From patchwork Tue Apr 9 03:22:52 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mason Yang X-Patchwork-Id: 1081766 X-Patchwork-Delegate: miquel.raynal@bootlin.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=lists.infradead.org (client-ip=2607:7c80:54:e::133; helo=bombadil.infradead.org; envelope-from=linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=mxic.com.tw Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="qLawv2qX"; dkim-atps=neutral Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 44dXDB2L91z9sRC for ; Tue, 9 Apr 2019 13:03:22 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To: References:List-Owner; bh=qsLCjmihlPE28BOgBLEicGv+Dzqrycx6q/nMJ/LzQlU=; b=qLa wv2qXNU/mjNuE8eFxjZcfw54BYFWmLjhwLDmFWk0vt0My7OF4S3ssv0ST7jLjxlqWkrcdQV/9BBqX dn37n+ysWXOQfXCHHSOSPApUrTXEG3zP3XdnLd+BYh8ix+u4/uedWAY2dZCZHDqBApq16KblWB1uw zDs8i1GKVFTIjQxVSgdBV5zdZ7Uu1GutGb47po5B3JUf7n7FqiAuFPcAZGo2M904VCjPUflSYmnzZ zEM19W83c6spoyQtWJXsmd/L1jxrVm3KbHnejrJwxmrjhqdccLFghQ6BVyA/nFNO2PadpEFnndJLM d+DNoE1ZL1eC91+V5gstPLvZ4+bGtQQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hDh2a-0005f6-Sr; Tue, 09 Apr 2019 03:03:16 +0000 Received: from twhmllg3.macronix.com ([211.75.127.131]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1hDh2X-0005ec-Ub for linux-mtd@lists.infradead.org; Tue, 09 Apr 2019 03:03:15 +0000 Received: from localhost.localdomain ([172.17.195.96]) by TWHMLLG3.macronix.com with ESMTP id x3932mNJ092915; Tue, 9 Apr 2019 11:02:48 +0800 (GMT-8) (envelope-from masonccyang@mxic.com.tw) From: Mason Yang To: bbrezillon@kernel.org, marek.vasut@gmail.com, linux-kernel@vger.kernel.org, miquel.raynal@bootlin.com, dwmw2@infradead.org, computersforpeace@gmail.com, richard@nod.at, linux-mtd@lists.infradead.org Subject: [PATCH] mtd: rawnand: Add Macronix NAND read retry and randomizer support Date: Tue, 9 Apr 2019 11:22:52 +0800 Message-Id: <1554780172-23111-1-git-send-email-masonccyang@mxic.com.tw> X-Mailer: git-send-email 1.9.1 X-MAIL: TWHMLLG3.macronix.com x3932mNJ092915 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190408_200314_264012_8040707D X-CRM114-Status: GOOD ( 11.51 ) X-Spam-Score: -0.0 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [211.75.127.131 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: juliensu@mxic.com.tw, Mason Yang , zhengxunli@mxic.com.tw MIME-Version: 1.0 Sender: "linux-mtd" Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org Add a driver for Macronix NAND read retry and randomizer. Signed-off-by: Mason Yang --- drivers/mtd/nand/raw/nand_macronix.c | 169 +++++++++++++++++++++++++++++++++++ 1 file changed, 169 insertions(+) diff --git a/drivers/mtd/nand/raw/nand_macronix.c b/drivers/mtd/nand/raw/nand_macronix.c index 47d8cda..a19caa4 100644 --- a/drivers/mtd/nand/raw/nand_macronix.c +++ b/drivers/mtd/nand/raw/nand_macronix.c @@ -17,6 +17,174 @@ #include "internals.h" +#define MACRONIX_READ_RETRY_BIT BIT(0) +#define MACRONIX_RANDOMIZER_BIT BIT(1) +#define MACRONIX_READ_RETRY_MODE 5 + +#define ONFI_FEATURE_ADDR_MXIC_RANDOMIZER 0xB0 + +struct nand_onfi_vendor_macronix { + u8 reserved[1]; + u8 reliability_func; +} __packed; + +struct nand_chip *mxic_sysfs; + +static int macronix_nand_setup_read_retry(struct nand_chip *chip, int mode) +{ + u8 feature[ONFI_SUBFEATURE_PARAM_LEN] = {0}; + int ret; + + if (mode > MACRONIX_READ_RETRY_MODE) + mode = MACRONIX_READ_RETRY_MODE; + + feature[0] = mode; + ret = nand_set_features(chip, ONFI_FEATURE_ADDR_READ_RETRY, feature); + if (ret) + pr_err("failed to enter read retry moded:%d\n", mode); + + if (mode == 0) + ret = nand_get_features(chip, ONFI_FEATURE_ADDR_READ_RETRY, + feature); + if (ret) + pr_err("failed