mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-25 09:26:36 +07:00
e5bbf30733
Some devices connected to the SDHCI controller may have separate enabling
lines that are controlled through GPIO. These devices need to be powered
on and enabled before probing. This is to ensure all devices connected can
be seen by the controller.
Note, for "stable" this patch depends on the following change:
commit 78a898d0e3
("ACPI / PM: Export acpi_device_fix_up_power()")
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reported-and-tested-by: Laszlo Fiat <laszlo.fiat@gmail.com>
Cc: <stable@vger.kernel.org> # 4.5+
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reported-by: Laszlo Fiat <laszlo.fiat@gmail.com>
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=112571
Link: http://lkml.kernel.org/r/CA+7w51inLtQSr656bJvOjGG9oQWKYPXH+xxDPJKbeJ=CcrkS9Q@mail.gmail.com
583 lines
14 KiB
C
583 lines
14 KiB
C
/*
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* Secure Digital Host Controller Interface ACPI driver.
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*
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* Copyright (c) 2012, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#include <linux/init.h>
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#include <linux/export.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#include <linux/ioport.h>
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#include <linux/io.h>
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#include <linux/dma-mapping.h>
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#include <linux/compiler.h>
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#include <linux/stddef.h>
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#include <linux/bitops.h>
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#include <linux/types.h>
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#include <linux/err.h>
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#include <linux/interrupt.h>
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#include <linux/acpi.h>
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#include <linux/pm.h>
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#include <linux/pm_runtime.h>
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#include <linux/delay.h>
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#include <linux/mmc/host.h>
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#include <linux/mmc/pm.h>
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#include <linux/mmc/slot-gpio.h>
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#ifdef CONFIG_X86
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#include <asm/cpu_device_id.h>
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#include <asm/iosf_mbi.h>
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#endif
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#include "sdhci.h"
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enum {
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SDHCI_ACPI_SD_CD = BIT(0),
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SDHCI_ACPI_RUNTIME_PM = BIT(1),
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SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL = BIT(2),
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};
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struct sdhci_acpi_chip {
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const struct sdhci_ops *ops;
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unsigned int quirks;
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unsigned int quirks2;
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unsigned long caps;
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unsigned int caps2;
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mmc_pm_flag_t pm_caps;
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};
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struct sdhci_acpi_slot {
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const struct sdhci_acpi_chip *chip;
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unsigned int quirks;
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unsigned int quirks2;
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unsigned long caps;
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unsigned int caps2;
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mmc_pm_flag_t pm_caps;
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unsigned int flags;
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int (*probe_slot)(struct platform_device *, const char *, const char *);
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int (*remove_slot)(struct platform_device *);
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};
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struct sdhci_acpi_host {
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struct sdhci_host *host;
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const struct sdhci_acpi_slot *slot;
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struct platform_device *pdev;
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bool use_runtime_pm;
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};
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static inline bool sdhci_acpi_flag(struct sdhci_acpi_host *c, unsigned int flag)
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{
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return c->slot && (c->slot->flags & flag);
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}
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static void sdhci_acpi_int_hw_reset(struct sdhci_host *host)
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{
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u8 reg;
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reg = sdhci_readb(host, SDHCI_POWER_CONTROL);
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reg |= 0x10;
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sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
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/* For eMMC, minimum is 1us but give it 9us for good measure */
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udelay(9);
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reg &= ~0x10;
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sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
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/* For eMMC, minimum is 200us but give it 300us for good measure */
