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 void set_ethernet_addr(rtl8150_t *dev)
 278 {
 279         u8 node_id[ETH_ALEN];
 280         int ret;
 281
 282         ret = get_registers(dev, IDR, sizeof(node_id), node_id);
 283
 284         if (ret == sizeof(node_id)) {
 285                 ether_addr_copy(dev->netdev->dev_addr, node_id);
 286         } else {
 287                 eth_hw_addr_random(dev->netdev);
 288                 netdev_notice(dev->netdev, "Assigned a random MAC address: %pM\n",
 289                               dev->netdev->dev_addr);
 290         }
 291 }
 292
 293 static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
 294 {
 295         struct sockaddr *addr = p;
 296         rtl8150_t *dev = netdev_priv(netdev);
 297
 298         if (netif_running(netdev))
 299                 return -EBUSY;
 300
 301         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 302         netdev_dbg(netdev, "Setting MAC address to %pM\n", netdev->dev_addr);
 303         /* Set the IDR registers. */
 304         set_registers(dev, IDR, netdev->addr_len, netdev->dev_addr);
 305 #ifdef EEPROM_WRITE
 306         {
 307         int i;
 308         u8 cr;
 309         /* Get the CR contents. */
 310         get_registers(dev, CR, 1, &cr);
 311         /* Set the WEPROM bit (eeprom write enable). */
 312         cr |= 0x20;
 313         set_registers(dev, CR, 1, &cr);
 314         /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
 315            so we need to split them up. */
 316         for (i = 0; i * 2 < netdev->addr_len; i++) {
 317                 set_registers(dev, IDR_EEPROM + (i * 2), 2,
 318                 netdev->dev_addr + (i * 2));
 319         }
 320         /* Clear the WEPROM bit (preventing accidental eeprom writes). */
 321         cr &= 0xdf;
 322         set_registers(dev, CR, 1, &cr);
 323         }
 324 #endif
 325         return 0;
 326 }
 327
 328 static int rtl8150_reset(rtl8150_t * dev)
 329 {
 330         u8 data = 0x10;
 331         int i = HZ;
 332
 333         set_registers(dev, CR, 1, &data);
 334         do {
 335                 get_registers(dev, CR, 1, &data);
 336         } while ((data & 0x10) && --i);
 337
 338         return (i > 0) ? 1 : 0;
 339 }
 340
 341 static int alloc_all_urbs(rtl8150_t * dev)
 342 {
 343         dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 344         if (!dev->rx_urb)
 345                 return 0;
 346         dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 347         if (!dev->tx_urb) {
 348                 usb_free_urb(dev->rx_urb);
 349                 return 0;
 350         }
 351         dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
 352         if (!dev->intr_urb) {
 353                 usb_free_urb(dev->rx_urb);
 354                 usb_free_urb(dev->tx_urb);
 355                 return 0;
 356         }
 357
 358         return 1;
 359 }
 360
 361 static void free_all_urbs(rtl8150_t * dev)
 362 {
 363         usb_free_urb(dev->rx_urb);
 364         usb_free_urb(dev->tx_urb);
 365         usb_free_urb(dev->intr_urb);
 366 }
 367
 368 static void unlink_all_urbs(rtl8150_t * dev)
 369 {
 370         usb_kill_urb(dev->rx_urb);
 371         usb_kill_urb(dev->tx_urb);
 372         usb_kill_urb(dev->intr_urb);
 373 }
 374
 375 static inline struct sk_buff *pull_skb(rtl8150_t *dev)
 376 {
 377         struct sk_buff *skb;
 378         int i;
 379
 380         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 381                 if (dev->rx_skb_pool[i]) {
 382                         skb = dev->rx_skb_pool[i];
 383                         dev->rx_skb_pool[i] = NULL;
 384                         return skb;
 385                 }
 386         }
 387         return NULL;
 388 }
 389
 390 static void read_bulk_callback(struct urb *urb)
 391 {
 392         rtl8150_t *dev;
 393         unsigned pkt_len, res;
 394         struct sk_buff *skb;
 395         struct net_device *netdev;
