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 void set_ethernet_addr(rtl8150_t *dev) 278 { 279 u8 node_id[ETH_ALEN]; 280 int ret; 281 282 ret = get_registers(dev, IDR, sizeof(node_id), node_id); 283 284 if (ret == sizeof(node_id)) { 285 ether_addr_copy(dev->netdev->dev_addr, node_id); 286 } else { 287 eth_hw_addr_random(dev->netdev); 288 netdev_notice(dev->netdev, "Assigned a random MAC address: %pM\n", 289 dev->netdev->dev_addr); 290 } 291 } 292 293 static int rtl8150_set_mac_address(struct net_device *netdev, void *p) 294 { 295 struct sockaddr *addr = p; 296 rtl8150_t *dev = netdev_priv(netdev); 297 298 if (netif_running(netdev)) 299 return -EBUSY; 300 301 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); 302 netdev_dbg(netdev, "Setting MAC address to %pM\n", netdev->dev_addr); 303 /* Set the IDR registers. */ 304 set_registers(dev, IDR, netdev->addr_len, netdev->dev_addr); 305 #ifdef EEPROM_WRITE 306 { 307 int i; 308 u8 cr; 309 /* Get the CR contents. */ 310 get_registers(dev, CR, 1, &cr); 311 /* Set the WEPROM bit (eeprom write enable). */ 312 cr |= 0x20; 313 set_registers(dev, CR, 1, &cr); 314 /* Write the MAC address into eeprom. Eeprom writes must be word-sized, 315 so we need to split them up. */ 316 for (i = 0; i * 2 < netdev->addr_len; i++) { 317 set_registers(dev, IDR_EEPROM + (i * 2), 2, 318 netdev->dev_addr + (i * 2)); 319 } 320 /* Clear the WEPROM bit (preventing accidental eeprom writes). */ 321 cr &= 0xdf; 322 set_registers(dev, CR, 1, &cr); 323 } 324 #endif 325 return 0; 326 } 327 328 static int rtl8150_reset(rtl8150_t * dev) 329 { 330 u8 data = 0x10; 331 int i = HZ; 332 333 set_registers(dev, CR, 1, &data); 334 do { 335 get_registers(dev, CR, 1, &data); 336 } while ((data & 0x10) && --i); 337 338 return (i > 0) ? 1 : 0; 339 } 340 341 static int alloc_all_urbs(rtl8150_t * dev) 342 { 343 dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL); 344 if (!dev->rx_urb) 345 return 0; 346 dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 347 if (!dev->tx_urb) { 348 usb_free_urb(dev->rx_urb); 349 return 0; 350 } 351 dev->intr_urb = usb_alloc_urb(0, GFP_KERNEL); 352 if (!dev->intr_urb) { 353 usb_free_urb(dev->rx_urb); 354 usb_free_urb(dev->tx_urb); 355 return 0; 356 } 357 358 return 1; 359 } 360 361 static void free_all_urbs(rtl8150_t * dev) 362 { 363 usb_free_urb(dev->rx_urb); 364 usb_free_urb(dev->tx_urb); 365 usb_free_urb(dev->intr_urb); 366 } 367 368 static void unlink_all_urbs(rtl8150_t * dev) 369 { 370 usb_kill_urb(dev->rx_urb); 371 usb_kill_urb(dev->tx_urb); 372 usb_kill_urb(dev->intr_urb); 373 } 374 375 static inline struct sk_buff *pull_skb(rtl8150_t *dev) 376 { 377 struct sk_buff *skb; 378 int i; 379 380 for (i = 0; i < RX_SKB_POOL_SIZE; i++) { 381 if (dev->rx_skb_pool[i]) { 382 skb = dev->rx_skb_pool[i]; 383 dev->rx_skb_pool[i] = NULL; 384 return skb; 385 } 386 } 387 return NULL; 388 } 389 390 static void read_bulk_callback(struct urb *urb) 391 { 392 rtl8150_t *dev; 393 unsigned pkt_len, res; 394 struct sk_buff *skb; 395 struct net_device *netdev; 396 int status = urb->status; 397 int result; 398 unsigned long flags; 399 400 dev = urb->context; 401 if (!dev) 402 return; 403 if (test_bit(RTL8150_UNPLUG, &dev->flags)) 404 return; 405 netdev = dev->netdev; 406 if (!netif_device_present(netdev)) 407 return; 408 409 switch (status) { 410 case 0: 411 break; 412 case -ENOENT: 413 return; /* the urb is in unlink state */ 414 case -ETIME: 415 if (printk_ratelimit()) 416 dev_warn(&urb->dev->dev, "may be reset is needed?..