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
 132 #define PRODUCT_ID_RTL8150              0x8150
 133 #define PRODUCT_ID_LUAKTX               0x0012
 134 #define PRODUCT_ID_LCS8138TX            0x401a
 135 #define PRODUCT_ID_SP128AR              0x0003
 136
 137 #undef  EEPROM_WRITE
 138
 139 /* table of devices that work with this driver */
 140 static struct usb_device_id rtl8150_table[] = {
 141         {USB_DEVICE(VENDOR_ID_REALTEK, PRODUCT_ID_RTL8150)},
 142         {USB_DEVICE(VENDOR_ID_MELCO, PRODUCT_ID_LUAKTX)},
 143         {USB_DEVICE(VENDOR_ID_MICRONET, PRODUCT_ID_SP128AR)},
 144         {USB_DEVICE(VENDOR_ID_LONGSHINE, PRODUCT_ID_LCS8138TX)},
 145         {}
 146 };
 147
 148 MODULE_DEVICE_TABLE(usb, rtl8150_table);
 149
 150 struct rtl8150 {
 151         unsigned long flags;
 152         struct usb_device *udev;
 153         struct tasklet_struct tl;
 154         struct net_device_stats stats;
 155         struct net_device *netdev;
 156         struct urb *rx_urb, *tx_urb, *intr_urb, *ctrl_urb;
 157         struct sk_buff *tx_skb, *rx_skb;
 158         struct sk_buff *rx_skb_pool[RX_SKB_POOL_SIZE];
 159         spinlock_t rx_pool_lock;
 160         struct usb_ctrlrequest dr;
 161         int intr_interval;
 162         __le16 rx_creg;
 163         u8 *intr_buff;
 164         u8 phy;
 165 };
 166
 167 typedef struct rtl8150 rtl8150_t;
 168
 169 static void fill_skb_pool(rtl8150_t *);
 170 static void free_skb_pool(rtl8150_t *);
 171 static inline struct sk_buff *pull_skb(rtl8150_t *);
 172 static void rtl8150_disconnect(struct usb_interface *intf);
 173 static int rtl8150_probe(struct usb_interface *intf,
 174                            const struct usb_device_id *id);
 175
 176 static const char driver_name [] = "rtl8150";
 177
 178 static struct usb_driver rtl8150_driver = {
 179         .name =         driver_name,
 180         .probe =        rtl8150_probe,
 181         .disconnect =   rtl8150_disconnect,
 182         .id_table =     rtl8150_table,
 183 };
 184
 185 /*
 186 **
 187 **      device related part of the code
 188 **
 189 */
 190 static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
 191 {
 192         return usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
 193                                RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
 194                                indx, 0, data, size, 500);
 195 }
 196
 197 static int set_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
 198 {
 199         return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
 200                                RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
 201                                indx, 0, data, size, 500);
 202 }
 203
 204 static void ctrl_callback(struct urb *urb, struct pt_regs *regs)
 205 {
 206         rtl8150_t *dev;
 207
 208         switch (urb->status) {
 209         case 0:
 210                 break;
 211         case -EINPROGRESS:
 212                 break;
 213         case -ENOENT:
 214                 break;
 215         default:
 216                 warn("ctrl urb status %d", urb->status);
 217         }
 218         dev = urb->context;
 219         clear_bit(RX_REG_SET, &dev->flags);
 220 }
 221
 222 static int async_set_registers(rtl8150_t * dev, u16 indx, u16 size)
 223 {
 224         int ret;
 225
 226         if (test_bit(RX_REG_SET, &dev->flags))
 227                 return -EAGAIN;
 228
 229         dev->dr.bRequestType = RTL8150_REQT_WRITE;
 230         dev->dr.bRequest = RTL8150_REQ_SET_REGS;
 231         dev->dr.wValue = cpu_to_le16(indx);
 232         dev->dr.wIndex = 0;
 233         dev->dr.wLength = cpu_to_le16(size);
 234         dev->ctrl_urb->transfer_buffer_length = size;
 235         usb_fill_control_urb(dev->ctrl_urb, dev->udev,
 236                          usb_sndctrlpipe(dev->udev, 0), (char *) &dev->dr,
 237                          &dev->rx_creg, size, ctrl_callback, dev);
