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

/*
 * (C) Copyright 2002
 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
 * Alex Zuepke <azu@sysgo.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>

ulong myflush(void);


#define FLASH_BANK_SIZE 0x400000	/* 4 MB */
#define MAIN_SECT_SIZE  0x20000		/* 128 KB */

flash_info_t    flash_info[CFG_MAX_FLASH_BANKS];


#define CMD_READ_ARRAY		0x00F000F0
#define CMD_UNLOCK1		0x00AA00AA
#define CMD_UNLOCK2		0x00550055
#define CMD_ERASE_SETUP		0x00800080
#define CMD_ERASE_CONFIRM	0x00300030
#define CMD_PROGRAM		0x00A000A0
#define CMD_UNLOCK_BYPASS	0x00200020

#define MEM_FLASH_ADDR1		(*(volatile u32 *)(CFG_FLASH_BASE + (0x00000555 << 2)))
#define MEM_FLASH_ADDR2		(*(volatile u32 *)(CFG_FLASH_BASE + (0x000002AA << 2)))

#define BIT_ERASE_DONE		0x00800080
#define BIT_RDY_MASK		0x00800080
#define BIT_PROGRAM_ERROR	0x00200020
#define BIT_TIMEOUT		0x80000000 /* our flag */

#define READY 1
#define ERR   2
#define TMO   4

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

ulong flash_init(void)
{
    int i, j;
    ulong size = 0;

    for (i = 0; i < CFG_MAX_FLASH_BANKS; i++)
    {
	ulong flashbase = 0;
	flash_info[i].flash_id =
	  (AMD_MANUFACT & FLASH_VENDMASK) |
	  (AMD_ID_LV160B & FLASH_TYPEMASK);
	flash_info[i].size = FLASH_BANK_SIZE;
	flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
	memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
	if (i == 0)
	  flashbase = PHYS_FLASH_1;
	else
	  panic("configured to many flash banks!\n");
	for (j = 0; j < flash_info[i].sector_count; j++)
	{

	    if (j <= 3)
	    {
		/* 1st one is 32 KB */
		if (j == 0)
		{
			flash_info[i].start[j] = flashbase + 0;
		}

		/* 2nd and 3rd are both 16 KB */
		if ((j == 1) || (j == 2))
		{
			flash_info[i].start[j] = flashbase + 0x8000 + (j-1)*0x4000;
		}

		/* 4th 64 KB */
		if (j == 3)
		{
			flash_info[i].start[j] = flashbase + 0x10000;
		}
	    }
	    else
	    {
		flash_info[i].start[j] = flashbase + (j - 3)*MAIN_SECT_SIZE;
	    }
	}
	size += flash_info[i].size;
    }

    /*
     * Protect monitor and environment sectors
     * Inferno is complicated, it's hardware locked
     */
#ifdef CONFIG_INFERNO
    /* first one, 0x00000 to 0x07fff */
    flash_protect(FLAG_PROTECT_SET,
		  CFG_FLASH_BASE + 0x00000,
		  CFG_FLASH_BASE + 0x08000 - 1,
		  &flash_info[0]);

    /* third to 10th, 0x0c000 - 0xdffff */
    flash_protect(FLAG_PROTECT_SET,
		  CFG_FLASH_BASE + 0x0c000,
		  CFG_FLASH_BASE + 0xe0000 - 1,
		  &flash_info[0]);
#else
    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]);
#endif
    return size;
}

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

    switch (info->flash_id & FLASH_VENDMASK)
    {
    case (AMD_MANUFACT & FLASH_VENDMASK):
	printf("AMD: ");
	break;
    default:
	printf("Unknown Vendor ");
	break;
    }

    switch (info->flash_id & FLASH_TYPEMASK)
    {
    case (AMD_ID_LV160B & FLASH_TYPEMASK):
	printf("2x Amd29F160BB (16Mbit)\n");
	break;
    default:
	printf("Unknown Chip Type\n");
	goto Done;
	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");

Done:
}

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

int	flash_erase (flash_info_t *info, int s_first, int s_last)
{
    ulong result;
    int iflag, cflag, prot, sect;
    int rc = ERR_OK;
    int chip1, chip2;