\n"); 417 goto goon; 418 default: 419 if (printk_ratelimit()) 420 dev_warn(&urb->dev->dev, "Rx status %d\n", status); 421 goto goon; 422 } 423 424 if (!dev->rx_skb) 425 goto resched; 426 /* protect against short packets (tell me why we got some?!?) */ 427 if (urb->actual_length < 4) 428 goto goon; 429 430 res = urb->actual_length; 431 pkt_len = res - 4; 432 433 skb_put(dev->rx_skb, pkt_len); 434 dev->rx_skb->protocol = eth_type_trans(dev->rx_skb, netdev); 435 netif_rx(dev->rx_skb); 436 netdev->stats.rx_packets++; 437 netdev->stats.rx_bytes += pkt_len; 438 439 spin_lock_irqsave(&dev->rx_pool_lock, flags); 440 skb = pull_skb(dev); 441 spin_unlock_irqrestore(&dev->rx_pool_lock, flags); 442 if (!skb) 443 goto resched; 444 445 dev->rx_skb = skb; 446 goon: 447 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1), 448 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev); 449 result = usb_submit_urb(dev->rx_urb, GFP_ATOMIC); 450 if (result == -ENODEV) 451 netif_device_detach(dev->netdev); 452 else if (result) { 453 set_bit(RX_URB_FAIL, &dev->flags); 454 goto resched; 455 } else { 456 clear_bit(RX_URB_FAIL, &dev->flags); 457 } 458 459 return; 460 resched: 461 tasklet_schedule(&dev->tl); 462 } 463 464 static void write_bulk_callback(struct urb *urb) 465 { 466 rtl8150_t *dev; 467 int status = urb->status; 468 469 dev = urb->context; 470 if (!dev) 471 return; 472 dev_kfree_skb_irq(dev->tx_skb); 473 if (!netif_device_present(dev->netdev)) 474 return; 475 if (status) 476 dev_info(&urb->dev->dev, "%s: Tx status %d\n", 477 dev->netdev->name, status); 478 netif_trans_update(dev->netdev); 479 netif_wake_queue(dev->netdev); 480 } 481 482 static void intr_callback(struct urb *urb) 483 { 484 rtl8150_t *dev; 485 __u8 *d; 486 int status = urb->status; 487 int res; 488 489 dev = urb->context; 490 if (!dev) 491 return; 492 switch (status) { 493 case 0: /* success */ 494 break; 495 case -ECONNRESET: /* unlink */ 496 case -ENOENT: 497 case -ESHUTDOWN: 498 return; 499 /* -EPIPE: should clear the halt */ 500 default: 501 dev_info(&urb->dev->dev, "%s: intr status %d\n", 502 dev->netdev->name, status); 503 goto resubmit; 504 } 505 506 d = urb->transfer_buffer; 507 if (d[0] & TSR_ERRORS) { 508 dev->netdev->stats.tx_errors++; 509 if (d[INT_TSR] & (TSR_ECOL | TSR_JBR)) 510 dev->netdev->stats.tx_aborted_errors++; 511 if (d[INT_TSR] & TSR_LCOL) 512 dev->netdev->stats.tx_window_errors++; 513 if (d[INT_TSR] & TSR_LOSS_CRS) 514 dev->netdev->stats.tx_carrier_errors++; 515 } 516 /* Report link status changes to the network stack */ 517 if ((d[INT_MSR] & MSR_LINK) == 0) { 518 if (netif_carrier_ok(dev->netdev)) { 519 netif_carrier_off(dev->netdev); 520 netdev_dbg(dev->netdev, "%s: LINK LOST\n", __func__); 521 } 522 } else { 523 if (!netif_carrier_ok(dev->netdev)) { 524 netif_carrier_on(dev->netdev); 525 netdev_dbg(dev->netdev, "%s: LINK CAME BACK\n", __func__); 526 } 527 } 528 529 resubmit: 530 res = usb_submit_urb (urb, GFP_ATOMIC); 531 if (res == -ENODEV) 532 netif_device_detach(dev->netdev); 533 else if (res) 534 dev_err(&dev->udev->dev, 535 "can't resubmit intr, %s-%s/input0, status %d\n", 536 dev->udev->bus->bus_name, dev->udev->devpath, res); 537 } 538 539 static int rtl8150_suspend(struct usb_interface *intf, pm_message_t message) 540 { 541 rtl8150_t *dev = usb_get_intfdata(intf); 542 543 netif_device_detach(dev->netdev); 544 545 if (netif_running(dev->netdev)) { 546 usb_kill_urb(dev->rx_urb); 547 usb_kill_urb(dev->intr_urb); 548 } 549 return 0; 550 } 551 552 static int rtl8150_resume(struct usb_interface *intf) 553 { 554 rtl8150_t *dev = usb_get_intfdata(intf); 555 556 netif_device_attach(dev->netdev); 557 if (netif_running(dev->netdev)) { 558 dev->rx_urb->status = 0; 559 dev->rx_urb->actual_length = 0; 560 read_bulk_callback(dev->rx_urb); 561 562 dev->intr_urb->status = 0; 563 dev->intr_urb->actual_length = 0; 564 intr_callback(dev->intr_urb); 565 } 566 return 0; 567 } 568 569 /* 570 ** 571 ** network related part of the code 572 ** 573 */ 574 575 static void fill_skb_pool(rtl8150_t *dev) 576 { 577 struct sk_buff *skb; 578 int i; 579 580 for (i = 0; i < RX_SKB_POOL_SIZE; i++) { 581 if (dev->rx_skb_pool[i]) 582 continue; 583 skb = dev_alloc_skb(RTL8150_MTU + 2); 584 if (!skb) { 585 return; 586 } 587 skb_reserve(skb, 2); 588 dev->rx_skb_pool[i] = skb; 589 } 590 } 591 592 static void free_skb_pool(rtl8150_t *dev) 593 { 594 int i; 595 596 for (i = 0; i < RX_SKB_POOL_SIZE; i++) 597 dev_kfree_skb(dev->rx_skb_pool[i]); 598 } 599 600 static void rx_fixup(unsigned long data) 601 { 602 struct rtl8150 *dev = (struct rtl8150 *)data; 603 struct sk_buff *skb; 604 int status; 605 606 spin_lock_irq(&dev->rx_pool_lock); 607 fill_skb_pool(dev); 608 spin_unlock_irq(&dev->rx_pool_lock); 609 if (test_bit(RX_URB_FAIL, &dev->flags)) 610 if (dev->rx_skb) 611 goto try_again; 612 spin_lock_irq(&dev->rx_pool_lock); 613 skb = pull_skb(dev); 614 spin_unlock_irq(&dev->rx_pool_lock); 615 if (skb == NULL) 616 goto tlsched; 617 dev->rx_skb = skb; 618 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1), 619 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev); 620 try_again: 621 status = usb_submit_urb(dev->rx_urb, GFP_ATOMIC); 622 if (status == -ENODEV) { 623 netif_device_detach(dev->netdev); 624 } else if (status) { 625 set_bit(RX_URB_FAIL, &dev->flags); 626 goto tlsched; 627 } else { 628 clear_bit(RX_URB_FAIL, &dev->flags); 629 } 630 631 return; 632 tlsched: 633 tasklet_schedule(&dev->tl); 634 } 635 636 static int enable_net_traffic(rtl8150_t * dev) 637 { 638 u8 cr, tcr, rcr, msr; 639 640 if (!rtl8150_reset(dev)) { 641 dev_warn(&dev->udev->dev, "device reset failed\n"); 642 } 643 /* RCR bit7=1 attach Rx info at the end; =0 HW CRC (which is broken) */ 644 rcr = 0x9e; 645 tcr = 0xd8; 646 cr = 0x0c; 647 if (!(rcr & 0x80)) 648 set_bit(RTL8150_HW_CRC, &dev->flags); 649 set_registers(dev, RCR, 1, &rcr); 650 set_registers(dev, TCR, 1, &tcr); 651 set_registers(dev, CR, 1, &cr); 652 get_registers(dev, MSR, 1, &msr); 653 654 return 0; 655 } 656 657 static void disable_net_traffic(rtl8150_t * dev) 658 { 659 u8 cr; 660 661 get_registers(dev, CR, 1, &cr); 662 cr &= 0xf3; 663 set_registers(dev, CR, 1, &cr); 664 } 665 666 static void rtl8150_tx_timeout(struct net_device *netdev, unsigned int txqueue) 667 { 668 rtl8150_t *dev = netdev_priv(netdev); 669 dev_warn(&netdev->dev, "Tx timeout.\n"); 670 usb_unlink_urb(dev->tx_urb); 671 netdev->stats.tx_errors++; 672 } 673 674 static void rtl8150_set_multicast(struct net_device *netdev) 675 { 676 rtl8150_t *dev = netdev_priv(netdev); 677 u16 rx_creg = 0x9e; 678 679 netif_stop_queue(netdev); 680 if (netdev->flags & IFF_PROMISC) { 681 rx_creg |= 0x0001; 682 dev_info(&netdev->dev, "%s: promiscuous mode\n", netdev->name); 683 } else if (!netdev_mc_empty(netdev) || 684 (netdev->flags & IFF_ALLMULTI)) { 685 rx_creg &= 0xfffe; 686 rx_creg |= 0x0002; 687 dev_dbg(&netdev->dev, "%s: allmulti set\n", netdev->name); 688 } else { 689 /* ~RX_MULTICAST, ~RX_PROMISCUOUS */ 690 rx_creg &= 0x00fc; 691 } 692 async_set_registers(dev, RCR, sizeof(rx_creg), rx_creg); 693 netif_wake_queue(netdev); 694 } 695 696 static netdev_tx_t rtl8150_start_xmit(struct sk_buff *skb, 697 struct net_device *netdev) 698 { 699 rtl8150_t *dev = netdev_priv(netdev); 700 int count, res; 701 702 netif_stop_queue(netdev); 703 count = (skb->len < 60) ? 60 : skb->len; 704 count = (count & 0x3f) ? count : count + 1; 705 dev->tx_skb = skb; 706 usb_fill_bulk_urb(dev->tx_urb, dev->udev, usb_sndbulkpipe(dev->udev, 2), 707 skb->data, count, write_bulk_callback, dev); 708 if ((res = usb_submit_urb(dev->tx_urb, GFP_ATOMIC))) { 709 /* Can we get/handle EPIPE here? */ 710 if (res == -ENODEV) 711 netif_device_detach(dev->netdev); 712 else { 713 dev_warn(&netdev->dev, "failed tx_urb %d\n", res); 714 netdev->stats.tx_errors++; 715 netif_start_queue(netdev); 716 } 717 } else { 718 netdev->stats.tx_packets++; 719 netdev->stats.tx_bytes += skb->len; 720 netif_trans_update(netdev); 721 } 722 723 return NETDEV_TX_OK; 724 } 725 726 727 static void set_carrier(struct net_device *netdev) 728 { 729 rtl8150_t *dev = netdev_priv(netdev); 730 short tmp; 731 732 get_registers(dev, CSCR, 2, &tmp); 733 if (tmp & CSCR_LINK_STATUS) 734 netif_carrier_on(netdev); 735 else 736 netif_carrier_off(netdev); 737 } 738 739 static int rtl8150_open(struct net_device *netdev) 740 { 741 rtl8150_t *dev = netdev_priv(netdev); 742 int res; 743 744 if (dev->rx_skb == NULL) 745 dev->rx_skb = pull_skb(dev); 746 if (!dev->rx_skb) 747 return -ENOMEM; 748 749 set_registers(dev, IDR, 6, netdev->dev_addr); 750 751 usb_fill_bulk_urb(dev->rx_urb, dev->udev, usb_rcvbulkpipe(dev->udev, 1), 752 dev->rx_skb->data, RTL8150_MTU, read_bulk_callback, dev); 753 if ((res = usb_submit_urb(dev->rx_urb, GFP_KERNEL))) { 