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 <<<<<<< HEAD:drivers/media/video/saa7134/saa7134-empress.c
  91         if (!mutex_trylock(&dev->empress_tsq.lock))
  92 =======
  93         if (!mutex_trylock(&dev->empress_tsq.vb_lock))
  94 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/media/video/saa7134/saa7134-empress.c
  95                 goto done;
  96         if (dev->empress_users)
  97                 goto done_up;
  98
  99         /* Unmute audio */
 100         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
 101                 saa_readb(SAA7134_AUDIO_MUTE_CTRL) & ~(1 << 6));
 102
 103         dev->empress_users++;
 104         file->private_data = dev;
 105         err = 0;
 106
 107 done_up:
 108 <<<<<<< HEAD:drivers/media/video/saa7134/saa7134-empress.c
 109         mutex_unlock(&dev->empress_tsq.lock);
 110 =======
 111         mutex_unlock(&dev->empress_tsq.vb_lock);
 112 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/media/video/saa7134/saa7134-empress.c
 113 done:
 114         return err;
 115 }
 116
 117 static int ts_release(struct inode *inode, struct file *file)
 118 {
 119         struct saa7134_dev *dev = file->private_data;
 120
 121 <<<<<<< HEAD:drivers/media/video/saa7134/saa7134-empress.c
 122         mutex_lock(&dev->empress_tsq.lock);
 123 =======
 124 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/media/video/saa7134/saa7134-empress.c
 125         videobuf_stop(&dev->empress_tsq);
 126         videobuf_mmap_free(&dev->empress_tsq);
 127         dev->empress_users--;
 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 <<<<<<< HEAD:drivers/media/video/saa7134/saa7134-empress.c
 137         mutex_unlock(&dev->empress_tsq.lock);
 138 =======
 139 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:drivers/media/video/saa7134/saa7134-empress.c
 140         return 0;
 141 }
 142
 143 static ssize_t
 144 ts_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
 145 {
 146         struct saa7134_dev *dev = file->private_data;
 147
 148         if (!dev->empress_started)
 149                 ts_init_encoder(dev);
 150
 151         return videobuf_read_stream(&dev->empress_tsq,
 152                                     data, count, ppos, 0,
 153                                     file->f_flags & O_NONBLOCK);
 154 }
 155
 156 static unsigned int
 157 ts_poll(struct file *file, struct poll_table_struct *wait)
 158 {
 159         struct saa7134_dev *dev = file->private_data;
 160
 161         return videobuf_poll_stream(file, &dev->empress_tsq, wait);
 162 }
 163
 164
 165 static int
 166 ts_mmap(struct file *file, struct vm_area_struct * vma)
 167 {
 168         struct saa7134_dev *dev = file->private_data;
 169
 170         return videobuf_mmap_mapper(&dev->empress_tsq, vma);
 171 }
 172
 173 /*
 174  * This function is _not_ called directly, but from
 175  * video_generic_ioctl (and maybe others).  userspace
 176  * copying is done already, arg is a kernel pointer.
 177  */
 178
 179 static int empress_querycap(struct file *file, void  *priv,
 180                                         struct v4l2_capability *cap)
 181 {
 182         struct saa7134_fh *fh = priv;
 183         struct saa7134_dev *dev = fh->dev;
 184
 185         strcpy(cap->driver, "saa7134");
 186         strlcpy(cap->card, saa7134_boards[dev->board].name,
 187                 sizeof(cap->card));
 188         sprintf(cap->bus_info, "PCI:%s", pci_name(dev->pci));
 189         cap->version = SAA7134_VERSION_CODE;
 190         cap->capabilities =
 191                 V4L2_CAP_VIDEO_CAPTURE |
 192                 V4L2_CAP_READWRITE |
 193                 V4L2_CAP_STREAMING;
 194         return 0;
 195 }
 196
 197 static int empress_enum_input(struct file *file, void *priv,
 198                                         struct v4l2_input *i)
 199 {
 200         if (i->index != 0)
 201                 return -EINVAL;
 202
 203         i->type = V4L2_INPUT_TYPE_CAMERA;
 204         strcpy(i->name, "CCIR656");
 205
 206         return 0;
 207 }
 208
 209 static int empress_g_input(struct file *file, void *priv, unsigned int *i)
 210 {
 211         *i = 0;
 212         return 0;
 213 }
 214
 215 static int empress_s_input(struct file *file, void *priv, unsigned int i)
 216 {
 217         if (i != 0)
 218                 return -EINVAL;
 219
 220         return 0;
 221 }
 222
 223 static int empress_enum_fmt_cap(struct file *file, void  *priv,
 224                                         struct v4l2_fmtdesc *f)
 225 {
 226         if (f->index != 0)
 227                 return -EINVAL;
 228
 229         strlcpy(f->description, "MPEG TS", sizeof(f->description));
 230         f->pixelformat = V4L2_PIX_FMT_MPEG;
 231
