[people/ms/u-boot.git] / board / siemens / pcu_e / flash.c

/*
 * (C) Copyright 2001
 * Wolfgang Denk, DENX Software Engineering, wd@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
 */

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

#if defined(CONFIG_ENV_IS_IN_FLASH)
# ifndef  CFG_ENV_ADDR
#  define CFG_ENV_ADDR	(CFG_FLASH_BASE + CFG_ENV_OFFSET)
# endif
# ifndef  CFG_ENV_SIZE
#  define CFG_ENV_SIZE	CFG_ENV_SECT_SIZE
# endif
# ifndef  CFG_ENV_SECT_SIZE
#  define CFG_ENV_SECT_SIZE  CFG_ENV_SIZE
# endif
#endif

/*---------------------------------------------------------------------*/
#undef DEBUG_FLASH

#ifdef DEBUG_FLASH
#define DEBUGF(fmt,args...) printf(fmt ,##args)
#else
#define DEBUGF(fmt,args...)
#endif
/*---------------------------------------------------------------------*/


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

/*-----------------------------------------------------------------------
 * Functions
 */
static ulong flash_get_size (vu_long *addr, flash_info_t *info);
static int write_data (flash_info_t *info, ulong dest, ulong data);
static void flash_get_offsets (ulong base, flash_info_t *info);

/*-----------------------------------------------------------------------
 *
 * The PCU E uses an address map where flash banks are aligned top
 * down, so that the "first" flash bank ends at top of memory, and
 * the monitor entry point is at address (0xFFF00100). The second
 * flash bank is mapped immediately below bank 0.
 *
 * This is NOT in conformance to the "official" memory map!
 *
 */

#define PCU_MONITOR_BASE   ( (flash_info[0].start[0] + flash_info[0].size - 1) \
			   - (0xFFFFFFFF - CFG_MONITOR_BASE) )

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

unsigned long flash_init (void)
{
	volatile immap_t     *immap  = (immap_t *)CFG_IMMR;
	volatile memctl8xx_t *memctl = &immap->im_memctl;
	unsigned long base, size_b0, size_b1;
	int i;

	/* Init: no FLASHes known */
	for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
		flash_info[i].flash_id = FLASH_UNKNOWN;
	}

	/* Static FLASH Bank configuration here - FIXME XXX */

	/*
	 * Warning:
	 *
	 * Since the PCU E memory map assigns flash banks top down,
	 * we swap the numbering later if both banks are equipped,
	 * so they look like a contiguous area of memory.
	 */
	DEBUGF("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_PRELIM);

	size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);

	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
		printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
			size_b0, size_b0<<20);
	}

	DEBUGF("## Get flash bank 2 size @ 0x%08x\n",FLASH_BASE6_PRELIM);
	size_b1 = flash_get_size((vu_long *)FLASH_BASE6_PRELIM, &flash_info[1]);

	DEBUGF("## Prelim. Flash bank sizes: %08lx + 0x%08lx\n", size_b0, size_b1);

	if (size_b1 > size_b0) {
		printf ("## ERROR: "
			"Bank 1 (0x%08lx = %ld MB) > Bank 0 (0x%08lx = %ld MB)\n",
			size_b1, size_b1<<20,
			size_b0, size_b0<<20
		);
		flash_info[0].flash_id	= FLASH_UNKNOWN;
		flash_info[1].flash_id	= FLASH_UNKNOWN;
		flash_info[0].sector_count	= -1;
		flash_info[1].sector_count	= -1;
		flash_info[0].size		= 0;
		flash_info[1].size		= 0;
		return (0);
	}

	DEBUGF ("## Before remap: "
		"BR0: 0x%08x    OR0: 0x%08x    "
		"BR6: 0x%08x    OR6: 0x%08x\n",
		memctl->memc_br0, memctl->memc_or0,
		memctl->memc_br6, memctl->memc_or6);

	/* Remap FLASH according to real size */
	base = 0 - size_b0;
	memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size_b0 & 0xFFFF8000);
	memctl->memc_br0 = (base & BR_BA_MSK) | BR_PS_16 | BR_MS_GPCM | BR_V;

	DEBUGF("## BR0: 0x%08x    OR0: 0x%08x\n",
		memctl->memc_br0, memctl->memc_or0);

	/* Re-do sizing to get full correct info */
	size_b0 = flash_get_size((vu_long *)base, &flash_info[0]);
	base = 0 - size_b0;

	flash_info[0].size = size_b0;

	flash_get_offsets (base, &flash_info[0]);

	/* monitor protection ON by default */
	flash_protect(FLAG_PROTECT_SET,
		      PCU_MONITOR_BASE,
		      PCU_MONITOR_BASE+monitor_flash_len-1,
		      &flash_info[0]);

#ifdef	CONFIG_ENV_IS_IN_FLASH
	/* ENV protection ON by default */
	flash_protect(FLAG_PROTECT_SET,
		      CFG_ENV_ADDR,
		      CFG_ENV_ADDR+CFG_ENV_SECT_SIZE-1,
		      &flash_info[0]);
#endif

	if (size_b1) {
		flash_info_t tmp_info;

		memctl->memc_or6 = CFG_OR_TIMING_FLASH | (-size_b1 & 0xFFFF8000);
		memctl->memc_br6 = ((base - size_b1) & BR_BA_MSK) |
				    BR_PS_16 | BR_MS_GPCM | BR_V;

