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
  16 #include "saa7134.h"
  17 #include "saa7134-reg.h"
  18
  19 #include <linux/init.h>
  20 #include <linux/list.h>
  21 #include <linux/module.h>
  22 #include <linux/kernel.h>
  23 #include <linux/delay.h>
  24
  25 #include <media/v4l2-common.h>
  26 #include <media/v4l2-event.h>
  27
  28 /* ------------------------------------------------------------------ */
  29
  30 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
  31 MODULE_LICENSE("GPL");
  32
  33 static unsigned int empress_nr[] = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET };
  34
  35 module_param_array(empress_nr, int, NULL, 0444);
  36 MODULE_PARM_DESC(empress_nr,"ts device number");
  37
  38 /* ------------------------------------------------------------------ */
  39
  40 static int start_streaming(struct vb2_queue *vq, unsigned int count)
  41 {
  42         struct saa7134_dmaqueue *dmaq = vq->drv_priv;
  43         struct saa7134_dev *dev = dmaq->dev;
  44         u32 leading_null_bytes = 0;
  45         int err;
  46
  47         err = saa7134_ts_start_streaming(vq, count);
  48         if (err)
  49                 return err;
  50
  51         /* If more cards start to need this, then this
  52            should probably be added to the card definitions. */
  53         switch (dev->board) {
  54         case SAA7134_BOARD_BEHOLD_M6:
  55         case SAA7134_BOARD_BEHOLD_M63:
  56         case SAA7134_BOARD_BEHOLD_M6_EXTRA:
  57                 leading_null_bytes = 1;
  58                 break;
  59         }
  60         saa_call_all(dev, core, init, leading_null_bytes);
  61         /* Unmute audio */
  62         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
  63                         saa_readb(SAA7134_AUDIO_MUTE_CTRL) & ~(1 << 6));
  64         dev->empress_started = 1;
  65         return 0;
  66 }
  67
  68 static void stop_streaming(struct vb2_queue *vq)
  69 {
  70         struct saa7134_dmaqueue *dmaq = vq->drv_priv;
  71         struct saa7134_dev *dev = dmaq->dev;
  72
  73         saa7134_ts_stop_streaming(vq);
  74         saa_writeb(SAA7134_SPECIAL_MODE, 0x00);
  75         msleep(20);
  76         saa_writeb(SAA7134_SPECIAL_MODE, 0x01);
  77         msleep(100);
  78         /* Mute audio */
  79         saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
  80                         saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6));
  81         dev->empress_started = 0;
  82 }
  83
  84 static const struct vb2_ops saa7134_empress_qops = {
  85         .queue_setup    = saa7134_ts_queue_setup,
  86         .buf_init       = saa7134_ts_buffer_init,
  87         .buf_prepare    = saa7134_ts_buffer_prepare,
  88         .buf_queue      = saa7134_vb2_buffer_queue,
  89         .wait_prepare   = vb2_ops_wait_prepare,
  90         .wait_finish    = vb2_ops_wait_finish,
  91         .start_streaming = start_streaming,
  92         .stop_streaming = stop_streaming,
  93 };
  94
  95 /* ------------------------------------------------------------------ */
  96
  97 static int empress_enum_fmt_vid_cap(struct file *file, void  *priv,
  98                                         struct v4l2_fmtdesc *f)
  99 {
 100         if (f->index != 0)
 101                 return -EINVAL;
 102
 103         strscpy(f->description, "MPEG TS", sizeof(f->description));
 104         f->pixelformat = V4L2_PIX_FMT_MPEG;
 105         f->flags = V4L2_FMT_FLAG_COMPRESSED;
 106         return 0;
 107 }
 108
 109 static int empress_g_fmt_vid_cap(struct file *file, void *priv,
 110                                 struct v4l2_format *f)
 111 {
 112         struct saa7134_dev *dev = video_drvdata(file);
 113         struct v4l2_subdev_format fmt = {
 114                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 115         };
 116         struct v4l2_mbus_framefmt *mbus_fmt = &fmt.format;
 117
 118         saa_call_all(dev, pad, get_fmt, NULL, &fmt);
 119
 120         v4l2_fill_pix_format(&f->fmt.pix, mbus_fmt);
 121         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 122         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 123         f->fmt.pix.bytesperline = 0;
 124
 125         return 0;
 126 }
 127
 128 static int empress_s_fmt_vid_cap(struct file *file, void *priv,
 129                                 struct v4l2_format *f)
 130 {
 131         struct saa7134_dev *dev = video_drvdata(file);
