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/config.h>
  10 #include <linux/sched.h>
  11 #include <linux/init.h>
  12 #include <linux/signal.h>
  13 #include <linux/slab.h>
  14 #include <linux/module.h>
  15 #include <linux/netdevice.h>
  16 #include <linux/etherdevice.h>
  17 #include <linux/mii.h>
  18 #include <linux/ethtool.h>
  19 #include <linux/usb.h>
  20 #include <asm/uaccess.h>
  21
  22 /* Version Information */
  23 #define DRIVER_VERSION "v0.6.2 (2004/08/27)"
  24 #define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>"
  25 #define DRIVER_DESC "rtl8150 based usb-ethernet driver"
  26
  27 #define IDR                     0x0120
  28 #define MAR                     0x0126
  29 #define CR                      0x012e
  30 #define TCR                     0x012f
  31 #define RCR                     0x0130
  32 #define TSR                     0x0132
  33 #define RSR                     0x0133
  34 #define CON0                    0x0135
  35 #define CON1                    0x0136
  36 #define MSR                     0x0137
  37 #define PHYADD                  0x0138
  38 #define PHYDAT                  0x0139
  39 #define PHYCNT                  0x013b
  40 #define GPPC                    0x013d
  41 #define BMCR                    0x0140
  42 #define BMSR                    0x0142
  43 #define ANAR                    0x0144
  44 #define ANLP                    0x0146
  45 #define AER                     0x0148
  46 #define CSCR                    0x014C  /* This one has the link status */
  47 #define CSCR_LINK_STATUS        (1 << 3)
  48
  49 #define IDR_EEPROM              0x1202
  50
  51 #define PHY_READ                0
  52 #define PHY_WRITE               0x20
  53 #define PHY_GO                  0x40
  54
  55 #define MII_TIMEOUT             10
  56 #define INTBUFSIZE              8
  57
  58 #define RTL8150_REQT_READ       0xc0
  59 #define RTL8150_REQT_WRITE      0x40
  60 #define RTL8150_REQ_GET_REGS    0x05
  61 #define RTL8150_REQ_SET_REGS    0x05
  62
  63
  64 /* Transmit status register errors */
  65 #define TSR_ECOL                (1<<5)
  66 #define TSR_LCOL                (1<<4)
  67 #define TSR_LOSS_CRS            (1<<3)
  68 #define TSR_JBR                 (1<<2)
  69 #define TSR_ERRORS              (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
  70 /* Receive status register errors */
  71 #define RSR_CRC                 (1<<2)
  72 #define RSR_FAE                 (1<<1)
  73 #define RSR_ERRORS              (RSR_CRC | RSR_FAE)
  74
  75 /* Media status register definitions */
  76 #define MSR_DUPLEX              (1<<4)
  77 #define MSR_SPEED               (1<<3)
  78 #define MSR_LINK                (1<<2)
  79
  80 /* Interrupt pipe data */
  81 #define INT_TSR                 0x00
  82 #define INT_RSR                 0x01
  83 #define INT_MSR                 0x02
  84 #define INT_WAKSR               0x03
  85 #define INT_TXOK_CNT            0x04
  86 #define INT_RXLOST_CNT          0x05
  87 #define INT_CRERR_CNT           0x06
  88 #define INT_COL_CNT             0x07
  89
  90 /* Transmit status register errors */
  91 #define TSR_ECOL                (1<<5)
  92 #define TSR_LCOL                (1<<4)
  93 #define TSR_LOSS_CRS            (1<<3)
  94 #define TSR_JBR                 (1<<2)
  95 #define TSR_ERRORS              (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
  96 /* Receive status register errors */
  97 #define RSR_CRC                 (1<<2)
  98 #define RSR_FAE                 (1<<1)
  99 #define RSR_ERRORS              (RSR_CRC | RSR_FAE)
 100
 101 /* Media status register definitions */
 102 #define MSR_DUPLEX              (1<<4)
 103 #define MSR_SPEED               (1<<3)
 104 #define MSR_LINK                (1<<2)
 105
 106 /* Interrupt pipe data */
 107 #define INT_TSR                 0x00
 108 #define INT_RSR                 0x01
 109 #define INT_MSR                 0x02
 110 #define INT_WAKSR               0x03
 111 #define INT_TXOK_CNT            0x04
