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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/mmc/host/sdhci-of-arasan.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/mmc/host/sdhci-of-arasan.c')
-rw-r--r--drivers/mmc/host/sdhci-of-arasan.c1772
1 files changed, 1772 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-of-arasan.c b/drivers/mmc/host/sdhci-of-arasan.c
new file mode 100644
index 000000000..cfb891430
--- /dev/null
+++ b/drivers/mmc/host/sdhci-of-arasan.c
@@ -0,0 +1,1772 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Arasan Secure Digital Host Controller Interface.
+ * Copyright (C) 2011 - 2012 Michal Simek <monstr@monstr.eu>
+ * Copyright (c) 2012 Wind River Systems, Inc.
+ * Copyright (C) 2013 Pengutronix e.K.
+ * Copyright (C) 2013 Xilinx Inc.
+ *
+ * Based on sdhci-of-esdhc.c
+ *
+ * Copyright (c) 2007 Freescale Semiconductor, Inc.
+ * Copyright (c) 2009 MontaVista Software, Inc.
+ *
+ * Authors: Xiaobo Xie <X.Xie@freescale.com>
+ * Anton Vorontsov <avorontsov@ru.mvista.com>
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/phy/phy.h>
+#include <linux/regmap.h>
+#include <linux/of.h>
+#include <linux/firmware/xlnx-zynqmp.h>
+
+#include "cqhci.h"
+#include "sdhci-cqhci.h"
+#include "sdhci-pltfm.h"
+
+#define SDHCI_ARASAN_VENDOR_REGISTER 0x78
+
+#define SDHCI_ARASAN_ITAPDLY_REGISTER 0xF0F8
+#define SDHCI_ARASAN_ITAPDLY_SEL_MASK 0xFF
+
+#define SDHCI_ARASAN_OTAPDLY_REGISTER 0xF0FC
+#define SDHCI_ARASAN_OTAPDLY_SEL_MASK 0x3F
+
+#define SDHCI_ARASAN_CQE_BASE_ADDR 0x200
+#define VENDOR_ENHANCED_STROBE BIT(0)
+
+#define PHY_CLK_TOO_SLOW_HZ 400000
+
+#define SDHCI_ITAPDLY_CHGWIN 0x200
+#define SDHCI_ITAPDLY_ENABLE 0x100
+#define SDHCI_OTAPDLY_ENABLE 0x40
+
+/* Default settings for ZynqMP Clock Phases */
+#define ZYNQMP_ICLK_PHASE {0, 63, 63, 0, 63, 0, 0, 183, 54, 0, 0}
+#define ZYNQMP_OCLK_PHASE {0, 72, 60, 0, 60, 72, 135, 48, 72, 135, 0}
+
+#define VERSAL_ICLK_PHASE {0, 132, 132, 0, 132, 0, 0, 162, 90, 0, 0}
+#define VERSAL_OCLK_PHASE {0, 60, 48, 0, 48, 72, 90, 36, 60, 90, 0}
+
+/*
+ * On some SoCs the syscon area has a feature where the upper 16-bits of
+ * each 32-bit register act as a write mask for the lower 16-bits. This allows
+ * atomic updates of the register without locking. This macro is used on SoCs
+ * that have that feature.
+ */
+#define HIWORD_UPDATE(val, mask, shift) \
+ ((val) << (shift) | (mask) << ((shift) + 16))
+
+/**
+ * struct sdhci_arasan_soc_ctl_field - Field used in sdhci_arasan_soc_ctl_map
+ *
+ * @reg: Offset within the syscon of the register containing this field
+ * @width: Number of bits for this field
+ * @shift: Bit offset within @reg of this field (or -1 if not avail)
+ */
+struct sdhci_arasan_soc_ctl_field {
+ u32 reg;
+ u16 width;
+ s16 shift;
+};
+
+/**
+ * struct sdhci_arasan_soc_ctl_map - Map in syscon to corecfg registers
+ *
+ * @baseclkfreq: Where to find corecfg_baseclkfreq
+ * @clockmultiplier: Where to find corecfg_clockmultiplier
+ * @support64b: Where to find SUPPORT64B bit
+ * @hiword_update: If true, use HIWORD_UPDATE to access the syscon
+ *
+ * It's up to the licensee of the Arsan IP block to make these available
+ * somewhere if needed. Presumably these will be scattered somewhere that's
+ * accessible via the syscon API.
+ */
+struct sdhci_arasan_soc_ctl_map {
+ struct sdhci_arasan_soc_ctl_field baseclkfreq;
+ struct sdhci_arasan_soc_ctl_field clockmultiplier;
+ struct sdhci_arasan_soc_ctl_field support64b;
+ bool hiword_update;
+};
+
+/**
+ * struct sdhci_arasan_clk_ops - Clock Operations for Arasan SD controller
+ *
+ * @sdcardclk_ops: The output clock related operations
+ * @sampleclk_ops: The sample clock related operations
+ */
+struct sdhci_arasan_clk_ops {
+ const struct clk_ops *sdcardclk_ops;
+ const struct clk_ops *sampleclk_ops;
+};
+
+/**
+ * struct sdhci_arasan_clk_data - Arasan Controller Clock Data.
+ *
+ * @sdcardclk_hw: Struct for the clock we might provide to a PHY.
+ * @sdcardclk: Pointer to normal 'struct clock' for sdcardclk_hw.
+ * @sampleclk_hw: Struct for the clock we might provide to a PHY.
+ * @sampleclk: Pointer to normal 'struct clock' for sampleclk_hw.
+ * @clk_phase_in: Array of Input Clock Phase Delays for all speed modes
+ * @clk_phase_out: Array of Output Clock Phase Delays for all speed modes
+ * @set_clk_delays: Function pointer for setting Clock Delays
+ * @clk_of_data: Platform specific runtime clock data storage pointer
+ */
+struct sdhci_arasan_clk_data {
+ struct clk_hw sdcardclk_hw;
+ struct clk *sdcardclk;
+ struct clk_hw sampleclk_hw;
+ struct clk *sampleclk;
+ int clk_phase_in[MMC_TIMING_MMC_HS400 + 1];
+ int clk_phase_out[MMC_TIMING_MMC_HS400 + 1];
+ void (*set_clk_delays)(struct sdhci_host *host);
+ void *clk_of_data;
+};
+
+/**
+ * struct sdhci_arasan_data - Arasan Controller Data
+ *
+ * @host: Pointer to the main SDHCI host structure.
+ * @clk_ahb: Pointer to the AHB clock
+ * @phy: Pointer to the generic phy
+ * @is_phy_on: True if the PHY is on; false if not.
+ * @has_cqe: True if controller has command queuing engine.
+ * @clk_data: Struct for the Arasan Controller Clock Data.
+ * @clk_ops: Struct for the Arasan Controller Clock Operations.
+ * @soc_ctl_base: Pointer to regmap for syscon for soc_ctl registers.
+ * @soc_ctl_map: Map to get offsets into soc_ctl registers.
+ * @quirks: Arasan deviations from spec.
+ */
+struct sdhci_arasan_data {
+ struct sdhci_host *host;
+ struct clk *clk_ahb;
+ struct phy *phy;
+ bool is_phy_on;
+
+ bool has_cqe;
+ struct sdhci_arasan_clk_data clk_data;
+ const struct sdhci_arasan_clk_ops *clk_ops;
+
+ struct regmap *soc_ctl_base;
+ const struct sdhci_arasan_soc_ctl_map *soc_ctl_map;
+ unsigned int quirks;
+
+/* Controller does not have CD wired and will not function normally without */
+#define SDHCI_ARASAN_QUIRK_FORCE_CDTEST BIT(0)
+/* Controller immediately reports SDHCI_CLOCK_INT_STABLE after enabling the
+ * internal clock even when the clock isn't stable */
+#define SDHCI_ARASAN_QUIRK_CLOCK_UNSTABLE BIT(1)
+/*
+ * Some of the Arasan variations might not have timing requirements
+ * met at 25MHz for Default Speed mode, those controllers work at
+ * 19MHz instead
+ */
+#define SDHCI_ARASAN_QUIRK_CLOCK_25_BROKEN BIT(2)
+};
+
+struct sdhci_arasan_of_data {
+ const struct sdhci_arasan_soc_ctl_map *soc_ctl_map;
+ const struct sdhci_pltfm_data *pdata;
+ const struct sdhci_arasan_clk_ops *clk_ops;
+};
+
+static const struct sdhci_arasan_soc_ctl_map rk3399_soc_ctl_map = {
+ .baseclkfreq = { .reg = 0xf000, .width = 8, .shift = 8 },
+ .clockmultiplier = { .reg = 0xf02c, .width = 8, .shift = 0},
+ .hiword_update = true,
+};
+
+static const struct sdhci_arasan_soc_ctl_map intel_lgm_emmc_soc_ctl_map = {
+ .baseclkfreq = { .reg = 0xa0, .width = 8, .shift = 2 },
+ .clockmultiplier = { .reg = 0, .width = -1, .shift = -1 },
+ .hiword_update = false,
+};
+
+static const struct sdhci_arasan_soc_ctl_map intel_lgm_sdxc_soc_ctl_map = {
+ .baseclkfreq = { .reg = 0x80, .width = 8, .shift = 2 },
+ .clockmultiplier = { .reg = 0, .width = -1, .shift = -1 },
+ .hiword_update = false,
+};
+
+static const struct sdhci_arasan_soc_ctl_map thunderbay_soc_ctl_map = {
+ .baseclkfreq = { .reg = 0x0, .width = 8, .shift = 14 },
+ .clockmultiplier = { .reg = 0x4, .width = 8, .shift = 14 },
+ .support64b = { .reg = 0x4, .width = 1, .shift = 24 },
+ .hiword_update = false,
+};
+
+static const struct sdhci_arasan_soc_ctl_map intel_keembay_soc_ctl_map = {
+ .baseclkfreq = { .reg = 0x0, .width = 8, .shift = 14 },
+ .clockmultiplier = { .reg = 0x4, .width = 8, .shift = 14 },
+ .support64b = { .reg = 0x4, .width = 1, .shift = 24 },
+ .hiword_update = false,
+};
+
+/**
+ * sdhci_arasan_syscon_write - Write to a field in soc_ctl registers
+ *
+ * @host: The sdhci_host
+ * @fld: The field to write to
+ * @val: The value to write
+ *
+ * This function allows writing to fields in sdhci_arasan_soc_ctl_map.
+ * Note that if a field is specified as not available (shift < 0) then
+ * this function will silently return an error code. It will be noisy
+ * and print errors for any other (unexpected) errors.
+ *
+ * Return: 0 on success and error value on error
+ */
+static int sdhci_arasan_syscon_write(struct sdhci_host *host,
+ const struct sdhci_arasan_soc_ctl_field *fld,
+ u32 val)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
+ struct regmap *soc_ctl_base = sdhci_arasan->soc_ctl_base;
+ u32 reg = fld->reg;
+ u16 width = fld->width;
+ s16 shift = fld->shift;
+ int ret;
+
+ /*
+ * Silently return errors for shift < 0 so caller doesn't have
+ * to check for fields which are optional. For fields that
+ * are required then caller needs to do something special
+ * anyway.
+ */
+ if (shift < 0)
+ return -EINVAL;
+
+ if (sdhci_arasan->soc_ctl_map->hiword_update)
+ ret = regmap_write(soc_ctl_base, reg,
+ HIWORD_UPDATE(val, GENMASK(width, 0),
+ shift));
+ else
+ ret = regmap_update_bits(soc_ctl_base, reg,
+ GENMASK(shift + width, shift),
+ val << shift);
+
+ /* Yell about (unexpected) regmap errors */
+ if (ret)
+ pr_warn("%s: Regmap write fail: %d\n",
+ mmc_hostname(host->mmc), ret);
+
+ return ret;
+}
+
+static void sdhci_arasan_set_clock(struct sdhci_host *host, unsigned int clock)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
+ struct sdhci_arasan_clk_data *clk_data = &sdhci_arasan->clk_data;
+ bool ctrl_phy = false;
+
+ if (!IS_ERR(sdhci_arasan->phy)) {
+ if (!sdhci_arasan->is_phy_on && clock <= PHY_CLK_TOO_SLOW_HZ) {
+ /*
+ * If PHY off, set clock to max speed and power PHY on.
+ *
+ * Although PHY docs apparently suggest power cycling
+ * when changing the clock the PHY doesn't like to be
+ * powered on while at low speeds like those used in ID
+ * mode. Even worse is powering the PHY on while the
+ * clock is off.
+ *
+ * To workaround the PHY limitations, the best we can
+ * do is to power it on at a faster speed and then slam
+ * through low speeds without power cycling.
+ */
+ sdhci_set_clock(host, host->max_clk);
+ if (phy_power_on(sdhci_arasan->phy)) {
+ pr_err("%s: Cannot power on phy.\n",
+ mmc_hostname(host->mmc));
+ return;
+ }
+
+ sdhci_arasan->is_phy_on = true;
+
+ /*
+ * We'll now fall through to the below case with
+ * ctrl_phy = false (so we won't turn off/on). The
+ * sdhci_set_clock() will set the real clock.
+ */
+ } else if (clock > PHY_CLK_TOO_SLOW_HZ) {
+ /*
+ * At higher clock speeds the PHY is fine being power
+ * cycled and docs say you _should_ power cycle when
+ * changing clock speeds.
+ */
+ ctrl_phy = true;
+ }
+ }
+
+ if (ctrl_phy && sdhci_arasan->is_phy_on) {
+ phy_power_off(sdhci_arasan->phy);
+ sdhci_arasan->is_phy_on = false;
+ }
+
+ if (sdhci_arasan->quirks & SDHCI_ARASAN_QUIRK_CLOCK_25_BROKEN) {
+ /*
+ * Some of the Arasan variations might not have timing
+ * requirements met at 25MHz for Default Speed mode,
+ * those controllers work at 19MHz instead.
+ */
+ if (clock == DEFAULT_SPEED_MAX_DTR)
+ clock = (DEFAULT_SPEED_MAX_DTR * 19) / 25;
+ }
+
+ /* Set the Input and Output Clock Phase Delays */
+ if (clk_data->set_clk_delays)
+ clk_data->set_clk_delays(host);
+
+ sdhci_set_clock(host, clock);
+
+ if (sdhci_arasan->quirks & SDHCI_ARASAN_QUIRK_CLOCK_UNSTABLE)
+ /*
+ * Some controllers immediately report SDHCI_CLOCK_INT_STABLE
+ * after enabling the clock even though the clock is not
+ * stable. Trying to use a clock without waiting here results
+ * in EILSEQ while detecting some older/slower cards. The
+ * chosen delay is the maximum delay from sdhci_set_clock.
+ */
+ msleep(20);
+
+ if (ctrl_phy) {
+ if (phy_power_on(sdhci_arasan->phy)) {
+ pr_err("%s: Cannot power on phy.\n",
+ mmc_hostname(host->mmc));
+ return;
+ }
+
+ sdhci_arasan->is_phy_on = true;
+ }
+}
+
+static void sdhci_arasan_hs400_enhanced_strobe(struct mmc_host *mmc,
+ struct mmc_ios *ios)
+{
+ u32 vendor;
+ struct sdhci_host *host = mmc_priv(mmc);
+
+ vendor = sdhci_readl(host, SDHCI_ARASAN_VENDOR_REGISTER);
+ if (ios->enhanced_strobe)
+ vendor |= VENDOR_ENHANCED_STROBE;
+ else
+ vendor &= ~VENDOR_ENHANCED_STROBE;
+
+ sdhci_writel(host, vendor, SDHCI_ARASAN_VENDOR_REGISTER);
+}
+
+static void sdhci_arasan_reset(struct sdhci_host *host, u8 mask)
+{
+ u8 ctrl;
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
+
+ sdhci_and_cqhci_reset(host, mask);
+
+ if (sdhci_arasan->quirks & SDHCI_ARASAN_QUIRK_FORCE_CDTEST) {
+ ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
+ ctrl |= SDHCI_CTRL_CDTEST_INS | SDHCI_CTRL_CDTEST_EN;
+ sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
+ }
+}
+
+static int sdhci_arasan_voltage_switch(struct mmc_host *mmc,
+ struct mmc_ios *ios)
+{
+ switch (ios->signal_voltage) {
+ case MMC_SIGNAL_VOLTAGE_180:
+ /*
+ * Plese don't switch to 1V8 as arasan,5.1 doesn't
+ * actually refer to this setting to indicate the
+ * signal voltage and the state machine will be broken
+ * actually if we force to enable 1V8. That's something
+ * like broken quirk but we could work around here.
