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 * Reduce arbitrary timeouts 40 * Smart multicast support 41 * Temporary MAC change support 42 * Tunable SOFs parameter - ioctl()? 43 * Ethernet stats collection 44 * Code formatting improvements 45 */ 46 47 #include <linux/module.h> 48 #include <linux/slab.h> 49 #include <linux/string.h> 50 #include <linux/init.h> 51 #include <linux/delay.h> 52 #include <linux/netdevice.h> 53 #include <linux/etherdevice.h> 54 #include <linux/usb.h> 55 #include <linux/types.h> 56 #include <linux/ethtool.h> 57 #include <linux/dma-mapping.h> 58 #include <linux/wait.h> 59 #include <linux/firmware.h> 60 #include <asm/uaccess.h> 61 #include <asm/byteorder.h> 62 63 #undef DEBUG 64 65 #define KAWETH_MTU 1514 66 #define KAWETH_BUF_SIZE 1664 67 #define KAWETH_TX_TIMEOUT (5 * HZ) 68 #define KAWETH_SCRATCH_SIZE 32 69 #define KAWETH_FIRMWARE_BUF_SIZE 4096 70 #define KAWETH_CONTROL_TIMEOUT (30000) 71 72 #define KAWETH_STATUS_BROKEN 0x0000001 73 #define KAWETH_STATUS_CLOSING 0x0000002 74 #define KAWETH_STATUS_SUSPENDING 0x0000004 75 76 #define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING) 77 78 #define KAWETH_PACKET_FILTER_PROMISCUOUS 0x01 79 #define KAWETH_PACKET_FILTER_ALL_MULTICAST 0x02 80 #define KAWETH_PACKET_FILTER_DIRECTED 0x04 81 #define KAWETH_PACKET_FILTER_BROADCAST 0x08 82 #define KAWETH_PACKET_FILTER_MULTICAST 0x10 83 84 /* Table 7 */ 85 #define KAWETH_COMMAND_GET_ETHERNET_DESC 0x00 86 #define KAWETH_COMMAND_MULTICAST_FILTERS 0x01 87 #define KAWETH_COMMAND_SET_PACKET_FILTER 0x02 88 #define KAWETH_COMMAND_STATISTICS 0x03 89 #define KAWETH_COMMAND_SET_TEMP_MAC 0x06 90 #define KAWETH_COMMAND_GET_TEMP_MAC 0x07 91 #define KAWETH_COMMAND_SET_URB_SIZE 0x08 92 #define KAWETH_COMMAND_SET_SOFS_WAIT 0x09 93 #define KAWETH_COMMAND_SCAN 0xFF 94 95 #define KAWETH_SOFS_TO_WAIT 0x05 96 97 #define INTBUFFERSIZE 4 98 99 #define STATE_OFFSET 0 100 #define STATE_MASK 0x40 101 #define STATE_SHIFT 5 102 103 #define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED) 104 105 106 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>"); 107 MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver"); 108 MODULE_LICENSE("GPL"); 109 MODULE_FIRMWARE("kaweth/new_code.bin"); 110 MODULE_FIRMWARE("kaweth/new_code_fix.bin"); 111 MODULE_FIRMWARE("kaweth/trigger_code.bin"); 112 MODULE_FIRMWARE("kaweth/trigger_code_fix.bin"); 113 114 static const char driver_name[] = "kaweth"; 115 116 static int kaweth_probe( 117 struct usb_interface *intf, 118 const struct usb_device_id *id /* from id_table */ 119 ); 120 static void kaweth_disconnect(struct usb_interface *intf); 121 static int kaweth_internal_control_msg(struct usb_device *usb_dev, 122 unsigned int pipe, 123 struct usb_ctrlrequest *cmd, void *data, 124 int len, int timeout); 125 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message); 126 static int kaweth_resume(struct usb_interface *intf); 127 128 /**************************************************************** 129 * usb_device_id 130 ****************************************************************/ 131 static struct usb_device_id usb_klsi_table[] = { 132 { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */ 133 { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */ 134 { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */ 135 { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */ 136 { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */ 137 { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */ 138 { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */ 139 { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */ 140 { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */ 141 { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */ 142 { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */ 143 { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */ 144 { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */ 145 { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */ 146 { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */ 147 { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */ 148 { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */ 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 }; 183 184 typedef __u8 eth_addr_t[6]; 185 186 /**************************************************************** 187 * usb_eth_dev 188 ****************************************************************/ 189 struct usb_eth_dev { 190 char *name; 191 __u16 vendor; 192 __u16 device; 193 void *pdata; 194 }; 195 196 /**************************************************************** 197 * kaweth_ethernet_configuration 198 * Refer Table 8 199 ****************************************************************/ 200 struct kaweth_ethernet_configuration 201 { 202 __u8 size; 203 __u8 reserved1; 204 __u8 reserved2; 205 eth_addr_t hw_addr; 206 __u32 statistics_mask; 207 __le16 segment_size; 208 __u16 max_multicast_filters; 209 __u8 reserved3; 210 } __attribute__ ((packed)); 211 212 /**************************************************************** 213 * kaweth_device 214 ****************************************************************/ 215 struct kaweth_device 216 { 217 spinlock_t device_lock; 218 219 __u32 status; 220 int end; 221 int suspend_lowmem_rx; 222 int suspend_lowmem_ctrl; 223 int linkstate; 224 int opened; 225 struct delayed_work lowmem_work; 226 227 struct usb_device *dev; 228 struct usb_interface *intf; 229 struct net_device *net; 230 wait_queue_head_t term_wait; 231 232 struct urb *rx_urb; 233 struct urb *tx_urb; 234 struct urb *irq_urb; 235 236 dma_addr_t intbufferhandle; 237 __u8 *intbuffer; 238 dma_addr_t rxbufferhandle; 239 __u8 *rx_buf; 240 241 242 struct sk_buff *tx_skb; 243 244 __u8 *firmware_buf; 245 __u8 scratch[KAWETH_SCRATCH_SIZE]; 246 __u16 packet_filter_bitmap; 247 248 struct kaweth_ethernet_configuration configuration; 249 250 struct net_device_stats stats; 251 }; 252 253 /**************************************************************** 254 * kaweth_control 255 ****************************************************************/ 256 static int kaweth_control(struct kaweth_device *kaweth, 257 unsigned int pipe, 258 __u8 request, 259 __u8 requesttype, 260 __u16 value, 261 __u16 index, 262 void *data, 263 __u16 size, 264 int timeout) 265 { 266 struct usb_ctrlrequest *dr; 267 268 dbg("kaweth_control()"); 269 270 if(in_interrupt()) { 271 dbg("in_interrupt()"); 272 return -EBUSY; 273 } 274 275 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC); 276 277 if (!dr) { 278 dbg("kmalloc() failed"); 279 return -ENOMEM; 280 } 281 282 dr->bRequestType= requesttype; 283 dr->bRequest = request; 284 dr->wValue = cpu_to_le16(value); 285 dr->wIndex = cpu_to_le16(index); 286 dr->wLength = cpu_to_le16(size); 287 288 return kaweth_internal_control_msg(kaweth->dev, 289 pipe, 290 dr, 291 data, 292 size, 293 timeout); 294 } 295 296 /**************************************************************** 297 * kaweth_read_configuration 298 ****************************************************************/ 299 static int kaweth_read_configuration(struct kaweth_device *kaweth) 300 { 301 int retval; 302 303 dbg("Reading kaweth configuration"); 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 dbg("Setting URB size to %d", (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 dbg("Set SOFS wait to %d", (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 dbg("Set receive filter to %d", (unsigned)receive_filter); 371 372 retval = kaweth_control(kaweth, 373 usb_sndctrlpipe(kaweth->dev, 0), 374 KAWETH_COMMAND_SET_PACKET_FILTER, 375 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 376 receive_filter, 377 0, 378 (void *)&kaweth->scratch, 379 0, 380 KAWETH_CONTROL_TIMEOUT); 381 382 return retval; 383 } 384 385 /**************************************************************** 386 * kaweth_download_firmware 387 ****************************************************************/ 388 static int kaweth_download_firmware(struct kaweth_device *kaweth, 389 const char *fwname, 390 __u8 interrupt, 391 __u8 type) 392 { 393 const struct firmware *fw; 394 int data_len; 395 int ret; 396 397 ret = request_firmware(&fw, fwname, &kaweth->dev->dev); 398 if (ret) { 399 err("Firmware request failed\n"); 400 return ret; 401 } 402 403 if (fw->size > KAWETH_FIRMWARE_BUF_SIZE) { 404 err("Firmware too big: %zu", fw->size); 405 return -ENOSPC; 406 } 407 data_len = fw->size; 408 memcpy(kaweth->firmware_buf, fw->data, fw->size); 409 410 release_firmware(fw); 411 412 kaweth->firmware_buf[2] = (data_len & 0xFF) - 7; 413 kaweth->firmware_buf[3] = data_len >> 8; 414 kaweth->firmware_buf[4] = type; 415 kaweth->firmware_buf[5] = interrupt; 416 417 dbg("High: %i, Low:%i", kaweth->firmware_buf[3], 418 kaweth->firmware_buf[2]); 