From patchwork Wed Sep 6 11:45:55 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kishon Vijay Abraham I X-Patchwork-Id: 9940469 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 BA5E46035F for ; Wed, 6 Sep 2017 11:48:04 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B90BF28B8B for ; Wed, 6 Sep 2017 11:48:04 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id ABA6428BA9; Wed, 6 Sep 2017 11:48:04 +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 0C94928B8B for ; Wed, 6 Sep 2017 11:48:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753594AbdIFLsA (ORCPT ); Wed, 6 Sep 2017 07:48:00 -0400 Received: from fllnx210.ext.ti.com ([198.47.19.17]:45758 "EHLO fllnx210.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753251AbdIFLrT (ORCPT ); Wed, 6 Sep 2017 07:47:19 -0400 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by fllnx210.ext.ti.com (8.15.1/8.15.1) with ESMTP id v86BkK3v006546; Wed, 6 Sep 2017 06:46:20 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ti.com; s=ti-com-17Q1; t=1504698380; bh=ZxUU3uEePXJM8vc7/8ov/TqmZsMry+EyfRsXrxaZU2Q=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=BAwgS2AhO3IZZZyxBQu2HWL6jRQZm54eCk31XbrL5oJz53mqsp5c32REN2xos+IO2 /iMYVIi0P07gSc3givbXA0lWTqZwQRRhniq9+EtGeFtEYpUouPBvotW3uEpQciEhBp XHKdQCCF3qDY0nJwrluKdPDxmle+MaQ3E2tIPKaw= Received: from DLEE114.ent.ti.com (dlee114.ent.ti.com [157.170.170.25]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id v86BkKXP007140; Wed, 6 Sep 2017 06:46:20 -0500 Received: from DLEE112.ent.ti.com (157.170.170.23) by DLEE114.ent.ti.com (157.170.170.25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P256) id 15.1.845.34; Wed, 6 Sep 2017 06:46:20 -0500 Received: from dlep33.itg.ti.com (157.170.170.75) by DLEE112.ent.ti.com (157.170.170.23) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_RSA_WITH_AES_256_CBC_SHA) id 15.1.845.34 via Frontend Transport; Wed, 6 Sep 2017 06:46:20 -0500 Received: from a0393678ub.india.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep33.itg.ti.com (8.14.3/8.13.8) with ESMTP id v86Bk6DX005946; Wed, 6 Sep 2017 06:46:15 -0500 From: Kishon Vijay Abraham I To: Ulf Hansson , Adrian Hunter , Rob Herring , Mark Rutland , Tony Lindgren , Liam Girdwood , Mark Brown CC: Sekhar Nori , Russell King , Ravikumar Kattekola , , , , , , Subject: [PATCH v3 2/3] mmc: sdhci-omap: Add OMAP SDHCI driver Date: Wed, 6 Sep 2017 17:15:55 +0530 Message-ID: <20170906114556.32532-3-kishon@ti.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170906114556.32532-1-kishon@ti.com> References: <20170906114556.32532-1-kishon@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 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 Create a new sdhci-omap driver to configure the eMMC/SD/SDIO controller in TI's OMAP SoCs making use of the SDHCI core library. For OMAP specific configurations, populate sdhci_ops with OMAP specific callbacks and use SDHCI quirks. Enable only high speed mode for both SD and eMMC here and add other UHS mode support later. Signed-off-by: Kishon Vijay Abraham I Acked-by: Adrian Hunter --- drivers/mmc/host/Kconfig | 12 + drivers/mmc/host/Makefile | 1 + drivers/mmc/host/sdhci-omap.c | 607 