drivers/net/usb/rtl8150.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  Copyright (c) 2002 Petko Manolov (petkan@users.sourceforge.net)
   4  */
   5
   6 #include <linux/signal.h>
   7 #include <linux/slab.h>
   8 #include <linux/module.h>
   9 #include <linux/netdevice.h>
  10 #include <linux/etherdevice.h>
  11 #include <linux/mii.h>
  12 #include <linux/ethtool.h>
  13 #include <linux/usb.h>
  14 #include <linux/uaccess.h>
  15
  16 /* Version Information */
  17 #define DRIVER_VERSION "v0.6.2 (2004/08/27)"
  18 #define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>"
  19 #define DRIVER_DESC "rtl8150 based usb-ethernet driver"
  20
  21 #define IDR                     0x0120
  22 #define MAR                     0x0126
  23 #define CR                      0x012e
  24 #define TCR                     0x012f
  25 #define RCR                     0x0130
  26 #define TSR                     0x0132
  27 #define RSR                     0x0133
  28 #define CON0                    0x0135
  29 #define CON1                    0x0136
  30 #define MSR                     0x0137
  31 #define PHYADD                  0x0138
  32 #define PHYDAT                  0x0139
  33 #define PHYCNT                  0x013b
  34 #define GPPC                    0x013d
  35 #define BMCR                    0x0140
  36 #define BMSR                    0x0142
  37 #define ANAR                    0x0144
  38 #define ANLP                    0x0146
  39 #define AER                     0x0148
  40 #define CSCR                    0x014C  /* This one has the link status */
  41 #define CSCR_LINK_STATUS        (1 << 3)
  42
  43 #define IDR_EEPROM              0x1202
  44
  45 #define PHY_READ                0
  46 #define PHY_WRITE               0x20
  47 #define PHY_GO                  0x40
  48
  49 #define MII_TIMEOUT             10
  50 #define INTBUFSIZE              8
  51
  52 #define RTL8150_REQT_READ       0xc0
  53 #define RTL8150_REQT_WRITE      0x40
  54 #define RTL8150_REQ_GET_REGS    0x05
  55 #define RTL8150_REQ_SET_REGS    0x05
  56
  57
  58 /* Transmit status register errors */
  59 #define TSR_ECOL                (1<<5)
  60 #define TSR_LCOL                (1<<4)
  61 #define TSR_LOSS_CRS            (1<<3)
  62 #define TSR_JBR                 (1<<2)
  63 #define TSR_ERRORS              (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
  64 /* Receive status register errors */
  65 #define RSR_CRC                 (1<<2)
  66 #define RSR_FAE                 (1<<1)
  67 #define RSR_ERRORS              (RSR_CRC | RSR_FAE)
  68
  69 /* Media status register definitions */
  70 #define MSR_DUPLEX              (1<<4)
  71 #define MSR_SPEED               (1<<3)
  72 #define MSR_LINK                (1<<2)
  73
  74 /* Interrupt pipe data */
  75 #define INT_TSR                 0x00
  76 #define INT_RSR                 0x01
  77 #define INT_MSR                 0x02
  78 #define INT_WAKSR               0x03
  79 #define INT_TXOK_CNT            0x04
  80 #define INT_RXLOST_CNT          0x05
  81 #define INT_CRERR_CNT           0x06
  82 #define INT_COL_CNT             0x07
  83
  84
  85 #define RTL8150_MTU             1540
  86 #define RTL8150_TX_TIMEOUT      (HZ)
  87 #define RX_SKB_POOL_SIZE        4
  88
  89 /* rtl8150 flags */
  90 #define RTL8150_HW_CRC          0
  91 #define RX_REG_SET              1
  92 #define RTL8150_UNPLUG          2
  93 #define RX_URB_FAIL             3
  94
  95 /* Define these values to match your device */
  96 #define VENDOR_ID_REALTEK               0x0bda
  97 #define VENDOR_ID_MELCO                 0x0411
  98 #define VENDOR_ID_MICRONET              0x3980
  99 #define VENDOR_ID_LONGSHINE             0x07b8
 100 #define VENDOR_ID_OQO                   0x1557
 101 #define VENDOR_ID_ZYXEL                 0x0586
 102
 103 #define PRODUCT_ID_RTL8150              0x8150
 104 #define PRODUCT_ID_LUAKTX               0x0012
 105 #define PRODUCT_ID_LCS8138TX            0x401a
 106 #define PRODUCT_ID_SP128AR              0x0003
 107 #define PRODUCT_ID_PRESTIGE             0x401a
 108
 109 #undef  EEPROM_WRITE
 110
 111 /* table of devices that work with this driver */
