drivers/usb/net/rtl8150.c

   1 /*
   2  *  Copyright (c) 2002 Petko Manolov (petkan@users.sourceforge.net)
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * version 2 as published by the Free Software Foundation.
   7  */
   8
   9 #include <linux/init.h>
  10 #include <linux/signal.h>
  11 #include <linux/slab.h>
  12 #include <linux/module.h>
  13 #include <linux/netdevice.h>
  14 #include <linux/etherdevice.h>
  15 #include <linux/mii.h>
  16 #include <linux/ethtool.h>
  17 #include <linux/usb.h>
  18 #include <asm/uaccess.h>
  19
  20 /* Version Information */
  21 #define DRIVER_VERSION "v0.6.2 (2004/08/27)"
  22 #define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>"
  23 #define DRIVER_DESC "rtl8150 based usb-ethernet driver"
  24
  25 #define IDR                     0x0120
  26 #define MAR                     0x0126
  27 #define CR                      0x012e
  28 #define TCR                     0x012f
  29 #define RCR                     0x0130
  30 #define TSR                     0x0132
  31 #define RSR                     0x0133
  32 #define CON0                    0x0135
  33 #define CON1                    0x0136
  34 #define MSR                     0x0137
  35 #define PHYADD                  0x0138
  36 #define PHYDAT                  0x0139
  37 #define PHYCNT                  0x013b
  38 #define GPPC                    0x013d
  39 #define BMCR                    0x0140
  40 #define BMSR                    0x0142
  41 #define ANAR                    0x0144
  42 #define ANLP                    0x0146
  43 #define AER                     0x0148
  44 #define CSCR                    0x014C  /* This one has the link status */
  45 #define CSCR_LINK_STATUS        (1 << 3)
  46
  47 #define IDR_EEPROM              0x1202
  48
  49 #define PHY_READ                0
  50 #define PHY_WRITE               0x20
  51 #define PHY_GO                  0x40
  52
  53 #define MII_TIMEOUT             10
  54 #define INTBUFSIZE              8
  55
  56 #define RTL8150_REQT_READ       0xc0
  57 #define RTL8150_REQT_WRITE      0x40
  58 #define RTL8150_REQ_GET_REGS    0x05
  59 #define RTL8150_REQ_SET_REGS    0x05
  60
  61
  62 /* Transmit status register errors */
  63 #define TSR_ECOL                (1<<5)
  64 #define TSR_LCOL                (1<<4)
  65 #define TSR_LOSS_CRS            (1<<3)
  66 #define TSR_JBR                 (1<<2)
  67 #define TSR_ERRORS              (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
  68 /* Receive status register errors */
  69 #define RSR_CRC                 (1<<2)
  70 #define RSR_FAE                 (1<<1)
  71 #define RSR_ERRORS              (RSR_CRC | RSR_FAE)
  72
  73 /* Media status register definitions */
  74 #define MSR_DUPLEX              (1<<4)
  75 #define MSR_SPEED               (1<<3)
  76 #define MSR_LINK                (1<<2)
  77
  78 /* Interrupt pipe data */
  79 #define INT_TSR                 0x00
  80 #define INT_RSR                 0x01
  81 #define INT_MSR                 0x02
  82 #define INT_WAKSR               0x03
  83 #define INT_TXOK_CNT            0x04
  84 #define INT_RXLOST_CNT          0x05
  85 #define INT_CRERR_CNT           0x06
  86 #define INT_COL_CNT             0x07
  87
  88 /* Transmit status register errors */
  89 #define TSR_ECOL                (1<<5)
  90 #define TSR_LCOL                (1<<4)
  91 #define TSR_LOSS_CRS            (1<<3)
  92 #define TSR_JBR                 (1<<2)
  93 #define TSR_ERRORS              (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
  94 /* Receive status register errors */
  95 #define RSR_CRC                 (1<<2)
  96 #define RSR_FAE                 (1<<1)
  97 #define RSR_ERRORS              (RSR_CRC | RSR_FAE)
  98
  99 /* Media status register definitions */
 100 #define MSR_DUPLEX              (1<<4)
 101 #define MSR_SPEED               (1<<3)
 102 #define MSR_LINK                (1<<2)
 103
 104 /* Interrupt pipe data */
 105 #define INT_TSR                 0x00
 106 #define INT_RSR                 0x01
 107 #define INT_MSR                 0x02
 108 #define INT_WAKSR               0x03
 109 #define INT_TXOK_CNT            0x04
 110 #define INT_RXLOST_CNT          0x05
 111 #define INT_CRERR_CNT           0x06
 112 #define INT_COL_CNT             0x07
 113
 114
 115 #define RTL8150_MTU             1540
 116 #define RTL8150_TX_TIMEOUT      (HZ)
 117 #define RX_SKB_POOL_SIZE        4
