kernel/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 "saa7134.h"
  21 #include "saa7134-reg.h"
  22
  23 #include <linux/init.h>
  24 #include <linux/list.h>
  25 #include <linux/module.h>
  26 #include <linux/kernel.h>
  27 #include <linux/delay.h>
  28
  29 #include <media/v4l2-common.h>
  30 #include <media/v4l2-event.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 /* ------------------------------------------------------------------ */
  43
  44 static int start_streaming(struct vb2_queue *vq, unsigned int count)
  45 {
  46         struct saa7134_dmaqueue *dmaq = vq->drv_priv;
  47         struct saa7134_dev *dev = dmaq->dev;
  48         u32 leading_null_bytes = 0;
  49         int err;
  50
  51         err = saa7134_ts_start_streaming(vq, count);
  52         if (err)
  53                 return err;
  54
  55         /* If more cards start to need this, then this
  56            should probably be added to the card definitions. */
  57         switch (dev->board) {
  58         case SAA7134_BOARD_BEHOLD_M6:
  59         case SAA7134_BOARD_BEHOLD_M63:
  60         case SAA7134_BOARD_BEHOLD_M6_EXTRA:
  61                 leading_null_bytes = 1;
  62                 break;
  63         }
  64         saa_call_all(dev, core, init, leading_null_bytes);
  65         /* Unmute audio */
  66         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
  67                         saa_readb(SAA7134_AUDIO_MUTE_CTRL) & ~(1 << 6));
  68         dev->empress_started = 1;
  69         return 0;
  70 }
  71
  72 static void stop_streaming(struct vb2_queue *vq)
  73 {
  74         struct saa7134_dmaqueue *dmaq = vq->drv_priv;
  75         struct saa7134_dev *dev = dmaq->dev;
  76
  77         saa7134_ts_stop_streaming(vq);
  78         saa_writeb(SAA7134_SPECIAL_MODE, 0x00);
  79         msleep(20);
  80         saa_writeb(SAA7134_SPECIAL_MODE, 0x01);
  81         msleep(100);
  82         /* Mute audio */
  83         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
  84                         saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6));
  85         dev->empress_started = 0;
  86 }
  87
  88 static struct vb2_ops saa7134_empress_qops = {
  89         .queue_setup    = saa7134_ts_queue_setup,
  90         .buf_init       = saa7134_ts_buffer_init,
  91         .buf_prepare    = saa7134_ts_buffer_prepare,
  92         .buf_queue      = saa7134_vb2_buffer_queue,
  93         .wait_prepare   = vb2_ops_wait_prepare,
  94         .wait_finish    = vb2_ops_wait_finish,
  95         .start_streaming = start_streaming,
  96         .stop_streaming = stop_streaming,
  97 };
  98
  99 /* ------------------------------------------------------------------ */
 100
 101 static int empress_enum_fmt_vid_cap(struct file *file, void  *priv,
 102                                         struct v4l2_fmtdesc *f)
 103 {
 104         if (f->index != 0)
 105                 return -EINVAL;
 106
 107         strlcpy(f->description, "MPEG TS", sizeof(f->description));
 108         f->pixelformat = V4L2_PIX_FMT_MPEG;
 109         f->flags = V4L2_FMT_FLAG_COMPRESSED;
 110         return 0;
 111 }
 112
 113 static int empress_g_fmt_vid_cap(struct file *file, void *priv,
 114                                 struct v4l2_format *f)
 115 {
 116         struct saa7134_dev *dev = video_drvdata(file);
 117         struct v4l2_subdev_format fmt = {
 118                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 119         };
 120         struct v4l2_mbus_framefmt *mbus_fmt = &fmt.format;
 121
 122         saa_call_all(dev, pad, get_fmt, NULL, &fmt);
 123
 124         v4l2_fill_pix_format(&f->fmt.pix, mbus_fmt);
 125         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 126         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 127         f->fmt.pix.bytesperline = 0;
 128
 129         return 0;
 130 }
 131
 132 static int empress_s_fmt_vid_cap(struct file *file, void *priv,
 133                                 struct v4l2_format *f)
 134 {
 135         struct saa7134_dev *dev = video_drvdata(file);
 136         struct v4l2_subdev_format format = {
 137                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 138         };
 139
 140         v4l2_fill_mbus_format(&format.format, &f->fmt.pix, MEDIA_BUS_FMT_FIXED);
