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/config.h>
  10 #include <linux/sched.h>
  11 #include <linux/init.h>
  12 #include <linux/signal.h>
  13 #include <linux/slab.h>
  14 #include <linux/module.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/etherdevice.h>
  17 #include <linux/mii.h>
  18 #include <linux/ethtool.h>
  19 #include <linux/usb.h>
  20 #include <asm/uaccess.h>
  21
  22 /* Version Information */
  23 #define DRIVER_VERSION "v0.6.2 (2004/08/27)"
  24 #define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>"
  25 #define DRIVER_DESC "rtl8150 based usb-ethernet driver"
  26
  27 #define IDR                     0x0120
  28 #define MAR                     0x0126
  29 #define CR                      0x012e
  30 #define TCR                     0x012f
  31 #define RCR                     0x0130
  32 #define TSR                     0x0132
  33 #define RSR                     0x0133
  34 #define CON0                    0x0135
  35 #define CON1                    0x0136
  36 #define MSR                     0x0137
  37 #define PHYADD                  0x0138
  38 #define PHYDAT                  0x0139
  39 #define PHYCNT                  0x013b
  40 #define GPPC                    0x013d
  41 #define BMCR                    0x0140
  42 #define BMSR                    0x0142
  43 #define ANAR                    0x0144
  44 #define ANLP                    0x0146
  45 #define AER                     0x0148
  46 #define CSCR                    0x014C  /* This one has the link status */
  47 #define CSCR_LINK_STATUS        (1 << 3)
  48
  49 #define IDR_EEPROM              0x1202
  50
  51 #define PHY_READ                0
  52 #define PHY_WRITE               0x20
  53 #define PHY_GO                  0x40
  54
  55 #define MII_TIMEOUT             10
  56 #define INTBUFSIZE              8
  57
  58 #define RTL8150_REQT_READ       0xc0
  59 #define RTL8150_REQT_WRITE      0x40
  60 #define RTL8150_REQ_GET_REGS    0x05
  61 #define RTL8150_REQ_SET_REGS    0x05
  62
  63
  64 /* Transmit status register errors */
  65 #define TSR_ECOL                (1<<5)
  66 #define TSR_LCOL                (1<<4)
  67 #define TSR_LOSS_CRS            (1<<3)
  68 #define TSR_JBR                 (1<<2)
  69 #define TSR_ERRORS              (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
  70 /* Receive status register errors */
  71 #define RSR_CRC                 (1<<2)
  72 #define RSR_FAE                 (1<<1)
  73 #define RSR_ERRORS              (RSR_CRC | RSR_FAE)
  74
  75 /* Media status register definitions */
  76 #define MSR_DUPLEX              (1<<4)
  77 #define MSR_SPEED               (1<<3)
  78 #define MSR_LINK                (1<<2)
  79
  80 /* Interrupt pipe data */
  81 #define INT_TSR                 0x00
  82 #define INT_RSR                 0x01
  83 #define INT_MSR                 0x02
  84 #define INT_WAKSR               0x03
  85 #define INT_TXOK_CNT            0x04
  86 #define INT_RXLOST_CNT          0x05
  87 #define INT_CRERR_CNT           0x06
  88 #define INT_COL_CNT             0x07
  89
  90 /* Transmit status register errors */
  91 #define TSR_ECOL                (1<<5)
  92 #define TSR_LCOL                (1<<4)
  93 #define TSR_LOSS_CRS            (1<<3)
  94 #define TSR_JBR                 (1<<2)
  95 #define TSR_ERRORS              (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
  96 /* Receive status register errors */
  97 #define RSR_CRC                 (1<<2)
  98 #define RSR_FAE                 (1<<1)
  99 #define RSR_ERRORS              (RSR_CRC | RSR_FAE)
 100
 101 /* Media status register definitions */
 102 #define MSR_DUPLEX              (1<<4)
 103 #define MSR_SPEED               (1<<3)
 104 #define MSR_LINK                (1<<2)
 105
 106 /* Interrupt pipe data */
 107 #define INT_TSR                 0x00
 108 #define INT_RSR                 0x01
 109 #define INT_MSR                 0x02
 110 #define INT_WAKSR               0x03
 111 #define INT_TXOK_CNT            0x04
