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                 pegasus->rx_pool[i]->dev = pegasus->net;
 579                 skb_reserve(pegasus->rx_pool[i], 2);
 580         }
 581 }
 582
 583 static void free_skb_pool(pegasus_t * pegasus)
 584 {
 585         int i;
 586
 587         for (i = 0; i < RX_SKBS; i++) {
 588                 if (pegasus->rx_pool[i]) {
 589                         dev_kfree_skb(pegasus->rx_pool[i]);
 590                         pegasus->rx_pool[i] = NULL;
 591                 }
 592         }
 593 }
 594
 595 static inline struct sk_buff *pull_skb(pegasus_t * pegasus)
 596 {
 597         int i;
 598         struct sk_buff *skb;
 599
 600         for (i = 0; i < RX_SKBS; i++) {
 601                 if (likely(pegasus->rx_pool[i] != NULL)) {
 602                         skb = pegasus->rx_pool[i];
 603                         pegasus->rx_pool[i] = NULL;
 604                         return skb;
 605                 }
 606         }
 607         return NULL;
 608 }
 609
 610 static void read_bulk_callback(struct urb *urb)
 611 {
 612         pegasus_t *pegasus = urb->context;
 613         struct net_device *net;
 614         int rx_status, count = urb->actual_length;
 615         u8 *buf = urb->transfer_buffer;
 616         __u16 pkt_len;
 617
 618         if (!pegasus)
 619                 return;
 620
 621         net = pegasus->net;
 622         if (!netif_device_present(net) || !netif_running(net))
 623                 return;
 624
 625         switch (urb->status) {
 626         case 0:
 627                 break;
 628         case -ETIME:
 629                 if (netif_msg_rx_err(pegasus))
 630                         pr_debug("%s: reset MAC\n", net->name);
 631                 pegasus->flags &= ~PEGASUS_RX_BUSY;
 632                 break;
 633         case -EPIPE:            /* stall, or disconnect from TT */
 634                 /* FIXME schedule work to clear the halt */
 635                 if (netif_msg_rx_err(pegasus))
 636                         printk(KERN_WARNING "%s: no rx stall recovery\n",
 637                                         net->name);
 638                 return;
 639         case -ENOENT:
 640         case -ECONNRESET:
 641         case -ESHUTDOWN:
 642                 if (netif_msg_ifdown(pegasus))
 643                         pr_debug("%s: rx unlink, %d\n", net->name, urb->status);
 644                 return;
 645         default:
 646                 if (netif_msg_rx_err(pegasus))
 647                         pr_debug("%s: RX status %d\n", net->name, urb->status);
 648                 goto goon;
 649         }
 650
 651         if (!count || count < 4)
 652                 goto goon;
 653
 654         rx_status = buf[count - 2];
 655         if (rx_status & 0x1e) {
 656                 if (netif_msg_rx_err(pegasus))
 657                         pr_debug("%s: RX packet error %x\n",
 658                                         net->name, rx_status);
 659                 pegasus->stats.rx_errors++;
 660                 if (rx_status & 0x06)   // long or runt
 661                         pegasus->stats.rx_length_errors++;
 662                 if (rx_status & 0x08)
 663                         pegasus->stats.rx_crc_errors++;
 664                 if (rx_status & 0x10)   // extra bits
 665                         pegasus->stats.rx_frame_errors++;
 666                 goto goon;
 667         }
 668         if (pegasus->chip == 0x8513) {
 669                 pkt_len = le32_to_cpu(*(__le32 *)urb->transfer_buffer);
 670                 pkt_len &= 0x0fff;
 671                 pegasus->rx_skb->data += 2;
 672         } else {
 673                 pkt_len = buf[count - 3] << 8;
 674                 pkt_len += buf[count - 4];
 675                 pkt_len &= 0xfff;
 676                 pkt_len -= 8;
 677         }
 678
 679         /*
 680          * If the packet is unreasonably long, quietly drop it rather than
 681          * kernel panicing by calling skb_put.
 682          */
 683         if (pkt_len > PEGASUS_MTU)
 684                 goto goon;
 685
 686         /*
 687          * at this point we are sure pegasus->rx_skb != NULL
 688          * so we go ahead and pass up the packet.
