upstream u-boot with additional patches for our devices/boards: https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ; Gbit ethernet patch for some LIME2 revisions ; with SPI flash support
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u-boot/board/hymod/flash.c

745 lines
16 KiB

/*
* (C) Copyright 2000
* 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
*
* Hacked for the Hymod board by Murray.Jensen@cmst.csiro.au, 20-Oct-00
*/
#include <common.h>
#include <mpc8260.h>
#include <board/hymod/flash.h>
flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
/*-----------------------------------------------------------------------
* Protection Flags:
*/
#define FLAG_PROTECT_SET 0x01
#define FLAG_PROTECT_CLEAR 0x02
/*-----------------------------------------------------------------------
* Functions
*/
#if 0
static ulong flash_get_size (vu_long *addr, flash_info_t *info);
static void flash_get_offsets (ulong base, flash_info_t *info);
#endif
static int write_word (flash_info_t *info, ulong dest, ulong data);
/*-----------------------------------------------------------------------
*/
/*
* probe for the existence of flash at bank word address "addr"
* 0 = yes, 1 = bad Manufacturer's Id, 2 = bad Device Id
*/
static int
bank_probe_word(bank_addr_t addr)
{
int retval;
/* reset the flash */
*addr = BANK_CMD_RST;
/* check the manufacturer id */
*addr = BANK_CMD_RD_ID;
if (*BANK_ADDR_REG_MAN(addr) != BANK_RD_ID_MAN) {
retval = -1;
goto out;
}
/* check the device id */
*addr = BANK_CMD_RD_ID;
if (*BANK_ADDR_REG_DEV(addr) != BANK_RD_ID_DEV) {
retval = -2;
goto out;
}
retval = CFG_FLASH_TYPE;
out:
/* reset the flash again */
*addr = BANK_CMD_RST;
return retval;
}
/*
* probe for flash banks at address "base" and store info for any found
* into flash_info entry "fip". Must find at least one bank.
*/
static void
bank_probe(flash_info_t *fip, bank_addr_t base)
{
bank_addr_t addr, eaddr;
int nbanks;
fip->flash_id = FLASH_UNKNOWN;
fip->size = 0L;
fip->sector_count = 0;
addr = base;
eaddr = BANK_ADDR_BASE(addr, MAX_BANKS);
nbanks = 0;
while (addr < eaddr) {
bank_addr_t addrw, eaddrw, addrb;
int i, osc, nsc, curtype = -1;
addrw = addr;
eaddrw = BANK_ADDR_NEXT_WORD(addrw);
while (addrw < eaddrw) {
int thistype;
#ifdef FLASH_DEBUG
printf(" probing for flash at addr 0x%08lx\n",
(unsigned long)addrw);
#endif
if ((thistype = bank_probe_word(addrw++)) < 0)
goto out;
if (curtype < 0)
curtype = thistype;
else {
if (thistype != curtype) {
printf("Differing flash type found!\n");
goto out;
}
}
}
if (curtype < 0)
goto out;
/* bank exists - append info for this bank to *fip */
fip->flash_id = FLASH_MAN_INTEL|curtype;
fip->size += BANK_SIZE;
osc = fip->sector_count;
fip->sector_count += BANK_NBLOCKS;
if ((nsc = fip->sector_count) >= CFG_MAX_FLASH_SECT)
panic("Too many sectors in flash at address 0x%08lx\n",
(unsigned long)base);
addrb = addr;
for (i = osc; i < nsc; i++) {
fip->start[i] = (ulong)addrb;
fip->protect[i] = 0;
addrb = BANK_ADDR_NEXT_BLK(addrb);
}
addr = BANK_ADDR_NEXT_BANK(addr);
nbanks++;
}
out:
if (nbanks == 0)
panic("ERROR: no flash found at address 0x%08lx\n",
(unsigned long)base);
}
static void
bank_reset(flash_info_t *info, int sect)
{
bank_addr_t addrw, eaddrw;
addrw = (bank_addr_t)info->start[sect];
eaddrw = BANK_ADDR_NEXT_WORD(addrw);
while (addrw < eaddrw) {
#ifdef FLASH_DEBUG
printf(" writing reset cmd to addr 0x%08lx\n",
(unsigned long)addrw);
#endif
*addrw = BANK_CMD_RST;
addrw++;
}
}
static void
bank_erase_init(flash_info_t *info, int sect)
{
bank_addr_t addrw, saddrw, eaddrw;
int flag;
#ifdef FLASH_DEBUG
printf("0x%08lx BANK_CMD_PROG\n", BANK_CMD_PROG);
printf("0x%08lx BANK_CMD_ERASE1\n", BANK_CMD_ERASE1);
printf("0x%08lx BANK_CMD_ERASE2\n", BANK_CMD_ERASE2);
printf("0x%08lx BANK_CMD_CLR_STAT\n", BANK_CMD_CLR_STAT);
printf("0x%08lx BANK_CMD_RST\n", BANK_CMD_RST);
printf("0x%08lx BANK_STAT_RDY\n", BANK_STAT_RDY);
printf("0x%08lx BANK_STAT_ERR\n", BANK_STAT_ERR);
#endif
saddrw = (bank_addr_t)info->start[sect];
eaddrw = BANK_ADDR_NEXT_WORD(saddrw);
#ifdef FLASH_DEBUG
printf("erasing sector %d, start addr = 0x%08lx "
"(bank next word addr = 0x%08lx)\n", sect,
(unsigned long)saddrw, (unsigned long)eaddrw);
#endif
/* Disable intrs which might cause a timeout here */
flag = disable_interrupts();
for (addrw = saddrw; addrw < eaddrw; addrw++) {
#ifdef FLASH_DEBUG
printf(" writing erase cmd to addr 0x%08lx\n",
(unsigned long)addrw);
#endif
*addrw = BANK_CMD_ERASE1;
*addrw = BANK_CMD_ERASE2;
}
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
}
static int
bank_erase_poll(flash_info_t *info, int sect)
{
bank_addr_t addrw, saddrw, eaddrw;
int sectdone, haderr;
saddrw = (bank_addr_t)info->start[sect];
eaddrw = BANK_ADDR_NEXT_WORD(saddrw);
sectdone = 1;
haderr = 0;
for (addrw = saddrw; addrw < eaddrw; addrw++) {
bank_word_t stat = *addrw;
#ifdef FLASH_DEBUG
printf(" checking status at addr "
"0x%08lx [0x%08lx]\n",
(unsigned long)addrw, stat);
#endif
if ((stat & BANK_STAT_RDY) != BANK_STAT_RDY)
sectdone = 0;
else if ((stat & BANK_STAT_ERR) != 0) {
printf(" failed on sector %d "
"(stat = 0x%08lx) at "
"address 0x%08lx\n",
sect, stat,
(unsigned long)addrw);
*addrw = BANK_CMD_CLR_STAT;
haderr = 1;
}
}
if (haderr)
return (-1);
else
return (sectdone);
}
static int
bank_write_word(bank_addr_t addr, bank_word_t value)
{
bank_word_t stat;
ulong start;
int flag, retval;
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
*addr = BANK_CMD_PROG;
*addr = value;
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
retval = 0;
/* data polling for D7 */
start = get_timer (0);
do {
if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
retval = 1;
goto done;
}
stat = *addr;
} while ((stat & BANK_STAT_RDY) != BANK_STAT_RDY);
if ((stat & BANK_STAT_ERR) != 0) {
printf("flash program failed (stat = 0x%08lx) "
"at address 0x%08lx\n", (ulong)stat, (ulong)addr);
*addr = BANK_CMD_CLR_STAT;
retval = 3;
}
done:
/* reset to read mode */
*addr = BANK_CMD_RST;
return (retval);
}
/*-----------------------------------------------------------------------
*/
unsigned long
flash_init(void)
{
int i;
/* Init: no FLASHes known */
for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
flash_info[i].flash_id = FLASH_UNKNOWN;
}
bank_probe(&flash_info[0], (bank_addr_t)CFG_FLASH_BASE);
/*
* protect monitor and environment sectors
*/
#if CFG_MONITOR_BASE == CFG_FLASH_BASE
(void)flash_protect(FLAG_PROTECT_SET,
CFG_MONITOR_BASE,
CFG_MONITOR_BASE+CFG_MONITOR_LEN-1,
&flash_info[0]);
#endif
#if defined(CFG_FLASH_ENV_ADDR)
(void)flash_protect(FLAG_PROTECT_SET,
CFG_FLASH_ENV_ADDR,
#if defined(CFG_FLASH_ENV_BUF)
CFG_FLASH_ENV_ADDR + CFG_FLASH_ENV_BUF - 1,
#else
CFG_FLASH_ENV_ADDR + CFG_FLASH_ENV_SIZE - 1,
#endif
&flash_info[0]);
#endif
return flash_info[0].size;
}
/*-----------------------------------------------------------------------
*/
#if 0
static void
flash_get_offsets(ulong base, flash_info_t *info)
{
int i;
/* set up sector start adress table */
if (info->flash_id & FLASH_BTYPE) {
/* set sector offsets for bottom boot block type */
info->start[0] = base + 0x00000000;
info->start[1] = base + 0x00008000;
info->start[2] = base + 0x0000C000;
info->start[3] = base + 0x00010000;
