1 /*
2  *
3  *
4  *  Copyright (C) 2005 Mike Isely <isely@pobox.com>
5  *  Copyright (C) 2004 Aurelien Alleaume <slts@free.fr>
6  *
7  *  This program is free software; you can redistribute it and/or modify
8  *  it under the terms of the GNU General Public License as published by
9  *  the Free Software Foundation; either version 2 of the License
10  *
11  *  This program is distributed in the hope that it will be useful,
12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  *  GNU General Public License for more details.
15  *
16  */
17 
18 /*
19 
20    This source file is specifically designed to interface with the
21    saa711x support that is available in the v4l available starting
22    with linux 2.6.15.
23 
24 */
25 
26 #include "pvrusb2-video-v4l.h"
27 
28 
29 
30 #include "pvrusb2-hdw-internal.h"
31 #include "pvrusb2-debug.h"
32 #include <linux/videodev2.h>
33 #include <media/v4l2-common.h>
34 #include <media/i2c/saa7115.h>
35 #include <linux/errno.h>
36 
37 struct routing_scheme {
38 	const int *def;
39 	unsigned int cnt;
40 };
41 
42 
43 static const int routing_scheme0[] = {
44 	[PVR2_CVAL_INPUT_TV] = SAA7115_COMPOSITE4,
45 	/* In radio mode, we mute the video, but point at one
46 	   spot just to stay consistent */
47 	[PVR2_CVAL_INPUT_RADIO] = SAA7115_COMPOSITE5,
48 	[PVR2_CVAL_INPUT_COMPOSITE] = SAA7115_COMPOSITE5,
49 	[PVR2_CVAL_INPUT_SVIDEO] =  SAA7115_SVIDEO2,
50 };
51 
52 static const struct routing_scheme routing_def0 = {
53 	.def = routing_scheme0,
54 	.cnt = ARRAY_SIZE(routing_scheme0),
55 };
56 
57 static const int routing_scheme1[] = {
58 	[PVR2_CVAL_INPUT_TV] = SAA7115_COMPOSITE4,
59 	[PVR2_CVAL_INPUT_RADIO] = SAA7115_COMPOSITE5,
60 	[PVR2_CVAL_INPUT_COMPOSITE] = SAA7115_COMPOSITE3,
61 	[PVR2_CVAL_INPUT_SVIDEO] =  SAA7115_SVIDEO2, /* or SVIDEO0, it seems */
62 };
63 
64 static const struct routing_scheme routing_def1 = {
65 	.def = routing_scheme1,
66 	.cnt = ARRAY_SIZE(routing_scheme1),
67 };
68 
69 static const struct routing_scheme *routing_schemes[] = {
70 	[PVR2_ROUTING_SCHEME_HAUPPAUGE] = &routing_def0,
71 	[PVR2_ROUTING_SCHEME_ONAIR] = &routing_def1,
72 };
73 
74 void pvr2_saa7115_subdev_update(struct pvr2_hdw *hdw, struct v4l2_subdev *sd)
75 {
76 	if (hdw->input_dirty || hdw->force_dirty) {
77 		const struct routing_scheme *sp;
78 		unsigned int sid = hdw->hdw_desc->signal_routing_scheme;
79 		u32 input;
80 
81 		pvr2_trace(PVR2_TRACE_CHIPS, "subdev v4l2 set_input(%d)",
82 			   hdw->input_val);
83 
84 		sp = (sid < ARRAY_SIZE(routing_schemes)) ?
85 			routing_schemes[sid] : NULL;
86 		if ((sp == NULL) ||
87 		    (hdw->input_val < 0) ||
88 		    (hdw->input_val >= sp->cnt)) {
89 			pvr2_trace(PVR2_TRACE_ERROR_LEGS,
90 				   "*** WARNING *** subdev v4l2 set_input: Invalid routing scheme (%u) and/or input (%d)",
91 				   sid, hdw->input_val);
92 			return;
93 		}
94 		input = sp->def[hdw->input_val];
95 		sd->ops->video->s_routing(sd, input, 0, 0);
96 	}
97 }
98