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;
  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.vb_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.vb_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         videobuf_stop(&dev->empress_tsq);
 114         videobuf_mmap_free(&dev->empress_tsq);
 115         dev->empress_users--;
 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         return 0;
 125 }
 126
 127 static ssize_t
 128 ts_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
 129 {
 130         struct saa7134_dev *dev = file->private_data;
 131
 132         if (!dev->empress_started)
 133                 ts_init_encoder(dev);
 134
 135         return videobuf_read_stream(&dev->empress_tsq,
 136                                     data, count, ppos, 0,
 137                                     file->f_flags & O_NONBLOCK);
 138 }
 139
 140 static unsigned int
 141 ts_poll(struct file *file, struct poll_table_struct *wait)
 142 {
 143         struct saa7134_dev *dev = file->private_data;
 144
 145         return videobuf_poll_stream(file, &dev->empress_tsq, wait);
 146 }
 147
 148
 149 static int
 150 ts_mmap(struct file *file, struct vm_area_struct * vma)
 151 {
 152         struct saa7134_dev *dev = file->private_data;
 153
 154         return videobuf_mmap_mapper(&dev->empress_tsq, vma);
 155 }
 156
 157 /*
 158  * This function is _not_ called directly, but from
 159  * video_generic_ioctl (and maybe others).  userspace
 160  * copying is done already, arg is a kernel pointer.
 161  */
 162
 163 static int empress_querycap(struct file *file, void  *priv,
 164                                         struct v4l2_capability *cap)
 165 {
 166         struct saa7134_dev *dev = file->private_data;
 167
 168         strcpy(cap->driver, "saa7134");
 169         strlcpy(cap->card, saa7134_boards[dev->board].name,
 170                 sizeof(cap->card));
 171         sprintf(cap->bus_info, "PCI:%s", pci_name(dev->pci));
 172         cap->version = SAA7134_VERSION_CODE;
 173         cap->capabilities =
 174                 V4L2_CAP_VIDEO_CAPTURE |
 175                 V4L2_CAP_READWRITE |
 176                 V4L2_CAP_STREAMING;
 177         return 0;
 178 }
 179
 180 static int empress_enum_input(struct file *file, void *priv,
 181                                         struct v4l2_input *i)
 182 {
 183         if (i->index != 0)
 184                 return -EINVAL;
 185
 186         i->type = V4L2_INPUT_TYPE_CAMERA;
 187         strcpy(i->name, "CCIR656");
 188
 189         return 0;
 190 }
 191
 192 static int empress_g_input(struct file *file, void *priv, unsigned int *i)
 193 {
 194         *i = 0;
 195         return 0;
 196 }
 197
 198 static int empress_s_input(struct file *file, void *priv, unsigned int i)
 199 {
 200         if (i != 0)
 201                 return -EINVAL;
 202
 203         return 0;
 204 }
 205
 206 static int empress_enum_fmt_cap(struct file *file, void  *priv,
 207                                         struct v4l2_fmtdesc *f)
 208 {
 209         if (f->index != 0)
 210                 return -EINVAL;
 211
 212         strlcpy(f->description, "MPEG TS", sizeof(f->description));
 213         f->pixelformat = V4L2_PIX_FMT_MPEG;
 214
 215         return 0;
 216 }
 217
 218 static int empress_g_fmt_cap(struct file *file, void *priv,
 219                                 struct v4l2_format *f)
 220 {
 221         struct saa7134_fh *fh = priv;
 222         struct saa7134_dev *dev = fh->dev;
 223
 224         saa7134_i2c_call_clients(dev, VIDIOC_G_FMT, f);
 225
 226         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 227         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 228
 229         return 0;
 230 }
 231
 232 static int empress_s_fmt_cap(struct file *file, void *priv,
 233                                 struct v4l2_format *f)
 234 {
 235         struct saa7134_fh *fh = priv;
 236         struct saa7134_dev *dev = fh->dev;
 237
 238         saa7134_i2c_call_clients(dev, VIDIOC_S_FMT, f);
 239
 240         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 241         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 242
 243         return 0;
 244 }
 245
 246
