drivers: serial: uart_mcux_lpuart: add DTR, DSR, and DCD signals
Add support for additional line control signals. Improved configuring uart_config_flow_control options. Signed-off-by: Derek Snell <derek.snell@nxp.com>
This commit is contained in:
Derek Snell
Benjamin Cabé
parent
7288223a28
commit
b259b18752
1 changed files with 116 additions and 31 deletions
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@ -30,10 +30,14 @@ LOG_MODULE_REGISTER(uart_mcux_lpuart, LOG_LEVEL_ERR);
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#define PINCTRL_STATE_FLOWCONTROL PINCTRL_STATE_PRIV_START
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#if defined(CONFIG_UART_LINE_CTRL) && \
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defined(FSL_FEATURE_LPUART_HAS_MODEM_SUPPORT) && \
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(FSL_FEATURE_LPUART_HAS_MODEM_SUPPORT)
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#define UART_LINE_CTRL_ENABLE
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/* Helper macros */
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#if defined(FSL_FEATURE_LPUART_HAS_MODEM_SUPPORT) && \
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FSL_FEATURE_LPUART_HAS_MODEM_SUPPORT
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#define LPUART_HAS_MODEM 1
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#endif
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#if defined(FSL_FEATURE_LPUART_HAS_MCR) && FSL_FEATURE_LPUART_HAS_MCR
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#define LPUART_HAS_MCR 1
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#endif
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#if defined(CONFIG_UART_ASYNC_API) && defined(CONFIG_UART_INTERRUPT_DRIVEN)
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@ -970,9 +974,43 @@ static void mcux_lpuart_isr(const struct device *dev)
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}
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#endif /* CONFIG_UART_MCUX_LPUART_ISR_SUPPORT */
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#if LPUART_HAS_MODEM
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static int mcux_lpuart_config_flowctrl(uint8_t flow_ctrl, lpuart_config_t *uart_config)
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{
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switch (flow_ctrl) {
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case UART_CFG_FLOW_CTRL_NONE:
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case UART_CFG_FLOW_CTRL_RS485:
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uart_config->enableTxCTS = false;
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uart_config->enableRxRTS = false;
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break;
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case UART_CFG_FLOW_CTRL_RTS_CTS:
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uart_config->enableTxCTS = true;
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uart_config->enableRxRTS = true;
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break;
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default:
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return -ENOTSUP;
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}
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return 0;
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}
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#else
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static int mcux_lpuart_config_flowctrl(uint8_t flow_ctrl, lpuart_config_t *uart_config)
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{
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if (flow_ctrl != UART_CFG_FLOW_CTRL_NONE) {
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return -ENOTSUP;
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}
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return 0;
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}
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#endif /* LPUART_HAS_MODEM */
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static int mcux_lpuart_configure_basic(const struct device *dev, const struct uart_config *cfg,
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lpuart_config_t *uart_config)
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{
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int ret;
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/* Translate UART API enum to LPUART enum from HAL */
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switch (cfg->parity) {
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case UART_CFG_PARITY_NONE:
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@ -1016,22 +1054,15 @@ static int mcux_lpuart_configure_basic(const struct device *dev, const struct ua
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}
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#endif
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#if defined(FSL_FEATURE_LPUART_HAS_MODEM_SUPPORT) && \
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FSL_FEATURE_LPUART_HAS_MODEM_SUPPORT
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switch (cfg->flow_ctrl) {
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case UART_CFG_FLOW_CTRL_NONE:
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case UART_CFG_FLOW_CTRL_RS485:
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uart_config->enableTxCTS = false;
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uart_config->enableRxRTS = false;
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break;
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case UART_CFG_FLOW_CTRL_RTS_CTS:
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uart_config->enableTxCTS = true;
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uart_config->enableRxRTS = true;
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break;
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default:
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/* Configure for Flow Control option */
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if (!IS_ENABLED(LPUART_HAS_MCR) && cfg->flow_ctrl == UART_CFG_FLOW_CTRL_DTR_DSR) {
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return -ENOTSUP;
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}
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#endif
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ret = mcux_lpuart_config_flowctrl(cfg->flow_ctrl, uart_config);
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if (ret) {
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return ret;
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}
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uart_config->baudRate_Bps = cfg->baudrate;
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uart_config->enableRx = true;
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@ -1105,8 +1136,7 @@ static int mcux_lpuart_configure_init(const struct device *dev, const struct uar
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LPUART_Init(config->base, &uart_config, clock_freq);
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#if defined(FSL_FEATURE_LPUART_HAS_MODEM_SUPPORT) && \
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FSL_FEATURE_LPUART_HAS_MODEM_SUPPORT
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#ifdef LPUART_HAS_MODEM
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if (cfg->flow_ctrl == UART_CFG_FLOW_CTRL_RS485) {
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/* Set the LPUART into RS485 mode (tx driver enable using RTS) */
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config->base->MODIR |= LPUART_MODIR_TXRTSE(true);
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@ -1185,10 +1215,15 @@ static int mcux_lpuart_configure(const struct device *dev,
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}
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#endif /* CONFIG_UART_USE_RUNTIME_CONFIGURE */
