]>
git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - drivers/media/video/cx18/cx18-audio.c
2 * cx18 audio-related functions
4 * Derived from ivtv-audio.c
6 * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
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.
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.
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
24 #include "cx18-driver.h"
26 #include "cx18-cards.h"
27 #include "cx18-audio.h"
29 #define CX18_AUDIO_ENABLE 0xc72014
31 /* Selects the audio input and output according to the current
33 int cx18_audio_set_io(struct cx18
*cx
)
35 const struct cx18_card_audio_input
*in
;
39 /* Determine which input to use */
40 if (test_bit(CX18_F_I_RADIO_USER
, &cx
->i_flags
))
41 in
= &cx
->card
->radio_input
;
43 in
= &cx
->card
->audio_inputs
[cx
->audio_input
];
45 /* handle muxer chips */
46 v4l2_subdev_call(cx
->sd_extmux
, audio
, s_routing
,
47 (u32
) in
->muxer_input
, 0, 0);
49 err
= cx18_call_hw_err(cx
, cx
->card
->hw_audio_ctrl
,
50 audio
, s_routing
, in
->audio_input
, 0, 0);
54 /* FIXME - this internal mux should be abstracted to a subdev */
55 val
= cx18_read_reg(cx
, CX18_AUDIO_ENABLE
) & ~0x30;
56 val
|= (in
->audio_input
> CX18_AV_AUDIO_SERIAL2
) ? 0x20 :
57 (in
->audio_input
<< 4);
58 cx18_write_reg_expect(cx
, val
| 0xb00, CX18_AUDIO_ENABLE
, val
, 0x30);