[J-u-boot.git] / board / netta2 / flash.c

/*
 * (C) Copyright 2000-2004
 * Wolfgang Denk, DENX Software Engineering, [email protected].
 *
 * 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>

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_byte(flash_info_t * info, ulong dest, uchar data);
static void flash_get_offsets(ulong base, flash_info_t * info);

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

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

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

	size = 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, size << 20);
	}

	/* Remap FLASH according to real size */
	memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size & 0xFFFF8000);
	memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | (memctl->memc_br0 & ~(BR_BA_MSK));

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

	flash_get_offsets(CFG_FLASH_BASE, &flash_info[0]);

	/* monitor protection ON by default */
	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]);

#ifdef CFG_ENV_ADDR_REDUND
	flash_protect ( FLAG_PROTECT_SET,
			CFG_ENV_ADDR_REDUND,
			CFG_ENV_ADDR_REDUND + CFG_ENV_SIZE_REDUND - 1,
			&flash_info[0]);
#endif

	flash_info[0].size = size;

	return (size);
}

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

	/* set up sector start address table */
	if ((info->flash_id & FLASH_TYPEMASK) == 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;
		}
	}
}

/*-----------------------------------------------------------------------
 */
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;
	case FLASH_MAN_MX:
		printf("MXIC ");
		break;
	default:
		printf("Unknown Vendor ");
		break;
	}

	switch (info->flash_id & FLASH_TYPEMASK) {
	case FLASH_AM040:
		printf("AM29LV040B (4 Mbit, bottom boot sect)\n");
		break;
	case FLASH_AM400B:
		printf("AM29LV400B (4 Mbit, bottom boot sect)\n");
		break;
	case FLASH_AM400T:
		printf("AM29LV400T (4 Mbit, top boot sector)\n");
		break;
	case FLASH_AM800B:
		printf("AM29LV800B (8 Mbit, bottom boot sect)\n");
		break;
	case FLASH_AM800T:
		printf("AM29LV800T (8 Mbit, top boot sector)\n");
		break;
	case FLASH_AM160B:
		printf("AM29LV160B (16 Mbit, bottom boot sect)\n");
		break;
	case FLASH_AM160T:
		printf("AM29LV160T (16 Mbit, top boot sector)\n");
		break;
	case FLASH_AM320B:
		printf("AM29LV320B (32 Mbit, bottom boot sect)\n");
		break;
	case FLASH_AM320T:
		printf("AM29LV320T (32 Mbit, top boot 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 % 5) == 0)
			printf("\n   ");
		printf(" %08lX%s", info->start[i], info->protect[i] ? " (RO)" : "     ");
	}
	printf("\n");
}

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


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

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

static ulong flash_get_size(vu_long * addr, flash_info_t * info)
{
	short i;
	uchar mid;
	uchar pid;
	vu_char *caddr = (vu_char *) addr;
	ulong base = (ulong) addr;

	/* Write auto select command: read Manufacturer ID */
	caddr[0x0555] = 0xAA;
	caddr[0x02AA] = 0x55;
	caddr[0x0555] = 0x90;

	mid = caddr[0];
	switch (mid) {
	case (AMD_MANUFACT & 0xFF):
		info->flash_id = FLASH_MAN_AMD;
		break;
	case (FUJ_MANUFACT & 0xFF):
		info->flash_id = FLASH_MAN_FUJ;
		break;
	case (MX_MANUFACT & 0xFF):
		info->flash_id = FLASH_MAN_MX;
		break;
	case (STM_MANUFACT & 0xFF):
		info->flash_id = FLASH_MAN_STM;
		break;
	default:
		info->flash_id = FLASH_UNKNOWN;
		info->sector_count = 0;
		info->size = 0;
		return (0);				/* no or unknown flash  */
	}

	pid = caddr[1];				/* device ID        */
	switch (pid) {
	case (AMD_ID_LV400T & 0xFF):
		info->flash_id += FLASH_AM400T;
		info->sector_count = 11;
		info->size = 0x00080000;
		break;					/* => 512 kB        */

