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 static const struct net_device_ops pegasus_netdev_ops;
  97
  98 static int update_eth_regs_async(pegasus_t *);
  99 /* Aargh!!! I _really_ hate such tweaks */
 100 static void ctrl_callback(struct urb *urb)
 101 {
 102         pegasus_t *pegasus = urb->context;
 103         int status = urb->status;
 104
 105         if (!pegasus)
 106                 return;
 107
 108         switch (status) {
 109         case 0:
 110                 if (pegasus->flags & ETH_REGS_CHANGE) {
 111                         pegasus->flags &= ~ETH_REGS_CHANGE;
 112                         pegasus->flags |= ETH_REGS_CHANGED;
 113                         update_eth_regs_async(pegasus);
 114                         return;
 115                 }
 116                 break;
 117         case -EINPROGRESS:
 118                 return;
 119         case -ENOENT:
 120                 break;
 121         default:
 122                 if (netif_msg_drv(pegasus) && printk_ratelimit())
 123                         dev_dbg(&pegasus->intf->dev, "%s, status %d\n",
 124                                 __func__, status);
 125         }
 126         pegasus->flags &= ~ETH_REGS_CHANGED;
 127         wake_up(&pegasus->ctrl_wait);
 128 }
 129
 130 static int get_registers(pegasus_t * pegasus, __u16 indx, __u16 size,
 131                          void *data)
 132 {
 133         int ret;
 134         char *buffer;
 135         DECLARE_WAITQUEUE(wait, current);
 136
 137         buffer = kmalloc(size, GFP_KERNEL);
 138         if (!buffer) {
 139                 if (netif_msg_drv(pegasus))
 140                         dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
 141                                         __func__);
 142                 return -ENOMEM;
 143         }
 144         add_wait_queue(&pegasus->ctrl_wait, &wait);
 145         set_current_state(TASK_UNINTERRUPTIBLE);
 146         while (pegasus->flags & ETH_REGS_CHANGED)
 147                 schedule();
 148         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 149         set_current_state(TASK_RUNNING);
 150
 151         pegasus->dr.bRequestType = PEGASUS_REQT_READ;
 152         pegasus->dr.bRequest = PEGASUS_REQ_GET_REGS;
 153         pegasus->dr.wValue = cpu_to_le16(0);
 154         pegasus->dr.wIndex = cpu_to_le16(indx);
 155         pegasus->dr.wLength = cpu_to_le16(size);
 156         pegasus->ctrl_urb->transfer_buffer_length = size;
 157
 158         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 159                              usb_rcvctrlpipe(pegasus->usb, 0),
 160                              (char *) &pegasus->dr,
 161                              buffer, size, ctrl_callback, pegasus);
 162
 163         add_wait_queue(&pegasus->ctrl_wait, &wait);
 164         set_current_state(TASK_UNINTERRUPTIBLE);
 165
 166         /* using ATOMIC, we'd never wake up if we slept */
 167         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 168                 set_current_state(TASK_RUNNING);
 169                 if (ret == -ENODEV)
 170                         netif_device_detach(pegasus->net);
 171                 if (netif_msg_drv(pegasus) && printk_ratelimit())
 172                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 173                                         __func__, ret);
 174                 goto out;
 175         }
 176
 177         schedule();
 178 out:
 179         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 180         memcpy(data, buffer, size);
 181         kfree(buffer);
 182
 183         return ret;
 184 }
 185
 186 static int set_registers(pegasus_t * pegasus, __u16 indx, __u16 size,
 187                          void *data)
 188 {
 189         int ret;
 190         char *buffer;
 191         DECLARE_WAITQUEUE(wait, current);
 192
 193         buffer = kmalloc(size, GFP_KERNEL);
 194         if (!buffer) {
 195                 if (netif_msg_drv(pegasus))
 196                         dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
 197                                         __func__);
 198                 return -ENOMEM;
 199         }
 200         memcpy(buffer, data, size);
 201
 202         add_wait_queue(&pegasus->ctrl_wait, &wait);
 203         set_current_state(TASK_UNINTERRUPTIBLE);
 204         while (pegasus->flags & ETH_REGS_CHANGED)
 205                 schedule();
 206         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 207         set_current_state(TASK_RUNNING);
 208
 209         pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
 210         pegasus->dr.bRequest = PEGASUS_REQ_SET_REGS;
 211         pegasus->dr.wValue = cpu_to_le16(0);
 212         pegasus->dr.wIndex = cpu_to_le16(indx);
 213         pegasus->dr.wLength = cpu_to_le16(size);
 214         pegasus->ctrl_urb->transfer_buffer_length = size;
 215
 216         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 217                              usb_sndctrlpipe(pegasus->usb, 0),
 218                              (char *) &pegasus->dr,
 219                              buffer, size, ctrl_callback, pegasus);
 220
 221         add_wait_queue(&pegasus->ctrl_wait, &wait);
 222         set_current_state(TASK_UNINTERRUPTIBLE);
 223
 224         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 225                 if (ret == -ENODEV)
 226                         netif_device_detach(pegasus->net);
 227                 if (netif_msg_drv(pegasus))
 228                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 229                                         __func__, ret);
 230                 goto out;
 231         }
 232
 233         schedule();
 234 out:
 235         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 236         kfree(buffer);
 237
 238         return ret;
 239 }
 240
 241 static int set_register(pegasus_t * pegasus, __u16 indx, __u8 data)
 242 {
 243         int ret;
 244         char *tmp;
 245         DECLARE_WAITQUEUE(wait, current);
 246
 247         tmp = kmalloc(1, GFP_KERNEL);
 248         if (!tmp) {
 249                 if (netif_msg_drv(pegasus))
 250                         dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
 251                                         __func__);
 252                 return -ENOMEM;
 253         }
 254         memcpy(tmp, &data, 1);
 255         add_wait_queue(&pegasus->ctrl_wait, &wait);
 256         set_current_state(TASK_UNINTERRUPTIBLE);
 257         while (pegasus->flags & ETH_REGS_CHANGED)
 258                 schedule();
 259         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 260         set_current_state(TASK_RUNNING);
 261
 262         pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
 263         pegasus->dr.bRequest = PEGASUS_REQ_SET_REG;
 264         pegasus->dr.wValue = cpu_to_le16(data);
 265         pegasus->dr.wIndex = cpu_to_le16(indx);
 266         pegasus->dr.wLength = cpu_to_le16(1);
 267         pegasus->ctrl_urb->transfer_buffer_length = 1;
 268
 269         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 270                              usb_sndctrlpipe(pegasus->usb, 0),
 271                              (char *) &pegasus->dr,
 272                              tmp, 1, ctrl_callback, pegasus);
 273
 274         add_wait_queue(&pegasus->ctrl_wait, &wait);
 275         set_current_state(TASK_UNINTERRUPTIBLE);
 276
 277         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 278                 if (ret == -ENODEV)
