aboutsummaryrefslogtreecommitdiff
path: root/board/trab/trab.c
blob: e8dfd2ceb0b1476dbff743506865e03b885bc664 (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
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
/*
 * (C) Copyright 2002
 * Gary Jennejohn, DENX Software Engineering, <gj@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
 */

/* #define DEBUG */

#include <common.h>
#include <malloc.h>
#include <s3c2400.h>
#include <command.h>

/* ------------------------------------------------------------------------- */

#ifdef CFG_BRIGHTNESS
static void spi_init(void);
static void wait_transmit_done(void);
static void tsc2000_write(unsigned int page, unsigned int reg,
						  unsigned int data);
static void tsc2000_set_brightness(void);
#endif
#ifdef CONFIG_MODEM_SUPPORT
static int key_pressed(void);
extern void disable_putc(void);
extern int do_mdm_init; /* defined in common/main.c */

/*
 * We need a delay of at least 500 us after turning on the VFD clock
 * before we can read any useful information for the CPLD controlling
 * the keyboard switches. Let's play safe and wait 5 ms. The problem
 * is that timers are not available yet, so we use a manually timed
 * loop.
 */
#define KBD_MDELAY	5000
static void udelay_no_timer (int usec)
{
	DECLARE_GLOBAL_DATA_PTR;

	int i;
	int delay = usec * 3;

	for (i = 0; i < delay; i ++) gd->bd->bi_arch_number = MACH_TYPE_TRAB;
}
#endif /* CONFIG_MODEM_SUPPORT */

/*
 * Miscellaneous platform dependent initialisations
 */

int board_init ()
{
#if defined(CONFIG_VFD)
	extern int vfd_init_clocks(void);
#endif
	DECLARE_GLOBAL_DATA_PTR;
	S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER();
	S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO();

	/* memory and cpu-speed are setup before relocation */
#ifdef CONFIG_TRAB_50MHZ
	/* change the clock to be 50 MHz 1:1:1 */
	/* MDIV:0x5c PDIV:4 SDIV:2 */
	clk_power->MPLLCON = 0x5c042;
	clk_power->CLKDIVN = 0;
#else
	/* change the clock to be 133 MHz 1:2:4 */
	/* MDIV:0x7d PDIV:4 SDIV:1 */
	clk_power->MPLLCON = 0x7d041;
	clk_power->CLKDIVN = 3;
#endif

	/* set up the I/O ports */
	gpio->PACON = 0x3ffff;
	gpio->PBCON = 0xaaaaaaaa;
	gpio->PBUP  = 0xffff;
	/* INPUT nCTS0 nRTS0 TXD[1] TXD[0] RXD[1] RXD[0]	*/
	/*  00,    10,      10,      10,      10,      10,      10 	*/
	gpio->PFCON = (2<<0) | (2<<2) | (2<<4) | (2<<6) | (2<<8) | (2<<10);
#ifdef CONFIG_HWFLOW
	/* do not pull up RXD0, RXD1, TXD0, TXD1, CTS0, RTS0 */
	gpio->PFUP  = (1<<0) | (1<<1) | (1<<2) | (1<<3) | (1<<4) | (1<<5);
#else
	/* do not pull up RXD0, RXD1, TXD0, TXD1 */
	gpio->PFUP  = (1<<0) | (1<<1) | (1<<2) | (1<<3);
#endif
	gpio->PGCON = 0x0;
	gpio->PGUP  = 0x0;
	gpio->OPENCR= 0x0;

	/* suppress flicker of the VFDs */
	gpio->MISCCR = 0x40;
	gpio->PFCON |= (2<<12);

	gd->bd->bi_arch_number = MACH_TYPE_TRAB;

	/* adress of boot parameters */
	gd->bd->bi_boot_params = 0x0c000100;

	/* Make sure both buzzers are turned off */
	gpio->PDCON |= 0x5400;
	gpio->PDDAT &= ~0xE0;

#ifdef CONFIG_VFD
	vfd_init_clocks();
#endif /* CONFIG_VFD */

#ifdef CONFIG_MODEM_SUPPORT
	udelay_no_timer (KBD_MDELAY);

	if (key_pressed()) {
		disable_putc();	/* modem doesn't understand banner etc */
		do_mdm_init = 1;
	}
#endif	/* CONFIG_MODEM_SUPPORT */

