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 #include <media/v4l2-chip-ident.h>
  33
  34 /* ------------------------------------------------------------------ */
  35
  36 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
  37 MODULE_LICENSE("GPL");
  38
  39 static unsigned int empress_nr[] = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET };
  40
  41 module_param_array(empress_nr, int, NULL, 0444);
  42 MODULE_PARM_DESC(empress_nr,"ts device number");
  43
  44 static unsigned int debug;
  45 module_param(debug, int, 0644);
  46 MODULE_PARM_DESC(debug,"enable debug messages");
  47
  48 #define dprintk(fmt, arg...)    if (debug)                      \
  49         printk(KERN_DEBUG "%s/empress: " fmt, dev->name , ## arg)
  50
  51 /* ------------------------------------------------------------------ */
  52
  53 static void ts_reset_encoder(struct saa7134_dev* dev)
  54 {
  55         if (!dev->empress_started)
  56                 return;
  57
  58         saa_writeb(SAA7134_SPECIAL_MODE, 0x00);
  59         msleep(10);
  60         saa_writeb(SAA7134_SPECIAL_MODE, 0x01);
  61         msleep(100);
  62         dev->empress_started = 0;
  63 }
  64
  65 static int ts_init_encoder(struct saa7134_dev* dev)
  66 {
  67         struct v4l2_ext_controls ctrls = { V4L2_CTRL_CLASS_MPEG, 0 };
  68
  69         ts_reset_encoder(dev);
  70         saa7134_i2c_call_clients(dev, VIDIOC_S_EXT_CTRLS, &ctrls);
  71         dev->empress_started = 1;
  72         return 0;
  73 }
  74
  75 /* ------------------------------------------------------------------ */
  76
  77 static int ts_open(struct inode *inode, struct file *file)
  78 {
  79         int minor = iminor(inode);
  80         struct saa7134_dev *dev;
  81         int err;
  82
  83         lock_kernel();
  84         list_for_each_entry(dev, &saa7134_devlist, devlist)
  85                 if (dev->empress_dev && dev->empress_dev->minor == minor)
  86                         goto found;
  87         unlock_kernel();
  88         return -ENODEV;
  89  found:
  90
  91         dprintk("open minor=%d\n",minor);
  92         err = -EBUSY;
  93         if (!mutex_trylock(&dev->empress_tsq.vb_lock))
  94                 goto done;
  95         if (atomic_read(&dev->empress_users))
  96                 goto done_up;
  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_up:
 107         mutex_unlock(&dev->empress_tsq.vb_lock);
 108 done:
 109         unlock_kernel();
 110         return err;
 111 }
 112
 113 static int ts_release(struct inode *inode, 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         saa7134_i2c_call_clients(dev, VIDIOC_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         saa7134_i2c_call_clients(dev, VIDIOC_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
 250 static int empress_reqbufs(struct file *file, void *priv,
 251                                         struct v4l2_requestbuffers *p)
 252 {
 253         struct saa7134_dev *dev = file->private_data;
 254
 255         return videobuf_reqbufs(&dev->empress_tsq, p);
 256 }
 257
 258 static int empress_querybuf(struct file *file, void *priv,
 259                                         struct v4l2_buffer *b)
 260 {
 261         struct saa7134_dev *dev = file->private_data;
 262
 263         return videobuf_querybuf(&dev->empress_tsq, b);
 264 }
 265
 266 static int empress_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
 267 {
 268         struct saa7134_dev *dev = file->private_data;
 269
 270         return videobuf_qbuf(&dev->empress_tsq, b);
 271 }
 272
 273 static int empress_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
 274 {
 275         struct saa7134_dev *dev = file->private_data;
 276
 277         return videobuf_dqbuf(&dev->empress_tsq, b,