 689          */
 690         skb_put(pegasus->rx_skb, pkt_len);
 691         pegasus->rx_skb->protocol = eth_type_trans(pegasus->rx_skb, net);
 692         netif_rx(pegasus->rx_skb);
 693         pegasus->stats.rx_packets++;
 694         pegasus->stats.rx_bytes += pkt_len;
 695
 696         if (pegasus->flags & PEGASUS_UNPLUG)
 697                 return;
 698
 699         spin_lock(&pegasus->rx_pool_lock);
 700         pegasus->rx_skb = pull_skb(pegasus);
 701         spin_unlock(&pegasus->rx_pool_lock);
 702
 703         if (pegasus->rx_skb == NULL)
 704                 goto tl_sched;
 705 goon:
 706         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
 707                           usb_rcvbulkpipe(pegasus->usb, 1),
 708                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
 709                           read_bulk_callback, pegasus);
 710         rx_status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);
 711         if (rx_status == -ENODEV)
 712                 netif_device_detach(pegasus->net);
 713         else if (rx_status) {
 714                 pegasus->flags |= PEGASUS_RX_URB_FAIL;
 715                 goto tl_sched;
 716         } else {
 717                 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
 718         }
 719
 720         return;
 721
 722 tl_sched:
 723         tasklet_schedule(&pegasus->rx_tl);
 724 }
 725
 726 static void rx_fixup(unsigned long data)
 727 {
 728         pegasus_t *pegasus;
 729         unsigned long flags;
 730         int status;
 731
 732         pegasus = (pegasus_t *) data;
 733         if (pegasus->flags & PEGASUS_UNPLUG)
 734                 return;
 735
 736         spin_lock_irqsave(&pegasus->rx_pool_lock, flags);
 737         fill_skb_pool(pegasus);
 738         if (pegasus->flags & PEGASUS_RX_URB_FAIL)
 739                 if (pegasus->rx_skb)
 740                         goto try_again;
 741         if (pegasus->rx_skb == NULL) {
 742                 pegasus->rx_skb = pull_skb(pegasus);
 743         }
 744         if (pegasus->rx_skb == NULL) {
 745                 if (netif_msg_rx_err(pegasus))
 746                         printk(KERN_WARNING "%s: low on memory\n",
 747                                         pegasus->net->name);
 748                 tasklet_schedule(&pegasus->rx_tl);
 749                 goto done;
 750         }
 751         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
 752                           usb_rcvbulkpipe(pegasus->usb, 1),
 753                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
 754                           read_bulk_callback, pegasus);
 755 try_again:
 756         status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);
 757         if (status == -ENODEV)
 758                 netif_device_detach(pegasus->net);
 759         else if (status) {
 760                 pegasus->flags |= PEGASUS_RX_URB_FAIL;
 761                 tasklet_schedule(&pegasus->rx_tl);
 762         } else {
 763                 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
 764         }
 765 done:
 766         spin_unlock_irqrestore(&pegasus->rx_pool_lock, flags);
 767 }
 768
 769 static void write_bulk_callback(struct urb *urb)
 770 {
 771         pegasus_t *pegasus = urb->context;
 772         struct net_device *net = pegasus->net;
 773
 774         if (!pegasus)
 775                 return;
 776
 777         if (!netif_device_present(net) || !netif_running(net))
 778                 return;
 779
 780         switch (urb->status) {
 781         case -EPIPE:
 782                 /* FIXME schedule_work() to clear the tx halt */
 783                 netif_stop_queue(net);
 784                 if (netif_msg_tx_err(pegasus))
 785                         printk(KERN_WARNING "%s: no tx stall recovery\n",
 786                                         net->name);
 787                 return;
 788         case -ENOENT:
 789         case -ECONNRESET:
 790         case -ESHUTDOWN:
 791                 if (netif_msg_ifdown(pegasus))
 792                         pr_debug("%s: tx unlink, %d\n", net->name, urb->status);
 793                 return;
 794         default:
 795                 if (netif_msg_tx_err(pegasus))
 796                         pr_info("%s: TX status %d\n", net->name, urb->status);
 797                 /* FALL THROUGH */
 798         case 0:
 799                 break;
 800         }
 801
 802         net->trans_start = jiffies;
 803         netif_wake_queue(net);
 804 }
 805
 806 static void intr_callback(struct urb *urb)
 807 {
 808         pegasus_t *pegasus = urb->context;
 809         struct net_device *net;
 810         int status;
 811
 812         if (!pegasus)
 813                 return;
 814         net = pegasus->net;
 815
 816         switch (urb->status) {
 817         case 0:
 818                 break;
 819         case -ECONNRESET:       /* unlink */
 820         case -ENOENT:
 821         case -ESHUTDOWN:
 822                 return;
 823         default:
 824                 /* some Pegasus-I products report LOTS of data
 825                  * toggle errors... avoid log spamming
 826                  */
 827                 if (netif_msg_timer(pegasus))
 828                         pr_debug("%s: intr status %d\n", net->name,
 829                                         urb->status);
 830         }
 831
 832         if (urb->actual_length >= 6) {
 833                 u8      * d = urb->transfer_buffer;
 834
 835                 /* byte 0 == tx_status1, reg 2B */
 836                 if (d[0] & (TX_UNDERRUN|EXCESSIVE_COL
 837                                         |LATE_COL|JABBER_TIMEOUT)) {
 838                         pegasus->stats.tx_errors++;
 839                         if (d[0] & TX_UNDERRUN)
 840                                 pegasus->stats.tx_fifo_errors++;
 841                         if (d[0] & (EXCESSIVE_COL | JABBER_TIMEOUT))
 842                                 pegasus->stats.tx_aborted_errors++;
 843                         if (d[0] & LATE_COL)
 844                                 pegasus->stats.tx_window_errors++;
 845                 }
 846
 847                 /* d[5].LINK_STATUS lies on some adapters.
