1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2002 Petko Manolov (petkan@users.sourceforge.net) 4 */ 5 6 #include <linux/signal.h> 7 #include <linux/slab.h> 8 #include <linux/module.h> 9 #include <linux/netdevice.h> 10 #include <linux/etherdevice.h> 11 #include <linux/mii.h> 12 #include <linux/ethtool.h> 13 #include <linux/usb.h> 14 #include <linux/uaccess.h> 15 16 /* Version Information */ 17 #define DRIVER_VERSION "v0.6.2 (2004/08/27)" 18 #define DRIVER_AUTHOR "Petko Manolov <petkan@users.sourceforge.net>" 19 #define DRIVER_DESC "rtl8150 based usb-ethernet driver" 20 21 #define IDR 0x0120 22 #define MAR 0x0126 23 #define CR 0x012e 24 #define TCR 0x012f 25 #define RCR 0x0130 26 #define TSR 0x0132 27 #define RSR 0x0133 28 #define CON0 0x0135 29 #define CON1 0x0136 30 #define MSR 0x0137 31 #define PHYADD 0x0138 32 #define PHYDAT 0x0139 33 #define PHYCNT 0x013b 34 #define GPPC 0x013d 35 #define BMCR 0x0140 36 #define BMSR 0x0142 37 #define ANAR 0x0144 38 #define ANLP 0x0146 39 #define AER 0x0148 40 #define CSCR 0x014C /* This one has the link status */ 41 #define CSCR_LINK_STATUS (1 << 3) 42 43 #define IDR_EEPROM 0x1202 44 45 #define PHY_READ 0 46 #define PHY_WRITE 0x20 47 #define PHY_GO 0x40 48 49 #define MII_TIMEOUT 10 50 #define INTBUFSIZE 8 51 52 #define RTL8150_REQT_READ 0xc0 53 #define RTL8150_REQT_WRITE 0x40 54 #define RTL8150_REQ_GET_REGS 0x05 55 #define RTL8150_REQ_SET_REGS 0x05 56 57 58 /* Transmit status register errors */ 59 #define TSR_ECOL (1<<5) 60 #define TSR_LCOL (1<<4) 61 #define TSR_LOSS_CRS (1<<3) 62 #define TSR_JBR (1<<2) 63 #define TSR_ERRORS (TSR_ECOL | TSR_LCOL | TSR_LOSS_CRS | TSR_JBR) 64 /* Receive status register errors */ 65 #define RSR_CRC (1<<2) 66 #define RSR_FAE (1<<1) 67 #define RSR_ERRORS (RSR_CRC | RSR_FAE) 68 69 /* Media status register definitions */ 70 #define MSR_DUPLEX (1<<4) 71 #define MSR_SPEED (1<<3) 72 #define MSR_LINK (1<<2) 73 74 /* Interrupt pipe data */ 75 #define INT_TSR 0x00 76 #define INT_RSR 0x01 77 #define INT_MSR 0x02 78 #define INT_WAKSR 0x03 79 #define INT_TXOK_CNT 0x04 80 #define INT_RXLOST_CNT 0x05 81 #define INT_CRERR_CNT 0x06 82 #define INT_COL_CNT 0x07 83 84 85 #define RTL8150_MTU 1540 86 #define RTL8150_TX_TIMEOUT (HZ) 87 #define RX_SKB_POOL_SIZE 4 88 89 /* rtl8150 flags */ 90 #define RTL8150_HW_CRC 0 91 #define RX_REG_SET 1 92 #define RTL8150_UNPLUG 2 93 #define RX_URB_FAIL 3 94 95 /* Define these values to match your device */ 96 #define VENDOR_ID_REALTEK 0x0bda 97 #define VENDOR_ID_MELCO 0x0411 98 #define VENDOR_ID_MICRONET 0x3980 99 #define VENDOR_ID_LONGSHINE 0x07b8 100 #define VENDOR_ID_OQO 0x1557 101 #define VENDOR_ID_ZYXEL 0x0586 102 103 #define PRODUCT_ID_RTL8150 0x8150 104 #define PRODUCT_ID_LUAKTX 0x0012 105 #define PRODUCT_ID_LCS8138TX 0x401a 106 #define PRODUCT_ID_SP128AR 0x0003 107 #define PRODUCT_ID_PRESTIGE 0x401a 108 109 #undef EEPROM_WRITE 110 111 /* table of devices that work with this driver */ 112 static const struct usb_device_id rtl8150_table[] = { 113 {USB_DEVICE(VENDOR_ID_REALTEK, PRODUCT_ID_RTL8150)}, 114 {USB_DEVICE(VENDOR_ID_MELCO, PRODUCT_ID_LUAKTX)}, 115 {USB_DEVICE(VENDOR_ID_MICRONET, PRODUCT_ID_SP128AR)}, 116 {USB_DEVICE(VENDOR_ID_LONGSHINE, PRODUCT_ID_LCS8138TX)}, 117 {USB_DEVICE(VENDOR_ID_OQO, PRODUCT_ID_RTL8150)}, 118 {USB_DEVICE(VENDOR_ID_ZYXEL, PRODUCT_ID_PRESTIGE)}, 119 {} 120 }; 121 122 MODULE_DEVICE_TABLE(usb, rtl8150_table); 123 124 struct rtl8150 { 125 unsigned long flags; 126 struct usb_device *udev; 127 struct tasklet_struct tl; 128 struct net_device *netdev; 129 struct urb *rx_urb, *tx_urb, *intr_urb; 130 struct sk_buff *tx_skb, *rx_skb; 131 struct sk_buff *rx_skb_pool[RX_SKB_POOL_SIZE]; 132 spinlock_t rx_pool_lock; 133 struct usb_ctrlrequest dr; 134 int intr_interval; 135 u8 *intr_buff; 136 u8 phy; 137 }; 138 139 typedef struct rtl8150 rtl8150_t; 140 141 struct async_req { 142 struct usb_ctrlrequest dr; 143 u16 rx_creg; 144 }; 145 146 static const char driver_name [] = "rtl8150"; 147 148 /* 149 ** 150 ** device related part of the code 151 ** 152 */ 153 static int get_registers(rtl8150_t * dev, u16 indx, u16 size, void *data) 154 { 155 void *buf; 156 int ret; 157 158 buf = kmalloc(size, GFP_NOIO); 159 if (!buf) 160 return -ENOMEM; 161 162 ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), 163 RTL8150_REQ_GET_REGS, RTL8150_REQT_READ, 164 indx, 0, buf, size, 500); 165 if (ret > 0 && ret <= size) 166 memcpy(data, buf, ret); 167 kfree(buf); 168 return ret; 169 } 170 171 static int set_registers(rtl8150_t * dev, u16 indx, u16 size, const void *data) 172 { 173 void *buf; 174 int ret; 175 176 buf = kmemdup(data, size, GFP_NOIO); 177 if (!buf) 178 return -ENOMEM; 179 180 ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), 181 RTL8150_REQ_SET_REGS, RTL8150_REQT_WRITE, 182 indx, 0, buf, size, 500); 183 kfree(buf); 184 return ret; 185 } 186 187 static void async_set_reg_cb(struct urb *urb) 188 { 189 struct async_req *req = (struct async_req *)urb->context; 190 int status = urb->status; 191 192 if (status < 0) 193 dev_dbg(&urb->dev->dev, "%s failed with %d", __func__, status); 194 kfree(req); 195 usb_free_urb(urb); 196 } 197 198 static int async_set_registers(rtl8150_t *dev, u16 indx, u16 size, u16 reg) 199 { 200 int res = -ENOMEM; 201 struct urb *async_urb; 202 struct async_req *req; 203 204 req = kmalloc(sizeof(struct async_req), GFP_ATOMIC); 205 if (req == NULL) 206 return res; 207 async_urb = usb_alloc_urb(0, GFP_ATOMIC); 208 if (async_urb == NULL) { 209 kfree(req); 210 return res; 211 } 212 req->rx_creg = cpu_to_le16(reg); 213 req->dr.bRequestType = RTL8150_REQT_WRITE; 214 req->dr.bRequest = RTL8150_REQ_SET_REGS; 215 req->dr.wIndex = 0; 216 req->dr.wValue = cpu_to_le16(indx); 217 req->dr.wLength = cpu_to_le16(size); 218 usb_fill_control_urb(async_urb, dev->udev, 219 usb_sndctrlpipe(dev->udev, 0), (void *)&req->dr, 220 &req->rx_creg, size, async_set_reg_cb, req); 221 res = usb_submit_urb(async_urb, GFP_ATOMIC); 222 if (res) { 223 if (res == -ENODEV) 224 netif_device_detach(dev->netdev); 225 dev_err(&dev->udev->dev, "%s failed with %d\n", __func__, res); 226 } 227 return res; 228 } 229 230 static int read_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 * reg) 231 { 232 int i; 233 u8 data[3], tmp; 234 235 data[0] = phy; 236 data[1] = data[2] = 0; 237 tmp = indx | PHY_READ | PHY_GO; 238 i = 0; 239 