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/* Copyright 2013-2014 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __LIBFLASH_H
#define __LIBFLASH_H
#include <stdint.h>
#include <stdbool.h>
#include <libflash/blocklevel.h>
/* API status/return:
*
* <0 = flash controller errors passed through,
* 0 = success
* >0 = libflash error
*/
#include <libflash/errors.h>
#ifdef __SKIBOOT__
#include <skiboot.h>
#define FL_INF(fmt...) do { prlog(PR_INFO, fmt); } while(0)
#define FL_DBG(fmt...) do { prlog(PR_DEBUG, fmt); } while(0)
#define FL_ERR(fmt...) do { prlog(PR_ERR, fmt); } while(0)
#else
#include <stdio.h>
extern bool libflash_debug;
#define FL_DBG(fmt...) do { if (libflash_debug) printf(fmt); } while(0)
#define FL_INF(fmt...) do { printf(fmt); } while(0)
#define FL_ERR(fmt...) do { printf(fmt); } while(0)
#endif
/* Flash chip, opaque */
struct flash_chip;
struct spi_flash_ctrl;
int flash_init(struct spi_flash_ctrl *ctrl, struct blocklevel_device **bl,
struct flash_chip **flash_chip);
void flash_exit(struct blocklevel_device *bl);
/*
* Function which till call close on the underlying struct spi_flash_ctrl
*/
void flash_exit_close(struct blocklevel_device *bl, void (*close)(struct spi_flash_ctrl *ctrl));
/* libflash sets the 4b mode automatically based on the flash
* size and controller capabilities but it can be overriden
*/
int flash_force_4b_mode(struct flash_chip *c, bool enable_4b);
/*
* This provides a wapper around flash_read() on ECCed data. All params are
* the same as to flash_read(). Not passing true in ecc is akin to calling
* flash_read() directly.
*
* len is length of data without ecc attached therefore this will read beyond
* pos + len.
*/
int flash_read_corrected(struct blocklevel_device *bl, uint32_t pos, void *buf,
uint32_t len, bool ecc);
/*
* This provides a wrapper around flash_write() on ECCed data. All params are
* the same as to flash_write(). Not passing true in ecc is akin to calling
* flash_write() directly.
*
* size is length of data without ECC attached therefore this will write beyond
* dst + size.
*/
int flash_write_corrected(struct blocklevel_device *bl, uint32_t dst, const void *src,
uint32_t size, bool verify, bool ecc);
/*
* This provides a wrapper around flash_smart_write() on ECCed data. All
* params are the same as to flash_smart_write(). Not passing true in ecc is
* akin to calling flash_smart_write() directly.
*
* size is length of data without ECC attached therefore this will write beyond
* dst + size.
*/
int flash_smart_write_corrected(struct blocklevel_device *bl, uint32_t dst, const void *src,
uint32_t size, bool ecc);
/* chip erase may not be supported by all chips/controllers, get ready
* for FLASH_ERR_CHIP_ER_NOT_SUPPORTED
*/
int flash_erase_chip(struct flash_chip *c);
#endif /* __LIBFLASH_H */
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