drivers/net/usb/pegasus.c

   1 /*
   2  *  Copyright (c) 1999-2005 Petko Manolov (petkan@users.sourceforge.net)
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  *
   8  *      ChangeLog:
   9  *              ....    Most of the time spent on reading sources & docs.
  10  *              v0.2.x  First official release for the Linux kernel.
  11  *              v0.3.0  Beutified and structured, some bugs fixed.
  12  *              v0.3.x  URBifying bulk requests and bugfixing. First relatively
  13  *                      stable release. Still can touch device's registers only
  14  *                      from top-halves.
  15  *              v0.4.0  Control messages remained unurbified are now URBs.
  16  *                      Now we can touch the HW at any time.
  17  *              v0.4.9  Control urbs again use process context to wait. Argh...
  18  *                      Some long standing bugs (enable_net_traffic) fixed.
  19  *                      Also nasty trick about resubmiting control urb from
  20  *                      interrupt context used. Please let me know how it
  21  *                      behaves. Pegasus II support added since this version.
  22  *                      TODO: suppressing HCD warnings spewage on disconnect.
  23  *              v0.4.13 Ethernet address is now set at probe(), not at open()
  24  *                      time as this seems to break dhcpd.
  25  *              v0.5.0  branch to 2.5.x kernels
  26  *              v0.5.1  ethtool support added
  27  *              v0.5.5  rx socket buffers are in a pool and the their allocation
  28  *                      is out of the interrupt routine.
  29  */
  30
  31 #include <linux/sched.h>
  32 #include <linux/slab.h>
  33 #include <linux/init.h>
  34 #include <linux/delay.h>
  35 #include <linux/netdevice.h>
  36 #include <linux/etherdevice.h>
  37 #include <linux/ethtool.h>
  38 #include <linux/mii.h>
  39 #include <linux/usb.h>
  40 #include <linux/module.h>
  41 #include <asm/byteorder.h>
  42 #include <asm/uaccess.h>
  43 #include "pegasus.h"
  44
  45 /*
  46  * Version Information
  47  */
  48 #define DRIVER_VERSION "v0.6.14 (2006/09/27)"
  49 #define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>"
  50 #define DRIVER_DESC "Pegasus/Pegasus II USB Ethernet driver"
  51
  52 static const char driver_name[] = "pegasus";
  53
  54 #undef  PEGASUS_WRITE_EEPROM
  55 #define BMSR_MEDIA      (BMSR_10HALF | BMSR_10FULL | BMSR_100HALF | \
  56                         BMSR_100FULL | BMSR_ANEGCAPABLE)
  57
  58 static int loopback = 0;
  59 static int mii_mode = 0;
  60 static char *devid=NULL;
  61
  62 static struct usb_eth_dev usb_dev_id[] = {
  63 #define PEGASUS_DEV(pn, vid, pid, flags)        \
  64         {.name = pn, .vendor = vid, .device = pid, .private = flags},
  65 #include "pegasus.h"
  66 #undef  PEGASUS_DEV
  67         {NULL, 0, 0, 0},
  68         {NULL, 0, 0, 0}
  69 };
  70
  71 static struct usb_device_id pegasus_ids[] = {
  72 #define PEGASUS_DEV(pn, vid, pid, flags) \
  73         {.match_flags = USB_DEVICE_ID_MATCH_DEVICE, .idVendor = vid, .idProduct = pid},
  74 #include "pegasus.h"
  75 #undef  PEGASUS_DEV
  76         {},
  77         {}
  78 };
  79
  80 MODULE_AUTHOR(DRIVER_AUTHOR);
  81 MODULE_DESCRIPTION(DRIVER_DESC);
  82 MODULE_LICENSE("GPL");
  83 module_param(loopback, bool, 0);
  84 module_param(mii_mode, bool, 0);
  85 module_param(devid, charp, 0);
  86 MODULE_PARM_DESC(loopback, "Enable MAC loopback mode (bit 0)");
  87 MODULE_PARM_DESC(mii_mode, "Enable HomePNA mode (bit 0),default=MII mode = 0");
  88 MODULE_PARM_DESC(devid, "The format is: 'DEV_name:VendorID:DeviceID:Flags'");
  89
  90 /* use ethtool to change the level for any given device */
  91 static int msg_level = -1;
  92 module_param (msg_level, int, 0);
  93 MODULE_PARM_DESC (msg_level, "Override default message level");
  94
  95 MODULE_DEVICE_TABLE(usb, pegasus_ids);
  96 static const struct net_device_ops pegasus_netdev_ops;
  97
  98 static int update_eth_regs_async(pegasus_t *);
  99 /* Aargh!!! I _really_ hate such tweaks */
 100 static void ctrl_callback(struct urb *urb)
 101 {
 102         pegasus_t *pegasus = urb->context;
 103         int status = urb->status;
 104
 105         if (!pegasus)
 106                 return;
 107
 108         switch (status) {
 109         case 0:
 110                 if (pegasus->flags & ETH_REGS_CHANGE) {
 111                         pegasus->flags &= ~ETH_REGS_CHANGE;
 112                         pegasus->flags |= ETH_REGS_CHANGED;
 113                         update_eth_regs_async(pegasus);
 114                         return;
 115                 }
 116                 break;
 117         case -EINPROGRESS:
 118                 return;
 119         case -ENOENT:
 120                 break;
 121         default:
 122                 if (netif_msg_drv(pegasus) && printk_ratelimit())
 123                         dev_dbg(&pegasus->intf->dev, "%s, status %d\n",
 124                                 __func__, status);
 125         }
 126         pegasus->flags &= ~ETH_REGS_CHANGED;
 127         wake_up(&pegasus->ctrl_wait);
 128 }
 129
 130 static int get_registers(pegasus_t * pegasus, __u16 indx, __u16 size,
 131                          void *data)
 132 {
 133         int ret;
 134         char *buffer;
 135         DECLARE_WAITQUEUE(wait, current);
 136
 137         buffer = kmalloc(size, GFP_KERNEL);
 138         if (!buffer) {
 139                 if (netif_msg_drv(pegasus))
 140                         dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
 141                                         __func__);
 142                 return -ENOMEM;
 143         }
 144         add_wait_queue(&pegasus->ctrl_wait, &wait);
 145         set_current_state(TASK_UNINTERRUPTIBLE);
 146         while (pegasus->flags & ETH_REGS_CHANGED)
 147                 schedule();
 148         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 149         set_current_state(TASK_RUNNING);
 150
 151         pegasus->dr.bRequestType = PEGASUS_REQT_READ;
 152         pegasus->dr.bRequest = PEGASUS_REQ_GET_REGS;
 153         pegasus->dr.wValue = cpu_to_le16(0);
 154         pegasus->dr.wIndex = cpu_to_le16(indx);
 155         pegasus->dr.wLength = cpu_to_le16(size);
 156         pegasus->ctrl_urb->transfer_buffer_length = size;
 157
 158         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 159                              usb_rcvctrlpipe(pegasus->usb, 0),
 160                              (char *) &pegasus->dr,
 161                              buffer, size, ctrl_callback, pegasus);
 162
 163         add_wait_queue(&pegasus->ctrl_wait, &wait);
 164         set_current_state(TASK_UNINTERRUPTIBLE);
 165
 166         /* using ATOMIC, we'd never wake up if we slept */
 167         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 168                 set_current_state(TASK_RUNNING);
 169                 if (ret == -ENODEV)
 170                         netif_device_detach(pegasus->net);
 171                 if (netif_msg_drv(pegasus) && printk_ratelimit())
 172                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 173                                         __func__, ret);
 174                 goto out;
 175         }
 176
 177         schedule();
 178 out:
 179         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 180         memcpy(data, buffer, size);
 181         kfree(buffer);
 182
 183         return ret;
 184 }
 185
