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->version = SAA7134_VERSION_CODE;
 176         cap->capabilities =
 177                 V4L2_CAP_VIDEO_CAPTURE |
 178                 V4L2_CAP_READWRITE |
 179                 V4L2_CAP_STREAMING;
 180         return 0;
 181 }
 182
 183 static int empress_enum_input(struct file *file, void *priv,
 184                                         struct v4l2_input *i)
 185 {
 186         if (i->index != 0)
 187                 return -EINVAL;
 188
 189         i->type = V4L2_INPUT_TYPE_CAMERA;
 190         strcpy(i->name, "CCIR656");
 191
 192         return 0;
 193 }
 194
 195 static int empress_g_input(struct file *file, void *priv, unsigned int *i)
 196 {
 197         *i = 0;
 198         return 0;
 199 }
 200
 201 static int empress_s_input(struct file *file, void *priv, unsigned int i)
 202 {
 203         if (i != 0)
 204                 return -EINVAL;
 205
 206         return 0;
 207 }
 208
 209 static int empress_enum_fmt_vid_cap(struct file *file, void  *priv,
 210                                         struct v4l2_fmtdesc *f)
 211 {
 212         if (f->index != 0)
 213                 return -EINVAL;
 214
 215         strlcpy(f->description, "MPEG TS", sizeof(f->description));
 216         f->pixelformat = V4L2_PIX_FMT_MPEG;
 217
 218         return 0;
 219 }
 220
 221 static int empress_g_fmt_vid_cap(struct file *file, void *priv,
 222                                 struct v4l2_format *f)
 223 {
 224         struct saa7134_dev *dev = file->private_data;
 225         struct v4l2_mbus_framefmt mbus_fmt;
 226
 227         saa_call_all(dev, video, g_mbus_fmt, &mbus_fmt);
 228
 229         v4l2_fill_pix_format(&f->fmt.pix, &mbus_fmt);
 230         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 231         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 232
 233         return 0;
 234 }
 235
 236 static int empress_s_fmt_vid_cap(struct file *file, void *priv,
 237                                 struct v4l2_format *f)
 238 {
 239         struct saa7134_dev *dev = file->private_data;
 240         struct v4l2_mbus_framefmt mbus_fmt;
 241
 242         v4l2_fill_mbus_format(&mbus_fmt, &f->fmt.pix, V4L2_MBUS_FMT_FIXED);
 243         saa_call_all(dev, video, s_mbus_fmt, &mbus_fmt);
 244         v4l2_fill_pix_format(&f->fmt.pix, &mbus_fmt);
 245
 246         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 247         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 248
 249         return 0;
 250 }
 251
 252 static int empress_try_fmt_vid_cap(struct file *file, void *priv,
 253                                 struct v4l2_format *f)
 254 {
 255         struct saa7134_dev *dev = file->private_data;
 256
 257         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 258         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 259
 260         return 0;
 261 }
 262
 263 static int empress_reqbufs(struct file *file, void *priv,
 264                                         struct v4l2_requestbuffers *p)
 265 {
 266         struct saa7134_dev *dev = file->private_data;
 267
 268         return videobuf_reqbufs(&dev->empress_tsq, p);
 269 }
 270
 271 static int empress_querybuf(struct file *file, void *priv,
 272                                         struct v4l2_buffer *b)
 273 {
 274         struct saa7134_dev *dev = file->private_data;
 275
 276         return videobuf_querybuf(&dev->empress_tsq, b);
 277 }
 278
 279 static int empress_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
 280 {
 281         struct saa7134_dev *dev = file->private_data;
 282
 283         return videobuf_qbuf(&dev->empress_tsq, b);
 284 }
 285
 286 static int empress_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
 287 {
 288         struct saa7134_dev *dev = file->private_data;
 289
 290         return videobuf_dqbuf(&dev->empress_tsq, b,
 291                                 file->f_flags & O_NONBLOCK);
 292 }
 293
 294 static int empress_streamon(struct file *file, void *priv,
 295                                         enum v4l2_buf_type type)
 296 {
 297         struct saa7134_dev *dev = file->private_data;
 298
 299         return videobuf_streamon(&dev->empress_tsq);
 300 }
 301
 302 static int empress_streamoff(struct file *file, void *priv,
 303                                         enum v4l2_buf_type type)
 304 {
 305         struct saa7134_dev *dev = file->private_data;
 306
 307         return videobuf_streamoff(&dev->empress_tsq);
 308 }
 309
 310 static int empress_s_ext_ctrls(struct file *file, void *priv,
 311                                struct v4l2_ext_controls *ctrls)
 312 {
 313         struct saa7134_dev *dev = file->private_data;
 314         int err;
 315
 316         /* count == 0 is abused in saa6752hs.c, so that special
 317                 case is handled here explicitly. */
