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 "v0.6.1 (2004/03/13)"
  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         u16 rx_creg;
 164         u8 *intr_buff;
 165         u8 phy;
 166 };
 167
 168 typedef struct rtl8150 rtl8150_t;
 169
 170 static unsigned long multicast_filter_limit = 32;
 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         .owner =        THIS_MODULE,
 183         .name =         driver_name,
 184         .probe =        rtl8150_probe,
 185         .disconnect =   rtl8150_disconnect,
 186         .id_table =     rtl8150_table,
 187 };
 188
 189 /*
 190 **
 191 **      device related part of the code
 192 **
 193 */
 194 static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
 195 {
 196         return usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
 197                                RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
 198                                indx, 0, data, size, HZ / 2);
 199 }
 200
 201 static int set_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
 202 {
 203         return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
 204                                RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
 205                                indx, 0, data, size, HZ / 2);
 206 }
 207
 208 static void ctrl_callback(struct urb *urb, struct pt_regs *regs)
 209 {
 210         rtl8150_t *dev;
 211
 212         switch (urb->status) {
 213         case 0:
 214                 break;
 215         case -EINPROGRESS:
 216                 break;
 217         case -ENOENT:
 218                 break;
 219         default:
 220                 warn("ctrl urb status %d", urb->status);
 221         }
 222         dev = urb->context;
 223         clear_bit(RX_REG_SET, &dev->flags);
 224 }
 225
 226 static int async_set_registers(rtl8150_t * dev, u16 indx, u16 size)
 227 {
 228         int ret;
 229
 230         if (test_bit(RX_REG_SET, &dev->flags))
 231                 return -EAGAIN;
 232
 233         dev->dr.bRequestType = RTL8150_REQT_WRITE;
 234         dev->dr.bRequest = RTL8150_REQ_SET_REGS;
 235         dev->dr.wValue = cpu_to_le16(indx);
 236         dev->dr.wIndex = 0;
 237         dev->dr.wLength = cpu_to_le16(size);
 238         dev->ctrl_urb->transfer_buffer_length = size;
 239         usb_fill_control_urb(dev->ctrl_urb, dev->udev,
 240                          usb_sndctrlpipe(dev->udev, 0), (char *) &dev->dr,
 241                          &dev->rx_creg, size, ctrl_callback, dev);
 242         if ((ret = usb_submit_urb(dev->ctrl_urb, GFP_ATOMIC)))
 243                 err("control request submission failed: %d", ret);
 244         else
 245                 set_bit(RX_REG_SET, &dev->flags);
 246
 247         return ret;
 248 }
 249
 250 static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
 251 {
 252         int i;
 253         u8 data[3], tmp;
 254
 255         data[0] = phy;
 256         data[1] = data[2] = 0;
 257         tmp = indx | PHY_READ | PHY_GO;
 258         i = 0;
 259
 260         set_registers(dev, PHYADD, sizeof(data), data);
 261         set_registers(dev, PHYCNT, 1, &tmp);
 262         do {
 263                 get_registers(dev, PHYCNT, 1, data);
 264         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 265
 266         if (i < MII_TIMEOUT) {
 267                 get_registers(dev, PHYDAT, 2, data);
 268                 *reg = le16_to_cpup(data);
 269                 return 0;
 270         } else
 271                 return 1;
 272 }
 273
 274 static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
 275 {
 276         int i;
 277         u8 data[3], tmp;
 278
 279         data[0] = phy;
 280         *(data + 1) = cpu_to_le16p(&reg);
 281         tmp = indx | PHY_WRITE | PHY_GO;
 282         i = 0;
 283
 284         set_registers(dev, PHYADD, sizeof(data), data);
 285         set_registers(dev, PHYCNT, 1, &tmp);
 286         do {
 287                 get_registers(dev, PHYCNT, 1, data);
 288         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 289
 290         if (i < MII_TIMEOUT)
