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         u32 leading_null_bytes = 0;
  68
  69         /* If more cards start to need this, then this
  70            should probably be added to the card definitions. */
  71         switch (dev->board) {
  72         case SAA7134_BOARD_BEHOLD_M6:
  73         case SAA7134_BOARD_BEHOLD_M63:
  74         case SAA7134_BOARD_BEHOLD_M6_EXTRA:
  75                 leading_null_bytes = 1;
  76                 break;
  77         }
  78         ts_reset_encoder(dev);
  79         saa7134_i2c_call_clients(dev, VIDIOC_INT_INIT, &leading_null_bytes);
  80         dev->empress_started = 1;
  81         return 0;
  82 }
  83
  84 /* ------------------------------------------------------------------ */
  85
  86 static int ts_open(struct inode *inode, struct file *file)
  87 {
  88         int minor = iminor(inode);
  89         struct saa7134_dev *dev;
  90         int err;
  91
  92         lock_kernel();
  93         list_for_each_entry(dev, &saa7134_devlist, devlist)
  94                 if (dev->empress_dev && dev->empress_dev->minor == minor)
  95                         goto found;
  96         unlock_kernel();
  97         return -ENODEV;
  98  found:
  99
 100         dprintk("open minor=%d\n",minor);
 101         err = -EBUSY;
 102         if (!mutex_trylock(&dev->empress_tsq.vb_lock))
 103                 goto done;
 104         if (atomic_read(&dev->empress_users))
 105                 goto done_up;
 106
 107         /* Unmute audio */
 108         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
 109                 saa_readb(SAA7134_AUDIO_MUTE_CTRL) & ~(1 << 6));
 110
 111         atomic_inc(&dev->empress_users);
 112         file->private_data = dev;
 113         err = 0;
 114
 115 done_up:
 116         mutex_unlock(&dev->empress_tsq.vb_lock);
 117 done:
 118         unlock_kernel();
 119         return err;
 120 }
 121
 122 static int ts_release(struct inode *inode, struct file *file)
 123 {
 124         struct saa7134_dev *dev = file->private_data;
 125
 126         videobuf_stop(&dev->empress_tsq);
 127         videobuf_mmap_free(&dev->empress_tsq);
 128
 129         /* stop the encoder */
 130         ts_reset_encoder(dev);
 131
 132         /* Mute audio */
 133         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
 134                 saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6));
 135
 136         atomic_dec(&dev->empress_users);
 137
 138         return 0;
 139 }
 140
 141 static ssize_t
 142 ts_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
 143 {
 144         struct saa7134_dev *dev = file->private_data;
 145
 146         if (!dev->empress_started)
 147                 ts_init_encoder(dev);
 148
 149         return videobuf_read_stream(&dev->empress_tsq,
 150                                     data, count, ppos, 0,
 151                                     file->f_flags & O_NONBLOCK);
 152 }
 153
 154 static unsigned int
 155 ts_poll(struct file *file, struct poll_table_struct *wait)
 156 {
 157         struct saa7134_dev *dev = file->private_data;
 158
 159         return videobuf_poll_stream(file, &dev->empress_tsq, wait);
 160 }
 161
 162
 163 static int
 164 ts_mmap(struct file *file, struct vm_area_struct * vma)
 165 {
 166         struct saa7134_dev *dev = file->private_data;
 167
 168         return videobuf_mmap_mapper(&dev->empress_tsq, vma);
 169 }
 170
 171 /*
 172  * This function is _not_ called directly, but from
 173  * video_generic_ioctl (and maybe others).  userspace
 174  * copying is done already, arg is a kernel pointer.
