From patchwork Wed May 25 01:51:40 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?QXhlIFlhbmcgKOadqOejiik=?= X-Patchwork-Id: 12860681 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 DECB6C433EF for ; Wed, 25 May 2022 02:02:18 +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:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=xhLcOigW5EQHQF5zSRyxgZ2B/jVtADd4CJPrgfcatOw=; b=sPYaVoOtYd4jQ6 TshwehsAFw6edxDHDfkqZT1Us13FekoTtryNHkHYoxvFN9pm7c9kPbEiA6tY+fzzp9Vg5itpDTFQS qMRK0RPCfSgG3CPZhrfxmQ/xDEOBoCOKSrD8Ewdvx25KjfXEE5v8ELdIVKLBFDFZWh+arRQ1366Vw H4vZcnpnzfNRCNuN4BTILucYFQ72Ev+YuGLDzqjYPBspKS+WxO4BXW+AZAvkZivBQDQt4C8nIWTFq 8sdjFwiSNLm3KGaoxXdOIpO72y6SpHgCYgh+DHQDDAto6jpJqsExKYYmALnLVgZWS6VCgcAkMXASU gRthG/kq1HzP8t7HrpXA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1ntgLf-009ila-LH; Wed, 25 May 2022 02:02:07 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1ntgLU-009ikM-RZ; Wed, 25 May 2022 02:01:58 +0000 X-UUID: 9045097ef33745e3a52b9b5c609caef9-20220524 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.5, REQID:459550a2-311d-455b-a932-0961e7f53536, OB:0, LO B:0,IP:0,URL:0,TC:0,Content:-5,EDM:0,RT:0,SF:0,FILE:0,RULE:Release_Ham,ACT ION:release,TS:-5 X-CID-META: VersionHash:2a19b09, CLOUDID:f9b81bb8-3c45-407b-8f66-25095432a27a, C OID:IGNORED,Recheck:0,SF:nil,TC:nil,Content:0,EDM:-3,IP:nil,URL:0,File:nil ,QS:0,BEC:nil X-UUID: 9045097ef33745e3a52b9b5c609caef9-20220524 Received: from mtkcas66.mediatek.inc [(172.29.193.44)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 867910015; Tue, 24 May 2022 19:01:52 -0700 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 24 May 2022 18:51:51 -0700 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by mtkmbs11n2.mediatek.inc (172.21.101.187) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.792.3; Wed, 25 May 2022 09:51:49 +0800 Received: from localhost.localdomain (10.17.3.154) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.792.3 via Frontend Transport; Wed, 25 May 2022 09:51:47 +0800 From: Axe Yang To: Ulf Hansson , Rob Herring , Chaotian Jing , Matthias Brugger , Adrian Hunter CC: Yoshihiro Shimoda , Satya Tangirala , Andy Shevchenko , Wolfram Sang , Axe Yang , Lucas Stach , Eric Biggers , Andrew Jeffery , Stephen Boyd , Kiwoong Kim , Yue Hu , Tian Tao , , , , , , , , Yong Mao Subject: [RESEND v12 3/3] mmc: mediatek: add support for SDIO eint wakup IRQ Date: Wed, 25 May 2022 09:51:40 +0800 Message-ID: <20220525015140.384-4-axe.yang@mediatek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220525015140.384-1-axe.yang@mediatek.com> References: <20220525015140.384-1-axe.yang@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220524_190156_943411_D981A257 X-CRM114-Status: GOOD ( 23.78 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org Add support for eint IRQ when MSDC is used as an SDIO host. This feature requires SDIO device support async IRQ function. With this feature, SDIO host can be awakened by SDIO card in suspend state, without additional pin. MSDC driver will time-share the SDIO DAT1 pin. During suspend, MSDC turn off clock and switch SDIO DAT1 pin to GPIO mode. And during resume, switch GPIO function back to DAT1 mode then turn on clock. Some device tree property should be added or modified in MSDC node to support SDIO eint IRQ. Pinctrls "state_eint" is mandatory. Since this feature depends on asynchronous interrupts, "wakeup-source", "keep-power-in-suspend" and "cap-sdio-irq" flags are necessary, and the interrupts list should be extended(the interrupt named with sdio_wakeup): &mmcX { ... interrupt-names = "msdc", "sdio_wakeup"; interrupts-extended = <...