target/linux/ifxmips/files/arch/mips/include/asm/mach-ifxmips/gpio.h

   1 /*
   2  *   include/asm-mips/mach-ifxmips/gpio.h
   3  *
   4  *   This program is free software; you can redistribute it and/or modify
   5  *   it under the terms of the GNU General Public License as published by
   6  *   the Free Software Foundation; either version 2 of the License, or
   7  *   (at your option) any later version.
   8  *
   9  *   This program is distributed in the hope that it will be useful,
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *   GNU General Public License for more details.
  13  *
  14  *   You should have received a copy of the GNU General Public License
  15  *   along with this program; if not, write to the Free Software
  16  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  17  *
  18  *   Copyright (C) 2007 John Crispin <blogic@openwrt.org>
  19  *
  20  */
  21
  22 #ifndef _IFXMIPS_GPIO_H_
  23 #define _IFXMIPS_GPIO_H_
  24
  25 #include <asm/ifxmips/ifxmips.h>
  26 #include <asm/ifxmips/ifxmips_gpio.h>
  27
  28 #define GPIO_TO_PORT(x) ((x > 15) ? (1) : (0))
  29 #define GPIO_TO_GPIO(x) ((x > 15) ? (x-16) : (x))
  30
  31 static inline int gpio_direction_input(unsigned gpio)
  32 {
  33         ifxmips_port_set_open_drain(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
  34         ifxmips_port_clear_altsel0(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
  35         ifxmips_port_clear_altsel1(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
  36         ifxmips_port_set_dir_in(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
  37         return 0;
  38 }
  39
  40 static inline int gpio_direction_output(unsigned gpio, int value)
  41 {
  42         ifxmips_port_clear_open_drain(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
  43         ifxmips_port_clear_altsel0(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
  44         ifxmips_port_clear_altsel1(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
  45         ifxmips_port_set_dir_out(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
  46         return 0;
  47 }
  48
  49 static inline int gpio_get_value(unsigned gpio)
  50 {
  51         ifxmips_port_get_input(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
  52         return 0;
  53 }
  54
  55 static inline void gpio_set_value(unsigned gpio, int value)
  56 {
  57         if (value)
  58                 ifxmips_port_set_output(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
  59         else
  60                 ifxmips_port_clear_output(GPIO_TO_PORT(gpio),
  61                         GPIO_TO_GPIO(gpio));
  62 }
  63
  64 static inline int gpio_request(unsigned gpio, const char *label)
  65 {
  66         return 0;
  67 }
  68
  69 static inline void gpio_free(unsigned gpio)
  70 {
  71 }
  72
  73 static inline int gpio_to_irq(unsigned gpio)
  74 {
  75         return 0;
  76 }
  77
  78 static inline int irq_to_gpio(unsigned irq)
  79 {
  80         return 0;
  81 }
  82
  83 static inline int gpio_cansleep(unsigned gpio)
  84 {
  85         return 0;
  86 }
  87
  88 static inline int gpio_get_value_cansleep(unsigned gpio)
  89 {
  90         might_sleep();
  91         return gpio_get_value(gpio);
  92 }
  93
  94 static inline void gpio_set_value_cansleep(unsigned gpio, int value)
  95 {
  96         might_sleep();
  97         gpio_set_value(gpio, value);
  98 }
  99
 100 static inline int gpio_is_valid(int number)
 101 {
 102         return ((unsigned)number) < 16;
 103 }
 104
 105 #endif