drivers/usb/net/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/sched.h>
  10 #include <linux/init.h>
  11 #include <linux/signal.h>
  12 #include <linux/slab.h>
  13 #include <linux/module.h>
  14 #include <linux/netdevice.h>
  15 #include <linux/etherdevice.h>
  16 #include <linux/mii.h>
  17 #include <linux/ethtool.h>
  18 #include <linux/usb.h>
  19 #include <asm/uaccess.h>
  20
  21 /* Version Information */
  22 #define DRIVER_VERSION "v0.6.2 (2004/08/27)"
  23 #define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>"
  24 #define DRIVER_DESC "rtl8150 based usb-ethernet driver"
  25
  26 #define IDR                     0x0120
  27 #define MAR                     0x0126
  28 #define CR                      0x012e
  29 #define TCR                     0x012f
  30 #define RCR                     0x0130
  31 #define TSR                     0x0132
  32 #define RSR                     0x0133
  33 #define CON0                    0x0135
  34 #define CON1                    0x0136
  35 #define MSR                     0x0137
  36 #define PHYADD                  0x0138
  37 #define PHYDAT                  0x0139
  38 #define PHYCNT                  0x013b
  39 #define GPPC                    0x013d
  40 #define BMCR                    0x0140
  41 #define BMSR                    0x0142
  42 #define ANAR                    0x0144
  43 #define ANLP                    0x0146
  44 #define AER                     0x0148
  45 #define CSCR                    0x014C  /* This one has the link status */
  46 #define CSCR_LINK_STATUS        (1 << 3)
  47
  48 #define IDR_EEPROM              0x1202
  49
  50 #define PHY_READ                0
  51 #define PHY_WRITE               0x20
  52 #define PHY_GO                  0x40
  53
  54 #define MII_TIMEOUT             10
  55 #define INTBUFSIZE              8
  56
  57 #define RTL8150_REQT_READ       0xc0
  58 #define RTL8150_REQT_WRITE      0x40
  59 #define RTL8150_REQ_GET_REGS    0x05
  60 #define RTL8150_REQ_SET_REGS    0x05
  61
  62
  63 /* Transmit status register errors */
  64 #define TSR_ECOL                (1<<5)
  65 #define TSR_LCOL                (1<<4)
  66 #define TSR_LOSS_CRS            (1<<3)
  67 #define TSR_JBR                 (1<<2)
  68 #define TSR_ERRORS              (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
  69 /* Receive status register errors */
  70 #define RSR_CRC                 (1<<2)
  71 #define RSR_FAE                 (1<<1)
  72 #define RSR_ERRORS              (RSR_CRC | RSR_FAE)
  73
  74 /* Media status register definitions */
  75 #define MSR_DUPLEX              (1<<4)
  76 #define MSR_SPEED               (1<<3)
  77 #define MSR_LINK                (1<<2)
  78
  79 /* Interrupt pipe data */
  80 #define INT_TSR                 0x00
  81 #define INT_RSR                 0x01
  82 #define INT_MSR                 0x02
  83 #define INT_WAKSR               0x03
  84 #define INT_TXOK_CNT            0x04
  85 #define INT_RXLOST_CNT          0x05
  86 #define INT_CRERR_CNT           0x06
  87 #define INT_COL_CNT             0x07
  88
  89 /* Transmit status register errors */
  90 #define TSR_ECOL                (1<<5)
  91 #define TSR_LCOL                (1<<4)
  92 #define TSR_LOSS_CRS            (1<<3)
  93 #define TSR_JBR                 (1<<2)
  94 #define TSR_ERRORS              (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
  95 /* Receive status register errors */
  96 #define RSR_CRC                 (1<<2)
  97 #define RSR_FAE                 (1<<1)
  98 #define RSR_ERRORS              (RSR_CRC | RSR_FAE)
  99
 100 /* Media status register definitions */
 101 #define MSR_DUPLEX              (1<<4)
 102 #define MSR_SPEED               (1<<3)
 103 #define MSR_LINK                (1<<2)
 104
 105 /* Interrupt pipe data */
 106 #define INT_TSR                 0x00
 107 #define INT_RSR                 0x01