    /* first look for protection bits */

    if (info->flash_id == FLASH_UNKNOWN)
	return ERR_UNKNOWN_FLASH_TYPE;

    if ((s_first < 0) || (s_first > s_last)) {
	return ERR_INVAL;
    }

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

    prot = 0;
    for (sect=s_first; sect<=s_last; ++sect) {
	if (info->protect[sect]) {
	    prot++;
	}
    }
    if (prot)
	return ERR_PROTECTED;

    /*
     * 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.
     */
    cflag = icache_status();
    icache_disable();
    iflag = disable_interrupts();

    /* Start erase on unprotected sectors */
    for (sect = s_first; sect<=s_last && !ctrlc(); sect++)
    {
	printf("Erasing sector %2d ... ", sect);

	/* arm simple, non interrupt dependent timer */
	reset_timer_masked();

	if (info->protect[sect] == 0)
	{	/* not protected */
	    vu_long *addr = (vu_long *)(info->start[sect]);

	    MEM_FLASH_ADDR1 = CMD_UNLOCK1;
	    MEM_FLASH_ADDR2 = CMD_UNLOCK2;
	    MEM_FLASH_ADDR1 = CMD_ERASE_SETUP;

	    MEM_FLASH_ADDR1 = CMD_UNLOCK1;
	    MEM_FLASH_ADDR2 = CMD_UNLOCK2;
	    *addr = CMD_ERASE_CONFIRM;

	    /* wait until flash is ready */
	    chip1 = chip2 = 0;

	    do
	    {
		result = *addr;

		/* check timeout */
		if (get_timer_masked() > CFG_FLASH_ERASE_TOUT)
		{
		    MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
		    chip1 = TMO;
		    break;
		}

		if (!chip1 && (result & 0xFFFF) & BIT_ERASE_DONE)
			chip1 = READY;

		if (!chip1 && (result & 0xFFFF) & BIT_PROGRAM_ERROR)
			chip1 = ERR;

		if (!chip2 && (result >> 16) & BIT_ERASE_DONE)
			chip2 = READY;

		if (!chip2 && (result >> 16) & BIT_PROGRAM_ERROR)
			chip2 = ERR;

	    }  while (!chip1 || !chip2);

	    MEM_FLASH_ADDR1 = CMD_READ_ARRAY;

	    if (chip1 == ERR || chip2 == ERR)
	    {
		rc = ERR_PROG_ERROR;
		goto outahere;
	    }
	    if (chip1 == TMO)
	    {
		rc = ERR_TIMOUT;
		goto outahere;
	    }

	    printf("ok.\n");
	}
	else /* it was protected */
	{
	    printf("protected!\n");
	}
    }

    if (ctrlc())
      printf("User Interrupt!\n");

outahere:
    /* allow flash to settle - wait 10 ms */
    udelay_masked(10000);

    if (iflag)
      enable_interrupts();

    if (cflag)
      icache_enable();

    return rc;
}

/*-----------------------------------------------------------------------
 * Copy memory to flash
 */

volatile static int write_word (flash_info_t *info, ulong dest, ulong data)
{
    vu_long *addr = (vu_long *)dest;
    ulong result;
    int rc = ERR_OK;
    int cflag, iflag;
    int chip1, chip2;

    /*
     * Check if Flash is (sufficiently) erased
     */
    result = *addr;
    if ((result & 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.
     */
    cflag = icache_status();
    icache_disable();
    iflag = disable_interrupts();

    MEM_FLASH_ADDR1 = CMD_UNLOCK1;
    MEM_FLASH_ADDR2 = CMD_UNLOCK2;
    MEM_FLASH_ADDR1 = CMD_UNLOCK_BYPASS;
    *addr = CMD_PROGRAM;
    *addr = data;

    /* arm simple, non interrupt dependent timer */
    reset_timer_masked();

    /* wait until flash is ready */
    chip1 = chip2 = 0;
    do
    {
	result = *addr;

