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/signal.h>
  10 #include <linux/slab.h>
  11 #include <linux/module.h>
  12 #include <linux/netdevice.h>
  13 #include <linux/etherdevice.h>
  14 #include <linux/mii.h>
  15 #include <linux/ethtool.h>
  16 #include <linux/usb.h>
  17 #include <linux/uaccess.h>
  18
  19 /* Version Information */
  20 #define DRIVER_VERSION "v0.6.2 (2004/08/27)"
  21 #define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>"
  22 #define DRIVER_DESC "rtl8150 based usb-ethernet driver"
  23
  24 #define IDR                     0x0120
  25 #define MAR                     0x0126
  26 #define CR                      0x012e
  27 #define TCR                     0x012f
  28 #define RCR                     0x0130
  29 #define TSR                     0x0132
  30 #define RSR                     0x0133
  31 #define CON0                    0x0135
  32 #define CON1                    0x0136
  33 #define MSR                     0x0137
  34 #define PHYADD                  0x0138
  35 #define PHYDAT                  0x0139
  36 #define PHYCNT                  0x013b
  37 #define GPPC                    0x013d
  38 #define BMCR                    0x0140
  39 #define BMSR                    0x0142
  40 #define ANAR                    0x0144
  41 #define ANLP                    0x0146
  42 #define AER                     0x0148
  43 #define CSCR                    0x014C  /* This one has the link status */
  44 #define CSCR_LINK_STATUS        (1 << 3)
  45
  46 #define IDR_EEPROM              0x1202
  47
  48 #define PHY_READ                0
  49 #define PHY_WRITE               0x20
  50 #define PHY_GO                  0x40
  51
  52 #define MII_TIMEOUT             10
  53 #define INTBUFSIZE              8
  54
  55 #define RTL8150_REQT_READ       0xc0
  56 #define RTL8150_REQT_WRITE      0x40
  57 #define RTL8150_REQ_GET_REGS    0x05
  58 #define RTL8150_REQ_SET_REGS    0x05
  59
  60
  61 /* Transmit status register errors */
  62 #define TSR_ECOL                (1<<5)
  63 #define TSR_LCOL                (1<<4)
  64 #define TSR_LOSS_CRS            (1<<3)
  65 #define TSR_JBR                 (1<<2)
  66 #define TSR_ERRORS              (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
  67 /* Receive status register errors */
  68 #define RSR_CRC                 (1<<2)
  69 #define RSR_FAE                 (1<<1)
  70 #define RSR_ERRORS              (RSR_CRC | RSR_FAE)
  71
  72 /* Media status register definitions */
  73 #define MSR_DUPLEX              (1<<4)
  74 #define MSR_SPEED               (1<<3)
  75 #define MSR_LINK                (1<<2)
  76
  77 /* Interrupt pipe data */
  78 #define INT_TSR                 0x00
  79 #define INT_RSR                 0x01
  80 #define INT_MSR                 0x02
  81 #define INT_WAKSR               0x03
  82 #define INT_TXOK_CNT            0x04
  83 #define INT_RXLOST_CNT          0x05
  84 #define INT_CRERR_CNT           0x06
  85 #define INT_COL_CNT             0x07
  86
  87
  88 #define RTL8150_MTU             1540
  89 #define RTL8150_TX_TIMEOUT      (HZ)
  90 #define RX_SKB_POOL_SIZE        4
  91
  92 /* rtl8150 flags */
  93 #define RTL8150_HW_CRC          0
  94 #define RX_REG_SET              1
  95 #define RTL8150_UNPLUG          2
  96 #define RX_URB_FAIL             3
  97
  98 /* Define these values to match your device */
  99 #define VENDOR_ID_REALTEK               0x0bda
 100 #define VENDOR_ID_MELCO                 0x0411
 101 #define VENDOR_ID_MICRONET              0x3980
 102 #define VENDOR_ID_LONGSHINE             0x07b8
 103 #define VENDOR_ID_OQO                   0x1557
 104 #define VENDOR_ID_ZYXEL                 0x0586
 105
 106 #define PRODUCT_ID_RTL8150              0x8150
 107 #define PRODUCT_ID_LUAKTX               0x0012
 108 #define PRODUCT_ID_LCS8138TX            0x401a
 109 #define PRODUCT_ID_SP128AR              0x0003
 110 #define PRODUCT_ID_PRESTIGE             0x401a
 111
 112 #undef  EEPROM_WRITE
 113
 114 /* table of devices that work with this driver */
 115 static const struct usb_device_id rtl8150_table[] = {
 116         {USB_DEVICE(VENDOR_ID_REALTEK, PRODUCT_ID_RTL8150)},
