From patchwork Tue Dec 13 09:00:40 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Victor Shih X-Patchwork-Id: 633830 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 72AA7C4332F for ; Tue, 13 Dec 2022 09:03:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235047AbiLMJDT (ORCPT ); Tue, 13 Dec 2022 04:03:19 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36128 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235012AbiLMJCH (ORCPT ); Tue, 13 Dec 2022 04:02:07 -0500 Received: from mail-pj1-x102e.google.com (mail-pj1-x102e.google.com [IPv6:2607:f8b0:4864:20::102e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C902DF02E; Tue, 13 Dec 2022 01:02:03 -0800 (PST) Received: by mail-pj1-x102e.google.com with SMTP id w4-20020a17090ac98400b002186f5d7a4cso2905496pjt.0; Tue, 13 Dec 2022 01:02:03 -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=JbLCNFK4yUEg4Jb2vovMrI4jYY1qH30LfoBhRWLCbl0=; b=fnkii9b6+rvOHo65mYRv+TUP2xVkjHg3Ql2Vq67yU7MLmBQSW6jMngG3ndKpHJDySv Bq49davB5VVZxzUomzrFSF4UCB3EfCkLhtMptUX4kkQ0qIowNR1h/lcl11pXjNwdbyWa 3HJ+jeNulBwQDoZVwSJ3x3rBLyV8x16rsw3a1nO04qO20pfHvw7H3y1L6Vc4t7SrdRjj Qi6T5R0Sfvth/dMbX82Z8lXXyxSj61M5o0TZv5Yrn//l+p7ckx/H9qvMmtU9yORQyOhs D9e8Gr3SyoW6IkMv7e3wRL28LtAdeGC+Za5cFwC+MPvvmCTL5EJsGDdhXzOn3MtjG58u BJCA== 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=JbLCNFK4yUEg4Jb2vovMrI4jYY1qH30LfoBhRWLCbl0=; b=qIf/ggchARo4mq52oofsAu9C2Gc0cQw0g53aLeFQQRiwzEi7jamcDZF2AZHbTz6AUm ZgsR1t12dCwrqXLfIidHXqPjOjgzxKeLqEVrTx6UungT7MvoU6KlQSL7XWgfEdnI8Adf cVSIwmDgIAh7xYT0Oeklwswg7eEqjIo5tvvzgS6JU/STJ1kqa7r/Pkzjt7bK+aEd05c+ 1+HNVilj3Ho3qZZ3uE0jNEHNxjpzPt2GZQHk6QgaVrjzurbc47P4nfea8hMPukG9uC7V +YmocddzXSHgyGKVCkU+w+yVf8cM2FcMcdInkED8WWKDddtzvircNhTEMldsTny+B3Oc TVJA== X-Gm-Message-State: ANoB5pkx0UU+LAMgFFHqgrBmfLII81qTfW6ENTxN/ZtvvSLsura3rRaL v01zv3PXFQH1+U/lRhcIjUs= X-Google-Smtp-Source: AA0mqf7+lJh2W4s0zwmY2pk4D8umsH7+/P/wgfDsAZpUoeYtTIGDX8t1mCtErmtDuw00cgyBw/GHJw== X-Received: by 2002:a05:6a20:6d8a:b0:ad:a0c2:53ee with SMTP id gl10-20020a056a206d8a00b000ada0c253eemr7147746pzb.12.1670922123411; Tue, 13 Dec 2022 01:02:03 -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.125.2022.12.13.01.02.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 13 Dec 2022 01:02:02 -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 17/24] mmc: sdhci-uhs2: add uhs2_control() to initialise the interface Date: Tue, 13 Dec 2022 17:00:40 +0800 Message-Id: <20221213090047.3805-18-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 Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org This is a sdhci version of mmc's uhs2_set_reg operation. UHS-II interface (related registers) will be initialised here. Signed-off-by: Ben Chuang Signed-off-by: AKASHI Takahiro Signed-off-by: Victor Shih --- drivers/mmc/host/sdhci-uhs2.c | 92 +++++++++++++++++++++++++++++++++++ drivers/mmc/host/sdhci.c | 11 +++++ 2 files changed, 103 insertions(+) diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c index c7e411fa0a6e..de15a6559702 100644 --- a/drivers/mmc/host/sdhci-uhs2.c +++ b/drivers/mmc/host/sdhci-uhs2.c @@ -276,6 +276,48 @@ 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 + 0); + 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->flags & MMC_UHS2_SPEED_B) + 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) +{ + u32 val; + /* 100ms */ + int timeout = 100000; + + if (read_poll_timeout_atomic(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 * @@ -361,6 +403,55 @@ 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); + int err = 0; + u16 sdhci_uhs2_set_ptr = sdhci_readw(host, SDHCI_UHS2_SETTINGS_PTR); + u16 sdhci_uhs2_phy_set_reg = (sdhci_uhs2_set_ptr + 4); + + 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_SET_SPEED_B: + sdhci_writeb(host, SDHCI_UHS2_PHY_SET_SPEED_B, sdhci_uhs2_phy_set_reg); + 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_POST_ATTACH_SD: + host->ops->uhs2_post_attach_sd(host); + 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 * @@ -489,6 +580,7 @@ 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_set_ios = sdhci_uhs2_set_ios; + host->mmc_host_ops.uhs2_control = sdhci_uhs2_control; return 0; } diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 49bbdc155b2b..3656e66fcca7 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -234,6 +234,17 @@ void sdhci_reset(struct sdhci_host *host, u8 mask) } EXPORT_SYMBOL_GPL(sdhci_reset); +void sdhci_clear_set_irqs(struct sdhci_host *host, u32 clear, u32 set) +{ + u32 ier; + + ier = sdhci_readl(host, SDHCI_INT_ENABLE); + ier &= ~clear; + ier |= set; + sdhci_writel(host, ier, SDHCI_INT_ENABLE); + sdhci_writel(host, ier, SDHCI_SIGNAL_ENABLE); +} + static bool sdhci_do_reset(struct sdhci_host *host, u8 mask) { if (host->quirks & SDHCI_QUIRK_NO_CARD_NO_RESET) {