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 = kaweth_control(kaweth, 475 usb_sndctrlpipe(kaweth->dev, 0), 476 USB_REQ_SET_CONFIGURATION, 477 0, 478 kaweth->dev->config[0].desc.bConfigurationValue, 479 0, 480 NULL, 481 0, 482 KAWETH_CONTROL_TIMEOUT); 483 484 mdelay(10); 485 486 dbg("kaweth_reset() returns %d.",result); 487 488 return result; 489 } 490 491 static void kaweth_usb_receive(struct urb *); 492 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t); 493 494 /**************************************************************** 495 int_callback 496 *****************************************************************/ 497 498 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf) 499 { 500 int status; 501 502 status = usb_submit_urb (kaweth->irq_urb, mf); 503 if (unlikely(status == -ENOMEM)) { 504 kaweth->suspend_lowmem_ctrl = 1; 505 schedule_delayed_work(&kaweth->lowmem_work, HZ/4); 506 } else { 507 kaweth->suspend_lowmem_ctrl = 0; 508 } 509 510 if (status) 511 err ("can't resubmit intr, %s-%s, status %d", 512 kaweth->dev->bus->bus_name, 513 kaweth->dev->devpath, status); 514 } 515 516 static void int_callback(struct urb *u) 517 { 518 struct kaweth_device *kaweth = u->context; 519 int act_state; 520 int status = u->status; 521 522 switch (status) { 523 case 0: /* success */ 524 break; 525 case -ECONNRESET: /* unlink */ 526 case -ENOENT: 527 case -ESHUTDOWN: 528 return; 529 /* -EPIPE: should clear the halt */ 530 default: /* error */ 531 goto resubmit; 532 } 533 534 /* we check the link state to report changes */ 535 if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) { 536 if (act_state) 537 netif_carrier_on(kaweth->net); 538 else 539 netif_carrier_off(kaweth->net); 540 541 kaweth->linkstate = act_state; 542 } 543 resubmit: 544 kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC); 545 } 546 547 static void kaweth_resubmit_tl(struct work_struct *work) 548 { 549 struct kaweth_device *kaweth = 550 container_of(work, struct kaweth_device, lowmem_work.work); 551 552 if (IS_BLOCKED(kaweth->status)) 553 return; 554 555 if (kaweth->suspend_lowmem_rx) 556 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO); 557 558 if (kaweth->suspend_lowmem_ctrl) 559 kaweth_resubmit_int_urb(kaweth, GFP_NOIO); 560 } 561 562 563 /**************************************************************** 564 * kaweth_resubmit_rx_urb 565 ****************************************************************/ 566 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth, 567 gfp_t mem_flags) 568 { 569 int result; 570 571 usb_fill_bulk_urb(kaweth->rx_urb, 572 kaweth->dev, 573 usb_rcvbulkpipe(kaweth->dev, 1), 574 kaweth->rx_buf, 575 KAWETH_BUF_SIZE, 576 kaweth_usb_receive, 577 kaweth); 578 kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 579 kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle; 580 581 if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) { 582 if (result == -ENOMEM) { 583 kaweth->suspend_lowmem_rx = 1; 584 schedule_delayed_work(&kaweth->lowmem_work, HZ/4); 585 } 586 err("resubmitting rx_urb %d failed", result); 587 } else { 588 kaweth->suspend_lowmem_rx = 0; 589 } 590 591 return result; 592 } 593 594 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth); 595 596 /**************************************************************** 597 * kaweth_usb_receive 598 ****************************************************************/ 599 static void kaweth_usb_receive(struct urb *urb) 600 { 601 struct kaweth_device *kaweth = urb->context; 602 struct net_device *net = kaweth->net; 603 int status = urb->status; 604 605 int count = urb->actual_length; 606 int count2 = urb->transfer_buffer_length; 607 608 __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf); 609 610 struct sk_buff *skb; 611 612 if (unlikely(status == -EPIPE)) { 613 kaweth->stats.rx_errors++; 614 kaweth->end = 1; 615 wake_up(&kaweth->term_wait); 616 dbg("Status was -EPIPE."); 617 return; 618 } 619 if (unlikely(status == -ECONNRESET || status == -ESHUTDOWN)) { 620 /* we are killed - set a flag and wake the disconnect handler */ 621 kaweth->end = 1; 622 wake_up(&kaweth->term_wait); 623 dbg("Status was -ECONNRESET or -ESHUTDOWN."); 624 return; 625 } 626 if (unlikely(status == -EPROTO || status == -ETIME || 627 status == -EILSEQ)) { 628 kaweth->stats.rx_errors++; 629 dbg("Status was -EPROTO, -ETIME, or -EILSEQ."); 630 return; 631 } 632 if (unlikely(status == -EOVERFLOW)) { 633 kaweth->stats.rx_errors++; 634 dbg("Status was -EOVERFLOW."); 635 } 636 spin_lock(&kaweth->device_lock); 637 if (IS_BLOCKED(kaweth->status)) { 638 spin_unlock(&kaweth->device_lock); 639 return; 640 } 641 spin_unlock(&kaweth->device_lock); 642 643 if(status && status != -EREMOTEIO && count != 1) { 644 err("%s RX status: %d count: %d packet_len: %d", 645 net->name, 646 status, 647 count, 648 (int)pkt_len); 649 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 650 return; 651 } 652 653 if(kaweth->net && (count > 2)) { 654 if(pkt_len > (count - 2)) { 655 err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count); 656 err("Packet len & 2047: %x", pkt_len & 2047); 657 err("Count 2: %x", count2); 658 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 659 return; 660 } 661 662 if(!(skb = dev_alloc_skb(pkt_len+2))) { 663 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 664 return; 665 } 666 667 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */ 668 669 skb_copy_to_linear_data(skb, kaweth->rx_buf + 2, pkt_len); 670 671 skb_put(skb, pkt_len); 672 673 skb->protocol = eth_type_trans(skb, net); 674 675 netif_rx(skb); 676 677 kaweth->stats.rx_packets++; 678 kaweth->stats.rx_bytes += pkt_len; 679 } 680 681 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 682 } 683 684 /**************************************************************** 685 * kaweth_open 686 ****************************************************************/ 687 static int kaweth_open(struct net_device *net) 688 { 689 struct kaweth_device *kaweth = netdev_priv(net); 690 int res; 691 692 dbg("Opening network device."); 693 694 res = usb_autopm_get_interface(kaweth->intf); 695 if (res) { 696 err("Interface cannot be resumed."); 697 return -EIO; 698 } 699 res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL); 700 if (res) 701 goto err_out; 702 703 usb_fill_int_urb( 704 kaweth->irq_urb, 705 kaweth->dev, 706 usb_rcvintpipe(kaweth->dev, 3), 707 kaweth->intbuffer, 708 INTBUFFERSIZE, 709 int_callback, 710 kaweth, 711 250); /* overriding the descriptor */ 712 kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle; 713 kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 714 715 res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL); 716 if (res) { 717 usb_kill_urb(kaweth->rx_urb); 718 goto err_out; 719 } 720 kaweth->opened = 1; 721 722 netif_start_queue(net); 723 724 kaweth_async_set_rx_mode(kaweth); 725 return 0; 726 727 err_out: 728 usb_autopm_enable(kaweth->intf); 729 return -EIO; 730 } 731 732 /**************************************************************** 733 * kaweth_kill_urbs 734 ****************************************************************/ 735 static void kaweth_kill_urbs(struct kaweth_device *kaweth) 736 { 737 usb_kill_urb(kaweth->irq_urb); 738 usb_kill_urb(kaweth->rx_urb); 739 usb_kill_urb(kaweth->tx_urb); 740 741 cancel_delayed_work_sync(&kaweth->lowmem_work); 742 743 /* a scheduled work may have resubmitted, 744 we hit