/*
* (C) Copyright 2002-2004
* Brad Kemp, Seranoa Networks, Brad.Kemp@seranoa.com
*
* Copyright (C) 2003 Arabella Software Ltd.
* Yuli Barcohen <yuli@arabellasw.com>
*
* Copyright (C) 2004
* Ed Okerson
*
* Copyright (C) 2006
* Tolunay Orkun <listmember@orkun.us>
*
* 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
*
*/
/* The DEBUG define must be before common to enable debugging */
/* #define DEBUG */
#include <common.h>
#include <asm/byteorder.h>
#include <environment.h>
#include <clock.h>
#include <init.h>
#include <malloc.h>
#include <cfi_flash_new.h>
#include <asm/io.h>
#include <errno.h>
/*
* This file implements a Common Flash Interface (CFI) driver for barebox.
* The width of the port and the width of the chips are determined at initialization.
* These widths are used to calculate the address for access CFI data structures.
*
* References
* JEDEC Standard JESD68 - Common Flash Interface (CFI)
* JEDEC Standard JEP137-A Common Flash Interface (CFI) ID Codes
* Intel Application Note 646 Common Flash Interface (CFI) and Command Sets
* Intel 290667-008 3 Volt Intel StrataFlash Memory datasheet
* AMD CFI Specification, Release 2.0 December 1, 2001
* AMD/Spansion Application Note: Migration from Single-byte to Three-byte
* Device IDs, Publication Number 25538 Revision A, November 8, 2001
*
*/
#define NUM_ERASE_REGIONS 4 /* max. number of erase regions */
static uint flash_offset_cfi[2]={FLASH_OFFSET_CFI,FLASH_OFFSET_CFI_ALT};
/*
* Check if chip width is defined. If not, start detecting with 8bit.
*/
#ifndef CFG_FLASH_CFI_WIDTH
#define CFG_FLASH_CFI_WIDTH FLASH_CFI_8BIT
#endif
/*
* Functions
*/
static void flash_add_byte (flash_info_t * info, cfiword_t * cword, uchar c)
{
#if defined(__LITTLE_ENDIAN)
unsigned short w;
unsigned int l;
unsigned long long ll;
#endif
if (bankwidth_is_1(info)) {
cword->c = c;
} else if (bankwidth_is_2(info)) {
#if defined(__LITTLE_ENDIAN)
w = c;
w <<= 8;
cword->w = (cword->w >> 8) | w;
#else
cword->w = (cword->w << 8) | c;
#endif
} else if (bankwidth_is_4(info)) {
#if defined(__LITTLE_ENDIAN)
l = c;
l <<= 24;
cword->l = (cword->l >> 8) | l;
#else
cword->l = (cword->l << 8) | c;
#endif
} else if (bankwidth_is_8(info)) {
#if defined(__LITTLE_ENDIAN)
ll = c;
ll <<= 56;
cword->ll = (cword->ll >> 8) | ll;
#else
cword->ll = (cword->ll << 8) | c;
#endif
}
}
static int flash_write_cfiword (flash_info_t * info, ulong dest,
cfiword_t cword)
{
cfiptr_t ctladdr;
cfiptr_t cptr;
int flag;
ctladdr.cp = flash_make_addr (info, 0, 0);
cptr.cp = (uchar *) dest;
/* Check if Flash is (sufficiently) erased */
if (bankwidth_is_1(info)) {
flag = ((cptr.cp[0] & cword.c) == cword.c);
} else if (bankwidth_is_2(info)) {
flag = ((cptr.wp[0] & cword.w) == cword.w);
} else if (bankwidth_is_4(info)) {
