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                 err("control request submission failed: %d", ret);
 207         } else
 208                 set_bit(RX_REG_SET, &dev->flags);
 209
 210         return ret;
 211 }
 212
 213 static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
 214 {
 215         int i;
 216         u8 data[3], tmp;
 217
 218         data[0] = phy;
 219         data[1] = data[2] = 0;
 220         tmp = indx | PHY_READ | PHY_GO;
 221         i = 0;
 222
 223         set_registers(dev, PHYADD, sizeof(data), data);
 224         set_registers(dev, PHYCNT, 1, &tmp);
 225         do {
 226                 get_registers(dev, PHYCNT, 1, data);
 227         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 228
 229         if (i <= MII_TIMEOUT) {
 230                 get_registers(dev, PHYDAT, 2, data);
 231                 *reg = data[0] | (data[1] << 8);
 232                 return 0;
 233         } else
 234                 return 1;
 235 }
 236
 237 static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
 238 {
 239         int i;
 240         u8 data[3], tmp;
 241
 242         data[0] = phy;
 243         data[1] = reg & 0xff;
 244         data[2] = (reg >> 8) & 0xff;
 245         tmp = indx | PHY_WRITE | PHY_GO;
 246         i = 0;
 247
 248         set_registers(dev, PHYADD, sizeof(data), data);
 249         set_registers(dev, PHYCNT, 1, &tmp);
 250         do {
 251                 get_registers(dev, PHYCNT, 1, data);
 252         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 253
 254         if (i <= MII_TIMEOUT)
 255                 return 0;
 256         else
 257                 return 1;
 258 }
 259
 260 static inline void set_ethernet_addr(rtl8150_t * dev)
 261 {
 262         u8 node_id[6];
 263
 264         get_registers(dev, IDR, sizeof(node_id), node_id);
 265         memcpy(dev->netdev->dev_addr, node_id, sizeof(node_id));
 266 }
 267
 268 static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
 269 {
 270         struct sockaddr *addr = p;
 271         rtl8150_t *dev = netdev_priv(netdev);
 272
 273         if (netif_running(netdev))
 274                 return -EBUSY;
 275
 276         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 277         dbg("%s: Setting MAC address to %pM\n", netdev->name, netdev->dev_addr);
 278         /* Set the IDR registers. */
 279         set_registers(dev, IDR, netdev->addr_len, netdev->dev_addr);
 280 #ifdef EEPROM_WRITE
 281         {
 282         int i;
 283         u8 cr;
 284         /* Get the CR contents. */
 285         get_registers(dev, CR, 1, &cr);
 286         /* Set the WEPROM bit (eeprom write enable). */
 287         cr |= 0x20;
 288         set_registers(dev, CR, 1, &cr);
 289         /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
 290            so we need to split them up. */
 291         for (i = 0; i * 2 < netdev->addr_len; i++) {
 292                 set_registers(dev, IDR_EEPROM + (i * 2), 2,
 293                 netdev->dev_addr + (i * 2));
 294         }
 295         /* Clear the WEPROM bit (preventing accidental eeprom writes). */
 296         cr &= 0xdf;
 297         set_registers(dev, CR, 1, &cr);
 298         }
 299 #endif
 300         return 0;
 301 }
 302
 303 static int rtl8150_reset(rtl8150_t * dev)
 304 {
 305         u8 data = 0x10;
 306         int i = HZ;
 307
 308         set_registers(dev, CR, 1, &data);
 309         do {
 310                 get_registers(dev, CR, 1, &data);
 311         } while ((data & 0x10) && --i);
 312
 313         return (i > 0) ? 1 : 0;
 314 }
 315
 316 static int alloc_all_urbs(rtl8150_t * dev)
 317 {
 318         dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 319         if (!dev->rx_urb)
 320                 return 0;
 321         dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 322         if (!dev->tx_urb) {
 323                 usb_free_urb(dev->rx_urb);
 324                 return 0;
 325         }
 326         dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
 327         if (!dev->intr_urb) {
 328                 usb_free_urb(dev->rx_urb);
 329                 usb_free_urb(dev->tx_urb);
 330                 return 0;
 331         }
 332         dev->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
 333         if (!dev->ctrl_urb) {
