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         void *buf;
 182         int ret;
 183
 184         buf = kmalloc(size, GFP_NOIO);
 185         if (!buf)
 186                 return -ENOMEM;
 187
 188         ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
 189                               RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
 190                               indx, 0, buf, size, 500);
 191         if (ret > 0 && ret <= size)
 192                 memcpy(data, buf, ret);
 193         kfree(buf);
 194         return ret;
 195 }
 196
 197 static int set_registers(rtl8150_t * dev, u16 indx, u16 size, const void *data)
 198 {
 199         void *buf;
 200         int ret;
 201
 202         buf = kmemdup(data, size, GFP_NOIO);
 203         if (!buf)
 204                 return -ENOMEM;
 205
 206         ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
 207                               RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
 208                               indx, 0, buf, size, 500);
 209         kfree(buf);
 210         return ret;
 211 }
 212
 213 static void ctrl_callback(struct urb *urb)
 214 {
 215         rtl8150_t *dev;
 216         int status = urb->status;
 217
 218         switch (status) {
 219         case 0:
 220                 break;
 221         case -EINPROGRESS:
 222                 break;
 223         case -ENOENT:
 224                 break;
 225         default:
 226                 if (printk_ratelimit())
 227                         dev_warn(&urb->dev->dev, "ctrl urb status %d\n", status);
 228         }
 229         dev = urb->context;
 230         clear_bit(RX_REG_SET, &dev->flags);
 231 }
 232
 233 static int async_set_registers(rtl8150_t * dev, u16 indx, u16 size)
 234 {
 235         int ret;
 236
 237         if (test_bit(RX_REG_SET, &dev->flags))
 238                 return -EAGAIN;
 239
 240         dev->dr.bRequestType = RTL8150_REQT_WRITE;
 241         dev->dr.bRequest = RTL8150_REQ_SET_REGS;
 242         dev->dr.wValue = cpu_to_le16(indx);
 243         dev->dr.wIndex = 0;
 244         dev->dr.wLength = cpu_to_le16(size);
 245         dev->ctrl_urb->transfer_buffer_length = size;
 246         usb_fill_control_urb(dev->ctrl_urb, dev->udev,
 247                          usb_sndctrlpipe(dev->udev, 0), (char *) &dev->dr,
 248                          &dev->rx_creg, size, ctrl_callback, dev);
 249         if ((ret = usb_submit_urb(dev->ctrl_urb, GFP_ATOMIC))) {
 250                 if (ret == -ENODEV)
 251                         netif_device_detach(dev->netdev);
 252                 err("control request submission failed: %d", ret);
 253         } else
 254                 set_bit(RX_REG_SET, &dev->flags);
 255
 256         return ret;
 257 }
 258
 259 static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
 260 {
 261         int i;
 262         u8 data[3], tmp;
 263
 264         data[0] = phy;
 265         data[1] = data[2] = 0;
 266         tmp = indx | PHY_READ | PHY_GO;
 267         i = 0;
 268
 269         set_registers(dev, PHYADD, sizeof(data), data);
 270         set_registers(dev, PHYCNT, 1, &tmp);
 271         do {
 272                 get_registers(dev, PHYCNT, 1, data);
 273         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 274
 275         if (i <= MII_TIMEOUT) {
 276                 get_registers(dev, PHYDAT, 2, data);
 277                 *reg = data[0] | (data[1] << 8);
 278                 return 0;
 279         } else
 280                 return 1;
 281 }
 282
 283 static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
 284 {
 285         int i;
 286         u8 data[3], tmp;
 287
 288         data[0] = phy;
 289         data[1] = reg & 0xff;
 290         data[2] = (reg >> 8) & 0xff;
 291         tmp = indx | PHY_WRITE | PHY_GO;
 292         i = 0;
 293
 294         set_registers(dev, PHYADD, sizeof(data), data);
 295         set_registers(dev, PHYCNT, 1, &tmp);
 296         do {
 297                 get_registers(dev, PHYCNT, 1, data);
 298         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 299
 300         if (i <= MII_TIMEOUT)
 301                 return 0;
 302         else
 303                 return 1;
 304 }
