drivers/media/pci/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/delay.h>
  25
  26 #include "saa7134-reg.h"
  27 #include "saa7134.h"
  28
  29 #include <media/saa6752hs.h>
  30 #include <media/v4l2-common.h>
  31
  32 /* ------------------------------------------------------------------ */
  33
  34 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
  35 MODULE_LICENSE("GPL");
  36
  37 static unsigned int empress_nr[] = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET };
  38
  39 module_param_array(empress_nr, int, NULL, 0444);
  40 MODULE_PARM_DESC(empress_nr,"ts device number");
  41
  42 static unsigned int debug;
  43 module_param(debug, int, 0644);
  44 MODULE_PARM_DESC(debug,"enable debug messages");
  45
  46 #define dprintk(fmt, arg...)    if (debug)                      \
  47         printk(KERN_DEBUG "%s/empress: " fmt, dev->name , ## arg)
  48
  49 /* ------------------------------------------------------------------ */
  50
  51 static void ts_reset_encoder(struct saa7134_dev* dev)
  52 {
  53         if (!dev->empress_started)
  54                 return;
  55
  56         saa_writeb(SAA7134_SPECIAL_MODE, 0x00);
  57         msleep(10);
  58         saa_writeb(SAA7134_SPECIAL_MODE, 0x01);
  59         msleep(100);
  60         dev->empress_started = 0;
  61 }
  62
  63 static int ts_init_encoder(struct saa7134_dev* dev)
  64 {
  65         u32 leading_null_bytes = 0;
  66
  67         /* If more cards start to need this, then this
  68            should probably be added to the card definitions. */
  69         switch (dev->board) {
  70         case SAA7134_BOARD_BEHOLD_M6:
  71         case SAA7134_BOARD_BEHOLD_M63:
  72         case SAA7134_BOARD_BEHOLD_M6_EXTRA:
  73                 leading_null_bytes = 1;
  74                 break;
  75         }
  76         ts_reset_encoder(dev);
  77         saa_call_all(dev, core, init, leading_null_bytes);
  78         dev->empress_started = 1;
  79         return 0;
  80 }
  81
  82 /* ------------------------------------------------------------------ */
  83
  84 static int ts_open(struct file *file)
  85 {
  86         struct video_device *vdev = video_devdata(file);
  87         struct saa7134_dev *dev = video_drvdata(file);
  88         int err;
  89
  90         dprintk("open dev=%s\n", video_device_node_name(vdev));
  91         err = -EBUSY;
  92         if (!mutex_trylock(&dev->empress_tsq.vb_lock))
  93                 return err;
  94         if (atomic_read(&dev->empress_users))
  95                 goto done;
  96
  97         /* Unmute audio */
  98         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
  99                 saa_readb(SAA7134_AUDIO_MUTE_CTRL) & ~(1 << 6));
 100
 101         atomic_inc(&dev->empress_users);
 102         file->private_data = dev;
 103         err = 0;
 104
 105 done:
 106         mutex_unlock(&dev->empress_tsq.vb_lock);
 107         return err;
 108 }
 109
 110 static int ts_release(struct file *file)
 111 {
 112         struct saa7134_dev *dev = file->private_data;
 113
 114         videobuf_stop(&dev->empress_tsq);
 115         videobuf_mmap_free(&dev->empress_tsq);
 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         atomic_dec(&dev->empress_users);
 125
 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 static int empress_enum_fmt_vid_cap(struct file *file, void  *priv,
 160                                         struct v4l2_fmtdesc *f)
 161 {
 162         if (f->index != 0)
 163                 return -EINVAL;
 164
 165         strlcpy(f->description, "MPEG TS", sizeof(f->description));
 166         f->pixelformat = V4L2_PIX_FMT_MPEG;
 167         f->flags = V4L2_FMT_FLAG_COMPRESSED;
 168         return 0;
 169 }
 170
 171 static int empress_g_fmt_vid_cap(struct file *file, void *priv,
 172                                 struct v4l2_format *f)
 173 {
 174         struct saa7134_dev *dev = file->private_data;
 175         struct v4l2_mbus_framefmt mbus_fmt;
 176
 177         saa_call_all(dev, video, g_mbus_fmt, &mbus_fmt);
 178
 179         v4l2_fill_pix_format(&f->fmt.pix, &mbus_fmt);
 180         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 181         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 182         f->fmt.pix.bytesperline = 0;
 183         f->fmt.pix.priv = 0;
 184
 185         return 0;
 186 }
 187
 188 static int empress_s_fmt_vid_cap(struct file *file, void *priv,
 189                                 struct v4l2_format *f)
 190 {
 191         struct saa7134_dev *dev = file->private_data;
 192         struct v4l2_mbus_framefmt mbus_fmt;
 193
 194         v4l2_fill_mbus_format(&mbus_fmt, &f->fmt.pix, V4L2_MBUS_FMT_FIXED);