 318         if (ctrls->count == 0)
 319                 return 0;
 320
 321         if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 322                 return -EINVAL;
 323
 324         err = saa_call_empress(dev, core, s_ext_ctrls, ctrls);
 325         ts_init_encoder(dev);
 326
 327         return err;
 328 }
 329
 330 static int empress_g_ext_ctrls(struct file *file, void *priv,
 331                                struct v4l2_ext_controls *ctrls)
 332 {
 333         struct saa7134_dev *dev = file->private_data;
 334
 335         if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 336                 return -EINVAL;
 337         return saa_call_empress(dev, core, g_ext_ctrls, ctrls);
 338 }
 339
 340 static int empress_g_ctrl(struct file *file, void *priv,
 341                                         struct v4l2_control *c)
 342 {
 343         struct saa7134_dev *dev = file->private_data;
 344
 345         return saa7134_g_ctrl_internal(dev, NULL, c);
 346 }
 347
 348 static int empress_s_ctrl(struct file *file, void *priv,
 349                                         struct v4l2_control *c)
 350 {
 351         struct saa7134_dev *dev = file->private_data;
 352
 353         return saa7134_s_ctrl_internal(dev, NULL, c);
 354 }
 355
 356 static int empress_queryctrl(struct file *file, void *priv,
 357                                         struct v4l2_queryctrl *c)
 358 {
 359         /* Must be sorted from low to high control ID! */
 360         static const u32 user_ctrls[] = {
 361                 V4L2_CID_USER_CLASS,
 362                 V4L2_CID_BRIGHTNESS,
 363                 V4L2_CID_CONTRAST,
 364                 V4L2_CID_SATURATION,
 365                 V4L2_CID_HUE,
 366                 V4L2_CID_AUDIO_VOLUME,
 367                 V4L2_CID_AUDIO_MUTE,
 368                 V4L2_CID_HFLIP,
 369                 0
 370         };
 371
 372         /* Must be sorted from low to high control ID! */
 373         static const u32 mpeg_ctrls[] = {
 374                 V4L2_CID_MPEG_CLASS,
 375                 V4L2_CID_MPEG_STREAM_TYPE,
 376                 V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ,
 377                 V4L2_CID_MPEG_AUDIO_ENCODING,
 378                 V4L2_CID_MPEG_AUDIO_L2_BITRATE,
 379                 V4L2_CID_MPEG_VIDEO_ENCODING,
 380                 V4L2_CID_MPEG_VIDEO_ASPECT,
 381                 V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
 382                 V4L2_CID_MPEG_VIDEO_BITRATE,
 383                 V4L2_CID_MPEG_VIDEO_BITRATE_PEAK,
 384                 0
 385         };
 386         static const u32 *ctrl_classes[] = {
 387                 user_ctrls,
 388                 mpeg_ctrls,
 389                 NULL
 390         };
 391         struct saa7134_dev *dev = file->private_data;
 392
 393         c->id = v4l2_ctrl_next(ctrl_classes, c->id);
 394         if (c->id == 0)
 395                 return -EINVAL;
 396         if (c->id == V4L2_CID_USER_CLASS || c->id == V4L2_CID_MPEG_CLASS)
 397                 return v4l2_ctrl_query_fill(c, 0, 0, 0, 0);
 398         if (V4L2_CTRL_ID2CLASS(c->id) != V4L2_CTRL_CLASS_MPEG)
 399                 return saa7134_queryctrl(file, priv, c);
 400         return saa_call_empress(dev, core, queryctrl, c);
 401 }
 402
 403 static int empress_querymenu(struct file *file, void *priv,
 404                                         struct v4l2_querymenu *c)
 405 {
 406         struct saa7134_dev *dev = file->private_data;
 407
 408         if (V4L2_CTRL_ID2CLASS(c->id) != V4L2_CTRL_CLASS_MPEG)
 409                 return -EINVAL;
 410         return saa_call_empress(dev, core, querymenu, c);
 411 }
 412
 413 static int empress_g_chip_ident(struct file *file, void *fh,
 414                struct v4l2_dbg_chip_ident *chip)
 415 {
 416         struct saa7134_dev *dev = file->private_data;
 417
 418         chip->ident = V4L2_IDENT_NONE;
 419         chip->revision = 0;
 420         if (chip->match.type == V4L2_CHIP_MATCH_I2C_DRIVER &&
 421             !strcmp(chip->match.name, "saa6752hs"))
 422                 return saa_call_empress(dev, core, g_chip_ident, chip);
 423         if (chip->match.type == V4L2_CHIP_MATCH_I2C_ADDR)
 424                 return saa_call_empress(dev, core, g_chip_ident, chip);
 425         return -EINVAL;
 426 }
 427
 428 static int empress_s_std(struct file *file, void *priv, v4l2_std_id *id)
 429 {
 430         struct saa7134_dev *dev = file->private_data;
 431
 432         return saa7134_s_std_internal(dev, NULL, id);
 433 }
 434
 435 static int empress_g_std(struct file *file, void *priv, v4l2_std_id *id)
 436 {
 437         struct saa7134_dev *dev = file->private_data;
 438
 439         *id = dev->tvnorm->id;
 440         return 0;
 441 }
 442
 443 static const struct v4l2_file_operations ts_fops =
 444 {
