drivers/media/video/saa7134/saa7134-empress.c

   1 /*
   2  *
   3  * (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19
  20 #include <linux/init.h>
  21 #include <linux/list.h>
  22 #include <linux/module.h>
  23 #include <linux/kernel.h>
  24 #include <linux/slab.h>
  25 #include <linux/delay.h>
  26
  27 #include "saa7134-reg.h"
  28 #include "saa7134.h"
  29
  30 #include <media/saa6752hs.h>
  31 #include <media/v4l2-common.h>
  32 #include <media/v4l2-chip-ident.h>
  33
  34 /* ------------------------------------------------------------------ */
  35
  36 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
  37 MODULE_LICENSE("GPL");
  38
  39 static unsigned int empress_nr[] = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET };
  40
  41 module_param_array(empress_nr, int, NULL, 0444);
  42 MODULE_PARM_DESC(empress_nr,"ts device number");
  43
  44 static unsigned int debug;
  45 module_param(debug, int, 0644);
  46 MODULE_PARM_DESC(debug,"enable debug messages");
  47
  48 #define dprintk(fmt, arg...)    if (debug)                      \
  49         printk(KERN_DEBUG "%s/empress: " fmt, dev->name , ## arg)
  50
  51 /* ------------------------------------------------------------------ */
  52
  53 static void ts_reset_encoder(struct saa7134_dev* dev)
  54 {
  55         if (!dev->empress_started)
  56                 return;
  57
  58         saa_writeb(SAA7134_SPECIAL_MODE, 0x00);
  59         msleep(10);
  60         saa_writeb(SAA7134_SPECIAL_MODE, 0x01);
  61         msleep(100);
  62         dev->empress_started = 0;
  63 }
  64
  65 static int ts_init_encoder(struct saa7134_dev* dev)
  66 {
  67         u32 leading_null_bytes = 0;
  68
  69         /* If more cards start to need this, then this
  70            should probably be added to the card definitions. */
  71         switch (dev->board) {
  72         case SAA7134_BOARD_BEHOLD_M6:
  73         case SAA7134_BOARD_BEHOLD_M63:
  74         case SAA7134_BOARD_BEHOLD_M6_EXTRA:
  75                 leading_null_bytes = 1;
  76                 break;
  77         }
  78         ts_reset_encoder(dev);
  79         saa7134_i2c_call_clients(dev, VIDIOC_INT_INIT, &leading_null_bytes);
  80         dev->empress_started = 1;
  81         return 0;
  82 }
  83
  84 /* ------------------------------------------------------------------ */
  85
  86 static int ts_open(struct file *file)
  87 {
  88         int minor = video_devdata(file)->minor;
  89         struct saa7134_dev *dev;
  90         int err;
  91
  92         lock_kernel();
  93         list_for_each_entry(dev, &saa7134_devlist, devlist)
  94                 if (dev->empress_dev && dev->empress_dev->minor == minor)
  95                         goto found;
  96         unlock_kernel();
  97         return -ENODEV;
  98  found:
  99
 100         dprintk("open minor=%d\n",minor);
 101         err = -EBUSY;
 102         if (!mutex_trylock(&dev->empress_tsq.vb_lock))
 103                 goto done;
 104         if (atomic_read(&dev->empress_users))
 105                 goto done_up;
 106
 107         /* Unmute audio */
 108         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
 109                 saa_readb(SAA7134_AUDIO_MUTE_CTRL) & ~(1 << 6));
 110
 111         atomic_inc(&dev->empress_users);
 112         file->private_data = dev;
 113         err = 0;
 114
 115 done_up:
 116         mutex_unlock(&dev->empress_tsq.vb_lock);
 117 done:
 118         unlock_kernel();
 119         return err;
 120 }
 121
 122 static int ts_release(struct file *file)
 123 {
 124         struct saa7134_dev *dev = file->private_data;
 125
 126         videobuf_stop(&dev->empress_tsq);
 127         videobuf_mmap_free(&dev->empress_tsq);
 128
 129         /* stop the encoder */
 130         ts_reset_encoder(dev);
 131
 132         /* Mute audio */
 133         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
 134                 saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6));
 135
 136         atomic_dec(&dev->empress_users);
 137
 138         return 0;
 139 }
 140
 141 static ssize_t
 142 ts_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
 143 {
 144         struct saa7134_dev *dev = file->private_data;
 145
 146         if (!dev->empress_started)
 147                 ts_init_encoder(dev);
 148
 149         return videobuf_read_stream(&dev->empress_tsq,
 150                                     data, count, ppos, 0,
 151                                     file->f_flags & O_NONBLOCK);
 152 }
 153
 154 static unsigned int
 155 ts_poll(struct file *file, struct poll_table_struct *wait)
 156 {
 157         struct saa7134_dev *dev = file->private_data;
 158
 159         return videobuf_poll_stream(file, &dev->empress_tsq, wait);
 160 }
 161
 162
 163 static int
 164 ts_mmap(struct file *file, struct vm_area_struct * vma)
 165 {
 166         struct saa7134_dev *dev = file->private_data;
 167
 168         return videobuf_mmap_mapper(&dev->empress_tsq, vma);
 169 }
 170
 171 /*
 172  * This function is _not_ called directly, but from
 173  * video_generic_ioctl (and maybe others).  userspace
 174  * copying is done already, arg is a kernel pointer.
