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

   1 /*
   2  *  Copyright (c) 1999-2005 Petko Manolov (petkan@users.sourceforge.net)
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  *
   8  *      ChangeLog:
   9  *              ....    Most of the time spent on reading sources & docs.
  10  *              v0.2.x  First official release for the Linux kernel.
  11  *              v0.3.0  Beutified and structured, some bugs fixed.
  12  *              v0.3.x  URBifying bulk requests and bugfixing. First relatively
  13  *                      stable release. Still can touch device's registers only
  14  *                      from top-halves.
  15  *              v0.4.0  Control messages remained unurbified are now URBs.
  16  *                      Now we can touch the HW at any time.
  17  *              v0.4.9  Control urbs again use process context to wait. Argh...
  18  *                      Some long standing bugs (enable_net_traffic) fixed.
  19  *                      Also nasty trick about resubmiting control urb from
  20  *                      interrupt context used. Please let me know how it
  21  *                      behaves. Pegasus II support added since this version.
  22  *                      TODO: suppressing HCD warnings spewage on disconnect.
  23  *              v0.4.13 Ethernet address is now set at probe(), not at open()
  24  *                      time as this seems to break dhcpd.
  25  *              v0.5.0  branch to 2.5.x kernels
  26  *              v0.5.1  ethtool support added
  27  *              v0.5.5  rx socket buffers are in a pool and the their allocation
  28  *                      is out of the interrupt routine.
  29  */
  30
  31 #include <linux/sched.h>
  32 #include <linux/slab.h>
  33 #include <linux/init.h>
  34 #include <linux/delay.h>
  35 #include <linux/netdevice.h>
  36 #include <linux/etherdevice.h>
  37 #include <linux/ethtool.h>
  38 #include <linux/mii.h>
  39 #include <linux/usb.h>
  40 #include <linux/module.h>
  41 #include <asm/byteorder.h>
  42 #include <asm/uaccess.h>
  43 #include "pegasus.h"
  44
  45 /*
  46  * Version Information
  47  */
  48 #define DRIVER_VERSION "v0.6.14 (2006/09/27)"
  49 #define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>"
  50 #define DRIVER_DESC "Pegasus/Pegasus II USB Ethernet driver"
  51
  52 static const char driver_name[] = "pegasus";
  53
  54 #undef  PEGASUS_WRITE_EEPROM
  55 #define BMSR_MEDIA      (BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | \
  56                         BMSR_100FULL | BMSR_ANEGCAPABLE)
  57
  58 static int loopback = 0;
  59 static int mii_mode = 0;
  60 static char *devid=NULL;
  61
  62 static struct usb_eth_dev usb_dev_id[] = {
  63 #define PEGASUS_DEV(pn, vid, pid, flags)        \
  64         {.name = pn, .vendor = vid, .device = pid, .private = flags},
  65 #include "pegasus.h"
  66 #undef  PEGASUS_DEV
  67         {NULL, 0, 0, 0},
  68         {NULL, 0, 0, 0}
  69 };
  70
  71 static struct usb_device_id pegasus_ids[] = {
  72 #define PEGASUS_DEV(pn, vid, pid, flags) \
  73         {.match_flags = USB_DEVICE_ID_MATCH_DEVICE, .idVendor = vid, .idProduct = pid},
  74 #include "pegasus.h"
  75 #undef  PEGASUS_DEV
  76         {},
  77         {}
  78 };
  79
  80 MODULE_AUTHOR(DRIVER_AUTHOR);
  81 MODULE_DESCRIPTION(DRIVER_DESC);
  82 MODULE_LICENSE("GPL");
  83 module_param(loopback, bool, 0);
  84 module_param(mii_mode, bool, 0);
  85 module_param(devid, charp, 0);
  86 MODULE_PARM_DESC(loopback, "Enable MAC loopback mode (bit 0)");
  87 MODULE_PARM_DESC(mii_mode, "Enable HomePNA mode (bit 0),default=MII mode = 0");
  88 MODULE_PARM_DESC(devid, "The format is: 'DEV_name:VendorID:DeviceID:Flags'");
  89
  90 /* use ethtool to change the level for any given device */
  91 static int msg_level = -1;
  92 module_param (msg_level, int, 0);
  93 MODULE_PARM_DESC (msg_level, "Override default message level");
  94
  95 MODULE_DEVICE_TABLE(usb, pegasus_ids);
  96
  97 static int update_eth_regs_async(pegasus_t *);
  98 /* Aargh!!! I _really_ hate such tweaks */
  99 static void ctrl_callback(struct urb *urb)
 100 {
 101         pegasus_t *pegasus = urb->context;
 102
 103         if (!pegasus)
 104                 return;
 105
 106         switch (urb->status) {
 107         case 0:
 108                 if (pegasus->flags & ETH_REGS_CHANGE) {
 109                         pegasus->flags &= ~ETH_REGS_CHANGE;
 110                         pegasus->flags |= ETH_REGS_CHANGED;
 111                         update_eth_regs_async(pegasus);
 112                         return;
 113                 }
 114                 break;
 115         case -EINPROGRESS:
 116                 return;
 117         case -ENOENT:
 118                 break;
 119         default:
 120                 if (netif_msg_drv(pegasus))
 121                         dev_dbg(&pegasus->intf->dev, "%s, status %d\n",
 122                                 __FUNCTION__, urb->status);
 123         }
 124         pegasus->flags &= ~ETH_REGS_CHANGED;
 125         wake_up(&pegasus->ctrl_wait);
 126 }
 127
 128 static int get_registers(pegasus_t * pegasus, __u16 indx, __u16 size,
 129                          void *data)
 130 {
 131         int ret;
 132         char *buffer;
 133         DECLARE_WAITQUEUE(wait, current);
 134
 135         buffer = kmalloc(size, GFP_KERNEL);
 136         if (!buffer) {
 137                 if (netif_msg_drv(pegasus))
 138                         dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
 139                                         __FUNCTION__);
 140                 return -ENOMEM;
 141         }
 142         add_wait_queue(&pegasus->ctrl_wait, &wait);
 143         set_current_state(TASK_UNINTERRUPTIBLE);
 144         while (pegasus->flags & ETH_REGS_CHANGED)
 145                 schedule();
 146         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 147         set_current_state(TASK_RUNNING);
 148
 149         pegasus->dr.bRequestType = PEGASUS_REQT_READ;
 150         pegasus->dr.bRequest = PEGASUS_REQ_GET_REGS;
 151         pegasus->dr.wValue = cpu_to_le16(0);
 152         pegasus->dr.wIndex = cpu_to_le16p(&indx);
 153         pegasus->dr.wLength = cpu_to_le16p(&size);
 154         pegasus->ctrl_urb->transfer_buffer_length = size;
 155
 156         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 157                              usb_rcvctrlpipe(pegasus->usb, 0),
 158                              (char *) &pegasus->dr,
 159                              buffer, size, ctrl_callback, pegasus);
 160
 161         add_wait_queue(&pegasus->ctrl_wait, &wait);
 162         set_current_state(TASK_UNINTERRUPTIBLE);
 163
 164         /* using ATOMIC, we'd never wake up if we slept */
 165         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 166                 if (ret == -ENODEV)
 167                         netif_device_detach(pegasus->net);
 168                 if (netif_msg_drv(pegasus))
 169                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 170                                         __FUNCTION__, ret);
 171                 goto out;
 172         }
 173
 174         schedule();
 175 out:
 176         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 177         memcpy(data, buffer, size);
 178         kfree(buffer);
 179
 180         return ret;
 181 }
 182
 183 static int set_registers(pegasus_t * pegasus, __u16 indx, __u16 size,
