arch/arm/plat-nomadik/include/plat/gpio.h

   1 /*
   2  * Structures and registers for GPIO access in the Nomadik SoC
   3  *
   4  * Copyright (C) 2008 STMicroelectronics
   5  *     Author: Prafulla WADASKAR <prafulla.wadaskar@st.com>
   6  * Copyright (C) 2009 Alessandro Rubini <rubini@unipv.it>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12 #ifndef __ASM_PLAT_GPIO_H
  13 #define __ASM_PLAT_GPIO_H
  14
  15 #include <asm-generic/gpio.h>
  16
  17 /*
  18  * These currently cause a function call to happen, they may be optimized
  19  * if needed by adding cpu-specific defines to identify blocks
  20  * (see mach-pxa/include/mach/gpio.h as an example using GPLR etc)
  21  */
  22 #define gpio_get_value  __gpio_get_value
  23 #define gpio_set_value  __gpio_set_value
  24 #define gpio_cansleep   __gpio_cansleep
  25 #define gpio_to_irq     __gpio_to_irq
  26
  27 /*
  28  * "nmk_gpio" and "NMK_GPIO" stand for "Nomadik GPIO", leaving
  29  * the "gpio" namespace for generic and cross-machine functions
  30  */
  31
  32 /* Register in the logic block */
  33 #define NMK_GPIO_DAT    0x00
  34 #define NMK_GPIO_DATS   0x04
  35 #define NMK_GPIO_DATC   0x08
  36 #define NMK_GPIO_PDIS   0x0c
  37 #define NMK_GPIO_DIR    0x10
  38 #define NMK_GPIO_DIRS   0x14
  39 #define NMK_GPIO_DIRC   0x18
  40 #define NMK_GPIO_SLPC   0x1c
  41 #define NMK_GPIO_AFSLA  0x20
  42 #define NMK_GPIO_AFSLB  0x24
  43
  44 #define NMK_GPIO_RIMSC  0x40
  45 #define NMK_GPIO_FIMSC  0x44
  46 #define NMK_GPIO_IS     0x48
  47 #define NMK_GPIO_IC     0x4c
  48 #define NMK_GPIO_RWIMSC 0x50
  49 #define NMK_GPIO_FWIMSC 0x54
  50 #define NMK_GPIO_WKS    0x58
  51
  52 /* Alternate functions: function C is set in hw by setting both A and B */
  53 #define NMK_GPIO_ALT_GPIO       0
  54 #define NMK_GPIO_ALT_A  1
  55 #define NMK_GPIO_ALT_B  2
  56 #define NMK_GPIO_ALT_C  (NMK_GPIO_ALT_A | NMK_GPIO_ALT_B)
  57
  58 /* Pull up/down values */
  59 enum nmk_gpio_pull {
  60         NMK_GPIO_PULL_NONE,
  61         NMK_GPIO_PULL_UP,
  62         NMK_GPIO_PULL_DOWN,
  63 };
  64
  65 /* Sleep mode */
  66 enum nmk_gpio_slpm {
  67         NMK_GPIO_SLPM_INPUT,
  68         NMK_GPIO_SLPM_WAKEUP_ENABLE = NMK_GPIO_SLPM_INPUT,
  69         NMK_GPIO_SLPM_NOCHANGE,
  70         NMK_GPIO_SLPM_WAKEUP_DISABLE = NMK_GPIO_SLPM_NOCHANGE,
  71 };
  72
  73 extern int nmk_gpio_set_slpm(int gpio, enum nmk_gpio_slpm mode);
  74 extern int nmk_gpio_set_pull(int gpio, enum nmk_gpio_pull pull);
  75 extern int nmk_gpio_set_mode(int gpio, int gpio_mode);
  76 extern int nmk_gpio_get_mode(int gpio);
  77
  78 /*
  79  * Platform data to register a block: only the initial gpio/irq number.
  80  */
  81 struct nmk_gpio_platform_data {
  82         char *name;
  83         int first_gpio;
  84         int first_irq;
  85 };
  86
  87 #endif /* __ASM_PLAT_GPIO_H */