flash.c 9.93 KB
Newer Older
wdenk's avatar
wdenk committed
1 2 3 4 5 6 7 8 9 10 11
/*
 * (C) Copyright 2001, 2002
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * (C) Copyright 2002
 * Frank Panno <fpanno@delphintech.com>, Delphin Technology AG
 *
 * Flash Routines for AMD device AM29DL323DB on the EP8260 board.
 *
 * This file is based on board/tqm8260/flash.c.
 *--------------------------------------------------------------------
12
 * SPDX-License-Identifier:	GPL-2.0+
wdenk's avatar
wdenk committed
13 14 15 16 17 18 19 20 21
 */

#include <common.h>
#include <mpc8xx.h>

#define V_ULONG(a)	(*(volatile unsigned long *)( a ))
#define V_BYTE(a)	(*(volatile unsigned char *)( a ))


22
flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
wdenk's avatar
wdenk committed
23 24 25 26 27 28


/*-----------------------------------------------------------------------
 */
void flash_reset(void)
{
29 30 31 32
	if( flash_info[0].flash_id != FLASH_UNKNOWN ) {
		V_ULONG( flash_info[0].start[0] ) = 0x00F000F0;
		V_ULONG( flash_info[0].start[0] + 4 ) = 0x00F000F0;
	}
wdenk's avatar
wdenk committed
33 34 35 36 37 38
}

/*-----------------------------------------------------------------------
 */
ulong flash_get_size( ulong baseaddr, flash_info_t *info )
{
39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58
	short i;
	unsigned long flashtest_h, flashtest_l;

	/* Write auto select command sequence and test FLASH answer */
	V_ULONG(baseaddr + ((ulong)0x0555 << 3)) = 0x00AA00AA;
	V_ULONG(baseaddr + ((ulong)0x02AA << 3)) = 0x00550055;
	V_ULONG(baseaddr + ((ulong)0x0555 << 3)) = 0x00900090;
	V_ULONG(baseaddr + 4 + ((ulong)0x0555 << 3)) = 0x00AA00AA;
	V_ULONG(baseaddr + 4 + ((ulong)0x02AA << 3)) = 0x00550055;
	V_ULONG(baseaddr + 4 + ((ulong)0x0555 << 3)) = 0x00900090;

	flashtest_h = V_ULONG(baseaddr);		/* manufacturer ID	   */
	flashtest_l = V_ULONG(baseaddr + 4);

	if ((int)flashtest_h == AMD_MANUFACT) {
		info->flash_id = FLASH_MAN_AMD;
	} else {
		info->flash_id = FLASH_UNKNOWN;
		info->sector_count = 0;
		info->size = 0;
Wolfgang Denk's avatar
Wolfgang Denk committed
59
		return (0);				/* no or unknown flash	   */
60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77
	}

	flashtest_h = V_ULONG(baseaddr + 8);	        /* device ID		   */
	flashtest_l = V_ULONG(baseaddr + 12);
	if (flashtest_h != flashtest_l) {
		info->flash_id = FLASH_UNKNOWN;
		return(0);
	}

	switch((int)flashtest_h) {
	case AMD_ID_DL323B:
		info->flash_id += FLASH_AMDL323B;
		info->sector_count = 71;
		info->size = 0x01000000;	 /* 4 * 4 MB = 16 MB	*/
		break;
	case AMD_ID_LV640U:	/* AMDLV640 and AMDLV641 have same ID */
		info->flash_id += FLASH_AMLV640U;
		info->sector_count = 128;
Wolfgang Denk's avatar
Wolfgang Denk committed
78
		info->size = 0x02000000;	/* 4 * 8 MB = 32 MB	*/
79 80 81
		break;
	default:
		info->flash_id = FLASH_UNKNOWN;
Wolfgang Denk's avatar
Wolfgang Denk committed
82
		return(0);				/* no or unknown flash	   */
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
	}

	if(flashtest_h == AMD_ID_LV640U) {
		/* set up sector start adress table (uniform sector type) */
		for (i = 0; i < info->sector_count; i++)
			info->start[i] = baseaddr + (i * 0x00040000);
	} else {
		/* set up sector start adress table (bottom sector type) */
		for (i = 0; i < 8; i++) {
			info->start[i] = baseaddr + (i * 0x00008000);
		}
		for (i = 8; i < info->sector_count; i++) {
			info->start[i] = baseaddr + (i * 0x00040000) - 0x001C0000;
		}
	}
	/* check for protected sectors */
	for (i = 0; i < info->sector_count; i++) {
		/* read sector protection at sector address, (A7 .. A0) = 0x02 */
		if ((V_ULONG( info->start[i] + 16 ) & 0x00010001) ||
		    (V_ULONG( info->start[i] + 20 ) & 0x00010001)) {
			info->protect[i] = 1;		/* D0 = 1 if protected */
		} else {
			info->protect[i] = 0;
		}
	}

	flash_reset();
	return(info->size);
wdenk's avatar
wdenk committed
111 112 113 114 115 116
}

