Pileus Git - ~andy/linux/blob - drivers/net/usb/rtl8150.c

   1 /*
   2  *  Copyright (c) 2002 Petko Manolov (petkan@users.sourceforge.net)
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * version 2 as published by the Free Software Foundation.
   7  */
   8
   9 #include <linux/init.h>
  10 #include <linux/signal.h>
  11 #include <linux/slab.h>
  12 #include <linux/module.h>
  13 #include <linux/netdevice.h>
  14 #include <linux/etherdevice.h>
  15 #include <linux/mii.h>
  16 #include <linux/ethtool.h>
  17 #include <linux/usb.h>
  18 #include <asm/uaccess.h>
  19
  20 /* Version Information */
  21 #define DRIVER_VERSION "v0.6.2 (2004/08/27)"
  22 #define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>"
  23 #define DRIVER_DESC "rtl8150 based usb-ethernet driver"
  24
  25 #define IDR                     0x0120
  26 #define MAR                     0x0126
  27 #define CR                      0x012e
  28 #define TCR                     0x012f
  29 #define RCR                     0x0130
  30 #define TSR                     0x0132
  31 #define RSR                     0x0133
  32 #define CON0                    0x0135
  33 #define CON1                    0x0136
  34 #define MSR                     0x0137
  35 #define PHYADD                  0x0138
  36 #define PHYDAT                  0x0139
  37 #define PHYCNT                  0x013b
  38 #define GPPC                    0x013d
  39 #define BMCR                    0x0140
  40 #define BMSR                    0x0142
  41 #define ANAR                    0x0144
  42 #define ANLP                    0x0146
  43 #define AER                     0x0148
  44 #define CSCR                    0x014C  /* This one has the link status */
  45 #define CSCR_LINK_STATUS        (1 << 3)
  46
  47 #define IDR_EEPROM              0x1202
  48
  49 #define PHY_READ                0
  50 #define PHY_WRITE               0x20
  51 #define PHY_GO                  0x40
  52
  53 #define MII_TIMEOUT             10
  54 #define INTBUFSIZE              8
  55
  56 #define RTL8150_REQT_READ       0xc0
  57 #define RTL8150_REQT_WRITE      0x40
  58 #define RTL8150_REQ_GET_REGS    0x05
  59 #define RTL8150_REQ_SET_REGS    0x05
  60
  61
  62 /* Transmit status register errors */
  63 #define TSR_ECOL                (1<<5)
  64 #define TSR_LCOL                (1<<4)
  65 #define TSR_LOSS_CRS            (1<<3)
  66 #define TSR_JBR                 (1<<2)
  67 #define TSR_ERRORS              (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
  68 /* Receive status register errors */
  69 #define RSR_CRC                 (1<<2)
  70 #define RSR_FAE                 (1<<1)
  71 #define RSR_ERRORS              (RSR_CRC | RSR_FAE)
  72
  73 /* Media status register definitions */
  74 #define MSR_DUPLEX              (1<<4)
  75 #define MSR_SPEED               (1<<3)
  76 #define MSR_LINK                (1<<2)
  77
  78 /* Interrupt pipe data */
  79 #define INT_TSR                 0x00
  80 #define INT_RSR                 0x01
  81 #define INT_MSR                 0x02
  82 #define INT_WAKSR               0x03
  83 #define INT_TXOK_CNT            0x04
  84 #define INT_RXLOST_CNT          0x05
  85 #define INT_CRERR_CNT           0x06
  86 #define INT_COL_CNT             0x07
  87
  88 /* Transmit status register errors */
  89 #define TSR_ECOL                (1<<5)
  90 #define TSR_LCOL                (1<<4)
  91 #define TSR_LOSS_CRS            (1<<3)
  92 #define TSR_JBR                 (1<<2)
  93 #define TSR_ERRORS              (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
  94 /* Receive status register errors */
  95 #define RSR_CRC                 (1<<2)
  96 #define RSR_FAE                 (1<<1)
  97 #define RSR_ERRORS              (RSR_CRC | RSR_FAE)
  98
  99 /* Media status register definitions */
 100 #define MSR_DUPLEX              (1<<4)
 101 #define MSR_SPEED               (1<<3)
 102 #define MSR_LINK                (1<<2)
 103
 104 /* Interrupt pipe data */
 105 #define INT_TSR                 0x00
 106 #define INT_RSR                 0x01
 107 #define INT_MSR                 0x02
 108 #define INT_WAKSR               0x03
 109 #define INT_TXOK_CNT            0x04
 110 #define INT_RXLOST_CNT          0x05
 111 #define INT_CRERR_CNT           0x06
 112 #define INT_COL_CNT             0x07
 113
 114
