#include <linux/amba/bus.h>
#include <mtd/mtd-abi.h>
-static struct nand_ecclayout fsmc_ecc1_layout = {
+static struct nand_ecclayout fsmc_ecc1_128_layout = {
.eccbytes = 24,
.eccpos = {2, 3, 4, 18, 19, 20, 34, 35, 36, 50, 51, 52,
66, 67, 68, 82, 83, 84, 98, 99, 100, 114, 115, 116},
}
};
-static struct nand_ecclayout fsmc_ecc4_lp_layout = {
+static struct nand_ecclayout fsmc_ecc1_64_layout = {
+ .eccbytes = 12,
+ .eccpos = {2, 3, 4, 18, 19, 20, 34, 35, 36, 50, 51, 52},
+ .oobfree = {
+ {.offset = 8, .length = 8},
+ {.offset = 24, .length = 8},
+ {.offset = 40, .length = 8},
+ {.offset = 56, .length = 8},
+ }
+};
+
+static struct nand_ecclayout fsmc_ecc1_16_layout = {
+ .eccbytes = 3,
+ .eccpos = {2, 3, 4},
+ .oobfree = {
+ {.offset = 8, .length = 8},
+ }
+};
+
+/*
+ * ECC4 layout for NAND of pagesize 8192 bytes & OOBsize 256 bytes. 13*16 bytes
+ * of OB size is reserved for ECC, Byte no. 0 & 1 reserved for bad block and 46
+ * bytes are free for use.
+ */
+static struct nand_ecclayout fsmc_ecc4_256_layout = {
+ .eccbytes = 208,
+ .eccpos = { 2, 3, 4, 5, 6, 7, 8,
+ 9, 10, 11, 12, 13, 14,
+ 18, 19, 20, 21, 22, 23, 24,
+ 25, 26, 27, 28, 29, 30,
+ 34, 35, 36, 37, 38, 39, 40,
+ 41, 42, 43, 44, 45, 46,
+ 50, 51, 52, 53, 54, 55, 56,
+ 57, 58, 59, 60, 61, 62,
+ 66, 67, 68, 69, 70, 71, 72,
+ 73, 74, 75, 76, 77, 78,
+ 82, 83, 84, 85, 86, 87, 88,
+ 89, 90, 91, 92, 93, 94,
+ 98, 99, 100, 101, 102, 103, 104,
+ 105, 106, 107, 108, 109, 110,
+ 114, 115, 116, 117, 118, 119, 120,
+ 121, 122, 123, 124, 125, 126,
+ 130, 131, 132, 133, 134, 135, 136,
+ 137, 138, 139, 140, 141, 142,
+ 146, 147, 148, 149, 150, 151, 152,
+ 153, 154, 155, 156, 157, 158,
+ 162, 163, 164, 165, 166, 167, 168,
+ 169, 170, 171, 172, 173, 174,
+ 178, 179, 180, 181, 182, 183, 184,
+ 185, 186, 187, 188, 189, 190,
+ 194, 195, 196, 197, 198, 199, 200,
+ 201, 202, 203, 204, 205, 206,
+ 210, 211, 212, 213, 214, 215, 216,
+ 217, 218, 219, 220, 221, 222,
+ 226, 227, 228, 229, 230, 231, 232,
+ 233, 234, 235, 236, 237, 238,
+ 242, 243, 244, 245, 246, 247, 248,
+ 249, 250, 251, 252, 253, 254
+ },
+ .oobfree = {
+ {.offset = 15, .length = 3},
+ {.offset = 31, .length = 3},
+ {.offset = 47, .length = 3},
+ {.offset = 63, .length = 3},
+ {.offset = 79, .length = 3},
+ {.offset = 95, .length = 3},
+ {.offset = 111, .length = 3},
+ {.offset = 127, .length = 3},
+ {.offset = 143, .length = 3},
+ {.offset = 159, .length = 3},
+ {.offset = 175, .length = 3},
+ {.offset = 191, .length = 3},
+ {.offset = 207, .length = 3},
+ {.offset = 223, .length = 3},
+ {.offset = 239, .length = 3},
+ {.offset = 255, .length = 1}
+ }
+};
+
+/*
+ * ECC4 layout for NAND of pagesize 4096 bytes & OOBsize 224 bytes. 13*8 bytes
+ * of OOB size is reserved for ECC, Byte no. 0 & 1 reserved for bad block & 118
+ * bytes are free for use.