 334                 usb_free_urb(dev->rx_urb);
 335                 usb_free_urb(dev->tx_urb);
 336                 usb_free_urb(dev->intr_urb);
 337                 return 0;
 338         }
 339
 340         return 1;
 341 }
 342
 343 static void free_all_urbs(rtl8150_t * dev)
 344 {
 345         usb_free_urb(dev->rx_urb);
 346         usb_free_urb(dev->tx_urb);
 347         usb_free_urb(dev->intr_urb);
 348         usb_free_urb(dev->ctrl_urb);
 349 }
 350
 351 static void unlink_all_urbs(rtl8150_t * dev)
 352 {
 353         usb_kill_urb(dev->rx_urb);
 354         usb_kill_urb(dev->tx_urb);
 355         usb_kill_urb(dev->intr_urb);
 356         usb_kill_urb(dev->ctrl_urb);
 357 }
 358
 359 static inline struct sk_buff *pull_skb(rtl8150_t *dev)
 360 {
 361         struct sk_buff *skb;
 362         int i;
 363
 364         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 365                 if (dev->rx_skb_pool[i]) {
 366                         skb = dev->rx_skb_pool[i];
 367                         dev->rx_skb_pool[i] = NULL;
 368                         return skb;
 369                 }
 370         }
 371         return NULL;
 372 }
 373
 374 static void read_bulk_callback(struct urb *urb)
 375 {
 376         rtl8150_t *dev;
 377         unsigned pkt_len, res;
 378         struct sk_buff *skb;
 379         struct net_device *netdev;
 380         u16 rx_stat;
 381         int status = urb->status;
 382         int result;
 383
 384         dev = urb->context;
 385         if (!dev)
 386                 return;
 387         if (test_bit(RTL8150_UNPLUG, &dev->flags))
 388                 return;
 389         netdev = dev->netdev;
 390         if (!netif_device_present(netdev))
 391                 return;
 392
 393         switch (status) {
 394         case 0:
 395                 break;
 396         case -ENOENT:
 397                 return; /* the urb is in unlink state */
 398         case -ETIME:
 399                 if (printk_ratelimit())
 400                         dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
 401                 goto goon;
 402         default:
 403                 if (printk_ratelimit())
 404                         dev_warn(&urb->dev->dev, "Rx status %d\n", status);
 405                 goto goon;
 406         }
 407
 408         if (!dev->rx_skb)
 409                 goto resched;
 410         /* protect against short packets (tell me why we got some?!?) */
 411         if (urb->actual_length < 4)
 412                 goto goon;
 413
 414         res = urb->actual_length;
 415         rx_stat = le16_to_cpu(*(__le16 *)(urb->transfer_buffer + res - 4));
 416         pkt_len = res - 4;
 417
 418         skb_put(dev->rx_skb, pkt_len);
 419         dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
 420         netif_rx(dev->rx_skb);
 421         netdev->stats.rx_packets++;
 422         netdev->stats.rx_bytes += pkt_len;
 423
 424         spin_lock(&dev->rx_pool_lock);
 425         skb = pull_skb(dev);
 426         spin_unlock(&dev->rx_pool_lock);
 427         if (!skb)
 428                 goto resched;
 429
 430         dev->rx_skb = skb;
 431 goon:
 432         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 433                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 434         result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
 435         if (result == -ENODEV)
 436                 netif_device_detach(dev->netdev);
 437         else if (result) {
 438                 set_bit(RX_URB_FAIL, &dev->flags);
 439                 goto resched;
 440         } else {
 441                 clear_bit(RX_URB_FAIL, &dev->flags);
 442         }
 443
 444         return;
 445 resched:
 446         tasklet_schedule(&dev->tl);
 447 }
 448
 449 static void write_bulk_callback(struct urb *urb)
 450 {
 451         rtl8150_t *dev;
 452         int status = urb->status;
 453
 454         dev = urb->context;
 455         if (!dev)
 456                 return;
 457         dev_kfree_skb_irq(dev->tx_skb);
 458         if (!netif_device_present(dev->netdev))
 459                 return;
 460         if (status)
 461                 dev_info(&urb->dev->dev, "%s: Tx status %d\n",
 462                          dev->netdev->name, status);
 463         dev->netdev->trans_start = jiffies;
 464         netif_wake_queue(dev->netdev);
