[BSP][k210]Add GPIO driver

bsp/k210/driver/SConscript

@@ -11,6 +11,9 @@ drv_io_config.c
 ''')
 CPPPATH = [cwd]
 
+if GetDepend('RT_USING_PIN'):
+    src += ['drv_gpio.c']
+
 if GetDepend('BSP_USING_LCD'):
     src += ['drv_lcd.c']
 

bsp/k210/driver/drv_gpio.c

+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2019-03-19     ZYH          first version
+ */
+
+#include <rtthread.h>
+#include <rtdevice.h>
+#include <fpioa.h>
+#include <gpiohs.h>
+#include "drv_gpio.h"
+#include "drv_io_config.h"
+#include <plic.h>
+#include <rthw.h>
+#include <utils.h>
+#include <string.h>
+
+#define DBG_ENABLE
+#define DBG_SECTION_NAME  "PIN"
+#define DBG_LEVEL         DBG_WARNING
+#define DBG_COLOR
+#include <rtdbg.h>
+
+#define FUNC_GPIOHS(n) (FUNC_GPIOHS0 + n)
+
+static int pin_alloc_table[FPIOA_NUM_IO];
+static uint32_t free_pin = 0;
+
+static int alloc_pin_channel(rt_base_t pin_index)
+{
+    if(free_pin == 31)
+    {
+        LOG_E("no free gpiohs channel to alloc");
+        return -1;
+    }
+
+    if(pin_alloc_table[pin_index] != -1)
+    {
+        LOG_W("already alloc gpiohs channel for pin %d", pin_index);
+        return pin_alloc_table[pin_index];
+    }
+
+    pin_alloc_table[pin_index] = free_pin;
+    free_pin++;
+
+    fpioa_set_function(pin_index, FUNC_GPIOHS(pin_alloc_table[pin_index]));
+    return pin_alloc_table[pin_index];
+}
+
+static int get_pin_channel(rt_base_t pin_index)
+{
+    return pin_alloc_table[pin_index];
+}
+
+static void free_pin_channel(rt_base_t pin_index)
+{
+    if(pin_alloc_table[pin_index] == -1)
+    {
+        LOG_W("free error:not alloc gpiohs channel for pin %d", pin_index);
+        return;
+    }
+    pin_alloc_table[pin_index] = -1;
+    free_pin--;
+}
+
+
+static void drv_pin_mode(struct rt_device *device, rt_base_t pin, rt_base_t mode)
+{
+    int pin_channel = get_pin_channel(pin);
+    if(pin_channel == -1)
+    {
+        pin_channel = alloc_pin_channel(pin);
+        if(pin_channel == -1)
+        {
+            return;
+        }
+    }
+
+    switch (mode)
+    {
+        case PIN_MODE_OUTPUT:
+            gpiohs_set_drive_mode(pin_channel, GPIO_DM_OUTPUT);
+            break;
+        case PIN_MODE_INPUT:
+            gpiohs_set_drive_mode(pin_channel, GPIO_DM_INPUT);
+            break;
+        case PIN_MODE_INPUT_PULLUP:
+            gpiohs_set_drive_mode(pin_channel, GPIO_DM_INPUT_PULL_UP);
+            break;
+        case PIN_MODE_INPUT_PULLDOWN:
+            gpiohs_set_drive_mode(pin_channel, GPIO_DM_INPUT_PULL_DOWN);
+            break;
+        default:
+            LOG_E("Not support mode %d", mode);
+            break;
+    }
+}
+
+static void drv_pin_write(struct rt_device *device, rt_base_t pin, rt_base_t value)
+{
+    int pin_channel = get_pin_channel(pin);
+    if(pin_channel == -1)
+    {
+        LOG_E("pin %d not set mode", pin);
+        return;
+    }
+    gpiohs_set_pin(pin_channel, value == PIN_HIGH ? GPIO_PV_HIGH : GPIO_PV_LOW);
+}
+
+static int drv_pin_read(struct rt_device *device, rt_base_t pin)
+{
+    int pin_channel = get_pin_channel(pin);
+    if(pin_channel == -1)
+    {
+        LOG_E("pin %d not set mode", pin);
+        return -1;
+    }
+    return gpiohs_get_pin(pin_channel) == GPIO_PV_HIGH ? PIN_HIGH : PIN_LOW;
+}
+
+static struct 
+{
+    void (*hdr)(void *args);
+    void *args;
+    gpio_pin_edge_t edge;
+} irq_table[32];
+
+static void pin_irq(int vector, void *param)
+{
+    int pin_channel = vector - IRQN_GPIOHS0_INTERRUPT;
+    if(irq_table[pin_channel].edge & GPIO_PE_FALLING)
+    {
+        set_gpio_bit(gpiohs->fall_ie.u32, pin_channel, 0);
+        set_gpio_bit(gpiohs->fall_ip.u32, pin_channel, 1);
+        set_gpio_bit(gpiohs->fall_ie.u32, pin_channel, 1);
+    }
+
+    if(irq_table[pin_channel 2019-03-18     ZYH          first version].edge & GPIO_PE_RISING)
+    {
+        set_gpio_bit(gpiohs->rise_ie.u32, pin_channel, 0);
