include/asm-arm/arch-omap/gpio.h

   1 /*
   2  * linux/include/asm-arm/arch-omap/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 <asm/hardware.h>
  30 #include <asm/arch/irqs.h>
  31 #include <asm/io.h>
  32
  33 #define OMAP_MPUIO_BASE                 (void __iomem *)0xfffb5000
  34
  35 #ifdef CONFIG_ARCH_OMAP730
  36 #define OMAP_MPUIO_INPUT_LATCH          0x00
  37 #define OMAP_MPUIO_OUTPUT               0x02
  38 #define OMAP_MPUIO_IO_CNTL              0x04
  39 #define OMAP_MPUIO_KBR_LATCH            0x08
  40 #define OMAP_MPUIO_KBC                  0x0a
  41 #define OMAP_MPUIO_GPIO_EVENT_MODE      0x0c
  42 #define OMAP_MPUIO_GPIO_INT_EDGE        0x0e
  43 #define OMAP_MPUIO_KBD_INT              0x10
  44 #define OMAP_MPUIO_GPIO_INT             0x12
  45 #define OMAP_MPUIO_KBD_MASKIT           0x14
  46 #define OMAP_MPUIO_GPIO_MASKIT          0x16
  47 #define OMAP_MPUIO_GPIO_DEBOUNCING      0x18
  48 #define OMAP_MPUIO_LATCH                0x1a
  49 #else
  50 #define OMAP_MPUIO_INPUT_LATCH          0x00
  51 #define OMAP_MPUIO_OUTPUT               0x04
  52 #define OMAP_MPUIO_IO_CNTL              0x08
  53 #define OMAP_MPUIO_KBR_LATCH            0x10
  54 #define OMAP_MPUIO_KBC                  0x14
  55 #define OMAP_MPUIO_GPIO_EVENT_MODE      0x18
  56 #define OMAP_MPUIO_GPIO_INT_EDGE        0x1c
  57 #define OMAP_MPUIO_KBD_INT              0x20
  58 #define OMAP_MPUIO_GPIO_INT             0x24
  59 #define OMAP_MPUIO_KBD_MASKIT           0x28
  60 #define OMAP_MPUIO_GPIO_MASKIT          0x2c
  61 #define OMAP_MPUIO_GPIO_DEBOUNCING      0x30
  62 #define OMAP_MPUIO_LATCH                0x34
  63 #endif
  64
  65 #define OMAP34XX_NR_GPIOS               6
  66
  67 #define OMAP_MPUIO(nr)          (OMAP_MAX_GPIO_LINES + (nr))
  68 #define OMAP_GPIO_IS_MPUIO(nr)  ((nr) >= OMAP_MAX_GPIO_LINES)
  69
  70 #define OMAP_GPIO_IRQ(nr)       (OMAP_GPIO_IS_MPUIO(nr) ? \
  71                                  IH_MPUIO_BASE + ((nr) & 0x0f) : \
  72                                  IH_GPIO_BASE + (nr))
  73
  74 extern int omap_gpio_init(void);        /* Call from board init only */
  75 extern int omap_request_gpio(int gpio);
  76 extern void omap_free_gpio(int gpio);
  77 extern void omap_set_gpio_direction(int gpio, int is_input);
  78 extern void omap_set_gpio_dataout(int gpio, int enable);
  79 extern int omap_get_gpio_datain(int gpio);
  80 extern void omap_set_gpio_debounce(int gpio, int enable);
  81 extern void omap_set_gpio_debounce_time(int gpio, int enable);
  82
  83 /*-------------------------------------------------------------------------*/
  84
  85 /* wrappers for "new style" GPIO calls. the old OMAP-specfic ones should
  86  * eventually be removed (along with this errno.h inclusion), and maybe
  87  * gpios should put MPUIOs last too.
  88  */
  89
  90 #include <asm/errno.h>
  91
  92 static inline int gpio_request(unsigned gpio, const char *label)
  93 {
  94         return omap_request_gpio(gpio);
  95 }
  96
  97 static inline void gpio_free(unsigned gpio)
  98 {
  99         omap_free_gpio(gpio);
 100 }
 101
 102 static inline int __gpio_set_direction(unsigned gpio, int is_input)
 103 {
 104         if (cpu_class_is_omap2()) {
 105                 if (gpio > OMAP_MAX_GPIO_LINES)
 106                         return -EINVAL;
 107         } else {
 108                 if (gpio > (OMAP_MAX_GPIO_LINES + 16 /* MPUIO */))
 109                         return -EINVAL;
 110         }
 111         omap_set_gpio_direction(gpio, is_input);
 112         return 0;
 113 }
 114
 115 static inline int gpio_direction_input(unsigned gpio)
 116 {
 117         return __gpio_set_direction(gpio, 1);
 118 }
 119
 120 static inline int gpio_direction_output(unsigned gpio, int value)
 121 {
 122         omap_set_gpio_dataout(gpio, value);
 123         return __gpio_set_direction(gpio, 0);
 124 }
 125
 126 static inline int gpio_get_value(unsigned gpio)
 127 {
 128         return omap_get_gpio_datain(gpio);
 129 }
 130
 131 static inline void gpio_set_value(unsigned gpio, int value)
 132 {
 133         omap_set_gpio_dataout(gpio, value);
 134 }
 135
 136 #include <asm-generic/gpio.h>           /* cansleep wrappers */
 137
 138 static inline int gpio_to_irq(unsigned gpio)
 139 {
 140         return OMAP_GPIO_IRQ(gpio);
 141 }
 142
 143 static inline int irq_to_gpio(unsigned irq)
 144 {
 145         if (cpu_class_is_omap1() && (irq < (IH_MPUIO_BASE + 16)))
 146                 return (irq - IH_MPUIO_BASE) + OMAP_MAX_GPIO_LINES;
 147         return irq - IH_GPIO_BASE;
 148 }
 149
 150 #endif