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/signal.h> 10 #include <linux/slab.h> 11 #include <linux/module.h> 12 #include <linux/netdevice.h> 13 #include <linux/etherdevice.h> 14 #include <linux/mii.h> 15 #include <linux/ethtool.h> 16 #include <linux/usb.h> 17 #include <linux/uaccess.h> 18 19 /* Version Information */ 20 #define DRIVER_VERSION "v0.6.2 (2004/08/27)" 21 #define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>" 22 #define DRIVER_DESC "rtl8150 based usb-ethernet driver" 23 24 #define IDR 0x0120 25 #define MAR 0x0126 26 #define CR 0x012e 27 #define TCR 0x012f 28 #define RCR 0x0130 29 #define TSR 0x0132 30 #define RSR 0x0133 31 #define CON0 0x0135 32 #define CON1 0x0136 33 #define MSR 0x0137 34 #define PHYADD 0x0138 35 #define PHYDAT 0x0139 36 #define PHYCNT 0x013b 37 #define GPPC 0x013d 38 #define BMCR 0x0140 39 #define BMSR 0x0142 40 #define ANAR 0x0144 41 #define ANLP 0x0146 42 #define AER 0x0148 43 #define CSCR 0x014C /* This one has the link status */ 44 #define CSCR_LINK_STATUS (1 << 3) 45 46 #define IDR_EEPROM 0x1202 47 48 #define PHY_READ 0 49 #define PHY_WRITE 0x20 50 #define PHY_GO 0x40 51 52 #define MII_TIMEOUT 10 53 #define INTBUFSIZE 8 54 55 #define RTL8150_REQT_READ 0xc0 56 #define RTL8150_REQT_WRITE 0x40 57 #define RTL8150_REQ_GET_REGS 0x05 58 #define RTL8150_REQ_SET_REGS 0x05 59 60 61 /* Transmit status register errors */ 62 #define TSR_ECOL (1<<5) 63 #define TSR_LCOL (1<<4) 64 #define TSR_LOSS_CRS (1<<3) 65 #define TSR_JBR (1<<2) 66 #define TSR_ERRORS (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR) 67 /* Receive status register errors */ 68 #define RSR_CRC (1<<2) 69 #define RSR_FAE (1<<1) 70 #define RSR_ERRORS (RSR_CRC | RSR_FAE) 71 72 /* Media status register definitions */ 73 #define MSR_DUPLEX (1<<4) 74 #define MSR_SPEED (1<<3) 75 #define MSR_LINK (1<<2) 76 77 /* Interrupt pipe data */ 78 #define INT_TSR 0x00 79 #define INT_RSR 0x01 80 #define INT_MSR 0x02 81 #define INT_WAKSR 0x03 82 #define INT_TXOK_CNT 0x04 83 #define INT_RXLOST_CNT 0x05 84 #define INT_CRERR_CNT 0x06 85 #define INT_COL_CNT 0x07 86 87 88 #define RTL8150_MTU 1540 89 #define RTL8150_TX_TIMEOUT (HZ) 90 #define RX_SKB_POOL_SIZE 4 91 92 /* rtl8150 flags */ 93 #define RTL8150_HW_CRC 0 94 #define RX_REG_SET 1 95 #define RTL8150_UNPLUG 2 96 #define RX_URB_FAIL 3 97 98 /* Define these values to match your device */ 99 #define VENDOR_ID_REALTEK 0x0bda 100 #define VENDOR_ID_MELCO 0x0411 101 #define VENDOR_ID_MICRONET 0x3980 102 #define VENDOR_ID_LONGSHINE 0x07b8 103 #define VENDOR_ID_OQO 0x1557 104 #define VENDOR_ID_ZYXEL 0x0586 105 106 #define PRODUCT_ID_RTL8150 0x8150 107 #define PRODUCT_ID_LUAKTX 0x0012 108 #define PRODUCT_ID_LCS8138TX 0x401a 109 #define PRODUCT_ID_SP128AR 0x0003 110 #define PRODUCT_ID_PRESTIGE 0x401a 111 112 #undef EEPROM_WRITE 113 114 /* table of devices that work with this driver */ 115 static const struct usb_device_id rtl8150_table[] = { 116 {USB_DEVICE(VENDOR_ID_REALTEK, PRODUCT_ID_RTL8150)}, 117 {USB_DEVICE(VENDOR_ID_MELCO, PRODUCT_ID_LUAKTX)}, 118 {USB_DEVICE(VENDOR_ID_MICRONET, PRODUCT_ID_SP128AR)}, 119 {USB_DEVICE(VENDOR_ID_LONGSHINE, PRODUCT_ID_LCS8138TX)}, 120 {USB_DEVICE(VENDOR_ID_OQO, PRODUCT_ID_RTL8150)}, 121 {USB_DEVICE(VENDOR_ID_ZYXEL, PRODUCT_ID_PRESTIGE)}, 122 {} 123 }; 124 125 MODULE_DEVICE_TABLE(usb, rtl8150_table); 126 127 struct rtl8150 { 128 unsigned long flags; 129 struct usb_device *udev; 130 struct tasklet_struct tl; 131 struct net_device *netdev; 132 struct urb *rx_urb, *tx_urb, *intr_urb; 133 struct sk_buff *tx_skb, *rx_skb; 134 struct sk_buff *rx_skb_pool[RX_SKB_POOL_SIZE]; 135 spinlock_t rx_pool_lock; 136 struct usb_ctrlrequest dr; 137 int intr_interval; 138 u8 *intr_buff; 139 u8 phy; 140 }; 141 142 typedef struct rtl8150 rtl8150_t; 143 144 struct async_req { 145 struct usb_ctrlrequest dr; 146 u16 rx_creg; 147 }; 148 149 static const char driver_name [] = "rtl8150"; 150 151 /* 152 ** 153 ** device related part of the code 154 ** 155 */ 156 static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data) 157 { 158 void *buf; 159 int ret; 160 161 buf = kmalloc(size, GFP_NOIO); 162 if (!buf) 163 return -ENOMEM; 164 165 ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), 166 RTL8150_REQ_GET_REGS, RTL8150_REQT_READ, 167 indx, 0, buf, size, 500); 168 if (ret > 0 && ret <= size) 169 memcpy(data, buf, ret); 170 kfree(buf); 171 return ret; 172 } 173 174 static int set_registers(rtl8150_t * dev, u16 indx, u16 size, const void *data) 175 { 176 void *buf; 177 int ret; 178 179 buf = kmemdup(data, size, GFP_NOIO); 180 if (!buf) 181 return -ENOMEM; 182 183 ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), 184 RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE, 185 indx, 0, buf, size, 500); 186 kfree(buf); 187 return ret; 188 } 189 190 static void async_set_reg_cb(struct urb *urb) 191 { 192 struct async_req *req = (struct async_req *)urb->context; 193 int status = urb->status; 194 195 if (status < 0) 196 dev_dbg(&urb->dev->dev, "%s failed with %d", __func__, status); 197 kfree(req); 198 usb_free_urb(urb); 199 } 200 201 static int async_set_registers(rtl8150_t *dev, u16 indx, u16 size, u16 reg) 202 { 203 int res = -ENOMEM; 204 struct urb *async_urb; 205 struct async_req *req; 206 207 req = kmalloc(sizeof(struct async_req), GFP_ATOMIC); 208 if (req == NULL) 209 return res; 210 async_urb = usb_alloc_urb(0, GFP_ATOMIC); 211 if (async_urb == NULL) { 212 kfree(req); 213 return res; 214 } 215 req->rx_creg = cpu_to_le16(reg); 216 req->dr.bRequestType = RTL8150_REQT_WRITE; 217 req->dr.bRequest = RTL8150_REQ_SET_REGS; 218 req->dr.wIndex = 0; 219 req->dr.wValue = cpu_to_le16(indx); 220 req->dr.wLength = cpu_to_le16(size); 221 usb_fill_control_urb(async_urb, dev->udev, 222 usb_sndctrlpipe(dev->udev, 0), (void *)&req->dr, 223 &req->rx_creg, size, async_set_reg_cb, req); 224 res = usb_submit_urb(async_urb, GFP_ATOMIC); 225 if (res) { 226 if (res == -ENODEV) 227 netif_device_detach(dev->netdev); 228 dev_err(&dev->udev->dev, "%s failed with %d\n", __func__, res); 229 } 230 return res; 231 } 232 233 static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg) 234 { 235 int i; 236 u8 data[3], tmp; 237 238 data[0] = phy; 239 data[1] = data[2] = 0; 240 tmp = indx | PHY_READ | PHY_GO; 241 i = 0; 242 243 set_registers(dev, PHYADD, sizeof(data), data); 244 set_registers(dev, PHYCNT, 