 238         if ((ret = usb_submit_urb(dev->ctrl_urb, GFP_ATOMIC)))
 239                 err("control request submission failed: %d", ret);
 240         else
 241                 set_bit(RX_REG_SET, &dev->flags);
 242
 243         return ret;
 244 }
 245
 246 static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
 247 {
 248         int i;
 249         u8 data[3], tmp;
 250
 251         data[0] = phy;
 252         data[1] = data[2] = 0;
 253         tmp = indx | PHY_READ | PHY_GO;
 254         i = 0;
 255
 256         set_registers(dev, PHYADD, sizeof(data), data);
 257         set_registers(dev, PHYCNT, 1, &tmp);
 258         do {
 259                 get_registers(dev, PHYCNT, 1, data);
 260         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 261
 262         if (i < MII_TIMEOUT) {
 263                 get_registers(dev, PHYDAT, 2, data);
 264                 *reg = data[0] | (data[1] << 8);
 265                 return 0;
 266         } else
 267                 return 1;
 268 }
 269
 270 static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
 271 {
 272         int i;
 273         u8 data[3], tmp;
 274
 275         data[0] = phy;
 276         *(data + 1) = cpu_to_le16p(&reg);
 277         tmp = indx | PHY_WRITE | PHY_GO;
 278         i = 0;
 279
 280         set_registers(dev, PHYADD, sizeof(data), data);
 281         set_registers(dev, PHYCNT, 1, &tmp);
 282         do {
 283                 get_registers(dev, PHYCNT, 1, data);
 284         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 285
 286         if (i < MII_TIMEOUT)
 287                 return 0;
 288         else
 289                 return 1;
 290 }
 291
 292 static inline void set_ethernet_addr(rtl8150_t * dev)
 293 {
 294         u8 node_id[6];
 295
 296         get_registers(dev, IDR, sizeof(node_id), node_id);
 297         memcpy(dev->netdev->dev_addr, node_id, sizeof(node_id));
 298 }
 299
 300 static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
 301 {
 302         struct sockaddr *addr = p;
 303         rtl8150_t *dev = netdev_priv(netdev);
 304         int i;
 305
 306         if (netif_running(netdev))
 307                 return -EBUSY;
 308
 309         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 310         dbg("%s: Setting MAC address to ", netdev->name);
 311         for (i = 0; i < 5; i++)
 312                 dbg("%02X:", netdev->dev_addr[i]);
 313         dbg("%02X\n", netdev->dev_addr[i]);
 314         /* Set the IDR registers. */
 315         set_registers(dev, IDR, sizeof(netdev->dev_addr), netdev->dev_addr);
 316 #ifdef EEPROM_WRITE
 317         {
 318         u8 cr;
 319         /* Get the CR contents. */
 320         get_registers(dev, CR, 1, &cr);
 321         /* Set the WEPROM bit (eeprom write enable). */
 322         cr |= 0x20;
 323         set_registers(dev, CR, 1, &cr);
 324         /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
 325            so we need to split them up. */
 326         for (i = 0; i * 2 < netdev->addr_len; i++) {
 327                 set_registers(dev, IDR_EEPROM + (i * 2), 2,
 328                 netdev->dev_addr + (i * 2));
 329         }
 330         /* Clear the WEPROM bit (preventing accidental eeprom writes). */
 331         cr &= 0xdf;
 332         set_registers(dev, CR, 1, &cr);
 333         }
 334 #endif
 335         return 0;
 336 }
 337
 338 static int rtl8150_reset(rtl8150_t * dev)
 339 {
 340         u8 data = 0x10;
 341         int i = HZ;
 342
 343         set_registers(dev, CR, 1, &data);
 344         do {
 345                 get_registers(dev, CR, 1, &data);
 346         } while ((data & 0x10) && --i);
 347
 348         return (i > 0) ? 1 : 0;
 349 }
 350
 351 static int alloc_all_urbs(rtl8150_t * dev)
 352 {
 353         dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 354         if (!dev->rx_urb)
 355                 return 0;
