7e0eed9235
Usually, we want to operate only on "available" device
nodes ("available" means "status is okay and a matching binding is
found"), but that's not true in all cases.
Sometimes we want to operate on special nodes without matching
bindings, such as those describing memory.
To handle the distinction, change various additional devicetree APIs
making it clear that they operate only on available device nodes,
adjusting gen_defines and devicetree.h implementation details
accordingly:
- emit macros for all existing nodes in gen_defines.py, regardless
of status or matching binding
- rename DT_NUM_INST to DT_NUM_INST_STATUS_OKAY
- rename DT_NODE_HAS_COMPAT to DT_NODE_HAS_COMPAT_STATUS_OKAY
- rename DT_INST_FOREACH to DT_INST_FOREACH_STATUS_OKAY
- rename DT_ANY_INST_ON_BUS to DT_ANY_INST_ON_BUS_STATUS_OKAY
- rewrite DT_HAS_NODE_STATUS_OKAY in terms of a new DT_NODE_HAS_STATUS
- resurrect DT_HAS_NODE in the form of DT_NODE_EXISTS
- remove DT_COMPAT_ON_BUS as a public API
- use the new default_prop_types edtlib parameter
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
338 lines
8.8 KiB
C
338 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_lpc_usart
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/** @file
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* @brief USART driver for LPC54XXX and LPC55xxx families.
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*
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* Note:
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* - The driver is implemented for only one device, multiple instances
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* will be implemented in the future.
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*/
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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 <fsl_usart.h>
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#include <fsl_clock.h>
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#include <soc.h>
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#include <fsl_device_registers.h>
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struct mcux_flexcomm_config {
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USART_Type *base;
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u32_t clock_source;
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u32_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_flexcomm_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_flexcomm_poll_in(struct device *dev, unsigned char *c)
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{
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const struct mcux_flexcomm_config *config = dev->config_info;
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u32_t flags = USART_GetStatusFlags(config->base);
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int ret = -1;
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if (flags & kUSART_RxFifoFullFlag) {
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*c = USART_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_flexcomm_poll_out(struct device *dev,
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unsigned char c)
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{
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const struct mcux_flexcomm_config *config = dev->config_info;
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/* Wait until space is available in TX FIFO */
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while (!(USART_GetStatusFlags(config->base) & kUSART_TxFifoEmptyFlag)) {
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}
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USART_WriteByte(config->base, c);
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}
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static int mcux_flexcomm_err_check(struct device *dev)
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{
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const struct mcux_flexcomm_config *config = dev->config_info;
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u32_t flags = USART_GetStatusFlags(config->base);
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int err = 0;
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if (flags & kStatus_USART_RxRingBufferOverrun) {
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err |= UART_ERROR_OVERRUN;
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}
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if (flags & kStatus_USART_ParityError) {
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err |= UART_ERROR_PARITY;
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}
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if (flags & kStatus_USART_FramingError) {
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err |= UART_ERROR_FRAMING;
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}
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USART_ClearStatusFlags(config->base,
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kStatus_USART_RxRingBufferOverrun |
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kStatus_USART_ParityError |
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kStatus_USART_FramingError);
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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_flexcomm_fifo_fill(struct device *dev, const u8_t *tx_data,
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int len)
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{
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const struct mcux_flexcomm_config *config = dev->config_info;
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u8_t num_tx = 0U;
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while ((len - num_tx > 0) &&
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(USART_GetStatusFlags(config->base)
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& kUSART_TxFifoNotFullFlag)) {
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USART_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_flexcomm_fifo_read(struct device *dev, u8_t *rx_data,
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const int len)
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{
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const struct mcux_flexcomm_config *config = dev->config_info;
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u8_t num_rx = 0U;
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while ((len - num_rx > 0) &&
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(USART_GetStatusFlags(config->base)
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& kUSART_RxFifoNotEmptyFlag)) {
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rx_data[num_rx++] = USART_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_flexcomm_irq_tx_enable(struct device *dev)
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{
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const struct mcux_flexcomm_config *config = dev->config_info;
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u32_t mask = kUSART_TxLevelInterruptEnable;
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USART_EnableInterrupts(config->base, mask);
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}
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static void mcux_flexcomm_irq_tx_disable(struct device *dev)
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{
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const struct mcux_flexcomm_config *config = dev->config_info;
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u32_t mask = kUSART_TxLevelInterruptEnable;
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USART_DisableInterrupts(config->base, mask);
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}
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static int mcux_flexcomm_irq_tx_complete(struct device *dev)
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{
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const struct mcux_flexcomm_config *config = dev->config_info;
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u32_t flags = USART_GetStatusFlags(config->base);
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return (flags & kUSART_TxFifoEmptyFlag) != 0U;
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}
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static int mcux_flexcomm_irq_tx_ready(struct device *dev)
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{
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const struct mcux_flexcomm_config *config = dev->config_info;
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u32_t mask = kUSART_TxLevelInterruptEnable;
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return (USART_GetEnabledInterrupts(config->base) & mask)
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&& mcux_flexcomm_irq_tx_complete(dev);
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}
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static void mcux_flexcomm_irq_rx_enable(struct device *dev)
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{
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const struct mcux_flexcomm_config *config = dev->config_info;
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u32_t mask = kUSART_RxLevelInterruptEnable;
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USART_EnableInterrupts(config->base, mask);
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}
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static void mcux_flexcomm_irq_rx_disable(struct device *dev)
