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/sched.h>
  10 #include <linux/init.h>
  11 #include <linux/signal.h>
  12 #include <linux/slab.h>
  13 #include <linux/module.h>
  14 #include <linux/netdevice.h>
  15 #include <linux/etherdevice.h>
  16 #include <linux/mii.h>
  17 #include <linux/ethtool.h>
  18 #include <linux/usb.h>
  19 #include <asm/uaccess.h>
  20
  21 /* Version Information */
  22 #define DRIVER_VERSION "v0.6.2 (2004/08/27)"
  23 #define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>"
  24 #define DRIVER_DESC "rtl8150 based usb-ethernet driver"
  25
  26 #define IDR                     0x0120
  27 #define MAR                     0x0126
  28 #define CR                      0x012e
  29 #define TCR                     0x012f
  30 #define RCR                     0x0130
  31 #define TSR                     0x0132
  32 #define RSR                     0x0133
  33 #define CON0                    0x0135
  34 #define CON1                    0x0136
  35 #define MSR                     0x0137
  36 #define PHYADD                  0x0138
  37 #define PHYDAT                  0x0139
  38 #define PHYCNT                  0x013b
  39 #define GPPC                    0x013d
  40 #define BMCR                    0x0140
  41 #define BMSR                    0x0142
  42 #define ANAR                    0x0144
  43 #define ANLP                    0x0146
  44 #define AER                     0x0148
  45 #define CSCR                    0x014C  /* This one has the link status */
  46 #define CSCR_LINK_STATUS        (1 << 3)
  47
  48 #define IDR_EEPROM              0x1202
  49
  50 #define PHY_READ                0
  51 #define PHY_WRITE               0x20
  52 #define PHY_GO                  0x40
  53
  54 #define MII_TIMEOUT             10
  55 #define INTBUFSIZE              8
  56
  57 #define RTL8150_REQT_READ       0xc0
  58 #define RTL8150_REQT_WRITE      0x40
  59 #define RTL8150_REQ_GET_REGS    0x05
  60 #define RTL8150_REQ_SET_REGS    0x05
  61
  62
  63 /* Transmit status register errors */
  64 #define TSR_ECOL                (1<<5)
  65 #define TSR_LCOL                (1<<4)
  66 #define TSR_LOSS_CRS            (1<<3)
  67 #define TSR_JBR                 (1<<2)
  68 #define TSR_ERRORS              (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
  69 /* Receive status register errors */
  70 #define RSR_CRC                 (1<<2)
  71 #define RSR_FAE                 (1<<1)
  72 #define RSR_ERRORS              (RSR_CRC | RSR_FAE)
  73
  74 /* Media status register definitions */
  75 #define MSR_DUPLEX              (1<<4)
  76 #define MSR_SPEED               (1<<3)
  77 #define MSR_LINK                (1<<2)
  78
  79 /* Interrupt pipe data */
  80 #define INT_TSR                 0x00
  81 #define INT_RSR                 0x01
  82 #define INT_MSR                 0x02
  83 #define INT_WAKSR               0x03
  84 #define INT_TXOK_CNT            0x04
  85 #define INT_RXLOST_CNT          0x05
  86 #define INT_CRERR_CNT           0x06
  87 #define INT_COL_CNT             0x07
  88
  89 /* Transmit status register errors */
  90 #define TSR_ECOL                (1<<5)
  91 #define TSR_LCOL                (1<<4)
  92 #define TSR_LOSS_CRS            (1<<3)
  93 #define TSR_JBR                 (1<<2)
  94 #define TSR_ERRORS              (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
  95 /* Receive status register errors */
  96 #define RSR_CRC                 (1<<2)
  97 #define RSR_FAE                 (1<<1)
  98 #define RSR_ERRORS              (RSR_CRC | RSR_FAE)
  99
 100 /* Media status register definitions */
 101 #define MSR_DUPLEX              (1<<4)
 102 #define MSR_SPEED               (1<<3)
 103 #define MSR_LINK                (1<<2)
 104
 105 /* Interrupt pipe data */
 106 #define INT_TSR                 0x00
 107 #define INT_RSR                 0x01
 108 #define INT_MSR                 0x02
 109 #define INT_WAKSR               0x03
 110 #define INT_TXOK_CNT            0x04