 278                                 file->f_flags & O_NONBLOCK);
 279 }
 280
 281 static int empress_streamon(struct file *file, void *priv,
 282                                         enum v4l2_buf_type type)
 283 {
 284         struct saa7134_dev *dev = file->private_data;
 285
 286         return videobuf_streamon(&dev->empress_tsq);
 287 }
 288
 289 static int empress_streamoff(struct file *file, void *priv,
 290                                         enum v4l2_buf_type type)
 291 {
 292         struct saa7134_dev *dev = file->private_data;
 293
 294         return videobuf_streamoff(&dev->empress_tsq);
 295 }
 296
 297 static int saa7134_i2c_call_saa6752(struct saa7134_dev *dev,
 298                                               unsigned int cmd, void *arg)
 299 {
 300         if (dev->mpeg_i2c_client == NULL)
 301                 return -EINVAL;
 302         return dev->mpeg_i2c_client->driver->command(dev->mpeg_i2c_client,
 303                                                                 cmd, arg);
 304 }
 305
 306 static int empress_s_ext_ctrls(struct file *file, void *priv,
 307                                struct v4l2_ext_controls *ctrls)
 308 {
 309         struct saa7134_dev *dev = file->private_data;
 310         int err;
 311
 312         /* count == 0 is abused in saa6752hs.c, so that special
 313                 case is handled here explicitly. */
 314         if (ctrls->count == 0)
 315                 return 0;
 316
 317         if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 318                 return -EINVAL;
 319
 320         err = saa7134_i2c_call_saa6752(dev, VIDIOC_S_EXT_CTRLS, ctrls);
 321         ts_init_encoder(dev);
 322
 323         return err;
 324 }
 325
 326 static int empress_g_ext_ctrls(struct file *file, void *priv,
 327                                struct v4l2_ext_controls *ctrls)
 328 {
 329         struct saa7134_dev *dev = file->private_data;
 330
 331         if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 332                 return -EINVAL;
 333         return saa7134_i2c_call_saa6752(dev, VIDIOC_G_EXT_CTRLS, ctrls);
 334 }
 335
 336 static int empress_g_ctrl(struct file *file, void *priv,
 337                                         struct v4l2_control *c)
 338 {
 339         struct saa7134_dev *dev = file->private_data;
 340
 341         return saa7134_g_ctrl_internal(dev, NULL, c);
 342 }
 343
 344 static int empress_s_ctrl(struct file *file, void *priv,
 345                                         struct v4l2_control *c)
 346 {
 347         struct saa7134_dev *dev = file->private_data;
 348
 349         return saa7134_s_ctrl_internal(dev, NULL, c);
 350 }
 351
 352 static int empress_queryctrl(struct file *file, void *priv,
 353                                         struct v4l2_queryctrl *c)
 354 {
 355         static const u32 user_ctrls[] = {
 356                 V4L2_CID_USER_CLASS,
 357                 V4L2_CID_BRIGHTNESS,
 358                 V4L2_CID_CONTRAST,
 359                 V4L2_CID_SATURATION,
 360                 V4L2_CID_HUE,
 361                 V4L2_CID_AUDIO_VOLUME,
 362                 V4L2_CID_AUDIO_MUTE,
 363                 V4L2_CID_HFLIP,
 364                 0
 365         };
 366
 367         static const u32 mpeg_ctrls[] = {
 368                 V4L2_CID_MPEG_CLASS,
 369                 V4L2_CID_MPEG_STREAM_TYPE,
 370                 V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ,
 371                 V4L2_CID_MPEG_AUDIO_ENCODING,
 372                 V4L2_CID_MPEG_AUDIO_L2_BITRATE,
 373                 V4L2_CID_MPEG_VIDEO_ENCODING,
 374                 V4L2_CID_MPEG_VIDEO_ASPECT,
 375                 V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
 376                 V4L2_CID_MPEG_VIDEO_BITRATE,
 377                 V4L2_CID_MPEG_VIDEO_BITRATE_PEAK,
 378                 0
