drivers/usb/net/rtl8150.c

   1 /*
   2  *  Copyright (c) 2002 Petko Manolov (petkan@users.sourceforge.net)
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * version 2 as published by the Free Software Foundation.
   7  */
   8
   9 #include <linux/sched.h>
  10 #include <linux/init.h>
  11 #include <linux/signal.h>
  12 #include <linux/slab.h>
  13 #include <linux/module.h>
  14 #include <linux/netdevice.h>
  15 #include <linux/etherdevice.h>
  16 #include <linux/mii.h>
  17 #include <linux/ethtool.h>
  18 #include <linux/usb.h>
  19 #include <asm/uaccess.h>
  20
  21 /* Version Information */
  22 #define DRIVER_VERSION "v0.6.2 (2004/08/27)"
  23 #define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>"
  24 #define DRIVER_DESC "rtl8150 based usb-ethernet driver"
  25
  26 #define IDR                     0x0120
  27 #define MAR                     0x0126
  28 #define CR                      0x012e
  29 #define TCR                     0x012f
  30 #define RCR                     0x0130
  31 #define TSR                     0x0132
  32 #define RSR                     0x0133
  33 #define CON0                    0x0135
  34 #define CON1                    0x0136
  35 #define MSR                     0x0137
  36 #define PHYADD                  0x0138
  37 #define PHYDAT                  0x0139
  38 #define PHYCNT                  0x013b
  39 #define GPPC                    0x013d
  40 #define BMCR                    0x0140
  41 #define BMSR                    0x0142
  42 #define ANAR                    0x0144
  43 #define ANLP                    0x0146
  44 #define AER                     0x0148
  45 #define CSCR                    0x014C  /* This one has the link status */
  46 #define CSCR_LINK_STATUS        (1 << 3)
  47
  48 #define IDR_EEPROM              0x1202
  49
  50 #define PHY_READ                0
  51 #define PHY_WRITE               0x20
  52 #define PHY_GO                  0x40
  53
  54 #define MII_TIMEOUT             10
  55 #define INTBUFSIZE              8
  56
  57 #define RTL8150_REQT_READ       0xc0
  58 #define RTL8150_REQT_WRITE      0x40
  59 #define RTL8150_REQ_GET_REGS    0x05
  60 #define RTL8150_REQ_SET_REGS    0x05
  61
  62
  63 /* Transmit status register errors */
  64 #define TSR_ECOL                (1<<5)
  65 #define TSR_LCOL                (1<<4)
  66 #define TSR_LOSS_CRS            (1<<3)
  67 #define TSR_JBR                 (1<<2)
  68 #define TSR_ERRORS              (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
  69 /* Receive status register errors */
  70 #define RSR_CRC                 (1<<2)
  71 #define RSR_FAE                 (1<<1)
  72 #define RSR_ERRORS              (RSR_CRC | RSR_FAE)
  73
  74 /* Media status register definitions */
  75 #define MSR_DUPLEX              (1<<4)
  76 #define MSR_SPEED               (1<<3)
  77 #define MSR_LINK                (1<<2)
  78
  79 /* Interrupt pipe data */
  80 #define INT_TSR                 0x00
  81 #define INT_RSR                 0x01
  82 #define INT_MSR                 0x02
  83 #define INT_WAKSR               0x03
  84 #define INT_TXOK_CNT            0x04
  85 #define INT_RXLOST_CNT          0x05
  86 #define INT_CRERR_CNT           0x06
  87 #define INT_COL_CNT             0x07
  88
  89 /* Transmit status register errors */
  90 #define TSR_ECOL                (1<<5)
  91 #define TSR_LCOL                (1<<4)
  92 #define TSR_LOSS_CRS            (1<<3)
  93 #define TSR_JBR                 (1<<2)
  94 #define TSR_ERRORS              (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR)
  95 /* Receive status register errors */
  96 #define RSR_CRC                 (1<<2)
  97 #define RSR_FAE                 (1<<1)
  98 #define RSR_ERRORS              (RSR_CRC | RSR_FAE)
  99
 100 /* Media status register definitions */
 101 #define MSR_DUPLEX              (1<<4)
 102 #define MSR_SPEED               (1<<3)
 103 #define MSR_LINK                (1<<2)
 104
 105 /* Interrupt pipe data */
 106 #define INT_TSR                 0x00
 107 #define INT_RSR                 0x01
 108 #define INT_MSR                 0x02
 109 #define INT_WAKSR               0x03
 110 #define INT_TXOK_CNT            0x04
 111 #define INT_RXLOST_CNT          0x05
 112 #define INT_CRERR_CNT           0x06
 113 #define INT_COL_CNT             0x07
 114
 115
 116 #define RTL8150_MTU             1540
