drivers/net/usb/rtl8150.c

   1 /*
   2  *  Copyright (c) 2002 Petko Manolov (petkan@users.sourceforge.net)
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * version 2 as published by the Free Software Foundation.
   7  */
   8
   9 #include <linux/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 <asm/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 */
 115 static 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 void set_ethernet_addr(rtl8150_t *dev)
 281 {
 282         u8 node_id[ETH_ALEN];
 283         int ret;
 284
 285         ret = get_registers(dev, IDR, sizeof(node_id), node_id);
 286
 287         if (ret == sizeof(node_id)) {
 288                 ether_addr_copy(dev->netdev->dev_addr, node_id);
 289         } else {
 290                 eth_hw_addr_random(dev->netdev);
 291                 netdev_notice(dev->netdev, "Assigned a random MAC address: %pM\n",
 292                               dev->netdev->dev_addr);
 293         }
 294 }
 295
 296 static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
 297 {
 298         struct sockaddr *addr = p;
 299         rtl8150_t *dev = netdev_priv(netdev);
 300
 301         if (netif_running(netdev))
 302                 return -EBUSY;
 303
 304         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 305         netdev_dbg(netdev, "Setting MAC address to %pM\n", netdev->dev_addr);
 306         /* Set the IDR registers. */
 307         set_registers(dev, IDR, netdev->addr_len, netdev->dev_addr);
 308 #ifdef EEPROM_WRITE
 309         {
 310         int i;
 311         u8 cr;
 312         /* Get the CR contents. */
 313         get_registers(dev, CR, 1, &cr);
 314         /* Set the WEPROM bit (eeprom write enable). */
 315         cr |= 0x20;
 316         set_registers(dev, CR, 1, &cr);
 317         /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
 318            so we need to split them up. */
 319         for (i = 0; i * 2 < netdev->addr_len; i++) {
 320                 set_registers(dev, IDR_EEPROM + (i * 2), 2,
 321                 netdev->dev_addr + (i * 2));
 322         }
 323         /* Clear the WEPROM bit (preventing accidental eeprom writes). */
 324         cr &= 0xdf;
 325         set_registers(dev, CR, 1, &cr);
 326         }
 327 #endif
 328         return 0;
 329 }
 330
 331 static int rtl8150_reset(rtl8150_t * dev)
 332 {
 333         u8 data = 0x10;
 334         int i = HZ;
 335
 336         set_registers(dev, CR, 1, &data);
 337         do {
 338                 get_registers(dev, CR, 1, &data);
 339         } while ((data & 0x10) && --i);
 340
 341         return (i > 0) ? 1 : 0;
 342 }
 343
 344 static int alloc_all_urbs(rtl8150_t * dev)
 345 {
 346         dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 347         if (!dev->rx_urb)
 348                 return 0;
 349         dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 350         if (!dev->tx_urb) {
 351                 usb_free_urb(dev->rx_urb);
 352                 return 0;
 353         }
 354         dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
 355         if (!dev->intr_urb) {
 356                 usb_free_urb(dev->rx_urb);
 357                 usb_free_urb(dev->tx_urb);
 358                 return 0;
 359         }
 360
 361         return 1;
 362 }
 363
 364 static void free_all_urbs(rtl8150_t * dev)
 365 {
 366         usb_free_urb(dev->rx_urb);
 367         usb_free_urb(dev->tx_urb);
 368         usb_free_urb(dev->intr_urb);
 369 }
 370
 371 static void unlink_all_urbs(rtl8150_t * dev)
 372 {
 373         usb_kill_urb(dev->rx_urb);
 374         usb_kill_urb(dev->tx_urb);
 375         usb_kill_urb(dev->intr_urb);
 376 }
 377
 378 static inline struct sk_buff *pull_skb(rtl8150_t *dev)
 379 {
 380         struct sk_buff *skb;
 381         int i;
 382
 383         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 384                 if (dev->rx_skb_pool[i]) {
 385                         skb = dev->rx_skb_pool[i];
 386                         dev->rx_skb_pool[i] = NULL;
 387                         return skb;
