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Mon, 10 Jul 2023 05:44:48 +0000 Received: from pps.filterd (APBLRPPMTA01.qualcomm.com [127.0.0.1]) by APBLRPPMTA01.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTP id 36A5ijVo013325; Mon, 10 Jul 2023 05:44:45 GMT Received: from pps.reinject (localhost [127.0.0.1]) by APBLRPPMTA01.qualcomm.com (PPS) with ESMTP id 3rq0vkcgdc-1; Mon, 10 Jul 2023 05:44:45 +0000 Received: from APBLRPPMTA01.qualcomm.com (APBLRPPMTA01.qualcomm.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 36A5ijkq013318; Mon, 10 Jul 2023 05:44:45 GMT Received: from mdalam-linux.qualcomm.com (mdalam-linux.qualcomm.com [10.201.2.71]) by APBLRPPMTA01.qualcomm.com (PPS) with ESMTP id 36A5ii1f013317; Mon, 10 Jul 2023 05:44:45 +0000 Received: by mdalam-linux.qualcomm.com (Postfix, from userid 466583) id 3FC2312010C1; Mon, 10 Jul 2023 11:14:44 +0530 (IST) From: Md Sadre Alam To: mani@kernel.org, miquel.raynal@bootlin.com, richard@nod.at, vigneshr@ti.com, linux-mtd@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: quic_srichara@quicinc.com, quic_mdalam@quicinc.com Subject: [PATCH v5 2/2] mtd: rawnand: qcom: Remove legacy interface Date: Mon, 10 Jul 2023 11:14:40 +0530 Message-Id: <20230710054440.23297-2-quic_mdalam@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230710054440.23297-1-quic_mdalam@quicinc.com> References: <20230710054440.23297-1-quic_mdalam@quicinc.com> X-QCInternal: smtphost X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: M_yAhJ3IYXsctNCnQKg_YyR0UXpfbaBf X-Proofpoint-GUID: M_yAhJ3IYXsctNCnQKg_YyR0UXpfbaBf X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-07-10_04,2023-07-06_02,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 adultscore=0 spamscore=0 lowpriorityscore=0 clxscore=1015 impostorscore=0 mlxscore=0 phishscore=0 priorityscore=1501 suspectscore=0 mlxlogscore=999 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2305260000 definitions=main-2307100052 X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,SPF_HELO_NONE, SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Remove legacy interface implementation Co-developed-by: Sricharan Ramabadhran Signed-off-by: Sricharan Ramabadhran Signed-off-by: Md Sadre Alam --- Change in [v5] * No change in v5 Change in [v4] * Updated commit message Change in [v3] * Removed pre_command() API definition completely. 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 | 359 ------------------------------ 1 file changed, 359 deletions(-) diff --git a/drivers/mtd/nand/raw/qcom_nandc.c b/drivers/mtd/nand/raw/qcom_nandc.c index 852c6a203c78..b1e69d634d4a 100644 --- a/drivers/mtd/nand/raw/qcom_nandc.c +++ b/drivers/mtd/nand/raw/qcom_nandc.c @@ -1303,155 +1303,6 @@ static void config_nand_cw_write(struct nand_chip *chip) write_reg_dma(nandc, NAND_READ_STATUS, 1, NAND_BAM_NEXT_SGL); } -/* - * the following functions are used within chip->legacy.cmdfunc() to - * perform different NAND_CMD_* commands - */ - -/* sets up descriptors for NAND_CMD_PARAM */ -static int nandc_param(struct qcom_nand_host *host) -{ - struct nand_chip *chip = &host->chip; - struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip); - - /* - * NAND_CMD_PARAM is called before we know much about the FLASH chip - * in use. we configure the controller to perform a raw read of 512 - * bytes to read onfi params - */ - if (nandc->props->qpic_v2) - nandc_set_reg(chip, NAND_FLASH_CMD, OP_PAGE_READ_ONFI_READ | - PAGE_ACC | LAST_PAGE); - else - nandc_set_reg(chip, NAND_FLASH_CMD, OP_PAGE_READ | - PAGE_ACC | LAST_PAGE); - - 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); - } - - nandc_set_read_loc(chip, 0, 0, 0, 512, 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 = 512; - 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); - } - - return 0; -} - -/* sets up descriptors for NAND_CMD_ERASE1 */ -static int erase_block(struct qcom_nand_host *host, int page_addr) -{ - struct nand_chip *chip = &host->chip; - struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip); - - nandc_set_reg(chip, NAND_FLASH_CMD, - OP_BLOCK_ERASE | PAGE_ACC | LAST_PAGE); - nandc_set_reg(chip, NAND_ADDR0, page_addr); - nandc_set_reg(chip, NAND_ADDR1, 0); - 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); - nandc_set_reg(chip, NAND_FLASH_STATUS, host->clrflashstatus); - nandc_set_reg(chip, NAND_READ_STATUS, host->clrreadstatus); - - 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); - - read_reg_dma(nandc, NAND_FLASH_STATUS, 1, NAND_BAM_NEXT_SGL); - - write_reg_dma(nandc, NAND_FLASH_STATUS, 1, 0); - write_reg_dma(nandc, NAND_READ_STATUS, 1, NAND_BAM_NEXT_SGL); - - return 0; -} - -/* sets up descriptors for NAND_CMD_READID */ -static int read_id(struct qcom_nand_host *host, int column) -{ - struct nand_chip *chip = &host->chip; - struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip); - - if (column == -1) - return 0; - - nandc_set_reg(chip, NAND_FLASH_CMD, OP_FETCH_ID); - nandc_set_reg(chip, NAND_ADDR0, column); - nandc_set_reg(chip, NAND_ADDR1, 0); - nandc_set_reg(chip, NAND_FLASH_CHIP_SELECT, - nandc->props->is_bam ? 0 : DM_EN); - nandc_set_reg(chip, NAND_EXEC_CMD, 1); - - write_reg_dma(nandc, NAND_FLASH_CMD, 4, NAND_BAM_NEXT_SGL); - write_reg_dma(nandc, NAND_EXEC_CMD, 1, NAND_BAM_NEXT_SGL); - - read_reg_dma(nandc, NAND_READ_ID, 1, NAND_BAM_NEXT_SGL); - - return 0; -} - -/* sets up descriptors for NAND_CMD_RESET */ -static int reset(struct qcom_nand_host *host) -{ - struct nand_chip *chip = &host->chip; - struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip); - - nandc_set_reg(chip, NAND_FLASH_CMD, OP_RESET_DEVICE); - nandc_set_reg(chip, NAND_EXEC_CMD, 1); - - write_reg_dma(nandc, NAND_FLASH_CMD, 1, NAND_BAM_NEXT_SGL); - write_reg_dma(nandc, NAND_EXEC_CMD, 1, NAND_BAM_NEXT_SGL); - - read_reg_dma(nandc, NAND_FLASH_STATUS, 1, NAND_BAM_NEXT_SGL); - - return 0; -} - /* helpers to submit/free our list of dma descriptors */ static int submit_descs(struct qcom_nand_controller *nandc) { @@ -1534,150 +1385,6 @@ static void clear_read_regs(struct qcom_nand_controller *nandc) nandc_read_buffer_sync(nandc, false); } -static void pre_command(struct qcom_nand_host *host, int command) -{ - struct nand_chip *chip = &host->chip; - struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip); - - nandc->buf_count = 0; - nandc->buf_start = 0; - host->use_ecc = false; - host->last_command = command; - - clear_read_regs(nandc); - - clear_bam_transaction(nandc); -} - -/* - * this is called after NAND_CMD_PAGEPROG and NAND_CMD_ERASE1 to set our - * privately maintained status byte, this status byte can be read after - * NAND_CMD_STATUS is called - */ -static void parse_erase_write_errors(struct qcom_nand_host *host, int command) -{ - struct nand_chip *chip = &host->chip; - struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip); - struct nand_ecc_ctrl *ecc = &chip->ecc; - int num_cw; - int i; - - num_cw = command == NAND_CMD_PAGEPROG ? ecc->steps : 1; - nandc_read_buffer_sync(nandc, true); - - for (i = 0; i < num_cw; i++) { - u32 flash_status = le32_to_cpu(nandc->reg_read_buf[i]); - - if (flash_status & FS_MPU_ERR) - host->status &= ~NAND_STATUS_WP; - - if (flash_status & FS_OP_ERR || (i == (num_cw - 1) && - (flash_status & - FS_DEVICE_STS_ERR))) - host->status |= NAND_STATUS_FAIL; - } -} - -static void post_command(struct qcom_nand_host *host, int command) -{ - struct nand_chip *chip = &host->chip; - struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip); - - switch (command) { - case NAND_CMD_READID: - nandc_read_buffer_sync(nandc, true); - memcpy(nandc->data_buffer, nandc->reg_read_buf, - nandc->buf_count); - break; - case NAND_CMD_PAGEPROG: - case NAND_CMD_ERASE1: - parse_erase_write_errors(host, command); - break; - default: - break; - } -} - -/* - * Implements chip->legacy.cmdfunc. It's only used for a limited set of - * commands. The rest of the commands wouldn't be called by upper layers. - * For example, NAND_CMD_READOOB would never be called because we have our own - * versions of read_oob ops for nand_ecc_ctrl. - */ -static void qcom_nandc_command(struct