 112 #define INT_RXLOST_CNT          0x05
 113 #define INT_CRERR_CNT           0x06
 114 #define INT_COL_CNT             0x07
 115
 116
 117 #define RTL8150_MTU             1540
 118 #define RTL8150_TX_TIMEOUT      (HZ)
 119 #define RX_SKB_POOL_SIZE        4
 120
 121 /* rtl8150 flags */
 122 #define RTL8150_HW_CRC          0
 123 #define RX_REG_SET              1
 124 #define RTL8150_UNPLUG          2
 125 #define RX_URB_FAIL             3
 126
 127 /* Define these values to match your device */
 128 #define VENDOR_ID_REALTEK               0x0bda
 129 #define VENDOR_ID_MELCO                 0x0411
 130 #define VENDOR_ID_MICRONET              0x3980
 131 #define VENDOR_ID_LONGSHINE             0x07b8
 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
 138 #undef  EEPROM_WRITE
 139
 140 /* table of devices that work with this driver */
 141 static struct usb_device_id rtl8150_table[] = {
 142         {USB_DEVICE(VENDOR_ID_REALTEK, PRODUCT_ID_RTL8150)},
 143         {USB_DEVICE(VENDOR_ID_MELCO, PRODUCT_ID_LUAKTX)},
 144         {USB_DEVICE(VENDOR_ID_MICRONET, PRODUCT_ID_SP128AR)},
 145         {USB_DEVICE(VENDOR_ID_LONGSHINE, PRODUCT_ID_LCS8138TX)},
 146         {}
 147 };
 148
 149 MODULE_DEVICE_TABLE(usb, rtl8150_table);
 150
 151 struct rtl8150 {
 152         unsigned long flags;
 153         struct usb_device *udev;
 154         struct tasklet_struct tl;
 155         struct net_device_stats stats;
 156         struct net_device *netdev;
 157         struct urb *rx_urb, *tx_urb, *intr_urb, *ctrl_urb;
 158         struct sk_buff *tx_skb, *rx_skb;
 159         struct sk_buff *rx_skb_pool[RX_SKB_POOL_SIZE];
 160         spinlock_t rx_pool_lock;
 161         struct usb_ctrlrequest dr;
 162         int intr_interval;
 163         __le16 rx_creg;
 164         u8 *intr_buff;
 165         u8 phy;
 166 };
 167
 168 typedef struct rtl8150 rtl8150_t;
 169
 170 static unsigned long multicast_filter_limit = 32;
 171
 172 static void fill_skb_pool(rtl8150_t *);
 173 static void free_skb_pool(rtl8150_t *);
 174 static inline struct sk_buff *pull_skb(rtl8150_t *);
 175 static void rtl8150_disconnect(struct usb_interface *intf);
 176 static int rtl8150_probe(struct usb_interface *intf,
 177                            const struct usb_device_id *id);
 178
 179 static const char driver_name [] = "rtl8150";
 180
 181 static struct usb_driver rtl8150_driver = {
 182         .owner =        THIS_MODULE,
 183         .name =         driver_name,
 184         .probe =        rtl8150_probe,
 185         .disconnect =   rtl8150_disconnect,
 186         .id_table =     rtl8150_table,
 187 };
 188
 189 /*
 190 **
 191 **      device related part of the code
 192 **
 193 */
 194 static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
 195 {
 196         return usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
 197                                RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
 198                                indx, 0, data, size, 500);
 199 }
 200
 201 static int set_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
 202 {
 203         return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
 204                                RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
 205                                indx, 0, data, size, 500);
 206 }
 207
 208 static void ctrl_callback(struct urb *urb, struct pt_regs *regs)
 209 {
 210         rtl8150_t *dev;
 211
 212         switch (urb->status) {
 213         case 0:
 214                 break;
 215         case -EINPROGRESS:
 216                 break;
 217         case -ENOENT:
 218                 break;
 219         default:
 220                 warn("ctrl urb status %d", urb->status);
 221         }
 222         dev = urb->context;
 223         clear_bit(RX_REG_SET, &dev->flags);
 224 }
 225
 226 static int async_set_registers(rtl8150_t * dev, u16 indx, u16 size)
 227 {
 228         int ret;
 229
 230         if (test_bit(RX_REG_SET, &dev->flags))
 231                 return -EAGAIN;
 232