 175  */
 176
 177 static int empress_querycap(struct file *file, void  *priv,
 178                                         struct v4l2_capability *cap)
 179 {
 180         struct saa7134_dev *dev = file->private_data;
 181
 182         strcpy(cap->driver, "saa7134");
 183         strlcpy(cap->card, saa7134_boards[dev->board].name,
 184                 sizeof(cap->card));
 185         sprintf(cap->bus_info, "PCI:%s", pci_name(dev->pci));
 186         cap->version = SAA7134_VERSION_CODE;
 187         cap->capabilities =
 188                 V4L2_CAP_VIDEO_CAPTURE |
 189                 V4L2_CAP_READWRITE |
 190                 V4L2_CAP_STREAMING;
 191         return 0;
 192 }
 193
 194 static int empress_enum_input(struct file *file, void *priv,
 195                                         struct v4l2_input *i)
 196 {
 197         if (i->index != 0)
 198                 return -EINVAL;
 199
 200         i->type = V4L2_INPUT_TYPE_CAMERA;
 201         strcpy(i->name, "CCIR656");
 202
 203         return 0;
 204 }
 205
 206 static int empress_g_input(struct file *file, void *priv, unsigned int *i)
 207 {
 208         *i = 0;
 209         return 0;
 210 }
 211
 212 static int empress_s_input(struct file *file, void *priv, unsigned int i)
 213 {
 214         if (i != 0)
 215                 return -EINVAL;
 216
 217         return 0;
 218 }
 219
 220 static int empress_enum_fmt_vid_cap(struct file *file, void  *priv,
 221                                         struct v4l2_fmtdesc *f)
 222 {
 223         if (f->index != 0)
 224                 return -EINVAL;
 225
 226         strlcpy(f->description, "MPEG TS", sizeof(f->description));
 227         f->pixelformat = V4L2_PIX_FMT_MPEG;
 228
 229         return 0;
 230 }
 231
 232 static int empress_g_fmt_vid_cap(struct file *file, void *priv,
 233                                 struct v4l2_format *f)
 234 {
 235         struct saa7134_dev *dev = file->private_data;
 236
 237         saa7134_i2c_call_clients(dev, VIDIOC_G_FMT, f);
 238
 239         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 240         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 241
 242         return 0;
 243 }
 244
 245 static int empress_s_fmt_vid_cap(struct file *file, void *priv,
 246                                 struct v4l2_format *f)
 247 {
 248         struct saa7134_dev *dev = file->private_data;
 249
 250         saa7134_i2c_call_clients(dev, VIDIOC_S_FMT, f);
 251
 252         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 253         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 254
 255         return 0;
 256 }
 257
 258
 259 static int empress_reqbufs(struct file *file, void *priv,
 260                                         struct v4l2_requestbuffers *p)
 261 {
 262         struct saa7134_dev *dev = file->private_data;
 263
 264         return videobuf_reqbufs(&dev->empress_tsq, p);
 265 }
 266
 267 static int empress_querybuf(struct file *file, void *priv,
 268                                         struct v4l2_buffer *b)
 269 {
 270         struct saa7134_dev *dev = file->private_data;
 271
 272         return videobuf_querybuf(&dev->empress_tsq, b);
 273 }
 274
 275 static int empress_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
 276 {
 277         struct saa7134_dev *dev = file->private_data;
 278
 279         return videobuf_qbuf(&dev->empress_tsq, b);
 280 }
 281
 282 static int empress_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
 283 {
 284         struct saa7134_dev *dev = file->private_data;
 285
 286         return videobuf_dqbuf(&dev->empress_tsq, b,
 287                                 file->f_flags & O_NONBLOCK);
 288 }
 289
 290 static int empress_streamon(struct file *file, void *priv,
 291                                         enum v4l2_buf_type type)