 115 #define RTL8150_MTU             1540
 116 #define RTL8150_TX_TIMEOUT      (HZ)
 117 #define RX_SKB_POOL_SIZE        4
 118
 119 /* rtl8150 flags */
 120 #define RTL8150_HW_CRC          0
 121 #define RX_REG_SET              1
 122 #define RTL8150_UNPLUG          2
 123 #define RX_URB_FAIL             3
 124
 125 /* Define these values to match your device */
 126 #define VENDOR_ID_REALTEK               0x0bda
 127 #define VENDOR_ID_MELCO                 0x0411
 128 #define VENDOR_ID_MICRONET              0x3980
 129 #define VENDOR_ID_LONGSHINE             0x07b8
 130 #define VENDOR_ID_OQO                   0x1557
 131 #define VENDOR_ID_ZYXEL                 0x0586
 132
 133 #define PRODUCT_ID_RTL8150              0x8150
 134 #define PRODUCT_ID_LUAKTX               0x0012
 135 #define PRODUCT_ID_LCS8138TX            0x401a
 136 #define PRODUCT_ID_SP128AR              0x0003
 137 #define PRODUCT_ID_PRESTIGE             0x401a
 138
 139 #undef  EEPROM_WRITE
 140
 141 /* table of devices that work with this driver */
 142 static struct usb_device_id rtl8150_table[] = {
 143         {USB_DEVICE(VENDOR_ID_REALTEK, PRODUCT_ID_RTL8150)},
 144         {USB_DEVICE(VENDOR_ID_MELCO, PRODUCT_ID_LUAKTX)},
 145         {USB_DEVICE(VENDOR_ID_MICRONET, PRODUCT_ID_SP128AR)},
 146         {USB_DEVICE(VENDOR_ID_LONGSHINE, PRODUCT_ID_LCS8138TX)},
 147         {USB_DEVICE(VENDOR_ID_OQO, PRODUCT_ID_RTL8150)},
 148         {USB_DEVICE(VENDOR_ID_ZYXEL, PRODUCT_ID_PRESTIGE)},
 149         {}
 150 };
 151
 152 MODULE_DEVICE_TABLE(usb, rtl8150_table);
 153
 154 struct rtl8150 {
 155         unsigned long flags;
 156         struct usb_device *udev;
 157         struct tasklet_struct tl;
 158         struct net_device *netdev;
 159         struct urb *rx_urb, *tx_urb, *intr_urb, *ctrl_urb;
 160         struct sk_buff *tx_skb, *rx_skb;
 161         struct sk_buff *rx_skb_pool[RX_SKB_POOL_SIZE];
 162         spinlock_t rx_pool_lock;
 163         struct usb_ctrlrequest dr;
 164         int intr_interval;
 165         __le16 rx_creg;
 166         u8 *intr_buff;
 167         u8 phy;
 168 };
 169
 170 typedef struct rtl8150 rtl8150_t;
 171
 172 static const char driver_name [] = "rtl8150";
 173
 174 /*
 175 **
 176 **      device related part of the code
 177 **
 178 */
 179 static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
 180 {
 181         return usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
 182                                RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
 183                                indx, 0, data, size, 500);
 184 }
 185
 186 static int set_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
 187 {
 188         return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
 189                                RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
 190                                indx, 0, data, size, 500);
 191 }
 192
 193 static void ctrl_callback(struct urb *urb)
 194 {
 195         rtl8150_t *dev;
 196         int status = urb->status;
 197
 198         switch (status) {
 199         case 0:
 200                 break;
 201         case -EINPROGRESS:
 202                 break;
 203         case -ENOENT:
 204                 break;
 205         default:
 206                 if (printk_ratelimit())
 207                         dev_warn(&urb->dev->dev, "ctrl urb status %d\n", status);
 208         }
 209         dev = urb->context;
 210         clear_bit(RX_REG_SET, &dev->flags);
 211 }
 212
 213 static int async_set_registers(rtl8150_t * dev, u16 indx, u16 size)
 214 {
 215         int ret;
 216
 217         if (test_bit(RX_REG_SET, &dev->flags))
 218                 return -EAGAIN;
 219
 220         dev->dr.bRequestType = RTL8150_REQT_WRITE;
 221         dev->dr.bRequest = RTL8150_REQ_SET_REGS;
 222         dev->dr.wValue = cpu_to_le16(indx);
 223         dev->dr.wIndex = 0;
 224         dev->dr.wLength = cpu_to_le16(size);
 225         dev->ctrl_urb->transfer_buffer_length = size;
 226         usb_fill_control_urb(dev->ctrl_urb, dev->udev,
 227                          usb_sndctrlpipe(dev->udev, 0), (char *) &dev->dr,
 228                          &dev->rx_creg, size, ctrl_callback, dev);
 229         if ((ret = usb_submit_urb(dev->ctrl_urb, GFP_ATOMIC))) {
 230                 if (ret == -ENODEV)
