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uboot-1.1.4-kirkwood/board/Marvell/common/flash.c

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u-boot 1.1.4
2024-01-07 23:57:24 +01:00
/*
* (C) Copyright 2001
* Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
*
* 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
*/
/*
* flash.c - flash support for the 512k, 8bit boot flash
and the 8MB 32bit extra flash on the DB64360
* most of this file was based on the existing U-Boot
* flash drivers.
*
* written or collected and sometimes rewritten by
* Ingo Assmus <ingo.assmus@keymile.com>
*
*/
#include <common.h>
#include <mpc8xx.h>
#include "../include/mv_gen_reg.h"
#include "../include/memory.h"
#include "intel_flash.h"
#define FLASH_ROM 0xFFFD /* unknown flash type */
#define FLASH_RAM 0xFFFE /* unknown flash type */
#define FLASH_MAN_UNKNOWN 0xFFFF0000
/* #define DEBUG */
/* Intel flash commands */
int flash_erase_intel (flash_info_t * info, int s_first, int s_last);
int write_word_intel (bank_addr_t addr, bank_word_t value);
flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */
/*-----------------------------------------------------------------------
* Functions
*/
static ulong flash_get_size (int portwidth, vu_long * addr,
flash_info_t * info);
static int write_word (flash_info_t * info, ulong dest, ulong data);
static void flash_get_offsets (ulong base, flash_info_t * info);
/*-----------------------------------------------------------------------
*/
unsigned long flash_init (void)
{
unsigned int i;
unsigned long size_b0 = 0, size_b1 = 0;
unsigned long base, flash_size;
/* Init: no FLASHes known */
for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
flash_info[i].flash_id = FLASH_UNKNOWN;
}
/* the boot flash */
base = CFG_FLASH_BASE;
size_b0 =
flash_get_size (CFG_BOOT_FLASH_WIDTH, (vu_long *) base,
&flash_info[0]);
printf ("[%ldkB@%lx] ", size_b0 / 1024, base);
if (flash_info[0].flash_id == FLASH_UNKNOWN) {
printf ("## Unknown FLASH at %08lx: Size = 0x%08lx = %ld MB\n", base, size_b0, size_b0 << 20);
}
base = memoryGetDeviceBaseAddress (CFG_EXTRA_FLASH_DEVICE);
/* base = memoryGetDeviceBaseAddress(DEV_CS3_BASE_ADDR);*/
for (i = 1; i < CFG_MAX_FLASH_BANKS; i++) {
unsigned long size =
flash_get_size (CFG_EXTRA_FLASH_WIDTH,
(vu_long *) base, &flash_info[i]);
printf ("[%ldMB@%lx] ", size >> 20, base);
if (flash_info[i].flash_id == FLASH_UNKNOWN) {
if (i == 1) {
printf ("## Unknown FLASH at %08lx: Size = 0x%08lx = %ld MB\n", base, size_b1, size_b1 << 20);
}
break;
}
size_b1 += size;
base += size;
}
flash_size = size_b0 + size_b1;
return flash_size;
}
/*-----------------------------------------------------------------------
*/
static void flash_get_offsets (ulong base, flash_info_t * info)
{
int i;
int sector_size;
if (!info->sector_count)
return;
/* set up sector start address table */
switch (info->flash_id & FLASH_TYPEMASK) {
case FLASH_AM040:
case FLASH_28F128J3A:
case FLASH_28F640J3A:
case FLASH_RAM:
/* this chip has uniformly spaced sectors */
sector_size = info->size / info->sector_count;
for (i = 0; i < info->sector_count; i++)
info->start[i] = base + (i * sector_size);
break;
default:
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;
}
}
}
}
/*-----------------------------------------------------------------------
*/
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_STM:
printf ("STM ");
break;
case FLASH_MAN_AMD:
printf ("AMD ");
break;
case FLASH_MAN_FUJ:
printf ("FUJITSU ");
break;
case FLASH_MAN_INTEL:
printf ("INTEL ");
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;
case FLASH_28F640J3A:
printf ("28F640J3A (64 Mbit)\n");
break;
case FLASH_28F128J3A:
printf ("28F128J3A (128 Mbit)\n");
break;
case FLASH_ROM:
printf ("ROM\n");
break;
case FLASH_RAM:
printf ("RAM\n");
break;
default:
printf ("Unknown Chip Type\n");
break;
}
if ((info->size >> 20) > 0) {
printf (" Size: %ld MB in %d Sectors\n",
info->size >> 20, info->sector_count);
} else {
printf (" Size: %ld kB in %d Sectors\n",
info->size >> 10, 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!
