summaryrefslogtreecommitdiffstats
path: root/board/amcc/taishan/lcd.c
blob: aebddb4b15748b337e421eae3f92bd0820d2236f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
/*
 * (C) Copyright 2007
 * Stefan Roese, DENX Software Engineering, sr@denx.de.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <config.h>
#include <common.h>
#include <command.h>
#include <i2c.h>
#include <miiphy.h>

#ifdef CONFIG_TAISHAN

#define LCD_DELAY_NORMAL_US	100
#define LCD_DELAY_NORMAL_MS	2
#define LCD_CMD_ADDR		((volatile char *)(CFG_EBC2_LCM_BASE))
#define LCD_DATA_ADDR		((volatile char *)(CFG_EBC2_LCM_BASE+1))
#define LCD_BLK_CTRL		((volatile char *)(CFG_EBC1_FPGA_BASE+0x2))

#define mdelay(t)	({unsigned long msec=(t); while (msec--) { udelay(1000);}})

static int g_lcd_init_b = 0;
static char *amcc_logo = "  AMCC TAISHAN  440GX EvalBoard";
static char addr_flag = 0x80;

static void lcd_bl_ctrl(char val)
{
	char cpld_val;

	cpld_val = *LCD_BLK_CTRL;
	*LCD_BLK_CTRL = val | cpld_val;
}

static void lcd_putc(char val)
{
	int i = 100;
	char addr;

	while (i--) {
		if ((*LCD_CMD_ADDR & 0x80) != 0x80) {	/*BF = 1 ? */
			udelay(LCD_DELAY_NORMAL_US);
			break;
		}
		udelay(LCD_DELAY_NORMAL_US);
	}

	if (*LCD_CMD_ADDR & 0x80) {
		printf("LCD is busy\n");
		return;
	}

	addr = *LCD_CMD_ADDR;
	udelay(LCD_DELAY_NORMAL_US);
	if ((addr != 0) && (addr % 0x10 == 0)) {
		addr_flag ^= 0x40;
		*LCD_CMD_ADDR = addr_flag;
	}

	udelay(LCD_DELAY_NORMAL_US);
	*LCD_DATA_ADDR = val;
	udelay(LCD_DELAY_NORMAL_US);
}

static void lcd_puts(char *s)
{
	char *p = s;
	int i = 100;

	while (i--) {
		if ((*LCD_CMD_ADDR & 0x80) != 0x80) {	/*BF = 1 ? */
			udelay(LCD_DELAY_NORMAL_US);
			break;
		}
		udelay(LCD_DELAY_NORMAL_US);
	}

	if (*LCD_CMD_ADDR & 0x80) {
		printf("LCD is busy\n");
		return;
	}

	while (*p)
		lcd_putc(*p++);
}

static void lcd_put_logo(void)
{
	int i = 100;
	char *p = amcc_logo;

	while (i--) {
		if ((*LCD_CMD_ADDR & 0x80) != 0x80) {	/*BF = 1 ? */
			udelay(LCD_DELAY_NORMAL_US);
			break;
		}
		udelay(LCD_DELAY_NORMAL_US);
	}

	if (*LCD_CMD_ADDR & 0x80) {
		printf("LCD is busy\n");
		return;
	}

	*LCD_CMD_ADDR = 0x80;
	while (*p)
		lcd_putc(*p++);
}

int lcd_init(void)
{
	if (g_lcd_init_b == 0) {
		puts("LCD: ");
		mdelay(100);	/* Waiting for the LCD initialize */

		*LCD_CMD_ADDR = 0x38;	/*set function:8-bit,2-line,5x7 font type */
		udelay(LCD_DELAY_NORMAL_US);

		*LCD_CMD_ADDR = 0x0f;	/*set display on,cursor on,blink on */
		udelay(LCD_DELAY_NORMAL_US);

		*LCD_CMD_ADDR = 0x01;	/*display clear */
		mdelay(LCD_DELAY_NORMAL_MS);

