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, *ctrl_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         __le16 rx_creg;
 140         u8 *intr_buff;
 141         u8 phy;
 142 };
 143
 144 typedef struct rtl8150 rtl8150_t;
 145
 146 static const char driver_name [] = "rtl8150";
 147
 148 /*
 149 **
 150 **      device related part of the code
 151 **
 152 */
 153 static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
 154 {
 155         return usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
 156                                RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
 157                                indx, 0, data, size, 500);
 158 }
 159
 160 static int set_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
 161 {
 162         return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
 163                                RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
 164                                indx, 0, data, size, 500);
 165 }
 166
 167 static void ctrl_callback(struct urb *urb)
 168 {
 169         rtl8150_t *dev;
 170         int status = urb->status;
 171
 172         switch (status) {
 173         case 0:
 174                 break;
 175         case -EINPROGRESS:
 176                 break;
 177         case -ENOENT:
 178                 break;
 179         default:
 180                 if (printk_ratelimit())
 181                         dev_warn(&urb->dev->dev, "ctrl urb status %d\n", status);
 182         }
 183         dev = urb->context;
 184         clear_bit(RX_REG_SET, &dev->flags);
 185 }
 186
 187 static int async_set_registers(rtl8150_t * dev, u16 indx, u16 size)
 188 {
 189         int ret;
 190
 191         if (test_bit(RX_REG_SET, &dev->flags))
 192                 return -EAGAIN;
 193
 194         dev->dr.bRequestType = RTL8150_REQT_WRITE;
 195         dev->dr.bRequest = RTL8150_REQ_SET_REGS;
 196         dev->dr.wValue = cpu_to_le16(indx);
 197         dev->dr.wIndex = 0;
 198         dev->dr.wLength = cpu_to_le16(size);
 199         dev->ctrl_urb->transfer_buffer_length = size;
 200         usb_fill_control_urb(dev->ctrl_urb, dev->udev,
 201                          usb_sndctrlpipe(dev->udev, 0), (char *) &dev->dr,
 202                          &dev->rx_creg, size, ctrl_callback, dev);
 203         if ((ret = usb_submit_urb(dev->ctrl_urb, GFP_ATOMIC))) {
 204                 if (ret == -ENODEV)
 205                         netif_device_detach(dev->netdev);
 206                 dev_err(&dev->udev->dev,
 207                         "control request submission failed: %d\n", ret);
 208         } else
 209                 set_bit(RX_REG_SET, &dev->flags);
 210
 211         return ret;
 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         dev->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
 334         if (!dev->ctrl_urb) {
 335                 usb_free_urb(dev->rx_urb);
 336                 usb_free_urb(dev->tx_urb);
 337                 usb_free_urb(dev->intr_urb);
 338                 return 0;
 339         }
 340
 341         return 1;
 342 }
 343
 344 static void free_all_urbs(rtl8150_t * dev)
 345 {
 346         usb_free_urb(dev->rx_urb);
 347         usb_free_urb(dev->tx_urb);
 348         usb_free_urb(dev->intr_urb);
 349         usb_free_urb(dev->ctrl_urb);
 350 }
 351
 352 static void unlink_all_urbs(rtl8150_t * dev)
 353 {
 354         usb_kill_urb(dev->rx_urb);
 355         usb_kill_urb(dev->tx_urb);
 356         usb_kill_urb(dev->intr_urb);
 357         usb_kill_urb(dev->ctrl_urb);
 358 }
 359
 360 static inline struct sk_buff *pull_skb(rtl8150_t *dev)
 361 {
 362         struct sk_buff *skb;
 363         int i;
 364
 365         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 366                 if (dev->rx_skb_pool[i]) {
 367                         skb = dev->rx_skb_pool[i];
 368                         dev->rx_skb_pool[i] = NULL;
 369                         return skb;
 370                 }
 371         }
 372         return NULL;
 373 }
 374
