summaryrefslogtreecommitdiffstats
path: root/board/a4m072/a4m072.c
blob: c5d161bca3bcc6df2fb228d380e0e2482c2e5d90 (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
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
/*
 * (C) Copyright 2003
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * (C) Copyright 2004
 * Mark Jonas, Freescale Semiconductor, mark.jonas@motorola.com.
 *
 * (C) Copyright 2010
 * Sergei Poselenov, Emcraft Systems, sposelenov@emcraft.com.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <mpc5xxx.h>
#include <pci.h>
#include <asm/processor.h>
#include <asm/io.h>
#include <libfdt.h>
#include <netdev.h>
#include <led-display.h>
#include <linux/err.h>

#include "mt46v32m16.h"

#ifndef CONFIG_SYS_RAMBOOT
static void sdram_start (int hi_addr)
{
	long hi_addr_bit = hi_addr ? 0x01000000 : 0;
	long control = SDRAM_CONTROL | hi_addr_bit;

	/* unlock mode register */
	out_be32((void *)MPC5XXX_SDRAM_CTRL, control | 0x80000000);
	__asm__ volatile ("sync");

	/* precharge all banks */
	out_be32((void *)MPC5XXX_SDRAM_CTRL, control | 0x80000002);
	__asm__ volatile ("sync");

#if SDRAM_DDR
	/* set mode register: extended mode */
	out_be32((void *)MPC5XXX_SDRAM_MODE, SDRAM_EMODE);
	__asm__ volatile ("sync");

	/* set mode register: reset DLL */
	out_be32((void *)MPC5XXX_SDRAM_MODE, SDRAM_MODE | 0x04000000);
	__asm__ volatile ("sync");
#endif

	/* precharge all banks */
	out_be32((void *)MPC5XXX_SDRAM_CTRL, control | 0x80000002);
	__asm__ volatile ("sync");

	/* auto refresh */
	out_be32((void *)MPC5XXX_SDRAM_CTRL, control | 0x80000004);
	__asm__ volatile ("sync");

	/* set mode register */
	out_be32((void *)MPC5XXX_SDRAM_MODE, SDRAM_MODE);
	__asm__ volatile ("sync");

	/* normal operation */
	out_be32((void *)MPC5XXX_SDRAM_CTRL, control);
	__asm__ volatile ("sync");
}
#endif

/*
 * ATTENTION: Although partially referenced initdram does NOT make real use
 *            use of CONFIG_SYS_SDRAM_BASE. The code does not work if CONFIG_SYS_SDRAM_BASE
 *            is something else than 0x00000000.
 */

phys_size_t initdram (int board_type)
{
	ulong dramsize = 0;
	uint svr, pvr;

#ifndef CONFIG_SYS_RAMBOOT
	ulong test1, test2;

	/* setup SDRAM chip selects */
	out_be32((void *)MPC5XXX_SDRAM_CS0CFG, 0x0000001e); /* 2GB at 0x0 */
	out_be32((void *)MPC5XXX_SDRAM_CS1CFG, 0x80000000); /* disabled */
	__asm__ volatile ("sync");

	/* setup config registers */
	out_be32((void *)MPC5XXX_SDRAM_CONFIG1, SDRAM_CONFIG1);
	out_be32((void *)MPC5XXX_SDRAM_CONFIG2, SDRAM_CONFIG2);
	__asm__ volatile ("sync");

#if SDRAM_DDR
	/* set tap delay */
	out_be32((void *)MPC5XXX_CDM_PORCFG, SDRAM_TAPDELAY);
	__asm__ volatile ("sync");
#endif

	/* find RAM size using SDRAM CS0 only */
	sdram_start(0);
	test1 = get_ram_size((long *)CONFIG_SYS_SDRAM_BASE, 0x80000000);
	sdram_start(1);
	test2 = get_ram_size((long *)CONFIG_SYS_SDRAM_BASE, 0x80000000);
	if (test1 > test2) {
		sdram_start(0);
		dramsize = test1;
	} else {
		dramsize = test2;
	}

