From 291b2338c98c211794d55a68c9585d278fc86563 Mon Sep 17 00:00:00 2001 From: Cástor Muñoz Date: Sat, 6 Dec 2014 19:00:34 +0100 Subject: ipod Classic: implement HAVE_RECORDING This patch has been tested on iPod 80 and 160slim, actually it works but some updates must be done to the final version: - unlimitted input buffer - decrease CHUNK_SIZE - use non-cached addresses instead of discard d-cache ??? Capture hardware versions: Ver iPod models capture support --- ----------- --------------- 0 80/160fat dock line-in 1 120/160slim dock line-in + jack mic HW version 1 includes an amplifier for the jack plug mic. Capture HW detection only tested on iPod 80 and 160slim. CODEC power: AFAIK, OF powers CS42L55 at VA=2.4V for capture (1.8V for playback) and turns on the ADC charge pump. CODEC datasheet recommmends to disable the charge pump for VA>2.1V. CS42L55 DS, s4.13 (Required Initialization Settings): for VA>2.1V, some adjustments "must" be done using undocummented "control port compensation" registers. OF does not modifies these registers when VA=2.4V. This patch configures capture HW in the same way as OF does. TODO: - ADC full scale voltage depends on VA, perform tests to find clipping levels for VA=1.8V and VA=2.4V Change-Id: I7e20fd3ecaa83b1c58d5c746f5153fe5c3891d75 --- firmware/target/arm/s5l8702/ipod6g/audio-ipod6g.c | 32 +++++++++++++++++++++++ 1 file changed, 32 insertions(+) (limited to 'firmware/target/arm/s5l8702/ipod6g') diff --git a/firmware/target/arm/s5l8702/ipod6g/audio-ipod6g.c b/firmware/target/arm/s5l8702/ipod6g/audio-ipod6g.c index 6ede3d0c30..6a3bab06d6 100644 --- a/firmware/target/arm/s5l8702/ipod6g/audio-ipod6g.c +++ b/firmware/target/arm/s5l8702/ipod6g/audio-ipod6g.c @@ -22,6 +22,9 @@ #include "cpu.h" #include "audio.h" #include "sound.h" +#include "pmu-target.h" + +extern int rec_hw_ver; #if INPUT_SRC_CAPS != 0 void audio_set_output_source(int source) @@ -46,13 +49,42 @@ void audio_input_mux(int source, unsigned flags) { audiohw_set_monitor(false); audiohw_disable_recording(); + + /* Vcodec = 1800mV (900mV + value*100mV) */ + pmu_ldo_set_voltage(3, 0x9); + + if (rec_hw_ver == 1) + GPIOCMD = 0xe070e; } #endif break; + +#ifdef HAVE_MIC_REC + case AUDIO_SRC_MIC: /* recording only */ + if (source != last_source) + { + if (rec_hw_ver == 1) + GPIOCMD = 0xe070f; + + /* Vcodec = 2400mV (900mV + value*100mV) */ + pmu_ldo_set_voltage(3, 0xf); + + audiohw_set_monitor(false); + audiohw_enable_recording(true); /* source mic */ + } + break; +#endif + #ifdef HAVE_LINE_REC case AUDIO_SRC_LINEIN: /* recording only */ if (source != last_source) { + if (rec_hw_ver == 1) + GPIOCMD = 0xe070e; + + /* Vcodec = 2400mV (900mV + value*100mV) */ + pmu_ldo_set_voltage(3, 0xf); + audiohw_set_monitor(false); audiohw_enable_recording(false); /* source line */ } -- cgit v1.2.3