 465 }
 466
 467 static void intr_callback(struct urb *urb)
 468 {
 469         rtl8150_t *dev;
 470         __u8 *d;
 471         int status = urb->status;
 472         int res;
 473
 474         dev = urb->context;
 475         if (!dev)
 476                 return;
 477         switch (status) {
 478         case 0:                 /* success */
 479                 break;
 480         case -ECONNRESET:       /* unlink */
 481         case -ENOENT:
 482         case -ESHUTDOWN:
 483                 return;
 484         /* -EPIPE:  should clear the halt */
 485         default:
 486                 dev_info(&urb->dev->dev, "%s: intr status %d\n",
 487                          dev->netdev->name, status);
 488                 goto resubmit;
 489         }
 490
 491         d = urb->transfer_buffer;
 492         if (d[0] & TSR_ERRORS) {
 493                 dev->netdev->stats.tx_errors++;
 494                 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
 495                         dev->netdev->stats.tx_aborted_errors++;
 496                 if (d[INT_TSR] & TSR_LCOL)
 497                         dev->netdev->stats.tx_window_errors++;
 498                 if (d[INT_TSR] & TSR_LOSS_CRS)
 499                         dev->netdev->stats.tx_carrier_errors++;
 500         }
 501         /* Report link status changes to the network stack */
 502         if ((d[INT_MSR] & MSR_LINK) == 0) {
 503                 if (netif_carrier_ok(dev->netdev)) {
 504                         netif_carrier_off(dev->netdev);
 505                         dbg("%s: LINK LOST\n", __func__);
 506                 }
 507         } else {
 508                 if (!netif_carrier_ok(dev->netdev)) {
 509                         netif_carrier_on(dev->netdev);
 510                         dbg("%s: LINK CAME BACK\n", __func__);
 511                 }
 512         }
 513
 514 resubmit:
 515         res = usb_submit_urb (urb, GFP_ATOMIC);
 516         if (res == -ENODEV)
 517                 netif_device_detach(dev->netdev);
 518         else if (res)
 519                 err ("can't resubmit intr, %s-%s/input0, status %d",
 520                                 dev->udev->bus->bus_name,
 521                                 dev->udev->devpath, res);
 522 }
 523
 524 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
 525 {
 526         rtl8150_t *dev = usb_get_intfdata(intf);
 527
 528         netif_device_detach(dev->netdev);
 529
 530         if (netif_running(dev->netdev)) {
 531                 usb_kill_urb(dev->rx_urb);
 532                 usb_kill_urb(dev->intr_urb);
 533         }
 534         return 0;
 535 }
 536
 537 static int rtl8150_resume(struct usb_interface *intf)
 538 {
 539         rtl8150_t *dev = usb_get_intfdata(intf);
 540
 541         netif_device_attach(dev->netdev);
 542         if (netif_running(dev->netdev)) {
 543                 dev->rx_urb->status = 0;
 544                 dev->rx_urb->actual_length = 0;
 545                 read_bulk_callback(dev->rx_urb);
 546
 547                 dev->intr_urb->status = 0;
 548                 dev->intr_urb->actual_length = 0;
 549                 intr_callback(dev->intr_urb);
 550         }
 551         return 0;
 552 }
 553
 554 /*
 555 **
 556 **      network related part of the code
 557 **
 558 */
 559
 560 static void fill_skb_pool(rtl8150_t *dev)
 561 {
 562         struct sk_buff *skb;
 563         int i;
 564
 565         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 566                 if (dev->rx_skb_pool[i])
 567                         continue;
 568                 skb = dev_alloc_skb(RTL8150_MTU + 2);
 569                 if (!skb) {
 570                         return;
 571                 }
 572                 skb_reserve(skb, 2);
 573                 dev->rx_skb_pool[i] = skb;
 574         }
 575 }
 576
 577 static void free_skb_pool(rtl8150_t *dev)
 578 {
 579         int i;
 580
 581         for (i = 0; i < RX_SKB_POOL_SIZE; i++)
 582                 if (dev->rx_skb_pool[i])
 583                         dev_kfree_skb(dev->rx_skb_pool[i]);
 584 }
 585
 586 static void rx_fixup(unsigned long data)
 587 {
 588         struct rtl8150 *dev = (struct rtl8150 *)data;
 589         struct sk_buff *skb;
 590         int status;
 591
 592         spin_lock_irq(&dev->rx_pool_lock);
 593         fill_skb_pool(dev);