 141         saa_call_all(dev, pad, set_fmt, NULL, &format);
 142         v4l2_fill_pix_format(&f->fmt.pix, &format.format);
 143
 144         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 145         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 146         f->fmt.pix.bytesperline = 0;
 147
 148         return 0;
 149 }
 150
 151 static int empress_try_fmt_vid_cap(struct file *file, void *priv,
 152                                 struct v4l2_format *f)
 153 {
 154         struct saa7134_dev *dev = video_drvdata(file);
 155         struct v4l2_subdev_pad_config pad_cfg;
 156         struct v4l2_subdev_format format = {
 157                 .which = V4L2_SUBDEV_FORMAT_TRY,
 158         };
 159
 160         v4l2_fill_mbus_format(&format.format, &f->fmt.pix, MEDIA_BUS_FMT_FIXED);
 161         saa_call_all(dev, pad, set_fmt, &pad_cfg, &format);
 162         v4l2_fill_pix_format(&f->fmt.pix, &format.format);
 163
 164         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 165         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 166         f->fmt.pix.bytesperline = 0;
 167
 168         return 0;
 169 }
 170
 171 static const struct v4l2_file_operations ts_fops =
 172 {
 173         .owner    = THIS_MODULE,
 174         .open     = v4l2_fh_open,
 175         .release  = vb2_fop_release,
 176         .read     = vb2_fop_read,
 177         .poll     = vb2_fop_poll,
 178         .mmap     = vb2_fop_mmap,
 179         .unlocked_ioctl = video_ioctl2,
 180 };
 181
 182 static const struct v4l2_ioctl_ops ts_ioctl_ops = {
 183         .vidioc_querycap                = saa7134_querycap,
 184         .vidioc_enum_fmt_vid_cap        = empress_enum_fmt_vid_cap,
 185         .vidioc_try_fmt_vid_cap         = empress_try_fmt_vid_cap,
 186         .vidioc_s_fmt_vid_cap           = empress_s_fmt_vid_cap,
 187         .vidioc_g_fmt_vid_cap           = empress_g_fmt_vid_cap,
 188         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
 189         .vidioc_querybuf                = vb2_ioctl_querybuf,
 190         .vidioc_qbuf                    = vb2_ioctl_qbuf,
 191         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
 192         .vidioc_streamon                = vb2_ioctl_streamon,
 193         .vidioc_streamoff               = vb2_ioctl_streamoff,
 194         .vidioc_g_frequency             = saa7134_g_frequency,
 195         .vidioc_s_frequency             = saa7134_s_frequency,
 196         .vidioc_g_tuner                 = saa7134_g_tuner,
 197         .vidioc_s_tuner                 = saa7134_s_tuner,
 198         .vidioc_enum_input              = saa7134_enum_input,
 199         .vidioc_g_input                 = saa7134_g_input,
 200         .vidioc_s_input                 = saa7134_s_input,
 201         .vidioc_s_std                   = saa7134_s_std,
 202         .vidioc_g_std                   = saa7134_g_std,
 203         .vidioc_querystd                = saa7134_querystd,
 204         .vidioc_log_status              = v4l2_ctrl_log_status,
 205         .vidioc_subscribe_event         = v4l2_ctrl_subscribe_event,
 206         .vidioc_unsubscribe_event       = v4l2_event_unsubscribe,
 207 };
 208
 209 /* ----------------------------------------------------------- */
 210
 211 static struct video_device saa7134_empress_template = {
 212         .name          = "saa7134-empress",
 213         .fops          = &ts_fops,
 214         .ioctl_ops     = &ts_ioctl_ops,
 215
 216         .tvnorms                        = SAA7134_NORMS,
 217 };
 218
 219 static void empress_signal_update(struct work_struct *work)
 220 {
 221         struct saa7134_dev* dev =
 222                 container_of(work, struct saa7134_dev, empress_workqueue);
 223
 224         if (dev->nosignal) {
 225                 pr_debug("no video signal\n");
 226         } else {
 227                 pr_debug("video signal acquired\n");
 228         }
 229 }
 230
 231 static void empress_signal_change(struct saa7134_dev *dev)
 232 {
 233         schedule_work(&dev->empress_workqueue);
 234 }
 235
 236 static bool empress_ctrl_filter(const struct v4l2_ctrl *ctrl)
 237 {
 238         switch (ctrl->id) {
 239         case V4L2_CID_BRIGHTNESS:
 240         case V4L2_CID_HUE:
 241         case V4L2_CID_CONTRAST:
 242         case V4L2_CID_SATURATION:
 243         case V4L2_CID_AUDIO_MUTE:
 244         case V4L2_CID_AUDIO_VOLUME:
 245         case V4L2_CID_PRIVATE_INVERT:
 246         case V4L2_CID_PRIVATE_AUTOMUTE:
 247                 return true;
 248         default:
 249                 return false;
 250         }
 251 }
 252
 253 static int empress_init(struct saa7134_dev *dev)
 254 {
 255         struct v4l2_ctrl_handler *hdl = &dev->empress_ctrl_handler;
 256         struct vb2_queue *q;
 257         int err;
 258
 259         pr_debug("%s: %s\n", dev->name, __func__);
 260         dev->empress_dev = video_device_alloc();
 261         if (NULL == dev->empress_dev)
 262                 return -ENOMEM;
 263         *(dev->empress_dev) = saa7134_empress_template;
 264         dev->empress_dev->v4l2_dev  = &dev->v4l2_dev;
 265         dev->empress_dev->release = video_device_release;
 266         dev->empress_dev->lock = &dev->lock;
 267         snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
 268                  "%s empress (%s)", dev->name,
 269                  saa7134_boards[dev->board].name);
 270         v4l2_ctrl_handler_init(hdl, 21);
 271         v4l2_ctrl_add_handler(hdl, &dev->ctrl_handler, empress_ctrl_filter);
 272         if (dev->empress_sd)
 273                 v4l2_ctrl_add_handler(hdl, dev->empress_sd->ctrl_handler, NULL);
 274         if (hdl->error) {
 275                 video_device_release(dev->empress_dev);
 276                 return hdl->error;
 277         }
 278         dev->empress_dev->ctrl_handler = hdl;
 279
 280         INIT_WORK(&dev->empress_workqueue, empress_signal_update);
 281
 282         q = &dev->empress_vbq;
 283         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 284         /*
 285          * Do not add VB2_USERPTR: the saa7134 DMA engine cannot handle
 286          * transfers that do not start at the beginning of a page. A USERPTR
 287          * can start anywhere in a page, so USERPTR support is a no-go.
 288          */
 289         q->io_modes = VB2_MMAP | VB2_READ;
 290         q->drv_priv = &dev->ts_q;
 291         q->ops = &saa7134_empress_qops;
 292         q->gfp_flags = GFP_DMA32;
 293         q->mem_ops = &vb2_dma_sg_memops;
 294         q->buf_struct_size = sizeof(struct saa7134_buf);
 295         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 296         q->lock = &dev->lock;
 297         err = vb2_queue_init(q);
 298         if (err)
 299                 return err;
 300         dev->empress_dev->queue = q;
 301
 302         video_set_drvdata(dev->empress_dev, dev);
 303         err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
 304                                     empress_nr[dev->nr]);
 305         if (err < 0) {
 306                 pr_info("%s: can't register video device\n",
 307                        dev->name);
 308                 video_device_release(dev->empress_dev);
 309                 dev->empress_dev = NULL;
 310                 return err;
 311         }
 312         pr_info("%s: registered device %s [mpeg]\n",
 313                dev->name, video_device_node_name(dev->empress_dev));
 314
 315         empress_signal_update(&dev->empress_workqueue);
 316         return 0;
 317 }
 318
 319 static int empress_fini(struct saa7134_dev *dev)
 320 {
 321         pr_debug("%s: %s\n", dev->name, __func__);
 322
 323         if (NULL == dev->empress_dev)
 324                 return 0;
 325         flush_work(&dev->empress_workqueue);
 326         video_unregister_device(dev->empress_dev);
 327         vb2_queue_release(&dev->empress_vbq);
 328         v4l2_ctrl_handler_free(&dev->empress_ctrl_handler);
 329         dev->empress_dev = NULL;
 330         return 0;
 331 }
 332
 333 static struct saa7134_mpeg_ops empress_ops = {
 334         .type          = SAA7134_MPEG_EMPRESS,
 335         .init          = empress_init,
 336         .fini          = empress_fini,
 337         .signal_change = empress_signal_change,
 338 };
 339
 340 static int __init empress_register(void)
 341 {
 342         return saa7134_ts_register(&empress_ops);
 343 }
 344
 345 static void __exit empress_unregister(void)
 346 {
 347         saa7134_ts_unregister(&empress_ops);
 348 }
 349
 350 module_init(empress_register);
 351 module_exit(empress_unregister);