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         struct video_device *vdev = video_devdata(file);
  90         struct saa7134_dev *dev = video_drvdata(file);
  91         int err;
  92
  93         dprintk("open dev=%s\n", video_device_node_name(vdev));
  94         err = -EBUSY;
  95         if (!mutex_trylock(&dev->empress_tsq.vb_lock))
  96                 return err;
  97         if (atomic_read(&dev->empress_users))
  98                 goto done;
  99
 100         /* Unmute audio */
 101         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
 102                 saa_readb(SAA7134_AUDIO_MUTE_CTRL) & ~(1 << 6));
 103
 104         atomic_inc(&dev->empress_users);
 105         file->private_data = dev;
 106         err = 0;
 107
 108 done:
 109         mutex_unlock(&dev->empress_tsq.vb_lock);
 110         return err;
 111 }
 112
 113 static int ts_release(struct file *file)
 114 {
 115         struct saa7134_dev *dev = file->private_data;
 116
 117         videobuf_stop(&dev->empress_tsq);
 118         videobuf_mmap_free(&dev->empress_tsq);
 119
 120         /* stop the encoder */
 121         ts_reset_encoder(dev);
 122
 123         /* Mute audio */
 124         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
 125                 saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6));
 126
 127         atomic_dec(&dev->empress_users);
 128
 129         return 0;
 130 }
 131
 132 static ssize_t
 133 ts_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
 134 {
 135         struct saa7134_dev *dev = file->private_data;
 136
 137         if (!dev->empress_started)
 138                 ts_init_encoder(dev);
 139
 140         return videobuf_read_stream(&dev->empress_tsq,
 141                                     data, count, ppos, 0,
 142                                     file->f_flags & O_NONBLOCK);
 143 }
 144
 145 static unsigned int
 146 ts_poll(struct file *file, struct poll_table_struct *wait)
 147 {
 148         struct saa7134_dev *dev = file->private_data;
 149
 150         return videobuf_poll_stream(file, &dev->empress_tsq, wait);
 151 }
 152
 153
 154 static int
 155 ts_mmap(struct file *file, struct vm_area_struct * vma)
 156 {
 157         struct saa7134_dev *dev = file->private_data;
 158
 159         return videobuf_mmap_mapper(&dev->empress_tsq, vma);
 160 }
 161
 162 /*
 163  * This function is _not_ called directly, but from
 164  * video_generic_ioctl (and maybe others).  userspace
 165  * copying is done already, arg is a kernel pointer.
 166  */
 167
 168 static int empress_querycap(struct file *file, void  *priv,
 169                                         struct v4l2_capability *cap)
 170 {
 171         struct saa7134_dev *dev = file->private_data;
 172
 173         strcpy(cap->driver, "saa7134");
 174         strlcpy(cap->card, saa7134_boards[dev->board].name,
 175                 sizeof(cap->card));
 176         sprintf(cap->bus_info, "PCI:%s", pci_name(dev->pci));
 177         cap->version = SAA7134_VERSION_CODE;
 178         cap->capabilities =
 179                 V4L2_CAP_VIDEO_CAPTURE |
 180                 V4L2_CAP_READWRITE |
 181                 V4L2_CAP_STREAMING;
 182         return 0;
 183 }
 184
 185 static int empress_enum_input(struct file *file, void *priv,
 186                                         struct v4l2_input *i)
 187 {
 188         if (i->index != 0)
 189                 return -EINVAL;
 190
 191         i->type = V4L2_INPUT_TYPE_CAMERA;
 192         strcpy(i->name, "CCIR656");
 193
 194         return 0;
 195 }
 196
 197 static int empress_g_input(struct file *file, void *priv, unsigned int *i)
 198 {
 199         *i = 0;
 200         return 0;
 201 }
 202
 203 static int empress_s_input(struct file *file, void *priv, unsigned int i)
 204 {
 205         if (i != 0)
 206                 return -EINVAL;
 207
 208         return 0;
 209 }
 210
 211 static int empress_enum_fmt_vid_cap(struct file *file, void  *priv,
 212                                         struct v4l2_fmtdesc *f)
 213 {
 214         if (f->index != 0)
