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/smp_lock.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         saa_call_all(dev, core, init, leading_null_bytes);
  80         dev->empress_started = 1;
  81         return 0;
  82 }
  83
  84 /* ------------------------------------------------------------------ */
  85
  86 static int ts_open(struct file *file)
  87 {
  88         struct video_device *vdev = video_devdata(file);
  89         struct saa7134_dev *dev = video_drvdata(file);
  90         int err;
  91
  92         dprintk("open dev=%s\n", video_device_node_name(vdev));
  93         err = -EBUSY;
  94         if (!mutex_trylock(&dev->empress_tsq.vb_lock))
  95                 return err;
  96         if (atomic_read(&dev->empress_users))
  97                 goto done;
  98
  99         /* Unmute audio */
 100         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
 101                 saa_readb(SAA7134_AUDIO_MUTE_CTRL) & ~(1 << 6));
 102
 103         atomic_inc(&dev->empress_users);
 104         file->private_data = dev;
 105         err = 0;
 106
 107 done:
 108         mutex_unlock(&dev->empress_tsq.vb_lock);
 109         return err;
 110 }
 111
 112 static int ts_release(struct file *file)
 113 {
 114         struct saa7134_dev *dev = file->private_data;
 115
 116         videobuf_stop(&dev->empress_tsq);
 117         videobuf_mmap_free(&dev->empress_tsq);
 118
 119         /* stop the encoder */
 120         ts_reset_encoder(dev);
 121
 122         /* Mute audio */
 123         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
 124                 saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6));
 125
 126         atomic_dec(&dev->empress_users);
 127
 128         return 0;
 129 }
 130
 131 static ssize_t
 132 ts_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
 133 {
 134         struct saa7134_dev *dev = file->private_data;
 135
 136         if (!dev->empress_started)
 137                 ts_init_encoder(dev);
 138
 139         return videobuf_read_stream(&dev->empress_tsq,
 140                                     data, count, ppos, 0,
 141                                     file->f_flags & O_NONBLOCK);
 142 }
 143
 144 static unsigned int
 145 ts_poll(struct file *file, struct poll_table_struct *wait)
 146 {
 147         struct saa7134_dev *dev = file->private_data;
 148
 149         return videobuf_poll_stream(file, &dev->empress_tsq, wait);
 150 }
 151
 152
 153 static int
 154 ts_mmap(struct file *file, struct vm_area_struct * vma)
 155 {
 156         struct saa7134_dev *dev = file->private_data;
 157
 158         return videobuf_mmap_mapper(&dev->empress_tsq, vma);
 159 }
 160
 161 /*
 162  * This function is _not_ called directly, but from
 163  * video_generic_ioctl (and maybe others).  userspace
 164  * copying is done already, arg is a kernel pointer.
 165  */
 166
 167 static int empress_querycap(struct file *file, void  *priv,
 168                                         struct v4l2_capability *cap)
 169 {
 170         struct saa7134_dev *dev = file->private_data;
 171
 172         strcpy(cap->driver, "saa7134");
 173         strlcpy(cap->card, saa7134_boards[dev->board].name,
 174                 sizeof(cap->card));
 175         sprintf(cap->bus_info, "PCI:%s", pci_name(dev->pci));
 176         cap->version = SAA7134_VERSION_CODE;
 177         cap->capabilities =
 178                 V4L2_CAP_VIDEO_CAPTURE |
 179                 V4L2_CAP_READWRITE |
 180                 V4L2_CAP_STREAMING;
 181         return 0;
 182 }
 183
 184 static int empress_enum_input(struct file *file, void *priv,
 185                                         struct v4l2_input *i)
 186 {
 187         if (i->index != 0)
 188                 return -EINVAL;
 189
 190         i->type = V4L2_INPUT_TYPE_CAMERA;
 191         strcpy(i->name, "CCIR656");
 192
 193         return 0;
 194 }
 195
 196 static int empress_g_input(struct file *file, void *priv, unsigned int *i)
 197 {
 198         *i = 0;
 199         return 0;
 200 }
 201
 202 static int empress_s_input(struct file *file, void *priv, unsigned int i)
 203 {
 204         if (i != 0)
 205                 return -EINVAL;
 206
 207         return 0;
 208 }
 209
 210 static int empress_enum_fmt_vid_cap(struct file *file, void  *priv,
 211                                         struct v4l2_fmtdesc *f)
 212 {
 213         if (f->index != 0)
 214                 return -EINVAL;
 215
 216         strlcpy(f->description, "MPEG TS", sizeof(f->description));
 217         f->pixelformat = V4L2_PIX_FMT_MPEG;
 218
 219         return 0;
 220 }
 221
 222 static int empress_g_fmt_vid_cap(struct file *file, void *priv,
