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fb032398d2
Add a function that allows reading of the status register from the SPI chip. This can be used to determine whether write protection is enabled on the chip. BUG=chrome-os-partner:35209 BRANCH=haswell TEST=build and boot on peppy Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/240702 Reviewed-by: Shawn N <shawnn@chromium.org> (cherry picked from commit c58f17689162b291a7cdb57649a237de21b73545) Change-Id: Ib7fead2cc4ea4339ece322dd18403362c9c79c7d Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: 9fbdf0d72892eef4a742a418a347ecf650c01ea5 Original-Change-Id: I2541b22c51e43f7b7542ee0f48618cf411976a98 Original-Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/241128 Original-Reviewed-by: Shawn N <shawnn@chromium.org> Reviewed-on: http://review.coreboot.org/9730 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
/*
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* Interface to SPI flash
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*
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* Copyright (C) 2008 Atmel Corporation
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#ifndef _SPI_FLASH_H_
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#define _SPI_FLASH_H_
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#include <stdint.h>
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#include <stddef.h>
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#include <console/console.h>
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#include <spi-generic.h>
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#include <boot/coreboot_tables.h>
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struct spi_flash {
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struct spi_slave *spi;
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const char *name;
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u32 size;
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u32 sector_size;
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u8 erase_cmd;
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u8 status_cmd;
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int (*read)(struct spi_flash *flash, u32 offset,
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size_t len, void *buf);
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int (*write)(struct spi_flash *flash, u32 offset,
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size_t len, const void *buf);
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int (*erase)(struct spi_flash *flash, u32 offset,
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size_t len);
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int (*status)(struct spi_flash *flash, u8 *reg);
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};
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struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs);
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void lb_spi_flash(struct lb_header *header);
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#endif /* _SPI_FLASH_H_ */
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