SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/net/usb/rtl8150.c

   1 /*
   2  *  Copyright (c) 2002 Petko Manolov (petkan@users.sourceforge.net)
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * version 2 as published by the Free Software Foundation.
   7  */
   8
   9 #include <linux/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 *netdev;
 159         struct urb *rx_urb, *tx_urb, *intr_urb, *ctrl_urb;
 160         struct sk_buff *tx_skb, *rx_skb;
 161         struct sk_buff *rx_skb_pool[RX_SKB_POOL_SIZE];
 162         spinlock_t rx_pool_lock;
 163         struct usb_ctrlrequest dr;
 164         int intr_interval;
 165         __le16 rx_creg;
 166         u8 *intr_buff;
 167         u8 phy;
 168 };
 169
 170 typedef struct rtl8150 rtl8150_t;
 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 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message);
 179 static int rtl8150_resume(struct usb_interface *intf);
 180
 181 static const char driver_name [] = "rtl8150";
 182
 183 static struct usb_driver rtl8150_driver = {
 184         .name =         driver_name,
 185         .probe =        rtl8150_probe,
 186         .disconnect =   rtl8150_disconnect,
 187         .id_table =     rtl8150_table,
 188         .suspend =      rtl8150_suspend,
 189         .resume =       rtl8150_resume
 190 };
 191
 192 /*
 193 **
 194 **      device related part of the code
 195 **
 196 */
 197 static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
 198 {
 199         return usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
 200                                RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
 201                                indx, 0, data, size, 500);
 202 }
 203
 204 static int set_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
 205 {
 206         return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
 207                                RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
 208                                indx, 0, data, size, 500);
 209 }
 210
 211 static void ctrl_callback(struct urb *urb)
 212 {
 213         rtl8150_t *dev;
 214         int status = urb->status;
 215
 216         switch (status) {
 217         case 0:
 218                 break;
 219         case -EINPROGRESS:
 220                 break;
 221         case -ENOENT:
 222                 break;
 223         default:
 224                 if (printk_ratelimit())
 225                         dev_warn(&urb->dev->dev, "ctrl urb status %d\n", status);
 226         }
 227         dev = urb->context;
 228         clear_bit(RX_REG_SET, &dev->flags);
 229 }
 230
 231 static int async_set_registers(rtl8150_t * dev, u16 indx, u16 size)
 232 {
 233         int ret;
 234
 235         if (test_bit(RX_REG_SET, &dev->flags))
 236                 return -EAGAIN;
 237
 238         dev->dr.bRequestType = RTL8150_REQT_WRITE;
 239         dev->dr.bRequest = RTL8150_REQ_SET_REGS;
 240         dev->dr.wValue = cpu_to_le16(indx);
 241         dev->dr.wIndex = 0;
 242         dev->dr.wLength = cpu_to_le16(size);
 243         dev->ctrl_urb->transfer_buffer_length = size;
 244         usb_fill_control_urb(dev->ctrl_urb, dev->udev,
 245                          usb_sndctrlpipe(dev->udev, 0), (char *) &dev->dr,
 246                          &dev->rx_creg, size, ctrl_callback, dev);
 247         if ((ret = usb_submit_urb(dev->ctrl_urb, GFP_ATOMIC))) {
 248                 if (ret == -ENODEV)
 249                         netif_device_detach(dev->netdev);
 250                 err("control request submission failed: %d", ret);
 251         } else
 252                 set_bit(RX_REG_SET, &dev->flags);
 253
 254         return ret;
 255 }
 256
 257 static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
 258 {
 259         int i;
 260         u8 data[3], tmp;
 261
 262         data[0] = phy;
 263         data[1] = data[2] = 0;
 264         tmp = indx | PHY_READ | PHY_GO;
 265         i = 0;
 266
 267         set_registers(dev, PHYADD, sizeof(data), data);
 268         set_registers(dev, PHYCNT, 1, &tmp);
 269         do {
 270                 get_registers(dev, PHYCNT, 1, data);
