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