git.oblomov.eu Git - linux-2.6/blob - drivers/usb/net/pegasus.c

   1 /*
   2  *  Copyright (c) 1999-2005 Petko Manolov (petkan@users.sourceforge.net)
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  *
   8  *      ChangeLog:
   9  *              ....    Most of the time spent on reading sources & docs.
  10  *              v0.2.x  First official release for the Linux kernel.
  11  *              v0.3.0  Beutified and structured, some bugs fixed.
  12  *              v0.3.x  URBifying bulk requests and bugfixing. First relatively
  13  *                      stable release. Still can touch device's registers only
  14  *                      from top-halves.
  15  *              v0.4.0  Control messages remained unurbified are now URBs.
  16  *                      Now we can touch the HW at any time.
  17  *              v0.4.9  Control urbs again use process context to wait. Argh...
  18  *                      Some long standing bugs (enable_net_traffic) fixed.
  19  *                      Also nasty trick about resubmiting control urb from
  20  *                      interrupt context used. Please let me know how it
  21  *                      behaves. Pegasus II support added since this version.
  22  *                      TODO: suppressing HCD warnings spewage on disconnect.
  23  *              v0.4.13 Ethernet address is now set at probe(), not at open()
  24  *                      time as this seems to break dhcpd.
  25  *              v0.5.0  branch to 2.5.x kernels
  26  *              v0.5.1  ethtool support added
  27  *              v0.5.5  rx socket buffers are in a pool and the their allocation
  28  *                      is out of the interrupt routine.
  29  */
  30
  31 #include <linux/sched.h>
  32 #include <linux/slab.h>
  33 #include <linux/init.h>
  34 #include <linux/delay.h>
  35 #include <linux/netdevice.h>
  36 #include <linux/etherdevice.h>
  37 #include <linux/ethtool.h>
  38 #include <linux/mii.h>
  39 #include <linux/usb.h>
  40 #include <linux/module.h>
  41 #include <asm/byteorder.h>
  42 #include <asm/uaccess.h>
  43 #include "pegasus.h"
  44
  45 /*
  46  * Version Information
  47  */
  48 #define DRIVER_VERSION "v0.6.14 (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
 103         if (!pegasus)
 104                 return;
 105
 106         switch (urb->status) {
 107         case 0:
 108                 if (pegasus->flags & ETH_REGS_CHANGE) {
 109                         pegasus->flags &= ~ETH_REGS_CHANGE;
 110                         pegasus->flags |= ETH_REGS_CHANGED;
 111                         update_eth_regs_async(pegasus);
 112                         return;
 113                 }
 114                 break;
 115         case -EINPROGRESS:
 116                 return;
 117         case -ENOENT:
 118                 break;
 119         default:
 120                 if (netif_msg_drv(pegasus))
 121                         dev_dbg(&pegasus->intf->dev, "%s, status %d\n",
 122                                 __FUNCTION__, urb->status);
 123         }
 124         pegasus->flags &= ~ETH_REGS_CHANGED;
 125         wake_up(&pegasus->ctrl_wait);
 126 }
 127
 128 static int get_registers(pegasus_t * pegasus, __u16 indx, __u16 size,
 129                          void *data)
 130 {
 131         int ret;
 132         char *buffer;
 133         DECLARE_WAITQUEUE(wait, current);
 134
 135         buffer = kmalloc(size, GFP_KERNEL);
 136         if (!buffer) {
 137                 if (netif_msg_drv(pegasus))
 138                         dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
 139                                         __FUNCTION__);
 140                 return -ENOMEM;
 141         }
 142         add_wait_queue(&pegasus->ctrl_wait, &wait);
 143         set_current_state(TASK_UNINTERRUPTIBLE);
 144         while (pegasus->flags & ETH_REGS_CHANGED)
 145                 schedule();
 146         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 147         set_current_state(TASK_RUNNING);
 148
 149         pegasus->dr.bRequestType = PEGASUS_REQT_READ;
 150         pegasus->dr.bRequest = PEGASUS_REQ_GET_REGS;
 151         pegasus->dr.wValue = cpu_to_le16(0);
 152         pegasus->dr.wIndex = cpu_to_le16p(&indx);
 153         pegasus->dr.wLength = cpu_to_le16p(&size);
 154         pegasus->ctrl_urb->transfer_buffer_length = size;
 155
 156         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 157                              usb_rcvctrlpipe(pegasus->usb, 0),
 158                              (char *) &pegasus->dr,
 159                              buffer, size, ctrl_callback, pegasus);
 160
 161         add_wait_queue(&pegasus->ctrl_wait, &wait);
 162         set_current_state(TASK_UNINTERRUPTIBLE);
 163
 164         /* using ATOMIC, we'd never wake up if we slept */
 165         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 166                 set_current_state(TASK_RUNNING);
 167                 if (ret == -ENODEV)
 168                         netif_device_detach(pegasus->net);
 169                 if (netif_msg_drv(pegasus))
 170                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 171                                         __FUNCTION__, ret);
 172                 goto out;
 173         }
 174
 175         schedule();
 176 out:
 177         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 178         memcpy(data, buffer, size);
 179         kfree(buffer);
 180
 181         return ret;
 182 }
 183
 184 static int set_registers(pegasus_t * pegasus, __u16 indx, __u16 size,
 185                          void *data)
 186 {
 187         int ret;
 188         char *buffer;
 189         DECLARE_WAITQUEUE(wait, current);
 190
 191         buffer = kmalloc(size, GFP_KERNEL);
 192         if (!buffer) {
 193                 if (netif_msg_drv(pegasus))
 194                         dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
 195                                         __FUNCTION__);
 196                 return -ENOMEM;
 197         }
 198         memcpy(buffer, data, size);
 199
 200         add_wait_queue(&pegasus->ctrl_wait, &wait);
 201         set_current_state(TASK_UNINTERRUPTIBLE);
 202         while (pegasus->flags & ETH_REGS_CHANGED)
 203                 schedule();
 204         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 205         set_current_state(TASK_RUNNING);
 206
 207         pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
 208         pegasus->dr.bRequest = PEGASUS_REQ_SET_REGS;
 209         pegasus->dr.wValue = cpu_to_le16(0);
 210         pegasus->dr.wIndex = cpu_to_le16p(&indx);
 211         pegasus->dr.wLength = cpu_to_le16p(&size);
 212         pegasus->ctrl_urb->transfer_buffer_length = size;
 213