 232         return 0;
 233 }
 234
 235 static int empress_g_fmt_cap(struct file *file, void *priv,
 236                                 struct v4l2_format *f)
 237 {
 238         struct saa7134_fh *fh = priv;
 239         struct saa7134_dev *dev = fh->dev;
 240
 241         saa7134_i2c_call_clients(dev, VIDIOC_G_FMT, f);
 242
 243         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 244         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 245
 246         return 0;
 247 }
 248
 249 static int empress_s_fmt_cap(struct file *file, void *priv,
 250                                 struct v4l2_format *f)
 251 {
 252         struct saa7134_fh *fh = priv;
 253         struct saa7134_dev *dev = fh->dev;
 254
 255         saa7134_i2c_call_clients(dev, VIDIOC_S_FMT, f);
 256
 257         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 258         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 259
 260         return 0;
 261 }
 262
 263
 264 static int empress_reqbufs(struct file *file, void *priv,
 265                                         struct v4l2_requestbuffers *p)
 266 {
 267         struct saa7134_fh *fh = priv;
 268         struct saa7134_dev *dev = fh->dev;
 269
 270         return videobuf_reqbufs(&dev->empress_tsq, p);
 271 }
 272
 273 static int empress_querybuf(struct file *file, void *priv,
 274                                         struct v4l2_buffer *b)
 275 {
 276         struct saa7134_fh *fh = priv;
 277         struct saa7134_dev *dev = fh->dev;
 278
 279         return videobuf_querybuf(&dev->empress_tsq, b);
 280 }
 281
 282 static int empress_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
 283 {
 284         struct saa7134_fh *fh = priv;
 285         struct saa7134_dev *dev = fh->dev;
 286
 287         return videobuf_qbuf(&dev->empress_tsq, b);
 288 }
 289
 290 static int empress_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
 291 {
 292         struct saa7134_fh *fh = priv;
 293         struct saa7134_dev *dev = fh->dev;
 294
 295         return videobuf_dqbuf(&dev->empress_tsq, b,
 296                                 file->f_flags & O_NONBLOCK);
 297 }
 298
 299 static int empress_streamon(struct file *file, void *priv,
 300                                         enum v4l2_buf_type type)
 301 {
 302         struct saa7134_fh *fh = priv;
 303         struct saa7134_dev *dev = fh->dev;
 304
 305         return videobuf_streamon(&dev->empress_tsq);
 306 }
 307
 308 static int empress_streamoff(struct file *file, void *priv,
 309                                         enum v4l2_buf_type type)
 310 {
 311         struct saa7134_fh *fh = priv;
 312         struct saa7134_dev *dev = fh->dev;
 313
 314         return videobuf_streamoff(&dev->empress_tsq);
 315 }
 316
 317 static int empress_s_ext_ctrls(struct file *file, void *priv,
 318                                struct v4l2_ext_controls *ctrls)
 319 {
 320         struct saa7134_fh *fh = priv;
 321         struct saa7134_dev *dev = fh->dev;
 322
 323         /* count == 0 is abused in saa6752hs.c, so that special
 324                 case is handled here explicitly. */
 325         if (ctrls->count == 0)
 326                 return 0;
 327
 328         if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 329                 return -EINVAL;
 330
 331         saa7134_i2c_call_clients(dev, VIDIOC_S_EXT_CTRLS, ctrls);
 332         ts_init_encoder(dev);
 333
 334         return 0;
 335 }
 336
 337 static int empress_g_ext_ctrls(struct file *file, void *priv,
 338                                struct v4l2_ext_controls *ctrls)
 339 {
 340         struct saa7134_fh *fh = priv;
 341         struct saa7134_dev *dev = fh->dev;
 342
 343         if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 344                 return -EINVAL;
 345         saa7134_i2c_call_clients(dev, VIDIOC_G_EXT_CTRLS, ctrls);
 346
 347         return 0;
 348 }
 349
 350 static const struct file_operations ts_fops =
 351 {
 352         .owner    = THIS_MODULE,
 353         .open     = ts_open,
 354         .release  = ts_release,
 355         .read     = ts_read,
 356         .poll     = ts_poll,
 357         .mmap     = ts_mmap,
 358         .ioctl    = video_ioctl2,
 359         .llseek   = no_llseek,
 360 };
 361
 362 /* ----------------------------------------------------------- */
 363
 364 static struct video_device saa7134_empress_template =
 365 {
 366         .name          = "saa7134-empress",
 367         .type          = 0 /* FIXME */,
 368         .type2         = 0 /* FIXME */,
 369         .fops          = &ts_fops,
 370         .minor         = -1,
 371
 372         .vidioc_querycap                = empress_querycap,
