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
 165 static int empress_querycap(struct file *file, void  *priv,
 166                                         struct v4l2_capability *cap)
 167 {
 168         struct saa7134_fh *fh = priv;
 169         struct saa7134_dev *dev = fh->dev;
 170
 171         strcpy(cap->driver, "saa7134");
 172         strlcpy(cap->card, saa7134_boards[dev->board].name,
 173                 sizeof(cap->card));
 174         sprintf(cap->bus_info, "PCI:%s", pci_name(dev->pci));
 175         cap->version = SAA7134_VERSION_CODE;
 176         cap->capabilities =
 177                 V4L2_CAP_VIDEO_CAPTURE |
 178                 V4L2_CAP_READWRITE |
 179                 V4L2_CAP_STREAMING;
 180         return 0;
 181 }
 182
 183 static int empress_enum_input(struct file *file, void *priv,
 184                                         struct v4l2_input *i)
 185 {
 186         if (i->index != 0)
 187                 return -EINVAL;
 188
 189         i->type = V4L2_INPUT_TYPE_CAMERA;
 190         strcpy(i->name, "CCIR656");
 191
 192         return 0;
 193 }
 194
 195 static int empress_g_input(struct file *file, void *priv, unsigned int *i)
 196 {
 197         *i = 0;
 198         return 0;
 199 }
 200
 201 static int empress_s_input(struct file *file, void *priv, unsigned int i)
 202 {
 203         if (i != 0)
 204                 return -EINVAL;
 205
 206         return 0;
 207 }
 208
 209 static int empress_enum_fmt_cap(struct file *file, void  *priv,
 210                                         struct v4l2_fmtdesc *f)
 211 {
 212         if (f->index != 0)
 213                 return -EINVAL;
 214
 215         strlcpy(f->description, "MPEG TS", sizeof(f->description));
 216         f->pixelformat = V4L2_PIX_FMT_MPEG;
 217
 218         return 0;
 219 }
 220
 221 static int empress_g_fmt_cap(struct file *file, void *priv,
 222                                 struct v4l2_format *f)
 223 {
 224         struct saa7134_fh *fh = priv;
 225         struct saa7134_dev *dev = fh->dev;
 226
 227         saa7134_i2c_call_clients(dev, VIDIOC_G_FMT, f);
 228
 229         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 230         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 231
 232         return 0;
 233 }
 234
 235 static int empress_s_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_S_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
 250 static int empress_reqbufs(struct file *file, void *priv,
 251                                         struct v4l2_requestbuffers *p)
 252 {
 253         struct saa7134_fh *fh = priv;
 254         struct saa7134_dev *dev = fh->dev;
 255
 256         return videobuf_reqbufs(&dev->empress_tsq, p);
 257 }
 258
 259 static int empress_querybuf(struct file *file, void *priv,
 260                                         struct v4l2_buffer *b)
 261 {
 262         struct saa7134_fh *fh = priv;
 263         struct saa7134_dev *dev = fh->dev;
 264
 265         return videobuf_querybuf(&dev->empress_tsq, b);
 266 }
 267
 268 static int empress_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
 269 {
 270         struct saa7134_fh *fh = priv;
 271         struct saa7134_dev *dev = fh->dev;
 272
 273         return videobuf_qbuf(&dev->empress_tsq, b);
 274 }
 275
 276 static int empress_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
 277 {
 278         struct saa7134_fh *fh = priv;
 279         struct saa7134_dev *dev = fh->dev;
 280
 281         return videobuf_dqbuf(&dev->empress_tsq, b,
 282                                 file->f_flags & O_NONBLOCK);
 283 }
 284
 285 static int empress_streamon(struct file *file, void *priv,
 286                                         enum v4l2_buf_type type)
 287 {
 288         struct saa7134_fh *fh = priv;
 289         struct saa7134_dev *dev = fh->dev;
 290
 291         return videobuf_streamon(&dev->empress_tsq);
 292 }
 293
 294 static int empress_streamoff(struct file *file, void *priv,
 295                                         enum v4l2_buf_type type)
 296 {
 297         struct saa7134_fh *fh = priv;
 298         struct saa7134_dev *dev = fh->dev;
 299
 300         return videobuf_streamoff(&dev->empress_tsq);
 301 }
 302
 303 static int empress_s_ext_ctrls(struct file *file, void *priv,
 304                                struct v4l2_ext_controls *ctrls)
 305 {
 306         struct saa7134_fh *fh = priv;
 307         struct saa7134_dev *dev = fh->dev;
 308
 309         /* count == 0 is abused in saa6752hs.c, so that special
 310                 case is handled here explicitly. */
 311         if (ctrls->count == 0)
 312                 return 0;
 313
 314         if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 315                 return -EINVAL;
 316
 317         saa7134_i2c_call_clients(dev, VIDIOC_S_EXT_CTRLS, ctrls);
 318         ts_init_encoder(dev);
 319
 320         return 0;
 321 }
 322
 323 static int empress_g_ext_ctrls(struct file *file, void *priv,
 324                                struct v4l2_ext_controls *ctrls)
 325 {
 326         struct saa7134_fh *fh = priv;
 327         struct saa7134_dev *dev = fh->dev;
 328
 329         if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 330                 return -EINVAL;
 331         saa7134_i2c_call_clients(dev, VIDIOC_G_EXT_CTRLS, ctrls);
 332
 333         return 0;
 334 }
 335
 336 static const struct file_operations ts_fops =
 337 {
 338         .owner    = THIS_MODULE,