 112 #define INT_RXLOST_CNT          0x05
 113 #define INT_CRERR_CNT           0x06
 114 #define INT_COL_CNT             0x07
 115
 116
 117 #define RTL8150_MTU             1540
 118 #define RTL8150_TX_TIMEOUT      (HZ)
 119 #define RX_SKB_POOL_SIZE        4
 120
 121 /* rtl8150 flags */
 122 #define RTL8150_HW_CRC          0
 123 #define RX_REG_SET              1
 124 #define RTL8150_UNPLUG          2
 125 #define RX_URB_FAIL             3
 126
 127 /* Define these values to match your device */
 128 #define VENDOR_ID_REALTEK               0x0bda
 129 #define VENDOR_ID_MELCO                 0x0411
 130 #define VENDOR_ID_MICRONET              0x3980
 131 #define VENDOR_ID_LONGSHINE             0x07b8
 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
 138 #undef  EEPROM_WRITE
 139
 140 /* table of devices that work with this driver */
 141 static struct usb_device_id rtl8150_table[] = {
 142         {USB_DEVICE(VENDOR_ID_REALTEK, PRODUCT_ID_RTL8150)},
 143         {USB_DEVICE(VENDOR_ID_MELCO, PRODUCT_ID_LUAKTX)},
 144         {USB_DEVICE(VENDOR_ID_MICRONET, PRODUCT_ID_SP128AR)},
 145         {USB_DEVICE(VENDOR_ID_LONGSHINE, PRODUCT_ID_LCS8138TX)},
 146         {}
 147 };
 148
 149 MODULE_DEVICE_TABLE(usb, rtl8150_table);
 150
 151 struct rtl8150 {
 152         unsigned long flags;
 153         struct usb_device *udev;
 154         struct tasklet_struct tl;
 155         struct net_device_stats stats;
 156         struct net_device *netdev;
 157         struct urb *rx_urb, *tx_urb, *intr_urb, *ctrl_urb;
 158         struct sk_buff *tx_skb, *rx_skb;
 159         struct sk_buff *rx_skb_pool[RX_SKB_POOL_SIZE];
 160         spinlock_t rx_pool_lock;
 161         struct usb_ctrlrequest dr;
 162         int intr_interval;
 163         __le16 rx_creg;
 164         u8 *intr_buff;
 165         u8 phy;
 166 };
 167
 168 typedef struct rtl8150 rtl8150_t;
 169
 170 static void fill_skb_pool(rtl8150_t *);
 171 static void free_skb_pool(rtl8150_t *);
 172 static inline struct sk_buff *pull_skb(rtl8150_t *);
 173 static void rtl8150_disconnect(struct usb_interface *intf);
 174 static int rtl8150_probe(struct usb_interface *intf,
 175                            const struct usb_device_id *id);
 176
 177 static const char driver_name [] = "rtl8150";
 178
 179 static struct usb_driver rtl8150_driver = {
 180         .name =         driver_name,
 181         .probe =        rtl8150_probe,
 182         .disconnect =   rtl8150_disconnect,
 183         .id_table =     rtl8150_table,
 184 };
 185
 186 /*
 187 **
 188 **      device related part of the code
 189 **
 190 */
 191 static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
 192 {
 193         return usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
 194                                RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
 195                                indx, 0, data, size, 500);
 196 }
 197
 198 static int set_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
 199 {
 200         return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
 201                                RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
 202                                indx, 0, data, size, 500);
 203 }
 204
 205 static void ctrl_callback(struct urb *urb, struct pt_regs *regs)
 206 {
 207         rtl8150_t *dev;
 208
 209         switch (urb->status) {
 210         case 0:
 211                 break;
 212         case -EINPROGRESS:
 213                 break;
 214         case -ENOENT:
 215                 break;
 216         default:
 217                 warn("ctrl urb status %d", urb->status);
 218         }
 219         dev = urb->context;
 220         clear_bit(RX_REG_SET, &dev->flags);
 221 }
 222
 223 static int async_set_registers(rtl8150_t * dev, u16 indx, u16 size)
 224 {
 225         int ret;
 226
 227         if (test_bit(RX_REG_SET, &dev->flags))
 228                 return -EAGAIN;
 229
 230         dev->dr.bRequestType = RTL8150_REQT_WRITE;