419 420 dbg("Downloading firmware at %p to kaweth device at %p", 421 fw->data, kaweth); 422 dbg("Firmware length: %d", data_len); 423 424 return kaweth_control(kaweth, 425 usb_sndctrlpipe(kaweth->dev, 0), 426 KAWETH_COMMAND_SCAN, 427 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 428 0, 429 0, 430 (void *)kaweth->firmware_buf, 431 data_len, 432 KAWETH_CONTROL_TIMEOUT); 433 } 434 435 /**************************************************************** 436 * kaweth_trigger_firmware 437 ****************************************************************/ 438 static int kaweth_trigger_firmware(struct kaweth_device *kaweth, 439 __u8 interrupt) 440 { 441 kaweth->firmware_buf[0] = 0xB6; 442 kaweth->firmware_buf[1] = 0xC3; 443 kaweth->firmware_buf[2] = 0x01; 444 kaweth->firmware_buf[3] = 0x00; 445 kaweth->firmware_buf[4] = 0x06; 446 kaweth->firmware_buf[5] = interrupt; 447 kaweth->firmware_buf[6] = 0x00; 448 kaweth->firmware_buf[7] = 0x00; 449 450 dbg("Triggering firmware"); 451 452 return kaweth_control(kaweth, 453 usb_sndctrlpipe(kaweth->dev, 0), 454 KAWETH_COMMAND_SCAN, 455 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 456 0, 457 0, 458 (void *)kaweth->firmware_buf, 459 8, 460 KAWETH_CONTROL_TIMEOUT); 461 } 462 463 /**************************************************************** 464 * kaweth_reset 465 ****************************************************************/ 466 static int kaweth_reset(struct kaweth_device *kaweth) 467 { 468 int result; 469 470 dbg("kaweth_reset(%p)", kaweth); 471 result = kaweth_control(kaweth, 472 usb_sndctrlpipe(kaweth->dev, 0), 473 USB_REQ_SET_CONFIGURATION, 474 0, 475 kaweth->dev->config[0].desc.bConfigurationValue, 476 0, 477 NULL, 478 0, 479 KAWETH_CONTROL_TIMEOUT); 480 481 mdelay(10); 482 483 dbg("kaweth_reset() returns %d.",result); 484 485 return result; 486 } 487 488 static void kaweth_usb_receive(struct urb *); 489 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t); 490 491 /**************************************************************** 492 int_callback 493 *****************************************************************/ 494 495 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf) 496 { 497 int status; 498 499 status = usb_submit_urb (kaweth->irq_urb, mf); 500 if (unlikely(status == -ENOMEM)) { 501 kaweth->suspend_lowmem_ctrl = 1; 502 schedule_delayed_work(&kaweth->lowmem_work, HZ/4); 503 } else { 504 kaweth->suspend_lowmem_ctrl = 0; 505 } 506 507 if (status) 508 err ("can't resubmit intr, %s-%s, status %d", 509 kaweth->dev->bus->bus_name, 510 kaweth->dev->devpath, status); 511 } 512 513 static void int_callback(struct urb *u) 514 { 515 struct kaweth_device *kaweth = u->context; 516 int act_state; 517 int status = u->status; 518 519 switch (status) { 520 case 0: /* success */ 521 break; 522 case -ECONNRESET: /* unlink */ 523 case -ENOENT: 524 case -ESHUTDOWN: 525 return; 526 /* -EPIPE: should clear the halt */ 527 default: /* error */ 528 goto resubmit; 529 } 530 531 /* we check the link state to report changes */ 532 if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) { 533 if (act_state) 534 netif_carrier_on(kaweth->net); 535 else 536 netif_carrier_off(kaweth->net); 537 538 kaweth->linkstate = act_state; 539 } 540 resubmit: 541 kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC); 542 } 543 544 static void kaweth_resubmit_tl(struct work_struct *work) 545 { 546 struct kaweth_device *kaweth = 547 container_of(work, struct kaweth_device, lowmem_work.work); 548 549 if (IS_BLOCKED(kaweth->status)) 550 return; 551 552 if (kaweth->suspend_lowmem_rx) 553 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO); 554 555 if (kaweth->suspend_lowmem_ctrl) 556 kaweth_resubmit_int_urb(kaweth, GFP_NOIO); 557 } 558 559 560 /**************************************************************** 561 * kaweth_resubmit_rx_urb 562 ****************************************************************/ 563 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth, 564 gfp_t mem_flags) 565 { 566 int result; 567 568 usb_fill_bulk_urb(kaweth->rx_urb, 569 kaweth->dev, 570 usb_rcvbulkpipe(kaweth->dev, 1), 571 kaweth->rx_buf, 572 KAWETH_BUF_SIZE, 573 kaweth_usb_receive, 574 kaweth); 575 kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 576 kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle; 577 578 if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) { 579 if (result == -ENOMEM) { 580 kaweth->suspend_lowmem_rx = 1; 581 schedule_delayed_work(&kaweth->lowmem_work, HZ/4); 582 } 583 err("resubmitting rx_urb %d failed", result); 584 } else { 585 kaweth->suspend_lowmem_rx = 0; 586 } 587 588 return result; 589 } 590 591 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth); 592 593 /**************************************************************** 594 * kaweth_usb_receive 595 ****************************************************************/ 596 static void kaweth_usb_receive(struct urb *urb) 597 { 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 == -ECONNRESET || status == -ESHUTDOWN)) 610 /* we are killed - set a flag and wake the disconnect handler */ 611 { 612 kaweth->end = 1; 613 wake_up(&kaweth->term_wait); 614 return; 615 } 616 617 spin_lock(&kaweth->device_lock); 618 if (IS_BLOCKED(kaweth->status)) { 619 spin_unlock(&kaweth->device_lock); 620 return; 621 } 622 spin_unlock(&kaweth->device_lock); 623 624 if(status && status != -EREMOTEIO && count != 1) { 625 err("%s RX status: %d count: %d packet_len: %d", 626 net->name, 627 status, 628 count, 629 (int)pkt_len); 630 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 631 return; 632 } 633 634 if(kaweth->net && (count > 2)) { 635 if(pkt_len > (count - 2)) { 636 err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count); 637 err("Packet len & 2047: %x", pkt_len & 2047); 638 err("Count 2: %x", count2); 639 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 640 return; 641 } 642 643 if(!(skb = dev_alloc_skb(pkt_len+2))) { 644 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 645 return; 646 } 647 648 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */ 649 650 skb_copy_to_linear_data(skb, kaweth->rx_buf + 2, pkt_len); 651 652 skb_put(skb, pkt_len); 653 654 skb->protocol = eth_type_trans(skb, net); 655 656 netif_rx(skb); 657 658 kaweth->stats.rx_packets++; 659 kaweth->stats.rx_bytes += pkt_len; 660 } 661 662 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 663 } 664 665 /**************************************************************** 666 * kaweth_open 667 ****************************************************************/ 668 static int kaweth_open(struct net_device *net) 669 { 670 struct kaweth_device *kaweth = netdev_priv(net); 671 int res; 672 673 dbg("Opening network device."); 674 675 res = usb_autopm_get_interface(kaweth->intf); 676 if (res) { 677 err("Interface cannot be resumed."); 678 return -EIO; 679 } 680 res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL); 681 if (res) 682 goto err_out; 683 684 usb_fill_int_urb( 685 kaweth->irq_urb, 686 kaweth->dev, 687 usb_rcvintpipe(kaweth->dev, 3), 688 kaweth->intbuffer, 689 INTBUFFERSIZE, 690 int_callback, 691 kaweth, 692 250); /* overriding the descriptor */ 693 kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle; 694 kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 695 696 res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL); 697 if (res) { 698 usb_kill_urb(kaweth->rx_urb); 699 goto err_out; 700 } 701 kaweth->opened = 1; 702 703 netif_start_queue(net); 704 705 kaweth_async_set_rx_mode(kaweth); 706 return 0; 707 708 err_out: 709 usb_autopm_enable(kaweth->intf); 710 return -EIO; 711 } 712 713 /**************************************************************** 714 * kaweth_kill_urbs 715 ****************************************************************/ 716 static void kaweth_kill_urbs(struct kaweth_device *kaweth) 717 { 718 usb_kill_urb(kaweth->irq_urb); 719 usb_kill_urb(kaweth->rx_urb); 720 usb_kill_urb(kaweth->tx_urb); 721 722 cancel_delayed_work_sync(&kaweth->lowmem_work); 723 724 /* a scheduled work may have resubmitted, 725 we hit them again */ 726 usb_kill_urb(kaweth->irq_urb); 727 usb_kill_urb(kaweth->rx_urb); 728 } 729 730 /**************************************************************** 731 * kaweth_close 732 ****************************************************************/ 733 static int kaweth_close(struct net_device *net) 734 { 735 struct kaweth_device *kaweth = netdev_priv(net); 736 737 netif_stop_queue(net); 738 kaweth->opened = 0; 739 740 kaweth->status |= KAWETH_STATUS_CLOSING; 741 742 kaweth_kill_urbs(kaweth); 743 744 kaweth->status &= ~KAWETH_STATUS_CLOSING; 745 746 usb_autopm_enable(kaweth->intf); 747 748 return 0; 749 } 750 751 static void kaweth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) 752 { 