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 #if defined(CONFIG_CPU_SH3)
  16 #include <cpu/gpio.h>
  17 #endif
  18
  19 typedef unsigned short pinmux_enum_t;
  20 typedef unsigned char pinmux_flag_t;
  21
  22 #define PINMUX_TYPE_NONE            0
  23 #define PINMUX_TYPE_FUNCTION        1
  24 #define PINMUX_TYPE_GPIO            2
  25 #define PINMUX_TYPE_OUTPUT          3
  26 #define PINMUX_TYPE_INPUT           4
  27 #define PINMUX_TYPE_INPUT_PULLUP    5
  28 #define PINMUX_TYPE_INPUT_PULLDOWN  6
  29
  30 #define PINMUX_FLAG_TYPE            (0x7)
  31 #define PINMUX_FLAG_WANT_PULLUP     (1 << 3)
  32 #define PINMUX_FLAG_WANT_PULLDOWN   (1 << 4)
  33
  34 struct pinmux_gpio {
  35         pinmux_enum_t enum_id;
  36         pinmux_flag_t flags;
  37 };
  38
  39 #define PINMUX_GPIO(gpio, data_or_mark) [gpio] = { data_or_mark }
  40 #define PINMUX_DATA(data_or_mark, ids...) data_or_mark, ids, 0
  41
  42 struct pinmux_cfg_reg {
  43         unsigned long reg, reg_width, field_width;
  44         unsigned long *cnt;
  45         pinmux_enum_t *enum_ids;
  46 };
  47
  48 #define PINMUX_CFG_REG(name, r, r_width, f_width) \
  49         .reg = r, .reg_width = r_width, .field_width = f_width,         \
  50         .cnt = (unsigned long [r_width / f_width]) {}, \
  51         .enum_ids = (pinmux_enum_t [(r_width / f_width) * (1 << f_width)]) \
  52
  53 struct pinmux_data_reg {
  54         unsigned long reg, reg_width;
  55         pinmux_enum_t *enum_ids;
  56 };
  57
  58 #define PINMUX_DATA_REG(name, r, r_width) \
  59         .reg = r, .reg_width = r_width, \
  60         .enum_ids = (pinmux_enum_t [r_width]) \
  61
  62 struct pinmux_range {
  63         pinmux_enum_t begin;
  64         pinmux_enum_t end;
  65 };
  66
  67 struct pinmux_info {
  68         char *name;
  69         pinmux_enum_t reserved_id;
  70         struct pinmux_range data;
  71         struct pinmux_range input;
  72         struct pinmux_range input_pd;
  73         struct pinmux_range input_pu;
  74         struct pinmux_range output;
  75         struct pinmux_range mark;
  76         struct pinmux_range function;
  77
  78         unsigned first_gpio, last_gpio;
  79
  80         struct pinmux_gpio *gpios;
  81         struct pinmux_cfg_reg *cfg_regs;
  82         struct pinmux_data_reg *data_regs;
  83
  84         pinmux_enum_t *gpio_data;
  85         unsigned int gpio_data_size;
  86
  87         unsigned long *gpio_in_use;
  88 };
  89
  90 int register_pinmux(struct pinmux_info *pip);
  91
  92 int __gpio_request(unsigned gpio);
  93 static inline int gpio_request(unsigned gpio, const char *label)
  94 {
  95         return __gpio_request(gpio);
  96 }
  97 void gpio_free(unsigned gpio);
  98 int gpio_direction_input(unsigned gpio);
  99 int gpio_direction_output(unsigned gpio, int value);
 100 int gpio_get_value(unsigned gpio);
 101 void gpio_set_value(unsigned gpio, int value);
 102
 103 #include <asm-generic/gpio.h>
 104
 105 #endif /* __ASM_SH_GPIO_H */