 231         dev->dr.bRequest = RTL8150_REQ_SET_REGS;
 232         dev->dr.wValue = cpu_to_le16(indx);
 233         dev->dr.wIndex = 0;
 234         dev->dr.wLength = cpu_to_le16(size);
 235         dev->ctrl_urb->transfer_buffer_length = size;
 236         usb_fill_control_urb(dev->ctrl_urb, dev->udev,
 237                          usb_sndctrlpipe(dev->udev, 0), (char *) &dev->dr,
 238                          &dev->rx_creg, size, ctrl_callback, dev);
 239         if ((ret = usb_submit_urb(dev->ctrl_urb, GFP_ATOMIC)))
 240                 err("control request submission failed: %d", ret);
 241         else
 242                 set_bit(RX_REG_SET, &dev->flags);
 243
 244         return ret;
 245 }
 246
 247 static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
 248 {
 249         int i;
 250         u8 data[3], tmp;
 251
 252         data[0] = phy;
 253         data[1] = data[2] = 0;
 254         tmp = indx | PHY_READ | PHY_GO;
 255         i = 0;
 256
 257         set_registers(dev, PHYADD, sizeof(data), data);
 258         set_registers(dev, PHYCNT, 1, &tmp);
 259         do {
 260                 get_registers(dev, PHYCNT, 1, data);
 261         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 262
 263         if (i < MII_TIMEOUT) {
 264                 get_registers(dev, PHYDAT, 2, data);
 265                 *reg = data[0] | (data[1] << 8);
 266                 return 0;
 267         } else
 268                 return 1;
 269 }
 270
 271 static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
 272 {
 273         int i;
 274         u8 data[3], tmp;
 275
 276         data[0] = phy;
 277         *(data + 1) = cpu_to_le16p(&reg);
 278         tmp = indx | PHY_WRITE | PHY_GO;
 279         i = 0;
 280
 281         set_registers(dev, PHYADD, sizeof(data), data);
 282         set_registers(dev, PHYCNT, 1, &tmp);
 283         do {
 284                 get_registers(dev, PHYCNT, 1, data);
 285         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 286
 287         if (i < MII_TIMEOUT)
 288                 return 0;
 289         else
 290                 return 1;
 291 }
 292
 293 static inline void set_ethernet_addr(rtl8150_t * dev)
 294 {
 295         u8 node_id[6];
 296
 297         get_registers(dev, IDR, sizeof(node_id), node_id);
 298         memcpy(dev->netdev->dev_addr, node_id, sizeof(node_id));
 299 }
 300
 301 static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
 302 {
 303         struct sockaddr *addr = p;
 304         rtl8150_t *dev = netdev_priv(netdev);
 305         int i;
 306
 307         if (netif_running(netdev))
 308                 return -EBUSY;
 309
 310         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 311         dbg("%s: Setting MAC address to ", netdev->name);
 312         for (i = 0; i < 5; i++)
 313                 dbg("%02X:", netdev->dev_addr[i]);
 314         dbg("%02X\n", netdev->dev_addr[i]);
 315         /* Set the IDR registers. */
 316         set_registers(dev, IDR, sizeof(netdev->dev_addr), netdev->dev_addr);
 317 #ifdef EEPROM_WRITE
 318         {
 319         u8 cr;
 320         /* Get the CR contents. */
 321         get_registers(dev, CR, 1, &cr);
 322         /* Set the WEPROM bit (eeprom write enable). */
 323         cr |= 0x20;
 324         set_registers(dev, CR, 1, &cr);
 325         /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
 326            so we need to split them up. */
 327         for (i = 0; i * 2 < netdev->addr_len; i++) {
 328                 set_registers(dev, IDR_EEPROM + (i * 2), 2,
 329                 netdev->dev_addr + (i * 2));
 330         }
 331         /* Clear the WEPROM bit (preventing accidental eeprom writes). */
 332         cr &= 0xdf;
 333         set_registers(dev, CR, 1, &cr);
 334         }
 335 #endif
 336         return 0;
 337 }
 338
 339 static int rtl8150_reset(rtl8150_t * dev)
 340 {
 341         u8 data = 0x10;
 342         int i = HZ;
 343
 344         set_registers(dev, CR, 1, &data);
 345         do {
