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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/mips/mti-malta/malta-display.c
Initial import
Diffstat (limited to 'arch/mips/mti-malta/malta-display.c')
-rw-r--r--arch/mips/mti-malta/malta-display.c56
1 files changed, 56 insertions, 0 deletions
diff --git a/arch/mips/mti-malta/malta-display.c b/arch/mips/mti-malta/malta-display.c
new file mode 100644
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+++ b/arch/mips/mti-malta/malta-display.c
@@ -0,0 +1,56 @@
+/*
+ * 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.
+ *
+ * Display routines for display messages in MIPS boards ascii display.
+ *
+ * Copyright (C) 1999,2000,2012 MIPS Technologies, Inc.
+ * All rights reserved.
+ * Authors: Carsten Langgaard <carstenl@mips.com>
+ * Steven J. Hill <sjhill@mips.com>
+ */
+#include <linux/compiler.h>
+#include <linux/timer.h>
+#include <linux/io.h>
+
+#include <asm/mips-boards/generic.h>
+
+extern const char display_string[];
+static unsigned int display_count;
+static unsigned int max_display_count;
+
+void mips_display_message(const char *str)
+{
+ static unsigned int __iomem *display = NULL;
+ int i;
+
+ if (unlikely(display == NULL))
+ display = ioremap(ASCII_DISPLAY_POS_BASE, 16*sizeof(int));
+
+ for (i = 0; i <= 14; i += 2) {
+ if (*str)
+ __raw_writel(*str++, display + i);
+ else
+ __raw_writel(' ', display + i);
+ }
+}
+
+static void scroll_display_message(unsigned long data);
+static DEFINE_TIMER(mips_scroll_timer, scroll_display_message, HZ, 0);
+
+static void scroll_display_message(unsigned long data)
+{
+ mips_display_message(&display_string[display_count++]);
+ if (display_count == max_display_count)
+ display_count = 0;
+
+ mod_timer(&mips_scroll_timer, jiffies + HZ);
+}
+
+void mips_scroll_message(void)
+{
+ del_timer_sync(&mips_scroll_timer);
+ max_display_count = strlen(display_string) + 1 - 8;
+ mod_timer(&mips_scroll_timer, jiffies + 1);
+}