 118
 119 /* rtl8150 flags */
 120 #define RTL8150_HW_CRC          0
 121 #define RX_REG_SET              1
 122 #define RTL8150_UNPLUG          2
 123 #define RX_URB_FAIL             3
 124
 125 /* Define these values to match your device */
 126 #define VENDOR_ID_REALTEK               0x0bda
 127 #define VENDOR_ID_MELCO                 0x0411
 128 #define VENDOR_ID_MICRONET              0x3980
 129 #define VENDOR_ID_LONGSHINE             0x07b8
 130 #define VENDOR_ID_OQO                   0x1557
 131 #define VENDOR_ID_ZYXEL                 0x0586
 132
 133 #define PRODUCT_ID_RTL8150              0x8150
 134 #define PRODUCT_ID_LUAKTX               0x0012
 135 #define PRODUCT_ID_LCS8138TX            0x401a
 136 #define PRODUCT_ID_SP128AR              0x0003
 137 #define PRODUCT_ID_PRESTIGE             0x401a
 138
 139 #undef  EEPROM_WRITE
 140
 141 /* table of devices that work with this driver */
 142 static struct usb_device_id rtl8150_table[] = {
 143         {USB_DEVICE(VENDOR_ID_REALTEK, PRODUCT_ID_RTL8150)},
 144         {USB_DEVICE(VENDOR_ID_MELCO, PRODUCT_ID_LUAKTX)},
 145         {USB_DEVICE(VENDOR_ID_MICRONET, PRODUCT_ID_SP128AR)},
 146         {USB_DEVICE(VENDOR_ID_LONGSHINE, PRODUCT_ID_LCS8138TX)},
 147         {USB_DEVICE(VENDOR_ID_OQO, PRODUCT_ID_RTL8150)},
 148         {USB_DEVICE(VENDOR_ID_ZYXEL, PRODUCT_ID_PRESTIGE)},
 149         {}
 150 };
 151
 152 MODULE_DEVICE_TABLE(usb, rtl8150_table);
 153
 154 struct rtl8150 {
 155         unsigned long flags;
 156         struct usb_device *udev;
 157         struct tasklet_struct tl;
 158         struct net_device_stats stats;
 159         struct net_device *netdev;
 160         struct urb *rx_urb, *tx_urb, *intr_urb, *ctrl_urb;
 161         struct sk_buff *tx_skb, *rx_skb;
 162         struct sk_buff *rx_skb_pool[RX_SKB_POOL_SIZE];
 163         spinlock_t rx_pool_lock;
 164         struct usb_ctrlrequest dr;
 165         int intr_interval;
 166         __le16 rx_creg;
 167         u8 *intr_buff;
 168         u8 phy;
 169 };
 170
 171 typedef struct rtl8150 rtl8150_t;
 172
 173 static void fill_skb_pool(rtl8150_t *);
 174 static void free_skb_pool(rtl8150_t *);
 175 static inline struct sk_buff *pull_skb(rtl8150_t *);
 176 static void rtl8150_disconnect(struct usb_interface *intf);
 177 static int rtl8150_probe(struct usb_interface *intf,
 178                            const struct usb_device_id *id);
 179 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message);
 180 static int rtl8150_resume(struct usb_interface *intf);
 181
 182 static const char driver_name [] = "rtl8150";
 183
 184 static struct usb_driver rtl8150_driver = {
 185         .name =         driver_name,
 186         .probe =        rtl8150_probe,
 187         .disconnect =   rtl8150_disconnect,
 188         .id_table =     rtl8150_table,
 189         .suspend =      rtl8150_suspend,
 190         .resume =       rtl8150_resume
 191 };
 192
 193 /*
 194 **
 195 **      device related part of the code
 196 **
 197 */
 198 static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
 199 {
 200         return usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
 201                                RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
 202                                indx, 0, data, size, 500);
 203 }
 204
 205 static int set_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
 206 {
 207         return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
 208                                RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
 209                                indx, 0, data, size, 500);
 210 }
 211
 212 static void ctrl_callback(struct urb *urb)
 213 {
 214         rtl8150_t *dev;
 215
 216         switch (urb->status) {
 217         case 0:
 218                 break;
 219         case -EINPROGRESS:
 220                 break;
 221         case -ENOENT:
 222                 break;
 223         default:
 224                 warn("ctrl urb status %d", urb->status);
 225         }
 226         dev = urb->context;
 227         clear_bit(RX_REG_SET, &dev->flags);
 228 }
 229
 230 static int async_set_registers(rtl8150_t * dev, u16 indx, u16 size)
 231 {
 232         int ret;
 233
 234         if (test_bit(RX_REG_SET, &dev->flags))
 235                 return -EAGAIN;
 236
 237         dev->dr.bRequestType = RTL8150_REQT_WRITE;
