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;
36 struct v4l2_routing route;
40 /* Determine which input to use */
41 if (test_bit(CX18_F_I_RADIO_USER, &cx->i_flags))
42 in = &cx->card->radio_input;
44 in = &cx->card->audio_inputs[cx->audio_input];
46 /* handle muxer chips */
47 route.input = in->muxer_input;
49 v4l2_subdev_call(cx->sd_extmux, audio, s_routing, &route);
51 route.input = in->audio_input;
52 err = cx18_call_hw_err(cx, cx->card->hw_audio_ctrl,
53 audio, s_routing, &route);
57 /* FIXME - this internal mux should be abstracted to a subdev */
58 val = cx18_read_reg(cx, CX18_AUDIO_ENABLE) & ~0x30;
59 val |= (in->audio_input > CX18_AV_AUDIO_SERIAL2) ? 0x20 :
60 (in->audio_input << 4);
61 cx18_write_reg_expect(cx, val | 0xb00, CX18_AUDIO_ENABLE, val, 0x30);