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 typedef unsigned short pinmux_enum_t;
  23 typedef unsigned char pinmux_flag_t;
  24
  25 #define PINMUX_TYPE_NONE            0
  26 #define PINMUX_TYPE_FUNCTION        1
  27 #define PINMUX_TYPE_GPIO            2
  28 #define PINMUX_TYPE_OUTPUT          3
  29 #define PINMUX_TYPE_INPUT           4
  30 #define PINMUX_TYPE_INPUT_PULLUP    5
  31 #define PINMUX_TYPE_INPUT_PULLDOWN  6
  32
  33 #define PINMUX_FLAG_TYPE            (0x7)
  34 #define PINMUX_FLAG_WANT_PULLUP     (1 << 3)
  35 #define PINMUX_FLAG_WANT_PULLDOWN   (1 << 4)
  36
  37 struct pinmux_gpio {
  38         pinmux_enum_t enum_id;
  39         pinmux_flag_t flags;
  40 };
  41
  42 #define PINMUX_GPIO(gpio, data_or_mark) [gpio] = { data_or_mark }
  43 #define PINMUX_DATA(data_or_mark, ids...) data_or_mark, ids, 0
  44
  45 struct pinmux_cfg_reg {
  46         unsigned long reg, reg_width, field_width;
  47         unsigned long *cnt;
  48         pinmux_enum_t *enum_ids;
  49 };
  50
  51 #define PINMUX_CFG_REG(name, r, r_width, f_width) \
  52         .reg = r, .reg_width = r_width, .field_width = f_width,         \
  53         .cnt = (unsigned long [r_width / f_width]) {}, \
  54         .enum_ids = (pinmux_enum_t [(r_width / f_width) * (1 << f_width)]) \
  55
  56 struct pinmux_data_reg {
  57         unsigned long reg, reg_width;
  58         pinmux_enum_t *enum_ids;
  59 };
  60
  61 #define PINMUX_DATA_REG(name, r, r_width) \
  62         .reg = r, .reg_width = r_width, \
  63         .enum_ids = (pinmux_enum_t [r_width]) \
  64
  65 struct pinmux_range {
  66         pinmux_enum_t begin;
  67         pinmux_enum_t end;
  68         pinmux_enum_t force;
  69 };
  70
  71 struct pinmux_info {
  72         char *name;
  73         pinmux_enum_t reserved_id;
  74         struct pinmux_range data;
  75         struct pinmux_range input;
  76         struct pinmux_range input_pd;
  77         struct pinmux_range input_pu;
  78         struct pinmux_range output;
  79         struct pinmux_range mark;
  80         struct pinmux_range function;
  81
  82         unsigned first_gpio, last_gpio;
  83
  84         struct pinmux_gpio *gpios;
  85         struct pinmux_cfg_reg *cfg_regs;
  86         struct pinmux_data_reg *data_regs;
  87
  88         pinmux_enum_t *gpio_data;
  89         unsigned int gpio_data_size;
  90
  91         unsigned long *gpio_in_use;
  92 };
  93
  94 int register_pinmux(struct pinmux_info *pip);
  95
  96 int __gpio_request(unsigned gpio);
  97 static inline int gpio_request(unsigned gpio, const char *label)
  98 {
  99         return __gpio_request(gpio);
 100 }
 101 void gpio_free(unsigned gpio);
 102 int gpio_direction_input(unsigned gpio);
 103 int gpio_direction_output(unsigned gpio, int value);
 104 int gpio_get_value(unsigned gpio);
 105 void gpio_set_value(unsigned gpio, int value);
 106
 107 /* IRQ modes are unspported */
 108 static inline int gpio_to_irq(unsigned gpio)
 109 {
 110         WARN_ON(1);
 111         return -EINVAL;
 112 }
 113
 114 static inline int irq_to_gpio(unsigned irq)
 115 {
 116         WARN_ON(1);
 117         return -EINVAL;
 118 }
 119
 120 #include <asm-generic/gpio.h>
 121
 122 #endif /* __ASM_SH_GPIO_H */