From patchwork Mon Jun 3 15:55:24 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ludovic BARRE X-Patchwork-Id: 10973123 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8804D13AD for ; Mon, 3 Jun 2019 15:55:55 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 74FB91FE8D for ; Mon, 3 Jun 2019 15:55:55 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 679892870B; Mon, 3 Jun 2019 15:55:55 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CA6911FE8D for ; Mon, 3 Jun 2019 15:55:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729404AbfFCPzu (ORCPT ); Mon, 3 Jun 2019 11:55:50 -0400 Received: from mx07-00178001.pphosted.com ([62.209.51.94]:45177 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729470AbfFCPzm (ORCPT ); Mon, 3 Jun 2019 11:55:42 -0400 Received: from pps.filterd (m0046037.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x53FfkpR011076; Mon, 3 Jun 2019 17:55:31 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=st.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=STMicroelectronics; bh=iNWd3cwLu6Tc/UdBGrhyPRUAQ2FoA6L9lTKT3A4+cWQ=; b=ZmjQVicQLVh1PfhedoMFX4GBy8+ap78FvfhUie89bumpuRS7lnKM/SZyBh5B6psZ94la DX7DZS1aSL7mdmGkKctZtLvrlnlEib2GFUlvQh6vR4V4sY+uIareodO7p6VAdwbT0PKn SDtHoywAFTcCavjXBKsGgr08g+FAv8OHhDt3oE/AO26yKwN3tldBVYWW+ElUe7gfZlth 662LN5T6XMKSCKzHGJehirnjK7Xk8lygBu2pq2XgqXD3qrrMoEWY6d5dgQCpQy26WDja XYgGIR6+asxDeQ/Nqwc03nk8htQDIYHKDuqLHFWD/5n35g1DOeS+4mtL2LRydO+sJSOT 6g== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 2sunmc2xs5-1 (version=TLSv1 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NOT); Mon, 03 Jun 2019 17:55:31 +0200 Received: from zeta.dmz-eu.st.com (zeta.dmz-eu.st.com [164.129.230.9]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 81C7931; Mon, 3 Jun 2019 15:55:30 +0000 (GMT) Received: from Webmail-eu.st.com (Safex1hubcas22.st.com [10.75.90.92]) by zeta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 604014E69; Mon, 3 Jun 2019 15:55:30 +0000 (GMT) Received: from SAFEX1HUBCAS23.st.com (10.75.90.47) by Safex1hubcas22.st.com (10.75.90.92) with Microsoft SMTP Server (TLS) id 14.3.439.0; Mon, 3 Jun 2019 17:55:30 +0200 Received: from lmecxl0923.lme.st.com (10.48.0.237) by webmail-ga.st.com (10.75.90.48) with Microsoft SMTP Server (TLS) id 14.3.439.0; Mon, 3 Jun 2019 17:55:29 +0200 From: Ludovic Barre To: Ulf Hansson , Rob Herring CC: , Maxime Coquelin , Alexandre Torgue , , , , , , Ludovic Barre Subject: [PATCH V3 2/3] mmc: mmci: add hardware busy timeout feature Date: Mon, 3 Jun 2019 17:55:24 +0200 Message-ID: <1559577325-19266-3-git-send-email-ludovic.Barre@st.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1559577325-19266-1-git-send-email-ludovic.Barre@st.com> References: <1559577325-19266-1-git-send-email-ludovic.Barre@st.com> MIME-Version: 1.0 X-Originating-IP: [10.48.0.237] X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-06-03_12:,, signatures=0 Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Ludovic Barre In some variants, the data timer is enabled when the DPSM is in busy state (while data transfer or MMC_RSP_BUSY), and could generate a data timeout error if the counter reach 0. -Define max_busy_timeout (in ms) according to clock. -Set data timer register if the command has rsp_busy flag. If busy_timeout is not defined by framework, the busy length after Data Burst is defined as 1 second (refer: 4.6.2.2 Write of sd specification part1 v6-0). -Add MCI_DATATIMEOUT error management in mmci_cmd_irq. Signed-off-by: Ludovic Barre --- drivers/mmc/host/mmci.c | 40 ++++++++++++++++++++++++++++++++++------ drivers/mmc/host/mmci.h | 2 ++ 2 files changed, 36 insertions(+), 6 deletions(-) diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c index 5b5cc45..5a8b232 100644 --- a/drivers/mmc/host/mmci.c +++ b/drivers/mmc/host/mmci.c @@ -1078,6 +1078,7 @@ static void mmci_start_command(struct mmci_host *host, struct mmc_command *cmd, u32 c) { void __iomem *base = host->base; + unsigned long long clks = 0; dev_dbg(mmc_dev(host->mmc), "op %02x arg %08x flags %08x\n", cmd->opcode, cmd->arg, cmd->flags); @@ -1100,6 +1101,19 @@ mmci_start_command(struct mmci_host *host, struct mmc_command *cmd, u32 c) else c |= host->variant->cmdreg_srsp; } + + if (host->variant->busy_timeout && !cmd->data) { + if (cmd->flags & MMC_RSP_BUSY) { + if (!cmd->busy_timeout) + cmd->busy_timeout = 1000; + + clks = (unsigned long long)cmd->busy_timeout; + clks *= host->cclk; + do_div(clks, MSEC_PER_SEC); + } + writel_relaxed(clks, host->base + MMCIDATATIMER); + } + if (/*interrupt*/0) c |= MCI_CPSM_INTERRUPT; @@ -1206,6 +1220,7 @@ mmci_cmd_irq(struct mmci_host *host, struct mmc_command *cmd, { void __iomem *base = host->base; bool sbc, busy_resp; + u32 err_msk; if (!cmd) return; @@ -1218,8 +1233,12 @@ mmci_cmd_irq(struct mmci_host *host, struct mmc_command *cmd, * handling. Note that we tag on any latent IRQs postponed * due to waiting for busy status. */ - if (!((status|host->busy_status) & - (MCI_CMDCRCFAIL|MCI_CMDTIMEOUT|MCI_CMDSENT|MCI_CMDRESPEND))) + err_msk = MCI_CMDCRCFAIL | MCI_CMDTIMEOUT; + if (host->variant->busy_timeout && busy_resp) + err_msk |= MCI_DATATIMEOUT; + + if (!((status | host->busy_status) & + (err_msk | MCI_CMDSENT | MCI_CMDRESPEND))) return; /* @@ -1228,7 +1247,7 @@ mmci_cmd_irq(struct mmci_host *host, struct mmc_command *cmd, if (busy_resp && host->variant->busy_detect) { /* We are busy with a command, return */ - if (host->busy_status && + if (host->busy_status && !(status & (err_msk)) && (status & host->variant->busy_detect_flag)) return; @@ -1238,8 +1257,7 @@ mmci_cmd_irq(struct mmci_host *host, struct mmc_command *cmd, * that the special busy status bit is still set before * proceeding. */ - if (!host->busy_status && - !(status & (MCI_CMDCRCFAIL|MCI_CMDTIMEOUT)) && + if (!host->busy_status && !(status & (err_msk)) && (status & host->variant->busy_detect_flag)) { /* Clear the busy start IRQ */ @@ -1282,6 +1300,9 @@ mmci_cmd_irq(struct mmci_host *host, struct mmc_command *cmd, cmd->error = -ETIMEDOUT; } else if (status & MCI_CMDCRCFAIL && cmd->flags & MMC_RSP_CRC) { cmd->error = -EILSEQ; + } else if (host->variant->busy_timeout && busy_resp && + status & MCI_DATATIMEOUT) { + cmd->error = -ETIMEDOUT; } else { cmd->resp[0] = readl(base + MMCIRESPONSE0); cmd->resp[1] = readl(base + MMCIRESPONSE1); @@ -1543,6 +1564,7 @@ static irqreturn_t mmci_irq(int irq, void *dev_id) status &= ~host->variant->busy_detect_flag; ret = 1; + } while (status); spin_unlock(&host->lock); @@ -1947,6 +1969,8 @@ static int mmci_probe(struct amba_device *dev, * Enable busy detection. */ if (variant->busy_detect) { + u32 max_busy_timeout = 0; + mmci_ops.card_busy = mmci_card_busy; /* * Not all variants have a flag to enable busy detection @@ -1956,7 +1980,11 @@ static int mmci_probe(struct amba_device *dev, mmci_write_datactrlreg(host, host->variant->busy_dpsm_flag); mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY; - mmc->max_busy_timeout = 0; + + if (variant->busy_timeout) + max_busy_timeout = ~0UL / (mmc->f_max / MSEC_PER_SEC); + + mmc->max_busy_timeout = max_busy_timeout; } /* Prepare a CMD12 - needed to clear the DPSM on some variants. */ diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h index 4f071bd..b43a958 100644 --- a/drivers/mmc/host/mmci.h +++ b/drivers/mmc/host/mmci.h @@ -290,6 +290,7 @@ struct mmci_host; * @signal_direction: input/out direction of bus signals can be indicated * @pwrreg_clkgate: MMCIPOWER register must be used to gate the clock * @busy_detect: true if the variant supports busy detection on DAT0. + * @busy_timeout: true if the variant supports hardware busy timeout on R1B. * @busy_dpsm_flag: bitmask enabling busy detection in the DPSM * @busy_detect_flag: bitmask identifying the bit in the MMCISTATUS register * indicating that the card is busy @@ -336,6 +337,7 @@ struct variant_data { u8 signal_direction:1; u8 pwrreg_clkgate:1; u8 busy_detect:1; + u8 busy_timeout:1; u32 busy_dpsm_flag; u32 busy_detect_flag; u32 busy_detect_mask;