 238         dev->dr.bRequest = RTL8150_REQ_SET_REGS;
 239         dev->dr.wValue = cpu_to_le16(indx);
 240         dev->dr.wIndex = 0;
 241         dev->dr.wLength = cpu_to_le16(size);
 242         dev->ctrl_urb->transfer_buffer_length = size;
 243         usb_fill_control_urb(dev->ctrl_urb, dev->udev,
 244                          usb_sndctrlpipe(dev->udev, 0), (char *) &dev->dr,
 245                          &dev->rx_creg, size, ctrl_callback, dev);
 246         if ((ret = usb_submit_urb(dev->ctrl_urb, GFP_ATOMIC))) {
 247                 if (ret == -ENODEV)
 248                         netif_device_detach(dev->netdev);
 249                 err("control request submission failed: %d", ret);
 250         } else
 251                 set_bit(RX_REG_SET, &dev->flags);
 252
 253         return ret;
 254 }
 255
 256 static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
 257 {
 258         int i;
 259         u8 data[3], tmp;
 260
 261         data[0] = phy;
 262         data[1] = data[2] = 0;
 263         tmp = indx | PHY_READ | PHY_GO;
 264         i = 0;
 265
 266         set_registers(dev, PHYADD, sizeof(data), data);
 267         set_registers(dev, PHYCNT, 1, &tmp);
 268         do {
 269                 get_registers(dev, PHYCNT, 1, data);
 270         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 271
 272         if (i < MII_TIMEOUT) {
 273                 get_registers(dev, PHYDAT, 2, data);
 274                 *reg = data[0] | (data[1] << 8);
 275                 return 0;
 276         } else
 277                 return 1;
 278 }
 279
 280 static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
 281 {
 282         int i;
 283         u8 data[3], tmp;
 284
 285         data[0] = phy;
 286         data[1] = reg & 0xff;
 287         data[2] = (reg >> 8) & 0xff;
 288         tmp = indx | PHY_WRITE | PHY_GO;
 289         i = 0;
 290
 291         set_registers(dev, PHYADD, sizeof(data), data);
 292         set_registers(dev, PHYCNT, 1, &tmp);
 293         do {
 294                 get_registers(dev, PHYCNT, 1, data);
 295         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 296
 297         if (i < MII_TIMEOUT)
 298                 return 0;
 299         else
 300                 return 1;
 301 }
 302
 303 static inline void set_ethernet_addr(rtl8150_t * dev)
 304 {
 305         u8 node_id[6];
 306
 307         get_registers(dev, IDR, sizeof(node_id), node_id);
 308         memcpy(dev->netdev->dev_addr, node_id, sizeof(node_id));
 309 }
 310
 311 static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
 312 {
 313         struct sockaddr *addr = p;
 314         rtl8150_t *dev = netdev_priv(netdev);
 315         int i;
 316
 317         if (netif_running(netdev))
 318                 return -EBUSY;
 319
 320         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 321         dbg("%s: Setting MAC address to ", netdev->name);
 322         for (i = 0; i < 5; i++)
 323                 dbg("%02X:", netdev->dev_addr[i]);
 324         dbg("%02X\n", netdev->dev_addr[i]);
 325         /* Set the IDR registers. */
 326         set_registers(dev, IDR, sizeof(netdev->dev_addr), netdev->dev_addr);
 327 #ifdef EEPROM_WRITE
 328         {
 329         u8 cr;
 330         /* Get the CR contents. */
 331         get_registers(dev, CR, 1, &cr);
 332         /* Set the WEPROM bit (eeprom write enable). */
 333         cr |= 0x20;
 334         set_registers(dev, CR, 1, &cr);
 335         /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
 336            so we need to split them up. */
 337         for (i = 0; i * 2 < netdev->addr_len; i++) {
 338                 set_registers(dev, IDR_EEPROM + (i * 2), 2,
 339                 netdev->dev_addr + (i * 2));
 340         }
 341         /* Clear the WEPROM bit (preventing accidental eeprom writes). */
 342         cr &= 0xdf;
 343         set_registers(dev, CR, 1, &cr);
 344         }
 345 #endif
 346         return 0;
 347 }
 348
 349 static int rtl8150_reset(rtl8150_t * dev)
 350 {
 351         u8 data = 0x10;
 352         int i = HZ;
 353
 354         set_registers(dev, CR, 1, &data);
 355         do {
 356                 get_registers(dev, CR, 1, &data);
 357         } while ((data & 0x10) && --i);
 358
 359         return (i > 0) ? 1 : 0;
 360 }
 361
 362 static int alloc_all_urbs(rtl8150_t * dev)
 363 {
 364         dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 365         if (!dev->rx_urb)
