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/*
* (C) Copyright 2008
* Logic Product Development, <www.logicpd.com>
* Peter Barada <peter.barada@logicpd.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <asm/arch/cpu.h>
#include <asm/io.h>
// #include <asm/arch/bits.h>
#include <asm/arch/mux.h>
#include <asm/arch/sys_proto.h>
// #include <asm/arch/sys_info.h>
#include <asm/arch/clocks.h>
#include <asm/arch/mem.h>
#include <i2c.h>
#include <asm/mach-types.h>
#include "logic-gpio.h"
#define NUM_OF_BITS_IN_REG 32
#define MAX_GPIO_PINS 192
#define GPIO_PIN 1
#define GPIO_MAX_MODULES 6
/* GPIO base address */
#define GPIO1_MODULE_BA 0x48310000
#define GPIO2_MODULE_BA 0x49050000
#define GPIO3_MODULE_BA 0x49052000
#define GPIO4_MODULE_BA 0x49054000
#define GPIO5_MODULE_BA 0x49056000
#define GPIO6_MODULE_BA 0x49058000
#define GPIO_DATAIN ((uint32_t)0x038)
#define GPIO_DATAOUT ((uint32_t)0x03C)
#define GPIO_OE ((uint32_t)0x034)
/* int and long both fit to 32 bits */
typedef volatile uint32_t* PREG_U32;
typedef volatile int32_t* PREG_S32;
#define in_regl(offSet) (*(PREG_U32)(offSet))
#define out_regl(offSet, value) (*(PREG_U32)(offSet) = (uint32_t)(value))
static uint32_t g_gpio_module_base_address[GPIO_MAX_MODULES]
= {GPIO1_MODULE_BA, GPIO2_MODULE_BA, GPIO3_MODULE_BA,
GPIO4_MODULE_BA, GPIO5_MODULE_BA, GPIO6_MODULE_BA};
uint32_t check_gpio_pin_num(uint32_t pin_num)
{
return (pin_num > MAX_GPIO_PINS);
}
uint32_t get_module_pin_mask(uint32_t pin_num, uint32_t *module_num, uint32_t *offset, uint32_t *pinmask)
{
uint32_t snum, ret_val;
*module_num = pin_num / NUM_OF_BITS_IN_REG + 1;
snum = (*module_num-1)*NUM_OF_BITS_IN_REG;
*offset = pin_num - snum;
ret_val = check_gpio_pin_num(pin_num);
if (ret_val)
return ret_val;
*pinmask = GPIO_PIN<<*offset;
return 0;
}
void gpio_write_output_pin(int module_num, uint32_t pin_mask, uint32_t data)
{
uint32_t temp, gpio_data_out_reg;
gpio_data_out_reg = (g_gpio_module_base_address[module_num-1]+GPIO_DATAOUT);
temp = in_regl(gpio_data_out_reg);
temp = temp & ~pin_mask;
out_regl(gpio_data_out_reg, (temp | (data & pin_mask)));
}
void gpio_read_input_pin(uint32_t module_num, uint32_t pin_mask, uint32_t *data)
{
uint32_t gpio_data_in_reg, temp;
gpio_data_in_reg = (g_gpio_module_base_address[module_num-1]+GPIO_DATAIN);
temp = in_regl(gpio_data_in_reg);
*data = temp & pin_mask;
}
uint32_t pin_get_gpio_input(uint32_t pin_num)
{
uint32_t module_num, pinmask, offset, data;
get_module_pin_mask(pin_num, &module_num, &offset, &pinmask);
gpio_read_input_pin(module_num, (1<<offset), &data);
data >>= offset;
// printf("%s:%d pin %d data %d\n", __FUNCTION__, __LINE__, pin_num, data);
return data;
}
uint32_t pin_set_gpio_dataout(uint32_t pin_num, uint32_t set)
{
uint32_t module_num, pinmask, offset, ret_val;
// printf("%s:%d pin %d set %d\n", __FUNCTION__, __LINE__, pin_num, set);
ret_val = get_module_pin_mask(pin_num, &module_num, &offset, &pinmask);
if (set)
gpio_write_output_pin(module_num, (1<<offset), (1<<offset));
else
gpio_write_output_pin(module_num, (1<<offset), (0<<offset));
return ret_val;
}
uint32_t set_gpio_in_out(uint32_t module_num, uint32_t pin_mask, uint32_t io_mask)
{
uint32_t temp_oe, gpio_pin_output_en_reg;
gpio_pin_output_en_reg = (g_gpio_module_base_address[module_num-1]+GPIO_OE);
temp_oe = in_regl(gpio_pin_output_en_reg);
temp_oe &= ~pin_mask;
temp_oe |= io_mask;
out_regl(gpio_pin_output_en_reg, temp_oe);
return 0;
}
uint32_t pin_init_gpio(uint32_t pin_num, uint32_t in_out)
{
uint32_t module_num, pinmask, offset, ret_val;
ret_val = get_module_pin_mask(pin_num, &module_num, &offset, &pinmask);
set_gpio_in_out(module_num, pinmask, in_out<<offset);
return ret_val;
}
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