 111 #define INT_RXLOST_CNT          0x05
 112 #define INT_CRERR_CNT           0x06
 113 #define INT_COL_CNT             0x07
 114
 115
 116 #define RTL8150_MTU             1540
 117 #define RTL8150_TX_TIMEOUT      (HZ)
 118 #define RX_SKB_POOL_SIZE        4
 119
 120 /* rtl8150 flags */
 121 #define RTL8150_HW_CRC          0
 122 #define RX_REG_SET              1
 123 #define RTL8150_UNPLUG          2
 124 #define RX_URB_FAIL             3
 125
 126 /* Define these values to match your device */
 127 #define VENDOR_ID_REALTEK               0x0bda
 128 #define VENDOR_ID_MELCO                 0x0411
 129 #define VENDOR_ID_MICRONET              0x3980
 130 #define VENDOR_ID_LONGSHINE             0x07b8
 131 #define VENDOR_ID_OQO                   0x1557
 132 #define VENDOR_ID_ZYXEL                 0x0586
 133
 134 #define PRODUCT_ID_RTL8150              0x8150
 135 #define PRODUCT_ID_LUAKTX               0x0012
 136 #define PRODUCT_ID_LCS8138TX            0x401a
 137 #define PRODUCT_ID_SP128AR              0x0003
 138 #define PRODUCT_ID_PRESTIGE             0x401a
 139
 140 #undef  EEPROM_WRITE
 141
 142 /* table of devices that work with this driver */
 143 static struct usb_device_id rtl8150_table[] = {
 144         {USB_DEVICE(VENDOR_ID_REALTEK, PRODUCT_ID_RTL8150)},
 145         {USB_DEVICE(VENDOR_ID_MELCO, PRODUCT_ID_LUAKTX)},
 146         {USB_DEVICE(VENDOR_ID_MICRONET, PRODUCT_ID_SP128AR)},
 147         {USB_DEVICE(VENDOR_ID_LONGSHINE, PRODUCT_ID_LCS8138TX)},
 148         {USB_DEVICE(VENDOR_ID_OQO, PRODUCT_ID_RTL8150)},
 149         {USB_DEVICE(VENDOR_ID_ZYXEL, PRODUCT_ID_PRESTIGE)},
 150         {}
 151 };
 152
 153 MODULE_DEVICE_TABLE(usb, rtl8150_table);
 154
 155 struct rtl8150 {
 156         unsigned long flags;
 157         struct usb_device *udev;
 158         struct tasklet_struct tl;
 159         struct net_device_stats stats;
 160         struct net_device *netdev;
 161         struct urb *rx_urb, *tx_urb, *intr_urb, *ctrl_urb;
 162         struct sk_buff *tx_skb, *rx_skb;
 163         struct sk_buff *rx_skb_pool[RX_SKB_POOL_SIZE];
 164         spinlock_t rx_pool_lock;
 165         struct usb_ctrlrequest dr;
 166         int intr_interval;
 167         __le16 rx_creg;
 168         u8 *intr_buff;
 169         u8 phy;
 170 };
 171
 172 typedef struct rtl8150 rtl8150_t;
 173
 174 static void fill_skb_pool(rtl8150_t *);
 175 static void free_skb_pool(rtl8150_t *);
 176 static inline struct sk_buff *pull_skb(rtl8150_t *);
 177 static void rtl8150_disconnect(struct usb_interface *intf);
 178 static int rtl8150_probe(struct usb_interface *intf,
 179                            const struct usb_device_id *id);
 180 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message);
 181 static int rtl8150_resume(struct usb_interface *intf);
 182
 183 static const char driver_name [] = "rtl8150";
 184
 185 static struct usb_driver rtl8150_driver = {
 186         .name =         driver_name,
 187         .probe =        rtl8150_probe,
 188         .disconnect =   rtl8150_disconnect,
 189         .id_table =     rtl8150_table,
 190         .suspend =      rtl8150_suspend,
 191         .resume =       rtl8150_resume
 192 };
 193
 194 /*
 195 **
 196 **      device related part of the code
 197 **
 198 */
 199 static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
 200 {
 201         return usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
 202                                RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
 203                                indx, 0, data, size, 500);
 204 }
 205
 206 static int set_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
 207 {
 208         return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
 209                                RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
 210                                indx, 0, data, size, 500);
 211 }
 212
 213 static void ctrl_callback(struct urb *urb)
 214 {
 215         rtl8150_t *dev;
 216
