linux/drivers/net/usb/rtl8150.c
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   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/* Transmit status register errors */
  89#define TSR_ECOL                (1<<5)
  90#define TSR_LCOL                (1<<4)
  91#define TSR_LOSS_CRS            (1<<3)
  92#define TSR_JBR                 (1<<2)
  93#define TSR_ERRORS              (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
  94/* Receive status register errors */
  95#define RSR_CRC                 (1<<2)
  96#define RSR_FAE                 (1<<1)
  97#define RSR_ERRORS              (RSR_CRC | RSR_FAE)
  98
  99/* Media status register definitions */
 100#define MSR_DUPLEX              (1<<4)
 101#define MSR_SPEED               (1<<3)
 102#define MSR_LINK                (1<<2)
 103
 104/* Interrupt pipe data */
 105#define INT_TSR                 0x00
 106#define INT_RSR                 0x01
 107#define INT_MSR                 0x02
 108#define INT_WAKSR               0x03
 109#define INT_TXOK_CNT            0x04
 110#define INT_RXLOST_CNT          0x05
 111#define INT_CRERR_CNT           0x06
 112#define INT_COL_CNT             0x07
 113
 114
 115#define RTL8150_MTU             1540
 116#define RTL8150_TX_TIMEOUT      (HZ)
 117#define RX_SKB_POOL_SIZE        4
 118
 119/* rtl8150 flags */
 120#define RTL8150_HW_CRC          0
 121#define RX_REG_SET              1
 122#define RTL8150_UNPLUG          2
 123#define RX_URB_FAIL             3
 124
 125/* Define these values to match your device */
 126#define VENDOR_ID_REALTEK               0x0bda
 127#define VENDOR_ID_MELCO                 0x0411
 128#define VENDOR_ID_MICRONET              0x3980
 129#define VENDOR_ID_LONGSHINE             0x07b8
 130#define VENDOR_ID_OQO                   0x1557
 131#define VENDOR_ID_ZYXEL                 0x0586
 132
 133#define PRODUCT_ID_RTL8150              0x8150
 134#define PRODUCT_ID_LUAKTX               0x0012
 135#define PRODUCT_ID_LCS8138TX            0x401a
 136#define PRODUCT_ID_SP128AR              0x0003
 137#define PRODUCT_ID_PRESTIGE             0x401a
 138
 139#undef  EEPROM_WRITE
 140
 141/* table of devices that work with this driver */
 142static struct usb_device_id rtl8150_table[] = {
 143        {USB_DEVICE(VENDOR_ID_REALTEK, PRODUCT_ID_RTL8150)},
 144        {USB_DEVICE(VENDOR_ID_MELCO, PRODUCT_ID_LUAKTX)},
 145        {USB_DEVICE(VENDOR_ID_MICRONET, PRODUCT_ID_SP128AR)},
 146        {USB_DEVICE(VENDOR_ID_LONGSHINE, PRODUCT_ID_LCS8138TX)},
 147        {USB_DEVICE(VENDOR_ID_OQO, PRODUCT_ID_RTL8150)},
 148        {USB_DEVICE(VENDOR_ID_ZYXEL, PRODUCT_ID_PRESTIGE)},
 149        {}
 150};
 151
 152MODULE_DEVICE_TABLE(usb, rtl8150_table);
 153
 154struct rtl8150 {
 155        unsigned long flags;
 156        struct usb_device *udev;
 157        struct tasklet_struct tl;
 158        struct net_device_stats stats;
 159        struct net_device *netdev;
 160        struct urb *rx_urb, *tx_urb, *intr_urb, *ctrl_urb;
 161        struct sk_buff *tx_skb, *rx_skb;
 162        struct sk_buff *rx_skb_pool[RX_SKB_POOL_SIZE];
 163        spinlock_t rx_pool_lock;
 164        struct usb_ctrlrequest dr;
 165        int intr_interval;
 166        __le16 rx_creg;
 167        u8 *intr_buff;
 168        u8 phy;
 169};
 170
 171typedef struct rtl8150 rtl8150_t;
 172
 173static void fill_skb_pool(rtl8150_t *);
 174static void free_skb_pool(rtl8150_t *);
 175static inline struct sk_buff *pull_skb(rtl8150_t *);
 176static void rtl8150_disconnect(struct usb_interface *intf);
 177static int rtl8150_probe(struct usb_interface *intf,
 178                           const struct usb_device_id *id);
 179static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message);
 180static int rtl8150_resume(struct usb_interface *intf);
 181
 182static const char driver_name [] = "rtl8150";
 183
 184static struct usb_driver rtl8150_driver = {
