blob: 09ae22c906ee3af6fa32df6403ce9e641f32baac [file] [log] [blame]
/*
* Copyright (c) 2019, Manivannan Sadhasivam <mani@kernel.org>
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT nxp_imx_iuart
#include <zephyr/device.h>
#include <zephyr/drivers/uart.h>
#include <zephyr/drivers/clock_control.h>
#include <zephyr/irq.h>
#include <errno.h>
#include <fsl_uart.h>
#include <zephyr/drivers/pinctrl.h>
struct mcux_iuart_config {
UART_Type *base;
const struct device *clock_dev;
clock_control_subsys_t clock_subsys;
uint32_t baud_rate;
const struct pinctrl_dev_config *pincfg;
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
void (*irq_config_func)(const struct device *dev);
#endif
};
struct mcux_iuart_data {
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
uart_irq_callback_user_data_t callback;
void *cb_data;
#endif
};
static int mcux_iuart_poll_in(const struct device *dev, unsigned char *c)
{
const struct mcux_iuart_config *config = dev->config;
int ret = -1;
if (UART_GetStatusFlag(config->base, kUART_RxDataReadyFlag)) {
*c = UART_ReadByte(config->base);
ret = 0;
}
return ret;
}
static void mcux_iuart_poll_out(const struct device *dev, unsigned char c)
{
const struct mcux_iuart_config *config = dev->config;
while (!(UART_GetStatusFlag(config->base, kUART_TxReadyFlag))) {
}
UART_WriteByte(config->base, c);
}
static int mcux_iuart_err_check(const struct device *dev)
{
const struct mcux_iuart_config *config = dev->config;
int err = 0;
if (UART_GetStatusFlag(config->base, kUART_RxOverrunFlag)) {
err |= UART_ERROR_OVERRUN;
UART_ClearStatusFlag(config->base, kUART_RxOverrunFlag);
}
if (UART_GetStatusFlag(config->base, kUART_ParityErrorFlag)) {
err |= UART_ERROR_PARITY;
UART_ClearStatusFlag(config->base, kUART_ParityErrorFlag);
}
if (UART_GetStatusFlag(config->base, kUART_FrameErrorFlag)) {
err |= UART_ERROR_FRAMING;
UART_ClearStatusFlag(config->base, kUART_FrameErrorFlag);
}
return err;
}
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
static int mcux_iuart_fifo_fill(const struct device *dev,
const uint8_t *tx_data,
int len)
{
const struct mcux_iuart_config *config = dev->config;
uint8_t num_tx = 0U;
while ((len - num_tx > 0) &&
(UART_GetStatusFlag(config->base, kUART_TxEmptyFlag))) {
UART_WriteByte(config->base, tx_data[num_tx++]);
}
return num_tx;
}
static int mcux_iuart_fifo_read(const struct device *dev, uint8_t *rx_data,
const int len)
{
const struct mcux_iuart_config *config = dev->config;
uint8_t num_rx = 0U;
while ((len - num_rx > 0) &&
(UART_GetStatusFlag(config->base, kUART_RxDataReadyFlag))) {
rx_data[num_rx++] = UART_ReadByte(config->base);
}
return num_rx;
}
static void mcux_iuart_irq_tx_enable(const struct device *dev)
{
const struct mcux_iuart_config *config = dev->config;
UART_EnableInterrupts(config->base, kUART_TxEmptyEnable);
}
static void mcux_iuart_irq_tx_disable(const struct device *dev)
{
const struct mcux_iuart_config *config = dev->config;
UART_DisableInterrupts(config->base, kUART_TxEmptyEnable);
}
static int mcux_iuart_irq_tx_complete(const struct device *dev)
{
const struct mcux_iuart_config *config = dev->config;
return (UART_GetStatusFlag(config->base, kUART_TxEmptyFlag)) != 0U;
}
static int mcux_iuart_irq_tx_ready(const struct device *dev)
{
const struct mcux_iuart_config *config = dev->config;
uint32_t mask = kUART_TxEmptyEnable;
return (UART_GetEnabledInterrupts(config->base) & mask)
&& mcux_iuart_irq_tx_complete(dev);
}
static void mcux_iuart_irq_rx_enable(const struct device *dev)
{
const struct mcux_iuart_config *config = dev->config;
uint32_t mask = kUART_RxDataReadyEnable;
UART_EnableInterrupts(config->base, mask);
}
static void mcux_iuart_irq_rx_disable(const struct device *dev)
{
const struct mcux_iuart_config *config = dev->config;
uint32_t mask = kUART_RxDataReadyEnable;
UART_DisableInterrupts(config->base, mask);
}
static int mcux_iuart_irq_rx_full(const struct device *dev)
{
const struct mcux_iuart_config *config = dev->config;
return (UART_GetStatusFlag(config->base, kUART_RxDataReadyFlag)) != 0U;
}
static int mcux_iuart_irq_rx_pending(const struct device *dev)
{
const struct mcux_iuart_config *config = dev->config;
uint32_t mask = kUART_RxDataReadyEnable;
return (UART_GetEnabledInterrupts(config->base) & mask)
&& mcux_iuart_irq_rx_full(dev);
}
static void mcux_iuart_irq_err_enable(const struct device *dev)
