drivers/net/usb/rtl8150.c

   1 /*
   2  *  Copyright (c) 2002 Petko Manolov (petkan@users.sourceforge.net)
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * version 2 as published by the Free Software Foundation.
   7  */
   8
   9 #include <linux/init.h>
  10 #include <linux/signal.h>
  11 #include <linux/slab.h>
  12 #include <linux/module.h>
  13 #include <linux/netdevice.h>
  14 #include <linux/etherdevice.h>
  15 #include <linux/mii.h>
  16 #include <linux/ethtool.h>
  17 #include <linux/usb.h>
  18 #include <asm/uaccess.h>
  19
  20 /* Version Information */
  21 #define DRIVER_VERSION "v0.6.2 (2004/08/27)"
  22 #define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>"
  23 #define DRIVER_DESC "rtl8150 based usb-ethernet driver"
  24
  25 #define IDR                     0x0120
  26 #define MAR                     0x0126
  27 #define CR                      0x012e
  28 #define TCR                     0x012f
  29 #define RCR                     0x0130
  30 #define TSR                     0x0132
  31 #define RSR                     0x0133
  32 #define CON0                    0x0135
  33 #define CON1                    0x0136
  34 #define MSR                     0x0137
  35 #define PHYADD                  0x0138
  36 #define PHYDAT                  0x0139
  37 #define PHYCNT                  0x013b
  38 #define GPPC                    0x013d
  39 #define BMCR                    0x0140
  40 #define BMSR                    0x0142
  41 #define ANAR                    0x0144
  42 #define ANLP                    0x0146
  43 #define AER                     0x0148
  44 #define CSCR                    0x014C  /* This one has the link status */
  45 #define CSCR_LINK_STATUS        (1 << 3)
  46
  47 #define IDR_EEPROM              0x1202
  48
  49 #define PHY_READ                0
  50 #define PHY_WRITE               0x20
  51 #define PHY_GO                  0x40
  52
  53 #define MII_TIMEOUT             10
  54 #define INTBUFSIZE              8
  55
  56 #define RTL8150_REQT_READ       0xc0
  57 #define RTL8150_REQT_WRITE      0x40
  58 #define RTL8150_REQ_GET_REGS    0x05
  59 #define RTL8150_REQ_SET_REGS    0x05
  60
  61
  62 /* Transmit status register errors */
  63 #define TSR_ECOL                (1<<5)
  64 #define TSR_LCOL                (1<<4)
  65 #define TSR_LOSS_CRS            (1<<3)
  66 #define TSR_JBR                 (1<<2)
  67 #define TSR_ERRORS              (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
  68 /* Receive status register errors */
  69 #define RSR_CRC                 (1<<2)
  70 #define RSR_FAE                 (1<<1)
  71 #define RSR_ERRORS              (RSR_CRC | RSR_FAE)
  72
  73 /* Media status register definitions */
  74 #define MSR_DUPLEX              (1<<4)
  75 #define MSR_SPEED               (1<<3)
  76 #define MSR_LINK                (1<<2)
  77
  78 /* Interrupt pipe data */
  79 #define INT_TSR                 0x00
  80 #define INT_RSR                 0x01
  81 #define INT_MSR                 0x02
  82 #define INT_WAKSR               0x03
  83 #define INT_TXOK_CNT            0x04
  84 #define INT_RXLOST_CNT          0x05
  85 #define INT_CRERR_CNT           0x06
  86 #define INT_COL_CNT             0x07
  87
  88
  89 #define RTL8150_MTU             1540
  90 #define RTL8150_TX_TIMEOUT      (HZ)
  91 #define RX_SKB_POOL_SIZE        4
  92
  93 /* rtl8150 flags */
  94 #define RTL8150_HW_CRC          0
  95 #define RX_REG_SET              1
  96 #define RTL8150_UNPLUG          2
  97 #define RX_URB_FAIL             3
  98
  99 /* Define these values to match your device */
 100 #define VENDOR_ID_REALTEK               0x0bda
 101 #define VENDOR_ID_MELCO                 0x0411
 102 #define VENDOR_ID_MICRONET              0x3980
 103 #define VENDOR_ID_LONGSHINE             0x07b8
 104 #define VENDOR_ID_OQO                   0x1557
 105 #define VENDOR_ID_ZYXEL                 0x0586
 106
 107 #define PRODUCT_ID_RTL8150              0x8150
 108 #define PRODUCT_ID_LUAKTX               0x0012
 109 #define PRODUCT_ID_LCS8138TX            0x401a
 110 #define PRODUCT_ID_SP128AR              0x0003