	case (AMD_ID_LV400B & 0xFF):
		info->flash_id += FLASH_AM400B;
		info->sector_count = 11;
		info->size = 0x00080000;
		break;					/* => 512 kB        */

	case (AMD_ID_LV800T & 0xFF):
		info->flash_id += FLASH_AM800T;
		info->sector_count = 19;
		info->size = 0x00100000;
		break;					/* => 1 MB      */

	case (AMD_ID_LV800B & 0xFF):
		info->flash_id += FLASH_AM800B;
		info->sector_count = 19;
		info->size = 0x00100000;
		break;					/* => 1 MB      */

	case (AMD_ID_LV160T & 0xFF):
		info->flash_id += FLASH_AM160T;
		info->sector_count = 35;
		info->size = 0x00200000;
		break;					/* => 2 MB      */

	case (AMD_ID_LV160B & 0xFF):
		info->flash_id += FLASH_AM160B;
		info->sector_count = 35;
		info->size = 0x00200000;
		break;					/* => 2 MB      */

	case (AMD_ID_LV040B & 0xFF):
		info->flash_id += FLASH_AM040;
		info->sector_count = 8;
		info->size = 0x00080000;
		break;

	case (STM_ID_M29W040B & 0xFF):
		info->flash_id += FLASH_AM040;
		info->sector_count = 8;
		info->size = 0x00080000;
		break;

#if 0							/* enable when device IDs are available */
	case (AMD_ID_LV320T & 0xFF):
		info->flash_id += FLASH_AM320T;
		info->sector_count = 67;
		info->size = 0x00400000;
		break;					/* => 4 MB      */

	case (AMD_ID_LV320B & 0xFF):
		info->flash_id += FLASH_AM320B;
		info->sector_count = 67;
		info->size = 0x00400000;
		break;					/* => 4 MB      */
#endif
	default:
		info->flash_id = FLASH_UNKNOWN;
		return (0);				/* => no or unknown flash */

	}

	printf(" ");
	/* set up sector start address table */
	if ((info->flash_id & FLASH_TYPEMASK) == 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: D0 = 1 if protected */
		caddr = (volatile unsigned char *)(info->start[i]);
		info->protect[i] = caddr[2] & 1;
	}

	/*
	 * Prevent writes to uninitialized FLASH.
	 */
	if (info->flash_id != FLASH_UNKNOWN) {
		caddr = (vu_char *) info->start[0];

		caddr[0x0555] = 0xAA;
		caddr[0x02AA] = 0x55;
		caddr[0x0555] = 0xF0;

		udelay(20000);
	}

	return (info->size);
}


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

int flash_erase(flash_info_t * info, int s_first, int s_last)
{
	vu_char *addr = (vu_char *) (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] = 0xAA;
	addr[0x02AA] = 0x55;
	addr[0x0555] = 0x80;
	addr[0x0555] = 0xAA;
	addr[0x02AA] = 0x55;

	/* Start erase on unprotected sectors */
	for (sect = s_first; sect <= s_last; sect++) {
		if (info->protect[sect] == 0) {	/* not protected */
			addr = (vu_char *) (info->start[sect]);
			addr[0] = 0x30;
			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_char *) (info->start[l_sect]);
	while ((addr[0] & 0x80) != 0x80) {
		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_char *) info->start[0];
	addr[0] = 0xF0;				/* 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)
{
	int rc;

	while (cnt > 0) {
		if ((rc = write_byte(info, addr++, *src++)) != 0) {
			return (rc);
		}
		--cnt;
	}

	return (0);
}

/*-----------------------------------------------------------------------
 * Write a word to Flash, returns:
 * 0 - OK
 * 1 - write timeout
 * 2 - Flash not erased
 */
static int write_byte(flash_info_t * info, ulong dest, uchar data)
{
	vu_char *addr = (vu_char *) (info->start[0]);
	ulong start;
	int flag;

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

	addr[0x0555] = 0xAA;
	addr[0x02AA] = 0x55;
	addr[0x0555] = 0xA0;

	*((vu_char *) dest) = data;

