Gitweb: http://git.kernel.org/linus/e8be5283881cb96bafb751e1f9ea34c4e6fc2845
Commit: e8be5283881cb96bafb751e1f9ea34c4e6fc2845
Parent: db54ff246eae5acb6b7dffec2c05e682f91e0f4e
Author: Wu Zhangjin <wuzhangjin@gmail.com>
AuthorDate: Fri Oct 16 14:17:18 2009 +0800
Committer: Ralf Baechle <ralf@linux-mips.org>
CommitDate: Thu Dec 17 01:57:04 2009 +0000
MIPS: Loongson: Add serial port support
This patch add serial port support for all of the existing loongson
family machines. most of the board specific part are put in serial.c,
and the base address of the serial ports are defined as macros in
machine.h for sharing it between serial.c and early_printk.c
Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Cc: Linux-MIPS <linux-mips@linux-mips.org>
Cc: yanh@lemote.com
Cc: huhb@lemote.com
Cc: Zhang Le <r0bertz@gentoo.org>
Cc: zhangfx@lemote.com
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---
arch/mips/loongson/common/Makefile | 1 +
arch/mips/loongson/common/serial.c | 71 ++++++++++++++++++++++++++++++++++++
2 files changed, 72 insertions(+), 0 deletions(-)
diff --git a/arch/mips/loongson/common/Makefile b/arch/mips/loongson/common/Makefile
index 656b3cc..d21d116 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 0000000..6d341e4
--- /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);
--
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