 346                 get_registers(dev, CR, 1, &data);
 347         } while ((data & 0x10) && --i);
 348
 349         return (i > 0) ? 1 : 0;
 350 }
 351
 352 static int alloc_all_urbs(rtl8150_t * dev)
 353 {
 354         dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 355         if (!dev->rx_urb)
 356                 return 0;
 357         dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 358         if (!dev->tx_urb) {
 359                 usb_free_urb(dev->rx_urb);
 360                 return 0;
 361         }
 362         dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
 363         if (!dev->intr_urb) {
 364                 usb_free_urb(dev->rx_urb);
 365                 usb_free_urb(dev->tx_urb);
 366                 return 0;
 367         }
 368         dev->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
 369         if (!dev->intr_urb) {
 370                 usb_free_urb(dev->rx_urb);
 371                 usb_free_urb(dev->tx_urb);
 372                 usb_free_urb(dev->intr_urb);
 373                 return 0;
 374         }
 375
 376         return 1;
 377 }
 378
 379 static void free_all_urbs(rtl8150_t * dev)
 380 {
 381         usb_free_urb(dev->rx_urb);
 382         usb_free_urb(dev->tx_urb);
 383         usb_free_urb(dev->intr_urb);
 384         usb_free_urb(dev->ctrl_urb);
 385 }
 386
 387 static void unlink_all_urbs(rtl8150_t * dev)
 388 {
 389         usb_kill_urb(dev->rx_urb);
 390         usb_kill_urb(dev->tx_urb);
 391         usb_kill_urb(dev->intr_urb);
 392         usb_kill_urb(dev->ctrl_urb);
 393 }
 394
 395 static inline struct sk_buff *pull_skb(rtl8150_t *dev)
 396 {
 397         struct sk_buff *skb;
 398         int i;
 399
 400         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 401                 if (dev->rx_skb_pool[i]) {
 402                         skb = dev->rx_skb_pool[i];
 403                         dev->rx_skb_pool[i] = NULL;
 404                         return skb;
 405                 }
 406         }
 407         return NULL;
 408 }
 409
 410 static void read_bulk_callback(struct urb *urb, struct pt_regs *regs)
 411 {
 412         rtl8150_t *dev;
 413         unsigned pkt_len, res;
 414         struct sk_buff *skb;
 415         struct net_device *netdev;
 416         u16 rx_stat;
 417
 418         dev = urb->context;
 419         if (!dev)
 420                 return;
 421         if (test_bit(RTL8150_UNPLUG, &dev->flags))
 422                 return;
 423         netdev = dev->netdev;
 424         if (!netif_device_present(netdev))
 425                 return;
 426
 427         switch (urb->status) {
 428         case 0:
 429                 break;
 430         case -ENOENT:
 431                 return; /* the urb is in unlink state */
 432         case -ETIMEDOUT:
 433                 warn("may be reset is needed?..");
 434                 goto goon;
 435         default:
 436                 warn("Rx status %d", urb->status);
 437                 goto goon;
 438         }
 439
 440         if (!dev->rx_skb)
 441                 goto resched;
 442         /* protect against short packets (tell me why we got some?!?) */
 443         if (urb->actual_length < 4)
 444                 goto goon;
 445
 446         res = urb->actual_length;
 447         rx_stat = le16_to_cpu(*(__le16 *)(urb->transfer_buffer + res - 4));
 448         pkt_len = res - 4;
 449
 450         skb_put(dev->rx_skb, pkt_len);
 451         dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
 452         netif_rx(dev->rx_skb);
 453         dev->stats.rx_packets++;
 454         dev->stats.rx_bytes += pkt_len;
 455
 456         spin_lock(&dev->rx_pool_lock);
 457         skb = pull_skb(dev);
 458         spin_unlock(&dev->rx_pool_lock);
 459         if (!skb)
 460                 goto resched;
 461
 462         dev->rx_skb = skb;
 463 goon:
 464         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 465                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 466         if (usb_submit_urb(dev->rx_urb, GFP_ATOMIC)) {
