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/delay.h>
  25
  26 #include "saa7134-reg.h"
  27 #include "saa7134.h"
  28
  29 #include <media/saa6752hs.h>
  30 #include <media/v4l2-common.h>
  31 #include <media/v4l2-chip-ident.h>
  32
  33 /* ------------------------------------------------------------------ */
  34
  35 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
  36 MODULE_LICENSE("GPL");
  37
  38 static unsigned int empress_nr[] = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET };
  39
  40 module_param_array(empress_nr, int, NULL, 0444);
  41 MODULE_PARM_DESC(empress_nr,"ts device number");
  42
  43 static unsigned int debug;
  44 module_param(debug, int, 0644);
  45 MODULE_PARM_DESC(debug,"enable debug messages");
  46
  47 #define dprintk(fmt, arg...)    if (debug)                      \
  48         printk(KERN_DEBUG "%s/empress: " fmt, dev->name , ## arg)
  49
  50 /* ------------------------------------------------------------------ */
  51
  52 static void ts_reset_encoder(struct saa7134_dev* dev)
  53 {
  54         if (!dev->empress_started)
  55                 return;
  56
  57         saa_writeb(SAA7134_SPECIAL_MODE, 0x00);
  58         msleep(10);
  59         saa_writeb(SAA7134_SPECIAL_MODE, 0x01);
  60         msleep(100);
  61         dev->empress_started = 0;
  62 }
  63
  64 static int ts_init_encoder(struct saa7134_dev* dev)
  65 {
  66         u32 leading_null_bytes = 0;
  67
  68         /* If more cards start to need this, then this
  69            should probably be added to the card definitions. */
  70         switch (dev->board) {
  71         case SAA7134_BOARD_BEHOLD_M6:
  72         case SAA7134_BOARD_BEHOLD_M63:
  73         case SAA7134_BOARD_BEHOLD_M6_EXTRA:
  74                 leading_null_bytes = 1;
  75                 break;
  76         }
  77         ts_reset_encoder(dev);
  78         saa_call_all(dev, core, init, leading_null_bytes);
  79         dev->empress_started = 1;
  80         return 0;
  81 }
  82
  83 /* ------------------------------------------------------------------ */
  84
  85 static int ts_open(struct file *file)
  86 {
  87         struct video_device *vdev = video_devdata(file);
  88         struct saa7134_dev *dev = video_drvdata(file);
  89         int err;
  90
  91         dprintk("open dev=%s\n", video_device_node_name(vdev));
  92         err = -EBUSY;
  93         if (!mutex_trylock(&dev->empress_tsq.vb_lock))
  94                 return err;
  95         if (atomic_read(&dev->empress_users))
  96                 goto done;
  97
  98         /* Unmute audio */
  99         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
 100                 saa_readb(SAA7134_AUDIO_MUTE_CTRL) & ~(1 << 6));
 101
 102         atomic_inc(&dev->empress_users);
 103         file->private_data = dev;
 104         err = 0;
 105
 106 done:
 107         mutex_unlock(&dev->empress_tsq.vb_lock);
 108         return err;
 109 }
 110
 111 static int ts_release(struct file *file)
 112 {
 113         struct saa7134_dev *dev = file->private_data;
 114
 115         videobuf_stop(&dev->empress_tsq);
 116         videobuf_mmap_free(&dev->empress_tsq);
 117
 118         /* stop the encoder */
 119         ts_reset_encoder(dev);
 120
 121         /* Mute audio */
 122         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
 123                 saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6));
 124
 125         atomic_dec(&dev->empress_users);
 126
 127         return 0;
 128 }
 129
 130 static ssize_t
 131 ts_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
 132 {
 133         struct saa7134_dev *dev = file->private_data;
 134
 135         if (!dev->empress_started)
 136                 ts_init_encoder(dev);
 137
 138         return videobuf_read_stream(&dev->empress_tsq,
 139                                     data, count, ppos, 0,
 140                                     file->f_flags & O_NONBLOCK);
 141 }
 142
 143 static unsigned int
 144 ts_poll(struct file *file, struct poll_table_struct *wait)
 145 {
 146         struct saa7134_dev *dev = file->private_data;
 147
 148         return videobuf_poll_stream(file, &dev->empress_tsq, wait);
 149 }
 150
 151
 152 static int
 153 ts_mmap(struct file *file, struct vm_area_struct * vma)
 154 {
 155         struct saa7134_dev *dev = file->private_data;
 156
 157         return videobuf_mmap_mapper(&dev->empress_tsq, vma);
 158 }
 159
 160 /*
 161  * This function is _not_ called directly, but from
 162  * video_generic_ioctl (and maybe others).  userspace
 163  * copying is done already, arg is a kernel pointer.