+ */
+static struct nand_ecclayout fsmc_ecc4_224_layout = {
+ .eccbytes = 104,
+ .eccpos = { 2, 3, 4, 5, 6, 7, 8,
+ 9, 10, 11, 12, 13, 14,
+ 18, 19, 20, 21, 22, 23, 24,
+ 25, 26, 27, 28, 29, 30,
+ 34, 35, 36, 37, 38, 39, 40,
+ 41, 42, 43, 44, 45, 46,
+ 50, 51, 52, 53, 54, 55, 56,
+ 57, 58, 59, 60, 61, 62,
+ 66, 67, 68, 69, 70, 71, 72,
+ 73, 74, 75, 76, 77, 78,
+ 82, 83, 84, 85, 86, 87, 88,
+ 89, 90, 91, 92, 93, 94,
+ 98, 99, 100, 101, 102, 103, 104,
+ 105, 106, 107, 108, 109, 110,
+ 114, 115, 116, 117, 118, 119, 120,
+ 121, 122, 123, 124, 125, 126
+ },
+ .oobfree = {
+ {.offset = 15, .length = 3},
+ {.offset = 31, .length = 3},
+ {.offset = 47, .length = 3},
+ {.offset = 63, .length = 3},
+ {.offset = 79, .length = 3},
+ {.offset = 95, .length = 3},
+ {.offset = 111, .length = 3},
+ {.offset = 127, .length = 97}
+ }
+};
+
+/*
+ * ECC4 layout for NAND of pagesize 4096 bytes & OOBsize 128 bytes. 13*8 bytes
+ * of OOB size is reserved for ECC, Byte no. 0 & 1 reserved for bad block & 22
+ * bytes are free for use.
+ */
+static struct nand_ecclayout fsmc_ecc4_128_layout = {
.eccbytes = 104,
.eccpos = { 2, 3, 4, 5, 6, 7, 8,
9, 10, 11, 12, 13, 14,
}
};
+/*
+ * ECC4 layout for NAND of pagesize 2048 bytes & OOBsize 64 bytes. 13*4 bytes of
+ * OOB size is reserved for ECC, Byte no. 0 & 1 reserved for bad block and 10
+ * bytes are free for use.
+ */
+static struct nand_ecclayout fsmc_ecc4_64_layout = {
+ .eccbytes = 52,
+ .eccpos = { 2, 3, 4, 5, 6, 7, 8,
+ 9, 10, 11, 12, 13, 14,
+ 18, 19, 20, 21, 22, 23, 24,
+ 25, 26, 27, 28, 29, 30,
+ 34, 35, 36, 37, 38, 39, 40,
+ 41, 42, 43, 44, 45, 46,
+ 50, 51, 52, 53, 54, 55, 56,
+ 57, 58, 59, 60, 61, 62,
+ },
+ .oobfree = {
+ {.offset = 15, .length = 3},
+ {.offset = 31, .length = 3},
+ {.offset = 47, .length = 3},
+ {.offset = 63, .length = 1},
+ }
+};
+
+/*
+ * ECC4 layout for NAND of pagesize 512 bytes & OOBsize 16 bytes. 13 bytes of
+ * OOB size is reserved for ECC, Byte no. 4 & 5 reserved for bad block and One
+ * byte is free for use.
+ */
+static struct nand_ecclayout fsmc_ecc4_16_layout = {
+ .eccbytes = 13,
+ .eccpos = { 0, 1, 2, 3, 6, 7, 8,
+ 9, 10, 11, 12, 13, 14
+ },
+ .oobfree = {
+ {.offset = 15, .length = 1},
+ }
+};
+
/*
* ECC placement definitions in oobfree type format.
* There are 13 bytes of ecc for every 512 byte block and it has to be read
}
};
-static struct nand_ecclayout fsmc_ecc4_sp_layout = {
- .eccbytes = 13,
- .eccpos = { 0, 1, 2, 3, 6, 7, 8,
- 9, 10, 11, 12, 13, 14
- },
- .oobfree = {
- {.offset = 15, .length = 1},
- }
-};
-
static struct fsmc_eccplace fsmc_ecc4_sp_place = {
.eccplace = {
{.offset = 0, .length = 4},
return 0;
}
+/* Count the number of 0's in buff upto a max of max_bits */
+static int count_written_bits(uint8_t *buff, int size, int max_bits)
+{
+ int k, written_bits = 0;
+
+ for (k = 0; k < size; k++) {
+ written_bits += hweight8(~buff[k]);
+ if (written_bits > max_bits)
+ break;
+ }
+
+ return written_bits;
+}
+
/*
* fsmc_read_page_hwecc
* @mtd: mtd info structure
uint8_t *oob = (uint8_t *)&ecc_oob[0];
for (i = 0, s = 0; s < eccsteps; s++, i += eccbytes, p += eccsize) {
-
chip->cmdfunc(mtd, NAND_CMD_READ0, s * eccsize, page);
chip->ecc.hwctl(mtd, NAND_ECC_READ);
chip->read_buf(mtd, p, eccsize);
j += len;
}
- memcpy(&ecc_code[i], oob, 13);
+ memcpy(&ecc_code[i], oob, chip->ecc.bytes);
chip->ecc.calculate(mtd, p, &ecc_calc[i]);
stat = chip->ecc.correct(mtd, p, &ecc_code[i], &ecc_calc[i]);
}
/*
- * fsmc_correct_data
+ * fsmc_bch8_correct_data
* @mtd: mtd info structure
* @dat: buffer of read data
* @read_ecc: ecc read from device spare area
* calc_ecc is a 104 bit information containing maximum of 8 error
* offset informations of 13 bits each in 512 bytes of read data.
