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| author | Vadim Bendebury <vbendeb@chromium.org> | 2011-09-13 22:41:24 -0700 |
|---|---|---|
| committer | Vadim Bendebury <vbendeb@chromium.org> | 2011-09-15 11:00:47 -0700 |
| commit | 7ca2ded36434d388b872e548726f590c69c25c92 (patch) | |
| tree | 3e1ca62f9e37b868bc412e7a6d3fbc3155486a9d /include | |
| parent | f23e5f319d6bcdd869571ddd96e01ec780806648 (diff) | |
Report SPI driver write errors.
The ICH SPI controller can't handle more than 64 bytes in one
write transaction, but the SPI chips' drivers routinely invoke
controller transfer function (spi_xfer()) trying to write a full
SPI chip page, which often exceeds the ICH SPI controller capacity.
This condition goes unnoticed, resulting in only the first 64
bytes of the data written into the flash, the rest gets dropped
on the floor.
With this change an error value will be returned to the caller
and an error message will be printed on the screen.
Also, it turned out that the chip level flash drivers interpret
as errors only the negative values returned by the SPI interface
driver. But the SPI interface driver in ich.c was returning +1 to
report errors. This CL takes care of this discrepancy too.
BUG=chromium-os:20105
TEST=manual
. modify the '#ifdef CONFIG_ICH_SPI' line to read
'#ifdef CONFIG_ICH_SPIxx' in include/spi_flash.h
. build x86-alex bootloader image
. program the image on an alex device
. restart the device
. at the 'boot>' prompt run the 'saveenv' command
Observe the command failed and the error message printed on the console.
. restore include/spi_flash.h
. build x86-alex bootloader image
. program the image on an alex device
. restart the device
. at the 'boot>' prompt run the following commands:
setenv xyz 'this is a string'
saveenv
. reboot the device
. at the 'boot>' prompt run 'printenv'
Observe the environment include the new variable (xyz)
Change-Id: I528a85b208213c10fdf8cf3e908caf7bea94bc62
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: http://gerrit.chromium.org/gerrit/7697
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: David Hendricks <dhendrix@chromium.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/spi_flash.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/spi_flash.h b/include/spi_flash.h index 525a3497cd4..f8b177a4e37 100644 --- a/include/spi_flash.h +++ b/include/spi_flash.h @@ -33,7 +33,8 @@ #ifdef CONFIG_ICH_SPI #define CONTROLLER_PAGE_LIMIT 64 #else -#define CONTROLLER_PAGE_LIMIT MAX_INT +/* any number larger than 4K would do, actually */ +#define CONTROLLER_PAGE_LIMIT ((int)(~0U>>1)) #endif struct spi_flash { |