drivers/net/usb/rtl8150.c

   1 /*
   2  *  Copyright (c) 2002 Petko Manolov ([email protected])
   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 <[email protected]>"
  22 #define DRIVER_DESC "rtl8150 based usb-ethernet driver"
  23
  24 #define IDR                     0x0120
  25 #define MAR                     0x0126
  26 #define CR                      0x012e
  27 #define TCR                     0x012f
  28 #define RCR                     0x0130
  29 #define TSR                     0x0132
  30 #define RSR                     0x0133
  31 #define CON0                    0x0135
  32 #define CON1                    0x0136
  33 #define MSR                     0x0137
  34 #define PHYADD                  0x0138
  35 #define PHYDAT                  0x0139
  36 #define PHYCNT                  0x013b
  37 #define GPPC                    0x013d
  38 #define BMCR                    0x0140
  39 #define BMSR                    0x0142
  40 #define ANAR                    0x0144
  41 #define ANLP                    0x0146
  42 #define AER                     0x0148
  43 #define CSCR                    0x014C  /* This one has the link status */
  44 #define CSCR_LINK_STATUS        (1 << 3)
  45
  46 #define IDR_EEPROM              0x1202
  47
  48 #define PHY_READ                0
  49 #define PHY_WRITE               0x20
  50 #define PHY_GO                  0x40
  51
  52 #define MII_TIMEOUT             10
  53 #define INTBUFSIZE              8
  54
  55 #define RTL8150_REQT_READ       0xc0
  56 #define RTL8150_REQT_WRITE      0x40
  57 #define RTL8150_REQ_GET_REGS    0x05
  58 #define RTL8150_REQ_SET_REGS    0x05
  59
  60
  61 /* Transmit status register errors */
  62 #define TSR_ECOL                (1<<5)
  63 #define TSR_LCOL                (1<<4)
  64 #define TSR_LOSS_CRS            (1<<3)
  65 #define TSR_JBR                 (1<<2)
  66 #define TSR_ERRORS              (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
  67 /* Receive status register errors */
  68 #define RSR_CRC                 (1<<2)
  69 #define RSR_FAE                 (1<<1)
  70 #define RSR_ERRORS              (RSR_CRC | RSR_FAE)
  71
  72 /* Media status register definitions */
  73 #define MSR_DUPLEX              (1<<4)
  74 #define MSR_SPEED               (1<<3)
  75 #define MSR_LINK                (1<<2)
  76
  77 /* Interrupt pipe data */
  78 #define INT_TSR                 0x00
  79 #define INT_RSR                 0x01
  80 #define INT_MSR                 0x02
  81 #define INT_WAKSR               0x03
  82 #define INT_TXOK_CNT            0x04
  83 #define INT_RXLOST_CNT          0x05
  84 #define INT_CRERR_CNT           0x06
  85 #define INT_COL_CNT             0x07
  86
  87
  88 #define RTL8150_MTU             1540
  89 #define RTL8150_TX_TIMEOUT      (HZ)
  90 #define RX_SKB_POOL_SIZE        4
  91
  92 /* rtl8150 flags */
  93 #define RTL8150_HW_CRC          0
  94 #define RX_REG_SET              1
  95 #define RTL8150_UNPLUG          2
  96 #define RX_URB_FAIL             3
  97
  98 /* Define these values to match your device */
  99 #define VENDOR_ID_REALTEK               0x0bda
 100 #define VENDOR_ID_MELCO                 0x0411
 101 #define VENDOR_ID_MICRONET              0x3980
 102 #define VENDOR_ID_LONGSHINE             0x07b8
 103 #define VENDOR_ID_OQO                   0x1557
 104 #define VENDOR_ID_ZYXEL                 0x0586
 105
 106 #define PRODUCT_ID_RTL8150              0x8150
 107 #define PRODUCT_ID_LUAKTX               0x0012
 108 #define PRODUCT_ID_LCS8138TX            0x401a
 109 #define PRODUCT_ID_SP128AR              0x0003
 110 #define PRODUCT_ID_PRESTIGE             0x401a
 111
 112 #undef  EEPROM_WRITE
 113
 114 /* table of devices that work with this driver */
 115 static const struct usb_device_id rtl8150_table[] = {
 116         {USB_DEVICE(VENDOR_ID_REALTEK, PRODUCT_ID_RTL8150)},