 366                 return 0;
 367         dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 368         if (!dev->tx_urb) {
 369                 usb_free_urb(dev->rx_urb);
 370                 return 0;
 371         }
 372         dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
 373         if (!dev->intr_urb) {
 374                 usb_free_urb(dev->rx_urb);
 375                 usb_free_urb(dev->tx_urb);
 376                 return 0;
 377         }
 378         dev->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
 379         if (!dev->intr_urb) {
 380                 usb_free_urb(dev->rx_urb);
 381                 usb_free_urb(dev->tx_urb);
 382                 usb_free_urb(dev->intr_urb);
 383                 return 0;
 384         }
 385
 386         return 1;
 387 }
 388
 389 static void free_all_urbs(rtl8150_t * dev)
 390 {
 391         usb_free_urb(dev->rx_urb);
 392         usb_free_urb(dev->tx_urb);
 393         usb_free_urb(dev->intr_urb);
 394         usb_free_urb(dev->ctrl_urb);
 395 }
 396
 397 static void unlink_all_urbs(rtl8150_t * dev)
 398 {
 399         usb_kill_urb(dev->rx_urb);
 400         usb_kill_urb(dev->tx_urb);
 401         usb_kill_urb(dev->intr_urb);
 402         usb_kill_urb(dev->ctrl_urb);
 403 }
 404
 405 static inline struct sk_buff *pull_skb(rtl8150_t *dev)
 406 {
 407         struct sk_buff *skb;
 408         int i;
 409
 410         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 411                 if (dev->rx_skb_pool[i]) {
 412                         skb = dev->rx_skb_pool[i];
 413                         dev->rx_skb_pool[i] = NULL;
 414                         return skb;
 415                 }
 416         }
 417         return NULL;
 418 }
 419
 420 static void read_bulk_callback(struct urb *urb)
 421 {
 422         rtl8150_t *dev;
 423         unsigned pkt_len, res;
 424         struct sk_buff *skb;
 425         struct net_device *netdev;
 426         u16 rx_stat;
 427         int status;
 428
 429         dev = urb->context;
 430         if (!dev)
 431                 return;
 432         if (test_bit(RTL8150_UNPLUG, &dev->flags))
 433                 return;
 434         netdev = dev->netdev;
 435         if (!netif_device_present(netdev))
 436                 return;
 437
 438         switch (urb->status) {
 439         case 0:
 440                 break;
 441         case -ENOENT:
 442                 return; /* the urb is in unlink state */
 443         case -ETIME:
 444                 warn("may be reset is needed?..");
 445                 goto goon;
 446         default:
 447                 warn("Rx status %d", urb->status);
 448                 goto goon;
 449         }
 450
 451         if (!dev->rx_skb)
 452                 goto resched;
 453         /* protect against short packets (tell me why we got some?!?) */
 454         if (urb->actual_length < 4)
 455                 goto goon;
 456
 457         res = urb->actual_length;
 458         rx_stat = le16_to_cpu(*(__le16 *)(urb->transfer_buffer + res - 4));
 459         pkt_len = res - 4;
 460
 461         skb_put(dev->rx_skb, pkt_len);
 462         dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
 463         netif_rx(dev->rx_skb);
 464         dev->stats.rx_packets++;
 465         dev->stats.rx_bytes += pkt_len;
 466
 467         spin_lock(&dev->rx_pool_lock);
 468         skb = pull_skb(dev);
 469         spin_unlock(&dev->rx_pool_lock);
 470         if (!skb)
 471                 goto resched;
 472
 473         dev->rx_skb = skb;
 474 goon:
 475         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 476                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 477         status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
 478         if (status == -ENODEV)
 479                 netif_device_detach(dev->netdev);
 480         else if (status) {
 481                 set_bit(RX_URB_FAIL, &dev->flags);
 482                 goto resched;
 483         } else {
 484                 clear_bit(RX_URB_FAIL, &dev->flags);
 485         }
 486
 487         return;
 488 resched:
 489         tasklet_schedule(&dev->tl);
 490 }
 491
 492 static void rx_fixup(unsigned long data)
 493 {
 494         rtl8150_t *dev;
 495         struct sk_buff *skb;
 496         int status;
 497
 498         dev = (rtl8150_t *)data;
 499