 396         int status = urb->status;
 397         int result;
 398         unsigned long flags;
 399
 400         dev = urb->context;
 401         if (!dev)
 402                 return;
 403         if (test_bit(RTL8150_UNPLUG, &dev->flags))
 404                 return;
 405         netdev = dev->netdev;
 406         if (!netif_device_present(netdev))
 407                 return;
 408
 409         switch (status) {
 410         case 0:
 411                 break;
 412         case -ENOENT:
 413                 return; /* the urb is in unlink state */
 414         case -ETIME:
 415                 if (printk_ratelimit())
 416                         dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
 417                 goto goon;
 418         default:
 419                 if (printk_ratelimit())
 420                         dev_warn(&urb->dev->dev, "Rx status %d\n", status);
 421                 goto goon;
 422         }
 423
 424         if (!dev->rx_skb)
 425                 goto resched;
 426         /* protect against short packets (tell me why we got some?!?) */
 427         if (urb->actual_length < 4)
 428                 goto goon;
 429
 430         res = urb->actual_length;
 431         pkt_len = res - 4;
 432
 433         skb_put(dev->rx_skb, pkt_len);
 434         dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
 435         netif_rx(dev->rx_skb);
 436         netdev->stats.rx_packets++;
 437         netdev->stats.rx_bytes += pkt_len;
 438
 439         spin_lock_irqsave(&dev->rx_pool_lock, flags);
 440         skb = pull_skb(dev);
 441         spin_unlock_irqrestore(&dev->rx_pool_lock, flags);
 442         if (!skb)
 443                 goto resched;
 444
 445         dev->rx_skb = skb;
 446 goon:
 447         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 448                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 449         result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
 450         if (result == -ENODEV)
 451                 netif_device_detach(dev->netdev);
 452         else if (result) {
 453                 set_bit(RX_URB_FAIL, &dev->flags);
 454                 goto resched;
 455         } else {
 456                 clear_bit(RX_URB_FAIL, &dev->flags);
 457         }
 458
 459         return;
 460 resched:
 461         tasklet_schedule(&dev->tl);
 462 }
 463
 464 static void write_bulk_callback(struct urb *urb)
 465 {
 466         rtl8150_t *dev;
 467         int status = urb->status;
 468
 469         dev = urb->context;
 470         if (!dev)
 471                 return;
 472         dev_kfree_skb_irq(dev->tx_skb);
 473         if (!netif_device_present(dev->netdev))
 474                 return;
 475         if (status)
 476                 dev_info(&urb->dev->dev, "%s: Tx status %d\n",
 477                          dev->netdev->name, status);
 478         netif_trans_update(dev->netdev);
 479         netif_wake_queue(dev->netdev);
 480 }
 481
 482 static void intr_callback(struct urb *urb)
 483 {
 484         rtl8150_t *dev;
 485         __u8 *d;
 486         int status = urb->status;
 487         int res;
 488
 489         dev = urb->context;
 490         if (!dev)
 491                 return;
 492         switch (status) {
 493         case 0:                 /* success */
 494                 break;
 495         case -ECONNRESET:       /* unlink */
 496         case -ENOENT:
 497         case -ESHUTDOWN:
 498                 return;
 499         /* -EPIPE:  should clear the halt */
 500         default:
 501                 dev_info(&urb->dev->dev, "%s: intr status %d\n",
 502                          dev->netdev->name, status);
 503                 goto resubmit;
 504         }
 505
 506         d = urb->transfer_buffer;
 507         if (d[0] & TSR_ERRORS) {
 508                 dev->netdev->stats.tx_errors++;
 509                 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
 510                         dev->netdev->stats.tx_aborted_errors++;
