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Cástor Muñoz 42abc6a496 iPod Classic: capture support for CS42L55 codec 
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
2015-10-07 06:15:03 +02:00
..
asm Fix YUV generic C performance function on 24-bit framebuffer 2014-11-10 20:30:16 +01:00
common Fix warning in firmware/common/structec.c 2015-02-24 16:27:16 -05:00
decompressor Add KEEP() around vectors in linker scripts. 2011-12-18 06:43:08 +00:00
drivers iPod Classic: capture support for CS42L55 codec 2015-10-07 06:15:03 +02:00
export iPod Classic: capture support for CS42L55 codec 2015-10-07 06:15:03 +02:00
include Improve core_alloc() / buflib_alloc() documentation 2015-01-02 18:51:15 +01:00
kernel Remove I/O priority. It is harmful when used with the new file code. 2014-08-30 14:01:21 -04:00
libc mktime(): Remove redundant assignment of 'result' 2015-01-04 17:37:35 +01:00
target iPod Classic: use new PL080 DMA driver 2015-10-07 06:15:03 +02:00
test Limit more variables to file scope 2015-01-11 21:40:51 +01:00
usbstack Revert "usb_storage: make it a bit more correct" 2015-02-16 14:06:28 +01:00
arabjoin.c
arabjoin.h
ata_idle_notify.c Fix reds. 2014-03-14 23:43:45 +01:00
backlight-sw-fading.c Get rid of stupid _backlight_* function names 2015-01-12 11:09:27 +01:00
backlight.c iBasso DX50/DX90: Major code cleanup and reorganization. 2015-02-02 21:57:55 +01:00
bidi.c bidi.c: Check buffer sizes. 2014-01-09 23:30:32 +01:00
buflib.c buflib: Switch from term "cookie" to "metadata" 2015-01-02 19:26:03 +01:00
COPYING
core_alloc.c Make a few local variables static 2015-01-11 18:02:43 +01:00
debug.c Redirect (L)DEBUGFs to adb logcat in DEBUG enabled builds. 2010-09-20 17:38:47 +00:00
eeprom_settings.c
enc_base.c FS#12378 : Remove various unused code, and comment out some unused code and data for reference or future use. 2011-12-14 21:45:25 +00:00
events.c Make thirty functions static to reduce binary size 2015-01-05 18:44:36 +01:00
firmware.make Prevent spurious recompiles on account of changed version. 2014-08-28 15:48:56 +02:00
font.c fonts: Fix regression(s) caused by c23ce62. 2014-01-26 14:01:48 +01:00
font_cache.c fonts: Do not unload completely on USB. 2014-01-15 23:37:39 +01:00
general.c kernel: Break out kernel primitives into separate files and move to separate dir. 2014-03-03 18:11:57 +01:00
hangul.c
ifp_usb_serial.c Make thirty functions static to reduce binary size 2015-01-05 18:44:36 +01:00
load_code.c Fix various reds. Some includes needed fixup. 2014-03-03 19:10:48 +01:00
logf.c Make a few local variables static 2015-01-11 18:02:43 +01:00
lru.c Revert r30818 2011-10-22 08:02:38 +00:00
panic.c panicf doesn't return so why not tell GCC and $AVE : 2014-08-25 13:55:16 -04:00
pcm.c Greatly reduce volume-change zipper artifacts with SW volume. 2014-03-08 08:04:41 +01:00
pcm_mixer.c Enable setting of global output samplerate on certain targets. 2013-07-06 04:22:04 +02:00
pcm_sampr.c
pcm_sw_volume.c Greatly reduce volume-change zipper artifacts with SW volume. 2014-03-08 08:04:41 +01:00
powermgmt.c iBasso DX50/DX90: Major code cleanup and reorganization. 2015-02-02 21:57:55 +01:00
profile.c Remove last traces of sprintf.h 2010-05-07 02:13:47 +00:00
README
rolo.c Fix reds. Also apply the new scrolling to lcd charcell (this even uncovered an 2013-12-15 00:38:48 +01:00
rom.lds rombox: Do not copy .init section to ram on startup. 2014-01-20 10:42:02 +01:00
screendump.c Fix warnings in firmware/screendump.c 2015-02-24 16:55:26 -05:00
scroll_engine.c scroll_engine: Fix FS#12894: Text scrolling stops working after a few seconds/minutes 2014-01-12 21:29:55 +01:00
sdmmc.c Various minor cleanups 2010-08-01 10:07:05 +00:00
sound.c Add DAC's oversampling filter roll-off selection to sound settings. 2013-05-24 11:18:16 +04:00
SOURCES iPod Classic: use new PL080 DMA driver 2015-10-07 06:15:03 +02:00
storage.c Remove I/O priority. It is harmful when used with the new file code. 2014-08-30 14:01:21 -04:00
system.c Fix reds. 2011-12-24 12:21:16 +00:00
timer.c
tuner.c Add stub STFM1000 tuner driver 2012-05-19 16:10:52 +02:00
usb.c usb: finally get rid of USE_ROCKBOX_USB in Sansa bootloader, use bootloader usb 2015-01-08 22:30:22 +01:00

README 

See docs/README