1 /**************************************************************** 2 * 3 * kaweth.c - driver for KL5KUSB101 based USB->Ethernet 4 * 5 * (c) 2000 Interlan Communications 6 * (c) 2000 Stephane Alnet 7 * (C) 2001 Brad Hards 8 * (C) 2002 Oliver Neukum 9 * 10 * Original author: The Zapman <zapman@interlan.net> 11 * Inspired by, and much credit goes to Michael Rothwell 12 * <rothwell@interlan.net> for the test equipment, help, and patience 13 * Based off of (and with thanks to) Petko Manolov's pegaus.c driver. 14 * Also many thanks to Joel Silverman and Ed Surprenant at Kawasaki 15 * for providing the firmware and driver resources. 16 * 17 * This program is free software; you can redistribute it and/or 18 * modify it under the terms of the GNU General Public License as 19 * published by the Free Software Foundation; either version 2, or 20 * (at your option) any later version. 21 * 22 * This program is distributed in the hope that it will be useful, 23 * but WITHOUT ANY WARRANTY; without even the implied warranty of 24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 25 * GNU General Public License for more details. 26 * 27 * You should have received a copy of the GNU General Public License 28 * along with this program; if not, see <http://www.gnu.org/licenses/>. 29 * 30 ****************************************************************/ 31 32 /* TODO: 33 * Develop test procedures for USB net interfaces 34 * Run test procedures 35 * Fix bugs from previous two steps 36 * Snoop other OSs for any tricks we're not doing 37 * Reduce arbitrary timeouts 38 * Smart multicast support 39 * Temporary MAC change support 40 * Tunable SOFs parameter - ioctl()? 41 * Ethernet stats collection 42 * Code formatting improvements 43 */ 44 45 #include <linux/module.h> 46 #include <linux/slab.h> 47 #include <linux/string.h> 48 #include <linux/init.h> 49 #include <linux/delay.h> 50 #include <linux/netdevice.h> 51 #include <linux/etherdevice.h> 52 #include <linux/usb.h> 53 #include <linux/types.h> 54 #include <linux/ethtool.h> 55 #include <linux/dma-mapping.h> 56 #include <linux/wait.h> 57 #include <linux/firmware.h> 58 #include <asm/uaccess.h> 59 #include <asm/byteorder.h> 60 61 #undef DEBUG 62 63 #define KAWETH_MTU 1514 64 #define KAWETH_BUF_SIZE 1664 65 #define KAWETH_TX_TIMEOUT (5 * HZ) 66 #define KAWETH_SCRATCH_SIZE 32 67 #define KAWETH_FIRMWARE_BUF_SIZE 4096 68 #define KAWETH_CONTROL_TIMEOUT (30000) 69 70 #define KAWETH_STATUS_BROKEN 0x0000001 71 #define KAWETH_STATUS_CLOSING 0x0000002 72 #define KAWETH_STATUS_SUSPENDING 0x0000004 73 74 #define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING) 75 76 #define KAWETH_PACKET_FILTER_PROMISCUOUS 0x01 77 #define KAWETH_PACKET_FILTER_ALL_MULTICAST 0x02 78 #define KAWETH_PACKET_FILTER_DIRECTED 0x04 79 #define KAWETH_PACKET_FILTER_BROADCAST 0x08 80 #define KAWETH_PACKET_FILTER_MULTICAST 0x10 81 82 /* Table 7 */ 83 #define KAWETH_COMMAND_GET_ETHERNET_DESC 0x00 84 #define KAWETH_COMMAND_MULTICAST_FILTERS 0x01 85 #define KAWETH_COMMAND_SET_PACKET_FILTER 0x02 86 #define KAWETH_COMMAND_STATISTICS 0x03 87 #define KAWETH_COMMAND_SET_TEMP_MAC 0x06 88 #define KAWETH_COMMAND_GET_TEMP_MAC 0x07 89 #define KAWETH_COMMAND_SET_URB_SIZE 0x08 90 #define KAWETH_COMMAND_SET_SOFS_WAIT 0x09 91 #define KAWETH_COMMAND_SCAN 0xFF 92 93 #define KAWETH_SOFS_TO_WAIT 0x05 94 95 #define INTBUFFERSIZE 4 96 97 #define STATE_OFFSET 0 98 #define STATE_MASK 0x40 99 #define STATE_SHIFT 5 100 101 #define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED) 102 103 104 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>"); 105 MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver"); 106 MODULE_LICENSE("GPL"); 107 MODULE_FIRMWARE("kaweth/new_code.bin"); 108 MODULE_FIRMWARE("kaweth/new_code_fix.bin"); 109 MODULE_FIRMWARE("kaweth/trigger_code.bin"); 110 MODULE_FIRMWARE("kaweth/trigger_code_fix.bin"); 111 112 static const char driver_name[] = "kaweth"; 113 114 static int kaweth_probe( 115 struct usb_interface *intf, 116 const struct usb_device_id *id /* from id_table */ 117 ); 118 static void kaweth_disconnect(struct usb_interface *intf); 119 static int kaweth_internal_control_msg(struct usb_device *usb_dev, 120 unsigned int pipe, 121 struct usb_ctrlrequest *cmd, void *data, 122 int len, int timeout); 123 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message); 124 static int kaweth_resume(struct usb_interface *intf); 125 126 /**************************************************************** 