1, &tmp); 245 do { 246 get_registers(dev, PHYCNT, 1, data); 247 } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT)); 248 249 if (i <= MII_TIMEOUT) { 250 get_registers(dev, PHYDAT, 2, data); 251 *reg = data[0] | (data[1] << 8); 252 return 0; 253 } else 254 return 1; 255 } 256 257 static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg) 258 { 259 int i; 260 u8 data[3], tmp; 261 262 data[0] = phy; 263 data[1] = reg & 0xff; 264 data[2] = (reg >> 8) & 0xff; 265 tmp = indx | PHY_WRITE | PHY_GO; 266 i = 0; 267 268 set_registers(dev, PHYADD, sizeof(data), data); 269 set_registers(dev, PHYCNT, 1, &tmp); 270 do { 271 get_registers(dev, PHYCNT, 1, data); 272 } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT)); 273 274 if (i <= MII_TIMEOUT) 275 return 0; 276 else 277 return 1; 278 } 279 280 static inline void set_ethernet_addr(rtl8150_t * dev) 281 { 282 u8 node_id[6]; 283 284 get_registers(dev, IDR, sizeof(node_id), node_id); 285 memcpy(dev->netdev->dev_addr, node_id, sizeof(node_id)); 286 } 287 288 static int rtl8150_set_mac_address(struct net_device *netdev, void *p) 289 { 290 struct sockaddr *addr = p; 291 rtl8150_t *dev = netdev_priv(netdev); 292 293 if (netif_running(netdev)) 294 return -EBUSY; 295 296 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); 297 netdev_dbg(netdev, "Setting MAC address to %pM\n", netdev->dev_addr); 298 /* Set the IDR registers. */ 299 set_registers(dev, IDR, netdev->addr_len, netdev->dev_addr); 300 #ifdef EEPROM_WRITE 301 { 302 int i; 303 u8 cr; 304 /* Get the CR contents. */ 305 get_registers(dev, CR, 1, &cr); 306 /* Set the WEPROM bit (eeprom write enable). */ 307 cr |= 0x20; 308 set_registers(dev, CR, 1, &cr); 309 /* Write the MAC address into eeprom. Eeprom writes must be word-sized, 310 so we need to split them up. */ 311 for (i = 0; i * 2 < netdev->addr_len; i++) { 312 set_registers(dev, IDR_EEPROM + (i * 2), 2, 313 netdev->dev_addr + (i * 2)); 314 } 315 /* Clear the WEPROM bit (preventing accidental eeprom writes). */ 316 cr &= 0xdf; 317 set_registers(dev, CR, 1, &cr); 318 } 319 #endif 320 return 0; 321 } 322 323 static int rtl8150_reset(rtl8150_t * dev) 324 { 325 u8 data = 0x10; 326 int i = HZ; 327 328 set_registers(dev, CR, 1, &data); 329 do { 330 get_registers(dev, CR, 1, &data); 331 } while ((data & 0x10) && --i); 332 333 return (i > 0) ? 1 : 0; 334 } 335 336 static int alloc_all_urbs(rtl8150_t * dev) 337 { 338 dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL); 339 if (!dev->rx_urb) 340 return 0; 341 dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 342 if (!dev->tx_urb) { 343 usb_free_urb(dev->rx_urb); 344 return 0; 345 } 346 dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL); 347 if (!dev->intr_urb) { 348 usb_free_urb(dev->rx_urb); 349 usb_free_urb(dev->tx_urb); 350 return 0; 351 } 352 353 return 1; 354 } 355 356 static void free_all_urbs(rtl8150_t * dev) 357 { 358 usb_free_urb(dev->rx_urb); 359 usb_free_urb(dev->tx_urb); 360 usb_free_urb(dev->intr_urb); 361 } 362 363 static void unlink_all_urbs(rtl8150_t * dev) 364 { 365 usb_kill_urb(dev->rx_urb); 366 usb_kill_urb(dev->tx_urb); 367 usb_kill_urb(dev->intr_urb); 368 } 369 370 