/*-----------------------------------------------------------------------
 */
unsigned long flash_init (void)
{
117 118
	unsigned long size_b0 = 0;
	int i;
wdenk's avatar
wdenk committed
119

120
	/* Init: no FLASHes known */
121
	for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
122 123
		flash_info[i].flash_id = FLASH_UNKNOWN;
	}
wdenk's avatar
wdenk committed
124

125
	/* Static FLASH Bank configuration here (only one bank) */
wdenk's avatar
wdenk committed
126

127
	size_b0 = flash_get_size(CONFIG_SYS_FLASH0_BASE, &flash_info[0]);
128 129 130 131
	if (flash_info[0].flash_id == FLASH_UNKNOWN || size_b0 == 0) {
		printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
			size_b0, size_b0>>20);
	}
wdenk's avatar
wdenk committed
132

133 134 135
	/*
	 * protect monitor and environment sectors
	 */
wdenk's avatar
wdenk committed
136

137
#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH0_BASE
138
	flash_protect(FLAG_PROTECT_SET,
139 140
		      CONFIG_SYS_MONITOR_BASE,
		      CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
141
		      &flash_info[0]);
wdenk's avatar
wdenk committed
142 143
#endif

144 145 146
#if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR)
# ifndef  CONFIG_ENV_SIZE
#  define CONFIG_ENV_SIZE	CONFIG_ENV_SECT_SIZE
wdenk's avatar
wdenk committed
147
# endif
148
	flash_protect(FLAG_PROTECT_SET,
149 150
		      CONFIG_ENV_ADDR,
		      CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1,
151
		      &flash_info[0]);
wdenk's avatar
wdenk committed
152 153
#endif

154
	return (size_b0);
wdenk's avatar
wdenk committed
155 156 157 158 159 160
}

/*-----------------------------------------------------------------------
 */
void flash_print_info  (flash_info_t *info)
{
161
	int i;
wdenk's avatar
wdenk committed
162

163 164 165 166
	if (info->flash_id == FLASH_UNKNOWN) {
		printf ("missing or unknown FLASH type\n");
		return;
	}
wdenk's avatar
wdenk committed
167

168 169 170 171
	switch ((info->flash_id >> 16) & 0xff) {
	case FLASH_MAN_AMD:	    printf ("AMD ");		    break;
	default:		    printf ("Unknown Vendor ");	    break;
	}
wdenk's avatar
wdenk committed
172

173 174
	switch (info->flash_id & FLASH_TYPEMASK) {
	case FLASH_AMDL323B:	printf ("29DL323B (32 M, bottom sector)\n");
wdenk's avatar
wdenk committed
175
				break;
176
	case FLASH_AMLV640U:	printf ("29LV640U (64 M, uniform sector)\n");
wdenk's avatar
wdenk committed
177
				break;
178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195
	default:		printf ("Unknown Chip Type\n");
				break;
	}

	printf ("  Size: %ld MB in %d Sectors\n",
		info->size >> 20, info->sector_count);

	printf ("  Sector Start Addresses:");
	for (i=0; i<info->sector_count; ++i) {
		if ((i % 5) == 0)
			printf ("\n   ");
		printf (" %08lX%s",
			info->start[i],
			info->protect[i] ? " (RO)" : "     "
			);
	}
	printf ("\n");
	return;
wdenk's avatar
wdenk committed
196 197 198 199 200 201
}

/*-----------------------------------------------------------------------
 */
int flash_erase (flash_info_t *info, int s_first, int s_last)
{
202 203 204 205 206 207 208 209 210 211 212
	int flag, prot, sect, l_sect;
	ulong start, now, last;

	if ((s_first < 0) || (s_first > s_last)) {
		if (info->flash_id == FLASH_UNKNOWN) {
			printf ("- missing\n");
		} else {
			printf ("- no sectors to erase\n");
		}
		return 1;
	}
wdenk's avatar
wdenk committed
213

214 215 216 217
	prot = 0;
	for (sect = s_first; sect <= s_last; sect++) {
		if (info->protect[sect])
			prot++;
wdenk's avatar
wdenk committed
218
	}
219 220 221 222 223 224

	if (prot) {
		printf ("- Warning: %d protected sectors will not be erased!\n",
			prot);
	} else {
		printf ("\n");
wdenk's avatar
wdenk committed
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

	l_sect = -1;

	/* Disable interrupts which might cause a timeout here */
	flag = disable_interrupts();

	V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00AA00AA;
	V_ULONG( info->start[0] + (0x02AA << 3) ) = 0x00550055;
	V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00800080;
	V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00AA00AA;
	V_ULONG( info->start[0] + (0x02AA << 3) ) = 0x00550055;
	V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00AA00AA;
	V_ULONG( info->start[0] + 4 + (0x02AA << 3) ) = 0x00550055;
	V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00800080;
	V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00AA00AA;
	V_ULONG( info->start[0] + 4 + (0x02AA << 3) ) = 0x00550055;
	udelay (1000);