 117 #define RTL8150_TX_TIMEOUT      (HZ)
 118 #define RX_SKB_POOL_SIZE        4
 119
 120 /* rtl8150 flags */
 121 #define RTL8150_HW_CRC          0
 122 #define RX_REG_SET              1
 123 #define RTL8150_UNPLUG          2
 124 #define RX_URB_FAIL             3
 125
 126 /* Define these values to match your device */
 127 #define VENDOR_ID_REALTEK               0x0bda
 128 #define VENDOR_ID_MELCO                 0x0411
 129 #define VENDOR_ID_MICRONET              0x3980
 130 #define VENDOR_ID_LONGSHINE             0x07b8
 131 #define VENDOR_ID_ZYXEL                 0x0586
 132
 133 #define PRODUCT_ID_RTL8150              0x8150
 134 #define PRODUCT_ID_LUAKTX               0x0012
 135 #define PRODUCT_ID_LCS8138TX            0x401a
 136 #define PRODUCT_ID_SP128AR              0x0003
 137 #define PRODUCT_ID_PRESTIGE             0x401a
 138
 139 #undef  EEPROM_WRITE
 140
 141 /* table of devices that work with this driver */
 142 static struct usb_device_id rtl8150_table[] = {
 143         {USB_DEVICE(VENDOR_ID_REALTEK, PRODUCT_ID_RTL8150)},
 144         {USB_DEVICE(VENDOR_ID_MELCO, PRODUCT_ID_LUAKTX)},
 145         {USB_DEVICE(VENDOR_ID_MICRONET, PRODUCT_ID_SP128AR)},
 146         {USB_DEVICE(VENDOR_ID_LONGSHINE, PRODUCT_ID_LCS8138TX)},
 147         {USB_DEVICE(VENDOR_ID_ZYXEL, PRODUCT_ID_PRESTIGE)},
 148         {}
 149 };
 150
 151 MODULE_DEVICE_TABLE(usb, rtl8150_table);
 152
 153 struct rtl8150 {
 154         unsigned long flags;
 155         struct usb_device *udev;
 156         struct tasklet_struct tl;
 157         struct net_device_stats stats;
 158         struct net_device *netdev;
 159         struct urb *rx_urb, *tx_urb, *intr_urb, *ctrl_urb;
 160         struct sk_buff *tx_skb, *rx_skb;
 161         struct sk_buff *rx_skb_pool[RX_SKB_POOL_SIZE];
 162         spinlock_t rx_pool_lock;
 163         struct usb_ctrlrequest dr;
 164         int intr_interval;
 165         __le16 rx_creg;
 166         u8 *intr_buff;
 167         u8 phy;
 168 };
 169
 170 typedef struct rtl8150 rtl8150_t;
 171
 172 static void fill_skb_pool(rtl8150_t *);
 173 static void free_skb_pool(rtl8150_t *);
 174 static inline struct sk_buff *pull_skb(rtl8150_t *);
 175 static void rtl8150_disconnect(struct usb_interface *intf);
 176 static int rtl8150_probe(struct usb_interface *intf,
 177                            const struct usb_device_id *id);
 178 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message);
 179 static int rtl8150_resume(struct usb_interface *intf);
 180
 181 static const char driver_name [] = "rtl8150";
 182
 183 static struct usb_driver rtl8150_driver = {
 184         .name =         driver_name,
 185         .probe =        rtl8150_probe,
 186         .disconnect =   rtl8150_disconnect,
 187         .id_table =     rtl8150_table,
 188         .suspend =      rtl8150_suspend,
 189         .resume =       rtl8150_resume
 190 };
 191
 192 /*
 193 **
 194 **      device related part of the code
 195 **
 196 */
 197 static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
 198 {
 199         return usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
 200                                RTL8150_REQ_GET_REGS, RTL8150_REQT_READ,
 201                                indx, 0, data, size, 500);
 202 }
 203
 204 static int set_registers(rtl8150_t * dev, u16 indx, u16 size, void *data)
 205 {
 206         return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
 207                                RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE,
 208                                indx, 0, data, size, 500);
 209 }
 210
 211 static void ctrl_callback(struct urb *urb)
 212 {
 213         rtl8150_t *dev;
 214
 215         switch (urb->status) {
 216         case 0:
 217                 break;
 218         case -EINPROGRESS:
 219                 break;
 220         case -ENOENT:
 221                 break;
 222         default:
 223                 warn("ctrl urb status %d", urb->status);
 224         }
 225         dev = urb->context;
 226         clear_bit(RX_REG_SET, &dev->flags);
 227 }
 228
 229 static int async_set_registers(rtl8150_t * dev, u16 indx, u16 size)
 230 {
 231         int ret;
 232
 233         if (test_bit(RX_REG_SET, &dev->flags))
 234                 return -EAGAIN;
 235
 236         dev->dr.bRequestType = RTL8150_REQT_WRITE;
