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/*
* Miscellaneous functions for IDT EB434 board
*
* Copyright 2004 IDT Inc. (rischelp@idt.com)
* Copyright 2006 Phil Sutter <n0-1@freewrt.org>
* Copyright 2007 Florian Fainelli <florian@openwrt.org>
*
* 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.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/spinlock.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <asm/addrspace.h>
#include <asm/gpio.h>
#include <asm/rc32434/rb.h>
#define GPIO_BADDR 0x18050000
static volatile unsigned char *devCtl3Base;
static unsigned char latchU5State;
static spinlock_t clu5Lock = SPIN_LOCK_UNLOCKED;
struct rb500_gpio_reg __iomem *rb500_gpio_reg0;
EXPORT_SYMBOL(rb500_gpio_reg0);
static struct resource rb500_gpio_reg0_res[] = {
{
.name = "gpio_reg0",
.start = GPIO_BADDR,
.end = GPIO_BADDR + sizeof(struct rb500_gpio_reg),
.flags = IORESOURCE_MEM,
}
};
void set434Reg(unsigned regOffs, unsigned bit, unsigned len, unsigned val)
{
unsigned flags, data;
unsigned i = 0;
spin_lock_irqsave(&clu5Lock, flags);
data = *(volatile unsigned *) (IDT434_REG_BASE + regOffs);
for (i = 0; i != len; ++i) {
if (val & (1 << i))
data |= (1 << (i + bit));
else
data &= ~(1 << (i + bit));
}
*(volatile unsigned *) (IDT434_REG_BASE + regOffs) = data;
spin_unlock_irqrestore(&clu5Lock, flags);
}
EXPORT_SYMBOL(set434Reg);
void changeLatchU5(unsigned char orMask, unsigned char nandMask)
{
unsigned flags;
spin_lock_irqsave(&clu5Lock, flags);
latchU5State = (latchU5State | orMask) & ~nandMask;
if (!devCtl3Base)
devCtl3Base = (volatile unsigned char *)
KSEG1ADDR(*(volatile unsigned *)
KSEG1ADDR(0x18010030));
*devCtl3Base = latchU5State;
spin_unlock_irqrestore(&clu5Lock, flags);
}
EXPORT_SYMBOL(changeLatchU5);
unsigned char getLatchU5State(void)
{
return latchU5State;
}
EXPORT_SYMBOL(getLatchU5State);
int rb500_gpio_get_value(unsigned gpio)
{
return readl(&rb500_gpio_reg0->gpiod) & (1 << gpio);
}
EXPORT_SYMBOL(rb500_gpio_get_value);
void rb500_gpio_set_value(unsigned gpio, int value)
{
unsigned tmp;
tmp = readl(&rb500_gpio_reg0->gpiod) & ~(1 << gpio);
if (value)
tmp |= 1 << gpio;
writel(tmp, (void *)&rb500_gpio_reg0->gpiod);
}
EXPORT_SYMBOL(rb500_gpio_set_value);
int rb500_gpio_direction_input(unsigned gpio)
{
writel(readl(&rb500_gpio_reg0->gpiocfg) & ~(1 << gpio), (void *)&rb500_gpio_reg0->gpiocfg);
return 0;
}
EXPORT_SYMBOL(rb500_gpio_direction_input);
int rb500_gpio_direction_output(unsigned gpio, int value)
{
gpio_set_value(gpio, value);
writel(readl(&rb500_gpio_reg0->gpiocfg) | (1 << gpio), (void *)&rb500_gpio_reg0->gpiocfg);
return 0;
}
EXPORT_SYMBOL(rb500_gpio_direction_output);
void rb500_gpio_set_int_level(unsigned gpio, int value)
{
unsigned tmp;
tmp = readl(&rb500_gpio_reg0->gpioilevel) & ~(1 << gpio);
if (value)
tmp |= 1 << gpio;
writel(tmp, (void *)&rb500_gpio_reg0->gpioilevel);
}
EXPORT_SYMBOL(rb500_gpio_set_int_level);
int rb500_gpio_get_int_level(unsigned gpio)
{
return readl(&rb500_gpio_reg0->gpioilevel) & (1 << gpio);
}
EXPORT_SYMBOL(rb500_gpio_get_int_level);
void rb500_gpio_set_int_status(unsigned gpio, int value)
{
unsigned tmp;
tmp = readl(&rb500_gpio_reg0->gpioistat);
if (value)
tmp |= 1 << gpio;
writel(tmp, (void *)&rb500_gpio_reg0->gpioistat);
}
EXPORT_SYMBOL(rb500_gpio_set_int_status);
int rb500_gpio_get_int_status(unsigned gpio)
{
return readl(&rb500_gpio_reg0->gpioistat) & (1 << gpio);
}
EXPORT_SYMBOL(rb500_gpio_get_int_status);
void rb500_gpio_set_func(unsigned gpio, int value)
{
unsigned tmp;
tmp = readl(&rb500_gpio_reg0->gpiofunc);
if (value)
tmp |= 1 << gpio;
writel(tmp, (void *)&rb500_gpio_reg0->gpiofunc);
}
EXPORT_SYMBOL(rb500_gpio_set_func);
int rb500_gpio_get_func(unsigned gpio)
{
return readl(&rb500_gpio_reg0->gpiofunc) & (1 << gpio);
}
EXPORT_SYMBOL(rb500_gpio_get_func);
int __init rb500_gpio_init(void)
{
rb500_gpio_reg0 = ioremap_nocache(rb500_gpio_reg0_res[0].start,
rb500_gpio_reg0_res[0].end -
rb500_gpio_reg0_res[0].start);
if (!rb500_gpio_reg0) {
printk(KERN_ERR "rb500: cannot remap GPIO register 0\n");
return -ENXIO;
}
return 0;
}
arch_initcall(rb500_gpio_init);
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