arch/arm/plat-omap/include/mach/gpio.h

   1 /*
   2  * arch/arm/plat-omap/include/mach/gpio.h
   3  *
   4  * OMAP GPIO handling defines and functions
   5  *
   6  * Copyright (C) 2003-2005 Nokia Corporation
   7  *
   8  * Written by Juha Yrjölä <juha.yrjola@nokia.com>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  23  *
  24  */
  25
  26 #ifndef __ASM_ARCH_OMAP_GPIO_H
  27 #define __ASM_ARCH_OMAP_GPIO_H
  28
  29 #include <linux/io.h>
  30 #include <mach/irqs.h>
  31
  32 #define OMAP_MPUIO_BASE                 0xfffb5000
  33
  34 #ifdef CONFIG_ARCH_OMAP730
  35 #define OMAP_MPUIO_INPUT_LATCH          0x00
  36 #define OMAP_MPUIO_OUTPUT               0x02
  37 #define OMAP_MPUIO_IO_CNTL              0x04
  38 #define OMAP_MPUIO_KBR_LATCH            0x08
  39 #define OMAP_MPUIO_KBC                  0x0a
  40 #define OMAP_MPUIO_GPIO_EVENT_MODE      0x0c
  41 #define OMAP_MPUIO_GPIO_INT_EDGE        0x0e
  42 #define OMAP_MPUIO_KBD_INT              0x10
  43 #define OMAP_MPUIO_GPIO_INT             0x12
  44 #define OMAP_MPUIO_KBD_MASKIT           0x14
  45 #define OMAP_MPUIO_GPIO_MASKIT          0x16
  46 #define OMAP_MPUIO_GPIO_DEBOUNCING      0x18
  47 #define OMAP_MPUIO_LATCH                0x1a
  48 #else
  49 #define OMAP_MPUIO_INPUT_LATCH          0x00
  50 #define OMAP_MPUIO_OUTPUT               0x04
  51 #define OMAP_MPUIO_IO_CNTL              0x08
  52 #define OMAP_MPUIO_KBR_LATCH            0x10
  53 #define OMAP_MPUIO_KBC                  0x14
  54 #define OMAP_MPUIO_GPIO_EVENT_MODE      0x18
  55 #define OMAP_MPUIO_GPIO_INT_EDGE        0x1c
  56 #define OMAP_MPUIO_KBD_INT              0x20
  57 #define OMAP_MPUIO_GPIO_INT             0x24
  58 #define OMAP_MPUIO_KBD_MASKIT           0x28
  59 #define OMAP_MPUIO_GPIO_MASKIT          0x2c
  60 #define OMAP_MPUIO_GPIO_DEBOUNCING      0x30
  61 #define OMAP_MPUIO_LATCH                0x34
  62 #endif
  63
  64 #define OMAP34XX_NR_GPIOS               6
  65
  66 #define OMAP_MPUIO(nr)          (OMAP_MAX_GPIO_LINES + (nr))
  67 #define OMAP_GPIO_IS_MPUIO(nr)  ((nr) >= OMAP_MAX_GPIO_LINES)
  68
  69 #define OMAP_GPIO_IRQ(nr)       (OMAP_GPIO_IS_MPUIO(nr) ? \
  70                                  IH_MPUIO_BASE + ((nr) & 0x0f) : \
  71                                  IH_GPIO_BASE + (nr))
  72
  73 extern int omap_gpio_init(void);        /* Call from board init only */
  74 extern void omap2_gpio_prepare_for_retention(void);
  75 extern void omap2_gpio_resume_after_retention(void);
  76 extern void omap_set_gpio_debounce(int gpio, int enable);
  77 extern void omap_set_gpio_debounce_time(int gpio, int enable);
  78
  79 /*-------------------------------------------------------------------------*/
  80
  81 /* Wrappers for "new style" GPIO calls, using the new infrastructure
  82  * which lets us plug in FPGA, I2C, and other implementations.
  83  * *
  84  * The original OMAP-specfic calls should eventually be removed.
  85  */
  86
  87 #include <linux/errno.h>
  88 #include <asm-generic/gpio.h>
  89
  90 static inline int gpio_get_value(unsigned gpio)
  91 {
  92         return __gpio_get_value(gpio);
  93 }
  94
  95 static inline void gpio_set_value(unsigned gpio, int value)
  96 {
  97         __gpio_set_value(gpio, value);
  98 }
  99
 100 static inline int gpio_cansleep(unsigned gpio)
 101 {
 102         return __gpio_cansleep(gpio);
 103 }
 104
 105 static inline int gpio_to_irq(unsigned gpio)
 106 {
 107         return __gpio_to_irq(gpio);
 108 }
 109
 110 static inline int irq_to_gpio(unsigned irq)
 111 {
 112         int tmp;
 113
 114         /* omap1 SOC mpuio */
 115         if (cpu_class_is_omap1() && (irq < (IH_MPUIO_BASE + 16)))
 116                 return (irq - IH_MPUIO_BASE) + OMAP_MAX_GPIO_LINES;
 117
 118         /* SOC gpio */
 119         tmp = irq - IH_GPIO_BASE;
 120         if (tmp < OMAP_MAX_GPIO_LINES)
 121                 return tmp;
 122
 123         /* we don't supply reverse mappings for non-SOC gpios */
 124         return -EIO;
 125 }
 126
 127 #endif