 237         dev->dr.bRequest = RTL8150_REQ_SET_REGS;
 238         dev->dr.wValue = cpu_to_le16(indx);
 239         dev->dr.wIndex = 0;
 240         dev->dr.wLength = cpu_to_le16(size);
 241         dev->ctrl_urb->transfer_buffer_length = size;
 242         usb_fill_control_urb(dev->ctrl_urb, dev->udev,
 243                          usb_sndctrlpipe(dev->udev, 0), (char *) &dev->dr,
 244                          &dev->rx_creg, size, ctrl_callback, dev);
 245         if ((ret = usb_submit_urb(dev->ctrl_urb, GFP_ATOMIC))) {
 246                 if (ret == -ENODEV)
 247                         netif_device_detach(dev->netdev);
 248                 err("control request submission failed: %d", ret);
 249         } else
 250                 set_bit(RX_REG_SET, &dev->flags);
 251
 252         return ret;
 253 }
 254
 255 static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg)
 256 {
 257         int i;
 258         u8 data[3], tmp;
 259
 260         data[0] = phy;
 261         data[1] = data[2] = 0;
 262         tmp = indx | PHY_READ | 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                 get_registers(dev, PHYDAT, 2, data);
 273                 *reg = data[0] | (data[1] << 8);
 274                 return 0;
 275         } else
 276                 return 1;
 277 }
 278
 279 static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg)
 280 {
 281         int i;
 282         u8 data[3], tmp;
 283
 284         data[0] = phy;
 285         *(data + 1) = cpu_to_le16p(&reg);
 286         tmp = indx | PHY_WRITE | PHY_GO;
 287         i = 0;
 288
 289         set_registers(dev, PHYADD, sizeof(data), data);
 290         set_registers(dev, PHYCNT, 1, &tmp);
 291         do {
 292                 get_registers(dev, PHYCNT, 1, data);
 293         } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT));
 294
 295         if (i < MII_TIMEOUT)
 296                 return 0;
 297         else
 298                 return 1;
 299 }
 300
 301 static inline void set_ethernet_addr(rtl8150_t * dev)
 302 {
 303         u8 node_id[6];
 304
 305         get_registers(dev, IDR, sizeof(node_id), node_id);
 306         memcpy(dev->netdev->dev_addr, node_id, sizeof(node_id));
 307 }
 308
 309 static int rtl8150_set_mac_address(struct net_device *netdev, void *p)
 310 {
 311         struct sockaddr *addr = p;
 312         rtl8150_t *dev = netdev_priv(netdev);
 313         int i;
 314
 315         if (netif_running(netdev))
 316                 return -EBUSY;
 317
 318         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 319         dbg("%s: Setting MAC address to ", netdev->name);
 320         for (i = 0; i < 5; i++)
 321                 dbg("%02X:", netdev->dev_addr[i]);
 322         dbg("%02X\n", netdev->dev_addr[i]);
 323         /* Set the IDR registers. */
 324         set_registers(dev, IDR, sizeof(netdev->dev_addr), netdev->dev_addr);
 325 #ifdef EEPROM_WRITE
 326         {
 327         u8 cr;
 328         /* Get the CR contents. */
 329         get_registers(dev, CR, 1, &cr);
 330         /* Set the WEPROM bit (eeprom write enable). */
 331         cr |= 0x20;
 332         set_registers(dev, CR, 1, &cr);
 333         /* Write the MAC address into eeprom. Eeprom writes must be word-sized,
 334            so we need to split them up. */
 335         for (i = 0; i * 2 < netdev->addr_len; i++) {
 336                 set_registers(dev, IDR_EEPROM + (i * 2), 2,
 337                 netdev->dev_addr + (i * 2));
 338         }
 339         /* Clear the WEPROM bit (preventing accidental eeprom writes). */
 340         cr &= 0xdf;
 341         set_registers(dev, CR, 1, &cr);
 342         }
 343 #endif
 344         return 0;
 345 }
 346
 347 static int rtl8150_reset(rtl8150_t * dev)
 348 {
 349         u8 data = 0x10;
 350         int i = HZ;
 351
 352         set_registers(dev, CR, 1, &data);
 353         do {
 354                 get_registers(dev, CR, 1, &data);
 355         } while ((data & 0x10) && --i);
 356
 357         return (i > 0) ? 1 : 0;
 358 }
 359
 360 static int alloc_all_urbs(rtl8150_t * dev)
 361 {
 362         dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 363         if (!dev->rx_urb)
 364                 return 0;
 365         dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
 366         if (!dev->tx_urb) {
 367                 usb_free_urb(dev->rx_urb);
