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29 * Copyright 2003, 2004 Develer S.r.l. (http://www.develer.com/)
30 * All Rights Reserved.
33 * \brief Driver for the 24xx16 and 24xx256 I2C EEPROMS.
35 * \author Stefano Fedrigo <aleph@develer.com>
36 * \author Bernie Innocenti <bernie@codewiz.org>
38 * $WIZ$ module_name = "eeprom"
39 * $WIZ$ module_depends = "kfile", "i2c"
45 #define EEPROM_OLD_API 1
47 #include <cfg/compiler.h>
48 #include <cfg/debug.h>
52 #include <io/kblock.h>
54 #include <io/kfile_block.h>
59 #define eeprom_init(...) PP_CAT(eeprom_init ## _, COUNT_PARMS(__VA_ARGS__)) (__VA_ARGS__)
61 #define eeprom_init(args...) PP_CAT(eeprom_init ## _, COUNT_PARMS(args)) (args)
66 * Values for Eeprom types.
68 typedef enum EepromType
79 * On the same I2C bus can live more than one EEPROM
80 * device. Each device can be addressed by one or more
83 typedef uint8_t e2dev_addr_t;
86 * Describe an EEPROM context, used by the driver to
87 * access the single device.
93 EepromType type; ///< EEPROM type
94 e2dev_addr_t addr; ///< Device address.
105 STATIC_ASSERT(offsetof(Eeprom, fd) == offsetof(Eeprom, fdblk.fd));
111 #define KBT_EEPROM MAKE_ID('E', 'E', 'P', 'R')
114 * Convert + ASSERT from generic KFile to Eeprom.
116 INLINE Eeprom * EEPROM_CAST_KBLOCK(KBlock *blk)
118 ASSERT(blk->priv.type == KBT_EEPROM);
119 return (Eeprom *)blk;
122 /// Type for EEPROM addresses
123 typedef uint16_t e2addr_t;
126 * Macro for E2Layout offset calculation
128 * \note We can't just use offsetof() here because we could use
129 * non-constant expressions to access array elements.
131 * \note 'type' is the structure type holding eeprom layout
132 * and must be defined in user files.
134 #define e2addr(type, field) ((e2addr_t)&(((type *)0)->field))
137 * Type for EEPROM block size.
139 typedef uint16_t e2blk_size_t;
142 * Type for accessing EEPROM whole size.
144 typedef uint32_t e2_size_t;
147 * Descrive all EEPROM informations
148 * needed by the driver.
150 typedef struct EepromInfo
152 bool has_dev_addr; ///< true if memory is device addressable (its A0, A1, A2 pin are used by memory).
153 e2blk_size_t blk_size; ///< block size
154 e2_size_t e2_size; ///< eeprom size
157 void eeprom_init_5(Eeprom *blk, I2c *i2c, EepromType type, e2dev_addr_t addr, bool verify);
160 DEPRECATED bool eeprom_erase(Eeprom *fd, e2addr_t addr, e2_size_t count);
161 DEPRECATED bool eeprom_verify(Eeprom *fd, const void *buf, size_t count);
164 DEPRECATED INLINE void eeprom_init_4(Eeprom *ee, EepromType type, e2dev_addr_t addr, bool verify)
166 eeprom_init_5(ee, &local_i2c_old_api, type, addr, verify);
167 kfileblock_init(&ee->fdblk, &ee->blk);
172 #endif /* DRV_EEPROM_H */