sys/arch/cobalt/stand/boot/lcd.c

   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
  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 }