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_subdev_format format = {
97 		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
98 	};
99 	struct v4l2_mbus_framefmt *fmt = &format.format;
100 
101 	/* fix videodecoder resolution */
102 	fmt->width = cxhdl->width / (is_mpeg1 ? 2 : 1);
103 	fmt->height = cxhdl->height;
104 	fmt->code = MEDIA_BUS_FMT_FIXED;
105 	v4l2_subdev_call(cx->sd_av, pad, set_fmt, NULL, &format);
106 	return 0;
107 }
108 
109 static int cx18_s_audio_sampling_freq(struct cx2341x_handler *cxhdl, u32 idx)
110 {
111 	static const u32 freqs[3] = { 44100, 48000, 32000 };
112 	struct cx18 *cx = container_of(cxhdl, struct cx18, cxhdl);
113 
114 	/* The audio clock of the digitizer must match the codec sample
115 	   rate otherwise you get some very strange effects. */
116 	if (idx < ARRAY_SIZE(freqs))
117 		cx18_call_all(cx, audio, s_clock_freq, freqs[idx]);
118 	return 0;
119 }
120 
121 static int cx18_s_audio_mode(struct cx2341x_handler *cxhdl, u32 val)
122 {
123 	struct cx18 *cx = container_of(cxhdl, struct cx18, cxhdl);
124 
125 	cx->dualwatch_stereo_mode = val;
126 	return 0;
127 }
128 
129 const struct cx2341x_handler_ops cx18_cxhdl_ops = {
130 	.s_audio_mode = cx18_s_audio_mode,
131 	.s_audio_sampling_freq = cx18_s_audio_sampling_freq,
132 	.s_video_encoding = cx18_s_video_encoding,
133 	.s_stream_vbi_fmt = cx18_s_stream_vbi_fmt,
134 };
135