| Florian Fainelli | 7ca5dc1 | 2009-06-24 11:12:57 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2007 Florian Fainelli <florian@openwrt.org> |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License as published by |
| 6 | * the Free Software Foundation; either version 2 of the License, or |
| 7 | * (at your option) any later version. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 17 | */ |
| 18 | |
| 19 | #ifndef __AR7_GPIO_H__ |
| 20 | #define __AR7_GPIO_H__ |
| 21 | |
| 22 | #include <asm/mach-ar7/ar7.h> |
| 23 | |
| 24 | #define AR7_GPIO_MAX 32 |
| 25 | |
| 26 | extern int gpio_request(unsigned gpio, const char *label); |
| 27 | extern void gpio_free(unsigned gpio); |
| 28 | |
| 29 | /* Common GPIO layer */ |
| 30 | static inline int gpio_get_value(unsigned gpio) |
| 31 | { |
| 32 | void __iomem *gpio_in = |
| 33 | (void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_INPUT); |
| 34 | |
| 35 | return readl(gpio_in) & (1 << gpio); |
| 36 | } |
| 37 | |
| 38 | static inline void gpio_set_value(unsigned gpio, int value) |
| 39 | { |
| 40 | void __iomem *gpio_out = |
| 41 | (void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_OUTPUT); |
| 42 | unsigned tmp; |
| 43 | |
| 44 | tmp = readl(gpio_out) & ~(1 << gpio); |
| 45 | if (value) |
| 46 | tmp |= 1 << gpio; |
| 47 | writel(tmp, gpio_out); |
| 48 | } |
| 49 | |
| 50 | static inline int gpio_direction_input(unsigned gpio) |
| 51 | { |
| 52 | void __iomem *gpio_dir = |
| 53 | (void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_DIR); |
| 54 | |
| 55 | if (gpio >= AR7_GPIO_MAX) |
| 56 | return -EINVAL; |
| 57 | |
| 58 | writel(readl(gpio_dir) | (1 << gpio), gpio_dir); |
| 59 | |
| 60 | return 0; |
| 61 | } |
| 62 | |
| 63 | static inline int gpio_direction_output(unsigned gpio, int value) |
| 64 | { |
| 65 | void __iomem *gpio_dir = |
| 66 | (void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_DIR); |
| 67 | |
| 68 | if (gpio >= AR7_GPIO_MAX) |
| 69 | return -EINVAL; |
| 70 | |
| 71 | gpio_set_value(gpio, value); |
| 72 | writel(readl(gpio_dir) & ~(1 << gpio), gpio_dir); |
| 73 | |
| 74 | return 0; |
| 75 | } |
| 76 | |
| 77 | static inline int gpio_to_irq(unsigned gpio) |
| 78 | { |
| 79 | return -EINVAL; |
| 80 | } |
| 81 | |
| 82 | static inline int irq_to_gpio(unsigned irq) |
| 83 | { |
| 84 | return -EINVAL; |
| 85 | } |
| 86 | |
| 87 | /* Board specific GPIO functions */ |
| 88 | static inline int ar7_gpio_enable(unsigned gpio) |
| 89 | { |
| 90 | void __iomem *gpio_en = |
| 91 | (void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_ENABLE); |
| 92 | |
| 93 | writel(readl(gpio_en) | (1 << gpio), gpio_en); |
| 94 | |
| 95 | return 0; |
| 96 | } |
| 97 | |
| 98 | static inline int ar7_gpio_disable(unsigned gpio) |
| 99 | { |
| 100 | void __iomem *gpio_en = |
| 101 | (void __iomem *)KSEG1ADDR(AR7_REGS_GPIO + AR7_GPIO_ENABLE); |
| 102 | |
| 103 | writel(readl(gpio_en) & ~(1 << gpio), gpio_en); |
| 104 | |
| 105 | return 0; |
| 106 | } |
| 107 | |
| 108 | #include <asm-generic/gpio.h> |
| 109 | |
| 110 | #endif |