 231                         netif_device_detach(dev->netdev);
 232                 err("control request submission failed: %d", ret);
 233         } else
 234                 set_bit(RX_REG_SET, &dev->flags);
 235
 236         return ret;
 237 }
 238
 239 static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
 240 {
 241         int i;
 242         u8 data[3], tmp;
 243
 244         data[0] = phy;
 245         data[1] = data[2] = 0;
 246         tmp = indx | PHY_READ | PHY_GO;
 247         i = 0;
 248
 249         set_registers(dev, PHYADD, sizeof(data), data);
 250         set_registers(dev, PHYCNT, 1, &tmp);
 251         do {
 252                 get_registers(dev, PHYCNT, 1, data);
 253         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 254
 255         if (i <= MII_TIMEOUT) {
 256                 get_registers(dev, PHYDAT, 2, data);
 257                 *reg = data[0] | (data[1] << 8);
 258                 return 0;
 259         } else
 260                 return 1;
 261 }
 262
 263 static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
 264 {
 265         int i;
 266         u8 data[3], tmp;
 267
 268         data[0] = phy;
 269         data[1] = reg & 0xff;
 270         data[2] = (reg >> 8) & 0xff;
 271         tmp = indx | PHY_WRITE | PHY_GO;
 272         i = 0;
 273
 274         set_registers(dev, PHYADD, sizeof(data), data);
 275         set_registers(dev, PHYCNT, 1, &tmp);
 276         do {
 277                 get_registers(dev, PHYCNT, 1, data);
 278         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 279
 280         if (i <= MII_TIMEOUT)
 281                 return 0;
 282         else
 283                 return 1;
 284 }
 285
 286 static inline void set_ethernet_addr(rtl8150_t * dev)
 287 {
 288         u8 node_id[6];
 289
 290         get_registers(dev, IDR, sizeof(node_id), node_id);
 291         memcpy(dev->netdev->dev_addr, node_id, sizeof(node_id));
 292 }
 293
 294 static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
 295 {
 296         struct sockaddr *addr = p;
 297         rtl8150_t *dev = netdev_priv(netdev);
 298
 299         if (netif_running(netdev))
 300                 return -EBUSY;
 301
 302         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 303         dbg("%s: Setting MAC address to %pM\n", netdev->name, netdev->dev_addr);
 304         /* Set the IDR registers. */
 305         set_registers(dev, IDR, netdev->addr_len, netdev->dev_addr);
 306 #ifdef EEPROM_WRITE
 307         {
 308         int i;
 309         u8 cr;
 310         /* Get the CR contents. */
 311         get_registers(dev, CR, 1, &cr);
 312         /* Set the WEPROM bit (eeprom write enable). */
 313         cr |= 0x20;
 314         set_registers(dev, CR, 1, &cr);
 315         /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
 316            so we need to split them up. */
 317         for (i = 0; i * 2 < netdev->addr_len; i++) {
 318                 set_registers(dev, IDR_EEPROM + (i * 2), 2,
 319                 netdev->dev_addr + (i * 2));
 320         }
 321         /* Clear the WEPROM bit (preventing accidental eeprom writes). */
 322         cr &= 0xdf;
 323         set_registers(dev, CR, 1, &cr);
 324         }
 325 #endif
 326         return 0;
 327 }
 328
 329 static int rtl8150_reset(rtl8150_t * dev)
 330 {
 331         u8 data = 0x10;
 332         int i = HZ;
 333
 334         set_registers(dev, CR, 1, &data);
 335         do {
 336                 get_registers(dev, CR, 1, &data);
 337         } while ((data & 0x10) && --i);
 338
 339         return (i > 0) ? 1 : 0;
 340 }
 341
 342 static int alloc_all_urbs(rtl8150_t * dev)
 343 {
 344         dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 345         if (!dev->rx_urb)
 346                 return 0;
 347         dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 348         if (!dev->tx_urb) {
 349                 usb_free_urb(dev->rx_urb);
 350                 return 0;
 351         }
 352         dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
 353         if (!dev->intr_urb) {
 354                 usb_free_urb(dev->rx_urb);
 355                 usb_free_urb(dev->tx_urb);
 356                 return 0;
 357         }
 358         dev->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
 359         if (!dev->ctrl_urb) {
 360                 usb_free_urb(dev->rx_urb);
