[people/ms/u-boot.git] / board / modnet50 / flash.c

/*
 * (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,
		       CONFIG_ENV_ADDR,
		       CONFIG_ENV_ADDR + CONFIG_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);
}
Commit	Line	Data
2d1a537d WD	1	/*
	2	* (C) Copyright 2002
	3	* MAZeT GmbH <www.mazet.de>
	4	* Stephan Linz <linz@mazet.de>, <linz@li-pro.net>
	5	*
	6	* The most stuff comes from PPCBoot and Linux.
	7	*
	8	* IMMS gGmbH <www.imms.de>
	9	* Thomas Elste <info@elste.org>
	10	*
	11	* Modifications for ModNET50 Board
	12	*
	13	* See file CREDITS for list of people who contributed to this
	14	* project.
	15	*
	16	* This program is free software; you can redistribute it and/or
	17	* modify it under the terms of the GNU General Public License as
	18	* published by the Free Software Foundation; either version 2 of
	19	* the License, or (at your option) any later version.
	20	*
	21	* This program is distributed in the hope that it will be useful,
	22	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	23	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	24	* GNU General Public License for more details.
	25	*
	26	* You should have received a copy of the GNU General Public License
	27	* along with this program; if not, write to the Free Software
	28	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	29	* MA 02111-1307 USA
	30	*/
	31
	32	#include <common.h>
	33	#include <asm/arch/netarm_registers.h>
	34
	35	#define SCR ((volatile unsigned int )(NETARM_GEN_MODULE_BASE + NETARM_GEN_SYSTEM_CONTROL))
	36
	37	#define ALIGN_ABORT_OFF SCR = SCR & ~NETARM_GEN_SYS_CFG_ALIGN_ABORT
	38	#define ALIGN_ABORT_ON SCR = SCR \| NETARM_GEN_SYS_CFG_ALIGN_ABORT
	39
	40	#define PROG_ADDR (0x555*2)
	41	#define SETUP_ADDR (0x555*2)
	42	#define ID_ADDR (0x555*2)
	43	#define UNLOCK_ADDR1 (0x555*2)
	44	#define UNLOCK_ADDR2 (0x2AA*2)
	45
	46	#define UNLOCK_CMD1 (0xAA)
	47	#define UNLOCK_CMD2 (0x55)
	48	#define ERASE_SUSPEND_CMD (0xB0)
	49	#define ERASE_RESUME_CMD (0x30)
	50	#define RESET_CMD (0xF0)
	51	#define ID_CMD (0x90)
	52	#define SECERASE_CMD (0x30)
	53	#define CHIPERASE_CMD (0x10)
	54	#define PROG_CMD (0xa0)
	55	#define SETUP_CMD (0x80)
	56
	57	#define DQ2 (0x04)
	58	#define DQ3 (DQ2*2)
	59	#define DQ5 (DQ3*4)
	60	#define DQ6 (DQ5*2)
	61
	62	#define WRITE_UNLOCK(addr) { \
	63	(volatile __u16)(addr + UNLOCK_ADDR1) = (__u16)UNLOCK_CMD1; \
	64	(volatile __u16)(addr + UNLOCK_ADDR2) = (__u16)UNLOCK_CMD2; \
65	}
66
67	#define CONFIG_AM29_RESERVED (0)
68	#define K (1024)
69	#define MB (4)
70
71	#define CELL_SIZE (64*K)
72	#define DEVICE_SIZE (MBKK)
73	#define CELLS_PER_DEVICE (DEVICE_SIZE/CELL_SIZE)
74	#define RESERVED_CELLS (CONFIG_AM29_RESERVED*K)/CELL_SIZE
75	#define MAX_FLASH_DEVICES (1)
76	#define AVAIL_SIZE (DEVICE_SIZEMAX_FLASH_DEVICES - RESERVED_CELLSCELL_SIZE)
77
78
79	flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
80	static __u16 toggling_bits;
81
82
83	/*-----------------------------------------------------------------------
84	*/
85	ulong flash_get_size (ulong baseaddr, flash_info_t * info)
86	{
87	short i;
88	__u16 flashtest;
89
90	/* Write auto select command sequence and test FLASH answer */
91	WRITE_UNLOCK (baseaddr);
92	(volatile __u16 ) (baseaddr + ID_ADDR) = (__u16) ID_CMD;
93	flashtest /* manufacturer ID / = (volatile __u16 *) (baseaddr);
