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, write to the Free Software Foundation, 29 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 30 * 31 ****************************************************************/ 32 33 /* TODO: 34 * Develop test procedures for USB net interfaces 35 * Run test procedures 36 * Fix bugs from previous two steps 37 * Snoop other OSs for any tricks we're not doing 38 * Reduce arbitrary timeouts 39 * Smart multicast support 40 * Temporary MAC change support 41 * Tunable SOFs parameter - ioctl()? 42 * Ethernet stats collection 43 * Code formatting improvements 44 */ 45 46 #include <linux/module.h> 47 #include <linux/slab.h> 48 #include <linux/string.h> 49 #include <linux/init.h> 50 #include <linux/delay.h> 51 #include <linux/netdevice.h> 52 #include <linux/etherdevice.h> 53 #include <linux/usb.h> 54 #include <linux/types.h> 55 #include <linux/ethtool.h> 56 #include <linux/dma-mapping.h> 57 #include <linux/wait.h> 58 #include <linux/firmware.h> 59 #include <asm/uaccess.h> 60 #include <asm/byteorder.h> 61 62 #undef DEBUG 63 64 #define KAWETH_MTU 1514 65 #define KAWETH_BUF_SIZE 1664 66 #define KAWETH_TX_TIMEOUT (5 * HZ) 67 #define KAWETH_SCRATCH_SIZE 32 68 #define KAWETH_FIRMWARE_BUF_SIZE 4096 69 #define KAWETH_CONTROL_TIMEOUT (30000) 70 71 #define KAWETH_STATUS_BROKEN 0x0000001 72 #define KAWETH_STATUS_CLOSING 0x0000002 73 #define KAWETH_STATUS_SUSPENDING 0x0000004 74 75 #define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING) 76 77 #define KAWETH_PACKET_FILTER_PROMISCUOUS 0x01 78 #define KAWETH_PACKET_FILTER_ALL_MULTICAST 0x02 79 #define KAWETH_PACKET_FILTER_DIRECTED 0x04 80 #define KAWETH_PACKET_FILTER_BROADCAST 0x08 81 #define KAWETH_PACKET_FILTER_MULTICAST 0x10 82 83 /* Table 7 */ 84 #define KAWETH_COMMAND_GET_ETHERNET_DESC 0x00 85 #define KAWETH_COMMAND_MULTICAST_FILTERS 0x01 86 #define KAWETH_COMMAND_SET_PACKET_FILTER 0x02 87 #define KAWETH_COMMAND_STATISTICS 0x03 88 #define KAWETH_COMMAND_SET_TEMP_MAC 0x06 89 #define KAWETH_COMMAND_GET_TEMP_MAC 0x07 90 #define KAWETH_COMMAND_SET_URB_SIZE 0x08 91 #define KAWETH_COMMAND_SET_SOFS_WAIT 0x09 92 #define KAWETH_COMMAND_SCAN 0xFF 93 94 #define KAWETH_SOFS_TO_WAIT 0x05 95 96 #define INTBUFFERSIZE 4 97 98 #define STATE_OFFSET 0 99 #define STATE_MASK 0x40 100 #define STATE_SHIFT 5 101 102 #define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED) 103 104 105 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>"); 106 MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver"); 107 MODULE_LICENSE("GPL"); 108 MODULE_FIRMWARE("kaweth/new_code.bin"); 109 MODULE_FIRMWARE("kaweth/new_code_fix.bin"); 110 MODULE_FIRMWARE("kaweth/trigger_code.bin"); 111 MODULE_FIRMWARE("kaweth/trigger_code_fix.bin"); 112 113 static const char driver_name[] = "kaweth"; 114 115 static int kaweth_probe( 116 struct usb_interface *intf, 117 const struct usb_device_id *id /* from id_table */ 118 ); 119 static void kaweth_disconnect(struct usb_interface *intf); 120 static int kaweth_internal_control_msg(struct usb_device *usb_dev, 121 unsigned int pipe, 122 struct usb_ctrlrequest *cmd, void *data, 123 int len, int timeout); 124 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message); 125 static int kaweth_resume(struct usb_interface *intf); 126 127 /**************************************************************** 128 * usb_device_id 129 ****************************************************************/ 130 static struct usb_device_id usb_klsi_table[] = { 131 { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */ 132 { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */ 133 { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */ 134 { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */ 135 { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */ 136 { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */ 137 { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */ 138 { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */ 139 { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */ 140 { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */ 141 { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */ 142 { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */ 143 { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */ 144 { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */ 145 { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */ 146 { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */ 147 { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */ 148 { USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */ 149 { USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */ 150 { USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */ 151 { USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */ 152 { USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */ 153 { USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */ 154 { USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */ 155 { USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */ 156 { USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */ 157 { USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */ 158 { USB_DEVICE(0x1485, 0x0001) }, /* Silicom U2E */ 159 { USB_DEVICE(0x1485, 0x0002) }, /* Psion Dacom Gold Port Ethernet */ 160 { USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */ 161 { USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */ 162 { USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */ 163 { USB_DEVICE(0x1668, 0x0323) }, /* Actiontec USB Ethernet */ 164 { USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */ 165 {} /* Null terminator */ 166 }; 167 168 MODULE_DEVICE_TABLE (usb, usb_klsi_table); 169 170 /**************************************************************** 171 * kaweth_driver 172 ****************************************************************/ 173 static struct usb_driver kaweth_driver = { 174 .name = driver_name, 175 .probe = kaweth_probe, 176 .disconnect = kaweth_disconnect, 177 .suspend = kaweth_suspend, 178 .resume = kaweth_resume, 179 .id_table = usb_klsi_table, 180 .supports_autosuspend = 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 } __attribute__ ((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 dbg("kaweth_control()"); 269 270 if(in_interrupt()) { 271 dbg("in_interrupt()"); 272 return -EBUSY; 273 } 274 275 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC); 276 277 if (!dr) { 278 dbg("kmalloc() failed"); 279 return -ENOMEM; 280 } 281 282 dr->bRequestType = requesttype; 283 dr->bRequest = request; 284 dr->wValue = cpu_to_le16(value); 285 dr->wIndex = cpu_to_le16(index); 286 dr->wLength = cpu_to_le16(size); 287 288 retval = kaweth_internal_control_msg(kaweth->dev, 289 pipe, 290 dr, 291 data, 292 size, 293 timeout); 294 295 kfree(dr); 296 return retval; 297 } 298 299 /**************************************************************** 300 * kaweth_read_configuration 301 ****************************************************************/ 302 static int kaweth_read_configuration(struct kaweth_device *kaweth) 303 { 304 int retval; 305 306 dbg("Reading kaweth configuration"); 307 308 retval = kaweth_control(kaweth, 309 usb_rcvctrlpipe(kaweth->dev, 0), 310 KAWETH_COMMAND_GET_ETHERNET_DESC, 311 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE, 312 0, 313 0, 314 (void *)&kaweth->configuration, 315 sizeof(kaweth->configuration), 316 KAWETH_CONTROL_TIMEOUT); 317 318 return retval; 319 } 320 321 /**************************************************************** 322 * kaweth_set_urb_size 323 ****************************************************************/ 324 static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size) 325 { 326 int retval; 327 328 dbg("Setting URB size to %d", (unsigned)urb_size); 329 330 retval = kaweth_control(kaweth, 331 usb_sndctrlpipe(kaweth->dev, 0), 332 KAWETH_COMMAND_SET_URB_SIZE, 333 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 334 urb_size, 335 0, 336 (void *)&kaweth->scratch, 337 0, 338 KAWETH_CONTROL_TIMEOUT); 339 340 return retval; 341 } 342 343 /**************************************************************** 344 * kaweth_set_sofs_wait 345 ****************************************************************/ 346 static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait) 347 { 348 int retval; 349 350 dbg("Set SOFS wait to %d", (unsigned)sofs_wait); 351 352 retval = kaweth_control(kaweth, 353 usb_sndctrlpipe(kaweth->dev, 0), 354 KAWETH_COMMAND_SET_SOFS_WAIT, 355 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 356 sofs_wait, 357 0, 358 (void *)&kaweth->scratch, 359 0, 360 KAWETH_CONTROL_TIMEOUT); 361 362 return retval; 363 } 364 365 /**************************************************************** 366 * kaweth_set_receive_filter 367 ****************************************************************/ 368 static int kaweth_set_receive_filter(struct kaweth_device *kaweth, 369 __u16 receive_filter) 370 { 371 int retval; 372 373 dbg("Set receive filter to %d", (unsigned)receive_filter); 374 375 retval = kaweth_control(kaweth, 376 usb_sndctrlpipe(kaweth->dev, 0), 377 KAWETH_COMMAND_SET_PACKET_FILTER, 378 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 379 receive_filter, 380 0, 381 (void *)&kaweth->scratch, 382 0, 383 KAWETH_CONTROL_TIMEOUT); 384 385 return retval; 386 } 387 388 /**************************************************************** 