From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 679E4C7EE23 for ; Fri, 26 May 2023 17:27:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229966AbjEZR1j (ORCPT ); Fri, 26 May 2023 13:27:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44288 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229923AbjEZR1i (ORCPT ); Fri, 26 May 2023 13:27:38 -0400 Received: from relay6-d.mail.gandi.net (relay6-d.mail.gandi.net [IPv6:2001:4b98:dc4:8::226]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9818CF7; Fri, 26 May 2023 10:27:36 -0700 (PDT) X-GND-Sasl: miquel.raynal@bootlin.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1685122055; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=sLLkkTARqYG2/kq9zm8hqhnR4AX8Ph/c88jn0yKAnqU=; b=j6AmoKuokt9TL+mjt11P5LSYrljI4dAEec4BwDJ6vF3J5DeiGOkx5kcRtPk4dBcV1Q5l0i uKGtfCsVvoD842m+YZ5yJXxCAlWb0/l9bSXIVd7Tn8YBNcKbBhoPOFdy4zk/wF19fFQ4Ix wCnpJh9Og2gf/56IaDe/wkAtqvTd0hTF2BEncqDhoU4LiIXOSgPNR8eNN9AOt0Evro1Xak y6GLycoh4ZHTY7pbaKunrX/+IvNuvthcRHGabMvvh6NnHaoqhGXw3fAKb4bU0C6N+dlKxW OFR2lzz3nxyl7WK9CqUV7umUJrhKyiiCec2QEDFpGxv4BEr0frzgVVLSQ9727A== X-GND-Sasl: miquel.raynal@bootlin.com X-GND-Sasl: miquel.raynal@bootlin.com X-GND-Sasl: miquel.raynal@bootlin.com X-GND-Sasl: miquel.raynal@bootlin.com X-GND-Sasl: miquel.raynal@bootlin.com X-GND-Sasl: miquel.raynal@bootlin.com X-GND-Sasl: miquel.raynal@bootlin.com Received: by mail.gandi.net (Postfix) with ESMTPSA id 77D28C0003; Fri, 26 May 2023 17:27:34 +0000 (UTC) Date: Fri, 26 May 2023 19:27:33 +0200 From: Miquel Raynal To: Md Sadre Alam Cc: , , , , , , Subject: Re: [PATCH v2 2/5] mtd: rawnand: qcom: Add support for reset, readid, status exec_op Message-ID: <20230526192733.003b5293@xps-13> In-Reply-To: References: <20230511133017.6307-1-quic_mdalam@quicinc.com> <20230511133017.6307-3-quic_mdalam@quicinc.com> <20230522154507.0255d902@xps-13> Organization: Bootlin X-Mailer: Claws Mail 4.0.0 (GTK+ 3.24.33; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Hi Md, quic_mdalam@quicinc.com wrote on Wed, 24 May 2023 14:54:34 +0530: > On 5/22/2023 7:15 PM, Miquel Raynal wrote: > > Hi Md, > >=20 > > quic_mdalam@quicinc.com wrote on Thu, 11 May 2023 19:00:14 +0530: > > =20 > >> This change will add exec_ops support for RESET , READ_ID, STATUS > >> command. > >> > >> Co-developed-by: Sricharan Ramabadhran > >> Signed-off-by: Sricharan Ramabadhran > >> Signed-off-by: Md Sadre Alam > >> --- > >> Change in [v2] > >> > >> * Missed to post Cover-letter, so posting v2 patch with cover-letter > >> > >> drivers/mtd/nand/raw/qcom_nandc.c | 166 ++++++++++++++++++++++++++++= +- > >> 1 file changed, 163 insertions(+), 3 deletions(-) > >> > >> diff --git a/drivers/mtd/nand/raw/qcom_nandc.c b/drivers/mtd/nand/raw/= qcom_nandc.c > >> index dae460e2aa0b..d2f2a8971907 100644 > >> --- a/drivers/mtd/nand/raw/qcom_nandc.c > >> +++ b/drivers/mtd/nand/raw/qcom_nandc.c > >> @@ -384,6 +384,9 @@ struct nandc_regs { > >> * @reg_read_pos: marker for data read in reg_read_buf > >> * > >> * @cmd1/vld: some fixed controller register values > >> + * > >> + * @exec_opwrite: flag to select correct number of code word > >> + * while reading status > >> */ > >> struct qcom_nand_controller { > >> struct device *dev; > >> @@ -434,6 +437,7 @@ struct qcom_nand_controller { > >> int reg_read_pos; =20 > >> >> u32 cmd1, vld; =20 > >> + bool exec_opwrite; > >> }; =20 > >> >> /* =20 > >> @@ -2920,6 +2924,8 @@ static int qcom_op_cmd_mapping(struct qcom_nand_= controller *nandc, u8 cmd, > >> break; > >> case