	/* check timeout */
	if (get_timer_masked() > CFG_FLASH_ERASE_TOUT)
	{
	    chip1 = ERR | TMO;
	    break;
	}
	if (!chip1 && ((result & 0x80) == (data & 0x80)))
		chip1 = READY;

	if (!chip1 && ((result & 0xFFFF) & BIT_PROGRAM_ERROR))
	{
		result = *addr;

		if ((result & 0x80) == (data & 0x80))
			chip1 = READY;
		else
			chip1 = ERR;
	}

	if (!chip2 && ((result & (0x80 << 16)) == (data & (0x80 << 16))))
		chip2 = READY;

	if (!chip2 && ((result >> 16) & BIT_PROGRAM_ERROR))
	{
		result = *addr;

		if ((result & (0x80 << 16)) == (data & (0x80 << 16)))
			chip2 = READY;
		else
			chip2 = ERR;
	}

    }  while (!chip1 || !chip2);

    *addr = CMD_READ_ARRAY;

    if (chip1 == ERR || chip2 == ERR || *addr != data)
	rc = ERR_PROG_ERROR;

    if (iflag)
      enable_interrupts();

    if (cflag)
      icache_enable();

    return rc;
}

/*-----------------------------------------------------------------------
 * Copy memory to flash.
 */

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

    wp = (addr & ~3);	/* 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 << 24);
	}
	for (; i<4 && cnt>0; ++i) {
	    data = (data >> 8) | (*src++ << 24);
	    --cnt;
	    ++cp;
	}
	for (; cnt==0 && i<4; ++i, ++cp) {
	    data = (data >> 8) | (*(uchar *)cp << 24);
	}

	if ((rc = write_word(info, wp, data)) != 0) {
	    return (rc);
	}
	wp += 4;
    }

    /*
     * handle word aligned part
     */
    while (cnt >= 4) {
	data = *((vu_long*)src);
	if ((rc = write_word(info, wp, data)) != 0) {
	    return (rc);
	}
	src += 4;
	wp  += 4;
	cnt -= 4;
    }

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

    /*
     * handle unaligned tail bytes
     */
    data = 0;
    for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
	data = (data >> 8) | (*src++ << 24);
	--cnt;
    }
    for (; i<4; ++i, ++cp) {
	data = (data >> 8) | (*(uchar *)cp << 24);
    }

