blob: 59b868fbd8eb6b34fff5b73b01b2af8886a82722 [file] [log] [blame]
/*
* Copyright (c) 2017, NXP
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <errno.h>
#include <device.h>
#include <uart.h>
#include <fsl_lpuart.h>
#include <fsl_clock.h>
#include <soc.h>
struct mcux_lpuart_config {
LPUART_Type *base;
clock_name_t clock_source;
u32_t baud_rate;
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
void (*irq_config_func)(struct device *dev);
#endif
};
struct mcux_lpuart_data {
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
uart_irq_callback_t callback;
#endif
};
static int mcux_lpuart_poll_in(struct device *dev, unsigned char *c)
{
const struct mcux_lpuart_config *config = dev->config->config_info;
u32_t flags = LPUART_GetStatusFlags(config->base);
int ret = -1;
if (flags & kLPUART_RxDataRegFullFlag) {
*c = LPUART_ReadByte(config->base);
ret = 0;
}
return ret;
}
static unsigned char mcux_lpuart_poll_out(struct device *dev, unsigned char c)
{
const struct mcux_lpuart_config *config = dev->config->config_info;
while (!(LPUART_GetStatusFlags(config->base)
& kLPUART_TxDataRegEmptyFlag))
;
LPUART_WriteByte(config->base, c);
return c;
}
static int mcux_lpuart_err_check(struct device *dev)
{
const struct mcux_lpuart_config *config = dev->config->config_info;
u32_t flags = LPUART_GetStatusFlags(config->base);
int err = 0;
if (flags & kLPUART_RxOverrunFlag) {
err |= UART_ERROR_OVERRUN;
}
if (flags & kLPUART_ParityErrorFlag) {
err |= UART_ERROR_PARITY;
}
if (flags & kLPUART_FramingErrorFlag) {
err |= UART_ERROR_FRAMING;
}
LPUART_ClearStatusFlags(config->base, kLPUART_RxOverrunFlag |
kLPUART_ParityErrorFlag |
kLPUART_FramingErrorFlag);
return err;
}
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
static int mcux_lpuart_fifo_fill(struct device *dev, const u8_t *tx_data,
int len)
{
const struct mcux_lpuart_config *config = dev->config->config_info;
u8_t num_tx = 0;
while ((len - num_tx > 0) &&
(LPUART_GetStatusFlags(config->base)
& kLPUART_TxDataRegEmptyFlag)) {
LPUART_WriteByte(config->base, tx_data[num_tx++]);
}
return num_tx;
}
static int mcux_lpuart_fifo_read(struct device *dev, u8_t *rx_data,
const int len)
{
const struct mcux_lpuart_config *config = dev->config->config_info;
u8_t num_rx = 0;
while ((len - num_rx > 0) &&
(LPUART_GetStatusFlags(config->base)
& kLPUART_RxDataRegFullFlag)) {
rx_data[num_rx++] = LPUART_ReadByte(config->base);
}
return num_rx;
}
static void mcux_lpuart_irq_tx_enable(struct device *dev)
{
const struct mcux_lpuart_config *config = dev->config->config_info;
u32_t mask = kLPUART_TxDataRegEmptyInterruptEnable;
LPUART_EnableInterrupts(config->base, mask);
}
static void mcux_lpuart_irq_tx_disable(struct device *dev)
{
const struct mcux_lpuart_config *config = dev->config->config_info;
u32_t mask = kLPUART_TxDataRegEmptyInterruptEnable;
LPUART_DisableInterrupts(config->base, mask);
}
static int mcux_lpuart_irq_tx_complete(struct device *dev)
{
const struct mcux_lpuart_config *config = dev->config->config_info;
u32_t flags = LPUART_GetStatusFlags(config->base);
return (flags & kLPUART_TxDataRegEmptyFlag) != 0;
}
static int mcux_lpuart_irq_tx_ready(struct device *dev)
{
const struct mcux_lpuart_config *config = dev->config->config_info;
u32_t mask = kLPUART_TxDataRegEmptyInterruptEnable;
return (LPUART_GetEnabledInterrupts(config->base) & mask)
&& mcux_lpuart_irq_tx_complete(dev);
}
static void mcux_lpuart_irq_rx_enable(struct device *dev)
{
const struct mcux_lpuart_config *config = dev->config->config_info;
u32_t mask = kLPUART_RxDataRegFullInterruptEnable;
LPUART_EnableInterrupts(config->base, mask);
}
static void mcux_lpuart_irq_rx_disable(struct device *dev)
{
const struct mcux_lpuart_config *config = dev->config->config_info;
u32_t mask = kLPUART_RxDataRegFullInterruptEnable;
LPUART_DisableInterrupts(config->base, mask);
}
static int mcux_lpuart_irq_rx_full(struct device *dev)
{
const struct mcux_lpuart_config *config = dev->config->config_info;