+ */
+ return 0;
+ case MMC_SIGNAL_VOLTAGE_330:
+ case MMC_SIGNAL_VOLTAGE_120:
+ /* We don't support 3V3 and 1V2 */
+ break;
+ }
+
+ return -EINVAL;
+}
+
+static const struct sdhci_ops sdhci_arasan_ops = {
+ .set_clock = sdhci_arasan_set_clock,
+ .get_max_clock = sdhci_pltfm_clk_get_max_clock,
+ .get_timeout_clock = sdhci_pltfm_clk_get_max_clock,
+ .set_bus_width = sdhci_set_bus_width,
+ .reset = sdhci_arasan_reset,
+ .set_uhs_signaling = sdhci_set_uhs_signaling,
+ .set_power = sdhci_set_power_and_bus_voltage,
+};
+
+static u32 sdhci_arasan_cqhci_irq(struct sdhci_host *host, u32 intmask)
+{
+ int cmd_error = 0;
+ int data_error = 0;
+
+ if (!sdhci_cqe_irq(host, intmask, &cmd_error, &data_error))
+ return intmask;
+
+ cqhci_irq(host->mmc, intmask, cmd_error, data_error);
+
+ return 0;
+}
+
+static void sdhci_arasan_dumpregs(struct mmc_host *mmc)
+{
+ sdhci_dumpregs(mmc_priv(mmc));
+}
+
+static void sdhci_arasan_cqe_enable(struct mmc_host *mmc)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+ u32 reg;
+
+ reg = sdhci_readl(host, SDHCI_PRESENT_STATE);
+ while (reg & SDHCI_DATA_AVAILABLE) {
+ sdhci_readl(host, SDHCI_BUFFER);
+ reg = sdhci_readl(host, SDHCI_PRESENT_STATE);
+ }
+
+ sdhci_cqe_enable(mmc);
+}
+
+static const struct cqhci_host_ops sdhci_arasan_cqhci_ops = {
+ .enable = sdhci_arasan_cqe_enable,
+ .disable = sdhci_cqe_disable,
+ .dumpregs = sdhci_arasan_dumpregs,
+};
+
+static const struct sdhci_ops sdhci_arasan_cqe_ops = {
+ .set_clock = sdhci_arasan_set_clock,
+ .get_max_clock = sdhci_pltfm_clk_get_max_clock,
+ .get_timeout_clock = sdhci_pltfm_clk_get_max_clock,
+ .set_bus_width = sdhci_set_bus_width,
+ .reset = sdhci_arasan_reset,
+ .set_uhs_signaling = sdhci_set_uhs_signaling,
+ .set_power = sdhci_set_power_and_bus_voltage,
+ .irq = sdhci_arasan_cqhci_irq,
+};
+
+static const struct sdhci_pltfm_data sdhci_arasan_cqe_pdata = {
+ .ops = &sdhci_arasan_cqe_ops,
+ .quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
+ .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
+ SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN,
+};
+
+static const struct sdhci_pltfm_data sdhci_arasan_thunderbay_pdata = {
+ .ops = &sdhci_arasan_cqe_ops,
+ .quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN | SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
+ .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
+ SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN |
+ SDHCI_QUIRK2_STOP_WITH_TC |
+ SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400,
+};
+
+#ifdef CONFIG_PM_SLEEP
+/**
+ * sdhci_arasan_suspend - Suspend method for the driver
+ * @dev: Address of the device structure
+ *
+ * Put the device in a low power state.
+ *
+ * Return: 0 on success and error value on error
+ */
+static int sdhci_arasan_suspend(struct device *dev)
+{
+ struct sdhci_host *host = dev_get_drvdata(dev);
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
+ int ret;
+
+ if (host->tuning_mode != SDHCI_TUNING_MODE_3)
+ mmc_retune_needed(host->mmc);
+
+ if (sdhci_arasan->has_cqe) {
+ ret = cqhci_suspend(host->mmc);
+ if (ret)
+ return ret;
+ }
+
+ ret = sdhci_suspend_host(host);
+ if (ret)
+ return ret;
+
+ if (!IS_ERR(sdhci_arasan->phy) && sdhci_arasan->is_phy_on) {
+ ret = phy_power_off(sdhci_arasan->phy);
+ if (ret) {
+ dev_err(dev, "Cannot power off phy.\n");
+ if (sdhci_resume_host(host))
+ dev_err(dev, "Cannot resume host.\n");
+
+ return ret;
+ }
+ sdhci_arasan->is_phy_on = false;
+ }
+
+ clk_disable(pltfm_host->clk);
+ clk_disable(sdhci_arasan->clk_ahb);
+
+ return 0;
+}
+
+/**
+ * sdhci_arasan_resume - Resume method for the driver
+ * @dev: Address of the device structure
+ *
+ * Resume operation after suspend
+ *
+ * Return: 0 on success and error value on error
+ */
+static int sdhci_arasan_resume(struct device *dev)
+{
+ struct sdhci_host *host = dev_get_drvdata(dev);
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
+ int ret;
+
+ ret = clk_enable(sdhci_arasan->clk_ahb);
+ if (ret) {
+ dev_err(dev, "Cannot enable AHB clock.\n");
+ return ret;
+ }
+
+ ret = clk_enable(pltfm_host->clk);
+ if (ret) {
+ dev_err(dev, "Cannot enable SD clock.\n");
+ return ret;
+ }
+
+ if (!IS_ERR(sdhci_arasan->phy) && host->mmc->actual_clock) {
+ ret = phy_power_on(sdhci_arasan->phy);
+ if (ret) {
+ dev_err(dev, "Cannot power on phy.\n");
+ return ret;
+ }
+ sdhci_arasan->is_phy_on = true;
+ }
+
+ ret = sdhci_resume_host(host);
+ if (ret) {
+ dev_err(dev, "Cannot resume host.\n");
+ return ret;
+ }
+
+ if (sdhci_arasan->has_cqe)
+ return cqhci_resume(host->mmc);
+
+ return 0;
+}
+#endif /* ! CONFIG_PM_SLEEP */
+
+static SIMPLE_DEV_PM_OPS(sdhci_arasan_dev_pm_ops, sdhci_arasan_suspend,
+ sdhci_arasan_resume);
+
+/**
+ * sdhci_arasan_sdcardclk_recalc_rate - Return the card clock rate
+ *
+ * @hw: Pointer to the hardware clock structure.
+ * @parent_rate: The parent rate (should be rate of clk_xin).
+ *
+ * Return the current actual rate of the SD card clock. This can be used
+ * to communicate with out PHY.
+ *
+ * Return: The card clock rate.
+ */
+static unsigned long sdhci_arasan_sdcardclk_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct sdhci_arasan_clk_data *clk_data =
+ container_of(hw, struct sdhci_arasan_clk_data, sdcardclk_hw);
+ struct sdhci_arasan_data *sdhci_arasan =
+ container_of(clk_data, struct sdhci_arasan_data, clk_data);
+ struct sdhci_host *host = sdhci_arasan->host;
+
+ return host->mmc->actual_clock;
+}
+
+static const struct clk_ops arasan_sdcardclk_ops = {
+ .recalc_rate = sdhci_arasan_sdcardclk_recalc_rate,
+};
+
+/**
+ * sdhci_arasan_sampleclk_recalc_rate - Return the sampling clock rate
+ *
+ * @hw: Pointer to the hardware clock structure.
+ * @parent_rate: The parent rate (should be rate of clk_xin).
+ *
+ * Return the current actual rate of the sampling clock. This can be used
+ * to communicate with out PHY.
+ *
+ * Return: The sample clock rate.
+ */
+static unsigned long sdhci_arasan_sampleclk_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct sdhci_arasan_clk_data *clk_data =
+ container_of(hw, struct sdhci_arasan_clk_data, sampleclk_hw);
+ struct sdhci_arasan_data *sdhci_arasan =
+ container_of(clk_data, struct sdhci_arasan_data, clk_data);
+ struct sdhci_host *host = sdhci_arasan->host;
+
+ return host->mmc->actual_clock;
+}
+
+static const struct clk_ops arasan_sampleclk_ops = {
+ .recalc_rate = sdhci_arasan_sampleclk_recalc_rate,
+};
+
+/**
+ * sdhci_zynqmp_sdcardclk_set_phase - Set the SD Output Clock Tap Delays
+ *
+ * @hw: Pointer to the hardware clock structure.
+ * @degrees: The clock phase shift between 0 - 359.
