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>
344 lines
8.9 KiB
C
344 lines
8.9 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_lpuart
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#include <errno.h>
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#include <soc.h>
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#include <fsl_lpuart.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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struct mcux_lpuart_config {
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LPUART_Type *base;
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char *clock_name;
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clock_control_subsys_t clock_subsys;
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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_lpuart_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_lpuart_poll_in(struct device *dev, unsigned char *c)
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{
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const struct mcux_lpuart_config *config = dev->config_info;
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u32_t flags = LPUART_GetStatusFlags(config->base);
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int ret = -1;
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if (flags & kLPUART_RxDataRegFullFlag) {
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*c = LPUART_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_lpuart_poll_out(struct device *dev, unsigned char c)
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{
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const struct mcux_lpuart_config *config = dev->config_info;
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while (!(LPUART_GetStatusFlags(config->base)
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& kLPUART_TxDataRegEmptyFlag)) {
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}
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LPUART_WriteByte(config->base, c);
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}
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static int mcux_lpuart_err_check(struct device *dev)
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{
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const struct mcux_lpuart_config *config = dev->config_info;
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u32_t flags = LPUART_GetStatusFlags(config->base);
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int err = 0;
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if (flags & kLPUART_RxOverrunFlag) {
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err |= UART_ERROR_OVERRUN;
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}
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if (flags & kLPUART_ParityErrorFlag) {
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err |= UART_ERROR_PARITY;
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}
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if (flags & kLPUART_FramingErrorFlag) {
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err |= UART_ERROR_FRAMING;
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}
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LPUART_ClearStatusFlags(config->base, kLPUART_RxOverrunFlag |
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kLPUART_ParityErrorFlag |
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kLPUART_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_lpuart_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_lpuart_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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(LPUART_GetStatusFlags(config->base)
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& kLPUART_TxDataRegEmptyFlag)) {
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LPUART_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_lpuart_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_lpuart_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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(LPUART_GetStatusFlags(config->base)
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& kLPUART_RxDataRegFullFlag)) {
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rx_data[num_rx++] = LPUART_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_lpuart_irq_tx_enable(struct device *dev)
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{
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const struct mcux_lpuart_config *config = dev->config_info;
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u32_t mask = kLPUART_TxDataRegEmptyInterruptEnable;
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LPUART_EnableInterrupts(config->base, mask);
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}
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static void mcux_lpuart_irq_tx_disable(struct device *dev)
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{
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const struct mcux_lpuart_config *config = dev->config_info;
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u32_t mask = kLPUART_TxDataRegEmptyInterruptEnable;
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LPUART_DisableInterrupts(config->base, mask);
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}
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static int mcux_lpuart_irq_tx_complete(struct device *dev)
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{
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const struct mcux_lpuart_config *config = dev->config_info;
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u32_t flags = LPUART_GetStatusFlags(config->base);
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return (flags & kLPUART_TxDataRegEmptyFlag) != 0U;
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}
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static int mcux_lpuart_irq_tx_ready(struct device *dev)
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{
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const struct mcux_lpuart_config *config = dev->config_info;
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u32_t mask = kLPUART_TxDataRegEmptyInterruptEnable;
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return (LPUART_GetEnabledInterrupts(config->base) & mask)
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&& mcux_lpuart_irq_tx_complete(dev);
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}
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static void mcux_lpuart_irq_rx_enable(struct device *dev)
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{
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const struct mcux_lpuart_config *config = dev->config_info;
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u32_t mask = kLPUART_RxDataRegFullInterruptEnable;
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LPUART_EnableInterrupts(config->base, mask);
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}
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static void mcux_lpuart_irq_rx_disable(struct device *dev)
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{
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const struct mcux_lpuart_config *config = dev->config_info;
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u32_t mask = kLPUART_RxDataRegFullInterruptEnable;
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LPUART_DisableInterrupts(config->base, mask);
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}
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static int mcux_lpuart_irq_rx_full(struct device *dev)
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{
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const struct mcux_lpuart_config *config = dev->config_info;
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u32_t flags = LPUART_GetStatusFlags(config->base);
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return (flags & kLPUART_RxDataRegFullFlag) != 0U;
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}
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static int mcux_lpuart_irq_rx_ready(struct device *dev)
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{
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const struct mcux_lpuart_config *config = dev->config_info;
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u32_t mask = kLPUART_RxDataRegFullInterruptEnable;
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return (LPUART_GetEnabledInterrupts(config->base) & mask)