 117         {USB_DEVICE(VENDOR_ID_MELCO, PRODUCT_ID_LUAKTX)},
 118         {USB_DEVICE(VENDOR_ID_MICRONET, PRODUCT_ID_SP128AR)},
 119         {USB_DEVICE(VENDOR_ID_LONGSHINE, PRODUCT_ID_LCS8138TX)},
 120         {USB_DEVICE(VENDOR_ID_OQO, PRODUCT_ID_RTL8150)},
 121         {USB_DEVICE(VENDOR_ID_ZYXEL, PRODUCT_ID_PRESTIGE)},
 122         {}
 123 };
 124
 125 MODULE_DEVICE_TABLE(usb, rtl8150_table);
 126
 127 struct rtl8150 {
 128         unsigned long flags;
 129         struct usb_device *udev;
 130         struct tasklet_struct tl;
 131         struct net_device *netdev;
 132         struct urb *rx_urb, *tx_urb, *intr_urb;
 133         struct sk_buff *tx_skb, *rx_skb;
 134         struct sk_buff *rx_skb_pool[RX_SKB_POOL_SIZE];
 135         spinlock_t rx_pool_lock;
 136         struct usb_ctrlrequest dr;
 137         int intr_interval;
 138         u8 *intr_buff;
 139         u8 phy;
 140 };
 141
 142 typedef struct rtl8150 rtl8150_t;
 143
 144 struct async_req {
 145         struct usb_ctrlrequest dr;
 146         u16 rx_creg;
 147 };
 148
 149 static const char driver_name [] = "rtl8150";
 150
 151 /*
 152 **
 153 **      device related part of the code
 154 **
 155 */
 156 static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
 157 {
 158         void *buf;
 159         int ret;
 160
 161         buf = kmalloc(size, GFP_NOIO);
 162         if (!buf)
 163                 return -ENOMEM;
 164
 165         ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
 166                               RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
 167                               indx, 0, buf, size, 500);
 168         if (ret > 0 && ret <= size)
 169                 memcpy(data, buf, ret);
 170         kfree(buf);
 171         return ret;
 172 }
 173
 174 static int set_registers(rtl8150_t * dev, u16 indx, u16 size, const void *data)
 175 {
 176         void *buf;
 177         int ret;
 178
 179         buf = kmemdup(data, size, GFP_NOIO);
 180         if (!buf)
 181                 return -ENOMEM;
 182
 183         ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
 184                               RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
 185                               indx, 0, buf, size, 500);
 186         kfree(buf);
 187         return ret;
 188 }
 189
 190 static void async_set_reg_cb(struct urb *urb)
 191 {
 192         struct async_req *req = (struct async_req *)urb->context;
 193         int status = urb->status;
 194
 195         if (status < 0)
 196                 dev_dbg(&urb->dev->dev, "%s failed with %d", __func__, status);
 197         kfree(req);
 198         usb_free_urb(urb);
 199 }
 200
 201 static int async_set_registers(rtl8150_t *dev, u16 indx, u16 size, u16 reg)
 202 {
 203         int res = -ENOMEM;
 204         struct urb *async_urb;
 205         struct async_req *req;
 206
 207         req = kmalloc(sizeof(struct async_req), GFP_ATOMIC);
 208         if (req == NULL)
 209                 return res;
 210         async_urb = usb_alloc_urb(0, GFP_ATOMIC);
 211         if (async_urb == NULL) {
 212                 kfree(req);
 213                 return res;
 214         }
 215         req->rx_creg = cpu_to_le16(reg);
 216         req->dr.bRequestType = RTL8150_REQT_WRITE;
 217         req->dr.bRequest = RTL8150_REQ_SET_REGS;
 218         req->dr.wIndex = 0;
 219         req->dr.wValue = cpu_to_le16(indx);
 220         req->dr.wLength = cpu_to_le16(size);
 221         usb_fill_control_urb(async_urb, dev->udev,
 222                              usb_sndctrlpipe(dev->udev, 0), (void *)&req->dr,
 223                              &req->rx_creg, size, async_set_reg_cb, req);
 224         res = usb_submit_urb(async_urb, GFP_ATOMIC);
 225         if (res) {
 226                 if (res == -ENODEV)
 227                         netif_device_detach(dev->netdev);