 111 #define PRODUCT_ID_PRESTIGE             0x401a
 112
 113 #undef  EEPROM_WRITE
 114
 115 /* table of devices that work with this driver */
 116 static struct usb_device_id rtl8150_table[] = {
 117         {USB_DEVICE(VENDOR_ID_REALTEK, PRODUCT_ID_RTL8150)},
 118         {USB_DEVICE(VENDOR_ID_MELCO, PRODUCT_ID_LUAKTX)},
 119         {USB_DEVICE(VENDOR_ID_MICRONET, PRODUCT_ID_SP128AR)},
 120         {USB_DEVICE(VENDOR_ID_LONGSHINE, PRODUCT_ID_LCS8138TX)},
 121         {USB_DEVICE(VENDOR_ID_OQO, PRODUCT_ID_RTL8150)},
 122         {USB_DEVICE(VENDOR_ID_ZYXEL, PRODUCT_ID_PRESTIGE)},
 123         {}
 124 };
 125
 126 MODULE_DEVICE_TABLE(usb, rtl8150_table);
 127
 128 struct rtl8150 {
 129         unsigned long flags;
 130         struct usb_device *udev;
 131         struct tasklet_struct tl;
 132         struct net_device *netdev;
 133         struct urb *rx_urb, *tx_urb, *intr_urb;
 134         struct sk_buff *tx_skb, *rx_skb;
 135         struct sk_buff *rx_skb_pool[RX_SKB_POOL_SIZE];
 136         spinlock_t rx_pool_lock;
 137         struct usb_ctrlrequest dr;
 138         int intr_interval;
 139         u8 *intr_buff;
 140         u8 phy;
 141 };
 142
 143 typedef struct rtl8150 rtl8150_t;
 144
 145 struct async_req {
 146         struct usb_ctrlrequest dr;
 147         u16 rx_creg;
 148 };
 149
 150 static const char driver_name [] = "rtl8150";
 151
 152 /*
 153 **
 154 **      device related part of the code
 155 **
 156 */
 157 static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
 158 {
 159         return usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
 160                                RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
 161                                indx, 0, data, size, 500);
 162 }
 163
 164 static int set_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
 165 {
 166         return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
 167                                RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
 168                                indx, 0, data, size, 500);
 169 }
 170
 171 static void async_set_reg_cb(struct urb *urb)
 172 {
 173         struct async_req *req = (struct async_req *)urb->context;
 174         int status = urb->status;
 175
 176         if (status < 0)
 177                 dev_dbg(&urb->dev->dev, "%s failed with %d", __func__, status);
 178         kfree(req);
 179         usb_free_urb(urb);
 180 }
 181
 182 static int async_set_registers(rtl8150_t *dev, u16 indx, u16 size, u16 reg)
 183 {
 184         int res = -ENOMEM;
 185         struct urb *async_urb;
 186         struct async_req *req;
 187
 188         req = kmalloc(sizeof(struct async_req), GFP_ATOMIC);
 189         if (req == NULL)
 190                 return res;
 191         async_urb = usb_alloc_urb(0, GFP_ATOMIC);
 192         if (async_urb == NULL) {
 193                 kfree(req);
 194                 return res;
 195         }
 196         req->rx_creg = cpu_to_le16(reg);
 197         req->dr.bRequestType = RTL8150_REQT_WRITE;
 198         req->dr.bRequest = RTL8150_REQ_SET_REGS;
 199         req->dr.wIndex = 0;
 200         req->dr.wValue = cpu_to_le16(indx);
 201         req->dr.wLength = cpu_to_le16(size);
 202         usb_fill_control_urb(async_urb, dev->udev,
 203                              usb_sndctrlpipe(dev->udev, 0), (void *)&req->dr,
 204                              &req->rx_creg, size, async_set_reg_cb, req);
 205         res = usb_submit_urb(async_urb, GFP_ATOMIC);
 206         if (res) {
 207                 if (res == -ENODEV)
 208                         netif_device_detach(dev->netdev);
 209                 dev_err(&dev->udev->dev, "%s failed with %d\n", __func__, res);
 210         }
 211         return res;
 212 }
 213
 214 static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
 215 {
 216         int i;
 217         u8 data[3], tmp;
 218
 219         data[0] = phy;
 220         data[1] = data[2] = 0;
 221         tmp = indx | PHY_READ | PHY_GO;
 222         i = 0;
 223
 224         set_registers(dev, PHYADD, sizeof(data), data);
 225         set_registers(dev, PHYCNT, 1, &tmp);