240 set_registers(dev, PHYADD, sizeof(data), data); 241 set_registers(dev, PHYCNT, 1, &tmp); 242 do { 243 get_registers(dev, PHYCNT, 1, data); 244 } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT)); 245 246 if (i <= MII_TIMEOUT) { 247 get_registers(dev, PHYDAT, 2, data); 248 *reg = data[0] | (data[1] << 8); 249 return 0; 250 } else 251 return 1; 252 } 253 254 static int write_mii_word(rtl8150_t * dev, u8 phy, __u8 indx, u16 reg) 255 { 256 int i; 257 u8 data[3], tmp; 258 259 data[0] = phy; 260 data[1] = reg & 0xff; 261 data[2] = (reg >> 8) & 0xff; 262 tmp = indx | PHY_WRITE | PHY_GO; 263 i = 0; 264 265 set_registers(dev, PHYADD, sizeof(data), data); 266 set_registers(dev, PHYCNT, 1, &tmp); 267 do { 268 get_registers(dev, PHYCNT, 1, data); 269 } while ((data[0] & PHY_GO) && (i++ < MII_TIMEOUT)); 270 271 if (i <= MII_TIMEOUT) 272 return 0; 273 else 274 return 1; 275 } 276 277 static inline void set_ethernet_addr(rtl8150_t * dev) 278 { 279 u8 node_id[6]; 280 281 get_registers(dev, IDR, sizeof(node_id), node_id); 282 memcpy(dev->netdev->dev_addr, node_id, sizeof(node_id)); 283 } 284 285 static int rtl8150_set_mac_address(struct net_device *netdev, void *p) 286 { 287 struct sockaddr *addr = p; 288 rtl8150_t *dev = netdev_priv(netdev); 289 290 if (netif_running(netdev)) 291 return -EBUSY; 292 293 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); 294 netdev_dbg(netdev, "Setting MAC address to %pM\n", netdev->dev_addr); 295 /* Set the IDR registers. */ 296 set_registers(dev, IDR, netdev->addr_len, netdev->dev_addr); 297 #ifdef EEPROM_WRITE 298 { 299 int i; 300 u8 cr; 301 /* Get the CR contents. */ 302 get_registers(dev, CR, 1, &cr); 303 /* Set the WEPROM bit (eeprom write enable). */ 304 cr |= 0x20; 305 set_registers(dev, CR, 1, &cr); 306 /* Write the MAC address into eeprom. Eeprom writes must be word-sized, 307 so we need to split them up. */ 308 for (i = 0; i * 2 < netdev->addr_len; i++) { 309 set_registers(dev, IDR_EEPROM + (i * 2), 2, 310 netdev->dev_addr + (i * 2)); 311 } 312 /* Clear the WEPROM bit (preventing accidental eeprom writes). */ 313 cr &= 0xdf; 314 set_registers(dev, CR, 1, &cr); 315 } 316 #endif 317 return 0; 318 } 319 320 static int rtl8150_reset(rtl8150_t * dev) 321 { 322 u8 data = 0x10; 323 int i = HZ; 324 325 set_registers(dev, CR, 1, &data); 326 do { 327 get_registers(dev, CR, 1, &data); 328 } while ((data & 0x10) && --i); 329 330 return (i > 0) ? 1 : 0; 331 } 332 333 static int alloc_all_urbs(rtl8150_t * dev) 334 { 335 dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL); 336 if (!dev->rx_urb) 337 return 0; 338 dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 339 if (!dev->tx_urb) { 340 usb_free_urb(dev->rx_urb); 341 return 0; 342 } 343 dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL); 344 if (!dev->intr_urb) { 345 usb_free_urb(dev->rx_urb); 346 usb_free_urb(dev->tx_urb); 347 return 0; 348 } 349 350 return 1; 351 } 352 353 static void free_all_urbs(rtl8150_t * dev) 354 { 355 usb_free_urb(dev->rx_urb); 356 usb_free_urb(dev->tx_urb); 357 usb_free_urb(dev->intr_urb); 358 } 359 360 static void unlink_all_urbs(rtl8150_t * dev) 361 { 362 usb_kill_urb(dev->rx_urb); 363 