 279                         netif_device_detach(pegasus->net);
 280                 if (netif_msg_drv(pegasus) && printk_ratelimit())
 281                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 282                                         __func__, ret);
 283                 goto out;
 284         }
 285
 286         schedule();
 287 out:
 288         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 289         kfree(tmp);
 290
 291         return ret;
 292 }
 293
 294 static int update_eth_regs_async(pegasus_t * pegasus)
 295 {
 296         int ret;
 297
 298         pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
 299         pegasus->dr.bRequest = PEGASUS_REQ_SET_REGS;
 300         pegasus->dr.wValue = 0;
 301         pegasus->dr.wIndex = cpu_to_le16(EthCtrl0);
 302         pegasus->dr.wLength = cpu_to_le16(3);
 303         pegasus->ctrl_urb->transfer_buffer_length = 3;
 304
 305         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 306                              usb_sndctrlpipe(pegasus->usb, 0),
 307                              (char *) &pegasus->dr,
 308                              pegasus->eth_regs, 3, ctrl_callback, pegasus);
 309
 310         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 311                 if (ret == -ENODEV)
 312                         netif_device_detach(pegasus->net);
 313                 if (netif_msg_drv(pegasus))
 314                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 315                                         __func__, ret);
 316         }
 317
 318         return ret;
 319 }
 320
 321 /* Returns 0 on success, error on failure */
 322 static int read_mii_word(pegasus_t * pegasus, __u8 phy, __u8 indx, __u16 * regd)
 323 {
 324         int i;
 325         __u8 data[4] = { phy, 0, 0, indx };
 326         __le16 regdi;
 327         int ret;
 328
 329         set_register(pegasus, PhyCtrl, 0);
 330         set_registers(pegasus, PhyAddr, sizeof (data), data);
 331         set_register(pegasus, PhyCtrl, (indx | PHY_READ));
 332         for (i = 0; i < REG_TIMEOUT; i++) {
 333                 ret = get_registers(pegasus, PhyCtrl, 1, data);
 334                 if (ret == -ESHUTDOWN)
 335                         goto fail;
 336                 if (data[0] & PHY_DONE)
 337                         break;
 338         }
 339         if (i < REG_TIMEOUT) {
 340                 ret = get_registers(pegasus, PhyData, 2, &regdi);
 341                 *regd = le16_to_cpu(regdi);
 342                 return ret;
 343         }
 344 fail:
 345         if (netif_msg_drv(pegasus))
 346                 dev_warn(&pegasus->intf->dev, "%s failed\n", __func__);
 347
 348         return ret;
 349 }
 350
 351 static int mdio_read(struct net_device *dev, int phy_id, int loc)
 352 {
 353         pegasus_t *pegasus = (pegasus_t *) netdev_priv(dev);
 354         u16 res;
 355
 356         read_mii_word(pegasus, phy_id, loc, &res);
 357         return (int)res;
 358 }
 359
 360 static int write_mii_word(pegasus_t * pegasus, __u8 phy, __u8 indx, __u16 regd)
 361 {
 362         int i;
 363         __u8 data[4] = { phy, 0, 0, indx };
 364         int ret;
 365
 366         data[1] = (u8) regd;
 367         data[2] = (u8) (regd >> 8);
 368         set_register(pegasus, PhyCtrl, 0);
 369         set_registers(pegasus, PhyAddr, sizeof(data), data);
 370         set_register(pegasus, PhyCtrl, (indx | PHY_WRITE));
 371         for (i = 0; i < REG_TIMEOUT; i++) {
 372                 ret = get_registers(pegasus, PhyCtrl, 1, data);
 373                 if (ret == -ESHUTDOWN)
 374                         goto fail;
 375                 if (data[0] & PHY_DONE)
 376                         break;
 377         }
 378         if (i < REG_TIMEOUT)
 379                 return ret;
 380
 381 fail:
 382         if (netif_msg_drv(pegasus))
 383                 dev_warn(&pegasus->intf->dev, "%s failed\n", __func__);
 384         return -ETIMEDOUT;
 385 }
 386
 387 static void mdio_write(struct net_device *dev, int phy_id, int loc, int val)
 388 {
 389         pegasus_t *pegasus = (pegasus_t *) netdev_priv(dev);
 390
 391         write_mii_word(pegasus, phy_id, loc, val);
 392 }
 393
 394 static int read_eprom_word(pegasus_t * pegasus, __u8 index, __u16 * retdata)
 395 {
 396         int i;
 397         __u8 tmp;
 398         __le16 retdatai;
 399         int ret;
 400
 401         set_register(pegasus, EpromCtrl, 0);
 402         set_register(pegasus, EpromOffset, index);
 403         set_register(pegasus, EpromCtrl, EPROM_READ);
 404
 405         for (i = 0; i < REG_TIMEOUT; i++) {
 406                 ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
 407                 if (tmp & EPROM_DONE)
 408                         break;
 409                 if (ret == -ESHUTDOWN)
 410                         goto fail;
 411         }
 412         if (i < REG_TIMEOUT) {
 413                 ret = get_registers(pegasus, EpromData, 2, &retdatai);
 414                 *retdata = le16_to_cpu(retdatai);
 415                 return ret;
 416         }
 417
 418 fail:
 419         if (netif_msg_drv(pegasus))
 420                 dev_warn(&pegasus->intf->dev, "%s failed\n", __func__);
 421         return -ETIMEDOUT;
 422 }
 423
 424 #ifdef  PEGASUS_WRITE_EEPROM
 425 static inline void enable_eprom_write(pegasus_t * pegasus)
 426 {
 427         __u8 tmp;
 428         int ret;
 429
 430         get_registers(pegasus, EthCtrl2, 1, &tmp);
 431         set_register(pegasus, EthCtrl2, tmp | EPROM_WR_ENABLE);
 432 }
 433
 434 static inline void disable_eprom_write(pegasus_t * pegasus)
 435 {
 436         __u8 tmp;
 437         int ret;
 438
 439         get_registers(pegasus, EthCtrl2, 1, &tmp);
 440         set_register(pegasus, EpromCtrl, 0);
 441         set_register(pegasus, EthCtrl2, tmp & ~EPROM_WR_ENABLE);
 442 }
 443
 444 static int write_eprom_word(pegasus_t * pegasus, __u8 index, __u16 data)
 445 {
 446         int i;
 447         __u8 tmp, d[4] = { 0x3f, 0, 0, EPROM_WRITE };
 448         int ret;
 449
 450         set_registers(pegasus, EpromOffset, 4, d);
 451         enable_eprom_write(pegasus);
 452         set_register(pegasus, EpromOffset, index);
 453         set_registers(pegasus, EpromData, 2, &data);
 454         set_register(pegasus, EpromCtrl, EPROM_WRITE);
 455
 456         for (i = 0; i < REG_TIMEOUT; i++) {
 457                 ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
 458                 if (ret == -ESHUTDOWN)
 459                         goto fail;
 460                 if (tmp & EPROM_DONE)
 461                         break;
 462         }
 463         disable_eprom_write(pegasus);
 464         if (i < REG_TIMEOUT)
 465                 return ret;
 466 fail:
 467         if (netif_msg_drv(pegasus))
 468                 dev_warn(&pegasus->intf->dev, "%s failed\n", __func__);
 469         return -ETIMEDOUT;
 470 }
 471 #endif                          /* PEGASUS_WRITE_EEPROM */
 472
 473 static inline void get_node_id(pegasus_t * pegasus, __u8 * id)
 474 {
 475         int i;
 476         __u16 w16;
 477
 478         for (i = 0; i < 3; i++) {
 479                 read_eprom_word(pegasus, i, &w16);
 480                 ((__le16 *) id)[i] = cpu_to_le16(w16);
 481         }
 482 }
 483
 484 static void set_ethernet_addr(pegasus_t * pegasus)
 485 {
 486         __u8 node_id[6];
 487
 488         if (pegasus->features & PEGASUS_II) {
 489                 get_registers(pegasus, 0x10, sizeof(node_id), node_id);
 490         } else {
