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/delay.h> 49 #include <linux/netdevice.h> 50 #include <linux/etherdevice.h> 51 #include <linux/usb.h> 52 #include <linux/types.h> 53 #include <linux/ethtool.h> 54 #include <linux/dma-mapping.h> 55 #include <linux/wait.h> 56 #include <linux/firmware.h> 57 #include <asm/uaccess.h> 58 #include <asm/byteorder.h> 59 60 #undef DEBUG 61 62 #define KAWETH_MTU 1514 63 #define KAWETH_BUF_SIZE 1664 64 #define KAWETH_TX_TIMEOUT (5 * HZ) 65 #define KAWETH_SCRATCH_SIZE 32 66 #define KAWETH_FIRMWARE_BUF_SIZE 4096 67 #define KAWETH_CONTROL_TIMEOUT (30000) 68 69 #define KAWETH_STATUS_BROKEN 0x0000001 70 #define KAWETH_STATUS_CLOSING 0x0000002 71 #define KAWETH_STATUS_SUSPENDING 0x0000004 72 73 #define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING) 74 75 #define KAWETH_PACKET_FILTER_PROMISCUOUS 0x01 76 #define KAWETH_PACKET_FILTER_ALL_MULTICAST 0x02 77 #define KAWETH_PACKET_FILTER_DIRECTED 0x04 78 #define KAWETH_PACKET_FILTER_BROADCAST 0x08 79 #define KAWETH_PACKET_FILTER_MULTICAST 0x10 80 81 /* Table 7 */ 82 #define KAWETH_COMMAND_GET_ETHERNET_DESC 0x00 83 #define KAWETH_COMMAND_MULTICAST_FILTERS 0x01 84 #define KAWETH_COMMAND_SET_PACKET_FILTER 0x02 85 #define KAWETH_COMMAND_STATISTICS 0x03 86 #define KAWETH_COMMAND_SET_TEMP_MAC 0x06 87 #define KAWETH_COMMAND_GET_TEMP_MAC 0x07 88 #define KAWETH_COMMAND_SET_URB_SIZE 0x08 89 #define KAWETH_COMMAND_SET_SOFS_WAIT 0x09 90 #define KAWETH_COMMAND_SCAN 0xFF 91 92 #define KAWETH_SOFS_TO_WAIT 0x05 93 94 #define INTBUFFERSIZE 4 95 96 #define STATE_OFFSET 0 97 #define STATE_MASK 0x40 98 #define STATE_SHIFT 5 99 100 #define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED) 101 102 103 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>"); 104 MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver"); 105 MODULE_LICENSE("GPL"); 106 MODULE_FIRMWARE("kaweth/new_code.bin"); 107 MODULE_FIRMWARE("kaweth/new_code_fix.bin"); 108 MODULE_FIRMWARE("kaweth/trigger_code.bin"); 109 MODULE_FIRMWARE("kaweth/trigger_code_fix.bin"); 110 111 static const char driver_name[] = "kaweth"; 112 113 static int kaweth_probe( 114 struct usb_interface *intf, 115 const struct usb_device_id *id /* from id_table */ 116 ); 117 static void kaweth_disconnect(struct usb_interface *intf); 118 static int kaweth_internal_control_msg(struct usb_device *usb_dev, 119 unsigned int pipe, 120 struct usb_ctrlrequest *cmd, void *data, 121 int len, int timeout); 122 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message); 123 static int kaweth_resume(struct usb_interface *intf); 124 125 /**************************************************************** 126 * usb_device_id 127 ****************************************************************/ 128 static struct usb_device_id usb_klsi_table[] = { 129 { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */ 130 { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */ 131 { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */ 132 { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */ 133 { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */ 134 { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */ 135 { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */ 136 { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */ 137 { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */ 138 { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */ 139 { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */ 140 { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */ 141 { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */ 142 { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */ 143 { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */ 144 { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */ 145 { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */ 146 { USB_DEVICE(0x07c9, 0xb010) }, /* Allied Telesyn AT-USB10 USB Ethernet Adapter */ 147 { USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */ 148 { USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */ 149 { USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */ 150 { USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */ 151 { USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */ 152 { USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */ 153 { USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */ 154 { USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */ 155 { USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */ 156 { USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */ 157 { USB_DEVICE(0x1485, 0x0001) }, /* Silicom U2E */ 158 { USB_DEVICE(0x1485, 0x0002) }, /* Psion Dacom Gold Port Ethernet */ 159 { USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */ 160 { USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */ 161 { USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */ 162 { USB_DEVICE(0x1668, 0x0323) }, /* Actiontec USB Ethernet */ 163 { USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */ 164 {} /* Null terminator */ 165 }; 166 167 MODULE_DEVICE_TABLE (usb, usb_klsi_table); 168 169 /**************************************************************** 170 * kaweth_driver 171 ****************************************************************/ 172 static struct usb_driver kaweth_driver = { 173 .name = driver_name, 174 .probe = kaweth_probe, 175 .disconnect = kaweth_disconnect, 176 .suspend = kaweth_suspend, 177 .resume = kaweth_resume, 178 .id_table = usb_klsi_table, 179 .supports_autosuspend = 1, 180 .disable_hub_initiated_lpm = 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 } __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 netdev_dbg(kaweth->net, "kaweth_control()\n"); 269 270 if(in_interrupt()) { 271 netdev_dbg(kaweth->net, "in_interrupt()\n"); 272 return -EBUSY; 273 } 274 275 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC); 276 if (!dr) 277 return -ENOMEM; 278 279 dr->bRequestType = requesttype; 280 dr->bRequest = request; 281 dr->wValue = cpu_to_le16(value); 282 dr->wIndex = cpu_to_le16(index); 283 dr->wLength = cpu_to_le16(size); 284 285 retval = kaweth_internal_control_msg(kaweth->dev, 286 pipe, 287 dr, 288 data, 289 size, 290 timeout); 291 292 kfree(dr); 293 return retval; 294 } 295 296 /**************************************************************** 297 * kaweth_read_configuration 298 ****************************************************************/ 299 static int kaweth_read_configuration(struct kaweth_device *kaweth) 300 { 301 int retval; 302 303 netdev_dbg(kaweth->net, "Reading kaweth configuration\n"); 304 305 retval = kaweth_control(kaweth, 306 usb_rcvctrlpipe(kaweth->dev, 0), 307 KAWETH_COMMAND_GET_ETHERNET_DESC, 308 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE, 309 0, 310 0, 311 (void *)&kaweth->configuration, 312 sizeof(kaweth->configuration), 313 KAWETH_CONTROL_TIMEOUT); 314 315 return retval; 316 } 317 318 /**************************************************************** 319 * kaweth_set_urb_size 320 ****************************************************************/ 321 static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size) 322 { 323 int retval; 324 325 netdev_dbg(kaweth->net, "Setting URB size to %d\n", (unsigned)urb_size); 326 327 retval = kaweth_control(kaweth, 328 usb_sndctrlpipe(kaweth->dev, 0), 329 KAWETH_COMMAND_SET_URB_SIZE, 330 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 331 urb_size, 332 0, 333 (void *)&kaweth->scratch, 334 0, 335 KAWETH_CONTROL_TIMEOUT); 336 337 return retval; 338 } 339 340 /**************************************************************** 341 * kaweth_set_sofs_wait 342 ****************************************************************/ 343 static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait) 344 { 345 int retval; 346 347 netdev_dbg(kaweth->net, "Set SOFS wait to %d\n", (unsigned)sofs_wait); 348 349 retval = kaweth_control(kaweth, 350 usb_sndctrlpipe(kaweth->dev, 0), 351 KAWETH_COMMAND_SET_SOFS_WAIT, 352 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 353 sofs_wait, 354 0, 355 (void *)&kaweth->scratch, 356 0, 357 KAWETH_CONTROL_TIMEOUT); 358 359 return retval; 360 } 361 362 /**************************************************************** 363 * kaweth_set_receive_filter 364 ****************************************************************/ 365 static int kaweth_set_receive_filter(struct kaweth_device *kaweth, 366 __u16 receive_filter) 367 { 368 int retval; 369 370 netdev_dbg(kaweth->net, "Set receive filter to %d\n", 371 (unsigned)receive_filter); 372 373 retval = kaweth_control(kaweth, 374 usb_sndctrlpipe(kaweth->dev, 0), 375 KAWETH_COMMAND_SET_PACKET_FILTER, 376 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 377 receive_filter, 378 0, 379 (void *)&kaweth->scratch, 380 0, 381 KAWETH_CONTROL_TIMEOUT); 382 383 return retval; 384 } 385 386 /**************************************************************** 387 * kaweth_download_firmware 388 ****************************************************************/ 389 static int kaweth_download_firmware(struct kaweth_device *kaweth, 390 const