blob: 9f98d044a129e5c9dd8474912738eeffd6e65c72 [file] [log] [blame]
/*
* 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_t callback;
#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_t cb)
{
struct mcux_lpsci_data *data = dev->driver_data;
data->callback = cb;
}
static void mcux_lpsci_isr(void *arg)
{
struct device *dev = arg;
struct mcux_lpsci_data *data = dev->driver_data;
if (data->callback) {
data->callback(dev);
}
}
#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 */