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/delay.h>
  26
  27 #include "saa7134-reg.h"
  28 #include "saa7134.h"
  29
  30 #include <media/saa6752hs.h>
  31 #include <media/v4l2-common.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         struct v4l2_ext_controls ctrls = { V4L2_CTRL_CLASS_MPEG, 0 };
  67
  68         ts_reset_encoder(dev);
  69         saa7134_i2c_call_clients(dev, VIDIOC_S_EXT_CTRLS, &ctrls);
  70         dev->empress_started = 1;
  71         return 0;
  72 }
  73
  74 /* ------------------------------------------------------------------ */
  75
  76 static int ts_open(struct inode *inode, struct file *file)
  77 {
  78         int minor = iminor(inode);
  79         struct saa7134_dev *dev;
  80         int err;
  81
  82         list_for_each_entry(dev, &saa7134_devlist, devlist)
  83                 if (dev->empress_dev && dev->empress_dev->minor == minor)
  84                         goto found;
  85         return -ENODEV;
  86  found:
  87
  88         dprintk("open minor=%d\n",minor);
  89         err = -EBUSY;
  90         if (!mutex_trylock(&dev->empress_tsq.vb_lock))
  91                 goto done;
  92         if (atomic_read(&dev->empress_users))
  93                 goto done_up;
  94
  95         /* Unmute audio */
  96         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
  97                 saa_readb(SAA7134_AUDIO_MUTE_CTRL) & ~(1 << 6));
  98
  99         atomic_inc(&dev->empress_users);
 100         file->private_data = dev;
 101         err = 0;
 102
 103 done_up:
 104         mutex_unlock(&dev->empress_tsq.vb_lock);
 105 done:
 106         return err;
 107 }
 108
 109 static int ts_release(struct inode *inode, struct file *file)
 110 {
 111         struct saa7134_dev *dev = file->private_data;
 112
 113         videobuf_stop(&dev->empress_tsq);
 114         videobuf_mmap_free(&dev->empress_tsq);
 115
 116         /* stop the encoder */
 117         ts_reset_encoder(dev);
 118
 119         /* Mute audio */
 120         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
 121                 saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6));
 122
 123         atomic_dec(&dev->empress_users);
 124
 125         return 0;
 126 }
 127
 128 static ssize_t
 129 ts_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
 130 {
 131         struct saa7134_dev *dev = file->private_data;
 132
 133         if (!dev->empress_started)
 134                 ts_init_encoder(dev);
 135
 136         return videobuf_read_stream(&dev->empress_tsq,
 137                                     data, count, ppos, 0,
 138                                     file->f_flags & O_NONBLOCK);
 139 }
 140
 141 static unsigned int
 142 ts_poll(struct file *file, struct poll_table_struct *wait)
 143 {
 144         struct saa7134_dev *dev = file->private_data;
 145
 146         return videobuf_poll_stream(file, &dev->empress_tsq, wait);
 147 }
 148
 149
 150 static int
 151 ts_mmap(struct file *file, struct vm_area_struct * vma)
 152 {
 153         struct saa7134_dev *dev = file->private_data;
 154
 155         return videobuf_mmap_mapper(&dev->empress_tsq, vma);
 156 }
 157
 158 /*
 159  * This function is _not_ called directly, but from
 160  * video_generic_ioctl (and maybe others).  userspace
 161  * copying is done already, arg is a kernel pointer.
