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[bitbash] Add optional open() and close() methods for bit-bashing interfaces

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Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2012-08-24 17:25:14 +01:00
parent 5676abead2
commit d1949f2737
3 changed files with 48 additions and 1 deletions
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32
src/include/ipxe/bitbash.h
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@@ -13,6 +13,18 @@ struct bit_basher;
/** Bit-bashing operations */
struct bit_basher_operations {
/**
* Open bit-bashing interface (optional)
*
* @v basher Bit-bashing interface
*/
void ( * open ) ( struct bit_basher *basher );
/**
* Close bit-bashing interface (optional)
*
* @v basher Bit-bashing interface
*/
void ( * close ) ( struct bit_basher *basher );
/**
* Set/clear output bit
*
@@ -45,6 +57,26 @@ struct bit_basher {
struct bit_basher_operations *op;
};
/**
* Open bit-bashing interface
*
* @v basher Bit-bashing interface
*/
static inline void open_bit ( struct bit_basher *basher ) {
if ( basher->op->open )
basher->op->open ( basher );
}
/**
* Close bit-bashing interface
*
* @v basher Bit-bashing interface
*/
static inline void close_bit ( struct bit_basher *basher ) {
if ( basher->op->close )
basher->op->close ( basher );
}
extern void write_bit ( struct bit_basher *basher, unsigned int bit_id,
unsigned long data );
extern int read_bit ( struct bit_basher *basher, unsigned int bit_id );