 112 static const struct usb_device_id rtl8150_table[] = {
 113         {USB_DEVICE(VENDOR_ID_REALTEK, PRODUCT_ID_RTL8150)},
 114         {USB_DEVICE(VENDOR_ID_MELCO, PRODUCT_ID_LUAKTX)},
 115         {USB_DEVICE(VENDOR_ID_MICRONET, PRODUCT_ID_SP128AR)},
 116         {USB_DEVICE(VENDOR_ID_LONGSHINE, PRODUCT_ID_LCS8138TX)},
 117         {USB_DEVICE(VENDOR_ID_OQO, PRODUCT_ID_RTL8150)},
 118         {USB_DEVICE(VENDOR_ID_ZYXEL, PRODUCT_ID_PRESTIGE)},
 119         {}
 120 };
 121
 122 MODULE_DEVICE_TABLE(usb, rtl8150_table);
 123
 124 struct rtl8150 {
 125         unsigned long flags;
 126         struct usb_device *udev;
 127         struct tasklet_struct tl;
 128         struct net_device *netdev;
 129         struct urb *rx_urb, *tx_urb, *intr_urb;
 130         struct sk_buff *tx_skb, *rx_skb;
 131         struct sk_buff *rx_skb_pool[RX_SKB_POOL_SIZE];
 132         spinlock_t rx_pool_lock;
 133         struct usb_ctrlrequest dr;
 134         int intr_interval;
 135         u8 *intr_buff;
 136         u8 phy;
 137 };
 138
 139 typedef struct rtl8150 rtl8150_t;
 140
 141 struct async_req {
 142         struct usb_ctrlrequest dr;
 143         u16 rx_creg;
 144 };
 145
 146 static const char driver_name [] = "rtl8150";
 147
 148 /*
 149 **
 150 **      device related part of the code
 151 **
 152 */
 153 static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
 154 {
 155         void *buf;
 156         int ret;
 157
 158         buf = kmalloc(size, GFP_NOIO);
 159         if (!buf)
 160                 return -ENOMEM;
 161
 162         ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
 163                               RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
 164                               indx, 0, buf, size, 500);
 165         if (ret > 0 && ret <= size)
 166                 memcpy(data, buf, ret);
 167         kfree(buf);
 168         return ret;
 169 }
 170
 171 static int set_registers(rtl8150_t * dev, u16 indx, u16 size, const void *data)
 172 {
 173         void *buf;
 174         int ret;
 175
 176         buf = kmemdup(data, size, GFP_NOIO);
 177         if (!buf)
 178                 return -ENOMEM;
 179
 180         ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
 181                               RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
 182                               indx, 0, buf, size, 500);
 183         kfree(buf);
 184         return ret;
 185 }
 186
 187 static void async_set_reg_cb(struct urb *urb)
 188 {
 189         struct async_req *req = (struct async_req *)urb->context;
 190         int status = urb->status;
 191
 192         if (status < 0)
 193                 dev_dbg(&urb->dev->dev, "%s failed with %d", __func__, status);
 194         kfree(req);
 195         usb_free_urb(urb);
 196 }
 197
 198 static int async_set_registers(rtl8150_t *dev, u16 indx, u16 size, u16 reg)
 199 {
 200         int res = -ENOMEM;
 201         struct urb *async_urb;
 202         struct async_req *req;
 203
 204         req = kmalloc(sizeof(struct async_req), GFP_ATOMIC);
 205         if (req == NULL)
 206                 return res;
 207         async_urb = usb_alloc_urb(0, GFP_ATOMIC);
 208         if (async_urb == NULL) {
 209                 kfree(req);
 210                 return res;
 211         }
 212         req->rx_creg = cpu_to_le16(reg);
 213         req->dr.bRequestType = RTL8150_REQT_WRITE;
 214         req->dr.bRequest = RTL8150_REQ_SET_REGS;
 215         req->dr.wIndex = 0;
 216         req->dr.wValue = cpu_to_le16(indx);
 217         req->dr.wLength = cpu_to_le16(size);
 218         usb_fill_control_urb(async_urb, dev->udev,
 219                              usb_sndctrlpipe(dev->udev, 0), (void *)&req->dr,
 220                              &req->rx_creg, size, async_set_reg_cb, req);
 221         res = usb_submit_urb(async_urb, GFP_ATOMIC);
 222         if (res) {
 223                 if (res == -ENODEV)
 224                         netif_device_detach(dev->netdev);
 225                 dev_err(&dev->udev->dev, "%s failed with %d\n", __func__, res);
 226         }
 227         return res;
 228 }
 229
 230 static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
 231 {
