From patchwork Wed Jun 21 10:01:48 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Victor Shih X-Patchwork-Id: 13287066 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 E3A84C0015E for ; Wed, 21 Jun 2023 10:05:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232169AbjFUKFR (ORCPT ); Wed, 21 Jun 2023 06:05:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53082 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229832AbjFUKDI (ORCPT ); Wed, 21 Jun 2023 06:03:08 -0400 Received: from mail-pf1-x435.google.com (mail-pf1-x435.google.com [IPv6:2607:f8b0:4864:20::435]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2F3AB19BE; Wed, 21 Jun 2023 03:02:59 -0700 (PDT) Received: by mail-pf1-x435.google.com with SMTP id d2e1a72fcca58-666ecf9a081so4192639b3a.2; Wed, 21 Jun 2023 03:02:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1687341778; x=1689933778; 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=yaY1ZiTIhvmzDWlBNhgIqxr3952lVFKhm/rXtKJ/wXc=; b=AsNHEdnG6Y7TUv0FXTRLiw/3BFL1ZC+PDpfwPOncinM1HE2awMohRLxKhk5yv3f4xX ri1FdnfRKnWzk7rnm9FAvLzJhUPv49kqtygtPU61erN1bpwO6Jxk6O2R53N7sCIkFQNj 6Ac9gLrao2FOtVUE85nWOe9Y2QIYcXbuB9ZYR3ra+efg2KxdC26XfBvvTQXWdVkzOzxw Ch/lgJwRmNf6ADevRyrcAZ2Iytf3NjA0TCDueGGlLtq2lh8Rn8UAuNE/zGMYulLEBYpD jhEfNz4T9k5aVbHAMI0u9lMs/M7l+3IsEYvD6DnHTbk/5x0MkakCQMDfIMBmZlzlA5fx r+5Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1687341778; x=1689933778; 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=yaY1ZiTIhvmzDWlBNhgIqxr3952lVFKhm/rXtKJ/wXc=; b=QX9cIH5L681v11FgHpgsPkCES+JCktV4Q24rrRwUQM9m9RyvOsEel2aa2ZXkfbbBmB pl1jYsD9bTRoZ0UBfX90GgJdl3nUjBT6zKDIYiKq22aFw2p5qlLFXXBOgGMo0tj+zpWB 2oYgQ1XvYsa+Yhaxb/vjng0S5BL5QtcU8xPxPTD51d2gM4P6H4+AJ0GaakalHhz5Ob0Y mCsXp0jWugrZvDEOPoK0GTrc5EXZMJNjVQ2y+hlJzmnUh+BxX4unkkAUSe9gWviaqKCS oF5iZpBbBUoaOapDHC7gBgwUJXffrK74H+ZrgYiqe4aY0/fqtfWSbLXwHbXnOy2WilcR R1qA== X-Gm-Message-State: AC+VfDxNXpBpHcxeZkh5hbRZRq3/ickT3crtj/OzViWBwPDjnrwYcO5f kKo4j8AMd8Ttj+l1fUh/Yig= X-Google-Smtp-Source: ACHHUZ4xGOfAeXCQkT8PdQTvkn+mK4dCIMtuNJTz+fYfipfUEaU1KkQjGchMKP9tnBUx2OECl8HSsw== X-Received: by 2002:a05:6a20:9385:b0:11f:92d2:1442 with SMTP id x5-20020a056a20938500b0011f92d21442mr15410782pzh.29.1687341778659; Wed, 21 Jun 2023 03:02:58 -0700 (PDT) Received: from localhost.localdomain (2001-b400-e254-4eda-2716-05ea-20f5-b048.emome-ip6.hinet.net. [2001:b400:e254:4eda:2716:5ea:20f5:b048]) by smtp.gmail.com with ESMTPSA id g2-20020aa78742000000b0064f46570bb7sm2611196pfo.167.2023.06.21.03.02.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 Jun 2023 03:02:58 -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 V8 20/23] mmc: sdhci-uhs2: add add_host() and others to set up the driver Date: Wed, 21 Jun 2023 18:01:48 +0800 Message-Id: <20230621100151.6329-21-victorshihgli@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230621100151.6329-1-victorshihgli@gmail.com> References: <20230621100151.6329-1-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 add_host/remove_host operation. Any sdhci drivers which are capable of handling UHS-II cards must call those functions instead of the corresponding sdhci's. Updates in V8: - Change return type to void for __sdhci_uhs2_add_host_v4(). - Remove unused variables in __sdhci_uhs2_add_host_v4(). Updates in V7: - __sdhci_add_host() to instead of __sdhci_uhs2_add_host() in sdhci_uhs2_add_host(). - Cancel export state of some functions. Updates in V6: - Add complete_work_fn/thread_irq_fn variables in struct sdhci_host. - Use complete_work_fn/thread_irq_fn variables in sdhci_alloc_host() and sdhci_uhs2_add_host(). - Use sdhci_uhs2_mode() to simplify code in __sdhci_uhs2_remove_host(). Signed-off-by: Ben Chuang Signed-off-by: AKASHI Takahiro Signed-off-by: Victor Shih --- drivers/mmc/host/sdhci-uhs2.c | 102 ++++++++++++++++++++++++++++++++++ drivers/mmc/host/sdhci-uhs2.h | 2 + drivers/mmc/host/sdhci.c | 7 ++- drivers/mmc/host/sdhci.h | 3 + 4 files changed, 112 insertions(+), 2 deletions(-) diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c index f92a5cd5800d..0adc3e9ca1b0 100644 --- a/drivers/mmc/host/sdhci-uhs2.c +++ b/drivers/mmc/host/sdhci-uhs2.c @@ -16,6 +16,7 @@ #include #include #include +#include #include "sdhci.h" #include "sdhci-uhs2.h" @@ -997,6 +998,107 @@ static irqreturn_t sdhci_uhs2_thread_irq(int irq, void *dev_id) return IRQ_HANDLED; } +/*****************************************************************************\ + * + * Device allocation/registration * + * * +\*****************************************************************************/ + +static void __sdhci_uhs2_add_host_v4(struct sdhci_host *host, u32 caps1) +{ + struct mmc_host *mmc; + u32 max_current_caps2; + + mmc = host->mmc; + + /* Support UHS2 */ + if (caps1 & SDHCI_SUPPORT_UHS2) + mmc->caps2 |= MMC_CAP2_SD_UHS2; + + max_current_caps2 = sdhci_readl(host, SDHCI_MAX_CURRENT_1); + + if ((caps1 & SDHCI_CAN_VDD2_180) && + !max_current_caps2 && + !IS_ERR(mmc->supply.vmmc2)) { + /* UHS2 - VDD2 */ + int curr = regulator_get_current_limit(mmc->supply.vmmc2); + + if (curr > 0) { + /* convert to SDHCI_MAX_CURRENT format */ + curr = curr / 1000; /* convert to mA */ + curr = curr / SDHCI_MAX_CURRENT_MULTIPLIER; + curr = min_t(u32, curr, SDHCI_MAX_CURRENT_LIMIT); + max_current_caps2 = curr; + } + } + + if (caps1 & SDHCI_CAN_VDD2_180) + mmc->ocr_avail_uhs2 |= MMC_VDD_165_195; + else + mmc->caps2 &= ~MMC_CAP2_SD_UHS2; +} + +static int sdhci_uhs2_host_ops_init(struct sdhci_host *host); + +static void __sdhci_uhs2_remove_host(struct sdhci_host *host, int dead) +{ + if (!sdhci_uhs2_mode(host)) + return; + + if (!dead) + sdhci_uhs2_reset(host, SDHCI_UHS2_SW_RESET_FULL); +} + +int sdhci_uhs2_add_host(struct sdhci_host *host) +{ + struct mmc_host *mmc = host->mmc; + int ret; + + ret = sdhci_setup_host(host); + if (ret) + return ret; + + if (host->version >= SDHCI_SPEC_400) + __sdhci_uhs2_add_host_v4(host, host->caps1); + + if ((mmc->caps2 & MMC_CAP2_SD_UHS2) && !host->v4_mode) + /* host doesn't want to enable UHS2 support */ + mmc->caps2 &= ~MMC_CAP2_SD_UHS2; + + /* overwrite ops */ + if (mmc->caps2 & MMC_CAP2_SD_UHS2) + sdhci_uhs2_host_ops_init(host); + + host->complete_work_fn = sdhci_uhs2_complete_work; + host->thread_irq_fn = sdhci_uhs2_thread_irq; + + /* LED support not implemented for UHS2 */ + host->quirks |= SDHCI_QUIRK_NO_LED; + + ret = __sdhci_add_host(host); + if (ret) + goto cleanup; + + return 0; + +cleanup: + if (host->version >= SDHCI_SPEC_400) + __sdhci_uhs2_remove_host(host, 0); + + sdhci_cleanup_host(host); + + return ret; +} +EXPORT_SYMBOL_GPL(sdhci_uhs2_add_host); + +void sdhci_uhs2_remove_host(struct sdhci_host *host, int dead) +{ + __sdhci_uhs2_remove_host(host, dead); + + sdhci_remove_host(host, dead); +} +EXPORT_SYMBOL_GPL(sdhci_uhs2_remove_host); + void sdhci_uhs2_request(struct mmc_host *mmc, struct mmc_request *mrq) { struct sdhci_host *host = mmc_priv(mmc); diff --git a/drivers/mmc/host/sdhci-uhs2.h b/drivers/mmc/host/sdhci-uhs2.h index 3aa2cb4b39d6..bd5aae054c6f 100644 --- a/drivers/mmc/host/sdhci-uhs2.h +++ b/drivers/mmc/host/sdhci-uhs2.h @@ -186,5 +186,7 @@ void sdhci_uhs2_clear_set_irqs(struct sdhci_host *host, u32 clear, u32 set); void sdhci_uhs2_request(struct mmc_host *mmc, struct mmc_request *mrq); int sdhci_uhs2_request_atomic(struct mmc_host *mmc, struct mmc_request *mrq); u32 sdhci_uhs2_irq(struct sdhci_host *host, u32 intmask); +int sdhci_uhs2_add_host(struct sdhci_host *host); +void sdhci_uhs2_remove_host(struct sdhci_host *host, int dead); #endif /* __SDHCI_UHS2_H */ diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 144445e9f875..9e1469e76f1e 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -4106,6 +4106,9 @@ struct sdhci_host *sdhci_alloc_host(struct device *dev, host->max_timeout_count = 0xE; + host->complete_work_fn = sdhci_complete_work; + host->thread_irq_fn = sdhci_thread_irq; + return host; } @@ -4855,7 +4858,7 @@ int __sdhci_add_host(struct sdhci_host *host) if (!host->complete_wq) return -ENOMEM; - INIT_WORK(&host->complete_work, sdhci_complete_work); + INIT_WORK(&host->complete_work, host->complete_work_fn); timer_setup(&host->timer, sdhci_timeout_timer, 0); timer_setup(&host->data_timer, sdhci_timeout_data_timer, 0); @@ -4864,7 +4867,7 @@ int __sdhci_add_host(struct sdhci_host *host) sdhci_init(host, 0); - ret = request_threaded_irq(host->irq, sdhci_irq, sdhci_thread_irq, + ret = request_threaded_irq(host->irq, sdhci_irq, host->thread_irq_fn, IRQF_SHARED, mmc_hostname(mmc), host); if (ret) { pr_err("%s: Failed to request IRQ %d: %d\n", diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h index 20eb0943b402..f660d5040f6a 100644 --- a/drivers/mmc/host/sdhci.h +++ b/drivers/mmc/host/sdhci.h @@ -626,6 +626,9 @@ struct sdhci_host { struct timer_list timer; /* Timer for timeouts */ struct timer_list data_timer; /* Timer for data timeouts */ + void (*complete_work_fn)(struct work_struct *work); + irqreturn_t (*thread_irq_fn)(int irq, void *dev_id); + #if IS_ENABLED(CONFIG_MMC_SDHCI_EXTERNAL_DMA) struct dma_chan *rx_chan; struct dma_chan *tx_chan;