2 * Copyright (C) 2006 Atmel Corporation
4 * See file CREDITS for list of people who contributed to this
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.
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.
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,
25 #include <asm/arch/gpio.h>
26 #include <asm/arch/memory-map.h>
30 void gpio_select_periph_A(unsigned int pin, int use_pullup)
32 void *base = gpio_pin_to_addr(pin);
33 uint32_t mask = 1 << (pin & 0x1f);
36 panic("Invalid GPIO pin %u\n", pin);
38 pio2_writel(base, ASR, mask);
39 pio2_writel(base, PDR, mask);
41 pio2_writel(base, PUER, mask);
43 pio2_writel(base, PUDR, mask);
46 void gpio_select_periph_B(unsigned int pin, int use_pullup)
48 void *base = gpio_pin_to_addr(pin);
49 uint32_t mask = 1 << (pin & 0x1f);
52 panic("Invalid GPIO pin %u\n", pin);
54 pio2_writel(base, BSR, mask);
55 pio2_writel(base, PDR, mask);
57 pio2_writel(base, PUER, mask);
59 pio2_writel(base, PUDR, mask);
62 void gpio_select_pio(unsigned int pin, unsigned long gpiof_flags)
64 void *base = gpio_pin_to_addr(pin);
65 uint32_t mask = 1 << (pin & 0x1f);
68 panic("Invalid GPIO pin %u\n", pin);
70 if (gpiof_flags & GPIOF_OUTPUT) {
71 if (gpiof_flags & GPIOF_MULTIDRV)
72 pio2_writel(base, MDER, mask);
74 pio2_writel(base, MDDR, mask);
75 pio2_writel(base, PUDR, mask);
76 pio2_writel(base, OER, mask);
78 if (gpiof_flags & GPIOF_PULLUP)
79 pio2_writel(base, PUER, mask);
81 pio2_writel(base, PUDR, mask);
82 if (gpiof_flags & GPIOF_DEGLITCH)
83 pio2_writel(base, IFER, mask);
85 pio2_writel(base, IFDR, mask);
86 pio2_writel(base, ODR, mask);
89 pio2_writel(base, PER, mask);
92 void gpio_set_value(unsigned int pin, int value)
94 void *base = gpio_pin_to_addr(pin);
95 uint32_t mask = 1 << (pin & 0x1f);
98 panic("Invalid GPIO pin %u\n", pin);
101 pio2_writel(base, SODR, mask);
103 pio2_writel(base, CODR, mask);
106 int gpio_get_value(unsigned int pin)
108 void *base = gpio_pin_to_addr(pin);
112 panic("Invalid GPIO pin %u\n", pin);
114 value = pio2_readl(base, PDSR);
115 return (value >> (pin & 0x1f)) & 1;