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gpiolib-au1000.c

/*
 *  Copyright (C) 2007-2009, OpenWrt.org, Florian Fainelli <florian@openwrt.org>
 *    GPIOLIB support for Au1000, Au1500, Au1100, Au1550 and Au12x0.
 *
 *  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
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>

#include <asm/mach-au1x00/au1000.h>
#include <asm/mach-au1x00/gpio.h>

#if !defined(CONFIG_SOC_AU1000)
static int gpio2_get(struct gpio_chip *chip, unsigned offset)
{
      return alchemy_gpio2_get_value(offset + ALCHEMY_GPIO2_BASE);
}

static void gpio2_set(struct gpio_chip *chip, unsigned offset, int value)
{
      alchemy_gpio2_set_value(offset + ALCHEMY_GPIO2_BASE, value);
}

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);
}
#endif /* !defined(CONFIG_SOC_AU1000) */

static int gpio1_get(struct gpio_chip *chip, unsigned offset)
{
      return alchemy_gpio1_get_value(offset + ALCHEMY_GPIO1_BASE);
}

static void gpio1_set(struct gpio_chip *chip,
                        unsigned offset, int value)
{
      alchemy_gpio1_set_value(offset + ALCHEMY_GPIO1_BASE, value);
}

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);
}

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,
      },
#if !defined(CONFIG_SOC_AU1000)
      [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,
      },
#endif
};

static int __init alchemy_gpiolib_init(void)
{
      gpiochip_add(&alchemy_gpio_chip[0]);
#if !defined(CONFIG_SOC_AU1000)
      gpiochip_add(&alchemy_gpio_chip[1]);
#endif

      return 0;
}
arch_initcall(alchemy_gpiolib_init);

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