/*
* 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/gpio.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/mach-rc32434/rb.h>
struct rb532_gpio_reg __iomem *rb532_gpio_reg0;
EXPORT_SYMBOL(rb532_gpio_reg0);
struct mpmc_device dev3;
static struct resource rb532_gpio_reg0_res[] = {
{
.name = "gpio_reg0",
.start = (u32)(IDT434_REG_BASE + GPIOBASE),
.end = (u32)(IDT434_REG_BASE + GPIOBASE + sizeof(struct rb532_gpio_reg)),
.flags = IORESOURCE_MEM,
}
};
static struct resource rb532_dev3_ctl_res[] = {
{
.name = "dev3_ctl",
.start = (u32)(IDT434_REG_BASE + DEV3BASE),
.end = (u32)(IDT434_REG_BASE + DEV3BASE + sizeof(struct dev_reg)),
.flags = IORESOURCE_MEM,
}
};
void set_434_reg(unsigned reg_offs, unsigned bit, unsigned len, unsigned val)
{
unsigned long flags;
unsigned data;
unsigned i = 0;
spin_lock_irqsave(&dev3.lock, flags);
data = *(volatile unsigned *) (IDT434_REG_BASE + reg_offs);
for (i = 0; i != len; ++i) {
if (val & (1 << i))
data |= (1 << (i + bit));
else
data &= ~(1 << (i + bit));
}
writel(data, (IDT434_REG_BASE + reg_offs));
spin_unlock_irqrestore(&dev3.lock, flags);
}
EXPORT_SYMBOL(set_434_reg);
unsigned get_434_reg(unsigned reg_offs)
{
return readl(IDT434_REG_BASE + reg_offs);
}
EXPORT_SYMBOL(get_434_reg);
void set_latch_u5(unsigned char or_mask, unsigned char nand_mask)
{
unsigned long flags;
spin_lock_irqsave(&dev3.lock, flags);
dev3.state = (dev3.state | or_mask) & ~nand_mask;
writel(dev3.state, &dev3.base);
spin_unlock_irqrestore(&dev3.lock, flags);
}
EXPORT_SYMBOL(set_latch_u5);
unsigned char get_latch_u5(void)
{
return dev3.state;
}
EXPORT_SYMBOL(get_latch_u5);
int rb532_gpio_get_value(unsigned gpio)
{
return readl(&rb532_gpio_reg0->gpiod) & (1 << gpio);
}
EXPORT_SYMBOL(rb532_gpio_get_value);
void rb532_gpio_set_value(unsigned gpio, int value)
{
unsigned tmp;
tmp = readl(&rb532_gpio_reg0->gpiod) & ~(1 << gpio);
if (value)
tmp |= 1 << gpio;
writel(tmp, (void *)&rb532_gpio_reg0->gpiod);
}
EXPORT_SYMBOL(rb532_gpio_set_value);
int rb532_gpio_direction_input(unsigned gpio)
{
writel(readl(&rb532_gpio_reg0->gpiocfg) & ~(1 << gpio),
(void *)&rb532_gpio_reg0->gpiocfg);
return 0;
}
EXPORT_SYMBOL(rb532_gpio_direction_input);
int rb532_gpio_direction_output(unsigned gpio, int value)
{
gpio_set_value(gpio, value);
writel(readl(&rb532_gpio_reg0->gpiocfg) | (1 << gpio),
(void *)&rb532_gpio_reg0->gpiocfg);
return 0;
}
EXPORT_SYMBOL(rb532_gpio_direction_output);
void rb532_gpio_set_int_level(unsigned gpio, int value)
{
unsigned tmp;
tmp = readl(&rb532_gpio_reg0->gpioilevel) & ~(1 << gpio);
if (value)
tmp |= 1 << gpio;
writel(tmp, (void *)&rb532_gpio_reg0->gpioilevel);
}
EXPORT_SYMBOL(rb532_gpio_set_int_level);
int rb532_gpio_get_int_level(unsigned gpio)
{
return readl(&rb532_gpio_reg0->gpioilevel) & (1 << gpio);
}
EXPORT_SYMBOL(rb532_gpio_get_int_level);
void rb532_gpio_set_int_status(unsigned gpio, int value)
{
unsigned tmp;
tmp = readl(&rb532_gpio_reg0->gpioistat);
if (value)
tmp |= 1 << gpio;
writel(tmp, (void *)&rb532_gpio_reg0->gpioistat);
}
EXPORT_SYMBOL(rb532_gpio_set_int_status);
int rb532_gpio_get_int_status(unsigned gpio)
{
return readl(&rb532_gpio_reg0->gpioistat) & (1 << gpio);
}
EXPORT_SYMBOL(rb532_gpio_get_int_status);
void rb532_gpio_set_func(unsigned gpio, int value)
{
unsigned tmp;
tmp = readl(&rb532_gpio_reg0->gpiofunc);
if (value)
tmp |= 1 << gpio;
writel(tmp, (void *)&rb532_gpio_reg0->gpiofunc);
}
EXPORT_SYMBOL(rb532_gpio_set_func);
int rb532_gpio_get_func(unsigned gpio)
{
return readl(&rb532_gpio_reg0->gpiofunc) & (1 << gpio);
}
EXPORT_SYMBOL(rb532_gpio_get_func);
int __init rb532_gpio_init(void)
{
rb532_gpio_reg0 = ioremap_nocache(rb532_gpio_reg0_res[0].start,
rb532_gpio_reg0_res[0].end -
rb532_gpio_reg0_res[0].start);
if (!rb532_gpio_reg0) {
printk(KERN_ERR "rb532: cannot remap GPIO register 0\n");
return -ENXIO;
}
dev3.base = ioremap_nocache(rb532_dev3_ctl_res[0].start,
rb532_dev3_ctl_res[0].end -
rb532_dev3_ctl_res[0].start);
if (!dev3.base) {
printk(KERN_ERR "rb532: cannot remap device controller 3\n");
return -ENXIO;
}
return 0;
}
arch_initcall(rb532_gpio_init);
