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 static int ts_init_encoder(struct saa7134_dev* dev)
  54 {
  55         u32 leading_null_bytes = 0;
  56
  57         /* If more cards start to need this, then this
  58            should probably be added to the card definitions. */
  59         switch (dev->board) {
  60         case SAA7134_BOARD_BEHOLD_M6:
  61         case SAA7134_BOARD_BEHOLD_M63:
  62         case SAA7134_BOARD_BEHOLD_M6_EXTRA:
  63                 leading_null_bytes = 1;
  64                 break;
  65         }
  66         ts_reset_encoder(dev);
  67         saa_call_all(dev, core, init, leading_null_bytes);
  68         dev->empress_started = 1;
  69         return 0;
  70 }
  71
  72 static void ts_reset_encoder(struct saa7134_dev* dev)
  73 {
  74         if (!dev->empress_started)
  75                 return;
  76
  77         saa_writeb(SAA7134_SPECIAL_MODE, 0x00);
  78         msleep(10);
  79         saa_writeb(SAA7134_SPECIAL_MODE, 0x01);
  80         msleep(100);
  81         dev->empress_started = 0;
  82 }
  83
  84 /* ------------------------------------------------------------------ */
  85
  86 static int ts_open(struct file *file)
  87 {
  88         struct video_device *vdev = video_devdata(file);
  89         struct saa7134_dev *dev = video_drvdata(file);
  90         struct saa7134_fh *fh;
  91
  92         /* allocate + initialize per filehandle data */
  93         fh = kzalloc(sizeof(*fh), GFP_KERNEL);
  94         if (NULL == fh)
  95                 return -ENOMEM;
  96
  97         v4l2_fh_init(&fh->fh, vdev);
  98         file->private_data = fh;
  99         fh->is_empress = true;
 100         v4l2_fh_add(&fh->fh);
 101
 102         /* Unmute audio */
 103         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
 104                 saa_readb(SAA7134_AUDIO_MUTE_CTRL) & ~(1 << 6));
 105
 106         return 0;
 107 }
 108
 109 static int ts_release(struct file *file)
 110 {
 111         struct saa7134_dev *dev = video_drvdata(file);
 112         struct saa7134_fh *fh = file->private_data;
 113
 114         if (res_check(fh, RESOURCE_EMPRESS)) {
 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
 126         v4l2_fh_del(&fh->fh);
 127         v4l2_fh_exit(&fh->fh);
 128         return 0;
 129 }
 130
 131 static ssize_t
 132 ts_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
 133 {
 134         struct saa7134_dev *dev = video_drvdata(file);
 135
 136         if (res_locked(dev, RESOURCE_EMPRESS))
 137                 return -EBUSY;
 138         if (!dev->empress_started)
 139                 ts_init_encoder(dev);
 140
 141         return videobuf_read_stream(&dev->empress_tsq,
 142                                     data, count, ppos, 0,
 143                                     file->f_flags & O_NONBLOCK);
 144 }
 145
 146 static unsigned int
 147 ts_poll(struct file *file, struct poll_table_struct *wait)
 148 {
 149         unsigned long req_events = poll_requested_events(wait);
 150         struct saa7134_dev *dev = video_drvdata(file);
 151         struct saa7134_fh *fh = file->private_data;
 152         unsigned int rc = 0;
 153
 154         if (v4l2_event_pending(&fh->fh))
 155                 rc = POLLPRI;
 156         else if (req_events & POLLPRI)
 157                 poll_wait(file, &fh->fh.wait, wait);
 158         return rc | videobuf_poll_stream(file, &dev->empress_tsq, wait);
 159 }
 160
 161
 162 static int
 163 ts_mmap(struct file *file, struct vm_area_struct * vma)
 164 {
 165         struct saa7134_dev *dev = video_drvdata(file);
 166
 167         return videobuf_mmap_mapper(&dev->empress_tsq, vma);
 168 }
 169
 170 static int empress_enum_fmt_vid_cap(struct file *file, void  *priv,
 171                                         struct v4l2_fmtdesc *f)
 172 {
 173         if (f->index != 0)
 174                 return -EINVAL;
 175
 176         strlcpy(f->description, "MPEG TS", sizeof(f->description));
 177         f->pixelformat = V4L2_PIX_FMT_MPEG;
 178         f->flags = V4L2_FMT_FLAG_COMPRESSED;
 179         return 0;
 180 }
 181
 182 static int empress_g_fmt_vid_cap(struct file *file, void *priv,
 183                                 struct v4l2_format *f)
 184 {
 185         struct saa7134_dev *dev = video_drvdata(file);
