1/* $NetBSD: lcd.c,v 1.1 2008/05/28 14:04:07 tsutsui Exp $ */ 2 3/*- 4 * Copyright (c) 2008 Izumi Tsutsui. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#include <lib/libsa/stand.h> 28#include <lib/libkern/libkern.h> 29 30#include <dev/ic/hd44780reg.h> 31 32#include <machine/cpu.h> 33 34#include "boot.h" 35 36#define IREG 0x00 37#define DREG 0x10 38 39#if 0 40#define CSR_READ(base, reg) \ 41 (((*(volatile uint32_t *)((base) + (reg))) >> 24), delay(10)) 42#endif 43 44#define CSR_WRITE(base, reg, val) \ 45 do { \ 46 *(volatile uint32_t *)((base) + (reg)) = ((val) << 24); \ 47 delay(10); \ 48 } while (/* CONSTCOND */ 0) 49 50#define NCOLS 16 51 52struct lcd_message { 53 char row1[NCOLS]; 54 char row2[NCOLS]; 55}; 56 57static uint32_t lcd_base; 58static const struct lcd_message banner_message = { 59 "NetBSD/cobalt ", 60 "Bootloader " 61}; 62static const struct lcd_message failed_message = { 63 "Boot failed! ", 64 "Rebooting... " 65}; 66static struct lcd_message loadfile_message = { 67 "Loading: ", 68 " " 69}; 70 71static void lcd_puts(const struct lcd_message *); 72 73void 74lcd_init(void) 75{ 76 77 lcd_base = MIPS_PHYS_TO_KSEG1(LCD_BASE); 78} 79 80void 81lcd_banner(void) 82{ 83 84 lcd_puts(&banner_message); 85} 86 87void 88lcd_loadfile(const char *file) 89{ 90 91 memcpy(loadfile_message.row2, file, min(NCOLS, strlen(file))); 92 93 lcd_puts(&loadfile_message); 94} 95 96void 97lcd_failed(void) 98{ 99 100 lcd_puts(&failed_message); 101} 102 103static void 104lcd_puts(const struct lcd_message *message) 105{ 106 int i; 107 108 for (i = 0; i < NCOLS; i++) { 109 CSR_WRITE(lcd_base, IREG, cmd_ddramset(HD_ROW1_ADDR + i)); 110 CSR_WRITE(lcd_base, DREG, message->row1[i]); 111 } 112 for (i = 0; i < NCOLS; i++) { 113 CSR_WRITE(lcd_base, IREG, cmd_ddramset(HD_ROW2_ADDR + i)); 114 CSR_WRITE(lcd_base, DREG, message->row2[i]); 115 } 116} 117