 184                          void *data)
 185 {
 186         int ret;
 187         char *buffer;
 188         DECLARE_WAITQUEUE(wait, current);
 189
 190         buffer = kmalloc(size, GFP_KERNEL);
 191         if (!buffer) {
 192                 if (netif_msg_drv(pegasus))
 193                         dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
 194                                         __FUNCTION__);
 195                 return -ENOMEM;
 196         }
 197         memcpy(buffer, data, size);
 198
 199         add_wait_queue(&pegasus->ctrl_wait, &wait);
 200         set_current_state(TASK_UNINTERRUPTIBLE);
 201         while (pegasus->flags & ETH_REGS_CHANGED)
 202                 schedule();
 203         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 204         set_current_state(TASK_RUNNING);
 205
 206         pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
 207         pegasus->dr.bRequest = PEGASUS_REQ_SET_REGS;
 208         pegasus->dr.wValue = cpu_to_le16(0);
 209         pegasus->dr.wIndex = cpu_to_le16p(&indx);
 210         pegasus->dr.wLength = cpu_to_le16p(&size);
 211         pegasus->ctrl_urb->transfer_buffer_length = size;
 212
 213         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 214                              usb_sndctrlpipe(pegasus->usb, 0),
 215                              (char *) &pegasus->dr,
 216                              buffer, size, ctrl_callback, pegasus);
 217
 218         add_wait_queue(&pegasus->ctrl_wait, &wait);
 219         set_current_state(TASK_UNINTERRUPTIBLE);
 220
 221         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 222                 if (ret == -ENODEV)
 223                         netif_device_detach(pegasus->net);
 224                 if (netif_msg_drv(pegasus))
 225                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 226                                         __FUNCTION__, ret);
 227                 goto out;
 228         }
 229
 230         schedule();
 231 out:
 232         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 233         kfree(buffer);
 234
 235         return ret;
 236 }
 237
 238 static int set_register(pegasus_t * pegasus, __u16 indx, __u8 data)
 239 {
 240         int ret;
 241         char *tmp;
 242         DECLARE_WAITQUEUE(wait, current);
 243
 244         tmp = kmalloc(1, GFP_KERNEL);
 245         if (!tmp) {
 246                 if (netif_msg_drv(pegasus))
 247                         dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
 248                                         __FUNCTION__);
 249                 return -ENOMEM;
 250         }
 251         memcpy(tmp, &data, 1);
 252         add_wait_queue(&pegasus->ctrl_wait, &wait);
 253         set_current_state(TASK_UNINTERRUPTIBLE);
 254         while (pegasus->flags & ETH_REGS_CHANGED)
 255                 schedule();
 256         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 257         set_current_state(TASK_RUNNING);
 258
 259         pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
 260         pegasus->dr.bRequest = PEGASUS_REQ_SET_REG;
 261         pegasus->dr.wValue = cpu_to_le16(data);
 262         pegasus->dr.wIndex = cpu_to_le16p(&indx);
 263         pegasus->dr.wLength = cpu_to_le16(1);
 264         pegasus->ctrl_urb->transfer_buffer_length = 1;
 265
 266         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 267                              usb_sndctrlpipe(pegasus->usb, 0),
 268                              (char *) &pegasus->dr,
 269                              tmp, 1, ctrl_callback, pegasus);
 270
 271         add_wait_queue(&pegasus->ctrl_wait, &wait);
 272         set_current_state(TASK_UNINTERRUPTIBLE);
 273
 274         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 275                 if (ret == -ENODEV)
 276                         netif_device_detach(pegasus->net);
 277                 if (netif_msg_drv(pegasus))
 278                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 279                                         __FUNCTION__, ret);
 280                 goto out;
 281         }
 282
 283         schedule();
 284 out:
 285         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 286         kfree(tmp);
 287
 288         return ret;
 289 }
 290
 291 static int update_eth_regs_async(pegasus_t * pegasus)
 292 {
 293         int ret;
 294
 295         pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
 296         pegasus->dr.bRequest = PEGASUS_REQ_SET_REGS;
 297         pegasus->dr.wValue = 0;
 298         pegasus->dr.wIndex = cpu_to_le16(EthCtrl0);
 299         pegasus->dr.wLength = cpu_to_le16(3);
 300         pegasus->ctrl_urb->transfer_buffer_length = 3;
 301
 302         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 303                              usb_sndctrlpipe(pegasus->usb, 0),
 304                              (char *) &pegasus->dr,
 305                              pegasus->eth_regs, 3, ctrl_callback, pegasus);
 306
 307         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 308                 if (ret == -ENODEV)
 309                         netif_device_detach(pegasus->net);
 310                 if (netif_msg_drv(pegasus))
 311                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 312                                         __FUNCTION__, ret);
 313         }
 314
 315         return ret;
 316 }
 317
 318 static int read_mii_word(pegasus_t * pegasus, __u8 phy, __u8 indx, __u16 * regd)
 319 {
 320         int i;
 321         __u8 data[4] = { phy, 0, 0, indx };
 322         __le16 regdi;
 323         int ret;
 324
 325         set_register(pegasus, PhyCtrl, 0);
 326         set_registers(pegasus, PhyAddr, sizeof (data), data);
 327         set_register(pegasus, PhyCtrl, (indx | PHY_READ));
 328         for (i = 0; i < REG_TIMEOUT; i++) {
 329                 ret = get_registers(pegasus, PhyCtrl, 1, data);
 330                 if (ret == -ESHUTDOWN)
 331                         goto fail;
 332                 if (data[0] & PHY_DONE)
 333                         break;
 334         }
 335         if (i < REG_TIMEOUT) {
 336                 ret = get_registers(pegasus, PhyData, 2, &regdi);
 337                 *regd = le16_to_cpu(regdi);
 338                 return ret;
 339         }
 340 fail:
 341         if (netif_msg_drv(pegasus))
 342                 dev_warn(&pegasus->intf->dev, "%s failed\n", __FUNCTION__);
 343
 344         return ret;
 345 }
 346
 347 static int mdio_read(struct net_device *dev, int phy_id, int loc)
 348 {
 349         pegasus_t *pegasus = (pegasus_t *) netdev_priv(dev);
 350         u16 res;
 351
 352         read_mii_word(pegasus, phy_id, loc, &res);
 353         return (int)res;
 354 }
 355
 356 static int write_mii_word(pegasus_t * pegasus, __u8 phy, __u8 indx, __u16 regd)
 357 {
 358         int i;
 359         __u8 data[4] = { phy, 0, 0, indx };
 360         int ret;
 361
 362         data[1] = (u8) regd;
 363         data[2] = (u8) (regd >> 8);
 364         set_register(pegasus, PhyCtrl, 0);
 365         set_registers(pegasus, PhyAddr, sizeof(data), data);
 366         set_register(pegasus, PhyCtrl, (indx | PHY_WRITE));
 367         for (i = 0; i < REG_TIMEOUT; i++) {
 368                 ret = get_registers(pegasus, PhyCtrl, 1, data);
 369                 if (ret == -ESHUTDOWN)
 370                         goto fail;
