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
  27 static inline int gpio_get_value(unsigned gpio)
  28 {
  29         return __gpio_get_value(gpio);
  30 }
  31
  32 static inline void gpio_set_value(unsigned gpio, int value)
  33 {
  34         __gpio_set_value(gpio, value);
  35 }
  36
  37 static inline int gpio_cansleep(unsigned gpio)
  38 {
  39         return __gpio_cansleep(gpio);
  40 }
  41
  42 static inline int gpio_to_irq(unsigned gpio)
  43 {
  44         WARN_ON(1);
  45         return -ENOSYS;
  46 }
  47
  48 static inline int irq_to_gpio(unsigned int irq)
  49 {
  50         WARN_ON(1);
  51         return -EINVAL;
  52 }
  53
  54 #endif /* CONFIG_GPIOLIB */
  55
  56 typedef unsigned short pinmux_enum_t;
  57 typedef 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
  76 struct 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
  84 struct 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
  95 struct 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
 104 struct pinmux_range {
 105         pinmux_enum_t begin;
 106         pinmux_enum_t end;
 107         pinmux_enum_t force;
 108 };
 109
 110 struct 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
 134 int register_pinmux(struct pinmux_info *pip);
 135
 136 #endif /* __ASM_SH_GPIO_H */