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/signal.h>
  10#include <linux/slab.h>
  11#include <linux/module.h>
  12#include <linux/netdevice.h>
  13#include <linux/etherdevice.h>
  14#include <linux/mii.h>
  15#include <linux/ethtool.h>
  16#include <linux/usb.h>
  17#include <linux/uaccess.h>
  18
  19/* Version Information */
  20#define DRIVER_VERSION "v0.6.2 (2004/08/27)"
  21#define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>"
  22#define DRIVER_DESC "rtl8150 based usb-ethernet driver"
  23
  24#define IDR                     0x0120
  25#define MAR                     0x0126
  26#define CR                      0x012e
  27#define TCR                     0x012f
  28#define RCR                     0x0130
  29#define TSR                     0x0132
  30#define RSR                     0x0133
  31#define CON0                    0x0135
  32#define CON1                    0x0136
  33#define MSR                     0x0137
  34#define PHYADD                  0x0138
  35#define PHYDAT                  0x0139
  36#define PHYCNT                  0x013b
  37#define GPPC                    0x013d
  38#define BMCR                    0x0140
  39#define BMSR                    0x0142
  40#define ANAR                    0x0144
  41#define ANLP                    0x0146
  42#define AER                     0x0148
  43#define CSCR                    0x014C  /* This one has the link status */
  44#define CSCR_LINK_STATUS        (1 << 3)
  45
  46#define IDR_EEPROM              0x1202
  47
  48#define PHY_READ                0
  49#define PHY_WRITE               0x20
  50#define PHY_GO                  0x40
  51
  52#define MII_TIMEOUT             10
  53#define INTBUFSIZE              8
  54
  55#define RTL8150_REQT_READ       0xc0
  56#define RTL8150_REQT_WRITE      0x40
  57#define RTL8150_REQ_GET_REGS    0x05
  58#define RTL8150_REQ_SET_REGS    0x05
  59
  60
  61/* Transmit status register errors */
  62#define TSR_ECOL                (1<<5)
  63#define TSR_LCOL                (1<<4)
  64#define TSR_LOSS_CRS            (1<<3)
  65#define TSR_JBR                 (1<<2)
  66#define TSR_ERRORS              (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
  67/* Receive status register errors */
  68#define RSR_CRC                 (1<<2)
  69#define RSR_FAE                 (1<<1)
  70#define RSR_ERRORS              (RSR_CRC | RSR_FAE)
  71
  72/* Media status register definitions */
  73#define MSR_DUPLEX              (1<<4)
  74#define MSR_SPEED               (1<<3)
  75#define MSR_LINK                (1<<2)
  76
  77/* Interrupt pipe data */
  78#define INT_TSR                 0x00
  79#define INT_RSR                 0x01
  80#define INT_MSR                 0x02
  81#define INT_WAKSR               0x03
  82#define INT_TXOK_CNT            0x04
  83#define INT_RXLOST_CNT          0x05
  84#define INT_CRERR_CNT           0x06
  85#define INT_COL_CNT             0x07
  86
  87
  88#define RTL8150_MTU             1540
  89#define RTL8150_TX_TIMEOUT      (HZ)
  90#define RX_SKB_POOL_SIZE        4
  91
  92/* rtl8150 flags */
  93#define RTL8150_HW_CRC          0
  94#define RX_REG_SET              1
  95#define RTL8150_UNPLUG          2
  96#define RX_URB_FAIL             3
  97
  98/* Define these values to match your device */
  99#define VENDOR_ID_REALTEK               0x0bda
 100#define VENDOR_ID_MELCO                 0x0411
 101#define VENDOR_ID_MICRONET              0x3980
 102#define VENDOR_ID_LONGSHINE             0x07b8
 103#define VENDOR_ID_OQO                   0x1557
 104#define VENDOR_ID_ZYXEL                 0x0586
 105
 106#define PRODUCT_ID_RTL8150              0x8150
 107#define PRODUCT_ID_LUAKTX               0x0012
 108#define PRODUCT_ID_LCS8138TX            0x401a
 109#define PRODUCT_ID_SP128AR              0x0003
 110#define PRODUCT_ID_PRESTIGE             0x401a
 111
 112#undef  EEPROM_WRITE
 113
 114/* table of devices that work with this driver */
 115static struct usb_device_id rtl8150_table[] = {
 116        {USB_DEVICE(VENDOR_ID_REALTEK, PRODUCT_ID_RTL8150)},