to exits read retry moded:%d\n", mode); + + return ret; +} + +static ssize_t mxic_nand_rand_type_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + struct nand_chip *chip = mxic_sysfs; + u8 feature[ONFI_SUBFEATURE_PARAM_LEN] = {0}; + int ret; + + nand_select_target(chip, 0); + ret = nand_get_features(chip, ONFI_FEATURE_ADDR_MXIC_RANDOMIZER, + feature); + nand_deselect_target(chip); + if (ret) + pr_err("failed to check mxic nand device randomizer\n"); + + return sprintf(buf, "MXIC NAND device randomizer %s(0x%x)\n", + feature[0] & MACRONIX_RANDOMIZER_BIT ? + "enable" : "disable", feature[0]); +} + +static ssize_t mxic_nand_rand_type_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t count) +{ + struct nand_chip *chip = mxic_sysfs; + u8 feature[ONFI_SUBFEATURE_PARAM_LEN] = {0}; + unsigned int rand_layout; + int ret; + + nand_select_target(chip, 0); + ret = nand_get_features(chip, ONFI_FEATURE_ADDR_MXIC_RANDOMIZER, + feature); + nand_deselect_target(chip); + + if (feature[0]) { + pr_err("Randomizer is enabled 0x%x\n", feature[0]); + goto err_out; + } + + ret = kstrtouint(buf, 0, &rand_layout); + if (ret) + goto err_out; + + if (rand_layout > 7) { + pr_err("Error parameter value:0x%x\n", rand_layout); + goto err_out; + } + + feature[0] = rand_layout & 0x07; + nand_select_target(chip, 0); + ret = nand_set_features(chip, ONFI_FEATURE_ADDR_MXIC_RANDOMIZER, + feature); + nand_deselect_target(chip); + if (ret) { + pr_err("device randomizer set feature failed\n"); + goto err_out; + } + + feature[0] = 0x0; + nand_select_target(chip, 0); + ret = nand_prog_page_op(chip, 0, 0, feature, 1); + nand_deselect_target(chip); + if (ret) { + pr_err("Prog device randomizer failed\n"); + goto err_out; + } + + feature[0] = 0x0; + nand_select_target(chip, 0); + ret = nand_set_features(chip, ONFI_FEATURE_ADDR_MXIC_RANDOMIZER, + feature); + nand_deselect_target(chip); + if (ret) + pr_err("failed to exits prog device randomizer\n"); + +err_out: + return count; +} + +static const struct kobj_attribute sysfs_mxic_nand = + __ATTR(nand_random, S_IRUGO | S_IWUSR, + mxic_nand_rand_type_show, + mxic_nand_rand_type_store); + +static void macronix_nand_onfi_init(struct nand_chip *chip) +{ + struct nand_parameters *p = &chip->parameters; + struct kobject *kobj; + int ret; + + mxic_sysfs = chip; + if (p->onfi) { + struct nand_onfi_vendor_macronix *mxic = + (void *)p->onfi->vendor; + + if (mxic->reliability_func & MACRONIX_READ_RETRY_BIT) { + chip->read_retries = MACRONIX_READ_RETRY_MODE + 1; + chip->setup_read_retry = + macronix_nand_setup_read_retry; + if (p->supports_set_get_features) { + set_bit(ONFI_FEATURE_ADDR_READ_RETRY, + p->set_feature_list); + set_bit(ONFI_FEATURE_ADDR_READ_RETRY, + p->get_feature_list); + } + } + + if (mxic->reliability_func & MACRONIX_RANDOMIZER_BIT) { + if (p->supports_set_get_features) { + set_bit(ONFI_FEATURE_ADDR_MXIC_RANDOMIZER, + p->set_feature_list); + set_bit(ONFI_FEATURE_ADDR_MXIC_RANDOMIZER, + p->get_feature_list); + /* + * create syfs-fs for MXIC NAND device + * randomizer status check & enable + * operations. + */ + kobj = kobject_create_and_add("mxic_rand_nand", + NULL); + if (!kobj) + return; + + ret = sysfs_create_file(kobj, + &sysfs_mxic_nand.attr); + if (ret) { + pr_err("Err: mxic_rand_nand sysfs"); + kobject_put(kobj); + } + } + } + } +} + /* * Macronix AC series does not support using SET/GET_FEATURES to change * the timings unlike what is declared in the parameter page. Unflag @@ -65,6 +233,7 @@ static int macronix_nand_init(struct nand_chip *chip) chip->bbt_options |= NAND_BBT_SCAN2NDPAGE; macronix_nand_fix_broken_get_timings(chip); + macronix_nand_onfi_init(chip); return 0; }