127 * usb_device_id 128 ****************************************************************/ 129 static struct usb_device_id usb_klsi_table[] = { 130 { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */ 131 { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */ 132 { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */ 133 { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */ 134 { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */ 135 { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */ 136 { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */ 137 { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */ 138 { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */ 139 { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */ 140 { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */ 141 { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */ 142 { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */ 143 { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */ 144 { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */ 145 { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */ 146 { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */ 147 { USB_DEVICE(0x07c9, 0xb010) }, /* Allied Telesyn AT-USB10 USB Ethernet Adapter */ 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 .disable_hub_initiated_lpm = 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 } __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 netdev_dbg(kaweth->net, "kaweth_control()\n"); 270 271 if(in_interrupt()) { 272 netdev_dbg(kaweth->net, "in_interrupt()\n"); 273 return -EBUSY; 274 } 275 276 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC); 277 if (!dr) 278 return -ENOMEM; 279 280 dr->bRequestType = requesttype; 281 dr->bRequest = request; 282 dr->wValue = cpu_to_le16(value); 283 dr->wIndex = cpu_to_le16(index); 284 dr->wLength = cpu_to_le16(size); 285 286 retval = kaweth_internal_control_msg(kaweth->dev, 287 pipe, 288 dr, 289 data, 290 size, 291 timeout); 292 293 kfree(dr); 294 return retval; 295 } 296 297 /**************************************************************** 298 * kaweth_read_configuration 299 ****************************************************************/ 300 static int kaweth_read_configuration(struct kaweth_device *kaweth) 301 { 302 int retval; 303 304 netdev_dbg(kaweth->net, "Reading kaweth configuration\n"); 305 306 retval = kaweth_control(kaweth, 307 usb_rcvctrlpipe(kaweth->dev, 0), 308 KAWETH_COMMAND_GET_ETHERNET_DESC, 309 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE, 310 0, 311 0, 312 (void *)&kaweth->configuration, 313 sizeof(kaweth->configuration), 314 KAWETH_CONTROL_TIMEOUT); 315 316 return retval; 317 } 318 319 /**************************************************************** 320 * kaweth_set_urb_size 321 ****************************************************************/ 322 static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size) 323 { 324 int retval; 325 326 netdev_dbg(kaweth->net, "Setting URB size to %d\n", (unsigned)urb_size); 327 328 retval = kaweth_control(kaweth, 329 usb_sndctrlpipe(kaweth->dev, 0), 330 KAWETH_COMMAND_SET_URB_SIZE, 331 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 332 urb_size, 333 0, 334 (void *)&kaweth->scratch, 335 0, 336 KAWETH_CONTROL_TIMEOUT); 337 338 return retval; 339 } 340 341 /**************************************************************** 342 * kaweth_set_sofs_wait 343 ****************************************************************/ 344 static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait) 345 { 346 int retval; 347 348 netdev_dbg(kaweth->net, "Set SOFS wait to %d\n", (unsigned)sofs_wait); 349 350 retval = kaweth_control(kaweth, 351 usb_sndctrlpipe(kaweth->dev, 0), 352 KAWETH_COMMAND_SET_SOFS_WAIT, 353 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 354 sofs_wait, 355 0, 356 (void *)&kaweth->scratch, 357 0, 358 KAWETH_CONTROL_TIMEOUT); 359 360 return retval; 361 } 362 363 /**************************************************************** 364 * kaweth_set_receive_filter 365 ****************************************************************/ 366 static int kaweth_set_receive_filter(struct kaweth_device *kaweth, 367 __u16 receive_filter) 368 { 369 int retval; 370 371 netdev_dbg(kaweth->net, "Set receive filter to %d\n", 372 (unsigned)receive_filter); 373 374 retval = kaweth_control(kaweth, 375 usb_sndctrlpipe(kaweth->dev, 0), 376 KAWETH_COMMAND_SET_PACKET_FILTER, 377 