From patchwork Fri Aug 18 10:02:05 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Victor Shih X-Patchwork-Id: 13357694 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 6F3FCC05052 for ; Fri, 18 Aug 2023 10:05:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1359615AbjHRKEz (ORCPT ); Fri, 18 Aug 2023 06:04:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53986 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1359672AbjHRKE1 (ORCPT ); Fri, 18 Aug 2023 06:04:27 -0400 Received: from mail-pf1-x42e.google.com (mail-pf1-x42e.google.com [IPv6:2607:f8b0:4864:20::42e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 09E5A3AB9; Fri, 18 Aug 2023 03:04:05 -0700 (PDT) Received: by mail-pf1-x42e.google.com with SMTP id d2e1a72fcca58-6889350bc2bso699132b3a.0; Fri, 18 Aug 2023 03:04:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1692352982; x=1692957782; 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=OmvRcwSX9mivOMd2F6LZuvrkylgkIQLRzYwEdUvvsrE=; b=gejVDWt0+IRvMB0se7Yiop/p3f5/2EkYud97pvY098/YXkBJQu6IPUprbAHrkdeuNn kO7fqdX81O4qVakf6kaArNgv/OyoXSssUgp9dWjbQ6+Er/ldw4YFBf8ppmUD6fzDVgh3 aWicw4JaASn7Yz4ej0matjTV2bBCGrTZ+NIo2FZ8kbffpSz2YqrnBl6Vj849kuQW/wjj 0tqyuVy+WOX7qfNbXMgr4mUaC+vUlX9qqT+LKmAc4t2QPE0/r+PrXuvAegTBCP44yCmj p5VftvECec/D5cC9W3TEOL9GJuKKOGBPuy6KXLb6oNADDFvXeZOIwdQqJQLBKrV6WayF 0TWg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1692352982; x=1692957782; 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=OmvRcwSX9mivOMd2F6LZuvrkylgkIQLRzYwEdUvvsrE=; b=LWf/kDs9mNama8P+uPieloB9AcZ1SNTifBTOPbL9peULz21iq1vnhvC/fEoraXdNYv vHnjYAdV/lBzMuJz8b6G/+SORFDOrJmPnRyiAplK5tZbrglnhYwxZly5afm9/eeGuFwq 8QRHWTOUXt224LJIP+5D3JmimqfI+I6x9dKP8xyl3TFxbTqvCleF0q7mQUr8UraNJGys PgjJ9VTZ0OaPxAMnB2D3LSaOzlveNrj/e7FOmrHfglZyOtg7uStSLgQbudjYAvWSUXsX feoEih5gjiJbcRgAOiSAFpTjt9cgkAB5BYf/reLEpRcdUSJWgnlvJ5irtdL865IoXQm6 ULew== X-Gm-Message-State: AOJu0Yz1lMUkVWt/3jth65qZwGaDTvkkO2yOfXSfFKNq6ZZOGuwqvjlU NRPodv1Zi3j/o5mDwly6kUli2WW83SY= X-Google-Smtp-Source: AGHT+IF1PWRBKsdI3Rf8fiSct4jX4lKzsiIhYoD4Uq8qg2g7wuW1dHzfDoNxvF86SeDtsVfdsH+Rew== X-Received: by 2002:a05:6a20:a123:b0:135:4527:efe4 with SMTP id q35-20020a056a20a12300b001354527efe4mr2997135pzk.10.1692352981814; Fri, 18 Aug 2023 03:03:01 -0700 (PDT) Received: from localhost.localdomain (2001-b400-e25c-55ec-ad14-f925-5202-a39b.emome-ip6.hinet.net. [2001:b400:e25c:55ec:ad14:f925:5202:a39b]) by smtp.gmail.com with ESMTPSA id n22-20020a62e516000000b006870ccfbb54sm1180649pff.196.2023.08.18.03.02.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 18 Aug 2023 03:03:01 -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 V10 11/23] mmc: sdhci-uhs2: add set_power() to support vdd2 Date: Fri, 18 Aug 2023 18:02:05 +0800 Message-Id: <20230818100217.12725-12-victorshihgli@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230818100217.12725-1-victorshihgli@gmail.com> References: <20230818100217.12725-1-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 UHS-II version of sdhci's set_power operation. VDD2, as well as VDD, is handled here. Signed-off-by: Ben Chuang Signed-off-by: AKASHI Takahiro Signed-off-by: Victor Shih Acked-by: Adrian Hunter --- Updates in V10: - Move some definitions of PatchV9[05/23] to PatchV10[11/23]. Updates in V9: - Modify annotations in sdhci_get_vdd_value(). Updates in V8: - Adjust the position of matching brackets. - Add the initial value of the pwr in sdhci_uhs2_set_power(). Updates in V7: - Add clear the power reg before setting a new value in sdhci_uhs2_set_power(). - Add MMC_VDD_34_35 case and MMC_VDD_35_36 case in sdhci_get_vdd_value(). - Drop pwr variable in sdhci_get_vdd_value(). Updates in V6: - Add mmc_opt_regulator_set_ocr(). - Remove unnecessary functions. --- drivers/mmc/host/sdhci-uhs2.c | 48 +++++++++++++++++++++++++++ drivers/mmc/host/sdhci.c | 61 +++++++++++++++++++---------------- drivers/mmc/host/sdhci.h | 1 + include/linux/mmc/host.h | 1 + 4 files changed, 83 insertions(+), 28 deletions(-) diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c index dfc80a7f1bad..fc37a34629c2 100644 --- a/drivers/mmc/host/sdhci-uhs2.c +++ b/drivers/mmc/host/sdhci-uhs2.c @@ -57,6 +57,13 @@ EXPORT_SYMBOL_GPL(sdhci_uhs2_dump_regs); * * \*****************************************************************************/ +static inline int mmc_opt_regulator_set_ocr(struct mmc_host *mmc, + struct regulator *supply, + unsigned short vdd_bit) +{ + return IS_ERR_OR_NULL(supply) ? 0 : mmc_regulator_set_ocr(mmc, supply, vdd_bit); +} + bool sdhci_uhs2_mode(struct sdhci_host *host) { return host->mmc->flags & MMC_UHS2_SUPPORT; @@ -94,6 +101,47 @@ void sdhci_uhs2_reset(struct sdhci_host *host, u16 mask) } EXPORT_SYMBOL_GPL(sdhci_uhs2_reset); +static void sdhci_uhs2_set_power(struct sdhci_host *host, unsigned char mode, unsigned short vdd) +{ + struct mmc_host *mmc = host->mmc; + u8 pwr = 0; + + if (mode != MMC_POWER_OFF) { + pwr = sdhci_get_vdd_value(vdd); + if (!pwr) + WARN(1, "%s: Invalid vdd %#x\n", + mmc_hostname(host->mmc), vdd); + pwr |= SDHCI_VDD2_POWER_180; + } + + if (host->pwr == pwr) + return; + host->pwr = pwr; + + if (pwr == 0) { + sdhci_writeb(host, 0, SDHCI_POWER_CONTROL); + + mmc_opt_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); + mmc_opt_regulator_set_ocr(mmc, mmc->supply.vmmc2, 0); + } else { + mmc_opt_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd); + /* support 1.8v only for now */ + mmc_opt_regulator_set_ocr(mmc, mmc->supply.vmmc2, fls(MMC_VDD_165_195) - 1); + + /* Clear the power reg before setting a new value */ + sdhci_writeb(host, 0, SDHCI_POWER_CONTROL); + + /* vdd first */ + pwr |= SDHCI_POWER_ON; + sdhci_writeb(host, pwr & 0xf, SDHCI_POWER_CONTROL); + mdelay(5); + + pwr |= SDHCI_VDD2_POWER_ON; + sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL); + mdelay(5); + } +} + /*****************************************************************************\ * * * Driver init/exit * diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 753b251179f2..eca54a16e7fc 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -23,7 +23,7 @@ #include #include #include - +#include #include #include @@ -2061,41 +2061,46 @@ static void sdhci_set_power_reg(struct sdhci_host *host, unsigned char mode, sdhci_writeb(host, 0, SDHCI_POWER_CONTROL); } +unsigned short sdhci_get_vdd_value(unsigned short vdd) +{ + switch (1 << vdd) { + case MMC_VDD_165_195: + /* + * Without a regulator, SDHCI does not support 2.0v + * so we only get here if the driver deliberately + * added the 2.0v range to ocr_avail. Map it to 1.8v + * for the purpose of turning on the power. + */ + case MMC_VDD_20_21: + return SDHCI_POWER_180; + case MMC_VDD_29_30: + case MMC_VDD_30_31: + return SDHCI_POWER_300; + case MMC_VDD_32_33: + case MMC_VDD_33_34: + /* + * 3.4V ~ 3.6V are valid only for those platforms where it's + * known that the voltage range is supported by hardware. + */ + case MMC_VDD_34_35: + case MMC_VDD_35_36: + return SDHCI_POWER_330; + default: + return 0; + } +} +EXPORT_SYMBOL_GPL(sdhci_get_vdd_value); + void sdhci_set_power_noreg(struct sdhci_host *host, unsigned char mode, unsigned short vdd) { u8 pwr = 0; if (mode != MMC_POWER_OFF) { - switch (1 << vdd) { - case MMC_VDD_165_195: - /* - * Without a regulator, SDHCI does not support 2.0v - * so we only get here if the driver deliberately - * added the 2.0v range to ocr_avail. Map it to 1.8v - * for the purpose of turning on the power. - */ - case MMC_VDD_20_21: - pwr = SDHCI_POWER_180; - break; - case MMC_VDD_29_30: - case MMC_VDD_30_31: - pwr = SDHCI_POWER_300; - break; - case MMC_VDD_32_33: - case MMC_VDD_33_34: - /* - * 3.4 ~ 3.6V are valid only for those platforms where it's - * known that the voltage range is supported by hardware. - */ - case MMC_VDD_34_35: - case MMC_VDD_35_36: - pwr = SDHCI_POWER_330; - break; - default: + pwr = sdhci_get_vdd_value(vdd); + if (!pwr) { WARN(1, "%s: Invalid vdd %#x\n", mmc_hostname(host->mmc), vdd); - break; } } diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h index 43ad3f4b7672..f3bd558b337f 100644 --- a/drivers/mmc/host/sdhci.h +++ b/drivers/mmc/host/sdhci.h @@ -837,6 +837,7 @@ void sdhci_set_power(struct sdhci_host *host, unsigned char mode, void sdhci_set_power_and_bus_voltage(struct sdhci_host *host, unsigned char mode, unsigned short vdd); +unsigned short sdhci_get_vdd_value(unsigned short vdd); void sdhci_set_power_noreg(struct sdhci_host *host, unsigned char mode, unsigned short vdd); int sdhci_get_cd_nogpio(struct mmc_host *mmc); diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index e38c45392079..1eba64228725 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -357,6 +357,7 @@ struct mmc_pwrseq; struct mmc_supply { struct regulator *vmmc; /* Card power supply */ + struct regulator *vmmc2; /* UHS2 VDD2 power supply */ struct regulator *vqmmc; /* Optional Vccq supply */ struct regulator *vqmmc2; /* Optional supply for phy */ };