 233         dev->dr.bRequestType = RTL8150_REQT_WRITE;
 234         dev->dr.bRequest = RTL8150_REQ_SET_REGS;
 235         dev->dr.wValue = cpu_to_le16(indx);
 236         dev->dr.wIndex = 0;
 237         dev->dr.wLength = cpu_to_le16(size);
 238         dev->ctrl_urb->transfer_buffer_length = size;
 239         usb_fill_control_urb(dev->ctrl_urb, dev->udev,
 240                          usb_sndctrlpipe(dev->udev, 0), (char *) &dev->dr,
 241                          &dev->rx_creg, size, ctrl_callback, dev);
 242         if ((ret = usb_submit_urb(dev->ctrl_urb, GFP_ATOMIC)))
 243                 err("control request submission failed: %d", ret);
 244         else
 245                 set_bit(RX_REG_SET, &dev->flags);
 246
 247         return ret;
 248 }
 249
 250 static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
 251 {
 252         int i;
 253         u8 data[3], tmp;
 254
 255         data[0] = phy;
 256         data[1] = data[2] = 0;
 257         tmp = indx | PHY_READ | PHY_GO;
 258         i = 0;
 259
 260         set_registers(dev, PHYADD, sizeof(data), data);
 261         set_registers(dev, PHYCNT, 1, &tmp);
 262         do {
 263                 get_registers(dev, PHYCNT, 1, data);
 264         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 265
 266         if (i < MII_TIMEOUT) {
 267                 get_registers(dev, PHYDAT, 2, data);
 268                 *reg = data[0] | (data[1] << 8);
 269                 return 0;
 270         } else
 271                 return 1;
 272 }
 273
 274 static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
 275 {
 276         int i;
 277         u8 data[3], tmp;
 278
 279         data[0] = phy;
 280         *(data + 1) = cpu_to_le16p(&reg);
 281         tmp = indx | PHY_WRITE | PHY_GO;
 282         i = 0;
 283
 284         set_registers(dev, PHYADD, sizeof(data), data);
 285         set_registers(dev, PHYCNT, 1, &tmp);
 286         do {
 287                 get_registers(dev, PHYCNT, 1, data);
 288         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 289
 290         if (i < MII_TIMEOUT)
 291                 return 0;
 292         else
 293                 return 1;
 294 }
 295
 296 static inline void set_ethernet_addr(rtl8150_t * dev)
 297 {
 298         u8 node_id[6];
 299
 300         get_registers(dev, IDR, sizeof(node_id), node_id);
 301         memcpy(dev->netdev->dev_addr, node_id, sizeof(node_id));
 302 }
 303
 304 static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
 305 {
 306         struct sockaddr *addr = p;
 307         rtl8150_t *dev = netdev_priv(netdev);
 308         int i;
 309
 310         if (netif_running(netdev))
 311                 return -EBUSY;
 312
 313         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 314         dbg("%s: Setting MAC address to ", netdev->name);
 315         for (i = 0; i < 5; i++)
 316                 dbg("%02X:", netdev->dev_addr[i]);
 317         dbg("%02X\n", netdev->dev_addr[i]);
 318         /* Set the IDR registers. */
 319         set_registers(dev, IDR, sizeof(netdev->dev_addr), netdev->dev_addr);
 320 #ifdef EEPROM_WRITE
 321         {
 322         u8 cr;
 323         /* Get the CR contents. */
 324         get_registers(dev, CR, 1, &cr);
 325         /* Set the WEPROM bit (eeprom write enable). */
 326         cr |= 0x20;
 327         set_registers(dev, CR, 1, &cr);
 328         /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
 329            so we need to split them up. */
 330         for (i = 0; i * 2 < netdev->addr_len; i++) {
 331                 set_registers(dev, IDR_EEPROM + (i * 2), 2,
 332                 netdev->dev_addr + (i * 2));
 333         }
 334         /* Clear the WEPROM bit (preventing accidental eeprom writes). */
 335         cr &= 0xdf;
 336         set_registers(dev, CR, 1, &cr);
 337         }
 338 #endif
 339         return 0;
 340 }
 341
 342 static int rtl8150_reset(rtl8150_t * dev)
 343 {
 344         u8 data = 0x10;
 345         int i = HZ;
 346
 347         set_registers(dev, CR, 1, &data);
