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rt-thread-official/bsp/imx/imx6ull-smart/drivers/drv_uart.c

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/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021-01-09 Lyons first version
*/
#include <rtconfig.h>
#ifdef RT_USING_SERIAL
#include "board.h"
#include "drv_uart.h"
#include "drv_common.h"
enum
{
#ifdef BSP_USING_UART1
eDevUart_UART1,
#endif
#ifdef BSP_USING_UART2
eDevUart_UART2,
#endif
#ifdef BSP_USING_UART3
eDevUart_UART3,
#endif
#ifdef BSP_USING_UART4
eDevUart_UART4,
#endif
#ifdef BSP_USING_UART5
eDevUart_UART5,
#endif
#ifdef BSP_USING_UART6
eDevUart_UART6,
#endif
#ifdef BSP_USING_UART7
eDevUart_UART7,
#endif
#ifdef BSP_USING_UART8
eDevUart_UART8,
#endif
eDevUart_Max,
};
_internal_rw struct imx_uart _s_uart[eDevUart_Max] = {
#ifdef BSP_USING_UART1
{
.name = "uart0",
.periph.paddr = IMX6ULL_UART1_BASE,
.irqno = UART1_IRQn,
.gpio = {
{IOMUXC_UART1_TX_DATA_UART1_TX, 0, 0x10B0},
{IOMUXC_UART1_RX_DATA_UART1_RX, 0, 0x10B0},
},
.flag = (RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX),
.param = RT_SERIAL_CONFIG_115200N81,
},
#endif
#ifdef BSP_USING_UART2
{
.name = "uart1",
.periph.paddr = IMX6ULL_UART2_BASE,
.irqno = UART2_IRQn,
.gpio = {
{IOMUXC_UART2_TX_DATA_UART2_TX, 0, 0x10B0},
{IOMUXC_UART2_RX_DATA_UART2_RX, 0, 0x10B0},
},
.flag = (RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX),
.param = RT_SERIAL_CONFIG_DEFAULT,
},
#endif
#ifdef BSP_USING_UART3
{
.name = "uart2",
.periph.paddr = IMX6ULL_UART3_BASE,
.irqno = UART3_IRQn,
.gpio = {
{IOMUXC_UART3_TX_DATA_UART3_TX, 0, 0x10B0},
{IOMUXC_UART3_RX_DATA_UART3_RX, 0, 0x10B0},
},
.flag = (RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX),
.param = RT_SERIAL_CONFIG_DEFAULT,
},
#endif
#ifdef BSP_USING_UART4
{
.name = "uart3",
.periph.paddr = IMX6ULL_UART4_BASE,
.irqno = UART4_IRQn,
.gpio = {
{IOMUXC_UART4_TX_DATA_UART4_TX, 0, 0x10B0},
{IOMUXC_UART4_RX_DATA_UART4_RX, 0, 0x10B0},
},
.flag = (RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX),
.param = RT_SERIAL_CONFIG_DEFAULT,
},
#endif
#ifdef BSP_USING_UART5
{
.name = "uart4",
.periph.paddr = IMX6ULL_UART5_BASE,
.irqno = UART5_IRQn,
.gpio = {
{IOMUXC_UART5_TX_DATA_UART5_TX, 0, 0x10B0},
{IOMUXC_UART5_RX_DATA_UART5_RX, 0, 0x10B0},
},
.flag = (RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX),
.param = RT_SERIAL_CONFIG_DEFAULT,
},
#endif
#ifdef BSP_USING_UART6
{
.name = "uart5",
.periph.paddr = IMX6ULL_UART6_BASE,
.irqno = UART6_IRQn,
.gpio = {
{IOMUXC_ENET2_RX_DATA1_UART6_TX, 0, 0x10B0},
{IOMUXC_ENET2_RX_DATA0_UART6_RX, 0, 0x10B0},
},
.flag = (RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX),
.param = RT_SERIAL_CONFIG_DEFAULT,
},
#endif
#ifdef BSP_USING_UART7
{
.name = "uart6",
.periph.paddr = IMX6ULL_UART7_BASE,
.irqno = UART7_IRQn,
.gpio = {
{IOMUXC_ENET2_TX_DATA0_UART7_TX, 0, 0x10B0},
{IOMUXC_ENET2_RX_EN_UART7_RX, 0, 0x10B0},
},
.flag = (RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX),
.param = RT_SERIAL_CONFIG_DEFAULT,
},
#endif
#ifdef BSP_USING_UART8
{
.name = "uart7",
.periph.paddr = IMX6ULL_UART8_BASE,
.irqno = UART8_IRQn,
.gpio = {
{IOMUXC_ENET2_TX_DATA1_UART8_TX, 0, 0x10B0},
{IOMUXC_ENET2_TX_EN_UART8_RX, 0, 0x10B0},
},
.flag = (RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX),
.param = RT_SERIAL_CONFIG_DEFAULT,
},
#endif
};
static void _uart_gpio_init( struct imx_uart *device )
{
for (int i=0; i<GET_ARRAY_NUM(device->gpio); i++)
{
imx6ull_gpio_init(&device->gpio[i]);
}
}
static rt_err_t _uart_ops_configure( struct rt_serial_device *dev,
struct serial_configure *cfg )