 291                 return 0;
 292         else
 293                 return 1;
 294 }
 295
 296 static inline void set_ethernet_addr(rtl8150_t * dev)
 297 {
 298         u8 node_id[6];
 299
 300         get_registers(dev, IDR, sizeof(node_id), node_id);
 301         memcpy(dev->netdev->dev_addr, node_id, sizeof(node_id));
 302 }
 303
 304 static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
 305 {
 306         struct sockaddr *addr = p;
 307         rtl8150_t *dev;
 308         int i;
 309
 310         if (netif_running(netdev))
 311                 return -EBUSY;
 312         dev = netdev->priv;
 313         if (dev == NULL) {
 314                 return -ENODEV;
 315         }
 316         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 317         dbg("%s: Setting MAC address to ", netdev->name);
 318         for (i = 0; i < 5; i++)
 319                 dbg("%02X:", netdev->dev_addr[i]);
 320         dbg("%02X\n", netdev->dev_addr[i]);
 321         /* Set the IDR registers. */
 322         set_registers(dev, IDR, sizeof(netdev->dev_addr), netdev->dev_addr);
 323 #ifdef EEPROM_WRITE
 324         {
 325         u8 cr;
 326         /* Get the CR contents. */
 327         get_registers(dev, CR, 1, &cr);
 328         /* Set the WEPROM bit (eeprom write enable). */
 329         cr |= 0x20;
 330         set_registers(dev, CR, 1, &cr);
 331         /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
 332            so we need to split them up. */
 333         for (i = 0; i * 2 < netdev->addr_len; i++) {
 334                 set_registers(dev, IDR_EEPROM + (i * 2), 2,
 335                 netdev->dev_addr + (i * 2));
 336         }
 337         /* Clear the WEPROM bit (preventing accidental eeprom writes). */
 338         cr &= 0xdf;
 339         set_registers(dev, CR, 1, &cr);
 340         }
 341 #endif
 342         return 0;
 343 }
 344
 345 static int rtl8150_reset(rtl8150_t * dev)
 346 {
 347         u8 data = 0x10;
 348         int i = HZ;
 349
 350         set_registers(dev, CR, 1, &data);
 351         do {
 352                 get_registers(dev, CR, 1, &data);
 353         } while ((data & 0x10) && --i);
 354
 355         return (i > 0) ? 1 : 0;
 356 }
 357
 358 static int alloc_all_urbs(rtl8150_t * dev)
 359 {
 360         dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 361         if (!dev->rx_urb)
 362                 return 0;
 363         dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 364         if (!dev->tx_urb) {
 365                 usb_free_urb(dev->rx_urb);
 366                 return 0;
 367         }
 368         dev->intr_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                 return 0;
 373         }
 374         dev->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
 375         if (!dev->intr_urb) {
 376                 usb_free_urb(dev->rx_urb);
 377                 usb_free_urb(dev->tx_urb);
 378                 usb_free_urb(dev->intr_urb);
 379                 return 0;
 380         }
 381
 382         return 1;
 383 }
 384
 385 static void free_all_urbs(rtl8150_t * dev)
 386 {
 387         usb_free_urb(dev->rx_urb);
 388         usb_free_urb(dev->tx_urb);
 389         usb_free_urb(dev->intr_urb);
 390         usb_free_urb(dev->ctrl_urb);
 391 }
 392
 393 static void unlink_all_urbs(rtl8150_t * dev)
 394 {
 395         usb_unlink_urb(dev->rx_urb);
 396         usb_unlink_urb(dev->tx_urb);
 397         usb_unlink_urb(dev->intr_urb);
 398         usb_unlink_urb(dev->ctrl_urb);
 399 }
 400
 401 static void read_bulk_callback(struct urb *urb, struct pt_regs *regs)
 402 {
 403         rtl8150_t *dev;
 404         unsigned pkt_len, res;
 405         struct sk_buff *skb;
 406         struct net_device *netdev;
 407         u16 rx_stat;
 408
 409         dev = urb->context;
 410         if (!dev)
 411                 return;
 412         if (test_bit(RTL8150_UNPLUG, &dev->flags))
 413                 return;
 414         netdev = dev->netdev;
 415         if (!netif_device_present(netdev))
 416                 return;
 417
 418         switch (urb->status) {
 419         case 0:
 420                 break;
 421         case -ENOENT:
 422                 return; /* the urb is in unlink state */
 423         case -ETIMEDOUT:
 424                 warn("may be reset is needed?..");
 425                 goto goon;
 426         default:
 427                 warn("Rx status %d", urb->status);
 428                 goto goon;
 429         }
 430
 431         if (!dev->rx_skb)
 432                 goto resched;
 433         /* protect against short packets (tell me why we got some?!?) */
 434         if (urb->actual_length < 4)
 435                 goto goon;
 436
 437         res = urb->actual_length;
 438         rx_stat = le16_to_cpu(*(short *)(urb->transfer_buffer + res - 4));
 439         pkt_len = res - 4;
 440
 441         skb_put(dev->rx_skb, pkt_len);
 442         dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
 443         netif_rx(dev->rx_skb);
 444         dev->stats.rx_packets++;
 445         dev->stats.rx_bytes += pkt_len;
 446
 447         spin_lock(&dev->rx_pool_lock);
 448         skb = pull_skb(dev);
 449         spin_unlock(&dev->rx_pool_lock);
 450         if (!skb)
 451                 goto resched;
 452
 453         dev->rx_skb = skb;
 454 goon:
 455         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 456                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 457         if (usb_submit_urb(dev->rx_urb, GFP_ATOMIC)) {
 458                 set_bit(RX_URB_FAIL, &dev->flags);
 459                 goto resched;
 460         } else {
 461                 clear_bit(RX_URB_FAIL, &dev->flags);
 462         }
 463
 464         return;
 465 resched:
 466         tasklet_schedule(&dev->tl);
 467 }
 468
 469 static void rx_fixup(unsigned long data)
 470 {
 471         rtl8150_t *dev;
 472         struct sk_buff *skb;
 473
 474         dev = (rtl8150_t *)data;
 475
 476         spin_lock_irq(&dev->rx_pool_lock);
 477         fill_skb_pool(dev);
 478         spin_unlock_irq(&dev->rx_pool_lock);
 479         if (test_bit(RX_URB_FAIL, &dev->flags))
 480                 if (dev->rx_skb)
 481                         goto try_again;
 482         spin_lock_irq(&dev->rx_pool_lock);
 483         skb = pull_skb(dev);
 484         spin_unlock_irq(&dev->rx_pool_lock);
 485         if (skb == NULL)
 486                 goto tlsched;
 487         dev->rx_skb = skb;
 488         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 489                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 490 try_again:
 491         if (usb_submit_urb(dev->rx_urb, GFP_ATOMIC)) {
 492                 set_bit(RX_URB_FAIL, &dev->flags);
 493                 goto tlsched;
 494          } else {
 495                 clear_bit(RX_URB_FAIL, &dev->flags);
 496         }
 497
 498         return;
 499 tlsched:
 500         tasklet_schedule(&dev->tl);
 501 }
 502
 503 static void write_bulk_callback(struct urb *urb, struct pt_regs *regs)
 504 {
 505         rtl8150_t *dev;
 506
 507         dev = urb->context;
 508         if (!dev)
 509                 return;
 510         dev_kfree_skb_irq(dev->tx_skb);
 511         if (!netif_device_present(dev->netdev))
 512                 return;
 513         if (urb->status)
 514                 info("%s: Tx status %d", dev->netdev->name, urb->status);
 515         dev->netdev->trans_start = jiffies;
 516         netif_wake_queue(dev->netdev);
 517 }
 518
 519 static void intr_callback(struct urb *urb, struct pt_regs *regs)
 520 {
 521         rtl8150_t *dev;
 522         __u8 *d;
 523         int status;
 524
 525         dev = urb->context;
 526         if (!dev)
 527                 return;
 528         switch (urb->status) {
 529         case 0:                 /* success */
 530                 break;
 531         case -ECONNRESET:       /* unlink */
 532         case -ENOENT:
 533         case -ESHUTDOWN:
 534                 return;
 535         /* -EPIPE:  should clear the halt */
 536         default:
 537                 info("%s: intr status %d", dev->netdev->name, urb->status);
 538                 goto resubmit;
 539         }
 540
 541         d = urb->transfer_buffer;