 117        {USB_DEVICE(VENDOR_ID_MELCO, PRODUCT_ID_LUAKTX)},
 118        {USB_DEVICE(VENDOR_ID_MICRONET, PRODUCT_ID_SP128AR)},
 119        {USB_DEVICE(VENDOR_ID_LONGSHINE, PRODUCT_ID_LCS8138TX)},
 120        {USB_DEVICE(VENDOR_ID_OQO, PRODUCT_ID_RTL8150)},
 121        {USB_DEVICE(VENDOR_ID_ZYXEL, PRODUCT_ID_PRESTIGE)},
 122        {}
 123};
 124
 125MODULE_DEVICE_TABLE(usb, rtl8150_table);
 126
 127struct rtl8150 {
 128        unsigned long flags;
 129        struct usb_device *udev;
 130        struct tasklet_struct tl;
 131        struct net_device *netdev;
 132        struct urb *rx_urb, *tx_urb, *intr_urb;
 133        struct sk_buff *tx_skb, *rx_skb;
 134        struct sk_buff *rx_skb_pool[RX_SKB_POOL_SIZE];
 135        spinlock_t rx_pool_lock;
 136        struct usb_ctrlrequest dr;
 137        int intr_interval;
 138        u8 *intr_buff;
 139        u8 phy;
 140};
 141
 142typedef struct rtl8150 rtl8150_t;
 143
 144struct async_req {
 145        struct usb_ctrlrequest dr;
 146        u16 rx_creg;
 147};
 148
 149static const char driver_name [] = "rtl8150";
 150
 151/*
 152**
 153**      device related part of the code
 154**
 155*/
 156static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
 157{
 158        void *buf;
 159        int ret;
 160
 161        buf = kmalloc(size, GFP_NOIO);
 162        if (!buf)
 163                return -ENOMEM;
 164
 165        ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
 166                              RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
 167                              indx, 0, buf, size, 500);
 168        if (ret > 0 && ret <= size)
 169                memcpy(data, buf, ret);
 170        kfree(buf);
 171        return ret;
 172}
 173
 174static int set_registers(rtl8150_t * dev, u16 indx, u16 size, const void *data)
 175{
 176        void *buf;
 177        int ret;
 178
 179        buf = kmemdup(data, size, GFP_NOIO);
 180        if (!buf)
 181                return -ENOMEM;
 182
 183        ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
 184                              RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
 185                              indx, 0, buf, size, 500);
 186        kfree(buf);
 187        return ret;
 188}
 189
 190static void async_set_reg_cb(struct urb *urb)
 191{
 192        struct async_req *req = (struct async_req *)urb->context;
 193        int status = urb->status;
 194
 195        if (status < 0)
 196                dev_dbg(&urb->dev->dev, "%s failed with %d", __func__, status);
 197        kfree(req);
 198        usb_free_urb(urb);
 199}
 200
 201static int async_set_registers(rtl8150_t *dev, u16 indx, u16 size, u16 reg)
 202{
 203        int res = -ENOMEM;
 204        struct urb *async_urb;
 205        struct async_req *req;
 206
 207        req = kmalloc(sizeof(struct async_req), GFP_ATOMIC);
 208        if (req == NULL)
 209                return res;
 210        async_urb = usb_alloc_urb(0, GFP_ATOMIC);
 211        if (async_urb == NULL) {
 212                kfree(req);
 213                return res;
 214        }
 215        req->rx_creg = cpu_to_le16(reg);
 216        req->dr.bRequestType = RTL8150_REQT_WRITE;
 217        req->dr.bRequest = RTL8150_REQ_SET_REGS;
 218        req->dr.wIndex = 0;
 219        req->dr.wValue = cpu_to_le16(indx);
 220        req->dr.wLength = cpu_to_le16(size);
 221        usb_fill_control_urb(async_urb, dev->udev,
 222                             usb_sndctrlpipe(dev->udev, 0), (void *)&req->dr,
 223                             &req->rx_creg, size, async_set_reg_cb, req);
 224        res = usb_submit_urb(async_urb, GFP_ATOMIC);
 225        if (res) {
 226                if (res == -ENODEV)
 227                        netif_device_detach(dev->netdev);
 228                dev_err(&dev->udev->dev, "%s failed with %d\n", __func__, res);
 229        }
 230        return res;
 231}
 232
 233static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
 234{
 235        int i;
 236        u8 data[3], tmp;
 237
 238        data[0] = phy;
 239        data[1] = data[2] = 0;