 214         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 215                              usb_sndctrlpipe(pegasus->usb, 0),
 216                              (char *) &pegasus->dr,
 217                              buffer, size, ctrl_callback, pegasus);
 218
 219         add_wait_queue(&pegasus->ctrl_wait, &wait);
 220         set_current_state(TASK_UNINTERRUPTIBLE);
 221
 222         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 223                 if (ret == -ENODEV)
 224                         netif_device_detach(pegasus->net);
 225                 if (netif_msg_drv(pegasus))
 226                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 227                                         __FUNCTION__, ret);
 228                 goto out;
 229         }
 230
 231         schedule();
 232 out:
 233         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 234         kfree(buffer);
 235
 236         return ret;
 237 }
 238
 239 static int set_register(pegasus_t * pegasus, __u16 indx, __u8 data)
 240 {
 241         int ret;
 242         char *tmp;
 243         DECLARE_WAITQUEUE(wait, current);
 244
 245         tmp = kmalloc(1, GFP_KERNEL);
 246         if (!tmp) {
 247                 if (netif_msg_drv(pegasus))
 248                         dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
 249                                         __FUNCTION__);
 250                 return -ENOMEM;
 251         }
 252         memcpy(tmp, &data, 1);
 253         add_wait_queue(&pegasus->ctrl_wait, &wait);
 254         set_current_state(TASK_UNINTERRUPTIBLE);
 255         while (pegasus->flags & ETH_REGS_CHANGED)
 256                 schedule();
 257         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 258         set_current_state(TASK_RUNNING);
 259
 260         pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
 261         pegasus->dr.bRequest = PEGASUS_REQ_SET_REG;
 262         pegasus->dr.wValue = cpu_to_le16(data);
 263         pegasus->dr.wIndex = cpu_to_le16p(&indx);
 264         pegasus->dr.wLength = cpu_to_le16(1);
 265         pegasus->ctrl_urb->transfer_buffer_length = 1;
 266
 267         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 268                              usb_sndctrlpipe(pegasus->usb, 0),
 269                              (char *) &pegasus->dr,
 270                              tmp, 1, ctrl_callback, pegasus);
 271
 272         add_wait_queue(&pegasus->ctrl_wait, &wait);
 273         set_current_state(TASK_UNINTERRUPTIBLE);
 274
 275         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 276                 if (ret == -ENODEV)
 277                         netif_device_detach(pegasus->net);
 278                 if (netif_msg_drv(pegasus))
 279                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 280                                         __FUNCTION__, ret);
 281                 goto out;
 282         }
 283
 284         schedule();
 285 out:
 286         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 287         kfree(tmp);
 288
 289         return ret;
 290 }
 291
 292 static int update_eth_regs_async(pegasus_t * pegasus)
 293 {
 294         int ret;
 295
 296         pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
 297         pegasus->dr.bRequest = PEGASUS_REQ_SET_REGS;
 298         pegasus->dr.wValue = 0;
 299         pegasus->dr.wIndex = cpu_to_le16(EthCtrl0);
 300         pegasus->dr.wLength = cpu_to_le16(3);
 301         pegasus->ctrl_urb->transfer_buffer_length = 3;
 302
 303         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 304                              usb_sndctrlpipe(pegasus->usb, 0),
 305                              (char *) &pegasus->dr,
 306                              pegasus->eth_regs, 3, ctrl_callback, pegasus);
 307
 308         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 309                 if (ret == -ENODEV)
 310                         netif_device_detach(pegasus->net);
 311                 if (netif_msg_drv(pegasus))
 312                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 313                                         __FUNCTION__, ret);
 314         }
 315
 316         return ret;
 317 }
 318
 319 /* Returns 0 on success, error on failure */
 320 static int read_mii_word(pegasus_t * pegasus, __u8 phy, __u8 indx, __u16 * regd)
 321 {
 322         int i;
 323         __u8 data[4] = { phy, 0, 0, indx };
 324         __le16 regdi;
 325         int ret;
 326
 327         set_register(pegasus, PhyCtrl, 0);
 328         set_registers(pegasus, PhyAddr, sizeof (data), data);
 329         set_register(pegasus, PhyCtrl, (indx | PHY_READ));
 330         for (i = 0; i < REG_TIMEOUT; i++) {
 331                 ret = get_registers(pegasus, PhyCtrl, 1, data);
 332                 if (ret == -ESHUTDOWN)
 333                         goto fail;
 334                 if (data[0] & PHY_DONE)
 335                         break;
 336         }
 337         if (i < REG_TIMEOUT) {
 338                 ret = get_registers(pegasus, PhyData, 2, &regdi);
 339                 *regd = le16_to_cpu(regdi);
 340                 return ret;
 341         }
 342 fail:
 343         if (netif_msg_drv(pegasus))
 344                 dev_warn(&pegasus->intf->dev, "%s failed\n", __FUNCTION__);
 345
 346         return ret;
 347 }
 348
 349 static int mdio_read(struct net_device *dev, int phy_id, int loc)
 350 {
 351         pegasus_t *pegasus = (pegasus_t *) netdev_priv(dev);
 352         u16 res;
 353
 354         read_mii_word(pegasus, phy_id, loc, &res);
 355         return (int)res;
 356 }
 357
 358 static int write_mii_word(pegasus_t * pegasus, __u8 phy, __u8 indx, __u16 regd)
 359 {
 360         int i;
 361         __u8 data[4] = { phy, 0, 0, indx };
 362         int ret;
 363
 364         data[1] = (u8) regd;
 365         data[2] = (u8) (regd >> 8);
 366         set_register(pegasus, PhyCtrl, 0);
 367         set_registers(pegasus, PhyAddr, sizeof(data), data);
 368         set_register(pegasus, PhyCtrl, (indx | PHY_WRITE));
 369         for (i = 0; i < REG_TIMEOUT; i++) {
 370                 ret = get_registers(pegasus, PhyCtrl, 1, data);
 371                 if (ret == -ESHUTDOWN)
 372                         goto fail;
 373                 if (data[0] & PHY_DONE)
 374                         break;
 375         }
 376         if (i < REG_TIMEOUT)
 377                 return ret;
 378
 379 fail:
 380         if (netif_msg_drv(pegasus))
 381                 dev_warn(&pegasus->intf->dev, "%s failed\n", __FUNCTION__);
 382         return -ETIMEDOUT;
 383 }
 384
 385 static void mdio_write(struct net_device *dev, int phy_id, int loc, int val)
 386 {
 387         pegasus_t *pegasus = (pegasus_t *) netdev_priv(dev);
 388
 389         write_mii_word(pegasus, phy_id, loc, val);
 390 }
 391
 392 static int read_eprom_word(pegasus_t * pegasus, __u8 index, __u16 * retdata)
