[thirdparty/u-boot.git] / board / sandburst / common / flash.c

/*
 * (C) Copyright 2002-2005
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * (C) Copyright 2002 Jun Gu <jung@artesyncp.com>
 * Add support for Am29F016D and dynamic switch setting.
 *
 * SPDX-License-Identifier:	GPL-2.0+ 
 */
/*
 * Ported from Ebony flash support
 * Travis B. Sawyer
 * Sandburst Corporation
 */
#include <common.h>
#include <asm/ppc4xx.h>
#include <asm/processor.h>


#undef DEBUG
#ifdef DEBUG
#define DEBUGF(x...) printf(x)
#else
#define DEBUGF(x...)
#endif /* DEBUG */


flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips	*/

static unsigned long flash_addr_table[8][CONFIG_SYS_MAX_FLASH_BANKS] = {
	{0xfff80000}	/* Boot Flash */
};

/*-----------------------------------------------------------------------
 * Functions
 */
static ulong flash_get_size (vu_long *addr, flash_info_t *info);
static int write_word (flash_info_t *info, ulong dest, ulong data);


#define ADDR0		0x5555
#define ADDR1		0x2aaa
#define FLASH_WORD_SIZE unsigned char


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

unsigned long flash_init (void)
{
	unsigned long total_b = 0;
	unsigned long size_b[CONFIG_SYS_MAX_FLASH_BANKS];
	unsigned short index = 0;
	int i;


	DEBUGF("\n");
	DEBUGF("FLASH: Index: %d\n", index);

	/* Init: no FLASHes known */
	for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
		flash_info[i].flash_id = FLASH_UNKNOWN;
		flash_info[i].sector_count = -1;
		flash_info[i].size = 0;

		/* check whether the address is 0 */
		if (flash_addr_table[index][i] == 0) {
			continue;
		}

		/* call flash_get_size() to initialize sector address */
		size_b[i] = flash_get_size(
			(vu_long *)flash_addr_table[index][i], &flash_info[i]);
		flash_info[i].size = size_b[i];
		if (flash_info[i].flash_id == FLASH_UNKNOWN) {
			printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",
				i, size_b[i], size_b[i]<<20);
			flash_info[i].sector_count = -1;
			flash_info[i].size = 0;
		}

		total_b += flash_info[i].size;
	}

	return total_b;
}


/*-----------------------------------------------------------------------
 */
void flash_print_info  (flash_info_t *info)
{
	int i;
	int k;
	int size;
	int erased;
	volatile unsigned long *flash;

	if (info->flash_id == FLASH_UNKNOWN) {
		printf ("missing or unknown FLASH type\n");
		return;
	}

	switch (info->flash_id & FLASH_VENDMASK) {
	case FLASH_MAN_AMD:	printf ("AMD ");		break;
	default:		printf ("Unknown Vendor ");	break;
	}

	switch (info->flash_id & FLASH_TYPEMASK) {
	case FLASH_AM040:	printf ("AM29F040 (512 Kbit, uniform sector size)\n");
		break;
	default:		printf ("Unknown Chip Type\n");
		break;
	}

	printf ("  Size: %ld KB in %d Sectors\n",
		info->size >> 10, info->sector_count);

	printf ("  Sector Start Addresses:");
	for (i=0; i<info->sector_count; ++i) {
		/*
		 * Check if whole sector is erased
		 */
		if (i != (info->sector_count-1))
			size = info->start[i+1] - info->start[i];
		else
			size = info->start[0] + info->size - info->start[i];
		erased = 1;
		flash = (volatile unsigned long *)info->start[i];
		size = size >> 2;	 /* divide by 4 for longword access */
		for (k=0; k<size; k++)
		{
			if (*flash++ != 0xffffffff)
			{
				erased = 0;
				break;
			}
		}

		if ((i % 5) == 0)
			printf ("\n   ");
			printf (" %08lX%s%s",
				info->start[i],
				erased ? " E" : "  ",
				info->protect[i] ? "RO " : "   "
				);
			}
		printf ("\n");
		return;
	}

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


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

/*
 * The following code cannot be run from FLASH!
 */
static ulong flash_get_size (vu_long *addr, flash_info_t *info)
{
	short i;
	FLASH_WORD_SIZE value;
	ulong base = (ulong)addr;
	volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *)addr;

