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/*
* Copyright (C) 2007, OpenWrt.org, Florian Fainelli <florian@openwrt.org>
* 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.
*
* 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.
*
* Notes :
* au1000 SoC have only one GPIO line : GPIO1
* others have a second one : GPIO2
*/
#include <linux/init.h>
#include <linux/io.h>
#include <linux/types.h>
#include <linux/module.h>
#include <asm/addrspace.h>
#include <asm/mach-au1x00/au1000.h>
#include <asm/gpio.h>
#define gpio1 sys
#if !defined(CONFIG_SOC_AU1000)
static struct au1x00_gpio2 *const gpio2 = (struct au1x00_gpio2 *) GPIO2_BASE;
#define GPIO2_OUTPUT_ENABLE_MASK 0x00010000
static int au1xxx_gpio2_read(unsigned gpio)
{
gpio -= AU1XXX_GPIO_BASE;
return ((gpio2->pinstate >> gpio) & 0x01);
}
static void au1xxx_gpio2_write(unsigned gpio, int value)
{
gpio -= AU1XXX_GPIO_BASE;
gpio2->output = (GPIO2_OUTPUT_ENABLE_MASK << gpio) | (value << gpio);
}
static int au1xxx_gpio2_direction_input(unsigned gpio)
{
gpio -= AU1XXX_GPIO_BASE;
gpio2->dir &= ~(0x01 << gpio);
return 0;
}
static int au1xxx_gpio2_direction_output(unsigned gpio, int value)
{
gpio -= AU1XXX_GPIO_BASE;
gpio2->dir = (0x01 << gpio) | (value << gpio);
return 0;
}
#endif /* !defined(CONFIG_SOC_AU1000) */
static int au1xxx_gpio1_read(unsigned gpio)
{
return ((gpio1->pinstaterd >> gpio) & 0x01);
}
static void au1xxx_gpio1_write(unsigned gpio, int value)
{
if (value)
gpio1->outputset = (0x01 << gpio);
else
/* Output a zero */
gpio1->outputclr = (0x01 << gpio);
}
static int au1xxx_gpio1_direction_input(unsigned gpio)
{
gpio1->pininputen = (0x01 << gpio);
return 0;
}
static int au1xxx_gpio1_direction_output(unsigned gpio, int value)
{
gpio1->trioutclr = (0x01 & gpio);
return 0;
}
int au1xxx_gpio_get_value(unsigned gpio)
{
if (gpio >= AU1XXX_GPIO_BASE)
#if defined(CONFIG_SOC_AU1000)
return 0;
#else
return au1xxx_gpio2_read(gpio);
#endif
else
return au1xxx_gpio1_read(gpio);
}
EXPORT_SYMBOL(au1xxx_gpio_get_value);
void au1xxx_gpio_set_value(unsigned gpio, int value)
{
if (gpio >= AU1XXX_GPIO_BASE)
#if defined(CONFIG_SOC_AU1000)
;
#else
au1xxx_gpio2_write(gpio, value);
#endif
else
au1xxx_gpio1_write(gpio, value);
}
EXPORT_SYMBOL(au1xxx_gpio_set_value);
int au1xxx_gpio_direction_input(unsigned gpio)
{
if (gpio >= AU1XXX_GPIO_BASE)
#if defined(CONFIG_SOC_AU1000)
return -ENODEV;
#else
return au1xxx_gpio2_direction_input(gpio);
#endif
return au1xxx_gpio1_direction_input(gpio);
}
EXPORT_SYMBOL(au1xxx_gpio_direction_input);
int au1xxx_gpio_direction_output(unsigned gpio, int value)
{
if (gpio >= AU1XXX_GPIO_BASE)
#if defined(CONFIG_SOC_AU1000)
return -ENODEV;
#else
return au1xxx_gpio2_direction_output(gpio, value);
#endif
return au1xxx_gpio1_direction_output(gpio, value);
}
EXPORT_SYMBOL(au1xxx_gpio_direction_output);
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