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