LXR linux/drivers/media/pci/cx18/cx18-controls.c

   1/*
   2 *  cx18 ioctl control functions
   3 *
   4 *  Derived from ivtv-controls.c
   5 *
   6 *  Copyright (C) 2007  Hans Verkuil <hverkuil@xs4all.nl>
   7 *
   8 *  This program is free software; you can redistribute it and/or modify
   9 *  it under the terms of the GNU General Public License as published by
  10 *  the Free Software Foundation; either version 2 of the License, or
  11 *  (at your option) any later version.
  12 *
  13 *  This program is distributed in the hope that it will be useful,
  14 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 *  GNU General Public License for more details.
  17 */
  18#include <linux/kernel.h>
  19#include <linux/slab.h>
  20
  21#include "cx18-driver.h"
  22#include "cx18-cards.h"
  23#include "cx18-ioctl.h"
  24#include "cx18-audio.h"
  25#include "cx18-mailbox.h"
  26#include "cx18-controls.h"
  27
  28static int cx18_s_stream_vbi_fmt(struct cx2341x_handler *cxhdl, u32 fmt)
  29{
  30        struct cx18 *cx = container_of(cxhdl, struct cx18, cxhdl);
  31        int type = cxhdl->stream_type->val;
  32
  33        if (atomic_read(&cx->ana_capturing) > 0)
  34                return -EBUSY;
  35
  36        if (fmt != V4L2_MPEG_STREAM_VBI_FMT_IVTV ||
  37            !(type == V4L2_MPEG_STREAM_TYPE_MPEG2_PS ||
  38              type == V4L2_MPEG_STREAM_TYPE_MPEG2_DVD ||
  39              type == V4L2_MPEG_STREAM_TYPE_MPEG2_SVCD)) {
  40                /* Only IVTV fmt VBI insertion & only MPEG-2 PS type streams */
  41                cx->vbi.insert_mpeg = V4L2_MPEG_STREAM_VBI_FMT_NONE;
  42                CX18_DEBUG_INFO("disabled insertion of sliced VBI data into the MPEG stream\n");
  43                return 0;
  44        }
  45
  46        /* Allocate sliced VBI buffers if needed. */
  47        if (cx->vbi.sliced_mpeg_data[0] == NULL) {
  48                int i;
  49
  50                for (i = 0; i < CX18_VBI_FRAMES; i++) {
  51                        cx->vbi.sliced_mpeg_data[i] =
  52                               kmalloc(CX18_SLICED_MPEG_DATA_BUFSZ, GFP_KERNEL);
  53                        if (cx->vbi.sliced_mpeg_data[i] == NULL) {
  54                                while (--i >= 0) {
  55                                        kfree(cx->vbi.sliced_mpeg_data[i]);
  56                                        cx->vbi.sliced_mpeg_data[i] = NULL;
  57                                }
  58                                cx->vbi.insert_mpeg =
  59                                                  V4L2_MPEG_STREAM_VBI_FMT_NONE;
  60                                CX18_WARN("Unable to allocate buffers for sliced VBI data insertion\n");
  61                                return -ENOMEM;
  62                        }
  63                }
  64        }
  65
  66        cx->vbi.insert_mpeg = fmt;
  67        CX18_DEBUG_INFO("enabled insertion of sliced VBI data into the MPEG PS,when sliced VBI is enabled\n");
  68
  69        /*
  70         * If our current settings have no lines set for capture, store a valid,
  71         * default set of service lines to capture, in our current settings.
  72         */
  73        if (cx18_get_service_set(cx->vbi.sliced_in) == 0) {
  74                if (cx->is_60hz)
  75                        cx->vbi.sliced_in->service_set =
  76                                                        V4L2_SLICED_CAPTION_525;
  77                else
  78                        cx->vbi.sliced_in->service_set = V4L2_SLICED_WSS_625;
  79                cx18_expand_service_set(cx->vbi.sliced_in, cx->is_50hz);
  80        }
  81        return 0;
  82}
  83
  84static int cx18_s_video_encoding(struct cx2341x_handler *cxhdl, u32 val)
  85{
  86        struct cx18 *cx = container_of(cxhdl, struct cx18, cxhdl);
  87        int is_mpeg1 = val == V4L2_MPEG_VIDEO_ENCODING_MPEG_1;
  88        struct v4l2_subdev_format format = {
  89                .which = V4L2_SUBDEV_FORMAT_ACTIVE,
  90        };
  91        struct v4l2_mbus_framefmt *fmt = &format.format;
  92
  93        /* fix videodecoder resolution */
  94        fmt->width = cxhdl->width / (is_mpeg1 ? 2 : 1);
  95        fmt->height = cxhdl->height;
  96        fmt->code = MEDIA_BUS_FMT_FIXED;
  97        v4l2_subdev_call(cx->sd_av, pad, set_fmt, NULL, &format);
  98        return 0;
  99}
 100
 101static int cx18_s_audio_sampling_freq(struct cx2341x_handler *cxhdl, u32 idx)
 102{
 103        static const u32 freqs[3] = { 44100, 48000, 32000 };
 104        struct cx18 *cx = container_of(cxhdl, struct cx18, cxhdl);
 105
 106        /* The audio clock of the digitizer must match the codec sample
 107           rate otherwise you get some very strange effects. */
 108        if (idx < ARRAY_SIZE(freqs))
 109                cx18_call_all(cx, audio, s_clock_freq, freqs[idx]);
 110        return 0;
 111}
 112
 113static int cx18_s_audio_mode(struct cx2341x_handler *cxhdl, u32 val)
 114{
 115        struct cx18 *cx = container_of(cxhdl, struct cx18, cxhdl);
 116
 117        cx->dualwatch_stereo_mode = val;
 118        return 0;
 119}
 120
 121const struct cx2341x_handler_ops cx18_cxhdl_ops = {
 122        .s_audio_mode = cx18_s_audio_mode,
 123        .s_audio_sampling_freq = cx18_s_audio_sampling_freq,
 124        .s_video_encoding = cx18_s_video_encoding,
 125        .s_stream_vbi_fmt = cx18_s_stream_vbi_fmt,
 126};
 127