	DEBUGF("FLASH ADDR: %08x\n", (unsigned)addr );

	/* Write auto select command: read Manufacturer ID */
	udelay(10000);
	addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
	udelay(1000);
	addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
	udelay(1000);
	addr2[ADDR0] = (FLASH_WORD_SIZE)0x00900090;
	udelay(1000);

	value = addr2[0];

	DEBUGF("FLASH MANUFACT: %x\n", value);

	switch (value) {
	case (FLASH_WORD_SIZE)AMD_MANUFACT:
		info->flash_id = FLASH_MAN_AMD;
		break;
	default:
		info->flash_id = FLASH_UNKNOWN;
		info->sector_count = 0;
		info->size = 0;
		return (0);			/* no or unknown flash	*/
	}

	value = addr2[1];			/* device ID		*/

	DEBUGF("\nFLASH DEVICEID: %x\n", value);

	switch (value) {
	case (FLASH_WORD_SIZE)AMD_ID_LV040B:
		info->flash_id += FLASH_AM040;
		info->sector_count = 8;
		info->size = 0x00080000; /* => 512 kb */
		break;

	default:
		info->flash_id = FLASH_UNKNOWN;
		return (0);			/* => no or unknown flash */

	}

	/* set up sector start address table */
	if (info->flash_id  == FLASH_AM040) {
		for (i = 0; i < info->sector_count; i++)
			info->start[i] = base + (i * 0x00010000);
	} else {
		if (info->flash_id & FLASH_BTYPE) {
			/* set sector offsets for bottom boot block type	*/
			info->start[0] = base + 0x00000000;
			info->start[1] = base + 0x00004000;
			info->start[2] = base + 0x00006000;
			info->start[3] = base + 0x00008000;
			for (i = 4; i < info->sector_count; i++) {
				info->start[i] = base + (i * 0x00010000) - 0x00030000;
			}
		} else {
			/* set sector offsets for top boot block type		*/
			i = info->sector_count - 1;
			info->start[i--] = base + info->size - 0x00004000;
			info->start[i--] = base + info->size - 0x00006000;
			info->start[i--] = base + info->size - 0x00008000;
			for (; i >= 0; i--) {
				info->start[i] = base + i * 0x00010000;
			}
		}
	}

	/* check for protected sectors */
	for (i = 0; i < info->sector_count; i++) {
		/* read sector protection at sector address, (A7 .. A0) = 0x02 */
		/* D0 = 1 if protected */
		addr2 = (volatile FLASH_WORD_SIZE *)(info->start[i]);
		if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST)
			info->protect[i] = 0;
		else
			info->protect[i] = addr2[2] & 1;
	}

	/* reset to return to reading data */
	addr2[0] = (FLASH_WORD_SIZE) 0x00F000F0;	/* reset bank */

	/*
	 * Prevent writes to uninitialized FLASH.
	 */
	if (info->flash_id != FLASH_UNKNOWN) {
		addr2 = (FLASH_WORD_SIZE *)info->start[0];
		*addr2 = (FLASH_WORD_SIZE)0x00F000F0;	/* reset bank */
	}

	return (info->size);
}

int wait_for_DQ7(flash_info_t *info, int sect)
{
	ulong start, now, last;
	volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[sect]);

	start = get_timer (0);
	last  = start;
	while ((addr[0] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080) {
		if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
			printf ("Timeout\n");
			return -1;
		}
		/* show that we're waiting */
		if ((now - last) > 1000) {  /* every second */
			putc ('.');
			last = now;
		}
	}
	return 0;
}

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

int flash_erase (flash_info_t *info, int s_first, int s_last)
{
	volatile FLASH_WORD_SIZE *addr = (FLASH_WORD_SIZE *)(info->start[0]);
	volatile FLASH_WORD_SIZE *addr2;
	int flag, prot, sect;
	int i;

	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;
	}

	if (info->flash_id == FLASH_UNKNOWN) {
		printf ("Can't erase unknown flash type - aborted\n");
		return 1;
	}

	prot = 0;
	for (sect=s_first; sect<=s_last; ++sect) {
		if (info->protect[sect]) {
			prot++;
		}
	}