 348         do {
 349                 get_registers(dev, CR, 1, &data);
 350         } while ((data & 0x10) && --i);
 351
 352         return (i > 0) ? 1 : 0;
 353 }
 354
 355 static int alloc_all_urbs(rtl8150_t * dev)
 356 {
 357         dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 358         if (!dev->rx_urb)
 359                 return 0;
 360         dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 361         if (!dev->tx_urb) {
 362                 usb_free_urb(dev->rx_urb);
 363                 return 0;
 364         }
 365         dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
 366         if (!dev->intr_urb) {
 367                 usb_free_urb(dev->rx_urb);
 368                 usb_free_urb(dev->tx_urb);
 369                 return 0;
 370         }
 371         dev->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
 372         if (!dev->intr_urb) {
 373                 usb_free_urb(dev->rx_urb);
 374                 usb_free_urb(dev->tx_urb);
 375                 usb_free_urb(dev->intr_urb);
 376                 return 0;
 377         }
 378
 379         return 1;
 380 }
 381
 382 static void free_all_urbs(rtl8150_t * dev)
 383 {
 384         usb_free_urb(dev->rx_urb);
 385         usb_free_urb(dev->tx_urb);
 386         usb_free_urb(dev->intr_urb);
 387         usb_free_urb(dev->ctrl_urb);
 388 }
 389
 390 static void unlink_all_urbs(rtl8150_t * dev)
 391 {
 392         usb_kill_urb(dev->rx_urb);
 393         usb_kill_urb(dev->tx_urb);
 394         usb_kill_urb(dev->intr_urb);
 395         usb_kill_urb(dev->ctrl_urb);
 396 }
 397
 398 static inline struct sk_buff *pull_skb(rtl8150_t *dev)
 399 {
 400         struct sk_buff *skb;
 401         int i;
 402
 403         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 404                 if (dev->rx_skb_pool[i]) {
 405                         skb = dev->rx_skb_pool[i];
 406                         dev->rx_skb_pool[i] = NULL;
 407                         return skb;
 408                 }
 409         }
 410         return NULL;
 411 }
 412
 413 static void read_bulk_callback(struct urb *urb, struct pt_regs *regs)
 414 {
 415         rtl8150_t *dev;
 416         unsigned pkt_len, res;
 417         struct sk_buff *skb;
 418         struct net_device *netdev;
 419         u16 rx_stat;
 420
 421         dev = urb->context;
 422         if (!dev)
 423                 return;
 424         if (test_bit(RTL8150_UNPLUG, &dev->flags))
 425                 return;
 426         netdev = dev->netdev;
 427         if (!netif_device_present(netdev))
 428                 return;
 429
 430         switch (urb->status) {
 431         case 0:
 432                 break;
 433         case -ENOENT:
 434                 return; /* the urb is in unlink state */
 435         case -ETIMEDOUT:
 436                 warn("may be reset is needed?..");
 437                 goto goon;
 438         default:
 439                 warn("Rx status %d", urb->status);
 440                 goto goon;
 441         }
 442
 443         if (!dev->rx_skb)
 444                 goto resched;
 445         /* protect against short packets (tell me why we got some?!?) */
 446         if (urb->actual_length < 4)
 447                 goto goon;
 448
 449         res = urb->actual_length;
 450         rx_stat = le16_to_cpu(*(__le16 *)(urb->transfer_buffer + res - 4));
 451         pkt_len = res - 4;
 452
 453         skb_put(dev->rx_skb, pkt_len);
 454         dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
 455         netif_rx(dev->rx_skb);
 456         dev->stats.rx_packets++;
 457         dev->stats.rx_bytes += pkt_len;
 458
 459         spin_lock(&dev->rx_pool_lock);
 460         skb = pull_skb(dev);
 461         spin_unlock(&dev->rx_pool_lock);
 462         if (!skb)
 463                 goto resched;
 464
 465         dev->rx_skb = skb;
 466 goon:
 467         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 468                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 469         if (usb_submit_urb(dev->rx_urb, GFP_ATOMIC)) {