 848                  * d[0].NO_CARRIER kicks in only with failed TX.
 849                  * ... so monitoring with MII may be safest.
 850                  */
 851                 if (pegasus->features & TRUST_LINK_STATUS) {
 852                         if (d[5] & LINK_STATUS)
 853                                 netif_carrier_on(net);
 854                         else
 855                                 netif_carrier_off(net);
 856                 } else {
 857                         /* Never set carrier _on_ based on ! NO_CARRIER */
 858                         if (d[0] & NO_CARRIER)
 859                                 netif_carrier_off(net);
 860                 }
 861
 862                 /* bytes 3-4 == rx_lostpkt, reg 2E/2F */
 863                 pegasus->stats.rx_missed_errors += ((d[3] & 0x7f) << 8) | d[4];
 864         }
 865
 866         status = usb_submit_urb(urb, GFP_ATOMIC);
 867         if (status == -ENODEV)
 868                 netif_device_detach(pegasus->net);
 869         if (status && netif_msg_timer(pegasus))
 870                 printk(KERN_ERR "%s: can't resubmit interrupt urb, %d\n",
 871                                 net->name, status);
 872 }
 873
 874 static void pegasus_tx_timeout(struct net_device *net)
 875 {
 876         pegasus_t *pegasus = netdev_priv(net);
 877         if (netif_msg_timer(pegasus))
 878                 printk(KERN_WARNING "%s: tx timeout\n", net->name);
 879         usb_unlink_urb(pegasus->tx_urb);
 880         pegasus->stats.tx_errors++;
 881 }
 882
 883 static int pegasus_start_xmit(struct sk_buff *skb, struct net_device *net)
 884 {
 885         pegasus_t *pegasus = netdev_priv(net);
 886         int count = ((skb->len + 2) & 0x3f) ? skb->len + 2 : skb->len + 3;
 887         int res;
 888         __u16 l16 = skb->len;
 889
 890         netif_stop_queue(net);
 891
 892         ((__le16 *) pegasus->tx_buff)[0] = cpu_to_le16(l16);
 893         memcpy(pegasus->tx_buff + 2, skb->data, skb->len);
 894         usb_fill_bulk_urb(pegasus->tx_urb, pegasus->usb,
 895                           usb_sndbulkpipe(pegasus->usb, 2),
 896                           pegasus->tx_buff, count,
 897                           write_bulk_callback, pegasus);
 898         if ((res = usb_submit_urb(pegasus->tx_urb, GFP_ATOMIC))) {
 899                 if (netif_msg_tx_err(pegasus))
 900                         printk(KERN_WARNING "%s: fail tx, %d\n",
 901                                         net->name, res);
 902                 switch (res) {
 903                 case -EPIPE:            /* stall, or disconnect from TT */
 904                         /* cleanup should already have been scheduled */
 905                         break;
 906                 case -ENODEV:           /* disconnect() upcoming */
 907                         netif_device_detach(pegasus->net);
 908                         break;
 909                 default:
 910                         pegasus->stats.tx_errors++;
 911                         netif_start_queue(net);
 912                 }
 913         } else {
 914                 pegasus->stats.tx_packets++;
 915                 pegasus->stats.tx_bytes += skb->len;
 916                 net->trans_start = jiffies;
 917         }
 918         dev_kfree_skb(skb);
 919
 920         return 0;
 921 }
 922
 923 static struct net_device_stats *pegasus_netdev_stats(struct net_device *dev)
 924 {
 925         return &((pegasus_t *) netdev_priv(dev))->stats;
 926 }
 927
 928 static inline void disable_net_traffic(pegasus_t * pegasus)
 929 {
 930         int tmp = 0;
 931
 932         set_registers(pegasus, EthCtrl0, 2, &tmp);
 933 }
 934
 935 static inline void get_interrupt_interval(pegasus_t * pegasus)
 936 {
 937         __u8 data[2];
 938
 939         read_eprom_word(pegasus, 4, (__u16 *) data);
 940         if (pegasus->usb->speed != USB_SPEED_HIGH) {
 941                 if (data[1] < 0x80) {
 942                         if (netif_msg_timer(pegasus))
 943                                 dev_info(&pegasus->intf->dev, "intr interval "
 944                                         "changed from %ums to %ums\n",
 945                                         data[1], 0x80);