 240        tmp = indx | PHY_READ | PHY_GO;
 241        i = 0;
 242
 243        set_registers(dev, PHYADD, sizeof(data), data);
 244        set_registers(dev, PHYCNT, 1, &tmp);
 245        do {
 246                get_registers(dev, PHYCNT, 1, data);
 247        } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 248
 249        if (i <= MII_TIMEOUT) {
 250                get_registers(dev, PHYDAT, 2, data);
 251                *reg = data[0] | (data[1] << 8);
 252                return 0;
 253        } else
 254                return 1;
 255}
 256
 257static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
 258{
 259        int i;
 260        u8 data[3], tmp;
 261
 262        data[0] = phy;
 263        data[1] = reg & 0xff;
 264        data[2] = (reg >> 8) & 0xff;
 265        tmp = indx | PHY_WRITE | PHY_GO;
 266        i = 0;
 267
 268        set_registers(dev, PHYADD, sizeof(data), data);
 269        set_registers(dev, PHYCNT, 1, &tmp);
 270        do {
 271                get_registers(dev, PHYCNT, 1, data);
 272        } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 273
 274        if (i <= MII_TIMEOUT)
 275                return 0;
 276        else
 277                return 1;
 278}
 279
 280static inline void set_ethernet_addr(rtl8150_t * dev)
 281{
 282        u8 node_id[6];
 283
 284        get_registers(dev, IDR, sizeof(node_id), node_id);
 285        memcpy(dev->netdev->dev_addr, node_id, sizeof(node_id));
 286}
 287
 288static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
 289{
 290        struct sockaddr *addr = p;
 291        rtl8150_t *dev = netdev_priv(netdev);
 292
 293        if (netif_running(netdev))
 294                return -EBUSY;
 295
 296        memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 297        netdev_dbg(netdev, "Setting MAC address to %pM\n", netdev->dev_addr);
 298        /* Set the IDR registers. */
 299        set_registers(dev, IDR, netdev->addr_len, netdev->dev_addr);
 300#ifdef EEPROM_WRITE
 301        {
 302        int i;
 303        u8 cr;
 304        /* Get the CR contents. */
 305        get_registers(dev, CR, 1, &cr);
 306        /* Set the WEPROM bit (eeprom write enable). */
 307        cr |= 0x20;
 308        set_registers(dev, CR, 1, &cr);
 309        /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
 310           so we need to split them up. */
 311        for (i = 0; i * 2 < netdev->addr_len; i++) {
 312                set_registers(dev, IDR_EEPROM + (i * 2), 2,
 313                netdev->dev_addr + (i * 2));
 314        }
 315        /* Clear the WEPROM bit (preventing accidental eeprom writes). */
 316        cr &= 0xdf;
 317        set_registers(dev, CR, 1, &cr);
 318        }
 319#endif
 320        return 0;
 321}
 322
 323static int rtl8150_reset(rtl8150_t * dev)
 324{
 325        u8 data = 0x10;
 326        int i = HZ;
 327
 328        set_registers(dev, CR, 1, &data);
 329        do {
 330                get_registers(dev, CR, 1, &data);
 331        } while ((data & 0x10) && --i);
 332
 333        return (i > 0) ? 1 : 0;
 334}
 335
 336static int alloc_all_urbs(rtl8150_t * dev)
 337{
 338        dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 339        if (!dev->rx_urb)
 340                return 0;
 341        dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 342        if (!dev->tx_urb) {
 343                usb_free_urb(dev->rx_urb);
 344                return 0;
 345        }
 346        dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
 347        if (!dev->intr_urb) {
 348                usb_free_urb(dev->rx_urb);
 349                usb_free_urb(dev->tx_urb);
 350                return 0;
 351        }
 352
 353        return 1;
 354}
 355
 356static void free_all_urbs(rtl8150_t * dev)
 357{
 358        usb_free_urb(dev->rx_urb);
 359        usb_free_urb(dev->tx_urb);
 360        usb_free_urb(dev->intr_urb);
 361}
 362
 363static void unlink_all_urbs(rtl8150_t * dev)
 364{
 365        usb_kill_urb(dev->rx_urb);
 366        usb_kill_urb(dev->tx_urb);
 367        usb_kill_urb(dev->intr_urb);
