Merge branch 'rmobile-latest' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal...
[pandora-kernel.git] / drivers / media / video / 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  *  You should have received a copy of the GNU General Public License
19  *  along with this program; if not, write to the Free Software
20  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
21  *  02111-1307  USA
22  */
23 #include <linux/kernel.h>
24 #include <linux/slab.h>
25
26 #include "cx18-driver.h"
27 #include "cx18-cards.h"
28 #include "cx18-ioctl.h"
29 #include "cx18-audio.h"
30 #include "cx18-mailbox.h"
31 #include "cx18-controls.h"
32
33 static int cx18_s_stream_vbi_fmt(struct cx2341x_handler *cxhdl, u32 fmt)
34 {
35         struct cx18 *cx = container_of(cxhdl, struct cx18, cxhdl);
36         int type = cxhdl->stream_type->val;
37
38         if (atomic_read(&cx->ana_capturing) > 0)
39                 return -EBUSY;
40
41         if (fmt != V4L2_MPEG_STREAM_VBI_FMT_IVTV ||
42             !(type == V4L2_MPEG_STREAM_TYPE_MPEG2_PS ||
43               type == V4L2_MPEG_STREAM_TYPE_MPEG2_DVD ||
44               type == V4L2_MPEG_STREAM_TYPE_MPEG2_SVCD)) {
45                 /* Only IVTV fmt VBI insertion & only MPEG-2 PS type streams */
46                 cx->vbi.insert_mpeg = V4L2_MPEG_STREAM_VBI_FMT_NONE;
47                 CX18_DEBUG_INFO("disabled insertion of sliced VBI data into "
48                                 "the MPEG stream\n");
49                 return 0;
50         }
51
52         /* Allocate sliced VBI buffers if needed. */
53         if (cx->vbi.sliced_mpeg_data[0] == NULL) {
54                 int i;
55
56                 for (i = 0; i < CX18_VBI_FRAMES; i++) {
57                         cx->vbi.sliced_mpeg_data[i] =
58                                kmalloc(CX18_SLICED_MPEG_DATA_BUFSZ, GFP_KERNEL);
59                         if (cx->vbi.sliced_mpeg_data[i] == NULL) {
60                                 while (--i >= 0) {
61                                         kfree(cx->vbi.sliced_mpeg_data[i]);
62                                         cx->vbi.sliced_mpeg_data[i] = NULL;
63                                 }
64                                 cx->vbi.insert_mpeg =
65                                                   V4L2_MPEG_STREAM_VBI_FMT_NONE;
66                                 CX18_WARN("Unable to allocate buffers for "
67                                           "sliced VBI data insertion\n");
68                                 return -ENOMEM;
69                         }
70                 }
71         }
72
73         cx->vbi.insert_mpeg = fmt;
74         CX18_DEBUG_INFO("enabled insertion of sliced VBI data into the MPEG PS,"
75                         "when sliced VBI is enabled\n");
76
77         /*
78          * If our current settings have no lines set for capture, store a valid,
79          * default set of service lines to capture, in our current settings.
80          */
81         if (cx18_get_service_set(cx->vbi.sliced_in) == 0) {
82                 if (cx->is_60hz)
83                         cx->vbi.sliced_in->service_set =
84                                                         V4L2_SLICED_CAPTION_525;
85                 else
86                         cx->vbi.sliced_in->service_set = V4L2_SLICED_WSS_625;
87                 cx18_expand_service_set(cx->vbi.sliced_in, cx->is_50hz);
88         }
89         return 0;
90 }
91
92 static int cx18_s_video_encoding(struct cx2341x_handler *cxhdl, u32 val)
93 {
94         struct cx18 *cx = container_of(cxhdl, struct cx18, cxhdl);
95         int is_mpeg1 = val == V4L2_MPEG_VIDEO_ENCODING_MPEG_1;
96         struct v4l2_mbus_framefmt fmt;
97
98         /* fix videodecoder resolution */
99         fmt.width = cxhdl->width / (is_mpeg1 ? 2 : 1);
100         fmt.height = cxhdl->height;
101         fmt.code = V4L2_MBUS_FMT_FIXED;
102         v4l2_subdev_call(cx->sd_av, video, s_mbus_fmt, &fmt);
103         return 0;
104 }
105
106 static int cx18_s_audio_sampling_freq(struct cx2341x_handler *cxhdl, u32 idx)
107 {
108         static const u32 freqs[3] = { 44100, 48000, 32000 };
109         struct cx18 *cx = container_of(cxhdl, struct cx18, cxhdl);
110
111         /* The audio clock of the digitizer must match the codec sample
112            rate otherwise you get some very strange effects. */
113         if (idx < ARRAY_SIZE(freqs))
114                 cx18_call_all(cx, audio, s_clock_freq, freqs[idx]);
115         return 0;
116 }
117
118 static int cx18_s_audio_mode(struct cx2341x_handler *cxhdl, u32 val)
119 {
120         struct cx18 *cx = container_of(cxhdl, struct cx18, cxhdl);
121
122         cx->dualwatch_stereo_mode = val;
123         return 0;
124 }
125
126 struct cx2341x_handler_ops cx18_cxhdl_ops = {
127         .s_audio_mode = cx18_s_audio_mode,
128         .s_audio_sampling_freq = cx18_s_audio_sampling_freq,
129         .s_video_encoding = cx18_s_video_encoding,
130         .s_stream_vbi_fmt = cx18_s_stream_vbi_fmt,
131 };