 164  */
 165
 166 static int empress_querycap(struct file *file, void  *priv,
 167                                         struct v4l2_capability *cap)
 168 {
 169         struct saa7134_dev *dev = file->private_data;
 170
 171         strcpy(cap->driver, "saa7134");
 172         strlcpy(cap->card, saa7134_boards[dev->board].name,
 173                 sizeof(cap->card));
 174         sprintf(cap->bus_info, "PCI:%s", pci_name(dev->pci));
 175         cap->capabilities =
 176                 V4L2_CAP_VIDEO_CAPTURE |
 177                 V4L2_CAP_READWRITE |
 178                 V4L2_CAP_STREAMING;
 179         return 0;
 180 }
 181
 182 static int empress_enum_input(struct file *file, void *priv,
 183                                         struct v4l2_input *i)
 184 {
 185         if (i->index != 0)
 186                 return -EINVAL;
 187
 188         i->type = V4L2_INPUT_TYPE_CAMERA;
 189         strcpy(i->name, "CCIR656");
 190
 191         return 0;
 192 }
 193
 194 static int empress_g_input(struct file *file, void *priv, unsigned int *i)
 195 {
 196         *i = 0;
 197         return 0;
 198 }
 199
 200 static int empress_s_input(struct file *file, void *priv, unsigned int i)
 201 {
 202         if (i != 0)
 203                 return -EINVAL;
 204
 205         return 0;
 206 }
 207
 208 static int empress_enum_fmt_vid_cap(struct file *file, void  *priv,
 209                                         struct v4l2_fmtdesc *f)
 210 {
 211         if (f->index != 0)
 212                 return -EINVAL;
 213
 214         strlcpy(f->description, "MPEG TS", sizeof(f->description));
 215         f->pixelformat = V4L2_PIX_FMT_MPEG;
 216
 217         return 0;
 218 }
 219
 220 static int empress_g_fmt_vid_cap(struct file *file, void *priv,
 221                                 struct v4l2_format *f)
 222 {
 223         struct saa7134_dev *dev = file->private_data;
 224         struct v4l2_mbus_framefmt mbus_fmt;
 225
 226         saa_call_all(dev, video, g_mbus_fmt, &mbus_fmt);
 227
 228         v4l2_fill_pix_format(&f->fmt.pix, &mbus_fmt);
 229         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 230         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 231
 232         return 0;
 233 }
 234
 235 static int empress_s_fmt_vid_cap(struct file *file, void *priv,
 236                                 struct v4l2_format *f)
 237 {
 238         struct saa7134_dev *dev = file->private_data;
 239         struct v4l2_mbus_framefmt mbus_fmt;
 240
 241         v4l2_fill_mbus_format(&mbus_fmt, &f->fmt.pix, V4L2_MBUS_FMT_FIXED);
 242         saa_call_all(dev, video, s_mbus_fmt, &mbus_fmt);
 243         v4l2_fill_pix_format(&f->fmt.pix, &mbus_fmt);
 244
 245         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 246         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 247
 248         return 0;
 249 }
 250
 251 static int empress_try_fmt_vid_cap(struct file *file, void *priv,
 252                                 struct v4l2_format *f)
 253 {
 254         struct saa7134_dev *dev = file->private_data;
 255
 256         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 257         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 258
 259         return 0;
 260 }
 261
 262 static int empress_reqbufs(struct file *file, void *priv,
 263                                         struct v4l2_requestbuffers *p)
 264 {
 265         struct saa7134_dev *dev = file->private_data;
 266
 267         return videobuf_reqbufs(&dev->empress_tsq, p);
 268 }
 269
 270 static int empress_querybuf(struct file *file, void *priv,
 271                                         struct v4l2_buffer *b)
 272 {
 273         struct saa7134_dev *dev = file->private_data;
 274
 275         return videobuf_querybuf(&dev->empress_tsq, b);
 276 }
 277
 278 static int empress_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
 279 {
 280         struct saa7134_dev *dev = file->private_data;
 281
 282         return videobuf_qbuf(&dev->empress_tsq, b);
