X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=drivers%2Fserial%2Fns16550.c;h=fbc37b27e8ea7e4ccb5518a227b7d8d5f6ff6a87;hb=7f673c99c2d8d1aa21996c5b914f06d784b080ca;hp=facadd2f5c3e31f59f09829c46a22cc4feb022e4;hpb=99b603e7143ab7ba8460000675eb46382f1afdc7;p=platform%2Fkernel%2Fu-boot.git

diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c
index facadd2..fbc37b2 100644
--- a/drivers/serial/ns16550.c
+++ b/drivers/serial/ns16550.c
@@ -36,12 +36,31 @@
 
 void NS16550_init(NS16550_t com_port, int baud_divisor)
 {
+#if (defined(CONFIG_SPL_BUILD) && defined(CONFIG_OMAP34XX))
+	/*
+	 * On some OMAP3 devices when UART3 is configured for boot mode before
+	 * SPL starts only THRE bit is set. We have to empty the transmitter
+	 * before initialization starts.
+	 */
+	if ((serial_in(&com_port->lsr) & (UART_LSR_TEMT | UART_LSR_THRE))
+	     == UART_LSR_THRE) {
+		serial_out(UART_LCR_DLAB, &com_port->lcr);
+		serial_out(baud_divisor & 0xff, &com_port->dll);
+		serial_out((baud_divisor >> 8) & 0xff, &com_port->dlm);
+		serial_out(UART_LCRVAL, &com_port->lcr);
+		serial_out(0, &com_port->mdr1);
+	}
+#endif
+
+	while (!(serial_in(&com_port->lsr) & UART_LSR_TEMT))
+		;
+
 	serial_out(CONFIG_SYS_NS16550_IER, &com_port->ier);
-#if (defined(CONFIG_OMAP) && !defined(CONFIG_OMAP3_ZOOM2)) || \
-					defined(CONFIG_AM33XX)
+#if defined(CONFIG_OMAP) || defined(CONFIG_AM33XX) || \
+			defined(CONFIG_TI81XX) || defined(CONFIG_AM43XX)
 	serial_out(0x7, &com_port->mdr1);	/* mode select reset TL16C750*/
 #endif
-	serial_out(UART_LCR_BKSE | UART_LCRVAL, (ulong)&com_port->lcr);
+	serial_out(UART_LCR_BKSE | UART_LCRVAL, &com_port->lcr);
 	serial_out(0, &com_port->dll);
 	serial_out(0, &com_port->dlm);
 	serial_out(UART_LCRVAL, &com_port->lcr);
@@ -52,15 +71,11 @@ void NS16550_init(NS16550_t com_port, int baud_divisor)
 	serial_out((baud_divisor >> 8) & 0xff, &com_port->dlm);
 	serial_out(UART_LCRVAL, &com_port->lcr);
 #if (defined(CONFIG_OMAP) && !defined(CONFIG_OMAP3_ZOOM2)) || \
-	defined(CONFIG_AM33XX) || defined(CONFIG_SOC_DA8XX)
+	defined(CONFIG_AM33XX) || defined(CONFIG_SOC_DA8XX) || \
+	defined(CONFIG_TI81XX) || defined(CONFIG_AM43XX)
 
-#if defined(CONFIG_APTIX)
-	/* /13 mode so Aptix 6MHz can hit 115200 */
-	serial_out(3, &com_port->mdr1);
-#else
 	/* /16 is proper to hit 115200 with 48MHz */
 	serial_out(0, &com_port->mdr1);
-#endif
 #endif /* CONFIG_OMAP */
 }
 
@@ -101,7 +116,7 @@ void NS16550_putc(NS16550_t com_port, char c)
 char NS16550_getc(NS16550_t com_port)
 {
 	while ((serial_in(&com_port->lsr) & UART_LSR_DR) == 0) {
-#ifdef CONFIG_USB_TTY
+#if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_USB_TTY)
 		extern void usbtty_poll(void);
 		usbtty_poll();
 #endif