 379         };
 380         static const u32 *ctrl_classes[] = {
 381                 user_ctrls,
 382                 mpeg_ctrls,
 383                 NULL
 384         };
 385         struct saa7134_dev *dev = file->private_data;
 386
 387         c->id = v4l2_ctrl_next(ctrl_classes, c->id);
 388         if (c->id == 0)
 389                 return -EINVAL;
 390         if (c->id == V4L2_CID_USER_CLASS || c->id == V4L2_CID_MPEG_CLASS)
 391                 return v4l2_ctrl_query_fill_std(c);
 392         if (V4L2_CTRL_ID2CLASS(c->id) != V4L2_CTRL_CLASS_MPEG)
 393                 return saa7134_queryctrl(file, priv, c);
 394         return saa7134_i2c_call_saa6752(dev, VIDIOC_QUERYCTRL, c);
 395 }
 396
 397 static int empress_querymenu(struct file *file, void *priv,
 398                                         struct v4l2_querymenu *c)
 399 {
 400         struct saa7134_dev *dev = file->private_data;
 401
 402         if (V4L2_CTRL_ID2CLASS(c->id) != V4L2_CTRL_CLASS_MPEG)
 403                 return -EINVAL;
 404         return saa7134_i2c_call_saa6752(dev, VIDIOC_QUERYMENU, c);
 405 }
 406
 407 static int empress_g_chip_ident(struct file *file, void *fh,
 408                struct v4l2_chip_ident *chip)
 409 {
 410         struct saa7134_dev *dev = file->private_data;
 411
 412         chip->ident = V4L2_IDENT_NONE;
 413         chip->revision = 0;
 414         if (dev->mpeg_i2c_client == NULL)
 415                 return -EINVAL;
 416         if (chip->match_type == V4L2_CHIP_MATCH_I2C_DRIVER &&
 417             chip->match_chip == I2C_DRIVERID_SAA6752HS)
 418                 return saa7134_i2c_call_saa6752(dev, VIDIOC_G_CHIP_IDENT, chip);
 419         if (chip->match_type == V4L2_CHIP_MATCH_I2C_ADDR &&
 420             chip->match_chip == dev->mpeg_i2c_client->addr)
 421                 return saa7134_i2c_call_saa6752(dev, VIDIOC_G_CHIP_IDENT, chip);
 422         return -EINVAL;
 423 }
 424
 425
 426 static const struct file_operations ts_fops =
 427 {
 428         .owner    = THIS_MODULE,
 429         .open     = ts_open,
 430         .release  = ts_release,
 431         .read     = ts_read,
 432         .poll     = ts_poll,
 433         .mmap     = ts_mmap,
 434         .ioctl    = video_ioctl2,
 435         .llseek   = no_llseek,
 436 };
 437
 438 static const struct v4l2_ioctl_ops ts_ioctl_ops = {
 439         .vidioc_querycap                = empress_querycap,
 440         .vidioc_enum_fmt_vid_cap        = empress_enum_fmt_vid_cap,
 441         .vidioc_s_fmt_vid_cap           = empress_s_fmt_vid_cap,
 442         .vidioc_g_fmt_vid_cap           = empress_g_fmt_vid_cap,
 443         .vidioc_reqbufs                 = empress_reqbufs,
 444         .vidioc_querybuf                = empress_querybuf,
 445         .vidioc_qbuf                    = empress_qbuf,
 446         .vidioc_dqbuf                   = empress_dqbuf,
 447         .vidioc_streamon                = empress_streamon,
 448         .vidioc_streamoff               = empress_streamoff,
 449         .vidioc_s_ext_ctrls             = empress_s_ext_ctrls,
 450         .vidioc_g_ext_ctrls             = empress_g_ext_ctrls,
 451         .vidioc_enum_input              = empress_enum_input,
 452         .vidioc_g_input                 = empress_g_input,
 453         .vidioc_s_input                 = empress_s_input,
 454         .vidioc_queryctrl               = empress_queryctrl,
 455         .vidioc_querymenu               = empress_querymenu,
 456         .vidioc_g_ctrl                  = empress_g_ctrl,
 457         .vidioc_s_ctrl                  = empress_s_ctrl,
 458         .vidioc_g_chip_ident            = empress_g_chip_ident,
 459 };
 460
 461 /* ----------------------------------------------------------- */
 462
 463 static struct video_device saa7134_empress_template = {