 271         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 272
 273         if (i < MII_TIMEOUT) {
 274                 get_registers(dev, PHYDAT, 2, data);
 275                 *reg = data[0] | (data[1] << 8);
 276                 return 0;
 277         } else
 278                 return 1;
 279 }
 280
 281 static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
 282 {
 283         int i;
 284         u8 data[3], tmp;
 285
 286         data[0] = phy;
 287         data[1] = reg & 0xff;
 288         data[2] = (reg >> 8) & 0xff;
 289         tmp = indx | PHY_WRITE | PHY_GO;
 290         i = 0;
 291
 292         set_registers(dev, PHYADD, sizeof(data), data);
 293         set_registers(dev, PHYCNT, 1, &tmp);
 294         do {
 295                 get_registers(dev, PHYCNT, 1, data);
 296         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 297
 298         if (i < MII_TIMEOUT)
 299                 return 0;
 300         else
 301                 return 1;
 302 }
 303
 304 static inline void set_ethernet_addr(rtl8150_t * dev)
 305 {
 306         u8 node_id[6];
 307
 308         get_registers(dev, IDR, sizeof(node_id), node_id);
 309         memcpy(dev->netdev->dev_addr, node_id, sizeof(node_id));
 310 }
 311
 312 static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
 313 {
 314         struct sockaddr *addr = p;
 315         rtl8150_t *dev = netdev_priv(netdev);
 316         int i;
 317
 318         if (netif_running(netdev))
 319                 return -EBUSY;
 320
 321         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 322         dbg("%s: Setting MAC address to ", netdev->name);
 323         for (i = 0; i < 5; i++)
 324                 dbg("%02X:", netdev->dev_addr[i]);
 325         dbg("%02X\n", netdev->dev_addr[i]);
 326         /* Set the IDR registers. */
 327         set_registers(dev, IDR, sizeof(netdev->dev_addr), netdev->dev_addr);
 328 #ifdef EEPROM_WRITE
 329         {
 330         u8 cr;
 331         /* Get the CR contents. */
 332         get_registers(dev, CR, 1, &cr);
 333         /* Set the WEPROM bit (eeprom write enable). */
 334         cr |= 0x20;
 335         set_registers(dev, CR, 1, &cr);
 336         /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
 337            so we need to split them up. */
 338         for (i = 0; i * 2 < netdev->addr_len; i++) {
 339                 set_registers(dev, IDR_EEPROM + (i * 2), 2,
 340                 netdev->dev_addr + (i * 2));
 341         }
 342         /* Clear the WEPROM bit (preventing accidental eeprom writes). */
 343         cr &= 0xdf;
 344         set_registers(dev, CR, 1, &cr);
 345         }
 346 #endif
 347         return 0;
 348 }
 349
 350 static int rtl8150_reset(rtl8150_t * dev)
 351 {
 352         u8 data = 0x10;
 353         int i = HZ;
 354
 355         set_registers(dev, CR, 1, &data);
 356         do {
 357                 get_registers(dev, CR, 1, &data);
 358         } while ((data & 0x10) && --i);
 359
 360         return (i > 0) ? 1 : 0;
 361 }
 362
 363 static int alloc_all_urbs(rtl8150_t * dev)
 364 {
 365         dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 366         if (!dev->rx_urb)
 367                 return 0;
 368         dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 369         if (!dev->tx_urb) {
 370                 usb_free_urb(dev->rx_urb);
 371                 return 0;
 372         }
 373         dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
 374         if (!dev->intr_urb) {
 375                 usb_free_urb(dev->rx_urb);
 376                 usb_free_urb(dev->tx_urb);
 377                 return 0;
 378         }
 379         dev->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
 380         if (!dev->ctrl_urb) {
 381                 usb_free_urb(dev->rx_urb);
 382                 usb_free_urb(dev->tx_urb);
 383                 usb_free_urb(dev->intr_urb);
 384                 return 0;
 385         }
 386
 387         return 1;
 388 }
 389
 390 static void free_all_urbs(rtl8150_t * dev)
 391 {
 392         usb_free_urb(dev->rx_urb);
 393         usb_free_urb(dev->tx_urb);
 394         usb_free_urb(dev->intr_urb);
 395         usb_free_urb(dev->ctrl_urb);
