| /* |
| * Copyright (c) 2017, NXP |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #include <errno.h> |
| #include <device.h> |
| #include <uart.h> |
| #include <clock_control.h> |
| #include <fsl_lpuart.h> |
| #include <soc.h> |
| |
| struct mcux_lpuart_config { |
| LPUART_Type *base; |
| char *clock_name; |
| clock_control_subsys_t clock_subsys; |
| u32_t baud_rate; |
| #ifdef CONFIG_UART_INTERRUPT_DRIVEN |
| void (*irq_config_func)(struct device *dev); |
| #endif |
| }; |
| |
| struct mcux_lpuart_data { |
| #ifdef CONFIG_UART_INTERRUPT_DRIVEN |
| uart_irq_callback_t callback; |
| #endif |
| }; |
| |
| static int mcux_lpuart_poll_in(struct device *dev, unsigned char *c) |
| { |
| const struct mcux_lpuart_config *config = dev->config->config_info; |
| u32_t flags = LPUART_GetStatusFlags(config->base); |
| int ret = -1; |
| |
| if (flags & kLPUART_RxDataRegFullFlag) { |
| *c = LPUART_ReadByte(config->base); |
| ret = 0; |
| } |
| |
| return ret; |
| } |
| |
| static unsigned char mcux_lpuart_poll_out(struct device *dev, unsigned char c) |
| { |
| const struct mcux_lpuart_config *config = dev->config->config_info; |
| |
| while (!(LPUART_GetStatusFlags(config->base) |
| & kLPUART_TxDataRegEmptyFlag)) |
| ; |
| |
| LPUART_WriteByte(config->base, c); |
| |
| return c; |
| } |
| |
| static int mcux_lpuart_err_check(struct device *dev) |
| { |
| const struct mcux_lpuart_config *config = dev->config->config_info; |
| u32_t flags = LPUART_GetStatusFlags(config->base); |
| int err = 0; |
| |
| if (flags & kLPUART_RxOverrunFlag) { |
| err |= UART_ERROR_OVERRUN; |
| } |
| |
| if (flags & kLPUART_ParityErrorFlag) { |
| err |= UART_ERROR_PARITY; |
| } |
| |
| if (flags & kLPUART_FramingErrorFlag) { |
| err |= UART_ERROR_FRAMING; |
| } |
| |
| LPUART_ClearStatusFlags(config->base, kLPUART_RxOverrunFlag | |
| kLPUART_ParityErrorFlag | |
| kLPUART_FramingErrorFlag); |
| |
| return err; |
| } |
| |
| #ifdef CONFIG_UART_INTERRUPT_DRIVEN |
| static int mcux_lpuart_fifo_fill(struct device *dev, const u8_t *tx_data, |
| int len) |
| { |
| const struct mcux_lpuart_config *config = dev->config->config_info; |
| u8_t num_tx = 0; |
| |
| while ((len - num_tx > 0) && |
| (LPUART_GetStatusFlags(config->base) |
| & kLPUART_TxDataRegEmptyFlag)) { |
| |
| LPUART_WriteByte(config->base, tx_data[num_tx++]); |
| } |
| |
| return num_tx; |
| } |
| |
| static int mcux_lpuart_fifo_read(struct device *dev, u8_t *rx_data, |
| const int len) |
| { |
| const struct mcux_lpuart_config *config = dev->config->config_info; |
| u8_t num_rx = 0; |
| |
| while ((len - num_rx > 0) && |
| (LPUART_GetStatusFlags(config->base) |
| & kLPUART_RxDataRegFullFlag)) { |
| |
| rx_data[num_rx++] = LPUART_ReadByte(config->base); |
| } |
| |
| return num_rx; |
| } |
| |
| static void mcux_lpuart_irq_tx_enable(struct device *dev) |
| { |
| const struct mcux_lpuart_config *config = dev->config->config_info; |
| u32_t mask = kLPUART_TxDataRegEmptyInterruptEnable; |
| |
| LPUART_EnableInterrupts(config->base, mask); |
| } |
| |
| static void mcux_lpuart_irq_tx_disable(struct device *dev) |
| { |
| const struct mcux_lpuart_config *config = dev->config->config_info; |
| u32_t mask = kLPUART_TxDataRegEmptyInterruptEnable; |
| |
| LPUART_DisableInterrupts(config->base, mask); |
| } |
| |
| static int mcux_lpuart_irq_tx_complete(struct device *dev) |
| { |
| const struct mcux_lpuart_config *config = dev->config->config_info; |
| u32_t flags = LPUART_GetStatusFlags(config->base); |
| |