*/
static inline void flash_cmd (int width, volatile unsigned char *addr,
int offset, unsigned char cmd)
{
/* supports 1x8, 1x16, and 2x16 */
/* 2x8 and 4x8 are not supported */
if (width == 4) {
/* assuming chips are in 16 bit mode */
/* 2x16 */
unsigned long cmd32 = (cmd << 16) | cmd;
*(volatile unsigned long *) (addr + offset * 2) = cmd32;
} else {
/* 1x16 or 1x8 */
*(volatile unsigned char *) (addr + offset) = cmd;
}
}
static ulong
flash_get_size (int portwidth, vu_long * addr, flash_info_t * info)
{
short i;
volatile unsigned char *caddr = (unsigned char *) addr;
volatile unsigned short *saddr = (unsigned short *) addr;
volatile unsigned long *laddr = (unsigned long *) addr;
char old[2], save;
ulong id = 0, manu = 0, base = (ulong) addr;
#ifdef DEBUG
printf ("%s: enter\n", __FUNCTION__);
#endif
info->portwidth = portwidth;
save = *caddr;
flash_cmd (portwidth, caddr, 0, 0xf0);
flash_cmd (portwidth, caddr, 0, 0xf0);
udelay (10);
old[0] = caddr[0];
old[1] = caddr[1];
if (old[0] != 0xf0) {
flash_cmd (portwidth, caddr, 0, 0xf0);
flash_cmd (portwidth, caddr, 0, 0xf0);
udelay (10);
if (*caddr == 0xf0) {
/* this area is ROM */
*caddr = save;
info->flash_id = FLASH_ROM + FLASH_MAN_UNKNOWN;
info->sector_count = 8;
info->size = 0x80000;
flash_get_offsets (base, info);
return info->size;
}
} else {
*caddr = 0;
udelay (10);
if (*caddr == 0) {
/* this area is RAM */
*caddr = save;
info->flash_id = FLASH_RAM + FLASH_MAN_UNKNOWN;
info->sector_count = 8;
info->size = 0x80000;
flash_get_offsets (base, info);
return info->size;
}
flash_cmd (portwidth, caddr, 0, 0xf0);
udelay (10);
}
/* Write auto select command: read Manufacturer ID */
flash_cmd (portwidth, caddr, 0x555, 0xAA);
flash_cmd (portwidth, caddr, 0x2AA, 0x55);
flash_cmd (portwidth, caddr, 0x555, 0x90);
udelay (10);
if ((caddr[0] == old[0]) && (caddr[1] == old[1])) {
/* this area is ROM */
info->flash_id = FLASH_ROM + FLASH_MAN_UNKNOWN;
info->sector_count = 8;
info->size = 0x80000;
flash_get_offsets (base, info);
return info->size;
#ifdef DEBUG
} else {
printf ("%px%d: %02x:%02x -> %02x:%02x\n",
caddr, portwidth, old[0], old[1], caddr[0], caddr[1]);
#endif
}
switch (portwidth) {
case 1:
manu = caddr[0];
manu |= manu << 16;
id = caddr[1];
break;
case 2:
manu = saddr[0];
manu |= manu << 16;
id = saddr[1];
id |= id << 16;
break;
case 4:
manu = laddr[0];
id = laddr[1];
break;
}
#ifdef DEBUG
flash_cmd (portwidth, caddr, 0, 0xf0);
printf ("\n%08lx:%08lx:%08lx\n", base, manu, id);
printf ("%08lx %08lx %08lx %08lx\n",
laddr[0], laddr[1], laddr[2], laddr[3]);
#endif
switch (manu) {
