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Add Eon EN29SL800 flash

PATCH New Mike Rapoport 1 participant 1 message Sep 11, 2007 Memory technology devices (MTD)

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Mike Rapoport

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PATCH 1/1 Add Eon EN29SL800 flash

This patch adds support for Eon EN29SL800 flashes

Signed-off-by Mike Rapoport <[email protected]>
 drivers/mtd/chips/jedec_probe.c |   58 ++++++++++++++++++++++++++++++++++++---
 1 files changed, 54 insertions(+), 4 deletions(-)
drivers/mtd/chips/jedec_probe.c +39 -1
index 58e561e..7050e71 100644
@@ -38,7 +38,7 @@
 #define MANUFACTURER_ST		0x0020
 #define MANUFACTURER_TOSHIBA	0x0098
 #define MANUFACTURER_WINBOND	0x00da
-
+#define CONTINUATION_CODE	0x007f
 
 /* AMD */
 #define AM29DL800BB	0x22C8

@@ -68,6 +68,10 @@
 #define AT49BV32X	0x00C8
 #define AT49BV32XT	0x00C9
 
+/* Eon */
+#define EN29SL800BB	0x226B
+#define EN29SL800BT	0x22EA
+
 /* Fujitsu */
 #define MBM29F040C	0x00A4
 #define MBM29LV650UE	0x22D7

@@ -632,6 +636,40 @@ static const struct amd_flash_info jedec_table[] = {
 			ERASEINFO(0x02000,8)
 		}
 	}, {
+		.mfr_id		= 0x1c,
+		.dev_id		= EN29SL800BT,
+		.name		= "Eon EN29SL800BT",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0555_0x02AA,  /* x8 */
+			[1] = MTD_UADDR_0x0555_0x02AA,  /* x16 */
+		},
+		.DevSize	= SIZE_1MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 4,
+		.regions	= {
+			ERASEINFO(0x10000, 15),
+			ERASEINFO(0x08000, 1),
+			ERASEINFO(0x02000, 2),
+			ERASEINFO(0x04000, 1),
+		}
+	}, {
+		.mfr_id		= 0x1c,
+		.dev_id		= EN29SL800BB,
+		.name		= "Eon EN29SL800BB",
+		.uaddr		= {
+			[0] = MTD_UADDR_0x0555_0x02AA,  /* x8 */
+			[1] = MTD_UADDR_0x0555_0x02AA,  /* x16 */
+		},
+		.DevSize	= SIZE_1MiB,
+		.CmdSet		= P_ID_AMD_STD,
+		.NumEraseRegions= 4,
+		.regions	= {
+			ERASEINFO(0x04000, 1),
+			ERASEINFO(0x02000, 2),
+			ERASEINFO(0x08000, 1),
+			ERASEINFO(0x10000, 15),
+		}
+	}, {
 		.mfr_id		= MANUFACTURER_FUJITSU,
 		.dev_id		= MBM29F040C,
 		.name		= "Fujitsu MBM29F040C",

@@ -1769,9 +1807,21 @@ static inline u32 jedec_read_mfr(struct map_info *map,

__u32 base,
{
map_word result;
unsigned long mask;
- u32 ofs = cfi_build_cmd_addr(0, cfi_interleave(cfi), cfi->device_type);
- mask = (1 << (cfi->device_type * 8)) -1;
- result = map_read(map, base + ofs);
+ int bank = 0;
+
+ /* According to JEDEC "Standard Manufacturer's Identification Code"
+ * (http://www.jedec.org/download/search/jep106W.pdf)
+ * several first banks can contain 0x7f instead of actual ID
+ */
+ do {
+ u32 ofs = cfi_build_cmd_addr(0 + (bank << 8),
+ cfi_interleave(cfi),
+ cfi->device_type);
+ mask = (1 << (cfi->device_type * 8)) -1;
+ result = map_read(map, base + ofs);
+ bank++;
+ } while ((result.x[0] & mask) == CONTINUATION_CODE);
+
return result.x[0] & mask;
}