1/* 2 * Streamzap Remote Control driver 3 * 4 * Copyright (c) 2005 Christoph Bartelmus <lirc@bartelmus.de> 5 * Copyright (c) 2010 Jarod Wilson <jarod@wilsonet.com> 6 * 7 * This driver was based on the work of Greg Wickham and Adrian 8 * Dewhurst. It was substantially rewritten to support correct signal 9 * gaps and now maintains a delay buffer, which is used to present 10 * consistent timing behaviour to user space applications. Without the 11 * delay buffer an ugly hack would be required in lircd, which can 12 * cause sluggish signal decoding in certain situations. 13 * 14 * Ported to in-kernel ir-core interface by Jarod Wilson 15 * 16 * This driver is based on the USB skeleton driver packaged with the 17 * kernel; copyright (C) 2001-2003 Greg Kroah-Hartman (greg@kroah.com) 18 * 19 * This program is free software; you can redistribute it and/or modify 20 * it under the terms of the GNU General Public License as published by 21 * the Free Software Foundation; either version 2 of the License, or 22 * (at your option) any later version. 23 * 24 * This program is distributed in the hope that it will be useful, 25 * but WITHOUT ANY WARRANTY; without even the implied warranty of 26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 27 * GNU General Public License for more details. 28 * 29 * You should have received a copy of the GNU General Public License 30 * along with this program; if not, write to the Free Software 31 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 32 */ 33 34#include <linux/device.h> 35#include <linux/module.h> 36#include <linux/slab.h> 37#include <linux/usb.h> 38#include <linux/input.h> 39#include <media/ir-core.h> 40 41#define DRIVER_VERSION "1.60" 42#define DRIVER_NAME "streamzap" 43#define DRIVER_DESC "Streamzap Remote Control driver" 44 45#ifdef CONFIG_USB_DEBUG 46static int debug = 1; 47#else 48static int debug; 49#endif 50 51#define USB_STREAMZAP_VENDOR_ID 0x0e9c 52#define USB_STREAMZAP_PRODUCT_ID 0x0000 53 54/* table of devices that work with this driver */ 55static struct usb_device_id streamzap_table[] = { 56 /* Streamzap Remote Control */ 57 { USB_DEVICE(USB_STREAMZAP_VENDOR_ID, USB_STREAMZAP_PRODUCT_ID) }, 58 /* Terminating entry */ 59 { } 60}; 61 62MODULE_DEVICE_TABLE(usb, streamzap_table); 63 64#define STREAMZAP_PULSE_MASK 0xf0 65#define STREAMZAP_SPACE_MASK 0x0f 66#define STREAMZAP_TIMEOUT 0xff 67#define STREAMZAP_RESOLUTION 256 68 69/* number of samples buffered */ 70#define SZ_BUF_LEN 128 71 72enum StreamzapDecoderState { 73 PulseSpace, 74 FullPulse, 75 FullSpace, 76 IgnorePulse 77}; 78 79/* structure to hold our device specific stuff */ 80struct streamzap_ir { 81 82 /* ir-core */ 83 struct ir_dev_props *props; 84 struct ir_raw_event rawir; 85 86 /* core device info */ 87 struct device *dev; 88 struct input_dev *idev; 89 90 /* usb */ 91 struct usb_device *usbdev; 92 struct usb_interface *interface; 93 struct usb_endpoint_descriptor *endpoint; 94 struct urb *urb_in; 95 96 /* buffer & dma */ 97 unsigned char *buf_in; 98 dma_addr_t dma_in; 99 unsigned int buf_in_len; 100 101 /* timer used to support delay buffering */ 102 struct timer_list delay_timer; 103 bool timer_running; 104 spinlock_t timer_lock; 105 struct timer_list flush_timer; 106 bool flush; 107 108 /* delay buffer */ 109 struct kfifo fifo; 110 bool fifo_initialized; 