[PATCH 21/29] pxa3xx_nand: add ext id check

[Lei Wen]

For K9LBG08U0M and K9LBG08UXD two nand chip, they have the same chip id
as
0xd7ec. So we should use the ext id to distinguish them.

Signed-off-by: Lei Wen <leiwen at marvell.com>
---
 arch/arm/plat-pxa/include/plat/pxa3xx_nand.h |    3 +-
 drivers/mtd/nand/pxa3xx_nand.c               |   32 +++++++++++++-------------
 2 files changed, 18 insertions(+), 17 deletions(-)

diff --git a/arch/arm/plat-pxa/include/plat/pxa3xx_nand.h
b/arch/arm/plat-pxa/include/plat/pxa3xx_nand.h
index ed7d623..c20ac35 100644
--- a/arch/arm/plat-pxa/include/plat/pxa3xx_nand.h
+++ b/arch/arm/plat-pxa/include/plat/pxa3xx_nand.h
@@ -37,7 +37,8 @@ struct pxa3xx_nand_cmdset {

 struct pxa3xx_nand_flash {
 	char		*name;
-	uint32_t	chip_id;
+	uint16_t	chip_id;	/* chip id */
+	uint16_t	ext_id;		/* Extend id */
 	uint16_t	page_per_block; /* Pages per block */
 	uint16_t 	page_size;	/* Page size in bytes */
 	uint8_t		flash_width;	/* Width of Flash memory (DWIDTH_M) */
diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c
index 048b576..b0a0ccf 100644
--- a/drivers/mtd/nand/pxa3xx_nand.c
+++ b/drivers/mtd/nand/pxa3xx_nand.c
@@ -253,17 +253,17 @@ static struct pxa3xx_nand_timing __devinitdata
timing[] = {
 #define NAND_SETTING_MICRON      &default_cmdset, &timing[2]
 #define NAND_SETTING_ST          &default_cmdset, &timing[3]
 static struct pxa3xx_nand_flash __devinitdata builtin_flash_types[] = {
-{ "DEFAULT FLASH",      0,   0, 2048,  8,  8, ECC_NONE,      0,
NAND_SETTING_DEFAULT, },
-{ "64MiB 16-bit",  0x46ec,  32,  512, 16, 16, ECC_HAMMIN, 4096,
NAND_SETTING_SAMSUNG, },
-{ "256MiB 8-bit",  0xdaec,  64, 2048,  8,  8, ECC_HAMMIN, 2048,
NAND_SETTING_SAMSUNG, },
-{ "1GiB 8-bit",    0xd3ec, 128, 2048,  8,  8, ECC_BCH,    4096,
NAND_SETTING_SAMSUNG, },
-{ "4GiB 8-bit",    0xd7ec, 128, 4096,  8,  8, ECC_BCH,    8192,
NAND_SETTING_SAMSUNG, },
-{ "128MiB 8-bit",  0xa12c,  64, 2048,  8,  8, ECC_HAMMIN, 1024,
NAND_SETTING_MICRON, },
-{ "128MiB 16-bit", 0xb12c,  64, 2048, 16, 16, ECC_HAMMIN, 1024,
NAND_SETTING_MICRON, },
-{ "512MiB 8-bit",  0xdc2c,  64, 2048,  8,  8, ECC_HAMMIN, 4096,
NAND_SETTING_MICRON, },
-{ "512MiB 16-bit", 0xcc2c,  64, 2048, 16, 16, ECC_HAMMIN, 4096,
NAND_SETTING_MICRON, },
-{ "1GiB 8-bit",    0x382c, 128, 4096,  8,  8, ECC_BCH,    2048,
NAND_SETTING_MICRON },
-{ "256MiB 16-bit", 0xba20,  64, 2048, 16, 16, ECC_HAMMIN, 2048,
NAND_SETTING_ST, },
+{ "DEFAULT FLASH",      0,       0,  0, 2048,  8,  8, ECC_NONE,
0, NAND_SETTING_DEFAULT, },
+{ "64MiB 16-bit",  0x46ec, 0xffff,  32,  512, 16, 16, ECC_HAMMIN,
4096, NAND_SETTING_SAMSUNG, },
+{ "256MiB 8-bit",  0xdaec, 0xffff,  64, 2048,  8,  8, ECC_HAMMIN,
2048, NAND_SETTING_SAMSUNG, },
+{ "1GiB 8-bit",    0xd3ec, 0xffff, 128, 2048,  8,  8, ECC_BCH,
4096, NAND_SETTING_SAMSUNG, },
+{ "4GiB 8-bit",    0xd7ec, 0x29d5, 128, 4096,  8,  8, ECC_BCH,
8192, NAND_SETTING_SAMSUNG, },
+{ "128MiB 8-bit",  0xa12c, 0xffff,  64, 2048,  8,  8, ECC_HAMMIN,
1024, NAND_SETTING_MICRON, },
+{ "128MiB 16-bit", 0xb12c, 0xffff,  64, 2048, 16, 16, ECC_HAMMIN,
1024, NAND_SETTING_MICRON, },
+{ "512MiB 8-bit",  0xdc2c, 0xffff,  64, 2048,  8,  8, ECC_HAMMIN,
4096, NAND_SETTING_MICRON, },
+{ "512MiB 16-bit", 0xcc2c, 0xffff,  64, 2048, 16, 16, ECC_HAMMIN,
4096, NAND_SETTING_MICRON, },
+{ "1GiB 8-bit",    0x382c, 0xffff, 128, 4096,  8,  8, ECC_BCH,
2048, NAND_SETTING_MICRON },
+{ "256MiB 16-bit", 0xba20, 0xffff,  64, 2048, 16, 16, ECC_HAMMIN,
2048, NAND_SETTING_ST, },
 };

 static const char *mtd_names[] = {"pxa3xx_nand-0", "pxa3xx_nand-1", NULL};
@@ -1209,7 +1209,7 @@ static int __devinit pxa3xx_nand_scan(struct
mtd_info *mtd)
 	struct nand_flash_dev pxa3xx_flash_ids[2] = {{NULL,}, {NULL,}};
 	const struct pxa3xx_nand_flash *f = NULL;
 	struct nand_chip *chip = mtd->priv;
-	uint32_t id = -1;
+	uint16_t id[2];
 	uint64_t chipsize;
 	int i, ret;

@@ -1225,10 +1225,10 @@ static int __devinit pxa3xx_nand_scan(struct
mtd_info *mtd)
 		return -EINVAL;
 	}

-	nand->data_buff = (unsigned char *)&id;
+	nand->data_buff = (unsigned char *)id;
 	chip->cmdfunc(mtd, NAND_CMD_READID, 0, 0);
-	if (id != 0)
-		dev_info(&nand->pdev->dev, "Detect a flash id %x\n", id);
+	if (id[0] != 0)
+		dev_info(&nand->pdev->dev, "Detect a flash id %x\n", id[0]);
 	else {
 		dev_warn(&nand->pdev->dev, "Read out ID 0, potential timing set wrong!!\n");
 		free_cs_resource(info, nand->chip_select);
@@ -1242,7 +1242,7 @@ static int __devinit pxa3xx_nand_scan(struct
mtd_info *mtd)
 			f = &builtin_flash_types[i - pdata->num_flash + 1];

 		/* find the chip in default list */
-		if (f->chip_id == id)
+		if ((f->chip_id == id[0]) && ((f->ext_id & id[1]) == id[1]))
 			break;
 	}

-- 
1.7.0.4