mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-25 06:05:20 +02:00
92 lines
1.9 KiB
C
92 lines
1.9 KiB
C
|
/*
|
||
|
|
* Copyright (C) 2007, OpenWrt.org, Florian Fainelli <florian@openwrt.org>
|
||
|
|
* RDC321x architecture specific GPIO support
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify it
|
||
|
|
* under the terms of the GNU General Public License as published by the
|
||
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
||
|
|
* option) any later version.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/autoconf.h>
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <linux/io.h>
|
||
|
|
#include <linux/types.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/delay.h>
|
||
|
|
|
||
|
|
#include <asm/mach-rdc/rdc321x_defs.h>
|
||
|
|
|
||
|
|
static inline int rdc_gpio_is_valid(unsigned gpio)
|
||
|
|
{
|
||
|
|
return (gpio <= RDC_MAX_GPIO);
|
||
|
|
}
|
||
|
|
|
||
|
|
static unsigned int rdc_gpio_read(unsigned gpio)
|
||
|
|
{
|
||
|
|
unsigned int val;
|
||
|
|
|
||
|
|
val = 0x80000000 | (7 << 11) | ((gpio&0x20?0x84:0x48));
|
||
|
|
outl(val, RDC3210_CFGREG_ADDR);
|
||
|
|
udelay(10);
|
||
|
|
val = inl(RDC3210_CFGREG_DATA);
|
||
|
|
val |= (0x1 << (gpio & 0x1F));
|
||
|
|
outl(val, RDC3210_CFGREG_DATA);
|
||
|
|
udelay(10);
|
||
|
|
val = 0x80000000 | (7 << 11) | ((gpio&0x20?0x88:0x4C));
|
||
|
|
outl(val, RDC3210_CFGREG_ADDR);
|
||
|
|
udelay(10);
|
||
|
|
val = inl(RDC3210_CFGREG_DATA);
|
||
|
|
|
||
|
|
return val;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void rdc_gpio_write(unsigned int val)
|
||
|
|
{
|
||
|
|
if (val) {
|
||
|
|
outl(val, RDC3210_CFGREG_DATA);
|
||
|
|
udelay(10);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
int rdc_gpio_get_value(unsigned gpio)
|
||
|
|
{
|
||
|
|
if (rdc_gpio_is_valid(gpio))
|
||
|
|
return (int)rdc_gpio_read(gpio);
|
||
|
|
else
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(rdc_gpio_get_value);
|
||
|
|
|
||
|
|
void rdc_gpio_set_value(unsigned gpio, int value)
|
||
|
|
{
|
||
|
|
unsigned int val;
|
||
|
|
|
||
|
|
if (!rdc_gpio_is_valid(gpio))
|
||
|
|
return;
|
||
|
|
|
||
|
|
val = rdc_gpio_read(gpio);
|
||
|
|
|
||
|
|
if (value)
|
||
|
|
val &= ~(0x1 << (gpio & 0x1F));
|
||
|
|
else
|
||
|
|
val |= (0x1 << (gpio & 0x1F));
|
||
|
|
|
||
|
|
rdc_gpio_write(val);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(rdc_gpio_set_value);
|
||
|
|
|
||
|
|
int rdc_gpio_direction_input(unsigned gpio)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(rdc_gpio_direction_input);
|
||
|
|
|
||
|
|
int rdc_gpio_direction_output(unsigned gpio, int value)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(rdc_gpio_direction_output);
|
||
|
|
|
||
|
|
|