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u-boot/board/cogent/flash.c
Wolfgang Denk 31a167cfa8 board/cogent/flash.c: Fix GCC 4.6 buiild warning 
Fix:
flash.c: In function 'flash_init':
flash.c:295:16: warning: variable 'fip' set but not used
[-Wunused-but-set-variable]

Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Murray Jensen <Murray.Jensen@csiro.au>
2011-11-07 22:47:48 +01:00

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/*
* (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
*/
#include <common.h>
#include <board/cogent/flash.h>
#include <linux/compiler.h>
flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
#if defined(CONFIG_ENV_IS_IN_FLASH)
# ifndef CONFIG_ENV_ADDR
# define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + CONFIG_ENV_OFFSET)
# endif
# ifndef CONFIG_ENV_SIZE
# define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE
# endif
# ifndef CONFIG_ENV_SECT_SIZE
# define CONFIG_ENV_SECT_SIZE CONFIG_ENV_SIZE
# endif
#endif
/*-----------------------------------------------------------------------
* Functions
*/
static int write_word (flash_info_t *info, ulong dest, ulong data);
/*-----------------------------------------------------------------------
*/
#if defined(CONFIG_CMA302)
/*
* probe for the existence of flash at address "addr"
* 0 = yes, 1 = bad Manufacturer's Id, 2 = bad Device Id
*/
static int
c302f_probe_word(c302f_addr_t addr)
{
/* reset the flash */
*addr = C302F_BNK_CMD_RST;
/* check the manufacturer id */
*addr = C302F_BNK_CMD_RD_ID;
if (*C302F_BNK_ADDR_MAN(addr) != C302F_BNK_RD_ID_MAN)
return 1;
/* check the device id */
*addr = C302F_BNK_CMD_RD_ID;
if (*C302F_BNK_ADDR_DEV(addr) != C302F_BNK_RD_ID_DEV)
return 2;
#ifdef FLASH_DEBUG
{
int i;
printf("\nMaster Lock Config = 0x%08lx\n",
*C302F_BNK_ADDR_CFGM(addr));
for (i = 0; i < C302F_BNK_NBLOCKS; i++)
printf("Block %2d Lock Config = 0x%08lx\n",
i, *C302F_BNK_ADDR_CFG(i, addr));
}
#endif
/* reset the flash again */
*addr = C302F_BNK_CMD_RST;
return 0;
}
/*
* probe for Cogent CMA302 flash module at address "base" and store
* info for any found into flash_info entry "fip". Must find at least
* one bank.
*/
static void
c302f_probe(flash_info_t *fip, c302f_addr_t base)
{
c302f_addr_t addr, eaddr;
int nbanks;
fip->size = 0L;
fip->sector_count = 0;
addr = base;
eaddr = C302F_BNK_ADDR_BASE(addr, C302F_MAX_BANKS);
nbanks = 0;
while (addr < eaddr) {
c302f_addr_t addrw, eaddrw, addrb;
int i, osc, nsc;
addrw = addr;
eaddrw = C302F_BNK_ADDR_NEXT_WORD(addrw);
while (addrw < eaddrw)
if (c302f_probe_word(addrw++) != 0)
goto out;
/* bank exists - append info for this bank to *fip */
fip->flash_id = FLASH_MAN_INTEL|FLASH_28F008S5;
fip->size += C302F_BNK_SIZE;
osc = fip->sector_count;
fip->sector_count += C302F_BNK_NBLOCKS;
if ((nsc = fip->sector_count) >= CONFIG_SYS_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 = C302F_BNK_ADDR_NEXT_BLK(addrb);
}
addr = C302F_BNK_ADDR_NEXT_BNK(addr);
nbanks++;
}
out:
if (nbanks == 0)
panic("ERROR: no flash found at address 0x%08lx\n",