 371                 if (data[0] & PHY_DONE)
 372                         break;
 373         }
 374         if (i < REG_TIMEOUT)
 375                 return ret;
 376
 377 fail:
 378         if (netif_msg_drv(pegasus))
 379                 dev_warn(&pegasus->intf->dev, "%s failed\n", __FUNCTION__);
 380         return -ETIMEDOUT;
 381 }
 382
 383 static void mdio_write(struct net_device *dev, int phy_id, int loc, int val)
 384 {
 385         pegasus_t *pegasus = (pegasus_t *) netdev_priv(dev);
 386
 387         write_mii_word(pegasus, phy_id, loc, val);
 388 }
 389
 390 static int read_eprom_word(pegasus_t * pegasus, __u8 index, __u16 * retdata)
 391 {
 392         int i;
 393         __u8 tmp;
 394         __le16 retdatai;
 395         int ret;
 396
 397         set_register(pegasus, EpromCtrl, 0);
 398         set_register(pegasus, EpromOffset, index);
 399         set_register(pegasus, EpromCtrl, EPROM_READ);
 400
 401         for (i = 0; i < REG_TIMEOUT; i++) {
 402                 ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
 403                 if (tmp & EPROM_DONE)
 404                         break;
 405                 if (ret == -ESHUTDOWN)
 406                         goto fail;
 407         }
 408         if (i < REG_TIMEOUT) {
 409                 ret = get_registers(pegasus, EpromData, 2, &retdatai);
 410                 *retdata = le16_to_cpu(retdatai);
 411                 return ret;
 412         }
 413
 414 fail:
 415         if (netif_msg_drv(pegasus))
 416                 dev_warn(&pegasus->intf->dev, "%s failed\n", __FUNCTION__);
 417         return -ETIMEDOUT;
 418 }
 419
 420 #ifdef  PEGASUS_WRITE_EEPROM
 421 static inline void enable_eprom_write(pegasus_t * pegasus)
 422 {
 423         __u8 tmp;
 424         int ret;
 425
 426         get_registers(pegasus, EthCtrl2, 1, &tmp);
 427         set_register(pegasus, EthCtrl2, tmp | EPROM_WR_ENABLE);
 428 }
 429
 430 static inline void disable_eprom_write(pegasus_t * pegasus)
 431 {
 432         __u8 tmp;
 433         int ret;
 434
 435         get_registers(pegasus, EthCtrl2, 1, &tmp);
 436         set_register(pegasus, EpromCtrl, 0);
 437         set_register(pegasus, EthCtrl2, tmp & ~EPROM_WR_ENABLE);
 438 }
 439
 440 static int write_eprom_word(pegasus_t * pegasus, __u8 index, __u16 data)
 441 {
 442         int i;
 443         __u8 tmp, d[4] = { 0x3f, 0, 0, EPROM_WRITE };
 444         int ret;
 445
 446         set_registers(pegasus, EpromOffset, 4, d);
 447         enable_eprom_write(pegasus);
 448         set_register(pegasus, EpromOffset, index);
 449         set_registers(pegasus, EpromData, 2, &data);
 450         set_register(pegasus, EpromCtrl, EPROM_WRITE);
 451
 452         for (i = 0; i < REG_TIMEOUT; i++) {
 453                 ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
 454                 if (ret == -ESHUTDOWN)
 455                         goto fail;
 456                 if (tmp & EPROM_DONE)
 457                         break;
 458         }
 459         disable_eprom_write(pegasus);
 460         if (i < REG_TIMEOUT)
 461                 return ret;
 462 fail:
 463         if (netif_msg_drv(pegasus))
 464                 dev_warn(&pegasus->intf->dev, "%s failed\n", __FUNCTION__);
 465         return -ETIMEDOUT;
 466 }
 467 #endif                          /* PEGASUS_WRITE_EEPROM */
 468
 469 static inline void get_node_id(pegasus_t * pegasus, __u8 * id)
 470 {
 471         int i;
 472         __u16 w16;
 473
 474         for (i = 0; i < 3; i++) {
 475                 read_eprom_word(pegasus, i, &w16);
 476                 ((__le16 *) id)[i] = cpu_to_le16p(&w16);
 477         }
 478 }
 479
 480 static void set_ethernet_addr(pegasus_t * pegasus)
 481 {
 482         __u8 node_id[6];
 483
 484         if (pegasus->features & PEGASUS_II) {
 485                 get_registers(pegasus, 0x10, sizeof(node_id), node_id);
 486         } else {
 487                 get_node_id(pegasus, node_id);
 488                 set_registers(pegasus, EthID, sizeof (node_id), node_id);
 489         }
 490         memcpy(pegasus->net->dev_addr, node_id, sizeof (node_id));
 491 }
 492
 493 static inline int reset_mac(pegasus_t * pegasus)
 494 {
 495         __u8 data = 0x8;
 496         int i;
 497
 498         set_register(pegasus, EthCtrl1, data);
 499         for (i = 0; i < REG_TIMEOUT; i++) {
 500                 get_registers(pegasus, EthCtrl1, 1, &data);
 501                 if (~data & 0x08) {
 502                         if (loopback & 1)
 503                                 break;
 504                         if (mii_mode && (pegasus->features & HAS_HOME_PNA))
 505                                 set_register(pegasus, Gpio1, 0x34);
 506                         else
 507                                 set_register(pegasus, Gpio1, 0x26);
 508                         set_register(pegasus, Gpio0, pegasus->features);
 509                         set_register(pegasus, Gpio0, DEFAULT_GPIO_SET);
 510                         break;
 511                 }
 512         }
 513         if (i == REG_TIMEOUT)
 514                 return -ETIMEDOUT;
 515
 516         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
 517             usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
 518                 set_register(pegasus, Gpio0, 0x24);
 519                 set_register(pegasus, Gpio0, 0x26);
 520         }
 521         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_ELCON) {
 522                 __u16 auxmode;
 523                 read_mii_word(pegasus, 3, 0x1b, &auxmode);
 524                 write_mii_word(pegasus, 3, 0x1b, auxmode | 4);
 525         }
 526
 527         return 0;
 528 }
 529
 530 static int enable_net_traffic(struct net_device *dev, struct usb_device *usb)
 531 {
 532         __u16 linkpart;
 533         __u8 data[4];
 534         pegasus_t *pegasus = netdev_priv(dev);
 535         int ret;
 536
 537         read_mii_word(pegasus, pegasus->phy, MII_LPA, &linkpart);
 538         data[0] = 0xc9;
 539         data[1] = 0;
 540         if (linkpart & (ADVERTISE_100FULL | ADVERTISE_10FULL))
 541                 data[1] |= 0x20;        /* set full duplex */
 542         if (linkpart & (ADVERTISE_100FULL | ADVERTISE_100HALF))
 543                 data[1] |= 0x10;        /* set 100 Mbps */
 544         if (mii_mode)
 545                 data[1] = 0;
 546         data[2] = (loopback & 1) ? 0x09 : 0x01;
 547
 548         memcpy(pegasus->eth_regs, data, sizeof (data));
 549         ret = set_registers(pegasus, EthCtrl0, 3, data);
 550
 551         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
 552             usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS2 ||
 553             usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
 554                 u16 auxmode;
 555                 read_mii_word(pegasus, 0, 0x1b, &auxmode);
 556                 write_mii_word(pegasus, 0, 0x1b, auxmode | 4);
 557         }
 558
 559         return ret;
 560 }
 561
 562 static void fill_skb_pool(pegasus_t * pegasus)
 563 {
 564         int i;
 565
 566         for (i = 0; i < RX_SKBS; i++) {
 567                 if (pegasus->rx_pool[i])
 568                         continue;
 569                 pegasus->rx_pool[i] = dev_alloc_skb(PEGASUS_MTU + 2);
 570                 /*
 571                  ** we give up if the allocation fail. the tasklet will be
 572                  ** rescheduled again anyway...