 375 static void read_bulk_callback(struct urb *urb)
 376 {
 377         rtl8150_t *dev;
 378         unsigned pkt_len, res;
 379         struct sk_buff *skb;
 380         struct net_device *netdev;
 381         u16 rx_stat;
 382         int status = urb->status;
 383         int result;
 384
 385         dev = urb->context;
 386         if (!dev)
 387                 return;
 388         if (test_bit(RTL8150_UNPLUG, &dev->flags))
 389                 return;
 390         netdev = dev->netdev;
 391         if (!netif_device_present(netdev))
 392                 return;
 393
 394         switch (status) {
 395         case 0:
 396                 break;
 397         case -ENOENT:
 398                 return; /* the urb is in unlink state */
 399         case -ETIME:
 400                 if (printk_ratelimit())
 401                         dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
 402                 goto goon;
 403         default:
 404                 if (printk_ratelimit())
 405                         dev_warn(&urb->dev->dev, "Rx status %d\n", status);
 406                 goto goon;
 407         }
 408
 409         if (!dev->rx_skb)
 410                 goto resched;
 411         /* protect against short packets (tell me why we got some?!?) */
 412         if (urb->actual_length < 4)
 413                 goto goon;
 414
 415         res = urb->actual_length;
 416         rx_stat = le16_to_cpu(*(__le16 *)(urb->transfer_buffer + res - 4));
 417         pkt_len = res - 4;
 418
 419         skb_put(dev->rx_skb, pkt_len);
 420         dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
 421         netif_rx(dev->rx_skb);
 422         netdev->stats.rx_packets++;
 423         netdev->stats.rx_bytes += pkt_len;
 424
 425         spin_lock(&dev->rx_pool_lock);
 426         skb = pull_skb(dev);
 427         spin_unlock(&dev->rx_pool_lock);
 428         if (!skb)
 429                 goto resched;
 430
 431         dev->rx_skb = skb;
 432 goon:
 433         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 434                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 435         result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
 436         if (result == -ENODEV)
 437                 netif_device_detach(dev->netdev);
 438         else if (result) {
 439                 set_bit(RX_URB_FAIL, &dev->flags);
 440                 goto resched;
 441         } else {
 442                 clear_bit(RX_URB_FAIL, &dev->flags);
 443         }
 444
 445         return;
 446 resched:
 447         tasklet_schedule(&dev->tl);
 448 }
 449
 450 static void write_bulk_callback(struct urb *urb)
 451 {
 452         rtl8150_t *dev;
 453         int status = urb->status;
 454
 455         dev = urb->context;
 456         if (!dev)
 457                 return;
 458         dev_kfree_skb_irq(dev->tx_skb);
 459         if (!netif_device_present(dev->netdev))
 460                 return;
 461         if (status)
 462                 dev_info(&urb->dev->dev, "%s: Tx status %d\n",
 463                          dev->netdev->name, status);
 464         dev->netdev->trans_start = jiffies;
 465         netif_wake_queue(dev->netdev);
 466 }
 467
 468 static void intr_callback(struct urb *urb)
 469 {
 470         rtl8150_t *dev;
 471         __u8 *d;
 472         int status = urb->status;
 473         int res;
 474
 475         dev = urb->context;
 476         if (!dev)
 477                 return;
 478         switch (status) {
 479         case 0:                 /* success */
 480                 break;
 481         case -ECONNRESET:       /* unlink */
 482         case -ENOENT:
 483         case -ESHUTDOWN:
 484                 return;
 485         /* -EPIPE:  should clear the halt */
 486         default:
 487                 dev_info(&urb->dev->dev, "%s: intr status %d\n",
 488                          dev->netdev->name, status);
 489                 goto resubmit;
 490         }
 491
 492         d = urb->transfer_buffer;
 493         if (d[0] & TSR_ERRORS) {
 494                 dev->netdev->stats.tx_errors++;
