drivers/net/usb/rtl8150.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  Copyright (c) 2002 Petko Manolov ([email protected])
   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 <[email protected]>"
  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         return usb_control_msg_recv(dev->udev, 0, RTL8150_REQ_GET_REGS,
 156                                     RTL8150_REQT_READ, indx, 0, data, size,
 157                                     1000, GFP_NOIO);
 158 }
 159
 160 static int set_registers(rtl8150_t * dev, u16 indx, u16 size, const void *data)
 161 {
 162         return usb_control_msg_send(dev->udev, 0, RTL8150_REQ_SET_REGS,
 163                                     RTL8150_REQT_WRITE, indx, 0, data, size,
 164                                     1000, GFP_NOIO);
 165 }
 166
 167 static void async_set_reg_cb(struct urb *urb)
 168 {
 169         struct async_req *req = (struct async_req *)urb->context;
 170         int status = urb->status;
 171
 172         if (status < 0)
 173                 dev_dbg(&urb->dev->dev, "%s failed with %d", __func__, status);
 174         kfree(req);
 175         usb_free_urb(urb);
 176 }
 177
 178 static int async_set_registers(rtl8150_t *dev, u16 indx, u16 size, u16 reg)
 179 {
 180         int res = -ENOMEM;
 181         struct urb *async_urb;
 182         struct async_req *req;
 183
 184         req = kmalloc(sizeof(struct async_req), GFP_ATOMIC);
 185         if (req == NULL)
 186                 return res;
 187         async_urb = usb_alloc_urb(0, GFP_ATOMIC);
 188         if (async_urb == NULL) {
 189                 kfree(req);
 190                 return res;
 191         }
 192         req->rx_creg = cpu_to_le16(reg);
 193         req->dr.bRequestType = RTL8150_REQT_WRITE;
 194         req->dr.bRequest = RTL8150_REQ_SET_REGS;
 195         req->dr.wIndex = 0;
 196         req->dr.wValue = cpu_to_le16(indx);
 197         req->dr.wLength = cpu_to_le16(size);
 198         usb_fill_control_urb(async_urb, dev->udev,
 199                              usb_sndctrlpipe(dev->udev, 0), (void *)&req->dr,
 200                              &req->rx_creg, size, async_set_reg_cb, req);
 201         res = usb_submit_urb(async_urb, GFP_ATOMIC);
 202         if (res) {
 203                 if (res == -ENODEV)
 204                         netif_device_detach(dev->netdev);
 205                 dev_err(&dev->udev->dev, "%s failed with %d\n", __func__, res);
 206         }
 207         return res;
 208 }
 209
 210 static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
 211 {
 212         int i;
 213         u8 data[3], tmp;
 214
 215         data[0] = phy;
 216         data[1] = data[2] = 0;
 217         tmp = indx | PHY_READ | PHY_GO;
 218         i = 0;
 219
 220         set_registers(dev, PHYADD, sizeof(data), data);
 221         set_registers(dev, PHYCNT, 1, &tmp);
 222         do {
 223                 get_registers(dev, PHYCNT, 1, data);
 224         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 225
 226         if (i <= MII_TIMEOUT) {
 227                 get_registers(dev, PHYDAT, 2, data);
 228                 *reg = data[0] | (data[1] << 8);
 229                 return 0;
 230         } else
 231                 return 1;
 232 }
 233
 234 static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
 235 {
 236         int i;
 237         u8 data[3], tmp;
 238
 239         data[0] = phy;
 240         data[1] = reg & 0xff;
 241         data[2] = (reg >> 8) & 0xff;
 242         tmp = indx | PHY_WRITE | PHY_GO;
 243         i = 0;
 244
 245         set_registers(dev, PHYADD, sizeof(data), data);
 246         set_registers(dev, PHYCNT, 1, &tmp);
 247         do {
 248                 get_registers(dev, PHYCNT, 1, data);
 249         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 250
 251         if (i <= MII_TIMEOUT)
 252                 return 0;
 253         else
 254                 return 1;
 255 }
 256
 257 static void set_ethernet_addr(rtl8150_t *dev)
 258 {
 259         u8 node_id[ETH_ALEN];
 260         int ret;
 261
 262         ret = get_registers(dev, IDR, sizeof(node_id), node_id);
 263
