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rockchip: mkimage: rewrite padding calculation for SD/MMC and SPI images

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In (first) breaking and (then) fixing the rkspi tool, I realised that
the calculation of the required padding (for the header-size and the
2K-in-every-4K SPI layout) was not as self-explainatory as it could
have been.  This change rewrites the code (using new, common functions
in rkcommon.c) and adds verbose in-line comments to ensure that we
won't fall into the same pit in the future...

Tested on the RK3399 (with has a boot0-style payload) with SD/MMC and SPI.

Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Acked-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Philipp Tomsich
2017-04-17 17:48:01 +02:00
committed by Simon Glass
parent 798c93faf3
commit 366aad4d97
4 changed files with 66 additions and 29 deletions
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10
tools/rkcommon.h
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@ -83,8 +83,14 @@ void rkcommon_rc4_encode_spl(void *buf, unsigned int offset, unsigned int size);
* @params: Pointer to the tool params structure
* @tparams: Pointer tot the image type structure (for setting
* the header and header_size)
* @alignment: Alignment (a power of two) that the image should be
* padded to (e.g. 512 if we want to align with SD/MMC
* blocksizes or 2048 for the SPI format)
*
* @return bytes of padding required/added (does not include the header_size)
*/
void rkcommon_vrec_header(struct image_tool_params *params,
struct image_type_params *tparams);
int rkcommon_vrec_header(struct image_tool_params *params,
struct image_type_params *tparams,
unsigned int alignment);
#endif