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/smp_lock.h>
  26 #include <linux/delay.h>
  27
  28 #include "saa7134-reg.h"
  29 #include "saa7134.h"
  30
  31 #include <media/saa6752hs.h>
  32 #include <media/v4l2-common.h>
  33 #include <media/v4l2-chip-ident.h>
  34
  35 /* ------------------------------------------------------------------ */
  36
  37 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
  38 MODULE_LICENSE("GPL");
  39
  40 static unsigned int empress_nr[] = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET };
  41
  42 module_param_array(empress_nr, int, NULL, 0444);
  43 MODULE_PARM_DESC(empress_nr,"ts device number");
  44
  45 static unsigned int debug;
  46 module_param(debug, int, 0644);
  47 MODULE_PARM_DESC(debug,"enable debug messages");
  48
  49 #define dprintk(fmt, arg...)    if (debug)                      \
  50         printk(KERN_DEBUG "%s/empress: " fmt, dev->name , ## arg)
  51
  52 /* ------------------------------------------------------------------ */
  53
  54 static void ts_reset_encoder(struct saa7134_dev* dev)
  55 {
  56         if (!dev->empress_started)
  57                 return;
  58
  59         saa_writeb(SAA7134_SPECIAL_MODE, 0x00);
  60         msleep(10);
  61         saa_writeb(SAA7134_SPECIAL_MODE, 0x01);
  62         msleep(100);
  63         dev->empress_started = 0;
  64 }
  65
  66 static int ts_init_encoder(struct saa7134_dev* dev)
  67 {
  68         u32 leading_null_bytes = 0;
  69
  70         /* If more cards start to need this, then this
  71            should probably be added to the card definitions. */
  72         switch (dev->board) {
  73         case SAA7134_BOARD_BEHOLD_M6:
  74         case SAA7134_BOARD_BEHOLD_M63:
  75         case SAA7134_BOARD_BEHOLD_M6_EXTRA:
  76                 leading_null_bytes = 1;
  77                 break;
  78         }
  79         ts_reset_encoder(dev);
  80         saa_call_all(dev, core, init, leading_null_bytes);
  81         dev->empress_started = 1;
  82         return 0;
  83 }
  84
  85 /* ------------------------------------------------------------------ */
  86
  87 static int ts_open(struct file *file)
  88 {
  89         int minor = video_devdata(file)->minor;
  90         struct saa7134_dev *dev;
  91         int err;
  92
  93         lock_kernel();
  94         list_for_each_entry(dev, &saa7134_devlist, devlist)
  95                 if (dev->empress_dev && dev->empress_dev->minor == minor)
  96                         goto found;
  97         unlock_kernel();
  98         return -ENODEV;
  99  found:
 100
 101         dprintk("open minor=%d\n",minor);
 102         err = -EBUSY;
 103         if (!mutex_trylock(&dev->empress_tsq.vb_lock))
 104                 goto done;
 105         if (atomic_read(&dev->empress_users))
 106                 goto done_up;
 107
 108         /* Unmute audio */
 109         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
 110                 saa_readb(SAA7134_AUDIO_MUTE_CTRL) & ~(1 << 6));
 111
 112         atomic_inc(&dev->empress_users);
 113         file->private_data = dev;
 114         err = 0;
 115
 116 done_up:
 117         mutex_unlock(&dev->empress_tsq.vb_lock);
 118 done:
 119         unlock_kernel();
 120         return err;
 121 }
 122
 123 static int ts_release(struct file *file)
 124 {
 125         struct saa7134_dev *dev = file->private_data;
 126
 127         videobuf_stop(&dev->empress_tsq);
 128         videobuf_mmap_free(&dev->empress_tsq);
 129
 130         /* stop the encoder */
 131         ts_reset_encoder(dev);
 132
 133         /* Mute audio */
 134         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
 135                 saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6));
 136
 137         atomic_dec(&dev->empress_users);
 138
 139         return 0;
 140 }
 141
 142 static ssize_t
 143 ts_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
 144 {
 145         struct saa7134_dev *dev = file->private_data;
 146
 147         if (!dev->empress_started)
 148                 ts_init_encoder(dev);
 149
 150         return videobuf_read_stream(&dev->empress_tsq,
 151                                     data, count, ppos, 0,
 152                                     file->f_flags & O_NONBLOCK);
 153 }
 154
 155 static unsigned int
 156 ts_poll(struct file *file, struct poll_table_struct *wait)
 157 {
 158         struct saa7134_dev *dev = file->private_data;
 159
 160         return videobuf_poll_stream(file, &dev->empress_tsq, wait);
 161 }
 162
 163
 164 static int
 165 ts_mmap(struct file *file, struct vm_area_struct * vma)
 166 {
 167         struct saa7134_dev *dev = file->private_data;
 168
 169         return videobuf_mmap_mapper(&dev->empress_tsq, vma);
 170 }
 171
 172 /*
 173  * This function is _not_ called directly, but from
 174  * video_generic_ioctl (and maybe others).  userspace
 175  * copying is done already, arg is a kernel pointer.