 117         {USB_DEVICE(VENDOR_ID_MELCO, PRODUCT_ID_LUAKTX)},
 118         {USB_DEVICE(VENDOR_ID_MICRONET, PRODUCT_ID_SP128AR)},
 119         {USB_DEVICE(VENDOR_ID_LONGSHINE, PRODUCT_ID_LCS8138TX)},
 120         {USB_DEVICE(VENDOR_ID_OQO, PRODUCT_ID_RTL8150)},
 121         {USB_DEVICE(VENDOR_ID_ZYXEL, PRODUCT_ID_PRESTIGE)},
 122         {}
 123 };
 124
 125 MODULE_DEVICE_TABLE(usb, rtl8150_table);
 126
 127 struct rtl8150 {
 128         unsigned long flags;
 129         struct usb_device *udev;
 130         struct tasklet_struct tl;
 131         struct net_device *netdev;
 132         struct urb *rx_urb, *tx_urb, *intr_urb;
 133         struct sk_buff *tx_skb, *rx_skb;
 134         struct sk_buff *rx_skb_pool[RX_SKB_POOL_SIZE];
 135         spinlock_t rx_pool_lock;
 136         struct usb_ctrlrequest dr;
 137         int intr_interval;
 138         u8 *intr_buff;
 139         u8 phy;
 140 };
 141
 142 typedef struct rtl8150 rtl8150_t;
 143
 144 struct async_req {
 145         struct usb_ctrlrequest dr;
 146         u16 rx_creg;
 147 };
 148
 149 static const char driver_name [] = "rtl8150";
 150
 151 /*
 152 **
 153 **      device related part of the code
 154 **
 155 */
 156 static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
 157 {
 158         void *buf;
 159         int ret;
 160
 161         buf = kmalloc(size, GFP_NOIO);
 162         if (!buf)
 163                 return -ENOMEM;
 164
 165         ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
 166                               RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
 167                               indx, 0, buf, size, 500);
 168         if (ret > 0 && ret <= size)
 169                 memcpy(data, buf, ret);
 170         kfree(buf);
 171         return ret;
 172 }
 173
 174 static int set_registers(rtl8150_t * dev, u16 indx, u16 size, const void *data)
 175 {
 176         void *buf;
 177         int ret;
 178
 179         buf = kmemdup(data, size, GFP_NOIO);
 180         if (!buf)
 181                 return -ENOMEM;
 182
 183         ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
 184                               RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
 185                               indx, 0, buf, size, 500);
 186         kfree(buf);
 187         return ret;
 188 }
 189
 190 static void async_set_reg_cb(struct urb *urb)
 191 {
 192         struct async_req *req = (struct async_req *)urb->context;
 193         int status = urb->status;
 194
 195         if (status < 0)
 196                 dev_dbg(&urb->dev->dev, "%s failed with %d", __func__, status);
 197         kfree(req);
 198         usb_free_urb(urb);
 199 }
 200
 201 static int async_set_registers(rtl8150_t *dev, u16 indx, u16 size, u16 reg)
 202 {
 203         int res = -ENOMEM;
 204         struct urb *async_urb;
 205         struct async_req *req;
 206
 207         req = kmalloc(sizeof(struct async_req), GFP_ATOMIC);
 208         if (req == NULL)
 209                 return res;
 210         async_urb = usb_alloc_urb(0, GFP_ATOMIC);
 211         if (async_urb == NULL) {
 212                 kfree(req);
 213                 return res;
 214         }
 215         req->rx_creg = cpu_to_le16(reg);
 216         req->dr.bRequestType = RTL8150_REQT_WRITE;
 217         req->dr.bRequest = RTL8150_REQ_SET_REGS;
 218         req->dr.wIndex = 0;
 219         req->dr.wValue = cpu_to_le16(indx);
 220         req->dr.wLength = cpu_to_le16(size);
 221         usb_fill_control_urb(async_urb, dev->udev,
 222                              usb_sndctrlpipe(dev->udev, 0), (void *)&req->dr,
 223                              &req->rx_creg, size, async_set_reg_cb, req);
 224         res = usb_submit_urb(async_urb, GFP_ATOMIC);
 225         if (res) {
 226                 if (res == -ENODEV)
 227                         netif_device_detach(dev->netdev);
 228                 dev_err(&dev->udev->dev, "%s failed with %d\n", __func__, res);
 229         }
 230         return res;
 231 }
 232
 233 static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
 234 {
 235         int i;
 236         u8 data[3], tmp;
 237
