From patchwork Tue Mar 6 06:58:51 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shawn Guo X-Patchwork-Id: 10260853 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 130B96037E for ; Tue, 6 Mar 2018 06:59:51 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0158328788 for ; Tue, 6 Mar 2018 06:59:51 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id EA0E728E6F; Tue, 6 Mar 2018 06:59:50 +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=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID 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 2D2EF28788 for ; Tue, 6 Mar 2018 06:59:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751060AbeCFG7t (ORCPT ); Tue, 6 Mar 2018 01:59:49 -0500 Received: from mail-pl0-f65.google.com ([209.85.160.65]:36510 "EHLO mail-pl0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750859AbeCFG7s (ORCPT ); Tue, 6 Mar 2018 01:59:48 -0500 Received: by mail-pl0-f65.google.com with SMTP id 61-v6so11364414plf.3 for ; Mon, 05 Mar 2018 22:59:47 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=HGS3ibBeJ+S+Z4XtlELpGYkNxGMVawJhPnVgjjRhu5I=; b=CKDC8vb8a4/cjvGLgskSoyTnXHeoXWXddzGKTUysclVDGitplLBhAZ60QWL4NF8XU5 h7JA5O22XnN1XfVyu7+/dJaBLwzSM7NTDVitaEZta5ZWmJlERMNFkZWf2oOUE418U1Fb 8OlnYeD2h5Mao/UnEV9skVW8OQwLe3FgNiSLs= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=HGS3ibBeJ+S+Z4XtlELpGYkNxGMVawJhPnVgjjRhu5I=; b=jtia7nqJNGXltVI8y5OrRZZIuLtuqoP1r5faJeE4GUC3xfKLbgknaX3CrVvgMfxSay 3vb5iplGEswwDQskLqZU41HDz0li8C9nDFom4kFTMsy3YHkH81umgQCJE1TEmt8+4rXG mTrrbDt25mEyTNicYF1eUa0YaWOUlKO/E+V78RCofdtTMIVh42KMrih/UBVhDcwUOl85 mr2cyvSPghWvdoCOq17O4qA1r6NGqVcL6qMCKMecbkwvLB7DgxeJCbOpljVF1WpZlhuA oujuKLgxcLy/GTxo9N+1GxAu45MKTyBpYDW2w1Nit9oxR7GKijoGQoPJ01nJ6YJx+Nyy x0jQ== X-Gm-Message-State: APf1xPDrgCxzEMrjJCvcgbBLCht62dLPPrxPHWRCnic0LQU6hCoC6Bme SgrUEkpGaKlbFX+fze/0EqN9Xw== X-Google-Smtp-Source: AG47ELsErpbt4vT+6WNiEiq5puEXs8Gf5vmbN70+bYmBzMMmrNWiNRXUKiE5JYK1MsFq2SSEBEPaUw== X-Received: by 2002:a17:902:9898:: with SMTP id s24-v6mr15591331plp.382.1520319587571; Mon, 05 Mar 2018 22:59:47 -0800 (PST) Received: from localhost.localdomain ([104.237.91.63]) by smtp.gmail.com with ESMTPSA id p12sm24023012pgn.91.2018.03.05.22.59.43 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 05 Mar 2018 22:59:46 -0800 (PST) From: Shawn Guo To: Ulf Hansson Cc: Jaehoon Chung , Rob Herring , tianshuliang , Jiancheng Xue , devicetree@vger.kernel.org, linux-mmc@vger.kernel.org, Shawn Guo Subject: [PATCH v2 2/2] mmc: dw_mmc: add support for hi3798cv200 specific extensions of dw-mshc Date: Tue, 6 Mar 2018 14:58:51 +0800 Message-Id: <1520319531-24661-3-git-send-email-shawn.guo@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1520319531-24661-1-git-send-email-shawn.guo@linaro.org> References: <1520319531-24661-1-git-send-email-shawn.guo@linaro.org> 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: tianshuliang Hi3798CV200 SoC extends the dw-mshc controller for additional clock and bus control. Add support for these extensions. Signed-off-by: tianshuliang Signed-off-by: Jiancheng Xue Signed-off-by: Shawn Guo --- drivers/mmc/host/Kconfig | 9 ++ drivers/mmc/host/Makefile | 1 + drivers/mmc/host/dw_mmc-hi3798cv200.c | 197 ++++++++++++++++++++++++++++++++++ 3 files changed, 207 insertions(+) create mode 100644 drivers/mmc/host/dw_mmc-hi3798cv200.c diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig index 620c2d90a646..de36fffe8225 100644 --- a/drivers/mmc/host/Kconfig +++ b/drivers/mmc/host/Kconfig @@ -718,6 +718,15 @@ config MMC_DW_EXYNOS Synopsys DesignWare Memory Card Interface driver. Select this option for platforms based on Exynos4 and Exynos5 SoC's. +config MMC_DW_HI3798CV200 + tristate "Hi3798CV200 specific extensions for Synopsys DW Memory Card Interface" + depends on MMC_DW + select MMC_DW_PLTFM + help + This selects support for HiSilicon Hi3798CV200 SoC specific extensions to the + Synopsys DesignWare Memory Card Interface driver. Select this option + for platforms based on HiSilicon Hi3798CV200 SoC. + config MMC_DW_K3 tristate "K3 specific extensions for Synopsys DW Memory Card Interface" depends on MMC_DW diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile index 84cd1388abc3..00ec9a2f59be 100644 --- a/drivers/mmc/host/Makefile +++ b/drivers/mmc/host/Makefile @@ -51,6 +51,7 @@ obj-$(CONFIG_MMC_CAVIUM_THUNDERX) += thunderx-mmc.o obj-$(CONFIG_MMC_DW) += dw_mmc.o obj-$(CONFIG_MMC_DW_PLTFM) += dw_mmc-pltfm.o obj-$(CONFIG_MMC_DW_EXYNOS) += dw_mmc-exynos.o +obj-$(CONFIG_MMC_DW_HI3798CV200) += dw_mmc-hi3798cv200.o obj-$(CONFIG_MMC_DW_K3) += dw_mmc-k3.o obj-$(CONFIG_MMC_DW_PCI) += dw_mmc-pci.o obj-$(CONFIG_MMC_DW_ROCKCHIP) += dw_mmc-rockchip.o diff --git a/drivers/mmc/host/dw_mmc-hi3798cv200.c b/drivers/mmc/host/dw_mmc-hi3798cv200.c new file mode 100644 index 000000000000..364ad3dd7116 --- /dev/null +++ b/drivers/mmc/host/dw_mmc-hi3798cv200.c @@ -0,0 +1,197 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2017 HiSilicon Technologies Co., Ltd. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "dw_mmc.h" +#include "dw_mmc-pltfm.h" + +#define SDMMC_DDR_REG 0x10c +#define SDMMC_DDR_HS400 BIT(31) +#define SDMMC_ENABLE_SH 0x110 +#define SDMMC_ENABLE_SH_PHASE BIT(0) + +#define SDMMC_UHS_DDR BIT(16) +#define ALL_INT_CLR 0x1efff + +struct hi3798cv200_priv { + struct clk *sample_clk; + struct clk *drive_clk; +}; + +static void dw_mci_hi3798cv200_set_ios(struct dw_mci *host, struct mmc_ios *ios) +{ + struct hi3798cv200_priv *priv = host->priv; + u32 val; + + val = mci_readl(host, UHS_REG); + if (ios->timing == MMC_TIMING_MMC_DDR52 || + ios->timing == MMC_TIMING_UHS_DDR50) + val |= SDMMC_UHS_DDR; + else + val &= ~SDMMC_UHS_DDR; + mci_writel(host, UHS_REG, val); + + val = mci_readl(host, ENABLE_SH); + if (ios->timing == MMC_TIMING_MMC_DDR52) + val |= SDMMC_ENABLE_SH_PHASE; + else + val &= ~SDMMC_ENABLE_SH_PHASE; + mci_writel(host, ENABLE_SH, val); + + val = mci_readl(host, DDR_REG); + if (ios->timing == MMC_TIMING_MMC_HS400) + val |= SDMMC_DDR_HS400; + else + val &= ~SDMMC_DDR_HS400; + mci_writel(host, DDR_REG, val); + + if (ios->timing == MMC_TIMING_MMC_HS || + ios->timing == MMC_TIMING_LEGACY) + clk_set_phase(priv->drive_clk, 180); + else if (ios->timing == MMC_TIMING_MMC_HS200) + clk_set_phase(priv->drive_clk, 135); +} + +static int dw_mci_hi3798cv200_execute_tuning(struct dw_mci_slot *slot, + u32 opcode) +{ + int degrees[] = { 0, 45, 90, 135, 180, 225, 270, 