 368}
 369
 370static inline struct sk_buff *pull_skb(rtl8150_t *dev)
 371{
 372        struct sk_buff *skb;
 373        int i;
 374
 375        for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 376                if (dev->rx_skb_pool[i]) {
 377                        skb = dev->rx_skb_pool[i];
 378                        dev->rx_skb_pool[i] = NULL;
 379                        return skb;
 380                }
 381        }
 382        return NULL;
 383}
 384
 385static void read_bulk_callback(struct urb *urb)
 386{
 387        rtl8150_t *dev;
 388        unsigned pkt_len, res;
 389        struct sk_buff *skb;
 390        struct net_device *netdev;
 391        u16 rx_stat;
 392        int status = urb->status;
 393        int result;
 394
 395        dev = urb->context;
 396        if (!dev)
 397                return;
 398        if (test_bit(RTL8150_UNPLUG, &dev->flags))
 399                return;
 400        netdev = dev->netdev;
 401        if (!netif_device_present(netdev))
 402                return;
 403
 404        switch (status) {
 405        case 0:
 406                break;
 407        case -ENOENT:
 408                return; /* the urb is in unlink state */
 409        case -ETIME:
 410                if (printk_ratelimit())
 411                        dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
 412                goto goon;
 413        default:
 414                if (printk_ratelimit())
 415                        dev_warn(&urb->dev->dev, "Rx status %d\n", status);
 416                goto goon;
 417        }
 418
 419        if (!dev->rx_skb)
 420                goto resched;
 421        /* protect against short packets (tell me why we got some?!?) */
 422        if (urb->actual_length < 4)
 423                goto goon;
 424
 425        res = urb->actual_length;
 426        rx_stat = le16_to_cpu(*(__le16 *)(urb->transfer_buffer + res - 4));
 427        pkt_len = res - 4;
 428
 429        skb_put(dev->rx_skb, pkt_len);
 430        dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
 431        netif_rx(dev->rx_skb);
 432        netdev->stats.rx_packets++;
 433        netdev->stats.rx_bytes += pkt_len;
 434
 435        spin_lock(&dev->rx_pool_lock);
 436        skb = pull_skb(dev);
 437        spin_unlock(&dev->rx_pool_lock);
 438        if (!skb)
 439                goto resched;
 440
 441        dev->rx_skb = skb;
 442goon:
 443        usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 444                      dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 445        result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
 446        if (result == -ENODEV)
 447                netif_device_detach(dev->netdev);
 448        else if (result) {
 449                set_bit(RX_URB_FAIL, &dev->flags);
 450                goto resched;
 451        } else {
 452                clear_bit(RX_URB_FAIL, &dev->flags);
 453        }
 454
 455        return;
 456resched:
 457        tasklet_schedule(&dev->tl);
 458}
 459
 460static void write_bulk_callback(struct urb *urb)
 461{
 462        rtl8150_t *dev;
 463        int status = urb->status;
 464
 465        dev = urb->context;
 466        if (!dev)
 467                return;
 468        dev_kfree_skb_irq(dev->tx_skb);
 469        if (!netif_device_present(dev->netdev))
 470                return;
 471        if (status)
 472                dev_info(&urb->dev->dev, "%s: Tx status %d\n",
 473                         dev->netdev->name, status);
 474        netif_trans_update(dev->netdev);
 475        netif_wake_queue(dev->netdev);
 476}
 477
 478static void intr_callback(struct urb *urb)
 479{
 480        rtl8150_t *dev;
 481        __u8 *d;
 482        int status = urb->status;
 483        int res;
 484
 485        dev = urb->context;
 486        if (!dev)
 487                return;
 488        switch (status) {
 489        case 0:                 /* success */
 490                break;
 491        case -ECONNRESET:       /* unlink */
 492        case -ENOENT:
 493        case -ESHUTDOWN:
