From patchwork Tue Dec 13 09:00:38 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Victor Shih X-Patchwork-Id: 32706 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a05:7300:8188:b0:89:790f:f786 with SMTP id m8csp3857965dye; Tue, 13 Dec 2022 01:04:27 -0800 (PST) X-Google-Smtp-Source: AA0mqf7yooEXY3l9LuBnivsiYz4AEuLFLW5W3s7COnro0RAc2/AGtfnWBZjw0gyZXNBsm0e5iNeU X-Received: by 2002:a17:902:ebc1:b0:189:65e7:e16b with SMTP id p1-20020a170902ebc100b0018965e7e16bmr19160802plg.66.1670922266865; Tue, 13 Dec 2022 01:04:26 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1670922266; cv=none; d=google.com; s=arc-20160816; b=GpSrLUcs6nRFY+gRLVdnOyjPOQ7w63cJfhMuBZmtcS0CrumyerQ5pXlxUHOIVqXJDV cOAInBhGiINt4ru64VbUE+UCI1IXq50VTbJUPtcVvO3nhgDWFtzka0xjV5E66nYcN2sx +NIaV3s/iIAC/Qg1+VkLPtb/W2sapgqNd31hXtsVu3CkLnTYX+d49hbxJZGZ2bJL5GXT 95GzEtDeEPhVqR6R+HlOr5rEngl6QzbCNQjvDpr254C1gZRj4SsPeRM7hPNiMeBKX9mf Ru7jSlbzhrcLlaalozhPYPghoQ6GmqNJ52ktjudgrh4bZA3eiPgGlHImiXXxiuu9YeAB 25kg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=TFVqXNDoIn/bAHZecPcyJ9V854tw+X6Ejrgn0ob5b4g=; b=IGjjGOY9vUdv47ctZdizE18srh777BIaqHx/iir2ko5zBGLxCpQOpPy/ByOTJov9ZB 8l5ZuXOlBQCiC/wXtfViwX/7Tj7pm9Wjht3vTMJVE3iuhqyw66gaentQZajdDSvK8h+m dWe07y2a1EmBY7yJMUiXAhvqfbqu/yYHaj8GfctB+mQ74+NPVIT0kpX4TGdCPIYhlZJW UD7VwybmO2ciiaf/aCsaOt8tUgJdaCz7itBqXnG2H9CmJ7GWuiYhEMZR6WPxo0q+4PIM rTjznDraly3XXgPxgKQIw+2Ys7IhEHlubOJKwybOuGgTbZX+4l6MEQ8LCijfwO6DAsxe 9Zew== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20210112 header.b=bSZVwpBA; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id h19-20020a170902eed300b0017840d9d42esi11339519plb.582.2022.12.13.01.04.14; Tue, 13 Dec 2022 01:04:26 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20210112 header.b=bSZVwpBA; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235025AbiLMJDY (ORCPT + 99 others); Tue, 13 Dec 2022 04:03:24 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36630 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235004AbiLMJCG (ORCPT ); Tue, 13 Dec 2022 04:02:06 -0500 Received: from mail-pf1-x436.google.com (mail-pf1-x436.google.com [IPv6:2607:f8b0:4864:20::436]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 53A9C1006C; Tue, 13 Dec 2022 01:01:57 -0800 (PST) Received: by mail-pf1-x436.google.com with SMTP id 21so1740782pfw.4; Tue, 13 Dec 2022 01:01:57 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=TFVqXNDoIn/bAHZecPcyJ9V854tw+X6Ejrgn0ob5b4g=; b=bSZVwpBACj2KAGup5nm1UdtpOSAMEw5Bd4cX76mHf3ONMH51BPlpwwUy7RlDyF5qvI Knn+kCYgxg6J2IlwBYg2MwXeooBkA5NvD1/TxjBDYsgU2AWyx1NzhsLrHNh4qcsKHiv8 646DMyw0nXQOzPX3miBk6TTRgn/x4wlsVUPXeWz2J5UgzQ8Tt5/kxUg9fjacn8TQD3I2 kklPrGYlI+9jMFZyW0F+WAgNcGKmnh+HRtUa927ngf/0gna3FNh3mjf5jgH9G1wYO35y 1ZsSiOBEMsk3E+Qh8k8+1kWtb/MlS8zPJHNcdol6nzlp8jyN/soMuFlfP+psVxNE0AeM t6/A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=TFVqXNDoIn/bAHZecPcyJ9V854tw+X6Ejrgn0ob5b4g=; b=QngcMn63/ke/n8qTbjmD/345rcxVBxHT7qwzBFW7oafL7he2Mqlokjh+egs+AcLbYE rH7NrjY3f6te143xTHoQUTT9Gp0Y6icfdO1IodcHiIW/TCxkjtSd8ARoRRQQ6U+ejhk+ ch3t5Ro2qB+UvVjoJrx2fP1X8U9QI6HHQDLkDb2zUBYZkmdPxIv3+GtbZKywqDYOC+bu CKYddkAYylTFvDAM9QESn8G+U4MoBfQouBdGKgx+NMgy3uCiZHPgYTjnsR3dc8+wLmgO