char *fwname, 391 __u8 interrupt, 392 __u8 type) 393 { 394 const struct firmware *fw; 395 int data_len; 396 int ret; 397 398 ret = request_firmware(&fw, fwname, &kaweth->dev->dev); 399 if (ret) { 400 dev_err(&kaweth->intf->dev, "Firmware request failed\n"); 401 return ret; 402 } 403 404 if (fw->size > KAWETH_FIRMWARE_BUF_SIZE) { 405 dev_err(&kaweth->intf->dev, "Firmware too big: %zu\n", 406 fw->size); 407 release_firmware(fw); 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 netdev_dbg(kaweth->net, "High: %i, Low:%i\n", kaweth->firmware_buf[3], 421 kaweth->firmware_buf[2]); 422 423 netdev_dbg(kaweth->net, 424 "Downloading firmware at %p to kaweth device at %p\n", 425 kaweth->firmware_buf, kaweth); 426 netdev_dbg(kaweth->net, "Firmware length: %d\n", data_len); 427 428 return kaweth_control(kaweth, 429 usb_sndctrlpipe(kaweth->dev, 0), 430 KAWETH_COMMAND_SCAN, 431 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 432 0, 433 0, 434 (void *)kaweth->firmware_buf, 435 data_len, 436 KAWETH_CONTROL_TIMEOUT); 437 } 438 439 /**************************************************************** 440 * kaweth_trigger_firmware 441 ****************************************************************/ 442 static int kaweth_trigger_firmware(struct kaweth_device *kaweth, 443 __u8 interrupt) 444 { 445 kaweth->firmware_buf[0] = 0xB6; 446 kaweth->firmware_buf[1] = 0xC3; 447 kaweth->firmware_buf[2] = 0x01; 448 kaweth->firmware_buf[3] = 0x00; 449 kaweth->firmware_buf[4] = 0x06; 450 kaweth->firmware_buf[5] = interrupt; 451 kaweth->firmware_buf[6] = 0x00; 452 kaweth->firmware_buf[7] = 0x00; 453 454 netdev_dbg(kaweth->net, "Triggering firmware\n"); 455 456 return kaweth_control(kaweth, 457 usb_sndctrlpipe(kaweth->dev, 0), 458 KAWETH_COMMAND_SCAN, 459 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 460 0, 461 0, 462 (void *)kaweth->firmware_buf, 463 8, 464 KAWETH_CONTROL_TIMEOUT); 465 } 466 467 /**************************************************************** 468 * kaweth_reset 469 ****************************************************************/ 470 static int kaweth_reset(struct kaweth_device *kaweth) 471 { 472 int result; 473 474 netdev_dbg(kaweth->net, "kaweth_reset(%p)\n", kaweth); 475 result = usb_reset_configuration(kaweth->dev); 476 mdelay(10); 477 478 netdev_dbg(kaweth->net, "kaweth_reset() returns %d.\n", result); 479 480 return result; 481 } 482 483 static void kaweth_usb_receive(struct urb *); 484 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t); 485 486 /**************************************************************** 487 int_callback 488 *****************************************************************/ 489 490 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf) 491 { 492 int status; 493 494 status = usb_submit_urb (kaweth->irq_urb, mf); 495 if (unlikely(status == -ENOMEM)) { 496 kaweth->suspend_lowmem_ctrl = 1; 497 schedule_delayed_work(&kaweth->lowmem_work, HZ/4); 498 } else { 499 kaweth->suspend_lowmem_ctrl = 0; 500 } 501 502 if (status) 503 dev_err(&kaweth->intf->dev, 504 "can't resubmit intr, %s-%s, status %d\n", 505 kaweth->dev->bus->bus_name, 506 kaweth->dev->devpath, status); 507 } 508 509 static void int_callback(struct urb *u) 510 { 511 struct kaweth_device *kaweth = u->context; 512 int act_state; 513 int status = u->status; 514 515 switch (status) { 516 case 0: /* success */ 517 break; 518 case -ECONNRESET: /* unlink */ 519 case -ENOENT: 520 case -ESHUTDOWN: 521 return; 522 /* -EPIPE: should clear the halt */ 523 default: /* error */ 524 goto resubmit; 525 } 526 527 /* we check the link state to report changes */ 528 if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) { 529 if (act_state) 530 netif_carrier_on(kaweth->net); 531 else 532 netif_carrier_off(kaweth->net); 533 534 kaweth->linkstate = act_state; 535 } 536 resubmit: 537 kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC); 538 } 539 540 static void kaweth_resubmit_tl(struct work_struct *work) 541 { 542 struct kaweth_device *kaweth = 543 container_of(work, struct kaweth_device, lowmem_work.work); 544 545 if (IS_BLOCKED(kaweth->status)) 546 return; 547 548 if (kaweth->suspend_lowmem_rx) 549 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO); 550 551 if (kaweth->suspend_lowmem_ctrl) 552 kaweth_resubmit_int_urb(kaweth, GFP_NOIO); 553 } 554 555 556 /**************************************************************** 557 * kaweth_resubmit_rx_urb 558 ****************************************************************/ 559 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth, 560 gfp_t