 264         if (!ret) {
 265                 eth_hw_addr_set(dev->netdev, node_id);
 266         } else {
 267                 eth_hw_addr_random(dev->netdev);
 268                 netdev_notice(dev->netdev, "Assigned a random MAC address: %pM\n",
 269                               dev->netdev->dev_addr);
 270         }
 271 }
 272
 273 static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
 274 {
 275         struct sockaddr *addr = p;
 276         rtl8150_t *dev = netdev_priv(netdev);
 277
 278         if (netif_running(netdev))
 279                 return -EBUSY;
 280
 281         eth_hw_addr_set(netdev, addr->sa_data);
 282         netdev_dbg(netdev, "Setting MAC address to %pM\n", netdev->dev_addr);
 283         /* Set the IDR registers. */
 284         set_registers(dev, IDR, netdev->addr_len, netdev->dev_addr);
 285 #ifdef EEPROM_WRITE
 286         {
 287         int i;
 288         u8 cr;
 289         /* Get the CR contents. */
 290         get_registers(dev, CR, 1, &cr);
 291         /* Set the WEPROM bit (eeprom write enable). */
 292         cr |= 0x20;
 293         set_registers(dev, CR, 1, &cr);
 294         /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
 295            so we need to split them up. */
 296         for (i = 0; i * 2 < netdev->addr_len; i++) {
 297                 set_registers(dev, IDR_EEPROM + (i * 2), 2,
 298                 netdev->dev_addr + (i * 2));
 299         }
 300         /* Clear the WEPROM bit (preventing accidental eeprom writes). */
 301         cr &= 0xdf;
 302         set_registers(dev, CR, 1, &cr);
 303         }
 304 #endif
 305         return 0;
 306 }
 307
 308 static int rtl8150_reset(rtl8150_t * dev)
 309 {
 310         u8 data = 0x10;
 311         int i = HZ;
 312
 313         set_registers(dev, CR, 1, &data);
 314         do {
 315                 get_registers(dev, CR, 1, &data);
 316         } while ((data & 0x10) && --i);
 317
 318         return (i > 0) ? 1 : 0;
 319 }
 320
 321 static int alloc_all_urbs(rtl8150_t * dev)
 322 {
 323         dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 324         if (!dev->rx_urb)
 325                 return 0;
 326         dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 327         if (!dev->tx_urb) {
 328                 usb_free_urb(dev->rx_urb);
 329                 return 0;
 330         }
 331         dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
 332         if (!dev->intr_urb) {
 333                 usb_free_urb(dev->rx_urb);
 334                 usb_free_urb(dev->tx_urb);
 335                 return 0;
 336         }
 337
 338         return 1;
 339 }
 340
 341 static void free_all_urbs(rtl8150_t * dev)
 342 {
 343         usb_free_urb(dev->rx_urb);
 344         usb_free_urb(dev->tx_urb);
 345         usb_free_urb(dev->intr_urb);
 346 }
 347
 348 static void unlink_all_urbs(rtl8150_t * dev)
 349 {
 350         usb_kill_urb(dev->rx_urb);
 351         usb_kill_urb(dev->tx_urb);
 352         usb_kill_urb(dev->intr_urb);
 353 }
 354
 355 static inline struct sk_buff *pull_skb(rtl8150_t *dev)
 356 {
 357         struct sk_buff *skb;
 358         int i;
 359
 360         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 361                 if (dev->rx_skb_pool[i]) {
 362                         skb = dev->rx_skb_pool[i];
 363                         dev->rx_skb_pool[i] = NULL;
 364                         return skb;
 365                 }
 366         }
 367         return NULL;
 368 }
 369
 370 static void read_bulk_callback(struct urb *urb)
 371 {
 372         rtl8150_t *dev;
 373         unsigned pkt_len, res;
 374         struct sk_buff *skb;
 375         struct net_device *netdev;
 376         int status = urb->status;
 377         int result;
 378         unsigned long flags;
 379
 380         dev = urb->context;
 381         if (!dev)
 382                 return;
 383         if (test_bit(RTL8150_UNPLUG, &dev->flags))
 384                 return;
 385         netdev = dev->netdev;
 386         if (!netif_device_present(netdev))
 387                 return;
 388
 389         switch (status) {
 390         case 0:
 391                 break;
 392         case -ENOENT:
 393                 return; /* the urb is in unlink state */
 394         case -ETIME:
 395                 if (printk_ratelimit())
 396                         dev_warn(&urb->dev->dev, "may be reset is needed?..\n");
 397                 goto goon;
 398         default:
 399                 if (printk_ratelimit())
 400                         dev_warn(&urb->dev->dev, "Rx status %d\n", status);
 401                 goto goon;
 402         }
 403
 404         if (!dev->rx_skb)
 405                 goto resched;
 406         /* protect against short packets (tell me why we got some?!?) */
 407         if (urb->actual_length < 4)
 408                 goto goon;
 409
 410         res = urb->actual_length;
 411         pkt_len = res - 4;
 412
 413         skb_put(dev->rx_skb, pkt_len);
 414         dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
 415         netif_rx(dev->rx_skb);
 416         netdev->stats.rx_packets++;
 417         netdev->stats.rx_bytes += pkt_len;
 418
 419         spin_lock_irqsave(&dev->rx_pool_lock, flags);
 420         skb = pull_skb(dev);
 421         spin_unlock_irqrestore(&dev->rx_pool_lock, flags);
 422         if (!skb)
 423                 goto resched;
 424
 425         dev->rx_skb = skb;
 426 goon:
 427         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 428                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 429         result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
 430         if (result == -ENODEV)
 431                 netif_device_detach(dev->netdev);
 432         else if (result) {
 433                 set_bit(RX_URB_FAIL, &dev->flags);
 434                 goto resched;
 435         } else {
 436                 clear_bit(RX_URB_FAIL, &dev->flags);
 437         }
 438
 439         return;
 440 resched:
 441         tasklet_schedule(&dev->tl);
 442 }
 443
 444 static void write_bulk_callback(struct urb *urb)
 445 {
 446         rtl8150_t *dev;
 447         int status = urb->status;
 448
 449         dev = urb->context;
 450         if (!dev)
 451                 return;
 452         dev_kfree_skb_irq(dev->tx_skb);
 453         if (!netif_device_present(dev->netdev))
 454                 return;
 455         if (status)
 456                 dev_info(&urb->dev->dev, "%s: Tx status %d\n",
 457                          dev->netdev->name, status);
 458         netif_trans_update(dev->netdev);
 459         netif_wake_queue(dev->netdev);
 460 }
 461
 462 static void intr_callback(struct urb *urb)
 463 {
 464         rtl8150_t *dev;
 465         __u8 *d;
 466         int status = urb->status;
 467         int res;
 468
 469         dev = urb->context;
 470         if (!dev)
 471                 return;
 472         switch (status) {
 473         case 0:                 /* success */
 474                 break;
 475         case -ECONNRESET:       /* unlink */
 476         case -ENOENT:
 477         case -ESHUTDOWN:
 478                 return;
 479         /* -EPIPE:  should clear the halt */
 480         default:
 481                 dev_info(&urb->dev->dev, "%s: intr status %d\n",
 482                          dev->netdev->name, status);
 483                 goto resubmit;
 484         }
 485
 486         d = urb->transfer_buffer;
 487         if (d[0] & TSR_ERRORS) {
 488                 dev->netdev->stats.tx_errors++;
 489                 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
 490                         dev->netdev->stats.tx_aborted_errors++;
 491                 if (d[INT_TSR] & TSR_LCOL)
 492                         dev->netdev->stats.tx_window_errors++;
 493                 if (d[INT_TSR] & TSR_LOSS_CRS)
 494                         dev->netdev->stats.tx_carrier_errors++;
 495         }
 496         /* Report link status changes to the network stack */
 497         if ((d[INT_MSR] & MSR_LINK) == 0) {
 498                 if (netif_carrier_ok(dev->netdev)) {
 499                         netif_carrier_off(dev->netdev);
 500                         netdev_dbg(dev->netdev, "%s: LINK LOST\n", __func__);
 501                 }
