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soundwire: define and use addr bit masks

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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: Vinod Koul <vkoul@kernel.org>
Tested-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20200903114504.1202143-2-vkoul@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Vinod Koul 2020-09-03 17:14:56 +05:30
parent 5ee74eb280
commit 25e804926d
1 changed files with 13 additions and 6 deletions
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19
include/linux/soundwire/sdw.h
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@ -5,6 +5,7 @@
#define __SOUNDWIRE_H #define __SOUNDWIRE_H
#include <linux/mod_devicetable.h> #include <linux/mod_devicetable.h>
#include <linux/bitfield.h>
struct sdw_bus; struct sdw_bus;
struct sdw_slave; 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 * The MIPI DisCo for SoundWire defines in addition the link_id as bits 51:48
*/ */
#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(adr) (((adr) >> 48) & GENMASK(3, 0)) #define SDW_DISCO_LINK_ID(addr) FIELD_GET(SDW_DISCO_LINK_ID_MASK, addr)
#define SDW_VERSION(adr) (((adr) >> 44) & GENMASK(3, 0)) #define SDW_VERSION(addr) FIELD_GET(SDW_VERSION_MASK, addr)
#define SDW_UNIQUE_ID(adr) (((adr) >> 40) & GENMASK(3, 0)) #define SDW_UNIQUE_ID(addr) FIELD_GET(SDW_UNIQUE_ID_MASK, addr)
#define SDW_MFG_ID(adr) (((adr) >> 24) & GENMASK(15, 0)) #define SDW_MFG_ID(addr) FIELD_GET(SDW_MFG_ID_MASK, addr)
#define SDW_PART_ID(adr) (((adr) >> 8) & GENMASK(15, 0)) #define SDW_PART_ID(addr) FIELD_GET(SDW_PART_ID_MASK, addr)
#define SDW_CLASS_ID(adr) ((adr) & GENMASK(7, 0)) #define SDW_CLASS_ID(addr) FIELD_GET(SDW_CLASS_ID_MASK, addr)
/** /**
* struct sdw_slave_intr_status - Slave interrupt status * struct sdw_slave_intr_status - Slave interrupt status