 467                 set_bit(RX_URB_FAIL, &dev->flags);
 468                 goto resched;
 469         } else {
 470                 clear_bit(RX_URB_FAIL, &dev->flags);
 471         }
 472
 473         return;
 474 resched:
 475         tasklet_schedule(&dev->tl);
 476 }
 477
 478 static void rx_fixup(unsigned long data)
 479 {
 480         rtl8150_t *dev;
 481         struct sk_buff *skb;
 482
 483         dev = (rtl8150_t *)data;
 484
 485         spin_lock_irq(&dev->rx_pool_lock);
 486         fill_skb_pool(dev);
 487         spin_unlock_irq(&dev->rx_pool_lock);
 488         if (test_bit(RX_URB_FAIL, &dev->flags))
 489                 if (dev->rx_skb)
 490                         goto try_again;
 491         spin_lock_irq(&dev->rx_pool_lock);
 492         skb = pull_skb(dev);
 493         spin_unlock_irq(&dev->rx_pool_lock);
 494         if (skb == NULL)
 495                 goto tlsched;
 496         dev->rx_skb = skb;
 497         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 498                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 499 try_again:
 500         if (usb_submit_urb(dev->rx_urb, GFP_ATOMIC)) {
 501                 set_bit(RX_URB_FAIL, &dev->flags);
 502                 goto tlsched;
 503          } else {
 504                 clear_bit(RX_URB_FAIL, &dev->flags);
 505         }
 506
 507         return;
 508 tlsched:
 509         tasklet_schedule(&dev->tl);
 510 }
 511
 512 static void write_bulk_callback(struct urb *urb, struct pt_regs *regs)
 513 {
 514         rtl8150_t *dev;
 515
 516         dev = urb->context;
 517         if (!dev)
 518                 return;
 519         dev_kfree_skb_irq(dev->tx_skb);
 520         if (!netif_device_present(dev->netdev))
 521                 return;
 522         if (urb->status)
 523                 info("%s: Tx status %d", dev->netdev->name, urb->status);
 524         dev->netdev->trans_start = jiffies;
 525         netif_wake_queue(dev->netdev);
 526 }
 527
 528 static void intr_callback(struct urb *urb, struct pt_regs *regs)
 529 {
 530         rtl8150_t *dev;
 531         __u8 *d;
 532         int status;
 533
 534         dev = urb->context;
 535         if (!dev)
 536                 return;
 537         switch (urb->status) {
 538         case 0:                 /* success */
 539                 break;
 540         case -ECONNRESET:       /* unlink */
 541         case -ENOENT:
 542         case -ESHUTDOWN:
 543                 return;
 544         /* -EPIPE:  should clear the halt */
 545         default:
 546                 info("%s: intr status %d", dev->netdev->name, urb->status);
 547                 goto resubmit;
 548         }
 549
 550         d = urb->transfer_buffer;
 551         if (d[0] & TSR_ERRORS) {
 552                 dev->stats.tx_errors++;
 553                 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
 554                         dev->stats.tx_aborted_errors++;
 555                 if (d[INT_TSR] & TSR_LCOL)
 556                         dev->stats.tx_window_errors++;
 557                 if (d[INT_TSR] & TSR_LOSS_CRS)
 558                         dev->stats.tx_carrier_errors++;
 559         }
 560         /* Report link status changes to the network stack */
 561         if ((d[INT_MSR] & MSR_LINK) == 0) {
 562                 if (netif_carrier_ok(dev->netdev)) {
 563                         netif_carrier_off(dev->netdev);
 564                         dbg("%s: LINK LOST\n", __func__);
 565                 }
 566         } else {
 567                 if (!netif_carrier_ok(dev->netdev)) {
 568                         netif_carrier_on(dev->netdev);
 569                         dbg("%s: LINK CAME BACK\n", __func__);
 570                 }
 571         }
 572
 573 resubmit:
 574         status = usb_submit_urb (urb, SLAB_ATOMIC);
 575         if (status)
 576                 err ("can't resubmit intr, %s-%s/input0, status %d",