 226         do {
 227                 get_registers(dev, PHYCNT, 1, data);
 228         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 229
 230         if (i <= MII_TIMEOUT) {
 231                 get_registers(dev, PHYDAT, 2, data);
 232                 *reg = data[0] | (data[1] << 8);
 233                 return 0;
 234         } else
 235                 return 1;
 236 }
 237
 238 static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
 239 {
 240         int i;
 241         u8 data[3], tmp;
 242
 243         data[0] = phy;
 244         data[1] = reg & 0xff;
 245         data[2] = (reg >> 8) & 0xff;
 246         tmp = indx | PHY_WRITE | PHY_GO;
 247         i = 0;
 248
 249         set_registers(dev, PHYADD, sizeof(data), data);
 250         set_registers(dev, PHYCNT, 1, &tmp);
 251         do {
 252                 get_registers(dev, PHYCNT, 1, data);
 253         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 254
 255         if (i <= MII_TIMEOUT)
 256                 return 0;
 257         else
 258                 return 1;
 259 }
 260
 261 static inline void set_ethernet_addr(rtl8150_t * dev)
 262 {
 263         u8 node_id[6];
 264
 265         get_registers(dev, IDR, sizeof(node_id), node_id);
 266         memcpy(dev->netdev->dev_addr, node_id, sizeof(node_id));
 267 }
 268
 269 static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
 270 {
 271         struct sockaddr *addr = p;
 272         rtl8150_t *dev = netdev_priv(netdev);
 273
 274         if (netif_running(netdev))
 275                 return -EBUSY;
 276
 277         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 278         netdev_dbg(netdev, "Setting MAC address to %pM\n", netdev->dev_addr);
 279         /* Set the IDR registers. */
 280         set_registers(dev, IDR, netdev->addr_len, netdev->dev_addr);
 281 #ifdef EEPROM_WRITE
 282         {
 283         int i;
 284         u8 cr;
 285         /* Get the CR contents. */
 286         get_registers(dev, CR, 1, &cr);
 287         /* Set the WEPROM bit (eeprom write enable). */
 288         cr |= 0x20;
 289         set_registers(dev, CR, 1, &cr);
 290         /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
 291            so we need to split them up. */
 292         for (i = 0; i * 2 < netdev->addr_len; i++) {
 293                 set_registers(dev, IDR_EEPROM + (i * 2), 2,
 294                 netdev->dev_addr + (i * 2));
 295         }
 296         /* Clear the WEPROM bit (preventing accidental eeprom writes). */
 297         cr &= 0xdf;
 298         set_registers(dev, CR, 1, &cr);
 299         }
 300 #endif
 301         return 0;
 302 }
 303
 304 static int rtl8150_reset(rtl8150_t * dev)
 305 {
 306         u8 data = 0x10;
 307         int i = HZ;
 308
 309         set_registers(dev, CR, 1, &data);
 310         do {
 311                 get_registers(dev, CR, 1, &data);
 312         } while ((data & 0x10) && --i);
 313
 314         return (i > 0) ? 1 : 0;
 315 }
 316
 317 static int alloc_all_urbs(rtl8150_t * dev)
 318 {
 319         dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 320         if (!dev->rx_urb)
 321                 return 0;
 322         dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 323         if (!dev->tx_urb) {
 324                 usb_free_urb(dev->rx_urb);
 325                 return 0;
 326         }
 327         dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
 328         if (!dev->intr_urb) {
 329                 usb_free_urb(dev->rx_urb);
 330                 usb_free_urb(dev->tx_urb);
 331                 return 0;
 332         }
 333
 334         return 1;
 335 }
 336
 337 static void free_all_urbs(rtl8150_t * dev)
 338 {
 339         usb_free_urb(dev->rx_urb);
 340         usb_free_urb(dev->tx_urb);
 341         usb_free_urb(dev->intr_urb);
 342 }
 343
 344 static void unlink_all_urbs(rtl8150_t * dev)
 345 {
 346         usb_kill_urb(dev->rx_urb);
 347         usb_kill_urb(dev->tx_urb);
 348         usb_kill_urb(dev->intr_urb);
 349 }
 350
 351 static inline struct sk_buff *pull_skb(rtl8150_t *dev)
 352 {
