diff options
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/gpxe/threewire.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/include/gpxe/threewire.h b/src/include/gpxe/threewire.h index d60e1a714..865fc25d5 100644 --- a/src/include/gpxe/threewire.h +++ b/src/include/gpxe/threewire.h @@ -11,6 +11,7 @@ */ #include <gpxe/spi.h> +#include <limits.h> /** * @defgroup tcmds Three-wire commands @@ -20,10 +21,28 @@ /** 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 ); /** * @defgroup tdevs Three-wire device types @@ -36,6 +55,7 @@ init_at93cx6 ( struct spi_device *device, unsigned int organisation ) { device->nvs.block_size = 1; device->command_len = 3, device->nvs.read = threewire_read; + device->nvs.write = threewire_write; } /** |