1 /**************************************************************** 2 * 3 * kaweth.c - driver for KL5KUSB101 based USB->Ethernet 4 * 5 * (c) 2000 Interlan Communications 6 * (c) 2000 Stephane Alnet 7 * (C) 2001 Brad Hards 8 * (C) 2002 Oliver Neukum 9 * 10 * Original author: The Zapman <zapman@interlan.net> 11 * Inspired by, and much credit goes to Michael Rothwell 12 * <rothwell@interlan.net> for the test equipment, help, and patience 13 * Based off of (and with thanks to) Petko Manolov's pegaus.c driver. 14 * Also many thanks to Joel Silverman and Ed Surprenant at Kawasaki 15 * for providing the firmware and driver resources. 16 * 17 * This program is free software; you can redistribute it and/or 18 * modify it under the terms of the GNU General Public License as 19 * published by the Free Software Foundation; either version 2, or 20 * (at your option) any later version. 21 * 22 * This program is distributed in the hope that it will be useful, 23 * but WITHOUT ANY WARRANTY; without even the implied warranty of 24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 25 * GNU General Public License for more details. 26 * 27 * You should have received a copy of the GNU General Public License 28 * along with this program; if not, see <http://www.gnu.org/licenses/>. 29 * 30 ****************************************************************/ 31 32 /* TODO: 33 * Develop test procedures for USB net interfaces 34 * Run test procedures 35 * Fix bugs from previous two steps 36 * Snoop other OSs for any tricks we're not doing 37 * Reduce arbitrary timeouts 38 * Smart multicast support 39 * Temporary MAC change support 40 * Tunable SOFs parameter - ioctl()? 41 * Ethernet stats collection 42 * Code formatting improvements 43 */ 44 45 #include <linux/module.h> 46 #include <linux/slab.h> 47 #include <linux/string.h> 48 #include <linux/delay.h> 49 #include <linux/netdevice.h> 50 #include <linux/etherdevice.h> 51 #include <linux/usb.h> 52 #include <linux/types.h> 53 #include <linux/ethtool.h> 54 #include <linux/dma-mapping.h> 55 #include <linux/wait.h> 56 #include <linux/firmware.h> 57 #include <linux/uaccess.h> 58 #include <asm/byteorder.h> 59 60 #undef DEBUG 61 62 #define KAWETH_MTU 1514 63 #define KAWETH_BUF_SIZE 1664 64 #define KAWETH_TX_TIMEOUT (5 * HZ) 65 #define KAWETH_SCRATCH_SIZE 32 66 #define KAWETH_FIRMWARE_BUF_SIZE 4096 67 #define KAWETH_CONTROL_TIMEOUT (30000) 68 69 #define KAWETH_STATUS_BROKEN 0x0000001 70 #define KAWETH_STATUS_CLOSING 0x0000002 71 #define KAWETH_STATUS_SUSPENDING 0x0000004 72 73 #define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING) 74 75 #define KAWETH_PACKET_FILTER_PROMISCUOUS 0x01 76 #define KAWETH_PACKET_FILTER_ALL_MULTICAST 0x02 77 #define KAWETH_PACKET_FILTER_DIRECTED 0x04 78 #define KAWETH_PACKET_FILTER_BROADCAST 0x08 79 #define KAWETH_PACKET_FILTER_MULTICAST 0x10 80 81 /* Table 7 */ 82 #define KAWETH_COMMAND_GET_ETHERNET_DESC 0x00 83 #define KAWETH_COMMAND_MULTICAST_FILTERS 0x01 84 #define KAWETH_COMMAND_SET_PACKET_FILTER 0x02 85 #define KAWETH_COMMAND_STATISTICS 0x03 86 #define KAWETH_COMMAND_SET_TEMP_MAC 0x06 87 #define KAWETH_COMMAND_GET_TEMP_MAC 0x07 88 #define KAWETH_COMMAND_SET_URB_SIZE 0x08 89 #define KAWETH_COMMAND_SET_SOFS_WAIT 0x09 90 #define KAWETH_COMMAND_SCAN 0xFF 91 92 #define KAWETH_SOFS_TO_WAIT 0x05 93 94 #define INTBUFFERSIZE 4 95 96 #define STATE_OFFSET 0 97 #define STATE_MASK 0x40 98 #define STATE_SHIFT 5 99 100 #define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED) 101 102 103 MODULE_AUTHOR("Michael Zappe <zapman@interlan.net>, Stephane Alnet <stephane@u-picardie.fr>, Brad Hards <bhards@bigpond.net.au> and Oliver Neukum <oliver@neukum.org>"); 104 MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver"); 105 MODULE_LICENSE("GPL"); 106 MODULE_FIRMWARE("kaweth/new_code.bin"); 107 MODULE_FIRMWARE("kaweth/new_code_fix.bin"); 108 MODULE_FIRMWARE("kaweth/trigger_code.bin"); 109 MODULE_FIRMWARE("kaweth/trigger_code_fix.bin"); 110 111 static const char driver_name[] = "kaweth"; 112 113 static int kaweth_probe( 114 struct usb_interface *intf, 115 const struct usb_device_id *id /* from id_table */ 116 ); 117 static void kaweth_disconnect(struct usb_interface *intf); 118 static int kaweth_internal_control_msg(struct usb_device *usb_dev, 119 unsigned int pipe, 120 struct usb_ctrlrequest *cmd, void *data, 121 int len, int timeout); 122 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message); 123 static int kaweth_resume(struct usb_interface *intf); 124 125 /**************************************************************** 126 * usb_device_id 127 ****************************************************************/ 128 static struct usb_device_id usb_klsi_table[] = { 129 { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */ 130 { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */ 131 { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */ 132 { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */ 133 { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */ 134 { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */ 135 { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */ 136 { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */ 137 { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */ 138 { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */ 139 { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */ 140 { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */ 141 { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */ 142 { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */ 143 { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */ 144 { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */ 145 { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */ 146 { USB_DEVICE(0x07c9, 0xb010) }, /* Allied Telesyn AT-USB10 USB Ethernet Adapter */ 147 { USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */ 148 { USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */ 149 { USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */ 150 { USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */ 151 { USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */ 152 { USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */ 153 { USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */ 154 { USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */ 155 { USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */ 156 { USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */ 157 { USB_DEVICE(0x1485, 0x0001) }, /* Silicom U2E */ 158 { USB_DEVICE(0x1485, 0x0002) }, /* Psion Dacom Gold Port Ethernet */ 159 { USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */ 160 { USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */ 161 { USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */ 162 { USB_DEVICE(0x1668, 0x0323) }, /* Actiontec USB Ethernet */ 163 { USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */ 164 {} /* Null terminator */ 165 }; 166 167 MODULE_DEVICE_TABLE (usb, usb_klsi_table); 168 169 /**************************************************************** 170 * kaweth_driver 171 ****************************************************************/ 172 static struct usb_driver kaweth_driver = { 173 .name = driver_name, 174 .probe = kaweth_probe, 175 .disconnect = kaweth_disconnect, 176 .suspend = kaweth_suspend, 177 .resume = kaweth_resume, 178 .id_table = usb_klsi_table, 179 .supports_autosuspend = 1, 180 .disable_hub_initiated_lpm = 1, 181 }; 182 183 typedef __u8 eth_addr_t[6]; 184 185 /**************************************************************** 186 * usb_eth_dev 187 ****************************************************************/ 188 struct usb_eth_dev { 189 char *name; 190 __u16 vendor; 191 __u16 device; 192 void *pdata; 193 }; 194 195 /**************************************************************** 196 * kaweth_ethernet_configuration 197 * Refer Table 8 198 ****************************************************************/ 199 struct kaweth_ethernet_configuration 200 { 201 __u8 size; 202 __u8 reserved1; 203 __u8 reserved2; 204 eth_addr_t hw_addr; 205 __u32 statistics_mask; 206 __le16 segment_size; 207 __u16 max_multicast_filters; 208 __u8 reserved3; 209 } __packed; 210 211 /**************************************************************** 212 * kaweth_device 213 ****************************************************************/ 214 struct kaweth_device 215 { 216 spinlock_t device_lock; 217 218 __u32 status; 219 int end; 220 int suspend_lowmem_rx; 221 int suspend_lowmem_ctrl; 222 int linkstate; 223 int opened; 224 struct delayed_work lowmem_work; 225 226 struct usb_device *dev; 227 struct usb_interface *intf; 228 struct net_device *net; 229 wait_queue_head_t term_wait; 230 231 struct urb *rx_urb; 232 struct urb *tx_urb; 233 struct urb *irq_urb; 234 235 dma_addr_t intbufferhandle; 236 __u8 *intbuffer; 237 dma_addr_t rxbufferhandle; 238 __u8 *rx_buf; 239 240 241 struct sk_buff *tx_skb; 242 243 __u8 *firmware_buf; 244 __u8 scratch[KAWETH_SCRATCH_SIZE]; 245 __u16 packet_filter_bitmap; 246 247 struct kaweth_ethernet_configuration configuration; 248 249 struct net_device_stats stats; 250 }; 251 252 /**************************************************************** 253 * kaweth_control 254 ****************************************************************/ 255 static int kaweth_control(struct kaweth_device *kaweth, 256 unsigned int pipe, 257 __u8 request, 258 __u8 requesttype, 259 __u16 value, 260 __u16 index, 261 void *data, 262 __u16 size, 263 int timeout) 264 { 265 struct usb_ctrlrequest *dr; 266 int retval; 267 268 if(in_interrupt()) { 269 netdev_dbg(kaweth->net, "in_interrupt()\n"); 270 return -EBUSY; 271 } 272 273 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC); 274 if (!dr) 275 return -ENOMEM; 276 277 dr->bRequestType = requesttype; 278 dr->bRequest = request; 279 dr->wValue = cpu_to_le16(value); 280 dr->wIndex = cpu_to_le16(index); 281 