221 lines
5.7 KiB
C
221 lines
5.7 KiB
C
![]() |
/*
|
||
|
* 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 flags, 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 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);
|