	/* Start erase on unprotected sectors */
	for (sect = s_first; sect<=s_last; sect++) {
		if (info->protect[sect] == 0) {	/* not protected */
			V_ULONG( info->start[sect] ) = 0x00300030;
			V_ULONG( info->start[sect] + 4 ) = 0x00300030;
			l_sect = sect;
		}
wdenk's avatar
wdenk committed
251
	}
252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270

	/* re-enable interrupts if necessary */
	if (flag)
		enable_interrupts();

	/* wait at least 80us - let's wait 1 ms */
	udelay (1000);

	/*
	 * We wait for the last triggered sector
	 */
	if (l_sect < 0)
		goto DONE;

	start = get_timer (0);
	last  = start;
	while ((V_ULONG( info->start[l_sect] ) & 0x00800080) != 0x00800080 ||
	       (V_ULONG( info->start[l_sect] + 4 ) & 0x00800080) != 0x00800080)
	{
271
		if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
272 273 274 275 276 277 278 279
			printf ("Timeout\n");
			return 1;
		}
		/* show that we're waiting */
		if ((now - last) > 1000) {	/* every second */
			serial_putc ('.');
			last = now;
		}
wdenk's avatar
wdenk committed
280 281
	}

282 283 284
 DONE:
	/* reset to read mode */
	flash_reset ();
wdenk's avatar
wdenk committed
285

286 287
	printf (" done\n");
	return 0;
wdenk's avatar
wdenk committed
288 289 290 291 292 293 294 295 296 297 298 299 300
}

static int write_dword (flash_info_t *, ulong, unsigned char *);

/*-----------------------------------------------------------------------
 * Copy memory to flash, returns:
 * 0 - OK
 * 1 - write timeout
 * 2 - Flash not erased
 */

int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
{
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
	ulong dp;
	static unsigned char bb[8];
	int i, l, rc, cc = cnt;

	dp = (addr & ~7);	/* get lower dword aligned address */

	/*
	 * handle unaligned start bytes
	 */
	if ((l = addr - dp) != 0) {
		for (i = 0; i < 8; i++)
			bb[i] = (i < l || (i-l) >= cc) ? V_BYTE(dp+i) : *src++;
		if ((rc = write_dword(info, dp, bb)) != 0)
		{
			return (rc);
		}
		dp += 8;
		cc -= 8 - l;
	}

	/*
	 * handle word aligned part
	 */
	while (cc >= 8) {
		if ((rc = write_dword(info, dp, src)) != 0) {
			return (rc);
		}
		dp  += 8;
		src += 8;
		cc -= 8;
wdenk's avatar
wdenk committed
331
	}
332 333 334

	if (cc <= 0) {
		return (0);
wdenk's avatar
wdenk committed
335 336
	}

337 338 339 340 341 342 343
	/*
	 * handle unaligned tail bytes
	 */
	for (i = 0; i < 8; i++) {
		bb[i] = (i < cc) ? *src++ : V_BYTE(dp+i);
	}
	return (write_dword(info, dp, bb));
wdenk's avatar
wdenk committed
344 345 346 347 348 349 350 351 352 353
}

/*-----------------------------------------------------------------------
 * Write a dword to Flash, returns:
 * 0 - OK
 * 1 - write timeout
 * 2 - Flash not erased
 */
static int write_dword (flash_info_t *info, ulong dest, unsigned char * pdata)
{
354 355 356 357 358 359 360 361 362 363 364 365 366 367
	ulong start;
	ulong cl = 0, ch =0;
	int flag, i;

	for (ch=0, i=0; i < 4; i++)
		ch = (ch << 8) + *pdata++;	/* high word	*/
	for (cl=0, i=0; i < 4; i++)
		cl = (cl << 8) + *pdata++;	/* low word	*/

	/* Check if Flash is (sufficiently) erased */
	if ((*((vu_long *)dest) & ch)	!= ch
	    ||(*((vu_long *)(dest + 4)) & cl)	!= cl)
	{
		return (2);
wdenk's avatar
wdenk committed
368
	}
369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389

	/* Disable interrupts which might cause a timeout here */
	flag = disable_interrupts();

	V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00AA00AA;
	V_ULONG( info->start[0] + (0x02AA << 3) ) = 0x00550055;
	V_ULONG( info->start[0] + (0x0555 << 3) ) = 0x00A000A0;
	V_ULONG( dest ) = ch;
	V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00AA00AA;
	V_ULONG( info->start[0] + 4 + (0x02AA << 3) ) = 0x00550055;
	V_ULONG( info->start[0] + 4 + (0x0555 << 3) ) = 0x00A000A0;
	V_ULONG( dest + 4 ) = cl;

	/* re-enable interrupts if necessary */
	if (flag)
		enable_interrupts();

	/* data polling for D7 */
	start = get_timer (0);
	while (((V_ULONG( dest ) & 0x00800080) != (ch & 0x00800080)) ||
	       ((V_ULONG( dest + 4 ) & 0x00800080) != (cl & 0x00800080))) {
390
		if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
391 392 393 394
			return (1);
		}
	}
	return (0);
wdenk's avatar
wdenk committed
395
}