*/
-static int fsmc_correct_data(struct mtd_info *mtd, uint8_t *dat,
+static int fsmc_bch8_correct_data(struct mtd_info *mtd, uint8_t *dat,
uint8_t *read_ecc, uint8_t *calc_ecc)
{
struct fsmc_nand_data *host = container_of(mtd,
struct fsmc_nand_data, mtd);
+ struct nand_chip *chip = mtd->priv;
struct fsmc_regs *regs = host->regs_va;
unsigned int bank = host->bank;
- uint16_t err_idx[8];
- uint64_t ecc_data[2];
+ uint32_t err_idx[8];
uint32_t num_err, i;
+ uint32_t ecc1, ecc2, ecc3, ecc4;
- /* The calculated ecc is actually the correction index in data */
- memcpy(ecc_data, calc_ecc, 13);
+ num_err = (readl(®s->bank_regs[bank].sts) >> 10) & 0xF;
+
+ /* no bit flipping */
+ if (likely(num_err == 0))
+ return 0;
+
+ /* too many errors */
+ if (unlikely(num_err > 8)) {
+ /*
+ * This is a temporary erase check. A newly erased page read
+ * would result in an ecc error because the oob data is also
+ * erased to FF and the calculated ecc for an FF data is not
+ * FF..FF.
+ * This is a workaround to skip performing correction in case
+ * data is FF..FF
+ *
+ * Logic:
+ * For every page, each bit written as 0 is counted until these
+ * number of bits are greater than 8 (the maximum correction
+ * capability of FSMC for each 512 + 13 bytes)
+ */
+
+ int bits_ecc = count_written_bits(read_ecc, chip->ecc.bytes, 8);
+ int bits_data = count_written_bits(dat, chip->ecc.size, 8);
+
+ if ((bits_ecc + bits_data) <= 8) {
+ if (bits_data)
+ memset(dat, 0xff, chip->ecc.size);
+ return bits_data;
+ }
+
+ return -EBADMSG;
+ }
/*
* ------------------- calc_ecc[] bit wise -----------|--13 bits--|
* uint64_t array and error offset indexes are populated in err_idx
* array
*/
- for (i = 0; i < 8; i++) {
- if (i == 4) {
- err_idx[4] = ((ecc_data[1] & 0x1) << 12) | ecc_data[0];
- ecc_data[1] >>= 1;
- continue;
- }
- err_idx[i] = (ecc_data[i/4] & 0x1FFF);
- ecc_data[i/4] >>= 13;
- }
-
- num_err = (readl(®s->bank_regs[bank].sts) >> 10) & 0xF;
-
- if (num_err == 0xF)
- return -EBADMSG;
+ ecc1 = readl(®s->bank_regs[bank].ecc1);
+ ecc2 = readl(®s->bank_regs[bank].ecc2);
+ ecc3 = readl(®s->bank_regs[bank].ecc3);
+ ecc4 = readl(®s->bank_regs[bank].sts);
+
+ err_idx[0] = (ecc1 >> 0) & 0x1FFF;
+ err_idx[1] = (ecc1 >> 13) & 0x1FFF;
+ err_idx[2] = (((ecc2 >> 0) & 0x7F) << 6) | ((ecc1 >> 26) & 0x3F);
+ err_idx[3] = (ecc2 >> 7) & 0x1FFF;
+ err_idx[4] = (((ecc3 >> 0) & 0x1) << 12) | ((ecc2 >> 20) & 0xFFF);
+ err_idx[5] = (ecc3 >> 1) & 0x1FFF;
+ err_idx[6] = (ecc3 >> 14) & 0x1FFF;
+ err_idx[7] = (((ecc4 >> 16) & 0xFF) << 5) | ((ecc3 >> 27) & 0x1F);
i = 0;
while (num_err--) {
change_bit(0, (unsigned long *)&err_idx[i]);
change_bit(1, (unsigned long *)&err_idx[i]);
- if (err_idx[i] <= 512 * 8) {
+ if (err_idx[i] <= chip->ecc.size * 8) {
change_bit(err_idx[i], (unsigned long *)dat);
i++;
}
goto err_probe1;
}
- host->resaddr = request_mem_region(res->start + PLAT_NAND_ALE,
+ host->resaddr = request_mem_region(res->start + pdata->ale_off,
resource_size(res), pdev->name);
