From patchwork Thu Mar 17 10:12:15 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: 12783854 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 B9EAAC433EF for ; Thu, 17 Mar 2022 10:22:49 +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=xg1axsO7kFuWDCNa0JaPC9cvUJ1RJ3qCwizN9pCu8gA=; b=msYmJVVfuhi668 gqSc5hGOtJOGRAxS9Di6EQKD+NKqRLc54GAdKhk2e31g2QQl9501YRBC2MiKG5T38e6e4kiwqIDod OhhtgZ1snl4S+yzwhtiC5U/4e2yaz4RWOxcvp6A7FeLPoF76IMC95GRFapSmZin22E6+ztbLJ5Z7t 6XYB1GFVgR4ez/xTmGnxP9N0EjXjLLXGTEn+x61BprQiGS86f1P7/zZJ4wj3feiF/dopLZmMxbzpL QcaM6NkMNXO2eCh1HXxsij4KY72sgDJxZmYo8IZ6+WJmZgDPRs8SNOjRYU+TOeCGLNyf39PUIBMYj 7af2wc3ng69tIlipxSpw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nUnHH-00Fhus-1K; Thu, 17 Mar 2022 10:22:43 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nUnHD-00FhtB-M8; Thu, 17 Mar 2022 10:22:41 +0000 X-UUID: bb0e05b9b4f74b8283a06a97cf8cd2cd-20220317 X-UUID: bb0e05b9b4f74b8283a06a97cf8cd2cd-20220317 Received: from mtkcas66.mediatek.inc [(172.29.193.44)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 413760112; Thu, 17 Mar 2022 03:22:33 -0700 Received: from mtkexhb01.mediatek.inc (172.21.101.102) by MTKMBS62DR.mediatek.inc (172.29.94.18) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 17 Mar 2022 03:12:31 -0700 Received: from mtkcas10.mediatek.inc (172.21.101.39) by mtkexhb01.mediatek.inc (172.21.101.102) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 17 Mar 2022 18:12:23 +0800 Received: from localhost.localdomain (10.17.3.154) by mtkcas10.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Thu, 17 Mar 2022 18:12:21 +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 v7 3/3] mmc: mediatek: add support for SDIO eint wakup IRQ Date: Thu, 17 Mar 2022 18:12:15 +0800 Message-ID: <20220317101215.24985-4-axe.yang@mediatek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220317101215.24985-1-axe.yang@mediatek.com> References: <20220317101215.24985-1-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-20220317_032239_742926_E57D5CA5 X-CRM114-Status: GOOD ( 24.35 ) 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 named "state_dat1" and "state_eint" are 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: &mmcX { ... interrupts-extended = <...>, <&pio xxx IRQ_TYPE_LEVEL_LOW>; ... pinctrl-names = "default", "state_uhs", "state_eint", "state_dat1"; ... pinctrl-2 = <&mmc2_pins_eint>; pinctrl-3 = <&mmc2_pins_dat1>; ... cap-sdio-irq; keep-power-in-suspend; wakeup-source; ... }; Co-developed-by: Yong Mao Signed-off-by: Yong Mao Signed-off-by: Axe Yang --- drivers/mmc/host/mtk-sd.c | 100 +++++++++++++++++++++++++++++++++++--- 1 file changed, 92 insertions(+), 8 deletions(-) diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c index 65037e1d7723..8560d040bacb 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 +441,12 @@ struct msdc_host { struct pinctrl *pinctrl; struct pinctrl_state *pins_default; struct pinctrl_state *pins_uhs; + struct pinctrl_state *pins_eint; + struct pinctrl_state *pins_dat1; struct delayed_work req_timeout; int irq; /* host interrupt */ + int eint_irq; /* interrupt from sdio device for waking up system */ + int sdio_wake_irq_depth; struct reset_control *reset; struct clk *src_clk; /* msdc source clock */ @@ -465,6 +470,7 @@ struct msdc_host { bool hs400_tuning; /* hs400 mode online tuning */ bool internal_cd; /* Use internal card-detect logic */ bool cqhci; /* support eMMC hw cmdq */ + bool sdio_eint_ready; /* Ready to support SDIO eint interrupt */ struct msdc_save_para save_para; /* used when gate HCLK */ struct msdc_tune_para def_tune_para; /* default tune setting */ struct msdc_tune_para saved_tune_para; /* tune result of CMD21/CMD19 */ @@ -1527,10 +1533,12 @@ static void msdc_enable_sdio_irq(struct mmc_host *mmc, int enb) __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 && !mmc_card_enable_async_irq(mmc->card)) { + if (enb) + 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 +2639,23 @@ 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) { + host->pins_eint = pinctrl_lookup_state(host->pinctrl, "state_eint"); + if (IS_ERR(host->pins_eint)) { + dev_dbg(&pdev->dev, "Cannot find pinctrl eint!