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 *dev;
  80         int err;
  81
  82         list_for_each_entry(dev, &saa7134_devlist, devlist)
  83                 if (dev->empress_dev && dev->empress_dev->minor == minor)
  84                         goto found;
  85         return -ENODEV;
  86  found:
  87
  88         dprintk("open minor=%d\n",minor);
  89         err = -EBUSY;
  90         if (!mutex_trylock(&dev->empress_tsq.lock))
  91                 goto done;
  92         if (dev->empress_users)
  93                 goto done_up;
  94
  95         /* Unmute audio */
  96         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
  97                 saa_readb(SAA7134_AUDIO_MUTE_CTRL) & ~(1 << 6));
  98
  99         dev->empress_users++;
 100         file->private_data = dev;
 101         err = 0;
 102
 103 done_up:
 104         mutex_unlock(&dev->empress_tsq.lock);
 105 done:
 106         return err;
 107 }
 108
 109 static int ts_release(struct inode *inode, struct file *file)
 110 {
 111         struct saa7134_dev *dev = file->private_data;
 112
 113         mutex_lock(&dev->empress_tsq.lock);
 114         videobuf_stop(&dev->empress_tsq);
 115         videobuf_mmap_free(&dev->empress_tsq);
 116         dev->empress_users--;
 117
 118         /* stop the encoder */
 119         ts_reset_encoder(dev);
 120
 121         /* Mute audio */
 122         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
 123                 saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6));
 124
 125         mutex_unlock(&dev->empress_tsq.lock);
 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 static int ts_do_ioctl(struct inode *inode, struct file *file,
 165                        unsigned int cmd, void *arg)
 166 {
 167         struct saa7134_dev *dev = file->private_data;
 168         struct v4l2_ext_controls *ctrls = arg;
 169
 170         if (debug > 1)
 171                 v4l_print_ioctl(dev->name,cmd);
 172         switch (cmd) {
 173         case VIDIOC_QUERYCAP:
 174         {
 175                 struct v4l2_capability *cap = arg;
 176
 177                 memset(cap,0,sizeof(*cap));
 178                 strcpy(cap->driver, "saa7134");
 179                 strlcpy(cap->card, saa7134_boards[dev->board].name,
 180                         sizeof(cap->card));
 181                 sprintf(cap->bus_info,"PCI:%s",pci_name(dev->pci));
 182                 cap->version = SAA7134_VERSION_CODE;
 183                 cap->capabilities =
 184                         V4L2_CAP_VIDEO_CAPTURE |
 185                         V4L2_CAP_READWRITE |
 186                         V4L2_CAP_STREAMING;
 187                 return 0;
 188         }
 189
 190         /* --- input switching --------------------------------------- */
 191         case VIDIOC_ENUMINPUT:
 192         {
 193                 struct v4l2_input *i = arg;
 194
 195                 if (i->index != 0)
 196                         return -EINVAL;
 197                 i->type = V4L2_INPUT_TYPE_CAMERA;
 198                 strcpy(i->name,"CCIR656");
 199                 return 0;
 200         }
 201         case VIDIOC_G_INPUT:
 202         {
 203                 int *i = arg;
 204                 *i = 0;
 205                 return 0;
 206         }
 207         case VIDIOC_S_INPUT:
 208         {
 209                 int *i = arg;
 210
 211                 if (*i != 0)
 212                         return -EINVAL;
 213                 return 0;
 214         }
 215         /* --- capture ioctls ---------------------------------------- */
 216
 217         case VIDIOC_ENUM_FMT:
 218         {
 219                 struct v4l2_fmtdesc *f = arg;
 220                 int index;
 221
 222                 index = f->index;
 223                 if (index != 0)
 224                         return -EINVAL;
 225
 226                 memset(f,0,sizeof(*f));
 227                 f->index = index;
 228                 strlcpy(f->description, "MPEG TS", sizeof(f->description));
 229                 f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 230                 f->pixelformat = V4L2_PIX_FMT_MPEG;
 231                 return 0;
 232         }
 233
 234         case VIDIOC_G_FMT:
 235         {
 236                 struct v4l2_format *f = arg;
 237
 238                 memset(f,0,sizeof(*f));
 239                 f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 240
 241                 saa7134_i2c_call_clients(dev, cmd, arg);
 242                 f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 243                 f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 244                 return 0;
 245         }
 246
 247         case VIDIOC_S_FMT:
 248         {
 249                 struct v4l2_format *f = arg;
 250
 251                 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 252                     return -EINVAL;
 253
 254                 saa7134_i2c_call_clients(dev, cmd, arg);
 255                 f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 256                 f->fmt.pix.sizeimage    = TS_PACKET_SIZE* dev->ts.nr_packets;
 257                 return 0;
 258         }
 259
 260         case VIDIOC_REQBUFS:
 261                 return videobuf_reqbufs(&dev->empress_tsq,arg);
 262
 263         case VIDIOC_QUERYBUF:
 264                 return videobuf_querybuf(&dev->empress_tsq,arg);
 265
 266         case VIDIOC_QBUF:
 267                 return videobuf_qbuf(&dev->empress_tsq,arg);
 268
 269         case VIDIOC_DQBUF:
 270                 return videobuf_dqbuf(&dev->empress_tsq,arg,
 271                                       file->f_flags & O_NONBLOCK);
 272
 273         case VIDIOC_STREAMON:
 274                 return videobuf_streamon(&dev->empress_tsq);
 275
 276         case VIDIOC_STREAMOFF:
 277                 return videobuf_streamoff(&dev->empress_tsq);
 278
 279         case VIDIOC_QUERYCTRL:
 280         case VIDIOC_G_CTRL:
 281         case VIDIOC_S_CTRL:
 282                 return saa7134_common_ioctl(dev, cmd, arg);
 283
 284         case VIDIOC_S_EXT_CTRLS:
 285                 /* count == 0 is abused in saa6752hs.c, so that special
 286                    case is handled here explicitly. */
 287                 if (ctrls->count == 0)
 288                         return 0;
 289                 if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 290                         return -EINVAL;
 291                 saa7134_i2c_call_clients(dev, VIDIOC_S_EXT_CTRLS, arg);
 292                 ts_init_encoder(dev);
 293                 return 0;
 294         case VIDIOC_G_EXT_CTRLS:
 295                 if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 296                         return -EINVAL;
 297                 saa7134_i2c_call_clients(dev, VIDIOC_G_EXT_CTRLS, arg);
 298                 return 0;
 299
 300         default:
 301                 return -ENOIOCTLCMD;
 302         }
 303         return 0;
 304 }
 305
 306 static int ts_ioctl(struct inode *inode, struct file *file,
 307                      unsigned int cmd, unsigned long arg)
 308 {
 309         return video_usercopy(inode, file, cmd, arg, ts_do_ioctl);
 310 }
 311
 312 static const struct file_operations ts_fops =
 313 {
 314         .owner    = THIS_MODULE,
 315         .open     = ts_open,
 316         .release  = ts_release,
 317         .read     = ts_read,
 318         .poll     = ts_poll,
 319         .mmap     = ts_mmap,
 320         .ioctl    = ts_ioctl,
 321         .llseek   = no_llseek,
 322 };
 323
 324 /* ----------------------------------------------------------- */
 325
 326 static struct video_device saa7134_empress_template =
 327 {
 328         .name          = "saa7134-empress",
 329         .type          = 0 /* FIXME */,
 330         .type2         = 0 /* FIXME */,
 331         .fops          = &ts_fops,
 332         .minor         = -1,
 333 };
 334
 335 static void empress_signal_update(struct work_struct *work)
 336 {
 337         struct saa7134_dev* dev =
 338                 container_of(work, struct saa7134_dev, empress_workqueue);
 339
 340         if (dev->nosignal) {
 341                 dprintk("no video signal\n");
 342                 ts_reset_encoder(dev);
 343         } else {
 344                 dprintk("video signal acquired\n");
 345                 if (dev->empress_users)
 346                         ts_init_encoder(dev);
 347         }
 348 }
 349
 350 static void empress_signal_change(struct saa7134_dev *dev)
 351 {
 352         schedule_work(&dev->empress_workqueue);
 353 }
 354
 355
 356 static int empress_init(struct saa7134_dev *dev)
 357 {
 358         int err;
 359
 360         dprintk("%s: %s\n",dev->name,__FUNCTION__);
 361         dev->empress_dev = video_device_alloc();
 362         if (NULL == dev->empress_dev)
 363                 return -ENOMEM;
 364         *(dev->empress_dev) = saa7134_empress_template;
 365         dev->empress_dev->dev     = &dev->pci->dev;
 366         dev->empress_dev->release = video_device_release;
 367         snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
 368                  "%s empress (%s)", dev->name,
 369                  saa7134_boards[dev->board].name);
 370
 371         INIT_WORK(&dev->empress_workqueue, empress_signal_update);
 372
 373         err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
 374                                     empress_nr[dev->nr]);
 375         if (err < 0) {
 376                 printk(KERN_INFO "%s: can't register video device\n",
 377                        dev->name);
 378                 video_device_release(dev->empress_dev);
 379                 dev->empress_dev = NULL;
 380                 return err;
 381         }
 382         printk(KERN_INFO "%s: registered device video%d [mpeg]\n",
 383                dev->name,dev->empress_dev->minor & 0x1f);
 384
 385         videobuf_queue_pci_init(&dev->empress_tsq, &saa7134_ts_qops,
 386                             dev->pci, &dev->slock,
 387                             V4L2_BUF_TYPE_VIDEO_CAPTURE,
 388                             V4L2_FIELD_ALTERNATE,
 389                             sizeof(struct saa7134_buf),
 390                             dev);
 391
 392         empress_signal_update(&dev->empress_workqueue);
 393         return 0;
 394 }
 395
 396 static int empress_fini(struct saa7134_dev *dev)
 397 {
 398         dprintk("%s: %s\n",dev->name,__FUNCTION__);
 399
 400         if (NULL == dev->empress_dev)
 401                 return 0;
 402         flush_scheduled_work();
 403         video_unregister_device(dev->empress_dev);
 404         dev->empress_dev = NULL;
 405         return 0;
 406 }
 407
 408 static struct saa7134_mpeg_ops empress_ops = {
 409         .type          = SAA7134_MPEG_EMPRESS,
 410         .init          = empress_init,
 411         .fini          = empress_fini,
 412         .signal_change = empress_signal_change,
 413 };
 414
 415 static int __init empress_register(void)
 416 {
 417         return saa7134_ts_register(&empress_ops);
 418 }
 419
 420 static void __exit empress_unregister(void)
 421 {
 422         saa7134_ts_unregister(&empress_ops);
 423 }
 424
 425 module_init(empress_register);
 426 module_exit(empress_unregister);
 427
 428 /* ----------------------------------------------------------- */
 429 /*
 430  * Local variables:
 431  * c-basic-offset: 8
 432  * End:
 433  */