 356         dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 357         if (!dev->tx_urb) {
 358                 usb_free_urb(dev->rx_urb);
 359                 return 0;
 360         }
 361         dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
 362         if (!dev->intr_urb) {
 363                 usb_free_urb(dev->rx_urb);
 364                 usb_free_urb(dev->tx_urb);
 365                 return 0;
 366         }
 367         dev->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
 368         if (!dev->intr_urb) {
 369                 usb_free_urb(dev->rx_urb);
 370                 usb_free_urb(dev->tx_urb);
 371                 usb_free_urb(dev->intr_urb);
 372                 return 0;
 373         }
 374
 375         return 1;
 376 }
 377
 378 static void free_all_urbs(rtl8150_t * dev)
 379 {
 380         usb_free_urb(dev->rx_urb);
 381         usb_free_urb(dev->tx_urb);
 382         usb_free_urb(dev->intr_urb);
 383         usb_free_urb(dev->ctrl_urb);
 384 }
 385
 386 static void unlink_all_urbs(rtl8150_t * dev)
 387 {
 388         usb_kill_urb(dev->rx_urb);
 389         usb_kill_urb(dev->tx_urb);
 390         usb_kill_urb(dev->intr_urb);
 391         usb_kill_urb(dev->ctrl_urb);
 392 }
 393
 394 static inline struct sk_buff *pull_skb(rtl8150_t *dev)
 395 {
 396         struct sk_buff *skb;
 397         int i;
 398
 399         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 400                 if (dev->rx_skb_pool[i]) {
 401                         skb = dev->rx_skb_pool[i];
 402                         dev->rx_skb_pool[i] = NULL;
 403                         return skb;
 404                 }
 405         }
 406         return NULL;
 407 }
 408
 409 static void read_bulk_callback(struct urb *urb, struct pt_regs *regs)
 410 {
 411         rtl8150_t *dev;
 412         unsigned pkt_len, res;
 413         struct sk_buff *skb;
 414         struct net_device *netdev;
 415         u16 rx_stat;
 416
 417         dev = urb->context;
 418         if (!dev)
 419                 return;
 420         if (test_bit(RTL8150_UNPLUG, &dev->flags))
 421                 return;
 422         netdev = dev->netdev;
 423         if (!netif_device_present(netdev))
 424                 return;
 425
 426         switch (urb->status) {
 427         case 0:
 428                 break;
 429         case -ENOENT:
 430                 return; /* the urb is in unlink state */
 431         case -ETIMEDOUT:
 432                 warn("may be reset is needed?..");
 433                 goto goon;
 434         default:
 435                 warn("Rx status %d", urb->status);
 436                 goto goon;
 437         }
 438
 439         if (!dev->rx_skb)
 440                 goto resched;
 441         /* protect against short packets (tell me why we got some?!?) */
 442         if (urb->actual_length < 4)
 443                 goto goon;
 444
 445         res = urb->actual_length;
 446         rx_stat = le16_to_cpu(*(__le16 *)(urb->transfer_buffer + res - 4));
 447         pkt_len = res - 4;
 448
 449         skb_put(dev->rx_skb, pkt_len);
 450         dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
 451         netif_rx(dev->rx_skb);
 452         dev->stats.rx_packets++;
 453         dev->stats.rx_bytes += pkt_len;
 454
 455         spin_lock(&dev->rx_pool_lock);
 456         skb = pull_skb(dev);
 457         spin_unlock(&dev->rx_pool_lock);
 458         if (!skb)
 459                 goto resched;
 460
 461         dev->rx_skb = skb;
 462 goon:
 463         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 464                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 465         if (usb_submit_urb(dev->rx_urb, GFP_ATOMIC)) {
 466                 set_bit(RX_URB_FAIL, &dev->flags);
 467                 goto resched;
 468         } else {
 469                 clear_bit(RX_URB_FAIL, &dev->flags);
 470         }
 471