flag = ((cptr.lp[0] & cword.l) == cword.l);
} else if (bankwidth_is_8(info)) {
flag = ((cptr.llp[0] & cword.ll) == cword.ll);
} else
return 2;
if (!flag)
return 2;
/* Disable interrupts which might cause a timeout here */
// flag = disable_interrupts ();
info->cfi_cmd_set->flash_prepare_write(info);
if (bankwidth_is_1(info)) {
cptr.cp[0] = cword.c;
} else if (bankwidth_is_2(info)) {
cptr.wp[0] = cword.w;
} else if (bankwidth_is_4(info)) {
cptr.lp[0] = cword.l;
} else if (bankwidth_is_8(info)) {
cptr.llp[0] = cword.ll;
}
/* re-enable interrupts if necessary */
if (flag)
enable_interrupts ();
return flash_status_check (info, find_sector (info, dest),
info->write_tout, "write");
}
#ifdef DEBUG
/*
* Debug support
*/
void print_longlong (char *str, unsigned long long data)
{
int i;
char *cp;
cp = (unsigned char *) &data;
for (i = 0; i < 8; i++)
sprintf (&str[i * 2], "%2.2x", *cp++);
}
static void flash_printqry (flash_info_t * info, flash_sect_t sect)
{
cfiptr_t cptr;
int x, y;
for (x = 0; x < 0x40; x += 16U / info->portwidth) {
cptr.cp =
flash_make_addr (info, sect,
x + FLASH_OFFSET_CFI_RESP);
debug ("%p : ", cptr.cp);
for (y = 0; y < 16; y++) {
debug ("%2.2x ", cptr.cp[y]);
}
debug (" ");
for (y = 0; y < 16; y++) {
if (cptr.cp[y] >= 0x20 && cptr.cp[y] <= 0x7e) {
debug ("%c", cptr.cp[y]);
} else {
debug (".");
}
}
debug ("\n");
}
}
#endif
/*
* read a short word by swapping for ppc format.
*/
static ushort flash_read_ushort (flash_info_t * info, flash_sect_t sect, uint offset)
{
uchar *addr;
ushort retval;
#ifdef DEBUG
int x;
#endif
addr = flash_make_addr (info, sect, offset);
#ifdef DEBUG
debug ("ushort addr is at %p info->portwidth = %d\n", addr,
info->portwidth);
for (x = 0; x < 2 * info->portwidth; x++) {
debug ("addr[%x] = 0x%x\n", x, addr[x]);
}
#endif
#if defined(__LITTLE_ENDIAN)
retval = ((addr[(info->portwidth)] << 8) | addr[0]);
#else
retval = ((addr[(2 * info->portwidth) - 1] << 8) |
addr[info->portwidth - 1]);
#endif
debug ("retval = 0x%x\n", retval);
return retval;
}
/*
* read a long word by picking the least significant byte of each maximum
* port size word. Swap for ppc format.
*/
static ulong flash_read_long (flash_info_t * info, flash_sect_t sect, uint offset)
{
uchar *addr;
ulong retval;
#ifdef DEBUG
int x;
#endif
addr = flash_make_addr (info, sect, offset);
#ifdef DEBUG
debug ("long addr is at %p info->portwidth = %d\n", addr,
info->portwidth);
for (x = 0; x < 4 * info->portwidth; x++) {
debug ("addr[%x] = 0x%x\n", x, addr[x]);
}
#endif
#if defined(__LITTLE_ENDIAN)
retval = (addr[0] << 16) | (addr[(info->portwidth)] << 24) |
(addr[(2 * info->portwidth)]) | (addr[(3 * info->portwidth)] << 8);
#else
retval = (addr[(2 * info->portwidth) - 1] << 24) |