 305
 306 static inline void set_ethernet_addr(rtl8150_t * dev)
 307 {
 308         u8 node_id[6];
 309
 310         get_registers(dev, IDR, sizeof(node_id), node_id);
 311         memcpy(dev->netdev->dev_addr, node_id, sizeof(node_id));
 312 }
 313
 314 static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
 315 {
 316         struct sockaddr *addr = p;
 317         rtl8150_t *dev = netdev_priv(netdev);
 318
 319         if (netif_running(netdev))
 320                 return -EBUSY;
 321
 322         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 323         dbg("%s: Setting MAC address to %pM\n", netdev->name, netdev->dev_addr);
 324         /* Set the IDR registers. */
 325         set_registers(dev, IDR, netdev->addr_len, netdev->dev_addr);
 326 #ifdef EEPROM_WRITE
 327         {
 328         int i;
 329         u8 cr;
 330         /* Get the CR contents. */
 331         get_registers(dev, CR, 1, &cr);
 332         /* Set the WEPROM bit (eeprom write enable). */
 333         cr |= 0x20;
 334         set_registers(dev, CR, 1, &cr);
 335         /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
 336            so we need to split them up. */
 337         for (i = 0; i * 2 < netdev->addr_len; i++) {
 338                 set_registers(dev, IDR_EEPROM + (i * 2), 2,
 339                 netdev->dev_addr + (i * 2));
 340         }
 341         /* Clear the WEPROM bit (preventing accidental eeprom writes). */
 342         cr &= 0xdf;
 343         set_registers(dev, CR, 1, &cr);
 344         }
 345 #endif
 346         return 0;
 347 }
 348
 349 static int rtl8150_reset(rtl8150_t * dev)
 350 {
 351         u8 data = 0x10;
 352         int i = HZ;
 353
 354         set_registers(dev, CR, 1, &data);
 355         do {
 356                 get_registers(dev, CR, 1, &data);
 357         } while ((data & 0x10) && --i);
 358
 359         return (i > 0) ? 1 : 0;
 360 }
 361
 362 static int alloc_all_urbs(rtl8150_t * dev)
 363 {
 364         dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 365         if (!dev->rx_urb)
 366                 return 0;
 367         dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 368         if (!dev->tx_urb) {
 369                 usb_free_urb(dev->rx_urb);
 370                 return 0;
 371         }
 372         dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
 373         if (!dev->intr_urb) {
 374                 usb_free_urb(dev->rx_urb);
 375                 usb_free_urb(dev->tx_urb);
 376                 return 0;
 377         }
 378         dev->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
 379         if (!dev->ctrl_urb) {
 380                 usb_free_urb(dev->rx_urb);
 381                 usb_free_urb(dev->tx_urb);
 382                 usb_free_urb(dev->intr_urb);
 383                 return 0;
 384         }
 385
 386         return 1;
 387 }
 388
 389 static void free_all_urbs(rtl8150_t * dev)
 390 {
 391         usb_free_urb(dev->rx_urb);
 392         usb_free_urb(dev->tx_urb);
 393         usb_free_urb(dev->intr_urb);
 394         usb_free_urb(dev->ctrl_urb);
 395 }
 396
 397 static void unlink_all_urbs(rtl8150_t * dev)
 398 {
 399         usb_kill_urb(dev->rx_urb);
 400         usb_kill_urb(dev->tx_urb);
 401         usb_kill_urb(dev->intr_urb);
 402         usb_kill_urb(dev->ctrl_urb);
 403 }
 404
 405 static inline struct sk_buff *pull_skb(rtl8150_t *dev)
 406 {
 407         struct sk_buff *skb;
 408         int i;
 409
 410         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 411                 if (dev->rx_skb_pool[i]) {
 412                         skb = dev->rx_skb_pool[i];
 413                         dev->rx_skb_pool[i] = NULL;
 414                         return skb;
 415                 }
 416         }
 417         return NULL;
 418 }
 419
 420 static void read_bulk_callback(struct urb *urb)
 421 {
 422         rtl8150_t *dev;
 423         unsigned pkt_len, res;
 424         struct sk_buff *skb;
 425         struct net_device *netdev;
 426         u16 rx_stat;
 427         int status = urb->status;
 428         int result;
 429
 430         dev = urb->context;
 431         if (!dev)
 432                 return;
 433         if (test_bit(RTL8150_UNPLUG, &dev->flags))
 434                 return;
 435         netdev = dev->netdev;
 436         if (!netif_device_present(netdev))
 437                 return;
 438
 439         switch (status) {
 440         case 0:
 441                 break;
 442         case -ENOENT:
 443                 return; /* the urb is in unlink state */
 444         case -ETIME:
 445                 if (printk_ratelimit())
 446                         dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
 447                 goto goon;
 448         default:
 449                 if (printk_ratelimit())
 450                         dev_warn(&urb->dev->dev, "Rx status %d\n", status);
 451                 goto goon;
 452         }
 453
 454         if (!dev->rx_skb)
 455                 goto resched;
 456         /* protect against short packets (tell me why we got some?!?) */
 457         if (urb->actual_length < 4)
 458                 goto goon;
 459
 460         res = urb->actual_length;
 461         rx_stat = le16_to_cpu(*(__le16 *)(urb->transfer_buffer + res - 4));
 462         pkt_len = res - 4;
 463
 464         skb_put(dev->rx_skb, pkt_len);
 465         dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
 466         netif_rx(dev->rx_skb);
 467         netdev->stats.rx_packets++;
 468         netdev->stats.rx_bytes += pkt_len;
 469
 470         spin_lock(&dev->rx_pool_lock);
 471         skb = pull_skb(dev);
 472         spin_unlock(&dev->rx_pool_lock);
 473         if (!skb)
 474                 goto resched;
 475
 476         dev->rx_skb = skb;
 477 goon:
 478         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 479                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 480         result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
 481         if (result == -ENODEV)
 482                 netif_device_detach(dev->netdev);
 483         else if (result) {
 484                 set_bit(RX_URB_FAIL, &dev->flags);
 485                 goto resched;
 486         } else {
 487                 clear_bit(RX_URB_FAIL, &dev->flags);
 488         }
 489
 490         return;
 491 resched:
 492         tasklet_schedule(&dev->tl);
 493 }
 494
 495 static void write_bulk_callback(struct urb *urb)
 496 {
 497         rtl8150_t *dev;
 498         int status = urb->status;
 499
 500         dev = urb->context;
 501         if (!dev)
 502                 return;
 503         dev_kfree_skb_irq(dev->tx_skb);
 504         if (!netif_device_present(dev->netdev))
 505                 return;
 506         if (status)
 507                 dev_info(&urb->dev->dev, "%s: Tx status %d\n",
 508                          dev->netdev->name, status);
 509         dev->netdev->trans_start = jiffies;
 510         netif_wake_queue(dev->netdev);
 511 }
 512
 513 static void intr_callback(struct urb *urb)
 514 {
 515         rtl8150_t *dev;
 516         __u8 *d;
 517         int status = urb->status;
 518         int res;
 519
 520         dev = urb->context;
 521         if (!dev)
 522                 return;
 523         switch (status) {
 524         case 0:                 /* success */
 525                 break;
 526         case -ECONNRESET:       /* unlink */
 527         case -ENOENT:
 528         case -ESHUTDOWN:
 529                 return;
 530         /* -EPIPE:  should clear the halt */
 531         default:
 532                 dev_info(&urb->dev->dev, "%s: intr status %d\n",
 533                          dev->netdev->name, status);
 534                 goto resubmit;
 535         }
 536
 537         d = urb->transfer_buffer;
 538         if (d[0] & TSR_ERRORS) {
 539                 dev->netdev->stats.tx_errors++;
 540                 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
 541                         dev->netdev->stats.tx_aborted_errors++;
 542                 if (d[INT_TSR] & TSR_LCOL)
 543                         dev->netdev->stats.tx_window_errors++;
 544                 if (d[INT_TSR] & TSR_LOSS_CRS)
 545                         dev->netdev->stats.tx_carrier_errors++;
 546         }
 547         /* Report link status changes to the network stack */
 548         if ((d[INT_MSR] & MSR_LINK) == 0) {
 549                 if (netif_carrier_ok(dev->netdev)) {