+ *
+ * Set the SD Output Clock Tap Delays for Output path
+ *
+ * Return: 0 on success and error value on error
+ */
+static int sdhci_zynqmp_sdcardclk_set_phase(struct clk_hw *hw, int degrees)
+{
+ struct sdhci_arasan_clk_data *clk_data =
+ container_of(hw, struct sdhci_arasan_clk_data, sdcardclk_hw);
+ struct sdhci_arasan_data *sdhci_arasan =
+ container_of(clk_data, struct sdhci_arasan_data, clk_data);
+ struct sdhci_host *host = sdhci_arasan->host;
+ const char *clk_name = clk_hw_get_name(hw);
+ u32 node_id = !strcmp(clk_name, "clk_out_sd0") ? NODE_SD_0 : NODE_SD_1;
+ u8 tap_delay, tap_max = 0;
+ int ret;
+
+ /* This is applicable for SDHCI_SPEC_300 and above */
+ if (host->version < SDHCI_SPEC_300)
+ return 0;
+
+ switch (host->timing) {
+ case MMC_TIMING_MMC_HS:
+ case MMC_TIMING_SD_HS:
+ case MMC_TIMING_UHS_SDR25:
+ case MMC_TIMING_UHS_DDR50:
+ case MMC_TIMING_MMC_DDR52:
+ /* For 50MHz clock, 30 Taps are available */
+ tap_max = 30;
+ break;
+ case MMC_TIMING_UHS_SDR50:
+ /* For 100MHz clock, 15 Taps are available */
+ tap_max = 15;
+ break;
+ case MMC_TIMING_UHS_SDR104:
+ case MMC_TIMING_MMC_HS200:
+ /* For 200MHz clock, 8 Taps are available */
+ tap_max = 8;
+ break;
+ default:
+ break;
+ }
+
+ tap_delay = (degrees * tap_max) / 360;
+
+ /* Set the Clock Phase */
+ ret = zynqmp_pm_set_sd_tapdelay(node_id, PM_TAPDELAY_OUTPUT, tap_delay);
+ if (ret)
+ pr_err("Error setting Output Tap Delay\n");
+
+ /* Release DLL Reset */
+ zynqmp_pm_sd_dll_reset(node_id, PM_DLL_RESET_RELEASE);
+
+ return ret;
+}
+
+static const struct clk_ops zynqmp_sdcardclk_ops = {
+ .recalc_rate = sdhci_arasan_sdcardclk_recalc_rate,
+ .set_phase = sdhci_zynqmp_sdcardclk_set_phase,
+};
+
+/**
+ * sdhci_zynqmp_sampleclk_set_phase - Set the SD Input Clock Tap Delays
+ *
+ * @hw: Pointer to the hardware clock structure.
+ * @degrees: The clock phase shift between 0 - 359.
+ *
+ * Set the SD Input Clock Tap Delays for Input path
+ *
+ * Return: 0 on success and error value on error
+ */
+static int sdhci_zynqmp_sampleclk_set_phase(struct clk_hw *hw, int degrees)
+{
+ struct sdhci_arasan_clk_data *clk_data =
+ container_of(hw, struct sdhci_arasan_clk_data, sampleclk_hw);
+ struct sdhci_arasan_data *sdhci_arasan =
+ container_of(clk_data, struct sdhci_arasan_data, clk_data);
+ struct sdhci_host *host = sdhci_arasan->host;
+ const char *clk_name = clk_hw_get_name(hw);
+ u32 node_id = !strcmp(clk_name, "clk_in_sd0") ? NODE_SD_0 : NODE_SD_1;
+ u8 tap_delay, tap_max = 0;
+ int ret;
+
+ /* This is applicable for SDHCI_SPEC_300 and above */
+ if (host->version < SDHCI_SPEC_300)
+ return 0;
+
+ /* Assert DLL Reset */
+ zynqmp_pm_sd_dll_reset(node_id, PM_DLL_RESET_ASSERT);
+
+ switch (host->timing) {
+ case MMC_TIMING_MMC_HS:
+ case MMC_TIMING_SD_HS:
+ case MMC_TIMING_UHS_SDR25:
+ case MMC_TIMING_UHS_DDR50:
+ case MMC_TIMING_MMC_DDR52:
+ /* For 50MHz clock, 120 Taps are available */
+ tap_max = 120;
+ break;
+ case MMC_TIMING_UHS_SDR50:
+ /* For 100MHz clock, 60 Taps are available */
+ tap_max = 60;
+ break;
+ case MMC_TIMING_UHS_SDR104:
+ case MMC_TIMING_MMC_HS200:
+ /* For 200MHz clock, 30 Taps are available */
+ tap_max = 30;
+ break;
+ default:
+ break;
+ }
+
+ tap_delay = (degrees * tap_max) / 360;
+
+ /* Set the Clock Phase */
+ ret = zynqmp_pm_set_sd_tapdelay(node_id, PM_TAPDELAY_INPUT, tap_delay);
+ if (ret)
+ pr_err("Error setting Input Tap Delay\n");
+
+ return ret;
+}
+
+static const struct clk_ops zynqmp_sampleclk_ops = {
+ .recalc_rate = sdhci_arasan_sampleclk_recalc_rate,
+ .set_phase = sdhci_zynqmp_sampleclk_set_phase,
+};
+
+/**
+ * sdhci_versal_sdcardclk_set_phase - Set the SD Output Clock Tap Delays
+ *
+ * @hw: Pointer to the hardware clock structure.
+ * @degrees: The clock phase shift between 0 - 359.
+ *
+ * Set the SD Output Clock Tap Delays for Output path
+ *
+ * Return: 0 on success and error value on error
+ */
+static int sdhci_versal_sdcardclk_set_phase(struct clk_hw *hw, int degrees)
+{
+ struct sdhci_arasan_clk_data *clk_data =
+ container_of(hw, struct sdhci_arasan_clk_data, sdcardclk_hw);
+ struct sdhci_arasan_data *sdhci_arasan =
+ container_of(clk_data, struct sdhci_arasan_data, clk_data);
+ struct sdhci_host *host = sdhci_arasan->host;
+ u8 tap_delay, tap_max = 0;
+
+ /* This is applicable for SDHCI_SPEC_300 and above */
+ if (host->version < SDHCI_SPEC_300)
+ return 0;
+
+ switch (host->timing) {
+ case MMC_TIMING_MMC_HS:
+ case MMC_TIMING_SD_HS:
+ case MMC_TIMING_UHS_SDR25:
+ case MMC_TIMING_UHS_DDR50:
+ case MMC_TIMING_MMC_DDR52:
+ /* For 50MHz clock, 30 Taps are available */
+ tap_max = 30;
+ break;
+ case MMC_TIMING_UHS_SDR50:
+ /* For 100MHz clock, 15 Taps are available */
+ tap_max = 15;
+ break;
+ case MMC_TIMING_UHS_SDR104:
+ case MMC_TIMING_MMC_HS200:
+ /* For 200MHz clock, 8 Taps are available */
+ tap_max = 8;
+ break;
+ default:
+ break;
+ }
+
+ tap_delay = (degrees * tap_max) / 360;
+
+ /* Set the Clock Phase */
+ if (tap_delay) {
+ u32 regval;
+
+ regval = sdhci_readl(host, SDHCI_ARASAN_OTAPDLY_REGISTER);
+ regval |= SDHCI_OTAPDLY_ENABLE;
+ sdhci_writel(host, regval, SDHCI_ARASAN_OTAPDLY_REGISTER);
+ regval &= ~SDHCI_ARASAN_OTAPDLY_SEL_MASK;
+ regval |= tap_delay;
+ sdhci_writel(host, regval, SDHCI_ARASAN_OTAPDLY_REGISTER);
+ }
+
+ return 0;
+}
+
+static const struct clk_ops versal_sdcardclk_ops = {
+ .recalc_rate = sdhci_arasan_sdcardclk_recalc_rate,
+ .set_phase = sdhci_versal_sdcardclk_set_phase,
+};
+
+/**
+ * sdhci_versal_sampleclk_set_phase - Set the SD Input Clock Tap Delays
+ *
+ * @hw: Pointer to the hardware clock structure.
+ * @degrees: The clock phase shift between 0 - 359.
