From patchwork Fri Sep 27 16:57:21 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Georgi Djakov X-Patchwork-Id: 2956231 Return-Path: X-Original-To: patchwork-linux-arm-msm@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 9AFB49F244 for ; Fri, 27 Sep 2013 16:57:35 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 0E8FD20272 for ; Fri, 27 Sep 2013 16:57:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2873320274 for ; Fri, 27 Sep 2013 16:57:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754242Ab3I0Q5Y (ORCPT ); Fri, 27 Sep 2013 12:57:24 -0400 Received: from ns.mm-sol.com ([212.124.72.66]:33392 "EHLO extserv.mm-sol.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753004Ab3I0Q5T (ORCPT ); Fri, 27 Sep 2013 12:57:19 -0400 Received: from mms.int.mm-sol.com (unknown [172.18.0.3]) by extserv.mm-sol.com (Postfix) with ESMTPSA id 36178C6CA; Fri, 27 Sep 2013 19:57:18 +0300 (EEST) From: Georgi Djakov To: linux-mmc@vger.kernel.org Cc: cjb@laptop.org, grant.likely@linaro.org, rob.herring@calxeda.com, devicetree@vger.kernel.org, mark.rutland@arm.com, swarren@wwwdotorg.org, ian.campbell@citrix.com, rob@landley.net, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, Georgi Djakov , Asutosh Das , Venkat Gopalakrishnan , Sahitya Tummala , Subhash Jadavani Subject: [PATCH v6 2/2] mmc: sdhci-msm: Initial support for MSM chipsets Date: Fri, 27 Sep 2013 19:57:21 +0300 Message-Id: <1380301041-26405-3-git-send-email-gdjakov@mm-sol.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1380301041-26405-1-git-send-email-gdjakov@mm-sol.com> References: <1380301041-26405-1-git-send-email-gdjakov@mm-sol.com> Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org X-Spam-Status: No, score=-5.9 required=5.0 tests=BAYES_00,KHOP_BIG_TO_CC, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable 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 This platform driver adds the initial support of Secure Digital Host Controller Interface compliant controller found in Qualcomm MSM chipsets. CC: Asutosh Das CC: Venkat Gopalakrishnan CC: Sahitya Tummala CC: Subhash Jadavani Signed-off-by: Georgi Djakov --- drivers/mmc/host/Kconfig | 13 + drivers/mmc/host/Makefile | 1 + drivers/mmc/host/sdhci-msm.c | 644 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 658 insertions(+) create mode 100644 drivers/mmc/host/sdhci-msm.c diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig index 8a4c066..2b31471 100644 --- a/drivers/mmc/host/Kconfig +++ b/drivers/mmc/host/Kconfig @@ -322,6 +322,19 @@ config MMC_ATMELMCI If unsure, say N. +config MMC_SDHCI_MSM + tristate "Qualcomm SDHCI Controller Support" + depends on ARCH_MSM + depends on MMC_SDHCI_PLTFM + help + This selects the Secure Digital Host Controller Interface (SDHCI) + support present in MSM SOCs from Qualcomm. The controller + supports SD/MMC/SDIO devices. + + If you have a controller with this interface, say Y or M here. + + If unsure, say N. + config MMC_MSM tristate "Qualcomm SDCC Controller Support" depends on MMC && ARCH_MSM diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile index d422e21..efd6e6a 100644 --- a/drivers/mmc/host/Makefile +++ b/drivers/mmc/host/Makefile @@ -63,6 +63,7 @@ obj-$(CONFIG_MMC_SDHCI_OF_ESDHC) += sdhci-of-esdhc.o obj-$(CONFIG_MMC_SDHCI_OF_HLWD) += sdhci-of-hlwd.o obj-$(CONFIG_MMC_SDHCI_BCM_KONA) += sdhci-bcm-kona.o obj-$(CONFIG_MMC_SDHCI_BCM2835) += sdhci-bcm2835.o +obj-$(CONFIG_MMC_SDHCI_MSM) += sdhci-msm.o ifeq ($(CONFIG_CB710_DEBUG),y) CFLAGS-cb710-mmc += -DDEBUG diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c new file mode 100644 index 0000000..55cb62f --- /dev/null +++ b/drivers/mmc/host/sdhci-msm.c @@ -0,0 +1,644 @@ +/* + * drivers/mmc/host/sdhci-msm.c - Qualcomm MSM SDHCI Platform + * driver source file + * + * Copyright (c) 2013, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 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. + * + */ + +#include +#include +#include +#include +#include + +#include "sdhci-pltfm.h" + +#define CORE_HC_MODE 0x78 +#define HC_MODE_EN 0x1 + +#define CORE_POWER 0x0 +#define CORE_SW_RST (1 << 7) + +#define CORE_PWRCTL_STATUS 0xdc +#define CORE_PWRCTL_MASK 0xe0 +#define CORE_PWRCTL_CLEAR 0xe4 +#define CORE_PWRCTL_CTL 0xe8 + +#define CORE_PWRCTL_BUS_OFF 0x01 +#define CORE_PWRCTL_BUS_ON (1 << 1) +#define CORE_PWRCTL_IO_LOW (1 << 2) +#define CORE_PWRCTL_IO_HIGH (1 << 3) + +#define CORE_PWRCTL_BUS_SUCCESS 0x01 +#define CORE_PWRCTL_BUS_FAIL (1 << 1) +#define CORE_PWRCTL_IO_SUCCESS (1 << 2) +#define CORE_PWRCTL_IO_FAIL (1 << 3) + +#define INT_MASK 0xf + +/* This structure keeps information per regulator */ +struct sdhci_msm_reg_data { + struct regulator *reg; + const char *name; + /* voltage level to be set */ + u32 low_vol_level; + u32 high_vol_level; + /* Load values for low power and high power mode */ + u32 lpm_uA; + u32 hpm_uA; + + /* is this regulator needs to be always on? */ + bool is_always_on; + /* is low power mode setting required for this regulator? */ + bool lpm_sup; +}; + +struct sdhci_msm_pltfm_data { + u32 caps; /* Supported UHS-I Modes */ + u32 caps2; /* More capabilities */ + struct sdhci_msm_reg_data vdd; /* VDD/VCC regulator info */ + struct sdhci_msm_reg_data vdd_io; /* VDD IO regulator info */ +}; + +struct sdhci_msm_host { + struct platform_device *pdev; + void __iomem *core_mem; /* MSM SDCC mapped address */ + int pwr_irq; /* power irq */ + struct clk *clk; /* main SD/MMC bus clock */ + struct clk *pclk; /* SDHC peripheral bus clock */ + struct clk *bus_clk; /* SDHC bus voter clock */ + struct sdhci_msm_pltfm_data pdata; + struct mmc_host *mmc; + struct sdhci_pltfm_data sdhci_msm_pdata; +}; + +enum vdd_io_level { + /* set vdd_io->low_vol_level */ + VDD_IO_LOW, + /* set vdd_io->high_vol_level */ + VDD_IO_HIGH, + /* + * set whatever there in voltage_level (third argument) of + * sdhci_msm_set_vdd_io_vol() function. + */ + VDD_IO_SET_LEVEL, +}; + +#define MAX_PROP_SIZE 32 +static int sdhci_msm_dt_parse_vreg_info(struct device *dev, + struct sdhci_msm_reg_data *vreg, + const char *vreg_name) +{ + int len; + const __be32 *prop; + char