include/asm-ppc/gpio.h

   1 /*
   2  * (C) Copyright 2007
   3  * Stefan Roese, DENX Software Engineering, sr@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 /* 4xx PPC's have 2 GPIO controllers */
  25 #if defined(CONFIG_405EZ) ||                                    \
  26         defined(CONFIG_440EP) || defined(CONFIG_440GR) ||       \
  27         defined(CONFIG_440EPX) || defined(CONFIG_440GRX)
  28 #define GPIO_GROUP_MAX  2
  29 #else
  30 #define GPIO_GROUP_MAX  1
  31 #endif
  32
  33 #define GPIO_MAX        32
  34 #define GPIO_ALT1_SEL   0x40000000
  35 #define GPIO_ALT2_SEL   0x80000000
  36 #define GPIO_ALT3_SEL   0xc0000000
  37 #define GPIO_IN_SEL     0x40000000
  38 #define GPIO_MASK       0xc0000000
  39
  40 #define GPIO_VAL(gpio)  (0x80000000 >> (gpio))
  41
  42 #ifndef __ASSEMBLY__
  43 typedef enum gpio_select { GPIO_SEL, GPIO_ALT1, GPIO_ALT2, GPIO_ALT3 } gpio_select_t;
  44 typedef enum gpio_driver { GPIO_DIS, GPIO_IN, GPIO_OUT, GPIO_BI } gpio_driver_t;
  45 typedef enum gpio_out    { GPIO_OUT_0, GPIO_OUT_1, GPIO_OUT_NO_CHG } gpio_out_t;
  46
  47 typedef struct {
  48         unsigned long   add;    /* gpio core base address       */
  49         gpio_driver_t   in_out; /* Driver Setting               */
  50         gpio_select_t   alt_nb; /* Selected Alternate           */
  51         gpio_out_t      out_val;/* Default Output Value         */
  52 } gpio_param_s;
  53 #endif
  54
  55 void gpio_config(int pin, int in_out, int gpio_alt, int out_val);
  56 void gpio_write_bit(int pin, int val);
  57 int gpio_read_out_bit(int pin);
  58 void gpio_set_chip_configuration(void);