 108 #define INT_MSR                 0x02
 109 #define INT_WAKSR               0x03
 110 #define INT_TXOK_CNT            0x04
 111 #define INT_RXLOST_CNT          0x05
 112 #define INT_CRERR_CNT           0x06
 113 #define INT_COL_CNT             0x07
 114
 115
 116 #define RTL8150_MTU             1540
 117 #define RTL8150_TX_TIMEOUT      (HZ)
 118 #define RX_SKB_POOL_SIZE        4
 119
 120 /* rtl8150 flags */
 121 #define RTL8150_HW_CRC          0
 122 #define RX_REG_SET              1
 123 #define RTL8150_UNPLUG          2
 124 #define RX_URB_FAIL             3
 125
 126 /* Define these values to match your device */
 127 #define VENDOR_ID_REALTEK               0x0bda
 128 #define VENDOR_ID_MELCO                 0x0411
 129 #define VENDOR_ID_MICRONET              0x3980
 130 #define VENDOR_ID_LONGSHINE             0x07b8
 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_ZYXEL, PRODUCT_ID_PRESTIGE)},
 148         {}
 149 };
 150
 151 MODULE_DEVICE_TABLE(usb, rtl8150_table);
 152
 153 struct rtl8150 {
 154         unsigned long flags;
 155         struct usb_device *udev;
 156         struct tasklet_struct tl;
 157         struct net_device_stats stats;
 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 void fill_skb_pool(rtl8150_t *);
 173 static void free_skb_pool(rtl8150_t *);
 174 static inline struct sk_buff *pull_skb(rtl8150_t *);
 175 static void rtl8150_disconnect(struct usb_interface *intf);
 176 static int rtl8150_probe(struct usb_interface *intf,
 177                            const struct usb_device_id *id);
 178
 179 static const char driver_name [] = "rtl8150";
 180
 181 static struct usb_driver rtl8150_driver = {
 182         .name =         driver_name,
 183         .probe =        rtl8150_probe,
 184         .disconnect =   rtl8150_disconnect,
 185         .id_table =     rtl8150_table,
 186 };
 187
 188 /*
 189 **
 190 **      device related part of the code
 191 **
 192 */
 193 static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
 194 {
 195         return usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
 196                                RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
 197                                indx, 0, data, size, 500);
 198 }
 199
 200 static int set_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
 201 {
 202         return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
 203                                RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
 204                                indx, 0, data, size, 500);
 205 }
 206
 207 static void ctrl_callback(struct urb *urb, struct pt_regs *regs)
 208 {
 209         rtl8150_t *dev;
 210
 211         switch (urb->status) {
 212         case 0:
 213                 break;
 214         case -EINPROGRESS:
 215                 break;
 216         case -ENOENT:
 217                 break;
 218         default:
 219                 warn("ctrl urb status %d", urb->status);
 220         }
 221         dev = urb->context;
 222         clear_bit(RX_REG_SET, &dev->flags);
 223 }
 224
 225 static int async_set_registers(rtl8150_t * dev, u16 indx, u16 size)
 226 {
 227         int ret;
 228
 229         if (test_bit(RX_REG_SET, &dev->flags))
 230                 return -EAGAIN;
 231
 232         dev->dr.bRequestType = RTL8150_REQT_WRITE;
 233         dev->dr.bRequest = RTL8150_REQ_SET_REGS;
 234         dev->dr.wValue = cpu_to_le16(indx);
 235         dev->dr.wIndex = 0;
 236         dev->dr.wLength = cpu_to_le16(size);
 237         dev->ctrl_urb->transfer_buffer_length = size;
 238         usb_fill_control_urb(dev->ctrl_urb, dev->udev,
 239                          usb_sndctrlpipe(dev->udev, 0), (char *) &dev->dr,
 240                          &dev->rx_creg, size, ctrl_callback, dev);
 241         if ((ret = usb_submit_urb(dev->ctrl_urb, GFP_ATOMIC)))
 242                 err("control request submission failed: %d", ret);