 132         struct v4l2_subdev_format format = {
 133                 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
 134         };
 135
 136         v4l2_fill_mbus_format(&format.format, &f->fmt.pix, MEDIA_BUS_FMT_FIXED);
 137         saa_call_all(dev, pad, set_fmt, NULL, &format);
 138         v4l2_fill_pix_format(&f->fmt.pix, &format.format);
 139
 140         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 141         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 142         f->fmt.pix.bytesperline = 0;
 143
 144         return 0;
 145 }
 146
 147 static int empress_try_fmt_vid_cap(struct file *file, void *priv,
 148                                 struct v4l2_format *f)
 149 {
 150         struct saa7134_dev *dev = video_drvdata(file);
 151         struct v4l2_subdev_pad_config pad_cfg;
 152         struct v4l2_subdev_format format = {
 153                 .which = V4L2_SUBDEV_FORMAT_TRY,
 154         };
 155
 156         v4l2_fill_mbus_format(&format.format, &f->fmt.pix, MEDIA_BUS_FMT_FIXED);
 157         saa_call_all(dev, pad, set_fmt, &pad_cfg, &format);
 158         v4l2_fill_pix_format(&f->fmt.pix, &format.format);
 159
 160         f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
 161         f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;
 162         f->fmt.pix.bytesperline = 0;
 163
 164         return 0;
 165 }
 166
 167 static const struct v4l2_file_operations ts_fops =
 168 {
 169         .owner    = THIS_MODULE,
 170         .open     = v4l2_fh_open,
 171         .release  = vb2_fop_release,
 172         .read     = vb2_fop_read,
 173         .poll     = vb2_fop_poll,
 174         .mmap     = vb2_fop_mmap,
 175         .unlocked_ioctl = video_ioctl2,
 176 };
 177
 178 static const struct v4l2_ioctl_ops ts_ioctl_ops = {
 179         .vidioc_querycap                = saa7134_querycap,
 180         .vidioc_enum_fmt_vid_cap        = empress_enum_fmt_vid_cap,
 181         .vidioc_try_fmt_vid_cap         = empress_try_fmt_vid_cap,
 182         .vidioc_s_fmt_vid_cap           = empress_s_fmt_vid_cap,
 183         .vidioc_g_fmt_vid_cap           = empress_g_fmt_vid_cap,
 184         .vidioc_reqbufs                 = vb2_ioctl_reqbufs,
 185         .vidioc_querybuf                = vb2_ioctl_querybuf,
 186         .vidioc_qbuf                    = vb2_ioctl_qbuf,
 187         .vidioc_dqbuf                   = vb2_ioctl_dqbuf,
 188         .vidioc_expbuf                  = vb2_ioctl_expbuf,
 189         .vidioc_streamon                = vb2_ioctl_streamon,
 190         .vidioc_streamoff               = vb2_ioctl_streamoff,
 191         .vidioc_g_frequency             = saa7134_g_frequency,
 192         .vidioc_s_frequency             = saa7134_s_frequency,
 193         .vidioc_g_tuner                 = saa7134_g_tuner,
 194         .vidioc_s_tuner                 = saa7134_s_tuner,
 195         .vidioc_enum_input              = saa7134_enum_input,
 196         .vidioc_g_input                 = saa7134_g_input,
 197         .vidioc_s_input                 = saa7134_s_input,
 198         .vidioc_s_std                   = saa7134_s_std,
 199         .vidioc_g_std                   = saa7134_g_std,
 200         .vidioc_querystd                = saa7134_querystd,
 201         .vidioc_log_status              = v4l2_ctrl_log_status,
 202         .vidioc_subscribe_event         = v4l2_ctrl_subscribe_event,
 203         .vidioc_unsubscribe_event       = v4l2_event_unsubscribe,
 204 };
 205
 206 /* ----------------------------------------------------------- */
 207
 208 static const struct video_device saa7134_empress_template = {
 209         .name          = "saa7134-empress",
 210         .fops          = &ts_fops,
 211         .ioctl_ops     = &ts_ioctl_ops,
 212
 213         .tvnorms                        = SAA7134_NORMS,
 214 };
 215
 216 static void empress_signal_update(struct work_struct *work)
 217 {
 218         struct saa7134_dev* dev =
 219                 container_of(work, struct saa7134_dev, empress_workqueue);
 220
 221         if (dev->nosignal) {
 222                 pr_debug("no video signal\n");
 223         } else {
 224                 pr_debug("video signal acquired\n");
 225         }
 226 }
 227
 228 static void empress_signal_change(struct saa7134_dev *dev)
 229 {
 230         schedule_work(&dev->empress_workqueue);
 231 }
 232
 233 static bool empress_ctrl_filter(const struct v4l2_ctrl *ctrl)
 234 {
 235         switch (ctrl->id) {
