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 * Fix in_interrupt() problem 35 * Develop test procedures for USB net interfaces 36 * Run test procedures 37 * Fix bugs from previous two steps 38 * Snoop other OSs for any tricks we're not doing 39 * SMP locking 40 * Reduce arbitrary timeouts 41 * Smart multicast support 42 * Temporary MAC change support 43 * Tunable SOFs parameter - ioctl()? 44 * Ethernet stats collection 45 * Code formatting improvements 46 */ 47 48 #include <linux/module.h> 49 #include <linux/slab.h> 50 #include <linux/string.h> 51 #include <linux/init.h> 52 #include <linux/delay.h> 53 #include <linux/netdevice.h> 54 #include <linux/etherdevice.h> 55 #include <linux/usb.h> 56 #include <linux/types.h> 57 #include <linux/ethtool.h> 58 #include <linux/dma-mapping.h> 59 #include <linux/wait.h> 60 #include <linux/firmware.h> 61 #include <asm/uaccess.h> 62 #include <asm/byteorder.h> 63 64 #undef DEBUG 65 66 #define KAWETH_MTU 1514 67 #define KAWETH_BUF_SIZE 1664 68 #define KAWETH_TX_TIMEOUT (5 * HZ) 69 #define KAWETH_SCRATCH_SIZE 32 70 #define KAWETH_FIRMWARE_BUF_SIZE 4096 71 #define KAWETH_CONTROL_TIMEOUT (30000) 72 73 #define KAWETH_STATUS_BROKEN 0x0000001 74 #define KAWETH_STATUS_CLOSING 0x0000002 75 #define KAWETH_STATUS_SUSPENDING 0x0000004 76 77 #define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING) 78 79 #define KAWETH_PACKET_FILTER_PROMISCUOUS 0x01 80 #define KAWETH_PACKET_FILTER_ALL_MULTICAST 0x02 81 #define KAWETH_PACKET_FILTER_DIRECTED 0x04 82 #define KAWETH_PACKET_FILTER_BROADCAST 0x08 83 #define KAWETH_PACKET_FILTER_MULTICAST 0x10 84 85 /* Table 7 */ 86 #define KAWETH_COMMAND_GET_ETHERNET_DESC 0x00 87 #define KAWETH_COMMAND_MULTICAST_FILTERS 0x01 88 #define KAWETH_COMMAND_SET_PACKET_FILTER 0x02 89 #define KAWETH_COMMAND_STATISTICS 0x03 90 #define KAWETH_COMMAND_SET_TEMP_MAC 0x06 91 #define KAWETH_COMMAND_GET_TEMP_MAC 0x07 92 #define KAWETH_COMMAND_SET_URB_SIZE 0x08 93 #define KAWETH_COMMAND_SET_SOFS_WAIT 0x09 94 #define KAWETH_COMMAND_SCAN 0xFF 95 96 #define KAWETH_SOFS_TO_WAIT 0x05 97 98 #define INTBUFFERSIZE 4 99 100 #define STATE_OFFSET 0 101 #define STATE_MASK 0x40 102 #define STATE_SHIFT 5 103 104 #define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED) 105 106 107 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>"); 108 MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver"); 109 MODULE_LICENSE("GPL"); 110 MODULE_FIRMWARE("kaweth/new_code.bin"); 111 MODULE_FIRMWARE("kaweth/new_code_fix.bin"); 112 MODULE_FIRMWARE("kaweth/trigger_code.bin"); 113 MODULE_FIRMWARE("kaweth/trigger_code_fix.bin"); 114 115 static const char driver_name[] = "kaweth"; 116 117 static int kaweth_probe( 118 struct usb_interface *intf, 119 const struct usb_device_id *id /* from id_table */ 120 ); 121 static void kaweth_disconnect(struct usb_interface *intf); 122 static int kaweth_internal_control_msg(struct usb_device *usb_dev, 123 unsigned int pipe, 124 struct usb_ctrlrequest *cmd, void *data, 125 int len, int timeout); 126 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message); 127 static int kaweth_resume(struct usb_interface *intf); 128 129 /**************************************************************** 130 * usb_device_id 131 ****************************************************************/ 132 static struct usb_device_id usb_klsi_table[] = { 133 { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */ 134 { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */ 135 { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */ 136 { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */ 137 { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */ 138 { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */ 139 { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */ 140 { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */ 141 { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */ 142 { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */ 143 { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */ 144 { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */ 145 { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */ 146 { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */ 147 { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */ 148 { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */ 149 { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */ 150 { USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */ 151 { USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */ 152 { USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */ 153 { USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */ 154 { USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */ 155 { USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */ 156 { USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */ 157 { USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */ 158 { USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */ 159 { USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */ 160 { USB_DEVICE(0x1485, 0x0001) }, /* Silicom U2E */ 161 { USB_DEVICE(0x1485, 0x0002) }, /* Psion Dacom Gold Port Ethernet */ 162 { USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */ 163 { USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */ 164 { USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */ 165 { USB_DEVICE(0x1668, 0x0323) }, /* Actiontec USB Ethernet */ 166 { USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */ 167 {} /* Null terminator */ 168 }; 169 170 MODULE_DEVICE_TABLE (usb, usb_klsi_table); 171 172 /**************************************************************** 173 * kaweth_driver 174 ****************************************************************/ 175 static struct usb_driver kaweth_driver = { 176 .name = driver_name, 177 .probe = kaweth_probe, 178 .disconnect = kaweth_disconnect, 179 .suspend = kaweth_suspend, 180 .resume = kaweth_resume, 181 .id_table = usb_klsi_table, 182 .supports_autosuspend = 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 } __attribute__ ((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; 268 269 dbg("kaweth_control()"); 270 271 if(in_interrupt()) { 272 dbg("in_interrupt()"); 273 return -EBUSY; 274 } 275 276 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC); 277 278 if (!dr) { 279 dbg("kmalloc() failed"); 280 return -ENOMEM; 281 } 282 283 dr->bRequestType= requesttype; 284 dr->bRequest = request; 285 dr->wValue = cpu_to_le16(value); 286 dr->wIndex = cpu_to_le16(index); 287 dr->wLength = cpu_to_le16(size); 288 289 return kaweth_internal_control_msg(kaweth->dev, 290 pipe, 291 dr, 292 data, 293 size, 294 timeout); 295 } 296 297 /**************************************************************** 298 * kaweth_read_configuration 299 ****************************************************************/ 300 static int kaweth_read_configuration(struct kaweth_device *kaweth) 301 { 302 int retval; 303 304 dbg("Reading kaweth configuration"); 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 dbg("Setting URB size to %d", (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 dbg("Set SOFS wait to %d", (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 dbg("Set receive filter to %d", (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 err("Firmware request failed\n"); 401 return ret; 402 } 403 404 if (fw->size > KAWETH_FIRMWARE_BUF_SIZE) { 405 err("Firmware too big: %zu", fw->size); 406 return -ENOSPC; 407 } 408 data_len = fw->size; 409 memcpy(kaweth->firmware_buf, fw->data, fw->size); 410 411 release_firmware(fw); 412 413 kaweth->firmware_buf[2] = (data_len & 0xFF) - 7; 414 kaweth->firmware_buf[3] = data_len >> 8; 415 kaweth->firmware_buf[4] = type; 416 kaweth->firmware_buf[5] = interrupt; 417 418 dbg("High: %i, Low:%i", kaweth->firmware_buf[3], 419 kaweth->firmware_buf[2]); 420 421 dbg("Downloading firmware at %p to kaweth device at %p", 422 fw->data, kaweth); 423 dbg("Firmware length: %d", data_len); 424 425 return kaweth_control(kaweth, 426 usb_sndctrlpipe(kaweth->dev, 0), 427 KAWETH_COMMAND_SCAN, 428 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 429 0, 430 0, 431 (void *)kaweth->firmware_buf, 432 data_len, 433 KAWETH_CONTROL_TIMEOUT); 434 } 435 436 /**************************************************************** 437 * kaweth_trigger_firmware 438 ****************************************************************/ 439 static int kaweth_trigger_firmware(struct kaweth_device *kaweth, 440 __u8 interrupt) 441 { 442 kaweth->firmware_buf[0] = 0xB6; 443 kaweth->firmware_buf[1] = 0xC3; 444 kaweth->firmware_buf[2] = 0x01; 445 