 238         data[0] = phy;
 239         data[1] = data[2] = 0;
 240         tmp = indx | PHY_READ | PHY_GO;
 241         i = 0;
 242
 243         set_registers(dev, PHYADD, sizeof(data), data);
 244         set_registers(dev, PHYCNT, 1, &tmp);
 245         do {
 246                 get_registers(dev, PHYCNT, 1, data);
 247         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 248
 249         if (i <= MII_TIMEOUT) {
 250                 get_registers(dev, PHYDAT, 2, data);
 251                 *reg = data[0] | (data[1] << 8);
 252                 return 0;
 253         } else
 254                 return 1;
 255 }
 256
 257 static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
 258 {
 259         int i;
 260         u8 data[3], tmp;
 261
 262         data[0] = phy;
 263         data[1] = reg & 0xff;
 264         data[2] = (reg >> 8) & 0xff;
 265         tmp = indx | PHY_WRITE | PHY_GO;
 266         i = 0;
 267
 268         set_registers(dev, PHYADD, sizeof(data), data);
 269         set_registers(dev, PHYCNT, 1, &tmp);
 270         do {
 271                 get_registers(dev, PHYCNT, 1, data);
 272         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 273
 274         if (i <= MII_TIMEOUT)
 275                 return 0;
 276         else
 277                 return 1;
 278 }
 279
 280 static void set_ethernet_addr(rtl8150_t *dev)
 281 {
 282         u8 node_id[ETH_ALEN];
 283         int ret;
 284
 285         ret = get_registers(dev, IDR, sizeof(node_id), node_id);
 286
 287         if (ret == sizeof(node_id)) {
 288                 ether_addr_copy(dev->netdev->dev_addr, node_id);
 289         } else {
 290                 eth_hw_addr_random(dev->netdev);
 291                 netdev_notice(dev->netdev, "Assigned a random MAC address: %pM\n",
 292                               dev->netdev->dev_addr);
 293         }
 294 }
 295
 296 static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
 297 {
 298         struct sockaddr *addr = p;
 299         rtl8150_t *dev = netdev_priv(netdev);
 300
 301         if (netif_running(netdev))
 302                 return -EBUSY;
 303
 304         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 305         netdev_dbg(netdev, "Setting MAC address to %pM\n", netdev->dev_addr);
 306         /* Set the IDR registers. */
 307         set_registers(dev, IDR, netdev->addr_len, netdev->dev_addr);
 308 #ifdef EEPROM_WRITE
 309         {
 310         int i;
 311         u8 cr;
 312         /* Get the CR contents. */
 313         get_registers(dev, CR, 1, &cr);
 314         /* Set the WEPROM bit (eeprom write enable). */
 315         cr |= 0x20;
 316         set_registers(dev, CR, 1, &cr);
 317         /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
 318            so we need to split them up. */
 319         for (i = 0; i * 2 < netdev->addr_len; i++) {
 320                 set_registers(dev, IDR_EEPROM + (i * 2), 2,
 321                 netdev->dev_addr + (i * 2));
 322         }
 323         /* Clear the WEPROM bit (preventing accidental eeprom writes). */
 324         cr &= 0xdf;
 325         set_registers(dev, CR, 1, &cr);
 326         }
 327 #endif
 328         return 0;
 329 }
 330
 331 static int rtl8150_reset(rtl8150_t * dev)
 332 {
 333         u8 data = 0x10;
 334         int i = HZ;
 335
 336         set_registers(dev, CR, 1, &data);
 337         do {
 338                 get_registers(dev, CR, 1, &data);
 339         } while ((data & 0x10) && --i);
 340
 341         return (i > 0) ? 1 : 0;
 342 }
 343
 344 static int alloc_all_urbs(rtl8150_t * dev)
 345 {
 346         dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 347         if (!dev->rx_urb)
 348                 return 0;
 349         dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 350         if (!dev->tx_urb) {
 351                 usb_free_urb(dev->rx_urb);
 352                 return 0;
 353         }
 354         dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
 355         if (!dev->intr_urb) {
 356                 usb_free_urb(dev->rx_urb);
 357                 usb_free_urb(dev->tx_urb);
 358                 return 0;
 359         }