prop_name[MAX_PROP_SIZE]; + struct device_node *np = dev->of_node; + + snprintf(prop_name, MAX_PROP_SIZE, "%s-supply", vreg_name); + if (!of_parse_phandle(np, prop_name, 0)) { + dev_info(dev, "No vreg data found for %s\n", vreg_name); + return -EINVAL; + } + + vreg->name = vreg_name; + + snprintf(prop_name, MAX_PROP_SIZE, "qcom,%s-always-on", vreg_name); + if (of_get_property(np, prop_name, NULL)) + vreg->is_always_on = true; + + snprintf(prop_name, MAX_PROP_SIZE, "qcom,%s-lpm-sup", vreg_name); + if (of_get_property(np, prop_name, NULL)) + vreg->lpm_sup = true; + + snprintf(prop_name, MAX_PROP_SIZE, "qcom,%s-voltage-level", vreg_name); + prop = of_get_property(np, prop_name, &len); + if (!prop || (len != (2 * sizeof(__be32)))) { + dev_warn(dev, "%s %s property\n", + prop ? "invalid format" : "no", prop_name); + } else { + vreg->low_vol_level = be32_to_cpup(&prop[0]); + vreg->high_vol_level = be32_to_cpup(&prop[1]); + } + + snprintf(prop_name, MAX_PROP_SIZE, "qcom,%s-current-level", vreg_name); + prop = of_get_property(np, prop_name, &len); + if (!prop || (len != (2 * sizeof(__be32)))) { + dev_warn(dev, "%s %s property\n", + prop ? "invalid format" : "no", prop_name); + } else { + vreg->lpm_uA = be32_to_cpup(&prop[0]); + vreg->hpm_uA = be32_to_cpup(&prop[1]); + } + + dev_dbg(dev, "%s: %s%svol=[%d %d]uV, curr=[%d %d]uA\n", + vreg->name, vreg->is_always_on ? "always_on, " : "", + vreg->lpm_sup ? "lpm_sup, " : "", vreg->low_vol_level, + vreg->high_vol_level, vreg->lpm_uA, vreg->hpm_uA); + + return 0; +} + +/* Parse devicetree data */ +static int sdhci_msm_populate_pdata(struct device *dev, + struct sdhci_msm_pltfm_data *pdata) +{ + struct device_node *np = dev->of_node; + int len, i; + + if (sdhci_msm_dt_parse_vreg_info(dev, &pdata->vdd, "vdd")) { + dev_err(dev, "failed parsing vdd data\n"); + return -EINVAL; + } + if (sdhci_msm_dt_parse_vreg_info(dev, &pdata->vdd_io, "vddio")) { + dev_err(dev, "failed parsing vddio data\n"); + return -EINVAL; + } + + len = of_property_count_strings(np, "qcom,bus-speed-mode"); + + for (i = 0; i < len; i++) { + const char *name = NULL; + + of_property_read_string_index(np, + "qcom,bus-speed-mode", i, &name); + if (!name) + continue; + + if (!strncmp(name, "HS200_1p8v", sizeof("HS200_1p8v"))) + pdata->caps2 |= MMC_CAP2_HS200_1_8V_SDR; + else if (!strncmp(name, "HS200_1p2v", sizeof("HS200_1p2v"))) + pdata->caps2 |= MMC_CAP2_HS200_1_2V_SDR; + else if (!strncmp(name, "DDR_1p8v", sizeof("DDR_1p8v"))) + pdata->caps |= MMC_CAP_1_8V_DDR | MMC_CAP_UHS_DDR50; + else if (!strncmp(name, "DDR_1p2v", sizeof("DDR_1p2v"))) + pdata->caps |= MMC_CAP_1_2V_DDR | MMC_CAP_UHS_DDR50; + } + + return 0; +} + +/* Regulator utility functions */ +static int sdhci_msm_vreg_init_reg(struct device *dev, + struct sdhci_msm_reg_data *vreg) +{ + vreg->reg = devm_regulator_get(dev, vreg->name); + if (IS_ERR(vreg->reg)) { + dev_err(dev, "devm_regulator_get(%s) failed. ret=%ld\n", + vreg->name, PTR_ERR(vreg->reg)); + return PTR_ERR(vreg->reg); + } + + /* sanity check */ + if (!vreg->high_vol_level || !vreg->hpm_uA + || !vreg->low_vol_level || !vreg->lpm_uA + || vreg->low_vol_level > vreg->high_vol_level + || vreg->lpm_uA > vreg->hpm_uA) { + dev_err(dev, "%s invalid constraints specified\n", vreg->name); + return -EINVAL; + } + + return 0; +} + +static int sdhci_msm_vreg_enable(struct device *dev, + struct sdhci_msm_reg_data *vreg) +{ + int ret; + + /* Put regulator in HPM (high power mode) */ + ret = regulator_set_optimum_mode(vreg->reg, vreg->hpm_uA); + if (ret < 0) { + dev_err(dev, "regulator_set_optimum_mode(%s,uA_load=%d) fail (%d)\n", + vreg->name, vreg->hpm_uA, ret); + return ret; + } + + if (!regulator_is_enabled(vreg->reg)) { + /* Set voltage level */ + ret = regulator_set_voltage(vreg->reg, vreg->high_vol_level, + vreg->high_vol_level); + if (ret) + return ret; + } + + ret = regulator_enable(vreg->reg); + if (ret) { + dev_err(dev, "regulator_enable(%s) fail (%d)\n", + vreg->name, ret); + return ret; + } + + return 0; +} + +static int sdhci_msm_vreg_disable(struct device *dev, + struct sdhci_msm_reg_data *vreg) +{ + int ret; + + if (!regulator_is_enabled(vreg->reg)) + return 0; + + /* Never disable regulator marked as always_on */ + if (vreg->is_always_on) { + if (vreg->lpm_sup) { + /* Put always_on regulator in LPM (low power mode) */ + ret = regulator_set_optimum_mode(vreg->reg, + vreg->lpm_uA); + if (ret < 0) + return ret; + } + } else { + ret = regulator_disable(vreg->reg); + if (ret) { + dev_err(dev, "regulator_disable(%s) fail (%d)\n", + vreg->name, ret); + return ret; + } + + ret = regulator_set_optimum_mode(vreg->reg, 0); + if (ret < 0) + return ret; + + /* Set min. voltage level to 0 */ + ret = regulator_set_voltage(vreg->reg, 0, vreg->high_vol_level); + if (ret) + return ret; + } + + return 0; +} + +static int sdhci_msm_setup_vreg(struct sdhci_msm_host *msm_host, bool enable) +{ + int ret, i; + struct sdhci_msm_reg_data *vreg_table[2]; + + vreg_table[0] = &msm_host->pdata.vdd; + vreg_table[1] = &msm_host->pdata.vdd_io; + + for (i = 0; i < ARRAY_SIZE(vreg_table); i++) { + if (!vreg_table[i]) + continue; + if (enable) + ret = sdhci_msm_vreg_enable(&msm_host->pdev->dev, + vreg_table[i]); + else + ret = sdhci_msm_vreg_disable(&msm_host->pdev->dev, + vreg_table[i]); + if (ret) + return ret; + } + + return 0; +} + +/* This init function should be called only once for each SDHC slot */ +static int sdhci_msm_vreg_init(struct device *dev, + struct sdhci_msm_pltfm_data *pdata) +{ + struct sdhci_msm_reg_data *curr_vdd_reg = &pdata->vdd; + struct sdhci_msm_reg_data *curr_vdd_io_reg = &pdata->vdd_io; + int ret; + + ret = sdhci_msm_vreg_init_reg(dev, curr_vdd_reg); + if (ret) + return ret; + + ret = sdhci_msm_vreg_init_reg(dev, curr_vdd_io_reg); + if (ret) + return ret; + + return 0; +} + +static int sdhci_msm_set_vdd_io_vol(struct sdhci_msm_pltfm_data *pdata, + enum vdd_io_level level, + unsigned int voltage_level) +{ + int set_level; + struct sdhci_msm_reg_data *vdd_io_reg = &pdata->vdd_io; + + if (!regulator_is_enabled(vdd_io_reg->reg)) + return 0; + + switch (level) { + case