+ *
+ * Set the SD Input Clock Tap Delays for Input path
+ *
+ * Return: 0 on success and error value on error
+ */
+static int sdhci_versal_sampleclk_set_phase(struct clk_hw *hw, int degrees)
+{
+ struct sdhci_arasan_clk_data *clk_data =
+ container_of(hw, struct sdhci_arasan_clk_data, sampleclk_hw);
+ struct sdhci_arasan_data *sdhci_arasan =
+ container_of(clk_data, struct sdhci_arasan_data, clk_data);
+ struct sdhci_host *host = sdhci_arasan->host;
+ u8 tap_delay, tap_max = 0;
+
+ /* This is applicable for SDHCI_SPEC_300 and above */
+ if (host->version < SDHCI_SPEC_300)
+ return 0;
+
+ switch (host->timing) {
+ case MMC_TIMING_MMC_HS:
+ case MMC_TIMING_SD_HS:
+ case MMC_TIMING_UHS_SDR25:
+ case MMC_TIMING_UHS_DDR50:
+ case MMC_TIMING_MMC_DDR52:
+ /* For 50MHz clock, 120 Taps are available */
+ tap_max = 120;
+ break;
+ case MMC_TIMING_UHS_SDR50:
+ /* For 100MHz clock, 60 Taps are available */
+ tap_max = 60;
+ break;
+ case MMC_TIMING_UHS_SDR104:
+ case MMC_TIMING_MMC_HS200:
+ /* For 200MHz clock, 30 Taps are available */
+ tap_max = 30;
+ break;
+ default:
+ break;
+ }
+
+ tap_delay = (degrees * tap_max) / 360;
+
+ /* Set the Clock Phase */
+ if (tap_delay) {
+ u32 regval;
+
+ regval = sdhci_readl(host, SDHCI_ARASAN_ITAPDLY_REGISTER);
+ regval |= SDHCI_ITAPDLY_CHGWIN;
+ sdhci_writel(host, regval, SDHCI_ARASAN_ITAPDLY_REGISTER);
+ regval |= SDHCI_ITAPDLY_ENABLE;
+ sdhci_writel(host, regval, SDHCI_ARASAN_ITAPDLY_REGISTER);
+ regval &= ~SDHCI_ARASAN_ITAPDLY_SEL_MASK;
+ regval |= tap_delay;
+ sdhci_writel(host, regval, SDHCI_ARASAN_ITAPDLY_REGISTER);
+ regval &= ~SDHCI_ITAPDLY_CHGWIN;
+ sdhci_writel(host, regval, SDHCI_ARASAN_ITAPDLY_REGISTER);
+ }
+
+ return 0;
+}
+
+static const struct clk_ops versal_sampleclk_ops = {
+ .recalc_rate = sdhci_arasan_sampleclk_recalc_rate,
+ .set_phase = sdhci_versal_sampleclk_set_phase,
+};
+
+static void arasan_zynqmp_dll_reset(struct sdhci_host *host, u32 deviceid)
+{
+ u16 clk;
+
+ clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
+ clk &= ~(SDHCI_CLOCK_CARD_EN | SDHCI_CLOCK_INT_EN);
+ sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
+
+ /* Issue DLL Reset */
+ zynqmp_pm_sd_dll_reset(deviceid, PM_DLL_RESET_PULSE);
+
+ clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
+
+ sdhci_enable_clk(host, clk);
+}
+
+static int arasan_zynqmp_execute_tuning(struct mmc_host *mmc, u32 opcode)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
+ struct clk_hw *hw = &sdhci_arasan->clk_data.sdcardclk_hw;
+ const char *clk_name = clk_hw_get_name(hw);
+ u32 device_id = !strcmp(clk_name, "clk_out_sd0") ? NODE_SD_0 :
+ NODE_SD_1;
+ int err;
+
+ /* ZynqMP SD controller does not perform auto tuning in DDR50 mode */
+ if (mmc->ios.timing == MMC_TIMING_UHS_DDR50)
+ return 0;
+
+ arasan_zynqmp_dll_reset(host, device_id);
+
+ err = sdhci_execute_tuning(mmc, opcode);
+ if (err)
+ return err;
+
+ arasan_zynqmp_dll_reset(host, device_id);
+
+ return 0;
+}
+
+/**
+ * sdhci_arasan_update_clockmultiplier - Set corecfg_clockmultiplier
+ *
+ * @host: The sdhci_host
+ * @value: The value to write
+ *
+ * The corecfg_clockmultiplier is supposed to contain clock multiplier
+ * value of programmable clock generator.
+ *
+ * NOTES:
+ * - Many existing devices don't seem to do this and work fine. To keep
+ * compatibility for old hardware where the device tree doesn't provide a
+ * register map, this function is a noop if a soc_ctl_map hasn't been provided
+ * for this platform.
+ * - The value of corecfg_clockmultiplier should sync with that of corresponding
+ * value reading from sdhci_capability_register. So this function is called
+ * once at probe time and never called again.
+ */
+static void sdhci_arasan_update_clockmultiplier(struct sdhci_host *host,
+ u32 value)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
+ const struct sdhci_arasan_soc_ctl_map *soc_ctl_map =
+ sdhci_arasan->soc_ctl_map;
+
+ /* Having a map is optional */
+ if (!soc_ctl_map)
+ return;
+
+ /* If we have a map, we expect to have a syscon */
+ if (!sdhci_arasan->soc_ctl_base) {
+ pr_warn("%s: Have regmap, but no soc-ctl-syscon\n",
+ mmc_hostname(host->mmc));
+ return;
+ }
+
+ sdhci_arasan_syscon_write(host, &soc_ctl_map->clockmultiplier, value);
+}
+
+/**
+ * sdhci_arasan_update_baseclkfreq - Set corecfg_baseclkfreq
+ *
+ * @host: The sdhci_host
+ *
+ * The corecfg_baseclkfreq is supposed to contain the MHz of clk_xin. This
+ * function can be used to make that happen.
+ *
+ * NOTES:
+ * - Many existing devices don't seem to do this and work fine. To keep
+ * compatibility for old hardware where the device tree doesn't provide a
+ * register map, this function is a noop if a soc_ctl_map hasn't been provided
+ * for this platform.
+ * - It's assumed that clk_xin is not dynamic and that we use the SDHCI divider
+ * to achieve lower clock rates. That means that this function is called once
+ * at probe time and never called again.
+ */
+static void sdhci_arasan_update_baseclkfreq(struct sdhci_host *host)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
+ const struct sdhci_arasan_soc_ctl_map *soc_ctl_map =
+ sdhci_arasan->soc_ctl_map;
+ u32 mhz = DIV_ROUND_CLOSEST_ULL(clk_get_rate(pltfm_host->clk), 1000000);
+
+ /* Having a map is optional */
+ if (!soc_ctl_map)
+ return;
+
+ /* If we have a map, we expect to have a syscon */
+ if (!sdhci_arasan->soc_ctl_base) {
+ pr_warn("%s: Have regmap, but no soc-ctl-syscon\n",
+ mmc_hostname(host->mmc));
+ return;
+ }
+
+ sdhci_arasan_syscon_write(host, &soc_ctl_map->baseclkfreq, mhz);
+}
+
+static void sdhci_arasan_set_clk_delays(struct sdhci_host *host)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
+ struct sdhci_arasan_clk_data *clk_data = &sdhci_arasan->clk_data;
+
+ clk_set_phase(clk_data->sampleclk,
+ clk_data->clk_phase_in[host->timing]);
+ clk_set_phase(clk_data->sdcardclk,
+ clk_data->clk_phase_out[host->timing]);
+}
+
+static void arasan_dt_read_clk_phase(struct device *dev,
+ struct sdhci_arasan_clk_data *clk_data,
+ unsigned int timing, const char *prop)
+{
+ struct device_node *np = dev->of_node;
+
+ u32 clk_phase[2] = {0};
+ int ret;
+
+ /*
+ * Read Tap Delay values from DT, if the DT does not contain the
+ * Tap Values then use the pre-defined values.
+ */
+ ret = of_property_read_variable_u32_array(np, prop, &clk_phase[0],
+ 2, 0);
+ if (ret < 0) {
+ dev_dbg(dev, "Using predefined clock phase for %s = %d %d\n",
+ prop, clk_data->clk_phase_in[timing],
+ clk_data->clk_phase_out[timing]);
+ return;
+ }
+
+ /* The values read are Input and Output Clock Delays in order */
+ clk_data->clk_phase_in[timing] = clk_phase[0];
+ clk_data->clk_phase_out[timing] = clk_phase[1];
+}
+
+/**
+ * arasan_dt_parse_clk_phases - Read Clock Delay values from DT
+ *
+ * @dev: Pointer to our struct device.
+ * @clk_data: Pointer to the Clock Data structure
+ *
+ * Called at initialization to parse the values of Clock Delays.
+ */
+static void arasan_dt_parse_clk_phases(struct device *dev,
+ struct sdhci_arasan_clk_data *clk_data)
+{
+ u32 mio_bank = 0;
+ int i;
+
+ /*
+ * This has been kept as a pointer and is assigned a function here.
+ * So that different controller variants can assign their own handling
+ * function.
