jornada720_ssp.c File Reference

#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/sched.h>
#include <linux/io.h>
#include <mach/hardware.h>
#include <mach/jornada720.h>
#include <asm/hardware/ssp.h>

Go to the source code of this file.

Functions
u8	jornada_ssp_reverse (u8 byte)
	EXPORT_SYMBOL (jornada_ssp_reverse)
int	jornada_ssp_byte (u8 byte)
	EXPORT_SYMBOL (jornada_ssp_byte)
int	jornada_ssp_inout (u8 byte)
	EXPORT_SYMBOL (jornada_ssp_inout)
void	jornada_ssp_start (void)
	EXPORT_SYMBOL (jornada_ssp_start)
void	jornada_ssp_end (void)
	EXPORT_SYMBOL (jornada_ssp_end)
	module_init (jornada_ssp_init)

Variables
struct platform_driver	jornadassp_driver

Function Documentation

EXPORT_SYMBOL

(

jornada_ssp_reverse

)

EXPORT_SYMBOL

(

jornada_ssp_byte

)

EXPORT_SYMBOL

(

jornada_ssp_inout

)

EXPORT_SYMBOL

(

jornada_ssp_start

)

EXPORT_SYMBOL

(

jornada_ssp_end

)

int jornada_ssp_byte

(

u8

byte

)

jornada_ssp_byte - waits for ready ssp bus and sends byte

waits for fifo buffer to clear and then transmits, if it doesn't then we will timeout after <timeout> rounds. Needs mcu running before its called.

returns : mcu output on success : %-ETIMEDOUT on timeout

Definition at line 59 of file jornada720_ssp.c.

void jornada_ssp_end

(

void

)

jornada_ssp_end - disable mcu and turn off lock

Definition at line 125 of file jornada720_ssp.c.

int jornada_ssp_inout

(

u8

byte

)

jornada_ssp_inout - decide if input is command or trading byte

returns : (jornada_ssp_byte(byte)) on success : %-ETIMEDOUT on timeout failure

Definition at line 87 of file jornada720_ssp.c.

u8 jornada_ssp_reverse ( u8  byte )

inline

jornada_ssp_reverse - reverses input byte

we need to reverse all data we receive from the mcu due to its physical location returns : 01110111 -> 11101110

Definition at line 36 of file jornada720_ssp.c.

void jornada_ssp_start

(

void

)

jornada_ssp_start - enable mcu

Definition at line 112 of file jornada720_ssp.c.

module_init

(

jornada_ssp_init

)

Variable Documentation

struct platform_driver jornadassp_driver

Initial value:

= {
    .probe  = jornada_ssp_probe,
    .remove = jornada_ssp_remove,
    .driver = {
        .name   = "jornada_ssp",
    },
}

Definition at line 190 of file jornada720_ssp.c.