 577                                 dev->udev->bus->bus_name,
 578                                 dev->udev->devpath, status);
 579 }
 580
 581
 582 /*
 583 **
 584 **      network related part of the code
 585 **
 586 */
 587
 588 static void fill_skb_pool(rtl8150_t *dev)
 589 {
 590         struct sk_buff *skb;
 591         int i;
 592
 593         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 594                 if (dev->rx_skb_pool[i])
 595                         continue;
 596                 skb = dev_alloc_skb(RTL8150_MTU + 2);
 597                 if (!skb) {
 598                         return;
 599                 }
 600                 skb->dev = dev->netdev;
 601                 skb_reserve(skb, 2);
 602                 dev->rx_skb_pool[i] = skb;
 603         }
 604 }
 605
 606 static void free_skb_pool(rtl8150_t *dev)
 607 {
 608         int i;
 609
 610         for (i = 0; i < RX_SKB_POOL_SIZE; i++)
 611                 if (dev->rx_skb_pool[i])
 612                         dev_kfree_skb(dev->rx_skb_pool[i]);
 613 }
 614
 615 static int enable_net_traffic(rtl8150_t * dev)
 616 {
 617         u8 cr, tcr, rcr, msr;
 618
 619         if (!rtl8150_reset(dev)) {
 620                 warn("%s - device reset failed", __FUNCTION__);
 621         }
 622         /* RCR bit7=1 attach Rx info at the end;  =0 HW CRC (which is broken) */
 623         rcr = 0x9e;
 624         dev->rx_creg = cpu_to_le16(rcr);
 625         tcr = 0xd8;
 626         cr = 0x0c;
 627         if (!(rcr & 0x80))
 628                 set_bit(RTL8150_HW_CRC, &dev->flags);
 629         set_registers(dev, RCR, 1, &rcr);
 630         set_registers(dev, TCR, 1, &tcr);
 631         set_registers(dev, CR, 1, &cr);
 632         get_registers(dev, MSR, 1, &msr);
 633
 634         return 0;
 635 }
 636
 637 static void disable_net_traffic(rtl8150_t * dev)
 638 {
 639         u8 cr;
 640
 641         get_registers(dev, CR, 1, &cr);
 642         cr &= 0xf3;
 643         set_registers(dev, CR, 1, &cr);
 644 }
 645
 646 static struct net_device_stats *rtl8150_netdev_stats(struct net_device *dev)
 647 {
 648         return &((rtl8150_t *)netdev_priv(dev))->stats;
 649 }
 650
 651 static void rtl8150_tx_timeout(struct net_device *netdev)
 652 {
 653         rtl8150_t *dev = netdev_priv(netdev);
 654         warn("%s: Tx timeout.", netdev->name);
 655         usb_unlink_urb(dev->tx_urb);
 656         dev->stats.tx_errors++;
 657 }
 658
 659 static void rtl8150_set_multicast(struct net_device *netdev)
 660 {
 661         rtl8150_t *dev = netdev_priv(netdev);
 662         netif_stop_queue(netdev);
 663         if (netdev->flags & IFF_PROMISC) {
 664                 dev->rx_creg |= cpu_to_le16(0x0001);
 665                 info("%s: promiscuous mode", netdev->name);
 666         } else if (netdev->mc_count ||
 667                    (netdev->flags & IFF_ALLMULTI)) {
 668                 dev->rx_creg &= cpu_to_le16(0xfffe);
 669                 dev->rx_creg |= cpu_to_le16(0x0002);
 670                 info("%s: allmulti set", netdev->name);
 671         } else {
 672                 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
 673                 dev->rx_creg &= cpu_to_le16(0x00fc);
 674         }
 675         async_set_registers(dev, RCR, 2);
 676         netif_wake_queue(netdev);
 677 }
 678
 679 static int rtl8150_start_xmit(struct sk_buff *skb, struct net_device *netdev)
 680 {
 681         rtl8150_t *dev = netdev_priv(netdev);
 682         int count, res;
 683
 684         netif_stop_queue(netdev);
 685         count = (skb->len < 60) ? 60 : skb->len;
 686         count = (count & 0x3f) ? count : count + 1;
 687         dev->tx_skb = skb;
 688         usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
 689                       skb->data, count, write_bulk_callback, dev);
 690         if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
 691                 warn("failed tx_urb %d\n", res);
 692                 dev->stats.tx_errors++;
 693                 netif_start_queue(netdev);