		DEBUGF("## New BR6: 0x%08x    OR6: 0x%08x\n",
			memctl->memc_br6, memctl->memc_or6);

		/* Re-do sizing to get full correct info */
		size_b1 = flash_get_size((vu_long *)(base - size_b1),
					  &flash_info[1]);
		base -= size_b1;

		flash_get_offsets (base, &flash_info[1]);

		flash_info[1].size = size_b1;

#ifdef	CONFIG_ENV_IS_IN_FLASH
		/* ENV protection ON by default */
		flash_protect(FLAG_PROTECT_SET,
			      CFG_ENV_ADDR,
			      CFG_ENV_ADDR+CFG_ENV_SECT_SIZE-1,
			      &flash_info[1]);
#endif
		/*
		 * Swap bank numbers so that addresses are in ascending order
		 */
		tmp_info = flash_info[0];
		flash_info[0] = flash_info[1];
		flash_info[1] = tmp_info;
	} else {
		memctl->memc_br1 = 0;		/* invalidate bank */

		flash_info[1].flash_id = FLASH_UNKNOWN;
		flash_info[1].sector_count = -1;
	}


	DEBUGF("## Final Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1);

	return (size_b0 + size_b1);
}

/*-----------------------------------------------------------------------
 */
static void flash_get_offsets (ulong base, flash_info_t *info)
{
	int i;
	short n;

	if (info->flash_id == FLASH_UNKNOWN) {
		return;
	}

	if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_AMD) {
		return;
	}

	switch (info->flash_id & FLASH_TYPEMASK) {
	case FLASH_AMDL322T:
	case FLASH_AMDL323T:
	case FLASH_AMDL324T:
		/* set sector offsets for top boot block type		*/

		base += info->size;
		i = info->sector_count;
		for (n=0; n<8; ++n) {		/*  8 x 8k boot sectors	*/
			base -= 8 << 10;
			--i;
			info->start[i] = base;
		}
		while (i > 0) {			/* 64k regular sectors	*/
			base -= 64 << 10;
			--i;
			info->start[i] = base;
		}
		return;
	case FLASH_AMDL322B:
	case FLASH_AMDL323B:
	case FLASH_AMDL324B:
		/* set sector offsets for bottom boot block type	*/
		for (i=0; i<8; ++i) {		/*  8 x 8k boot sectors	*/
			info->start[i] = base;
			base += 8 << 10;
		}
		while (base < info->size) {	/* 64k regular sectors	*/
			info->start[i] = base;
			base += 64 << 10;
			++i;
		}
		return;
	case FLASH_AMDL640:
		/* set sector offsets for dual boot block type		*/
		for (i=0; i<8; ++i) {		/*  8 x 8k boot sectors	*/
			info->start[i] = base;
			base += 8 << 10;
		}
		n = info->sector_count - 8;
		while (i < n) {			/* 64k regular sectors	*/
			info->start[i] = base;
			base += 64 << 10;
			++i;
		}
		while (i < info->sector_count) { /* 8 x 8k boot sectors	*/
			info->start[i] = base;
			base += 8 << 10;
			++i;
		}
		return;
	default:
		return;
	}
	/* NOTREACHED */
}

/*-----------------------------------------------------------------------
 */
void flash_print_info  (flash_info_t *info)
{
	int i;

	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;
	case FLASH_MAN_FUJ:	printf ("FUJITSU ");		break;
	default:		printf ("Unknown Vendor ");	break;
	}

	switch (info->flash_id & FLASH_TYPEMASK) {
	case FLASH_AMDL322B:	printf ("AM29DL322B (32 Mbit, bottom boot sect)\n");
				break;
	case FLASH_AMDL322T:	printf ("AM29DL322T (32 Mbit, top boot sector)\n");
				break;
	case FLASH_AMDL323B:	printf ("AM29DL323B (32 Mbit, bottom boot sect)\n");
				break;
	case FLASH_AMDL323T:	printf ("AM29DL323T (32 Mbit, top boot sector)\n");
				break;
	case FLASH_AMDL324B:	printf ("AM29DL324B (32 Mbit, bottom boot sect)\n");
				break;
	case FLASH_AMDL324T:	printf ("AM29DL324T (32 Mbit, top boot sector)\n");
				break;
	case FLASH_AMDL640:	printf ("AM29DL640D (64 Mbit, dual boot sector)\n");
				break;
	default:		printf ("Unknown Chip Type 0x%lX\n",
					info->flash_id);
				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;
}

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


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

/*
 * The following code cannot be run from FLASH!
 */

static ulong flash_get_size (vu_long *addr, flash_info_t *info)
{
	short i;
	ushort value;
	vu_short *saddr = (vu_short *)addr;

	/* Write auto select command: read Manufacturer ID */
	saddr[0x0555] = 0x00AA;
	saddr[0x02AA] = 0x0055;
	saddr[0x0555] = 0x0090;

	value = saddr[0];