 361                 usb_free_urb(dev->tx_urb);
 362                 usb_free_urb(dev->intr_urb);
 363                 return 0;
 364         }
 365
 366         return 1;
 367 }
 368
 369 static void free_all_urbs(rtl8150_t * dev)
 370 {
 371         usb_free_urb(dev->rx_urb);
 372         usb_free_urb(dev->tx_urb);
 373         usb_free_urb(dev->intr_urb);
 374         usb_free_urb(dev->ctrl_urb);
 375 }
 376
 377 static void unlink_all_urbs(rtl8150_t * dev)
 378 {
 379         usb_kill_urb(dev->rx_urb);
 380         usb_kill_urb(dev->tx_urb);
 381         usb_kill_urb(dev->intr_urb);
 382         usb_kill_urb(dev->ctrl_urb);
 383 }
 384
 385 static inline struct sk_buff *pull_skb(rtl8150_t *dev)
 386 {
 387         struct sk_buff *skb;
 388         int i;
 389
 390         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 391                 if (dev->rx_skb_pool[i]) {
 392                         skb = dev->rx_skb_pool[i];
 393                         dev->rx_skb_pool[i] = NULL;
 394                         return skb;
 395                 }
 396         }
 397         return NULL;
 398 }
 399
 400 static void read_bulk_callback(struct urb *urb)
 401 {
 402         rtl8150_t *dev;
 403         unsigned pkt_len, res;
 404         struct sk_buff *skb;
 405         struct net_device *netdev;
 406         u16 rx_stat;
 407         int status = urb->status;
 408         int result;
 409
 410         dev = urb->context;
 411         if (!dev)
 412                 return;
 413         if (test_bit(RTL8150_UNPLUG, &dev->flags))
 414                 return;
 415         netdev = dev->netdev;
 416         if (!netif_device_present(netdev))
 417                 return;
 418
 419         switch (status) {
 420         case 0:
 421                 break;
 422         case -ENOENT:
 423                 return; /* the urb is in unlink state */
 424         case -ETIME:
 425                 if (printk_ratelimit())
 426                         dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
 427                 goto goon;
 428         default:
 429                 if (printk_ratelimit())
 430                         dev_warn(&urb->dev->dev, "Rx status %d\n", status);
 431                 goto goon;
 432         }
 433
 434         if (!dev->rx_skb)
 435                 goto resched;
 436         /* protect against short packets (tell me why we got some?!?) */
 437         if (urb->actual_length < 4)
 438                 goto goon;
 439
 440         res = urb->actual_length;
 441         rx_stat = le16_to_cpu(*(__le16 *)(urb->transfer_buffer + res - 4));
 442         pkt_len = res - 4;
 443
 444         skb_put(dev->rx_skb, pkt_len);
 445         dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
 446         netif_rx(dev->rx_skb);
 447         netdev->stats.rx_packets++;
 448         netdev->stats.rx_bytes += pkt_len;
 449
 450         spin_lock(&dev->rx_pool_lock);
 451         skb = pull_skb(dev);
 452         spin_unlock(&dev->rx_pool_lock);
 453         if (!skb)
 454                 goto resched;
 455
 456         dev->rx_skb = skb;
 457 goon:
 458         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 459                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 460         result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
 461         if (result == -ENODEV)
 462                 netif_device_detach(dev->netdev);
 463         else if (result) {
 464                 set_bit(RX_URB_FAIL, &dev->flags);
 465                 goto resched;
 466         } else {
 467                 clear_bit(RX_URB_FAIL, &dev->flags);
 468         }
 469
 470         return;
 471 resched:
 472         tasklet_schedule(&dev->tl);
 473 }
 474
 475 static void write_bulk_callback(struct urb *urb)
 476 {
 477         rtl8150_t *dev;
 478         int status = urb->status;
 479
 480         dev = urb->context;
 481         if (!dev)
 482                 return;
 483         dev_kfree_skb_irq(dev->tx_skb);
 484         if (!netif_device_present(dev->netdev))
 485                 return;
 486         if (status)
 487                 dev_info(&urb->dev->dev, "%s: Tx status %d\n",
 488                          dev->netdev->name, status);
 489         dev->netdev->trans_start = jiffies;
 490         netif_wake_queue(dev->netdev);
 491 }
 492