 360
 361         return 1;
 362 }
 363
 364 static void free_all_urbs(rtl8150_t * dev)
 365 {
 366         usb_free_urb(dev->rx_urb);
 367         usb_free_urb(dev->tx_urb);
 368         usb_free_urb(dev->intr_urb);
 369 }
 370
 371 static void unlink_all_urbs(rtl8150_t * dev)
 372 {
 373         usb_kill_urb(dev->rx_urb);
 374         usb_kill_urb(dev->tx_urb);
 375         usb_kill_urb(dev->intr_urb);
 376 }
 377
 378 static inline struct sk_buff *pull_skb(rtl8150_t *dev)
 379 {
 380         struct sk_buff *skb;
 381         int i;
 382
 383         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 384                 if (dev->rx_skb_pool[i]) {
 385                         skb = dev->rx_skb_pool[i];
 386                         dev->rx_skb_pool[i] = NULL;
 387                         return skb;
 388                 }
 389         }
 390         return NULL;
 391 }
 392
 393 static void read_bulk_callback(struct urb *urb)
 394 {
 395         rtl8150_t *dev;
 396         unsigned pkt_len, res;
 397         struct sk_buff *skb;
 398         struct net_device *netdev;
 399         u16 rx_stat;
 400         int status = urb->status;
 401         int result;
 402         unsigned long flags;
 403
 404         dev = urb->context;
 405         if (!dev)
 406                 return;
 407         if (test_bit(RTL8150_UNPLUG, &dev->flags))
 408                 return;
 409         netdev = dev->netdev;
 410         if (!netif_device_present(netdev))
 411                 return;
 412
 413         switch (status) {
 414         case 0:
 415                 break;
 416         case -ENOENT:
 417                 return; /* the urb is in unlink state */
 418         case -ETIME:
 419                 if (printk_ratelimit())
 420                         dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
 421                 goto goon;
 422         default:
 423                 if (printk_ratelimit())
 424                         dev_warn(&urb->dev->dev, "Rx status %d\n", status);
 425                 goto goon;
 426         }
 427
 428         if (!dev->rx_skb)
 429                 goto resched;
 430         /* protect against short packets (tell me why we got some?!?) */
 431         if (urb->actual_length < 4)
 432                 goto goon;
 433
 434         res = urb->actual_length;
 435         rx_stat = le16_to_cpu(*(__le16 *)(urb->transfer_buffer + res - 4));
 436         pkt_len = res - 4;
 437
 438         skb_put(dev->rx_skb, pkt_len);
 439         dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
 440         netif_rx(dev->rx_skb);
 441         netdev->stats.rx_packets++;
 442         netdev->stats.rx_bytes += pkt_len;
 443
 444         spin_lock_irqsave(&dev->rx_pool_lock, flags);
 445         skb = pull_skb(dev);
 446         spin_unlock_irqrestore(&dev->rx_pool_lock, flags);
 447         if (!skb)
 448                 goto resched;
 449
 450         dev->rx_skb = skb;
 451 goon:
 452         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 453                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 454         result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
 455         if (result == -ENODEV)
 456                 netif_device_detach(dev->netdev);
 457         else if (result) {
 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 write_bulk_callback(struct urb *urb)
 470 {
 471         rtl8150_t *dev;
 472         int status = urb->status;
 473
 474         dev = urb->context;
 475         if (!dev)
 476                 return;
 477         dev_kfree_skb_irq(dev->tx_skb);
 478         if (!netif_device_present(dev->netdev))
 479                 return;
 480         if (status)
 481                 dev_info(&urb->dev->dev, "%s: Tx status %d\n",
 482                          dev->netdev->name, status);
 483         netif_trans_update(dev->netdev);
 484         netif_wake_queue(dev->netdev);
 485 }
 486
 487 static void intr_callback(struct urb *urb)
 488 {
 489         rtl8150_t *dev;
 490         __u8 *d;
 491         int status = urb->status;
 492         int res;
 493
 494         dev = urb->context;
 495         if (!dev)