389 * kaweth_download_firmware 390 ****************************************************************/ 391 static int kaweth_download_firmware(struct kaweth_device *kaweth, 392 const char *fwname, 393 __u8 interrupt, 394 __u8 type) 395 { 396 const struct firmware *fw; 397 int data_len; 398 int ret; 399 400 ret = request_firmware(&fw, fwname, &kaweth->dev->dev); 401 if (ret) { 402 err("Firmware request failed\n"); 403 return ret; 404 } 405 406 if (fw->size > KAWETH_FIRMWARE_BUF_SIZE) { 407 err("Firmware too big: %zu", fw->size); 408 return -ENOSPC; 409 } 410 data_len = fw->size; 411 memcpy(kaweth->firmware_buf, fw->data, fw->size); 412 413 release_firmware(fw); 414 415 kaweth->firmware_buf[2] = (data_len & 0xFF) - 7; 416 kaweth->firmware_buf[3] = data_len >> 8; 417 kaweth->firmware_buf[4] = type; 418 kaweth->firmware_buf[5] = interrupt; 419 420 dbg("High: %i, Low:%i", kaweth->firmware_buf[3], 421 kaweth->firmware_buf[2]); 422 423 dbg("Downloading firmware at %p to kaweth device at %p", 424 fw->data, kaweth); 425 dbg("Firmware length: %d", data_len); 426 427 return kaweth_control(kaweth, 428 usb_sndctrlpipe(kaweth->dev, 0), 429 KAWETH_COMMAND_SCAN, 430 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 431 0, 432 0, 433 (void *)kaweth->firmware_buf, 434 data_len, 435 KAWETH_CONTROL_TIMEOUT); 436 } 437 438 /**************************************************************** 439 * kaweth_trigger_firmware 440 ****************************************************************/ 441 static int kaweth_trigger_firmware(struct kaweth_device *kaweth, 442 __u8 interrupt) 443 { 444 kaweth->firmware_buf[0] = 0xB6; 445 kaweth->firmware_buf[1] = 0xC3; 446 kaweth->firmware_buf[2] = 0x01; 447 kaweth->firmware_buf[3] = 0x00; 448 kaweth->firmware_buf[4] = 0x06; 449 kaweth->firmware_buf[5] = interrupt; 450 kaweth->firmware_buf[6] = 0x00; 451 kaweth->firmware_buf[7] = 0x00; 452 453 dbg("Triggering firmware"); 454 455 return kaweth_control(kaweth, 456 usb_sndctrlpipe(kaweth->dev, 0), 457 KAWETH_COMMAND_SCAN, 458 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 459 0, 460 0, 461 (void *)kaweth->firmware_buf, 462 8, 463 KAWETH_CONTROL_TIMEOUT); 464 } 465 466 /**************************************************************** 467 * kaweth_reset 468 ****************************************************************/ 469 static int kaweth_reset(struct kaweth_device *kaweth) 470 { 471 int result; 472 473 dbg("kaweth_reset(%p)", kaweth); 474 result = usb_reset_configuration(kaweth->dev); 475 mdelay(10); 476 477 dbg("kaweth_reset() returns %d.",result); 478 479 return result; 480 } 481 482 static void kaweth_usb_receive(struct urb *); 483 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t); 484 485 /**************************************************************** 486 int_callback 487 *****************************************************************/ 488 489 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf) 490 { 491 int status; 492 493 status = usb_submit_urb (kaweth->irq_urb, mf); 494 if (unlikely(status == -ENOMEM)) { 495 kaweth->suspend_lowmem_ctrl = 1; 496 schedule_delayed_work(&kaweth->lowmem_work, HZ/4); 497 } else { 498 kaweth->suspend_lowmem_ctrl = 0; 499 } 500 501 if (status) 502 err ("can't resubmit intr, %s-%s, status %d", 503 kaweth->dev->bus->bus_name, 504 kaweth->dev->devpath, status); 505 } 506 507 static void int_callback(struct urb *u) 508 { 509 struct kaweth_device *kaweth = u->context; 510 int act_state; 511 int status = u->status; 512 513 switch (status) { 514 case 0: /* success */ 515 break; 516 case -ECONNRESET: /* unlink */ 517 case -ENOENT: 518 case -ESHUTDOWN: 519 return; 520 /* -EPIPE: should clear the halt */ 521 default: /* error */ 522 goto resubmit; 523 } 524 525 /* we check the link state to report changes */ 526 if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) { 527 if (act_state) 528 netif_carrier_on(kaweth->net); 529 else 530 netif_carrier_off(kaweth->net); 531 532 kaweth->linkstate = act_state; 533 } 534 resubmit: 535 kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC); 536 } 537 538 static void kaweth_resubmit_tl(struct work_struct *work) 539 { 540 struct kaweth_device *kaweth = 541 container_of(work, struct kaweth_device, lowmem_work.work); 542 543 if (IS_BLOCKED(kaweth->status)) 544 return; 545 546 if (kaweth->suspend_lowmem_rx) 547 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO); 548 549 if (kaweth->suspend_lowmem_ctrl) 550 kaweth_resubmit_int_urb(kaweth, GFP_NOIO); 551 } 552 553 554 /**************************************************************** 555 * kaweth_resubmit_rx_urb 556 ****************************************************************/ 