 491                 get_node_id(pegasus, node_id);
 492                 set_registers(pegasus, EthID, sizeof (node_id), node_id);
 493         }
 494         memcpy(pegasus->net->dev_addr, node_id, sizeof (node_id));
 495 }
 496
 497 static inline int reset_mac(pegasus_t * pegasus)
 498 {
 499         __u8 data = 0x8;
 500         int i;
 501
 502         set_register(pegasus, EthCtrl1, data);
 503         for (i = 0; i < REG_TIMEOUT; i++) {
 504                 get_registers(pegasus, EthCtrl1, 1, &data);
 505                 if (~data & 0x08) {
 506                         if (loopback & 1)
 507                                 break;
 508                         if (mii_mode && (pegasus->features & HAS_HOME_PNA))
 509                                 set_register(pegasus, Gpio1, 0x34);
 510                         else
 511                                 set_register(pegasus, Gpio1, 0x26);
 512                         set_register(pegasus, Gpio0, pegasus->features);
 513                         set_register(pegasus, Gpio0, DEFAULT_GPIO_SET);
 514                         break;
 515                 }
 516         }
 517         if (i == REG_TIMEOUT)
 518                 return -ETIMEDOUT;
 519
 520         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
 521             usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
 522                 set_register(pegasus, Gpio0, 0x24);
 523                 set_register(pegasus, Gpio0, 0x26);
 524         }
 525         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_ELCON) {
 526                 __u16 auxmode;
 527                 read_mii_word(pegasus, 3, 0x1b, &auxmode);
 528                 write_mii_word(pegasus, 3, 0x1b, auxmode | 4);
 529         }
 530
 531         return 0;
 532 }
 533
 534 static int enable_net_traffic(struct net_device *dev, struct usb_device *usb)
 535 {
 536         __u16 linkpart;
 537         __u8 data[4];
 538         pegasus_t *pegasus = netdev_priv(dev);
 539         int ret;
 540
 541         read_mii_word(pegasus, pegasus->phy, MII_LPA, &linkpart);
 542         data[0] = 0xc9;
 543         data[1] = 0;
 544         if (linkpart & (ADVERTISE_100FULL | ADVERTISE_10FULL))
 545                 data[1] |= 0x20;        /* set full duplex */
 546         if (linkpart & (ADVERTISE_100FULL | ADVERTISE_100HALF))
 547                 data[1] |= 0x10;        /* set 100 Mbps */
 548         if (mii_mode)
 549                 data[1] = 0;
 550         data[2] = (loopback & 1) ? 0x09 : 0x01;
 551
 552         memcpy(pegasus->eth_regs, data, sizeof (data));
 553         ret = set_registers(pegasus, EthCtrl0, 3, data);
 554
 555         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
 556             usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS2 ||
 557             usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
 558                 u16 auxmode;
 559                 read_mii_word(pegasus, 0, 0x1b, &auxmode);
 560                 write_mii_word(pegasus, 0, 0x1b, auxmode | 4);
 561         }
 562
 563         return ret;
 564 }
 565
 566 static void fill_skb_pool(pegasus_t * pegasus)
 567 {
 568         int i;
 569
 570         for (i = 0; i < RX_SKBS; i++) {
 571                 if (pegasus->rx_pool[i])
 572                         continue;
 573                 pegasus->rx_pool[i] = dev_alloc_skb(PEGASUS_MTU + 2);
 574                 /*
 575                  ** we give up if the allocation fail. the tasklet will be
 576                  ** rescheduled again anyway...
 577                  */
 578                 if (pegasus->rx_pool[i] == NULL)
 579                         return;
 580                 skb_reserve(pegasus->rx_pool[i], 2);
 581         }
 582 }
 583
 584 static void free_skb_pool(pegasus_t * pegasus)
 585 {
 586         int i;
 587
 588         for (i = 0; i < RX_SKBS; i++) {
 589                 if (pegasus->rx_pool[i]) {
 590                         dev_kfree_skb(pegasus->rx_pool[i]);
 591                         pegasus->rx_pool[i] = NULL;
 592                 }
 593         }
 594 }
 595
 596 static inline struct sk_buff *pull_skb(pegasus_t * pegasus)
 597 {
 598         int i;
 599         struct sk_buff *skb;
 600
 601         for (i = 0; i < RX_SKBS; i++) {
 602                 if (likely(pegasus->rx_pool[i] != NULL)) {
 603                         skb = pegasus->rx_pool[i];
 604                         pegasus->rx_pool[i] = NULL;
 605                         return skb;
 606                 }
 607         }
 608         return NULL;
 609 }
 610
 611 static void read_bulk_callback(struct urb *urb)
 612 {
 613         pegasus_t *pegasus = urb->context;
 614         struct net_device *net;
 615         int rx_status, count = urb->actual_length;
 616         int status = urb->status;
 617         u8 *buf = urb->transfer_buffer;
 618         __u16 pkt_len;
 619
 620         if (!pegasus)
 621                 return;
 622
 623         net = pegasus->net;
 624         if (!netif_device_present(net) || !netif_running(net))
 625                 return;
 626
 627         switch (status) {
 628         case 0:
 629                 break;
 630         case -ETIME:
 631                 if (netif_msg_rx_err(pegasus))
 632                         pr_debug("%s: reset MAC\n", net->name);
 633                 pegasus->flags &= ~PEGASUS_RX_BUSY;
 634                 break;
 635         case -EPIPE:            /* stall, or disconnect from TT */
 636                 /* FIXME schedule work to clear the halt */
 637                 if (netif_msg_rx_err(pegasus))
 638                         printk(KERN_WARNING "%s: no rx stall recovery\n",
 639                                         net->name);
 640                 return;
 641         case -ENOENT:
 642         case -ECONNRESET:
 643         case -ESHUTDOWN:
 644                 if (netif_msg_ifdown(pegasus))
 645                         pr_debug("%s: rx unlink, %d\n", net->name, status);
 646                 return;
 647         default:
 648                 if (netif_msg_rx_err(pegasus))
 649                         pr_debug("%s: RX status %d\n", net->name, status);
 650                 goto goon;
 651         }
 652
 653         if (!count || count < 4)
 654                 goto goon;
 655
 656         rx_status = buf[count - 2];
 657         if (rx_status & 0x1e) {
 658                 if (netif_msg_rx_err(pegasus))
 659                         pr_debug("%s: RX packet error %x\n",
 660                                         net->name, rx_status);
 661                 pegasus->stats.rx_errors++;
 662                 if (rx_status & 0x06)   // long or runt
 663                         pegasus->stats.rx_length_errors++;
 664                 if (rx_status & 0x08)
 665                         pegasus->stats.rx_crc_errors++;
 666                 if (rx_status & 0x10)   // extra bits
 667                         pegasus->stats.rx_frame_errors++;
 668                 goto goon;
 669         }
 670         if (pegasus->chip == 0x8513) {
 671                 pkt_len = le32_to_cpu(*(__le32 *)urb->transfer_buffer);
 672                 pkt_len &= 0x0fff;
 673                 pegasus->rx_skb->data += 2;
 674         } else {
 675                 pkt_len = buf[count - 3] << 8;
 676                 pkt_len += buf[count - 4];
 677                 pkt_len &= 0xfff;
 678                 pkt_len -= 8;
 679         }
 680
 681         /*
 682          * If the packet is unreasonably long, quietly drop it rather than
 683          * kernel panicing by calling skb_put.
