summaryrefslogtreecommitdiff
path: root/lib_blackfin/board.c
blob: 2679b438fea50df23a1b6d67ea5942f692253fed (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
/*
 * U-boot - board.c First C file to be called contains init routines
 *
 * Copyright (c) 2005-2008 Analog Devices Inc.
 *
 * (C) Copyright 2000-2004
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * Licensed under the GPL-2 or later.
 */

#include <common.h>
#include <command.h>
#include <devices.h>
#include <environment.h>
#include <i2c.h>
#include <malloc.h>
#include <net.h>
#include <version.h>

#include <asm/cplb.h>
#include <asm/mach-common/bits/mpu.h>

#ifdef CONFIG_CMD_NAND
#include <nand.h>	/* cannot even include nand.h if it isnt configured */
#endif

#if defined(CONFIG_POST)
#include <post.h>
int post_flag;
#endif

DECLARE_GLOBAL_DATA_PTR;

const char version_string[] = U_BOOT_VERSION " (" __DATE__ " - " __TIME__ ")";

__attribute__((always_inline))
static inline void serial_early_puts(const char *s)
{
#ifdef CONFIG_DEBUG_EARLY_SERIAL
	serial_puts("Early: ");
	serial_puts(s);
#endif
}

/* Get the input voltage */
static u_long get_vco(void)
{
	u_long msel;
	u_long vco;

	msel = (*pPLL_CTL >> 9) & 0x3F;
	if (0 == msel)
		msel = 64;

	vco = CONFIG_CLKIN_HZ;
	vco >>= (1 & *pPLL_CTL);	/* DF bit */
	vco = msel * vco;
	return vco;
}

/* Get the Core clock */
u_long get_cclk(void)
{
	u_long csel, ssel;
	if (*pPLL_STAT & 0x1)
		return CONFIG_CLKIN_HZ;

	ssel = *pPLL_DIV;
	csel = ((ssel >> 4) & 0x03);
	ssel &= 0xf;
	if (ssel && ssel < (1 << csel))	/* SCLK > CCLK */
		return get_vco() / ssel;
	return get_vco() >> csel;
}

/* Get the System clock */
u_long get_sclk(void)
{
	u_long ssel;

	if (*pPLL_STAT & 0x1)
		return CONFIG_CLKIN_HZ;

	ssel = (*pPLL_DIV & 0xf);

	return get_vco() / ssel;
}

static void *mem_malloc_start, *mem_malloc_end, *mem_malloc_brk;

static void mem_malloc_init(void)
{
	mem_malloc_start = (void *)CONFIG_SYS_MALLOC_BASE;
	mem_malloc_end = (void *)(CONFIG_SYS_MALLOC_BASE + CONFIG_SYS_MALLOC_LEN);
	mem_malloc_brk = mem_malloc_start;
	memset(mem_malloc_start, 0, mem_malloc_end - mem_malloc_start);
}

void *sbrk(ptrdiff_t increment)
{
	void *old = mem_malloc_brk;
	void *new = old + increment;

	if (new < mem_malloc_start || new > mem_malloc_end)
		return NULL;

	mem_malloc_brk = new;

	return old;
}

static int display_banner(void)
{
	printf("\n\n%s\n\n", version_string);
	printf("CPU:   ADSP " MK_STR(CONFIG_BFIN_CPU) " (Detected Rev: 0.%d)\n", bfin_revid());
	return 0;
}

static int init_baudrate(void)
{
	char baudrate[15];
	int i = getenv_r("baudrate", baudrate, sizeof(baudrate));
	gd->bd->bi_baudrate = gd->baudrate = (i > 0)
	    ? simple_strtoul(baudrate, NULL, 10)
	    : CONFIG_BAUDRATE;
	return 0;
}

