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/*
* Copyright (C) 2007-2009, OpenWrt.org, Florian Fainelli <florian@openwrt.org>
* GPIOLIB support for Alchemy chips.
*
* 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 block : GPIO1
* Au1100, Au15x0, Au12x0 have a second one : GPIO2
* Au1300 is totally different: 1 block with up to 128 GPIOs
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/property.h>
#include <linux/types.h>
#include <linux/gpio/driver.h>
#include <asm/mach-au1x00/gpio-au1000.h>
#include <asm/mach-au1x00/gpio-au1300.h>
static int gpio2_get(struct gpio_chip *chip, unsigned offset)
{
return !!alchemy_gpio2_get_value(offset + ALCHEMY_GPIO2_BASE);
}
static int gpio2_set(struct gpio_chip *chip, unsigned offset, int value)
{
alchemy_gpio2_set_value(offset + ALCHEMY_GPIO2_BASE, value);
return 0;
}
static int gpio2_direction_input(struct gpio_chip *chip, unsigned offset)
{
return alchemy_gpio2_direction_input(offset + ALCHEMY_GPIO2_BASE);
}
static int gpio2_direction_output(struct gpio_chip *chip, unsigned offset,
int value)
{
return alchemy_gpio2_direction_output(offset + ALCHEMY_GPIO2_BASE,
value);
}
static int gpio2_to_irq(struct gpio_chip *chip, unsigned offset)
{
return alchemy_gpio2_to_irq(offset + ALCHEMY_GPIO2_BASE);
}
static int gpio1_get(struct gpio_chip *chip, unsigned offset)
{
return !!alchemy_gpio1_get_value(offset + ALCHEMY_GPIO1_BASE);
}
static int gpio1_set(struct gpio_chip *chip,
unsigned offset, int value)
{
alchemy_gpio1_set_value(offset + ALCHEMY_GPIO1_BASE, value);
return 0;
}
static int gpio1_direction_input(struct gpio_chip *chip, unsigned offset)
{
return alchemy_gpio1_direction_input(offset + ALCHEMY_GPIO1_BASE);
}
static int gpio1_direction_output(struct gpio_chip *chip,
unsigned offset, int value)
{
return alchemy_gpio1_direction_output(offset + ALCHEMY_GPIO1_BASE,
value);
}
static int gpio1_to_irq(struct gpio_chip *chip, unsigned offset)
{
return alchemy_gpio1_to_irq(offset + ALCHEMY_GPIO1_BASE);
}
const struct software_node alchemy_gpio1_node = {
.name = "alchemy-gpio1",
};
const struct software_node alchemy_gpio2_node = {
.name = "alchemy-gpio2",
};
const struct software_node alchemy_gpic_node = {
.name = "alchemy-gpic",
};
static const struct software_node *alchemy_gpio_node_group[] = {
&alchemy_gpio1_node,
&alchemy_gpio2_node,
&alchemy_gpic_node,
NULL
};
static struct gpio_chip alchemy_gpio_chip[] = {
[0] = {
.label = "alchemy-gpio1",
.direction_input = gpio1_direction_input,
.direction_output = gpio1_direction_output,
.get = gpio1_get,
.set = gpio1_set,
.to_irq = gpio1_to_irq,
.base = ALCHEMY_GPIO1_BASE,
.ngpio = ALCHEMY_GPIO1_NUM,
},
[1] = {
.label = "alchemy-gpio2",
.direction_input = gpio2_direction_input,
.direction_output = gpio2_direction_output,
.get = gpio2_get,
.set = gpio2_set,
.to_irq = gpio2_to_irq,
.base = ALCHEMY_GPIO2_BASE,
.ngpio = ALCHEMY_GPIO2_NUM,
},
};
static int alchemy_gpic_get(struct gpio_chip *chip, unsigned int off)
{
return !!au1300_gpio_get_value(off + AU1300_GPIO_BASE);
}
static int alchemy_gpic_set(struct gpio_chip *chip, unsigned int off, int v)
{
au1300_gpio_set_value(off + AU1300_GPIO_BASE, v);
return 0;
}
static int alchemy_gpic_dir_input(struct gpio_chip *chip, unsigned int off)
{
return au1300_gpio_direction_input(off + AU1300_GPIO_BASE);
}
static int alchemy_gpic_dir_output(struct gpio_chip *chip, unsigned int off,
int v)
{
return au1300_gpio_direction_output(off + AU1300_GPIO_BASE, v);
}
static int alchemy_gpic_gpio_to_irq(struct gpio_chip *chip, unsigned int off)
{
return au1300_gpio_to_irq(off + AU1300_GPIO_BASE);
}
static struct gpio_chip au1300_gpiochip = {
.label = "alchemy-gpic",
.direction_input = alchemy_gpic_dir_input,
.direction_output = alchemy_gpic_dir_output,
.get = alchemy_gpic_get,
.set = alchemy_gpic_set,
.to_irq = alchemy_gpic_gpio_to_irq,
.base = AU1300_GPIO_BASE,
.ngpio = AU1300_GPIO_NUM,
};
/*
* Software nodes must be registered before board-specific code (that runs
* at arch_initcall level) attempts to use them as GPIO targets or as fwnodes
* for registered devices. We can not do registration in alchemy_gpiochip_init
* because it also runs as arch_initcall and runs after board-specific code
* because of the link order, and so we do it at postcore_initcall level.
*/
static int __init alchemy_gpio_nodes_init(void)
{
int ret;
ret = software_node_register_node_group(alchemy_gpio_node_group);
if (ret)
return ret;
alchemy_gpio_chip[0].fwnode = software_node_fwnode(&alchemy_gpio1_node);
alchemy_gpio_chip[1].fwnode = software_node_fwnode(&alchemy_gpio2_node);
au1300_gpiochip.fwnode = software_node_fwnode(&alchemy_gpic_node);
return 0;
}
postcore_initcall(alchemy_gpio_nodes_init);
static int __init alchemy_gpiochip_init(void)
{
int ret = 0;
switch (alchemy_get_cputype()) {
case ALCHEMY_CPU_AU1000:
ret = gpiochip_add_data(&alchemy_gpio_chip[0], NULL);
break;
case ALCHEMY_CPU_AU1500...ALCHEMY_CPU_AU1200:
ret = gpiochip_add_data(&alchemy_gpio_chip[0], NULL);
ret |= gpiochip_add_data(&alchemy_gpio_chip[1], NULL);
break;
case ALCHEMY_CPU_AU1300:
ret = gpiochip_add_data(&au1300_gpiochip, NULL);
break;
}
return ret;
}
arch_initcall(alchemy_gpiochip_init);
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