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&& mcux_lpuart_irq_rx_full(dev);
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}
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static void mcux_lpuart_irq_err_enable(struct device *dev)
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{
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const struct mcux_lpuart_config *config = dev->config_info;
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u32_t mask = kLPUART_NoiseErrorInterruptEnable |
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kLPUART_FramingErrorInterruptEnable |
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kLPUART_ParityErrorInterruptEnable;
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LPUART_EnableInterrupts(config->base, mask);
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}
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static void mcux_lpuart_irq_err_disable(struct device *dev)
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{
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const struct mcux_lpuart_config *config = dev->config_info;
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u32_t mask = kLPUART_NoiseErrorInterruptEnable |
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kLPUART_FramingErrorInterruptEnable |
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kLPUART_ParityErrorInterruptEnable;
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LPUART_DisableInterrupts(config->base, mask);
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}
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static int mcux_lpuart_irq_is_pending(struct device *dev)
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{
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return (mcux_lpuart_irq_tx_ready(dev)
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|| mcux_lpuart_irq_rx_ready(dev));
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}
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static int mcux_lpuart_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_lpuart_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_lpuart_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_lpuart_isr(void *arg)
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{
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struct device *dev = arg;
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struct mcux_lpuart_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_lpuart_init(struct device *dev)
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{
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const struct mcux_lpuart_config *config = dev->config_info;
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lpuart_config_t uart_config;
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struct device *clock_dev;
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u32_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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LPUART_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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LPUART_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_lpuart_driver_api = {
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.poll_in = mcux_lpuart_poll_in,
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.poll_out = mcux_lpuart_poll_out,
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.err_check = mcux_lpuart_err_check,
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#ifdef CONFIG_UART_INTERRUPT_DRIVEN
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.fifo_fill = mcux_lpuart_fifo_fill,
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.fifo_read = mcux_lpuart_fifo_read,
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.irq_tx_enable = mcux_lpuart_irq_tx_enable,
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.irq_tx_disable = mcux_lpuart_irq_tx_disable,
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.irq_tx_complete = mcux_lpuart_irq_tx_complete,
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.irq_tx_ready = mcux_lpuart_irq_tx_ready,
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.irq_rx_enable = mcux_lpuart_irq_rx_enable,
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.irq_rx_disable = mcux_lpuart_irq_rx_disable,
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.irq_rx_ready = mcux_lpuart_irq_rx_ready,
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.irq_err_enable = mcux_lpuart_irq_err_enable,
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.irq_err_disable = mcux_lpuart_irq_err_disable,
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.irq_is_pending = mcux_lpuart_irq_is_pending,
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.irq_update = mcux_lpuart_irq_update,
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.irq_callback_set = mcux_lpuart_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_LPUART_IRQ_INIT(n, i) \
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do { \
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IRQ_CONNECT(DT_INST_IRQ_BY_IDX(n, i, irq), \
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DT_INST_IRQ_BY_IDX(n, i, priority), \
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mcux_lpuart_isr, DEVICE_GET(uart_##n), 0); \
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\
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irq_enable(DT_INST_IRQ_BY_IDX(n, i, irq)); \
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} while (0)
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#define LPUART_MCUX_CONFIG_FUNC(n) \
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static void mcux_lpuart_config_func_##n(struct device *dev) \
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{ \
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MCUX_LPUART_IRQ_INIT(n, 0); \
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\
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IF_ENABLED(DT_INST_IRQ_HAS_IDX(n, 1), \
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(MCUX_LPUART_IRQ_INIT(n, 1);)) \
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}
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#define LPUART_MCUX_IRQ_CFG_FUNC_INIT(n) \
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.irq_config_func = mcux_lpuart_config_func_##n
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#define LPUART_MCUX_INIT_CFG(n) \
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LPUART_MCUX_DECLARE_CFG(n, LPUART_MCUX_IRQ_CFG_FUNC_INIT(n))
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#else
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#define LPUART_MCUX_CONFIG_FUNC(n)
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#define LPUART_MCUX_IRQ_CFG_FUNC_INIT
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#define LPUART_MCUX_INIT_CFG(n) \
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LPUART_MCUX_DECLARE_CFG(n, LPUART_MCUX_IRQ_CFG_FUNC_INIT)
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#endif
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#define LPUART_MCUX_DECLARE_CFG(n, IRQ_FUNC_INIT) \
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static const struct mcux_lpuart_config mcux_lpuart_##n##_config = { \
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.base = (LPUART_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 LPUART_MCUX_INIT(n) \
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\
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static struct mcux_lpuart_data mcux_lpuart_##n##_data; \
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\
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static const struct mcux_lpuart_config mcux_lpuart_##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_lpuart_init, \
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&mcux_lpuart_##n##_data, \
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&mcux_lpuart_##n##_config, \
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PRE_KERNEL_1, \
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CONFIG_KERNEL_INIT_PRIORITY_DEVICE, \
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&mcux_lpuart_driver_api); \
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\
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LPUART_MCUX_CONFIG_FUNC(n) \
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\
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LPUART_MCUX_INIT_CFG(n);
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DT_INST_FOREACH_STATUS_OKAY(LPUART_MCUX_INIT)
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