 500         spin_lock_irq(&dev->rx_pool_lock);
 501         fill_skb_pool(dev);
 502         spin_unlock_irq(&dev->rx_pool_lock);
 503         if (test_bit(RX_URB_FAIL, &dev->flags))
 504                 if (dev->rx_skb)
 505                         goto try_again;
 506         spin_lock_irq(&dev->rx_pool_lock);
 507         skb = pull_skb(dev);
 508         spin_unlock_irq(&dev->rx_pool_lock);
 509         if (skb == NULL)
 510                 goto tlsched;
 511         dev->rx_skb = skb;
 512         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 513                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 514 try_again:
 515         status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
 516         if (status == -ENODEV) {
 517                 netif_device_detach(dev->netdev);
 518         } else if (status) {
 519                 set_bit(RX_URB_FAIL, &dev->flags);
 520                 goto tlsched;
 521         } else {
 522                 clear_bit(RX_URB_FAIL, &dev->flags);
 523         }
 524
 525         return;
 526 tlsched:
 527         tasklet_schedule(&dev->tl);
 528 }
 529
 530 static void write_bulk_callback(struct urb *urb)
 531 {
 532         rtl8150_t *dev;
 533
 534         dev = urb->context;
 535         if (!dev)
 536                 return;
 537         dev_kfree_skb_irq(dev->tx_skb);
 538         if (!netif_device_present(dev->netdev))
 539                 return;
 540         if (urb->status)
 541                 info("%s: Tx status %d", dev->netdev->name, urb->status);
 542         dev->netdev->trans_start = jiffies;
 543         netif_wake_queue(dev->netdev);
 544 }
 545
 546 static void intr_callback(struct urb *urb)
 547 {
 548         rtl8150_t *dev;
 549         __u8 *d;
 550         int status;
 551
 552         dev = urb->context;
 553         if (!dev)
 554                 return;
 555         switch (urb->status) {
 556         case 0:                 /* success */
 557                 break;
 558         case -ECONNRESET:       /* unlink */
 559         case -ENOENT:
 560         case -ESHUTDOWN:
 561                 return;
 562         /* -EPIPE:  should clear the halt */
 563         default:
 564                 info("%s: intr status %d", dev->netdev->name, urb->status);
 565                 goto resubmit;
 566         }
 567
 568         d = urb->transfer_buffer;
 569         if (d[0] & TSR_ERRORS) {
 570                 dev->stats.tx_errors++;
 571                 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
 572                         dev->stats.tx_aborted_errors++;
 573                 if (d[INT_TSR] & TSR_LCOL)
 574                         dev->stats.tx_window_errors++;
 575                 if (d[INT_TSR] & TSR_LOSS_CRS)
 576                         dev->stats.tx_carrier_errors++;
 577         }
 578         /* Report link status changes to the network stack */
 579         if ((d[INT_MSR] & MSR_LINK) == 0) {
 580                 if (netif_carrier_ok(dev->netdev)) {
 581                         netif_carrier_off(dev->netdev);
 582                         dbg("%s: LINK LOST\n", __func__);
 583                 }
 584         } else {
 585                 if (!netif_carrier_ok(dev->netdev)) {
 586                         netif_carrier_on(dev->netdev);
 587                         dbg("%s: LINK CAME BACK\n", __func__);
 588                 }
 589         }
 590
 591 resubmit:
 592         status = usb_submit_urb (urb, GFP_ATOMIC);
 593         if (status == -ENODEV)
 594                 netif_device_detach(dev->netdev);
 595         else if (status)
 596                 err ("can't resubmit intr, %s-%s/input0, status %d",
 597                                 dev->udev->bus->bus_name,
 598                                 dev->udev->devpath, status);
 599 }
 600
 601 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
 602 {
 603         rtl8150_t *dev = usb_get_intfdata(intf);
 604
 605         netif_device_detach(dev->netdev);
 606
 607         if (netif_running(dev->netdev)) {
 608                 usb_kill_urb(dev->rx_urb);
 609                 usb_kill_urb(dev->intr_urb);
 610         }
 611         return 0;
 612 }
 613
 614 static int rtl8150_resume(struct usb_interface *intf)
 615 {
 616         rtl8150_t *dev = usb_get_intfdata(intf);
 617
 618         netif_device_attach(dev->netdev);
 619         if (netif_running(dev->netdev)) {
 620                 dev->rx_urb->status = 0;
