drivers/media/pci/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/delay.h>
  25
  26 #include "saa7134-reg.h"
  27 #include "saa7134.h"
  28
  29 #include <media/saa6752hs.h>
  30 #include <media/v4l2-common.h>
  31
  32 /* ------------------------------------------------------------------ */
  33
  34 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
  35 MODULE_LICENSE("GPL");
  36
  37 static unsigned int empress_nr[] = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET };
  38
  39 module_param_array(empress_nr, int, NULL, 0444);
  40 MODULE_PARM_DESC(empress_nr,"ts device number");
  41
  42 static unsigned int debug;
  43 module_param(debug, int, 0644);
  44 MODULE_PARM_DESC(debug,"enable debug messages");
  45
  46 #define dprintk(fmt, arg...)    if (debug)                      \
  47         printk(KERN_DEBUG "%s/empress: " fmt, dev->name , ## arg)
  48
  49 /* ------------------------------------------------------------------ */
  50
  51 static void ts_reset_encoder(struct saa7134_dev* dev)
  52 {
  53         if (!dev->empress_started)
  54                 return;
  55
  56         saa_writeb(SAA7134_SPECIAL_MODE, 0x00);
  57         msleep(10);
  58         saa_writeb(SAA7134_SPECIAL_MODE, 0x01);
  59         msleep(100);
  60         dev->empress_started = 0;
  61 }
  62
  63 static int ts_init_encoder(struct saa7134_dev* dev)
  64 {
  65         u32 leading_null_bytes = 0;
  66
  67         /* If more cards start to need this, then this
  68            should probably be added to the card definitions. */
  69         switch (dev->board) {
  70         case SAA7134_BOARD_BEHOLD_M6:
  71         case SAA7134_BOARD_BEHOLD_M63:
  72         case SAA7134_BOARD_BEHOLD_M6_EXTRA:
  73                 leading_null_bytes = 1;
  74                 break;
  75         }
  76         ts_reset_encoder(dev);
  77         saa_call_all(dev, core, init, leading_null_bytes);
  78         dev->empress_started = 1;
  79         return 0;
  80 }
  81
  82 /* ------------------------------------------------------------------ */
  83
  84 static int ts_open(struct file *file)
  85 {
  86         struct video_device *vdev = video_devdata(file);
  87         struct saa7134_dev *dev = video_drvdata(file);
  88         int err;
  89
  90         dprintk("open dev=%s\n", video_device_node_name(vdev));
  91         err = -EBUSY;
  92         if (!mutex_trylock(&dev->empress_tsq.vb_lock))
  93                 return err;
  94         if (atomic_read(&dev->empress_users))
  95                 goto done;
  96
  97         /* Unmute audio */
  98         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
  99                 saa_readb(SAA7134_AUDIO_MUTE_CTRL) & ~(1 << 6));
 100
 101         atomic_inc(&dev->empress_users);
 102         file->private_data = dev;
 103         err = 0;
 104
 105 done:
 106         mutex_unlock(&dev->empress_tsq.vb_lock);
 107         return err;
 108 }
 109
 110 static int ts_release(struct file *file)
 111 {
 112         struct saa7134_dev *dev = file->private_data;
 113
 114         videobuf_stop(&dev->empress_tsq);
 115         videobuf_mmap_free(&dev->empress_tsq);
 116
 117         /* stop the encoder */
 118         ts_reset_encoder(dev);
 119
 120         /* Mute audio */
 121         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
 122                 saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6));
 123
 124         atomic_dec(&dev->empress_users);
 125
 126         return 0;
 127 }
 128
 129 static ssize_t
 130 ts_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
 131 {
 132         struct saa7134_dev *dev = file->private_data;
 133
 134         if (!dev->empress_started)
 135                 ts_init_encoder(dev);
 136
 137         return videobuf_read_stream(&dev->empress_tsq,
 138                                     data, count, ppos, 0,
 139                                     file->f_flags & O_NONBLOCK);
 140 }
 141
 142 static unsigned int
 143 ts_poll(struct file *file, struct poll_table_struct *wait)
 144 {
 145         struct saa7134_dev *dev = file->private_data;
 146
 147         return videobuf_poll_stream(file, &dev->empress_tsq, wait);
 148 }
 149
 150
 151 static int
 152 ts_mmap(struct file *file, struct vm_area_struct * vma)
 153 {
 154         struct saa7134_dev *dev = file->private_data;
 155
 156         return videobuf_mmap_mapper(&dev->empress_tsq, vma);
 157 }
 158
 159 /*
 160  * This function is _not_ called directly, but from
 161  * video_generic_ioctl (and maybe others).  userspace
 162  * copying is done already, arg is a kernel pointer.