 217         switch (urb->status) {
 218         case 0:
 219                 break;
 220         case -EINPROGRESS:
 221                 break;
 222         case -ENOENT:
 223                 break;
 224         default:
 225                 warn("ctrl urb status %d", urb->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->intr_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;
 429
 430         dev = urb->context;
 431         if (!dev)
 432                 return;
 433         if (test_bit(RTL8150_UNPLUG, &dev->flags))
 434                 return;
 435         netdev = dev->netdev;
 436         if (!netif_device_present(netdev))
 437                 return;
 438
 439         switch (urb->status) {
 440         case 0:
 441                 break;
 442         case -ENOENT:
 443                 return; /* the urb is in unlink state */
 444         case -ETIME:
 445                 warn("may be reset is needed?..");
 446                 goto goon;
 447         default:
 448                 warn("Rx status %d", urb->status);
 449                 goto goon;
 450         }
 451
 452         if (!dev->rx_skb)
 453                 goto resched;
 454         /* protect against short packets (tell me why we got some?!?) */
 455         if (urb->actual_length < 4)
 456                 goto goon;
 457
 458         res = urb->actual_length;
 459         rx_stat = le16_to_cpu(*(__le16 *)(urb->transfer_buffer + res - 4));
 460         pkt_len = res - 4;
 461
 462         skb_put(dev->rx_skb, pkt_len);
 463         dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
 464         netif_rx(dev->rx_skb);
 465         dev->stats.rx_packets++;
 466         dev->stats.rx_bytes += pkt_len;
 467
 468         spin_lock(&dev->rx_pool_lock);
 469         skb = pull_skb(dev);
 470         spin_unlock(&dev->rx_pool_lock);
 471         if (!skb)
 472                 goto resched;
 473
 474         dev->rx_skb = skb;
 475 goon:
 476         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 477                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 478         status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
 479         if (status == -ENODEV)
 480                 netif_device_detach(dev->netdev);
 481         else if (status) {
 482                 set_bit(RX_URB_FAIL, &dev->flags);
 483                 goto resched;
 484         } else {
 485                 clear_bit(RX_URB_FAIL, &dev->flags);
 486         }
 487
 488         return;
 489 resched:
 490         tasklet_schedule(&dev->tl);
 491 }
 492
 493 static void rx_fixup(unsigned long data)
 494 {
 495         rtl8150_t *dev;
 496         struct sk_buff *skb;
 497         int status;
 498
 499         dev = (rtl8150_t *)data;
 500
 501         spin_lock_irq(&dev->rx_pool_lock);
 502         fill_skb_pool(dev);
 503         spin_unlock_irq(&dev->rx_pool_lock);
 504         if (test_bit(RX_URB_FAIL, &dev->flags))
 505                 if (dev->rx_skb)
 506                         goto try_again;
 507         spin_lock_irq(&dev->rx_pool_lock);
 508         skb = pull_skb(dev);
 509         spin_unlock_irq(&dev->rx_pool_lock);
 510         if (skb == NULL)
 511                 goto tlsched;
 512         dev->rx_skb = skb;
 513         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 514                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 515 try_again:
 516         status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
 517         if (status == -ENODEV) {
 518                 netif_device_detach(dev->netdev);
 519         } else if (status) {
 520                 set_bit(RX_URB_FAIL, &dev->flags);
 521                 goto tlsched;
 522         } else {
 523                 clear_bit(RX_URB_FAIL, &dev->flags);
 524         }
 525
 526         return;
 527 tlsched:
 528         tasklet_schedule(&dev->tl);
 529 }
 530
 531 static void write_bulk_callback(struct urb *urb)
 532 {
 533         rtl8150_t *dev;
 534
 535         dev = urb->context;