\n"); + } else { + host->pins_dat1 = pinctrl_lookup_state(host->pinctrl, "state_dat1"); + if (IS_ERR(host->pins_dat1)) { + ret = dev_err_probe(&pdev->dev, PTR_ERR(host->pins_dat1), + "Cannot find pinctrl dat1!\n"); + goto host_free; + } + + host->sdio_eint_ready = true; + } + } + msdc_of_property_parse(pdev, host); host->dev = &pdev->dev; @@ -2722,6 +2747,21 @@ static int msdc_drv_probe(struct platform_device *pdev) if (ret) goto release; + if (host->sdio_eint_ready) { + host->eint_irq = irq_of_parse_and_map(host->dev->of_node, 1); + ret = host->eint_irq ? dev_pm_set_dedicated_wake_irq(host->dev, host->eint_irq) : + -ENODEV; + + if (ret) { + dev_err(host->dev, "Failed to register data1 eint irq!\n"); + goto release; + } + + dev_pm_disable_wake_irq(host->dev); + pinctrl_select_state(host->pinctrl, host->pins_dat1); + } + + device_init_wakeup(host->dev, true); pm_runtime_set_active(host->dev); pm_runtime_set_autosuspend_delay(host->dev, MTK_MMC_AUTOSUSPEND_DELAY); pm_runtime_use_autosuspend(host->dev); @@ -2734,6 +2774,7 @@ static int msdc_drv_probe(struct platform_device *pdev) return 0; end: pm_runtime_disable(host->dev); + dev_pm_clear_wake_irq(host->dev); release: platform_set_drvdata(pdev, NULL); msdc_deinit_hw(host); @@ -2845,6 +2886,16 @@ static int __maybe_unused msdc_runtime_suspend(struct device *dev) struct msdc_host *host = mmc_priv(mmc); msdc_save_reg(host); + + if (host->sdio_eint_ready) { + disable_irq(host->irq); + pinctrl_select_state(host->pinctrl, host->pins_eint); + if (host->sdio_wake_irq_depth == 0) { + dev_pm_enable_wake_irq(dev); + host->sdio_wake_irq_depth++; + } + sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_SDIOIDE); + } msdc_gate_clock(host); return 0; } @@ -2860,12 +2911,25 @@ static int __maybe_unused msdc_runtime_resume(struct device *dev) return ret; msdc_restore_reg(host); + + if (host->sdio_eint_ready) { + if (host->sdio_wake_irq_depth > 0) { + dev_pm_disable_wake_irq(dev); + host->sdio_wake_irq_depth--; + sdr_set_bits(host->base + SDC_CFG, SDC_CFG_SDIOIDE); + } else { + sdr_clr_bits(host->base + MSDC_INTEN, MSDC_INTEN_SDIOIRQ); + } + pinctrl_select_state(host->pinctrl, host->pins_dat1); + enable_irq(host->irq); + } return 0; } -static int __maybe_unused msdc_suspend(struct device *dev) +static int __maybe_unused msdc_suspend_noirq(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) { @@ -2874,16 +2938,36 @@ static int __maybe_unused msdc_suspend(struct device *dev) return ret; } + if (host->sdio_eint_ready) + enable_irq_wake(host->eint_irq); + return pm_runtime_force_suspend(dev); } -static int __maybe_unused msdc_resume(struct device *dev) +static int __maybe_unused msdc_resume_noirq(struct device *dev) { + struct mmc_host *mmc = dev_get_drvdata(dev); + struct msdc_host *host = mmc_priv(mmc); + + if (host->sdio_eint_ready) { + disable_irq_wake(host->eint_irq); + + /* + * In noirq resume stage, msdc_runtime_resume() + * won't be called, so disalbe wake irq here + * to block dedicated wake irq handler callback. + */ + if (likely(host->sdio_wake_irq_depth > 0)) { + dev_pm_disable_wake_irq(dev); + host->sdio_wake_irq_depth--; + } + } + return pm_runtime_force_resume(dev); } static const struct dev_pm_ops msdc_dev_pm_ops = { - SET_SYSTEM_SLEEP_PM_OPS(msdc_suspend, msdc_resume) + SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(msdc_suspend_noirq, msdc_resume_noirq) SET_RUNTIME_PM_OPS(msdc_runtime_suspend, msdc_runtime_resume, NULL) };