 946                         data[1] = 0x80;
 947 #ifdef PEGASUS_WRITE_EEPROM
 948                         write_eprom_word(pegasus, 4, *(__u16 *) data);
 949 #endif
 950                 }
 951         }
 952         pegasus->intr_interval = data[1];
 953 }
 954
 955 static void set_carrier(struct net_device *net)
 956 {
 957         pegasus_t *pegasus = netdev_priv(net);
 958         u16 tmp;
 959
 960         if (read_mii_word(pegasus, pegasus->phy, MII_BMSR, &tmp))
 961                 return;
 962
 963         if (tmp & BMSR_LSTATUS)
 964                 netif_carrier_on(net);
 965         else
 966                 netif_carrier_off(net);
 967 }
 968
 969 static void free_all_urbs(pegasus_t * pegasus)
 970 {
 971         usb_free_urb(pegasus->intr_urb);
 972         usb_free_urb(pegasus->tx_urb);
 973         usb_free_urb(pegasus->rx_urb);
 974         usb_free_urb(pegasus->ctrl_urb);
 975 }
 976
 977 static void unlink_all_urbs(pegasus_t * pegasus)
 978 {
 979         usb_kill_urb(pegasus->intr_urb);
 980         usb_kill_urb(pegasus->tx_urb);
 981         usb_kill_urb(pegasus->rx_urb);
 982         usb_kill_urb(pegasus->ctrl_urb);
 983 }
 984
 985 static int alloc_urbs(pegasus_t * pegasus)
 986 {
 987         pegasus->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
 988         if (!pegasus->ctrl_urb) {
 989                 return 0;
 990         }
 991         pegasus->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 992         if (!pegasus->rx_urb) {
 993                 usb_free_urb(pegasus->ctrl_urb);
 994                 return 0;
 995         }
 996         pegasus->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 997         if (!pegasus->tx_urb) {
 998                 usb_free_urb(pegasus->rx_urb);
 999                 usb_free_urb(pegasus->ctrl_urb);
1000                 return 0;
1001         }
1002         pegasus->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
1003         if (!pegasus->intr_urb) {
1004                 usb_free_urb(pegasus->tx_urb);
1005                 usb_free_urb(pegasus->rx_urb);
1006                 usb_free_urb(pegasus->ctrl_urb);
1007                 return 0;
1008         }
1009
1010         return 1;
1011 }
1012
1013 static int pegasus_open(struct net_device *net)
1014 {
1015         pegasus_t *pegasus = netdev_priv(net);
1016         int res;
1017
1018         if (pegasus->rx_skb == NULL)
1019                 pegasus->rx_skb = pull_skb(pegasus);
1020         /*
1021          ** Note: no point to free the pool.  it is empty :-)
1022          */
1023         if (!pegasus->rx_skb)
1024                 return -ENOMEM;
1025
1026         res = set_registers(pegasus, EthID, 6, net->dev_addr);
1027
1028         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
1029                           usb_rcvbulkpipe(pegasus->usb, 1),
1030                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
1031                           read_bulk_callback, pegasus);
1032         if ((res = usb_submit_urb(pegasus->rx_urb, GFP_KERNEL))) {
1033                 if (res == -ENODEV)
1034                         netif_device_detach(pegasus->net);
1035                 if (netif_msg_ifup(pegasus))
1036                         pr_debug("%s: failed rx_urb, %d", net->name, res);
1037                 goto exit;
1038         }
1039
1040         usb_fill_int_urb(pegasus->intr_urb, pegasus->usb,
1041                          usb_rcvintpipe(pegasus->usb, 3),
1042                          pegasus->intr_buff, sizeof (pegasus->intr_buff),
1043                          intr_callback, pegasus, pegasus->intr_interval);
1044         if ((res = usb_submit_urb(pegasus->intr_urb, GFP_KERNEL))) {
1045                 if (res == -ENODEV)
1046                         netif_device_detach(pegasus->net);
1047                 if (netif_msg_ifup(pegasus))
1048                         pr_debug("%s: failed intr_urb, %d\n", net->name, res);
1049                 usb_kill_urb(pegasus->rx_urb);
1050                 goto exit;
1051         }
1052         if ((res = enable_net_traffic(net, pegasus->usb))) {
1053                 if (netif_msg_ifup(pegasus))
