driver/mtd/IFC: Add support of 8K page size NAND flash

Current IFC driver supports till 4K page size NAND flash.
Add support of 8K Page size NAND flash
  - Add nand_ecclayout for 4 bit & 8 bit ecc
  - Defines constants
  - also fix ecc.strength for 8bit ecc of 8K page size NAND

Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

diff --git a/arch/powerpc/include/asm/fsl_ifc.h b/arch/powerpc/include/asm/fsl_ifc.h
index b8a4b9bc50b326b07efda9e6f82e59e16be3e318..f49ddb1b2273b0d46e1cbf07ca434287a42e3cca 100644 (file)
--- a/arch/powerpc/include/asm/fsl_ifc.h
+++ b/arch/powerpc/include/asm/fsl_ifc.h
@@ -93,6 +93,7 @@
 #define CSOR_NAND_PGS_512              0x00000000
 #define CSOR_NAND_PGS_2K               0x00080000
 #define CSOR_NAND_PGS_4K               0x00100000
+#define CSOR_NAND_PGS_8K               0x00180000
 /* Spare region Size */
 #define CSOR_NAND_SPRZ_MASK            0x0000E000
 #define CSOR_NAND_SPRZ_SHIFT           13
@@ -102,6 +103,7 @@
 #define CSOR_NAND_SPRZ_210             0x00006000
 #define CSOR_NAND_SPRZ_218             0x00008000
 #define CSOR_NAND_SPRZ_224             0x0000A000
+#define CSOR_NAND_SPRZ_CSOR_EXT                0x0000C000
 /* Pages Per Block */
 #define CSOR_NAND_PB_MASK              0x00000700
 #define CSOR_NAND_PB_SHIFT             8

diff --git a/drivers/mtd/nand/fsl_ifc_nand.c b/drivers/mtd/nand/fsl_ifc_nand.c
index 1c173d91cbea11d086ac8f3cf46324e65c960e36..9d1cf005878fece2b60ade3b17a5fad317a59238 100644 (file)
--- a/drivers/mtd/nand/fsl_ifc_nand.c
+++ b/drivers/mtd/nand/fsl_ifc_nand.c
@@ -135,6 +135,69 @@ static struct nand_ecclayout oob_4096_ecc8 = {
        .oobfree = { {2, 6}, {136, 82} },
 };
 
+/* 8192-byte page size with 4-bit ECC */
+static struct nand_ecclayout oob_8192_ecc4 = {
+       .eccbytes = 128,
+       .eccpos = {
+               8, 9, 10, 11, 12, 13, 14, 15,
+               16, 17, 18, 19, 20, 21, 22, 23,
+               24, 25, 26, 27, 28, 29, 30, 31,
+               32, 33, 34, 35, 36, 37, 38, 39,
+               40, 41, 42, 43, 44, 45, 46, 47,
+               48, 49, 50, 51, 52, 53, 54, 55,
+               56, 57, 58, 59, 60, 61, 62, 63,
+               64, 65, 66, 67, 68, 69, 70, 71,
+               72, 73, 74, 75, 76, 77, 78, 79,
+               80, 81, 82, 83, 84, 85, 86, 87,
+               88, 89, 90, 91, 92, 93, 94, 95,
+               96, 97, 98, 99, 100, 101, 102, 103,
+               104, 105, 106, 107, 108, 109, 110, 111,
+               112, 113, 114, 115, 116, 117, 118, 119,
+               120, 121, 122, 123, 124, 125, 126, 127,
+               128, 129, 130, 131, 132, 133, 134, 135,
+       },
+       .oobfree = { {2, 6}, {136, 208} },
+};
+
+/* 8192-byte page size with 8-bit ECC -- requires 218-byte OOB */
+static struct nand_ecclayout oob_8192_ecc8 = {
+       .eccbytes = 256,
+       .eccpos = {
+               8, 9, 10, 11, 12, 13, 14, 15,
+               16, 17, 18, 19, 20, 21, 22, 23,
+               24, 25, 26, 27, 28, 29, 30, 31,
+               32, 33, 34, 35, 36, 37, 38, 39,
+               40, 41, 42, 43, 44, 45, 46, 47,
+               48, 49, 50, 51, 52, 53, 54, 55,
+               56, 57, 58, 59, 60, 61, 62, 63,
+               64, 65, 66, 67, 68, 69, 70, 71,
+               72, 73, 74, 75, 76, 77, 78, 79,
+               80, 81, 82, 83, 84, 85, 86, 87,
+               88, 89, 90, 91, 92, 93, 94, 95,
+               96, 97, 98, 99, 100, 101, 102, 103,
+               104, 105, 106, 107, 108, 109, 110, 111,
+               112, 113, 114, 115, 116, 117, 118, 119,
+               120, 121, 122, 123, 124, 125, 126, 127,
+               128, 129, 130, 131, 132, 133, 134, 135,
+               136, 137, 138, 139, 140, 141, 142, 143,
+               144, 145, 146, 147, 148, 149, 150, 151,
+               152, 153, 154, 155, 156, 157, 158, 159,
+               160, 161, 162, 163, 164, 165, 166, 167,
+               168, 169, 170, 171, 172, 173, 174, 175,
+               176, 177, 178, 179, 180, 181, 182, 183,
+               184, 185, 186, 187, 188, 189, 190, 191,
+               192, 193, 194, 195, 196, 197, 198, 199,
+               200, 201, 202, 203, 204, 205, 206, 207,
+               208, 209, 210, 211, 212, 213, 214, 215,
+               216, 217, 218, 219, 220, 221, 222, 223,
+               224, 225, 226, 227, 228, 229, 230, 231,
+               232, 233, 234, 235, 236, 237, 238, 239,
+               240, 241, 242, 243, 244, 245, 246, 247,
+               248, 249, 250, 251, 252, 253, 254, 255,
+               256, 257, 258, 259, 260, 261, 262, 263,
+       },
+       .oobfree = { {2, 6}, {264, 80} },
+};
 
 /*
  * Generic flash bbt descriptors
@@ -870,11 +933,25 @@ static int fsl_ifc_chip_init(struct fsl_ifc_mtd *priv)
                } else {
                        layout = &oob_4096_ecc8;
                        chip->ecc.bytes = 16;
+                       chip->ecc.strength = 8;
                }
 
                priv->bufnum_mask = 1;
                break;
 
+       case CSOR_NAND_PGS_8K:
+               if ((csor & CSOR_NAND_ECC_MODE_MASK) ==
+                   CSOR_NAND_ECC_MODE_4) {
+                       layout = &oob_8192_ecc4;
+               } else {
+                       layout = &oob_8192_ecc8;
+                       chip->ecc.bytes = 16;
+                       chip->ecc.strength = 8;
+               }
+
+               priv->bufnum_mask = 0;
+       break;
+
        default:
                dev_err(priv->dev, "bad csor %#x: bad page size\n", csor);
                return -ENODEV;