 232         int i;
 233         u8 data[3], tmp;
 234
 235         data[0] = phy;
 236         data[1] = data[2] = 0;
 237         tmp = indx | PHY_READ | PHY_GO;
 238         i = 0;
 239
 240         set_registers(dev, PHYADD, sizeof(data), data);
 241         set_registers(dev, PHYCNT, 1, &tmp);
 242         do {
 243                 get_registers(dev, PHYCNT, 1, data);
 244         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 245
 246         if (i <= MII_TIMEOUT) {
 247                 get_registers(dev, PHYDAT, 2, data);
 248                 *reg = data[0] | (data[1] << 8);
 249                 return 0;
 250         } else
 251                 return 1;
 252 }
 253
 254 static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
 255 {
 256         int i;
 257         u8 data[3], tmp;
 258
 259         data[0] = phy;
 260         data[1] = reg & 0xff;
 261         data[2] = (reg >> 8) & 0xff;
 262         tmp = indx | PHY_WRITE | PHY_GO;
 263         i = 0;
 264
 265         set_registers(dev, PHYADD, sizeof(data), data);
 266         set_registers(dev, PHYCNT, 1, &tmp);
 267         do {
 268                 get_registers(dev, PHYCNT, 1, data);
 269         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 270
 271         if (i <= MII_TIMEOUT)
 272                 return 0;
 273         else
 274                 return 1;
 275 }
 276
 277 static inline void set_ethernet_addr(rtl8150_t * dev)
 278 {
 279         u8 node_id[6];
 280
 281         get_registers(dev, IDR, sizeof(node_id), node_id);
 282         memcpy(dev->netdev->dev_addr, node_id, sizeof(node_id));
 283 }
 284
 285 static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
 286 {
 287         struct sockaddr *addr = p;
 288         rtl8150_t *dev = netdev_priv(netdev);
 289
 290         if (netif_running(netdev))
 291                 return -EBUSY;
 292
 293         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 294         netdev_dbg(netdev, "Setting MAC address to %pM\n", netdev->dev_addr);
 295         /* Set the IDR registers. */
 296         set_registers(dev, IDR, netdev->addr_len, netdev->dev_addr);
 297 #ifdef EEPROM_WRITE
 298         {
 299         int i;
 300         u8 cr;
 301         /* Get the CR contents. */
 302         get_registers(dev, CR, 1, &cr);
 303         /* Set the WEPROM bit (eeprom write enable). */
 304         cr |= 0x20;
 305         set_registers(dev, CR, 1, &cr);
 306         /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
 307            so we need to split them up. */
 308         for (i = 0; i * 2 < netdev->addr_len; i++) {
 309                 set_registers(dev, IDR_EEPROM + (i * 2), 2,
 310                 netdev->dev_addr + (i * 2));
 311         }
 312         /* Clear the WEPROM bit (preventing accidental eeprom writes). */
 313         cr &= 0xdf;
 314         set_registers(dev, CR, 1, &cr);
 315         }
 316 #endif
 317         return 0;
 318 }
 319
 320 static int rtl8150_reset(rtl8150_t * dev)
 321 {
 322         u8 data = 0x10;
 323         int i = HZ;
 324
 325         set_registers(dev, CR, 1, &data);
 326         do {
 327                 get_registers(dev, CR, 1, &data);
 328         } while ((data & 0x10) && --i);
 329
 330         return (i > 0) ? 1 : 0;
 331 }
 332
 333 static int alloc_all_urbs(rtl8150_t * dev)
 334 {
 335         dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 336         if (!dev->rx_urb)
 337                 return 0;
 338         dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 339         if (!dev->tx_urb) {
 340                 usb_free_urb(dev->rx_urb);
 341                 return 0;
 342         }
 343         dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
 344         if (!dev->intr_urb) {
 345                 usb_free_urb(dev->rx_urb);
 346                 usb_free_urb(dev->tx_urb);
 347                 return 0;
 348         }
 349
 350         return 1;
 351 }
 352
 353 static void free_all_urbs(rtl8150_t * dev)
 354 {
 355         usb_free_urb(dev->rx_urb);
 356         usb_free_urb(dev->tx_urb);
 357         usb_free_urb(dev->intr_urb);
 358 }
 359
 360 static void unlink_all_urbs(rtl8150_t * dev)
 361 {