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

	/* data polling for D7 */
	start = get_timer(0);
	while ((*((vu_char *) dest) & 0x80) != (data & 0x80)) {
		if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
			return (1);
		}
	}
	return (0);
}
Commit	Line	Data
79fa88f3 WD	1	/*
	2	* (C) Copyright 2000-2004
	3	* Wolfgang Denk, DENX Software Engineering, [email protected].
	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
	27	flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
	28
	29	/*-----------------------------------------------------------------------
	30	* Functions
	31	*/
	32	static ulong flash_get_size(vu_long * addr, flash_info_t * info);
	33	static int write_byte(flash_info_t * info, ulong dest, uchar data);
	34	static void flash_get_offsets(ulong base, flash_info_t * info);
	35
	36	/*-----------------------------------------------------------------------
	37	*/
	38
	39	unsigned long flash_init(void)
	40	{
	41	volatile immap_t immap = (immap_t ) CFG_IMMR;
	42	volatile memctl8xx_t *memctl = &immap->im_memctl;
	43	unsigned long size;
	44	int i;
	45
	46	/* Init: no FLASHes known */
	47	for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i)
	48	flash_info[i].flash_id = FLASH_UNKNOWN;
	49
	50	size = flash_get_size((vu_long *) FLASH_BASE0_PRELIM, &flash_info[0]);
	51
	52	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
	53	printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
	54	size, size << 20);
	55	}
	56
	57	/* Remap FLASH according to real size */
	58	memctl->memc_or0 = CFG_OR_TIMING_FLASH \| (-size & 0xFFFF8000);
	59	memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) \| (memctl->memc_br0 & ~(BR_BA_MSK));
	60
	61	/* Re-do sizing to get full correct info */
	62	size = flash_get_size((vu_long *) CFG_FLASH_BASE, &flash_info[0]);
	63
	64	flash_get_offsets(CFG_FLASH_BASE, &flash_info[0]);
65
66	/* monitor protection ON by default */
67	flash_protect(FLAG_PROTECT_SET,
68	CFG_FLASH_BASE, CFG_FLASH_BASE + monitor_flash_len - 1,
69	&flash_info[0]);
70
71	flash_protect ( FLAG_PROTECT_SET,
72	CFG_ENV_ADDR,
73	CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
74	&flash_info[0]);
75
76	#ifdef CFG_ENV_ADDR_REDUND
77	flash_protect ( FLAG_PROTECT_SET,
78	CFG_ENV_ADDR_REDUND,
79	CFG_ENV_ADDR_REDUND + CFG_ENV_SIZE_REDUND - 1,
80	&flash_info[0]);
81	#endif
82
83	flash_info[0].size = size;
84
85	return (size);
86	}
87
88	/*-----------------------------------------------------------------------
89	*/
90	static void flash_get_offsets(ulong base, flash_info_t * info)
91	{
92	int i;
93
94	/* set up sector start address table */
95	if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
96	for (i = 0; i < info->sector_count; i++) {
97	info->start[i] = base + (i * 0x00010000);
98	}
99	} else if (info->flash_id & FLASH_BTYPE) {
100	/* set sector offsets for bottom boot block type */
101	info->start[0] = base + 0x00000000;
102	info->start[1] = base + 0x00004000;
103	info->start[2] = base + 0x00006000;
104	info->start[3] = base + 0x00008000;
105	for (i = 4; i < info->sector_count; i++) {
106	info->start[i] = base + (i * 0x00010000) - 0x00030000;
107	}
108	} else {
109	/* set sector offsets for top boot block type */
110	i = info->sector_count - 1;
111	info->start[i--] = base + info->size - 0x00004000;
