From patchwork Fri Nov 6 02:27:12 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: AKASHI Takahiro X-Patchwork-Id: 319625 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 93542C5517A for ; Fri, 6 Nov 2020 02:28:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3EF8F20782 for ; Fri, 6 Nov 2020 02:28:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="xpbe0Z+y" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726140AbgKFC2i (ORCPT ); Thu, 5 Nov 2020 21:28:38 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44188 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726139AbgKFC2h (ORCPT ); Thu, 5 Nov 2020 21:28:37 -0500 Received: from mail-pg1-x544.google.com (mail-pg1-x544.google.com [IPv6:2607:f8b0:4864:20::544]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 83C7DC0613D2 for ; Thu, 5 Nov 2020 18:28:37 -0800 (PST) Received: by mail-pg1-x544.google.com with SMTP id i26so2777911pgl.5 for ; Thu, 05 Nov 2020 18:28:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=mqCDZIuiLx/n0ZjiCWMKLiWgSP4v0Mlt6iCFtf8Ftx8=; b=xpbe0Z+yJOegh+0Z9s2hMBH32g+CaBUd4UVcoseFFGM4bsplxgz+t+tdpgIq0p31E0 ik/IRT7qJAfGx7c+ltNvW8zZsS3ukCfGANnho4CRHq6Amx4bTFh5rXf9XXrPMpWPHdbv 2yNUCIW8Hp9GhbAS4NJDsptIEPMf7vjeipZnzvvL+ZQm7FJwQAowoO7yl+HIduD4ml/N uiQ09CM1ejwArMGQvZjRPLNilrzSZXZ1J+dPqibeRCm+6eAtah6uoNaCunehCdzEaaeC RHOB2ZXN/jAOTQLBI0NNzCCP18mR79pLJY7rVbDqeN4rmVRNpiz299jzJ4dPLovoxH4S RmGA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=mqCDZIuiLx/n0ZjiCWMKLiWgSP4v0Mlt6iCFtf8Ftx8=; b=scd1oDW2WB27md2YEmFxPwUatimfon6uMA09Zs6lwgOwLfrJYertsAw29FG0PpdDTK WMobFbVJV0TxMbUg76A/R0oJp5WeIU+3PL8SkPWnFOeVIj6WaYG0CciYyA5OF0niBiy/ sdAj+xxSIe1kNDZ6k/75HtWfHBnYUtZ8yjztwqTp38/LVfVKmquCNzrXUhuiCxzq0SHa mOpXlzFLk6IKmEUY4qOptd31EYwPykkRQ7Ey0Puh/fKS8B6F8IGlvlDZrU5FrB76ANC7 zIuBHUTT/nyTMuMo8VhxPi4V450cUsiLzrnrEMh8eQ3G6T0O6HT9WofO3Nhbf5XS7MDM FdeQ== X-Gm-Message-State: AOAM5326SndLzgipQOgFB4Nwfr2VkJ5oi2ylEQYWVVglzMtNSl3GNf4A sZsjOgXE3y+pUr5iihwSCV2jtg== X-Google-Smtp-Source: ABdhPJx/JcfvJbKSuWO8If8NP5D1mKspwAORHeexIYr2/Nj29jof9jAbpfF+9lqKcRTCMeHNe6XyBA== X-Received: by 2002:a17:90b:310e:: with SMTP id gc14mr5561740pjb.147.1604629717048; Thu, 05 Nov 2020 18:28:37 -0800 (PST) Received: from localhost.localdomain (p784a66b9.tkyea130.ap.so-net.ne.jp. [120.74.102.185]) by smtp.gmail.com with ESMTPSA id m13sm3703040pjr.30.2020.11.05.18.28.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 05 Nov 2020 18:28:36 -0800 (PST) From: AKASHI Takahiro To: ulf.hansson@linaro.org, adrian.hunter@intel.com Cc: linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, ben.chuang@genesyslogic.com.tw, greg.tu@genesyslogic.com.tw, AKASHI Takahiro Subject: [RFC PATCH v3.1 13/27] mmc: sdhci-uhs2: add set_power() to support vdd2 Date: Fri, 6 Nov 2020 11:27:12 +0900 Message-Id: <20201106022726.19831-14-takahiro.akashi@linaro.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201106022726.19831-1-takahiro.akashi@linaro.org> References: <20201106022726.19831-1-takahiro.akashi@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org 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 --- drivers/mmc/host/sdhci-uhs2.c | 80 +++++++++++++++++++++++++++++++++++ drivers/mmc/host/sdhci-uhs2.h | 2 + drivers/mmc/host/sdhci.c | 58 +++++++++++++++---------- drivers/mmc/host/sdhci.h | 2 + 4 files changed, 119 insertions(+), 23 deletions(-) diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c index e2b9743fe17d..2bf78cc4e9ed 100644 --- a/drivers/mmc/host/sdhci-uhs2.c +++ b/drivers/mmc/host/sdhci-uhs2.c @@ -98,6 +98,86 @@ void sdhci_uhs2_reset(struct sdhci_host *host, u16 mask) } EXPORT_SYMBOL_GPL(sdhci_uhs2_reset); +void sdhci_uhs2_set_power(struct sdhci_host *host, unsigned char mode, + unsigned short vdd) +{ + struct mmc_host *mmc = host->mmc; + u8 pwr; + + /* FIXME: check if flags & MMC_UHS2_SUPPORT? */ + if (!