 353         struct sk_buff *skb;
 354         int i;
 355
 356         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 357                 if (dev->rx_skb_pool[i]) {
 358                         skb = dev->rx_skb_pool[i];
 359                         dev->rx_skb_pool[i] = NULL;
 360                         return skb;
 361                 }
 362         }
 363         return NULL;
 364 }
 365
 366 static void read_bulk_callback(struct urb *urb)
 367 {
 368         rtl8150_t *dev;
 369         unsigned pkt_len, res;
 370         struct sk_buff *skb;
 371         struct net_device *netdev;
 372         u16 rx_stat;
 373         int status = urb->status;
 374         int result;
 375
 376         dev = urb->context;
 377         if (!dev)
 378                 return;
 379         if (test_bit(RTL8150_UNPLUG, &dev->flags))
 380                 return;
 381         netdev = dev->netdev;
 382         if (!netif_device_present(netdev))
 383                 return;
 384
 385         switch (status) {
 386         case 0:
 387                 break;
 388         case -ENOENT:
 389                 return; /* the urb is in unlink state */
 390         case -ETIME:
 391                 if (printk_ratelimit())
 392                         dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
 393                 goto goon;
 394         default:
 395                 if (printk_ratelimit())
 396                         dev_warn(&urb->dev->dev, "Rx status %d\n", status);
 397                 goto goon;
 398         }
 399
 400         if (!dev->rx_skb)
 401                 goto resched;
 402         /* protect against short packets (tell me why we got some?!?) */
 403         if (urb->actual_length < 4)
 404                 goto goon;
 405
 406         res = urb->actual_length;
 407         rx_stat = le16_to_cpu(*(__le16 *)(urb->transfer_buffer + res - 4));
 408         pkt_len = res - 4;
 409
 410         skb_put(dev->rx_skb, pkt_len);
 411         dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
 412         netif_rx(dev->rx_skb);
 413         netdev->stats.rx_packets++;
 414         netdev->stats.rx_bytes += pkt_len;
 415
 416         spin_lock(&dev->rx_pool_lock);
 417         skb = pull_skb(dev);
 418         spin_unlock(&dev->rx_pool_lock);
 419         if (!skb)
 420                 goto resched;
 421
 422         dev->rx_skb = skb;
 423 goon:
 424         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 425                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 426         result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
 427         if (result == -ENODEV)
 428                 netif_device_detach(dev->netdev);
 429         else if (result) {
 430                 set_bit(RX_URB_FAIL, &dev->flags);
 431                 goto resched;
 432         } else {
 433                 clear_bit(RX_URB_FAIL, &dev->flags);
 434         }
 435
 436         return;
 437 resched:
 438         tasklet_schedule(&dev->tl);
 439 }
 440
 441 static void write_bulk_callback(struct urb *urb)
 442 {
 443         rtl8150_t *dev;
 444         int status = urb->status;
 445
 446         dev = urb->context;
 447         if (!dev)
 448                 return;
 449         dev_kfree_skb_irq(dev->tx_skb);
 450         if (!netif_device_present(dev->netdev))
 451                 return;
 452         if (status)
 453                 dev_info(&urb->dev->dev, "%s: Tx status %d\n",
 454                          dev->netdev->name, status);
 455         dev->netdev->trans_start = jiffies;
 456         netif_wake_queue(dev->netdev);
 457 }
 458
 459 static void intr_callback(struct urb *urb)
 460 {
 461         rtl8150_t *dev;
 462         __u8 *d;
 463         int status = urb->status;
 464         int res;
 465
 466         dev = urb->context;
 467         if (!dev)
 468                 return;
 469         switch (status) {
 470         case 0:                 /* success */
 471                 break;
 472         case -ECONNRESET:       /* unlink */
 473         case -ENOENT:
 474         case -ESHUTDOWN:
 475                 return;
 476         /* -EPIPE:  should clear the halt */
