From patchwork Thu Jun 20 10:44:35 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Victor Shih X-Patchwork-Id: 806250 Received: from mail-pl1-f174.google.com (mail-pl1-f174.google.com [209.85.214.174]) (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 9B7371AB50E; Thu, 20 Jun 2024 10:45:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.174 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718880346; cv=none; b=jGYjdZS4iLXaYECwgD5SMe2qti9NUoZKunpJWzJIAhs06m0HVh4qX1+C0H1Y6UwKzufJdEhoIcVsqdkptrWt45/PNpu6amQf8zSBQ195r2jFY+0BU4HZocFvyhdsNVHgZtvYOXuM4PxJ4VqgSF70X0m9Fp0L48IIdSUukSzENtQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718880346; c=relaxed/simple; bh=+dwK5282uCMsnjW1mk1L8dKJumjWhVd+pfUeWylbOt8=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=mPaZu9QmIuUOa7m/pbV4KoqDOS2Bf2opjLVDUgCUWfRsfdEkOCAhu+q48z9btAC2B8jOfcjL5gOcEpGDu+qT7mSzmsVW+2jp7ASSjnWnyftvE8jTsBZ8h9Fnjg6/k+/SJw3PeUwhyJWT8Dgeq9z94mz2jgogx+7VqBrvPrcTcN8= 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=Rc7H75ud; arc=none smtp.client-ip=209.85.214.174 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="Rc7H75ud" Received: by mail-pl1-f174.google.com with SMTP id d9443c01a7336-1f64ecb1766so5472115ad.1; Thu, 20 Jun 2024 03:45:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1718880344; x=1719485144; 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=xOdkXrgNTgcSvN5kJ0Vv+BY8p0cgmlvV1dWGrb2VSKU=; b=Rc7H75udqruKvo+KS501kAb/wPrg1xXAPkQU0MqmbrpMdGskdbkUZw3LzpzS50HoKy UYestONUqM5DPDq3cpwJpgs6zqxf9Rtpu65O7C0RgGJeSOMOS7VQOff3dyI/JPY6doda xi5/islTZ6zUOSb2SBNapTjceuXNeYG0/GyXLNp7UWL66aH4fjcp+AiL48nKOigXP6gN SRQHTAMPDNXNBD8sCOrlDSQ0AinBDv+IodeQcXk4Au4EspQZ7cq67OZDrtiB1uWKRflw blLyuWm6Sj0cTNeX6Nh0rD7H8PhYXwnpaNRfh1sLconH4t7AOmFyTzftmJf1kZ/whw4Q clUg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1718880344; x=1719485144; 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=xOdkXrgNTgcSvN5kJ0Vv+BY8p0cgmlvV1dWGrb2VSKU=; b=eFTUHssQiVMgmW9GEd3NmAJEYnp6BvPu1YUZG4e+OMrq32zVZBvEyFNnGTliVaPSua mOH7zXiNkOCq7pQhvh8RQxLloh0qqI/IA86F4iPJpPWqV7Rv4w97lxrjfwLI87EB5OSw y0skvRHQMOdm3TbRWCmPUJhKy0dpwjozR3bIw/f5ZKkctPb7ObOJNrKwxmLrI9YK3g5m GjvKkP+Vevf1etAsCPcp/aagLe03GU9yekAqbICPHU6EN2Knc1oO28ZO/fjHii6rx0DC 6+OTYoguBqcbFJWlMwRxFlmMZ0mj27S3KKKRXVvf0amrpTpeiVKnkHZX3zt8D9Xjll3i pIjA== X-Forwarded-Encrypted: i=1; AJvYcCVBCP04LB88kGqLzuJzeYXsRBML9P52ZTajTxDWNJ7Vs5eBXWLTC6ytlUNJo5dxRBq4srJAOpfG3XENzZ+RCohguDWO/S24w9nStjyB X-Gm-Message-State: AOJu0YxWNoIqE9sC01oj3y+PVWkt0oVV5WVMXvrvaqKs9Vt5NiC4oOkt v65/FnRSnzPf1umGBPutrlHT32rA1fMGDwNWVqLaX2+LMEDwbKpz X-Google-Smtp-Source: AGHT+IFfT5UDqdWP/tPiT0dnJWnoUhGGY3BmAjEn6NRBuhFHyK0WqbabXr9ndt/4YB7G+KcI7VpS5g== X-Received: by 2002:a17:902:f550:b0:1f9:b301:dc6 with SMTP id d9443c01a7336-1f9b30111f9mr41047455ad.7.1718880343887; Thu, 20 Jun 2024 03:45:43 -0700 (PDT) Received: from localhost.localdomain (2001-b400-e28a-abbc-b19b-27f2-8368-202e.emome-ip6.hinet.net. [2001:b400:e28a:abbc:b19b:27f2:8368:202e]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-1f855e55ca1sm134007805ad.49.2024.06.20.03.45.