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Commit fea9cf32 authored by Benjamin Herrenschmidt's avatar Benjamin Herrenschmidt
Browse files

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: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
Reviewed-by: default avatarJoel Stanley <joel@jms.id.au>
parent 8ef9ccf8

drivers/fsi/fsi-master-gpio.c

+0 −29
Original line number Original line Diff line number Diff line
@@ -17,35 +17,6 @@ 
#include "fsi-master.h"

#include "fsi-master.h"





#define	FSI_GPIO_STD_DLY	1	/* Standard pin delay in nS */

#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

#define LAST_ADDR_INVALID		0x1





struct fsi_master_gpio {

struct fsi_master_gpio {

drivers/fsi/fsi-master.h

+33 −0
Original line number Original line Diff line number Diff line
@@ -19,6 +19,39 @@ 




#include <linux/device.h>

#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

#define FSI_MASTER_FLAG_SWCLOCK		0x1





struct fsi_master {

struct fsi_master {