 472         return;
 473 resched:
 474         tasklet_schedule(&dev->tl);
 475 }
 476
 477 static void rx_fixup(unsigned long data)
 478 {
 479         rtl8150_t *dev;
 480         struct sk_buff *skb;
 481
 482         dev = (rtl8150_t *)data;
 483
 484         spin_lock_irq(&dev->rx_pool_lock);
 485         fill_skb_pool(dev);
 486         spin_unlock_irq(&dev->rx_pool_lock);
 487         if (test_bit(RX_URB_FAIL, &dev->flags))
 488                 if (dev->rx_skb)
 489                         goto try_again;
 490         spin_lock_irq(&dev->rx_pool_lock);
 491         skb = pull_skb(dev);
 492         spin_unlock_irq(&dev->rx_pool_lock);
 493         if (skb == NULL)
 494                 goto tlsched;
 495         dev->rx_skb = skb;
 496         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 497                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 498 try_again:
 499         if (usb_submit_urb(dev->rx_urb, GFP_ATOMIC)) {
 500                 set_bit(RX_URB_FAIL, &dev->flags);
 501                 goto tlsched;
 502          } else {
 503                 clear_bit(RX_URB_FAIL, &dev->flags);
 504         }
 505
 506         return;
 507 tlsched:
 508         tasklet_schedule(&dev->tl);
 509 }
 510
 511 static void write_bulk_callback(struct urb *urb, struct pt_regs *regs)
 512 {
 513         rtl8150_t *dev;
 514
 515         dev = urb->context;
 516         if (!dev)
 517                 return;
 518         dev_kfree_skb_irq(dev->tx_skb);
 519         if (!netif_device_present(dev->netdev))
 520                 return;
 521         if (urb->status)
 522                 info("%s: Tx status %d", dev->netdev->name, urb->status);
 523         dev->netdev->trans_start = jiffies;
 524         netif_wake_queue(dev->netdev);
 525 }
 526
 527 static void intr_callback(struct urb *urb, struct pt_regs *regs)
 528 {
 529         rtl8150_t *dev;
 530         __u8 *d;
 531         int status;
 532
 533         dev = urb->context;
 534         if (!dev)
 535                 return;
 536         switch (urb->status) {
 537         case 0:                 /* success */
 538                 break;
 539         case -ECONNRESET:       /* unlink */
 540         case -ENOENT:
 541         case -ESHUTDOWN:
 542                 return;
 543         /* -EPIPE:  should clear the halt */
 544         default:
 545                 info("%s: intr status %d", dev->netdev->name, urb->status);
 546                 goto resubmit;
 547         }
 548
 549         d = urb->transfer_buffer;
 550         if (d[0] & TSR_ERRORS) {
 551                 dev->stats.tx_errors++;
 552                 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
 553                         dev->stats.tx_aborted_errors++;
 554                 if (d[INT_TSR] & TSR_LCOL)
 555                         dev->stats.tx_window_errors++;
 556                 if (d[INT_TSR] & TSR_LOSS_CRS)
 557                         dev->stats.tx_carrier_errors++;
 558         }
 559         /* Report link status changes to the network stack */
 560         if ((d[INT_MSR] & MSR_LINK) == 0) {
 561                 if (netif_carrier_ok(dev->netdev)) {
 562                         netif_carrier_off(dev->netdev);
 563                         dbg("%s: LINK LOST\n", __func__);
 564                 }
 565         } else {
 566                 if (!netif_carrier_ok(dev->netdev)) {
 567                         netif_carrier_on(dev->netdev);
 568                         dbg("%s: LINK CAME BACK\n", __func__);
 569                 }
 570         }
 571
 572 resubmit:
 573         status = usb_submit_urb (urb, SLAB_ATOMIC);
 574         if (status)
 575                 err ("can't resubmit intr, %s-%s/input0, status %d",
 576                                 dev->udev->bus->bus_name,
 577                                 dev->udev->devpath, status);
 578 }
 579
 580
 581 /*
 582 **
 583 **      network related part of the code
