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