557 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth, 558 gfp_t mem_flags) 559 { 560 int result; 561 562 usb_fill_bulk_urb(kaweth->rx_urb, 563 kaweth->dev, 564 usb_rcvbulkpipe(kaweth->dev, 1), 565 kaweth->rx_buf, 566 KAWETH_BUF_SIZE, 567 kaweth_usb_receive, 568 kaweth); 569 kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 570 kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle; 571 572 if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) { 573 if (result == -ENOMEM) { 574 kaweth->suspend_lowmem_rx = 1; 575 schedule_delayed_work(&kaweth->lowmem_work, HZ/4); 576 } 577 err("resubmitting rx_urb %d failed", result); 578 } else { 579 kaweth->suspend_lowmem_rx = 0; 580 } 581 582 return result; 583 } 584 585 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth); 586 587 /**************************************************************** 588 * kaweth_usb_receive 589 ****************************************************************/ 590 static void kaweth_usb_receive(struct urb *urb) 591 { 592 struct kaweth_device *kaweth = urb->context; 593 struct net_device *net = kaweth->net; 594 int status = urb->status; 595 596 int count = urb->actual_length; 597 int count2 = urb->transfer_buffer_length; 598 599 __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf); 600 601 struct sk_buff *skb; 602 603 if (unlikely(status == -EPIPE)) { 604 kaweth->stats.rx_errors++; 605 kaweth->end = 1; 606 wake_up(&kaweth->term_wait); 607 dbg("Status was -EPIPE."); 608 return; 609 } 610 if (unlikely(status == -ECONNRESET || status == -ESHUTDOWN)) { 611 /* we are killed - set a flag and wake the disconnect handler */ 612 kaweth->end = 1; 613 wake_up(&kaweth->term_wait); 614 dbg("Status was -ECONNRESET or -ESHUTDOWN."); 615 return; 616 } 617 if (unlikely(status == -EPROTO || status == -ETIME || 618 status == -EILSEQ)) { 619 kaweth->stats.rx_errors++; 620 dbg("Status was -EPROTO, -ETIME, or -EILSEQ."); 621 return; 622 } 623 if (unlikely(status == -EOVERFLOW)) { 624 kaweth->stats.rx_errors++; 625 dbg("Status was -EOVERFLOW."); 626 } 627 spin_lock(&kaweth->device_lock); 628 if (IS_BLOCKED(kaweth->status)) { 629 spin_unlock(&kaweth->device_lock); 630 return; 631 } 632 spin_unlock(&kaweth->device_lock); 633 634 if(status && status != -EREMOTEIO && count != 1) { 635 err("%s RX status: %d count: %d packet_len: %d", 636 net->name, 637 status, 638 count, 639 (int)pkt_len); 640 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 641 return; 642 } 643 644 if(kaweth->net && (count > 2)) { 645 if(pkt_len > (count - 2)) { 646 err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count); 647 err("Packet len & 2047: %x", pkt_len & 2047); 648 err("Count 2: %x", count2); 649 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 650 return; 651 } 652 653 if(!(skb = dev_alloc_skb(pkt_len+2))) { 654 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 655 return; 656 } 657 658 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */ 659 660 skb_copy_to_linear_data(skb, kaweth->rx_buf + 2, pkt_len); 661 662 skb_put(skb, pkt_len); 663 664 skb->protocol = eth_type_trans(skb, net); 665 666 netif_rx(skb); 667 668 kaweth->stats.rx_packets++; 669 kaweth->stats.rx_bytes += pkt_len; 670 } 671 672 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 673 } 674 675 /**************************************************************** 676 * kaweth_open 677 ****************************************************************/ 678 static int kaweth_open(struct net_device *net) 679 { 680 struct kaweth_device *kaweth = netdev_priv(net); 681 int res; 682 683 dbg("Opening network device."); 684 685 res = usb_autopm_get_interface(kaweth->intf); 686 if (res) { 687 err("Interface cannot be resumed."); 688 return -EIO; 689 } 690 res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL); 691 if (res) 692 goto err_out; 693 694 usb_fill_int_urb( 695 kaweth->irq_urb, 696 kaweth->dev, 697 usb_rcvintpipe(kaweth->dev, 3), 698 kaweth->intbuffer, 699 INTBUFFERSIZE, 700 int_callback, 701 kaweth, 702 250); /* overriding the descriptor */ 703 kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle; 704 kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 705 706 res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL); 707 if (res) { 708 usb_kill_urb(kaweth->rx_urb); 709 goto err_out; 710 } 711 kaweth->opened = 1; 712 713 netif_start_queue(net); 714 715 kaweth_async_set_rx_mode(kaweth); 716 return 0; 717 718 err_out: 719 usb_autopm_put_interface(kaweth->intf); 720 return -EIO; 721 } 722 723 /**************************************************************** 724 * kaweth_kill_urbs 725 ****************************************************************/ 726 static