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Commit 503ee5aa authored by Md Sadre Alam's avatar Md Sadre Alam Committed by Miquel Raynal
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mtd: rawnand: qcom: update last code word register 

From QPIC v2 onwards a new register got added to read last
code word.Add support for this READ_LOCATION_LAST_CW_n
register.

In the case of QPIC v2, codewords 0, 1 and 2 will be accessed
through READ_LOCATION_n, while codeword 3 will be accessed
through READ_LOCATION_LAST_CW_n.
Signed-off-by: default avatarMd Sadre Alam <mdalam@codeaurora.org>
Signed-off-by: default avatarMiquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/1614109141-7531-5-git-send-email-mdalam@codeaurora.org
parent e7a307f2
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Showing with 57 additions and 21 deletions
drivers/mtd/nand/raw/qcom_nandc.c
View file @ 503ee5aa
......@@ -48,6 +48,10 @@
#define NAND_READ_LOCATION_1 0xf24
#define NAND_READ_LOCATION_2 0xf28
#define NAND_READ_LOCATION_3 0xf2c
#define NAND_READ_LOCATION_LAST_CW_0 0xf40
#define NAND_READ_LOCATION_LAST_CW_1 0xf44
#define NAND_READ_LOCATION_LAST_CW_2 0xf48
#define NAND_READ_LOCATION_LAST_CW_3 0xf4c
/* dummy register offsets, used by write_reg_dma */
#define NAND_DEV_CMD1_RESTORE 0xdead
......@@ -187,6 +191,11 @@ nandc_set_reg(chip, reg, \
((read_size) << READ_LOCATION_SIZE) | \
((is_last_read_loc) << READ_LOCATION_LAST))
#define nandc_set_read_loc_last(chip, reg, cw_offset, read_size, is_last_read_loc) \
nandc_set_reg(chip, reg, \
((cw_offset) << READ_LOCATION_OFFSET) | \
((read_size) << READ_LOCATION_SIZE) | \
((is_last_read_loc) << READ_LOCATION_LAST))
/*
* Returns the actual register address for all NAND_DEV_ registers
* (i.e. NAND_DEV_CMD0, NAND_DEV_CMD1, NAND_DEV_CMD2 and NAND_DEV_CMD_VLD)
......@@ -316,6 +325,10 @@ struct nandc_regs {
__le32 read_location1;
__le32 read_location2;
__le32 read_location3;
__le32 read_location_last0;
__le32 read_location_last1;
__le32 read_location_last2;
__le32 read_location_last3;
__le32 erased_cw_detect_cfg_clr;
__le32 erased_cw_detect_cfg_set;
......@@ -644,6 +657,14 @@ static __le32 *offset_to_nandc_reg(struct nandc_regs *regs, int offset)
return &regs->read_location2;
case NAND_READ_LOCATION_3:
return &regs->read_location3;
case NAND_READ_LOCATION_LAST_CW_0:
return &regs->read_location_last0;
case NAND_READ_LOCATION_LAST_CW_1:
return &regs->read_location_last1;
case NAND_READ_LOCATION_LAST_CW_2:
return &regs->read_location_last2;
case NAND_READ_LOCATION_LAST_CW_3:
return &regs->read_location_last3;
default:
return NULL;
}
......@@ -672,12 +693,21 @@ static bool qcom_nandc_is_last_cw(struct nand_ecc_ctrl *ecc, int cw)
static void nandc_set_read_loc(struct nand_chip *chip, int cw, int reg,
int cw_offset, int read_size, int is_last_read_loc)
{
struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip);
struct nand_ecc_ctrl *ecc = &chip->ecc;
int reg_base = NAND_READ_LOCATION_0;
if (nandc->props->qpic_v2 && qcom_nandc_is_last_cw(ecc, cw))
reg_base = NAND_READ_LOCATION_LAST_CW_0;
reg_base += reg * 4;
return nandc_set_read_loc_first(chip, reg_base, cw_offset,
read_size, is_last_read_loc);
if (nandc->props->qpic_v2 && qcom_nandc_is_last_cw(ecc, cw))
return nandc_set_read_loc_last(chip, reg_base, cw_offset,
read_size, is_last_read_loc);
else
return nandc_set_read_loc_first(chip, reg_base, cw_offset,
read_size, is_last_read_loc);
}
/* helper to configure address register values */
......@@ -698,8 +728,9 @@ static void set_address(struct qcom_nand_host *host, u16 column, int page)
*
* @num_cw: number of steps for the read/write operation
* @read: read or write operation
* @cw : which code word
*/
static void update_rw_regs(struct qcom_nand_host *host, int num_cw, bool read)
static void update_rw_regs(struct qcom_nand_host *host, int num_cw, bool read, int cw)
{
struct nand_chip *chip = &host->chip;
u32 cmd, cfg0, cfg1, ecc_bch_cfg;
......@@ -737,7 +768,7 @@ static void update_rw_regs(struct qcom_nand_host *host, int num_cw, bool read)
nandc_set_reg(chip, NAND_EXEC_CMD, 1);
if (read)
nandc_set_read_loc(chip, 0, 0, 0, host->use_ecc ?
nandc_set_read_loc(chip, cw, 0, 0, host->use_ecc ?
host->cw_data : host->cw_size, 1);
}
......@@ -1113,13 +1144,18 @@ static void config_nand_page_read(struct nand_chip *chip)
* before reading each codeword in NAND page.
