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Diffstat (limited to 'arch/mips/vr4181/common/serial.c')
-rw-r--r--arch/mips/vr4181/common/serial.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/arch/mips/vr4181/common/serial.c b/arch/mips/vr4181/common/serial.c
new file mode 100644
index 000000000000..3f62c62b107f
--- /dev/null
+++ b/arch/mips/vr4181/common/serial.c
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
+ *
+ * arch/mips/vr4181/common/serial.c
+ * initialize serial port on vr4181.
+ *
+ * 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.
+ *
+ */
+
+/*
+ * [jsun, 010925]
+ * You need to make sure rs_table has at least one element in
+ * drivers/char/serial.c file. There is no good way to do it right
+ * now. A workaround is to include CONFIG_SERIAL_MANY_PORTS in your
+ * configure file, which would gives you 64 ports and wastes 11K ram.
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/serial.h>
+
+#include <asm/vr4181/vr4181.h>
+
+void __init vr4181_init_serial(void)
+{
+ struct serial_struct s;
+
+ /* turn on UART clock */
+ *VR4181_CMUCLKMSK |= VR4181_CMUCLKMSK_MSKSIU;
+
+ /* clear memory */
+ memset(&s, 0, sizeof(s));
+
+ s.line = 0; /* we set the first one */
+ s.baud_base = 1152000;
+ s.irq = VR4181_IRQ_SIU;
+ s.flags = ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST; /* STD_COM_FLAGS */
+ s.iomem_base = (u8*)VR4181_SIURB;
+ s.iomem_reg_shift = 0;
+ s.io_type = SERIAL_IO_MEM;
+ if (early_serial_setup(&s) != 0) {
+ panic("vr4181_init_serial() failed!");
+ }
+}
+