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2015-10-07iPod Classic: capture support for CS42L55 codecCástor Muñoz1-1/+12
There are a couple of power saving options that can be selected using defines, they configure the CODEC in a different way than OF does: MONO_MIC: jack microphone is connected to left channel, disabling right channel saves ~1 mW, there is no reason to not to do it. BYPASS_PGA: this option only applies to the line-in, OF does not bypass the PGA and configures it to 0 dB gain. At the beginning, this patch was written based on CODEC datasheet, bypassing PGA because it saves power and incrementes dinamic range ~1dB, i have used this setup for a while without problems. Finally this option was disabled at the last minute, i decided to do it after reviewing the OF and realizing that CS42L55 datasheet recommends to bypass the PGA only if the HW includes a couple of capacitors (see Typical Connection Diagram, Note 4), at this moment i don't know if Classic includes these capacitors (probably not). Anyway, i am not able to tell the difference listening to voice recodings. TODO: - Use variable PGA gain for jack microphone (it is fixed to +12 dB. as OF does). - I am not a fan of having lots of unused #define options, these could be useful for a generic driver but actually this driver is Classic oriented, i am not sure if it could be considered disirable to eliminate them in the final version. Change-Id: I3dadf2341f44d5e13f3847e6c9de4a76cd6f0918
2013-04-22Do some cleanup, adjustment and a couple fixes to recent sound changes.Michael Sevakis1-4/+0
* SOUND_x enum can be generated by audiohw_settings.h along with settings entries and sound_val2phys. * VOLUME_MIN and VOLUME_MAX are no longer necessary within sound.c. If you need them, they are for target-defined purposes. * Fix up SDL volume implementation in sdl.c. Move sim volume calculation code to pcm-sdl.c. * Min trigger tresholds were based upon VOLUME_MIN for some reason. These setting have nothing to do with playback volume. Since it is no longer present, set these at -89dB which is the minimum peak meter sensitivity setting. * Fix an oversight in wm8758.c. I forgot to add the dB->register conversion to audiohw_set_volume. Change-Id: Ie1df33f1793eee75e6793f16bc7bddd16edb7f75
2013-04-15Straighten out the mad twisted state of sound.c and related areas.Michael Sevakis1-7/+8
This is going right in since it's long overdue. If anything is goofed, drop me a line or just tweak it yourself if you know what's wrong. :-) Make HW/SW codec interface more uniform when emulating HW functionality on SWCODEC for functions such as "audiohw_set_pitch". The firmware-to- DSP plumbing is in firmware/drivers/audiohw-swcodec.c. "sound_XXX" APIs are all in sound.c with none in DSP code any longer. Reduce number of settings definitions needed by each codec by providing defaults for common ones like balance, channels and SW tone controls. Remove need for separate SIM code and tables and add virtual codec header for hosted targets. Change-Id: I3f23702bca054fc9bda40f49824ce681bb7f777b
2011-01-07Fix CS42L55 (iPod Classic) tone controlMichael Sparmann1-1/+4
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29002 a1c6a512-1295-4272-9138-f99709370657
2011-01-02New port: iPod Classic (also known as iPod 6G/6.5G/7G)Michael Sparmann1-0/+481
Major known issues: - No bootloader yet - No support for the first-generation 160GB CE-ATA hard disk drive yet - Audio playback is slow, only FLAC seems to reach realtime git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28953 a1c6a512-1295-4272-9138-f99709370657