cpu/at32ap/pio.c

   1 /*
   2  * Copyright (C) 2006 Atmel Corporation
   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., 59 Temple Place, Suite 330, Boston,
  20  * MA 02111-1307 USA
  21  */
  22 #include <common.h>
  23
  24 #include <asm/io.h>
  25 #include <asm/arch/gpio.h>
  26 #include <asm/arch/memory-map.h>
  27
  28 #include "pio2.h"
  29
  30 void gpio_select_periph_A(unsigned int pin, int use_pullup)
  31 {
  32         void *base = gpio_pin_to_addr(pin);
  33         uint32_t mask = 1 << (pin & 0x1f);
  34
  35         if (!base)
  36                 panic("Invalid GPIO pin %u\n", pin);
  37
  38         pio2_writel(base, ASR, mask);
  39         pio2_writel(base, PDR, mask);
  40         if (use_pullup)
  41                 pio2_writel(base, PUER, mask);
  42         else
  43                 pio2_writel(base, PUDR, mask);
  44 }
  45
  46 void gpio_select_periph_B(unsigned int pin, int use_pullup)
  47 {
  48         void *base = gpio_pin_to_addr(pin);
  49         uint32_t mask = 1 << (pin & 0x1f);
  50
  51         if (!base)
  52                 panic("Invalid GPIO pin %u\n", pin);
  53
  54         pio2_writel(base, BSR, mask);
  55         pio2_writel(base, PDR, mask);
  56         if (use_pullup)
  57                 pio2_writel(base, PUER, mask);
  58         else
  59                 pio2_writel(base, PUDR, mask);
  60 }