 228                 dev_err(&dev->udev->dev, "%s failed with %d\n", __func__, res);
 229         }
 230         return res;
 231 }
 232
 233 static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
 234 {
 235         int i;
 236         u8 data[3], tmp;
 237
 238         data[0] = phy;
 239         data[1] = data[2] = 0;
 240         tmp = indx | PHY_READ | PHY_GO;
 241         i = 0;
 242
 243         set_registers(dev, PHYADD, sizeof(data), data);
 244         set_registers(dev, PHYCNT, 1, &tmp);
 245         do {
 246                 get_registers(dev, PHYCNT, 1, data);
 247         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 248
 249         if (i <= MII_TIMEOUT) {
 250                 get_registers(dev, PHYDAT, 2, data);
 251                 *reg = data[0] | (data[1] << 8);
 252                 return 0;
 253         } else
 254                 return 1;
 255 }
 256
 257 static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
 258 {
 259         int i;
 260         u8 data[3], tmp;
 261
 262         data[0] = phy;
 263         data[1] = reg & 0xff;
 264         data[2] = (reg >> 8) & 0xff;
 265         tmp = indx | PHY_WRITE | PHY_GO;
 266         i = 0;
 267
 268         set_registers(dev, PHYADD, sizeof(data), data);
 269         set_registers(dev, PHYCNT, 1, &tmp);
 270         do {
 271                 get_registers(dev, PHYCNT, 1, data);
 272         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 273
 274         if (i <= MII_TIMEOUT)
 275                 return 0;
 276         else
 277                 return 1;
 278 }
 279
 280 static 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
 288 static 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
 323 static 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
 336 static 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
 356 static 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
 363 static 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
 370 static 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
 385 static 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         unsigned long flags;
 395
 396         dev = urb->context;
 397         if (!dev)
 398                 return;
 399         if (test_bit(RTL8150_UNPLUG, &dev->flags))
 400                 return;
 401         netdev = dev->netdev;
 402         if (!netif_device_present(netdev))
 403                 return;
 404
 405         switch (status) {
 406         case 0:
 407                 break;
 408         case -ENOENT:
 409                 return; /* the urb is in unlink state */
 410         case -ETIME:
 411                 if (printk_ratelimit())
 412                         dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
 413                 goto goon;
 414         default:
 415                 if (printk_ratelimit())
 416                         dev_warn(&urb->dev->dev, "Rx status %d\n", status);
 417                 goto goon;
 418         }
 419
 420         if (!dev->rx_skb)
 421                 goto resched;
 422         /* protect against short packets (tell me why we got some?!?) */
 423         if (urb->actual_length < 4)
 424                 goto goon;
 425
 426         res = urb->actual_length;
 427         rx_stat = le16_to_cpu(*(__le16 *)(urb->transfer_buffer + res - 4));
 428         pkt_len = res - 4;
 429
 430         skb_put(dev->rx_skb, pkt_len);
 431         dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
 432         netif_rx(dev->rx_skb);
 433         netdev->stats.rx_packets++;
 434         netdev->stats.rx_bytes += pkt_len;
 435
 436         spin_lock_irqsave(&dev->rx_pool_lock, flags);
 437         skb = pull_skb(dev);
 438         spin_unlock_irqrestore(&dev->rx_pool_lock, flags);
 439         if (!skb)
 440                 goto resched;
 441
 442         dev->rx_skb = skb;
