drivers/media/usb/hdpvr/hdpvr-core.c

   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 <linux/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
  31 static int video_nr[HDPVR_MAX] = {[0 ... (HDPVR_MAX - 1)] = UNSET};
  32 module_param_array(video_nr, int, NULL, 0);
  33 MODULE_PARM_DESC(video_nr, "video device number (-1=Auto)");
  34
  35 /* holds the number of currently registered devices */
  36 static atomic_t dev_nr = ATOMIC_INIT(-1);
  37
  38 int hdpvr_debug;
  39 module_param(hdpvr_debug, int, S_IRUGO|S_IWUSR);
  40 MODULE_PARM_DESC(hdpvr_debug, "enable debugging output");
  41
  42 static uint default_video_input = HDPVR_VIDEO_INPUTS;
  43 module_param(default_video_input, uint, S_IRUGO|S_IWUSR);
  44 MODULE_PARM_DESC(default_video_input, "default video input: 0=Component / "
  45                  "1=S-Video / 2=Composite");
  46
  47 static uint default_audio_input = HDPVR_AUDIO_INPUTS;
  48 module_param(default_audio_input, uint, S_IRUGO|S_IWUSR);
  49 MODULE_PARM_DESC(default_audio_input, "default audio input: 0=RCA back / "
  50                  "1=RCA front / 2=S/PDIF");
  51
  52 static bool boost_audio;
  53 module_param(boost_audio, bool, S_IRUGO|S_IWUSR);
  54 MODULE_PARM_DESC(boost_audio, "boost the audio signal");
  55
  56
  57 /* table of devices that work with this driver */
  58 static 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 };
  66 MODULE_DEVICE_TABLE(usb, hdpvr_table);
  67
  68
  69 void hdpvr_delete(struct hdpvr_device *dev)
  70 {
  71         hdpvr_free_buffers(dev);
  72         usb_put_dev(dev->udev);
  73 }
  74
  75 static void challenge(u8 *bytes)
  76 {
  77         __le64 *i64P;
  78         u64 tmp64;
  79         uint i, idx;
  80
  81         for (idx = 0; idx < 32; ++idx) {
  82
  83                 if (idx & 0x3)
  84                         bytes[(idx >> 3) + 3] = bytes[(idx >> 2) & 0x3];
  85
  86                 switch (idx & 0x3) {
  87                 case 0x3:
  88                         bytes[2] += bytes[3] * 4 + bytes[4] + bytes[5];
  89                         bytes[4] += bytes[(idx & 0x1) * 2] * 9 + 9;
  90                         break;
  91                 case 0x1:
  92                         bytes[0] *= 8;
  93                         bytes[0] += 7*idx + 4;
  94                         bytes[6] += bytes[3] * 3;
  95                         break;
  96                 case 0x0:
  97                         bytes[3 - (idx >> 3)] = bytes[idx >> 2];
  98                         bytes[5] += bytes[6] * 3;
  99                         for (i = 0; i < 3; i++)
 100                                 bytes[3] *= bytes[3] + 1;
 101                         break;
 102                 case 0x2:
 103                         for (i = 0; i < 3; i++)
 104                                 bytes[1] *= bytes[6] + 1;
 105                         for (i = 0; i < 3; i++) {
 106                                 i64P = (__le64 *)bytes;
 107                                 tmp64 = le64_to_cpup(i64P);
 108                                 tmp64 = tmp64 + (tmp64 << (bytes[7] & 0x0f));
 109                                 *i64P = cpu_to_le64(tmp64);
 110                         }
 111                         break;
 112                 }
 113         }
 114 }
 115
 116 /* try to init the device like the windows driver */
 117 static int device_authorization(struct hdpvr_device *dev)
 118 {
 119
 120         int ret, retval = -ENOMEM;
 121         char request_type = 0x38, rcv_request = 0x81;
 122         char *response;
 123
 124         mutex_lock(&dev->usbc_mutex);
 125         ret = usb_control_msg(dev->udev,
 126                               usb_rcvctrlpipe(dev->udev, 0),
 127                               rcv_request, 0x80 | request_type,
 128                               0x0400, 0x0003,
 129                               dev->usbc_buf, 46,
 130                               10000);
 131         if (ret != 46) {
 132                 v4l2_err(&dev->v4l2_dev,
 133                          "unexpected answer of status request, len %d\n", ret);
 134                 goto unlock;
 135         }
 136 #ifdef HDPVR_DEBUG
 137         else {
 138                 v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
 139                          "Status request returned, len %d: %46ph\n",
 140                          ret, dev->usbc_buf);
