1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  *
4  *  Copyright (C) 2005 Mike Isely <isely@pobox.com>
5  *  Copyright (C) 2004 Aurelien Alleaume <slts@free.fr>
6  */
7 
8 /*
9 
10    This source file is specifically designed to interface with the
11    saa711x support that is available in the v4l available starting
12    with linux 2.6.15.
13 
14 */
15 
16 #include "pvrusb2-video-v4l.h"
17 
18 
19 
20 #include "pvrusb2-hdw-internal.h"
21 #include "pvrusb2-debug.h"
22 #include <linux/videodev2.h>
23 #include <media/v4l2-common.h>
24 #include <media/i2c/saa7115.h>
25 #include <linux/errno.h>
26 
27 struct routing_scheme {
28 	const int *def;
29 	unsigned int cnt;
30 };
31 
32 
33 static const int routing_scheme0[] = {
34 	[PVR2_CVAL_INPUT_TV] = SAA7115_COMPOSITE4,
35 	/* In radio mode, we mute the video, but point at one
36 	   spot just to stay consistent */
37 	[PVR2_CVAL_INPUT_RADIO] = SAA7115_COMPOSITE5,
38 	[PVR2_CVAL_INPUT_COMPOSITE] = SAA7115_COMPOSITE5,
39 	[PVR2_CVAL_INPUT_SVIDEO] =  SAA7115_SVIDEO2,
40 };
41 
42 static const struct routing_scheme routing_def0 = {
43 	.def = routing_scheme0,
44 	.cnt = ARRAY_SIZE(routing_scheme0),
45 };
46 
47 static const int routing_scheme1[] = {
48 	[PVR2_CVAL_INPUT_TV] = SAA7115_COMPOSITE4,
49 	[PVR2_CVAL_INPUT_RADIO] = SAA7115_COMPOSITE5,
50 	[PVR2_CVAL_INPUT_COMPOSITE] = SAA7115_COMPOSITE3,
51 	[PVR2_CVAL_INPUT_SVIDEO] =  SAA7115_SVIDEO2, /* or SVIDEO0, it seems */
52 };
53 
54 static const struct routing_scheme routing_def1 = {
55 	.def = routing_scheme1,
56 	.cnt = ARRAY_SIZE(routing_scheme1),
57 };
58 
59 static const struct routing_scheme *routing_schemes[] = {
60 	[PVR2_ROUTING_SCHEME_HAUPPAUGE] = &routing_def0,
61 	[PVR2_ROUTING_SCHEME_ONAIR] = &routing_def1,
62 };
63 
pvr2_saa7115_subdev_update(struct pvr2_hdw * hdw,struct v4l2_subdev * sd)64 void pvr2_saa7115_subdev_update(struct pvr2_hdw *hdw, struct v4l2_subdev *sd)
65 {
66 	if (hdw->input_dirty || hdw->force_dirty) {
67 		const struct routing_scheme *sp;
68 		unsigned int sid = hdw->hdw_desc->signal_routing_scheme;
69 		u32 input;
70 
71 		pvr2_trace(PVR2_TRACE_CHIPS, "subdev v4l2 set_input(%d)",
72 			   hdw->input_val);
73 
74 		sp = (sid < ARRAY_SIZE(routing_schemes)) ?
75 			routing_schemes[sid] : NULL;
76 		if ((sp == NULL) ||
77 		    (hdw->input_val < 0) ||
78 		    (hdw->input_val >= sp->cnt)) {
79 			pvr2_trace(PVR2_TRACE_ERROR_LEGS,
80 				   "*** WARNING *** subdev v4l2 set_input: Invalid routing scheme (%u) and/or input (%d)",
81 				   sid, hdw->input_val);
82 			return;
83 		}
84 		input = sp->def[hdw->input_val];
85 		sd->ops->video->s_routing(sd, input, 0, 0);
86 	}
87 }
88