178 lines
4.9 KiB
C
178 lines
4.9 KiB
C
/**
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* \file
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* <!--
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* This file is part of BeRTOS.
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*
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* Bertos is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* As a special exception, you may use this file as part of a free software
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* library without restriction. Specifically, if other files instantiate
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* templates or use macros or inline functions from this file, or you compile
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* this file and link it with other files to produce an executable, this
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* file does not by itself cause the resulting executable to be covered by
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* the GNU General Public License. This exception does not however
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* invalidate any other reasons why the executable file might be covered by
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* the GNU General Public License.
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*
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* Copyright 2003, 2004 Develer S.r.l. (http://www.develer.com/)
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* All Rights Reserved.
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* -->
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*
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* \brief Driver for the 24xx16 and 24xx256 I2C EEPROMS.
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*
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* \author Stefano Fedrigo <aleph@develer.com>
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* \author Bernie Innocenti <bernie@codewiz.org>
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*
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* $WIZ$ module_name = "eeprom"
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* $WIZ$ module_configuration = "bertos/cfg/cfg_eeprom.h"
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* $WIZ$ module_depends = "kfile", "kfile_block", "kblock", "i2c"
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*/
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#ifndef DRV_EEPROM_H
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#define DRV_EEPROM_H
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#include "cfg/cfg_eeprom.h"
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#include <cfg/compiler.h>
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#include <cfg/debug.h>
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#include <drv/i2c.h>
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#include <io/kblock.h>
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#include <io/kfile.h>
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#include <io/kfile_block.h>
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#include <cpu/attr.h>
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#if COMPILER_C99
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#define eeprom_init(...) PP_CAT(eeprom_init ## _, COUNT_PARMS(__VA_ARGS__)) (__VA_ARGS__)
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#define eeprom_verify(...) PP_CAT(eeprom_verify ## _, COUNT_PARMS(__VA_ARGS__)) (__VA_ARGS__)
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#else
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#define eeprom_init(args...) PP_CAT(eeprom_init ## _, COUNT_PARMS(args)) (args)
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#define eeprom_verify(args...) PP_CAT(eeprom_verify ## _, COUNT_PARMS(args)) (args)
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#endif
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/**
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* Values for Eeprom types.
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*/
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typedef enum EepromType
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{
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EEPROM_24XX08,
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EEPROM_24XX16,
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EEPROM_24XX256,
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EEPROM_24XX512,
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EEPROM_24XX1024,
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EEPROM_CNT,
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} EepromType;
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/**
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* On the same I2C bus can live more than one EEPROM
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* device. Each device can be addressed by one or more
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* pins.
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*/
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typedef uint8_t e2dev_addr_t;
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/**
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* Describe an EEPROM context, used by the driver to
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* access the single device.
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*/
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typedef struct Eeprom
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{
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KBlock blk;
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I2c *i2c;
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EepromType type; ///< EEPROM type
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e2dev_addr_t addr; ///< Device address.
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bool verify;
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#if !CONFIG_EEPROM_DISABLE_OLD_API
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union {
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KFile fd;
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KFileBlock fdblk;
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} DEPRECATED;
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#endif /* !CONFIG_EEPROM_DISABLE_OLD_API */
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} Eeprom;
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#if !CONFIG_EEPROM_DISABLE_OLD_API
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STATIC_ASSERT(offsetof(Eeprom, fd) == offsetof(Eeprom, fdblk.fd));
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#endif /* !CONFIG_EEPROM_DISABLE_OLD_API */
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/**
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* ID for eeproms.
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*/
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#define KBT_EEPROM MAKE_ID('E', 'E', 'P', 'R')
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/**
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* Convert + ASSERT from generic KFile to Eeprom.
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*/
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INLINE Eeprom * EEPROM_CAST_KBLOCK(KBlock *blk)
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{
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ASSERT(blk->priv.type == KBT_EEPROM);
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return (Eeprom *)blk;
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}
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/// Type for EEPROM addresses
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typedef uint16_t e2addr_t;
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/**
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* Macro for E2Layout offset calculation
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*
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* \note We can't just use offsetof() here because we could use
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* non-constant expressions to access array elements.
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*
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* \note 'type' is the structure type holding eeprom layout
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* and must be defined in user files.
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*/
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#define e2addr(type, field) ((e2addr_t)&(((type *)0)->field))
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/**
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* Type for EEPROM block size.
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*/
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typedef uint16_t e2blk_size_t;
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/**
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* Type for accessing EEPROM whole size.
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*/
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typedef uint32_t e2_size_t;
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/**
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* Descrive all EEPROM informations
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* needed by the driver.
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*/
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typedef struct EepromInfo
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{
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bool has_dev_addr; ///< true if memory is device addressable (its A0, A1, A2 pin are used by memory).
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e2blk_size_t blk_size; ///< block size
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e2_size_t e2_size; ///< eeprom size
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} EepromInfo;
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bool eeprom_erase(Eeprom *eep, e2addr_t addr, e2_size_t count);
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bool eeprom_verify_4(Eeprom *eep, e2addr_t addr, const void *buf, size_t count);
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void eeprom_init_5(Eeprom *eep, I2c *i2c, EepromType type, e2dev_addr_t addr, bool verify);
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#if !CONFIG_EEPROM_DISABLE_OLD_API
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DEPRECATED INLINE bool eeprom_verify_3(Eeprom *eep, const void *buf, size_t count)
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{
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return eeprom_verify_4(eep, (e2addr_t)eep->fdblk.fd.seek_pos, buf, count);
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}
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DEPRECATED INLINE void eeprom_init_4(Eeprom *eep, EepromType type, e2dev_addr_t addr, bool verify)
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{
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eeprom_init_5(eep, &local_i2c_old_api, type, addr, verify);
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kfileblock_init(&eep->fdblk, &eep->blk);
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}
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#endif /* !CONFIG_EEPROM_DISABLE_OLD_API */
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#endif /* DRV_EEPROM_H */
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