/drivers/media/video/hdpvr/hdpvr-core.c
C | 478 lines | 376 code | 69 blank | 33 comment | 39 complexity | 68f58a64e7d90a530ef0d67140dbacf4 MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
1/* 2 * Hauppauge HD PVR USB driver 3 * 4 * Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com) 5 * Copyright (C) 2008 Janne Grunau (j@jannau.net) 6 * Copyright (C) 2008 John Poet 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License as 10 * published by the Free Software Foundation, version 2. 11 * 12 */ 13 14#include <linux/kernel.h> 15#include <linux/errno.h> 16#include <linux/init.h> 17#include <linux/slab.h> 18#include <linux/module.h> 19#include <linux/uaccess.h> 20#include <asm/atomic.h> 21#include <linux/usb.h> 22#include <linux/mutex.h> 23#include <linux/i2c.h> 24 25#include <linux/videodev2.h> 26#include <media/v4l2-dev.h> 27#include <media/v4l2-common.h> 28 29#include "hdpvr.h" 30 31static int video_nr[HDPVR_MAX] = {[0 ... (HDPVR_MAX - 1)] = UNSET}; 32module_param_array(video_nr, int, NULL, 0); 33MODULE_PARM_DESC(video_nr, "video device number (-1=Auto)"); 34 35/* holds the number of currently registered devices */ 36static atomic_t dev_nr = ATOMIC_INIT(-1); 37 38int hdpvr_debug; 39module_param(hdpvr_debug, int, S_IRUGO|S_IWUSR); 40MODULE_PARM_DESC(hdpvr_debug, "enable debugging output"); 41 42static uint default_video_input = HDPVR_VIDEO_INPUTS; 43module_param(default_video_input, uint, S_IRUGO|S_IWUSR); 44MODULE_PARM_DESC(default_video_input, "default video input: 0=Component / " 45 "1=S-Video / 2=Composite"); 46 47static uint default_audio_input = HDPVR_AUDIO_INPUTS; 48module_param(default_audio_input, uint, S_IRUGO|S_IWUSR); 49MODULE_PARM_DESC(default_audio_input, "default audio input: 0=RCA back / " 50 "1=RCA front / 2=S/PDIF"); 51 52static int boost_audio; 53module_param(boost_audio, bool, S_IRUGO|S_IWUSR); 54MODULE_PARM_DESC(boost_audio, "boost the audio signal"); 55 56 57/* table of devices that work with this driver */ 58static struct usb_device_id hdpvr_table[] = { 59 { USB_DEVICE(HD_PVR_VENDOR_ID, HD_PVR_PRODUCT_ID) }, 60 { USB_DEVICE(HD_PVR_VENDOR_ID, HD_PVR_PRODUCT_ID1) }, 61 { USB_DEVICE(HD_PVR_VENDOR_ID, HD_PVR_PRODUCT_ID2) }, 62 { USB_DEVICE(HD_PVR_VENDOR_ID, HD_PVR_PRODUCT_ID3) }, 63 { USB_DEVICE(HD_PVR_VENDOR_ID, HD_PVR_PRODUCT_ID4) }, 64 { } /* Terminating entry */ 65}; 66MODULE_DEVICE_TABLE(usb, hdpvr_table); 67 68 69void hdpvr_delete(struct hdpvr_device *dev) 70{ 71 hdpvr_free_buffers(dev); 72 73 if (dev->video_dev) 74 video_device_release(dev->video_dev); 75 76 usb_put_dev(dev->udev); 77} 78 79static void challenge(u8 *bytes) 80{ 81 u64 *i64P, tmp64; 82 uint i, idx; 83 84 for (idx = 0; idx < 32; ++idx) { 85 86 if (idx & 0x3) 87 bytes[(idx >> 3) + 3] = bytes[(idx >> 2) & 0x3]; 88 89 switch (idx & 0x3) { 90 case 0x3: 91 bytes[2] += bytes[3] * 4 + bytes[4] + bytes[5]; 92 bytes[4] += bytes[(idx & 0x1) * 2] * 9 + 9; 93 break; 94 case 0x1: 95 bytes[0] *= 8; 96 bytes[0] += 7*idx + 4; 97 bytes[6] += bytes[3] * 3; 98 break; 99 case 0x0: 100 bytes[3 - (idx >> 3)] = bytes[idx >> 2]; 101 bytes[5] += bytes[6] * 3; 102 for (i = 0; i < 3; i++) 103 bytes[3] *= bytes[3] + 1; 104 break; 105 case 0x2: 106 for (i = 0; i < 3; i++) 107 bytes[1] *= bytes[6] + 1; 108 for (i = 0; i < 3; i++) { 109 i64P = (u64 *)bytes; 110 tmp64 = le64_to_cpup(i64P); 111 tmp64 <<= bytes[7] & 0x0f; 112 *i64P += cpu_to_le64(tmp64); 113 } 114 break; 115 } 116 } 117} 118 119/* try to init