 536         if (!dev)
 537                 return;
 538         dev_kfree_skb_irq(dev->tx_skb);
 539         if (!netif_device_present(dev->netdev))
 540                 return;
 541         if (urb->status)
 542                 info("%s: Tx status %d", dev->netdev->name, urb->status);
 543         dev->netdev->trans_start = jiffies;
 544         netif_wake_queue(dev->netdev);
 545 }
 546
 547 static void intr_callback(struct urb *urb)
 548 {
 549         rtl8150_t *dev;
 550         __u8 *d;
 551         int status;
 552
 553         dev = urb->context;
 554         if (!dev)
 555                 return;
 556         switch (urb->status) {
 557         case 0:                 /* success */
 558                 break;
 559         case -ECONNRESET:       /* unlink */
 560         case -ENOENT:
 561         case -ESHUTDOWN:
 562                 return;
 563         /* -EPIPE:  should clear the halt */
 564         default:
 565                 info("%s: intr status %d", dev->netdev->name, urb->status);
 566                 goto resubmit;
 567         }
 568
 569         d = urb->transfer_buffer;
 570         if (d[0] & TSR_ERRORS) {
 571                 dev->stats.tx_errors++;
 572                 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
 573                         dev->stats.tx_aborted_errors++;
 574                 if (d[INT_TSR] & TSR_LCOL)
 575                         dev->stats.tx_window_errors++;
 576                 if (d[INT_TSR] & TSR_LOSS_CRS)
 577                         dev->stats.tx_carrier_errors++;
 578         }
 579         /* Report link status changes to the network stack */
 580         if ((d[INT_MSR] & MSR_LINK) == 0) {
 581                 if (netif_carrier_ok(dev->netdev)) {
 582                         netif_carrier_off(dev->netdev);
 583                         dbg("%s: LINK LOST\n", __func__);
 584                 }
 585         } else {
 586                 if (!netif_carrier_ok(dev->netdev)) {
 587                         netif_carrier_on(dev->netdev);
 588                         dbg("%s: LINK CAME BACK\n", __func__);
 589                 }
 590         }
 591
 592 resubmit:
 593         status = usb_submit_urb (urb, GFP_ATOMIC);
 594         if (status == -ENODEV)
 595                 netif_device_detach(dev->netdev);
 596         else if (status)
 597                 err ("can't resubmit intr, %s-%s/input0, status %d",
 598                                 dev->udev->bus->bus_name,
 599                                 dev->udev->devpath, status);
 600 }
 601
 602 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
 603 {
 604         rtl8150_t *dev = usb_get_intfdata(intf);
 605
 606         netif_device_detach(dev->netdev);
 607
 608         if (netif_running(dev->netdev)) {
 609                 usb_kill_urb(dev->rx_urb);
 610                 usb_kill_urb(dev->intr_urb);
 611         }
 612         return 0;
 613 }
 614
 615 static int rtl8150_resume(struct usb_interface *intf)
 616 {
 617         rtl8150_t *dev = usb_get_intfdata(intf);
 618
 619         netif_device_attach(dev->netdev);
 620         if (netif_running(dev->netdev)) {
 621                 dev->rx_urb->status = 0;
 622                 dev->rx_urb->actual_length = 0;
 623                 read_bulk_callback(dev->rx_urb);
 624
 625                 dev->intr_urb->status = 0;
 626                 dev->intr_urb->actual_length = 0;
 627                 intr_callback(dev->intr_urb);
 628         }
 629         return 0;
 630 }
 631
 632 /*
 633 **
 634 **      network related part of the code
 635 **
 636 */
 637
 638 static void fill_skb_pool(rtl8150_t *dev)
 639 {
 640         struct sk_buff *skb;
 641         int i;
 642
 643         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 644                 if (dev->rx_skb_pool[i])
 645                         continue;
 646                 skb = dev_alloc_skb(RTL8150_MTU + 2);
 647                 if (!skb) {
 648                         return;
