diff options
Diffstat (limited to 'include/asm-arm/arch-at91/gpio.h')
| -rw-r--r-- | include/asm-arm/arch-at91/gpio.h | 366 |
1 files changed, 366 insertions, 0 deletions
diff --git a/include/asm-arm/arch-at91/gpio.h b/include/asm-arm/arch-at91/gpio.h new file mode 100644 index 0000000..c4d7b97 --- /dev/null +++ b/include/asm-arm/arch-at91/gpio.h @@ -0,0 +1,366 @@ +/* + * [origin: Linux kernel include/asm-arm/arch-at91/gpio.h] + * + * Copyright (C) 2005 HP Labs + * + * 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. + * + */ + +#ifndef __ASM_ARCH_AT91_GPIO_H +#define __ASM_ARCH_AT91_GPIO_H + +#include <asm/io.h> +#include <asm/errno.h> +#include <asm/arch/at91_pio.h> + +#define PIN_BASE 32 + +#define MAX_GPIO_BANKS 5 + +/* these pin numbers double as IRQ numbers, like AT91xxx_ID_* values */ + +#define AT91_PIN_PA0 (PIN_BASE + 0x00 + 0) +#define AT91_PIN_PA1 (PIN_BASE + 0x00 + 1) +#define AT91_PIN_PA2 (PIN_BASE + 0x00 + 2) +#define AT91_PIN_PA3 (PIN_BASE + 0x00 + 3) +#define AT91_PIN_PA4 (PIN_BASE + 0x00 + 4) +#define AT91_PIN_PA5 (PIN_BASE + 0x00 + 5) +#define AT91_PIN_PA6 (PIN_BASE + 0x00 + 6) +#define AT91_PIN_PA7 (PIN_BASE + 0x00 + 7) +#define AT91_PIN_PA8 (PIN_BASE + 0x00 + 8) +#define AT91_PIN_PA9 (PIN_BASE + 0x00 + 9) +#define AT91_PIN_PA10 (PIN_BASE + 0x00 + 10) +#define AT91_PIN_PA11 (PIN_BASE + 0x00 + 11) +#define AT91_PIN_PA12 (PIN_BASE + 0x00 + 12) +#define AT91_PIN_PA13 (PIN_BASE + 0x00 + 13) +#define AT91_PIN_PA14 (PIN_BASE + 0x00 + 14) +#define AT91_PIN_PA15 (PIN_BASE + 0x00 + 15) +#define AT91_PIN_PA16 (PIN_BASE + 0x00 + 16) +#define AT91_PIN_PA17 (PIN_BASE + 0x00 + 17) +#define AT91_PIN_PA18 (PIN_BASE + 0x00 + 18) +#define AT91_PIN_PA19 (PIN_BASE + 0x00 + 19) +#define AT91_PIN_PA20 (PIN_BASE + 0x00 + 20) +#define AT91_PIN_PA21 (PIN_BASE + 0x00 + 21) +#define AT91_PIN_PA22 (PIN_BASE + 0x00 + 22) +#define AT91_PIN_PA23 (PIN_BASE + 0x00 + 23) +#define AT91_PIN_PA24 (PIN_BASE + 0x00 + 24) +#define AT91_PIN_PA25 (PIN_BASE + 0x00 + 25) +#define AT91_PIN_PA26 (PIN_BASE + 0x00 + 26) +#define AT91_PIN_PA27 (PIN_BASE + 0x00 + 27) +#define AT91_PIN_PA28 (PIN_BASE + 0x00 + 28) +#define AT91_PIN_PA29 (PIN_BASE + 0x00 + 29) +#define AT91_PIN_PA30 (PIN_BASE + 0x00 + 30) +#define AT91_PIN_PA31 (PIN_BASE + 0x00 + 31) + +#define AT91_PIN_PB0 (PIN_BASE + 0x20 + 0) +#define AT91_PIN_PB1 (PIN_BASE + 0x20 + 1) +#define AT91_PIN_PB2 (PIN_BASE + 0x20 + 2) +#define AT91_PIN_PB3 (PIN_BASE + 0x20 + 3) +#define AT91_PIN_PB4 (PIN_BASE + 0x20 + 4) +#define AT91_PIN_PB5 (PIN_BASE + 0x20 + 5) +#define AT91_PIN_PB6 (PIN_BASE + 0x20 + 6) +#define AT91_PIN_PB7 (PIN_BASE + 0x20 + 7) +#define AT91_PIN_PB8 (PIN_BASE + 0x20 + 8) +#define AT91_PIN_PB9 (PIN_BASE + 0x20 + 9) +#define AT91_PIN_PB10 (PIN_BASE + 0x20 + 10) +#define AT91_PIN_PB11 (PIN_BASE + 0x20 + 11) +#define AT91_PIN_PB12 (PIN_BASE + 0x20 + 12) +#define AT91_PIN_PB13 (PIN_BASE + 0x20 + 13) +#define AT91_PIN_PB14 (PIN_BASE + 0x20 + 14) +#define AT91_PIN_PB15 (PIN_BASE + 0x20 + 15) +#define AT91_PIN_PB16 (PIN_BASE + 0x20 + 16) +#define AT91_PIN_PB17 (PIN_BASE + 0x20 + 17) +#define AT91_PIN_PB18 (PIN_BASE + 0x20 + 18) +#define AT91_PIN_PB19 (PIN_BASE + 0x20 + 19) +#define AT91_PIN_PB20 (PIN_BASE + 0x20 + 20) +#define AT91_PIN_PB21 (PIN_BASE + 0x20 + 21) +#define AT91_PIN_PB22 (PIN_BASE + 0x20 + 22) +#define AT91_PIN_PB23 (PIN_BASE + 0x20 + 23) +#define AT91_PIN_PB24 (PIN_BASE + 0x20 + 24) +#define AT91_PIN_PB25 (PIN_BASE + 0x20 + 25) +#define AT91_PIN_PB26 (PIN_BASE + 0x20 + 26) +#define AT91_PIN_PB27 (PIN_BASE + 0x20 + 27) +#define AT91_PIN_PB28 (PIN_BASE + 0x20 + 28) +#define AT91_PIN_PB29 (PIN_BASE + 0x20 + 29) +#define AT91_PIN_PB30 (PIN_BASE + 0x20 + 30) +#define AT91_PIN_PB31 (PIN_BASE + 0x20 + 31) + +#define AT91_PIN_PC0 (PIN_BASE + 0x40 + 0) +#define AT91_PIN_PC1 (PIN_BASE + 0x40 + 1) +#define AT91_PIN_PC2 (PIN_BASE + 0x40 + 2) +#define AT91_PIN_PC3 (PIN_BASE + 0x40 + 3) +#define AT91_PIN_PC4 (PIN_BASE + 0x40 + 4) +#define AT91_PIN_PC5 (PIN_BASE + 0x40 + 5) +#define AT91_PIN_PC6 (PIN_BASE + 0x40 + 6) +#define AT91_PIN_PC7 (PIN_BASE + 0x40 + 7) +#define AT91_PIN_PC8 (PIN_BASE + 0x40 + 8) +#define AT91_PIN_PC9 (PIN_BASE + 0x40 + 9) +#define AT91_PIN_PC10 (PIN_BASE + 0x40 + 10) +#define AT91_PIN_PC11 (PIN_BASE + 0x40 + 11) +#define AT91_PIN_PC12 (PIN_BASE + 0x40 + 12) +#define AT91_PIN_PC13 (PIN_BASE + 0x40 + 13) +#define AT91_PIN_PC14 (PIN_BASE + 0x40 + 14) +#define AT91_PIN_PC15 (PIN_BASE + 0x40 + 15) +#define AT91_PIN_PC16 (PIN_BASE + 0x40 + 16) +#define AT91_PIN_PC17 (PIN_BASE + 0x40 + 17) +#define AT91_PIN_PC18 (PIN_BASE + 0x40 + 18) +#define AT91_PIN_PC19 (PIN_BASE + 0x40 + 19) +#define AT91_PIN_PC20 (PIN_BASE + 0x40 + 20) +#define AT91_PIN_PC21 (PIN_BASE + 0x40 + 21) +#define AT91_PIN_PC22 (PIN_BASE + 0x40 + 22) +#define AT91_PIN_PC23 (PIN_BASE + 0x40 + 23) +#define AT91_PIN_PC24 (PIN_BASE + 0x40 + 24) +#define AT91_PIN_PC25 (PIN_BASE + 0x40 + 25) +#define AT91_PIN_PC26 (PIN_BASE + 0x40 + 26) +#define AT91_PIN_PC27 (PIN_BASE + 0x40 + 27) +#define AT91_PIN_PC28 (PIN_BASE + 0x40 + 28) +#define AT91_PIN_PC29 (PIN_BASE + 0x40 + 29) +#define AT91_PIN_PC30 (PIN_BASE + 0x40 + 30) +#define AT91_PIN_PC31 (PIN_BASE + 0x40 + 31) + +#define AT91_PIN_PD0 (PIN_BASE + 0x60 + 0) +#define AT91_PIN_PD1 (PIN_BASE + 0x60 + 1) +#define AT91_PIN_PD2 (PIN_BASE + 0x60 + 2) +#define AT91_PIN_PD3 (PIN_BASE + 0x60 + 3) +#define AT91_PIN_PD4 (PIN_BASE + 0x60 + 4) +#define AT91_PIN_PD5 (PIN_BASE + 0x60 + 5) +#define AT91_PIN_PD6 (PIN_BASE + 0x60 + 6) +#define AT91_PIN_PD7 (PIN_BASE + 0x60 + 7) +#define AT91_PIN_PD8 (PIN_BASE + 0x60 + 8) +#define AT91_PIN_PD9 (PIN_BASE + 0x60 + 9) +#define AT91_PIN_PD10 (PIN_BASE + 0x60 + 10) +#define AT91_PIN_PD11 (PIN_BASE + 0x60 + 11) +#define AT91_PIN_PD12 (PIN_BASE + 0x60 + 12) +#define AT91_PIN_PD13 (PIN_BASE + 0x60 + 13) +#define AT91_PIN_PD14 (PIN_BASE + 0x60 + 14) +#define AT91_PIN_PD15 (PIN_BASE + 0x60 + 15) +#define AT91_PIN_PD16 (PIN_BASE + 0x60 + 16) +#define AT91_PIN_PD17 (PIN_BASE + 0x60 + 17) +#define AT91_PIN_PD18 (PIN_BASE + 0x60 + 18) +#define AT91_PIN_PD19 (PIN_BASE + 0x60 + 19) +#define AT91_PIN_PD20 (PIN_BASE + 0x60 + 20) +#define AT91_PIN_PD21 (PIN_BASE + 0x60 + 21) +#define AT91_PIN_PD22 (PIN_BASE + 0x60 + 22) +#define AT91_PIN_PD23 (PIN_BASE + 0x60 + 23) +#define AT91_PIN_PD24 (PIN_BASE + 0x60 + 24) +#define AT91_PIN_PD25 (PIN_BASE + 0x60 + 25) +#define AT91_PIN_PD26 (PIN_BASE + 0x60 + 26) +#define AT91_PIN_PD27 (PIN_BASE + 0x60 + 27) +#define AT91_PIN_PD28 (PIN_BASE + 0x60 + 28) +#define AT91_PIN_PD29 (PIN_BASE + 0x60 + 29) +#define AT91_PIN_PD30 (PIN_BASE + 0x60 + 30) +#define AT91_PIN_PD31 (PIN_BASE + 0x60 + 31) + +#define AT91_PIN_PE0 (PIN_BASE + 0x80 + 0) +#define AT91_PIN_PE1 (PIN_BASE + 0x80 + 1) +#define AT91_PIN_PE2 (PIN_BASE + 0x80 + 2) +#define AT91_PIN_PE3 (PIN_BASE + 0x80 + 3) +#define AT91_PIN_PE4 (PIN_BASE + 0x80 + 4) +#define AT91_PIN_PE5 (PIN_BASE + 0x80 + 5) +#define AT91_PIN_PE6 (PIN_BASE + 0x80 + 6) +#define AT91_PIN_PE7 (PIN_BASE + 0x80 + 7) +#define AT91_PIN_PE8 (PIN_BASE + 0x80 + 8) +#define AT91_PIN_PE9 (PIN_BASE + 0x80 + 9) +#define AT91_PIN_PE10 (PIN_BASE + 0x80 + 10) +#define AT91_PIN_PE11 (PIN_BASE + 0x80 + 11) +#define AT91_PIN_PE12 (PIN_BASE + 0x80 + 12) +#define AT91_PIN_PE13 (PIN_BASE + 0x80 + 13) +#define AT91_PIN_PE14 (PIN_BASE + 0x80 + 14) +#define AT91_PIN_PE15 (PIN_BASE + 0x80 + 15) +#define AT91_PIN_PE16 (PIN_BASE + 0x80 + 16) +#define AT91_PIN_PE17 (PIN_BASE + 0x80 + 17) +#define