117 lines
2.9 KiB
C
117 lines
2.9 KiB
C
/* $NetBSD: lcd.c,v 1.2 2008/05/29 14:25:01 tsutsui Exp $ */
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/*-
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* Copyright (c) 2008 Izumi Tsutsui. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <lib/libsa/stand.h>
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#include <lib/libkern/libkern.h>
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#include <dev/ic/hd44780reg.h>
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#include <machine/cpu.h>
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#include "boot.h"
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#define IREG 0x00
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#define DREG 0x10
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#if 0
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#define CSR_READ(base, reg) \
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(((*(volatile uint32_t *)((base) + (reg))) >> 24), delay(10))
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#endif
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#define CSR_WRITE(base, reg, val) \
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do { \
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*(volatile uint32_t *)((base) + (reg)) = ((val) << 24); \
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delay(10); \
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} while (/* CONSTCOND */ 0)
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#define NCOLS 16
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struct lcd_message {
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char row1[NCOLS];
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char row2[NCOLS];
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};
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static uint32_t lcd_base;
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static const struct lcd_message banner_message = {
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"NetBSD/cobalt ",
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"Bootloader "
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};
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static const struct lcd_message failed_message = {
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"Boot failed! ",
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"Rebooting... "
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};
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static struct lcd_message loadfile_message = {
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"Loading: ",
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" "
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};
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static void lcd_puts(const struct lcd_message *);
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void
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lcd_init(void)
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{
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lcd_base = MIPS_PHYS_TO_KSEG1(LCD_BASE);
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}
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void
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lcd_banner(void)
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{
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lcd_puts(&banner_message);
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}
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void
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lcd_loadfile(const char *file)
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{
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memcpy(loadfile_message.row2, file, min(NCOLS, strlen(file)));
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lcd_puts(&loadfile_message);
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}
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void
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lcd_failed(void)
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{
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lcd_puts(&failed_message);
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}
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static void
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lcd_puts(const struct lcd_message *message)
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{
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int i;
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for (i = 0; i < NCOLS; i++) {
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CSR_WRITE(lcd_base, IREG, cmd_ddramset(HD_ROW1_ADDR + i));
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CSR_WRITE(lcd_base, DREG, message->row1[i]);
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}
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for (i = 0; i < NCOLS; i++) {
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CSR_WRITE(lcd_base, IREG, cmd_ddramset(HD_ROW2_ADDR + i));
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CSR_WRITE(lcd_base, DREG, message->row2[i]);
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}
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}
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