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 378 receive_filter, 379 0, 380 (void *)&kaweth->scratch, 381 0, 382 KAWETH_CONTROL_TIMEOUT); 383 384 return retval; 385 } 386 387 /**************************************************************** 388 * kaweth_download_firmware 389 ****************************************************************/ 390 static int kaweth_download_firmware(struct kaweth_device *kaweth, 391 const char *fwname, 392 __u8 interrupt, 393 __u8 type) 394 { 395 const struct firmware *fw; 396 int data_len; 397 int ret; 398 399 ret = request_firmware(&fw, fwname, &kaweth->dev->dev); 400 if (ret) { 401 dev_err(&kaweth->intf->dev, "Firmware request failed\n"); 402 return ret; 403 } 404 405 if (fw->size > KAWETH_FIRMWARE_BUF_SIZE) { 406 dev_err(&kaweth->intf->dev, "Firmware too big: %zu\n", 407 fw->size); 408 release_firmware(fw); 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 netdev_dbg(kaweth->net, "High: %i, Low:%i\n", kaweth->firmware_buf[3], 422 kaweth->firmware_buf[2]); 423 424 netdev_dbg(kaweth->net, 425 "Downloading firmware at %p to kaweth device at %p\n", 426 kaweth->firmware_buf, kaweth); 427 netdev_dbg(kaweth->net, "Firmware length: %d\n", data_len); 428 429 return kaweth_control(kaweth, 430 usb_sndctrlpipe(kaweth->dev, 0), 431 KAWETH_COMMAND_SCAN, 432 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 433 0, 434 0, 435 (void *)kaweth->firmware_buf, 436 data_len, 437 KAWETH_CONTROL_TIMEOUT); 438 } 439 440 /**************************************************************** 441 * kaweth_trigger_firmware 442 ****************************************************************/ 443 static int kaweth_trigger_firmware(struct kaweth_device *kaweth, 444 __u8 interrupt) 445 { 446 kaweth->firmware_buf[0] = 0xB6; 447 kaweth->firmware_buf[1] = 0xC3; 448 kaweth->firmware_buf[2] = 0x01; 449 kaweth->firmware_buf[3] = 0x00; 450 kaweth->firmware_buf[4] = 0x06; 451 kaweth->firmware_buf[5] = interrupt; 452 kaweth->firmware_buf[6] = 0x00; 453 kaweth->firmware_buf[7] = 0x00; 454 455 netdev_dbg(kaweth->net, "Triggering firmware\n"); 456 457 return kaweth_control(kaweth, 458 usb_sndctrlpipe(kaweth->dev, 0), 459 KAWETH_COMMAND_SCAN, 460 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 461 0, 462 0, 463 (void *)kaweth->firmware_buf, 464 8, 465 KAWETH_CONTROL_TIMEOUT); 466 } 467 468 /**************************************************************** 469 * kaweth_reset 470 ****************************************************************/ 471 static int kaweth_reset(struct kaweth_device *kaweth) 472 { 473 int result; 474 475 netdev_dbg(kaweth->net, "kaweth_reset(%p)\n", kaweth); 476 result = usb_reset_configuration(kaweth->dev); 477 mdelay(10); 478 479 netdev_dbg(kaweth->net, "kaweth_reset() returns %d.\n", result); 480 481 return result; 482 } 483 484 static void kaweth_usb_receive(struct urb *); 485 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t); 486 487 /**************************************************************** 488 int_callback 489 *****************************************************************/ 490 491 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf) 492 { 493 int status; 494 495 status = usb_submit_urb (kaweth->irq_urb, mf); 496 if (unlikely(status == -ENOMEM)) { 497 kaweth->suspend_lowmem_ctrl = 1; 498 schedule_delayed_work(&kaweth->lowmem_work, HZ/4); 499 } else { 500 kaweth->suspend_lowmem_ctrl = 0; 501 } 502 503 if (status) 504 dev_err(&kaweth->intf->dev, 505 "can't resubmit intr, %s-%s, status %d\n", 506 kaweth->dev->bus->bus_name, 507 kaweth->dev->devpath, status); 508 } 509 510 static void int_callback(struct urb *u) 511 { 512 struct kaweth_device *kaweth = u->context; 513 int act_state; 514 int status = u->status; 515 516 switch (status) { 517 case 0: /* success */ 518 break; 519 case -ECONNRESET: /* unlink */ 520 case -ENOENT: 521 case -ESHUTDOWN: 522 return; 523 /* -EPIPE: should clear the halt */ 524 default: /* error */ 525 goto resubmit; 526 } 527 528 /* we check the link state to report changes */ 529 if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) { 530 if (act_state) 531 netif_carrier_on(kaweth->net); 532 else 533 netif_carrier_off(kaweth->net); 534 535 kaweth->linkstate = act_state; 536 } 537 resubmit: 538 kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC); 539 } 540 541 static void kaweth_resubmit_tl(struct work_struct *work) 542 { 543 struct kaweth_device *kaweth = 544 container_of(work, struct kaweth_device, lowmem_work.work); 545 546 if (IS_BLOCKED(kaweth->status)) 547 return; 548 549 if (kaweth->suspend_lowmem_rx) 550 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO); 551 552 if (kaweth->suspend_lowmem_ctrl) 553 kaweth_resubmit_int_urb(kaweth, GFP_NOIO); 554 } 555 556 557 /**************************************************************** 558 * kaweth_resubmit_rx_urb 559 ****************************************************************/ 560 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth, 561 gfp_t mem_flags) 562 { 563 int result; 564 565 usb_fill_bulk_urb(kaweth->rx_urb, 566 kaweth->dev, 567 usb_rcvbulkpipe(kaweth->dev, 1), 568 kaweth->rx_buf, 569 KAWETH_BUF_SIZE, 570 kaweth_usb_receive, 571 kaweth); 572 kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 573 kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle; 574 575 if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) { 576 if (result == -ENOMEM) { 577 kaweth->suspend_lowmem_rx = 1; 578 schedule_delayed_work(&kaweth->lowmem_work, HZ/4); 579 } 580 dev_err(&kaweth->intf->dev, "resubmitting rx_urb %d failed\n", 581 result); 582 } else { 583 kaweth->suspend_lowmem_rx = 0; 584 } 585 586 return result; 587 } 588 589 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth); 590 591 /**************************************************************** 592 * kaweth_usb_receive 593 ****************************************************************/ 594 static void kaweth_usb_receive(struct urb *urb) 595 { 596 struct device *dev = &urb->dev->dev; 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 dev_dbg(dev, "Status was -EPIPE.\n"); 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 dev_dbg(dev, "Status was -ECONNRESET or -ESHUTDOWN.\n"); 620 return; 621 } 622 if (unlikely(status == -EPROTO || status == -ETIME || 623 status == -EILSEQ)) { 624 kaweth->stats.rx_errors++; 625 dev_dbg(dev, "Status was -EPROTO, -ETIME, or -EILSEQ.\n"); 626 return; 627 } 628 if (unlikely(status == -EOVERFLOW)) { 629 kaweth->stats.rx_errors++; 630 dev_dbg(dev, "Status was -EOVERFLOW.\n"); 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 dev_err(&kaweth->intf->dev, 641 "%s RX status: %d count: %d packet_len: %d\n", 642 net->name, status, count, (int)pkt_len); 643 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 644 return; 645 } 646 647 if(kaweth->net && (count > 2)) { 648 if(pkt_len > (count - 2)) { 649 dev_err(&kaweth->intf->dev, 650 "Packet length too long for USB frame (pkt_len: %x, count: %x)\n", 651 pkt_len, count); 652 dev_err(&kaweth->intf->dev, "Packet len & 2047: %x\n", 653 pkt_len & 2047); 654 dev_err(&kaweth->intf->dev, "Count 2: %x\n", count2); 655 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 656 return; 657 } 658 659 if(!(skb = dev_alloc_skb(pkt_len+2))) { 660 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 661 return; 662 } 663 664 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */ 665 666 skb_copy_to_linear_data(skb, kaweth->rx_buf + 2, pkt_len); 667 668 skb_put(skb, pkt_len); 669 670 skb->protocol = eth_type_trans(skb, net); 671 672 netif_rx(skb); 673 674 kaweth->stats.rx_packets++; 675 kaweth->stats.rx_bytes += pkt_len; 676 } 677 678 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 679 } 680 681 /**************************************************************** 682 * kaweth_open 683 ****************************************************************/ 684 static int kaweth_open(struct net_device *net) 685 { 686 struct kaweth_device *kaweth = netdev_priv(net); 687 int res; 688 689 netdev_dbg(kaweth->net, "Opening network device.\n"); 690 691 res = usb_autopm_get_interface(kaweth->intf); 692 if (res) { 693 dev_err(&kaweth->intf->dev, "Interface cannot be resumed.\n"); 694 return -EIO; 695 } 696 res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL); 697 if (res) 698 goto err_out; 699 700 usb_fill_int_urb( 701 kaweth->irq_urb, 702 kaweth->dev, 703 usb_rcvintpipe(kaweth->dev, 3), 704 kaweth->intbuffer, 705 INTBUFFERSIZE, 706 int_callback, 707 kaweth, 708 250); /* overriding the descriptor */ 709 kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle; 710 kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 711 712 res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL); 713 if (res) { 714 usb_kill_urb(kaweth->rx_urb); 715 goto err_out; 716 } 717 kaweth->opened = 1; 718 719 netif_start_queue(net); 720 721 kaweth_async_set_rx_mode(kaweth); 722 return 0; 723 724 err_out: 725 usb_autopm_put_interface(kaweth->intf); 726 return -EIO; 