static void display_global_data(void)
{
#ifdef CONFIG_DEBUG_EARLY_SERIAL
	bd_t *bd;
	bd = gd->bd;
	printf(" gd: %x\n", gd);
	printf(" |-flags: %x\n", gd->flags);
	printf(" |-board_type: %x\n", gd->board_type);
	printf(" |-baudrate: %i\n", gd->baudrate);
	printf(" |-have_console: %x\n", gd->have_console);
	printf(" |-ram_size: %x\n", gd->ram_size);
	printf(" |-reloc_off: %x\n", gd->reloc_off);
	printf(" |-env_addr: %x\n", gd->env_addr);
	printf(" |-env_valid: %x\n", gd->env_valid);
	printf(" |-jt(%x): %x\n", gd->jt, *(gd->jt));
	printf(" \\-bd: %x\n", gd->bd);
	printf("   |-bi_baudrate: %x\n", bd->bi_baudrate);
	printf("   |-bi_ip_addr: %x\n", bd->bi_ip_addr);
	printf("   |-bi_enetaddr: %x %x %x %x %x %x\n",
	       bd->bi_enetaddr[0], bd->bi_enetaddr[1],
	       bd->bi_enetaddr[2], bd->bi_enetaddr[3],
	       bd->bi_enetaddr[4], bd->bi_enetaddr[5]);
	printf("   |-bi_boot_params: %x\n", bd->bi_boot_params);
	printf("   |-bi_memstart: %x\n", bd->bi_memstart);
	printf("   |-bi_memsize: %x\n", bd->bi_memsize);
	printf("   |-bi_flashstart: %x\n", bd->bi_flashstart);
	printf("   |-bi_flashsize: %x\n", bd->bi_flashsize);
	printf("   \\-bi_flashoffset: %x\n", bd->bi_flashoffset);
#endif
}

#define CPLB_PAGE_SIZE (4 * 1024 * 1024)
#define CPLB_PAGE_MASK (~(CPLB_PAGE_SIZE - 1))
void init_cplbtables(void)
{
	volatile uint32_t *ICPLB_ADDR, *ICPLB_DATA;
	volatile uint32_t *DCPLB_ADDR, *DCPLB_DATA;
	uint32_t extern_memory;
	size_t i;

	void icplb_add(uint32_t addr, uint32_t data)
	{
		*(ICPLB_ADDR + i) = addr;
		*(ICPLB_DATA + i) = data;
	}
	void dcplb_add(uint32_t addr, uint32_t data)
	{
		*(DCPLB_ADDR + i) = addr;
		*(DCPLB_DATA + i) = data;
	}

	/* populate a few common entries ... we'll let
	 * the memory map and cplb exception handler do
	 * the rest of the work.
	 */
	i = 0;
	ICPLB_ADDR = (uint32_t *)ICPLB_ADDR0;
	ICPLB_DATA = (uint32_t *)ICPLB_DATA0;
	DCPLB_ADDR = (uint32_t *)DCPLB_ADDR0;
	DCPLB_DATA = (uint32_t *)DCPLB_DATA0;

	icplb_add(0xFFA00000, L1_IMEMORY);
	dcplb_add(0xFF800000, L1_DMEMORY);
	++i;

	icplb_add(CONFIG_SYS_MONITOR_BASE & CPLB_PAGE_MASK, SDRAM_IKERNEL);
	dcplb_add(CONFIG_SYS_MONITOR_BASE & CPLB_PAGE_MASK, SDRAM_DKERNEL);
	++i;

	/* If the monitor crosses a 4 meg boundary, we'll need
	 * to lock two entries for it.
	 */
	if ((CONFIG_SYS_MONITOR_BASE & CPLB_PAGE_MASK) != ((CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN) & CPLB_PAGE_MASK)) {
		icplb_add((CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN) & CPLB_PAGE_MASK, SDRAM_IKERNEL);
		dcplb_add((CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN) & CPLB_PAGE_MASK, SDRAM_DKERNEL);
		++i;
	}

	icplb_add(0x20000000, SDRAM_INON_CHBL);
	dcplb_add(0x20000000, SDRAM_EBIU);
	++i;

	/* Add entries for the rest of external RAM up to the bootrom */
	extern_memory = 0;

