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| author | John Schmoller <jschmoller@xes-inc.com> | 2010-09-29 14:05:44 -0500 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2010-10-20 21:58:16 +0200 |
| commit | c62491d2602b353a815a909e27eec0df9f2c06a2 (patch) | |
| tree | 9a3c3c152238319c0a160b51bb901a17617d9d0e /arch | |
| parent | 7a8ddeea5ed0b80fc83b6ae57ef3e98fc69a92da (diff) | |
| download | u-boot-imx-c62491d2602b353a815a909e27eec0df9f2c06a2.zip u-boot-imx-c62491d2602b353a815a909e27eec0df9f2c06a2.tar.gz u-boot-imx-c62491d2602b353a815a909e27eec0df9f2c06a2.tar.bz2 | |
ppc: Don't initialize write protected NOR flashes
If a NOR flash is write protected it can not be initialized/detected so
add the ability for boards to skip NOR initialization on bootup. A
board can skip NOR initialization by implementing the
board_flash_wp_on() function.
Signed-off-by: John Schmoller <jschmoller@xes-inc.com>
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
CC: sr@denx.de
Acked-by: Stefan Roese <sr@denx.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/lib/board.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/arch/powerpc/lib/board.c b/arch/powerpc/lib/board.c index c0c7fd4..2e0749d 100644 --- a/arch/powerpc/lib/board.c +++ b/arch/powerpc/lib/board.c @@ -175,6 +175,16 @@ void __board_add_ram_info(int use_default) } void board_add_ram_info(int) __attribute__((weak, alias("__board_add_ram_info"))); +int __board_flash_wp_on(void) +{ + /* + * Most flashes can't be detected when write protection is enabled, + * so provide a way to let U-Boot gracefully ignore write protected + * devices. + */ + return 0; +} +int board_flash_wp_on(void) __attribute__((weak, alias("__board_flash_wp_on"))); static int init_func_ram (void) { @@ -698,7 +708,11 @@ void board_init_r (gd_t *id, ulong dest_addr) #if !defined(CONFIG_SYS_NO_FLASH) puts ("FLASH: "); - if ((flash_size = flash_init ()) > 0) { + if (board_flash_wp_on()) { + printf("Uninitialized - Write Protect On\n"); + /* Since WP is on, we can't find real size. Set to 0 */ + flash_size = 0; + } else if ((flash_size = flash_init ()) > 0) { # ifdef CONFIG_SYS_FLASH_CHECKSUM print_size (flash_size, ""); /* |