(addr[(info->portwidth) - 1] << 16) |
(addr[(4 * info->portwidth) - 1] << 8) |
addr[(3 * info->portwidth) - 1];
#endif
return retval;
}
/*
* detect if flash is compatible with the Common Flash Interface (CFI)
* http://www.jedec.org/download/search/jesd68.pdf
*
*/
static int flash_detect_cfi (flash_info_t * info)
{
int cfi_offset;
debug ("flash detect cfi\n");
for (info->portwidth = CFG_FLASH_CFI_WIDTH;
info->portwidth <= FLASH_CFI_64BIT; info->portwidth <<= 1) {
for (info->chipwidth = FLASH_CFI_BY8;
info->chipwidth <= info->portwidth;
info->chipwidth <<= 1) {
flash_write_cmd (info, 0, 0, info->cmd_reset);
for (cfi_offset=0; cfi_offset < sizeof(flash_offset_cfi)/sizeof(uint); cfi_offset++) {
flash_write_cmd (info, 0, flash_offset_cfi[cfi_offset], FLASH_CMD_CFI);
if (flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP, 'Q')
&& flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP + 1, 'R')
&& flash_isequal (info, 0, FLASH_OFFSET_CFI_RESP + 2, 'Y')) {
info->interface = flash_read_ushort (info, 0, FLASH_OFFSET_INTERFACE);
info->cfi_offset=flash_offset_cfi[cfi_offset];
debug ("device interface is %d\n",
info->interface);
debug ("found port %d chip %d ",
info->portwidth, info->chipwidth);
debug ("port %d bits chip %d bits\n",
info->portwidth << CFI_FLASH_SHIFT_WIDTH,
info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
return 1;
}
}
}
}
debug ("not found\n");
return 0;
}
/*
* The following code cannot be run from FLASH!
*/
static ulong flash_get_size (flash_info_t *info, ulong base)
{
int i, j;
flash_sect_t sect_cnt;
unsigned long sector;
unsigned long tmp;
int size_ratio;
uchar num_erase_regions;
int erase_region_size;
int erase_region_count;
int geometry_reversed = 0;
info->ext_addr = 0;
info->cfi_version = 0;
#ifdef CFG_FLASH_PROTECTION
info->legacy_unlock = 0;
#endif
/* first only malloc space for the first sector */
info->start = malloc(sizeof(ulong));
info->start[0] = base;
info->protect = 0;
if (flash_detect_cfi (info)) {
info->vendor = flash_read_ushort (info, 0,
FLASH_OFFSET_PRIMARY_VENDOR);
switch (info->vendor) {
#ifdef CONFIG_DRIVER_CFI_INTEL
case CFI_CMDSET_INTEL_EXTENDED:
case CFI_CMDSET_INTEL_STANDARD:
info->cfi_cmd_set = &cfi_cmd_set_intel;
break;
#endif
#ifdef CONFIG_DRIVER_CFI_AMD
case CFI_CMDSET_AMD_STANDARD:
case CFI_CMDSET_AMD_EXTENDED:
info->cfi_cmd_set = &cfi_cmd_set_amd;
break;
#endif
default:
printf("unsupported vendor\n");
return 0;
}
info->cfi_cmd_set->flash_read_jedec_ids (info);
flash_write_cmd (info, 0, info->cfi_offset, FLASH_CMD_CFI);
num_erase_regions = flash_read_uchar (info,
FLASH_OFFSET_NUM_ERASE_REGIONS);
info->ext_addr = flash_read_ushort (info, 0,
FLASH_OFFSET_EXT_QUERY_T_P_ADDR);
if (info->ext_addr) {
info->cfi_version = (ushort) flash_read_uchar (info,