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

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

	/* Start erase on unprotected sectors */
	for (sect = s_first; sect<=s_last; sect++) {
		if (info->protect[sect] == 0) { /* not protected */
			addr2 = (FLASH_WORD_SIZE *)(info->start[sect]);
			DEBUGF("Erasing sector %p\n", addr2);

			if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
				addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
				addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
				addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080;
				addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
				addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
				addr2[0] = (FLASH_WORD_SIZE)0x00500050;	 /* block erase */
				for (i=0; i<50; i++)
					udelay(1000);  /* wait 1 ms */
			} else {
				addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
				addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
				addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080;
				addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
				addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
				addr2[0] = (FLASH_WORD_SIZE)0x00300030;	 /* sector erase */
			}
			/*
			 * Wait for each sector to complete, it's more
			 * reliable.  According to AMD Spec, you must
			 * issue all erase commands within a specified
			 * timeout.  This has been seen to fail, especially
			 * if printf()s are included (for debug)!!
			 */
			wait_for_DQ7(info, sect);
		}
	}

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

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

	/* reset to read mode */
	addr = (FLASH_WORD_SIZE *)info->start[0];
	addr[0] = (FLASH_WORD_SIZE)0x00F000F0;	/* reset bank */

	printf (" done\n");
	return 0;
}

/*-----------------------------------------------------------------------
 * 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)
{
	ulong cp, wp, data;
	int i, l, rc;

	wp = (addr & ~3);	/* get lower word aligned address */

	/*
	 * handle unaligned start bytes
	 */
	if ((l = addr - wp) != 0) {
		data = 0;
		for (i=0, cp=wp; i<l; ++i, ++cp) {
			data = (data << 8) | (*(uchar *)cp);
		}
		for (; i<4 && cnt>0; ++i) {
			data = (data << 8) | *src++;
			--cnt;
			++cp;
		}
		for (; cnt==0 && i<4; ++i, ++cp) {
			data = (data << 8) | (*(uchar *)cp);
		}

		if ((rc = write_word(info, wp, data)) != 0) {
			return (rc);
		}
		wp += 4;
	}

	/*
	 * handle word aligned part
	 */
	while (cnt >= 4) {
		data = 0;
		for (i=0; i<4; ++i) {
			data = (data << 8) | *src++;
		}
		if ((rc = write_word(info, wp, data)) != 0) {
			return (rc);
		}
		wp  += 4;
		cnt -= 4;
	}

	if (cnt == 0) {
		return (0);
	}

	/*
	 * handle unaligned tail bytes
	 */
	data = 0;
	for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
		data = (data << 8) | *src++;
		--cnt;
	}
	for (; i<4; ++i, ++cp) {
		data = (data << 8) | (*(uchar *)cp);
	}

	return (write_word(info, wp, data));
}

/*-----------------------------------------------------------------------
 * Write a word to Flash, returns:
 * 0 - OK
 * 1 - write timeout
 * 2 - Flash not erased
 */
static int write_word (flash_info_t * info, ulong dest, ulong data)
{
	volatile FLASH_WORD_SIZE *addr2 = (FLASH_WORD_SIZE *) (info->start[0]);
	volatile FLASH_WORD_SIZE *dest2 = (FLASH_WORD_SIZE *) dest;
	volatile FLASH_WORD_SIZE *data2 = (FLASH_WORD_SIZE *) & data;
	ulong start;
	int i;

	/* Check if Flash is (sufficiently) erased */
	if ((*((volatile FLASH_WORD_SIZE *) dest) &
	     (FLASH_WORD_SIZE) data) != (FLASH_WORD_SIZE) data) {
		return (2);
	}

	for (i = 0; i < 4 / sizeof (FLASH_WORD_SIZE); i++) {
		int flag;

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

		addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
		addr2[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
		addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00A000A0;

		dest2[i] = data2[i];

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

		/* data polling for D7 */
		start = get_timer (0);
		while ((dest2[i] & (FLASH_WORD_SIZE) 0x00800080) !=
		       (data2[i] & (FLASH_WORD_SIZE) 0x00800080)) {

			if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
				return (1);
			}
		}
	}

	return (0);
}
Commit	Line	Data
b79316f2 SR	1	/*
	2	* (C) Copyright 2002-2005
	3	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	4	*
	5	* (C) Copyright 2002 Jun Gu <jung@artesyncp.com>
	6	* Add support for Am29F016D and dynamic switch setting.
	7	*
1a459660	8	* SPDX-License-Identifier: GPL-2.0+
b79316f2 SR	9	*/
	10	/*
	11	* Ported from Ebony flash support
	12	* Travis B. Sawyer
	13	* Sandburst Corporation
	14	*/
	15	#include <common.h>
b36df561	16	#include <asm/ppc4xx.h>
b79316f2 SR	17	#include <asm/processor.h>
	18
	19
	20	#undef DEBUG
	21	#ifdef DEBUG
	22	#define DEBUGF(x...) printf(x)
	23	#else
	24	#define DEBUGF(x...)
	25	#endif /* DEBUG */
	26
	27
6d0f6bcf	28	flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
b79316f2	29
6d0f6bcf	30	static unsigned long flash_addr_table[8][CONFIG_SYS_MAX_FLASH_BANKS] = {
b79316f2 SR	31	{0xfff80000} /* Boot Flash */
	32	};
	33
	34	/*-----------------------------------------------------------------------
	35	* Functions
	36	*/
	37	static ulong flash_get_size (vu_long addr, flash_info_t info);
	38	static int write_word (flash_info_t *info, ulong dest, ulong data);
	39
	40
	41	#define ADDR0 0x5555
	42	#define ADDR1 0x2aaa
	43	#define FLASH_WORD_SIZE unsigned char
	44
	45
	46	/*-----------------------------------------------------------------------
	47	*/
	48
	49	unsigned long flash_init (void)
	50	{
	51	unsigned long total_b = 0;
6d0f6bcf	52	unsigned long size_b[CONFIG_SYS_MAX_FLASH_BANKS];
b79316f2 SR	53	unsigned short index = 0;
	54	int i;
	55
	56
	57	DEBUGF("\n");
	58	DEBUGF("FLASH: Index: %d\n", index);
	59
	60	/* Init: no FLASHes known */
6d0f6bcf	61	for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
b79316f2 SR	62	flash_info[i].flash_id = FLASH_UNKNOWN;
	63	flash_info[i].sector_count = -1;
	64	flash_info[i].size = 0;
	65
	66	/* check whether the address is 0 */
	67	if (flash_addr_table[index][i] == 0) {
	68	continue;
	69	}
	70
	71	/* call flash_get_size() to initialize sector address */
	72	size_b[i] = flash_get_size(
	73	(vu_long *)flash_addr_table[index][i], &flash_info[i]);
	74	flash_info[i].size = size_b[i];
	75	if (flash_info[i].flash_id == FLASH_UNKNOWN) {
	76	printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",
	77	i, size_b[i], size_b[i]<<20);
	78	flash_info[i].sector_count = -1;
	79	flash_info[i].size = 0;
	80	}
	81
	82	total_b += flash_info[i].size;
	83	}
	84
	85	return total_b;
	86	}
	87
	88
	89	/*-----------------------------------------------------------------------
	90	*/
	91	void flash_print_info (flash_info_t *info)
	92	{
	93	int i;
	94	int k;
	95	int size;
	96	int erased;
	97	volatile unsigned long *flash;
	98
	99	if (info->flash_id == FLASH_UNKNOWN) {
	100	printf ("missing or unknown FLASH type\n");
	101	return;
	102	}
	103
	104	switch (info->flash_id & FLASH_VENDMASK) {
	105	case FLASH_MAN_AMD: printf ("AMD "); break;
	106	default: printf ("Unknown Vendor "); break;
	107	}
	108
	109	switch (info->flash_id & FLASH_TYPEMASK) {
	110	case FLASH_AM040: printf ("AM29F040 (512 Kbit, uniform sector size)\n");
	111	break;
	112	default: printf ("Unknown Chip Type\n");
	113	break;
	114	}
	115
	116	printf (" Size: %ld KB in %d Sectors\n",