 393 {
 394         int i;
 395         __u8 tmp;
 396         __le16 retdatai;
 397         int ret;
 398
 399         set_register(pegasus, EpromCtrl, 0);
 400         set_register(pegasus, EpromOffset, index);
 401         set_register(pegasus, EpromCtrl, EPROM_READ);
 402
 403         for (i = 0; i < REG_TIMEOUT; i++) {
 404                 ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
 405                 if (tmp & EPROM_DONE)
 406                         break;
 407                 if (ret == -ESHUTDOWN)
 408                         goto fail;
 409         }
 410         if (i < REG_TIMEOUT) {
 411                 ret = get_registers(pegasus, EpromData, 2, &retdatai);
 412                 *retdata = le16_to_cpu(retdatai);
 413                 return ret;
 414         }
 415
 416 fail:
 417         if (netif_msg_drv(pegasus))
 418                 dev_warn(&pegasus->intf->dev, "%s failed\n", __FUNCTION__);
 419         return -ETIMEDOUT;
 420 }
 421
 422 #ifdef  PEGASUS_WRITE_EEPROM
 423 static inline void enable_eprom_write(pegasus_t * pegasus)
 424 {
 425         __u8 tmp;
 426         int ret;
 427
 428         get_registers(pegasus, EthCtrl2, 1, &tmp);
 429         set_register(pegasus, EthCtrl2, tmp | EPROM_WR_ENABLE);
 430 }
 431
 432 static inline void disable_eprom_write(pegasus_t * pegasus)
 433 {
 434         __u8 tmp;
 435         int ret;
 436
 437         get_registers(pegasus, EthCtrl2, 1, &tmp);
 438         set_register(pegasus, EpromCtrl, 0);
 439         set_register(pegasus, EthCtrl2, tmp & ~EPROM_WR_ENABLE);
 440 }
 441
 442 static int write_eprom_word(pegasus_t * pegasus, __u8 index, __u16 data)
 443 {
 444         int i;
 445         __u8 tmp, d[4] = { 0x3f, 0, 0, EPROM_WRITE };
 446         int ret;
 447
 448         set_registers(pegasus, EpromOffset, 4, d);
 449         enable_eprom_write(pegasus);
 450         set_register(pegasus, EpromOffset, index);
 451         set_registers(pegasus, EpromData, 2, &data);
 452         set_register(pegasus, EpromCtrl, EPROM_WRITE);
 453
 454         for (i = 0; i < REG_TIMEOUT; i++) {
 455                 ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
 456                 if (ret == -ESHUTDOWN)
 457                         goto fail;
 458                 if (tmp & EPROM_DONE)
 459                         break;
 460         }
 461         disable_eprom_write(pegasus);
 462         if (i < REG_TIMEOUT)
 463                 return ret;
 464 fail:
 465         if (netif_msg_drv(pegasus))
 466                 dev_warn(&pegasus->intf->dev, "%s failed\n", __FUNCTION__);
 467         return -ETIMEDOUT;
 468 }
 469 #endif                          /* PEGASUS_WRITE_EEPROM */
 470
 471 static inline void get_node_id(pegasus_t * pegasus, __u8 * id)
 472 {
 473         int i;
 474         __u16 w16;
 475
 476         for (i = 0; i < 3; i++) {
 477                 read_eprom_word(pegasus, i, &w16);
 478                 ((__le16 *) id)[i] = cpu_to_le16p(&w16);
 479         }
 480 }
 481
 482 static void set_ethernet_addr(pegasus_t * pegasus)
 483 {
 484         __u8 node_id[6];
 485
 486         if (pegasus->features & PEGASUS_II) {
 487                 get_registers(pegasus, 0x10, sizeof(node_id), node_id);
 488         } else {
 489                 get_node_id(pegasus, node_id);
 490                 set_registers(pegasus, EthID, sizeof (node_id), node_id);
 491         }
 492         memcpy(pegasus->net->dev_addr, node_id, sizeof (node_id));
 493 }
 494
 495 static inline int reset_mac(pegasus_t * pegasus)
 496 {
 497         __u8 data = 0x8;
 498         int i;
 499
 500         set_register(pegasus, EthCtrl1, data);
 501         for (i = 0; i < REG_TIMEOUT; i++) {
 502                 get_registers(pegasus, EthCtrl1, 1, &data);
 503                 if (~data & 0x08) {
 504                         if (loopback & 1)
 505                                 break;
 506                         if (mii_mode && (pegasus->features & HAS_HOME_PNA))
 507                                 set_register(pegasus, Gpio1, 0x34);
 508                         else
 509                                 set_register(pegasus, Gpio1, 0x26);
 510                         set_register(pegasus, Gpio0, pegasus->features);
 511                         set_register(pegasus, Gpio0, DEFAULT_GPIO_SET);
 512                         break;
 513                 }
 514         }
 515         if (i == REG_TIMEOUT)
 516                 return -ETIMEDOUT;
 517
 518         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
 519             usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
 520                 set_register(pegasus, Gpio0, 0x24);
 521                 set_register(pegasus, Gpio0, 0x26);
 522         }
 523         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_ELCON) {
 524                 __u16 auxmode;
 525                 read_mii_word(pegasus, 3, 0x1b, &auxmode);
 526                 write_mii_word(pegasus, 3, 0x1b, auxmode | 4);
 527         }
 528
 529         return 0;
 530 }
 531
 532 static int enable_net_traffic(struct net_device *dev, struct usb_device *usb)
 533 {
 534         __u16 linkpart;
 535         __u8 data[4];
 536         pegasus_t *pegasus = netdev_priv(dev);
 537         int ret;
 538
 539         read_mii_word(pegasus, pegasus->phy, MII_LPA, &linkpart);
 540         data[0] = 0xc9;
 541         data[1] = 0;
 542         if (linkpart & (ADVERTISE_100FULL | ADVERTISE_10FULL))
 543                 data[1] |= 0x20;        /* set full duplex */
 544         if (linkpart & (ADVERTISE_100FULL | ADVERTISE_100HALF))
 545                 data[1] |= 0x10;        /* set 100 Mbps */
 546         if (mii_mode)
 547                 data[1] = 0;
 548         data[2] = (loopback & 1) ? 0x09 : 0x01;
 549
 550         memcpy(pegasus->eth_regs, data, sizeof (data));
 551         ret = set_registers(pegasus, EthCtrl0, 3, data);
 552
 553         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
 554             usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS2 ||
 555             usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
 556                 u16 auxmode;
 557                 read_mii_word(pegasus, 0, 0x1b, &auxmode);
 558                 write_mii_word(pegasus, 0, 0x1b, auxmode | 4);
 559         }
 560
 561         return ret;
 562 }
 563
 564 static void fill_skb_pool(pegasus_t * pegasus)
 565 {
 566         int i;
 567
 568         for (i = 0; i < RX_SKBS; i++) {
 569                 if (pegasus->rx_pool[i])
 570                         continue;
 571                 pegasus->rx_pool[i] = dev_alloc_skb(PEGASUS_MTU + 2);
 572                 /*
 573                  ** we give up if the allocation fail. the tasklet will be
 574                  ** rescheduled again anyway...
