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-rw-r--r--gpxe/src/include/gpxe/threewire.h105
1 files changed, 0 insertions, 105 deletions
diff --git a/gpxe/src/include/gpxe/threewire.h b/gpxe/src/include/gpxe/threewire.h
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--- a/gpxe/src/include/gpxe/threewire.h
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-#ifndef _GPXE_THREEWIRE_H
-#define _GPXE_THREEWIRE_H
-
-/** @file
- *
- * Three-wire serial interface
- *
- * The Atmel three-wire interface is a subset of the (newer) SPI
- * interface, and is implemented here as a layer on top of the SPI
- * support.
- */
-
-FILE_LICENCE ( GPL2_OR_LATER );
-
-#include <gpxe/spi.h>
-#include <limits.h>
-
-/**
- * @defgroup tcmds Three-wire commands
- * @{
- */
-
-/** Read data from memory array */
-#define THREEWIRE_READ 0x6
-
-/** Write data to memory array */
-#define THREEWIRE_WRITE 0x5
-
-/** Write enable */
-#define THREEWIRE_EWEN 0x4
-
-/** Address to be used for write enable command */
-#define THREEWIRE_EWEN_ADDRESS INT_MAX
-
-/** Time to wait for write cycles to complete
- *
- * This is sufficient for AT93C46/AT93C56 devices, but may need to be
- * increased in future when other devices are added.
- */
-#define THREEWIRE_WRITE_MDELAY 10
-
-/** @} */
-
-extern int threewire_read ( struct nvs_device *nvs, unsigned int address,
- void *data, size_t len );
-extern int threewire_write ( struct nvs_device *nvs, unsigned int address,
- const void *data, size_t len );
-extern int threewire_detect_address_len ( struct spi_device *device );
-
-/**
- * @defgroup tdevs Three-wire device types
- * @{
- */
-
-static inline __attribute__ (( always_inline )) void
-init_at93cx6 ( struct spi_device *device, unsigned int organisation ) {
- device->nvs.word_len_log2 = ( ( organisation == 8 ) ? 0 : 1 );
- device->nvs.block_size = 1;
- device->command_len = 3,
- device->nvs.read = threewire_read;
- device->nvs.write = threewire_write;
-}
-
-/**
- * Initialise Atmel AT93C46 serial EEPROM
- *
- * @v device SPI device
- * @v organisation Word organisation (8 or 16)
- */
-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 );
-}
-
-/**
- * Initialise Atmel AT93C66 serial EEPROM
- *
- * @v device SPI device
- * @v organisation Word organisation (8 or 16)
- */
-static inline __attribute__ (( always_inline )) void
-init_at93c66 ( struct spi_device *device, unsigned int organisation ) {
- device->nvs.size = ( 4096 / organisation );
- device->address_len = ( ( organisation == 8 ) ? 9 : 8 );
- init_at93cx6 ( device, organisation );
-}
-
-/** @} */
-
-#endif /* _GPXE_THREEWIRE_H */