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Message-Id: <20230531124953.21007-3-quic_mdalam@quicinc.com>
Date: Wed, 31 May 2023 18:19:51 +0530
From: Md Sadre Alam <quic_mdalam@...cinc.com>
To: mani@...nel.org, miquel.raynal@...tlin.com, richard@....at,
vigneshr@...com, linux-mtd@...ts.infradead.org,
linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: quic_srichara@...cinc.com, quic_mdalam@...cinc.com
Subject: [PATCH v3 3/5] mtd: rawnand: qcom: Add support for param_page read exec_ops
This change will add exec_ops for PARAM_PAGE_READ command.
Co-developed-by: Sricharan Ramabadhran <quic_srichara@...cinc.com>
Signed-off-by: Sricharan Ramabadhran <quic_srichara@...cinc.com>
Signed-off-by: Md Sadre Alam <quic_mdalam@...cinc.com>
---
Change in [v3]
* Removed hard coded value in param_page exec_op API, and used whatever
passed by core.
* Removed nandc->props->qpic_v2 condition , since its not needed at all.
* Updated nandc->buf_count = len , len provided by core.
Change in [v2]
* Missed to post Cover-letter, so posting v2 patch with cover-letter
Change in [v1]
* Added initial support for exec_ops.
drivers/mtd/nand/raw/qcom_nandc.c | 105 +++++++++++++++++++++++++++++-
1 file changed, 104 insertions(+), 1 deletion(-)
diff --git a/drivers/mtd/nand/raw/qcom_nandc.c b/drivers/mtd/nand/raw/qcom_nandc.c
index 659ba923b68a..b4823b72fe73 100644
--- a/drivers/mtd/nand/raw/qcom_nandc.c
+++ b/drivers/mtd/nand/raw/qcom_nandc.c
@@ -1546,7 +1546,7 @@ static void pre_command(struct qcom_nand_host *host, int command)
clear_read_regs(nandc);
- if (command == NAND_CMD_PARAM || command == NAND_CMD_ERASE1)
+ if (command == NAND_CMD_ERASE1)
clear_bam_transaction(nandc);
}
@@ -3177,6 +3177,103 @@ static int qcom_misc_cmd_type_exec(struct nand_chip *chip, const struct nand_sub
return ret;
}
+static int qcom_param_page_type_exec(struct nand_chip *chip, const struct nand_subop *subop)
+{
+ 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;
+ const struct nand_op_instr *instr = NULL;
+ unsigned int op_id = 0;
+ unsigned int len = 0;
+ int ret = 0;
+
+ qcom_parse_instructions(chip, subop, &q_op);
+
+ q_op.cmd_reg |= PAGE_ACC | LAST_PAGE;
+
+ nandc->buf_count = 0;
+ nandc->buf_start = 0;
+ host->use_ecc = false;
+ clear_read_regs(nandc);
+ clear_bam_transaction(nandc);
+
+ nandc_set_reg(chip, NAND_FLASH_CMD, q_op.cmd_reg);
+
+ nandc_set_reg(chip, NAND_ADDR0, 0);
+ nandc_set_reg(chip, NAND_ADDR1, 0);
+ nandc_set_reg(chip, NAND_DEV0_CFG0, 0 << CW_PER_PAGE
+ | 512 << UD_SIZE_BYTES
+ | 5 << NUM_ADDR_CYCLES
+ | 0 << SPARE_SIZE_BYTES);
+ nandc_set_reg(chip, NAND_DEV0_CFG1, 7 << NAND_RECOVERY_CYCLES
+ | 0 << CS_ACTIVE_BSY
+ | 17 << BAD_BLOCK_BYTE_NUM
+ | 1 << BAD_BLOCK_IN_SPARE_AREA
+ | 2 << WR_RD_BSY_GAP
+ | 0 << WIDE_FLASH
+ | 1 << DEV0_CFG1_ECC_DISABLE);
+ if (!nandc->props->qpic_v2)
+ nandc_set_reg(chip, NAND_EBI2_ECC_BUF_CFG, 1 << ECC_CFG_ECC_DISABLE);
+
+ /* configure CMD1 and VLD for ONFI param probing in QPIC v1 */
+ if (!nandc->props->qpic_v2) {
+ nandc_set_reg(chip, NAND_DEV_CMD_VLD,
+ (nandc->vld & ~READ_START_VLD));
+ nandc_set_reg(chip, NAND_DEV_CMD1,
+ (nandc->cmd1 & ~(0xFF << READ_ADDR))
+ | NAND_CMD_PARAM << READ_ADDR);
+ }
+
+ nandc_set_reg(chip, NAND_EXEC_CMD, 1);
+
+ if (!nandc->props->qpic_v2) {
+ nandc_set_reg(chip, NAND_DEV_CMD1_RESTORE, nandc->cmd1);
+ nandc_set_reg(chip, NAND_DEV_CMD_VLD_RESTORE, nandc->vld);
+ }
+
+ instr = q_op.data_instr;
+ op_id = q_op.data_instr_idx;
+ len = nand_subop_get_data_len(subop, op_id);
+
+ nandc_set_read_loc(chip, 0, 0, 0, len, 1);
+
+ if (!nandc->props->qpic_v2) {
+ write_reg_dma(nandc, NAND_DEV_CMD_VLD, 1, 0);
+ write_reg_dma(nandc, NAND_DEV_CMD1, 1, NAND_BAM_NEXT_SGL);
+ }
+
+ nandc->buf_count = len;
+ memset(nandc->data_buffer, 0xff, nandc->buf_count);
+
+ config_nand_single_cw_page_read(chip, false, 0);
+
+ read_data_dma(nandc, FLASH_BUF_ACC, nandc->data_buffer,
+ nandc->buf_count, 0);
+
+ /* restore CMD1 and VLD regs */
+ if (!nandc->props->qpic_v2) {
+ write_reg_dma(nandc, NAND_DEV_CMD1_RESTORE, 1, 0);
+ write_reg_dma(nandc, NAND_DEV_CMD_VLD_RESTORE, 1, NAND_BAM_NEXT_SGL);
+ }
+
+ ret = submit_descs(nandc);
+ if (ret) {
+ dev_err(nandc->dev, "failure in sbumitting param page descriptor\n");
+ free_descs(nandc);
+ goto err_out;
+ }
+ free_descs(nandc);
+
+ ret = qcom_wait_rdy_poll(chip, q_op.rdy_timeout_ms);
+ if (ret)
+ goto err_out;
+
+ memcpy(instr->ctx.data.buf.in, nandc->data_buffer, len);
+
+err_out:
+ return ret;
+}
+
static const struct nand_op_parser qcom_op_parser = NAND_OP_PARSER(
NAND_OP_PARSER_PATTERN(
qcom_misc_cmd_type_exec,
@@ -3191,6 +3288,12 @@ static const struct nand_op_parser qcom_op_parser = NAND_OP_PARSER(
qcom_read_status_exec,
NAND_OP_PARSER_PAT_CMD_ELEM(false),
NAND_OP_PARSER_PAT_DATA_IN_ELEM(false, 1)),
+ NAND_OP_PARSER_PATTERN(
+ qcom_param_page_type_exec,
+ NAND_OP_PARSER_PAT_CMD_ELEM(false),
+ NAND_OP_PARSER_PAT_ADDR_ELEM(false, MAX_ADDRESS_CYCLE),
+ NAND_OP_PARSER_PAT_WAITRDY_ELEM(true),
+ NAND_OP_PARSER_PAT_DATA_IN_ELEM(false, 512)),
);
static int qcom_check_op(struct nand_chip *chip,
--
2.17.1
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