 511                 if (d[INT_TSR] & TSR_LCOL)
 512                         dev->netdev->stats.tx_window_errors++;
 513                 if (d[INT_TSR] & TSR_LOSS_CRS)
 514                         dev->netdev->stats.tx_carrier_errors++;
 515         }
 516         /* Report link status changes to the network stack */
 517         if ((d[INT_MSR] & MSR_LINK) == 0) {
 518                 if (netif_carrier_ok(dev->netdev)) {
 519                         netif_carrier_off(dev->netdev);
 520                         netdev_dbg(dev->netdev, "%s: LINK LOST\n", __func__);
 521                 }
 522         } else {
 523                 if (!netif_carrier_ok(dev->netdev)) {
 524                         netif_carrier_on(dev->netdev);
 525                         netdev_dbg(dev->netdev, "%s: LINK CAME BACK\n", __func__);
 526                 }
 527         }
 528
 529 resubmit:
 530         res = usb_submit_urb (urb, GFP_ATOMIC);
 531         if (res == -ENODEV)
 532                 netif_device_detach(dev->netdev);
 533         else if (res)
 534                 dev_err(&dev->udev->dev,
 535                         "can't resubmit intr, %s-%s/input0, status %d\n",
 536                         dev->udev->bus->bus_name, dev->udev->devpath, res);
 537 }
 538
 539 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
 540 {
 541         rtl8150_t *dev = usb_get_intfdata(intf);
 542
 543         netif_device_detach(dev->netdev);
 544
 545         if (netif_running(dev->netdev)) {
 546                 usb_kill_urb(dev->rx_urb);
 547                 usb_kill_urb(dev->intr_urb);
 548         }
 549         return 0;
 550 }
 551
 552 static int rtl8150_resume(struct usb_interface *intf)
 553 {
 554         rtl8150_t *dev = usb_get_intfdata(intf);
 555
 556         netif_device_attach(dev->netdev);
 557         if (netif_running(dev->netdev)) {
 558                 dev->rx_urb->status = 0;
 559                 dev->rx_urb->actual_length = 0;
 560                 read_bulk_callback(dev->rx_urb);
 561
 562                 dev->intr_urb->status = 0;
 563                 dev->intr_urb->actual_length = 0;
 564                 intr_callback(dev->intr_urb);
 565         }
 566         return 0;
 567 }
 568
 569 /*
 570 **
 571 **      network related part of the code
 572 **
 573 */
 574
 575 static void fill_skb_pool(rtl8150_t *dev)
 576 {
 577         struct sk_buff *skb;
 578         int i;
 579
 580         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 581                 if (dev->rx_skb_pool[i])
 582                         continue;
 583                 skb = dev_alloc_skb(RTL8150_MTU + 2);
 584                 if (!skb) {
 585                         return;
 586                 }
 587                 skb_reserve(skb, 2);
 588                 dev->rx_skb_pool[i] = skb;
 589         }
 590 }
 591
 592 static void free_skb_pool(rtl8150_t *dev)
 593 {
 594         int i;
 595
 596         for (i = 0; i < RX_SKB_POOL_SIZE; i++)
 597                 dev_kfree_skb(dev->rx_skb_pool[i]);
 598 }
 599
 600 static void rx_fixup(unsigned long data)
 601 {
 602         struct rtl8150 *dev = (struct rtl8150 *)data;
 603         struct sk_buff *skb;
 604         int status;
 605
 606         spin_lock_irq(&dev->rx_pool_lock);
 607         fill_skb_pool(dev);
 608         spin_unlock_irq(&dev->rx_pool_lock);
 609         if (test_bit(RX_URB_FAIL, &dev->flags))
 610                 if (dev->rx_skb)
 611                         goto try_again;
 612         spin_lock_irq(&dev->rx_pool_lock);
 613         skb = pull_skb(dev);
 614         spin_unlock_irq(&dev->rx_pool_lock);
 615         if (skb == NULL)
 616                 goto tlsched;
 617         dev->rx_skb = skb;
 618         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 619                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 620 try_again:
 621         status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
 622         if (status == -ENODEV) {
