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mtd: nand: sunxi: make use of sunxi_nfc_hw_ecc_read/write_chunk()

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The sunxi_nfc_hw_ecc_read/write_chunk() functions have been created to
factorize the code in the normal and syndrome ECC implementation.
Make use of them where appropriate.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
This commit is contained in:
Boris BREZILLON 2015-09-30 23:45:25 +02:00 committed by Brian Norris
parent 913821bdd2
commit b462551c12
1 changed files with 37 additions and 125 deletions
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162
drivers/mtd/nand/sunxi_nand.c
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@ -663,61 +663,25 @@ static int sunxi_nfc_hw_ecc_read_page(struct mtd_info *mtd,
struct nand_chip *chip, uint8_t *buf,
int oob_required, int page)
{
struct sunxi_nfc *nfc = to_sunxi_nfc(chip->controller);
struct nand_ecc_ctrl *ecc = &chip->ecc;
struct nand_ecclayout *layout = ecc->layout;
unsigned int max_bitflips = 0;
int ret, i, cur_off = 0;
int offset;
int ret;
u32 tmp;
int i;
int cnt;
sunxi_nfc_hw_ecc_enable(mtd);
for (i = 0; i < ecc->steps; i++) {
if (i)
chip->cmdfunc(mtd, NAND_CMD_RNDOUT, i * ecc->size, -1);
int data_off = i * ecc->size;
int oob_off = i * (ecc->bytes + 4);
u8 *data = buf + data_off;
u8 *oob = chip->oob_poi + oob_off;
offset = mtd->writesize + layout->eccpos[i * ecc->bytes] - 4;
chip->read_buf(mtd, NULL, ecc->size);
chip->cmdfunc(mtd, NAND_CMD_RNDOUT, offset, -1);
ret = sunxi_nfc_wait_cmd_fifo_empty(nfc);
ret = sunxi_nfc_hw_ecc_read_chunk(mtd, data, data_off, oob,
oob_off + mtd->writesize,
&cur_off, &max_bitflips);
if (ret)
return ret;
tmp = NFC_DATA_TRANS | NFC_DATA_SWAP_METHOD | NFC_ECC_OP;
writel(tmp, nfc->regs + NFC_REG_CMD);
ret = sunxi_nfc_wait_int(nfc, NFC_CMD_INT_FLAG, 0);
if (ret)
return ret;
memcpy_fromio(buf + (i * ecc->size),
nfc->regs + NFC_RAM0_BASE, ecc->size);
if (readl(nfc->regs + NFC_REG_ECC_ST) & NFC_ECC_ERR(0)) {
mtd->ecc_stats.failed++;
} else {
tmp = readl(nfc->regs + NFC_REG_ECC_ERR_CNT(0));
mtd->ecc_stats.corrected += NFC_ECC_ERR_CNT(0, tmp);
max_bitflips = max_t(unsigned int, max_bitflips, tmp);
}
if (oob_required) {
chip->cmdfunc(mtd, NAND_CMD_RNDOUT, offset, -1);
ret = sunxi_nfc_wait_cmd_fifo_empty(nfc);
if (ret)
return ret;
offset -= mtd->writesize;
chip->read_buf(mtd, chip->oob_poi + offset,
ecc->bytes + 4);
}
}
if (oob_required) {
@ -740,40 +704,22 @@ static int sunxi_nfc_hw_ecc_write_page(struct mtd_info *mtd,
struct nand_chip *chip,
const uint8_t *buf, int oob_required)
{
struct sunxi_nfc *nfc = to_sunxi_nfc(chip->controller);
struct nand_ecc_ctrl *ecc = &chip->ecc;
struct nand_ecclayout *layout = ecc->layout;
int ret, i, cur_off = 0;
int offset;
int ret;
u32 tmp;
int i;
int cnt;
sunxi_nfc_hw_ecc_enable(mtd);
for (i = 0; i < ecc->steps; i++) {
if (i)
chip->cmdfunc(mtd, NAND_CMD_RNDIN, i * ecc->size, -1);
int data_off = i * ecc->size;
int oob_off = i * (ecc->bytes + 4);
const u8 *data = buf + data_off;
const u8 *oob = chip->oob_poi + oob_off;
chip->write_buf(mtd, buf + (i * ecc->size), ecc->size);
offset = layout->eccpos[i * ecc->bytes] - 4 + mtd->writesize;
/* Fill OOB data in */
writel(NFC_BUF_TO_USER_DATA(chip->oob_poi +
layout->oobfree[i].offset),
nfc->regs + NFC_REG_USER_DATA(0));
chip->cmdfunc(mtd, NAND_CMD_RNDIN, offset, -1);