usb_kill_urb(dev->tx_urb); 364 usb_kill_urb(dev->intr_urb); 365 } 366 367 static inline struct sk_buff *pull_skb(rtl8150_t *dev) 368 { 369 struct sk_buff *skb; 370 int i; 371 372 for (i = 0; i < RX_SKB_POOL_SIZE; i++) { 373 if (dev->rx_skb_pool[i]) { 374 skb = dev->rx_skb_pool[i]; 375 dev->rx_skb_pool[i] = NULL; 376 return skb; 377 } 378 } 379 return NULL; 380 } 381 382 static void read_bulk_callback(struct urb *urb) 383 { 384 rtl8150_t *dev; 385 unsigned pkt_len, res; 386 struct sk_buff *skb; 387 struct net_device *netdev; 388 int status = urb->status; 389 int result; 390 unsigned long flags; 391 392 dev = urb->context; 393 if (!dev) 394 return; 395 if (test_bit(RTL8150_UNPLUG, &dev->flags)) 396 return; 397 netdev = dev->netdev; 398 if (!netif_device_present(netdev)) 399 return; 400 401 switch (status) { 402 case 0: 403 break; 404 case -ENOENT: 405 return; /* the urb is in unlink state */ 406 case -ETIME: 407 if (printk_ratelimit()) 408 dev_warn(&urb->dev->dev, "may be reset is needed?..\n"); 409 goto goon; 410 default: 411 if (printk_ratelimit()) 412 dev_warn(&urb->dev->dev, "Rx status %d\n", status); 413 goto goon; 414 } 415 416 if (!dev->rx_skb) 417 goto resched; 418 /* protect against short packets (tell me why we got some?!?) */ 419 if (urb->actual_length < 4) 420 goto goon; 421 422 res = urb->actual_length; 423 pkt_len = res - 4; 424 425 skb_put(dev->rx_skb, pkt_len); 426 dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev); 427 netif_rx(dev->rx_skb); 428 netdev->stats.rx_packets++; 429 netdev->stats.rx_bytes += pkt_len; 430 431 spin_lock_irqsave(&dev->rx_pool_lock, flags); 432 skb = pull_skb(dev); 433 spin_unlock_irqrestore(&dev->rx_pool_lock, flags); 434 if (!skb) 435 goto resched; 436 437 dev->rx_skb = skb; 438 goon: 439 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1), 440 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev); 441 result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC); 442 if (result == -ENODEV) 443 netif_device_detach(dev->netdev); 444 else if (result) { 445 set_bit(RX_URB_FAIL, &dev->flags); 446 goto resched; 447 } else { 448 clear_bit(RX_URB_FAIL, &dev->flags); 449 } 450 451 return; 452 resched: 453 tasklet_schedule(&dev->tl); 454 } 455 456 static void write_bulk_callback(struct urb *urb) 457 { 458 rtl8150_t *dev; 459 int status = urb->status; 460 461 dev = urb->context; 462 if (!dev) 463 return; 464 dev_kfree_skb_irq(dev->tx_skb); 465 if (!netif_device_present(dev->netdev)) 466 return; 467 if (status) 468 dev_info(&urb->dev->dev, "%s: Tx status %d\n", 469 dev->netdev->name, status); 470 netif_trans_update(dev->netdev); 471 netif_wake_queue(dev->netdev); 472 } 473 474 static void intr_callback(struct urb *urb) 475 { 476 rtl8150_t *dev; 477 __u8 *d; 478 int status = urb->status; 479 int res; 480 481 dev = urb->context; 482 if (!dev) 483 return; 484 switch (status) { 485 case 0: /* success */ 486 break; 487 case -ECONNRESET: /* unlink */ 488 case -ENOENT: 489 case -ESHUTDOWN: 490 return; 491 /* -EPIPE: should clear the halt */ 492 default: 493 dev_info(&urb->dev->dev, "%s: intr status %d\n", 494 dev->netdev->name, status); 495 goto resubmit; 496 } 497 498 d = urb->transfer_buffer; 499 if (d[0] & TSR_ERRORS) { 500 dev->netdev->stats.tx_errors++; 501 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR)) 502 dev->netdev->stats.tx_aborted_errors++; 503 if (d[INT_TSR] & TSR_LCOL) 504 dev->netdev->stats.tx_window_errors++; 505 if (d[INT_TSR] & TSR_LOSS_CRS) 506 dev->netdev->stats.tx_carrier_errors++; 507 } 508 /* Report link status changes to the network stack */ 509 if ((d[INT_MSR] & MSR_LINK) == 0) { 510 if (netif_carrier_ok(dev->netdev)) { 511 netif_carrier_off(dev->netdev); 512 netdev_dbg(dev->netdev, "%s: LINK LOST\n", __func__); 513 } 514 } else { 515 if (!netif_carrier_ok(dev->netdev)) { 516 netif_carrier_on(dev->netdev); 517 netdev_dbg(dev->netdev, "%s: LINK CAME BACK\n", __func__); 518 } 519 } 520 521 resubmit: 522 res = usb_submit_urb (urb, GFP_ATOMIC); 523 if (res == -ENODEV) 524 netif_device_detach(dev->netdev); 525 else if (res) 526 dev_err(&dev->udev->dev, 527 "can't resubmit intr, %s-%s/input0, status %d\n", 528 dev->udev->bus->bus_name, dev->udev->devpath, res); 529 } 530 531 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message) 532 { 533 rtl8150_t *dev = usb_get_intfdata(intf); 534 535 netif_device_detach(dev->netdev); 536 537 if (netif_running(dev->netdev)) { 538 usb_kill_urb(dev->rx_urb); 539 usb_kill_urb(dev->intr_urb); 540 } 541 return 0; 542 } 543 544 static int rtl8150_resume(struct usb_interface *intf) 545 { 546 rtl8150_t *dev = usb_get_intfdata(intf); 547 548 netif_device_attach(dev->netdev); 549 if (netif_running(dev->netdev)) { 550 dev->rx_urb->status = 0; 551 dev->rx_urb->actual_length = 0; 552 read_bulk_callback(dev->rx_urb); 553 554 dev->intr_urb->status = 0; 555 dev->intr_urb->actual_length = 0; 556 intr_callback(dev->intr_urb); 557 } 558 return 0; 559 } 560 561 /* 562 ** 563 ** network related part of the code 564 ** 565 */ 566 567 static void fill_skb_pool(rtl8150_t *dev) 568 { 569 struct sk_buff *skb; 570 int i; 571 572 for (i = 0; i < RX_SKB_POOL_SIZE; i++) { 573 if (dev->rx_skb_pool[i]) 574 continue; 575 skb = dev_alloc_skb(RTL8150_MTU + 2); 576 if (!skb) { 577 return; 578 } 579 skb_reserve(skb, 2); 580 dev->rx_skb_pool[i] = skb; 581 } 582 } 583 584 static void free_skb_pool(rtl8150_t *dev) 585 { 586 int i; 587 588 for (i = 0; i < RX_SKB_POOL_SIZE; i++) 589 dev_kfree_skb(dev->rx_skb_pool[i]); 590 } 591 592 static void rx_fixup(unsigned long data) 593 { 594 struct rtl8150 *dev = (struct rtl8150 *)data; 595 struct sk_buff *skb; 596 int status; 597 598 spin_lock_irq(&dev->rx_pool_lock); 599 fill_skb_pool(dev); 600 spin_unlock_irq(&dev->rx_pool_lock); 601 if (test_bit(RX_URB_FAIL, &dev->flags)) 602 if (dev->rx_skb) 603 goto try_again; 604 spin_lock_irq(&dev->rx_pool_lock); 605 skb = pull_skb(dev); 606 spin_unlock_irq(&dev->rx_pool_lock); 607 if (skb == NULL) 608 goto tlsched; 609 dev->rx_skb = skb; 610 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1), 611 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev); 612 try_again: 613 status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC); 614 if (status == -ENODEV) { 615 netif_device_detach(dev->netdev); 616 } else if (status) { 617 set_bit(RX_URB_FAIL, &dev->flags); 618 goto tlsched; 619 } else { 620 clear_bit(RX_URB_FAIL, &dev->flags); 621 } 622 623 return; 624 tlsched: 625 tasklet_schedule(&dev->tl); 626 } 627 628 static int enable_net_traffic(rtl8150_t * dev) 629 { 630 u8 cr, tcr, rcr, msr; 631 632 if (!rtl8150_reset(dev)) { 633 dev_warn(&dev->udev->dev, "device reset failed\n"); 634 } 635 /* RCR bit7=1 attach Rx info at the end; =0 HW CRC (which is broken) */ 636 rcr = 0x9e; 637 tcr = 0xd8; 638 cr = 0x0c; 639 if (!