kaweth->firmware_buf[3] = 0x00; 446 kaweth->firmware_buf[4] = 0x06; 447 kaweth->firmware_buf[5] = interrupt; 448 kaweth->firmware_buf[6] = 0x00; 449 kaweth->firmware_buf[7] = 0x00; 450 451 dbg("Triggering firmware"); 452 453 return kaweth_control(kaweth, 454 usb_sndctrlpipe(kaweth->dev, 0), 455 KAWETH_COMMAND_SCAN, 456 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 457 0, 458 0, 459 (void *)kaweth->firmware_buf, 460 8, 461 KAWETH_CONTROL_TIMEOUT); 462 } 463 464 /**************************************************************** 465 * kaweth_reset 466 ****************************************************************/ 467 static int kaweth_reset(struct kaweth_device *kaweth) 468 { 469 int result; 470 471 dbg("kaweth_reset(%p)", kaweth); 472 result = kaweth_control(kaweth, 473 usb_sndctrlpipe(kaweth->dev, 0), 474 USB_REQ_SET_CONFIGURATION, 475 0, 476 kaweth->dev->config[0].desc.bConfigurationValue, 477 0, 478 NULL, 479 0, 480 KAWETH_CONTROL_TIMEOUT); 481 482 mdelay(10); 483 484 dbg("kaweth_reset() returns %d.",result); 485 486 return result; 487 } 488 489 static void kaweth_usb_receive(struct urb *); 490 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t); 491 492 /**************************************************************** 493 int_callback 494 *****************************************************************/ 495 496 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf) 497 { 498 int status; 499 500 status = usb_submit_urb (kaweth->irq_urb, mf); 501 if (unlikely(status == -ENOMEM)) { 502 kaweth->suspend_lowmem_ctrl = 1; 503 schedule_delayed_work(&kaweth->lowmem_work, HZ/4); 504 } else { 505 kaweth->suspend_lowmem_ctrl = 0; 506 } 507 508 if (status) 509 err ("can't resubmit intr, %s-%s, status %d", 510 kaweth->dev->bus->bus_name, 511 kaweth->dev->devpath, status); 512 } 513 514 static void int_callback(struct urb *u) 515 { 516 struct kaweth_device *kaweth = u->context; 517 int act_state; 518 int status = u->status; 519 520 switch (status) { 521 case 0: /* success */ 522 break; 523 case -ECONNRESET: /* unlink */ 524 case -ENOENT: 525 case -ESHUTDOWN: 526 return; 527 /* -EPIPE: should clear the halt */ 528 default: /* error */ 529 goto resubmit; 530 } 531 532 /* we check the link state to report changes */ 533 if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) { 534 if (act_state) 535 netif_carrier_on(kaweth->net); 536 else 537 netif_carrier_off(kaweth->net); 538 539 kaweth->linkstate = act_state; 540 } 541 resubmit: 542 kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC); 543 } 544 545 static void kaweth_resubmit_tl(struct work_struct *work) 546 { 547 struct kaweth_device *kaweth = 548 container_of(work, struct kaweth_device, lowmem_work.work); 549 550 if (IS_BLOCKED(kaweth->status)) 551 return; 552 553 if (kaweth->suspend_lowmem_rx) 554 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO); 555 556 if (kaweth->suspend_lowmem_ctrl) 557 kaweth_resubmit_int_urb(kaweth, GFP_NOIO); 558 } 559 560 561 /**************************************************************** 562 * kaweth_resubmit_rx_urb 563 ****************************************************************/ 564 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth, 565 gfp_t mem_flags) 566 { 567 int result; 568 569 usb_fill_bulk_urb(kaweth->rx_urb, 570 kaweth->dev, 571 usb_rcvbulkpipe(kaweth->dev, 1), 572 kaweth->rx_buf, 573 KAWETH_BUF_SIZE, 574 kaweth_usb_receive, 575 kaweth); 576 kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 577 kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle; 578 579 if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) { 580 if (result == -ENOMEM) { 581 kaweth->suspend_lowmem_rx = 1; 582 schedule_delayed_work(&kaweth->lowmem_work, HZ/4); 583 } 584 err("resubmitting rx_urb %d failed", result); 585 } else { 586 kaweth->suspend_lowmem_rx = 0; 587 } 588 589 return result; 590 } 591 592 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth); 593 594 /**************************************************************** 595 * kaweth_usb_receive 596 ****************************************************************/ 597 static void kaweth_usb_receive(struct urb *urb) 598 { 599 struct kaweth_device *kaweth = urb->context; 600 struct net_device *net = kaweth->net; 601 int status = urb->status; 602 603 int count = urb->actual_length; 