 292 {
 293         struct saa7134_dev *dev = file->private_data;
 294
 295         return videobuf_streamon(&dev->empress_tsq);
 296 }
 297
 298 static int empress_streamoff(struct file *file, void *priv,
 299                                         enum v4l2_buf_type type)
 300 {
 301         struct saa7134_dev *dev = file->private_data;
 302
 303         return videobuf_streamoff(&dev->empress_tsq);
 304 }
 305
 306 static int empress_s_ext_ctrls(struct file *file, void *priv,
 307                                struct v4l2_ext_controls *ctrls)
 308 {
 309         struct saa7134_dev *dev = file->private_data;
 310         int err;
 311
 312         /* count == 0 is abused in saa6752hs.c, so that special
 313                 case is handled here explicitly. */
 314         if (ctrls->count == 0)
 315                 return 0;
 316
 317         if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 318                 return -EINVAL;
 319
 320         err = saa7134_i2c_call_saa6752(dev, VIDIOC_S_EXT_CTRLS, ctrls);
 321         ts_init_encoder(dev);
 322
 323         return err;
 324 }
 325
 326 static int empress_g_ext_ctrls(struct file *file, void *priv,
 327                                struct v4l2_ext_controls *ctrls)
 328 {
 329         struct saa7134_dev *dev = file->private_data;
 330
 331         if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 332                 return -EINVAL;
 333         return saa7134_i2c_call_saa6752(dev, VIDIOC_G_EXT_CTRLS, ctrls);
 334 }
 335
 336 static int empress_g_ctrl(struct file *file, void *priv,
 337                                         struct v4l2_control *c)
 338 {
 339         struct saa7134_dev *dev = file->private_data;
 340
 341         return saa7134_g_ctrl_internal(dev, NULL, c);
 342 }
 343
 344 static int empress_s_ctrl(struct file *file, void *priv,
 345                                         struct v4l2_control *c)
 346 {
 347         struct saa7134_dev *dev = file->private_data;
 348
 349         return saa7134_s_ctrl_internal(dev, NULL, c);
 350 }
 351
 352 static int empress_queryctrl(struct file *file, void *priv,
 353                                         struct v4l2_queryctrl *c)
 354 {
 355         static const u32 user_ctrls[] = {
 356                 V4L2_CID_USER_CLASS,
 357                 V4L2_CID_BRIGHTNESS,
 358                 V4L2_CID_CONTRAST,
 359                 V4L2_CID_SATURATION,
 360                 V4L2_CID_HUE,
 361                 V4L2_CID_AUDIO_VOLUME,
 362                 V4L2_CID_AUDIO_MUTE,
 363                 V4L2_CID_HFLIP,
 364                 0
 365         };
 366
 367         static const u32 mpeg_ctrls[] = {
 368                 V4L2_CID_MPEG_CLASS,
 369                 V4L2_CID_MPEG_STREAM_TYPE,
 370                 V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ,
 371                 V4L2_CID_MPEG_AUDIO_ENCODING,
 372                 V4L2_CID_MPEG_AUDIO_L2_BITRATE,
 373                 V4L2_CID_MPEG_VIDEO_ENCODING,
 374                 V4L2_CID_MPEG_VIDEO_ASPECT,
 375                 V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
 376                 V4L2_CID_MPEG_VIDEO_BITRATE,
 377                 V4L2_CID_MPEG_VIDEO_BITRATE_PEAK,
 378                 0
 379         };
 380         static const u32 *ctrl_classes[] = {
 381                 user_ctrls,
 382                 mpeg_ctrls,
 383                 NULL
 384         };
 385         struct saa7134_dev *dev = file->private_data;
 386
 387         c->id = v4l2_ctrl_next(ctrl_classes, c->id);
 388         if (c->id == 0)
 389                 return -EINVAL;
 390         if (c->id == V4L2_CID_USER_CLASS || c->id == V4L2_CID_MPEG_CLASS)
 391                 return v4l2_ctrl_query_fill_std(c);
 392         if (V4L2_CTRL_ID2CLASS(c->id) != V4L2_CTRL_CLASS_MPEG)
