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u-boot/drivers/mtd/jedec_flash.c
Tor Krill 90447ecbba MTD/CFI: Add support for 16bit legacy AMD flash 
Add entry for 512Kx16 AMD flash to jedec_table.
Read out 16bit device id if chipwidth is 16bit.
Fixed coding style after Stefans feedback

Signed-off-by: Tor Krill <tor@excito.com>
2008-03-28 11:44:23 +01:00

327 lines
8.1 KiB
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/*
* (C) Copyright 2007
* Michael Schwingen, <michael@schwingen.org>
*
* based in great part on jedec_probe.c from linux kernel:
* (C) 2000 Red Hat. GPL'd.
* Occasionally maintained by Thayne Harbaugh tharbaugh at lnxi dot com
*
* 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/processor.h>
#include <asm/io.h>
#include <asm/byteorder.h>
#include <environment.h>
#define P_ID_AMD_STD CFI_CMDSET_AMD_LEGACY
/* Manufacturers */
#define MANUFACTURER_AMD 0x0001
#define MANUFACTURER_SST 0x00BF
/* AMD */
#define AM29DL800BB 0x22C8
#define AM29DL800BT 0x224A
#define AM29F800BB 0x2258
#define AM29F800BT 0x22D6
#define AM29LV400BB 0x22BA
#define AM29LV400BT 0x22B9
#define AM29LV800BB 0x225B
#define AM29LV800BT 0x22DA
#define AM29LV160DT 0x22C4
#define AM29LV160DB 0x2249
#define AM29F017D 0x003D
#define AM29F016D 0x00AD
#define AM29F080 0x00D5
#define AM29F040 0x00A4
#define AM29LV040B 0x004F
#define AM29F032B 0x0041
#define AM29F002T 0x00B0
/* SST */
#define SST39LF800 0x2781
#define SST39LF160 0x2782
#define SST39VF1601 0x234b
#define SST39LF512 0x00D4
#define SST39LF010 0x00D5
#define SST39LF020 0x00D6
#define SST39LF040 0x00D7
#define SST39SF010A 0x00B5
#define SST39SF020A 0x00B6
/*
* Unlock address sets for AMD command sets.
* Intel command sets use the MTD_UADDR_UNNECESSARY.
* Each identifier, except MTD_UADDR_UNNECESSARY, and
* MTD_UADDR_NO_SUPPORT must be defined below in unlock_addrs[].
* MTD_UADDR_NOT_SUPPORTED must be 0 so that structure
* initialization need not require initializing all of the
* unlock addresses for all bit widths.
*/
enum uaddr {
MTD_UADDR_NOT_SUPPORTED = 0, /* data width not supported */
MTD_UADDR_0x0555_0x02AA,
MTD_UADDR_0x0555_0x0AAA,
MTD_UADDR_0x5555_0x2AAA,
MTD_UADDR_0x0AAA_0x0555,
MTD_UADDR_DONT_CARE, /* Requires an arbitrary address */
MTD_UADDR_UNNECESSARY, /* Does not require any address */
};
struct unlock_addr {
u32 addr1;
u32 addr2;
};
/*
* I don't like the fact that the first entry in unlock_addrs[]
* exists, but is for MTD_UADDR_NOT_SUPPORTED - and, therefore,
* should not be used. The problem is that structures with
* initializers have extra fields initialized to 0. It is _very_
* desireable to have the unlock address entries for unsupported
* data widths automatically initialized - that means that
* MTD_UADDR_NOT_SUPPORTED must be 0 and the first entry here
* must go unused.
*/
static const struct unlock_addr unlock_addrs[] = {
[MTD_UADDR_NOT_SUPPORTED] = {
.addr1 = 0xffff,
.addr2 = 0xffff
},
[MTD_UADDR_0x0555_0x02AA] = {
.addr1 = 0x0555,
.addr2 = 0x02aa
},
[MTD_UADDR_0x0555_0x0AAA] = {
.addr1 = 0x0555,
.addr2 = 0x0aaa
},
[MTD_UADDR_0x5555_0x2AAA] = {
.addr1 = 0x5555,
.addr2 = 0x2aaa
},
[MTD_UADDR_0x0AAA_0x0555] = {
.addr1 = 0x0AAA,
.addr2 = 0x0555
},
[MTD_UADDR_DONT_CARE] = {
.addr1 = 0x0000, /* Doesn't matter which address */
.addr2 = 0x0000 /* is used - must be last entry */
},
[MTD_UADDR_UNNECESSARY] = {
.addr1 = 0x0000,
.addr2 = 0x0000
}
};
struct amd_flash_info {
const __u16 mfr_id;
const __u16 dev_id;
const char *name;
const int DevSize;
const int NumEraseRegions;
const int CmdSet;
const __u8 uaddr[4]; /* unlock addrs for 8, 16, 32, 64 */
const ulong regions[6];
};
#define ERASEINFO(size,blocks) (size<<8)|(blocks-1)
#define SIZE_64KiB 16
#define SIZE_128KiB 17
#define SIZE_256KiB 18
#define SIZE_512KiB 19
#define SIZE_1MiB 20