mem_flags) 561 { 562 int result; 563 564 usb_fill_bulk_urb(kaweth->rx_urb, 565 kaweth->dev, 566 usb_rcvbulkpipe(kaweth->dev, 1), 567 kaweth->rx_buf, 568 KAWETH_BUF_SIZE, 569 kaweth_usb_receive, 570 kaweth); 571 kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 572 kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle; 573 574 if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) { 575 if (result == -ENOMEM) { 576 kaweth->suspend_lowmem_rx = 1; 577 schedule_delayed_work(&kaweth->lowmem_work, HZ/4); 578 } 579 dev_err(&kaweth->intf->dev, "resubmitting rx_urb %d failed\n", 580 result); 581 } else { 582 kaweth->suspend_lowmem_rx = 0; 583 } 584 585 return result; 586 } 587 588 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth); 589 590 /**************************************************************** 591 * kaweth_usb_receive 592 ****************************************************************/ 593 static void kaweth_usb_receive(struct urb *urb) 594 { 595 struct device *dev = &urb->dev->dev; 596 struct kaweth_device *kaweth = urb->context; 597 struct net_device *net = kaweth->net; 598 int status = urb->status; 599 600 int count = urb->actual_length; 601 int count2 = urb->transfer_buffer_length; 602 603 __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf); 604 605 struct sk_buff *skb; 606 607 if (unlikely(status == -EPIPE)) { 608 kaweth->stats.rx_errors++; 609 kaweth->end = 1; 610 wake_up(&kaweth->term_wait); 611 dev_dbg(dev, "Status was -EPIPE.\n"); 612 return; 613 } 614 if (unlikely(status == -ECONNRESET || status == -ESHUTDOWN)) { 615 /* we are killed - set a flag and wake the disconnect handler */ 616 kaweth->end = 1; 617 wake_up(&kaweth->term_wait); 618 dev_dbg(dev, "Status was -ECONNRESET or -ESHUTDOWN.\n"); 619 return; 620 } 621 if (unlikely(status == -EPROTO || status == -ETIME || 622 status == -EILSEQ)) { 623 kaweth->stats.rx_errors++; 624 dev_dbg(dev, "Status was -EPROTO, -ETIME, or -EILSEQ.\n"); 625 return; 626 } 627 if (unlikely(status == -EOVERFLOW)) { 628 kaweth->stats.rx_errors++; 629 dev_dbg(dev, "Status was -EOVERFLOW.\n"); 630 } 631 spin_lock(&kaweth->device_lock); 632 if (IS_BLOCKED(kaweth->status)) { 633 spin_unlock(&kaweth->device_lock); 634 return; 635 } 636 spin_unlock(&kaweth->device_lock); 637 638 if(status && status != -EREMOTEIO && count != 1) { 639 dev_err(&kaweth->intf->dev, 640 "%s RX status: %d count: %d packet_len: %d\n", 641 net->name, status, count, (int)pkt_len); 642 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 643 return; 644 } 645 646 if(kaweth->net && (count > 2)) { 647 if(pkt_len > (count - 2)) { 648 dev_err(&kaweth->intf->dev, 649 "Packet length too long for USB frame (pkt_len: %x, count: %x)\n", 650 pkt_len, count); 651 dev_err(&kaweth->intf->dev, "Packet len & 2047: %x\n", 652 pkt_len & 2047); 653 dev_err(&kaweth->intf->dev, "Count 2: %x\n", count2); 654 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 655 return; 656 } 657 658 if(!(skb = dev_alloc_skb(pkt_len+2))) { 659 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 660 return; 661 } 662 663 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */ 664 665 skb_copy_to_linear_data(skb, kaweth->rx_buf + 2, pkt_len); 666 667 skb_put(skb, pkt_len); 668 669 skb->protocol = eth_type_trans(skb, net); 670 671 netif_rx(skb); 672 673 kaweth->stats.rx_packets++; 674 kaweth->stats.rx_bytes += pkt_len; 675 } 676 677 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 678 } 679 680 /**************************************************************** 681 * kaweth_open 682 ****************************************************************/ 683 static int kaweth_open(struct net_device *net) 684 { 685 struct kaweth_device *kaweth = netdev_priv(net); 686 int res; 687 688 netdev_dbg(kaweth->net, "Opening network device.\n"); 689 690 res = usb_autopm_get_interface(kaweth->intf); 691 if (res) { 692 dev_err(&kaweth->intf->dev, "Interface cannot be resumed.