mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-19 00:18:51 +09:00
258 lines
5.2 KiB
C
258 lines
5.2 KiB
C
/*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <config.h>
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#include <common.h>
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#include <command.h>
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#include <asm/io.h>
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#include <asm/gpio.h>
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#define LCD_CMD_ADDR 0x50100002
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#define LCD_DATA_ADDR 0x50100003
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#define LCD_BLK_CTRL CPLD_REG1_ADDR
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static char *amcc_logo = "AMCC 405EP TAIHU EVALUATION KIT";
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static int addr_flag = 0x80;
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static void lcd_bl_ctrl(char val)
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{
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out_8((u8 *) LCD_BLK_CTRL, in_8((u8 *) LCD_BLK_CTRL) | val);
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}
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static void lcd_putc(int val)
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{
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int i = 100;
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char addr;
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while (i--) {
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if ((in_8((u8 *) LCD_CMD_ADDR) & 0x80) != 0x80) { /*BF = 1 ?*/
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udelay(50);
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break;
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}
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udelay(50);
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}
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if (in_8((u8 *) LCD_CMD_ADDR) & 0x80) {
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printf("LCD is busy\n");
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return;
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}
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addr = in_8((u8 *) LCD_CMD_ADDR);
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udelay(50);
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if ((addr != 0) && (addr % 0x10 == 0)) {
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addr_flag ^= 0x40;
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out_8((u8 *) LCD_CMD_ADDR, addr_flag);
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}
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udelay(50);
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out_8((u8 *) LCD_DATA_ADDR, val);
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udelay(50);
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}
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static void lcd_puts(char *s)
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{
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char *p = s;
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int i = 100;
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while (i--) {
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if ((in_8((u8 *) LCD_CMD_ADDR) & 0x80) != 0x80) { /*BF = 1 ?*/
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udelay(50);
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break;
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}
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udelay(50);
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}
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if (in_8((u8 *) LCD_CMD_ADDR) & 0x80) {
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printf("LCD is busy\n");
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return;
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}
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while (*p)
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lcd_putc(*p++);
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}
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static void lcd_put_logo(void)
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{
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int i = 100;
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char *p = amcc_logo;
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while (i--) {
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if ((in_8((u8 *) LCD_CMD_ADDR) & 0x80) != 0x80) { /*BF = 1 ?*/
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udelay(50);
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break;
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}
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udelay(50);
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}
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if (in_8((u8 *) LCD_CMD_ADDR) & 0x80) {
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printf("LCD is busy\n");
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return;
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}
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out_8((u8 *) LCD_CMD_ADDR, 0x80);
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while (*p)
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lcd_putc(*p++);
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}
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int lcd_init(void)
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{
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puts("LCD: ");
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out_8((u8 *) LCD_CMD_ADDR, 0x38); /* set function:8-bit,2-line,5x7 font type */
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udelay(50);
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out_8((u8 *) LCD_CMD_ADDR, 0x0f); /* set display on,cursor on,blink on */
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udelay(50);
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out_8((u8 *) LCD_CMD_ADDR, 0x01); /* display clear */
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udelay(2000);
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out_8((u8 *) LCD_CMD_ADDR, 0x06); /* set entry */
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udelay(50);
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lcd_bl_ctrl(0x02); /* set backlight on */
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lcd_put_logo();
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puts("ready\n");
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return 0;
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}
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static int do_lcd_clear (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
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{
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out_8((u8 *) LCD_CMD_ADDR, 0x01);
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udelay(2000);
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return 0;
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}
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static int do_lcd_puts (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
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{
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if (argc < 2) {
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printf("%s", cmdtp->usage);
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return 1;
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}
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lcd_puts(argv[1]);
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return 0;
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}
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static int do_lcd_putc (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
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{
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if (argc < 2) {
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printf("%s", cmdtp->usage);
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return 1;
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}
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lcd_putc((char)argv[1][0]);
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return 0;
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}
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static int do_lcd_cur (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
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{
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ulong count;
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ulong dir;
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char cur_addr;
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if (argc < 3) {
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printf("%s", cmdtp->usage);
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return 1;
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}
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count = simple_strtoul(argv[1], NULL, 16);
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if (count > 31) {
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printf("unable to shift > 0x20\n");
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count = 0;
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}
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dir = simple_strtoul(argv[2], NULL, 16);
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cur_addr = in_8((u8 *) LCD_CMD_ADDR);
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udelay(50);
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if (dir == 0x0) {
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if (addr_flag == 0x80) {
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if (count >= (cur_addr & 0xf)) {
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out_8((u8 *) LCD_CMD_ADDR, 0x80);
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udelay(50);
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count = 0;
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}
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} else {
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if (count >= ((cur_addr & 0x0f) + 0x0f)) {
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out_8((u8 *) LCD_CMD_ADDR, 0x80);
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addr_flag = 0x80;
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udelay(50);
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count = 0x0;
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} else if (count >= ( cur_addr & 0xf)) {
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count -= cur_addr & 0xf ;
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out_8((u8 *) LCD_CMD_ADDR, 0x80 | 0xf);
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addr_flag = 0x80;
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udelay(50);
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}
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}
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} else {
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if (addr_flag == 0x80) {
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if (count >= (0x1f - (cur_addr & 0xf))) {
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count = 0x0;
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addr_flag = 0xc0;
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out_8((u8 *) LCD_CMD_ADDR, 0xc0 | 0xf);
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udelay(50);
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} else if ((count + (cur_addr & 0xf ))>= 0x0f) {
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count = count + (cur_addr & 0xf) - 0x0f;
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addr_flag = 0xc0;
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out_8((u8 *) LCD_CMD_ADDR, 0xc0);
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udelay(50);
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}
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} else if ((count + (cur_addr & 0xf )) >= 0x0f) {
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count = 0x0;
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out_8((u8 *) LCD_CMD_ADDR, 0xC0 | 0x0F);
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udelay(50);
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}
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}
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while (count--) {
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if (dir == 0)
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out_8((u8 *) LCD_CMD_ADDR, 0x10);
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else
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out_8((u8 *) LCD_CMD_ADDR, 0x14);
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udelay(50);
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}
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return 0;
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}
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U_BOOT_CMD(
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lcd_cls, 1, 1, do_lcd_clear,
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"lcd_cls - lcd clear display\n",
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NULL
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);
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U_BOOT_CMD(
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lcd_puts, 2, 1, do_lcd_puts,
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"lcd_puts - display string on lcd\n",
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"<string> - <string> to be displayed\n"
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);
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U_BOOT_CMD(
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lcd_putc, 2, 1, do_lcd_putc,
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"lcd_putc - display char on lcd\n",
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"<char> - <char> to be displayed\n"
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);
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U_BOOT_CMD(
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lcd_cur, 3, 1, do_lcd_cur,
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"lcd_cur - shift cursor on lcd\n",
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"<count> <dir> - shift cursor on lcd <count> times, direction is <dir> \n"
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" <count> - 0..31\n"
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" <dir> - 0=backward 1=forward\n"
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);
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