	117	info->size >> 10, info->sector_count);
	118
	119	printf (" Sector Start Addresses:");
	120	for (i=0; i<info->sector_count; ++i) {
	121	/*
	122	* Check if whole sector is erased
	123	*/
	124	if (i != (info->sector_count-1))
	125	size = info->start[i+1] - info->start[i];
126	else
127	size = info->start[0] + info->size - info->start[i];
128	erased = 1;
129	flash = (volatile unsigned long *)info->start[i];
130	size = size >> 2; /* divide by 4 for longword access */
131	for (k=0; k<size; k++)
132	{
133	if (*flash++ != 0xffffffff)
134	{
135	erased = 0;
136	break;
137	}
138	}
139
140	if ((i % 5) == 0)
141	printf ("\n ");
142	printf (" %08lX%s%s",
143	info->start[i],
144	erased ? " E" : " ",
145	info->protect[i] ? "RO " : " "
146	);
147	}
148	printf ("\n");
149	return;
150	}
151
152	/*-----------------------------------------------------------------------
153	*/
154
155
156	/*-----------------------------------------------------------------------
157	*/
158
159	/*
160	* The following code cannot be run from FLASH!
161	*/
162	static ulong flash_get_size (vu_long addr, flash_info_t info)
163	{
164	short i;
165	FLASH_WORD_SIZE value;
166	ulong base = (ulong)addr;
167	volatile FLASH_WORD_SIZE addr2 = (FLASH_WORD_SIZE )addr;
168
169	DEBUGF("FLASH ADDR: %08x\n", (unsigned)addr );
170
171	/* Write auto select command: read Manufacturer ID */
172	udelay(10000);
173	addr2[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
174	udelay(1000);
175	addr2[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
176	udelay(1000);
177	addr2[ADDR0] = (FLASH_WORD_SIZE)0x00900090;
178	udelay(1000);
179
180	value = addr2[0];
181
182	DEBUGF("FLASH MANUFACT: %x\n", value);
183
184	switch (value) {
185	case (FLASH_WORD_SIZE)AMD_MANUFACT:
186	info->flash_id = FLASH_MAN_AMD;
187	break;
188	default:
189	info->flash_id = FLASH_UNKNOWN;
190	info->sector_count = 0;
191	info->size = 0;
192	return (0); /* no or unknown flash */
193	}
194
195	value = addr2[1]; /* device ID */
196
197	DEBUGF("\nFLASH DEVICEID: %x\n", value);
198
199	switch (value) {
200	case (FLASH_WORD_SIZE)AMD_ID_LV040B:
201	info->flash_id += FLASH_AM040;
202	info->sector_count = 8;
203	info->size = 0x00080000; /* => 512 kb */
204	break;
205
206	default:
207	info->flash_id = FLASH_UNKNOWN;
208	return (0); /* => no or unknown flash */
209
210	}
211
212	/* set up sector start address table */
213	if (info->flash_id == FLASH_AM040) {
214	for (i = 0; i < info->sector_count; i++)
215	info->start[i] = base + (i * 0x00010000);
216	} else {
217	if (info->flash_id & FLASH_BTYPE) {
218	/* set sector offsets for bottom boot block type */
219	info->start[0] = base + 0x00000000;
220	info->start[1] = base + 0x00004000;
221	info->start[2] = base + 0x00006000;
222	info->start[3] = base + 0x00008000;
223	for (i = 4; i < info->sector_count; i++) {
224	info->start[i] = base + (i * 0x00010000) - 0x00030000;
225	}
226	} else {
227	/* set sector offsets for top boot block type */
228	i = info->sector_count - 1;
229	info->start[i--] = base + info->size - 0x00004000;
230	info->start[i--] = base + info->size - 0x00006000;
231	info->start[i--] = base + info->size - 0x00008000;
232	for (; i >= 0; i--) {
233	info->start[i] = base + i * 0x00010000;
234	}
235	}
236	}
237
238	/* check for protected sectors */
239	for (i = 0; i < info->sector_count; i++) {
240	/* read sector protection at sector address, (A7 .. A0) = 0x02 */
241	/* D0 = 1 if protected */
242	addr2 = (volatile FLASH_WORD_SIZE *)(info->start[i]);