 502         } else {
 503                 if (!netif_carrier_ok(dev->netdev)) {
 504                         netif_carrier_on(dev->netdev);
 505                         netdev_dbg(dev->netdev, "%s: LINK CAME BACK\n", __func__);
 506                 }
 507         }
 508
 509 resubmit:
 510         res = usb_submit_urb (urb, GFP_ATOMIC);
 511         if (res == -ENODEV)
 512                 netif_device_detach(dev->netdev);
 513         else if (res)
 514                 dev_err(&dev->udev->dev,
 515                         "can't resubmit intr, %s-%s/input0, status %d\n",
 516                         dev->udev->bus->bus_name, dev->udev->devpath, res);
 517 }
 518
 519 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
 520 {
 521         rtl8150_t *dev = usb_get_intfdata(intf);
 522
 523         netif_device_detach(dev->netdev);
 524
 525         if (netif_running(dev->netdev)) {
 526                 usb_kill_urb(dev->rx_urb);
 527                 usb_kill_urb(dev->intr_urb);
 528         }
 529         return 0;
 530 }
 531
 532 static int rtl8150_resume(struct usb_interface *intf)
 533 {
 534         rtl8150_t *dev = usb_get_intfdata(intf);
 535
 536         netif_device_attach(dev->netdev);
 537         if (netif_running(dev->netdev)) {
 538                 dev->rx_urb->status = 0;
 539                 dev->rx_urb->actual_length = 0;
 540                 read_bulk_callback(dev->rx_urb);
 541
 542                 dev->intr_urb->status = 0;
 543                 dev->intr_urb->actual_length = 0;
 544                 intr_callback(dev->intr_urb);
 545         }
 546         return 0;
 547 }
 548
 549 /*
 550 **
 551 **      network related part of the code
 552 **
 553 */
 554
 555 static void fill_skb_pool(rtl8150_t *dev)
 556 {
 557         struct sk_buff *skb;
 558         int i;
 559
 560         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 561                 if (dev->rx_skb_pool[i])
 562                         continue;
 563                 skb = dev_alloc_skb(RTL8150_MTU + 2);
 564                 if (!skb) {
 565                         return;
 566                 }
 567                 skb_reserve(skb, 2);
 568                 dev->rx_skb_pool[i] = skb;
 569         }
 570 }
 571
 572 static void free_skb_pool(rtl8150_t *dev)
 573 {
 574         int i;
 575
 576         for (i = 0; i < RX_SKB_POOL_SIZE; i++)
 577                 dev_kfree_skb(dev->rx_skb_pool[i]);
 578 }
 579
 580 static void rx_fixup(struct tasklet_struct *t)
 581 {
 582         struct rtl8150 *dev = from_tasklet(dev, t, tl);
 583         struct sk_buff *skb;
 584         int status;
 585
 586         spin_lock_irq(&dev->rx_pool_lock);
 587         fill_skb_pool(dev);
 588         spin_unlock_irq(&dev->rx_pool_lock);
 589         if (test_bit(RX_URB_FAIL, &dev->flags))
 590                 if (dev->rx_skb)
 591                         goto try_again;
 592         spin_lock_irq(&dev->rx_pool_lock);
 593         skb = pull_skb(dev);
 594         spin_unlock_irq(&dev->rx_pool_lock);
 595         if (skb == NULL)
 596                 goto tlsched;
 597         dev->rx_skb = skb;
 598         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 599                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 600 try_again:
 601         status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
 602         if (status == -ENODEV) {
 603                 netif_device_detach(dev->netdev);
 604         } else if (status) {
 605                 set_bit(RX_URB_FAIL, &dev->flags);
 606                 goto tlsched;
 607         } else {
 608                 clear_bit(RX_URB_FAIL, &dev->flags);
 609         }
 610
 611         return;
 612 tlsched:
 613         tasklet_schedule(&dev->tl);
 614 }
 615
 616 static int enable_net_traffic(rtl8150_t * dev)
 617 {
 618         u8 cr, tcr, rcr, msr;
 619
 620         if (!rtl8150_reset(dev)) {
 621                 dev_warn(&dev->udev->dev, "device reset failed\n");
 622         }
 623         /* RCR bit7=1 attach Rx info at the end;  =0 HW CRC (which is broken) */
 624         rcr = 0x9e;
 625         tcr = 0xd8;
 626         cr = 0x0c;