if (!host->resaddr) {
ret = -EIO;
goto err_probe1;
}
- host->addr_va = ioremap(res->start + PLAT_NAND_ALE, resource_size(res));
+ host->addr_va = ioremap(res->start + pdata->ale_off,
+ resource_size(res));
if (!host->addr_va) {
ret = -EIO;
goto err_probe1;
}
- host->rescmd = request_mem_region(res->start + PLAT_NAND_CLE,
+ host->rescmd = request_mem_region(res->start + pdata->cle_off,
resource_size(res), pdev->name);
if (!host->rescmd) {
ret = -EIO;
goto err_probe1;
}
- host->cmd_va = ioremap(res->start + PLAT_NAND_CLE, resource_size(res));
+ host->cmd_va = ioremap(res->start + pdata->cle_off, resource_size(res));
if (!host->cmd_va) {
ret = -EIO;
goto err_probe1;
if (AMBA_REV_BITS(host->pid) >= 8) {
nand->ecc.read_page = fsmc_read_page_hwecc;
nand->ecc.calculate = fsmc_read_hwecc_ecc4;
- nand->ecc.correct = fsmc_correct_data;
+ nand->ecc.correct = fsmc_bch8_correct_data;
nand->ecc.bytes = 13;
+ nand->ecc.strength = 8;
} else {
nand->ecc.calculate = fsmc_read_hwecc_ecc1;
nand->ecc.correct = nand_correct_data;
nand->ecc.bytes = 3;
+ nand->ecc.strength = 1;
}
/*
}
if (AMBA_REV_BITS(host->pid) >= 8) {
- if (host->mtd.writesize == 512) {
- nand->ecc.layout = &fsmc_ecc4_sp_layout;
+ switch (host->mtd.oobsize) {
+ case 16:
+ nand->ecc.layout = &fsmc_ecc4_16_layout;
host->ecc_place = &fsmc_ecc4_sp_place;
- } else {
- nand->ecc.layout = &fsmc_ecc4_lp_layout;
+ break;
+ case 64:
+ nand->ecc.layout = &fsmc_ecc4_64_layout;
+ host->ecc_place = &fsmc_ecc4_lp_place;
+ break;
+ case 128:
+ nand->ecc.layout = &fsmc_ecc4_128_layout;
host->ecc_place = &fsmc_ecc4_lp_place;
+ break;
+ case 224:
+ nand->ecc.layout = &fsmc_ecc4_224_layout;
+ host->ecc_place = &fsmc_ecc4_lp_place;
+ break;
+ case 256:
+ nand->ecc.layout = &fsmc_ecc4_256_layout;
+ host->ecc_place = &fsmc_ecc4_lp_place;
+ break;
+ default:
+ printk(KERN_WARNING "No oob scheme defined for "
+ "oobsize %d\n", mtd->oobsize);
+ BUG();
}
} else {
- nand->ecc.layout = &fsmc_ecc1_layout;
+ switch (host->mtd.oobsize) {
+ case 16:
+ nand->ecc.layout = &fsmc_ecc1_16_layout;
+ break;
+ case 64:
+ nand->ecc.layout = &fsmc_ecc1_64_layout;
+ break;
+ case 128:
+ nand->ecc.layout = &fsmc_ecc1_128_layout;
+ break;
+ default:
+ printk(KERN_WARNING "No oob scheme defined for "
+ "oobsize %d\n", mtd->oobsize);
+ BUG();
+ }
}
/* Second stage of scan to fill MTD data-structures */
* Check for partition info passed
*/
host->mtd.name = "nand";
- ret = mtd_device_parse_register(&host->mtd, NULL, 0,
- host->mtd.size <= 0x04000000 ?
- partition_info_16KB_blk :
- partition_info_128KB_blk,
- host->mtd.size <= 0x04000000 ?
- ARRAY_SIZE(partition_info_16KB_blk) :
- ARRAY_SIZE(partition_info_128KB_blk));
+ ret = mtd_device_parse_register(&host->mtd, NULL, NULL,
+ host->mtd.size <= 0x04000000 ?
+ partition_info_16KB_blk :
+ partition_info_128KB_blk,
+ host->mtd.size <= 0x04000000 ?
+ ARRAY_SIZE(partition_info_16KB_blk) :
+ ARRAY_SIZE(partition_info_128KB_blk));
if (ret)
goto err_probe;
projects / karo-tx-linux.git / blobdiff