 368                 return 0;
 369         }
 370         dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL);
 371         if (!dev->intr_urb) {
 372                 usb_free_urb(dev->rx_urb);
 373                 usb_free_urb(dev->tx_urb);
 374                 return 0;
 375         }
 376         dev->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
 377         if (!dev->intr_urb) {
 378                 usb_free_urb(dev->rx_urb);
 379                 usb_free_urb(dev->tx_urb);
 380                 usb_free_urb(dev->intr_urb);
 381                 return 0;
 382         }
 383
 384         return 1;
 385 }
 386
 387 static void free_all_urbs(rtl8150_t * dev)
 388 {
 389         usb_free_urb(dev->rx_urb);
 390         usb_free_urb(dev->tx_urb);
 391         usb_free_urb(dev->intr_urb);
 392         usb_free_urb(dev->ctrl_urb);
 393 }
 394
 395 static void unlink_all_urbs(rtl8150_t * dev)
 396 {
 397         usb_kill_urb(dev->rx_urb);
 398         usb_kill_urb(dev->tx_urb);
 399         usb_kill_urb(dev->intr_urb);
 400         usb_kill_urb(dev->ctrl_urb);
 401 }
 402
 403 static inline struct sk_buff *pull_skb(rtl8150_t *dev)
 404 {
 405         struct sk_buff *skb;
 406         int i;
 407
 408         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 409                 if (dev->rx_skb_pool[i]) {
 410                         skb = dev->rx_skb_pool[i];
 411                         dev->rx_skb_pool[i] = NULL;
 412                         return skb;
 413                 }
 414         }
 415         return NULL;
 416 }
 417
 418 static void read_bulk_callback(struct urb *urb)
 419 {
 420         rtl8150_t *dev;
 421         unsigned pkt_len, res;
 422         struct sk_buff *skb;
 423         struct net_device *netdev;
 424         u16 rx_stat;
 425         int status;
 426
 427         dev = urb->context;
 428         if (!dev)
 429                 return;
 430         if (test_bit(RTL8150_UNPLUG, &dev->flags))
 431                 return;
 432         netdev = dev->netdev;
 433         if (!netif_device_present(netdev))
 434                 return;
 435
 436         switch (urb->status) {
 437         case 0:
 438                 break;
 439         case -ENOENT:
 440                 return; /* the urb is in unlink state */
 441         case -ETIME:
 442                 warn("may be reset is needed?..");
 443                 goto goon;
 444         default:
 445                 warn("Rx status %d", urb->status);
 446                 goto goon;
 447         }
 448
 449         if (!dev->rx_skb)
 450                 goto resched;
 451         /* protect against short packets (tell me why we got some?!?) */
 452         if (urb->actual_length < 4)
 453                 goto goon;
 454
 455         res = urb->actual_length;
 456         rx_stat = le16_to_cpu(*(__le16 *)(urb->transfer_buffer + res - 4));
 457         pkt_len = res - 4;
 458
 459         skb_put(dev->rx_skb, pkt_len);
 460         dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev);
 461         netif_rx(dev->rx_skb);
 462         dev->stats.rx_packets++;
 463         dev->stats.rx_bytes += pkt_len;
 464
 465         spin_lock(&dev->rx_pool_lock);
 466         skb = pull_skb(dev);
 467         spin_unlock(&dev->rx_pool_lock);
 468         if (!skb)
 469                 goto resched;
 470
 471         dev->rx_skb = skb;
 472 goon:
 473         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 474                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 475         status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
 476         if (status == -ENODEV)
 477                 netif_device_detach(dev->netdev);
 478         else if (status) {
 479                 set_bit(RX_URB_FAIL, &dev->flags);
 480                 goto resched;
 481         } else {
 482                 clear_bit(RX_URB_FAIL, &dev->flags);
 483         }
 484
 485         return;
 486 resched:
 487         tasklet_schedule(&dev->tl);
 488 }
 489
 490 static void rx_fixup(unsigned long data)
 491 {
 492         rtl8150_t *dev;
 493         struct sk_buff *skb;
 494         int status;
 495
 496         dev = (rtl8150_t *)data;
 497
 498         spin_lock_irq(&dev->rx_pool_lock);
 499         fill_skb_pool(dev);
 500         spin_unlock_irq(&dev->rx_pool_lock);
 501         if (test_bit(RX_URB_FAIL, &dev->flags))