 584 **
 585 */
 586
 587 static void fill_skb_pool(rtl8150_t *dev)
 588 {
 589         struct sk_buff *skb;
 590         int i;
 591
 592         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 593                 if (dev->rx_skb_pool[i])
 594                         continue;
 595                 skb = dev_alloc_skb(RTL8150_MTU + 2);
 596                 if (!skb) {
 597                         return;
 598                 }
 599                 skb->dev = dev->netdev;
 600                 skb_reserve(skb, 2);
 601                 dev->rx_skb_pool[i] = skb;
 602         }
 603 }
 604
 605 static void free_skb_pool(rtl8150_t *dev)
 606 {
 607         int i;
 608
 609         for (i = 0; i < RX_SKB_POOL_SIZE; i++)
 610                 if (dev->rx_skb_pool[i])
 611                         dev_kfree_skb(dev->rx_skb_pool[i]);
 612 }
 613
 614 static int enable_net_traffic(rtl8150_t * dev)
 615 {
 616         u8 cr, tcr, rcr, msr;
 617
 618         if (!rtl8150_reset(dev)) {
 619                 warn("%s - device reset failed", __FUNCTION__);
 620         }
 621         /* RCR bit7=1 attach Rx info at the end;  =0 HW CRC (which is broken) */
 622         rcr = 0x9e;
 623         dev->rx_creg = cpu_to_le16(rcr);
 624         tcr = 0xd8;
 625         cr = 0x0c;
 626         if (!(rcr & 0x80))
 627                 set_bit(RTL8150_HW_CRC, &dev->flags);
 628         set_registers(dev, RCR, 1, &rcr);
 629         set_registers(dev, TCR, 1, &tcr);
 630         set_registers(dev, CR, 1, &cr);
 631         get_registers(dev, MSR, 1, &msr);
 632
 633         return 0;
 634 }
 635
 636 static void disable_net_traffic(rtl8150_t * dev)
 637 {
 638         u8 cr;
 639
 640         get_registers(dev, CR, 1, &cr);
 641         cr &= 0xf3;
 642         set_registers(dev, CR, 1, &cr);
 643 }
 644
 645 static struct net_device_stats *rtl8150_netdev_stats(struct net_device *dev)
 646 {
 647         return &((rtl8150_t *)netdev_priv(dev))->stats;
 648 }
 649
 650 static void rtl8150_tx_timeout(struct net_device *netdev)
 651 {
 652         rtl8150_t *dev = netdev_priv(netdev);
 653         warn("%s: Tx timeout.", netdev->name);
 654         usb_unlink_urb(dev->tx_urb);
 655         dev->stats.tx_errors++;
 656 }
 657
 658 static void rtl8150_set_multicast(struct net_device *netdev)
 659 {
 660         rtl8150_t *dev = netdev_priv(netdev);
 661         netif_stop_queue(netdev);
 662         if (netdev->flags & IFF_PROMISC) {
 663                 dev->rx_creg |= cpu_to_le16(0x0001);
 664                 info("%s: promiscuous mode", netdev->name);
 665         } else if (netdev->mc_count ||
 666                    (netdev->flags & IFF_ALLMULTI)) {
 667                 dev->rx_creg &= cpu_to_le16(0xfffe);
 668                 dev->rx_creg |= cpu_to_le16(0x0002);
 669                 info("%s: allmulti set", netdev->name);
 670         } else {
 671                 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
 672                 dev->rx_creg &= cpu_to_le16(0x00fc);
 673         }
 674         async_set_registers(dev, RCR, 2);
 675         netif_wake_queue(netdev);
 676 }
 677
 678 static int rtl8150_start_xmit(struct sk_buff *skb, struct net_device *netdev)
 679 {
 680         rtl8150_t *dev = netdev_priv(netdev);
 681         int count, res;
 682
 683         netif_stop_queue(netdev);
 684         count = (skb->len < 60) ? 60 : skb->len;
 685         count = (count & 0x3f) ? count : count + 1;
 686         dev->tx_skb = skb;
 687         usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
 688                       skb->data, count, write_bulk_callback, dev);
 689         if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
 690                 warn("failed tx_urb %d\n", res);
 691                 dev->stats.tx_errors++;
 692                 netif_start_queue(netdev);
 693         } else {
 694                 dev->stats.tx_packets++;
