From mboxrd@z Thu Jan 1 00:00:00 1970 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 B2EC4EB64DC for ; Mon, 10 Jul 2023 16:02:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233218AbjGJQCC (ORCPT ); Mon, 10 Jul 2023 12:02:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57162 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233735AbjGJQB6 (ORCPT ); Mon, 10 Jul 2023 12:01:58 -0400 Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C537A1AA; Mon, 10 Jul 2023 09:01:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1689004908; x=1720540908; h=message-id:date:mime-version:from:subject:to:cc: references:in-reply-to:content-transfer-encoding; bh=OfmvTlOQtPcCYQ7bsLnrzoUFFm3uHjLmmkaXcpLdxMg=; b=KRCoJ1IHrqheFrGyO3+VU1rqN+inADctKZTk2yLbZCHm9BtS9snAsnuQ JoBN/TP/zr5/ifvBHHv0xCWMIMCJFLj+vkR7twtYTgTwjqdJkiRMtf8YP LjXWkBsm/P6do3UMibT7RJEwUyL2W8ZZiaA36eR7qQs/SSzAVLlSgGcSm aTwu3sr4+aN2TRHT6zItBDkwDdQN8SwOnuKab7e6SD0nSo9C9VvF3lHuH 6Mi1Ym69GgTIJ2Ay7Ir675abqv00eJm7svrF0y0WIQT2184xYMSM2dBwl uWjNHixXoAPmpSFXB68RxK+ipgN2RiJ8bw7MRZe11lStjCvcJAdlOccAV Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10767"; a="364421110" X-IronPort-AV: E=Sophos;i="6.01,194,1684825200"; d="scan'208";a="364421110" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Jul 2023 09:01:48 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10767"; a="834320123" X-IronPort-AV: E=Sophos;i="6.01,194,1684825200"; d="scan'208";a="834320123" Received: from ahunter6-mobl1.ger.corp.intel.com (HELO [10.0.2.15]) ([10.251.220.97]) by fmsmga002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Jul 2023 09:01:43 -0700 Message-ID: <22c0134f-205e-e14d-f0ed-480cd779beff@intel.com> Date: Mon, 10 Jul 2023 19:01:40 +0300 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Firefox/102.0 Thunderbird/102.13.0 From: Adrian Hunter Subject: Re: [PATCH V8 11/23] mmc: sdhci-uhs2: add set_power() to support vdd2 To: Victor Shih , ulf.hansson@linaro.org 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, Ben Chuang , Victor Shih References: <20230621100151.6329-1-victorshihgli@gmail.com> <20230621100151.6329-12-victorshihgli@gmail.com> Content-Language: en-US Organization: Intel Finland Oy, Registered Address: PL 281, 00181 Helsinki, Business Identity Code: 0357606 - 4, Domiciled in Helsinki In-Reply-To: <20230621100151.6329-12-victorshihgli@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 21/06/23 13:01, Victor Shih wrote: > From: Victor Shih > > This is a UHS-II version of sdhci's set_power operation. > VDD2, as well as VDD, is handled here. > > 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. > > Signed-off-by: Ben Chuang > Signed-off-by: AKASHI Takahiro > Signed-off-by: Victor Shih > --- > drivers/mmc/host/sdhci-uhs2.c | 48 +++++++++++++++++++++++++++ > drivers/mmc/host/sdhci.c | 61 +++++++++++++++++++---------------- > drivers/mmc/host/sdhci.h | 1 + > 3 files changed, 82 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..ef344d4edf8f 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 reange is supported by hardware. reange -> range > + */ > + 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);