 362         usb_kill_urb(dev->rx_urb);
 363         usb_kill_urb(dev->tx_urb);
 364         usb_kill_urb(dev->intr_urb);
 365 }
 366
 367 static inline struct sk_buff *pull_skb(rtl8150_t *dev)
 368 {
 369         struct sk_buff *skb;
 370         int i;
 371
 372         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 373                 if (dev->rx_skb_pool[i]) {
 374                         skb = dev->rx_skb_pool[i];
 375                         dev->rx_skb_pool[i] = NULL;
 376                         return skb;
 377                 }
 378         }
 379         return NULL;
 380 }
 381
 382 static void read_bulk_callback(struct urb *urb)
 383 {
 384         rtl8150_t *dev;
 385         unsigned pkt_len, res;
 386         struct sk_buff *skb;
 387         struct net_device *netdev;
 388         int status = urb->status;
 389         int result;
 390         unsigned long flags;
 391
 392         dev = urb->context;
 393         if (!dev)
 394                 return;
 395         if (test_bit(RTL8150_UNPLUG, &dev->flags))
 396                 return;
 397         netdev = dev->netdev;
 398         if (!netif_device_present(netdev))
 399                 return;
 400
 401         switch (status) {
 402         case 0:
 403                 break;
 404         case -ENOENT:
 405                 return; /* the urb is in unlink state */
 406         case -ETIME:
 407                 if (printk_ratelimit())
 408                         dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
 409                 goto goon;
 410         default:
 411                 if (printk_ratelimit())
 412                         dev_warn(&urb->dev->dev, "Rx status %d\n", status);
 413                 goto goon;
 414         }
 415
 416         if (!dev->rx_skb)
 417                 goto resched;
 418         /* protect against short packets (tell me why we got some?!?) */
 419         if (urb->actual_length < 4)
 420                 goto goon;
 421
 422         res = urb->actual_length;
 423         pkt_len = res - 4;
 424
 425         skb_put(dev->rx_skb, pkt_len);
 426         dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
 427         netif_rx(dev->rx_skb);
 428         netdev->stats.rx_packets++;
 429         netdev->stats.rx_bytes += pkt_len;
 430
 431         spin_lock_irqsave(&dev->rx_pool_lock, flags);
 432         skb = pull_skb(dev);
 433         spin_unlock_irqrestore(&dev->rx_pool_lock, flags);
 434         if (!skb)
 435                 goto resched;
 436
 437         dev->rx_skb = skb;
 438 goon:
 439         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 440                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 441         result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
 442         if (result == -ENODEV)
 443                 netif_device_detach(dev->netdev);
 444         else if (result) {
 445                 set_bit(RX_URB_FAIL, &dev->flags);
 446                 goto resched;
 447         } else {
 448                 clear_bit(RX_URB_FAIL, &dev->flags);
 449         }
 450
 451         return;
 452 resched:
 453         tasklet_schedule(&dev->tl);
 454 }
 455
 456 static void write_bulk_callback(struct urb *urb)
 457 {
 458         rtl8150_t *dev;
 459         int status = urb->status;
 460
 461         dev = urb->context;
 462         if (!dev)
 463                 return;
 464         dev_kfree_skb_irq(dev->tx_skb);
 465         if (!netif_device_present(dev->netdev))
 466                 return;
 467         if (status)
 468                 dev_info(&urb->dev->dev, "%s: Tx status %d\n",
 469                          dev->netdev->name, status);
 470         netif_trans_update(dev->netdev);
 471         netif_wake_queue(dev->netdev);
 472 }
 473
 474 static void intr_callback(struct urb *urb)
 475 {
 476         rtl8150_t *dev;
 477         __u8 *d;
 478         int status = urb->status;
 479         int res;
 480
 481         dev = urb->context;
 482         if (!dev)
 483                 return;
 484         switch (status) {
 485         case 0:                 /* success */
 486                 break;
 487         case -ECONNRESET:       /* unlink */