 215                 return -EINVAL;
 216
 217         strlcpy(f->description, "MPEG TS", sizeof(f->description));
 218         f->pixelformat = V4L2_PIX_FMT_MPEG;
 219
 220         return 0;
 221 }
 222
 223 static int empress_g_fmt_vid_cap(struct file *file, void *priv,
 224                                 struct v4l2_format *f)
 225 {
 226         struct saa7134_dev *dev = file->private_data;
 227
 228         saa_call_all(dev, video, g_fmt, f);
 229
 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
 241         saa_call_all(dev, video, s_fmt, f);
 242
 243         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 244         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 245
 246         return 0;
 247 }
 248
 249 static int empress_try_fmt_vid_cap(struct file *file, void *priv,
 250                                 struct v4l2_format *f)
 251 {
 252         struct saa7134_dev *dev = file->private_data;
 253
 254         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 255         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 256
 257         return 0;
 258 }
 259
 260 static int empress_reqbufs(struct file *file, void *priv,
 261                                         struct v4l2_requestbuffers *p)
 262 {
 263         struct saa7134_dev *dev = file->private_data;
 264
 265         return videobuf_reqbufs(&dev->empress_tsq, p);
 266 }
 267
 268 static int empress_querybuf(struct file *file, void *priv,
 269                                         struct v4l2_buffer *b)
 270 {
 271         struct saa7134_dev *dev = file->private_data;
 272
 273         return videobuf_querybuf(&dev->empress_tsq, b);
 274 }
 275
 276 static int empress_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
 277 {
 278         struct saa7134_dev *dev = file->private_data;
 279
 280         return videobuf_qbuf(&dev->empress_tsq, b);
 281 }
 282
 283 static int empress_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
 284 {
 285         struct saa7134_dev *dev = file->private_data;
 286
 287         return videobuf_dqbuf(&dev->empress_tsq, b,
 288                                 file->f_flags & O_NONBLOCK);
 289 }
 290
 291 static int empress_streamon(struct file *file, void *priv,
 292                                         enum v4l2_buf_type type)
 293 {
 294         struct saa7134_dev *dev = file->private_data;
 295
 296         return videobuf_streamon(&dev->empress_tsq);
 297 }
 298
 299 static int empress_streamoff(struct file *file, void *priv,
 300                                         enum v4l2_buf_type type)
 301 {
 302         struct saa7134_dev *dev = file->private_data;
 303
 304         return videobuf_streamoff(&dev->empress_tsq);
 305 }
 306
 307 static int empress_s_ext_ctrls(struct file *file, void *priv,
 308                                struct v4l2_ext_controls *ctrls)
 309 {
 310         struct saa7134_dev *dev = file->private_data;
 311         int err;
 312
 313         /* count == 0 is abused in saa6752hs.c, so that special
 314                 case is handled here explicitly. */
 315         if (ctrls->count == 0)
 316                 return 0;
 317
 318         if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 319                 return -EINVAL;
 320
 321         err = saa_call_empress(dev, core, s_ext_ctrls, ctrls);
 322         ts_init_encoder(dev);
 323
 324         return err;
 325 }
 326
 327 static int empress_g_ext_ctrls(struct file *file, void *priv,
 328                                struct v4l2_ext_controls *ctrls)
 329 {
 330         struct saa7134_dev *dev = file->private_data;
 331
 332         if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 333                 return -EINVAL;
 334         return saa_call_empress(dev, core, g_ext_ctrls, ctrls);
 335 }
 336
 337 static int empress_g_ctrl(struct file *file, void *priv,
 338                                         struct v4l2_control *c)
 339 {
 340         struct saa7134_dev *dev = file->private_data;
 341
 342         return saa7134_g_ctrl_internal(dev, NULL, c);
