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                 goto done;
  97         if (atomic_read(&dev->empress_users))
  98                 goto done_up;
  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_up:
 109         mutex_unlock(&dev->empress_tsq.vb_lock);
 110 done:
 111         unlock_kernel();
 112         return err;
 113 }
 114
 115 static int ts_release(struct file *file)
 116 {
 117         struct saa7134_dev *dev = file->private_data;
 118
 119         videobuf_stop(&dev->empress_tsq);
 120         videobuf_mmap_free(&dev->empress_tsq);
 121
 122         /* stop the encoder */
 123         ts_reset_encoder(dev);
 124
 125         /* Mute audio */
 126         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
 127                 saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6));
 128
 129         atomic_dec(&dev->empress_users);
 130
 131         return 0;
 132 }
 133
 134 static ssize_t
 135 ts_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
 136 {
 137         struct saa7134_dev *dev = file->private_data;
 138
 139         if (!dev->empress_started)
 140                 ts_init_encoder(dev);
 141
 142         return videobuf_read_stream(&dev->empress_tsq,
 143                                     data, count, ppos, 0,
 144                                     file->f_flags & O_NONBLOCK);
 145 }
 146
 147 static unsigned int
 148 ts_poll(struct file *file, struct poll_table_struct *wait)
 149 {
 150         struct saa7134_dev *dev = file->private_data;
 151
 152         return videobuf_poll_stream(file, &dev->empress_tsq, wait);
 153 }
 154
 155
 156 static int
 157 ts_mmap(struct file *file, struct vm_area_struct * vma)
 158 {
 159         struct saa7134_dev *dev = file->private_data;
 160
 161         return videobuf_mmap_mapper(&dev->empress_tsq, vma);
 162 }
 163
 164 /*
 165  * This function is _not_ called directly, but from
 166  * video_generic_ioctl (and maybe others).  userspace
 167  * copying is done already, arg is a kernel pointer.
 168  */
 169
 170 static int empress_querycap(struct file *file, void  *priv,
 171                                         struct v4l2_capability *cap)
 172 {
 173         struct saa7134_dev *dev = file->private_data;
 174
 175         strcpy(cap->driver, "saa7134");
 176         strlcpy(cap->card, saa7134_boards[dev->board].name,
 177                 sizeof(cap->card));
 178         sprintf(cap->bus_info, "PCI:%s", pci_name(dev->pci));
 179         cap->version = SAA7134_VERSION_CODE;
 180         cap->capabilities =
 181                 V4L2_CAP_VIDEO_CAPTURE |
 182                 V4L2_CAP_READWRITE |
 183                 V4L2_CAP_STREAMING;
 184         return 0;
 185 }
 186
 187 static int empress_enum_input(struct file *file, void *priv,
 188                                         struct v4l2_input *i)
 189 {
 190         if (i->index != 0)
 191                 return -EINVAL;
 192
 193         i->type = V4L2_INPUT_TYPE_CAMERA;
 194         strcpy(i->name, "CCIR656");
 195
 196         return 0;
 197 }
 198
 199 static int empress_g_input(struct file *file, void *priv, unsigned int *i)
 200 {
 201         *i = 0;
 202         return 0;
 203 }
 204
 205 static int empress_s_input(struct file *file, void *priv, unsigned int i)
 206 {
 207         if (i != 0)
 208                 return -EINVAL;
 209
 210         return 0;
 211 }
 212
 213 static int empress_enum_fmt_vid_cap(struct file *file, void  *priv,
 214                                         struct v4l2_fmtdesc *f)
 215 {
 216         if (f->index != 0)
 217                 return -EINVAL;
 218
 219         strlcpy(f->description, "MPEG TS", sizeof(f->description));
 220         f->pixelformat = V4L2_PIX_FMT_MPEG;
 221
 222         return 0;
 223 }
 224
 225 static int empress_g_fmt_vid_cap(struct file *file, void *priv,
 226                                 struct v4l2_format *f)
 227 {
 228         struct saa7134_dev *dev = file->private_data;
 229
 230         saa_call_all(dev, video, g_fmt, f);
 231
 232         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 233         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 234
 235         return 0;
 236 }
 237
 238 static int empress_s_fmt_vid_cap(struct file *file, void *priv,
 239                                 struct v4l2_format *f)
 240 {
 241         struct saa7134_dev *dev = file->private_data;
 242
 243         saa_call_all(dev, video, s_fmt, f);
 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_AUDIO_SAMPLING_FREQ,
 376                 V4L2_CID_MPEG_AUDIO_ENCODING,
 377                 V4L2_CID_MPEG_AUDIO_L2_BITRATE,
 378                 V4L2_CID_MPEG_VIDEO_ENCODING,
 379                 V4L2_CID_MPEG_VIDEO_ASPECT,
 380                 V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
 381                 V4L2_CID_MPEG_VIDEO_BITRATE,
 382                 V4L2_CID_MPEG_VIDEO_BITRATE_PEAK,
 383                 0
 384         };
 385         static const u32 *ctrl_classes[] = {
 386                 user_ctrls,
 387                 mpeg_ctrls,
 388                 NULL
 389         };
 390         struct saa7134_dev *dev = file->private_data;
 391
 392         c->id = v4l2_ctrl_next(ctrl_classes, c->id);
 393         if (c->id == 0)
 394                 return -EINVAL;
 395         if (c->id == V4L2_CID_USER_CLASS || c->id == V4L2_CID_MPEG_CLASS)
 396                 return v4l2_ctrl_query_fill(c, 0, 0, 0, 0);
