4 files changed, 65 insertions, 0 deletions

diff --git a/drivers/serial/8250_exar_st16c554.c b/drivers/serial/8250_exar_st16c554.c
new file mode 100644
index 000000000000..567143ace159
--- /dev/null
+++ b/drivers/serial/8250_exar_st16c554.c
@@ -0,0 +1,52 @@
+/*
+ *  linux/drivers/serial/8250_exar.c
+ *
+ *  Written by Paul B Schroeder < pschroeder "at" uplogix "dot" com >
+ *  Based on 8250_boca.
+ *
+ *  Copyright (C) 2005 Russell King.
+ *  Data taken from include/asm-i386/serial.h
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/serial_8250.h>
+
+#define PORT(_base,_irq)                                \
+        {                                               \
+                .iobase         = _base,                \
+                .irq            = _irq,                 \
+                .uartclk        = 1843200,              \
+                .iotype         = UPIO_PORT,            \
+                .flags          = UPF_BOOT_AUTOCONF,    \
+        }
+
+static struct plat_serial8250_port exar_data[] = {
+        PORT(0x100, 5),
+        PORT(0x108, 5),
+        PORT(0x110, 5),
+        PORT(0x118, 5),
+        { },
+};
+
+static struct platform_device exar_device = {
+        .name                   = "serial8250",
+        .id                     = PLAT8250_DEV_EXAR_ST16C554,
+        .dev                    = {
+                .platform_data  = exar_data,
+        },
+};
+
+static int __init exar_init(void)
+{
+        return platform_device_register(&exar_device);
+}
+
+module_init(exar_init);
+
+MODULE_AUTHOR("Paul B Schroeder");
+MODULE_DESCRIPTION("8250 serial probe module for Exar cards");
+MODULE_LICENSE("GPL");
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index e936c91640b4..fc12d5df10e2 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -210,6 +210,17 @@ config SERIAL_8250_BOCA
           To compile this driver as a module, choose M here: the module
           will be called 8250_boca.
 
+config SERIAL_8250_EXAR_ST16C554
+        tristate "Support Exar ST16C554/554D Quad UART"
+        depends on SERIAL_8250 != n && ISA && SERIAL_8250_MANY_PORTS
+        help
+          The Uplogix Envoy TU301 uses this Exar Quad UART.  If you are
+          tinkering with your Envoy TU301, or have a machine with this UART,
+          say Y here.
+
+          To compile this driver as a module, choose M here: the module
+          will be called 8250_exar_st16c554.
+
 config SERIAL_8250_HUB6
         tristate "Support Hub6 cards"
         depends on SERIAL_8250 != n && ISA && SERIAL_8250_MANY_PORTS
diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile
index 0dba0017a006..df3632cd7df9 100644
--- a/drivers/serial/Makefile
+++ b/drivers/serial/Makefile
@@ -17,6 +17,7 @@ obj-$(CONFIG_SERIAL_8250_CONSOLE) += 8250_early.o
 obj-$(CONFIG_SERIAL_8250_FOURPORT) += 8250_fourport.o
 obj-$(CONFIG_SERIAL_8250_ACCENT) += 8250_accent.o
 obj-$(CONFIG_SERIAL_8250_BOCA) += 8250_boca.o
+obj-$(CONFIG_SERIAL_8250_EXAR_ST16C554) += 8250_exar_st16c554.o
 obj-$(CONFIG_SERIAL_8250_HUB6) += 8250_hub6.o
 obj-$(CONFIG_SERIAL_8250_MCA) += 8250_mca.o
 obj-$(CONFIG_SERIAL_8250_AU1X00) += 8250_au1x00.o
diff --git a/include/linux/serial_8250.h b/include/linux/serial_8250.h
index 8e9681413726..71310d80c09a 100644
--- a/include/linux/serial_8250.h
+++ b/include/linux/serial_8250.h
@@ -41,6 +41,7 @@ enum {
         PLAT8250_DEV_FOURPORT,
         PLAT8250_DEV_ACCENT,
         PLAT8250_DEV_BOCA,
+        PLAT8250_DEV_EXAR_ST16C554,
         PLAT8250_DEV_HUB6,
         PLAT8250_DEV_MCA,
         PLAT8250_DEV_AU1X00,