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usleep_range(300, 1000);
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}
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static const struct sdhci_ops sdhci_acpi_ops_dflt = {
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.set_clock = sdhci_set_clock,
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.set_bus_width = sdhci_set_bus_width,
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.reset = sdhci_reset,
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.set_uhs_signaling = sdhci_set_uhs_signaling,
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};
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static const struct sdhci_ops sdhci_acpi_ops_int = {
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.set_clock = sdhci_set_clock,
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.set_bus_width = sdhci_set_bus_width,
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.reset = sdhci_reset,
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.set_uhs_signaling = sdhci_set_uhs_signaling,
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.hw_reset = sdhci_acpi_int_hw_reset,
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};
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static const struct sdhci_acpi_chip sdhci_acpi_chip_int = {
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.ops = &sdhci_acpi_ops_int,
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};
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#ifdef CONFIG_X86
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static bool sdhci_acpi_byt(void)
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{
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static const struct x86_cpu_id byt[] = {
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{ X86_VENDOR_INTEL, 6, 0x37 },
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{}
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};
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return x86_match_cpu(byt);
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}
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#define BYT_IOSF_SCCEP 0x63
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#define BYT_IOSF_OCP_NETCTRL0 0x1078
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#define BYT_IOSF_OCP_TIMEOUT_BASE GENMASK(10, 8)
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static void sdhci_acpi_byt_setting(struct device *dev)
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{
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u32 val = 0;
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if (!sdhci_acpi_byt())
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return;
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if (iosf_mbi_read(BYT_IOSF_SCCEP, MBI_CR_READ, BYT_IOSF_OCP_NETCTRL0,
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&val)) {
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dev_err(dev, "%s read error\n", __func__);
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return;
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}
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if (!(val & BYT_IOSF_OCP_TIMEOUT_BASE))
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return;
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val &= ~BYT_IOSF_OCP_TIMEOUT_BASE;
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if (iosf_mbi_write(BYT_IOSF_SCCEP, MBI_CR_WRITE, BYT_IOSF_OCP_NETCTRL0,
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val)) {
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dev_err(dev, "%s write error\n", __func__);
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return;
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}
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dev_dbg(dev, "%s completed\n", __func__);
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}
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static bool sdhci_acpi_byt_defer(struct device *dev)
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{
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if (!sdhci_acpi_byt())
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return false;
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if (!iosf_mbi_available())
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return true;
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sdhci_acpi_byt_setting(dev);
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return false;
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}
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#else
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static inline void sdhci_acpi_byt_setting(struct device *dev)
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{
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}
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static inline bool sdhci_acpi_byt_defer(struct device *dev)
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{
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return false;
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}
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#endif
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static int bxt_get_cd(struct mmc_host *mmc)
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{
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int gpio_cd = mmc_gpio_get_cd(mmc);
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struct sdhci_host *host = mmc_priv(mmc);
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unsigned long flags;
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int ret = 0;
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if (!gpio_cd)
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return 0;
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spin_lock_irqsave(&host->lock, flags);
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if (host->flags & SDHCI_DEVICE_DEAD)
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goto out;
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ret = !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
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out:
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spin_unlock_irqrestore(&host->lock, flags);
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return ret;
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}
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static int sdhci_acpi_emmc_probe_slot(struct platform_device *pdev,