 496                 return;
 497         switch (status) {
 498         case 0:                 /* success */
 499                 break;
 500         case -ECONNRESET:       /* unlink */
 501         case -ENOENT:
 502         case -ESHUTDOWN:
 503                 return;
 504         /* -EPIPE:  should clear the halt */
 505         default:
 506                 dev_info(&urb->dev->dev, "%s: intr status %d\n",
 507                          dev->netdev->name, status);
 508                 goto resubmit;
 509         }
 510
 511         d = urb->transfer_buffer;
 512         if (d[0] & TSR_ERRORS) {
 513                 dev->netdev->stats.tx_errors++;
 514                 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
 515                         dev->netdev->stats.tx_aborted_errors++;
 516                 if (d[INT_TSR] & TSR_LCOL)
 517                         dev->netdev->stats.tx_window_errors++;
 518                 if (d[INT_TSR] & TSR_LOSS_CRS)
 519                         dev->netdev->stats.tx_carrier_errors++;
 520         }
 521         /* Report link status changes to the network stack */
 522         if ((d[INT_MSR] & MSR_LINK) == 0) {
 523                 if (netif_carrier_ok(dev->netdev)) {
 524                         netif_carrier_off(dev->netdev);
 525                         netdev_dbg(dev->netdev, "%s: LINK LOST\n", __func__);
 526                 }
 527         } else {
 528                 if (!netif_carrier_ok(dev->netdev)) {
 529                         netif_carrier_on(dev->netdev);
 530                         netdev_dbg(dev->netdev, "%s: LINK CAME BACK\n", __func__);
 531                 }
 532         }
 533
 534 resubmit:
 535         res = usb_submit_urb (urb, GFP_ATOMIC);
 536         if (res == -ENODEV)
 537                 netif_device_detach(dev->netdev);
 538         else if (res)
 539                 dev_err(&dev->udev->dev,
 540                         "can't resubmit intr, %s-%s/input0, status %d\n",
 541                         dev->udev->bus->bus_name, dev->udev->devpath, res);
 542 }
 543
 544 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
 545 {
 546         rtl8150_t *dev = usb_get_intfdata(intf);
 547
 548         netif_device_detach(dev->netdev);
 549
 550         if (netif_running(dev->netdev)) {
 551                 usb_kill_urb(dev->rx_urb);
 552                 usb_kill_urb(dev->intr_urb);
 553         }
 554         return 0;
 555 }
 556
 557 static int rtl8150_resume(struct usb_interface *intf)
 558 {
 559         rtl8150_t *dev = usb_get_intfdata(intf);
 560
 561         netif_device_attach(dev->netdev);
 562         if (netif_running(dev->netdev)) {
 563                 dev->rx_urb->status = 0;
 564                 dev->rx_urb->actual_length = 0;
 565                 read_bulk_callback(dev->rx_urb);
 566
 567                 dev->intr_urb->status = 0;
 568                 dev->intr_urb->actual_length = 0;
 569                 intr_callback(dev->intr_urb);
 570         }
 571         return 0;
 572 }
 573
 574 /*
 575 **
 576 **      network related part of the code
 577 **
 578 */
 579
 580 static void fill_skb_pool(rtl8150_t *dev)
 581 {
 582         struct sk_buff *skb;
 583         int i;
 584
 585         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 586                 if (dev->rx_skb_pool[i])
 587                         continue;
 588                 skb = dev_alloc_skb(RTL8150_MTU + 2);
 589                 if (!skb) {
 590                         return;
 591                 }
 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 void rx_fixup(unsigned long data)
 607 {
 608         struct rtl8150 *dev = (struct rtl8150 *)data;
 609         struct sk_buff *skb;
 610         int status;
 611
 612         spin_lock_irq(&dev->rx_pool_lock);
 613         fill_skb_pool(dev);
 614         spin_unlock_irq(&dev->rx_pool_lock);
 615         if (test_bit(RX_URB_FAIL, &dev->flags))
 616                 if (dev->rx_skb)
 617                         goto try_again;
 618         spin_lock_irq(&dev->rx_pool_lock);
 619         skb = pull_skb(dev);
 620         spin_unlock_irq(&dev->rx_pool_lock);
 621         if (skb == NULL)
