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      1 /*	$NetBSD: lcd.c,v 1.3 2018/09/04 15:08:30 riastradh 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, uimin(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