324 lines
8.1 KiB
C
324 lines
8.1 KiB
C
/*
|
|
* Copyright (c) 2017, NXP
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
#include <errno.h>
|
|
#include <device.h>
|
|
#include <uart.h>
|
|
#include <clock_control.h>
|
|
#include <fsl_lpsci.h>
|
|
#include <soc.h>
|
|
|
|
struct mcux_lpsci_config {
|
|
UART0_Type *base;
|
|
char *clock_name;
|
|
clock_control_subsys_t clock_subsys;
|
|
u32_t baud_rate;
|
|
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
|
|
void (*irq_config_func)(struct device *dev);
|
|
#endif
|
|
};
|
|
|
|
struct mcux_lpsci_data {
|
|
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
|
|
uart_irq_callback_user_data_t callback;
|
|
void *cb_data;
|
|
#endif
|
|
};
|
|
|
|
static int mcux_lpsci_poll_in(struct device *dev, unsigned char *c)
|
|
{
|
|
const struct mcux_lpsci_config *config = dev->config->config_info;
|
|
u32_t flags = LPSCI_GetStatusFlags(config->base);
|
|
int ret = -1;
|
|
|
|
if (flags & kLPSCI_RxDataRegFullFlag) {
|
|
*c = LPSCI_ReadByte(config->base);
|
|
ret = 0;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static unsigned char mcux_lpsci_poll_out(struct device *dev, unsigned char c)
|
|
{
|
|
const struct mcux_lpsci_config *config = dev->config->config_info;
|
|
|
|
while (!(LPSCI_GetStatusFlags(config->base)
|
|
& kLPSCI_TxDataRegEmptyFlag))
|
|
;
|
|
|
|
LPSCI_WriteByte(config->base, c);
|
|
|
|
return c;
|
|
}
|
|
|
|
static int mcux_lpsci_err_check(struct device *dev)
|
|
{
|
|
const struct mcux_lpsci_config *config = dev->config->config_info;
|
|
u32_t flags = LPSCI_GetStatusFlags(config->base);
|
|
int err = 0;
|
|
|
|
if (flags & kLPSCI_RxOverrunFlag) {
|
|
err |= UART_ERROR_OVERRUN;
|
|
}
|
|
|
|
if (flags & kLPSCI_ParityErrorFlag) {
|
|
err |= UART_ERROR_PARITY;
|
|
}
|
|
|
|
if (flags & kLPSCI_FramingErrorFlag) {
|
|
err |= UART_ERROR_FRAMING;
|
|
}
|
|
|
|
LPSCI_ClearStatusFlags(config->base, kLPSCI_RxOverrunFlag |
|
|
kLPSCI_ParityErrorFlag |
|
|
kLPSCI_FramingErrorFlag);
|
|
|
|
return err;
|
|
}
|
|
|
|
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
|
|
static int mcux_lpsci_fifo_fill(struct device *dev, const u8_t *tx_data,
|
|
int len)
|
|
{
|
|
const struct mcux_lpsci_config *config = dev->config->config_info;
|
|
u8_t num_tx = 0;
|
|
|
|
while ((len - num_tx > 0) &&
|
|
(LPSCI_GetStatusFlags(config->base)
|
|
& kLPSCI_TxDataRegEmptyFlag)) {
|
|
|
|
LPSCI_WriteByte(config->base, tx_data[num_tx++]);
|
|
}
|
|
|
|
return num_tx;
|
|
}
|
|
|
|
static int mcux_lpsci_fifo_read(struct device *dev, u8_t *rx_data,
|
|
const int len)
|
|
{
|
|
const struct mcux_lpsci_config *config = dev->config->config_info;
|
|
u8_t num_rx = 0;
|
|
|
|
while ((len - num_rx > 0) &&
|
|
(LPSCI_GetStatusFlags(config->base)
|
|
& kLPSCI_RxDataRegFullFlag)) {
|
|
|
|
rx_data[num_rx++] = LPSCI_ReadByte(config->base);
|
|
}
|
|
|
|
return num_rx;
|
|
}
|
|
|
|
static void mcux_lpsci_irq_tx_enable(struct device *dev)
|
|
{
|
|
const struct mcux_lpsci_config *config = dev->config->config_info;
|
|
u32_t mask = kLPSCI_TxDataRegEmptyInterruptEnable;
|
|
|
|
LPSCI_EnableInterrupts(config->base, mask);
|
|
}
|
|
|
|
static void mcux_lpsci_irq_tx_disable(struct device *dev)
|
|
{
|
|
const struct mcux_lpsci_config *config = dev->config->config_info;
|
|
u32_t mask = kLPSCI_TxDataRegEmptyInterruptEnable;
|
|
|
|
LPSCI_DisableInterrupts(config->base, mask);
|
|
}
|
|
|
|
static int mcux_lpsci_irq_tx_complete(struct device *dev)
|
|
{
|
|
const struct mcux_lpsci_config *config = dev->config->config_info;
|
|
u32_t flags = LPSCI_GetStatusFlags(config->base);
|
|
|
|
return (flags & kLPSCI_TxDataRegEmptyFlag) != 0;
|
|
}
|
|
|
|
static int mcux_lpsci_irq_tx_ready(struct device *dev)
|
|
{
|
|
const struct mcux_lpsci_config *config = dev->config->config_info;
|
|
u32_t mask = kLPSCI_TxDataRegEmptyInterruptEnable;
|
|
|
|
return (LPSCI_GetEnabledInterrupts(config->base) & mask)
|
|
&& mcux_lpsci_irq_tx_complete(dev);
|
|
}
|
|
|
|
static void mcux_lpsci_irq_rx_enable(struct device *dev)
|
|
{
|
|
const struct mcux_lpsci_config *config = dev->config->config_info;
|
|
u32_t mask = kLPSCI_RxDataRegFullInterruptEnable;
|
|
|
|
LPSCI_EnableInterrupts(config->base, mask);
|
|
}
|
|
|
|
static void mcux_lpsci_irq_rx_disable(struct device *dev)
|
|
{
|
|
const struct mcux_lpsci_config *config = dev->config->config_info;
|
|
u32_t mask = kLPSCI_RxDataRegFullInterruptEnable;
|
|
|
|
LPSCI_DisableInterrupts(config->base, mask);
|
|
}
|
|
|
|
static int mcux_lpsci_irq_rx_full(struct device *dev)
|
|
{
|
|
const struct mcux_lpsci_config *config = dev->config->config_info;
|
|
u32_t flags = LPSCI_GetStatusFlags(config->base);
|
|
|
|
return (flags & kLPSCI_RxDataRegFullFlag) != 0;
|
|
}
|
|
|
|
static int mcux_lpsci_irq_rx_ready(struct device *dev)
|
|
{
|
|
const struct mcux_lpsci_config *config = dev->config->config_info;
|
|
u32_t mask = kLPSCI_RxDataRegFullInterruptEnable;
|
|
|
|
return (LPSCI_GetEnabledInterrupts(config->base) & mask)
|
|
&& mcux_lpsci_irq_rx_full(dev);
|
|
}
|
|
|
|
static void mcux_lpsci_irq_err_enable(struct device *dev)
|
|
{
|
|
const struct mcux_lpsci_config *config = dev->config->config_info;
|
|
u32_t mask = kLPSCI_NoiseErrorInterruptEnable |
|
|
kLPSCI_FramingErrorInterruptEnable |
|
|
kLPSCI_ParityErrorInterruptEnable;
|
|
|
|
LPSCI_EnableInterrupts(config->base, mask);
|
|
}
|
|
|
|
static void mcux_lpsci_irq_err_disable(struct device *dev)
|
|
{
|
|
const struct mcux_lpsci_config *config = dev->config->config_info;
|
|
u32_t mask = kLPSCI_NoiseErrorInterruptEnable |
|
|
kLPSCI_FramingErrorInterruptEnable |
|
|
kLPSCI_ParityErrorInterruptEnable;
|
|
|
|
LPSCI_DisableInterrupts(config->base, mask);
|
|
}
|
|
|
|
static int mcux_lpsci_irq_is_pending(struct device *dev)
|
|
{
|
|
return (mcux_lpsci_irq_tx_ready(dev)
|
|
|| mcux_lpsci_irq_rx_ready(dev));
|
|
}
|
|
|
|
static int mcux_lpsci_irq_update(struct device *dev)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static void mcux_lpsci_irq_callback_set(struct device *dev,
|
|
uart_irq_callback_user_data_t cb,
|
|
void *cb_data)