static inline struct sk_buff *pull_skb(rtl8150_t *dev) 371 { 372 struct sk_buff *skb; 373 int i; 374 375 for (i = 0; i < RX_SKB_POOL_SIZE; i++) { 376 if (dev->rx_skb_pool[i]) { 377 skb = dev->rx_skb_pool[i]; 378 dev->rx_skb_pool[i] = NULL; 379 return skb; 380 } 381 } 382 return NULL; 383 } 384 385 static void read_bulk_callback(struct urb *urb) 386 { 387 rtl8150_t *dev; 388 unsigned pkt_len, res; 389 struct sk_buff *skb; 390 struct net_device *netdev; 391 u16 rx_stat; 392 int status = urb->status; 393 int result; 394 395 dev = urb->context; 396 if (!dev) 397 return; 398 if (test_bit(RTL8150_UNPLUG, &dev->flags)) 399 return; 400 netdev = dev->netdev; 401 if (!netif_device_present(netdev)) 402 return; 403 404 switch (status) { 405 case 0: 406 break; 407 case -ENOENT: 408 return; /* the urb is in unlink state */ 409 case -ETIME: 410 if (printk_ratelimit()) 411 dev_warn(&urb->dev->dev, "may be reset is needed?..\n"); 412 goto goon; 413 default: 414 if (printk_ratelimit()) 415 dev_warn(&urb->dev->dev, "Rx status %d\n", status); 416 goto goon; 417 } 418 419 if (!dev->rx_skb) 420 goto resched; 421 /* protect against short packets (tell me why we got some?!?) */ 422 if (urb->actual_length < 4) 423 goto goon; 424 425 res = urb->actual_length; 426 rx_stat = le16_to_cpu(*(__le16 *)(urb->transfer_buffer + res - 4)); 427 pkt_len = res - 4; 428 429 skb_put(dev->rx_skb, pkt_len); 430 dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev); 431 netif_rx(dev->rx_skb); 432 netdev->stats.rx_packets++; 433 netdev->stats.rx_bytes += pkt_len; 434 435 spin_lock(&dev->rx_pool_lock); 436 skb = pull_skb(dev); 437 spin_unlock(&dev->rx_pool_lock); 438 if (!skb) 439 goto resched; 440 441 dev->rx_skb = skb; 442 goon: 443 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1), 444 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev); 445 result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC); 446 if (result == -ENODEV) 447 netif_device_detach(dev->netdev); 448 else if (result) { 449 set_bit(RX_URB_FAIL, &dev->flags); 450 goto resched; 451 } else { 452 clear_bit(RX_URB_FAIL, &dev->flags); 453 } 454 455 return; 456 resched: 457 tasklet_schedule(&dev->tl); 458 } 459 460 static void write_bulk_callback(struct urb *urb) 461 { 462 rtl8150_t *dev; 463 int status = urb->status; 464 465 dev = urb->context; 466 if (!dev) 467 return; 468 dev_kfree_skb_irq(dev->tx_skb); 469 if (!netif_device_present(dev->netdev)) 470 return; 471 if (status) 472 dev_info(&urb->dev->dev, "%s: Tx status %d\n", 473 dev->netdev->name, status); 474 netif_trans_update(dev->netdev); 475 netif_wake_queue(dev->netdev); 476 } 477 478 static void intr_callback(struct urb *urb) 479 { 480 rtl8150_t *dev; 481 __u8 *d; 482 int status = urb->status; 483 int res; 484 485 dev = urb->context; 486 if (!dev) 487 return; 488 switch (status) { 489 case 0: /* success */ 490 break; 491 case -ECONNRESET: /* unlink */ 492 case -ENOENT: 493 case -ESHUTDOWN: 494 return; 495 /* -EPIPE: should clear the halt */ 496 default: 497 dev_info(&urb->dev->dev, "%s: intr status %d\n", 498 dev->netdev->name, status); 499 goto resubmit; 500 } 501 502 d = urb->transfer_buffer; 503 if (d[0] & TSR_ERRORS) { 504 dev->netdev->stats.tx_errors++; 505 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR)) 506 dev->netdev->stats.tx_aborted_errors++; 507 if (d[INT_TSR] & TSR_LCOL) 508 dev->netdev->stats.tx_window_errors++; 509 if (d[INT_TSR] & TSR_LOSS_CRS) 510 dev->netdev->stats.tx_carrier_errors++; 511 } 512 /* Report link status changes to the network stack */ 513 if ((d[INT_MSR] & MSR_LINK) == 0) { 514 if (netif_carrier_ok(dev->netdev)) { 515 netif_carrier_off(dev->netdev); 516 netdev_dbg(dev->netdev, "%s: LINK LOST\n", __func__); 517 } 518 } else { 519 if (!netif_carrier_ok(dev->netdev)) { 520 netif_carrier_on(dev->netdev); 521 netdev_dbg(dev->netdev, "%s: LINK CAME BACK\n", __func__); 522 } 523 } 524 525 resubmit: 526 res = usb_submit_urb (urb, GFP_ATOMIC); 527 if (res == -ENODEV) 528 netif_device_detach(dev->netdev); 529 else if (res) 530 dev_err(&dev->udev->dev, 531 "can't resubmit intr, %s-%s/input0, status %d\n", 532 dev->udev->bus->bus_name, dev->udev->devpath, res); 533 } 534 535 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message) 536 { 537 rtl8150_t *dev = usb_get_intfdata(intf); 538 539 netif_device_detach(dev->netdev); 540 541 if (netif_running(dev->netdev)) { 542 usb_kill_urb(dev->rx_urb); 543 usb_kill_urb(dev->intr_urb); 544 } 545 return 0; 546 } 547 548 static int rtl8150_resume(struct usb_interface *intf) 549 { 550 rtl8150_t *dev = usb_get_intfdata(intf); 551 552 netif_device_attach(dev->netdev); 553 if (netif_running(dev->netdev)) { 554 dev->rx_urb->status = 0; 555 dev->rx_urb->actual_length = 0; 556 read_bulk_callback(dev->rx_urb); 557 558 dev->intr_urb->status = 0; 559 dev->intr_urb->actual_length = 0; 560 intr_callback(dev->intr_urb); 561 } 562 return 0; 563 } 564 565 /* 566 ** 567 ** network related part of the code 568 ** 569 */ 570 571 static void fill_skb_pool(rtl8150_t *dev) 572 { 573 struct sk_buff *skb; 574 int i; 575 576 for (i = 0; i < RX_SKB_POOL_SIZE; i++) { 577 if (dev->rx_skb_pool[i]) 578 continue; 579 skb = dev_alloc_skb(RTL8150_MTU + 2); 580 if (!skb) { 581 return; 582 } 583 skb_reserve(skb, 2); 584 dev->rx_skb_pool[i] = skb; 585 } 586 } 587 588 static void free_skb_pool(rtl8150_t *dev) 589 { 590 int i; 591 592 for (i = 0; i < RX_SKB_POOL_SIZE; i++) 593 if (dev->rx_skb_pool[i]) 594 dev_kfree_skb(dev->rx_skb_pool[i]); 595 } 596 597 static void rx_fixup(unsigned long data) 598 { 599 struct rtl8150 *dev = (struct rtl8150 *)data; 600 struct sk_buff *skb; 601 int status; 602 603 spin_lock_irq(&dev->rx_pool_lock); 604 fill_skb_pool(dev); 605 spin_unlock_irq(&dev->rx_pool_lock); 606 if (test_bit(RX_URB_FAIL, &dev->flags)) 607 if (dev->rx_skb) 608 goto try_again; 609 spin_lock_irq(&dev->rx_pool_lock); 610 skb = pull_skb(dev); 611 spin_unlock_irq(&dev->rx_pool_lock); 612 if (skb == NULL) 613 goto tlsched; 614 dev->rx_skb = skb; 615 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1), 616 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev); 617 try_again: 618 status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC); 619 if (status == -ENODEV) { 620 netif_device_detach(dev->netdev); 621 } else if (status) { 622 set_bit(RX_URB_FAIL, &dev->flags); 623 goto tlsched; 624 } else { 625 clear_bit(RX_URB_FAIL, &dev->flags); 626 } 627 628 return; 629 tlsched: 630 tasklet_schedule(&dev->tl); 631 } 632 633 static int enable_net_traffic(rtl8150_t * dev) 634 { 635 u8 cr, tcr, rcr, msr; 636 637 if (!rtl8150_reset(dev)) { 638 dev_warn(&dev->udev->dev, "device reset failed\n"); 639 } 640 /* RCR bit7=1 attach Rx info at the end; =0 HW CRC (which is broken) */ 641 rcr = 0x9e; 642 tcr = 0xd8; 643 cr = 0x0c; 644 if (!