 176  */
 177
 178 static int empress_querycap(struct file *file, void  *priv,
 179                                         struct v4l2_capability *cap)
 180 {
 181         struct saa7134_dev *dev = file->private_data;
 182
 183         strcpy(cap->driver, "saa7134");
 184         strlcpy(cap->card, saa7134_boards[dev->board].name,
 185                 sizeof(cap->card));
 186         sprintf(cap->bus_info, "PCI:%s", pci_name(dev->pci));
 187         cap->version = SAA7134_VERSION_CODE;
 188         cap->capabilities =
 189                 V4L2_CAP_VIDEO_CAPTURE |
 190                 V4L2_CAP_READWRITE |
 191                 V4L2_CAP_STREAMING;
 192         return 0;
 193 }
 194
 195 static int empress_enum_input(struct file *file, void *priv,
 196                                         struct v4l2_input *i)
 197 {
 198         if (i->index != 0)
 199                 return -EINVAL;
 200
 201         i->type = V4L2_INPUT_TYPE_CAMERA;
 202         strcpy(i->name, "CCIR656");
 203
 204         return 0;
 205 }
 206
 207 static int empress_g_input(struct file *file, void *priv, unsigned int *i)
 208 {
 209         *i = 0;
 210         return 0;
 211 }
 212
 213 static int empress_s_input(struct file *file, void *priv, unsigned int i)
 214 {
 215         if (i != 0)
 216                 return -EINVAL;
 217
 218         return 0;
 219 }
 220
 221 static int empress_enum_fmt_vid_cap(struct file *file, void  *priv,
 222                                         struct v4l2_fmtdesc *f)
 223 {
 224         if (f->index != 0)
 225                 return -EINVAL;
 226
 227         strlcpy(f->description, "MPEG TS", sizeof(f->description));
 228         f->pixelformat = V4L2_PIX_FMT_MPEG;
 229
 230         return 0;
 231 }
 232
 233 static int empress_g_fmt_vid_cap(struct file *file, void *priv,
 234                                 struct v4l2_format *f)
 235 {
 236         struct saa7134_dev *dev = file->private_data;
 237
 238         saa_call_all(dev, video, g_fmt, f);
 239
 240         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 241         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 242
 243         return 0;
 244 }
 245
 246 static int empress_s_fmt_vid_cap(struct file *file, void *priv,
 247                                 struct v4l2_format *f)
 248 {
 249         struct saa7134_dev *dev = file->private_data;
 250
 251         saa_call_all(dev, video, s_fmt, f);
 252
 253         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 254         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 255
 256         return 0;
 257 }
 258
 259 static int empress_try_fmt_vid_cap(struct file *file, void *priv,
 260                                 struct v4l2_format *f)
 261 {
 262         struct saa7134_dev *dev = file->private_data;
 263
 264         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 265         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 266
 267         return 0;
 268 }
 269
 270 static int empress_reqbufs(struct file *file, void *priv,
 271                                         struct v4l2_requestbuffers *p)
 272 {
 273         struct saa7134_dev *dev = file->private_data;
 274
 275         return videobuf_reqbufs(&dev->empress_tsq, p);
 276 }
 277
 278 static int empress_querybuf(struct file *file, void *priv,
 279                                         struct v4l2_buffer *b)
 280 {
 281         struct saa7134_dev *dev = file->private_data;
 282
 283         return videobuf_querybuf(&dev->empress_tsq, b);
 284 }
 285
 286 static int empress_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
 287 {
 288         struct saa7134_dev *dev = file->private_data;
 289
 290         return videobuf_qbuf(&dev->empress_tsq, b);
 291 }
 292
 293 static int empress_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
 294 {
