1 /* 2 * Copyright (C) 2007-2009, OpenWrt.org, Florian Fainelli <florian@openwrt.org> 3 * GPIOLIB support for Alchemy chips. 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 * This file must ONLY be built when CONFIG_GPIOLIB=y and 27 * CONFIG_ALCHEMY_GPIO_INDIRECT=n, otherwise compilation will fail! 28 * au1000 SoC have only one GPIO block : GPIO1 29 * Au1100, Au15x0, Au12x0 have a second one : GPIO2 30 * Au1300 is totally different: 1 block with up to 128 GPIOs 31 */ 32 33 #include <linux/init.h> 34 #include <linux/kernel.h> 35 #include <linux/types.h> 36 #include <linux/gpio.h> 37 #include <asm/mach-au1x00/gpio-au1000.h> 38 #include <asm/mach-au1x00/gpio-au1300.h> 39 40 static int gpio2_get(struct gpio_chip *chip, unsigned offset) 41 { 42 return !!alchemy_gpio2_get_value(offset + ALCHEMY_GPIO2_BASE); 43 } 44 45 static void gpio2_set(struct gpio_chip *chip, unsigned offset, int value) 46 { 47 alchemy_gpio2_set_value(offset + ALCHEMY_GPIO2_BASE, value); 48 } 49 50 static int gpio2_direction_input(struct gpio_chip *chip, unsigned offset) 51 { 52 return alchemy_gpio2_direction_input(offset + ALCHEMY_GPIO2_BASE); 53 } 54 55 static int gpio2_direction_output(struct gpio_chip *chip, unsigned offset, 56 int value) 57 { 58 return alchemy_gpio2_direction_output(offset + ALCHEMY_GPIO2_BASE, 59 value); 60 } 61 62 static int gpio2_to_irq(struct gpio_chip *chip, unsigned offset) 63 { 64 return alchemy_gpio2_to_irq(offset + ALCHEMY_GPIO2_BASE); 65 } 66 67 68 static int gpio1_get(struct gpio_chip *chip, unsigned offset) 69 { 70 return !!alchemy_gpio1_get_value(offset + ALCHEMY_GPIO1_BASE); 71 } 72 73 static void gpio1_set(struct gpio_chip *chip, 74 unsigned offset, int value) 75 { 76 alchemy_gpio1_set_value(offset + ALCHEMY_GPIO1_BASE, value); 77 } 78 79 static int gpio1_direction_input(struct gpio_chip *chip, unsigned offset) 80 { 81 return alchemy_gpio1_direction_input(offset + ALCHEMY_GPIO1_BASE); 82 } 83 84 static int gpio1_direction_output(struct gpio_chip *chip, 85 unsigned offset, int value) 86 { 87 return alchemy_gpio1_direction_output(offset + ALCHEMY_GPIO1_BASE, 88 value); 89 } 90 91 static int gpio1_to_irq(struct gpio_chip *chip, unsigned offset) 92 { 93 return alchemy_gpio1_to_irq(offset + ALCHEMY_GPIO1_BASE); 94 } 95 96 struct gpio_chip alchemy_gpio_chip[] = { 97 [0] = { 98 .label = "alchemy-gpio1", 99 .direction_input = gpio1_direction_input, 100 .direction_output = gpio1_direction_output, 101 .get = gpio1_get, 102 .set = gpio1_set, 103 .to_irq = gpio1_to_irq, 104 .base = ALCHEMY_GPIO1_BASE, 105 .ngpio = ALCHEMY_GPIO1_NUM, 106 }, 107 [1] = { 108 .label = "alchemy-gpio2", 109 .direction_input = gpio2_direction_input, 110 .direction_output = gpio2_direction_output, 111 .get = gpio2_get, 112 .set = gpio2_set, 113 .to_irq = gpio2_to_irq, 114 .base = ALCHEMY_GPIO2_BASE, 115 .ngpio = ALCHEMY_GPIO2_NUM, 116 }, 117 }; 118 119 static int alchemy_gpic_get(struct gpio_chip *chip, unsigned int off) 120 { 121 return !!au1300_gpio_get_value(off + AU1300_GPIO_BASE); 122 } 123 124 static void alchemy_gpic_set(struct gpio_chip *chip, unsigned int off, int v) 125 { 126 au1300_gpio_set_value(off + AU1300_GPIO_BASE, v); 127 } 128 129 static int alchemy_gpic_dir_input(struct gpio_chip *chip, unsigned int off) 130 { 131 return au1300_gpio_direction_input(off + AU1300_GPIO_BASE); 132 } 133 134 static int alchemy_gpic_dir_output(struct gpio_chip *chip, unsigned int off, 135 int v) 136 { 137 return au1300_gpio_direction_output(off + AU1300_GPIO_BASE, v); 138 } 139 140 static int alchemy_gpic_gpio_to_irq(struct gpio_chip *chip, unsigned int off) 141 { 142 return au1300_gpio_to_irq(off + AU1300_GPIO_BASE); 143 } 144 145 static struct gpio_chip au1300_gpiochip = { 146 .label = "alchemy-gpic", 147 .direction_input = alchemy_gpic_dir_input, 148 .direction_output = alchemy_gpic_dir_output, 149 .get = alchemy_gpic_get, 150 .set = alchemy_gpic_set, 151 .to_irq = alchemy_gpic_gpio_to_irq, 152 .base = AU1300_GPIO_BASE, 153 .ngpio = AU1300_GPIO_NUM, 154 }; 155 156 static int __init alchemy_gpiochip_init(void) 157 { 158 int ret = 0; 159 160 switch (alchemy_get_cputype()) { 161 case ALCHEMY_CPU_AU1000: 162 ret = gpiochip_add_data(&alchemy_gpio_chip[0], NULL); 163 break; 164 case ALCHEMY_CPU_AU1500...ALCHEMY_CPU_AU1200: 165 ret = gpiochip_add_data(&alchemy_gpio_chip[0], NULL); 166 ret |= gpiochip_add_data(&alchemy_gpio_chip[1], NULL); 167 break; 168 case ALCHEMY_CPU_AU1300: 169 ret = gpiochip_add_data(&au1300_gpiochip, NULL); 170 break; 171 } 172 return ret; 173 } 174 arch_initcall(alchemy_gpiochip_init); 175