info->ext_addr + 3) << 8;
info->cfi_version |= (ushort) flash_read_uchar (info,
info->ext_addr + 4);
}
#ifdef DEBUG
flash_printqry (info, 0);
#endif
switch (info->vendor) {
case CFI_CMDSET_INTEL_STANDARD:
case CFI_CMDSET_INTEL_EXTENDED:
default:
info->cmd_reset = FLASH_CMD_RESET;
#ifdef CFG_FLASH_PROTECTION
/* read legacy lock/unlock bit from intel flash */
if (info->ext_addr) {
info->legacy_unlock = flash_read_uchar (info,
info->ext_addr + 5) & 0x08;
}
#endif
break;
case CFI_CMDSET_AMD_STANDARD:
case CFI_CMDSET_AMD_EXTENDED:
info->cmd_reset = AMD_CMD_RESET;
/* check if flash geometry needs reversal */
if (num_erase_regions <= 1)
break;
/* reverse geometry if top boot part */
if (info->cfi_version < 0x3131) {
/* CFI < 1.1, try to guess from device id */
if ((info->device_id & 0x80) != 0) {
geometry_reversed = 1;
}
break;
}
/* CFI >= 1.1, deduct from top/bottom flag */
/* note: ext_addr is valid since cfi_version > 0 */
if (flash_read_uchar(info, info->ext_addr + 0xf) == 3) {
geometry_reversed = 1;
}
break;
}
debug ("manufacturer is %d\n", info->vendor);
debug ("manufacturer id is 0x%x\n", info->manufacturer_id);
debug ("device id is 0x%x\n", info->device_id);
debug ("device id2 is 0x%x\n", info->device_id2);
debug ("cfi version is 0x%04x\n", info->cfi_version);
size_ratio = info->portwidth / info->chipwidth;
/* if the chip is x8/x16 reduce the ratio by half */
if ((info->interface == FLASH_CFI_X8X16)
&& (info->chipwidth == FLASH_CFI_BY8)) {
size_ratio >>= 1;
}
debug ("size_ratio %d port %d bits chip %d bits\n",
size_ratio, info->portwidth << CFI_FLASH_SHIFT_WIDTH,
info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
debug ("found %d erase regions\n", num_erase_regions);
sect_cnt = 0;
sector = base;
for (i = 0; i < num_erase_regions; i++) {
if (i > NUM_ERASE_REGIONS) {
printf ("%d erase regions found, only %d used\n",
num_erase_regions, NUM_ERASE_REGIONS);
break;
}
if (geometry_reversed)
tmp = flash_read_long (info, 0,
FLASH_OFFSET_ERASE_REGIONS +
(num_erase_regions - 1 - i) * 4);
else
tmp = flash_read_long (info, 0,
FLASH_OFFSET_ERASE_REGIONS +
i * 4);
erase_region_size =
(tmp & 0xffff) ? ((tmp & 0xffff) * 256) : 128;
tmp >>= 16;
erase_region_count = (tmp & 0xffff) + 1;
debug ("erase_region_count = %d erase_region_size = %d\n",
erase_region_count, erase_region_size);
/* increase the space malloced for the sector start addresses */
info->start = realloc(info->start, sizeof(ulong) * (erase_region_count + sect_cnt));
info->protect = realloc(info->protect, sizeof(uchar) * (erase_region_count + sect_cnt));
for (j = 0; j < erase_region_count; j++) {
info->start[sect_cnt] = sector;
sector += (erase_region_size * size_ratio);
/*
* Only read protection status from supported devices (intel...)