 236         case V4L2_CID_BRIGHTNESS:
 237         case V4L2_CID_HUE:
 238         case V4L2_CID_CONTRAST:
 239         case V4L2_CID_SATURATION:
 240         case V4L2_CID_AUDIO_MUTE:
 241         case V4L2_CID_AUDIO_VOLUME:
 242         case V4L2_CID_PRIVATE_INVERT:
 243         case V4L2_CID_PRIVATE_AUTOMUTE:
 244                 return true;
 245         default:
 246                 return false;
 247         }
 248 }
 249
 250 static int empress_init(struct saa7134_dev *dev)
 251 {
 252         struct v4l2_ctrl_handler *hdl = &dev->empress_ctrl_handler;
 253         struct vb2_queue *q;
 254         int err;
 255
 256         pr_debug("%s: %s\n", dev->name, __func__);
 257         dev->empress_dev = video_device_alloc();
 258         if (NULL == dev->empress_dev)
 259                 return -ENOMEM;
 260         *(dev->empress_dev) = saa7134_empress_template;
 261         dev->empress_dev->v4l2_dev  = &dev->v4l2_dev;
 262         dev->empress_dev->release = video_device_release;
 263         dev->empress_dev->lock = &dev->lock;
 264         snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
 265                  "%s empress (%s)", dev->name,
 266                  saa7134_boards[dev->board].name);
 267         v4l2_ctrl_handler_init(hdl, 21);
 268         v4l2_ctrl_add_handler(hdl, &dev->ctrl_handler, empress_ctrl_filter, false);
 269         if (dev->empress_sd)
 270                 v4l2_ctrl_add_handler(hdl, dev->empress_sd->ctrl_handler, NULL, true);
 271         if (hdl->error) {
 272                 video_device_release(dev->empress_dev);
 273                 return hdl->error;
 274         }
 275         dev->empress_dev->ctrl_handler = hdl;
 276
 277         INIT_WORK(&dev->empress_workqueue, empress_signal_update);
 278
 279         q = &dev->empress_vbq;
 280         q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 281         /*
 282          * Do not add VB2_USERPTR: the saa7134 DMA engine cannot handle
 283          * transfers that do not start at the beginning of a page. A USERPTR
 284          * can start anywhere in a page, so USERPTR support is a no-go.
 285          */
 286         q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ;
 287         q->drv_priv = &dev->ts_q;
 288         q->ops = &saa7134_empress_qops;
 289         q->gfp_flags = GFP_DMA32;
 290         q->mem_ops = &vb2_dma_sg_memops;
 291         q->buf_struct_size = sizeof(struct saa7134_buf);
 292         q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 293         q->lock = &dev->lock;
 294         q->dev = &dev->pci->dev;
 295         err = vb2_queue_init(q);
 296         if (err)
 297                 return err;
 298         dev->empress_dev->queue = q;
 299
 300         video_set_drvdata(dev->empress_dev, dev);
 301         err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
 302                                     empress_nr[dev->nr]);
 303         if (err < 0) {
 304                 pr_info("%s: can't register video device\n",
 305                        dev->name);
 306                 video_device_release(dev->empress_dev);
 307                 dev->empress_dev = NULL;
 308                 return err;
 309         }
 310         pr_info("%s: registered device %s [mpeg]\n",
 311                dev->name, video_device_node_name(dev->empress_dev));
 312
 313         empress_signal_update(&dev->empress_workqueue);
 314         return 0;
 315 }
 316
 317 static int empress_fini(struct saa7134_dev *dev)
 318 {
 319         pr_debug("%s: %s\n", dev->name, __func__);
 320
 321         if (NULL == dev->empress_dev)
 322                 return 0;
 323         flush_work(&dev->empress_workqueue);
 324         video_unregister_device(dev->empress_dev);
 325         vb2_queue_release(&dev->empress_vbq);
 326         v4l2_ctrl_handler_free(&dev->empress_ctrl_handler);
 327         dev->empress_dev = NULL;
 328         return 0;
 329 }
 330
 331 static struct saa7134_mpeg_ops empress_ops = {
 332         .type          = SAA7134_MPEG_EMPRESS,
 333         .init          = empress_init,
 334         .fini          = empress_fini,
 335         .signal_change = empress_signal_change,
 336 };
 337
 338 static int __init empress_register(void)
 339 {
 340         return saa7134_ts_register(&empress_ops);
 341 }
 342
 343 static void __exit empress_unregister(void)
 344 {
 345         saa7134_ts_unregister(&empress_ops);
 346 }
 347
 348 module_init(empress_register);
 349 module_exit(empress_unregister);