	DEBUGF("Manuf. ID @ 0x%08lx: 0x%04x\n", (ulong)addr, value);

	switch (value) {
	case (AMD_MANUFACT & 0xFFFF):
		info->flash_id = FLASH_MAN_AMD;
		break;
	case (FUJ_MANUFACT & 0xFFFF):
		info->flash_id = FLASH_MAN_FUJ;
		break;
	default:
		DEBUGF("Unknown Manufacturer ID\n");
		info->flash_id = FLASH_UNKNOWN;
		info->sector_count = 0;
		info->size = 0;
		return (0);			/* no or unknown flash	*/
	}

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

	DEBUGF("Device ID @ 0x%08lx: 0x%04x\n", (ulong)(&addr[1]), value);

	switch (value) {

	case (AMD_ID_DL322T & 0xFFFF):
		info->flash_id += FLASH_AMDL322T;
		info->sector_count = 71;
		info->size = 0x00400000;
		break;				/* => 8 MB		*/

	case (AMD_ID_DL322B & 0xFFFF):
		info->flash_id += FLASH_AMDL322B;
		info->sector_count = 71;
		info->size = 0x00400000;
		break;				/* => 8 MB		*/

	case (AMD_ID_DL323T & 0xFFFF):
		info->flash_id += FLASH_AMDL323T;
		info->sector_count = 71;
		info->size = 0x00400000;
		break;				/* => 8 MB		*/

	case (AMD_ID_DL323B & 0xFFFF):
		info->flash_id += FLASH_AMDL323B;
		info->sector_count = 71;
		info->size = 0x00400000;
		break;				/* => 8 MB		*/

	case (AMD_ID_DL324T & 0xFFFF):
		info->flash_id += FLASH_AMDL324T;
		info->sector_count = 71;
		info->size = 0x00400000;
		break;				/* => 8 MB		*/

	case (AMD_ID_DL324B & 0xFFFF):
		info->flash_id += FLASH_AMDL324B;
		info->sector_count = 71;
		info->size = 0x00400000;
		break;				/* => 8 MB		*/
	case (AMD_ID_DL640  & 0xFFFF):
		info->flash_id += FLASH_AMDL640;
		info->sector_count = 142;
		info->size = 0x00800000;
		break;
	default:
		DEBUGF("Unknown Device ID\n");
		info->flash_id = FLASH_UNKNOWN;
		return (0);			/* => no or unknown flash */

	}

	flash_get_offsets ((ulong)addr, info);

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

	if (info->sector_count > CFG_MAX_FLASH_SECT) {
		printf ("** ERROR: sector count %d > max (%d) **\n",
			info->sector_count, CFG_MAX_FLASH_SECT);
		info->sector_count = CFG_MAX_FLASH_SECT;
	}

	saddr = (vu_short *)info->start[0];
	*saddr = 0x00F0;	/* restore read mode */

	return (info->size);
}


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

int	flash_erase (flash_info_t *info, int s_first, int s_last)
{
	vu_short *addr = (vu_short*)(info->start[0]);
	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;
	}

	if ((info->flash_id == FLASH_UNKNOWN) ||
	    (info->flash_id > FLASH_AMD_COMP)) {
		printf ("Can't erase unknown flash type %08lx - aborted\n",
			info->flash_id);
		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");
	}

	l_sect = -1;

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

	addr[0x0555] = 0x00AA;
	addr[0x02AA] = 0x0055;
	addr[0x0555] = 0x0080;
	addr[0x0555] = 0x00AA;
	addr[0x02AA] = 0x0055;

	/* Start erase on unprotected sectors */
	for (sect = s_first; sect<=s_last; sect++) {
		if (info->protect[sect] == 0) {	/* not protected */
			addr = (vu_short*)(info->start[sect]);
			addr[0] = 0x0030;
			l_sect = sect;
		}
	}

	/* 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;
	addr = (vu_short*)(info->start[l_sect]);
	while ((addr[0] & 0x0080) != 0x0080) {
		if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
			printf ("Timeout\n");
			return 1;
		}
		/* show that we're waiting */
		if ((now - last) > 1000) {	/* every second */
			putc ('.');
			last = now;
		}
	}

DONE:
	/* reset to read mode */
	addr = (vu_short *)info->start[0];
	addr[0] = 0x00F0;	/* reset bank */

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

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

#define FLASH_WIDTH	2	/* flash bus width in bytes */

int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
{
	ulong cp, wp, data;
	int i, l, rc;

	wp = (addr & ~(FLASH_WIDTH-1));	/* get lower FLASH_WIDTH 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<FLASH_WIDTH && cnt>0; ++i) {
			data = (data << 8) | *src++;
			--cnt;
			++cp;
		}
		for (; cnt==0 && i<FLASH_WIDTH; ++i, ++cp) {
			data = (data << 8) | (*(uchar *)cp);
		}

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

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

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

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

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

/*-----------------------------------------------------------------------
 * Write a word to Flash, returns:
 * 0 - OK
 * 1 - write timeout
 * 2 - Flash not erased
 */
static int write_data (flash_info_t *info, ulong dest, ulong data)
{
	vu_short *addr  = (vu_short*)(info->start[0]);
	vu_short *sdest = (vu_short *)dest;
	ushort sdata = (ushort)data;
	ushort sval;
	ulong start, passed;
	int flag, rc;