 575                  */
 576                 if (pegasus->rx_pool[i] == NULL)
 577                         return;
 578                 skb_reserve(pegasus->rx_pool[i], 2);
 579         }
 580 }
 581
 582 static void free_skb_pool(pegasus_t * pegasus)
 583 {
 584         int i;
 585
 586         for (i = 0; i < RX_SKBS; i++) {
 587                 if (pegasus->rx_pool[i]) {
 588                         dev_kfree_skb(pegasus->rx_pool[i]);
 589                         pegasus->rx_pool[i] = NULL;
 590                 }
 591         }
 592 }
 593
 594 static inline struct sk_buff *pull_skb(pegasus_t * pegasus)
 595 {
 596         int i;
 597         struct sk_buff *skb;
 598
 599         for (i = 0; i < RX_SKBS; i++) {
 600                 if (likely(pegasus->rx_pool[i] != NULL)) {
 601                         skb = pegasus->rx_pool[i];
 602                         pegasus->rx_pool[i] = NULL;
 603                         return skb;
 604                 }
 605         }
 606         return NULL;
 607 }
 608
 609 static void read_bulk_callback(struct urb *urb)
 610 {
 611         pegasus_t *pegasus = urb->context;
 612         struct net_device *net;
 613         int rx_status, count = urb->actual_length;
 614         u8 *buf = urb->transfer_buffer;
 615         __u16 pkt_len;
 616
 617         if (!pegasus)
 618                 return;
 619
 620         net = pegasus->net;
 621         if (!netif_device_present(net) || !netif_running(net))
 622                 return;
 623
 624         switch (urb->status) {
 625         case 0:
 626                 break;
 627         case -ETIME:
 628                 if (netif_msg_rx_err(pegasus))
 629                         pr_debug("%s: reset MAC\n", net->name);
 630                 pegasus->flags &= ~PEGASUS_RX_BUSY;
 631                 break;
 632         case -EPIPE:            /* stall, or disconnect from TT */
 633                 /* FIXME schedule work to clear the halt */
 634                 if (netif_msg_rx_err(pegasus))
 635                         printk(KERN_WARNING "%s: no rx stall recovery\n",
 636                                         net->name);
 637                 return;
 638         case -ENOENT:
 639         case -ECONNRESET:
 640         case -ESHUTDOWN:
 641                 if (netif_msg_ifdown(pegasus))
 642                         pr_debug("%s: rx unlink, %d\n", net->name, urb->status);
 643                 return;
 644         default:
 645                 if (netif_msg_rx_err(pegasus))
 646                         pr_debug("%s: RX status %d\n", net->name, urb->status);
 647                 goto goon;
 648         }
 649
 650         if (!count || count < 4)
 651                 goto goon;
 652
 653         rx_status = buf[count - 2];
 654         if (rx_status & 0x1e) {
 655                 if (netif_msg_rx_err(pegasus))
 656                         pr_debug("%s: RX packet error %x\n",
 657                                         net->name, rx_status);
 658                 pegasus->stats.rx_errors++;
 659                 if (rx_status & 0x06)   // long or runt
 660                         pegasus->stats.rx_length_errors++;
 661                 if (rx_status & 0x08)
 662                         pegasus->stats.rx_crc_errors++;
 663                 if (rx_status & 0x10)   // extra bits
 664                         pegasus->stats.rx_frame_errors++;
 665                 goto goon;
 666         }
 667         if (pegasus->chip == 0x8513) {
 668                 pkt_len = le32_to_cpu(*(__le32 *)urb->transfer_buffer);
 669                 pkt_len &= 0x0fff;
 670                 pegasus->rx_skb->data += 2;
 671         } else {
 672                 pkt_len = buf[count - 3] << 8;
 673                 pkt_len += buf[count - 4];
 674                 pkt_len &= 0xfff;
 675                 pkt_len -= 8;
 676         }
 677
 678         /*
 679          * If the packet is unreasonably long, quietly drop it rather than
 680          * kernel panicing by calling skb_put.
 681          */
 682         if (pkt_len > PEGASUS_MTU)
 683                 goto goon;
 684
 685         /*
 686          * at this point we are sure pegasus->rx_skb != NULL
 687          * so we go ahead and pass up the packet.
 688          */
 689         skb_put(pegasus->rx_skb, pkt_len);
 690         pegasus->rx_skb->protocol = eth_type_trans(pegasus->rx_skb, net);
 691         netif_rx(pegasus->rx_skb);
 692         pegasus->stats.rx_packets++;
 693         pegasus->stats.rx_bytes += pkt_len;
 694
 695         if (pegasus->flags & PEGASUS_UNPLUG)
 696                 return;
 697
 698         spin_lock(&pegasus->rx_pool_lock);
 699         pegasus->rx_skb = pull_skb(pegasus);
 700         spin_unlock(&pegasus->rx_pool_lock);
 701
 702         if (pegasus->rx_skb == NULL)
 703                 goto tl_sched;
 704 goon:
 705         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
 706                           usb_rcvbulkpipe(pegasus->usb, 1),
 707                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
 708                           read_bulk_callback, pegasus);
 709         rx_status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);
 710         if (rx_status == -ENODEV)
 711                 netif_device_detach(pegasus->net);
 712         else if (rx_status) {
 713                 pegasus->flags |= PEGASUS_RX_URB_FAIL;
 714                 goto tl_sched;
 715         } else {
 716                 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
 717         }
 718
 719         return;
 720
 721 tl_sched:
 722         tasklet_schedule(&pegasus->rx_tl);
 723 }
 724
 725 static void rx_fixup(unsigned long data)
 726 {
 727         pegasus_t *pegasus;
 728         unsigned long flags;
 729         int status;
 730
 731         pegasus = (pegasus_t *) data;
 732         if (pegasus->flags & PEGASUS_UNPLUG)
 733                 return;
 734
 735         spin_lock_irqsave(&pegasus->rx_pool_lock, flags);
 736         fill_skb_pool(pegasus);
 737         if (pegasus->flags & PEGASUS_RX_URB_FAIL)
 738                 if (pegasus->rx_skb)
 739                         goto try_again;
 740         if (pegasus->rx_skb == NULL) {
 741                 pegasus->rx_skb = pull_skb(pegasus);
 742         }
 743         if (pegasus->rx_skb == NULL) {
 744                 if (netif_msg_rx_err(pegasus))
 745                         printk(KERN_WARNING "%s: low on memory\n",
 746                                         pegasus->net->name);
 747                 tasklet_schedule(&pegasus->rx_tl);
 748                 goto done;
 749         }
 750         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
 751                           usb_rcvbulkpipe(pegasus->usb, 1),
 752                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
 753                           read_bulk_callback, pegasus);
 754 try_again:
 755         status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);