 396 }
 397
 398 static void unlink_all_urbs(rtl8150_t * dev)
 399 {
 400         usb_kill_urb(dev->rx_urb);
 401         usb_kill_urb(dev->tx_urb);
 402         usb_kill_urb(dev->intr_urb);
 403         usb_kill_urb(dev->ctrl_urb);
 404 }
 405
 406 static inline struct sk_buff *pull_skb(rtl8150_t *dev)
 407 {
 408         struct sk_buff *skb;
 409         int i;
 410
 411         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 412                 if (dev->rx_skb_pool[i]) {
 413                         skb = dev->rx_skb_pool[i];
 414                         dev->rx_skb_pool[i] = NULL;
 415                         return skb;
 416                 }
 417         }
 418         return NULL;
 419 }
 420
 421 static void read_bulk_callback(struct urb *urb)
 422 {
 423         rtl8150_t *dev;
 424         unsigned pkt_len, res;
 425         struct sk_buff *skb;
 426         struct net_device *netdev;
 427         u16 rx_stat;
 428         int status = urb->status;
 429         int result;
 430
 431         dev = urb->context;
 432         if (!dev)
 433                 return;
 434         if (test_bit(RTL8150_UNPLUG, &dev->flags))
 435                 return;
 436         netdev = dev->netdev;
 437         if (!netif_device_present(netdev))
 438                 return;
 439
 440         switch (status) {
 441         case 0:
 442                 break;
 443         case -ENOENT:
 444                 return; /* the urb is in unlink state */
 445         case -ETIME:
 446                 if (printk_ratelimit())
 447                         dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
 448                 goto goon;
 449         default:
 450                 if (printk_ratelimit())
 451                         dev_warn(&urb->dev->dev, "Rx status %d\n", status);
 452                 goto goon;
 453         }
 454
 455         if (!dev->rx_skb)
 456                 goto resched;
 457         /* protect against short packets (tell me why we got some?!?) */
 458         if (urb->actual_length < 4)
 459                 goto goon;
 460
 461         res = urb->actual_length;
 462         rx_stat = le16_to_cpu(*(__le16 *)(urb->transfer_buffer + res - 4));
 463         pkt_len = res - 4;
 464
 465         skb_put(dev->rx_skb, pkt_len);
 466         dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
 467         netif_rx(dev->rx_skb);
 468         netdev->stats.rx_packets++;
 469         netdev->stats.rx_bytes += pkt_len;
 470
 471         spin_lock(&dev->rx_pool_lock);
 472         skb = pull_skb(dev);
 473         spin_unlock(&dev->rx_pool_lock);
 474         if (!skb)
 475                 goto resched;
 476
 477         dev->rx_skb = skb;
 478 goon:
 479         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 480                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 481         result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
 482         if (result == -ENODEV)
 483                 netif_device_detach(dev->netdev);
 484         else if (result) {
 485                 set_bit(RX_URB_FAIL, &dev->flags);
 486                 goto resched;
 487         } else {
 488                 clear_bit(RX_URB_FAIL, &dev->flags);
 489         }
 490
 491         return;
 492 resched:
 493         tasklet_schedule(&dev->tl);
 494 }
 495
 496 static void rx_fixup(unsigned long data)
 497 {
 498         rtl8150_t *dev;
 499         struct sk_buff *skb;
 500         int status;
 501
 502         dev = (rtl8150_t *)data;
 503
 504         spin_lock_irq(&dev->rx_pool_lock);
 505         fill_skb_pool(dev);
 506         spin_unlock_irq(&dev->rx_pool_lock);
 507         if (test_bit(RX_URB_FAIL, &dev->flags))
 508                 if (dev->rx_skb)
 509                         goto try_again;
 510         spin_lock_irq(&dev->rx_pool_lock);
 511         skb = pull_skb(dev);
 512         spin_unlock_irq(&dev->rx_pool_lock);
 513         if (skb == NULL)
 514                 goto tlsched;
 515         dev->rx_skb = skb;
 516         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 517                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 518 try_again:
 519         status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
 520         if (status == -ENODEV) {
 521                 netif_device_detach(dev->netdev);
 522         } else if (status) {
 523                 set_bit(RX_URB_FAIL, &dev->flags);
 524                 goto tlsched;
 525         } else {
 526                 clear_bit(RX_URB_FAIL, &dev->flags);
 527         }
 528
 529         return;
 530 tlsched:
 531         tasklet_schedule(&dev->tl);
 532 }
 533
 534 static void write_bulk_callback(struct urb *urb)
 535 {
 536         rtl8150_t *dev;
 537         int status = urb->status;
 538
 539         dev = urb->context;
 540         if (!dev)
 541                 return;
 542         dev_kfree_skb_irq(dev->tx_skb);
 543         if (!netif_device_present(dev->netdev))
 544                 return;
 545         if (status)
 546                 dev_info(&urb->dev->dev, "%s: Tx status %d\n",
 547                          dev->netdev->name, status);
 548         dev->netdev->trans_start = jiffies;
 549         netif_wake_queue(dev->netdev);
 550 }
 551
 552 static void intr_callback(struct urb *urb)
 553 {
 554         rtl8150_t *dev;
 555         __u8 *d;
 556         int status = urb->status;
 557         int res;
 558
 559         dev = urb->context;
 560         if (!dev)
 561                 return;
 562         switch (status) {
 563         case 0:                 /* success */
 564                 break;
 565         case -ECONNRESET:       /* unlink */
 566         case -ENOENT:
 567         case -ESHUTDOWN:
 568                 return;
 569         /* -EPIPE:  should clear the halt */
 570         default:
 571                 dev_info(&urb->dev->dev, "%s: intr status %d\n",
 572                          dev->netdev->name, status);
 573                 goto resubmit;
 574         }
 575
 576         d = urb->transfer_buffer;
 577         if (d[0] & TSR_ERRORS) {
 578                 dev->netdev->stats.tx_errors++;
 579                 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
 580                         dev->netdev->stats.tx_aborted_errors++;
 581                 if (d[INT_TSR] & TSR_LCOL)
 582                         dev->netdev->stats.tx_window_errors++;
 583                 if (d[INT_TSR] & TSR_LOSS_CRS)
 584                         dev->netdev->stats.tx_carrier_errors++;
 585         }
 586         /* Report link status changes to the network stack */
 587         if ((d[INT_MSR] & MSR_LINK) == 0) {
 588                 if (netif_carrier_ok(dev->netdev)) {
 589                         netif_carrier_off(dev->netdev);
 590                         dbg("%s: LINK LOST\n", __func__);
 591                 }
 592         } else {
 593                 if (!netif_carrier_ok(dev->netdev)) {
 594                         netif_carrier_on(dev->netdev);
 595                         dbg("%s: LINK CAME BACK\n", __func__);
 596                 }
 597         }
 598
 599 resubmit:
 600         res = usb_submit_urb (urb, GFP_ATOMIC);
 601         if (res == -ENODEV)
 602                 netif_device_detach(dev->netdev);
 603         else if (res)
 604                 err ("can't resubmit intr, %s-%s/input0, status %d",
 605                                 dev->udev->bus->bus_name,
 606                                 dev->udev->devpath, res);
 607 }
 608
 609 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
 610 {
 611         rtl8150_t *dev = usb_get_intfdata(intf);
 612
 613         netif_device_detach(dev->netdev);
 614
 615         if (netif_running(dev->netdev)) {
 616                 usb_kill_urb(dev->rx_urb);
 617                 usb_kill_urb(dev->intr_urb);
 618         }
 619         return 0;
 620 }
 621
 622 static int rtl8150_resume(struct usb_interface *intf)
 623 {
 624         rtl8150_t *dev = usb_get_intfdata(intf);
 625
 626         netif_device_attach(dev->netdev);
 627         if (netif_running(dev->netdev)) {
 628                 dev->rx_urb->status = 0;
 629                 dev->rx_urb->actual_length = 0;
 630                 read_bulk_callback(dev->rx_urb);
 631
 632                 dev->intr_urb->status = 0;
 633                 dev->intr_urb->actual_length = 0;
 634                 intr_callback(dev->intr_urb);