 470                 set_bit(RX_URB_FAIL, &dev->flags);
 471                 goto resched;
 472         } else {
 473                 clear_bit(RX_URB_FAIL, &dev->flags);
 474         }
 475
 476         return;
 477 resched:
 478         tasklet_schedule(&dev->tl);
 479 }
 480
 481 static void rx_fixup(unsigned long data)
 482 {
 483         rtl8150_t *dev;
 484         struct sk_buff *skb;
 485
 486         dev = (rtl8150_t *)data;
 487
 488         spin_lock_irq(&dev->rx_pool_lock);
 489         fill_skb_pool(dev);
 490         spin_unlock_irq(&dev->rx_pool_lock);
 491         if (test_bit(RX_URB_FAIL, &dev->flags))
 492                 if (dev->rx_skb)
 493                         goto try_again;
 494         spin_lock_irq(&dev->rx_pool_lock);
 495         skb = pull_skb(dev);
 496         spin_unlock_irq(&dev->rx_pool_lock);
 497         if (skb == NULL)
 498                 goto tlsched;
 499         dev->rx_skb = skb;
 500         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 501                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 502 try_again:
 503         if (usb_submit_urb(dev->rx_urb, GFP_ATOMIC)) {
 504                 set_bit(RX_URB_FAIL, &dev->flags);
 505                 goto tlsched;
 506          } else {
 507                 clear_bit(RX_URB_FAIL, &dev->flags);
 508         }
 509
 510         return;
 511 tlsched:
 512         tasklet_schedule(&dev->tl);
 513 }
 514
 515 static void write_bulk_callback(struct urb *urb, struct pt_regs *regs)
 516 {
 517         rtl8150_t *dev;
 518
 519         dev = urb->context;
 520         if (!dev)
 521                 return;
 522         dev_kfree_skb_irq(dev->tx_skb);
 523         if (!netif_device_present(dev->netdev))
 524                 return;
 525         if (urb->status)
 526                 info("%s: Tx status %d", dev->netdev->name, urb->status);
 527         dev->netdev->trans_start = jiffies;
 528         netif_wake_queue(dev->netdev);
 529 }
 530
 531 static void intr_callback(struct urb *urb, struct pt_regs *regs)
 532 {
 533         rtl8150_t *dev;
 534         __u8 *d;
 535         int status;
 536
 537         dev = urb->context;
 538         if (!dev)
 539                 return;
 540         switch (urb->status) {
 541         case 0:                 /* success */
 542                 break;
 543         case -ECONNRESET:       /* unlink */
 544         case -ENOENT:
 545         case -ESHUTDOWN:
 546                 return;
 547         /* -EPIPE:  should clear the halt */
 548         default:
 549                 info("%s: intr status %d", dev->netdev->name, urb->status);
 550                 goto resubmit;
 551         }
 552
 553         d = urb->transfer_buffer;
 554         if (d[0] & TSR_ERRORS) {
 555                 dev->stats.tx_errors++;
 556                 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
 557                         dev->stats.tx_aborted_errors++;
 558                 if (d[INT_TSR] & TSR_LCOL)
 559                         dev->stats.tx_window_errors++;
 560                 if (d[INT_TSR] & TSR_LOSS_CRS)
 561                         dev->stats.tx_carrier_errors++;
 562         }
 563         /* Report link status changes to the network stack */
 564         if ((d[INT_MSR] & MSR_LINK) == 0) {
 565                 if (netif_carrier_ok(dev->netdev)) {
 566                         netif_carrier_off(dev->netdev);
 567                         dbg("%s: LINK LOST\n", __func__);
 568                 }
 569         } else {
 570                 if (!netif_carrier_ok(dev->netdev)) {
 571                         netif_carrier_on(dev->netdev);
 572                         dbg("%s: LINK CAME BACK\n", __func__);
 573                 }
 574         }
 575
 576 resubmit:
 577         status = usb_submit_urb (urb, SLAB_ATOMIC);
 578         if (status)
 579                 err ("can't resubmit intr, %s-%s/input0, status %d",
 580                                 dev->udev->bus->bus_name,