 502                 if (dev->rx_skb)
 503                         goto try_again;
 504         spin_lock_irq(&dev->rx_pool_lock);
 505         skb = pull_skb(dev);
 506         spin_unlock_irq(&dev->rx_pool_lock);
 507         if (skb == NULL)
 508                 goto tlsched;
 509         dev->rx_skb = skb;
 510         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 511                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 512 try_again:
 513         status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC);
 514         if (status == -ENODEV) {
 515                 netif_device_detach(dev->netdev);
 516         } else if (status) {
 517                 set_bit(RX_URB_FAIL, &dev->flags);
 518                 goto tlsched;
 519         } else {
 520                 clear_bit(RX_URB_FAIL, &dev->flags);
 521         }
 522
 523         return;
 524 tlsched:
 525         tasklet_schedule(&dev->tl);
 526 }
 527
 528 static void write_bulk_callback(struct urb *urb)
 529 {
 530         rtl8150_t *dev;
 531
 532         dev = urb->context;
 533         if (!dev)
 534                 return;
 535         dev_kfree_skb_irq(dev->tx_skb);
 536         if (!netif_device_present(dev->netdev))
 537                 return;
 538         if (urb->status)
 539                 info("%s: Tx status %d", dev->netdev->name, urb->status);
 540         dev->netdev->trans_start = jiffies;
 541         netif_wake_queue(dev->netdev);
 542 }
 543
 544 static void intr_callback(struct urb *urb)
 545 {
 546         rtl8150_t *dev;
 547         __u8 *d;
 548         int status;
 549
 550         dev = urb->context;
 551         if (!dev)
 552                 return;
 553         switch (urb->status) {
 554         case 0:                 /* success */
 555                 break;
 556         case -ECONNRESET:       /* unlink */
 557         case -ENOENT:
 558         case -ESHUTDOWN:
 559                 return;
 560         /* -EPIPE:  should clear the halt */
 561         default:
 562                 info("%s: intr status %d", dev->netdev->name, urb->status);
 563                 goto resubmit;
 564         }
 565
 566         d = urb->transfer_buffer;
 567         if (d[0] & TSR_ERRORS) {
 568                 dev->stats.tx_errors++;
 569                 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR))
 570                         dev->stats.tx_aborted_errors++;
 571                 if (d[INT_TSR] & TSR_LCOL)
 572                         dev->stats.tx_window_errors++;
 573                 if (d[INT_TSR] & TSR_LOSS_CRS)
 574                         dev->stats.tx_carrier_errors++;
 575         }
 576         /* Report link status changes to the network stack */
 577         if ((d[INT_MSR] & MSR_LINK) == 0) {
 578                 if (netif_carrier_ok(dev->netdev)) {
 579                         netif_carrier_off(dev->netdev);
 580                         dbg("%s: LINK LOST\n", __func__);
 581                 }
 582         } else {
 583                 if (!netif_carrier_ok(dev->netdev)) {
 584                         netif_carrier_on(dev->netdev);
 585                         dbg("%s: LINK CAME BACK\n", __func__);
 586                 }
 587         }
 588
 589 resubmit:
 590         status = usb_submit_urb (urb, SLAB_ATOMIC);
 591         if (status == -ENODEV)
 592                 netif_device_detach(dev->netdev);
 593         else if (status)
 594                 err ("can't resubmit intr, %s-%s/input0, status %d",
 595                                 dev->udev->bus->bus_name,
 596                                 dev->udev->devpath, status);
 597 }
 598
 599 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message)
 600 {
 601         rtl8150_t *dev = usb_get_intfdata(intf);
 602
 603         netif_device_detach(dev->netdev);
 604
 605         if (netif_running(dev->netdev)) {
 606                 usb_kill_urb(dev->rx_urb);
 607                 usb_kill_urb(dev->intr_urb);
 608         }
 609         return 0;
 610 }
 611
 612 static int rtl8150_resume(struct usb_interface *intf)
 613 {
 614         rtl8150_t *dev = usb_get_intfdata(intf);
 615
 616         netif_device_attach(dev->netdev);
 617         if (netif_running(dev->netdev)) {
 618                 dev->rx_urb->status = 0;
 619                 dev->rx_urb->actual_length = 0;
 620                 read_bulk_callback(dev->rx_urb);