*/
switch (info->vendor) {
case CFI_CMDSET_INTEL_EXTENDED:
case CFI_CMDSET_INTEL_STANDARD:
info->protect[sect_cnt] =
flash_isset (info, sect_cnt,
FLASH_OFFSET_PROTECT,
FLASH_STATUS_PROTECT);
break;
default:
info->protect[sect_cnt] = 0; /* default: not protected */
}
sect_cnt++;
}
}
info->sector_count = sect_cnt;
/* multiply the size by the number of chips */
info->size = (1 << flash_read_uchar (info, FLASH_OFFSET_SIZE)) * size_ratio;
info->buffer_size = (1 << flash_read_ushort (info, 0, FLASH_OFFSET_BUFFER_SIZE));
tmp = 1 << flash_read_uchar (info, FLASH_OFFSET_ETOUT);
info->erase_blk_tout = (tmp * (1 << flash_read_uchar (info, FLASH_OFFSET_EMAX_TOUT)));
tmp = (1 << flash_read_uchar (info, FLASH_OFFSET_WBTOUT)) *
(1 << flash_read_uchar (info, FLASH_OFFSET_WBMAX_TOUT));
info->buffer_write_tout = tmp * 1000;
tmp = (1 << flash_read_uchar (info, FLASH_OFFSET_WTOUT)) *
(1 << flash_read_uchar (info, FLASH_OFFSET_WMAX_TOUT));
info->write_tout = tmp * 1000;
info->flash_id = FLASH_MAN_CFI;
if ((info->interface == FLASH_CFI_X8X16) && (info->chipwidth == FLASH_CFI_BY8)) {
info->portwidth >>= 1; /* XXX - Need to test on x8/x16 in parallel. */
}
}
flash_write_cmd (info, 0, 0, info->cmd_reset);
return (info->size);
}
/* loop through the sectors from the highest address
* when the passed address is greater or equal to the sector address
* we have a match
*/
flash_sect_t find_sector (flash_info_t * info, ulong addr)
{
flash_sect_t sector;
for (sector = info->sector_count - 1; sector >= 0; sector--) {
if (addr >= info->start[sector])
break;
}
return sector;
}
static int cfi_erase(struct cdev *cdev, size_t count, unsigned long offset)
{
flash_info_t *finfo = (flash_info_t *)cdev->priv;
unsigned long start, end;
int i, ret = 0;
printf("%s: erase 0x%08x (size %d)\n", __FUNCTION__, offset, count);
start = find_sector(finfo, cdev->dev->map_base + offset);
end = find_sector(finfo, cdev->dev->map_base + offset + count - 1);
for (i = start; i <= end; i++) {
ret = finfo->cfi_cmd_set->flash_erase_one(finfo, i);
if (ret)
goto out;
}
out:
putchar('\n');
return ret;
}
/*
* Copy memory to flash, returns:
* 0 - OK
* 1 - write timeout
* 2 - Flash not erased
*/
static int write_buff (flash_info_t * info, const uchar * src, ulong addr, ulong cnt)
{
ulong wp;
ulong cp;
int aln;
cfiword_t cword;
int i, rc;
#ifdef CONFIG_CFI_BUFFER_WRITE
int buffered_size;
#endif
/* get lower aligned address */
/* get lower aligned address */
wp = (addr & ~(info->portwidth - 1));
/* handle unaligned start */
if ((aln = addr - wp) != 0) {
cword.l = 0;
cp = wp;
for (i = 0; i < aln; ++i, ++cp)
flash_add_byte (info, &cword, (*(uchar *) cp));
for (; (i < info->portwidth) && (cnt > 0); i++) {
flash_add_byte (info, &cword, *src++);
cnt--;
cp++;
}
for (; (cnt == 0) && (i < info->portwidth); ++i, ++cp)
flash_add_byte (info, &cword, (*(uchar *) cp));
if ((rc = flash_write_cfiword (info, wp, cword)) != 0)
return rc;
wp = cp;
}
/* handle the aligned part */
#ifdef CONFIG_CFI_BUFFER_WRITE
buffered_size = (info->portwidth / info->chipwidth);
buffered_size *= info->buffer_size;
while (cnt >= info->portwidth) {
/* prohibit buffer write when buffer_size is 1 */
if (info->buffer_size == 1) {
cword.l = 0;
for (i = 0; i < info->portwidth; i++)
flash_add_byte (info, &cword, *src++);
if ((rc = flash_write_cfiword (info, wp, cword)) != 0)
return rc;
wp += info->portwidth;
cnt -= info->portwidth;
continue;
}
/* write buffer until next buffered_size aligned boundary */
i = buffered_size - (wp % buffered_size);
if (i > cnt)
i = cnt;
if ((rc = info->cfi_cmd_set->flash_write_cfibuffer (info, wp, src, i)) != ERR_OK)
return rc;
i -= i & (info->portwidth - 1);
wp += i;
src += i;
cnt -= i;
}
#else
while (cnt >= info->portwidth) {
cword.l = 0;
for (i = 0; i < info->portwidth; i++) {
flash_add_byte (info, &cword, *src++);
}
if ((rc = flash_write_cfiword (info, wp, cword)) != 0)
return rc;
wp += info->portwidth;
cnt -= info->portwidth;
}
#endif /* CONFIG_CFI_BUFFER_WRITE */
if (cnt == 0) {
return (0);
}
/*
* handle unaligned tail bytes
*/
cword.l = 0;
for (i = 0, cp = wp; (i < info->portwidth) && (cnt > 0); ++i, ++cp) {
flash_add_byte (info, &cword, *src++);
--cnt;
}
for (; i < info->portwidth; ++i, ++cp) {
flash_add_byte (info, &cword, (*(uchar *) cp));
}
return flash_write_cfiword (info, wp, cword);
}
static int flash_real_protect (flash_info_t * info, long sector, int prot)
{
int retcode = 0;
flash_write_cmd (info, sector, 0, FLASH_CMD_CLEAR_STATUS);
flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT);
if (prot)
flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT_SET);
else
flash_write_cmd (info, sector, 0, FLASH_CMD_PROTECT_CLEAR);
if ((retcode =
flash_status_check (info, sector, info->erase_blk_tout,
prot ? "protect" : "unprotect")) == 0) {
info->protect[sector] = prot;
/*
* On some of Intel's flash chips (marked via legacy_unlock)
* unprotect unprotects all locking.
*/
if ((prot == 0) && (info->legacy_unlock)) {
flash_sect_t i;
for (i = 0; i < info->sector_count; i++) {
if (info->protect[i])
flash_real_protect (info, i, 1);
}
}
}
return retcode;
}
static int cfi_protect(struct cdev *cdev, size_t count, unsigned long offset, int prot)
{
flash_info_t *finfo = (flash_info_t *)cdev->priv;
unsigned long start, end;
int i, ret = 0;
printf("%s: protect 0x%08x (size %d)\n", __FUNCTION__, cdev->dev->map_base + offset, count);
start = find_sector(finfo, cdev->dev->map_base + offset);
end = find_sector(finfo, cdev->dev->map_base + offset + count - 1);
for (i = start; i <= end; i++) {
ret = flash_real_protect (finfo, i, prot);
if (ret)
goto out;
}
out:
putchar('\n');
return ret;
}
static ssize_t cfi_write(struct cdev *cdev, const void *buf, size_t count, unsigned long offset, ulong flags)
{
flash_info_t *finfo = (flash_info_t *)cdev->priv;
int ret;
debug("cfi_write: buf=0x%08x addr=0x%08x count=0x%08x\n",buf, cdev->dev->map_base + offset, count);
ret = write_buff (finfo, buf, cdev->dev->map_base + offset, count);
return ret == 0 ? count : -1;
}
static void cfi_info (struct device_d* dev)
{
flash_info_t *info = (flash_info_t *)dev->priv;
int i;
if (info->flash_id != FLASH_MAN_CFI) {
puts ("missing or unknown FLASH type\n");
return;
}
printf ("CFI conformant FLASH (%d x %d)",
(info->portwidth << 3), (info->chipwidth << 3));
printf (" Size: %ld MB in %d Sectors\n",
info->size >> 20, info->sector_count);
printf (" ");
switch (info->vendor) {
case CFI_CMDSET_INTEL_STANDARD:
printf ("Intel Standard");
