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 = 0;
  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 *h,*dev = NULL;
  80         struct list_head *list;
  81         int err;
  82
  83         list_for_each(list,&saa7134_devlist) {
  84                 h = list_entry(list, struct saa7134_dev, devlist);
  85                 if (h->empress_dev && h->empress_dev->minor == minor)
  86                         dev = h;
  87         }
  88         if (NULL == dev)
  89                 return -ENODEV;
  90
  91         dprintk("open minor=%d\n",minor);
  92         err = -EBUSY;
  93         if (!mutex_trylock(&dev->empress_tsq.lock))
  94                 goto done;
  95         if (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         dev->empress_users++;
 103         file->private_data = dev;
 104         err = 0;
 105
 106 done_up:
 107         mutex_unlock(&dev->empress_tsq.lock);
 108 done:
 109         return err;
 110 }
 111
 112 static int ts_release(struct inode *inode, struct file *file)
 113 {
 114         struct saa7134_dev *dev = file->private_data;
 115
 116         if (dev->empress_tsq.streaming)
 117                 videobuf_streamoff(&dev->empress_tsq);
 118         mutex_lock(&dev->empress_tsq.lock);
 119         if (dev->empress_tsq.reading)
 120                 videobuf_read_stop(&dev->empress_tsq);
 121         videobuf_mmap_free(&dev->empress_tsq);
 122         dev->empress_users--;
 123
 124         /* stop the encoder */
 125         ts_reset_encoder(dev);
 126
 127         /* Mute audio */
 128         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
 129                 saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6));
 130
 131         mutex_unlock(&dev->empress_tsq.lock);
 132         return 0;
 133 }
 134
 135 static ssize_t
 136 ts_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
 137 {
 138         struct saa7134_dev *dev = file->private_data;
 139
 140         if (!dev->empress_started)
 141                 ts_init_encoder(dev);
 142
 143         return videobuf_read_stream(&dev->empress_tsq,
 144                                     data, count, ppos, 0,
 145                                     file->f_flags & O_NONBLOCK);
 146 }
 147
 148 static unsigned int
 149 ts_poll(struct file *file, struct poll_table_struct *wait)
 150 {
 151         struct saa7134_dev *dev = file->private_data;
 152
 153         return videobuf_poll_stream(file, &dev->empress_tsq, wait);
 154 }
 155
 156
 157 static int
 158 ts_mmap(struct file *file, struct vm_area_struct * vma)
 159 {
 160         struct saa7134_dev *dev = file->private_data;
 161
 162         return videobuf_mmap_mapper(&dev->empress_tsq, vma);
 163 }
 164
 165 /*
 166  * This function is _not_ called directly, but from
 167  * video_generic_ioctl (and maybe others).  userspace
 168  * copying is done already, arg is a kernel pointer.
 169  */
 170 static int ts_do_ioctl(struct inode *inode, struct file *file,
 171                        unsigned int cmd, void *arg)
 172 {
 173         struct saa7134_dev *dev = file->private_data;
 174         struct v4l2_ext_controls *ctrls = arg;
 175
 176         if (debug > 1)
 177                 v4l_print_ioctl(dev->name,cmd);
 178         switch (cmd) {
 179         case VIDIOC_QUERYCAP:
 180         {
 181                 struct v4l2_capability *cap = arg;
 182
 183                 memset(cap,0,sizeof(*cap));
 184                 strcpy(cap->driver, "saa7134");
 185                 strlcpy(cap->card, saa7134_boards[dev->board].name,
 186                         sizeof(cap->card));
 187                 sprintf(cap->bus_info,"PCI:%s",pci_name(dev->pci));
 188                 cap->version = SAA7134_VERSION_CODE;
 189                 cap->capabilities =
 190                         V4L2_CAP_VIDEO_CAPTURE |
 191                         V4L2_CAP_READWRITE |
 192                         V4L2_CAP_STREAMING;
 193                 return 0;
 194         }
 195
 196         /* --- input switching --------------------------------------- */
 197         case VIDIOC_ENUMINPUT:
 198         {
 199                 struct v4l2_input *i = arg;
 200
 201                 if (i->index != 0)
 202                         return -EINVAL;
 203                 i->type = V4L2_INPUT_TYPE_CAMERA;
 204                 strcpy(i->name,"CCIR656");
 205                 return 0;
 206         }
 207         case VIDIOC_G_INPUT:
 208         {
