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rockbox/firmware
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Marcin Bukat 53bc6abc97 rk27xx: fill in the NANDC BCH register definitions 
BCHCTL bit 13 and the whole of BCHST were marked unknown. Both are
needed by any driver that reads NAND through the controller's ECC
engine: a read has to be able to report an uncorrectable sector, and MLC
parts want a refresh once a sector needs enough correction.

  BCHCTL bit 13   ECC strength, clear = t=8, set = t=14 (both m=13,
                  poly 0x25af). Established by decoding both modes
                  against real media until the stored ECC bytes
                  reproduced.

  BCHST  bit 0    result valid
         bit 2    error - uncorrectable when set together with bit 0
         bits 6:3 number of corrected bit errors

Taken from the rk2705 NAND bootloader's ECC read loop:

    tst r0,#1 ; tst r0,#4     both set -> sector uncorrectable
    lsl r0,#25 ; lsr r0,#28   -> (BCHST >> 3) & 0xf, corrected bits
    cmp r0,#3                 >= 3 triggers a block refresh

The threshold agrees with MlcRefreshHook in the Samsung OF's flash.o, so
two independent firmwares say the same thing.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Change-Id: I1e356d5510827b46035f1d7d4a2cc69f4e83f43f
2026-10-01 10:28:03 +02:00
..
asm asm: ARMv7-M: replace unity-gain write_samples() asm with memcpy 2026-07-15 22:56:05 -04:00
common Add "rbfs" prefix to native filesystem functions 2026-09-17 16:22:31 -04:00
drivers rk27xx codec: mix in only the tuner's line, keep the DAC 2026-09-30 08:07:15 -04:00
export rk27xx: fill in the NANDC BCH register definitions 2026-10-01 10:28:03 +02:00
include Add "rbfs" prefix to native filesystem functions 2026-09-17 16:22:31 -04:00
kernel 3ds: Port refactor. 2026-09-01 08:39:07 -04:00
libc chore: Get rid of *all* vestigal CVS '$Id:$' tags 2026-06-01 16:01:18 -04:00
reggen stm32h743: implement timer API 2026-07-11 17:23:36 -04:00
target rk27xx: invalidate the cache with the cache controller off 2026-09-30 16:47:48 +02:00
usbstack rk27xx: keep interrupt and bulk endpoints in separate groups 2026-09-28 16:55:21 +02:00
arabjoin.c
arabjoin.h unicode: Support characters beyond the first unicode plane 2025-09-12 09:24:30 -04:00
ata_idle_notify.c chore: Get rid of *all* vestigal CVS '$Id:$' tags 2026-06-01 16:01:18 -04:00
backlight-sw-fading.c chore: Get rid of *all* vestigal CVS '$Id:$' tags 2026-06-01 16:01:18 -04:00
backlight.c chore: Get rid of *all* vestigal CVS '$Id:$' tags 2026-06-01 16:01:18 -04:00
bidi.c bidi: do not pass non-ASCII codepoints to ispunct() 2026-07-01 21:03:38 -04:00
buflib_malloc.c chore: Get rid of *all* vestigal CVS '$Id:$' tags 2026-06-01 16:01:18 -04:00
buflib_mempool.c chore: Get rid of *all* vestigal CVS '$Id:$' tags 2026-06-01 16:01:18 -04:00
chunk_alloc.c chore: Get rid of *all* vestigal CVS '$Id:$' tags 2026-06-01 16:01:18 -04:00
COPYING
core_alloc.c Fix building Warble when configured as the iPod Video 2026-08-25 08:01:09 -04:00
debug.c chore: Get rid of *all* vestigal CVS '$Id:$' tags 2026-06-01 16:01:18 -04:00
eeprom_settings.c firmware: move iriver flash helper functions into target tree 2026-09-23 13:44:45 -04:00
elf_loader.c chore: Get rid of *all* vestigal CVS '$Id:$' tags 2026-06-01 16:01:18 -04:00
enc_base.c chore: Get rid of *all* vestigal CVS '$Id:$' tags 2026-06-01 16:01:18 -04:00
events.c chore: Get rid of *all* vestigal CVS '$Id:$' tags 2026-06-01 16:01:18 -04:00
firmware.make chore: Get rid of *all* vestigal CVS '$Id:$' tags 2026-06-01 16:01:18 -04:00
font.c Add "rbfs" prefix to native filesystem functions 2026-09-17 16:22:31 -04:00
font_cache.c unicode: Support characters beyond the first unicode plane 2025-09-12 09:24:30 -04:00
general.c chore: Get rid of *all* vestigal CVS '$Id:$' tags 2026-06-01 16:01:18 -04:00
hangul.c unicode: Support characters beyond the first unicode plane 2025-09-12 09:24:30 -04:00
lc-rock.c Add "rbfs" prefix to native filesystem functions 2026-09-17 16:22:31 -04:00
linuxboot.c chore: Get rid of *all* vestigal CVS '$Id:$' tags 2026-06-01 16:01:18 -04:00
logf.c chore: Get rid of *all* vestigal CVS '$Id:$' tags 2026-06-01 16:01:18 -04:00
lru.c
panic.c chore: Get rid of *all* vestigal CVS '$Id:$' tags 2026-06-01 16:01:18 -04:00
pcm.c pcm_sink: allow per-sink swvol/hwvol selection 2026-08-14 22:39:13 +09:00
pcm_mixer.c pcm_mixer: fix active_channels handling in mixer_handle_sampr_change 2026-07-23 21:17:13 -04:00
pcm_sampr.c chore: Get rid of *all* vestigal CVS '$Id:$' tags 2026-06-01 16:01:18 -04:00
pcm_sw_volume.c swvol: Switch to using WANT_SWVOL_32 in pcm_sw_volume.c 2026-08-14 22:45:14 -04:00
powermgmt.c chore: Get rid of *all* vestigal CVS '$Id:$' tags 2026-06-01 16:01:18 -04:00
profile.c chore: Get rid of *all* vestigal CVS '$Id:$' tags 2026-06-01 16:01:18 -04:00
README
rolo.c ROLO: Get rid of redundant call to audio_hard_stop() 2026-09-23 16:52:01 -04:00
rom.lds h300: add support for ROM image generation 2020-10-26 01:37:42 +00:00
screendump.c chore: Get rid of *all* vestigal CVS '$Id:$' tags 2026-06-01 16:01:18 -04:00
scroll_engine.c chore: Get rid of *all* vestigal CVS '$Id:$' tags 2026-06-01 16:01:18 -04:00
sdmmc.c chore: Get rid of *all* vestigal CVS '$Id:$' tags 2026-06-01 16:01:18 -04:00
sound.c audiohw: remove unused BALANCE_CAP and CLIPPING_CAP 2026-07-20 12:47:12 -04:00
SOURCES YP-CP3: Si4703 FM radio 2026-09-29 09:47:51 +02:00
storage.c chore: Get rid of *all* vestigal CVS '$Id:$' tags 2026-06-01 16:01:18 -04:00
system.c firmware: move iriver flash helper functions into target tree 2026-09-23 13:44:45 -04:00
timer.c chore: Get rid of *all* vestigal CVS '$Id:$' tags 2026-06-01 16:01:18 -04:00
tuner.c chore: Get rid of *all* vestigal CVS '$Id:$' tags 2026-06-01 16:01:18 -04:00
usb.c FS#14011: Handle usb hosts whose first request is SET_ADDRESS (Anthony Fletcher) 2026-09-27 19:36:21 -04:00

README 

See docs/README