/* * (C) Copyright 2001 * Erik Theisen, Wave 7 Optics, etheisen@mindspring.com. *  Based on code by: * 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 <ppc4xx.h>#include <asm/processor.h>#include <watchdog.h>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_word8(flash_info_t *info, ulong dest, ulong data);static int write_word32 (flash_info_t *info, ulong dest, ulong data);static void flash_get_offsets (ulong base, flash_info_t *info);/*----------------------------------------------------------------------- */unsigned long flash_init (void){    int i;    unsigned long size_b0, base_b0;    unsigned long size_b1, base_b1;    /* Init: no FLASHes known */    for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {	flash_info[i].flash_id = FLASH_UNKNOWN;    }    /* Get Size of Boot and Main Flashes */    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);	return 0;    }    size_b1 = flash_get_size((vu_long *)FLASH_BASE1_PRELIM, &flash_info[1]);    if (flash_info[1].flash_id == FLASH_UNKNOWN) {	printf ("## Unknown FLASH on Bank 1 - Size = 0x%08lx = %ld MB\n",	    size_b1, size_b1<<20);	return 0;    }    /* Calculate base addresses */    base_b0 = -size_b0;    base_b1 = -size_b1;    /* Setup offsets for Boot Flash */    flash_get_offsets (base_b0, &flash_info[0]);    /* Protect board level data */    (void)flash_protect(FLAG_PROTECT_SET,			base_b0,			flash_info[0].start[1] - 1,			&flash_info[0]);    /* Monitor protection ON by default */    (void)flash_protect(FLAG_PROTECT_SET,			base_b0 + size_b0 - monitor_flash_len,			base_b0 + size_b0 - 1,			&flash_info[0]);    /* Protect the FPGA image */    (void)flash_protect(FLAG_PROTECT_SET,			FLASH_BASE1_PRELIM,			FLASH_BASE1_PRELIM + CFG_FPGA_IMAGE_LEN - 1,			&flash_info[1]);    /* Protect the default boot image */    (void)flash_protect(FLAG_PROTECT_SET,			FLASH_BASE1_PRELIM + CFG_FPGA_IMAGE_LEN,			FLASH_BASE1_PRELIM + CFG_FPGA_IMAGE_LEN + 0x600000 - 1,			&flash_info[1]);    /* Setup offsets for Main Flash */    flash_get_offsets (FLASH_BASE1_PRELIM, &flash_info[1]);    return (size_b0 + size_b1);} /* end flash_init() *//*----------------------------------------------------------------------- */static void flash_get_offsets (ulong base, flash_info_t *info){    int i;    /* set up sector start address table - FOR BOOT ROM ONLY!!! */    if ((info->flash_id & FLASH_TYPEMASK)  == FLASH_AM040) {	for (i = 0; i < info->sector_count; i++)	    info->start[i] = base + (i * 0x00010000);    }} /* end flash_get_offsets() *//*----------------------------------------------------------------------- */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 ("1 x AMD ");    break;	case FLASH_MAN_STM:	printf ("1 x STM ");	break;	case FLASH_MAN_INTEL:   printf ("2 x Intel ");  break;	default:                printf ("Unknown Vendor ");    }    switch (info->flash_id & FLASH_TYPEMASK) {	case FLASH_AM040:	    if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_AMD)		printf ("AM29LV040 (4096 Kbit, uniform sector size)\n");	    else if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_STM)		printf ("M29W040B (4096 Kbit, uniform block size)\n");	    else		printf ("UNKNOWN 29x040x (4096 Kbit, uniform sector size)\n");	    break;	case FLASH_28F320J3A:	    printf ("28F320J3A (32 Mbit = 128K x 32)\n");	    break;	case FLASH_28F640J3A:	    printf ("28F640J3A (64 Mbit = 128K x 64)\n");	    break;	case FLASH_28F128J3A:	    printf ("28F128J3A (128 Mbit = 128K x 128)\n");	    break;	default:	    printf ("Unknown Chip Type\n");    }    if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_STM) {	printf ("  Size: %ld KB in %d Blocks\n",		info->size >> 10, info->sector_count);    } else {	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");} /* end flash_print_info() *//* * The following code cannot be run from FLASH! */static ulong flash_get_size (vu_long *addr, flash_info_t *info){    short i;    ulong base = (ulong)addr;    /* Setup default type */    info->flash_id = FLASH_UNKNOWN;    info->sector_count =0;    info->size = 0;    /* Test for Boot Flash */    if (base == FLASH_BASE0_PRELIM) {	unsigned char value;	volatile unsigned char * addr2 = (unsigned char *)addr;	/* Write auto select command: read Manufacturer ID */	*(addr2 + 0x555) = 0xaa;	*(addr2 + 0x2aa) = 0x55;	*(addr2 + 0x555) = 0x90;	/* Manufacture ID */	value = *addr2;	switch (value) {	    case (unsigned char)AMD_MANUFACT:		info->flash_id = FLASH_MAN_AMD;		break;	    case (unsigned char)STM_MANUFACT:		info->flash_id = FLASH_MAN_STM;		break;	    default:		*addr2 = 0xf0;              /* no or unknown flash  */		return 0;	}	/* Device ID */	value = *(addr2 + 1);	switch (value) {	    case (unsigned char)AMD_ID_LV040B:	    case (unsigned char)STM_ID_29W040B:		info->flash_id += FLASH_AM040;		info->sector_count = 8;		info->size = 0x00080000;		break;                       /* => 512Kb */	    default:		*addr2 = 0xf0;               /* => no or unknown flash */		return 0;	}    }    else { /* MAIN Flash */	unsigned long value;	volatile unsigned long * addr2 = (unsigned long *)addr;	/* Write auto select command: read Manufacturer ID */	*addr2 = 0x90909090;	/* Manufacture ID */	value = *addr2;	switch (value) {	    case (unsigned long)INTEL_MANUFACT:		info->flash_id = FLASH_MAN_INTEL;		break;	    default:		*addr2 = 0xff;              /* no or unknown flash  */		return 0;	}	/* Device ID - This shit is interleaved... */	value = *(addr2 + 1);	switch (value) {	    case (unsigned long)INTEL_ID_28F320J3A:		info->flash_id += FLASH_28F320J3A;		info->sector_count = 32;		info->size = 0x00400000 * 2;		break;                       /* => 2 X 4 MB */	    case (unsigned long)INTEL_ID_28F640J3A:		info->flash_id += FLASH_28F640J3A;		info->sector_count = 64;		info->size = 0x00800000 * 2;		break;                       /* => 2 X 8 MB */	    case (unsigned long)INTEL_ID_28F128J3A:		info->flash_id += FLASH_28F128J3A;		info->sector_count = 128;		info->size = 0x01000000 * 2;		break;                       /* => 2 X 16 MB */	    default:		*addr2 = 0xff;               /* => no or unknown flash */	}    }    /* Make sure we don't exceed CFG_MAX_FLASH_SECT */    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;    }    /* set up sector start address table */    switch (info->flash_id & FLASH_TYPEMASK) {	case FLASH_AM040:	    for (i = 0; i < info->sector_count; i++)		info->start[i] = base + (i * 0x00010000);	    break;	case FLASH_28F320J3A:	case FLASH_28F640J3A:	case FLASH_28F128J3A:	    for (i = 0; i < info->sector_count; i++)		info->start[i] = base + (i * 0x00020000 * 2); /* 2 Banks */	    break;    }    /* Test for Boot Flash */    if (base == FLASH_BASE0_PRELIM) {	volatile unsigned char *addr2;	/* check for protected sectors */	for (i = 0; i < info->sector_count; i++) {	    /* read sector protection at sector address, (AX .. A0) = 0x02 */	    /* D0 = 1 if protected */	    addr2 = (volatile unsigned char *)(info->start[i]);	    info->protect[i] = *(addr2 + 2) & 1;	}	/* Restore read mode */	*(unsigned char *)base = 0xF0;       /* Reset NORMAL Flash */    }    else { /* Main Flash */	volatile unsigned long *addr2;	/* check for protected sectors */	for (i = 0; i < info->sector_count; i++) {	    /* read sector protection at sector address, (AX .. A0) = 0x02 */	    /* D0 = 1 if protected */	    addr2 = (volatile unsigned long *)(info->start[i]);	    info->protect[i] = *(addr2 + 2) & 0x1;	}	/* Restore read mode */	*(unsigned long *)base = 0xFFFFFFFF; /* Reset  Flash */    }    return (info->size);} /* end flash_get_size() *//*----------------------------------------------------------------------- */static int wait_for_DQ7(ulong addr, uchar cmp_val, ulong tout){    int i;    volatile uchar *vaddr =  (uchar *)addr;    /* Loop X times */    for (i = 1; i <= (100 * tout); i++) {    /* Wait up to tout ms */	udelay(10);	/* Pause 10 us */	/* Check for completion */	if ((vaddr[0] & 0x80) == (cmp_val & 0x80)) {	    return 0;	}	/* KEEP THE LUSER HAPPY - Print a dot every 1.1 seconds */	if (!(i % 110000))	    putc('.');	/* Kick the dog if needed */	WATCHDOG_RESET();    }    return 1;} /* wait_for_DQ7() *//*----------------------------------------------------------------------- */static int flash_erase8(flash_info_t *info, int s_first, int s_last){    int tcode, rcode = 0;    volatile uchar *addr = (uchar *)(info->start[0]);    volatile uchar *sector_addr;    int flag, prot, sect;    /* Validate arguments */    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;    }    /* Check for KNOWN flash type */    if (info->flash_id == FLASH_UNKNOWN) {	printf ("Can't erase unknown flash type - aborted\n");	return 1;    }    /* Check for protected sectors */    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");    /* Start erase on unprotected sectors */    for (sect = s_first; sect <= s_last; sect++) {	if (info->protect[sect] == 0) {      /* not protected */	    sector_addr = (uchar *)(info->start[sect]);		if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_STM)		    printf("Erasing block %p\n", sector_addr);		else		    printf("Erasing sector %p\n", sector_addr);	    /* Disable interrupts which might cause Flash to timeout */	    flag = disable_interrupts();	    *(addr + 0x555) = (uchar)0xAA;	    *(addr + 0x2aa) = (uchar)0x55;	    *(addr + 0x555) = (uchar)0x80;	    *(addr + 0x555) = (uchar)0xAA;	    *(addr + 0x2aa) = (uchar)0x55;	    *sector_addr = (uchar)0x30;      /* 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)!!	     * Takes up to 6 seconds.	     */	    tcode  = wait_for_DQ7((ulong)sector_addr, 0x80, 6000);	    /* re-enable interrupts if necessary */	    if (flag)		enable_interrupts();	    /* Make sure we didn't timeout */	    if (tcode) {		printf ("Timeout\n");		rcode = 1;	    }	}    }    /* wait at least 80us - let's wait 1 ms */    udelay (1000);    /* reset to read mode */    addr = (uchar *)info->start[0];    *addr = (uchar)0xF0;                     /* reset bank */    printf (" done\n");    return rcode;} /* end flash_erase8() */static int flash_erase32(flash_info_t *info, int s_first, int s_last){    int flag, sect;    ulong start, now, last;