 756         if (status == -ENODEV)
 757                 netif_device_detach(pegasus->net);
 758         else if (status) {
 759                 pegasus->flags |= PEGASUS_RX_URB_FAIL;
 760                 tasklet_schedule(&pegasus->rx_tl);
 761         } else {
 762                 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
 763         }
 764 done:
 765         spin_unlock_irqrestore(&pegasus->rx_pool_lock, flags);
 766 }
 767
 768 static void write_bulk_callback(struct urb *urb)
 769 {
 770         pegasus_t *pegasus = urb->context;
 771         struct net_device *net = pegasus->net;
 772
 773         if (!pegasus)
 774                 return;
 775
 776         if (!netif_device_present(net) || !netif_running(net))
 777                 return;
 778
 779         switch (urb->status) {
 780         case -EPIPE:
 781                 /* FIXME schedule_work() to clear the tx halt */
 782                 netif_stop_queue(net);
 783                 if (netif_msg_tx_err(pegasus))
 784                         printk(KERN_WARNING "%s: no tx stall recovery\n",
 785                                         net->name);
 786                 return;
 787         case -ENOENT:
 788         case -ECONNRESET:
 789         case -ESHUTDOWN:
 790                 if (netif_msg_ifdown(pegasus))
 791                         pr_debug("%s: tx unlink, %d\n", net->name, urb->status);
 792                 return;
 793         default:
 794                 if (netif_msg_tx_err(pegasus))
 795                         pr_info("%s: TX status %d\n", net->name, urb->status);
 796                 /* FALL THROUGH */
 797         case 0:
 798                 break;
 799         }
 800
 801         net->trans_start = jiffies;
 802         netif_wake_queue(net);
 803 }
 804
 805 static void intr_callback(struct urb *urb)
 806 {
 807         pegasus_t *pegasus = urb->context;
 808         struct net_device *net;
 809         int status;
 810
 811         if (!pegasus)
 812                 return;
 813         net = pegasus->net;
 814
 815         switch (urb->status) {
 816         case 0:
 817                 break;
 818         case -ECONNRESET:       /* unlink */
 819         case -ENOENT:
 820         case -ESHUTDOWN:
 821                 return;
 822         default:
 823                 /* some Pegasus-I products report LOTS of data
 824                  * toggle errors... avoid log spamming
 825                  */
 826                 if (netif_msg_timer(pegasus))
 827                         pr_debug("%s: intr status %d\n", net->name,
 828                                         urb->status);
 829         }
 830
 831         if (urb->actual_length >= 6) {
 832                 u8      * d = urb->transfer_buffer;
 833
 834                 /* byte 0 == tx_status1, reg 2B */
 835                 if (d[0] & (TX_UNDERRUN|EXCESSIVE_COL
 836                                         |LATE_COL|JABBER_TIMEOUT)) {
 837                         pegasus->stats.tx_errors++;
 838                         if (d[0] & TX_UNDERRUN)
 839                                 pegasus->stats.tx_fifo_errors++;
 840                         if (d[0] & (EXCESSIVE_COL | JABBER_TIMEOUT))
 841                                 pegasus->stats.tx_aborted_errors++;
 842                         if (d[0] & LATE_COL)
 843                                 pegasus->stats.tx_window_errors++;
 844                 }
 845
 846                 /* d[5].LINK_STATUS lies on some adapters.
 847                  * d[0].NO_CARRIER kicks in only with failed TX.
 848                  * ... so monitoring with MII may be safest.
 849                  */
 850
 851                 /* bytes 3-4 == rx_lostpkt, reg 2E/2F */
 852                 pegasus->stats.rx_missed_errors += ((d[3] & 0x7f) << 8) | d[4];
 853         }
 854
 855         status = usb_submit_urb(urb, GFP_ATOMIC);
 856         if (status == -ENODEV)
 857                 netif_device_detach(pegasus->net);
 858         if (status && netif_msg_timer(pegasus))
 859                 printk(KERN_ERR "%s: can't resubmit interrupt urb, %d\n",
 860                                 net->name, status);
 861 }
 862
 863 static void pegasus_tx_timeout(struct net_device *net)
 864 {
 865         pegasus_t *pegasus = netdev_priv(net);
 866         if (netif_msg_timer(pegasus))
 867                 printk(KERN_WARNING "%s: tx timeout\n", net->name);
 868         usb_unlink_urb(pegasus->tx_urb);
 869         pegasus->stats.tx_errors++;
 870 }
 871
 872 static int pegasus_start_xmit(struct sk_buff *skb, struct net_device *net)
 873 {
 874         pegasus_t *pegasus = netdev_priv(net);
 875         int count = ((skb->len + 2) & 0x3f) ? skb->len + 2 : skb->len + 3;
 876         int res;
 877         __u16 l16 = skb->len;
 878
 879         netif_stop_queue(net);
 880
 881         ((__le16 *) pegasus->tx_buff)[0] = cpu_to_le16(l16);
 882         skb_copy_from_linear_data(skb, pegasus->tx_buff + 2, skb->len);
 883         usb_fill_bulk_urb(pegasus->tx_urb, pegasus->usb,
 884                           usb_sndbulkpipe(pegasus->usb, 2),
 885                           pegasus->tx_buff, count,
 886                           write_bulk_callback, pegasus);
 887         if ((res = usb_submit_urb(pegasus->tx_urb, GFP_ATOMIC))) {
 888                 if (netif_msg_tx_err(pegasus))
 889                         printk(KERN_WARNING "%s: fail tx, %d\n",
 890                                         net->name, res);
 891                 switch (res) {
 892                 case -EPIPE:            /* stall, or disconnect from TT */
 893                         /* cleanup should already have been scheduled */
 894                         break;
 895                 case -ENODEV:           /* disconnect() upcoming */
 896                         netif_device_detach(pegasus->net);
 897                         break;
 898                 default:
 899                         pegasus->stats.tx_errors++;
 900                         netif_start_queue(net);
 901                 }
 902         } else {
 903                 pegasus->stats.tx_packets++;
 904                 pegasus->stats.tx_bytes += skb->len;
 905                 net->trans_start = jiffies;
 906         }
 907         dev_kfree_skb(skb);
 908
 909         return 0;
 910 }
 911
 912 static struct net_device_stats *pegasus_netdev_stats(struct net_device *dev)
 913 {
 914         return &((pegasus_t *) netdev_priv(dev))->stats;
 915 }
 916
 917 static inline void disable_net_traffic(pegasus_t * pegasus)
 918 {
 919         int tmp = 0;
 920
 921         set_registers(pegasus, EthCtrl0, 2, &tmp);
 922 }
 923
 924 static inline void get_interrupt_interval(pegasus_t * pegasus)
 925 {
 926         __u8 data[2];
 927
 928         read_eprom_word(pegasus, 4, (__u16 *) data);
 929         if (pegasus->usb->speed != USB_SPEED_HIGH) {
 930                 if (data[1] < 0x80) {
