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(0x07c9, 0xb010) }, /* Allied Telesyn AT-USB10 USB Ethernet Adapter */ 149 { USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */ 150 { USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */ 151 { USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */ 152 { USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */ 153 { USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */ 154 { USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */ 155 { USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */ 156 { USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */ 157 { USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */ 158 { USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */ 159 { USB_DEVICE(0x1485, 0x0001) }, /* Silicom U2E */ 160 { USB_DEVICE(0x1485, 0x0002) }, /* Psion Dacom Gold Port Ethernet */ 161 { USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */ 162 { USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */ 163 { USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */ 164 { USB_DEVICE(0x1668, 0x0323) }, /* Actiontec USB Ethernet */ 165 { USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */ 166 {} /* Null terminator */ 167 }; 168 169 MODULE_DEVICE_TABLE (usb, usb_klsi_table); 170 171 /**************************************************************** 172 * kaweth_driver 173 ****************************************************************/ 174 static struct usb_driver kaweth_driver = { 175 .name = driver_name, 176 .probe = kaweth_probe, 177 .disconnect = kaweth_disconnect, 178 .suspend = kaweth_suspend, 179 .resume = kaweth_resume, 180 .id_table = usb_klsi_table, 181 .supports_autosuspend = 1, 182 }; 183 184 typedef __u8 eth_addr_t[6]; 185 186 /**************************************************************** 187 * usb_eth_dev 188 ****************************************************************/ 189 struct usb_eth_dev { 190 char *name; 191 __u16 vendor; 192 __u16 device; 193 void *pdata; 194 }; 195 196 /**************************************************************** 197 * kaweth_ethernet_configuration 198 * Refer Table 8 199 ****************************************************************/ 200 struct kaweth_ethernet_configuration 201 { 202 __u8 size; 203 __u8 reserved1; 204 __u8 reserved2; 205 eth_addr_t hw_addr; 206 __u32 statistics_mask; 207 __le16 segment_size; 208 __u16 max_multicast_filters; 209 __u8 reserved3; 210 } __attribute__ ((packed)); 211 212 /**************************************************************** 213 * kaweth_device 214 ****************************************************************/ 215 struct kaweth_device 216 { 217 spinlock_t device_lock; 218 219 __u32 status; 220 int end; 221 int suspend_lowmem_rx; 222 int suspend_lowmem_ctrl; 223 int linkstate; 224 int opened; 225 struct delayed_work lowmem_work; 226 227 struct usb_device *dev; 228 struct usb_interface *intf; 229 struct net_device *net; 230 wait_queue_head_t term_wait; 231 232 struct urb *rx_urb; 233 struct urb *tx_urb; 234 struct urb *irq_urb; 235 236 dma_addr_t intbufferhandle; 237 __u8 *intbuffer; 238 dma_addr_t rxbufferhandle; 239 __u8 *rx_buf; 240 241 242 struct sk_buff *tx_skb; 243 244 __u8 *firmware_buf; 245 __u8 scratch[KAWETH_SCRATCH_SIZE]; 246 __u16 packet_filter_bitmap; 247 248 struct kaweth_ethernet_configuration configuration; 249 250 struct net_device_stats stats; 251 }; 252 253 /**************************************************************** 254 * kaweth_control 255 ****************************************************************/ 256 static int kaweth_control(struct kaweth_device *kaweth, 257 unsigned int pipe, 258 __u8 request, 259 __u8 requesttype, 260 __u16 value, 261 __u16 index, 262 void *data, 263 __u16 size, 264 int timeout) 265 { 266 struct usb_ctrlrequest *dr; 267 int retval; 268 269 dbg("kaweth_control()"); 270 271 if(in_interrupt()) { 272 dbg("in_interrupt()"); 273 return -EBUSY; 274 } 275 276 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC); 277 278 if (!dr) { 279 dbg("kmalloc() failed"); 280 return -ENOMEM; 281 } 282 283 dr->bRequestType = requesttype; 284 dr->bRequest = request; 285 dr->wValue = cpu_to_le16(value); 286 dr->wIndex = cpu_to_le16(index); 287 dr->wLength = cpu_to_le16(size); 288 289 retval = kaweth_internal_control_msg(kaweth->dev, 290 pipe, 291 dr, 292 data, 293 size, 294 