linux/drivers/media/video/hdpvr/hdpvr-core.c
<<
>>
Prefs
   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        { }                                     /* Terminating entry */
  64};
  65MODULE_DEVICE_TABLE(usb, hdpvr_table);
  66
  67
  68void hdpvr_delete(struct hdpvr_device *dev)
  69{
  70        hdpvr_free_buffers(dev);
  71
  72        if (dev->video_dev)
  73                video_device_release(dev->video_dev);
  74
  75        usb_put_dev(dev->udev);
  76}
  77
  78static void challenge(u8 *bytes)
  79{
  80        u64 *i64P, tmp64;
  81        uint i, idx;
  82
  83        for (idx = 0; idx < 32; ++idx) {
  84
  85                if (idx & 0x3)
  86                        bytes[(idx >> 3) + 3] = bytes[(idx >> 2) & 0x3];
  87
  88                switch (idx & 0x3) {
  89                case 0x3:
  90                        bytes[2] += bytes[3] * 4 + bytes[4] + bytes[5];
  91                        bytes[4] += bytes[(idx & 0x1) * 2] * 9 + 9;
  92                        break;
  93                case 0x1:
  94                        bytes[0] *= 8;
  95                        bytes[0] += 7*idx + 4;
  96                        bytes[6] += bytes[3] * 3;
  97                        break;
  98                case 0x0:
  99                        bytes[3 - (idx >> 3)] = bytes[idx >> 2];
 100                        bytes[5] += bytes[6] * 3;
 101                        for (i = 0; i < 3; i++)
 102                                bytes[3] *= bytes[3] + 1;
 103                        break;
 104                case 0x2:
 105                        for (i = 0; i < 3; i++)
 106                                bytes[1] *= bytes[6] + 1;
 107                        for (i = 0; i < 3; i++) {
 108                                i64P = (u64 *)bytes;
 109                                tmp64 = le64_to_cpup(i64P);
 110                                tmp64 <<= bytes[7] & 0x0f;
 111                                *i64P += cpu_to_le64(tmp64);
 112                        }
 113                        break;
 114                }
 115        }
 116}
 117
 118/* try to init the device like the windows driver */
 119static int device_authorization(struct hdpvr_device *dev)
 120{
 121
 122        int ret, retval = -ENOMEM;
 123        char request_type = 0x38, rcv_request = 0x81;
 124        char *response;
 125#ifdef HDPVR_DEBUG
 126        size_t buf_size = 46;
 127        char *print_buf = kzalloc(5*buf_size+1, GFP_KERNEL);
 128        if (!print_buf) {
 129                v4l2_err(&dev->v4l2_dev, "Out of memory\n");
 130                return retval;
 131        }
 132#endif
 133
 134        mutex_lock(&dev->usbc_mutex);
 135        ret = usb_control_msg(dev->udev,
 136                              usb_rcvctrlpipe(dev->udev, 0),
 137                              rcv_request, 0x80 | request_type,
 138                              0x0400, 0x0003,
 139                              dev->usbc_buf, 46,
 140                              10000);
 141        if (ret != 46) {
 142                v4l2_err(&dev->v4l2_dev,
 143                         "unexpected answer of status request, len %d\n", ret);
 144                goto unlock;
 145        }
 146#ifdef HDPVR_DEBUG
 147        else {
 148                hex_dump_to_buffer(dev->usbc_buf, 46, 16, 1, print_buf,
 149                                   5*buf_size+1, 0);
 150                v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
 151                         "Status request returned, len %d: %s\n",
 152                         ret, print_buf);
 153        }
 154#endif
 155        if (dev->usbc_buf[1] == HDPVR_FIRMWARE_VERSION) {
 156                dev->flags &= ~HDPVR_FLAG_AC3_CAP;
 157        } else if (dev->usbc_buf[1] == HDPVR_FIRMWARE_VERSION_AC3) {
 158                dev->flags |= HDPVR_FLAG_AC3_CAP;
 159        } else if (dev->usbc_buf[1] > HDPVR_FIRMWARE_VERSION_AC3) {
 160                v4l2_info(&dev->v4l2_dev, "untested firmware version 0x%x, "
 161                          "the driver might not work\n", dev->usbc_buf[1]);
 162                dev->flags |= HDPVR_FLAG_AC3_CAP;
 163        } else {
 164                v4l2_err(&dev->v4l2_dev, "unknown firmware version 0x%x\n",
 165                        dev->usbc_buf[1]);
 166                ret = -EINVAL;
 167                goto unlock;
 168        }
 169
 170        response = dev->usbc_buf+38;
 171#ifdef HDPVR_DEBUG
 172        hex_dump_to_buffer(response, 8, 16, 1, print_buf, 5*buf_size+1, 0);
 173        v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev, "challenge: %s\n",
 174                 print_buf);
 175#endif
 176        challenge(response);
 177#ifdef HDPVR_DEBUG
 178        hex_dump_to_buffer(response, 8, 16, 1, print_buf, 5*buf_size+1, 0);
 179        v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev, " response: %s\n",
 180                 print_buf);
 181#endif
 182
 183        msleep(100);