 495                 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
 496                         dev->netdev->stats.tx_aborted_errors++;
 497                 if (d[INT_TSR] & TSR_LCOL)
 498                         dev->netdev->stats.tx_window_errors++;
 499                 if (d[INT_TSR] & TSR_LOSS_CRS)
 500                         dev->netdev->stats.tx_carrier_errors++;
 501         }
 502         /* Report link status changes to the network stack */
 503         if ((d[INT_MSR] & MSR_LINK) == 0) {
 504                 if (netif_carrier_ok(dev->netdev)) {
 505                         netif_carrier_off(dev->netdev);
 506                         netdev_dbg(dev->netdev, "%s: LINK LOST\n", __func__);
 507                 }
 508         } else {
 509                 if (!netif_carrier_ok(dev->netdev)) {
 510                         netif_carrier_on(dev->netdev);
 511                         netdev_dbg(dev->netdev, "%s: LINK CAME BACK\n", __func__);
 512                 }
 513         }
 514
 515 resubmit:
 516         res = usb_submit_urb (urb, GFP_ATOMIC);
 517         if (res == -ENODEV)
 518                 netif_device_detach(dev->netdev);
 519         else if (res)
 520                 dev_err(&dev->udev->dev,
 521                         "can't resubmit intr, %s-%s/input0, status %d\n",
 522                         dev->udev->bus->bus_name, dev->udev->devpath, res);
 523 }
 524
 525 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
 526 {
 527         rtl8150_t *dev = usb_get_intfdata(intf);
 528
 529         netif_device_detach(dev->netdev);
 530
 531         if (netif_running(dev->netdev)) {
 532                 usb_kill_urb(dev->rx_urb);
 533                 usb_kill_urb(dev->intr_urb);
 534         }
 535         return 0;
 536 }
 537
 538 static int rtl8150_resume(struct usb_interface *intf)
 539 {
 540         rtl8150_t *dev = usb_get_intfdata(intf);
 541
 542         netif_device_attach(dev->netdev);
 543         if (netif_running(dev->netdev)) {
 544                 dev->rx_urb->status = 0;
 545                 dev->rx_urb->actual_length = 0;
 546                 read_bulk_callback(dev->rx_urb);
 547
 548                 dev->intr_urb->status = 0;
 549                 dev->intr_urb->actual_length = 0;
 550                 intr_callback(dev->intr_urb);
 551         }
 552         return 0;
 553 }
 554
 555 /*
 556 **
 557 **      network related part of the code
 558 **
 559 */
 560
 561 static void fill_skb_pool(rtl8150_t *dev)
 562 {
 563         struct sk_buff *skb;
 564         int i;
 565
 566         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 567                 if (dev->rx_skb_pool[i])
 568                         continue;
 569                 skb = dev_alloc_skb(RTL8150_MTU + 2);
 570                 if (!skb) {
 571                         return;
 572                 }
 573                 skb_reserve(skb, 2);
 574                 dev->rx_skb_pool[i] = skb;
 575         }
 576 }
 577
 578 static void free_skb_pool(rtl8150_t *dev)
 579 {
 580         int i;
 581
 582         for (i = 0; i < RX_SKB_POOL_SIZE; i++)
 583                 if (dev->rx_skb_pool[i])
 584                         dev_kfree_skb(dev->rx_skb_pool[i]);
 585 }
 586
 587 static void rx_fixup(unsigned long data)
 588 {
 589         struct rtl8150 *dev = (struct rtl8150 *)data;
 590         struct sk_buff *skb;
 591         int status;
 592
 593         spin_lock_irq(&dev->rx_pool_lock);
 594         fill_skb_pool(dev);
 595         spin_unlock_irq(&dev->rx_pool_lock);
 596         if (test_bit(RX_URB_FAIL, &dev->flags))
 597                 if (dev->rx_skb)
 598                         goto try_again;
 599         spin_lock_irq(&dev->rx_pool_lock);
 600         skb = pull_skb(dev);
 601         spin_unlock_irq(&dev->rx_pool_lock);
 602         if (skb == NULL)
 603                 goto tlsched;
 604         dev->rx_skb = skb;
 605         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 606                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 607 try_again:
 608         status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
 609         if (status == -ENODEV) {
 610                 netif_device_detach(dev->netdev);
 611         } else if (status) {
 612                 set_bit(RX_URB_FAIL, &dev->flags);
 613                 goto tlsched;
 614         } else {
 615                 clear_bit(RX_URB_FAIL, &dev->flags);
 616         }
 617
 618         return;
 619 tlsched:
 620         tasklet_schedule(&dev->tl);
 621 }
 622
 623 static int enable_net_traffic(rtl8150_t * dev)
 624 {
 625         u8 cr, tcr, rcr, msr;
 626
 627         if (!rtl8150_reset(dev)) {
 628                 dev_warn(&dev->udev->dev, "device reset failed\n");
 629         }
 630         /* RCR bit7=1 attach Rx info at the end;  =0 HW CRC (which is broken) */
 631         rcr = 0x9e;
 632         dev->rx_creg = cpu_to_le16(rcr);
 633         tcr = 0xd8;
 634         cr = 0x0c;
 635         if (!(rcr & 0x80))
 636                 set_bit(RTL8150_HW_CRC, &dev->flags);
 637         set_registers(dev, RCR, 1, &rcr);
 638         set_registers(dev, TCR, 1, &tcr);
 639         set_registers(dev, CR, 1, &cr);
 640         get_registers(dev, MSR, 1, &msr);
 641
 642         return 0;
 643 }
 644
 645 static void disable_net_traffic(rtl8150_t * dev)
 646 {
 647         u8 cr;
 648
 649         get_registers(dev, CR, 1, &cr);
 650         cr &= 0xf3;
 651         set_registers(dev, CR, 1, &cr);
 652 }
 653
 654 static void rtl8150_tx_timeout(struct net_device *netdev)
 655 {
 656         rtl8150_t *dev = netdev_priv(netdev);
 657         dev_warn(&netdev->dev, "Tx timeout.\n");
 658         usb_unlink_urb(dev->tx_urb);
 659         netdev->stats.tx_errors++;
 660 }
 661
 662 static void rtl8150_set_multicast(struct net_device *netdev)
 663 {
 664         rtl8150_t *dev = netdev_priv(netdev);
 665         netif_stop_queue(netdev);
 666         if (netdev->flags & IFF_PROMISC) {
 667                 dev->rx_creg |= cpu_to_le16(0x0001);
 668                 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
 669         } else if (!netdev_mc_empty(netdev) ||
 670                    (netdev->flags & IFF_ALLMULTI)) {
 671                 dev->rx_creg &= cpu_to_le16(0xfffe);
 672                 dev->rx_creg |= cpu_to_le16(0x0002);
 673                 dev_info(&netdev->dev, "%s: allmulti set\n", netdev->name);
 674         } else {
 675                 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
 676                 dev->rx_creg &= cpu_to_le16(0x00fc);
 677         }
 678         async_set_registers(dev, RCR, 2);
 679         netif_wake_queue(netdev);
 680 }
 681
 682 static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb,
 683                                             struct net_device *netdev)
 684 {
 685         rtl8150_t *dev = netdev_priv(netdev);
 686         int count, res;
 687
 688         netif_stop_queue(netdev);
 689         count = (skb->len < 60) ? 60 : skb->len;
 690         count = (count & 0x3f) ? count : count + 1;
 691         dev->tx_skb = skb;
 692         usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
 693                       skb->data, count, write_bulk_callback, dev);
 694         if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
 695                 /* Can we get/handle EPIPE here? */
 696                 if (res == -ENODEV)
 697                         netif_device_detach(dev->netdev);
 698                 else {
 699                         dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
 700                         netdev->stats.tx_errors++;
 701                         netif_start_queue(netdev);
 702                 }
 703         } else {
 704                 netdev->stats.tx_packets++;
 705                 netdev->stats.tx_bytes += skb->len;
 706                 netdev->trans_start = jiffies;
 707         }
 708
 709         return NETDEV_TX_OK;
 710 }
 711
 712
 713 static void set_carrier(struct net_device *netdev)
 714 {
 715         rtl8150_t *dev = netdev_priv(netdev);
 716         short tmp;