 542         if (d[0] & TSR_ERRORS) {
 543                 dev->stats.tx_errors++;
 544                 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
 545                         dev->stats.tx_aborted_errors++;
 546                 if (d[INT_TSR] & TSR_LCOL)
 547                         dev->stats.tx_window_errors++;
 548                 if (d[INT_TSR] & TSR_LOSS_CRS)
 549                         dev->stats.tx_carrier_errors++;
 550         }
 551         /* Report link status changes to the network stack */
 552         if ((d[INT_MSR] & MSR_LINK) == 0) {
 553                 if (netif_carrier_ok(dev->netdev)) {
 554                         netif_carrier_off(dev->netdev);
 555                         dbg("%s: LINK LOST\n", __func__);
 556                 }
 557         } else {
 558                 if (!netif_carrier_ok(dev->netdev)) {
 559                         netif_carrier_on(dev->netdev);
 560                         dbg("%s: LINK CAME BACK\n", __func__);
 561                 }
 562         }
 563
 564 resubmit:
 565         status = usb_submit_urb (urb, SLAB_ATOMIC);
 566         if (status)
 567                 err ("can't resubmit intr, %s-%s/input0, status %d",
 568                                 dev->udev->bus->bus_name,
 569                                 dev->udev->devpath, status);
 570 }
 571
 572
 573 /*
 574 **
 575 **      network related part of the code
 576 **
 577 */
 578
 579 static void fill_skb_pool(rtl8150_t *dev)
 580 {
 581         struct sk_buff *skb;
 582         int i;
 583
 584         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 585                 if (dev->rx_skb_pool[i])
 586                         continue;
 587                 skb = dev_alloc_skb(RTL8150_MTU + 2);
 588                 if (!skb) {
 589                         return;
 590                 }
 591                 skb->dev = dev->netdev;
 592                 skb_reserve(skb, 2);
 593                 dev->rx_skb_pool[i] = skb;
 594         }
 595 }
 596
 597 static void free_skb_pool(rtl8150_t *dev)
 598 {
 599         int i;
 600
 601         for (i = 0; i < RX_SKB_POOL_SIZE; i++)
 602                 if (dev->rx_skb_pool[i])
 603                         dev_kfree_skb(dev->rx_skb_pool[i]);
 604 }
 605
 606 static inline struct sk_buff *pull_skb(rtl8150_t *dev)
 607 {
 608         struct sk_buff *skb;
 609         int i;
 610
 611         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 612                 if (dev->rx_skb_pool[i]) {
 613                         skb = dev->rx_skb_pool[i];
 614                         dev->rx_skb_pool[i] = NULL;
 615                         return skb;
 616                 }
 617         }
 618         return NULL;
 619 }
 620
 621 static int enable_net_traffic(rtl8150_t * dev)
 622 {
 623         u8 cr, tcr, rcr, msr;
 624
 625         if (!rtl8150_reset(dev)) {
 626                 warn("%s - device reset failed", __FUNCTION__);
 627         }
 628         /* RCR bit7=1 attach Rx info at the end;  =0 HW CRC (which is broken) */
 629         rcr = 0x9e;
 630         dev->rx_creg = cpu_to_le16(rcr);
 631         tcr = 0xd8;
 632         cr = 0x0c;
 633         if (!(rcr & 0x80))
 634                 set_bit(RTL8150_HW_CRC, &dev->flags);
 635         set_registers(dev, RCR, 1, &rcr);
 636         set_registers(dev, TCR, 1, &tcr);
 637         set_registers(dev, CR, 1, &cr);
 638         get_registers(dev, MSR, 1, &msr);
 639
 640         return 0;
 641 }
 642
 643 static void disable_net_traffic(rtl8150_t * dev)
 644 {
 645         u8 cr;
 646
 647         get_registers(dev, CR, 1, &cr);
 648         cr &= 0xf3;
 649         set_registers(dev, CR, 1, &cr);
 650 }
 651
 652 static struct net_device_stats *rtl8150_netdev_stats(struct net_device *dev)
 653 {
 654         return &((rtl8150_t *) dev->priv)->stats;
 655 }
 656
 657 static void rtl8150_tx_timeout(struct net_device *netdev)
 658 {
 659         rtl8150_t *dev;
 660
 661         dev = netdev->priv;
 662         if (!dev)
 663                 return;
 664         warn("%s: Tx timeout.", netdev->name);
