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 <media/v4l2-common.h>
  27 #include <media/v4l2-event.h>
  28
  29 #include "saa7134-reg.h"
  30 #include "saa7134.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         struct saa7134_fh *fh;
  89
  90         /* allocate + initialize per filehandle data */
  91         fh = kzalloc(sizeof(*fh), GFP_KERNEL);
  92         if (NULL == fh)
  93                 return -ENOMEM;
  94
  95         v4l2_fh_init(&fh->fh, vdev);
  96         file->private_data = fh;
  97         fh->is_empress = true;
  98         v4l2_fh_add(&fh->fh);
  99
 100         /* Unmute audio */
 101         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
 102                 saa_readb(SAA7134_AUDIO_MUTE_CTRL) & ~(1 << 6));
 103
 104         return 0;
 105 }
 106
 107 static int ts_release(struct file *file)
 108 {
 109         struct saa7134_dev *dev = video_drvdata(file);
 110         struct saa7134_fh *fh = file->private_data;
 111
 112         if (res_check(fh, RESOURCE_EMPRESS)) {
 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
 124         v4l2_fh_del(&fh->fh);
 125         v4l2_fh_exit(&fh->fh);
 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 = video_drvdata(file);
 133
 134         if (res_locked(dev, RESOURCE_EMPRESS))
 135                 return -EBUSY;
 136         if (!dev->empress_started)
 137                 ts_init_encoder(dev);
 138
 139         return videobuf_read_stream(&dev->empress_tsq,
 140                                     data, count, ppos, 0,
 141                                     file->f_flags & O_NONBLOCK);
 142 }
 143
 144 static unsigned int
 145 ts_poll(struct file *file, struct poll_table_struct *wait)
 146 {
 147         unsigned long req_events = poll_requested_events(wait);
 148         struct saa7134_dev *dev = video_drvdata(file);
 149         struct saa7134_fh *fh = file->private_data;
 150         unsigned int rc = 0;
 151
 152         if (v4l2_event_pending(&fh->fh))
 153                 rc = POLLPRI;
 154         else if (req_events & POLLPRI)
 155                 poll_wait(file, &fh->fh.wait, wait);
 156         return rc | videobuf_poll_stream(file, &dev->empress_tsq, wait);
 157 }
 158
 159
 160 static int
 161 ts_mmap(struct file *file, struct vm_area_struct * vma)
 162 {
 163         struct saa7134_dev *dev = video_drvdata(file);
 164
 165         return videobuf_mmap_mapper(&dev->empress_tsq, vma);
 166 }
 167
 168 static int empress_enum_fmt_vid_cap(struct file *file, void  *priv,
 169                                         struct v4l2_fmtdesc *f)
 170 {
 171         if (f->index != 0)
 172                 return -EINVAL;
 173
 174         strlcpy(f->description, "MPEG TS", sizeof(f->description));
 175         f->pixelformat = V4L2_PIX_FMT_MPEG;
 176         f->flags = V4L2_FMT_FLAG_COMPRESSED;
 177         return 0;
 178 }
 179
 180 static int empress_g_fmt_vid_cap(struct file *file, void *priv,
 181                                 struct v4l2_format *f)
 182 {
 183         struct saa7134_dev *dev = video_drvdata(file);
 184         struct v4l2_mbus_framefmt mbus_fmt;
 185
 186         saa_call_all(dev, video, g_mbus_fmt, &mbus_fmt);
 187
 188         v4l2_fill_pix_format(&f->fmt.pix, &mbus_fmt);
 189         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 190         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 191         f->fmt.pix.bytesperline = 0;
 192
 193         return 0;
 194 }
 195
 196 static int empress_s_fmt_vid_cap(struct file *file, void *priv,
 197                                 struct v4l2_format *f)
 198 {
 199         struct saa7134_dev *dev = video_drvdata(file);
 200         struct v4l2_mbus_framefmt mbus_fmt;
 201
 202         v4l2_fill_mbus_format(&mbus_fmt, &f->fmt.pix, V4L2_MBUS_FMT_FIXED);
 203         saa_call_all(dev, video, s_mbus_fmt, &mbus_fmt);
 204         v4l2_fill_pix_format(&f->fmt.pix, &mbus_fmt);