{
struct imx_uart *uart = RT_NULL;
UART_Type *periph = RT_NULL;
rt_uint32_t reg_value;
RT_ASSERT(RT_NULL != dev);
RT_ASSERT(RT_NULL != cfg);
uart = (struct imx_uart*)dev;
periph = (UART_Type*)uart->periph.vaddr;
_uart_gpio_init(uart);
periph->UCR1 &= ~UART_UCR1_UARTEN_MASK;
periph->UFCR &= ~UART_UFCR_RFDIV_MASK;
periph->UFCR |= UART_UFCR_RFDIV(5);
RT_ASSERT(cfg->baud_rate <= BAUD_RATE_921600);
periph->UBIR = UART_UBIR_INC(15);
periph->UBMR = UART_UBMR_MOD(HW_UART_BUS_CLOCK / cfg->baud_rate - 1);
reg_value = 0;
switch (cfg->data_bits)
{
case DATA_BITS_7:
reg_value |= UART_UCR2_WS(0);
break;
default:
reg_value |= UART_UCR2_WS(1);
break;
}
switch (cfg->stop_bits)
{
case STOP_BITS_2:
reg_value |= UART_UCR2_STPB(1);
break;
default:
reg_value |= UART_UCR2_STPB(0);
break;
}
switch (cfg->parity)
{
case PARITY_ODD:
reg_value |= UART_UCR2_PREN(1);
reg_value |= UART_UCR2_PROE(1);
break;
case PARITY_EVEN:
reg_value |= UART_UCR2_PREN(1);
reg_value |= UART_UCR2_PROE(0);
break;
default:
reg_value |= UART_UCR2_PREN(0);
reg_value |= UART_UCR2_PROE(0);
break;
}
periph->UCR3 |= UART_UCR3_RXDMUXSEL(1); //this bit should always be set!
periph->UCR2 |= reg_value | UART_UCR2_IRTS(1) | UART_UCR2_TXEN(1) | UART_UCR2_RXEN(1);
periph->UCR1 |= UART_UCR1_UARTEN(1);
return RT_EOK;
}
static rt_err_t _uart_ops_control( struct rt_serial_device *dev,
int cmd,
void *arg )
{
struct imx_uart *uart = RT_NULL;
UART_Type *periph = RT_NULL;
rt_err_t result;
RT_ASSERT(RT_NULL != dev);
uart = (struct imx_uart*)dev;
periph = (UART_Type*)uart->periph.vaddr;
result = RT_EOK;
switch (cmd)
{
case RT_DEVICE_CTRL_CLR_INT:
periph->UCR4 &= ~UART_UCR4_DREN_MASK;
periph->UCR4 |= UART_UCR4_DREN(0);
break;
case RT_DEVICE_CTRL_SET_INT:
periph->UCR4 |= UART_UCR4_DREN(1);
rt_hw_interrupt_umask(uart->irqno);
break;
default:
result = -RT_EINVAL;
break;
}
return result;
}
static int _uart_ops_putc( struct rt_serial_device *dev,
char ch )
{
struct imx_uart *uart = RT_NULL;
UART_Type *periph = RT_NULL;
RT_ASSERT(RT_NULL != dev);
uart = (struct imx_uart*)dev;
periph = (UART_Type*)uart->periph.vaddr;
while (0 == (periph->USR2 & UART_USR2_TXDC_MASK));
periph->UTXD = ch;
return 1;
}
static int _uart_ops_getc( struct rt_serial_device *dev )
{
struct imx_uart *uart = RT_NULL;
UART_Type *periph = RT_NULL;
int ch;
RT_ASSERT(RT_NULL != dev);
uart = (struct imx_uart*)dev;
periph = (UART_Type*)uart->periph.vaddr;
ch = (0 == (periph->USR2 & UART_USR2_RDR_MASK)) ? -1 : periph->URXD;
return ch;
}
_internal_ro struct rt_uart_ops _k_uart_ops =
{
_uart_ops_configure, /* configure */
_uart_ops_control, /* control */
_uart_ops_putc, /* putc */
_uart_ops_getc, /* getc */
RT_NULL, /* dma_transmit */
};
static void _uart_isr( int irqno, void* parameter )
{
struct rt_serial_device *serial;
rt_interrupt_enter();
serial = (struct rt_serial_device *)parameter;
rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
rt_interrupt_leave();
}
int rt_hw_uart_init(void)
{
for (int idx=0; idx<GET_ARRAY_NUM(_s_uart); idx++)
{
_s_uart[idx].periph.vaddr = platform_get_periph_vaddr(_s_uart[idx].periph.paddr);
_s_uart[idx].parent.ops = &_k_uart_ops;
rt_memcpy(&_s_uart[idx].parent.config, &_s_uart[idx].param, sizeof(struct serial_configure));
rt_hw_serial_register( &_s_uart[idx].parent,
_s_uart[idx].name,
_s_uart[idx].flag,
RT_NULL );
rt_hw_interrupt_install(_s_uart[idx].irqno, _uart_isr, &_s_uart[idx].parent, _s_uart[idx].name);
}
return RT_EOK;
}
INIT_BOARD_EXPORT(rt_hw_uart_init);
#endif //#ifdef RT_USING_SERIAL
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