arch/arm/src/imxrt/imxrt_serial.c: IMXRT1050 LPUART TERMIOS support added.

arch/arm/src/imxrt/Kconfig

@@ -86,48 +86,56 @@ config IMXRT_LPUART1
 	bool "LPUART1"
 	default n
 	select LPUART1_SERIALDRIVER
+	select ARCH_HAVE_SERIAL_TERMIOS
 	select IMXRT_HAVE_LPUART
 
 config IMXRT_LPUART2
 	bool "LPUART2"
 	default n
 	select LPUART2_SERIALDRIVER
+	select ARCH_HAVE_SERIAL_TERMIOS
 	select IMXRT_HAVE_LPUART
 
 config IMXRT_LPUART3
 	bool "LPUART3"
 	default n
 	select LPUART3_SERIALDRIVER
+	select ARCH_HAVE_SERIAL_TERMIOS
 	select IMXRT_HAVE_LPUART
 
 config IMXRT_LPUART4
 	bool "LPUART4"
 	default n
 	select LPUART4_SERIALDRIVER
+	select ARCH_HAVE_SERIAL_TERMIOS
 	select IMXRT_HAVE_LPUART
 
 config IMXRT_LPUART5
 	bool "LPUART5"
 	default n
 	select LPUART5_SERIALDRIVER
+	select ARCH_HAVE_SERIAL_TERMIOS
 	select IMXRT_HAVE_LPUART
 
 config IMXRT_LPUART6
 	bool "LPUART6"
 	default n
 	select LPUART6_SERIALDRIVER
+	select ARCH_HAVE_SERIAL_TERMIOS
 	select IMXRT_HAVE_LPUART
 
 config IMXRT_LPUART7
 	bool "LPUART7"
 	default n
 	select LPUART7_SERIALDRIVER
+	select ARCH_HAVE_SERIAL_TERMIOS
 	select IMXRT_HAVE_LPUART
 
 config IMXRT_LPUART8
 	bool "LPUART8"
 	default n
 	select LPUART8_SERIALDRIVER
+	select ARCH_HAVE_SERIAL_TERMIOS
 	select IMXRT_HAVE_LPUART
 
 endmenu # LPUART Peripherals

arch/arm/src/imxrt/imxrt_serial.c

@@ -48,6 +48,10 @@
 #include <errno.h>
 #include <debug.h>
 
+#ifdef CONFIG_SERIAL_TERMIOS
+#  include <termios.h>
+#endif
+
 #include <nuttx/irq.h>
 #include <nuttx/arch.h>
 #include <nuttx/init.h>
@@ -726,6 +730,7 @@ static inline void imxrt_restoreuartint(struct imxrt_uart_s *priv,
    * enabled/disabled.
    */
 
+  flags   = spin_lock_irqsave();
   regval  = imxrt_serialin(priv, IMXRT_LPUART_CTRL_OFFSET);
   regval &= ~LPUART_ALL_INTS;
   regval |= ie;
@@ -952,6 +957,166 @@ static int imxrt_ioctl(struct file *filep, int cmd, unsigned long arg)
        break;
 #endif
 