 717
 718         get_registers(dev, CSCR, 2, &tmp);
 719         if (tmp & CSCR_LINK_STATUS)
 720                 netif_carrier_on(netdev);
 721         else
 722                 netif_carrier_off(netdev);
 723 }
 724
 725 static int rtl8150_open(struct net_device *netdev)
 726 {
 727         rtl8150_t *dev = netdev_priv(netdev);
 728         int res;
 729
 730         if (dev->rx_skb == NULL)
 731                 dev->rx_skb = pull_skb(dev);
 732         if (!dev->rx_skb)
 733                 return -ENOMEM;
 734
 735         set_registers(dev, IDR, 6, netdev->dev_addr);
 736
 737         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 738                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 739         if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
 740                 if (res == -ENODEV)
 741                         netif_device_detach(dev->netdev);
 742                 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
 743                 return res;
 744         }
 745         usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
 746                      dev->intr_buff, INTBUFSIZE, intr_callback,
 747                      dev, dev->intr_interval);
 748         if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
 749                 if (res == -ENODEV)
 750                         netif_device_detach(dev->netdev);
 751                 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
 752                 usb_kill_urb(dev->rx_urb);
 753                 return res;
 754         }
 755         enable_net_traffic(dev);
 756         set_carrier(netdev);
 757         netif_start_queue(netdev);
 758
 759         return res;
 760 }
 761
 762 static int rtl8150_close(struct net_device *netdev)
 763 {
 764         rtl8150_t *dev = netdev_priv(netdev);
 765         int res = 0;
 766
 767         netif_stop_queue(netdev);
 768         if (!test_bit(RTL8150_UNPLUG, &dev->flags))
 769                 disable_net_traffic(dev);
 770         unlink_all_urbs(dev);
 771
 772         return res;
 773 }
 774
 775 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
 776 {
 777         rtl8150_t *dev = netdev_priv(netdev);
 778
 779         strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
 780         strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
 781         usb_make_path(dev->udev, info->bus_info, sizeof info->bus_info);
 782 }
 783
 784 static int rtl8150_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
 785 {
 786         rtl8150_t *dev = netdev_priv(netdev);
 787         short lpa, bmcr;
 788
 789         ecmd->supported = (SUPPORTED_10baseT_Half |
 790                           SUPPORTED_10baseT_Full |
 791                           SUPPORTED_100baseT_Half |
 792                           SUPPORTED_100baseT_Full |
 793                           SUPPORTED_Autoneg |
 794                           SUPPORTED_TP | SUPPORTED_MII);
 795         ecmd->port = PORT_TP;
 796         ecmd->transceiver = XCVR_INTERNAL;
 797         ecmd->phy_address = dev->phy;
 798         get_registers(dev, BMCR, 2, &bmcr);
 799         get_registers(dev, ANLP, 2, &lpa);
 800         if (bmcr & BMCR_ANENABLE) {
 801                 u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ?
 802                              SPEED_100 : SPEED_10);
 803                 ethtool_cmd_speed_set(ecmd, speed);
 804                 ecmd->autoneg = AUTONEG_ENABLE;
 805                 if (speed == SPEED_100)
 806                         ecmd->duplex = (lpa & LPA_100FULL) ?
 807                             DUPLEX_FULL : DUPLEX_HALF;
 808                 else
 809                         ecmd->duplex = (lpa & LPA_10FULL) ?
 810                             DUPLEX_FULL : DUPLEX_HALF;
 811         } else {
 812                 ecmd->autoneg = AUTONEG_DISABLE;
 813                 ethtool_cmd_speed_set(ecmd, ((bmcr & BMCR_SPEED100) ?
 814                                              SPEED_100 : SPEED_10));
 815                 ecmd->duplex = (bmcr & BMCR_FULLDPLX) ?