604 int count2 = urb->transfer_buffer_length; 605 606 __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf); 607 608 struct sk_buff *skb; 609 610 if(unlikely(status == -ECONNRESET || status == -ESHUTDOWN)) 611 /* we are killed - set a flag and wake the disconnect handler */ 612 { 613 kaweth->end = 1; 614 wake_up(&kaweth->term_wait); 615 return; 616 } 617 618 spin_lock(&kaweth->device_lock); 619 if (IS_BLOCKED(kaweth->status)) { 620 spin_unlock(&kaweth->device_lock); 621 return; 622 } 623 spin_unlock(&kaweth->device_lock); 624 625 if(status && status != -EREMOTEIO && count != 1) { 626 err("%s RX status: %d count: %d packet_len: %d", 627 net->name, 628 status, 629 count, 630 (int)pkt_len); 631 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 632 return; 633 } 634 635 if(kaweth->net && (count > 2)) { 636 if(pkt_len > (count - 2)) { 637 err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count); 638 err("Packet len & 2047: %x", pkt_len & 2047); 639 err("Count 2: %x", count2); 640 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 641 return; 642 } 643 644 if(!(skb = dev_alloc_skb(pkt_len+2))) { 645 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 646 return; 647 } 648 649 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */ 650 651 skb_copy_to_linear_data(skb, kaweth->rx_buf + 2, pkt_len); 652 653 skb_put(skb, pkt_len); 654 655 skb->protocol = eth_type_trans(skb, net); 656 657 netif_rx(skb); 658 659 kaweth->stats.rx_packets++; 660 kaweth->stats.rx_bytes += pkt_len; 661 } 662 663 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 664 } 665 666 /**************************************************************** 667 * kaweth_open 668 ****************************************************************/ 669 static int kaweth_open(struct net_device *net) 670 { 671 struct kaweth_device *kaweth = netdev_priv(net); 672 int res; 673 674 dbg("Opening network device."); 675 676 res = usb_autopm_get_interface(kaweth->intf); 677 if (res) { 678 err("Interface cannot be resumed."); 679 return -EIO; 680 } 681 res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL); 682 if (res) 683 goto err_out; 684 685 usb_fill_int_urb( 686 kaweth->irq_urb, 687 kaweth->dev, 688 usb_rcvintpipe(kaweth->dev, 3), 689 kaweth->intbuffer, 690 INTBUFFERSIZE, 691 int_callback, 692 kaweth, 693 250); /* overriding the descriptor */ 694 kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle; 695 kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 696 697 res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL); 698 if (res) { 699 usb_kill_urb(kaweth->rx_urb); 700 goto err_out; 701 } 702 kaweth->opened = 1; 703 704 netif_start_queue(net); 705 706 kaweth_async_set_rx_mode(kaweth); 707 return 0; 708 709 err_out: 710 usb_autopm_enable(kaweth->intf); 711 return -EIO; 712 } 713 714 /**************************************************************** 715 * kaweth_kill_urbs 716 ****************************************************************/ 717 static void kaweth_kill_urbs(struct kaweth_device *kaweth) 718 { 719 usb_kill_urb(kaweth->irq_urb); 720 usb_kill_urb(kaweth->rx_urb); 721 usb_kill_urb(kaweth->tx_urb); 722 723 cancel_delayed_work_sync(&kaweth->lowmem_work); 724 725 /* a scheduled work may have resubmitted, 726 we hit them again */ 727 usb_kill_urb(kaweth->irq_urb); 728 usb_kill_urb(kaweth->rx_urb); 729 } 730 731 /**************************************************************** 732 * kaweth_close 733 ****************************************************************/ 734 static int kaweth_close(struct net_device *net) 735 { 736 struct kaweth_device *kaweth = netdev_priv(net); 737 738 netif_stop_queue(net); 739 kaweth->opened = 0; 740 741 kaweth->status |= KAWETH_STATUS_CLOSING; 742 743 kaweth_kill_urbs(kaweth); 744 745 kaweth->status &= ~KAWETH_STATUS_CLOSING; 746 747 usb_autopm_enable(kaweth->intf); 748 749 return 0; 750 } 751 752 static void kaweth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) 753 { 754 struct kaweth_device *kaweth = netdev_priv(dev); 755 756 strlcpy(info->driver, driver_name, sizeof(info->driver)); 757 usb_make_path(kaweth->dev, info->bus_info, sizeof (info->bus_info)); 758 } 759 760 static u32 kaweth_get_link(struct net_device *dev) 761 { 762 struct kaweth_device *kaweth = netdev_priv(dev); 763 764 return