 163  */
 164
 165 static int empress_querycap(struct file *file, void  *priv,
 166                                         struct v4l2_capability *cap)
 167 {
 168         struct saa7134_dev *dev = file->private_data;
 169
 170         strcpy(cap->driver, "saa7134");
 171         strlcpy(cap->card, saa7134_boards[dev->board].name,
 172                 sizeof(cap->card));
 173         sprintf(cap->bus_info, "PCI:%s", pci_name(dev->pci));
 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         f->flags = V4L2_FMT_FLAG_COMPRESSED;
 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         struct v4l2_mbus_framefmt mbus_fmt;
 224
 225         saa_call_all(dev, video, g_mbus_fmt, &mbus_fmt);
 226
 227         v4l2_fill_pix_format(&f->fmt.pix, &mbus_fmt);
 228         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 229         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 230         f->fmt.pix.bytesperline = 0;
 231         f->fmt.pix.priv = 0;
 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         struct v4l2_mbus_framefmt mbus_fmt;
 241
 242         v4l2_fill_mbus_format(&mbus_fmt, &f->fmt.pix, V4L2_MBUS_FMT_FIXED);
 243         saa_call_all(dev, video, s_mbus_fmt, &mbus_fmt);
 244         v4l2_fill_pix_format(&f->fmt.pix, &mbus_fmt);
 245
 246         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 247         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 248         f->fmt.pix.bytesperline = 0;
 249         f->fmt.pix.priv = 0;
 250
 251         return 0;
 252 }
 253
 254 static int empress_try_fmt_vid_cap(struct file *file, void *priv,
 255                                 struct v4l2_format *f)
 256 {
 257         struct saa7134_dev *dev = file->private_data;
 258         struct v4l2_mbus_framefmt mbus_fmt;
 259
 260         v4l2_fill_mbus_format(&mbus_fmt, &f->fmt.pix, V4L2_MBUS_FMT_FIXED);
 261         saa_call_all(dev, video, try_mbus_fmt, &mbus_fmt);
 262         v4l2_fill_pix_format(&f->fmt.pix, &mbus_fmt);
 263
 264         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 265         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 266         f->fmt.pix.bytesperline = 0;
 267         f->fmt.pix.priv = 0;
 268
 269         return 0;
 270 }
 271
 272 static int empress_reqbufs(struct file *file, void *priv,
 273                                         struct v4l2_requestbuffers *p)
 274 {
 275         struct saa7134_dev *dev = file->private_data;
 276
 277         return videobuf_reqbufs(&dev->empress_tsq, p);
 278 }
 279
 280 static int empress_querybuf(struct file *file, void *priv,
 281                                         struct v4l2_buffer *b)
 282 {
 283         struct saa7134_dev *dev = file->private_data;
 284
 285         return videobuf_querybuf(&dev->empress_tsq, b);
 286 }
 287
 288 static int empress_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
 289 {
 290         struct saa7134_dev *dev = file->private_data;
 291
 292         return videobuf_qbuf(&dev->empress_tsq, b);
 293 }
 294
 295 static int empress_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
 296 {
 297         struct saa7134_dev *dev = file->private_data;
 298
 299         return videobuf_dqbuf(&dev->empress_tsq, b,
 300                                 file->f_flags & O_NONBLOCK);
 301 }
 302
 303 static int empress_streamon(struct file *file, void *priv,
 304                                         enum v4l2_buf_type type)
 305 {
 306         struct saa7134_dev *dev = file->private_data;
 307
 308         return videobuf_streamon(&dev->empress_tsq);