 494                return;
 495        /* -EPIPE:  should clear the halt */
 496        default:
 497                dev_info(&urb->dev->dev, "%s: intr status %d\n",
 498                         dev->netdev->name, status);
 499                goto resubmit;
 500        }
 501
 502        d = urb->transfer_buffer;
 503        if (d[0] & TSR_ERRORS) {
 504                dev->netdev->stats.tx_errors++;
 505                if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
 506                        dev->netdev->stats.tx_aborted_errors++;
 507                if (d[INT_TSR] & TSR_LCOL)
 508                        dev->netdev->stats.tx_window_errors++;
 509                if (d[INT_TSR] & TSR_LOSS_CRS)
 510                        dev->netdev->stats.tx_carrier_errors++;
 511        }
 512        /* Report link status changes to the network stack */
 513        if ((d[INT_MSR] & MSR_LINK) == 0) {
 514                if (netif_carrier_ok(dev->netdev)) {
 515                        netif_carrier_off(dev->netdev);
 516                        netdev_dbg(dev->netdev, "%s: LINK LOST\n", __func__);
 517                }
 518        } else {
 519                if (!netif_carrier_ok(dev->netdev)) {
 520                        netif_carrier_on(dev->netdev);
 521                        netdev_dbg(dev->netdev, "%s: LINK CAME BACK\n", __func__);
 522                }
 523        }
 524
 525resubmit:
 526        res = usb_submit_urb (urb, GFP_ATOMIC);
 527        if (res == -ENODEV)
 528                netif_device_detach(dev->netdev);
 529        else if (res)
 530                dev_err(&dev->udev->dev,
 531                        "can't resubmit intr, %s-%s/input0, status %d\n",
 532                        dev->udev->bus->bus_name, dev->udev->devpath, res);
 533}
 534
 535static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
 536{
 537        rtl8150_t *dev = usb_get_intfdata(intf);
 538
 539        netif_device_detach(dev->netdev);
 540
 541        if (netif_running(dev->netdev)) {
 542                usb_kill_urb(dev->rx_urb);
 543                usb_kill_urb(dev->intr_urb);
 544        }
 545        return 0;
 546}
 547
 548static int rtl8150_resume(struct usb_interface *intf)
 549{
 550        rtl8150_t *dev = usb_get_intfdata(intf);
 551
 552        netif_device_attach(dev->netdev);
 553        if (netif_running(dev->netdev)) {
 554                dev->rx_urb->status = 0;
 555                dev->rx_urb->actual_length = 0;
 556                read_bulk_callback(dev->rx_urb);
 557
 558                dev->intr_urb->status = 0;
 559                dev->intr_urb->actual_length = 0;
 560                intr_callback(dev->intr_urb);
 561        }
 562        return 0;
 563}
 564
 565/*
 566**
 567**      network related part of the code
 568**
 569*/
 570
 571static void fill_skb_pool(rtl8150_t *dev)
 572{
 573        struct sk_buff *skb;
 574        int i;
 575
 576        for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 577                if (dev->rx_skb_pool[i])
 578                        continue;
 579                skb = dev_alloc_skb(RTL8150_MTU + 2);
 580                if (!skb) {
 581                        return;
 582                }
 583                skb_reserve(skb, 2);
 584                dev->rx_skb_pool[i] = skb;
 585        }
 586}
 587
 588static void free_skb_pool(rtl8150_t *dev)
 589{
 590        int i;
 591
 592        for (i = 0; i < RX_SKB_POOL_SIZE; i++)
 593                if (dev->rx_skb_pool[i])
 594                        dev_kfree_skb(dev->rx_skb_pool[i]);
 595}
 596
 597static void rx_fixup(unsigned long data)
 598{
 599        struct rtl8150 *dev = (struct rtl8150 *)data;
 600        struct sk_buff *skb;
 601        int status;
 602
 603        spin_lock_irq(&dev->rx_pool_lock);
 604        fill_skb_pool(dev);
 605        spin_unlock_irq(&dev->rx_pool_lock);
 606        if (test_bit(RX_URB_FAIL, &dev->flags))
 607                if (dev->rx_skb)
 608                        goto try_again;
 609        spin_lock_irq(&dev->rx_pool_lock);
 610        skb = pull_skb(dev);
