arch/arm/plat-omap/include/plat/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 <linux/platform_device.h>
  31 #include <mach/irqs.h>
  32
  33 #define OMAP1_MPUIO_BASE                        0xfffb5000
  34
  35 /*
  36  * These are the omap15xx/16xx offsets. The omap7xx offset are
  37  * OMAP_MPUIO_ / 2 offsets below.
  38  */
  39 #define OMAP_MPUIO_INPUT_LATCH          0x00
  40 #define OMAP_MPUIO_OUTPUT               0x04
  41 #define OMAP_MPUIO_IO_CNTL              0x08
  42 #define OMAP_MPUIO_KBR_LATCH            0x10
  43 #define OMAP_MPUIO_KBC                  0x14
  44 #define OMAP_MPUIO_GPIO_EVENT_MODE      0x18
  45 #define OMAP_MPUIO_GPIO_INT_EDGE        0x1c
  46 #define OMAP_MPUIO_KBD_INT              0x20
  47 #define OMAP_MPUIO_GPIO_INT             0x24
  48 #define OMAP_MPUIO_KBD_MASKIT           0x28
  49 #define OMAP_MPUIO_GPIO_MASKIT          0x2c
  50 #define OMAP_MPUIO_GPIO_DEBOUNCING      0x30
  51 #define OMAP_MPUIO_LATCH                0x34
  52
  53 #define OMAP34XX_NR_GPIOS               6
  54
  55 #define OMAP_MPUIO(nr)          (OMAP_MAX_GPIO_LINES + (nr))
  56 #define OMAP_GPIO_IS_MPUIO(nr)  ((nr) >= OMAP_MAX_GPIO_LINES)
  57
  58 #define OMAP_GPIO_IRQ(nr)       (OMAP_GPIO_IS_MPUIO(nr) ? \
  59                                  IH_MPUIO_BASE + ((nr) & 0x0f) : \
  60                                  IH_GPIO_BASE + (nr))
  61
  62 #define METHOD_MPUIO            0
  63 #define METHOD_GPIO_1510        1
  64 #define METHOD_GPIO_1610        2
  65 #define METHOD_GPIO_7XX         3
  66 #define METHOD_GPIO_24XX        5
  67 #define METHOD_GPIO_44XX        6
  68
  69 struct omap_gpio_dev_attr {
  70         int bank_width;         /* GPIO bank width */
  71         bool dbck_flag;         /* dbck required or not - True for OMAP3&4 */
  72 };
  73
  74 struct omap_gpio_platform_data {
  75         u16 virtual_irq_start;
  76         int bank_type;
  77         int bank_width;         /* GPIO bank width */
  78         int bank_stride;        /* Only needed for omap1 MPUIO */
  79         bool dbck_flag;         /* dbck required or not - True for OMAP3&4 */
  80 };
  81
  82 /* TODO: Analyze removing gpio_bank_count usage from driver code */
  83 extern int gpio_bank_count;
  84
  85 extern void omap2_gpio_prepare_for_idle(int off_mode);
  86 extern void omap2_gpio_resume_after_idle(void);
  87 extern void omap_set_gpio_debounce(int gpio, int enable);
  88 extern void omap_set_gpio_debounce_time(int gpio, int enable);
  89 extern void omap_gpio_save_context(void);
  90 extern void omap_gpio_restore_context(void);
  91 /*-------------------------------------------------------------------------*/
  92
  93 /* Wrappers for "new style" GPIO calls, using the new infrastructure
  94  * which lets us plug in FPGA, I2C, and other implementations.
  95  * *
  96  * The original OMAP-specific calls should eventually be removed.
  97  */
  98
  99 #include <linux/errno.h>
 100 #include <asm-generic/gpio.h>
 101
 102 static inline int gpio_get_value(unsigned gpio)
 103 {
 104         return __gpio_get_value(gpio);
 105 }
 106
 107 static inline void gpio_set_value(unsigned gpio, int value)
 108 {
 109         __gpio_set_value(gpio, value);
 110 }
 111
 112 static inline int gpio_cansleep(unsigned gpio)
 113 {
 114         return __gpio_cansleep(gpio);
 115 }
 116
 117 static inline int gpio_to_irq(unsigned gpio)
 118 {
 119         return __gpio_to_irq(gpio);
 120 }
 121
 122 static inline int irq_to_gpio(unsigned irq)
 123 {
 124         int tmp;
 125
 126         /* omap1 SOC mpuio */
 127         if (cpu_class_is_omap1() && (irq < (IH_MPUIO_BASE + 16)))
 128                 return (irq - IH_MPUIO_BASE) + OMAP_MAX_GPIO_LINES;
 129
 130         /* SOC gpio */
 131         tmp = irq - IH_GPIO_BASE;
 132         if (tmp < OMAP_MAX_GPIO_LINES)
 133                 return tmp;
 134
 135         /* we don't supply reverse mappings for non-SOC gpios */
 136         return -EIO;
 137 }
 138
 139 #endif