 443 goon:
 444         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 445                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 446         result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
 447         if (result == -ENODEV)
 448                 netif_device_detach(dev->netdev);
 449         else if (result) {
 450                 set_bit(RX_URB_FAIL, &dev->flags);
 451                 goto resched;
 452         } else {
 453                 clear_bit(RX_URB_FAIL, &dev->flags);
 454         }
 455
 456         return;
 457 resched:
 458         tasklet_schedule(&dev->tl);
 459 }
 460
 461 static void write_bulk_callback(struct urb *urb)
 462 {
 463         rtl8150_t *dev;
 464         int status = urb->status;
 465
 466         dev = urb->context;
 467         if (!dev)
 468                 return;
 469         dev_kfree_skb_irq(dev->tx_skb);
 470         if (!netif_device_present(dev->netdev))
 471                 return;
 472         if (status)
 473                 dev_info(&urb->dev->dev, "%s: Tx status %d\n",
 474                          dev->netdev->name, status);
 475         netif_trans_update(dev->netdev);
 476         netif_wake_queue(dev->netdev);
 477 }
 478
 479 static void intr_callback(struct urb *urb)
 480 {
 481         rtl8150_t *dev;
 482         __u8 *d;
 483         int status = urb->status;
 484         int res;
 485
 486         dev = urb->context;
 487         if (!dev)
 488                 return;
 489         switch (status) {
 490         case 0:                 /* success */
 491                 break;
 492         case -ECONNRESET:       /* unlink */
 493         case -ENOENT:
 494         case -ESHUTDOWN:
 495                 return;
 496         /* -EPIPE:  should clear the halt */
 497         default:
 498                 dev_info(&urb->dev->dev, "%s: intr status %d\n",
 499                          dev->netdev->name, status);
 500                 goto resubmit;
 501         }
 502
 503         d = urb->transfer_buffer;
 504         if (d[0] & TSR_ERRORS) {
 505                 dev->netdev->stats.tx_errors++;
 506                 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
 507                         dev->netdev->stats.tx_aborted_errors++;
 508                 if (d[INT_TSR] & TSR_LCOL)
 509                         dev->netdev->stats.tx_window_errors++;
 510                 if (d[INT_TSR] & TSR_LOSS_CRS)
 511                         dev->netdev->stats.tx_carrier_errors++;
 512         }
 513         /* Report link status changes to the network stack */
 514         if ((d[INT_MSR] & MSR_LINK) == 0) {
 515                 if (netif_carrier_ok(dev->netdev)) {
 516                         netif_carrier_off(dev->netdev);
 517                         netdev_dbg(dev->netdev, "%s: LINK LOST\n", __func__);
 518                 }
 519         } else {
 520                 if (!netif_carrier_ok(dev->netdev)) {
 521                         netif_carrier_on(dev->netdev);
 522                         netdev_dbg(dev->netdev, "%s: LINK CAME BACK\n", __func__);
 523                 }
 524         }
 525
 526 resubmit:
 527         res = usb_submit_urb (urb, GFP_ATOMIC);
 528         if (res == -ENODEV)
 529                 netif_device_detach(dev->netdev);
 530         else if (res)
 531                 dev_err(&dev->udev->dev,
 532                         "can't resubmit intr, %s-%s/input0, status %d\n",
 533                         dev->udev->bus->bus_name, dev->udev->devpath, res);
 534 }
 535
 536 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
 537 {
 538         rtl8150_t *dev = usb_get_intfdata(intf);
 539
 540         netif_device_detach(dev->netdev);
 541
 542         if (netif_running(dev->netdev)) {
 543                 usb_kill_urb(dev->rx_urb);
 544                 usb_kill_urb(dev->intr_urb);
 545         }
 546         return 0;