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 620 insertions(+) create mode 100644 drivers/mmc/host/sdhci-omap.c diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig index 02179ed2a40d..03178c42efbb 100644 --- a/drivers/mmc/host/Kconfig +++ b/drivers/mmc/host/Kconfig @@ -899,3 +899,15 @@ config MMC_SDHCI_XENON This selects Marvell Xenon eMMC/SD/SDIO SDHCI. If you have a controller with this interface, say Y or M here. If unsure, say N. + +config MMC_SDHCI_OMAP + tristate "TI SDHCI Controller Support" + depends on MMC_SDHCI_PLTFM && OF + help + This selects the Secure Digital Host Controller Interface (SDHCI) + support present in TI's DRA7 SOCs. The controller supports + SD/MMC/SDIO devices. + + If you have a controller with this interface, say Y or M here. + + If unsure, say N. diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile index 303f5cd46cd9..2b5a8133948d 100644 --- a/drivers/mmc/host/Makefile +++ b/drivers/mmc/host/Makefile @@ -89,6 +89,7 @@ obj-$(CONFIG_MMC_SDHCI_MSM) += sdhci-msm.o obj-$(CONFIG_MMC_SDHCI_ST) += sdhci-st.o obj-$(CONFIG_MMC_SDHCI_MICROCHIP_PIC32) += sdhci-pic32.o obj-$(CONFIG_MMC_SDHCI_BRCMSTB) += sdhci-brcmstb.o +obj-$(CONFIG_MMC_SDHCI_OMAP) += sdhci-omap.o ifeq ($(CONFIG_CB710_DEBUG),y) CFLAGS-cb710-mmc += -DDEBUG diff --git a/drivers/mmc/host/sdhci-omap.c b/drivers/mmc/host/sdhci-omap.c new file mode 100644 index 000000000000..5ddae39816b7 --- /dev/null +++ b/drivers/mmc/host/sdhci-omap.c @@ -0,0 +1,607 @@ +/** + * SDHCI Controller driver for TI's OMAP SoCs + * + * Copyright (C) 2017 Texas Instruments + * Author: Kishon Vijay Abraham I + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 of + * the License as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "sdhci-pltfm.h" + +#define SDHCI_OMAP_CON 0x12c +#define CON_DW8 BIT(5) +#define CON_DMA_MASTER BIT(20) +#define CON_INIT BIT(1) +#define CON_OD BIT(0) + +#define SDHCI_OMAP_CMD 0x20c + +#define SDHCI_OMAP_HCTL 0x228 +#define HCTL_SDBP BIT(8) +#define HCTL_SDVS_SHIFT 9 +#define HCTL_SDVS_MASK (0x7 << HCTL_SDVS_SHIFT) +#define HCTL_SDVS_33 (0x7 << HCTL_SDVS_SHIFT) +#define HCTL_SDVS_30 (0x6 << HCTL_SDVS_SHIFT) +#define HCTL_SDVS_18 (0x5 << HCTL_SDVS_SHIFT) + +#define SDHCI_OMAP_SYSCTL 0x22c +#define SYSCTL_CEN BIT(2) +#define SYSCTL_CLKD_SHIFT 6 +#define SYSCTL_CLKD_MASK 0x3ff + +#define SDHCI_OMAP_STAT 0x230 + +#define SDHCI_OMAP_IE 0x234 +#define INT_CC_EN BIT(0) + +#define SDHCI_OMAP_AC12 0x23c +#define AC12_V1V8_SIGEN BIT(19) + +#define SDHCI_OMAP_CAPA 0x240 +#define CAPA_VS33 BIT(24) +#define CAPA_VS30 BIT(25) +#define CAPA_VS18 BIT(26) + +#define SDHCI_OMAP_TIMEOUT 1 /* 1 msec */ + +#define SYSCTL_CLKD_MAX 0x3FF + +#define IOV_1V8 1800000 /* 180000 uV */ +#define IOV_3V0 3000000 /* 300000 uV */ +#define IOV_3V3 3300000 /* 330000 uV */ + +struct sdhci_omap_data { + u32 offset; +}; + +struct sdhci_omap_host { + void __iomem *base; + struct device *dev; + struct regulator *pbias; + bool pbias_enabled; + struct sdhci_host *host; + u8 bus_mode; + u8 power_mode; +}; + +static inline u32 sdhci_omap_readl(struct sdhci_omap_host *host, + unsigned int offset) +{ + return readl(host->base + offset); +} + +static inline void sdhci_omap_writel(struct