 186         struct v4l2_mbus_framefmt mbus_fmt;
 187
 188         saa_call_all(dev, video, g_mbus_fmt, &mbus_fmt);
 189
 190         v4l2_fill_pix_format(&f->fmt.pix, &mbus_fmt);
 191         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 192         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 193         f->fmt.pix.bytesperline = 0;
 194         f->fmt.pix.priv = 0;
 195
 196         return 0;
 197 }
 198
 199 static int empress_s_fmt_vid_cap(struct file *file, void *priv,
 200                                 struct v4l2_format *f)
 201 {
 202         struct saa7134_dev *dev = video_drvdata(file);
 203         struct v4l2_mbus_framefmt mbus_fmt;
 204
 205         v4l2_fill_mbus_format(&mbus_fmt, &f->fmt.pix, V4L2_MBUS_FMT_FIXED);
 206         saa_call_all(dev, video, s_mbus_fmt, &mbus_fmt);
 207         v4l2_fill_pix_format(&f->fmt.pix, &mbus_fmt);
 208
 209         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 210         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 211         f->fmt.pix.bytesperline = 0;
 212         f->fmt.pix.priv = 0;
 213
 214         return 0;
 215 }
 216
 217 static int empress_try_fmt_vid_cap(struct file *file, void *priv,
 218                                 struct v4l2_format *f)
 219 {
 220         struct saa7134_dev *dev = video_drvdata(file);
 221         struct v4l2_mbus_framefmt mbus_fmt;
 222
 223         v4l2_fill_mbus_format(&mbus_fmt, &f->fmt.pix, V4L2_MBUS_FMT_FIXED);
 224         saa_call_all(dev, video, try_mbus_fmt, &mbus_fmt);
 225         v4l2_fill_pix_format(&f->fmt.pix, &mbus_fmt);
 226
 227         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 228         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 229         f->fmt.pix.bytesperline = 0;
 230         f->fmt.pix.priv = 0;
 231
 232         return 0;
 233 }
 234
 235 static const struct v4l2_file_operations ts_fops =
 236 {
 237         .owner    = THIS_MODULE,
 238         .open     = ts_open,
 239         .release  = ts_release,
 240         .read     = ts_read,
 241         .poll     = ts_poll,
 242         .mmap     = ts_mmap,
 243         .ioctl    = video_ioctl2,
 244 };
 245
 246 static const struct v4l2_ioctl_ops ts_ioctl_ops = {
 247         .vidioc_querycap                = saa7134_querycap,
 248         .vidioc_enum_fmt_vid_cap        = empress_enum_fmt_vid_cap,
 249         .vidioc_try_fmt_vid_cap         = empress_try_fmt_vid_cap,
 250         .vidioc_s_fmt_vid_cap           = empress_s_fmt_vid_cap,
 251         .vidioc_g_fmt_vid_cap           = empress_g_fmt_vid_cap,
 252         .vidioc_reqbufs                 = saa7134_reqbufs,
 253         .vidioc_querybuf                = saa7134_querybuf,
 254         .vidioc_qbuf                    = saa7134_qbuf,
 255         .vidioc_dqbuf                   = saa7134_dqbuf,
 256         .vidioc_streamon                = saa7134_streamon,
 257         .vidioc_streamoff               = saa7134_streamoff,
 258         .vidioc_g_frequency             = saa7134_g_frequency,
 259         .vidioc_s_frequency             = saa7134_s_frequency,
 260         .vidioc_g_tuner                 = saa7134_g_tuner,
 261         .vidioc_s_tuner                 = saa7134_s_tuner,
 262         .vidioc_enum_input              = saa7134_enum_input,
 263         .vidioc_g_input                 = saa7134_g_input,
 264         .vidioc_s_input                 = saa7134_s_input,
 265         .vidioc_s_std                   = saa7134_s_std,
 266         .vidioc_g_std                   = saa7134_g_std,
 267         .vidioc_log_status              = v4l2_ctrl_log_status,
 268         .vidioc_subscribe_event         = v4l2_ctrl_subscribe_event,
 269         .vidioc_unsubscribe_event       = v4l2_event_unsubscribe,
 270 };
 271
 272 /* ----------------------------------------------------------- */
 273
 274 static struct video_device saa7134_empress_template = {
 275         .name          = "saa7134-empress",
 276         .fops          = &ts_fops,
 277         .ioctl_ops     = &ts_ioctl_ops,
 278
 279         .tvnorms                        = SAA7134_NORMS,
 280 };
 281
 282 static void empress_signal_update(struct work_struct *work)
 283 {
 284         struct saa7134_dev* dev =
 285                 container_of(work, struct saa7134_dev, empress_workqueue);