 243         else
 244                 set_bit(RX_REG_SET, &dev->flags);
 245
 246         return ret;
 247 }
 248
 249 static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
 250 {
 251         int i;
 252         u8 data[3], tmp;
 253
 254         data[0] = phy;
 255         data[1] = data[2] = 0;
 256         tmp = indx | PHY_READ | PHY_GO;
 257         i = 0;
 258
 259         set_registers(dev, PHYADD, sizeof(data), data);
 260         set_registers(dev, PHYCNT, 1, &tmp);
 261         do {
 262                 get_registers(dev, PHYCNT, 1, data);
 263         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 264
 265         if (i < MII_TIMEOUT) {
 266                 get_registers(dev, PHYDAT, 2, data);
 267                 *reg = data[0] | (data[1] << 8);
 268                 return 0;
 269         } else
 270                 return 1;
 271 }
 272
 273 static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
 274 {
 275         int i;
 276         u8 data[3], tmp;
 277
 278         data[0] = phy;
 279         *(data + 1) = cpu_to_le16p(&reg);
 280         tmp = indx | PHY_WRITE | PHY_GO;
 281         i = 0;
 282
 283         set_registers(dev, PHYADD, sizeof(data), data);
 284         set_registers(dev, PHYCNT, 1, &tmp);
 285         do {
 286                 get_registers(dev, PHYCNT, 1, data);
 287         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 288
 289         if (i < MII_TIMEOUT)
 290                 return 0;
 291         else
 292                 return 1;
 293 }
 294
 295 static inline void set_ethernet_addr(rtl8150_t * dev)
 296 {
 297         u8 node_id[6];
 298
 299         get_registers(dev, IDR, sizeof(node_id), node_id);
 300         memcpy(dev->netdev->dev_addr, node_id, sizeof(node_id));
 301 }
 302
 303 static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
 304 {
 305         struct sockaddr *addr = p;
 306         rtl8150_t *dev = netdev_priv(netdev);
 307         int i;
 308
 309         if (netif_running(netdev))
 310                 return -EBUSY;
 311
 312         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 313         dbg("%s: Setting MAC address to ", netdev->name);
 314         for (i = 0; i < 5; i++)
 315                 dbg("%02X:", netdev->dev_addr[i]);
 316         dbg("%02X\n", netdev->dev_addr[i]);
 317         /* Set the IDR registers. */
 318         set_registers(dev, IDR, sizeof(netdev->dev_addr), netdev->dev_addr);
 319 #ifdef EEPROM_WRITE
 320         {
 321         u8 cr;
 322         /* Get the CR contents. */
 323         get_registers(dev, CR, 1, &cr);
 324         /* Set the WEPROM bit (eeprom write enable). */
 325         cr |= 0x20;
 326         set_registers(dev, CR, 1, &cr);
 327         /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
 328            so we need to split them up. */
 329         for (i = 0; i * 2 < netdev->addr_len; i++) {
 330                 set_registers(dev, IDR_EEPROM + (i * 2), 2,
 331                 netdev->dev_addr + (i * 2));
 332         }
 333         /* Clear the WEPROM bit (preventing accidental eeprom writes). */
 334         cr &= 0xdf;
 335         set_registers(dev, CR, 1, &cr);
 336         }
 337 #endif
 338         return 0;
 339 }
 340
 341 static int rtl8150_reset(rtl8150_t * dev)
 342 {
 343         u8 data = 0x10;
 344         int i = HZ;
 345
 346         set_registers(dev, CR, 1, &data);
 347         do {
 348                 get_registers(dev, CR, 1, &data);
 349         } while ((data & 0x10) && --i);
 350
 351         return (i > 0) ? 1 : 0;
 352 }
 353
 354 static int alloc_all_urbs(rtl8150_t * dev)
 355 {
 356         dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 357         if (!dev->rx_urb)
 358                 return 0;
 359         dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 360         if (!dev->tx_urb) {
