342 lines
8.8 KiB
C
342 lines
8.8 KiB
C
/*
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* Copyright (c) 2017, NXP
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#define DT_DRV_COMPAT nxp_kinetis_lpsci
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#include <errno.h>
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#include <device.h>
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#include <drivers/uart.h>
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#include <drivers/clock_control.h>
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#include <drivers/pinctrl.h>
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#include <fsl_lpsci.h>
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#include <soc.h>
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struct mcux_lpsci_config {
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UART0_Type *base;
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const struct device *clock_dev;
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clock_control_subsys_t clock_subsys;
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uint32_t baud_rate;
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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void (*irq_config_func)(const struct device *dev);
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#endif
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const struct pinctrl_dev_config *pincfg;
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};
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struct mcux_lpsci_data {
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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uart_irq_callback_user_data_t callback;
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void *cb_data;
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#endif
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};
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static int mcux_lpsci_poll_in(const struct device *dev, unsigned char *c)
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{
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const struct mcux_lpsci_config *config = dev->config;
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uint32_t flags = LPSCI_GetStatusFlags(config->base);
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int ret = -1;
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if (flags & kLPSCI_RxDataRegFullFlag) {
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*c = LPSCI_ReadByte(config->base);
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ret = 0;
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}
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return ret;
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}
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static void mcux_lpsci_poll_out(const struct device *dev, unsigned char c)
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{
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const struct mcux_lpsci_config *config = dev->config;
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while (!(LPSCI_GetStatusFlags(config->base)
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& kLPSCI_TxDataRegEmptyFlag)) {
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}
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LPSCI_WriteByte(config->base, c);
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}
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static int mcux_lpsci_err_check(const struct device *dev)
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{
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const struct mcux_lpsci_config *config = dev->config;
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uint32_t flags = LPSCI_GetStatusFlags(config->base);
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int err = 0;
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if (flags & kLPSCI_RxOverrunFlag) {
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err |= UART_ERROR_OVERRUN;
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}
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if (flags & kLPSCI_ParityErrorFlag) {
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err |= UART_ERROR_PARITY;
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}
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if (flags & kLPSCI_FramingErrorFlag) {
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err |= UART_ERROR_FRAMING;
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}
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LPSCI_ClearStatusFlags(config->base, kLPSCI_RxOverrunFlag |
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kLPSCI_ParityErrorFlag |
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kLPSCI_FramingErrorFlag);
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return err;
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}
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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static int mcux_lpsci_fifo_fill(const struct device *dev,
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const uint8_t *tx_data,
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int len)
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{
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const struct mcux_lpsci_config *config = dev->config;
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uint8_t num_tx = 0U;
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while ((len - num_tx > 0) &&
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(LPSCI_GetStatusFlags(config->base)
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& kLPSCI_TxDataRegEmptyFlag)) {
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LPSCI_WriteByte(config->base, tx_data[num_tx++]);
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}
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return num_tx;
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}
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static int mcux_lpsci_fifo_read(const struct device *dev, uint8_t *rx_data,
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const int len)
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{
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const struct mcux_lpsci_config *config = dev->config;
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uint8_t num_rx = 0U;
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while ((len - num_rx > 0) &&
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(LPSCI_GetStatusFlags(config->base)
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& kLPSCI_RxDataRegFullFlag)) {
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rx_data[num_rx++] = LPSCI_ReadByte(config->base);
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}
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return num_rx;
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}
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static void mcux_lpsci_irq_tx_enable(const struct device *dev)
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{
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const struct mcux_lpsci_config *config = dev->config;
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uint32_t mask = kLPSCI_TxDataRegEmptyInterruptEnable;
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LPSCI_EnableInterrupts(config->base, mask);
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}
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static void mcux_lpsci_irq_tx_disable(const struct device *dev)
