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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@kernel.crashing.org>
Reviewed-by: Joel Stanley <joel@jms.id.au>
This commit is contained in:
Benjamin Herrenschmidt 2018-06-10 16:25:25 +10:00
parent 8ef9ccf810
commit fea9cf321c
2 changed files with 33 additions and 29 deletions
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29
drivers/fsi/fsi-master-gpio.c
View File

@ -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 {

33
drivers/fsi/fsi-master.h
View File

@ -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 {