 361                 usb_free_urb(dev->rx_urb);
 362                 return 0;
 363         }
 364         dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
 365         if (!dev->intr_urb) {
 366                 usb_free_urb(dev->rx_urb);
 367                 usb_free_urb(dev->tx_urb);
 368                 return 0;
 369         }
 370         dev->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
 371         if (!dev->intr_urb) {
 372                 usb_free_urb(dev->rx_urb);
 373                 usb_free_urb(dev->tx_urb);
 374                 usb_free_urb(dev->intr_urb);
 375                 return 0;
 376         }
 377
 378         return 1;
 379 }
 380
 381 static void free_all_urbs(rtl8150_t * dev)
 382 {
 383         usb_free_urb(dev->rx_urb);
 384         usb_free_urb(dev->tx_urb);
 385         usb_free_urb(dev->intr_urb);
 386         usb_free_urb(dev->ctrl_urb);
 387 }
 388
 389 static void unlink_all_urbs(rtl8150_t * dev)
 390 {
 391         usb_kill_urb(dev->rx_urb);
 392         usb_kill_urb(dev->tx_urb);
 393         usb_kill_urb(dev->intr_urb);
 394         usb_kill_urb(dev->ctrl_urb);
 395 }
 396
 397 static inline struct sk_buff *pull_skb(rtl8150_t *dev)
 398 {
 399         struct sk_buff *skb;
 400         int i;
 401
 402         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 403                 if (dev->rx_skb_pool[i]) {
 404                         skb = dev->rx_skb_pool[i];
 405                         dev->rx_skb_pool[i] = NULL;
 406                         return skb;
 407                 }
 408         }
 409         return NULL;
 410 }
 411
 412 static void read_bulk_callback(struct urb *urb, struct pt_regs *regs)
 413 {
 414         rtl8150_t *dev;
 415         unsigned pkt_len, res;
 416         struct sk_buff *skb;
 417         struct net_device *netdev;
 418         u16 rx_stat;
 419
 420         dev = urb->context;
 421         if (!dev)
 422                 return;
 423         if (test_bit(RTL8150_UNPLUG, &dev->flags))
 424                 return;
 425         netdev = dev->netdev;
 426         if (!netif_device_present(netdev))
 427                 return;
 428
 429         switch (urb->status) {
 430         case 0:
 431                 break;
 432         case -ENOENT:
 433                 return; /* the urb is in unlink state */
 434         case -ETIMEDOUT:
 435                 warn("may be reset is needed?..");
 436                 goto goon;
 437         default:
 438                 warn("Rx status %d", urb->status);
 439                 goto goon;
 440         }
 441
 442         if (!dev->rx_skb)
 443                 goto resched;
 444         /* protect against short packets (tell me why we got some?!?) */
 445         if (urb->actual_length < 4)
 446                 goto goon;
 447
 448         res = urb->actual_length;
 449         rx_stat = le16_to_cpu(*(__le16 *)(urb->transfer_buffer + res - 4));
 450         pkt_len = res - 4;
 451
 452         skb_put(dev->rx_skb, pkt_len);
 453         dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
 454         netif_rx(dev->rx_skb);
 455         dev->stats.rx_packets++;
 456         dev->stats.rx_bytes += pkt_len;
 457
 458         spin_lock(&dev->rx_pool_lock);
 459         skb = pull_skb(dev);
 460         spin_unlock(&dev->rx_pool_lock);
 461         if (!skb)
 462                 goto resched;
 463
 464         dev->rx_skb = skb;
 465 goon:
 466         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 467                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 468         if (usb_submit_urb(dev->rx_urb, GFP_ATOMIC)) {
 469                 set_bit(RX_URB_FAIL, &dev->flags);
 470                 goto resched;
 471         } else {
 472                 clear_bit(RX_URB_FAIL, &dev->flags);
 473         }
 474
 475         return;
 476 resched:
 477         tasklet_schedule(&dev->tl);
 478 }
 479