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 20 Jun 2024 03:45:43 -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 V17 13/22] mmc: sdhci-uhs2: add set_timeout() Date: Thu, 20 Jun 2024 18:44:35 +0800 Message-Id: <20240620104444.5862-14-victorshihgli@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240620104444.5862-1-victorshihgli@gmail.com> References: <20240620104444.5862-1-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_timeout() operation. Use sdhci_uhs2_set_timeout() to set and calculate the timeout time. Signed-off-by: Ben Chuang Signed-off-by: AKASHI Takahiro Signed-off-by: Victor Shih --- Updates in V14: - Use mmc_card_uhs2() to stead sdhci_uhs2_mode() in the sdhci_uhs2_set_timeout(). Updates in V13: - Modify comment message. Updates in V8: - Initialization be combined with declaration and realigned in sdhci_calc_timeout_uhs2(). - Forward declare struct mmc_command in sdhci_uhs2.h. Updates in V6: - Use GENMASK() and FIELD_PREP() in some case. - Use sdhci_uhs2_mode() to simplify code. - Remove unnecessary functions. --- drivers/mmc/host/sdhci-uhs2.c | 72 +++++++++++++++++++++++++++++++++++ drivers/mmc/host/sdhci-uhs2.h | 2 + 2 files changed, 74 insertions(+) diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c index 0cfe9a3f91f7..8bd2baa79d76 100644 --- a/drivers/mmc/host/sdhci-uhs2.c +++ b/drivers/mmc/host/sdhci-uhs2.c @@ -13,6 +13,7 @@ #include #include #include +#include #include "sdhci.h" #include "sdhci-uhs2.h" @@ -135,6 +136,77 @@ void sdhci_uhs2_set_power(struct sdhci_host *host, unsigned char mode, unsigned } EXPORT_SYMBOL_GPL(sdhci_uhs2_set_power); +static u8 sdhci_calc_timeout_uhs2(struct sdhci_host *host, u8 *cmd_res, u8 *dead_lock) +{ + /* timeout in us */ + unsigned int dead_lock_timeout = 1 * 1000 * 1000; + unsigned int cmd_res_timeout = 5 * 1000; + unsigned int current_timeout; + u8 count; + + /* + * Figure out needed cycles. + * We do this in steps in order to fit inside a 32 bit int. + * The first step is the minimum timeout, which will have a + * minimum resolution of 6 bits: + * (1) 2^13*1000 > 2^22, + * (2) host->timeout_clk < 2^16 + * => + * (1) / (2) > 2^6 + */ + count = 0; + current_timeout = (1 << 13) * 1000 / host->timeout_clk; + while (current_timeout < cmd_res_timeout) { + count++; + current_timeout <<= 1; + if (count >= 0xF) + break; + } + + if (count >= 0xF) { + DBG("%s: Too large timeout 0x%x requested for CMD_RES!\n", + mmc_hostname(host->mmc), count); + count = 0xE; + } + *cmd_res = count; + + count = 0; + current_timeout = (1 << 13) * 1000 / host->timeout_clk; + while (current_timeout < dead_lock_timeout) { + count++; + current_timeout <<= 1; + if (count >= 0xF) + break; + } + + if (count >= 0xF) { + DBG("%s: Too large timeout 0x%x requested for DEADLOCK!\n", + mmc_hostname(host->mmc), count); + count = 0xE; + } + *dead_lock = count; + + return count; +} + +static void __sdhci_uhs2_set_timeout(struct sdhci_host *host) +{ + u8 cmd_res, dead_lock; + + sdhci_calc_timeout_uhs2(host, &cmd_res, &dead_lock); + cmd_res |= FIELD_PREP(SDHCI_UHS2_TIMER_CTRL_DEADLOCK_MASK, dead_lock); + sdhci_writeb(host, cmd_res, SDHCI_UHS2_TIMER_CTRL); +} + +void sdhci_uhs2_set_timeout(struct sdhci_host *host, struct mmc_command *cmd) +{ + __sdhci_set_timeout(host, cmd); + + if (mmc_card_uhs2(host->mmc)) + __sdhci_uhs2_set_timeout(host); +} +EXPORT_SYMBOL_GPL(sdhci_uhs2_set_timeout); + /*****************************************************************************\ * * * Driver init/exit * diff --git a/drivers/mmc/host/sdhci-uhs2.h b/drivers/mmc/host/sdhci-uhs2.h index 3efa8dd690bf..9bd3f610cf8c 100644 --- a/drivers/mmc/host/sdhci-uhs2.h +++ b/drivers/mmc/host/sdhci-uhs2.h @@ -175,9 +175,11 @@ #define SDHCI_UHS2_VENDOR_PTR 0xE8 struct sdhci_host; +struct mmc_command; 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); +void sdhci_uhs2_set_timeout(struct sdhci_host *host, struct mmc_command *cmd); #endif /* __SDHCI_UHS2_H */