(host->mmc->caps & MMC_CAP_UHS2)) { + sdhci_set_power(host, mode, vdd); + return; + } + + 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); + + if (!IS_ERR(host->mmc->supply.vmmc)) + mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); + if (!IS_ERR_OR_NULL(host->mmc->supply.vmmc2)) + mmc_regulator_set_ocr(mmc, mmc->supply.vmmc2, 0); + + if (host->quirks2 & SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON) + sdhci_runtime_pm_bus_off(host); + } else { + if (!IS_ERR(host->mmc->supply.vmmc)) + mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd); + if (!IS_ERR_OR_NULL(host->mmc->supply.vmmc2)) + /* support 1.8v only for now */ + mmc_regulator_set_ocr(mmc, mmc->supply.vmmc2, + fls(MMC_VDD2_165_195) - 1); + + /* + * Spec says that we should clear the power reg before setting + * a new value. Some controllers don't seem to like this though. + */ + if (!(host->quirks & SDHCI_QUIRK_SINGLE_POWER_WRITE)) + sdhci_writeb(host, 0, SDHCI_POWER_CONTROL); + + /* + * At least the Marvell CaFe chip gets confused if we set the + * voltage and set turn on power at the same time, so set the + * voltage first. + */ + if (host->quirks & SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER) + sdhci_writeb(host, pwr, 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); + + if (host->quirks2 & SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON) + sdhci_runtime_pm_bus_on(host); + + /* + * Some controllers need an extra 10ms delay of 10ms before + * they can apply clock after applying power + */ + if (host->quirks & SDHCI_QUIRK_DELAY_AFTER_POWER) + mdelay(10); + } +} +EXPORT_SYMBOL_GPL(sdhci_uhs2_set_power); + /*****************************************************************************\ * * * Driver init/exit * diff --git a/drivers/mmc/host/sdhci-uhs2.h b/drivers/mmc/host/sdhci-uhs2.h index 7bb7a0d67109..3c19d8e44c36 100644 --- a/drivers/mmc/host/sdhci-uhs2.h +++ b/drivers/mmc/host/sdhci-uhs2.h @@ -211,5 +211,7 @@ struct sdhci_host; void sdhci_uhs2_dump_regs(struct sdhci_host *host); void sdhci_uhs2_reset(struct sdhci_host *host, u16 mask); +void sdhci_uhs2_set_power(struct sdhci_host *host, unsigned char mode, + unsigned short vdd); #endif /* __SDHCI_UHS2_H */ diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index af336bdb4305..0b741eb546cb 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -187,13 +187,14 @@ static void sdhci_disable_card_detection(struct sdhci_host *host) sdhci_set_card_detection(host, false); } -static void sdhci_runtime_pm_bus_on(struct sdhci_host *host) +void sdhci_runtime_pm_bus_on(struct sdhci_host *host) { if (host->bus_on) return; host->bus_on = true; pm_runtime_get_noresume(host->mmc->parent); } +EXPORT_SYMBOL_GPL(sdhci_runtime_pm_bus_on); void sdhci_runtime_pm_bus_off(struct sdhci_host *host) { @@ -2017,36 +2018,47 @@ 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) +{ + u8 pwr; + + 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: + pwr = SDHCI_POWER_330; + break; + default: + pwr = 0; + } + + return pwr; +} +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: - 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; - } } if (host->pwr == pwr) diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h index b9932423db08..2b5b8295cf92 100644 --- a/drivers/mmc/host/sdhci.h +++ b/drivers/mmc/host/sdhci.h @@ -831,6 +831,7 @@ static inline void sdhci_read_caps(struct sdhci_host *host) __sdhci_read_caps(host, NULL, NULL, NULL); } +void sdhci_runtime_pm_bus_on(struct sdhci_host *host); void sdhci_runtime_pm_bus_off(struct sdhci_host *host); u16 sdhci_calc_clk(struct sdhci_host *host, unsigned int clock, unsigned int *actual_clock); @@ -841,6 +842,7 @@ 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); void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq);