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-rw-r--r--drivers/mtd/Makefile1
-rw-r--r--drivers/mtd/cfi_flash.c110
-rw-r--r--drivers/mtd/jedec_flash.c312
3 files changed, 411 insertions, 12 deletions
diff --git a/drivers/mtd/Makefile b/drivers/mtd/Makefile
index 95c5e02..952e919 100644
--- a/drivers/mtd/Makefile
+++ b/drivers/mtd/Makefile
@@ -29,6 +29,7 @@ COBJS-y += at45.o
COBJS-y += cfi_flash.o
COBJS-y += dataflash.o
COBJS-y += mw_eeprom.o
+COBJS-$(CONFIG_FLASH_CFI_LEGACY) += jedec_flash.o
COBJS := $(COBJS-y)
SRCS := $(COBJS:.o=.c)
diff --git a/drivers/mtd/cfi_flash.c b/drivers/mtd/cfi_flash.c
index 5579a1e..66754cd 100644
--- a/drivers/mtd/cfi_flash.c
+++ b/drivers/mtd/cfi_flash.c
@@ -98,10 +98,6 @@
#define AMD_STATUS_TOGGLE 0x40
#define AMD_STATUS_ERROR 0x20
-#define AMD_ADDR_ERASE_START ((info->portwidth == FLASH_CFI_8BIT) ? 0xAAA : 0x555)
-#define AMD_ADDR_START ((info->portwidth == FLASH_CFI_8BIT) ? 0xAAA : 0x555)
-#define AMD_ADDR_ACK ((info->portwidth == FLASH_CFI_8BIT) ? 0x555 : 0x2AA)
-
#define FLASH_OFFSET_MANUFACTURER_ID 0x00
#define FLASH_OFFSET_DEVICE_ID 0x01
#define FLASH_OFFSET_DEVICE_ID2 0x0E
@@ -331,6 +327,62 @@ ulong flash_read_long (flash_info_t * info, flash_sect_t sect, uint offset)
}
+#ifdef CONFIG_FLASH_CFI_LEGACY
+/*-----------------------------------------------------------------------
+ * Call board code to request info about non-CFI flash.
+ * board_flash_get_legacy needs to fill in at least:
+ * info->portwidth, info->chipwidth and info->interface for Jedec probing.
+ */
+int flash_detect_legacy(ulong base, int banknum)
+{
+ flash_info_t *info = &flash_info[banknum];
+ if (board_flash_get_legacy(base, banknum, info)) {
+ /* board code may have filled info completely. If not, we
+ use JEDEC ID probing. */
+ if (!info->vendor) {
+ int modes[] = { CFI_CMDSET_AMD_STANDARD, CFI_CMDSET_INTEL_STANDARD };
+ int i;
+
+ for(i=0; i<sizeof(modes)/sizeof(modes[0]); i++) {
+ info->vendor = modes[i];
+ info->start[0] = base;
+ if (info->portwidth == FLASH_CFI_8BIT && info->interface == FLASH_CFI_X8X16) {
+ info->addr_unlock1 = 0x2AAA;
+ info->addr_unlock2 = 0x5555;
+ } else {
+ info->addr_unlock1 = 0x5555;
+ info->addr_unlock2 = 0x2AAA;
+ }
+ flash_read_jedec_ids(info);
+ debug("JEDEC PROBE: ID %x %x %x\n", info->manufacturer_id, info->device_id, info->device_id2);
+ if (jedec_flash_match(info, base))
+ break;
+ }
+ }
+ switch(info->vendor) {
+ case CFI_CMDSET_INTEL_STANDARD:
+ case CFI_CMDSET_INTEL_EXTENDED:
+ info->cmd_reset = FLASH_CMD_RESET;
+ break;
+ case CFI_CMDSET_AMD_STANDARD:
+ case CFI_CMDSET_AMD_EXTENDED:
+ case CFI_CMDSET_AMD_LEGACY:
+ info->cmd_reset = AMD_CMD_RESET;
+ break;
+ }
+ info->flash_id = FLASH_MAN_CFI;
+ return 1;
+ }
+ return 0; /* use CFI */
+}
+#else
+int inline flash_detect_legacy(ulong base, int banknum)
+{
+ return 0; /* use CFI */
+}
+#endif
+
+
/*-----------------------------------------------------------------------
*/
unsigned long flash_init (void)
@@ -345,7 +397,10 @@ unsigned long flash_init (void)
/* Init: no FLASHes known */
for (i = 0; i < CFG_MAX_FLASH_BANKS; ++i) {
flash_info[i].flash_id = FLASH_UNKNOWN;
- size += flash_info[i].size = flash_get_size (bank_base[i], i);
+
+ if (!flash_detect_legacy (bank_base[i], i))
+ flash_get_size (bank_base[i], i);
+ size += flash_info[i].size;
if (flash_info[i].flash_id == FLASH_UNKNOWN) {
#ifndef CFG_FLASH_QUIET_TEST
printf ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",
@@ -483,11 +538,18 @@ int flash_erase (flash_info_t * info, int s_first, int s_last)
case CFI_CMDSET_AMD_STANDARD:
case CFI_CMDSET_AMD_EXTENDED:
flash_unlock_seq (info, sect);
- flash_write_cmd (info, sect, AMD_ADDR_ERASE_START,
- AMD_CMD_ERASE_START);
+ flash_write_cmd (info, sect, info->addr_unlock1, AMD_CMD_ERASE_START);
flash_unlock_seq (info, sect);