 393                 return saa7134_queryctrl(file, priv, c);
 394         return saa7134_i2c_call_saa6752(dev, VIDIOC_QUERYCTRL, c);
 395 }
 396
 397 static int empress_querymenu(struct file *file, void *priv,
 398                                         struct v4l2_querymenu *c)
 399 {
 400         struct saa7134_dev *dev = file->private_data;
 401
 402         if (V4L2_CTRL_ID2CLASS(c->id) != V4L2_CTRL_CLASS_MPEG)
 403                 return -EINVAL;
 404         return saa7134_i2c_call_saa6752(dev, VIDIOC_QUERYMENU, c);
 405 }
 406
 407 static int empress_g_chip_ident(struct file *file, void *fh,
 408                struct v4l2_chip_ident *chip)
 409 {
 410         struct saa7134_dev *dev = file->private_data;
 411
 412         chip->ident = V4L2_IDENT_NONE;
 413         chip->revision = 0;
 414         if (dev->mpeg_i2c_client == NULL)
 415                 return -EINVAL;
 416         if (chip->match_type == V4L2_CHIP_MATCH_I2C_DRIVER &&
 417             chip->match_chip == I2C_DRIVERID_SAA6752HS)
 418                 return saa7134_i2c_call_saa6752(dev, VIDIOC_G_CHIP_IDENT, chip);
 419         if (chip->match_type == V4L2_CHIP_MATCH_I2C_ADDR &&
 420             chip->match_chip == dev->mpeg_i2c_client->addr)
 421                 return saa7134_i2c_call_saa6752(dev, VIDIOC_G_CHIP_IDENT, chip);
 422         return -EINVAL;
 423 }
 424
 425 static int empress_s_std(struct file *file, void *priv, v4l2_std_id *id)
 426 {
 427         struct saa7134_dev *dev = file->private_data;
 428
 429         return saa7134_s_std_internal(dev, NULL, id);
 430 }
 431
 432 static int empress_g_std(struct file *file, void *priv, v4l2_std_id *id)
 433 {
 434         struct saa7134_dev *dev = file->private_data;
 435
 436         *id = dev->tvnorm->id;
 437         return 0;
 438 }
 439
 440 static const struct v4l2_file_operations ts_fops =
 441 {
 442         .owner    = THIS_MODULE,
 443         .open     = ts_open,
 444         .release  = ts_release,
 445         .read     = ts_read,
 446         .poll     = ts_poll,
 447         .mmap     = ts_mmap,
 448         .ioctl    = video_ioctl2,
 449 };
 450
 451 static const struct v4l2_ioctl_ops ts_ioctl_ops = {
 452         .vidioc_querycap                = empress_querycap,
 453         .vidioc_enum_fmt_vid_cap        = empress_enum_fmt_vid_cap,
 454         .vidioc_s_fmt_vid_cap           = empress_s_fmt_vid_cap,
 455         .vidioc_g_fmt_vid_cap           = empress_g_fmt_vid_cap,
 456         .vidioc_reqbufs                 = empress_reqbufs,
 457         .vidioc_querybuf                = empress_querybuf,
 458         .vidioc_qbuf                    = empress_qbuf,
 459         .vidioc_dqbuf                   = empress_dqbuf,
 460         .vidioc_streamon                = empress_streamon,
 461         .vidioc_streamoff               = empress_streamoff,
 462         .vidioc_s_ext_ctrls             = empress_s_ext_ctrls,
 463         .vidioc_g_ext_ctrls             = empress_g_ext_ctrls,
 464         .vidioc_enum_input              = empress_enum_input,
 465         .vidioc_g_input                 = empress_g_input,
 466         .vidioc_s_input                 = empress_s_input,
 467         .vidioc_queryctrl               = empress_queryctrl,
 468         .vidioc_querymenu               = empress_querymenu,
 469         .vidioc_g_ctrl                  = empress_g_ctrl,
 470         .vidioc_s_ctrl                  = empress_s_ctrl,
 471         .vidioc_g_chip_ident            = empress_g_chip_ident,
 472         .vidioc_s_std                   = empress_s_std,
 473         .vidioc_g_std                   = empress_g_std,
 474 };
 475
 476 /* ----------------------------------------------------------- */
 477
 478 static struct video_device saa7134_empress_template = {