 594         spin_unlock_irq(&dev->rx_pool_lock);
 595         if (test_bit(RX_URB_FAIL, &dev->flags))
 596                 if (dev->rx_skb)
 597                         goto try_again;
 598         spin_lock_irq(&dev->rx_pool_lock);
 599         skb = pull_skb(dev);
 600         spin_unlock_irq(&dev->rx_pool_lock);
 601         if (skb == NULL)
 602                 goto tlsched;
 603         dev->rx_skb = skb;
 604         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 605                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 606 try_again:
 607         status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
 608         if (status == -ENODEV) {
 609                 netif_device_detach(dev->netdev);
 610         } else if (status) {
 611                 set_bit(RX_URB_FAIL, &dev->flags);
 612                 goto tlsched;
 613         } else {
 614                 clear_bit(RX_URB_FAIL, &dev->flags);
 615         }
 616
 617         return;
 618 tlsched:
 619         tasklet_schedule(&dev->tl);
 620 }
 621
 622 static int enable_net_traffic(rtl8150_t * dev)
 623 {
 624         u8 cr, tcr, rcr, msr;
 625
 626         if (!rtl8150_reset(dev)) {
 627                 dev_warn(&dev->udev->dev, "device reset failed\n");
 628         }
 629         /* RCR bit7=1 attach Rx info at the end;  =0 HW CRC (which is broken) */
 630         rcr = 0x9e;
 631         dev->rx_creg = cpu_to_le16(rcr);
 632         tcr = 0xd8;
 633         cr = 0x0c;
 634         if (!(rcr & 0x80))
 635                 set_bit(RTL8150_HW_CRC, &dev->flags);
 636         set_registers(dev, RCR, 1, &rcr);
 637         set_registers(dev, TCR, 1, &tcr);
 638         set_registers(dev, CR, 1, &cr);
 639         get_registers(dev, MSR, 1, &msr);
 640
 641         return 0;
 642 }
 643
 644 static void disable_net_traffic(rtl8150_t * dev)
 645 {
 646         u8 cr;
 647
 648         get_registers(dev, CR, 1, &cr);
 649         cr &= 0xf3;
 650         set_registers(dev, CR, 1, &cr);
 651 }
 652
 653 static void rtl8150_tx_timeout(struct net_device *netdev)
 654 {
 655         rtl8150_t *dev = netdev_priv(netdev);
 656         dev_warn(&netdev->dev, "Tx timeout.\n");
 657         usb_unlink_urb(dev->tx_urb);
 658         netdev->stats.tx_errors++;
 659 }
 660
 661 static void rtl8150_set_multicast(struct net_device *netdev)
 662 {
 663         rtl8150_t *dev = netdev_priv(netdev);
 664         netif_stop_queue(netdev);
 665         if (netdev->flags & IFF_PROMISC) {
 666                 dev->rx_creg |= cpu_to_le16(0x0001);
 667                 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
 668         } else if (!netdev_mc_empty(netdev) ||
 669                    (netdev->flags & IFF_ALLMULTI)) {
 670                 dev->rx_creg &= cpu_to_le16(0xfffe);
 671                 dev->rx_creg |= cpu_to_le16(0x0002);
 672                 dev_info(&netdev->dev, "%s: allmulti set\n", netdev->name);
 673         } else {
 674                 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
 675                 dev->rx_creg &= cpu_to_le16(0x00fc);
 676         }
 677         async_set_registers(dev, RCR, 2);
 678         netif_wake_queue(netdev);
 679 }
 680
 681 static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb,
 682                                             struct net_device *netdev)
 683 {
 684         rtl8150_t *dev = netdev_priv(netdev);
 685         int count, res;
 686
 687         netif_stop_queue(netdev);
 688         count = (skb->len < 60) ? 60 : skb->len;
 689         count = (count & 0x3f) ? count : count + 1;
 690         dev->tx_skb = skb;
 691         usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
 692                       skb->data, count, write_bulk_callback, dev);
 693         if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
 694                 /* Can we get/handle EPIPE here? */
 695                 if (res == -ENODEV)
 696                         netif_device_detach(dev->netdev);
 697                 else {
 698                         dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
 699                         netdev->stats.tx_errors++;
 700                         netif_start_queue(netdev);
 701                 }
 702         } else {
 703                 netdev->stats.tx_packets++;
 704                 netdev->stats.tx_bytes += skb->len;