 464         .name          = "saa7134-empress",
 465         .fops          = &ts_fops,
 466         .minor         = -1,
 467         .ioctl_ops     = &ts_ioctl_ops,
 468
 469         .tvnorms                        = SAA7134_NORMS,
 470         .current_norm                   = V4L2_STD_PAL,
 471 };
 472
 473 static void empress_signal_update(struct work_struct *work)
 474 {
 475         struct saa7134_dev* dev =
 476                 container_of(work, struct saa7134_dev, empress_workqueue);
 477
 478         if (dev->nosignal) {
 479                 dprintk("no video signal\n");
 480                 ts_reset_encoder(dev);
 481         } else {
 482                 dprintk("video signal acquired\n");
 483                 if (atomic_read(&dev->empress_users))
 484                         ts_init_encoder(dev);
 485         }
 486 }
 487
 488 static void empress_signal_change(struct saa7134_dev *dev)
 489 {
 490         schedule_work(&dev->empress_workqueue);
 491 }
 492
 493
 494 static int empress_init(struct saa7134_dev *dev)
 495 {
 496         int err;
 497
 498         dprintk("%s: %s\n",dev->name,__func__);
 499         dev->empress_dev = video_device_alloc();
 500         if (NULL == dev->empress_dev)
 501                 return -ENOMEM;
 502         *(dev->empress_dev) = saa7134_empress_template;
 503         dev->empress_dev->parent  = &dev->pci->dev;
 504         dev->empress_dev->release = video_device_release;
 505         snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
 506                  "%s empress (%s)", dev->name,
 507                  saa7134_boards[dev->board].name);
 508
 509         INIT_WORK(&dev->empress_workqueue, empress_signal_update);
 510
 511         err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
 512                                     empress_nr[dev->nr]);
 513         if (err < 0) {
 514                 printk(KERN_INFO "%s: can't register video device\n",
 515                        dev->name);
 516                 video_device_release(dev->empress_dev);
 517                 dev->empress_dev = NULL;
 518                 return err;
 519         }
 520         printk(KERN_INFO "%s: registered device video%d [mpeg]\n",
 521                dev->name,dev->empress_dev->minor & 0x1f);
 522
 523         videobuf_queue_sg_init(&dev->empress_tsq, &saa7134_ts_qops,
 524                             &dev->pci->dev, &dev->slock,
 525                             V4L2_BUF_TYPE_VIDEO_CAPTURE,
 526                             V4L2_FIELD_ALTERNATE,
 527                             sizeof(struct saa7134_buf),
 528                             dev);
 529
 530         empress_signal_update(&dev->empress_workqueue);
 531         return 0;
 532 }
 533
 534 static int empress_fini(struct saa7134_dev *dev)
 535 {
 536         dprintk("%s: %s\n",dev->name,__func__);
 537
 538         if (NULL == dev->empress_dev)
 539                 return 0;
 540         flush_scheduled_work();
 541         video_unregister_device(dev->empress_dev);
 542         dev->empress_dev = NULL;
 543         return 0;
 544 }
 545
 546 static struct saa7134_mpeg_ops empress_ops = {
 547         .type          = SAA7134_MPEG_EMPRESS,
 548         .init          = empress_init,
 549         .fini          = empress_fini,
 550         .signal_change = empress_signal_change,
 551 };
 552
 553 static int __init empress_register(void)
 554 {
 555         return saa7134_ts_register(&empress_ops);
 556 }
 557
 558 static void __exit empress_unregister(void)
 559 {
 560         saa7134_ts_unregister(&empress_ops);
 561 }
 562
 563 module_init(empress_register);
 564 module_exit(empress_unregister);
 565
 566 /* ----------------------------------------------------------- */
 567 /*
 568  * Local variables:
 569  * c-basic-offset: 8
 570  * End:
 571  */