/* * arch/arm/mach-pxa/include/mach/gpio.h * * PXA GPIO wrappers for arch-neutral GPIO calls * * Written by Philipp Zabel * * 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. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * */ #ifndef __ASM_ARCH_PXA_GPIO_H #define __ASM_ARCH_PXA_GPIO_H #include #include #define GPIO_REGS_VIRT (0x40E00000) #define BANK_OFF(n) (((n) < 3) ? (n) << 2 : 0x100 + (((n) - 3) << 2)) #define GPIO_REG(x) (*(volatile u32 *)(GPIO_REGS_VIRT + (x))) /* GPIO Pin Level Registers */ #define GPLR0 GPIO_REG(BANK_OFF(0) + 0x00) #define GPLR1 GPIO_REG(BANK_OFF(1) + 0x00) #define GPLR2 GPIO_REG(BANK_OFF(2) + 0x00) #define GPLR3 GPIO_REG(BANK_OFF(3) + 0x00) /* GPIO Pin Direction Registers */ #define GPDR0 GPIO_REG(BANK_OFF(0) + 0x0c) #define GPDR1 GPIO_REG(BANK_OFF(1) + 0x0c) #define GPDR2 GPIO_REG(BANK_OFF(2) + 0x0c) #define GPDR3 GPIO_REG(BANK_OFF(3) + 0x0c) /* GPIO Pin Output Set Registers */ #define GPSR0 GPIO_REG(BANK_OFF(0) + 0x18) #define GPSR1 GPIO_REG(BANK_OFF(1) + 0x18) #define GPSR2 GPIO_REG(BANK_OFF(2) + 0x18) #define GPSR3 GPIO_REG(BANK_OFF(3) + 0x18) /* GPIO Pin Output Clear Registers */ #define GPCR0 GPIO_REG(BANK_OFF(0) + 0x24) #define GPCR1 GPIO_REG(BANK_OFF(1) + 0x24) #define GPCR2 GPIO_REG(BANK_OFF(2) + 0x24) #define GPCR3 GPIO_REG(BANK_OFF(3) + 0x24) /* GPIO Rising Edge Detect Registers */ #define GRER0 GPIO_REG(BANK_OFF(0) + 0x30) #define GRER1 GPIO_REG(BANK_OFF(1) + 0x30) #define GRER2 GPIO_REG(BANK_OFF(2) + 0x30) #define GRER3 GPIO_REG(BANK_OFF(3) + 0x30) /* GPIO Falling Edge Detect Registers */ #define GFER0 GPIO_REG(BANK_OFF(0) + 0x3c) #define GFER1 GPIO_REG(BANK_OFF(1) + 0x3c) #define GFER2 GPIO_REG(BANK_OFF(2) + 0x3c) #define GFER3 GPIO_REG(BANK_OFF(3) + 0x3c) /* GPIO Edge Detect Status Registers */ #define GEDR0 GPIO_REG(BANK_OFF(0) + 0x48) #define GEDR1 GPIO_REG(BANK_OFF(1) + 0x48) #define GEDR2 GPIO_REG(BANK_OFF(2) + 0x48) #define GEDR3 GPIO_REG(BANK_OFF(3) + 0x48) /* GPIO Alternate Function Select Registers */ #define GAFR0_L GPIO_REG(0x0054) #define GAFR0_U GPIO_REG(0x0058) #define GAFR1_L GPIO_REG(0x005C) #define GAFR1_U GPIO_REG(0x0060) #define GAFR2_L GPIO_REG(0x0064) #define GAFR2_U GPIO_REG(0x0068) #define GAFR3_L GPIO_REG(0x006C) #define GAFR3_U GPIO_REG(0x0070) /* More handy macros. The argument is a literal GPIO number. */ #define GPIO_bit(x) (1 << ((x) & 0x1f)) #define GPLR(x) GPIO_REG(BANK_OFF((x) >> 5) + 0x00) #define GPDR(x) GPIO_REG(BANK_OFF((x) >> 5) + 0x0c) #define GPSR(x) GPIO_REG(BANK_OFF((x) >> 5) + 0x18) #define GPCR(x) GPIO_REG(BANK_OFF((x) >> 5) + 0x24) #define GRER(x) GPIO_REG(BANK_OFF((x) >> 5) + 0x30) #define GFER(x) GPIO_REG(BANK_OFF((x) >> 5) + 0x3c) #define GEDR(x) GPIO_REG(BANK_OFF((x) >> 5) + 0x48) #define GAFR(x) GPIO_REG(0x54 + (((x) & 0x70) >> 2)) #define NR_BUILTIN_GPIO 128 #define gpio_to_bank(gpio) ((gpio) >> 5) #ifdef CONFIG_CPU_PXA26x /* GPIO86/87/88/89 on PXA26x have their direction bits in GPDR2 inverted, * as well as their Alternate Function value being '1' for GPIO in GAFRx. */ static inline int __gpio_is_inverted(unsigned gpio) { return cpu_is_pxa25x() && gpio > 85; } #else static inline int __gpio_is_inverted(unsigned gpio) { return 0; } #endif /* * On PXA25x and PXA27x, GAFRx and GPDRx together decide the alternate * function of a GPIO, and GPDRx cannot be altered once configured. It * is attributed as "occupied" here (I know this terminology isn't * accurate, you are welcome to propose a better one :-) */ static inline int __gpio_is_occupied(unsigned gpio) { if (cpu_is_pxa27x() || cpu_is_pxa25x()) { int af = (GAFR(gpio) >> ((gpio & 0xf) * 2)) & 0x3; int dir = GPDR(gpio) & GPIO_bit(gpio); if (__gpio_is_inverted(gpio)) return af != 1 || dir == 0; else return af != 0 || dir != 0; } else return GPDR(gpio) & GPIO_bit(gpio); } #include #endif