From patchwork Fri Sep 15 09:43:43 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Victor Shih X-Patchwork-Id: 140428 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a05:612c:172:b0:3f2:4152:657d with SMTP id h50csp1039699vqi; Fri, 15 Sep 2023 06:18:27 -0700 (PDT) X-Google-Smtp-Source: AGHT+IE4ie2W5tzpBuKb6Xbd951Amwf5rvAE6TeTKhLP+FXdi//gL+1FCLHzlFfPt0MFSfK3KHK5 X-Received: by 2002:a17:902:d484:b0:1c0:d7a8:a43e with SMTP id c4-20020a170902d48400b001c0d7a8a43emr1956565plg.53.1694783907522; Fri, 15 Sep 2023 06:18:27 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1694783907; cv=none; d=google.com; s=arc-20160816; b=p96NSZoL2sRpStEHJmVeozpBqoxqz64EV4A+mj13dyA6vgK2M5V7R4Hu2A4HdBfwct b9Pw8AJSTpGUaCWCPdPZCKSZpQkuz0dQiQaquNQJsgl3gVhWXeGVJwvGd6Vo9PCZg+nN xagx7RVVr1cr5pSlgMH2CeQZbMdj01WaB4d3vePJx7QNmfrZHT+Yzhp5WnX6SKwm6DXT nkoBSNLj8TBie5xNlrIHtbRCRFXmBQNG9WgRYC/uOIsSGBIsuQ92eC60WDRG4coW90gc zWZeB3FGiDm6g3PbhtBrEy2HNb/wWUK9GThHPi0X5u0rSeKhWUC3Q1oZyUv19pdvx6wj k38A== 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=pGB6aEfT29O/np/vugEtzabJh26wlJ/7P9M9FZXoZFU=; fh=y5fk6vguAkbcel7KoRWpitGO8B8BpGYTQpzSdaI/dY4=; b=abDR54GSYQR7+5GU5Kh11zd2V/Wm0ppTuI4R5QboHVheQmsdQcHF1Dzy9N2w/KAs22 BpdrLT0IlBFMUZdVI7iXmG5WVAbytTEdkt9VqHJdOhE7mNyuUi3nJOp1XreBLHyBnNHj c9yxAYiX5BxKuXg7LCuK07juEePIoSjqC4DhrwsfhAeIUuFl/MvR/4DcITwcNG6PZgpX D+u9+Z5eUqPv+3jEbPzr3qpcxF0l29rxFUiFz/wp6PL7MXsbhhSfT50s/sWt/7Phm52K gQHQNhHvQJI7NCb7lNEarHDMz0DvdKzeyrSVKecEcdrrQesa78E3X+hxDPRyVzIJ1UAp RH7g== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@gmail.com header.s=20230601 header.b=RNscULHi; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.36 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 pete.vger.email (pete.vger.email. [23.128.96.36]) by mx.google.com with ESMTPS id u9-20020a1709026e0900b001c426636990si1656128plk.637.2023.09.15.06.18.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 15 Sep 2023 06:18:27 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.36 as permitted sender) client-ip=23.128.96.36; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20230601 header.b=RNscULHi; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.36 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 (depot.vger.email [IPv6:2620:137:e000::3:0]) by pete.vger.email (Postfix) with ESMTP id 47DC281A73D8; Fri, 15 Sep 2023 02:46:25 -0700 (PDT) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.10 at pete.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233853AbjIOJpo (ORCPT + 32 others); Fri, 15 Sep 2023 05:45:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33580 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233854AbjIOJpf (ORCPT ); Fri, 15 Sep 2023 05:45:35 -0400 Received: from mail-pl1-x630.google.com (mail-pl1-x630.google.com [IPv6:2607:f8b0:4864:20::630]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 493902736; Fri, 15 Sep 2023 02:44:40 -0700 (PDT) Received: by mail-pl1-x630.google.com with SMTP id d9443c01a7336-1c43b4b02c1so1886825ad.3; Fri, 15 Sep 2023 02:44:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1694771080; x=1695375880; darn=vger.kernel.org; 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=pGB6aEfT29O/np/vugEtzabJh26wlJ/7P9M9FZXoZFU=; b=RNscULHizZ69n1LOgLZir7L30204nSHeU4l4xto4Waf5slszg+V5I2Us+zxNHZ5PP6 +lClhI4URHi1xMPb5cg2PXIwGlAd8hwZn9Nebe7ZrJbuSLLIsYeRfwZNpTRITTXtTP3u z9XoGGF6AB0n+K/Cx69AZdNyzIE2nctHtkUNBJTPDYrf4tTy89nwUPG41Xj3mNeqObpB j3iB3KosilpRckK3ZW+UQei4EqbgEvHgCG1v7DWAViPUaHOiMlze7AxcxZNQt2QvwN3l U+XrbdUrOnMi6zPk9DIBibVn1nkJSINvLlcNh2HdQi5xqL887LaDC9xb6aOMVj8cLxVG PAdA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1694771080; x=1695375880; 