315 }; + struct dw_mci *host = slot->host; + struct hi3798cv200_priv *priv = host->priv; + int raise_point = -1, fall_point = -1; + int err, prev_err = -1; + int found = 0; + int i; + + for (i = 0; i < ARRAY_SIZE(degrees); i++) { + clk_set_phase(priv->sample_clk, degrees[i]); + mci_writel(host, RINTSTS, ALL_INT_CLR); + + err = mmc_send_tuning(slot->mmc, opcode, NULL); + if (!err) + found = 1; + + if (i > 0) { + if (err && !prev_err) + fall_point = i - 1; + if (!err && prev_err) + raise_point = i; + } + + if (raise_point != -1 && fall_point != -1) + goto tuning_out; + + prev_err = err; + err = 0; + } + +tuning_out: + if (found) { + if (raise_point == -1) + raise_point = 0; + if (fall_point == -1) + fall_point = ARRAY_SIZE(degrees) - 1; + if (fall_point < raise_point) { + if ((raise_point + fall_point) > + (ARRAY_SIZE(degrees) - 1)) + i = fall_point / 2; + else + i = (raise_point + ARRAY_SIZE(degrees) - 1) / 2; + } else { + i = (raise_point + fall_point) / 2; + } + + clk_set_phase(priv->sample_clk, degrees[i]); + dev_dbg(host->dev, "Tuning clk_sample[%d, %d], set[%d]\n", + raise_point, fall_point, degrees[i]); + } else { + dev_err(host->dev, "No valid clk_sample shift! use default\n"); + err = -EINVAL; + } + + mci_writel(host, RINTSTS, ALL_INT_CLR); + return err; +} + +static int dw_mci_hi3798cv200_init(struct dw_mci *host) +{ + struct hi3798cv200_priv *priv; + int ret; + + priv = devm_kzalloc(host->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->sample_clk = devm_clk_get(host->dev, "ciu-sample"); + if (IS_ERR(priv->sample_clk)) { + dev_err(host->dev, "failed to get ciu-sample clock\n"); + return PTR_ERR(priv->sample_clk); + } + + priv->drive_clk = devm_clk_get(host->dev, "ciu-drive"); + if (IS_ERR(priv->drive_clk)) { + dev_err(host->dev, "failed to get ciu-drive clock\n"); + return PTR_ERR(priv->drive_clk); + } + + ret = clk_prepare_enable(priv->sample_clk); + if (ret) { + dev_err(host->dev, "failed to enable ciu-sample clock\n"); + return ret; + } + + ret = clk_prepare_enable(priv->drive_clk); + if (ret) { + dev_err(host->dev, "failed to enable ciu-drive clock\n"); + goto disable_sample_clk; + } + + host->priv = priv; + return 0; + +disable_sample_clk: + clk_disable_unprepare(priv->sample_clk); + return ret; +} + +static const struct dw_mci_drv_data hi3798cv200_data = { + .init = dw_mci_hi3798cv200_init, + .set_ios = dw_mci_hi3798cv200_set_ios, + .execute_tuning = dw_mci_hi3798cv200_execute_tuning, +}; + +static int dw_mci_hi3798cv200_probe(struct platform_device *pdev) +{ + return dw_mci_pltfm_register(pdev, &hi3798cv200_data); +} + +static const struct of_device_id dw_mci_hi3798cv200_match[] = { + { .compatible = "hisilicon,hi3798cv200-dw-mshc", }, + {}, +}; + +MODULE_DEVICE_TABLE(of, dw_mci_hi3798cv200_match); +static struct platform_driver dw_mci_hi3798cv200_driver = { + .probe = dw_mci_hi3798cv200_probe, + .remove = dw_mci_pltfm_remove, + .driver = { + .name = "dwmmc_hi3798cv200", + .of_match_table = dw_mci_hi3798cv200_match, + }, +}; +module_platform_driver(dw_mci_hi3798cv200_driver); + +MODULE_DESCRIPTION("HiSilicon Hi3798CV200 Specific DW-MSHC Driver Extension"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:dwmmc_hi3798cv200");