2 * SPDX-License-Identifier: GPL-2.0+
9 #include <asm/ppc4xx-gpio.h>
11 #define LCD_CMD_ADDR 0x50100002
12 #define LCD_DATA_ADDR 0x50100003
13 #define LCD_BLK_CTRL CPLD_REG1_ADDR
15 static char *amcc_logo = "AMCC 405EP TAIHU EVALUATION KIT";
16 static int addr_flag = 0x80;
18 static void lcd_bl_ctrl(char val)
20 out_8((u8 *) LCD_BLK_CTRL, in_8((u8 *) LCD_BLK_CTRL) | val);
23 static void lcd_putc(int val)
29 if ((in_8((u8 *) LCD_CMD_ADDR) & 0x80) != 0x80) { /*BF = 1 ?*/
36 if (in_8((u8 *) LCD_CMD_ADDR) & 0x80) {
37 printf("LCD is busy\n");
41 addr = in_8((u8 *) LCD_CMD_ADDR);
43 if ((addr != 0) && (addr % 0x10 == 0)) {
45 out_8((u8 *) LCD_CMD_ADDR, addr_flag);
49 out_8((u8 *) LCD_DATA_ADDR, val);
53 static void lcd_puts(char *s)
59 if ((in_8((u8 *) LCD_CMD_ADDR) & 0x80) != 0x80) { /*BF = 1 ?*/
66 if (in_8((u8 *) LCD_CMD_ADDR) & 0x80) {
67 printf("LCD is busy\n");
75 static void lcd_put_logo(void)
81 if ((in_8((u8 *) LCD_CMD_ADDR) & 0x80) != 0x80) { /*BF = 1 ?*/
88 if (in_8((u8 *) LCD_CMD_ADDR) & 0x80) {
89 printf("LCD is busy\n");
93 out_8((u8 *) LCD_CMD_ADDR, 0x80);
101 out_8((u8 *) LCD_CMD_ADDR, 0x38); /* set function:8-bit,2-line,5x7 font type */
103 out_8((u8 *) LCD_CMD_ADDR, 0x0f); /* set display on,cursor on,blink on */
105 out_8((u8 *) LCD_CMD_ADDR, 0x01); /* display clear */
107 out_8((u8 *) LCD_CMD_ADDR, 0x06); /* set entry */
109 lcd_bl_ctrl(0x02); /* set backlight on */
116 static int do_lcd_clear (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
118 out_8((u8 *) LCD_CMD_ADDR, 0x01);
124 static int do_lcd_puts (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
127 return cmd_usage(cmdtp);
134 static int do_lcd_putc (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
137 return cmd_usage(cmdtp);
139 lcd_putc((char)argv[1][0]);
144 static int do_lcd_cur (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
151 return cmd_usage(cmdtp);
153 count = simple_strtoul(argv[1], NULL, 16);
155 printf("unable to shift > 0x20\n");
159 dir = simple_strtoul(argv[2], NULL, 16);
160 cur_addr = in_8((u8 *) LCD_CMD_ADDR);
164 if (addr_flag == 0x80) {
165 if (count >= (cur_addr & 0xf)) {
166 out_8((u8 *) LCD_CMD_ADDR, 0x80);
171 if (count >= ((cur_addr & 0x0f) + 0x0f)) {
172 out_8((u8 *) LCD_CMD_ADDR, 0x80);
176 } else if (count >= ( cur_addr & 0xf)) {
177 count -= cur_addr & 0xf ;
178 out_8((u8 *) LCD_CMD_ADDR, 0x80 | 0xf);
184 if (addr_flag == 0x80) {
185 if (count >= (0x1f - (cur_addr & 0xf))) {
188 out_8((u8 *) LCD_CMD_ADDR, 0xc0 | 0xf);
190 } else if ((count + (cur_addr & 0xf ))>= 0x0f) {
191 count = count + (cur_addr & 0xf) - 0x0f;
193 out_8((u8 *) LCD_CMD_ADDR, 0xc0);
196 } else if ((count + (cur_addr & 0xf )) >= 0x0f) {
198 out_8((u8 *) LCD_CMD_ADDR, 0xC0 | 0x0F);
204 out_8((u8 *) LCD_CMD_ADDR, 0x10);
206 out_8((u8 *) LCD_CMD_ADDR, 0x14);
214 lcd_cls, 1, 1, do_lcd_clear,
220 lcd_puts, 2, 1, do_lcd_puts,
221 "display string on lcd",
222 "<string> - <string> to be displayed"
226 lcd_putc, 2, 1, do_lcd_putc,
227 "display char on lcd",
228 "<char> - <char> to be displayed"
232 lcd_cur, 3, 1, do_lcd_cur,
233 "shift cursor on lcd",
234 "<count> <dir> - shift cursor on lcd <count> times, direction is <dir> \n"
236 " <dir> - 0=backward 1=forward"