break;
case CFI_CMDSET_INTEL_EXTENDED:
printf ("Intel Extended");
break;
case CFI_CMDSET_AMD_STANDARD:
printf ("AMD Standard");
break;
case CFI_CMDSET_AMD_EXTENDED:
printf ("AMD Extended");
break;
default:
printf ("Unknown (%d)", info->vendor);
break;
}
printf (" command set, Manufacturer ID: 0x%02X, Device ID: 0x%02X",
info->manufacturer_id, info->device_id);
if (info->device_id == 0x7E) {
printf("%04X", info->device_id2);
}
printf ("\n Erase timeout: %ld ms, write timeout: %ld ms\n",
info->erase_blk_tout,
info->write_tout);
if (info->buffer_size > 1) {
printf (" Buffer write timeout: %ld ms, buffer size: %d bytes\n",
info->buffer_write_tout,
info->buffer_size);
}
puts ("\n Sector Start Addresses:");
for (i = 0; i < info->sector_count; ++i) {
if ((i % 5) == 0)
printf ("\n");
#ifdef CFG_FLASH_EMPTY_INFO
{
int k;
int size;
int erased;
volatile unsigned long *flash;
/*
* Check if whole sector is erased
*/
if (i != (info->sector_count - 1))
size = info->start[i + 1] - info->start[i];
else
size = info->start[0] + info->size - info->start[i];
erased = 1;
flash = (volatile unsigned long *) info->start[i];
size = size >> 2; /* divide by 4 for longword access */
for (k = 0; k < size; k++) {
if (*flash++ != 0xffffffff) {
erased = 0;
break;
}
}
/* print empty and read-only info */
printf (" %08lX %c %s ",
info->start[i],
erased ? 'E' : ' ',
info->protect[i] ? "RO" : " ");
}
#else /* ! CFG_FLASH_EMPTY_INFO */
printf (" %08lX %s ",
info->start[i],
info->protect[i] ? "RO" : " ");
#endif
}
putchar('\n');
return;
}
#if 0
/*
* flash_read_user_serial - read the OneTimeProgramming cells
*/
static void flash_read_user_serial (flash_info_t * info, void *buffer, int offset,
int len)
{
uchar *src;
uchar *dst;
dst = buffer;
src = flash_make_addr (info, 0, FLASH_OFFSET_USER_PROTECTION);
flash_write_cmd (info, 0, 0, FLASH_CMD_READ_ID);
memcpy (dst, src + offset, len);
flash_write_cmd (info, 0, 0, info->cmd_reset);
}
/*
* flash_read_factory_serial - read the device Id from the protection area
*/
static void flash_read_factory_serial (flash_info_t * info, void *buffer, int offset,
int len)
{
uchar *src;
src = flash_make_addr (info, 0, FLASH_OFFSET_INTEL_PROTECTION);
flash_write_cmd (info, 0, 0, FLASH_CMD_READ_ID);
memcpy (buffer, src + offset, len);
flash_write_cmd (info, 0, 0, info->cmd_reset);
}
#endif
int flash_status_check (flash_info_t * info, flash_sect_t sector,
uint64_t tout, char *prompt)
{
return info->cfi_cmd_set->flash_status_check(info, sector, tout, prompt);
}
/*
* wait for XSR.7 to be set. Time out with an error if it does not.
* This routine does not set the flash to read-array mode.
*/
int flash_generic_status_check (flash_info_t * info, flash_sect_t sector,
uint64_t tout, char *prompt)
{
uint64_t start;
tout *= 1000000;
/* Wait for command completion */
start = get_time_ns();
while (info->cfi_cmd_set->flash_is_busy (info, sector)) {
if (is_timeout(start, tout)) {
printf ("Flash %s timeout at address %lx data %lx\n",
prompt, info->start[sector],
flash_read_long (info, sector, 0));
flash_write_cmd (info, sector, 0, info->cmd_reset);
return ERR_TIMOUT;
}
udelay (1); /* also triggers watchdog */
}
return ERR_OK;
}
/*
* make a proper sized command based on the port and chip widths
