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| author | Heiko Schocher <hs@denx.de> | 2011-01-13 08:25:00 +0100 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2011-01-18 23:34:26 +0100 |
| commit | 466f0137e8661fb62cbece1ce764f8369080c6e8 (patch) | |
| tree | 4662e64737dbf3baa19f0f6f87831393607cffa8 /doc | |
| parent | 1514579fbfb4237e5ac6dfc5c67742765ea7c95c (diff) | |
| download | u-boot-imx-466f0137e8661fb62cbece1ce764f8369080c6e8.zip u-boot-imx-466f0137e8661fb62cbece1ce764f8369080c6e8.tar.gz u-boot-imx-466f0137e8661fb62cbece1ce764f8369080c6e8.tar.bz2 | |
mpc5200, digsy_mtc: add support for rev5 board version
difference to previous board version:
- M29W128GH flash from Numonyx
- SDRAM ISSI IS45S16800 (Option A2 105°C)
- rev5 uses RTC RV-3029-C2
- update cs0 and cs1 baseaddr and length
depending on the detected flash size.
- added Werner Pfister <Pfister_Werner@intercontrol.de>
as maintainer for the digsy board variants
- As the M29W128GH needs a special flash_cmd_reset()
document that in the new file doc/README.cfi.
- move "#endif /* CONFIG_CMD_IDE */" to the right place
- remove LOWBOOT config option for digsy_mtc and digsy_mtc_rev5
boards
- change doc/README.cfi as Stefan Roese suggested
Signed-off-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Stefan Roese <sr@denx.de>
Acked-by: Detlev Zundel <dzu@denx.de>
cc: Wolfgang Denk <hs@denx.de>
cc: Stefan Roese <sr@denx.de>
cc: Werner Pfister <Pfister_Werner@intercontrol.de>
cc: Detlev Zundel <dzu@denx.de>
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/README.cfi | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/doc/README.cfi b/doc/README.cfi new file mode 100644 index 0000000..d087ff0 --- /dev/null +++ b/doc/README.cfi @@ -0,0 +1,29 @@ +The common CFI driver provides this weak default implementation for +flash_cmd_reset(): + +void __flash_cmd_reset(flash_info_t *info) +{ + /* + * We do not yet know what kind of commandset to use, so we issue + * the reset command in both Intel and AMD variants, in the hope + * that AMD flash roms ignore the Intel command. + */ + flash_write_cmd(info, 0, 0, AMD_CMD_RESET); + flash_write_cmd(info, 0, 0, FLASH_CMD_RESET); +} +void flash_cmd_reset(flash_info_t *info) + __attribute__((weak,alias("__flash_cmd_reset"))); + + +Some flash chips seems to have trouble with this reset sequence. In this case +the board specific code can override this weak default version with a board +specific function. For example the digsy_mtc board equipped with the M29W128GH +from Numonyx needs this version to function properly: + +void flash_cmd_reset(flash_info_t *info) +{ + flash_write_cmd(info, 0, 0, AMD_CMD_RESET); +} + +see also: +http://www.mail-archive.com/u-boot@lists.denx.de/msg24368.html |