 694         } else {
 695                 dev->stats.tx_packets++;
 696                 dev->stats.tx_bytes += skb->len;
 697                 netdev->trans_start = jiffies;
 698         }
 699
 700         return 0;
 701 }
 702
 703
 704 static void set_carrier(struct net_device *netdev)
 705 {
 706         rtl8150_t *dev = netdev_priv(netdev);
 707         short tmp;
 708
 709         get_registers(dev, CSCR, 2, &tmp);
 710         if (tmp & CSCR_LINK_STATUS)
 711                 netif_carrier_on(netdev);
 712         else
 713                 netif_carrier_off(netdev);
 714 }
 715
 716 static int rtl8150_open(struct net_device *netdev)
 717 {
 718         rtl8150_t *dev = netdev_priv(netdev);
 719         int res;
 720
 721         if (dev->rx_skb == NULL)
 722                 dev->rx_skb = pull_skb(dev);
 723         if (!dev->rx_skb)
 724                 return -ENOMEM;
 725
 726         set_registers(dev, IDR, 6, netdev->dev_addr);
 727
 728         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 729                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 730         if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL)))
 731                 warn("%s: rx_urb submit failed: %d", __FUNCTION__, res);
 732         usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
 733                      dev->intr_buff, INTBUFSIZE, intr_callback,
 734                      dev, dev->intr_interval);
 735         if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL)))
 736                 warn("%s: intr_urb submit failed: %d", __FUNCTION__, res);
 737         netif_start_queue(netdev);
 738         enable_net_traffic(dev);
 739         set_carrier(netdev);
 740
 741         return res;
 742 }
 743
 744 static int rtl8150_close(struct net_device *netdev)
 745 {
 746         rtl8150_t *dev = netdev_priv(netdev);
 747         int res = 0;
 748
 749         netif_stop_queue(netdev);
 750         if (!test_bit(RTL8150_UNPLUG, &dev->flags))
 751                 disable_net_traffic(dev);
 752         unlink_all_urbs(dev);
 753
 754         return res;
 755 }
 756
 757 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
 758 {
 759         rtl8150_t *dev = netdev_priv(netdev);
 760
 761         strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
 762         strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
 763         usb_make_path(dev->udev, info->bus_info, sizeof info->bus_info);
 764 }
 765
 766 static int rtl8150_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
 767 {
 768         rtl8150_t *dev = netdev_priv(netdev);
 769         short lpa, bmcr;
 770
 771         ecmd->supported = (SUPPORTED_10baseT_Half |
 772                           SUPPORTED_10baseT_Full |
 773                           SUPPORTED_100baseT_Half |
 774                           SUPPORTED_100baseT_Full |
 775                           SUPPORTED_Autoneg |
 776                           SUPPORTED_TP | SUPPORTED_MII);
 777         ecmd->port = PORT_TP;
 778         ecmd->transceiver = XCVR_INTERNAL;
 779         ecmd->phy_address = dev->phy;
 780         get_registers(dev, BMCR, 2, &bmcr);
 781         get_registers(dev, ANLP, 2, &lpa);
 782         if (bmcr & BMCR_ANENABLE) {
 783                 ecmd->autoneg = AUTONEG_ENABLE;
 784                 ecmd->speed = (lpa & (LPA_100HALF | LPA_100FULL)) ?
 785                              SPEED_100 : SPEED_10;
 786                 if (ecmd->speed == SPEED_100)
 787                         ecmd->duplex = (lpa & LPA_100FULL) ?
 788                             DUPLEX_FULL : DUPLEX_HALF;
 789                 else
 790                         ecmd->duplex = (lpa & LPA_10FULL) ?
 791                             DUPLEX_FULL : DUPLEX_HALF;
 792         } else {
 793                 ecmd->autoneg = AUTONEG_DISABLE;
 794                 ecmd->speed = (bmcr & BMCR_SPEED100) ?
 795                     SPEED_100 : SPEED_10;
 796                 ecmd->duplex = (bmcr & BMCR_FULLDPLX) ?