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const char *hid, const char *uid)
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{
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struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
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struct sdhci_host *host;
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if (!c || !c->host)
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return 0;
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host = c->host;
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/* Platform specific code during emmc probe slot goes here */
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if (hid && uid && !strcmp(hid, "80860F14") && !strcmp(uid, "1") &&
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sdhci_readl(host, SDHCI_CAPABILITIES) == 0x446cc8b2 &&
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sdhci_readl(host, SDHCI_CAPABILITIES_1) == 0x00000807)
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host->timeout_clk = 1000; /* 1000 kHz i.e. 1 MHz */
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return 0;
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}
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static int sdhci_acpi_sdio_probe_slot(struct platform_device *pdev,
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const char *hid, const char *uid)
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{
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struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
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struct sdhci_host *host;
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if (!c || !c->host)
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return 0;
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host = c->host;
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/* Platform specific code during sdio probe slot goes here */
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return 0;
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}
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static int sdhci_acpi_sd_probe_slot(struct platform_device *pdev,
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const char *hid, const char *uid)
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{
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struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
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struct sdhci_host *host;
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if (!c || !c->host || !c->slot)
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return 0;
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host = c->host;
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/* Platform specific code during sd probe slot goes here */
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if (hid && !strcmp(hid, "80865ACA")) {
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host->mmc_host_ops.get_cd = bxt_get_cd;
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host->mmc->caps |= MMC_CAP_AGGRESSIVE_PM;
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}
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return 0;
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}
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static const struct sdhci_acpi_slot sdhci_acpi_slot_int_emmc = {
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.chip = &sdhci_acpi_chip_int,
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.caps = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE |
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MMC_CAP_HW_RESET | MMC_CAP_1_8V_DDR |
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MMC_CAP_BUS_WIDTH_TEST | MMC_CAP_WAIT_WHILE_BUSY,
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.caps2 = MMC_CAP2_HC_ERASE_SZ,
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.flags = SDHCI_ACPI_RUNTIME_PM,
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.quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
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.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
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SDHCI_QUIRK2_STOP_WITH_TC |
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SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400,
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.probe_slot = sdhci_acpi_emmc_probe_slot,
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};
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static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sdio = {
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.quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION |
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SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
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.quirks2 = SDHCI_QUIRK2_HOST_OFF_CARD_ON,
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.caps = MMC_CAP_NONREMOVABLE | MMC_CAP_POWER_OFF_CARD |
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MMC_CAP_BUS_WIDTH_TEST | MMC_CAP_WAIT_WHILE_BUSY,
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.flags = SDHCI_ACPI_RUNTIME_PM,
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.pm_caps = MMC_PM_KEEP_POWER,
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.probe_slot = sdhci_acpi_sdio_probe_slot,
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};
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static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sd = {
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.flags = SDHCI_ACPI_SD_CD | SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL |
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SDHCI_ACPI_RUNTIME_PM,
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.quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
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.quirks2 = SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON |
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SDHCI_QUIRK2_STOP_WITH_TC,
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.caps = MMC_CAP_BUS_WIDTH_TEST | MMC_CAP_WAIT_WHILE_BUSY,
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.probe_slot = sdhci_acpi_sd_probe_slot,
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};
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static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd_3v = {
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.quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION,
