[PATCH 2/2] mtd: cfi_cmdset_0002: add support for Samsung K8D3x16UxC NOR chips

[Guillaume LECERF]

These chips report CFI v3.3 [1], so patch them on the fly to the more
correct v1.3.
Discussed and tested by the OpenWRT people [2].

[1] http://www.samsung.com/global/system/business/semiconductor/product/2007/6/11/NORFlash/32Mbit/K8D3216UBC/ds_K8D3x16UxC_rev17.pdf
[2] https://dev.openwrt.org/ticket/866

Signed-off-by: Guillaume LECERF <glecerf at gmail.com>
---
 drivers/mtd/chips/cfi_cmdset_0002.c |   15 ++++++++++++++-
 1 files changed, 14 insertions(+), 1 deletions(-)

diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c
index 28e05ad..bf015e7 100644
--- a/drivers/mtd/chips/cfi_cmdset_0002.c
+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
@@ -395,7 +395,7 @@ static void cfi_fixup_major_minor(struct cfi_private *cfi,
 	if (cfi->mfr == CFI_MFR_SAMSUNG) {
 		if (extp->MajorVersion == '0') {
 			/*
-			 * Samsung K8P2815UQB and K8D6x16UxM report major=0 / minor=0
+			 * Samsung K8P2815UQB and K8D6x16UxM chips report major=0 / minor=0
 			 */
 			printk("  Fixed Samsung's Amd/Fujitsu Extended Query version from %c.%c to 1.0",
 			       extp->MajorVersion, extp->MinorVersion);
@@ -403,6 +403,19 @@ static void cfi_fixup_major_minor(struct cfi_private *cfi,
 			extp->MajorVersion = '1';
 			extp->MinorVersion = '0';
 		}
+		if (extp->MajorVersion == '3' && extp->MinorVersion == '3') {
+			/*
+			 * Samsung K8D3x16UxC chips report major=3 / minor=3
+			 */
+			printk(KERN_NOTICE "  Newer Samsung flash detected, "
+			                   "should be compatibile with Amd/Fujitsu.\n");
+
+			printk("  Fixed Samsung's Amd/Fujitsu Extended Query version from %c.%c to 1.3",
+			       extp->MajorVersion, extp->MinorVersion);
+
+			extp->MajorVersion = '1'; // set to 1.3
+			extp->MinorVersion = '3';
+		}
 	}
 
 	/*