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; 266 267 dbg("kaweth_control()"); 268 269 if(in_interrupt()) { 270 dbg("in_interrupt()"); 271 return -EBUSY; 272 } 273 274 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC); 275 276 if (!dr) { 277 dbg("kmalloc() failed"); 278 return -ENOMEM; 279 } 280 281 dr->bRequestType= requesttype; 282 dr->bRequest = request; 283 dr->wValue = cpu_to_le16(value); 284 dr->wIndex = cpu_to_le16(index); 285 dr->wLength = cpu_to_le16(size); 286 287 return kaweth_internal_control_msg(kaweth->dev, 288 pipe, 289 dr, 290 data, 291 size, 292 timeout); 293 } 294 295 /**************************************************************** 296 * kaweth_read_configuration 297 ****************************************************************/ 298 static int kaweth_read_configuration(struct kaweth_device *kaweth) 299 { 300 int retval; 301 302 dbg("Reading kaweth configuration"); 303 304 retval = kaweth_control(kaweth, 305 usb_rcvctrlpipe(kaweth->dev, 0), 306 KAWETH_COMMAND_GET_ETHERNET_DESC, 307 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE, 308 0, 309 0, 310 (void *)&kaweth->configuration, 311 sizeof(kaweth->configuration), 312 KAWETH_CONTROL_TIMEOUT); 313 314 return retval; 315 } 316 317 /**************************************************************** 318 * kaweth_set_urb_size 319 ****************************************************************/ 320 static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size) 321 { 322 int retval; 323 324 dbg("Setting URB size to %d", (unsigned)urb_size); 325 326 retval = kaweth_control(kaweth, 327 usb_sndctrlpipe(kaweth->dev, 0), 328 KAWETH_COMMAND_SET_URB_SIZE, 329 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 330 urb_size, 331 0, 332 (void *)&kaweth->scratch, 333 0, 334 KAWETH_CONTROL_TIMEOUT); 335 336 return retval; 337 } 338 339 /**************************************************************** 340 * kaweth_set_sofs_wait 341 ****************************************************************/ 342 static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait) 343 { 344 int retval; 345 346 dbg("Set SOFS wait to %d", (unsigned)sofs_wait); 347 348 retval = kaweth_control(kaweth, 349 usb_sndctrlpipe(kaweth->dev, 0), 350 KAWETH_COMMAND_SET_SOFS_WAIT, 351 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 352 sofs_wait, 353 0, 354 (void *)&kaweth->scratch, 355 0, 356 KAWETH_CONTROL_TIMEOUT); 357 358 return retval; 359 } 360 361 /**************************************************************** 362 * kaweth_set_receive_filter 363 ****************************************************************/ 364 static int kaweth_set_receive_filter(struct kaweth_device *kaweth, 365 __u16 receive_filter) 366 { 367 int retval; 368 369 dbg("Set receive filter to %d", (unsigned)receive_filter); 370 371 retval = kaweth_control(kaweth, 372 usb_sndctrlpipe(kaweth->dev, 0), 373 KAWETH_COMMAND_SET_PACKET_FILTER, 374 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 375 receive_filter, 376 0, 377 (void *)&kaweth->scratch, 378 0, 379 KAWETH_CONTROL_TIMEOUT); 380 381 return retval; 382 } 383 384 /**************************************************************** 385 * kaweth_download_firmware 386 ****************************************************************/ 387 static int kaweth_download_firmware(struct kaweth_device *kaweth, 388 const char *fwname, 389 __u8 interrupt, 390 __u8 type) 391 { 392 const struct firmware *fw; 393 int data_len; 394 int ret; 395 396 ret = request_firmware(&fw, fwname, &kaweth->dev->dev); 397 if (ret) { 398 err("Firmware request failed\n"); 399 return ret; 400 } 401 402 if (fw->size > KAWETH_FIRMWARE_BUF_SIZE) { 403 err("Firmware too big: %zu", fw->size); 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 dbg("High: %i, Low:%i", kaweth->firmware_buf[3], 417 kaweth->firmware_buf[2]); 418 419 dbg("Downloading firmware at %p to kaweth device at %p", 420 fw->data, kaweth); 421 dbg("Firmware length: %d", data_len); 422 423 return kaweth_control(kaweth, 424 usb_sndctrlpipe(kaweth->dev, 0), 425 KAWETH_COMMAND_SCAN, 426 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 427 0, 428 0, 429 (void *)kaweth->firmware_buf, 430 data_len, 431 KAWETH_CONTROL_TIMEOUT); 432 } 433 434 /**************************************************************** 435 * kaweth_trigger_firmware 436 ****************************************************************/ 437 static int kaweth_trigger_firmware(struct kaweth_device *kaweth, 438 __u8 interrupt) 439 { 440 kaweth->firmware_buf[0] = 0xB6; 441 kaweth->firmware_buf[1] = 0xC3; 442 kaweth->firmware_buf[2] = 0x01; 443 kaweth->firmware_buf[3] = 0x00; 444 kaweth->firmware_buf[4] = 0x06; 445 kaweth->firmware_buf[5] = interrupt; 446 kaweth->firmware_buf[6] = 0x00; 447 kaweth->firmware_buf[7] = 0x00; 448 449 dbg("Triggering firmware"); 450 451 return kaweth_control(kaweth, 452 usb_sndctrlpipe(kaweth->dev, 0), 453 KAWETH_COMMAND_SCAN, 454 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 455 0, 456 0, 457 (void *)kaweth->firmware_buf, 458 8, 459 KAWETH_CONTROL_TIMEOUT); 460 } 461 462 /**************************************************************** 463 * kaweth_reset 464 ****************************************************************/ 465 static int kaweth_reset(struct kaweth_device *kaweth) 466 { 467 int result; 468 469 dbg("kaweth_reset(%p)", kaweth); 470 result = kaweth_control(kaweth, 471 usb_sndctrlpipe(kaweth->dev, 0), 472 USB_REQ_SET_CONFIGURATION, 473 0, 474 kaweth->dev->config[0].desc.bConfigurationValue, 475 0, 476 NULL, 477 0, 478 KAWETH_CONTROL_TIMEOUT); 479 480 mdelay(10); 481 482 dbg("kaweth_reset() returns %d.",result); 483 484 return result; 485 } 486 487 static void kaweth_usb_receive(struct urb *); 488 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t); 489 490 /**************************************************************** 491 int_callback 492 *****************************************************************/ 493 494 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf) 495 { 496 int status; 497 498 status = usb_submit_urb (kaweth->irq_urb, mf); 499 if (unlikely(status == -ENOMEM)) { 500 kaweth->suspend_lowmem_ctrl = 1; 501 schedule_delayed_work(&kaweth->lowmem_work, HZ/4); 502 } else { 503 kaweth->suspend_lowmem_ctrl = 0; 504 } 505 506 if (status) 507 err ("can't resubmit intr, %s-%s, status %d", 508 kaweth->dev->bus->bus_name, 509 kaweth->dev->devpath, status); 510 } 511 512 static void int_callback(struct urb *u) 513 { 514 struct kaweth_device *kaweth = u->context; 515 int act_state; 516 int status = u->status; 517 518 switch (status) { 519 case 0: /* success */ 520 break; 521 case -ECONNRESET: /* unlink */ 522 case -ENOENT: 523 case -ESHUTDOWN: 524 return; 525 /* -EPIPE: should clear the halt */ 526 default: /* error */ 527 goto resubmit; 528 } 529 530 /* we check the link state to report changes */ 531 if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) { 532 if (act_state) 533 netif_carrier_on(kaweth->net); 534 else 535 netif_carrier_off(kaweth->net); 536 537 kaweth->linkstate = act_state; 538 } 539 resubmit: 540 kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC); 541 } 542 543 static void kaweth_resubmit_tl(struct work_struct *work) 544 { 545 struct kaweth_device *kaweth = 546 container_of(work, struct kaweth_device, lowmem_work.work); 547 548 if (IS_BLOCKED(kaweth->status)) 549 return; 550 551 if (kaweth->suspend_lowmem_rx) 552 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO); 553 554 if (kaweth->suspend_lowmem_ctrl) 555 kaweth_resubmit_int_urb(kaweth, GFP_NOIO); 556 } 557 558 559 /**************************************************************** 560 * kaweth_resubmit_rx_urb 561 ****************************************************************/ 562 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth, 563 gfp_t mem_flags) 564 { 565 int result; 566 567 usb_fill_bulk_urb(kaweth->rx_urb, 568 kaweth->dev, 569 usb_rcvbulkpipe(kaweth->dev, 1), 570 kaweth->rx_buf, 571 KAWETH_BUF_SIZE, 572 kaweth_usb_receive, 573 kaweth); 574 kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 575 kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle; 576 577 if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) { 578 if (result == -ENOMEM) { 579 kaweth->suspend_lowmem_rx = 1; 580 schedule_delayed_work(&kaweth->lowmem_work, HZ/4); 581 } 582 err("resubmitting rx_urb %d failed", result); 583 } else { 584 kaweth->suspend_lowmem_rx = 0; 585 } 586 587 return result; 588 } 589 590 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth); 591 592 /**************************************************************** 593 * kaweth_usb_receive 594 ****************************************************************/ 595 static void kaweth_usb_receive(struct urb *urb) 596 { 597 struct kaweth_device *kaweth = urb->context; 598 struct net_device *net = kaweth->net; 599 int status = urb->status; 600 601 int count = urb->actual_length; 602 int count2 = urb->transfer_buffer_length; 603 604 __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf); 605 606 struct sk_buff *skb; 607 608 if (unlikely(status == -EPIPE)) { 609 kaweth->stats.rx_errors++; 610 kaweth->end = 1; 611 wake_up(&kaweth->term_wait); 612 dbg("Status was -EPIPE."); 613 return; 614 } 615 if (unlikely(status == -ECONNRESET || status == -ESHUTDOWN)) { 616 /* we are killed - set a flag and wake the disconnect handler */ 617 kaweth->end = 1; 618 wake_up(&kaweth->term_wait); 619 dbg("Status was -ECONNRESET or -ESHUTDOWN."); 620 return; 621 } 622 if (unlikely(status == -EPROTO || status == -ETIME || 623 status == -EILSEQ)) { 624 kaweth->stats.rx_errors++; 625 dbg("Status was -EPROTO, -ETIME, or -EILSEQ."); 626 return; 627 } 628 if (unlikely(status == -EOVERFLOW)) { 629 kaweth->stats.rx_errors++; 630 dbg("Status was -EOVERFLOW."); 631 } 632 spin_lock(&kaweth->device_lock); 633 if (IS_BLOCKED(kaweth->status)) { 634 spin_unlock(&kaweth->device_lock); 635 return; 636 } 637 spin_unlock(&kaweth->device_lock); 638 639 if(status && status != -EREMOTEIO && count != 1) { 640 err("%s RX status: %d count: %d packet_len: %d", 641 net->name, 642 status, 643 count, 644 (int)pkt_len); 645 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 646 return; 647 } 648 649 if(kaweth->net && (count > 2)) { 650 if(pkt_len > (count - 2)) { 651 err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count); 652 err("Packet len & 2047: %x", pkt_len & 2047); 653 err("Count 2: %x", count2); 654 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 655 return; 656 } 657 658 if(!(skb = dev_alloc_skb(pkt_len+2))) { 659 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 660 return; 661 } 662 663 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */ 664 665 skb_copy_to_linear_data(skb, kaweth->rx_buf + 2, pkt_len); 666 667 skb_put(skb, pkt_len); 668 669 skb->protocol = eth_type_trans(skb, net); 670 671 netif_rx(skb); 672 673 kaweth->stats.rx_packets++; 674 kaweth->stats.rx_bytes += pkt_len; 675 } 676 677 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 678 } 679 680 /**************************************************************** 681 * kaweth_open 682 ****************************************************************/ 683 static int kaweth_open(struct net_device *net) 684 { 685 struct kaweth_device *kaweth = netdev_priv(net); 686 int res; 687 688 dbg("Opening network device."); 689 690 res = usb_autopm_get_interface(kaweth->intf); 691 if (res) { 692 err("Interface cannot be resumed."); 693 return -EIO; 694 } 695 res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL); 696 if (res) 697 goto err_out; 698 699 usb_fill_int_urb( 700 kaweth->irq_urb, 701 kaweth->dev, 702 usb_rcvintpipe(kaweth->dev, 3), 703 