1054                         pr_debug("%s: can't enable_net_traffic() - %d\n",
1055                                         net->name, res);
1056                 res = -EIO;
1057                 usb_kill_urb(pegasus->rx_urb);
1058                 usb_kill_urb(pegasus->intr_urb);
1059                 free_skb_pool(pegasus);
1060                 goto exit;
1061         }
1062         set_carrier(net);
1063         netif_start_queue(net);
1064         if (netif_msg_ifup(pegasus))
1065                 pr_debug("%s: open\n", net->name);
1066         res = 0;
1067 exit:
1068         return res;
1069 }
1070
1071 static int pegasus_close(struct net_device *net)
1072 {
1073         pegasus_t *pegasus = netdev_priv(net);
1074
1075         netif_stop_queue(net);
1076         if (!(pegasus->flags & PEGASUS_UNPLUG))
1077                 disable_net_traffic(pegasus);
1078         tasklet_kill(&pegasus->rx_tl);
1079         unlink_all_urbs(pegasus);
1080
1081         return 0;
1082 }
1083
1084 static void pegasus_get_drvinfo(struct net_device *dev,
1085                                 struct ethtool_drvinfo *info)
1086 {
1087         pegasus_t *pegasus = netdev_priv(dev);
1088         strncpy(info->driver, driver_name, sizeof (info->driver) - 1);
1089         strncpy(info->version, DRIVER_VERSION, sizeof (info->version) - 1);
1090         usb_make_path(pegasus->usb, info->bus_info, sizeof (info->bus_info));
1091 }
1092
1093 /* also handles three patterns of some kind in hardware */
1094 #define WOL_SUPPORTED   (WAKE_MAGIC|WAKE_PHY)
1095
1096 static void
1097 pegasus_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1098 {
1099         pegasus_t       *pegasus = netdev_priv(dev);
1100
1101         wol->supported = WAKE_MAGIC | WAKE_PHY;
1102         wol->wolopts = pegasus->wolopts;
1103 }
1104
1105 static int
1106 pegasus_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1107 {
1108         pegasus_t       *pegasus = netdev_priv(dev);
1109         u8              reg78 = 0x04;
1110
1111         if (wol->wolopts & ~WOL_SUPPORTED)
1112                 return -EINVAL;
1113
1114         if (wol->wolopts & WAKE_MAGIC)
1115                 reg78 |= 0x80;
1116         if (wol->wolopts & WAKE_PHY)
1117                 reg78 |= 0x40;
1118         /* FIXME this 0x10 bit still needs to get set in the chip... */
1119         if (wol->wolopts)
1120                 pegasus->eth_regs[0] |= 0x10;
1121         else
1122                 pegasus->eth_regs[0] &= ~0x10;
1123         pegasus->wolopts = wol->wolopts;
1124         return set_register(pegasus, WakeupControl, reg78);
1125 }
1126
1127 static inline void pegasus_reset_wol(struct net_device *dev)
1128 {
1129         struct ethtool_wolinfo wol;
1130
1131         memset(&wol, 0, sizeof wol);
1132         (void) pegasus_set_wol(dev, &wol);
1133 }
1134
1135 static int
1136 pegasus_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1137 {
1138         pegasus_t *pegasus;
1139
1140         if (in_atomic())
1141                 return 0;
1142
1143         pegasus = netdev_priv(dev);
1144         mii_ethtool_gset(&pegasus->mii, ecmd);
1145
1146         return 0;
1147 }
1148
1149 static int
1150 pegasus_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1151 {
1152         pegasus_t *pegasus = netdev_priv(dev);
1153         return mii_ethtool_sset(&pegasus->mii, ecmd);
1154 }
1155
1156 static int pegasus_nway_reset(struct net_device *dev)
1157 {
1158         pegasus_t *pegasus = netdev_priv(dev);
1159         return mii_nway_restart(&pegasus->mii);
1160 }
1161
1162 static u32 pegasus_get_link(struct net_device *dev)
1163 {
1164         pegasus_t *pegasus = netdev_priv(dev);
1165         return mii_link_ok(&pegasus->mii);
1166 }
1167
1168 static u32 pegasus_get_msglevel(struct net_device *dev)
1169 {
1170         pegasus_t *pegasus = netdev_priv(dev);
1171         return pegasus->msg_enable;
1172 }
1173
1174 static void pegasus_set_msglevel(struct net_device *dev, u32 v)
1175 {
1176         pegasus_t *pegasus = netdev_priv(dev);
1177         pegasus->msg_enable = v;
1178 }
1179
1180 static struct ethtool_ops ops = {
1181         .get_drvinfo = pegasus_get_drvinfo,