 295         struct saa7134_dev *dev = file->private_data;
 296
 297         return videobuf_dqbuf(&dev->empress_tsq, b,
 298                                 file->f_flags & O_NONBLOCK);
 299 }
 300
 301 static int empress_streamon(struct file *file, void *priv,
 302                                         enum v4l2_buf_type type)
 303 {
 304         struct saa7134_dev *dev = file->private_data;
 305
 306         return videobuf_streamon(&dev->empress_tsq);
 307 }
 308
 309 static int empress_streamoff(struct file *file, void *priv,
 310                                         enum v4l2_buf_type type)
 311 {
 312         struct saa7134_dev *dev = file->private_data;
 313
 314         return videobuf_streamoff(&dev->empress_tsq);
 315 }
 316
 317 static int empress_s_ext_ctrls(struct file *file, void *priv,
 318                                struct v4l2_ext_controls *ctrls)
 319 {
 320         struct saa7134_dev *dev = file->private_data;
 321         int err;
 322
 323         /* count == 0 is abused in saa6752hs.c, so that special
 324                 case is handled here explicitly. */
 325         if (ctrls->count == 0)
 326                 return 0;
 327
 328         if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 329                 return -EINVAL;
 330
 331         err = saa_call_empress(dev, core, s_ext_ctrls, ctrls);
 332         ts_init_encoder(dev);
 333
 334         return err;
 335 }
 336
 337 static int empress_g_ext_ctrls(struct file *file, void *priv,
 338                                struct v4l2_ext_controls *ctrls)
 339 {
 340         struct saa7134_dev *dev = file->private_data;
 341
 342         if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 343                 return -EINVAL;
 344         return saa_call_empress(dev, core, g_ext_ctrls, ctrls);
 345 }
 346
 347 static int empress_g_ctrl(struct file *file, void *priv,
 348                                         struct v4l2_control *c)
 349 {
 350         struct saa7134_dev *dev = file->private_data;
 351
 352         return saa7134_g_ctrl_internal(dev, NULL, c);
 353 }
 354
 355 static int empress_s_ctrl(struct file *file, void *priv,
 356                                         struct v4l2_control *c)
 357 {
 358         struct saa7134_dev *dev = file->private_data;
 359
 360         return saa7134_s_ctrl_internal(dev, NULL, c);
 361 }
 362
 363 static int empress_queryctrl(struct file *file, void *priv,
 364                                         struct v4l2_queryctrl *c)
 365 {
 366         /* Must be sorted from low to high control ID! */
 367         static const u32 user_ctrls[] = {
 368                 V4L2_CID_USER_CLASS,
 369                 V4L2_CID_BRIGHTNESS,
 370                 V4L2_CID_CONTRAST,
 371                 V4L2_CID_SATURATION,
 372                 V4L2_CID_HUE,
 373                 V4L2_CID_AUDIO_VOLUME,
 374                 V4L2_CID_AUDIO_MUTE,
 375                 V4L2_CID_HFLIP,
 376                 0
 377         };
 378
 379         /* Must be sorted from low to high control ID! */
 380         static const u32 mpeg_ctrls[] = {
 381                 V4L2_CID_MPEG_CLASS,
 382                 V4L2_CID_MPEG_STREAM_TYPE,
 383                 V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ,
 384                 V4L2_CID_MPEG_AUDIO_ENCODING,
 385                 V4L2_CID_MPEG_AUDIO_L2_BITRATE,
 386                 V4L2_CID_MPEG_VIDEO_ENCODING,
 387                 V4L2_CID_MPEG_VIDEO_ASPECT,
 388                 V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
 389                 V4L2_CID_MPEG_VIDEO_BITRATE,
 390                 V4L2_CID_MPEG_VIDEO_BITRATE_PEAK,
 391                 0
 392         };
 393         static const u32 *ctrl_classes[] = {
 394                 user_ctrls,
 395                 mpeg_ctrls,
 396                 NULL
 397         };