 184        ret = usb_control_msg(dev->udev,
 185                              usb_sndctrlpipe(dev->udev, 0),
 186                              0xd1, 0x00 | request_type,
 187                              0x0000, 0x0000,
 188                              response, 8,
 189                              10000);
 190        v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
 191                 "magic request returned %d\n", ret);
 192
 193        retval = ret != 8;
 194unlock:
 195        mutex_unlock(&dev->usbc_mutex);
 196        return retval;
 197}
 198
 199static int hdpvr_device_init(struct hdpvr_device *dev)
 200{
 201        int ret;
 202        u8 *buf;
 203        struct hdpvr_video_info *vidinf;
 204
 205        if (device_authorization(dev))
 206                return -EACCES;
 207
 208        /* default options for init */
 209        hdpvr_set_options(dev);
 210
 211        /* set filter options */
 212        mutex_lock(&dev->usbc_mutex);
 213        buf = dev->usbc_buf;
 214        buf[0] = 0x03; buf[1] = 0x03; buf[2] = 0x00; buf[3] = 0x00;
 215        ret = usb_control_msg(dev->udev,
 216                              usb_sndctrlpipe(dev->udev, 0),
 217                              0x01, 0x38,
 218                              CTRL_LOW_PASS_FILTER_VALUE, CTRL_DEFAULT_INDEX,
 219                              buf, 4,
 220                              1000);
 221        v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
 222                 "control request returned %d\n", ret);
 223        mutex_unlock(&dev->usbc_mutex);
 224
 225        vidinf = get_video_info(dev);
 226        if (!vidinf)
 227                v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
 228                        "no valid video signal or device init failed\n");
 229        else
 230                kfree(vidinf);
 231
 232        /* enable fan and bling leds */
 233        mutex_lock(&dev->usbc_mutex);
 234        buf[0] = 0x1;
 235        ret = usb_control_msg(dev->udev,
 236                              usb_sndctrlpipe(dev->udev, 0),
 237                              0xd4, 0x38, 0, 0, buf, 1,
 238                              1000);
 239        v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
 240                 "control request returned %d\n", ret);
 241
 242        /* boost analog audio */
 243        buf[0] = boost_audio;
 244        ret = usb_control_msg(dev->udev,
 245                              usb_sndctrlpipe(dev->udev, 0),
 246                              0xd5, 0x38, 0, 0, buf, 1,
 247                              1000);
 248        v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
 249                 "control request returned %d\n", ret);
 250        mutex_unlock(&dev->usbc_mutex);
 251
 252        dev->status = STATUS_IDLE;
 253        return 0;
 254}
 255
 256static const struct hdpvr_options hdpvr_default_options = {
 257        .video_std      = HDPVR_60HZ,
 258        .video_input    = HDPVR_COMPONENT,
 259        .audio_input    = HDPVR_RCA_BACK,
 260        .bitrate        = 65, /* 6 mbps */
 261        .peak_bitrate   = 90, /* 9 mbps */
 262        .bitrate_mode   = HDPVR_CONSTANT,
 263        .gop_mode       = HDPVR_SIMPLE_IDR_GOP,
 264        .audio_codec    = V4L2_MPEG_AUDIO_ENCODING_AAC,
 265        .brightness     = 0x86,
 266        .contrast       = 0x80,
 267        .hue            = 0x80,
 268        .saturation     = 0x80,
 269        .sharpness      = 0x80,
 270};
 271
 272static int hdpvr_probe(struct usb_interface *interface,
 273                       const struct usb_device_id *id)
 274{
 275        struct hdpvr_device *dev;
 276        struct usb_host_interface *iface_desc;
 277        struct usb_endpoint_descriptor *endpoint;
 278        size_t buffer_size;
 279        int i;
 280        int retval = -ENOMEM;
 281
 282        /* allocate memory for our device state and initialize it */
 283        dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 284        if (!dev) {
 285                err("Out of memory");
 286                goto error;
 287        }
 288
 289        /* register v4l2_device early so it can be used for printks */
 290        if (v4l2_device_register(&interface->dev, &dev->v4l2_dev)) {
 291                err("v4l2_device_register failed");
 292                goto error;
 293        }
 294
 295        mutex_init(&dev->io_mutex);
 296        mutex_init(&dev->i2c_mutex);
 297        mutex_init(&dev->usbc_mutex);
 298        dev->usbc_buf = kmalloc(64, GFP_KERNEL);
 299        if (!dev->usbc_buf) {
 300                v4l2_err(&dev->v4l2_dev, "Out of memory\n");
 301                goto error;
 302        }
 303
 304        init_waitqueue_head(&dev->wait_buffer);
 305        init_waitqueue_head(&dev->wait_data);
 306
 307        dev->workqueue = create_singlethread_workqueue("hdpvr_buffer");
 308        if (!dev->workqueue)
 309                goto error;
 310