 162  */
 163
 164 static int empress_querycap(struct file *file, void  *priv,
 165                                         struct v4l2_capability *cap)
 166 {
 167         struct saa7134_dev *dev = file->private_data;
 168
 169         strcpy(cap->driver, "saa7134");
 170         strlcpy(cap->card, saa7134_boards[dev->board].name,
 171                 sizeof(cap->card));
 172         sprintf(cap->bus_info, "PCI:%s", pci_name(dev->pci));
 173         cap->version = SAA7134_VERSION_CODE;
 174         cap->capabilities =
 175                 V4L2_CAP_VIDEO_CAPTURE |
 176                 V4L2_CAP_READWRITE |
 177                 V4L2_CAP_STREAMING;
 178         return 0;
 179 }
 180
 181 static int empress_enum_input(struct file *file, void *priv,
 182                                         struct v4l2_input *i)
 183 {
 184         if (i->index != 0)
 185                 return -EINVAL;
 186
 187         i->type = V4L2_INPUT_TYPE_CAMERA;
 188         strcpy(i->name, "CCIR656");
 189
 190         return 0;
 191 }
 192
 193 static int empress_g_input(struct file *file, void *priv, unsigned int *i)
 194 {
 195         *i = 0;
 196         return 0;
 197 }
 198
 199 static int empress_s_input(struct file *file, void *priv, unsigned int i)
 200 {
 201         if (i != 0)
 202                 return -EINVAL;
 203
 204         return 0;
 205 }
 206
 207 static int empress_enum_fmt_vid_cap(struct file *file, void  *priv,
 208                                         struct v4l2_fmtdesc *f)
 209 {
 210         if (f->index != 0)
 211                 return -EINVAL;
 212
 213         strlcpy(f->description, "MPEG TS", sizeof(f->description));
 214         f->pixelformat = V4L2_PIX_FMT_MPEG;
 215
 216         return 0;
 217 }
 218
 219 static int empress_g_fmt_vid_cap(struct file *file, void *priv,
 220                                 struct v4l2_format *f)
 221 {
 222         struct saa7134_dev *dev = file->private_data;
 223
 224         saa7134_i2c_call_clients(dev, VIDIOC_G_FMT, f);
 225
 226         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 227         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 228
 229         return 0;
 230 }
 231
 232 static int empress_s_fmt_vid_cap(struct file *file, void *priv,
 233                                 struct v4l2_format *f)
 234 {
 235         struct saa7134_dev *dev = file->private_data;
 236
 237         saa7134_i2c_call_clients(dev, VIDIOC_S_FMT, f);
 238
 239         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 240         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 241
 242         return 0;
 243 }
 244
 245
 246 static int empress_reqbufs(struct file *file, void *priv,
 247                                         struct v4l2_requestbuffers *p)
 248 {
 249         struct saa7134_dev *dev = file->private_data;
 250
 251         return videobuf_reqbufs(&dev->empress_tsq, p);
 252 }
 253
 254 static int empress_querybuf(struct file *file, void *priv,
 255                                         struct v4l2_buffer *b)
 256 {
 257         struct saa7134_dev *dev = file->private_data;
 258
 259         return videobuf_querybuf(&dev->empress_tsq, b);
 260 }
 261
 262 static int empress_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
 263 {
 264         struct saa7134_dev *dev = file->private_data;
 265
 266         return videobuf_qbuf(&dev->empress_tsq, b);
 267 }
 268
 269 static int empress_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
 270 {
 271         struct saa7134_dev *dev = file->private_data;
 272
 273         return videobuf_dqbuf(&dev->empress_tsq, b,
 274                                 file->f_flags & O_NONBLOCK);
 275 }
 276
 277 static int empress_streamon(struct file *file, void *priv,
 278                                         enum v4l2_buf_type type)
 279 {
 280         struct saa7134_dev *dev = file->private_data;
 281
 282         return videobuf_streamon(&dev->empress_tsq);
 283 }
 284
 285 static int empress_streamoff(struct file *file, void *priv,
 286                                         enum v4l2_buf_type type)
 287 {
 288         struct saa7134_dev *dev = file->private_data;
 289
 290         return videobuf_streamoff(&dev->empress_tsq);
 291 }
 292
 293 static int saa7134_i2c_call_saa6752(struct saa7134_dev *dev,
 294                                               unsigned int cmd, void *arg)
 295 {
 296         if (dev->mpeg_i2c_client == NULL)
 297                 return -EINVAL;
 298         return dev->mpeg_i2c_client->driver->command(dev->mpeg_i2c_client,
 299                                                                 cmd, arg);
 300 }
 301
 302 static int empress_s_ext_ctrls(struct file *file, void *priv,