 705                 netdev->trans_start = jiffies;
 706         }
 707
 708         return NETDEV_TX_OK;
 709 }
 710
 711
 712 static void set_carrier(struct net_device *netdev)
 713 {
 714         rtl8150_t *dev = netdev_priv(netdev);
 715         short tmp;
 716
 717         get_registers(dev, CSCR, 2, &tmp);
 718         if (tmp & CSCR_LINK_STATUS)
 719                 netif_carrier_on(netdev);
 720         else
 721                 netif_carrier_off(netdev);
 722 }
 723
 724 static int rtl8150_open(struct net_device *netdev)
 725 {
 726         rtl8150_t *dev = netdev_priv(netdev);
 727         int res;
 728
 729         if (dev->rx_skb == NULL)
 730                 dev->rx_skb = pull_skb(dev);
 731         if (!dev->rx_skb)
 732                 return -ENOMEM;
 733
 734         set_registers(dev, IDR, 6, netdev->dev_addr);
 735
 736         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 737                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 738         if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
 739                 if (res == -ENODEV)
 740                         netif_device_detach(dev->netdev);
 741                 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
 742                 return res;
 743         }
 744         usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
 745                      dev->intr_buff, INTBUFSIZE, intr_callback,
 746                      dev, dev->intr_interval);
 747         if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
 748                 if (res == -ENODEV)
 749                         netif_device_detach(dev->netdev);
 750                 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
 751                 usb_kill_urb(dev->rx_urb);
 752                 return res;
 753         }
 754         enable_net_traffic(dev);
 755         set_carrier(netdev);
 756         netif_start_queue(netdev);
 757
 758         return res;
 759 }
 760
 761 static int rtl8150_close(struct net_device *netdev)
 762 {
 763         rtl8150_t *dev = netdev_priv(netdev);
 764         int res = 0;
 765
 766         netif_stop_queue(netdev);
 767         if (!test_bit(RTL8150_UNPLUG, &dev->flags))
 768                 disable_net_traffic(dev);
 769         unlink_all_urbs(dev);
 770
 771         return res;
 772 }
 773
 774 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
 775 {
 776         rtl8150_t *dev = netdev_priv(netdev);
 777
 778         strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
 779         strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
 780         usb_make_path(dev->udev, info->bus_info, sizeof info->bus_info);
 781 }
 782
 783 static int rtl8150_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
 784 {
 785         rtl8150_t *dev = netdev_priv(netdev);
 786         short lpa, bmcr;
 787
 788         ecmd->supported = (SUPPORTED_10baseT_Half |
 789                           SUPPORTED_10baseT_Full |
 790                           SUPPORTED_100baseT_Half |
 791                           SUPPORTED_100baseT_Full |
 792                           SUPPORTED_Autoneg |
 793                           SUPPORTED_TP | SUPPORTED_MII);
 794         ecmd->port = PORT_TP;
 795         ecmd->transceiver = XCVR_INTERNAL;
 796         ecmd->phy_address = dev->phy;
 797         get_registers(dev, BMCR, 2, &bmcr);
 798         get_registers(dev, ANLP, 2, &lpa);
 799         if (bmcr & BMCR_ANENABLE) {
 800                 u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ?
 801                              SPEED_100 : SPEED_10);
 802                 ethtool_cmd_speed_set(ecmd, speed);
 803                 ecmd->autoneg = AUTONEG_ENABLE;
 804                 if (speed == SPEED_100)
 805                         ecmd->duplex = (lpa & LPA_100FULL) ?
 806                             DUPLEX_FULL : DUPLEX_HALF;
 807                 else
 808                         ecmd->duplex = (lpa & LPA_10FULL) ?
 809                             DUPLEX_FULL : DUPLEX_HALF;
 810         } else {
 811                 ecmd->autoneg = AUTONEG_DISABLE;
 812                 ethtool_cmd_speed_set(ecmd, ((bmcr & BMCR_SPEED100) ?
 813                                              SPEED_100 : SPEED_10));
 814                 ecmd->duplex = (bmcr & BMCR_FULLDPLX) ?