727 } 728 729 /**************************************************************** 730 * kaweth_kill_urbs 731 ****************************************************************/ 732 static void kaweth_kill_urbs(struct kaweth_device *kaweth) 733 { 734 usb_kill_urb(kaweth->irq_urb); 735 usb_kill_urb(kaweth->rx_urb); 736 usb_kill_urb(kaweth->tx_urb); 737 738 cancel_delayed_work_sync(&kaweth->lowmem_work); 739 740 /* a scheduled work may have resubmitted, 741 we hit them again */ 742 usb_kill_urb(kaweth->irq_urb); 743 usb_kill_urb(kaweth->rx_urb); 744 } 745 746 /**************************************************************** 747 * kaweth_close 748 ****************************************************************/ 749 static int kaweth_close(struct net_device *net) 750 { 751 struct kaweth_device *kaweth = netdev_priv(net); 752 753 netif_stop_queue(net); 754 kaweth->opened = 0; 755 756 kaweth->status |= KAWETH_STATUS_CLOSING; 757 758 kaweth_kill_urbs(kaweth); 759 760 kaweth->status &= ~KAWETH_STATUS_CLOSING; 761 762 usb_autopm_put_interface(kaweth->intf); 763 764 return 0; 765 } 766 767 static u32 kaweth_get_link(struct net_device *dev) 768 { 769 struct kaweth_device *kaweth = netdev_priv(dev); 770 771 return kaweth->linkstate; 772 } 773 774 static const struct ethtool_ops ops = { 775 .get_link = kaweth_get_link 776 }; 777 778 /**************************************************************** 779 * kaweth_usb_transmit_complete 780 ****************************************************************/ 781 static void kaweth_usb_transmit_complete(struct urb *urb) 782 { 783 struct kaweth_device *kaweth = urb->context; 784 struct sk_buff *skb = kaweth->tx_skb; 785 int status = urb->status; 786 787 if (unlikely(status != 0)) 788 if (status != -ENOENT) 789 dev_dbg(&urb->dev->dev, "%s: TX status %d.\n", 790 kaweth->net->name, status); 791 792 netif_wake_queue(kaweth->net); 793 dev_kfree_skb_irq(skb); 794 } 795 796 /**************************************************************** 797 * kaweth_start_xmit 798 ****************************************************************/ 799 static netdev_tx_t kaweth_start_xmit(struct sk_buff *skb, 800 struct net_device *net) 801 { 802 struct kaweth_device *kaweth = netdev_priv(net); 803 __le16 *private_header; 804 805 int res; 806 807 spin_lock_irq(&kaweth->device_lock); 808 809 kaweth_async_set_rx_mode(kaweth); 810 netif_stop_queue(net); 811 if (IS_BLOCKED(kaweth->status)) { 812 goto skip; 813 } 814 815 /* We now decide whether we can put our special header into the sk_buff */ 816 if (skb_cloned(skb) || skb_headroom(skb) < 2) { 817 /* no such luck - we make our own */ 818 struct sk_buff *copied_skb; 819 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC); 820 dev_kfree_skb_irq(skb); 821 skb = copied_skb; 822 if (!copied_skb) { 823 kaweth->stats.tx_errors++; 824 netif_start_queue(net); 825 spin_unlock_irq(&kaweth->device_lock); 826 return NETDEV_TX_OK; 827 } 828 } 829 830 private_header = (__le16 *)__skb_push(skb, 2); 831 *private_header = cpu_to_le16(skb->len-2); 832 kaweth->tx_skb = skb; 833 834 usb_fill_bulk_urb(kaweth->tx_urb, 835 kaweth->dev, 836 usb_sndbulkpipe(kaweth->dev, 2), 837 private_header, 838 skb->len, 839 kaweth_usb_transmit_complete, 840 kaweth); 841 kaweth->end = 0; 842 843 if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC))) 844 { 845 dev_warn(&net->dev, "kaweth failed tx_urb %d\n", res); 846 skip: 847 kaweth->stats.tx_errors++; 848 849 netif_start_queue(net); 850 dev_kfree_skb_irq(skb); 851 } 852 else 853 { 854 kaweth->stats.tx_packets++; 855 kaweth->stats.tx_bytes += skb->len; 856 } 857 858 spin_unlock_irq(&kaweth->device_lock); 859 860 return NETDEV_TX_OK; 861 } 862 863 /**************************************************************** 864 * kaweth_set_rx_mode 865 ****************************************************************/ 866 static void kaweth_set_rx_mode(struct net_device *net) 867 { 868 struct kaweth_device *kaweth = netdev_priv(net); 869 870 __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED | 871 KAWETH_PACKET_FILTER_BROADCAST | 872 KAWETH_PACKET_FILTER_MULTICAST; 873 874 netdev_dbg(net, "Setting Rx mode to %d\n", packet_filter_bitmap); 875 876 netif_stop_queue(net); 877 878 if (net->flags & IFF_PROMISC) { 879 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS; 880 } 881 else if (!netdev_mc_empty(net) || (net->flags & IFF_ALLMULTI)) { 882 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST; 883 } 884 885 kaweth->packet_filter_bitmap = packet_filter_bitmap; 886 netif_wake_queue(net); 887 } 888 889 /**************************************************************** 890 * kaweth_async_set_rx_mode 891 ****************************************************************/ 892 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth) 893 { 894 int result; 895 __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap; 896 897 kaweth->packet_filter_bitmap = 0; 898 if (packet_filter_bitmap == 0) 899 return; 900 901 if (in_interrupt()) 902 return; 903 904 result = kaweth_control(kaweth, 905 usb_sndctrlpipe(kaweth->dev, 0), 906 KAWETH_COMMAND_SET_PACKET_FILTER, 907 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 908 packet_filter_bitmap, 909 0, 910 (void *)&kaweth->scratch, 911 0, 912 KAWETH_CONTROL_TIMEOUT); 913 914 if(result < 0) { 915 dev_err(&kaweth->intf->dev, "Failed to set Rx mode: %d\n", 916 result); 917 } 918 else { 919 netdev_dbg(kaweth->net, "Set Rx mode to %d\n", 920 packet_filter_bitmap); 921 } 922 } 923 924 /**************************************************************** 925 * kaweth_netdev_stats 926 ****************************************************************/ 927 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev) 928 { 929 struct kaweth_device *kaweth = netdev_priv(dev); 930 return &kaweth->stats; 931 } 932 933 /**************************************************************** 934 * kaweth_tx_timeout 935 ****************************************************************/ 936 static void kaweth_tx_timeout(struct net_device *net) 937 { 938 struct kaweth_device *kaweth = netdev_priv(net); 939 940 dev_warn(&net->dev, "%s: Tx timed out. Resetting.\n", net->name); 941 kaweth->stats.tx_errors++; 942 net->trans_start = jiffies; 943 944 usb_unlink_urb(kaweth->tx_urb); 945 } 946 947 /**************************************************************** 948 * kaweth_suspend 949 ****************************************************************/ 950 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message) 951 { 952 struct kaweth_device *kaweth = usb_get_intfdata(intf); 953 unsigned long flags; 954 955 dev_dbg(&intf->dev, "Suspending device\n"); 956 spin_lock_irqsave(&kaweth->device_lock, flags); 957 kaweth->status |= KAWETH_STATUS_SUSPENDING; 958 spin_unlock_irqrestore(&kaweth->device_lock, flags); 959 960 kaweth_kill_urbs(kaweth); 961 return 0; 962 } 963 964 /**************************************************************** 965 * kaweth_resume 966 ****************************************************************/ 967 static int kaweth_resume(struct usb_interface *intf) 968 { 969 struct kaweth_device *kaweth = usb_get_intfdata(intf); 970 unsigned long flags; 971 972 dev_dbg(&intf->dev, "Resuming device\n"); 973 spin_lock_irqsave(&kaweth->device_lock, flags); 974 kaweth->status &= ~KAWETH_STATUS_SUSPENDING; 975 spin_unlock_irqrestore(&kaweth->device_lock, flags); 976 977 if (!kaweth->opened) 978 return 0; 979 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO); 980 kaweth_resubmit_int_urb(kaweth, GFP_NOIO); 981 982 return 0; 983 } 984 985 /**************************************************************** 986 * kaweth_probe 987 ****************************************************************/ 988 989 990 static const struct net_device_ops kaweth_netdev_ops = { 991 .ndo_open = kaweth_open, 992 .ndo_stop = kaweth_close, 993 .ndo_start_xmit = kaweth_start_xmit, 994 .ndo_tx_timeout = kaweth_tx_timeout, 995 .ndo_set_rx_mode = kaweth_set_rx_mode, 996 .ndo_get_stats = kaweth_netdev_stats, 997 .ndo_change_mtu = eth_change_mtu, 998 .ndo_set_mac_address = eth_mac_addr, 999 .ndo_validate_addr = eth_validate_addr, 1000 }; 1001 1002 static int kaweth_probe( 1003 struct usb_interface *intf, 1004 const struct usb_device_id *id /* from id_table */ 1005 ) 1006 { 1007 struct device *dev = &intf->dev; 1008 struct usb_device *udev = interface_to_usbdev(intf); 1009 struct kaweth_device *kaweth; 1010 struct net_device *netdev; 1011 const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; 1012 int result = 0; 1013 1014 dev_dbg(dev, 1015 "Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x\n", 1016 udev->devnum, le16_to_cpu(udev->descriptor.idVendor), 1017 le16_to_cpu(udev->descriptor.idProduct), 1018 le16_to_cpu(udev->descriptor.bcdDevice)); 1019 1020 dev_dbg(dev, "Device at %p\n", udev); 1021 1022 dev_dbg(dev, "Descriptor length: %x type: %x\n", 1023 (int)udev->descriptor.bLength, 1024 (int)udev->descriptor.bDescriptorType); 1025 1026 netdev = alloc_etherdev(sizeof(*kaweth)); 1027 if (!netdev) 1028 return -ENOMEM; 1029 1030 kaweth = netdev_priv(netdev); 1031 kaweth->dev = udev; 1032 kaweth->net = netdev; 1033 1034 spin_lock_init(&kaweth->device_lock); 1035 init_waitqueue_head(&kaweth->term_wait); 1036 1037 dev_dbg(dev, "Resetting.