>, <&pio xxx IRQ_TYPE_LEVEL_LOW>; ... pinctrl-names = "default", "state_uhs", "state_eint"; ... pinctrl-2 = <&mmc2_pins_eint>; ... cap-sdio-irq; keep-power-in-suspend; wakeup-source; ... }; Reviewed-by: AngeloGioacchino Del Regno Co-developed-by: Yong Mao Signed-off-by: Yong Mao Signed-off-by: Axe Yang Reviewed-by: Chaotian Jing --- drivers/mmc/host/mtk-sd.c | 80 ++++++++++++++++++++++++++++++++++++--- 1 file changed, 74 insertions(+), 6 deletions(-) diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c index 195dc897188b..2d5b23616df6 100644 --- a/drivers/mmc/host/mtk-sd.c +++ b/drivers/mmc/host/mtk-sd.c @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0-only /* - * Copyright (c) 2014-2015 MediaTek Inc. + * Copyright (c) 2014-2015, 2022 MediaTek Inc. * Author: Chaotian.Jing */ @@ -20,6 +20,7 @@ #include #include #include +#include #include #include #include @@ -440,8 +441,10 @@ struct msdc_host { struct pinctrl *pinctrl; struct pinctrl_state *pins_default; struct pinctrl_state *pins_uhs; + struct pinctrl_state *pins_eint; struct delayed_work req_timeout; int irq; /* host interrupt */ + int eint_irq; /* interrupt from sdio device for waking up system */ struct reset_control *reset; struct clk *src_clk; /* msdc source clock */ @@ -1520,17 +1523,41 @@ static void __msdc_enable_sdio_irq(struct msdc_host *host, int enb) static void msdc_enable_sdio_irq(struct mmc_host *mmc, int enb) { - unsigned long flags; struct msdc_host *host = mmc_priv(mmc); + unsigned long flags; + int ret; spin_lock_irqsave(&host->lock, flags); __msdc_enable_sdio_irq(host, enb); spin_unlock_irqrestore(&host->lock, flags); - if (enb) - pm_runtime_get_noresume(host->dev); - else - pm_runtime_put_noidle(host->dev); + if (mmc_card_enable_async_irq(mmc->card) && host->pins_eint) { + if (enb) { + pinctrl_select_state(host->pinctrl, host->pins_eint); + ret = dev_pm_set_dedicated_wake_irq_reverse(host->dev, host->eint_irq); + + if (ret) { + dev_err(host->dev, "Failed to register SDIO wakeup irq!\n"); + host->pins_eint = NULL; + pm_runtime_get_noresume(host->dev); + } else { + dev_info(host->dev, "SDIO eint irq: %d!\n", host->eint_irq); + device_init_wakeup(host->dev, true); + } + + pinctrl_select_state(host->pinctrl, host->pins_uhs); + } else { + dev_pm_clear_wake_irq(host->dev); + } + } else { + if (enb) { + /* Ensure host->pins_eint is NULL */ + host->pins_eint = NULL; + pm_runtime_get_noresume(host->dev); + } else { + pm_runtime_put_noidle(host->dev); + } + } } static irqreturn_t msdc_cmdq_irq(struct msdc_host *host, u32 intsts) @@ -2631,6 +2658,19 @@ static int msdc_drv_probe(struct platform_device *pdev) goto host_free; } + /* Support for SDIO eint irq ? */ + if ((mmc->pm_caps & MMC_PM_WAKE_SDIO_IRQ) && (mmc->pm_caps & MMC_PM_KEEP_POWER)) { + host->eint_irq = platform_get_irq_byname(pdev, "sdio_wakeup"); + if (host->eint_irq > 0) { + host->pins_eint = pinctrl_lookup_state(host->pinctrl, "state_eint"); + if (IS_ERR(host->pins_eint)) { + dev_err_probe(&pdev->dev, PTR_ERR(host->pins_eint), + "Cannot find pinctrl eint!\n"); + host->pins_eint = NULL; + } + } + } + msdc_of_property_parse(pdev, host); host->dev = &pdev->dev; @@ -2845,6 +2885,12 @@ static int __maybe_unused msdc_runtime_suspend(struct device *dev) struct msdc_host *host = mmc_priv(mmc); msdc_save_reg(host); + + if (sdio_irq_claimed(mmc) && host->pins_eint) { + disable_irq(host->irq); + pinctrl_select_state(host->pinctrl, host->pins_eint); + sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_SDIOIDE); + } msdc_gate_clock(host); return 0; } @@ -2860,12 +2906,19 @@ static int __maybe_unused msdc_runtime_resume(struct device *dev) return ret; msdc_restore_reg(host); + + if (sdio_irq_claimed(mmc) && host->pins_eint) { + sdr_set_bits(host->base + SDC_CFG, SDC_CFG_SDIOIDE); + pinctrl_select_state(host->pinctrl, host->pins_uhs); + enable_irq(host->irq); + } return 0; } static int __maybe_unused msdc_suspend(struct device *dev) { struct mmc_host *mmc = dev_get_drvdata(dev); + struct msdc_host *host = mmc_priv(mmc); int ret; if (mmc->caps2 & MMC_CAP2_CQE) { @@ -2874,11 +2927,26 @@ static int __maybe_unused msdc_suspend(struct device *dev) return ret; } + if (sdio_irq_claimed(mmc) && host->pins_eint) { + pm_runtime_put_sync_suspend(dev); + + return 0; + } + return pm_runtime_force_suspend(dev); } static int __maybe_unused msdc_resume(struct device *dev) { + struct mmc_host *mmc = dev_get_drvdata(dev); + struct msdc_host *host = mmc_priv(mmc); + + if (sdio_irq_claimed(mmc) && host->pins_eint) { + pm_runtime_get_sync(dev); + + return 0; + } + return pm_runtime_force_resume(dev); }