 493 static void intr_callback(struct urb *urb)
 494 {
 495         rtl8150_t *dev;
 496         __u8 *d;
 497         int status = urb->status;
 498         int res;
 499
 500         dev = urb->context;
 501         if (!dev)
 502                 return;
 503         switch (status) {
 504         case 0:                 /* success */
 505                 break;
 506         case -ECONNRESET:       /* unlink */
 507         case -ENOENT:
 508         case -ESHUTDOWN:
 509                 return;
 510         /* -EPIPE:  should clear the halt */
 511         default:
 512                 dev_info(&urb->dev->dev, "%s: intr status %d\n",
 513                          dev->netdev->name, status);
 514                 goto resubmit;
 515         }
 516
 517         d = urb->transfer_buffer;
 518         if (d[0] & TSR_ERRORS) {
 519                 dev->netdev->stats.tx_errors++;
 520                 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
 521                         dev->netdev->stats.tx_aborted_errors++;
 522                 if (d[INT_TSR] & TSR_LCOL)
 523                         dev->netdev->stats.tx_window_errors++;
 524                 if (d[INT_TSR] & TSR_LOSS_CRS)
 525                         dev->netdev->stats.tx_carrier_errors++;
 526         }
 527         /* Report link status changes to the network stack */
 528         if ((d[INT_MSR] & MSR_LINK) == 0) {
 529                 if (netif_carrier_ok(dev->netdev)) {
 530                         netif_carrier_off(dev->netdev);
 531                         dbg("%s: LINK LOST\n", __func__);
 532                 }
 533         } else {
 534                 if (!netif_carrier_ok(dev->netdev)) {
 535                         netif_carrier_on(dev->netdev);
 536                         dbg("%s: LINK CAME BACK\n", __func__);
 537                 }
 538         }
 539
 540 resubmit:
 541         res = usb_submit_urb (urb, GFP_ATOMIC);
 542         if (res == -ENODEV)
 543                 netif_device_detach(dev->netdev);
 544         else if (res)
 545                 err ("can't resubmit intr, %s-%s/input0, status %d",
 546                                 dev->udev->bus->bus_name,
 547                                 dev->udev->devpath, res);
 548 }
 549
 550 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
 551 {
 552         rtl8150_t *dev = usb_get_intfdata(intf);
 553
 554         netif_device_detach(dev->netdev);
 555
 556         if (netif_running(dev->netdev)) {
 557                 usb_kill_urb(dev->rx_urb);
 558                 usb_kill_urb(dev->intr_urb);
 559         }
 560         return 0;
 561 }
 562
 563 static int rtl8150_resume(struct usb_interface *intf)
 564 {
 565         rtl8150_t *dev = usb_get_intfdata(intf);
 566
 567         netif_device_attach(dev->netdev);
 568         if (netif_running(dev->netdev)) {
 569                 dev->rx_urb->status = 0;
 570                 dev->rx_urb->actual_length = 0;
 571                 read_bulk_callback(dev->rx_urb);
 572
 573                 dev->intr_urb->status = 0;
 574                 dev->intr_urb->actual_length = 0;
 575                 intr_callback(dev->intr_urb);
 576         }
 577         return 0;
 578 }
 579
 580 /*
 581 **
 582 **      network related part of the code
 583 **
 584 */
 585
 586 static void fill_skb_pool(rtl8150_t *dev)
 587 {
 588         struct sk_buff *skb;
 589         int i;
 590
 591         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 592                 if (dev->rx_skb_pool[i])
 593                         continue;
 594                 skb = dev_alloc_skb(RTL8150_MTU + 2);
 595                 if (!skb) {
 596                         return;
 597                 }
 598                 skb_reserve(skb, 2);
 599                 dev->rx_skb_pool[i] = skb;
 600         }
 601 }
 602
 603 static void free_skb_pool(rtl8150_t *dev)
 604 {
 605         int i;
 606
 607         for (i = 0; i < RX_SKB_POOL_SIZE; i++)
 608                 if (dev->rx_skb_pool[i])
 609                         dev_kfree_skb(dev->rx_skb_pool[i]);
 610 }
 611
 612 static void rx_fixup(unsigned long data)
 613 {
 614         struct rtl8150 *dev = (struct rtl8150 *)data;
 615         struct sk_buff *skb;
 616         int status;
 617
 618         spin_lock_irq(&dev->rx_pool_lock);
 619         fill_skb_pool(dev);