 684          */
 685         if (pkt_len > PEGASUS_MTU)
 686                 goto goon;
 687
 688         /*
 689          * at this point we are sure pegasus->rx_skb != NULL
 690          * so we go ahead and pass up the packet.
 691          */
 692         skb_put(pegasus->rx_skb, pkt_len);
 693         pegasus->rx_skb->protocol = eth_type_trans(pegasus->rx_skb, net);
 694         netif_rx(pegasus->rx_skb);
 695         pegasus->stats.rx_packets++;
 696         pegasus->stats.rx_bytes += pkt_len;
 697
 698         if (pegasus->flags & PEGASUS_UNPLUG)
 699                 return;
 700
 701         spin_lock(&pegasus->rx_pool_lock);
 702         pegasus->rx_skb = pull_skb(pegasus);
 703         spin_unlock(&pegasus->rx_pool_lock);
 704
 705         if (pegasus->rx_skb == NULL)
 706                 goto tl_sched;
 707 goon:
 708         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
 709                           usb_rcvbulkpipe(pegasus->usb, 1),
 710                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
 711                           read_bulk_callback, pegasus);
 712         rx_status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);
 713         if (rx_status == -ENODEV)
 714                 netif_device_detach(pegasus->net);
 715         else if (rx_status) {
 716                 pegasus->flags |= PEGASUS_RX_URB_FAIL;
 717                 goto tl_sched;
 718         } else {
 719                 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
 720         }
 721
 722         return;
 723
 724 tl_sched:
 725         tasklet_schedule(&pegasus->rx_tl);
 726 }
 727
 728 static void rx_fixup(unsigned long data)
 729 {
 730         pegasus_t *pegasus;
 731         unsigned long flags;
 732         int status;
 733
 734         pegasus = (pegasus_t *) data;
 735         if (pegasus->flags & PEGASUS_UNPLUG)
 736                 return;
 737
 738         spin_lock_irqsave(&pegasus->rx_pool_lock, flags);
 739         fill_skb_pool(pegasus);
 740         if (pegasus->flags & PEGASUS_RX_URB_FAIL)
 741                 if (pegasus->rx_skb)
 742                         goto try_again;
 743         if (pegasus->rx_skb == NULL) {
 744                 pegasus->rx_skb = pull_skb(pegasus);
 745         }
 746         if (pegasus->rx_skb == NULL) {
 747                 if (netif_msg_rx_err(pegasus))
 748                         printk(KERN_WARNING "%s: low on memory\n",
 749                                         pegasus->net->name);
 750                 tasklet_schedule(&pegasus->rx_tl);
 751                 goto done;
 752         }
 753         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
 754                           usb_rcvbulkpipe(pegasus->usb, 1),
 755                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
 756                           read_bulk_callback, pegasus);
 757 try_again:
 758         status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);
 759         if (status == -ENODEV)
 760                 netif_device_detach(pegasus->net);
 761         else if (status) {
 762                 pegasus->flags |= PEGASUS_RX_URB_FAIL;
 763                 tasklet_schedule(&pegasus->rx_tl);
 764         } else {
 765                 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
 766         }
 767 done:
 768         spin_unlock_irqrestore(&pegasus->rx_pool_lock, flags);
 769 }
 770
 771 static void write_bulk_callback(struct urb *urb)
 772 {
 773         pegasus_t *pegasus = urb->context;
 774         struct net_device *net;
 775         int status = urb->status;
 776
 777         if (!pegasus)
 778                 return;
 779
 780         net = pegasus->net;
 781
 782         if (!netif_device_present(net) || !netif_running(net))
 783                 return;
 784
 785         switch (status) {
 786         case -EPIPE:
 787                 /* FIXME schedule_work() to clear the tx halt */
 788                 netif_stop_queue(net);
 789                 if (netif_msg_tx_err(pegasus))
 790                         printk(KERN_WARNING "%s: no tx stall recovery\n",
 791                                         net->name);
 792                 return;
 793         case -ENOENT:
 794         case -ECONNRESET:
 795         case -ESHUTDOWN:
 796                 if (netif_msg_ifdown(pegasus))
 797                         pr_debug("%s: tx unlink, %d\n", net->name, status);
 798                 return;
 799         default:
 800                 if (netif_msg_tx_err(pegasus))
 801                         pr_info("%s: TX status %d\n", net->name, status);
 802                 /* FALL THROUGH */
 803         case 0:
 804                 break;
 805         }
 806
 807         net->trans_start = jiffies;
 808         netif_wake_queue(net);
 809 }
 810
 811 static void intr_callback(struct urb *urb)
 812 {
 813         pegasus_t *pegasus = urb->context;
 814         struct net_device *net;
 815         int res, status = urb->status;
 816
 817         if (!pegasus)
 818                 return;
 819         net = pegasus->net;
 820
 821         switch (status) {
 822         case 0:
 823                 break;
 824         case -ECONNRESET:       /* unlink */
 825         case -ENOENT:
 826         case -ESHUTDOWN:
 827                 return;
 828         default:
 829                 /* some Pegasus-I products report LOTS of data
 830                  * toggle errors... avoid log spamming
 831                  */
 832                 if (netif_msg_timer(pegasus))
 833                         pr_debug("%s: intr status %d\n", net->name,
 834                                         status);
 835         }
 836
 837         if (urb->actual_length >= 6) {
 838                 u8      * d = urb->transfer_buffer;
 839
 840                 /* byte 0 == tx_status1, reg 2B */
 841                 if (d[0] & (TX_UNDERRUN|EXCESSIVE_COL
 842                                         |LATE_COL|JABBER_TIMEOUT)) {
 843                         pegasus->stats.tx_errors++;
 844                         if (d[0] & TX_UNDERRUN)
 845                                 pegasus->stats.tx_fifo_errors++;
 846                         if (d[0] & (EXCESSIVE_COL | JABBER_TIMEOUT))
 847                                 pegasus->stats.tx_aborted_errors++;
 848                         if (d[0] & LATE_COL)
 849                                 pegasus->stats.tx_window_errors++;
 850                 }
 851
 852                 /* d[5].LINK_STATUS lies on some adapters.