 621
 622                 dev->intr_urb->status = 0;
 623                 dev->intr_urb->actual_length = 0;
 624                 intr_callback(dev->intr_urb);
 625         }
 626         return 0;
 627 }
 628
 629 /*
 630 **
 631 **      network related part of the code
 632 **
 633 */
 634
 635 static void fill_skb_pool(rtl8150_t *dev)
 636 {
 637         struct sk_buff *skb;
 638         int i;
 639
 640         for (i = 0; i < RX_SKB_POOL_SIZE; i++) {
 641                 if (dev->rx_skb_pool[i])
 642                         continue;
 643                 skb = dev_alloc_skb(RTL8150_MTU + 2);
 644                 if (!skb) {
 645                         return;
 646                 }
 647                 skb->dev = dev->netdev;
 648                 skb_reserve(skb, 2);
 649                 dev->rx_skb_pool[i] = skb;
 650         }
 651 }
 652
 653 static void free_skb_pool(rtl8150_t *dev)
 654 {
 655         int i;
 656
 657         for (i = 0; i < RX_SKB_POOL_SIZE; i++)
 658                 if (dev->rx_skb_pool[i])
 659                         dev_kfree_skb(dev->rx_skb_pool[i]);
 660 }
 661
 662 static int enable_net_traffic(rtl8150_t * dev)
 663 {
 664         u8 cr, tcr, rcr, msr;
 665
 666         if (!rtl8150_reset(dev)) {
 667                 warn("%s - device reset failed", __FUNCTION__);
 668         }
 669         /* RCR bit7=1 attach Rx info at the end;  =0 HW CRC (which is broken) */
 670         rcr = 0x9e;
 671         dev->rx_creg = cpu_to_le16(rcr);
 672         tcr = 0xd8;
 673         cr = 0x0c;
 674         if (!(rcr & 0x80))
 675                 set_bit(RTL8150_HW_CRC, &dev->flags);
 676         set_registers(dev, RCR, 1, &rcr);
 677         set_registers(dev, TCR, 1, &tcr);
 678         set_registers(dev, CR, 1, &cr);
 679         get_registers(dev, MSR, 1, &msr);
 680
 681         return 0;
 682 }
 683
 684 static void disable_net_traffic(rtl8150_t * dev)
 685 {
 686         u8 cr;
 687
 688         get_registers(dev, CR, 1, &cr);
 689         cr &= 0xf3;
 690         set_registers(dev, CR, 1, &cr);
 691 }
 692
 693 static struct net_device_stats *rtl8150_netdev_stats(struct net_device *dev)
 694 {
 695         return &((rtl8150_t *)netdev_priv(dev))->stats;
 696 }
 697
 698 static void rtl8150_tx_timeout(struct net_device *netdev)
 699 {
 700         rtl8150_t *dev = netdev_priv(netdev);
 701         warn("%s: Tx timeout.", netdev->name);
 702         usb_unlink_urb(dev->tx_urb);
 703         dev->stats.tx_errors++;
 704 }
 705
 706 static void rtl8150_set_multicast(struct net_device *netdev)
 707 {
 708         rtl8150_t *dev = netdev_priv(netdev);
 709         netif_stop_queue(netdev);
 710         if (netdev->flags & IFF_PROMISC) {
 711                 dev->rx_creg |= cpu_to_le16(0x0001);
 712                 info("%s: promiscuous mode", netdev->name);
 713         } else if (netdev->mc_count ||
 714                    (netdev->flags & IFF_ALLMULTI)) {
 715                 dev->rx_creg &= cpu_to_le16(0xfffe);
 716                 dev->rx_creg |= cpu_to_le16(0x0002);
 717                 info("%s: allmulti set", netdev->name);
 718         } else {
 719                 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */
 720                 dev->rx_creg &= cpu_to_le16(0x00fc);
 721         }
 722         async_set_registers(dev, RCR, 2);
 723         netif_wake_queue(netdev);
 724 }
 725
 726 static int rtl8150_start_xmit(struct sk_buff *skb, struct net_device *netdev)
 727 {
 728         rtl8150_t *dev = netdev_priv(netdev);
 729         int count, res;
 730
 731         netif_stop_queue(netdev);
 732         count = (skb->len < 60) ? 60 : skb->len;
 733         count = (count & 0x3f) ? count : count + 1;
 734         dev->tx_skb = skb;
 735         usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2),
 736                       skb->data, count, write_bulk_callback, dev);
 737         if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) {
 738                 /* Can we get/handle EPIPE here? */
 739                 if (res == -ENODEV)
 740                         netif_device_detach(dev->netdev);
 741                 else {
 742                         warn("failed tx_urb %d\n", res);
 743                         dev->stats.tx_errors++;
 744                         netif_start_queue(netdev);
 745                 }