 141         }
 142 #endif
 143
 144         dev->fw_ver = dev->usbc_buf[1];
 145
 146         dev->usbc_buf[46] = '\0';
 147         v4l2_info(&dev->v4l2_dev, "firmware version 0x%x dated %s\n",
 148                           dev->fw_ver, &dev->usbc_buf[2]);
 149
 150         if (dev->fw_ver > 0x15) {
 151                 dev->options.brightness = 0x80;
 152                 dev->options.contrast   = 0x40;
 153                 dev->options.hue        = 0xf;
 154                 dev->options.saturation = 0x40;
 155                 dev->options.sharpness  = 0x80;
 156         }
 157
 158         switch (dev->fw_ver) {
 159         case HDPVR_FIRMWARE_VERSION:
 160                 dev->flags &= ~HDPVR_FLAG_AC3_CAP;
 161                 break;
 162         case HDPVR_FIRMWARE_VERSION_AC3:
 163         case HDPVR_FIRMWARE_VERSION_0X12:
 164         case HDPVR_FIRMWARE_VERSION_0X15:
 165         case HDPVR_FIRMWARE_VERSION_0X1E:
 166                 dev->flags |= HDPVR_FLAG_AC3_CAP;
 167                 break;
 168         default:
 169                 v4l2_info(&dev->v4l2_dev, "untested firmware, the driver might"
 170                           " not work.\n");
 171                 if (dev->fw_ver >= HDPVR_FIRMWARE_VERSION_AC3)
 172                         dev->flags |= HDPVR_FLAG_AC3_CAP;
 173                 else
 174                         dev->flags &= ~HDPVR_FLAG_AC3_CAP;
 175         }
 176
 177         response = dev->usbc_buf+38;
 178 #ifdef HDPVR_DEBUG
 179         v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev, "challenge: %8ph\n",
 180                  response);
 181 #endif
 182         challenge(response);
 183 #ifdef HDPVR_DEBUG
 184         v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev, " response: %8ph\n",
 185                  response);
 186 #endif
 187
 188         msleep(100);
 189         ret = usb_control_msg(dev->udev,
 190                               usb_sndctrlpipe(dev->udev, 0),
 191                               0xd1, 0x00 | request_type,
 192                               0x0000, 0x0000,
 193                               response, 8,
 194                               10000);
 195         v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
 196                  "magic request returned %d\n", ret);
 197
 198         retval = ret != 8;
 199 unlock:
 200         mutex_unlock(&dev->usbc_mutex);
 201         return retval;
 202 }
 203
 204 static int hdpvr_device_init(struct hdpvr_device *dev)
 205 {
 206         int ret;
 207         u8 *buf;
 208
 209         if (device_authorization(dev))
 210                 return -EACCES;
 211
 212         /* default options for init */
 213         hdpvr_set_options(dev);
 214
 215         /* set filter options */
 216         mutex_lock(&dev->usbc_mutex);
 217         buf = dev->usbc_buf;
 218         buf[0] = 0x03; buf[1] = 0x03; buf[2] = 0x00; buf[3] = 0x00;
 219         ret = usb_control_msg(dev->udev,
 220                               usb_sndctrlpipe(dev->udev, 0),
 221                               0x01, 0x38,
 222                               CTRL_LOW_PASS_FILTER_VALUE, CTRL_DEFAULT_INDEX,
 223                               buf, 4,
 224                               1000);
 225         v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
 226                  "control request returned %d\n", ret);
 227         mutex_unlock(&dev->usbc_mutex);
 228
 229         /* enable fan and bling leds */
 230         mutex_lock(&dev->usbc_mutex);
 231         buf[0] = 0x1;
 232         ret = usb_control_msg(dev->udev,
 233                               usb_sndctrlpipe(dev->udev, 0),
 234                               0xd4, 0x38, 0, 0, buf, 1,
 235                               1000);
 236         v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
 237                  "control request returned %d\n", ret);
 238
 239         /* boost analog audio */
 240         buf[0] = boost_audio;
 241         ret = usb_control_msg(dev->udev,
 242                               usb_sndctrlpipe(dev->udev, 0),
 243                               0xd5, 0x38, 0, 0, buf, 1,
 244                               1000);
 245         v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
 246                  "control request returned %d\n", ret);
 247         mutex_unlock(&dev->usbc_mutex);
 248