 853                  * d[0].NO_CARRIER kicks in only with failed TX.
 854                  * ... so monitoring with MII may be safest.
 855                  */
 856
 857                 /* bytes 3-4 == rx_lostpkt, reg 2E/2F */
 858                 pegasus->stats.rx_missed_errors += ((d[3] & 0x7f) << 8) | d[4];
 859         }
 860
 861         res = usb_submit_urb(urb, GFP_ATOMIC);
 862         if (res == -ENODEV)
 863                 netif_device_detach(pegasus->net);
 864         if (res && netif_msg_timer(pegasus))
 865                 printk(KERN_ERR "%s: can't resubmit interrupt urb, %d\n",
 866                                 net->name, res);
 867 }
 868
 869 static void pegasus_tx_timeout(struct net_device *net)
 870 {
 871         pegasus_t *pegasus = netdev_priv(net);
 872         if (netif_msg_timer(pegasus))
 873                 printk(KERN_WARNING "%s: tx timeout\n", net->name);
 874         usb_unlink_urb(pegasus->tx_urb);
 875         pegasus->stats.tx_errors++;
 876 }
 877
 878 static int pegasus_start_xmit(struct sk_buff *skb, struct net_device *net)
 879 {
 880         pegasus_t *pegasus = netdev_priv(net);
 881         int count = ((skb->len + 2) & 0x3f) ? skb->len + 2 : skb->len + 3;
 882         int res;
 883         __u16 l16 = skb->len;
 884
 885         netif_stop_queue(net);
 886
 887         ((__le16 *) pegasus->tx_buff)[0] = cpu_to_le16(l16);
 888         skb_copy_from_linear_data(skb, pegasus->tx_buff + 2, skb->len);
 889         usb_fill_bulk_urb(pegasus->tx_urb, pegasus->usb,
 890                           usb_sndbulkpipe(pegasus->usb, 2),
 891                           pegasus->tx_buff, count,
 892                           write_bulk_callback, pegasus);
 893         if ((res = usb_submit_urb(pegasus->tx_urb, GFP_ATOMIC))) {
 894                 if (netif_msg_tx_err(pegasus))
 895                         printk(KERN_WARNING "%s: fail tx, %d\n",
 896                                         net->name, res);
 897                 switch (res) {
 898                 case -EPIPE:            /* stall, or disconnect from TT */
 899                         /* cleanup should already have been scheduled */
 900                         break;
 901                 case -ENODEV:           /* disconnect() upcoming */
 902                         netif_device_detach(pegasus->net);
 903                         break;
 904                 default:
 905                         pegasus->stats.tx_errors++;
 906                         netif_start_queue(net);
 907                 }
 908         } else {
 909                 pegasus->stats.tx_packets++;
 910                 pegasus->stats.tx_bytes += skb->len;
 911                 net->trans_start = jiffies;
 912         }
 913         dev_kfree_skb(skb);
 914
 915         return 0;
 916 }
 917
 918 static struct net_device_stats *pegasus_netdev_stats(struct net_device *dev)
 919 {
 920         return &((pegasus_t *) netdev_priv(dev))->stats;
 921 }
 922
 923 static inline void disable_net_traffic(pegasus_t * pegasus)
 924 {
 925         int tmp = 0;
 926
 927         set_registers(pegasus, EthCtrl0, 2, &tmp);
 928 }
 929
 930 static inline void get_interrupt_interval(pegasus_t * pegasus)
 931 {
 932         __u8 data[2];
 933
 934         read_eprom_word(pegasus, 4, (__u16 *) data);
 935         if (pegasus->usb->speed != USB_SPEED_HIGH) {
 936                 if (data[1] < 0x80) {
 937                         if (netif_msg_timer(pegasus))
 938                                 dev_info(&pegasus->intf->dev, "intr interval "
 939                                         "changed from %ums to %ums\n",
 940                                         data[1], 0x80);
 941                         data[1] = 0x80;
 942 #ifdef PEGASUS_WRITE_EEPROM
 943                         write_eprom_word(pegasus, 4, *(__u16 *) data);
 944 #endif
 945                 }
 946         }
 947         pegasus->intr_interval = data[1];
 948 }
 949
 950 static void set_carrier(struct net_device *net)
 951 {
 952         pegasus_t *pegasus = netdev_priv(net);
 953         u16 tmp;
 954
 955         if (read_mii_word(pegasus, pegasus->phy, MII_BMSR, &tmp))
 956                 return;
 957
 958         if (tmp & BMSR_LSTATUS)
 959                 netif_carrier_on(net);
 960         else
 961                 netif_carrier_off(net);
 962 }
 963
 964 static void free_all_urbs(pegasus_t * pegasus)
 965 {
 966         usb_free_urb(pegasus->intr_urb);
 967         usb_free_urb(pegasus->tx_urb);
 968         usb_free_urb(pegasus->rx_urb);
 969         usb_free_urb(pegasus->ctrl_urb);
 970 }
 971
 972 static void unlink_all_urbs(pegasus_t * pegasus)
 973 {
 974         usb_kill_urb(pegasus->intr_urb);
 975         usb_kill_urb(pegasus->tx_urb);
 976         usb_kill_urb(pegasus->rx_urb);
 977         usb_kill_urb(pegasus->ctrl_urb);
 978 }
 979
 980 static int alloc_urbs(pegasus_t * pegasus)
 981 {
 982         pegasus->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
 983         if (!pegasus->ctrl_urb) {
 984                 return 0;
 985         }
 986         pegasus->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 987         if (!pegasus->rx_urb) {
 988                 usb_free_urb(pegasus->ctrl_urb);
 989                 return 0;
 990         }
 991         pegasus->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 992         if (!pegasus->tx_urb) {
 993                 usb_free_urb(pegasus->rx_urb);
 994                 usb_free_urb(pegasus->ctrl_urb);
 995                 return 0;
 996         }
 997         pegasus->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
 998         if (!pegasus->intr_urb) {
 999                 usb_free_urb(pegasus->tx_urb);
1000                 usb_free_urb(pegasus->rx_urb);
1001                 usb_free_urb(pegasus->ctrl_urb);
1002                 return 0;
1003         }
1004
1005         return 1;
1006 }
1007
1008 static int pegasus_open(struct net_device *net)
1009 {
1010         pegasus_t *pegasus = netdev_priv(net);
1011         int res;
1012
1013         if (pegasus->rx_skb == NULL)
1014                 pegasus->rx_skb = pull_skb(pegasus);
1015         /*
1016          ** Note: no point to free the pool.  it is empty :-)
1017          */
1018         if (!pegasus->rx_skb)
1019                 return -ENOMEM;
1020
1021         res = set_registers(pegasus, EthID, 6, net->dev_addr);
1022
1023         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