 621                 dev->rx_urb->actual_length = 0;
 622                 read_bulk_callback(dev->rx_urb);
 623
 624                 dev->intr_urb->status = 0;
 625                 dev->intr_urb->actual_length = 0;
 626                 intr_callback(dev->intr_urb);
 627         }
 628         return 0;
 629 }
 630
 631 /*
 632 **
 633 **      network related part of the code
 634 **
 635 */
 636
 637 static void fill_skb_pool(rtl8150_t *dev)
 638 {
 639         struct sk_buff *skb;
 640         int i;
 641
 642         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 643                 if (dev->rx_skb_pool[i])
 644                         continue;
 645                 skb = dev_alloc_skb(RTL8150_MTU + 2);
 646                 if (!skb) {
 647                         return;
 648                 }
 649                 skb->dev = dev->netdev;
 650                 skb_reserve(skb, 2);
 651                 dev->rx_skb_pool[i] = skb;
 652         }
 653 }
 654
 655 static void free_skb_pool(rtl8150_t *dev)
 656 {
 657         int i;
 658
 659         for (i = 0; i < RX_SKB_POOL_SIZE; i++)
 660                 if (dev->rx_skb_pool[i])
 661                         dev_kfree_skb(dev->rx_skb_pool[i]);
 662 }
 663
 664 static int enable_net_traffic(rtl8150_t * dev)
 665 {
 666         u8 cr, tcr, rcr, msr;
 667
 668         if (!rtl8150_reset(dev)) {
 669                 warn("%s - device reset failed", __FUNCTION__);
 670         }
 671         /* RCR bit7=1 attach Rx info at the end;  =0 HW CRC (which is broken) */
 672         rcr = 0x9e;
 673         dev->rx_creg = cpu_to_le16(rcr);
 674         tcr = 0xd8;
 675         cr = 0x0c;
 676         if (!(rcr & 0x80))
 677                 set_bit(RTL8150_HW_CRC, &dev->flags);
 678         set_registers(dev, RCR, 1, &rcr);
 679         set_registers(dev, TCR, 1, &tcr);
 680         set_registers(dev, CR, 1, &cr);
 681         get_registers(dev, MSR, 1, &msr);
 682
 683         return 0;
 684 }
 685
 686 static void disable_net_traffic(rtl8150_t * dev)
 687 {
 688         u8 cr;
 689
 690         get_registers(dev, CR, 1, &cr);
 691         cr &= 0xf3;
 692         set_registers(dev, CR, 1, &cr);
 693 }
 694
 695 static struct net_device_stats *rtl8150_netdev_stats(struct net_device *dev)
 696 {
 697         return &((rtl8150_t *)netdev_priv(dev))->stats;
 698 }
 699
 700 static void rtl8150_tx_timeout(struct net_device *netdev)
 701 {
 702         rtl8150_t *dev = netdev_priv(netdev);
 703         warn("%s: Tx timeout.", netdev->name);
 704         usb_unlink_urb(dev->tx_urb);
 705         dev->stats.tx_errors++;
 706 }
 707
 708 static void rtl8150_set_multicast(struct net_device *netdev)
 709 {
 710         rtl8150_t *dev = netdev_priv(netdev);
 711         netif_stop_queue(netdev);
 712         if (netdev->flags & IFF_PROMISC) {
 713                 dev->rx_creg |= cpu_to_le16(0x0001);
 714                 info("%s: promiscuous mode", netdev->name);
 715         } else if (netdev->mc_count ||
 716                    (netdev->flags & IFF_ALLMULTI)) {
 717                 dev->rx_creg &= cpu_to_le16(0xfffe);
 718                 dev->rx_creg |= cpu_to_le16(0x0002);
 719                 info("%s: allmulti set", netdev->name);
 720         } else {
 721                 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
 722                 dev->rx_creg &= cpu_to_le16(0x00fc);
 723         }
 724         async_set_registers(dev, RCR, 2);
 725         netif_wake_queue(netdev);
 726 }
 727
 728 static int rtl8150_start_xmit(struct sk_buff *skb, struct net_device *netdev)
 729 {
 730         rtl8150_t *dev = netdev_priv(netdev);
 731         int count, res;
 732
 733         netif_stop_queue(netdev);
 734         count = (skb->len < 60) ? 60 : skb->len;
 735         count = (count & 0x3f) ? count : count + 1;
 736         dev->tx_skb = skb;
 737         usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
 738                       skb->data, count, write_bulk_callback, dev);
 739         if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
 740                 /* Can we get/handle EPIPE here? */
 741                 if (res == -ENODEV)
 742                         netif_device_detach(dev->netdev);
 743                 else {
 744                         warn("failed tx_urb %d\n", res);
 745                         dev->stats.tx_errors++;