 488         case -ENOENT:
 489         case -ESHUTDOWN:
 490                 return;
 491         /* -EPIPE:  should clear the halt */
 492         default:
 493                 dev_info(&urb->dev->dev, "%s: intr status %d\n",
 494                          dev->netdev->name, status);
 495                 goto resubmit;
 496         }
 497
 498         d = urb->transfer_buffer;
 499         if (d[0] & TSR_ERRORS) {
 500                 dev->netdev->stats.tx_errors++;
 501                 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
 502                         dev->netdev->stats.tx_aborted_errors++;
 503                 if (d[INT_TSR] & TSR_LCOL)
 504                         dev->netdev->stats.tx_window_errors++;
 505                 if (d[INT_TSR] & TSR_LOSS_CRS)
 506                         dev->netdev->stats.tx_carrier_errors++;
 507         }
 508         /* Report link status changes to the network stack */
 509         if ((d[INT_MSR] & MSR_LINK) == 0) {
 510                 if (netif_carrier_ok(dev->netdev)) {
 511                         netif_carrier_off(dev->netdev);
 512                         netdev_dbg(dev->netdev, "%s: LINK LOST\n", __func__);
 513                 }
 514         } else {
 515                 if (!netif_carrier_ok(dev->netdev)) {
 516                         netif_carrier_on(dev->netdev);
 517                         netdev_dbg(dev->netdev, "%s: LINK CAME BACK\n", __func__);
 518                 }
 519         }
 520
 521 resubmit:
 522         res = usb_submit_urb (urb, GFP_ATOMIC);
 523         if (res == -ENODEV)
 524                 netif_device_detach(dev->netdev);
 525         else if (res)
 526                 dev_err(&dev->udev->dev,
 527                         "can't resubmit intr, %s-%s/input0, status %d\n",
 528                         dev->udev->bus->bus_name, dev->udev->devpath, res);
 529 }
 530
 531 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
 532 {
 533         rtl8150_t *dev = usb_get_intfdata(intf);
 534
 535         netif_device_detach(dev->netdev);
 536
 537         if (netif_running(dev->netdev)) {
 538                 usb_kill_urb(dev->rx_urb);
 539                 usb_kill_urb(dev->intr_urb);
 540         }
 541         return 0;
 542 }
 543
 544 static int rtl8150_resume(struct usb_interface *intf)
 545 {
 546         rtl8150_t *dev = usb_get_intfdata(intf);
 547
 548         netif_device_attach(dev->netdev);
 549         if (netif_running(dev->netdev)) {
 550                 dev->rx_urb->status = 0;
 551                 dev->rx_urb->actual_length = 0;
 552                 read_bulk_callback(dev->rx_urb);
 553
 554                 dev->intr_urb->status = 0;
 555                 dev->intr_urb->actual_length = 0;
 556                 intr_callback(dev->intr_urb);
 557         }
 558         return 0;
 559 }
 560
 561 /*
 562 **
 563 **      network related part of the code
 564 **
 565 */
 566
 567 static void fill_skb_pool(rtl8150_t *dev)
 568 {
 569         struct sk_buff *skb;
 570         int i;
 571
 572         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 573                 if (dev->rx_skb_pool[i])
 574                         continue;
 575                 skb = dev_alloc_skb(RTL8150_MTU + 2);
 576                 if (!skb) {
 577                         return;
 578                 }
 579                 skb_reserve(skb, 2);
 580                 dev->rx_skb_pool[i] = skb;
 581         }
 582 }
 583
 584 static void free_skb_pool(rtl8150_t *dev)
 585 {
 586         int i;
 587
 588         for (i = 0; i < RX_SKB_POOL_SIZE; i++)
 589                 dev_kfree_skb(dev->rx_skb_pool[i]);
 590 }
 591
 592 static void rx_fixup(unsigned long data)
 593 {
 594         struct rtl8150 *dev = (struct rtl8150 *)data;
 595         struct sk_buff *skb;
 596         int status;
 597
 598         spin_lock_irq(&dev->rx_pool_lock);
 599         fill_skb_pool(dev);
 600         spin_unlock_irq(&dev->rx_pool_lock);
 601         if (test_bit(RX_URB_FAIL, &dev->flags))
 602                 if (dev->rx_skb)
 603                         goto try_again;
 604         spin_lock_irq(&dev->rx_pool_lock);
 605         skb = pull_skb(dev);
 606         spin_unlock_irq(&dev->rx_pool_lock);
