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/*
* Copyright (c) 2008, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <debug.h>
#include <reg.h>
#include <platform/iomap.h>
#include <dev/gpio.h>
#include "gpio_hw.h"
typedef struct gpioregs gpioregs;
struct gpioregs
{
unsigned out;
unsigned in;
unsigned int_status;
unsigned int_clear;
unsigned int_en;
unsigned int_edge;
unsigned int_pos;
unsigned oe;
};
static gpioregs GPIO_REGS[] = {
{
.out = GPIO_OUT_0,
.in = GPIO_IN_0,
.int_status = GPIO_INT_STATUS_0,
.int_clear = GPIO_INT_CLEAR_0,
.int_en = GPIO_INT_EN_0,
.int_edge = GPIO_INT_EDGE_0,
.int_pos = GPIO_INT_POS_0,
.oe = GPIO_OE_0,
},
{
.out = GPIO_OUT_1,
.in = GPIO_IN_1,
.int_status = GPIO_INT_STATUS_1,
.int_clear = GPIO_INT_CLEAR_1,
.int_en = GPIO_INT_EN_1,
.int_edge = GPIO_INT_EDGE_1,
.int_pos = GPIO_INT_POS_1,
.oe = GPIO_OE_1,
},
{
.out = GPIO_OUT_2,
.in = GPIO_IN_2,
.int_status = GPIO_INT_STATUS_2,
.int_clear = GPIO_INT_CLEAR_2,
.int_en = GPIO_INT_EN_2,
.int_edge = GPIO_INT_EDGE_2,
.int_pos = GPIO_INT_POS_2,
.oe = GPIO_OE_2,
},
{
.out = GPIO_OUT_3,
.in = GPIO_IN_3,
.int_status = GPIO_INT_STATUS_3,
.int_clear = GPIO_INT_CLEAR_3,
.int_en = GPIO_INT_EN_3,
.int_edge = GPIO_INT_EDGE_3,
.int_pos = GPIO_INT_POS_3,
.oe = GPIO_OE_3,
},
{
.out = GPIO_OUT_4,
.in = GPIO_IN_4,
.int_status = GPIO_INT_STATUS_4,
.int_clear = GPIO_INT_CLEAR_4,
.int_en = GPIO_INT_EN_4,
.int_edge = GPIO_INT_EDGE_4,
.int_pos = GPIO_INT_POS_4,
.oe = GPIO_OE_4,
},
{
.out = GPIO_OUT_5,
.in = GPIO_IN_5,
.int_status = GPIO_INT_STATUS_5,
.int_clear = GPIO_INT_CLEAR_5,
.int_en = GPIO_INT_EN_5,
.int_edge = GPIO_INT_EDGE_5,
.int_pos = GPIO_INT_POS_5,
.oe = GPIO_OE_5,
},
{
.out = GPIO_OUT_6,
.in = GPIO_IN_6,
.int_status = GPIO_INT_STATUS_6,
.int_clear = GPIO_INT_CLEAR_6,
.int_en = GPIO_INT_EN_6,
.int_edge = GPIO_INT_EDGE_6,
.int_pos = GPIO_INT_POS_6,
.oe = GPIO_OE_6,
},
{
.out = GPIO_OUT_7,
.in = GPIO_IN_7,
.int_status = GPIO_INT_STATUS_7,
.int_clear = GPIO_INT_CLEAR_7,
.int_en = GPIO_INT_EN_7,
.int_edge = GPIO_INT_EDGE_7,
.int_pos = GPIO_INT_POS_7,
.oe = GPIO_OE_7,
},
};
static gpioregs *find_gpio(unsigned n, unsigned *bit)
{
if(n > 164) return 0;
if(n > 152) {
*bit = 1 << (n - 153);
return GPIO_REGS + 7;
}
if(n > 121) {
*bit = 1 << (n - 122);
return GPIO_REGS + 6;
}
if(n > 103) {
*bit = 1 << (n - 104);
return GPIO_REGS + 5;
}
if(n > 94) {
*bit = 1 << (n - 95);
return GPIO_REGS + 4;
}
if(n > 67) {
*bit = 1 << (n - 68);
return GPIO_REGS + 3;
}
if(n > 42) {
*bit = 1 << (n - 43);
return GPIO_REGS + 2;
}
if(n > 15) {
*bit = 1 << (n - 16);
return GPIO_REGS + 1;
}
*bit = 1 << n;
return GPIO_REGS + 0;
}
int gpio_config(unsigned n, unsigned flags)
{
gpioregs *r;
unsigned b;
unsigned v;
if ((r = find_gpio(n, &b)) == 0)
return -1;
v = readl(r->oe);
if (flags & GPIO_OUTPUT) {
writel(v | b, r->oe);
} else {
writel(v & (~b), r->oe);
}
return 0;
}
void gpio_set(unsigned n, unsigned on)
{
gpioregs *r;
unsigned b;
unsigned v;
if((r = find_gpio(n, &b)) == 0) return;
v = readl(r->out);
if(on) {
writel(v | b, r->out);
} else {
writel(v & (~b), r->out);
}
}
int gpio_get(unsigned n)
{
gpioregs *r;
unsigned b;
if((r = find_gpio(n, &b)) == 0) return 0;
return (readl(r->in) & b) ? 1 : 0;
}