case STM_MANUFACT:
info->flash_id = FLASH_MAN_STM;
break;
case AMD_MANUFACT:
info->flash_id = FLASH_MAN_AMD;
break;
case FUJ_MANUFACT:
info->flash_id = FLASH_MAN_FUJ;
break;
case INTEL_MANUFACT:
info->flash_id = FLASH_MAN_INTEL;
break;
default:
flash_cmd (portwidth, caddr, 0, 0xf0);
printf ("Unknown Mfr [%08lx]:%08lx\n", manu, id);
info->flash_id = FLASH_UNKNOWN;
info->sector_count = 0;
info->size = 0;
return (0); /* no or unknown flash */
}
switch (id) {
case AMD_ID_LV400T:
info->flash_id += FLASH_AM400T;
info->sector_count = 11;
info->size = 0x00100000;
info->chipwidth = 1;
break; /* => 1 MB */
case AMD_ID_LV400B:
info->flash_id += FLASH_AM400B;
info->sector_count = 11;
info->size = 0x00100000;
info->chipwidth = 1;
break; /* => 1 MB */
case AMD_ID_LV800T:
info->flash_id += FLASH_AM800T;
info->sector_count = 19;
info->size = 0x00200000;
info->chipwidth = 1;
break; /* => 2 MB */
case AMD_ID_LV800B:
info->flash_id += FLASH_AM800B;
info->sector_count = 19;
info->size = 0x00200000;
info->chipwidth = 1;
break; /* => 2 MB */
case AMD_ID_LV160T:
info->flash_id += FLASH_AM160T;
info->sector_count = 35;
info->size = 0x00400000;
info->chipwidth = 1;
break; /* => 4 MB */
case AMD_ID_LV160B:
info->flash_id += FLASH_AM160B;
info->sector_count = 35;
info->size = 0x00400000;
info->chipwidth = 1;
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
case AMD_ID_LV040B:
info->flash_id += FLASH_AM040;
info->sector_count = 8;
info->size = 0x80000;
info->chipwidth = 1;
break; /* => 512 kB */
case INTEL_ID_28F640J3A:
info->flash_id += FLASH_28F640J3A;
info->sector_count = 64;
info->size = 128 * 1024 * 64; /* 128kbytes x 64 blocks */
info->chipwidth = 2;
if (portwidth == 4)
info->size *= 2; /* 2x16 */
break;
case INTEL_ID_28F128J3A:
info->flash_id += FLASH_28F128J3A;
info->sector_count = 128;
info->size = 128 * 1024 * 128; /* 128kbytes x 128 blocks */
info->chipwidth = 2;
if (portwidth == 4)
info->size *= 2; /* 2x16 */
break;
default:
flash_cmd (portwidth, caddr, 0, 0xf0);
printf ("Unknown id %lx:[%lx]\n", manu, id);
info->flash_id = FLASH_UNKNOWN;
info->chipwidth = 1;
return (0); /* => no or unknown flash */
}
flash_get_offsets (base, info);
/* 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 */
caddr = (volatile unsigned char *) (info->start[i]);
saddr = (volatile unsigned short *) (info->start[i]);
laddr = (volatile unsigned long *) (info->start[i]);
if (portwidth == 1)
info->protect[i] = caddr[2] & 1;
else if (portwidth == 2)
info->protect[i] = saddr[2] & 1;
else
info->protect[i] = laddr[2] & 1;
}
/*
* Prevent writes to uninitialized FLASH.