void kaweth_kill_urbs(struct kaweth_device *kaweth) 727 { 728 usb_kill_urb(kaweth->irq_urb); 729 usb_kill_urb(kaweth->rx_urb); 730 usb_kill_urb(kaweth->tx_urb); 731 732 cancel_delayed_work_sync(&kaweth->lowmem_work); 733 734 /* a scheduled work may have resubmitted, 735 we hit them again */ 736 usb_kill_urb(kaweth->irq_urb); 737 usb_kill_urb(kaweth->rx_urb); 738 } 739 740 /**************************************************************** 741 * kaweth_close 742 ****************************************************************/ 743 static int kaweth_close(struct net_device *net) 744 { 745 struct kaweth_device *kaweth = netdev_priv(net); 746 747 netif_stop_queue(net); 748 kaweth->opened = 0; 749 750 kaweth->status |= KAWETH_STATUS_CLOSING; 751 752 kaweth_kill_urbs(kaweth); 753 754 kaweth->status &= ~KAWETH_STATUS_CLOSING; 755 756 usb_autopm_put_interface(kaweth->intf); 757 758 return 0; 759 } 760 761 static void kaweth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) 762 { 763 struct kaweth_device *kaweth = netdev_priv(dev); 764 765 strlcpy(info->driver, driver_name, sizeof(info->driver)); 766 usb_make_path(kaweth->dev, info->bus_info, sizeof (info->bus_info)); 767 } 768 769 static u32 kaweth_get_link(struct net_device *dev) 770 { 771 struct kaweth_device *kaweth = netdev_priv(dev); 772 773 return kaweth->linkstate; 774 } 775 776 static const struct ethtool_ops ops = { 777 .get_drvinfo = kaweth_get_drvinfo, 778 .get_link = kaweth_get_link 779 }; 780 781 /**************************************************************** 782 * kaweth_usb_transmit_complete 783 ****************************************************************/ 784 static void kaweth_usb_transmit_complete(struct urb *urb) 785 { 786 struct kaweth_device *kaweth = urb->context; 787 struct sk_buff *skb = kaweth->tx_skb; 788 int status = urb->status; 789 790 if (unlikely(status != 0)) 791 if (status != -ENOENT) 792 dbg("%s: TX status %d.", kaweth->net->name, status); 793 794 netif_wake_queue(kaweth->net); 795 dev_kfree_skb_irq(skb); 796 } 797 798 /**************************************************************** 799 * kaweth_start_xmit 800 ****************************************************************/ 801 static netdev_tx_t kaweth_start_xmit(struct sk_buff *skb, 802 struct net_device *net) 803 { 804 struct kaweth_device *kaweth = netdev_priv(net); 805 __le16 *private_header; 806 807 int res; 808 809 spin_lock_irq(&kaweth->device_lock); 810 811 kaweth_async_set_rx_mode(kaweth); 812 netif_stop_queue(net); 813 if (IS_BLOCKED(kaweth->status)) { 814 goto skip; 815 } 816 817 /* We now decide whether we can put our special header into the sk_buff */ 818 if (skb_cloned(skb) || skb_headroom(skb) < 2) { 819 /* no such luck - we make our own */ 820 struct sk_buff *copied_skb; 821 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC); 822 dev_kfree_skb_irq(skb); 823 skb = copied_skb; 824 if (!copied_skb) { 825 kaweth->stats.tx_errors++; 826 netif_start_queue(net); 827 spin_unlock_irq(&kaweth->device_lock); 828 return NETDEV_TX_OK; 829 } 830 } 831 832 private_header = (__le16 *)__skb_push(skb, 2); 833 *private_header = cpu_to_le16(skb->len-2); 834 kaweth->tx_skb = skb; 835 836 usb_fill_bulk_urb(kaweth->tx_urb, 837 kaweth->dev, 838 usb_sndbulkpipe(kaweth->dev, 2), 839 private_header, 840 skb->len, 841 kaweth_usb_transmit_complete, 842 kaweth); 843 kaweth->end = 0; 844 845 if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC))) 846 { 847 dev_warn(&net->dev, "kaweth failed tx_urb %d\n", res); 848 skip: 849 kaweth->stats.tx_errors++; 850 851 netif_start_queue(net); 852 dev_kfree_skb_irq(skb); 853 } 854 else 855 { 856 kaweth->stats.tx_packets++; 857 kaweth->stats.tx_bytes += skb->len; 858 net->trans_start = jiffies; 859 } 860 861 spin_unlock_irq(&kaweth->device_lock); 862 863 return NETDEV_TX_OK; 864 } 865 866 /**************************************************************** 867 * kaweth_set_rx_mode 868 ****************************************************************/ 869 static void kaweth_set_rx_mode(struct net_device *net) 870 { 871 struct kaweth_device *kaweth = netdev_priv(net); 872 873 __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED | 874 KAWETH_PACKET_FILTER_BROADCAST | 875 KAWETH_PACKET_FILTER_MULTICAST; 876 877 dbg("Setting Rx mode to %d", packet_filter_bitmap); 878 879 netif_stop_queue(net); 880 881 if (net->flags & IFF_PROMISC) { 882 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS; 883 } 884 else if ((net->mc_count) || (net->flags & IFF_ALLMULTI)) { 885 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST; 886 } 887 888 kaweth->packet_filter_bitmap = packet_filter_bitmap; 889 netif_wake_queue(net); 890 } 891 892 /**************************************************************** 893 * kaweth_async_set_rx_mode 894 ****************************************************************/ 895 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth) 896 { 897 int result; 898 __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap; 899 900 kaweth->packet_filter_bitmap = 0; 901 if (packet_filter_bitmap == 0) 902 return; 903 904 if (in_interrupt()) 905 return; 906 907 result = kaweth_control(kaweth, 908 usb_sndctrlpipe(kaweth->dev, 0), 909 KAWETH_COMMAND_SET_PACKET_FILTER, 910 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 911 packet_filter_bitmap, 912 0, 913 (void *)&kaweth->scratch, 914 0, 915 KAWETH_CONTROL_TIMEOUT); 916 917 if(result < 0) { 918 err("Failed to set Rx mode: %d", result); 919 } 920 else { 921 dbg("Set Rx mode to %d", packet_filter_bitmap); 922 } 923 } 924 925 /**************************************************************** 926 * kaweth_netdev_stats 927 ****************************************************************/ 928 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev) 929 { 930 struct kaweth_device *kaweth = netdev_priv(dev); 931 return &kaweth->stats; 932 } 933 934 /**************************************************************** 935 * kaweth_tx_timeout 936 ****************************************************************/ 937 static void kaweth_tx_timeout(struct net_device *net) 938 { 939 struct kaweth_device *kaweth = netdev_priv(net); 940 941 dev_warn(&net->dev, "%s: Tx timed out. Resetting.\n", net->name); 942 kaweth->stats.tx_errors++; 943 net->trans_start = jiffies; 944 945 usb_unlink_urb(kaweth->tx_urb); 946 } 947 948 /**************************************************************** 949 * kaweth_suspend 950 ****************************************************************/ 951 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message) 952 { 953 struct kaweth_device *kaweth = usb_get_intfdata(intf); 954 unsigned long flags; 955 956 dbg("Suspending device"); 957 spin_lock_irqsave(&kaweth->device_lock, flags); 958 kaweth->status |= KAWETH_STATUS_SUSPENDING; 959 spin_unlock_irqrestore(&kaweth->device_lock, flags); 960 961 kaweth_kill_urbs(kaweth); 962 return 0; 963 } 964 965 /**************************************************************** 966 * kaweth_resume 967 ****************************************************************/ 968 static int kaweth_resume(struct usb_interface *intf) 969 { 970 struct kaweth_device *kaweth = usb_get_intfdata(intf); 971 unsigned long flags; 972 973 dbg("Resuming device"); 974 spin_lock_irqsave(&kaweth->device_lock, flags); 975 kaweth->status &= ~KAWETH_STATUS_SUSPENDING; 976 spin_unlock_irqrestore(&kaweth->device_lock, flags); 977 978 if (!kaweth->opened) 979 return 0; 980 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO); 981 kaweth_resubmit_int_urb(kaweth, GFP_NOIO); 982 983 return 0; 984 } 985 986 /**************************************************************** 987 * kaweth_probe 988 ****************************************************************/ 989 990 991 static const struct net_device_ops kaweth_netdev_ops = { 992 .ndo_open = kaweth_open, 993 .ndo_stop = kaweth_close, 994 .ndo_start_xmit = kaweth_start_xmit, 995 .ndo_tx_timeout = kaweth_tx_timeout, 996 .ndo_set_multicast_list = kaweth_set_rx_mode, 997 .ndo_get_stats = kaweth_netdev_stats, 998 .ndo_change_mtu = eth_change_mtu, 999 .ndo_set_mac_address = eth_mac_addr, 1000 .ndo_validate_addr = eth_validate_addr, 1001 }; 1002 1003 static int kaweth_probe( 1004 struct usb_interface *intf, 1005 const struct usb_device_id *id /* from id_table */ 1006 ) 1007 { 1008 struct usb_device *dev = interface_to_usbdev(intf); 1009 struct kaweth_device *kaweth; 1010 struct net_device *netdev; 1011 const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; 1012 int result = 0; 1013 1014 dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x", 1015 dev->devnum, 1016 le16_to_cpu(dev->descriptor.idVendor), 1017 le16_to_cpu(dev->descriptor.idProduct), 1018 le16_to_cpu(dev->descriptor.bcdDevice)); 1019 1020 dbg("Device at %p", dev); 1021 1022 dbg("Descriptor length: %x type: %x", 1023 (int)dev->descriptor.bLength, 1024 (int)dev->descriptor.bDescriptorType); 1025 1026 netdev = alloc_etherdev(sizeof(*kaweth)); 1027 if (!netdev) 1028 return -ENOMEM; 1029 1030 kaweth = netdev_priv(netdev); 1031 kaweth->dev = dev; 1032 kaweth->net = netdev; 1033 1034 spin_lock_init(&kaweth->device_lock); 1035 init_waitqueue_head(&kaweth->term_wait); 1036 1037 dbg("Resetting."); 1038 1039 kaweth_reset(kaweth); 1040 1041 /* 1042 * If high byte of bcdDevice is nonzero, firmware is already 1043 * downloaded. Don't try to do it again, or we'll hang the device. 