ret = sunxi_nfc_wait_cmd_fifo_empty(nfc);
if (ret)
return ret;
tmp = NFC_DATA_TRANS | NFC_DATA_SWAP_METHOD | NFC_ACCESS_DIR |
NFC_ECC_OP;
writel(tmp, nfc->regs + NFC_REG_CMD);
ret = sunxi_nfc_wait_int(nfc, NFC_CMD_INT_FLAG, 0);
ret = sunxi_nfc_hw_ecc_write_chunk(mtd, data, data_off, oob,
oob_off + mtd->writesize,
&cur_off);
if (ret)
return ret;
}
@ -799,53 +745,31 @@ static int sunxi_nfc_hw_syndrome_ecc_read_page(struct mtd_info *mtd,
uint8_t *buf, int oob_required,
int page)
{
struct sunxi_nfc *nfc = to_sunxi_nfc(chip->controller);
struct nand_ecc_ctrl *ecc = &chip->ecc;
unsigned int max_bitflips = 0;
uint8_t *oob = chip->oob_poi;
int offset = 0;
int ret;
int ret, i, cur_off = 0;
int cnt;
u32 tmp;
int i;
sunxi_nfc_hw_ecc_enable(mtd);
for (i = 0; i < ecc->steps; i++) {
chip->read_buf(mtd, NULL, ecc->size);
int data_off = i * (ecc->size + ecc->bytes + 4);
int oob_off = data_off + ecc->size;
u8 *data = buf + (i * ecc->size);
u8 *oob = chip->oob_poi + (i * (ecc->bytes + 4));
tmp = NFC_DATA_TRANS | NFC_DATA_SWAP_METHOD | NFC_ECC_OP;
writel(tmp, nfc->regs + NFC_REG_CMD);
ret = sunxi_nfc_wait_int(nfc, NFC_CMD_INT_FLAG, 0);
ret = sunxi_nfc_hw_ecc_read_chunk(mtd, data, data_off, oob,
oob_off, &cur_off,
&max_bitflips);
if (ret)
return ret;
memcpy_fromio(buf, nfc->regs + NFC_RAM0_BASE, ecc->size);
buf += ecc->size;
offset += ecc->size;
if (readl(nfc->regs + NFC_REG_ECC_ST) & NFC_ECC_ERR(0)) {
mtd->ecc_stats.failed++;
} else {
tmp = readl(nfc->regs + NFC_REG_ECC_ERR_CNT(0));
mtd->ecc_stats.corrected += NFC_ECC_ERR_CNT(0, tmp);
max_bitflips = max_t(unsigned int, max_bitflips, tmp);
}
if (oob_required) {
chip->cmdfunc(mtd, NAND_CMD_RNDOUT, offset, -1);
chip->read_buf(mtd, oob, ecc->bytes + ecc->prepad);
oob += ecc->bytes + ecc->prepad;
}
offset += ecc->bytes + ecc->prepad;
}
if (oob_required) {
cnt = mtd->oobsize - (oob - chip->oob_poi);
cnt = mtd->writesize + mtd->oobsize - cur_off;
if (cnt > 0) {
chip->cmdfunc(mtd, NAND_CMD_RNDOUT, offset, -1);
u8 *oob = chip->oob_poi + mtd->oobsize - cnt;
chip->read_buf(mtd, oob, cnt);
}
}
@ -860,41 +784,29 @@ static int sunxi_nfc_hw_syndrome_ecc_write_page(struct mtd_info *mtd,
const uint8_t *buf,
int oob_required)
{
struct sunxi_nfc *nfc = to_sunxi_nfc(chip->controller);
struct nand_ecc_ctrl *ecc = &chip->ecc;
uint8_t *oob = chip->oob_poi;
int offset = 0;
int ret;
int ret, i, cur_off = 0;
int cnt;
u32 tmp;
int i;
sunxi_nfc_hw_ecc_enable(mtd);
for (i = 0; i < ecc->steps; i++) {
chip->write_buf(mtd, buf + (i * ecc->size), ecc->size);
offset += ecc->size;
int data_off = i * (ecc->size + ecc->bytes + 4);
int oob_off = data_off + ecc->size;
const u8 *data = buf + (i * ecc->size);
const u8 *oob = chip->oob_poi + (i * (ecc->bytes + 4));
/* Fill OOB data in */
writel(NFC_BUF_TO_USER_DATA(oob),
nfc->regs + NFC_REG_USER_DATA(0));
tmp = NFC_DATA_TRANS | NFC_DATA_SWAP_METHOD | NFC_ACCESS_DIR |
NFC_ECC_OP;
writel(tmp, nfc->regs + NFC_REG_CMD);
ret = sunxi_nfc_wait_int(nfc, NFC_CMD_INT_FLAG, 0);
ret = sunxi_nfc_hw_ecc_write_chunk(mtd, data, data_off,
oob, oob_off, &cur_off);
if (ret)
return ret;
offset += ecc->bytes + ecc->prepad;
oob += ecc->bytes + ecc->prepad;
}
if (oob_required) {
cnt = mtd->oobsize - (oob - chip->oob_poi);
cnt = mtd->writesize + mtd->oobsize - cur_off;
if (cnt > 0) {
chip->cmdfunc(mtd, NAND_CMD_RNDIN, offset, -1);
u8 *oob = chip->oob_poi + mtd->oobsize - cnt;
chip->write_buf(mtd, oob, cnt);
}
}