	/* Check if Flash is (sufficiently) erased */
	if ((*sdest & sdata) != sdata) {
		return (2);
	}
	/* Disable interrupts which might cause a timeout here */
	flag = disable_interrupts();

	addr[0x0555] = 0x00AA;
	addr[0x02AA] = 0x0055;
	addr[0x0555] = 0x00A0;

#ifdef WORKAROUND_FOR_BROKEN_HARDWARE
	/* work around the timeout bugs */
	udelay(20);
#endif

	*sdest = sdata;

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

	rc = 0;
	/* data polling for D7 */
	start = get_timer (0);

	for (passed=0; passed < CFG_FLASH_WRITE_TOUT; passed=get_timer(start)) {

		sval = *sdest;

		if ((sval & 0x0080) == (sdata & 0x0080))
			break;

		if ((sval & 0x0020) == 0)	/* DQ5: Timeout? */
			continue;

		sval = *sdest;

		if ((sval & 0x0080) != (sdata & 0x0080))
			rc = 1;

		break;
	}

	if (rc) {
	    DEBUGF ("Program cycle failed @ addr 0x%08lX: val %04X data %04X\n",
		 dest, sval, sdata);
	}

	if (passed >= CFG_FLASH_WRITE_TOUT) {
		DEBUGF ("Timeout @ addr 0x%08lX: val %04X data %04X\n",
			dest, sval, sdata);
		rc = 1;
	}

	/* reset to read mode */
	addr = (vu_short *)info->start[0];
	addr[0] = 0x00F0;	/* reset bank */