u32_t flags = LPUART_GetStatusFlags(config->base);
return (flags & kLPUART_RxDataRegFullFlag) != 0;
}
static int mcux_lpuart_irq_rx_ready(struct device *dev)
{
const struct mcux_lpuart_config *config = dev->config->config_info;
u32_t mask = kLPUART_RxDataRegFullInterruptEnable;
return (LPUART_GetEnabledInterrupts(config->base) & mask)
&& mcux_lpuart_irq_rx_full(dev);
}
static void mcux_lpuart_irq_err_enable(struct device *dev)
{
const struct mcux_lpuart_config *config = dev->config->config_info;
u32_t mask = kLPUART_NoiseErrorInterruptEnable |
kLPUART_FramingErrorInterruptEnable |
kLPUART_ParityErrorInterruptEnable;
LPUART_EnableInterrupts(config->base, mask);
}
static void mcux_lpuart_irq_err_disable(struct device *dev)
{
const struct mcux_lpuart_config *config = dev->config->config_info;
u32_t mask = kLPUART_NoiseErrorInterruptEnable |
kLPUART_FramingErrorInterruptEnable |
kLPUART_ParityErrorInterruptEnable;
LPUART_DisableInterrupts(config->base, mask);
}
static int mcux_lpuart_irq_is_pending(struct device *dev)
{
return (mcux_lpuart_irq_tx_ready(dev)
|| mcux_lpuart_irq_rx_ready(dev));
}
static int mcux_lpuart_irq_update(struct device *dev)
{
return 1;
}
static void mcux_lpuart_irq_callback_set(struct device *dev,
uart_irq_callback_t cb)
{
struct mcux_lpuart_data *data = dev->driver_data;
data->callback = cb;
}
static void mcux_lpuart_isr(void *arg)
{
struct device *dev = arg;
struct mcux_lpuart_data *data = dev->driver_data;
if (data->callback) {
data->callback(dev);
}
}
#endif /* CONFIG_UART_INTERRUPT_DRIVEN */
static int mcux_lpuart_init(struct device *dev)
{
const struct mcux_lpuart_config *config = dev->config->config_info;
lpuart_config_t uart_config;
u32_t clock_freq;
clock_freq = CLOCK_GetFreq(config->clock_source);
LPUART_GetDefaultConfig(&uart_config);
uart_config.enableTx = true;
uart_config.enableRx = true;
uart_config.baudRate_Bps = config->baud_rate;
LPUART_Init(config->base, &uart_config, clock_freq);
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
config->irq_config_func(dev);
#endif
return 0;
}
static const struct uart_driver_api mcux_lpuart_driver_api = {
.poll_in = mcux_lpuart_poll_in,
.poll_out = mcux_lpuart_poll_out,
.err_check = mcux_lpuart_err_check,
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
.fifo_fill = mcux_lpuart_fifo_fill,
.fifo_read = mcux_lpuart_fifo_read,
.irq_tx_enable = mcux_lpuart_irq_tx_enable,
.irq_tx_disable = mcux_lpuart_irq_tx_disable,
.irq_tx_complete = mcux_lpuart_irq_tx_complete,
.irq_tx_ready = mcux_lpuart_irq_tx_ready,
.irq_rx_enable = mcux_lpuart_irq_rx_enable,
.irq_rx_disable = mcux_lpuart_irq_rx_disable,
.irq_rx_ready = mcux_lpuart_irq_rx_ready,
.irq_err_enable = mcux_lpuart_irq_err_enable,
.irq_err_disable = mcux_lpuart_irq_err_disable,
.irq_is_pending = mcux_lpuart_irq_is_pending,
.irq_update = mcux_lpuart_irq_update,
.irq_callback_set = mcux_lpuart_irq_callback_set,
#endif
};
#ifdef CONFIG_UART_MCUX_LPUART_0
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
static void mcux_lpuart_config_func_0(struct device *dev);
#endif
static const struct mcux_lpuart_config mcux_lpuart_0_config = {
.base = LPUART0,
.clock_source = LPUART0_CLK_SRC,
.baud_rate = CONFIG_UART_MCUX_LPUART_0_BAUD_RATE,
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
.irq_config_func = mcux_lpuart_config_func_0,
#endif
};
static struct mcux_lpuart_data mcux_lpuart_0_data;
DEVICE_AND_API_INIT(uart_0, CONFIG_UART_MCUX_LPUART_0_NAME,
&mcux_lpuart_init,
&mcux_lpuart_0_data, &mcux_lpuart_0_config,
PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEVICE,
&mcux_lpuart_driver_api);
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
static void mcux_lpuart_config_func_0(struct device *dev)
{
IRQ_CONNECT(CONFIG_UART_MCUX_LPUART_0_IRQ,
CONFIG_UART_MCUX_LPUART_0_IRQ_PRI,
mcux_lpuart_isr, DEVICE_GET(uart_0), 0);
irq_enable(CONFIG_UART_MCUX_LPUART_0_IRQ);
}
#endif
#endif /* CONFIG_UART_MCUX_LPUART_0 */