| return (flags & kLPUART_TxDataRegEmptyFlag) != 0; |
| } |
| |
| static int mcux_lpuart_irq_tx_ready(struct device *dev) |
| { |
| const struct mcux_lpuart_config *config = dev->config->config_info; |
| u32_t mask = kLPUART_TxDataRegEmptyInterruptEnable; |
| |
| return (LPUART_GetEnabledInterrupts(config->base) & mask) |
| && mcux_lpuart_irq_tx_complete(dev); |
| } |
| |
| static void mcux_lpuart_irq_rx_enable(struct device *dev) |
| { |
| const struct mcux_lpuart_config *config = dev->config->config_info; |
| u32_t mask = kLPUART_RxDataRegFullInterruptEnable; |
| |
| LPUART_EnableInterrupts(config->base, mask); |
| } |
| |
| static void mcux_lpuart_irq_rx_disable(struct device *dev) |
| { |
| const struct mcux_lpuart_config *config = dev->config->config_info; |
| u32_t mask = kLPUART_RxDataRegFullInterruptEnable; |
| |
| LPUART_DisableInterrupts(config->base, mask); |
| } |
| |
| static int mcux_lpuart_irq_rx_full(struct device *dev) |
| { |
| const struct mcux_lpuart_config *config = dev->config->config_info; |
| u32_t flags = LPUART_GetStatusFlags(config->base); |
| |
| return (flags & kLPUART_RxDataRegFullFlag) != 0; |
| } |
| |
| static int mcux_lpuart_irq_rx_ready(struct device *dev) |
| { |
| const struct mcux_lpuart_config *config = dev->config->config_info; |
| u32_t mask = kLPUART_RxDataRegFullInterruptEnable; |
| |
| return (LPUART_GetEnabledInterrupts(config->base) & mask) |
| && mcux_lpuart_irq_rx_full(dev); |
| } |
| |
| static void mcux_lpuart_irq_err_enable(struct device *dev) |
| { |
| const struct mcux_lpuart_config *config = dev->config->config_info; |
| u32_t mask = kLPUART_NoiseErrorInterruptEnable | |
| kLPUART_FramingErrorInterruptEnable | |
| kLPUART_ParityErrorInterruptEnable; |
| |
| LPUART_EnableInterrupts(config->base, mask); |
| } |
| |
| static void mcux_lpuart_irq_err_disable(struct device *dev) |
| { |
| const struct mcux_lpuart_config *config = dev->config->config_info; |
| u32_t mask = kLPUART_NoiseErrorInterruptEnable | |
| kLPUART_FramingErrorInterruptEnable | |
| kLPUART_ParityErrorInterruptEnable; |
| |
| LPUART_DisableInterrupts(config->base, mask); |
| } |
| |
| static int mcux_lpuart_irq_is_pending(struct device *dev) |
| { |
| return (mcux_lpuart_irq_tx_ready(dev) |
| || mcux_lpuart_irq_rx_ready(dev)); |
| } |
| |
| static int mcux_lpuart_irq_update(struct device *dev) |
| { |
| return 1; |
| } |
| |
| static void mcux_lpuart_irq_callback_set(struct device *dev, |
| uart_irq_callback_t cb) |
| { |
| struct mcux_lpuart_data *data = dev->driver_data; |
| |
| data->callback = cb; |
| } |
| |
| static void mcux_lpuart_isr(void *arg) |
| { |
| struct device *dev = arg; |
| struct mcux_lpuart_data *data = dev->driver_data; |
| |
| if (data->callback) { |
| data->callback(dev); |
| } |
| } |
| #endif /* CONFIG_UART_INTERRUPT_DRIVEN */ |
| |
| static int mcux_lpuart_init(struct device *dev) |
| { |
| const struct mcux_lpuart_config *config = dev->config->config_info; |
| lpuart_config_t uart_config; |
| struct device *clock_dev; |
| u32_t clock_freq; |
| |
| clock_dev = device_get_binding(config->clock_name); |
| if (clock_dev == NULL) { |
| return -EINVAL; |
| } |
| |
| if (clock_control_get_rate(clock_dev, config->clock_subsys, |
| &clock_freq)) { |
| return -EINVAL; |
| } |
| |
| LPUART_GetDefaultConfig(&uart_config); |
| uart_config.enableTx = true; |
| uart_config.enableRx = true; |
| uart_config.baudRate_Bps = config->baud_rate; |
| |
| LPUART_Init(config->base, &uart_config, clock_freq); |