+        set_gpio_bit(gpiohs->rise_ip.u32, pin_channel, 1);
+        set_gpio_bit(gpiohs->rise_ie.u32, pin_channel, 1);
+    }
+
+    if(irq_table[pin_channel].edge & GPIO_PE_LOW)
+    {
+        set_gpio_bit(gpiohs->low_ie.u32, pin_channel, 0);
+        set_gpio_bit(gpiohs->low_ip.u32, pin_channel, 1);
+        set_gpio_bit(gpiohs->low_ie.u32, pin_channel, 1);
+    }
+
+    if(irq_table[pin_channel].edge & GPIO_PE_HIGH)
+    {
+        set_gpio_bit(gpiohs->high_ie.u32, pin_channel, 0);
+        set_gpio_bit(gpiohs->high_ip.u32, pin_channel, 1);
+        set_gpio_bit(gpiohs->high_ie.u32, pin_channel, 1);
+    }
+    if(irq_table[pin_channel].hdr)
+    {
+        irq_table[pin_channel].hdr(irq_table[pin_channel].args);
+    }
+}
+
+static rt_err_t drv_pin_attach_irq(struct rt_device *device, rt_int32_t pin,
+                                   rt_uint32_t mode, void (*hdr)(void *args), void *args)
+{
+    int pin_channel = get_pin_channel(pin);
+    char irq_name[10];
+    if(pin_channel == -1)
+    {
+        LOG_E("pin %d not set mode", pin);
+        return -RT_ERROR;
+    }
+    irq_table[pin_channel].hdr = hdr;
+    irq_table[pin_channel].args = args;
+    switch (mode)
+    {
+        case PIN_IRQ_MODE_RISING:
+            irq_table[pin_channel].edge = GPIO_PE_FALLING;
+            break;
+        case PIN_IRQ_MODE_FALLING:
+            irq_table[pin_channel].edge = GPIO_PE_RISING;
+            break;
+        case PIN_IRQ_MODE_RISING_FALLING:
+            irq_table[pin_channel].edge = GPIO_PE_BOTH;
+            break;
+        case PIN_IRQ_MODE_HIGH_LEVEL:
+            irq_table[pin_channel].edge = GPIO_PE_LOW;
+            break;
+        case PIN_IRQ_MODE_LOW_LEVEL:
+            irq_table[pin_channel].edge = GPIO_PE_HIGH;
+            break;
+        default:
+            break;
+    }
+    gpiohs_set_pin_edge(pin_channel, irq_table[pin_channel].edge);
+    rt_snprintf(irq_name, sizeof irq_name, "pin%d", pin);
+    rt_hw_interrupt_install(IRQN_GPIOHS0_INTERRUPT + pin_channel, pin_irq, RT_NULL, irq_name);
+
+    return RT_EOK;
+}
+
+static rt_err_t drv_pin_detach_irq(struct rt_device *device, rt_int32_t pin)
+{
+    rt_err_t ret = RT_EOK;
+
+    int pin_channel = get_pin_channel(pin);
+    if(pin_channel == -1)
+    {
+        LOG_E("pin %d not set mode", pin);
+        return -RT_ERROR;
+    }
+
+    irq_table[pin_channel].hdr = RT_NULL;
+    irq_table[pin_channel].args = RT_NULL;
+
+    return ret;
+}
+
+static rt_err_t drv_pin_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint32_t enabled)
+{
+    int pin_channel = get_pin_channel(pin);
+
+    if(pin_channel == -1)
+    {
+        LOG_E("pin %d not set mode", pin);
+        return -RT_ERROR;
+    }
+
+    if(enabled)
+    {
+        rt_hw_interrupt_umask(IRQN_GPIOHS0_INTERRUPT + pin_channel);
+    }
+    else
+    {
+        rt_hw_interrupt_mask(IRQN_GPIOHS0_INTERRUPT + pin_channel);
+    }
+    
+    return RT_EOK;
+}
+
+const static struct rt_pin_ops drv_pin_ops =
+{
+    drv_pin_mode,
+    drv_pin_write,
+    drv_pin_read,
+
+    drv_pin_attach_irq,
+    drv_pin_detach_irq,
+    drv_pin_irq_enable
+};
+
+int rt_hw_pin_init(void)
+{
+    rt_err_t ret = RT_EOK;
+    memset(pin_alloc_table, 0, sizeof pin_alloc_table);
+    free_pin = GPIO_ALLOC_START;
+    ret = rt_device_pin_register("pin", &drv_pin_ops, RT_NULL);
+
+    return ret;
+}
+INIT_BOARD_EXPORT(rt_hw_pin_init);
+

bsp/k210/driver/drv_gpio.h

+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2019-03-19     ZYH          first version
+ */
+
+#ifndef DRV_GPIO_H__
+#define DRV_GPIO_H__
+
+int rt_hw_pin_init(void);
+
+#endif
\ No newline at end of file

bsp/k210/driver/drv_io_config.h

@@ -18,6 +18,7 @@ enum HS_GPIO_CONFIG
 #ifdef BSP_SPI1_USING_SS3
     SPI1_CS3_PIN,
 #endif
+    GPIO_ALLOC_START /* index of gpio driver start */
 };
 
 extern int io_config_init(void);