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 | 26 | #include "cx18-cards.h" |
| 386e439f | 27 | #include "cx18-audio.h" |
| 1c1e45d1 | 28 | |
| 33b55a0a AW |
29 | #define CX18_AUDIO_ENABLE 0xc72014 |
| 30 | #define CX18_AI1_MUX_MASK 0x30 | |
| 31 | #define CX18_AI1_MUX_I2S1 0x00 | |
| 32 | #define CX18_AI1_MUX_I2S2 0x10 | |
| 33 | #define CX18_AI1_MUX_843_I2S 0x20 | |
| 81cb727d | 34 | |
| 1c1e45d1 HV |
35 | /* Selects the audio input and output according to the current |
| 36 | settings. */ | |
| 37 | int cx18_audio_set_io(struct cx18 *cx) | |
| 38 | { | |
| ff2a2001 | 39 | const struct cx18_card_audio_input *in; |
| 33b55a0a | 40 | u32 u, v; |
| 81cb727d | 41 | int err; |
| 1c1e45d1 HV |
42 | |
| 43 | /* Determine which input to use */ | |
| ff2a2001 AW |
44 | if (test_bit(CX18_F_I_RADIO_USER, &cx->i_flags)) |
| 45 | in = &cx->card->radio_input; | |
| 46 | else | |
| 47 | in = &cx->card->audio_inputs[cx->audio_input]; | |
| 1c1e45d1 HV |
48 | |
| 49 | /* handle muxer chips */ | |
| 5325b427 | 50 | v4l2_subdev_call(cx->sd_extmux, audio, s_routing, |
| 92ab9bae | 51 | (u32) in->muxer_input, 0, 0); |
| 1c1e45d1 | 52 | |
| ff2a2001 | 53 | err = cx18_call_hw_err(cx, cx->card->hw_audio_ctrl, |
| 5325b427 | 54 | audio, s_routing, in->audio_input, 0, 0); |
| 81cb727d HV |
55 | if (err) |
| 56 | return err; | |
| 57 | ||
| ff2a2001 | 58 | /* FIXME - this internal mux should be abstracted to a subdev */ |
| 33b55a0a AW |
59 | u = cx18_read_reg(cx, CX18_AUDIO_ENABLE); |
| 60 | v = u & ~CX18_AI1_MUX_MASK; | |
| 61 | switch (in->audio_input) { | |
| 62 | case CX18_AV_AUDIO_SERIAL1: | |
| 63 | v |= CX18_AI1_MUX_I2S1; | |
| 64 | break; | |
| 65 | case CX18_AV_AUDIO_SERIAL2: | |
| 66 | v |= CX18_AI1_MUX_I2S2; | |
| 67 | break; | |
| 68 | default: | |
| 69 | v |= CX18_AI1_MUX_843_I2S; | |
| 70 | break; | |
| 71 | } | |
| 72 | if (v == u) { | |
| 73 | /* force a toggle of some AI1 MUX control bits */ | |
| 74 | u &= ~CX18_AI1_MUX_MASK; | |
| 75 | switch (in->audio_input) { | |
| 76 | case CX18_AV_AUDIO_SERIAL1: | |
| 77 | u |= CX18_AI1_MUX_843_I2S; | |
| 78 | break; | |
| 79 | case CX18_AV_AUDIO_SERIAL2: | |
| 80 | u |= CX18_AI1_MUX_843_I2S; | |
| 81 | break; | |
| 82 | default: | |
| 83 | u |= CX18_AI1_MUX_I2S1; | |
| 84 | break; | |
| 85 | } | |
| 86 | cx18_write_reg_expect(cx, u | 0xb00, CX18_AUDIO_ENABLE, | |
| 87 | u, CX18_AI1_MUX_MASK); | |
| 88 | } | |
| 89 | cx18_write_reg_expect(cx, v | 0xb00, CX18_AUDIO_ENABLE, | |
| 90 | v, CX18_AI1_MUX_MASK); | |
| 81cb727d | 91 | return 0; |
| 1c1e45d1 | 92 | } |