timeout); 295 296 kfree(dr); 297 return retval; 298 } 299 300 /**************************************************************** 301 * kaweth_read_configuration 302 ****************************************************************/ 303 static int kaweth_read_configuration(struct kaweth_device *kaweth) 304 { 305 int retval; 306 307 dbg("Reading kaweth configuration"); 308 309 retval = kaweth_control(kaweth, 310 usb_rcvctrlpipe(kaweth->dev, 0), 311 KAWETH_COMMAND_GET_ETHERNET_DESC, 312 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE, 313 0, 314 0, 315 (void *)&kaweth->configuration, 316 sizeof(kaweth->configuration), 317 KAWETH_CONTROL_TIMEOUT); 318 319 return retval; 320 } 321 322 /**************************************************************** 323 * kaweth_set_urb_size 324 ****************************************************************/ 325 static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size) 326 { 327 int retval; 328 329 dbg("Setting URB size to %d", (unsigned)urb_size); 330 331 retval = kaweth_control(kaweth, 332 usb_sndctrlpipe(kaweth->dev, 0), 333 KAWETH_COMMAND_SET_URB_SIZE, 334 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 335 urb_size, 336 0, 337 (void *)&kaweth->scratch, 338 0, 339 KAWETH_CONTROL_TIMEOUT); 340 341 return retval; 342 } 343 344 /**************************************************************** 345 * kaweth_set_sofs_wait 346 ****************************************************************/ 347 static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait) 348 { 349 int retval; 350 351 dbg("Set SOFS wait to %d", (unsigned)sofs_wait); 352 353 retval = kaweth_control(kaweth, 354 usb_sndctrlpipe(kaweth->dev, 0), 355 KAWETH_COMMAND_SET_SOFS_WAIT, 356 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 357 sofs_wait, 358 0, 359 (void *)&kaweth->scratch, 360 0, 361 KAWETH_CONTROL_TIMEOUT); 362 363 return retval; 364 } 365 366 /**************************************************************** 367 * kaweth_set_receive_filter 368 ****************************************************************/ 369 static int kaweth_set_receive_filter(struct kaweth_device *kaweth, 370 __u16 receive_filter) 371 { 372 int retval; 373 374 dbg("Set receive filter to %d", (unsigned)receive_filter); 375 376 retval = kaweth_control(kaweth, 377 usb_sndctrlpipe(kaweth->dev, 0), 378 KAWETH_COMMAND_SET_PACKET_FILTER, 379 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 380 receive_filter, 381 0, 382 (void *)&kaweth->scratch, 383 0, 384 KAWETH_CONTROL_TIMEOUT); 385 386 return retval; 387 } 388 389 /**************************************************************** 390 * kaweth_download_firmware 391 ****************************************************************/ 392 static int kaweth_download_firmware(struct kaweth_device *kaweth, 393 const char *fwname, 394 __u8 interrupt, 395 __u8 type) 396 { 397 const struct firmware *fw; 398 int data_len; 399 int ret; 400 401 ret = request_firmware(&fw, fwname, &kaweth->dev->dev); 402 if (ret) { 403 err("Firmware request failed\n"); 404 return ret; 405 } 406 407 if (fw->size > KAWETH_FIRMWARE_BUF_SIZE) { 408 err("Firmware too big: %zu", fw->size); 409 return -ENOSPC; 410 } 411 data_len = fw->size; 412 memcpy(kaweth->firmware_buf, fw->data, fw->size); 413 414 release_firmware(fw); 415 416 kaweth->firmware_buf[2] = (data_len & 0xFF) - 7; 417 kaweth->firmware_buf[3] = data_len >> 8; 418 kaweth->firmware_buf[4] = type; 419 kaweth->firmware_buf[5] = interrupt; 420 421 dbg("High: %i, Low:%i", kaweth->firmware_buf[3], 422 kaweth->firmware_buf[2]); 423 424 dbg("Downloading firmware at %p to kaweth device at %p", 425 fw->data, kaweth); 426 dbg("Firmware length: %d", data_len); 427 428 return kaweth_control(kaweth, 429 usb_sndctrlpipe(kaweth->dev, 0), 430 KAWETH_COMMAND_SCAN, 431 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 432 0, 433 0, 434 (void *)kaweth->firmware_buf, 435 data_len, 436 KAWETH_CONTROL_TIMEOUT); 437 } 438 439 /**************************************************************** 440 * kaweth_trigger_firmware 441 ****************************************************************/ 442 static int kaweth_trigger_firmware(struct kaweth_device *kaweth, 443 __u8 interrupt) 444 { 445 kaweth->firmware_buf[0] = 0xB6; 446 kaweth->firmware_buf[1] = 0xC3; 447 kaweth->firmware_buf[2] = 0x01; 448 kaweth->firmware_buf[3] = 0x00; 449 kaweth->firmware_buf[4] = 0x06; 