 477         default:
 478                 dev_info(&urb->dev->dev, "%s: intr status %d\n",
 479                          dev->netdev->name, status);
 480                 goto resubmit;
 481         }
 482
 483         d = urb->transfer_buffer;
 484         if (d[0] & TSR_ERRORS) {
 485                 dev->netdev->stats.tx_errors++;
 486                 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
 487                         dev->netdev->stats.tx_aborted_errors++;
 488                 if (d[INT_TSR] & TSR_LCOL)
 489                         dev->netdev->stats.tx_window_errors++;
 490                 if (d[INT_TSR] & TSR_LOSS_CRS)
 491                         dev->netdev->stats.tx_carrier_errors++;
 492         }
 493         /* Report link status changes to the network stack */
 494         if ((d[INT_MSR] & MSR_LINK) == 0) {
 495                 if (netif_carrier_ok(dev->netdev)) {
 496                         netif_carrier_off(dev->netdev);
 497                         netdev_dbg(dev->netdev, "%s: LINK LOST\n", __func__);
 498                 }
 499         } else {
 500                 if (!netif_carrier_ok(dev->netdev)) {
 501                         netif_carrier_on(dev->netdev);
 502                         netdev_dbg(dev->netdev, "%s: LINK CAME BACK\n", __func__);
 503                 }
 504         }
 505
 506 resubmit:
 507         res = usb_submit_urb (urb, GFP_ATOMIC);
 508         if (res == -ENODEV)
 509                 netif_device_detach(dev->netdev);
 510         else if (res)
 511                 dev_err(&dev->udev->dev,
 512                         "can't resubmit intr, %s-%s/input0, status %d\n",
 513                         dev->udev->bus->bus_name, dev->udev->devpath, res);
 514 }
 515
 516 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
 517 {
 518         rtl8150_t *dev = usb_get_intfdata(intf);
 519
 520         netif_device_detach(dev->netdev);
 521
 522         if (netif_running(dev->netdev)) {
 523                 usb_kill_urb(dev->rx_urb);
 524                 usb_kill_urb(dev->intr_urb);
 525         }
 526         return 0;
 527 }
 528
 529 static int rtl8150_resume(struct usb_interface *intf)
 530 {
 531         rtl8150_t *dev = usb_get_intfdata(intf);
 532
 533         netif_device_attach(dev->netdev);
 534         if (netif_running(dev->netdev)) {
 535                 dev->rx_urb->status = 0;
 536                 dev->rx_urb->actual_length = 0;
 537                 read_bulk_callback(dev->rx_urb);
 538
 539                 dev->intr_urb->status = 0;
 540                 dev->intr_urb->actual_length = 0;
 541                 intr_callback(dev->intr_urb);
 542         }
 543         return 0;
 544 }
 545
 546 /*
 547 **
 548 **      network related part of the code
 549 **
 550 */
 551
 552 static void fill_skb_pool(rtl8150_t *dev)
 553 {
 554         struct sk_buff *skb;
 555         int i;
 556
 557         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 558                 if (dev->rx_skb_pool[i])
 559                         continue;
 560                 skb = dev_alloc_skb(RTL8150_MTU + 2);
 561                 if (!skb) {
 562                         return;
 563                 }
 564                 skb_reserve(skb, 2);
 565                 dev->rx_skb_pool[i] = skb;
 566         }
 567 }
 568
 569 static void free_skb_pool(rtl8150_t *dev)
 570 {
 571         int i;
 572
 573         for (i = 0; i < RX_SKB_POOL_SIZE; i++)
 574                 if (dev->rx_skb_pool[i])
 575                         dev_kfree_skb(dev->rx_skb_pool[i]);
 576 }
 577
 578 static void rx_fixup(unsigned long data)
 579 {
 580         struct rtl8150 *dev = (struct rtl8150 *)data;
 581         struct sk_buff *skb;
 582         int status;
 583
 584         spin_lock_irq(&dev->rx_pool_lock);
 585         fill_skb_pool(dev);
 586         spin_unlock_irq(&dev->rx_pool_lock);
 587         if (test_bit(RX_URB_FAIL, &dev->flags))
 588                 if (dev->rx_skb)
 589                         goto try_again;
 590         spin_lock_irq(&dev->rx_pool_lock);
 591         skb = pull_skb(dev);
