linux-kernel - [PATCH 10/14] fsi: Move various master definitions to a common header

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Message-Id: <20180626232605.13420-11-benh@kernel.crashing.org>
Date:   Wed, 27 Jun 2018 09:26:01 +1000
From:   Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:     Joel Stanley <joel@....id.au>
Cc:     linux-aspeed@...ts.ozlabs.org, openbmc@...ts.ozlabs.org,
        devicetree@...r.kernel.org, Andrew Jeffery <andrew@...id.au>,
        linux-kernel@...r.kernel.org,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>
Subject: [PATCH 10/14] fsi: Move various master definitions to a common header

This moves the definitions for various protocol details
(message & response codes, delays etc...) out of
fsi-master-gpio.c to fsi-master.h in order to share them
with other master implementations.

Signed-off-by: Benjamin Herrenschmidt <benh@...nel.crashing.org>
---
 drivers/fsi/fsi-master-gpio.c | 29 -----------------------------
 drivers/fsi/fsi-master.h      | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 33 insertions(+), 29 deletions(-)

diff --git a/drivers/fsi/fsi-master-gpio.c b/drivers/fsi/fsi-master-gpio.c
index bad7951a2677..edc257e40102 100644
--- a/drivers/fsi/fsi-master-gpio.c
+++ b/drivers/fsi/fsi-master-gpio.c
@@ -17,35 +17,6 @@
 #include "fsi-master.h"
 
 #define	FSI_GPIO_STD_DLY	1	/* Standard pin delay in nS */
-#define	FSI_ECHO_DELAY_CLOCKS	16	/* Number clocks for echo delay */
-#define	FSI_SEND_DELAY_CLOCKS	16	/* Number clocks for send delay */
-#define	FSI_PRE_BREAK_CLOCKS	50	/* Number clocks to prep for break */
-#define	FSI_BREAK_CLOCKS	256	/* Number of clocks to issue break */
-#define	FSI_POST_BREAK_CLOCKS	16000	/* Number clocks to set up cfam */
-#define	FSI_INIT_CLOCKS		5000	/* Clock out any old data */
-#define	FSI_MASTER_DPOLL_CLOCKS	50      /* < 21 will cause slave to hang */
-#define	FSI_MASTER_EPOLL_CLOCKS	50      /* Number of clocks for E_POLL retry */
-
-#define FSI_CRC_ERR_RETRIES	10
-
-#define	FSI_CMD_DPOLL		0x2
-#define	FSI_CMD_EPOLL		0x3
-#define	FSI_CMD_TERM		0x3f
-#define FSI_CMD_ABS_AR		0x4
-#define FSI_CMD_REL_AR		0x5
-#define FSI_CMD_SAME_AR		0x3	/* but only a 2-bit opcode... */
-
-/* Slave responses */
-#define	FSI_RESP_ACK		0	/* Success */
-#define	FSI_RESP_BUSY		1	/* Slave busy */
-#define	FSI_RESP_ERRA		2	/* Any (misc) Error */
-#define	FSI_RESP_ERRC		3	/* Slave reports master CRC error */
-
-#define	FSI_MASTER_MAX_BUSY	200
-
-#define	FSI_MASTER_MTOE_COUNT	1000
-#define	FSI_CRC_SIZE		4
-
 #define LAST_ADDR_INVALID		0x1
 
 struct fsi_master_gpio {
diff --git a/drivers/fsi/fsi-master.h b/drivers/fsi/fsi-master.h
index 7d619c68ab9b..f653f75da7be 100644
--- a/drivers/fsi/fsi-master.h
+++ b/drivers/fsi/fsi-master.h
@@ -19,6 +19,39 @@
 
 #include <linux/device.h>
 
+/* Various protocol delays */
+#define	FSI_ECHO_DELAY_CLOCKS	16	/* Number clocks for echo delay */
+#define	FSI_SEND_DELAY_CLOCKS	16	/* Number clocks for send delay */
+#define	FSI_PRE_BREAK_CLOCKS	50	/* Number clocks to prep for break */
+#define	FSI_BREAK_CLOCKS	256	/* Number of clocks to issue break */
+#define	FSI_POST_BREAK_CLOCKS	16000	/* Number clocks to set up cfam */
+#define	FSI_INIT_CLOCKS		5000	/* Clock out any old data */
+#define	FSI_MASTER_DPOLL_CLOCKS	50      /* < 21 will cause slave to hang */
+#define	FSI_MASTER_EPOLL_CLOCKS	50      /* Number of clocks for E_POLL retry */
+
+/* Various retry maximums */
+#define FSI_CRC_ERR_RETRIES	10
+#define	FSI_MASTER_MAX_BUSY	200
+#define	FSI_MASTER_MTOE_COUNT	1000
+
+/* Command encodings */
+#define	FSI_CMD_DPOLL		0x2
+#define	FSI_CMD_EPOLL		0x3
+#define	FSI_CMD_TERM		0x3f
+#define FSI_CMD_ABS_AR		0x4
+#define FSI_CMD_REL_AR		0x5
+#define FSI_CMD_SAME_AR		0x3	/* but only a 2-bit opcode... */
+
+/* Slave responses */
+#define	FSI_RESP_ACK		0	/* Success */
+#define	FSI_RESP_BUSY		1	/* Slave busy */
+#define	FSI_RESP_ERRA		2	/* Any (misc) Error */
+#define	FSI_RESP_ERRC		3	/* Slave reports master CRC error */
+
+/* Misc */
+#define	FSI_CRC_SIZE		4
+
+/* fsi-master definition and flags */
 #define FSI_MASTER_FLAG_SWCLOCK		0x1
 
 struct fsi_master {
-- 
2.17.1