450 kaweth->firmware_buf[5] = interrupt; 451 kaweth->firmware_buf[6] = 0x00; 452 kaweth->firmware_buf[7] = 0x00; 453 454 dbg("Triggering firmware"); 455 456 return kaweth_control(kaweth, 457 usb_sndctrlpipe(kaweth->dev, 0), 458 KAWETH_COMMAND_SCAN, 459 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 460 0, 461 0, 462 (void *)kaweth->firmware_buf, 463 8, 464 KAWETH_CONTROL_TIMEOUT); 465 } 466 467 /**************************************************************** 468 * kaweth_reset 469 ****************************************************************/ 470 static int kaweth_reset(struct kaweth_device *kaweth) 471 { 472 int result; 473 474 dbg("kaweth_reset(%p)", kaweth); 475 result = usb_reset_configuration(kaweth->dev); 476 mdelay(10); 477 478 dbg("kaweth_reset() returns %d.",result); 479 480 return result; 481 } 482 483 static void kaweth_usb_receive(struct urb *); 484 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t); 485 486 /**************************************************************** 487 int_callback 488 *****************************************************************/ 489 490 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf) 491 { 492 int status; 493 494 status = usb_submit_urb (kaweth->irq_urb, mf); 495 if (unlikely(status == -ENOMEM)) { 496 kaweth->suspend_lowmem_ctrl = 1; 497 schedule_delayed_work(&kaweth->lowmem_work, HZ/4); 498 } else { 499 kaweth->suspend_lowmem_ctrl = 0; 500 } 501 502 if (status) 503 err ("can't resubmit intr, %s-%s, status %d", 504 kaweth->dev->bus->bus_name, 505 kaweth->dev->devpath, status); 506 } 507 508 static void int_callback(struct urb *u) 509 { 510 struct kaweth_device *kaweth = u->context; 511 int act_state; 512 int status = u->status; 513 514 switch (status) { 515 case 0: /* success */ 516 break; 517 case -ECONNRESET: /* unlink */ 518 case -ENOENT: 519 case -ESHUTDOWN: 520 return; 521 /* -EPIPE: should clear the halt */ 522 default: /* error */ 523 goto resubmit; 524 } 525 526 /* we check the link state to report changes */ 527 if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) { 528 if (act_state) 529 netif_carrier_on(kaweth->net); 530 else 531 netif_carrier_off(kaweth->net); 532 533 kaweth->linkstate = act_state; 534 } 535 resubmit: 536 kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC); 537 } 538 539 static void kaweth_resubmit_tl(struct work_struct *work) 540 { 541 struct kaweth_device *kaweth = 542 container_of(work, struct kaweth_device, lowmem_work.work); 543 544 if (IS_BLOCKED(kaweth->status)) 545 return; 546 547 if (kaweth->suspend_lowmem_rx) 548 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO); 549 550 if (kaweth->suspend_lowmem_ctrl) 551 kaweth_resubmit_int_urb(kaweth, GFP_NOIO); 552 } 553 554 555 /**************************************************************** 556 * kaweth_resubmit_rx_urb 557 ****************************************************************/ 558 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth, 559 gfp_t mem_flags) 560 { 561 int result; 562 563 usb_fill_bulk_urb(kaweth->rx_urb, 564 kaweth->dev, 565 usb_rcvbulkpipe(kaweth->dev, 1), 566 kaweth->rx_buf, 567 KAWETH_BUF_SIZE, 568 kaweth_usb_receive, 569 kaweth); 570 kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 571 kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle; 572 573 if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) { 574 if (result == -ENOMEM) { 575 kaweth->suspend_lowmem_rx = 1; 576 schedule_delayed_work(&kaweth->lowmem_work, HZ/4); 577 } 578 err("resubmitting rx_urb %d failed", result); 579 } else { 580 kaweth->suspend_lowmem_rx = 0; 581 } 582 583 return result; 584 } 585 586 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth); 587 588 /**************************************************************** 589 * kaweth_usb_receive 590 ****************************************************************/ 591 static void kaweth_usb_receive(struct urb *urb) 592 { 593 struct kaweth_device *kaweth = urb->context; 594 struct net_device *net = kaweth->net; 595 int status = urb->status; 596 597 int count = urb->actual_length; 598 int count2 = urb->transfer_buffer_length; 599 600 __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf); 601 602 struct sk_buff *skb; 603 604 if (unlikely(status == -EPIPE)) { 605 kaweth->stats.rx_errors++; 606 kaweth->end = 1; 607 wake_up(&kaweth->term_wait); 608 dbg("Status was -EPIPE."); 609 return; 