 620         spin_unlock_irq(&dev->rx_pool_lock);
 621         if (test_bit(RX_URB_FAIL, &dev->flags))
 622                 if (dev->rx_skb)
 623                         goto try_again;
 624         spin_lock_irq(&dev->rx_pool_lock);
 625         skb = pull_skb(dev);
 626         spin_unlock_irq(&dev->rx_pool_lock);
 627         if (skb == NULL)
 628                 goto tlsched;
 629         dev->rx_skb = skb;
 630         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 631                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 632 try_again:
 633         status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
 634         if (status == -ENODEV) {
 635                 netif_device_detach(dev->netdev);
 636         } else if (status) {
 637                 set_bit(RX_URB_FAIL, &dev->flags);
 638                 goto tlsched;
 639         } else {
 640                 clear_bit(RX_URB_FAIL, &dev->flags);
 641         }
 642
 643         return;
 644 tlsched:
 645         tasklet_schedule(&dev->tl);
 646 }
 647
 648 static int enable_net_traffic(rtl8150_t * dev)
 649 {
 650         u8 cr, tcr, rcr, msr;
 651
 652         if (!rtl8150_reset(dev)) {
 653                 dev_warn(&dev->udev->dev, "device reset failed\n");
 654         }
 655         /* RCR bit7=1 attach Rx info at the end;  =0 HW CRC (which is broken) */
 656         rcr = 0x9e;
 657         dev->rx_creg = cpu_to_le16(rcr);
 658         tcr = 0xd8;
 659         cr = 0x0c;
 660         if (!(rcr & 0x80))
 661                 set_bit(RTL8150_HW_CRC, &dev->flags);
 662         set_registers(dev, RCR, 1, &rcr);
 663         set_registers(dev, TCR, 1, &tcr);
 664         set_registers(dev, CR, 1, &cr);
 665         get_registers(dev, MSR, 1, &msr);
 666
 667         return 0;
 668 }
 669
 670 static void disable_net_traffic(rtl8150_t * dev)
 671 {
 672         u8 cr;
 673
 674         get_registers(dev, CR, 1, &cr);
 675         cr &= 0xf3;
 676         set_registers(dev, CR, 1, &cr);
 677 }
 678
 679 static void rtl8150_tx_timeout(struct net_device *netdev)
 680 {
 681         rtl8150_t *dev = netdev_priv(netdev);
 682         dev_warn(&netdev->dev, "Tx timeout.\n");
 683         usb_unlink_urb(dev->tx_urb);
 684         netdev->stats.tx_errors++;
 685 }
 686
 687 static void rtl8150_set_multicast(struct net_device *netdev)
 688 {
 689         rtl8150_t *dev = netdev_priv(netdev);
 690         netif_stop_queue(netdev);
 691         if (netdev->flags & IFF_PROMISC) {
 692                 dev->rx_creg |= cpu_to_le16(0x0001);
 693                 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
 694         } else if (!netdev_mc_empty(netdev) ||
 695                    (netdev->flags & IFF_ALLMULTI)) {
 696                 dev->rx_creg &= cpu_to_le16(0xfffe);
 697                 dev->rx_creg |= cpu_to_le16(0x0002);
 698                 dev_info(&netdev->dev, "%s: allmulti set\n", netdev->name);
 699         } else {
 700                 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
 701                 dev->rx_creg &= cpu_to_le16(0x00fc);
 702         }
 703         async_set_registers(dev, RCR, 2);
 704         netif_wake_queue(netdev);
 705 }
 706
 707 static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb,
 708                                             struct net_device *netdev)
 709 {
 710         rtl8150_t *dev = netdev_priv(netdev);
 711         int count, res;
 712
 713         netif_stop_queue(netdev);
 714         count = (skb->len < 60) ? 60 : skb->len;
 715         count = (count & 0x3f) ? count : count + 1;
 716         dev->tx_skb = skb;
 717         usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
 718                       skb->data, count, write_bulk_callback, dev);
 719         if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
 720                 /* Can we get/handle EPIPE here? */
 721                 if (res == -ENODEV)
 722                         netif_device_detach(dev->netdev);
 723                 else {
 724                         dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
 725                         netdev->stats.tx_errors++;
 726                         netif_start_queue(netdev);
 727                 }
 728         } else {
 729                 netdev->stats.tx_packets++;
 730                 netdev->stats.tx_bytes += skb->len;