flash_write_cmd (info, sect, 0, AMD_CMD_ERASE_SECTOR);
break;
+#ifdef CONFIG_FLASH_CFI_LEGACY
+ case CFI_CMDSET_AMD_LEGACY:
+ flash_unlock_seq (info, 0);
+ flash_write_cmd (info, 0, info->addr_unlock1, AMD_CMD_ERASE_START);
+ flash_unlock_seq (info, 0);
+ flash_write_cmd (info, sect, 0, AMD_CMD_ERASE_SECTOR);
+ break;
+#endif
default:
debug ("Unkown flash vendor %d\n",
info->vendor);
@@ -516,8 +578,13 @@ void flash_print_info (flash_info_t * info)
return;
}
- printf ("CFI conformant FLASH (%d x %d)",
+ printf ("%s FLASH (%d x %d)",
+ info->name,
(info->portwidth << 3), (info->chipwidth << 3));
+ if (info->size < 1024*1024)
+ printf (" Size: %ld kB in %d Sectors\n",
+ info->size >> 10, info->sector_count);
+ else
printf (" Size: %ld MB in %d Sectors\n",
info->size >> 20, info->sector_count);
printf (" ");
@@ -534,6 +601,11 @@ void flash_print_info (flash_info_t * info)
case CFI_CMDSET_AMD_EXTENDED:
printf ("AMD Extended");
break;
+#ifdef CONFIG_FLASH_CFI_LEGACY
+ case CFI_CMDSET_AMD_LEGACY:
+ printf ("AMD Legacy");
+ break;
+#endif
default:
printf ("Unknown (%d)", info->vendor);
break;
@@ -777,6 +849,9 @@ static int flash_is_busy (flash_info_t * info, flash_sect_t sect)
break;
case CFI_CMDSET_AMD_STANDARD:
case CFI_CMDSET_AMD_EXTENDED:
+#ifdef CONFIG_FLASH_CFI_LEGACY
+ case CFI_CMDSET_AMD_LEGACY:
+#endif
retval = flash_toggle (info, sect, 0, AMD_STATUS_TOGGLE);
break;
default:
@@ -967,8 +1042,8 @@ static void flash_write_cmd (flash_info_t * info, flash_sect_t sect, uint offset
static void flash_unlock_seq (flash_info_t * info, flash_sect_t sect)
{
- flash_write_cmd (info, sect, AMD_ADDR_START, AMD_CMD_UNLOCK_START);
- flash_write_cmd (info, sect, AMD_ADDR_ACK, AMD_CMD_UNLOCK_ACK);
+ flash_write_cmd (info, sect, info->addr_unlock1, AMD_CMD_UNLOCK_START);
+ flash_write_cmd (info, sect, info->addr_unlock2, AMD_CMD_UNLOCK_ACK);
}
/*-----------------------------------------------------------------------
@@ -1105,7 +1180,7 @@ static void flash_read_jedec_ids (flash_info_t * info)
case CFI_CMDSET_AMD_EXTENDED:
flash_write_cmd(info, 0, 0, AMD_CMD_RESET);
flash_unlock_seq(info, 0);
- flash_write_cmd(info, 0, AMD_ADDR_START, FLASH_CMD_READ_ID);
+ flash_write_cmd(info, 0, info->addr_unlock1, FLASH_CMD_READ_ID);
udelay(1000); /* some flash are slow to respond */
info->manufacturer_id = flash_read_uchar (info,
FLASH_OFFSET_MANUFACTURER_ID);
@@ -1156,6 +1231,10 @@ static int flash_detect_cfi (flash_info_t * info)
debug ("port %d bits chip %d bits\n",
info->portwidth << CFI_FLASH_SHIFT_WIDTH,
info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
+ /* this probably only works if info->interface == FLASH_CFI_X8X16 */
+ info->addr_unlock1 = (info->portwidth == FLASH_CFI_8BIT) ? 0xAAA : 0x555;
+ info->addr_unlock2 = (info->portwidth == FLASH_CFI_8BIT) ? 0x555 : 0x2AA;
+ info->name = "CFI conformant";
return 1;
}
}
@@ -1282,6 +1361,10 @@ ulong flash_get_size (ulong base, int banknum)
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] = sector;
sector += (erase_region_size * size_ratio);
@@ -1384,8 +1467,11 @@ static int flash_write_cfiword (flash_info_t * info, ulong dest,
break;
case CFI_CMDSET_AMD_EXTENDED:
case CFI_CMDSET_AMD_STANDARD:
+#ifdef CONFIG_FLASH_CFI_LEGACY
+ case CFI_CMDSET_AMD_LEGACY:
+#endif
flash_unlock_seq (info, 0);
- flash_write_cmd (info, 0, AMD_ADDR_START, AMD_CMD_WRITE);
+ flash_write_cmd (info, 0, info->addr_unlock1, AMD_CMD_WRITE);
break;
}
diff --git a/drivers/mtd/jedec_flash.c b/drivers/mtd/jedec_flash.c
new file mode 100644
index 0000000..719ad20
--- /dev/null
+++ b/drivers/mtd/jedec_flash.c
@@ -0,0 +1,312 @@
+/*
+ * (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
+};
+
+
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
+
+
+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;
+}
+
generated by cgit v1.1 at 2024-12-12 19:02:04 +0000