		*LCD_CMD_ADDR = 0x06;	/*set entry */
		udelay(LCD_DELAY_NORMAL_US);

		lcd_bl_ctrl(0x02);
		lcd_put_logo();

		puts("  ready\n");
		g_lcd_init_b = 1;
	}

	return 0;
}

static int do_lcd_test(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
	lcd_init();
	return 0;
}

static int do_lcd_clear(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
	*LCD_CMD_ADDR = 0x01;
	mdelay(LCD_DELAY_NORMAL_MS);
	return 0;
}
static int do_lcd_puts(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
	if (argc < 2) {
		printf("%s", cmdtp->usage);
		return 1;
	}
	lcd_puts(argv[1]);
	return 0;
}
static int do_lcd_putc(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
	if (argc < 2) {
		printf("%s", cmdtp->usage);
		return 1;
	}
	lcd_putc((char)argv[1][0]);
	return 0;
}
static int do_lcd_cur(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
	ulong count;
	ulong dir;
	char cur_addr;

	if (argc < 3) {
		printf("%s", cmdtp->usage);
		return 1;
	}

	count = simple_strtoul(argv[1], NULL, 16);
	if (count > 31) {
		printf("unable to shift > 0x20\n");
		count = 0;
	}

	dir = simple_strtoul(argv[2], NULL, 16);
	cur_addr = *LCD_CMD_ADDR;
	udelay(LCD_DELAY_NORMAL_US);
	if (dir == 0x0) {
		if (addr_flag == 0x80) {
			if (count >= (cur_addr & 0xf)) {
				*LCD_CMD_ADDR = 0x80;
				udelay(LCD_DELAY_NORMAL_US);
				count = 0;
			}
		} else {
			if (count >= ((cur_addr & 0x0f) + 0x0f)) {
				*LCD_CMD_ADDR = 0x80;
				addr_flag = 0x80;
				udelay(LCD_DELAY_NORMAL_US);
				count = 0x0;
			} else if (count >= (cur_addr & 0xf)) {
				count -= cur_addr & 0xf;
				*LCD_CMD_ADDR = 0x80 | 0xf;
				addr_flag = 0x80;
				udelay(LCD_DELAY_NORMAL_US);
			}
		}
	} else {
		if (addr_flag == 0x80) {
			if (count >= (0x1f - (cur_addr & 0xf))) {
				count = 0x0;
				addr_flag = 0xc0;
				*LCD_CMD_ADDR = 0xc0 | 0xf;
				udelay(LCD_DELAY_NORMAL_US);
			} else if ((count + (cur_addr & 0xf)) >= 0x0f) {
				count = count + (cur_addr & 0xf) - 0x0f;
				addr_flag = 0xc0;
				*LCD_CMD_ADDR = 0xc0;
				udelay(LCD_DELAY_NORMAL_US);
			}
		} else if ((count + (cur_addr & 0xf)) >= 0x0f) {
			count = 0x0;
			*LCD_CMD_ADDR = 0xc0 | 0xf;
			udelay(LCD_DELAY_NORMAL_US);
		}
	}

	while (count--) {
		if (dir == 0) {
			*LCD_CMD_ADDR = 0x10;
		} else {
			*LCD_CMD_ADDR = 0x14;
		}
		udelay(LCD_DELAY_NORMAL_US);
	}

	return 0;
}

U_BOOT_CMD(lcd_test, 1, 1, do_lcd_test, "lcd_test - lcd test display\n", NULL);
U_BOOT_CMD(lcd_cls, 1, 1, do_lcd_clear, "lcd_cls - lcd clear display\n", NULL);
U_BOOT_CMD(lcd_puts, 2, 1, do_lcd_puts,
	   "lcd_puts - display string on lcd\n",
	   "<string> - <string> to be displayed\n");
U_BOOT_CMD(lcd_putc, 2, 1, do_lcd_putc,
	   "lcd_putc - display char on lcd\n",
	   "<char> - <char> to be displayed\n");
U_BOOT_CMD(lcd_cur, 3, 1, do_lcd_cur,
	   "lcd_cur - shift cursor on lcd\n",
	   "<count> <dir>- shift cursor on lcd <count> times, direction is <dir> \n"
	   " <count> - 0~31\n" " <dir> - 0,backward; 1, forward\n");