sdhci_omap_host *host, + unsigned int offset, u32 data) +{ + writel(data, host->base + offset); +} + +static int sdhci_omap_set_pbias(struct sdhci_omap_host *omap_host, + bool power_on, unsigned int iov) +{ + int ret; + struct device *dev = omap_host->dev; + + if (IS_ERR(omap_host->pbias)) + return 0; + + if (power_on) { + ret = regulator_set_voltage(omap_host->pbias, iov, iov); + if (ret) { + dev_err(dev, "pbias set voltage failed\n"); + return ret; + } + + if (omap_host->pbias_enabled) + return 0; + + ret = regulator_enable(omap_host->pbias); + if (ret) { + dev_err(dev, "pbias reg enable fail\n"); + return ret; + } + + omap_host->pbias_enabled = true; + } else { + if (!omap_host->pbias_enabled) + return 0; + + ret = regulator_disable(omap_host->pbias); + if (ret) { + dev_err(dev, "pbias reg disable fail\n"); + return ret; + } + omap_host->pbias_enabled = false; + } + + return 0; +} + +static int sdhci_omap_enable_iov(struct sdhci_omap_host *omap_host, + unsigned int iov) +{ + int ret; + struct sdhci_host *host = omap_host->host; + struct mmc_host *mmc = host->mmc; + + ret = sdhci_omap_set_pbias(omap_host, false, 0); + if (ret) + return ret; + + if (!IS_ERR(mmc->supply.vqmmc)) { + ret = regulator_set_voltage(mmc->supply.vqmmc, iov, iov); + if (ret) { + dev_err(mmc_dev(mmc), "vqmmc set voltage failed\n"); + return ret; + } + } + + ret = sdhci_omap_set_pbias(omap_host, true, iov); + if (ret) + return ret; + + return 0; +} + +static void sdhci_omap_conf_bus_power(struct sdhci_omap_host *omap_host, + unsigned char signal_voltage) +{ + u32 reg; + ktime_t timeout; + + reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_HCTL); + reg &= ~HCTL_SDVS_MASK; + + if (signal_voltage == MMC_SIGNAL_VOLTAGE_330) + reg |= HCTL_SDVS_33; + else + reg |= HCTL_SDVS_18; + + sdhci_omap_writel(omap_host, SDHCI_OMAP_HCTL, reg); + + reg |= HCTL_SDBP; + sdhci_omap_writel(omap_host, SDHCI_OMAP_HCTL, reg); + + /* wait 1ms */ + timeout = ktime_add_ms(ktime_get(), SDHCI_OMAP_TIMEOUT); + while (!(sdhci_omap_readl(omap_host, SDHCI_OMAP_HCTL) & HCTL_SDBP)) { + if (WARN_ON(ktime_after(ktime_get(), timeout))) + return; + usleep_range(5, 10); + } +} + +static int sdhci_omap_start_signal_voltage_switch(struct mmc_host *mmc, + struct mmc_ios *ios) +{ + u32 reg; + int ret; + unsigned int iov; + struct sdhci_host *host = mmc_priv(mmc); + struct sdhci_pltfm_host *pltfm_host; + struct sdhci_omap_host *omap_host; + struct device *dev; + + pltfm_host = sdhci_priv(host); + omap_host = sdhci_pltfm_priv(pltfm_host); + dev = omap_host->dev; + + if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) { + reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA); + if (!(reg & CAPA_VS33)) + return -EOPNOTSUPP; + + sdhci_omap_conf_bus_power(omap_host, ios->signal_voltage); + + reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); + reg &= ~AC12_V1V8_SIGEN; + sdhci_omap_writel(omap_host, SDHCI_OMAP_AC12, reg); + + iov = IOV_3V3; + } else if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180) { + reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA); + if (!