From 50a5660c9c11c77c794783cd9a3343bc3ff07b6e Mon Sep 17 00:00:00 2001 From: Boris Baykov Date: Sat, 11 Jun 2016 18:28:59 +0200 Subject: 4BA: Basic support for 4-bytes addressing mode extensions MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit If flash chip is switched to 4-bytes addressing mode then all read/erase/program instructions will be switched from 3-bytes mode to 4-bytes mode. Then well known instructions like 03h (Read), 02h (Program) and 20h,52h,D8h (Erase) will become one byte longer and accept 4-bytes address instead of 3-bytes. This patch provides support for well known instructions in 4-bytes addressing mode. Also here is the code to enter 4-bytes addressing mode by execute the instruction B7h (Enter 4-bytes mode). Patched files ------------- chipdrivers.h + added functions declarations for spi4ba.c flash.h + feature definitions added Makefile + added spi4ba.c Added files ----------- 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 enter 4-bytes addressing mode + functions for read/write/erase in 4-bytes addressing mode Change-Id: Ie72e2a89cd75fb4d09f48e81c4c1d927c317b7a7 Signed-off-by: Boris Baykov , Russia, Jan 2014 [clg: ported from https://www.flashrom.org/pipermail/flashrom/2015-January/013199.html ] Signed-off-by: Cédric Le Goater Reviewed-on: https://review.coreboot.org/20513 Reviewed-by: David Hendricks Reviewed-by: Nico Huber Tested-by: build bot (Jenkins) --- spi4ba.h | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 spi4ba.h (limited to 'spi4ba.h') diff --git a/spi4ba.h b/spi4ba.h new file mode 100644 index 00000000..15feecb4 --- /dev/null +++ b/spi4ba.h @@ -0,0 +1,54 @@ +/* + * This file is part of the flashrom project. + * + * Copyright (C) 2014 Boris Baykov + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +*/ + +/* + * JEDEC flash chips instructions for 4-bytes addressing + * SPI chip driver functions for 4-bytes addressing + */ + +#ifndef __SPI_4BA_H__ +#define __SPI_4BA_H__ 1 + +/* Enter 4-byte Address Mode */ +#define JEDEC_ENTER_4_BYTE_ADDR_MODE 0xB7 +#define JEDEC_ENTER_4_BYTE_ADDR_MODE_OUTSIZE 0x01 +#define JEDEC_ENTER_4_BYTE_ADDR_MODE_INSIZE 0x00 + +/* Exit 4-byte Address Mode */ +#define JEDEC_EXIT_4_BYTE_ADDR_MODE 0xE9 +#define JEDEC_EXIT_4_BYTE_ADDR_MODE_OUTSIZE 0x01 +#define JEDEC_EXIT_4_BYTE_ADDR_MODE_INSIZE 0x00 + +/* enter 4-bytes addressing mode */ +int spi_enter_4ba_b7(struct flashctx *flash); +int spi_enter_4ba_b7_we(struct flashctx *flash); + +/* read/write flash bytes in 4-bytes addressing mode */ +int spi_byte_program_4ba(struct flashctx *flash, unsigned int addr, uint8_t databyte); +int spi_nbyte_program_4ba(struct flashctx *flash, unsigned int addr, const uint8_t *bytes, unsigned int len); +int spi_nbyte_read_4ba(struct flashctx *flash, unsigned int addr, uint8_t *bytes, unsigned int len); + +/* erase flash bytes in 4-bytes addressing mode */ +int spi_block_erase_20_4ba(struct flashctx *flash, unsigned int addr, unsigned int blocklen); +int spi_block_erase_52_4ba(struct flashctx *flash, unsigned int addr, unsigned int blocklen); +int spi_block_erase_d8_4ba(struct flashctx *flash, unsigned int addr, unsigned int blocklen); + + +#endif /* __SPI_4BA_H__ */ -- cgit v1.2.3