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{
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const struct mcux_lpsci_config *config = dev->config;
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uint32_t mask = kLPSCI_TxDataRegEmptyInterruptEnable;
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LPSCI_DisableInterrupts(config->base, mask);
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}
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static int mcux_lpsci_irq_tx_complete(const struct device *dev)
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{
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const struct mcux_lpsci_config *config = dev->config;
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uint32_t flags = LPSCI_GetStatusFlags(config->base);
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return (flags & kLPSCI_TransmissionCompleteFlag) != 0U;
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}
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static int mcux_lpsci_irq_tx_ready(const struct device *dev)
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{
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const struct mcux_lpsci_config *config = dev->config;
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uint32_t mask = kLPSCI_TxDataRegEmptyInterruptEnable;
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uint32_t flags = LPSCI_GetStatusFlags(config->base);
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return (LPSCI_GetEnabledInterrupts(config->base) & mask)
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&& (flags & kLPSCI_TxDataRegEmptyFlag);
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}
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static void mcux_lpsci_irq_rx_enable(const struct device *dev)
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{
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const struct mcux_lpsci_config *config = dev->config;
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uint32_t mask = kLPSCI_RxDataRegFullInterruptEnable;
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LPSCI_EnableInterrupts(config->base, mask);
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}
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static void mcux_lpsci_irq_rx_disable(const struct device *dev)
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{
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const struct mcux_lpsci_config *config = dev->config;
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uint32_t mask = kLPSCI_RxDataRegFullInterruptEnable;
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LPSCI_DisableInterrupts(config->base, mask);
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}
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static int mcux_lpsci_irq_rx_full(const struct device *dev)
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{
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const struct mcux_lpsci_config *config = dev->config;
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uint32_t flags = LPSCI_GetStatusFlags(config->base);
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return (flags & kLPSCI_RxDataRegFullFlag) != 0U;
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}
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static int mcux_lpsci_irq_rx_pending(const struct device *dev)
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{
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const struct mcux_lpsci_config *config = dev->config;
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uint32_t mask = kLPSCI_RxDataRegFullInterruptEnable;
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return (LPSCI_GetEnabledInterrupts(config->base) & mask)
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&& mcux_lpsci_irq_rx_full(dev);
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}
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static void mcux_lpsci_irq_err_enable(const struct device *dev)
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{
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const struct mcux_lpsci_config *config = dev->config;
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uint32_t mask = kLPSCI_NoiseErrorInterruptEnable |
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kLPSCI_FramingErrorInterruptEnable |
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kLPSCI_ParityErrorInterruptEnable;
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LPSCI_EnableInterrupts(config->base, mask);
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}
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static void mcux_lpsci_irq_err_disable(const struct device *dev)
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{
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const struct mcux_lpsci_config *config = dev->config;
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uint32_t mask = kLPSCI_NoiseErrorInterruptEnable |
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kLPSCI_FramingErrorInterruptEnable |
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kLPSCI_ParityErrorInterruptEnable;
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LPSCI_DisableInterrupts(config->base, mask);
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}
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static int mcux_lpsci_irq_is_pending(const struct device *dev)
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{
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return (mcux_lpsci_irq_tx_ready(dev)
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|| mcux_lpsci_irq_rx_pending(dev));
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}
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static int mcux_lpsci_irq_update(const struct device *dev)
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{
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return 1;
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}
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static void mcux_lpsci_irq_callback_set(const struct device *dev,
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uart_irq_callback_user_data_t cb,
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void *cb_data)
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{
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struct mcux_lpsci_data *data = dev->data;
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data->callback = cb;
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data->cb_data = cb_data;
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}
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static void mcux_lpsci_isr(const struct device *dev)
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{
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struct mcux_lpsci_data *data = dev->data;
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if (data->callback) {
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data->callback(dev, data->cb_data);
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}
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}
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#endif /* CONFIG_UART_INTERRUPT_DRIVEN */
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static int mcux_lpsci_init(const struct device *dev)
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{
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const struct mcux_lpsci_config *config = dev->config;