 746                         netif_start_queue(netdev);
 747                 }
 748         } else {
 749                 dev->stats.tx_packets++;
 750                 dev->stats.tx_bytes += skb->len;
 751                 netdev->trans_start = jiffies;
 752         }
 753
 754         return 0;
 755 }
 756
 757
 758 static void set_carrier(struct net_device *netdev)
 759 {
 760         rtl8150_t *dev = netdev_priv(netdev);
 761         short tmp;
 762
 763         get_registers(dev, CSCR, 2, &tmp);
 764         if (tmp & CSCR_LINK_STATUS)
 765                 netif_carrier_on(netdev);
 766         else
 767                 netif_carrier_off(netdev);
 768 }
 769
 770 static int rtl8150_open(struct net_device *netdev)
 771 {
 772         rtl8150_t *dev = netdev_priv(netdev);
 773         int res;
 774
 775         if (dev->rx_skb == NULL)
 776                 dev->rx_skb = pull_skb(dev);
 777         if (!dev->rx_skb)
 778                 return -ENOMEM;
 779
 780         set_registers(dev, IDR, 6, netdev->dev_addr);
 781
 782         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 783                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 784         if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
 785                 if (res == -ENODEV)
 786                         netif_device_detach(dev->netdev);
 787                 warn("%s: rx_urb submit failed: %d", __FUNCTION__, res);
 788                 return res;
 789         }
 790         usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
 791                      dev->intr_buff, INTBUFSIZE, intr_callback,
 792                      dev, dev->intr_interval);
 793         if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
 794                 if (res == -ENODEV)
 795                         netif_device_detach(dev->netdev);
 796                 warn("%s: intr_urb submit failed: %d", __FUNCTION__, res);
 797                 usb_kill_urb(dev->rx_urb);
 798                 return res;
 799         }
 800         enable_net_traffic(dev);
 801         set_carrier(netdev);
 802         netif_start_queue(netdev);
 803
 804         return res;
 805 }
 806
 807 static int rtl8150_close(struct net_device *netdev)
 808 {
 809         rtl8150_t *dev = netdev_priv(netdev);
 810         int res = 0;
 811
 812         netif_stop_queue(netdev);
 813         if (!test_bit(RTL8150_UNPLUG, &dev->flags))
 814                 disable_net_traffic(dev);
 815         unlink_all_urbs(dev);
 816
 817         return res;
 818 }
 819
 820 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
 821 {
 822         rtl8150_t *dev = netdev_priv(netdev);
 823
 824         strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
 825         strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
 826         usb_make_path(dev->udev, info->bus_info, sizeof info->bus_info);
 827 }
 828
 829 static int rtl8150_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
 830 {
 831         rtl8150_t *dev = netdev_priv(netdev);
 832         short lpa, bmcr;
 833
 834         ecmd->supported = (SUPPORTED_10baseT_Half |
 835                           SUPPORTED_10baseT_Full |
 836                           SUPPORTED_100baseT_Half |
 837                           SUPPORTED_100baseT_Full |
 838                           SUPPORTED_Autoneg |
 839                           SUPPORTED_TP | SUPPORTED_MII);
 840         ecmd->port = PORT_TP;
 841         ecmd->transceiver = XCVR_INTERNAL;
 842         ecmd->phy_address = dev->phy;
 843         get_registers(dev, BMCR, 2, &bmcr);
 844         get_registers(dev, ANLP, 2, &lpa);
 845         if (bmcr & BMCR_ANENABLE) {
 846                 ecmd->autoneg = AUTONEG_ENABLE;
 847                 ecmd->speed = (lpa & (LPA_100HALF | LPA_100FULL)) ?
 848                              SPEED_100 : SPEED_10;
 849                 if (ecmd->speed == SPEED_100)
 850                         ecmd->duplex = (lpa & LPA_100FULL) ?
 851                             DUPLEX_FULL : DUPLEX_HALF;
 852                 else
 853                         ecmd->duplex = (lpa & LPA_10FULL) ?
 854                             DUPLEX_FULL : DUPLEX_HALF;
 855         } else {
 856                 ecmd->autoneg = AUTONEG_DISABLE;
 857                 ecmd->speed = (bmcr & BMCR_SPEED100) ?
 858                     SPEED_100 : SPEED_10;
 859                 ecmd->duplex = (bmcr & BMCR_FULLDPLX) ?
