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
 116         /* stop the encoder */
 117         ts_reset_encoder(dev);
 118
 119         /* Mute audio */
 120         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
 121                 saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6));
 122
 123         dev->empress_users--;
 124
 125         return 0;
 126 }
 127
 128 static ssize_t
 129 ts_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
 130 {
 131         struct saa7134_dev *dev = file->private_data;
 132
 133         if (!dev->empress_started)
 134                 ts_init_encoder(dev);
 135
 136         return videobuf_read_stream(&dev->empress_tsq,
 137                                     data, count, ppos, 0,
 138                                     file->f_flags & O_NONBLOCK);
 139 }
 140
 141 static unsigned int
 142 ts_poll(struct file *file, struct poll_table_struct *wait)
 143 {
 144         struct saa7134_dev *dev = file->private_data;
 145
 146         return videobuf_poll_stream(file, &dev->empress_tsq, wait);
 147 }
 148
 149
 150 static int
 151 ts_mmap(struct file *file, struct vm_area_struct * vma)
 152 {
 153         struct saa7134_dev *dev = file->private_data;
 154
 155         return videobuf_mmap_mapper(&dev->empress_tsq, vma);
 156 }
 157
 158 /*
 159  * This function is _not_ called directly, but from
 160  * video_generic_ioctl (and maybe others).  userspace
 161  * copying is done already, arg is a kernel pointer.
 162  */
 163
 164 static int empress_querycap(struct file *file, void  *priv,
 165                                         struct v4l2_capability *cap)
 166 {
 167         struct saa7134_dev *dev = file->private_data;
 168
 169         strcpy(cap->driver, "saa7134");
 170         strlcpy(cap->card, saa7134_boards[dev->board].name,
 171                 sizeof(cap->card));
 172         sprintf(cap->bus_info, "PCI:%s", pci_name(dev->pci));
 173         cap->version = SAA7134_VERSION_CODE;
 174         cap->capabilities =
 175                 V4L2_CAP_VIDEO_CAPTURE |
 176                 V4L2_CAP_READWRITE |
 177                 V4L2_CAP_STREAMING;
 178         return 0;
 179 }
 180
 181 static int empress_enum_input(struct file *file, void *priv,
 182                                         struct v4l2_input *i)
 183 {
 184         if (i->index != 0)
 185                 return -EINVAL;
 186
 187         i->type = V4L2_INPUT_TYPE_CAMERA;
 188         strcpy(i->name, "CCIR656");
 189
 190         return 0;
 191 }
 192
 193 static int empress_g_input(struct file *file, void *priv, unsigned int *i)
 194 {
 195         *i = 0;
 196         return 0;
 197 }
 198
 199 static int empress_s_input(struct file *file, void *priv, unsigned int i)
 200 {
 201         if (i != 0)
 202                 return -EINVAL;
 203
 204         return 0;
 205 }
 206
 207 static int empress_enum_fmt_cap(struct file *file, void  *priv,
 208                                         struct v4l2_fmtdesc *f)
 209 {
 210         if (f->index != 0)
 211                 return -EINVAL;
 212
 213         strlcpy(f->description, "MPEG TS", sizeof(f->description));
 214         f->pixelformat = V4L2_PIX_FMT_MPEG;
 215
 216         return 0;
 217 }
 218
 219 static int empress_g_fmt_cap(struct file *file, void *priv,
 220                                 struct v4l2_format *f)
 221 {
 222         struct saa7134_dev *dev = file->private_data;
 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_dev *dev = file->private_data;
 236
 237         saa7134_i2c_call_clients(dev, VIDIOC_S_FMT, f);
 238
 239         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 240         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 241
 242         return 0;
 243 }
 244
 245
 246 static int empress_reqbufs(struct file *file, void *priv,
 247                                         struct v4l2_requestbuffers *p)
 248 {
 249         struct saa7134_dev *dev = file->private_data;
 250
 251         return videobuf_reqbufs(&dev->empress_tsq, p);
 252 }
 253
 254 static int empress_querybuf(struct file *file, void *priv,
 255                                         struct v4l2_buffer *b)
 256 {
 257         struct saa7134_dev *dev = file->private_data;
 258
 259         return videobuf_querybuf(&dev->empress_tsq, b);
 260 }
 261
 262 static int empress_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
 263 {
 264         struct saa7134_dev *dev = file->private_data;
 265
 266         return videobuf_qbuf(&dev->empress_tsq, b);
 267 }
 268
 269 static int empress_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
 270 {
 271         struct saa7134_dev *dev = file->private_data;
 272
 273         return videobuf_dqbuf(&dev->empress_tsq, b,
 274                                 file->f_flags & O_NONBLOCK);
 275 }
 276
 277 static int empress_streamon(struct file *file, void *priv,
 278                                         enum v4l2_buf_type type)
 279 {
 280         struct saa7134_dev *dev = file->private_data;
 281
 282         return videobuf_streamon(&dev->empress_tsq);
 283 }
 284
 285 static int empress_streamoff(struct file *file, void *priv,
 286                                         enum v4l2_buf_type type)
 287 {
 288         struct saa7134_dev *dev = file->private_data;
 289
 290         return videobuf_streamoff(&dev->empress_tsq);
 291 }
 292
 293 static int empress_s_ext_ctrls(struct file *file, void *priv,
 294                                struct v4l2_ext_controls *ctrls)
 295 {
 296         struct saa7134_dev *dev = file->private_data;
 297
 298         /* count == 0 is abused in saa6752hs.c, so that special
 299                 case is handled here explicitly. */
 300         if (ctrls->count == 0)
 301                 return 0;
 302
 303         if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 304                 return -EINVAL;
 305
 306         saa7134_i2c_call_clients(dev, VIDIOC_S_EXT_CTRLS, ctrls);
 307         ts_init_encoder(dev);
 308
 309         return 0;
 310 }
 311
 312 static int empress_g_ext_ctrls(struct file *file, void *priv,
 313                                struct v4l2_ext_controls *ctrls)
 314 {
 315         struct saa7134_dev *dev = file->private_data;
 316
 317         if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 318                 return -EINVAL;
 319         saa7134_i2c_call_clients(dev, VIDIOC_G_EXT_CTRLS, ctrls);
 320
 321         return 0;
 322 }
 323
 324 static const struct file_operations ts_fops =
 325 {
 326         .owner    = THIS_MODULE,
 327         .open     = ts_open,
 328         .release  = ts_release,
 329         .read     = ts_read,
 330         .poll     = ts_poll,
 331         .mmap     = ts_mmap,
 332         .ioctl    = video_ioctl2,
 333         .llseek   = no_llseek,
 334 };
 335
 336 /* ----------------------------------------------------------- */
 337
 338 static struct video_device saa7134_empress_template =
 339 {
 340         .name          = "saa7134-empress",
 341         .type          = 0 /* FIXME */,
 342         .type2         = 0 /* FIXME */,
 343         .fops          = &ts_fops,
 344         .minor         = -1,
 345
 346         .vidioc_querycap                = empress_querycap,
 347         .vidioc_enum_fmt_cap            = empress_enum_fmt_cap,
 348         .vidioc_s_fmt_cap               = empress_s_fmt_cap,
 349         .vidioc_g_fmt_cap               = empress_g_fmt_cap,
 350         .vidioc_reqbufs                 = empress_reqbufs,
 351         .vidioc_querybuf                = empress_querybuf,
 352         .vidioc_qbuf                    = empress_qbuf,
 353         .vidioc_dqbuf                   = empress_dqbuf,
 354         .vidioc_streamon                = empress_streamon,
 355         .vidioc_streamoff               = empress_streamoff,
 356         .vidioc_s_ext_ctrls             = empress_s_ext_ctrls,
 357         .vidioc_g_ext_ctrls             = empress_g_ext_ctrls,