 186 static int set_registers(pegasus_t * pegasus, __u16 indx, __u16 size,
 187                          void *data)
 188 {
 189         int ret;
 190         char *buffer;
 191         DECLARE_WAITQUEUE(wait, current);
 192
 193         buffer = kmalloc(size, GFP_KERNEL);
 194         if (!buffer) {
 195                 if (netif_msg_drv(pegasus))
 196                         dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
 197                                         __func__);
 198                 return -ENOMEM;
 199         }
 200         memcpy(buffer, data, size);
 201
 202         add_wait_queue(&pegasus->ctrl_wait, &wait);
 203         set_current_state(TASK_UNINTERRUPTIBLE);
 204         while (pegasus->flags & ETH_REGS_CHANGED)
 205                 schedule();
 206         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 207         set_current_state(TASK_RUNNING);
 208
 209         pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
 210         pegasus->dr.bRequest = PEGASUS_REQ_SET_REGS;
 211         pegasus->dr.wValue = cpu_to_le16(0);
 212         pegasus->dr.wIndex = cpu_to_le16(indx);
 213         pegasus->dr.wLength = cpu_to_le16(size);
 214         pegasus->ctrl_urb->transfer_buffer_length = size;
 215
 216         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 217                              usb_sndctrlpipe(pegasus->usb, 0),
 218                              (char *) &pegasus->dr,
 219                              buffer, size, ctrl_callback, pegasus);
 220
 221         add_wait_queue(&pegasus->ctrl_wait, &wait);
 222         set_current_state(TASK_UNINTERRUPTIBLE);
 223
 224         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 225                 if (ret == -ENODEV)
 226                         netif_device_detach(pegasus->net);
 227                 if (netif_msg_drv(pegasus))
 228                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 229                                         __func__, ret);
 230                 goto out;
 231         }
 232
 233         schedule();
 234 out:
 235         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 236         kfree(buffer);
 237
 238         return ret;
 239 }
 240
 241 static int set_register(pegasus_t * pegasus, __u16 indx, __u8 data)
 242 {
 243         int ret;
 244         char *tmp;
 245         DECLARE_WAITQUEUE(wait, current);
 246
 247         tmp = kmalloc(1, GFP_KERNEL);
 248         if (!tmp) {
 249                 if (netif_msg_drv(pegasus))
 250                         dev_warn(&pegasus->intf->dev, "out of memory in %s\n",
 251                                         __func__);
 252                 return -ENOMEM;
 253         }
 254         memcpy(tmp, &data, 1);
 255         add_wait_queue(&pegasus->ctrl_wait, &wait);
 256         set_current_state(TASK_UNINTERRUPTIBLE);
 257         while (pegasus->flags & ETH_REGS_CHANGED)
 258                 schedule();
 259         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 260         set_current_state(TASK_RUNNING);
 261
 262         pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
 263         pegasus->dr.bRequest = PEGASUS_REQ_SET_REG;
 264         pegasus->dr.wValue = cpu_to_le16(data);
 265         pegasus->dr.wIndex = cpu_to_le16(indx);
 266         pegasus->dr.wLength = cpu_to_le16(1);
 267         pegasus->ctrl_urb->transfer_buffer_length = 1;
 268
 269         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 270                              usb_sndctrlpipe(pegasus->usb, 0),
 271                              (char *) &pegasus->dr,
 272                              tmp, 1, ctrl_callback, pegasus);
 273
 274         add_wait_queue(&pegasus->ctrl_wait, &wait);
 275         set_current_state(TASK_UNINTERRUPTIBLE);
 276
 277         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 278                 if (ret == -ENODEV)
 279                         netif_device_detach(pegasus->net);
 280                 if (netif_msg_drv(pegasus) && printk_ratelimit())
 281                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 282                                         __func__, ret);
 283                 goto out;
 284         }
 285
 286         schedule();
 287 out:
 288         remove_wait_queue(&pegasus->ctrl_wait, &wait);
 289         kfree(tmp);
 290
 291         return ret;
 292 }
 293
 294 static int update_eth_regs_async(pegasus_t * pegasus)
 295 {
 296         int ret;
 297
 298         pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
 299         pegasus->dr.bRequest = PEGASUS_REQ_SET_REGS;
 300         pegasus->dr.wValue = cpu_to_le16(0);
 301         pegasus->dr.wIndex = cpu_to_le16(EthCtrl0);
 302         pegasus->dr.wLength = cpu_to_le16(3);
 303         pegasus->ctrl_urb->transfer_buffer_length = 3;
 304
 305         usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
 306                              usb_sndctrlpipe(pegasus->usb, 0),
 307                              (char *) &pegasus->dr,
 308                              pegasus->eth_regs, 3, ctrl_callback, pegasus);
 309
 310         if ((ret = usb_submit_urb(pegasus->ctrl_urb, GFP_ATOMIC))) {
 311                 if (ret == -ENODEV)
 312                         netif_device_detach(pegasus->net);
 313                 if (netif_msg_drv(pegasus))
 314                         dev_err(&pegasus->intf->dev, "%s, status %d\n",
 315                                         __func__, ret);
 316         }
 317
 318         return ret;
 319 }
 320
 321 /* Returns 0 on success, error on failure */
 322 static int read_mii_word(pegasus_t * pegasus, __u8 phy, __u8 indx, __u16 * regd)
 323 {
 324         int i;
 325         __u8 data[4] = { phy, 0, 0, indx };
 326         __le16 regdi;
 327         int ret;
 328
 329         set_register(pegasus, PhyCtrl, 0);
 330         set_registers(pegasus, PhyAddr, sizeof (data), data);
 331         set_register(pegasus, PhyCtrl, (indx | PHY_READ));
 332         for (i = 0; i < REG_TIMEOUT; i++) {
 333                 ret = get_registers(pegasus, PhyCtrl, 1, data);
 334                 if (ret == -ESHUTDOWN)
 335                         goto fail;
 336                 if (data[0] & PHY_DONE)
 337                         break;
 338         }
 339         if (i < REG_TIMEOUT) {
 340                 ret = get_registers(pegasus, PhyData, 2, &regdi);
 341                 *regd = le16_to_cpu(regdi);
 342                 return ret;
 343         }
 344 fail:
 345         if (netif_msg_drv(pegasus))
 346                 dev_warn(&pegasus->intf->dev, "%s failed\n", __func__);
 347
 348         return ret;
 349 }
 350
 351 static int mdio_read(struct net_device *dev, int phy_id, int loc)
 352 {
 353         pegasus_t *pegasus = (pegasus_t *) netdev_priv(dev);
 354         u16 res;
 355
 356         read_mii_word(pegasus, phy_id, loc, &res);
 357         return (int)res;
 358 }
 359
 360 static int write_mii_word(pegasus_t * pegasus, __u8 phy, __u8 indx, __u16 regd)
 361 {
 362         int i;
 363         __u8 data[4] = { phy, 0, 0, indx };
 364         int ret;
 365
 366         data[1] = (u8) regd;
 367         data[2] = (u8) (regd >> 8);
 368         set_register(pegasus, PhyCtrl, 0);
 369         set_registers(pegasus, PhyAddr, sizeof(data), data);
 370         set_register(pegasus, PhyCtrl, (indx | PHY_WRITE));
 371         for (i = 0; i < REG_TIMEOUT; i++) {
 372                 ret = get_registers(pegasus, PhyCtrl, 1, data);
 373                 if (ret == -ESHUTDOWN)