 223                                 struct v4l2_format *f)
 224 {
 225         struct saa7134_dev *dev = file->private_data;
 226         struct v4l2_mbus_framefmt mbus_fmt;
 227
 228         saa_call_all(dev, video, g_mbus_fmt, &mbus_fmt);
 229
 230         v4l2_fill_pix_format(&f->fmt.pix, &mbus_fmt);
 231         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 232         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 233
 234         return 0;
 235 }
 236
 237 static int empress_s_fmt_vid_cap(struct file *file, void *priv,
 238                                 struct v4l2_format *f)
 239 {
 240         struct saa7134_dev *dev = file->private_data;
 241         struct v4l2_mbus_framefmt mbus_fmt;
 242
 243         v4l2_fill_mbus_format(&mbus_fmt, &f->fmt.pix, V4L2_MBUS_FMT_FIXED);
 244         saa_call_all(dev, video, s_mbus_fmt, &mbus_fmt);
 245         v4l2_fill_pix_format(&f->fmt.pix, &mbus_fmt);
 246
 247         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 248         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 249
 250         return 0;
 251 }
 252
 253 static int empress_try_fmt_vid_cap(struct file *file, void *priv,
 254                                 struct v4l2_format *f)
 255 {
 256         struct saa7134_dev *dev = file->private_data;
 257
 258         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 259         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 260
 261         return 0;
 262 }
 263
 264 static int empress_reqbufs(struct file *file, void *priv,
 265                                         struct v4l2_requestbuffers *p)
 266 {
 267         struct saa7134_dev *dev = file->private_data;
 268
 269         return videobuf_reqbufs(&dev->empress_tsq, p);
 270 }
 271
 272 static int empress_querybuf(struct file *file, void *priv,
 273                                         struct v4l2_buffer *b)
 274 {
 275         struct saa7134_dev *dev = file->private_data;
 276
 277         return videobuf_querybuf(&dev->empress_tsq, b);
 278 }
 279
 280 static int empress_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
 281 {
 282         struct saa7134_dev *dev = file->private_data;
 283
 284         return videobuf_qbuf(&dev->empress_tsq, b);
 285 }
 286
 287 static int empress_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
 288 {
 289         struct saa7134_dev *dev = file->private_data;
 290
 291         return videobuf_dqbuf(&dev->empress_tsq, b,
 292                                 file->f_flags & O_NONBLOCK);
 293 }
 294
 295 static int empress_streamon(struct file *file, void *priv,
 296                                         enum v4l2_buf_type type)
 297 {
 298         struct saa7134_dev *dev = file->private_data;
 299
 300         return videobuf_streamon(&dev->empress_tsq);
 301 }
 302
 303 static int empress_streamoff(struct file *file, void *priv,
 304                                         enum v4l2_buf_type type)
 305 {
 306         struct saa7134_dev *dev = file->private_data;
 307
 308         return videobuf_streamoff(&dev->empress_tsq);
 309 }
 310
 311 static int empress_s_ext_ctrls(struct file *file, void *priv,
 312                                struct v4l2_ext_controls *ctrls)
 313 {
 314         struct saa7134_dev *dev = file->private_data;
 315         int err;
 316
 317         /* count == 0 is abused in saa6752hs.c, so that special
 318                 case is handled here explicitly. */
 319         if (ctrls->count == 0)
 320                 return 0;
 321
 322         if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 323                 return -EINVAL;
 324
 325         err = saa_call_empress(dev, core, s_ext_ctrls, ctrls);
 326         ts_init_encoder(dev);
 327
 328         return err;
 329 }
 330
 331 static int empress_g_ext_ctrls(struct file *file, void *priv,
 332                                struct v4l2_ext_controls *ctrls)
 333 {
 334         struct saa7134_dev *dev = file->private_data;
 335
 336         if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 337                 return -EINVAL;
 338         return saa_call_empress(dev, core, g_ext_ctrls, ctrls);
 339 }
 340
 341 static int empress_g_ctrl(struct file *file, void *priv,
 342                                         struct v4l2_control *c)
 343 {
 344         struct saa7134_dev *dev = file->private_data;
 345
 346         return saa7134_g_ctrl_internal(dev, NULL, c);
 347 }
 348
 349 static int empress_s_ctrl(struct file *file, void *priv,
 350                                         struct v4l2_control *c)
 351 {
 352         struct saa7134_dev *dev = file->private_data;
 353
 354         return saa7134_s_ctrl_internal(dev, NULL, c);
 355 }
 356
 357 static int empress_queryctrl(struct file *file, void *priv,
 358                                         struct v4l2_queryctrl *c)
 359 {
 360         /* Must be sorted from low to high control ID! */
 361         static const u32 user_ctrls[] = {
 362                 V4L2_CID_USER_CLASS,
 363                 V4L2_CID_BRIGHTNESS,
 364                 V4L2_CID_CONTRAST,
 365                 V4L2_CID_SATURATION,
 366                 V4L2_CID_HUE,
 367                 V4L2_CID_AUDIO_VOLUME,
 368                 V4L2_CID_AUDIO_MUTE,
 369                 V4L2_CID_HFLIP,
 370                 0
 371         };
 372
 373         /* Must be sorted from low to high control ID! */
 374         static const u32 mpeg_ctrls[] = {
 375                 V4L2_CID_MPEG_CLASS,
 376                 V4L2_CID_MPEG_STREAM_TYPE,
 377                 V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ,
 378                 V4L2_CID_MPEG_AUDIO_ENCODING,
 379                 V4L2_CID_MPEG_AUDIO_L2_BITRATE,
 380                 V4L2_CID_MPEG_VIDEO_ENCODING,
 381                 V4L2_CID_MPEG_VIDEO_ASPECT,
 382                 V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
 383                 V4L2_CID_MPEG_VIDEO_BITRATE,
 384                 V4L2_CID_MPEG_VIDEO_BITRATE_PEAK,
 385                 0
 386         };
 387         static const u32 *ctrl_classes[] = {
 388                 user_ctrls,
 389                 mpeg_ctrls,
 390                 NULL
 391         };
 392         struct saa7134_dev *dev = file->private_data;
 393
 394         c->id = v4l2_ctrl_next(ctrl_classes, c->id);
 395         if (c->id == 0)
 396                 return -EINVAL;
 397         if (c->id == V4L2_CID_USER_CLASS || c->id == V4L2_CID_MPEG_CLASS)
 398                 return v4l2_ctrl_query_fill(c, 0, 0, 0, 0);
 399         if (V4L2_CTRL_ID2CLASS(c->id) != V4L2_CTRL_CLASS_MPEG)
 400                 return saa7134_queryctrl(file, priv, c);
 401         return saa_call_empress(dev, core, queryctrl, c);
 402 }
 403
 404 static int empress_querymenu(struct file *file, void *priv,
 405                                         struct v4l2_querymenu *c)
 406 {
 407         struct saa7134_dev *dev = file->private_data;
 408
 409         if (V4L2_CTRL_ID2CLASS(c->id) != V4L2_CTRL_CLASS_MPEG)
 410                 return -EINVAL;
 411         return saa_call_empress(dev, core, querymenu, c);
 412 }
 413
 414 static int empress_g_chip_ident(struct file *file, void *fh,
 415                struct v4l2_dbg_chip_ident *chip)
 416 {
 417         struct saa7134_dev *dev = file->private_data;
 418
 419         chip->ident = V4L2_IDENT_NONE;
 420         chip->revision = 0;
 421         if (chip->match.type == V4L2_CHIP_MATCH_I2C_DRIVER &&
 422             !strcmp(chip->match.name, "saa6752hs"))
 423                 return saa_call_empress(dev, core, g_chip_ident, chip);
 424         if (chip->match.type == V4L2_CHIP_MATCH_I2C_ADDR)
 425                 return saa_call_empress(dev, core, g_chip_ident, chip);
 426         return -EINVAL;
 427 }
 428
 429 static int empress_s_std(struct file *file, void *priv, v4l2_std_id *id)
 430 {
 431         struct saa7134_dev *dev = file->private_data;
 432
 433         return saa7134_s_std_internal(dev, NULL, id);
 434 }
 435
 436 static int empress_g_std(struct file *file, void *priv, v4l2_std_id *id)
 437 {
 438         struct saa7134_dev *dev = file->private_data;
 439
 440         *id = dev->tvnorm->id;
 441         return 0;
 442 }
 443
 444 static const struct v4l2_file_operations ts_fops =
 445 {
 446         .owner    = THIS_MODULE,
 447         .open     = ts_open,
 448         .release  = ts_release,
 449         .read     = ts_read,
 450         .poll     = ts_poll,
 451         .mmap     = ts_mmap,
 452         .ioctl    = video_ioctl2,
 453 };
 454
 455 static const struct v4l2_ioctl_ops ts_ioctl_ops = {
 456         .vidioc_querycap                = empress_querycap,
 457         .vidioc_enum_fmt_vid_cap        = empress_enum_fmt_vid_cap,
 458         .vidioc_try_fmt_vid_cap         = empress_try_fmt_vid_cap,
 459         .vidioc_s_fmt_vid_cap           = empress_s_fmt_vid_cap,
 460         .vidioc_g_fmt_vid_cap           = empress_g_fmt_vid_cap,
 461         .vidioc_reqbufs                 = empress_reqbufs,
 462         .vidioc_querybuf                = empress_querybuf,
 463         .vidioc_qbuf                    = empress_qbuf,
 464         .vidioc_dqbuf                   = empress_dqbuf,
 465         .vidioc_streamon                = empress_streamon,
 466         .vidioc_streamoff               = empress_streamoff,
 467         .vidioc_s_ext_ctrls             = empress_s_ext_ctrls,
 468         .vidioc_g_ext_ctrls             = empress_g_ext_ctrls,
 469         .vidioc_enum_input              = empress_enum_input,
 470         .vidioc_g_input                 = empress_g_input,
 471         .vidioc_s_input                 = empress_s_input,
 472         .vidioc_queryctrl               = empress_queryctrl,
 473         .vidioc_querymenu               = empress_querymenu,
 474         .vidioc_g_ctrl                  = empress_g_ctrl,
 475         .vidioc_s_ctrl                  = empress_s_ctrl,
 476         .vidioc_g_chip_ident            = empress_g_chip_ident,
 477         .vidioc_s_std                   = empress_s_std,
 478         .vidioc_g_std                   = empress_g_std,
 479 };
 480
 481 /* ----------------------------------------------------------- */
 482
 483 static struct video_device saa7134_empress_template = {
 484         .name          = "saa7134-empress",
 485         .fops          = &ts_fops,
 486         .ioctl_ops     = &ts_ioctl_ops,
 487
 488         .tvnorms                        = SAA7134_NORMS,
 489         .current_norm                   = V4L2_STD_PAL,
 490 };
 491
 492 static void empress_signal_update(struct work_struct *work)
 493 {
 494         struct saa7134_dev* dev =
 495                 container_of(work, struct saa7134_dev, empress_workqueue);
 496
 497         if (dev->nosignal) {
 498                 dprintk("no video signal\n");
 499         } else {
 500                 dprintk("video signal acquired\n");
 501         }
 502 }
 503
 504 static void empress_signal_change(struct saa7134_dev *dev)
 505 {
 506         schedule_work(&dev->empress_workqueue);
 507 }
 508
 509
 510 static int empress_init(struct saa7134_dev *dev)
 511 {
 512         int err;
 513
 514         dprintk("%s: %s\n",dev->name,__func__);
 515         dev->empress_dev = video_device_alloc();
 516         if (NULL == dev->empress_dev)
 517                 return -ENOMEM;
 518         *(dev->empress_dev) = saa7134_empress_template;
 519         dev->empress_dev->parent  = &dev->pci->dev;
 520         dev->empress_dev->release = video_device_release;
 521         snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
 522                  "%s empress (%s)", dev->name,
 523                  saa7134_boards[dev->board].name);
 524
 525         INIT_WORK(&dev->empress_workqueue, empress_signal_update);
 526
 527         video_set_drvdata(dev->empress_dev, dev);
 528         err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
 529                                     empress_nr[dev->nr]);
 530         if (err < 0) {
 531                 printk(KERN_INFO "%s: can't register video device\n",
 532                        dev->name);
 533                 video_device_release(dev->empress_dev);
 534                 dev->empress_dev = NULL;
 535                 return err;
 536         }
 537         printk(KERN_INFO "%s: registered device %s [mpeg]\n",
 538                dev->name, video_device_node_name(dev->empress_dev));
 539
 540         videobuf_queue_sg_init(&dev->empress_tsq, &saa7134_ts_qops,
 541                             &dev->pci->dev, &dev->slock,
 542                             V4L2_BUF_TYPE_VIDEO_CAPTURE,
 543                             V4L2_FIELD_ALTERNATE,
 544                             sizeof(struct saa7134_buf),
 545                             dev, NULL);
 546
 547         empress_signal_update(&dev->empress_workqueue);
 548         return 0;
 549 }
 550
 551 static int empress_fini(struct saa7134_dev *dev)
 552 {
 553         dprintk("%s: %s\n",dev->name,__func__);
 554
 555         if (NULL == dev->empress_dev)
 556                 return 0;
 557         flush_scheduled_work();
 558         video_unregister_device(dev->empress_dev);
 559         dev->empress_dev = NULL;
 560         return 0;
 561 }
 562
 563 static struct saa7134_mpeg_ops empress_ops = {
 564         .type          = SAA7134_MPEG_EMPRESS,
 565         .init          = empress_init,
 566         .fini          = empress_fini,
 567         .signal_change = empress_signal_change,
 568 };
 569
 570 static int __init empress_register(void)
 571 {
 572         return saa7134_ts_register(&empress_ops);
 573 }
 574
 575 static void __exit empress_unregister(void)
 576 {
 577         saa7134_ts_unregister(&empress_ops);
 578 }
 579
 580 module_init(empress_register);
 581 module_exit(empress_unregister);
 582
 583 /* ----------------------------------------------------------- */
 584 /*
 585  * Local variables:
 586  * c-basic-offset: 8
 587  * End:
 588  */