 185        .name =         driver_name,
 186        .probe =        rtl8150_probe,
 187        .disconnect =   rtl8150_disconnect,
 188        .id_table =     rtl8150_table,
 189        .suspend =      rtl8150_suspend,
 190        .resume =       rtl8150_resume
 191};
 192
 193/*
 194**
 195**      device related part of the code
 196**
 197*/
 198static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
 199{
 200        return usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
 201                               RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
 202                               indx, 0, data, size, 500);
 203}
 204
 205static int set_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
 206{
 207        return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
 208                               RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
 209                               indx, 0, data, size, 500);
 210}
 211
 212static void ctrl_callback(struct urb *urb)
 213{
 214        rtl8150_t *dev;
 215
 216        switch (urb->status) {
 217        case 0:
 218                break;
 219        case -EINPROGRESS:
 220                break;
 221        case -ENOENT:
 222                break;
 223        default:
 224                warn("ctrl urb status %d", urb->status);
 225        }
 226        dev = urb->context;
 227        clear_bit(RX_REG_SET, &dev->flags);
 228}
 229
 230static int async_set_registers(rtl8150_t * dev, u16 indx, u16 size)
 231{
 232        int ret;
 233
 234        if (test_bit(RX_REG_SET, &dev->flags))
 235                return -EAGAIN;
 236
 237        dev->dr.bRequestType = RTL8150_REQT_WRITE;
 238        dev->dr.bRequest = RTL8150_REQ_SET_REGS;
 239        dev->dr.wValue = cpu_to_le16(indx);
 240        dev->dr.wIndex = 0;
 241        dev->dr.wLength = cpu_to_le16(size);
 242        dev->ctrl_urb->transfer_buffer_length = size;
 243        usb_fill_control_urb(dev->ctrl_urb, dev->udev,
 244                         usb_sndctrlpipe(dev->udev, 0), (char *) &dev->dr,
 245                         &dev->rx_creg, size, ctrl_callback, dev);
 246        if ((ret = usb_submit_urb(dev->ctrl_urb, GFP_ATOMIC))) {
 247                if (ret == -ENODEV)
 248                        netif_device_detach(dev->netdev);
 249                err("control request submission failed: %d", ret);
 250        } else
 251                set_bit(RX_REG_SET, &dev->flags);
 252
 253        return ret;
 254}
 255
 256static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
 257{
 258        int i;
 259        u8 data[3], tmp;
 260
 261        data[0] = phy;
 262        data[1] = data[2] = 0;
 263        tmp = indx | PHY_READ | PHY_GO;
 264        i = 0;
 265
 266        set_registers(dev, PHYADD, sizeof(data), data);
 267        set_registers(dev, PHYCNT, 1, &tmp);
 268        do {
 269                get_registers(dev, PHYCNT, 1, data);
 270        } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 271
 272        if (i < MII_TIMEOUT) {
 273                get_registers(dev, PHYDAT, 2, data);
 274                *reg = data[0] | (data[1] << 8);
 275                return 0;
 276        } else
 277                return 1;
 278}
 279
 280static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
 281{
 282        int i;
 283        u8 data[3], tmp;
 284
 285        data[0] = phy;
 286        data[1] = reg & 0xff;
 287        data[2] = (reg >> 8) & 0xff;
 288        tmp = indx | PHY_WRITE | PHY_GO;
 289        i = 0;
 290
 291        set_registers(dev, PHYADD, sizeof(data), data);
 292        set_registers(dev, PHYCNT, 1, &tmp);
 293        do {
 294                get_registers(dev, PHYCNT, 1, data);
 295        } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 296
 297        if (i < MII_TIMEOUT)
 298                return 0;