754 if (res == -ENODEV) 755 netif_device_detach(dev->netdev); 756 dev_warn(&netdev->dev, "rx_urb submit failed: %d\n", res); 757 return res; 758 } 759 usb_fill_int_urb(dev->intr_urb, dev->udev, usb_rcvintpipe(dev->udev, 3), 760 dev->intr_buff, INTBUFSIZE, intr_callback, 761 dev, dev->intr_interval); 762 if ((res = usb_submit_urb(dev->intr_urb, GFP_KERNEL))) { 763 if (res == -ENODEV) 764 netif_device_detach(dev->netdev); 765 dev_warn(&netdev->dev, "intr_urb submit failed: %d\n", res); 766 usb_kill_urb(dev->rx_urb); 767 return res; 768 } 769 enable_net_traffic(dev); 770 set_carrier(netdev); 771 netif_start_queue(netdev); 772 773 return res; 774 } 775 776 static int rtl8150_close(struct net_device *netdev) 777 { 778 rtl8150_t *dev = netdev_priv(netdev); 779 780 netif_stop_queue(netdev); 781 if (!test_bit(RTL8150_UNPLUG, &dev->flags)) 782 disable_net_traffic(dev); 783 unlink_all_urbs(dev); 784 785 return 0; 786 } 787 788 static void rtl8150_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info) 789 { 790 rtl8150_t *dev = netdev_priv(netdev); 791 792 strlcpy(info->driver, driver_name, sizeof(info->driver)); 793 strlcpy(info->version, DRIVER_VERSION, sizeof(info->version)); 794 usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info)); 795 } 796 797 static int rtl8150_get_link_ksettings(struct net_device *netdev, 798 struct ethtool_link_ksettings *ecmd) 799 { 800 rtl8150_t *dev = netdev_priv(netdev); 801 short lpa, bmcr; 802 u32 supported; 803 804 supported = (SUPPORTED_10baseT_Half | 805 SUPPORTED_10baseT_Full | 806 SUPPORTED_100baseT_Half | 807 SUPPORTED_100baseT_Full | 808 SUPPORTED_Autoneg | 809 SUPPORTED_TP | SUPPORTED_MII); 810 ecmd->base.port = PORT_TP; 811 ecmd->base.phy_address = dev->phy; 812 get_registers(dev, BMCR, 2, &bmcr); 813 get_registers(dev, ANLP, 2, &lpa); 814 if (bmcr & BMCR_ANENABLE) { 815 u32 speed = ((lpa & (LPA_100HALF | LPA_100FULL)) ? 816 SPEED_100 : SPEED_10); 817 ecmd->base.speed = speed; 818 ecmd->base.autoneg = AUTONEG_ENABLE; 819 if (speed == SPEED_100) 820 ecmd->base.duplex = (lpa & LPA_100FULL) ? 821 DUPLEX_FULL : DUPLEX_HALF; 822 else 823 ecmd->base.duplex = (lpa & LPA_10FULL) ? 824 DUPLEX_FULL : DUPLEX_HALF; 825 } else { 826 ecmd->base.autoneg = AUTONEG_DISABLE; 827 ecmd->base.speed = ((bmcr & BMCR_SPEED100) ? 828 SPEED_100 : SPEED_10); 829 ecmd->base.duplex = (bmcr & BMCR_FULLDPLX) ? 830 DUPLEX_FULL : DUPLEX_HALF; 831 } 832 833 ethtool_convert_legacy_u32_to_link_mode(ecmd->link_modes.supported, 834 supported); 835 836 return 0; 837 } 838 839 static const struct ethtool_ops ops = { 840 .get_drvinfo = rtl8150_get_drvinfo, 841 .get_link = ethtool_op_get_link, 842 .get_link_ksettings = rtl8150_get_link_ksettings, 843 }; 844 845 static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd) 846 { 847 rtl8150_t *dev = netdev_priv(netdev); 848 u16 *data = (u16 *) & rq->ifr_ifru; 849 int res = 0; 850 851 switch (cmd) { 852 case SIOCDEVPRIVATE: 853 data[0] = dev->phy; 854 fallthrough; 855 case SIOCDEVPRIVATE + 1: 856 read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]); 