[ARM PATCH] 1670/1: PXA serial driver

Patch from Holger Schurig

PXA Serial port (FFUART, BTUART, STUART) and console support 
 
This patch works perfectly here with "console=ttyS0,115200" in the 
kernel command line. It contains Jean-frederic Clere fix to detect 
STUART and BTUART.

Nico said that I should post it to your patch tracker. It replaces patch 1662/1

drivers/serial/Kconfig

@@ -324,6 +324,29 @@ config SERIAL_UART00_CONSOLE
 	  your boot loader (lilo or loadlin) about how to pass options to the
 	  kernel at boot time.)
 
+config SERIAL_PXA
+	bool "PXA serial port support"
+	depends on ARM && ARCH_PXA
+	select SERIAL_CORE
+	help
+	  If you have a machine based on an Intel XScale PXA2xx CPU you
+	  can enable its onboard serial ports by enabling this option.
+
+config SERIAL_PXA_CONSOLE
+	bool "Console on PXA serial port"
+	depends on SERIAL_PXA
+	select SERIAL_CORE_CONSOLE
+	help
+	  If you have enabled the serial port on the Intel XScale PXA
+	  CPU you can make it the console by answering Y to this option.
+
+	  Even if you say Y here, the currently visible virtual console
+	  (/dev/tty0) will still be used as the system console by default, but
+	  you can alter that using a kernel command line option such as
+	  "console=ttySA0". (Try "man bootparam" or see the documentation of
+	  your boot loader (lilo or loadlin) about how to pass options to the
+	  kernel at boot time.)
+
 config SERIAL_SA1100
 	bool "SA1100 serial port support"
 	depends on ARM && ARCH_SA1100

drivers/serial/Makefile

@@ -19,6 +19,7 @@ obj-$(CONFIG_SERIAL_8250_ACORN) += 8250_acorn.o
 obj-$(CONFIG_SERIAL_ANAKIN) += anakin.o
 obj-$(CONFIG_SERIAL_AMBA) += amba.o
 obj-$(CONFIG_SERIAL_CLPS711X) += clps711x.o
+obj-$(CONFIG_SERIAL_PXA) += pxa.o
 obj-$(CONFIG_SERIAL_SA1100) += sa1100.o
 obj-$(CONFIG_SERIAL_UART00) += uart00.o
 obj-$(CONFIG_SERIAL_SUNCORE) += suncore.o

include/linux/serial_core.h

@@ -46,6 +46,7 @@
  * separate so any additions to the old serial.c that occur before
  * we are merged can be easily merged here.
  */
+#define PORT_PXA	31
 #define PORT_AMBA	32
 #define PORT_CLPS711X	33
 #define PORT_SA1100	34

include/linux/serial_reg.h

@@ -140,6 +140,21 @@
 #define UART_MSR_DCTS	0x01	/* Delta CTS */
 #define UART_MSR_ANY_DELTA 0x0F	/* Any of the delta bits! */
 
+/*
+ * The Intel PXA2xx chip defines those bits
+ */
+#define UART_IER_DMAE	0x80	/* DMA Requests Enable */
+#define UART_IER_UUE	0x40	/* UART Unit Enable */
+#define UART_IER_NRZE	0x20	/* NRZ coding Enable */
+#define UART_IER_RTOIE	0x10	/* Receiver Time Out Interrupt Enable */
+
+#define UART_IIR_TOD	0x08	/* Character Timeout Indication Detected */
+
+#define UART_FCR_PXAR1	0x00	/* receive FIFO treshold = 1 */
+#define UART_FCR_PXAR8	0x40	/* receive FIFO treshold = 8 */
+#define UART_FCR_PXAR16	0x80	/* receive FIFO treshold = 16 */
+#define UART_FCR_PXAR32	0xc0	/* receive FIFO treshold = 32 */
+
 /*
  * These are the definitions for the Extended Features Register
  * (StarTech 16C660 only, when DLAB=1)