#ifdef CONFIG_DEBUG_NULL_PTR
	icplb_add(extern_memory, (SDRAM_IKERNEL & ~PAGE_SIZE_MASK) | PAGE_SIZE_1KB);
	dcplb_add(extern_memory, (SDRAM_DKERNEL & ~PAGE_SIZE_MASK) | PAGE_SIZE_1KB);
	++i;
	icplb_add(extern_memory, SDRAM_IKERNEL);
	dcplb_add(extern_memory, SDRAM_DKERNEL);
	extern_memory += CPLB_PAGE_SIZE;
	++i;
#endif

	while (i < 16 && extern_memory < (CONFIG_SYS_MONITOR_BASE & CPLB_PAGE_MASK)) {
		icplb_add(extern_memory, SDRAM_IGENERIC);
		dcplb_add(extern_memory, SDRAM_DGENERIC);
		extern_memory += CPLB_PAGE_SIZE;
		++i;
	}
	while (i < 16) {
		icplb_add(0, 0);
		dcplb_add(0, 0);
		++i;
	}
}

/*
 * All attempts to come up with a "common" initialization sequence
 * that works for all boards and architectures failed: some of the
 * requirements are just _too_ different. To get rid of the resulting
 * mess of board dependend #ifdef'ed code we now make the whole
 * initialization sequence configurable to the user.
 *
 * The requirements for any new initalization function is simple: it
 * receives a pointer to the "global data" structure as it's only
 * argument, and returns an integer return code, where 0 means
 * "continue" and != 0 means "fatal error, hang the system".
 */

extern int exception_init(void);
extern int irq_init(void);
extern int timer_init(void);

void board_init_f(ulong bootflag)
{
	ulong addr;
	bd_t *bd;

#ifdef CONFIG_BOARD_EARLY_INIT_F
	serial_early_puts("Board early init flash\n");
	board_early_init_f();
#endif

	serial_early_puts("Init CPLB tables\n");
	init_cplbtables();

	serial_early_puts("Exceptions setup\n");
	exception_init();

#ifndef CONFIG_ICACHE_OFF
	serial_early_puts("Turn on ICACHE\n");
	icache_enable();
#endif
#ifndef CONFIG_DCACHE_OFF
	serial_early_puts("Turn on DCACHE\n");
	dcache_enable();
#endif

	serial_early_puts("Init global data\n");
	gd = (gd_t *) (CONFIG_SYS_GBL_DATA_ADDR);
	memset((void *)gd, 0, sizeof(gd_t));

	/* Board data initialization */
	addr = (CONFIG_SYS_GBL_DATA_ADDR + sizeof(gd_t));

	/* Align to 4 byte boundary */
	addr &= ~(4 - 1);
	bd = (bd_t *) addr;
	gd->bd = bd;
	memset((void *)bd, 0, sizeof(bd_t));

	bd->bi_r_version = version_string;
	bd->bi_cpu = MK_STR(CONFIG_BFIN_CPU);
	bd->bi_board_name = BFIN_BOARD_NAME;
	bd->bi_vco = get_vco();
	bd->bi_cclk = get_cclk();
	bd->bi_sclk = get_sclk();

	/* Initialize */
	serial_early_puts("IRQ init\n");
	irq_init();
	serial_early_puts("Environment init\n");
	env_init();
	serial_early_puts("Baudrate init\n");
	init_baudrate();
	serial_early_puts("Serial init\n");
	serial_init();
	serial_early_puts("Console init flash\n");
	console_init_f();
	serial_early_puts("End of early debugging\n");
	display_banner();

	checkboard();
	timer_init();

	printf("Clock: VCO: %lu MHz, Core: %lu MHz, System: %lu MHz\n",
	       get_vco() / 1000000, get_cclk() / 1000000, get_sclk() / 1000000);

	printf("RAM:   ");
	print_size(initdram(0), "\n");
#if defined(CONFIG_POST)
	post_init_f();
	post_bootmode_init();
	post_run(NULL, POST_ROM | post_bootmode_get(0));
#endif

	board_init_r((gd_t *) gd, 0x20000010);
}

#if defined(CONFIG_SOFT_I2C) || defined(CONFIG_HARD_I2C)
static int init_func_i2c(void)
{
	puts("I2C:   ");
	i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
	puts("ready\n");
	return (0);
}
#endif

void board_init_r(gd_t * id, ulong dest_addr)
{
	extern void malloc_bin_reloc(void);
	char *s;
	bd_t *bd;
	gd = id;
	gd->flags |= GD_FLG_RELOC;	/* tell others: relocation done */
	bd = gd->bd;