 627         if (!(rcr & 0x80))
 628                 set_bit(RTL8150_HW_CRC, &dev->flags);
 629         set_registers(dev, RCR, 1, &rcr);
 630         set_registers(dev, TCR, 1, &tcr);
 631         set_registers(dev, CR, 1, &cr);
 632         get_registers(dev, MSR, 1, &msr);
 633
 634         return 0;
 635 }
 636
 637 static void disable_net_traffic(rtl8150_t * dev)
 638 {
 639         u8 cr;
 640
 641         get_registers(dev, CR, 1, &cr);
 642         cr &= 0xf3;
 643         set_registers(dev, CR, 1, &cr);
 644 }
 645
 646 static void rtl8150_tx_timeout(struct net_device *netdev, unsigned int txqueue)
 647 {
 648         rtl8150_t *dev = netdev_priv(netdev);
 649         dev_warn(&netdev->dev, "Tx timeout.\n");
 650         usb_unlink_urb(dev->tx_urb);
 651         netdev->stats.tx_errors++;
 652 }
 653
 654 static void rtl8150_set_multicast(struct net_device *netdev)
 655 {
 656         rtl8150_t *dev = netdev_priv(netdev);
 657         u16 rx_creg = 0x9e;
 658
 659         netif_stop_queue(netdev);
 660         if (netdev->flags & IFF_PROMISC) {
 661                 rx_creg |= 0x0001;
 662                 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name);
 663         } else if (!netdev_mc_empty(netdev) ||
 664                    (netdev->flags & IFF_ALLMULTI)) {
 665                 rx_creg &= 0xfffe;
 666                 rx_creg |= 0x0002;
 667                 dev_dbg(&netdev->dev, "%s: allmulti set\n", netdev->name);
 668         } else {
 669                 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
 670                 rx_creg &= 0x00fc;
 671         }
 672         async_set_registers(dev, RCR, sizeof(rx_creg), rx_creg);
 673         netif_wake_queue(netdev);
 674 }
 675
 676 static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb,
 677                                             struct net_device *netdev)
 678 {
 679         rtl8150_t *dev = netdev_priv(netdev);
 680         int count, res;
 681
 682         netif_stop_queue(netdev);
 683         count = (skb->len < 60) ? 60 : skb->len;
 684         count = (count & 0x3f) ? count : count + 1;
 685         dev->tx_skb = skb;
 686         usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
 687                       skb->data, count, write_bulk_callback, dev);
 688         if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
 689                 /* Can we get/handle EPIPE here? */
 690                 if (res == -ENODEV)
 691                         netif_device_detach(dev->netdev);
 692                 else {
 693                         dev_warn(&netdev->dev, "failed tx_urb %d\n", res);
 694                         netdev->stats.tx_errors++;
 695                         netif_start_queue(netdev);
 696                 }
 697         } else {
 698                 netdev->stats.tx_packets++;
 699                 netdev->stats.tx_bytes += skb->len;
 700                 netif_trans_update(netdev);
 701         }
 702
 703         return NETDEV_TX_OK;
 704 }
 705
 706
 707 static void set_carrier(struct net_device *netdev)
 708 {
 709         rtl8150_t *dev = netdev_priv(netdev);
 710         short tmp;
 711
 712         get_registers(dev, CSCR, 2, &tmp);
 713         if (tmp & CSCR_LINK_STATUS)
 714                 netif_carrier_on(netdev);
 715         else
 716                 netif_carrier_off(netdev);
 717 }
 718
 719 static int rtl8150_open(struct net_device *netdev)
 720 {
 721         rtl8150_t *dev = netdev_priv(netdev);
 722         int res;
 723
 724         if (dev->rx_skb == NULL)
 725                 dev->rx_skb = pull_skb(dev);
 726         if (!dev->rx_skb)
 727                 return -ENOMEM;
 728
 729         set_registers(dev, IDR, 6, netdev->dev_addr);
 730
 731         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 732                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 733         if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
 734                 if (res == -ENODEV)
 735                         netif_device_detach(dev->netdev);
 736                 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res);
