Add support for VersaLink modem control on DCE ports 0 and 3

SVN-Revision: 7144
17 years ago · 91cdb3476d
parent 77a291b463
commit 91cdb3476d
1 changed files with 71 additions and 0 deletions
--- a/target/linux/at91-2.6/patches/008-fdl-serial.patch
+++ b/target/linux/at91-2.6/patches/008-fdl-serial.patch
@ -0,0 +1,71 @@
+--- linux-2.6.19.2.old/drivers/serial/atmel_serial.c	2007-05-01 13:08:03.000000000 +0200
+++ linux-2.6.19.2/drivers/serial/atmel_serial.c	2007-05-09 10:21:45.000000000 +0200
+@@ -173,6 +173,34 @@
+ 				at91_set_gpio_value(AT91_PIN_PA21, 0);
+ 			else
+ 				at91_set_gpio_value(AT91_PIN_PA21, 1);
+
+			/* 
+			 * FDL VersaLink adds GPIOS to provide full modem control on
+			 * USART 0 - Drive DTR and RI pins manually
+			 */
+			if (mctrl & TIOCM_DTR)
+				at91_set_gpio_value(AT91_PIN_PA19, 0);
+			else
+				at91_set_gpio_value(AT91_PIN_PA19, 1);
+			if (mctrl & TIOCM_RI)
+				at91_set_gpio_value(AT91_PIN_PB7, 0);
+			else
+				at91_set_gpio_value(AT91_PIN_PB7, 1);
+		}
+
+		/* 
+		 * FDL VersaLink adds GPIOS to provide full modem control on
+		 * USART 3 - Drive DTR and RI pins manually
+		 */
+		if (port->mapbase == AT91RM9200_BASE_US3) {
+			if (mctrl & TIOCM_DTR)
+				at91_set_gpio_value(AT91_PIN_PA24, 0);
+			else
+				at91_set_gpio_value(AT91_PIN_PA24, 1);
+			if (mctrl & TIOCM_RI)
+				at91_set_gpio_value(AT91_PIN_PB2, 0);
+			else
+				at91_set_gpio_value(AT91_PIN_PB2, 1);
+ 		}
+ 	}
+ #endif
+@@ -210,8 +238,14 @@
+ 	/*
+ 	 * The control signals are active low.
+ 	 */
+-	if (!(status & ATMEL_US_DCD))
+-		ret |= TIOCM_CD;
+
+	/* 
+	 * Ignore DCD reister for USARTS 0 and 3 as FDL Versalink uses
+	 * GPIO's for these signals
+	 */
+	if (!(port->mapbase == AT91RM9200_BASE_US0 || port->mapbase == AT91RM9200_BASE_US3))
+		if (!(status & ATMEL_US_DCD))
+			ret |= TIOCM_CD;
+ 	if (!(status & ATMEL_US_CTS))
+ 		ret |= TIOCM_CTS;
+ 	if (!(status & ATMEL_US_DSR))
+@@ -219,6 +253,16 @@
+ 	if (!(status & ATMEL_US_RI))
+ 		ret |= TIOCM_RI;
+ 
+	/*
+	 * Read the GPIO's for the FDL VersaLink special case
+	 */
+	if (port->mapbase == AT91RM9200_BASE_US0)
+		if (!(at91_get_gpio_value(AT91_PIN_PB6)))
+			ret |= TIOCM_CD;
+	if (port->mapbase == AT91RM9200_BASE_US3)
+		if (!(at91_get_gpio_value(AT91_PIN_PB29)))
+			ret |= TIOCM_CD;
+
+ 	return ret;
+ }
+