 611        spin_unlock_irq(&dev->rx_pool_lock);
 612        if (skb == NULL)
 613                goto tlsched;
 614        dev->rx_skb = skb;
 615        usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 616                      dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 617try_again:
 618        status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
 619        if (status == -ENODEV) {
 620                netif_device_detach(dev->netdev);
 621        } else if (status) {
 622                set_bit(RX_URB_FAIL, &dev->flags);
 623                goto tlsched;
 624        } else {
 625                clear_bit(RX_URB_FAIL, &dev->flags);
 626        }
 627
 628        return;
 629tlsched:
 630        tasklet_schedule(&dev->tl);
 631}
 632
 633static int enable_net_traffic(rtl8150_t * dev)
 634{
 635        u8 cr, tcr, rcr, msr;
 636
 637        if (!rtl8150_reset(dev)) {
 638                dev_warn(&dev->udev->dev, "device reset failed\n");
 639        }
 640        /* RCR bit7=1 attach Rx info at the end;  =0 HW CRC (which is broken) */
 641        rcr = 0x9e;
 642        tcr = 0xd8;
 643        cr = 0x0c;
 644        if (!(rcr & 0x80))
 645                set_bit(RTL8150_HW_CRC, &dev->flags);
 646        set_registers(dev, RCR, 1, &rcr);
 647        set_registers(dev, TCR, 1, &tcr);
 648        set_registers(dev, CR, 1, &cr);
 649        get_registers(dev, MSR, 1, &msr);
 650
 651        return 0;
 652}
 653
 654static void disable_net_traffic(rtl8150_t * dev)
 655{
 656        u8 cr;
 657
 658        get_registers(dev, CR, 1, &cr);
 659        cr &= 0xf3;
 660        set_registers(dev, CR, 1, &cr);
 661}
 662
 663static void rtl8150_tx_timeout(struct net_device *netdev)
 664{
 665        rtl8150_t *dev = netdev_priv(netdev);
 666        dev_warn(&netdev->dev, "Tx timeout.\n");
 667        usb_unlink_urb(dev->tx_urb);
 668        netdev->stats.tx_errors++;
 669}
 670
 671static void rtl8150_set_multicast(struct net_device *netdev)
 672{
 673        rtl8150_t *dev = netdev_priv(netdev);
 674        u16 rx_creg = 0x9e;
 675
 676        netif_stop_queue(netdev);
 677        if (netdev->flags & IFF_PROMISC) {
 678                rx_creg |= 0x0001;
 679                dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
 680        } else if (!netdev_mc_empty(netdev) ||
 681                   (netdev->flags & IFF_ALLMULTI)) {
 682                rx_creg &= 0xfffe;
 683                rx_creg |= 0x0002;
 684                dev_info(&netdev->dev, "%s: allmulti set\n", netdev->name);
 685        } else {
 686                /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
 687                rx_creg &= 0x00fc;
 688        }
 689        async_set_registers(dev, RCR, sizeof(rx_creg), rx_creg);
 690        netif_wake_queue(netdev);
 691}
 692
 693static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb,
 694                                            struct net_device *netdev)
 695{
 696        rtl8150_t *dev = netdev_priv(netdev);
 697        int count, res;
 698
 699        netif_stop_queue(netdev);
 700        count = (skb->len < 60) ? 60 : skb->len;
 701        count = (count & 0x3f) ? count : count + 1;
 702        dev->tx_skb = skb;
 703        usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
 704                      skb->data, count, write_bulk_callback, dev);
 705        if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
 706                /* Can we get/handle EPIPE here? */
 707                if (res == -ENODEV)
 708                        netif_device_detach(dev->netdev);
 709                else {
 710                        dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
 711                        netdev->stats.tx_errors++;
 712                        netif_start_queue(netdev);
 713                }
 714        } else {
 715                netdev->stats.tx_packets++;
 716                netdev->stats.tx_bytes += skb->len;
 717                netif_trans_update(netdev);
 718        }
 719
 720        return NETDEV_TX_OK;
 721}
 722
 723