 746         } else {
 747                 dev->stats.tx_packets++;
 748                 dev->stats.tx_bytes += skb->len;
 749                 netdev->trans_start = jiffies;
 750         }
 751
 752         return 0;
 753 }
 754
 755
 756 static void set_carrier(struct net_device *netdev)
 757 {
 758         rtl8150_t *dev = netdev_priv(netdev);
 759         short tmp;
 760
 761         get_registers(dev, CSCR, 2, &tmp);
 762         if (tmp & CSCR_LINK_STATUS)
 763                 netif_carrier_on(netdev);
 764         else
 765                 netif_carrier_off(netdev);
 766 }
 767
 768 static int rtl8150_open(struct net_device *netdev)
 769 {
 770         rtl8150_t *dev = netdev_priv(netdev);
 771         int res;
 772
 773         if (dev->rx_skb == NULL)
 774                 dev->rx_skb = pull_skb(dev);
 775         if (!dev->rx_skb)
 776                 return -ENOMEM;
 777
 778         set_registers(dev, IDR, 6, netdev->dev_addr);
 779
 780         usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1),
 781                       dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev);
 782         if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) {
 783                 if (res == -ENODEV)
 784                         netif_device_detach(dev->netdev);
 785                 warn("%s: rx_urb submit failed: %d", __FUNCTION__, res);
 786                 return res;
 787         }
 788         usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3),
 789                      dev->intr_buff, INTBUFSIZE, intr_callback,
 790                      dev, dev->intr_interval);
 791         if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) {
 792                 if (res == -ENODEV)
 793                         netif_device_detach(dev->netdev);
 794                 warn("%s: intr_urb submit failed: %d", __FUNCTION__, res);
 795                 usb_kill_urb(dev->rx_urb);
 796                 return res;
 797         }
 798         enable_net_traffic(dev);
 799         set_carrier(netdev);
 800         netif_start_queue(netdev);
 801
 802         return res;
 803 }
 804
 805 static int rtl8150_close(struct net_device *netdev)
 806 {
 807         rtl8150_t *dev = netdev_priv(netdev);
 808         int res = 0;
 809
 810         netif_stop_queue(netdev);
 811         if (!test_bit(RTL8150_UNPLUG, &dev->flags))
 812                 disable_net_traffic(dev);
 813         unlink_all_urbs(dev);
 814
 815         return res;
 816 }
 817
 818 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
 819 {
 820         rtl8150_t *dev = netdev_priv(netdev);
 821
 822         strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
 823         strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
 824         usb_make_path(dev->udev, info->bus_info, sizeof info->bus_info);
 825 }
 826
 827 static int rtl8150_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
 828 {
 829         rtl8150_t *dev = netdev_priv(netdev);
 830         short lpa, bmcr;
 831
 832         ecmd->supported = (SUPPORTED_10baseT_Half |
 833                           SUPPORTED_10baseT_Full |
 834                           SUPPORTED_100baseT_Half |
 835                           SUPPORTED_100baseT_Full |
 836                           SUPPORTED_Autoneg |
 837                           SUPPORTED_TP | SUPPORTED_MII);
 838         ecmd->port = PORT_TP;
 839         ecmd->transceiver = XCVR_INTERNAL;
 840         ecmd->phy_address = dev->phy;
 841         get_registers(dev, BMCR, 2, &bmcr);
 842         get_registers(dev, ANLP, 2, &lpa);
 843         if (bmcr & BMCR_ANENABLE) {
 844                 ecmd->autoneg = AUTONEG_ENABLE;
 845                 ecmd->speed = (lpa & (LPA_100HALF | LPA_100FULL)) ?
 846                              SPEED_100 : SPEED_10;
 847                 if (ecmd->speed == SPEED_100)
 848                         ecmd->duplex = (lpa & LPA_100FULL) ?
 849                             DUPLEX_FULL : DUPLEX_HALF;
 850                 else
 851                         ecmd->duplex = (lpa & LPA_10FULL) ?
 852                             DUPLEX_FULL : DUPLEX_HALF;
 853         } else {
 854                 ecmd->autoneg = AUTONEG_DISABLE;
 855                 ecmd->speed = (bmcr & BMCR_SPEED100) ?
 856                     SPEED_100 : SPEED_10;
 857                 ecmd->duplex = (bmcr & BMCR_FULLDPLX) ?