 550                         netif_carrier_off(dev->netdev);
 551                         dbg("%s: LINK LOST\n", __func__);
 552                 }
 553         } else {
 554                 if (!netif_carrier_ok(dev->netdev)) {
 555                         netif_carrier_on(dev->netdev);
 556                         dbg("%s: LINK CAME BACK\n", __func__);
 557                 }
 558         }
 559
 560 resubmit:
 561         res = usb_submit_urb (urb, GFP_ATOMIC);
 562         if (res == -ENODEV)
 563                 netif_device_detach(dev->netdev);
 564         else if (res)
 565                 err ("can't resubmit intr, %s-%s/input0, status %d",
 566                                 dev->udev->bus->bus_name,
 567                                 dev->udev->devpath, res);
 568 }
 569
 570 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
 571 {
 572         rtl8150_t *dev = usb_get_intfdata(intf);
 573
 574         netif_device_detach(dev->netdev);
 575
 576         if (netif_running(dev->netdev)) {
 577                 usb_kill_urb(dev->rx_urb);
 578                 usb_kill_urb(dev->intr_urb);
 579         }
 580         return 0;
 581 }
 582
 583 static int rtl8150_resume(struct usb_interface *intf)
 584 {
 585         rtl8150_t *dev = usb_get_intfdata(intf);
 586
 587         netif_device_attach(dev->netdev);
 588         if (netif_running(dev->netdev)) {
 589                 dev->rx_urb->status = 0;
 590                 dev->rx_urb->actual_length = 0;
 591                 read_bulk_callback(dev->rx_urb);
 592
 593                 dev->intr_urb->status = 0;
 594                 dev->intr_urb->actual_length = 0;
 595                 intr_callback(dev->intr_urb);
 596         }
 597         return 0;
 598 }
 599
 600 /*
 601 **
 602 **      network related part of the code
 603 **
 604 */
 605
 606 static void fill_skb_pool(rtl8150_t *dev)
 607 {
 608         struct sk_buff *skb;
 609         int i;
 610
 611         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 612                 if (dev->rx_skb_pool[i])
 613                         continue;
 614                 skb = dev_alloc_skb(RTL8150_MTU + 2);
 615                 if (!skb) {
 616                         return;
 617                 }
 618                 skb_reserve(skb, 2);
 619                 dev->rx_skb_pool[i] = skb;
 620         }
 621 }
 622
 623 static void free_skb_pool(rtl8150_t *dev)
 624 {
 625         int i;
 626
 627         for (i = 0; i < RX_SKB_POOL_SIZE; i++)
 628                 if (dev->rx_skb_pool[i])
 629                         dev_kfree_skb(dev->rx_skb_pool[i]);
 630 }
 631
 632 static void rx_fixup(unsigned long data)
 633 {
 634         struct rtl8150 *dev = (struct rtl8150 *)data;
 635         struct sk_buff *skb;
 636         int status;
 637
 638         spin_lock_irq(&dev->rx_pool_lock);
 639         fill_skb_pool(dev);
 640         spin_unlock_irq(&dev->rx_pool_lock);
 641         if (test_bit(RX_URB_FAIL, &dev->flags))
 642                 if (dev->rx_skb)
 643                         goto try_again;
 644         spin_lock_irq(&dev->rx_pool_lock);
 645         skb = pull_skb(dev);
 646         spin_unlock_irq(&dev->rx_pool_lock);
 647         if (skb == NULL)
 648                 goto tlsched;
 649         dev->rx_skb = skb;
 650         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 651                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 652 try_again:
 653         status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
 654         if (status == -ENODEV) {
 655                 netif_device_detach(dev->netdev);
 656         } else if (status) {
 657                 set_bit(RX_URB_FAIL, &dev->flags);
 658                 goto tlsched;
 659         } else {
 660                 clear_bit(RX_URB_FAIL, &dev->flags);
 661         }
 662
 663         return;
 664 tlsched:
 665         tasklet_schedule(&dev->tl);
 666 }
 667
 668 static int enable_net_traffic(rtl8150_t * dev)
 669 {
 670         u8 cr, tcr, rcr, msr;
 671
 672         if (!rtl8150_reset(dev)) {
 673                 dev_warn(&dev->udev->dev, "device reset failed\n");
 674         }
 675         /* RCR bit7=1 attach Rx info at the end;  =0 HW CRC (which is broken) */