610 } 611 if (unlikely(status == -ECONNRESET || status == -ESHUTDOWN)) { 612 /* we are killed - set a flag and wake the disconnect handler */ 613 kaweth->end = 1; 614 wake_up(&kaweth->term_wait); 615 dbg("Status was -ECONNRESET or -ESHUTDOWN."); 616 return; 617 } 618 if (unlikely(status == -EPROTO || status == -ETIME || 619 status == -EILSEQ)) { 620 kaweth->stats.rx_errors++; 621 dbg("Status was -EPROTO, -ETIME, or -EILSEQ."); 622 return; 623 } 624 if (unlikely(status == -EOVERFLOW)) { 625 kaweth->stats.rx_errors++; 626 dbg("Status was -EOVERFLOW."); 627 } 628 spin_lock(&kaweth->device_lock); 629 if (IS_BLOCKED(kaweth->status)) { 630 spin_unlock(&kaweth->device_lock); 631 return; 632 } 633 spin_unlock(&kaweth->device_lock); 634 635 if(status && status != -EREMOTEIO && count != 1) { 636 err("%s RX status: %d count: %d packet_len: %d", 637 net->name, 638 status, 639 count, 640 (int)pkt_len); 641 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 642 return; 643 } 644 645 if(kaweth->net && (count > 2)) { 646 if(pkt_len > (count - 2)) { 647 err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count); 648 err("Packet len & 2047: %x", pkt_len & 2047); 649 err("Count 2: %x", count2); 650 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 651 return; 652 } 653 654 if(!(skb = dev_alloc_skb(pkt_len+2))) { 655 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 656 return; 657 } 658 659 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */ 660 661 skb_copy_to_linear_data(skb, kaweth->rx_buf + 2, pkt_len); 662 663 skb_put(skb, pkt_len); 664 665 skb->protocol = eth_type_trans(skb, net); 666 667 netif_rx(skb); 668 669 kaweth->stats.rx_packets++; 670 kaweth->stats.rx_bytes += pkt_len; 671 } 672 673 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 674 } 675 676 /**************************************************************** 677 * kaweth_open 678 ****************************************************************/ 679 static int kaweth_open(struct net_device *net) 680 { 681 struct kaweth_device *kaweth = netdev_priv(net); 682 int res; 683 684 dbg("Opening network device."); 685 686 res = usb_autopm_get_interface(kaweth->intf); 687 if (res) { 688 err("Interface cannot be resumed."); 689 return -EIO; 690 } 691 res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL); 692 if (res) 693 goto err_out; 694 695 usb_fill_int_urb( 696 kaweth->irq_urb, 697 kaweth->dev, 698 usb_rcvintpipe(kaweth->dev, 3), 699 kaweth->intbuffer, 700 INTBUFFERSIZE, 701 int_callback, 702 kaweth, 703 250); /* overriding the descriptor */ 704 kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle; 705 kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 706 707 res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL); 708 if (res) { 709 usb_kill_urb(kaweth->rx_urb); 710 goto err_out; 711 } 712 kaweth->opened = 1; 713 714 netif_start_queue(net); 715 716 kaweth_async_set_rx_mode(kaweth); 717 return 0; 718 719 err_out: 720 usb_autopm_put_interface(kaweth->intf); 721 return -EIO; 722 } 723 724 /**************************************************************** 725 * kaweth_kill_urbs 726 ****************************************************************/ 727 static void kaweth_kill_urbs(struct kaweth_device *kaweth) 728 { 729 usb_kill_urb(kaweth->irq_urb); 730 usb_kill_urb(kaweth->rx_urb); 731 usb_kill_urb(kaweth->tx_urb); 732 733 cancel_delayed_work_sync(&kaweth->lowmem_work); 734 735 /* a scheduled work may have resubmitted, 736 we hit them again */ 737 usb_kill_urb(kaweth->irq_urb); 738 usb_kill_urb(kaweth->rx_urb); 739 } 740 741 /**************************************************************** 742 * kaweth_close 743 ****************************************************************/ 744 static int kaweth_close(struct net_device *net) 745 { 746 struct kaweth_device *kaweth = netdev_priv(net); 747 748 netif_stop_queue(net); 749 kaweth->opened = 0; 750 751 kaweth->status |= KAWETH_STATUS_CLOSING; 752 753 kaweth_kill_urbs(kaweth); 754 755 kaweth->status &= ~KAWETH_STATUS_CLOSING; 756 757 usb_autopm_put_interface(kaweth->intf); 758 759 return 0; 760 } 761 762 static void kaweth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) 763 { 764 struct kaweth_device *kaweth = netdev_priv(dev); 765 766 strlcpy(info->driver, driver_name, sizeof(info->driver)); 767 usb_make_path(kaweth->dev, info->bus_info, sizeof (info->bus_info)); 768 } 769 770 static u32 kaweth_get_link(struct net_device *dev) 771 { 772 struct kaweth_device *kaweth = netdev_priv(dev); 773 774 return kaweth->linkstate; 775 } 776 777 static const struct ethtool_ops ops = { 778 .get_drvinfo = kaweth_get_drvinfo, 779 .get_link = kaweth_get_link 780 }; 781 782 /**************************************************************** 783 * kaweth_usb_transmit_complete 784 ****************************************************************/ 785 static void kaweth_usb_transmit_complete(struct urb *urb) 786 { 787 struct kaweth_device *kaweth = urb->context; 788 struct sk_buff *skb = kaweth->tx_skb; 789 int status = urb->status; 790 791 if (unlikely(status != 0)) 792 if (status != -ENOENT) 793 dbg("%s: TX status %d.", kaweth->net->name, status); 794 795 netif_wake_queue(kaweth->net); 796 dev_kfree_skb_irq(skb); 797 } 798 799 /**************************************************************** 800 * kaweth_start_xmit 801 ****************************************************************/ 802 static netdev_tx_t kaweth_start_xmit(struct sk_buff *skb, 803 struct net_device *net) 804 { 805 struct kaweth_device *kaweth = netdev_priv(net); 806 __le16 *private_header; 807 808 int res; 809 810 spin_lock_irq(&kaweth->device_lock); 811 812 kaweth_async_set_rx_mode(kaweth); 813 netif_stop_queue(net); 814 if (IS_BLOCKED(kaweth->status)) { 815 goto skip; 816 } 817 818 /* We now decide whether we can put our special header into the sk_buff */ 819 if (skb_cloned(skb) || skb_headroom(skb) < 2) { 820 /* no such luck - we make our own */ 821 struct sk_buff *copied_skb; 822 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC); 823 dev_kfree_skb_irq(skb); 824 skb = copied_skb; 825 if (!copied_skb) { 826 kaweth->stats.tx_errors++; 827 netif_start_queue(net); 828 spin_unlock_irq(&kaweth->device_lock); 829 return NETDEV_TX_OK; 830 } 831 } 832 833 private_header = (__le16 *)__skb_push(skb, 2); 834 *private_header = cpu_to_le16(skb->len-2); 835 kaweth->tx_skb = skb; 836 837 usb_fill_bulk_urb(kaweth->tx_urb, 838 kaweth->dev, 839 usb_sndbulkpipe(kaweth->dev, 2), 840 private_header, 841 skb->len, 842 kaweth_usb_transmit_complete, 843 kaweth); 844 kaweth->end = 0; 845 846 if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC))) 847 { 848 dev_warn(&net->dev, "kaweth failed tx_urb %d\n", res); 849 skip: 850 kaweth->stats.tx_errors++; 851 852 netif_start_queue(net); 853 dev_kfree_skb_irq(skb); 854 } 855 else 856 { 857 kaweth->stats.tx_packets++; 858 kaweth->stats.tx_bytes += skb->len; 859 net->trans_start = jiffies; 860 } 861 862 spin_unlock_irq(&kaweth->device_lock); 863 864 return NETDEV_TX_OK; 865 } 866 867 /**************************************************************** 868 * kaweth_set_rx_mode 869 ****************************************************************/ 870 static void kaweth_set_rx_mode(struct net_device *net) 871 { 872 struct kaweth_device *kaweth = netdev_priv(net); 873 874 __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED | 875 KAWETH_PACKET_FILTER_BROADCAST | 876 KAWETH_PACKET_FILTER_MULTICAST; 877 878 dbg("Setting Rx mode to %d", packet_filter_bitmap); 879 880 netif_stop_queue(net); 881 882 if (net->flags & IFF_PROMISC) { 883 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS; 884 } 885 else if (!netdev_mc_empty(net) || (net->flags & IFF_ALLMULTI)) { 886 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST; 887 } 888 889 kaweth->packet_filter_bitmap = packet_filter_bitmap; 890 netif_wake_queue(net); 891 } 892 893 /**************************************************************** 894 * kaweth_async_set_rx_mode 895 ****************************************************************/ 896 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth) 897 { 898 int result; 899 __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap; 900 901 kaweth->packet_filter_bitmap = 0; 902 if (packet_filter_bitmap == 0) 903 return; 904 905 if (in_interrupt()) 906 return; 907 908 result = kaweth_control(kaweth, 909 usb_sndctrlpipe(kaweth->dev, 0), 910 KAWETH_COMMAND_SET_PACKET_FILTER, 911 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 912 packet_filter_bitmap, 913 0, 914 (void *)&kaweth->scratch, 915 0, 916 KAWETH_CONTROL_TIMEOUT); 917 918 if(result < 0) { 919 err("Failed to set Rx mode: %d", result); 920 } 921 else { 922 dbg("Set Rx mode to %d", packet_filter_bitmap); 923 } 924 } 925 926 /**************************************************************** 927 * kaweth_netdev_stats 928 ****************************************************************/ 929 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev) 930 { 931 struct kaweth_device *kaweth = netdev_priv(dev); 932 return &kaweth->stats; 933 } 934 935 /**************************************************************** 936 * kaweth_tx_timeout 937 ****************************************************************/ 938 static void kaweth_tx_timeout(struct net_device *net) 939 { 940 struct kaweth_device *kaweth = netdev_priv(net); 941 942 dev_warn(&net->dev, "%s: Tx timed out. Resetting.\n", net->name); 943 kaweth->stats.tx_errors++; 944 net->trans_start = jiffies; 945 946 usb_unlink_urb(kaweth->tx_urb); 947 } 948 949 /**************************************************************** 950 * kaweth_suspend 951 ****************************************************************/ 952 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message) 953 { 954 struct kaweth_device *kaweth = usb_get_intfdata(intf); 955 unsigned long flags; 956 957 dbg("Suspending device"); 958 spin_lock_irqsave(&kaweth->device_lock, flags); 959 kaweth->status |= KAWETH_STATUS_SUSPENDING; 960 spin_unlock_irqrestore(&kaweth->device_lock, flags); 961 962 kaweth_kill_urbs(kaweth); 963 return 0; 964 } 965 966 /**************************************************************** 967 * kaweth_resume 968 ****************************************************************/ 969 static int kaweth_resume(struct usb_interface *intf) 970 { 971 struct kaweth_device *kaweth = usb_get_intfdata(intf); 972 unsigned long flags; 973 974 dbg("Resuming device"); 975 spin_lock_irqsave(&kaweth->device_lock, flags); 976 kaweth->status &= ~KAWETH_STATUS_SUSPENDING; 977 spin_unlock_irqrestore(&kaweth->device_lock, flags); 978 979 if (!kaweth->opened) 980 return 0; 981 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO); 982 kaweth_resubmit_int_urb(kaweth, GFP_NOIO); 983 984 return 0; 985 } 986 987 /**************************************************************** 988 * kaweth_probe 989 ****************************************************************/ 990 991 992 static const struct net_device_ops kaweth_netdev_ops = { 993 .ndo_open = kaweth_open, 994 .ndo_stop = kaweth_close, 995 .ndo_start_xmit = kaweth_start_xmit, 996 .ndo_tx_timeout = kaweth_tx_timeout, 997 .ndo_set_multicast_list = kaweth_set_rx_mode, 998 .ndo_get_stats = kaweth_netdev_stats, 999 .ndo_change_mtu = eth_change_mtu, 1000 .ndo_set_mac_address = eth_mac_addr, 1001 .ndo_validate_addr = eth_validate_addr, 1002 }; 1003 1004 static int kaweth_probe( 1005 struct usb_interface *intf, 1006 const struct usb_device_id *id /* from id_table */ 1007 ) 1008 { 1009 struct usb_device *dev = interface_to_usbdev(intf); 1010 struct kaweth_device *kaweth; 1011 struct net_device *netdev; 1012 const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; 1013 int result = 0; 1014 1015 dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x", 1016 dev->devnum, 1017 le16_to_cpu(dev->descriptor.idVendor), 1018 le16_to_cpu(dev->descriptor.idProduct), 1019 le16_to_cpu(dev->descriptor.bcdDevice)); 1020 1021 dbg("Device at %p", dev); 1022 1023 dbg("Descriptor length: %x type: %x", 1024 (int)dev->descriptor.bLength, 1025 (int)dev->descriptor.bDescriptorType); 1026 1027 netdev = alloc_etherdev(sizeof(*kaweth)); 1028 if (!netdev) 1029 return -ENOMEM; 1030 1031 kaweth = netdev_priv(netdev); 1032 kaweth->dev = dev; 1033 kaweth->net = netdev; 1034 1035 spin_lock_init(&kaweth->device_lock); 1036 init_waitqueue_head(&kaweth->term_wait); 1037 1038 dbg("Resetting."); 1039 1040 kaweth_reset(kaweth); 1041 1042 /* 1043 * If high byte of bcdDevice is nonzero, firmware is already 1044 * downloaded. Don't try to do it again, or we'll hang the device. 1045 */ 1046 1047 if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) { 1048 dev_info(&intf->dev, "Firmware present in device.\n"); 1049 } else { 1050 /* Download the firmware */ 1051 dev_info(&intf->dev, "Downloading firmware...\n"); 1052 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL); 1053 if ((result = kaweth_download_firmware(kaweth, 1054 "kaweth/new_code.bin", 1055 100, 1056 2)) < 0) { 1057 err("Error downloading firmware (%d)", result); 1058 goto err_fw; 1059 } 1060 1061 if ((result = kaweth_download_firmware(kaweth, 1062 "kaweth/new_code_fix.bin", 1063 100, 1064 3)) < 0) { 1065 err("Error downloading firmware fix (%d)", result); 1066 goto err_fw; 1067 } 1068 1069 if ((result = kaweth_download_firmware(kaweth, 1070 "kaweth/trigger_code.bin", 1071 126, 1072 2)) < 0) { 1073 err("Error downloading trigger code (%d)", result); 1074 goto err_fw; 1075 1076 } 1077 1078 if ((result = kaweth_download_firmware(kaweth, 1079 "kaweth/trigger_code_fix.bin", 1080 126, 1081 3)) < 0) { 1082 err("Error downloading trigger code fix (%d)", result); 1083 goto err_fw; 1084 } 1085 1086 1087 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) { 1088 err("Error triggering firmware (%d)", result); 1089 goto err_fw; 1090 } 1091 1092 /* Device will now disappear for a moment... */ 1093 dev_info(&intf->dev, "Firmware loaded. I'll be back...\n"); 1094 err_fw: 1095 free_page((unsigned long)kaweth->firmware_buf); 1096 free_netdev(netdev); 1097 return -EIO; 1098 } 1099 1100 result = kaweth_read_configuration(kaweth); 1101 1102 if(result < 0) { 1103 err("Error reading configuration (%d), no net device created", result); 1104 goto err_free_netdev; 1105 } 1106 1107 dev_info(&intf->dev, "Statistics collection: %x\n", kaweth->configuration.statistics_mask); 1108 dev_info(&intf->dev, "Multicast filter limit: %x\n", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1)); 1109 dev_info(&intf->dev, "MTU: %d\n", le16_to_cpu(kaweth->configuration.segment_size)); 1110 dev_info(&intf->dev, "Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n", 1111 (int)kaweth->configuration.hw_addr[0], 1112 (int)kaweth->configuration.hw_addr[1], 1113 (int)kaweth->configuration.hw_addr[2], 1114 (int)kaweth->configuration.hw_addr[3], 1115 (int)kaweth->configuration.hw_addr[4], 1116 (int)kaweth->configuration.hw_addr[5]); 1117 1118 if(!memcmp(&kaweth->configuration.hw_addr, 1119 &bcast_addr, 1120 sizeof(bcast_addr))) { 1121 err("Firmware not functioning properly, no net device created"); 1122 goto err_free_netdev; 1123 } 1124 1125 if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) { 1126 dbg("Error setting URB size"); 1127 goto err_free_netdev; 1128 } 1129 1130 if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) { 1131 err("Error setting SOFS wait"); 1132 goto err_free_netdev; 1133 } 1134 1135 result = kaweth_set_receive_filter(kaweth, 1136 KAWETH_PACKET_FILTER_DIRECTED | 1137 KAWETH_PACKET_FILTER_BROADCAST | 1138 KAWETH_PACKET_FILTER_MULTICAST); 1139 1140 if(result < 0) { 1141 err("Error setting receive filter"); 1142 goto err_free_netdev; 1143 } 1144 1145 dbg("Initializing net device."); 1146 1147 kaweth->intf = intf; 1148 1149 kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 1150 if (!kaweth->tx_urb) 1151 goto err_free_netdev; 1152 kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL); 1153 if (!kaweth->rx_urb) 1154 goto err_only_tx; 1155 kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL); 1156 if (!kaweth->irq_urb) 1157 goto err_tx_and_rx; 1158 1159 kaweth->intbuffer = usb_buffer_alloc( kaweth->dev, 1160 INTBUFFERSIZE, 1161 GFP_KERNEL, 1162 &kaweth->intbufferhandle); 1163 if (!kaweth->intbuffer) 1164 goto err_tx_and_rx_and_irq; 1165 kaweth->rx_buf = usb_buffer_alloc( kaweth->dev, 1166 KAWETH_BUF_SIZE, 1167 GFP_KERNEL, 1168 &kaweth->rxbufferhandle); 1169 if (!kaweth->rx_buf) 1170 goto err_all_but_rxbuf; 1171 1172 memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr)); 1173 memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr, 1174 sizeof(kaweth->configuration.hw_addr)); 1175 1176 netdev->netdev_ops = &kaweth_netdev_ops; 1177 netdev->watchdog_timeo = KAWETH_TX_TIMEOUT; 1178 netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size); 1179 SET_ETHTOOL_OPS(netdev, &ops); 1180 1181 /* kaweth is zeroed as part of alloc_netdev */ 1182 INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl); 1183 usb_set_intfdata(intf, kaweth); 1184 1185 #if 0 1186 // dma_supported() is deeply broken on almost all architectures 1187 if (dma_supported (&intf->dev, 0xffffffffffffffffULL)) 1188 kaweth->net->features |= NETIF_F_HIGHDMA; 1189 #endif 1190 1191 SET_NETDEV_DEV(netdev, &intf->dev); 1192 if (register_netdev(netdev) != 0) { 1193 err("Error registering netdev."); 1194 goto err_intfdata; 1195 } 1196 1197 dev_info(&intf->dev, "kaweth interface created at %s\n", 1198 kaweth->net->name); 1199 1200 dbg("Kaweth probe returning."); 1201 1202 return 0; 1203 1204 err_intfdata: 1205 