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Enable 4BA mode for Spansion 25FL256S

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4BA mode is entered by setting bit 7 for the extended address register.

Change-Id: I807bf55d65763a9f48a6a3377f14f4e5288a7a4c
Signed-off-by: Nico Huber <nico.h@gmx.de>
Tested-by: Michael Fuckner <michael@fuckner.net>
Reviewed-on: https://review.coreboot.org/25133
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: David Hendricks <david.hendricks@gmail.com>
This commit is contained in:
Nico Huber
2018-03-13 18:14:52 +01:00
parent 57dbd64b33
commit 86bddb5d52
4 changed files with 12 additions and 8 deletions
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14
flash.h
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@ -117,21 +117,23 @@ enum write_granularity {
#define FEATURE_QPI (1 << 9)
#define FEATURE_4BA_ENTER (1 << 10) /**< Can enter/exit 4BA mode with instructions 0xb7/0xe9 w/o WREN */
#define FEATURE_4BA_ENTER_WREN (1 << 11) /**< Can enter/exit 4BA mode with instructions 0xb7/0xe9 after WREN */
#define FEATURE_4BA_EXT_ADDR (1 << 12) /**< Regular 3-byte operations can be used by writing the most
#define FEATURE_4BA_ENTER_EAR7 (1 << 12) /**< Can enter/exit 4BA mode by setting bit7 of the ext addr reg */
#define FEATURE_4BA_EXT_ADDR (1 << 13) /**< Regular 3-byte operations can be used by writing the most
significant address byte into an extended address register. */
#define FEATURE_4BA_READ (1 << 13) /**< Native 4BA read instruction (0x13) is supported. */
#define FEATURE_4BA_FAST_READ (1 << 14) /**< Native 4BA fast read instruction (0x0c) is supported. */
#define FEATURE_4BA_WRITE (1 << 15) /**< Native 4BA byte program (0x12) is supported. */
#define FEATURE_4BA_READ (1 << 14) /**< Native 4BA read instruction (0x13) is supported. */
#define FEATURE_4BA_FAST_READ (1 << 15) /**< Native 4BA fast read instruction (0x0c) is supported. */
#define FEATURE_4BA_WRITE (1 << 16) /**< Native 4BA byte program (0x12) is supported. */
/* 4BA Shorthands */
#define FEATURE_4BA_NATIVE (FEATURE_4BA_READ | FEATURE_4BA_FAST_READ | FEATURE_4BA_WRITE)
#define FEATURE_4BA (FEATURE_4BA_ENTER | FEATURE_4BA_EXT_ADDR | FEATURE_4BA_NATIVE)
#define FEATURE_4BA_WREN (FEATURE_4BA_ENTER_WREN | FEATURE_4BA_EXT_ADDR | FEATURE_4BA_NATIVE)
#define FEATURE_4BA_EAR7 (FEATURE_4BA_ENTER_EAR7 | FEATURE_4BA_EXT_ADDR | FEATURE_4BA_NATIVE)
/*
* Most flash chips are erased to ones and programmed to zeros. However, some
* other flash chips, such as the ENE KB9012 internal flash, work the opposite way.
*/
#define FEATURE_ERASED_ZERO (1 << 16)
#define FEATURE_NO_ERASE (1 << 17)
#define FEATURE_ERASED_ZERO (1 << 17)
#define FEATURE_NO_ERASE (1 << 18)
#define ERASED_VALUE(flash) (((flash)->chip->feature_bits & FEATURE_ERASED_ZERO) ? 0x00 : 0xff)