 607         if (skb == NULL)
 608                 goto tlsched;
 609         dev->rx_skb = skb;
 610         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 611                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 612 try_again:
 613         status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
 614         if (status == -ENODEV) {
 615                 netif_device_detach(dev->netdev);
 616         } else if (status) {
 617                 set_bit(RX_URB_FAIL, &dev->flags);
 618                 goto tlsched;
 619         } else {
 620                 clear_bit(RX_URB_FAIL, &dev->flags);
 621         }
 622
 623         return;
 624 tlsched:
 625         tasklet_schedule(&dev->tl);
 626 }
 627
 628 static int enable_net_traffic(rtl8150_t * dev)
 629 {
 630         u8 cr, tcr, rcr, msr;
 631
 632         if (!rtl8150_reset(dev)) {
 633                 dev_warn(&dev->udev->dev, "device reset failed\n");
 634         }
 635         /* RCR bit7=1 attach Rx info at the end;  =0 HW CRC (which is broken) */
 636         rcr = 0x9e;
 637         tcr = 0xd8;
 638         cr = 0x0c;
 639         if (!(rcr & 0x80))
 640                 set_bit(RTL8150_HW_CRC, &dev->flags);
 641         set_registers(dev, RCR, 1, &rcr);
 642         set_registers(dev, TCR, 1, &tcr);
 643         set_registers(dev, CR, 1, &cr);
 644         get_registers(dev, MSR, 1, &msr);
 645
 646         return 0;
 647 }
 648
 649 static void disable_net_traffic(rtl8150_t * dev)
 650 {
 651         u8 cr;
 652
 653         get_registers(dev, CR, 1, &cr);
 654         cr &= 0xf3;
 655         set_registers(dev, CR, 1, &cr);
 656 }
 657
 658 static void rtl8150_tx_timeout(struct net_device *netdev, unsigned int txqueue)
 659 {
 660         rtl8150_t *dev = netdev_priv(netdev);
 661         dev_warn(&netdev->dev, "Tx timeout.\n");
 662         usb_unlink_urb(dev->tx_urb);
 663         netdev->stats.tx_errors++;
 664 }
 665
 666 static void rtl8150_set_multicast(struct net_device *netdev)
 667 {
 668         rtl8150_t *dev = netdev_priv(netdev);
 669         u16 rx_creg = 0x9e;
 670
 671         netif_stop_queue(netdev);
 672         if (netdev->flags & IFF_PROMISC) {
 673                 rx_creg |= 0x0001;
 674                 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
 675         } else if (!netdev_mc_empty(netdev) ||
 676                    (netdev->flags & IFF_ALLMULTI)) {
 677                 rx_creg &= 0xfffe;
 678                 rx_creg |= 0x0002;
 679                 dev_dbg(&netdev->dev, "%s: allmulti set\n", netdev->name);
 680         } else {
 681                 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
 682                 rx_creg &= 0x00fc;
 683         }
 684         async_set_registers(dev, RCR, sizeof(rx_creg), rx_creg);
 685         netif_wake_queue(netdev);
 686 }
 687
 688 static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb,
 689                                             struct net_device *netdev)
 690 {
 691         rtl8150_t *dev = netdev_priv(netdev);
 692         int count, res;
 693
 694         netif_stop_queue(netdev);
 695         count = (skb->len < 60) ? 60 : skb->len;
 696         count = (count & 0x3f) ? count : count + 1;
 697         dev->tx_skb = skb;
 698         usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
 699                       skb->data, count, write_bulk_callback, dev);
 700         if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
 701                 /* Can we get/handle EPIPE here? */
 702                 if (res == -ENODEV)
 703                         netif_device_detach(dev->netdev);
 704                 else {
 705                         dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
 706                         netdev->stats.tx_errors++;
 707                         netif_start_queue(netdev);
 708                 }
 709         } else {
 710                 netdev->stats.tx_packets++;
 711                 netdev->stats.tx_bytes += skb->len;
 712                 netif_trans_update(netdev);
 713         }
 714
 715         return NETDEV_TX_OK;
 716 }
 717
 718
 719 static void set_carrier(struct net_device *netdev)
