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authorMichael Schwingen <michael@schwingen.org>2007-12-07 23:35:02 +0100
committerStefan Roese <sr@denx.de>2007-12-08 08:16:50 +0100
commit81b20ccc2d795ae9a1199db5a50ad9c28d1e4d22 (patch)
treee868eac227ddea35a626f01c894918c0776eb781 /drivers/mtd/cfi_flash.c
parent41be969f4957115ed7b1fe8b890bfaee99d7a7a2 (diff)
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CFI: support JEDEC flash roms in CFI-flash framework
The following patch adds support for non-CFI flash ROMS, by hooking into the CFI flash code and using most of its code, as recently discussed here in the thread "Mixing CFI and non-CFI flashs". Signed-off-by: Michael Schwingen <michael@schwingen.org> Signed-off-by: Stefan Roese <sr@denx.de>
Diffstat (limited to 'drivers/mtd/cfi_flash.c')
-rw-r--r--drivers/mtd/cfi_flash.c110
1 files changed, 98 insertions, 12 deletions
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;
}