kaweth->linkstate; 765 } 766 767 static struct ethtool_ops ops = { 768 .get_drvinfo = kaweth_get_drvinfo, 769 .get_link = kaweth_get_link 770 }; 771 772 /**************************************************************** 773 * kaweth_usb_transmit_complete 774 ****************************************************************/ 775 static void kaweth_usb_transmit_complete(struct urb *urb) 776 { 777 struct kaweth_device *kaweth = urb->context; 778 struct sk_buff *skb = kaweth->tx_skb; 779 int status = urb->status; 780 781 if (unlikely(status != 0)) 782 if (status != -ENOENT) 783 dbg("%s: TX status %d.", kaweth->net->name, status); 784 785 netif_wake_queue(kaweth->net); 786 dev_kfree_skb_irq(skb); 787 } 788 789 /**************************************************************** 790 * kaweth_start_xmit 791 ****************************************************************/ 792 static int kaweth_start_xmit(struct sk_buff *skb, struct net_device *net) 793 { 794 struct kaweth_device *kaweth = netdev_priv(net); 795 __le16 *private_header; 796 797 int res; 798 799 spin_lock(&kaweth->device_lock); 800 801 kaweth_async_set_rx_mode(kaweth); 802 netif_stop_queue(net); 803 if (IS_BLOCKED(kaweth->status)) { 804 goto skip; 805 } 806 807 /* We now decide whether we can put our special header into the sk_buff */ 808 if (skb_cloned(skb) || skb_headroom(skb) < 2) { 809 /* no such luck - we make our own */ 810 struct sk_buff *copied_skb; 811 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC); 812 dev_kfree_skb_irq(skb); 813 skb = copied_skb; 814 if (!copied_skb) { 815 kaweth->stats.tx_errors++; 816 netif_start_queue(net); 817 spin_unlock(&kaweth->device_lock); 818 return 0; 819 } 820 } 821 822 private_header = (__le16 *)__skb_push(skb, 2); 823 *private_header = cpu_to_le16(skb->len-2); 824 kaweth->tx_skb = skb; 825 826 usb_fill_bulk_urb(kaweth->tx_urb, 827 kaweth->dev, 828 usb_sndbulkpipe(kaweth->dev, 2), 829 private_header, 830 skb->len, 831 kaweth_usb_transmit_complete, 832 kaweth); 833 kaweth->end = 0; 834 835 if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC))) 836 { 837 dev_warn(&net->dev, "kaweth failed tx_urb %d\n", res); 838 skip: 839 kaweth->stats.tx_errors++; 840 841 netif_start_queue(net); 842 dev_kfree_skb_irq(skb); 843 } 844 else 845 { 846 kaweth->stats.tx_packets++; 847 kaweth->stats.tx_bytes += skb->len; 848 net->trans_start = jiffies; 849 } 850 851 spin_unlock(&kaweth->device_lock); 852 853 return 0; 854 } 855 856 /**************************************************************** 857 * kaweth_set_rx_mode 858 ****************************************************************/ 859 static void kaweth_set_rx_mode(struct net_device *net) 860 { 861 struct kaweth_device *kaweth = netdev_priv(net); 862 863 __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED | 864 KAWETH_PACKET_FILTER_BROADCAST | 865 KAWETH_PACKET_FILTER_MULTICAST; 866 867 dbg("Setting Rx mode to %d", packet_filter_bitmap); 868 869 netif_stop_queue(net); 870 871 if (net->flags & IFF_PROMISC) { 872 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS; 873 } 874 else if ((net->mc_count) || (net->flags & IFF_ALLMULTI)) { 875 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST; 876 } 877 878 kaweth->packet_filter_bitmap = packet_filter_bitmap; 879 netif_wake_queue(net); 880 } 881 882 /**************************************************************** 883 * kaweth_async_set_rx_mode 884 ****************************************************************/ 885 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth) 886 { 887 __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap; 888 kaweth->packet_filter_bitmap = 0; 889 if (packet_filter_bitmap == 0) 890 return; 891 892 { 893 int result; 894 result = kaweth_control(kaweth, 895 usb_sndctrlpipe(kaweth->dev, 0), 896 KAWETH_COMMAND_SET_PACKET_FILTER, 897 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 898 packet_filter_bitmap, 899 0, 900 (void *)&kaweth->scratch, 901 0, 902 KAWETH_CONTROL_TIMEOUT); 903 904 if(result < 0) { 905 err("Failed to set Rx mode: %d", result); 906 } 907 else { 908 dbg("Set Rx mode to %d", packet_filter_bitmap); 909 } 910 } 911 } 912 913 /**************************************************************** 914 * kaweth_netdev_stats 915 ****************************************************************/ 916 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev) 917 { 918 struct kaweth_device *kaweth = netdev_priv(dev); 919 return &kaweth->stats; 920 } 921 922 /**************************************************************** 923 * kaweth_tx_timeout 924 ****************************************************************/ 925 static void kaweth_tx_timeout(struct net_device *net) 926 { 927 struct kaweth_device *kaweth = netdev_priv(net); 928 929 dev_warn(&net->dev, "%s: Tx timed out. Resetting.