| Hans Verkuil | 1a0adaf | 2007-04-27 12:31:25 -0300 | [diff] [blame] | 1 | /* |
| 2 | Audio-related ivtv functions. |
| 3 | Copyright (C) 2003-2004 Kevin Thayer <nufan_wfk at yahoo.com> |
| 4 | Copyright (C) 2005-2007 Hans Verkuil <hverkuil@xs4all.nl> |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | |
| 21 | #include "ivtv-driver.h" |
| 22 | #include "ivtv-mailbox.h" |
| 23 | #include "ivtv-i2c.h" |
| 24 | #include "ivtv-gpio.h" |
| 25 | #include "ivtv-cards.h" |
| 26 | #include "ivtv-audio.h" |
| 27 | #include <media/msp3400.h> |
| 28 | #include <linux/videodev.h> |
| 29 | |
| 30 | /* Selects the audio input and output according to the current |
| 31 | settings. */ |
| 32 | int ivtv_audio_set_io(struct ivtv *itv) |
| 33 | { |
| 34 | struct v4l2_routing route; |
| 35 | u32 audio_input; |
| 36 | int mux_input; |
| 37 | |
| 38 | /* Determine which input to use */ |
| 39 | if (test_bit(IVTV_F_I_RADIO_USER, &itv->i_flags)) { |
| 40 | audio_input = itv->card->radio_input.audio_input; |
| 41 | mux_input = itv->card->radio_input.muxer_input; |
| 42 | } else { |
| 43 | audio_input = itv->card->audio_inputs[itv->audio_input].audio_input; |
| 44 | mux_input = itv->card->audio_inputs[itv->audio_input].muxer_input; |
| 45 | } |
| 46 | |
| 47 | /* handle muxer chips */ |
| 48 | route.input = mux_input; |
| 49 | route.output = 0; |
| 50 | ivtv_i2c_hw(itv, itv->card->hw_muxer, VIDIOC_INT_S_AUDIO_ROUTING, &route); |
| 51 | |
| 52 | route.input = audio_input; |
| 53 | if (itv->card->hw_audio & IVTV_HW_MSP34XX) { |
| 54 | route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1); |
| 55 | } |
| 56 | return ivtv_i2c_hw(itv, itv->card->hw_audio, VIDIOC_INT_S_AUDIO_ROUTING, &route); |
| 57 | } |
| 58 | |
| 59 | void ivtv_audio_set_route(struct ivtv *itv, struct v4l2_routing *route) |
| 60 | { |
| 61 | ivtv_i2c_hw(itv, itv->card->hw_audio, VIDIOC_INT_S_AUDIO_ROUTING, route); |
| 62 | } |
| 63 | |
| 64 | void ivtv_audio_set_audio_clock_freq(struct ivtv *itv, u8 freq) |
| 65 | { |
| 66 | static u32 freqs[3] = { 44100, 48000, 32000 }; |
| 67 | |
| 68 | /* The audio clock of the digitizer must match the codec sample |
| 69 | rate otherwise you get some very strange effects. */ |
| 70 | if (freq > 2) |
| 71 | return; |
| 72 | ivtv_call_i2c_clients(itv, VIDIOC_INT_AUDIO_CLOCK_FREQ, &freqs[freq]); |
| 73 | } |
| 74 | |