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lpsci_config_t uart_config;
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uint32_t clock_freq;
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int err;
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if (clock_control_get_rate(config->clock_dev, config->clock_subsys,
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&clock_freq)) {
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return -EINVAL;
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}
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LPSCI_GetDefaultConfig(&uart_config);
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uart_config.enableTx = true;
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uart_config.enableRx = true;
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uart_config.baudRate_Bps = config->baud_rate;
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LPSCI_Init(config->base, &uart_config, clock_freq);
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err = pinctrl_apply_state(config->pincfg, PINCTRL_STATE_DEFAULT);
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if (err < 0) {
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return err;
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}
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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config->irq_config_func(dev);
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#endif
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return 0;
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}
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static const struct uart_driver_api mcux_lpsci_driver_api = {
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.poll_in = mcux_lpsci_poll_in,
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.poll_out = mcux_lpsci_poll_out,
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.err_check = mcux_lpsci_err_check,
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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.fifo_fill = mcux_lpsci_fifo_fill,
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.fifo_read = mcux_lpsci_fifo_read,
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.irq_tx_enable = mcux_lpsci_irq_tx_enable,
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.irq_tx_disable = mcux_lpsci_irq_tx_disable,
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.irq_tx_complete = mcux_lpsci_irq_tx_complete,
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.irq_tx_ready = mcux_lpsci_irq_tx_ready,
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.irq_rx_enable = mcux_lpsci_irq_rx_enable,
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.irq_rx_disable = mcux_lpsci_irq_rx_disable,
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.irq_rx_ready = mcux_lpsci_irq_rx_full,
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.irq_err_enable = mcux_lpsci_irq_err_enable,
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.irq_err_disable = mcux_lpsci_irq_err_disable,
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.irq_is_pending = mcux_lpsci_irq_is_pending,
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.irq_update = mcux_lpsci_irq_update,
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.irq_callback_set = mcux_lpsci_irq_callback_set,
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#endif
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};
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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#define MCUX_LPSCI_CONFIG_FUNC(n) \
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static void mcux_lpsci_config_func_##n(const struct device *dev) \
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{ \
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IRQ_CONNECT(DT_INST_IRQN(n), \
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DT_INST_IRQ(n, priority), \
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mcux_lpsci_isr, DEVICE_DT_INST_GET(n), 0); \
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\
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irq_enable(DT_INST_IRQN(n)); \
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}
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#define MCUX_LPSCI_IRQ_CFG_FUNC_INIT(n) \
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.irq_config_func = mcux_lpsci_config_func_##n
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#define MCUX_LPSCI_INIT_CFG(n) \
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MCUX_LPSCI_DECLARE_CFG(n, MCUX_LPSCI_IRQ_CFG_FUNC_INIT(n))
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#else
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#define MCUX_LPSCI_CONFIG_FUNC(n)
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#define MCUX_LPSCI_IRQ_CFG_FUNC_INIT
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#define MCUX_LPSCI_INIT_CFG(n) \
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MCUX_LPSCI_DECLARE_CFG(n, MCUX_LPSCI_IRQ_CFG_FUNC_INIT)
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#endif
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#define MCUX_LPSCI_DECLARE_CFG(n, IRQ_FUNC_INIT) \
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static const struct mcux_lpsci_config mcux_lpsci_##n##_config = { \
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.base = (UART0_Type *)DT_INST_REG_ADDR(n), \
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.clock_dev = DEVICE_DT_GET(DT_INST_CLOCKS_CTLR(n)), \
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.clock_subsys = (clock_control_subsys_t)DT_INST_CLOCKS_CELL(n, name),\
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.baud_rate = DT_INST_PROP(n, current_speed), \
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.pincfg = PINCTRL_DT_INST_DEV_CONFIG_GET(n), \
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IRQ_FUNC_INIT \
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}
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#define MCUX_LPSCI_INIT(n) \
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PINCTRL_DT_INST_DEFINE(n); \
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\
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static struct mcux_lpsci_data mcux_lpsci_##n##_data; \
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\
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static const struct mcux_lpsci_config mcux_lpsci_##n##_config; \
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\
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DEVICE_DT_INST_DEFINE(n, \
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&mcux_lpsci_init, \
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NULL, \
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&mcux_lpsci_##n##_data, \
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&mcux_lpsci_##n##_config, \
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PRE_KERNEL_1, \
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CONFIG_SERIAL_INIT_PRIORITY, \
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&mcux_lpsci_driver_api); \
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\
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MCUX_LPSCI_CONFIG_FUNC(n) \
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\
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MCUX_LPSCI_INIT_CFG(n);
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DT_INST_FOREACH_STATUS_OKAY(MCUX_LPSCI_INIT)
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