bsp: ls2k: initial gpio driver without irq support

Signed-off-by: Nduhuanpeng <548708880@qq.com>

bsp/ls2kdev/drivers/drv_gpio.c

+/* 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 */

bsp/ls2kdev/drivers/drv_gpio.h

+/* 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     勤为本          first version
+ * 2018-05-11     zhuangwei    add gpio interrupt ops
+ */
+
+#ifndef __DRV_GPIO_H__
+#define __DRV_GPIO_H__
+
+
+int loongson_pin_init(void);
+
+
+#endif
+

bsp/ls2kdev/drivers/ls2k1000.h

@@ -7,7 +7,10 @@
 #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
\ No newline at end of file
+#endif
+