 303                                struct v4l2_ext_controls *ctrls)
 304 {
 305         struct saa7134_dev *dev = file->private_data;
 306         int err;
 307
 308         /* count == 0 is abused in saa6752hs.c, so that special
 309                 case is handled here explicitly. */
 310         if (ctrls->count == 0)
 311                 return 0;
 312
 313         if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 314                 return -EINVAL;
 315
 316         err = saa7134_i2c_call_saa6752(dev, VIDIOC_S_EXT_CTRLS, ctrls);
 317         ts_init_encoder(dev);
 318
 319         return err;
 320 }
 321
 322 static int empress_g_ext_ctrls(struct file *file, void *priv,
 323                                struct v4l2_ext_controls *ctrls)
 324 {
 325         struct saa7134_dev *dev = file->private_data;
 326
 327         if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 328                 return -EINVAL;
 329         return saa7134_i2c_call_saa6752(dev, VIDIOC_G_EXT_CTRLS, ctrls);
 330 }
 331
 332 static int empress_g_ctrl(struct file *file, void *priv,
 333                                         struct v4l2_control *c)
 334 {
 335         struct saa7134_dev *dev = file->private_data;
 336
 337         return saa7134_g_ctrl_internal(dev, NULL, c);
 338 }
 339
 340 static int empress_s_ctrl(struct file *file, void *priv,
 341                                         struct v4l2_control *c)
 342 {
 343         struct saa7134_dev *dev = file->private_data;
 344
 345         return saa7134_s_ctrl_internal(dev, NULL, c);
 346 }
 347
 348 static int empress_queryctrl(struct file *file, void *priv,
 349                                         struct v4l2_queryctrl *c)
 350 {
 351         static const u32 user_ctrls[] = {
 352                 V4L2_CID_USER_CLASS,
 353                 V4L2_CID_BRIGHTNESS,
 354                 V4L2_CID_CONTRAST,
 355                 V4L2_CID_SATURATION,
 356                 V4L2_CID_HUE,
 357                 V4L2_CID_AUDIO_VOLUME,
 358                 V4L2_CID_AUDIO_MUTE,
 359                 V4L2_CID_HFLIP,
 360                 0
 361         };
 362
 363         static const u32 mpeg_ctrls[] = {
 364                 V4L2_CID_MPEG_CLASS,
 365                 V4L2_CID_MPEG_STREAM_TYPE,
 366                 V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ,
 367                 V4L2_CID_MPEG_AUDIO_ENCODING,
 368                 V4L2_CID_MPEG_AUDIO_L2_BITRATE,
 369                 V4L2_CID_MPEG_VIDEO_ENCODING,
 370                 V4L2_CID_MPEG_VIDEO_ASPECT,
 371                 V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
 372                 V4L2_CID_MPEG_VIDEO_BITRATE,
 373                 V4L2_CID_MPEG_VIDEO_BITRATE_PEAK,
 374                 0
 375         };
 376         static const u32 *ctrl_classes[] = {
 377                 user_ctrls,
 378                 mpeg_ctrls,
 379                 NULL
 380         };
 381         struct saa7134_dev *dev = file->private_data;
 382
 383         c->id = v4l2_ctrl_next(ctrl_classes, c->id);
 384         if (c->id == 0)
 385                 return -EINVAL;
 386         if (c->id == V4L2_CID_USER_CLASS || c->id == V4L2_CID_MPEG_CLASS)
 387                 return v4l2_ctrl_query_fill_std(c);
 388         if (V4L2_CTRL_ID2CLASS(c->id) != V4L2_CTRL_CLASS_MPEG)
 389                 return saa7134_queryctrl(file, priv, c);
 390         return saa7134_i2c_call_saa6752(dev, VIDIOC_QUERYCTRL, c);
 391 }
 392
 393 static int empress_querymenu(struct file *file, void *priv,
 394                                         struct v4l2_querymenu *c)
 395 {
 396         struct saa7134_dev *dev = file->private_data;
 397
 398         if (V4L2_CTRL_ID2CLASS(c->id) != V4L2_CTRL_CLASS_MPEG)
 399                 return -EINVAL;
 400         return saa7134_i2c_call_saa6752(dev, VIDIOC_QUERYMENU, c);
 401 }
 402
 403 static const struct file_operations ts_fops =
 404 {
 405         .owner    = THIS_MODULE,
 406         .open     = ts_open,
 407         .release  = ts_release,
 408         .read     = ts_read,
 409         .poll     = ts_poll,
 410         .mmap     = ts_mmap,
 411         .ioctl    = video_ioctl2,
 412         .llseek   = no_llseek,
 413 };
 414
 415 static const struct v4l2_ioctl_ops ts_ioctl_ops = {
 416         .vidioc_querycap                = empress_querycap,
 417         .vidioc_enum_fmt_vid_cap        = empress_enum_fmt_vid_cap,
 418         .vidioc_s_fmt_vid_cap           = empress_s_fmt_vid_cap,
 419         .vidioc_g_fmt_vid_cap           = empress_g_fmt_vid_cap,
 420         .vidioc_reqbufs                 = empress_reqbufs,
 421         .vidioc_querybuf                = empress_querybuf,
 422         .vidioc_qbuf                    = empress_qbuf,