\n", net->name); 930 kaweth->stats.tx_errors++; 931 net->trans_start = jiffies; 932 933 usb_unlink_urb(kaweth->tx_urb); 934 } 935 936 /**************************************************************** 937 * kaweth_suspend 938 ****************************************************************/ 939 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message) 940 { 941 struct kaweth_device *kaweth = usb_get_intfdata(intf); 942 unsigned long flags; 943 944 dbg("Suspending device"); 945 spin_lock_irqsave(&kaweth->device_lock, flags); 946 kaweth->status |= KAWETH_STATUS_SUSPENDING; 947 spin_unlock_irqrestore(&kaweth->device_lock, flags); 948 949 kaweth_kill_urbs(kaweth); 950 return 0; 951 } 952 953 /**************************************************************** 954 * kaweth_resume 955 ****************************************************************/ 956 static int kaweth_resume(struct usb_interface *intf) 957 { 958 struct kaweth_device *kaweth = usb_get_intfdata(intf); 959 unsigned long flags; 960 961 dbg("Resuming device"); 962 spin_lock_irqsave(&kaweth->device_lock, flags); 963 kaweth->status &= ~KAWETH_STATUS_SUSPENDING; 964 spin_unlock_irqrestore(&kaweth->device_lock, flags); 965 966 if (!kaweth->opened) 967 return 0; 968 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO); 969 kaweth_resubmit_int_urb(kaweth, GFP_NOIO); 970 971 return 0; 972 } 973 974 /**************************************************************** 975 * kaweth_probe 976 ****************************************************************/ 977 978 979 static const struct net_device_ops kaweth_netdev_ops = { 980 .ndo_open = kaweth_open, 981 .ndo_stop = kaweth_close, 982 .ndo_start_xmit = kaweth_start_xmit, 983 .ndo_tx_timeout = kaweth_tx_timeout, 984 .ndo_set_multicast_list = kaweth_set_rx_mode, 985 .ndo_get_stats = kaweth_netdev_stats, 986 }; 987 988 static int kaweth_probe( 989 struct usb_interface *intf, 990 const struct usb_device_id *id /* from id_table */ 991 ) 992 { 993 struct usb_device *dev = interface_to_usbdev(intf); 994 struct kaweth_device *kaweth; 995 struct net_device *netdev; 996 const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; 997 int result = 0; 998 999 dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x", 1000 dev->devnum, 1001 le16_to_cpu(dev->descriptor.idVendor), 1002 le16_to_cpu(dev->descriptor.idProduct), 1003 le16_to_cpu(dev->descriptor.bcdDevice)); 1004 1005 dbg("Device at %p", dev); 1006 1007 dbg("Descriptor length: %x type: %x", 1008 (int)dev->descriptor.bLength, 1009 (int)dev->descriptor.bDescriptorType); 1010 1011 netdev = alloc_etherdev(sizeof(*kaweth)); 1012 if (!netdev) 1013 return -ENOMEM; 1014 1015 kaweth = netdev_priv(netdev); 1016 kaweth->dev = dev; 1017 kaweth->net = netdev; 1018 1019 spin_lock_init(&kaweth->device_lock); 1020 init_waitqueue_head(&kaweth->term_wait); 1021 1022 dbg("Resetting."); 1023 1024 kaweth_reset(kaweth); 1025 1026 /* 1027 * If high byte of bcdDevice is nonzero, firmware is already 1028 * downloaded. Don't try to do it again, or we'll hang the device. 1029 */ 1030 1031 if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) { 1032 dev_info(&intf->dev, "Firmware present in device.\n"); 1033 } else { 1034 /* Download the firmware */ 1035 dev_info(&intf->dev, "Downloading firmware...