243	if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST)
244	info->protect[i] = 0;
245	else
246	info->protect[i] = addr2[2] & 1;
247	}
248
249	/* reset to return to reading data */
250	addr2[0] = (FLASH_WORD_SIZE) 0x00F000F0; /* reset bank */
251
252	/*
253	* Prevent writes to uninitialized FLASH.
254	*/
255	if (info->flash_id != FLASH_UNKNOWN) {
256	addr2 = (FLASH_WORD_SIZE *)info->start[0];
257	addr2 = (FLASH_WORD_SIZE)0x00F000F0; / reset bank */
258	}
259
260	return (info->size);
261	}
262
263	int wait_for_DQ7(flash_info_t *info, int sect)
264	{
265	ulong start, now, last;
266	volatile FLASH_WORD_SIZE addr = (FLASH_WORD_SIZE )(info->start[sect]);
267
268	start = get_timer (0);
269	last = start;
270	while ((addr[0] & (FLASH_WORD_SIZE)0x00800080) != (FLASH_WORD_SIZE)0x00800080) {
6d0f6bcf	271	if ((now = get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
b79316f2 SR	272	printf ("Timeout\n");
	273	return -1;
	274	}
	275	/* show that we're waiting */
	276	if ((now - last) > 1000) { /* every second */
	277	putc ('.');
	278	last = now;
	279	}
	280	}
	281	return 0;
	282	}
	283
	284	/*-----------------------------------------------------------------------
	285	*/
	286
	287	int flash_erase (flash_info_t *info, int s_first, int s_last)
	288	{
	289	volatile FLASH_WORD_SIZE addr = (FLASH_WORD_SIZE )(info->start[0]);
	290	volatile FLASH_WORD_SIZE *addr2;
effa4e30	291	int flag, prot, sect;
b79316f2 SR	292	int i;
	293
	294	if ((s_first < 0) \|\| (s_first > s_last)) {
	295	if (info->flash_id == FLASH_UNKNOWN) {
	296	printf ("- missing\n");
	297	} else {
	298	printf ("- no sectors to erase\n");
	299	}
	300	return 1;
	301	}
	302
	303	if (info->flash_id == FLASH_UNKNOWN) {
	304	printf ("Can't erase unknown flash type - aborted\n");
	305	return 1;
	306	}
	307
	308	prot = 0;
	309	for (sect=s_first; sect<=s_last; ++sect) {
	310	if (info->protect[sect]) {
	311	prot++;
	312	}
	313	}
	314
	315	if (prot) {
	316	printf ("- Warning: %d protected sectors will not be erased!\n",
	317	prot);
	318	} else {
	319	printf ("\n");
	320	}
	321
b79316f2 SR	322	/* Disable interrupts which might cause a timeout here */
	323	flag = disable_interrupts();
	324
	325	/* Start erase on unprotected sectors */
	326	for (sect = s_first; sect<=s_last; sect++) {
	327	if (info->protect[sect] == 0) { /* not protected */
	328	addr2 = (FLASH_WORD_SIZE *)(info->start[sect]);
	329	DEBUGF("Erasing sector %p\n", addr2);
	330
	331	if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
	332	addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
	333	addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
	334	addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080;
	335	addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
	336	addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
	337	addr2[0] = (FLASH_WORD_SIZE)0x00500050; /* block erase */
	338	for (i=0; i<50; i++)
	339	udelay(1000); /* wait 1 ms */
	340	} else {
	341	addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
	342	addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
	343	addr[ADDR0] = (FLASH_WORD_SIZE)0x00800080;
	344	addr[ADDR0] = (FLASH_WORD_SIZE)0x00AA00AA;
	345	addr[ADDR1] = (FLASH_WORD_SIZE)0x00550055;
	346	addr2[0] = (FLASH_WORD_SIZE)0x00300030; /* sector erase */
	347	}
b79316f2 SR	348	/*
	349	* Wait for each sector to complete, it's more
	350	* reliable. According to AMD Spec, you must
	351	* issue all erase commands within a specified