 209                 int *i = arg;
 210                 *i = 0;
 211                 return 0;
 212         }
 213         case VIDIOC_S_INPUT:
 214         {
 215                 int *i = arg;
 216
 217                 if (*i != 0)
 218                         return -EINVAL;
 219                 return 0;
 220         }
 221         /* --- capture ioctls ---------------------------------------- */
 222
 223         case VIDIOC_ENUM_FMT:
 224         {
 225                 struct v4l2_fmtdesc *f = arg;
 226                 int index;
 227
 228                 index = f->index;
 229                 if (index != 0)
 230                         return -EINVAL;
 231
 232                 memset(f,0,sizeof(*f));
 233                 f->index = index;
 234                 strlcpy(f->description, "MPEG TS", sizeof(f->description));
 235                 f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 236                 f->pixelformat = V4L2_PIX_FMT_MPEG;
 237                 return 0;
 238         }
 239
 240         case VIDIOC_G_FMT:
 241         {
 242                 struct v4l2_format *f = arg;
 243
 244                 memset(f,0,sizeof(*f));
 245                 f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 246
 247                 saa7134_i2c_call_clients(dev, cmd, arg);
 248                 f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 249                 f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 250                 return 0;
 251         }
 252
 253         case VIDIOC_S_FMT:
 254         {
 255                 struct v4l2_format *f = arg;
 256
 257                 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 258                     return -EINVAL;
 259
 260                 saa7134_i2c_call_clients(dev, cmd, arg);
 261                 f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 262                 f->fmt.pix.sizeimage    = TS_PACKET_SIZE* dev->ts.nr_packets;
 263                 return 0;
 264         }
 265
 266         case VIDIOC_REQBUFS:
 267                 return videobuf_reqbufs(&dev->empress_tsq,arg);
 268
 269         case VIDIOC_QUERYBUF:
 270                 return videobuf_querybuf(&dev->empress_tsq,arg);
 271
 272         case VIDIOC_QBUF:
 273                 return videobuf_qbuf(&dev->empress_tsq,arg);
 274
 275         case VIDIOC_DQBUF:
 276                 return videobuf_dqbuf(&dev->empress_tsq,arg,
 277                                       file->f_flags & O_NONBLOCK);
 278
 279         case VIDIOC_STREAMON:
 280                 return videobuf_streamon(&dev->empress_tsq);
 281
 282         case VIDIOC_STREAMOFF:
 283                 return videobuf_streamoff(&dev->empress_tsq);
 284
 285         case VIDIOC_QUERYCTRL:
 286         case VIDIOC_G_CTRL:
 287         case VIDIOC_S_CTRL:
 288                 return saa7134_common_ioctl(dev, cmd, arg);
 289
 290         case VIDIOC_S_MPEGCOMP:
 291                 printk(KERN_WARNING "VIDIOC_S_MPEGCOMP is obsolete. "
 292                                     "Replace with VIDIOC_S_EXT_CTRLS!");
 293                 saa7134_i2c_call_clients(dev, VIDIOC_S_MPEGCOMP, arg);
 294                 ts_init_encoder(dev);
 295                 return 0;
 296         case VIDIOC_G_MPEGCOMP:
 297                 printk(KERN_WARNING "VIDIOC_G_MPEGCOMP is obsolete. "
 298                                     "Replace with VIDIOC_G_EXT_CTRLS!");
 299                 saa7134_i2c_call_clients(dev, VIDIOC_G_MPEGCOMP, arg);
 300                 return 0;
 301         case VIDIOC_S_EXT_CTRLS:
 302                 /* count == 0 is abused in saa6752hs.c, so that special
 303                    case is handled here explicitly. */
 304                 if (ctrls->count == 0)
 305                         return 0;
 306                 if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 307                         return -EINVAL;
 308                 saa7134_i2c_call_clients(dev, VIDIOC_S_EXT_CTRLS, arg);
 309                 ts_init_encoder(dev);
 310                 return 0;
 311         case VIDIOC_G_EXT_CTRLS:
 312                 if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 313                         return -EINVAL;
 314                 saa7134_i2c_call_clients(dev, VIDIOC_G_EXT_CTRLS, arg);
 315                 return 0;
 316
 317         default:
 318                 return -ENOIOCTLCMD;
 319         }
 320         return 0;
 321 }
 322
 323 static int ts_ioctl(struct inode *inode, struct file *file,
 324                      unsigned int cmd, unsigned long arg)
 325 {
 326         return video_usercopy(inode, file, cmd, arg, ts_do_ioctl);
 327 }
 328
 329 static const struct file_operations ts_fops =
 330 {
 331         .owner    = THIS_MODULE,
 332         .open     = ts_open,
 333         .release  = ts_release,
 334         .read     = ts_read,
 335         .poll     = ts_poll,
 336         .mmap     = ts_mmap,
 337         .ioctl    = ts_ioctl,
 338         .llseek   = no_llseek,
 339 };
 340
 341 /* ----------------------------------------------------------- */
 342
 343 static struct video_device saa7134_empress_template =
 344 {
 345         .name          = "saa7134-empress",
 346         .type          = 0 /* FIXME */,
 347         .type2         = 0 /* FIXME */,
 348         .hardware      = 0,
 349         .fops          = &ts_fops,
 350         .minor         = -1,
 351 };
 352
 353 static void empress_signal_update(struct work_struct *work)
 354 {
 355         struct saa7134_dev* dev =
 356                 container_of(work, struct saa7134_dev, empress_workqueue);
 357
 358         if (dev->nosignal) {
 359                 dprintk("no video signal\n");
 360                 ts_reset_encoder(dev);
 361         } else {
 362                 dprintk("video signal acquired\n");
 363                 if (dev->empress_users)
 364                         ts_init_encoder(dev);
 365         }
 366 }
 367
 368 static void empress_signal_change(struct saa7134_dev *dev)
 369 {
 370         schedule_work(&dev->empress_workqueue);
 371 }
 372
 373
 374 static int empress_init(struct saa7134_dev *dev)
 375 {
 376         int err;
 377
 378         dprintk("%s: %s\n",dev->name,__FUNCTION__);
 379         dev->empress_dev = video_device_alloc();
 380         if (NULL == dev->empress_dev)
 381                 return -ENOMEM;
 382         *(dev->empress_dev) = saa7134_empress_template;
 383         dev->empress_dev->dev     = &dev->pci->dev;
 384         dev->empress_dev->release = video_device_release;
 385         snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
 386                  "%s empress (%s)", dev->name,
 387                  saa7134_boards[dev->board].name);
 388
 389         INIT_WORK(&dev->empress_workqueue, empress_signal_update);
 390
 391         err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
 392                                     empress_nr[dev->nr]);
 393         if (err < 0) {
 394                 printk(KERN_INFO "%s: can't register video device\n",
 395                        dev->name);
 396                 video_device_release(dev->empress_dev);
 397                 dev->empress_dev = NULL;
 398                 return err;
 399         }
 400         printk(KERN_INFO "%s: registered device video%d [mpeg]\n",
 401                dev->name,dev->empress_dev->minor & 0x1f);
 402
 403         videobuf_queue_init(&dev->empress_tsq, &saa7134_ts_qops,
 404                             dev->pci, &dev->slock,
 405                             V4L2_BUF_TYPE_VIDEO_CAPTURE,
 406                             V4L2_FIELD_ALTERNATE,
 407                             sizeof(struct saa7134_buf),
 408                             dev);
 409
 410         empress_signal_update(&dev->empress_workqueue);
 411         return 0;
 412 }
 413
 414 static int empress_fini(struct saa7134_dev *dev)
 415 {
 416         dprintk("%s: %s\n",dev->name,__FUNCTION__);
 417
 418         if (NULL == dev->empress_dev)
 419                 return 0;
 420         flush_scheduled_work();
 421         video_unregister_device(dev->empress_dev);
 422         dev->empress_dev = NULL;
 423         return 0;
 424 }
 425
 426 static struct saa7134_mpeg_ops empress_ops = {
 427         .type          = SAA7134_MPEG_EMPRESS,
 428         .init          = empress_init,
 429         .fini          = empress_fini,
 430         .signal_change = empress_signal_change,
 431 };
 432
 433 static int __init empress_register(void)
 434 {
 435         return saa7134_ts_register(&empress_ops);
 436 }
 437
 438 static void __exit empress_unregister(void)
 439 {
 440         saa7134_ts_unregister(&empress_ops);
 441 }
 442
 443 module_init(empress_register);
 444 module_exit(empress_unregister);
 445
 446 /* ----------------------------------------------------------- */
 447 /*
 448  * Local variables:
 449  * c-basic-offset: 8
 450  * End:
 451  */