94	(volatile __u16 ) (baseaddr + ID_ADDR) = (__u16) RESET_CMD;
95
96	switch ((__u32) ((flashtest << 16) + flashtest)) {
97	case AMD_MANUFACT:
98	info->flash_id = FLASH_MAN_AMD & FLASH_VENDMASK;
99	break;
100	case FUJ_MANUFACT:
101	info->flash_id = FLASH_MAN_FUJ & FLASH_VENDMASK;
102	break;
103	default:
104	info->flash_id = FLASH_UNKNOWN;
105	info->sector_count = 0;
106	info->size = 0;
107	return (0); /* no or unknown flash */
108	}
109
110	/* Write auto select command sequence and test FLASH answer */
111	WRITE_UNLOCK (baseaddr);
112	(volatile __u16 ) (baseaddr + ID_ADDR) = (__u16) ID_CMD;
113	flashtest /* device ID / = (volatile __u16 *) (baseaddr + 2);
114	(volatile __u16 ) (baseaddr + ID_ADDR) = (__u16) RESET_CMD;
115
116	/* toggling_bits = (flashtest == TOSHIBA)?(DQ6):(DQ2\|DQ6); */
117	toggling_bits = (DQ2 \| DQ6);
118
119	switch ((__u32) ((flashtest << 16) + flashtest)) {
120	case AMD_ID_LV160B:
121	info->flash_id +=
122	(FLASH_AM160LV \| FLASH_AM160B) & FLASH_TYPEMASK;
123	info->sector_count = CFG_MAX_FLASH_SECT;
124	info->size = CFG_FLASH_SIZE;
125	/* 1*16K Boot Block
126	2*8K Parameter Block
127	132K Small Main Block /
128	info->start[0] = baseaddr;
129	info->start[1] = baseaddr + 0x4000;
130	info->start[2] = baseaddr + 0x6000;
131	info->start[3] = baseaddr + 0x8000;
132	for (i = 1; i < info->sector_count; i++)
133	info->start[3 + i] = baseaddr + i * CFG_MAIN_SECT_SIZE;
134	break;
135	default:
136	info->flash_id = FLASH_UNKNOWN;
137	return (0); /* no or unknown flash */
138	}
139
140	for (i = 0; i < info->sector_count; i++) {
141	/* Write auto select command sequence and test FLASH answer */
142	WRITE_UNLOCK (info->start[i]);
143	(volatile __u16 ) (info->start[i] + ID_ADDR) = (__u16) ID_CMD;
144	flashtest /* protected verify / = (volatile __u16 *) (info->start[i] + 4);
145	(volatile __u16 ) (info->start[i] + ID_ADDR) = (__u16) RESET_CMD;
146	if (flashtest & 0x0001) {
147	info->protect[i] = 1; /* D0 = 1 if protected */
148	} else {
149	info->protect[i] = 0;
150	}
151	}
152	return (info->size);
153	}
154
155	/*-----------------------------------------------------------------------
156	*/
157	ulong flash_init (void)
158	{
159	ulong size = 0;
160	int i;
161
162	/* Init: no FLASHes known */
163	for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
164	flash_info[i].flash_id = FLASH_UNKNOWN;
165	}
166
167	/* Static FLASH Bank configuration here (only one bank) */
168	size = flash_get_size (CFG_FLASH_BASE, &flash_info[0]);
169
170	if (flash_info[0].flash_id == FLASH_UNKNOWN \|\| size == 0) {
171	printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
172	size, size >> 20);
173	}
174
175	/*
176	* protect monitor and environment sectors
177	*/
178	flash_protect (FLAG_PROTECT_SET,
179	CFG_FLASH_BASE,
180	CFG_FLASH_BASE + monitor_flash_len - 1,
181	&flash_info[0]);
182
183	flash_protect (FLAG_PROTECT_SET,
0e8d1586 JCPV	184	CONFIG_ENV_ADDR,
0e8d1586 JCPV	185	CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0]);
2d1a537d WD	186
	187	return size;
	188	}
	189
	190	/*-----------------------------------------------------------------------
	191	*/
	192	void flash_print_info (flash_info_t * info)
	193	{
	194	int i;
	195
	196	if (info->flash_id == FLASH_UNKNOWN) {
	197	printf ("missing or unknown FLASH type\n");
	198	return;
	199	}
	200