 649                 }
 650                 skb->dev = dev->netdev;
 651                 skb_reserve(skb, 2);
 652                 dev->rx_skb_pool[i] = skb;
 653         }
 654 }
 655
 656 static void free_skb_pool(rtl8150_t *dev)
 657 {
 658         int i;
 659
 660         for (i = 0; i < RX_SKB_POOL_SIZE; i++)
 661                 if (dev->rx_skb_pool[i])
 662                         dev_kfree_skb(dev->rx_skb_pool[i]);
 663 }
 664
 665 static int enable_net_traffic(rtl8150_t * dev)
 666 {
 667         u8 cr, tcr, rcr, msr;
 668
 669         if (!rtl8150_reset(dev)) {
 670                 warn("%s - device reset failed", __FUNCTION__);
 671         }
 672         /* RCR bit7=1 attach Rx info at the end;  =0 HW CRC (which is broken) */
 673         rcr = 0x9e;
 674         dev->rx_creg = cpu_to_le16(rcr);
 675         tcr = 0xd8;
 676         cr = 0x0c;
 677         if (!(rcr & 0x80))
 678                 set_bit(RTL8150_HW_CRC, &dev->flags);
 679         set_registers(dev, RCR, 1, &rcr);
 680         set_registers(dev, TCR, 1, &tcr);
 681         set_registers(dev, CR, 1, &cr);
 682         get_registers(dev, MSR, 1, &msr);
 683
 684         return 0;
 685 }
 686
 687 static void disable_net_traffic(rtl8150_t * dev)
 688 {
 689         u8 cr;
 690
 691         get_registers(dev, CR, 1, &cr);
 692         cr &= 0xf3;
 693         set_registers(dev, CR, 1, &cr);
 694 }
 695
 696 static struct net_device_stats *rtl8150_netdev_stats(struct net_device *dev)
 697 {
 698         return &((rtl8150_t *)netdev_priv(dev))->stats;
 699 }
 700
 701 static void rtl8150_tx_timeout(struct net_device *netdev)
 702 {
 703         rtl8150_t *dev = netdev_priv(netdev);
 704         warn("%s: Tx timeout.", netdev->name);
 705         usb_unlink_urb(dev->tx_urb);
 706         dev->stats.tx_errors++;
 707 }
 708
 709 static void rtl8150_set_multicast(struct net_device *netdev)
 710 {
 711         rtl8150_t *dev = netdev_priv(netdev);
 712         netif_stop_queue(netdev);
 713         if (netdev->flags & IFF_PROMISC) {
 714                 dev->rx_creg |= cpu_to_le16(0x0001);
 715                 info("%s: promiscuous mode", netdev->name);
 716         } else if (netdev->mc_count ||
 717                    (netdev->flags & IFF_ALLMULTI)) {
 718                 dev->rx_creg &= cpu_to_le16(0xfffe);
 719                 dev->rx_creg |= cpu_to_le16(0x0002);
 720                 info("%s: allmulti set", netdev->name);
 721         } else {
 722                 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
 723                 dev->rx_creg &= cpu_to_le16(0x00fc);
 724         }
 725         async_set_registers(dev, RCR, 2);
 726         netif_wake_queue(netdev);
 727 }
 728
 729 static int rtl8150_start_xmit(struct sk_buff *skb, struct net_device *netdev)
 730 {
 731         rtl8150_t *dev = netdev_priv(netdev);
 732         int count, res;
 733
 734         netif_stop_queue(netdev);
 735         count = (skb->len < 60) ? 60 : skb->len;
 736         count = (count & 0x3f) ? count : count + 1;
 737         dev->tx_skb = skb;
 738         usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
 739                       skb->data, count, write_bulk_callback, dev);
 740         if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
 741                 /* Can we get/handle EPIPE here? */
 742                 if (res == -ENODEV)
 743                         netif_device_detach(dev->netdev);
 744                 else {
 745                         warn("failed tx_urb %d\n", res);
 746                         dev->stats.tx_errors++;
 747                         netif_start_queue(netdev);
 748                 }
 749         } else {
 750                 dev->stats.tx_packets++;
 751                 dev->stats.tx_bytes += skb->len;
 752                 netdev->trans_start = jiffies;
 753         }
 754
 755         return 0;
 756 }
 757
 758
 759 static void set_carrier(struct net_device *netdev)
 760 {
 761         rtl8150_t *dev = netdev_priv(netdev);