 676         rcr = 0x9e;
 677         dev->rx_creg = cpu_to_le16(rcr);
 678         tcr = 0xd8;
 679         cr = 0x0c;
 680         if (!(rcr & 0x80))
 681                 set_bit(RTL8150_HW_CRC, &dev->flags);
 682         set_registers(dev, RCR, 1, &rcr);
 683         set_registers(dev, TCR, 1, &tcr);
 684         set_registers(dev, CR, 1, &cr);
 685         get_registers(dev, MSR, 1, &msr);
 686
 687         return 0;
 688 }
 689
 690 static void disable_net_traffic(rtl8150_t * dev)
 691 {
 692         u8 cr;
 693
 694         get_registers(dev, CR, 1, &cr);
 695         cr &= 0xf3;
 696         set_registers(dev, CR, 1, &cr);
 697 }
 698
 699 static void rtl8150_tx_timeout(struct net_device *netdev)
 700 {
 701         rtl8150_t *dev = netdev_priv(netdev);
 702         dev_warn(&netdev->dev, "Tx timeout.\n");
 703         usb_unlink_urb(dev->tx_urb);
 704         netdev->stats.tx_errors++;
 705 }
 706
 707 static void rtl8150_set_multicast(struct net_device *netdev)
 708 {
 709         rtl8150_t *dev = netdev_priv(netdev);
 710         netif_stop_queue(netdev);
 711         if (netdev->flags & IFF_PROMISC) {
 712                 dev->rx_creg |= cpu_to_le16(0x0001);
 713                 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
 714         } else if (!netdev_mc_empty(netdev) ||
 715                    (netdev->flags & IFF_ALLMULTI)) {
 716                 dev->rx_creg &= cpu_to_le16(0xfffe);
 717                 dev->rx_creg |= cpu_to_le16(0x0002);
 718                 dev_info(&netdev->dev, "%s: allmulti set\n", netdev->name);
 719         } else {
 720                 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
 721                 dev->rx_creg &= cpu_to_le16(0x00fc);
 722         }
 723         async_set_registers(dev, RCR, 2);
 724         netif_wake_queue(netdev);
 725 }
 726
 727 static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb,
 728                                             struct net_device *netdev)
 729 {
 730         rtl8150_t *dev = netdev_priv(netdev);
 731         int count, res;
 732
 733         netif_stop_queue(netdev);
 734         count = (skb->len < 60) ? 60 : skb->len;
 735         count = (count & 0x3f) ? count : count + 1;
 736         dev->tx_skb = skb;
 737         usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
 738                       skb->data, count, write_bulk_callback, dev);
 739         if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
 740                 /* Can we get/handle EPIPE here? */
 741                 if (res == -ENODEV)
 742                         netif_device_detach(dev->netdev);
 743                 else {
 744                         dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
 745                         netdev->stats.tx_errors++;
 746                         netif_start_queue(netdev);
 747                 }
 748         } else {
 749                 netdev->stats.tx_packets++;
 750                 netdev->stats.tx_bytes += skb->len;
 751                 netdev->trans_start = jiffies;
 752         }
 753
 754         return NETDEV_TX_OK;
 755 }
 756
 757
 758 static void set_carrier(struct net_device *netdev)
 759 {
 760         rtl8150_t *dev = netdev_priv(netdev);
 761         short tmp;
 762
 763         get_registers(dev, CSCR, 2, &tmp);
 764         if (tmp & CSCR_LINK_STATUS)
 765                 netif_carrier_on(netdev);
 766         else
 767                 netif_carrier_off(netdev);
 768 }
 769
 770 static int rtl8150_open(struct net_device *netdev)
 771 {
 772         rtl8150_t *dev = netdev_priv(netdev);
 773         int res;
 774
 775         if (dev->rx_skb == NULL)
 776                 dev->rx_skb = pull_skb(dev);
 777         if (!dev->rx_skb)
 778                 return -ENOMEM;
 779
 780         set_registers(dev, IDR, 6, netdev->dev_addr);
 781
 782         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 783                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 784         if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
 785                 if (res == -ENODEV)
 786                         netif_device_detach(dev->netdev);