 388                 }
 389         }
 390         return NULL;
 391 }
 392
 393 static void read_bulk_callback(struct urb *urb)
 394 {
 395         rtl8150_t *dev;
 396         unsigned pkt_len, res;
 397         struct sk_buff *skb;
 398         struct net_device *netdev;
 399         u16 rx_stat;
 400         int status = urb->status;
 401         int result;
 402
 403         dev = urb->context;
 404         if (!dev)
 405                 return;
 406         if (test_bit(RTL8150_UNPLUG, &dev->flags))
 407                 return;
 408         netdev = dev->netdev;
 409         if (!netif_device_present(netdev))
 410                 return;
 411
 412         switch (status) {
 413         case 0:
 414                 break;
 415         case -ENOENT:
 416                 return; /* the urb is in unlink state */
 417         case -ETIME:
 418                 if (printk_ratelimit())
 419                         dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
 420                 goto goon;
 421         default:
 422                 if (printk_ratelimit())
 423                         dev_warn(&urb->dev->dev, "Rx status %d\n", status);
 424                 goto goon;
 425         }
 426
 427         if (!dev->rx_skb)
 428                 goto resched;
 429         /* protect against short packets (tell me why we got some?!?) */
 430         if (urb->actual_length < 4)
 431                 goto goon;
 432
 433         res = urb->actual_length;
 434         rx_stat = le16_to_cpu(*(__le16 *)(urb->transfer_buffer + res - 4));
 435         pkt_len = res - 4;
 436
 437         skb_put(dev->rx_skb, pkt_len);
 438         dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
 439         netif_rx(dev->rx_skb);
 440         netdev->stats.rx_packets++;
 441         netdev->stats.rx_bytes += pkt_len;
 442
 443         spin_lock(&dev->rx_pool_lock);
 444         skb = pull_skb(dev);
 445         spin_unlock(&dev->rx_pool_lock);
 446         if (!skb)
 447                 goto resched;
 448
 449         dev->rx_skb = skb;
 450 goon:
 451         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 452                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 453         result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
 454         if (result == -ENODEV)
 455                 netif_device_detach(dev->netdev);
 456         else if (result) {
 457                 set_bit(RX_URB_FAIL, &dev->flags);
 458                 goto resched;
 459         } else {
 460                 clear_bit(RX_URB_FAIL, &dev->flags);
 461         }
 462
 463         return;
 464 resched:
 465         tasklet_schedule(&dev->tl);
 466 }
 467
 468 static void write_bulk_callback(struct urb *urb)
 469 {
 470         rtl8150_t *dev;
 471         int status = urb->status;
 472
 473         dev = urb->context;
 474         if (!dev)
 475                 return;
 476         dev_kfree_skb_irq(dev->tx_skb);
 477         if (!netif_device_present(dev->netdev))
 478                 return;
 479         if (status)
 480                 dev_info(&urb->dev->dev, "%s: Tx status %d\n",
 481                          dev->netdev->name, status);
 482         netif_trans_update(dev->netdev);
 483         netif_wake_queue(dev->netdev);
 484 }
 485
 486 static void intr_callback(struct urb *urb)
 487 {
 488         rtl8150_t *dev;
 489         __u8 *d;
 490         int status = urb->status;
 491         int res;
 492
 493         dev = urb->context;
 494         if (!dev)
 495                 return;
 496         switch (status) {
 497         case 0:                 /* success */
 498                 break;
 499         case -ECONNRESET:       /* unlink */
 500         case -ENOENT:
 501         case -ESHUTDOWN:
 502                 return;
 503         /* -EPIPE:  should clear the halt */
 504         default:
 505                 dev_info(&urb->dev->dev, "%s: intr status %d\n",
 506                          dev->netdev->name, status);
 507                 goto resubmit;
 508         }
 509