111 112 /* track what state we're in */ 113 enum StreamzapDecoderState decoder_state; 114 /* tracks whether we are currently receiving some signal */ 115 bool idle; 116 /* sum of signal lengths received since signal start */ 117 unsigned long sum; 118 /* start time of signal; necessary for gap tracking */ 119 struct timeval signal_last; 120 struct timeval signal_start; 121 /* bool timeout_enabled; */ 122 123 char name[128]; 124 char phys[64]; 125}; 126 127 128/* local function prototypes */ 129static int streamzap_probe(struct usb_interface *interface, 130 const struct usb_device_id *id); 131static void streamzap_disconnect(struct usb_interface *interface); 132static void streamzap_callback(struct urb *urb); 133static int streamzap_suspend(struct usb_interface *intf, pm_message_t message); 134static int streamzap_resume(struct usb_interface *intf); 135 136/* usb specific object needed to register this driver with the usb subsystem */ 137static struct usb_driver streamzap_driver = { 138 .name = DRIVER_NAME, 139 .probe = streamzap_probe, 140 .disconnect = streamzap_disconnect, 141 .suspend = streamzap_suspend, 142 .resume = streamzap_resume, 143 .id_table = streamzap_table, 144}; 145 146static void streamzap_stop_timer(struct streamzap_ir *sz) 147{ 148 unsigned long flags; 149 150 spin_lock_irqsave(&sz->timer_lock, flags); 151 if (sz->timer_running) { 152 sz->timer_running = false; 153 spin_unlock_irqrestore(&sz->timer_lock, flags); 154 del_timer_sync(&sz->delay_timer); 155 } else { 156 spin_unlock_irqrestore(&sz->timer_lock, flags); 157 } 158} 159 160static void streamzap_flush_timeout(unsigned long arg) 161{ 162 struct streamzap_ir *sz = (struct streamzap_ir *)arg; 163 164 dev_info(sz->dev, "%s: callback firing\n", __func__); 165 166 /* finally start accepting data */ 167 sz->flush = false; 168} 169 170static void streamzap_delay_timeout(unsigned long arg) 171{ 172 struct streamzap_ir *sz = (struct streamzap_ir *)arg; 173 struct ir_raw_event rawir = { .pulse = false, .duration = 0 }; 174 unsigned long flags; 175 int len, ret; 176 static unsigned long delay; 177 bool wake = false; 178 179 /* deliver data every 10 ms */ 180 delay = msecs_to_jiffies(10); 181 182 spin_lock_irqsave(&sz->timer_lock, flags); 183 184 if (kfifo_len(&sz->fifo) > 0) { 185 ret = kfifo_out(&sz->fifo, &rawir, sizeof(rawir)); 186 if (ret != sizeof(rawir)) 187 dev_err(sz->dev, "Problem w/kfifo_out...\n"); 188 ir_raw_event_store(sz->idev, &rawir); 189 wake = true; 190 } 191 192 len = kfifo_len(&sz->fifo); 193 if (len > 0) { 194 while ((len < SZ_BUF_LEN / 2) && 195 (len < SZ_BUF_LEN * sizeof(int))) { 196 ret = kfifo_out(&sz->fifo, &rawir, sizeof(rawir)); 197 if (ret != sizeof(rawir)) 198 dev_err(sz->dev, "Problem w/kfifo_out...\n"); 199 ir_raw_event_store(sz->idev, &rawir); 200 wake = true; 201 len = kfifo_len(&sz->fifo); 202 } 203 if (sz->timer_running) 204 mod_timer(&sz->delay_timer, jiffies + delay); 205 206 } else { 207 sz->timer_running = false; 208 } 209 210 if (wake) 211 ir_raw_event_handle(sz->idev); 212 213 spin_unlock_irqrestore(&sz->timer_lock, flags); 214} 215 216static void streamzap_flush_delay_buffer(struct streamzap_ir *sz) 217{ 218 struct ir_raw_event rawir = { .pulse = false, .duration = 0 }; 219 bool wake = false; 220 int ret; 221 222 while (kfifo_len(&sz->fifo) > 0) { 223 ret = kfifo_out(&sz->fifo, &rawir, sizeof(rawir)); 224 if (ret != sizeof(rawir)) 225 dev_err(sz->dev, "Problem w/kfifo_out...