| /* |
| * Copyright (c) 2019, Manivannan Sadhasivam <mani@kernel.org> |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #define DT_DRV_COMPAT nxp_imx_iuart |
| |
| #include <zephyr/device.h> |
| #include <zephyr/drivers/uart.h> |
| #include <zephyr/drivers/clock_control.h> |
| #include <errno.h> |
| #include <fsl_uart.h> |
| #include <zephyr/drivers/pinctrl.h> |
| |
| struct mcux_iuart_config { |
| UART_Type *base; |
| const struct device *clock_dev; |
| clock_control_subsys_t clock_subsys; |
| uint32_t baud_rate; |
| const struct pinctrl_dev_config *pincfg; |
| #ifdef CONFIG_UART_INTERRUPT_DRIVEN |
| void (*irq_config_func)(const struct device *dev); |
| #endif |
| }; |
| |
| struct mcux_iuart_data { |
| #ifdef CONFIG_UART_INTERRUPT_DRIVEN |
| uart_irq_callback_user_data_t callback; |
| void *cb_data; |
| #endif |
| }; |
| |
| static int mcux_iuart_poll_in(const struct device *dev, unsigned char *c) |
| { |
| const struct mcux_iuart_config *config = dev->config; |
| int ret = -1; |
| |
| if (UART_GetStatusFlag(config->base, kUART_RxDataReadyFlag)) { |
| *c = UART_ReadByte(config->base); |
| ret = 0; |
| } |
| |
| return ret; |
| } |
| |
| static void mcux_iuart_poll_out(const struct device *dev, unsigned char c) |
| { |
| const struct mcux_iuart_config *config = dev->config; |
| |
| while (!(UART_GetStatusFlag(config->base, kUART_TxReadyFlag))) { |
| } |
| |
| UART_WriteByte(config->base, c); |
| } |
| |
| static int mcux_iuart_err_check(const struct device *dev) |
| { |
| const struct mcux_iuart_config *config = dev->config; |
| int err = 0; |
| |
| if (UART_GetStatusFlag(config->base, kUART_RxOverrunFlag)) { |
| err |= UART_ERROR_OVERRUN; |
| UART_ClearStatusFlag(config->base, kUART_RxOverrunFlag); |
| } |
| |
| if (UART_GetStatusFlag(config->base, kUART_ParityErrorFlag)) { |
| err |= UART_ERROR_PARITY; |
| UART_ClearStatusFlag(config->base, kUART_ParityErrorFlag); |
| } |
| |
| if (UART_GetStatusFlag(config->base, kUART_FrameErrorFlag)) { |
| err |= UART_ERROR_FRAMING; |
| UART_ClearStatusFlag(config->base, kUART_FrameErrorFlag); |
| } |
| |
| return err; |
| } |
| |
| #ifdef CONFIG_UART_INTERRUPT_DRIVEN |
| static int mcux_iuart_fifo_fill(const struct device *dev, |
| const uint8_t *tx_data, |
| int len) |
| { |
| const struct mcux_iuart_config *config = dev->config; |
| uint8_t num_tx = 0U; |
| |
| while ((len - num_tx > 0) && |
| (UART_GetStatusFlag(config->base, kUART_TxEmptyFlag))) { |
| |
| UART_WriteByte(config->base, tx_data[num_tx++]); |
| } |
| |
| return num_tx; |
| } |
| |
| static int mcux_iuart_fifo_read(const struct device *dev, uint8_t *rx_data, |
| const int len) |
| { |
| const struct mcux_iuart_config *config = dev->config; |
| uint8_t num_rx = 0U; |
| |
| while ((len - num_rx > 0) && |
| (UART_GetStatusFlag(config->base, kUART_RxDataReadyFlag))) { |
| |
| rx_data[num_rx++] = UART_ReadByte(config->base); |
| } |
| |
| return num_rx; |
| } |
| |
| static void mcux_iuart_irq_tx_enable(const struct device *dev) |
| { |
| const struct mcux_iuart_config *config = dev->config; |
| |
| UART_EnableInterrupts(config->base, kUART_TxEmptyEnable); |
| } |
| |
| static void mcux_iuart_irq_tx_disable(const struct device *dev) |
| { |
| const struct mcux_iuart_config *config = dev->config; |
| |