1044 */ 1045 1046 if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) { 1047 dev_info(&intf->dev, "Firmware present in device.\n"); 1048 } else { 1049 /* Download the firmware */ 1050 dev_info(&intf->dev, "Downloading firmware...\n"); 1051 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL); 1052 if ((result = kaweth_download_firmware(kaweth, 1053 "kaweth/new_code.bin", 1054 100, 1055 2)) < 0) { 1056 err("Error downloading firmware (%d)", result); 1057 goto err_fw; 1058 } 1059 1060 if ((result = kaweth_download_firmware(kaweth, 1061 "kaweth/new_code_fix.bin", 1062 100, 1063 3)) < 0) { 1064 err("Error downloading firmware fix (%d)", result); 1065 goto err_fw; 1066 } 1067 1068 if ((result = kaweth_download_firmware(kaweth, 1069 "kaweth/trigger_code.bin", 1070 126, 1071 2)) < 0) { 1072 err("Error downloading trigger code (%d)", result); 1073 goto err_fw; 1074 1075 } 1076 1077 if ((result = kaweth_download_firmware(kaweth, 1078 "kaweth/trigger_code_fix.bin", 1079 126, 1080 3)) < 0) { 1081 err("Error downloading trigger code fix (%d)", result); 1082 goto err_fw; 1083 } 1084 1085 1086 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) { 1087 err("Error triggering firmware (%d)", result); 1088 goto err_fw; 1089 } 1090 1091 /* Device will now disappear for a moment... */ 1092 dev_info(&intf->dev, "Firmware loaded. I'll be back...\n"); 1093 err_fw: 1094 free_page((unsigned long)kaweth->firmware_buf); 1095 free_netdev(netdev); 1096 return -EIO; 1097 } 1098 1099 result = kaweth_read_configuration(kaweth); 1100 1101 if(result < 0) { 1102 err("Error reading configuration (%d), no net device created", result); 1103 goto err_free_netdev; 1104 } 1105 1106 dev_info(&intf->dev, "Statistics collection: %x\n", kaweth->configuration.statistics_mask); 1107 dev_info(&intf->dev, "Multicast filter limit: %x\n", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1)); 1108 dev_info(&intf->dev, "MTU: %d\n", le16_to_cpu(kaweth->configuration.segment_size)); 1109 dev_info(&intf->dev, "Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n", 1110 (int)kaweth->configuration.hw_addr[0], 1111 (int)kaweth->configuration.hw_addr[1], 1112 (int)kaweth->configuration.hw_addr[2], 1113 (int)kaweth->configuration.hw_addr[3], 1114 (int)kaweth->configuration.hw_addr[4], 1115 (int)kaweth->configuration.hw_addr[5]); 1116 1117 if(!memcmp(&kaweth->configuration.hw_addr, 1118 &bcast_addr, 1119 sizeof(bcast_addr))) { 1120 err("Firmware not functioning properly, no net device created"); 1121 goto err_free_netdev; 1122 } 1123 1124 if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) { 1125 dbg("Error setting URB size"); 1126 goto err_free_netdev; 1127 } 1128 1129 if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) { 1130 err("Error setting SOFS wait"); 1131 goto err_free_netdev; 1132 } 1133 1134 result = kaweth_set_receive_filter(kaweth, 1135 KAWETH_PACKET_FILTER_DIRECTED | 1136 KAWETH_PACKET_FILTER_BROADCAST | 1137 KAWETH_PACKET_FILTER_MULTICAST); 1138 1139 if(result < 0) { 1140 err("Error setting receive filter"); 1141 goto err_free_netdev; 1142 } 1143 1144 dbg("Initializing net device."); 1145 1146 kaweth->intf = intf; 1147 1148 kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 1149 if (!kaweth->tx_urb) 1150 goto err_free_netdev; 1151 kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL); 1152 if (!kaweth->rx_urb) 1153 goto err_only_tx; 1154 kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL); 1155 if (!kaweth->irq_urb) 1156 goto err_tx_and_rx; 1157 1158 kaweth->intbuffer = usb_buffer_alloc( kaweth->dev, 1159 INTBUFFERSIZE, 1160 GFP_KERNEL, 1161 &kaweth->intbufferhandle); 1162 if (!kaweth->intbuffer) 1163 goto err_tx_and_rx_and_irq; 1164 kaweth->rx_buf = usb_buffer_alloc( kaweth->dev, 1165 KAWETH_BUF_SIZE, 1166 GFP_KERNEL, 1167 &kaweth->rxbufferhandle); 1168 if (!kaweth->rx_buf) 1169 goto err_all_but_rxbuf; 1170 1171 memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr)); 1172 memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr, 1173 sizeof(kaweth->configuration.hw_addr)); 1174 1175 netdev->netdev_ops = &kaweth_netdev_ops; 1176 netdev->watchdog_timeo = KAWETH_TX_TIMEOUT; 1177 netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size); 1178 SET_ETHTOOL_OPS(netdev, &ops); 1179 1180 /* kaweth is zeroed as part of alloc_netdev */ 1181 INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl); 1182 usb_set_intfdata(intf, kaweth); 1183 1184 #if 0 1185 // dma_supported() is deeply broken on almost all architectures 1186 if (dma_supported (&intf->dev, 0xffffffffffffffffULL)) 1187 kaweth->net->features |= NETIF_F_HIGHDMA; 1188 #endif 1189 1190 SET_NETDEV_DEV(netdev, &intf->dev); 1191 