 665         dev->tx_urb->transfer_flags |= URB_ASYNC_UNLINK;
 666         usb_unlink_urb(dev->tx_urb);
 667         dev->stats.tx_errors++;
 668 }
 669
 670 static void rtl8150_set_multicast(struct net_device *netdev)
 671 {
 672         rtl8150_t *dev;
 673
 674         dev = netdev->priv;
 675         netif_stop_queue(netdev);
 676         if (netdev->flags & IFF_PROMISC) {
 677                 dev->rx_creg |= cpu_to_le16(0x0001);
 678                 info("%s: promiscuous mode", netdev->name);
 679         } else if ((netdev->mc_count > multicast_filter_limit) ||
 680                    (netdev->flags & IFF_ALLMULTI)) {
 681                 dev->rx_creg &= cpu_to_le16(0xfffe);
 682                 dev->rx_creg |= cpu_to_le16(0x0002);
 683                 info("%s: allmulti set", netdev->name);
 684         } else {
 685                 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
 686                 dev->rx_creg &= cpu_to_le16(0x00fc);
 687         }
 688         async_set_registers(dev, RCR, 2);
 689         netif_wake_queue(netdev);
 690 }
 691
 692 static int rtl8150_start_xmit(struct sk_buff *skb, struct net_device *netdev)
 693 {
 694         rtl8150_t *dev;
 695         int count, res;
 696
 697         netif_stop_queue(netdev);
 698         dev = netdev->priv;
 699         count = (skb->len < 60) ? 60 : skb->len;
 700         count = (count & 0x3f) ? count : count + 1;
 701         dev->tx_skb = skb;
 702         usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
 703                       skb->data, count, write_bulk_callback, dev);
 704         if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
 705                 warn("failed tx_urb %d\n", res);
 706                 dev->stats.tx_errors++;
 707                 netif_start_queue(netdev);
 708         } else {
 709                 dev->stats.tx_packets++;
 710                 dev->stats.tx_bytes += skb->len;
 711                 netdev->trans_start = jiffies;
 712         }
 713
 714         return 0;
 715 }
 716
 717
 718 static void set_carrier(struct net_device *netdev)
 719 {
 720         rtl8150_t *dev = netdev->priv;
 721         short tmp;
 722
 723         get_registers(dev, CSCR, 2, &tmp);
 724         if (tmp & CSCR_LINK_STATUS)
 725                 netif_carrier_on(netdev);
 726         else
 727                 netif_carrier_off(netdev);
 728 }
 729
 730 static int rtl8150_open(struct net_device *netdev)
 731 {
 732         rtl8150_t *dev;
 733         int res;
 734
 735         dev = netdev->priv;
 736         if (dev == NULL) {
 737                 return -ENODEV;
 738         }
 739         if (dev->rx_skb == NULL)
 740                 dev->rx_skb = pull_skb(dev);
 741         if (!dev->rx_skb)
 742                 return -ENOMEM;
 743
 744         set_registers(dev, IDR, 6, netdev->dev_addr);
 745
 746         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 747                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 748         if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL)))
 749                 warn("%s: rx_urb submit failed: %d", __FUNCTION__, res);
 750         usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
 751                      dev->intr_buff, INTBUFSIZE, intr_callback,
 752                      dev, dev->intr_interval);
 753         if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL)))
 754                 warn("%s: intr_urb submit failed: %d", __FUNCTION__, res);
 755         netif_start_queue(netdev);
 756         enable_net_traffic(dev);
 757         set_carrier(netdev);
 758
 759         return res;
 760 }
 761
 762 static int rtl8150_close(struct net_device *netdev)
 763 {
 764         rtl8150_t *dev;
 765         int res = 0;
 766
 767         dev = netdev->priv;
 768         if (!dev)
 769                 return -ENODEV;
 770
 771         netif_stop_queue(netdev);
 772         if (!test_bit(RTL8150_UNPLUG, &dev->flags))
 773                 disable_net_traffic(dev);
 774         unlink_all_urbs(dev);
 775
 776         return res;
 777 }
 778
 779 static int rtl8150_ethtool_ioctl(struct net_device *netdev, void __user *uaddr)