\n"); 693 return -EIO; 694 } 695 res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL); 696 if (res) 697 goto err_out; 698 699 usb_fill_int_urb( 700 kaweth->irq_urb, 701 kaweth->dev, 702 usb_rcvintpipe(kaweth->dev, 3), 703 kaweth->intbuffer, 704 INTBUFFERSIZE, 705 int_callback, 706 kaweth, 707 250); /* overriding the descriptor */ 708 kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle; 709 kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 710 711 res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL); 712 if (res) { 713 usb_kill_urb(kaweth->rx_urb); 714 goto err_out; 715 } 716 kaweth->opened = 1; 717 718 netif_start_queue(net); 719 720 kaweth_async_set_rx_mode(kaweth); 721 return 0; 722 723 err_out: 724 usb_autopm_put_interface(kaweth->intf); 725 return -EIO; 726 } 727 728 /**************************************************************** 729 * kaweth_kill_urbs 730 ****************************************************************/ 731 static void kaweth_kill_urbs(struct kaweth_device *kaweth) 732 { 733 usb_kill_urb(kaweth->irq_urb); 734 usb_kill_urb(kaweth->rx_urb); 735 usb_kill_urb(kaweth->tx_urb); 736 737 cancel_delayed_work_sync(&kaweth->lowmem_work); 738 739 /* a scheduled work may have resubmitted, 740 we hit them again */ 741 usb_kill_urb(kaweth->irq_urb); 742 usb_kill_urb(kaweth->rx_urb); 743 } 744 745 /**************************************************************** 746 * kaweth_close 747 ****************************************************************/ 748 static int kaweth_close(struct net_device *net) 749 { 750 struct kaweth_device *kaweth = netdev_priv(net); 751 752 netif_stop_queue(net); 753 kaweth->opened = 0; 754 755 kaweth->status |= KAWETH_STATUS_CLOSING; 756 757 kaweth_kill_urbs(kaweth); 758 759 kaweth->status &= ~KAWETH_STATUS_CLOSING; 760 761 usb_autopm_put_interface(kaweth->intf); 762 763 return 0; 764 } 765 766 static u32 kaweth_get_link(struct net_device *dev) 767 { 768 struct kaweth_device *kaweth = netdev_priv(dev); 769 770 return kaweth->linkstate; 771 } 772 773 static const struct ethtool_ops ops = { 774 .get_link = kaweth_get_link 775 }; 776 777 /**************************************************************** 778 * kaweth_usb_transmit_complete 779 ****************************************************************/ 780 static void kaweth_usb_transmit_complete(struct urb *urb) 781 { 782 struct kaweth_device *kaweth = urb->context; 783 struct sk_buff *skb = kaweth->tx_skb; 784 int status = urb->status; 785 786 if (unlikely(status != 0)) 787 if (status != -ENOENT) 788 dev_dbg(&urb->dev->dev, "%s: TX status %d.\n", 789 kaweth->net->name, status); 790 791 netif_wake_queue(kaweth->net); 792 dev_kfree_skb_irq(skb); 793 } 794 795 /**************************************************************** 796 * kaweth_start_xmit 797 ****************************************************************/ 798 static netdev_tx_t kaweth_start_xmit(struct sk_buff *skb, 799 struct net_device *net) 800 { 801 struct kaweth_device *kaweth = netdev_priv(net); 802 __le16 *private_header; 803 804 int res; 805 806 spin_lock_irq(&kaweth->device_lock); 807 808 kaweth_async_set_rx_mode(kaweth); 809 netif_stop_queue(net); 810 if (IS_BLOCKED(kaweth->status)) { 811 goto skip; 812 } 813 814 /* We now decide whether we can put our special header into the sk_buff */ 815 if (skb_cloned(skb) || skb_headroom(skb) < 2) { 816 /* no such luck - we make our own */ 817 struct sk_buff *copied_skb; 818 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC); 819 dev_kfree_skb_irq(skb); 820 skb = copied_skb; 821 if (!copied_skb) { 822 kaweth->stats.tx_errors++; 823 netif_start_queue(net); 824 spin_unlock_irq(&kaweth->device_lock); 825 return NETDEV_TX_OK; 826 } 827 } 828 829 private_header = (__le16 *)__skb_push(skb, 2); 830 *private_header = cpu_to_le16(skb->len-2); 831 kaweth->tx_skb = skb; 832 833 usb_fill_bulk_urb(kaweth->tx_urb, 834 kaweth->dev, 835 usb_sndbulkpipe(kaweth->dev, 2), 836 private_header, 837 skb->len, 838 kaweth_usb_transmit_complete, 839 kaweth); 840 kaweth->end = 0; 841 842 if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC))) 843 { 844 dev_warn(&net->dev, "kaweth failed tx_urb %d\n", res); 845 skip: 846 kaweth->stats.tx_errors++; 847 848 netif_start_queue(net); 849 dev_kfree_skb_irq(skb); 850 } 851 else 852 { 853 kaweth->stats.tx_packets++; 854 kaweth->stats.tx_bytes += skb->len; 855 } 856 857 spin_unlock_irq(&kaweth->device_lock); 858 859 return NETDEV_TX_OK; 860 } 861 862 /**************************************************************** 863 * kaweth_set_rx_mode 864 ****************************************************************/ 865 static void kaweth_set_rx_mode(struct net_device *net) 866 { 867 struct kaweth_device *kaweth = netdev_priv(net); 868 869 __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED | 870 KAWETH_PACKET_FILTER_BROADCAST | 871 KAWETH_PACKET_FILTER_MULTICAST; 872 873 netdev_dbg(net, "Setting Rx mode to %d\n", packet_filter_bitmap); 874 875 netif_stop_queue(net); 876 877 if (net->flags & IFF_PROMISC) { 878 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS; 879 } 880 else if (!netdev_mc_empty(net) || (net->flags & IFF_ALLMULTI)) { 881 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST; 882 } 883 884 kaweth->packet_filter_bitmap = packet_filter_bitmap; 885 netif_wake_queue(net); 886 } 887 888 /**************************************************************** 889 * kaweth_async_set_rx_mode 890 ****************************************************************/ 891 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth) 892 { 893 int result; 894 __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap; 895 896 kaweth->packet_filter_bitmap = 0; 897 if (packet_filter_bitmap == 0) 898 return; 899 900 if (in_interrupt()) 901 return; 902 903 result = kaweth_control(kaweth, 904 usb_sndctrlpipe(kaweth->dev, 0), 905 KAWETH_COMMAND_SET_PACKET_FILTER, 906 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 907 packet_filter_bitmap, 908 0, 909 (void *)&kaweth->scratch, 910 0, 911 KAWETH_CONTROL_TIMEOUT); 912 913 if(result < 0) { 914 dev_err(&kaweth->intf->dev, "Failed to set Rx mode: %d\n", 915 result); 916 } 917 else { 918 netdev_dbg(kaweth->net, "Set Rx mode to %d\n", 919 packet_filter_bitmap); 920 } 921 } 922 923 /**************************************************************** 924 * kaweth_netdev_stats 925 ****************************************************************/ 926 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev) 927 { 928 struct kaweth_device *kaweth = netdev_priv(dev); 929 return &kaweth->stats; 930 } 931 932 /**************************************************************** 933 * kaweth_tx_timeout 934 ****************************************************************/ 935 static void kaweth_tx_timeout(struct net_device *net) 936 { 937 struct kaweth_device *kaweth = netdev_priv(net); 938 939 dev_warn(&net->dev, "%s: Tx timed out. Resetting.\n", net->name); 940 kaweth->stats.tx_errors++; 941 net->trans_start = jiffies; 942 943 usb_unlink_urb(kaweth->tx_urb); 944 } 945 946 /**************************************************************** 947 * kaweth_suspend 948 ****************************************************************/ 949 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message) 950 { 951 struct kaweth_device *kaweth = usb_get_intfdata(intf); 952 unsigned long flags; 953 954 dev_dbg(&intf->dev, "Suspending device\n"); 955 spin_lock_irqsave(&kaweth->device_lock, flags); 956 kaweth->status |= KAWETH_STATUS_SUSPENDING; 957 spin_unlock_irqrestore(&kaweth->device_lock, flags); 958 959 kaweth_kill_urbs(kaweth); 960 return 0; 961 } 962 963 /**************************************************************** 964 * kaweth_resume 965 ****************************************************************/ 966 static int kaweth_resume(struct usb_interface *intf) 967 { 968 struct kaweth_device *kaweth = usb_get_intfdata(intf); 969 unsigned long flags; 970 971 dev_dbg(&intf->dev, "Resuming device\n"); 972 spin_lock_irqsave(&kaweth->device_lock, flags); 973 kaweth->status &= ~KAWETH_STATUS_SUSPENDING; 974 spin_unlock_irqrestore(&kaweth->device_lock, flags); 975 976 if (!kaweth->opened) 977 return 0; 978 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO); 979 kaweth_resubmit_int_urb(kaweth, GFP_NOIO); 980 981 return 0; 982 } 983 984 /**************************************************************** 985 * kaweth_probe 986 ****************************************************************/ 987 988 989 static const struct net_device_ops kaweth_netdev_ops = { 990 .ndo_open = kaweth_open, 991 .ndo_stop = kaweth_close, 992 .ndo_start_xmit = kaweth_start_xmit, 993 .ndo_tx_timeout = kaweth_tx_timeout, 994 .ndo_set_rx_mode = kaweth_set_rx_mode, 995 .ndo_get_stats = kaweth_netdev_stats, 996 .ndo_change_mtu = eth_change_mtu, 997 .ndo_set_mac_address = eth_mac_addr, 998 .ndo_validate_addr = eth_validate_addr, 999 }; 1000 1001 static int kaweth_probe( 1002 struct usb_interface *intf, 1003 const struct usb_device_id *id /* from id_table */ 1004 ) 1005 { 1006 struct device *dev = &intf->dev; 1007 struct usb_device *udev = interface_to_usbdev(intf); 1008 struct kaweth_device *kaweth; 1009 struct net_device *netdev; 1010 const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; 1011 int result = 0; 1012 1013 dev_dbg(dev, 1014 "Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x\n", 1015 udev->devnum, le16_to_cpu(udev->descriptor.idVendor), 1016 le16_to_cpu(udev->descriptor.idProduct), 1017 le16_to_cpu(udev->descriptor.bcdDevice)); 1018 1019 dev_dbg(dev, "Device at %p\n", udev); 1020 1021 dev_dbg(dev, "Descriptor length: %x type: %x\n", 1022 (int)udev->descriptor.bLength, 1023 (int)udev->descriptor.bDescriptorType); 1024 1025 netdev = alloc_etherdev(sizeof(*kaweth)); 1026 if (!netdev) 1027 return -ENOMEM; 1028 1029 kaweth = netdev_priv(netdev); 1030 kaweth->dev = udev; 1031 kaweth->net = netdev; 1032 1033 spin_lock_init(&kaweth->device_lock); 1034 init_waitqueue_head(&kaweth->term_wait); 1035 1036 dev_dbg(dev, "Resetting.\n"); 1037 1038 kaweth_reset(kaweth); 1039 1040 /* 1041 * If high byte of bcdDevice is nonzero, firmware is already 1042 * downloaded. Don't try to do it again, or we'll hang the device. 1043 */ 1044 1045 if (le16_to_cpu(udev->descriptor.bcdDevice) >> 8) { 1046 dev_info(dev, "Firmware present in device.\n"); 1047 } else { 1048 /* Download the firmware */ 1049 dev_info(dev, "Downloading firmware...\n"); 1050 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL); 1051 if ((result = kaweth_download_firmware(kaweth, 1052 "kaweth/new_code.bin", 1053 100, 1054 2)) < 0) { 1055 dev_err(dev, "Error downloading firmware (%d)\n", 1056 result); 1057 goto err_fw; 1058 } 1059 1060 if ((result = kaweth_download_firmware(kaweth, 1061 "kaweth/new_code_fix.bin", 1062 100, 1063 3)) < 0) { 1064 dev_err(dev, "Error downloading firmware fix (%d)\n", 1065 result); 1066 goto err_fw; 1067 } 1068 1069 if ((result = kaweth_download_firmware(kaweth, 1070 "kaweth/trigger_code.bin", 1071 126, 1072 2)) < 0) { 1073 dev_err(dev, "Error downloading trigger code (%d)\n", 1074 result); 1075 goto err_fw; 1076 1077 } 1078 1079 if ((result = kaweth_download_firmware(kaweth, 1080 "kaweth/trigger_code_fix.bin", 1081 126, 1082 3)) < 0) { 1083 dev_err(dev, "Error downloading trigger code fix (%d)\n", result); 1084 goto err_fw; 1085 } 1086 1087 1088 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) { 1089 dev_err(dev, "Error triggering firmware (%d)\n", result); 1090 goto err_fw; 1091 } 1092 1093 /* Device will now disappear for a moment... */ 1094 dev_info(dev, "Firmware loaded. I'll be back...\n"); 1095 err_fw: 1096 free_page((unsigned long)kaweth->firmware_buf); 1097 free_netdev(netdev); 1098 return -EIO; 1099 } 1100 1101 result = kaweth_read_configuration(kaweth); 1102 1103 if(result < 0) { 1104 dev_err(dev, "Error reading configuration (%d), no net device created\n", result); 1105 goto err_free_netdev; 1106 } 1107 1108 dev_info(dev, "Statistics collection: %x\n", kaweth->configuration.statistics_mask); 1109 dev_info(dev, "Multicast filter limit: %x\n", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1)); 1110 dev_info(dev, "MTU: %d\n", le16_to_cpu(kaweth->configuration.segment_size)); 1111 dev_info(dev, "Read MAC address %pM\n", kaweth->configuration.hw_addr); 1112 1113 if(!memcmp(&kaweth->configuration.hw_addr, 1114 &bcast_addr, 1115 sizeof(bcast_addr))) { 1116 dev_err(dev, "Firmware not functioning properly, no net device created\n"); 1117 goto err_free_netdev; 1118 } 1119 1120 if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) { 1121 dev_dbg(dev, "Error setting URB size\n"); 1122 goto err_free_netdev; 1123 } 1124 1125 if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) { 1126 dev_err(dev, "Error setting SOFS wait\n"); 1127 goto err_free_netdev; 1128 } 1129 1130 result = kaweth_set_receive_filter(kaweth, 1131 KAWETH_PACKET_FILTER_DIRECTED | 1132 KAWETH_PACKET_FILTER_BROADCAST | 1133 KAWETH_PACKET_FILTER_MULTICAST); 1134 1135 if(result < 0) { 1136 dev_err(dev, "Error setting receive filter\n"); 1137 goto err_free_netdev; 1138 } 1139 1140 dev_dbg(dev, "Initializing net device.\n"); 1141 1142 kaweth->intf = intf; 1143 1144 kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 1145 if (!kaweth->tx_urb) 1146 goto err_free_netdev; 1147 kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL); 1148 if (!kaweth->rx_urb) 1149 goto err_only_tx; 1150 kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL); 1151 if (!kaweth->irq_urb) 1152 goto err_tx_and_rx; 1153 1154 kaweth->intbuffer = usb_alloc_coherent( kaweth->dev, 1155 INTBUFFERSIZE, 1156 GFP_KERNEL, 1157 &kaweth->intbufferhandle); 1158 if (!kaweth->intbuffer) 1159 goto err_tx_and_rx_and_irq; 1160 kaweth->rx_buf = usb_alloc_coherent( kaweth->dev, 1161 KAWETH_BUF_SIZE, 1162 GFP_KERNEL, 1163 &kaweth->rxbufferhandle); 1164 if (!kaweth->rx_buf) 1165 goto err_all_but_rxbuf; 1166 1167 memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr)); 1168 memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr, 1169 sizeof(kaweth->configuration.hw_addr)); 1170 1171 netdev->netdev_ops = &kaweth_netdev_ops; 1172 netdev->watchdog_timeo = KAWETH_TX_TIMEOUT; 1173 netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size); 1174 netdev->ethtool_ops = &ops; 1175 1176 /* kaweth is zeroed as part of alloc_netdev */ 1177 INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl); 1178 usb_set_intfdata(intf, kaweth); 1179 1180 #if 0 1181 // dma_supported() is deeply broken on almost all architectures 1182 if (dma_supported (dev, 0xffffffffffffffffULL)) 1183 kaweth->net->features |= NETIF_F_HIGHDMA; 1184 #endif 1185 1186 SET_NETDEV_DEV(netdev, dev); 1187 if (register_netdev(netdev) != 0) { 1188 dev_err(dev, "Error registering netdev.