 635         }
 636         return 0;
 637 }
 638
 639 /*
 640 **
 641 **      network related part of the code
 642 **
 643 */
 644
 645 static void fill_skb_pool(rtl8150_t *dev)
 646 {
 647         struct sk_buff *skb;
 648         int i;
 649
 650         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 651                 if (dev->rx_skb_pool[i])
 652                         continue;
 653                 skb = dev_alloc_skb(RTL8150_MTU + 2);
 654                 if (!skb) {
 655                         return;
 656                 }
 657                 skb_reserve(skb, 2);
 658                 dev->rx_skb_pool[i] = skb;
 659         }
 660 }
 661
 662 static void free_skb_pool(rtl8150_t *dev)
 663 {
 664         int i;
 665
 666         for (i = 0; i < RX_SKB_POOL_SIZE; i++)
 667                 if (dev->rx_skb_pool[i])
 668                         dev_kfree_skb(dev->rx_skb_pool[i]);
 669 }
 670
 671 static int enable_net_traffic(rtl8150_t * dev)
 672 {
 673         u8 cr, tcr, rcr, msr;
 674
 675         if (!rtl8150_reset(dev)) {
 676                 dev_warn(&dev->udev->dev, "device reset failed\n");
 677         }
 678         /* RCR bit7=1 attach Rx info at the end;  =0 HW CRC (which is broken) */
 679         rcr = 0x9e;
 680         dev->rx_creg = cpu_to_le16(rcr);
 681         tcr = 0xd8;
 682         cr = 0x0c;
 683         if (!(rcr & 0x80))
 684                 set_bit(RTL8150_HW_CRC, &dev->flags);
 685         set_registers(dev, RCR, 1, &rcr);
 686         set_registers(dev, TCR, 1, &tcr);
 687         set_registers(dev, CR, 1, &cr);
 688         get_registers(dev, MSR, 1, &msr);
 689
 690         return 0;
 691 }
 692
 693 static void disable_net_traffic(rtl8150_t * dev)
 694 {
 695         u8 cr;
 696
 697         get_registers(dev, CR, 1, &cr);
 698         cr &= 0xf3;
 699         set_registers(dev, CR, 1, &cr);
 700 }
 701
 702 static void rtl8150_tx_timeout(struct net_device *netdev)
 703 {
 704         rtl8150_t *dev = netdev_priv(netdev);
 705         dev_warn(&netdev->dev, "Tx timeout.\n");
 706         usb_unlink_urb(dev->tx_urb);
 707         netdev->stats.tx_errors++;
 708 }
 709
 710 static void rtl8150_set_multicast(struct net_device *netdev)
 711 {
 712         rtl8150_t *dev = netdev_priv(netdev);
 713         netif_stop_queue(netdev);
 714         if (netdev->flags & IFF_PROMISC) {
 715                 dev->rx_creg |= cpu_to_le16(0x0001);
 716                 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
 717         } else if (netdev->mc_count ||
 718                    (netdev->flags & IFF_ALLMULTI)) {
 719                 dev->rx_creg &= cpu_to_le16(0xfffe);
 720                 dev->rx_creg |= cpu_to_le16(0x0002);
 721                 dev_info(&netdev->dev, "%s: allmulti set\n", netdev->name);
 722         } else {
 723                 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
 724                 dev->rx_creg &= cpu_to_le16(0x00fc);
 725         }
 726         async_set_registers(dev, RCR, 2);
 727         netif_wake_queue(netdev);
 728 }
 729
 730 static int rtl8150_start_xmit(struct sk_buff *skb, struct net_device *netdev)
 731 {
 732         rtl8150_t *dev = netdev_priv(netdev);
 733         int count, res;
 734
 735         netif_stop_queue(netdev);
 736         count = (skb->len < 60) ? 60 : skb->len;
 737         count = (count & 0x3f) ? count : count + 1;
 738         dev->tx_skb = skb;
 739         usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
 740                       skb->data, count, write_bulk_callback, dev);
 741         if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
 742                 /* Can we get/handle EPIPE here? */
 743                 if (res == -ENODEV)
 744                         netif_device_detach(dev->netdev);
 745                 else {
 746                         dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
 747                         netdev->stats.tx_errors++;
 748                         netif_start_queue(netdev);
 749                 }
 750         } else {
 751                 netdev->stats.tx_packets++;
 752                 netdev->stats.tx_bytes += skb->len;