 358         .vidioc_enum_input              = empress_enum_input,
 359         .vidioc_g_input                 = empress_g_input,
 360         .vidioc_s_input                 = empress_s_input,
 361
 362         .vidioc_queryctrl               = saa7134_queryctrl,
 363         .vidioc_g_ctrl                  = saa7134_g_ctrl,
 364         .vidioc_s_ctrl                  = saa7134_s_ctrl,
 365
 366         .tvnorms                        = SAA7134_NORMS,
 367         .current_norm                   = V4L2_STD_PAL,
 368 };
 369
 370 static void empress_signal_update(struct work_struct *work)
 371 {
 372         struct saa7134_dev* dev =
 373                 container_of(work, struct saa7134_dev, empress_workqueue);
 374
 375         if (dev->nosignal) {
 376                 dprintk("no video signal\n");
 377                 ts_reset_encoder(dev);
 378         } else {
 379                 dprintk("video signal acquired\n");
 380                 if (dev->empress_users)
 381                         ts_init_encoder(dev);
 382         }
 383 }
 384
 385 static void empress_signal_change(struct saa7134_dev *dev)
 386 {
 387         schedule_work(&dev->empress_workqueue);
 388 }
 389
 390
 391 static int empress_init(struct saa7134_dev *dev)
 392 {
 393         int err;
 394
 395         dprintk("%s: %s\n",dev->name,__func__);
 396         dev->empress_dev = video_device_alloc();
 397         if (NULL == dev->empress_dev)
 398                 return -ENOMEM;
 399         *(dev->empress_dev) = saa7134_empress_template;
 400         dev->empress_dev->dev     = &dev->pci->dev;
 401         dev->empress_dev->release = video_device_release;
 402         snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
 403                  "%s empress (%s)", dev->name,
 404                  saa7134_boards[dev->board].name);
 405
 406         INIT_WORK(&dev->empress_workqueue, empress_signal_update);
 407
 408         err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
 409                                     empress_nr[dev->nr]);
 410         if (err < 0) {
 411                 printk(KERN_INFO "%s: can't register video device\n",
 412                        dev->name);
 413                 video_device_release(dev->empress_dev);
 414                 dev->empress_dev = NULL;
 415                 return err;
 416         }
 417         printk(KERN_INFO "%s: registered device video%d [mpeg]\n",
 418                dev->name,dev->empress_dev->minor & 0x1f);
 419
 420         videobuf_queue_sg_init(&dev->empress_tsq, &saa7134_ts_qops,
 421                             &dev->pci->dev, &dev->slock,
 422                             V4L2_BUF_TYPE_VIDEO_CAPTURE,
 423                             V4L2_FIELD_ALTERNATE,
 424                             sizeof(struct saa7134_buf),
 425                             dev);
 426
 427         empress_signal_update(&dev->empress_workqueue);
 428         return 0;
 429 }
 430
 431 static int empress_fini(struct saa7134_dev *dev)
 432 {
 433         dprintk("%s: %s\n",dev->name,__func__);
 434
 435         if (NULL == dev->empress_dev)
 436                 return 0;
 437         flush_scheduled_work();
 438         video_unregister_device(dev->empress_dev);
 439         dev->empress_dev = NULL;
 440         return 0;
 441 }
 442
 443 static struct saa7134_mpeg_ops empress_ops = {
 444         .type          = SAA7134_MPEG_EMPRESS,
 445         .init          = empress_init,
 446         .fini          = empress_fini,
 447         .signal_change = empress_signal_change,
 448 };
 449
 450 static int __init empress_register(void)
 451 {
 452         return saa7134_ts_register(&empress_ops);
 453 }
 454
 455 static void __exit empress_unregister(void)
 456 {
 457         saa7134_ts_unregister(&empress_ops);
 458 }
 459
 460 module_init(empress_register);
 461 module_exit(empress_unregister);
 462
 463 /* ----------------------------------------------------------- */
 464 /*
 465  * Local variables:
 466  * c-basic-offset: 8
 467  * End:
 468  */