From patchwork Fri Mar 31 10:55:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Victor Shih X-Patchwork-Id: 669340 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 717A3C761AF for ; Fri, 31 Mar 2023 10:57:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231953AbjCaK55 (ORCPT ); Fri, 31 Mar 2023 06:57:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60506 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231818AbjCaK4y (ORCPT ); Fri, 31 Mar 2023 06:56:54 -0400 Received: from mail-pl1-x62b.google.com (mail-pl1-x62b.google.com [IPv6:2607:f8b0:4864:20::62b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2499E1DFB8; Fri, 31 Mar 2023 03:56:41 -0700 (PDT) Received: by mail-pl1-x62b.google.com with SMTP id o11so20895222ple.1; Fri, 31 Mar 2023 03:56:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; t=1680260200; 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=Wp30TZgq7jKbpo8InJLkytMfD3sdBwQgwReNUO4+h3A=; b=AMt6y63HsQkvVBB3Zl90YYI96BX3sSyiEmVwU15sWWTCfrngdEwCCD5PJLbd9pfBQc TwzS7RC1mydjAUl60PiuGX5Rfzcy+xLI6z3Pz3kQZUWNdTjmUmUEronBTUpj2dEm3gCV qdgvCiSJ/S1B35IrfC6+/12TDQ1y8WmHeWI/fs064v+W/+miiByDKuXpGitXmzrp8W6a m2q9A9U5GoBYeADyjPwhenyfCdZl1SlRa8zuKi2TYfRzQDbvWgsN1sAHtb2bd8fh+XfA N0OrC4tB+mZG1CZaHJJOJUK1jJi9bnxfv7K6Skuef7On8uC6zBR/q+gp42H/IAHO62nd f6jQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1680260200; 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=Wp30TZgq7jKbpo8InJLkytMfD3sdBwQgwReNUO4+h3A=; b=kF+7Jyn6rYL73smwG6GbNqVWDDqNdIlesoybO4PiFLIBOnZVL18p23n7rYHgIunG4T aL1Mgem+SiD3AE7X4cwtT6sL1r8jAGrGG/fIwsdgLBC16AVAV4yG7pZ1i9vl8k5BW8oZ dRyGs3bbGHnYFOTvKjqdS8mOuEtqNZE9Ey2BXBZl8s/fBWihL1Er2NiaCaRa5twu9RmP FkCobZn4leuPtOTa9K4Yiimn4ND7sE7jExxF3LoC61iSqEGz+pCIttRvBpvlB7BhIrvw AfWanEqeQNCbMfbXNmxgZodUEH9dWxzTnhjO0Sft6hoxxe/PyFgsibHkehynCYBDeVPP Apyw== X-Gm-Message-State: AAQBX9cl2Z9icWnrUTZorWJuF4ZCCzf7fDnlf1rVlWtYMoAAuzBw3QzP 3DHOYep1dSh/QPrtQpCwvLk= X-Google-Smtp-Source: AKy350ZUIzruzB86zr8AXQWvZYVP0R/wU3olY6cicgxPAPi5KG8xkGqnjiOKIM6XKXHNrKRtWf8W5Q== X-Received: by 2002:a17:90b:180a:b0:23f:aa93:6cfd with SMTP id lw10-20020a17090b180a00b0023faa936cfdmr29807856pjb.18.1680260200590; Fri, 31 Mar 2023 03:56:40 -0700 (PDT) Received: from localhost.localdomain (2001-b400-e25c-983f-c7ff-3efd-77d9-6c16.emome-ip6.hinet.net. [2001:b400:e25c:983f:c7ff:3efd:77d9:6c16]) by smtp.gmail.com with ESMTPSA id f19-20020a170902e99300b0019acd3151d0sm1287665plb.114.2023.03.31.03.56.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 31 Mar 2023 03:56:40 -0700 (PDT) From: Victor Shih X-Google-Original-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 Subject: [PATCH V7 13/23] mmc: sdhci-uhs2: add set_timeout() Date: Fri, 31 Mar 2023 18:55:36 +0800 Message-Id: <20230331105546.13607-14-victor.shih@genesyslogic.com.tw> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230331105546.13607-1-victor.shih@genesyslogic.com.tw> References: <20230331105546.13607-1-victor.shih@genesyslogic.com.tw> 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_timeout() operation. Signed-off-by: Ben Chuang Signed-off-by: AKASHI Takahiro Signed-off-by: Victor Shih --- drivers/mmc/host/sdhci-uhs2.c | 72 +++++++++++++++++++++++++++++++++++ drivers/mmc/host/sdhci-uhs2.h | 1 + 2 files changed, 73 insertions(+) diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c index 388d87537847..e2e9ce51b768 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" @@ -144,6 +145,77 @@ static void sdhci_uhs2_set_power(struct sdhci_host *host, unsigned char mode, } } +static u8 sdhci_calc_timeout_uhs2(struct sdhci_host *host, u8 *cmd_res, u8 *dead_lock) +{ + u8 count; + unsigned int cmd_res_timeout, dead_lock_timeout, current_timeout; + /* timeout in us */ + cmd_res_timeout = 5 * 1000; + dead_lock_timeout = 1 * 1000 * 1000; + + /* + * 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 (sdhci_uhs2_mode(host)) + __sdhci_uhs2_set_timeout(host); +} +EXPORT_SYMBOL_GPL(sdhci_uhs2_set_timeout); + /*****************************************************************************\ * * * MMC callbacks * diff --git a/drivers/mmc/host/sdhci-uhs2.h b/drivers/mmc/host/sdhci-uhs2.h index 6834893eee85..fc03a178b676 100644 --- a/drivers/mmc/host/sdhci-uhs2.h +++ b/drivers/mmc/host/sdhci-uhs2.h @@ -180,5 +180,6 @@ struct sdhci_host; void sdhci_uhs2_dump_regs(struct sdhci_host *host); bool sdhci_uhs2_mode(struct sdhci_host *host); void sdhci_uhs2_reset(struct sdhci_host *host, u16 mask); +void sdhci_uhs2_set_timeout(struct sdhci_host *host, struct mmc_command *cmd); #endif /* __SDHCI_UHS2_H */