ABCCkvMbAjhtakNJd9TMIYMgJUBKzb8E1TdWpQrPvC3AjZ9v/UYaSMSHgULYqKhYi/pM t2cw== X-Gm-Message-State: ANoB5pmq7fnx0RVVYPo5T9dheXhjEhgt6cItllwDoADnMo4dpPYyGsmY dlDe3BFUrOdMnYz2iRVWizU= X-Received: by 2002:a62:19c6:0:b0:576:cd93:2b06 with SMTP id 189-20020a6219c6000000b00576cd932b06mr20591067pfz.6.1670922116688; Tue, 13 Dec 2022 01:01:56 -0800 (PST) Received: from localhost.localdomain (2001-b400-e2dc-5c03-264b-f684-a8c9-21ae.emome-ip6.hinet.net. [2001:b400:e2dc:5c03:264b:f684:a8c9:21ae]) by smtp.gmail.com with ESMTPSA id 81-20020a621954000000b0056b9ec7e2desm7141682pfz.125.2022.12.13.01.01.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 13 Dec 2022 01:01:56 -0800 (PST) From: Victor Shih X-Google-Original-From: Victor Shih To: ulf.hansson@linaro.org, adrian.hunter@intel.com Cc: linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, benchuanggli@gmail.com, HL.Liu@genesyslogic.com.tw, Greg.tu@genesyslogic.com.tw, takahiro.akashi@linaro.org, dlunev@chromium.org, Victor Shih , Ben Chuang Subject: [PATCH V6 15/24] mmc: sdhci-uhs2: add detect_init() to detect the interface Date: Tue, 13 Dec 2022 17:00:38 +0800 Message-Id: <20221213090047.3805-16-victor.shih@genesyslogic.com.tw> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221213090047.3805-1-victor.shih@genesyslogic.com.tw> References: <20221213090047.3805-1-victor.shih@genesyslogic.com.tw> MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM, RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1752088986653700329?= X-GMAIL-MSGID: =?utf-8?q?1752088986653700329?= Sdhci_uhs2_do_detect_init() is a sdhci version of mmc's uhs2_detect_init operation. After detected, the host's UHS-II capabilities will be set up here and interrupts will also be enabled. Signed-off-by: Ben Chuang Signed-off-by: AKASHI Takahiro Signed-off-by: Victor Shih --- drivers/mmc/host/sdhci-uhs2.c | 117 ++++++++++++++++++++++++++++++++++ 1 file changed, 117 insertions(+) diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c index 3d52d35a91a5..52587025d5e3 100644 --- a/drivers/mmc/host/sdhci-uhs2.c +++ b/drivers/mmc/host/sdhci-uhs2.c @@ -335,6 +335,123 @@ int sdhci_uhs2_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) * * \*****************************************************************************/ +static int sdhci_uhs2_interface_detect(struct sdhci_host *host) +{ + /* 100ms */ + int timeout = 100000; + u32 val; + + udelay(200); /* wait for 200us before check */ + + if (read_poll_timeout_atomic(sdhci_readl, val, (val & SDHCI_UHS2_IF_DETECT), + 100, timeout, true, host, SDHCI_PRESENT_STATE)) { + pr_warn("%s: not detect UHS2 interface in 200us.\n", mmc_hostname(host->mmc)); + sdhci_dumpregs(host); + return -EIO; + } + + /* Enable UHS2 error interrupts */ + sdhci_uhs2_clear_set_irqs(host, SDHCI_INT_ALL_MASK, SDHCI_UHS2_INT_ERROR_MASK); + + /* 150ms */ + timeout = 150000; + if (read_poll_timeout_atomic(sdhci_readl, val, (val & SDHCI_UHS2_LANE_SYNC), + 100, timeout, true, host, SDHCI_PRESENT_STATE)) { + pr_warn("%s: UHS2 Lane sync fail in 150ms.\n", mmc_hostname(host->mmc)); + sdhci_dumpregs(host); + return -EIO; + } + + DBG("%s: UHS2 Lane synchronized in UHS2 mode, PHY is initialized.