 299        else
 300                return 1;
 301}
 302
 303static inline void set_ethernet_addr(rtl8150_t * dev)
 304{
 305        u8 node_id[6];
 306
 307        get_registers(dev, IDR, sizeof(node_id), node_id);
 308        memcpy(dev->netdev->dev_addr, node_id, sizeof(node_id));
 309}
 310
 311static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
 312{
 313        struct sockaddr *addr = p;
 314        rtl8150_t *dev = netdev_priv(netdev);
 315        int i;
 316
 317        if (netif_running(netdev))
 318                return -EBUSY;
 319
 320        memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 321        dbg("%s: Setting MAC address to ", netdev->name);
 322        for (i = 0; i < 5; i++)
 323                dbg("%02X:", netdev->dev_addr[i]);
 324        dbg("%02X\n", netdev->dev_addr[i]);
 325        /* Set the IDR registers. */
 326        set_registers(dev, IDR, sizeof(netdev->dev_addr), netdev->dev_addr);
 327#ifdef EEPROM_WRITE
 328        {
 329        u8 cr;
 330        /* Get the CR contents. */
 331        get_registers(dev, CR, 1, &cr);
 332        /* Set the WEPROM bit (eeprom write enable). */
 333        cr |= 0x20;
 334        set_registers(dev, CR, 1, &cr);
 335        /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
 336           so we need to split them up. */
 337        for (i = 0; i * 2 < netdev->addr_len; i++) {
 338                set_registers(dev, IDR_EEPROM + (i * 2), 2, 
 339                netdev->dev_addr + (i * 2));
 340        }
 341        /* Clear the WEPROM bit (preventing accidental eeprom writes). */
 342        cr &= 0xdf;
 343        set_registers(dev, CR, 1, &cr);
 344        }
 345#endif
 346        return 0;
 347}
 348
 349static int rtl8150_reset(rtl8150_t * dev)
 350{
 351        u8 data = 0x10;
 352        int i = HZ;
 353
 354        set_registers(dev, CR, 1, &data);
 355        do {
 356                get_registers(dev, CR, 1, &data);
 357        } while ((data & 0x10) && --i);
 358
 359        return (i > 0) ? 1 : 0;
 360}
 361
 362static int alloc_all_urbs(rtl8150_t * dev)
 363{
 364        dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 365        if (!dev->rx_urb)
 366                return 0;
 367        dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 368        if (!dev->tx_urb) {
 369                usb_free_urb(dev->rx_urb);
 370                return 0;
 371        }
 372        dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
 373        if (!dev->intr_urb) {
 374                usb_free_urb(dev->rx_urb);
 375                usb_free_urb(dev->tx_urb);
 376                return 0;
 377        }
 378        dev->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
 379        if (!dev->intr_urb) {
 380                usb_free_urb(dev->rx_urb);
 381                usb_free_urb(dev->tx_urb);
 382                usb_free_urb(dev->intr_urb);
 383                return 0;
 384        }
 385
 386        return 1;
 387}
 388
 389static void free_all_urbs(rtl8150_t * dev)
 390{
 391        usb_free_urb(dev->rx_urb);
 392        usb_free_urb(dev->tx_urb);
 393        usb_free_urb(dev->intr_urb);
 394        usb_free_urb(dev->ctrl_urb);
 395}
 396
 397static void unlink_all_urbs(rtl8150_t * dev)
 398{
 399        usb_kill_urb(dev->rx_urb);
 400        usb_kill_urb(dev->tx_urb);
 401        usb_kill_urb(dev->intr_urb);
 402        usb_kill_urb(dev->ctrl_urb);
 403}
 404
 405static inline struct sk_buff *pull_skb(rtl8150_t *dev)
 406{
 407        struct sk_buff *skb;
 408        int i;
 409
 410        for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 411                if (dev->rx_skb_pool[i]) {
 412                        skb = dev->rx_skb_pool[i];
 413                        dev->rx_skb_pool[i] = NULL;
 414                        return skb;
 415                }
 416        }
 417        return NULL;
 418}
 419
 420static void read_bulk_callback(struct urb *urb)
 421{
 422        rtl8150_t *dev;
 423        unsigned pkt_len, res;
 424        struct sk_buff *skb;
 425        struct net_device *netdev;
 426        u16 rx_stat;
 427        int status;
 428
 429        dev = urb->context;
 430        if (!dev)
 431                return;
 432        if (test_bit(RTL8150_UNPLUG, &dev->flags))
 433                return;
 434        netdev = dev->netdev;
 435        if (!netif_device_present(netdev))
 436                return;
 437
 438        switch (urb->status) {
 439        case 0:
 440                break;
 441        case -ENOENT:
 442                return; /* the urb is in unlink state */
 443        case -ETIME:
 444                warn("may be reset is needed?..");
 445                goto goon;
 446        default:
 447                warn("Rx status %d", urb->status);
 448                goto goon;
 449        }
 450
 451        if (!dev->rx_skb)
 452                goto resched;
 453        /* protect against short packets (tell me why we got some?!?) */
 454        if (urb->actual_length < 4)
 455                goto goon;
 456
 457        res = urb->actual_length;
 458        rx_stat = le16_to_cpu(*(__le16 *)(urb->transfer_buffer + res - 4));
 459        pkt_len = res - 4;
 460
 461        skb_put(dev->rx_skb, pkt_len);
 462        dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
 463        netif_rx(dev->rx_skb);
 464        dev->stats.rx_packets++;
 465        dev->stats.rx_bytes += pkt_len;
 466
 467        spin_lock(&dev->rx_pool_lock);
 468        skb = pull_skb(dev);
 469        spin_unlock(&dev->rx_pool_lock);
 470        if (!skb)
 471                goto resched;
 472
 473        dev->rx_skb = skb;
 474goon:
 475        usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 476                      dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 477        status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
 478        if (status == -ENODEV)
 479                netif_device_detach(dev->netdev);
 480        else if (status) {
 481                set_bit(RX_URB_FAIL, &dev->flags);
 482                goto resched;
 483        } else {
 484                clear_bit(RX_URB_FAIL, &dev->flags);
 485        }
 486
 487        return;
 488resched:
 489        tasklet_schedule(&dev->tl);
 490}
 491
 492static void rx_fixup(unsigned long data)
 493{
 494        rtl8150_t *dev;
 495        struct sk_buff *skb;
 496        int status;
 497
 498        dev = (rtl8150_t *)data;
 499
 500        spin_lock_irq(&dev->rx_pool_lock);
 501        fill_skb_pool(dev);
 502        spin_unlock_irq(&dev->rx_pool_lock);
 503        if (test_bit(RX_URB_FAIL, &dev->flags))
 504                if (dev->rx_skb)
 505                        goto try_again;
 506        spin_lock_irq(&dev->rx_pool_lock);
 507        skb = pull_skb(dev);
 508        spin_unlock_irq(&dev->rx_pool_lock);
 509        if (skb == NULL)
 510                goto tlsched;
 511        dev->rx_skb = skb;
 512        usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 513                      dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 514try_again:
 515        status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
 516        if (status == -ENODEV) {
 517                netif_device_detach(dev->netdev);
 518        } else if (status) {
 519                set_bit(RX_URB_FAIL, &dev->flags);
 520                goto tlsched;
 521        } else {
 522                clear_bit(RX_URB_FAIL, &dev->flags);
 523        }
 524
 525        return;
 526tlsched:
 527        tasklet_schedule(&dev->tl);
 528}
 529
 530static void write_bulk_callback(struct urb *urb)
 531{
 532        rtl8150_t *dev;
 533
 534        dev = urb->context;
 535        if (!dev)
 536                return;
 537        dev_kfree_skb_irq(dev->tx_skb);
 538        if (!netif_device_present(dev->netdev))
 539                return;
 540        if (urb->status)
 541                info("%s: Tx status %d", dev->netdev->name, urb->status);
 542        dev->netdev->trans_start = jiffies;
 543        netif_wake_queue(dev->netdev);
 544}
 545
 546static void intr_callback(struct urb *urb)
 547{
 548        rtl8150_t *dev;
 549        __u8 *d;
 550        int status;
 551
 552        dev = urb->context;
 553        if (!dev)
 554                return;
 555        switch (urb->status) {
 556        case 0:                 /* success */
 557                break;
 558        case -ECONNRESET:       /* unlink */
 559        case -ENOENT:
 560        case -ESHUTDOWN:
 561                return;
 562        /* -EPIPE:  should clear the halt */
 563        default:
 564                info("%s: intr status %d", dev->netdev->name, urb->status);
 565                goto resubmit;
 566        }
 567
 568        d = urb->transfer_buffer;
 569        if (d[0] & TSR_ERRORS) {
 570                dev->stats.tx_errors++;
 571                if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
 572                        dev->stats.tx_aborted_errors++;
 573                if (d[INT_TSR] & TSR_LCOL)
 574                        dev->stats.tx_window_errors++;
 575                if (d[INT_TSR] & TSR_LOSS_CRS)
 576                        dev->stats.tx_carrier_errors++;
 577        }
 578        /* Report link status changes to the network stack */
 579        if ((d[INT_MSR] & MSR_LINK) == 0) {
 580                if (netif_carrier_ok(dev->netdev)) {
 581                        netif_carrier_off(dev->netdev);
 582                        dbg("%s: LINK LOST\n", __func__);
 583                }
 584        } else {
 585                if (!netif_carrier_ok(dev->netdev)) {
 586                        netif_carrier_on(dev->netdev);
 587                        dbg("%s: LINK CAME BACK\n", __func__);
 588                }
 589        }
 590
 591resubmit:
 592        status = usb_submit_urb (urb, GFP_ATOMIC);
 593        if (status == -ENODEV)
 594                netif_device_detach(dev->netdev);
 595        else if (status)
 596                err ("can't resubmit intr, %s-%s/input0, status %d",
 597                                dev->udev->bus->bus_name,
 598                                dev->udev->devpath, status);
 599}
 600
 601static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
 602{
 603        rtl8150_t *dev = usb_get_intfdata(intf);
 604
 605        netif_device_detach(dev->netdev);
 606
 607        if (netif_running(dev->netdev)) {
 608                usb_kill_urb(dev->rx_urb);
 609                usb_kill_urb(dev->intr_urb);
 610        }
 611        return 0;
 612}
 613
 614static int rtl8150_resume(struct usb_interface *intf)
 615{
 616        rtl8150_t *dev = usb_get_intfdata(intf);
 617
 618        netif_device_attach(dev->netdev);
 619        if (netif_running(dev->netdev)) {
 620                dev->rx_urb->status = 0;
 621                dev->rx_urb->actual_length = 0;
 622                read_bulk_callback(dev->rx_urb);
 623
 624                dev->intr_urb->status = 0;
 625                dev->intr_urb->actual_length = 0;
 626                intr_callback(dev->intr_urb);
 627        }
 628        return 0;
 629}
 630
 631/*
 632**
 633**      network related part of the code
 634**
 635*/
 636
 637static void fill_skb_pool(rtl8150_t *dev)
 638{
 639        struct sk_buff *skb;
 640        int i;
 641
 642        for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 643                if (dev->rx_skb_pool[i])
 644                        continue;
 645                skb = dev_alloc_skb(RTL8150_MTU + 2);
 646                if (!skb) {
 647                        return;
 648                }
 649                skb_reserve(skb, 2);
 650                dev->rx_skb_pool[i] = skb;
 651        }
 652}
 653
 654static void free_skb_pool(rtl8150_t *dev)
 655{
 656        int i;
 657
 658        for (i = 0; i < RX_SKB_POOL_SIZE; i++)
 659                if (dev->rx_skb_pool[i])
 660                        dev_kfree_skb(dev->rx_skb_pool[i]);
 661}
 662
 663static int enable_net_traffic(rtl8150_t * dev)
 664{
 665        u8 cr, tcr, rcr, msr;
 666
 667        if (!rtl8150_reset(dev)) {
 668                warn("%s - device reset failed", __FUNCTION__);
 669        }
 670        /* RCR bit7=1 attach Rx info at the end;  =0 HW CRC (which is broken) */
 671        rcr = 0x9e;
 672        dev->rx_creg = cpu_to_le16(rcr);
 673        tcr = 0xd8;
 674        cr = 0x0c;
 675        if (!(rcr & 0x80))
 676                set_bit(RTL8150_HW_CRC, &dev->flags);
 677        set_registers(dev, RCR, 1, &rcr);
 678        set_registers(dev, TCR, 1, &tcr);
 679        set_registers(dev, CR, 1, &cr);
 680        get_registers(dev, MSR, 1, &msr);
 681
 682        return 0;
 683}
 684
 685static void disable_net_traffic(rtl8150_t * dev)
 686{
 687        u8 cr;
 688
 689        get_registers(dev, CR, 1, &cr);
 690        cr &= 0xf3;
 691        set_registers(dev, CR, 1, &cr);
 692}
 693
 694static struct net_device_stats *rtl8150_netdev_stats(struct net_device *dev)
 695{
 696        return &((rtl8150_t *)netdev_priv(dev))->stats;
 697}
 698
 699static void rtl8150_tx_timeout(struct net_device *netdev)
 700{
 701        rtl8150_t *dev = netdev_priv(netdev);
 702        warn("%s: Tx timeout.", netdev->name);
 703        usb_unlink_urb(dev->tx_urb);
 704        dev->stats.tx_errors++;
 705}
 706
 707static void rtl8150_set_multicast(struct net_device *netdev)
 708{
 709        rtl8150_t *dev = netdev_priv(netdev);
 710        netif_stop_queue(netdev);
 711        if (netdev->flags & IFF_PROMISC) {
 712                dev->rx_creg |= cpu_to_le16(0x0001);
 713                info("%s: promiscuous mode", netdev->name);
 714        } else if (netdev->mc_count ||
 715                   (netdev->flags & IFF_ALLMULTI)) {
 716                dev->rx_creg &= cpu_to_le16(0xfffe);
 717                dev->rx_creg |= cpu_to_le16(0x0002);
 718                info("%s: allmulti set", netdev->name);
 719        } else {
 720                /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
 721                dev->rx_creg &= cpu_to_le16(0x00fc);
 722        }
 723        async_set_registers(dev, RCR, 2);
 724        netif_wake_queue(netdev);
 725}
 726
 727static int rtl8150_start_xmit(struct sk_buff *skb, struct net_device *netdev)
 728{
 729        rtl8150_t *dev = netdev_priv(netdev);
 730        int count, res;
 731
 732        netif_stop_queue(netdev);
 733        count = (skb->len < 60) ? 60 : skb->len;
 734        count = (count & 0x3f) ? count : count + 1;
 735        dev->tx_skb = skb;
 736        usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
 737                      skb->data, count, write_bulk_callback, dev);
 738        if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
 739                /* Can we get/handle EPIPE here? */
 740                if (res == -ENODEV)
 741                        netif_device_detach(dev->netdev);
 742                else {
 743                        warn("failed tx_urb %d\n", res);
 744                        dev->stats.tx_errors++;
 745                        netif_start_queue(netdev);
 746                }
 747        } else {
 748                dev->stats.tx_packets++;
 749                dev->stats.tx_bytes += skb->len;
 750                netdev->trans_start = jiffies;
 751        }
 752
 753        return 0;
 754}
 755
 756
 757static void set_carrier(struct net_device *netdev)
 758{
 759        rtl8150_t *dev = netdev_priv(netdev);
 760        short tmp;
 761
 762        get_registers(dev, CSCR, 2, &tmp);