 249         dev->status = STATUS_IDLE;
 250         return 0;
 251 }
 252
 253 static const struct hdpvr_options hdpvr_default_options = {
 254         .video_std      = HDPVR_60HZ,
 255         .video_input    = HDPVR_COMPONENT,
 256         .audio_input    = HDPVR_RCA_BACK,
 257         .bitrate        = 65, /* 6 mbps */
 258         .peak_bitrate   = 90, /* 9 mbps */
 259         .bitrate_mode   = HDPVR_CONSTANT,
 260         .gop_mode       = HDPVR_SIMPLE_IDR_GOP,
 261         .audio_codec    = V4L2_MPEG_AUDIO_ENCODING_AAC,
 262         /* original picture controls for firmware version <= 0x15 */
 263         /* updated in device_authorization() for newer firmware */
 264         .brightness     = 0x86,
 265         .contrast       = 0x80,
 266         .hue            = 0x80,
 267         .saturation     = 0x80,
 268         .sharpness      = 0x80,
 269 };
 270
 271 static int hdpvr_probe(struct usb_interface *interface,
 272                        const struct usb_device_id *id)
 273 {
 274         struct hdpvr_device *dev;
 275         struct usb_host_interface *iface_desc;
 276         struct usb_endpoint_descriptor *endpoint;
 277 #if IS_ENABLED(CONFIG_I2C)
 278         struct i2c_client *client;
 279 #endif
 280         size_t buffer_size;
 281         int i;
 282         int dev_num;
 283         int retval = -ENOMEM;
 284
 285         /* allocate memory for our device state and initialize it */
 286         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 287         if (!dev) {
 288                 dev_err(&interface->dev, "Out of memory\n");
 289                 goto error;
 290         }
 291
 292         /* init video transfer queues first of all */
 293         /* to prevent oops in hdpvr_delete() on error paths */
 294         INIT_LIST_HEAD(&dev->free_buff_list);
 295         INIT_LIST_HEAD(&dev->rec_buff_list);
 296
 297         /* register v4l2_device early so it can be used for printks */
 298         if (v4l2_device_register(&interface->dev, &dev->v4l2_dev)) {
 299                 dev_err(&interface->dev, "v4l2_device_register failed\n");
 300                 goto error_free_dev;
 301         }
 302
 303         mutex_init(&dev->io_mutex);
 304         mutex_init(&dev->i2c_mutex);
 305         mutex_init(&dev->usbc_mutex);
 306         dev->usbc_buf = kmalloc(64, GFP_KERNEL);
 307         if (!dev->usbc_buf) {
 308                 v4l2_err(&dev->v4l2_dev, "Out of memory\n");
 309                 goto error_v4l2_unregister;
 310         }
 311
 312         init_waitqueue_head(&dev->wait_buffer);
 313         init_waitqueue_head(&dev->wait_data);
 314
 315         dev->workqueue = create_singlethread_workqueue("hdpvr_buffer");
 316         if (!dev->workqueue)
 317                 goto err_free_usbc;
 318
 319         dev->options = hdpvr_default_options;
 320
 321         if (default_video_input < HDPVR_VIDEO_INPUTS)
 322                 dev->options.video_input = default_video_input;
 323
 324         if (default_audio_input < HDPVR_AUDIO_INPUTS) {
 325                 dev->options.audio_input = default_audio_input;
 326                 if (default_audio_input == HDPVR_SPDIF)
 327                         dev->options.audio_codec =
 328                                 V4L2_MPEG_AUDIO_ENCODING_AC3;
 329         }
 330
 331         dev->udev = usb_get_dev(interface_to_usbdev(interface));
 332
 333         /* set up the endpoint information */
 334         /* use only the first bulk-in and bulk-out endpoints */
 335         iface_desc = interface->cur_altsetting;
 336         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
 337                 endpoint = &iface_desc->endpoint[i].desc;
 338
 339                 if (!dev->bulk_in_endpointAddr &&
 340                     usb_endpoint_is_bulk_in(endpoint)) {
 341                         /* USB interface description is buggy, reported max
 342                          * packet size is 512 bytes, windows driver uses 8192 */
 343                         buffer_size = 8192;
 344                         dev->bulk_in_size = buffer_size;
 345                         dev->bulk_in_endpointAddr = endpoint->bEndpointAddress;
 346                 }
 347
 348         }
 349         if (!dev->bulk_in_endpointAddr) {
 350                 v4l2_err(&dev->v4l2_dev, "Could not find bulk-in endpoint\n");
