diff options
Diffstat (limited to 'include/asm-arm/arch-davinci/gpio.h')
| -rw-r--r-- | include/asm-arm/arch-davinci/gpio.h | 159 |
1 files changed, 0 insertions, 159 deletions
diff --git a/include/asm-arm/arch-davinci/gpio.h b/include/asm-arm/arch-davinci/gpio.h deleted file mode 100644 index 54fda734649..00000000000 --- a/include/asm-arm/arch-davinci/gpio.h +++ /dev/null @@ -1,159 +0,0 @@ -/* - * TI DaVinci GPIO Support - * - * Copyright (c) 2006 David Brownell - * Copyright (c) 2007, MontaVista Software, Inc. <source@mvista.com> - * - * 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 __DAVINCI_GPIO_H -#define __DAVINCI_GPIO_H - -#include <linux/io.h> -#include <asm/arch/hardware.h> - -/* - * basic gpio routines - * - * board-specific init should be done by arch/.../.../board-XXX.c (maybe - * initializing banks together) rather than boot loaders; kexec() won't - * go through boot loaders. - * - * the gpio clock will be turned on when gpios are used, and you may also - * need to pay attention to PINMUX0 and PINMUX1 to be sure those pins are - * used as gpios, not with other peripherals. - * - * GPIOs are numbered 0..(DAVINCI_N_GPIO-1). For documentation, and maybe - * for later updates, code should write GPIO(N) or: - * - GPIOV18(N) for 1.8V pins, N in 0..53; same as GPIO(0)..GPIO(53) - * - GPIOV33(N) for 3.3V pins, N in 0..17; same as GPIO(54)..GPIO(70) - * - * For GPIO IRQs use gpio_to_irq(GPIO(N)) or gpio_to_irq(GPIOV33(N)) etc - * for now, that's != GPIO(N) - */ -#define GPIO(X) (X) /* 0 <= X <= 70 */ -#define GPIOV18(X) (X) /* 1.8V i/o; 0 <= X <= 53 */ -#define GPIOV33(X) ((X)+54) /* 3.3V i/o; 0 <= X <= 17 */ - -struct gpio_controller { - u32 dir; - u32 out_data; - u32 set_data; - u32 clr_data; - u32 in_data; - u32 set_rising; - u32 clr_rising; - u32 set_falling; - u32 clr_falling; - u32 intstat; -}; - -/* The __gpio_to_controller() and __gpio_mask() functions inline to constants - * with constant parameters; or in outlined code they execute at runtime. - * - * You'd access the controller directly when reading or writing more than - * one gpio value at a time, and to support wired logic where the value - * being driven by the cpu need not match the value read back. - * - * These are NOT part of the cross-platform GPIO interface - */ -static inline struct gpio_controller *__iomem -__gpio_to_controller(unsigned gpio) -{ - void *__iomem ptr; - - if (gpio < 32) - ptr = (void *__iomem)IO_ADDRESS(DAVINCI_GPIO_BASE + 0x10); - else if (gpio < 64) - ptr = (void *__iomem)IO_ADDRESS(DAVINCI_GPIO_BASE + 0x38); - else if (gpio < DAVINCI_N_GPIO) - ptr = (void *__iomem)IO_ADDRESS(DAVINCI_GPIO_BASE + 0x60); - else - ptr = NULL; - return ptr; -} - -static inline u32 __gpio_mask(unsigned gpio) -{ - return 1 << (gpio % 32); -} - -/* The get/set/clear functions will inline when called with constant - * parameters, for low-overhead bitbanging. Illegal constant parameters - * cause link-time errors. - * - * Otherwise, calls with variable parameters use outlined functions. - */ -extern int __error_inval_gpio(void); - -extern void __gpio_set(unsigned gpio, int value); -extern int __gpio_get(unsigned gpio); - -static inline void gpio_set_value(unsigned gpio, int value) -{ - if (__builtin_constant_p(value)) { - struct gpio_controller *__iomem g; - u32 mask; - - if (gpio >= DAVINCI_N_GPIO) - __error_inval_gpio(); - - g = __gpio_to_controller(gpio); - mask = __gpio_mask(gpio); - if (value) - __raw_writel(mask, &g->set_data); - else - __raw_writel(mask, &g->clr_data); - return; - } - - __gpio_set(gpio, value); -} - -/* Returns zero or nonzero; works for gpios configured as inputs OR - * as outputs. - * - * NOTE: changes in reported values are synchronized to the GPIO clock. - * This is most easily seen after calling gpio_set_value() and then immediatly - * gpio_get_value(), where the gpio_get_value() would return the old value - * until the GPIO clock ticks and the new value gets latched. - */ - -static inline int gpio_get_value(unsigned gpio) -{ - struct gpio_controller *__iomem g; - - if (!__builtin_constant_p(gpio)) - return __gpio_get(gpio); - - if (gpio >= DAVINCI_N_GPIO) - return __error_inval_gpio(); - - g = __gpio_to_controller(gpio); - return !!(__gpio_mask(gpio) & __raw_readl(&g->in_data)); -} - -/* powerup default direction is IN */ -extern int gpio_direction_input(unsigned gpio); -extern int gpio_direction_output(unsigned gpio, int value); - -#include <asm-generic/gpio.h> /* cansleep wrappers */ - -extern int gpio_request(unsigned gpio, const char *tag); -extern void gpio_free(unsigned gpio); - -static inline int gpio_to_irq(unsigned gpio) -{ - return DAVINCI_N_AINTC_IRQ + gpio; -} - -static inline int irq_to_gpio(unsigned irq) -{ - return irq - DAVINCI_N_AINTC_IRQ; -} - -#endif /* __DAVINCI_GPIO_H */ |