	return (rc);
}

/*-----------------------------------------------------------------------
 */
Commit	Line	Data
affae2bf WD	1	/*
	2	* (C) Copyright 2001
	3	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	4	*
	5	* See file CREDITS for list of people who contributed to this
	6	* project.
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License as
	10	* published by the Free Software Foundation; either version 2 of
	11	* the License, or (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	21	* MA 02111-1307 USA
	22	*/
	23
	24	#include <common.h>
	25	#include <mpc8xx.h>
	26
5a1aceb0	27	#if defined(CONFIG_ENV_IS_IN_FLASH)
affae2bf WD	28	# ifndef CFG_ENV_ADDR
	29	# define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET)
	30	# endif
	31	# ifndef CFG_ENV_SIZE
	32	# define CFG_ENV_SIZE CFG_ENV_SECT_SIZE
	33	# endif
	34	# ifndef CFG_ENV_SECT_SIZE
	35	# define CFG_ENV_SECT_SIZE CFG_ENV_SIZE
	36	# endif
	37	#endif
	38
	39	/---------------------------------------------------------------------/
	40	#undef DEBUG_FLASH
	41
	42	#ifdef DEBUG_FLASH
	43	#define DEBUGF(fmt,args...) printf(fmt ,##args)
	44	#else
	45	#define DEBUGF(fmt,args...)
	46	#endif
	47	/---------------------------------------------------------------------/
	48
	49
	50	flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
	51
	52	/*-----------------------------------------------------------------------
	53	* Functions
	54	*/
	55	static ulong flash_get_size (vu_long addr, flash_info_t info);
	56	static int write_data (flash_info_t *info, ulong dest, ulong data);
	57	static void flash_get_offsets (ulong base, flash_info_t *info);
	58
	59	/*-----------------------------------------------------------------------
	60	*
	61	* The PCU E uses an address map where flash banks are aligned top
	62	* down, so that the "first" flash bank ends at top of memory, and
	63	* the monitor entry point is at address (0xFFF00100). The second
	64	* flash bank is mapped immediately below bank 0.
	65	*
	66	* This is NOT in conformance to the "official" memory map!
	67	*
	68	*/
	69
	70	#define PCU_MONITOR_BASE ( (flash_info[0].start[0] + flash_info[0].size - 1) \
	71	- (0xFFFFFFFF - CFG_MONITOR_BASE) )
	72
	73	/*-----------------------------------------------------------------------
	74	*/
	75
	76	unsigned long flash_init (void)
	77	{
	78	volatile immap_t immap = (immap_t )CFG_IMMR;
	79	volatile memctl8xx_t *memctl = &immap->im_memctl;
	80	unsigned long base, size_b0, size_b1;
	81	int i;
	82
	83	/* Init: no FLASHes known */
	84	for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
	85	flash_info[i].flash_id = FLASH_UNKNOWN;
	86	}
	87
	88	/* Static FLASH Bank configuration here - FIXME XXX */
	89
	90	/*
	91	* Warning:
92	*
93	* Since the PCU E memory map assigns flash banks top down,
94	* we swap the numbering later if both banks are equipped,
95	* so they look like a contiguous area of memory.
96	*/
97	DEBUGF("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_PRELIM);
98
99	size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
100
101	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
102	printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
103	size_b0, size_b0<<20);
104	}
105
106	DEBUGF("## Get flash bank 2 size @ 0x%08x\n",FLASH_BASE6_PRELIM);
107	size_b1 = flash_get_size((vu_long *)FLASH_BASE6_PRELIM, &flash_info[1]);
108
109	DEBUGF("## Prelim. Flash bank sizes: %08lx + 0x%08lx\n", size_b0, size_b1);
110
111	if (size_b1 > size_b0) {
112	printf ("## ERROR: "
113	"Bank 1 (0x%08lx = %ld MB) > Bank 0 (0x%08lx = %ld MB)\n",
114	size_b1, size_b1<<20,
115	size_b0, size_b0<<20
116	);
117	flash_info[0].flash_id = FLASH_UNKNOWN;
118	flash_info[1].flash_id = FLASH_UNKNOWN;
119	flash_info[0].sector_count = -1;
120	flash_info[1].sector_count = -1;
121	flash_info[0].size = 0;
122	flash_info[1].size = 0;
123	return (0);
124	}
125
126	DEBUGF ("## Before remap: "
127	"BR0: 0x%08x OR0: 0x%08x "
128	"BR6: 0x%08x OR6: 0x%08x\n",
129	memctl->memc_br0, memctl->memc_or0,
130	memctl->memc_br6, memctl->memc_or6);
131
132	/* Remap FLASH according to real size */
133	base = 0 - size_b0;
134	memctl->memc_or0 = CFG_OR_TIMING_FLASH \| (-size_b0 & 0xFFFF8000);
135	memctl->memc_br0 = (base & BR_BA_MSK) \| BR_PS_16 \| BR_MS_GPCM \| BR_V;
136
137	DEBUGF("## BR0: 0x%08x OR0: 0x%08x\n",
138	memctl->memc_br0, memctl->memc_or0);
139
140	/* Re-do sizing to get full correct info */
141	size_b0 = flash_get_size((vu_long *)base, &flash_info[0]);
142	base = 0 - size_b0;
143
144	flash_info[0].size = size_b0;
145
146	flash_get_offsets (base, &flash_info[0]);
147
148	/* monitor protection ON by default */