 787                 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
 788                 return res;
 789         }
 790         usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
 791                      dev->intr_buff, INTBUFSIZE, intr_callback,
 792                      dev, dev->intr_interval);
 793         if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
 794                 if (res == -ENODEV)
 795                         netif_device_detach(dev->netdev);
 796                 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
 797                 usb_kill_urb(dev->rx_urb);
 798                 return res;
 799         }
 800         enable_net_traffic(dev);
 801         set_carrier(netdev);
 802         netif_start_queue(netdev);
 803
 804         return res;
 805 }
 806
 807 static int rtl8150_close(struct net_device *netdev)
 808 {
 809         rtl8150_t *dev = netdev_priv(netdev);
 810         int res = 0;
 811
 812         netif_stop_queue(netdev);
 813         if (!test_bit(RTL8150_UNPLUG, &dev->flags))
 814                 disable_net_traffic(dev);
 815         unlink_all_urbs(dev);
 816
 817         return res;
 818 }
 819
 820 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
 821 {
 822         rtl8150_t *dev = netdev_priv(netdev);
 823
 824         strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
 825         strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
 826         usb_make_path(dev->udev, info->bus_info, sizeof info->bus_info);
 827 }
 828
 829 static int rtl8150_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
 830 {
 831         rtl8150_t *dev = netdev_priv(netdev);
 832         short lpa, bmcr;
 833
 834         ecmd->supported = (SUPPORTED_10baseT_Half |
 835                           SUPPORTED_10baseT_Full |
 836                           SUPPORTED_100baseT_Half |
 837                           SUPPORTED_100baseT_Full |
 838                           SUPPORTED_Autoneg |
 839                           SUPPORTED_TP | SUPPORTED_MII);
 840         ecmd->port = PORT_TP;
 841         ecmd->transceiver = XCVR_INTERNAL;
 842         ecmd->phy_address = dev->phy;
 843         get_registers(dev, BMCR, 2, &bmcr);
 844         get_registers(dev, ANLP, 2, &lpa);
 845         if (bmcr & BMCR_ANENABLE) {
 846                 u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ?
 847                              SPEED_100 : SPEED_10);
 848                 ethtool_cmd_speed_set(ecmd, speed);
 849                 ecmd->autoneg = AUTONEG_ENABLE;
 850                 if (speed == SPEED_100)
 851                         ecmd->duplex = (lpa & LPA_100FULL) ?
 852                             DUPLEX_FULL : DUPLEX_HALF;
 853                 else
 854                         ecmd->duplex = (lpa & LPA_10FULL) ?
 855                             DUPLEX_FULL : DUPLEX_HALF;
 856         } else {
 857                 ecmd->autoneg = AUTONEG_DISABLE;
 858                 ethtool_cmd_speed_set(ecmd, ((bmcr & BMCR_SPEED100) ?
 859                                              SPEED_100 : SPEED_10));
 860                 ecmd->duplex = (bmcr & BMCR_FULLDPLX) ?
 861                     DUPLEX_FULL : DUPLEX_HALF;
 862         }
 863         return 0;
 864 }
 865
 866 static const struct ethtool_ops ops = {
 867         .get_drvinfo = rtl8150_get_drvinfo,
 868         .get_settings = rtl8150_get_settings,
 869         .get_link = ethtool_op_get_link
 870 };
 871
 872 static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 873 {
 874         rtl8150_t *dev = netdev_priv(netdev);
 875         u16 *data = (u16 *) & rq->ifr_ifru;
 876         int res = 0;
 877
 878         switch (cmd) {
 879         case SIOCDEVPRIVATE:
 880                 data[0] = dev->phy;
 881         case SIOCDEVPRIVATE + 1:
 882                 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
 883                 break;
 884         case SIOCDEVPRIVATE + 2:
 885                 if (!capable(CAP_NET_ADMIN))
 886                         return -EPERM;
 887                 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
 888                 break;
 889         default:
 890                 res = -EOPNOTSUPP;
 891         }
 892
 893         return res;
