1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* cx18 audio-related functions
*
* Derived from ivtv-audio.c
*
* Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
*/
#include "cx18-driver.h"
#include "cx18-io.h"
#include "cx18-cards.h"
#include "cx18-audio.h"
#define CX18_AUDIO_ENABLE 0xc72014
#define CX18_AI1_MUX_MASK 0x30
#define CX18_AI1_MUX_I2S1 0x00
#define CX18_AI1_MUX_I2S2 0x10
#define CX18_AI1_MUX_843_I2S 0x20
/* Selects the audio input and output according to the current
settings. */
int cx18_audio_set_io(struct cx18 *cx)
{
const struct cx18_card_audio_input *in;
u32 u, v;
int err;
/* Determine which input to use */
if (test_bit(CX18_F_I_RADIO_USER, &cx->i_flags))
in = &cx->card->radio_input;
else
in = &cx->card->audio_inputs[cx->audio_input];
/* handle muxer chips */
v4l2_subdev_call(cx->sd_extmux, audio, s_routing,
(u32) in->muxer_input, 0, 0);
err = cx18_call_hw_err(cx, cx->card->hw_audio_ctrl,
audio, s_routing, in->audio_input, 0, 0);
if (err)
return err;
/* FIXME - this internal mux should be abstracted to a subdev */
u = cx18_read_reg(cx, CX18_AUDIO_ENABLE);
v = u & ~CX18_AI1_MUX_MASK;
switch (in->audio_input) {
case CX18_AV_AUDIO_SERIAL1:
v |= CX18_AI1_MUX_I2S1;
break;
case CX18_AV_AUDIO_SERIAL2:
v |= CX18_AI1_MUX_I2S2;
break;
default:
v |= CX18_AI1_MUX_843_I2S;
break;
}
if (v == u) {
/* force a toggle of some AI1 MUX control bits */
u &= ~CX18_AI1_MUX_MASK;
switch (in->audio_input) {
case CX18_AV_AUDIO_SERIAL1:
u |= CX18_AI1_MUX_843_I2S;
break;
case CX18_AV_AUDIO_SERIAL2:
u |= CX18_AI1_MUX_843_I2S;
break;
default:
u |= CX18_AI1_MUX_I2S1;
break;
}
cx18_write_reg_expect(cx, u | 0xb00, CX18_AUDIO_ENABLE,
u, CX18_AI1_MUX_MASK);
}
cx18_write_reg_expect(cx, v | 0xb00, CX18_AUDIO_ENABLE,
v, CX18_AI1_MUX_MASK);
return 0;
}
|