(rcr & 0x80)) 645 set_bit(RTL8150_HW_CRC, &dev->flags); 646 set_registers(dev, RCR, 1, &rcr); 647 set_registers(dev, TCR, 1, &tcr); 648 set_registers(dev, CR, 1, &cr); 649 get_registers(dev, MSR, 1, &msr); 650 651 return 0; 652 } 653 654 static void disable_net_traffic(rtl8150_t * dev) 655 { 656 u8 cr; 657 658 get_registers(dev, CR, 1, &cr); 659 cr &= 0xf3; 660 set_registers(dev, CR, 1, &cr); 661 } 662 663 static void rtl8150_tx_timeout(struct net_device *netdev) 664 { 665 rtl8150_t *dev = netdev_priv(netdev); 666 dev_warn(&netdev->dev, "Tx timeout.\n"); 667 usb_unlink_urb(dev->tx_urb); 668 netdev->stats.tx_errors++; 669 } 670 671 static void rtl8150_set_multicast(struct net_device *netdev) 672 { 673 rtl8150_t *dev = netdev_priv(netdev); 674 u16 rx_creg = 0x9e; 675 676 netif_stop_queue(netdev); 677 if (netdev->flags & IFF_PROMISC) { 678 rx_creg |= 0x0001; 679 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name); 680 } else if (!netdev_mc_empty(netdev) || 681 (netdev->flags & IFF_ALLMULTI)) { 682 rx_creg &= 0xfffe; 683 rx_creg |= 0x0002; 684 dev_info(&netdev->dev, "%s: allmulti set\n", netdev->name); 685 } else { 686 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */ 687 rx_creg &= 0x00fc; 688 } 689 async_set_registers(dev, RCR, sizeof(rx_creg), rx_creg); 690 netif_wake_queue(netdev); 691 } 692 693 static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb, 694 struct net_device *netdev) 695 { 696 rtl8150_t *dev = netdev_priv(netdev); 697 int count, res; 698 699 netif_stop_queue(netdev); 700 count = (skb->len < 60) ? 60 : skb->len; 701 count = (count & 0x3f) ? count : count + 1; 702 dev->tx_skb = skb; 703 usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2), 704 skb->data, count, write_bulk_callback, dev); 705 if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) { 706 /* Can we get/handle EPIPE here? */ 707 if (res == -ENODEV) 708 netif_device_detach(dev->netdev); 709 else { 710 dev_warn(&netdev->dev, "failed tx_urb %d\n", res); 711 netdev->stats.tx_errors++; 712 netif_start_queue(netdev); 713 } 714 } else { 715 netdev->stats.tx_packets++; 716 netdev->stats.tx_bytes += skb->len; 717 netif_trans_update(netdev); 718 } 719 720 return NETDEV_TX_OK; 721 } 722 723 724 static void set_carrier(struct net_device *netdev) 725 { 726 rtl8150_t *dev = netdev_priv(netdev); 727 short tmp; 728 729 get_registers(dev, CSCR, 2, &tmp); 730 if (tmp & CSCR_LINK_STATUS) 731 netif_carrier_on(netdev); 732 else 733 netif_carrier_off(netdev); 734 } 735 736 static int rtl8150_open(struct net_device *netdev) 737 { 738 rtl8150_t *dev = netdev_priv(netdev); 739 int res; 740 741 if (dev->rx_skb == NULL) 742 dev->rx_skb = pull_skb(dev); 743 if (!dev->rx_skb) 744 return -ENOMEM; 