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 X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3F3BBC10DCE for ; Wed, 18 Mar 2020 07:44:09 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 121E120768 for ; Wed, 18 Mar 2020 07:44:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="OtzLMQa4" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 121E120768 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=mxic.com.tw Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org 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=/5v7nRGgmvACGgVNsNvqjCMdQw0zgtvcsQr+6RGGD1g=; b=OtzLMQa4EcGl/6VTOdngOH4tZ/ gV1uCk7mStxds89gpcgXvnsKeIkBqgqlI+m6uy7Z8gQ2MoUBdnq7u9ts+ICqyHqEQyyrvVmOIUnYP Fpk86ZZ0J9lQM68BWJijf2nCiQ3XjqSrdtr1a935o42YMyVaxVSwY0lbdOU5aTMc2XveTWBmpHO8P m9sgFiVRznAws2tKZvBj2Mcn9crFfOsH3hHWkX/v6+E7bg+jTycbYJ6SfxqGxHLqjeG1d+r/onT3n 5sHxhaMVWRqE5XOxquKIjQSBhKwdySzHt+Yr6cYRLZ+873D8xU1JqavndjPHOH93vBgh8qQ0Lb3e2 G6A9T/2g==; 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 1jETMl-0005yN-MT; Wed, 18 Mar 2020 07:43:51 +0000 Received: from twhmllg4.macronix.com ([122.147.135.202]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jETMP-0005bo-P0 for linux-mtd@lists.infradead.org; Wed, 18 Mar 2020 07:43:32 +0000 Received: from localhost.localdomain ([172.17.195.96]) by TWHMLLG4.macronix.com with ESMTP id 02I7gTOB041137; Wed, 18 Mar 2020 15:42:31 +0800 (GMT-8) (envelope-from masonccyang@mxic.com.tw) From: Mason Yang To: miquel.raynal@bootlin.com, richard@nod.at, vigneshr@ti.com, bbrezillon@kernel.org Subject: [PATCH v4 2/2] mtd: rawnand: macronix: Add support for deep power down mode Date: Wed, 18 Mar 2020 15:42:28 +0800 Message-Id: <1584517348-14486-3-git-send-email-masonccyang@mxic.com.tw> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1584517348-14486-1-git-send-email-masonccyang@mxic.com.tw> References: <1584517348-14486-1-git-send-email-masonccyang@mxic.com.tw> X-MAIL: TWHMLLG4.macronix.com 02I7gTOB041137 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200318_004330_088811_0020764C X-CRM114-Status: GOOD ( 10.05 ) 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: juliensu@mxic.com.tw, s.hauer@pengutronix.de, yuehaibing@huawei.com, linux-kernel@vger.kernel.org, stefan@agner.ch, linux-mtd@lists.infradead.org, frieder.schrempf@kontron.de, tglx@linutronix.de, Mason Yang , allison@lohutok.net MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org Macronix AD series support deep power down mode for a minimum power consumption state. Overload nand_suspend() & nand_resume() in Macronix specific code to support deep power down mode. Signed-off-by: Mason Yang --- drivers/mtd/nand/raw/nand_macronix.c | 74 ++++++++++++++++++++++++++++++++++++ 1 file changed, 74 insertions(+) diff --git a/drivers/mtd/nand/raw/nand_macronix.c b/drivers/mtd/nand/raw/nand_macronix.c index 3ff7ce0..756c175 100644 --- a/drivers/mtd/nand/raw/nand_macronix.c +++ b/drivers/mtd/nand/raw/nand_macronix.c @@ -6,11 +6,14 @@ * Author: Boris Brezillon */ +#include "linux/delay.h" #include "internals.h" #define MACRONIX_READ_RETRY_BIT BIT(0) #define MACRONIX_NUM_READ_RETRY_MODES 6 +#define MXIC_CMD_POWER_DOWN 0xB9 + struct nand_onfi_vendor_macronix { u8 reserved; u8 reliability_func; @@ -91,6 +94,76 @@ static void macronix_nand_fix_broken_get_timings(struct nand_chip *chip) ONFI_FEATURE_ADDR_TIMING_MODE, 1); } +static int nand_power_down_op(struct nand_chip *chip) +{ + int ret; + + if (nand_has_exec_op(chip)) { + struct nand_op_instr instrs[] = { + NAND_OP_CMD(MXIC_CMD_POWER_DOWN, 0), + }; + + struct nand_operation op = NAND_OPERATION(chip->cur_cs, instrs); + + ret = nand_exec_op(chip, &op); + if (ret) + return ret; + + } else { + chip->legacy.cmdfunc(chip, MXIC_CMD_POWER_DOWN, -1, -1); + } + + return 0; +} + +static int mxic_nand_suspend(struct nand_chip *chip) +{ + int ret; + + nand_select_target(chip, 0); + ret = nand_power_down_op(chip); + if (ret < 0) + pr_err("Suspending MXIC NAND chip failed (%d)\n", ret); + nand_deselect_target(chip); + + return ret; +} + +static void mxic_nand_resume(struct nand_chip *chip) +{ + /* + * Toggle #CS pin to resume NAND device and don't care + * of the others CLE, #WE, #RE pins status. + * A NAND controller ensure it is able to assert/de-assert #CS + * by sending any byte over the NAND bus. + * i.e., + * NAND power down command or reset command w/o R/B# status checking. + */ + nand_select_target(chip, 0); + nand_power_down_op(chip); + /* The minimum of a recovery time tRDP is 35 us */ + usleep_range(35, 100); + nand_deselect_target(chip); +} + +static void macronix_nand_deep_power_down_support(struct nand_chip *chip) +{ + int i; + static const char * const deep_power_down_dev[] = { + "MX30UF1G28AD", + "MX30UF2G28AD", + "MX30UF4G28AD", + }; + + i = match_string(deep_power_down_dev, ARRAY_SIZE(deep_power_down_dev), + chip->parameters.model); + if (i < 0) + return; + + chip->suspend = mxic_nand_suspend; + chip->resume = mxic_nand_resume; +} + static int macronix_nand_init(struct nand_chip *chip) { if (nand_is_slc(chip)) @@ -98,6 +171,7 @@ static int macronix_nand_init(struct nand_chip *chip) macronix_nand_fix_broken_get_timings(chip); macronix_nand_onfi_init(chip); + macronix_nand_deep_power_down_support(chip); return 0; } -- 1.9.1 ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/