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Diffstat (limited to 'arch/mips/loongson2ef/common/uart_base.c')
-rw-r--r--arch/mips/loongson2ef/common/uart_base.c43
1 files changed, 43 insertions, 0 deletions
diff --git a/arch/mips/loongson2ef/common/uart_base.c b/arch/mips/loongson2ef/common/uart_base.c
new file mode 100644
index 000000000..522bea6ad
--- /dev/null
+++ b/arch/mips/loongson2ef/common/uart_base.c
@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2009 Lemote Inc.
+ * Author: Wu Zhangjin, wuzhangjin@gmail.com
+ */
+
+#include <linux/export.h>
+#include <asm/bootinfo.h>
+#include <asm/setup.h>
+
+#include <loongson.h>
+
+/* raw */
+unsigned long loongson_uart_base;
+/* ioremapped */
+unsigned long _loongson_uart_base;
+
+EXPORT_SYMBOL(loongson_uart_base);
+EXPORT_SYMBOL(_loongson_uart_base);
+
+void prom_init_loongson_uart_base(void)
+{
+ switch (mips_machtype) {
+ case MACH_LEMOTE_FL2E:
+ loongson_uart_base = LOONGSON_PCIIO_BASE + 0x3f8;
+ break;
+ case MACH_LEMOTE_FL2F:
+ case MACH_LEMOTE_LL2F:
+ loongson_uart_base = LOONGSON_PCIIO_BASE + 0x2f8;
+ break;
+ case MACH_LEMOTE_ML2F7:
+ case MACH_LEMOTE_YL2F89:
+ case MACH_DEXXON_GDIUM2F10:
+ case MACH_LEMOTE_NAS:
+ default:
+ /* The CPU provided serial port (LPC) */
+ loongson_uart_base = LOONGSON_LIO1_BASE + 0x3f8;
+ break;
+ }
+
+ _loongson_uart_base = TO_UNCAC(loongson_uart_base);
+ setup_8250_early_printk_port(_loongson_uart_base, 0, 1024);
+}