857 break; 858 case SIOCDEVPRIVATE + 2: 859 if (!capable(CAP_NET_ADMIN)) 860 return -EPERM; 861 write_mii_word(dev, dev->phy, (data[1] & 0x1f), data[2]); 862 break; 863 default: 864 res = -EOPNOTSUPP; 865 } 866 867 return res; 868 } 869 870 static const struct net_device_ops rtl8150_netdev_ops = { 871 .ndo_open = rtl8150_open, 872 .ndo_stop = rtl8150_close, 873 .ndo_do_ioctl = rtl8150_ioctl, 874 .ndo_start_xmit = rtl8150_start_xmit, 875 .ndo_tx_timeout = rtl8150_tx_timeout, 876 .ndo_set_rx_mode = rtl8150_set_multicast, 877 .ndo_set_mac_address = rtl8150_set_mac_address, 878 879 .ndo_validate_addr = eth_validate_addr, 880 }; 881 882 static int rtl8150_probe(struct usb_interface *intf, 883 const struct usb_device_id *id) 884 { 885 struct usb_device *udev = interface_to_usbdev(intf); 886 rtl8150_t *dev; 887 struct net_device *netdev; 888 889 netdev = alloc_etherdev(sizeof(rtl8150_t)); 890 if (!netdev) 891 return -ENOMEM; 892 893 dev = netdev_priv(netdev); 894 895 dev->intr_buff = kmalloc(INTBUFSIZE, GFP_KERNEL); 896 if (!dev->intr_buff) { 897 free_netdev(netdev); 898 return -ENOMEM; 899 } 900 901 tasklet_init(&dev->tl, rx_fixup, (unsigned long)dev); 902 spin_lock_init(&dev->rx_pool_lock); 903 904 dev->udev = udev; 905 dev->netdev = netdev; 906 netdev->netdev_ops = &rtl8150_netdev_ops; 907 netdev->watchdog_timeo = RTL8150_TX_TIMEOUT; 908 netdev->ethtool_ops = &ops; 909 dev->intr_interval = 100; /* 100ms */ 910 911 if (!alloc_all_urbs(dev)) { 912 dev_err(&intf->dev, "out of memory\n"); 913 goto out; 914 } 915 if (!rtl8150_reset(dev)) { 916 dev_err(&intf->dev, "couldn't reset the device\n"); 917 goto out1; 918 } 919 fill_skb_pool(dev); 920 set_ethernet_addr(dev); 921 922 usb_set_intfdata(intf, dev); 923 SET_NETDEV_DEV(netdev, &intf->dev); 924 if (register_netdev(netdev) != 0) { 925 dev_err(&intf->dev, "couldn't register the device\n"); 926 goto out2; 927 } 928 929 dev_info(&intf->dev, "%s: rtl8150 is detected\n", netdev->name); 930 931 return 0; 932 933 out2: 934 usb_set_intfdata(intf, NULL); 935 free_skb_pool(dev); 936 out1: 937 free_all_urbs(dev); 938 out: 939 kfree(dev->intr_buff); 940 free_netdev(netdev); 941 return -EIO; 942 } 943 944 static void rtl8150_disconnect(struct usb_interface *intf) 945 { 946 rtl8150_t *dev = usb_get_intfdata(intf); 947 948 usb_set_intfdata(intf, NULL); 949 if (dev) { 950 set_bit(RTL8150_UNPLUG, &dev->flags); 951 tasklet_kill(&dev->tl); 952 unregister_netdev(dev->netdev); 953 unlink_all_urbs(dev); 954 free_all_urbs(dev); 955 free_skb_pool(dev); 956 dev_kfree_skb(dev->rx_skb); 957 kfree(dev->intr_buff); 958 free_netdev(dev->netdev); 959 } 960 } 961 962 static struct usb_driver rtl8150_driver = { 963 .name = driver_name, 964 .probe = rtl8150_probe, 965 .disconnect = rtl8150_disconnect, 966 .id_table = rtl8150_table, 967 .suspend = rtl8150_suspend, 968 .resume = rtl8150_resume, 969 .disable_hub_initiated_lpm = 1, 970 }; 971 972 module_usb_driver(rtl8150_driver); 973 974 MODULE_AUTHOR(DRIVER_AUTHOR); 975 MODULE_DESCRIPTION(DRIVER_DESC); 976 MODULE_LICENSE("GPL"); 977