 247 static int empress_reqbufs(struct file *file, void *priv,
 248                                         struct v4l2_requestbuffers *p)
 249 {
 250         struct saa7134_fh *fh = priv;
 251         struct saa7134_dev *dev = fh->dev;
 252
 253         return videobuf_reqbufs(&dev->empress_tsq, p);
 254 }
 255
 256 static int empress_querybuf(struct file *file, void *priv,
 257                                         struct v4l2_buffer *b)
 258 {
 259         struct saa7134_fh *fh = priv;
 260         struct saa7134_dev *dev = fh->dev;
 261
 262         return videobuf_querybuf(&dev->empress_tsq, b);
 263 }
 264
 265 static int empress_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
 266 {
 267         struct saa7134_fh *fh = priv;
 268         struct saa7134_dev *dev = fh->dev;
 269
 270         return videobuf_qbuf(&dev->empress_tsq, b);
 271 }
 272
 273 static int empress_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
 274 {
 275         struct saa7134_fh *fh = priv;
 276         struct saa7134_dev *dev = fh->dev;
 277
 278         return videobuf_dqbuf(&dev->empress_tsq, b,
 279                                 file->f_flags & O_NONBLOCK);
 280 }
 281
 282 static int empress_streamon(struct file *file, void *priv,
 283                                         enum v4l2_buf_type type)
 284 {
 285         struct saa7134_fh *fh = priv;
 286         struct saa7134_dev *dev = fh->dev;
 287
 288         return videobuf_streamon(&dev->empress_tsq);
 289 }
 290
 291 static int empress_streamoff(struct file *file, void *priv,
 292                                         enum v4l2_buf_type type)
 293 {
 294         struct saa7134_fh *fh = priv;
 295         struct saa7134_dev *dev = fh->dev;
 296
 297         return videobuf_streamoff(&dev->empress_tsq);
 298 }
 299
 300 static int empress_s_ext_ctrls(struct file *file, void *priv,
 301                                struct v4l2_ext_controls *ctrls)
 302 {
 303         struct saa7134_fh *fh = priv;
 304         struct saa7134_dev *dev = fh->dev;
 305
 306         /* count == 0 is abused in saa6752hs.c, so that special
 307                 case is handled here explicitly. */
 308         if (ctrls->count == 0)
 309                 return 0;
 310
 311         if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 312                 return -EINVAL;
 313
 314         saa7134_i2c_call_clients(dev, VIDIOC_S_EXT_CTRLS, ctrls);
 315         ts_init_encoder(dev);
 316
 317         return 0;
 318 }
 319
 320 static int empress_g_ext_ctrls(struct file *file, void *priv,
 321                                struct v4l2_ext_controls *ctrls)
 322 {
 323         struct saa7134_fh *fh = priv;
 324         struct saa7134_dev *dev = fh->dev;
 325
 326         if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 327                 return -EINVAL;
 328         saa7134_i2c_call_clients(dev, VIDIOC_G_EXT_CTRLS, ctrls);
 329
 330         return 0;
 331 }
 332
 333 static const struct file_operations ts_fops =
 334 {
 335         .owner    = THIS_MODULE,
 336         .open     = ts_open,
 337         .release  = ts_release,
 338         .read     = ts_read,
 339         .poll     = ts_poll,
 340         .mmap     = ts_mmap,
 341         .ioctl    = video_ioctl2,
 342         .llseek   = no_llseek,
 343 };
 344
 345 /* ----------------------------------------------------------- */
 346
 347 static struct video_device saa7134_empress_template =
 348 {
 349         .name          = "saa7134-empress",
 350         .type          = 0 /* FIXME */,
 351         .type2         = 0 /* FIXME */,
 352         .fops          = &ts_fops,
 353         .minor         = -1,
 354
 355         .vidioc_querycap                = empress_querycap,
 356         .vidioc_enum_fmt_cap            = empress_enum_fmt_cap,
 357         .vidioc_s_fmt_cap               = empress_s_fmt_cap,
 358         .vidioc_g_fmt_cap               = empress_g_fmt_cap,
 359         .vidioc_reqbufs                 = empress_reqbufs,
 360         .vidioc_querybuf                = empress_querybuf,
 361         .vidioc_qbuf                    = empress_qbuf,
 362         .vidioc_dqbuf                   = empress_dqbuf,
 363         .vidioc_streamon                = empress_streamon,