them again */ 745 usb_kill_urb(kaweth->irq_urb); 746 usb_kill_urb(kaweth->rx_urb); 747 } 748 749 /**************************************************************** 750 * kaweth_close 751 ****************************************************************/ 752 static int kaweth_close(struct net_device *net) 753 { 754 struct kaweth_device *kaweth = netdev_priv(net); 755 756 netif_stop_queue(net); 757 kaweth->opened = 0; 758 759 kaweth->status |= KAWETH_STATUS_CLOSING; 760 761 kaweth_kill_urbs(kaweth); 762 763 kaweth->status &= ~KAWETH_STATUS_CLOSING; 764 765 usb_autopm_enable(kaweth->intf); 766 767 return 0; 768 } 769 770 static void kaweth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) 771 { 772 struct kaweth_device *kaweth = netdev_priv(dev); 773 774 strlcpy(info->driver, driver_name, sizeof(info->driver)); 775 usb_make_path(kaweth->dev, info->bus_info, sizeof (info->bus_info)); 776 } 777 778 static u32 kaweth_get_link(struct net_device *dev) 779 { 780 struct kaweth_device *kaweth = netdev_priv(dev); 781 782 return kaweth->linkstate; 783 } 784 785 static const struct ethtool_ops ops = { 786 .get_drvinfo = kaweth_get_drvinfo, 787 .get_link = kaweth_get_link 788 }; 789 790 /**************************************************************** 791 * kaweth_usb_transmit_complete 792 ****************************************************************/ 793 static void kaweth_usb_transmit_complete(struct urb *urb) 794 { 795 struct kaweth_device *kaweth = urb->context; 796 struct sk_buff *skb = kaweth->tx_skb; 797 int status = urb->status; 798 799 if (unlikely(status != 0)) 800 if (status != -ENOENT) 801 dbg("%s: TX status %d.", kaweth->net->name, status); 802 803 netif_wake_queue(kaweth->net); 804 dev_kfree_skb_irq(skb); 805 } 806 807 /**************************************************************** 808 * kaweth_start_xmit 809 ****************************************************************/ 810 static netdev_tx_t kaweth_start_xmit(struct sk_buff *skb, 811 struct net_device *net) 812 { 813 struct kaweth_device *kaweth = netdev_priv(net); 814 __le16 *private_header; 815 816 int res; 817 818 spin_lock_irq(&kaweth->device_lock); 819 820 kaweth_async_set_rx_mode(kaweth); 821 netif_stop_queue(net); 822 if (IS_BLOCKED(kaweth->status)) { 823 goto skip; 824 } 825 826 /* We now decide whether we can put our special header into the sk_buff */ 827 if (skb_cloned(skb) || skb_headroom(skb) < 2) { 828 /* no such luck - we make our own */ 829 struct sk_buff *copied_skb; 830 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC); 831 dev_kfree_skb_irq(skb); 832 skb = copied_skb; 833 if (!copied_skb) { 834 kaweth->stats.tx_errors++; 835 netif_start_queue(net); 836 spin_unlock_irq(&kaweth->device_lock); 837 return NETDEV_TX_OK; 838 } 839 } 840 841 private_header = (__le16 *)__skb_push(skb, 2); 842 *private_header = cpu_to_le16(skb->len-2); 843 kaweth->tx_skb = skb; 844 845 usb_fill_bulk_urb(kaweth->tx_urb, 846 kaweth->dev, 847 usb_sndbulkpipe(kaweth->dev, 2), 848 private_header, 849 skb->len, 850 kaweth_usb_transmit_complete, 851 kaweth); 852 kaweth->end = 0; 853 854 if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC))) 855 { 856 dev_warn(&net->dev, "kaweth failed tx_urb %d\n", res); 857 skip: 858 kaweth->stats.tx_errors++; 859 860 netif_start_queue(net); 861 dev_kfree_skb_irq(skb); 862 } 863 else 864 { 865 kaweth->stats.tx_packets++; 866 kaweth->stats.tx_bytes += skb->len; 867 net->trans_start = jiffies; 868 } 869 870 spin_unlock_irq(&kaweth->device_lock); 871 872 return NETDEV_TX_OK; 873 } 874 875 /**************************************************************** 876 * kaweth_set_rx_mode 877 ****************************************************************/ 