 623                 netif_device_detach(dev->netdev);
 624         } else if (status) {
 625                 set_bit(RX_URB_FAIL, &dev->flags);
 626                 goto tlsched;
 627         } else {
 628                 clear_bit(RX_URB_FAIL, &dev->flags);
 629         }
 630
 631         return;
 632 tlsched:
 633         tasklet_schedule(&dev->tl);
 634 }
 635
 636 static int enable_net_traffic(rtl8150_t * dev)
 637 {
 638         u8 cr, tcr, rcr, msr;
 639
 640         if (!rtl8150_reset(dev)) {
 641                 dev_warn(&dev->udev->dev, "device reset failed\n");
 642         }
 643         /* RCR bit7=1 attach Rx info at the end;  =0 HW CRC (which is broken) */
 644         rcr = 0x9e;
 645         tcr = 0xd8;
 646         cr = 0x0c;
 647         if (!(rcr & 0x80))
 648                 set_bit(RTL8150_HW_CRC, &dev->flags);
 649         set_registers(dev, RCR, 1, &rcr);
 650         set_registers(dev, TCR, 1, &tcr);
 651         set_registers(dev, CR, 1, &cr);
 652         get_registers(dev, MSR, 1, &msr);
 653
 654         return 0;
 655 }
 656
 657 static void disable_net_traffic(rtl8150_t * dev)
 658 {
 659         u8 cr;
 660
 661         get_registers(dev, CR, 1, &cr);
 662         cr &= 0xf3;
 663         set_registers(dev, CR, 1, &cr);
 664 }
 665
 666 static void rtl8150_tx_timeout(struct net_device *netdev, unsigned int txqueue)
 667 {
 668         rtl8150_t *dev = netdev_priv(netdev);
 669         dev_warn(&netdev->dev, "Tx timeout.\n");
 670         usb_unlink_urb(dev->tx_urb);
 671         netdev->stats.tx_errors++;
 672 }
 673
 674 static void rtl8150_set_multicast(struct net_device *netdev)
 675 {
 676         rtl8150_t *dev = netdev_priv(netdev);
 677         u16 rx_creg = 0x9e;
 678
 679         netif_stop_queue(netdev);
 680         if (netdev->flags & IFF_PROMISC) {
 681                 rx_creg |= 0x0001;
 682                 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
 683         } else if (!netdev_mc_empty(netdev) ||
 684                    (netdev->flags & IFF_ALLMULTI)) {
 685                 rx_creg &= 0xfffe;
 686                 rx_creg |= 0x0002;
 687                 dev_dbg(&netdev->dev, "%s: allmulti set\n", netdev->name);
 688         } else {
 689                 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
 690                 rx_creg &= 0x00fc;
 691         }
 692         async_set_registers(dev, RCR, sizeof(rx_creg), rx_creg);
 693         netif_wake_queue(netdev);
 694 }
 695
 696 static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb,
 697                                             struct net_device *netdev)
 698 {
 699         rtl8150_t *dev = netdev_priv(netdev);
 700         int count, res;
 701
 702         netif_stop_queue(netdev);
 703         count = (skb->len < 60) ? 60 : skb->len;
 704         count = (count & 0x3f) ? count : count + 1;
 705         dev->tx_skb = skb;
 706         usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
 707                       skb->data, count, write_bulk_callback, dev);
 708         if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
 709                 /* Can we get/handle EPIPE here? */
 710                 if (res == -ENODEV)
 711                         netif_device_detach(dev->netdev);
 712                 else {
 713                         dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
 714                         netdev->stats.tx_errors++;
 715                         netif_start_queue(netdev);
 716                 }
 717         } else {
 718                 netdev->stats.tx_packets++;
 719                 netdev->stats.tx_bytes += skb->len;
 720                 netif_trans_update(netdev);
 721         }
 722
 723         return NETDEV_TX_OK;
 724 }
 725
 726
 727 static void set_carrier(struct net_device *netdev)
 728 {
 729         rtl8150_t *dev = netdev_priv(netdev);
 730         short tmp;
 731
 732         get_registers(dev, CSCR, 2, &tmp);
 733         if (tmp & CSCR_LINK_STATUS)