149	flash_protect(FLAG_PROTECT_SET,
150	PCU_MONITOR_BASE,
3b57fe0a	151	PCU_MONITOR_BASE+monitor_flash_len-1,
affae2bf WD	152	&flash_info[0]);
affae2bf WD	153
5a1aceb0	154	#ifdef CONFIG_ENV_IS_IN_FLASH
affae2bf WD	155	/* ENV protection ON by default */
	156	flash_protect(FLAG_PROTECT_SET,
	157	CFG_ENV_ADDR,
	158	CFG_ENV_ADDR+CFG_ENV_SECT_SIZE-1,
	159	&flash_info[0]);
	160	#endif
	161
	162	if (size_b1) {
	163	flash_info_t tmp_info;
	164
	165	memctl->memc_or6 = CFG_OR_TIMING_FLASH \| (-size_b1 & 0xFFFF8000);
	166	memctl->memc_br6 = ((base - size_b1) & BR_BA_MSK) \|
	167	BR_PS_16 \| BR_MS_GPCM \| BR_V;
	168
	169	DEBUGF("## New BR6: 0x%08x OR6: 0x%08x\n",
	170	memctl->memc_br6, memctl->memc_or6);
	171
	172	/* Re-do sizing to get full correct info */
	173	size_b1 = flash_get_size((vu_long *)(base - size_b1),
	174	&flash_info[1]);
	175	base -= size_b1;
	176
	177	flash_get_offsets (base, &flash_info[1]);
	178
	179	flash_info[1].size = size_b1;
	180
5a1aceb0	181	#ifdef CONFIG_ENV_IS_IN_FLASH
affae2bf WD	182	/* ENV protection ON by default */
	183	flash_protect(FLAG_PROTECT_SET,
	184	CFG_ENV_ADDR,
	185	CFG_ENV_ADDR+CFG_ENV_SECT_SIZE-1,
	186	&flash_info[1]);
	187	#endif
	188	/*
	189	* Swap bank numbers so that addresses are in ascending order
	190	*/
	191	tmp_info = flash_info[0];
	192	flash_info[0] = flash_info[1];
	193	flash_info[1] = tmp_info;
	194	} else {
	195	memctl->memc_br1 = 0; /* invalidate bank */
	196
	197	flash_info[1].flash_id = FLASH_UNKNOWN;
	198	flash_info[1].sector_count = -1;
	199	}
	200
	201
	202	DEBUGF("## Final Flash bank sizes: %08lx + 0x%08lx\n",size_b0,size_b1);
	203
	204	return (size_b0 + size_b1);
	205	}
	206
	207	/*-----------------------------------------------------------------------
	208	*/
	209	static void flash_get_offsets (ulong base, flash_info_t *info)
	210	{
	211	int i;
	212	short n;
	213
	214	if (info->flash_id == FLASH_UNKNOWN) {
	215	return;
	216	}
	217
	218	if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_AMD) {
	219	return;
	220	}
	221
	222	switch (info->flash_id & FLASH_TYPEMASK) {
	223	case FLASH_AMDL322T:
	224	case FLASH_AMDL323T:
	225	case FLASH_AMDL324T:
	226	/* set sector offsets for top boot block type */
	227
	228	base += info->size;
	229	i = info->sector_count;
	230	for (n=0; n<8; ++n) { /* 8 x 8k boot sectors */
	231	base -= 8 << 10;
	232	--i;
	233	info->start[i] = base;
	234	}
	235	while (i > 0) { /* 64k regular sectors */
	236	base -= 64 << 10;
	237	--i;
	238	info->start[i] = base;
	239	}
	240	return;
	241	case FLASH_AMDL322B:
	242	case FLASH_AMDL323B:
	243	case FLASH_AMDL324B:
	244	/* set sector offsets for bottom boot block type */
	245	for (i=0; i<8; ++i) { /* 8 x 8k boot sectors */
246	info->start[i] = base;
247	base += 8 << 10;
248	}
249	while (base < info->size) { /* 64k regular sectors */
250	info->start[i] = base;
251	base += 64 << 10;
252	++i;
253	}
254	return;
255	case FLASH_AMDL640:
256	/* set sector offsets for dual boot block type */
257	for (i=0; i<8; ++i) { /* 8 x 8k boot sectors */
258	info->start[i] = base;
259	base += 8 << 10;
260	}
261	n = info->sector_count - 8;
262	while (i < n) { /* 64k regular sectors */
263	info->start[i] = base;
264	base += 64 << 10;
265	++i;
266	}
267	while (i < info->sector_count) { /* 8 x 8k boot sectors */
268	info->start[i] = base;
269	base += 8 << 10;
270	++i;
271	}
272	return;
273	default:
274	return;
275	}
276	/* NOTREACHED */
277	}
278
279	/*-----------------------------------------------------------------------
280	*/
281	void flash_print_info (flash_info_t *info)
282	{
283	int i;
284
285	if (info->flash_id == FLASH_UNKNOWN) {
286	printf ("missing or unknown FLASH type\n");
287	return;
288	}
289
290	switch (info->flash_id & FLASH_VENDMASK) {
291	case FLASH_MAN_AMD: printf ("AMD "); break;
292	case FLASH_MAN_FUJ: printf ("FUJITSU "); break;
293	default: printf ("Unknown Vendor "); break;
294	}
295
296	switch (info->flash_id & FLASH_TYPEMASK) {
297	case FLASH_AMDL322B: printf ("AM29DL322B (32 Mbit, bottom boot sect)\n");
298	break;
299	case FLASH_AMDL322T: printf ("AM29DL322T (32 Mbit, top boot sector)\n");
300	break;
301	case FLASH_AMDL323B: printf ("AM29DL323B (32 Mbit, bottom boot sect)\n");
302	break;
303	case FLASH_AMDL323T: printf ("AM29DL323T (32 Mbit, top boot sector)\n");
304	break;
305	case FLASH_AMDL324B: printf ("AM29DL324B (32 Mbit, bottom boot sect)\n");
306	break;
307	case FLASH_AMDL324T: printf ("AM29DL324T (32 Mbit, top boot sector)\n");
308	break;
309	case FLASH_AMDL640: printf ("AM29DL640D (64 Mbit, dual boot sector)\n");
310	break;
311	default: printf ("Unknown Chip Type 0x%lX\n",