 283 }
 284
 285 static int empress_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
 286 {
 287         struct saa7134_dev *dev = file->private_data;
 288
 289         return videobuf_dqbuf(&dev->empress_tsq, b,
 290                                 file->f_flags & O_NONBLOCK);
 291 }
 292
 293 static int empress_streamon(struct file *file, void *priv,
 294                                         enum v4l2_buf_type type)
 295 {
 296         struct saa7134_dev *dev = file->private_data;
 297
 298         return videobuf_streamon(&dev->empress_tsq);
 299 }
 300
 301 static int empress_streamoff(struct file *file, void *priv,
 302                                         enum v4l2_buf_type type)
 303 {
 304         struct saa7134_dev *dev = file->private_data;
 305
 306         return videobuf_streamoff(&dev->empress_tsq);
 307 }
 308
 309 static int empress_s_ext_ctrls(struct file *file, void *priv,
 310                                struct v4l2_ext_controls *ctrls)
 311 {
 312         struct saa7134_dev *dev = file->private_data;
 313         int err;
 314
 315         /* count == 0 is abused in saa6752hs.c, so that special
 316                 case is handled here explicitly. */
 317         if (ctrls->count == 0)
 318                 return 0;
 319
 320         if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 321                 return -EINVAL;
 322
 323         err = saa_call_empress(dev, core, s_ext_ctrls, ctrls);
 324         ts_init_encoder(dev);
 325
 326         return err;
 327 }
 328
 329 static int empress_g_ext_ctrls(struct file *file, void *priv,
 330                                struct v4l2_ext_controls *ctrls)
 331 {
 332         struct saa7134_dev *dev = file->private_data;
 333
 334         if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 335                 return -EINVAL;
 336         return saa_call_empress(dev, core, g_ext_ctrls, ctrls);
 337 }
 338
 339 static int empress_g_ctrl(struct file *file, void *priv,
 340                                         struct v4l2_control *c)
 341 {
 342         struct saa7134_dev *dev = file->private_data;
 343
 344         return saa7134_g_ctrl_internal(dev, NULL, c);
 345 }
 346
 347 static int empress_s_ctrl(struct file *file, void *priv,
 348                                         struct v4l2_control *c)
 349 {
 350         struct saa7134_dev *dev = file->private_data;
 351
 352         return saa7134_s_ctrl_internal(dev, NULL, c);
 353 }
 354
 355 static int empress_queryctrl(struct file *file, void *priv,
 356                                         struct v4l2_queryctrl *c)
 357 {
 358         /* Must be sorted from low to high control ID! */
 359         static const u32 user_ctrls[] = {
 360                 V4L2_CID_USER_CLASS,
 361                 V4L2_CID_BRIGHTNESS,
 362                 V4L2_CID_CONTRAST,
 363                 V4L2_CID_SATURATION,
 364                 V4L2_CID_HUE,
 365                 V4L2_CID_AUDIO_VOLUME,
 366                 V4L2_CID_AUDIO_MUTE,
 367                 V4L2_CID_HFLIP,
 368                 0
 369         };
 370
 371         /* Must be sorted from low to high control ID! */
 372         static const u32 mpeg_ctrls[] = {
 373                 V4L2_CID_MPEG_CLASS,
 374                 V4L2_CID_MPEG_STREAM_TYPE,
 375                 V4L2_CID_MPEG_STREAM_PID_PMT,
 376                 V4L2_CID_MPEG_STREAM_PID_AUDIO,
 377                 V4L2_CID_MPEG_STREAM_PID_VIDEO,
 378                 V4L2_CID_MPEG_STREAM_PID_PCR,
 379                 V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ,
 380                 V4L2_CID_MPEG_AUDIO_ENCODING,
 381                 V4L2_CID_MPEG_AUDIO_L2_BITRATE,
 382                 V4L2_CID_MPEG_VIDEO_ENCODING,
 383                 V4L2_CID_MPEG_VIDEO_ASPECT,
 384                 V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
 385                 V4L2_CID_MPEG_VIDEO_BITRATE,
 386                 V4L2_CID_MPEG_VIDEO_BITRATE_PEAK,
