(pegasus, 0x83, data);
1260         get_registers(pegasus, 0x83, 1, &data);
1261
1262         if (data == 0xa5) {
1263                 pegasus->chip = 0x8513;
1264         } else {
1265                 pegasus->chip = 0;
1266         }
1267
1268         set_register(pegasus, 0x80, 0xc0);
1269         set_register(pegasus, 0x83, 0xff);
1270         set_register(pegasus, 0x84, 0x01);
1271
1272         if (pegasus->features & HAS_HOME_PNA && mii_mode)
1273                 set_register(pegasus, Reg81, 6);
1274         else
1275                 set_register(pegasus, Reg81, 2);
1276 }
1277
1278
1279 static int pegasus_count;
1280 static struct workqueue_struct *pegasus_workqueue = NULL;
1281 #define CARRIER_CHECK_DELAY (2 * HZ)
1282
1283 static void check_carrier(struct work_struct *work)
1284 {
1285         pegasus_t *pegasus = container_of(work, pegasus_t, carrier_check.work);
1286         set_carrier(pegasus->net);
1287         if (!(pegasus->flags & PEGASUS_UNPLUG)) {
1288                 queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1289                         CARRIER_CHECK_DELAY);
1290         }
1291 }
1292
1293 static int pegasus_blacklisted(struct usb_device *udev)
1294 {
1295         struct usb_device_descriptor *udd = &udev->descriptor;
1296
1297         /* Special quirk to keep the driver from handling the Belkin Bluetooth
1298          * dongle which happens to have the same ID.
1299          */
1300         if ((udd->idVendor == VENDOR_BELKIN && udd->idProduct == 0x0121) &&
1301             (udd->bDeviceClass == USB_CLASS_WIRELESS_CONTROLLER) &&
1302             (udd->bDeviceProtocol == 1))
1303                 return 1;
1304
1305         return 0;
1306 }
1307
1308 /* we rely on probe() and remove() being serialized so we
1309  * don't need extra locking on pegasus_count.
1310  */
1311 static void pegasus_dec_workqueue(void)
1312 {
1313         pegasus_count--;
1314         if (pegasus_count == 0) {
1315                 destroy_workqueue(pegasus_workqueue);
1316                 pegasus_workqueue = NULL;
1317         }
1318 }
1319
1320 static int pegasus_probe(struct usb_interface *intf,
1321                          const struct usb_device_id *id)
1322 {
1323         struct usb_device *dev = interface_to_usbdev(intf);
1324         struct net_device *net;
1325         pegasus_t *pegasus;
1326         int dev_index = id - pegasus_ids;
1327         int res = -ENOMEM;
1328
1329         if (pegasus_blacklisted(dev))
1330                 return -ENODEV;
1331
1332         if (pegasus_count == 0) {
1333                 pegasus_workqueue = create_singlethread_workqueue("pegasus");
1334                 if (!pegasus_workqueue)
1335                         return -ENOMEM;
1336         }
1337         pegasus_count++;
1338
1339         usb_get_dev(dev);
1340
1341         net = alloc_etherdev(sizeof(struct pegasus));
1342         if (!net) {
1343                 dev_err(&intf->dev, "can't allocate %s\n", "device");
1344                 goto out;
1345         }
1346
1347         pegasus = netdev_priv(net);
1348         pegasus->dev_index = dev_index;
1349         init_waitqueue_head(&pegasus->ctrl_wait);
1350
1351         if (!alloc_urbs(pegasus)) {
1352                 dev_err(&intf->dev, "can't allocate %s\n", "urbs");
1353                 goto out1;
1354         }
1355
1356         tasklet_init(&pegasus->rx_tl, rx_fixup, (unsigned long) pegasus);
1357
1358         INIT_DELAYED_WORK(&pegasus->carrier_check, check_carrier);
1359
1360         pegasus->intf = intf;
1361         pegasus->usb = dev;
1362         pegasus->net = net;
1363         net->open = pegasus_open;
1364         net->stop = pegasus_close;
1365         net->watchdog_timeo = PEGASUS_TX_TIMEOUT;
1366         net->tx_timeout = pegasus_tx_timeout;
1367         net->do_ioctl = pegasus_ioctl;
1368         net->hard_start_xmit = pegasus_start_xmit;
1369         net->set_multicast_list = pegasus_set_multicast;
1370         net->get_stats = pegasus_netdev_stats;
1371         SET_ETHTOOL_OPS(net, &ops);
1372         pegasus->mii.dev = net;
1373         pegasus->mii.mdio_read = mdio_read;
1374         pegasus->mii.mdio_write = mdio_write;
1375         pegasus->mii.phy_id_mask = 0x1f;
1376         pegasus->mii.reg_num_mask = 0x1f;
1377         spin_lock_init(&pegasus->rx_pool_lock);
1378         pegasus->msg_enable = netif_msg_init (msg_level, NETIF_MSG_DRV
1379                                 | NETIF_MSG_PROBE | NETIF_MSG_LINK);
1380
1381         pegasus->features = usb_dev_id[dev_index].private;
1382         get_interrupt_interval(pegasus);
1383         if (reset_mac(pegasus)) {
1384                 dev_err(&intf->dev, "can't reset MAC\n");
1385                 res = -EIO;
1386                 goto out2;
1387         }
1388         set_ethernet_addr(pegasus);
1389         fill_skb_pool(pegasus);
1390         if (pegasus->features & PEGASUS_II) {
1391                 dev_info(&intf->dev, "setup Pegasus II specific registers\n");
1392                 setup_pegasus_II(pegasus);
1393         }
1394         pegasus->phy = mii_phy_probe(pegasus);
1395         if (pegasus->phy == 0xff) {
1396                 dev_warn(&intf->dev, "can't locate MII phy, using default\n");