 622                 goto tlsched;
 623         dev->rx_skb = skb;
 624         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 625                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 626 try_again:
 627         status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
 628         if (status == -ENODEV) {
 629                 netif_device_detach(dev->netdev);
 630         } else if (status) {
 631                 set_bit(RX_URB_FAIL, &dev->flags);
 632                 goto tlsched;
 633         } else {
 634                 clear_bit(RX_URB_FAIL, &dev->flags);
 635         }
 636
 637         return;
 638 tlsched:
 639         tasklet_schedule(&dev->tl);
 640 }
 641
 642 static int enable_net_traffic(rtl8150_t * dev)
 643 {
 644         u8 cr, tcr, rcr, msr;
 645
 646         if (!rtl8150_reset(dev)) {
 647                 dev_warn(&dev->udev->dev, "device reset failed\n");
 648         }
 649         /* RCR bit7=1 attach Rx info at the end;  =0 HW CRC (which is broken) */
 650         rcr = 0x9e;
 651         tcr = 0xd8;
 652         cr = 0x0c;
 653         if (!(rcr & 0x80))
 654                 set_bit(RTL8150_HW_CRC, &dev->flags);
 655         set_registers(dev, RCR, 1, &rcr);
 656         set_registers(dev, TCR, 1, &tcr);
 657         set_registers(dev, CR, 1, &cr);
 658         get_registers(dev, MSR, 1, &msr);
 659
 660         return 0;
 661 }
 662
 663 static void disable_net_traffic(rtl8150_t * dev)
 664 {
 665         u8 cr;
 666
 667         get_registers(dev, CR, 1, &cr);
 668         cr &= 0xf3;
 669         set_registers(dev, CR, 1, &cr);
 670 }
 671
 672 static void rtl8150_tx_timeout(struct net_device *netdev)
 673 {
 674         rtl8150_t *dev = netdev_priv(netdev);
 675         dev_warn(&netdev->dev, "Tx timeout.\n");
 676         usb_unlink_urb(dev->tx_urb);
 677         netdev->stats.tx_errors++;
 678 }
 679
 680 static void rtl8150_set_multicast(struct net_device *netdev)
 681 {
 682         rtl8150_t *dev = netdev_priv(netdev);
 683         u16 rx_creg = 0x9e;
 684
 685         netif_stop_queue(netdev);
 686         if (netdev->flags & IFF_PROMISC) {
 687                 rx_creg |= 0x0001;
 688                 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
 689         } else if (!netdev_mc_empty(netdev) ||
 690                    (netdev->flags & IFF_ALLMULTI)) {
 691                 rx_creg &= 0xfffe;
 692                 rx_creg |= 0x0002;
 693                 dev_dbg(&netdev->dev, "%s: allmulti set\n", netdev->name);
 694         } else {
 695                 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
 696                 rx_creg &= 0x00fc;
 697         }
 698         async_set_registers(dev, RCR, sizeof(rx_creg), rx_creg);
 699         netif_wake_queue(netdev);
 700 }
 701
 702 static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb,
 703                                             struct net_device *netdev)
 704 {
 705         rtl8150_t *dev = netdev_priv(netdev);
 706         int count, res;
 707
 708         netif_stop_queue(netdev);
 709         count = (skb->len < 60) ? 60 : skb->len;
 710         count = (count & 0x3f) ? count : count + 1;
 711         dev->tx_skb = skb;
 712         usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
 713                       skb->data, count, write_bulk_callback, dev);
 714         if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
 715                 /* Can we get/handle EPIPE here? */
 716                 if (res == -ENODEV)
 717                         netif_device_detach(dev->netdev);
 718                 else {
 719                         dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
 720                         netdev->stats.tx_errors++;
 721                         netif_start_queue(netdev);
 722                 }
 723         } else {
 724                 netdev->stats.tx_packets++;
 725                 netdev->stats.tx_bytes += skb->len;
 726                 netif_trans_update(netdev);
 727         }
 728
 729         return NETDEV_TX_OK;
 730 }
 731
 732
 733 static void set_carrier(struct net_device *netdev)
 734 {