\n"); 1038 1039 kaweth_reset(kaweth); 1040 1041 /* 1042 * If high byte of bcdDevice is nonzero, firmware is already 1043 * downloaded. Don't try to do it again, or we'll hang the device. 1044 */ 1045 1046 if (le16_to_cpu(udev->descriptor.bcdDevice) >> 8) { 1047 dev_info(dev, "Firmware present in device.\n"); 1048 } else { 1049 /* Download the firmware */ 1050 dev_info(dev, "Downloading firmware...\n"); 1051 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL); 1052 if ((result = kaweth_download_firmware(kaweth, 1053 "kaweth/new_code.bin", 1054 100, 1055 2)) < 0) { 1056 dev_err(dev, "Error downloading firmware (%d)\n", 1057 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 dev_err(dev, "Error downloading firmware fix (%d)\n", 1066 result); 1067 goto err_fw; 1068 } 1069 1070 if ((result = kaweth_download_firmware(kaweth, 1071 "kaweth/trigger_code.bin", 1072 126, 1073 2)) < 0) { 1074 dev_err(dev, "Error downloading trigger code (%d)\n", 1075 result); 1076 goto err_fw; 1077 1078 } 1079 1080 if ((result = kaweth_download_firmware(kaweth, 1081 "kaweth/trigger_code_fix.bin", 1082 126, 1083 3)) < 0) { 1084 dev_err(dev, "Error downloading trigger code fix (%d)\n", result); 1085 goto err_fw; 1086 } 1087 1088 1089 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) { 1090 dev_err(dev, "Error triggering firmware (%d)\n", result); 1091 goto err_fw; 1092 } 1093 1094 /* Device will now disappear for a moment... */ 1095 dev_info(dev, "Firmware loaded. I'll be back...\n"); 1096 err_fw: 1097 free_page((unsigned long)kaweth->firmware_buf); 1098 free_netdev(netdev); 1099 return -EIO; 1100 } 1101 1102 result = kaweth_read_configuration(kaweth); 1103 1104 if(result < 0) { 1105 dev_err(dev, "Error reading configuration (%d), no net device created\n", result); 1106 goto err_free_netdev; 1107 } 1108 1109 dev_info(dev, "Statistics collection: %x\n", kaweth->configuration.statistics_mask); 1110 dev_info(dev, "Multicast filter limit: %x\n", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1)); 1111 dev_info(dev, "MTU: %d\n", le16_to_cpu(kaweth->configuration.segment_size)); 1112 dev_info(dev, "Read MAC address %pM\n", kaweth->configuration.hw_addr); 1113 1114 if(!memcmp(&kaweth->configuration.hw_addr, 1115 &bcast_addr, 1116 sizeof(bcast_addr))) { 1117 dev_err(dev, "Firmware not functioning properly, no net device created\n"); 1118 goto err_free_netdev; 1119 } 1120 1121 if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) { 1122 dev_dbg(dev, "Error setting URB size\n"); 1123 goto err_free_netdev; 1124 } 1125 1126 if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) { 1127 dev_err(dev, "Error setting SOFS wait\n"); 1128 goto err_free_netdev; 1129 } 1130 1131 result = kaweth_set_receive_filter(kaweth, 1132 KAWETH_PACKET_FILTER_DIRECTED | 1133 KAWETH_PACKET_FILTER_BROADCAST | 1134 KAWETH_PACKET_FILTER_MULTICAST); 1135 1136 if(result < 0) { 1137 dev_err(dev, "Error setting receive filter\n"); 1138 goto err_free_netdev; 1139 } 1140 1141 dev_dbg(dev, "Initializing net device.\n"); 1142 1143 kaweth->intf = intf; 1144 1145 kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 1146 if (!kaweth->tx_urb) 1147 goto err_free_netdev; 1148 kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL); 1149 if (!kaweth->rx_urb) 1150 goto err_only_tx; 1151 kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL); 1152 if (!kaweth->irq_urb) 1153 goto err_tx_and_rx; 1154 1155 kaweth->intbuffer = usb_alloc_coherent( kaweth->dev, 1156 INTBUFFERSIZE, 1157 GFP_KERNEL, 1158 &kaweth->intbufferhandle); 1159 if (!kaweth->intbuffer) 1160 goto err_tx_and_rx_and_irq; 1161 kaweth->rx_buf = usb_alloc_coherent( kaweth->dev, 1162 KAWETH_BUF_SIZE, 1163 GFP_KERNEL, 1164 &kaweth->rxbufferhandle); 1165 if (!kaweth->rx_buf) 1166 goto err_all_but_rxbuf; 1167 1168 memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr)); 1169 memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr, 1170 sizeof(kaweth->configuration.hw_addr)); 1171 1172 netdev->netdev_ops = &kaweth_netdev_ops; 1173 netdev->watchdog_timeo = KAWETH_TX_TIMEOUT; 1174 netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size); 1175 SET_ETHTOOL_OPS(netdev, &ops); 1176 1177 /* kaweth is zeroed as part of alloc_netdev */ 1178 INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl); 1179 usb_set_intfdata(intf, kaweth); 1180 1181 #if 0 1182 // dma_supported() is deeply broken on almost all architectures 1183 if (dma_supported (dev, 0xffffffffffffffffULL)) 1184 kaweth->net->features |= NETIF_F_HIGHDMA; 1185 #endif 1186 1187 SET_NETDEV_DEV(netdev, dev); 1188 if (register_netdev(netdev) != 0) { 1189 dev_err(dev, "Error registering netdev.