 479         .name          = "saa7134-empress",
 480         .fops          = &ts_fops,
 481         .minor         = -1,
 482         .ioctl_ops     = &ts_ioctl_ops,
 483
 484         .tvnorms                        = SAA7134_NORMS,
 485         .current_norm                   = V4L2_STD_PAL,
 486 };
 487
 488 static void empress_signal_update(struct work_struct *work)
 489 {
 490         struct saa7134_dev* dev =
 491                 container_of(work, struct saa7134_dev, empress_workqueue);
 492
 493         if (dev->nosignal) {
 494                 dprintk("no video signal\n");
 495                 ts_reset_encoder(dev);
 496         } else {
 497                 dprintk("video signal acquired\n");
 498                 if (atomic_read(&dev->empress_users))
 499                         ts_init_encoder(dev);
 500         }
 501 }
 502
 503 static void empress_signal_change(struct saa7134_dev *dev)
 504 {
 505         schedule_work(&dev->empress_workqueue);
 506 }
 507
 508
 509 static int empress_init(struct saa7134_dev *dev)
 510 {
 511         int err;
 512
 513         dprintk("%s: %s\n",dev->name,__func__);
 514         dev->empress_dev = video_device_alloc();
 515         if (NULL == dev->empress_dev)
 516                 return -ENOMEM;
 517         *(dev->empress_dev) = saa7134_empress_template;
 518         dev->empress_dev->parent  = &dev->pci->dev;
 519         dev->empress_dev->release = video_device_release;
 520         snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
 521                  "%s empress (%s)", dev->name,
 522                  saa7134_boards[dev->board].name);
 523
 524         INIT_WORK(&dev->empress_workqueue, empress_signal_update);
 525
 526         err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
 527                                     empress_nr[dev->nr]);
 528         if (err < 0) {
 529                 printk(KERN_INFO "%s: can't register video device\n",
 530                        dev->name);
 531                 video_device_release(dev->empress_dev);
 532                 dev->empress_dev = NULL;
 533                 return err;
 534         }
 535         printk(KERN_INFO "%s: registered device video%d [mpeg]\n",
 536                dev->name, dev->empress_dev->num);
 537
 538         videobuf_queue_sg_init(&dev->empress_tsq, &saa7134_ts_qops,
 539                             &dev->pci->dev, &dev->slock,
 540                             V4L2_BUF_TYPE_VIDEO_CAPTURE,
 541                             V4L2_FIELD_ALTERNATE,
 542                             sizeof(struct saa7134_buf),
 543                             dev);
 544
 545         empress_signal_update(&dev->empress_workqueue);
 546         return 0;
 547 }
 548
 549 static int empress_fini(struct saa7134_dev *dev)
 550 {
 551         dprintk("%s: %s\n",dev->name,__func__);
 552
 553         if (NULL == dev->empress_dev)
 554                 return 0;
 555         flush_scheduled_work();
 556         video_unregister_device(dev->empress_dev);
 557         dev->empress_dev = NULL;
 558         return 0;
 559 }
 560
 561 static struct saa7134_mpeg_ops empress_ops = {
 562         .type          = SAA7134_MPEG_EMPRESS,
 563         .init          = empress_init,
 564         .fini          = empress_fini,
 565         .signal_change = empress_signal_change,
 566 };
 567
 568 static int __init empress_register(void)
 569 {
 570         return saa7134_ts_register(&empress_ops);
 571 }
 572
 573 static void __exit empress_unregister(void)
 574 {
 575         saa7134_ts_unregister(&empress_ops);
 576 }
 577
 578 module_init(empress_register);
 579 module_exit(empress_unregister);
 580
 581 /* ----------------------------------------------------------- */
 582 /*
 583  * Local variables:
 584  * c-basic-offset: 8
 585  * End:
 586  */