    return write_word(info, wp, data);
}
Commit	Line	Data
ea8015b8 WD	1	/*
	2	* (C) Copyright 2002
	3	* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
	4	* Alex Zuepke <azu@sysgo.de>
	5	*
	6	* See file CREDITS for list of people who contributed to this
	7	* project.
	8	*
	9	* This program is free software; you can redistribute it and/or
	10	* modify it under the terms of the GNU General Public License as
	11	* published by the Free Software Foundation; either version 2 of
	12	* the License, or (at your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	22	* MA 02111-1307 USA
	23	*/
	24
	25	#include <common.h>
	26
	27	ulong myflush(void);
	28
	29
	30	#define FLASH_BANK_SIZE 0x400000 /* 4 MB */
	31	#define MAIN_SECT_SIZE 0x20000 /* 128 KB */
	32
	33	flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
	34
	35
	36	#define CMD_READ_ARRAY 0x00F000F0
	37	#define CMD_UNLOCK1 0x00AA00AA
	38	#define CMD_UNLOCK2 0x00550055
	39	#define CMD_ERASE_SETUP 0x00800080
	40	#define CMD_ERASE_CONFIRM 0x00300030
	41	#define CMD_PROGRAM 0x00A000A0
	42	#define CMD_UNLOCK_BYPASS 0x00200020
	43
	44	#define MEM_FLASH_ADDR1 ((volatile u32 )(CFG_FLASH_BASE + (0x00000555 << 2)))
	45	#define MEM_FLASH_ADDR2 ((volatile u32 )(CFG_FLASH_BASE + (0x000002AA << 2)))
	46
	47	#define BIT_ERASE_DONE 0x00800080
	48	#define BIT_RDY_MASK 0x00800080
	49	#define BIT_PROGRAM_ERROR 0x00200020
	50	#define BIT_TIMEOUT 0x80000000 /* our flag */
	51
	52	#define READY 1
	53	#define ERR 2
	54	#define TMO 4
	55
	56	/*-----------------------------------------------------------------------
	57	*/
	58
	59	ulong flash_init(void)
	60	{
	61	int i, j;
	62	ulong size = 0;
	63
	64	for (i = 0; i < CFG_MAX_FLASH_BANKS; i++)
65	{
66	ulong flashbase = 0;
67	flash_info[i].flash_id =
68	(AMD_MANUFACT & FLASH_VENDMASK) \|
69	(AMD_ID_LV160B & FLASH_TYPEMASK);
70	flash_info[i].size = FLASH_BANK_SIZE;
71	flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
72	memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);
73	if (i == 0)
74	flashbase = PHYS_FLASH_1;
75	else
76	panic("configured to many flash banks!\n");
77	for (j = 0; j < flash_info[i].sector_count; j++)
78	{
79
80	if (j <= 3)
81	{
82	/* 1st one is 32 KB */
83	if (j == 0)
84	{
85	flash_info[i].start[j] = flashbase + 0;
86	}
87
88	/* 2nd and 3rd are both 16 KB */
89	if ((j == 1) \|\| (j == 2))
90	{
91	flash_info[i].start[j] = flashbase + 0x8000 + (j-1)*0x4000;
92	}
93
94	/* 4th 64 KB */
95	if (j == 3)
96	{
97	flash_info[i].start[j] = flashbase + 0x10000;
98	}
99	}
100	else
101	{
102	flash_info[i].start[j] = flashbase + (j - 3)*MAIN_SECT_SIZE;
103	}
104	}
105	size += flash_info[i].size;
106	}
107
108	/*
109	* Protect monitor and environment sectors
110	* Inferno is complicated, it's hardware locked
111	*/
112	#ifdef CONFIG_INFERNO
113	/* first one, 0x00000 to 0x07fff */
114	flash_protect(FLAG_PROTECT_SET,
115	CFG_FLASH_BASE + 0x00000,
116	CFG_FLASH_BASE + 0x08000 - 1,
117	&flash_info[0]);
118
119	/* third to 10th, 0x0c000 - 0xdffff */
120	flash_protect(FLAG_PROTECT_SET,
121	CFG_FLASH_BASE + 0x0c000,
122	CFG_FLASH_BASE + 0xe0000 - 1,
123	&flash_info[0]);
124	#else
125	flash_protect(FLAG_PROTECT_SET,
126	CFG_FLASH_BASE,
3b57fe0a	127	CFG_FLASH_BASE + monitor_flash_len - 1,
ea8015b8 WD	128	&flash_info[0]);
	129
	130	flash_protect(FLAG_PROTECT_SET,
	131	CFG_ENV_ADDR,
	132	CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
	133	&flash_info[0]);
	134	#endif
	135	return size;
	136	}
	137
	138	/*-----------------------------------------------------------------------
	139	*/
	140	void flash_print_info (flash_info_t *info)
	141	{
	142	int i;
	143
	144	switch (info->flash_id & FLASH_VENDMASK)