+ */
+ clk_data->set_clk_delays = sdhci_arasan_set_clk_delays;
+
+ if (of_device_is_compatible(dev->of_node, "xlnx,zynqmp-8.9a")) {
+ u32 zynqmp_iclk_phase[MMC_TIMING_MMC_HS400 + 1] =
+ ZYNQMP_ICLK_PHASE;
+ u32 zynqmp_oclk_phase[MMC_TIMING_MMC_HS400 + 1] =
+ ZYNQMP_OCLK_PHASE;
+
+ of_property_read_u32(dev->of_node, "xlnx,mio-bank", &mio_bank);
+ if (mio_bank == 2) {
+ zynqmp_oclk_phase[MMC_TIMING_UHS_SDR104] = 90;
+ zynqmp_oclk_phase[MMC_TIMING_MMC_HS200] = 90;
+ }
+
+ for (i = 0; i <= MMC_TIMING_MMC_HS400; i++) {
+ clk_data->clk_phase_in[i] = zynqmp_iclk_phase[i];
+ clk_data->clk_phase_out[i] = zynqmp_oclk_phase[i];
+ }
+ }
+
+ if (of_device_is_compatible(dev->of_node, "xlnx,versal-8.9a")) {
+ u32 versal_iclk_phase[MMC_TIMING_MMC_HS400 + 1] =
+ VERSAL_ICLK_PHASE;
+ u32 versal_oclk_phase[MMC_TIMING_MMC_HS400 + 1] =
+ VERSAL_OCLK_PHASE;
+
+ for (i = 0; i <= MMC_TIMING_MMC_HS400; i++) {
+ clk_data->clk_phase_in[i] = versal_iclk_phase[i];
+ clk_data->clk_phase_out[i] = versal_oclk_phase[i];
+ }
+ }
+
+ arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_LEGACY,
+ "clk-phase-legacy");
+ arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_MMC_HS,
+ "clk-phase-mmc-hs");
+ arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_SD_HS,
+ "clk-phase-sd-hs");
+ arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_UHS_SDR12,
+ "clk-phase-uhs-sdr12");
+ arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_UHS_SDR25,
+ "clk-phase-uhs-sdr25");
+ arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_UHS_SDR50,
+ "clk-phase-uhs-sdr50");
+ arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_UHS_SDR104,
+ "clk-phase-uhs-sdr104");
+ arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_UHS_DDR50,
+ "clk-phase-uhs-ddr50");
+ arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_MMC_DDR52,
+ "clk-phase-mmc-ddr52");
+ arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_MMC_HS200,
+ "clk-phase-mmc-hs200");
+ arasan_dt_read_clk_phase(dev, clk_data, MMC_TIMING_MMC_HS400,
+ "clk-phase-mmc-hs400");
+}
+
+static const struct sdhci_pltfm_data sdhci_arasan_pdata = {
+ .ops = &sdhci_arasan_ops,
+ .quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
+ .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
+ SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN |
+ SDHCI_QUIRK2_STOP_WITH_TC,
+};
+
+static const struct sdhci_arasan_clk_ops arasan_clk_ops = {
+ .sdcardclk_ops = &arasan_sdcardclk_ops,
+ .sampleclk_ops = &arasan_sampleclk_ops,
+};
+
+static struct sdhci_arasan_of_data sdhci_arasan_generic_data = {
+ .pdata = &sdhci_arasan_pdata,
+ .clk_ops = &arasan_clk_ops,
+};
+
+static const struct sdhci_arasan_of_data sdhci_arasan_thunderbay_data = {
+ .soc_ctl_map = &thunderbay_soc_ctl_map,
+ .pdata = &sdhci_arasan_thunderbay_pdata,
+ .clk_ops = &arasan_clk_ops,
+};
+
+static const struct sdhci_pltfm_data sdhci_keembay_emmc_pdata = {
+ .ops = &sdhci_arasan_cqe_ops,
+ .quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN |
+ SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
+ SDHCI_QUIRK_NO_LED |
+ SDHCI_QUIRK_32BIT_DMA_ADDR |
+ SDHCI_QUIRK_32BIT_DMA_SIZE |
+ SDHCI_QUIRK_32BIT_ADMA_SIZE,
+ .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
+ SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN |
+ SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400 |
+ SDHCI_QUIRK2_STOP_WITH_TC |
+ SDHCI_QUIRK2_BROKEN_64_BIT_DMA,
+};
+
+static const struct sdhci_pltfm_data sdhci_keembay_sd_pdata = {
+ .ops = &sdhci_arasan_ops,
+ .quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN |
+ SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
+ SDHCI_QUIRK_NO_LED |
+ SDHCI_QUIRK_32BIT_DMA_ADDR |
+ SDHCI_QUIRK_32BIT_DMA_SIZE |
+ SDHCI_QUIRK_32BIT_ADMA_SIZE,
+ .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
+ SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN |
+ SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON |
+ SDHCI_QUIRK2_STOP_WITH_TC |
+ SDHCI_QUIRK2_BROKEN_64_BIT_DMA,
+};
+
+static const struct sdhci_pltfm_data sdhci_keembay_sdio_pdata = {
+ .ops = &sdhci_arasan_ops,
+ .quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN |
+ SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
+ SDHCI_QUIRK_NO_LED |
+ SDHCI_QUIRK_32BIT_DMA_ADDR |
+ SDHCI_QUIRK_32BIT_DMA_SIZE |
+ SDHCI_QUIRK_32BIT_ADMA_SIZE,
+ .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
+ SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN |
+ SDHCI_QUIRK2_HOST_OFF_CARD_ON |
+ SDHCI_QUIRK2_BROKEN_64_BIT_DMA,
+};
+
+static struct sdhci_arasan_of_data sdhci_arasan_rk3399_data = {
+ .soc_ctl_map = &rk3399_soc_ctl_map,
+ .pdata = &sdhci_arasan_cqe_pdata,
+ .clk_ops = &arasan_clk_ops,
+};
+
+static struct sdhci_arasan_of_data intel_lgm_emmc_data = {
+ .soc_ctl_map = &intel_lgm_emmc_soc_ctl_map,
+ .pdata = &sdhci_arasan_cqe_pdata,
+ .clk_ops = &arasan_clk_ops,
+};
+
+static struct sdhci_arasan_of_data intel_lgm_sdxc_data = {
+ .soc_ctl_map = &intel_lgm_sdxc_soc_ctl_map,
+ .pdata = &sdhci_arasan_cqe_pdata,
+ .clk_ops = &arasan_clk_ops,
+};
+
+static const struct sdhci_pltfm_data sdhci_arasan_zynqmp_pdata = {
+ .ops = &sdhci_arasan_ops,
+ .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
+ SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN |
+ SDHCI_QUIRK2_STOP_WITH_TC,
+};
+
+static const struct sdhci_arasan_clk_ops zynqmp_clk_ops = {
+ .sdcardclk_ops = &zynqmp_sdcardclk_ops,
+ .sampleclk_ops = &zynqmp_sampleclk_ops,
+};
+
+static struct sdhci_arasan_of_data sdhci_arasan_zynqmp_data = {
+ .pdata = &sdhci_arasan_zynqmp_pdata,
+ .clk_ops = &zynqmp_clk_ops,
+};
+
+static const struct sdhci_arasan_clk_ops versal_clk_ops = {
+ .sdcardclk_ops = &versal_sdcardclk_ops,
+ .sampleclk_ops = &versal_sampleclk_ops,
+};
+
+static struct sdhci_arasan_of_data sdhci_arasan_versal_data = {
+ .pdata = &sdhci_arasan_zynqmp_pdata,
+ .clk_ops = &versal_clk_ops,
+};
+
+static struct sdhci_arasan_of_data intel_keembay_emmc_data = {
+ .soc_ctl_map = &intel_keembay_soc_ctl_map,
+ .pdata = &sdhci_keembay_emmc_pdata,
+ .clk_ops = &arasan_clk_ops,
+};
+
+static struct sdhci_arasan_of_data intel_keembay_sd_data = {
+ .soc_ctl_map = &intel_keembay_soc_ctl_map,
+ .pdata = &sdhci_keembay_sd_pdata,
+ .clk_ops = &arasan_clk_ops,
+};
+
+static struct sdhci_arasan_of_data intel_keembay_sdio_data = {
+ .soc_ctl_map = &intel_keembay_soc_ctl_map,
+ .pdata = &sdhci_keembay_sdio_pdata,
+ .clk_ops = &arasan_clk_ops,
+};
+
+static const struct of_device_id sdhci_arasan_of_match[] = {
+ /* SoC-specific compatible strings w/ soc_ctl_map */
+ {
+ .compatible = "rockchip,rk3399-sdhci-5.1",
+ .data = &sdhci_arasan_rk3399_data,
+ },
+ {
+ .compatible = "intel,lgm-sdhci-5.1-emmc",
+ .data = &intel_lgm_emmc_data,
+ },
+ {
+ .compatible = "intel,lgm-sdhci-5.1-sdxc",
+ .data = &intel_lgm_sdxc_data,
+ },
+ {
+ .compatible = "intel,keembay-sdhci-5.1-emmc",
+ .data = &intel_keembay_emmc_data,
+ },
+ {
+ .compatible = "intel,keembay-sdhci-5.1-sd",
+ .data = &intel_keembay_sd_data,
+ },
+ {
+ .compatible = "intel,keembay-sdhci-5.1-sdio",
+ .data = &intel_keembay_sdio_data,
+ },
+ {
+ .compatible = "intel,thunderbay-sdhci-5.1",
+ .data = &sdhci_arasan_thunderbay_data,
+ },
+ /* Generic compatible below here */
+ {
+ .compatible = "arasan,sdhci-8.9a",
+ .data = &sdhci_arasan_generic_data,
+ },
+ {
+ .compatible = "arasan,sdhci-5.1",
+ .data = &sdhci_arasan_generic_data,
+ },
+ {
+ .compatible = "arasan,sdhci-4.9a",
+ .data = &sdhci_arasan_generic_data,
+ },
+ {
+ .compatible = "xlnx,zynqmp-8.9a",
+ .data = &sdhci_arasan_zynqmp_data,
+ },
+ {
+ .compatible = "xlnx,versal-8.9a",
+ .data = &sdhci_arasan_versal_data,
+ },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, sdhci_arasan_of_match);
+
+/**
+ * sdhci_arasan_register_sdcardclk - Register the sdcardclk for a PHY to use
+ *
+ * @sdhci_arasan: Our private data structure.