1024                           usb_rcvbulkpipe(pegasus->usb, 1),
1025                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
1026                           read_bulk_callback, pegasus);
1027         if ((res = usb_submit_urb(pegasus->rx_urb, GFP_KERNEL))) {
1028                 if (res == -ENODEV)
1029                         netif_device_detach(pegasus->net);
1030                 if (netif_msg_ifup(pegasus))
1031                         pr_debug("%s: failed rx_urb, %d", net->name, res);
1032                 goto exit;
1033         }
1034
1035         usb_fill_int_urb(pegasus->intr_urb, pegasus->usb,
1036                          usb_rcvintpipe(pegasus->usb, 3),
1037                          pegasus->intr_buff, sizeof (pegasus->intr_buff),
1038                          intr_callback, pegasus, pegasus->intr_interval);
1039         if ((res = usb_submit_urb(pegasus->intr_urb, GFP_KERNEL))) {
1040                 if (res == -ENODEV)
1041                         netif_device_detach(pegasus->net);
1042                 if (netif_msg_ifup(pegasus))
1043                         pr_debug("%s: failed intr_urb, %d\n", net->name, res);
1044                 usb_kill_urb(pegasus->rx_urb);
1045                 goto exit;
1046         }
1047         if ((res = enable_net_traffic(net, pegasus->usb))) {
1048                 if (netif_msg_ifup(pegasus))
1049                         pr_debug("%s: can't enable_net_traffic() - %d\n",
1050                                         net->name, res);
1051                 res = -EIO;
1052                 usb_kill_urb(pegasus->rx_urb);
1053                 usb_kill_urb(pegasus->intr_urb);
1054                 free_skb_pool(pegasus);
1055                 goto exit;
1056         }
1057         set_carrier(net);
1058         netif_start_queue(net);
1059         if (netif_msg_ifup(pegasus))
1060                 pr_debug("%s: open\n", net->name);
1061         res = 0;
1062 exit:
1063         return res;
1064 }
1065
1066 static int pegasus_close(struct net_device *net)
1067 {
1068         pegasus_t *pegasus = netdev_priv(net);
1069
1070         netif_stop_queue(net);
1071         if (!(pegasus->flags & PEGASUS_UNPLUG))
1072                 disable_net_traffic(pegasus);
1073         tasklet_kill(&pegasus->rx_tl);
1074         unlink_all_urbs(pegasus);
1075
1076         return 0;
1077 }
1078
1079 static void pegasus_get_drvinfo(struct net_device *dev,
1080                                 struct ethtool_drvinfo *info)
1081 {
1082         pegasus_t *pegasus = netdev_priv(dev);
1083         strncpy(info->driver, driver_name, sizeof (info->driver) - 1);
1084         strncpy(info->version, DRIVER_VERSION, sizeof (info->version) - 1);
1085         usb_make_path(pegasus->usb, info->bus_info, sizeof (info->bus_info));
1086 }
1087
1088 /* also handles three patterns of some kind in hardware */
1089 #define WOL_SUPPORTED   (WAKE_MAGIC|WAKE_PHY)
1090
1091 static void
1092 pegasus_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1093 {
1094         pegasus_t       *pegasus = netdev_priv(dev);
1095
1096         wol->supported = WAKE_MAGIC | WAKE_PHY;
1097         wol->wolopts = pegasus->wolopts;
1098 }
1099
1100 static int
1101 pegasus_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1102 {
1103         pegasus_t       *pegasus = netdev_priv(dev);
1104         u8              reg78 = 0x04;
1105
1106         if (wol->wolopts & ~WOL_SUPPORTED)
1107                 return -EINVAL;
1108
1109         if (wol->wolopts & WAKE_MAGIC)
1110                 reg78 |= 0x80;
1111         if (wol->wolopts & WAKE_PHY)
1112                 reg78 |= 0x40;
1113         /* FIXME this 0x10 bit still needs to get set in the chip... */
1114         if (wol->wolopts)
1115                 pegasus->eth_regs[0] |= 0x10;
1116         else
1117                 pegasus->eth_regs[0] &= ~0x10;
1118         pegasus->wolopts = wol->wolopts;
1119         return set_register(pegasus, WakeupControl, reg78);
1120 }
1121
1122 static inline void pegasus_reset_wol(struct net_device *dev)
1123 {
1124         struct ethtool_wolinfo wol;
1125
1126         memset(&wol, 0, sizeof wol);
1127         (void) pegasus_set_wol(dev, &wol);
1128 }
1129
1130 static int
1131 pegasus_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1132 {
1133         pegasus_t *pegasus;
1134
1135         pegasus = netdev_priv(dev);
1136         mii_ethtool_gset(&pegasus->mii, ecmd);
1137         return 0;
1138 }
1139
1140 static int
1141 pegasus_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1142 {
1143         pegasus_t *pegasus = netdev_priv(dev);
1144         return mii_ethtool_sset(&pegasus->mii, ecmd);
1145 }
1146
1147 static int pegasus_nway_reset(struct net_device *dev)
1148 {
1149         pegasus_t *pegasus = netdev_priv(dev);
1150         return mii_nway_restart(&pegasus->mii);
1151 }
1152
1153 static u32 pegasus_get_link(struct net_device *dev)
1154 {
1155         pegasus_t *pegasus = netdev_priv(dev);
1156         return mii_link_ok(&pegasus->mii);
1157 }
1158
1159 static u32 pegasus_get_msglevel(struct net_device *dev)
1160 {
1161         pegasus_t *pegasus = netdev_priv(dev);
1162         return pegasus->msg_enable;
1163 }
1164
1165 static void pegasus_set_msglevel(struct net_device *dev, u32 v)
1166 {
1167         pegasus_t *pegasus = netdev_priv(dev);
1168         pegasus->msg_enable = v;
1169 }
1170
1171 static struct ethtool_ops ops = {
1172         .get_drvinfo = pegasus_get_drvinfo,
1173         .get_settings = pegasus_get_settings,
1174         .set_settings = pegasus_set_settings,
1175         .nway_reset = pegasus_nway_reset,
1176         .get_link = pegasus_get_link,
1177         .get_msglevel = pegasus_get_msglevel,
1178         .set_msglevel = pegasus_set_msglevel,
1179         .get_wol = pegasus_get_wol,
1180         .set_wol = pegasus_set_wol,
1181 };
1182
1183 static int pegasus_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
1184 {
1185         __u16 *data = (__u16 *) & rq->ifr_ifru;
1186         pegasus_t *pegasus = netdev_priv(net);
1187         int res;
1188
1189         switch (cmd) {
1190         case SIOCDEVPRIVATE:
1191                 data[0] = pegasus->phy;
1192         case SIOCDEVPRIVATE + 1:
1193                 read_mii_word(pegasus, data[0], data[1] & 0x1f, &data[3]);
1194                 res = 0;
1195                 break;
1196         case SIOCDEVPRIVATE + 2:
1197                 if (!capable(CAP_NET_ADMIN))