 339         .open     = ts_open,
 340         .release  = ts_release,
 341         .read     = ts_read,
 342         .poll     = ts_poll,
 343         .mmap     = ts_mmap,
 344         .ioctl    = video_ioctl2,
 345         .llseek   = no_llseek,
 346 };
 347
 348 /* ----------------------------------------------------------- */
 349
 350 static struct video_device saa7134_empress_template =
 351 {
 352         .name          = "saa7134-empress",
 353         .type          = 0 /* FIXME */,
 354         .type2         = 0 /* FIXME */,
 355         .fops          = &ts_fops,
 356         .minor         = -1,
 357
 358         .vidioc_querycap                = empress_querycap,
 359         .vidioc_enum_fmt_cap            = empress_enum_fmt_cap,
 360         .vidioc_s_fmt_cap               = empress_s_fmt_cap,
 361         .vidioc_g_fmt_cap               = empress_g_fmt_cap,
 362         .vidioc_reqbufs                 = empress_reqbufs,
 363         .vidioc_querybuf                = empress_querybuf,
 364         .vidioc_qbuf                    = empress_qbuf,
 365         .vidioc_dqbuf                   = empress_dqbuf,
 366         .vidioc_streamon                = empress_streamon,
 367         .vidioc_streamoff               = empress_streamoff,
 368         .vidioc_s_ext_ctrls             = empress_s_ext_ctrls,
 369         .vidioc_g_ext_ctrls             = empress_g_ext_ctrls,
 370         .vidioc_enum_input              = empress_enum_input,
 371         .vidioc_g_input                 = empress_g_input,
 372         .vidioc_s_input                 = empress_s_input,
 373
 374         .vidioc_queryctrl               = saa7134_queryctrl,
 375         .vidioc_g_ctrl                  = saa7134_g_ctrl,
 376         .vidioc_s_ctrl                  = saa7134_s_ctrl,
 377
 378         .tvnorms                        = SAA7134_NORMS,
 379         .current_norm                   = V4L2_STD_PAL,
 380 };
 381
 382 static void empress_signal_update(struct work_struct *work)
 383 {
 384         struct saa7134_dev* dev =
 385                 container_of(work, struct saa7134_dev, empress_workqueue);
 386
 387         if (dev->nosignal) {
 388                 dprintk("no video signal\n");
 389                 ts_reset_encoder(dev);
 390         } else {
 391                 dprintk("video signal acquired\n");
 392                 if (dev->empress_users)
 393                         ts_init_encoder(dev);
 394         }
 395 }
 396
 397 static void empress_signal_change(struct saa7134_dev *dev)
 398 {
 399         schedule_work(&dev->empress_workqueue);
 400 }
 401
 402
 403 static int empress_init(struct saa7134_dev *dev)
 404 {
 405         int err;
 406
 407         dprintk("%s: %s\n",dev->name,__FUNCTION__);
 408         dev->empress_dev = video_device_alloc();
 409         if (NULL == dev->empress_dev)
 410                 return -ENOMEM;
 411         *(dev->empress_dev) = saa7134_empress_template;
 412         dev->empress_dev->dev     = &dev->pci->dev;
 413         dev->empress_dev->release = video_device_release;
 414         snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
 415                  "%s empress (%s)", dev->name,
 416                  saa7134_boards[dev->board].name);
 417
 418         INIT_WORK(&dev->empress_workqueue, empress_signal_update);
 419
 420         err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
 421                                     empress_nr[dev->nr]);
 422         if (err < 0) {
 423                 printk(KERN_INFO "%s: can't register video device\n",
 424                        dev->name);
 425                 video_device_release(dev->empress_dev);
 426                 dev->empress_dev = NULL;
 427                 return err;
 428         }
 429         printk(KERN_INFO "%s: registered device video%d [mpeg]\n",
 430                dev->name,dev->empress_dev->minor & 0x1f);
 431
 432         videobuf_queue_pci_init(&dev->empress_tsq, &saa7134_ts_qops,
 433                             dev->pci, &dev->slock,
 434                             V4L2_BUF_TYPE_VIDEO_CAPTURE,
 435                             V4L2_FIELD_ALTERNATE,
 436                             sizeof(struct saa7134_buf),
 437                             dev);
 438
 439         empress_signal_update(&dev->empress_workqueue);
 440         return 0;
 441 }
 442
 443 static int empress_fini(struct saa7134_dev *dev)
 444 {
 445         dprintk("%s: %s\n",dev->name,__FUNCTION__);
 446
 447         if (NULL == dev->empress_dev)
 448                 return 0;
 449         flush_scheduled_work();
 450         video_unregister_device(dev->empress_dev);
 451         dev->empress_dev = NULL;
 452         return 0;
 453 }
 454
 455 static struct saa7134_mpeg_ops empress_ops = {
 456         .type          = SAA7134_MPEG_EMPRESS,
 457         .init          = empress_init,
 458         .fini          = empress_fini,
 459         .signal_change = empress_signal_change,
 460 };
 461
 462 static int __init empress_register(void)
 463 {
 464         return saa7134_ts_register(&empress_ops);
 465 }
 466
 467 static void __exit empress_unregister(void)
 468 {
 469         saa7134_ts_unregister(&empress_ops);
 470 }
 471
 472 module_init(empress_register);
 473 module_exit(empress_unregister);
 474
 475 /* ----------------------------------------------------------- */
 476 /*
 477  * Local variables:
 478  * c-basic-offset: 8
 479  * End:
 480  */