 780 {
 781         rtl8150_t *dev;
 782         int cmd;
 783
 784         dev = netdev->priv;
 785         if (get_user(cmd, (int __user *) uaddr))
 786                 return -EFAULT;
 787
 788         switch (cmd) {
 789         case ETHTOOL_GDRVINFO:{
 790                 struct ethtool_drvinfo info = { ETHTOOL_GDRVINFO };
 791
 792                 strncpy(info.driver, driver_name, ETHTOOL_BUSINFO_LEN);
 793                 strncpy(info.version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
 794                 usb_make_path(dev->udev, info.bus_info, sizeof info.bus_info);
 795                 if (copy_to_user(uaddr, &info, sizeof(info)))
 796                         return -EFAULT;
 797                 return 0;
 798                 }
 799         case ETHTOOL_GSET:{
 800                 struct ethtool_cmd ecmd;
 801                 short lpa, bmcr;
 802
 803                 if (copy_from_user(&ecmd, uaddr, sizeof(ecmd)))
 804                         return -EFAULT;
 805                 ecmd.supported = (SUPPORTED_10baseT_Half |
 806                                   SUPPORTED_10baseT_Full |
 807                                   SUPPORTED_100baseT_Half |
 808                                   SUPPORTED_100baseT_Full |
 809                                   SUPPORTED_Autoneg |
 810                                   SUPPORTED_TP | SUPPORTED_MII);
 811                 ecmd.port = PORT_TP;
 812                 ecmd.transceiver = XCVR_INTERNAL;
 813                 ecmd.phy_address = dev->phy;
 814                 get_registers(dev, BMCR, 2, &bmcr);
 815                 get_registers(dev, ANLP, 2, &lpa);
 816                 if (bmcr & BMCR_ANENABLE) {
 817                         ecmd.autoneg = AUTONEG_ENABLE;
 818                         ecmd.speed = (lpa & (LPA_100HALF | LPA_100FULL)) ?
 819                                      SPEED_100 : SPEED_10;
 820                         if (ecmd.speed == SPEED_100)
 821                                 ecmd.duplex = (lpa & LPA_100FULL) ?
 822                                     DUPLEX_FULL : DUPLEX_HALF;
 823                         else
 824                                 ecmd.duplex = (lpa & LPA_10FULL) ?
 825                                     DUPLEX_FULL : DUPLEX_HALF;
 826                 } else {
 827                         ecmd.autoneg = AUTONEG_DISABLE;
 828                         ecmd.speed = (bmcr & BMCR_SPEED100) ?
 829                             SPEED_100 : SPEED_10;
 830                         ecmd.duplex = (bmcr & BMCR_FULLDPLX) ?
 831                             DUPLEX_FULL : DUPLEX_HALF;
 832                 }
 833                 if (copy_to_user(uaddr, &ecmd, sizeof(ecmd)))
 834                         return -EFAULT;
 835                 return 0;
 836                 }
 837         case ETHTOOL_SSET:
 838                 return -ENOTSUPP;
 839         case ETHTOOL_GLINK:{
 840                 struct ethtool_value edata = { ETHTOOL_GLINK };
 841
 842                 edata.data = netif_carrier_ok(netdev);
 843                 if (copy_to_user(uaddr, &edata, sizeof(edata)))
 844                         return -EFAULT;
 845                 return 0;
 846                 }
 847         default:
 848                 return -EOPNOTSUPP;
 849         }
 850 }
 851
 852 static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 853 {
 854         rtl8150_t *dev;
 855         u16 *data;
 856         int res;
 857
 858         dev = netdev->priv;
 859         data = (u16 *) & rq->ifr_ifru;
 860         res = 0;
 861
 862         switch (cmd) {
 863         case SIOCETHTOOL:
 864                 res = rtl8150_ethtool_ioctl(netdev, rq->ifr_data);
 865                 break;
 866         case SIOCDEVPRIVATE:
 867                 data[0] = dev->phy;
 868         case SIOCDEVPRIVATE + 1:
 869                 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
 870                 break;
 871         case SIOCDEVPRIVATE + 2:
 872                 if (!capable(CAP_NET_ADMIN))
 873                         return -EPERM;
 874                 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
 875                 break;
 876         default:
 877                 res = -EOPNOTSUPP;
 878         }
 879
 880         return res;
 881 }
 882
 883 static int rtl8150_probe(struct usb_interface *intf,
 884                          const struct usb_device_id *id)
 885 {
 886         struct usb_device *udev = interface_to_usbdev(intf);
 887         rtl8150_t *dev;
 888         struct net_device *netdev;
 889
 890         dev = kmalloc(sizeof(rtl8150_t), GFP_KERNEL);
 891         if (!dev) {
 892                 err("Out of memory");
 893                 return -ENOMEM;
 894         } else
 895                 memset(dev, 0, sizeof(rtl8150_t));
 896
 897         dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
 898         if (!dev->intr_buff) {
 899                 kfree(dev);
 900                 return -ENOMEM;
 901         }
 902         netdev = alloc_etherdev(0);
 903         if (!netdev) {
 904                 kfree(dev->intr_buff);
 905                 kfree(dev);
 906                 err("Oh boy, out of memory again?!?");
 907                 return -ENOMEM;
 908         }
 909
 910         tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
 911         spin_lock_init(&dev->rx_pool_lock);
 912
 913         dev->udev = udev;
 914         dev->netdev = netdev;
 915         SET_MODULE_OWNER(netdev);
 916         netdev->priv = dev;
 917         netdev->open = rtl8150_open;
 918         netdev->stop = rtl8150_close;
 919         netdev->do_ioctl = rtl8150_ioctl;
 920         netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
 921         netdev->tx_timeout = rtl8150_tx_timeout;
 922         netdev->hard_start_xmit = rtl8150_start_xmit;
 923         netdev->set_multicast_list = rtl8150_set_multicast;
 924         netdev->set_mac_address = rtl8150_set_mac_address;
 925         netdev->get_stats = rtl8150_netdev_stats;
 926         netdev->mtu = RTL8150_MTU;
 927         dev->intr_interval = 100;       /* 100ms */
 928
 929         if (!alloc_all_urbs(dev)) {
 930                 err("out of memory");
 931                 goto out;
 932         }
 933         if (!rtl8150_reset(dev)) {
 934                 err("couldn't reset the device");
 935                 goto out1;
 936         }
 937         fill_skb_pool(dev);
 938         set_ethernet_addr(dev);
 939         info("%s: rtl8150 is detected", netdev->name);
 940
 941         usb_set_intfdata(intf, dev);
 942         SET_NETDEV_DEV(netdev, &intf->dev);
 943         if (register_netdev(netdev) != 0) {
 944                 err("couldn't register the device");
 945                 goto out2;
 946         }
 947         return 0;
 948
 949 out2:
 950         usb_set_intfdata(intf, NULL);
 951         free_skb_pool(dev);
 952 out1:
 953         free_all_urbs(dev);
 954 out:
 955         kfree(dev->intr_buff);
 956         free_netdev(netdev);
 957         kfree(dev);
 958         return -EIO;
 959 }
 960
 961 static void rtl8150_disconnect(struct usb_interface *intf)
 962 {
 963         rtl8150_t *dev = usb_get_intfdata(intf);
 964
 965         usb_set_intfdata(intf, NULL);
 966         if (dev) {
 967                 set_bit(RTL8150_UNPLUG, &dev->flags);
 968                 unregister_netdev(dev->netdev);
 969                 unlink_all_urbs(dev);
 970                 free_all_urbs(dev);
 971                 free_skb_pool(dev);
 972                 if (dev->rx_skb)
 973                         dev_kfree_skb(dev->rx_skb);
 974                 free_netdev(dev->netdev);
 975                 kfree(dev->intr_buff);
 976                 kfree(dev);
 977         }
 978 }
 979
 980 static int __init usb_rtl8150_init(void)
 981 {
 982         info(DRIVER_DESC " " DRIVER_VERSION);
 983         return usb_register(&rtl8150_driver);
 984 }
 985
 986 static void __exit usb_rtl8150_exit(void)
 987 {
 988         usb_deregister(&rtl8150_driver);
 989 }
 990
 991 module_init(usb_rtl8150_init);
 992 module_exit(usb_rtl8150_exit);
 993
 994 MODULE_AUTHOR(DRIVER_AUTHOR);
 995 MODULE_DESCRIPTION(DRIVER_DESC);
 996 MODULE_LICENSE("GPL");