From patchwork Wed Jul 10 19:21:12 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guennadi Liakhovetski X-Patchwork-Id: 2825875 Return-Path: X-Original-To: patchwork-linux-sh@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 074899F756 for ; Wed, 10 Jul 2013 19:21:53 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id EBF6A20165 for ; Wed, 10 Jul 2013 19:21:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CD9C820161 for ; Wed, 10 Jul 2013 19:21:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754939Ab3GJTVt (ORCPT ); Wed, 10 Jul 2013 15:21:49 -0400 Received: from moutng.kundenserver.de ([212.227.126.187]:63949 "EHLO moutng.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755147Ab3GJTVc (ORCPT ); Wed, 10 Jul 2013 15:21:32 -0400 Received: from axis700.grange (dslb-178-001-141-087.pools.arcor-ip.net [178.1.141.87]) by mrelayeu.kundenserver.de (node=mrbap3) with ESMTP (Nemesis) id 0MQODc-1UkwCY0nyW-00Tp6i; Wed, 10 Jul 2013 21:21:18 +0200 Received: from 6a.grange (6a.grange [192.168.1.11]) by axis700.grange (Postfix) with ESMTPS id AD4BB40BB3; Wed, 10 Jul 2013 21:21:17 +0200 (CEST) Received: from lyakh by 6a.grange with local (Exim 4.72) (envelope-from ) id 1Uwzwz-0002jE-EP; Wed, 10 Jul 2013 21:21:17 +0200 From: Guennadi Liakhovetski To: linux-mmc@vger.kernel.org Cc: linux-sh@vger.kernel.org, Magnus Damm , Simon Horman , Chris Ball , Nobuyuki HIRAI , Guennadi Liakhovetski Subject: [PATCH 1/6] mmc: sh_mmcif: revision-specific Command Completion Signal handling Date: Wed, 10 Jul 2013 21:21:12 +0200 Message-Id: <1373484077-10460-2-git-send-email-g.liakhovetski@gmx.de> X-Mailer: git-send-email 1.7.2.5 In-Reply-To: <1373484077-10460-1-git-send-email-g.liakhovetski@gmx.de> References: <1373484077-10460-1-git-send-email-g.liakhovetski@gmx.de> X-Provags-ID: V02:K0:cUYKwNAX4DRueettFIK5yECfmErK4eray4hzyapWlu2 gG734PGMT5znkhb5Iew8LLP9XoA/75gVY8vovGGSfS76zSchDW 0Zur8sn/stE2vv8YV4eiOFlL7W//Bp/DAG2lYjjGLWNIUPWrvO mwA2eXqEqa2Wjhzi1+XhOwuaSWSd7NqMcL0EMoarNT3a8vHOdP xhYcNDXFdmiUGte5sxi0grq3n8KzVNR2m3psdkBZi/dsHE8BJ7 Y9psLAIwjFItj1Mkhz85nGx2rWuxZAfiPCBReEg3LQpRzSr7v3 3r1OizkD3Pw1Dx2Lbas0FyAhSVNi4jgQ+7jWu5Y6rYP+NiDHfo LjYUaDq53yVd03nlxVybhPyJb9HvhBQNzkAhp14ZS613A8TVsh we0MwiP3B2Shg== Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org X-Spam-Status: No, score=-7.2 required=5.0 tests=BAYES_00,FREEMAIL_FROM, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Some earlier MMCIF IP revisions contained Command Completion Signal support, which has been dropped again in modern versions. Sopport for this feature is added in a way to preserve the current behaviour by default, i.e. when it is not enabled in platform data. Patch is based on work by Nobuyuki HIRAI. Signed-off-by: Guennadi Liakhovetski --- drivers/mmc/host/sh_mmcif.c | 27 +++++++++++++++++++++------ include/linux/mmc/sh_mmcif.h | 1 + 2 files changed, 22 insertions(+), 6 deletions(-) diff --git a/drivers/mmc/host/sh_mmcif.c b/drivers/mmc/host/sh_mmcif.c index 06caaae..7be20c9 100644 --- a/drivers/mmc/host/sh_mmcif.c +++ b/drivers/mmc/host/sh_mmcif.c @@ -133,6 +133,8 @@ INT_BUFWEN | INT_CMD12DRE | INT_BUFRE | \ INT_DTRANE | INT_CMD12RBE | INT_CMD12CRE) +#define INT_CCS (INT_CCSTO | INT_CCSRCV | INT_CCSDE) + /* CE_INT_MASK */ #define MASK_ALL 0x00000000 #define MASK_MCCSDE (1 << 29) @@ -161,7 +163,7 @@ #define MASK_START_CMD (MASK_MCMDVIO | MASK_MBUFVIO | MASK_MWDATERR | \ MASK_MRDATERR | MASK_MRIDXERR | MASK_MRSPERR | \ - MASK_MCCSTO | MASK_MCRCSTO | MASK_MWDATTO | \ + MASK_MCRCSTO | MASK_MWDATTO | \ MASK_MRDATTO | MASK_MRBSYTO | MASK_MRSPTO) #define MASK_CLEAN (INT_ERR_STS | MASK_MRBSYE | MASK_MCRSPE | \ @@ -243,6 +245,7 @@ struct sh_mmcif_host { int sg_blkidx; bool power; bool card_present; + bool ccs_enable; /* Command Completion Signal support */ struct mutex thread_lock; /* DMA support */ @@ -485,8 +488,10 @@ static void sh_mmcif_sync_reset(struct sh_mmcif_host *host) sh_mmcif_writel(host->addr, MMCIF_CE_VERSION, SOFT_RST_ON); sh_mmcif_writel(host->addr, MMCIF_CE_VERSION, SOFT_RST_OFF); + if (host->ccs_enable) + tmp |= SCCSTO_29; sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, tmp | - SRSPTO_256 | SRBSYTO_29 | SRWDTO_29 | SCCSTO_29); + SRSPTO_256 | SRBSYTO_29 | SRWDTO_29); /* byte swap on */ sh_mmcif_bitset(host, MMCIF_CE_BUF_ACC, BUF_ACC_ATYP); } @@ -866,6 +871,9 @@ static void sh_mmcif_start_cmd(struct sh_mmcif_host *host, break; } + if (host->ccs_enable) + mask |= MASK_MCCSTO; + if (mrq->data) { sh_mmcif_writel(host->addr, MMCIF_CE_BLOCK_SET, 0); sh_mmcif_writel(host->addr, MMCIF_CE_BLOCK_SET, @@ -873,7 +881,10 @@ static void sh_mmcif_start_cmd(struct sh_mmcif_host *host, } opc = sh_mmcif_set_cmd(host, mrq); - sh_mmcif_writel(host->addr, MMCIF_CE_INT, 0xD80430C0); + if (host->ccs_enable) + sh_mmcif_writel(host->addr, MMCIF_CE_INT, 0xD80430C0); + else + sh_mmcif_writel(host->addr, MMCIF_CE_INT, 0xD80430C0 | INT_CCS); sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, mask); /* set arg */ sh_mmcif_writel(host->addr, MMCIF_CE_ARG, cmd->arg); @@ -1241,11 +1252,14 @@ static irqreturn_t sh_mmcif_irqt(int irq, void *dev_id) static irqreturn_t sh_mmcif_intr(int irq, void *dev_id) { struct sh_mmcif_host *host = dev_id; - u32 state; + u32 state, mask; state = sh_mmcif_readl(host->addr, MMCIF_CE_INT); - sh_mmcif_writel(host->addr, MMCIF_CE_INT, - ~(state & sh_mmcif_readl(host->addr, MMCIF_CE_INT_MASK))); + mask = sh_mmcif_readl(host->addr, MMCIF_CE_INT_MASK); + if (host->ccs_enable) + sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~(state & mask)); + else + sh_mmcif_writel(host->addr, MMCIF_CE_INT, INT_CCS | ~(state & mask)); sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, state & MASK_CLEAN); if (state & ~MASK_CLEAN) @@ -1375,6 +1389,7 @@ static int sh_mmcif_probe(struct platform_device *pdev) host->mmc = mmc; host->addr = reg; host->timeout = msecs_to_jiffies(1000); + host->ccs_enable = !pd || !pd->ccs_unsupported; host->pd = pdev; diff --git a/include/linux/mmc/sh_mmcif.h b/include/linux/mmc/sh_mmcif.h index e7d5dd6..b2a22b6 100644 --- a/include/linux/mmc/sh_mmcif.h +++ b/include/linux/mmc/sh_mmcif.h @@ -39,6 +39,7 @@ struct sh_mmcif_plat_data { unsigned int slave_id_tx; /* embedded slave_id_[tr]x */ unsigned int slave_id_rx; bool use_cd_gpio : 1; + bool ccs_unsupported : 1; unsigned int cd_gpio; u8 sup_pclk; /* 1 :SH7757, 0: SH7724/SH7372 */ unsigned long caps;