C99 restricts bitfields type is signed and unsigned integer or _Bool.
See section 6.7.2.1 Structure and union specifiers.
"A bit-field shall have a type that is a qualified or unqualified version
of _Bool, signed int, unsigned int, or some other implementation-defined type."
Since the compiler packs bitfields anyways, actual data layout in the structure is unaffected.
Signed-off-by: Alex Nemirovsky <alex.nemirovsky@cortina-access.com>
Support CMD23. When CMD23 is used, CMD12 could be avoided.
Two scenarios:
1. CMD17 for single block, CMD18 + CMD12 for multiple blocks.
2. CMD23 + CMD18 for both single block and multiple blocks.
The emmc_init() should initialize whether CMD23 is supported
or not.
Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>
In a lot of embedded platforms, eMMC device is the only one storage
device. So loading content from eMMC device is required in ATF.
Create the emmc stack that could co-work with IO block driver.
Support to read/write/erase eMMC blocks on both rpmb and normal
user area. Support to change the IO speed and bus width.
Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>
Qixiang.Xu
Haojian Zhuang