the device like the windows driver */ 120static int device_authorization(struct hdpvr_device *dev) 121{ 122 123 int ret, retval = -ENOMEM; 124 char request_type = 0x38, rcv_request = 0x81; 125 char *response; 126#ifdef HDPVR_DEBUG 127 size_t buf_size = 46; 128 char *print_buf = kzalloc(5*buf_size+1, GFP_KERNEL); 129 if (!print_buf) { 130 v4l2_err(&dev->v4l2_dev, "Out of memory\n"); 131 return retval; 132 } 133#endif 134 135 mutex_lock(&dev->usbc_mutex); 136 ret = usb_control_msg(dev->udev, 137 usb_rcvctrlpipe(dev->udev, 0), 138 rcv_request, 0x80 | request_type, 139 0x0400, 0x0003, 140 dev->usbc_buf, 46, 141 10000); 142 if (ret != 46) { 143 v4l2_err(&dev->v4l2_dev, 144 "unexpected answer of status request, len %d\n", ret); 145 goto unlock; 146 } 147#ifdef HDPVR_DEBUG 148 else { 149 hex_dump_to_buffer(dev->usbc_buf, 46, 16, 1, print_buf, 150 5*buf_size+1, 0); 151 v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev, 152 "Status request returned, len %d: %s\n", 153 ret, print_buf); 154 } 155#endif 156 157 v4l2_info(&dev->v4l2_dev, "firmware version 0x%x dated %s\n", 158 dev->usbc_buf[1], &dev->usbc_buf[2]); 159 160 switch (dev->usbc_buf[1]) { 161 case HDPVR_FIRMWARE_VERSION: 162 dev->flags &= ~HDPVR_FLAG_AC3_CAP; 163 break; 164 case HDPVR_FIRMWARE_VERSION_AC3: 165 case HDPVR_FIRMWARE_VERSION_0X12: 166 case HDPVR_FIRMWARE_VERSION_0X15: 167 dev->flags |= HDPVR_FLAG_AC3_CAP; 168 break; 169 default: 170 v4l2_info(&dev->v4l2_dev, "untested firmware, the driver might" 171 " not work.\n"); 172 if (dev->usbc_buf[1] >= HDPVR_FIRMWARE_VERSION_AC3) 173 dev->flags |= HDPVR_FLAG_AC3_CAP; 174 else 175 dev->flags &= ~HDPVR_FLAG_AC3_CAP; 176 } 177 178 response = dev->usbc_buf+38; 179#ifdef HDPVR_DEBUG 180 hex_dump_to_buffer(response, 8, 16, 1, print_buf, 5*buf_size+1, 0); 181 v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev, "challenge: %s\n", 182 print_buf); 183#endif 184 challenge(response); 185#ifdef HDPVR_DEBUG 186 hex_dump_to_buffer(response, 8, 16, 1, print_buf, 5*buf_size+1, 0); 187 v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev, " response: %s\n", 188 print_buf); 189#endif 190 191 msleep(100); 192 ret = usb_control_msg(dev->udev, 193 usb_sndctrlpipe(dev->udev, 0), 194 0xd1, 0x00 | request_type, 195 0x0000, 0x0000, 196 response, 8, 197 10000); 198 v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev, 199 "magic request returned %d\n", ret); 200 201 retval = ret != 8; 202unlock: 203 mutex_unlock(&dev->usbc_mutex); 204 return retval; 205} 206 207static int hdpvr_device_init(struct hdpvr_device *dev) 208{ 209 int ret; 210 u8 *buf; 211 struct hdpvr_video_info *vidinf; 212 213 if (device_authorization(dev)) 214 return -EACCES; 215 216 /* default options for init */ 217 hdpvr_set_options(dev); 218 219 /* set filter options */ 220 mutex_lock(&dev->usbc_mutex); 221 buf = dev->usbc_buf; 222 buf[0] = 0x03; buf[1] = 0x03; buf[2] = 0x00; buf[3] = 0x00; 223 ret = usb_control_msg(dev->udev, 224 usb_sndctrlpipe(dev->udev, 0), 225 0x01, 0x38, 226 CTRL_LOW_PASS_FILTER_VALUE, CTRL_DEFAULT_INDEX, 227 buf, 4, 228 1000); 229 v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev, 230 "control request returned %d\n", ret); 231 mutex_unlock(&dev->usbc_mutex); 232 233 vidinf = get_video_info(dev); 234 if (!vidinf) 235 v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev, 236 "no valid video signal or device init failed\n"); 237 else 238 kfree(vidinf); 239 240 /* enable fan and bling