*/
if (info->flash_id != FLASH_UNKNOWN) {
caddr = (volatile unsigned char *) info->start[0];
flash_cmd (portwidth, caddr, 0, 0xF0); /* reset bank */
}
return (info->size);
}
int flash_erase (flash_info_t * info, int s_first, int s_last)
{
volatile unsigned char *addr = (uchar *) (info->start[0]);
int flag, prot, sect, l_sect;
ulong start, now, last;
/* modified to support 2x16 Intel flash */
/* Note that the code will not exit on a flash erasure error or timeout */
/* but will print and error message and continue processing sectors */
/* until they are all erased. */
/* 10-16-2002 P. Marchese */
ulong mask;
int timeout;
if (info->portwidth == 4)
/* {
printf ("- Warning: erasing of 32Bit (2*16Bit i.e. 2*28F640J3A) not supported yet !!!! \n");
return 1;
}*/
{
/* make sure it's Intel flash */
if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
/* yup! it's an Intel flash */
/* is it 16-bits wide? */
if (info->chipwidth == 2) {
/* yup! it's 16-bits wide */
/* are there any sectors to process? */
if ((s_first < 0) || (s_first > s_last)) {
printf ("Error: There are no sectors to erase\n");
printf ("Either sector %d is less than zero\n", s_first);
printf ("or sector %d is greater than sector %d\n", s_first, s_last);
return 1;
}
/* check for protected sectors */
prot = 0;
for (sect = s_first; sect <= s_last; ++sect)
if (info->protect[sect])
prot++;
/* if variable "prot" is nonzero, there are protected sectors */
if (prot)
printf ("- Warning: %d protected sectors will not be erased!\n", prot);
/* reset the flash */
flash_cmd (info->portwidth, addr, 0,
CHIP_CMD_RST);
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts ();
/* Clear the status register */
flash_cmd (info->portwidth, addr, 0,
CHIP_CMD_CLR_STAT);
flash_cmd (info->portwidth, addr, 0,
CHIP_CMD_RST);
/* Start erase on unprotected sectors */
for (sect = s_first; sect <= s_last; sect++) {
/* is the sector unprotected? */
if (info->protect[sect] == 0) { /* not protected */
/* issue the single block erase command, 0x20 */
flash_cmd (info->portwidth,
(volatile unsigned
char *) info->
start[sect], 0,
CHIP_CMD_ERASE1);
/* issue the erase confirm command, 0xD0 */
flash_cmd (info->portwidth,
(volatile unsigned
char *) info->
start[sect], 0,
CHIP_CMD_ERASE2);
l_sect = sect;
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts ();
/* poll for erasure completion */
/* put flash into read status mode by writing 0x70 to it */
flash_cmd (info->portwidth,
addr, 0,
CHIP_CMD_RD_STAT);
/* setup the status register mask */
mask = CHIP_STAT_RDY |
(CHIP_STAT_RDY << 16);
/* init. the timeout counter */
start = get_timer (0);
/* keep looping while the flash is not ready */
/* exit the loop by timing out or the flash */
/* becomes ready again */
timeout = 0;
while ((*
(volatile unsigned
long *) info->
start[sect] & mask) !=
mask) {
/* has the timeout limit been reached? */
if (get_timer (start)
>
CFG_FLASH_ERASE_TOUT)
{
/* timeout limit reached */
printf ("Time out limit reached erasing sector at address %08lx\n", info->start[sect]);
printf ("Continuing with next sector\n");
timeout = 1;
goto timed_out_error;
}
/* put flash into read status mode by writing 0x70 to it */
flash_cmd (info->
portwidth,
addr, 0,
CHIP_CMD_RD_STAT);
}
/* did we timeout? */
timed_out_error:if (timeout == 0)
{
/* didn't timeout, so check the status register */
/* create the status mask to check for errors */
mask = CHIP_STAT_ECLBS;
mask = mask | (mask <<
16);
/* put flash into read status mode by writing 0x70 to it */
flash_cmd (info->
portwidth,
addr, 0,
CHIP_CMD_RD_STAT);
/* are there any errors? */
if ((*
(volatile
unsigned long *)
info->
start[sect] &
mask) != 0) {
/* We got an erasure error */
printf ("Flash erasure error at address 0x%08lx\n", info->start[sect]);
printf ("Continuing with next sector\n");
/* reset the flash */
flash_cmd
(info->
portwidth,
addr,
0,
CHIP_CMD_RST);
}
}
/* erasure completed without errors */
/* reset the flash */
flash_cmd (info->portwidth,
addr, 0,
CHIP_CMD_RST);
} /* end if not protected */
} /* end for loop */
printf ("Flash erasure done\n");
return 0;
} else {
/* The Intel flash is not 16-bit wide */