 373         .vidioc_enum_fmt_cap            = empress_enum_fmt_cap,
 374         .vidioc_s_fmt_cap               = empress_s_fmt_cap,
 375         .vidioc_g_fmt_cap               = empress_g_fmt_cap,
 376         .vidioc_reqbufs                 = empress_reqbufs,
 377         .vidioc_querybuf                = empress_querybuf,
 378         .vidioc_qbuf                    = empress_qbuf,
 379         .vidioc_dqbuf                   = empress_dqbuf,
 380         .vidioc_streamon                = empress_streamon,
 381         .vidioc_streamoff               = empress_streamoff,
 382         .vidioc_s_ext_ctrls             = empress_s_ext_ctrls,
 383         .vidioc_g_ext_ctrls             = empress_g_ext_ctrls,
 384         .vidioc_enum_input              = empress_enum_input,
 385         .vidioc_g_input                 = empress_g_input,
 386         .vidioc_s_input                 = empress_s_input,
 387
 388         .vidioc_queryctrl               = saa7134_queryctrl,
 389         .vidioc_g_ctrl                  = saa7134_g_ctrl,
 390         .vidioc_s_ctrl                  = saa7134_s_ctrl,
 391
 392         .tvnorms                        = SAA7134_NORMS,
 393         .current_norm                   = V4L2_STD_PAL,
 394 };
 395
 396 static void empress_signal_update(struct work_struct *work)
 397 {
 398         struct saa7134_dev* dev =
 399                 container_of(work, struct saa7134_dev, empress_workqueue);
 400
 401         if (dev->nosignal) {
 402                 dprintk("no video signal\n");
 403                 ts_reset_encoder(dev);
 404         } else {
 405                 dprintk("video signal acquired\n");
 406                 if (dev->empress_users)
 407                         ts_init_encoder(dev);
 408         }
 409 }
 410
 411 static void empress_signal_change(struct saa7134_dev *dev)
 412 {
 413         schedule_work(&dev->empress_workqueue);
 414 }
 415
 416
 417 static int empress_init(struct saa7134_dev *dev)
 418 {
 419         int err;
 420
 421         dprintk("%s: %s\n",dev->name,__FUNCTION__);
 422         dev->empress_dev = video_device_alloc();
 423         if (NULL == dev->empress_dev)
 424                 return -ENOMEM;
 425         *(dev->empress_dev) = saa7134_empress_template;
 426         dev->empress_dev->dev     = &dev->pci->dev;
 427         dev->empress_dev->release = video_device_release;
 428         snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
 429                  "%s empress (%s)", dev->name,
 430                  saa7134_boards[dev->board].name);
 431
 432         INIT_WORK(&dev->empress_workqueue, empress_signal_update);
 433
 434         err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
 435                                     empress_nr[dev->nr]);
 436         if (err < 0) {
 437                 printk(KERN_INFO "%s: can't register video device\n",
 438                        dev->name);
 439                 video_device_release(dev->empress_dev);
 440                 dev->empress_dev = NULL;
 441                 return err;
 442         }
 443         printk(KERN_INFO "%s: registered device video%d [mpeg]\n",
 444                dev->name,dev->empress_dev->minor & 0x1f);
 445
 446         videobuf_queue_pci_init(&dev->empress_tsq, &saa7134_ts_qops,
 447                             dev->pci, &dev->slock,
 448                             V4L2_BUF_TYPE_VIDEO_CAPTURE,
 449                             V4L2_FIELD_ALTERNATE,
 450                             sizeof(struct saa7134_buf),
 451                             dev);
 452
 453         empress_signal_update(&dev->empress_workqueue);
 454         return 0;
 455 }
 456
 457 static int empress_fini(struct saa7134_dev *dev)
 458 {
 459         dprintk("%s: %s\n",dev->name,__FUNCTION__);
 460
 461         if (NULL == dev->empress_dev)
 462                 return 0;
 463         flush_scheduled_work();
 464         video_unregister_device(dev->empress_dev);
 465         dev->empress_dev = NULL;
 466         return 0;
 467 }
 468
 469 static struct saa7134_mpeg_ops empress_ops = {
 470         .type          = SAA7134_MPEG_EMPRESS,
 471         .init          = empress_init,
 472         .fini          = empress_fini,
 473         .signal_change = empress_signal_change,
 474 };
 475
 476 static int __init empress_register(void)
 477 {
 478         return saa7134_ts_register(&empress_ops);
 479 }
 480
 481 static void __exit empress_unregister(void)
 482 {
 483         saa7134_ts_unregister(&empress_ops);
 484 }
 485
 486 module_init(empress_register);
 487 module_exit(empress_unregister);
 488
 489 /* ----------------------------------------------------------- */
 490 /*
 491  * Local variables:
 492  * c-basic-offset: 8
 493  * End:
 494  */