From nobody Tue Nov 26 14:24:48 2024 Received: from mail-pl1-f172.google.com (mail-pl1-f172.google.com [209.85.214.172]) (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 8EC5F202F72; Fri, 18 Oct 2024 10:54:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729248856; cv=none; b=AsA5jroraVkfxqdW8MdYT3dHo4IStJMgbTWD6LAHFAmpTfYcxAyY05XJ7VWFbBjV67Rv/ks0heBHPCtNFh2BaSXDVE/Oj/wzftTgcg41JkyM0hj5ql5k5srKDPehU93LMgJPRU9VjlWWACcy+9NNMh3DTusZ1QRvaybwm5V6/D0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729248856; c=relaxed/simple; bh=VB5pAfZlY5yWHbxrV1VvySF25vuCBwsa2Yimme8Jx9w=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=aDkVxNHb0ALm6w0xCPjvN/qowHcAX3hSwKYIko6ceFmcAHnPW0VXSfOzzVsmvBFhlIeEJkdzRRmitP87GLixL40NyeYqdblQ3F/dxKL/6COSoreiy1hjQr2gUywP7uXzNS8IZtBxay8wZ5kC6gS3Al19EyebYfIqbqNFWxkpudU= 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=D0dQhcQM; arc=none smtp.client-ip=209.85.214.172 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="D0dQhcQM" Received: by mail-pl1-f172.google.com with SMTP id d9443c01a7336-20c693b68f5so21559835ad.1; Fri, 18 Oct 2024 03:54:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1729248854; x=1729853654; 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=hGS5FnAtxOoJb/6wOxS2ea2cNEevmIiG+LI1be0l3jU=; b=D0dQhcQMA6eKkLGL575yWpfECiBAtDFsx7VxVRvaV4PIs6uyUIoz387CKDPhPhH1wy 4EJ87rNhU7bKuKmHCJxn6e1NzgBw2FtsLaRu4bHXLpioOD3rXVbhWNFAJNvPg1mXia+q 2vLTjLciQh83TtJJzUNZV7KcHEuzj7kaExco4h9XvQFimbefmSZ35LxiFnpAOtPsccc5 SGYWrAOOhNgHNXu/ne6nA/i3c5ZpvHg+79aQSi23zfmxFsj6/Cp/LdNmKyvbr+IVs9D1 1O6XpGcJOkv6+fLhDIfdS3riKSpS2lYRI2H95bBvhE3jNIdYVQdjnXnXtuD4FME9JZqX RhWg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1729248854; x=1729853654; 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=hGS5FnAtxOoJb/6wOxS2ea2cNEevmIiG+LI1be0l3jU=; b=eFtYuxDEr/YkcLnaD9cUSNiIls1FizVjloUYBEj2bHtxXbj4DfLd9dKnzN5FuxEkzX 5fIzmtmuVGSG3A4y9t1lXbD/O7FDdcclV8v3ZmcgdAg+rXJ/z1TrvXR2ForJIRU7PdU3 3AxfhPZIJqh2auT9/IfFbdgJ37RbKbU+bzQsKS8Jj2IQpr3EaG+t7Mrx6WCXRGPNkjSW JmUX5hzBxcpFu0qzPhRbvWTX15MTmFk5pt2d+Vg9frS2D/vOBp8jvOMiCqkx9lI4KZqN 6KnBcTJil/yvVp/I6sDK1H1xjrYdI9OO/bp/CGv3VLBWhPwxd8QCi09WEGMLVp6LyWbg S7zg== X-Forwarded-Encrypted: i=1; AJvYcCVfhg0hx+9I8l5ufG7k3aABRsJoeJDnsb6NTheJ3pFnvfSEec6wSK1/JwX262FwCGRGZGOF59bn80EY5oM=@vger.kernel.org X-Gm-Message-State: AOJu0YyrkMkBvWt4fTmk9n1Bm7XOjMlJnDS3fpEn4j1pIPTA3kNNT8hS Yk+kglN9fVFFIxxgGB9UacyF7FrWJ6BixtwPyCUazsShh8x+iK5JV+q/3A== X-Google-Smtp-Source: AGHT+IGFIw4MCpwUYyysC9aeT84AnFkvJ4pEVcGeOW//2XwIrhsz/5/0eVfHmRpLlUCXUwnsecVyyQ== X-Received: by 2002:a17:903:32c2:b0:20c:b274:34d0 with SMTP id d9443c01a7336-20e5a913801mr23688565ad.46.1729248853826; Fri, 18 Oct 2024 03:54:13 -0700 (PDT) Received: from localhost.localdomain ([2402:7500:47a:11ee:3789:3bcf:d64f:bc9a]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-20e5a8fa20esm10237455ad.234.2024.10.18.03.54.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 18 Oct 2024 03:54:13 -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 V23 07/16] mmc: sdhci-uhs2: add set_timeout() Date: Fri, 18 Oct 2024 18:53:24 +0800 Message-Id: <20241018105333.4569-8-victorshihgli@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20241018105333.4569-1-victorshihgli@gmail.com> References: <20241018105333.4569-1-victorshihgli@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 756e44d84b87..6b249eb8395a 100644 --- a/drivers/mmc/host/sdhci-uhs2.c +++ b/drivers/mmc/host/sdhci-uhs2.c @@ -13,6 +13,7 @@ #include #include #include +#include =20 #include "sdhci.h" #include "sdhci-uhs2.h" @@ -135,6 +136,77 @@ void sdhci_uhs2_set_power(struct sdhci_host *host, uns= igned char mode, unsigned } EXPORT_SYMBOL_GPL(sdhci_uhs2_set_power); =20 +static u8 sdhci_calc_timeout_uhs2(struct sdhci_host *host, u8 *cmd_res, u8= *dead_lock) +{ + /* timeout in us */ + unsigned int dead_lock_timeout =3D 1 * 1000 * 1000; + unsigned int cmd_res_timeout =3D 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 + * =3D> + * (1) / (2) > 2^6 + */ + count =3D 0; + current_timeout =3D (1 << 13) * 1000 / host->timeout_clk; + while (current_timeout < cmd_res_timeout) { + count++; + current_timeout <<=3D 1; + if (count >=3D 0xF) + break; + } + + if (count >=3D 0xF) { + DBG("%s: Too large timeout 0x%x requested for CMD_RES!\n", + mmc_hostname(host->mmc), count); + count =3D 0xE; + } + *cmd_res =3D count; + + count =3D 0; + current_timeout =3D (1 << 13) * 1000 / host->timeout_clk; + while (current_timeout < dead_lock_timeout) { + count++; + current_timeout <<=3D 1; + if (count >=3D 0xF) + break; + } + + if (count >=3D 0xF) { + DBG("%s: Too large timeout 0x%x requested for DEADLOCK!\n", + mmc_hostname(host->mmc), count); + count =3D 0xE; + } + *dead_lock =3D 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 |=3D 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 *c= md) +{ + __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 =20 struct sdhci_host; +struct mmc_command; =20 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, uns= igned short vdd); +void sdhci_uhs2_set_timeout(struct sdhci_host *host, struct mmc_command *c= md); =20 #endif /* __SDHCI_UHS2_H */ --=20 2.25.1