\n", + mmc_hostname(host->mmc)); + return 0; +} + +static int sdhci_uhs2_init(struct sdhci_host *host) +{ + u16 caps_ptr = 0; + u32 caps_gen = 0; + u32 caps_phy = 0; + u32 caps_tran[2] = {0, 0}; + struct mmc_host *mmc = host->mmc; + + caps_ptr = sdhci_readw(host, SDHCI_UHS2_CAPS_PTR); + if (caps_ptr < 0x100 || caps_ptr > 0x1FF) { + pr_err("%s: SDHCI_UHS2_CAPS_PTR(%d) is wrong.\n", + mmc_hostname(mmc), caps_ptr); + return -ENODEV; + } + caps_gen = sdhci_readl(host, caps_ptr + SDHCI_UHS2_CAPS_OFFSET); + caps_phy = sdhci_readl(host, caps_ptr + SDHCI_UHS2_CAPS_PHY_OFFSET); + caps_tran[0] = sdhci_readl(host, caps_ptr + SDHCI_UHS2_CAPS_TRAN_OFFSET); + caps_tran[1] = sdhci_readl(host, caps_ptr + SDHCI_UHS2_CAPS_TRAN_1_OFFSET); + + /* General Caps */ + mmc->uhs2_caps.dap = caps_gen & SDHCI_UHS2_CAPS_DAP_MASK; + mmc->uhs2_caps.gap = FIELD_GET(SDHCI_UHS2_CAPS_GAP_MASK, caps_gen); + mmc->uhs2_caps.n_lanes = FIELD_GET(SDHCI_UHS2_CAPS_LANE_MASK, caps_gen); + mmc->uhs2_caps.addr64 = (caps_gen & SDHCI_UHS2_CAPS_ADDR_64) ? 1 : 0; + mmc->uhs2_caps.card_type = FIELD_GET(SDHCI_UHS2_CAPS_DEV_TYPE_MASK, caps_gen); + + /* PHY Caps */ + mmc->uhs2_caps.phy_rev = caps_phy & SDHCI_UHS2_CAPS_PHY_REV_MASK; + mmc->uhs2_caps.speed_range = FIELD_GET(SDHCI_UHS2_CAPS_PHY_RANGE_MASK, caps_phy); + mmc->uhs2_caps.n_lss_sync = FIELD_GET(SDHCI_UHS2_CAPS_PHY_N_LSS_SYN_MASK, caps_phy); + mmc->uhs2_caps.n_lss_dir = FIELD_GET(SDHCI_UHS2_CAPS_PHY_N_LSS_DIR_MASK, caps_phy); + if (mmc->uhs2_caps.n_lss_sync == 0) + mmc->uhs2_caps.n_lss_sync = 16 << 2; + else + mmc->uhs2_caps.n_lss_sync <<= 2; + if (mmc->uhs2_caps.n_lss_dir == 0) + mmc->uhs2_caps.n_lss_dir = 16 << 3; + else + mmc->uhs2_caps.n_lss_dir <<= 3; + + /* LINK/TRAN Caps */ + mmc->uhs2_caps.link_rev = caps_tran[0] & SDHCI_UHS2_CAPS_TRAN_LINK_REV_MASK; + mmc->uhs2_caps.n_fcu = FIELD_GET(SDHCI_UHS2_CAPS_TRAN_N_FCU_MASK, caps_tran[0]); + if (mmc->uhs2_caps.n_fcu == 0) + mmc->uhs2_caps.n_fcu = 256; + mmc->uhs2_caps.host_type = FIELD_GET(SDHCI_UHS2_CAPS_TRAN_HOST_TYPE_MASK, caps_tran[0]); + mmc->uhs2_caps.maxblk_len = FIELD_GET(SDHCI_UHS2_CAPS_TRAN_BLK_LEN_MASK, caps_tran[0]); + mmc->uhs2_caps.n_data_gap = caps_tran[1] & SDHCI_UHS2_CAPS_TRAN_1_N_DATA_GAP_MASK; + + return 0; +} + +static int sdhci_uhs2_do_detect_init(struct mmc_host *mmc) +{ + struct sdhci_host *host = mmc_priv(mmc); + int ret = -EIO; + + DBG("Begin do uhs2 detect init.\n"); + + if (sdhci_uhs2_interface_detect(host)) { + pr_warn("%s: cannot detect UHS2 interface.\n", + mmc_hostname(host->mmc)); + goto out; + } + + if (sdhci_uhs2_init(host)) { + pr_warn("%s: UHS2 init fail.\n", mmc_hostname(host->mmc)); + goto out; + } + + /* Init complete, do soft reset and enable UHS2 error irqs. */ + host->ops->uhs2_reset(host, SDHCI_UHS2_SW_RESET_SD); + sdhci_uhs2_clear_set_irqs(host, SDHCI_INT_ALL_MASK, SDHCI_UHS2_INT_ERROR_MASK); + /* + * N.B SDHCI_INT_ENABLE and SDHCI_SIGNAL_ENABLE was cleared + * by SDHCI_UHS2_SW_RESET_SD + */ + sdhci_writel(host, host->ier, SDHCI_INT_ENABLE); + sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE); + + ret = 0; +out: + return ret; +} + static int sdhci_uhs2_host_ops_init(struct sdhci_host *host) { host->mmc_host_ops.start_signal_voltage_switch =