1182         .get_settings = pegasus_get_settings,
1183         .set_settings = pegasus_set_settings,
1184         .nway_reset = pegasus_nway_reset,
1185         .get_link = pegasus_get_link,
1186         .get_msglevel = pegasus_get_msglevel,
1187         .set_msglevel = pegasus_set_msglevel,
1188         .get_wol = pegasus_get_wol,
1189         .set_wol = pegasus_set_wol,
1190 };
1191
1192 static int pegasus_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
1193 {
1194         __u16 *data = (__u16 *) & rq->ifr_ifru;
1195         pegasus_t *pegasus = netdev_priv(net);
1196         int res;
1197
1198         switch (cmd) {
1199         case SIOCDEVPRIVATE:
1200                 data[0] = pegasus->phy;
1201         case SIOCDEVPRIVATE + 1:
1202                 read_mii_word(pegasus, data[0], data[1] & 0x1f, &data[3]);
1203                 res = 0;
1204                 break;
1205         case SIOCDEVPRIVATE + 2:
1206                 if (!capable(CAP_NET_ADMIN))
1207                         return -EPERM;
1208                 write_mii_word(pegasus, pegasus->phy, data[1] & 0x1f, data[2]);
1209                 res = 0;
1210                 break;
1211         default:
1212                 res = -EOPNOTSUPP;
1213         }
1214         return res;
1215 }
1216
1217 static void pegasus_set_multicast(struct net_device *net)
1218 {
1219         pegasus_t *pegasus = netdev_priv(net);
1220
1221         if (net->flags & IFF_PROMISC) {
1222                 pegasus->eth_regs[EthCtrl2] |= RX_PROMISCUOUS;
1223                 if (netif_msg_link(pegasus))
1224                         pr_info("%s: Promiscuous mode enabled.\n", net->name);
1225         } else if (net->mc_count ||
1226                    (net->flags & IFF_ALLMULTI)) {
1227                 pegasus->eth_regs[EthCtrl0] |= RX_MULTICAST;
1228                 pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1229                 if (netif_msg_link(pegasus))
1230                         pr_info("%s: set allmulti\n", net->name);
1231         } else {
1232                 pegasus->eth_regs[EthCtrl0] &= ~RX_MULTICAST;
1233                 pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1234         }
1235
1236         pegasus->flags |= ETH_REGS_CHANGE;
1237         ctrl_callback(pegasus->ctrl_urb);
1238 }
1239
1240 static __u8 mii_phy_probe(pegasus_t * pegasus)
1241 {
1242         int i;
1243         __u16 tmp;
1244
1245         for (i = 0; i < 32; i++) {
1246                 read_mii_word(pegasus, i, MII_BMSR, &tmp);
1247                 if (tmp == 0 || tmp == 0xffff || (tmp & BMSR_MEDIA) == 0)
1248                         continue;
1249                 else
1250                         return i;
1251         }
1252
1253         return 0xff;
1254 }
1255
1256 static inline void setup_pegasus_II(pegasus_t * pegasus)
1257 {
1258         __u8 data = 0xa5;
1259
1260         set_register(pegasus, Reg1d, 0);
1261         set_register(pegasus, Reg7b, 1);
1262         mdelay(100);
1263         if ((pegasus->features & HAS_HOME_PNA) && mii_mode)
1264                 set_register(pegasus, Reg7b, 0);
1265         else
1266                 set_register(pegasus, Reg7b, 2);
1267
1268         set_register(pegasus, 0x83, data);
1269         get_registers(pegasus, 0x83, 1, &data);
1270
1271         if (data == 0xa5) {
1272                 pegasus->chip = 0x8513;
1273         } else {
1274                 pegasus->chip = 0;
1275         }
1276
1277         set_register(pegasus, 0x80, 0xc0);
1278         set_register(pegasus, 0x83, 0xff);
1279         set_register(pegasus, 0x84, 0x01);
1280
1281         if (pegasus->features & HAS_HOME_PNA && mii_mode)
1282                 set_register(pegasus, Reg81, 6);
1283         else
1284                 set_register(pegasus, Reg81, 2);
1285 }
1286
1287
1288 static struct workqueue_struct *pegasus_workqueue = NULL;
1289 #define CARRIER_CHECK_DELAY (2 * HZ)
1290
1291 static void check_carrier(struct work_struct *work)
1292 {
1293         pegasus_t *pegasus = container_of(work, pegasus_t, carrier_check.work);
1294         set_carrier(pegasus->net);
1295         if (!(pegasus->flags & PEGASUS_UNPLUG)) {