\n"); 1190 goto err_intfdata; 1191 } 1192 1193 dev_info(dev, "kaweth interface created at %s\n", 1194 kaweth->net->name); 1195 1196 dev_dbg(dev, "Kaweth probe returning.\n"); 1197 1198 return 0; 1199 1200 err_intfdata: 1201 usb_set_intfdata(intf, NULL); 1202 usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle); 1203 err_all_but_rxbuf: 1204 usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle); 1205 err_tx_and_rx_and_irq: 1206 usb_free_urb(kaweth->irq_urb); 1207 err_tx_and_rx: 1208 usb_free_urb(kaweth->rx_urb); 1209 err_only_tx: 1210 usb_free_urb(kaweth->tx_urb); 1211 err_free_netdev: 1212 free_netdev(netdev); 1213 1214 return -EIO; 1215 } 1216 1217 /**************************************************************** 1218 * kaweth_disconnect 1219 ****************************************************************/ 1220 static void kaweth_disconnect(struct usb_interface *intf) 1221 { 1222 struct kaweth_device *kaweth = usb_get_intfdata(intf); 1223 struct net_device *netdev; 1224 1225 dev_info(&intf->dev, "Unregistering\n"); 1226 1227 usb_set_intfdata(intf, NULL); 1228 if (!kaweth) { 1229 dev_warn(&intf->dev, "unregistering non-existent device\n"); 1230 return; 1231 } 1232 netdev = kaweth->net; 1233 1234 netdev_dbg(kaweth->net, "Unregistering net device\n"); 1235 unregister_netdev(netdev); 1236 1237 usb_free_urb(kaweth->rx_urb); 1238 usb_free_urb(kaweth->tx_urb); 1239 usb_free_urb(kaweth->irq_urb); 1240 1241 usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle); 1242 usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle); 1243 1244 free_netdev(netdev); 1245 } 1246 1247 1248 // FIXME this completion stuff is a modified clone of 1249 // an OLD version of some stuff in usb.c ... 1250 struct usb_api_data { 1251 wait_queue_head_t wqh; 1252 int done; 1253 }; 1254 1255 /*-------------------------------------------------------------------* 1256 * completion handler for compatibility wrappers (sync control/bulk) * 1257 *-------------------------------------------------------------------*/ 1258 static void usb_api_blocking_completion(struct urb *urb) 1259 { 1260 struct usb_api_data *awd = (struct usb_api_data *)urb->context; 1261 1262 awd->done=1; 1263 wake_up(&awd->wqh); 1264 } 1265 1266 /*-------------------------------------------------------------------* 1267 * COMPATIBILITY STUFF * 1268 *-------------------------------------------------------------------*/ 1269 1270 // Starts urb and waits for completion or timeout 1271 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length) 1272 { 1273 struct usb_api_data awd; 1274 int status; 1275 1276 init_waitqueue_head(&awd.wqh); 1277 awd.done = 0; 1278 1279 urb->context = &awd; 1280 status = usb_submit_urb(urb, GFP_NOIO); 1281 if (status) { 1282 // something went wrong 1283 usb_free_urb(urb); 1284 return status; 1285 } 1286 1287 if (!wait_event_timeout(awd.wqh, awd.done, timeout)) { 1288 // timeout 1289 dev_warn(&urb->dev->dev, "usb_control/bulk_msg: timeout\n"); 1290 usb_kill_urb(urb); // remove urb safely 1291 status = -ETIMEDOUT; 1292 } 1293 else { 1294 status = urb->status; 1295 } 1296 1297 if (actual_length) { 1298 *actual_length = urb->actual_length; 1299 } 1300 1301 usb_free_urb(urb); 1302 return status; 1303 } 1304 1305 /*-------------------------------------------------------------------*/ 1306 // returns status (negative) or length (positive) 1307 static int kaweth_internal_control_msg(struct usb_device *usb_dev, 1308 unsigned int pipe, 1309 struct usb_ctrlrequest *cmd, void *data, 1310 int len, int timeout) 1311 { 1312 struct urb *urb; 1313 int retv; 1314 int length = 0; /* shut up GCC */ 1315 1316 urb = usb_alloc_urb(0, GFP_ATOMIC); 1317 if (!urb) 1318 return -ENOMEM; 1319 1320 usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data, 1321 len, usb_api_blocking_completion, NULL); 1322 1323 retv = usb_start_wait_urb(urb, timeout, &length); 1324 if (retv < 0) { 1325 return retv; 1326 } 1327 else { 1328 return length; 1329 } 1330 } 1331 1332 module_usb_driver(kaweth_driver); 1333