 724static void set_carrier(struct net_device *netdev)
 725{
 726        rtl8150_t *dev = netdev_priv(netdev);
 727        short tmp;
 728
 729        get_registers(dev, CSCR, 2, &tmp);
 730        if (tmp & CSCR_LINK_STATUS)
 731                netif_carrier_on(netdev);
 732        else
 733                netif_carrier_off(netdev);
 734}
 735
 736static int rtl8150_open(struct net_device *netdev)
 737{
 738        rtl8150_t *dev = netdev_priv(netdev);
 739        int res;
 740
 741        if (dev->rx_skb == NULL)
 742                dev->rx_skb = pull_skb(dev);
 743        if (!dev->rx_skb)
 744                return -ENOMEM;
 745
 746        set_registers(dev, IDR, 6, netdev->dev_addr);
 747
 748        usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 749                      dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 750        if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
 751                if (res == -ENODEV)
 752                        netif_device_detach(dev->netdev);
 753                dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
 754                return res;
 755        }
 756        usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
 757                     dev->intr_buff, INTBUFSIZE, intr_callback,
 758                     dev, dev->intr_interval);
 759        if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
 760                if (res == -ENODEV)
 761                        netif_device_detach(dev->netdev);
 762                dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
 763                usb_kill_urb(dev->rx_urb);
 764                return res;
 765        }
 766        enable_net_traffic(dev);
 767        set_carrier(netdev);
 768        netif_start_queue(netdev);
 769
 770        return res;
 771}
 772
 773static int rtl8150_close(struct net_device *netdev)
 774{
 775        rtl8150_t *dev = netdev_priv(netdev);
 776
 777        netif_stop_queue(netdev);
 778        if (!test_bit(RTL8150_UNPLUG, &dev->flags))
 779                disable_net_traffic(dev);
 780        unlink_all_urbs(dev);
 781
 782        return 0;
 783}
 784
 785static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
 786{
 787        rtl8150_t *dev = netdev_priv(netdev);
 788
 789        strlcpy(info->driver, driver_name, sizeof(info->driver));
 790        strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
 791        usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info));
 792}
 793
 794static int rtl8150_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
 795{
 796        rtl8150_t *dev = netdev_priv(netdev);
 797        short lpa, bmcr;
 798
 799        ecmd->supported = (SUPPORTED_10baseT_Half |
 800                          SUPPORTED_10baseT_Full |
 801                          SUPPORTED_100baseT_Half |
 802                          SUPPORTED_100baseT_Full |
 803                          SUPPORTED_Autoneg |
 804                          SUPPORTED_TP | SUPPORTED_MII);
 805        ecmd->port = PORT_TP;
 806        ecmd->transceiver = XCVR_INTERNAL;
 807        ecmd->phy_address = dev->phy;
 808        get_registers(dev, BMCR, 2, &bmcr);
 809        get_registers(dev, ANLP, 2, &lpa);
 810        if (bmcr & BMCR_ANENABLE) {
 811                u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ?
 812                             SPEED_100 : SPEED_10);
 813                ethtool_cmd_speed_set(ecmd, speed);
 814                ecmd->autoneg = AUTONEG_ENABLE;
 815                if (speed == SPEED_100)
 816                        ecmd->duplex = (lpa & LPA_100FULL) ?
 817                            DUPLEX_FULL : DUPLEX_HALF;
 818                else
 819                        ecmd->duplex = (lpa & LPA_10FULL) ?
 820                            DUPLEX_FULL : DUPLEX_HALF;
 821        } else {
 822                ecmd->autoneg = AUTONEG_DISABLE;
 823                ethtool_cmd_speed_set(ecmd, ((bmcr & BMCR_SPEED100) ?
 824                                             SPEED_100 : SPEED_10));
 825                ecmd->duplex = (bmcr & BMCR_FULLDPLX) ?