1296                 queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1297                         CARRIER_CHECK_DELAY);
1298         }
1299 }
1300
1301 static int pegasus_probe(struct usb_interface *intf,
1302                          const struct usb_device_id *id)
1303 {
1304         struct usb_device *dev = interface_to_usbdev(intf);
1305         struct net_device *net;
1306         pegasus_t *pegasus;
1307         int dev_index = id - pegasus_ids;
1308         int res = -ENOMEM;
1309
1310         usb_get_dev(dev);
1311         net = alloc_etherdev(sizeof(struct pegasus));
1312         if (!net) {
1313                 dev_err(&intf->dev, "can't allocate %s\n", "device");
1314                 goto out;
1315         }
1316
1317         pegasus = netdev_priv(net);
1318         memset(pegasus, 0, sizeof (struct pegasus));
1319         pegasus->dev_index = dev_index;
1320         init_waitqueue_head(&pegasus->ctrl_wait);
1321
1322         if (!alloc_urbs(pegasus)) {
1323                 dev_err(&intf->dev, "can't allocate %s\n", "urbs");
1324                 goto out1;
1325         }
1326
1327         tasklet_init(&pegasus->rx_tl, rx_fixup, (unsigned long) pegasus);
1328
1329         INIT_DELAYED_WORK(&pegasus->carrier_check, check_carrier);
1330
1331         pegasus->intf = intf;
1332         pegasus->usb = dev;
1333         pegasus->net = net;
1334         SET_MODULE_OWNER(net);
1335         net->open = pegasus_open;
1336         net->stop = pegasus_close;
1337         net->watchdog_timeo = PEGASUS_TX_TIMEOUT;
1338         net->tx_timeout = pegasus_tx_timeout;
1339         net->do_ioctl = pegasus_ioctl;
1340         net->hard_start_xmit = pegasus_start_xmit;
1341         net->set_multicast_list = pegasus_set_multicast;
1342         net->get_stats = pegasus_netdev_stats;
1343         SET_ETHTOOL_OPS(net, &ops);
1344         pegasus->mii.dev = net;
1345         pegasus->mii.mdio_read = mdio_read;
1346         pegasus->mii.mdio_write = mdio_write;
1347         pegasus->mii.phy_id_mask = 0x1f;
1348         pegasus->mii.reg_num_mask = 0x1f;
1349         spin_lock_init(&pegasus->rx_pool_lock);
1350         pegasus->msg_enable = netif_msg_init (msg_level, NETIF_MSG_DRV
1351                                 | NETIF_MSG_PROBE | NETIF_MSG_LINK);
1352
1353         pegasus->features = usb_dev_id[dev_index].private;
1354         get_interrupt_interval(pegasus);
1355         if (reset_mac(pegasus)) {
1356                 dev_err(&intf->dev, "can't reset MAC\n");
1357                 res = -EIO;
1358                 goto out2;
1359         }
1360         set_ethernet_addr(pegasus);
1361         fill_skb_pool(pegasus);
1362         if (pegasus->features & PEGASUS_II) {
1363                 dev_info(&intf->dev, "setup Pegasus II specific registers\n");
1364                 setup_pegasus_II(pegasus);
1365         }
1366         pegasus->phy = mii_phy_probe(pegasus);
1367         if (pegasus->phy == 0xff) {
1368                 dev_warn(&intf->dev, "can't locate MII phy, using default\n");
1369                 pegasus->phy = 1;
1370         }
1371         pegasus->mii.phy_id = pegasus->phy;
1372         usb_set_intfdata(intf, pegasus);
1373         SET_NETDEV_DEV(net, &intf->dev);
1374         pegasus_reset_wol(net);
1375         res = register_netdev(net);
1376         if (res)
1377                 goto out3;
1378         queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1379                                 CARRIER_CHECK_DELAY);
1380
1381         dev_info(&intf->dev, "%s, %s, %02x:%02x:%02x:%02x:%02x:%02x\n",
1382                 net->name,
1383                 usb_dev_id[dev_index].name,
1384                 net->dev_addr [0], net->dev_addr [1],
1385                 net->dev_addr [2], net->dev_addr [3],
1386                 net->dev_addr [4], net->dev_addr [5]);
1387         return 0;
1388
1389 out3:
1390         usb_set_intfdata(intf, NULL);
1391         free_skb_pool(pegasus);
1392 out2:
1393         free_all_urbs(pegasus);
1394 out1:
1395         free_netdev(net);
1396 out:
1397         usb_put_dev(dev);
1398         return res;
1399 }
1400
1401 static void pegasus_disconnect(struct usb_interface *intf)
1402 {
1403         struct pegasus *pegasus = usb_get_intfdata(intf);