#ifdef CONFIG_DRIVER_S3C24X0_I2C
	/* Configure I/O ports PG5 und PG6 for I2C */
 	gpio->PGCON = (gpio->PGCON & 0x003c00) | 0x003c00;
#endif /* CONFIG_DRIVER_S3C24X0_I2C */

	return 0;
}

int dram_init (void)
{
	DECLARE_GLOBAL_DATA_PTR;

	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
	gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
	return 0;
}

/*-----------------------------------------------------------------------
 * Keyboard Controller
 */

/* Maximum key number */
#define KEYBD_KEY_NUM		4

#define KBD_DATA	(((*(volatile ulong *)0x04020000) >> 16) & 0xF)

static uchar *key_match (ulong);

int misc_init_r (void)
{
	ulong kbd_data = KBD_DATA;
	uchar keybd_env[KEYBD_KEY_NUM + 1];
	uchar *str;
	int i;

#ifdef CONFIG_AUTO_UPDATE
	extern int do_auto_update(void);
	/* this has priority over all else */
	do_auto_update();
#endif

	for (i = 0; i < KEYBD_KEY_NUM; ++i) {
		keybd_env[i] = '0' + ((kbd_data >> i) & 1);
	}
	keybd_env[i] = '\0';
	debug ("** Setting keybd=\"%s\"\n", keybd_env);
	setenv ("keybd", keybd_env);

	str = strdup (key_match (kbd_data));	/* decode keys */

#ifdef CONFIG_PREBOOT	/* automatically configure "preboot" command on key match */
	debug ("** Setting preboot=\"%s\"\n", str);
	setenv ("preboot", str);	/* set or delete definition */
#endif /* CONFIG_PREBOOT */
	if (str != NULL) {
		free (str);
	}

#ifdef CFG_BRIGHTNESS
	tsc2000_set_brightness();
#endif
	return (0);
}

#ifdef CONFIG_PREBOOT

static uchar kbd_magic_prefix[] = "key_magic";
static uchar kbd_command_prefix[] = "key_cmd";

static int compare_magic (ulong kbd_data, uchar *str)
{
	uchar key_mask;

	debug ("compare_magic: kbd: %04lx  str: \"%s\"\n",kbd_data,str);
	for (; *str; str++)
	{
		uchar c = *str - '1';

		if (c >= KEYBD_KEY_NUM)		/* bad key number */
			return -1;

		key_mask = 1 << c;

		if (!(kbd_data & key_mask)) {	/* key not pressed */
			debug ( "compare_magic: "
				"kbd: %04lx mask: %04lx - key not pressed\n",
				kbd_data, key_mask );
			return -1;
		}

		kbd_data &= ~key_mask;
	}

	if (kbd_data) {				/* key(s) not released */
		debug ( "compare_magic: "
			"kbd: %04lx - key(s) not released\n", kbd_data);
		return -1;
	}

	return 0;
}

/*-----------------------------------------------------------------------
 * Check if pressed key(s) match magic sequence,
 * and return the command string associated with that key(s).
 *
 * If no key press was decoded, NULL is returned.
 *
 * Note: the first character of the argument will be overwritten with
 * the "magic charcter code" of the decoded key(s), or '\0'.
 *
 *
 * Note: the string points to static environment data and must be
 * saved before you call any function that modifies the environment.
 */
static uchar *key_match (ulong kbd_data)
{
	uchar magic[sizeof (kbd_magic_prefix) + 1];
	uchar cmd_name[sizeof (kbd_command_prefix) + 1];
	uchar *suffix;
	uchar *kbd_magic_keys;

	/*
	 * The following string defines the characters that can pe appended
	 * to "key_magic" to form the names of environment variables that
	 * hold "magic" key codes, i. e. such key codes that can cause
	 * pre-boot actions. If the string is empty (""), then only
	 * "key_magic" is checked (old behaviour); the string "125" causes
	 * checks for "key_magic1", "key_magic2" and "key_magic5", etc.
	 */
	if ((kbd_magic_keys = getenv ("magic_keys")) == NULL)
		kbd_magic_keys = "";

	debug ("key_match: magic_keys=\"%s\"\n", kbd_magic_keys);