 735         rtl8150_t *dev = netdev_priv(netdev);
 736         short tmp;
 737
 738         get_registers(dev, CSCR, 2, &tmp);
 739         if (tmp & CSCR_LINK_STATUS)
 740                 netif_carrier_on(netdev);
 741         else
 742                 netif_carrier_off(netdev);
 743 }
 744
 745 static int rtl8150_open(struct net_device *netdev)
 746 {
 747         rtl8150_t *dev = netdev_priv(netdev);
 748         int res;
 749
 750         if (dev->rx_skb == NULL)
 751                 dev->rx_skb = pull_skb(dev);
 752         if (!dev->rx_skb)
 753                 return -ENOMEM;
 754
 755         set_registers(dev, IDR, 6, netdev->dev_addr);
 756
 757         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 758                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 759         if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
 760                 if (res == -ENODEV)
 761                         netif_device_detach(dev->netdev);
 762                 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
 763                 return res;
 764         }
 765         usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
 766                      dev->intr_buff, INTBUFSIZE, intr_callback,
 767                      dev, dev->intr_interval);
 768         if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
 769                 if (res == -ENODEV)
 770                         netif_device_detach(dev->netdev);
 771                 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
 772                 usb_kill_urb(dev->rx_urb);
 773                 return res;
 774         }
 775         enable_net_traffic(dev);
 776         set_carrier(netdev);
 777         netif_start_queue(netdev);
 778
 779         return res;
 780 }
 781
 782 static int rtl8150_close(struct net_device *netdev)
 783 {
 784         rtl8150_t *dev = netdev_priv(netdev);
 785
 786         netif_stop_queue(netdev);
 787         if (!test_bit(RTL8150_UNPLUG, &dev->flags))
 788                 disable_net_traffic(dev);
 789         unlink_all_urbs(dev);
 790
 791         return 0;
 792 }
 793
 794 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
 795 {
 796         rtl8150_t *dev = netdev_priv(netdev);
 797
 798         strlcpy(info->driver, driver_name, sizeof(info->driver));
 799         strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
 800         usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info));
 801 }
 802
 803 static int rtl8150_get_link_ksettings(struct net_device *netdev,
 804                                       struct ethtool_link_ksettings *ecmd)
 805 {
 806         rtl8150_t *dev = netdev_priv(netdev);
 807         short lpa, bmcr;
 808         u32 supported;
 809
 810         supported = (SUPPORTED_10baseT_Half |
 811                           SUPPORTED_10baseT_Full |
 812                           SUPPORTED_100baseT_Half |
 813                           SUPPORTED_100baseT_Full |
 814                           SUPPORTED_Autoneg |
 815                           SUPPORTED_TP | SUPPORTED_MII);
 816         ecmd->base.port = PORT_TP;
 817         ecmd->base.phy_address = dev->phy;
 818         get_registers(dev, BMCR, 2, &bmcr);
 819         get_registers(dev, ANLP, 2, &lpa);
 820         if (bmcr & BMCR_ANENABLE) {
 821                 u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ?
 822                              SPEED_100 : SPEED_10);
 823                 ecmd->base.speed = speed;
 824                 ecmd->base.autoneg = AUTONEG_ENABLE;
 825                 if (speed == SPEED_100)
 826                         ecmd->base.duplex = (lpa & LPA_100FULL) ?
 827                             DUPLEX_FULL : DUPLEX_HALF;
 828                 else
 829                         ecmd->base.duplex = (lpa & LPA_10FULL) ?
 830                             DUPLEX_FULL : DUPLEX_HALF;
 831         } else {
 832                 ecmd->base.autoneg = AUTONEG_DISABLE;
 833                 ecmd->base.speed = ((bmcr & BMCR_SPEED100) ?
 834                                              SPEED_100 : SPEED_10);
 835                 ecmd->base.duplex = (bmcr & BMCR_FULLDPLX) ?
 836                     DUPLEX_FULL : DUPLEX_HALF;
 837         }
 838
 839         ethtool_convert_legacy_u32_to_link_mode(ecmd->link_modes.supported,
 840                                                 supported);
 841
 842         return 0;
 843 }
 844
 845 static const struct ethtool_ops ops = {
 846         .get_drvinfo = rtl8150_get_drvinfo,
 847         .get_link = ethtool_op_get_link,
 848         .get_link_ksettings = rtl8150_get_link_ksettings,
 849 };
 850
 851 static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 852 {
 853         rtl8150_t *dev = netdev_priv(netdev);
 854         u16 *data = (u16 *) & rq->ifr_ifru;
 855         int res = 0;
 856
 857         switch (cmd) {
 858         case SIOCDEVPRIVATE:
 859                 data[0] = dev->phy;
 860         case SIOCDEVPRIVATE + 1:
 861                 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
 862                 break;
 863         case SIOCDEVPRIVATE + 2:
 864                 if (!capable(CAP_NET_ADMIN))
 865                         return -EPERM;
 866                 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
 867                 break;
 868         default:
 869                 res = -EOPNOTSUPP;
 870         }
 871
 872         return res;
 873 }
 874
 875 static const struct net_device_ops rtl8150_netdev_ops = {
 876         .ndo_open               = rtl8150_open,
 877         .ndo_stop               = rtl8150_close,
 878         .ndo_do_ioctl           = rtl8150_ioctl,
 879         .ndo_start_xmit         = rtl8150_start_xmit,
 880         .ndo_tx_timeout         = rtl8150_tx_timeout,
 881         .ndo_set_rx_mode        = rtl8150_set_multicast,
 882         .ndo_set_mac_address    = rtl8150_set_mac_address,
 883
 884         .ndo_validate_addr      = eth_validate_addr,
 885 };
 886
 887 static int rtl8150_probe(struct usb_interface *intf,
 888                          const struct usb_device_id *id)
 889 {
 890         struct usb_device *udev = interface_to_usbdev(intf);
 891         rtl8150_t *dev;
 892         struct net_device *netdev;
 893
 894         netdev = alloc_etherdev(sizeof(rtl8150_t));
 895         if (!netdev)
 896                 return -ENOMEM;
 897
 898         dev = netdev_priv(netdev);
 899
 900         dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
 901         if (!dev->intr_buff) {
 902                 free_netdev(netdev);
 903                 return -ENOMEM;
 904         }
 905
 906         tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
 907         spin_lock_init(&dev->rx_pool_lock);
 908
 909         dev->udev = udev;
 910         dev->netdev = netdev;
 911         netdev->netdev_ops = &rtl8150_netdev_ops;
 912         netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
 913         netdev->ethtool_ops = &ops;
 914         dev->intr_interval = 100;       /* 100ms */
 915
 916         if (!alloc_all_urbs(dev)) {
 917                 dev_err(&intf->dev, "out of memory\n");
 918                 goto out;
 919         }
 920         if (!rtl8150_reset(dev)) {
 921                 dev_err(&intf->dev, "couldn't reset the device\n");
 922                 goto out1;
 923         }
 924         fill_skb_pool(dev);
 925         set_ethernet_addr(dev);
 926
 927         usb_set_intfdata(intf, dev);
 928         SET_NETDEV_DEV(netdev, &intf->dev);
 929         if (register_netdev(netdev) != 0) {
 930                 dev_err(&intf->dev, "couldn't register the device\n");
 931                 goto out2;
 932         }
 933
 934         dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
 935
 936         return 0;
 937
 938 out2:
 939         usb_set_intfdata(intf, NULL);
 940         free_skb_pool(dev);
 941 out1:
 942         free_all_urbs(dev);
 943 out:
 944         kfree(dev->intr_buff);
 945         free_netdev(netdev);
 946         return -EIO;
 947 }
 948
 949 static void rtl8150_disconnect(struct usb_interface *intf)
 950 {
 951         rtl8150_t *dev = usb_get_intfdata(intf);
 952
 953         usb_set_intfdata(intf, NULL);
 954         if (dev) {
 955                 set_bit(RTL8150_UNPLUG, &dev->flags);
 956                 tasklet_kill(&dev->tl);
 957                 unregister_netdev(dev->netdev);
 958                 unlink_all_urbs(dev);
 959                 free_all_urbs(dev);
 960                 free_skb_pool(dev);
 961                 if (dev->rx_skb)
 962                         dev_kfree_skb(dev->rx_skb);
 963                 kfree(dev->intr_buff);
 964                 free_netdev(dev->netdev);
 965         }
 966 }
 967
 968 static struct usb_driver rtl8150_driver = {
 969         .name           = driver_name,
 970         .probe          = rtl8150_probe,
 971         .disconnect     = rtl8150_disconnect,
 972         .id_table       = rtl8150_table,
 973         .suspend        = rtl8150_suspend,
 974         .resume         = rtl8150_resume,
 975         .disable_hub_initiated_lpm = 1,
 976 };
 977
 978 module_usb_driver(rtl8150_driver);
 979
 980 MODULE_AUTHOR(DRIVER_AUTHOR);
 981 MODULE_DESCRIPTION(DRIVER_DESC);
 982 MODULE_LICENSE("GPL");