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.quirks2 = SDHCI_QUIRK2_NO_1_8_V,
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.caps = MMC_CAP_NONREMOVABLE,
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};
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static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd = {
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.quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION,
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.caps = MMC_CAP_NONREMOVABLE,
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};
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struct sdhci_acpi_uid_slot {
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const char *hid;
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const char *uid;
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const struct sdhci_acpi_slot *slot;
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};
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static const struct sdhci_acpi_uid_slot sdhci_acpi_uids[] = {
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{ "80865ACA", NULL, &sdhci_acpi_slot_int_sd },
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{ "80865ACC", NULL, &sdhci_acpi_slot_int_emmc },
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{ "80865AD0", NULL, &sdhci_acpi_slot_int_sdio },
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{ "80860F14" , "1" , &sdhci_acpi_slot_int_emmc },
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{ "80860F14" , "3" , &sdhci_acpi_slot_int_sd },
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{ "80860F16" , NULL, &sdhci_acpi_slot_int_sd },
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{ "INT33BB" , "2" , &sdhci_acpi_slot_int_sdio },
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{ "INT33BB" , "3" , &sdhci_acpi_slot_int_sd },
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{ "INT33C6" , NULL, &sdhci_acpi_slot_int_sdio },
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{ "INT3436" , NULL, &sdhci_acpi_slot_int_sdio },
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{ "INT344D" , NULL, &sdhci_acpi_slot_int_sdio },
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{ "PNP0FFF" , "3" , &sdhci_acpi_slot_int_sd },
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{ "PNP0D40" },
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{ "QCOM8051", NULL, &sdhci_acpi_slot_qcom_sd_3v },
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{ "QCOM8052", NULL, &sdhci_acpi_slot_qcom_sd },
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{ },
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};
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static const struct acpi_device_id sdhci_acpi_ids[] = {
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{ "80865ACA" },
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{ "80865ACC" },
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{ "80865AD0" },
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{ "80860F14" },
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{ "80860F16" },
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{ "INT33BB" },
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{ "INT33C6" },
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{ "INT3436" },
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{ "INT344D" },
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{ "PNP0D40" },
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{ "QCOM8051" },
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{ "QCOM8052" },
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{ },
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};
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MODULE_DEVICE_TABLE(acpi, sdhci_acpi_ids);
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static const struct sdhci_acpi_slot *sdhci_acpi_get_slot(const char *hid,
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const char *uid)
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{
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const struct sdhci_acpi_uid_slot *u;
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for (u = sdhci_acpi_uids; u->hid; u++) {
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if (strcmp(u->hid, hid))
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continue;
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if (!u->uid)
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return u->slot;
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if (uid && !strcmp(u->uid, uid))
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return u->slot;
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}
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return NULL;
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}
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static int sdhci_acpi_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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acpi_handle handle = ACPI_HANDLE(dev);
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struct acpi_device *device, *child;
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struct sdhci_acpi_host *c;
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struct sdhci_host *host;
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struct resource *iomem;
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resource_size_t len;
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const char *hid;
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const char *uid;
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int err;
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if (acpi_bus_get_device(handle, &device))
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return -ENODEV;
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/* Power on the SDHCI controller and its children */
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acpi_device_fix_up_power(device);
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list_for_each_entry(child, &device->children, node)
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acpi_device_fix_up_power(child);
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if (acpi_bus_get_status(device) || !device->status.present)
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return -ENODEV;
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if (sdhci_acpi_byt_defer(dev))
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return -EPROBE_DEFER;
