bsp: ls2k: initial gpio driver without irq support

Signed-off-by: duhuanpeng <548708880@qq.com>
This commit is contained in:
Du Huanpeng 2020-05-27 17:49:10 +08:00 committed by Du Huanpeng
parent 8039bac92a
commit 725d930937
3 changed files with 171 additions and 1 deletions

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/* SPDX-License-Identifier: Apache-2.0 */
/* Copyright (c) 2006-2018, RT-Thread Development Team
* Copyright (c) 2020, duhuanpeng<548708880@qq.com>
*
* Change Logs:
* Date Author Notes
* 2015-01-20 Bernard the first version
* 2017-10-20 ZYH add mode open drain and input pull down
* 2020-06-01 Du Huanpeng GPIO driver based on <components/drivers/include/drivers/pin.h>
*/
#include <rtthread.h>
#include <drivers/pin.h>
#include <rthw.h>
#include <ls2k1000.h>
struct loongson_gpio {
rt_uint64_t GPIO0_OEN;
rt_uint64_t GPIO1_OEN; /* Reserved */
rt_uint64_t GPIO0_O;
rt_uint64_t GPIO1_O; /* Reserved */
rt_uint64_t GPIO0_I;
rt_uint64_t GPIO1_I; /* Reserved */
rt_uint64_t GPIO0_INTEN;
rt_uint64_t GPIO1_INTEN; /* Reserved */
};
#ifdef RT_USING_PIN
static void loongson_pin_mode(struct rt_device *device, rt_base_t pin, rt_base_t mode)
{
struct loongson_gpio *gpio;
rt_uint64_t m;
gpio = (void *)device->user_data;
m = (rt_uint64_t)1 << pin;
switch (mode) {
case PIN_MODE_OUTPUT:
gpio->GPIO0_OEN &= ~m;
break;
case PIN_MODE_INPUT:
gpio->GPIO0_OEN |= m;
break;
case PIN_MODE_INPUT_PULLUP:
gpio->GPIO0_OEN |= m;
break;
case PIN_MODE_INPUT_PULLDOWN:
gpio->GPIO0_OEN |= m;
break;
case PIN_MODE_OUTPUT_OD:
gpio->GPIO0_OEN &= ~m;
break;
default:
/* error */
rt_kprintf("error\n");
}
}
static void loongson_pin_write(struct rt_device *device, rt_base_t pin, rt_base_t value)
{
struct loongson_gpio *gpio;
rt_uint64_t m;
if (pin < 0 || pin >= 60) {
rt_kprintf("error\n");
return;
}
gpio = (void *)device->user_data;
m = (rt_uint64_t)1 << pin;
if (value)
gpio->GPIO0_O |= m;
else
gpio->GPIO0_O &= ~m;
}
static int loongson_pin_read(struct rt_device *device, rt_base_t pin)
{
struct loongson_gpio *gpio;
int rc;
gpio = (void *)device->user_data;
rt_uint64_t m;
m = gpio->GPIO1_I;
m &= (rt_uint64_t)1 << pin;
rc = !!m;
return rc;
}
/* TODO: add GPIO interrupt */
static rt_err_t loongson_pin_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint32_t mode, void (*hdr)(void *args), void *args)
{
struct loongson_gpio *gpio;
gpio = (void *)device->user_data;
return RT_EOK;
}
static rt_err_t loongson_pin_detach_irq(struct rt_device *device, rt_int32_t pin)
{
struct loongson_gpio *gpio;
gpio = (void *)device->user_data;
return RT_EOK;
}
static rt_err_t loongson_pin_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint32_t enabled)
{
struct loongson_gpio *gpio;
gpio = (void *)device->user_data;
return RT_EOK;
}
static struct rt_pin_ops loongson_pin_ops = {
.pin_mode = loongson_pin_mode,
.pin_write = loongson_pin_write,
.pin_read = loongson_pin_read,
/* TODO: add GPIO interrupt */
.pin_attach_irq = loongson_pin_attach_irq,
.pin_detach_irq = loongson_pin_detach_irq,
.pin_irq_enable = loongson_pin_irq_enable,
};
int loongson_pin_init(void)
{
int rc;
static struct loongson_gpio *loongson_gpio_priv;
loongson_gpio_priv = (void *)GPIO_BASE;
rc = rt_device_pin_register("pin", &loongson_pin_ops, loongson_gpio_priv);
return rc;
}
INIT_BOARD_EXPORT(loongson_pin_init);
#endif /*RT_USING_PIN */

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/* SPDX-License-Identifier: Apache-2.0 */
/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2017-11-24 first version
* 2018-05-11 zhuangwei add gpio interrupt ops
*/
#ifndef __DRV_GPIO_H__
#define __DRV_GPIO_H__
int loongson_pin_init(void);
#endif

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#define UART0_OFF 0x0
#define UART0_BASE CKSEG1ADDR(UART0_BASE_ADDR + UART0_OFF)
#define GPIO_BASE 0xFFFFFFFFBFE10500
void rt_hw_timer_handler(void);
void rt_hw_uart_init(void);
#endif
#endif