\n"); 1036 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL); 1037 if ((result = kaweth_download_firmware(kaweth, 1038 "kaweth/new_code.bin", 1039 100, 1040 2)) < 0) { 1041 err("Error downloading firmware (%d)", result); 1042 goto err_fw; 1043 } 1044 1045 if ((result = kaweth_download_firmware(kaweth, 1046 "kaweth/new_code_fix.bin", 1047 100, 1048 3)) < 0) { 1049 err("Error downloading firmware fix (%d)", result); 1050 goto err_fw; 1051 } 1052 1053 if ((result = kaweth_download_firmware(kaweth, 1054 "kaweth/trigger_code.bin", 1055 126, 1056 2)) < 0) { 1057 err("Error downloading trigger code (%d)", result); 1058 goto err_fw; 1059 1060 } 1061 1062 if ((result = kaweth_download_firmware(kaweth, 1063 "kaweth/trigger_code_fix.bin", 1064 126, 1065 3)) < 0) { 1066 err("Error downloading trigger code fix (%d)", result); 1067 goto err_fw; 1068 } 1069 1070 1071 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) { 1072 err("Error triggering firmware (%d)", result); 1073 goto err_fw; 1074 } 1075 1076 /* Device will now disappear for a moment... */ 1077 dev_info(&intf->dev, "Firmware loaded. I'll be back...\n"); 1078 err_fw: 1079 free_page((unsigned long)kaweth->firmware_buf); 1080 free_netdev(netdev); 1081 return -EIO; 1082 } 1083 1084 result = kaweth_read_configuration(kaweth); 1085 1086 if(result < 0) { 1087 err("Error reading configuration (%d), no net device created", result); 1088 goto err_free_netdev; 1089 } 1090 1091 dev_info(&intf->dev, "Statistics collection: %x\n", kaweth->configuration.statistics_mask); 1092 dev_info(&intf->dev, "Multicast filter limit: %x\n", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1)); 1093 dev_info(&intf->dev, "MTU: %d\n", le16_to_cpu(kaweth->configuration.segment_size)); 1094 dev_info(&intf->dev, "Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n", 1095 (int)kaweth->configuration.hw_addr[0], 1096 (int)kaweth->configuration.hw_addr[1], 1097 (int)kaweth->configuration.hw_addr[2], 1098 (int)kaweth->configuration.hw_addr[3], 1099 (int)kaweth->configuration.hw_addr[4], 1100 (int)kaweth->configuration.hw_addr[5]); 1101 1102 if(!memcmp(&kaweth->configuration.hw_addr, 1103 &bcast_addr, 1104 sizeof(bcast_addr))) { 1105 err("Firmware not functioning properly, no net device created"); 1106 goto err_free_netdev; 1107 } 1108 1109 if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) { 1110 dbg("Error setting URB size"); 1111 goto err_free_netdev; 1112 } 1113 1114 if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) { 1115 err("Error setting SOFS wait"); 1116 goto err_free_netdev; 1117 } 1118 1119 result = kaweth_set_receive_filter(kaweth, 1120 KAWETH_PACKET_FILTER_DIRECTED | 1121 KAWETH_PACKET_FILTER_BROADCAST | 1122 KAWETH_PACKET_FILTER_MULTICAST); 1123 1124 if(result < 0) { 1125 err("Error setting receive filter"); 1126 goto err_free_netdev; 1127 } 1128 1129 dbg("Initializing net device."); 1130 1131 kaweth->intf = intf; 1132 1133 kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 1134 if (!kaweth->tx_urb) 1135 goto err_free_netdev; 1136 kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL); 1137 if (!kaweth->rx_urb) 1138 goto err_only_tx; 1139 kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL); 1140 if (!kaweth->irq_urb) 1141 goto err_tx_and_rx; 1142 1143 kaweth->intbuffer = usb_buffer_alloc( kaweth->dev, 1144 INTBUFFERSIZE, 1145 GFP_KERNEL, 1146 &kaweth->intbufferhandle); 1147 if (!kaweth->intbuffer) 1148 goto err_tx_and_rx_and_irq; 1149 kaweth->rx_buf = usb_buffer_alloc( kaweth->dev, 1150 KAWETH_BUF_SIZE, 1151 GFP_KERNEL, 1152 &kaweth->rxbufferhandle); 1153 if (!kaweth->rx_buf) 1154 goto err_all_but_rxbuf; 1155 1156 memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr)); 1157 memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr, 1158 sizeof(kaweth->configuration.hw_addr)); 1159 1160 netdev->netdev_ops = &kaweth_netdev_ops; 1161 netdev->watchdog_timeo = KAWETH_TX_TIMEOUT; 1162 netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size); 1163 SET_ETHTOOL_OPS(netdev, &ops); 1164 1165 /* kaweth is zeroed as part of alloc_netdev */ 1166 INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl); 1167 usb_set_intfdata(intf, kaweth); 1168 1169 #if 0 1170 // dma_supported() is deeply broken on almost all architectures 1171 if (dma_supported (&intf->dev, 0xffffffffffffffffULL)) 1172 kaweth->net->features |= NETIF_F_HIGHDMA; 1173 #endif 1174 1175 SET_NETDEV_DEV(netdev, &intf->dev); 1176 if (register_netdev(netdev) != 0) { 1177 err("Error registering netdev."); 1178 goto err_intfdata; 1179 } 1180 1181 dev_info(&intf->dev, "kaweth interface created at %s\n", 1182 kaweth->net->name); 1183 1184 dbg("Kaweth probe returning."); 1185 1186 return 0; 1187 1188 err_intfdata: 1189 usb_set_intfdata(intf, NULL); 1190 usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle); 