 797                     DUPLEX_FULL : DUPLEX_HALF;
 798         }
 799         return 0;
 800 }
 801
 802 static struct ethtool_ops ops = {
 803         .get_drvinfo = rtl8150_get_drvinfo,
 804         .get_settings = rtl8150_get_settings,
 805         .get_link = ethtool_op_get_link
 806 };
 807
 808 static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 809 {
 810         rtl8150_t *dev = netdev_priv(netdev);
 811         u16 *data = (u16 *) & rq->ifr_ifru;
 812         int res = 0;
 813
 814         switch (cmd) {
 815         case SIOCDEVPRIVATE:
 816                 data[0] = dev->phy;
 817         case SIOCDEVPRIVATE + 1:
 818                 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
 819                 break;
 820         case SIOCDEVPRIVATE + 2:
 821                 if (!capable(CAP_NET_ADMIN))
 822                         return -EPERM;
 823                 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
 824                 break;
 825         default:
 826                 res = -EOPNOTSUPP;
 827         }
 828
 829         return res;
 830 }
 831
 832 static int rtl8150_probe(struct usb_interface *intf,
 833                          const struct usb_device_id *id)
 834 {
 835         struct usb_device *udev = interface_to_usbdev(intf);
 836         rtl8150_t *dev;
 837         struct net_device *netdev;
 838
 839         netdev = alloc_etherdev(sizeof(rtl8150_t));
 840         if (!netdev) {
 841                 err("Out of memory");
 842                 return -ENOMEM;
 843         }
 844
 845         dev = netdev_priv(netdev);
 846         memset(dev, 0, sizeof(rtl8150_t));
 847
 848         dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
 849         if (!dev->intr_buff) {
 850                 free_netdev(netdev);
 851                 return -ENOMEM;
 852         }
 853
 854         tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
 855         spin_lock_init(&dev->rx_pool_lock);
 856
 857         dev->udev = udev;
 858         dev->netdev = netdev;
 859         SET_MODULE_OWNER(netdev);
 860         netdev->open = rtl8150_open;
 861         netdev->stop = rtl8150_close;
 862         netdev->do_ioctl = rtl8150_ioctl;
 863         netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
 864         netdev->tx_timeout = rtl8150_tx_timeout;
 865         netdev->hard_start_xmit = rtl8150_start_xmit;
 866         netdev->set_multicast_list = rtl8150_set_multicast;
 867         netdev->set_mac_address = rtl8150_set_mac_address;
 868         netdev->get_stats = rtl8150_netdev_stats;
 869         netdev->mtu = RTL8150_MTU;
 870         SET_ETHTOOL_OPS(netdev, &ops);
 871         dev->intr_interval = 100;       /* 100ms */
 872
 873         if (!alloc_all_urbs(dev)) {
 874                 err("out of memory");
 875                 goto out;
 876         }
 877         if (!rtl8150_reset(dev)) {
 878                 err("couldn't reset the device");
 879                 goto out1;
 880         }
 881         fill_skb_pool(dev);
 882         set_ethernet_addr(dev);
 883         info("%s: rtl8150 is detected", netdev->name);
 884
 885         usb_set_intfdata(intf, dev);
 886         SET_NETDEV_DEV(netdev, &intf->dev);
 887         if (register_netdev(netdev) != 0) {
 888                 err("couldn't register the device");
 889                 goto out2;
 890         }
 891         return 0;
 892
 893 out2:
 894         usb_set_intfdata(intf, NULL);
 895         free_skb_pool(dev);
 896 out1:
 897         free_all_urbs(dev);
 898 out:
 899         kfree(dev->intr_buff);
 900         free_netdev(netdev);
 901         return -EIO;
 902 }
 903
 904 static void rtl8150_disconnect(struct usb_interface *intf)
 905 {
 906         rtl8150_t *dev = usb_get_intfdata(intf);
 907
 908         usb_set_intfdata(intf, NULL);
 909         if (dev) {
 910                 set_bit(RTL8150_UNPLUG, &dev->flags);
 911                 tasklet_disable(&dev->tl);
 912                 unregister_netdev(dev->netdev);
 913                 unlink_all_urbs(dev);
 914                 free_all_urbs(dev);
 915                 free_skb_pool(dev);
 916                 if (dev->rx_skb)
 917                         dev_kfree_skb(dev->rx_skb);
 918                 kfree(dev->intr_buff);
 919                 free_netdev(dev->netdev);
 920         }
 921 }
 922
 923 static int __init usb_rtl8150_init(void)
 924 {
 925         info(DRIVER_DESC " " DRIVER_VERSION);
 926         return usb_register(&rtl8150_driver);
 927 }
 928
 929 static void __exit usb_rtl8150_exit(void)
 930 {
 931         usb_deregister(&rtl8150_driver);
 932 }
 933
 934 module_init(usb_rtl8150_init);
 935 module_exit(usb_rtl8150_exit);
 936
 937 MODULE_AUTHOR(DRIVER_AUTHOR);
 938 MODULE_DESCRIPTION(DRIVER_DESC);
 939 MODULE_LICENSE("GPL");