 931                         if (netif_msg_timer(pegasus))
 932                                 dev_info(&pegasus->intf->dev, "intr interval "
 933                                         "changed from %ums to %ums\n",
 934                                         data[1], 0x80);
 935                         data[1] = 0x80;
 936 #ifdef PEGASUS_WRITE_EEPROM
 937                         write_eprom_word(pegasus, 4, *(__u16 *) data);
 938 #endif
 939                 }
 940         }
 941         pegasus->intr_interval = data[1];
 942 }
 943
 944 static void set_carrier(struct net_device *net)
 945 {
 946         pegasus_t *pegasus = netdev_priv(net);
 947         u16 tmp;
 948
 949         if (read_mii_word(pegasus, pegasus->phy, MII_BMSR, &tmp))
 950                 return;
 951
 952         if (tmp & BMSR_LSTATUS)
 953                 netif_carrier_on(net);
 954         else
 955                 netif_carrier_off(net);
 956 }
 957
 958 static void free_all_urbs(pegasus_t * pegasus)
 959 {
 960         usb_free_urb(pegasus->intr_urb);
 961         usb_free_urb(pegasus->tx_urb);
 962         usb_free_urb(pegasus->rx_urb);
 963         usb_free_urb(pegasus->ctrl_urb);
 964 }
 965
 966 static void unlink_all_urbs(pegasus_t * pegasus)
 967 {
 968         usb_kill_urb(pegasus->intr_urb);
 969         usb_kill_urb(pegasus->tx_urb);
 970         usb_kill_urb(pegasus->rx_urb);
 971         usb_kill_urb(pegasus->ctrl_urb);
 972 }
 973
 974 static int alloc_urbs(pegasus_t * pegasus)
 975 {
 976         pegasus->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
 977         if (!pegasus->ctrl_urb) {
 978                 return 0;
 979         }
 980         pegasus->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 981         if (!pegasus->rx_urb) {
 982                 usb_free_urb(pegasus->ctrl_urb);
 983                 return 0;
 984         }
 985         pegasus->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 986         if (!pegasus->tx_urb) {
 987                 usb_free_urb(pegasus->rx_urb);
 988                 usb_free_urb(pegasus->ctrl_urb);
 989                 return 0;
 990         }
 991         pegasus->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
 992         if (!pegasus->intr_urb) {
 993                 usb_free_urb(pegasus->tx_urb);
 994                 usb_free_urb(pegasus->rx_urb);
 995                 usb_free_urb(pegasus->ctrl_urb);
 996                 return 0;
 997         }
 998
 999         return 1;
1000 }
1001
1002 static int pegasus_open(struct net_device *net)
1003 {
1004         pegasus_t *pegasus = netdev_priv(net);
1005         int res;
1006
1007         if (pegasus->rx_skb == NULL)
1008                 pegasus->rx_skb = pull_skb(pegasus);
1009         /*
1010          ** Note: no point to free the pool.  it is empty :-)
1011          */
1012         if (!pegasus->rx_skb)
1013                 return -ENOMEM;
1014
1015         res = set_registers(pegasus, EthID, 6, net->dev_addr);
1016
1017         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
1018                           usb_rcvbulkpipe(pegasus->usb, 1),
1019                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
1020                           read_bulk_callback, pegasus);
1021         if ((res = usb_submit_urb(pegasus->rx_urb, GFP_KERNEL))) {
1022                 if (res == -ENODEV)
1023                         netif_device_detach(pegasus->net);
1024                 if (netif_msg_ifup(pegasus))
1025                         pr_debug("%s: failed rx_urb, %d", net->name, res);
1026                 goto exit;
1027         }
1028
1029         usb_fill_int_urb(pegasus->intr_urb, pegasus->usb,
1030                          usb_rcvintpipe(pegasus->usb, 3),
1031                          pegasus->intr_buff, sizeof (pegasus->intr_buff),
1032                          intr_callback, pegasus, pegasus->intr_interval);
1033         if ((res = usb_submit_urb(pegasus->intr_urb, GFP_KERNEL))) {
1034                 if (res == -ENODEV)
1035                         netif_device_detach(pegasus->net);
1036                 if (netif_msg_ifup(pegasus))
1037                         pr_debug("%s: failed intr_urb, %d\n", net->name, res);
1038                 usb_kill_urb(pegasus->rx_urb);
1039                 goto exit;
1040         }
1041         if ((res = enable_net_traffic(net, pegasus->usb))) {
1042                 if (netif_msg_ifup(pegasus))
1043                         pr_debug("%s: can't enable_net_traffic() - %d\n",
1044                                         net->name, res);
1045                 res = -EIO;
1046                 usb_kill_urb(pegasus->rx_urb);
1047                 usb_kill_urb(pegasus->intr_urb);
1048                 free_skb_pool(pegasus);
1049                 goto exit;
1050         }
1051         set_carrier(net);
1052         netif_start_queue(net);
1053         if (netif_msg_ifup(pegasus))
1054                 pr_debug("%s: open\n", net->name);
1055         res = 0;
1056 exit:
1057         return res;
1058 }
1059
1060 static int pegasus_close(struct net_device *net)
1061 {
1062         pegasus_t *pegasus = netdev_priv(net);
1063
1064         netif_stop_queue(net);
1065         if (!(pegasus->flags & PEGASUS_UNPLUG))
1066                 disable_net_traffic(pegasus);
1067         tasklet_kill(&pegasus->rx_tl);
1068         unlink_all_urbs(pegasus);
1069
1070         return 0;
1071 }
1072
1073 static void pegasus_get_drvinfo(struct net_device *dev,
1074                                 struct ethtool_drvinfo *info)
1075 {
1076         pegasus_t *pegasus = netdev_priv(dev);
1077         strncpy(info->driver, driver_name, sizeof (info->driver) - 1);
1078         strncpy(info->version, DRIVER_VERSION, sizeof (info->version) - 1);
1079         usb_make_path(pegasus->usb, info->bus_info, sizeof (info->bus_info));
1080 }
1081
1082 /* also handles three patterns of some kind in hardware */
1083 #define WOL_SUPPORTED   (WAKE_MAGIC|WAKE_PHY)
1084
1085 static void
1086 pegasus_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1087 {
1088         pegasus_t       *pegasus = netdev_priv(dev);
1089
1090         wol->supported = WAKE_MAGIC | WAKE_PHY;
1091         wol->wolopts = pegasus->wolopts;
1092 }
1093
1094 static int
1095 pegasus_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1096 {
1097         pegasus_t       *pegasus = netdev_priv(dev);
1098         u8              reg78 = 0x04;
1099
1100         if (wol->wolopts & ~WOL_SUPPORTED)
1101                 return -EINVAL;
1102
1103         if (wol->wolopts & WAKE_MAGIC)
1104                 reg78 |= 0x80;
1105         if (wol->wolopts & WAKE_PHY)
1106                 reg78 |= 0x40;
1107         /* FIXME this 0x10 bit still needs to get set in the chip... */
1108         if (wol->wolopts)
1109                 pegasus->eth_regs[0] |= 0x10;
1110         else
1111                 pegasus->eth_regs[0] &= ~0x10;
1112         pegasus->wolopts = wol->wolopts;