 581                                 dev->udev->devpath, status);
 582 }
 583
 584
 585 /*
 586 **
 587 **      network related part of the code
 588 **
 589 */
 590
 591 static void fill_skb_pool(rtl8150_t *dev)
 592 {
 593         struct sk_buff *skb;
 594         int i;
 595
 596         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 597                 if (dev->rx_skb_pool[i])
 598                         continue;
 599                 skb = dev_alloc_skb(RTL8150_MTU + 2);
 600                 if (!skb) {
 601                         return;
 602                 }
 603                 skb->dev = dev->netdev;
 604                 skb_reserve(skb, 2);
 605                 dev->rx_skb_pool[i] = skb;
 606         }
 607 }
 608
 609 static void free_skb_pool(rtl8150_t *dev)
 610 {
 611         int i;
 612
 613         for (i = 0; i < RX_SKB_POOL_SIZE; i++)
 614                 if (dev->rx_skb_pool[i])
 615                         dev_kfree_skb(dev->rx_skb_pool[i]);
 616 }
 617
 618 static int enable_net_traffic(rtl8150_t * dev)
 619 {
 620         u8 cr, tcr, rcr, msr;
 621
 622         if (!rtl8150_reset(dev)) {
 623                 warn("%s - device reset failed", __FUNCTION__);
 624         }
 625         /* RCR bit7=1 attach Rx info at the end;  =0 HW CRC (which is broken) */
 626         rcr = 0x9e;
 627         dev->rx_creg = cpu_to_le16(rcr);
 628         tcr = 0xd8;
 629         cr = 0x0c;
 630         if (!(rcr & 0x80))
 631                 set_bit(RTL8150_HW_CRC, &dev->flags);
 632         set_registers(dev, RCR, 1, &rcr);
 633         set_registers(dev, TCR, 1, &tcr);
 634         set_registers(dev, CR, 1, &cr);
 635         get_registers(dev, MSR, 1, &msr);
 636
 637         return 0;
 638 }
 639
 640 static void disable_net_traffic(rtl8150_t * dev)
 641 {
 642         u8 cr;
 643
 644         get_registers(dev, CR, 1, &cr);
 645         cr &= 0xf3;
 646         set_registers(dev, CR, 1, &cr);
 647 }
 648
 649 static struct net_device_stats *rtl8150_netdev_stats(struct net_device *dev)
 650 {
 651         return &((rtl8150_t *)netdev_priv(dev))->stats;
 652 }
 653
 654 static void rtl8150_tx_timeout(struct net_device *netdev)
 655 {
 656         rtl8150_t *dev = netdev_priv(netdev);
 657         warn("%s: Tx timeout.", netdev->name);
 658         dev->tx_urb->transfer_flags |= URB_ASYNC_UNLINK;
 659         usb_unlink_urb(dev->tx_urb);
 660         dev->stats.tx_errors++;
 661 }
 662
 663 static void rtl8150_set_multicast(struct net_device *netdev)
 664 {
 665         rtl8150_t *dev = netdev_priv(netdev);
 666         netif_stop_queue(netdev);
 667         if (netdev->flags & IFF_PROMISC) {
 668                 dev->rx_creg |= cpu_to_le16(0x0001);
 669                 info("%s: promiscuous mode", netdev->name);
 670         } else if (netdev->mc_count ||
 671                    (netdev->flags & IFF_ALLMULTI)) {
 672                 dev->rx_creg &= cpu_to_le16(0xfffe);
 673                 dev->rx_creg |= cpu_to_le16(0x0002);
 674                 info("%s: allmulti set", netdev->name);
 675         } else {
 676                 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
 677                 dev->rx_creg &= cpu_to_le16(0x00fc);
 678         }
 679         async_set_registers(dev, RCR, 2);
 680         netif_wake_queue(netdev);
 681 }
 682
 683 static int rtl8150_start_xmit(struct sk_buff *skb, struct net_device *netdev)
 684 {
 685         rtl8150_t *dev = netdev_priv(netdev);
 686         int count, res;
 687
 688         netif_stop_queue(netdev);
 689         count = (skb->len < 60) ? 60 : skb->len;
 690         count = (count & 0x3f) ? count : count + 1;
 691         dev->tx_skb = skb;
 692         usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
 693                       skb->data, count, write_bulk_callback, dev);
 694         if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
 695                 warn("failed tx_urb %d\n", res);
 696                 dev->stats.tx_errors++;