(reg & CAPA_VS18)) + return -EOPNOTSUPP; + + sdhci_omap_conf_bus_power(omap_host, ios->signal_voltage); + + reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_AC12); + reg |= AC12_V1V8_SIGEN; + sdhci_omap_writel(omap_host, SDHCI_OMAP_AC12, reg); + + iov = IOV_1V8; + } else { + return -EOPNOTSUPP; + } + + ret = sdhci_omap_enable_iov(omap_host, iov); + if (ret) { + dev_err(dev, "failed to switch IO voltage to %dmV\n", iov); + return ret; + } + + dev_dbg(dev, "IO voltage switched to %dmV\n", iov); + return 0; +} + +static void sdhci_omap_set_bus_mode(struct sdhci_omap_host *omap_host, + unsigned int mode) +{ + u32 reg; + + if (omap_host->bus_mode == mode) + return; + + reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); + if (mode == MMC_BUSMODE_OPENDRAIN) + reg |= CON_OD; + else + reg &= ~CON_OD; + sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); + + omap_host->bus_mode = mode; +} + +void sdhci_omap_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) +{ + struct sdhci_host *host = mmc_priv(mmc); + struct sdhci_pltfm_host *pltfm_host; + struct sdhci_omap_host *omap_host; + + pltfm_host = sdhci_priv(host); + omap_host = sdhci_pltfm_priv(pltfm_host); + + sdhci_omap_set_bus_mode(omap_host, ios->bus_mode); + sdhci_set_ios(mmc, ios); +} + +static u16 sdhci_omap_calc_divisor(struct sdhci_pltfm_host *host, + unsigned int clock) +{ + u16 dsor; + + dsor = DIV_ROUND_UP(clk_get_rate(host->clk), clock); + if (dsor > SYSCTL_CLKD_MAX) + dsor = SYSCTL_CLKD_MAX; + + return dsor; +} + +static void sdhci_omap_start_clock(struct sdhci_omap_host *omap_host) +{ + u32 reg; + + reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_SYSCTL); + reg |= SYSCTL_CEN; + sdhci_omap_writel(omap_host, SDHCI_OMAP_SYSCTL, reg); +} + +static void sdhci_omap_stop_clock(struct sdhci_omap_host *omap_host) +{ + u32 reg; + + reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_SYSCTL); + reg &= ~SYSCTL_CEN; + sdhci_omap_writel(omap_host, SDHCI_OMAP_SYSCTL, reg); +} + +static void sdhci_omap_set_clock(struct sdhci_host *host, unsigned int clock) +{ + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); + unsigned long clkdiv; + + sdhci_omap_stop_clock(omap_host); + + if (!clock) + return; + + clkdiv = sdhci_omap_calc_divisor(pltfm_host, clock); + clkdiv = (clkdiv & SYSCTL_CLKD_MASK) << SYSCTL_CLKD_SHIFT; + sdhci_enable_clk(host, clkdiv); + + sdhci_omap_start_clock(omap_host); +} + +void sdhci_omap_set_power(struct sdhci_host *host, unsigned char mode, + unsigned short vdd) +{ + struct mmc_host *mmc = host->mmc; + + mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd); +} + +static int sdhci_omap_enable_dma(struct sdhci_host *host) +{ + u32 reg; + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); + + reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); + reg |= CON_DMA_MASTER; + sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); + + return 0; +} + +unsigned int sdhci_omap_get_min_clock(struct sdhci_host *host) +{ + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + + return clk_get_rate(pltfm_host->clk) / SYSCTL_CLKD_MAX; +} + +static void sdhci_omap_set_bus_width(struct sdhci_host *host, int width) +{ + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); + u32 reg; + + reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); + if (width == MMC_BUS_WIDTH_8) + reg |= CON_DW8; + else + reg &= ~CON_DW8; + sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); + + sdhci_set_bus_width(host, width); +} + +static void sdhci_omap_init_74_clocks(struct sdhci_host *host, u8 power_mode) +{ + u32 reg; + ktime_t timeout; + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); + + if (omap_host->power_mode == power_mode) + return; + + if (power_mode != MMC_POWER_ON) + return; + + disable_irq(host->irq); + + reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); + reg |= CON_INIT; + sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); + sdhci_omap_writel(omap_host, SDHCI_OMAP_CMD, 0x0); + + /* wait 1ms */ + timeout = ktime_add_ms(ktime_get(), SDHCI_OMAP_TIMEOUT); + while (!(sdhci_omap_readl(omap_host, SDHCI_OMAP_STAT) & INT_CC_EN)) { + if (WARN_ON(ktime_after(ktime_get(), timeout))) + return; + usleep_range(5, 10); + } + + reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); + reg &= ~CON_INIT; + sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, reg); + sdhci_omap_writel(omap_host, SDHCI_OMAP_STAT, INT_CC_EN); + + enable_irq(host->irq); + + omap_host->power_mode = power_mode; +} + +static struct sdhci_ops sdhci_omap_ops = { + .set_clock = sdhci_omap_set_clock, + .set_power = sdhci_omap_set_power, + .enable_dma = sdhci_omap_enable_dma, + .get_max_clock = sdhci_pltfm_clk_get_max_clock, + .get_min_clock = sdhci_omap_get_min_clock, + .set_bus_width = sdhci_omap_set_bus_width, + .platform_send_init_74_clocks = sdhci_omap_init_74_clocks, + .reset = sdhci_reset, + .set_uhs_signaling = sdhci_set_uhs_signaling, +}; + +static int sdhci_omap_set_capabilities(struct sdhci_omap_host *omap_host) +{ + u32 reg; + int ret = 0; + struct device *dev = omap_host->dev; + struct regulator *vqmmc; + + vqmmc = regulator_get(dev, "vqmmc"); + if (IS_ERR(vqmmc)) { + ret = PTR_ERR(vqmmc); + goto reg_put; + } + + /* voltage capabilities might be set by boot loader, clear it */ + reg = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA); + reg &= ~(CAPA_VS18 | CAPA_VS30 | CAPA_VS33); + + if (regulator_is_supported_voltage(vqmmc, IOV_3V3, IOV_3V3)) + reg |= CAPA_VS33; + if (regulator_is_supported_voltage(vqmmc, IOV_1V8, IOV_1V8)) + reg |= CAPA_VS18; + + sdhci_omap_writel(omap_host, SDHCI_OMAP_CAPA, reg); + +reg_put: + regulator_put(vqmmc); + + return ret; +} + +static const struct sdhci_pltfm_data sdhci_omap_pdata = { + .quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION | + SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK | + SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN | + SDHCI_QUIRK_NO_HISPD_BIT | + SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC, + .quirks2 = SDHCI_QUIRK2_NO_1_8_V | + SDHCI_QUIRK2_ACMD23_BROKEN | + SDHCI_QUIRK2_RSP_136_HAS_CRC, + .ops = &sdhci_omap_ops, +}; + +static const struct sdhci_omap_data dra7_data = { + .offset = 0x200, +}; + +static const struct of_device_id omap_sdhci_match[] = { + { .compatible = "ti,dra7-sdhci", .data = &dra7_data }, + {}, +}; +MODULE_DEVICE_TABLE(of, omap_sdhci_match); + +static int sdhci_omap_probe(struct platform_device *pdev) +{ + int ret; + u32 offset; + struct device *dev = &pdev->dev; + struct sdhci_host *host; + struct sdhci_pltfm_host *pltfm_host; + struct sdhci_omap_host *omap_host; + struct mmc_host *mmc; + const struct of_device_id *match; + struct sdhci_omap_data *data; + + match = of_match_device(omap_sdhci_match, dev); + if (!match) + return -EINVAL; + + data = (struct sdhci_omap_data *)match->data; + if (!data) { + dev_err(dev, "no sdhci omap data\n"); + return -EINVAL; + } + offset = data->offset; + + host = sdhci_pltfm_init(pdev, &sdhci_omap_pdata, + sizeof(*omap_host)); + if (IS_ERR(host)) { + dev_err(dev, "Failed sdhci_pltfm_init\n"); + return PTR_ERR(host); + } + + pltfm_host = sdhci_priv(host); + omap_host = sdhci_pltfm_priv(pltfm_host); + omap_host->host = host; + omap_host->base = host->ioaddr; + omap_host->dev = dev; + host->ioaddr += offset; + + mmc = host->mmc; + ret = mmc_of_parse(mmc); + if (ret) + goto err_pltfm_free; + + pltfm_host->clk = devm_clk_get(dev, "fck"); + if (IS_ERR(pltfm_host->clk)) { + ret = PTR_ERR(pltfm_host->clk); + goto err_pltfm_free; + } + + ret = clk_set_rate(pltfm_host->clk, mmc->f_max); + if (ret) { + dev_err(dev, "failed to set clock to %d\n", mmc->f_max); + goto err_pltfm_free; + } + + omap_host->pbias = devm_regulator_get_optional(dev, "pbias"); + if (IS_ERR(omap_host->pbias)) { + ret = PTR_ERR(omap_host->pbias); + if (ret != -ENODEV) + goto err_pltfm_free; + dev_dbg(dev, "unable to get pbias regulator %d\n", ret); + } + omap_host->pbias_enabled = false; + + /* + * omap_device_pm_domain has callbacks to enable the main + * functional clock, interface clock and also configure the + * SYSCONFIG register of omap devices. The callback will be invoked + * as part of pm_runtime_get_sync. + */ + pm_runtime_enable(dev); + ret = pm_runtime_get_sync(dev); + if (ret < 0) { + dev_err(dev, "pm_runtime_get_sync failed\n"); + pm_runtime_put_noidle(dev); + goto err_rpm_disable; + } + + ret = sdhci_omap_set_capabilities(omap_host); + if (ret) { + dev_err(dev, "failed to set system capabilities\n"); + goto err_put_sync; + } + + host->mmc_host_ops.get_ro = mmc_gpio_get_ro; + host->mmc_host_ops.start_signal_voltage_switch = + sdhci_omap_start_signal_voltage_switch; + host->mmc_host_ops.set_ios = sdhci_omap_set_ios; + + sdhci_read_caps(host); + host->caps |= SDHCI_CAN_DO_ADMA2; + + ret = sdhci_add_host(host); + if (ret) + goto err_put_sync; + + return 0; + +err_put_sync: + pm_runtime_put_sync(dev); + +err_rpm_disable: + pm_runtime_disable(dev); + +err_pltfm_free: + sdhci_pltfm_free(pdev); + return ret; +} + +static int sdhci_omap_remove(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct sdhci_host *host = platform_get_drvdata(pdev); + + sdhci_remove_host(host, true); + pm_runtime_put_sync(dev); + pm_runtime_disable(dev); + sdhci_pltfm_free(pdev); + + return 0; +} + +static struct platform_driver sdhci_omap_driver = { + .probe = sdhci_omap_probe, + .remove = sdhci_omap_remove, + .driver = { + .name = "sdhci-omap", + .of_match_table = omap_sdhci_match, + }, +}; + +module_platform_driver(sdhci_omap_driver); + +MODULE_DESCRIPTION("SDHCI driver for OMAP SoCs"); +MODULE_AUTHOR("Texas Instruments Inc."); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:sdhci_omap");