 763        if (tmp & CSCR_LINK_STATUS)
 764                netif_carrier_on(netdev);
 765        else
 766                netif_carrier_off(netdev);
 767}
 768
 769static int rtl8150_open(struct net_device *netdev)
 770{
 771        rtl8150_t *dev = netdev_priv(netdev);
 772        int res;
 773
 774        if (dev->rx_skb == NULL)
 775                dev->rx_skb = pull_skb(dev);
 776        if (!dev->rx_skb)
 777                return -ENOMEM;
 778
 779        set_registers(dev, IDR, 6, netdev->dev_addr);
 780        
 781        usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 782                      dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 783        if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
 784                if (res == -ENODEV)
 785                        netif_device_detach(dev->netdev);
 786                warn("%s: rx_urb submit failed: %d", __FUNCTION__, res);
 787                return res;
 788        }
 789        usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
 790                     dev->intr_buff, INTBUFSIZE, intr_callback,
 791                     dev, dev->intr_interval);
 792        if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
 793                if (res == -ENODEV)
 794                        netif_device_detach(dev->netdev);
 795                warn("%s: intr_urb submit failed: %d", __FUNCTION__, res);
 796                usb_kill_urb(dev->rx_urb);
 797                return res;
 798        }
 799        enable_net_traffic(dev);
 800        set_carrier(netdev);
 801        netif_start_queue(netdev);
 802
 803        return res;
 804}
 805
 806static int rtl8150_close(struct net_device *netdev)
 807{
 808        rtl8150_t *dev = netdev_priv(netdev);
 809        int res = 0;
 810
 811        netif_stop_queue(netdev);
 812        if (!test_bit(RTL8150_UNPLUG, &dev->flags))
 813                disable_net_traffic(dev);
 814        unlink_all_urbs(dev);
 815
 816        return res;
 817}
 818
 819static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
 820{
 821        rtl8150_t *dev = netdev_priv(netdev);
 822
 823        strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
 824        strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
 825        usb_make_path(dev->udev, info->bus_info, sizeof info->bus_info);
 826}
 827
 828static int rtl8150_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
 829{
 830        rtl8150_t *dev = netdev_priv(netdev);
 831        short lpa, bmcr;
 832
 833        ecmd->supported = (SUPPORTED_10baseT_Half |
 834                          SUPPORTED_10baseT_Full |
 835                          SUPPORTED_100baseT_Half |
 836                          SUPPORTED_100baseT_Full |
 837                          SUPPORTED_Autoneg |
 838                          SUPPORTED_TP | SUPPORTED_MII);
 839        ecmd->port = PORT_TP;
 840        ecmd->transceiver = XCVR_INTERNAL;
 841        ecmd->phy_address = dev->phy;
 842        get_registers(dev, BMCR, 2, &bmcr);
 843        get_registers(dev, ANLP, 2, &lpa);
 844        if (bmcr & BMCR_ANENABLE) {
 845                ecmd->autoneg = AUTONEG_ENABLE;
 846                ecmd->speed = (lpa & (LPA_100HALF | LPA_100FULL)) ?
 847                             SPEED_100 : SPEED_10;
 848                if (ecmd->speed == SPEED_100)
 849                        ecmd->duplex = (lpa & LPA_100FULL) ?
 850                            DUPLEX_FULL : DUPLEX_HALF;
 851                else
 852                        ecmd->duplex = (lpa & LPA_10FULL) ?
 853                            DUPLEX_FULL : DUPLEX_HALF;
 854        } else {
 855                ecmd->autoneg = AUTONEG_DISABLE;
 856                ecmd->speed = (bmcr & BMCR_SPEED100) ?
 857                    SPEED_100 : SPEED_10;
 858                ecmd->duplex = (bmcr & BMCR_FULLDPLX) ?