 695                 dev->stats.tx_bytes += skb->len;
 696                 netdev->trans_start = jiffies;
 697         }
 698
 699         return 0;
 700 }
 701
 702
 703 static void set_carrier(struct net_device *netdev)
 704 {
 705         rtl8150_t *dev = netdev_priv(netdev);
 706         short tmp;
 707
 708         get_registers(dev, CSCR, 2, &tmp);
 709         if (tmp & CSCR_LINK_STATUS)
 710                 netif_carrier_on(netdev);
 711         else
 712                 netif_carrier_off(netdev);
 713 }
 714
 715 static int rtl8150_open(struct net_device *netdev)
 716 {
 717         rtl8150_t *dev = netdev_priv(netdev);
 718         int res;
 719
 720         if (dev->rx_skb == NULL)
 721                 dev->rx_skb = pull_skb(dev);
 722         if (!dev->rx_skb)
 723                 return -ENOMEM;
 724
 725         set_registers(dev, IDR, 6, netdev->dev_addr);
 726
 727         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 728                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 729         if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL)))
 730                 warn("%s: rx_urb submit failed: %d", __FUNCTION__, res);
 731         usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
 732                      dev->intr_buff, INTBUFSIZE, intr_callback,
 733                      dev, dev->intr_interval);
 734         if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL)))
 735                 warn("%s: intr_urb submit failed: %d", __FUNCTION__, res);
 736         netif_start_queue(netdev);
 737         enable_net_traffic(dev);
 738         set_carrier(netdev);
 739
 740         return res;
 741 }
 742
 743 static int rtl8150_close(struct net_device *netdev)
 744 {
 745         rtl8150_t *dev = netdev_priv(netdev);
 746         int res = 0;
 747
 748         netif_stop_queue(netdev);
 749         if (!test_bit(RTL8150_UNPLUG, &dev->flags))
 750                 disable_net_traffic(dev);
 751         unlink_all_urbs(dev);
 752
 753         return res;
 754 }
 755
 756 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
 757 {
 758         rtl8150_t *dev = netdev_priv(netdev);
 759
 760         strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
 761         strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
 762         usb_make_path(dev->udev, info->bus_info, sizeof info->bus_info);
 763 }
 764
 765 static int rtl8150_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
 766 {
 767         rtl8150_t *dev = netdev_priv(netdev);
 768         short lpa, bmcr;
 769
 770         ecmd->supported = (SUPPORTED_10baseT_Half |
 771                           SUPPORTED_10baseT_Full |
 772                           SUPPORTED_100baseT_Half |
 773                           SUPPORTED_100baseT_Full |
 774                           SUPPORTED_Autoneg |
 775                           SUPPORTED_TP | SUPPORTED_MII);
 776         ecmd->port = PORT_TP;
 777         ecmd->transceiver = XCVR_INTERNAL;
 778         ecmd->phy_address = dev->phy;
 779         get_registers(dev, BMCR, 2, &bmcr);
 780         get_registers(dev, ANLP, 2, &lpa);
 781         if (bmcr & BMCR_ANENABLE) {
 782                 ecmd->autoneg = AUTONEG_ENABLE;
 783                 ecmd->speed = (lpa & (LPA_100HALF | LPA_100FULL)) ?
 784                              SPEED_100 : SPEED_10;
 785                 if (ecmd->speed == SPEED_100)
 786                         ecmd->duplex = (lpa & LPA_100FULL) ?
 787                             DUPLEX_FULL : DUPLEX_HALF;
 788                 else
 789                         ecmd->duplex = (lpa & LPA_10FULL) ?
 790                             DUPLEX_FULL : DUPLEX_HALF;
 791         } else {
 792                 ecmd->autoneg = AUTONEG_DISABLE;
 793                 ecmd->speed = (bmcr & BMCR_SPEED100) ?
 794                     SPEED_100 : SPEED_10;
 795                 ecmd->duplex = (bmcr & BMCR_FULLDPLX) ?