	/* memory smaller than 1MB is impossible */
	if (dramsize < (1 << 20)) {
		dramsize = 0;
	}

	/* set SDRAM CS0 size according to the amount of RAM found */
	if (dramsize > 0) {
		out_be32((void *)MPC5XXX_SDRAM_CS0CFG,
				 0x13 + __builtin_ffs(dramsize >> 20) - 1);
	} else {
		out_be32((void *)MPC5XXX_SDRAM_CS0CFG, 0); /* disabled */
	}

#else /* CONFIG_SYS_RAMBOOT */

	/* retrieve size of memory connected to SDRAM CS0 */
	dramsize = in_be32((void *)MPC5XXX_SDRAM_CS0CFG) & 0xFF;
	if (dramsize >= 0x13) {
		dramsize = (1 << (dramsize - 0x13)) << 20;
	} else {
		dramsize = 0;
	}

#endif /* CONFIG_SYS_RAMBOOT */

	/*
	 * On MPC5200B we need to set the special configuration delay in the
	 * DDR controller. Please refer to Freescale's AN3221 "MPC5200B SDRAM
	 * Initialization and Configuration", 3.3.1 SDelay--MBAR + 0x0190:
	 *
	 * "The SDelay should be written to a value of 0x00000004. It is
	 * required to account for changes caused by normal wafer processing
	 * parameters."
	 */
	svr = get_svr();
	pvr = get_pvr();
	if ((SVR_MJREV(svr) >= 2) &&
	    (PVR_MAJ(pvr) == 1) && (PVR_MIN(pvr) == 4)) {

		out_be32((void *)MPC5XXX_SDRAM_SDELAY, 0x04);
		__asm__ volatile ("sync");
	}

	return dramsize;
}

int checkboard (void)
{
	puts ("Board: A4M072\n");
	return 0;
}

#ifdef	CONFIG_PCI
static struct pci_controller hose;

extern void pci_mpc5xxx_init(struct pci_controller *);

void pci_init_board(void)
{
	pci_mpc5xxx_init(&hose);
}
#endif

#if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
int ft_board_setup(void *blob, bd_t *bd)
{
	ft_cpu_setup(blob, bd);

	return 0;
}
#endif

int board_eth_init(bd_t *bis)
{
	int rv, num_if = 0;

	/* Initialize TSECs first */
	if ((rv = cpu_eth_init(bis)) >= 0)
		num_if += rv;
	else
		printf("ERROR: failed to initialize FEC.\n");

	if ((rv = pci_eth_init(bis)) >= 0)
		num_if += rv;
	else
		printf("ERROR: failed to initialize PCI Ethernet.\n");

	return num_if;
}
/*
 * Miscellaneous late-boot configurations
 *
 * Initialize EEPROM write-protect GPIO pin.
 */
int misc_init_r(void)
{
#if defined(CONFIG_SYS_EEPROM_WREN)
	/* Enable GPIO pin */
	setbits_be32((void *)MPC5XXX_WU_GPIO_ENABLE, CONFIG_SYS_EEPROM_WP);
	/* Set direction, output */
	setbits_be32((void *)MPC5XXX_WU_GPIO_DIR, CONFIG_SYS_EEPROM_WP);
	/* De-assert write enable */
	setbits_be32((void *)MPC5XXX_WU_GPIO_DATA_O, CONFIG_SYS_EEPROM_WP);
#endif
	return 0;
}
#if defined(CONFIG_SYS_EEPROM_WREN)
/* Input: <dev_addr>  I2C address of EEPROM device to enable.
 *         <state>     -1: deliver current state
 *	               0: disable write
 *		       1: enable write
 *  Returns:           -1: wrong device address
 *                      0: dis-/en- able done
 *		     0/1: current state if <state> was -1.
 */
int eeprom_write_enable (unsigned dev_addr, int state)
{
	if (CONFIG_SYS_I2C_EEPROM_ADDR != dev_addr) {
		return -1;
	} else {
		switch (state) {
		case 1:
			/* Enable write access */
			clrbits_be32((void *)MPC5XXX_WU_GPIO_DATA_O, CONFIG_SYS_EEPROM_WP);
			state = 0;
			break;
		case 0:
			/* Disable write access */
			setbits_be32((void *)MPC5XXX_WU_GPIO_DATA_O, CONFIG_SYS_EEPROM_WP);
			state = 0;
			break;
		default:
			/* Read current status back. */
			state = (0 == (in_be32((void *)MPC5XXX_WU_GPIO_DATA_O) &
						   CONFIG_SYS_EEPROM_WP));
			break;
		}
	}
	return state;
}
#endif