 592         spin_unlock_irq(&dev->rx_pool_lock);
 593         if (skb == NULL)
 594                 goto tlsched;
 595         dev->rx_skb = skb;
 596         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 597                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 598 try_again:
 599         status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
 600         if (status == -ENODEV) {
 601                 netif_device_detach(dev->netdev);
 602         } else if (status) {
 603                 set_bit(RX_URB_FAIL, &dev->flags);
 604                 goto tlsched;
 605         } else {
 606                 clear_bit(RX_URB_FAIL, &dev->flags);
 607         }
 608
 609         return;
 610 tlsched:
 611         tasklet_schedule(&dev->tl);
 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                 dev_warn(&dev->udev->dev, "device reset failed\n");
 620         }
 621         /* RCR bit7=1 attach Rx info at the end;  =0 HW CRC (which is broken) */
 622         rcr = 0x9e;
 623         tcr = 0xd8;
 624         cr = 0x0c;
 625         if (!(rcr & 0x80))
 626                 set_bit(RTL8150_HW_CRC, &dev->flags);
 627         set_registers(dev, RCR, 1, &rcr);
 628         set_registers(dev, TCR, 1, &tcr);
 629         set_registers(dev, CR, 1, &cr);
 630         get_registers(dev, MSR, 1, &msr);
 631
 632         return 0;
 633 }
 634
 635 static void disable_net_traffic(rtl8150_t * dev)
 636 {
 637         u8 cr;
 638
 639         get_registers(dev, CR, 1, &cr);
 640         cr &= 0xf3;
 641         set_registers(dev, CR, 1, &cr);
 642 }
 643
 644 static void rtl8150_tx_timeout(struct net_device *netdev)
 645 {
 646         rtl8150_t *dev = netdev_priv(netdev);
 647         dev_warn(&netdev->dev, "Tx timeout.\n");
 648         usb_unlink_urb(dev->tx_urb);
 649         netdev->stats.tx_errors++;
 650 }
 651
 652 static void rtl8150_set_multicast(struct net_device *netdev)
 653 {
 654         rtl8150_t *dev = netdev_priv(netdev);
 655         u16 rx_creg = 0x9e;
 656
 657         netif_stop_queue(netdev);
 658         if (netdev->flags & IFF_PROMISC) {
 659                 rx_creg |= 0x0001;
 660                 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
 661         } else if (!netdev_mc_empty(netdev) ||
 662                    (netdev->flags & IFF_ALLMULTI)) {
 663                 rx_creg &= 0xfffe;
 664                 rx_creg |= 0x0002;
 665                 dev_info(&netdev->dev, "%s: allmulti set\n", netdev->name);
 666         } else {
 667                 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
 668                 rx_creg &= 0x00fc;
 669         }
 670         async_set_registers(dev, RCR, sizeof(rx_creg), rx_creg);
 671         netif_wake_queue(netdev);
 672 }
 673
 674 static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb,
 675                                             struct net_device *netdev)
 676 {
 677         rtl8150_t *dev = netdev_priv(netdev);
 678         int count, res;
 679
 680         netif_stop_queue(netdev);
 681         count = (skb->len < 60) ? 60 : skb->len;
 682         count = (count & 0x3f) ? count : count + 1;
 683         dev->tx_skb = skb;
 684         usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
 685                       skb->data, count, write_bulk_callback, dev);
 686         if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
 687                 /* Can we get/handle EPIPE here? */
 688                 if (res == -ENODEV)
 689                         netif_device_detach(dev->netdev);
 690                 else {
 691                         dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
 692                         netdev->stats.tx_errors++;
 693                         netif_start_queue(netdev);
 694                 }
 695         } else {
 696                 netdev->stats.tx_packets++;
 697                 netdev->stats.tx_bytes += skb->len;
 698                 netdev->trans_start = jiffies;
 699         }
 700
 701         return NETDEV_TX_OK;
 702 }
 703
 704
 705 static void set_carrier(struct net_device *netdev)
 706 {