 826                    DUPLEX_FULL : DUPLEX_HALF;
 827        }
 828        return 0;
 829}
 830
 831static const struct ethtool_ops ops = {
 832        .get_drvinfo = rtl8150_get_drvinfo,
 833        .get_settings = rtl8150_get_settings,
 834        .get_link = ethtool_op_get_link
 835};
 836
 837static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 838{
 839        rtl8150_t *dev = netdev_priv(netdev);
 840        u16 *data = (u16 *) & rq->ifr_ifru;
 841        int res = 0;
 842
 843        switch (cmd) {
 844        case SIOCDEVPRIVATE:
 845                data[0] = dev->phy;
 846        case SIOCDEVPRIVATE + 1:
 847                read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
 848                break;
 849        case SIOCDEVPRIVATE + 2:
 850                if (!capable(CAP_NET_ADMIN))
 851                        return -EPERM;
 852                write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
 853                break;
 854        default:
 855                res = -EOPNOTSUPP;
 856        }
 857
 858        return res;
 859}
 860
 861static const struct net_device_ops rtl8150_netdev_ops = {
 862        .ndo_open               = rtl8150_open,
 863        .ndo_stop               = rtl8150_close,
 864        .ndo_do_ioctl           = rtl8150_ioctl,
 865        .ndo_start_xmit         = rtl8150_start_xmit,
 866        .ndo_tx_timeout         = rtl8150_tx_timeout,
 867        .ndo_set_rx_mode        = rtl8150_set_multicast,
 868        .ndo_set_mac_address    = rtl8150_set_mac_address,
 869
 870        .ndo_validate_addr      = eth_validate_addr,
 871};
 872
 873static int rtl8150_probe(struct usb_interface *intf,
 874                         const struct usb_device_id *id)
 875{
 876        struct usb_device *udev = interface_to_usbdev(intf);
 877        rtl8150_t *dev;
 878        struct net_device *netdev;
 879
 880        netdev = alloc_etherdev(sizeof(rtl8150_t));
 881        if (!netdev)
 882                return -ENOMEM;
 883
 884        dev = netdev_priv(netdev);
 885
 886        dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
 887        if (!dev->intr_buff) {
 888                free_netdev(netdev);
 889                return -ENOMEM;
 890        }
 891
 892        tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
 893        spin_lock_init(&dev->rx_pool_lock);
 894
 895        dev->udev = udev;
 896        dev->netdev = netdev;
 897        netdev->netdev_ops = &rtl8150_netdev_ops;
 898        netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
 899        netdev->ethtool_ops = &ops;
 900        dev->intr_interval = 100;       /* 100ms */
 901
 902        if (!alloc_all_urbs(dev)) {
 903                dev_err(&intf->dev, "out of memory\n");
 904                goto out;
 905        }
 906        if (!rtl8150_reset(dev)) {
 907                dev_err(&intf->dev, "couldn't reset the device\n");
 908                goto out1;
 909        }
 910        fill_skb_pool(dev);
 911        set_ethernet_addr(dev);
 912
 913        usb_set_intfdata(intf, dev);
 914        SET_NETDEV_DEV(netdev, &intf->dev);
 915        if (register_netdev(netdev) != 0) {
 916                dev_err(&intf->dev, "couldn't register the device\n");
 917                goto out2;
 918        }
 919
 920        dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
 921
 922        return 0;
 923
 924out2:
 925        usb_set_intfdata(intf, NULL);
 926        free_skb_pool(dev);
 927out1:
 928        free_all_urbs(dev);
 929out:
 930        kfree(dev->intr_buff);
 931        free_netdev(netdev);
 932        return -EIO;
 933}
 934
 935static void rtl8150_disconnect(struct usb_interface *intf)
 936{
 937        rtl8150_t *dev = usb_get_intfdata(intf);
 938
 939        usb_set_intfdata(intf, NULL);
 940        if (dev) {
 941                set_bit(RTL8150_UNPLUG, &dev->flags);
 942                tasklet_kill(&dev->tl);
 943                unregister_netdev(dev->netdev);
 944                unlink_all_urbs(dev);
 945                free_all_urbs(dev);
 946                free_skb_pool(dev);
 947                if (dev->rx_skb)
 948                        dev_kfree_skb(dev->rx_skb);
 949                kfree(dev->intr_buff);
 950                free_netdev(dev->netdev);
 951        }
 952}
 953
 954static struct usb_driver rtl8150_driver = {
 955        .name           = driver_name,
 956        .probe          = rtl8150_probe,
 957        .disconnect     = rtl8150_disconnect,
 958        .id_table       = rtl8150_table,
 959        .suspend        = rtl8150_suspend,
 960        .resume         = rtl8150_resume,
 961        .disable_hub_initiated_lpm = 1,
 962};
 963
 964module_usb_driver(rtl8150_driver);
 965
 966MODULE_AUTHOR(DRIVER_AUTHOR);
 967MODULE_DESCRIPTION(DRIVER_DESC);
 968MODULE_LICENSE("GPL");
 969