 195         saa_call_all(dev, video, s_mbus_fmt, &mbus_fmt);
 196         v4l2_fill_pix_format(&f->fmt.pix, &mbus_fmt);
 197
 198         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 199         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 200         f->fmt.pix.bytesperline = 0;
 201         f->fmt.pix.priv = 0;
 202
 203         return 0;
 204 }
 205
 206 static int empress_try_fmt_vid_cap(struct file *file, void *priv,
 207                                 struct v4l2_format *f)
 208 {
 209         struct saa7134_dev *dev = file->private_data;
 210         struct v4l2_mbus_framefmt mbus_fmt;
 211
 212         v4l2_fill_mbus_format(&mbus_fmt, &f->fmt.pix, V4L2_MBUS_FMT_FIXED);
 213         saa_call_all(dev, video, try_mbus_fmt, &mbus_fmt);
 214         v4l2_fill_pix_format(&f->fmt.pix, &mbus_fmt);
 215
 216         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 217         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 218         f->fmt.pix.bytesperline = 0;
 219         f->fmt.pix.priv = 0;
 220
 221         return 0;
 222 }
 223
 224 static int empress_reqbufs(struct file *file, void *priv,
 225                                         struct v4l2_requestbuffers *p)
 226 {
 227         struct saa7134_dev *dev = file->private_data;
 228
 229         return videobuf_reqbufs(&dev->empress_tsq, p);
 230 }
 231
 232 static int empress_querybuf(struct file *file, void *priv,
 233                                         struct v4l2_buffer *b)
 234 {
 235         struct saa7134_dev *dev = file->private_data;
 236
 237         return videobuf_querybuf(&dev->empress_tsq, b);
 238 }
 239
 240 static int empress_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
 241 {
 242         struct saa7134_dev *dev = file->private_data;
 243
 244         return videobuf_qbuf(&dev->empress_tsq, b);
 245 }
 246
 247 static int empress_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
 248 {
 249         struct saa7134_dev *dev = file->private_data;
 250
 251         return videobuf_dqbuf(&dev->empress_tsq, b,
 252                                 file->f_flags & O_NONBLOCK);
 253 }
 254
 255 static int empress_streamon(struct file *file, void *priv,
 256                                         enum v4l2_buf_type type)
 257 {
 258         struct saa7134_dev *dev = file->private_data;
 259
 260         return videobuf_streamon(&dev->empress_tsq);
 261 }
 262
 263 static int empress_streamoff(struct file *file, void *priv,
 264                                         enum v4l2_buf_type type)
 265 {
 266         struct saa7134_dev *dev = file->private_data;
 267
 268         return videobuf_streamoff(&dev->empress_tsq);
 269 }
 270
 271 static const struct v4l2_file_operations ts_fops =
 272 {
 273         .owner    = THIS_MODULE,
 274         .open     = ts_open,
 275         .release  = ts_release,
 276         .read     = ts_read,
 277         .poll     = ts_poll,
 278         .mmap     = ts_mmap,
 279         .ioctl    = video_ioctl2,
 280 };
 281
 282 static const struct v4l2_ioctl_ops ts_ioctl_ops = {
 283         .vidioc_querycap                = saa7134_querycap,
 284         .vidioc_enum_fmt_vid_cap        = empress_enum_fmt_vid_cap,
 285         .vidioc_try_fmt_vid_cap         = empress_try_fmt_vid_cap,
 286         .vidioc_s_fmt_vid_cap           = empress_s_fmt_vid_cap,
 287         .vidioc_g_fmt_vid_cap           = empress_g_fmt_vid_cap,
 288         .vidioc_reqbufs                 = empress_reqbufs,
 289         .vidioc_querybuf                = empress_querybuf,
 290         .vidioc_qbuf                    = empress_qbuf,
 291         .vidioc_dqbuf                   = empress_dqbuf,
 292         .vidioc_streamon                = empress_streamon,
 293         .vidioc_streamoff               = empress_streamoff,
 294         .vidioc_g_frequency             = saa7134_g_frequency,
 295         .vidioc_s_frequency             = saa7134_s_frequency,
 296         .vidioc_g_tuner                 = saa7134_g_tuner,
 297         .vidioc_s_tuner                 = saa7134_s_tuner,
 298         .vidioc_enum_input              = saa7134_enum_input,
 299         .vidioc_g_input                 = saa7134_g_input,
 300         .vidioc_s_input                 = saa7134_s_input,
 301         .vidioc_s_std                   = saa7134_s_std,
 302         .vidioc_g_std                   = saa7134_g_std,
 303 };
 304
 305 /* ----------------------------------------------------------- */
 306
 307 static struct video_device saa7134_empress_template = {
 308         .name          = "saa7134-empress",
 309         .fops          = &ts_fops,
