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spi25: Enable native 4BA read and write using feature bits

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Prefer the native 4BA instruction when they are supported. In this
case, override our logic to decide to use a 4BA address.

Change-Id: I2f6817ca198bf923671a7aa67e956e5477d71848
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/22385
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Nico Huber
2017-10-14 18:00:20 +02:00
parent f43c654ad0
commit a1672f8293
3 changed files with 28 additions and 21 deletions
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2
flash.h
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@ -122,6 +122,8 @@ enum write_granularity {
#define FEATURE_4BA_SUPPORT (1 << 10)
#define FEATURE_4BA_EXT_ADDR (1 << 11) /**< Regular 3-byte operations can be used by writing the most
significant address byte into an extended address register. */
#define FEATURE_4BA_READ (1 << 12) /**< Native 4BA read instruction (0x13) is supported. */
#define FEATURE_4BA_WRITE (1 << 13) /**< Native 4BA byte program (0x12) is supported. */
enum test_state {
OK = 0,