745 746 set_registers(dev, IDR, 6, netdev->dev_addr); 747 748 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1), 749 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev); 750 if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) { 751 if (res == -ENODEV) 752 netif_device_detach(dev->netdev); 753 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res); 754 return res; 755 } 756 usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3), 757 dev->intr_buff, INTBUFSIZE, intr_callback, 758 dev, dev->intr_interval); 759 if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) { 760 if (res == -ENODEV) 761 netif_device_detach(dev->netdev); 762 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res); 763 usb_kill_urb(dev->rx_urb); 764 return res; 765 } 766 enable_net_traffic(dev); 767 set_carrier(netdev); 768 netif_start_queue(netdev); 769 770 return res; 771 } 772 773 static int rtl8150_close(struct net_device *netdev) 774 { 775 rtl8150_t *dev = netdev_priv(netdev); 776 777 netif_stop_queue(netdev); 778 if (!test_bit(RTL8150_UNPLUG, &dev->flags)) 779 disable_net_traffic(dev); 780 unlink_all_urbs(dev); 781 782 return 0; 783 } 784 785 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info) 786 { 787 rtl8150_t *dev = netdev_priv(netdev); 788 789 strlcpy(info->driver, driver_name, sizeof(info->driver)); 790 strlcpy(info->version, DRIVER_VERSION, sizeof(info->version)); 791 usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info)); 792 } 793 794 static int rtl8150_get_link_ksettings(struct net_device *netdev, 795 struct ethtool_link_ksettings *ecmd) 796 { 797 rtl8150_t *dev = netdev_priv(netdev); 798 short lpa, bmcr; 799 u32 supported; 800 801 supported = (SUPPORTED_10baseT_Half | 802 SUPPORTED_10baseT_Full | 803 SUPPORTED_100baseT_Half | 804 SUPPORTED_100baseT_Full | 805 SUPPORTED_Autoneg | 806 SUPPORTED_TP | SUPPORTED_MII); 807 ecmd->base.port = PORT_TP; 808 ecmd->base.phy_address = dev->phy; 809 get_registers(dev, BMCR, 2, &bmcr); 810 get_registers(dev, ANLP, 2, &lpa); 811 if (bmcr & BMCR_ANENABLE) { 812 u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ? 813 SPEED_100 : SPEED_10); 814 ecmd->base.speed = speed; 815 ecmd->base.autoneg = AUTONEG_ENABLE; 816 if (speed == SPEED_100) 817 ecmd->base.duplex = (lpa & LPA_100FULL) ? 818 DUPLEX_FULL : DUPLEX_HALF; 819 else 820 ecmd->base.duplex = (lpa & LPA_10FULL) ? 821 DUPLEX_FULL : DUPLEX_HALF; 822 } else { 823 ecmd->base.autoneg = AUTONEG_DISABLE; 824 ecmd->base.speed = ((bmcr & BMCR_SPEED100) ? 825 SPEED_100 : SPEED_10); 826 ecmd->base.duplex = (bmcr & BMCR_FULLDPLX) ? 827 DUPLEX_FULL : DUPLEX_HALF; 828 } 829 830 ethtool_convert_legacy_u32_to_link_mode(ecmd->link_modes.supported, 831 supported); 832 833 return 0; 834 } 835 836 static const struct ethtool_ops ops = { 837 .get_drvinfo = rtl8150_get_drvinfo, 838 .get_link = ethtool_op_get_link, 839 .get_link_ksettings = rtl8150_get_link_ksettings, 840 }; 841 842 static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd) 843 { 844 rtl8150_t *dev = netdev_priv(netdev); 845 u16 *data = (u16 *) & rq->ifr_ifru; 846 int res = 0; 847 848 switch (cmd) { 849 case SIOCDEVPRIVATE: 850 data[0] = dev->phy; 