 860                     DUPLEX_FULL : DUPLEX_HALF;
 861         }
 862         return 0;
 863 }
 864
 865 static struct ethtool_ops ops = {
 866         .get_drvinfo = rtl8150_get_drvinfo,
 867         .get_settings = rtl8150_get_settings,
 868         .get_link = ethtool_op_get_link
 869 };
 870
 871 static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 872 {
 873         rtl8150_t *dev = netdev_priv(netdev);
 874         u16 *data = (u16 *) & rq->ifr_ifru;
 875         int res = 0;
 876
 877         switch (cmd) {
 878         case SIOCDEVPRIVATE:
 879                 data[0] = dev->phy;
 880         case SIOCDEVPRIVATE + 1:
 881                 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
 882                 break;
 883         case SIOCDEVPRIVATE + 2:
 884                 if (!capable(CAP_NET_ADMIN))
 885                         return -EPERM;
 886                 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
 887                 break;
 888         default:
 889                 res = -EOPNOTSUPP;
 890         }
 891
 892         return res;
 893 }
 894
 895 static int rtl8150_probe(struct usb_interface *intf,
 896                          const struct usb_device_id *id)
 897 {
 898         struct usb_device *udev = interface_to_usbdev(intf);
 899         rtl8150_t *dev;
 900         struct net_device *netdev;
 901
 902         netdev = alloc_etherdev(sizeof(rtl8150_t));
 903         if (!netdev) {
 904                 err("Out of memory");
 905                 return -ENOMEM;
 906         }
 907
 908         dev = netdev_priv(netdev);
 909         memset(dev, 0, sizeof(rtl8150_t));
 910
 911         dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
 912         if (!dev->intr_buff) {
 913                 free_netdev(netdev);
 914                 return -ENOMEM;
 915         }
 916
 917         tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
 918         spin_lock_init(&dev->rx_pool_lock);
 919
 920         dev->udev = udev;
 921         dev->netdev = netdev;
 922         SET_MODULE_OWNER(netdev);
 923         netdev->open = rtl8150_open;
 924         netdev->stop = rtl8150_close;
 925         netdev->do_ioctl = rtl8150_ioctl;
 926         netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
 927         netdev->tx_timeout = rtl8150_tx_timeout;
 928         netdev->hard_start_xmit = rtl8150_start_xmit;
 929         netdev->set_multicast_list = rtl8150_set_multicast;
 930         netdev->set_mac_address = rtl8150_set_mac_address;
 931         netdev->get_stats = rtl8150_netdev_stats;
 932         netdev->mtu = RTL8150_MTU;
 933         SET_ETHTOOL_OPS(netdev, &ops);
 934         dev->intr_interval = 100;       /* 100ms */
 935
 936         if (!alloc_all_urbs(dev)) {
 937                 err("out of memory");
 938                 goto out;
 939         }
 940         if (!rtl8150_reset(dev)) {
 941                 err("couldn't reset the device");
 942                 goto out1;
 943         }
 944         fill_skb_pool(dev);
 945         set_ethernet_addr(dev);
 946
 947         usb_set_intfdata(intf, dev);
 948         SET_NETDEV_DEV(netdev, &intf->dev);
 949         if (register_netdev(netdev) != 0) {
 950                 err("couldn't register the device");
 951                 goto out2;
 952         }
 953
 954         info("%s: rtl8150 is detected", netdev->name);
 955
 956         return 0;
 957
 958 out2:
 959         usb_set_intfdata(intf, NULL);
 960         free_skb_pool(dev);
 961 out1:
 962         free_all_urbs(dev);
 963 out:
 964         kfree(dev->intr_buff);
 965         free_netdev(netdev);
 966         return -EIO;
 967 }
 968
 969 static void rtl8150_disconnect(struct usb_interface *intf)
 970 {
 971         rtl8150_t *dev = usb_get_intfdata(intf);
 972
 973         usb_set_intfdata(intf, NULL);
 974         if (dev) {
 975                 set_bit(RTL8150_UNPLUG, &dev->flags);
 976                 tasklet_disable(&dev->tl);
 977                 tasklet_kill(&dev->tl);
 978                 unregister_netdev(dev->netdev);
 979                 unlink_all_urbs(dev);
 980                 free_all_urbs(dev);
 981                 free_skb_pool(dev);
 982                 if (dev->rx_skb)
 983                         dev_kfree_skb(dev->rx_skb);
 984                 kfree(dev->intr_buff);
 985                 free_netdev(dev->netdev);
 986         }
 987 }
 988
 989 static int __init usb_rtl8150_init(void)
 990 {
 991         info(DRIVER_DESC " " DRIVER_VERSION);
 992         return usb_register(&rtl8150_driver);
 993 }
 994
 995 static void __exit usb_rtl8150_exit(void)
 996 {
 997         usb_deregister(&rtl8150_driver);
 998 }
 999
1000 module_init(usb_rtl8150_init);
1001 module_exit(usb_rtl8150_exit);
1002
1003 MODULE_AUTHOR(DRIVER_AUTHOR);
1004 MODULE_DESCRIPTION(DRIVER_DESC);
1005 MODULE_LICENSE("GPL");