1191 err_all_but_rxbuf: 1192 usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle); 1193 err_tx_and_rx_and_irq: 1194 usb_free_urb(kaweth->irq_urb); 1195 err_tx_and_rx: 1196 usb_free_urb(kaweth->rx_urb); 1197 err_only_tx: 1198 usb_free_urb(kaweth->tx_urb); 1199 err_free_netdev: 1200 free_netdev(netdev); 1201 1202 return -EIO; 1203 } 1204 1205 /**************************************************************** 1206 * kaweth_disconnect 1207 ****************************************************************/ 1208 static void kaweth_disconnect(struct usb_interface *intf) 1209 { 1210 struct kaweth_device *kaweth = usb_get_intfdata(intf); 1211 struct net_device *netdev; 1212 1213 dev_info(&intf->dev, "Unregistering\n"); 1214 1215 usb_set_intfdata(intf, NULL); 1216 if (!kaweth) { 1217 dev_warn(&intf->dev, "unregistering non-existant device\n"); 1218 return; 1219 } 1220 netdev = kaweth->net; 1221 1222 dbg("Unregistering net device"); 1223 unregister_netdev(netdev); 1224 1225 usb_free_urb(kaweth->rx_urb); 1226 usb_free_urb(kaweth->tx_urb); 1227 usb_free_urb(kaweth->irq_urb); 1228 1229 usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle); 1230 usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle); 1231 1232 free_netdev(netdev); 1233 } 1234 1235 1236 // FIXME this completion stuff is a modified clone of 1237 // an OLD version of some stuff in usb.c ... 1238 struct usb_api_data { 1239 wait_queue_head_t wqh; 1240 int done; 1241 }; 1242 1243 /*-------------------------------------------------------------------* 1244 * completion handler for compatibility wrappers (sync control/bulk) * 1245 *-------------------------------------------------------------------*/ 1246 static void usb_api_blocking_completion(struct urb *urb) 1247 { 1248 struct usb_api_data *awd = (struct usb_api_data *)urb->context; 1249 1250 awd->done=1; 1251 wake_up(&awd->wqh); 1252 } 1253 1254 /*-------------------------------------------------------------------* 1255 * COMPATIBILITY STUFF * 1256 *-------------------------------------------------------------------*/ 1257 1258 // Starts urb and waits for completion or timeout 1259 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length) 1260 { 1261 struct usb_api_data awd; 1262 int status; 1263 1264 init_waitqueue_head(&awd.wqh); 1265 awd.done = 0; 1266 1267 urb->context = &awd; 1268 status = usb_submit_urb(urb, GFP_NOIO); 1269 if (status) { 1270 // something went wrong 1271 usb_free_urb(urb); 1272 return status; 1273 } 1274 1275 if (!wait_event_timeout(awd.wqh, awd.done, timeout)) { 1276 // timeout 1277 dev_warn(&urb->dev->dev, "usb_control/bulk_msg: timeout\n"); 1278 usb_kill_urb(urb); // remove urb safely 1279 status = -ETIMEDOUT; 1280 } 1281 else { 1282 status = urb->status; 1283 } 1284 1285 if (actual_length) { 1286 *actual_length = urb->actual_length; 1287 } 1288 1289 usb_free_urb(urb); 1290 return status; 1291 } 1292 1293 /*-------------------------------------------------------------------*/ 1294 // returns status (negative) or length (positive) 1295 static int kaweth_internal_control_msg(struct usb_device *usb_dev, 1296 unsigned int pipe, 1297 struct usb_ctrlrequest *cmd, void *data, 1298 int len, int timeout) 1299 { 1300 struct urb *urb; 1301 int retv; 1302 int length = 0; /* shut up GCC */ 1303 1304 urb = usb_alloc_urb(0, GFP_NOIO); 1305 if (!urb) 1306 return -ENOMEM; 1307 1308 usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data, 1309 len, usb_api_blocking_completion, NULL); 1310 1311 retv = usb_start_wait_urb(urb, timeout, &length); 1312 if (retv < 0) { 1313 return retv; 1314 } 1315 else { 1316 return length; 1317 } 1318 } 1319 1320 1321 /**************************************************************** 1322 * kaweth_init 1323 ****************************************************************/ 1324 static int __init kaweth_init(void) 1325 { 1326 dbg("Driver loading"); 1327 return usb_register(&kaweth_driver); 1328 } 1329 1330 /**************************************************************** 1331 * kaweth_exit 1332 ****************************************************************/ 1333 static void __exit kaweth_exit(void) 1334 { 1335 usb_deregister(&kaweth_driver); 1336 } 1337 1338 module_init(kaweth_init); 1339 module_exit(kaweth_exit); 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349