\n"); 226 ir_raw_event_store(sz->idev, &rawir); 227 wake = true; 228 } 229 230 if (wake) 231 ir_raw_event_handle(sz->idev); 232} 233 234static void sz_push(struct streamzap_ir *sz) 235{ 236 struct ir_raw_event rawir = { .pulse = false, .duration = 0 }; 237 unsigned long flags; 238 int ret; 239 240 spin_lock_irqsave(&sz->timer_lock, flags); 241 if (kfifo_len(&sz->fifo) >= sizeof(int) * SZ_BUF_LEN) { 242 ret = kfifo_out(&sz->fifo, &rawir, sizeof(rawir)); 243 if (ret != sizeof(rawir)) 244 dev_err(sz->dev, "Problem w/kfifo_out...\n"); 245 ir_raw_event_store(sz->idev, &rawir); 246 } 247 248 kfifo_in(&sz->fifo, &sz->rawir, sizeof(rawir)); 249 250 if (!sz->timer_running) { 251 sz->delay_timer.expires = jiffies + (HZ / 10); 252 add_timer(&sz->delay_timer); 253 sz->timer_running = true; 254 } 255 256 spin_unlock_irqrestore(&sz->timer_lock, flags); 257} 258 259static void sz_push_full_pulse(struct streamzap_ir *sz, 260 unsigned char value) 261{ 262 if (sz->idle) { 263 long deltv; 264 265 sz->signal_last = sz->signal_start; 266 do_gettimeofday(&sz->signal_start); 267 268 deltv = sz->signal_start.tv_sec - sz->signal_last.tv_sec; 269 sz->rawir.pulse = false; 270 if (deltv > 15) { 271 /* really long time */ 272 sz->rawir.duration = IR_MAX_DURATION; 273 } else { 274 sz->rawir.duration = (int)(deltv * 1000000 + 275 sz->signal_start.tv_usec - 276 sz->signal_last.tv_usec); 277 sz->rawir.duration -= sz->sum; 278 sz->rawir.duration *= 1000; 279 sz->rawir.duration &= IR_MAX_DURATION; 280 } 281 dev_dbg(sz->dev, "ls %u\n", sz->rawir.duration); 282 sz_push(sz); 283 284 sz->idle = 0; 285 sz->sum = 0; 286 } 287 288 sz->rawir.pulse = true; 289 sz->rawir.duration = ((int) value) * STREAMZAP_RESOLUTION; 290 sz->rawir.duration += STREAMZAP_RESOLUTION / 2; 291 sz->sum += sz->rawir.duration; 292 sz->rawir.duration *= 1000; 293 sz->rawir.duration &= IR_MAX_DURATION; 294 dev_dbg(sz->dev, "p %u\n", sz->rawir.duration); 295 sz_push(sz); 296} 297 298static void sz_push_half_pulse(struct streamzap_ir *sz, 299 unsigned char value) 300{ 301 sz_push_full_pulse(sz, (value & STREAMZAP_PULSE_MASK) >> 4); 302} 303 304static void sz_push_full_space(struct streamzap_ir *sz, 305 unsigned char value) 306{ 307 sz->rawir.pulse = false; 308 sz->rawir.duration = ((int) value) * STREAMZAP_RESOLUTION; 309 sz->rawir.duration += STREAMZAP_RESOLUTION / 2; 310 sz->sum += sz->rawir.duration; 311 sz->rawir.duration *= 1000; 312 dev_dbg(sz->dev, "s %u\n", sz->rawir.duration); 313 sz_push(sz); 314} 315 316static void sz_push_half_space(struct streamzap_ir *sz, 317 unsigned long value) 318{ 319 sz_push_full_space(sz, value & STREAMZAP_SPACE_MASK); 320} 321 322/** 323 * streamzap_callback - usb IRQ handler callback 324 * 325 * This procedure is invoked on reception of data from 326 * the usb remote. 