(unsigned long)base);
}
static void
c302f_reset(flash_info_t *info, int sect)
{
c302f_addr_t addrw, eaddrw;
addrw = (c302f_addr_t)info->start[sect];
eaddrw = C302F_BNK_ADDR_NEXT_WORD(addrw);
while (addrw < eaddrw) {
#ifdef FLASH_DEBUG
printf(" writing reset cmd to addr 0x%08lx\n",
(unsigned long)addrw);
#endif
*addrw = C302F_BNK_CMD_RST;
addrw++;
}
}
static void
c302f_erase_init(flash_info_t *info, int sect)
{
c302f_addr_t addrw, saddrw, eaddrw;
int flag;
#ifdef FLASH_DEBUG
printf("0x%08lx C302F_BNK_CMD_PROG\n", C302F_BNK_CMD_PROG);
printf("0x%08lx C302F_BNK_CMD_ERASE1\n", C302F_BNK_CMD_ERASE1);
printf("0x%08lx C302F_BNK_CMD_ERASE2\n", C302F_BNK_CMD_ERASE2);
printf("0x%08lx C302F_BNK_CMD_CLR_STAT\n", C302F_BNK_CMD_CLR_STAT);
printf("0x%08lx C302F_BNK_CMD_RST\n", C302F_BNK_CMD_RST);
printf("0x%08lx C302F_BNK_STAT_RDY\n", C302F_BNK_STAT_RDY);
printf("0x%08lx C302F_BNK_STAT_ERR\n", C302F_BNK_STAT_ERR);
#endif
saddrw = (c302f_addr_t)info->start[sect];
eaddrw = C302F_BNK_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 = C302F_BNK_CMD_ERASE1;
*addrw = C302F_BNK_CMD_ERASE2;
}
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts();
}
static int
c302f_erase_poll(flash_info_t *info, int sect)
{
c302f_addr_t addrw, saddrw, eaddrw;
int sectdone, haderr;
saddrw = (c302f_addr_t)info->start[sect];
eaddrw = C302F_BNK_ADDR_NEXT_WORD(saddrw);
sectdone = 1;
haderr = 0;
for (addrw = saddrw; addrw < eaddrw; addrw++) {
c302f_word_t stat = *addrw;
#ifdef FLASH_DEBUG
printf(" checking status at addr "
"0x%08lx [0x%08lx]\n",
(unsigned long)addrw, stat);
#endif
if ((stat & C302F_BNK_STAT_RDY) != C302F_BNK_STAT_RDY)
sectdone = 0;
else if ((stat & C302F_BNK_STAT_ERR) != 0) {
printf(" failed on sector %d "
"(stat = 0x%08lx) at "
"address 0x%08lx\n",
sect, stat,
(unsigned long)addrw);
*addrw = C302F_BNK_CMD_CLR_STAT;
haderr = 1;
}
}
if (haderr)
return (-1);
else
return (sectdone);
}
static int
c302f_write_word(c302f_addr_t addr, c302f_word_t value)
{
c302f_word_t stat;
ulong start;
int flag, retval;
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
*addr = C302F_BNK_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) > CONFIG_SYS_FLASH_WRITE_TOUT) {
retval = 1;
goto done;
}
stat = *addr;
} while ((stat & C302F_BNK_STAT_RDY) != C302F_BNK_STAT_RDY);
if ((stat & C302F_BNK_STAT_ERR) != 0) {
printf("flash program failed (stat = 0x%08lx) "
"at address 0x%08lx\n", (ulong)stat, (ulong)addr);
*addr = C302F_BNK_CMD_CLR_STAT;
retval = 3;
}
done:
/* reset to read mode */
*addr = C302F_BNK_CMD_RST;
return (retval);
}
#endif /* CONFIG_CMA302 */
unsigned long
flash_init(void)
{
unsigned long total;
int i;
__maybe_unused flash_info_t *fip;
/* Init: no FLASHes known */
for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
flash_info[i].flash_id = FLASH_UNKNOWN;
}
fip = &flash_info[0];
total = 0L;
#if defined(CONFIG_CMA302)
c302f_probe(fip, (c302f_addr_t)CONFIG_SYS_FLASH_BASE);
total += fip->size;
fip++;
#endif
#if (CMA_MB_CAPS & CMA_MB_CAP_FLASH)
/* not yet ...