(rcr & 0x80)) 640 set_bit(RTL8150_HW_CRC, &dev->flags); 641 set_registers(dev, RCR, 1, &rcr); 642 set_registers(dev, TCR, 1, &tcr); 643 set_registers(dev, CR, 1, &cr); 644 get_registers(dev, MSR, 1, &msr); 645 646 return 0; 647 } 648 649 static void disable_net_traffic(rtl8150_t * dev) 650 { 651 u8 cr; 652 653 get_registers(dev, CR, 1, &cr); 654 cr &= 0xf3; 655 set_registers(dev, CR, 1, &cr); 656 } 657 658 static void rtl8150_tx_timeout(struct net_device *netdev) 659 { 660 rtl8150_t *dev = netdev_priv(netdev); 661 dev_warn(&netdev->dev, "Tx timeout.\n"); 662 usb_unlink_urb(dev->tx_urb); 663 netdev->stats.tx_errors++; 664 } 665 666 static void rtl8150_set_multicast(struct net_device *netdev) 667 { 668 rtl8150_t *dev = netdev_priv(netdev); 669 u16 rx_creg = 0x9e; 670 671 netif_stop_queue(netdev); 672 if (netdev->flags & IFF_PROMISC) { 673 rx_creg |= 0x0001; 674 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name); 675 } else if (!netdev_mc_empty(netdev) || 676 (netdev->flags & IFF_ALLMULTI)) { 677 rx_creg &= 0xfffe; 678 rx_creg |= 0x0002; 679 dev_dbg(&netdev->dev, "%s: allmulti set\n", netdev->name); 680 } else { 681 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */ 682 rx_creg &= 0x00fc; 683 } 684 async_set_registers(dev, RCR, sizeof(rx_creg), rx_creg); 685 netif_wake_queue(netdev); 686 } 687 688 static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb, 689 struct net_device *netdev) 690 { 691 rtl8150_t *dev = netdev_priv(netdev); 692 int count, res; 693 694 netif_stop_queue(netdev); 695 count = (skb->len < 60) ? 60 : skb->len; 696 count = (count & 0x3f) ? count : count + 1; 697 dev->tx_skb = skb; 698 usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2), 699 skb->data, count, write_bulk_callback, dev); 700 if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) { 701 /* Can we get/handle EPIPE here? */ 702 if (res == -ENODEV) 703 netif_device_detach(dev->netdev); 704 else { 705 dev_warn(&netdev->dev, "failed tx_urb %d\n", res); 706 netdev->stats.tx_errors++; 707 netif_start_queue(netdev); 708 } 709 } else { 710 netdev->stats.tx_packets++; 711 netdev->stats.tx_bytes += skb->len; 712 netif_trans_update(netdev); 713 } 714 715 return NETDEV_TX_OK; 716 } 717 718 719 static void set_carrier(struct net_device *netdev) 720 { 721 rtl8150_t *dev = netdev_priv(netdev); 722 short tmp; 723 724 get_registers(dev, CSCR, 2, &tmp); 725 if (tmp & CSCR_LINK_STATUS) 726 netif_carrier_on(netdev); 727 else 728 netif_carrier_off(netdev); 729 } 730 731 static int rtl8150_open(struct net_device *netdev) 732 { 733 rtl8150_t *dev = netdev_priv(netdev); 734 int res; 735 736 if (dev->rx_skb == NULL) 737 dev->rx_skb = pull_skb(dev); 738 if (!dev->rx_skb) 739 return -ENOMEM; 740 741 set_registers(dev, IDR, 6, netdev->dev_addr); 742 743 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1), 744 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev); 745 if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) { 746 if (res == -ENODEV) 747 netif_device_detach(dev->netdev); 748 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res); 749 return res; 750 } 751 usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3), 752 dev->intr_buff, INTBUFSIZE, intr_callback, 753 dev, dev->intr_interval); 754 if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) { 755 if (res == -ENODEV) 756 netif_device_detach(dev->netdev); 757 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res); 758 usb_kill_urb(dev->rx_urb); 759 return res; 760 } 761 enable_net_traffic(dev); 762 set_carrier(netdev); 763 netif_start_queue(netdev); 764 765 return res; 766 } 767 768 static int rtl8150_close(struct net_device *netdev) 769 { 770 rtl8150_t *dev = netdev_priv(netdev); 771 772 netif_stop_queue(netdev); 773 if (!test_bit(RTL8150_UNPLUG, &dev->flags)) 774 disable_net_traffic(dev); 775 unlink_all_urbs(dev); 776 777 return 0; 778 } 779 780 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info) 781 { 782 rtl8150_t *dev = netdev_priv(netdev); 783 784 strlcpy(info->driver, driver_name, sizeof(info->driver)); 785 strlcpy(info->version, DRIVER_VERSION, sizeof(info->version)); 786 usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info)); 787 } 788 789 static int rtl8150_get_link_ksettings(struct net_device *netdev, 790 struct ethtool_link_ksettings *ecmd) 791 { 792 rtl8150_t *dev = netdev_priv(netdev); 793 short lpa, bmcr; 794 u32 supported; 795 796 supported = (SUPPORTED_10baseT_Half | 797 SUPPORTED_10baseT_Full | 798 SUPPORTED_100baseT_Half | 799 SUPPORTED_100baseT_Full | 800 SUPPORTED_Autoneg | 801 SUPPORTED_TP | SUPPORTED_MII); 802 ecmd->base.port = PORT_TP; 803 ecmd->base.phy_address = dev->phy; 804 get_registers(dev, BMCR, 2, &bmcr); 805 get_registers(dev, ANLP, 2, &lpa); 806 if (bmcr & BMCR_ANENABLE) { 807 u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ? 808 SPEED_100 : SPEED_10); 809 ecmd->base.speed = speed; 810 ecmd->base.autoneg = AUTONEG_ENABLE; 811 if (speed == SPEED_100) 812 ecmd->base.duplex = (lpa & LPA_100FULL) ? 813 DUPLEX_FULL : DUPLEX_HALF; 814 else 815 ecmd->base.duplex = (lpa & LPA_10FULL) ? 816 DUPLEX_FULL : DUPLEX_HALF; 817 } else { 818 ecmd->base.autoneg = AUTONEG_DISABLE; 819 ecmd->base.speed = ((bmcr & BMCR_SPEED100) ? 820 SPEED_100 : SPEED_10); 821 ecmd->base.duplex = (bmcr & BMCR_FULLDPLX) ? 822 DUPLEX_FULL : DUPLEX_HALF; 823 } 824 825 ethtool_convert_legacy_u32_to_link_mode(ecmd->link_modes.supported, 826 supported); 827 828 return 0; 829 } 830 831 static const struct ethtool_ops ops = { 832 .get_drvinfo = rtl8150_get_drvinfo, 833 .get_link = ethtool_op_get_link, 834 .get_link_ksettings = rtl8150_get_link_ksettings, 835 }; 836 837 static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd) 838 { 839 rtl8150_t *dev = netdev_priv(netdev); 840 u16 *data = (u16 *) & rq->ifr_ifru; 841 int res = 0; 842 843 switch (cmd) { 844 case SIOCDEVPRIVATE: 845 data[0] = dev->phy; 