 374                         goto fail;
 375                 if (data[0] & PHY_DONE)
 376                         break;
 377         }
 378         if (i < REG_TIMEOUT)
 379                 return ret;
 380
 381 fail:
 382         if (netif_msg_drv(pegasus))
 383                 dev_warn(&pegasus->intf->dev, "%s failed\n", __func__);
 384         return -ETIMEDOUT;
 385 }
 386
 387 static void mdio_write(struct net_device *dev, int phy_id, int loc, int val)
 388 {
 389         pegasus_t *pegasus = (pegasus_t *) netdev_priv(dev);
 390
 391         write_mii_word(pegasus, phy_id, loc, val);
 392 }
 393
 394 static int read_eprom_word(pegasus_t * pegasus, __u8 index, __u16 * retdata)
 395 {
 396         int i;
 397         __u8 tmp;
 398         __le16 retdatai;
 399         int ret;
 400
 401         set_register(pegasus, EpromCtrl, 0);
 402         set_register(pegasus, EpromOffset, index);
 403         set_register(pegasus, EpromCtrl, EPROM_READ);
 404
 405         for (i = 0; i < REG_TIMEOUT; i++) {
 406                 ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
 407                 if (tmp & EPROM_DONE)
 408                         break;
 409                 if (ret == -ESHUTDOWN)
 410                         goto fail;
 411         }
 412         if (i < REG_TIMEOUT) {
 413                 ret = get_registers(pegasus, EpromData, 2, &retdatai);
 414                 *retdata = le16_to_cpu(retdatai);
 415                 return ret;
 416         }
 417
 418 fail:
 419         if (netif_msg_drv(pegasus))
 420                 dev_warn(&pegasus->intf->dev, "%s failed\n", __func__);
 421         return -ETIMEDOUT;
 422 }
 423
 424 #ifdef  PEGASUS_WRITE_EEPROM
 425 static inline void enable_eprom_write(pegasus_t * pegasus)
 426 {
 427         __u8 tmp;
 428         int ret;
 429
 430         get_registers(pegasus, EthCtrl2, 1, &tmp);
 431         set_register(pegasus, EthCtrl2, tmp | EPROM_WR_ENABLE);
 432 }
 433
 434 static inline void disable_eprom_write(pegasus_t * pegasus)
 435 {
 436         __u8 tmp;
 437         int ret;
 438
 439         get_registers(pegasus, EthCtrl2, 1, &tmp);
 440         set_register(pegasus, EpromCtrl, 0);
 441         set_register(pegasus, EthCtrl2, tmp & ~EPROM_WR_ENABLE);
 442 }
 443
 444 static int write_eprom_word(pegasus_t * pegasus, __u8 index, __u16 data)
 445 {
 446         int i;
 447         __u8 tmp, d[4] = { 0x3f, 0, 0, EPROM_WRITE };
 448         int ret;
 449         __le16 le_data = cpu_to_le16(data);
 450
 451         set_registers(pegasus, EpromOffset, 4, d);
 452         enable_eprom_write(pegasus);
 453         set_register(pegasus, EpromOffset, index);
 454         set_registers(pegasus, EpromData, 2, &le_data);
 455         set_register(pegasus, EpromCtrl, EPROM_WRITE);
 456
 457         for (i = 0; i < REG_TIMEOUT; i++) {
 458                 ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
 459                 if (ret == -ESHUTDOWN)
 460                         goto fail;
 461                 if (tmp & EPROM_DONE)
 462                         break;
 463         }
 464         disable_eprom_write(pegasus);
 465         if (i < REG_TIMEOUT)
 466                 return ret;
 467 fail:
 468         if (netif_msg_drv(pegasus))
 469                 dev_warn(&pegasus->intf->dev, "%s failed\n", __func__);
 470         return -ETIMEDOUT;
 471 }
 472 #endif                          /* PEGASUS_WRITE_EEPROM */
 473
 474 static inline void get_node_id(pegasus_t * pegasus, __u8 * id)
 475 {
 476         int i;
 477         __u16 w16;
 478
 479         for (i = 0; i < 3; i++) {
 480                 read_eprom_word(pegasus, i, &w16);
 481                 ((__le16 *) id)[i] = cpu_to_le16(w16);
 482         }
 483 }
 484
 485 static void set_ethernet_addr(pegasus_t * pegasus)
 486 {
 487         __u8 node_id[6];
 488
 489         if (pegasus->features & PEGASUS_II) {
 490                 get_registers(pegasus, 0x10, sizeof(node_id), node_id);
 491         } else {
 492                 get_node_id(pegasus, node_id);
 493                 set_registers(pegasus, EthID, sizeof (node_id), node_id);
 494         }
 495         memcpy(pegasus->net->dev_addr, node_id, sizeof (node_id));
 496 }
 497
 498 static inline int reset_mac(pegasus_t * pegasus)
 499 {
 500         __u8 data = 0x8;
 501         int i;
 502
 503         set_register(pegasus, EthCtrl1, data);
 504         for (i = 0; i < REG_TIMEOUT; i++) {
 505                 get_registers(pegasus, EthCtrl1, 1, &data);
 506                 if (~data & 0x08) {
 507                         if (loopback & 1)
 508                                 break;
 509                         if (mii_mode && (pegasus->features & HAS_HOME_PNA))
 510                                 set_register(pegasus, Gpio1, 0x34);
 511                         else
 512                                 set_register(pegasus, Gpio1, 0x26);
 513                         set_register(pegasus, Gpio0, pegasus->features);
 514                         set_register(pegasus, Gpio0, DEFAULT_GPIO_SET);
 515                         break;
 516                 }
 517         }
 518         if (i == REG_TIMEOUT)
 519                 return -ETIMEDOUT;
 520
 521         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
 522             usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
 523                 set_register(pegasus, Gpio0, 0x24);
 524                 set_register(pegasus, Gpio0, 0x26);
 525         }
 526         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_ELCON) {
 527                 __u16 auxmode;
 528                 read_mii_word(pegasus, 3, 0x1b, &auxmode);
 529                 write_mii_word(pegasus, 3, 0x1b, auxmode | 4);
 530         }
 531
 532         return 0;
 533 }
 534
 535 static int enable_net_traffic(struct net_device *dev, struct usb_device *usb)
 536 {
 537         __u16 linkpart;
 538         __u8 data[4];
 539         pegasus_t *pegasus = netdev_priv(dev);
 540         int ret;
 541
 542         read_mii_word(pegasus, pegasus->phy, MII_LPA, &linkpart);
 543         data[0] = 0xc9;
 544         data[1] = 0;
 545         if (linkpart & (ADVERTISE_100FULL | ADVERTISE_10FULL))
 546                 data[1] |= 0x20;        /* set full duplex */
 547         if (linkpart & (ADVERTISE_100FULL | ADVERTISE_100HALF))
 548                 data[1] |= 0x10;        /* set 100 Mbps */
 549         if (mii_mode)
 550                 data[1] = 0;
 551         data[2] = (loopback & 1) ? 0x09 : 0x01;
 552
 553         memcpy(pegasus->eth_regs, data, sizeof (data));
 554         ret = set_registers(pegasus, EthCtrl0, 3, data);
 555
 556         if (usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS ||
 557             usb_dev_id[pegasus->dev_index].vendor == VENDOR_LINKSYS2 ||
 558             usb_dev_id[pegasus->dev_index].vendor == VENDOR_DLINK) {
 559                 u16 auxmode;
 560                 read_mii_word(pegasus, 0, 0x1b, &auxmode);
 561                 write_mii_word(pegasus, 0, 0x1b, auxmode | 4);
 562         }
 563
 564         return ret;
 565 }
 566
 567 static void fill_skb_pool(pegasus_t * pegasus)
 568 {
 569         int i;
 570
 571         for (i = 0; i < RX_SKBS; i++) {
 572                 if (pegasus->rx_pool[i])
 573                         continue;
 574                 pegasus->rx_pool[i] = dev_alloc_skb(PEGASUS_MTU + 2);
 575                 /*
 576                  ** we give up if the allocation fail. the tasklet will be
 577                  ** rescheduled again anyway...