usb_set_intfdata(intf, NULL); 1206 usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle); 1207 err_all_but_rxbuf: 1208 usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle); 1209 err_tx_and_rx_and_irq: 1210 usb_free_urb(kaweth->irq_urb); 1211 err_tx_and_rx: 1212 usb_free_urb(kaweth->rx_urb); 1213 err_only_tx: 1214 usb_free_urb(kaweth->tx_urb); 1215 err_free_netdev: 1216 free_netdev(netdev); 1217 1218 return -EIO; 1219 } 1220 1221 /**************************************************************** 1222 * kaweth_disconnect 1223 ****************************************************************/ 1224 static void kaweth_disconnect(struct usb_interface *intf) 1225 { 1226 struct kaweth_device *kaweth = usb_get_intfdata(intf); 1227 struct net_device *netdev; 1228 1229 dev_info(&intf->dev, "Unregistering\n"); 1230 1231 usb_set_intfdata(intf, NULL); 1232 if (!kaweth) { 1233 dev_warn(&intf->dev, "unregistering non-existant device\n"); 1234 return; 1235 } 1236 netdev = kaweth->net; 1237 1238 dbg("Unregistering net device"); 1239 unregister_netdev(netdev); 1240 1241 usb_free_urb(kaweth->rx_urb); 1242 usb_free_urb(kaweth->tx_urb); 1243 usb_free_urb(kaweth->irq_urb); 1244 1245 usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle); 1246 usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle); 1247 1248 free_netdev(netdev); 1249 } 1250 1251 1252 // FIXME this completion stuff is a modified clone of 1253 // an OLD version of some stuff in usb.c ... 1254 struct usb_api_data { 1255 wait_queue_head_t wqh; 1256 int done; 1257 }; 1258 1259 /*-------------------------------------------------------------------* 1260 * completion handler for compatibility wrappers (sync control/bulk) * 1261 *-------------------------------------------------------------------*/ 1262 static void usb_api_blocking_completion(struct urb *urb) 1263 { 1264 struct usb_api_data *awd = (struct usb_api_data *)urb->context; 1265 1266 awd->done=1; 1267 wake_up(&awd->wqh); 1268 } 1269 1270 /*-------------------------------------------------------------------* 1271 * COMPATIBILITY STUFF * 1272 *-------------------------------------------------------------------*/ 1273 1274 // Starts urb and waits for completion or timeout 1275 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length) 1276 { 1277 struct usb_api_data awd; 1278 int status; 1279 1280 init_waitqueue_head(&awd.wqh); 1281 awd.done = 0; 1282 1283 urb->context = &awd; 1284 status = usb_submit_urb(urb, GFP_NOIO); 1285 if (status) { 1286 // something went wrong 1287 usb_free_urb(urb); 1288 return status; 1289 } 1290 1291 if (!wait_event_timeout(awd.wqh, awd.done, timeout)) { 1292 // timeout 1293 dev_warn(&urb->dev->dev, "usb_control/bulk_msg: timeout\n"); 1294 usb_kill_urb(urb); // remove urb safely 1295 status = -ETIMEDOUT; 1296 } 1297 else { 1298 status = urb->status; 1299 } 1300 1301 if (actual_length) { 1302 *actual_length = urb->actual_length; 1303 } 1304 1305 usb_free_urb(urb); 1306 return status; 1307 } 1308 1309 /*-------------------------------------------------------------------*/ 1310 // returns status (negative) or length (positive) 1311 static int kaweth_internal_control_msg(struct usb_device *usb_dev, 1312 unsigned int pipe, 1313 struct usb_ctrlrequest *cmd, void *data, 1314 int len, int timeout) 1315 { 1316 struct urb *urb; 1317 int retv; 1318 int length = 0; /* shut up GCC */ 1319 1320 urb = usb_alloc_urb(0, GFP_NOIO); 1321 if (!urb) 1322 return -ENOMEM; 1323 1324 usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data, 1325 len, usb_api_blocking_completion, NULL); 1326 1327 retv = usb_start_wait_urb(urb, timeout, &length); 1328 if (retv < 0) { 1329 return retv; 1330 } 1331 else { 1332 return length; 1333 } 1334 } 1335 1336 1337 /**************************************************************** 1338 * kaweth_init 1339 ****************************************************************/ 1340 static int __init kaweth_init(void) 1341 { 1342 dbg("Driver loading"); 1343 return usb_register(&kaweth_driver); 1344 } 1345 1346 /**************************************************************** 1347 * kaweth_exit 1348 ****************************************************************/ 1349 static void __exit kaweth_exit(void) 1350 { 1351 usb_deregister(&kaweth_driver); 1352 } 1353 1354 module_init(kaweth_init); 1355 module_exit(kaweth_exit); 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365