 737                 return res;
 738         }
 739         usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
 740                      dev->intr_buff, INTBUFSIZE, intr_callback,
 741                      dev, dev->intr_interval);
 742         if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
 743                 if (res == -ENODEV)
 744                         netif_device_detach(dev->netdev);
 745                 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res);
 746                 usb_kill_urb(dev->rx_urb);
 747                 return res;
 748         }
 749         enable_net_traffic(dev);
 750         set_carrier(netdev);
 751         netif_start_queue(netdev);
 752
 753         return res;
 754 }
 755
 756 static int rtl8150_close(struct net_device *netdev)
 757 {
 758         rtl8150_t *dev = netdev_priv(netdev);
 759
 760         netif_stop_queue(netdev);
 761         if (!test_bit(RTL8150_UNPLUG, &dev->flags))
 762                 disable_net_traffic(dev);
 763         unlink_all_urbs(dev);
 764
 765         return 0;
 766 }
 767
 768 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
 769 {
 770         rtl8150_t *dev = netdev_priv(netdev);
 771
 772         strlcpy(info->driver, driver_name, sizeof(info->driver));
 773         strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
 774         usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info));
 775 }
 776
 777 static int rtl8150_get_link_ksettings(struct net_device *netdev,
 778                                       struct ethtool_link_ksettings *ecmd)
 779 {
 780         rtl8150_t *dev = netdev_priv(netdev);
 781         short lpa, bmcr;
 782         u32 supported;
 783
 784         supported = (SUPPORTED_10baseT_Half |
 785                           SUPPORTED_10baseT_Full |
 786                           SUPPORTED_100baseT_Half |
 787                           SUPPORTED_100baseT_Full |
 788                           SUPPORTED_Autoneg |
 789                           SUPPORTED_TP | SUPPORTED_MII);
 790         ecmd->base.port = PORT_TP;
 791         ecmd->base.phy_address = dev->phy;
 792         get_registers(dev, BMCR, 2, &bmcr);
 793         get_registers(dev, ANLP, 2, &lpa);
 794         if (bmcr & BMCR_ANENABLE) {
 795                 u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ?
 796                              SPEED_100 : SPEED_10);
 797                 ecmd->base.speed = speed;
 798                 ecmd->base.autoneg = AUTONEG_ENABLE;
 799                 if (speed == SPEED_100)
 800                         ecmd->base.duplex = (lpa & LPA_100FULL) ?
 801                             DUPLEX_FULL : DUPLEX_HALF;
 802                 else
 803                         ecmd->base.duplex = (lpa & LPA_10FULL) ?
 804                             DUPLEX_FULL : DUPLEX_HALF;
 805         } else {
 806                 ecmd->base.autoneg = AUTONEG_DISABLE;
 807                 ecmd->base.speed = ((bmcr & BMCR_SPEED100) ?
 808                                              SPEED_100 : SPEED_10);
 809                 ecmd->base.duplex = (bmcr & BMCR_FULLDPLX) ?
 810                     DUPLEX_FULL : DUPLEX_HALF;
 811         }
 812
 813         ethtool_convert_legacy_u32_to_link_mode(ecmd->link_modes.supported,
 814                                                 supported);
 815
 816         return 0;
 817 }
 818
 819 static const struct ethtool_ops ops = {
 820         .get_drvinfo = rtl8150_get_drvinfo,
 821         .get_link = ethtool_op_get_link,
 822         .get_link_ksettings = rtl8150_get_link_ksettings,
 823 };
 824
 825 static int rtl8150_siocdevprivate(struct net_device *netdev, struct ifreq *rq,
 826                                   void __user *udata, int cmd)
 827 {
 828         rtl8150_t *dev = netdev_priv(netdev);
 829         u16 *data = (u16 *) & rq->ifr_ifru;
 830         int res = 0;
 831
 832         switch (cmd) {
 833         case SIOCDEVPRIVATE:
 834                 data[0] = dev->phy;
 835                 fallthrough;
 836         case SIOCDEVPRIVATE + 1:
 837                 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
 838                 break;
