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 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 strscpy(info->driver, driver_name, sizeof(info->driver)); 773 strscpy(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 = 0; 782 short bmcr = 0; 783 u32 supported; 784 785 supported = (SUPPORTED_10baseT_Half | 786 SUPPORTED_10baseT_Full | 787 SUPPORTED_100baseT_Half | 788 SUPPORTED_100baseT_Full | 789 SUPPORTED_Autoneg | 790 SUPPORTED_TP | SUPPORTED_MII); 791 ecmd->base.port = PORT_TP; 792 ecmd->base.phy_address = dev->phy; 793 get_registers(dev, BMCR, 2, &bmcr); 794 get_registers(dev, ANLP, 2, &lpa); 795 if (bmcr & BMCR_ANENABLE) { 796 u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ? 797 SPEED_100 : SPEED_10); 798 ecmd->base.speed = speed; 799 ecmd->base.autoneg = AUTONEG_ENABLE; 800 if (speed == SPEED_100) 801 ecmd->base.duplex = (lpa & LPA_100FULL) ? 802 DUPLEX_FULL : DUPLEX_HALF; 803 else 804 ecmd->base.duplex = (lpa & LPA_10FULL) ? 805 DUPLEX_FULL : DUPLEX_HALF; 806 } else { 807 ecmd->base.autoneg = AUTONEG_DISABLE; 808 ecmd->base.speed = ((bmcr & BMCR_SPEED100) ? 809 SPEED_100 : SPEED_10); 810 ecmd->base.duplex = (bmcr & BMCR_FULLDPLX) ? 811 DUPLEX_FULL : DUPLEX_HALF; 812 } 813 814 ethtool_convert_legacy_u32_to_link_mode(ecmd->link_modes.supported, 815 supported); 816 817 return 0; 818 } 819 820 static const struct ethtool_ops ops = { 821 .get_drvinfo = rtl8150_get_drvinfo, 822 .get_link = ethtool_op_get_link, 823 .get_link_ksettings = rtl8150_get_link_ksettings, 824 }; 825 826 static int rtl8150_siocdevprivate(struct net_device *netdev, struct ifreq *rq, 827 void __user *udata, int cmd) 828 { 829 rtl8150_t *dev = netdev_priv(netdev); 830 u16 *data = (u16 *) & rq->ifr_ifru; 831 int res = 0; 832 833 switch (cmd) { 834 case SIOCDEVPRIVATE: 835 data[0] = dev->phy; 836 fallthrough; 837 case SIOCDEVPRIVATE + 1: 838 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]); 839 break; 840 case SIOCDEVPRIVATE + 2: 841 if (!capable(CAP_NET_ADMIN)) 842 return -EPERM; 843 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]); 844 break; 845 default: 846 res = -EOPNOTSUPP; 847 } 848 849 return res; 850 } 851 852 static const struct net_device_ops rtl8150_netdev_ops = { 853 .ndo_open = rtl8150_open, 854 .ndo_stop = rtl8150_close, 855 .ndo_siocdevprivate = rtl8150_siocdevprivate, 856 .ndo_start_xmit = rtl8150_start_xmit, 857 .ndo_tx_timeout = rtl8150_tx_timeout, 858 .ndo_set_rx_mode = rtl8150_set_multicast, 859 .ndo_set_mac_address = rtl8150_set_mac_address, 860 861 .ndo_validate_addr = eth_validate_addr, 862 }; 863 864 static int rtl8150_probe(struct usb_interface *intf, 865 const struct usb_device_id *id) 866 { 867 struct usb_device *udev = interface_to_usbdev(intf); 868 rtl8150_t *dev; 869 struct net_device *netdev; 870 871 netdev = alloc_etherdev(sizeof(rtl8150_t)); 872 if (!netdev) 873 return -ENOMEM; 874 875 dev = netdev_priv(netdev); 876 877 dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL); 878 if (!dev->intr_buff) { 879 free_netdev(netdev); 880 return -ENOMEM; 881 } 882 883 tasklet_setup(&dev->tl, rx_fixup); 884 spin_lock_init(&dev->rx_pool_lock); 885 886 dev->udev = udev; 887 dev->netdev = netdev; 888 netdev->netdev_ops = &rtl8150_netdev_ops; 889 netdev->watchdog_timeo = RTL8150_TX_TIMEOUT; 890 netdev->ethtool_ops = &ops; 891 dev->intr_interval = 100; /* 100ms */ 892 893 if (!alloc_all_urbs(dev)) { 894 dev_err(&intf->dev, "out of memory\n"); 895 goto out; 896 } 897 if (!rtl8150_reset(dev)) { 898 dev_err(&intf->dev, "couldn't reset the device\n"); 899 goto out1; 900 } 901 fill_skb_pool(dev); 902 set_ethernet_addr(dev); 903 904 usb_set_intfdata(intf, dev); 905 SET_NETDEV_DEV(netdev, &intf->dev); 906 if (register_netdev(netdev) != 0) { 907 dev_err(&intf->dev, "couldn't register the device\n"); 908 goto out2; 909 } 910 911 dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name); 912 913 return 0; 914 915 out2: 916 usb_set_intfdata(intf, NULL); 917 free_skb_pool(dev); 918 out1: 919 free_all_urbs(dev); 920 out: 921 kfree(dev->intr_buff); 922 free_netdev(netdev); 923 return -EIO; 924 } 925 926 static void rtl8150_disconnect(struct usb_interface *intf) 927 { 928 rtl8150_t *dev = usb_get_intfdata(intf); 929 930 usb_set_intfdata(intf, NULL); 931 if (dev) { 932 set_bit(RTL8150_UNPLUG, &dev->flags); 933 tasklet_kill(&dev->tl); 934 unregister_netdev(dev->netdev); 935 unlink_all_urbs(dev); 936 free_all_urbs(dev); 937 free_skb_pool(dev); 938 dev_kfree_skb(dev->rx_skb); 939 kfree(dev->intr_buff); 940 free_netdev(dev->netdev); 941 } 942 } 943 944 static struct usb_driver rtl8150_driver = { 945 .name = driver_name, 946 .probe = rtl8150_probe, 947 .disconnect = rtl8150_disconnect, 948 .id_table = rtl8150_table, 949 .suspend = rtl8150_suspend, 950 .resume = rtl8150_resume, 951 .disable_hub_initiated_lpm = 1, 952 }; 953 954 module_usb_driver(rtl8150_driver); 955 956 MODULE_AUTHOR(DRIVER_AUTHOR); 957 MODULE_DESCRIPTION(DRIVER_DESC); 958 MODULE_LICENSE("GPL"); 959