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