 734                 netif_carrier_on(netdev);
 735         else
 736                 netif_carrier_off(netdev);
 737 }
 738
 739 static int rtl8150_open(struct net_device *netdev)
 740 {
 741         rtl8150_t *dev = netdev_priv(netdev);
 742         int res;
 743
 744         if (dev->rx_skb == NULL)
 745                 dev->rx_skb = pull_skb(dev);
 746         if (!dev->rx_skb)
 747                 return -ENOMEM;
 748
 749         set_registers(dev, IDR, 6, netdev->dev_addr);
 750
 751         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 752                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 753         if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
 754                 if (res == -ENODEV)
 755                         netif_device_detach(dev->netdev);
 756                 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
 757                 return res;
 758         }
 759         usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
 760                      dev->intr_buff, INTBUFSIZE, intr_callback,
 761                      dev, dev->intr_interval);
 762         if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
 763                 if (res == -ENODEV)
 764                         netif_device_detach(dev->netdev);
 765                 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
 766                 usb_kill_urb(dev->rx_urb);
 767                 return res;
 768         }
 769         enable_net_traffic(dev);
 770         set_carrier(netdev);
 771         netif_start_queue(netdev);
 772
 773         return res;
 774 }
 775
 776 static int rtl8150_close(struct net_device *netdev)
 777 {
 778         rtl8150_t *dev = netdev_priv(netdev);
 779
 780         netif_stop_queue(netdev);
 781         if (!test_bit(RTL8150_UNPLUG, &dev->flags))
 782                 disable_net_traffic(dev);
 783         unlink_all_urbs(dev);
 784
 785         return 0;
 786 }
 787
 788 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
 789 {
 790         rtl8150_t *dev = netdev_priv(netdev);
 791
 792         strlcpy(info->driver, driver_name, sizeof(info->driver));
 793         strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
 794         usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info));
 795 }
 796
 797 static int rtl8150_get_link_ksettings(struct net_device *netdev,
 798                                       struct ethtool_link_ksettings *ecmd)
 799 {
 800         rtl8150_t *dev = netdev_priv(netdev);
 801         short lpa, bmcr;
 802         u32 supported;
 803
 804         supported = (SUPPORTED_10baseT_Half |
 805                           SUPPORTED_10baseT_Full |
 806                           SUPPORTED_100baseT_Half |
 807                           SUPPORTED_100baseT_Full |
 808                           SUPPORTED_Autoneg |
 809                           SUPPORTED_TP | SUPPORTED_MII);
 810         ecmd->base.port = PORT_TP;
 811         ecmd->base.phy_address = dev->phy;
 812         get_registers(dev, BMCR, 2, &bmcr);
 813         get_registers(dev, ANLP, 2, &lpa);
 814         if (bmcr & BMCR_ANENABLE) {
 815                 u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ?
 816                              SPEED_100 : SPEED_10);
 817                 ecmd->base.speed = speed;
 818                 ecmd->base.autoneg = AUTONEG_ENABLE;
 819                 if (speed == SPEED_100)
 820                         ecmd->base.duplex = (lpa & LPA_100FULL) ?
 821                             DUPLEX_FULL : DUPLEX_HALF;
 822                 else
 823                         ecmd->base.duplex = (lpa & LPA_10FULL) ?
 824                             DUPLEX_FULL : DUPLEX_HALF;
 825         } else {
 826                 ecmd->base.autoneg = AUTONEG_DISABLE;
 827                 ecmd->base.speed = ((bmcr & BMCR_SPEED100) ?
 828                                              SPEED_100 : SPEED_10);
 829                 ecmd->base.duplex = (bmcr & BMCR_FULLDPLX) ?