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=pGB6aEfT29O/np/vugEtzabJh26wlJ/7P9M9FZXoZFU=; b=RpMqX8TnssN3LEi5Bl6c8ZqanDxVLcW9yKlFqb23YnF4Krg6MbZ0XuwpolkUDwMnBv GwlPvmT2NPqyGDATpHUQrHJsc948IKuM4zT98aCSYfsR3WsgfvA2a/SgQgyid4uOdEYX f7ezlwabqP7hflrG0qXiTFWCT4XPVfJEQrNoXnSeyhbk21DZAmvCQmDnd1mEebos+0eW +t7bIhYr0Y9m65/JMkgm45RfsPVTg9ReiwRKo4epcTxwND0KTs782/sldGFgKS0zRdtM xlGRWW7azS4IT90uIWBjTwF4qqaxVO+AhcmKXKrcuUPpVYrzFxddnzOpZrBE0dxyJzWU fx1A== X-Gm-Message-State: AOJu0Yw4kbPRwwP7MYjmMNaFqhGSRU8rDUe/yhon+UNi9mx0/fBpM7o2 inV+FlFVABaePVvCpK8kCps= X-Received: by 2002:a17:90a:bf90:b0:26d:2b86:dbe1 with SMTP id d16-20020a17090abf9000b0026d2b86dbe1mr905210pjs.25.1694771079688; Fri, 15 Sep 2023 02:44:39 -0700 (PDT) Received: from localhost.localdomain (2001-b400-e2a6-6d77-d32f-f490-6688-3d32.emome-ip6.hinet.net. [2001:b400:e2a6:6d77:d32f:f490:6688:3d32]) by smtp.gmail.com with ESMTPSA id x4-20020a17090a530400b0025023726fc4sm4432794pjh.26.2023.09.15.02.44.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 15 Sep 2023 02:44:39 -0700 (PDT) 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 , Victor Shih Subject: [PATCH V12 15/23] mmc: sdhci-uhs2: add detect_init() to detect the interface Date: Fri, 15 Sep 2023 17:43:43 +0800 Message-Id: <20230915094351.11120-16-victorshihgli@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230915094351.11120-1-victorshihgli@gmail.com> References: <20230915094351.11120-1-victorshihgli@gmail.com> MIME-Version: 1.0 X-Spam-Status: No, score=-0.6 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on pete.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (pete.vger.email [0.0.0.0]); Fri, 15 Sep 2023 02:46:25 -0700 (PDT) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1777109730620166167 X-GMAIL-MSGID: 1777109730620166167 From: Victor Shih 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 Acked-by: Adrian Hunter --- Updates in V8: - usleep_range() to instead of udelay() in sdhci_uhs2_interface_detect(). - read_poll_timeout() to instead of read_poll_timeout_atomic() in sdhci_uhs2_interface_detect(). - Modify return value in sdhci_uhs2_do_detect_init(). Updates in V7: - Drop using uhs2_reset ops and use sdhci_uhs2_reset() in sdhci_uhs2_do_detect_init(). Updates in V6: - Remove unnecessary functions. - Wrap at 100 columns in some functions. --- drivers/mmc/host/sdhci-uhs2.c | 112 ++++++++++++++++++++++++++++++++++ 1 file changed, 112 insertions(+) diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c index ad791c48f681..4c2a56629ab3 100644 --- a/drivers/mmc/host/sdhci-uhs2.c +++ b/drivers/mmc/host/sdhci-uhs2.c @@ -335,6 +335,118 @@ static int sdhci_uhs2_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) * * \*****************************************************************************/ +static int sdhci_uhs2_interface_detect(struct sdhci_host *host) +{ + int timeout = 100000; /* 100ms */ + u32 val; + + usleep_range(50, 200); /* wait for 50us - 200us before check */ + + if (read_poll_timeout(sdhci_readl, val, (val & SDHCI_UHS2_IF_DETECT), + 100, timeout, true, host, SDHCI_PRESENT_STATE)) { + pr_warn("%s: not detect UHS2 interface in 100ms.\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(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); + + 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)); + return -EIO; + } + + if (sdhci_uhs2_init(host)) { + pr_warn("%s: UHS2 init fail.\n", mmc_hostname(host->mmc)); + return -EIO; + } + + /* Init complete, do soft reset and enable UHS2 error irqs. */ + sdhci_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); + + return 0; +} + static int sdhci_uhs2_host_ops_init(struct sdhci_host *host) { host->mmc_host_ops.start_signal_voltage_switch =