 205
 206         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 207         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 208         f->fmt.pix.bytesperline = 0;
 209
 210         return 0;
 211 }
 212
 213 static int empress_try_fmt_vid_cap(struct file *file, void *priv,
 214                                 struct v4l2_format *f)
 215 {
 216         struct saa7134_dev *dev = video_drvdata(file);
 217         struct v4l2_mbus_framefmt mbus_fmt;
 218
 219         v4l2_fill_mbus_format(&mbus_fmt, &f->fmt.pix, V4L2_MBUS_FMT_FIXED);
 220         saa_call_all(dev, video, try_mbus_fmt, &mbus_fmt);
 221         v4l2_fill_pix_format(&f->fmt.pix, &mbus_fmt);
 222
 223         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 224         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 225         f->fmt.pix.bytesperline = 0;
 226
 227         return 0;
 228 }
 229
 230 static const struct v4l2_file_operations ts_fops =
 231 {
 232         .owner    = THIS_MODULE,
 233         .open     = ts_open,
 234         .release  = ts_release,
 235         .read     = ts_read,
 236         .poll     = ts_poll,
 237         .mmap     = ts_mmap,
 238         .ioctl    = video_ioctl2,
 239 };
 240
 241 static const struct v4l2_ioctl_ops ts_ioctl_ops = {
 242         .vidioc_querycap                = saa7134_querycap,
 243         .vidioc_enum_fmt_vid_cap        = empress_enum_fmt_vid_cap,
 244         .vidioc_try_fmt_vid_cap         = empress_try_fmt_vid_cap,
 245         .vidioc_s_fmt_vid_cap           = empress_s_fmt_vid_cap,
 246         .vidioc_g_fmt_vid_cap           = empress_g_fmt_vid_cap,
 247         .vidioc_reqbufs                 = saa7134_reqbufs,
 248         .vidioc_querybuf                = saa7134_querybuf,
 249         .vidioc_qbuf                    = saa7134_qbuf,
 250         .vidioc_dqbuf                   = saa7134_dqbuf,
 251         .vidioc_streamon                = saa7134_streamon,
 252         .vidioc_streamoff               = saa7134_streamoff,
 253         .vidioc_g_frequency             = saa7134_g_frequency,
 254         .vidioc_s_frequency             = saa7134_s_frequency,
 255         .vidioc_g_tuner                 = saa7134_g_tuner,
 256         .vidioc_s_tuner                 = saa7134_s_tuner,
 257         .vidioc_enum_input              = saa7134_enum_input,
 258         .vidioc_g_input                 = saa7134_g_input,
 259         .vidioc_s_input                 = saa7134_s_input,
 260         .vidioc_s_std                   = saa7134_s_std,
 261         .vidioc_g_std                   = saa7134_g_std,
 262         .vidioc_log_status              = v4l2_ctrl_log_status,
 263         .vidioc_subscribe_event         = v4l2_ctrl_subscribe_event,
 264         .vidioc_unsubscribe_event       = v4l2_event_unsubscribe,
 265 };
 266
 267 /* ----------------------------------------------------------- */
 268
 269 static struct video_device saa7134_empress_template = {
 270         .name          = "saa7134-empress",
 271         .fops          = &ts_fops,
 272         .ioctl_ops     = &ts_ioctl_ops,
 273
 274         .tvnorms                        = SAA7134_NORMS,
 275 };
 276
 277 static void empress_signal_update(struct work_struct *work)
 278 {
 279         struct saa7134_dev* dev =
 280                 container_of(work, struct saa7134_dev, empress_workqueue);
 281
 282         if (dev->nosignal) {
 283                 dprintk("no video signal\n");
 284         } else {
 285                 dprintk("video signal acquired\n");
 286         }
 287 }
 288
 289 static void empress_signal_change(struct saa7134_dev *dev)
 290 {
 291         schedule_work(&dev->empress_workqueue);
 292 }
 293
 294 static bool empress_ctrl_filter(const struct v4l2_ctrl *ctrl)
 295 {
 296         switch (ctrl->id) {
 297         case V4L2_CID_BRIGHTNESS:
 298         case V4L2_CID_HUE:
 299         case V4L2_CID_CONTRAST:
 300         case V4L2_CID_SATURATION:
 301         case V4L2_CID_AUDIO_MUTE:
 302         case V4L2_CID_AUDIO_VOLUME:
 303         case V4L2_CID_PRIVATE_INVERT:
 304         case V4L2_CID_PRIVATE_AUTOMUTE:
 305                 return true;
 306         default:
 307                 return false;
 308         }
 309 }
 310
 311 static int empress_init(struct saa7134_dev *dev)
 312 {
 313         struct v4l2_ctrl_handler *hdl = &dev->empress_ctrl_handler;
 314         int err;
 315
 316         dprintk("%s: %s\n",dev->name,__func__);
 317         dev->empress_dev = video_device_alloc();
 318         if (NULL == dev->empress_dev)
 319                 return -ENOMEM;
 320         *(dev->empress_dev) = saa7134_empress_template;
 321         dev->empress_dev->v4l2_dev  = &dev->v4l2_dev;
 322         dev->empress_dev->release = video_device_release;
 323         snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
 324                  "%s empress (%s)", dev->name,
 325                  saa7134_boards[dev->board].name);
 326         set_bit(V4L2_FL_USE_FH_PRIO, &dev->empress_dev->flags);
 327         v4l2_ctrl_handler_init(hdl, 21);
 328         v4l2_ctrl_add_handler(hdl, &dev->ctrl_handler, empress_ctrl_filter);
 329         if (dev->empress_sd)
 330                 v4l2_ctrl_add_handler(hdl, dev->empress_sd->ctrl_handler, NULL);
 331         if (hdl->error) {
 332                 video_device_release(dev->empress_dev);
 333                 return hdl->error;
 334         }
 335         dev->empress_dev->ctrl_handler = hdl;
 336
 337         INIT_WORK(&dev->empress_workqueue, empress_signal_update);
 338
 339         video_set_drvdata(dev->empress_dev, dev);
 340         err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
 341                                     empress_nr[dev->nr]);
 342         if (err < 0) {
 343                 printk(KERN_INFO "%s: can't register video device\n",
 344                        dev->name);
 345                 video_device_release(dev->empress_dev);
 346                 dev->empress_dev = NULL;
 347                 return err;
 348         }
 349         printk(KERN_INFO "%s: registered device %s [mpeg]\n",
 350                dev->name, video_device_node_name(dev->empress_dev));
 351
 352         videobuf_queue_sg_init(&dev->empress_tsq, &saa7134_ts_qops,
 353                             &dev->pci->dev, &dev->slock,
 354                             V4L2_BUF_TYPE_VIDEO_CAPTURE,
 355                             V4L2_FIELD_ALTERNATE,
 356                             sizeof(struct saa7134_buf),
 357                             dev, NULL);
 358
 359         empress_signal_update(&dev->empress_workqueue);
 360         return 0;
 361 }
 362
 363 static int empress_fini(struct saa7134_dev *dev)
 364 {
 365         dprintk("%s: %s\n",dev->name,__func__);
 366
 367         if (NULL == dev->empress_dev)
 368                 return 0;
 369         flush_work(&dev->empress_workqueue);
 370         video_unregister_device(dev->empress_dev);
 371         v4l2_ctrl_handler_free(&dev->empress_ctrl_handler);
 372         dev->empress_dev = NULL;
 373         return 0;
 374 }
 375
 376 static struct saa7134_mpeg_ops empress_ops = {
 377         .type          = SAA7134_MPEG_EMPRESS,
 378         .init          = empress_init,
 379         .fini          = empress_fini,
 380         .signal_change = empress_signal_change,
 381 };
 382
 383 static int __init empress_register(void)
 384 {
 385         return saa7134_ts_register(&empress_ops);
 386 }
 387
 388 static void __exit empress_unregister(void)
 389 {
 390         saa7134_ts_unregister(&empress_ops);
 391 }
 392
 393 module_init(empress_register);
 394 module_exit(empress_unregister);
 395
 396 /* ----------------------------------------------------------- */
 397 /*
 398  * Local variables:
 399  * c-basic-offset: 8
 400  * End:
 401  */