 286
 287         if (dev->nosignal) {
 288                 dprintk("no video signal\n");
 289         } else {
 290                 dprintk("video signal acquired\n");
 291         }
 292 }
 293
 294 static void empress_signal_change(struct saa7134_dev *dev)
 295 {
 296         schedule_work(&dev->empress_workqueue);
 297 }
 298
 299 static bool empress_ctrl_filter(const struct v4l2_ctrl *ctrl)
 300 {
 301         switch (ctrl->id) {
 302         case V4L2_CID_BRIGHTNESS:
 303         case V4L2_CID_HUE:
 304         case V4L2_CID_CONTRAST:
 305         case V4L2_CID_SATURATION:
 306         case V4L2_CID_AUDIO_MUTE:
 307         case V4L2_CID_AUDIO_VOLUME:
 308         case V4L2_CID_PRIVATE_INVERT:
 309         case V4L2_CID_PRIVATE_AUTOMUTE:
 310                 return true;
 311         default:
 312                 return false;
 313         }
 314 }
 315
 316 static int empress_init(struct saa7134_dev *dev)
 317 {
 318         struct v4l2_ctrl_handler *hdl = &dev->empress_ctrl_handler;
 319         int err;
 320
 321         dprintk("%s: %s\n",dev->name,__func__);
 322         dev->empress_dev = video_device_alloc();
 323         if (NULL == dev->empress_dev)
 324                 return -ENOMEM;
 325         *(dev->empress_dev) = saa7134_empress_template;
 326         dev->empress_dev->v4l2_dev  = &dev->v4l2_dev;
 327         dev->empress_dev->release = video_device_release;
 328         snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
 329                  "%s empress (%s)", dev->name,
 330                  saa7134_boards[dev->board].name);
 331         set_bit(V4L2_FL_USE_FH_PRIO, &dev->empress_dev->flags);
 332         v4l2_ctrl_handler_init(hdl, 21);
 333         v4l2_ctrl_add_handler(hdl, &dev->ctrl_handler, empress_ctrl_filter);
 334         if (dev->empress_sd)
 335                 v4l2_ctrl_add_handler(hdl, dev->empress_sd->ctrl_handler, NULL);
 336         if (hdl->error) {
 337                 video_device_release(dev->empress_dev);
 338                 return hdl->error;
 339         }
 340         dev->empress_dev->ctrl_handler = hdl;
 341
 342         INIT_WORK(&dev->empress_workqueue, empress_signal_update);
 343
 344         video_set_drvdata(dev->empress_dev, dev);
 345         err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
 346                                     empress_nr[dev->nr]);
 347         if (err < 0) {
 348                 printk(KERN_INFO "%s: can't register video device\n",
 349                        dev->name);
 350                 video_device_release(dev->empress_dev);
 351                 dev->empress_dev = NULL;
 352                 return err;
 353         }
 354         printk(KERN_INFO "%s: registered device %s [mpeg]\n",
 355                dev->name, video_device_node_name(dev->empress_dev));
 356
 357         videobuf_queue_sg_init(&dev->empress_tsq, &saa7134_ts_qops,
 358                             &dev->pci->dev, &dev->slock,
 359                             V4L2_BUF_TYPE_VIDEO_CAPTURE,
 360                             V4L2_FIELD_ALTERNATE,
 361                             sizeof(struct saa7134_buf),
 362                             dev, NULL);
 363
 364         empress_signal_update(&dev->empress_workqueue);
 365         return 0;
 366 }
 367
 368 static int empress_fini(struct saa7134_dev *dev)
 369 {
 370         dprintk("%s: %s\n",dev->name,__func__);
 371
 372         if (NULL == dev->empress_dev)
 373                 return 0;
 374         flush_work(&dev->empress_workqueue);
 375         video_unregister_device(dev->empress_dev);
 376         v4l2_ctrl_handler_free(&dev->empress_ctrl_handler);
 377         dev->empress_dev = NULL;
 378         return 0;
 379 }
 380
 381 static struct saa7134_mpeg_ops empress_ops = {
 382         .type          = SAA7134_MPEG_EMPRESS,
 383         .init          = empress_init,
 384         .fini          = empress_fini,
 385         .signal_change = empress_signal_change,
 386 };
 387
 388 static int __init empress_register(void)
 389 {
 390         return saa7134_ts_register(&empress_ops);
 391 }
 392
 393 static void __exit empress_unregister(void)
 394 {
 395         saa7134_ts_unregister(&empress_ops);
 396 }
 397
 398 module_init(empress_register);
 399 module_exit(empress_unregister);