 720 {
 721         rtl8150_t *dev = netdev_priv(netdev);
 722         short tmp;
 723
 724         get_registers(dev, CSCR, 2, &tmp);
 725         if (tmp & CSCR_LINK_STATUS)
 726                 netif_carrier_on(netdev);
 727         else
 728                 netif_carrier_off(netdev);
 729 }
 730
 731 static int rtl8150_open(struct net_device *netdev)
 732 {
 733         rtl8150_t *dev = netdev_priv(netdev);
 734         int res;
 735
 736         if (dev->rx_skb == NULL)
 737                 dev->rx_skb = pull_skb(dev);
 738         if (!dev->rx_skb)
 739                 return -ENOMEM;
 740
 741         set_registers(dev, IDR, 6, netdev->dev_addr);
 742
 743         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 744                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 745         if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
 746                 if (res == -ENODEV)
 747                         netif_device_detach(dev->netdev);
 748                 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
 749                 return res;
 750         }
 751         usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
 752                      dev->intr_buff, INTBUFSIZE, intr_callback,
 753                      dev, dev->intr_interval);
 754         if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
 755                 if (res == -ENODEV)
 756                         netif_device_detach(dev->netdev);
 757                 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
 758                 usb_kill_urb(dev->rx_urb);
 759                 return res;
 760         }
 761         enable_net_traffic(dev);
 762         set_carrier(netdev);
 763         netif_start_queue(netdev);
 764
 765         return res;
 766 }
 767
 768 static int rtl8150_close(struct net_device *netdev)
 769 {
 770         rtl8150_t *dev = netdev_priv(netdev);
 771
 772         netif_stop_queue(netdev);
 773         if (!test_bit(RTL8150_UNPLUG, &dev->flags))
 774                 disable_net_traffic(dev);
 775         unlink_all_urbs(dev);
 776
 777         return 0;
 778 }
 779
 780 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
 781 {
 782         rtl8150_t *dev = netdev_priv(netdev);
 783
 784         strlcpy(info->driver, driver_name, sizeof(info->driver));
 785         strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
 786         usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info));
 787 }
 788
 789 static int rtl8150_get_link_ksettings(struct net_device *netdev,
 790                                       struct ethtool_link_ksettings *ecmd)
 791 {
 792         rtl8150_t *dev = netdev_priv(netdev);
 793         short lpa, bmcr;
 794         u32 supported;
 795
 796         supported = (SUPPORTED_10baseT_Half |
 797                           SUPPORTED_10baseT_Full |
 798                           SUPPORTED_100baseT_Half |
 799                           SUPPORTED_100baseT_Full |
 800                           SUPPORTED_Autoneg |
 801                           SUPPORTED_TP | SUPPORTED_MII);
 802         ecmd->base.port = PORT_TP;
 803         ecmd->base.phy_address = dev->phy;
 804         get_registers(dev, BMCR, 2, &bmcr);
 805         get_registers(dev, ANLP, 2, &lpa);
 806         if (bmcr & BMCR_ANENABLE) {
 807                 u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ?
 808                              SPEED_100 : SPEED_10);
 809                 ecmd->base.speed = speed;
 810                 ecmd->base.autoneg = AUTONEG_ENABLE;
 811                 if (speed == SPEED_100)
 812                         ecmd->base.duplex = (lpa & LPA_100FULL) ?
 813                             DUPLEX_FULL : DUPLEX_HALF;
 814                 else
 815                         ecmd->base.duplex = (lpa & LPA_10FULL) ?
 816                             DUPLEX_FULL : DUPLEX_HALF;
 817         } else {
 818                 ecmd->base.autoneg = AUTONEG_DISABLE;
 819                 ecmd->base.speed = ((bmcr & BMCR_SPEED100) ?
 820                                              SPEED_100 : SPEED_10);
 821                 ecmd->base.duplex = (bmcr & BMCR_FULLDPLX) ?