112	info->start[i--] = base + info->size - 0x00006000;
113	info->start[i--] = base + info->size - 0x00008000;
114	for (; i >= 0; i--) {
115	info->start[i] = base + i * 0x00010000;
116	}
117	}
118	}
119
120	/*-----------------------------------------------------------------------
121	*/
122	void flash_print_info(flash_info_t * info)
123	{
124	int i;
125
126	if (info->flash_id == FLASH_UNKNOWN) {
127	printf("missing or unknown FLASH type\n");
128	return;
129	}
130
131	switch (info->flash_id & FLASH_VENDMASK) {
132	case FLASH_MAN_AMD:
133	printf("AMD ");
134	break;
135	case FLASH_MAN_FUJ:
136	printf("FUJITSU ");
137	break;
138	case FLASH_MAN_MX:
139	printf("MXIC ");
140	break;
141	default:
142	printf("Unknown Vendor ");
143	break;
144	}
145
146	switch (info->flash_id & FLASH_TYPEMASK) {
147	case FLASH_AM040:
148	printf("AM29LV040B (4 Mbit, bottom boot sect)\n");
149	break;
150	case FLASH_AM400B:
151	printf("AM29LV400B (4 Mbit, bottom boot sect)\n");
152	break;
153	case FLASH_AM400T:
154	printf("AM29LV400T (4 Mbit, top boot sector)\n");
155	break;
156	case FLASH_AM800B:
157	printf("AM29LV800B (8 Mbit, bottom boot sect)\n");
158	break;
159	case FLASH_AM800T:
160	printf("AM29LV800T (8 Mbit, top boot sector)\n");
161	break;
162	case FLASH_AM160B:
163	printf("AM29LV160B (16 Mbit, bottom boot sect)\n");
164	break;
165	case FLASH_AM160T:
166	printf("AM29LV160T (16 Mbit, top boot sector)\n");
167	break;
168	case FLASH_AM320B:
169	printf("AM29LV320B (32 Mbit, bottom boot sect)\n");
170	break;
171	case FLASH_AM320T:
172	printf("AM29LV320T (32 Mbit, top boot sector)\n");
173	break;
174	default:
175	printf("Unknown Chip Type\n");
176	break;
177	}
178
179	printf(" Size: %ld MB in %d Sectors\n", info->size >> 20, info->sector_count);
180
181	printf(" Sector Start Addresses:");
182	for (i = 0; i < info->sector_count; ++i) {
183	if ((i % 5) == 0)
184	printf("\n ");
185	printf(" %08lX%s", info->start[i], info->protect[i] ? " (RO)" : " ");
186	}
187	printf("\n");
188	}
189
190	/*-----------------------------------------------------------------------
191	*/
192
193
194	/*-----------------------------------------------------------------------
195	*/
196
197	/*
198	* The following code cannot be run from FLASH!
199	*/
200
201	static ulong flash_get_size(vu_long * addr, flash_info_t * info)
202	{
203	short i;
204	uchar mid;
205	uchar pid;
206	vu_char caddr = (vu_char ) addr;
207	ulong base = (ulong) addr;
208
209	/* Write auto select command: read Manufacturer ID */
210	caddr[0x0555] = 0xAA;
211	caddr[0x02AA] = 0x55;
212	caddr[0x0555] = 0x90;
213
214	mid = caddr[0];
215	switch (mid) {
216	case (AMD_MANUFACT & 0xFF):
217	info->flash_id = FLASH_MAN_AMD;
218	break;
219	case (FUJ_MANUFACT & 0xFF):
220	info->flash_id = FLASH_MAN_FUJ;
221	break;
222	case (MX_MANUFACT & 0xFF):
223	info->flash_id = FLASH_MAN_MX;
224	break;
225	case (STM_MANUFACT & 0xFF):
226	info->flash_id = FLASH_MAN_STM;
227	break;
228	default:
229	info->flash_id = FLASH_UNKNOWN;
230	info->sector_count = 0;
231	info->size = 0;
232	return (0); /* no or unknown flash */
233	}
234
235	pid = caddr[1]; /* device ID */
236	switch (pid) {
237	case (AMD_ID_LV400T & 0xFF):
238	info->flash_id += FLASH_AM400T;
239	info->sector_count = 11;
240	info->size = 0x00080000;
241	break; /* => 512 kB */
242
243	case (AMD_ID_LV400B & 0xFF):
