projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1c1e45d1 HV |
1 | /* |
| 2 | * cx18 audio-related functions | |
| 3 | * | |
| 4 | * Derived from ivtv-audio.c | |
| 5 | * | |
| 6 | * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl> | |
| 7 | * | |
| 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. | |
| 12 | * | |
| 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. | |
| 17 | * | |
| 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 | |
| 21 | * 02111-1307 USA | |
| 22 | */ | |
| 23 | ||
| 24 | #include "cx18-driver.h" | |
| b1526421 | 25 | #include "cx18-io.h" |
| 1c1e45d1 HV |
26 | #include "cx18-i2c.h" |
| 27 | #include "cx18-cards.h" | |
| 28 | #include "cx18-audio.h" | |
| 29 | ||
| 81cb727d HV |
30 | #define CX18_AUDIO_ENABLE 0xc72014 |
| 31 | ||
| 1c1e45d1 HV |
32 | /* Selects the audio input and output according to the current |
| 33 | settings. */ | |
| 34 | int cx18_audio_set_io(struct cx18 *cx) | |
| 35 | { | |
| 36 | struct v4l2_routing route; | |
| 37 | u32 audio_input; | |
| 81cb727d | 38 | u32 val; |
| 1c1e45d1 | 39 | int mux_input; |
| 81cb727d | 40 | int err; |
| 1c1e45d1 HV |
41 | |
| 42 | /* Determine which input to use */ | |
| 43 | if (test_bit(CX18_F_I_RADIO_USER, &cx->i_flags)) { | |
| 44 | audio_input = cx->card->radio_input.audio_input; | |
| 45 | mux_input = cx->card->radio_input.muxer_input; | |
| 46 | } else { | |
| 47 | audio_input = | |
| 48 | cx->card->audio_inputs[cx->audio_input].audio_input; | |
| 49 | mux_input = | |
| 50 | cx->card->audio_inputs[cx->audio_input].muxer_input; | |
| 51 | } | |
| 52 | ||
| 53 | /* handle muxer chips */ | |
| 54 | route.input = mux_input; | |
| 55 | route.output = 0; | |
| 56 | cx18_i2c_hw(cx, cx->card->hw_muxer, VIDIOC_INT_S_AUDIO_ROUTING, &route); | |
| 57 | ||
| 58 | route.input = audio_input; | |
| 81cb727d | 59 | err = cx18_i2c_hw(cx, cx->card->hw_audio_ctrl, |
| 1c1e45d1 | 60 | VIDIOC_INT_S_AUDIO_ROUTING, &route); |
| 81cb727d HV |
61 | if (err) |
| 62 | return err; | |
| 63 | ||
| b1526421 | 64 | val = cx18_read_reg(cx, CX18_AUDIO_ENABLE) & ~0x30; |
| 81cb727d HV |
65 | val |= (audio_input > CX18_AV_AUDIO_SERIAL2) ? 0x20 : |
| 66 | (audio_input << 4); | |
| b1526421 | 67 | cx18_write_reg(cx, val | 0xb00, CX18_AUDIO_ENABLE); |
| 81cb727d HV |
68 | cx18_vapi(cx, CX18_APU_RESETAI, 1, 0); |
| 69 | return 0; | |
| 1c1e45d1 HV |
70 | } |
| 71 | ||
| 72 | void cx18_audio_set_route(struct cx18 *cx, struct v4l2_routing *route) | |
| 73 | { | |
| 74 | cx18_i2c_hw(cx, cx->card->hw_audio_ctrl, | |
| 75 | VIDIOC_INT_S_AUDIO_ROUTING, route); | |
| 76 | } | |
| 77 | ||
| 78 | void cx18_audio_set_audio_clock_freq(struct cx18 *cx, u8 freq) | |
| 79 | { | |
| 80 | static u32 freqs[3] = { 44100, 48000, 32000 }; | |
| 81 | ||
| 82 | /* The audio clock of the digitizer must match the codec sample | |
| 83 | rate otherwise you get some very strange effects. */ | |
| 84 | if (freq > 2) | |
| 85 | return; | |
| 86 | cx18_call_i2c_clients(cx, VIDIOC_INT_AUDIO_CLOCK_FREQ, &freqs[freq]); | |
| 87 | } |