add raspi4 32bit mode bsp

2025-12-27 01:28:23 +00:00 · 2020-05-25 17:30:05 +08:00
parent aca518b6ca
commit 38f400d50a
20 changed files with 1750 additions and 0 deletions
--- a/bsp/raspberry-pi/raspi4-32/driver/drv_uart.c
+++ b/bsp/raspberry-pi/raspi4-32/driver/drv_uart.c
@@ -0,0 +1,152 @@
+/*
+ * Copyright (c) 2006-2020, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author         Notes
+ * 2020-04-16     bigmagic       first version
+ */
+
+#include <rthw.h>
+#include <rtthread.h>
+#include <rtdevice.h>
+
+#include "board.h"
+#include "drv_uart.h"
+#include "drv_gpio.h"
+
+struct hw_uart_device
+{
+    rt_ubase_t hw_base;
+    rt_uint32_t irqno;
+};
+
+static rt_err_t uart_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
+{
+    struct hw_uart_device *uart;
+    uint32_t bauddiv = (UART_REFERENCE_CLOCK / cfg->baud_rate)* 1000 / 16;
+    uint32_t ibrd = bauddiv / 1000;
+
+    RT_ASSERT(serial != RT_NULL);
+    uart = (struct hw_uart_device *)serial->parent.user_data;
+    if(uart->hw_base == PL011_BASE)
+    {
+        uint32_t gpfsel = 0;
+
+        gpfsel &= ~((uint32_t)(0x07 << (4 * 3)));
+        gpfsel |= (uint32_t)(ALT0 << (4 * 3));
+        GPIO_REG_GPFSEL1(GPIO_BASE) = gpfsel;
+
+        gpfsel &= ~((uint32_t)(0x07 << (5 * 3)));
+        gpfsel |= (uint32_t)(ALT0 << (5 * 3));
+        GPIO_REG_GPFSEL1(GPIO_BASE) = gpfsel;
+
+        PL011_REG_CR(uart->hw_base) = 0;/*Clear UART setting*/
+        PL011_REG_LCRH(uart->hw_base) = 0;/*disable FIFO*/
+        PL011_REG_IBRD(uart->hw_base) = ibrd;
+        PL011_REG_FBRD(uart->hw_base) = (((bauddiv - ibrd * 1000) * 64 + 500) / 1000);
+        PL011_REG_LCRH(uart->hw_base) = PL011_LCRH_WLEN_8;/*FIFO*/
+        PL011_REG_CR(uart->hw_base) = PL011_CR_UARTEN | PL011_CR_TXE | PL011_CR_RXE;/*art enable, TX/RX enable*/
+    }
+
+    return RT_EOK;
+}
+
+static rt_err_t uart_control(struct rt_serial_device *serial, int cmd, void *arg)
+{
+    struct hw_uart_device *uart;
+
+    RT_ASSERT(serial != RT_NULL);
+    uart = (struct hw_uart_device *)serial->parent.user_data;
+
+    switch (cmd)
+    {
+    case RT_DEVICE_CTRL_CLR_INT:
+        /* disable rx irq */
+        PL011_REG_IMSC(uart->hw_base) &= ~((uint32_t)PL011_IMSC_RXIM);
+        rt_hw_interrupt_mask(uart->irqno);
+        break;
+
+    case RT_DEVICE_CTRL_SET_INT:
+        /* enable rx irq */
+        PL011_REG_IMSC(uart->hw_base) |= PL011_IMSC_RXIM;
+        rt_hw_interrupt_umask(uart->irqno);
+        break;
+    }
+
+    return RT_EOK;
+}
+
+static int uart_putc(struct rt_serial_device *serial, char c)
+{
+    struct hw_uart_device *uart;
+
+    RT_ASSERT(serial != RT_NULL);
+    uart = (struct hw_uart_device *)serial->parent.user_data;
+
+    while ((PL011_REG_FR(uart->hw_base) & PL011_FR_TXFF));
+    PL011_REG_DR(uart->hw_base) = (uint8_t)c;
+
+    return 1;
+}
+
+static int uart_getc(struct rt_serial_device *serial)
+{
+    int ch = -1;
+    struct hw_uart_device *uart;
+
+    RT_ASSERT(serial != RT_NULL);
+    uart = (struct hw_uart_device *)serial->parent.user_data;
+
+    if((PL011_REG_FR(uart->hw_base) & PL011_FR_RXFE) == 0)
+    {
+        ch = PL011_REG_DR(uart->hw_base) & 0xff;
+    }
+
+    return ch;
+}
+
+static const struct rt_uart_ops _uart_ops =
+{
+    uart_configure,
+    uart_control,
+    uart_putc,
+    uart_getc,
+};
+
+static void rt_hw_uart_isr(int irqno, void *param)
+{
+    struct rt_serial_device *serial = (struct rt_serial_device*)param; 
+    rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
+    PL011_REG_ICR(UART0_BASE) = PL011_INTERRUPT_RECEIVE;
+}
+
+
+/* UART device driver structure */
+static struct hw_uart_device _uart0_device =
+{
+    PL011_BASE,
+    IRQ_PL011,
+};
+
+static struct rt_serial_device _serial0;
+
+int rt_hw_uart_init(void)
+{
+    struct hw_uart_device *uart;
+    struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
+
+    uart = &_uart0_device;
+
+    _serial0.ops    = &_uart_ops;
+    _serial0.config = config;
+
+    /* register UART1 device */
+    rt_hw_serial_register(&_serial0, "uart",
+                          RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX,
+                          uart);
+    rt_hw_interrupt_install(uart->irqno, rt_hw_uart_isr, &_serial0, "uart");
+
+    return 0;
+}