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| author | Thomas Chou <thomas@wytron.com.tw> | 2011-01-18 11:13:56 +0800 |
|---|---|---|
| committer | Scott McNutt <smcnutt@psyent.com> | 2011-04-08 09:02:27 -0400 |
| commit | 030103d780490096c7052ecee8f2af1cb422217d (patch) | |
| tree | c7ccf843c0f4cda60f788ef97779f7462519217d /board/altera/nios2-generic | |
| parent | 4db2fa7f9446d0f2fe8db3d62184b1212fe22707 (diff) | |
| download | u-boot-imx-030103d780490096c7052ecee8f2af1cb422217d.zip u-boot-imx-030103d780490096c7052ecee8f2af1cb422217d.tar.gz u-boot-imx-030103d780490096c7052ecee8f2af1cb422217d.tar.bz2 | |
nios2: reset cfi flash before reading env
Flash might be in unknown state when u-boot is started with jtag.
And got wrong env data. So reset it in board early init.
We cannot use generic cfi flash routines, because flash_init() is
not run yet.
Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Diffstat (limited to 'board/altera/nios2-generic')
| -rw-r--r-- | board/altera/nios2-generic/nios2-generic.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/board/altera/nios2-generic/nios2-generic.c b/board/altera/nios2-generic/nios2-generic.c index 89848cf..220a4c4 100644 --- a/board/altera/nios2-generic/nios2-generic.c +++ b/board/altera/nios2-generic/nios2-generic.c @@ -24,12 +24,28 @@ #include <common.h> #include <netdev.h> +#include <mtd/cfi_flash.h> +#include <asm/io.h> void text_base_hook(void); /* nop hook for text_base.S */ +#if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR) +static void __early_flash_cmd_reset(void) +{ + /* reset flash before we read env */ + writeb(AMD_CMD_RESET, CONFIG_ENV_ADDR); + writeb(FLASH_CMD_RESET, CONFIG_ENV_ADDR); +} +void early_flash_cmd_reset(void) + __attribute__((weak,alias("__early_flash_cmd_reset"))); +#endif + int board_early_init_f(void) { text_base_hook(); +#if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR) + early_flash_cmd_reset(); +#endif return 0; } |