linux-kernel - [PATCH v8 09/13] slimbus: core: add common defines required for controllers

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Date:   Thu, 30 Nov 2017 17:41:56 +0000
From:   srinivas.kandagatla@...aro.org
To:     gregkh@...uxfoundation.org, broonie@...nel.org,
        alsa-devel@...a-project.org
Cc:     sdharia@...eaurora.org, bp@...e.de, poeschel@...onage.de,
        treding@...dia.com, andreas.noever@...il.com, alan@...ux.intel.com,
        mathieu.poirier@...aro.org, daniel@...ll.ch, jkosina@...e.cz,
        sharon.dvir1@...l.huji.ac.il, joe@...ches.com, davem@...emloft.net,
        james.hogan@...tec.com, michael.opdenacker@...e-electrons.com,
        robh+dt@...nel.org, pawel.moll@....com, mark.rutland@....com,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, vinod.koul@...el.com, arnd@...db.de,
        srinivas.kandagatla@...aro.org
Subject: [PATCH v8 09/13] slimbus: core: add common defines required for controllers

From: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>

This patch adds some common constant defines which are required
for qcom slim controller driver.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
---
 drivers/slimbus/slimbus.h | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/drivers/slimbus/slimbus.h b/drivers/slimbus/slimbus.h
index e0ae7bb1ba47..d278c951ddbf 100644
--- a/drivers/slimbus/slimbus.h
+++ b/drivers/slimbus/slimbus.h
@@ -18,9 +18,38 @@
 #include <linux/completion.h>
 #include <linux/slimbus.h>
 
+/* Standard values per SLIMbus spec needed by controllers and devices */
+#define SLIM_CL_PER_SUPERFRAME		6144
+#define SLIM_CL_PER_SUPERFRAME_DIV8	(SLIM_CL_PER_SUPERFRAME >> 3)
+
 /* SLIMbus message types. Related to interpretation of message code. */
 #define SLIM_MSG_MT_CORE			0x0
 
+/*
+ * SLIM Broadcast header format
+ * BYTE 0: MT[7:5] RL[4:0]
+ * BYTE 1: RSVD[7] MC[6:0]
+ * BYTE 2: RSVD[7:6] DT[5:4] PI[3:0]
+ */
+#define SLIM_MSG_MT_MASK	GENMASK(2, 0)
+#define SLIM_MSG_MT_SHIFT	5
+#define SLIM_MSG_RL_MASK	GENMASK(4, 0)
+#define SLIM_MSG_RL_SHIFT	0
+#define SLIM_MSG_MC_MASK	GENMASK(6, 0)
+#define SLIM_MSG_MC_SHIFT	0
+#define SLIM_MSG_DT_MASK	GENMASK(1, 0)
+#define SLIM_MSG_DT_SHIFT	4
+
+#define SLIM_HEADER_GET_MT(b)	((b >> SLIM_MSG_MT_SHIFT) & SLIM_MSG_MT_MASK)
+#define SLIM_HEADER_GET_RL(b)	((b >> SLIM_MSG_RL_SHIFT) & SLIM_MSG_RL_MASK)
+#define SLIM_HEADER_GET_MC(b)	((b >> SLIM_MSG_MC_SHIFT) & SLIM_MSG_MC_MASK)
+#define SLIM_HEADER_GET_DT(b)	((b >> SLIM_MSG_DT_SHIFT) & SLIM_MSG_DT_MASK)
+
+/* Device management messages used by this framework */
+#define SLIM_MSG_MC_REPORT_PRESENT               0x1
+#define SLIM_MSG_MC_ASSIGN_LOGICAL_ADDRESS       0x2
+#define SLIM_MSG_MC_REPORT_ABSENT                0xF
+
 /* Clock pause Reconfiguration messages */
 #define SLIM_MSG_MC_BEGIN_RECONFIGURATION        0x40
 #define SLIM_MSG_MC_NEXT_PAUSE_CLOCK             0x4A
@@ -101,6 +130,10 @@ struct slim_msg_txn {
 #define DEFINE_SLIM_BCAST_TXN(name, mc, rl, la, msg) \
 	struct slim_msg_txn name = { rl, 0, mc, SLIM_MSG_DEST_BROADCAST, 0,\
 					0, la, msg, }
+
+#define DEFINE_SLIM_EDEST_TXN(name, mc, rl, la, msg) \
+	struct slim_msg_txn name = { rl, 0, mc, SLIM_MSG_DEST_ENUMADDR, 0,\
+					0, la, msg, }
 /**
  * enum slim_clk_state: SLIMbus controller's clock state used internally for
  *	maintaining current clock state.
-- 
2.15.0