 573                  */
 574                 if (pegasus->rx_pool[i] == NULL)
 575                         return;
 576                 pegasus->rx_pool[i]->dev = pegasus->net;
 577                 skb_reserve(pegasus->rx_pool[i], 2);
 578         }
 579 }
 580
 581 static void free_skb_pool(pegasus_t * pegasus)
 582 {
 583         int i;
 584
 585         for (i = 0; i < RX_SKBS; i++) {
 586                 if (pegasus->rx_pool[i]) {
 587                         dev_kfree_skb(pegasus->rx_pool[i]);
 588                         pegasus->rx_pool[i] = NULL;
 589                 }
 590         }
 591 }
 592
 593 static inline struct sk_buff *pull_skb(pegasus_t * pegasus)
 594 {
 595         int i;
 596         struct sk_buff *skb;
 597
 598         for (i = 0; i < RX_SKBS; i++) {
 599                 if (likely(pegasus->rx_pool[i] != NULL)) {
 600                         skb = pegasus->rx_pool[i];
 601                         pegasus->rx_pool[i] = NULL;
 602                         return skb;
 603                 }
 604         }
 605         return NULL;
 606 }
 607
 608 static void read_bulk_callback(struct urb *urb)
 609 {
 610         pegasus_t *pegasus = urb->context;
 611         struct net_device *net;
 612         int rx_status, count = urb->actual_length;
 613         u8 *buf = urb->transfer_buffer;
 614         __u16 pkt_len;
 615
 616         if (!pegasus)
 617                 return;
 618
 619         net = pegasus->net;
 620         if (!netif_device_present(net) || !netif_running(net))
 621                 return;
 622
 623         switch (urb->status) {
 624         case 0:
 625                 break;
 626         case -ETIME:
 627                 if (netif_msg_rx_err(pegasus))
 628                         pr_debug("%s: reset MAC\n", net->name);
 629                 pegasus->flags &= ~PEGASUS_RX_BUSY;
 630                 break;
 631         case -EPIPE:            /* stall, or disconnect from TT */
 632                 /* FIXME schedule work to clear the halt */
 633                 if (netif_msg_rx_err(pegasus))
 634                         printk(KERN_WARNING "%s: no rx stall recovery\n",
 635                                         net->name);
 636                 return;
 637         case -ENOENT:
 638         case -ECONNRESET:
 639         case -ESHUTDOWN:
 640                 if (netif_msg_ifdown(pegasus))
 641                         pr_debug("%s: rx unlink, %d\n", net->name, urb->status);
 642                 return;
 643         default:
 644                 if (netif_msg_rx_err(pegasus))
 645                         pr_debug("%s: RX status %d\n", net->name, urb->status);
 646                 goto goon;
 647         }
 648
 649         if (!count || count < 4)
 650                 goto goon;
 651
 652         rx_status = buf[count - 2];
 653         if (rx_status & 0x1e) {
 654                 if (netif_msg_rx_err(pegasus))
 655                         pr_debug("%s: RX packet error %x\n",
 656                                         net->name, rx_status);
 657                 pegasus->stats.rx_errors++;
 658                 if (rx_status & 0x06)   // long or runt
 659                         pegasus->stats.rx_length_errors++;
 660                 if (rx_status & 0x08)
 661                         pegasus->stats.rx_crc_errors++;
 662                 if (rx_status & 0x10)   // extra bits
 663                         pegasus->stats.rx_frame_errors++;
 664                 goto goon;
 665         }
 666         if (pegasus->chip == 0x8513) {
 667                 pkt_len = le32_to_cpu(*(__le32 *)urb->transfer_buffer);
 668                 pkt_len &= 0x0fff;
 669                 pegasus->rx_skb->data += 2;
 670         } else {
 671                 pkt_len = buf[count - 3] << 8;
 672                 pkt_len += buf[count - 4];
 673                 pkt_len &= 0xfff;
 674                 pkt_len -= 8;
 675         }
 676
 677         /*
 678          * If the packet is unreasonably long, quietly drop it rather than
 679          * kernel panicing by calling skb_put.
 680          */
 681         if (pkt_len > PEGASUS_MTU)
 682                 goto goon;
 683
 684         /*
 685          * at this point we are sure pegasus->rx_skb != NULL
 686          * so we go ahead and pass up the packet.
 687          */
 688         skb_put(pegasus->rx_skb, pkt_len);
 689         pegasus->rx_skb->protocol = eth_type_trans(pegasus->rx_skb, net);
 690         netif_rx(pegasus->rx_skb);
 691         pegasus->stats.rx_packets++;
 692         pegasus->stats.rx_bytes += pkt_len;
 693
 694         if (pegasus->flags & PEGASUS_UNPLUG)
 695                 return;
 696
 697         spin_lock(&pegasus->rx_pool_lock);
 698         pegasus->rx_skb = pull_skb(pegasus);
 699         spin_unlock(&pegasus->rx_pool_lock);
 700
 701         if (pegasus->rx_skb == NULL)
 702                 goto tl_sched;
 703 goon:
 704         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
 705                           usb_rcvbulkpipe(pegasus->usb, 1),
 706                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
 707                           read_bulk_callback, pegasus);
 708         rx_status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);
 709         if (rx_status == -ENODEV)
 710                 netif_device_detach(pegasus->net);
 711         else if (rx_status) {
 712                 pegasus->flags |= PEGASUS_RX_URB_FAIL;
 713                 goto tl_sched;
 714         } else {
 715                 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
 716         }
 717
 718         return;
 719
 720 tl_sched:
 721         tasklet_schedule(&pegasus->rx_tl);
 722 }
 723
 724 static void rx_fixup(unsigned long data)
 725 {
 726         pegasus_t *pegasus;
 727         unsigned long flags;
 728         int status;
 729
 730         pegasus = (pegasus_t *) data;
 731         if (pegasus->flags & PEGASUS_UNPLUG)
 732                 return;
 733
 734         spin_lock_irqsave(&pegasus->rx_pool_lock, flags);
 735         fill_skb_pool(pegasus);
 736         if (pegasus->flags & PEGASUS_RX_URB_FAIL)
 737                 if (pegasus->rx_skb)
 738                         goto try_again;
 739         if (pegasus->rx_skb == NULL) {
 740                 pegasus->rx_skb = pull_skb(pegasus);
 741         }
 742         if (pegasus->rx_skb == NULL) {
 743                 if (netif_msg_rx_err(pegasus))
 744                         printk(KERN_WARNING "%s: low on memory\n",
 745                                         pegasus->net->name);
 746                 tasklet_schedule(&pegasus->rx_tl);
 747                 goto done;
 748         }
 749         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
 750                           usb_rcvbulkpipe(pegasus->usb, 1),
 751                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
 752                           read_bulk_callback, pegasus);
 753 try_again:
 754         status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);
 755         if (status == -ENODEV)