 697                 netif_start_queue(netdev);
 698         } else {
 699                 dev->stats.tx_packets++;
 700                 dev->stats.tx_bytes += skb->len;
 701                 netdev->trans_start = jiffies;
 702         }
 703
 704         return 0;
 705 }
 706
 707
 708 static void set_carrier(struct net_device *netdev)
 709 {
 710         rtl8150_t *dev = netdev_priv(netdev);
 711         short tmp;
 712
 713         get_registers(dev, CSCR, 2, &tmp);
 714         if (tmp & CSCR_LINK_STATUS)
 715                 netif_carrier_on(netdev);
 716         else
 717                 netif_carrier_off(netdev);
 718 }
 719
 720 static int rtl8150_open(struct net_device *netdev)
 721 {
 722         rtl8150_t *dev = netdev_priv(netdev);
 723         int res;
 724
 725         if (dev->rx_skb == NULL)
 726                 dev->rx_skb = pull_skb(dev);
 727         if (!dev->rx_skb)
 728                 return -ENOMEM;
 729
 730         set_registers(dev, IDR, 6, netdev->dev_addr);
 731
 732         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 733                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 734         if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL)))
 735                 warn("%s: rx_urb submit failed: %d", __FUNCTION__, res);
 736         usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
 737                      dev->intr_buff, INTBUFSIZE, intr_callback,
 738                      dev, dev->intr_interval);
 739         if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL)))
 740                 warn("%s: intr_urb submit failed: %d", __FUNCTION__, res);
 741         netif_start_queue(netdev);
 742         enable_net_traffic(dev);
 743         set_carrier(netdev);
 744
 745         return res;
 746 }
 747
 748 static int rtl8150_close(struct net_device *netdev)
 749 {
 750         rtl8150_t *dev = netdev_priv(netdev);
 751         int res = 0;
 752
 753         netif_stop_queue(netdev);
 754         if (!test_bit(RTL8150_UNPLUG, &dev->flags))
 755                 disable_net_traffic(dev);
 756         unlink_all_urbs(dev);
 757
 758         return res;
 759 }
 760
 761 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
 762 {
 763         rtl8150_t *dev = netdev_priv(netdev);
 764
 765         strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
 766         strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
 767         usb_make_path(dev->udev, info->bus_info, sizeof info->bus_info);
 768 }
 769
 770 static int rtl8150_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
 771 {
 772         rtl8150_t *dev = netdev_priv(netdev);
 773         short lpa, bmcr;
 774
 775         ecmd->supported = (SUPPORTED_10baseT_Half |
 776                           SUPPORTED_10baseT_Full |
 777                           SUPPORTED_100baseT_Half |
 778                           SUPPORTED_100baseT_Full |
 779                           SUPPORTED_Autoneg |
 780                           SUPPORTED_TP | SUPPORTED_MII);
 781         ecmd->port = PORT_TP;
 782         ecmd->transceiver = XCVR_INTERNAL;
 783         ecmd->phy_address = dev->phy;
 784         get_registers(dev, BMCR, 2, &bmcr);
 785         get_registers(dev, ANLP, 2, &lpa);
 786         if (bmcr & BMCR_ANENABLE) {
 787                 ecmd->autoneg = AUTONEG_ENABLE;
 788                 ecmd->speed = (lpa & (LPA_100HALF | LPA_100FULL)) ?
 789                              SPEED_100 : SPEED_10;
 790                 if (ecmd->speed == SPEED_100)
 791                         ecmd->duplex = (lpa & LPA_100FULL) ?
 792                             DUPLEX_FULL : DUPLEX_HALF;
 793                 else
 794                         ecmd->duplex = (lpa & LPA_10FULL) ?
 795                             DUPLEX_FULL : DUPLEX_HALF;
 796         } else {
 797                 ecmd->autoneg = AUTONEG_DISABLE;
 798                 ecmd->speed = (bmcr & BMCR_SPEED100) ?
 799                     SPEED_100 : SPEED_10;
 800                 ecmd->duplex = (bmcr & BMCR_FULLDPLX) ?