*/
void flash_make_cmd (flash_info_t * info, uchar cmd, void *cmdbuf)
{
int i;
uchar *cp = (uchar *) cmdbuf;
#if defined(__LITTLE_ENDIAN)
for (i = info->portwidth; i > 0; i--)
#else
for (i = 1; i <= info->portwidth; i++)
#endif
*cp++ = (i & (info->chipwidth - 1)) ? '\0' : cmd;
}
/*
* Write a proper sized command to the correct address
*/
void flash_write_cmd (flash_info_t * info, flash_sect_t sect, uint offset, uchar cmd)
{
uchar *addr;
cfiword_t cword;
addr = flash_make_addr (info, sect, offset);
flash_make_cmd (info, cmd, &cword);
flash_write_word(info, cword, addr);
}
int flash_isequal (flash_info_t * info, flash_sect_t sect, uint offset, uchar cmd)
{
cfiptr_t cptr;
cfiword_t cword;
int retval;
cptr.cp = flash_make_addr (info, sect, offset);
flash_make_cmd (info, cmd, &cword);
debug ("is= cmd %x(%c) addr %p ", cmd, cmd, cptr.cp);
if (bankwidth_is_1(info)) {
debug ("is= %x %x\n", cptr.cp[0], cword.c);
retval = (cptr.cp[0] == cword.c);
} else if (bankwidth_is_2(info)) {
debug ("is= %4.4x %4.4x\n", cptr.wp[0], cword.w);
retval = (cptr.wp[0] == cword.w);
} else if (bankwidth_is_4(info)) {
debug ("is= %8.8lx %8.8lx\n", cptr.lp[0], cword.l);
retval = (cptr.lp[0] == cword.l);
} else if (bankwidth_is_8(info)) {
#ifdef DEBUG
{
char str1[20];
char str2[20];
print_longlong (str1, cptr.llp[0]);
print_longlong (str2, cword.ll);
debug ("is= %s %s\n", str1, str2);
}
#endif
retval = (cptr.llp[0] == cword.ll);
} else
retval = 0;
return retval;
}
int flash_isset (flash_info_t * info, flash_sect_t sect, uint offset, uchar cmd)
{
cfiptr_t cptr;
cfiword_t cword;
int retval;
cptr.cp = flash_make_addr (info, sect, offset);
flash_make_cmd (info, cmd, &cword);
if (bankwidth_is_1(info)) {
retval = ((cptr.cp[0] & cword.c) == cword.c);
} else if (bankwidth_is_2(info)) {
retval = ((cptr.wp[0] & cword.w) == cword.w);
} else if (bankwidth_is_4(info)) {
retval = ((cptr.lp[0] & cword.l) == cword.l);
} else if (bankwidth_is_8(info)) {
retval = ((cptr.llp[0] & cword.ll) == cword.ll);
} else
retval = 0;
return retval;
}
struct file_operations cfi_ops = {
.read = mem_read,
.write = cfi_write,
.lseek = dev_lseek_default,
.erase = cfi_erase,
.protect = cfi_protect,
.memmap = generic_memmap_ro,
};
static int cfi_probe (struct device_d *dev)
{
unsigned long size = 0;
flash_info_t *info = xzalloc(sizeof(flash_info_t));
dev->priv = (void *)info;
printf("cfi_probe: %s base: 0x%08x size: 0x%08x\n", dev->name, dev->map_base, dev->size);
/* Init: no FLASHes known */
info->flash_id = FLASH_UNKNOWN;
size += info->size = flash_get_size(info, dev->map_base);
if (dev->size == 0) {
printf("cfi_probe: size : 0x%08x\n", info->size);
dev->size = info->size;
}
if (info->flash_id == FLASH_UNKNOWN) {
printf ("## Unknown FLASH on Bank at 0x%08x - Size = 0x%08lx = %ld MB\n",
dev->map_base, info->size, info->size << 20);
return -ENODEV;
}
info->cdev.name = asprintf("nor%d", dev->id);
info->cdev.size = info->size;
info->cdev.dev = dev;
info->cdev.ops = &cfi_ops;
info->cdev.priv = info;
devfs_create(&info->cdev);
return 0;
}
static struct driver_d cfi_driver = {
.name = "cfi_flash",
.probe = cfi_probe,
.info = cfi_info,
};
static int cfi_init(void)
{
return register_driver(&cfi_driver);
}
device_initcall(cfi_init);