| UART_DisableInterrupts(config->base, kUART_TxEmptyEnable); |
| } |
| |
| static int mcux_iuart_irq_tx_complete(const struct device *dev) |
| { |
| const struct mcux_iuart_config *config = dev->config; |
| |
| return (UART_GetStatusFlag(config->base, kUART_TxEmptyFlag)) != 0U; |
| } |
| |
| static int mcux_iuart_irq_tx_ready(const struct device *dev) |
| { |
| const struct mcux_iuart_config *config = dev->config; |
| uint32_t mask = kUART_TxEmptyEnable; |
| |
| return (UART_GetEnabledInterrupts(config->base) & mask) |
| && mcux_iuart_irq_tx_complete(dev); |
| } |
| |
| static void mcux_iuart_irq_rx_enable(const struct device *dev) |
| { |
| const struct mcux_iuart_config *config = dev->config; |
| uint32_t mask = kUART_RxDataReadyEnable; |
| |
| UART_EnableInterrupts(config->base, mask); |
| } |
| |
| static void mcux_iuart_irq_rx_disable(const struct device *dev) |
| { |
| const struct mcux_iuart_config *config = dev->config; |
| uint32_t mask = kUART_RxDataReadyEnable; |
| |
| UART_DisableInterrupts(config->base, mask); |
| } |
| |
| static int mcux_iuart_irq_rx_full(const struct device *dev) |
| { |
| const struct mcux_iuart_config *config = dev->config; |
| |
| return (UART_GetStatusFlag(config->base, kUART_RxDataReadyFlag)) != 0U; |
| } |
| |
| static int mcux_iuart_irq_rx_pending(const struct device *dev) |
| { |
| const struct mcux_iuart_config *config = dev->config; |
| uint32_t mask = kUART_RxDataReadyEnable; |
| |
| return (UART_GetEnabledInterrupts(config->base) & mask) |
| && mcux_iuart_irq_rx_full(dev); |
| } |
| |
| static void mcux_iuart_irq_err_enable(const struct device *dev) |
| { |
| const struct mcux_iuart_config *config = dev->config; |
| uint32_t mask = kUART_RxOverrunEnable | kUART_ParityErrorEnable | |
| kUART_FrameErrorEnable; |
| |
| UART_EnableInterrupts(config->base, mask); |
| } |
| |
| static void mcux_iuart_irq_err_disable(const struct device *dev) |
| { |
| const struct mcux_iuart_config *config = dev->config; |
| uint32_t mask = kUART_RxOverrunEnable | kUART_ParityErrorEnable | |
| kUART_FrameErrorEnable; |
| |
| UART_DisableInterrupts(config->base, mask); |
| } |
| |
| static int mcux_iuart_irq_is_pending(const struct device *dev) |
| { |
| return mcux_iuart_irq_tx_ready(dev) || mcux_iuart_irq_rx_pending(dev); |
| } |
| |
| static int mcux_iuart_irq_update(const struct device *dev) |
| { |
| return 1; |
| } |
| |
| static void mcux_iuart_irq_callback_set(const struct device *dev, |
| uart_irq_callback_user_data_t cb, |
| void *cb_data) |
| { |
| struct mcux_iuart_data *data = dev->data; |
| |
| data->callback = cb; |
| data->cb_data = cb_data; |
| } |
| |
| static void mcux_iuart_isr(const struct device *dev) |
| { |
| struct mcux_iuart_data *data = dev->data; |
| |
| if (data->callback) { |
| data->callback(dev, data->cb_data); |
| } |
| } |
| #endif /* CONFIG_UART_INTERRUPT_DRIVEN */ |
| |
| static int mcux_iuart_init(const struct device *dev) |
| { |
| const struct mcux_iuart_config *config = dev->config; |
| uart_config_t uart_config; |
| uint32_t clock_freq; |
| int err; |
| |
| if (!device_is_ready(config->clock_dev)) { |
| return -ENODEV; |
| } |
| |
| if (clock_control_get_rate(config->clock_dev, config->clock_subsys, |
| &clock_freq)) { |
| return -EINVAL; |
| } |
| |
