target/linux/ifxmips/files/include/asm-mips/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
  23 #ifndef _IFXMIPS_GPIO_H_
  24 #define _IFXMIPS_GPIO_H_
  25
  26 #include <asm/ifxmips/ifxmips.h>
  27 #include <asm/ifxmips/ifxmips_gpio.h>
  28
  29 #define GPIO_TO_PORT(x) ((x > 15)?(1):(0))
  30 #define GPIO_TO_GPIO(x) ((x > 15)?(x-16):(x))
  31
  32 static inline int gpio_direction_input(unsigned gpio) {
  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         ifxmips_port_clear_open_drain(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
  42         ifxmips_port_clear_altsel0(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
  43         ifxmips_port_clear_altsel1(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
  44         ifxmips_port_set_dir_out(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
  45         return 0;
  46 }
  47
  48 static inline int gpio_get_value(unsigned gpio) {
  49         ifxmips_port_get_input(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
  50         return 0;
  51 }
  52
  53 static inline void gpio_set_value(unsigned gpio, int value) {
  54         if(value)
  55                 ifxmips_port_set_output(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
  56         else
  57                 ifxmips_port_clear_output(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
  58 }
  59
  60 static inline int gpio_request(unsigned gpio, const char *label) {
  61         return 0;
  62 }
  63
  64 static inline void gpio_free(unsigned gpio) {
  65 }
  66
  67 static inline int gpio_to_irq(unsigned gpio) {
  68         return 0;
  69 }
  70
  71 static inline int irq_to_gpio(unsigned irq) {
  72         return 0;
  73 }
  74
  75 static inline int gpio_cansleep(unsigned gpio) {
  76         return 0;
  77 }
  78
  79 static inline int gpio_get_value_cansleep(unsigned gpio) {
  80         might_sleep();
  81         return gpio_get_value(gpio);
  82 }
  83
  84 static inline void gpio_set_value_cansleep(unsigned gpio, int value) {
  85         might_sleep();
  86         gpio_set_value(gpio, value);
  87 }
  88
  89 static inline int gpio_is_valid(int number)
  90 {
  91         return ((unsigned)number) < 8;
  92 }
  93
  94 #endif