 753                 netdev->trans_start = jiffies;
 754         }
 755
 756         return 0;
 757 }
 758
 759
 760 static void set_carrier(struct net_device *netdev)
 761 {
 762         rtl8150_t *dev = netdev_priv(netdev);
 763         short tmp;
 764
 765         get_registers(dev, CSCR, 2, &tmp);
 766         if (tmp & CSCR_LINK_STATUS)
 767                 netif_carrier_on(netdev);
 768         else
 769                 netif_carrier_off(netdev);
 770 }
 771
 772 static int rtl8150_open(struct net_device *netdev)
 773 {
 774         rtl8150_t *dev = netdev_priv(netdev);
 775         int res;
 776
 777         if (dev->rx_skb == NULL)
 778                 dev->rx_skb = pull_skb(dev);
 779         if (!dev->rx_skb)
 780                 return -ENOMEM;
 781
 782         set_registers(dev, IDR, 6, netdev->dev_addr);
 783
 784         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 785                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 786         if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
 787                 if (res == -ENODEV)
 788                         netif_device_detach(dev->netdev);
 789                 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
 790                 return res;
 791         }
 792         usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
 793                      dev->intr_buff, INTBUFSIZE, intr_callback,
 794                      dev, dev->intr_interval);
 795         if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
 796                 if (res == -ENODEV)
 797                         netif_device_detach(dev->netdev);
 798                 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
 799                 usb_kill_urb(dev->rx_urb);
 800                 return res;
 801         }
 802         enable_net_traffic(dev);
 803         set_carrier(netdev);
 804         netif_start_queue(netdev);
 805
 806         return res;
 807 }
 808
 809 static int rtl8150_close(struct net_device *netdev)
 810 {
 811         rtl8150_t *dev = netdev_priv(netdev);
 812         int res = 0;
 813
 814         netif_stop_queue(netdev);
 815         if (!test_bit(RTL8150_UNPLUG, &dev->flags))
 816                 disable_net_traffic(dev);
 817         unlink_all_urbs(dev);
 818
 819         return res;
 820 }
 821
 822 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
 823 {
 824         rtl8150_t *dev = netdev_priv(netdev);
 825
 826         strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
 827         strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
 828         usb_make_path(dev->udev, info->bus_info, sizeof info->bus_info);
 829 }
 830
 831 static int rtl8150_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
 832 {
 833         rtl8150_t *dev = netdev_priv(netdev);
 834         short lpa, bmcr;
 835
 836         ecmd->supported = (SUPPORTED_10baseT_Half |
 837                           SUPPORTED_10baseT_Full |
 838                           SUPPORTED_100baseT_Half |
 839                           SUPPORTED_100baseT_Full |
 840                           SUPPORTED_Autoneg |
 841                           SUPPORTED_TP | SUPPORTED_MII);
 842         ecmd->port = PORT_TP;
 843         ecmd->transceiver = XCVR_INTERNAL;
 844         ecmd->phy_address = dev->phy;
 845         get_registers(dev, BMCR, 2, &bmcr);
 846         get_registers(dev, ANLP, 2, &lpa);
 847         if (bmcr & BMCR_ANENABLE) {
 848                 ecmd->autoneg = AUTONEG_ENABLE;
 849                 ecmd->speed = (lpa & (LPA_100HALF | LPA_100FULL)) ?
 850                              SPEED_100 : SPEED_10;
 851                 if (ecmd->speed == SPEED_100)
 852                         ecmd->duplex = (lpa & LPA_100FULL) ?
 853                             DUPLEX_FULL : DUPLEX_HALF;
 854                 else
 855                         ecmd->duplex = (lpa & LPA_10FULL) ?
 856                             DUPLEX_FULL : DUPLEX_HALF;
 857         } else {
 858                 ecmd->autoneg = AUTONEG_DISABLE;
 859                 ecmd->speed = (bmcr & BMCR_SPEED100) ?
 860                     SPEED_100 : SPEED_10;
 861                 ecmd->duplex = (bmcr & BMCR_FULLDPLX) ?