 510         d = urb->transfer_buffer;
 511         if (d[0] & TSR_ERRORS) {
 512                 dev->netdev->stats.tx_errors++;
 513                 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
 514                         dev->netdev->stats.tx_aborted_errors++;
 515                 if (d[INT_TSR] & TSR_LCOL)
 516                         dev->netdev->stats.tx_window_errors++;
 517                 if (d[INT_TSR] & TSR_LOSS_CRS)
 518                         dev->netdev->stats.tx_carrier_errors++;
 519         }
 520         /* Report link status changes to the network stack */
 521         if ((d[INT_MSR] & MSR_LINK) == 0) {
 522                 if (netif_carrier_ok(dev->netdev)) {
 523                         netif_carrier_off(dev->netdev);
 524                         netdev_dbg(dev->netdev, "%s: LINK LOST\n", __func__);
 525                 }
 526         } else {
 527                 if (!netif_carrier_ok(dev->netdev)) {
 528                         netif_carrier_on(dev->netdev);
 529                         netdev_dbg(dev->netdev, "%s: LINK CAME BACK\n", __func__);
 530                 }
 531         }
 532
 533 resubmit:
 534         res = usb_submit_urb (urb, GFP_ATOMIC);
 535         if (res == -ENODEV)
 536                 netif_device_detach(dev->netdev);
 537         else if (res)
 538                 dev_err(&dev->udev->dev,
 539                         "can't resubmit intr, %s-%s/input0, status %d\n",
 540                         dev->udev->bus->bus_name, dev->udev->devpath, res);
 541 }
 542
 543 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
 544 {
 545         rtl8150_t *dev = usb_get_intfdata(intf);
 546
 547         netif_device_detach(dev->netdev);
 548
 549         if (netif_running(dev->netdev)) {
 550                 usb_kill_urb(dev->rx_urb);
 551                 usb_kill_urb(dev->intr_urb);
 552         }
 553         return 0;
 554 }
 555
 556 static int rtl8150_resume(struct usb_interface *intf)
 557 {
 558         rtl8150_t *dev = usb_get_intfdata(intf);
 559
 560         netif_device_attach(dev->netdev);
 561         if (netif_running(dev->netdev)) {
 562                 dev->rx_urb->status = 0;
 563                 dev->rx_urb->actual_length = 0;
 564                 read_bulk_callback(dev->rx_urb);
 565
 566                 dev->intr_urb->status = 0;
 567                 dev->intr_urb->actual_length = 0;
 568                 intr_callback(dev->intr_urb);
 569         }
 570         return 0;
 571 }
 572
 573 /*
 574 **
 575 **      network related part of the code
 576 **
 577 */
 578
 579 static void fill_skb_pool(rtl8150_t *dev)
 580 {
 581         struct sk_buff *skb;
 582         int i;
 583
 584         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 585                 if (dev->rx_skb_pool[i])
 586                         continue;
 587                 skb = dev_alloc_skb(RTL8150_MTU + 2);
 588                 if (!skb) {
 589                         return;
 590                 }
 591                 skb_reserve(skb, 2);
 592                 dev->rx_skb_pool[i] = skb;
 593         }
 594 }
 595
 596 static void free_skb_pool(rtl8150_t *dev)
 597 {
 598         int i;
 599
 600         for (i = 0; i < RX_SKB_POOL_SIZE; i++)
 601                 if (dev->rx_skb_pool[i])
 602                         dev_kfree_skb(dev->rx_skb_pool[i]);
 603 }
 604
 605 static void rx_fixup(unsigned long data)
 606 {
 607         struct rtl8150 *dev = (struct rtl8150 *)data;
 608         struct sk_buff *skb;
 609         int status;
 610
 611         spin_lock_irq(&dev->rx_pool_lock);
 612         fill_skb_pool(dev);
 613         spin_unlock_irq(&dev->rx_pool_lock);
 614         if (test_bit(RX_URB_FAIL, &dev->flags))
 615                 if (dev->rx_skb)
 616                         goto try_again;
 617         spin_lock_irq(&dev->rx_pool_lock);
 618         skb = pull_skb(dev);
 619         spin_unlock_irq(&dev->rx_pool_lock);
 620         if (skb == NULL)
 621                 goto tlsched;
 622         dev->rx_skb = skb;