| UART_GetDefaultConfig(&uart_config); |
| uart_config.enableTx = true; |
| uart_config.enableRx = true; |
| uart_config.baudRate_Bps = config->baud_rate; |
| |
| UART_Init(config->base, &uart_config, clock_freq); |
| |
| err = pinctrl_apply_state(config->pincfg, PINCTRL_STATE_DEFAULT); |
| if (err) { |
| return err; |
| } |
| |
| #ifdef CONFIG_UART_INTERRUPT_DRIVEN |
| config->irq_config_func(dev); |
| #endif |
| |
| return 0; |
| } |
| |
| static const struct uart_driver_api mcux_iuart_driver_api = { |
| .poll_in = mcux_iuart_poll_in, |
| .poll_out = mcux_iuart_poll_out, |
| .err_check = mcux_iuart_err_check, |
| #ifdef CONFIG_UART_INTERRUPT_DRIVEN |
| .fifo_fill = mcux_iuart_fifo_fill, |
| .fifo_read = mcux_iuart_fifo_read, |
| .irq_tx_enable = mcux_iuart_irq_tx_enable, |
| .irq_tx_disable = mcux_iuart_irq_tx_disable, |
| .irq_tx_complete = mcux_iuart_irq_tx_complete, |
| .irq_tx_ready = mcux_iuart_irq_tx_ready, |
| .irq_rx_enable = mcux_iuart_irq_rx_enable, |
| .irq_rx_disable = mcux_iuart_irq_rx_disable, |
| .irq_rx_ready = mcux_iuart_irq_rx_full, |
| .irq_err_enable = mcux_iuart_irq_err_enable, |
| .irq_err_disable = mcux_iuart_irq_err_disable, |
| .irq_is_pending = mcux_iuart_irq_is_pending, |
| .irq_update = mcux_iuart_irq_update, |
| .irq_callback_set = mcux_iuart_irq_callback_set, |
| #endif |
| }; |
| |
| #ifdef CONFIG_UART_INTERRUPT_DRIVEN |
| #define MCUX_IUART_IRQ_INIT(n, i) \ |
| do { \ |
| IRQ_CONNECT(DT_INST_IRQ_BY_IDX(n, i, irq), \ |
| DT_INST_IRQ_BY_IDX(n, i, priority), \ |
| mcux_iuart_isr, DEVICE_DT_INST_GET(n), 0); \ |
| \ |
| irq_enable(DT_INST_IRQ_BY_IDX(n, i, irq)); \ |
| } while (false) |
| #define IUART_MCUX_CONFIG_FUNC(n) \ |
| static void mcux_iuart_config_func_##n(const struct device *dev) \ |
| { \ |
| MCUX_IUART_IRQ_INIT(n, 0); \ |
| \ |
| IF_ENABLED(DT_INST_IRQ_HAS_IDX(n, 1), \ |
| (MCUX_IUART_IRQ_INIT(n, 1);)) \ |
| } |
| #define IUART_MCUX_IRQ_CFG_FUNC_INIT(n) \ |
| .irq_config_func = mcux_iuart_config_func_##n |
| #define IUART_MCUX_INIT_CFG(n) \ |
| IUART_MCUX_DECLARE_CFG(n, IUART_MCUX_IRQ_CFG_FUNC_INIT(n)) |
| #else |
| #define IUART_MCUX_CONFIG_FUNC(n) |
| #define IUART_MCUX_IRQ_CFG_FUNC_INIT |
| #define IUART_MCUX_INIT_CFG(n) \ |
| IUART_MCUX_DECLARE_CFG(n, IUART_MCUX_IRQ_CFG_FUNC_INIT) |
| #endif |
| |
| #define IUART_MCUX_DECLARE_CFG(n, IRQ_FUNC_INIT) \ |
| static const struct mcux_iuart_config mcux_iuart_##n##_config = { \ |
| .base = (UART_Type *) DT_INST_REG_ADDR(n), \ |
| .clock_dev = DEVICE_DT_GET(DT_INST_CLOCKS_CTLR(n)), \ |
| .clock_subsys = (clock_control_subsys_t)DT_INST_CLOCKS_CELL(n, name),\ |
| .baud_rate = DT_INST_PROP(n, current_speed), \ |
| .pincfg = PINCTRL_DT_INST_DEV_CONFIG_GET(n), \ |
| IRQ_FUNC_INIT \ |
| } |
| |
| #define IUART_MCUX_INIT(n) \ |
| \ |
| static struct mcux_iuart_data mcux_iuart_##n##_data; \ |
| \ |
| static const struct mcux_iuart_config mcux_iuart_##n##_config;\ |
| \ |
| DEVICE_DT_INST_DEFINE(n, \ |
| &mcux_iuart_init, \ |
| NULL, \ |
| &mcux_iuart_##n##_data, \ |
| &mcux_iuart_##n##_config, \ |
| PRE_KERNEL_1, \ |
| CONFIG_SERIAL_INIT_PRIORITY, \ |
| &mcux_iuart_driver_api); \ |
| \ |
| PINCTRL_DT_INST_DEFINE(n); \ |
| \ |
| IUART_MCUX_CONFIG_FUNC(n) \ |
| \ |
| IUART_MCUX_INIT_CFG(n); |
| |
| DT_INST_FOREACH_STATUS_OKAY(IUART_MCUX_INIT) |