From patchwork Wed Jun 21 10:01:45 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Victor Shih X-Patchwork-Id: 694832 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 1C5C8EB64DC for ; Wed, 21 Jun 2023 10:05:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231142AbjFUKFK (ORCPT ); Wed, 21 Jun 2023 06:05:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53142 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232282AbjFUKDH (ORCPT ); Wed, 21 Jun 2023 06:03:07 -0400 Received: from mail-pf1-x429.google.com (mail-pf1-x429.google.com [IPv6:2607:f8b0:4864:20::429]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6BFD919B1; Wed, 21 Jun 2023 03:02:50 -0700 (PDT) Received: by mail-pf1-x429.google.com with SMTP id d2e1a72fcca58-66615629689so4851920b3a.2; Wed, 21 Jun 2023 03:02:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1687341770; x=1689933770; 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=yQ/ejGwzr5fQf434gvF9Mt8T6F7YSHiktYA/rGcBM5Y=; b=Oga8BFfHzqYTHGgFb2CKLV4q70pTYMBm+MLq0BosJBMeRQMb2u6OXTs1zM41J33lFj a9xvdqoQ6uX6tU0IYW4zwccpD9xr9slMGUSSO/NB69HrHCO/uj9Xnx9ECPxZTqgdxP7C wmEIWbX1nAP2bCOy66dICLgdsP6AxTFoaQmYip0mmXJy9+YKW3h/LIt4H1tEuZb05VDx GscSONVpgLK1BXFQWslK/h8xcBDUGpbM0tGVvCgguUDNkEtb9QJMxmteAL/L+QCvDCAp EqQ/cENGPQrRB2cpWzNCdXlAlOB0+sI5enZ4NOFr0Z4t844NVKtdVLij5ldmybjhnFKz mBfA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1687341770; x=1689933770; 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=yQ/ejGwzr5fQf434gvF9Mt8T6F7YSHiktYA/rGcBM5Y=; b=lCVlWd2HEYJXtWG3m4RsOns51Q480etGhT/wo4Q4cc61pnQZshCE/3bOPnCJoq0CbE +tnqsFsJ5CPbBF5NMXhl9SFLSvUftnAiiqJLfRErZRNMQSZQJr+e7H4t7g9Gc0W5WmeB 2+x4+x65nrt2mxTeBJC5rvTfgiY2wmRTu1exxpr/Yfr1rY0rQghPF+hLzi0TCtAyaxZ6 xZ44cks6q2gd3qSDsOhe+kPoyEvDlzcJ+WvHpVhxc5Yds54E0i/Cac2ksbxpkDh23r1y iXkJnz3i6lfeCw4pqPRc+/wZGSyU/R0JZUTdo8i1/U70e+TMVWLaihJs4G9menNzhikW aIxw== X-Gm-Message-State: AC+VfDzEv8omXCQxTtcvUs08TrmB4U65QyAzy6DJy30AkSvyFPHa4Phl R6Yv0dwrUbPSiXAhHM3rpTc= X-Google-Smtp-Source: ACHHUZ6I81g9fBA10D0mqoVTIm5479ovHzdWnB9TJJQ0Tg6iFpcB+Dp3tBMSKfe2177JEoJhFNiGLg== X-Received: by 2002:a05:6a00:1504:b0:668:7325:e184 with SMTP id q4-20020a056a00150400b006687325e184mr11861640pfu.16.1687341769772; Wed, 21 Jun 2023 03:02:49 -0700 (PDT) Received: from localhost.localdomain (2001-b400-e254-4eda-2716-05ea-20f5-b048.emome-ip6.hinet.net. [2001:b400:e254:4eda:2716:5ea:20f5:b048]) by smtp.gmail.com with ESMTPSA id g2-20020aa78742000000b0064f46570bb7sm2611196pfo.167.2023.06.21.03.02.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 Jun 2023 03:02:49 -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 V8 17/23] mmc: sdhci-uhs2: add uhs2_control() to initialise the interface Date: Wed, 21 Jun 2023 18:01:45 +0800 Message-Id: <20230621100151.6329-18-victorshihgli@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230621100151.6329-1-victorshihgli@gmail.com> References: <20230621100151.6329-1-victorshihgli@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org From: Victor Shih This is a sdhci version of mmc's uhs2_set_reg operation. UHS-II interface (related registers) will be initialised here. Updates in V8: - Reorder the definitions and lose the parentheses in sdhci_uhs2_set_config(). - read_poll_timeout() to instead of read_poll_timeout_atomic() in sdhci_uhs2_check_dormant(). Updates in V7: - Remove unnecessary function. Updates in V6: - Remove unnecessary function. - Remove unnecessary parameter when call the DBG(). - Cancel export state of some functions. Signed-off-by: Ben Chuang Signed-off-by: AKASHI Takahiro Signed-off-by: Victor Shih --- drivers/mmc/host/sdhci-uhs2.c | 88 +++++++++++++++++++++++++++++++++++ 1 file changed, 88 insertions(+) diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c index af1b0c5e48fd..09b86fec9f7b 100644 --- a/drivers/mmc/host/sdhci-uhs2.c +++ b/drivers/mmc/host/sdhci-uhs2.c @@ -278,6 +278,48 @@ static void __sdhci_uhs2_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) sdhci_set_clock(host, host->clock); } +static void sdhci_uhs2_set_config(struct sdhci_host *host) +{ + u32 value; + u16 sdhci_uhs2_set_ptr = sdhci_readw(host, SDHCI_UHS2_SETTINGS_PTR); + u16 sdhci_uhs2_gen_set_reg = sdhci_uhs2_set_ptr; + u16 sdhci_uhs2_phy_set_reg = sdhci_uhs2_set_ptr + 4; + u16 sdhci_uhs2_tran_set_reg = sdhci_uhs2_set_ptr + 8; + u16 sdhci_uhs2_tran_set_1_reg = sdhci_uhs2_set_ptr + 12; + + /* Set Gen Settings */ + value = FIELD_PREP(SDHCI_UHS2_GEN_SETTINGS_N_LANES_MASK, host->mmc->uhs2_caps.n_lanes_set); + sdhci_writel(host, value, sdhci_uhs2_gen_set_reg); + + /* Set PHY Settings */ + value = FIELD_PREP(SDHCI_UHS2_PHY_N_LSS_DIR_MASK, host->mmc->uhs2_caps.n_lss_dir_set) | + FIELD_PREP(SDHCI_UHS2_PHY_N_LSS_SYN_MASK, host->mmc->uhs2_caps.n_lss_sync_set); + if (host->mmc->ios.timing == MMC_TIMING_UHS2_SPEED_B || + host->mmc->ios.timing == MMC_TIMING_UHS2_SPEED_B_HD) + value |= SDHCI_UHS2_PHY_SET_SPEED_B; + sdhci_writel(host, value, sdhci_uhs2_phy_set_reg); + + /* Set LINK-TRAN Settings */ + value = FIELD_PREP(SDHCI_UHS2_TRAN_RETRY_CNT_MASK, host->mmc->uhs2_caps.max_retry_set) | + FIELD_PREP(SDHCI_UHS2_TRAN_N_FCU_MASK, host->mmc->uhs2_caps.n_fcu_set); + sdhci_writel(host, value, sdhci_uhs2_tran_set_reg); + sdhci_writel(host, host->mmc->uhs2_caps.n_data_gap_set, sdhci_uhs2_tran_set_1_reg); +} + +static int sdhci_uhs2_check_dormant(struct sdhci_host *host) +{ + int timeout = 100000; /* 100ms */ + u32 val; + + if (read_poll_timeout(sdhci_readl, val, (val & SDHCI_UHS2_IN_DORMANT_STATE), + 100, timeout, true, host, SDHCI_PRESENT_STATE)) { + pr_warn("%s: UHS2 IN_DORMANT fail in 100ms.\n", mmc_hostname(host->mmc)); + sdhci_dumpregs(host); + return -EIO; + } + return 0; +} + /*****************************************************************************\ * * * MMC callbacks * @@ -359,6 +401,51 @@ static int sdhci_uhs2_enable_clk(struct mmc_host *mmc) return 0; } +static int sdhci_uhs2_do_detect_init(struct mmc_host *mmc); + +static int sdhci_uhs2_control(struct mmc_host *mmc, enum sd_uhs2_operation op) +{ + struct sdhci_host *host = mmc_priv(mmc); + struct mmc_ios *ios = &mmc->ios; + int err = 0; + + DBG("Begin uhs2 control, act %d.\n", op); + + switch (op) { + case UHS2_PHY_INIT: + err = sdhci_uhs2_do_detect_init(mmc); + break; + case UHS2_SET_CONFIG: + sdhci_uhs2_set_config(host); + break; + case UHS2_ENABLE_INT: + sdhci_uhs2_clear_set_irqs(host, 0, SDHCI_INT_CARD_INT); + break; + case UHS2_DISABLE_INT: + sdhci_uhs2_clear_set_irqs(host, SDHCI_INT_CARD_INT, 0); + break; + case UHS2_CHECK_DORMANT: + err = sdhci_uhs2_check_dormant(host); + break; + case UHS2_DISABLE_CLK: + err = sdhci_uhs2_disable_clk(mmc); + break; + case UHS2_ENABLE_CLK: + err = sdhci_uhs2_enable_clk(mmc); + break; + case UHS2_SET_IOS: + err = sdhci_uhs2_set_ios(mmc, ios); + break; + default: + pr_err("%s: input sd uhs2 operation %d is wrong!\n", + mmc_hostname(host->mmc), op); + err = -EIO; + break; + } + + return err; +} + /*****************************************************************************\ * * * Driver init/exit * @@ -481,6 +568,7 @@ static int sdhci_uhs2_host_ops_init(struct sdhci_host *host) { host->mmc_host_ops.start_signal_voltage_switch = sdhci_uhs2_start_signal_voltage_switch; + host->mmc_host_ops.uhs2_control = sdhci_uhs2_control; return 0; }