 397         if (V4L2_CTRL_ID2CLASS(c->id) != V4L2_CTRL_CLASS_MPEG)
 398                 return saa7134_queryctrl(file, priv, c);
 399         return saa_call_empress(dev, core, queryctrl, c);
 400 }
 401
 402 static int empress_querymenu(struct file *file, void *priv,
 403                                         struct v4l2_querymenu *c)
 404 {
 405         struct saa7134_dev *dev = file->private_data;
 406
 407         if (V4L2_CTRL_ID2CLASS(c->id) != V4L2_CTRL_CLASS_MPEG)
 408                 return -EINVAL;
 409         return saa_call_empress(dev, core, querymenu, c);
 410 }
 411
 412 static int empress_g_chip_ident(struct file *file, void *fh,
 413                struct v4l2_dbg_chip_ident *chip)
 414 {
 415         struct saa7134_dev *dev = file->private_data;
 416
 417         chip->ident = V4L2_IDENT_NONE;
 418         chip->revision = 0;
 419         if (chip->match.type == V4L2_CHIP_MATCH_I2C_DRIVER &&
 420             !strcmp(chip->match.name, "saa6752hs"))
 421                 return saa_call_empress(dev, core, g_chip_ident, chip);
 422         if (chip->match.type == V4L2_CHIP_MATCH_I2C_ADDR)
 423                 return saa_call_empress(dev, core, g_chip_ident, chip);
 424         return -EINVAL;
 425 }
 426
 427 static int empress_s_std(struct file *file, void *priv, v4l2_std_id *id)
 428 {
 429         struct saa7134_dev *dev = file->private_data;
 430
 431         return saa7134_s_std_internal(dev, NULL, id);
 432 }
 433
 434 static int empress_g_std(struct file *file, void *priv, v4l2_std_id *id)
 435 {
 436         struct saa7134_dev *dev = file->private_data;
 437
 438         *id = dev->tvnorm->id;
 439         return 0;
 440 }
 441
 442 static const struct v4l2_file_operations ts_fops =
 443 {
 444         .owner    = THIS_MODULE,
 445         .open     = ts_open,
 446         .release  = ts_release,
 447         .read     = ts_read,
 448         .poll     = ts_poll,
 449         .mmap     = ts_mmap,
 450         .ioctl    = video_ioctl2,
 451 };
 452
 453 static const struct v4l2_ioctl_ops ts_ioctl_ops = {
 454         .vidioc_querycap                = empress_querycap,
 455         .vidioc_enum_fmt_vid_cap        = empress_enum_fmt_vid_cap,
 456         .vidioc_try_fmt_vid_cap         = empress_try_fmt_vid_cap,
 457         .vidioc_s_fmt_vid_cap           = empress_s_fmt_vid_cap,
 458         .vidioc_g_fmt_vid_cap           = empress_g_fmt_vid_cap,
 459         .vidioc_reqbufs                 = empress_reqbufs,
 460         .vidioc_querybuf                = empress_querybuf,
 461         .vidioc_qbuf                    = empress_qbuf,
 462         .vidioc_dqbuf                   = empress_dqbuf,
 463         .vidioc_streamon                = empress_streamon,
 464         .vidioc_streamoff               = empress_streamoff,
 465         .vidioc_s_ext_ctrls             = empress_s_ext_ctrls,
 466         .vidioc_g_ext_ctrls             = empress_g_ext_ctrls,
 467         .vidioc_enum_input              = empress_enum_input,
 468         .vidioc_g_input                 = empress_g_input,
 469         .vidioc_s_input                 = empress_s_input,
 470         .vidioc_queryctrl               = empress_queryctrl,
 471         .vidioc_querymenu               = empress_querymenu,
 472         .vidioc_g_ctrl                  = empress_g_ctrl,
 473         .vidioc_s_ctrl                  = empress_s_ctrl,
 474         .vidioc_g_chip_ident            = empress_g_chip_ident,
 475         .vidioc_s_std                   = empress_s_std,
 476         .vidioc_g_std                   = empress_g_std,
 477 };
 478
 479 /* ----------------------------------------------------------- */
 480
 481 static struct video_device saa7134_empress_template = {
 482         .name          = "saa7134-empress",
 483         .fops          = &ts_fops,
 484         .ioctl_ops     = &ts_ioctl_ops,
 485
 486         .tvnorms                        = SAA7134_NORMS,
 487         .current_norm                   = V4L2_STD_PAL,
 488 };
 489
 490 static void empress_signal_update(struct work_struct *work)
 491 {
 492         struct saa7134_dev* dev =
 493                 container_of(work, struct saa7134_dev, empress_workqueue);
 494
 495         if (dev->nosignal) {
 496                 dprintk("no video signal\n");
 497         } else {
 498                 dprintk("video signal acquired\n");
 499         }
 500 }
 501
 502 static void empress_signal_change(struct saa7134_dev *dev)
 503 {
 504         schedule_work(&dev->empress_workqueue);
 505 }
 506
 507
 508 static int empress_init(struct saa7134_dev *dev)
 509 {
 510         int err;
 511
 512         dprintk("%s: %s\n",dev->name,__func__);
 513         dev->empress_dev = video_device_alloc();
 514         if (NULL == dev->empress_dev)
 515                 return -ENOMEM;
 516         *(dev->empress_dev) = saa7134_empress_template;
 517         dev->empress_dev->parent  = &dev->pci->dev;
 518         dev->empress_dev->release = video_device_release;
 519         snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
 520                  "%s empress (%s)", dev->name,
 521                  saa7134_boards[dev->board].name);
 522
 523         INIT_WORK(&dev->empress_workqueue, empress_signal_update);
 524
 525         video_set_drvdata(dev->empress_dev, dev);
 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 %s [mpeg]\n",
 536                dev->name, video_device_node_name(dev->empress_dev));
 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  */