| |
| #ifdef CONFIG_UART_INTERRUPT_DRIVEN |
| config->irq_config_func(dev); |
| #endif |
| |
| return 0; |
| } |
| |
| static const struct uart_driver_api mcux_lpuart_driver_api = { |
| .poll_in = mcux_lpuart_poll_in, |
| .poll_out = mcux_lpuart_poll_out, |
| .err_check = mcux_lpuart_err_check, |
| #ifdef CONFIG_UART_INTERRUPT_DRIVEN |
| .fifo_fill = mcux_lpuart_fifo_fill, |
| .fifo_read = mcux_lpuart_fifo_read, |
| .irq_tx_enable = mcux_lpuart_irq_tx_enable, |
| .irq_tx_disable = mcux_lpuart_irq_tx_disable, |
| .irq_tx_complete = mcux_lpuart_irq_tx_complete, |
| .irq_tx_ready = mcux_lpuart_irq_tx_ready, |
| .irq_rx_enable = mcux_lpuart_irq_rx_enable, |
| .irq_rx_disable = mcux_lpuart_irq_rx_disable, |
| .irq_rx_ready = mcux_lpuart_irq_rx_ready, |
| .irq_err_enable = mcux_lpuart_irq_err_enable, |
| .irq_err_disable = mcux_lpuart_irq_err_disable, |
| .irq_is_pending = mcux_lpuart_irq_is_pending, |
| .irq_update = mcux_lpuart_irq_update, |
| .irq_callback_set = mcux_lpuart_irq_callback_set, |
| #endif |
| }; |
| |
| #ifdef CONFIG_UART_MCUX_LPUART_0 |
| |
| #ifdef CONFIG_UART_INTERRUPT_DRIVEN |
| static void mcux_lpuart_config_func_0(struct device *dev); |
| #endif |
| |
| static const struct mcux_lpuart_config mcux_lpuart_0_config = { |
| .base = LPUART0, |
| .clock_name = CONFIG_UART_MCUX_LPUART_0_CLOCK_NAME, |
| .clock_subsys = |
| (clock_control_subsys_t)CONFIG_UART_MCUX_LPUART_0_CLOCK_SUBSYS, |
| .baud_rate = CONFIG_UART_MCUX_LPUART_0_BAUD_RATE, |
| #ifdef CONFIG_UART_INTERRUPT_DRIVEN |
| .irq_config_func = mcux_lpuart_config_func_0, |
| #endif |
| }; |
| |
| static struct mcux_lpuart_data mcux_lpuart_0_data; |
| |
| DEVICE_AND_API_INIT(uart_0, CONFIG_UART_MCUX_LPUART_0_NAME, |
| &mcux_lpuart_init, |
| &mcux_lpuart_0_data, &mcux_lpuart_0_config, |
| PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEVICE, |
| &mcux_lpuart_driver_api); |
| |
| #ifdef CONFIG_UART_INTERRUPT_DRIVEN |
| static void mcux_lpuart_config_func_0(struct device *dev) |
| { |
| IRQ_CONNECT(CONFIG_UART_MCUX_LPUART_0_IRQ, |
| CONFIG_UART_MCUX_LPUART_0_IRQ_PRI, |
| mcux_lpuart_isr, DEVICE_GET(uart_0), 0); |
| |
| irq_enable(CONFIG_UART_MCUX_LPUART_0_IRQ); |
| } |
| #endif |
| |
| #endif /* CONFIG_UART_MCUX_LPUART_0 */ |
| |
| #ifdef CONFIG_UART_MCUX_LPUART_1 |
| |
| #ifdef CONFIG_UART_INTERRUPT_DRIVEN |
| static void mcux_lpuart_config_func_1(struct device *dev); |
| #endif |
| |
| static const struct mcux_lpuart_config mcux_lpuart_1_config = { |
| .base = (LPUART_Type *) CONFIG_UART_MCUX_LPUART_1_BASE_ADDRESS, |
| .clock_name = CONFIG_UART_MCUX_LPUART_1_CLOCK_NAME, |
| .clock_subsys = |
| (clock_control_subsys_t)CONFIG_UART_MCUX_LPUART_1_CLOCK_SUBSYS, |
| .baud_rate = CONFIG_UART_MCUX_LPUART_1_BAUD_RATE, |
| #ifdef CONFIG_UART_INTERRUPT_DRIVEN |
| .irq_config_func = mcux_lpuart_config_func_1, |
| #endif |
| }; |
| |
| static struct mcux_lpuart_data mcux_lpuart_1_data; |
| |
| DEVICE_AND_API_INIT(uart_1, CONFIG_UART_MCUX_LPUART_1_NAME, |
| &mcux_lpuart_init, |
| &mcux_lpuart_1_data, &mcux_lpuart_1_config, |
| PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEVICE, |
| &mcux_lpuart_driver_api); |
| |
| #ifdef CONFIG_UART_INTERRUPT_DRIVEN |
| static void mcux_lpuart_config_func_1(struct device *dev) |
| { |
| IRQ_CONNECT(CONFIG_UART_MCUX_LPUART_1_IRQ, |
| CONFIG_UART_MCUX_LPUART_1_IRQ_PRI, |
| mcux_lpuart_isr, DEVICE_GET(uart_1), 0); |
| |
| irq_enable(CONFIG_UART_MCUX_LPUART_1_IRQ); |
| } |
| #endif |
| |
| #endif /* CONFIG_UART_MCUX_LPUART_1 */ |