753 struct kaweth_device *kaweth = netdev_priv(dev); 754 755 strlcpy(info->driver, driver_name, sizeof(info->driver)); 756 usb_make_path(kaweth->dev, info->bus_info, sizeof (info->bus_info)); 757 } 758 759 static u32 kaweth_get_link(struct net_device *dev) 760 { 761 struct kaweth_device *kaweth = netdev_priv(dev); 762 763 return kaweth->linkstate; 764 } 765 766 static struct ethtool_ops ops = { 767 .get_drvinfo = kaweth_get_drvinfo, 768 .get_link = kaweth_get_link 769 }; 770 771 /**************************************************************** 772 * kaweth_usb_transmit_complete 773 ****************************************************************/ 774 static void kaweth_usb_transmit_complete(struct urb *urb) 775 { 776 struct kaweth_device *kaweth = urb->context; 777 struct sk_buff *skb = kaweth->tx_skb; 778 int status = urb->status; 779 780 if (unlikely(status != 0)) 781 if (status != -ENOENT) 782 dbg("%s: TX status %d.", kaweth->net->name, status); 783 784 netif_wake_queue(kaweth->net); 785 dev_kfree_skb_irq(skb); 786 } 787 788 /**************************************************************** 789 * kaweth_start_xmit 790 ****************************************************************/ 791 static int kaweth_start_xmit(struct sk_buff *skb, struct net_device *net) 792 { 793 struct kaweth_device *kaweth = netdev_priv(net); 794 __le16 *private_header; 795 796 int res; 797 798 spin_lock_irq(&kaweth->device_lock); 799 800 kaweth_async_set_rx_mode(kaweth); 801 netif_stop_queue(net); 802 if (IS_BLOCKED(kaweth->status)) { 803 goto skip; 804 } 805 806 /* We now decide whether we can put our special header into the sk_buff */ 807 if (skb_cloned(skb) || skb_headroom(skb) < 2) { 808 /* no such luck - we make our own */ 809 struct sk_buff *copied_skb; 810 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC); 811 dev_kfree_skb_irq(skb); 812 skb = copied_skb; 813 if (!copied_skb) { 814 kaweth->stats.tx_errors++; 815 netif_start_queue(net); 816 spin_unlock_irq(&kaweth->device_lock); 817 return 0; 818 } 819 } 820 821 private_header = (__le16 *)__skb_push(skb, 2); 822 *private_header = cpu_to_le16(skb->len-2); 823 kaweth->tx_skb = skb; 824 825 usb_fill_bulk_urb(kaweth->tx_urb, 826 kaweth->dev, 827 usb_sndbulkpipe(kaweth->dev, 2), 828 private_header, 829 skb->len, 830 kaweth_usb_transmit_complete, 831 kaweth); 832 kaweth->end = 0; 833 834 if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC))) 835 { 836 dev_warn(&net->dev, "kaweth failed tx_urb %d\n", res); 837 skip: 838 kaweth->stats.tx_errors++; 839 840 netif_start_queue(net); 841 dev_kfree_skb_irq(skb); 842 } 843 else 844 { 845 kaweth->stats.tx_packets++; 846 kaweth->stats.tx_bytes += skb->len; 847 net->trans_start = jiffies; 848 } 849 850 spin_unlock_irq(&kaweth->device_lock); 851 852 return 0; 853 } 854 855 /**************************************************************** 856 * kaweth_set_rx_mode 857 ****************************************************************/ 858 static void kaweth_set_rx_mode(struct net_device *net) 859 { 860 struct kaweth_device *kaweth = netdev_priv(net); 861 862 __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED | 863 KAWETH_PACKET_FILTER_BROADCAST | 864 KAWETH_PACKET_FILTER_MULTICAST; 865 866 dbg("Setting Rx mode to %d", packet_filter_bitmap); 867 868 netif_stop_queue(net); 869 870 if (net->flags & IFF_PROMISC) { 871 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS; 872 } 873 else if ((net->mc_count) || (net->flags & IFF_ALLMULTI)) { 874 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST; 875 } 876 877 kaweth->packet_filter_bitmap = packet_filter_bitmap; 878 netif_wake_queue(net); 879 } 880 881 /**************************************************************** 882 * kaweth_async_set_rx_mode 883 ****************************************************************/ 884 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth) 885 { 886 __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap; 887 kaweth->packet_filter_bitmap = 0; 888 if (packet_filter_bitmap == 0) 889 return; 890 891 { 892 int result; 893 result = kaweth_control(kaweth, 894 usb_sndctrlpipe(kaweth->dev, 0), 895 KAWETH_COMMAND_SET_PACKET_FILTER, 896 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 897 packet_filter_bitmap, 898 0, 899 (void *)&kaweth->scratch, 900 0, 901 KAWETH_CONTROL_TIMEOUT); 902 903 if(result < 0) { 904 err("Failed to set Rx mode: %d", result); 905 } 906 else { 907 dbg("Set Rx mode to %d", packet_filter_bitmap); 908 } 909 } 910 } 911 912 /**************************************************************** 913 * kaweth_netdev_stats 914 ****************************************************************/ 915 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev) 916 { 917 struct kaweth_device *kaweth = netdev_priv(dev); 918 return &kaweth->stats; 919 } 920 921 /**************************************************************** 922 * kaweth_tx_timeout 923 ****************************************************************/ 924 static void kaweth_tx_timeout(struct net_device *net) 925 { 926 struct kaweth_device *kaweth = netdev_priv(net); 927 928 dev_warn(&net->dev, "%s: Tx timed out. Resetting.\n", net->name); 929 kaweth->stats.tx_errors++; 930 net->trans_start = jiffies; 931 932 usb_unlink_urb(kaweth->tx_urb); 933 } 934 935 /**************************************************************** 936 * kaweth_suspend 937 ****************************************************************/ 938 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message) 939 { 940 struct kaweth_device *kaweth = usb_get_intfdata(intf); 941 unsigned long flags; 942 943 dbg("Suspending device"); 944 spin_lock_irqsave(&kaweth->device_lock, flags); 945 kaweth->status |= KAWETH_STATUS_SUSPENDING; 946 spin_unlock_irqrestore(&kaweth->device_lock, flags); 947 948 kaweth_kill_urbs(kaweth); 949 return 0; 950 } 951 952 /**************************************************************** 953 * kaweth_resume 954 ****************************************************************/ 955 static int kaweth_resume(struct usb_interface *intf) 956 { 957 struct kaweth_device *kaweth = usb_get_intfdata(intf); 958 unsigned long flags; 959 960 dbg("Resuming device"); 961 spin_lock_irqsave(&kaweth->device_lock, flags); 962 kaweth->status &= ~KAWETH_STATUS_SUSPENDING; 963 spin_unlock_irqrestore(&kaweth->device_lock, flags); 964 965 if (!kaweth->opened) 966 return 0; 967 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO); 968 kaweth_resubmit_int_urb(kaweth, GFP_NOIO); 969 970 return 0; 971 } 972 973 /**************************************************************** 974 * kaweth_probe 975 ****************************************************************/ 976 977 978 static const struct net_device_ops kaweth_netdev_ops = { 979 .ndo_open = kaweth_open, 980 .ndo_stop = kaweth_close, 981 .ndo_start_xmit = kaweth_start_xmit, 982 .ndo_tx_timeout = kaweth_tx_timeout, 983 .ndo_set_multicast_list = kaweth_set_rx_mode, 984 .ndo_get_stats = kaweth_netdev_stats, 985 }; 986 987 static int kaweth_probe( 988 struct usb_interface *intf, 989 const struct usb_device_id *id /* from id_table */ 990 ) 991 { 992 struct usb_device *dev = interface_to_usbdev(intf); 993 struct kaweth_device *kaweth; 994 struct net_device *netdev; 995 const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; 996 int result = 0; 997 998 dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x", 999 dev->devnum, 1000 le16_to_cpu(dev->descriptor.idVendor), 1001 le16_to_cpu(dev->descriptor.idProduct), 1002 le16_to_cpu(dev->descriptor.bcdDevice)); 1003 1004 dbg("Device at %p", dev); 1005 1006 dbg("Descriptor length: %x type: %x", 1007 (int)dev->descriptor.bLength, 1008 (int)dev->descriptor.bDescriptorType); 1009 1010 netdev = alloc_etherdev(sizeof(*kaweth)); 1011 if (!netdev) 1012 return -ENOMEM; 1013 1014 kaweth = netdev_priv(netdev); 1015 kaweth->dev = dev; 1016 kaweth->net = netdev; 1017 1018 spin_lock_init(&kaweth->device_lock); 1019 init_waitqueue_head(&kaweth->term_wait); 1020 1021 dbg("Resetting."); 1022 1023 kaweth_reset(kaweth); 1024 1025 /* 1026 * If high byte of bcdDevice is nonzero, firmware is already 1027 * downloaded. Don't try to do it again, or we'll hang the device. 1028 */ 1029 1030 if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) { 1031 dev_info(&intf->dev, "Firmware present in device.\n"); 1032 } else { 1033 /* Download the firmware */ 1034 dev_info(&intf->dev, "Downloading firmware...