 756                 netif_device_detach(pegasus->net);
 757         else if (status) {
 758                 pegasus->flags |= PEGASUS_RX_URB_FAIL;
 759                 tasklet_schedule(&pegasus->rx_tl);
 760         } else {
 761                 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
 762         }
 763 done:
 764         spin_unlock_irqrestore(&pegasus->rx_pool_lock, flags);
 765 }
 766
 767 static void write_bulk_callback(struct urb *urb)
 768 {
 769         pegasus_t *pegasus = urb->context;
 770         struct net_device *net = pegasus->net;
 771
 772         if (!pegasus)
 773                 return;
 774
 775         if (!netif_device_present(net) || !netif_running(net))
 776                 return;
 777
 778         switch (urb->status) {
 779         case -EPIPE:
 780                 /* FIXME schedule_work() to clear the tx halt */
 781                 netif_stop_queue(net);
 782                 if (netif_msg_tx_err(pegasus))
 783                         printk(KERN_WARNING "%s: no tx stall recovery\n",
 784                                         net->name);
 785                 return;
 786         case -ENOENT:
 787         case -ECONNRESET:
 788         case -ESHUTDOWN:
 789                 if (netif_msg_ifdown(pegasus))
 790                         pr_debug("%s: tx unlink, %d\n", net->name, urb->status);
 791                 return;
 792         default:
 793                 if (netif_msg_tx_err(pegasus))
 794                         pr_info("%s: TX status %d\n", net->name, urb->status);
 795                 /* FALL THROUGH */
 796         case 0:
 797                 break;
 798         }
 799
 800         net->trans_start = jiffies;
 801         netif_wake_queue(net);
 802 }
 803
 804 static void intr_callback(struct urb *urb)
 805 {
 806         pegasus_t *pegasus = urb->context;
 807         struct net_device *net;
 808         int status;
 809
 810         if (!pegasus)
 811                 return;
 812         net = pegasus->net;
 813
 814         switch (urb->status) {
 815         case 0:
 816                 break;
 817         case -ECONNRESET:       /* unlink */
 818         case -ENOENT:
 819         case -ESHUTDOWN:
 820                 return;
 821         default:
 822                 /* some Pegasus-I products report LOTS of data
 823                  * toggle errors... avoid log spamming
 824                  */
 825                 if (netif_msg_timer(pegasus))
 826                         pr_debug("%s: intr status %d\n", net->name,
 827                                         urb->status);
 828         }
 829
 830         if (urb->actual_length >= 6) {
 831                 u8      * d = urb->transfer_buffer;
 832
 833                 /* byte 0 == tx_status1, reg 2B */
 834                 if (d[0] & (TX_UNDERRUN|EXCESSIVE_COL
 835                                         |LATE_COL|JABBER_TIMEOUT)) {
 836                         pegasus->stats.tx_errors++;
 837                         if (d[0] & TX_UNDERRUN)
 838                                 pegasus->stats.tx_fifo_errors++;
 839                         if (d[0] & (EXCESSIVE_COL | JABBER_TIMEOUT))
 840                                 pegasus->stats.tx_aborted_errors++;
 841                         if (d[0] & LATE_COL)
 842                                 pegasus->stats.tx_window_errors++;
 843                 }
 844
 845                 /* d[5].LINK_STATUS lies on some adapters.
 846                  * d[0].NO_CARRIER kicks in only with failed TX.
 847                  * ... so monitoring with MII may be safest.
 848                  */
 849                 if (d[0] & NO_CARRIER)
 850                         netif_carrier_off(net);
 851                 else
 852                         netif_carrier_on(net);
 853
 854                 /* bytes 3-4 == rx_lostpkt, reg 2E/2F */
 855                 pegasus->stats.rx_missed_errors += ((d[3] & 0x7f) << 8) | d[4];
 856         }
 857
 858         status = usb_submit_urb(urb, SLAB_ATOMIC);
 859         if (status == -ENODEV)
 860                 netif_device_detach(pegasus->net);
 861         if (status && netif_msg_timer(pegasus))
 862                 printk(KERN_ERR "%s: can't resubmit interrupt urb, %d\n",
 863                                 net->name, status);
 864 }
 865
 866 static void pegasus_tx_timeout(struct net_device *net)
 867 {
 868         pegasus_t *pegasus = netdev_priv(net);
 869         if (netif_msg_timer(pegasus))
 870                 printk(KERN_WARNING "%s: tx timeout\n", net->name);
 871         usb_unlink_urb(pegasus->tx_urb);
 872         pegasus->stats.tx_errors++;
 873 }
 874
 875 static int pegasus_start_xmit(struct sk_buff *skb, struct net_device *net)
 876 {
 877         pegasus_t *pegasus = netdev_priv(net);
 878         int count = ((skb->len + 2) & 0x3f) ? skb->len + 2 : skb->len + 3;
 879         int res;
 880         __u16 l16 = skb->len;
 881
 882         netif_stop_queue(net);
 883
 884         ((__le16 *) pegasus->tx_buff)[0] = cpu_to_le16(l16);
 885         memcpy(pegasus->tx_buff + 2, skb->data, skb->len);
 886         usb_fill_bulk_urb(pegasus->tx_urb, pegasus->usb,
 887                           usb_sndbulkpipe(pegasus->usb, 2),
 888                           pegasus->tx_buff, count,
 889                           write_bulk_callback, pegasus);
 890         if ((res = usb_submit_urb(pegasus->tx_urb, GFP_ATOMIC))) {
 891                 if (netif_msg_tx_err(pegasus))
 892                         printk(KERN_WARNING "%s: fail tx, %d\n",
 893                                         net->name, res);
 894                 switch (res) {
 895                 case -EPIPE:            /* stall, or disconnect from TT */
 896                         /* cleanup should already have been scheduled */
 897                         break;
 898                 case -ENODEV:           /* disconnect() upcoming */
 899                         netif_device_detach(pegasus->net);
 900                         break;
 901                 default:
 902                         pegasus->stats.tx_errors++;
 903                         netif_start_queue(net);
 904                 }
 905         } else {
 906                 pegasus->stats.tx_packets++;
 907                 pegasus->stats.tx_bytes += skb->len;
 908                 net->trans_start = jiffies;
 909         }
 910         dev_kfree_skb(skb);
 911
 912         return 0;
 913 }
 914
 915 static struct net_device_stats *pegasus_netdev_stats(struct net_device *dev)
 916 {
 917         return &((pegasus_t *) netdev_priv(dev))->stats;
 918 }
 919
 920 static inline void disable_net_traffic(pegasus_t * pegasus)
 921 {
 922         int tmp = 0;
 923
 924         set_registers(pegasus, EthCtrl0, 2, &tmp);
 925 }
 926
 927 static inline void get_interrupt_interval(pegasus_t * pegasus)
 928 {
 929         __u8 data[2];
 930
 931         read_eprom_word(pegasus, 4, (__u16 *) data);
 932         if (pegasus->usb->speed != USB_SPEED_HIGH) {
 933                 if (data[1] < 0x80) {