 311        /* init video transfer queues */
 312        INIT_LIST_HEAD(&dev->free_buff_list);
 313        INIT_LIST_HEAD(&dev->rec_buff_list);
 314
 315        dev->options = hdpvr_default_options;
 316
 317        if (default_video_input < HDPVR_VIDEO_INPUTS)
 318                dev->options.video_input = default_video_input;
 319
 320        if (default_audio_input < HDPVR_AUDIO_INPUTS)
 321                dev->options.audio_input = default_audio_input;
 322
 323        dev->udev = usb_get_dev(interface_to_usbdev(interface));
 324
 325        /* set up the endpoint information */
 326        /* use only the first bulk-in and bulk-out endpoints */
 327        iface_desc = interface->cur_altsetting;
 328        for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
 329                endpoint = &iface_desc->endpoint[i].desc;
 330
 331                if (!dev->bulk_in_endpointAddr &&
 332                    usb_endpoint_is_bulk_in(endpoint)) {
 333                        /* USB interface description is buggy, reported max
 334                         * packet size is 512 bytes, windows driver uses 8192 */
 335                        buffer_size = 8192;
 336                        dev->bulk_in_size = buffer_size;
 337                        dev->bulk_in_endpointAddr = endpoint->bEndpointAddress;
 338                }
 339
 340        }
 341        if (!dev->bulk_in_endpointAddr) {
 342                v4l2_err(&dev->v4l2_dev, "Could not find bulk-in endpoint\n");
 343                goto error;
 344        }
 345
 346        /* init the device */
 347        if (hdpvr_device_init(dev)) {
 348                v4l2_err(&dev->v4l2_dev, "device init failed\n");
 349                goto error;
 350        }
 351
 352        mutex_lock(&dev->io_mutex);
 353        if (hdpvr_alloc_buffers(dev, NUM_BUFFERS)) {
 354                mutex_unlock(&dev->io_mutex);
 355                v4l2_err(&dev->v4l2_dev,
 356                         "allocating transfer buffers failed\n");
 357                goto error;
 358        }
 359        mutex_unlock(&dev->io_mutex);
 360
 361        if (hdpvr_register_videodev(dev, &interface->dev,
 362                                    video_nr[atomic_inc_return(&dev_nr)])) {
 363                v4l2_err(&dev->v4l2_dev, "registering videodev failed\n");
 364                goto error;
 365        }
 366
 367#ifdef CONFIG_I2C
 368        /* until i2c is working properly */
 369        retval = 0; /* hdpvr_register_i2c_adapter(dev); */
 370        if (retval < 0) {
 371                v4l2_err(&dev->v4l2_dev, "registering i2c adapter failed\n");
 372                goto error;
 373        }
 374#endif /* CONFIG_I2C */
 375
 376        /* let the user know what node this device is now attached to */
 377        v4l2_info(&dev->v4l2_dev, "device now attached to %s\n",
 378                  video_device_node_name(dev->video_dev));
 379        return 0;
 380
 381error:
 382        if (dev) {
 383                /* this frees allocated memory */
 384                hdpvr_delete(dev);
 385        }
 386        return retval;
 387}
 388
 389static void hdpvr_disconnect(struct usb_interface *interface)
 390{
 391        struct hdpvr_device *dev = to_hdpvr_dev(usb_get_intfdata(interface));
 392
 393        v4l2_info(&dev->v4l2_dev, "device %s disconnected\n",
 394                  video_device_node_name(dev->video_dev));
 395        /* prevent more I/O from starting and stop any ongoing */
 396        mutex_lock(&dev->io_mutex);
 397        dev->status = STATUS_DISCONNECTED;
 398        wake_up_interruptible(&dev->wait_data);
 399        wake_up_interruptible(&dev->wait_buffer);
 400        mutex_unlock(&dev->io_mutex);
 401        v4l2_device_disconnect(&dev->v4l2_dev);
 402        msleep(100);
 403        flush_workqueue(dev->workqueue);
 404        mutex_lock(&dev->io_mutex);
 405        hdpvr_cancel_queue(dev);
 406        mutex_unlock(&dev->io_mutex);
 407        video_unregister_device(dev->video_dev);
 408        atomic_dec(&dev_nr);
 409}
 410
 411
 412static struct usb_driver hdpvr_usb_driver = {
 413        .name =         "hdpvr",
 414        .probe =        hdpvr_probe,
 415        .disconnect =   hdpvr_disconnect,
 416        .id_table =     hdpvr_table,
 417};
 418
 419static int __init hdpvr_init(void)
 420{
 421        int result;
 422
 423        /* register this driver with the USB subsystem */
 424        result = usb_register(&hdpvr_usb_driver);
 425        if (result)
 426                err("usb_register failed. Error number %d", result);
 427
 428        return result;
 429}
 430
 431static void __exit hdpvr_exit(void)
 432{
 433        /* deregister this driver with the USB subsystem */
 434        usb_deregister(&hdpvr_usb_driver);
 435}
 436
 437module_init(hdpvr_init);
 438module_exit(hdpvr_exit);
 439
 440MODULE_LICENSE("GPL");
 441MODULE_AUTHOR("Janne Grunau");
 442MODULE_DESCRIPTION("Hauppauge HD PVR driver");
 443