forked from Minki/linux
3c729f1ecd
This teaches OMAP how to implement the cross-platform GPIO interfaces. [akpm@osdl.org: cleanups] Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
146 lines
4.0 KiB
C
146 lines
4.0 KiB
C
/*
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* linux/include/asm-arm/arch-omap/gpio.h
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*
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* OMAP GPIO handling defines and functions
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*
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* Copyright (C) 2003-2005 Nokia Corporation
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*
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* Written by Juha Yrjölä <juha.yrjola@nokia.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#ifndef __ASM_ARCH_OMAP_GPIO_H
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#define __ASM_ARCH_OMAP_GPIO_H
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#include <asm/hardware.h>
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#include <asm/arch/irqs.h>
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#include <asm/io.h>
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#define OMAP_MPUIO_BASE (void __iomem *)0xfffb5000
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#ifdef CONFIG_ARCH_OMAP730
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#define OMAP_MPUIO_INPUT_LATCH 0x00
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#define OMAP_MPUIO_OUTPUT 0x02
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#define OMAP_MPUIO_IO_CNTL 0x04
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#define OMAP_MPUIO_KBR_LATCH 0x08
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#define OMAP_MPUIO_KBC 0x0a
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#define OMAP_MPUIO_GPIO_EVENT_MODE 0x0c
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#define OMAP_MPUIO_GPIO_INT_EDGE 0x0e
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#define OMAP_MPUIO_KBD_INT 0x10
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#define OMAP_MPUIO_GPIO_INT 0x12
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#define OMAP_MPUIO_KBD_MASKIT 0x14
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#define OMAP_MPUIO_GPIO_MASKIT 0x16
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#define OMAP_MPUIO_GPIO_DEBOUNCING 0x18
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#define OMAP_MPUIO_LATCH 0x1a
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#else
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#define OMAP_MPUIO_INPUT_LATCH 0x00
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#define OMAP_MPUIO_OUTPUT 0x04
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#define OMAP_MPUIO_IO_CNTL 0x08
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#define OMAP_MPUIO_KBR_LATCH 0x10
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#define OMAP_MPUIO_KBC 0x14
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#define OMAP_MPUIO_GPIO_EVENT_MODE 0x18
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#define OMAP_MPUIO_GPIO_INT_EDGE 0x1c
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#define OMAP_MPUIO_KBD_INT 0x20
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#define OMAP_MPUIO_GPIO_INT 0x24
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#define OMAP_MPUIO_KBD_MASKIT 0x28
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#define OMAP_MPUIO_GPIO_MASKIT 0x2c
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#define OMAP_MPUIO_GPIO_DEBOUNCING 0x30
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#define OMAP_MPUIO_LATCH 0x34
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#endif
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#define OMAP_MPUIO(nr) (OMAP_MAX_GPIO_LINES + (nr))
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#define OMAP_GPIO_IS_MPUIO(nr) ((nr) >= OMAP_MAX_GPIO_LINES)
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#define OMAP_GPIO_IRQ(nr) (OMAP_GPIO_IS_MPUIO(nr) ? \
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IH_MPUIO_BASE + ((nr) & 0x0f) : \
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IH_GPIO_BASE + (nr))
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extern int omap_gpio_init(void); /* Call from board init only */
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extern int omap_request_gpio(int gpio);
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extern void omap_free_gpio(int gpio);
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extern void omap_set_gpio_direction(int gpio, int is_input);
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extern void omap_set_gpio_dataout(int gpio, int enable);
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extern int omap_get_gpio_datain(int gpio);
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/*-------------------------------------------------------------------------*/
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/* wrappers for "new style" GPIO calls. the old OMAP-specfic ones should
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* eventually be removed (along with this errno.h inclusion), and maybe
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* gpios should put MPUIOs last too.
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*/
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#include <asm/errno.h>
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static inline int gpio_request(unsigned gpio, const char *label)
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{
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return omap_request_gpio(gpio);
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}
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static inline void gpio_free(unsigned gpio)
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{
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omap_free_gpio(gpio);
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}
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static inline int __gpio_set_direction(unsigned gpio, int is_input)
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{
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if (cpu_class_is_omap2()) {
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if (gpio > OMAP_MAX_GPIO_LINES)
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return -EINVAL;
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} else {
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if (gpio > (OMAP_MAX_GPIO_LINES + 16 /* MPUIO */))
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return -EINVAL;
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}
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omap_set_gpio_direction(gpio, is_input);
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return 0;
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}
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static inline int gpio_direction_input(unsigned gpio)
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{
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return __gpio_set_direction(gpio, 1);
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}
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static inline int gpio_direction_output(unsigned gpio)
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{
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return __gpio_set_direction(gpio, 0);
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}
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static inline int gpio_get_value(unsigned gpio)
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{
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return omap_get_gpio_datain(gpio);
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}
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static inline void gpio_set_value(unsigned gpio, int value)
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{
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omap_set_gpio_dataout(gpio, value);
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}
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#include <asm-generic/gpio.h> /* cansleep wrappers */
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static inline int gpio_to_irq(unsigned gpio)
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{
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return OMAP_GPIO_IRQ(gpio);
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}
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static inline int irq_to_gpio(unsigned irq)
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{
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if (cpu_class_is_omap1() && (irq < (IH_MPUIO_BASE + 16)))
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return (irq - IH_MPUIO_BASE) + OMAP_MAX_GPIO_LINES;
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return irq - IH_GPIO_BASE;
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}
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#endif
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