 175  */
 176
 177 static int empress_querycap(struct file *file, void  *priv,
 178                                         struct v4l2_capability *cap)
 179 {
 180         struct saa7134_dev *dev = file->private_data;
 181
 182         strcpy(cap->driver, "saa7134");
 183         strlcpy(cap->card, saa7134_boards[dev->board].name,
 184                 sizeof(cap->card));
 185         sprintf(cap->bus_info, "PCI:%s", pci_name(dev->pci));
 186         cap->version = SAA7134_VERSION_CODE;
 187         cap->capabilities =
 188                 V4L2_CAP_VIDEO_CAPTURE |
 189                 V4L2_CAP_READWRITE |
 190                 V4L2_CAP_STREAMING;
 191         return 0;
 192 }
 193
 194 static int empress_enum_input(struct file *file, void *priv,
 195                                         struct v4l2_input *i)
 196 {
 197         if (i->index != 0)
 198                 return -EINVAL;
 199
 200         i->type = V4L2_INPUT_TYPE_CAMERA;
 201         strcpy(i->name, "CCIR656");
 202
 203         return 0;
 204 }
 205
 206 static int empress_g_input(struct file *file, void *priv, unsigned int *i)
 207 {
 208         *i = 0;
 209         return 0;
 210 }
 211
 212 static int empress_s_input(struct file *file, void *priv, unsigned int i)
 213 {
 214         if (i != 0)
 215                 return -EINVAL;
 216
 217         return 0;
 218 }
 219
 220 static int empress_enum_fmt_vid_cap(struct file *file, void  *priv,
 221                                         struct v4l2_fmtdesc *f)
 222 {
 223         if (f->index != 0)
 224                 return -EINVAL;
 225
 226         strlcpy(f->description, "MPEG TS", sizeof(f->description));
 227         f->pixelformat = V4L2_PIX_FMT_MPEG;
 228
 229         return 0;
 230 }
 231
 232 static int empress_g_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_G_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 static int empress_s_fmt_vid_cap(struct file *file, void *priv,
 246                                 struct v4l2_format *f)
 247 {
 248         struct saa7134_dev *dev = file->private_data;
 249
 250         saa7134_i2c_call_clients(dev, VIDIOC_S_FMT, f);
 251
 252         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 253         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 254
 255         return 0;
 256 }
 257
 258
 259 static int empress_reqbufs(struct file *file, void *priv,
 260                                         struct v4l2_requestbuffers *p)
 261 {
 262         struct saa7134_dev *dev = file->private_data;
 263
 264         return videobuf_reqbufs(&dev->empress_tsq, p);
 265 }
 266
 267 static int empress_querybuf(struct file *file, void *priv,
 268                                         struct v4l2_buffer *b)
 269 {
 270         struct saa7134_dev *dev = file->private_data;
 271
 272         return videobuf_querybuf(&dev->empress_tsq, b);
 273 }
 274
 275 static int empress_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
 276 {
 277         struct saa7134_dev *dev = file->private_data;
 278
 279         return videobuf_qbuf(&dev->empress_tsq, b);
 280 }
 281
 282 static int empress_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
 283 {
 284         struct saa7134_dev *dev = file->private_data;
 285
 286         return videobuf_dqbuf(&dev->empress_tsq, b,
 287                                 file->f_flags & O_NONBLOCK);
 288 }
 289
 290 static int empress_streamon(struct file *file, void *priv,
 291                                         enum v4l2_buf_type type)
 292 {
 293         struct saa7134_dev *dev = file->private_data;
 294
 295         return videobuf_streamon(&dev->empress_tsq);
 296 }
 297
 298 static int empress_streamoff(struct file *file, void *priv,
 299                                         enum v4l2_buf_type type)
 300 {
 301         struct saa7134_dev *dev = file->private_data;
 302
 303         return videobuf_streamoff(&dev->empress_tsq);
 304 }
 305
 306 static int saa7134_i2c_call_saa6752(struct saa7134_dev *dev,
 307                                               unsigned int cmd, void *arg)
 308 {
 309         if (dev->mpeg_i2c_client == NULL)
 310                 return -EINVAL;
 311         return dev->mpeg_i2c_client->driver->command(dev->mpeg_i2c_client,
 312                                                                 cmd, arg);
 313 }
 314
 315 static int empress_s_ext_ctrls(struct file *file, void *priv,
 316                                struct v4l2_ext_controls *ctrls)
 317 {
 318         struct saa7134_dev *dev = file->private_data;
 319         int err;
 320
 321         /* count == 0 is abused in saa6752hs.c, so that special
 322                 case is handled here explicitly. */
 323         if (ctrls->count == 0)
 324                 return 0;
 325
 326         if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 327                 return -EINVAL;
 328
 329         err = saa7134_i2c_call_saa6752(dev, VIDIOC_S_EXT_CTRLS, ctrls);
 330         ts_init_encoder(dev);
 331
 332         return err;
 333 }
 334
 335 static int empress_g_ext_ctrls(struct file *file, void *priv,
 336                                struct v4l2_ext_controls *ctrls)
 337 {
 338         struct saa7134_dev *dev = file->private_data;
 339
 340         if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 341                 return -EINVAL;
 342         return saa7134_i2c_call_saa6752(dev, VIDIOC_G_EXT_CTRLS, ctrls);
 343 }
 344
 345 static int empress_g_ctrl(struct file *file, void *priv,
 346                                         struct v4l2_control *c)
 347 {
 348         struct saa7134_dev *dev = file->private_data;
 349
 350         return saa7134_g_ctrl_internal(dev, NULL, c);
 351 }
 352
 353 static int empress_s_ctrl(struct file *file, void *priv,
 354                                         struct v4l2_control *c)
 355 {
 356         struct saa7134_dev *dev = file->private_data;
 357
 358         return saa7134_s_ctrl_internal(dev, NULL, c);
 359 }
 360
 361 static int empress_queryctrl(struct file *file, void *priv,
 362                                         struct v4l2_queryctrl *c)
 363 {
 364         static const u32 user_ctrls[] = {
 365                 V4L2_CID_USER_CLASS,
 366                 V4L2_CID_BRIGHTNESS,
 367                 V4L2_CID_CONTRAST,
 368                 V4L2_CID_SATURATION,
 369                 V4L2_CID_HUE,
 370                 V4L2_CID_AUDIO_VOLUME,
 371                 V4L2_CID_AUDIO_MUTE,
 372                 V4L2_CID_HFLIP,
 373                 0
 374         };
 375
 376         static const u32 mpeg_ctrls[] = {
 377                 V4L2_CID_MPEG_CLASS,
 378                 V4L2_CID_MPEG_STREAM_TYPE,
 379                 V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ,
 380                 V4L2_CID_MPEG_AUDIO_ENCODING,
 381                 V4L2_CID_MPEG_AUDIO_L2_BITRATE,
 382                 V4L2_CID_MPEG_VIDEO_ENCODING,
 383                 V4L2_CID_MPEG_VIDEO_ASPECT,
 384                 V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
 385                 V4L2_CID_MPEG_VIDEO_BITRATE,
 386                 V4L2_CID_MPEG_VIDEO_BITRATE_PEAK,
 387                 0
 388         };
 389         static const u32 *ctrl_classes[] = {
 390                 user_ctrls,
 391                 mpeg_ctrls,
 392                 NULL
 393         };
 394         struct saa7134_dev *dev = file->private_data;
 395
 396         c->id = v4l2_ctrl_next(ctrl_classes, c->id);
 397         if (c->id == 0)
 398                 return -EINVAL;
 399         if (c->id == V4L2_CID_USER_CLASS || c->id == V4L2_CID_MPEG_CLASS)
 400                 return v4l2_ctrl_query_fill_std(c);
 401         if (V4L2_CTRL_ID2CLASS(c->id) != V4L2_CTRL_CLASS_MPEG)
 402                 return saa7134_queryctrl(file, priv, c);
 403         return saa7134_i2c_call_saa6752(dev, VIDIOC_QUERYCTRL, c);
 404 }
 405
 406 static int empress_querymenu(struct file *file, void *priv,
 407                                         struct v4l2_querymenu *c)
 408 {
 409         struct saa7134_dev *dev = file->private_data;
 410
 411         if (V4L2_CTRL_ID2CLASS(c->id) != V4L2_CTRL_CLASS_MPEG)
 412                 return -EINVAL;
 413         return saa7134_i2c_call_saa6752(dev, VIDIOC_QUERYMENU, c);
 414 }
 415
 416 static int empress_g_chip_ident(struct file *file, void *fh,
 417                struct v4l2_chip_ident *chip)
 418 {
 419         struct saa7134_dev *dev = file->private_data;
 420
 421         chip->ident = V4L2_IDENT_NONE;
 422         chip->revision = 0;
 423         if (dev->mpeg_i2c_client == NULL)
 424                 return -EINVAL;
 425         if (chip->match_type == V4L2_CHIP_MATCH_I2C_DRIVER &&
 426             chip->match_chip == I2C_DRIVERID_SAA6752HS)
 427                 return saa7134_i2c_call_saa6752(dev, VIDIOC_G_CHIP_IDENT, chip);
 428         if (chip->match_type == V4L2_CHIP_MATCH_I2C_ADDR &&
 429             chip->match_chip == dev->mpeg_i2c_client->addr)
 430                 return saa7134_i2c_call_saa6752(dev, VIDIOC_G_CHIP_IDENT, chip);
 431         return -EINVAL;
 432 }
 433
 434
 435 static const struct file_operations ts_fops =
 436 {
 437         .owner    = THIS_MODULE,
 438         .open     = ts_open,
 439         .release  = ts_release,
 440         .read     = ts_read,
 441         .poll     = ts_poll,
 442         .mmap     = ts_mmap,
 443         .ioctl    = video_ioctl2,
 444         .llseek   = no_llseek,
 445 };
 446
 447 static const struct v4l2_ioctl_ops ts_ioctl_ops = {
 448         .vidioc_querycap                = empress_querycap,
 449         .vidioc_enum_fmt_vid_cap        = empress_enum_fmt_vid_cap,
 450         .vidioc_s_fmt_vid_cap           = empress_s_fmt_vid_cap,
 451         .vidioc_g_fmt_vid_cap           = empress_g_fmt_vid_cap,
 452         .vidioc_reqbufs                 = empress_reqbufs,