 423         .vidioc_dqbuf                   = empress_dqbuf,
 424         .vidioc_streamon                = empress_streamon,
 425         .vidioc_streamoff               = empress_streamoff,
 426         .vidioc_s_ext_ctrls             = empress_s_ext_ctrls,
 427         .vidioc_g_ext_ctrls             = empress_g_ext_ctrls,
 428         .vidioc_enum_input              = empress_enum_input,
 429         .vidioc_g_input                 = empress_g_input,
 430         .vidioc_s_input                 = empress_s_input,
 431
 432         .vidioc_queryctrl               = empress_queryctrl,
 433         .vidioc_querymenu               = empress_querymenu,
 434         .vidioc_g_ctrl                  = empress_g_ctrl,
 435         .vidioc_s_ctrl                  = empress_s_ctrl,
 436 };
 437
 438 /* ----------------------------------------------------------- */
 439
 440 static struct video_device saa7134_empress_template = {
 441         .name          = "saa7134-empress",
 442         .fops          = &ts_fops,
 443         .minor         = -1,
 444         .ioctl_ops     = &ts_ioctl_ops,
 445
 446         .tvnorms                        = SAA7134_NORMS,
 447         .current_norm                   = V4L2_STD_PAL,
 448 };
 449
 450 static void empress_signal_update(struct work_struct *work)
 451 {
 452         struct saa7134_dev* dev =
 453                 container_of(work, struct saa7134_dev, empress_workqueue);
 454
 455         if (dev->nosignal) {
 456                 dprintk("no video signal\n");
 457                 ts_reset_encoder(dev);
 458         } else {
 459                 dprintk("video signal acquired\n");
 460                 if (atomic_read(&dev->empress_users))
 461                         ts_init_encoder(dev);
 462         }
 463 }
 464
 465 static void empress_signal_change(struct saa7134_dev *dev)
 466 {
 467         schedule_work(&dev->empress_workqueue);
 468 }
 469
 470
 471 static int empress_init(struct saa7134_dev *dev)
 472 {
 473         int err;
 474
 475         dprintk("%s: %s\n",dev->name,__func__);
 476         dev->empress_dev = video_device_alloc();
 477         if (NULL == dev->empress_dev)
 478                 return -ENOMEM;
 479         *(dev->empress_dev) = saa7134_empress_template;
 480         dev->empress_dev->parent  = &dev->pci->dev;
 481         dev->empress_dev->release = video_device_release;
 482         snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
 483                  "%s empress (%s)", dev->name,
 484                  saa7134_boards[dev->board].name);
 485
 486         INIT_WORK(&dev->empress_workqueue, empress_signal_update);
 487
 488         err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
 489                                     empress_nr[dev->nr]);
 490         if (err < 0) {
 491                 printk(KERN_INFO "%s: can't register video device\n",
 492                        dev->name);
 493                 video_device_release(dev->empress_dev);
 494                 dev->empress_dev = NULL;
 495                 return err;
 496         }
 497         printk(KERN_INFO "%s: registered device video%d [mpeg]\n",
 498                dev->name,dev->empress_dev->minor & 0x1f);
 499
 500         videobuf_queue_sg_init(&dev->empress_tsq, &saa7134_ts_qops,
 501                             &dev->pci->dev, &dev->slock,
 502                             V4L2_BUF_TYPE_VIDEO_CAPTURE,
 503                             V4L2_FIELD_ALTERNATE,
 504                             sizeof(struct saa7134_buf),
 505                             dev);
 506
 507         empress_signal_update(&dev->empress_workqueue);
 508         return 0;
 509 }
 510
 511 static int empress_fini(struct saa7134_dev *dev)
 512 {
 513         dprintk("%s: %s\n",dev->name,__func__);
 514
 515         if (NULL == dev->empress_dev)
 516                 return 0;
 517         flush_scheduled_work();
 518         video_unregister_device(dev->empress_dev);
 519         dev->empress_dev = NULL;
 520         return 0;
 521 }
 522
 523 static struct saa7134_mpeg_ops empress_ops = {
 524         .type          = SAA7134_MPEG_EMPRESS,
 525         .init          = empress_init,
 526         .fini          = empress_fini,
 527         .signal_change = empress_signal_change,
 528 };
 529
 530 static int __init empress_register(void)
 531 {
 532         return saa7134_ts_register(&empress_ops);
 533 }
 534
 535 static void __exit empress_unregister(void)
 536 {
 537         saa7134_ts_unregister(&empress_ops);
 538 }
 539
 540 module_init(empress_register);
 541 module_exit(empress_unregister);
 542
 543 /* ----------------------------------------------------------- */
 544 /*
 545  * Local variables:
 546  * c-basic-offset: 8
 547  * End:
 548  */