{
const struct mcux_iuart_config *config = dev->config;
uint32_t mask = kUART_RxOverrunEnable | kUART_ParityErrorEnable |
kUART_FrameErrorEnable;
UART_EnableInterrupts(config->base, mask);
}
static void mcux_iuart_irq_err_disable(const struct device *dev)
{
const struct mcux_iuart_config *config = dev->config;
uint32_t mask = kUART_RxOverrunEnable | kUART_ParityErrorEnable |
kUART_FrameErrorEnable;
UART_DisableInterrupts(config->base, mask);
}
static int mcux_iuart_irq_is_pending(const struct device *dev)
{
return mcux_iuart_irq_tx_ready(dev) || mcux_iuart_irq_rx_pending(dev);
}
static int mcux_iuart_irq_update(const struct device *dev)
{
return 1;
}
static void mcux_iuart_irq_callback_set(const struct device *dev,
uart_irq_callback_user_data_t cb,
void *cb_data)
{
struct mcux_iuart_data *data = dev->data;
data->callback = cb;
data->cb_data = cb_data;
}
static void mcux_iuart_isr(const struct device *dev)
{
struct mcux_iuart_data *data = dev->data;
if (data->callback) {
data->callback(dev, data->cb_data);
}
}
#endif /* CONFIG_UART_INTERRUPT_DRIVEN */
static int mcux_iuart_init(const struct device *dev)
{
const struct mcux_iuart_config *config = dev->config;
uart_config_t uart_config;
uint32_t clock_freq;
int err;
if (!device_is_ready(config->clock_dev)) {
return -ENODEV;
}
if (clock_control_get_rate(config->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 = config->baud_rate;
clock_control_on(config->clock_dev, config->clock_subsys);
UART_Init(config->base, &uart_config, clock_freq);
err = pinctrl_apply_state(config->pincfg, PINCTRL_STATE_DEFAULT);
if (err) {
clock_control_off(config->clock_dev, config->clock_subsys);
return err;
}
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
config->irq_config_func(dev);
#endif
return 0;
}
static const struct uart_driver_api mcux_iuart_driver_api = {
.poll_in = mcux_iuart_poll_in,
.poll_out = mcux_iuart_poll_out,
.err_check = mcux_iuart_err_check,
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
.fifo_fill = mcux_iuart_fifo_fill,
.fifo_read = mcux_iuart_fifo_read,
.irq_tx_enable = mcux_iuart_irq_tx_enable,
.irq_tx_disable = mcux_iuart_irq_tx_disable,
.irq_tx_complete = mcux_iuart_irq_tx_complete,
.irq_tx_ready = mcux_iuart_irq_tx_ready,
.irq_rx_enable = mcux_iuart_irq_rx_enable,
.irq_rx_disable = mcux_iuart_irq_rx_disable,
.irq_rx_ready = mcux_iuart_irq_rx_full,
.irq_err_enable = mcux_iuart_irq_err_enable,
.irq_err_disable = mcux_iuart_irq_err_disable,
.irq_is_pending = mcux_iuart_irq_is_pending,
.irq_update = mcux_iuart_irq_update,
.irq_callback_set = mcux_iuart_irq_callback_set,
#endif
};
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
#define MCUX_IUART_IRQ_INIT(n, i) \
do { \
IRQ_CONNECT(DT_INST_IRQ_BY_IDX(n, i, irq), \
DT_INST_IRQ_BY_IDX(n, i, priority), \
mcux_iuart_isr, DEVICE_DT_INST_GET(n), 0); \
\
irq_enable(DT_INST_IRQ_BY_IDX(n, i, irq)); \
} while (false)
#define IUART_MCUX_CONFIG_FUNC(n) \
static void mcux_iuart_config_func_##n(const struct device *dev) \
{ \
MCUX_IUART_IRQ_INIT(n, 0); \
\
IF_ENABLED(DT_INST_IRQ_HAS_IDX(n, 1), \
(MCUX_IUART_IRQ_INIT(n, 1);)) \
}
#define IUART_MCUX_IRQ_CFG_FUNC_INIT(n) \
.irq_config_func = mcux_iuart_config_func_##n
#define IUART_MCUX_INIT_CFG(n) \
IUART_MCUX_DECLARE_CFG(n, IUART_MCUX_IRQ_CFG_FUNC_INIT(n))
#else
#define IUART_MCUX_CONFIG_FUNC(n)
#define IUART_MCUX_IRQ_CFG_FUNC_INIT
#define IUART_MCUX_INIT_CFG(n) \
IUART_MCUX_DECLARE_CFG(n, IUART_MCUX_IRQ_CFG_FUNC_INIT)
#endif
#define IUART_MCUX_DECLARE_CFG(n, IRQ_FUNC_INIT) \
static const struct mcux_iuart_config mcux_iuart_##n##_config = { \
.base = (UART_Type *) DT_INST_REG_ADDR(n), \
.clock_dev = DEVICE_DT_GET(DT_INST_CLOCKS_CTLR(n)), \
.clock_subsys = (clock_control_subsys_t)DT_INST_CLOCKS_CELL(n, name),\
.baud_rate = DT_INST_PROP(n, current_speed), \
.pincfg = PINCTRL_DT_INST_DEV_CONFIG_GET(n), \
IRQ_FUNC_INIT \
}
#define IUART_MCUX_INIT(n) \
\
static struct mcux_iuart_data mcux_iuart_##n##_data; \
\
static const struct mcux_iuart_config mcux_iuart_##n##_config;\
\
DEVICE_DT_INST_DEFINE(n, \
&mcux_iuart_init, \
NULL, \
&mcux_iuart_##n##_data, \
&mcux_iuart_##n##_config, \
PRE_KERNEL_1, \
CONFIG_SERIAL_INIT_PRIORITY, \
&mcux_iuart_driver_api); \
\
PINCTRL_DT_INST_DEFINE(n); \
\
IUART_MCUX_CONFIG_FUNC(n) \
\
IUART_MCUX_INIT_CFG(n);
DT_INST_FOREACH_STATUS_OKAY(IUART_MCUX_INIT)