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drivers: uart_mcux: add UART set configuration function

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Add UART set configuration function.

Signed-off-by: Johann Fischer <j.fischer@phytec.de>
This commit is contained in:
Johann Fischer 2020-06-26 15:18:25 +02:00 • committed by Anas Nashif
commit 0a87f9359e
1 changed files with 89 additions and 26 deletions
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115
drivers/serial/uart_mcux.c
View file

@ -1,5 +1,6 @@
/*
* Copyright (c) 2017, NXP
* Copyright (c) 2020 PHYTEC Messtechnik GmbH
*
* SPDX-License-Identifier: Apache-2.0
*/
@ -17,8 +18,7 @@ struct uart_mcux_config {
UART_Type *base;
char *clock_name;
clock_control_subsys_t clock_subsys;
uint32_t baud_rate;
uint8_t hw_flow_control;
struct uart_config uart_cfg;
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
void (*irq_config_func)(struct device *dev);
#endif
@ -31,6 +31,80 @@ struct uart_mcux_data {
#endif
};
static int uart_mcux_configure(struct device *dev,
const struct uart_config *cfg)
{
const struct uart_mcux_config *config = dev->config_info;
uart_config_t uart_config;
struct device *clock_dev;
uint32_t clock_freq;
status_t retval;
clock_dev = device_get_binding(config->clock_name);
if (clock_dev == NULL) {
return -EINVAL;
}
if (clock_control_get_rate(clock_dev, config->clock_subsys,
&clock_freq)) {
return -EINVAL;
}
UART_GetDefaultConfig(&uart_config);
uart_config.enableTx = true;
uart_config.enableRx = true;
uart_config.baudRate_Bps = cfg->baudrate;
switch (cfg->stop_bits) {
case UART_CFG_STOP_BITS_1:
#if defined(FSL_FEATURE_UART_HAS_STOP_BIT_CONFIG_SUPPORT) && \
FSL_FEATURE_UART_HAS_STOP_BIT_CONFIG_SUPPORT
uart_config.stopBitCount = kUART_OneStopBit;
break;
case UART_CFG_STOP_BITS_2:
uart_config.stopBitCount = kUART_TwoStopBit;
#endif
break;
default:
return -ENOTSUP;
}
switch (cfg->flow_ctrl) {
case UART_CFG_FLOW_CTRL_NONE:
uart_config.enableRxRTS = false;
uart_config.enableTxCTS = false;
break;
case UART_CFG_FLOW_CTRL_RTS_CTS:
uart_config.enableRxRTS = true;
uart_config.enableTxCTS = true;
break;
default:
return -ENOTSUP;
}
switch (cfg->parity) {
case UART_CFG_PARITY_NONE:
uart_config.parityMode = kUART_ParityDisabled;
break;
case UART_CFG_PARITY_EVEN:
uart_config.parityMode = kUART_ParityEven;
break;
case UART_CFG_PARITY_ODD:
uart_config.parityMode = kUART_ParityOdd;
break;
default:
return -ENOTSUP;
}
retval = UART_Init(config->base, &uart_config, clock_freq);
if (retval != kStatus_Success) {
return -EINVAL;
}
return 0;
}
static int uart_mcux_poll_in(struct device *dev, unsigned char *c)
{
const struct uart_mcux_config *config = dev->config_info;
@ -232,31 +306,13 @@ static void uart_mcux_isr(void *arg)
static int uart_mcux_init(struct device *dev)
{
const struct uart_mcux_config *config = dev->config_info;
uart_config_t uart_config;
struct device *clock_dev;
uint32_t clock_freq;
int err;
clock_dev = device_get_binding(config->clock_name);
if (clock_dev == NULL) {
return -EINVAL;
err = uart_mcux_configure(dev, &config->uart_cfg);
if (err != 0) {
return err;
}
if (clock_control_get_rate(clock_dev, config->clock_subsys,
&clock_freq)) {
return -EINVAL;
}
UART_GetDefaultConfig(&uart_config);
uart_config.enableTx = true;
uart_config.enableRx = true;
if (config->hw_flow_control) {
uart_config.enableRxRTS = true;
uart_config.enableTxCTS = true;
}
uart_config.baudRate_Bps = config->baud_rate;
UART_Init(config->base, &uart_config, clock_freq);
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
config->irq_config_func(dev);
#endif
@ -268,6 +324,7 @@ static const struct uart_driver_api uart_mcux_driver_api = {
.poll_in = uart_mcux_poll_in,
.poll_out = uart_mcux_poll_out,
.err_check = uart_mcux_err_check,
.configure = uart_mcux_configure,
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
.fifo_fill = uart_mcux_fifo_fill,
.fifo_read = uart_mcux_fifo_read,
@ -291,8 +348,14 @@ static const struct uart_mcux_config uart_mcux_##n##_config = { \
.base = (UART_Type *)DT_INST_REG_ADDR(n), \
.clock_name = DT_INST_CLOCKS_LABEL(n), \
.clock_subsys = (clock_control_subsys_t)DT_INST_CLOCKS_CELL(n, name),\
.baud_rate = DT_INST_PROP(n, current_speed), \
.hw_flow_control = DT_INST_PROP(n, hw_flow_control), \
.uart_cfg = { \
.stop_bits = UART_CFG_STOP_BITS_1, \
.data_bits = UART_CFG_DATA_BITS_8, \
.baudrate = DT_INST_PROP(n, current_speed), \
.parity = UART_CFG_PARITY_NONE, \
.flow_ctrl = DT_INST_PROP(n, hw_flow_control) ? \
UART_CFG_FLOW_CTRL_RTS_CTS : UART_CFG_FLOW_CTRL_NONE,\
}, \
IRQ_FUNC_INIT \
}