878 static void kaweth_set_rx_mode(struct net_device *net) 879 { 880 struct kaweth_device *kaweth = netdev_priv(net); 881 882 __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED | 883 KAWETH_PACKET_FILTER_BROADCAST | 884 KAWETH_PACKET_FILTER_MULTICAST; 885 886 dbg("Setting Rx mode to %d", packet_filter_bitmap); 887 888 netif_stop_queue(net); 889 890 if (net->flags & IFF_PROMISC) { 891 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS; 892 } 893 else if ((net->mc_count) || (net->flags & IFF_ALLMULTI)) { 894 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST; 895 } 896 897 kaweth->packet_filter_bitmap = packet_filter_bitmap; 898 netif_wake_queue(net); 899 } 900 901 /**************************************************************** 902 * kaweth_async_set_rx_mode 903 ****************************************************************/ 904 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth) 905 { 906 int result; 907 __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap; 908 909 kaweth->packet_filter_bitmap = 0; 910 if (packet_filter_bitmap == 0) 911 return; 912 913 if (in_interrupt()) 914 return; 915 916 result = kaweth_control(kaweth, 917 usb_sndctrlpipe(kaweth->dev, 0), 918 KAWETH_COMMAND_SET_PACKET_FILTER, 919 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 920 packet_filter_bitmap, 921 0, 922 (void *)&kaweth->scratch, 923 0, 924 KAWETH_CONTROL_TIMEOUT); 925 926 if(result < 0) { 927 err("Failed to set Rx mode: %d", result); 928 } 929 else { 930 dbg("Set Rx mode to %d", packet_filter_bitmap); 931 } 932 } 933 934 /**************************************************************** 935 * kaweth_netdev_stats 936 ****************************************************************/ 937 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev) 938 { 939 struct kaweth_device *kaweth = netdev_priv(dev); 940 return &kaweth->stats; 941 } 942 943 /**************************************************************** 944 * kaweth_tx_timeout 945 ****************************************************************/ 946 static void kaweth_tx_timeout(struct net_device *net) 947 { 948 struct kaweth_device *kaweth = netdev_priv(net); 949 950 dev_warn(&net->dev, "%s: Tx timed out. Resetting.\n", net->name); 951 kaweth->stats.tx_errors++; 952 net->trans_start = jiffies; 953 954 usb_unlink_urb(kaweth->tx_urb); 955 } 956 957 /**************************************************************** 958 * kaweth_suspend 959 ****************************************************************/ 960 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message) 961 { 962 struct kaweth_device *kaweth = usb_get_intfdata(intf); 963 unsigned long flags; 964 965 dbg("Suspending device"); 966 spin_lock_irqsave(&kaweth->device_lock, flags); 967 kaweth->status |= KAWETH_STATUS_SUSPENDING; 968 spin_unlock_irqrestore(&kaweth->device_lock, flags); 969 970 kaweth_kill_urbs(kaweth); 971 return 0; 972 } 973 974 /**************************************************************** 975 * kaweth_resume 976 ****************************************************************/ 977 static int kaweth_resume(struct usb_interface *intf) 978 { 979 struct kaweth_device *kaweth = usb_get_intfdata(intf); 980 unsigned long flags; 981 982 dbg("Resuming device"); 983 spin_lock_irqsave(&kaweth->device_lock, flags); 984 kaweth->status &= ~KAWETH_STATUS_SUSPENDING; 985 spin_unlock_irqrestore(&kaweth->device_lock, flags); 986 987 if (!kaweth->opened) 988 return 0; 989 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO); 990 kaweth_resubmit_int_urb(kaweth, GFP_NOIO); 991 992 return 0; 993 } 994 995 /**************************************************************** 996 * kaweth_probe 997 ****************************************************************/ 998 999 1000 static const struct net_device_ops kaweth_netdev_ops = { 1001 .ndo_open = kaweth_open, 1002 .ndo_stop = kaweth_close, 1003 .ndo_start_xmit = kaweth_start_xmit, 1004 .ndo_tx_timeout = kaweth_tx_timeout, 1005 .ndo_set_multicast_list = kaweth_set_rx_mode, 1006 .ndo_get_stats = kaweth_netdev_stats, 1007 .ndo_change_mtu = eth_change_mtu, 1008 .ndo_set_mac_address = eth_mac_addr, 1009 .ndo_validate_addr = eth_validate_addr, 1010 }; 1011 1012 static int kaweth_probe( 1013 struct usb_interface *intf, 1014 const struct usb_device_id *id /* from id_table */ 1015 ) 1016 { 1017 struct usb_device *dev = interface_to_usbdev(intf); 1018 struct kaweth_device *kaweth; 1019 struct net_device *netdev; 1020 const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; 1021 int result = 0; 1022 1023 dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x", 1024 dev->devnum, 1025 le16_to_cpu(dev->descriptor.idVendor), 1026 le16_to_cpu(dev->descriptor.idProduct), 1027 le16_to_cpu(dev->descriptor.bcdDevice)); 1028 1029 dbg("Device at %p", dev); 1030 1031 dbg("Descriptor length: %x type: %x", 1032 (int)dev->descriptor.bLength, 1033 (int)dev->descriptor.bDescriptorType); 1034 1035 netdev = alloc_etherdev(sizeof(*kaweth)); 1036 if (!netdev) 1037 return -ENOMEM; 1038 1039 kaweth = netdev_priv(netdev); 1040 kaweth->dev = dev; 1041 kaweth->net = netdev; 1042 1043 spin_lock_init(&kaweth->device_lock); 1044 init_waitqueue_head(&kaweth->term_wait); 1045 1046 dbg("Resetting."); 1047 1048 kaweth_reset(kaweth); 1049 1050 /* 1051 * If high byte of bcdDevice is nonzero, firmware is already 1052 * downloaded. Don't try to do it again, or we'll hang the device. 1053 */ 1054 1055 if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) { 1056 dev_info(&intf->dev, "Firmware present in device.\n"); 1057 } else { 1058 /* Download the firmware */ 1059 dev_info(&intf->dev, "Downloading firmware...\n"); 1060 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL); 1061 if ((result = kaweth_download_firmware(kaweth, 1062 "kaweth/new_code.bin", 1063 100, 1064 2)) < 0) { 1065 err("Error downloading firmware (%d)", result); 1066 goto err_fw; 1067 } 1068 1069 if ((result = kaweth_download_firmware(kaweth, 1070 "kaweth/new_code_fix.bin", 1071 100, 1072 3)) < 0) { 1073 err("Error downloading firmware fix (%d)", result); 1074 goto err_fw; 1075 } 1076 1077 if ((result = kaweth_download_firmware(kaweth, 1078 "kaweth/trigger_code.bin", 1079 126, 1080 2)) < 0) { 1081 err("Error downloading trigger code (%d)", result); 1082 goto err_fw; 1083 1084 } 1085 1086 if ((result = kaweth_download_firmware(kaweth, 1087 "kaweth/trigger_code_fix.bin", 1088 126, 1089 3)) < 0) { 1090 err("Error downloading trigger code fix (%d)", result); 1091 goto err_fw; 1092 } 1093 1094 1095 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) { 1096 err("Error triggering firmware (%d)", result); 1097 goto err_fw; 1098 } 1099 1100 /* Device will now disappear for a moment... */ 1101 dev_info(&intf->dev, "Firmware loaded. I'll be back...\n"); 1102 err_fw: 1103 free_page((unsigned long)kaweth->firmware_buf); 1104 free_netdev(netdev); 1105 return -EIO; 1106 } 1107 1108 result = kaweth_read_configuration(kaweth); 1109 1110 if(result < 0) { 1111 err("Error reading configuration (%d), no net device created", result); 1112 goto err_free_netdev; 1113 } 1114 1115 dev_info(&intf->dev, "Statistics collection: %x\n", kaweth->configuration.statistics_mask); 1116 dev_info(&intf->dev, "Multicast filter limit: %x\n", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1)); 1117 dev_info(&intf->dev, "MTU: %d\n", le16_to_cpu(kaweth->configuration.segment_size)); 