	145	{
	146	case (AMD_MANUFACT & FLASH_VENDMASK):
	147	printf("AMD: ");
	148	break;
	149	default:
	150	printf("Unknown Vendor ");
	151	break;
	152	}
	153
	154	switch (info->flash_id & FLASH_TYPEMASK)
	155	{
	156	case (AMD_ID_LV160B & FLASH_TYPEMASK):
	157	printf("2x Amd29F160BB (16Mbit)\n");
	158	break;
	159	default:
	160	printf("Unknown Chip Type\n");
	161	goto Done;
	162	break;
	163	}
	164
	165	printf(" Size: %ld MB in %d Sectors\n",
	166	info->size >> 20, info->sector_count);
	167
	168	printf(" Sector Start Addresses:");
	169	for (i = 0; i < info->sector_count; i++)
	170	{
	171	if ((i % 5) == 0)
	172	{
	173	printf ("\n ");
	174	}
	175	printf (" %08lX%s", info->start[i],
	176	info->protect[i] ? " (RO)" : " ");
	177	}
	178	printf ("\n");
	179
	180	Done:
	181	}
	182
	183	/*-----------------------------------------------------------------------
	184	*/
	185
	186	int flash_erase (flash_info_t *info, int s_first, int s_last)
	187	{
	188	ulong result;
	189	int iflag, cflag, prot, sect;
	190	int rc = ERR_OK;
	191	int chip1, chip2;
192
193	/* first look for protection bits */
194
195	if (info->flash_id == FLASH_UNKNOWN)
196	return ERR_UNKNOWN_FLASH_TYPE;
197
198	if ((s_first < 0) \|\| (s_first > s_last)) {
199	return ERR_INVAL;
200	}
201
202	if ((info->flash_id & FLASH_VENDMASK) !=
203	(AMD_MANUFACT & FLASH_VENDMASK)) {
204	return ERR_UNKNOWN_FLASH_VENDOR;
205	}
206
207	prot = 0;
208	for (sect=s_first; sect<=s_last; ++sect) {
209	if (info->protect[sect]) {
210	prot++;
211	}
212	}
213	if (prot)
214	return ERR_PROTECTED;
215
216	/*
217	* Disable interrupts which might cause a timeout
218	* here. Remember that our exception vectors are
219	* at address 0 in the flash, and we don't want a
220	* (ticker) exception to happen while the flash
221	* chip is in programming mode.
222	*/
223	cflag = icache_status();
224	icache_disable();
225	iflag = disable_interrupts();
226
227	/* Start erase on unprotected sectors */
228	for (sect = s_first; sect<=s_last && !ctrlc(); sect++)
229	{
230	printf("Erasing sector %2d ... ", sect);
231
232	/* arm simple, non interrupt dependent timer */
233	reset_timer_masked();
234
235	if (info->protect[sect] == 0)
236	{ /* not protected */
237	vu_long addr = (vu_long )(info->start[sect]);
238
239	MEM_FLASH_ADDR1 = CMD_UNLOCK1;
240	MEM_FLASH_ADDR2 = CMD_UNLOCK2;
241	MEM_FLASH_ADDR1 = CMD_ERASE_SETUP;
242
243	MEM_FLASH_ADDR1 = CMD_UNLOCK1;
244	MEM_FLASH_ADDR2 = CMD_UNLOCK2;
245	*addr = CMD_ERASE_CONFIRM;
246
247	/* wait until flash is ready */
248	chip1 = chip2 = 0;
249
250	do
251	{
252	result = *addr;
253
254	/* check timeout */
255	if (get_timer_masked() > CFG_FLASH_ERASE_TOUT)
256	{
257	MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
258	chip1 = TMO;
259	break;
260	}
261
262	if (!chip1 && (result & 0xFFFF) & BIT_ERASE_DONE)
263	chip1 = READY;
264
265	if (!chip1 && (result & 0xFFFF) & BIT_PROGRAM_ERROR)
266	chip1 = ERR;
267
268	if (!chip2 && (result >> 16) & BIT_ERASE_DONE)
269	chip2 = READY;
270
271	if (!chip2 && (result >> 16) & BIT_PROGRAM_ERROR)
272	chip2 = ERR;
273
274	} while (!chip1 \|\| !chip2);
275
276	MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
277
278	if (chip1 == ERR \|\| chip2 == ERR)
279	{
280	rc = ERR_PROG_ERROR;
281	goto outahere;
282	}
283	if (chip1 == TMO)
284	{
285	rc = ERR_TIMOUT;
286	goto outahere;
287	}
288
289	printf("ok.\n");
290	}
291	else /* it was protected */
292	{
293	printf("protected!\n");
294	}
295	}
296
297	if (ctrlc())
298	printf("User Interrupt!\n");
299
300	outahere:
301	/* allow flash to settle - wait 10 ms */
302	udelay_masked(10000);
303
304	if (iflag)
305	enable_interrupts();
306
307	if (cflag)
308	icache_enable();
309
