android_kernel_xiaomi_sm8350/arch/mips/au1000/common/gpio.c
Florian Fainelli 4ead16819b [MIPS] Add generic GPIO to Au1x00
This patch adds support for the generic GPIO API to Au1x00 boards. It requires
the generic GPIO patch for MIPS boards by Yoichi Yuasa. Now there is a MIPS
target using it, can you queue these patchset for 2.6.22 ? Thank you very
much in advance.

Signed-off-by: Florian Fainelli <florian.fainelli@telecomint.eu>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-07-10 17:32:56 +01:00

157 lines
3.9 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/autoconf.h>
#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)
;
#else
return au1xxx_gpio2_direction_input(gpio);
#endif
else
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)
;
#else
return au1xxx_gpio2_direction_output(gpio, value);
#endif
else
return au1xxx_gpio1_direction_output(gpio, value);
}
EXPORT_SYMBOL(au1xxx_gpio_direction_output);