 731                 netdev->trans_start = jiffies;
 732         }
 733
 734         return NETDEV_TX_OK;
 735 }
 736
 737
 738 static void set_carrier(struct net_device *netdev)
 739 {
 740         rtl8150_t *dev = netdev_priv(netdev);
 741         short tmp;
 742
 743         get_registers(dev, CSCR, 2, &tmp);
 744         if (tmp & CSCR_LINK_STATUS)
 745                 netif_carrier_on(netdev);
 746         else
 747                 netif_carrier_off(netdev);
 748 }
 749
 750 static int rtl8150_open(struct net_device *netdev)
 751 {
 752         rtl8150_t *dev = netdev_priv(netdev);
 753         int res;
 754
 755         if (dev->rx_skb == NULL)
 756                 dev->rx_skb = pull_skb(dev);
 757         if (!dev->rx_skb)
 758                 return -ENOMEM;
 759
 760         set_registers(dev, IDR, 6, netdev->dev_addr);
 761
 762         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 763                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 764         if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
 765                 if (res == -ENODEV)
 766                         netif_device_detach(dev->netdev);
 767                 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
 768                 return res;
 769         }
 770         usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
 771                      dev->intr_buff, INTBUFSIZE, intr_callback,
 772                      dev, dev->intr_interval);
 773         if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
 774                 if (res == -ENODEV)
 775                         netif_device_detach(dev->netdev);
 776                 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
 777                 usb_kill_urb(dev->rx_urb);
 778                 return res;
 779         }
 780         enable_net_traffic(dev);
 781         set_carrier(netdev);
 782         netif_start_queue(netdev);
 783
 784         return res;
 785 }
 786
 787 static int rtl8150_close(struct net_device *netdev)
 788 {
 789         rtl8150_t *dev = netdev_priv(netdev);
 790         int res = 0;
 791
 792         netif_stop_queue(netdev);
 793         if (!test_bit(RTL8150_UNPLUG, &dev->flags))
 794                 disable_net_traffic(dev);
 795         unlink_all_urbs(dev);
 796
 797         return res;
 798 }
 799
 800 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
 801 {
 802         rtl8150_t *dev = netdev_priv(netdev);
 803
 804         strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
 805         strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
 806         usb_make_path(dev->udev, info->bus_info, sizeof info->bus_info);
 807 }
 808
 809 static int rtl8150_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
 810 {
 811         rtl8150_t *dev = netdev_priv(netdev);
 812         short lpa, bmcr;
 813
 814         ecmd->supported = (SUPPORTED_10baseT_Half |
 815                           SUPPORTED_10baseT_Full |
 816                           SUPPORTED_100baseT_Half |
 817                           SUPPORTED_100baseT_Full |
 818                           SUPPORTED_Autoneg |
 819                           SUPPORTED_TP | SUPPORTED_MII);
 820         ecmd->port = PORT_TP;
 821         ecmd->transceiver = XCVR_INTERNAL;
 822         ecmd->phy_address = dev->phy;
 823         get_registers(dev, BMCR, 2, &bmcr);
 824         get_registers(dev, ANLP, 2, &lpa);
 825         if (bmcr & BMCR_ANENABLE) {
 826                 u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ?
 827                              SPEED_100 : SPEED_10);
 828                 ethtool_cmd_speed_set(ecmd, speed);
 829                 ecmd->autoneg = AUTONEG_ENABLE;
 830                 if (speed == SPEED_100)
 831                         ecmd->duplex = (lpa & LPA_100FULL) ?
 832                             DUPLEX_FULL : DUPLEX_HALF;
 833                 else
 834                         ecmd->duplex = (lpa & LPA_10FULL) ?
 835                             DUPLEX_FULL : DUPLEX_HALF;
 836         } else {
 837                 ecmd->autoneg = AUTONEG_DISABLE;
 838                 ethtool_cmd_speed_set(ecmd, ((bmcr & BMCR_SPEED100) ?
 839                                              SPEED_100 : SPEED_10));
 840                 ecmd->duplex = (bmcr & BMCR_FULLDPLX) ?