 398         struct saa7134_dev *dev = file->private_data;
 399
 400         c->id = v4l2_ctrl_next(ctrl_classes, c->id);
 401         if (c->id == 0)
 402                 return -EINVAL;
 403         if (c->id == V4L2_CID_USER_CLASS || c->id == V4L2_CID_MPEG_CLASS)
 404                 return v4l2_ctrl_query_fill(c, 0, 0, 0, 0);
 405         if (V4L2_CTRL_ID2CLASS(c->id) != V4L2_CTRL_CLASS_MPEG)
 406                 return saa7134_queryctrl(file, priv, c);
 407         return saa_call_empress(dev, core, queryctrl, c);
 408 }
 409
 410 static int empress_querymenu(struct file *file, void *priv,
 411                                         struct v4l2_querymenu *c)
 412 {
 413         struct saa7134_dev *dev = file->private_data;
 414
 415         if (V4L2_CTRL_ID2CLASS(c->id) != V4L2_CTRL_CLASS_MPEG)
 416                 return -EINVAL;
 417         return saa_call_empress(dev, core, querymenu, c);
 418 }
 419
 420 static int empress_g_chip_ident(struct file *file, void *fh,
 421                struct v4l2_dbg_chip_ident *chip)
 422 {
 423         struct saa7134_dev *dev = file->private_data;
 424
 425         chip->ident = V4L2_IDENT_NONE;
 426         chip->revision = 0;
 427         if (chip->match.type == V4L2_CHIP_MATCH_I2C_DRIVER &&
 428             !strcmp(chip->match.name, "saa6752hs"))
 429                 return saa_call_empress(dev, core, g_chip_ident, chip);
 430         if (chip->match.type == V4L2_CHIP_MATCH_I2C_ADDR)
 431                 return saa_call_empress(dev, core, g_chip_ident, chip);
 432         return -EINVAL;
 433 }
 434
 435 static int empress_s_std(struct file *file, void *priv, v4l2_std_id *id)
 436 {
 437         struct saa7134_dev *dev = file->private_data;
 438
 439         return saa7134_s_std_internal(dev, NULL, id);
 440 }
 441
 442 static int empress_g_std(struct file *file, void *priv, v4l2_std_id *id)
 443 {
 444         struct saa7134_dev *dev = file->private_data;
 445
 446         *id = dev->tvnorm->id;
 447         return 0;
 448 }
 449
 450 static const struct v4l2_file_operations ts_fops =
 451 {
 452         .owner    = THIS_MODULE,
 453         .open     = ts_open,
 454         .release  = ts_release,
 455         .read     = ts_read,
 456         .poll     = ts_poll,
 457         .mmap     = ts_mmap,
 458         .ioctl    = video_ioctl2,
 459 };
 460
 461 static const struct v4l2_ioctl_ops ts_ioctl_ops = {
 462         .vidioc_querycap                = empress_querycap,
 463         .vidioc_enum_fmt_vid_cap        = empress_enum_fmt_vid_cap,
 464         .vidioc_try_fmt_vid_cap         = empress_try_fmt_vid_cap,
 465         .vidioc_s_fmt_vid_cap           = empress_s_fmt_vid_cap,
 466         .vidioc_g_fmt_vid_cap           = empress_g_fmt_vid_cap,
 467         .vidioc_reqbufs                 = empress_reqbufs,
 468         .vidioc_querybuf                = empress_querybuf,
 469         .vidioc_qbuf                    = empress_qbuf,
 470         .vidioc_dqbuf                   = empress_dqbuf,
 471         .vidioc_streamon                = empress_streamon,
 472         .vidioc_streamoff               = empress_streamoff,
 473         .vidioc_s_ext_ctrls             = empress_s_ext_ctrls,
 474         .vidioc_g_ext_ctrls             = empress_g_ext_ctrls,
 475         .vidioc_enum_input              = empress_enum_input,
 476         .vidioc_g_input                 = empress_g_input,
 477         .vidioc_s_input                 = empress_s_input,
 478         .vidioc_queryctrl               = empress_queryctrl,
 479         .vidioc_querymenu               = empress_querymenu,
 480         .vidioc_g_ctrl                  = empress_g_ctrl,
 481         .vidioc_s_ctrl                  = empress_s_ctrl,
 482         .vidioc_g_chip_ident            = empress_g_chip_ident,
 483         .vidioc_s_std                   = empress_s_std,
 484         .vidioc_g_std                   = empress_g_std,
 485 };
 486
 487 /* ----------------------------------------------------------- */
 488
 489 static struct video_device saa7134_empress_template = {
 490         .name          = "saa7134-empress",
 491         .fops          = &ts_fops,
 492         .minor         = -1,
 493         .ioctl_ops     = &ts_ioctl_ops,
 494
 495         .tvnorms                        = SAA7134_NORMS,
 496         .current_norm                   = V4L2_STD_PAL,
 497 };
 498
 499 static void empress_signal_update(struct work_struct *work)
 500 {
 501         struct saa7134_dev* dev =
 502                 container_of(work, struct saa7134_dev, empress_workqueue);
 503
 504         if (dev->nosignal) {
 505                 dprintk("no video signal\n");
 506         } else {
 507                 dprintk("video signal acquired\n");
 508         }
 509 }
 510
 511 static void empress_signal_change(struct saa7134_dev *dev)
 512 {
 513         schedule_work(&dev->empress_workqueue);
 514 }
 515
 516
 517 static int empress_init(struct saa7134_dev *dev)
 518 {
 519         int err;
 520
 521         dprintk("%s: %s\n",dev->name,__func__);
 522         dev->empress_dev = video_device_alloc();
 523         if (NULL == dev->empress_dev)
 524                 return -ENOMEM;
 525         *(dev->empress_dev) = saa7134_empress_template;
 526         dev->empress_dev->parent  = &dev->pci->dev;
 527         dev->empress_dev->release = video_device_release;
 528         snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
 529                  "%s empress (%s)", dev->name,
 530                  saa7134_boards[dev->board].name);
 531
 532         INIT_WORK(&dev->empress_workqueue, empress_signal_update);
 533
 534         err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
 535                                     empress_nr[dev->nr]);
 536         if (err < 0) {
 537                 printk(KERN_INFO "%s: can't register video device\n",
 538                        dev->name);
 539                 video_device_release(dev->empress_dev);
 540                 dev->empress_dev = NULL;
 541                 return err;
 542         }
 543         printk(KERN_INFO "%s: registered device video%d [mpeg]\n",
 544                dev->name, dev->empress_dev->num);
 545
 546         videobuf_queue_sg_init(&dev->empress_tsq, &saa7134_ts_qops,
 547                             &dev->pci->dev, &dev->slock,
 548                             V4L2_BUF_TYPE_VIDEO_CAPTURE,
 549                             V4L2_FIELD_ALTERNATE,
 550                             sizeof(struct saa7134_buf),
 551                             dev);
 552
 553         empress_signal_update(&dev->empress_workqueue);
 554         return 0;
 555 }
 556
 557 static int empress_fini(struct saa7134_dev *dev)
 558 {
 559         dprintk("%s: %s\n",dev->name,__func__);
 560
 561         if (NULL == dev->empress_dev)
 562                 return 0;
 563         flush_scheduled_work();
 564         video_unregister_device(dev->empress_dev);
 565         dev->empress_dev = NULL;
 566         return 0;
 567 }
 568
 569 static struct saa7134_mpeg_ops empress_ops = {
 570         .type          = SAA7134_MPEG_EMPRESS,
 571         .init          = empress_init,
 572         .fini          = empress_fini,
 573         .signal_change = empress_signal_change,
 574 };
 575
 576 static int __init empress_register(void)
 577 {
 578         return saa7134_ts_register(&empress_ops);
 579 }
 580
 581 static void __exit empress_unregister(void)
 582 {
 583         saa7134_ts_unregister(&empress_ops);
 584 }
 585
 586 module_init(empress_register);
 587 module_exit(empress_unregister);
 588
 589 /* ----------------------------------------------------------- */
 590 /*
 591  * Local variables:
 592  * c-basic-offset: 8
 593  * End:
 594  */