/* print and error message and return */
/* NOTE: you can add routines here to handle other size flash */
printf ("Error: Intel flash device is only %d-bits wide\n", info->chipwidth * 8);
printf ("The erasure code only handles Intel 16-bit wide flash memory\n");
return 1;
}
} else {
/* Not Intel flash so return an error as a write timeout */
/* NOTE: if it's another type flash, stick its routine here */
printf ("Error: The flash device is not Intel type\n");
printf ("The erasure code only supports Intel flash in a 32-bit port width\n");
return 1;
}
}
/* end 32-bit wide flash code */
if ((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM)
return 1; /* Rom can not be erased */
if ((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) { /* RAM just copy 0s to RAM */
for (sect = s_first; sect <= s_last; sect++) {
int sector_size = info->size / info->sector_count;
addr = (uchar *) (info->start[sect]);
memset ((void *) addr, 0, sector_size);
}
return 0;
}
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_VENDMASK) == FLASH_MAN_INTEL) { /* Intel works spezial */
return flash_erase_intel (info,
(unsigned short) s_first,
(unsigned short) s_last);
}
#if 0
if ((info->flash_id == FLASH_UNKNOWN) || /* Flash is unknown to PPCBoot */
(info->flash_id > FLASH_AMD_COMP)) {
printf ("Can't erase unknown flash type %08lx - aborted\n",
info->flash_id);
return 1;
}
#endif
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 ();
flash_cmd (info->portwidth, addr, 0x555, 0xAA); /* start erase routine */
flash_cmd (info->portwidth, addr, 0x2AA, 0x55);
flash_cmd (info->portwidth, addr, 0x555, 0x80);
flash_cmd (info->portwidth, addr, 0x555, 0xAA);
flash_cmd (info->portwidth, addr, 0x2AA, 0x55);
/* Start erase on unprotected sectors */
for (sect = s_first; sect <= s_last; sect++) {
if (info->protect[sect] == 0) { /* not protected */
addr = (uchar *) (info->start[sect]);
flash_cmd (info->portwidth, 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 = (volatile unsigned char *) (info->start[l_sect]);
/* broken for 2x16: TODO */
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 = (volatile unsigned char *) info->start[0];
flash_cmd (info->portwidth, addr, 0, 0xf0);
flash_cmd (info->portwidth, addr, 0, 0xf0);
printf (" done\n");
return 0;
}
/*-----------------------------------------------------------------------
* Copy memory to flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
*/
/* broken for 2x16: TODO */
int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
{
ulong cp, wp, data;
int i, l, rc;
/* Commented out since the below code should work for 32-bit(2x 16 flash) */
/* 10-16-2002 P. Marchese */
/* if(info->portwidth==4) return 1; */
/* if(info->portwidth==4) {
printf ("- Warning: writting of 32Bit (2*16Bit i.e. 2*28F640J3A) not supported yet !!!! \n");
return 1;
}*/
if ((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM)
return 0;
if ((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) {
memcpy ((void *) addr, src, cnt);
return 0;
}
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
*/
/* broken for 2x16: TODO */
static int write_word (flash_info_t * info, ulong dest, ulong data)
{
volatile unsigned char *addr = (uchar *) (info->start[0]);
ulong start;
int flag, i;
ulong mask;
/* modified so that it handles 32-bit(2x16 Intel flash programming */
/* 10-16-2002 P. Marchese */
if (info->portwidth == 4)
/* {
printf ("- Warning: writting of 32Bit (2*16Bit i.e. 2*28F640J3A) not supported yet !!!! \n");
return 1;
}*/
{
/* make sure it's Intel flash */
if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
/* yup! it's an Intel flash */
/* is it 16-bits wide? */
if (info->chipwidth == 2) {
/* yup! it's 16-bits wide */
/* so we know how to program it */
/* reset the flash */
flash_cmd (info->portwidth, addr, 0,
CHIP_CMD_RST);
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts ();
/* Clear the status register */
flash_cmd (info->portwidth, addr, 0,
CHIP_CMD_CLR_STAT);
flash_cmd (info->portwidth, addr, 0,
CHIP_CMD_RST);
/* 1st cycle of word/byte program */
/* write 0x40 to the location to program */
flash_cmd (info->portwidth, (uchar *) dest, 0,
CHIP_CMD_PROG);
/* 2nd cycle of word/byte program */
/* write the data to the destination address */
*(ulong *) dest = data;
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts ();
/* setup the status register mask */
mask = CHIP_STAT_RDY | (CHIP_STAT_RDY << 16);
/* put flash into read status mode by writing 0x70 to it */
flash_cmd (info->portwidth, addr, 0,
CHIP_CMD_RD_STAT);
/* init. the timeout counter */
start = get_timer (0);
/* keep looping while the flash is not ready */
/* exit the loop by timing out or the flash */
/* becomes ready again */
/* 11-13-2002 Paul Marchese */
/* modified while loop conditional statement */
/* because we were always timing out. */
/* there is a type mismatch, "addr[0]" */
/* returns a byte but "mask" is a 32-bit value */
while ((*(volatile unsigned long *) info->
start[0] & mask) != mask)
/* original code */
/* while (addr[0] & mask) != mask) */
{
/* has the timeout limit been reached? */
if (get_timer (start) >
CFG_FLASH_WRITE_TOUT) {
/* timeout limit reached */
printf ("Time out limit reached programming address %08lx with data %08lx\n", dest, data);
/* reset the flash */
flash_cmd (info->portwidth,
addr, 0,
CHIP_CMD_RST);
return (1);
}
/* put flash into read status mode by writing 0x70 to it */
flash_cmd (info->portwidth, addr, 0,
CHIP_CMD_RD_STAT);
}
/* flash is ready, so check the status */
/* create the status mask to check for errors */
mask = CHIP_STAT_DPS | CHIP_STAT_VPPS |
CHIP_STAT_PSLBS;
mask = mask | (mask << 16);
/* put flash into read status mode by writing 0x70 to it */
flash_cmd (info->portwidth, addr, 0,
CHIP_CMD_RD_STAT);
/* are there any errors? */
if ((addr[0] & mask) != 0) {
/* We got a one of the following errors: */
/* Voltage range, Device protect, or programming */
/* return the error as a device timeout */
/* put flash into read status mode by writing 0x70 to it */
flash_cmd (info->portwidth, addr, 0,
CHIP_CMD_RD_STAT);
printf ("Flash programming error at address 0x%08lx\n", dest);
printf ("Flash status register contains 0x%08lx\n", (unsigned long) addr[0]);
/* reset the flash */
flash_cmd (info->portwidth, addr, 0,
CHIP_CMD_RST);
return 1;
}
/* write completed without errors */
/* reset the flash */
flash_cmd (info->portwidth, addr, 0,
CHIP_CMD_RST);
return 0;
} else {
/* it's not 16-bits wide, so return an error as a write timeout */
/* NOTE: you can add routines here to handle other size flash */
printf ("Error: Intel flash device is only %d-bits wide\n", info->chipwidth * 8);
printf ("The write code only handles Intel 16-bit wide flash memory\n");
return 1;
}
} else {
/* not Intel flash so return an error as a write timeout */
/* NOTE: if it's another type flash, stick its routine here */
printf ("Error: The flash device is not Intel type\n");
printf ("The code only supports Intel flash in a 32-bit port width\n");
return 1;
}
}
/* end of 32-bit flash code */
if ((info->flash_id & FLASH_TYPEMASK) == FLASH_ROM)
return 1;
if ((info->flash_id & FLASH_TYPEMASK) == FLASH_RAM) {
*(unsigned long *) dest = data;
return 0;
}
if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
unsigned short low = data & 0xffff;
unsigned short hi = (data >> 16) & 0xffff;
int ret = write_word_intel ((bank_addr_t) dest, hi);
if (!ret)
ret = write_word_intel ((bank_addr_t) (dest + 2),
low);
return ret;
}
/* Check if Flash is (sufficiently) erased */
if ((*((vu_long *) dest) & data) != data) {
return (2);
}
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts ();
/* first, perform an unlock bypass command to speed up flash writes */
addr[0x555] = 0xAA;
addr[0x2AA] = 0x55;
addr[0x555] = 0x20;
/* write each byte out */
for (i = 0; i < 4; i++) {
char *data_ch = (char *) &data;
addr[0] = 0xA0;
*(((char *) dest) + i) = data_ch[i];
udelay (10); /* XXX */
}
/* we're done, now do an unlock bypass reset */
addr[0] = 0x90;
addr[0] = 0x00;
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts ();
/* data polling for D7 */
start = get_timer (0);
while ((*((vu_long *) dest) & 0x00800080) != (data & 0x00800080)) {
if (get_timer (start) > CFG_FLASH_WRITE_TOUT) {
return (1);
}
}
return (0);
}
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