	201	switch (info->flash_id & FLASH_VENDMASK) {
	202	case FLASH_MAN_AMD:
	203	printf ("AMD ");
	204	break;
	205	case FLASH_MAN_FUJ:
	206	printf ("Fujitsu ");
	207	break;
	208	default:
	209	printf ("Unknown Vendor ");
	210	break;
	211	}
	212
	213	switch (info->flash_id & FLASH_TYPEMASK) {
	214	case FLASH_AMDL323B:
	215	printf ("29DL323B (32 M, bottom sector)\n");
	216	break;
	217	case (FLASH_AM160LV \| FLASH_AM160B):
	218	printf ("29LV160BE (1M x 16, bottom sector)\n");
	219	break;
	220	default:
	221	printf ("Unknown Chip Type\n");
	222	break;
	223	}
	224
	225	printf (" Size: %ld MB in %d Sectors\n",
	226	info->size >> 20, info->sector_count);
	227	printf (" Sector Start Addresses:");
	228	for (i = 0; i < info->sector_count; i++) {
	229	if ((i % 4) == 0)
	230	printf ("\n ");
	231	printf (" S%02d @ 0x%08lX%s", i,
	232	info->start[i], info->protect[i] ? " !" : " ");
	233	}
	234	printf ("\n");
	235	return;
	236	}
	237
	238	/*-----------------------------------------------------------------------
	239	*/
	240	int flash_check_protection (flash_info_t * info, int s_first, int s_last)
	241	{
	242	int sect, prot = 0;
	243
	244	for (sect = s_first; sect <= s_last; sect++)
	245	if (info->protect[sect])
	246	prot++;
	247	if (prot)
	248	printf ("- can't erase %d protected sectors\n", prot);
	249	return prot;
250	}
251
252	/*-----------------------------------------------------------------------
253	*/
254	int flash_check_erase_amd (ulong start)
255	{
256	__u16 v1, v2;
257
258	v1 = (volatile __u16 ) (start);
259	v2 = (volatile __u16 ) (start);
260
261	if (((v1 ^ v2) & toggling_bits) == toggling_bits) {
262	if (((v1 \| v2) & DQ5) == DQ5) {
263	printf ("[DQ5] ");
264	/* OOPS: exceeded timing limits */
265
266	v1 = (volatile __u16 ) (start);
267	v2 = (volatile __u16 ) (start);
268
269	if (((v1 ^ v2) & toggling_bits) == toggling_bits) {
270
271	printf ("[%s] ",
272	((toggling_bits & (DQ2 \| DQ6)) ==
273	(DQ2 \| DQ6)) ? "DQ2,DQ6" : "DQ6");
274
275	/* OOPS: there is an erasure in progress,
276	* try to reset chip */
277	(volatile __u16 ) (start) =
278	(__u16) RESET_CMD;
279
280	return 1; /* still busy */
281	}
282	}
283	return 1; /* still busy */
284	}
285	return 0; /* be free */
286	}
287
288	/*-----------------------------------------------------------------------
289	*/
290	int flash_erase (flash_info_t * info, int s_first, int s_last)
291	{
292	int flag, sect, setup_offset = 0;
293	int rc = ERR_OK;
294
295	if (info->flash_id == FLASH_UNKNOWN) {
296	printf ("- missing\n");
297	return ERR_UNKNOWN_FLASH_TYPE;
298	}
299
300	if ((s_first < 0) \|\| (s_first > s_last)) {
301	printf ("- no sectors to erase\n");
302	return ERR_INVAL;
303	}
304
305	if (flash_check_protection (info, s_first, s_last))
306	return ERR_PROTECTED;
307
308	switch (info->flash_id & FLASH_VENDMASK) {
309	case FLASH_MAN_FUJ:
310	case FLASH_MAN_AMD:
311	switch (info->flash_id & FLASH_TYPEMASK) {
312	case (FLASH_AM160LV \| FLASH_AM160B):
313	setup_offset = UNLOCK_ADDR1; /* just the adress for setup_cmd differs */
314	case FLASH_AMDL323B:
cd0a9de6	315	/*
2d1a537d WD	316	* Disable interrupts which might cause a timeout
	317	* here. Remember that our exception vectors are
	318	* at address 0 in the flash, and we don't want a
	319	* (ticker) exception to happen while the flash
	320	* chip is in programming mode.