 934                         if (netif_msg_timer(pegasus))
 935                                 dev_info(&pegasus->intf->dev, "intr interval "
 936                                         "changed from %ums to %ums\n",
 937                                         data[1], 0x80);
 938                         data[1] = 0x80;
 939 #ifdef PEGASUS_WRITE_EEPROM
 940                         write_eprom_word(pegasus, 4, *(__u16 *) data);
 941 #endif
 942                 }
 943         }
 944         pegasus->intr_interval = data[1];
 945 }
 946
 947 static void set_carrier(struct net_device *net)
 948 {
 949         pegasus_t *pegasus = netdev_priv(net);
 950         u16 tmp;
 951
 952         if (!read_mii_word(pegasus, pegasus->phy, MII_BMSR, &tmp))
 953                 return;
 954
 955         if (tmp & BMSR_LSTATUS)
 956                 netif_carrier_on(net);
 957         else
 958                 netif_carrier_off(net);
 959 }
 960
 961 static void free_all_urbs(pegasus_t * pegasus)
 962 {
 963         usb_free_urb(pegasus->intr_urb);
 964         usb_free_urb(pegasus->tx_urb);
 965         usb_free_urb(pegasus->rx_urb);
 966         usb_free_urb(pegasus->ctrl_urb);
 967 }
 968
 969 static void unlink_all_urbs(pegasus_t * pegasus)
 970 {
 971         usb_kill_urb(pegasus->intr_urb);
 972         usb_kill_urb(pegasus->tx_urb);
 973         usb_kill_urb(pegasus->rx_urb);
 974         usb_kill_urb(pegasus->ctrl_urb);
 975 }
 976
 977 static int alloc_urbs(pegasus_t * pegasus)
 978 {
 979         pegasus->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
 980         if (!pegasus->ctrl_urb) {
 981                 return 0;
 982         }
 983         pegasus->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 984         if (!pegasus->rx_urb) {
 985                 usb_free_urb(pegasus->ctrl_urb);
 986                 return 0;
 987         }
 988         pegasus->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 989         if (!pegasus->tx_urb) {
 990                 usb_free_urb(pegasus->rx_urb);
 991                 usb_free_urb(pegasus->ctrl_urb);
 992                 return 0;
 993         }
 994         pegasus->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
 995         if (!pegasus->intr_urb) {
 996                 usb_free_urb(pegasus->tx_urb);
 997                 usb_free_urb(pegasus->rx_urb);
 998                 usb_free_urb(pegasus->ctrl_urb);
 999                 return 0;
1000         }
1001
1002         return 1;
1003 }
1004
1005 static int pegasus_open(struct net_device *net)
1006 {
1007         pegasus_t *pegasus = netdev_priv(net);
1008         int res;
1009
1010         if (pegasus->rx_skb == NULL)
1011                 pegasus->rx_skb = pull_skb(pegasus);
1012         /*
1013          ** Note: no point to free the pool.  it is empty :-)
1014          */
1015         if (!pegasus->rx_skb)
1016                 return -ENOMEM;
1017
1018         res = set_registers(pegasus, EthID, 6, net->dev_addr);
1019
1020         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
1021                           usb_rcvbulkpipe(pegasus->usb, 1),
1022                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
1023                           read_bulk_callback, pegasus);
1024         if ((res = usb_submit_urb(pegasus->rx_urb, GFP_KERNEL))) {
1025                 if (res == -ENODEV)
1026                         netif_device_detach(pegasus->net);
1027                 if (netif_msg_ifup(pegasus))
1028                         pr_debug("%s: failed rx_urb, %d", net->name, res);
1029                 goto exit;
1030         }
1031
1032         usb_fill_int_urb(pegasus->intr_urb, pegasus->usb,
1033                          usb_rcvintpipe(pegasus->usb, 3),
1034                          pegasus->intr_buff, sizeof (pegasus->intr_buff),
1035                          intr_callback, pegasus, pegasus->intr_interval);
1036         if ((res = usb_submit_urb(pegasus->intr_urb, GFP_KERNEL))) {
1037                 if (res == -ENODEV)
1038                         netif_device_detach(pegasus->net);
1039                 if (netif_msg_ifup(pegasus))
1040                         pr_debug("%s: failed intr_urb, %d\n", net->name, res);
1041                 usb_kill_urb(pegasus->rx_urb);
1042                 goto exit;
1043         }
1044         if ((res = enable_net_traffic(net, pegasus->usb))) {
1045                 if (netif_msg_ifup(pegasus))
1046                         pr_debug("%s: can't enable_net_traffic() - %d\n",
1047                                         net->name, res);
1048                 res = -EIO;
1049                 usb_kill_urb(pegasus->rx_urb);
1050                 usb_kill_urb(pegasus->intr_urb);
1051                 free_skb_pool(pegasus);
1052                 goto exit;
1053         }
1054         set_carrier(net);
1055         netif_start_queue(net);
1056         if (netif_msg_ifup(pegasus))
1057                 pr_debug("%s: open\n", net->name);
1058         res = 0;
1059 exit:
1060         return res;
1061 }
1062
1063 static int pegasus_close(struct net_device *net)
1064 {
1065         pegasus_t *pegasus = netdev_priv(net);
1066
1067         netif_stop_queue(net);
1068         if (!(pegasus->flags & PEGASUS_UNPLUG))
1069                 disable_net_traffic(pegasus);
1070         tasklet_kill(&pegasus->rx_tl);
1071         unlink_all_urbs(pegasus);
1072
1073         return 0;
1074 }
1075
1076 static void pegasus_get_drvinfo(struct net_device *dev,
1077                                 struct ethtool_drvinfo *info)
1078 {
1079         pegasus_t *pegasus = netdev_priv(dev);
1080         strncpy(info->driver, driver_name, sizeof (info->driver) - 1);
1081         strncpy(info->version, DRIVER_VERSION, sizeof (info->version) - 1);
1082         usb_make_path(pegasus->usb, info->bus_info, sizeof (info->bus_info));
1083 }
1084
1085 /* also handles three patterns of some kind in hardware */
1086 #define WOL_SUPPORTED   (WAKE_MAGIC|WAKE_PHY)
1087
1088 static void
1089 pegasus_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1090 {
1091         pegasus_t       *pegasus = netdev_priv(dev);
1092
1093         wol->supported = WAKE_MAGIC | WAKE_PHY;
1094         wol->wolopts = pegasus->wolopts;
1095 }
1096
1097 static int
1098 pegasus_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1099 {
1100         pegasus_t       *pegasus = netdev_priv(dev);
1101         u8              reg78 = 0x04;
1102
1103         if (wol->wolopts & ~WOL_SUPPORTED)
1104                 return -EINVAL;
1105
1106         if (wol->wolopts & WAKE_MAGIC)
1107                 reg78 |= 0x80;
1108         if (wol->wolopts & WAKE_PHY)
1109                 reg78 |= 0x40;
1110         /* FIXME this 0x10 bit still needs to get set in the chip... */
1111         if (wol->wolopts)
1112                 pegasus->eth_regs[0] |= 0x10;
1113         else
1114                 pegasus->eth_regs[0] &= ~0x10;
1115         pegasus->wolopts = wol->wolopts;
1116         return set_register(pegasus, WakeupControl, reg78);
1117 }