 862                     DUPLEX_FULL : DUPLEX_HALF;
 863         }
 864         return 0;
 865 }
 866
 867 static struct ethtool_ops ops = {
 868         .get_drvinfo = rtl8150_get_drvinfo,
 869         .get_settings = rtl8150_get_settings,
 870         .get_link = ethtool_op_get_link
 871 };
 872
 873 static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 874 {
 875         rtl8150_t *dev = netdev_priv(netdev);
 876         u16 *data = (u16 *) & rq->ifr_ifru;
 877         int res = 0;
 878
 879         switch (cmd) {
 880         case SIOCDEVPRIVATE:
 881                 data[0] = dev->phy;
 882         case SIOCDEVPRIVATE + 1:
 883                 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
 884                 break;
 885         case SIOCDEVPRIVATE + 2:
 886                 if (!capable(CAP_NET_ADMIN))
 887                         return -EPERM;
 888                 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
 889                 break;
 890         default:
 891                 res = -EOPNOTSUPP;
 892         }
 893
 894         return res;
 895 }
 896
 897 static const struct net_device_ops rtl8150_netdev_ops = {
 898         .ndo_open               = rtl8150_open,
 899         .ndo_stop               = rtl8150_close,
 900         .ndo_do_ioctl           = rtl8150_ioctl,
 901         .ndo_start_xmit         = rtl8150_start_xmit,
 902         .ndo_tx_timeout         = rtl8150_tx_timeout,
 903         .ndo_set_multicast_list = rtl8150_set_multicast,
 904         .ndo_set_mac_address    = rtl8150_set_mac_address,
 905
 906         .ndo_change_mtu         = eth_change_mtu,
 907         .ndo_validate_addr      = eth_validate_addr,
 908 };
 909
 910 static int rtl8150_probe(struct usb_interface *intf,
 911                          const struct usb_device_id *id)
 912 {
 913         struct usb_device *udev = interface_to_usbdev(intf);
 914         rtl8150_t *dev;
 915         struct net_device *netdev;
 916
 917         netdev = alloc_etherdev(sizeof(rtl8150_t));
 918         if (!netdev) {
 919                 err("Out of memory");
 920                 return -ENOMEM;
 921         }
 922
 923         dev = netdev_priv(netdev);
 924
 925         dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
 926         if (!dev->intr_buff) {
 927                 free_netdev(netdev);
 928                 return -ENOMEM;
 929         }
 930
 931         tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
 932         spin_lock_init(&dev->rx_pool_lock);
 933
 934         dev->udev = udev;
 935         dev->netdev = netdev;
 936         netdev->netdev_ops = &rtl8150_netdev_ops;
 937         netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
 938         SET_ETHTOOL_OPS(netdev, &ops);
 939         dev->intr_interval = 100;       /* 100ms */
 940
 941         if (!alloc_all_urbs(dev)) {
 942                 err("out of memory");
 943                 goto out;
 944         }
 945         if (!rtl8150_reset(dev)) {
 946                 err("couldn't reset the device");
 947                 goto out1;
 948         }
 949         fill_skb_pool(dev);
 950         set_ethernet_addr(dev);
 951
 952         usb_set_intfdata(intf, dev);
 953         SET_NETDEV_DEV(netdev, &intf->dev);
 954         if (register_netdev(netdev) != 0) {
 955                 err("couldn't register the device");
 956                 goto out2;
 957         }
 958
 959         dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
 960
 961         return 0;
 962
 963 out2:
 964         usb_set_intfdata(intf, NULL);
 965         free_skb_pool(dev);
 966 out1:
 967         free_all_urbs(dev);
 968 out:
 969         kfree(dev->intr_buff);
 970         free_netdev(netdev);
 971         return -EIO;
 972 }
 973
 974 static void rtl8150_disconnect(struct usb_interface *intf)
 975 {
 976         rtl8150_t *dev = usb_get_intfdata(intf);
 977
 978         usb_set_intfdata(intf, NULL);
 979         if (dev) {
 980                 set_bit(RTL8150_UNPLUG, &dev->flags);
 981                 tasklet_disable(&dev->tl);
 982                 tasklet_kill(&dev->tl);
 983                 unregister_netdev(dev->netdev);
 984                 unlink_all_urbs(dev);
 985                 free_all_urbs(dev);
 986                 free_skb_pool(dev);
 987                 if (dev->rx_skb)
 988                         dev_kfree_skb(dev->rx_skb);
 989                 kfree(dev->intr_buff);
 990                 free_netdev(dev->netdev);
 991         }
 992 }
 993
 994 static int __init usb_rtl8150_init(void)
 995 {
 996         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
 997                DRIVER_DESC "\n");
 998         return usb_register(&rtl8150_driver);
 999 }
1000
1001 static void __exit usb_rtl8150_exit(void)
1002 {
1003         usb_deregister(&rtl8150_driver);
1004 }
1005
1006 module_init(usb_rtl8150_init);
1007 module_exit(usb_rtl8150_exit);
1008
1009 MODULE_AUTHOR(DRIVER_AUTHOR);
1010 MODULE_DESCRIPTION(DRIVER_DESC);
1011 MODULE_LICENSE("GPL");