1397                 pegasus->phy = 1;
1398         }
1399         pegasus->mii.phy_id = pegasus->phy;
1400         usb_set_intfdata(intf, pegasus);
1401         SET_NETDEV_DEV(net, &intf->dev);
1402         pegasus_reset_wol(net);
1403         res = register_netdev(net);
1404         if (res)
1405                 goto out3;
1406         queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1407                                 CARRIER_CHECK_DELAY);
1408
1409         dev_info(&intf->dev, "%s, %s, %pM\n",
1410                  net->name,
1411                  usb_dev_id[dev_index].name,
1412                  net->dev_addr);
1413         return 0;
1414
1415 out3:
1416         usb_set_intfdata(intf, NULL);
1417         free_skb_pool(pegasus);
1418 out2:
1419         free_all_urbs(pegasus);
1420 out1:
1421         free_netdev(net);
1422 out:
1423         usb_put_dev(dev);
1424         pegasus_dec_workqueue();
1425         return res;
1426 }
1427
1428 static void pegasus_disconnect(struct usb_interface *intf)
1429 {
1430         struct pegasus *pegasus = usb_get_intfdata(intf);
1431
1432         usb_set_intfdata(intf, NULL);
1433         if (!pegasus) {
1434                 dev_dbg(&intf->dev, "unregistering non-bound device?\n");
1435                 return;
1436         }
1437
1438         pegasus->flags |= PEGASUS_UNPLUG;
1439         cancel_delayed_work(&pegasus->carrier_check);
1440         unregister_netdev(pegasus->net);
1441         usb_put_dev(interface_to_usbdev(intf));
1442         unlink_all_urbs(pegasus);
1443         free_all_urbs(pegasus);
1444         free_skb_pool(pegasus);
1445         if (pegasus->rx_skb != NULL) {
1446                 dev_kfree_skb(pegasus->rx_skb);
1447                 pegasus->rx_skb = NULL;
1448         }
1449         free_netdev(pegasus->net);
1450         pegasus_dec_workqueue();
1451 }
1452
1453 static int pegasus_suspend (struct usb_interface *intf, pm_message_t message)
1454 {
1455         struct pegasus *pegasus = usb_get_intfdata(intf);
1456
1457         netif_device_detach (pegasus->net);
1458         cancel_delayed_work(&pegasus->carrier_check);
1459         if (netif_running(pegasus->net)) {
1460                 usb_kill_urb(pegasus->rx_urb);
1461                 usb_kill_urb(pegasus->intr_urb);
1462         }
1463         return 0;
1464 }
1465
1466 static int pegasus_resume (struct usb_interface *intf)
1467 {
1468         struct pegasus *pegasus = usb_get_intfdata(intf);
1469
1470         netif_device_attach (pegasus->net);
1471         if (netif_running(pegasus->net)) {
1472                 pegasus->rx_urb->status = 0;
1473                 pegasus->rx_urb->actual_length = 0;
1474                 read_bulk_callback(pegasus->rx_urb);
1475
1476                 pegasus->intr_urb->status = 0;
1477                 pegasus->intr_urb->actual_length = 0;
1478                 intr_callback(pegasus->intr_urb);
1479         }
1480         queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1481                                 CARRIER_CHECK_DELAY);
1482         return 0;
1483 }
1484
1485 static struct usb_driver pegasus_driver = {
1486         .name = driver_name,
1487         .probe = pegasus_probe,
1488         .disconnect = pegasus_disconnect,
1489         .id_table = pegasus_ids,
1490         .suspend = pegasus_suspend,
1491         .resume = pegasus_resume,
1492 };
1493
1494 static void __init parse_id(char *id)
1495 {
1496         unsigned int vendor_id=0, device_id=0, flags=0, i=0;
1497         char *token, *name=NULL;
1498
1499         if ((token = strsep(&id, ":")) != NULL)
1500                 name = token;
1501         /* name now points to a null terminated string*/
1502         if ((token = strsep(&id, ":")) != NULL)
1503                 vendor_id = simple_strtoul(token, NULL, 16);
1504         if ((token = strsep(&id, ":")) != NULL)
1505                 device_id = simple_strtoul(token, NULL, 16);
1506         flags = simple_strtoul(id, NULL, 16);
1507         pr_info("%s: new device %s, vendor ID 0x%04x, device ID 0x%04x, flags: 0x%x\n",
1508                 driver_name, name, vendor_id, device_id, flags);
1509
1510         if (vendor_id > 0x10000 || vendor_id == 0)
1511                 return;
1512         if (device_id > 0x10000 || device_id == 0)
1513                 return;
1514
1515         for (i=0; usb_dev_id[i].name; i++);
1516         usb_dev_id[i].name = name;
1517         usb_dev_id[i].vendor = vendor_id;
1518         usb_dev_id[i].device = device_id;
1519         usb_dev_id[i].private = flags;
1520         pegasus_ids[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
1521         pegasus_ids[i].idVendor = vendor_id;
1522         pegasus_ids[i].idProduct = device_id;
1523 }
1524
1525 static int __init pegasus_init(void)
1526 {
1527         pr_info("%s: %s, " DRIVER_DESC "\n", driver_name, DRIVER_VERSION);
1528         if (devid)
1529                 parse_id(devid);
1530         return usb_register(&pegasus_driver);
1531 }
1532
1533 static void __exit pegasus_exit(void)
1534 {
1535         usb_deregister(&pegasus_driver);
1536 }
1537
1538 module_init(pegasus_init);
1539 module_exit(pegasus_exit);