 387                 0
 388         };
 389         static const u32 *ctrl_classes[] = {
 390                 user_ctrls,
 391                 mpeg_ctrls,
 392                 NULL
 393         };
 394         struct saa7134_dev *dev = file->private_data;
 395
 396         c->id = v4l2_ctrl_next(ctrl_classes, c->id);
 397         if (c->id == 0)
 398                 return -EINVAL;
 399         if (c->id == V4L2_CID_USER_CLASS || c->id == V4L2_CID_MPEG_CLASS)
 400                 return v4l2_ctrl_query_fill(c, 0, 0, 0, 0);
 401         if (V4L2_CTRL_ID2CLASS(c->id) != V4L2_CTRL_CLASS_MPEG)
 402                 return saa7134_queryctrl(file, priv, c);
 403         return saa_call_empress(dev, core, queryctrl, c);
 404 }
 405
 406 static int empress_querymenu(struct file *file, void *priv,
 407                                         struct v4l2_querymenu *c)
 408 {
 409         struct saa7134_dev *dev = file->private_data;
 410
 411         if (V4L2_CTRL_ID2CLASS(c->id) != V4L2_CTRL_CLASS_MPEG)
 412                 return -EINVAL;
 413         return saa_call_empress(dev, core, querymenu, c);
 414 }
 415
 416 static int empress_g_chip_ident(struct file *file, void *fh,
 417                struct v4l2_dbg_chip_ident *chip)
 418 {
 419         struct saa7134_dev *dev = file->private_data;
 420
 421         chip->ident = V4L2_IDENT_NONE;
 422         chip->revision = 0;
 423         if (chip->match.type == V4L2_CHIP_MATCH_I2C_DRIVER &&
 424             !strcmp(chip->match.name, "saa6752hs"))
 425                 return saa_call_empress(dev, core, g_chip_ident, chip);
 426         if (chip->match.type == V4L2_CHIP_MATCH_I2C_ADDR)
 427                 return saa_call_empress(dev, core, g_chip_ident, chip);
 428         return -EINVAL;
 429 }
 430
 431 static int empress_s_std(struct file *file, void *priv, v4l2_std_id *id)
 432 {
 433         struct saa7134_dev *dev = file->private_data;
 434
 435         return saa7134_s_std_internal(dev, NULL, id);
 436 }
 437
 438 static int empress_g_std(struct file *file, void *priv, v4l2_std_id *id)
 439 {
 440         struct saa7134_dev *dev = file->private_data;
 441
 442         *id = dev->tvnorm->id;
 443         return 0;
 444 }
 445
 446 static const struct v4l2_file_operations ts_fops =
 447 {
 448         .owner    = THIS_MODULE,
 449         .open     = ts_open,
 450         .release  = ts_release,
 451         .read     = ts_read,
 452         .poll     = ts_poll,
 453         .mmap     = ts_mmap,
 454         .ioctl    = video_ioctl2,
 455 };
 456
 457 static const struct v4l2_ioctl_ops ts_ioctl_ops = {
 458         .vidioc_querycap                = empress_querycap,
 459         .vidioc_enum_fmt_vid_cap        = empress_enum_fmt_vid_cap,
 460         .vidioc_try_fmt_vid_cap         = empress_try_fmt_vid_cap,
 461         .vidioc_s_fmt_vid_cap           = empress_s_fmt_vid_cap,
 462         .vidioc_g_fmt_vid_cap           = empress_g_fmt_vid_cap,
 463         .vidioc_reqbufs                 = empress_reqbufs,
 464         .vidioc_querybuf                = empress_querybuf,
 465         .vidioc_qbuf                    = empress_qbuf,
 466         .vidioc_dqbuf                   = empress_dqbuf,
 467         .vidioc_streamon                = empress_streamon,
 468         .vidioc_streamoff               = empress_streamoff,
 469         .vidioc_s_ext_ctrls             = empress_s_ext_ctrls,
 470         .vidioc_g_ext_ctrls             = empress_g_ext_ctrls,
 471         .vidioc_enum_input              = empress_enum_input,
 472         .vidioc_g_input                 = empress_g_input,
 473         .vidioc_s_input                 = empress_s_input,
 474         .vidioc_queryctrl               = empress_queryctrl,
 475         .vidioc_querymenu               = empress_querymenu,
 476         .vidioc_g_ctrl                  = empress_g_ctrl,
 477         .vidioc_s_ctrl                  = empress_s_ctrl,
 478         .vidioc_g_chip_ident            = empress_g_chip_ident,
 479         .vidioc_s_std                   = empress_s_std,
 480         .vidioc_g_std                   = empress_g_std,
 481 };
 482
 483 /* ----------------------------------------------------------- */
 484
 485 static struct video_device saa7134_empress_template = {
 486         .name          = "saa7134-empress",
 487         .fops          = &ts_fops,
 488         .ioctl_ops     = &ts_ioctl_ops,
 489
 490         .tvnorms                        = SAA7134_NORMS,
 491         .current_norm                   = V4L2_STD_PAL,
 492 };
 493
 494 static void empress_signal_update(struct work_struct *work)
 495 {
 496         struct saa7134_dev* dev =
 497                 container_of(work, struct saa7134_dev, empress_workqueue);
 498
 499         if (dev->nosignal) {
 500                 dprintk("no video signal\n");
 501         } else {
 502                 dprintk("video signal acquired\n");
 503         }
 504 }
 505
 506 static void empress_signal_change(struct saa7134_dev *dev)
 507 {
 508         schedule_work(&dev->empress_workqueue);
 509 }
 510
 511
 512 static int empress_init(struct saa7134_dev *dev)
 513 {
 514         int err;
 515
 516         dprintk("%s: %s\n",dev->name,__func__);
 517         dev->empress_dev = video_device_alloc();
 518         if (NULL == dev->empress_dev)
 519                 return -ENOMEM;
 520         *(dev->empress_dev) = saa7134_empress_template;
 521         dev->empress_dev->parent  = &dev->pci->dev;
 522         dev->empress_dev->release = video_device_release;
 523         snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
 524                  "%s empress (%s)", dev->name,
 525                  saa7134_boards[dev->board].name);
 526
 527         INIT_WORK(&dev->empress_workqueue, empress_signal_update);
 528
 529         video_set_drvdata(dev->empress_dev, dev);
 530         err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
 531                                     empress_nr[dev->nr]);
 532         if (err < 0) {
 533                 printk(KERN_INFO "%s: can't register video device\n",
 534                        dev->name);
 535                 video_device_release(dev->empress_dev);
 536                 dev->empress_dev = NULL;
 537                 return err;
 538         }
 539         printk(KERN_INFO "%s: registered device %s [mpeg]\n",
 540                dev->name, video_device_node_name(dev->empress_dev));
 541
 542         videobuf_queue_sg_init(&dev->empress_tsq, &saa7134_ts_qops,
 543                             &dev->pci->dev, &dev->slock,
 544                             V4L2_BUF_TYPE_VIDEO_CAPTURE,
 545                             V4L2_FIELD_ALTERNATE,
 546                             sizeof(struct saa7134_buf),
 547                             dev, NULL);
 548
 549         empress_signal_update(&dev->empress_workqueue);
 550         return 0;
 551 }
 552
 553 static int empress_fini(struct saa7134_dev *dev)
 554 {
 555         dprintk("%s: %s\n",dev->name,__func__);
 556
 557         if (NULL == dev->empress_dev)
 558                 return 0;
 559         flush_work_sync(&dev->empress_workqueue);
 560         video_unregister_device(dev->empress_dev);
 561         dev->empress_dev = NULL;
 562         return 0;
 563 }
 564
 565 static struct saa7134_mpeg_ops empress_ops = {
 566         .type          = SAA7134_MPEG_EMPRESS,
 567         .init          = empress_init,
 568         .fini          = empress_fini,
 569         .signal_change = empress_signal_change,
 570 };
 571
 572 static int __init empress_register(void)
 573 {
 574         return saa7134_ts_register(&empress_ops);
 575 }
 576
 577 static void __exit empress_unregister(void)
 578 {
 579         saa7134_ts_unregister(&empress_ops);
 580 }
 581
 582 module_init(empress_register);
 583 module_exit(empress_unregister);
 584
 585 /* ----------------------------------------------------------- */
 586 /*
 587  * Local variables:
 588  * c-basic-offset: 8
 589  * End:
 590  */