 480 static void rx_fixup(unsigned long data)
 481 {
 482         rtl8150_t *dev;
 483         struct sk_buff *skb;
 484
 485         dev = (rtl8150_t *)data;
 486
 487         spin_lock_irq(&dev->rx_pool_lock);
 488         fill_skb_pool(dev);
 489         spin_unlock_irq(&dev->rx_pool_lock);
 490         if (test_bit(RX_URB_FAIL, &dev->flags))
 491                 if (dev->rx_skb)
 492                         goto try_again;
 493         spin_lock_irq(&dev->rx_pool_lock);
 494         skb = pull_skb(dev);
 495         spin_unlock_irq(&dev->rx_pool_lock);
 496         if (skb == NULL)
 497                 goto tlsched;
 498         dev->rx_skb = skb;
 499         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 500                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 501 try_again:
 502         if (usb_submit_urb(dev->rx_urb, GFP_ATOMIC)) {
 503                 set_bit(RX_URB_FAIL, &dev->flags);
 504                 goto tlsched;
 505          } else {
 506                 clear_bit(RX_URB_FAIL, &dev->flags);
 507         }
 508
 509         return;
 510 tlsched:
 511         tasklet_schedule(&dev->tl);
 512 }
 513
 514 static void write_bulk_callback(struct urb *urb, struct pt_regs *regs)
 515 {
 516         rtl8150_t *dev;
 517
 518         dev = urb->context;
 519         if (!dev)
 520                 return;
 521         dev_kfree_skb_irq(dev->tx_skb);
 522         if (!netif_device_present(dev->netdev))
 523                 return;
 524         if (urb->status)
 525                 info("%s: Tx status %d", dev->netdev->name, urb->status);
 526         dev->netdev->trans_start = jiffies;
 527         netif_wake_queue(dev->netdev);
 528 }
 529
 530 static void intr_callback(struct urb *urb, struct pt_regs *regs)
 531 {
 532         rtl8150_t *dev;
 533         __u8 *d;
 534         int status;
 535
 536         dev = urb->context;
 537         if (!dev)
 538                 return;
 539         switch (urb->status) {
 540         case 0:                 /* success */
 541                 break;
 542         case -ECONNRESET:       /* unlink */
 543         case -ENOENT:
 544         case -ESHUTDOWN:
 545                 return;
 546         /* -EPIPE:  should clear the halt */
 547         default:
 548                 info("%s: intr status %d", dev->netdev->name, urb->status);
 549                 goto resubmit;
 550         }
 551
 552         d = urb->transfer_buffer;
 553         if (d[0] & TSR_ERRORS) {
 554                 dev->stats.tx_errors++;
 555                 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
 556                         dev->stats.tx_aborted_errors++;
 557                 if (d[INT_TSR] & TSR_LCOL)
 558                         dev->stats.tx_window_errors++;
 559                 if (d[INT_TSR] & TSR_LOSS_CRS)
 560                         dev->stats.tx_carrier_errors++;
 561         }
 562         /* Report link status changes to the network stack */
 563         if ((d[INT_MSR] & MSR_LINK) == 0) {
 564                 if (netif_carrier_ok(dev->netdev)) {
 565                         netif_carrier_off(dev->netdev);
 566                         dbg("%s: LINK LOST\n", __func__);
 567                 }
 568         } else {
 569                 if (!netif_carrier_ok(dev->netdev)) {
 570                         netif_carrier_on(dev->netdev);
 571                         dbg("%s: LINK CAME BACK\n", __func__);
 572                 }
 573         }
 574
 575 resubmit:
 576         status = usb_submit_urb (urb, SLAB_ATOMIC);
 577         if (status)
 578                 err ("can't resubmit intr, %s-%s/input0, status %d",
 579                                 dev->udev->bus->bus_name,
 580                                 dev->udev->devpath, status);
 581 }
 582
 583
 584 /*
 585 **
 586 **      network related part of the code
 587 **
 588 */
 589
 590 static void fill_skb_pool(rtl8150_t *dev)