VDD_IO_LOW: + set_level = vdd_io_reg->low_vol_level; + break; + case VDD_IO_HIGH: + set_level = vdd_io_reg->high_vol_level; + break; + case VDD_IO_SET_LEVEL: + set_level = voltage_level; + break; + default: + pr_err("invalid vdd_io level = %d", level); + return -EINVAL; + } + + return regulator_set_voltage(vdd_io_reg->reg, set_level, set_level); +} + +static irqreturn_t sdhci_msm_pwr_irq(int irq, void *data) +{ + struct sdhci_msm_host *msm_host = (struct sdhci_msm_host *)data; + u8 irq_status; + u8 irq_ack = 0; + int ret = 0; + + irq_status = readb_relaxed(msm_host->core_mem + CORE_PWRCTL_STATUS); + dev_dbg(mmc_dev(msm_host->mmc), "%s: Received IRQ(%d), status=0x%x\n", + mmc_hostname(msm_host->mmc), irq, irq_status); + + /* Clear the interrupt */ + writeb_relaxed(irq_status, (msm_host->core_mem + CORE_PWRCTL_CLEAR)); + /* + * SDHC has core_mem and hc_mem device memory and these memory + * addresses do not fall within 1KB region. Hence, any update to + * core_mem address space would require an mb() to ensure this gets + * completed before its next update to registers within hc_mem. + */ + mb(); + + /* Handle BUS ON/OFF */ + if (irq_status & (CORE_PWRCTL_BUS_ON | CORE_PWRCTL_BUS_OFF)) { + bool flag = (irq_status & CORE_PWRCTL_BUS_ON) ? 1 : 0; + ret = sdhci_msm_setup_vreg(msm_host, flag); + if (ret) + irq_ack |= CORE_PWRCTL_BUS_FAIL; + else + irq_ack |= CORE_PWRCTL_BUS_SUCCESS; + } + /* Handle IO LOW/HIGH */ + if (irq_status & (CORE_PWRCTL_IO_LOW | CORE_PWRCTL_IO_HIGH)) { + /* Switch voltage */ + int io_status = (irq_status & CORE_PWRCTL_IO_LOW) ? + VDD_IO_LOW : VDD_IO_HIGH; + ret = sdhci_msm_set_vdd_io_vol(&msm_host->pdata, io_status, 0); + if (ret) + irq_ack |= CORE_PWRCTL_IO_FAIL; + else + irq_ack |= CORE_PWRCTL_IO_SUCCESS; + } + + /* ACK status to the core */ + writeb_relaxed(irq_ack, (msm_host->core_mem + CORE_PWRCTL_CTL)); + /* + * SDHC has core_mem and hc_mem device memory and these memory + * addresses do not fall within 1KB region. Hence, any update to + * core_mem address space would require an mb() to ensure this gets + * completed before its next update to registers within hc_mem. + */ + mb(); + + dev_dbg(mmc_dev(msm_host->mmc), "%s: Handled IRQ(%d), ret=%d, ack=0x%x\n", + mmc_hostname(msm_host->mmc), irq, ret, irq_ack); + return IRQ_HANDLED; +} + +/* This function returns the max. current supported by VDD rail in mA */ +static u32 sdhci_msm_get_vdd_max_current(struct sdhci_msm_host *host) +{ + return host->pdata.vdd.hpm_uA / 1000; +} + +static const struct of_device_id sdhci_msm_dt_match[] = { + {.compatible = "qcom,sdhci-msm"}, + {}, +}; + +MODULE_DEVICE_TABLE(of, sdhci_msm_dt_match); + +static int sdhci_msm_probe(struct platform_device *pdev) +{ + struct sdhci_host *host; + struct sdhci_pltfm_host *pltfm_host; + struct sdhci_msm_host *msm_host; + struct resource *core_memres = NULL; + int ret, dead; + struct pinctrl *pinctrl; + u16 host_version; + + if (!pdev->dev.of_node) { + dev_err(&pdev->dev, "No device tree data\n"); + return -ENOENT; + } + + msm_host = devm_kzalloc(&pdev->dev, sizeof(*msm_host), GFP_KERNEL); + if (!msm_host) + return -ENOMEM; + + host = sdhci_pltfm_init(pdev, &msm_host->sdhci_msm_pdata, 0); + if (IS_ERR(host)) { + dev_err(mmc_dev(host->mmc), "sdhci_pltfm_init error\n"); + return PTR_ERR(host); + } + + pltfm_host = sdhci_priv(host); + pltfm_host->priv = msm_host; + msm_host->mmc = host->mmc; + msm_host->pdev = pdev; + + ret = mmc_of_parse(host->mmc); + if (ret) { + dev_err(&pdev->dev, "failed parsing mmc device tree\n"); + goto pltfm_free; + } + + ret = sdhci_msm_populate_pdata(&pdev->dev, &msm_host->pdata); + if (ret) { + dev_err(&pdev->dev, "DT parsing error\n"); + goto pltfm_free; + } + + /* Setup pins */ + pinctrl = devm_pinctrl_get_select_default(&pdev->dev); + if (IS_ERR(pinctrl)) + dev_warn(&pdev->dev, "pins are not configured by the driver\n"); + + /* Setup SDCC bus voter clock. */ + msm_host->bus_clk = devm_clk_get(&pdev->dev, "bus"); + if (!IS_ERR(msm_host->bus_clk)) { + /* Vote for max. clk rate for max. performance */ + ret = clk_set_rate(msm_host->bus_clk, INT_MAX); + if (ret) + goto pltfm_free; + ret = clk_prepare_enable(msm_host->bus_clk); + if (ret) + goto pltfm_free; + } + + /* Setup main peripheral bus clock */ + msm_host->pclk = devm_clk_get(&pdev->dev, "iface"); + if (!IS_ERR(msm_host->pclk)) { + ret = clk_prepare_enable(msm_host->pclk); + if (ret) { + dev_err(&pdev->dev, + "Main peripheral clock setup failed (%d)\n", + ret); + goto bus_clk_disable; + } + } + + /* Setup SDC MMC clock */ + msm_host->clk = devm_clk_get(&pdev->dev, "core"); + if (IS_ERR(msm_host->clk)) { + ret = PTR_ERR(msm_host->clk); + dev_err(&pdev->dev, "SDC MMC clock setup failed (%d)\n", ret); + goto pclk_disable; + } + + ret = clk_prepare_enable(msm_host->clk); + if (ret) + goto pclk_disable; + + /* Setup regulators */ + ret = sdhci_msm_vreg_init(&pdev->dev, &msm_host->pdata); + if (ret) { + dev_err(&pdev->dev, "Regulator setup failed (%d)\n", ret); + goto clk_disable; + } + + core_memres = platform_get_resource_byname(pdev, + IORESOURCE_MEM, "core_mem"); + msm_host->core_mem = devm_ioremap_resource(&pdev->dev, core_memres); + + if (IS_ERR(msm_host->core_mem)) { + dev_err(&pdev->dev, "Failed to remap registers\n"); + ret = PTR_ERR(msm_host->core_mem); + goto vreg_disable; + } + + /* Reset the core and Enable SDHC mode */ + writel_relaxed(readl_relaxed(msm_host->core_mem + CORE_POWER) | + CORE_SW_RST, msm_host->core_mem + CORE_POWER); + + /* SW reset can take upto 10HCLK + 15MCLK cycles. (min 40us) */ + usleep_range(1000, 5000); + if (readl(msm_host->core_mem + CORE_POWER) & CORE_SW_RST) { + dev_err(&pdev->dev, "Stuck in reset\n"); + ret = -ETIMEDOUT; + goto vreg_disable; + } + + /* Set HC_MODE_EN bit in HC_MODE register */ + writel_relaxed(HC_MODE_EN, (msm_host->core_mem + CORE_HC_MODE)); + + /* + * Following are the deviations from SDHC spec v3.0 - + * 1. Card detection is handled using separate GPIO. + * 2. Bus power control is handled by interacting with PMIC. + */ + host->quirks |= SDHCI_QUIRK_BROKEN_CARD_DETECTION; + host->quirks |= SDHCI_QUIRK_SINGLE_POWER_WRITE; + + host_version = readw_relaxed((host->ioaddr + SDHCI_HOST_VERSION)); + dev_dbg(&pdev->dev, "Host Version: 0x%x Vendor Version 0x%x\n", + host_version, ((host_version & SDHCI_VENDOR_VER_MASK) >> + SDHCI_VENDOR_VER_SHIFT)); + + /* Setup PWRCTL irq */ + msm_host->pwr_irq = platform_get_irq_byname(pdev, "pwr_irq"); + if (msm_host->pwr_irq < 0) { + dev_err(&pdev->dev, "Failed to get pwr_irq by name (%d)\n", + msm_host->pwr_irq); + goto vreg_disable; + } + ret = devm_request_threaded_irq(&pdev->dev, msm_host->pwr_irq, NULL, + sdhci_msm_pwr_irq, IRQF_ONESHOT, + dev_name(&pdev->dev), host); + if (ret) { + dev_err(&pdev->dev, "Request threaded irq(%d) failed (%d)\n", + msm_host->pwr_irq, ret); + goto vreg_disable; + } + + /* Enable pwr irq interrupts */ + writel_relaxed(INT_MASK, (msm_host->core_mem + CORE_PWRCTL_MASK)); + + msm_host->mmc->caps |= msm_host->pdata.caps; + msm_host->mmc->caps2 |= msm_host->pdata.caps2; + + ret = sdhci_add_host(host); + if (ret) { + dev_err(&pdev->dev, "Add host failed (%d)\n", ret); + goto vreg_disable; + } + + ret = clk_set_rate(msm_host->clk, host->max_clk); + if (ret) { + dev_err(&pdev->dev, "MClk rate set failed (%d)\n", ret); + goto remove_host; + } + + host->mmc->max_current_180 = host->mmc->max_current_300 = + host->mmc->max_current_330 = sdhci_msm_get_vdd_max_current(msm_host); + + return 0; + +remove_host: + dead = (readl_relaxed(host->ioaddr + SDHCI_INT_STATUS) == 0xffffffff); + sdhci_remove_host(host, dead); +vreg_disable: + if (!IS_ERR(msm_host->pdata.vdd.reg)) + sdhci_msm_vreg_disable(&pdev->dev, &msm_host->pdata.vdd); + if (!IS_ERR(msm_host->pdata.vdd_io.reg)) + sdhci_msm_vreg_disable(&pdev->dev, &msm_host->pdata.vdd_io); +clk_disable: + if (!IS_ERR(msm_host->clk)) + clk_disable_unprepare(msm_host->clk); +pclk_disable: + if (!IS_ERR(msm_host->pclk)) + clk_disable_unprepare(msm_host->pclk); +bus_clk_disable: + if (!IS_ERR(msm_host->bus_clk)) + clk_disable_unprepare(msm_host->bus_clk); +pltfm_free: + sdhci_pltfm_free(pdev); + return ret; +} + +static int sdhci_msm_remove(struct platform_device *pdev) +{ + struct sdhci_host *host = platform_get_drvdata(pdev); + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_msm_host *msm_host = pltfm_host->priv; + int dead = (readl_relaxed(host->ioaddr + SDHCI_INT_STATUS) == + 0xffffffff); + + sdhci_remove_host(host, dead); + sdhci_pltfm_free(pdev); + sdhci_msm_vreg_disable(&pdev->dev, &msm_host->pdata.vdd); + sdhci_msm_vreg_disable(&pdev->dev, &msm_host->pdata.vdd_io); + clk_disable_unprepare(msm_host->clk); + clk_disable_unprepare(msm_host->pclk); + if (!IS_ERR(msm_host->bus_clk)) + clk_disable_unprepare(msm_host->bus_clk); + return 0; +} + +static struct platform_driver sdhci_msm_driver = { + .probe = sdhci_msm_probe, + .remove = sdhci_msm_remove, + .driver = { + .name = "sdhci_msm", + .owner = THIS_MODULE, + .of_match_table = sdhci_msm_dt_match, + }, +}; + +module_platform_driver(sdhci_msm_driver); + +MODULE_DESCRIPTION("Qualcomm Secure Digital Host Controller Interface driver"); +MODULE_LICENSE("GPL v2");