1118 dev_info(&intf->dev, "Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n", 1119 (int)kaweth->configuration.hw_addr[0], 1120 (int)kaweth->configuration.hw_addr[1], 1121 (int)kaweth->configuration.hw_addr[2], 1122 (int)kaweth->configuration.hw_addr[3], 1123 (int)kaweth->configuration.hw_addr[4], 1124 (int)kaweth->configuration.hw_addr[5]); 1125 1126 if(!memcmp(&kaweth->configuration.hw_addr, 1127 &bcast_addr, 1128 sizeof(bcast_addr))) { 1129 err("Firmware not functioning properly, no net device created"); 1130 goto err_free_netdev; 1131 } 1132 1133 if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) { 1134 dbg("Error setting URB size"); 1135 goto err_free_netdev; 1136 } 1137 1138 if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) { 1139 err("Error setting SOFS wait"); 1140 goto err_free_netdev; 1141 } 1142 1143 result = kaweth_set_receive_filter(kaweth, 1144 KAWETH_PACKET_FILTER_DIRECTED | 1145 KAWETH_PACKET_FILTER_BROADCAST | 1146 KAWETH_PACKET_FILTER_MULTICAST); 1147 1148 if(result < 0) { 1149 err("Error setting receive filter"); 1150 goto err_free_netdev; 1151 } 1152 1153 dbg("Initializing net device."); 1154 1155 kaweth->intf = intf; 1156 1157 kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 1158 if (!kaweth->tx_urb) 1159 goto err_free_netdev; 1160 kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL); 1161 if (!kaweth->rx_urb) 1162 goto err_only_tx; 1163 kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL); 1164 if (!kaweth->irq_urb) 1165 goto err_tx_and_rx; 1166 1167 kaweth->intbuffer = usb_buffer_alloc( kaweth->dev, 1168 INTBUFFERSIZE, 1169 GFP_KERNEL, 1170 &kaweth->intbufferhandle); 1171 if (!kaweth->intbuffer) 1172 goto err_tx_and_rx_and_irq; 1173 kaweth->rx_buf = usb_buffer_alloc( kaweth->dev, 1174 KAWETH_BUF_SIZE, 1175 GFP_KERNEL, 1176 &kaweth->rxbufferhandle); 1177 if (!kaweth->rx_buf) 1178 goto err_all_but_rxbuf; 1179 1180 memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr)); 1181 memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr, 1182 sizeof(kaweth->configuration.hw_addr)); 1183 1184 netdev->netdev_ops = &kaweth_netdev_ops; 1185 netdev->watchdog_timeo = KAWETH_TX_TIMEOUT; 1186 netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size); 1187 SET_ETHTOOL_OPS(netdev, &ops); 1188 1189 /* kaweth is zeroed as part of alloc_netdev */ 1190 INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl); 1191 usb_set_intfdata(intf, kaweth); 1192 1193 #if 0 1194 // dma_supported() is deeply broken on almost all architectures 1195 if (dma_supported (&intf->dev, 0xffffffffffffffffULL)) 1196 kaweth->net->features |= NETIF_F_HIGHDMA; 1197 #endif 1198 1199 SET_NETDEV_DEV(netdev, &intf->dev); 1200 if (register_netdev(netdev) != 0) { 1201 err("Error registering netdev."); 1202 goto err_intfdata; 1203 } 1204 1205 dev_info(&intf->dev, "kaweth interface created at %s\n", 1206 kaweth->net->name); 1207 1208 dbg("Kaweth probe returning."); 1209 1210 return 0; 1211 1212 err_intfdata: 1213 usb_set_intfdata(intf, NULL); 1214 usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle); 1215 err_all_but_rxbuf: 1216 usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle); 1217 err_tx_and_rx_and_irq: 1218 usb_free_urb(kaweth->irq_urb); 1219 err_tx_and_rx: 1220 usb_free_urb(kaweth->rx_urb); 1221 err_only_tx: 1222 usb_free_urb(kaweth->tx_urb); 1223 err_free_netdev: 1224 free_netdev(netdev); 1225 1226 return -EIO; 1227 } 1228 1229 /**************************************************************** 1230 * kaweth_disconnect 1231 ****************************************************************/ 1232 static void kaweth_disconnect(struct usb_interface *intf) 1233 { 1234 struct kaweth_device *kaweth = usb_get_intfdata(intf); 1235 struct net_device *netdev; 1236 1237 dev_info(&intf->dev, "Unregistering\n"); 1238 1239 usb_set_intfdata(intf, NULL); 1240 if (!kaweth) { 1241 dev_warn(&intf->dev, "unregistering non-existant device\n"); 1242 return; 1243 } 1244 netdev = kaweth->net; 1245 1246 dbg("Unregistering net device"); 1247 unregister_netdev(netdev); 1248 1249 usb_free_urb(kaweth->rx_urb); 1250 usb_free_urb(kaweth->tx_urb); 1251 usb_free_urb(kaweth->irq_urb); 1252 1253 usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle); 1254 usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle); 1255 1256 free_netdev(netdev); 1257 } 1258 1259 1260 // FIXME this completion stuff is a modified clone of 1261 // an OLD version of some stuff in usb.c ... 1262 struct usb_api_data { 1263 wait_queue_head_t wqh; 1264 int done; 1265 }; 1266 1267 /*-------------------------------------------------------------------* 1268 * completion handler for compatibility wrappers (sync control/bulk) * 1269 *-------------------------------------------------------------------*/ 1270 static void usb_api_blocking_completion(struct urb *urb) 1271 { 1272 struct usb_api_data *awd = (struct usb_api_data *)urb->context; 1273 1274 awd->done=1; 1275 wake_up(&awd->wqh); 1276 } 1277 1278 /*-------------------------------------------------------------------* 1279 * COMPATIBILITY STUFF * 1280 *-------------------------------------------------------------------*/ 1281 1282 // Starts urb and waits for completion or timeout 1283 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length) 1284 { 1285 struct usb_api_data awd; 1286 int status; 1287 1288 init_waitqueue_head(&awd.wqh); 1289 awd.done = 0; 1290 1291 urb->context = &awd; 1292 status = usb_submit_urb(urb, GFP_NOIO); 1293 if (status) { 1294 // something went wrong 1295 usb_free_urb(urb); 1296 return status; 1297 } 1298 1299 if (!wait_event_timeout(awd.wqh, awd.done, timeout)) { 1300 // timeout 1301 dev_warn(&urb->dev->dev, "usb_control/bulk_msg: timeout\n"); 1302 usb_kill_urb(urb); // remove urb safely 1303 status = -ETIMEDOUT; 1304 } 1305 else { 1306 status = urb->status; 1307 } 1308 1309 if (actual_length) { 1310 *actual_length = urb->actual_length; 1311 } 1312 1313 usb_free_urb(urb); 1314 return status; 1315 } 1316 1317 /*-------------------------------------------------------------------*/ 1318 // returns status (negative) or length (positive) 1319 static int kaweth_internal_control_msg(struct usb_device *usb_dev, 1320 unsigned int pipe, 1321 struct usb_ctrlrequest *cmd, void *data, 1322 int len, int timeout) 1323 { 1324 struct urb *urb; 1325 int retv; 1326 int length = 0; /* shut up GCC */ 1327 1328 urb = usb_alloc_urb(0, GFP_NOIO); 1329 if (!urb) 1330 return -ENOMEM; 1331 1332 usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data, 1333 len, usb_api_blocking_completion, NULL); 1334 1335 retv = usb_start_wait_urb(urb, timeout, &length); 1336 if (retv < 0) { 1337 return retv; 1338 } 1339 else { 1340 return length; 1341 } 1342 } 1343 1344 1345 /**************************************************************** 1346 * kaweth_init 1347 ****************************************************************/ 1348 static int __init kaweth_init(void) 1349 { 1350 dbg("Driver loading"); 1351 return usb_register(&kaweth_driver); 1352 } 1353 1354 /**************************************************************** 1355 * kaweth_exit 1356 ****************************************************************/ 1357 static void __exit kaweth_exit(void) 1358 { 1359 usb_deregister(&kaweth_driver); 1360 } 1361 1362 module_init(kaweth_init); 1363 module_exit(kaweth_exit); 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373