mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-15 12:08:27 +02:00
e0e5bd88de
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@22463 3c298f89-4303-0410-b956-a3cf2f4a3e73
83 lines
2.8 KiB
Diff
83 lines
2.8 KiB
Diff
From d9d3dc9a5a28b2bbb82fedca63aadae8ca540e94 Mon Sep 17 00:00:00 2001
|
|
From: Lars-Peter Clausen <lars@metafoo.de>
|
|
Date: Sat, 19 Jun 2010 04:08:16 +0000
|
|
Subject: [PATCH] MIPS: JZ4740: Add serial support
|
|
|
|
The JZ4740 UART interface is almost 16550 compatible.
|
|
The UART module needs to be enabled by setting a bit in the FCR register
|
|
and it has support for receive timeout interrupts. Instead of adding yet
|
|
another machine specific quirk to the 8250 serial driver we provide a
|
|
serial_out implementation which sets the required additional flags.
|
|
|
|
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
|
|
Cc: linux-mips@linux-mips.org
|
|
Cc: linux-kernel@vger.kernel.org
|
|
Patchwork: https://patchwork.linux-mips.org/patch/1403/
|
|
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
|
---
|
|
arch/mips/jz4740/serial.c | 33 +++++++++++++++++++++++++++++++++
|
|
arch/mips/jz4740/serial.h | 20 ++++++++++++++++++++
|
|
2 files changed, 53 insertions(+), 0 deletions(-)
|
|
create mode 100644 arch/mips/jz4740/serial.c
|
|
create mode 100644 arch/mips/jz4740/serial.h
|
|
|
|
--- /dev/null
|
|
+++ b/arch/mips/jz4740/serial.c
|
|
@@ -0,0 +1,33 @@
|
|
+/*
|
|
+ * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
|
|
+ * JZ4740 serial support
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify it
|
|
+ * under the terms of the GNU General Public License as published by the
|
|
+ * Free Software Foundation; either version 2 of the License, or (at your
|
|
+ * option) any later version.
|
|
+ *
|
|
+ * You should have received a copy of the GNU General Public License along
|
|
+ * with this program; if not, write to the Free Software Foundation, Inc.,
|
|
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
+ *
|
|
+ */
|
|
+
|
|
+#include <linux/io.h>
|
|
+#include <linux/serial_core.h>
|
|
+#include <linux/serial_reg.h>
|
|
+
|
|
+void jz4740_serial_out(struct uart_port *p, int offset, int value)
|
|
+{
|
|
+ switch (offset) {
|
|
+ case UART_FCR:
|
|
+ value |= 0x10; /* Enable uart module */
|
|
+ break;
|
|
+ case UART_IER:
|
|
+ value |= (value & 0x4) << 2;
|
|
+ break;
|
|
+ default:
|
|
+ break;
|
|
+ }
|
|
+ writeb(value, p->membase + (offset << p->regshift));
|
|
+}
|
|
--- /dev/null
|
|
+++ b/arch/mips/jz4740/serial.h
|
|
@@ -0,0 +1,20 @@
|
|
+/*
|
|
+ * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
|
|
+ * JZ4740 serial support
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify it
|
|
+ * under the terms of the GNU General Public License as published by the
|
|
+ * Free Software Foundation; either version 2 of the License, or (at your
|
|
+ * option) any later version.
|
|
+ *
|
|
+ * You should have received a copy of the GNU General Public License along
|
|
+ * with this program; if not, write to the Free Software Foundation, Inc.,
|
|
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
+ *
|
|
+ */
|
|
+
|
|
+#ifndef __MIPS_JZ4740_SERIAL_H__
|
|
+
|
|
+void jz4740_serial_out(struct uart_port *p, int offset, int value);
|
|
+
|
|
+#endif
|