if (register_netdev(netdev) != 0) { 1192 err("Error registering netdev."); 1193 goto err_intfdata; 1194 } 1195 1196 dev_info(&intf->dev, "kaweth interface created at %s\n", 1197 kaweth->net->name); 1198 1199 dbg("Kaweth probe returning."); 1200 1201 return 0; 1202 1203 err_intfdata: 1204 usb_set_intfdata(intf, NULL); 1205 usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle); 1206 err_all_but_rxbuf: 1207 usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle); 1208 err_tx_and_rx_and_irq: 1209 usb_free_urb(kaweth->irq_urb); 1210 err_tx_and_rx: 1211 usb_free_urb(kaweth->rx_urb); 1212 err_only_tx: 1213 usb_free_urb(kaweth->tx_urb); 1214 err_free_netdev: 1215 free_netdev(netdev); 1216 1217 return -EIO; 1218 } 1219 1220 /**************************************************************** 1221 * kaweth_disconnect 1222 ****************************************************************/ 1223 static void kaweth_disconnect(struct usb_interface *intf) 1224 { 1225 struct kaweth_device *kaweth = usb_get_intfdata(intf); 1226 struct net_device *netdev; 1227 1228 dev_info(&intf->dev, "Unregistering\n"); 1229 1230 usb_set_intfdata(intf, NULL); 1231 if (!kaweth) { 1232 dev_warn(&intf->dev, "unregistering non-existant device\n"); 1233 return; 1234 } 1235 netdev = kaweth->net; 1236 1237 dbg("Unregistering net device"); 1238 unregister_netdev(netdev); 1239 1240 usb_free_urb(kaweth->rx_urb); 1241 usb_free_urb(kaweth->tx_urb); 1242 usb_free_urb(kaweth->irq_urb); 1243 1244 usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle); 1245 usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle); 1246 1247 free_netdev(netdev); 1248 } 1249 1250 1251 // FIXME this completion stuff is a modified clone of 1252 // an OLD version of some stuff in usb.c ... 1253 struct usb_api_data { 1254 wait_queue_head_t wqh; 1255 int done; 1256 }; 1257 1258 /*-------------------------------------------------------------------* 1259 * completion handler for compatibility wrappers (sync control/bulk) * 1260 *-------------------------------------------------------------------*/ 1261 static void usb_api_blocking_completion(struct urb *urb) 1262 { 1263 struct usb_api_data *awd = (struct usb_api_data *)urb->context; 1264 1265 awd->done=1; 1266 wake_up(&awd->wqh); 1267 } 1268 1269 /*-------------------------------------------------------------------* 1270 * COMPATIBILITY STUFF * 1271 *-------------------------------------------------------------------*/ 1272 1273 // Starts urb and waits for completion or timeout 1274 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length) 1275 { 1276 struct usb_api_data awd; 1277 int status; 1278 1279 init_waitqueue_head(&awd.wqh); 1280 awd.done = 0; 1281 1282 urb->context = &awd; 1283 status = usb_submit_urb(urb, GFP_NOIO); 1284 if (status) { 1285 // something went wrong 1286 usb_free_urb(urb); 1287 return status; 1288 } 1289 1290 if (!wait_event_timeout(awd.wqh, awd.done, timeout)) { 1291 // timeout 1292 dev_warn(&urb->dev->dev, "usb_control/bulk_msg: timeout\n"); 1293 usb_kill_urb(urb); // remove urb safely 1294 status = -ETIMEDOUT; 1295 } 1296 else { 1297 status = urb->status; 1298 } 1299 1300 if (actual_length) { 1301 *actual_length = urb->actual_length; 1302 } 1303 1304 usb_free_urb(urb); 1305 return status; 1306 } 1307 1308 /*-------------------------------------------------------------------*/ 1309 // returns status (negative) or length (positive) 1310 static int kaweth_internal_control_msg(struct usb_device *usb_dev, 1311 unsigned int pipe, 1312 struct usb_ctrlrequest *cmd, void *data, 1313 int len, int timeout) 1314 { 1315 struct urb *urb; 1316 int retv; 1317 int length = 0; /* shut up GCC */ 1318 1319 urb = usb_alloc_urb(0, GFP_NOIO); 1320 if (!urb) 1321 return -ENOMEM; 1322 1323 usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data, 1324 len, usb_api_blocking_completion, NULL); 1325 1326 retv = usb_start_wait_urb(urb, timeout, &length); 1327 if (retv < 0) { 1328 return retv; 1329 } 1330 else { 1331 return length; 1332 } 1333 } 1334 1335 1336 /**************************************************************** 1337 * kaweth_init 1338 ****************************************************************/ 1339 static int __init kaweth_init(void) 1340 { 1341 dbg("Driver loading"); 1342 return usb_register(&kaweth_driver); 1343 } 1344 1345 /**************************************************************** 1346 * kaweth_exit 1347 ****************************************************************/ 1348 static void __exit kaweth_exit(void) 1349 { 1350 usb_deregister(&kaweth_driver); 1351 } 1352 1353 module_init(kaweth_init); 1354 module_exit(kaweth_exit); 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364