|
|
{
|
|
struct mcux_lpsci_data *data = dev->driver_data;
|
|
|
|
data->callback = cb;
|
|
data->cb_data = cb_data;
|
|
}
|
|
|
|
static void mcux_lpsci_isr(void *arg)
|
|
{
|
|
struct device *dev = arg;
|
|
struct mcux_lpsci_data *data = dev->driver_data;
|
|
|
|
if (data->callback) {
|
|
data->callback(data->cb_data);
|
|
}
|
|
}
|
|
#endif /* CONFIG_UART_INTERRUPT_DRIVEN */
|
|
|
|
static int mcux_lpsci_init(struct device *dev)
|
|
{
|
|
const struct mcux_lpsci_config *config = dev->config->config_info;
|
|
lpsci_config_t uart_config;
|
|
struct device *clock_dev;
|
|
u32_t clock_freq;
|
|
|
|
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;
|
|
}
|
|
|
|
LPSCI_GetDefaultConfig(&uart_config);
|
|
uart_config.enableTx = true;
|
|
uart_config.enableRx = true;
|
|
uart_config.baudRate_Bps = config->baud_rate;
|
|
|
|
LPSCI_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_lpsci_driver_api = {
|
|
.poll_in = mcux_lpsci_poll_in,
|
|
.poll_out = mcux_lpsci_poll_out,
|
|
.err_check = mcux_lpsci_err_check,
|
|
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
|
|
.fifo_fill = mcux_lpsci_fifo_fill,
|
|
.fifo_read = mcux_lpsci_fifo_read,
|
|
.irq_tx_enable = mcux_lpsci_irq_tx_enable,
|
|
.irq_tx_disable = mcux_lpsci_irq_tx_disable,
|
|
.irq_tx_complete = mcux_lpsci_irq_tx_complete,
|
|
.irq_tx_ready = mcux_lpsci_irq_tx_ready,
|
|
.irq_rx_enable = mcux_lpsci_irq_rx_enable,
|
|
.irq_rx_disable = mcux_lpsci_irq_rx_disable,
|
|
.irq_rx_ready = mcux_lpsci_irq_rx_ready,
|
|
.irq_err_enable = mcux_lpsci_irq_err_enable,
|
|
.irq_err_disable = mcux_lpsci_irq_err_disable,
|
|
.irq_is_pending = mcux_lpsci_irq_is_pending,
|
|
.irq_update = mcux_lpsci_irq_update,
|
|
.irq_callback_set = mcux_lpsci_irq_callback_set,
|
|
#endif
|
|
};
|
|
|
|
#ifdef CONFIG_UART_MCUX_LPSCI_0
|
|
|
|
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
|
|
static void mcux_lpsci_config_func_0(struct device *dev);
|
|
#endif
|
|
|
|
static const struct mcux_lpsci_config mcux_lpsci_0_config = {
|
|
.base = UART0,
|
|
.clock_name = CONFIG_UART_MCUX_LPSCI_0_CLOCK_NAME,
|
|
.clock_subsys =
|
|
(clock_control_subsys_t)CONFIG_UART_MCUX_LPSCI_0_CLOCK_SUBSYS,
|
|
.baud_rate = NXP_KINETIS_LPSCI_4006A000_CURRENT_SPEED,
|
|
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
|
|
.irq_config_func = mcux_lpsci_config_func_0,
|
|
#endif
|
|
};
|
|
|
|
static struct mcux_lpsci_data mcux_lpsci_0_data;
|
|
|
|
DEVICE_AND_API_INIT(uart_0, CONFIG_UART_MCUX_LPSCI_0_NAME,
|
|
&mcux_lpsci_init,
|
|
&mcux_lpsci_0_data, &mcux_lpsci_0_config,
|
|
PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEVICE,
|
|
&mcux_lpsci_driver_api);
|
|
|
|
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
|
|
static void mcux_lpsci_config_func_0(struct device *dev)
|
|
{
|
|
IRQ_CONNECT(NXP_KINETIS_LPSCI_4006A000_IRQ_0,
|
|
NXP_KINETIS_LPSCI_4006A000_IRQ_0_PRIORITY,
|
|
mcux_lpsci_isr, DEVICE_GET(uart_0), 0);
|
|
|
|
irq_enable(NXP_KINETIS_LPSCI_4006A000_IRQ_0);
|
|
}
|
|
#endif
|
|
|
|
#endif /* CONFIG_UART_MCUX_LPSCI_0 */
|