 858                     DUPLEX_FULL : DUPLEX_HALF;
 859         }
 860         return 0;
 861 }
 862
 863 static struct ethtool_ops ops = {
 864         .get_drvinfo = rtl8150_get_drvinfo,
 865         .get_settings = rtl8150_get_settings,
 866         .get_link = ethtool_op_get_link
 867 };
 868
 869 static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 870 {
 871         rtl8150_t *dev = netdev_priv(netdev);
 872         u16 *data = (u16 *) & rq->ifr_ifru;
 873         int res = 0;
 874
 875         switch (cmd) {
 876         case SIOCDEVPRIVATE:
 877                 data[0] = dev->phy;
 878         case SIOCDEVPRIVATE + 1:
 879                 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
 880                 break;
 881         case SIOCDEVPRIVATE + 2:
 882                 if (!capable(CAP_NET_ADMIN))
 883                         return -EPERM;
 884                 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]);
 885                 break;
 886         default:
 887                 res = -EOPNOTSUPP;
 888         }
 889
 890         return res;
 891 }
 892
 893 static int rtl8150_probe(struct usb_interface *intf,
 894                          const struct usb_device_id *id)
 895 {
 896         struct usb_device *udev = interface_to_usbdev(intf);
 897         rtl8150_t *dev;
 898         struct net_device *netdev;
 899
 900         netdev = alloc_etherdev(sizeof(rtl8150_t));
 901         if (!netdev) {
 902                 err("Out of memory");
 903                 return -ENOMEM;
 904         }
 905
 906         dev = netdev_priv(netdev);
 907         memset(dev, 0, sizeof(rtl8150_t));
 908
 909         dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL);
 910         if (!dev->intr_buff) {
 911                 free_netdev(netdev);
 912                 return -ENOMEM;
 913         }
 914
 915         tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev);
 916         spin_lock_init(&dev->rx_pool_lock);
 917
 918         dev->udev = udev;
 919         dev->netdev = netdev;
 920         SET_MODULE_OWNER(netdev);
 921         netdev->open = rtl8150_open;
 922         netdev->stop = rtl8150_close;
 923         netdev->do_ioctl = rtl8150_ioctl;
 924         netdev->watchdog_timeo = RTL8150_TX_TIMEOUT;
 925         netdev->tx_timeout = rtl8150_tx_timeout;
 926         netdev->hard_start_xmit = rtl8150_start_xmit;
 927         netdev->set_multicast_list = rtl8150_set_multicast;
 928         netdev->set_mac_address = rtl8150_set_mac_address;
 929         netdev->get_stats = rtl8150_netdev_stats;
 930         netdev->mtu = RTL8150_MTU;
 931         SET_ETHTOOL_OPS(netdev, &ops);
 932         dev->intr_interval = 100;       /* 100ms */
 933
 934         if (!alloc_all_urbs(dev)) {
 935                 err("out of memory");
 936                 goto out;
 937         }
 938         if (!rtl8150_reset(dev)) {
 939                 err("couldn't reset the device");
 940                 goto out1;
 941         }
 942         fill_skb_pool(dev);
 943         set_ethernet_addr(dev);
 944
 945         usb_set_intfdata(intf, dev);
 946         SET_NETDEV_DEV(netdev, &intf->dev);
 947         if (register_netdev(netdev) != 0) {
 948                 err("couldn't register the device");
 949                 goto out2;
 950         }
 951
 952         info("%s: rtl8150 is detected", netdev->name);
 953
 954         return 0;
 955
 956 out2:
 957         usb_set_intfdata(intf, NULL);
 958         free_skb_pool(dev);
 959 out1:
 960         free_all_urbs(dev);
 961 out:
 962         kfree(dev->intr_buff);
 963         free_netdev(netdev);
 964         return -EIO;
 965 }
 966
 967 static void rtl8150_disconnect(struct usb_interface *intf)
 968 {
 969         rtl8150_t *dev = usb_get_intfdata(intf);
 970
 971         usb_set_intfdata(intf, NULL);
 972         if (dev) {
 973                 set_bit(RTL8150_UNPLUG, &dev->flags);
 974                 tasklet_disable(&dev->tl);
 975                 tasklet_kill(&dev->tl);
 976                 unregister_netdev(dev->netdev);
 977                 unlink_all_urbs(dev);
 978                 free_all_urbs(dev);
 979                 free_skb_pool(dev);
 980                 if (dev->rx_skb)
 981                         dev_kfree_skb(dev->rx_skb);
 982                 kfree(dev->intr_buff);
 983                 free_netdev(dev->netdev);
 984         }
 985 }
 986
 987 static int __init usb_rtl8150_init(void)
 988 {
 989         info(DRIVER_DESC " " DRIVER_VERSION);
 990         return usb_register(&rtl8150_driver);
 991 }
 992
 993 static void __exit usb_rtl8150_exit(void)
 994 {
 995         usb_deregister(&rtl8150_driver);
 996 }
 997
 998 module_init(usb_rtl8150_init);
 999 module_exit(usb_rtl8150_exit);
1000
1001 MODULE_AUTHOR(DRIVER_AUTHOR);
1002 MODULE_DESCRIPTION(DRIVER_DESC);
1003 MODULE_LICENSE("GPL");