AT91_PIN_PE18 (PIN_BASE + 0x80 + 18) +#define AT91_PIN_PE19 (PIN_BASE + 0x80 + 19) +#define AT91_PIN_PE20 (PIN_BASE + 0x80 + 20) +#define AT91_PIN_PE21 (PIN_BASE + 0x80 + 21) +#define AT91_PIN_PE22 (PIN_BASE + 0x80 + 22) +#define AT91_PIN_PE23 (PIN_BASE + 0x80 + 23) +#define AT91_PIN_PE24 (PIN_BASE + 0x80 + 24) +#define AT91_PIN_PE25 (PIN_BASE + 0x80 + 25) +#define AT91_PIN_PE26 (PIN_BASE + 0x80 + 26) +#define AT91_PIN_PE27 (PIN_BASE + 0x80 + 27) +#define AT91_PIN_PE28 (PIN_BASE + 0x80 + 28) +#define AT91_PIN_PE29 (PIN_BASE + 0x80 + 29) +#define AT91_PIN_PE30 (PIN_BASE + 0x80 + 30) +#define AT91_PIN_PE31 (PIN_BASE + 0x80 + 31) + +static unsigned long at91_pios[] = { + AT91_PIOA, + AT91_PIOB, + AT91_PIOC, +#ifdef AT91_PIOD + AT91_PIOD, +#ifdef AT91_PIOE + AT91_PIOE +#endif +#endif +}; + +static inline void *pin_to_controller(unsigned pin) +{ + pin -= PIN_BASE; + pin /= 32; + return (void *)(AT91_BASE_SYS + at91_pios[pin]); +} + +static inline unsigned pin_to_mask(unsigned pin) +{ + pin -= PIN_BASE; + return 1 << (pin % 32); +} + +/* + * mux the pin to the "GPIO" peripheral role. + */ +static inline int at91_set_GPIO_periph(unsigned pin, int use_pullup) +{ + void *pio = pin_to_controller(pin); + unsigned mask = pin_to_mask(pin); + + __raw_writel(mask, pio + PIO_IDR); + __raw_writel(mask, pio + (use_pullup ? PIO_PUER : PIO_PUDR)); + __raw_writel(mask, pio + PIO_PER); + return 0; +} + +/* + * mux the pin to the "A" internal peripheral role. + */ +static inline int at91_set_A_periph(unsigned pin, int use_pullup) +{ + void *pio = pin_to_controller(pin); + unsigned mask = pin_to_mask(pin); + + __raw_writel(mask, pio + PIO_IDR); + __raw_writel(mask, pio + (use_pullup ? PIO_PUER : PIO_PUDR)); + __raw_writel(mask, pio + PIO_ASR); + __raw_writel(mask, pio + PIO_PDR); + return 0; +} + +/* + * mux the pin to the "B" internal peripheral role. + */ +static inline int at91_set_B_periph(unsigned pin, int use_pullup) +{ + void *pio = pin_to_controller(pin); + unsigned mask = pin_to_mask(pin); + + __raw_writel(mask, pio + PIO_IDR); + __raw_writel(mask, pio + (use_pullup ? PIO_PUER : PIO_PUDR)); + __raw_writel(mask, pio + PIO_BSR); + __raw_writel(mask, pio + PIO_PDR); + return 0; +} + +/* + * mux the pin to the gpio controller (instead of "A" or "B" peripheral), and + * configure it for an input. + */ +static inline int at91_set_gpio_input(unsigned pin, int use_pullup) +{ + void *pio = pin_to_controller(pin); + unsigned mask = pin_to_mask(pin); + + __raw_writel(mask, pio + PIO_IDR); + __raw_writel(mask, pio + (use_pullup ? PIO_PUER : PIO_PUDR)); + __raw_writel(mask, pio + PIO_ODR); + __raw_writel(mask, pio + PIO_PER); + return 0; +} + +/* + * mux the pin to the gpio controller (instead of "A" or "B" peripheral), + * and configure it for an output. + */ +static inline int at91_set_gpio_output(unsigned pin, int value) +{ + void *pio = pin_to_controller(pin); + unsigned mask = pin_to_mask(pin); + + __raw_writel(mask, pio + PIO_IDR); + __raw_writel(mask, pio + PIO_PUDR); + __raw_writel(mask, pio + (value ? PIO_SODR : PIO_CODR)); + __raw_writel(mask, pio + PIO_OER); + __raw_writel(mask, pio + PIO_PER); + return 0; +} + +/* + * enable/disable the glitch filter; mostly used with IRQ handling. + */ +static inline int at91_set_deglitch(unsigned pin, int is_on) +{ + void *pio = pin_to_controller(pin); + unsigned mask = pin_to_mask(pin); + + __raw_writel(mask, pio + (is_on ? PIO_IFER : PIO_IFDR)); + return 0; +} + +/* + * enable/disable the multi-driver; This is only valid for output and + * allows the output pin to run as an open collector output. + */ +static inline int at91_set_multi_drive(unsigned pin, int is_on) +{ + void *pio = pin_to_controller(pin); + unsigned mask = pin_to_mask(pin); + + __raw_writel(mask, pio + (is_on ? PIO_MDER : PIO_MDDR)); + return 0; +} + +static inline int gpio_direction_input(unsigned pin) +{ + void *pio = pin_to_controller(pin); + unsigned mask = pin_to_mask(pin); + + if (!(__raw_readl(pio + PIO_PSR) & mask)) + return -EINVAL; + __raw_writel(mask, pio + PIO_ODR); + return 0; +} + +static inline int gpio_direction_output(unsigned pin, int value) +{ + void *pio = pin_to_controller(pin); + unsigned mask = pin_to_mask(pin); + + if (!(__raw_readl(pio + PIO_PSR) & mask)) + return -EINVAL; + __raw_writel(mask, pio + (value ? PIO_SODR : PIO_CODR)); + __raw_writel(mask, pio + PIO_OER); + return 0; +} + +/* + * assuming the pin is muxed as a gpio output, set its value. + */ +static inline int at91_set_gpio_value(unsigned pin, int value) +{ + void *pio = pin_to_controller(pin); + unsigned mask = pin_to_mask(pin); + + __raw_writel(mask, pio + (value ? PIO_SODR : PIO_CODR)); + return 0; +} + +/* + * read the pin's value (works even if it's not muxed as a gpio). + */ +static inline int at91_get_gpio_value(unsigned pin) +{ + void *pio = pin_to_controller(pin); + unsigned mask = pin_to_mask(pin); + u32 pdsr; + + pdsr = __raw_readl(pio + PIO_PDSR); + return (pdsr & mask) != 0; +} + +#endif |