#if defined(CONFIG_POST)
	post_output_backlog();
	post_reloc();
#endif

#if	!defined(CONFIG_SYS_NO_FLASH)
	/* There are some other pointer constants we must deal with */
	/* configure available FLASH banks */
	extern flash_info_t flash_info[];
	ulong size = flash_init();
	puts("Flash: ");
	print_size(size, "\n");
	flash_protect(FLAG_PROTECT_SET, CONFIG_SYS_FLASH_BASE,
		      CONFIG_SYS_FLASH_BASE + 0x1ffff, &flash_info[0]);
	bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
	bd->bi_flashsize = size;
	bd->bi_flashoffset = 0;
#else
	bd->bi_flashstart = 0;
	bd->bi_flashsize = 0;
	bd->bi_flashoffset = 0;
#endif
	/* initialize malloc() area */
	mem_malloc_init();
	malloc_bin_reloc();

#ifdef CONFIG_SPI
# if ! defined(CONFIG_ENV_IS_IN_EEPROM)
	spi_init_f();
# endif
	spi_init_r();
#endif

	/* relocate environment function pointers etc. */
	env_relocate();

#ifdef CONFIG_CMD_NET
	/* board MAC address */
	s = getenv("ethaddr");
	if (s == NULL) {
# ifndef CONFIG_ETHADDR
#  if 0
		if (!board_get_enetaddr(bd->bi_enetaddr)) {
			char nid[20];
			sprintf(nid, "%02X:%02X:%02X:%02X:%02X:%02X",
				bd->bi_enetaddr[0], bd->bi_enetaddr[1],
				bd->bi_enetaddr[2], bd->bi_enetaddr[3],
				bd->bi_enetaddr[4], bd->bi_enetaddr[5]);
			setenv("ethaddr", nid);
		}
#  endif
# endif
	} else {
		int i;
		char *e;
		for (i = 0; i < 6; ++i) {
			bd->bi_enetaddr[i] = simple_strtoul(s, &e, 16);
			s = (*e) ? e + 1 : e;
		}
	}

	/* IP Address */
	bd->bi_ip_addr = getenv_IPaddr("ipaddr");
#endif

	/* Initialize devices */
	devices_init();
	jumptable_init();

	/* Initialize the console (after the relocation and devices init) */
	console_init_r();

	/* Initialize from environment */
	if ((s = getenv("loadaddr")) != NULL)
		load_addr = simple_strtoul(s, NULL, 16);
#ifdef CONFIG_CMD_NET
	if ((s = getenv("bootfile")) != NULL)
		copy_filename(BootFile, s, sizeof(BootFile));
#endif

#ifdef CONFIG_CMD_NAND
	puts("NAND:  ");
	nand_init();		/* go init the NAND */
#endif

#if defined(CONFIG_MISC_INIT_R)
	/* miscellaneous platform dependent initialisations */
	misc_init_r();
#endif

#ifdef CONFIG_CMD_NET
	printf("Net:   ");
	eth_initialize(gd->bd);
	if (getenv("ethaddr"))
		printf("MAC:   %02X:%02X:%02X:%02X:%02X:%02X\n",
			bd->bi_enetaddr[0], bd->bi_enetaddr[1], bd->bi_enetaddr[2],
			bd->bi_enetaddr[3], bd->bi_enetaddr[4], bd->bi_enetaddr[5]);
#endif

#if defined(CONFIG_SOFT_I2C) || defined(CONFIG_HARD_I2C)
	init_func_i2c();
#endif

	display_global_data();

#if defined(CONFIG_POST)
	if (post_flag)
		post_run(NULL, POST_RAM | post_bootmode_get(0));
#endif

	/* main_loop() can return to retry autoboot, if so just run it again. */
	for (;;)
		main_loop();
}

void hang(void)
{
	puts("### ERROR ### Please RESET the board ###\n");
	while (1)
		/* If a JTAG emulator is hooked up, we'll automatically trigger
		 * a breakpoint in it.  If one isn't, this is just a NOP.
		 */
		asm("emuexcpt;");
}