 591 {
 592         struct sk_buff *skb;
 593         int i;
 594
 595         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 596                 if (dev->rx_skb_pool[i])
 597                         continue;
 598                 skb = dev_alloc_skb(RTL8150_MTU + 2);
 599                 if (!skb) {
 600                         return;
 601                 }
 602                 skb->dev = dev->netdev;
 603                 skb_reserve(skb, 2);
 604                 dev->rx_skb_pool[i] = skb;
 605         }
 606 }
 607
 608 static void free_skb_pool(rtl8150_t *dev)
 609 {
 610         int i;
 611
 612         for (i = 0; i < RX_SKB_POOL_SIZE; i++)
 613                 if (dev->rx_skb_pool[i])
 614                         dev_kfree_skb(dev->rx_skb_pool[i]);
 615 }
 616
 617 static int enable_net_traffic(rtl8150_t * dev)
 618 {
 619         u8 cr, tcr, rcr, msr;
 620
 621         if (!rtl8150_reset(dev)) {
 622                 warn("%s - device reset failed", __FUNCTION__);
 623         }
 624         /* RCR bit7=1 attach Rx info at the end;  =0 HW CRC (which is broken) */
 625         rcr = 0x9e;
 626         dev->rx_creg = cpu_to_le16(rcr);
 627         tcr = 0xd8;
 628         cr = 0x0c;
 629         if (!(rcr & 0x80))
 630                 set_bit(RTL8150_HW_CRC, &dev->flags);
 631         set_registers(dev, RCR, 1, &rcr);
 632         set_registers(dev, TCR, 1, &tcr);
 633         set_registers(dev, CR, 1, &cr);
 634         get_registers(dev, MSR, 1, &msr);
 635
 636         return 0;
 637 }
 638
 639 static void disable_net_traffic(rtl8150_t * dev)
 640 {
 641         u8 cr;
 642
 643         get_registers(dev, CR, 1, &cr);
 644         cr &= 0xf3;
 645         set_registers(dev, CR, 1, &cr);
 646 }
 647
 648 static struct net_device_stats *rtl8150_netdev_stats(struct net_device *dev)
 649 {
 650         return &((rtl8150_t *)netdev_priv(dev))->stats;
 651 }
 652
 653 static void rtl8150_tx_timeout(struct net_device *netdev)
 654 {
 655         rtl8150_t *dev = netdev_priv(netdev);
 656         warn("%s: Tx timeout.", netdev->name);
 657         usb_unlink_urb(dev->tx_urb);
 658         dev->stats.tx_errors++;
 659 }
 660
 661 static void rtl8150_set_multicast(struct net_device *netdev)
 662 {
 663         rtl8150_t *dev = netdev_priv(netdev);
 664         netif_stop_queue(netdev);
 665         if (netdev->flags & IFF_PROMISC) {
 666                 dev->rx_creg |= cpu_to_le16(0x0001);
 667                 info("%s: promiscuous mode", netdev->name);
 668         } else if (netdev->mc_count ||
 669                    (netdev->flags & IFF_ALLMULTI)) {
 670                 dev->rx_creg &= cpu_to_le16(0xfffe);
 671                 dev->rx_creg |= cpu_to_le16(0x0002);
 672                 info("%s: allmulti set", netdev->name);
 673         } else {
 674                 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
 675                 dev->rx_creg &= cpu_to_le16(0x00fc);
 676         }
 677         async_set_registers(dev, RCR, 2);
 678         netif_wake_queue(netdev);
 679 }
 680
 681 static int rtl8150_start_xmit(struct sk_buff *skb, struct net_device *netdev)
 682 {
 683         rtl8150_t *dev = netdev_priv(netdev);
 684         int count, res;
 685
 686         netif_stop_queue(netdev);
 687         count = (skb->len < 60) ? 60 : skb->len;
 688         count = (count & 0x3f) ? count : count + 1;
 689         dev->tx_skb = skb;
 690         usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
 691                       skb->data, count, write_bulk_callback, dev);
 692         if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
 693                 warn("failed tx_urb %d\n", res);
 694                 dev->stats.tx_errors++;
 695                 netif_start_queue(netdev);
 696         } else {
 697                 dev->stats.tx_packets++;
 698                 dev->stats.tx_bytes += skb->len;
 699                 netdev->trans_start = jiffies;
 700         }
 701
 702         return 0;
 703 }
 704
 705
 706 static void set_carrier(struct net_device *netdev)
 707 {
 708         rtl8150_t *dev = netdev_priv(netdev);
 709         short tmp;
 710
 711         get_registers(dev, CSCR, 2, &tmp);
 712         if (tmp & CSCR_LINK_STATUS)
 713                 netif_carrier_on(netdev);
 714         else
 715                 netif_carrier_off(netdev);
 716 }
 717
 718 static int rtl8150_open(struct net_device *netdev)
 719 {
 720         rtl8150_t *dev = netdev_priv(netdev);
 721         int res;
 722
 723         if (dev->rx_skb == NULL)
 724                 dev->rx_skb = pull_skb(dev);
 725         if (!dev->rx_skb)
 726                 return -ENOMEM;
 727
 728         set_registers(dev, IDR, 6, netdev->dev_addr);
 729
 730         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 731                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 732         if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL)))
 733                 warn("%s: rx_urb submit failed: %d", __FUNCTION__, res);
 734         usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
 735                      dev->intr_buff, INTBUFSIZE, intr_callback,
 736                      dev, dev->intr_interval);
 737         if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL)))
 738                 warn("%s: intr_urb submit failed: %d", __FUNCTION__, res);
 739         netif_start_queue(netdev);
 740         enable_net_traffic(dev);
 741         set_carrier(netdev);
 742
 743         return res;
 744 }
 745
 746 static int rtl8150_close(struct net_device *netdev)
 747 {
 748         rtl8150_t *dev = netdev_priv(netdev);
 749         int res = 0;
 750
 751         netif_stop_queue(netdev);
 752         if (!test_bit(RTL8150_UNPLUG, &dev->flags))
 753                 disable_net_traffic(dev);
 754         unlink_all_urbs(dev);
 755
 756         return res;
 757 }
 758
 759 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
 760 {
 761         rtl8150_t *dev = netdev_priv(netdev);
 762
 763         strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
 764         strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
 765         usb_make_path(dev->udev, info->bus_info, sizeof info->bus_info);
 766 }
 767
 768 static int rtl8150_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
 769 {
 770         rtl8150_t *dev = netdev_priv(netdev);
 771         short lpa, bmcr;
 772
 773         ecmd->supported = (SUPPORTED_10baseT_Half |
 774                           SUPPORTED_10baseT_Full |
 775                           SUPPORTED_100baseT_Half |
 776                           SUPPORTED_100baseT_Full |
 777                           SUPPORTED_Autoneg |
 778                           SUPPORTED_TP | SUPPORTED_MII);
 779         ecmd->port = PORT_TP;
 780         ecmd->transceiver = XCVR_INTERNAL;
 781         ecmd->phy_address = dev->phy;
 782         get_registers(dev, BMCR, 2, &bmcr);
 783         get_registers(dev, ANLP, 2, &lpa);
 784         if (bmcr & BMCR_ANENABLE) {
 785                 ecmd->autoneg = AUTONEG_ENABLE;
 786                 ecmd->speed = (lpa & (LPA_100HALF | LPA_100FULL)) ?
 787                              SPEED_100 : SPEED_10;
 788                 if (ecmd->speed == SPEED_100)
 789                         ecmd->duplex = (lpa & LPA_100FULL) ?
 790                             DUPLEX_FULL : DUPLEX_HALF;
 791                 else
 792                         ecmd->duplex = (lpa & LPA_10FULL) ?
 793                             DUPLEX_FULL : DUPLEX_HALF;
 794         } else {
 795                 ecmd->autoneg = AUTONEG_DISABLE;
 796                 ecmd->speed = (bmcr & BMCR_SPEED100) ?
 797                     SPEED_100 : SPEED_10;
 798                 ecmd->duplex = (bmcr & BMCR_FULLDPLX) ?