244	info->flash_id += FLASH_AM400B;
245	info->sector_count = 11;
246	info->size = 0x00080000;
247	break; /* => 512 kB */
248
249	case (AMD_ID_LV800T & 0xFF):
250	info->flash_id += FLASH_AM800T;
251	info->sector_count = 19;
252	info->size = 0x00100000;
253	break; /* => 1 MB */
254
255	case (AMD_ID_LV800B & 0xFF):
256	info->flash_id += FLASH_AM800B;
257	info->sector_count = 19;
258	info->size = 0x00100000;
259	break; /* => 1 MB */
260
261	case (AMD_ID_LV160T & 0xFF):
262	info->flash_id += FLASH_AM160T;
263	info->sector_count = 35;
264	info->size = 0x00200000;
265	break; /* => 2 MB */
266
267	case (AMD_ID_LV160B & 0xFF):
268	info->flash_id += FLASH_AM160B;
269	info->sector_count = 35;
270	info->size = 0x00200000;
271	break; /* => 2 MB */
272
273	case (AMD_ID_LV040B & 0xFF):
274	info->flash_id += FLASH_AM040;
275	info->sector_count = 8;
276	info->size = 0x00080000;
277	break;
278
279	case (STM_ID_M29W040B & 0xFF):
280	info->flash_id += FLASH_AM040;
281	info->sector_count = 8;
282	info->size = 0x00080000;
283	break;
284
285	#if 0 /* enable when device IDs are available */
286	case (AMD_ID_LV320T & 0xFF):
287	info->flash_id += FLASH_AM320T;
288	info->sector_count = 67;
289	info->size = 0x00400000;
290	break; /* => 4 MB */
291
292	case (AMD_ID_LV320B & 0xFF):
293	info->flash_id += FLASH_AM320B;
294	info->sector_count = 67;
295	info->size = 0x00400000;
296	break; /* => 4 MB */
297	#endif
298	default:
299	info->flash_id = FLASH_UNKNOWN;
300	return (0); /* => no or unknown flash */
301
302	}
303
304	printf(" ");
305	/* set up sector start address table */
306	if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) {
307	for (i = 0; i < info->sector_count; i++) {
308	info->start[i] = base + (i * 0x00010000);
309	}
310	} else if (info->flash_id & FLASH_BTYPE) {
311	/* set sector offsets for bottom boot block type */
312	info->start[0] = base + 0x00000000;
313	info->start[1] = base + 0x00004000;
314	info->start[2] = base + 0x00006000;
315	info->start[3] = base + 0x00008000;
316	for (i = 4; i < info->sector_count; i++) {
317	info->start[i] = base + (i * 0x00010000) - 0x00030000;
318	}
319	} else {
320	/* set sector offsets for top boot block type */
321	i = info->sector_count - 1;
322	info->start[i--] = base + info->size - 0x00004000;
323	info->start[i--] = base + info->size - 0x00006000;
324	info->start[i--] = base + info->size - 0x00008000;
325	for (; i >= 0; i--) {
326	info->start[i] = base + i * 0x00010000;
327	}
328	}
329
330	/* check for protected sectors */
331	for (i = 0; i < info->sector_count; i++) {
332	/* read sector protection: D0 = 1 if protected */
333	caddr = (volatile unsigned char *)(info->start[i]);
334	info->protect[i] = caddr[2] & 1;
335	}
336
337	/*
338	* Prevent writes to uninitialized FLASH.
339	*/
340	if (info->flash_id != FLASH_UNKNOWN) {
341	caddr = (vu_char *) info->start[0];
342
343	caddr[0x0555] = 0xAA;
344	caddr[0x02AA] = 0x55;
345	caddr[0x0555] = 0xF0;
346
347	udelay(20000);
348	}
349
350	return (info->size);
351	}
352
353
354	/*-----------------------------------------------------------------------
355	*/
356
357	int flash_erase(flash_info_t * info, int s_first, int s_last)
358	{
359	vu_char addr = (vu_char ) (info->start[0]);
360	int flag, prot, sect, l_sect;
361	ulong start, now, last;
362
363	if ((s_first < 0) \|\| (s_first > s_last)) {