 830                     DUPLEX_FULL : DUPLEX_HALF;
 831         }
 832
 833         ethtool_convert_legacy_u32_to_link_mode(ecmd->link_modes.supported,
 834                                                 supported);
 835
 836         return 0;
 837 }
 838
 839 static const struct ethtool_ops ops = {
 840         .get_drvinfo = rtl8150_get_drvinfo,
 841         .get_link = ethtool_op_get_link,
 842         .get_link_ksettings = rtl8150_get_link_ksettings,
 843 };
 844
 845 static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 846 {
 847         rtl8150_t *dev = netdev_priv(netdev);
 848         u16 *data = (u16 *) & rq->ifr_ifru;
 849         int res = 0;
 850
 851         switch (cmd) {
 852         case SIOCDEVPRIVATE:
 853                 data[0] = dev->phy;
 854                 fallthrough;
 855         case SIOCDEVPRIVATE + 1:
 856                 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
 857                 break;
 858         case SIOCDEVPRIVATE + 2:
 859                 if (!capable(CAP_NET_ADMIN))
 860                         return -EPERM;
 861                 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
 862                 break;
 863         default:
 864                 res = -EOPNOTSUPP;
 865         }
 866
 867         return res;
 868 }
 869
 870 static const struct net_device_ops rtl8150_netdev_ops = {
 871         .ndo_open               = rtl8150_open,
 872         .ndo_stop               = rtl8150_close,
 873         .ndo_do_ioctl           = rtl8150_ioctl,
 874         .ndo_start_xmit         = rtl8150_start_xmit,
 875         .ndo_tx_timeout         = rtl8150_tx_timeout,
 876         .ndo_set_rx_mode        = rtl8150_set_multicast,
 877         .ndo_set_mac_address    = rtl8150_set_mac_address,
 878
 879         .ndo_validate_addr      = eth_validate_addr,
 880 };
 881
 882 static int rtl8150_probe(struct usb_interface *intf,
 883                          const struct usb_device_id *id)
 884 {
 885         struct usb_device *udev = interface_to_usbdev(intf);
 886         rtl8150_t *dev;
 887         struct net_device *netdev;
 888
 889         netdev = alloc_etherdev(sizeof(rtl8150_t));
 890         if (!netdev)
 891                 return -ENOMEM;
 892
 893         dev = netdev_priv(netdev);
 894
 895         dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
 896         if (!dev->intr_buff) {
 897                 free_netdev(netdev);
 898                 return -ENOMEM;
 899         }
 900
 901         tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
 902         spin_lock_init(&dev->rx_pool_lock);
 903
 904         dev->udev = udev;
 905         dev->netdev = netdev;
 906         netdev->netdev_ops = &rtl8150_netdev_ops;
 907         netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
 908         netdev->ethtool_ops = &ops;
 909         dev->intr_interval = 100;       /* 100ms */
 910
 911         if (!alloc_all_urbs(dev)) {
 912                 dev_err(&intf->dev, "out of memory\n");
 913                 goto out;
 914         }
 915         if (!rtl8150_reset(dev)) {
 916                 dev_err(&intf->dev, "couldn't reset the device\n");
 917                 goto out1;
 918         }
 919         fill_skb_pool(dev);
 920         set_ethernet_addr(dev);
 921
 922         usb_set_intfdata(intf, dev);
 923         SET_NETDEV_DEV(netdev, &intf->dev);
 924         if (register_netdev(netdev) != 0) {
 925                 dev_err(&intf->dev, "couldn't register the device\n");
 926                 goto out2;
 927         }
 928
 929         dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
 930
 931         return 0;
 932
 933 out2:
 934         usb_set_intfdata(intf, NULL);
 935         free_skb_pool(dev);
 936 out1:
 937         free_all_urbs(dev);
 938 out:
 939         kfree(dev->intr_buff);
 940         free_netdev(netdev);
 941         return -EIO;
 942 }
 943
 944 static void rtl8150_disconnect(struct usb_interface *intf)
 945 {
 946         rtl8150_t *dev = usb_get_intfdata(intf);
 947
 948         usb_set_intfdata(intf, NULL);
 949         if (dev) {
 950                 set_bit(RTL8150_UNPLUG, &dev->flags);
 951                 tasklet_kill(&dev->tl);
 952                 unregister_netdev(dev->netdev);
 953                 unlink_all_urbs(dev);
 954                 free_all_urbs(dev);
 955                 free_skb_pool(dev);
 956                 dev_kfree_skb(dev->rx_skb);
 957                 kfree(dev->intr_buff);
 958                 free_netdev(dev->netdev);
 959         }
 960 }
 961
 962 static struct usb_driver rtl8150_driver = {
 963         .name           = driver_name,
 964         .probe          = rtl8150_probe,
 965         .disconnect     = rtl8150_disconnect,
 966         .id_table       = rtl8150_table,
 967         .suspend        = rtl8150_suspend,
 968         .resume         = rtl8150_resume,
 969         .disable_hub_initiated_lpm = 1,
 970 };
 971
 972 module_usb_driver(rtl8150_driver);
 973
 974 MODULE_AUTHOR(DRIVER_AUTHOR);
 975 MODULE_DESCRIPTION(DRIVER_DESC);
 976 MODULE_LICENSE("GPL");