 762         short tmp;
 763
 764         get_registers(dev, CSCR, 2, &tmp);
 765         if (tmp & CSCR_LINK_STATUS)
 766                 netif_carrier_on(netdev);
 767         else
 768                 netif_carrier_off(netdev);
 769 }
 770
 771 static int rtl8150_open(struct net_device *netdev)
 772 {
 773         rtl8150_t *dev = netdev_priv(netdev);
 774         int res;
 775
 776         if (dev->rx_skb == NULL)
 777                 dev->rx_skb = pull_skb(dev);
 778         if (!dev->rx_skb)
 779                 return -ENOMEM;
 780
 781         set_registers(dev, IDR, 6, netdev->dev_addr);
 782
 783         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 784                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 785         if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
 786                 if (res == -ENODEV)
 787                         netif_device_detach(dev->netdev);
 788                 warn("%s: rx_urb submit failed: %d", __FUNCTION__, res);
 789                 return res;
 790         }
 791         usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
 792                      dev->intr_buff, INTBUFSIZE, intr_callback,
 793                      dev, dev->intr_interval);
 794         if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
 795                 if (res == -ENODEV)
 796                         netif_device_detach(dev->netdev);
 797                 warn("%s: intr_urb submit failed: %d", __FUNCTION__, res);
 798                 usb_kill_urb(dev->rx_urb);
 799                 return res;
 800         }
 801         enable_net_traffic(dev);
 802         set_carrier(netdev);
 803         netif_start_queue(netdev);
 804
 805         return res;
 806 }
 807
 808 static int rtl8150_close(struct net_device *netdev)
 809 {
 810         rtl8150_t *dev = netdev_priv(netdev);
 811         int res = 0;
 812
 813         netif_stop_queue(netdev);
 814         if (!test_bit(RTL8150_UNPLUG, &dev->flags))
 815                 disable_net_traffic(dev);
 816         unlink_all_urbs(dev);
 817
 818         return res;
 819 }
 820
 821 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
 822 {
 823         rtl8150_t *dev = netdev_priv(netdev);
 824
 825         strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
 826         strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
 827         usb_make_path(dev->udev, info->bus_info, sizeof info->bus_info);
 828 }
 829
 830 static int rtl8150_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
 831 {
 832         rtl8150_t *dev = netdev_priv(netdev);
 833         short lpa, bmcr;
 834
 835         ecmd->supported = (SUPPORTED_10baseT_Half |
 836                           SUPPORTED_10baseT_Full |
 837                           SUPPORTED_100baseT_Half |
 838                           SUPPORTED_100baseT_Full |
 839                           SUPPORTED_Autoneg |
 840                           SUPPORTED_TP | SUPPORTED_MII);
 841         ecmd->port = PORT_TP;
 842         ecmd->transceiver = XCVR_INTERNAL;
 843         ecmd->phy_address = dev->phy;
 844         get_registers(dev, BMCR, 2, &bmcr);
 845         get_registers(dev, ANLP, 2, &lpa);
 846         if (bmcr & BMCR_ANENABLE) {
 847                 ecmd->autoneg = AUTONEG_ENABLE;
 848                 ecmd->speed = (lpa & (LPA_100HALF | LPA_100FULL)) ?
 849                              SPEED_100 : SPEED_10;
 850                 if (ecmd->speed == SPEED_100)
 851                         ecmd->duplex = (lpa & LPA_100FULL) ?
 852                             DUPLEX_FULL : DUPLEX_HALF;
 853                 else
 854                         ecmd->duplex = (lpa & LPA_10FULL) ?
 855                             DUPLEX_FULL : DUPLEX_HALF;
 856         } else {
 857                 ecmd->autoneg = AUTONEG_DISABLE;
 858                 ecmd->speed = (bmcr & BMCR_SPEED100) ?
 859                     SPEED_100 : SPEED_10;
 860                 ecmd->duplex = (bmcr & BMCR_FULLDPLX) ?