 822                     DUPLEX_FULL : DUPLEX_HALF;
 823         }
 824
 825         ethtool_convert_legacy_u32_to_link_mode(ecmd->link_modes.supported,
 826                                                 supported);
 827
 828         return 0;
 829 }
 830
 831 static const struct ethtool_ops ops = {
 832         .get_drvinfo = rtl8150_get_drvinfo,
 833         .get_link = ethtool_op_get_link,
 834         .get_link_ksettings = rtl8150_get_link_ksettings,
 835 };
 836
 837 static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 838 {
 839         rtl8150_t *dev = netdev_priv(netdev);
 840         u16 *data = (u16 *) & rq->ifr_ifru;
 841         int res = 0;
 842
 843         switch (cmd) {
 844         case SIOCDEVPRIVATE:
 845                 data[0] = dev->phy;
 846                 /* fall through */
 847         case SIOCDEVPRIVATE + 1:
 848                 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
 849                 break;
 850         case SIOCDEVPRIVATE + 2:
 851                 if (!capable(CAP_NET_ADMIN))
 852                         return -EPERM;
 853                 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
 854                 break;
 855         default:
 856                 res = -EOPNOTSUPP;
 857         }
 858
 859         return res;
 860 }
 861
 862 static const struct net_device_ops rtl8150_netdev_ops = {
 863         .ndo_open               = rtl8150_open,
 864         .ndo_stop               = rtl8150_close,
 865         .ndo_do_ioctl           = rtl8150_ioctl,
 866         .ndo_start_xmit         = rtl8150_start_xmit,
 867         .ndo_tx_timeout         = rtl8150_tx_timeout,
 868         .ndo_set_rx_mode        = rtl8150_set_multicast,
 869         .ndo_set_mac_address    = rtl8150_set_mac_address,
 870
 871         .ndo_validate_addr      = eth_validate_addr,
 872 };
 873
 874 static int rtl8150_probe(struct usb_interface *intf,
 875                          const struct usb_device_id *id)
 876 {
 877         struct usb_device *udev = interface_to_usbdev(intf);
 878         rtl8150_t *dev;
 879         struct net_device *netdev;
 880
 881         netdev = alloc_etherdev(sizeof(rtl8150_t));
 882         if (!netdev)
 883                 return -ENOMEM;
 884
 885         dev = netdev_priv(netdev);
 886
 887         dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
 888         if (!dev->intr_buff) {
 889                 free_netdev(netdev);
 890                 return -ENOMEM;
 891         }
 892
 893         tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
 894         spin_lock_init(&dev->rx_pool_lock);
 895
 896         dev->udev = udev;
 897         dev->netdev = netdev;
 898         netdev->netdev_ops = &rtl8150_netdev_ops;
 899         netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
 900         netdev->ethtool_ops = &ops;
 901         dev->intr_interval = 100;       /* 100ms */
 902
 903         if (!alloc_all_urbs(dev)) {
 904                 dev_err(&intf->dev, "out of memory\n");
 905                 goto out;
 906         }
 907         if (!rtl8150_reset(dev)) {
 908                 dev_err(&intf->dev, "couldn't reset the device\n");
 909                 goto out1;
 910         }
 911         fill_skb_pool(dev);
 912         set_ethernet_addr(dev);
 913
 914         usb_set_intfdata(intf, dev);
 915         SET_NETDEV_DEV(netdev, &intf->dev);
 916         if (register_netdev(netdev) != 0) {
 917                 dev_err(&intf->dev, "couldn't register the device\n");
 918                 goto out2;
 919         }
 920
 921         dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
 922
 923         return 0;
 924
 925 out2:
 926         usb_set_intfdata(intf, NULL);
 927         free_skb_pool(dev);
 928 out1:
 929         free_all_urbs(dev);
 930 out:
 931         kfree(dev->intr_buff);
 932         free_netdev(netdev);
 933         return -EIO;
 934 }
 935
 936 static void rtl8150_disconnect(struct usb_interface *intf)
 937 {
 938         rtl8150_t *dev = usb_get_intfdata(intf);
 939
 940         usb_set_intfdata(intf, NULL);
 941         if (dev) {
 942                 set_bit(RTL8150_UNPLUG, &dev->flags);
 943                 tasklet_kill(&dev->tl);
 944                 unregister_netdev(dev->netdev);
 945                 unlink_all_urbs(dev);
 946                 free_all_urbs(dev);
 947                 free_skb_pool(dev);
 948                 dev_kfree_skb(dev->rx_skb);
 949                 kfree(dev->intr_buff);
 950                 free_netdev(dev->netdev);
 951         }
 952 }
 953
 954 static struct usb_driver rtl8150_driver = {
 955         .name           = driver_name,
 956         .probe          = rtl8150_probe,
 957         .disconnect     = rtl8150_disconnect,
 958         .id_table       = rtl8150_table,
 959         .suspend        = rtl8150_suspend,
 960         .resume         = rtl8150_resume,
 961         .disable_hub_initiated_lpm = 1,
 962 };
 963
 964 module_usb_driver(rtl8150_driver);
 965
 966 MODULE_AUTHOR(DRIVER_AUTHOR);
 967 MODULE_DESCRIPTION(DRIVER_DESC);
 968 MODULE_LICENSE("GPL");