From 503ee5aad43054a26cfd5cc592a31270c05539cd Mon Sep 17 00:00:00 2001 From: Md Sadre Alam Date: Wed, 24 Feb 2021 01:09:01 +0530 Subject: [PATCH] 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: Md Sadre Alam Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/1614109141-7531-5-git-send-email-mdalam@codeaurora.org --- drivers/mtd/nand/raw/qcom_nandc.c | 78 ++++++++++++++++++++++--------- 1 file changed, 57 insertions(+), 21 deletions(-) diff --git a/drivers/mtd/nand/raw/qcom_nandc.c b/drivers/mtd/nand/raw/qcom_nandc.c index 88e1cba6260b..34d31c7c2dcf 100644 --- a/drivers/mtd/nand/raw/qcom_nandc.c +++ b/drivers/mtd/nand/raw/qcom_nandc.c @@ -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 ®s->read_location2; case NAND_READ_LOCATION_3: return ®s->read_location3; + case NAND_READ_LOCATION_LAST_CW_0: + return ®s->read_location_last0; + case NAND_READ_LOCATION_LAST_CW_1: + return ®s->read_location_last1; + case NAND_READ_LOCATION_LAST_CW_2: + return ®s->read_location_last2; + case NAND_READ_LOCATION_LAST_CW_3: + return ®s->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,