312	info->flash_id);
313	break;
314	}
315
316	printf (" Size: %ld MB in %d Sectors\n",
317	info->size >> 20, info->sector_count);
318
319	printf (" Sector Start Addresses:");
320	for (i=0; i<info->sector_count; ++i) {
321	if ((i % 5) == 0)
322	printf ("\n ");
323	printf (" %08lX%s",
324	info->start[i],
325	info->protect[i] ? " (RO)" : " "
326	);
327	}
328	printf ("\n");
329	return;
330	}
331
332	/*-----------------------------------------------------------------------
333	*/
334
335
336	/*-----------------------------------------------------------------------
337	*/
338
339	/*
340	* The following code cannot be run from FLASH!
341	*/
342
343	static ulong flash_get_size (vu_long addr, flash_info_t info)
344	{
345	short i;
346	ushort value;
347	vu_short saddr = (vu_short )addr;
348
349	/* Write auto select command: read Manufacturer ID */
350	saddr[0x0555] = 0x00AA;
351	saddr[0x02AA] = 0x0055;
352	saddr[0x0555] = 0x0090;
353
354	value = saddr[0];
355
356	DEBUGF("Manuf. ID @ 0x%08lx: 0x%04x\n", (ulong)addr, value);
357
358	switch (value) {
359	case (AMD_MANUFACT & 0xFFFF):
360	info->flash_id = FLASH_MAN_AMD;
361	break;
362	case (FUJ_MANUFACT & 0xFFFF):
363	info->flash_id = FLASH_MAN_FUJ;
364	break;
365	default:
366	DEBUGF("Unknown Manufacturer ID\n");
367	info->flash_id = FLASH_UNKNOWN;
368	info->sector_count = 0;
369	info->size = 0;
370	return (0); /* no or unknown flash */
371	}
372
373	value = saddr[1]; /* device ID */
374
375	DEBUGF("Device ID @ 0x%08lx: 0x%04x\n", (ulong)(&addr[1]), value);
376
377	switch (value) {
378
379	case (AMD_ID_DL322T & 0xFFFF):
380	info->flash_id += FLASH_AMDL322T;
381	info->sector_count = 71;
382	info->size = 0x00400000;
383	break; /* => 8 MB */
384
385	case (AMD_ID_DL322B & 0xFFFF):
386	info->flash_id += FLASH_AMDL322B;
387	info->sector_count = 71;
388	info->size = 0x00400000;
389	break; /* => 8 MB */
390
391	case (AMD_ID_DL323T & 0xFFFF):
392	info->flash_id += FLASH_AMDL323T;
393	info->sector_count = 71;
394	info->size = 0x00400000;
395	break; /* => 8 MB */
396
397	case (AMD_ID_DL323B & 0xFFFF):
398	info->flash_id += FLASH_AMDL323B;
399	info->sector_count = 71;
400	info->size = 0x00400000;
401	break; /* => 8 MB */
402
403	case (AMD_ID_DL324T & 0xFFFF):
404	info->flash_id += FLASH_AMDL324T;
405	info->sector_count = 71;
406	info->size = 0x00400000;
407	break; /* => 8 MB */
408
409	case (AMD_ID_DL324B & 0xFFFF):
410	info->flash_id += FLASH_AMDL324B;
411	info->sector_count = 71;
412	info->size = 0x00400000;
413	break; /* => 8 MB */
414	case (AMD_ID_DL640 & 0xFFFF):
415	info->flash_id += FLASH_AMDL640;
416	info->sector_count = 142;
417	info->size = 0x00800000;
418	break;
419	default:
420	DEBUGF("Unknown Device ID\n");
421	info->flash_id = FLASH_UNKNOWN;
422	return (0); /* => no or unknown flash */
423
424	}
425
426	flash_get_offsets ((ulong)addr, info);
427
428	/* check for protected sectors */
429	for (i = 0; i < info->sector_count; i++) {
430	#if 0
431	/* read sector protection at sector address, (A7 .. A0) = 0x02 */
432	/* D0 = 1 if protected */
433	saddr = (vu_short *)(info->start[i]);
434	info->protect[i] = saddr[2] & 1;
435	#else
436	info->protect[i] =0;
437	#endif
438	}
439
440	if (info->sector_count > CFG_MAX_FLASH_SECT) {
441	printf (" ERROR: sector count %d > max (%d) \n",
442	info->sector_count, CFG_MAX_FLASH_SECT);
443	info->sector_count = CFG_MAX_FLASH_SECT;
444	}
445
446	saddr = (vu_short *)info->start[0];
447	saddr = 0x00F0; / restore read mode */
448
449	return (info->size);
450	}
451
452
453	/*-----------------------------------------------------------------------
454	*/
455
456	int flash_erase (flash_info_t *info, int s_first, int s_last)
457	{
458	vu_short addr = (vu_short)(info->start[0]);
459	int flag, prot, sect, l_sect;
460	ulong start, now, last;
461
462	if ((s_first < 0) \|\| (s_first > s_last)) {
463	if (info->flash_id == FLASH_UNKNOWN) {
464	printf ("- missing\n");
465	} else {
466	printf ("- no sectors to erase\n");
467	}
468	return 1;
469	}
470
471	if ((info->flash_id == FLASH_UNKNOWN) \|\|
472	(info->flash_id > FLASH_AMD_COMP)) {
473	printf ("Can't erase unknown flash type %08lx - aborted\n",
474	info->flash_id);
475	return 1;
476	}
477
478	prot = 0;
479	for (sect=s_first; sect<=s_last; ++sect) {
480	if (info->protect[sect]) {
481	prot++;
482	}
483	}
484
485	if (prot) {
486	printf ("- Warning: %d protected sectors will not be erased!\n",
487	prot);
488	} else {
489	printf ("\n");
490	}
491
492	l_sect = -1;
493
494	/* Disable interrupts which might cause a timeout here */
495	flag = disable_interrupts();
496
497	addr[0x0555] = 0x00AA;
498	addr[0x02AA] = 0x0055;