 796                     DUPLEX_FULL : DUPLEX_HALF;
 797         }
 798         return 0;
 799 }
 800
 801 static struct ethtool_ops ops = {
 802         .get_drvinfo = rtl8150_get_drvinfo,
 803         .get_settings = rtl8150_get_settings,
 804         .get_link = ethtool_op_get_link
 805 };
 806
 807 static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 808 {
 809         rtl8150_t *dev = netdev_priv(netdev);
 810         u16 *data = (u16 *) & rq->ifr_ifru;
 811         int res = 0;
 812
 813         switch (cmd) {
 814         case SIOCDEVPRIVATE:
 815                 data[0] = dev->phy;
 816         case SIOCDEVPRIVATE + 1:
 817                 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
 818                 break;
 819         case SIOCDEVPRIVATE + 2:
 820                 if (!capable(CAP_NET_ADMIN))
 821                         return -EPERM;
 822                 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
 823                 break;
 824         default:
 825                 res = -EOPNOTSUPP;
 826         }
 827
 828         return res;
 829 }
 830
 831 static int rtl8150_probe(struct usb_interface *intf,
 832                          const struct usb_device_id *id)
 833 {
 834         struct usb_device *udev = interface_to_usbdev(intf);
 835         rtl8150_t *dev;
 836         struct net_device *netdev;
 837
 838         netdev = alloc_etherdev(sizeof(rtl8150_t));
 839         if (!netdev) {
 840                 err("Out of memory");
 841                 return -ENOMEM;
 842         }
 843
 844         dev = netdev_priv(netdev);
 845         memset(dev, 0, sizeof(rtl8150_t));
 846
 847         dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
 848         if (!dev->intr_buff) {
 849                 free_netdev(netdev);
 850                 return -ENOMEM;
 851         }
 852
 853         tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
 854         spin_lock_init(&dev->rx_pool_lock);
 855
 856         dev->udev = udev;
 857         dev->netdev = netdev;
 858         SET_MODULE_OWNER(netdev);
 859         netdev->open = rtl8150_open;
 860         netdev->stop = rtl8150_close;
 861         netdev->do_ioctl = rtl8150_ioctl;
 862         netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
 863         netdev->tx_timeout = rtl8150_tx_timeout;
 864         netdev->hard_start_xmit = rtl8150_start_xmit;
 865         netdev->set_multicast_list = rtl8150_set_multicast;
 866         netdev->set_mac_address = rtl8150_set_mac_address;
 867         netdev->get_stats = rtl8150_netdev_stats;
 868         netdev->mtu = RTL8150_MTU;
 869         SET_ETHTOOL_OPS(netdev, &ops);
 870         dev->intr_interval = 100;       /* 100ms */
 871
 872         if (!alloc_all_urbs(dev)) {
 873                 err("out of memory");
 874                 goto out;
 875         }
 876         if (!rtl8150_reset(dev)) {
 877                 err("couldn't reset the device");
 878                 goto out1;
 879         }
 880         fill_skb_pool(dev);
 881         set_ethernet_addr(dev);
 882
 883         usb_set_intfdata(intf, dev);
 884         SET_NETDEV_DEV(netdev, &intf->dev);
 885         if (register_netdev(netdev) != 0) {
 886                 err("couldn't register the device");
 887                 goto out2;
 888         }
 889
 890         info("%s: rtl8150 is detected", netdev->name);
 891
 892         return 0;
 893
 894 out2:
 895         usb_set_intfdata(intf, NULL);
 896         free_skb_pool(dev);
 897 out1:
 898         free_all_urbs(dev);
 899 out:
 900         kfree(dev->intr_buff);
 901         free_netdev(netdev);
 902         return -EIO;
 903 }
 904
 905 static void rtl8150_disconnect(struct usb_interface *intf)
 906 {
 907         rtl8150_t *dev = usb_get_intfdata(intf);
 908
 909         usb_set_intfdata(intf, NULL);
 910         if (dev) {
 911                 set_bit(RTL8150_UNPLUG, &dev->flags);
 912                 tasklet_disable(&dev->tl);
 913                 unregister_netdev(dev->netdev);
 914                 unlink_all_urbs(dev);
 915                 free_all_urbs(dev);
 916                 free_skb_pool(dev);
 917                 if (dev->rx_skb)
 918                         dev_kfree_skb(dev->rx_skb);
 919                 kfree(dev->intr_buff);
 920                 free_netdev(dev->netdev);
 921         }
 922 }
 923
 924 static int __init usb_rtl8150_init(void)
 925 {
 926         info(DRIVER_DESC " " DRIVER_VERSION);
 927         return usb_register(&rtl8150_driver);
 928 }
 929
 930 static void __exit usb_rtl8150_exit(void)
 931 {
 932         usb_deregister(&rtl8150_driver);
 933 }
 934
 935 module_init(usb_rtl8150_init);
 936 module_exit(usb_rtl8150_exit);
 937
 938 MODULE_AUTHOR(DRIVER_AUTHOR);
 939 MODULE_DESCRIPTION(DRIVER_DESC);
 940 MODULE_LICENSE("GPL");