1118
1119 static inline void pegasus_reset_wol(struct net_device *dev)
1120 {
1121         struct ethtool_wolinfo wol;
1122
1123         memset(&wol, 0, sizeof wol);
1124         (void) pegasus_set_wol(dev, &wol);
1125 }
1126
1127 static int
1128 pegasus_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1129 {
1130         pegasus_t *pegasus;
1131
1132         if (in_atomic())
1133                 return 0;
1134
1135         pegasus = netdev_priv(dev);
1136         mii_ethtool_gset(&pegasus->mii, ecmd);
1137
1138         return 0;
1139 }
1140
1141 static int
1142 pegasus_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1143 {
1144         pegasus_t *pegasus = netdev_priv(dev);
1145         return mii_ethtool_sset(&pegasus->mii, ecmd);
1146 }
1147
1148 static int pegasus_nway_reset(struct net_device *dev)
1149 {
1150         pegasus_t *pegasus = netdev_priv(dev);
1151         return mii_nway_restart(&pegasus->mii);
1152 }
1153
1154 static u32 pegasus_get_link(struct net_device *dev)
1155 {
1156         pegasus_t *pegasus = netdev_priv(dev);
1157         return mii_link_ok(&pegasus->mii);
1158 }
1159
1160 static u32 pegasus_get_msglevel(struct net_device *dev)
1161 {
1162         pegasus_t *pegasus = netdev_priv(dev);
1163         return pegasus->msg_enable;
1164 }
1165
1166 static void pegasus_set_msglevel(struct net_device *dev, u32 v)
1167 {
1168         pegasus_t *pegasus = netdev_priv(dev);
1169         pegasus->msg_enable = v;
1170 }
1171
1172 static struct ethtool_ops ops = {
1173         .get_drvinfo = pegasus_get_drvinfo,
1174         .get_settings = pegasus_get_settings,
1175         .set_settings = pegasus_set_settings,
1176         .nway_reset = pegasus_nway_reset,
1177         .get_link = pegasus_get_link,
1178         .get_msglevel = pegasus_get_msglevel,
1179         .set_msglevel = pegasus_set_msglevel,
1180         .get_wol = pegasus_get_wol,
1181         .set_wol = pegasus_set_wol,
1182 };
1183
1184 static int pegasus_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
1185 {
1186         __u16 *data = (__u16 *) & rq->ifr_ifru;
1187         pegasus_t *pegasus = netdev_priv(net);
1188         int res;
1189
1190         switch (cmd) {
1191         case SIOCDEVPRIVATE:
1192                 data[0] = pegasus->phy;
1193         case SIOCDEVPRIVATE + 1:
1194                 read_mii_word(pegasus, data[0], data[1] & 0x1f, &data[3]);
1195                 res = 0;
1196                 break;
1197         case SIOCDEVPRIVATE + 2:
1198                 if (!capable(CAP_NET_ADMIN))
1199                         return -EPERM;
1200                 write_mii_word(pegasus, pegasus->phy, data[1] & 0x1f, data[2]);
1201                 res = 0;
1202                 break;
1203         default:
1204                 res = -EOPNOTSUPP;
1205         }
1206         return res;
1207 }
1208
1209 static void pegasus_set_multicast(struct net_device *net)
1210 {
1211         pegasus_t *pegasus = netdev_priv(net);
1212
1213         if (net->flags & IFF_PROMISC) {
1214                 pegasus->eth_regs[EthCtrl2] |= RX_PROMISCUOUS;
1215                 if (netif_msg_link(pegasus))
1216                         pr_info("%s: Promiscuous mode enabled.\n", net->name);
1217         } else if (net->mc_count ||
1218                    (net->flags & IFF_ALLMULTI)) {
1219                 pegasus->eth_regs[EthCtrl0] |= RX_MULTICAST;
1220                 pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1221                 if (netif_msg_link(pegasus))
1222                         pr_info("%s: set allmulti\n", net->name);
1223         } else {
1224                 pegasus->eth_regs[EthCtrl0] &= ~RX_MULTICAST;
1225                 pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1226         }
1227
1228         pegasus->flags |= ETH_REGS_CHANGE;
1229         ctrl_callback(pegasus->ctrl_urb);
1230 }
1231
1232 static __u8 mii_phy_probe(pegasus_t * pegasus)
1233 {
1234         int i;
1235         __u16 tmp;
1236
1237         for (i = 0; i < 32; i++) {
1238                 read_mii_word(pegasus, i, MII_BMSR, &tmp);
1239                 if (tmp == 0 || tmp == 0xffff || (tmp & BMSR_MEDIA) == 0)
1240                         continue;
1241                 else
1242                         return i;
1243         }
1244
1245         return 0xff;
1246 }
1247
1248 static inline void setup_pegasus_II(pegasus_t * pegasus)
1249 {
1250         __u8 data = 0xa5;
1251
1252         set_register(pegasus, Reg1d, 0);
1253         set_register(pegasus, Reg7b, 1);
1254         mdelay(100);
1255         if ((pegasus->features & HAS_HOME_PNA) && mii_mode)
1256                 set_register(pegasus, Reg7b, 0);
1257         else
1258                 set_register(pegasus, Reg7b, 2);
1259
1260         set_register(pegasus, 0x83, data);
1261         get_registers(pegasus, 0x83, 1, &data);
1262
1263         if (data == 0xa5) {
1264                 pegasus->chip = 0x8513;
1265         } else {
1266                 pegasus->chip = 0;
1267         }
1268
1269         set_register(pegasus, 0x80, 0xc0);
1270         set_register(pegasus, 0x83, 0xff);
1271         set_register(pegasus, 0x84, 0x01);
1272
1273         if (pegasus->features & HAS_HOME_PNA && mii_mode)
1274                 set_register(pegasus, Reg81, 6);
1275         else
1276                 set_register(pegasus, Reg81, 2);
1277 }
1278
1279
1280 static struct workqueue_struct *pegasus_workqueue = NULL;
1281 #define CARRIER_CHECK_DELAY (2 * HZ)
1282
1283 static void check_carrier(void *data)
1284 {
1285         pegasus_t *pegasus = data;
1286         set_carrier(pegasus->net);
1287         if (!(pegasus->flags & PEGASUS_UNPLUG)) {
1288                 queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1289                         CARRIER_CHECK_DELAY);
1290         }
1291 }
1292
1293 static int pegasus_probe(struct usb_interface *intf,
1294                          const struct usb_device_id *id)
1295 {
1296         struct usb_device *dev = interface_to_usbdev(intf);
1297         struct net_device *net;
1298         pegasus_t *pegasus;
1299         int dev_index = id - pegasus_ids;
1300         int res = -ENOMEM;
1301
1302         usb_get_dev(dev);
1303         net = alloc_etherdev(sizeof(struct pegasus));
1304         if (!net) {
1305                 dev_err(&intf->dev, "can't allocate %s\n", "device");
1306                 goto out;
1307         }
1308
1309         pegasus = netdev_priv(net);
1310         memset(pegasus, 0, sizeof (struct pegasus));
1311         pegasus->dev_index = dev_index;
1312         init_waitqueue_head(&pegasus->ctrl_wait);
1313
1314         if (!alloc_urbs(pegasus)) {
1315                 dev_err(&intf->dev, "can't allocate %s\n", "urbs");
1316                 goto out1;
1317         }
1318
1319         tasklet_init(&pegasus->rx_tl, rx_fixup, (unsigned long) pegasus);
1320
1321         INIT_WORK(&pegasus->carrier_check, check_carrier, pegasus);
1322
1323         pegasus->intf = intf;
1324         pegasus->usb = dev;
1325         pegasus->net = net;
