4BA: Support for new direct-4BA instructions + W25Q256.V update

Large flash chips usually support special instructions to work with
4-bytes address directly from 3-bytes addressing mode and without
do switching to 4-bytes mode. There are 13h (4BA Read), 12h (4BA Program)
and 21h,5Ch,DCh (4BA Erase), correspondingly. However not all these
instructions are supported by all large flash chips. Some chips
support 13h only, some 13h,12h,21h and DCh, but not 5Ch. This depends
on the manufacturer of the chip.

This patch provides code to use direct 4-bytes addressing instructions.

This code should work but it tested partially only. My W25Q256FV has
support for 4BA_Read (13h), but doesn't have support 4BA_Program (12h)
and 4BA_Erase instructions. So, direct 4BA program and erase
should be tested after.

Patched files
-------------
chipdrivers.h
+ added functions declarations for spi4ba.c

flash.h
+ feature definitions added

flashchips.c
+ modified definition of Winbond W25Q256BV/W25Q256FV chips

flashrom.c
+ modified switch to 4-bytes addressing for direct-4BA instructions

spi4ba.h
+ definitions for 4-bytes addressing JEDEC commands
+ functions declarations from spi4ba.c (same as in chipdrivers.h, just to see)

spi4ba.c
+ functions for read/write/erase directly with 4-bytes address (from any mode)

Change-Id: Ib51bcc5de7826b30ad697fcbb9a5152bde2c2ac9
Signed-off-by: Boris Baykov <dev@borisbaykov.com>, Russia, Jan 2014
[clg: ported from
      https://www.flashrom.org/pipermail/flashrom/2015-January/013198.html ]
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-on: https://review.coreboot.org/20508
Reviewed-by: David Hendricks <david.hendricks@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 40 insertions, 0 deletions

diff --git a/spi4ba.h b/spi4ba.h
index f2e7bc54..8e500d15 100644
--- a/spi4ba.h
+++ b/spi4ba.h
@@ -46,6 +46,36 @@
 #define JEDEC_READ_EXT_ADDR_REG_OUTSIZE		0x01
 #define JEDEC_READ_EXT_ADDR_REG_INSIZE		0x01
 
+/* Read the memory with 4-byte address
+   From ANY mode (3-bytes or 4-bytes) it works with 4-byte address */
+#define JEDEC_READ_4BA		0x13
+#define JEDEC_READ_4BA_OUTSIZE	0x05
+/*      JEDEC_READ_4BA_INSIZE : any length */
+
+/* Write memory byte with 4-byte address
+   From ANY mode (3-bytes or 4-bytes) it works with 4-byte address */
+#define JEDEC_BYTE_PROGRAM_4BA		0x12
+#define JEDEC_BYTE_PROGRAM_4BA_OUTSIZE	0x06
+#define JEDEC_BYTE_PROGRAM_4BA_INSIZE	0x00
+
+/* Sector Erase 0x21 (with 4-byte address), usually 4k size.
+   From ANY mode (3-bytes or 4-bytes) it works with 4-byte address */
+#define JEDEC_SE_4BA		0x21
+#define JEDEC_SE_4BA_OUTSIZE	0x05
+#define JEDEC_SE_4BA_INSIZE	0x00
+
+/* Block Erase 0x5C (with 4-byte address), usually 32k size.
+   From ANY mode (3-bytes or 4-bytes) it works with 4-byte address */
+#define JEDEC_BE_5C_4BA		0x5C
+#define JEDEC_BE_5C_4BA_OUTSIZE	0x05
+#define JEDEC_BE_5C_4BA_INSIZE	0x00
+
+/* Block Erase 0xDC (with 4-byte address), usually 64k size.
+   From ANY mode (3-bytes or 4-bytes) it works with 4-byte address */
+#define JEDEC_BE_DC_4BA		0xdc
+#define JEDEC_BE_DC_4BA_OUTSIZE	0x05
+#define JEDEC_BE_DC_4BA_INSIZE	0x00
+
 /* enter 4-bytes addressing mode */
 int spi_enter_4ba_b7(struct flashctx *flash);
 int spi_enter_4ba_b7_we(struct flashctx *flash);
@@ -70,5 +100,15 @@ int spi_block_erase_20_4ba_ereg(struct flashctx *flash, unsigned int addr, unsig
 int spi_block_erase_52_4ba_ereg(struct flashctx *flash, unsigned int addr, unsigned int blocklen);
 int spi_block_erase_d8_4ba_ereg(struct flashctx *flash, unsigned int addr, unsigned int blocklen);
 
+/* read/write flash bytes with 4-bytes address from any mode (3-byte or 4-byte) */
+int spi_byte_program_4ba_direct(struct flashctx *flash, unsigned int addr, uint8_t databyte);
+int spi_nbyte_program_4ba_direct(struct flashctx *flash, unsigned int addr, const uint8_t *bytes, unsigned int len);
+int spi_nbyte_read_4ba_direct(struct flashctx *flash, unsigned int addr, uint8_t *bytes, unsigned int len);
+
+/* erase flash bytes with 4-bytes address from any mode (3-byte or 4-byte) */
+int spi_block_erase_21_4ba_direct(struct flashctx *flash, unsigned int addr, unsigned int blocklen);
+int spi_block_erase_5c_4ba_direct(struct flashctx *flash, unsigned int addr, unsigned int blocklen);
+int spi_block_erase_dc_4ba_direct(struct flashctx *flash, unsigned int addr, unsigned int blocklen);
+
 
 #endif /* __SPI_4BA_H__ */