+ * @clk_xin: Pointer to the functional clock
+ * @dev: Pointer to our struct device.
+ *
+ * Some PHY devices need to know what the actual card clock is. In order for
+ * them to find out, we'll provide a clock through the common clock framework
+ * for them to query.
+ *
+ * Return: 0 on success and error value on error
+ */
+static int
+sdhci_arasan_register_sdcardclk(struct sdhci_arasan_data *sdhci_arasan,
+ struct clk *clk_xin,
+ struct device *dev)
+{
+ struct sdhci_arasan_clk_data *clk_data = &sdhci_arasan->clk_data;
+ struct device_node *np = dev->of_node;
+ struct clk_init_data sdcardclk_init;
+ const char *parent_clk_name;
+ int ret;
+
+ ret = of_property_read_string_index(np, "clock-output-names", 0,
+ &sdcardclk_init.name);
+ if (ret) {
+ dev_err(dev, "DT has #clock-cells but no clock-output-names\n");
+ return ret;
+ }
+
+ parent_clk_name = __clk_get_name(clk_xin);
+ sdcardclk_init.parent_names = &parent_clk_name;
+ sdcardclk_init.num_parents = 1;
+ sdcardclk_init.flags = CLK_GET_RATE_NOCACHE;
+ sdcardclk_init.ops = sdhci_arasan->clk_ops->sdcardclk_ops;
+
+ clk_data->sdcardclk_hw.init = &sdcardclk_init;
+ clk_data->sdcardclk =
+ devm_clk_register(dev, &clk_data->sdcardclk_hw);
+ if (IS_ERR(clk_data->sdcardclk))
+ return PTR_ERR(clk_data->sdcardclk);
+ clk_data->sdcardclk_hw.init = NULL;
+
+ ret = of_clk_add_provider(np, of_clk_src_simple_get,
+ clk_data->sdcardclk);
+ if (ret)
+ dev_err(dev, "Failed to add sdcard clock provider\n");
+
+ return ret;
+}
+
+/**
+ * sdhci_arasan_register_sampleclk - Register the sampleclk for a PHY to use
+ *
+ * @sdhci_arasan: Our private data structure.
+ * @clk_xin: Pointer to the functional clock
+ * @dev: Pointer to our struct device.
+ *
+ * Some PHY devices need to know what the actual card clock is. In order for
+ * them to find out, we'll provide a clock through the common clock framework
+ * for them to query.
+ *
+ * Return: 0 on success and error value on error
+ */
+static int
+sdhci_arasan_register_sampleclk(struct sdhci_arasan_data *sdhci_arasan,
+ struct clk *clk_xin,
+ struct device *dev)
+{
+ struct sdhci_arasan_clk_data *clk_data = &sdhci_arasan->clk_data;
+ struct device_node *np = dev->of_node;
+ struct clk_init_data sampleclk_init;
+ const char *parent_clk_name;
+ int ret;
+
+ ret = of_property_read_string_index(np, "clock-output-names", 1,
+ &sampleclk_init.name);
+ if (ret) {
+ dev_err(dev, "DT has #clock-cells but no clock-output-names\n");
+ return ret;
+ }
+
+ parent_clk_name = __clk_get_name(clk_xin);
+ sampleclk_init.parent_names = &parent_clk_name;
+ sampleclk_init.num_parents = 1;
+ sampleclk_init.flags = CLK_GET_RATE_NOCACHE;
+ sampleclk_init.ops = sdhci_arasan->clk_ops->sampleclk_ops;
+
+ clk_data->sampleclk_hw.init = &sampleclk_init;
+ clk_data->sampleclk =
+ devm_clk_register(dev, &clk_data->sampleclk_hw);
+ if (IS_ERR(clk_data->sampleclk))
+ return PTR_ERR(clk_data->sampleclk);
+ clk_data->sampleclk_hw.init = NULL;
+
+ ret = of_clk_add_provider(np, of_clk_src_simple_get,
+ clk_data->sampleclk);
+ if (ret)
+ dev_err(dev, "Failed to add sample clock provider\n");
+
+ return ret;
+}
+
+/**
+ * sdhci_arasan_unregister_sdclk - Undoes sdhci_arasan_register_sdclk()
+ *
+ * @dev: Pointer to our struct device.
+ *
+ * Should be called any time we're exiting and sdhci_arasan_register_sdclk()
+ * returned success.
+ */
+static void sdhci_arasan_unregister_sdclk(struct device *dev)
+{
+ struct device_node *np = dev->of_node;
+
+ if (!of_find_property(np, "#clock-cells", NULL))
+ return;
+
+ of_clk_del_provider(dev->of_node);
+}
+
+/**
+ * sdhci_arasan_update_support64b - Set SUPPORT_64B (64-bit System Bus Support)
+ * @host: The sdhci_host
+ * @value: The value to write
+ *
+ * This should be set based on the System Address Bus.
+ * 0: the Core supports only 32-bit System Address Bus.
+ * 1: the Core supports 64-bit System Address Bus.
+ *
+ * NOTE:
+ * For Keem Bay, it is required to clear this bit. Its default value is 1'b1.
+ * Keem Bay does not support 64-bit access.
+ */
+static void sdhci_arasan_update_support64b(struct sdhci_host *host, u32 value)
+{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
+ const struct sdhci_arasan_soc_ctl_map *soc_ctl_map;
+
+ /* Having a map is optional */
+ soc_ctl_map = sdhci_arasan->soc_ctl_map;
+ if (!soc_ctl_map)
+ return;
+
+ /* If we have a map, we expect to have a syscon */
+ if (!sdhci_arasan->soc_ctl_base) {
+ pr_warn("%s: Have regmap, but no soc-ctl-syscon\n",
+ mmc_hostname(host->mmc));
+ return;
+ }
+
+ sdhci_arasan_syscon_write(host, &soc_ctl_map->support64b, value);
+}
+
+/**
+ * sdhci_arasan_register_sdclk - Register the sdcardclk for a PHY to use
+ *
+ * @sdhci_arasan: Our private data structure.
+ * @clk_xin: Pointer to the functional clock
+ * @dev: Pointer to our struct device.
+ *
+ * Some PHY devices need to know what the actual card clock is. In order for
+ * them to find out, we'll provide a clock through the common clock framework
+ * for them to query.
+ *
+ * Note: without seriously re-architecting SDHCI's clock code and testing on
+ * all platforms, there's no way to create a totally beautiful clock here
+ * with all clock ops implemented. Instead, we'll just create a clock that can
+ * be queried and set the CLK_GET_RATE_NOCACHE attribute to tell common clock
+ * framework that we're doing things behind its back. This should be sufficient
+ * to create nice clean device tree bindings and later (if needed) we can try
+ * re-architecting SDHCI if we see some benefit to it.