 364         .vidioc_streamoff               = empress_streamoff,
 365         .vidioc_s_ext_ctrls             = empress_s_ext_ctrls,
 366         .vidioc_g_ext_ctrls             = empress_g_ext_ctrls,
 367         .vidioc_enum_input              = empress_enum_input,
 368         .vidioc_g_input                 = empress_g_input,
 369         .vidioc_s_input                 = empress_s_input,
 370
 371         .vidioc_queryctrl               = saa7134_queryctrl,
 372         .vidioc_g_ctrl                  = saa7134_g_ctrl,
 373         .vidioc_s_ctrl                  = saa7134_s_ctrl,
 374
 375         .tvnorms                        = SAA7134_NORMS,
 376         .current_norm                   = V4L2_STD_PAL,
 377 };
 378
 379 static void empress_signal_update(struct work_struct *work)
 380 {
 381         struct saa7134_dev* dev =
 382                 container_of(work, struct saa7134_dev, empress_workqueue);
 383
 384         if (dev->nosignal) {
 385                 dprintk("no video signal\n");
 386                 ts_reset_encoder(dev);
 387         } else {
 388                 dprintk("video signal acquired\n");
 389                 if (dev->empress_users)
 390                         ts_init_encoder(dev);
 391         }
 392 }
 393
 394 static void empress_signal_change(struct saa7134_dev *dev)
 395 {
 396         schedule_work(&dev->empress_workqueue);
 397 }
 398
 399
 400 static int empress_init(struct saa7134_dev *dev)
 401 {
 402         int err;
 403
 404         dprintk("%s: %s\n",dev->name,__func__);
 405         dev->empress_dev = video_device_alloc();
 406         if (NULL == dev->empress_dev)
 407                 return -ENOMEM;
 408         *(dev->empress_dev) = saa7134_empress_template;
 409         dev->empress_dev->dev     = &dev->pci->dev;
 410         dev->empress_dev->release = video_device_release;
 411         snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
 412                  "%s empress (%s)", dev->name,
 413                  saa7134_boards[dev->board].name);
 414
 415         INIT_WORK(&dev->empress_workqueue, empress_signal_update);
 416
 417         err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
 418                                     empress_nr[dev->nr]);
 419         if (err < 0) {
 420                 printk(KERN_INFO "%s: can't register video device\n",
 421                        dev->name);
 422                 video_device_release(dev->empress_dev);
 423                 dev->empress_dev = NULL;
 424                 return err;
 425         }
 426         printk(KERN_INFO "%s: registered device video%d [mpeg]\n",
 427                dev->name,dev->empress_dev->minor & 0x1f);
 428
 429         videobuf_queue_sg_init(&dev->empress_tsq, &saa7134_ts_qops,
 430                             &dev->pci->dev, &dev->slock,
 431                             V4L2_BUF_TYPE_VIDEO_CAPTURE,
 432                             V4L2_FIELD_ALTERNATE,
 433                             sizeof(struct saa7134_buf),
 434                             dev);
 435
 436         empress_signal_update(&dev->empress_workqueue);
 437         return 0;
 438 }
 439
 440 static int empress_fini(struct saa7134_dev *dev)
 441 {
 442         dprintk("%s: %s\n",dev->name,__func__);
 443
 444         if (NULL == dev->empress_dev)
 445                 return 0;
 446         flush_scheduled_work();
 447         video_unregister_device(dev->empress_dev);
 448         dev->empress_dev = NULL;
 449         return 0;
 450 }
 451
 452 static struct saa7134_mpeg_ops empress_ops = {
 453         .type          = SAA7134_MPEG_EMPRESS,
 454         .init          = empress_init,
 455         .fini          = empress_fini,
 456         .signal_change = empress_signal_change,
 457 };
 458
 459 static int __init empress_register(void)
 460 {
 461         return saa7134_ts_register(&empress_ops);
 462 }
 463
 464 static void __exit empress_unregister(void)
 465 {
 466         saa7134_ts_unregister(&empress_ops);
 467 }
 468
 469 module_init(empress_register);
 470 module_exit(empress_unregister);
 471
 472 /* ----------------------------------------------------------- */
 473 /*
 474  * Local variables:
 475  * c-basic-offset: 8
 476  * End:
 477  */