1404
1405         usb_set_intfdata(intf, NULL);
1406         if (!pegasus) {
1407                 dev_dbg(&intf->dev, "unregistering non-bound device?\n");
1408                 return;
1409         }
1410
1411         pegasus->flags |= PEGASUS_UNPLUG;
1412         cancel_delayed_work(&pegasus->carrier_check);
1413         unregister_netdev(pegasus->net);
1414         usb_put_dev(interface_to_usbdev(intf));
1415         unlink_all_urbs(pegasus);
1416         free_all_urbs(pegasus);
1417         free_skb_pool(pegasus);
1418         if (pegasus->rx_skb)
1419                 dev_kfree_skb(pegasus->rx_skb);
1420         free_netdev(pegasus->net);
1421 }
1422
1423 static int pegasus_suspend (struct usb_interface *intf, pm_message_t message)
1424 {
1425         struct pegasus *pegasus = usb_get_intfdata(intf);
1426
1427         netif_device_detach (pegasus->net);
1428         cancel_delayed_work(&pegasus->carrier_check);
1429         if (netif_running(pegasus->net)) {
1430                 usb_kill_urb(pegasus->rx_urb);
1431                 usb_kill_urb(pegasus->intr_urb);
1432         }
1433         return 0;
1434 }
1435
1436 static int pegasus_resume (struct usb_interface *intf)
1437 {
1438         struct pegasus *pegasus = usb_get_intfdata(intf);
1439
1440         netif_device_attach (pegasus->net);
1441         if (netif_running(pegasus->net)) {
1442                 pegasus->rx_urb->status = 0;
1443                 pegasus->rx_urb->actual_length = 0;
1444                 read_bulk_callback(pegasus->rx_urb);
1445
1446                 pegasus->intr_urb->status = 0;
1447                 pegasus->intr_urb->actual_length = 0;
1448                 intr_callback(pegasus->intr_urb);
1449         }
1450         queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1451                                 CARRIER_CHECK_DELAY);
1452         return 0;
1453 }
1454
1455 static struct usb_driver pegasus_driver = {
1456         .name = driver_name,
1457         .probe = pegasus_probe,
1458         .disconnect = pegasus_disconnect,
1459         .id_table = pegasus_ids,
1460         .suspend = pegasus_suspend,
1461         .resume = pegasus_resume,
1462 };
1463
1464 static void parse_id(char *id)
1465 {
1466         unsigned int vendor_id=0, device_id=0, flags=0, i=0;
1467         char *token, *name=NULL;
1468
1469         if ((token = strsep(&id, ":")) != NULL)
1470                 name = token;
1471         /* name now points to a null terminated string*/
1472         if ((token = strsep(&id, ":")) != NULL)
1473                 vendor_id = simple_strtoul(token, NULL, 16);
1474         if ((token = strsep(&id, ":")) != NULL)
1475                 device_id = simple_strtoul(token, NULL, 16);
1476         flags = simple_strtoul(id, NULL, 16);
1477         pr_info("%s: new device %s, vendor ID 0x%04x, device ID 0x%04x, flags: 0x%x\n",
1478                 driver_name, name, vendor_id, device_id, flags);
1479
1480         if (vendor_id > 0x10000 || vendor_id == 0)
1481                 return;
1482         if (device_id > 0x10000 || device_id == 0)
1483                 return;
1484
1485         for (i=0; usb_dev_id[i].name; i++);
1486         usb_dev_id[i].name = name;
1487         usb_dev_id[i].vendor = vendor_id;
1488         usb_dev_id[i].device = device_id;
1489         usb_dev_id[i].private = flags;
1490         pegasus_ids[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
1491         pegasus_ids[i].idVendor = vendor_id;
1492         pegasus_ids[i].idProduct = device_id;
1493 }
1494
1495 static int __init pegasus_init(void)
1496 {
1497         pr_info("%s: %s, " DRIVER_DESC "\n", driver_name, DRIVER_VERSION);
1498         if (devid)
1499                 parse_id(devid);
1500         pegasus_workqueue = create_singlethread_workqueue("pegasus");
1501         if (!pegasus_workqueue)
1502                 return -ENOMEM;
1503         return usb_register(&pegasus_driver);
1504 }
1505
1506 static void __exit pegasus_exit(void)
1507 {
1508         destroy_workqueue(pegasus_workqueue);
1509         usb_deregister(&pegasus_driver);
1510 }
1511
1512 module_init(pegasus_init);
1513 module_exit(pegasus_exit);