1113         return set_register(pegasus, WakeupControl, reg78);
1114 }
1115
1116 static inline void pegasus_reset_wol(struct net_device *dev)
1117 {
1118         struct ethtool_wolinfo wol;
1119
1120         memset(&wol, 0, sizeof wol);
1121         (void) pegasus_set_wol(dev, &wol);
1122 }
1123
1124 static int
1125 pegasus_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1126 {
1127         pegasus_t *pegasus;
1128
1129         if (in_atomic())
1130                 return 0;
1131
1132         pegasus = netdev_priv(dev);
1133         mii_ethtool_gset(&pegasus->mii, ecmd);
1134
1135         return 0;
1136 }
1137
1138 static int
1139 pegasus_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1140 {
1141         pegasus_t *pegasus = netdev_priv(dev);
1142         return mii_ethtool_sset(&pegasus->mii, ecmd);
1143 }
1144
1145 static int pegasus_nway_reset(struct net_device *dev)
1146 {
1147         pegasus_t *pegasus = netdev_priv(dev);
1148         return mii_nway_restart(&pegasus->mii);
1149 }
1150
1151 static u32 pegasus_get_link(struct net_device *dev)
1152 {
1153         pegasus_t *pegasus = netdev_priv(dev);
1154         return mii_link_ok(&pegasus->mii);
1155 }
1156
1157 static u32 pegasus_get_msglevel(struct net_device *dev)
1158 {
1159         pegasus_t *pegasus = netdev_priv(dev);
1160         return pegasus->msg_enable;
1161 }
1162
1163 static void pegasus_set_msglevel(struct net_device *dev, u32 v)
1164 {
1165         pegasus_t *pegasus = netdev_priv(dev);
1166         pegasus->msg_enable = v;
1167 }
1168
1169 static struct ethtool_ops ops = {
1170         .get_drvinfo = pegasus_get_drvinfo,
1171         .get_settings = pegasus_get_settings,
1172         .set_settings = pegasus_set_settings,
1173         .nway_reset = pegasus_nway_reset,
1174         .get_link = pegasus_get_link,
1175         .get_msglevel = pegasus_get_msglevel,
1176         .set_msglevel = pegasus_set_msglevel,
1177         .get_wol = pegasus_get_wol,
1178         .set_wol = pegasus_set_wol,
1179 };
1180
1181 static int pegasus_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
1182 {
1183         __u16 *data = (__u16 *) & rq->ifr_ifru;
1184         pegasus_t *pegasus = netdev_priv(net);
1185         int res;
1186
1187         switch (cmd) {
1188         case SIOCDEVPRIVATE:
1189                 data[0] = pegasus->phy;
1190         case SIOCDEVPRIVATE + 1:
1191                 read_mii_word(pegasus, data[0], data[1] & 0x1f, &data[3]);
1192                 res = 0;
1193                 break;
1194         case SIOCDEVPRIVATE + 2:
1195                 if (!capable(CAP_NET_ADMIN))
1196                         return -EPERM;
1197                 write_mii_word(pegasus, pegasus->phy, data[1] & 0x1f, data[2]);
1198                 res = 0;
1199                 break;
1200         default:
1201                 res = -EOPNOTSUPP;
1202         }
1203         return res;
1204 }
1205
1206 static void pegasus_set_multicast(struct net_device *net)
1207 {
1208         pegasus_t *pegasus = netdev_priv(net);
1209
1210         if (net->flags & IFF_PROMISC) {
1211                 pegasus->eth_regs[EthCtrl2] |= RX_PROMISCUOUS;
1212                 if (netif_msg_link(pegasus))
1213                         pr_info("%s: Promiscuous mode enabled.\n", net->name);
1214         } else if (net->mc_count ||
1215                    (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_info("%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->flags |= ETH_REGS_CHANGE;
1226         ctrl_callback(pegasus->ctrl_urb);
1227 }
1228
1229 static __u8 mii_phy_probe(pegasus_t * pegasus)
1230 {
1231         int i;
1232         __u16 tmp;
1233
1234         for (i = 0; i < 32; i++) {
1235                 read_mii_word(pegasus, i, MII_BMSR, &tmp);
1236                 if (tmp == 0 || tmp == 0xffff || (tmp & BMSR_MEDIA) == 0)
1237                         continue;
1238                 else
1239                         return i;
1240         }
1241
1242         return 0xff;
1243 }
1244
1245 static inline void setup_pegasus_II(pegasus_t * pegasus)
1246 {
1247         __u8 data = 0xa5;
1248
1249         set_register(pegasus, Reg1d, 0);
1250         set_register(pegasus, Reg7b, 1);
1251         mdelay(100);
1252         if ((pegasus->features & HAS_HOME_PNA) && mii_mode)
1253                 set_register(pegasus, Reg7b, 0);
1254         else
1255                 set_register(pegasus, Reg7b, 2);
1256
1257         set_register(pegasus, 0x83, data);
1258         get_registers(pegasus, 0x83, 1, &data);
1259
1260         if (data == 0xa5) {
1261                 pegasus->chip = 0x8513;
1262         } else {
1263                 pegasus->chip = 0;
1264         }
1265
1266         set_register(pegasus, 0x80, 0xc0);
1267         set_register(pegasus, 0x83, 0xff);
1268         set_register(pegasus, 0x84, 0x01);
1269
1270         if (pegasus->features & HAS_HOME_PNA && mii_mode)
1271                 set_register(pegasus, Reg81, 6);
1272         else
1273                 set_register(pegasus, Reg81, 2);
1274 }
1275
1276
1277 static struct workqueue_struct *pegasus_workqueue = NULL;
1278 #define CARRIER_CHECK_DELAY (2 * HZ)
1279
1280 static void check_carrier(struct work_struct *work)
1281 {
1282         pegasus_t *pegasus = container_of(work, pegasus_t, carrier_check.work);
1283         set_carrier(pegasus->net);
1284         if (!(pegasus->flags & PEGASUS_UNPLUG)) {
1285                 queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1286                         CARRIER_CHECK_DELAY);
1287         }
1288 }
1289
1290 static int pegasus_probe(struct usb_interface *intf,
1291                          const struct usb_device_id *id)
1292 {
1293         struct usb_device *dev = interface_to_usbdev(intf);
1294         struct net_device *net;
1295         pegasus_t *pegasus;
1296         int dev_index = id - pegasus_ids;
1297         int res = -ENOMEM;
1298
1299         usb_get_dev(dev);
1300         net = alloc_etherdev(sizeof(struct pegasus));
1301         if (!net) {
1302                 dev_err(&intf->dev, "can't allocate %s\n", "device");
1303                 goto out;
1304         }
1305
1306         pegasus = netdev_priv(net);
1307         memset(pegasus, 0, sizeof (struct pegasus));
1308         pegasus->dev_index = dev_index;
1309         init_waitqueue_head(&pegasus->ctrl_wait);
1310
1311         if (!alloc_urbs(pegasus)) {
1312                 dev_err(&intf->dev, "can't allocate %s\n", "urbs");
1313                 goto out1;
1314         }
1315
1316         tasklet_init(&pegasus->rx_tl, rx_fixup, (unsigned long) pegasus);
1317
1318         INIT_DELAYED_WORK(&pegasus->carrier_check, check_carrier);
1319
1320         pegasus->intf = intf;
1321         pegasus->usb = dev;
1322         pegasus->net = net;
1323         SET_MODULE_OWNER(net);
1324         net->open = pegasus_open;
1325         net->stop = pegasus_close;
1326         net->watchdog_timeo = PEGASUS_TX_TIMEOUT;