 841                     DUPLEX_FULL : DUPLEX_HALF;
 842         }
 843         return 0;
 844 }
 845
 846 static const struct ethtool_ops ops = {
 847         .get_drvinfo = rtl8150_get_drvinfo,
 848         .get_settings = rtl8150_get_settings,
 849         .get_link = ethtool_op_get_link
 850 };
 851
 852 static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 853 {
 854         rtl8150_t *dev = netdev_priv(netdev);
 855         u16 *data = (u16 *) & rq->ifr_ifru;
 856         int res = 0;
 857
 858         switch (cmd) {
 859         case SIOCDEVPRIVATE:
 860                 data[0] = dev->phy;
 861         case SIOCDEVPRIVATE + 1:
 862                 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
 863                 break;
 864         case SIOCDEVPRIVATE + 2:
 865                 if (!capable(CAP_NET_ADMIN))
 866                         return -EPERM;
 867                 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
 868                 break;
 869         default:
 870                 res = -EOPNOTSUPP;
 871         }
 872
 873         return res;
 874 }
 875
 876 static const struct net_device_ops rtl8150_netdev_ops = {
 877         .ndo_open               = rtl8150_open,
 878         .ndo_stop               = rtl8150_close,
 879         .ndo_do_ioctl           = rtl8150_ioctl,
 880         .ndo_start_xmit         = rtl8150_start_xmit,
 881         .ndo_tx_timeout         = rtl8150_tx_timeout,
 882         .ndo_set_rx_mode        = rtl8150_set_multicast,
 883         .ndo_set_mac_address    = rtl8150_set_mac_address,
 884
 885         .ndo_change_mtu         = eth_change_mtu,
 886         .ndo_validate_addr      = eth_validate_addr,
 887 };
 888
 889 static int rtl8150_probe(struct usb_interface *intf,
 890                          const struct usb_device_id *id)
 891 {
 892         struct usb_device *udev = interface_to_usbdev(intf);
 893         rtl8150_t *dev;
 894         struct net_device *netdev;
 895
 896         netdev = alloc_etherdev(sizeof(rtl8150_t));
 897         if (!netdev) {
 898                 err("Out of memory");
 899                 return -ENOMEM;
 900         }
 901
 902         dev = netdev_priv(netdev);
 903
 904         dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
 905         if (!dev->intr_buff) {
 906                 free_netdev(netdev);
 907                 return -ENOMEM;
 908         }
 909
 910         tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
 911         spin_lock_init(&dev->rx_pool_lock);
 912
 913         dev->udev = udev;
 914         dev->netdev = netdev;
 915         netdev->netdev_ops = &rtl8150_netdev_ops;
 916         netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
 917         SET_ETHTOOL_OPS(netdev, &ops);
 918         dev->intr_interval = 100;       /* 100ms */
 919
 920         if (!alloc_all_urbs(dev)) {
 921                 err("out of memory");
 922                 goto out;
 923         }
 924         if (!rtl8150_reset(dev)) {
 925                 err("couldn't reset the device");
 926                 goto out1;
 927         }
 928         fill_skb_pool(dev);
 929         set_ethernet_addr(dev);
 930
 931         usb_set_intfdata(intf, dev);
 932         SET_NETDEV_DEV(netdev, &intf->dev);
 933         if (register_netdev(netdev) != 0) {
 934                 err("couldn't register the device");
 935                 goto out2;
 936         }
 937
 938         dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
 939
 940         return 0;
 941
 942 out2:
 943         usb_set_intfdata(intf, NULL);
 944         free_skb_pool(dev);
 945 out1:
 946         free_all_urbs(dev);
 947 out:
 948         kfree(dev->intr_buff);
 949         free_netdev(netdev);
 950         return -EIO;
 951 }
 952
 953 static void rtl8150_disconnect(struct usb_interface *intf)
 954 {
 955         rtl8150_t *dev = usb_get_intfdata(intf);
 956
 957         usb_set_intfdata(intf, NULL);
 958         if (dev) {
 959                 set_bit(RTL8150_UNPLUG, &dev->flags);
 960                 tasklet_kill(&dev->tl);
 961                 unregister_netdev(dev->netdev);
 962                 unlink_all_urbs(dev);
 963                 free_all_urbs(dev);
 964                 free_skb_pool(dev);
 965                 if (dev->rx_skb)
 966                         dev_kfree_skb(dev->rx_skb);
 967                 kfree(dev->intr_buff);
 968                 free_netdev(dev->netdev);
 969         }
 970 }
 971
 972 static struct usb_driver rtl8150_driver = {
 973         .name           = driver_name,
 974         .probe          = rtl8150_probe,
 975         .disconnect     = rtl8150_disconnect,
 976         .id_table       = rtl8150_table,
 977         .suspend        = rtl8150_suspend,
 978         .resume         = rtl8150_resume
 979 };
 980
 981 module_usb_driver(rtl8150_driver);
 982
 983 MODULE_AUTHOR(DRIVER_AUTHOR);
 984 MODULE_DESCRIPTION(DRIVER_DESC);
 985 MODULE_LICENSE("GPL");