 547 }
 548
 549 static int rtl8150_resume(struct usb_interface *intf)
 550 {
 551         rtl8150_t *dev = usb_get_intfdata(intf);
 552
 553         netif_device_attach(dev->netdev);
 554         if (netif_running(dev->netdev)) {
 555                 dev->rx_urb->status = 0;
 556                 dev->rx_urb->actual_length = 0;
 557                 read_bulk_callback(dev->rx_urb);
 558
 559                 dev->intr_urb->status = 0;
 560                 dev->intr_urb->actual_length = 0;
 561                 intr_callback(dev->intr_urb);
 562         }
 563         return 0;
 564 }
 565
 566 /*
 567 **
 568 **      network related part of the code
 569 **
 570 */
 571
 572 static void fill_skb_pool(rtl8150_t *dev)
 573 {
 574         struct sk_buff *skb;
 575         int i;
 576
 577         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 578                 if (dev->rx_skb_pool[i])
 579                         continue;
 580                 skb = dev_alloc_skb(RTL8150_MTU + 2);
 581                 if (!skb) {
 582                         return;
 583                 }
 584                 skb_reserve(skb, 2);
 585                 dev->rx_skb_pool[i] = skb;
 586         }
 587 }
 588
 589 static void free_skb_pool(rtl8150_t *dev)
 590 {
 591         int i;
 592
 593         for (i = 0; i < RX_SKB_POOL_SIZE; i++)
 594                 if (dev->rx_skb_pool[i])
 595                         dev_kfree_skb(dev->rx_skb_pool[i]);
 596 }
 597
 598 static void rx_fixup(unsigned long data)
 599 {
 600         struct rtl8150 *dev = (struct rtl8150 *)data;
 601         struct sk_buff *skb;
 602         int status;
 603
 604         spin_lock_irq(&dev->rx_pool_lock);
 605         fill_skb_pool(dev);
 606         spin_unlock_irq(&dev->rx_pool_lock);
 607         if (test_bit(RX_URB_FAIL, &dev->flags))
 608                 if (dev->rx_skb)
 609                         goto try_again;
 610         spin_lock_irq(&dev->rx_pool_lock);
 611         skb = pull_skb(dev);
 612         spin_unlock_irq(&dev->rx_pool_lock);
 613         if (skb == NULL)
 614                 goto tlsched;
 615         dev->rx_skb = skb;
 616         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 617                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 618 try_again:
 619         status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
 620         if (status == -ENODEV) {
 621                 netif_device_detach(dev->netdev);
 622         } else if (status) {
 623                 set_bit(RX_URB_FAIL, &dev->flags);
 624                 goto tlsched;
 625         } else {
 626                 clear_bit(RX_URB_FAIL, &dev->flags);
 627         }
 628
 629         return;
 630 tlsched:
 631         tasklet_schedule(&dev->tl);
 632 }
 633
 634 static int enable_net_traffic(rtl8150_t * dev)
 635 {
 636         u8 cr, tcr, rcr, msr;
 637
 638         if (!rtl8150_reset(dev)) {
 639                 dev_warn(&dev->udev->dev, "device reset failed\n");
 640         }
 641         /* RCR bit7=1 attach Rx info at the end;  =0 HW CRC (which is broken) */
 642         rcr = 0x9e;
 643         tcr = 0xd8;
 644         cr = 0x0c;
 645         if (!(rcr & 0x80))
 646                 set_bit(RTL8150_HW_CRC, &dev->flags);
 647         set_registers(dev, RCR, 1, &rcr);
 648         set_registers(dev, TCR, 1, &tcr);
 649         set_registers(dev, CR, 1, &cr);
 650         get_registers(dev, MSR, 1, &msr);
 651
 652         return 0;
 653 }
 654
 655 static void disable_net_traffic(rtl8150_t * dev)
 656 {
 657         u8 cr;
 658
 659         get_registers(dev, CR, 1, &cr);
 660         cr &= 0xf3;
 661         set_registers(dev, CR, 1, &cr);
 662 }
 663
 664 static void rtl8150_tx_timeout(struct net_device *netdev)
 665 {
 666         rtl8150_t *dev = netdev_priv(netdev);
 667         dev_warn(&netdev->dev, "Tx timeout.\n");
 668         usb_unlink_urb(dev->tx_urb);
 669         netdev->stats.tx_errors++;
 670 }
 671
 672 static void rtl8150_set_multicast(struct net_device *netdev)
 673 {
 674         rtl8150_t *dev = netdev_priv(netdev);
 675         u16 rx_creg = 0x9e;
 676
 677         netif_stop_queue(netdev);
 678         if (netdev->flags & IFF_PROMISC) {
 679                 rx_creg |= 0x0001;
 680                 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
 681         } else if (!netdev_mc_empty(netdev) ||
 682                    (netdev->flags & IFF_ALLMULTI)) {
 683                 rx_creg &= 0xfffe;
 684                 rx_creg |= 0x0002;
 685                 dev_dbg(&netdev->dev, "%s: allmulti set\n", netdev->name);
 686         } else {
 687                 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
 688                 rx_creg &= 0x00fc;
 689         }
 690         async_set_registers(dev, RCR, sizeof(rx_creg), rx_creg);
 691         netif_wake_queue(netdev);
 692 }
 693
 694 static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb,
 695                                             struct net_device *netdev)
 696 {
 697         rtl8150_t *dev = netdev_priv(netdev);
 698         int count, res;
 699
 700         netif_stop_queue(netdev);
 701         count = (skb->len < 60) ? 60 : skb->len;
 702         count = (count & 0x3f) ? count : count + 1;
 703         dev->tx_skb = skb;
 704         usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
 705                       skb->data, count, write_bulk_callback, dev);
 706         if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
 707                 /* Can we get/handle EPIPE here? */
 708                 if (res == -ENODEV)
 709                         netif_device_detach(dev->netdev);
 710                 else {
 711                         dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
 712                         netdev->stats.tx_errors++;
 713                         netif_start_queue(netdev);
 714                 }
 715         } else {
 716                 netdev->stats.tx_packets++;
 717                 netdev->stats.tx_bytes += skb->len;
 718                 netif_trans_update(netdev);
 719         }
 720
 721         return NETDEV_TX_OK;
 722 }
 723
 724
 725 static void set_carrier(struct net_device *netdev)
 726 {
 727         rtl8150_t *dev = netdev_priv(netdev);
 728         short tmp;
 729
 730         get_registers(dev, CSCR, 2, &tmp);
 731         if (tmp & CSCR_LINK_STATUS)
 732                 netif_carrier_on(netdev);
 733         else
 734                 netif_carrier_off(netdev);
 735 }
 736
 737 static int rtl8150_open(struct net_device *netdev)
 738 {
 739         rtl8150_t *dev = netdev_priv(netdev);
 740         int res;
 741
 742         if (dev->rx_skb == NULL)
 743                 dev->rx_skb = pull_skb(dev);
 744         if (!dev->rx_skb)
 745                 return -ENOMEM;
 746
 747         set_registers(dev, IDR, 6, netdev->dev_addr);
 748
 749         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 750                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 751         if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
 752                 if (res == -ENODEV)
 753                         netif_device_detach(dev->netdev);
 754                 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
 755                 return res;
 756         }
 757         usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
 758                      dev->intr_buff, INTBUFSIZE, intr_callback,
 759                      dev, dev->intr_interval);
 760         if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
 761                 if (res == -ENODEV)
 762                         netif_device_detach(dev->netdev);
 763                 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
 764                 usb_kill_urb(dev->rx_urb);
 765                 return res;
 766         }
 767         enable_net_traffic(dev);
 768         set_carrier(netdev);
 769         netif_start_queue(netdev);
 770
 771         return res;
 772 }
 773
 774 static int rtl8150_close(struct net_device *netdev)
 775 {
 776         rtl8150_t *dev = netdev_priv(netdev);
 777
 778         netif_stop_queue(netdev);
 779         if (!test_bit(RTL8150_UNPLUG, &dev->flags))
 780                 disable_net_traffic(dev);
 781         unlink_all_urbs(dev);
 782
 783         return 0;
 784 }
 785
 786 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
 787 {
 788         rtl8150_t *dev = netdev_priv(netdev);
 789
 790         strlcpy(info->driver, driver_name, sizeof(info->driver));
 791         strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
 792         usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info));
 793 }
 794
 795 static int rtl8150_get_link_ksettings(struct net_device *netdev,
 796                                       struct ethtool_link_ksettings *ecmd)
 797 {
 798         rtl8150_t *dev = netdev_priv(netdev);
 799         short lpa, bmcr;
 800         u32 supported;
 801
 802         supported = (SUPPORTED_10baseT_Half |
 803                           SUPPORTED_10baseT_Full |
 804                           SUPPORTED_100baseT_Half |
 805                           SUPPORTED_100baseT_Full |
 806                           SUPPORTED_Autoneg |
 807                           SUPPORTED_TP | SUPPORTED_MII);
 808         ecmd->base.port = PORT_TP;
 809         ecmd->base.phy_address = dev->phy;
 810         get_registers(dev, BMCR, 2, &bmcr);
 811         get_registers(dev, ANLP, 2, &lpa);
 812         if (bmcr & BMCR_ANENABLE) {
 813                 u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ?
 814                              SPEED_100 : SPEED_10);
 815                 ecmd->base.speed = speed;
 816                 ecmd->base.autoneg = AUTONEG_ENABLE;
 817                 if (speed == SPEED_100)
 818                         ecmd->base.duplex = (lpa & LPA_100FULL) ?
 819                             DUPLEX_FULL : DUPLEX_HALF;
 820                 else
 821                         ecmd->base.duplex = (lpa & LPA_10FULL) ?
 822                             DUPLEX_FULL : DUPLEX_HALF;
 823         } else {
 824                 ecmd->base.autoneg = AUTONEG_DISABLE;
 825                 ecmd->base.speed = ((bmcr & BMCR_SPEED100) ?
 826                                              SPEED_100 : SPEED_10);
 827                 ecmd->base.duplex = (bmcr & BMCR_FULLDPLX) ?
 828                     DUPLEX_FULL : DUPLEX_HALF;
 829         }
 830
 831         ethtool_convert_legacy_u32_to_link_mode(ecmd->link_modes.supported,
 832                                                 supported);
 833
 834         return 0;
 835 }
 836
 837 static const struct ethtool_ops ops = {
 838         .get_drvinfo = rtl8150_get_drvinfo,
 839         .get_link = ethtool_op_get_link,
 840         .get_link_ksettings = rtl8150_get_link_ksettings,
 841 };
 842
 843 static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 844 {
 845         rtl8150_t *dev = netdev_priv(netdev);
 846         u16 *data = (u16 *) & rq->ifr_ifru;
 847         int res = 0;
 848
 849         switch (cmd) {
 850         case SIOCDEVPRIVATE:
 851                 data[0] = dev->phy;
 852         case SIOCDEVPRIVATE + 1:
 853                 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
 854                 break;
 855         case SIOCDEVPRIVATE + 2:
 856                 if (!capable(CAP_NET_ADMIN))
 857                         return -EPERM;
 858                 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
 859                 break;
 860         default:
 861                 res = -EOPNOTSUPP;
 862         }