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hid = acpi_device_hid(device);
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uid = device->pnp.unique_id;
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iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!iomem)
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return -ENOMEM;
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len = resource_size(iomem);
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if (len < 0x100)
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dev_err(dev, "Invalid iomem size!\n");
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if (!devm_request_mem_region(dev, iomem->start, len, dev_name(dev)))
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return -ENOMEM;
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host = sdhci_alloc_host(dev, sizeof(struct sdhci_acpi_host));
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if (IS_ERR(host))
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return PTR_ERR(host);
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c = sdhci_priv(host);
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c->host = host;
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c->slot = sdhci_acpi_get_slot(hid, uid);
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c->pdev = pdev;
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c->use_runtime_pm = sdhci_acpi_flag(c, SDHCI_ACPI_RUNTIME_PM);
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platform_set_drvdata(pdev, c);
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host->hw_name = "ACPI";
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host->ops = &sdhci_acpi_ops_dflt;
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host->irq = platform_get_irq(pdev, 0);
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host->ioaddr = devm_ioremap_nocache(dev, iomem->start,
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resource_size(iomem));
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if (host->ioaddr == NULL) {
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err = -ENOMEM;
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goto err_free;
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}
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if (c->slot) {
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if (c->slot->probe_slot) {
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err = c->slot->probe_slot(pdev, hid, uid);
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if (err)
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goto err_free;
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}
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if (c->slot->chip) {
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host->ops = c->slot->chip->ops;
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host->quirks |= c->slot->chip->quirks;
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host->quirks2 |= c->slot->chip->quirks2;
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host->mmc->caps |= c->slot->chip->caps;
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host->mmc->caps2 |= c->slot->chip->caps2;
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host->mmc->pm_caps |= c->slot->chip->pm_caps;
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}
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|
host->quirks |= c->slot->quirks;
|
|
host->quirks2 |= c->slot->quirks2;
|
|
host->mmc->caps |= c->slot->caps;
|
|
host->mmc->caps2 |= c->slot->caps2;
|
|
host->mmc->pm_caps |= c->slot->pm_caps;
|
|
}
|
|
|
|
host->mmc->caps2 |= MMC_CAP2_NO_PRESCAN_POWERUP;
|
|
|
|
if (sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD)) {
|
|
bool v = sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL);
|
|
|
|
if (mmc_gpiod_request_cd(host->mmc, NULL, 0, v, 0, NULL)) {
|
|
dev_warn(dev, "failed to setup card detect gpio\n");
|
|
c->use_runtime_pm = false;
|
|
}
|
|
}
|
|
|
|
err = sdhci_add_host(host);
|
|
if (err)
|
|
goto err_free;
|
|
|
|
if (c->use_runtime_pm) {
|
|
pm_runtime_set_active(dev);
|
|
pm_suspend_ignore_children(dev, 1);
|
|
pm_runtime_set_autosuspend_delay(dev, 50);
|
|
pm_runtime_use_autosuspend(dev);
|
|
pm_runtime_enable(dev);
|
|
}
|
|
|
|
device_enable_async_suspend(dev);
|
|
|
|
return 0;
|
|
|
|
err_free:
|
|
sdhci_free_host(c->host);
|
|
return err;
|
|
}
|
|
|
|
static int sdhci_acpi_remove(struct platform_device *pdev)
|
|
{
|
|
struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
|
|
struct device *dev = &pdev->dev;
|
|
int dead;
|
|
|
|
if (c->use_runtime_pm) {
|
|
pm_runtime_get_sync(dev);
|
|
pm_runtime_disable(dev);
|
|
pm_runtime_put_noidle(dev);
|
|
}
|
|
|
|
if (c->slot && c->slot->remove_slot)
|
|
c->slot->remove_slot(pdev);
|
|
|
|
dead = (sdhci_readl(c->host, SDHCI_INT_STATUS) == ~0);
|
|
sdhci_remove_host(c->host, dead);
|
|
sdhci_free_host(c->host);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
|
|
static int sdhci_acpi_suspend(struct device *dev)
|
|
{
|
|
struct sdhci_acpi_host *c = dev_get_drvdata(dev);
|
|
|
|
return sdhci_suspend_host(c->host);
|
|
}
|
|
|
|
static int sdhci_acpi_resume(struct device *dev)
|
|
{
|
|
struct sdhci_acpi_host *c = dev_get_drvdata(dev);
|
|
|
|
sdhci_acpi_byt_setting(&c->pdev->dev);
|
|
|
|
return sdhci_resume_host(c->host);
|
|
}
|
|
|
|
#else
|
|
|
|
#define sdhci_acpi_suspend NULL
|
|
#define sdhci_acpi_resume NULL
|
|
|
|
#endif
|
|
|
|
#ifdef CONFIG_PM
|
|
|
|
static int sdhci_acpi_runtime_suspend(struct device *dev)
|
|
{
|
|
struct sdhci_acpi_host *c = dev_get_drvdata(dev);
|
|
|
|
return sdhci_runtime_suspend_host(c->host);
|
|
}
|
|
|
|
static int sdhci_acpi_runtime_resume(struct device *dev)
|
|
{
|
|
struct sdhci_acpi_host *c = dev_get_drvdata(dev);
|
|
|
|
sdhci_acpi_byt_setting(&c->pdev->dev);
|
|
|
|
return sdhci_runtime_resume_host(c->host);
|
|
}
|
|
|
|
#endif
|
|
|
|
static const struct dev_pm_ops sdhci_acpi_pm_ops = {
|
|
.suspend = sdhci_acpi_suspend,
|
|
.resume = sdhci_acpi_resume,
|
|
SET_RUNTIME_PM_OPS(sdhci_acpi_runtime_suspend,
|
|
sdhci_acpi_runtime_resume, NULL)
|
|
};
|
|
|
|
static struct platform_driver sdhci_acpi_driver = {
|
|
.driver = {
|
|
.name = "sdhci-acpi",
|
|
.acpi_match_table = sdhci_acpi_ids,
|
|
.pm = &sdhci_acpi_pm_ops,
|
|
},
|
|
.probe = sdhci_acpi_probe,
|
|
.remove = sdhci_acpi_remove,
|
|
};
|
|
|
|
module_platform_driver(sdhci_acpi_driver);
|
|
|
|
MODULE_DESCRIPTION("Secure Digital Host Controller Interface ACPI driver");
|
|
MODULE_AUTHOR("Adrian Hunter");
|
|
MODULE_LICENSE("GPL v2");
|