for (i = 4; i < info->sector_count; i++) {
info->start[i] = base + (i * 0x00020000) - 0x00060000;
}
} else {
/* set sector offsets for top boot block type */
i = info->sector_count - 1;
info->start[i--] = base + info->size - 0x00008000;
info->start[i--] = base + info->size - 0x0000C000;
info->start[i--] = base + info->size - 0x00010000;
for (; i >= 0; i--) {
info->start[i] = base + i * 0x00020000;
}
}
}
#endif /* 0 */
/*-----------------------------------------------------------------------
*/
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_INTEL: printf ("INTEL "); break;
default: printf ("Unknown Vendor "); break;
}
switch (info->flash_id & FLASH_TYPEMASK) {
case FLASH_28F320J5: printf ("28F320J5 (32 Mbit, 2 x 16bit)\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");
return;
}
/*-----------------------------------------------------------------------
*/
/*
* The following code cannot be run from FLASH!
*/
#if 0
static ulong
flash_get_size(vu_long *addr, flash_info_t *info)
{
short i;
ulong value;
ulong base = (ulong)addr;
/* Write auto select command: read Manufacturer ID */
addr[0x0555] = 0x00AA00AA;
addr[0x02AA] = 0x00550055;
addr[0x0555] = 0x00900090;
value = addr[0];
switch (value) {
case AMD_MANUFACT:
info->flash_id = FLASH_MAN_AMD;
break;
case FUJ_MANUFACT:
info->flash_id = FLASH_MAN_FUJ;
break;
default:
info->flash_id = FLASH_UNKNOWN;
info->sector_count = 0;
info->size = 0;
return (0); /* no or unknown flash */
}
value = addr[1]; /* device ID */
switch (value) {
case AMD_ID_LV400T:
info->flash_id += FLASH_AM400T;
info->sector_count = 11;
info->size = 0x00100000;
break; /* => 1 MB */
case AMD_ID_LV400B:
info->flash_id += FLASH_AM400B;
info->sector_count = 11;
info->size = 0x00100000;
break; /* => 1 MB */
case AMD_ID_LV800T:
info->flash_id += FLASH_AM800T;
info->sector_count = 19;
info->size = 0x00200000;
break; /* => 2 MB */
case AMD_ID_LV800B:
info->flash_id += FLASH_AM800B;
info->sector_count = 19;
info->size = 0x00200000;
break; /* => 2 MB */
case AMD_ID_LV160T:
info->flash_id += FLASH_AM160T;
info->sector_count = 35;
info->size = 0x00400000;
break; /* => 4 MB */
case AMD_ID_LV160B:
info->flash_id += FLASH_AM160B;
info->sector_count = 35;
info->size = 0x00400000;
break; /* => 4 MB */
#if 0 /* enable when device IDs are available */
case AMD_ID_LV320T:
info->flash_id += FLASH_AM320T;
info->sector_count = 67;
info->size = 0x00800000;
break; /* => 8 MB */
case AMD_ID_LV320B:
info->flash_id += FLASH_AM320B;
info->sector_count = 67;
info->size = 0x00800000;
break; /* => 8 MB */
#endif
default:
info->flash_id = FLASH_UNKNOWN;
return (0); /* => no or unknown flash */
}
/* set up sector start adress table */
if (info->flash_id & FLASH_BTYPE) {
/* set sector offsets for bottom boot block type */
info->start[0] = base + 0x00000000;
info->start[1] = base + 0x00008000;
info->start[2] = base + 0x0000C000;
info->start[3] = base + 0x00010000;
for (i = 4; i < info->sector_count; i++) {
info->start[i] = base + (i * 0x00020000) - 0x00060000;
}
} else {
/* set sector offsets for top boot block type */
i = info->sector_count - 1;
info->start[i--] = base + info->size - 0x00008000;
info->start[i--] = base + info->size - 0x0000C000;
info->start[i--] = base + info->size - 0x00010000;
for (; i >= 0; i--) {
info->start[i] = base + i * 0x00020000;
}
}
/* check for protected sectors */
for (i = 0; i < info->sector_count; i++) {
/* read sector protection at sector address, (A7 .. A0) = 0x02 */
/* D0 = 1 if protected */
addr = (volatile unsigned long *)(info->start[i]);
info->protect[i] = addr[2] & 1;
}
/*
* Prevent writes to uninitialized FLASH.