 863
 864         return res;
 865 }
 866
 867 static const struct net_device_ops rtl8150_netdev_ops = {
 868         .ndo_open               = rtl8150_open,
 869         .ndo_stop               = rtl8150_close,
 870         .ndo_do_ioctl           = rtl8150_ioctl,
 871         .ndo_start_xmit         = rtl8150_start_xmit,
 872         .ndo_tx_timeout         = rtl8150_tx_timeout,
 873         .ndo_set_rx_mode        = rtl8150_set_multicast,
 874         .ndo_set_mac_address    = rtl8150_set_mac_address,
 875
 876         .ndo_validate_addr      = eth_validate_addr,
 877 };
 878
 879 static int rtl8150_probe(struct usb_interface *intf,
 880                          const struct usb_device_id *id)
 881 {
 882         struct usb_device *udev = interface_to_usbdev(intf);
 883         rtl8150_t *dev;
 884         struct net_device *netdev;
 885
 886         netdev = alloc_etherdev(sizeof(rtl8150_t));
 887         if (!netdev)
 888                 return -ENOMEM;
 889
 890         dev = netdev_priv(netdev);
 891
 892         dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
 893         if (!dev->intr_buff) {
 894                 free_netdev(netdev);
 895                 return -ENOMEM;
 896         }
 897
 898         tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
 899         spin_lock_init(&dev->rx_pool_lock);
 900
 901         dev->udev = udev;
 902         dev->netdev = netdev;
 903         netdev->netdev_ops = &rtl8150_netdev_ops;
 904         netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
 905         netdev->ethtool_ops = &ops;
 906         dev->intr_interval = 100;       /* 100ms */
 907
 908         if (!alloc_all_urbs(dev)) {
 909                 dev_err(&intf->dev, "out of memory\n");
 910                 goto out;
 911         }
 912         if (!rtl8150_reset(dev)) {
 913                 dev_err(&intf->dev, "couldn't reset the device\n");
 914                 goto out1;
 915         }
 916         fill_skb_pool(dev);
 917         set_ethernet_addr(dev);
 918
 919         usb_set_intfdata(intf, dev);
 920         SET_NETDEV_DEV(netdev, &intf->dev);
 921         if (register_netdev(netdev) != 0) {
 922                 dev_err(&intf->dev, "couldn't register the device\n");
 923                 goto out2;
 924         }
 925
 926         dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
 927
 928         return 0;
 929
 930 out2:
 931         usb_set_intfdata(intf, NULL);
 932         free_skb_pool(dev);
 933 out1:
 934         free_all_urbs(dev);
 935 out:
 936         kfree(dev->intr_buff);
 937         free_netdev(netdev);
 938         return -EIO;
 939 }
 940
 941 static void rtl8150_disconnect(struct usb_interface *intf)
 942 {
 943         rtl8150_t *dev = usb_get_intfdata(intf);
 944
 945         usb_set_intfdata(intf, NULL);
 946         if (dev) {
 947                 set_bit(RTL8150_UNPLUG, &dev->flags);
 948                 tasklet_kill(&dev->tl);
 949                 unregister_netdev(dev->netdev);
 950                 unlink_all_urbs(dev);
 951                 free_all_urbs(dev);
 952                 free_skb_pool(dev);
 953                 if (dev->rx_skb)
 954                         dev_kfree_skb(dev->rx_skb);
 955                 kfree(dev->intr_buff);
 956                 free_netdev(dev->netdev);
 957         }
 958 }
 959
 960 static struct usb_driver rtl8150_driver = {
 961         .name           = driver_name,
 962         .probe          = rtl8150_probe,
 963         .disconnect     = rtl8150_disconnect,
 964         .id_table       = rtl8150_table,
 965         .suspend        = rtl8150_suspend,
 966         .resume         = rtl8150_resume,
 967         .disable_hub_initiated_lpm = 1,
 968 };
 969
 970 module_usb_driver(rtl8150_driver);
 971
 972 MODULE_AUTHOR(DRIVER_AUTHOR);
 973 MODULE_DESCRIPTION(DRIVER_DESC);
 974 MODULE_LICENSE("GPL");