 815                     DUPLEX_FULL : DUPLEX_HALF;
 816         }
 817         return 0;
 818 }
 819
 820 static const struct ethtool_ops ops = {
 821         .get_drvinfo = rtl8150_get_drvinfo,
 822         .get_settings = rtl8150_get_settings,
 823         .get_link = ethtool_op_get_link
 824 };
 825
 826 static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 827 {
 828         rtl8150_t *dev = netdev_priv(netdev);
 829         u16 *data = (u16 *) & rq->ifr_ifru;
 830         int res = 0;
 831
 832         switch (cmd) {
 833         case SIOCDEVPRIVATE:
 834                 data[0] = dev->phy;
 835         case SIOCDEVPRIVATE + 1:
 836                 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
 837                 break;
 838         case SIOCDEVPRIVATE + 2:
 839                 if (!capable(CAP_NET_ADMIN))
 840                         return -EPERM;
 841                 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
 842                 break;
 843         default:
 844                 res = -EOPNOTSUPP;
 845         }
 846
 847         return res;
 848 }
 849
 850 static const struct net_device_ops rtl8150_netdev_ops = {
 851         .ndo_open               = rtl8150_open,
 852         .ndo_stop               = rtl8150_close,
 853         .ndo_do_ioctl           = rtl8150_ioctl,
 854         .ndo_start_xmit         = rtl8150_start_xmit,
 855         .ndo_tx_timeout         = rtl8150_tx_timeout,
 856         .ndo_set_rx_mode        = rtl8150_set_multicast,
 857         .ndo_set_mac_address    = rtl8150_set_mac_address,
 858
 859         .ndo_change_mtu         = eth_change_mtu,
 860         .ndo_validate_addr      = eth_validate_addr,
 861 };
 862
 863 static int rtl8150_probe(struct usb_interface *intf,
 864                          const struct usb_device_id *id)
 865 {
 866         struct usb_device *udev = interface_to_usbdev(intf);
 867         rtl8150_t *dev;
 868         struct net_device *netdev;
 869
 870         netdev = alloc_etherdev(sizeof(rtl8150_t));
 871         if (!netdev)
 872                 return -ENOMEM;
 873
 874         dev = netdev_priv(netdev);
 875
 876         dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
 877         if (!dev->intr_buff) {
 878                 free_netdev(netdev);
 879                 return -ENOMEM;
 880         }
 881
 882         tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
 883         spin_lock_init(&dev->rx_pool_lock);
 884
 885         dev->udev = udev;
 886         dev->netdev = netdev;
 887         netdev->netdev_ops = &rtl8150_netdev_ops;
 888         netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
 889         SET_ETHTOOL_OPS(netdev, &ops);
 890         dev->intr_interval = 100;       /* 100ms */
 891
 892         if (!alloc_all_urbs(dev)) {
 893                 err("out of memory");
 894                 goto out;
 895         }
 896         if (!rtl8150_reset(dev)) {
 897                 err("couldn't reset the device");
 898                 goto out1;
 899         }
 900         fill_skb_pool(dev);
 901         set_ethernet_addr(dev);
 902
 903         usb_set_intfdata(intf, dev);
 904         SET_NETDEV_DEV(netdev, &intf->dev);
 905         if (register_netdev(netdev) != 0) {
 906                 err("couldn't register the device");
 907                 goto out2;
 908         }
 909
 910         dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
 911
 912         return 0;
 913
 914 out2:
 915         usb_set_intfdata(intf, NULL);
 916         free_skb_pool(dev);
 917 out1:
 918         free_all_urbs(dev);
 919 out:
 920         kfree(dev->intr_buff);
 921         free_netdev(netdev);
 922         return -EIO;
 923 }
 924
 925 static void rtl8150_disconnect(struct usb_interface *intf)
 926 {
 927         rtl8150_t *dev = usb_get_intfdata(intf);
 928
 929         usb_set_intfdata(intf, NULL);
 930         if (dev) {
 931                 set_bit(RTL8150_UNPLUG, &dev->flags);
 932                 tasklet_kill(&dev->tl);
 933                 unregister_netdev(dev->netdev);
 934                 unlink_all_urbs(dev);
 935                 free_all_urbs(dev);
 936                 free_skb_pool(dev);
 937                 if (dev->rx_skb)
 938                         dev_kfree_skb(dev->rx_skb);
 939                 kfree(dev->intr_buff);
 940                 free_netdev(dev->netdev);
 941         }
 942 }
 943
 944 static struct usb_driver rtl8150_driver = {
 945         .name           = driver_name,
 946         .probe          = rtl8150_probe,
 947         .disconnect     = rtl8150_disconnect,
 948         .id_table       = rtl8150_table,
 949         .suspend        = rtl8150_suspend,
 950         .resume         = rtl8150_resume
 951 };
 952
 953 module_usb_driver(rtl8150_driver);
 954
 955 MODULE_AUTHOR(DRIVER_AUTHOR);
 956 MODULE_DESCRIPTION(DRIVER_DESC);
 957 MODULE_LICENSE("GPL");