kaweth->intbuffer, 704 INTBUFFERSIZE, 705 int_callback, 706 kaweth, 707 250); /* overriding the descriptor */ 708 kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle; 709 kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 710 711 res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL); 712 if (res) { 713 usb_kill_urb(kaweth->rx_urb); 714 goto err_out; 715 } 716 kaweth->opened = 1; 717 718 netif_start_queue(net); 719 720 kaweth_async_set_rx_mode(kaweth); 721 return 0; 722 723 err_out: 724 usb_autopm_enable(kaweth->intf); 725 return -EIO; 726 } 727 728 /**************************************************************** 729 * kaweth_kill_urbs 730 ****************************************************************/ 731 static void kaweth_kill_urbs(struct kaweth_device *kaweth) 732 { 733 usb_kill_urb(kaweth->irq_urb); 734 usb_kill_urb(kaweth->rx_urb); 735 usb_kill_urb(kaweth->tx_urb); 736 737 cancel_delayed_work_sync(&kaweth->lowmem_work); 738 739 /* a scheduled work may have resubmitted, 740 we hit them again */ 741 usb_kill_urb(kaweth->irq_urb); 742 usb_kill_urb(kaweth->rx_urb); 743 } 744 745 /**************************************************************** 746 * kaweth_close 747 ****************************************************************/ 748 static int kaweth_close(struct net_device *net) 749 { 750 struct kaweth_device *kaweth = netdev_priv(net); 751 752 netif_stop_queue(net); 753 kaweth->opened = 0; 754 755 kaweth->status |= KAWETH_STATUS_CLOSING; 756 757 kaweth_kill_urbs(kaweth); 758 759 kaweth->status &= ~KAWETH_STATUS_CLOSING; 760 761 usb_autopm_enable(kaweth->intf); 762 763 return 0; 764 } 765 766 static void kaweth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) 767 { 768 struct kaweth_device *kaweth = netdev_priv(dev); 769 770 strlcpy(info->driver, driver_name, sizeof(info->driver)); 771 usb_make_path(kaweth->dev, info->bus_info, sizeof (info->bus_info)); 772 } 773 774 static u32 kaweth_get_link(struct net_device *dev) 775 { 776 struct kaweth_device *kaweth = netdev_priv(dev); 777 778 return kaweth->linkstate; 779 } 780 781 static const struct ethtool_ops ops = { 782 .get_drvinfo = kaweth_get_drvinfo, 783 .get_link = kaweth_get_link 784 }; 785 786 /**************************************************************** 787 * kaweth_usb_transmit_complete 788 ****************************************************************/ 789 static void kaweth_usb_transmit_complete(struct urb *urb) 790 { 791 struct kaweth_device *kaweth = urb->context; 792 struct sk_buff *skb = kaweth->tx_skb; 793 int status = urb->status; 794 795 if (unlikely(status != 0)) 796 if (status != -ENOENT) 797 dbg("%s: TX status %d.", kaweth->net->name, status); 798 799 netif_wake_queue(kaweth->net); 800 dev_kfree_skb_irq(skb); 801 } 802 803 /**************************************************************** 804 * kaweth_start_xmit 805 ****************************************************************/ 806 static netdev_tx_t kaweth_start_xmit(struct sk_buff *skb, 807 struct net_device *net) 808 { 809 struct kaweth_device *kaweth = netdev_priv(net); 810 __le16 *private_header; 811 812 int res; 813 814 spin_lock_irq(&kaweth->device_lock); 815 816 kaweth_async_set_rx_mode(kaweth); 817 netif_stop_queue(net); 818 if (IS_BLOCKED(kaweth->status)) { 819 goto skip; 820 } 821 822 /* We now decide whether we can put our special header into the sk_buff */ 823 if (skb_cloned(skb) || skb_headroom(skb) < 2) { 824 /* no such luck - we make our own */ 825 struct sk_buff *copied_skb; 826 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC); 827 dev_kfree_skb_irq(skb); 828 skb = copied_skb; 829 if (!copied_skb) { 830 kaweth->stats.tx_errors++; 831 netif_start_queue(net); 832 spin_unlock_irq(&kaweth->device_lock); 833 return NETDEV_TX_OK; 834 } 835 } 836 837 private_header = (__le16 *)__skb_push(skb, 2); 838 *private_header = cpu_to_le16(skb->len-2); 839 kaweth->tx_skb = skb; 840 841 usb_fill_bulk_urb(kaweth->tx_urb, 842 kaweth->dev, 843 usb_sndbulkpipe(kaweth->dev, 2), 844 private_header, 845 skb->len, 846 kaweth_usb_transmit_complete, 847 kaweth); 848 kaweth->end = 0; 849 850 if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC))) 851 { 852 dev_warn(&net->dev, "kaweth failed tx_urb %d\n", res); 853 skip: 854 kaweth->stats.tx_errors++; 855 856 netif_start_queue(net); 857 dev_kfree_skb_irq(skb); 858 } 859 else 860 { 861 kaweth->stats.tx_packets++; 862 kaweth->stats.tx_bytes += skb->len; 863 net->trans_start = jiffies; 864 } 865 866 spin_unlock_irq(&kaweth->device_lock); 867 868 return NETDEV_TX_OK; 869 } 870 871 /**************************************************************** 872 * kaweth_set_rx_mode 873 ****************************************************************/ 874 static void kaweth_set_rx_mode(struct net_device *net) 875 { 876 struct kaweth_device *kaweth = netdev_priv(net); 877 878 __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED | 879 KAWETH_PACKET_FILTER_BROADCAST | 880 KAWETH_PACKET_FILTER_MULTICAST; 881 882 dbg("Setting Rx mode to %d", packet_filter_bitmap); 883 884 netif_stop_queue(net); 885 886 if (net->flags & IFF_PROMISC) { 887 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS; 888 } 889 else if ((net->mc_count) || (net->flags & IFF_ALLMULTI)) { 890 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST; 891 } 892 893 kaweth->packet_filter_bitmap = packet_filter_bitmap; 894 netif_wake_queue(net); 895 } 896 897 /**************************************************************** 898 * kaweth_async_set_rx_mode 899 ****************************************************************/ 900 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth) 901 { 902 int result; 903 __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap; 904 905 kaweth->packet_filter_bitmap = 0; 906 if (packet_filter_bitmap == 0) 907 return; 908 909 if (in_interrupt()) 910 return; 911 912 result = kaweth_control(kaweth, 913 usb_sndctrlpipe(kaweth->dev, 0), 914 KAWETH_COMMAND_SET_PACKET_FILTER, 915 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 916 packet_filter_bitmap, 917 0, 918 (void *)&kaweth->scratch, 919 0, 920 KAWETH_CONTROL_TIMEOUT); 921 922 if(result < 0) { 923 err("Failed to set Rx mode: %d", result); 924 } 925 else { 926 dbg("Set Rx mode to %d", packet_filter_bitmap); 927 } 928 } 929 930 /**************************************************************** 931 * kaweth_netdev_stats 932 ****************************************************************/ 933 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev) 934 { 935 struct kaweth_device *kaweth = netdev_priv(dev); 936 return &kaweth->stats; 937 } 938 939 /**************************************************************** 940 * kaweth_tx_timeout 941 ****************************************************************/ 942 static void kaweth_tx_timeout(struct net_device *net) 943 { 944 struct kaweth_device *kaweth = netdev_priv(net); 945 946 dev_warn(&net->dev, "%s: Tx timed out. Resetting.\n", net->name); 947 kaweth->stats.tx_errors++; 948 net->trans_start = jiffies; 949 950 usb_unlink_urb(kaweth->tx_urb); 951 } 952 953 /**************************************************************** 954 * kaweth_suspend 955 ****************************************************************/ 956 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message) 957 { 958 struct kaweth_device *kaweth = usb_get_intfdata(intf); 959 unsigned long flags; 960 961 dbg("Suspending device"); 962 spin_lock_irqsave(&kaweth->device_lock, flags); 963 kaweth->status |= KAWETH_STATUS_SUSPENDING; 964 spin_unlock_irqrestore(&kaweth->device_lock, flags); 965 966 kaweth_kill_urbs(kaweth); 967 return 0; 968 } 969 970 /**************************************************************** 971 * kaweth_resume 972 ****************************************************************/ 973 static int kaweth_resume(struct usb_interface *intf) 974 { 975 struct kaweth_device *kaweth = usb_get_intfdata(intf); 976 unsigned long flags; 977 978 dbg("Resuming device"); 979 spin_lock_irqsave(&kaweth->device_lock, flags); 980 kaweth->status &= ~KAWETH_STATUS_SUSPENDING; 981 spin_unlock_irqrestore(&kaweth->device_lock, flags); 982 983 if (!kaweth->opened) 984 return 0; 985 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO); 986 kaweth_resubmit_int_urb(kaweth, GFP_NOIO); 987 988 return 0; 989 } 990 991 /**************************************************************** 992 * kaweth_probe 993 ****************************************************************/ 994 995 996 static const struct net_device_ops kaweth_netdev_ops = { 997 .ndo_open = kaweth_open, 998 .ndo_stop = kaweth_close, 999 .ndo_start_xmit = kaweth_start_xmit, 1000 .ndo_tx_timeout = kaweth_tx_timeout, 1001 .ndo_set_multicast_list = kaweth_set_rx_mode, 1002 .ndo_get_stats = kaweth_netdev_stats, 1003 .ndo_change_mtu = eth_change_mtu, 1004 .ndo_set_mac_address = eth_mac_addr, 1005 .ndo_validate_addr = eth_validate_addr, 1006 }; 1007 1008 static int kaweth_probe( 1009 struct usb_interface *intf, 1010 const struct usb_device_id *id /* from id_table */ 1011 ) 1012 { 1013 struct usb_device *dev = interface_to_usbdev(intf); 1014 struct kaweth_device *kaweth; 1015 struct net_device *netdev; 1016 const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; 1017 int result = 0; 1018 1019 dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x", 1020 dev->devnum, 1021 le16_to_cpu(dev->descriptor.idVendor), 1022 le16_to_cpu(dev->descriptor.idProduct), 1023 le16_to_cpu(dev->descriptor.bcdDevice)); 1024 1025 dbg("Device at %p", dev); 1026 1027 dbg("Descriptor length: %x type: %x", 1028 (int)dev->descriptor.bLength, 1029 (int)dev->descriptor.bDescriptorType); 1030 1031 netdev = alloc_etherdev(sizeof(*kaweth)); 1032 if (!netdev) 1033 return -ENOMEM; 1034 1035 kaweth = netdev_priv(netdev); 1036 kaweth->dev = dev; 1037 kaweth->net = netdev; 1038 1039 spin_lock_init(&kaweth->device_lock); 1040 init_waitqueue_head(&kaweth->term_wait); 1041 1042 dbg("Resetting."); 1043 1044 kaweth_reset(kaweth); 1045 1046 /* 1047 * If high byte of bcdDevice is nonzero, firmware is already 1048 * downloaded. Don't try to do it again, or we'll hang the device. 1049 */ 1050 1051 if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) { 1052 dev_info(&intf->dev, "Firmware present in device.\n"); 1053 } else { 1054 /* Download the firmware */ 1055 dev_info(&intf->dev, "Downloading firmware...\n"); 1056 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL); 1057 if ((result = kaweth_download_firmware(kaweth, 1058 "kaweth/new_code.bin", 1059 100, 1060 2)) < 0) { 1061 err("Error downloading firmware (%d)", result); 1062 goto err_fw; 1063 } 1064 1065 if ((result = kaweth_download_firmware(kaweth, 1066 "kaweth/new_code_fix.bin", 1067 100, 1068 3)) < 0) { 1069 err("Error downloading firmware fix (%d)", result); 1070 goto err_fw; 1071 } 1072 1073 if ((result = kaweth_download_firmware(kaweth, 1074 "kaweth/trigger_code.bin", 1075 126, 1076 2)) < 0) { 1077 err("Error downloading trigger code (%d)", result); 1078 goto err_fw; 1079 1080 } 1081 1082 if ((result = kaweth_download_firmware(kaweth, 1083 "kaweth/trigger_code_fix.bin", 1084 126, 1085 3)) < 0) { 1086 err("Error downloading trigger code fix (%d)", result); 1087 goto err_fw; 1088 } 1089 1090 1091 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) { 1092 err("Error triggering firmware (%d)", result); 1093 goto err_fw; 1094 } 1095 1096 /* Device will now disappear for a moment... */ 1097 dev_info(&intf->dev, "Firmware loaded. I'll be back...\n"); 1098 err_fw: 1099 free_page((unsigned long)kaweth->firmware_buf); 1100 free_netdev(netdev); 1101 return -EIO; 1102 } 1103 1104 result = kaweth_read_configuration(kaweth); 1105 1106 if(result < 0) { 1107 err("Error reading configuration (%d), no net device created", result); 1108 goto err_free_netdev; 1109 } 1110 1111 dev_info(&intf->dev, "Statistics collection: %x\n", kaweth->configuration.statistics_mask); 1112 dev_info(&intf->dev, "Multicast filter limit: %x\n", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1)); 1113 dev_info(&intf->dev, "MTU: %d\n", le16_to_cpu(kaweth->configuration.segment_size)); 1114 dev_info(&intf->dev, "Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n", 1115 (int)kaweth->configuration.hw_addr[0], 1116 (int)kaweth->configuration.hw_addr[1], 1117 (int)kaweth->configuration.hw_addr[2], 1118 (int)kaweth->configuration.hw_addr[3], 1119 (int)kaweth->configuration.hw_addr[4], 1120 (int)kaweth->configuration.hw_addr[5]); 1121 1122 if(!memcmp(&kaweth->configuration.hw_addr, 1123 &bcast_addr, 1124 sizeof(bcast_addr))) { 1125 err("Firmware not functioning properly, no net device created"); 1126 goto err_free_netdev; 1127 } 1128 1129 if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) { 1130 dbg("Error setting URB size"); 1131 goto err_free_netdev; 1132 } 1133 1134 if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) { 1135 err("Error setting SOFS wait"); 1136 goto err_free_netdev; 1137 } 1138 1139 result = kaweth_set_receive_filter(kaweth, 1140 KAWETH_PACKET_FILTER_DIRECTED | 1141 KAWETH_PACKET_FILTER_BROADCAST | 1142 KAWETH_PACKET_FILTER_MULTICAST); 1143 1144 if(result < 0) { 1145 err("Error setting receive filter"); 1146 goto err_free_netdev; 1147 } 1148 1149 dbg("Initializing net device."); 1150 1151 kaweth->intf = intf; 1152 1153 kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 1154 if (!kaweth->tx_urb) 1155 goto err_free_netdev; 1156 kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL); 1157 if (!kaweth->rx_urb) 1158 goto err_only_tx; 1159 kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL); 1160 if (!kaweth->irq_urb) 1161 goto err_tx_and_rx; 1162 1163 kaweth->intbuffer = usb_buffer_alloc( kaweth->dev, 1164 INTBUFFERSIZE, 1165 GFP_KERNEL, 1166 &kaweth->intbufferhandle); 1167 if (!kaweth->intbuffer) 1168 goto err_tx_and_rx_and_irq; 1169 kaweth->rx_buf = usb_buffer_alloc( kaweth->dev, 1170 KAWETH_BUF_SIZE, 1171 GFP_KERNEL, 1172 &kaweth->rxbufferhandle); 1173 if (!kaweth->rx_buf) 1174 goto err_all_but_rxbuf; 1175 1176 memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr)); 1177 memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr, 1178 sizeof(kaweth->configuration.hw_addr)); 1179 1180 netdev->netdev_ops = &kaweth_netdev_ops; 1181 netdev->watchdog_timeo = KAWETH_TX_TIMEOUT; 1182 netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size); 1183 SET_ETHTOOL_OPS(netdev, &ops); 1184 1185 /* kaweth is zeroed as part of alloc_netdev */ 1186 INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl); 1187 usb_set_intfdata(intf, kaweth); 1188 1189 #if 0 1190 // dma_supported() is deeply broken on almost all architectures 1191 if (dma_supported (&intf->dev, 0xffffffffffffffffULL)) 1192 kaweth->net->features |= NETIF_F_HIGHDMA; 1193 #endif 1194 1195 SET_NETDEV_DEV(netdev, &intf->dev); 1196 if (register_netdev(netdev) != 0) { 1197 err("Error registering netdev."); 1198 goto err_intfdata; 1199 } 1200 1201 dev_info(&intf->dev, "kaweth interface created at %s\n", 1202 kaweth->net->name); 1203 1204 dbg("Kaweth probe returning."); 1205 1206 return 0; 1207 1208 err_intfdata: 1209 usb_set_intfdata(intf, NULL); 1210 usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle); 1211 err_all_but_rxbuf: 1212 usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle); 1213 err_tx_and_rx_and_irq: 1214 usb_free_urb(kaweth->irq_urb); 1215 err_tx_and_rx: 1216 usb_free_urb(kaweth->rx_urb); 1217 err_only_tx: 1218 usb_free_urb(kaweth->tx_urb); 1219 err_free_netdev: 1220 free_netdev(netdev); 1221 1222 return -EIO; 1223 } 1224 1225 /**************************************************************** 1226 * kaweth_disconnect 1227 ****************************************************************/ 1228 static void kaweth_disconnect(struct usb_interface *intf) 1229 { 1230 struct kaweth_device *kaweth = usb_get_intfdata(intf); 1231 struct net_device *netdev; 1232 1233 dev_info(&intf->dev, "Unregistering\n"); 1234 1235 usb_set_intfdata(intf, NULL); 1236 if (!kaweth) { 1237 dev_warn(&intf->dev, "unregistering non-existant device\n"); 1238 return; 1239 } 1240 netdev = kaweth->net; 1241 1242 dbg("Unregistering net device"); 1243 unregister_netdev(netdev); 1244 1245 usb_free_urb(kaweth->rx_urb); 1246 usb_free_urb(kaweth->tx_urb); 1247 usb_free_urb(kaweth->irq_urb); 1248 1249 usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle); 1250 usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle); 1251 1252 free_netdev(netdev); 1253 } 1254 1255 1256 // FIXME this completion stuff is a modified clone of 1257 // an OLD version of some stuff in usb.c ... 1258 struct usb_api_data { 1259 wait_queue_head_t wqh; 1260 int done; 1261 }; 1262 1263 /*-------------------------------------------------------------------* 1264 * completion handler for compatibility wrappers (sync control/bulk) * 1265 *-------------------------------------------------------------------*/ 1266 static void usb_api_blocking_completion(struct urb *urb) 1267 { 1268 struct usb_api_data *awd = (struct usb_api_data *)urb->context; 1269 1270 awd->done=1; 1271 wake_up(&awd->wqh); 1272 } 1273 1274 /*-------------------------------------------------------------------* 1275 * COMPATIBILITY STUFF * 1276 *-------------------------------------------------------------------*/ 1277 1278 // Starts urb and waits for completion or timeout 1279 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length) 1280 { 1281 struct usb_api_data awd; 1282 int status; 1283 1284 init_waitqueue_head(&awd.wqh); 1285 awd.done = 0; 1286 1287 urb->context = &awd; 1288 status = usb_submit_urb(urb, GFP_NOIO); 1289 if (status) { 1290 // something went wrong 1291 usb_free_urb(urb); 1292 return status; 1293 } 1294 1295 if (!wait_event_timeout(awd.wqh, awd.done, timeout)) { 1296 // timeout 1297 dev_warn(&urb->dev->dev, "usb_control/bulk_msg: timeout\n"); 1298 usb_kill_urb(urb); // remove urb safely 1299 status = -ETIMEDOUT; 1300 } 1301 else { 1302 status = urb->status; 1303 } 1304 1305 if (actual_length) { 1306 *actual_length = urb->actual_length; 1307 } 1308 1309 usb_free_urb(urb); 1310 return status; 1311 } 1312 1313 /*-------------------------------------------------------------------*/ 1314 // returns status (negative) or length (positive) 1315 static int kaweth_internal_control_msg(struct usb_device *usb_dev, 1316 unsigned int pipe, 1317 struct usb_ctrlrequest *cmd, void *data, 1318 int len, int timeout) 1319 { 1320 struct urb *urb; 1321 int retv; 1322 int length = 0; /* shut up GCC */ 1323 1324 urb = usb_alloc_urb(0, GFP_NOIO); 1325 if (!urb) 1326 return -ENOMEM; 1327 1328 usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data, 1329 len, usb_api_blocking_completion, NULL); 1330 1331 retv = usb_start_wait_urb(urb, timeout, &length); 1332 if (retv < 0) { 1333 return retv; 1334 } 1335 else { 1336 return length; 1337 } 1338 } 1339 1340 1341 /**************************************************************** 1342 * kaweth_init 1343 ****************************************************************/ 1344 static int __init kaweth_init(void) 1345 { 1346 dbg("Driver loading"); 1347 return usb_register(&kaweth_driver); 1348 } 1349 1350 /**************************************************************** 1351 * kaweth_exit 1352 ****************************************************************/ 1353 static void __exit kaweth_exit(void) 1354 { 1355 usb_deregister(&kaweth_driver); 1356 } 1357 1358 module_init(kaweth_init); 1359 module_exit(kaweth_exit); 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369