1/* 2 * Copyright (C) 2007-2009, OpenWrt.org, Florian Fainelli <florian@openwrt.org> 3 * GPIOLIB support for Au1000, Au1500, Au1100, Au1550 and Au12x0. 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License as published by the 7 * Free Software Foundation; either version 2 of the License, or (at your 8 * option) any later version. 9 * 10 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 11 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 13 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 14 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 15 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 16 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 17 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 18 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 19 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 20 * 21 * You should have received a copy of the GNU General Public License along 22 * with this program; if not, write to the Free Software Foundation, Inc., 23 * 675 Mass Ave, Cambridge, MA 02139, USA. 24 * 25 * Notes : 26 * au1000 SoC have only one GPIO block : GPIO1 27 * Au1100, Au15x0, Au12x0 have a second one : GPIO2 28 */ 29 30#include <linux/kernel.h> 31#include <linux/module.h> 32#include <linux/types.h> 33#include <linux/platform_device.h> 34#include <linux/gpio.h> 35 36#include <asm/mach-au1x00/au1000.h> 37#include <asm/mach-au1x00/gpio.h> 38 39static int gpio2_get(struct gpio_chip *chip, unsigned offset) 40{ 41 return alchemy_gpio2_get_value(offset + ALCHEMY_GPIO2_BASE); 42} 43 44static void gpio2_set(struct gpio_chip *chip, unsigned offset, int value) 45{ 46 alchemy_gpio2_set_value(offset + ALCHEMY_GPIO2_BASE, value); 47} 48 49static int gpio2_direction_input(struct gpio_chip *chip, unsigned offset) 50{ 51 return alchemy_gpio2_direction_input(offset + ALCHEMY_GPIO2_BASE); 52} 53 54static int gpio2_direction_output(struct gpio_chip *chip, unsigned offset, 55 int value) 56{ 57 return alchemy_gpio2_direction_output(offset + ALCHEMY_GPIO2_BASE, 58 value); 59} 60 61static int gpio2_to_irq(struct gpio_chip *chip, unsigned offset) 62{ 63 return alchemy_gpio2_to_irq(offset + ALCHEMY_GPIO2_BASE); 64} 65 66 67static int gpio1_get(struct gpio_chip *chip, unsigned offset) 68{ 69 return alchemy_gpio1_get_value(offset + ALCHEMY_GPIO1_BASE); 70} 71 72static void gpio1_set(struct gpio_chip *chip, 73 unsigned offset, int value) 74{ 75 alchemy_gpio1_set_value(offset + ALCHEMY_GPIO1_BASE, value); 76} 77 78static int gpio1_direction_input(struct gpio_chip *chip, unsigned offset) 79{ 80 return alchemy_gpio1_direction_input(offset + ALCHEMY_GPIO1_BASE); 81} 82 83static int gpio1_direction_output(struct gpio_chip *chip, 84 unsigned offset, int value) 85{ 86 return alchemy_gpio1_direction_output(offset + ALCHEMY_GPIO1_BASE, 87 value); 88} 89 90static int gpio1_to_irq(struct gpio_chip *chip, unsigned offset) 91{ 92 return alchemy_gpio1_to_irq(offset + ALCHEMY_GPIO1_BASE); 93} 94 95struct gpio_chip alchemy_gpio_chip[] = { 96 [0] = { 97 .label = "alchemy-gpio1", 98 .direction_input = gpio1_direction_input, 99 .direction_output = gpio1_direction_output, 100 .get = gpio1_get, 101 .set = gpio1_set, 102 .to_irq = gpio1_to_irq, 103 .base = ALCHEMY_GPIO1_BASE, 104 .ngpio = ALCHEMY_GPIO1_NUM, 105 }, 106 [1] = { 107 .label = "alchemy-gpio2", 108 .direction_input = gpio2_direction_input, 109 .direction_output = gpio2_direction_output, 110 .get = gpio2_get, 111 .set = gpio2_set, 112 .to_irq = gpio2_to_irq, 113 .base = ALCHEMY_GPIO2_BASE, 114 .ngpio = ALCHEMY_GPIO2_NUM, 115 }, 116}; 117 118static int __init alchemy_gpiolib_init(void) 119{ 120 gpiochip_add(&alchemy_gpio_chip[0]); 121 if (alchemy_get_cputype() != ALCHEMY_CPU_AU1000) 122 gpiochip_add(&alchemy_gpio_chip[1]); 123 124 return 0; 125} 126arch_initcall(alchemy_gpiolib_init); 127