/* * (C) Copyright 2002 * MAZeT GmbH <www.mazet.de> * Stephan Linz <linz@mazet.de>, <linz@li-pro.net> * * The most stuff comes from PPCBoot and Linux. * * IMMS gGmbH <www.imms.de> * Thomas Elste <info@elste.org> * * Modifications for ModNET50 Board * * 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 <asm/arch/netarm_registers.h>#define SCR   (*(volatile unsigned int *)(NETARM_GEN_MODULE_BASE + NETARM_GEN_SYSTEM_CONTROL))#define ALIGN_ABORT_OFF		SCR = SCR & ~NETARM_GEN_SYS_CFG_ALIGN_ABORT#define ALIGN_ABORT_ON		SCR = SCR |  NETARM_GEN_SYS_CFG_ALIGN_ABORT#define PROG_ADDR		(0x555*2)#define SETUP_ADDR		(0x555*2)#define ID_ADDR			(0x555*2)#define UNLOCK_ADDR1		(0x555*2)#define UNLOCK_ADDR2		(0x2AA*2)#define UNLOCK_CMD1		(0xAA)#define UNLOCK_CMD2		(0x55)#define ERASE_SUSPEND_CMD	(0xB0)#define ERASE_RESUME_CMD	(0x30)#define RESET_CMD		(0xF0)#define ID_CMD			(0x90)#define SECERASE_CMD		(0x30)#define CHIPERASE_CMD		(0x10)#define PROG_CMD		(0xa0)#define SETUP_CMD		(0x80)#define DQ2			(0x04)#define DQ3			(DQ2*2)#define DQ5			(DQ3*4)#define DQ6			(DQ5*2)#define WRITE_UNLOCK(addr) { \  *(volatile __u16*)(addr + UNLOCK_ADDR1) = (__u16)UNLOCK_CMD1; \  *(volatile __u16*)(addr + UNLOCK_ADDR2) = (__u16)UNLOCK_CMD2; \}#define CONFIG_AM29_RESERVED	(0)#define K			(1024)#define MB			(4)#define CELL_SIZE		(64*K)#define DEVICE_SIZE		(MB*K*K)#define CELLS_PER_DEVICE	(DEVICE_SIZE/CELL_SIZE)#define RESERVED_CELLS		(CONFIG_AM29_RESERVED*K)/CELL_SIZE#define MAX_FLASH_DEVICES	(1)#define AVAIL_SIZE		(DEVICE_SIZE*MAX_FLASH_DEVICES - RESERVED_CELLS*CELL_SIZE)flash_info_t flash_info[CFG_MAX_FLASH_BANKS];static __u16 toggling_bits;/*----------------------------------------------------------------------- */ulong flash_get_size (ulong baseaddr, flash_info_t * info){	short i;	__u16 flashtest;	/* Write auto select command sequence and test FLASH answer */	WRITE_UNLOCK (baseaddr);	*(volatile __u16 *) (baseaddr + ID_ADDR) = (__u16) ID_CMD;	flashtest /* manufacturer ID */  = *(volatile __u16 *) (baseaddr);	*(volatile __u16 *) (baseaddr + ID_ADDR) = (__u16) RESET_CMD;	switch ((__u32) ((flashtest << 16) + flashtest)) {	case AMD_MANUFACT:		info->flash_id = FLASH_MAN_AMD & FLASH_VENDMASK;		break;	case FUJ_MANUFACT:		info->flash_id = FLASH_MAN_FUJ & FLASH_VENDMASK;		break;	default:		info->flash_id = FLASH_UNKNOWN;		info->sector_count = 0;		info->size = 0;		return (0);	/* no or unknown flash */	}	/* Write auto select command sequence and test FLASH answer */	WRITE_UNLOCK (baseaddr);	*(volatile __u16 *) (baseaddr + ID_ADDR) = (__u16) ID_CMD;	flashtest /* device ID */  = *(volatile __u16 *) (baseaddr + 2);	*(volatile __u16 *) (baseaddr + ID_ADDR) = (__u16) RESET_CMD;	/* toggling_bits = (flashtest == TOSHIBA)?(DQ6):(DQ2|DQ6); */	toggling_bits = (DQ2 | DQ6);	switch ((__u32) ((flashtest << 16) + flashtest)) {	case AMD_ID_LV160B:		info->flash_id +=			(FLASH_AM160LV | FLASH_AM160B) & FLASH_TYPEMASK;		info->sector_count = CFG_MAX_FLASH_SECT;		info->size = CFG_FLASH_SIZE;		/* 1*16K Boot Block		   2*8K Parameter Block		   1*32K Small Main Block */		info->start[0] = baseaddr;		info->start[1] = baseaddr + 0x4000;		info->start[2] = baseaddr + 0x6000;		info->start[3] = baseaddr + 0x8000;		for (i = 1; i < info->sector_count; i++)			info->start[3 + i] = baseaddr + i * CFG_MAIN_SECT_SIZE;		break;	default:		info->flash_id = FLASH_UNKNOWN;		return (0);	/* no or unknown flash */	}	for (i = 0; i < info->sector_count; i++) {		/* Write auto select command sequence and test FLASH answer */		WRITE_UNLOCK (info->start[i]);		*(volatile __u16 *) (info->start[i] + ID_ADDR) = (__u16) ID_CMD;		flashtest /* protected verify */  = *(volatile __u16 *) (info->start[i] + 4);		*(volatile __u16 *) (info->start[i] + ID_ADDR) = (__u16) RESET_CMD;		if (flashtest & 0x0001) {			info->protect[i] = 1;	/* D0 = 1 if protected */		} else {			info->protect[i] = 0;		}	}	return (info->size);}/*----------------------------------------------------------------------- */ulong