diff options
Diffstat (limited to 'arch/mips/alchemy/common/gpiolib.c')
| -rw-r--r-- | arch/mips/alchemy/common/gpiolib.c | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/arch/mips/alchemy/common/gpiolib.c b/arch/mips/alchemy/common/gpiolib.c new file mode 100644 index 000000000..1b16daaa8 --- /dev/null +++ b/arch/mips/alchemy/common/gpiolib.c @@ -0,0 +1,172 @@ +/* + * 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/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 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); +} + + +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, + }, + [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 void alchemy_gpic_set(struct gpio_chip *chip, unsigned int off, int v) +{ + au1300_gpio_set_value(off + AU1300_GPIO_BASE, v); +} + +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, +}; + +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); |