	321	*/
	322	flag = disable_interrupts ();
	323	/* Start erase on unprotected sectors */
	324	for (sect = s_first; sect <= s_last && !ctrlc ();
	325	sect++) {
	326	printf ("Erasing sector %2d ... ", sect);
	327
	328	if (info->protect[sect] == 0) {
	329	/* not protected */
	330	/* Write sector erase command sequence */
	331	WRITE_UNLOCK (info->start[0]);
	332	(volatile __u16 ) (info->start[0] +
	333	setup_offset) =
	334	(__u16) SETUP_CMD;
	335	WRITE_UNLOCK (info->start[0]);
	336	(volatile __u16 ) (info->
	337	start[sect]) =
	338	(__u16) SECERASE_CMD;
	339
	340	/* wait some time */
	341	reset_timer_masked ();
	342	while (get_timer_masked () < 1000) {
	343	}
	344
	345	/* arm simple, non interrupt dependent timer */
	346	reset_timer_masked ();
	347	while (flash_check_erase_amd (info->start[sect])) {
	348	if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
	349	printf ("timeout!\n");
	350	/* OOPS: reach timeout,
	351	* try to reset chip
	352	*/
	353	(volatile __u16 ) (info-> start[sect]) = (__u16) RESET_CMD;
	354	rc = ERR_TIMOUT;
	355	goto outahere_323B;
	356	}
	357	}
	358	printf ("ok.\n");
	359	} else {
	360	printf ("protected!\n");
	361	}
	362	}
	363	if (ctrlc ())
	364	printf ("User Interrupt!\n");
	365	outahere_323B:
	366	/* allow flash to settle - wait 10 ms */
	367	udelay_masked (10000);
	368	if (flag)
	369	enable_interrupts ();
	370	return rc;
	371	default:
	372	printf ("- unknown chip type\n");
	373	return ERR_UNKNOWN_FLASH_TYPE;
	374	}
	375	break;
	376	default:
	377	printf ("- unknown vendor ");
	378	return ERR_UNKNOWN_FLASH_VENDOR;
	379	}
380	}
381
382	/*-----------------------------------------------------------------------
383	*/
384	int flash_check_write_amd (ulong dest)
385	{
386	__u16 v1, v2;
387
388	v1 = (volatile __u16 ) (dest);
389	v2 = (volatile __u16 ) (dest);
390
391	/* DQ6 toggles during write */
392	if (((v1 ^ v2) & DQ6) == DQ6) {
393	if (((v1 \| v2) & DQ5) == DQ5) {
394	printf ("[DQ5] @ %08lX\n", dest);
395
396	/* OOPS: exceeded timing limits,
397	* try to reset chip */
398	(volatile __u16 ) (dest) = (__u16) RESET_CMD;
399	return 0; /* be free */
400	}
401	return 1; /* still busy */
402	}
403
404	return 0; /* be free */
405	}
406
407	/*-----------------------------------------------------------------------
408	* Copy memory to flash
409	*/
410	static int write_word (flash_info_t * info, ulong dest, ushort data)
411	{
412	int rc = ERR_OK;
413	int flag;
414
415	/* Check if Flash is (sufficiently) erased */
416	if (((__u16 ) (dest) & data) != data)
417	return ERR_NOT_ERASED;
418
cd0a9de6	419	/*
2d1a537d WD	420	* Disable interrupts which might cause a timeout
	421	* here. Remember that our exception vectors are
	422	* at address 0 in the flash, and we don't want a
	423	* (ticker) exception to happen while the flash
	424	* chip is in programming mode.