 707         rtl8150_t *dev = netdev_priv(netdev);
 708         short tmp;
 709
 710         get_registers(dev, CSCR, 2, &tmp);
 711         if (tmp & CSCR_LINK_STATUS)
 712                 netif_carrier_on(netdev);
 713         else
 714                 netif_carrier_off(netdev);
 715 }
 716
 717 static int rtl8150_open(struct net_device *netdev)
 718 {
 719         rtl8150_t *dev = netdev_priv(netdev);
 720         int res;
 721
 722         if (dev->rx_skb == NULL)
 723                 dev->rx_skb = pull_skb(dev);
 724         if (!dev->rx_skb)
 725                 return -ENOMEM;
 726
 727         set_registers(dev, IDR, 6, netdev->dev_addr);
 728
 729         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 730                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 731         if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
 732                 if (res == -ENODEV)
 733                         netif_device_detach(dev->netdev);
 734                 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
 735                 return res;
 736         }
 737         usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
 738                      dev->intr_buff, INTBUFSIZE, intr_callback,
 739                      dev, dev->intr_interval);
 740         if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
 741                 if (res == -ENODEV)
 742                         netif_device_detach(dev->netdev);
 743                 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
 744                 usb_kill_urb(dev->rx_urb);
 745                 return res;
 746         }
 747         enable_net_traffic(dev);
 748         set_carrier(netdev);
 749         netif_start_queue(netdev);
 750
 751         return res;
 752 }
 753
 754 static int rtl8150_close(struct net_device *netdev)
 755 {
 756         rtl8150_t *dev = netdev_priv(netdev);
 757         int res = 0;
 758
 759         netif_stop_queue(netdev);
 760         if (!test_bit(RTL8150_UNPLUG, &dev->flags))
 761                 disable_net_traffic(dev);
 762         unlink_all_urbs(dev);
 763
 764         return res;
 765 }
 766
 767 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
 768 {
 769         rtl8150_t *dev = netdev_priv(netdev);
 770
 771         strlcpy(info->driver, driver_name, sizeof(info->driver));
 772         strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
 773         usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info));
 774 }
 775
 776 static int rtl8150_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
 777 {
 778         rtl8150_t *dev = netdev_priv(netdev);
 779         short lpa, bmcr;
 780
 781         ecmd->supported = (SUPPORTED_10baseT_Half |
 782                           SUPPORTED_10baseT_Full |
 783                           SUPPORTED_100baseT_Half |
 784                           SUPPORTED_100baseT_Full |
 785                           SUPPORTED_Autoneg |
 786                           SUPPORTED_TP | SUPPORTED_MII);
 787         ecmd->port = PORT_TP;
 788         ecmd->transceiver = XCVR_INTERNAL;
 789         ecmd->phy_address = dev->phy;
 790         get_registers(dev, BMCR, 2, &bmcr);
 791         get_registers(dev, ANLP, 2, &lpa);
 792         if (bmcr & BMCR_ANENABLE) {
 793                 u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ?
 794                              SPEED_100 : SPEED_10);
 795                 ethtool_cmd_speed_set(ecmd, speed);
 796                 ecmd->autoneg = AUTONEG_ENABLE;
 797                 if (speed == SPEED_100)
 798                         ecmd->duplex = (lpa & LPA_100FULL) ?
 799                             DUPLEX_FULL : DUPLEX_HALF;
 800                 else
 801                         ecmd->duplex = (lpa & LPA_10FULL) ?
 802                             DUPLEX_FULL : DUPLEX_HALF;
 803         } else {
 804                 ecmd->autoneg = AUTONEG_DISABLE;
 805                 ethtool_cmd_speed_set(ecmd, ((bmcr & BMCR_SPEED100) ?
 806                                              SPEED_100 : SPEED_10));
 807                 ecmd->duplex = (bmcr & BMCR_FULLDPLX) ?