#if 0 // test-only
void set_phy_loopback_mode(void)
{
	char devemac2[32];
	char devemac3[32];

	sprintf(devemac2, "%s2", CONFIG_EMAC_DEV_NAME);
	sprintf(devemac3, "%s3", CONFIG_EMAC_DEV_NAME);

#if 0
	unsigned short reg_short;

	miiphy_read(devemac2, 0x1, 1, &reg_short);
	if (reg_short & 0x04) {
		/*
		 * printf("EMAC2 link up,do nothing\n");
		 */
	} else {
		udelay(1000);
		miiphy_write(devemac2, 0x1, 0, 0x6000);
		udelay(1000);
		miiphy_read(devemac2, 0x1, 0, &reg_short);
		if (reg_short != 0x6000) {
			printf
			    ("\nEMAC2 error set LOOPBACK mode error,reg2[0]=%x\n",
			     reg_short);
		}
	}

	miiphy_read(devemac3, 0x3, 1, &reg_short);
	if (reg_short & 0x04) {
		/*
		 * printf("EMAC3 link up,do nothing\n");
		 */
	} else {
		udelay(1000);
		miiphy_write(devemac3, 0x3, 0, 0x6000);
		udelay(1000);
		miiphy_read(devemac3, 0x3, 0, &reg_short);
		if (reg_short != 0x6000) {
			printf
			    ("\nEMAC3 error set LOOPBACK mode error,reg2[0]=%x\n",
			     reg_short);
		}
	}
#else
	/* Set PHY as LOOPBACK MODE, for Linux emac initializing */
	miiphy_write(devemac2, CONFIG_PHY2_ADDR, 0, 0x6000);
	udelay(1000);
	miiphy_write(devemac3, CONFIG_PHY3_ADDR, 0, 0x6000);
	udelay(1000);
#endif
}

void set_phy_normal_mode(void)
{
	char devemac2[32];
	char devemac3[32];
	unsigned short reg_short;

	sprintf(devemac2, "%s2", CONFIG_EMAC_DEV_NAME);
	sprintf(devemac3, "%s3", CONFIG_EMAC_DEV_NAME);

	/* Set phy of EMAC2 */
	miiphy_read(devemac2, CONFIG_PHY2_ADDR, 0x16, &reg_short);
	reg_short &= ~(0x7);
	reg_short |= 0x6;	/* RGMII DLL Delay */
	miiphy_write(devemac2, CONFIG_PHY2_ADDR, 0x16, reg_short);

	miiphy_read(devemac2, CONFIG_PHY2_ADDR, 0x17, &reg_short);
	reg_short &= ~(0x40);
	miiphy_write(devemac2, CONFIG_PHY2_ADDR, 0x17, reg_short);

	miiphy_write(devemac2, CONFIG_PHY2_ADDR, 0x1c, 0x74f0);

	/* Set phy of EMAC3 */
	miiphy_read(devemac3, CONFIG_PHY3_ADDR, 0x16, &reg_short);
	reg_short &= ~(0x7);
	reg_short |= 0x6;	/* RGMII DLL Delay */
	miiphy_write(devemac3, CONFIG_PHY3_ADDR, 0x16, reg_short);

	miiphy_read(devemac3, CONFIG_PHY3_ADDR, 0x17, &reg_short);
	reg_short &= ~(0x40);
	miiphy_write(devemac3, CONFIG_PHY3_ADDR, 0x17, reg_short);

	miiphy_write(devemac3, CONFIG_PHY3_ADDR, 0x1c, 0x74f0);
}
#endif

static int do_led_test_off(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
	volatile unsigned int *GpioOr =
		(volatile unsigned int *)(CFG_PERIPHERAL_BASE + 0x700);
	*GpioOr |= 0x00300000;
	return 0;
}

static int do_led_test_on(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
	volatile unsigned int *GpioOr =
		(volatile unsigned int *)(CFG_PERIPHERAL_BASE + 0x700);
	*GpioOr &= ~0x00300000;
	return 0;
}

U_BOOT_CMD(ledon, 1, 1, do_led_test_on,
	   "ledon - led test light on\n", NULL);

U_BOOT_CMD(ledoff, 1, 1, do_led_test_off,
	   "ledoff - led test light off\n", NULL);
#endif
OpenPOWER on IntegriCloud