LXR linux/arch/sh/include/asm/gpio.h

   1/*
   2 *  include/asm-sh/gpio.h
   3 *
   4 * Generic GPIO API and pinmux table support for SuperH.
   5 *
   6 * Copyright (c) 2008 Magnus Damm
   7 *
   8 * This file is subject to the terms and conditions of the GNU General Public
   9 * License.  See the file "COPYING" in the main directory of this archive
  10 * for more details.
  11 */
  12#ifndef __ASM_SH_GPIO_H
  13#define __ASM_SH_GPIO_H
  14
  15#include <linux/kernel.h>
  16#include <linux/errno.h>
  17
  18#if defined(CONFIG_CPU_SH3)
  19#include <cpu/gpio.h>
  20#endif
  21
  22#define ARCH_NR_GPIOS 512
  23#include <asm-generic/gpio.h>
  24
  25#ifdef CONFIG_GPIOLIB
  26
  27static inline int gpio_get_value(unsigned gpio)
  28{
  29        return __gpio_get_value(gpio);
  30}
  31
  32static inline void gpio_set_value(unsigned gpio, int value)
  33{
  34        __gpio_set_value(gpio, value);
  35}
  36
  37static inline int gpio_cansleep(unsigned gpio)
  38{
  39        return __gpio_cansleep(gpio);
  40}
  41
  42static inline int gpio_to_irq(unsigned gpio)
  43{
  44        WARN_ON(1);
  45        return -ENOSYS;
  46}
  47
  48static inline int irq_to_gpio(unsigned int irq)
  49{
  50        WARN_ON(1);
  51        return -EINVAL;
  52}
  53
  54#endif /* CONFIG_GPIOLIB */
  55
  56typedef unsigned short pinmux_enum_t;
  57typedef unsigned short pinmux_flag_t;
  58
  59#define PINMUX_TYPE_NONE            0
  60#define PINMUX_TYPE_FUNCTION        1
  61#define PINMUX_TYPE_GPIO            2
  62#define PINMUX_TYPE_OUTPUT          3
  63#define PINMUX_TYPE_INPUT           4
  64#define PINMUX_TYPE_INPUT_PULLUP    5
  65#define PINMUX_TYPE_INPUT_PULLDOWN  6
  66
  67#define PINMUX_FLAG_TYPE            (0x7)
  68#define PINMUX_FLAG_WANT_PULLUP     (1 << 3)
  69#define PINMUX_FLAG_WANT_PULLDOWN   (1 << 4)
  70
  71#define PINMUX_FLAG_DBIT_SHIFT      5
  72#define PINMUX_FLAG_DBIT            (0x1f << PINMUX_FLAG_DBIT_SHIFT)
  73#define PINMUX_FLAG_DREG_SHIFT      10
  74#define PINMUX_FLAG_DREG            (0x3f << PINMUX_FLAG_DREG_SHIFT)
  75
  76struct pinmux_gpio {
  77        pinmux_enum_t enum_id;
  78        pinmux_flag_t flags;
  79};
  80
  81#define PINMUX_GPIO(gpio, data_or_mark) [gpio] = { data_or_mark }
  82#define PINMUX_DATA(data_or_mark, ids...) data_or_mark, ids, 0
  83
  84struct pinmux_cfg_reg {
  85        unsigned long reg, reg_width, field_width;
  86        unsigned long *cnt;
  87        pinmux_enum_t *enum_ids;
  88};
  89
  90#define PINMUX_CFG_REG(name, r, r_width, f_width) \
  91        .reg = r, .reg_width = r_width, .field_width = f_width,         \
  92        .cnt = (unsigned long [r_width / f_width]) {}, \
  93        .enum_ids = (pinmux_enum_t [(r_width / f_width) * (1 << f_width)]) \
  94
  95struct pinmux_data_reg {
  96        unsigned long reg, reg_width, reg_shadow;
  97        pinmux_enum_t *enum_ids;
  98};
  99
 100#define PINMUX_DATA_REG(name, r, r_width) \
 101        .reg = r, .reg_width = r_width, \
 102        .enum_ids = (pinmux_enum_t [r_width]) \
 103
 104struct pinmux_range {
 105        pinmux_enum_t begin;
 106        pinmux_enum_t end;
 107        pinmux_enum_t force;
 108};
 109
 110struct pinmux_info {
 111        char *name;
 112        pinmux_enum_t reserved_id;
 113        struct pinmux_range data;
 114        struct pinmux_range input;
 115        struct pinmux_range input_pd;
 116        struct pinmux_range input_pu;
 117        struct pinmux_range output;
 118        struct pinmux_range mark;
 119        struct pinmux_range function;
 120
 121        unsigned first_gpio, last_gpio;
 122
 123        struct pinmux_gpio *gpios;
 124        struct pinmux_cfg_reg *cfg_regs;
 125        struct pinmux_data_reg *data_regs;
 126
 127        pinmux_enum_t *gpio_data;
 128        unsigned int gpio_data_size;
 129
 130        unsigned long *gpio_in_use;
 131        struct gpio_chip chip;
 132};
 133
 134int register_pinmux(struct pinmux_info *pip);
 135
 136#endif /* __ASM_SH_GPIO_H */
 137