+#ifdef CONFIG_SERIAL_TERMIOS
+    case TCGETS:
+      {
+        struct termios  *termiosp = (struct termios *)arg;
+        struct imxrt_uart_s *priv = (struct imxrt_uart_s *)dev->priv;
+
+        if (!termiosp)
+          {
+            ret = -EINVAL;
+            break;
+          }
+
+        /* Return baud */
+
+        cfsetispeed(termiosp, priv->baud);
+
+        /* Return parity */
+
+        termiosp->c_cflag = ((priv->parity != 0) ? PARENB : 0) |
+                            ((priv->parity == 1) ? PARODD : 0);
+
+        /* Return stop bits */
+
+        termiosp->c_cflag |= (priv->stopbits2) ? CSTOPB : 0;
+
+#if defined(CONFIG_SERIAL_IFLOWCONTROL) || defined(CONFIG_SERIAL_OFLOWCONTROL)
+        /* Return flow control */
+
+        termiosp->c_cflag |= (priv->flowc) ? (CCTS_OFLOW | CRTS_IFLOW): 0;
+#endif
+        /* Return number of bits */
+
+        switch (priv->bits)
+          {
+          case 5:
+            termiosp->c_cflag |= CS5;
+            break;
+
+          case 6:
+            termiosp->c_cflag |= CS6;
+            break;
+
+          case 7:
+            termiosp->c_cflag |= CS7;
+            break;
+
+          default:
+          case 8:
+            termiosp->c_cflag |= CS8;
+            break;
+
+          case 9:
+            termiosp->c_cflag |= CS8 /* CS9 */;
+            break;
+          }
+      }
+      break;
+
+    case TCSETS:
+      {
+        struct termios  *termiosp = (struct termios *)arg;
+        struct imxrt_uart_s *priv = (struct imxrt_uart_s *)dev->priv;
+        uint32_t baud;
+        uint32_t ie;
+        uint8_t parity;
+        uint8_t nbits;
+        bool stop2;
+#if defined(CONFIG_SERIAL_IFLOWCONTROL) || defined(CONFIG_SERIAL_OFLOWCONTROL)
+        bool flowc;
+#endif
+
+        if (!termiosp)
+          {
+            ret = -EINVAL;
+            break;
+          }
+
+        /* Decode baud. */
+
+        ret = OK;
+        baud = cfgetispeed(termiosp);
+
+        /* Decode number of bits */
+
+        switch (termiosp->c_cflag & CSIZE)
+          {
+          case CS5:
+            nbits = 5;
+            break;
+
+          case CS6:
+            nbits = 6;
+            break;
+
+          case CS7:
+            nbits = 7;
+            break;
+
+          case CS8:
+            nbits = 8;
+            break;
+#if 0
+          case CS9:
+            nbits = 9;
+            break;
+#endif
+          default:
+            ret = -EINVAL;
+            break;
+          }
+
+        /* Decode parity */
+
+        if ((termiosp->c_cflag & PARENB) != 0)
+          {
+            parity = (termiosp->c_cflag & PARODD) ? 1 : 2;
+          }
+        else
+          {
+            parity = 0;
+          }
+
+        /* Decode stop bits */
+
+        stop2 = (termiosp->c_cflag & CSTOPB) != 0;
+
+#if defined(CONFIG_SERIAL_IFLOWCONTROL) || defined(CONFIG_SERIAL_OFLOWCONTROL)
+        /* Decode flow control */
+
+        flowc = (termiosp->c_cflag & (CCTS_OFLOW | CRTS_IFLOW)) != 0;
+#endif
+        /* Verify that all settings are valid before committing */
+
+        if (ret == OK)
+          {
+            /* Commit */
+
+            priv->baud      = baud;
+            priv->parity    = parity;
+            priv->bits      = nbits;
+            priv->stopbits2 = stop2;
+#if defined(CONFIG_SERIAL_IFLOWCONTROL) || defined(CONFIG_SERIAL_OFLOWCONTROL)
+            priv->flowc     = flowc;
+#endif
+            /* effect the changes immediately - note that we do not
+             * implement TCSADRAIN / TCSAFLUSH
+             */
+
+            imxrt_disableuartint(priv, &ie);
+            ret = imxrt_setup(dev);
+
+            /* Restore the interrupt state */
+
+            imxrt_restoreuartint(priv, ie);
+            priv->ie = ie;
+          }
+      }
+      break;
+#endif /* CONFIG_SERIAL_TERMIOS */
+
     case TIOCSBRK:  /* BSD compatibility: Turn break on, unconditionally */
     case TIOCCBRK:  /* BSD compatibility: Turn break off, unconditionally */
     default: