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/*
* This file is part of the coreboot project.
*
*
* 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; version 2 of the License.
*
* 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.
*/
#include <assert.h>
#include <delay.h>
#include <device/mmio.h>
#include <timer.h>
#include <timestamp.h>
#include <types.h>
#include <gpio.h>
void gpio_configure(gpio_t gpio, uint32_t func, uint32_t pull,
uint32_t drive_str, uint32_t enable)
{
uint32_t reg_val;
struct tlmm_gpio *regs = (void *)(uintptr_t)gpio.addr;
/* gpio pull only PULLNONE, PULLUP, KEEPER, PULLDOWN status */
assert(pull <= GPIO_PULL_UP);
reg_val = ((enable & GPIO_CFG_OE_BMSK) << GPIO_CFG_OE_SHFT) |
((drive_str & GPIO_CFG_DRV_BMSK) << GPIO_CFG_DRV_SHFT) |
((func & GPIO_CFG_FUNC_BMSK) << GPIO_CFG_FUNC_SHFT) |
((pull & GPIO_CFG_PULL_BMSK) << GPIO_CFG_PULL_SHFT);
write32(®s->cfg, reg_val);
}
void gpio_set(gpio_t gpio, int value)
{
struct tlmm_gpio *regs = (void *)(uintptr_t)gpio.addr;
write32(®s->in_out, (!!value) << GPIO_IO_OUT_SHFT);
}
int gpio_get(gpio_t gpio)
{
struct tlmm_gpio *regs = (void *)(uintptr_t)gpio.addr;
return ((read32(®s->in_out) >> GPIO_IO_IN_SHFT) &
GPIO_IO_IN_BMSK);
}
void gpio_input_pulldown(gpio_t gpio)
{
gpio_configure(gpio, GPIO_FUNC_GPIO,
GPIO_PULL_DOWN, GPIO_2MA, GPIO_OUTPUT_DISABLE);
}
void gpio_input_pullup(gpio_t gpio)
{
gpio_configure(gpio, GPIO_FUNC_GPIO,
GPIO_PULL_UP, GPIO_2MA, GPIO_OUTPUT_DISABLE);
}
void gpio_input(gpio_t gpio)
{
gpio_configure(gpio, GPIO_FUNC_GPIO,
GPIO_NO_PULL, GPIO_2MA, GPIO_OUTPUT_DISABLE);
}
void gpio_output(gpio_t gpio, int value)
{
gpio_set(gpio, value);
gpio_configure(gpio, GPIO_FUNC_GPIO,
GPIO_NO_PULL, GPIO_2MA, GPIO_OUTPUT_ENABLE);
}
void gpio_input_irq(gpio_t gpio, enum gpio_irq_type type, uint32_t pull)
{
struct tlmm_gpio *regs = (void *)(uintptr_t)gpio.addr;
gpio_configure(gpio, GPIO_FUNC_GPIO,
pull, GPIO_2MA, GPIO_OUTPUT_DISABLE);
clrsetbits32(®s->intr_cfg, GPIO_INTR_DECT_CTL_MASK <<
GPIO_INTR_DECT_CTL_SHIFT, type << GPIO_INTR_DECT_CTL_SHIFT);
clrsetbits32(®s->intr_cfg, GPIO_INTR_RAW_STATUS_ENABLE
<< GPIO_INTR_RAW_STATUS_EN_SHIFT, GPIO_INTR_RAW_STATUS_ENABLE
<< GPIO_INTR_RAW_STATUS_EN_SHIFT);
}
int gpio_irq_status(gpio_t gpio)
{
struct tlmm_gpio *regs = (void *)(uintptr_t)gpio.addr;
if (!(read32(®s->intr_status) & GPIO_INTR_STATUS_MASK))
return 0;
write32(®s->intr_status, GPIO_INTR_STATUS_DISABLE);
return 1;
}
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