147 lines
3.8 KiB
C
147 lines
3.8 KiB
C
/*
|
|
* 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/module.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);
|