projects / mirror_ubuntu-artful-kernel.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. | |
| 1c1e45d1 HV |
17 | */ |
| 18 | ||
| 19 | #include "cx18-driver.h" | |
| b1526421 | 20 | #include "cx18-io.h" |
| 1c1e45d1 | 21 | #include "cx18-cards.h" |
| 386e439f | 22 | #include "cx18-audio.h" |
| 1c1e45d1 | 23 | |
| 33b55a0a AW |
24 | #define CX18_AUDIO_ENABLE 0xc72014 |
| 25 | #define CX18_AI1_MUX_MASK 0x30 | |
| 26 | #define CX18_AI1_MUX_I2S1 0x00 | |
| 27 | #define CX18_AI1_MUX_I2S2 0x10 | |
| 28 | #define CX18_AI1_MUX_843_I2S 0x20 | |
| 81cb727d | 29 | |
| 1c1e45d1 HV |
30 | /* Selects the audio input and output according to the current |
| 31 | settings. */ | |
| 32 | int cx18_audio_set_io(struct cx18 *cx) | |
| 33 | { | |
| ff2a2001 | 34 | const struct cx18_card_audio_input *in; |
| 33b55a0a | 35 | u32 u, v; |
| 81cb727d | 36 | int err; |
| 1c1e45d1 HV |
37 | |
| 38 | /* Determine which input to use */ | |
| ff2a2001 AW |
39 | if (test_bit(CX18_F_I_RADIO_USER, &cx->i_flags)) |
| 40 | in = &cx->card->radio_input; | |
| 41 | else | |
| 42 | in = &cx->card->audio_inputs[cx->audio_input]; | |
| 1c1e45d1 HV |
43 | |
| 44 | /* handle muxer chips */ | |
| 5325b427 | 45 | v4l2_subdev_call(cx->sd_extmux, audio, s_routing, |
| 92ab9bae | 46 | (u32) in->muxer_input, 0, 0); |
| 1c1e45d1 | 47 | |
| ff2a2001 | 48 | err = cx18_call_hw_err(cx, cx->card->hw_audio_ctrl, |
| 5325b427 | 49 | audio, s_routing, in->audio_input, 0, 0); |
| 81cb727d HV |
50 | if (err) |
| 51 | return err; | |
| 52 | ||
| ff2a2001 | 53 | /* FIXME - this internal mux should be abstracted to a subdev */ |
| 33b55a0a AW |
54 | u = cx18_read_reg(cx, CX18_AUDIO_ENABLE); |
| 55 | v = u & ~CX18_AI1_MUX_MASK; | |
| 56 | switch (in->audio_input) { | |
| 57 | case CX18_AV_AUDIO_SERIAL1: | |
| 58 | v |= CX18_AI1_MUX_I2S1; | |
| 59 | break; | |
| 60 | case CX18_AV_AUDIO_SERIAL2: | |
| 61 | v |= CX18_AI1_MUX_I2S2; | |
| 62 | break; | |
| 63 | default: | |
| 64 | v |= CX18_AI1_MUX_843_I2S; | |
| 65 | break; | |
| 66 | } | |
| 67 | if (v == u) { | |
| 68 | /* force a toggle of some AI1 MUX control bits */ | |
| 69 | u &= ~CX18_AI1_MUX_MASK; | |
| 70 | switch (in->audio_input) { | |
| 71 | case CX18_AV_AUDIO_SERIAL1: | |
| 72 | u |= CX18_AI1_MUX_843_I2S; | |
| 73 | break; | |
| 74 | case CX18_AV_AUDIO_SERIAL2: | |
| 75 | u |= CX18_AI1_MUX_843_I2S; | |
| 76 | break; | |
| 77 | default: | |
| 78 | u |= CX18_AI1_MUX_I2S1; | |
| 79 | break; | |
| 80 | } | |
| 81 | cx18_write_reg_expect(cx, u | 0xb00, CX18_AUDIO_ENABLE, | |
| 82 | u, CX18_AI1_MUX_MASK); | |
| 83 | } | |
| 84 | cx18_write_reg_expect(cx, v | 0xb00, CX18_AUDIO_ENABLE, | |
| 85 | v, CX18_AI1_MUX_MASK); | |
| 81cb727d | 86 | return 0; |
| 1c1e45d1 | 87 | } |