	425	*/
	426	flag = disable_interrupts ();
	427
	428	/* Write program command sequence */
	429	WRITE_UNLOCK (info->start[0]);
	430
	431	/* Flash dependend program seqence */
	432	switch (info->flash_id & FLASH_VENDMASK) {
	433	case FLASH_MAN_FUJ:
	434	case FLASH_MAN_AMD:
	435	switch (info->flash_id & FLASH_TYPEMASK) {
	436	case (FLASH_AM160LV \| FLASH_AM160B):
	437	(volatile __u16 ) (info->start[0] + UNLOCK_ADDR1) =
	438	(__u16) PROG_CMD;
	439	(volatile __u16 ) (dest) = (__u16) data;
	440	break;
	441	case FLASH_AMDL323B:
	442	(volatile __u16 ) (dest) = (__u16) PROG_CMD;
	443	(volatile __u16 ) (dest) = (__u16) data;
	444	break;
	445	}
	446	}
	447
	448	/* arm simple, non interrupt dependent timer */
	449	reset_timer_masked ();
	450
	451	while (flash_check_write_amd (dest)) {
	452	if (get_timer_masked () > CFG_FLASH_WRITE_TOUT) {
	453	printf ("timeout! @ %08lX\n", dest);
	454	/* OOPS: reach timeout,
	455	* try to reset chip */
	456	(volatile __u16 ) (dest) = (__u16) RESET_CMD;
	457
	458	rc = ERR_TIMOUT;
	459	goto outahere_323B;
	460	}
	461	}
	462
	463	/* Check if Flash was (accurately) written */
	464	if ((__u16 ) (dest) != data)
	465	rc = ERR_PROG_ERROR;
	466
	467	outahere_323B:
	468	if (flag)
	469	enable_interrupts ();
	470	return rc;
	471	}
	472
	473	/*-----------------------------------------------------------------------
	474	* Copy memory to flash.
	475	*/
	476	int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
	477	{
	478	ulong cp, wp;
	479	ushort data;
	480	int l;
	481	int i, rc;
	482
	483	wp = (addr & ~1); /* get lower word aligned address */
484
485	/*
486	* handle unaligned start bytes
487	*/
488	if ((l = addr - wp) != 0) {
489	data = 0;
490	for (i = 0, cp = wp; i < l; ++i, ++cp) {
491	data = (data >> 8) \| ((uchar ) cp << 8);
492	}
493	for (; i < 2 && cnt > 0; ++i) {
494	data = (data >> 8) \| (*src++ << 8);
495	--cnt;
496	++cp;
497	}
498	for (; cnt == 0 && i < 2; ++i, ++cp) {
499	data = (data >> 8) \| ((uchar ) cp << 8);
500	}
501
502	if ((rc = write_word (info, wp, data)) != 0) {
503	return (rc);
504	}
505	wp += 2;
506	}
507
508	/*
509	* handle word aligned part
510	*/
511	while (cnt >= 2) {
512	data = ((ushort ) src);
513	if ((rc = write_word (info, wp, data)) != 0)
514	return (rc);
515	src += 2;
516	wp += 2;
517	cnt -= 2;
518	}
519
520	if (cnt == 0)
521	return ERR_OK;
522
523	/*
524	* handle unaligned tail bytes
525	*/
526	data = 0;
527	for (i = 0, cp = wp; i < 2 && cnt > 0; ++i, ++cp) {
528	data = (data >> 8) \| (*src++ << 8);
529	--cnt;
530	}
531	for (; i < 2; ++i, ++cp) {
532	data = (data >> 8) \| ((uchar ) cp << 8);
533	}
534
535	return write_word (info, wp, data);
536	}