 799                     DUPLEX_FULL : DUPLEX_HALF;
 800         }
 801         return 0;
 802 }
 803
 804 static struct ethtool_ops ops = {
 805         .get_drvinfo = rtl8150_get_drvinfo,
 806         .get_settings = rtl8150_get_settings,
 807         .get_link = ethtool_op_get_link
 808 };
 809
 810 static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 811 {
 812         rtl8150_t *dev = netdev_priv(netdev);
 813         u16 *data = (u16 *) & rq->ifr_ifru;
 814         int res = 0;
 815
 816         switch (cmd) {
 817         case SIOCDEVPRIVATE:
 818                 data[0] = dev->phy;
 819         case SIOCDEVPRIVATE + 1:
 820                 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
 821                 break;
 822         case SIOCDEVPRIVATE + 2:
 823                 if (!capable(CAP_NET_ADMIN))
 824                         return -EPERM;
 825                 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
 826                 break;
 827         default:
 828                 res = -EOPNOTSUPP;
 829         }
 830
 831         return res;
 832 }
 833
 834 static int rtl8150_probe(struct usb_interface *intf,
 835                          const struct usb_device_id *id)
 836 {
 837         struct usb_device *udev = interface_to_usbdev(intf);
 838         rtl8150_t *dev;
 839         struct net_device *netdev;
 840
 841         netdev = alloc_etherdev(sizeof(rtl8150_t));
 842         if (!netdev) {
 843                 err("Out of memory");
 844                 return -ENOMEM;
 845         }
 846
 847         dev = netdev_priv(netdev);
 848         memset(dev, 0, sizeof(rtl8150_t));
 849
 850         dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
 851         if (!dev->intr_buff) {
 852                 free_netdev(netdev);
 853                 return -ENOMEM;
 854         }
 855
 856         tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
 857         spin_lock_init(&dev->rx_pool_lock);
 858
 859         dev->udev = udev;
 860         dev->netdev = netdev;
 861         SET_MODULE_OWNER(netdev);
 862         netdev->open = rtl8150_open;
 863         netdev->stop = rtl8150_close;
 864         netdev->do_ioctl = rtl8150_ioctl;
 865         netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
 866         netdev->tx_timeout = rtl8150_tx_timeout;
 867         netdev->hard_start_xmit = rtl8150_start_xmit;
 868         netdev->set_multicast_list = rtl8150_set_multicast;
 869         netdev->set_mac_address = rtl8150_set_mac_address;
 870         netdev->get_stats = rtl8150_netdev_stats;
 871         netdev->mtu = RTL8150_MTU;
 872         SET_ETHTOOL_OPS(netdev, &ops);
 873         dev->intr_interval = 100;       /* 100ms */
 874
 875         if (!alloc_all_urbs(dev)) {
 876                 err("out of memory");
 877                 goto out;
 878         }
 879         if (!rtl8150_reset(dev)) {
 880                 err("couldn't reset the device");
 881                 goto out1;
 882         }
 883         fill_skb_pool(dev);
 884         set_ethernet_addr(dev);
 885
 886         usb_set_intfdata(intf, dev);
 887         SET_NETDEV_DEV(netdev, &intf->dev);
 888         if (register_netdev(netdev) != 0) {
 889                 err("couldn't register the device");
 890                 goto out2;
 891         }
 892
 893         info("%s: rtl8150 is detected", netdev->name);
 894
 895         return 0;
 896
 897 out2:
 898         usb_set_intfdata(intf, NULL);
 899         free_skb_pool(dev);
 900 out1:
 901         free_all_urbs(dev);
 902 out:
 903         kfree(dev->intr_buff);
 904         free_netdev(netdev);
 905         return -EIO;
 906 }
 907
 908 static void rtl8150_disconnect(struct usb_interface *intf)
 909 {
 910         rtl8150_t *dev = usb_get_intfdata(intf);
 911
 912         usb_set_intfdata(intf, NULL);
 913         if (dev) {
 914                 set_bit(RTL8150_UNPLUG, &dev->flags);
 915                 tasklet_disable(&dev->tl);
 916                 unregister_netdev(dev->netdev);
 917                 unlink_all_urbs(dev);
 918                 free_all_urbs(dev);
 919                 free_skb_pool(dev);
 920                 if (dev->rx_skb)
 921                         dev_kfree_skb(dev->rx_skb);
 922                 kfree(dev->intr_buff);
 923                 free_netdev(dev->netdev);
 924         }
 925 }
 926
 927 static int __init usb_rtl8150_init(void)
 928 {
 929         info(DRIVER_DESC " " DRIVER_VERSION);
 930         return usb_register(&rtl8150_driver);
 931 }
 932
 933 static void __exit usb_rtl8150_exit(void)
 934 {
 935         usb_deregister(&rtl8150_driver);
 936 }
 937
 938 module_init(usb_rtl8150_init);
 939 module_exit(usb_rtl8150_exit);
 940
 941 MODULE_AUTHOR(DRIVER_AUTHOR);
 942 MODULE_DESCRIPTION(DRIVER_DESC);
 943 MODULE_LICENSE("GPL");