nand_chip *chip, unsigned int command, - int column, int page_addr) -{ - struct qcom_nand_host *host = to_qcom_nand_host(chip); - struct nand_ecc_ctrl *ecc = &chip->ecc; - struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip); - bool wait = false; - int ret = 0; - - pre_command(host, command); - - switch (command) { - case NAND_CMD_RESET: - ret = reset(host); - wait = true; - break; - - case NAND_CMD_READID: - nandc->buf_count = 4; - ret = read_id(host, column); - wait = true; - break; - - case NAND_CMD_PARAM: - ret = nandc_param(host); - wait = true; - break; - - case NAND_CMD_ERASE1: - ret = erase_block(host, page_addr); - wait = true; - break; - - case NAND_CMD_READ0: - /* we read the entire page for now */ - WARN_ON(column != 0); - - host->use_ecc = true; - set_address(host, 0, page_addr); - update_rw_regs(host, ecc->steps, true, 0); - break; - - case NAND_CMD_SEQIN: - WARN_ON(column != 0); - set_address(host, 0, page_addr); - break; - - case NAND_CMD_PAGEPROG: - case NAND_CMD_STATUS: - case NAND_CMD_NONE: - default: - break; - } - - if (ret) { - dev_err(nandc->dev, "failure executing command %d\n", - command); - free_descs(nandc); - return; - } - - if (wait) { - ret = submit_descs(nandc); - if (ret) - dev_err(nandc->dev, - "failure submitting descs for command %d\n", - command); - } - - free_descs(nandc); - - post_command(host, command); -} - /* * when using BCH ECC, the HW flags an error in NAND_FLASH_STATUS if it read * an erased CW, and reports an erased CW in NAND_ERASED_CW_DETECT_STATUS. @@ -2533,64 +2240,6 @@ static int qcom_nandc_block_markbad(struct nand_chip *chip, loff_t ofs) return nand_prog_page_end_op(chip); } -/* - * the three functions below implement chip->legacy.read_byte(), - * chip->legacy.read_buf() and chip->legacy.write_buf() respectively. these - * aren't used for reading/writing page data, they are used for smaller data - * like reading id, status etc - */ -static uint8_t qcom_nandc_read_byte(struct nand_chip *chip) -{ - struct qcom_nand_host *host = to_qcom_nand_host(chip); - struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip); - u8 *buf = nandc->data_buffer; - u8 ret = 0x0; - - if (host->last_command == NAND_CMD_STATUS) { - ret = host->status; - - host->status = NAND_STATUS_READY | NAND_STATUS_WP; - - return ret; - } - - if (nandc->buf_start < nandc->buf_count) - ret = buf[nandc->buf_start++]; - - return ret; -} - -static void qcom_nandc_read_buf(struct nand_chip *chip, uint8_t *buf, int len) -{ - struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip); - int real_len = min_t(size_t, len, nandc->buf_count - nandc->buf_start); - - memcpy(buf, nandc->data_buffer + nandc->buf_start, real_len); - nandc->buf_start += real_len; -} - -static void qcom_nandc_write_buf(struct nand_chip *chip, const uint8_t *buf, - int len) -{ - struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip); - int real_len = min_t(size_t, len, nandc->buf_count - nandc->buf_start); - - memcpy(nandc->data_buffer + nandc->buf_start, buf, real_len); - - nandc->buf_start += real_len; -} - -/* we support only one external chip for now */ -static void qcom_nandc_select_chip(struct nand_chip *chip, int chipnr) -{ - struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip); - - if (chipnr <= 0) - return; - - dev_warn(nandc->dev, "invalid chip select\n"); -} - /* * NAND controller page layout info * @@ -3663,14 +3312,6 @@ static int qcom_nand_host_init_and_register(struct qcom_nand_controller *nandc, mtd->owner = THIS_MODULE; mtd->dev.parent = dev; - chip->legacy.cmdfunc = qcom_nandc_command; - chip->legacy.select_chip = qcom_nandc_select_chip; - chip->legacy.read_byte = qcom_nandc_read_byte; - chip->legacy.read_buf = qcom_nandc_read_buf; - chip->legacy.write_buf = qcom_nandc_write_buf; - chip->legacy.set_features = nand_get_set_features_notsupp; - chip->legacy.get_features = nand_get_set_features_notsupp; - /* * the bad block marker is readable only when we read the last codeword * of a page with ECC disabled. currently, the nand_base and nand_bbt -- 2.17.1