 816                     DUPLEX_FULL : DUPLEX_HALF;
 817         }
 818         return 0;
 819 }
 820
 821 static const struct ethtool_ops ops = {
 822         .get_drvinfo = rtl8150_get_drvinfo,
 823         .get_settings = rtl8150_get_settings,
 824         .get_link = ethtool_op_get_link
 825 };
 826
 827 static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 828 {
 829         rtl8150_t *dev = netdev_priv(netdev);
 830         u16 *data = (u16 *) & rq->ifr_ifru;
 831         int res = 0;
 832
 833         switch (cmd) {
 834         case SIOCDEVPRIVATE:
 835                 data[0] = dev->phy;
 836         case SIOCDEVPRIVATE + 1:
 837                 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
 838                 break;
 839         case SIOCDEVPRIVATE + 2:
 840                 if (!capable(CAP_NET_ADMIN))
 841                         return -EPERM;
 842                 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
 843                 break;
 844         default:
 845                 res = -EOPNOTSUPP;
 846         }
 847
 848         return res;
 849 }
 850
 851 static const struct net_device_ops rtl8150_netdev_ops = {
 852         .ndo_open               = rtl8150_open,
 853         .ndo_stop               = rtl8150_close,
 854         .ndo_do_ioctl           = rtl8150_ioctl,
 855         .ndo_start_xmit         = rtl8150_start_xmit,
 856         .ndo_tx_timeout         = rtl8150_tx_timeout,
 857         .ndo_set_rx_mode        = rtl8150_set_multicast,
 858         .ndo_set_mac_address    = rtl8150_set_mac_address,
 859
 860         .ndo_change_mtu         = eth_change_mtu,
 861         .ndo_validate_addr      = eth_validate_addr,
 862 };
 863
 864 static int rtl8150_probe(struct usb_interface *intf,
 865                          const struct usb_device_id *id)
 866 {
 867         struct usb_device *udev = interface_to_usbdev(intf);
 868         rtl8150_t *dev;
 869         struct net_device *netdev;
 870
 871         netdev = alloc_etherdev(sizeof(rtl8150_t));
 872         if (!netdev)
 873                 return -ENOMEM;
 874
 875         dev = netdev_priv(netdev);
 876
 877         dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
 878         if (!dev->intr_buff) {
 879                 free_netdev(netdev);
 880                 return -ENOMEM;
 881         }
 882
 883         tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
 884         spin_lock_init(&dev->rx_pool_lock);
 885
 886         dev->udev = udev;
 887         dev->netdev = netdev;
 888         netdev->netdev_ops = &rtl8150_netdev_ops;
 889         netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
 890         SET_ETHTOOL_OPS(netdev, &ops);
 891         dev->intr_interval = 100;       /* 100ms */
 892
 893         if (!alloc_all_urbs(dev)) {
 894                 dev_err(&intf->dev, "out of memory\n");
 895                 goto out;
 896         }
 897         if (!rtl8150_reset(dev)) {
 898                 dev_err(&intf->dev, "couldn't reset the device\n");
 899                 goto out1;
 900         }
 901         fill_skb_pool(dev);
 902         set_ethernet_addr(dev);
 903
 904         usb_set_intfdata(intf, dev);
 905         SET_NETDEV_DEV(netdev, &intf->dev);
 906         if (register_netdev(netdev) != 0) {
 907                 dev_err(&intf->dev, "couldn't register the device\n");
 908                 goto out2;
 909         }
 910
 911         dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
 912
 913         return 0;
 914
 915 out2:
 916         usb_set_intfdata(intf, NULL);
 917         free_skb_pool(dev);
 918 out1:
 919         free_all_urbs(dev);
 920 out:
 921         kfree(dev->intr_buff);
 922         free_netdev(netdev);
 923         return -EIO;
 924 }
 925
 926 static void rtl8150_disconnect(struct usb_interface *intf)
 927 {
 928         rtl8150_t *dev = usb_get_intfdata(intf);
 929
 930         usb_set_intfdata(intf, NULL);
 931         if (dev) {
 932                 set_bit(RTL8150_UNPLUG, &dev->flags);
 933                 tasklet_kill(&dev->tl);
 934                 unregister_netdev(dev->netdev);
 935                 unlink_all_urbs(dev);
 936                 free_all_urbs(dev);
 937                 free_skb_pool(dev);
 938                 if (dev->rx_skb)
 939                         dev_kfree_skb(dev->rx_skb);
 940                 kfree(dev->intr_buff);
 941                 free_netdev(dev->netdev);
 942         }
 943 }
 944
 945 static struct usb_driver rtl8150_driver = {
 946         .name           = driver_name,
 947         .probe          = rtl8150_probe,
 948         .disconnect     = rtl8150_disconnect,
 949         .id_table       = rtl8150_table,
 950         .suspend        = rtl8150_suspend,
 951         .resume         = rtl8150_resume,
 952         .disable_hub_initiated_lpm = 1,
 953 };
 954
 955 module_usb_driver(rtl8150_driver);
 956
 957 MODULE_AUTHOR(DRIVER_AUTHOR);
 958 MODULE_DESCRIPTION(DRIVER_DESC);
 959 MODULE_LICENSE("GPL");