1326         SET_MODULE_OWNER(net);
1327         net->open = pegasus_open;
1328         net->stop = pegasus_close;
1329         net->watchdog_timeo = PEGASUS_TX_TIMEOUT;
1330         net->tx_timeout = pegasus_tx_timeout;
1331         net->do_ioctl = pegasus_ioctl;
1332         net->hard_start_xmit = pegasus_start_xmit;
1333         net->set_multicast_list = pegasus_set_multicast;
1334         net->get_stats = pegasus_netdev_stats;
1335         SET_ETHTOOL_OPS(net, &ops);
1336         pegasus->mii.dev = net;
1337         pegasus->mii.mdio_read = mdio_read;
1338         pegasus->mii.mdio_write = mdio_write;
1339         pegasus->mii.phy_id_mask = 0x1f;
1340         pegasus->mii.reg_num_mask = 0x1f;
1341         spin_lock_init(&pegasus->rx_pool_lock);
1342         pegasus->msg_enable = netif_msg_init (msg_level, NETIF_MSG_DRV
1343                                 | NETIF_MSG_PROBE | NETIF_MSG_LINK);
1344
1345         pegasus->features = usb_dev_id[dev_index].private;
1346         get_interrupt_interval(pegasus);
1347         if (reset_mac(pegasus)) {
1348                 dev_err(&intf->dev, "can't reset MAC\n");
1349                 res = -EIO;
1350                 goto out2;
1351         }
1352         set_ethernet_addr(pegasus);
1353         fill_skb_pool(pegasus);
1354         if (pegasus->features & PEGASUS_II) {
1355                 dev_info(&intf->dev, "setup Pegasus II specific registers\n");
1356                 setup_pegasus_II(pegasus);
1357         }
1358         pegasus->phy = mii_phy_probe(pegasus);
1359         if (pegasus->phy == 0xff) {
1360                 dev_warn(&intf->dev, "can't locate MII phy, using default\n");
1361                 pegasus->phy = 1;
1362         }
1363         pegasus->mii.phy_id = pegasus->phy;
1364         usb_set_intfdata(intf, pegasus);
1365         SET_NETDEV_DEV(net, &intf->dev);
1366         pegasus_reset_wol(net);
1367         res = register_netdev(net);
1368         if (res)
1369                 goto out3;
1370         queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1371                                 CARRIER_CHECK_DELAY);
1372
1373         dev_info(&intf->dev, "%s, %s, %02x:%02x:%02x:%02x:%02x:%02x\n",
1374                 net->name,
1375                 usb_dev_id[dev_index].name,
1376                 net->dev_addr [0], net->dev_addr [1],
1377                 net->dev_addr [2], net->dev_addr [3],
1378                 net->dev_addr [4], net->dev_addr [5]);
1379         return 0;
1380
1381 out3:
1382         usb_set_intfdata(intf, NULL);
1383         free_skb_pool(pegasus);
1384 out2:
1385         free_all_urbs(pegasus);
1386 out1:
1387         free_netdev(net);
1388 out:
1389         usb_put_dev(dev);
1390         return res;
1391 }
1392
1393 static void pegasus_disconnect(struct usb_interface *intf)
1394 {
1395         struct pegasus *pegasus = usb_get_intfdata(intf);
1396
1397         usb_set_intfdata(intf, NULL);
1398         if (!pegasus) {
1399                 dev_dbg(&intf->dev, "unregistering non-bound device?\n");
1400                 return;
1401         }
1402
1403         pegasus->flags |= PEGASUS_UNPLUG;
1404         cancel_delayed_work(&pegasus->carrier_check);
1405         unregister_netdev(pegasus->net);
1406         usb_put_dev(interface_to_usbdev(intf));
1407         unlink_all_urbs(pegasus);
1408         free_all_urbs(pegasus);
1409         free_skb_pool(pegasus);
1410         if (pegasus->rx_skb)
1411                 dev_kfree_skb(pegasus->rx_skb);
1412         free_netdev(pegasus->net);
1413 }
1414
1415 static int pegasus_suspend (struct usb_interface *intf, pm_message_t message)
1416 {
1417         struct pegasus *pegasus = usb_get_intfdata(intf);
1418
1419         netif_device_detach (pegasus->net);
1420         cancel_delayed_work(&pegasus->carrier_check);
1421         if (netif_running(pegasus->net)) {
1422                 usb_kill_urb(pegasus->rx_urb);
1423                 usb_kill_urb(pegasus->intr_urb);
1424         }
1425         return 0;
1426 }
1427
1428 static int pegasus_resume (struct usb_interface *intf)
1429 {
1430         struct pegasus *pegasus = usb_get_intfdata(intf);
1431
1432         netif_device_attach (pegasus->net);
1433         if (netif_running(pegasus->net)) {
1434                 pegasus->rx_urb->status = 0;
1435                 pegasus->rx_urb->actual_length = 0;
1436                 read_bulk_callback(pegasus->rx_urb);
1437
1438                 pegasus->intr_urb->status = 0;
1439                 pegasus->intr_urb->actual_length = 0;
1440                 intr_callback(pegasus->intr_urb);
1441         }
1442         queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1443                                 CARRIER_CHECK_DELAY);
1444         return 0;
1445 }
1446
1447 static struct usb_driver pegasus_driver = {
1448         .name = driver_name,
1449         .probe = pegasus_probe,
1450         .disconnect = pegasus_disconnect,
1451         .id_table = pegasus_ids,
1452         .suspend = pegasus_suspend,
1453         .resume = pegasus_resume,
1454 };
1455
1456 static void parse_id(char *id)
1457 {
1458         unsigned int vendor_id=0, device_id=0, flags=0, i=0;
1459         char *token, *name=NULL;
1460
1461         if ((token = strsep(&id, ":")) != NULL)
1462                 name = token;
1463         /* name now points to a null terminated string*/
1464         if ((token = strsep(&id, ":")) != NULL)
1465                 vendor_id = simple_strtoul(token, NULL, 16);
1466         if ((token = strsep(&id, ":")) != NULL)
1467                 device_id = simple_strtoul(token, NULL, 16);
1468         flags = simple_strtoul(id, NULL, 16);
1469         pr_info("%s: new device %s, vendor ID 0x%04x, device ID 0x%04x, flags: 0x%x\n",
1470                 driver_name, name, vendor_id, device_id, flags);
1471
1472         if (vendor_id > 0x10000 || vendor_id == 0)
1473                 return;
1474         if (device_id > 0x10000 || device_id == 0)
1475                 return;
1476
1477         for (i=0; usb_dev_id[i].name; i++);
1478         usb_dev_id[i].name = name;
1479         usb_dev_id[i].vendor = vendor_id;
1480         usb_dev_id[i].device = device_id;
1481         usb_dev_id[i].private = flags;
1482         pegasus_ids[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
1483         pegasus_ids[i].idVendor = vendor_id;
1484         pegasus_ids[i].idProduct = device_id;
1485 }
1486
1487 static int __init pegasus_init(void)
1488 {
1489         pr_info("%s: %s, " DRIVER_DESC "\n", driver_name, DRIVER_VERSION);
1490         if (devid)
1491                 parse_id(devid);
1492         pegasus_workqueue = create_singlethread_workqueue("pegasus");
1493         if (!pegasus_workqueue)
1494                 return -ENOMEM;
1495         return usb_register(&pegasus_driver);
1496 }
1497
1498 static void __exit pegasus_exit(void)
1499 {
1500         destroy_workqueue(pegasus_workqueue);
1501         usb_deregister(&pegasus_driver);
1502 }
1503
1504 module_init(pegasus_init);
1505 module_exit(pegasus_exit);