1 /* $NetBSD: lcd.c,v 1.2 2008/05/29 14:25:01 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 52 struct lcd_message { 53 char row1[NCOLS]; 54 char row2[NCOLS]; 55 }; 56 57 static uint32_t lcd_base; 58 static const struct lcd_message banner_message = { 59 "NetBSD/cobalt ", 60 "Bootloader " 61 }; 62 static const struct lcd_message failed_message = { 63 "Boot failed! ", 64 "Rebooting... " 65 }; 66 static struct lcd_message loadfile_message = { 67 "Loading: ", 68 " " 69 }; 70 71 static void lcd_puts(const struct lcd_message *); 72 73 void 74 lcd_init(void) 75 { 76 77 lcd_base = MIPS_PHYS_TO_KSEG1(LCD_BASE); 78 } 79 80 void 81 lcd_banner(void) 82 { 83 84 lcd_puts(&banner_message); 85 } 86 87 void 88 lcd_loadfile(const char *file) 89 { 90 91 memcpy(loadfile_message.row2, file, min(NCOLS, strlen(file))); 92 93 lcd_puts(&loadfile_message); 94 } 95 96 void 97 lcd_failed(void) 98 { 99 100 lcd_puts(&failed_message); 101 } 102 103 static void 104 lcd_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