\n"); 1035 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL); 1036 if ((result = kaweth_download_firmware(kaweth, 1037 "kaweth/new_code.bin", 1038 100, 1039 2)) < 0) { 1040 err("Error downloading firmware (%d)", result); 1041 goto err_fw; 1042 } 1043 1044 if ((result = kaweth_download_firmware(kaweth, 1045 "kaweth/new_code_fix.bin", 1046 100, 1047 3)) < 0) { 1048 err("Error downloading firmware fix (%d)", result); 1049 goto err_fw; 1050 } 1051 1052 if ((result = kaweth_download_firmware(kaweth, 1053 "kaweth/trigger_code.bin", 1054 126, 1055 2)) < 0) { 1056 err("Error downloading trigger code (%d)", result); 1057 goto err_fw; 1058 1059 } 1060 1061 if ((result = kaweth_download_firmware(kaweth, 1062 "kaweth/trigger_code_fix.bin", 1063 126, 1064 3)) < 0) { 1065 err("Error downloading trigger code fix (%d)", result); 1066 goto err_fw; 1067 } 1068 1069 1070 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) { 1071 err("Error triggering firmware (%d)", result); 1072 goto err_fw; 1073 } 1074 1075 /* Device will now disappear for a moment... */ 1076 dev_info(&intf->dev, "Firmware loaded. I'll be back...\n"); 1077 err_fw: 1078 free_page((unsigned long)kaweth->firmware_buf); 1079 free_netdev(netdev); 1080 return -EIO; 1081 } 1082 1083 result = kaweth_read_configuration(kaweth); 1084 1085 if(result < 0) { 1086 err("Error reading configuration (%d), no net device created", result); 1087 goto err_free_netdev; 1088 } 1089 1090 dev_info(&intf->dev, "Statistics collection: %x\n", kaweth->configuration.statistics_mask); 1091 dev_info(&intf->dev, "Multicast filter limit: %x\n", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1)); 1092 dev_info(&intf->dev, "MTU: %d\n", le16_to_cpu(kaweth->configuration.segment_size)); 1093 dev_info(&intf->dev, "Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n", 1094 (int)kaweth->configuration.hw_addr[0], 1095 (int)kaweth->configuration.hw_addr[1], 1096 (int)kaweth->configuration.hw_addr[2], 1097 (int)kaweth->configuration.hw_addr[3], 1098 (int)kaweth->configuration.hw_addr[4], 1099 (int)kaweth->configuration.hw_addr[5]); 1100 1101 if(!memcmp(&kaweth->configuration.hw_addr, 1102 &bcast_addr, 1103 sizeof(bcast_addr))) { 1104 err("Firmware not functioning properly, no net device created"); 1105 goto err_free_netdev; 1106 } 1107 1108 if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) { 1109 dbg("Error setting URB size"); 1110 goto err_free_netdev; 1111 } 1112 1113 if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) { 1114 err("Error setting SOFS wait"); 1115 goto err_free_netdev; 1116 } 1117 1118 result = kaweth_set_receive_filter(kaweth, 1119 KAWETH_PACKET_FILTER_DIRECTED | 1120 KAWETH_PACKET_FILTER_BROADCAST | 1121 KAWETH_PACKET_FILTER_MULTICAST); 1122 1123 if(result < 0) { 1124 err("Error setting receive filter"); 1125 goto err_free_netdev; 1126 } 1127 1128 dbg("Initializing net device."); 1129 1130 kaweth->intf = intf; 1131 1132 kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 1133 if (!kaweth->tx_urb) 1134 goto err_free_netdev; 1135 kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL); 1136 if (!kaweth->rx_urb) 1137 goto err_only_tx; 1138 kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL); 1139 if (!kaweth->irq_urb) 1140 goto err_tx_and_rx; 1141 1142 kaweth->intbuffer = usb_buffer_alloc( kaweth->dev, 1143 INTBUFFERSIZE, 1144 GFP_KERNEL, 1145 &kaweth->intbufferhandle); 1146 if (!kaweth->intbuffer) 1147 goto err_tx_and_rx_and_irq; 1148 kaweth->rx_buf = usb_buffer_alloc( kaweth->dev, 1149 KAWETH_BUF_SIZE, 1150 GFP_KERNEL, 1151 &kaweth->rxbufferhandle); 1152 if (!kaweth->rx_buf) 1153 goto err_all_but_rxbuf; 1154 1155 memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr)); 1156 memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr, 1157 sizeof(kaweth->configuration.hw_addr)); 1158 1159 netdev->netdev_ops = &kaweth_netdev_ops; 1160 netdev->watchdog_timeo = KAWETH_TX_TIMEOUT; 1161 netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size); 1162 SET_ETHTOOL_OPS(netdev, &ops); 1163 1164 /* kaweth is zeroed as part of alloc_netdev */ 1165 INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl); 1166 usb_set_intfdata(intf, kaweth); 1167 1168 #if 0 1169 // dma_supported() is deeply broken on almost all architectures 1170 if (dma_supported (&intf->dev, 0xffffffffffffffffULL)) 1171 kaweth->net->features |= NETIF_F_HIGHDMA; 1172 #endif 1173 1174 SET_NETDEV_DEV(netdev, &intf->dev); 1175 if (register_netdev(netdev) != 0) { 1176 err("Error registering netdev."); 1177 goto err_intfdata; 1178 } 1179 1180 dev_info(&intf->dev, "kaweth interface created at %s\n", 1181 kaweth->net->name); 1182 1183 dbg("Kaweth probe returning."); 1184 1185 return 0; 1186 1187 err_intfdata: 1188 