 861                     DUPLEX_FULL : DUPLEX_HALF;
 862         }
 863         return 0;
 864 }
 865
 866 static struct ethtool_ops ops = {
 867         .get_drvinfo = rtl8150_get_drvinfo,
 868         .get_settings = rtl8150_get_settings,
 869         .get_link = ethtool_op_get_link
 870 };
 871
 872 static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 873 {
 874         rtl8150_t *dev = netdev_priv(netdev);
 875         u16 *data = (u16 *) & rq->ifr_ifru;
 876         int res = 0;
 877
 878         switch (cmd) {
 879         case SIOCDEVPRIVATE:
 880                 data[0] = dev->phy;
 881         case SIOCDEVPRIVATE + 1:
 882                 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
 883                 break;
 884         case SIOCDEVPRIVATE + 2:
 885                 if (!capable(CAP_NET_ADMIN))
 886                         return -EPERM;
 887                 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
 888                 break;
 889         default:
 890                 res = -EOPNOTSUPP;
 891         }
 892
 893         return res;
 894 }
 895
 896 static int rtl8150_probe(struct usb_interface *intf,
 897                          const struct usb_device_id *id)
 898 {
 899         struct usb_device *udev = interface_to_usbdev(intf);
 900         rtl8150_t *dev;
 901         struct net_device *netdev;
 902
 903         netdev = alloc_etherdev(sizeof(rtl8150_t));
 904         if (!netdev) {
 905                 err("Out of memory");
 906                 return -ENOMEM;
 907         }
 908
 909         dev = netdev_priv(netdev);
 910         memset(dev, 0, sizeof(rtl8150_t));
 911
 912         dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
 913         if (!dev->intr_buff) {
 914                 free_netdev(netdev);
 915                 return -ENOMEM;
 916         }
 917
 918         tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
 919         spin_lock_init(&dev->rx_pool_lock);
 920
 921         dev->udev = udev;
 922         dev->netdev = netdev;
 923         SET_MODULE_OWNER(netdev);
 924         netdev->open = rtl8150_open;
 925         netdev->stop = rtl8150_close;
 926         netdev->do_ioctl = rtl8150_ioctl;
 927         netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
 928         netdev->tx_timeout = rtl8150_tx_timeout;
 929         netdev->hard_start_xmit = rtl8150_start_xmit;
 930         netdev->set_multicast_list = rtl8150_set_multicast;
 931         netdev->set_mac_address = rtl8150_set_mac_address;
 932         netdev->get_stats = rtl8150_netdev_stats;
 933         netdev->mtu = RTL8150_MTU;
 934         SET_ETHTOOL_OPS(netdev, &ops);
 935         dev->intr_interval = 100;       /* 100ms */
 936
 937         if (!alloc_all_urbs(dev)) {
 938                 err("out of memory");
 939                 goto out;
 940         }
 941         if (!rtl8150_reset(dev)) {
 942                 err("couldn't reset the device");
 943                 goto out1;
 944         }
 945         fill_skb_pool(dev);
 946         set_ethernet_addr(dev);
 947
 948         usb_set_intfdata(intf, dev);
 949         SET_NETDEV_DEV(netdev, &intf->dev);
 950         if (register_netdev(netdev) != 0) {
 951                 err("couldn't register the device");
 952                 goto out2;
 953         }
 954
 955         info("%s: rtl8150 is detected", netdev->name);
 956
 957         return 0;
 958
 959 out2:
 960         usb_set_intfdata(intf, NULL);
 961         free_skb_pool(dev);
 962 out1:
 963         free_all_urbs(dev);
 964 out:
 965         kfree(dev->intr_buff);
 966         free_netdev(netdev);
 967         return -EIO;
 968 }
 969
 970 static void rtl8150_disconnect(struct usb_interface *intf)
 971 {
 972         rtl8150_t *dev = usb_get_intfdata(intf);
 973
 974         usb_set_intfdata(intf, NULL);
 975         if (dev) {
 976                 set_bit(RTL8150_UNPLUG, &dev->flags);
 977                 tasklet_disable(&dev->tl);
 978                 tasklet_kill(&dev->tl);
 979                 unregister_netdev(dev->netdev);
 980                 unlink_all_urbs(dev);
 981                 free_all_urbs(dev);
 982                 free_skb_pool(dev);
 983                 if (dev->rx_skb)
 984                         dev_kfree_skb(dev->rx_skb);
 985                 kfree(dev->intr_buff);
 986                 free_netdev(dev->netdev);
 987         }
 988 }
 989
 990 static int __init usb_rtl8150_init(void)
 991 {
 992         info(DRIVER_DESC " " DRIVER_VERSION);
 993         return usb_register(&rtl8150_driver);
 994 }
 995
 996 static void __exit usb_rtl8150_exit(void)
 997 {
 998         usb_deregister(&rtl8150_driver);
 999 }
1000
1001 module_init(usb_rtl8150_init);
1002 module_exit(usb_rtl8150_exit);
1003
1004 MODULE_AUTHOR(DRIVER_AUTHOR);
1005 MODULE_DESCRIPTION(DRIVER_DESC);
1006 MODULE_LICENSE("GPL");