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#ifdef UART_LINE_CTRL_ENABLE
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static void mcux_lpuart_line_ctrl_set_rts(const struct mcux_lpuart_config *config,
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uint32_t val)
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#ifdef CONFIG_UART_LINE_CTRL
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#if LPUART_HAS_MODEM
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static void mcux_lpuart_line_ctrl_set_rts(const struct device *dev, uint32_t val)
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{
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const struct mcux_lpuart_config *config = dev->config;
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/* Disable Transmitter and Receiver */
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config->base->CTRL &= ~(LPUART_CTRL_TE_MASK | LPUART_CTRL_RE_MASK);
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if (val >= 1U) {
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/* Reset TXRTS to set RXRTSE bit, this provides high-level on RTS line */
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config->base->MODIR &= ~(LPUART_MODIR_TXRTSPOL_MASK | LPUART_MODIR_TXRTSE_MASK);
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@ -1199,20 +1234,39 @@ static void mcux_lpuart_line_ctrl_set_rts(const struct mcux_lpuart_config *confi
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config->base->MODIR |= (LPUART_MODIR_TXRTSPOL_MASK | LPUART_MODIR_TXRTSE_MASK);
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}
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}
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#else
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#define mcux_lpuart_line_ctrl_set_rts(dev, val) ret = -ENOTSUP
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#endif /* LPUART_HAS_MODEM */
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#if LPUART_HAS_MCR
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static void mcux_lpuart_set_dtr(const struct device *dev, uint32_t val)
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{
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const struct mcux_lpuart_config *config = dev->config;
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if (val >= 1U) {
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/* assert DTR_b */
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config->base->MCR &= ~LPUART_MCR_DTR_MASK;
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} else {
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/* deassert DTR_b */
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config->base->MCR |= LPUART_MCR_DTR_MASK;
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}
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}
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#else
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#define mcux_lpuart_set_dtr(dev, val) ret = -ENOTSUP
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#endif /* LPUART_HAS_MCR */
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static int mcux_lpuart_line_ctrl_set(const struct device *dev,
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uint32_t ctrl, uint32_t val)
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{
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const struct mcux_lpuart_config *config = dev->config;
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int ret = 0;
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switch (ctrl) {
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case UART_LINE_CTRL_RTS:
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/* Disable Transmitter and Receiver */
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config->base->CTRL &= ~(LPUART_CTRL_TE_MASK | LPUART_CTRL_RE_MASK);
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mcux_lpuart_line_ctrl_set_rts(config, val);
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mcux_lpuart_line_ctrl_set_rts(dev, val);
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break;
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case UART_LINE_CTRL_DTR:
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mcux_lpuart_set_dtr(dev, val);
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break;
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default:
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@ -1221,7 +1275,37 @@ static int mcux_lpuart_line_ctrl_set(const struct device *dev,
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return ret;
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}
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#endif /* UART_LINE_CTRL_ENABLE */
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#if LPUART_HAS_MCR
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static int mcux_lpuart_line_ctrl_get(const struct device *dev,
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uint32_t ctrl, uint32_t *val)
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{
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const struct mcux_lpuart_config *config = dev->config;
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int ret = 0;
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switch (ctrl) {
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case UART_LINE_CTRL_DSR:
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*val = (config->base->MSR & LPUART_MSR_DSR_MASK) >> LPUART_MSR_DSR_SHIFT;
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break;
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case UART_LINE_CTRL_DCD:
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*val = (config->base->MSR & LPUART_MSR_DCD_MASK) >> LPUART_MSR_DCD_SHIFT;
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break;
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default:
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ret = -ENOTSUP;
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}
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return ret;
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}
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#else
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static int mcux_lpuart_line_ctrl_get(const struct device *dev,
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uint32_t ctrl, uint32_t *val)
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{
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return -ENOTSUP;
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}
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#endif /* LPUART_HAS_MCR */
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#endif /* CONFIG_UART_LINE_CTRL */
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static int mcux_lpuart_init(const struct device *dev)
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{
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@ -1301,9 +1385,10 @@ static DEVICE_API(uart, mcux_lpuart_driver_api) = {
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.rx_buf_rsp = mcux_lpuart_rx_buf_rsp,
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.rx_disable = mcux_lpuart_rx_disable,
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#endif /* CONFIG_UART_ASYNC_API */
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#ifdef UART_LINE_CTRL_ENABLE
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#ifdef CONFIG_UART_LINE_CTRL
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.line_ctrl_set = mcux_lpuart_line_ctrl_set,
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#endif /* UART_LINE_CTRL_ENABLE */
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.line_ctrl_get = mcux_lpuart_line_ctrl_get,
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#endif /* CONFIG_UART_LINE_CTRL */
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};
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