include/asm-arm/arch-kirkwood/gpio.h

   1 /*
   2  * arch/asm-arm/mach-kirkwood/include/mach/gpio.h
   3  *
   4  * See file CREDITS for list of people who contributed to this
   5  * project.
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation; either version 2 of
  10  * the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  20  * MA 02110-1301 USA
  21  */
  22
  23 /*
  24  * Based on (mostly copied from) plat-orion based Linux 2.6 kernel driver.
  25  * Removed kernel level irq handling. Took some macros from kernel to
  26  * allow build.
  27  *
  28  * Dieter Kiermaier dk-arm-linux@gmx.de
  29  */
  30
  31 #ifndef __KIRKWOOD_GPIO_H
  32 #define __KIRKWOOD_GPIO_H
  33
  34 /* got from kernel include/linux/bitops.h */
  35 #define BITS_PER_BYTE 8
  36 #define BITS_TO_LONGS(nr)       DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long))
  37
  38 #define GPIO_MAX                50
  39 #define GPIO_OFF(pin)           (((pin) >> 5) ? 0x0040 : 0x0000)
  40 #define GPIO_OUT(pin)           (KW_GPIO0_BASE + GPIO_OFF(pin) + 0x00)
  41 #define GPIO_IO_CONF(pin)       (KW_GPIO0_BASE + GPIO_OFF(pin) + 0x04)
  42 #define GPIO_BLINK_EN(pin)      (KW_GPIO0_BASE + GPIO_OFF(pin) + 0x08)
  43 #define GPIO_IN_POL(pin)        (KW_GPIO0_BASE + GPIO_OFF(pin) + 0x0c)
  44 #define GPIO_DATA_IN(pin)       (KW_GPIO0_BASE + GPIO_OFF(pin) + 0x10)
  45 #define GPIO_EDGE_CAUSE(pin)    (KW_GPIO0_BASE + GPIO_OFF(pin) + 0x14)
  46 #define GPIO_EDGE_MASK(pin)     (KW_GPIO0_BASE + GPIO_OFF(pin) + 0x18)
  47 #define GPIO_LEVEL_MASK(pin)    (KW_GPIO0_BASE + GPIO_OFF(pin) + 0x1c)
  48
  49 /*
  50  * Kirkwood-specific GPIO API
  51  */
  52
  53 void kw_gpio_set_valid(unsigned pin, int mode);
  54 int kw_gpio_is_valid(unsigned pin, int mode);
  55 int kw_gpio_direction_input(unsigned pin);
  56 int kw_gpio_direction_output(unsigned pin, int value);
  57 int kw_gpio_get_value(unsigned pin);
  58 void kw_gpio_set_value(unsigned pin, int value);
  59 void kw_gpio_set_blink(unsigned pin, int blink);
  60 void kw_gpio_set_unused(unsigned pin);
  61
  62 #define GPIO_INPUT_OK           (1 << 0)
  63 #define GPIO_OUTPUT_OK          (1 << 1)
  64
  65 #endif