usb_set_intfdata(intf, NULL); 1189 usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle); 1190 err_all_but_rxbuf: 1191 usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle); 1192 err_tx_and_rx_and_irq: 1193 usb_free_urb(kaweth->irq_urb); 1194 err_tx_and_rx: 1195 usb_free_urb(kaweth->rx_urb); 1196 err_only_tx: 1197 usb_free_urb(kaweth->tx_urb); 1198 err_free_netdev: 1199 free_netdev(netdev); 1200 1201 return -EIO; 1202 } 1203 1204 /**************************************************************** 1205 * kaweth_disconnect 1206 ****************************************************************/ 1207 static void kaweth_disconnect(struct usb_interface *intf) 1208 { 1209 struct kaweth_device *kaweth = usb_get_intfdata(intf); 1210 struct net_device *netdev; 1211 1212 dev_info(&intf->dev, "Unregistering\n"); 1213 1214 usb_set_intfdata(intf, NULL); 1215 if (!kaweth) { 1216 dev_warn(&intf->dev, "unregistering non-existant device\n"); 1217 return; 1218 } 1219 netdev = kaweth->net; 1220 1221 dbg("Unregistering net device"); 1222 unregister_netdev(netdev); 1223 1224 usb_free_urb(kaweth->rx_urb); 1225 usb_free_urb(kaweth->tx_urb); 1226 usb_free_urb(kaweth->irq_urb); 1227 1228 usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle); 1229 usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle); 1230 1231 free_netdev(netdev); 1232 } 1233 1234 1235 // FIXME this completion stuff is a modified clone of 1236 // an OLD version of some stuff in usb.c ... 1237 struct usb_api_data { 1238 wait_queue_head_t wqh; 1239 int done; 1240 }; 1241 1242 /*-------------------------------------------------------------------* 1243 * completion handler for compatibility wrappers (sync control/bulk) * 1244 *-------------------------------------------------------------------*/ 1245 static void usb_api_blocking_completion(struct urb *urb) 1246 { 1247 struct usb_api_data *awd = (struct usb_api_data *)urb->context; 1248 1249 awd->done=1; 1250 wake_up(&awd->wqh); 1251 } 1252 1253 /*-------------------------------------------------------------------* 1254 * COMPATIBILITY STUFF * 1255 *-------------------------------------------------------------------*/ 1256 1257 // Starts urb and waits for completion or timeout 1258 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length) 1259 { 1260 struct usb_api_data awd; 1261 int status; 1262 1263 init_waitqueue_head(&awd.wqh); 1264 awd.done = 0; 1265 1266 urb->context = &awd; 1267 status = usb_submit_urb(urb, GFP_NOIO); 1268 if (status) { 1269 // something went wrong 1270 usb_free_urb(urb); 1271 return status; 1272 } 1273 1274 if (!wait_event_timeout(awd.wqh, awd.done, timeout)) { 1275 // timeout 1276 dev_warn(&urb->dev->dev, "usb_control/bulk_msg: timeout\n"); 1277 usb_kill_urb(urb); // remove urb safely 1278 status = -ETIMEDOUT; 1279 } 1280 else { 1281 status = urb->status; 1282 } 1283 1284 if (actual_length) { 1285 *actual_length = urb->actual_length; 1286 } 1287 1288 usb_free_urb(urb); 1289 return status; 1290 } 1291 1292 /*-------------------------------------------------------------------*/ 1293 // returns status (negative) or length (positive) 1294 static int kaweth_internal_control_msg(struct usb_device *usb_dev, 1295 unsigned int pipe, 1296 struct usb_ctrlrequest *cmd, void *data, 1297 int len, int timeout) 1298 { 1299 struct urb *urb; 1300 int retv; 1301 int length = 0; /* shut up GCC */ 1302 1303 urb = usb_alloc_urb(0, GFP_NOIO); 1304 if (!urb) 1305 return -ENOMEM; 1306 1307 usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data, 1308 len, usb_api_blocking_completion, NULL); 1309 1310 retv = usb_start_wait_urb(urb, timeout, &length); 1311 if (retv < 0) { 1312 return retv; 1313 } 1314 else { 1315 return length; 1316 } 1317 } 1318 1319 1320 /**************************************************************** 1321 * kaweth_init 1322 ****************************************************************/ 1323 static int __init kaweth_init(void) 1324 { 1325 dbg("Driver loading"); 1326 return usb_register(&kaweth_driver); 1327 } 1328 1329 /**************************************************************** 1330 * kaweth_exit 1331 ****************************************************************/ 1332 static void __exit kaweth_exit(void) 1333 { 1334 usb_deregister(&kaweth_driver); 1335 } 1336 1337 module_init(kaweth_init); 1338 module_exit(kaweth_exit); 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348