364	if (info->flash_id == FLASH_UNKNOWN) {
365	printf("- missing\n");
366	} else {
367	printf("- no sectors to erase\n");
368	}
369	return 1;
370	}
371
372	if ((info->flash_id == FLASH_UNKNOWN) \|\|
373	(info->flash_id > FLASH_AMD_COMP)) {
374	printf("Can't erase unknown flash type %08lx - aborted\n", info->flash_id);
375	return 1;
376	}
377
378	prot = 0;
379	for (sect = s_first; sect <= s_last; ++sect) {
380	if (info->protect[sect]) {
381	prot++;
382	}
383	}
384
385	if (prot) {
386	printf("- Warning: %d protected sectors will not be erased!\n", prot);
387	} else {
388	printf("\n");
389	}
390
391	l_sect = -1;
392
393	/* Disable interrupts which might cause a timeout here */
394	flag = disable_interrupts();
395
396	addr[0x0555] = 0xAA;
397	addr[0x02AA] = 0x55;
398	addr[0x0555] = 0x80;
399	addr[0x0555] = 0xAA;
400	addr[0x02AA] = 0x55;
401
402	/* Start erase on unprotected sectors */
403	for (sect = s_first; sect <= s_last; sect++) {
404	if (info->protect[sect] == 0) { /* not protected */
405	addr = (vu_char *) (info->start[sect]);
406	addr[0] = 0x30;
407	l_sect = sect;
408	}
409	}
410
411	/* re-enable interrupts if necessary */
412	if (flag)
413	enable_interrupts();
414
415	/* wait at least 80us - let's wait 1 ms */
416	udelay(1000);
417
418	/*
419	* We wait for the last triggered sector
420	*/
421	if (l_sect < 0)
422	goto DONE;
423
424	start = get_timer(0);
425	last = start;
426	addr = (vu_char *) (info->start[l_sect]);
427	while ((addr[0] & 0x80) != 0x80) {
428	if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
429	printf("Timeout\n");
430	return 1;
431	}
432	/* show that we're waiting */
433	if ((now - last) > 1000) { /* every second */
434	putc('.');
435	last = now;
436	}
437	}
438
439	DONE:
440	/* reset to read mode */
441	addr = (vu_char *) info->start[0];
442	addr[0] = 0xF0; /* reset bank */
443
444	printf(" done\n");
445	return 0;
446	}
447
448	/*-----------------------------------------------------------------------
449	* Copy memory to flash, returns:
450	* 0 - OK
451	* 1 - write timeout
452	* 2 - Flash not erased
453	*/
454
455	int write_buff(flash_info_t * info, uchar * src, ulong addr, ulong cnt)
456	{
457	int rc;
458
459	while (cnt > 0) {
460	if ((rc = write_byte(info, addr++, *src++)) != 0) {
461	return (rc);
462	}
463	--cnt;
464	}
465
466	return (0);
467	}
468
469	/*-----------------------------------------------------------------------
470	* Write a word to Flash, returns:
471	* 0 - OK
472	* 1 - write timeout
473	* 2 - Flash not erased
474	*/
475	static int write_byte(flash_info_t * info, ulong dest, uchar data)
476	{
477	vu_char addr = (vu_char ) (info->start[0]);
478	ulong start;
479	int flag;
480
481	/* Check if Flash is (sufficiently) erased */
482	if ((((vu_char ) dest) & data) != data) {
483	return (2);
484	}
485	/* Disable interrupts which might cause a timeout here */
486	flag = disable_interrupts();
487
488	addr[0x0555] = 0xAA;
489	addr[0x02AA] = 0x55;
490	addr[0x0555] = 0xA0;
491
492	((vu_char ) dest) = data;
493
494	/* re-enable interrupts if necessary */
495	if (flag)
496	enable_interrupts();
497
498	/* data polling for D7 */
499	start = get_timer(0);
500	while ((((vu_char ) dest) & 0x80) != (data & 0x80)) {
501	if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
502	return (1);
503	}
504	}
505	return (0);
506	}