+ *
+ * Return: 0 on success and error value on error
+ */
+static int sdhci_arasan_register_sdclk(struct sdhci_arasan_data *sdhci_arasan,
+ struct clk *clk_xin,
+ struct device *dev)
+{
+ struct device_node *np = dev->of_node;
+ u32 num_clks = 0;
+ int ret;
+
+ /* Providing a clock to the PHY is optional; no error if missing */
+ if (of_property_read_u32(np, "#clock-cells", &num_clks) < 0)
+ return 0;
+
+ ret = sdhci_arasan_register_sdcardclk(sdhci_arasan, clk_xin, dev);
+ if (ret)
+ return ret;
+
+ if (num_clks) {
+ ret = sdhci_arasan_register_sampleclk(sdhci_arasan, clk_xin,
+ dev);
+ if (ret) {
+ sdhci_arasan_unregister_sdclk(dev);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static int sdhci_arasan_add_host(struct sdhci_arasan_data *sdhci_arasan)
+{
+ struct sdhci_host *host = sdhci_arasan->host;
+ struct cqhci_host *cq_host;
+ bool dma64;
+ int ret;
+
+ if (!sdhci_arasan->has_cqe)
+ return sdhci_add_host(host);
+
+ ret = sdhci_setup_host(host);
+ if (ret)
+ return ret;
+
+ cq_host = devm_kzalloc(host->mmc->parent,
+ sizeof(*cq_host), GFP_KERNEL);
+ if (!cq_host) {
+ ret = -ENOMEM;
+ goto cleanup;
+ }
+
+ cq_host->mmio = host->ioaddr + SDHCI_ARASAN_CQE_BASE_ADDR;
+ cq_host->ops = &sdhci_arasan_cqhci_ops;
+
+ dma64 = host->flags & SDHCI_USE_64_BIT_DMA;
+ if (dma64)
+ cq_host->caps |= CQHCI_TASK_DESC_SZ_128;
+
+ ret = cqhci_init(cq_host, host->mmc, dma64);
+ if (ret)
+ goto cleanup;
+
+ ret = __sdhci_add_host(host);
+ if (ret)
+ goto cleanup;
+
+ return 0;
+
+cleanup:
+ sdhci_cleanup_host(host);
+ return ret;
+}
+
+static int sdhci_arasan_probe(struct platform_device *pdev)
+{
+ int ret;
+ struct device_node *node;
+ struct clk *clk_xin;
+ struct sdhci_host *host;
+ struct sdhci_pltfm_host *pltfm_host;
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ struct sdhci_arasan_data *sdhci_arasan;
+ const struct sdhci_arasan_of_data *data;
+
+ data = of_device_get_match_data(dev);
+ if (!data)
+ return -EINVAL;
+
+ host = sdhci_pltfm_init(pdev, data->pdata, sizeof(*sdhci_arasan));
+
+ if (IS_ERR(host))
+ return PTR_ERR(host);
+
+ pltfm_host = sdhci_priv(host);
+ sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
+ sdhci_arasan->host = host;
+
+ sdhci_arasan->soc_ctl_map = data->soc_ctl_map;
+ sdhci_arasan->clk_ops = data->clk_ops;
+
+ node = of_parse_phandle(np, "arasan,soc-ctl-syscon", 0);
+ if (node) {
+ sdhci_arasan->soc_ctl_base = syscon_node_to_regmap(node);
+ of_node_put(node);
+
+ if (IS_ERR(sdhci_arasan->soc_ctl_base)) {
+ ret = dev_err_probe(dev,
+ PTR_ERR(sdhci_arasan->soc_ctl_base),
+ "Can't get syscon\n");
+ goto err_pltfm_free;
+ }
+ }
+
+ sdhci_get_of_property(pdev);
+
+ sdhci_arasan->clk_ahb = devm_clk_get(dev, "clk_ahb");
+ if (IS_ERR(sdhci_arasan->clk_ahb)) {
+ ret = dev_err_probe(dev, PTR_ERR(sdhci_arasan->clk_ahb),
+ "clk_ahb clock not found.\n");
+ goto err_pltfm_free;
+ }
+
+ clk_xin = devm_clk_get(dev, "clk_xin");
+ if (IS_ERR(clk_xin)) {
+ ret = dev_err_probe(dev, PTR_ERR(clk_xin), "clk_xin clock not found.\n");
+ goto err_pltfm_free;
+ }
+
+ ret = clk_prepare_enable(sdhci_arasan->clk_ahb);
+ if (ret) {
+ dev_err(dev, "Unable to enable AHB clock.\n");
+ goto err_pltfm_free;
+ }
+
+ /* If clock-frequency property is set, use the provided value */
+ if (pltfm_host->clock &&
+ pltfm_host->clock != clk_get_rate(clk_xin)) {
+ ret = clk_set_rate(clk_xin, pltfm_host->clock);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to set SD clock rate\n");
+ goto clk_dis_ahb;
+ }
+ }
+
+ ret = clk_prepare_enable(clk_xin);
+ if (ret) {
+ dev_err(dev, "Unable to enable SD clock.\n");
+ goto clk_dis_ahb;
+ }
+
+ if (of_property_read_bool(np, "xlnx,fails-without-test-cd"))
+ sdhci_arasan->quirks |= SDHCI_ARASAN_QUIRK_FORCE_CDTEST;
+
+ if (of_property_read_bool(np, "xlnx,int-clock-stable-broken"))
+ sdhci_arasan->quirks |= SDHCI_ARASAN_QUIRK_CLOCK_UNSTABLE;
+
+ pltfm_host->clk = clk_xin;
+
+ if (of_device_is_compatible(np, "rockchip,rk3399-sdhci-5.1"))
+ sdhci_arasan_update_clockmultiplier(host, 0x0);
+
+ if (of_device_is_compatible(np, "intel,keembay-sdhci-5.1-emmc") ||
+ of_device_is_compatible(np, "intel,keembay-sdhci-5.1-sd") ||
+ of_device_is_compatible(np, "intel,keembay-sdhci-5.1-sdio") ||
+ of_device_is_compatible(np, "intel,thunderbay-sdhci-5.1")) {
+ sdhci_arasan_update_clockmultiplier(host, 0x0);
+ sdhci_arasan_update_support64b(host, 0x0);
+
+ host->mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY;
+ }
+
+ sdhci_arasan_update_baseclkfreq(host);
+
+ ret = sdhci_arasan_register_sdclk(sdhci_arasan, clk_xin, dev);
+ if (ret)
+ goto clk_disable_all;
+
+ if (of_device_is_compatible(np, "xlnx,zynqmp-8.9a")) {
+ host->mmc_host_ops.execute_tuning =
+ arasan_zynqmp_execute_tuning;
+
+ sdhci_arasan->quirks |= SDHCI_ARASAN_QUIRK_CLOCK_25_BROKEN;
+ host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12;
+ }
+
+ arasan_dt_parse_clk_phases(dev, &sdhci_arasan->clk_data);
+
+ ret = mmc_of_parse(host->mmc);
+ if (ret) {
+ ret = dev_err_probe(dev, ret, "parsing dt failed.\n");
+ goto unreg_clk;
+ }
+
+ sdhci_arasan->phy = ERR_PTR(-ENODEV);
+ if (of_device_is_compatible(np, "arasan,sdhci-5.1")) {
+ sdhci_arasan->phy = devm_phy_get(dev, "phy_arasan");
+ if (IS_ERR(sdhci_arasan->phy)) {
+ ret = dev_err_probe(dev, PTR_ERR(sdhci_arasan->phy),
+ "No phy for arasan,sdhci-5.1.\n");
+ goto unreg_clk;
+ }
+
+ ret = phy_init(sdhci_arasan->phy);
+ if (ret < 0) {
+ dev_err(dev, "phy_init err.\n");
+ goto unreg_clk;
+ }
+
+ host->mmc_host_ops.hs400_enhanced_strobe =
+ sdhci_arasan_hs400_enhanced_strobe;
+ host->mmc_host_ops.start_signal_voltage_switch =
+ sdhci_arasan_voltage_switch;
+ sdhci_arasan->has_cqe = true;
+ host->mmc->caps2 |= MMC_CAP2_CQE;
+
+ if (!of_property_read_bool(np, "disable-cqe-dcmd"))
+ host->mmc->caps2 |= MMC_CAP2_CQE_DCMD;
+ }
+
+ ret = sdhci_arasan_add_host(sdhci_arasan);
+ if (ret)
+ goto err_add_host;
+
+ return 0;
+
+err_add_host:
+ if (!IS_ERR(sdhci_arasan->phy))
+ phy_exit(sdhci_arasan->phy);
+unreg_clk:
+ sdhci_arasan_unregister_sdclk(dev);
+clk_disable_all:
+ clk_disable_unprepare(clk_xin);
+clk_dis_ahb:
+ clk_disable_unprepare(sdhci_arasan->clk_ahb);
+err_pltfm_free:
+ sdhci_pltfm_free(pdev);
+ return ret;
+}
+
+static int sdhci_arasan_remove(struct platform_device *pdev)
+{
+ struct sdhci_host *host = platform_get_drvdata(pdev);
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
+ struct clk *clk_ahb = sdhci_arasan->clk_ahb;
+
+ if (!IS_ERR(sdhci_arasan->phy)) {
+ if (sdhci_arasan->is_phy_on)
+ phy_power_off(sdhci_arasan->phy);
+ phy_exit(sdhci_arasan->phy);
+ }
+
+ sdhci_arasan_unregister_sdclk(&pdev->dev);
+
+ sdhci_pltfm_unregister(pdev);
+
+ clk_disable_unprepare(clk_ahb);
+
+ return 0;
+}
+
+static struct platform_driver sdhci_arasan_driver = {
+ .driver = {
+ .name = "sdhci-arasan",
+ .probe_type = PROBE_PREFER_ASYNCHRONOUS,
+ .of_match_table = sdhci_arasan_of_match,
+ .pm = &sdhci_arasan_dev_pm_ops,
+ },
+ .probe = sdhci_arasan_probe,
+ .remove = sdhci_arasan_remove,
+};
+
+module_platform_driver(sdhci_arasan_driver);
+
+MODULE_DESCRIPTION("Driver for the Arasan SDHCI Controller");
+MODULE_AUTHOR("Soeren Brinkmann <soren.brinkmann@xilinx.com>");
+MODULE_LICENSE("GPL");