cmbf_probe(fip, (cmbf_addr_t)CMA_MB_FLASH_BASE);
total += fip->size;
fip++;
*/
#endif
/*
* protect monitor and environment sectors
*/
#if CONFIG_SYS_MONITOR_BASE == CONFIG_SYS_FLASH_BASE
flash_protect(FLAG_PROTECT_SET,
CONFIG_SYS_MONITOR_BASE,
CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
&flash_info[0]);
#endif
#ifdef CONFIG_ENV_IS_IN_FLASH
/* ENV protection ON by default */
flash_protect(FLAG_PROTECT_SET,
CONFIG_ENV_ADDR,
CONFIG_ENV_ADDR+CONFIG_ENV_SECT_SIZE-1,
&flash_info[0]);
#endif
return total;
}
/*-----------------------------------------------------------------------
*/
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_28F008S5: printf ("28F008S5\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 (" %2d - %08lX%s", i,
info->start[i],
info->protect[i] ? " (RO)" : " "
);
}
printf ("\n");
return;
}
/*-----------------------------------------------------------------------
*/
/*-----------------------------------------------------------------------
*/
/*
* The following code cannot be run from FLASH!
*/
int
flash_erase(flash_info_t *info, int s_first, int s_last)
{
int prot, sect, haderr;
ulong start, now, last;
void (*erase_init)(flash_info_t *, int);
int (*erase_poll)(flash_info_t *, int);
void (*reset)(flash_info_t *, int);
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;
}
switch (info->flash_id) {
#if defined(CONFIG_CMA302)
case FLASH_MAN_INTEL|FLASH_28F008S5:
erase_init = c302f_erase_init;
erase_poll = c302f_erase_poll;
reset = c302f_reset;
break;
#endif
#if (CMA_MB_CAPS & CMA_MB_CAP_FLASH)
case FLASH_MAN_INTEL|FLASH_28F800_B:
case FLASH_MAN_AMD|FLASH_AM29F800B:
/* not yet ...
erase_init = cmbf_erase_init;
erase_poll = cmbf_erase_poll;
reset = cmbf_reset;
break;
*/
#endif
default:
printf ("Flash type %08lx not supported - 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 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;
(*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 > CONFIG_SYS_FLASH_ERASE_TOUT) {
printf ("Timeout (sect %d)\n", sect);
haderr = 1;
break;
}
#ifndef FLASH_DEBUG
/* show that we're waiting */
if ((now - last) > 1000) { /* every second */
putc ('.');
last = now;
}
#endif
sectdone = (*erase_poll)(info, sect);
if (sectdone < 0) {
haderr = 1;
break;
}
} while (!sectdone);
if (haderr)
break;
}
}
if (haderr > 0) {
printf (" failed\n");
rcode = 1;
}
else
printf (" done\n");
/* reset to read mode */
for (sect = s_first; sect <= s_last; sect++) {
if (info->protect[sect] == 0) { /* not protected */
(*reset)(info, sect);
}
}
return rcode;
}
/*-----------------------------------------------------------------------
* Copy memory to flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
* 3 - write error
*/
int
write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt)
{
ulong cp, wp, data;
int i, l, rc;
ulong start, now, last;
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
*/
start = get_timer (0);
last = 0;
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;
/* show that we're waiting */
now = get_timer(start);
if ((now - last) > 1000) { /* every second */
putc ('.');
last = now;
}
}
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
* 3 - write error
*/
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);
}
switch (info->flash_id) {
#if defined(CONFIG_CMA302)
case FLASH_MAN_INTEL|FLASH_28F008S5:
retval = c302f_write_word((c302f_addr_t)dest, (c302f_word_t)data);
break;
#endif
#if (CMA_MB_CAPS & CMA_MB_CAP_FLASH)
case FLASH_MAN_INTEL|FLASH_28F800_B:
case FLASH_MAN_AMD|FLASH_AM29F800B:
/* not yet ...
retval = cmbf_write_word((cmbf_addr_t)dest, (cmbf_word_t)data);
*/
retval = 3;
break;
#endif
default:
printf ("Flash type %08lx not supported - aborted\n",
info->flash_id);
retval = 3;
break;
}
return (retval);
}
/*-----------------------------------------------------------------------
*/
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