 578                  */
 579                 if (pegasus->rx_pool[i] == NULL)
 580                         return;
 581                 skb_reserve(pegasus->rx_pool[i], 2);
 582         }
 583 }
 584
 585 static void free_skb_pool(pegasus_t * pegasus)
 586 {
 587         int i;
 588
 589         for (i = 0; i < RX_SKBS; i++) {
 590                 if (pegasus->rx_pool[i]) {
 591                         dev_kfree_skb(pegasus->rx_pool[i]);
 592                         pegasus->rx_pool[i] = NULL;
 593                 }
 594         }
 595 }
 596
 597 static inline struct sk_buff *pull_skb(pegasus_t * pegasus)
 598 {
 599         int i;
 600         struct sk_buff *skb;
 601
 602         for (i = 0; i < RX_SKBS; i++) {
 603                 if (likely(pegasus->rx_pool[i] != NULL)) {
 604                         skb = pegasus->rx_pool[i];
 605                         pegasus->rx_pool[i] = NULL;
 606                         return skb;
 607                 }
 608         }
 609         return NULL;
 610 }
 611
 612 static void read_bulk_callback(struct urb *urb)
 613 {
 614         pegasus_t *pegasus = urb->context;
 615         struct net_device *net;
 616         int rx_status, count = urb->actual_length;
 617         int status = urb->status;
 618         u8 *buf = urb->transfer_buffer;
 619         __u16 pkt_len;
 620
 621         if (!pegasus)
 622                 return;
 623
 624         net = pegasus->net;
 625         if (!netif_device_present(net) || !netif_running(net))
 626                 return;
 627
 628         switch (status) {
 629         case 0:
 630                 break;
 631         case -ETIME:
 632                 if (netif_msg_rx_err(pegasus))
 633                         pr_debug("%s: reset MAC\n", net->name);
 634                 pegasus->flags &= ~PEGASUS_RX_BUSY;
 635                 break;
 636         case -EPIPE:            /* stall, or disconnect from TT */
 637                 /* FIXME schedule work to clear the halt */
 638                 if (netif_msg_rx_err(pegasus))
 639                         printk(KERN_WARNING "%s: no rx stall recovery\n",
 640                                         net->name);
 641                 return;
 642         case -ENOENT:
 643         case -ECONNRESET:
 644         case -ESHUTDOWN:
 645                 if (netif_msg_ifdown(pegasus))
 646                         pr_debug("%s: rx unlink, %d\n", net->name, status);
 647                 return;
 648         default:
 649                 if (netif_msg_rx_err(pegasus))
 650                         pr_debug("%s: RX status %d\n", net->name, status);
 651                 goto goon;
 652         }
 653
 654         if (!count || count < 4)
 655                 goto goon;
 656
 657         rx_status = buf[count - 2];
 658         if (rx_status & 0x1e) {
 659                 if (netif_msg_rx_err(pegasus))
 660                         pr_debug("%s: RX packet error %x\n",
 661                                         net->name, rx_status);
 662                 pegasus->stats.rx_errors++;
 663                 if (rx_status & 0x06)   // long or runt
 664                         pegasus->stats.rx_length_errors++;
 665                 if (rx_status & 0x08)
 666                         pegasus->stats.rx_crc_errors++;
 667                 if (rx_status & 0x10)   // extra bits
 668                         pegasus->stats.rx_frame_errors++;
 669                 goto goon;
 670         }
 671         if (pegasus->chip == 0x8513) {
 672                 pkt_len = le32_to_cpu(*(__le32 *)urb->transfer_buffer);
 673                 pkt_len &= 0x0fff;
 674                 pegasus->rx_skb->data += 2;
 675         } else {
 676                 pkt_len = buf[count - 3] << 8;
 677                 pkt_len += buf[count - 4];
 678                 pkt_len &= 0xfff;
 679                 pkt_len -= 8;
 680         }
 681
 682         /*
 683          * If the packet is unreasonably long, quietly drop it rather than
 684          * kernel panicing by calling skb_put.
 685          */
 686         if (pkt_len > PEGASUS_MTU)
 687                 goto goon;
 688
 689         /*
 690          * at this point we are sure pegasus->rx_skb != NULL
 691          * so we go ahead and pass up the packet.
 692          */
 693         skb_put(pegasus->rx_skb, pkt_len);
 694         pegasus->rx_skb->protocol = eth_type_trans(pegasus->rx_skb, net);
 695         netif_rx(pegasus->rx_skb);
 696         pegasus->stats.rx_packets++;
 697         pegasus->stats.rx_bytes += pkt_len;
 698
 699         if (pegasus->flags & PEGASUS_UNPLUG)
 700                 return;
 701
 702         spin_lock(&pegasus->rx_pool_lock);
 703         pegasus->rx_skb = pull_skb(pegasus);
 704         spin_unlock(&pegasus->rx_pool_lock);
 705
 706         if (pegasus->rx_skb == NULL)
 707                 goto tl_sched;
 708 goon:
 709         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
 710                           usb_rcvbulkpipe(pegasus->usb, 1),
 711                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
 712                           read_bulk_callback, pegasus);
 713         rx_status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);
 714         if (rx_status == -ENODEV)
 715                 netif_device_detach(pegasus->net);
 716         else if (rx_status) {
 717                 pegasus->flags |= PEGASUS_RX_URB_FAIL;
 718                 goto tl_sched;
 719         } else {
 720                 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
 721         }
 722
 723         return;
 724
 725 tl_sched:
 726         tasklet_schedule(&pegasus->rx_tl);
 727 }
 728
 729 static void rx_fixup(unsigned long data)
 730 {
 731         pegasus_t *pegasus;
 732         unsigned long flags;
 733         int status;
 734
 735         pegasus = (pegasus_t *) data;
 736         if (pegasus->flags & PEGASUS_UNPLUG)
 737                 return;
 738
 739         spin_lock_irqsave(&pegasus->rx_pool_lock, flags);
 740         fill_skb_pool(pegasus);
 741         if (pegasus->flags & PEGASUS_RX_URB_FAIL)
 742                 if (pegasus->rx_skb)
 743                         goto try_again;
 744         if (pegasus->rx_skb == NULL) {
 745                 pegasus->rx_skb = pull_skb(pegasus);
 746         }
 747         if (pegasus->rx_skb == NULL) {
 748                 if (netif_msg_rx_err(pegasus))
 749                         printk(KERN_WARNING "%s: low on memory\n",
 750                                         pegasus->net->name);
 751                 tasklet_schedule(&pegasus->rx_tl);
 752                 goto done;
 753         }
 754         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
 755                           usb_rcvbulkpipe(pegasus->usb, 1),
 756                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
 757                           read_bulk_callback, pegasus);
 758 try_again:
 759         status = usb_submit_urb(pegasus->rx_urb, GFP_ATOMIC);
 760         if (status == -ENODEV)
 761                 netif_device_detach(pegasus->net);
 762         else if (status) {
 763                 pegasus->flags |= PEGASUS_RX_URB_FAIL;
 764                 tasklet_schedule(&pegasus->rx_tl);
 765         } else {
 766                 pegasus->flags &= ~PEGASUS_RX_URB_FAIL;
 767         }
 768 done:
 769         spin_unlock_irqrestore(&pegasus->rx_pool_lock, flags);
 770 }
 771
 772 static void write_bulk_callback(struct urb *urb)
 773 {
 774         pegasus_t *pegasus = urb->context;
 775         struct net_device *net;
 776         int status = urb->status;
 777
 778         if (!pegasus)
 779                 return;
 780
 781         net = pegasus->net;
 782
 783         if (!netif_device_present(net) || !netif_running(net))
 784                 return;
 785
 786         switch (status) {
 787         case -EPIPE:
 788                 /* FIXME schedule_work() to clear the tx halt */
 789                 netif_stop_queue(net);
 790                 if (netif_msg_tx_err(pegasus))
 791                         printk(KERN_WARNING "%s: no tx stall recovery\n",
 792                                         net->name);
 793                 return;
 794         case -ENOENT:
 795         case -ECONNRESET:
 796         case -ESHUTDOWN:
 797                 if (netif_msg_ifdown(pegasus))
 798                         pr_debug("%s: tx unlink, %d\n", net->name, status);
 799                 return;
 800         default:
 801                 if (netif_msg_tx_err(pegasus))
 802                         pr_info("%s: TX status %d\n", net->name, status);
 803                 /* FALL THROUGH */
 804         case 0:
 805                 break;
 806         }
 807
 808         net->trans_start = jiffies;
 809         netif_wake_queue(net);
 810 }
 811
 812 static void intr_callback(struct urb *urb)
 813 {
 814         pegasus_t *pegasus = urb->context;
 815         struct net_device *net;
 816         int res, status = urb->status;
 817
 818         if (!pegasus)
 819                 return;
 820         net = pegasus->net;
 821
 822         switch (status) {
 823         case 0:
 824                 break;
 825         case -ECONNRESET:       /* unlink */
 826         case -ENOENT:
 827         case -ESHUTDOWN:
 828                 return;
 829         default:
 830                 /* some Pegasus-I products report LOTS of data
 831                  * toggle errors... avoid log spamming
 832                  */
 833                 if (netif_msg_timer(pegasus))
 834                         pr_debug("%s: intr status %d\n", net->name,
 835                                         status);
 836         }
 837
 838         if (urb->actual_length >= 6) {
 839                 u8      * d = urb->transfer_buffer;
 840
 841                 /* byte 0 == tx_status1, reg 2B */
 842                 if (d[0] & (TX_UNDERRUN|EXCESSIVE_COL
 843                                         |LATE_COL|JABBER_TIMEOUT)) {
 844                         pegasus->stats.tx_errors++;
 845                         if (d[0] & TX_UNDERRUN)
 846                                 pegasus->stats.tx_fifo_errors++;
 847                         if (d[0] & (EXCESSIVE_COL | JABBER_TIMEOUT))
 848                                 pegasus->stats.tx_aborted_errors++;
 849                         if (d[0] & LATE_COL)
 850                                 pegasus->stats.tx_window_errors++;
 851                 }
 852
 853                 /* d[5].LINK_STATUS lies on some adapters.
 854                  * d[0].NO_CARRIER kicks in only with failed TX.
 855                  * ... so monitoring with MII may be safest.
 856                  */
 857
 858                 /* bytes 3-4 == rx_lostpkt, reg 2E/2F */
 859                 pegasus->stats.rx_missed_errors += ((d[3] & 0x7f) << 8) | d[4];
 860         }
 861
 862         res = usb_submit_urb(urb, GFP_ATOMIC);
 863         if (res == -ENODEV)
 864                 netif_device_detach(pegasus->net);
 865         if (res && netif_msg_timer(pegasus))
 866                 printk(KERN_ERR "%s: can't resubmit interrupt urb, %d\n",
 867                                 net->name, res);
 868 }
 869
 870 static void pegasus_tx_timeout(struct net_device *net)
 871 {
 872         pegasus_t *pegasus = netdev_priv(net);
 873         if (netif_msg_timer(pegasus))
 874                 printk(KERN_WARNING "%s: tx timeout\n", net->name);
 875         usb_unlink_urb(pegasus->tx_urb);
 876         pegasus->stats.tx_errors++;
 877 }
 878
 879 static int pegasus_start_xmit(struct sk_buff *skb, struct net_device *net)
 880 {
 881         pegasus_t *pegasus = netdev_priv(net);
 882         int count = ((skb->len + 2) & 0x3f) ? skb->len + 2 : skb->len + 3;
 883         int res;
 884         __u16 l16 = skb->len;
 885
 886         netif_stop_queue(net);
 887
 888         ((__le16 *) pegasus->tx_buff)[0] = cpu_to_le16(l16);
 889         skb_copy_from_linear_data(skb, pegasus->tx_buff + 2, skb->len);
 890         usb_fill_bulk_urb(pegasus->tx_urb, pegasus->usb,
 891                           usb_sndbulkpipe(pegasus->usb, 2),
 892                           pegasus->tx_buff, count,
 893                           write_bulk_callback, pegasus);
 894         if ((res = usb_submit_urb(pegasus->tx_urb, GFP_ATOMIC))) {
 895                 if (netif_msg_tx_err(pegasus))
 896                         printk(KERN_WARNING "%s: fail tx, %d\n",
 897                                         net->name, res);
 898                 switch (res) {
 899                 case -EPIPE:            /* stall, or disconnect from TT */
 900                         /* cleanup should already have been scheduled */
 901                         break;
 902                 case -ENODEV:           /* disconnect() upcoming */
 903                 case -EPERM:
 904                         netif_device_detach(pegasus->net);
 905                         break;
 906                 default:
 907                         pegasus->stats.tx_errors++;
 908                         netif_start_queue(net);
 909                 }
 910         } else {
 911                 pegasus->stats.tx_packets++;
 912                 pegasus->stats.tx_bytes += skb->len;
 913                 net->trans_start = jiffies;
 914         }
 915         dev_kfree_skb(skb);
 916
 917         return 0;
 918 }
 919
 920 static struct net_device_stats *pegasus_netdev_stats(struct net_device *dev)
 921 {
 922         return &((pegasus_t *) netdev_priv(dev))->stats;
 923 }
 924
 925 static inline void disable_net_traffic(pegasus_t * pegasus)
 926 {
 927         __le16 tmp = cpu_to_le16(0);
 928
 929         set_registers(pegasus, EthCtrl0, sizeof(tmp), &tmp);
 930 }
 931
 932 static inline void get_interrupt_interval(pegasus_t * pegasus)
 933 {
 934         u16 data;
 935         u8 interval;
 936