327 */ 328static void streamzap_callback(struct urb *urb) 329{ 330 struct streamzap_ir *sz; 331 unsigned int i; 332 int len; 333 334 if (!urb) 335 return; 336 337 sz = urb->context; 338 len = urb->actual_length; 339 340 switch (urb->status) { 341 case -ECONNRESET: 342 case -ENOENT: 343 case -ESHUTDOWN: 344 /* 345 * this urb is terminated, clean up. 346 * sz might already be invalid at this point 347 */ 348 dev_err(sz->dev, "urb terminated, status: %d\n", urb->status); 349 return; 350 default: 351 break; 352 } 353 354 dev_dbg(sz->dev, "%s: received urb, len %d\n", __func__, len); 355 if (!sz->flush) { 356 for (i = 0; i < urb->actual_length; i++) { 357 dev_dbg(sz->dev, "%d: %x\n", i, 358 (unsigned char)sz->buf_in[i]); 359 switch (sz->decoder_state) { 360 case PulseSpace: 361 if ((sz->buf_in[i] & STREAMZAP_PULSE_MASK) == 362 STREAMZAP_PULSE_MASK) { 363 sz->decoder_state = FullPulse; 364 continue; 365 } else if ((sz->buf_in[i] & STREAMZAP_SPACE_MASK) 366 == STREAMZAP_SPACE_MASK) { 367 sz_push_half_pulse(sz, sz->buf_in[i]); 368 sz->decoder_state = FullSpace; 369 continue; 370 } else { 371 sz_push_half_pulse(sz, sz->buf_in[i]); 372 sz_push_half_space(sz, sz->buf_in[i]); 373 } 374 break; 375 case FullPulse: 376 sz_push_full_pulse(sz, sz->buf_in[i]); 377 sz->decoder_state = IgnorePulse; 378 break; 379 case FullSpace: 380 if (sz->buf_in[i] == STREAMZAP_TIMEOUT) { 381 sz->idle = 1; 382 streamzap_stop_timer(sz); 383 streamzap_flush_delay_buffer(sz); 384 } else 385 sz_push_full_space(sz, sz->buf_in[i]); 386 sz->decoder_state = PulseSpace; 387 break; 388 case IgnorePulse: 389 if ((sz->buf_in[i]&STREAMZAP_SPACE_MASK) == 390 STREAMZAP_SPACE_MASK) { 391 sz->decoder_state = FullSpace; 392 continue; 393 } 394 sz_push_half_space(sz, sz->buf_in[i]); 395 sz->decoder_state = PulseSpace; 396 break; 397 } 398 } 399 } 400 401 usb_submit_urb(urb, GFP_ATOMIC); 402 403 return; 404} 405 406static struct input_dev *streamzap_init_input_dev(struct streamzap_ir *sz) 407{ 408 struct input_dev *idev; 409 struct ir_dev_props *props; 410 struct device *dev = sz->dev; 411 int ret; 412 413 idev = input_allocate_device(); 414 if (!idev) { 415 dev_err(dev, "remote input dev allocation failed\n"); 416 goto idev_alloc_failed; 417 } 418 419 props = kzalloc(sizeof(struct ir_dev_props), GFP_KERNEL); 420 if (!props) { 421 dev_err(dev, "remote ir dev props allocation failed\n"); 422 goto props_alloc_failed; 423 } 424 425 snprintf(sz->name, sizeof(sz->name), "Streamzap PC Remote Infrared " 426 "Receiver (%04x:%04x)", 427 le16_to_cpu(sz->usbdev->descriptor.idVendor), 428 le16_to_cpu(sz->usbdev->descriptor.idProduct)); 429 430 idev->name = sz->name; 431 usb_make_path(sz->usbdev, sz->phys, sizeof(sz->phys)); 432 strlcat(sz->phys, "/input0", sizeof(sz->phys)); 433 idev->phys = sz->phys; 434 435 props->priv = sz; 436 props->driver_type = RC_DRIVER_IR_RAW; 437 props->allowed_protos = IR_TYPE_RC5 | IR_TYPE_RC6; 438 439 sz->props = props; 440 441 ret = ir_input_register(idev, RC_MAP_RC5_STREAMZAP, props, DRIVER_NAME); 442 if (ret < 0) { 443 dev_err(dev, "remote input device register failed\n"); 444 goto irdev_failed; 445 } 446 447 return idev; 448 449irdev_failed: 450 kfree(props); 451props_alloc_failed: 452 input_free_device(idev); 453idev_alloc_failed: 454 return NULL; 455} 456 457static int streamzap_delay_buf_init(struct streamzap_ir *sz) 458{ 459 int ret; 460 461 ret = kfifo_alloc(&sz->fifo, sizeof(int) * SZ_BUF_LEN, 462 GFP_KERNEL); 463 if (ret == 0) 464 sz->fifo_initialized = 1; 465 466 return ret; 467} 468 469static void streamzap_start_flush_timer(struct streamzap_ir *sz) 470{ 471 sz->flush_timer.expires = jiffies + HZ; 472 sz->flush = true; 473 add_timer(&sz->flush_timer); 474 475 sz->urb_in->dev = sz->usbdev; 476 if (usb_submit_urb(sz->urb_in, GFP_ATOMIC)) 477 dev_err(sz->dev, "urb submit failed\n"); 478} 479 480/** 481 * streamzap_probe 482 * 483 * Called by usb-core to associated with a candidate device 484 * On any failure the return value is the ERROR 485 * On success return 0 486 */ 487static int __devinit streamzap_probe(struct usb_interface *intf, 488 const struct usb_device_id *id) 489{ 490 struct usb_device *usbdev = interface_to_usbdev(intf); 491 struct usb_host_interface *iface_host; 492 struct streamzap_ir *sz = NULL; 493 char buf[63], name[128] = ""; 494 int retval = -ENOMEM; 495 int pipe, maxp; 496 497 /* Allocate space for device driver specific data */ 498 sz = kzalloc(sizeof(struct streamzap_ir), GFP_KERNEL); 499 if (!sz) 500 return -ENOMEM; 501 502 sz->usbdev = usbdev; 503 sz->interface = intf; 504 505 /* Check to ensure endpoint information matches requirements */ 506 iface_host = intf->cur_altsetting; 507 508 if (iface_host->desc.bNumEndpoints != 1) { 509 dev_err(&intf->dev, "%s: Unexpected desc.bNumEndpoints (%d)\n", 510 __func__, iface_host->desc.bNumEndpoints); 511 retval = -ENODEV; 512 goto free_sz; 513 } 514 515 sz->endpoint = &(iface_host->endpoint[0].desc); 516 if ((sz->endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) 517 != USB_DIR_IN) { 518 dev_err(&intf->dev, "%s: endpoint doesn't match input device " 519 "02%02x\n", __func__, sz->endpoint->bEndpointAddress); 520 retval = -ENODEV; 521 goto free_sz; 522 } 523 524 if ((sz->endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) 525 != USB_ENDPOINT_XFER_INT) { 526 dev_err(&intf->dev, "%s: endpoint attributes don't match xfer " 527 "02%02x\n", __func__, sz->endpoint->bmAttributes); 528 retval = -ENODEV; 529 goto free_sz; 530 } 531 532 pipe = usb_rcvintpipe(usbdev, sz->endpoint->bEndpointAddress); 533 maxp = usb_maxpacket(usbdev, pipe, usb_pipeout(pipe)); 534 535 if (maxp == 0) { 536 dev_err(&intf->dev, "%s: endpoint Max Packet Size is 0!?!\n", 537 __func__); 538 retval = -ENODEV; 539 goto free_sz; 540 } 541 542 /* Allocate the USB buffer and IRQ URB */ 543 sz->buf_in = usb_alloc_coherent(usbdev, maxp, GFP_ATOMIC, &sz->dma_in); 544 if (!sz->buf_in) 545 goto free_sz; 546 547 sz->urb_in = usb_alloc_urb(0, GFP_KERNEL); 548 if (!sz->urb_in) 549 goto free_buf_in; 550 551 sz->dev = &intf->dev; 552 sz->buf_in_len = maxp; 553 554 if (usbdev->descriptor.iManufacturer 555 && usb_string(usbdev, usbdev->descriptor.iManufacturer, 556 buf, sizeof(buf)) > 0) 557 strlcpy(name, buf, sizeof(name)); 558 559 if (usbdev->descriptor.iProduct 560 && usb_string(usbdev, usbdev->descriptor.iProduct, 561 buf, sizeof(buf)) > 0) 562 snprintf(name + strlen(name), sizeof(name) - strlen(name), 563 " %s", buf); 564 565 retval = streamzap_delay_buf_init(sz); 566 if (retval) { 567 dev_err(&intf->dev, "%s: delay buffer init failed\n", __func__); 568 goto free_urb_in; 569 } 570 571 sz->idev = streamzap_init_input_dev(sz); 572 if (!sz->idev) 573 goto input_dev_fail; 574 575 sz->idle = true; 576 sz->decoder_state = PulseSpace; 577 578 init_timer(&sz->delay_timer); 579 sz->delay_timer.function = streamzap_delay_timeout; 580 sz->delay_timer.data = (unsigned long)sz; 581 spin_lock_init(&sz->timer_lock); 582 583 init_timer(&sz->flush_timer); 584 sz->flush_timer.function = streamzap_flush_timeout; 585 sz->flush_timer.data = (unsigned long)sz; 586 587 do_gettimeofday(&sz->signal_start); 588 589 /* Complete final initialisations */ 590 usb_fill_int_urb(sz->urb_in, usbdev, pipe, sz->buf_in, 591 maxp, (usb_complete_t)streamzap_callback, 592 sz, sz->endpoint->bInterval); 593 sz->urb_in->transfer_dma = sz->dma_in; 594 sz->urb_in->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 595 596 usb_set_intfdata(intf, sz); 597 598 streamzap_start_flush_timer(sz); 599 600 dev_info(sz->dev, "Registered %s on usb%d:%d\n", name, 601 usbdev->bus->busnum, usbdev->devnum); 602 603 return 0; 604 605input_dev_fail: 606 kfifo_free(&sz->fifo); 607free_urb_in: 608 usb_free_urb(sz->urb_in); 609free_buf_in: 610 usb_free_coherent(usbdev, maxp, sz->buf_in, sz->dma_in); 611free_sz: 612 kfree(sz); 613 614 return retval; 615} 616 617/** 618 * streamzap_disconnect 619 * 620 * Called by the usb core when the device is removed from the system. 621 * 622 * This routine guarantees that the driver will not submit any more urbs 623 * by clearing dev->usbdev. It is also supposed to terminate any currently 624 * active urbs. Unfortunately, usb_bulk_msg(), used in streamzap_read(), 625 * does not provide any way to do this. 626 */ 627static void streamzap_disconnect(struct usb_interface *interface) 628{ 629 struct streamzap_ir *sz = usb_get_intfdata(interface); 630 struct usb_device *usbdev = interface_to_usbdev(interface); 631 632 usb_set_intfdata(interface, NULL); 633 634 if (!sz) 635 return; 636 637 if (sz->flush) { 638 sz->flush = false; 639 del_timer_sync(&sz->flush_timer); 640 } 641 642 streamzap_stop_timer(sz); 643 644 sz->usbdev = NULL; 645 ir_input_unregister(sz->idev); 646 usb_kill_urb(sz->urb_in); 647 usb_free_urb(sz->urb_in); 648 usb_free_coherent(usbdev, sz->buf_in_len, sz->buf_in, sz->dma_in); 649 650 kfree(sz); 651} 652 653static int streamzap_suspend(struct usb_interface *intf, pm_message_t message) 654{ 655 struct streamzap_ir *sz = usb_get_intfdata(intf); 656 657 if (sz->flush) { 658 sz->flush = false; 659 del_timer_sync(&sz->flush_timer); 660 } 661 662 streamzap_stop_timer(sz); 663 664 usb_kill_urb(sz->urb_in); 665 666 return 0; 667} 668 669static int streamzap_resume(struct usb_interface *intf) 670{ 671 struct streamzap_ir *sz = usb_get_intfdata(intf); 672 673 if (sz->fifo_initialized) 674 kfifo_reset(&sz->fifo); 675 676 sz->flush_timer.expires = jiffies + HZ; 677 sz->flush = true; 678 add_timer(&sz->flush_timer); 679 680 if (usb_submit_urb(sz->urb_in, GFP_ATOMIC)) { 681 dev_err(sz->dev, "Error sumbiting urb\n"); 682 return -EIO; 683 } 684 685 return 0; 686} 687 688/** 689 * streamzap_init 690 */ 691static int __init streamzap_init(void) 692{ 693 int ret; 694 695 /* register this driver with the USB subsystem */ 696 ret = usb_register(&streamzap_driver); 697 if (ret < 0) 698 printk(KERN_ERR DRIVER_NAME ": usb register failed, " 699 "result = %d\n", ret); 700 701 return ret; 702} 703 704/** 705 * streamzap_exit 706 */ 707static void __exit streamzap_exit(void) 708{ 709 usb_deregister(&streamzap_driver); 710} 711 712 713module_init(streamzap_init); 714module_exit(streamzap_exit); 715 716MODULE_AUTHOR("Jarod Wilson <jarod@wilsonet.com>"); 717MODULE_DESCRIPTION(DRIVER_DESC); 718MODULE_LICENSE("GPL"); 719 720module_param(debug, bool, S_IRUGO | S_IWUSR); 721MODULE_PARM_DESC(debug, "Enable debugging messages"); 722