Merge branch 'turbostat' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux
[sfrench/cifs-2.6.git] / 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 };