310	return rc;
311	}
312
313	/*-----------------------------------------------------------------------
314	* Copy memory to flash
315	*/
316
317	volatile static int write_word (flash_info_t *info, ulong dest, ulong data)
318	{
319	vu_long addr = (vu_long )dest;
320	ulong result;
321	int rc = ERR_OK;
322	int cflag, iflag;
323	int chip1, chip2;
324
325	/*
326	* Check if Flash is (sufficiently) erased
327	*/
328	result = *addr;
329	if ((result & data) != data)
8bde7f77	330	return ERR_NOT_ERASED;
ea8015b8 WD	331
	332
	333	/*
	334	* Disable interrupts which might cause a timeout
	335	* here. Remember that our exception vectors are
	336	* at address 0 in the flash, and we don't want a
	337	* (ticker) exception to happen while the flash
	338	* chip is in programming mode.
	339	*/
	340	cflag = icache_status();
	341	icache_disable();
	342	iflag = disable_interrupts();
	343
	344	MEM_FLASH_ADDR1 = CMD_UNLOCK1;
	345	MEM_FLASH_ADDR2 = CMD_UNLOCK2;
	346	MEM_FLASH_ADDR1 = CMD_UNLOCK_BYPASS;
	347	*addr = CMD_PROGRAM;
	348	*addr = data;
	349
	350	/* arm simple, non interrupt dependent timer */
	351	reset_timer_masked();
	352
	353	/* wait until flash is ready */
	354	chip1 = chip2 = 0;
	355	do
	356	{
	357	result = *addr;
	358
	359	/* check timeout */
	360	if (get_timer_masked() > CFG_FLASH_ERASE_TOUT)
	361	{
	362	chip1 = ERR \| TMO;
	363	break;
	364	}
	365	if (!chip1 && ((result & 0x80) == (data & 0x80)))
	366	chip1 = READY;
	367
	368	if (!chip1 && ((result & 0xFFFF) & BIT_PROGRAM_ERROR))
	369	{
	370	result = *addr;
	371
	372	if ((result & 0x80) == (data & 0x80))
	373	chip1 = READY;
	374	else
	375	chip1 = ERR;
	376	}
	377
	378	if (!chip2 && ((result & (0x80 << 16)) == (data & (0x80 << 16))))
	379	chip2 = READY;
	380
	381	if (!chip2 && ((result >> 16) & BIT_PROGRAM_ERROR))
	382	{
	383	result = *addr;
	384
	385	if ((result & (0x80 << 16)) == (data & (0x80 << 16)))
	386	chip2 = READY;
	387	else
	388	chip2 = ERR;
	389	}
	390
	391	} while (!chip1 \|\| !chip2);
	392
	393	*addr = CMD_READ_ARRAY;
	394
395	if (chip1 == ERR \|\| chip2 == ERR \|\| *addr != data)
8bde7f77	396	rc = ERR_PROG_ERROR;
ea8015b8 WD	397
	398	if (iflag)
	399	enable_interrupts();
	400
	401	if (cflag)
	402	icache_enable();
	403
	404	return rc;
	405	}
	406
	407	/*-----------------------------------------------------------------------
	408	* Copy memory to flash.
	409	*/
	410
	411	int write_buff (flash_info_t info, uchar src, ulong addr, ulong cnt)
	412	{
	413	ulong cp, wp, data;
	414	int l;
	415	int i, rc;
	416
	417	wp = (addr & ~3); /* get lower word aligned address */
	418
	419	/*
	420	* handle unaligned start bytes
	421	*/
	422	if ((l = addr - wp) != 0) {
	423	data = 0;
	424	for (i=0, cp=wp; i<l; ++i, ++cp) {
	425	data = (data >> 8) \| ((uchar )cp << 24);
	426	}
	427	for (; i<4 && cnt>0; ++i) {
	428	data = (data >> 8) \| (*src++ << 24);
	429	--cnt;
	430	++cp;
	431	}
	432	for (; cnt==0 && i<4; ++i, ++cp) {
	433	data = (data >> 8) \| ((uchar )cp << 24);
	434	}
	435
	436	if ((rc = write_word(info, wp, data)) != 0) {
	437	return (rc);
	438	}
	439	wp += 4;
	440	}
	441
	442	/*
	443	* handle word aligned part
	444	*/
	445	while (cnt >= 4) {
	446	data = ((vu_long)src);
	447	if ((rc = write_word(info, wp, data)) != 0) {
	448	return (rc);
	449	}
	450	src += 4;
	451	wp += 4;
	452	cnt -= 4;
	453	}
	454
	455	if (cnt == 0) {
	456	return ERR_OK;
	457	}
	458
	459	/*
	460	* handle unaligned tail bytes
461	*/
462	data = 0;
463	for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
464	data = (data >> 8) \| (*src++ << 24);
465	--cnt;
466	}
467	for (; i<4; ++i, ++cp) {
468	data = (data >> 8) \| ((uchar )cp << 24);
469	}
470
471	return write_word(info, wp, data);
472	}