Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=de7921f01a407e0cb38143363995db89a5f9a5c5
Commit: de7921f01a407e0cb38143363995db89a5f9a5c5
Parent: 78b65179d08e7e4466ba69d5ede85035a2c96358
Author: Bartlomiej Sieka <[EMAIL PROTECTED]>
AuthorDate: Mon Nov 26 18:55:18 2007 +0100
Committer: David Woodhouse <[EMAIL PROTECTED]>
CommitDate: Thu Jan 10 22:07:12 2008 +0000
[MTD] [NOR] Fix incorrect interface code for x16/x32 chips
According to "Common Flash Memory Interface Publication 100" dated December
1,
2001, the interface code for x16/x32 chips is 0x0005, and not 0x0004 used so
far.
Signed-off-by: Bartlomiej Sieka <[EMAIL PROTECTED]>
Signed-off-by: David Woodhouse <[EMAIL PROTECTED]>
---
drivers/mtd/chips/cfi_cmdset_0002.c | 6 ++++--
drivers/mtd/chips/cfi_probe.c | 12 ++++++------
drivers/mtd/maps/scb2_flash.c | 2 +-
include/linux/mtd/cfi.h | 12 ++++++++++++
4 files changed, 23 insertions(+), 9 deletions(-)
diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c
b/drivers/mtd/chips/cfi_cmdset_0002.c
index 571226e..796bfea 100644
--- a/drivers/mtd/chips/cfi_cmdset_0002.c
+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
@@ -342,10 +342,12 @@ struct mtd_info *cfi_cmdset_0002(struct map_info *map,
int primary)
/* Modify the unlock address if we are in compatibility mode */
if ( /* x16 in x8 mode */
((cfi->device_type == CFI_DEVICETYPE_X8) &&
- (cfi->cfiq->InterfaceDesc == 2)) ||
+ (cfi->cfiq->InterfaceDesc ==
+ CFI_INTERFACE_X8_BY_X16_ASYNC)) ||
/* x32 in x16 mode */
((cfi->device_type == CFI_DEVICETYPE_X16) &&
- (cfi->cfiq->InterfaceDesc == 4)))
+ (cfi->cfiq->InterfaceDesc ==
+ CFI_INTERFACE_X16_BY_X32_ASYNC)))
{
cfi->addr_unlock1 = 0xaaa;
cfi->addr_unlock2 = 0x555;
diff --git a/drivers/mtd/chips/cfi_probe.c b/drivers/mtd/chips/cfi_probe.c
index 60e11a0..f651b6e 100644
--- a/drivers/mtd/chips/cfi_probe.c
+++ b/drivers/mtd/chips/cfi_probe.c
@@ -370,27 +370,27 @@ static void print_cfi_ident(struct cfi_ident *cfip)
printk("Device size: 0x%X bytes (%d MiB)\n", 1 << cfip->DevSize, 1<<
(cfip->DevSize - 20));
printk("Flash Device Interface description: 0x%4.4X\n",
cfip->InterfaceDesc);
switch(cfip->InterfaceDesc) {
- case 0:
+ case CFI_INTERFACE_X8_ASYNC:
printk(" - x8-only asynchronous interface\n");
break;
- case 1:
+ case CFI_INTERFACE_X16_ASYNC:
printk(" - x16-only asynchronous interface\n");
break;
- case 2:
+ case CFI_INTERFACE_X8_BY_X16_ASYNC:
printk(" - supports x8 and x16 via BYTE# with asynchronous
interface\n");
break;
- case 3:
+ case CFI_INTERFACE_X32_ASYNC:
printk(" - x32-only asynchronous interface\n");
break;
- case 4:
+ case CFI_INTERFACE_X16_BY_X32_ASYNC:
printk(" - supports x16 and x32 via Word# with asynchronous
interface\n");
break;
- case 65535:
+ case CFI_INTERFACE_NOT_ALLOWED:
printk(" - Not Allowed / Reserved\n");
break;
diff --git a/drivers/mtd/maps/scb2_flash.c b/drivers/mtd/maps/scb2_flash.c
index dcfb858..0fc5584 100644
--- a/drivers/mtd/maps/scb2_flash.c
+++ b/drivers/mtd/maps/scb2_flash.c
@@ -79,7 +79,7 @@ scb2_fixup_mtd(struct mtd_info *mtd)
struct cfi_private *cfi = map->fldrv_priv;
/* barf if this doesn't look right */
- if (cfi->cfiq->InterfaceDesc != 1) {
+ if (cfi->cfiq->InterfaceDesc != CFI_INTERFACE_X16_ASYNC) {
printk(KERN_ERR MODNAME ": unsupported InterfaceDesc: %#x\n",
cfi->cfiq->InterfaceDesc);
return -1;
diff --git a/include/linux/mtd/cfi.h b/include/linux/mtd/cfi.h
index e17c534..b0ddf4b 100644
--- a/include/linux/mtd/cfi.h
+++ b/include/linux/mtd/cfi.h
@@ -98,6 +98,18 @@ static inline int cfi_interleave_supported(int i)
#define CFI_DEVICETYPE_X32 (32 / 8)
#define CFI_DEVICETYPE_X64 (64 / 8)
+
+/* Device Interface Code Assignments from the "Common Flash Memory Interface
+ * Publication 100" dated December 1, 2001.
+ */
+#define CFI_INTERFACE_X8_ASYNC 0x0000
+#define CFI_INTERFACE_X16_ASYNC 0x0001
+#define CFI_INTERFACE_X8_BY_X16_ASYNC 0x0002
+#define CFI_INTERFACE_X32_ASYNC 0x0003
+#define CFI_INTERFACE_X16_BY_X32_ASYNC 0x0005
+#define CFI_INTERFACE_NOT_ALLOWED 0xffff
+
+
/* NB: We keep these structures in memory in HOST byteorder, except
* where individually noted.
*/
-
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