 453         .vidioc_querybuf                = empress_querybuf,
 454         .vidioc_qbuf                    = empress_qbuf,
 455         .vidioc_dqbuf                   = empress_dqbuf,
 456         .vidioc_streamon                = empress_streamon,
 457         .vidioc_streamoff               = empress_streamoff,
 458         .vidioc_s_ext_ctrls             = empress_s_ext_ctrls,
 459         .vidioc_g_ext_ctrls             = empress_g_ext_ctrls,
 460         .vidioc_enum_input              = empress_enum_input,
 461         .vidioc_g_input                 = empress_g_input,
 462         .vidioc_s_input                 = empress_s_input,
 463         .vidioc_queryctrl               = empress_queryctrl,
 464         .vidioc_querymenu               = empress_querymenu,
 465         .vidioc_g_ctrl                  = empress_g_ctrl,
 466         .vidioc_s_ctrl                  = empress_s_ctrl,
 467         .vidioc_g_chip_ident            = empress_g_chip_ident,
 468 };
 469
 470 /* ----------------------------------------------------------- */
 471
 472 static struct video_device saa7134_empress_template = {
 473         .name          = "saa7134-empress",
 474         .fops          = &ts_fops,
 475         .minor         = -1,
 476         .ioctl_ops     = &ts_ioctl_ops,
 477
 478         .tvnorms                        = SAA7134_NORMS,
 479         .current_norm                   = V4L2_STD_PAL,
 480 };
 481
 482 static void empress_signal_update(struct work_struct *work)
 483 {
 484         struct saa7134_dev* dev =
 485                 container_of(work, struct saa7134_dev, empress_workqueue);
 486
 487         if (dev->nosignal) {
 488                 dprintk("no video signal\n");
 489                 ts_reset_encoder(dev);
 490         } else {
 491                 dprintk("video signal acquired\n");
 492                 if (atomic_read(&dev->empress_users))
 493                         ts_init_encoder(dev);
 494         }
 495 }
 496
 497 static void empress_signal_change(struct saa7134_dev *dev)
 498 {
 499         schedule_work(&dev->empress_workqueue);
 500 }
 501
 502
 503 static int empress_init(struct saa7134_dev *dev)
 504 {
 505         int err;
 506
 507         dprintk("%s: %s\n",dev->name,__func__);
 508         dev->empress_dev = video_device_alloc();
 509         if (NULL == dev->empress_dev)
 510                 return -ENOMEM;
 511         *(dev->empress_dev) = saa7134_empress_template;
 512         dev->empress_dev->parent  = &dev->pci->dev;
 513         dev->empress_dev->release = video_device_release;
 514         snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
 515                  "%s empress (%s)", dev->name,
 516                  saa7134_boards[dev->board].name);
 517
 518         INIT_WORK(&dev->empress_workqueue, empress_signal_update);
 519
 520         err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
 521                                     empress_nr[dev->nr]);
 522         if (err < 0) {
 523                 printk(KERN_INFO "%s: can't register video device\n",
 524                        dev->name);
 525                 video_device_release(dev->empress_dev);
 526                 dev->empress_dev = NULL;
 527                 return err;
 528         }
 529         printk(KERN_INFO "%s: registered device video%d [mpeg]\n",
 530                dev->name,dev->empress_dev->minor & 0x1f);
 531
 532         videobuf_queue_sg_init(&dev->empress_tsq, &saa7134_ts_qops,
 533                             &dev->pci->dev, &dev->slock,
 534                             V4L2_BUF_TYPE_VIDEO_CAPTURE,
 535                             V4L2_FIELD_ALTERNATE,
 536                             sizeof(struct saa7134_buf),
 537                             dev);
 538
 539         empress_signal_update(&dev->empress_workqueue);
 540         return 0;
 541 }
 542
 543 static int empress_fini(struct saa7134_dev *dev)
 544 {
 545         dprintk("%s: %s\n",dev->name,__func__);
 546
 547         if (NULL == dev->empress_dev)
 548                 return 0;
 549         flush_scheduled_work();
 550         video_unregister_device(dev->empress_dev);
 551         dev->empress_dev = NULL;
 552         return 0;
 553 }
 554
 555 static struct saa7134_mpeg_ops empress_ops = {
 556         .type          = SAA7134_MPEG_EMPRESS,
 557         .init          = empress_init,
 558         .fini          = empress_fini,
 559         .signal_change = empress_signal_change,
 560 };
 561
 562 static int __init empress_register(void)
 563 {
 564         return saa7134_ts_register(&empress_ops);
 565 }
 566
 567 static void __exit empress_unregister(void)
 568 {
 569         saa7134_ts_unregister(&empress_ops);
 570 }
 571
 572 module_init(empress_register);
 573 module_exit(empress_unregister);
 574
 575 /* ----------------------------------------------------------- */
 576 /*
 577  * Local variables:
 578  * c-basic-offset: 8
 579  * End:
 580  */