dr->wLength = cpu_to_le16(size); 282 283 retval = kaweth_internal_control_msg(kaweth->dev, 284 pipe, 285 dr, 286 data, 287 size, 288 timeout); 289 290 kfree(dr); 291 return retval; 292 } 293 294 /**************************************************************** 295 * kaweth_read_configuration 296 ****************************************************************/ 297 static int kaweth_read_configuration(struct kaweth_device *kaweth) 298 { 299 int retval; 300 301 retval = kaweth_control(kaweth, 302 usb_rcvctrlpipe(kaweth->dev, 0), 303 KAWETH_COMMAND_GET_ETHERNET_DESC, 304 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE, 305 0, 306 0, 307 (void *)&kaweth->configuration, 308 sizeof(kaweth->configuration), 309 KAWETH_CONTROL_TIMEOUT); 310 311 return retval; 312 } 313 314 /**************************************************************** 315 * kaweth_set_urb_size 316 ****************************************************************/ 317 static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size) 318 { 319 int retval; 320 321 netdev_dbg(kaweth->net, "Setting URB size to %d\n", (unsigned)urb_size); 322 323 retval = kaweth_control(kaweth, 324 usb_sndctrlpipe(kaweth->dev, 0), 325 KAWETH_COMMAND_SET_URB_SIZE, 326 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 327 urb_size, 328 0, 329 (void *)&kaweth->scratch, 330 0, 331 KAWETH_CONTROL_TIMEOUT); 332 333 return retval; 334 } 335 336 /**************************************************************** 337 * kaweth_set_sofs_wait 338 ****************************************************************/ 339 static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait) 340 { 341 int retval; 342 343 netdev_dbg(kaweth->net, "Set SOFS wait to %d\n", (unsigned)sofs_wait); 344 345 retval = kaweth_control(kaweth, 346 usb_sndctrlpipe(kaweth->dev, 0), 347 KAWETH_COMMAND_SET_SOFS_WAIT, 348 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 349 sofs_wait, 350 0, 351 (void *)&kaweth->scratch, 352 0, 353 KAWETH_CONTROL_TIMEOUT); 354 355 return retval; 356 } 357 358 /**************************************************************** 359 * kaweth_set_receive_filter 360 ****************************************************************/ 361 static int kaweth_set_receive_filter(struct kaweth_device *kaweth, 362 __u16 receive_filter) 363 { 364 int retval; 365 366 netdev_dbg(kaweth->net, "Set receive filter to %d\n", 367 (unsigned)receive_filter); 368 369 retval = kaweth_control(kaweth, 370 usb_sndctrlpipe(kaweth->dev, 0), 371 KAWETH_COMMAND_SET_PACKET_FILTER, 372 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 373 receive_filter, 374 0, 375 (void *)&kaweth->scratch, 376 0, 377 KAWETH_CONTROL_TIMEOUT); 378 379 return retval; 380 } 381 382 /**************************************************************** 383 * kaweth_download_firmware 384 ****************************************************************/ 385 static int kaweth_download_firmware(struct kaweth_device *kaweth, 386 const char *fwname, 387 __u8 interrupt, 388 __u8 type) 389 { 390 const struct firmware *fw; 391 int data_len; 392 int ret; 393 394 ret = request_firmware(&fw, fwname, &kaweth->dev->dev); 395 if (ret) { 396 dev_err(&kaweth->intf->dev, "Firmware request failed\n"); 397 return ret; 398 } 399 400 if (fw->size > KAWETH_FIRMWARE_BUF_SIZE) { 401 dev_err(&kaweth->intf->dev, "Firmware too big: %zu\n", 402 fw->size); 403 release_firmware(fw); 404 return -ENOSPC; 405 } 406 data_len = fw->size; 407 memcpy(kaweth->firmware_buf, fw->data, fw->size); 408 409 release_firmware(fw); 410 411 kaweth->firmware_buf[2] = (data_len & 0xFF) - 7; 412 kaweth->firmware_buf[3] = data_len >> 8; 413 kaweth->firmware_buf[4] = type; 414 kaweth->firmware_buf[5] = interrupt; 415 416 netdev_dbg(kaweth->net, "High: %i, Low:%i\n", kaweth->firmware_buf[3], 417 kaweth->firmware_buf[2]); 418 419 netdev_dbg(kaweth->net, 420 "Downloading firmware at %p to kaweth device at %p\n", 421 kaweth->firmware_buf, kaweth); 422 netdev_dbg(kaweth->net, "Firmware length: %d\n", data_len); 423 424 return kaweth_control(kaweth, 425 usb_sndctrlpipe(kaweth->dev, 0), 426 KAWETH_COMMAND_SCAN, 427 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 428 0, 429 0, 430 (void *)kaweth->firmware_buf, 431 data_len, 432 KAWETH_CONTROL_TIMEOUT); 433 } 434 435 /**************************************************************** 436 * kaweth_trigger_firmware 437 ****************************************************************/ 438 static int kaweth_trigger_firmware(struct kaweth_device *kaweth, 439 __u8 interrupt) 440 { 441 kaweth->firmware_buf[0] = 0xB6; 442 kaweth->firmware_buf[1] = 0xC3; 443 kaweth->firmware_buf[2] = 0x01; 444 kaweth->firmware_buf[3] = 0x00; 445 kaweth->firmware_buf[4] = 0x06; 446 kaweth->firmware_buf[5] = interrupt; 447 kaweth->firmware_buf[6] = 0x00; 448 kaweth->firmware_buf[7] = 0x00; 449 450 return kaweth_control(kaweth, 451 usb_sndctrlpipe(kaweth->dev, 0), 452 KAWETH_COMMAND_SCAN, 453 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 454 0, 455 0, 456 (void *)kaweth->firmware_buf, 457 8, 458 KAWETH_CONTROL_TIMEOUT); 459 } 460 461 /**************************************************************** 462 * kaweth_reset 463 ****************************************************************/ 464 static int kaweth_reset(struct kaweth_device *kaweth) 465 { 466 int result; 467 468 result = usb_reset_configuration(kaweth->dev); 469 mdelay(10); 470 471 netdev_dbg(kaweth->net, "kaweth_reset() returns %d.