 623         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 624                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 625 try_again:
 626         status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
 627         if (status == -ENODEV) {
 628                 netif_device_detach(dev->netdev);
 629         } else if (status) {
 630                 set_bit(RX_URB_FAIL, &dev->flags);
 631                 goto tlsched;
 632         } else {
 633                 clear_bit(RX_URB_FAIL, &dev->flags);
 634         }
 635
 636         return;
 637 tlsched:
 638         tasklet_schedule(&dev->tl);
 639 }
 640
 641 static int enable_net_traffic(rtl8150_t * dev)
 642 {
 643         u8 cr, tcr, rcr, msr;
 644
 645         if (!rtl8150_reset(dev)) {
 646                 dev_warn(&dev->udev->dev, "device reset failed\n");
 647         }
 648         /* RCR bit7=1 attach Rx info at the end;  =0 HW CRC (which is broken) */
 649         rcr = 0x9e;
 650         tcr = 0xd8;
 651         cr = 0x0c;
 652         if (!(rcr & 0x80))
 653                 set_bit(RTL8150_HW_CRC, &dev->flags);
 654         set_registers(dev, RCR, 1, &rcr);
 655         set_registers(dev, TCR, 1, &tcr);
 656         set_registers(dev, CR, 1, &cr);
 657         get_registers(dev, MSR, 1, &msr);
 658
 659         return 0;
 660 }
 661
 662 static void disable_net_traffic(rtl8150_t * dev)
 663 {
 664         u8 cr;
 665
 666         get_registers(dev, CR, 1, &cr);
 667         cr &= 0xf3;
 668         set_registers(dev, CR, 1, &cr);
 669 }
 670
 671 static void rtl8150_tx_timeout(struct net_device *netdev)
 672 {
 673         rtl8150_t *dev = netdev_priv(netdev);
 674         dev_warn(&netdev->dev, "Tx timeout.\n");
 675         usb_unlink_urb(dev->tx_urb);
 676         netdev->stats.tx_errors++;
 677 }
 678
 679 static void rtl8150_set_multicast(struct net_device *netdev)
 680 {
 681         rtl8150_t *dev = netdev_priv(netdev);
 682         u16 rx_creg = 0x9e;
 683
 684         netif_stop_queue(netdev);
 685         if (netdev->flags & IFF_PROMISC) {
 686                 rx_creg |= 0x0001;
 687                 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
 688         } else if (!netdev_mc_empty(netdev) ||
 689                    (netdev->flags & IFF_ALLMULTI)) {
 690                 rx_creg &= 0xfffe;
 691                 rx_creg |= 0x0002;
 692                 dev_dbg(&netdev->dev, "%s: allmulti set\n", netdev->name);
 693         } else {
 694                 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
 695                 rx_creg &= 0x00fc;
 696         }
 697         async_set_registers(dev, RCR, sizeof(rx_creg), rx_creg);
 698         netif_wake_queue(netdev);
 699 }
 700
 701 static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb,
 702                                             struct net_device *netdev)
 703 {
 704         rtl8150_t *dev = netdev_priv(netdev);
 705         int count, res;
 706
 707         netif_stop_queue(netdev);
 708         count = (skb->len < 60) ? 60 : skb->len;
 709         count = (count & 0x3f) ? count : count + 1;
 710         dev->tx_skb = skb;
 711         usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
 712                       skb->data, count, write_bulk_callback, dev);
 713         if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
 714                 /* Can we get/handle EPIPE here? */
 715                 if (res == -ENODEV)
 716                         netif_device_detach(dev->netdev);
 717                 else {
 718                         dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
 719                         netdev->stats.tx_errors++;
 720                         netif_start_queue(netdev);
 721                 }
 722         } else {
 723                 netdev->stats.tx_packets++;
 724                 netdev->stats.tx_bytes += skb->len;
 725                 netif_trans_update(netdev);
 726         }
 727
 728         return NETDEV_TX_OK;
 729 }
 730
 731
 732 static void set_carrier(struct net_device *netdev)
 733 {
 734         rtl8150_t *dev = netdev_priv(netdev);
 735         short tmp;
 736
 737         get_registers(dev, CSCR, 2, &tmp);
 738         if (tmp & CSCR_LINK_STATUS)
 739                 netif_carrier_on(netdev);
 740         else
 741                 netif_carrier_off(netdev);
 742 }
 743
 744 static int rtl8150_open(struct net_device *netdev)
 745 {
 746         rtl8150_t *dev = netdev_priv(netdev);
 747         int res;
 748
 749         if (dev->rx_skb == NULL)
 750                 dev->rx_skb = pull_skb(dev);
 751         if (!dev->rx_skb)
 752                 return -ENOMEM;
 753
 754         set_registers(dev, IDR, 6, netdev->dev_addr);
 755
 756         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 757                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 758         if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
 759                 if (res == -ENODEV)
 760                         netif_device_detach(dev->netdev);
 761                 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
 762                 return res;
 763         }
 764         usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
 765                      dev->intr_buff, INTBUFSIZE, intr_callback,
 766                      dev, dev->intr_interval);
 767         if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
 768                 if (res == -ENODEV)
 769                         netif_device_detach(dev->netdev);
 770                 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
 771                 usb_kill_urb(dev->rx_urb);
 772                 return res;
 773         }
 774         enable_net_traffic(dev);
 775         set_carrier(netdev);
 776         netif_start_queue(netdev);
 777
 778         return res;
 779 }
 780
 781 static int rtl8150_close(struct net_device *netdev)
 782 {
 783         rtl8150_t *dev = netdev_priv(netdev);
 784
 785         netif_stop_queue(netdev);
 786         if (!test_bit(RTL8150_UNPLUG, &dev->flags))
 787                 disable_net_traffic(dev);
 788         unlink_all_urbs(dev);
 789
 790         return 0;
 791 }
 792
 793 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
 794 {
 795         rtl8150_t *dev = netdev_priv(netdev);
 796
 797         strlcpy(info->driver, driver_name, sizeof(info->driver));
 798         strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
 799         usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info));
 800 }
 801
 802 static int rtl8150_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
 803 {
 804         rtl8150_t *dev = netdev_priv(netdev);
 805         short lpa, bmcr;
 806
 807         ecmd->supported = (SUPPORTED_10baseT_Half |
 808                           SUPPORTED_10baseT_Full |
 809                           SUPPORTED_100baseT_Half |
 810                           SUPPORTED_100baseT_Full |
 811                           SUPPORTED_Autoneg |
 812                           SUPPORTED_TP | SUPPORTED_MII);
 813         ecmd->port = PORT_TP;
 814         ecmd->transceiver = XCVR_INTERNAL;
 815         ecmd->phy_address = dev->phy;
 816         get_registers(dev, BMCR, 2, &bmcr);
 817         get_registers(dev, ANLP, 2, &lpa);
 818         if (bmcr & BMCR_ANENABLE) {
 819                 u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ?
 820                              SPEED_100 : SPEED_10);
 821                 ethtool_cmd_speed_set(ecmd, speed);
 822                 ecmd->autoneg = AUTONEG_ENABLE;
 823                 if (speed == SPEED_100)
 824                         ecmd->duplex = (lpa & LPA_100FULL) ?
 825                             DUPLEX_FULL : DUPLEX_HALF;
 826                 else
 827                         ecmd->duplex = (lpa & LPA_10FULL) ?
 828                             DUPLEX_FULL : DUPLEX_HALF;
 829         } else {
 830                 ecmd->autoneg = AUTONEG_DISABLE;
 831                 ethtool_cmd_speed_set(ecmd, ((bmcr & BMCR_SPEED100) ?
 832                                              SPEED_100 : SPEED_10));
 833                 ecmd->duplex = (bmcr & BMCR_FULLDPLX) ?
 834                     DUPLEX_FULL : DUPLEX_HALF;
 835         }
 836         return 0;
 837 }
 838
 839 static const struct ethtool_ops ops = {
 840         .get_drvinfo = rtl8150_get_drvinfo,
 841         .get_settings = rtl8150_get_settings,
 842         .get_link = ethtool_op_get_link
 843 };
 844
 845 static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 846 {
 847         rtl8150_t *dev = netdev_priv(netdev);
 848         u16 *data = (u16 *) & rq->ifr_ifru;
 849         int res = 0;
 850
 851         switch (cmd) {
 852         case SIOCDEVPRIVATE:
 853                 data[0] = dev->phy;
 854         case SIOCDEVPRIVATE + 1:
 855                 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
 856                 break;
 857         case SIOCDEVPRIVATE + 2:
 858                 if (!capable(CAP_NET_ADMIN))
 859                         return -EPERM;
 860                 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
 861                 break;
 862         default:
 863                 res = -EOPNOTSUPP;
 864         }
 865
 866         return res;
 867 }
 868
 869 static const struct net_device_ops rtl8150_netdev_ops = {
 870         .ndo_open               = rtl8150_open,
 871         .ndo_stop               = rtl8150_close,
 872         .ndo_do_ioctl           = rtl8150_ioctl,
 873         .ndo_start_xmit         = rtl8150_start_xmit,
 874         .ndo_tx_timeout         = rtl8150_tx_timeout,
 875         .ndo_set_rx_mode        = rtl8150_set_multicast,
 876         .ndo_set_mac_address    = rtl8150_set_mac_address,
 877
 878         .ndo_change_mtu         = eth_change_mtu,
 879         .ndo_validate_addr      = eth_validate_addr,
 880 };
 881
 882 static int rtl8150_probe(struct usb_interface *intf,
 883                          const struct usb_device_id *id)
 884 {
 885         struct usb_device *udev = interface_to_usbdev(intf);
 886         rtl8150_t *dev;
 887         struct net_device *netdev;
 888
 889         netdev = alloc_etherdev(sizeof(rtl8150_t));
 890         if (!netdev)
 891                 return -ENOMEM;
 892
 893         dev = netdev_priv(netdev);
 894
 895         dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
 896         if (!dev->intr_buff) {
 897                 free_netdev(netdev);
 898                 return -ENOMEM;
 899         }
 900
 901         tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
 902         spin_lock_init(&dev->rx_pool_lock);
 903
 904         dev->udev = udev;
 905         dev->netdev = netdev;
 906         netdev->netdev_ops = &rtl8150_netdev_ops;
 907         netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
 908         netdev->ethtool_ops = &ops;
 909         dev->intr_interval = 100;       /* 100ms */
 910
 911         if (!alloc_all_urbs(dev)) {
 912                 dev_err(&intf->dev, "out of memory\n");
 913                 goto out;
 914         }
 915         if (!rtl8150_reset(dev)) {
 916                 dev_err(&intf->dev, "couldn't reset the device\n");
 917                 goto out1;
 918         }
 919         fill_skb_pool(dev);
 920         set_ethernet_addr(dev);
 921
 922         usb_set_intfdata(intf, dev);
 923         SET_NETDEV_DEV(netdev, &intf->dev);
 924         if (register_netdev(netdev) != 0) {
 925                 dev_err(&intf->dev, "couldn't register the device\n");
 926                 goto out2;
 927         }
 928
 929         dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
 930
 931         return 0;
 932
 933 out2:
 934         usb_set_intfdata(intf, NULL);
 935         free_skb_pool(dev);
 936 out1:
 937         free_all_urbs(dev);
 938 out:
 939         kfree(dev->intr_buff);
 940         free_netdev(netdev);
 941         return -EIO;
 942 }
 943
 944 static void rtl8150_disconnect(struct usb_interface *intf)
 945 {
 946         rtl8150_t *dev = usb_get_intfdata(intf);
 947
 948         usb_set_intfdata(intf, NULL);
 949         if (dev) {
 950                 set_bit(RTL8150_UNPLUG, &dev->flags);
 951                 tasklet_kill(&dev->tl);
 952                 unregister_netdev(dev->netdev);
 953                 unlink_all_urbs(dev);
 954                 free_all_urbs(dev);
 955                 free_skb_pool(dev);
 956                 if (dev->rx_skb)
 957                         dev_kfree_skb(dev->rx_skb);
 958                 kfree(dev->intr_buff);
 959                 free_netdev(dev->netdev);
 960         }
 961 }
 962
 963 static struct usb_driver rtl8150_driver = {
 964         .name           = driver_name,
 965         .probe          = rtl8150_probe,
 966         .disconnect     = rtl8150_disconnect,
 967         .id_table       = rtl8150_table,
 968         .suspend        = rtl8150_suspend,
 969         .resume         = rtl8150_resume,
 970         .disable_hub_initiated_lpm = 1,
 971 };
 972
 973 module_usb_driver(rtl8150_driver);
 974
 975 MODULE_AUTHOR(DRIVER_AUTHOR);
 976 MODULE_DESCRIPTION(DRIVER_DESC);
 977 MODULE_LICENSE("GPL");