flash_init (void){	ulong size = 0;	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 (only one bank) */	size = flash_get_size (CFG_FLASH_BASE, &flash_info[0]);	if (flash_info[0].flash_id == FLASH_UNKNOWN || size == 0) {		printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",			size, size >> 20);	}	/*	 * protect monitor and environment sectors	 */	flash_protect (FLAG_PROTECT_SET,		       CFG_FLASH_BASE,		       CFG_FLASH_BASE + monitor_flash_len - 1,		       &flash_info[0]);	flash_protect (FLAG_PROTECT_SET,		       CFG_ENV_ADDR,		       CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0]);	return size;}/*----------------------------------------------------------------------- */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_AMDL323B:		printf ("29DL323B (32 M, bottom sector)\n");		break;	case (FLASH_AM160LV | FLASH_AM160B):		printf ("29LV160BE (1M x 16, bottom sector)\n");		break;	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 % 4) == 0)			printf ("\n   ");		printf (" S%02d @ 0x%08lX%s", i,			info->start[i], info->protect[i] ? " !" : "  ");	}	printf ("\n");	return;}/*----------------------------------------------------------------------- */int flash_check_protection (flash_info_t * info, int s_first, int s_last){	int sect, prot = 0;	for (sect = s_first; sect <= s_last; sect++)		if (info->protect[sect])			prot++;	if (prot)		printf ("- can't erase %d protected sectors\n", prot);	return prot;}/*----------------------------------------------------------------------- */int flash_check_erase_amd (ulong start){	__u16 v1, v2;	v1 = *(volatile __u16 *) (start);	v2 = *(volatile __u16 *) (start);	if (((v1 ^ v2) & toggling_bits) == toggling_bits) {		if (((v1 | v2) & DQ5) == DQ5) {			printf ("[DQ5] ");			/* OOPS: exceeded timing limits */			v1 = *(volatile __u16 *) (start);			v2 = *(volatile __u16 *) (start);			if (((v1 ^ v2) & toggling_bits) == toggling_bits) {				printf ("[%s] ",					((toggling_bits & (DQ2 | DQ6)) ==					 (DQ2 | DQ6)) ? "DQ2,DQ6" : "DQ6");				/* OOPS: there is an erasure in progress,				 *       try to reset chip */				*(volatile __u16 *) (start) =					(__u16) RESET_CMD;				return 1;	/* still busy */			}		}		return 1;	/* still busy */	}	return 0;		/* be free */}/*----------------------------------------------------------------------- */int flash_erase (flash_info_t * info, int s_first, int s_last){	int flag, sect, setup_offset = 0;	int rc = ERR_OK;	if (info->flash_id == FLASH_UNKNOWN) {		printf ("- missing\n");		return ERR_UNKNOWN_FLASH_TYPE;	}	if ((s_first < 0) || (s_first > s_last)) {		printf ("- no sectors to erase\n");		return ERR_INVAL;	}	if (flash_check_protection (info, s_first, s_last))		return ERR_PROTECTED;	switch (info->flash_id & FLASH_VENDMASK) {	case FLASH_MAN_FUJ:	case FLASH_MAN_AMD:		switch (info->flash_id & FLASH_TYPEMASK) {		case (FLASH_AM160LV | FLASH_AM160B):			setup_offset = UNLOCK_ADDR1;	/* just the adress for setup_cmd differs */		case FLASH_AMDL323B:			/*			 * Disable interrupts which might cause a timeout			 * here. Remember that our exception vectors are			 * at address 0 in the flash, and we don't want a			 * (ticker) exception to happen while the flash			 * chip is in programming mode.			 */			flag = disable_interrupts ();			/* Start erase on unprotected sectors */			for (sect = s_first; sect <= s_last && !ctrlc ();			     sect++) {				printf ("Erasing sector %2d ... ", sect);				if (info->protect[sect] == 0) {					/* not protected */					/* Write sector erase command sequence */					WRITE_UNLOCK (info->start[0]);					*(volatile __u16 *) (info->start[0] +							     setup_offset) =						(__u16) SETUP_CMD;					WRITE_UNLOCK (info->start[0]);					*(volatile __u16 *) (info->							     start[sect]) =						(__u16) SECERASE_CMD;					/* wait some time */					reset_timer_masked ();					while (get_timer_masked () < 1000) {					}					/* arm simple, non interrupt dependent timer */					reset_timer_masked ();					while (flash_check_erase_amd (info->start[sect])) {						if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {							printf ("timeout!