From patchwork Mon Feb 17 06:56:39 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mason Yang X-Patchwork-Id: 1239000 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) 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.a=rsa-sha256 header.s=bombadil.20170209 header.b=fDa/eRVO; dkim-atps=neutral Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 48LZZj6lYCz9sPk for ; Mon, 17 Feb 2020 17:58:37 +1100 (AEDT) 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:References: In-Reply-To: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:List-Owner; bh=N7qhHhvmDLx9bHwa/xUp31MXwXA783WA0JZjUdd76GE=; b=fDa/eRVOw0Kdx1MsdTObQb2lOA J8nqYTlpu+bD7bxmlbuoSvFjsPZz0eCG3yclutQxXe4/WeSdQ86qIGYZHQotAL8kej71EfqUVVjE0 Rx0RnrF6ngLpyyjRZTn3nON0dYyUgZ9cgnOtyHR9b2yHFh0fGy4PaKfonwk+x999+cnOjuA5diEUy FPHu/Xnp6Xzbd5WD4/4S3zZjnC7HypB5MqCPRur2M5ESqtzUypG4bpj370m1ntLTxmg9/v6BlTp2X 1LA2QTwH3KcZgYRiYo+j97AFUjsjoBpGrJJaDZAZ4UB5k+A/S4ovRGcdT0soI3pWluweovFgibAgY TVgVpJDw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1j3aMH-0001zz-Gp; Mon, 17 Feb 2020 06:58:21 +0000 Received: from twhmllg3.macronix.com ([211.75.127.131]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1j3aLk-0001Y5-4l for linux-mtd@lists.infradead.org; Mon, 17 Feb 2020 06:57:50 +0000 Received: from localhost.localdomain ([172.17.195.96]) by TWHMLLG3.macronix.com with ESMTP id 01H6ug7Q005796; Mon, 17 Feb 2020 14:56:43 +0800 (GMT-8) (envelope-from masonccyang@mxic.com.tw) From: Mason Yang To: miquel.raynal@bootlin.com, richard@nod.at, vigneshr@ti.com, robh+dt@kernel.org, mark.rutland@arm.com Subject: [PATCH v5 1/2] mtd: rawnand: Add support for Macronix NAND randomizer Date: Mon, 17 Feb 2020 14:56:39 +0800 Message-Id: <1581922600-25461-2-git-send-email-masonccyang@mxic.com.tw> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1581922600-25461-1-git-send-email-masonccyang@mxic.com.tw> References: <1581922600-25461-1-git-send-email-masonccyang@mxic.com.tw> X-MAIL: TWHMLLG3.macronix.com 01H6ug7Q005796 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200216_225748_450331_FE3257EB X-CRM114-Status: GOOD ( 12.13 ) X-Spam-Score: 0.0 (/) X-Spam-Report: SpamAssassin version 3.4.3 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_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, juliensu@mxic.com.tw, yuehaibing@huawei.com, linux-kernel@vger.kernel.org, frieder.schrempf@kontron.de, linux-mtd@lists.infradead.org, tglx@linutronix.de, Mason Yang , allison@lohutok.net MIME-Version: 1.0 Sender: "linux-mtd" Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org Macronix NANDs support randomizer operation for user data scrambled, which can be enabled with a SET_FEATURE. User data written to the NAND device without randomizer is still readable after randomizer function enabled. The penalty of randomizer are subpage accesses prohibited and more time period is needed in program operation and entering deep power-down mode. i.e., tPROG 300us to 340us(randomizer enabled) For more high-reliability concern, if subpage write not available with hardware ECC and then to enable randomizer is recommended by default. Driver checks byte 167 of Vendor Blocks in ONFI parameter page table to see if this high-reliability function is supported. By adding a new specific DT property in