From patchwork Fri Jan 21 07:19:41 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: 12719359 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 8F424C433EF for ; Fri, 21 Jan 2022 07:21:23 +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=wtcz9wB4MvgxdYq6O74nKd/DiZCdaottp7d7E48RX/w=; b=dj2Zmot+Mc8H4c bQPbbYULMfeZSrttTC6FQhhuJRhmd7MbyJHdn/w9FDXVdrBZqcldCXOO4y2I+ymfQ1FXR+Yj9EJL9 T3g7/VF0mqgdJnnTQ+fvSNCdZ9rx1nboIHNWvT6QVJn1JtwB5XbU7zF9JPo8t26XMQ5k50A1J/vMF 5Jigd//22Kg5UI1MFQ1DAeW8cjGPhCISkRo1hQ3cVJmlWIEJfziY086VOu2w1JDalVs7OjzwZ0iEW NUvL48Hv/YfwS/cPky0ehgcKskLMcAcx+7zkOd0PASTyjy0tb9/cdkt6Apmrf9bjmQKZIFTXfH7Yh 9uhmzvxtms8qVSBX/dSw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nAoDN-00E2YO-AG; Fri, 21 Jan 2022 07:20:05 +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 1nAoDI-00E2VF-77; Fri, 21 Jan 2022 07:20:01 +0000 X-UUID: a58c552daf164f0b91006c7fbfaa0b73-20220121 X-UUID: a58c552daf164f0b91006c7fbfaa0b73-20220121 Received: from mtkcas68.mediatek.inc [(172.29.94.19)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1990731876; Fri, 21 Jan 2022 00:19:50 -0700 Received: from mtkexhb02.mediatek.inc (172.21.101.103) by MTKMBS62N1.mediatek.inc (172.29.193.41) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 20 Jan 2022 23:19:49 -0800 Received: from mtkcas10.mediatek.inc (172.21.101.39) by mtkexhb02.mediatek.inc (172.21.101.103) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 21 Jan 2022 15:19:47 +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; Fri, 21 Jan 2022 15:19:46 +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 , , , , , , Subject: [PATCH v5 2/3] mmc: core: Add support for SDIO async interrupt Date: Fri, 21 Jan 2022 15:19:41 +0800 Message-ID: <20220121071942.11601-3-axe.yang@mediatek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220121071942.11601-1-axe.yang@mediatek.com> References: <20220121071942.11601-1-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-20220120_232000_289520_6EF81E8F X-CRM114-Status: GOOD ( 18.25 ) X-BeenThere: linux-arm-kernel@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-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org If cap-sdio-async-irq flag is set in host dts node, parse EAI information from SDIO CCCR interrupt externsion segment. If async interrupt is supported by SDIO card then send command to card to enable it and set enable_async_irq flag in sdio_cccr structure to 1. The parse flow is implemented in sdio_read_cccr(). Acked-by: AngeloGioacchino Del Regno Signed-off-by: Axe Yang --- drivers/mmc/core/host.c | 2 ++ drivers/mmc/core/sdio.c | 17 +++++++++++++++++ include/linux/mmc/card.h | 3 ++- include/linux/mmc/host.h | 1 + include/linux/mmc/sdio.h | 5 +++++ 5 files changed, 27 insertions(+), 1 deletion(-) diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c index cf140f4ec864..a972241548b4 100644 --- a/drivers/mmc/core/host.c +++ b/drivers/mmc/core/host.c @@ -410,6 +410,8 @@ int mmc_of_parse(struct mmc_host *host) if (device_property_read_bool(dev, "no-mmc-hs400")) host->caps2 &= ~(MMC_CAP2_HS400_1_8V | MMC_CAP2_HS400_1_2V | MMC_CAP2_HS400_ES); + if (device_property_read_bool(dev, "cap-sdio-async-irq")) + host->caps2 |= MMC_CAP2_SDIO_ASYNC_IRQ; /* Must be after "non-removable" check */ if (device_property_read_u32(dev, "fixed-emmc-driver-type", &drv_type) == 0) { diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c index 41164748723d..771fb5d18585 100644 --- a/drivers/mmc/core/sdio.c +++ b/drivers/mmc/core/sdio.c @@ -225,6 +225,23 @@ static int sdio_read_cccr(struct mmc_card *card, u32 ocr) card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_C; if (data & SDIO_DRIVE_SDTD) card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_D; + + if (card->host->caps2 & MMC_CAP2_SDIO_ASYNC_IRQ) { + ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_INTERRUPT_EXT, 0, + &data); + if (ret) + goto out; + + if (data & SDIO_INTERRUPT_EXT_SAI) { + data |= SDIO_INTERRUPT_EXT_EAI; + ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_INTERRUPT_EXT, + data, NULL); + if (ret) + goto out; + + card->cccr.enable_async_irq = 1; + } + } } /* if no uhs mode ensure we check for high speed */ diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h index 37f975875102..4df9182bc0e6 100644 --- a/include/linux/mmc/card.h +++ b/include/linux/mmc/card.h @@ -219,7 +219,8 @@ struct sdio_cccr { wide_bus:1, high_power:1, high_speed:1, - disable_cd:1; + disable_cd:1, + enable_async_irq:1; }; struct sdio_cis { diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index 7afb57cab00b..502a5418264c 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -402,6 +402,7 @@ struct mmc_host { #define MMC_CAP2_CRYPTO 0 #endif #define MMC_CAP2_ALT_GPT_TEGRA (1 << 28) /* Host with eMMC that has GPT entry at a non-standard location */ +#define MMC_CAP2_SDIO_ASYNC_IRQ (1 << 29) /* SDIO host supports asynchronous interrupt */ int fixed_drv_type; /* fixed driver type for non-removable media */ diff --git a/include/linux/mmc/sdio.h b/include/linux/mmc/sdio.h index 2a05d1ac4f0e..1ef400f28642 100644 --- a/include/linux/mmc/sdio.h +++ b/include/linux/mmc/sdio.h @@ -159,6 +159,11 @@ #define SDIO_DTSx_SET_TYPE_A (1 << SDIO_DRIVE_DTSx_SHIFT) #define SDIO_DTSx_SET_TYPE_C (2 << SDIO_DRIVE_DTSx_SHIFT) #define SDIO_DTSx_SET_TYPE_D (3 << SDIO_DRIVE_DTSx_SHIFT) + +#define SDIO_CCCR_INTERRUPT_EXT 0x16 +#define SDIO_INTERRUPT_EXT_SAI (1 << 0) +#define SDIO_INTERRUPT_EXT_EAI (1 << 1) + /* * Function Basic Registers (FBR) */