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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1C452C433F5 for ; Mon, 27 Dec 2021 08:36:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235723AbhL0Igx (ORCPT ); Mon, 27 Dec 2021 03:36:53 -0500 Received: from mailgw02.mediatek.com ([210.61.82.184]:54852 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S232454AbhL0Igu (ORCPT ); Mon, 27 Dec 2021 03:36:50 -0500 X-UUID: c5f7a8868fdb4c13b5fe73b59aa1b1c5-20211227 X-UUID: c5f7a8868fdb4c13b5fe73b59aa1b1c5-20211227 Received: from mtkexhb01.mediatek.inc [(172.21.101.102)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1689304448; Mon, 27 Dec 2021 16:36:48 +0800 Received: from mtkcas10.mediatek.inc (172.21.101.39) by mtkmbs10n2.mediatek.inc (172.21.101.183) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.792.3; Mon, 27 Dec 2021 16:36:47 +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; Mon, 27 Dec 2021 16:36:46 +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 v1 2/3] mmc: core: Add support for SDIO async interrupt Date: Mon, 27 Dec 2021 16:36:40 +0800 Message-ID: <20211227083641.12538-3-axe.yang@mediatek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211227083641.12538-1-axe.yang@mediatek.com> References: <20211227083641.12538-1-axe.yang@mediatek.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If cap-sdio-async-int 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_int flag in sdio_cccr structure to 1. The parse flow is implemented in sdio_read_cccr(). 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 d4683b1d263f..7ad60fab099a 100644 --- a/drivers/mmc/core/host.c +++ b/drivers/mmc/core/host.c @@ -401,6 +401,8 @@ 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-int")) + host->caps2 |= MMC_CAP2_SDIO_ASYNC_INT; /* 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 68edf7a615be..335e4ada733a 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_INT) { + 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_int = 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..b0deb8ca8eeb 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_int:1; }; struct sdio_cis { diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index 0c0c9a0fdf57..60c8ebe1a5e8 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -399,6 +399,7 @@ 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_INT (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) */ -- 2.25.1