 808                     DUPLEX_FULL : DUPLEX_HALF;
 809         }
 810         return 0;
 811 }
 812
 813 static const struct ethtool_ops ops = {
 814         .get_drvinfo = rtl8150_get_drvinfo,
 815         .get_settings = rtl8150_get_settings,
 816         .get_link = ethtool_op_get_link
 817 };
 818
 819 static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 820 {
 821         rtl8150_t *dev = netdev_priv(netdev);
 822         u16 *data = (u16 *) & rq->ifr_ifru;
 823         int res = 0;
 824
 825         switch (cmd) {
 826         case SIOCDEVPRIVATE:
 827                 data[0] = dev->phy;
 828         case SIOCDEVPRIVATE + 1:
 829                 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
 830                 break;
 831         case SIOCDEVPRIVATE + 2:
 832                 if (!capable(CAP_NET_ADMIN))
 833                         return -EPERM;
 834                 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
 835                 break;
 836         default:
 837                 res = -EOPNOTSUPP;
 838         }
 839
 840         return res;
 841 }
 842
 843 static const struct net_device_ops rtl8150_netdev_ops = {
 844         .ndo_open               = rtl8150_open,
 845         .ndo_stop               = rtl8150_close,
 846         .ndo_do_ioctl           = rtl8150_ioctl,
 847         .ndo_start_xmit         = rtl8150_start_xmit,
 848         .ndo_tx_timeout         = rtl8150_tx_timeout,
 849         .ndo_set_rx_mode        = rtl8150_set_multicast,
 850         .ndo_set_mac_address    = rtl8150_set_mac_address,
 851
 852         .ndo_change_mtu         = eth_change_mtu,
 853         .ndo_validate_addr      = eth_validate_addr,
 854 };
 855
 856 static int rtl8150_probe(struct usb_interface *intf,
 857                          const struct usb_device_id *id)
 858 {
 859         struct usb_device *udev = interface_to_usbdev(intf);
 860         rtl8150_t *dev;
 861         struct net_device *netdev;
 862
 863         netdev = alloc_etherdev(sizeof(rtl8150_t));
 864         if (!netdev)
 865                 return -ENOMEM;
 866
 867         dev = netdev_priv(netdev);
 868
 869         dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
 870         if (!dev->intr_buff) {
 871                 free_netdev(netdev);
 872                 return -ENOMEM;
 873         }
 874
 875         tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
 876         spin_lock_init(&dev->rx_pool_lock);
 877
 878         dev->udev = udev;
 879         dev->netdev = netdev;
 880         netdev->netdev_ops = &rtl8150_netdev_ops;
 881         netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
 882         SET_ETHTOOL_OPS(netdev, &ops);
 883         dev->intr_interval = 100;       /* 100ms */
 884
 885         if (!alloc_all_urbs(dev)) {
 886                 dev_err(&intf->dev, "out of memory\n");
 887                 goto out;
 888         }
 889         if (!rtl8150_reset(dev)) {
 890                 dev_err(&intf->dev, "couldn't reset the device\n");
 891                 goto out1;
 892         }
 893         fill_skb_pool(dev);
 894         set_ethernet_addr(dev);
 895
 896         usb_set_intfdata(intf, dev);
 897         SET_NETDEV_DEV(netdev, &intf->dev);
 898         if (register_netdev(netdev) != 0) {
 899                 dev_err(&intf->dev, "couldn't register the device\n");
 900                 goto out2;
 901         }
 902
 903         dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
 904
 905         return 0;
 906
 907 out2:
 908         usb_set_intfdata(intf, NULL);
 909         free_skb_pool(dev);
 910 out1:
 911         free_all_urbs(dev);
 912 out:
 913         kfree(dev->intr_buff);
 914         free_netdev(netdev);
 915         return -EIO;
 916 }
 917
 918 static void rtl8150_disconnect(struct usb_interface *intf)
 919 {
 920         rtl8150_t *dev = usb_get_intfdata(intf);
 921
 922         usb_set_intfdata(intf, NULL);
 923         if (dev) {
 924                 set_bit(RTL8150_UNPLUG, &dev->flags);
 925                 tasklet_kill(&dev->tl);
 926                 unregister_netdev(dev->netdev);
 927                 unlink_all_urbs(dev);
 928                 free_all_urbs(dev);
 929                 free_skb_pool(dev);
 930                 if (dev->rx_skb)
 931                         dev_kfree_skb(dev->rx_skb);
 932                 kfree(dev->intr_buff);
 933                 free_netdev(dev->netdev);
 934         }
 935 }
 936
 937 static struct usb_driver rtl8150_driver = {
 938         .name           = driver_name,
 939         .probe          = rtl8150_probe,
 940         .disconnect     = rtl8150_disconnect,
 941         .id_table       = rtl8150_table,
 942         .suspend        = rtl8150_suspend,
 943         .resume         = rtl8150_resume,
 944         .disable_hub_initiated_lpm = 1,
 945 };
 946
 947 module_usb_driver(rtl8150_driver);
 948
 949 MODULE_AUTHOR(DRIVER_AUTHOR);
 950 MODULE_DESCRIPTION(DRIVER_DESC);
 951 MODULE_LICENSE("GPL");