 801                     DUPLEX_FULL : DUPLEX_HALF;
 802         }
 803         return 0;
 804 }
 805
 806 static struct ethtool_ops ops = {
 807         .get_drvinfo = rtl8150_get_drvinfo,
 808         .get_settings = rtl8150_get_settings,
 809         .get_link = ethtool_op_get_link
 810 };
 811
 812 static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 813 {
 814         rtl8150_t *dev = netdev_priv(netdev);
 815         u16 *data = (u16 *) & rq->ifr_ifru;
 816         int res = 0;
 817
 818         switch (cmd) {
 819         case SIOCDEVPRIVATE:
 820                 data[0] = dev->phy;
 821         case SIOCDEVPRIVATE + 1:
 822                 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
 823                 break;
 824         case SIOCDEVPRIVATE + 2:
 825                 if (!capable(CAP_NET_ADMIN))
 826                         return -EPERM;
 827                 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
 828                 break;
 829         default:
 830                 res = -EOPNOTSUPP;
 831         }
 832
 833         return res;
 834 }
 835
 836 static int rtl8150_probe(struct usb_interface *intf,
 837                          const struct usb_device_id *id)
 838 {
 839         struct usb_device *udev = interface_to_usbdev(intf);
 840         rtl8150_t *dev;
 841         struct net_device *netdev;
 842
 843         netdev = alloc_etherdev(sizeof(rtl8150_t));
 844         if (!netdev) {
 845                 err("Out of memory");
 846                 return -ENOMEM;
 847         }
 848
 849         dev = netdev_priv(netdev);
 850         memset(dev, 0, sizeof(rtl8150_t));
 851
 852         dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
 853         if (!dev->intr_buff) {
 854                 free_netdev(netdev);
 855                 return -ENOMEM;
 856         }
 857
 858         tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
 859         spin_lock_init(&dev->rx_pool_lock);
 860
 861         dev->udev = udev;
 862         dev->netdev = netdev;
 863         SET_MODULE_OWNER(netdev);
 864         netdev->open = rtl8150_open;
 865         netdev->stop = rtl8150_close;
 866         netdev->do_ioctl = rtl8150_ioctl;
 867         netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
 868         netdev->tx_timeout = rtl8150_tx_timeout;
 869         netdev->hard_start_xmit = rtl8150_start_xmit;
 870         netdev->set_multicast_list = rtl8150_set_multicast;
 871         netdev->set_mac_address = rtl8150_set_mac_address;
 872         netdev->get_stats = rtl8150_netdev_stats;
 873         netdev->mtu = RTL8150_MTU;
 874         SET_ETHTOOL_OPS(netdev, &ops);
 875         dev->intr_interval = 100;       /* 100ms */
 876
 877         if (!alloc_all_urbs(dev)) {
 878                 err("out of memory");
 879                 goto out;
 880         }
 881         if (!rtl8150_reset(dev)) {
 882                 err("couldn't reset the device");
 883                 goto out1;
 884         }
 885         fill_skb_pool(dev);
 886         set_ethernet_addr(dev);
 887         info("%s: rtl8150 is detected", netdev->name);
 888
 889         usb_set_intfdata(intf, dev);
 890         SET_NETDEV_DEV(netdev, &intf->dev);
 891         if (register_netdev(netdev) != 0) {
 892                 err("couldn't register the device");
 893                 goto out2;
 894         }
 895         return 0;
 896
 897 out2:
 898         usb_set_intfdata(intf, NULL);
 899         free_skb_pool(dev);
 900 out1:
 901         free_all_urbs(dev);
 902 out:
 903         kfree(dev->intr_buff);
 904         free_netdev(netdev);
 905         return -EIO;
 906 }
 907
 908 static void rtl8150_disconnect(struct usb_interface *intf)
 909 {
 910         rtl8150_t *dev = usb_get_intfdata(intf);
 911
 912         usb_set_intfdata(intf, NULL);
 913         if (dev) {
 914                 set_bit(RTL8150_UNPLUG, &dev->flags);
 915                 unregister_netdev(dev->netdev);
 916                 unlink_all_urbs(dev);
 917                 free_all_urbs(dev);
 918                 free_skb_pool(dev);
 919                 if (dev->rx_skb)
 920                         dev_kfree_skb(dev->rx_skb);
 921                 kfree(dev->intr_buff);
 922                 free_netdev(dev->netdev);
 923         }
 924 }
 925
 926 static int __init usb_rtl8150_init(void)
 927 {
 928         info(DRIVER_DESC " " DRIVER_VERSION);
 929         return usb_register(&rtl8150_driver);
 930 }
 931
 932 static void __exit usb_rtl8150_exit(void)
 933 {
 934         usb_deregister(&rtl8150_driver);
 935 }
 936
 937 module_init(usb_rtl8150_init);
 938 module_exit(usb_rtl8150_exit);
 939
 940 MODULE_AUTHOR(DRIVER_AUTHOR);
 941 MODULE_DESCRIPTION(DRIVER_DESC);
 942 MODULE_LICENSE("GPL");