846 /* fall through */ 847 case SIOCDEVPRIVATE + 1: 848 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]); 849 break; 850 case SIOCDEVPRIVATE + 2: 851 if (!capable(CAP_NET_ADMIN)) 852 return -EPERM; 853 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]); 854 break; 855 default: 856 res = -EOPNOTSUPP; 857 } 858 859 return res; 860 } 861 862 static const struct net_device_ops rtl8150_netdev_ops = { 863 .ndo_open = rtl8150_open, 864 .ndo_stop = rtl8150_close, 865 .ndo_do_ioctl = rtl8150_ioctl, 866 .ndo_start_xmit = rtl8150_start_xmit, 867 .ndo_tx_timeout = rtl8150_tx_timeout, 868 .ndo_set_rx_mode = rtl8150_set_multicast, 869 .ndo_set_mac_address = rtl8150_set_mac_address, 870 871 .ndo_validate_addr = eth_validate_addr, 872 }; 873 874 static int rtl8150_probe(struct usb_interface *intf, 875 const struct usb_device_id *id) 876 { 877 struct usb_device *udev = interface_to_usbdev(intf); 878 rtl8150_t *dev; 879 struct net_device *netdev; 880 881 netdev = alloc_etherdev(sizeof(rtl8150_t)); 882 if (!netdev) 883 return -ENOMEM; 884 885 dev = netdev_priv(netdev); 886 887 dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL); 888 if (!dev->intr_buff) { 889 free_netdev(netdev); 890 return -ENOMEM; 891 } 892 893 tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev); 894 spin_lock_init(&dev->rx_pool_lock); 895 896 dev->udev = udev; 897 dev->netdev = netdev; 898 netdev->netdev_ops = &rtl8150_netdev_ops; 899 netdev->watchdog_timeo = RTL8150_TX_TIMEOUT; 900 netdev->ethtool_ops = &ops; 901 dev->intr_interval = 100; /* 100ms */ 902 903 if (!alloc_all_urbs(dev)) { 904 dev_err(&intf->dev, "out of memory\n"); 905 goto out; 906 } 907 if (!rtl8150_reset(dev)) { 908 dev_err(&intf->dev, "couldn't reset the device\n"); 909 goto out1; 910 } 911 fill_skb_pool(dev); 912 set_ethernet_addr(dev); 913 914 usb_set_intfdata(intf, dev); 915 SET_NETDEV_DEV(netdev, &intf->dev); 916 if (register_netdev(netdev) != 0) { 917 dev_err(&intf->dev, "couldn't register the device\n"); 918 goto out2; 919 } 920 921 dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name); 922 923 return 0; 924 925 out2: 926 usb_set_intfdata(intf, NULL); 927 free_skb_pool(dev); 928 out1: 929 free_all_urbs(dev); 930 out: 931 kfree(dev->intr_buff); 932 free_netdev(netdev); 933 return -EIO; 934 } 935 936 static void rtl8150_disconnect(struct usb_interface *intf) 937 { 938 rtl8150_t *dev = usb_get_intfdata(intf); 939 940 usb_set_intfdata(intf, NULL); 941 if (dev) { 942 set_bit(RTL8150_UNPLUG, &dev->flags); 943 tasklet_kill(&dev->tl); 944 unregister_netdev(dev->netdev); 945 unlink_all_urbs(dev); 946 free_all_urbs(dev); 947 free_skb_pool(dev); 948 dev_kfree_skb(dev->rx_skb); 949 kfree(dev->intr_buff); 950 free_netdev(dev->netdev); 951 } 952 } 953 954 static struct usb_driver rtl8150_driver = { 955 .name = driver_name, 956 .probe = rtl8150_probe, 957 .disconnect = rtl8150_disconnect, 958 .id_table = rtl8150_table, 959 .suspend = rtl8150_suspend, 960 .resume = rtl8150_resume, 961 .disable_hub_initiated_lpm = 1, 962 }; 963 964 module_usb_driver(rtl8150_driver); 965 966 MODULE_AUTHOR(DRIVER_AUTHOR); 967 MODULE_DESCRIPTION(DRIVER_DESC); 968 MODULE_LICENSE("GPL"); 969