499	addr[0x0555] = 0x0080;
500	addr[0x0555] = 0x00AA;
501	addr[0x02AA] = 0x0055;
502
503	/* Start erase on unprotected sectors */
504	for (sect = s_first; sect<=s_last; sect++) {
505	if (info->protect[sect] == 0) { /* not protected */
506	addr = (vu_short*)(info->start[sect]);
507	addr[0] = 0x0030;
508	l_sect = sect;
509	}
510	}
511
512	/* re-enable interrupts if necessary */
513	if (flag)
514	enable_interrupts();
515
516	/* wait at least 80us - let's wait 1 ms */
517	udelay (1000);
518
519	/*
520	* We wait for the last triggered sector
521	*/
522	if (l_sect < 0)
523	goto DONE;
524
525	start = get_timer (0);
526	last = start;
527	addr = (vu_short*)(info->start[l_sect]);
528	while ((addr[0] & 0x0080) != 0x0080) {
529	if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
530	printf ("Timeout\n");
531	return 1;
532	}
533	/* show that we're waiting */
534	if ((now - last) > 1000) { /* every second */
535	putc ('.');
536	last = now;
537	}
538	}
539
540	DONE:
541	/* reset to read mode */
542	addr = (vu_short *)info->start[0];
543	addr[0] = 0x00F0; /* reset bank */
544
545	printf (" done\n");
546	return 0;
547	}
548
549	/*-----------------------------------------------------------------------
550	* Copy memory to flash, returns:
551	* 0 - OK
552	* 1 - write timeout
553	* 2 - Flash not erased
554	*/
555
556	#define FLASH_WIDTH 2 /* flash bus width in bytes */
557
558	int write_buff (flash_info_t info, uchar src, ulong addr, ulong cnt)
559	{
560	ulong cp, wp, data;
561	int i, l, rc;
562
563	wp = (addr & ~(FLASH_WIDTH-1)); /* get lower FLASH_WIDTH aligned address */
564
565	/*
566	* handle unaligned start bytes
567	*/
568	if ((l = addr - wp) != 0) {
569	data = 0;
570	for (i=0, cp=wp; i<l; ++i, ++cp) {
571	data = (data << 8) \| ((uchar )cp);
572	}
573	for (; i<FLASH_WIDTH && cnt>0; ++i) {
574	data = (data << 8) \| *src++;
575	--cnt;
576	++cp;
577	}
578	for (; cnt==0 && i<FLASH_WIDTH; ++i, ++cp) {
579	data = (data << 8) \| ((uchar )cp);
580	}
581
582	if ((rc = write_data(info, wp, data)) != 0) {
583	return (rc);
584	}
585	wp += FLASH_WIDTH;
586	}
587
588	/*
589	* handle FLASH_WIDTH aligned part
590	*/
591	while (cnt >= FLASH_WIDTH) {
592	data = 0;
593	for (i=0; i<FLASH_WIDTH; ++i) {
594	data = (data << 8) \| *src++;
595	}
596	if ((rc = write_data(info, wp, data)) != 0) {
597	return (rc);
598	}
599	wp += FLASH_WIDTH;
600	cnt -= FLASH_WIDTH;
601	}
602
603	if (cnt == 0) {
604	return (0);
605	}
606
607	/*
608	* handle unaligned tail bytes
609	*/
610	data = 0;
611	for (i=0, cp=wp; i<FLASH_WIDTH && cnt>0; ++i, ++cp) {
612	data = (data << 8) \| *src++;
613	--cnt;
614	}
615	for (; i<FLASH_WIDTH; ++i, ++cp) {
616	data = (data << 8) \| ((uchar )cp);
617	}
618
619	return (write_data(info, wp, data));
620	}
621
622	/*-----------------------------------------------------------------------
623	* Write a word to Flash, returns:
624	* 0 - OK
625	* 1 - write timeout
626	* 2 - Flash not erased
627	*/
628	static int write_data (flash_info_t *info, ulong dest, ulong data)
629	{
630	vu_short addr = (vu_short)(info->start[0]);
631	vu_short sdest = (vu_short )dest;
632	ushort sdata = (ushort)data;
633	ushort sval;
634	ulong start, passed;
635	int flag, rc;
636
637	/* Check if Flash is (sufficiently) erased */
638	if ((*sdest & sdata) != sdata) {
639	return (2);
640	}
641	/* Disable interrupts which might cause a timeout here */
642	flag = disable_interrupts();
643
644	addr[0x0555] = 0x00AA;
645	addr[0x02AA] = 0x0055;
646	addr[0x0555] = 0x00A0;
647
648	#ifdef WORKAROUND_FOR_BROKEN_HARDWARE
649	/* work around the timeout bugs */
650	udelay(20);
651	#endif
652
653	*sdest = sdata;
654
655	/* re-enable interrupts if necessary */
656	if (flag)
657	enable_interrupts();
658
659	rc = 0;
660	/* data polling for D7 */
661	start = get_timer (0);
662
663	for (passed=0; passed < CFG_FLASH_WRITE_TOUT; passed=get_timer(start)) {
664
665	sval = *sdest;
666
667	if ((sval & 0x0080) == (sdata & 0x0080))
668	break;
669
670	if ((sval & 0x0020) == 0) /* DQ5: Timeout? */
671	continue;
672
673	sval = *sdest;
674
675	if ((sval & 0x0080) != (sdata & 0x0080))
676	rc = 1;
677
678	break;
679	}
680
681	if (rc) {
682	DEBUGF ("Program cycle failed @ addr 0x%08lX: val %04X data %04X\n",
683	dest, sval, sdata);
684	}
685
686	if (passed >= CFG_FLASH_WRITE_TOUT) {
687	DEBUGF ("Timeout @ addr 0x%08lX: val %04X data %04X\n",
688	dest, sval, sdata);
689	rc = 1;
690	}
691
692	/* reset to read mode */
693	addr = (vu_short *)info->start[0];
694	addr[0] = 0x00F0; /* reset bank */
695
696	return (rc);
697	}
698
699	/*-----------------------------------------------------------------------
700	*/