From patchwork Fri Sep 6 10:20:39 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Victor Shih X-Patchwork-Id: 826165 Received: from mail-pf1-f177.google.com (mail-pf1-f177.google.com [209.85.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 831491CB14C; Fri, 6 Sep 2024 10:21:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.177 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725618112; cv=none; b=YybFrFGhCm3sN6cKLkpN9kk+T5Rr70X9VAP1YA4fqozQD5A7u9EjqhWzJA7JzhPJaHf27LdUuCqJqgvIIZYrV497MxI5Ueu6I2rXAUyUf7GvqMD/1Wu9qwYfjTDgNkGJyFhC+LU68KvvTOGfaj0v0R7xI45lBFR6GnPAIurGdBA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725618112; c=relaxed/simple; bh=ZXGEzaz3HiWknyeUmK9tPtLjvRCZ9IuLbN+IF8lFSPs=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=dgnhd7hKv3f8l5gpNK9XQUbNz1QUYKcjPtys8m2PkTNXEjsJ5zdhEofVduAynGsx8pJmA9n+x36mAYP1ApA3+pE9enGAGvurSpgx9lTsntqvjM7+r+VF1lVkDI9fBV0iE404ZTUQK2WhyU+z4nIQxwZlOA6WEqya30h4NnfuZi4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=THnKbiKl; arc=none smtp.client-ip=209.85.210.177 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="THnKbiKl" Received: by mail-pf1-f177.google.com with SMTP id d2e1a72fcca58-715abede256so1507053b3a.3; Fri, 06 Sep 2024 03:21:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1725618110; x=1726222910; darn=vger.kernel.org; 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=frHRewf0pkcu1synjclcnqgZV+fZOIZRmQD7b9toY3A=; b=THnKbiKlHELjoNN9grOzKRLN0RT2MUmdGqYLVX94ZSiBGH5+GMDnnwzCTwEaVZ/q2c 7zAAsZQt+m8KTpYgwhVFXQUdygS7ntIUyy+mekcoa63ft5gke54qrK6SWG/MII63DIQU ZD/57axYBoQ6oj4K+7NcH1zE7JTzpvKEcDJVqBEiNAzGrae3Z9b5NM02FnOWKK8G5YxS tBWKfUlOsIaArzXkAWel/rWzfzT3xQVMx4c5A9tfcAKg6aOCobyxpe/6BAiU1BXnSIur MOAEc0zDVVmiXNaW76hMNl+sSFnJsVnfijiFK6n+BR9FaYwxYxEqHZIe2/cTpIh3+Rrc rUUw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1725618110; x=1726222910; 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=frHRewf0pkcu1synjclcnqgZV+fZOIZRmQD7b9toY3A=; b=kCAnhKHAzSDdcZ7Oal/mwpkkL015Btj6vpodTfY6JLmOzCKTmTJ7zL2jK0E6sokJEG k2TJIOO4GSxDt/54qaEHIJ54dJ/RgYaIezLDGZWeui1q3dDa8XJSaS5WhCMKkj8UJAuA 1uC3vSRX7OwV5Qf/4Rt9jEjcY5gprEEA22HfViOc1JEWnoK9OEjGMx8h1Mq2BCxCloAQ IEuKAryKca1JNoex7XW3AlSnkw9zAPkxcW3IPiTs24HHqztAfCq4Bug3tjmJPlEkwqzi 7V8Ldn3B4/7yen/mKe/0gcK4/CEvjapD1UW0E1RDyfLWxOic1zOcOGkF3ZhWL8j+O76G SrFw== X-Forwarded-Encrypted: i=1; AJvYcCVCZ3aM6VWt1U+3mOTaf2Qqfm1GDMa9BPrE0DnIUuJh/ZQKwCICty+LM0JQl7UIkeOotpkBLvjOr+ikAbA=@vger.kernel.org X-Gm-Message-State: AOJu0YwpkHxaN5aF4IpLs2dmaAQHQsChVlxSZZLdBrvSmYS6UCCOL6v9 HWr/J3EkOTzFXfRWze9lMA6OVu+qMo0PVpnJ2W+PMi7mIz/34vOG X-Google-Smtp-Source: AGHT+IFgD82mb2Na55nHfZMjE6PHwtw4gb12A7NYy+mvy8+Ype+Ay8khHQgatFXnMCeiVRVqU1eG7Q== X-Received: by 2002:a05:6a21:9185:b0:1c4:9e5f:c645 with SMTP id adf61e73a8af0-1cf1d1cd822mr1948058637.40.1725618109643; Fri, 06 Sep 2024 03:21:49 -0700 (PDT) Received: from localhost.localdomain ([2402:7500:569:244d:5f74:48c1:9f66:fb02]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-717931fca8csm2072611b3a.139.2024.09.06.03.21.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 06 Sep 2024 03:21:49 -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, Lucas.Lai@genesyslogic.com.tw, HL.Liu@genesyslogic.com.tw, Greg.tu@genesyslogic.com.tw, dlunev@chromium.org, Victor Shih , Ben Chuang , AKASHI Takahiro , Victor Shih Subject: [PATCH V21 12/22] mmc: sdhci-uhs2: add set_power() to support vdd2 Date: Fri, 6 Sep 2024 18:20:39 +0800 Message-Id: <20240906102049.7059-13-victorshihgli@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240906102049.7059-1-victorshihgli@gmail.com> References: <20240906102049.7059-1-victorshihgli@gmail.com> Precedence: bulk X-Mailing-List: linux-mmc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Victor Shih This is a UHS-II version of sdhci's set_power operation. Use sdhci_uhs2_set_power() to set VDD2 for support UHS2 interface. VDD2, as well as VDD, is handled here. Signed-off-by: Ben Chuang Signed-off-by: AKASHI Takahiro Signed-off-by: Victor Shih --- Updates in V17: - Export sdhci_uhs2_set_power() function. Updates in V13: - Drop use vmmc2. - Modify comment message. 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 | 49 ++++++++++++++++++++++++++++ drivers/mmc/host/sdhci-uhs2.h | 1 + drivers/mmc/host/sdhci.c | 61 +++++++++++++++++++---------------- drivers/mmc/host/sdhci.h | 1 + 4 files changed, 84 insertions(+), 28 deletions(-) diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c index 3d16f1ef9344..0cfe9a3f91f7 100644 --- a/drivers/mmc/host/sdhci-uhs2.c +++ b/drivers/mmc/host/sdhci-uhs2.c @@ -59,6 +59,13 @@ 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); +} + /** * sdhci_uhs2_reset - invoke SW reset * @host: SDHCI host @@ -86,6 +93,48 @@ 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 = 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_regulator_set_vqmmc2(mmc, &mmc->ios); + } else { + mmc_opt_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd); + /* support 1.8v only for now */ + mmc_regulator_set_vqmmc2(mmc, &mmc->ios); + + /* 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); + } +} +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 caaf9fba4975..3efa8dd690bf 100644 --- a/drivers/mmc/host/sdhci-uhs2.h +++ b/drivers/mmc/host/sdhci-uhs2.h @@ -178,5 +178,6 @@ 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 5a5fe3528bb4..366c3d30dba6 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 66ab90bd4017..0f78708d0c70 100644 --- a/drivers/mmc/host/sdhci.h +++ b/drivers/mmc/host/sdhci.h @@ -836,6 +836,7 @@ 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);