leds */ 241 mutex_lock(&dev->usbc_mutex); 242 buf[0] = 0x1; 243 ret = usb_control_msg(dev->udev, 244 usb_sndctrlpipe(dev->udev, 0), 245 0xd4, 0x38, 0, 0, buf, 1, 246 1000); 247 v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev, 248 "control request returned %d\n", ret); 249 250 /* boost analog audio */ 251 buf[0] = boost_audio; 252 ret = usb_control_msg(dev->udev, 253 usb_sndctrlpipe(dev->udev, 0), 254 0xd5, 0x38, 0, 0, buf, 1, 255 1000); 256 v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev, 257 "control request returned %d\n", ret); 258 mutex_unlock(&dev->usbc_mutex); 259 260 dev->status = STATUS_IDLE; 261 return 0; 262} 263 264static const struct hdpvr_options hdpvr_default_options = { 265 .video_std = HDPVR_60HZ, 266 .video_input = HDPVR_COMPONENT, 267 .audio_input = HDPVR_RCA_BACK, 268 .bitrate = 65, /* 6 mbps */ 269 .peak_bitrate = 90, /* 9 mbps */ 270 .bitrate_mode = HDPVR_CONSTANT, 271 .gop_mode = HDPVR_SIMPLE_IDR_GOP, 272 .audio_codec = V4L2_MPEG_AUDIO_ENCODING_AAC, 273 .brightness = 0x86, 274 .contrast = 0x80, 275 .hue = 0x80, 276 .saturation = 0x80, 277 .sharpness = 0x80, 278}; 279 280static int hdpvr_probe(struct usb_interface *interface, 281 const struct usb_device_id *id) 282{ 283 struct hdpvr_device *dev; 284 struct usb_host_interface *iface_desc; 285 struct usb_endpoint_descriptor *endpoint; 286 struct i2c_client *client; 287 size_t buffer_size; 288 int i; 289 int retval = -ENOMEM; 290 291 /* allocate memory for our device state and initialize it */ 292 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 293 if (!dev) { 294 err("Out of memory"); 295 goto error; 296 } 297 298 dev->workqueue = 0; 299 300 /* register v4l2_device early so it can be used for printks */ 301 if (v4l2_device_register(&interface->dev, &dev->v4l2_dev)) { 302 err("v4l2_device_register failed"); 303 goto error; 304 } 305 306 mutex_init(&dev->io_mutex); 307 mutex_init(&dev->i2c_mutex); 308 mutex_init(&dev->usbc_mutex); 309 dev->usbc_buf = kmalloc(64, GFP_KERNEL); 310 if (!dev->usbc_buf) { 311 v4l2_err(&dev->v4l2_dev, "Out of memory\n"); 312 goto error; 313 } 314 315 init_waitqueue_head(&dev->wait_buffer); 316 init_waitqueue_head(&dev->wait_data); 317 318 dev->workqueue = create_singlethread_workqueue("hdpvr_buffer"); 319 if (!dev->workqueue) 320 goto error; 321 322 /* init video transfer queues */ 323 INIT_LIST_HEAD(&dev->free_buff_list); 324 INIT_LIST_HEAD(&dev->rec_buff_list); 325 326 dev->options = hdpvr_default_options; 327 328 if (default_video_input < HDPVR_VIDEO_INPUTS) 329 dev->options.video_input = default_video_input; 330 331 if (default_audio_input < HDPVR_AUDIO_INPUTS) { 332 dev->options.audio_input = default_audio_input; 333 if (default_audio_input == HDPVR_SPDIF) 334 dev->options.audio_codec = 335 V4L2_MPEG_AUDIO_ENCODING_AC3; 336 } 337 338 dev->udev = usb_get_dev(interface_to_usbdev(interface)); 339 340 /* set up the endpoint information */ 341 /* use only the first bulk-in and bulk-out endpoints */ 342 iface_desc = interface->cur_altsetting; 343 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { 344 endpoint = &iface_desc->endpoint[i].desc; 345 346 if (!dev->bulk_in_endpointAddr && 347 usb_endpoint_is_bulk_in(endpoint)) { 348 /* USB interface description is buggy, reported max 349 * packet size is 512 bytes, windows driver uses 8192 */ 350 buffer_size = 8192; 351 dev->bulk_in_size = buffer_size; 352 dev->bulk_in_endpointAddr = endpoint->bEndpointAddress; 353 } 354 355 } 356 if (!dev->bulk_in_endpointAddr) { 357 v4l2_err(&dev->v4l2_dev, "Could not find bulk-in endpoint\n"); 358 goto error; 359 } 360 361 /* init the device */ 362 if (hdpvr_device_init(dev)) { 363 v4l2_err(&dev->v4l2_dev, "device init failed\n"); 364 goto error; 365 } 366 367 mutex_lock(&dev->io_mutex); 368 if (hdpvr_alloc_buffers(dev, NUM_BUFFERS)) { 369 mutex_unlock(&dev->io_mutex); 370 v4l2_err(&dev->v4l2_dev, 371 "allocating transfer buffers failed\n"); 372 goto error; 373 } 374 mutex_unlock(&dev->io_mutex); 375 376 if (hdpvr_register_videodev(dev, &interface->dev, 377 video_nr[atomic_inc_return(&dev_nr)])) { 378 v4l2_err(&dev->v4l2_dev, "registering videodev failed\n"); 379 goto error; 380 } 381 382#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 383 retval = hdpvr_register_i2c_adapter(dev); 384 if (retval < 0) { 385 v4l2_err(&dev->v4l2_dev, "i2c adapter register failed\n"); 386 goto error; 387 } 388 389 client = hdpvr_register_ir_rx_i2c(dev); 390 if (!client) { 391 v4l2_err(&dev->v4l2_dev, "i2c IR RX device register failed\n"); 392 goto reg_fail; 393 } 394 395 client = hdpvr_register_ir_tx_i2c(dev); 396 if (!client) { 397 v4l2_err(&dev->v4l2_dev, "i2c IR TX device register failed\n"); 398 goto reg_fail; 399 } 400#endif 401 402 /* let the user know what node this device is now attached to */ 403 v4l2_info(&dev->v4l2_dev, "device now attached to %s\n", 404 video_device_node_name(dev->video_dev)); 405 return 0; 406 407reg_fail: 408#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 409 i2c_del_adapter(&dev->i2c_adapter); 410#endif 411error: 412 if (dev) { 413 /* Destroy single thread */ 414 if (dev->workqueue) 415 destroy_workqueue(dev->workqueue); 416 /* this frees allocated memory */ 417 hdpvr_delete(dev); 418 } 419 return retval; 420} 421 422static void hdpvr_disconnect(struct usb_interface *interface) 423{ 424 struct hdpvr_device *dev = to_hdpvr_dev(usb_get_intfdata(interface)); 425 426 v4l2_info(&dev->v4l2_dev, "device %s disconnected\n", 427 video_device_node_name(dev->video_dev)); 428 /* prevent more I/O from starting and stop any ongoing */ 429 mutex_lock(&dev->io_mutex); 430 dev->status = STATUS_DISCONNECTED; 431 wake_up_interruptible(&dev->wait_data); 432 wake_up_interruptible(&dev->wait_buffer); 433 mutex_unlock(&dev->io_mutex); 434 v4l2_device_disconnect(&dev->v4l2_dev); 435 msleep(100); 436 flush_workqueue(dev->workqueue); 437 mutex_lock(&dev->io_mutex); 438 hdpvr_cancel_queue(dev); 439 mutex_unlock(&dev->io_mutex); 440#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 441 i2c_del_adapter(&dev->i2c_adapter); 442#endif 443 video_unregister_device(dev->video_dev); 444 atomic_dec(&dev_nr); 445} 446 447 448static struct usb_driver hdpvr_usb_driver = { 449 .name = "hdpvr", 450 .probe = hdpvr_probe, 451 .disconnect = hdpvr_disconnect, 452 .id_table = hdpvr_table, 453}; 454 455static int __init hdpvr_init(void) 456{ 457 int result; 458 459 /* register this driver with the USB subsystem */ 460 result = usb_register(&hdpvr_usb_driver); 461 if (result) 462 err("usb_register failed. Error number %d", result); 463 464 return result; 465} 466 467static void __exit hdpvr_exit(void) 468{ 469 /* deregister this driver with the USB subsystem */ 470 usb_deregister(&hdpvr_usb_driver); 471} 472 473module_init(hdpvr_init); 474module_exit(hdpvr_exit); 475 476MODULE_LICENSE("GPL"); 477MODULE_AUTHOR("Janne Grunau"); 478MODULE_DESCRIPTION("Hauppauge HD PVR driver");