2 files changed, 72 insertions, 0 deletions
diff --git a/arch/mips/loongson/common/Makefile b/arch/mips/loongson/common/Makefile
index 656b3cc0a2a6..d21d1163fad0 100644
--- a/arch/mips/loongson/common/Makefile
+++ b/arch/mips/loongson/common/Makefile
@@ -9,3 +9,4 @@ obj-y += setup.o init.o cmdline.o env.o time.o reset.o irq.o \
 # Early printk support
 #
 obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
+obj-$(CONFIG_SERIAL_8250) += serial.o
diff --git a/arch/mips/loongson/common/serial.c b/arch/mips/loongson/common/serial.c
new file mode 100644
index 000000000000..6d341e426f64
--- /dev/null
+++ b/arch/mips/loongson/common/serial.c
@@ -0,0 +1,71 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2007 Ralf Baechle (ralf@linux-mips.org)
+ *
+ * Copyright (C) 2009 Lemote, Inc.
+ * Author: Yan hua (yanhua@lemote.com)
+ * Author: Wu Zhangjin (wuzj@lemote.com)
+ */
+
+#include <linux/io.h>
+#include <linux/init.h>
+#include <linux/serial_8250.h>
+
+#include <asm/bootinfo.h>
+
+#include <loongson.h>
+#include <machine.h>
+
+#define PORT(int)			\
+{								\
+	.irq		= int,					\
+	.uartclk	= 1843200,				\
+	.iobase		= (LOONGSON_UART_BASE - LOONGSON_PCIIO_BASE),\
+	.iotype		= UPIO_PORT,				\
+	.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,	\
+	.regshift	= 0,					\
+}
+
+#define PORT_M(int)				\
+{								\
+	.irq		= MIPS_CPU_IRQ_BASE + (int),		\
+	.uartclk	= 3686400,				\
+	.iotype		= UPIO_MEM,				\
+	.membase	= (void __iomem *)NULL,			\
+	.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,	\
+	.regshift	= 0,					\
+}
+
+static struct plat_serial8250_port uart8250_data[][2] = {
+	[MACH_LOONGSON_UNKNOWN]         {},
+	[MACH_LEMOTE_FL2E]              {PORT(4), {} },
+	[MACH_LEMOTE_FL2F]              {PORT(3), {} },
+	[MACH_LEMOTE_ML2F7]             {PORT_M(3), {} },
+	[MACH_LEMOTE_YL2F89]            {PORT_M(3), {} },
+	[MACH_DEXXON_GDIUM2F10]         {PORT_M(3), {} },
+	[MACH_LOONGSON_END]             {},
+};
+
+static struct platform_device uart8250_device = {
+	.name = "serial8250",
+	.id = PLAT8250_DEV_PLATFORM,
+	.dev = {
+		.platform_data = uart8250_data[LOONGSON_MACHTYPE],
+		},
+};
+
+static int __init serial_init(void)
+{
+	if (uart8250_data[LOONGSON_MACHTYPE][0].iotype == UPIO_MEM)
+		uart8250_data[LOONGSON_MACHTYPE][0].membase =
+			ioremap_nocache(LOONGSON_UART_BASE, 8);
+
+	platform_device_register(&uart8250_device);
+
+	return 0;
+}
+
+device_initcall(serial_init);