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{
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const struct mcux_flexcomm_config *config = dev->config_info;
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u32_t mask = kUSART_RxLevelInterruptEnable;
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USART_DisableInterrupts(config->base, mask);
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}
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static int mcux_flexcomm_irq_rx_full(struct device *dev)
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{
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const struct mcux_flexcomm_config *config = dev->config_info;
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u32_t flags = USART_GetStatusFlags(config->base);
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return (flags & kUSART_RxFifoNotEmptyFlag) != 0U;
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}
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static int mcux_flexcomm_irq_rx_ready(struct device *dev)
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{
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const struct mcux_flexcomm_config *config = dev->config_info;
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u32_t mask = kUSART_RxLevelInterruptEnable;
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return (USART_GetEnabledInterrupts(config->base) & mask)
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&& mcux_flexcomm_irq_rx_full(dev);
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}
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static void mcux_flexcomm_irq_err_enable(struct device *dev)
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{
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const struct mcux_flexcomm_config *config = dev->config_info;
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u32_t mask = kStatus_USART_NoiseError |
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kStatus_USART_FramingError |
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kStatus_USART_ParityError;
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USART_EnableInterrupts(config->base, mask);
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}
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static void mcux_flexcomm_irq_err_disable(struct device *dev)
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{
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const struct mcux_flexcomm_config *config = dev->config_info;
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u32_t mask = kStatus_USART_NoiseError |
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kStatus_USART_FramingError |
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kStatus_USART_ParityError;
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USART_DisableInterrupts(config->base, mask);
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}
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static int mcux_flexcomm_irq_is_pending(struct device *dev)
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{
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return (mcux_flexcomm_irq_tx_ready(dev)
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|| mcux_flexcomm_irq_rx_ready(dev));
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}
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static int mcux_flexcomm_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_flexcomm_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_flexcomm_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_flexcomm_isr(void *arg)
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{
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struct device *dev = arg;
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struct mcux_flexcomm_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_flexcomm_init(struct device *dev)
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{
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const struct mcux_flexcomm_config *config = dev->config_info;
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usart_config_t usart_config;
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u32_t clock_freq;
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clock_freq = CLOCK_GetFlexCommClkFreq(config->clock_source);
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USART_GetDefaultConfig(&usart_config);
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usart_config.enableTx = true;
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usart_config.enableRx = true;
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usart_config.baudRate_Bps = config->baud_rate;
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USART_Init(config->base, &usart_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_flexcomm_driver_api = {
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.poll_in = mcux_flexcomm_poll_in,
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.poll_out = mcux_flexcomm_poll_out,
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.err_check = mcux_flexcomm_err_check,
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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.fifo_fill = mcux_flexcomm_fifo_fill,
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.fifo_read = mcux_flexcomm_fifo_read,
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.irq_tx_enable = mcux_flexcomm_irq_tx_enable,
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.irq_tx_disable = mcux_flexcomm_irq_tx_disable,
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.irq_tx_complete = mcux_flexcomm_irq_tx_complete,
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.irq_tx_ready = mcux_flexcomm_irq_tx_ready,
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.irq_rx_enable = mcux_flexcomm_irq_rx_enable,
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.irq_rx_disable = mcux_flexcomm_irq_rx_disable,
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.irq_rx_ready = mcux_flexcomm_irq_rx_ready,
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.irq_err_enable = mcux_flexcomm_irq_err_enable,
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.irq_err_disable = mcux_flexcomm_irq_err_disable,
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.irq_is_pending = mcux_flexcomm_irq_is_pending,
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.irq_update = mcux_flexcomm_irq_update,
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.irq_callback_set = mcux_flexcomm_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 UART_MCUX_FLEXCOMM_CONFIG_FUNC(n) \
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static void mcux_flexcomm_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_flexcomm_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 UART_MCUX_FLEXCOMM_IRQ_CFG_FUNC_INIT(n) \
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.irq_config_func = mcux_flexcomm_config_func_##n
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#define UART_MCUX_FLEXCOMM_INIT_CFG(n) \
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UART_MCUX_FLEXCOMM_DECLARE_CFG(n, \
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UART_MCUX_FLEXCOMM_IRQ_CFG_FUNC_INIT(n))
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#else
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#define UART_MCUX_FLEXCOMM_CONFIG_FUNC(n)
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#define UART_MCUX_FLEXCOMM_IRQ_CFG_FUNC_INIT
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#define UART_MCUX_FLEXCOMM_INIT_CFG(n) \
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UART_MCUX_FLEXCOMM_DECLARE_CFG(n, UART_MCUX_FLEXCOMM_IRQ_CFG_FUNC_INIT)
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#endif
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#define UART_MCUX_FLEXCOMM_DECLARE_CFG(n, IRQ_FUNC_INIT) \
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static const struct mcux_flexcomm_config mcux_flexcomm_##n##_config = { \
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.base = (USART_Type *)DT_INST_REG_ADDR(n), \
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.clock_source = 0, \
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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 UART_MCUX_FLEXCOMM_INIT(n) \
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\
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static struct mcux_flexcomm_data mcux_flexcomm_##n##_data; \
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\
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static const struct mcux_flexcomm_config mcux_flexcomm_##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_flexcomm_init, \
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&mcux_flexcomm_##n##_data, \
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&mcux_flexcomm_##n##_config, \
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PRE_KERNEL_1, \
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CONFIG_KERNEL_INIT_PRIORITY_DEVICE, \
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&mcux_flexcomm_driver_api); \
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\
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UART_MCUX_FLEXCOMM_CONFIG_FUNC(n) \
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\
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UART_MCUX_FLEXCOMM_INIT_CFG(n);
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DT_INST_FOREACH_STATUS_OKAY(UART_MCUX_FLEXCOMM_INIT)
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