#define SIZE_2MiB 21
#define SIZE_4MiB 22
#define SIZE_8MiB 23
static const struct amd_flash_info jedec_table[] = {
#ifdef CFG_FLASH_LEGACY_256Kx8
{
.mfr_id = MANUFACTURER_SST,
.dev_id = SST39LF020,
.name = "SST 39LF020",
.uaddr = {
[0] = MTD_UADDR_0x5555_0x2AAA /* x8 */
},
.DevSize = SIZE_256KiB,
.CmdSet = P_ID_AMD_STD,
.NumEraseRegions= 1,
.regions = {
ERASEINFO(0x01000,64),
}
},
#endif
#ifdef CFG_FLASH_LEGACY_512Kx8
{
.mfr_id = MANUFACTURER_AMD,
.dev_id = AM29LV040B,
.name = "AMD AM29LV040B",
.uaddr = {
[0] = MTD_UADDR_0x0555_0x02AA /* x8 */
},
.DevSize = SIZE_512KiB,
.CmdSet = P_ID_AMD_STD,
.NumEraseRegions= 1,
.regions = {
ERASEINFO(0x10000,8),
}
},
{
.mfr_id = MANUFACTURER_SST,
.dev_id = SST39LF040,
.name = "SST 39LF040",
.uaddr = {
[0] = MTD_UADDR_0x5555_0x2AAA /* x8 */
},
.DevSize = SIZE_512KiB,
.CmdSet = P_ID_AMD_STD,
.NumEraseRegions= 1,
.regions = {
ERASEINFO(0x01000,128),
}
},
#endif
#ifdef CFG_FLASH_LEGACY_512Kx16
{
.mfr_id = MANUFACTURER_AMD,
.dev_id = AM29LV400BB,
.name = "AMD AM29LV400BB",
.uaddr = {
[1] = MTD_UADDR_0x0555_0x02AA /* x16 */
},
.DevSize = SIZE_512KiB,
.CmdSet = CFI_CMDSET_AMD_LEGACY,
.NumEraseRegions= 4,
.regions = {
ERASEINFO(0x04000,1),
ERASEINFO(0x02000,2),
ERASEINFO(0x08000,1),
ERASEINFO(0x10000,7),
}
},
#endif
};
static inline void fill_info(flash_info_t *info, const struct amd_flash_info *jedec_entry, ulong base)
{
int i,j;
int sect_cnt;
int size_ratio;
int total_size;
enum uaddr uaddr_idx;
size_ratio = info->portwidth / info->chipwidth;
debug("Found JEDEC Flash: %s\n", jedec_entry->name);
info->vendor = jedec_entry->CmdSet;
/* Todo: do we need device-specific timeouts? */
info->erase_blk_tout = 30000;
info->buffer_write_tout = 1000;
info->write_tout = 100;
info->name = jedec_entry->name;
/* copy unlock addresses from device table to CFI info struct. This
is just here because the addresses are in the table anyway - if
the flash is not detected due to wrong unlock addresses,
flash_detect_legacy would have to try all of them before we even
get here. */
switch(info->chipwidth) {
case FLASH_CFI_8BIT:
uaddr_idx = jedec_entry->uaddr[0];
break;
case FLASH_CFI_16BIT:
uaddr_idx = jedec_entry->uaddr[1];
break;
case FLASH_CFI_32BIT:
uaddr_idx = jedec_entry->uaddr[2];
break;
default:
uaddr_idx = MTD_UADDR_NOT_SUPPORTED;
break;
}
debug("unlock address index %d\n", uaddr_idx);
info->addr_unlock1 = unlock_addrs[uaddr_idx].addr1;
info->addr_unlock2 = unlock_addrs[uaddr_idx].addr2;
debug("unlock addresses are 0x%x/0x%x\n", info->addr_unlock1, info->addr_unlock2);
sect_cnt = 0;
total_size = 0;
for (i = 0; i < jedec_entry->NumEraseRegions; i++) {
ulong erase_region_size = jedec_entry->regions[i] >> 8;
ulong erase_region_count = (jedec_entry->regions[i] & 0xff) + 1;
total_size += erase_region_size * erase_region_count;
debug ("erase_region_count = %d erase_region_size = %d\n",
erase_region_count, erase_region_size);
for (j = 0; j < erase_region_count; j++) {
if (sect_cnt >= CFG_MAX_FLASH_SECT) {
printf("ERROR: too many flash sectors\n");
break;
}
info->start[sect_cnt] = base;
base += (erase_region_size * size_ratio);
sect_cnt++;
}
}
info->sector_count = sect_cnt;
info->size = total_size * size_ratio;
}
/*-----------------------------------------------------------------------
* match jedec ids against table. If a match is found, fill flash_info entry
*/
int jedec_flash_match(flash_info_t *info, ulong base)
{
int ret = 0;
int i;
ulong mask = 0xFFFF;
if (info->chipwidth == 1)
mask = 0xFF;
for (i = 0; i < ARRAY_SIZE(jedec_table); i++) {
if ((jedec_table[i].mfr_id & mask) == (info->manufacturer_id & mask) &&
(jedec_table[i].dev_id & mask) == (info->device_id & mask)) {
fill_info(info, &jedec_table[i], base);
ret = 1;
break;
}
}
return ret;
}
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