*/
static void
config_nand_cw_read(struct nand_chip *chip, bool use_ecc)
config_nand_cw_read(struct nand_chip *chip, bool use_ecc, int cw)
{
struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip);
struct nand_ecc_ctrl *ecc = &chip->ecc;
int reg = NAND_READ_LOCATION_0;
if (nandc->props->qpic_v2 && qcom_nandc_is_last_cw(ecc, cw))
reg = NAND_READ_LOCATION_LAST_CW_0;
if (nandc->props->is_bam)
write_reg_dma(nandc, NAND_READ_LOCATION_0, 4,
NAND_BAM_NEXT_SGL);
write_reg_dma(nandc, reg, 4, NAND_BAM_NEXT_SGL);
write_reg_dma(nandc, NAND_FLASH_CMD, 1, NAND_BAM_NEXT_SGL);
write_reg_dma(nandc, NAND_EXEC_CMD, 1, NAND_BAM_NEXT_SGL);
......@@ -1139,10 +1175,10 @@ config_nand_cw_read(struct nand_chip *chip, bool use_ecc)
*/
static void
config_nand_single_cw_page_read(struct nand_chip *chip,
bool use_ecc)
bool use_ecc, int cw)
{
config_nand_page_read(chip);
config_nand_cw_read(chip, use_ecc);
config_nand_cw_read(chip, use_ecc, cw);
}
/*
......@@ -1240,7 +1276,7 @@ static int nandc_param(struct qcom_nand_host *host)
nandc->buf_count = 512;
memset(nandc->data_buffer, 0xff, nandc->buf_count);
config_nand_single_cw_page_read(chip, false);
config_nand_single_cw_page_read(chip, false, 0);
read_data_dma(nandc, FLASH_BUF_ACC, nandc->data_buffer,
nandc->buf_count, 0);
......@@ -1517,7 +1553,7 @@ static void qcom_nandc_command(struct nand_chip *chip, unsigned int command,
host->use_ecc = true;
set_address(host, 0, page_addr);
update_rw_regs(host, ecc->steps, true);
update_rw_regs(host, ecc->steps, true, 0);
break;
case NAND_CMD_SEQIN:
......@@ -1641,7 +1677,7 @@ qcom_nandc_read_cw_raw(struct mtd_info *mtd, struct nand_chip *chip,
clear_bam_transaction(nandc);
set_address(host, host->cw_size * cw, page);
update_rw_regs(host, 1, true);
update_rw_regs(host, 1, true, cw);
config_nand_page_read(chip);
data_size1 = mtd->writesize - host->cw_size * (ecc->steps - 1);
......@@ -1670,7 +1706,7 @@ qcom_nandc_read_cw_raw(struct mtd_info *mtd, struct nand_chip *chip,
nandc_set_read_loc(chip, cw, 3, read_loc, oob_size2, 1);
}
config_nand_cw_read(chip, false);
config_nand_cw_read(chip, false, cw);
read_data_dma(nandc, reg_off, data_buf, data_size1, 0);
reg_off += data_size1;
......@@ -1909,7 +1945,7 @@ static int read_page_ecc(struct qcom_nand_host *host, u8 *data_buf,
}
}
config_nand_cw_read(chip, true);
config_nand_cw_read(chip, true, i);
if (data_buf)
read_data_dma(nandc, FLASH_BUF_ACC, data_buf,
......@@ -1969,9 +2005,9 @@ static int copy_last_cw(struct qcom_nand_host *host, int page)
memset(nandc->data_buffer, 0xff, size);
set_address(host, host->cw_size * (ecc->steps - 1), page);
update_rw_regs(host, 1, true);
update_rw_regs(host, 1, true, ecc->steps - 1);
config_nand_single_cw_page_read(chip, host->use_ecc);
config_nand_single_cw_page_read(chip, host->use_ecc, ecc->steps - 1);
read_data_dma(nandc, FLASH_BUF_ACC, nandc->data_buffer, size, 0);
......@@ -2036,7 +2072,7 @@ static int qcom_nandc_read_oob(struct nand_chip *chip, int page)
host->use_ecc = true;
set_address(host, 0, page);
update_rw_regs(host, ecc->steps, true);
update_rw_regs(host, ecc->steps, true, 0);
return read_page_ecc(host, NULL, chip->oob_poi, page);
}
......@@ -2060,7 +2096,7 @@ static int qcom_nandc_write_page(struct nand_chip *chip, const uint8_t *buf,
oob_buf = chip->oob_poi;
host->use_ecc = true;
update_rw_regs(host, ecc->steps, false);
update_rw_regs(host, ecc->steps, false, 0);
config_nand_page_write(chip);
for (i = 0; i < ecc->steps; i++) {
......@@ -2131,7 +2167,7 @@ static int qcom_nandc_write_page_raw(struct nand_chip *chip,
oob_buf = chip->oob_poi;
host->use_ecc = false;
update_rw_regs(host, ecc->steps, false);
update_rw_regs(host, ecc->steps, false, 0);
config_nand_page_write(chip);
for (i = 0; i < ecc->steps; i++) {
......@@ -2214,7 +2250,7 @@ static int qcom_nandc_write_oob(struct nand_chip *chip, int page)
0, mtd->oobavail);
set_address(host, host->cw_size * (ecc->steps - 1), page);
update_rw_regs(host, 1, false);
update_rw_regs(host, 1, false, 0);
config_nand_page_write(chip);
write_data_dma(nandc, FLASH_BUF_ACC,
......@@ -2293,7 +2329,7 @@ static int qcom_nandc_block_markbad(struct nand_chip *chip, loff_t ofs)
/* prepare write */
host->use_ecc = false;
set_address(host, host->cw_size * (ecc->steps - 1), page);
update_rw_regs(host, 1, false);
update_rw_regs(host, 1, false, ecc->steps - 1);
config_nand_page_write(chip);
write_data_dma(nandc, FLASH_BUF_ACC,
......
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