 894 }
 895
 896 static const struct net_device_ops rtl8150_netdev_ops = {
 897         .ndo_open               = rtl8150_open,
 898         .ndo_stop               = rtl8150_close,
 899         .ndo_do_ioctl           = rtl8150_ioctl,
 900         .ndo_start_xmit         = rtl8150_start_xmit,
 901         .ndo_tx_timeout         = rtl8150_tx_timeout,
 902         .ndo_set_rx_mode        = rtl8150_set_multicast,
 903         .ndo_set_mac_address    = rtl8150_set_mac_address,
 904
 905         .ndo_change_mtu         = eth_change_mtu,
 906         .ndo_validate_addr      = eth_validate_addr,
 907 };
 908
 909 static int rtl8150_probe(struct usb_interface *intf,
 910                          const struct usb_device_id *id)
 911 {
 912         struct usb_device *udev = interface_to_usbdev(intf);
 913         rtl8150_t *dev;
 914         struct net_device *netdev;
 915
 916         netdev = alloc_etherdev(sizeof(rtl8150_t));
 917         if (!netdev) {
 918                 err("Out of memory");
 919                 return -ENOMEM;
 920         }
 921
 922         dev = netdev_priv(netdev);
 923
 924         dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
 925         if (!dev->intr_buff) {
 926                 free_netdev(netdev);
 927                 return -ENOMEM;
 928         }
 929
 930         tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
 931         spin_lock_init(&dev->rx_pool_lock);
 932
 933         dev->udev = udev;
 934         dev->netdev = netdev;
 935         netdev->netdev_ops = &rtl8150_netdev_ops;
 936         netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
 937         SET_ETHTOOL_OPS(netdev, &ops);
 938         dev->intr_interval = 100;       /* 100ms */
 939
 940         if (!alloc_all_urbs(dev)) {
 941                 err("out of memory");
 942                 goto out;
 943         }
 944         if (!rtl8150_reset(dev)) {
 945                 err("couldn't reset the device");
 946                 goto out1;
 947         }
 948         fill_skb_pool(dev);
 949         set_ethernet_addr(dev);
 950
 951         usb_set_intfdata(intf, dev);
 952         SET_NETDEV_DEV(netdev, &intf->dev);
 953         if (register_netdev(netdev) != 0) {
 954                 err("couldn't register the device");
 955                 goto out2;
 956         }
 957
 958         dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
 959
 960         return 0;
 961
 962 out2:
 963         usb_set_intfdata(intf, NULL);
 964         free_skb_pool(dev);
 965 out1:
 966         free_all_urbs(dev);
 967 out:
 968         kfree(dev->intr_buff);
 969         free_netdev(netdev);
 970         return -EIO;
 971 }
 972
 973 static void rtl8150_disconnect(struct usb_interface *intf)
 974 {
 975         rtl8150_t *dev = usb_get_intfdata(intf);
 976
 977         usb_set_intfdata(intf, NULL);
 978         if (dev) {
 979                 set_bit(RTL8150_UNPLUG, &dev->flags);
 980                 tasklet_kill(&dev->tl);
 981                 unregister_netdev(dev->netdev);
 982                 unlink_all_urbs(dev);
 983                 free_all_urbs(dev);
 984                 free_skb_pool(dev);
 985                 if (dev->rx_skb)
 986                         dev_kfree_skb(dev->rx_skb);
 987                 kfree(dev->intr_buff);
 988                 free_netdev(dev->netdev);
 989         }
 990 }
 991
 992 static struct usb_driver rtl8150_driver = {
 993         .name           = driver_name,
 994         .probe          = rtl8150_probe,
 995         .disconnect     = rtl8150_disconnect,
 996         .id_table       = rtl8150_table,
 997         .suspend        = rtl8150_suspend,
 998         .resume         = rtl8150_resume
 999 };
1000
1001 static int __init usb_rtl8150_init(void)
1002 {
1003         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1004                DRIVER_DESC "\n");
1005         return usb_register(&rtl8150_driver);
1006 }
1007
1008 static void __exit usb_rtl8150_exit(void)
1009 {
1010         usb_deregister(&rtl8150_driver);
1011 }
1012
1013 module_init(usb_rtl8150_init);
1014 module_exit(usb_rtl8150_exit);
1015
1016 MODULE_AUTHOR(DRIVER_AUTHOR);
1017 MODULE_DESCRIPTION(DRIVER_DESC);
1018 MODULE_LICENSE("GPL");