 859                    DUPLEX_FULL : DUPLEX_HALF;
 860        }
 861        return 0;
 862}
 863
 864static struct ethtool_ops ops = {
 865        .get_drvinfo = rtl8150_get_drvinfo,
 866        .get_settings = rtl8150_get_settings,
 867        .get_link = ethtool_op_get_link
 868};
 869
 870static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 871{
 872        rtl8150_t *dev = netdev_priv(netdev);
 873        u16 *data = (u16 *) & rq->ifr_ifru;
 874        int res = 0;
 875
 876        switch (cmd) {
 877        case SIOCDEVPRIVATE:
 878                data[0] = dev->phy;
 879        case SIOCDEVPRIVATE + 1:
 880                read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
 881                break;
 882        case SIOCDEVPRIVATE + 2:
 883                if (!capable(CAP_NET_ADMIN))
 884                        return -EPERM;
 885                write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
 886                break;
 887        default:
 888                res = -EOPNOTSUPP;
 889        }
 890
 891        return res;
 892}
 893
 894static int rtl8150_probe(struct usb_interface *intf,
 895                         const struct usb_device_id *id)
 896{
 897        struct usb_device *udev = interface_to_usbdev(intf);
 898        rtl8150_t *dev;
 899        struct net_device *netdev;
 900
 901        netdev = alloc_etherdev(sizeof(rtl8150_t));
 902        if (!netdev) {
 903                err("Out of memory");
 904                return -ENOMEM;
 905        }
 906
 907        dev = netdev_priv(netdev);
 908
 909        dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
 910        if (!dev->intr_buff) {
 911                free_netdev(netdev);
 912                return -ENOMEM;
 913        }
 914
 915        tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
 916        spin_lock_init(&dev->rx_pool_lock);
 917        
 918        dev->udev = udev;
 919        dev->netdev = netdev;
 920        netdev->open = rtl8150_open;
 921        netdev->stop = rtl8150_close;
 922        netdev->do_ioctl = rtl8150_ioctl;
 923        netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
 924        netdev->tx_timeout = rtl8150_tx_timeout;
 925        netdev->hard_start_xmit = rtl8150_start_xmit;
 926        netdev->set_multicast_list = rtl8150_set_multicast;
 927        netdev->set_mac_address = rtl8150_set_mac_address;
 928        netdev->get_stats = rtl8150_netdev_stats;
 929        netdev->mtu = RTL8150_MTU;
 930        SET_ETHTOOL_OPS(netdev, &ops);
 931        dev->intr_interval = 100;       /* 100ms */
 932
 933        if (!alloc_all_urbs(dev)) {
 934                err("out of memory");
 935                goto out;
 936        }
 937        if (!rtl8150_reset(dev)) {
 938                err("couldn't reset the device");
 939                goto out1;
 940        }
 941        fill_skb_pool(dev);
 942        set_ethernet_addr(dev);
 943        
 944        usb_set_intfdata(intf, dev);
 945        SET_NETDEV_DEV(netdev, &intf->dev);
 946        if (register_netdev(netdev) != 0) {
 947                err("couldn't register the device");
 948                goto out2;
 949        }
 950
 951        info("%s: rtl8150 is detected", netdev->name);
 952
 953        return 0;
 954
 955out2:
 956        usb_set_intfdata(intf, NULL);
 957        free_skb_pool(dev);
 958out1:
 959        free_all_urbs(dev);
 960out:
 961        kfree(dev->intr_buff);
 962        free_netdev(netdev);
 963        return -EIO;
 964}
 965
 966static void rtl8150_disconnect(struct usb_interface *intf)
 967{
 968        rtl8150_t *dev = usb_get_intfdata(intf);
 969
 970        usb_set_intfdata(intf, NULL);
 971        if (dev) {
 972                set_bit(RTL8150_UNPLUG, &dev->flags);
 973                tasklet_disable(&dev->tl);
 974                tasklet_kill(&dev->tl);
 975                unregister_netdev(dev->netdev);
 976                unlink_all_urbs(dev);
 977                free_all_urbs(dev);
 978                free_skb_pool(dev);
 979                if (dev->rx_skb)
 980                        dev_kfree_skb(dev->rx_skb);
 981                kfree(dev->intr_buff);
 982                free_netdev(dev->netdev);
 983        }
 984}
 985
 986static int __init usb_rtl8150_init(void)
 987{
 988        info(DRIVER_DESC " " DRIVER_VERSION);
 989        return usb_register(&rtl8150_driver);
 990}
 991
 992static void __exit usb_rtl8150_exit(void)
 993{
 994        usb_deregister(&rtl8150_driver);
 995}
 996
 997module_init(usb_rtl8150_init);
 998module_exit(usb_rtl8150_exit);
 999
1000MODULE_AUTHOR(DRIVER_AUTHOR);
1001MODULE_DESCRIPTION(DRIVER_DESC);
1002MODULE_LICENSE("GPL");
1003