 937         read_eprom_word(pegasus, 4, &data);
 938         interval = data >> 8;
 939         if (pegasus->usb->speed != USB_SPEED_HIGH) {
 940                 if (interval < 0x80) {
 941                         if (netif_msg_timer(pegasus))
 942                                 dev_info(&pegasus->intf->dev, "intr interval "
 943                                         "changed from %ums to %ums\n",
 944                                         interval, 0x80);
 945                         interval = 0x80;
 946                         data = (data & 0x00FF) | ((u16)interval << 8);
 947 #ifdef PEGASUS_WRITE_EEPROM
 948                         write_eprom_word(pegasus, 4, data);
 949 #endif
 950                 }
 951         }
 952         pegasus->intr_interval = interval;
 953 }
 954
 955 static void set_carrier(struct net_device *net)
 956 {
 957         pegasus_t *pegasus = netdev_priv(net);
 958         u16 tmp;
 959
 960         if (read_mii_word(pegasus, pegasus->phy, MII_BMSR, &tmp))
 961                 return;
 962
 963         if (tmp & BMSR_LSTATUS)
 964                 netif_carrier_on(net);
 965         else
 966                 netif_carrier_off(net);
 967 }
 968
 969 static void free_all_urbs(pegasus_t * pegasus)
 970 {
 971         usb_free_urb(pegasus->intr_urb);
 972         usb_free_urb(pegasus->tx_urb);
 973         usb_free_urb(pegasus->rx_urb);
 974         usb_free_urb(pegasus->ctrl_urb);
 975 }
 976
 977 static void unlink_all_urbs(pegasus_t * pegasus)
 978 {
 979         usb_kill_urb(pegasus->intr_urb);
 980         usb_kill_urb(pegasus->tx_urb);
 981         usb_kill_urb(pegasus->rx_urb);
 982         usb_kill_urb(pegasus->ctrl_urb);
 983 }
 984
 985 static int alloc_urbs(pegasus_t * pegasus)
 986 {
 987         pegasus->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
 988         if (!pegasus->ctrl_urb) {
 989                 return 0;
 990         }
 991         pegasus->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 992         if (!pegasus->rx_urb) {
 993                 usb_free_urb(pegasus->ctrl_urb);
 994                 return 0;
 995         }
 996         pegasus->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 997         if (!pegasus->tx_urb) {
 998                 usb_free_urb(pegasus->rx_urb);
 999                 usb_free_urb(pegasus->ctrl_urb);
1000                 return 0;
1001         }
1002         pegasus->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
1003         if (!pegasus->intr_urb) {
1004                 usb_free_urb(pegasus->tx_urb);
1005                 usb_free_urb(pegasus->rx_urb);
1006                 usb_free_urb(pegasus->ctrl_urb);
1007                 return 0;
1008         }
1009
1010         return 1;
1011 }
1012
1013 static int pegasus_open(struct net_device *net)
1014 {
1015         pegasus_t *pegasus = netdev_priv(net);
1016         int res;
1017
1018         if (pegasus->rx_skb == NULL)
1019                 pegasus->rx_skb = pull_skb(pegasus);
1020         /*
1021          ** Note: no point to free the pool.  it is empty :-)
1022          */
1023         if (!pegasus->rx_skb)
1024                 return -ENOMEM;
1025
1026         res = set_registers(pegasus, EthID, 6, net->dev_addr);
1027
1028         usb_fill_bulk_urb(pegasus->rx_urb, pegasus->usb,
1029                           usb_rcvbulkpipe(pegasus->usb, 1),
1030                           pegasus->rx_skb->data, PEGASUS_MTU + 8,
1031                           read_bulk_callback, pegasus);
1032         if ((res = usb_submit_urb(pegasus->rx_urb, GFP_KERNEL))) {
1033                 if (res == -ENODEV)
1034                         netif_device_detach(pegasus->net);
1035                 if (netif_msg_ifup(pegasus))
1036                         pr_debug("%s: failed rx_urb, %d", net->name, res);
1037                 goto exit;
1038         }
1039
1040         usb_fill_int_urb(pegasus->intr_urb, pegasus->usb,
1041                          usb_rcvintpipe(pegasus->usb, 3),
1042                          pegasus->intr_buff, sizeof (pegasus->intr_buff),
1043                          intr_callback, pegasus, pegasus->intr_interval);
1044         if ((res = usb_submit_urb(pegasus->intr_urb, GFP_KERNEL))) {
1045                 if (res == -ENODEV)
1046                         netif_device_detach(pegasus->net);
1047                 if (netif_msg_ifup(pegasus))
1048                         pr_debug("%s: failed intr_urb, %d\n", net->name, res);
1049                 usb_kill_urb(pegasus->rx_urb);
1050                 goto exit;
1051         }
1052         if ((res = enable_net_traffic(net, pegasus->usb))) {
1053                 if (netif_msg_ifup(pegasus))
1054                         pr_debug("%s: can't enable_net_traffic() - %d\n",
1055                                         net->name, res);
1056                 res = -EIO;
1057                 usb_kill_urb(pegasus->rx_urb);
1058                 usb_kill_urb(pegasus->intr_urb);
1059                 free_skb_pool(pegasus);
1060                 goto exit;
1061         }
1062         set_carrier(net);
1063         netif_start_queue(net);
1064         if (netif_msg_ifup(pegasus))
1065                 pr_debug("%s: open\n", net->name);
1066         res = 0;
1067 exit:
1068         return res;
1069 }
1070
1071 static int pegasus_close(struct net_device *net)
1072 {
1073         pegasus_t *pegasus = netdev_priv(net);
1074
1075         netif_stop_queue(net);
1076         if (!(pegasus->flags & PEGASUS_UNPLUG))
1077                 disable_net_traffic(pegasus);
1078         tasklet_kill(&pegasus->rx_tl);
1079         unlink_all_urbs(pegasus);
1080
1081         return 0;
1082 }
1083
1084 static void pegasus_get_drvinfo(struct net_device *dev,
1085                                 struct ethtool_drvinfo *info)
1086 {
1087         pegasus_t *pegasus = netdev_priv(dev);
1088         strncpy(info->driver, driver_name, sizeof (info->driver) - 1);
1089         strncpy(info->version, DRIVER_VERSION, sizeof (info->version) - 1);
1090         usb_make_path(pegasus->usb, info->bus_info, sizeof (info->bus_info));
1091 }
1092
1093 /* also handles three patterns of some kind in hardware */
1094 #define WOL_SUPPORTED   (WAKE_MAGIC|WAKE_PHY)
1095
1096 static void
1097 pegasus_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1098 {
1099         pegasus_t       *pegasus = netdev_priv(dev);
1100
1101         wol->supported = WAKE_MAGIC | WAKE_PHY;
1102         wol->wolopts = pegasus->wolopts;
1103 }
1104
1105 static int
1106 pegasus_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
1107 {
1108         pegasus_t       *pegasus = netdev_priv(dev);
1109         u8              reg78 = 0x04;
1110
1111         if (wol->wolopts & ~WOL_SUPPORTED)
1112                 return -EINVAL;
1113
1114         if (wol->wolopts & WAKE_MAGIC)
1115                 reg78 |= 0x80;
1116         if (wol->wolopts & WAKE_PHY)
1117                 reg78 |= 0x40;
