ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/arch/xtensa/platforms/xtfpga/lcd.c b/marvell/linux/arch/xtensa/platforms/xtfpga/lcd.c
new file mode 100644
index 0000000..2f7eb66
--- /dev/null
+++ b/marvell/linux/arch/xtensa/platforms/xtfpga/lcd.c
@@ -0,0 +1,89 @@
+/*
+ * Driver for the LCD display on the Tensilica XTFPGA board family.
+ * http://www.mytechcorp.com/cfdata/productFile/File1/MOC-16216B-B-A0A04.pdf
+ *
+ * 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) 2001, 2006 Tensilica Inc.
+ * Copyright (C) 2015 Cadence Design Systems Inc.
+ */
+
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/io.h>
+
+#include <platform/hardware.h>
+#include <platform/lcd.h>
+
+/* LCD instruction and data addresses. */
+#define LCD_INSTR_ADDR ((char *)IOADDR(CONFIG_XTFPGA_LCD_BASE_ADDR))
+#define LCD_DATA_ADDR (LCD_INSTR_ADDR + 4)
+
+#define LCD_CLEAR 0x1
+#define LCD_DISPLAY_ON 0xc
+
+/* 8bit and 2 lines display */
+#define LCD_DISPLAY_MODE8BIT 0x38
+#define LCD_DISPLAY_MODE4BIT 0x28
+#define LCD_DISPLAY_POS 0x80
+#define LCD_SHIFT_LEFT 0x18
+#define LCD_SHIFT_RIGHT 0x1c
+
+static void lcd_put_byte(u8 *addr, u8 data)
+{
+#ifdef CONFIG_XTFPGA_LCD_8BIT_ACCESS
+ WRITE_ONCE(*addr, data);
+#else
+ WRITE_ONCE(*addr, data & 0xf0);
+ WRITE_ONCE(*addr, (data << 4) & 0xf0);
+#endif
+}
+
+static int __init lcd_init(void)
+{
+ WRITE_ONCE(*LCD_INSTR_ADDR, LCD_DISPLAY_MODE8BIT);
+ mdelay(5);
+ WRITE_ONCE(*LCD_INSTR_ADDR, LCD_DISPLAY_MODE8BIT);
+ udelay(200);
+ WRITE_ONCE(*LCD_INSTR_ADDR, LCD_DISPLAY_MODE8BIT);
+ udelay(50);
+#ifndef CONFIG_XTFPGA_LCD_8BIT_ACCESS
+ WRITE_ONCE(*LCD_INSTR_ADDR, LCD_DISPLAY_MODE4BIT);
+ udelay(50);
+ lcd_put_byte(LCD_INSTR_ADDR, LCD_DISPLAY_MODE4BIT);
+ udelay(50);
+#endif
+ lcd_put_byte(LCD_INSTR_ADDR, LCD_DISPLAY_ON);
+ udelay(50);
+ lcd_put_byte(LCD_INSTR_ADDR, LCD_CLEAR);
+ mdelay(10);
+ lcd_disp_at_pos("XTENSA LINUX", 0);
+ return 0;
+}
+
+void lcd_disp_at_pos(char *str, unsigned char pos)
+{
+ lcd_put_byte(LCD_INSTR_ADDR, LCD_DISPLAY_POS | pos);
+ udelay(100);
+ while (*str != 0) {
+ lcd_put_byte(LCD_DATA_ADDR, *str);
+ udelay(200);
+ str++;
+ }
+}
+
+void lcd_shiftleft(void)
+{
+ lcd_put_byte(LCD_INSTR_ADDR, LCD_SHIFT_LEFT);
+ udelay(50);
+}
+
+void lcd_shiftright(void)
+{
+ lcd_put_byte(LCD_INSTR_ADDR, LCD_SHIFT_RIGHT);
+ udelay(50);
+}
+
+arch_initcall(lcd_init);