\n", result); 472 473 return result; 474 } 475 476 static void kaweth_usb_receive(struct urb *); 477 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t); 478 479 /**************************************************************** 480 int_callback 481 *****************************************************************/ 482 483 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf) 484 { 485 int status; 486 487 status = usb_submit_urb (kaweth->irq_urb, mf); 488 if (unlikely(status == -ENOMEM)) { 489 kaweth->suspend_lowmem_ctrl = 1; 490 schedule_delayed_work(&kaweth->lowmem_work, HZ/4); 491 } else { 492 kaweth->suspend_lowmem_ctrl = 0; 493 } 494 495 if (status) 496 dev_err(&kaweth->intf->dev, 497 "can't resubmit intr, %s-%s, status %d\n", 498 kaweth->dev->bus->bus_name, 499 kaweth->dev->devpath, status); 500 } 501 502 static void int_callback(struct urb *u) 503 { 504 struct kaweth_device *kaweth = u->context; 505 int act_state; 506 int status = u->status; 507 508 switch (status) { 509 case 0: /* success */ 510 break; 511 case -ECONNRESET: /* unlink */ 512 case -ENOENT: 513 case -ESHUTDOWN: 514 return; 515 /* -EPIPE: should clear the halt */ 516 default: /* error */ 517 goto resubmit; 518 } 519 520 /* we check the link state to report changes */ 521 if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) { 522 if (act_state) 523 netif_carrier_on(kaweth->net); 524 else 525 netif_carrier_off(kaweth->net); 526 527 kaweth->linkstate = act_state; 528 } 529 resubmit: 530 kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC); 531 } 532 533 static void kaweth_resubmit_tl(struct work_struct *work) 534 { 535 struct kaweth_device *kaweth = 536 container_of(work, struct kaweth_device, lowmem_work.work); 537 538 if (IS_BLOCKED(kaweth->status)) 539 return; 540 541 if (kaweth->suspend_lowmem_rx) 542 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO); 543 544 if (kaweth->suspend_lowmem_ctrl) 545 kaweth_resubmit_int_urb(kaweth, GFP_NOIO); 546 } 547 548 549 /**************************************************************** 550 * kaweth_resubmit_rx_urb 551 ****************************************************************/ 552 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth, 553 gfp_t mem_flags) 554 { 555 int result; 556 557 usb_fill_bulk_urb(kaweth->rx_urb, 558 kaweth->dev, 559 usb_rcvbulkpipe(kaweth->dev, 1), 560 kaweth->rx_buf, 561 KAWETH_BUF_SIZE, 562 kaweth_usb_receive, 563 kaweth); 564 kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 565 kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle; 566 567 if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) { 568 if (result == -ENOMEM) { 569 kaweth->suspend_lowmem_rx = 1; 570 schedule_delayed_work(&kaweth->lowmem_work, HZ/4); 571 } 572 dev_err(&kaweth->intf->dev, "resubmitting rx_urb %d failed\n", 573 result); 574 } else { 575 kaweth->suspend_lowmem_rx = 0; 576 } 577 578 return result; 579 } 580 581 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth); 582 583 /**************************************************************** 584 * kaweth_usb_receive 585 ****************************************************************/ 586 static void kaweth_usb_receive(struct urb *urb) 587 { 588 struct device *dev = &urb->dev->dev; 589 struct kaweth_device *kaweth = urb->context; 590 struct net_device *net = kaweth->net; 591 int status = urb->status; 592 593 int count = urb->actual_length; 594 int count2 = urb->transfer_buffer_length; 595 596 __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf); 597 598 struct sk_buff *skb; 599 600 if (unlikely(status == -EPIPE)) { 601 kaweth->stats.rx_errors++; 602 kaweth->end = 1; 603 wake_up(&kaweth->term_wait); 604 dev_dbg(dev, "Status was -EPIPE.\n"); 605 return; 606 } 607 if (unlikely(status == -ECONNRESET || status == -ESHUTDOWN)) { 608 /* we are killed - set a flag and wake the disconnect handler */ 609 kaweth->end = 1; 610 wake_up(&kaweth->term_wait); 611 dev_dbg(dev, "Status was -ECONNRESET or -ESHUTDOWN.\n"); 612 return; 613 } 614 if (unlikely(status == -EPROTO || status == -ETIME || 615 status == -EILSEQ)) { 616 kaweth->stats.rx_errors++; 617 dev_dbg(dev, "Status was -EPROTO, -ETIME, or -EILSEQ.\n"); 618 return; 619 } 620 if (unlikely(status == -EOVERFLOW)) { 621 kaweth->stats.rx_errors++; 622 dev_dbg(dev, "Status was -EOVERFLOW.