 310         .ioctl_ops     = &ts_ioctl_ops,
 311
 312         .tvnorms                        = SAA7134_NORMS,
 313 };
 314
 315 static void empress_signal_update(struct work_struct *work)
 316 {
 317         struct saa7134_dev* dev =
 318                 container_of(work, struct saa7134_dev, empress_workqueue);
 319
 320         if (dev->nosignal) {
 321                 dprintk("no video signal\n");
 322         } else {
 323                 dprintk("video signal acquired\n");
 324         }
 325 }
 326
 327 static void empress_signal_change(struct saa7134_dev *dev)
 328 {
 329         schedule_work(&dev->empress_workqueue);
 330 }
 331
 332 static bool empress_ctrl_filter(const struct v4l2_ctrl *ctrl)
 333 {
 334         switch (ctrl->id) {
 335         case V4L2_CID_BRIGHTNESS:
 336         case V4L2_CID_HUE:
 337         case V4L2_CID_CONTRAST:
 338         case V4L2_CID_SATURATION:
 339         case V4L2_CID_AUDIO_MUTE:
 340         case V4L2_CID_AUDIO_VOLUME:
 341         case V4L2_CID_PRIVATE_INVERT:
 342         case V4L2_CID_PRIVATE_AUTOMUTE:
 343                 return true;
 344         default:
 345                 return false;
 346         }
 347 }
 348
 349 static int empress_init(struct saa7134_dev *dev)
 350 {
 351         struct v4l2_ctrl_handler *hdl = &dev->empress_ctrl_handler;
 352         int err;
 353
 354         dprintk("%s: %s\n",dev->name,__func__);
 355         dev->empress_dev = video_device_alloc();
 356         if (NULL == dev->empress_dev)
 357                 return -ENOMEM;
 358         *(dev->empress_dev) = saa7134_empress_template;
 359         dev->empress_dev->v4l2_dev  = &dev->v4l2_dev;
 360         dev->empress_dev->release = video_device_release;
 361         snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
 362                  "%s empress (%s)", dev->name,
 363                  saa7134_boards[dev->board].name);
 364         v4l2_ctrl_handler_init(hdl, 21);
 365         v4l2_ctrl_add_handler(hdl, &dev->ctrl_handler, empress_ctrl_filter);
 366         if (dev->empress_sd)
 367                 v4l2_ctrl_add_handler(hdl, dev->empress_sd->ctrl_handler, NULL);
 368         if (hdl->error) {
 369                 video_device_release(dev->empress_dev);
 370                 return hdl->error;
 371         }
 372         dev->empress_dev->ctrl_handler = hdl;
 373
 374         INIT_WORK(&dev->empress_workqueue, empress_signal_update);
 375
 376         video_set_drvdata(dev->empress_dev, dev);
 377         err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
 378                                     empress_nr[dev->nr]);
 379         if (err < 0) {
 380                 printk(KERN_INFO "%s: can't register video device\n",
 381                        dev->name);
 382                 video_device_release(dev->empress_dev);
 383                 dev->empress_dev = NULL;
 384                 return err;
 385         }
 386         printk(KERN_INFO "%s: registered device %s [mpeg]\n",
 387                dev->name, video_device_node_name(dev->empress_dev));
 388
 389         videobuf_queue_sg_init(&dev->empress_tsq, &saa7134_ts_qops,
 390                             &dev->pci->dev, &dev->slock,
 391                             V4L2_BUF_TYPE_VIDEO_CAPTURE,
 392                             V4L2_FIELD_ALTERNATE,
 393                             sizeof(struct saa7134_buf),
 394                             dev, NULL);
 395
 396         empress_signal_update(&dev->empress_workqueue);
 397         return 0;
 398 }
 399
 400 static int empress_fini(struct saa7134_dev *dev)
 401 {
 402         dprintk("%s: %s\n",dev->name,__func__);
 403
 404         if (NULL == dev->empress_dev)
 405                 return 0;
 406         flush_work(&dev->empress_workqueue);
 407         video_unregister_device(dev->empress_dev);
 408         v4l2_ctrl_handler_free(&dev->empress_ctrl_handler);
 409         dev->empress_dev = NULL;
 410         return 0;
 411 }
 412
 413 static struct saa7134_mpeg_ops empress_ops = {
 414         .type          = SAA7134_MPEG_EMPRESS,
 415         .init          = empress_init,
 416         .fini          = empress_fini,
 417         .signal_change = empress_signal_change,
 418 };
 419
 420 static int __init empress_register(void)
 421 {
 422         return saa7134_ts_register(&empress_ops);
 423 }
 424
 425 static void __exit empress_unregister(void)
 426 {
 427         saa7134_ts_unregister(&empress_ops);
 428 }
 429
 430 module_init(empress_register);
 431 module_exit(empress_unregister);
 432
 433 /* ----------------------------------------------------------- */
 434 /*
 435  * Local variables:
 436  * c-basic-offset: 8
 437  * End:
 438  */