851 case SIOCDEVPRIVATE + 1: 852 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]); 853 break; 854 case SIOCDEVPRIVATE + 2: 855 if (!capable(CAP_NET_ADMIN)) 856 return -EPERM; 857 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]); 858 break; 859 default: 860 res = -EOPNOTSUPP; 861 } 862 863 return res; 864 } 865 866 static const struct net_device_ops rtl8150_netdev_ops = { 867 .ndo_open = rtl8150_open, 868 .ndo_stop = rtl8150_close, 869 .ndo_do_ioctl = rtl8150_ioctl, 870 .ndo_start_xmit = rtl8150_start_xmit, 871 .ndo_tx_timeout = rtl8150_tx_timeout, 872 .ndo_set_rx_mode = rtl8150_set_multicast, 873 .ndo_set_mac_address = rtl8150_set_mac_address, 874 875 .ndo_validate_addr = eth_validate_addr, 876 }; 877 878 static int rtl8150_probe(struct usb_interface *intf, 879 const struct usb_device_id *id) 880 { 881 struct usb_device *udev = interface_to_usbdev(intf); 882 rtl8150_t *dev; 883 struct net_device *netdev; 884 885 netdev = alloc_etherdev(sizeof(rtl8150_t)); 886 if (!netdev) 887 return -ENOMEM; 888 889 dev = netdev_priv(netdev); 890 891 dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL); 892 if (!dev->intr_buff) { 893 free_netdev(netdev); 894 return -ENOMEM; 895 } 896 897 tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev); 898 spin_lock_init(&dev->rx_pool_lock); 899 900 dev->udev = udev; 901 dev->netdev = netdev; 902 netdev->netdev_ops = &rtl8150_netdev_ops; 903 netdev->watchdog_timeo = RTL8150_TX_TIMEOUT; 904 netdev->ethtool_ops = &ops; 905 dev->intr_interval = 100; /* 100ms */ 906 907 if (!alloc_all_urbs(dev)) { 908 dev_err(&intf->dev, "out of memory\n"); 909 goto out; 910 } 911 if (!rtl8150_reset(dev)) { 912 dev_err(&intf->dev, "couldn't reset the device\n"); 913 goto out1; 914 } 915 fill_skb_pool(dev); 916 set_ethernet_addr(dev); 917 918 usb_set_intfdata(intf, dev); 919 SET_NETDEV_DEV(netdev, &intf->dev); 920 if (register_netdev(netdev) != 0) { 921 dev_err(&intf->dev, "couldn't register the device\n"); 922 goto out2; 923 } 924 925 dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name); 926 927 return 0; 928 929 out2: 930 usb_set_intfdata(intf, NULL); 931 free_skb_pool(dev); 932 out1: 933 free_all_urbs(dev); 934 out: 935 kfree(dev->intr_buff); 936 free_netdev(netdev); 937 return -EIO; 938 } 939 940 static void rtl8150_disconnect(struct usb_interface *intf) 941 { 942 rtl8150_t *dev = usb_get_intfdata(intf); 943 944 usb_set_intfdata(intf, NULL); 945 if (dev) { 946 set_bit(RTL8150_UNPLUG, &dev->flags); 947 tasklet_kill(&dev->tl); 948 unregister_netdev(dev->netdev); 949 unlink_all_urbs(dev); 950 free_all_urbs(dev); 951 free_skb_pool(dev); 952 if (dev->rx_skb) 953 dev_kfree_skb(dev->rx_skb); 954 kfree(dev->intr_buff); 955 free_netdev(dev->netdev); 956 } 957 } 958 959 static struct usb_driver rtl8150_driver = { 960 .name = driver_name, 961 .probe = rtl8150_probe, 962 .disconnect = rtl8150_disconnect, 963 .id_table = rtl8150_table, 964 .suspend = rtl8150_suspend, 965 .resume = rtl8150_resume, 966 .disable_hub_initiated_lpm = 1, 967 }; 968 969 module_usb_driver(rtl8150_driver); 970 971 MODULE_AUTHOR(DRIVER_AUTHOR); 972 MODULE_DESCRIPTION(DRIVER_DESC); 973 MODULE_LICENSE("GPL"); 974