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
  28 static 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
  84 static 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
 101 static 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
 113 static 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
 121 const 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 };