 343 }
 344
 345 static int empress_s_ctrl(struct file *file, void *priv,
 346                                         struct v4l2_control *c)
 347 {
 348         struct saa7134_dev *dev = file->private_data;
 349
 350         return saa7134_s_ctrl_internal(dev, NULL, c);
 351 }
 352
 353 static int empress_queryctrl(struct file *file, void *priv,
 354                                         struct v4l2_queryctrl *c)
 355 {
 356         /* Must be sorted from low to high control ID! */
 357         static const u32 user_ctrls[] = {
 358                 V4L2_CID_USER_CLASS,
 359                 V4L2_CID_BRIGHTNESS,
 360                 V4L2_CID_CONTRAST,
 361                 V4L2_CID_SATURATION,
 362                 V4L2_CID_HUE,
 363                 V4L2_CID_AUDIO_VOLUME,
 364                 V4L2_CID_AUDIO_MUTE,
 365                 V4L2_CID_HFLIP,
 366                 0
 367         };
 368
 369         /* Must be sorted from low to high control ID! */
 370         static const u32 mpeg_ctrls[] = {
 371                 V4L2_CID_MPEG_CLASS,
 372                 V4L2_CID_MPEG_STREAM_TYPE,
 373                 V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ,
 374                 V4L2_CID_MPEG_AUDIO_ENCODING,
 375                 V4L2_CID_MPEG_AUDIO_L2_BITRATE,
 376                 V4L2_CID_MPEG_VIDEO_ENCODING,
 377                 V4L2_CID_MPEG_VIDEO_ASPECT,
 378                 V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
 379                 V4L2_CID_MPEG_VIDEO_BITRATE,
 380                 V4L2_CID_MPEG_VIDEO_BITRATE_PEAK,
 381                 0
 382         };
 383         static const u32 *ctrl_classes[] = {
 384                 user_ctrls,
 385                 mpeg_ctrls,
 386                 NULL
 387         };
 388         struct saa7134_dev *dev = file->private_data;
 389
 390         c->id = v4l2_ctrl_next(ctrl_classes, c->id);
 391         if (c->id == 0)
 392                 return -EINVAL;
 393         if (c->id == V4L2_CID_USER_CLASS || c->id == V4L2_CID_MPEG_CLASS)
 394                 return v4l2_ctrl_query_fill(c, 0, 0, 0, 0);
 395         if (V4L2_CTRL_ID2CLASS(c->id) != V4L2_CTRL_CLASS_MPEG)
 396                 return saa7134_queryctrl(file, priv, c);
 397         return saa_call_empress(dev, core, queryctrl, c);
 398 }
 399
 400 static int empress_querymenu(struct file *file, void *priv,
 401                                         struct v4l2_querymenu *c)
 402 {
 403         struct saa7134_dev *dev = file->private_data;
 404
 405         if (V4L2_CTRL_ID2CLASS(c->id) != V4L2_CTRL_CLASS_MPEG)
 406                 return -EINVAL;
 407         return saa_call_empress(dev, core, querymenu, c);
 408 }
 409
 410 static int empress_g_chip_ident(struct file *file, void *fh,
 411                struct v4l2_dbg_chip_ident *chip)
 412 {
 413         struct saa7134_dev *dev = file->private_data;
 414
 415         chip->ident = V4L2_IDENT_NONE;
 416         chip->revision = 0;
 417         if (chip->match.type == V4L2_CHIP_MATCH_I2C_DRIVER &&
 418             !strcmp(chip->match.name, "saa6752hs"))
 419                 return saa_call_empress(dev, core, g_chip_ident, chip);
 420         if (chip->match.type == V4L2_CHIP_MATCH_I2C_ADDR)
 421                 return saa_call_empress(dev, core, 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_try_fmt_vid_cap         = empress_try_fmt_vid_cap,
 455         .vidioc_s_fmt_vid_cap           = empress_s_fmt_vid_cap,
 456         .vidioc_g_fmt_vid_cap           = empress_g_fmt_vid_cap,
 457         .vidioc_reqbufs                 = empress_reqbufs,
 458         .vidioc_querybuf                = empress_querybuf,
 459         .vidioc_qbuf                    = empress_qbuf,
 460         .vidioc_dqbuf                   = empress_dqbuf,
 461         .vidioc_streamon                = empress_streamon,
 462         .vidioc_streamoff               = empress_streamoff,
 463         .vidioc_s_ext_ctrls             = empress_s_ext_ctrls,
 464         .vidioc_g_ext_ctrls             = empress_g_ext_ctrls,