 351                 goto error_put_usb;
 352         }
 353
 354         /* init the device */
 355         if (hdpvr_device_init(dev)) {
 356                 v4l2_err(&dev->v4l2_dev, "device init failed\n");
 357                 goto error_put_usb;
 358         }
 359
 360         mutex_lock(&dev->io_mutex);
 361         if (hdpvr_alloc_buffers(dev, NUM_BUFFERS)) {
 362                 mutex_unlock(&dev->io_mutex);
 363                 v4l2_err(&dev->v4l2_dev,
 364                          "allocating transfer buffers failed\n");
 365                 goto error_put_usb;
 366         }
 367         mutex_unlock(&dev->io_mutex);
 368
 369 #if IS_ENABLED(CONFIG_I2C)
 370         retval = hdpvr_register_i2c_adapter(dev);
 371         if (retval < 0) {
 372                 v4l2_err(&dev->v4l2_dev, "i2c adapter register failed\n");
 373                 goto error_free_buffers;
 374         }
 375
 376         client = hdpvr_register_ir_rx_i2c(dev);
 377         if (!client) {
 378                 v4l2_err(&dev->v4l2_dev, "i2c IR RX device register failed\n");
 379                 retval = -ENODEV;
 380                 goto reg_fail;
 381         }
 382
 383         client = hdpvr_register_ir_tx_i2c(dev);
 384         if (!client) {
 385                 v4l2_err(&dev->v4l2_dev, "i2c IR TX device register failed\n");
 386                 retval = -ENODEV;
 387                 goto reg_fail;
 388         }
 389 #endif
 390
 391         dev_num = atomic_inc_return(&dev_nr);
 392         if (dev_num >= HDPVR_MAX) {
 393                 v4l2_err(&dev->v4l2_dev,
 394                          "max device number reached, device register failed\n");
 395                 atomic_dec(&dev_nr);
 396                 retval = -ENODEV;
 397                 goto reg_fail;
 398         }
 399
 400         retval = hdpvr_register_videodev(dev, &interface->dev,
 401                                     video_nr[dev_num]);
 402         if (retval < 0) {
 403                 v4l2_err(&dev->v4l2_dev, "registering videodev failed\n");
 404                 goto reg_fail;
 405         }
 406
 407         /* let the user know what node this device is now attached to */
 408         v4l2_info(&dev->v4l2_dev, "device now attached to %s\n",
 409                   video_device_node_name(&dev->video_dev));
 410         return 0;
 411
 412 reg_fail:
 413 #if IS_ENABLED(CONFIG_I2C)
 414         i2c_del_adapter(&dev->i2c_adapter);
 415 error_free_buffers:
 416 #endif
 417         hdpvr_free_buffers(dev);
 418 error_put_usb:
 419         usb_put_dev(dev->udev);
 420         /* Destroy single thread */
 421         destroy_workqueue(dev->workqueue);
 422 err_free_usbc:
 423         kfree(dev->usbc_buf);
 424 error_v4l2_unregister:
 425         v4l2_device_unregister(&dev->v4l2_dev);
 426 error_free_dev:
 427         kfree(dev);
 428 error:
 429         return retval;
 430 }
 431
 432 static void hdpvr_disconnect(struct usb_interface *interface)
 433 {
 434         struct hdpvr_device *dev = to_hdpvr_dev(usb_get_intfdata(interface));
 435
 436         v4l2_info(&dev->v4l2_dev, "device %s disconnected\n",
 437                   video_device_node_name(&dev->video_dev));
 438         /* prevent more I/O from starting and stop any ongoing */
 439         mutex_lock(&dev->io_mutex);
 440         dev->status = STATUS_DISCONNECTED;
 441         wake_up_interruptible(&dev->wait_data);
 442         wake_up_interruptible(&dev->wait_buffer);
 443         mutex_unlock(&dev->io_mutex);
 444         v4l2_device_disconnect(&dev->v4l2_dev);
 445         msleep(100);
 446         flush_workqueue(dev->workqueue);
 447         mutex_lock(&dev->io_mutex);
 448         hdpvr_cancel_queue(dev);
 449         mutex_unlock(&dev->io_mutex);
 450 #if IS_ENABLED(CONFIG_I2C)
 451         i2c_del_adapter(&dev->i2c_adapter);
 452 #endif
 453         video_unregister_device(&dev->video_dev);
 454         atomic_dec(&dev_nr);
 455 }
 456
 457
 458 static struct usb_driver hdpvr_usb_driver = {
 459         .name =         "hdpvr",
 460         .probe =        hdpvr_probe,
 461         .disconnect =   hdpvr_disconnect,
 462         .id_table =     hdpvr_table,
 463 };
 464
 465 module_usb_driver(hdpvr_usb_driver);
 466
 467 MODULE_LICENSE("GPL");
 468 MODULE_VERSION("0.2.1");
 469 MODULE_AUTHOR("Janne Grunau");
 470 MODULE_DESCRIPTION("Hauppauge HD PVR driver");