children nodes to enable randomizer function. Signed-off-by: Mason Yang Reviewed-by: Miquel Raynal --- drivers/mtd/nand/raw/nand_macronix.c | 81 ++++++++++++++++++++++++++++++++++++ 1 file changed, 81 insertions(+) diff --git a/drivers/mtd/nand/raw/nand_macronix.c b/drivers/mtd/nand/raw/nand_macronix.c index 3ff7ce0..0a2fe25 100644 --- a/drivers/mtd/nand/raw/nand_macronix.c +++ b/drivers/mtd/nand/raw/nand_macronix.c @@ -11,6 +11,19 @@ #define MACRONIX_READ_RETRY_BIT BIT(0) #define MACRONIX_NUM_READ_RETRY_MODES 6 +#define ONFI_FEATURE_ADDR_MXIC_RANDOMIZER 0xB0 +#define MACRONIX_RANDOMIZER_BIT BIT(1) +#define MACRONIX_RANDOMIZER_ENPGM BIT(0) +#define MACRONIX_RANDOMIZER_RANDEN BIT(1) +#define MACRONIX_RANDOMIZER_RANDOPT BIT(2) +#define MACRONIX_RANDOMIZER_MODE_ENTER \ + (MACRONIX_RANDOMIZER_ENPGM | \ + MACRONIX_RANDOMIZER_RANDEN | \ + MACRONIX_RANDOMIZER_RANDOPT) +#define MACRONIX_RANDOMIZER_MODE_EXIT \ + (MACRONIX_RANDOMIZER_RANDEN | \ + MACRONIX_RANDOMIZER_RANDOPT) + struct nand_onfi_vendor_macronix { u8 reserved; u8 reliability_func; @@ -29,15 +42,83 @@ static int macronix_nand_setup_read_retry(struct nand_chip *chip, int mode) return nand_set_features(chip, ONFI_FEATURE_ADDR_READ_RETRY, feature); } +static int macronix_nand_randomizer_check_enable(struct nand_chip *chip) +{ + u8 feature[ONFI_SUBFEATURE_PARAM_LEN]; + int ret; + + ret = nand_get_features(chip, ONFI_FEATURE_ADDR_MXIC_RANDOMIZER, + feature); + if (ret < 0) + return ret; + + if (feature[0]) + return feature[0]; + + feature[0] = MACRONIX_RANDOMIZER_MODE_ENTER; + ret = nand_set_features(chip, ONFI_FEATURE_ADDR_MXIC_RANDOMIZER, + feature); + if (ret < 0) + return ret; + + /* RANDEN and RANDOPT OTP bits are programmed */ + feature[0] = 0x0; + ret = nand_prog_page_op(chip, 0, 0, feature, 1); + if (ret < 0) + return ret; + + ret = nand_get_features(chip, ONFI_FEATURE_ADDR_MXIC_RANDOMIZER, + feature); + if (ret < 0) + return ret; + + feature[0] &= MACRONIX_RANDOMIZER_MODE_EXIT; + ret = nand_set_features(chip, ONFI_FEATURE_ADDR_MXIC_RANDOMIZER, + feature); + if (ret < 0) + return ret; + + return 0; +} + static void macronix_nand_onfi_init(struct nand_chip *chip) { struct nand_parameters *p = &chip->parameters; struct nand_onfi_vendor_macronix *mxic; + struct device_node *dn = nand_get_flash_node(chip); + int rand_otp = 0; + int ret; if (!p->onfi) return; + if (of_find_property(dn, "mxic,enable-randomizer-otp", NULL)) + rand_otp = 1; + mxic = (struct nand_onfi_vendor_macronix *)p->onfi->vendor; + /* Subpage write is prohibited in randomizer operatoin */ + if (rand_otp && chip->options & NAND_NO_SUBPAGE_WRITE && + mxic->reliability_func & MACRONIX_RANDOMIZER_BIT) { + if (p->supports_set_get_features) { + bitmap_set(p->set_feature_list, + ONFI_FEATURE_ADDR_MXIC_RANDOMIZER, 1); + bitmap_set(p->get_feature_list, + ONFI_FEATURE_ADDR_MXIC_RANDOMIZER, 1); + ret = macronix_nand_randomizer_check_enable(chip); + if (ret < 0) { + bitmap_clear(p->set_feature_list, + ONFI_FEATURE_ADDR_MXIC_RANDOMIZER, + 1); + bitmap_clear(p->get_feature_list, + ONFI_FEATURE_ADDR_MXIC_RANDOMIZER, + 1); + pr_info("Macronix NAND randomizer failed\n"); + } else { + pr_info("Macronix NAND randomizer enabled\n"); + } + } + } + if ((mxic->reliability_func & MACRONIX_READ_RETRY_BIT) == 0) return;