 465         .vidioc_enum_input              = empress_enum_input,
 466         .vidioc_g_input                 = empress_g_input,
 467         .vidioc_s_input                 = empress_s_input,
 468         .vidioc_queryctrl               = empress_queryctrl,
 469         .vidioc_querymenu               = empress_querymenu,
 470         .vidioc_g_ctrl                  = empress_g_ctrl,
 471         .vidioc_s_ctrl                  = empress_s_ctrl,
 472         .vidioc_g_chip_ident            = empress_g_chip_ident,
 473         .vidioc_s_std                   = empress_s_std,
 474         .vidioc_g_std                   = empress_g_std,
 475 };
 476
 477 /* ----------------------------------------------------------- */
 478
 479 static struct video_device saa7134_empress_template = {
 480         .name          = "saa7134-empress",
 481         .fops          = &ts_fops,
 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         } else {
 496                 dprintk("video signal acquired\n");
 497         }
 498 }
 499
 500 static void empress_signal_change(struct saa7134_dev *dev)
 501 {
 502         schedule_work(&dev->empress_workqueue);
 503 }
 504
 505
 506 static int empress_init(struct saa7134_dev *dev)
 507 {
 508         int err;
 509
 510         dprintk("%s: %s\n",dev->name,__func__);
 511         dev->empress_dev = video_device_alloc();
 512         if (NULL == dev->empress_dev)
 513                 return -ENOMEM;
 514         *(dev->empress_dev) = saa7134_empress_template;
 515         dev->empress_dev->parent  = &dev->pci->dev;
 516         dev->empress_dev->release = video_device_release;
 517         snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
 518                  "%s empress (%s)", dev->name,
 519                  saa7134_boards[dev->board].name);
 520
 521         INIT_WORK(&dev->empress_workqueue, empress_signal_update);
 522
 523         video_set_drvdata(dev->empress_dev, dev);
 524         err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
 525                                     empress_nr[dev->nr]);
 526         if (err < 0) {
 527                 printk(KERN_INFO "%s: can't register video device\n",
 528                        dev->name);
 529                 video_device_release(dev->empress_dev);
 530                 dev->empress_dev = NULL;
 531                 return err;
 532         }
 533         printk(KERN_INFO "%s: registered device %s [mpeg]\n",
 534                dev->name, video_device_node_name(dev->empress_dev));
 535
 536         videobuf_queue_sg_init(&dev->empress_tsq, &saa7134_ts_qops,
 537                             &dev->pci->dev, &dev->slock,
 538                             V4L2_BUF_TYPE_VIDEO_CAPTURE,
 539                             V4L2_FIELD_ALTERNATE,
 540                             sizeof(struct saa7134_buf),
 541                             dev);
 542
 543         empress_signal_update(&dev->empress_workqueue);
 544         return 0;
 545 }
 546
 547 static int empress_fini(struct saa7134_dev *dev)
 548 {
 549         dprintk("%s: %s\n",dev->name,__func__);
 550
 551         if (NULL == dev->empress_dev)
 552                 return 0;
 553         flush_scheduled_work();
 554         video_unregister_device(dev->empress_dev);
 555         dev->empress_dev = NULL;
 556         return 0;
 557 }
 558
 559 static struct saa7134_mpeg_ops empress_ops = {
 560         .type          = SAA7134_MPEG_EMPRESS,
 561         .init          = empress_init,
 562         .fini          = empress_fini,
 563         .signal_change = empress_signal_change,
 564 };
 565
 566 static int __init empress_register(void)
 567 {
 568         return saa7134_ts_register(&empress_ops);
 569 }
 570
 571 static void __exit empress_unregister(void)
 572 {
 573         saa7134_ts_unregister(&empress_ops);
 574 }
 575
 576 module_init(empress_register);
 577 module_exit(empress_unregister);
 578
 579 /* ----------------------------------------------------------- */
 580 /*
 581  * Local variables:
 582  * c-basic-offset: 8
 583  * End:
 584  */