\n"); 623 } 624 spin_lock(&kaweth->device_lock); 625 if (IS_BLOCKED(kaweth->status)) { 626 spin_unlock(&kaweth->device_lock); 627 return; 628 } 629 spin_unlock(&kaweth->device_lock); 630 631 if(status && status != -EREMOTEIO && count != 1) { 632 dev_err(&kaweth->intf->dev, 633 "%s RX status: %d count: %d packet_len: %d\n", 634 net->name, status, count, (int)pkt_len); 635 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 636 return; 637 } 638 639 if(kaweth->net && (count > 2)) { 640 if(pkt_len > (count - 2)) { 641 dev_err(&kaweth->intf->dev, 642 "Packet length too long for USB frame (pkt_len: %x, count: %x)\n", 643 pkt_len, count); 644 dev_err(&kaweth->intf->dev, "Packet len & 2047: %x\n", 645 pkt_len & 2047); 646 dev_err(&kaweth->intf->dev, "Count 2: %x\n", count2); 647 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 648 return; 649 } 650 651 if(!(skb = dev_alloc_skb(pkt_len+2))) { 652 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 653 return; 654 } 655 656 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */ 657 658 skb_copy_to_linear_data(skb, kaweth->rx_buf + 2, pkt_len); 659 660 skb_put(skb, pkt_len); 661 662 skb->protocol = eth_type_trans(skb, net); 663 664 netif_rx(skb); 665 666 kaweth->stats.rx_packets++; 667 kaweth->stats.rx_bytes += pkt_len; 668 } 669 670 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 671 } 672 673 /**************************************************************** 674 * kaweth_open 675 ****************************************************************/ 676 static int kaweth_open(struct net_device *net) 677 { 678 struct kaweth_device *kaweth = netdev_priv(net); 679 int res; 680 681 res = usb_autopm_get_interface(kaweth->intf); 682 if (res) { 683 dev_err(&kaweth->intf->dev, "Interface cannot be resumed.\n"); 684 return -EIO; 685 } 686 res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL); 687 if (res) 688 goto err_out; 689 690 usb_fill_int_urb( 691 kaweth->irq_urb, 692 kaweth->dev, 693 usb_rcvintpipe(kaweth->dev, 3), 694 kaweth->intbuffer, 695 INTBUFFERSIZE, 696 int_callback, 697 kaweth, 698 250); /* overriding the descriptor */ 699 kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle; 700 kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 701 702 res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL); 703 if (res) { 704 usb_kill_urb(kaweth->rx_urb); 705 goto err_out; 706 } 707 kaweth->opened = 1; 708 709 netif_start_queue(net); 710 711 kaweth_async_set_rx_mode(kaweth); 712 return 0; 713 714 err_out: 715 usb_autopm_put_interface(kaweth->intf); 716 return -EIO; 717 } 718 719 /**************************************************************** 720 * kaweth_kill_urbs 721 ****************************************************************/ 722 static void kaweth_kill_urbs(struct kaweth_device *kaweth) 723 { 724 usb_kill_urb(kaweth->irq_urb); 725 usb_kill_urb(kaweth->rx_urb); 726 usb_kill_urb(kaweth->tx_urb); 727 728 cancel_delayed_work_sync(&kaweth->lowmem_work); 729 730 /* a scheduled work may have resubmitted, 731 we hit them again */ 732 usb_kill_urb(kaweth->irq_urb); 733 usb_kill_urb(kaweth->rx_urb); 734 } 735 736 /**************************************************************** 737 * kaweth_close 738 ****************************************************************/ 739 static int kaweth_close(struct net_device *net) 740 { 741 struct kaweth_device *kaweth = netdev_priv(net); 742 743 netif_stop_queue(net); 744 kaweth->opened = 0; 745 746 kaweth->status |= KAWETH_STATUS_CLOSING; 747 748 kaweth_kill_urbs(kaweth); 749 750 kaweth->status &= ~KAWETH_STATUS_CLOSING; 751 752 usb_autopm_put_interface(kaweth->intf); 753 754 return 0; 755 } 756 757 static u32 kaweth_get_link(struct net_device *dev) 758 { 759 struct kaweth_device *kaweth = netdev_priv(dev); 760 761 return kaweth->linkstate; 762 } 763 764 static const struct ethtool_ops ops = { 765 .get_link = kaweth_get_link 766 }; 767 768 /**************************************************************** 769 * kaweth_usb_transmit_complete 770 ****************************************************************/ 771 static void kaweth_usb_transmit_complete(struct urb *urb) 772 { 773 struct kaweth_device *kaweth = urb->context; 774 struct sk_buff *skb = kaweth->tx_skb; 775 int status = urb->status; 776 777 if (unlikely(status != 0)) 778 if (status != -ENOENT) 779 dev_dbg(&urb->dev->dev, "%s: TX status %d.\n", 780 kaweth->net->name, status); 781 782 netif_wake_queue(kaweth->net); 783 dev_kfree_skb_irq(skb); 784 } 785 786 /**************************************************************** 787 * kaweth_start_xmit 788 ****************************************************************/ 789 static netdev_tx_t kaweth_start_xmit(struct sk_buff *skb, 790 struct net_device *net) 791 { 792 struct kaweth_device *kaweth = netdev_priv(net); 793 __le16 *private_header; 794 795 int res; 796 797 spin_lock_irq(&kaweth->device_lock); 798 799 kaweth_async_set_rx_mode(kaweth); 800 netif_stop_queue(net); 801 if (IS_BLOCKED(kaweth->status)) { 802 goto skip; 803 } 804 805 /* We now decide whether we can put our special header into the sk_buff */ 806 if (skb_cow_head(skb, 2)) { 807 kaweth->stats.tx_errors++; 808 netif_start_queue(net); 809 spin_unlock_irq(&kaweth->device_lock); 810 dev_kfree_skb_any(skb); 811 return NETDEV_TX_OK; 812 } 813 814 private_header = (__le16 *)__skb_push(skb, 2); 815 *private_header = cpu_to_le16(skb->len-2); 816 kaweth->tx_skb = skb; 817 818 usb_fill_bulk_urb(kaweth->tx_urb, 819 kaweth->dev, 820 usb_sndbulkpipe(kaweth->dev, 2), 821 private_header, 822 skb->len, 823 kaweth_usb_transmit_complete, 824 kaweth); 825 kaweth->end = 0; 826 827 if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC))) 828 { 829 dev_warn(&net->dev, "kaweth failed tx_urb %d\n", res); 830 skip: 831 kaweth->stats.tx_errors++; 832 833 netif_start_queue(net); 834 dev_kfree_skb_irq(skb); 835 } 836 else 837 { 838 kaweth->stats.tx_packets++; 839 kaweth->stats.tx_bytes += skb->len; 840 } 841 842 spin_unlock_irq(&kaweth->device_lock); 843 844 return NETDEV_TX_OK; 845 } 846 847 /**************************************************************** 848 * kaweth_set_rx_mode 849 ****************************************************************/ 850 static void kaweth_set_rx_mode(struct net_device *net) 851 { 852 struct kaweth_device *kaweth = netdev_priv(net); 853 854 __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED | 855 KAWETH_PACKET_FILTER_BROADCAST | 856 KAWETH_PACKET_FILTER_MULTICAST; 857 858 netdev_dbg(net, "Setting Rx mode to %d\n", packet_filter_bitmap); 859 860 netif_stop_queue(net); 861 862 if (net->flags & IFF_PROMISC) { 863 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS; 864 } 865 else if (!netdev_mc_empty(net) || (net->flags & IFF_ALLMULTI)) { 866 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST; 867 } 868 869 kaweth->packet_filter_bitmap = packet_filter_bitmap; 870 netif_wake_queue(net); 871 } 872 873 /**************************************************************** 874 * kaweth_async_set_rx_mode 875 ****************************************************************/ 876 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth) 877 { 878 int result; 879 __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap; 880 881 kaweth->packet_filter_bitmap = 0; 882 if (packet_filter_bitmap == 0) 883 return; 884 885 if (in_interrupt()) 886 return; 887 888 result = kaweth_control(kaweth, 889 usb_sndctrlpipe(kaweth->dev, 0), 890 KAWETH_COMMAND_SET_PACKET_FILTER, 891 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 892 packet_filter_bitmap, 893 0, 894 (void *)&kaweth->scratch, 895 0, 896 KAWETH_CONTROL_TIMEOUT); 897 898 if(result < 0) { 899 dev_err(&kaweth->intf->dev, "Failed to set Rx mode: %d\n", 900 result); 901 } 902 else { 903 netdev_dbg(kaweth->net, "Set Rx mode to %d\n", 904 packet_filter_bitmap); 905 } 906 } 907 908 /**************************************************************** 909 * kaweth_netdev_stats 910 ****************************************************************/ 911 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev) 912 { 913 struct kaweth_device *kaweth = netdev_priv(dev); 914 return &kaweth->stats; 915 } 916 917 /**************************************************************** 918 * kaweth_tx_timeout 919 ****************************************************************/ 920 static void kaweth_tx_timeout(struct net_device *net) 921 { 922 struct kaweth_device *kaweth = netdev_priv(net); 923 924 dev_warn(&net->dev, "%s: Tx timed out. Resetting.\n", net->name); 925 kaweth->stats.tx_errors++; 926 netif_trans_update(net); 927 928 usb_unlink_urb(kaweth->tx_urb); 929 } 930 931 /**************************************************************** 932 * kaweth_suspend 933 ****************************************************************/ 934 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message) 935 { 936 struct kaweth_device *kaweth = usb_get_intfdata(intf); 937 unsigned long flags; 938 939 spin_lock_irqsave(&kaweth->device_lock, flags); 940 kaweth->status |= KAWETH_STATUS_SUSPENDING; 941 spin_unlock_irqrestore(&kaweth->device_lock, flags); 942 943 kaweth_kill_urbs(kaweth); 944 return 0; 945 } 946 947 /**************************************************************** 948 * kaweth_resume 949 ****************************************************************/ 950 static int kaweth_resume(struct usb_interface *intf) 951 { 952 struct kaweth_device *kaweth = usb_get_intfdata(intf); 953 unsigned long flags; 954 955 spin_lock_irqsave(&kaweth->device_lock, flags); 956 kaweth->status &= ~KAWETH_STATUS_SUSPENDING; 957 spin_unlock_irqrestore(&kaweth->device_lock, flags); 958 959 if (!kaweth->opened) 960 return 0; 961 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO); 962 kaweth_resubmit_int_urb(kaweth, GFP_NOIO); 963 964 return 0; 965 } 966 967 /**************************************************************** 968 * kaweth_probe 969 ****************************************************************/ 970 971 972 static const struct net_device_ops kaweth_netdev_ops = { 973 .ndo_open = kaweth_open, 974 .ndo_stop = kaweth_close, 975 .ndo_start_xmit = kaweth_start_xmit, 976 .ndo_tx_timeout = kaweth_tx_timeout, 977 .ndo_set_rx_mode = kaweth_set_rx_mode, 978 .ndo_get_stats = kaweth_netdev_stats, 979 .ndo_set_mac_address = eth_mac_addr, 980 .ndo_validate_addr = eth_validate_addr, 981 }; 982 983 static int kaweth_probe( 984 struct usb_interface *intf, 985 const struct usb_device_id *id /* from id_table */ 986 ) 987 { 988 struct device *dev = &intf->dev; 989 struct usb_device *udev = interface_to_usbdev(intf); 990 struct kaweth_device *kaweth; 991 struct net_device *netdev; 992 const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; 993 int result = 0; 994 int rv = -EIO; 995 996 dev_dbg(dev, 997 "Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x\n", 998 udev->devnum, le16_to_cpu(udev->descriptor.idVendor), 999 le16_to_cpu(udev->descriptor.idProduct), 1000 le16_to_cpu(udev->descriptor.bcdDevice)); 1001 1002 dev_dbg(dev, "Device at %p\n", udev); 1003 1004 dev_dbg(dev, "Descriptor length: %x type: %x\n", 1005 (int)udev->descriptor.bLength, 1006 (int)udev->descriptor.bDescriptorType); 1007 1008 netdev = alloc_etherdev(sizeof(*kaweth)); 1009 if (!netdev) 1010 return -ENOMEM; 1011 1012 kaweth = netdev_priv(netdev); 1013 kaweth->dev = udev; 1014 kaweth->net = netdev; 1015 kaweth->intf = intf; 1016 1017 spin_lock_init(&kaweth->device_lock); 1018 init_waitqueue_head(&kaweth->term_wait); 1019 1020 dev_dbg(dev, "Resetting.\n"); 1021 1022 kaweth_reset(kaweth); 1023 1024 /* 1025 * If high byte of bcdDevice is nonzero, firmware is already 1026 * downloaded. Don't try to do it again, or we'll hang the device. 1027 */ 1028 1029 if (le16_to_cpu(udev->descriptor.bcdDevice) >> 8) { 1030 dev_info(dev, "Firmware present in device.\n"); 1031 } else { 1032 /* Download the firmware */ 1033 dev_info(dev, "Downloading firmware...\n"); 1034 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL); 1035 if (!kaweth->firmware_buf) { 1036 rv = -ENOMEM; 1037 goto err_free_netdev; 1038 } 1039 if ((result = kaweth_download_firmware(kaweth, 1040 "kaweth/new_code.bin", 1041 100, 1042 2)) < 0) { 1043 dev_err(dev, "Error downloading firmware (%d)\n", 1044 result); 1045 goto err_fw; 1046 } 1047 1048 if ((result = kaweth_download_firmware(kaweth, 1049 "kaweth/new_code_fix.bin", 1050 100, 1051 3)) < 0) { 1052 dev_err(dev, "Error downloading firmware fix (%d)\n", 1053 result); 1054 goto err_fw; 1055 } 1056 1057 if ((result = kaweth_download_firmware(kaweth, 1058 "kaweth/trigger_code.bin", 1059 126, 1060 2)) < 0) { 1061 dev_err(dev, "Error downloading trigger code (%d)\n", 1062 result); 1063 goto err_fw; 1064 1065 } 1066 1067 if ((result = kaweth_download_firmware(kaweth, 1068 "kaweth/trigger_code_fix.bin", 1069 126, 1070 3)) < 0) { 1071 dev_err(dev, "Error downloading trigger code fix (%d)\n", result); 1072 goto err_fw; 1073 } 1074 1075 1076 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) { 1077 dev_err(dev, "Error triggering firmware (%d)\n", result); 1078 goto err_fw; 1079 } 1080 1081 /* Device will now disappear for a moment... */ 1082 dev_info(dev, "Firmware loaded. I'll be back...\n"); 1083 err_fw: 1084 free_page((unsigned long)kaweth->firmware_buf); 1085 free_netdev(netdev); 1086 return -EIO; 1087 } 1088 1089 result = kaweth_read_configuration(kaweth); 1090 1091 if(result < 0) { 1092 dev_err(dev, "Error reading configuration (%d), no net device created\n", result); 1093 goto err_free_netdev; 1094 } 1095 1096 dev_info(dev, "Statistics collection: %x\n", kaweth->configuration.statistics_mask); 1097 dev_info(dev, "Multicast filter limit: %x\n", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1)); 1098 dev_info(dev, "MTU: %d\n", le16_to_cpu(kaweth->configuration.segment_size)); 1099 dev_info(dev, "Read MAC address %pM\n", kaweth->configuration.hw_addr); 1100 1101 if(!memcmp(&kaweth->configuration.hw_addr, 1102 &bcast_addr, 1103 sizeof(bcast_addr))) { 1104 dev_err(dev, "Firmware not functioning properly, no net device created\n"); 1105 goto err_free_netdev; 1106 } 1107 1108 if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) { 1109 dev_dbg(dev, "Error setting URB size\n"); 1110 goto err_free_netdev; 1111 } 1112 1113 if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) { 1114 dev_err(dev, "Error setting SOFS wait\n"); 1115 goto err_free_netdev; 1116 } 1117 1118 result = kaweth_set_receive_filter(kaweth, 1119 KAWETH_PACKET_FILTER_DIRECTED | 1120 KAWETH_PACKET_FILTER_BROADCAST | 1121 KAWETH_PACKET_FILTER_MULTICAST); 1122 1123 if(result < 0) { 1124 dev_err(dev, "Error setting receive filter\n"); 1125 goto err_free_netdev; 1126 } 1127 1128 dev_dbg(dev, "Initializing net device.