c603aa8928
Extends the fix in commit 2175675199 to
all other mcux serial drivers. They were incorrectly checking if the
transmit buffer was empty when they should have been checking if the
transmission is complete.
Signed-off-by: Maureen Helm <maureen.helm@nxp.com>
337 lines
8.6 KiB
C
337 lines
8.6 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 <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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char *clock_name;
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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)(struct device *dev);
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#endif
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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(struct device *dev, unsigned char *c)
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{
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const struct mcux_lpsci_config *config = dev->config_info;
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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(struct device *dev, unsigned char c)
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{
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const struct mcux_lpsci_config *config = dev->config_info;
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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(struct device *dev)
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{
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const struct mcux_lpsci_config *config = dev->config_info;
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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(struct device *dev, 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_info;
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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(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_info;
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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(struct device *dev)
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{
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const struct mcux_lpsci_config *config = dev->config_info;
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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(struct device *dev)
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{
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const struct mcux_lpsci_config *config = dev->config_info;
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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(struct device *dev)
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{
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const struct mcux_lpsci_config *config = dev->config_info;
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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(struct device *dev)
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{
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const struct mcux_lpsci_config *config = dev->config_info;
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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(struct device *dev)
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{
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const struct mcux_lpsci_config *config = dev->config_info;
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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(struct device *dev)
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{
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const struct mcux_lpsci_config *config = dev->config_info;
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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(struct device *dev)
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{
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const struct mcux_lpsci_config *config = dev->config_info;
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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_ready(struct device *dev)
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{
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const struct mcux_lpsci_config *config = dev->config_info;
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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(struct device *dev)
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{
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const struct mcux_lpsci_config *config = dev->config_info;
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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(struct device *dev)
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{
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const struct mcux_lpsci_config *config = dev->config_info;
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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(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_ready(dev));
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}
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static int mcux_lpsci_irq_update(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(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->driver_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(void *arg)
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{
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struct device *dev = arg;
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struct mcux_lpsci_data *data = dev->driver_data;
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if (data->callback) {
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data->callback(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(struct device *dev)
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{
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const struct mcux_lpsci_config *config = dev->config_info;
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lpsci_config_t uart_config;
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struct device *clock_dev;
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uint32_t clock_freq;
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clock_dev = device_get_binding(config->clock_name);
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if (clock_dev == NULL) {
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return -EINVAL;
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}
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if (clock_control_get_rate(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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#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_ready,
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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(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_GET(uart_##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_name = DT_INST_CLOCKS_LABEL(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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IRQ_FUNC_INIT \
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}
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#define MCUX_LPSCI_INIT(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_AND_API_INIT(uart_##n, DT_INST_LABEL(n), \
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&mcux_lpsci_init, \
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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_KERNEL_INIT_PRIORITY_DEVICE, \
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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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