 839         case SIOCDEVPRIVATE + 2:
 840                 if (!capable(CAP_NET_ADMIN))
 841                         return -EPERM;
 842                 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
 843                 break;
 844         default:
 845                 res = -EOPNOTSUPP;
 846         }
 847
 848         return res;
 849 }
 850
 851 static const struct net_device_ops rtl8150_netdev_ops = {
 852         .ndo_open               = rtl8150_open,
 853         .ndo_stop               = rtl8150_close,
 854         .ndo_siocdevprivate     = rtl8150_siocdevprivate,
 855         .ndo_start_xmit         = rtl8150_start_xmit,
 856         .ndo_tx_timeout         = rtl8150_tx_timeout,
 857         .ndo_set_rx_mode        = rtl8150_set_multicast,
 858         .ndo_set_mac_address    = rtl8150_set_mac_address,
 859
 860         .ndo_validate_addr      = eth_validate_addr,
 861 };
 862
 863 static int rtl8150_probe(struct usb_interface *intf,
 864                          const struct usb_device_id *id)
 865 {
 866         struct usb_device *udev = interface_to_usbdev(intf);
 867         rtl8150_t *dev;
 868         struct net_device *netdev;
 869
 870         netdev = alloc_etherdev(sizeof(rtl8150_t));
 871         if (!netdev)
 872                 return -ENOMEM;
 873
 874         dev = netdev_priv(netdev);
 875
 876         dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
 877         if (!dev->intr_buff) {
 878                 free_netdev(netdev);
 879                 return -ENOMEM;
 880         }
 881
 882         tasklet_setup(&dev->tl, rx_fixup);
 883         spin_lock_init(&dev->rx_pool_lock);
 884
 885         dev->udev = udev;
 886         dev->netdev = netdev;
 887         netdev->netdev_ops = &rtl8150_netdev_ops;
 888         netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
 889         netdev->ethtool_ops = &ops;
 890         dev->intr_interval = 100;       /* 100ms */
 891
 892         if (!alloc_all_urbs(dev)) {
 893                 dev_err(&intf->dev, "out of memory\n");
 894                 goto out;
 895         }
 896         if (!rtl8150_reset(dev)) {
 897                 dev_err(&intf->dev, "couldn't reset the device\n");
 898                 goto out1;
 899         }
 900         fill_skb_pool(dev);
 901         set_ethernet_addr(dev);
 902
 903         usb_set_intfdata(intf, dev);
 904         SET_NETDEV_DEV(netdev, &intf->dev);
 905         if (register_netdev(netdev) != 0) {
 906                 dev_err(&intf->dev, "couldn't register the device\n");
 907                 goto out2;
 908         }
 909
 910         dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name);
 911
 912         return 0;
 913
 914 out2:
 915         usb_set_intfdata(intf, NULL);
 916         free_skb_pool(dev);
 917 out1:
 918         free_all_urbs(dev);
 919 out:
 920         kfree(dev->intr_buff);
 921         free_netdev(netdev);
 922         return -EIO;
 923 }
 924
 925 static void rtl8150_disconnect(struct usb_interface *intf)
 926 {
 927         rtl8150_t *dev = usb_get_intfdata(intf);
 928
 929         usb_set_intfdata(intf, NULL);
 930         if (dev) {
 931                 set_bit(RTL8150_UNPLUG, &dev->flags);
 932                 tasklet_kill(&dev->tl);
 933                 unregister_netdev(dev->netdev);
 934                 unlink_all_urbs(dev);
 935                 free_all_urbs(dev);
 936                 free_skb_pool(dev);
 937                 dev_kfree_skb(dev->rx_skb);
 938                 kfree(dev->intr_buff);
 939                 free_netdev(dev->netdev);
 940         }
 941 }
 942
 943 static struct usb_driver rtl8150_driver = {
 944         .name           = driver_name,
 945         .probe          = rtl8150_probe,
 946         .disconnect     = rtl8150_disconnect,
 947         .id_table       = rtl8150_table,
 948         .suspend        = rtl8150_suspend,
 949         .resume         = rtl8150_resume,
 950         .disable_hub_initiated_lpm = 1,
 951 };
 952
 953 module_usb_driver(rtl8150_driver);
 954
 955 MODULE_AUTHOR(DRIVER_AUTHOR);
 956 MODULE_DESCRIPTION(DRIVER_DESC);
 957 MODULE_LICENSE("GPL");