1118         /* FIXME this 0x10 bit still needs to get set in the chip... */
1119         if (wol->wolopts)
1120                 pegasus->eth_regs[0] |= 0x10;
1121         else
1122                 pegasus->eth_regs[0] &= ~0x10;
1123         pegasus->wolopts = wol->wolopts;
1124         return set_register(pegasus, WakeupControl, reg78);
1125 }
1126
1127 static inline void pegasus_reset_wol(struct net_device *dev)
1128 {
1129         struct ethtool_wolinfo wol;
1130
1131         memset(&wol, 0, sizeof wol);
1132         (void) pegasus_set_wol(dev, &wol);
1133 }
1134
1135 static int
1136 pegasus_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1137 {
1138         pegasus_t *pegasus;
1139
1140         pegasus = netdev_priv(dev);
1141         mii_ethtool_gset(&pegasus->mii, ecmd);
1142         return 0;
1143 }
1144
1145 static int
1146 pegasus_set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
1147 {
1148         pegasus_t *pegasus = netdev_priv(dev);
1149         return mii_ethtool_sset(&pegasus->mii, ecmd);
1150 }
1151
1152 static int pegasus_nway_reset(struct net_device *dev)
1153 {
1154         pegasus_t *pegasus = netdev_priv(dev);
1155         return mii_nway_restart(&pegasus->mii);
1156 }
1157
1158 static u32 pegasus_get_link(struct net_device *dev)
1159 {
1160         pegasus_t *pegasus = netdev_priv(dev);
1161         return mii_link_ok(&pegasus->mii);
1162 }
1163
1164 static u32 pegasus_get_msglevel(struct net_device *dev)
1165 {
1166         pegasus_t *pegasus = netdev_priv(dev);
1167         return pegasus->msg_enable;
1168 }
1169
1170 static void pegasus_set_msglevel(struct net_device *dev, u32 v)
1171 {
1172         pegasus_t *pegasus = netdev_priv(dev);
1173         pegasus->msg_enable = v;
1174 }
1175
1176 static struct ethtool_ops ops = {
1177         .get_drvinfo = pegasus_get_drvinfo,
1178         .get_settings = pegasus_get_settings,
1179         .set_settings = pegasus_set_settings,
1180         .nway_reset = pegasus_nway_reset,
1181         .get_link = pegasus_get_link,
1182         .get_msglevel = pegasus_get_msglevel,
1183         .set_msglevel = pegasus_set_msglevel,
1184         .get_wol = pegasus_get_wol,
1185         .set_wol = pegasus_set_wol,
1186 };
1187
1188 static int pegasus_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
1189 {
1190         __u16 *data = (__u16 *) & rq->ifr_ifru;
1191         pegasus_t *pegasus = netdev_priv(net);
1192         int res;
1193
1194         switch (cmd) {
1195         case SIOCDEVPRIVATE:
1196                 data[0] = pegasus->phy;
1197         case SIOCDEVPRIVATE + 1:
1198                 read_mii_word(pegasus, data[0], data[1] & 0x1f, &data[3]);
1199                 res = 0;
1200                 break;
1201         case SIOCDEVPRIVATE + 2:
1202                 if (!capable(CAP_NET_ADMIN))
1203                         return -EPERM;
1204                 write_mii_word(pegasus, pegasus->phy, data[1] & 0x1f, data[2]);
1205                 res = 0;
1206                 break;
1207         default:
1208                 res = -EOPNOTSUPP;
1209         }
1210         return res;
1211 }
1212
1213 static void pegasus_set_multicast(struct net_device *net)
1214 {
1215         pegasus_t *pegasus = netdev_priv(net);
1216
1217         if (net->flags & IFF_PROMISC) {
1218                 pegasus->eth_regs[EthCtrl2] |= RX_PROMISCUOUS;
1219                 if (netif_msg_link(pegasus))
1220                         pr_info("%s: Promiscuous mode enabled.\n", net->name);
1221         } else if (net->mc_count || (net->flags & IFF_ALLMULTI)) {
1222                 pegasus->eth_regs[EthCtrl0] |= RX_MULTICAST;
1223                 pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1224                 if (netif_msg_link(pegasus))
1225                         pr_debug("%s: set allmulti\n", net->name);
1226         } else {
1227                 pegasus->eth_regs[EthCtrl0] &= ~RX_MULTICAST;
1228                 pegasus->eth_regs[EthCtrl2] &= ~RX_PROMISCUOUS;
1229         }
1230
1231         pegasus->ctrl_urb->status = 0;
1232
1233         pegasus->flags |= ETH_REGS_CHANGE;
1234         ctrl_callback(pegasus->ctrl_urb);
1235 }
1236
1237 static __u8 mii_phy_probe(pegasus_t * pegasus)
1238 {
1239         int i;
1240         __u16 tmp;
1241
1242         for (i = 0; i < 32; i++) {
1243                 read_mii_word(pegasus, i, MII_BMSR, &tmp);
1244                 if (tmp == 0 || tmp == 0xffff || (tmp & BMSR_MEDIA) == 0)
1245                         continue;
1246                 else
1247                         return i;
1248         }
1249
1250         return 0xff;
1251 }
1252
1253 static inline void setup_pegasus_II(pegasus_t * pegasus)
1254 {
1255         __u8 data = 0xa5;
1256
1257         set_register(pegasus, Reg1d, 0);
1258         set_register(pegasus, Reg7b, 1);
1259         mdelay(100);
1260         if ((pegasus->features & HAS_HOME_PNA) && mii_mode)
1261                 set_register(pegasus, Reg7b, 0);
1262         else
1263                 set_register(pegasus, Reg7b, 2);
1264
1265         set_register(pegasus, 0x83, data);
1266         get_registers(pegasus, 0x83, 1, &data);
1267
1268         if (data == 0xa5) {
1269                 pegasus->chip = 0x8513;
1270         } else {
1271                 pegasus->chip = 0;
1272         }
1273
1274         set_register(pegasus, 0x80, 0xc0);
1275         set_register(pegasus, 0x83, 0xff);
1276         set_register(pegasus, 0x84, 0x01);
1277
1278         if (pegasus->features & HAS_HOME_PNA && mii_mode)
1279                 set_register(pegasus, Reg81, 6);
1280         else
1281                 set_register(pegasus, Reg81, 2);
1282 }
1283
1284
1285 static int pegasus_count;
1286 static struct workqueue_struct *pegasus_workqueue = NULL;
1287 #define CARRIER_CHECK_DELAY (2 * HZ)
1288
1289 static void check_carrier(struct work_struct *work)
1290 {
1291         pegasus_t *pegasus = container_of(work, pegasus_t, carrier_check.work);
1292         set_carrier(pegasus->net);
1293         if (!(pegasus->flags & PEGASUS_UNPLUG)) {
1294                 queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1295                         CARRIER_CHECK_DELAY);
1296         }
1297 }
1298
1299 static int pegasus_blacklisted(struct usb_device *udev)
1300 {
1301         struct usb_device_descriptor *udd = &udev->descriptor;
1302
1303         /* Special quirk to keep the driver from handling the Belkin Bluetooth
1304          * dongle which happens to have the same ID.
1305          */
1306         if ((udd->idVendor == cpu_to_le16(VENDOR_BELKIN)) &&
1307             (udd->idProduct == cpu_to_le16(0x0121)) &&
1308             (udd->bDeviceClass == USB_CLASS_WIRELESS_CONTROLLER) &&
1309             (udd->bDeviceProtocol == 1))
1310                 return 1;
1311
1312         return 0;
1313 }
1314
1315 /* we rely on probe() and remove() being serialized so we
1316  * don't need extra locking on pegasus_count.
