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/*
* linux/drivers/i2c/i2c-frodo.c
*
* Author: Abraham van der Merwe <abraham@2d3d.co.za>
*
* An I2C adapter driver for the 2d3D, Inc. StrongARM SA-1110
* Development board (Frodo).
*
* This source code is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>
#include <asm/hardware.h>
static void frodo_setsda (void *data,int state)
{
if (state)
FRODO_CPLD_I2C |= FRODO_I2C_SDA_OUT;
else
FRODO_CPLD_I2C &= ~FRODO_I2C_SDA_OUT;
}
static void frodo_setscl (void *data,int state)
{
if (state)
FRODO_CPLD_I2C |= FRODO_I2C_SCL_OUT;
else
FRODO_CPLD_I2C &= ~FRODO_I2C_SCL_OUT;
}
static int frodo_getsda (void *data)
{
return ((FRODO_CPLD_I2C & FRODO_I2C_SDA_IN) != 0);
}
static int frodo_getscl (void *data)
{
return ((FRODO_CPLD_I2C & FRODO_I2C_SCL_IN) != 0);
}
static struct i2c_algo_bit_data bit_frodo_data = {
.setsda = frodo_setsda,
.setscl = frodo_setscl,
.getsda = frodo_getsda,
.getscl = frodo_getscl,
.udelay = 80,
.mdelay = 80,
.timeout = HZ
};
static struct i2c_adapter frodo_ops = {
.owner = THIS_MODULE,
.id = I2C_HW_B_FRODO,
.algo_data = &bit_frodo_data,
.dev = {
.name = "Frodo adapter driver",
},
};
static int __init i2c_frodo_init (void)
{
return i2c_bit_add_bus(&frodo_ops);
}
static void __exit i2c_frodo_exit (void)
{
i2c_bit_del_bus(&frodo_ops);
}
MODULE_AUTHOR ("Abraham van der Merwe <abraham@2d3d.co.za>");
MODULE_DESCRIPTION ("I2C-Bus adapter routines for Frodo");
MODULE_LICENSE ("GPL");
module_init (i2c_frodo_init);
module_exit (i2c_frodo_exit);
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