\n");							/* OOPS: reach timeout,							 * try to reset chip							 */							*(volatile __u16 *) (info-> start[sect]) = (__u16) RESET_CMD;							rc = ERR_TIMOUT;							goto outahere_323B;						}					}					printf ("ok.\n");				} else {					printf ("protected!\n");				}			}			if (ctrlc ())				printf ("User Interrupt!\n");outahere_323B:			/* allow flash to settle - wait 10 ms */			udelay_masked (10000);			if (flag)				enable_interrupts ();			return rc;		default:			printf ("- unknown chip type\n");			return ERR_UNKNOWN_FLASH_TYPE;		}		break;	default:		printf ("- unknown vendor ");		return ERR_UNKNOWN_FLASH_VENDOR;	}}/*----------------------------------------------------------------------- */int flash_check_write_amd (ulong dest){	__u16 v1, v2;	v1 = *(volatile __u16 *) (dest);	v2 = *(volatile __u16 *) (dest);	/* DQ6 toggles during write */	if (((v1 ^ v2) & DQ6) == DQ6) {		if (((v1 | v2) & DQ5) == DQ5) {			printf ("[DQ5] @ %08lX\n", dest);			/* OOPS: exceeded timing limits,			 *       try to reset chip */			*(volatile __u16 *) (dest) = (__u16) RESET_CMD;			return 0;	/* be free */		}		return 1;	/* still busy */	}	return 0;		/* be free */}/*----------------------------------------------------------------------- * Copy memory to flash */static int write_word (flash_info_t * info, ulong dest, ushort data){	int rc = ERR_OK;	int flag;	/* Check if Flash is (sufficiently) erased */	if ((*(__u16 *) (dest) & data) != data)		return ERR_NOT_ERASED;	/*	 * Disable interrupts which might cause a timeout	 * here. Remember that our exception vectors are	 * at address 0 in the flash, and we don't want a	 * (ticker) exception to happen while the flash	 * chip is in programming mode.	 */	flag = disable_interrupts ();	/* Write program command sequence */	WRITE_UNLOCK (info->start[0]);	/* Flash dependend program seqence */	switch (info->flash_id & FLASH_VENDMASK) {	case FLASH_MAN_FUJ:	case FLASH_MAN_AMD:		switch (info->flash_id & FLASH_TYPEMASK) {		case (FLASH_AM160LV | FLASH_AM160B):			*(volatile __u16 *) (info->start[0] + UNLOCK_ADDR1) =				(__u16) PROG_CMD;			*(volatile __u16 *) (dest) = (__u16) data;			break;		case FLASH_AMDL323B:			*(volatile __u16 *) (dest) = (__u16) PROG_CMD;			*(volatile __u16 *) (dest) = (__u16) data;			break;		}	}	/* arm simple, non interrupt dependent timer */	reset_timer_masked ();	while (flash_check_write_amd (dest)) {		if (get_timer_masked () > CFG_FLASH_WRITE_TOUT) {			printf ("timeout! @ %08lX\n", dest);			/* OOPS: reach timeout,			 *       try to reset chip */			*(volatile __u16 *) (dest) = (__u16) RESET_CMD;			rc = ERR_TIMOUT;			goto outahere_323B;		}	}	/* Check if Flash was (accurately) written */	if (*(__u16 *) (dest) != data)		rc = ERR_PROG_ERROR;outahere_323B:	if (flag)		enable_interrupts ();	return rc;}/*----------------------------------------------------------------------- * Copy memory to flash. */int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt){	ulong cp, wp;	ushort data;	int l;	int i, rc;	wp = (addr & ~1);	/* 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 << 8);		}		for (; i < 2 && cnt > 0; ++i) {			data = (data >> 8) | (*src++ << 8);			--cnt;			++cp;		}		for (; cnt == 0 && i < 2; ++i, ++cp) {			data = (data >> 8) | (*(uchar *) cp << 8);		}		if ((rc = write_word (info, wp, data)) != 0) {			return (rc);		}		wp += 2;	}	/*	 * handle word aligned part	 */	while (cnt >= 2) {		data = *((ushort *) src);		if ((rc = write_word (info, wp, data)) != 0)			return (rc);		src += 2;		wp += 2;		cnt -= 2;	}	if (cnt == 0)		return ERR_OK;	/*	 * handle unaligned tail bytes	 */	data = 0;	for (i = 0, cp = wp; i < 2 && cnt > 0; ++i, ++cp) {		data = (data >> 8) | (*src++ << 8);		--cnt;	}	for (; i < 2; ++i, ++cp) {		data = (data >> 8) | (*(uchar *) cp << 8);	}	return write_word (info, wp, data);}