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Diffstat (limited to 'include/linux/soundwire/sdw.h')
-rw-r--r--include/linux/soundwire/sdw.h23
1 files changed, 23 insertions, 0 deletions
diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h
index b451bb622335..56273c5c1f6b 100644
--- a/include/linux/soundwire/sdw.h
+++ b/include/linux/soundwire/sdw.h
@@ -424,6 +424,29 @@ struct sdw_slave_id {
__u8 sdw_version:4;
};
+/*
+ * Helper macros to extract the MIPI-defined IDs
+ *
+ * Spec definition
+ * Register Bit Contents
+ * DevId_0 [7:4] 47:44 sdw_version
+ * DevId_0 [3:0] 43:40 unique_id
+ * DevId_1 39:32 mfg_id [15:8]
+ * DevId_2 31:24 mfg_id [7:0]
+ * DevId_3 23:16 part_id [15:8]
+ * DevId_4 15:08 part_id [7:0]
+ * DevId_5 07:00 class_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))
+
/**
* struct sdw_slave_intr_status - Slave interrupt status
* @control_port: control port status