\n"); 1129 1130 kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 1131 if (!kaweth->tx_urb) 1132 goto err_free_netdev; 1133 kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL); 1134 if (!kaweth->rx_urb) 1135 goto err_only_tx; 1136 kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL); 1137 if (!kaweth->irq_urb) 1138 goto err_tx_and_rx; 1139 1140 kaweth->intbuffer = usb_alloc_coherent( kaweth->dev, 1141 INTBUFFERSIZE, 1142 GFP_KERNEL, 1143 &kaweth->intbufferhandle); 1144 if (!kaweth->intbuffer) 1145 goto err_tx_and_rx_and_irq; 1146 kaweth->rx_buf = usb_alloc_coherent( kaweth->dev, 1147 KAWETH_BUF_SIZE, 1148 GFP_KERNEL, 1149 &kaweth->rxbufferhandle); 1150 if (!kaweth->rx_buf) 1151 goto err_all_but_rxbuf; 1152 1153 memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr)); 1154 memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr, 1155 sizeof(kaweth->configuration.hw_addr)); 1156 1157 netdev->netdev_ops = &kaweth_netdev_ops; 1158 netdev->watchdog_timeo = KAWETH_TX_TIMEOUT; 1159 netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size); 1160 netdev->ethtool_ops = &ops; 1161 1162 /* kaweth is zeroed as part of alloc_netdev */ 1163 INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl); 1164 usb_set_intfdata(intf, kaweth); 1165 1166 SET_NETDEV_DEV(netdev, dev); 1167 if (register_netdev(netdev) != 0) { 1168 dev_err(dev, "Error registering netdev.\n"); 1169 goto err_intfdata; 1170 } 1171 1172 dev_info(dev, "kaweth interface created at %s\n", 1173 kaweth->net->name); 1174 1175 return 0; 1176 1177 err_intfdata: 1178 usb_set_intfdata(intf, NULL); 1179 usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle); 1180 err_all_but_rxbuf: 1181 usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle); 1182 err_tx_and_rx_and_irq: 1183 usb_free_urb(kaweth->irq_urb); 1184 err_tx_and_rx: 1185 usb_free_urb(kaweth->rx_urb); 1186 err_only_tx: 1187 usb_free_urb(kaweth->tx_urb); 1188 err_free_netdev: 1189 free_netdev(netdev); 1190 1191 return rv; 1192 } 1193 1194 /**************************************************************** 1195 * kaweth_disconnect 1196 ****************************************************************/ 1197 static void kaweth_disconnect(struct usb_interface *intf) 1198 { 1199 struct kaweth_device *kaweth = usb_get_intfdata(intf); 1200 struct net_device *netdev; 1201 1202 usb_set_intfdata(intf, NULL); 1203 if (!kaweth) { 1204 dev_warn(&intf->dev, "unregistering non-existent device\n"); 1205 return; 1206 } 1207 netdev = kaweth->net; 1208 1209 netdev_dbg(kaweth->net, "Unregistering net device\n"); 1210 unregister_netdev(netdev); 1211 1212 usb_free_urb(kaweth->rx_urb); 1213 usb_free_urb(kaweth->tx_urb); 1214 usb_free_urb(kaweth->irq_urb); 1215 1216 usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle); 1217 usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle); 1218 1219 free_netdev(netdev); 1220 } 1221 1222 1223 // FIXME this completion stuff is a modified clone of 1224 // an OLD version of some stuff in usb.c ... 1225 struct usb_api_data { 1226 wait_queue_head_t wqh; 1227 int done; 1228 }; 1229 1230 /*-------------------------------------------------------------------* 1231 * completion handler for compatibility wrappers (sync control/bulk) * 1232 *-------------------------------------------------------------------*/ 1233 static void usb_api_blocking_completion(struct urb *urb) 1234 { 1235 struct usb_api_data *awd = (struct usb_api_data *)urb->context; 1236 1237 awd->done=1; 1238 wake_up(&awd->wqh); 1239 } 1240 1241 /*-------------------------------------------------------------------* 1242 * COMPATIBILITY STUFF * 1243 *-------------------------------------------------------------------*/ 1244 1245 // Starts urb and waits for completion or timeout 1246 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length) 1247 { 1248 struct usb_api_data awd; 1249 int status; 1250 1251 init_waitqueue_head(&awd.wqh); 1252 awd.done = 0; 1253 1254 urb->context = &awd; 1255 status = usb_submit_urb(urb, GFP_ATOMIC); 1256 if (status) { 1257 // something went wrong 1258 usb_free_urb(urb); 1259 return status; 1260 } 1261 1262 if (!wait_event_timeout(awd.wqh, awd.done, timeout)) { 1263 // timeout 1264 dev_warn(&urb->dev->dev, "usb_control/bulk_msg: timeout\n"); 1265 usb_kill_urb(urb); // remove urb safely 1266 status = -ETIMEDOUT; 1267 } 1268 else { 1269 status = urb->status; 1270 } 1271 1272 if (actual_length) { 1273 *actual_length = urb->actual_length; 1274 } 1275 1276 usb_free_urb(urb); 1277 return status; 1278 } 1279 1280 /*-------------------------------------------------------------------*/ 1281 // returns status (negative) or length (positive) 1282 static int kaweth_internal_control_msg(struct usb_device *usb_dev, 1283 unsigned int pipe, 1284 struct usb_ctrlrequest *cmd, void *data, 1285 int len, int timeout) 1286 { 1287 struct urb *urb; 1288 int retv; 1289 int length = 0; /* shut up GCC */ 1290 1291 urb = usb_alloc_urb(0, GFP_ATOMIC); 1292 if (!urb) 1293 return -ENOMEM; 1294 1295 usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data, 1296 len, usb_api_blocking_completion, NULL); 1297 1298 retv = usb_start_wait_urb(urb, timeout, &length); 1299 if (retv < 0) { 1300 return retv; 1301 } 1302 else { 1303 return length; 1304 } 1305 } 1306 1307 module_usb_driver(kaweth_driver); 1308