1327         net->tx_timeout = pegasus_tx_timeout;
1328         net->do_ioctl = pegasus_ioctl;
1329         net->hard_start_xmit = pegasus_start_xmit;
1330         net->set_multicast_list = pegasus_set_multicast;
1331         net->get_stats = pegasus_netdev_stats;
1332         SET_ETHTOOL_OPS(net, &ops);
1333         pegasus->mii.dev = net;
1334         pegasus->mii.mdio_read = mdio_read;
1335         pegasus->mii.mdio_write = mdio_write;
1336         pegasus->mii.phy_id_mask = 0x1f;
1337         pegasus->mii.reg_num_mask = 0x1f;
1338         spin_lock_init(&pegasus->rx_pool_lock);
1339         pegasus->msg_enable = netif_msg_init (msg_level, NETIF_MSG_DRV
1340                                 | NETIF_MSG_PROBE | NETIF_MSG_LINK);
1341
1342         pegasus->features = usb_dev_id[dev_index].private;
1343         get_interrupt_interval(pegasus);
1344         if (reset_mac(pegasus)) {
1345                 dev_err(&intf->dev, "can't reset MAC\n");
1346                 res = -EIO;
1347                 goto out2;
1348         }
1349         set_ethernet_addr(pegasus);
1350         fill_skb_pool(pegasus);
1351         if (pegasus->features & PEGASUS_II) {
1352                 dev_info(&intf->dev, "setup Pegasus II specific registers\n");
1353                 setup_pegasus_II(pegasus);
1354         }
1355         pegasus->phy = mii_phy_probe(pegasus);
1356         if (pegasus->phy == 0xff) {
1357                 dev_warn(&intf->dev, "can't locate MII phy, using default\n");
1358                 pegasus->phy = 1;
1359         }
1360         pegasus->mii.phy_id = pegasus->phy;
1361         usb_set_intfdata(intf, pegasus);
1362         SET_NETDEV_DEV(net, &intf->dev);
1363         pegasus_reset_wol(net);
1364         res = register_netdev(net);
1365         if (res)
1366                 goto out3;
1367         queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1368                                 CARRIER_CHECK_DELAY);
1369
1370         dev_info(&intf->dev, "%s, %s, %02x:%02x:%02x:%02x:%02x:%02x\n",
1371                 net->name,
1372                 usb_dev_id[dev_index].name,
1373                 net->dev_addr [0], net->dev_addr [1],
1374                 net->dev_addr [2], net->dev_addr [3],
1375                 net->dev_addr [4], net->dev_addr [5]);
1376         return 0;
1377
1378 out3:
1379         usb_set_intfdata(intf, NULL);
1380         free_skb_pool(pegasus);
1381 out2:
1382         free_all_urbs(pegasus);
1383 out1:
1384         free_netdev(net);
1385 out:
1386         usb_put_dev(dev);
1387         return res;
1388 }
1389
1390 static void pegasus_disconnect(struct usb_interface *intf)
1391 {
1392         struct pegasus *pegasus = usb_get_intfdata(intf);
1393
1394         usb_set_intfdata(intf, NULL);
1395         if (!pegasus) {
1396                 dev_dbg(&intf->dev, "unregistering non-bound device?\n");
1397                 return;
1398         }
1399
1400         pegasus->flags |= PEGASUS_UNPLUG;
1401         cancel_delayed_work(&pegasus->carrier_check);
1402         unregister_netdev(pegasus->net);
1403         usb_put_dev(interface_to_usbdev(intf));
1404         unlink_all_urbs(pegasus);
1405         free_all_urbs(pegasus);
1406         free_skb_pool(pegasus);
1407         if (pegasus->rx_skb != NULL) {
1408                 dev_kfree_skb(pegasus->rx_skb);
1409                 pegasus->rx_skb = NULL;
1410         }
1411         free_netdev(pegasus->net);
1412 }
1413
1414 static int pegasus_suspend (struct usb_interface *intf, pm_message_t message)
1415 {
1416         struct pegasus *pegasus = usb_get_intfdata(intf);
1417
1418         netif_device_detach (pegasus->net);
1419         cancel_delayed_work(&pegasus->carrier_check);
1420         if (netif_running(pegasus->net)) {
1421                 usb_kill_urb(pegasus->rx_urb);
1422                 usb_kill_urb(pegasus->intr_urb);
1423         }
1424         return 0;
1425 }
1426
1427 static int pegasus_resume (struct usb_interface *intf)
1428 {
1429         struct pegasus *pegasus = usb_get_intfdata(intf);
1430
1431         netif_device_attach (pegasus->net);
1432         if (netif_running(pegasus->net)) {
1433                 pegasus->rx_urb->status = 0;
1434                 pegasus->rx_urb->actual_length = 0;
1435                 read_bulk_callback(pegasus->rx_urb);
1436
1437                 pegasus->intr_urb->status = 0;
1438                 pegasus->intr_urb->actual_length = 0;
1439                 intr_callback(pegasus->intr_urb);
1440         }
1441         queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1442                                 CARRIER_CHECK_DELAY);
1443         return 0;
1444 }
1445
1446 static struct usb_driver pegasus_driver = {
1447         .name = driver_name,
1448         .probe = pegasus_probe,
1449         .disconnect = pegasus_disconnect,
1450         .id_table = pegasus_ids,
1451         .suspend = pegasus_suspend,
1452         .resume = pegasus_resume,
1453 };
1454
1455 static void parse_id(char *id)
1456 {
1457         unsigned int vendor_id=0, device_id=0, flags=0, i=0;
1458         char *token, *name=NULL;
1459
1460         if ((token = strsep(&id, ":")) != NULL)
1461                 name = token;
1462         /* name now points to a null terminated string*/
1463         if ((token = strsep(&id, ":")) != NULL)
1464                 vendor_id = simple_strtoul(token, NULL, 16);
1465         if ((token = strsep(&id, ":")) != NULL)
1466                 device_id = simple_strtoul(token, NULL, 16);
1467         flags = simple_strtoul(id, NULL, 16);
1468         pr_info("%s: new device %s, vendor ID 0x%04x, device ID 0x%04x, flags: 0x%x\n",
1469                 driver_name, name, vendor_id, device_id, flags);
1470
1471         if (vendor_id > 0x10000 || vendor_id == 0)
1472                 return;
1473         if (device_id > 0x10000 || device_id == 0)
1474                 return;
1475
1476         for (i=0; usb_dev_id[i].name; i++);
1477         usb_dev_id[i].name = name;
1478         usb_dev_id[i].vendor = vendor_id;
1479         usb_dev_id[i].device = device_id;
1480         usb_dev_id[i].private = flags;
1481         pegasus_ids[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
1482         pegasus_ids[i].idVendor = vendor_id;
1483         pegasus_ids[i].idProduct = device_id;
1484 }
1485
1486 static int __init pegasus_init(void)
1487 {
1488         pr_info("%s: %s, " DRIVER_DESC "\n", driver_name, DRIVER_VERSION);
1489         if (devid)
1490                 parse_id(devid);
1491         pegasus_workqueue = create_singlethread_workqueue("pegasus");
1492         if (!pegasus_workqueue)
1493                 return -ENOMEM;
1494         return usb_register(&pegasus_driver);
1495 }
1496
1497 static void __exit pegasus_exit(void)
1498 {
1499         destroy_workqueue(pegasus_workqueue);
1500         usb_deregister(&pegasus_driver);
1501 }
1502
1503 module_init(pegasus_init);
1504 module_exit(pegasus_exit);