#ifdef CONFIG_CMD_DISPLAY
#define DISPLAY_BUF_SIZE	2
static u8 display_buf[DISPLAY_BUF_SIZE];
static u8 display_putc_pos;
static u8 display_out_pos;

void display_set(int cmd) {

	if (cmd & DISPLAY_CLEAR) {
		display_buf[0] = display_buf[1] = 0;
	}

	if (cmd & DISPLAY_HOME) {
		display_putc_pos = 0;
	}
}

#define SEG_A    (1<<0)
#define SEG_B    (1<<1)
#define SEG_C    (1<<2)
#define SEG_D    (1<<3)
#define SEG_E    (1<<4)
#define SEG_F    (1<<5)
#define SEG_G    (1<<6)
#define SEG_P    (1<<7)
#define SEG__    0

/*
 * +- A -+
 * |     |
 * F     B
 * |     |
 * +- G -+
 * |     |
 * E     C
 * |     |
 * +- D -+  P
 *
 * 0..9		index 0..9
 * A..Z		index 10..35
 * -		index 36
 * _		index 37
 * .		index 38
 */

#define SYMBOL_DASH		(36)
#define SYMBOL_UNDERLINE	(37)
#define SYMBOL_DOT		(38)

static u8 display_char2seg7_tbl[]=
{
	SEG_A | SEG_B | SEG_C | SEG_D | SEG_E | SEG_F,		/* 0 */
	SEG_B | SEG_C,						/* 1 */
	SEG_A | SEG_B | SEG_D | SEG_E | SEG_G,			/* 2 */
	SEG_A | SEG_B | SEG_C | SEG_D | SEG_G,			/* 3 */
	SEG_B | SEG_C | SEG_F | SEG_G,				/* 4 */
	SEG_A | SEG_C | SEG_D | SEG_F | SEG_G,			/* 5 */
	SEG_A | SEG_C | SEG_D | SEG_E | SEG_F | SEG_G,		/* 6 */
	SEG_A | SEG_B | SEG_C,					/* 7 */
	SEG_A | SEG_B | SEG_C | SEG_D | SEG_E | SEG_F | SEG_G,	/* 8 */
	SEG_A | SEG_B | SEG_C | SEG_D | SEG_F | SEG_G,		/* 9 */
	SEG_A | SEG_B | SEG_C | SEG_E | SEG_F | SEG_G,		/* A */
	SEG_C | SEG_D | SEG_E | SEG_F | SEG_G,			/* b */
	SEG_A | SEG_D | SEG_E | SEG_F,				/* C */
	SEG_B | SEG_C | SEG_D | SEG_E | SEG_G,			/* d */
	SEG_A | SEG_D | SEG_E | SEG_F | SEG_G,			/* E */
	SEG_A | SEG_E | SEG_F | SEG_G,				/* F */
	0,					/* g - not displayed */
	SEG_B | SEG_C | SEG_E | SEG_F | SEG_G,			/* H */
	SEG_B | SEG_C,						/* I */
	0,					/* J - not displayed */
	0,					/* K - not displayed */
	SEG_D | SEG_E | SEG_F,					/* L */
	0,					/* m - not displayed */
	0,					/* n - not displayed */
	SEG_A | SEG_B | SEG_C | SEG_D | SEG_E | SEG_F,		/* O */
	SEG_A | SEG_B | SEG_E | SEG_F | SEG_G,			/* P */
	0,					/* q - not displayed */
	0,					/* r - not displayed */
	SEG_A | SEG_C | SEG_D | SEG_F | SEG_G,			/* S */
	SEG_D | SEG_E | SEG_F | SEG_G,				/* t */
	SEG_B | SEG_C | SEG_D | SEG_E | SEG_F,			/* U */
	0,					/* V - not displayed */
	0,					/* w - not displayed */
	0,					/* X - not displayed */
	SEG_B | SEG_C | SEG_D | SEG_F | SEG_G,			/* Y */
	0,					/* Z - not displayed */
	SEG_G,							/* - */
	SEG_D,							/* _ */
	SEG_P							/* . */
};

/* Convert char to the LED segments representation */
static u8 display_char2seg7(char c)
{
	u8 val = 0;

	if (c >= '0' && c <= '9')
		c -= '0';
	else if (c >= 'a' && c <= 'z')
		c -= 'a' - 10;
	else if (c >= 'A' && c <= 'Z')
		c -= 'A' - 10;
	else if (c == '-')
		c = SYMBOL_DASH;
	else if (c == '_')
		c = SYMBOL_UNDERLINE;
	else if (c == '.')
		c = SYMBOL_DOT;
	else
		c = ' ';	/* display unsupported symbols as space */

	if (c != ' ')
		val = display_char2seg7_tbl[(int)c];

	return val;
}

int display_putc(char c)
{
	if (display_putc_pos >= DISPLAY_BUF_SIZE)
		return -1;

	display_buf[display_putc_pos++] = display_char2seg7(c);
	/* one-symbol message should be steady */
	if (display_putc_pos == 1)
		display_buf[display_putc_pos] = display_char2seg7(c);

	return c;
}

/*
 * Flush current symbol to the LED display hardware
 */
static inline void display_flush(void)
{
	u32 val = display_buf[display_out_pos];

	val |= (val << 8) | (val << 16) | (val << 24);
	out_be32((void *)CONFIG_SYS_DISP_CHR_RAM, val);
}

/*
 * Output contents of the software display buffer to the LED display every 0.5s
 */
void board_show_activity(ulong timestamp)
{
	static ulong last;
	static u8 once;

	if (!once || (timestamp - last >= (CONFIG_SYS_HZ / 2))) {
		display_flush();
		display_out_pos ^= 1;
		last = timestamp;
		once = 1;
	}
}

/*
 * Empty fake function
 */
void show_activity(int arg)
{
}
#endif
#if defined (CONFIG_SHOW_BOOT_PROGRESS)
static int a4m072_status2code(int status, char *buf)
{
	char c = 0;

	if (((status > 0) && (status <= 8)) ||
				((status >= 100) && (status <= 108)) ||
				((status < 0) && (status >= -9)) ||
				(status == -100) || (status == -101) ||
				((status <= -103) && (status >= -113))) {
		c = '5';
	} else if (((status >= 9) && (status <= 14)) ||
			((status >= 120) && (status <= 123)) ||
			((status >= 125) && (status <= 129)) ||
			((status >= -13) && (status <= -10)) ||
			(status == -120) || (status == -122) ||
			((status <= -124) && (status >= -127)) ||
			(status == -129)) {
		c = '8';
	} else if (status == 15) {
		c = '9';
	} else if ((status <= -30) && (status >= -32)) {
		c = 'A';
	} else if (((status <= -35) && (status >= -40)) ||
			((status <= -42) && (status >= -51)) ||
			((status <= -53) && (status >= -58)) ||
			(status == -64) ||
			((status <= -80) && (status >= -83)) ||
			(status == -130) || (status == -140) ||
			(status == -150)) {
		c = 'B';
	}

	if (c == 0)
		return -EINVAL;

	buf[0] = (status < 0) ? '-' : c;
	buf[1] = c;

	return 0;
}

void show_boot_progress(int status)
{
	char buf[2];

	if (a4m072_status2code(status, buf) < 0)
		return;

	display_putc(buf[0]);
	display_putc(buf[1]);
	display_set(DISPLAY_HOME);
	display_out_pos = 0;	/* reset output position */

	/* we want to flush status 15 now */
	if (status == BOOTSTAGE_ID_RUN_OS)
		display_flush();
}
#endif
OpenPOWER on IntegriCloud