1198                         return -EPERM;
1199                 write_mii_word(pegasus, pegasus->phy, data[1] & 0x1f, data[2]);
1200                 res = 0;
1201                 break;
1202         default:
1203                 res = -EOPNOTSUPP;
1204         }
1205         return res;
1206 }
1207
1208 static void pegasus_set_multicast(struct net_device *net)
1209 {
1210         pegasus_t *pegasus = netdev_priv(net);
1211
1212         if (net->flags & IFF_PROMISC) {
1213                 pegasus->eth_regs[EthCtrl2] |= RX_PROMISCUOUS;
1214                 if (netif_msg_link(pegasus))
1215                         pr_info("%s: Promiscuous mode enabled.\n", net->name);
1216         } else if (net->mc_count || (net->flags & IFF_ALLMULTI)) {
1217                 pegasus->eth_regs[EthCtrl0] |= RX_MULTICAST;
1218                 pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1219                 if (netif_msg_link(pegasus))
1220                         pr_debug("%s: set allmulti\n", net->name);
1221         } else {
1222                 pegasus->eth_regs[EthCtrl0] &= ~RX_MULTICAST;
1223                 pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1224         }
1225
1226         pegasus->ctrl_urb->status = 0;
1227
1228         pegasus->flags |= ETH_REGS_CHANGE;
1229         ctrl_callback(pegasus->ctrl_urb);
1230 }
1231
1232 static __u8 mii_phy_probe(pegasus_t * pegasus)
1233 {
1234         int i;
1235         __u16 tmp;
1236
1237         for (i = 0; i < 32; i++) {
1238                 read_mii_word(pegasus, i, MII_BMSR, &tmp);
1239                 if (tmp == 0 || tmp == 0xffff || (tmp & BMSR_MEDIA) == 0)
1240                         continue;
1241                 else
1242                         return i;
1243         }
1244
1245         return 0xff;
1246 }
1247
1248 static inline void setup_pegasus_II(pegasus_t * pegasus)
1249 {
1250         __u8 data = 0xa5;
1251
1252         set_register(pegasus, Reg1d, 0);
1253         set_register(pegasus, Reg7b, 1);
1254         mdelay(100);
1255         if ((pegasus->features & HAS_HOME_PNA) && mii_mode)
1256                 set_register(pegasus, Reg7b, 0);
1257         else
1258                 set_register(pegasus, Reg7b, 2);
1259
1260         set_register(pegasus, 0x83, data);
1261         get_registers(pegasus, 0x83, 1, &data);
1262
1263         if (data == 0xa5) {
1264                 pegasus->chip = 0x8513;
1265         } else {
1266                 pegasus->chip = 0;
1267         }
1268
1269         set_register(pegasus, 0x80, 0xc0);
1270         set_register(pegasus, 0x83, 0xff);
1271         set_register(pegasus, 0x84, 0x01);
1272
1273         if (pegasus->features & HAS_HOME_PNA && mii_mode)
1274                 set_register(pegasus, Reg81, 6);
1275         else
1276                 set_register(pegasus, Reg81, 2);
1277 }
1278
1279
1280 static int pegasus_count;
1281 static struct workqueue_struct *pegasus_workqueue = NULL;
1282 #define CARRIER_CHECK_DELAY (2 * HZ)
1283
1284 static void check_carrier(struct work_struct *work)
1285 {
1286         pegasus_t *pegasus = container_of(work, pegasus_t, carrier_check.work);
1287         set_carrier(pegasus->net);
1288         if (!(pegasus->flags & PEGASUS_UNPLUG)) {
1289                 queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1290                         CARRIER_CHECK_DELAY);
1291         }
1292 }
1293
1294 static int pegasus_blacklisted(struct usb_device *udev)
1295 {
1296         struct usb_device_descriptor *udd = &udev->descriptor;
1297
1298         /* Special quirk to keep the driver from handling the Belkin Bluetooth
1299          * dongle which happens to have the same ID.
1300          */
1301         if ((udd->idVendor == VENDOR_BELKIN && udd->idProduct == 0x0121) &&
1302             (udd->bDeviceClass == USB_CLASS_WIRELESS_CONTROLLER) &&
1303             (udd->bDeviceProtocol == 1))
1304                 return 1;
1305
1306         return 0;
1307 }
1308
1309 /* we rely on probe() and remove() being serialized so we
1310  * don't need extra locking on pegasus_count.
1311  */
1312 static void pegasus_dec_workqueue(void)
1313 {
1314         pegasus_count--;
1315         if (pegasus_count == 0) {
1316                 destroy_workqueue(pegasus_workqueue);
1317                 pegasus_workqueue = NULL;
1318         }
1319 }
1320
1321 static int pegasus_probe(struct usb_interface *intf,
1322                          const struct usb_device_id *id)
1323 {
1324         struct usb_device *dev = interface_to_usbdev(intf);
1325         struct net_device *net;
1326         pegasus_t *pegasus;
1327         int dev_index = id - pegasus_ids;
1328         int res = -ENOMEM;
1329
1330         if (pegasus_blacklisted(dev))
1331                 return -ENODEV;
1332
1333         if (pegasus_count == 0) {
1334                 pegasus_workqueue = create_singlethread_workqueue("pegasus");
1335                 if (!pegasus_workqueue)
1336                         return -ENOMEM;
1337         }
1338         pegasus_count++;
1339
1340         usb_get_dev(dev);
1341
1342         net = alloc_etherdev(sizeof(struct pegasus));
1343         if (!net) {
1344                 dev_err(&intf->dev, "can't allocate %s\n", "device");
1345                 goto out;
1346         }
1347
1348         pegasus = netdev_priv(net);
1349         pegasus->dev_index = dev_index;
1350         init_waitqueue_head(&pegasus->ctrl_wait);
1351
1352         if (!alloc_urbs(pegasus)) {
1353                 dev_err(&intf->dev, "can't allocate %s\n", "urbs");
1354                 goto out1;
1355         }
1356
1357         tasklet_init(&pegasus->rx_tl, rx_fixup, (unsigned long) pegasus);
1358
1359         INIT_DELAYED_WORK(&pegasus->carrier_check, check_carrier);
1360
1361         pegasus->intf = intf;
1362         pegasus->usb = dev;
1363         pegasus->net = net;
1364
1365
1366         net->watchdog_timeo = PEGASUS_TX_TIMEOUT;
1367         net->netdev_ops = &pegasus_netdev_ops;
1368         SET_ETHTOOL_OPS(net, &ops);
1369         pegasus->mii.dev = net;
1370         pegasus->mii.mdio_read = mdio_read;
1371         pegasus->mii.mdio_write = mdio_write;
1372         pegasus->mii.phy_id_mask = 0x1f;
1373         pegasus->mii.reg_num_mask = 0x1f;
1374         spin_lock_init(&pegasus->rx_pool_lock);
1375         pegasus->msg_enable = netif_msg_init (msg_level, NETIF_MSG_DRV
1376                                 | NETIF_MSG_PROBE | NETIF_MSG_LINK);
1377
1378         pegasus->features = usb_dev_id[dev_index].private;
1379         get_interrupt_interval(pegasus);
1380         if (reset_mac(pegasus)) {
1381                 dev_err(&intf->dev, "can't reset MAC\n");
1382                 res = -EIO;
1383                 goto out2;
1384         }
1385         set_ethernet_addr(pegasus);
1386         fill_skb_pool(pegasus);
1387         if (pegasus->features & PEGASUS_II) {
1388                 dev_info(&intf->dev, "setup Pegasus II specific registers\n");
1389                 setup_pegasus_II(pegasus);
1390         }
1391         pegasus->phy = mii_phy_probe(pegasus);
1392         if (pegasus->phy == 0xff) {
1393                 dev_warn(&intf->dev, "can't locate MII phy, using default\n");
1394                 pegasus->phy = 1;
1395         }
1396         pegasus->mii.phy_id = pegasus->phy;
1397         usb_set_intfdata(intf, pegasus);
1398         SET_NETDEV_DEV(net, &intf->dev);
1399         pegasus_reset_wol(net);
1400         res = register_netdev(net);
1401         if (res)
1402                 goto out3;
1403         queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1404                                 CARRIER_CHECK_DELAY);
1405
1406         dev_info(&intf->dev, "%s, %s, %pM\n",
1407                  net->name,
1408                  usb_dev_id[dev_index].name,
1409                  net->dev_addr);
1410         return 0;
1411
1412 out3:
1413         usb_set_intfdata(intf, NULL);
1414         free_skb_pool(pegasus);
1415 out2:
1416         free_all_urbs(pegasus);
1417 out1:
1418         free_netdev(net);
1419 out:
1420         usb_put_dev(dev);
1421         pegasus_dec_workqueue();
1422         return res;
1423 }
1424
1425 static void pegasus_disconnect(struct usb_interface *intf)
1426 {
1427         struct pegasus *pegasus = usb_get_intfdata(intf);
1428
1429         usb_set_intfdata(intf, NULL);
1430         if (!pegasus) {
1431                 dev_dbg(&intf->dev, "unregistering non-bound device?\n");
1432                 return;
1433         }
1434
1435         pegasus->flags |= PEGASUS_UNPLUG;
1436         cancel_delayed_work(&pegasus->carrier_check);
1437         unregister_netdev(pegasus->net);
1438         usb_put_dev(interface_to_usbdev(intf));
1439         unlink_all_urbs(pegasus);
1440         free_all_urbs(pegasus);
1441         free_skb_pool(pegasus);
1442         if (pegasus->rx_skb != NULL) {
1443                 dev_kfree_skb(pegasus->rx_skb);
1444                 pegasus->rx_skb = NULL;
1445         }
1446         free_netdev(pegasus->net);
1447         pegasus_dec_workqueue();
1448 }
1449
1450 static int pegasus_suspend (struct usb_interface *intf, pm_message_t message)
1451 {
1452         struct pegasus *pegasus = usb_get_intfdata(intf);
1453
1454         netif_device_detach (pegasus->net);
1455         cancel_delayed_work(&pegasus->carrier_check);
1456         if (netif_running(pegasus->net)) {
1457                 usb_kill_urb(pegasus->rx_urb);
1458                 usb_kill_urb(pegasus->intr_urb);
1459         }
1460         return 0;
1461 }
1462
1463 static int pegasus_resume (struct usb_interface *intf)
1464 {
1465         struct pegasus *pegasus = usb_get_intfdata(intf);
1466
1467         netif_device_attach (pegasus->net);
1468         if (netif_running(pegasus->net)) {
1469                 pegasus->rx_urb->status = 0;
1470                 pegasus->rx_urb->actual_length = 0;
1471                 read_bulk_callback(pegasus->rx_urb);
1472
1473                 pegasus->intr_urb->status = 0;
1474                 pegasus->intr_urb->actual_length = 0;
1475                 intr_callback(pegasus->intr_urb);
1476         }
1477         queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1478                                 CARRIER_CHECK_DELAY);
1479         return 0;
1480 }
1481
1482 static const struct net_device_ops pegasus_netdev_ops = {
1483         .ndo_open =                     pegasus_open,
1484         .ndo_stop =                     pegasus_close,
1485         .ndo_do_ioctl =                 pegasus_ioctl,
1486         .ndo_start_xmit =               pegasus_start_xmit,
1487         .ndo_set_multicast_list =       pegasus_set_multicast,
1488         .ndo_get_stats =                pegasus_netdev_stats,
1489         .ndo_tx_timeout =               pegasus_tx_timeout,
1490 };
1491
1492 static struct usb_driver pegasus_driver = {
1493         .name = driver_name,
1494         .probe = pegasus_probe,
1495         .disconnect = pegasus_disconnect,
1496         .id_table = pegasus_ids,
1497         .suspend = pegasus_suspend,
1498         .resume = pegasus_resume,
1499 };
1500
1501 static void __init parse_id(char *id)
1502 {
1503         unsigned int vendor_id=0, device_id=0, flags=0, i=0;
1504         char *token, *name=NULL;
1505
1506         if ((token = strsep(&id, ":")) != NULL)
1507                 name = token;
1508         /* name now points to a null terminated string*/
1509         if ((token = strsep(&id, ":")) != NULL)
1510                 vendor_id = simple_strtoul(token, NULL, 16);
1511         if ((token = strsep(&id, ":")) != NULL)
1512                 device_id = simple_strtoul(token, NULL, 16);
1513         flags = simple_strtoul(id, NULL, 16);
1514         pr_info("%s: new device %s, vendor ID 0x%04x, device ID 0x%04x, flags: 0x%x\n",
1515                 driver_name, name, vendor_id, device_id, flags);
1516
1517         if (vendor_id > 0x10000 || vendor_id == 0)
1518                 return;
1519         if (device_id > 0x10000 || device_id == 0)
1520                 return;
1521
1522         for (i=0; usb_dev_id[i].name; i++);
1523         usb_dev_id[i].name = name;
1524         usb_dev_id[i].vendor = vendor_id;
1525         usb_dev_id[i].device = device_id;
1526         usb_dev_id[i].private = flags;
1527         pegasus_ids[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
1528         pegasus_ids[i].idVendor = vendor_id;
1529         pegasus_ids[i].idProduct = device_id;
1530 }
1531
1532 static int __init pegasus_init(void)
1533 {
1534         pr_info("%s: %s, " DRIVER_DESC "\n", driver_name, DRIVER_VERSION);
1535         if (devid)
1536                 parse_id(devid);
1537         return usb_register(&pegasus_driver);
1538 }
1539
1540 static void __exit pegasus_exit(void)
1541 {
1542         usb_deregister(&pegasus_driver);
1543 }
1544
1545 module_init(pegasus_init);
1546 module_exit(pegasus_exit);