lkml.org 
[lkml]   [2023]   [May]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH v2 4/5] mtd: rawnand: qcom: Add support for read, write, erase exec_ops
    Date
    This change will add exec_ops support for READ, WRITE, and ERASE
    command.

    Co-developed-by: Sricharan Ramabadhran <quic_srichara@quicinc.com>
    Signed-off-by: Sricharan Ramabadhran <quic_srichara@quicinc.com>
    Signed-off-by: Md Sadre Alam <quic_mdalam@quicinc.com>
    ---
    Change in [v2]

    * Missed to post Cover-letter, so posting v2 patch with cover-letter

    drivers/mtd/nand/raw/qcom_nandc.c | 52 +++++++++++++++++++++++++++++--
    1 file changed, 49 insertions(+), 3 deletions(-)

    diff --git a/drivers/mtd/nand/raw/qcom_nandc.c b/drivers/mtd/nand/raw/qcom_nandc.c
    index 8717d5086f80..14ab21a4771b 100644
    --- a/drivers/mtd/nand/raw/qcom_nandc.c
    +++ b/drivers/mtd/nand/raw/qcom_nandc.c
    @@ -1765,7 +1765,8 @@ qcom_nandc_read_cw_raw(struct mtd_info *mtd, struct nand_chip *chip,
    int ret, reg_off = FLASH_BUF_ACC, read_loc = 0;
    int raw_cw = cw;

    - nand_read_page_op(chip, page, 0, NULL, 0);
    + chip->cont_read.ongoing = false;
    + nand_read_page_op(chip, page, 0, data_buf, mtd->writesize);
    host->use_ecc = false;

    if (nandc->props->qpic_v2)
    @@ -2182,14 +2183,24 @@ static void qcom_nandc_codeword_fixup(struct qcom_nand_host *host, int page)
    static int qcom_nandc_read_page(struct nand_chip *chip, uint8_t *buf,
    int oob_required, int page)
    {
    + struct mtd_info *mtd = nand_to_mtd(chip);
    struct qcom_nand_host *host = to_qcom_nand_host(chip);
    struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip);
    + struct nand_ecc_ctrl *ecc = &chip->ecc;
    u8 *data_buf, *oob_buf = NULL;

    if (host->nr_boot_partitions)
    qcom_nandc_codeword_fixup(host, page);

    - nand_read_page_op(chip, page, 0, NULL, 0);
    + chip->cont_read.ongoing = false;
    + nand_read_page_op(chip, page, 0, buf, mtd->writesize);
    + nandc->buf_count = 0;
    + nandc->buf_start = 0;
    + host->use_ecc = true;
    + clear_read_regs(nandc);
    + set_address(host, 0, page);
    + update_rw_regs(host, ecc->steps, true, 0);
    +
    data_buf = buf;
    oob_buf = oob_required ? chip->oob_poi : NULL;

    @@ -2259,6 +2270,10 @@ static int qcom_nandc_write_page(struct nand_chip *chip, const uint8_t *buf,

    nand_prog_page_begin_op(chip, page, 0, NULL, 0);

    + set_address(host, 0, page);
    + nandc->buf_count = 0;
    + nandc->buf_start = 0;
    +
    clear_read_regs(nandc);
    clear_bam_transaction(nandc);

    @@ -3081,7 +3096,38 @@ static int qcom_read_status_exec(struct nand_chip *chip,

    static int qcom_erase_cmd_type_exec(struct nand_chip *chip, const struct nand_subop *subop)
    {
    - return 0;
    + struct qcom_nand_host *host = to_qcom_nand_host(chip);
    + struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip);
    + struct qcom_op q_op;
    + int ret = 0;
    +
    + qcom_parse_instructions(chip, subop, &q_op);
    +
    + q_op.cmd_reg |= PAGE_ACC | LAST_PAGE;
    +
    + pre_command(host, NAND_CMD_ERASE1);
    +
    + nandc_set_reg(chip, NAND_FLASH_CMD, q_op.cmd_reg);
    + nandc_set_reg(chip, NAND_ADDR0, q_op.addr1_reg);
    + nandc_set_reg(chip, NAND_ADDR1, q_op.addr2_reg);
    + nandc_set_reg(chip, NAND_DEV0_CFG0,
    + host->cfg0_raw & ~(7 << CW_PER_PAGE));
    + nandc_set_reg(chip, NAND_DEV0_CFG1, host->cfg1_raw);
    + nandc_set_reg(chip, NAND_EXEC_CMD, 1);
    +
    + write_reg_dma(nandc, NAND_FLASH_CMD, 3, NAND_BAM_NEXT_SGL);
    + write_reg_dma(nandc, NAND_DEV0_CFG0, 2, NAND_BAM_NEXT_SGL);
    + write_reg_dma(nandc, NAND_EXEC_CMD, 1, NAND_BAM_NEXT_SGL);
    +
    + ret = submit_descs(nandc);
    + if (ret)
    + dev_err(nandc->dev, "failure in sbumitting reset descriptor\n");
    +
    + free_descs(nandc);
    +
    + ret = qcom_wait_rdy_poll(chip, q_op.rdy_timeout_ms);
    +
    + return ret;
    }

    static int qcom_param_page_type_exec(struct nand_chip *chip, const struct nand_subop *subop)
    --
    2.17.1
    \
     
     \ /
      Last update: 2023-05-11 15:31    [W:2.836 / U:0.200 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site