 309 }
 310
 311 static int empress_streamoff(struct file *file, void *priv,
 312                                         enum v4l2_buf_type type)
 313 {
 314         struct saa7134_dev *dev = file->private_data;
 315
 316         return videobuf_streamoff(&dev->empress_tsq);
 317 }
 318
 319 static int empress_s_std(struct file *file, void *priv, v4l2_std_id id)
 320 {
 321         struct saa7134_dev *dev = file->private_data;
 322
 323         return saa7134_s_std_internal(dev, NULL, id);
 324 }
 325
 326 static int empress_g_std(struct file *file, void *priv, v4l2_std_id *id)
 327 {
 328         struct saa7134_dev *dev = file->private_data;
 329
 330         *id = dev->tvnorm->id;
 331         return 0;
 332 }
 333
 334 static const struct v4l2_file_operations ts_fops =
 335 {
 336         .owner    = THIS_MODULE,
 337         .open     = ts_open,
 338         .release  = ts_release,
 339         .read     = ts_read,
 340         .poll     = ts_poll,
 341         .mmap     = ts_mmap,
 342         .ioctl    = video_ioctl2,
 343 };
 344
 345 static const struct v4l2_ioctl_ops ts_ioctl_ops = {
 346         .vidioc_querycap                = empress_querycap,
 347         .vidioc_enum_fmt_vid_cap        = empress_enum_fmt_vid_cap,
 348         .vidioc_try_fmt_vid_cap         = empress_try_fmt_vid_cap,
 349         .vidioc_s_fmt_vid_cap           = empress_s_fmt_vid_cap,
 350         .vidioc_g_fmt_vid_cap           = empress_g_fmt_vid_cap,
 351         .vidioc_reqbufs                 = empress_reqbufs,
 352         .vidioc_querybuf                = empress_querybuf,
 353         .vidioc_qbuf                    = empress_qbuf,
 354         .vidioc_dqbuf                   = empress_dqbuf,
 355         .vidioc_streamon                = empress_streamon,
 356         .vidioc_streamoff               = empress_streamoff,
 357         .vidioc_enum_input              = empress_enum_input,
 358         .vidioc_g_input                 = empress_g_input,
 359         .vidioc_s_input                 = empress_s_input,
 360         .vidioc_s_std                   = empress_s_std,
 361         .vidioc_g_std                   = empress_g_std,
 362 };
 363
 364 /* ----------------------------------------------------------- */
 365
 366 static struct video_device saa7134_empress_template = {
 367         .name          = "saa7134-empress",
 368         .fops          = &ts_fops,
 369         .ioctl_ops     = &ts_ioctl_ops,
 370
 371         .tvnorms                        = SAA7134_NORMS,
 372 };
 373
 374 static void empress_signal_update(struct work_struct *work)
 375 {
 376         struct saa7134_dev* dev =
 377                 container_of(work, struct saa7134_dev, empress_workqueue);
 378
 379         if (dev->nosignal) {
 380                 dprintk("no video signal\n");
 381         } else {
 382                 dprintk("video signal acquired\n");
 383         }
 384 }
 385
 386 static void empress_signal_change(struct saa7134_dev *dev)
 387 {
 388         schedule_work(&dev->empress_workqueue);
 389 }
 390
 391 static bool empress_ctrl_filter(const struct v4l2_ctrl *ctrl)
 392 {
 393         switch (ctrl->id) {
 394         case V4L2_CID_BRIGHTNESS:
 395         case V4L2_CID_HUE:
 396         case V4L2_CID_CONTRAST:
 397         case V4L2_CID_SATURATION:
 398         case V4L2_CID_AUDIO_MUTE:
 399         case V4L2_CID_AUDIO_VOLUME:
 400         case V4L2_CID_PRIVATE_INVERT:
 401         case V4L2_CID_PRIVATE_AUTOMUTE:
 402                 return true;
 403         default:
 404                 return false;
 405         }
 406 }
 407
 408 static int empress_init(struct saa7134_dev *dev)
 409 {
 410         struct v4l2_ctrl_handler *hdl = &dev->empress_ctrl_handler;
 411         int err;
 412
 413         dprintk("%s: %s\n",dev->name,__func__);
 414         dev->empress_dev = video_device_alloc();
 415         if (NULL == dev->empress_dev)
 416                 return -ENOMEM;
 417         *(dev->empress_dev) = saa7134_empress_template;
 418         dev->empress_dev->v4l2_dev  = &dev->v4l2_dev;
 419         dev->empress_dev->release = video_device_release;
 420         snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
 421                  "%s empress (%s)", dev->name,
 422                  saa7134_boards[dev->board].name);
 423         v4l2_ctrl_handler_init(hdl, 21);
 424         v4l2_ctrl_add_handler(hdl, &dev->ctrl_handler, empress_ctrl_filter);
 425         if (dev->empress_sd)
 426                 v4l2_ctrl_add_handler(hdl, dev->empress_sd->ctrl_handler, NULL);
 427         if (hdl->error) {
 428                 video_device_release(dev->empress_dev);
 429                 return hdl->error;
 430         }
 431         dev->empress_dev->ctrl_handler = hdl;
 432
 433         INIT_WORK(&dev->empress_workqueue, empress_signal_update);
 434
 435         video_set_drvdata(dev->empress_dev, dev);
 436         err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
 437                                     empress_nr[dev->nr]);
 438         if (err < 0) {
 439                 printk(KERN_INFO "%s: can't register video device\n",
 440                        dev->name);
 441                 video_device_release(dev->empress_dev);
 442                 dev->empress_dev = NULL;
 443                 return err;
 444         }
 445         printk(KERN_INFO "%s: registered device %s [mpeg]\n",
 446                dev->name, video_device_node_name(dev->empress_dev));
 447
 448         videobuf_queue_sg_init(&dev->empress_tsq, &saa7134_ts_qops,
 449                             &dev->pci->dev, &dev->slock,
 450                             V4L2_BUF_TYPE_VIDEO_CAPTURE,
 451                             V4L2_FIELD_ALTERNATE,
 452                             sizeof(struct saa7134_buf),
 453                             dev, NULL);
 454
 455         empress_signal_update(&dev->empress_workqueue);
 456         return 0;
 457 }
 458
 459 static int empress_fini(struct saa7134_dev *dev)
 460 {
 461         dprintk("%s: %s\n",dev->name,__func__);
 462
 463         if (NULL == dev->empress_dev)
 464                 return 0;
 465         flush_work(&dev->empress_workqueue);
 466         video_unregister_device(dev->empress_dev);
 467         v4l2_ctrl_handler_free(&dev->empress_ctrl_handler);
 468         dev->empress_dev = NULL;
 469         return 0;
 470 }
 471
 472 static struct saa7134_mpeg_ops empress_ops = {
 473         .type          = SAA7134_MPEG_EMPRESS,
 474         .init          = empress_init,
 475         .fini          = empress_fini,
 476         .signal_change = empress_signal_change,
 477 };
 478
 479 static int __init empress_register(void)
 480 {
 481         return saa7134_ts_register(&empress_ops);
 482 }
 483
 484 static void __exit empress_unregister(void)
 485 {
 486         saa7134_ts_unregister(&empress_ops);
 487 }
 488
 489 module_init(empress_register);
 490 module_exit(empress_unregister);
 491
 492 /* ----------------------------------------------------------- */
 493 /*
 494  * Local variables:
 495  * c-basic-offset: 8
 496  * End:
 497  */