1317  */
1318 static void pegasus_dec_workqueue(void)
1319 {
1320         pegasus_count--;
1321         if (pegasus_count == 0) {
1322                 destroy_workqueue(pegasus_workqueue);
1323                 pegasus_workqueue = NULL;
1324         }
1325 }
1326
1327 static int pegasus_probe(struct usb_interface *intf,
1328                          const struct usb_device_id *id)
1329 {
1330         struct usb_device *dev = interface_to_usbdev(intf);
1331         struct net_device *net;
1332         pegasus_t *pegasus;
1333         int dev_index = id - pegasus_ids;
1334         int res = -ENOMEM;
1335
1336         if (pegasus_blacklisted(dev))
1337                 return -ENODEV;
1338
1339         if (pegasus_count == 0) {
1340                 pegasus_workqueue = create_singlethread_workqueue("pegasus");
1341                 if (!pegasus_workqueue)
1342                         return -ENOMEM;
1343         }
1344         pegasus_count++;
1345
1346         usb_get_dev(dev);
1347
1348         net = alloc_etherdev(sizeof(struct pegasus));
1349         if (!net) {
1350                 dev_err(&intf->dev, "can't allocate %s\n", "device");
1351                 goto out;
1352         }
1353
1354         pegasus = netdev_priv(net);
1355         pegasus->dev_index = dev_index;
1356         init_waitqueue_head(&pegasus->ctrl_wait);
1357
1358         if (!alloc_urbs(pegasus)) {
1359                 dev_err(&intf->dev, "can't allocate %s\n", "urbs");
1360                 goto out1;
1361         }
1362
1363         tasklet_init(&pegasus->rx_tl, rx_fixup, (unsigned long) pegasus);
1364
1365         INIT_DELAYED_WORK(&pegasus->carrier_check, check_carrier);
1366
1367         pegasus->intf = intf;
1368         pegasus->usb = dev;
1369         pegasus->net = net;
1370
1371
1372         net->watchdog_timeo = PEGASUS_TX_TIMEOUT;
1373         net->netdev_ops = &pegasus_netdev_ops;
1374         SET_ETHTOOL_OPS(net, &ops);
1375         pegasus->mii.dev = net;
1376         pegasus->mii.mdio_read = mdio_read;
1377         pegasus->mii.mdio_write = mdio_write;
1378         pegasus->mii.phy_id_mask = 0x1f;
1379         pegasus->mii.reg_num_mask = 0x1f;
1380         spin_lock_init(&pegasus->rx_pool_lock);
1381         pegasus->msg_enable = netif_msg_init (msg_level, NETIF_MSG_DRV
1382                                 | NETIF_MSG_PROBE | NETIF_MSG_LINK);
1383
1384         pegasus->features = usb_dev_id[dev_index].private;
1385         get_interrupt_interval(pegasus);
1386         if (reset_mac(pegasus)) {
1387                 dev_err(&intf->dev, "can't reset MAC\n");
1388                 res = -EIO;
1389                 goto out2;
1390         }
1391         set_ethernet_addr(pegasus);
1392         fill_skb_pool(pegasus);
1393         if (pegasus->features & PEGASUS_II) {
1394                 dev_info(&intf->dev, "setup Pegasus II specific registers\n");
1395                 setup_pegasus_II(pegasus);
1396         }
1397         pegasus->phy = mii_phy_probe(pegasus);
1398         if (pegasus->phy == 0xff) {
1399                 dev_warn(&intf->dev, "can't locate MII phy, using default\n");
1400                 pegasus->phy = 1;
1401         }
1402         pegasus->mii.phy_id = pegasus->phy;
1403         usb_set_intfdata(intf, pegasus);
1404         SET_NETDEV_DEV(net, &intf->dev);
1405         pegasus_reset_wol(net);
1406         res = register_netdev(net);
1407         if (res)
1408                 goto out3;
1409         queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1410                                 CARRIER_CHECK_DELAY);
1411
1412         dev_info(&intf->dev, "%s, %s, %pM\n",
1413                  net->name,
1414                  usb_dev_id[dev_index].name,
1415                  net->dev_addr);
1416         return 0;
1417
1418 out3:
1419         usb_set_intfdata(intf, NULL);
1420         free_skb_pool(pegasus);
1421 out2:
1422         free_all_urbs(pegasus);
1423 out1:
1424         free_netdev(net);
1425 out:
1426         usb_put_dev(dev);
1427         pegasus_dec_workqueue();
1428         return res;
1429 }
1430
1431 static void pegasus_disconnect(struct usb_interface *intf)
1432 {
1433         struct pegasus *pegasus = usb_get_intfdata(intf);
1434
1435         usb_set_intfdata(intf, NULL);
1436         if (!pegasus) {
1437                 dev_dbg(&intf->dev, "unregistering non-bound device?\n");
1438                 return;
1439         }
1440
1441         pegasus->flags |= PEGASUS_UNPLUG;
1442         cancel_delayed_work(&pegasus->carrier_check);
1443         unregister_netdev(pegasus->net);
1444         usb_put_dev(interface_to_usbdev(intf));
1445         unlink_all_urbs(pegasus);
1446         free_all_urbs(pegasus);
1447         free_skb_pool(pegasus);
1448         if (pegasus->rx_skb != NULL) {
1449                 dev_kfree_skb(pegasus->rx_skb);
1450                 pegasus->rx_skb = NULL;
1451         }
1452         free_netdev(pegasus->net);
1453         pegasus_dec_workqueue();
1454 }
1455
1456 static int pegasus_suspend (struct usb_interface *intf, pm_message_t message)
1457 {
1458         struct pegasus *pegasus = usb_get_intfdata(intf);
1459
1460         netif_device_detach (pegasus->net);
1461         cancel_delayed_work(&pegasus->carrier_check);
1462         if (netif_running(pegasus->net)) {
1463                 usb_kill_urb(pegasus->rx_urb);
1464                 usb_kill_urb(pegasus->intr_urb);
1465         }
1466         return 0;
1467 }
1468
1469 static int pegasus_resume (struct usb_interface *intf)
1470 {
1471         struct pegasus *pegasus = usb_get_intfdata(intf);
1472
1473         netif_device_attach (pegasus->net);
1474         if (netif_running(pegasus->net)) {
1475                 pegasus->rx_urb->status = 0;
1476                 pegasus->rx_urb->actual_length = 0;
1477                 read_bulk_callback(pegasus->rx_urb);
1478
1479                 pegasus->intr_urb->status = 0;
1480                 pegasus->intr_urb->actual_length = 0;
1481                 intr_callback(pegasus->intr_urb);
1482         }
1483         queue_delayed_work(pegasus_workqueue, &pegasus->carrier_check,
1484                                 CARRIER_CHECK_DELAY);
1485         return 0;
1486 }
1487
1488 static const struct net_device_ops pegasus_netdev_ops = {
1489         .ndo_open =                     pegasus_open,
1490         .ndo_stop =                     pegasus_close,
1491         .ndo_do_ioctl =                 pegasus_ioctl,
1492         .ndo_start_xmit =               pegasus_start_xmit,
1493         .ndo_set_multicast_list =       pegasus_set_multicast,
1494         .ndo_get_stats =                pegasus_netdev_stats,
1495         .ndo_tx_timeout =               pegasus_tx_timeout,
1496         .ndo_change_mtu =               eth_change_mtu,
1497         .ndo_set_mac_address =          eth_mac_addr,
1498         .ndo_validate_addr =            eth_validate_addr,
1499 };
1500
1501 static struct usb_driver pegasus_driver = {
1502         .name = driver_name,
1503         .probe = pegasus_probe,
1504         .disconnect = pegasus_disconnect,
1505         .id_table = pegasus_ids,
1506         .suspend = pegasus_suspend,
1507         .resume = pegasus_resume,
1508 };
1509
1510 static void __init parse_id(char *id)
1511 {
1512         unsigned int vendor_id=0, device_id=0, flags=0, i=0;
1513         char *token, *name=NULL;
1514
1515         if ((token = strsep(&id, ":")) != NULL)
1516                 name = token;
1517         /* name now points to a null terminated string*/
1518         if ((token = strsep(&id, ":")) != NULL)
1519                 vendor_id = simple_strtoul(token, NULL, 16);
1520         if ((token = strsep(&id, ":")) != NULL)
1521                 device_id = simple_strtoul(token, NULL, 16);
1522         flags = simple_strtoul(id, NULL, 16);
1523         pr_info("%s: new device %s, vendor ID 0x%04x, device ID 0x%04x, flags: 0x%x\n",
1524                 driver_name, name, vendor_id, device_id, flags);
1525
1526         if (vendor_id > 0x10000 || vendor_id == 0)
1527                 return;
1528         if (device_id > 0x10000 || device_id == 0)
1529                 return;
1530
1531         for (i=0; usb_dev_id[i].name; i++);
1532         usb_dev_id[i].name = name;
1533         usb_dev_id[i].vendor = vendor_id;
1534         usb_dev_id[i].device = device_id;
1535         usb_dev_id[i].private = flags;
1536         pegasus_ids[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
1537         pegasus_ids[i].idVendor = vendor_id;
1538         pegasus_ids[i].idProduct = device_id;
1539 }
1540
1541 static int __init pegasus_init(void)
1542 {
1543         pr_info("%s: %s, " DRIVER_DESC "\n", driver_name, DRIVER_VERSION);
1544         if (devid)
1545                 parse_id(devid);
1546         return usb_register(&pegasus_driver);
1547 }
1548
1549 static void __exit pegasus_exit(void)
1550 {
1551         usb_deregister(&pegasus_driver);
1552 }
1553
1554 module_init(pegasus_init);
1555 module_exit(pegasus_exit);