*/
if (info->flash_id != FLASH_UNKNOWN) {
addr = (volatile unsigned long *)info->start[0];
*addr = 0x00F000F0; /* reset bank */
}
return (info->size);
}
#endif /* 0 */
/*-----------------------------------------------------------------------
*/
int
flash_erase(flash_info_t *info, int s_first, int s_last)
{
int prot, sect, haderr;
ulong start, now, last;
int rcode = 0;
#ifdef FLASH_DEBUG
printf("\nflash_erase: erase %d sectors (%d to %d incl.) from\n"
" Bank # %d: ", s_last - s_first + 1, s_first, s_last,
(info - flash_info) + 1);
flash_print_info(info);
#endif
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;
}
prot = 0;
for (sect=s_first; sect<=s_last; ++sect) {
if (info->protect[sect]) {
prot++;
}
}
if (prot) {
printf("- Warning: %d protected sector%s will not be erased!\n",
prot, (prot > 1 ? "s" : ""));
}
start = get_timer (0);
last = 0;
haderr = 0;
for (sect = s_first; sect <= s_last; sect++) {
if (info->protect[sect] == 0) { /* not protected */
ulong estart;
int sectdone;
bank_erase_init(info, sect);
/* wait at least 80us - let's wait 1 ms */
udelay (1000);
estart = get_timer(start);
do {
now = get_timer(start);
if (now - estart > CFG_FLASH_ERASE_TOUT) {
printf ("Timeout (sect %d)\n", sect);
haderr = 1;
rcode = 1;
break;
}
#ifndef FLASH_DEBUG
/* show that we're waiting */
if ((now - last) > 1000) { /* every second */
putc ('.');
last = now;
}
#endif
sectdone = bank_erase_poll(info, sect);
if (sectdone < 0) {
haderr = 1;
rcode = 1;
break;
}
} while (!sectdone);
if (haderr)
break;
}
}
if (haderr > 0)
printf (" failed\n");
else
printf (" done\n");
/* reset to read mode */
for (sect = s_first; sect <= s_last; sect++) {
if (info->protect[sect] == 0) { /* not protected */
bank_reset(info, sect);
}
}
return rcode;
}
/*-----------------------------------------------------------------------
* 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)
{
ulong cp, wp, data;
int i, l, 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);
}
for (; i<4 && cnt>0; ++i) {
data = (data << 8) | *src++;
--cnt;
++cp;
}
for (; cnt==0 && i<4; ++i, ++cp) {
data = (data << 8) | (*(uchar *)cp);
}
if ((rc = write_word(info, wp, data)) != 0) {
return (rc);
}
wp += 4;
}
/*
* handle word aligned part
*/
while (cnt >= 4) {
data = 0;
for (i=0; i<4; ++i) {
data = (data << 8) | *src++;
}
if ((rc = write_word(info, wp, data)) != 0) {
return (rc);
}
wp += 4;
cnt -= 4;
}
if (cnt == 0) {
return (0);
}
/*
* handle unaligned tail bytes
*/
data = 0;
for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
data = (data << 8) | *src++;
--cnt;
}
for (; i<4; ++i, ++cp) {
data = (data << 8) | (*(uchar *)cp);
}
return (write_word(info, wp, data));
}
/*-----------------------------------------------------------------------
* Write a word to Flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
*/
static int
write_word(flash_info_t *info, ulong dest, ulong data)
{
int retval;
/* Check if Flash is (sufficiently) erased */
if ((*(ulong *)dest & data) != data) {
return (2);
}
retval = bank_write_word((bank_addr_t)dest, (bank_word_t)data);
return (retval);
}
/*-----------------------------------------------------------------------
*/