drivers/usb/net/pegasus.c

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