 445         .owner    = THIS_MODULE,
 446         .open     = ts_open,
 447         .release  = ts_release,
 448         .read     = ts_read,
 449         .poll     = ts_poll,
 450         .mmap     = ts_mmap,
 451         .ioctl    = video_ioctl2,
 452 };
 453
 454 static const struct v4l2_ioctl_ops ts_ioctl_ops = {
 455         .vidioc_querycap                = empress_querycap,
 456         .vidioc_enum_fmt_vid_cap        = empress_enum_fmt_vid_cap,
 457         .vidioc_try_fmt_vid_cap         = empress_try_fmt_vid_cap,
 458         .vidioc_s_fmt_vid_cap           = empress_s_fmt_vid_cap,
 459         .vidioc_g_fmt_vid_cap           = empress_g_fmt_vid_cap,
 460         .vidioc_reqbufs                 = empress_reqbufs,
 461         .vidioc_querybuf                = empress_querybuf,
 462         .vidioc_qbuf                    = empress_qbuf,
 463         .vidioc_dqbuf                   = empress_dqbuf,
 464         .vidioc_streamon                = empress_streamon,
 465         .vidioc_streamoff               = empress_streamoff,
 466         .vidioc_s_ext_ctrls             = empress_s_ext_ctrls,
 467         .vidioc_g_ext_ctrls             = empress_g_ext_ctrls,
 468         .vidioc_enum_input              = empress_enum_input,
 469         .vidioc_g_input                 = empress_g_input,
 470         .vidioc_s_input                 = empress_s_input,
 471         .vidioc_queryctrl               = empress_queryctrl,
 472         .vidioc_querymenu               = empress_querymenu,
 473         .vidioc_g_ctrl                  = empress_g_ctrl,
 474         .vidioc_s_ctrl                  = empress_s_ctrl,
 475         .vidioc_g_chip_ident            = empress_g_chip_ident,
 476         .vidioc_s_std                   = empress_s_std,
 477         .vidioc_g_std                   = empress_g_std,
 478 };
 479
 480 /* ----------------------------------------------------------- */
 481
 482 static struct video_device saa7134_empress_template = {
 483         .name          = "saa7134-empress",
 484         .fops          = &ts_fops,
 485         .ioctl_ops     = &ts_ioctl_ops,
 486
 487         .tvnorms                        = SAA7134_NORMS,
 488         .current_norm                   = V4L2_STD_PAL,
 489 };
 490
 491 static void empress_signal_update(struct work_struct *work)
 492 {
 493         struct saa7134_dev* dev =
 494                 container_of(work, struct saa7134_dev, empress_workqueue);
 495
 496         if (dev->nosignal) {
 497                 dprintk("no video signal\n");
 498         } else {
 499                 dprintk("video signal acquired\n");
 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         video_set_drvdata(dev->empress_dev, dev);
 527         err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
 528                                     empress_nr[dev->nr]);
 529         if (err < 0) {
 530                 printk(KERN_INFO "%s: can't register video device\n",
 531                        dev->name);
 532                 video_device_release(dev->empress_dev);
 533                 dev->empress_dev = NULL;
 534                 return err;
 535         }
 536         printk(KERN_INFO "%s: registered device %s [mpeg]\n",
 537                dev->name, video_device_node_name(dev->empress_dev));
 538
 539         videobuf_queue_sg_init(&dev->empress_tsq, &saa7134_ts_qops,
 540                             &dev->pci->dev, &dev->slock,
 541                             V4L2_BUF_TYPE_VIDEO_CAPTURE,
 542                             V4L2_FIELD_ALTERNATE,
 543                             sizeof(struct saa7134_buf),
 544                             dev, NULL);
 545
 546         empress_signal_update(&dev->empress_workqueue);
 547         return 0;
 548 }
 549
 550 static int empress_fini(struct saa7134_dev *dev)
 551 {
 552         dprintk("%s: %s\n",dev->name,__func__);
 553
 554         if (NULL == dev->empress_dev)
 555                 return 0;
 556         flush_work_sync(&dev->empress_workqueue);
 557         video_unregister_device(dev->empress_dev);
 558         dev->empress_dev = NULL;
 559         return 0;
 560 }
 561
 562 static struct saa7134_mpeg_ops empress_ops = {
 563         .type          = SAA7134_MPEG_EMPRESS,
 564         .init          = empress_init,
 565         .fini          = empress_fini,
 566         .signal_change = empress_signal_change,
 567 };
 568
 569 static int __init empress_register(void)
 570 {
 571         return saa7134_ts_register(&empress_ops);
 572 }
 573
 574 static void __exit empress_unregister(void)
 575 {
 576         saa7134_ts_unregister(&empress_ops);
 577 }
 578
 579 module_init(empress_register);
 580 module_exit(empress_unregister);
 581
 582 /* ----------------------------------------------------------- */
 583 /*
 584  * Local variables:
 585  * c-basic-offset: 8
 586  * End:
 587  */