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