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Abstracted out part of the concept of an SPI device to a generalised NVS

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device.

Separated the mechanisms of non-volatile storage access and non-volatile
stored options.
This commit is contained in:
Michael Brown
2006-12-04 18:23:06 +00:00
parent dc06c895fc
commit 946967f09c
12 changed files with 275 additions and 240 deletions
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60
src/include/gpxe/threewire.h
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@@ -22,40 +22,48 @@
/** @} */
extern int threewire_read ( struct nvs_device *nvs, unsigned int address,
void *data, size_t len );
/**
* @defgroup spidevs SPI device types
* @defgroup tdevs Three-wire device types
* @{
*/
/** Atmel AT93C46 serial EEPROM
*
* @v org Word size (8 or 16)
*/
#define AT93C46( org ) { \
.word_len = (org), \
.size = ( 1024 / (org) ), \
.block_size = 1, \
.command_len = 3, \
.address_len = ( ( (org) == 8 ) ? 7 : 6 ), \
.read = threewire_read, \
}
static inline __attribute__ (( always_inline )) void
init_at93cx6 ( struct spi_device *device, unsigned int organisation ) {
device->nvs.word_len = organisation;
device->nvs.block_size = 1;
device->command_len = 3,
device->nvs.read = threewire_read;
}
/** Atmel AT93C56 serial EEPROM
/**
* Initialise Atmel AT93C46 serial EEPROM
*
* @v org Word size (8 or 16)
* @v device SPI device
* @v organisation Word organisation (8 or 16)
*/
#define AT93C56( org ) { \
.word_len = (org), \
.size = ( 2048 / (org) ), \
.block_size = 1, \
.command_len = 3, \
.address_len = ( ( (org) == 8 ) ? 9 : 8 ), \
.read = threewire_read, \
}
static inline __attribute__ (( always_inline )) void
init_at93c46 ( struct spi_device *device, unsigned int organisation ) {
device->nvs.size = ( 1024 / organisation );
device->address_len = ( ( organisation == 8 ) ? 7 : 6 );
init_at93cx6 ( device, organisation );
}
/**
* Initialise Atmel AT93C56 serial EEPROM
*
* @v device SPI device
* @v organisation Word organisation (8 or 16)
*/
static inline __attribute__ (( always_inline )) void
init_at93c56 ( struct spi_device *device, unsigned int organisation ) {
device->nvs.size = ( 2048 / organisation );
device->address_len = ( ( organisation == 8 ) ? 9 : 8 );
init_at93cx6 ( device, organisation );
}
/** @} */
extern int threewire_read ( struct spi_device *device, unsigned int address,
void *data, size_t len );
#endif /* _GPXE_THREEWIRE_H */