Commit 25e80492 authored by Vinod Koul's avatar Vinod Koul
Browse files

soundwire: define and use addr bit masks 



Soundwire addr is a 52bit value encoding link, version, unique id,
mfg id, part id and class id. Define bit masks for these and use
FIELD_GET() to extract these fields.

Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
Tested-by: default avatarBard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20200903114504.1202143-2-vkoul@kernel.org


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 5ee74eb2

include/linux/soundwire/sdw.h

+14 −7
Original line number Diff line number Diff line
@@ -5,6 +5,7 @@ 
#define __SOUNDWIRE_H



#include <linux/mod_devicetable.h>

#include <linux/bitfield.h>



struct sdw_bus;

struct sdw_slave;
@@ -456,13 +457,19 @@ struct sdw_slave_id { 
 *

 * The MIPI DisCo for SoundWire defines in addition the link_id as bits 51:48

 */



#define SDW_DISCO_LINK_ID(adr)	(((adr) >> 48) & GENMASK(3, 0))

#define SDW_VERSION(adr)	(((adr) >> 44) & GENMASK(3, 0))

#define SDW_UNIQUE_ID(adr)	(((adr) >> 40) & GENMASK(3, 0))

#define SDW_MFG_ID(adr)		(((adr) >> 24) & GENMASK(15, 0))

#define SDW_PART_ID(adr)	(((adr) >> 8) & GENMASK(15, 0))

#define SDW_CLASS_ID(adr)	((adr) & GENMASK(7, 0))

#define SDW_DISCO_LINK_ID_MASK	GENMASK_ULL(51, 48)

#define SDW_VERSION_MASK	GENMASK_ULL(47, 44)

#define SDW_UNIQUE_ID_MASK	GENMASK_ULL(43, 40)

#define SDW_MFG_ID_MASK		GENMASK_ULL(39, 24)

#define SDW_PART_ID_MASK	GENMASK_ULL(23, 8)

#define SDW_CLASS_ID_MASK	GENMASK_ULL(7, 0)



#define SDW_DISCO_LINK_ID(addr)	FIELD_GET(SDW_DISCO_LINK_ID_MASK, addr)

#define SDW_VERSION(addr)	FIELD_GET(SDW_VERSION_MASK, addr)

#define SDW_UNIQUE_ID(addr)	FIELD_GET(SDW_UNIQUE_ID_MASK, addr)

#define SDW_MFG_ID(addr)	FIELD_GET(SDW_MFG_ID_MASK, addr)

#define SDW_PART_ID(addr)	FIELD_GET(SDW_PART_ID_MASK, addr)

#define SDW_CLASS_ID(addr)	FIELD_GET(SDW_CLASS_ID_MASK, addr)



/**

 * struct sdw_slave_intr_status - Slave interrupt status