Pavel Pisa | b3e6a50 | 2007-05-12 14:31:17 +0100 | [diff] [blame] | 1 | #ifndef _IMX_GPIO_H |
| 2 | |
| 3 | #include <asm/arch/imx-regs.h> |
| 4 | |
| 5 | #define IMX_GPIO_ALLOC_MODE_NORMAL 0 |
| 6 | #define IMX_GPIO_ALLOC_MODE_NO_ALLOC 1 |
| 7 | #define IMX_GPIO_ALLOC_MODE_TRY_ALLOC 2 |
| 8 | #define IMX_GPIO_ALLOC_MODE_ALLOC_ONLY 4 |
| 9 | #define IMX_GPIO_ALLOC_MODE_RELEASE 8 |
| 10 | |
| 11 | extern int imx_gpio_request(unsigned gpio, const char *label); |
| 12 | |
| 13 | extern void imx_gpio_free(unsigned gpio); |
| 14 | |
| 15 | extern int imx_gpio_setup_multiple_pins(const int *pin_list, unsigned count, |
| 16 | int alloc_mode, const char *label); |
| 17 | |
| 18 | extern int imx_gpio_direction_input(unsigned gpio); |
| 19 | |
| 20 | extern int imx_gpio_direction_output(unsigned gpio, int value); |
| 21 | |
| 22 | extern void __imx_gpio_set_value(unsigned gpio, int value); |
| 23 | |
| 24 | static inline int imx_gpio_get_value(unsigned gpio) |
| 25 | { |
| 26 | return SSR(gpio >> GPIO_PORT_SHIFT) & (1 << (gpio & GPIO_PIN_MASK)); |
| 27 | } |
| 28 | |
| 29 | static inline void imx_gpio_set_value_inline(unsigned gpio, int value) |
| 30 | { |
| 31 | unsigned long flags; |
| 32 | |
| 33 | raw_local_irq_save(flags); |
| 34 | if(value) |
| 35 | DR(gpio >> GPIO_PORT_SHIFT) |= (1 << (gpio & GPIO_PIN_MASK)); |
| 36 | else |
| 37 | DR(gpio >> GPIO_PORT_SHIFT) &= ~(1 << (gpio & GPIO_PIN_MASK)); |
| 38 | raw_local_irq_restore(flags); |
| 39 | } |
| 40 | |
| 41 | static inline void imx_gpio_set_value(unsigned gpio, int value) |
| 42 | { |
| 43 | if(__builtin_constant_p(gpio)) |
| 44 | imx_gpio_set_value_inline(gpio, value); |
| 45 | else |
| 46 | __imx_gpio_set_value(gpio, value); |
| 47 | } |
| 48 | |
| 49 | extern int imx_gpio_to_irq(unsigned gpio); |
| 50 | |
| 51 | extern int imx_irq_to_gpio(unsigned irq); |
| 52 | |
| 53 | /*-------------------------------------------------------------------------*/ |
| 54 | |
| 55 | /* Wrappers for "new style" GPIO calls. These calls i.MX specific versions |
| 56 | * to allow future extension of GPIO logic. |
| 57 | */ |
| 58 | |
| 59 | static inline int gpio_request(unsigned gpio, const char *label) |
| 60 | { |
| 61 | return imx_gpio_request(gpio, label); |
| 62 | } |
| 63 | |
| 64 | static inline void gpio_free(unsigned gpio) |
| 65 | { |
| 66 | imx_gpio_free(gpio); |
| 67 | } |
| 68 | |
| 69 | static inline int gpio_direction_input(unsigned gpio) |
| 70 | { |
| 71 | return imx_gpio_direction_input(gpio); |
| 72 | } |
| 73 | |
| 74 | static inline int gpio_direction_output(unsigned gpio, int value) |
| 75 | { |
| 76 | return imx_gpio_direction_output(gpio, value); |
| 77 | } |
| 78 | |
| 79 | static inline int gpio_get_value(unsigned gpio) |
| 80 | { |
| 81 | return imx_gpio_get_value(gpio); |
| 82 | } |
| 83 | |
| 84 | static inline void gpio_set_value(unsigned gpio, int value) |
| 85 | { |
| 86 | imx_gpio_set_value(gpio, value); |
| 87 | } |
| 88 | |
| 89 | #include <asm-generic/gpio.h> /* cansleep wrappers */ |
| 90 | |
| 91 | static inline int gpio_to_irq(unsigned gpio) |
| 92 | { |
| 93 | return imx_gpio_to_irq(gpio); |
| 94 | } |
| 95 | |
| 96 | static inline int irq_to_gpio(unsigned irq) |
| 97 | { |
| 98 | return imx_irq_to_gpio(irq); |
| 99 | } |
| 100 | |
| 101 | |
| 102 | #endif |