[PATCH] serial: add NEC VR4100 series serial support

This patch adds serial driver for NEC VR4100 series serial interface unit.

The new device numbers have been recorded by LANANA.
Signed-off-by: Yoichi Yuasa <yuasa@hh.iij4u.or.jp>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Documentation/devices.txt

@@ -2754,6 +2754,8 @@ Your cooperation is appreciated.
 		 50 = /dev/ttyIOC40		Altix serial card
 		    ...
 		 81 = /dev/ttyIOC431		Altix serial card
+		 82 = /dev/ttyVR0               NEC VR4100 series SIU
+		 83 = /dev/ttyVR1               NEC VR4100 series DSIU
 
 205 char	Low-density serial ports (alternate device)
 		  0 = /dev/culu0		Callout device for ttyLU0
@@ -2788,6 +2790,8 @@ Your cooperation is appreciated.
 		 50 = /dev/cuioc40		Callout device for ttyIOC40
 		    ...
 		 81 = /dev/cuioc431		Callout device for ttyIOC431
+		 82 = /dev/cuvr0                Callout device for ttyVR0
+		 83 = /dev/cuvr1                Callout device for ttyVR1
 
 
 206 char	OnStream SC-x0 tape devices

arch/mips/vr41xx/common/cmu.c

@@ -170,7 +170,7 @@ void vr41xx_mask_clock(vr41xx_clock_t clock)
 		    current_cpu_data.cputype == CPU_VR4121) {
 			cmuclkmsk &= ~MSKDSIU;
 		} else {
-			if (cmuclkmsk & MSKSIU)
+			if (cmuclkmsk & MSKSSIU)
 				cmuclkmsk &= ~MSKDSIU;
 			else
 				cmuclkmsk &= ~(MSKSIU | MSKDSIU);

drivers/serial/Kconfig

@@ -810,4 +810,21 @@ config SERIAL_TXX9_STDSERIAL
 	bool "TX39XX/49XX SIO act as standard serial"
 	depends on !SERIAL_8250 && SERIAL_TXX9
 
+config SERIAL_VR41XX
+	tristate "NEC VR4100 series Serial Interface Unit support"
+	depends on CPU_VR41XX
+	select SERIAL_CORE
+	help
+	  If you have a NEC VR4100 series processor and you want to use
+	  Serial Interface Unit(SIU) or Debug Serial Interface Unit(DSIU)
+	  (not include VR4111/VR4121 DSIU), say Y.  Otherwise, say N.
+
+config SERIAL_VR41XX_CONSOLE
+	bool "Enable NEC VR4100 series Serial Interface Unit console"
+	depends on SERIAL_VR41XX
+	select SERIAL_CORE_CONSOLE
+	help
+	  If you have a NEC VR4100 series processor and you want to use
+	  a console on a serial port, say Y.  Otherwise, say N.
+
 endmenu

drivers/serial/Makefile

@@ -49,4 +49,5 @@ obj-$(CONFIG_SERIAL_M32R_SIO) += m32r_sio.o
 obj-$(CONFIG_SERIAL_MPSC) += mpsc.o
 obj-$(CONFIG_ETRAX_SERIAL) += crisv10.o
 obj-$(CONFIG_SERIAL_TXX9) += serial_txx9.o
+obj-$(CONFIG_SERIAL_VR41XX) += vr41xx_siu.o
 obj-$(CONFIG_BLK_DEV_SGIIOC4) += ioc4_serial.o

include/asm-mips/vr41xx/vr41xx.h

@@ -250,8 +250,6 @@ enum {
 /*
  * Serial Interface Unit
  */
-extern void vr41xx_siu_init(void);
-extern int vr41xx_serial_ports;
 
 /* SIU interfaces */
 typedef enum {

include/linux/serial_core.h

@@ -106,6 +106,10 @@
 /* TXX9 type number */
 #define PORT_TXX9       64
 
+/* NEC VR4100 series SIU/DSIU */
+#define PORT_VR41XX_SIU		65
+#define PORT_VR41XX_DSIU	66
+
 #ifdef __KERNEL__
 
 #include <linux/config.h>