	352	* timeout. This has been seen to fail, especially
	353	* if printf()s are included (for debug)!!
	354	*/
	355	wait_for_DQ7(info, sect);
	356	}
	357	}
	358
	359	/* re-enable interrupts if necessary */
	360	if (flag)
	361	enable_interrupts();
	362
	363	/* wait at least 80us - let's wait 1 ms */
	364	udelay (1000);
	365
	366	/* reset to read mode */
	367	addr = (FLASH_WORD_SIZE *)info->start[0];
	368	addr[0] = (FLASH_WORD_SIZE)0x00F000F0; /* reset bank */
	369
	370	printf (" done\n");
	371	return 0;
	372	}
	373
	374	/*-----------------------------------------------------------------------
	375	* Copy memory to flash, returns:
	376	* 0 - OK
	377	* 1 - write timeout
	378	* 2 - Flash not erased
	379	*/
	380
	381	int write_buff (flash_info_t info, uchar src, ulong addr, ulong cnt)
	382	{
	383	ulong cp, wp, data;
	384	int i, l, rc;
	385
	386	wp = (addr & ~3); /* get lower word aligned address */
	387
	388	/*
	389	* handle unaligned start bytes
	390	*/
	391	if ((l = addr - wp) != 0) {
	392	data = 0;
	393	for (i=0, cp=wp; i<l; ++i, ++cp) {
	394	data = (data << 8) \| ((uchar )cp);
	395	}
	396	for (; i<4 && cnt>0; ++i) {
	397	data = (data << 8) \| *src++;
	398	--cnt;
	399	++cp;
	400	}
	401	for (; cnt==0 && i<4; ++i, ++cp) {
	402	data = (data << 8) \| ((uchar )cp);
	403	}
	404
	405	if ((rc = write_word(info, wp, data)) != 0) {
	406	return (rc);
	407	}
	408	wp += 4;
	409	}
	410
	411	/*
412	* handle word aligned part
413	*/
414	while (cnt >= 4) {
415	data = 0;
416	for (i=0; i<4; ++i) {
417	data = (data << 8) \| *src++;
418	}
419	if ((rc = write_word(info, wp, data)) != 0) {
420	return (rc);
421	}
422	wp += 4;
423	cnt -= 4;
424	}
425
426	if (cnt == 0) {
427	return (0);
428	}
429
430	/*
431	* handle unaligned tail bytes
432	*/
433	data = 0;
434	for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
435	data = (data << 8) \| *src++;
436	--cnt;
437	}
438	for (; i<4; ++i, ++cp) {
439	data = (data << 8) \| ((uchar )cp);
440	}
441
442	return (write_word(info, wp, data));
443	}
444
445	/*-----------------------------------------------------------------------
446	* Write a word to Flash, returns:
447	* 0 - OK
448	* 1 - write timeout
449	* 2 - Flash not erased
450	*/
451	static int write_word (flash_info_t * info, ulong dest, ulong data)
452	{
453	volatile FLASH_WORD_SIZE addr2 = (FLASH_WORD_SIZE ) (info->start[0]);
454	volatile FLASH_WORD_SIZE dest2 = (FLASH_WORD_SIZE ) dest;
455	volatile FLASH_WORD_SIZE data2 = (FLASH_WORD_SIZE ) & data;
456	ulong start;
457	int i;
458
459	/* Check if Flash is (sufficiently) erased */
460	if ((((volatile FLASH_WORD_SIZE ) dest) &
461	(FLASH_WORD_SIZE) data) != (FLASH_WORD_SIZE) data) {
462	return (2);
463	}
464
465	for (i = 0; i < 4 / sizeof (FLASH_WORD_SIZE); i++) {
466	int flag;
467
468	/* Disable interrupts which might cause a timeout here */
469	flag = disable_interrupts ();
470
471	addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00AA00AA;
472	addr2[ADDR1] = (FLASH_WORD_SIZE) 0x00550055;
473	addr2[ADDR0] = (FLASH_WORD_SIZE) 0x00A000A0;
474
475	dest2[i] = data2[i];
476
477	/* re-enable interrupts if necessary */
478	if (flag)
479	enable_interrupts ();
480
481	/* data polling for D7 */
482	start = get_timer (0);
483	while ((dest2[i] & (FLASH_WORD_SIZE) 0x00800080) !=
484	(data2[i] & (FLASH_WORD_SIZE) 0x00800080)) {
485
6d0f6bcf	486	if (get_timer (start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
b79316f2 SR	487	return (1);
	488	}
	489	}
	490	}
	491
	492	return (0);
	493	}