\n"); 1189 goto err_intfdata; 1190 } 1191 1192 dev_info(dev, "kaweth interface created at %s\n", 1193 kaweth->net->name); 1194 1195 dev_dbg(dev, "Kaweth probe returning.\n"); 1196 1197 return 0; 1198 1199 err_intfdata: 1200 usb_set_intfdata(intf, NULL); 1201 usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle); 1202 err_all_but_rxbuf: 1203 usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle); 1204 err_tx_and_rx_and_irq: 1205 usb_free_urb(kaweth->irq_urb); 1206 err_tx_and_rx: 1207 usb_free_urb(kaweth->rx_urb); 1208 err_only_tx: 1209 usb_free_urb(kaweth->tx_urb); 1210 err_free_netdev: 1211 free_netdev(netdev); 1212 1213 return -EIO; 1214 } 1215 1216 /**************************************************************** 1217 * kaweth_disconnect 1218 ****************************************************************/ 1219 static void kaweth_disconnect(struct usb_interface *intf) 1220 { 1221 struct kaweth_device *kaweth = usb_get_intfdata(intf); 1222 struct net_device *netdev; 1223 1224 dev_info(&intf->dev, "Unregistering\n"); 1225 1226 usb_set_intfdata(intf, NULL); 1227 if (!kaweth) { 1228 dev_warn(&intf->dev, "unregistering non-existent device\n"); 1229 return; 1230 } 1231 netdev = kaweth->net; 1232 1233 netdev_dbg(kaweth->net, "Unregistering net device\n"); 1234 unregister_netdev(netdev); 1235 1236 usb_free_urb(kaweth->rx_urb); 1237 usb_free_urb(kaweth->tx_urb); 1238 usb_free_urb(kaweth->irq_urb); 1239 1240 usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle); 1241 usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle); 1242 1243 free_netdev(netdev); 1244 } 1245 1246 1247 // FIXME this completion stuff is a modified clone of 1248 // an OLD version of some stuff in usb.c ... 1249 struct usb_api_data { 1250 wait_queue_head_t wqh; 1251 int done; 1252 }; 1253 1254 /*-------------------------------------------------------------------* 1255 * completion handler for compatibility wrappers (sync control/bulk) * 1256 *-------------------------------------------------------------------*/ 1257 static void usb_api_blocking_completion(struct urb *urb) 1258 { 1259 struct usb_api_data *awd = (struct usb_api_data *)urb->context; 1260 1261 awd->done=1; 1262 wake_up(&awd->wqh); 1263 } 1264 1265 /*-------------------------------------------------------------------* 1266 * COMPATIBILITY STUFF * 1267 *-------------------------------------------------------------------*/ 1268 1269 // Starts urb and waits for completion or timeout 1270 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length) 1271 { 1272 struct usb_api_data awd; 1273 int status; 1274 1275 init_waitqueue_head(&awd.wqh); 1276 awd.done = 0; 1277 1278 urb->context = &awd; 1279 status = usb_submit_urb(urb, GFP_ATOMIC); 1280 if (status) { 1281 // something went wrong 1282 usb_free_urb(urb); 1283 return status; 1284 } 1285 1286 if (!wait_event_timeout(awd.wqh, awd.done, timeout)) { 1287 // timeout 1288 dev_warn(&urb->dev->dev, "usb_control/bulk_msg: timeout\n"); 1289 usb_kill_urb(urb); // remove urb safely 1290 status = -ETIMEDOUT; 1291 } 1292 else { 1293 status = urb->status; 1294 } 1295 1296 if (actual_length) { 1297 *actual_length = urb->actual_length; 1298 } 1299 1300 usb_free_urb(urb); 1301 return status; 1302 } 1303 1304 /*-------------------------------------------------------------------*/ 1305 // returns status (negative) or length (positive) 1306 static int kaweth_internal_control_msg(struct usb_device *usb_dev, 1307 unsigned int pipe, 1308 struct usb_ctrlrequest *cmd, void *data, 1309 int len, int timeout) 1310 { 1311 struct urb *urb; 1312 int retv; 1313 int length = 0; /* shut up GCC */ 1314 1315 urb = usb_alloc_urb(0, GFP_ATOMIC); 1316 if (!urb) 1317 return -ENOMEM; 1318 1319 usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data, 1320 len, usb_api_blocking_completion, NULL); 1321 1322 retv = usb_start_wait_urb(urb, timeout, &length); 1323 if (retv < 0) { 1324 return retv; 1325 } 1326 else { 1327 return length; 1328 } 1329 } 1330 1331 module_usb_driver(kaweth_driver); 1332