NAND_CMD_PAGEPROG: > >> ret =3D OP_PROGRAM_PAGE; > >> + q_op->flag =3D NAND_CMD_PAGEPROG; =20 > >=20 > > Just use the instruction value? =20 >=20 > Sure , will fix this in next patch V3. > > =20 > >> + nandc->exec_opwrite =3D true; > >> break; > >> default: > >> break; > >> @@ -2982,10 +2988,95 @@ static void qcom_parse_instructions(struct nan= d_chip *chip, > >> } > >> } =20 > >> >> +static void qcom_delay_ns(unsigned int ns) =20 > >> +{ > >> + if (!ns) > >> + return; > >> + > >> + if (ns < 10000) > >> + ndelay(ns); > >> + else > >> + udelay(DIV_ROUND_UP(ns, 1000)); > >> +} > >> + > >> +static int qcom_wait_rdy_poll(struct nand_chip *chip, unsigned int ti= me_ms) > >> +{ > >> + struct qcom_nand_controller *nandc =3D get_qcom_nand_controller(chip= ); > >> + unsigned long start =3D jiffies + msecs_to_jiffies(time_ms); > >> + u32 flash; > >> + > >> + nandc_read_buffer_sync(nandc, true); > >> + > >> + do { > >> + flash =3D le32_to_cpu(nandc->reg_read_buf[0]); > >> + if (flash & FS_READY_BSY_N) > >> + return 0; > >> + cpu_relax(); > >> + } while (time_after(start, jiffies)); > >> + > >> + dev_err(nandc->dev, "Timeout waiting for device to be ready:0x%08x\n= ", flash); > >> + > >> + return -ETIMEDOUT; > >> +} > >> + > >> static int qcom_read_status_exec(struct nand_chip *chip, > >> const struct nand_subop *subop) > >> { > >> - return 0; > >> + struct qcom_nand_host *host =3D to_qcom_nand_host(chip); > >> + struct qcom_nand_controller *nandc =3D get_qcom_nand_controller(chip= ); > >> + struct nand_ecc_ctrl *ecc =3D &chip->ecc; > >> + struct qcom_op q_op; > >> + const struct nand_op_instr *instr =3D NULL; > >> + unsigned int op_id =3D 0; > >> + unsigned int len =3D 0; > >> + int ret =3D 0, num_cw =3D 1, i; > >> + u32 flash_status; > >> + > >> + host->status =3D NAND_STATUS_READY | NAND_STATUS_WP; > >> + > >> + qcom_parse_instructions(chip, subop, &q_op); > >> + > >> + if (nandc->exec_opwrite) { =20 > >=20 > > I definitely don't understand this flag at all. =20 >=20 > This flag is to get the status for all code word in case of program pa= ge operation. > Since this read status is common for reading status for all kind of op= eration. > so in page program operation it needs to get status for all code word = i.e 4 in 2K page. > but for normal operation number of code word will be 1. Then you don't need that dark flag, just ask for a number of CW to check. It will always be 1 unless you're in a page helper and want as many CW as chunks. > > =20 > >> + num_cw =3D ecc->steps; > >> + nandc->exec_opwrite =3D false; > >> + } > >> + Thanks, Miqu=C3=A8l From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id F3646C77B7A for ; Fri, 26 May 2023 17:28:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: 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2023 17:27:34 +0000 (UTC) Date: Fri, 26 May 2023 19:27:33 +0200 From: Miquel Raynal To: Md Sadre Alam Cc: , , , , , , Subject: Re: [PATCH v2 2/5] mtd: rawnand: qcom: Add support for reset, readid, status exec_op Message-ID: <20230526192733.003b5293@xps-13> In-Reply-To: References: <20230511133017.6307-1-quic_mdalam@quicinc.com> <20230511133017.6307-3-quic_mdalam@quicinc.com> <20230522154507.0255d902@xps-13> Organization: Bootlin X-Mailer: Claws Mail 4.0.0 (GTK+ 3.24.33; x86_64-pc-linux-gnu) MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230526_102739_880952_8975889C X-CRM114-Status: GOOD ( 28.83 ) X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-mtd" Errors-To: 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