	/* loop over all magic keys;
	 * use '\0' suffix in case of empty string
	 */
	for (suffix=kbd_magic_keys; *suffix || suffix==kbd_magic_keys; ++suffix)
	{
		sprintf (magic, "%s%c", kbd_magic_prefix, *suffix);

		debug ("key_match: magic=\"%s\"\n",
			getenv(magic) ? getenv(magic) : "<UNDEFINED>");

		if (compare_magic(kbd_data, getenv(magic)) == 0)
		{
			sprintf (cmd_name, "%s%c", kbd_command_prefix, *suffix);
			debug ("key_match: cmdname %s=\"%s\"\n",
				cmd_name,
				getenv (cmd_name) ?
					getenv (cmd_name) :
					"<UNDEFINED>");
			return (getenv (cmd_name));
		}
	}
	debug ("key_match: no match\n");
	return (NULL);
}
#endif							/* CONFIG_PREBOOT */

/* Read Keyboard status */
int do_kbd (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
	ulong kbd_data = KBD_DATA;
	uchar keybd_env[KEYBD_KEY_NUM + 1];
	int i;

	puts ("Keys:");
	for (i = 0; i < KEYBD_KEY_NUM; ++i) {
		keybd_env[i] = '0' + ((kbd_data >> i) & 1);
		printf (" %c", keybd_env[i]);
	}
	keybd_env[i] = '\0';
	putc ('\n');
	setenv ("keybd", keybd_env);
	return 0;
}

U_BOOT_CMD(
 	kbd,	1,	1,	do_kbd,
 	"kbd     - read keyboard status\n",
 	NULL
);

#ifdef CONFIG_MODEM_SUPPORT
static int key_pressed(void)
{
	return (compare_magic(KBD_DATA, CONFIG_MODEM_KEY_MAGIC) == 0);
}
#endif	/* CONFIG_MODEM_SUPPORT */

#ifdef CFG_BRIGHTNESS

static inline void SET_CS_TOUCH(void)
{
	S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO();

	gpio->PDDAT &= 0x5FF;
}

static inline void CLR_CS_TOUCH(void)
{
	S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO();

	gpio->PDDAT |= 0x200;
}

static void spi_init(void)
{
	S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO();
	S3C24X0_SPI * const spi = S3C24X0_GetBase_SPI();
	int i;

	/* Configure I/O ports. */
 	gpio->PDCON = (gpio->PDCON & 0xF3FFFF) | 0x040000;
	gpio->PGCON = (gpio->PGCON & 0x0F3FFF) | 0x008000;
	gpio->PGCON = (gpio->PGCON & 0x0CFFFF) | 0x020000;
	gpio->PGCON = (gpio->PGCON & 0x03FFFF) | 0x080000;

	CLR_CS_TOUCH();

	spi->ch[0].SPPRE = 0x1F; /* Baudrate ca. 514kHz */
	spi->ch[0].SPPIN = 0x01;  /* SPI-MOSI holds Level after last bit */
	spi->ch[0].SPCON = 0x1A;  /* Polling, Prescaler, Master, CPOL=0, CPHA=1 */

	/* Dummy byte ensures clock to be low. */
	for (i = 0; i < 10; i++) {
		spi->ch[0].SPTDAT = 0xFF;
	}
	wait_transmit_done();
}

static void wait_transmit_done(void)
{
	S3C24X0_SPI * const spi = S3C24X0_GetBase_SPI();

	while (!(spi->ch[0].SPSTA & 0x01)); /* wait until transfer is done */
}

static void tsc2000_write(unsigned int page, unsigned int reg,
						  unsigned int data)
{
	S3C24X0_SPI * const spi = S3C24X0_GetBase_SPI();
	unsigned int command;

	SET_CS_TOUCH();
	command = 0x0000;
	command |= (page << 11);
	command |= (reg << 5);

	spi->ch[0].SPTDAT = (command & 0xFF00) >> 8;
	wait_transmit_done();
	spi->ch[0].SPTDAT = (command & 0x00FF);
	wait_transmit_done();
	spi->ch[0].SPTDAT = (data & 0xFF00) >> 8;
	wait_transmit_done();
	spi->ch[0].SPTDAT = (data & 0x00FF);
	wait_transmit_done();

	CLR_CS_TOUCH();
}

static void tsc2000_set_brightness(void)
{
	uchar tmp[10];
	int i, br;

	spi_init();
	tsc2000_write(1, 2, 0x0); /* Power up DAC */

	i = getenv_r("brightness", tmp, sizeof(tmp));
	br = (i > 0)
		? (int) simple_strtoul (tmp, NULL, 10)
		: CFG_BRIGHTNESS;

	tsc2000_write(0, 0xb, br & 0xff);
}
#endif