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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-acpi.c
parentInitial commit. (diff)
downloadlinux-upstream.tar.xz
linux-upstream.zip
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/mmc/host/sdhci-acpi.c')
-rw-r--r--drivers/mmc/host/sdhci-acpi.c1043
1 files changed, 1043 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-acpi.c b/drivers/mmc/host/sdhci-acpi.c
new file mode 100644
index 000000000..b917060a2
--- /dev/null
+++ b/drivers/mmc/host/sdhci-acpi.c
@@ -0,0 +1,1043 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Secure Digital Host Controller Interface ACPI driver.
+ *
+ * Copyright (c) 2012, Intel Corporation.
+ */
+
+#include <linux/bitfield.h>
+#include <linux/init.h>
+#include <linux/export.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/ioport.h>
+#include <linux/io.h>
+#include <linux/dma-mapping.h>
+#include <linux/compiler.h>
+#include <linux/stddef.h>
+#include <linux/bitops.h>
+#include <linux/types.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/acpi.h>
+#include <linux/pm.h>
+#include <linux/pm_runtime.h>
+#include <linux/delay.h>
+#include <linux/dmi.h>
+
+#include <linux/mmc/host.h>
+#include <linux/mmc/pm.h>
+#include <linux/mmc/slot-gpio.h>
+
+#ifdef CONFIG_X86
+#include <linux/platform_data/x86/soc.h>
+#include <asm/iosf_mbi.h>
+#endif
+
+#include "sdhci.h"
+
+enum {
+ SDHCI_ACPI_SD_CD = BIT(0),
+ SDHCI_ACPI_RUNTIME_PM = BIT(1),
+ SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL = BIT(2),
+};
+
+struct sdhci_acpi_chip {
+ const struct sdhci_ops *ops;
+ unsigned int quirks;
+ unsigned int quirks2;
+ unsigned long caps;
+ unsigned int caps2;
+ mmc_pm_flag_t pm_caps;
+};
+
+struct sdhci_acpi_slot {
+ const struct sdhci_acpi_chip *chip;
+ unsigned int quirks;
+ unsigned int quirks2;
+ unsigned long caps;
+ unsigned int caps2;
+ mmc_pm_flag_t pm_caps;
+ unsigned int flags;
+ size_t priv_size;
+ int (*probe_slot)(struct platform_device *, struct acpi_device *);
+ int (*remove_slot)(struct platform_device *);
+ int (*free_slot)(struct platform_device *pdev);
+ int (*setup_host)(struct platform_device *pdev);
+};
+
+struct sdhci_acpi_host {
+ struct sdhci_host *host;
+ const struct sdhci_acpi_slot *slot;
+ struct platform_device *pdev;
+ bool use_runtime_pm;
+ bool is_intel;
+ bool reset_signal_volt_on_suspend;
+ unsigned long private[] ____cacheline_aligned;
+};
+
+enum {
+ DMI_QUIRK_RESET_SD_SIGNAL_VOLT_ON_SUSP = BIT(0),
+ DMI_QUIRK_SD_NO_WRITE_PROTECT = BIT(1),
+};
+
+static inline void *sdhci_acpi_priv(struct sdhci_acpi_host *c)
+{
+ return (void *)c->private;
+}
+
+static inline bool sdhci_acpi_flag(struct sdhci_acpi_host *c, unsigned int flag)
+{
+ return c->slot && (c->slot->flags & flag);
+}
+
+#define INTEL_DSM_HS_CAPS_SDR25 BIT(0)
+#define INTEL_DSM_HS_CAPS_DDR50 BIT(1)
+#define INTEL_DSM_HS_CAPS_SDR50 BIT(2)
+#define INTEL_DSM_HS_CAPS_SDR104 BIT(3)
+
+enum {
+ INTEL_DSM_FNS = 0,
+ INTEL_DSM_V18_SWITCH = 3,
+ INTEL_DSM_V33_SWITCH = 4,
+ INTEL_DSM_HS_CAPS = 8,
+};
+
+struct intel_host {
+ u32 dsm_fns;
+ u32 hs_caps;
+};
+
+static const guid_t intel_dsm_guid =
+ GUID_INIT(0xF6C13EA5, 0x65CD, 0x461F,
+ 0xAB, 0x7A, 0x29, 0xF7, 0xE8, 0xD5, 0xBD, 0x61);
+
+static int __intel_dsm(struct intel_host *intel_host, struct device *dev,
+ unsigned int fn, u32 *result)
+{
+ union acpi_object *obj;
+ int err = 0;
+
+ obj = acpi_evaluate_dsm(ACPI_HANDLE(dev), &intel_dsm_guid, 0, fn, NULL);
+ if (!obj)
+ return -EOPNOTSUPP;
+
+ if (obj->type == ACPI_TYPE_INTEGER) {
+ *result = obj->integer.value;
+ } else if (obj->type == ACPI_TYPE_BUFFER && obj->buffer.length > 0) {
+ size_t len = min_t(size_t, obj->buffer.length, 4);
+
+ *result = 0;
+ memcpy(result, obj->buffer.pointer, len);
+ } else {
+ dev_err(dev, "%s DSM fn %u obj->type %d obj->buffer.length %d\n",
+ __func__, fn, obj->type, obj->buffer.length);
+ err = -EINVAL;
+ }
+
+ ACPI_FREE(obj);
+
+ return err;
+}
+
+static int intel_dsm(struct intel_host *intel_host, struct device *dev,
+ unsigned int fn, u32 *result)
+{
+ if (fn > 31 || !(intel_host->dsm_fns & (1 << fn)))
+ return -EOPNOTSUPP;
+
+ return __intel_dsm(intel_host, dev, fn, result);
+}
+
+static void intel_dsm_init(struct intel_host *intel_host, struct device *dev,
+ struct mmc_host *mmc)
+{
+ int err;
+
+ intel_host->hs_caps = ~0;
+
+ err = __intel_dsm(intel_host, dev, INTEL_DSM_FNS, &intel_host->dsm_fns);
+ if (err) {
+ pr_debug("%s: DSM not supported, error %d\n",
+ mmc_hostname(mmc), err);
+ return;
+ }
+
+ pr_debug("%s: DSM function mask %#x\n",
+ mmc_hostname(mmc), intel_host->dsm_fns);
+
+ intel_dsm(intel_host, dev, INTEL_DSM_HS_CAPS, &intel_host->hs_caps);
+}
+
+static int intel_start_signal_voltage_switch(struct mmc_host *mmc,
+ struct mmc_ios *ios)
+{
+ struct device *dev = mmc_dev(mmc);
+ struct sdhci_acpi_host *c = dev_get_drvdata(dev);
+ struct intel_host *intel_host = sdhci_acpi_priv(c);
+ unsigned int fn;
+ u32 result = 0;
+ int err;
+
+ err = sdhci_start_signal_voltage_switch(mmc, ios);
+ if (err)
+ return err;
+
+ switch (ios->signal_voltage) {
+ case MMC_SIGNAL_VOLTAGE_330:
+ fn = INTEL_DSM_V33_SWITCH;
+ break;
+ case MMC_SIGNAL_VOLTAGE_180:
+ fn = INTEL_DSM_V18_SWITCH;
+ break;
+ default:
+ return 0;
+ }
+
+ err = intel_dsm(intel_host, dev, fn, &result);
+ pr_debug("%s: %s DSM fn %u error %d result %u\n",
+ mmc_hostname(mmc), __func__, fn, err, result);
+
+ return 0;
+}
+
+static void sdhci_acpi_int_hw_reset(struct sdhci_host *host)
+{
+ u8 reg;
+
+ reg = sdhci_readb(host, SDHCI_POWER_CONTROL);
+ reg |= 0x10;
+ sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
+ /* For eMMC, minimum is 1us but give it 9us for good measure */
+ udelay(9);
+ reg &= ~0x10;
+ sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
+ /* For eMMC, minimum is 200us but give it 300us for good measure */
+ usleep_range(300, 1000);
+}
+
+static const struct sdhci_ops sdhci_acpi_ops_dflt = {
+ .set_clock = sdhci_set_clock,
+ .set_bus_width = sdhci_set_bus_width,
+ .reset = sdhci_reset,
+ .set_uhs_signaling = sdhci_set_uhs_signaling,
+};
+
+static const struct sdhci_ops sdhci_acpi_ops_int = {
+ .set_clock = sdhci_set_clock,
+ .set_bus_width = sdhci_set_bus_width,
+ .reset = sdhci_reset,
+ .set_uhs_signaling = sdhci_set_uhs_signaling,
+ .hw_reset = sdhci_acpi_int_hw_reset,
+};
+
+static const struct sdhci_acpi_chip sdhci_acpi_chip_int = {
+ .ops = &sdhci_acpi_ops_int,
+};
+
+#ifdef CONFIG_X86
+
+#define BYT_IOSF_SCCEP 0x63
+#define BYT_IOSF_OCP_NETCTRL0 0x1078
+#define BYT_IOSF_OCP_TIMEOUT_BASE GENMASK(10, 8)
+
+static void sdhci_acpi_byt_setting(struct device *dev)
+{
+ u32 val = 0;
+
+ if (!soc_intel_is_byt())
+ return;
+
+ if (iosf_mbi_read(BYT_IOSF_SCCEP, MBI_CR_READ, BYT_IOSF_OCP_NETCTRL0,
+ &val)) {
+ dev_err(dev, "%s read error\n", __func__);
+ return;
+ }
+
+ if (!(val & BYT_IOSF_OCP_TIMEOUT_BASE))
+ return;
+
+ val &= ~BYT_IOSF_OCP_TIMEOUT_BASE;
+
+ if (iosf_mbi_write(BYT_IOSF_SCCEP, MBI_CR_WRITE, BYT_IOSF_OCP_NETCTRL0,
+ val)) {
+ dev_err(dev, "%s write error\n", __func__);
+ return;
+ }
+
+ dev_dbg(dev, "%s completed\n", __func__);
+}
+
+static bool sdhci_acpi_byt_defer(struct device *dev)
+{
+ if (!soc_intel_is_byt())
+ return false;
+
+ if (!iosf_mbi_available())
+ return true;
+
+ sdhci_acpi_byt_setting(dev);
+
+ return false;
+}
+
+#else
+
+static inline void sdhci_acpi_byt_setting(struct device *dev)
+{
+}
+
+static inline bool sdhci_acpi_byt_defer(struct device *dev)
+{
+ return false;
+}
+
+#endif
+
+static int bxt_get_cd(struct mmc_host *mmc)
+{
+ int gpio_cd = mmc_gpio_get_cd(mmc);
+
+ if (!gpio_cd)
+ return 0;
+
+ return sdhci_get_cd_nogpio(mmc);
+}
+
+static int intel_probe_slot(struct platform_device *pdev, struct acpi_device *adev)
+{
+ struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
+ struct intel_host *intel_host = sdhci_acpi_priv(c);
+ struct sdhci_host *host = c->host;
+
+ if (acpi_dev_hid_uid_match(adev, "80860F14", "1") &&
+ sdhci_readl(host, SDHCI_CAPABILITIES) == 0x446cc8b2 &&
+ sdhci_readl(host, SDHCI_CAPABILITIES_1) == 0x00000807)
+ host->timeout_clk = 1000; /* 1000 kHz i.e. 1 MHz */
+
+ if (acpi_dev_hid_uid_match(adev, "80865ACA", NULL))
+ host->mmc_host_ops.get_cd = bxt_get_cd;
+
+ intel_dsm_init(intel_host, &pdev->dev, host->mmc);
+
+ host->mmc_host_ops.start_signal_voltage_switch =
+ intel_start_signal_voltage_switch;
+
+ c->is_intel = true;
+
+ return 0;
+}
+
+static int intel_setup_host(struct platform_device *pdev)
+{
+ struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
+ struct intel_host *intel_host = sdhci_acpi_priv(c);
+
+ if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_SDR25))
+ c->host->mmc->caps &= ~MMC_CAP_UHS_SDR25;
+
+ if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_SDR50))
+ c->host->mmc->caps &= ~MMC_CAP_UHS_SDR50;
+
+ if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_DDR50))
+ c->host->mmc->caps &= ~MMC_CAP_UHS_DDR50;
+
+ if (!(intel_host->hs_caps & INTEL_DSM_HS_CAPS_SDR104))
+ c->host->mmc->caps &= ~MMC_CAP_UHS_SDR104;
+
+ return 0;
+}
+
+static const struct sdhci_acpi_slot sdhci_acpi_slot_int_emmc = {
+ .chip = &sdhci_acpi_chip_int,
+ .caps = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE |
+ MMC_CAP_HW_RESET | MMC_CAP_1_8V_DDR |
+ MMC_CAP_CMD_DURING_TFR | MMC_CAP_WAIT_WHILE_BUSY,
+ .flags = SDHCI_ACPI_RUNTIME_PM,
+ .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
+ SDHCI_QUIRK_NO_LED,
+ .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
+ SDHCI_QUIRK2_STOP_WITH_TC |
+ SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400,
+ .probe_slot = intel_probe_slot,
+ .setup_host = intel_setup_host,
+ .priv_size = sizeof(struct intel_host),
+};
+
+static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sdio = {
+ .quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION |
+ SDHCI_QUIRK_NO_LED |
+ SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
+ .quirks2 = SDHCI_QUIRK2_HOST_OFF_CARD_ON,
+ .caps = MMC_CAP_NONREMOVABLE | MMC_CAP_POWER_OFF_CARD |
+ MMC_CAP_WAIT_WHILE_BUSY,
+ .flags = SDHCI_ACPI_RUNTIME_PM,
+ .pm_caps = MMC_PM_KEEP_POWER,
+ .probe_slot = intel_probe_slot,
+ .setup_host = intel_setup_host,
+ .priv_size = sizeof(struct intel_host),
+};
+
+static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sd = {
+ .flags = SDHCI_ACPI_SD_CD | SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL |
+ SDHCI_ACPI_RUNTIME_PM,
+ .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
+ SDHCI_QUIRK_NO_LED,
+ .quirks2 = SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON |
+ SDHCI_QUIRK2_STOP_WITH_TC,
+ .caps = MMC_CAP_WAIT_WHILE_BUSY | MMC_CAP_AGGRESSIVE_PM,
+ .probe_slot = intel_probe_slot,
+ .setup_host = intel_setup_host,
+ .priv_size = sizeof(struct intel_host),
+};
+
+#define VENDOR_SPECIFIC_PWRCTL_CLEAR_REG 0x1a8
+#define VENDOR_SPECIFIC_PWRCTL_CTL_REG 0x1ac
+static irqreturn_t sdhci_acpi_qcom_handler(int irq, void *ptr)
+{
+ struct sdhci_host *host = ptr;
+
+ sdhci_writel(host, 0x3, VENDOR_SPECIFIC_PWRCTL_CLEAR_REG);
+ sdhci_writel(host, 0x1, VENDOR_SPECIFIC_PWRCTL_CTL_REG);
+
+ return IRQ_HANDLED;
+}
+
+static int qcom_probe_slot(struct platform_device *pdev, struct acpi_device *adev)
+{
+ struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
+ struct sdhci_host *host = c->host;
+ int *irq = sdhci_acpi_priv(c);
+
+ *irq = -EINVAL;
+
+ if (!acpi_dev_hid_uid_match(adev, "QCOM8051", NULL))
+ return 0;
+
+ *irq = platform_get_irq(pdev, 1);
+ if (*irq < 0)
+ return 0;
+
+ return request_threaded_irq(*irq, NULL, sdhci_acpi_qcom_handler,
+ IRQF_ONESHOT | IRQF_TRIGGER_HIGH,
+ "sdhci_qcom", host);
+}
+
+static int qcom_free_slot(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
+ struct sdhci_host *host = c->host;
+ struct acpi_device *adev;
+ int *irq = sdhci_acpi_priv(c);
+
+ adev = ACPI_COMPANION(dev);
+ if (!adev)
+ return -ENODEV;
+
+ if (!acpi_dev_hid_uid_match(adev, "QCOM8051", NULL))
+ return 0;
+
+ if (*irq < 0)
+ return 0;
+
+ free_irq(*irq, host);
+ return 0;
+}
+
+static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd_3v = {
+ .quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION,
+ .quirks2 = SDHCI_QUIRK2_NO_1_8_V,
+ .caps = MMC_CAP_NONREMOVABLE,
+ .priv_size = sizeof(int),
+ .probe_slot = qcom_probe_slot,
+ .free_slot = qcom_free_slot,
+};
+
+static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd = {
+ .quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION,
+ .caps = MMC_CAP_NONREMOVABLE,
+};
+
+struct amd_sdhci_host {
+ bool tuned_clock;
+ bool dll_enabled;
+};
+
+/* AMD sdhci reset dll register. */
+#define SDHCI_AMD_RESET_DLL_REGISTER 0x908
+
+static int amd_select_drive_strength(struct mmc_card *card,
+ unsigned int max_dtr, int host_drv,
+ int card_drv, int *host_driver_strength)
+{
+ struct sdhci_host *host = mmc_priv(card->host);
+ u16 preset, preset_driver_strength;
+
+ /*
+ * This method is only called by mmc_select_hs200 so we only need to
+ * read from the HS200 (SDR104) preset register.
+ *
+ * Firmware that has "invalid/default" presets return a driver strength
+ * of A. This matches the previously hard coded value.
+ */
+ preset = sdhci_readw(host, SDHCI_PRESET_FOR_SDR104);
+ preset_driver_strength = FIELD_GET(SDHCI_PRESET_DRV_MASK, preset);
+
+ /*
+ * We want the controller driver strength to match the card's driver
+ * strength so they have similar rise/fall times.
+ *
+ * The controller driver strength set by this method is sticky for all
+ * timings after this method is called. This unfortunately means that
+ * while HS400 tuning is in progress we end up with mismatched driver
+ * strengths between the controller and the card. HS400 tuning requires
+ * switching from HS400->DDR52->HS->HS200->HS400. So the driver mismatch
+ * happens while in DDR52 and HS modes. This has not been observed to
+ * cause problems. Enabling presets would fix this issue.
+ */
+ *host_driver_strength = preset_driver_strength;
+
+ /*
+ * The resulting card driver strength is only set when switching the
+ * card's timing to HS200 or HS400. The card will use the default driver
+ * strength (B) for any other mode.
+ */
+ return preset_driver_strength;
+}
+
+static void sdhci_acpi_amd_hs400_dll(struct sdhci_host *host, bool enable)
+{
+ struct sdhci_acpi_host *acpi_host = sdhci_priv(host);
+ struct amd_sdhci_host *amd_host = sdhci_acpi_priv(acpi_host);
+
+ /* AMD Platform requires dll setting */
+ sdhci_writel(host, 0x40003210, SDHCI_AMD_RESET_DLL_REGISTER);
+ usleep_range(10, 20);
+ if (enable)
+ sdhci_writel(host, 0x40033210, SDHCI_AMD_RESET_DLL_REGISTER);
+
+ amd_host->dll_enabled = enable;
+}
+
+/*
+ * The initialization sequence for HS400 is:
+ * HS->HS200->Perform Tuning->HS->HS400
+ *
+ * The re-tuning sequence is:
+ * HS400->DDR52->HS->HS200->Perform Tuning->HS->HS400
+ *
+ * The AMD eMMC Controller can only use the tuned clock while in HS200 and HS400
+ * mode. If we switch to a different mode, we need to disable the tuned clock.
+ * If we have previously performed tuning and switch back to HS200 or
+ * HS400, we can re-enable the tuned clock.
+ *
+ */
+static void amd_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+ struct sdhci_acpi_host *acpi_host = sdhci_priv(host);
+ struct amd_sdhci_host *amd_host = sdhci_acpi_priv(acpi_host);
+ unsigned int old_timing = host->timing;
+ u16 val;
+
+ sdhci_set_ios(mmc, ios);
+
+ if (old_timing != host->timing && amd_host->tuned_clock) {
+ if (host->timing == MMC_TIMING_MMC_HS400 ||
+ host->timing == MMC_TIMING_MMC_HS200) {
+ val = sdhci_readw(host, SDHCI_HOST_CONTROL2);
+ val |= SDHCI_CTRL_TUNED_CLK;
+ sdhci_writew(host, val, SDHCI_HOST_CONTROL2);
+ } else {
+ val = sdhci_readw(host, SDHCI_HOST_CONTROL2);
+ val &= ~SDHCI_CTRL_TUNED_CLK;
+ sdhci_writew(host, val, SDHCI_HOST_CONTROL2);
+ }
+
+ /* DLL is only required for HS400 */
+ if (host->timing == MMC_TIMING_MMC_HS400 &&
+ !amd_host->dll_enabled)
+ sdhci_acpi_amd_hs400_dll(host, true);
+ }
+}
+
+static int amd_sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode)
+{
+ int err;
+ struct sdhci_host *host = mmc_priv(mmc);
+ struct sdhci_acpi_host *acpi_host = sdhci_priv(host);
+ struct amd_sdhci_host *amd_host = sdhci_acpi_priv(acpi_host);
+
+ amd_host->tuned_clock = false;
+
+ err = sdhci_execute_tuning(mmc, opcode);
+
+ if (!err && !host->tuning_err)
+ amd_host->tuned_clock = true;
+
+ return err;
+}
+
+static void amd_sdhci_reset(struct sdhci_host *host, u8 mask)
+{
+ struct sdhci_acpi_host *acpi_host = sdhci_priv(host);
+ struct amd_sdhci_host *amd_host = sdhci_acpi_priv(acpi_host);
+
+ if (mask & SDHCI_RESET_ALL) {
+ amd_host->tuned_clock = false;
+ sdhci_acpi_amd_hs400_dll(host, false);
+ }
+
+ sdhci_reset(host, mask);
+}
+
+static const struct sdhci_ops sdhci_acpi_ops_amd = {
+ .set_clock = sdhci_set_clock,
+ .set_bus_width = sdhci_set_bus_width,
+ .reset = amd_sdhci_reset,
+ .set_uhs_signaling = sdhci_set_uhs_signaling,
+};
+
+static const struct sdhci_acpi_chip sdhci_acpi_chip_amd = {
+ .ops = &sdhci_acpi_ops_amd,
+};
+
+static int sdhci_acpi_emmc_amd_probe_slot(struct platform_device *pdev,
+ struct acpi_device *adev)
+{
+ struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
+ struct sdhci_host *host = c->host;
+
+ sdhci_read_caps(host);
+ if (host->caps1 & SDHCI_SUPPORT_DDR50)
+ host->mmc->caps = MMC_CAP_1_8V_DDR;
+
+ if ((host->caps1 & SDHCI_SUPPORT_SDR104) &&
+ (host->mmc->caps & MMC_CAP_1_8V_DDR))
+ host->mmc->caps2 = MMC_CAP2_HS400_1_8V;
+
+ /*
+ * There are two types of presets out in the wild:
+ * 1) Default/broken presets.
+ * These presets have two sets of problems:
+ * a) The clock divisor for SDR12, SDR25, and SDR50 is too small.
+ * This results in clock frequencies that are 2x higher than
+ * acceptable. i.e., SDR12 = 25 MHz, SDR25 = 50 MHz, SDR50 =
+ * 100 MHz.x
+ * b) The HS200 and HS400 driver strengths don't match.
+ * By default, the SDR104 preset register has a driver strength of
+ * A, but the (internal) HS400 preset register has a driver
+ * strength of B. As part of initializing HS400, HS200 tuning
+ * needs to be performed. Having different driver strengths
+ * between tuning and operation is wrong. It results in different
+ * rise/fall times that lead to incorrect sampling.
+ * 2) Firmware with properly initialized presets.
+ * These presets have proper clock divisors. i.e., SDR12 => 12MHz,
+ * SDR25 => 25 MHz, SDR50 => 50 MHz. Additionally the HS200 and
+ * HS400 preset driver strengths match.
+ *
+ * Enabling presets for HS400 doesn't work for the following reasons:
+ * 1) sdhci_set_ios has a hard coded list of timings that are used
+ * to determine if presets should be enabled.
+ * 2) sdhci_get_preset_value is using a non-standard register to
+ * read out HS400 presets. The AMD controller doesn't support this
+ * non-standard register. In fact, it doesn't expose the HS400
+ * preset register anywhere in the SDHCI memory map. This results
+ * in reading a garbage value and using the wrong presets.
+ *
+ * Since HS400 and HS200 presets must be identical, we could
+ * instead use the the SDR104 preset register.
+ *
+ * If the above issues are resolved we could remove this quirk for
+ * firmware that that has valid presets (i.e., SDR12 <= 12 MHz).
+ */
+ host->quirks2 |= SDHCI_QUIRK2_PRESET_VALUE_BROKEN;
+
+ host->mmc_host_ops.select_drive_strength = amd_select_drive_strength;
+ host->mmc_host_ops.set_ios = amd_set_ios;
+ host->mmc_host_ops.execute_tuning = amd_sdhci_execute_tuning;
+ return 0;
+}
+
+static const struct sdhci_acpi_slot sdhci_acpi_slot_amd_emmc = {
+ .chip = &sdhci_acpi_chip_amd,
+ .caps = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE,
+ .quirks = SDHCI_QUIRK_32BIT_DMA_ADDR |
+ SDHCI_QUIRK_32BIT_DMA_SIZE |
+ SDHCI_QUIRK_32BIT_ADMA_SIZE,
+ .quirks2 = SDHCI_QUIRK2_BROKEN_64_BIT_DMA,
+ .probe_slot = sdhci_acpi_emmc_amd_probe_slot,
+ .priv_size = sizeof(struct amd_sdhci_host),
+};
+
+struct sdhci_acpi_uid_slot {
+ const char *hid;
+ const char *uid;
+ const struct sdhci_acpi_slot *slot;
+};
+
+static const struct sdhci_acpi_uid_slot sdhci_acpi_uids[] = {
+ { "80865ACA", NULL, &sdhci_acpi_slot_int_sd },
+ { "80865ACC", NULL, &sdhci_acpi_slot_int_emmc },
+ { "80865AD0", NULL, &sdhci_acpi_slot_int_sdio },
+ { "80860F14" , "1" , &sdhci_acpi_slot_int_emmc },
+ { "80860F14" , "2" , &sdhci_acpi_slot_int_sdio },
+ { "80860F14" , "3" , &sdhci_acpi_slot_int_sd },
+ { "80860F16" , NULL, &sdhci_acpi_slot_int_sd },
+ { "INT33BB" , "2" , &sdhci_acpi_slot_int_sdio },
+ { "INT33BB" , "3" , &sdhci_acpi_slot_int_sd },
+ { "INT33C6" , NULL, &sdhci_acpi_slot_int_sdio },
+ { "INT3436" , NULL, &sdhci_acpi_slot_int_sdio },
+ { "INT344D" , NULL, &sdhci_acpi_slot_int_sdio },
+ { "PNP0FFF" , "3" , &sdhci_acpi_slot_int_sd },
+ { "PNP0D40" },
+ { "QCOM8051", NULL, &sdhci_acpi_slot_qcom_sd_3v },
+ { "QCOM8052", NULL, &sdhci_acpi_slot_qcom_sd },
+ { "AMDI0040", NULL, &sdhci_acpi_slot_amd_emmc },
+ { "AMDI0041", NULL, &sdhci_acpi_slot_amd_emmc },
+ { },
+};
+
+static const struct acpi_device_id sdhci_acpi_ids[] = {
+ { "80865ACA" },
+ { "80865ACC" },
+ { "80865AD0" },
+ { "80860F14" },
+ { "80860F16" },
+ { "INT33BB" },
+ { "INT33C6" },
+ { "INT3436" },
+ { "INT344D" },
+ { "PNP0D40" },
+ { "QCOM8051" },
+ { "QCOM8052" },
+ { "AMDI0040" },
+ { "AMDI0041" },
+ { },
+};
+MODULE_DEVICE_TABLE(acpi, sdhci_acpi_ids);
+
+static const struct dmi_system_id sdhci_acpi_quirks[] = {
+ {
+ /*
+ * The Lenovo Miix 320-10ICR has a bug in the _PS0 method of
+ * the SHC1 ACPI device, this bug causes it to reprogram the
+ * wrong LDO (DLDO3) to 1.8V if 1.8V modes are used and the
+ * card is (runtime) suspended + resumed. DLDO3 is used for
+ * the LCD and setting it to 1.8V causes the LCD to go black.
+ */
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo MIIX 320-10ICR"),
+ },
+ .driver_data = (void *)DMI_QUIRK_RESET_SD_SIGNAL_VOLT_ON_SUSP,
+ },
+ {
+ /*
+ * The Acer Aspire Switch 10 (SW5-012) microSD slot always
+ * reports the card being write-protected even though microSD
+ * cards do not have a write-protect switch at all.
+ */
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Aspire SW5-012"),
+ },
+ .driver_data = (void *)DMI_QUIRK_SD_NO_WRITE_PROTECT,
+ },
+ {
+ /*
+ * The Toshiba WT8-B's microSD slot always reports the card being
+ * write-protected.
+ */
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "TOSHIBA ENCORE 2 WT8-B"),
+ },
+ .driver_data = (void *)DMI_QUIRK_SD_NO_WRITE_PROTECT,
+ },
+ {} /* Terminating entry */
+};
+
+static const struct sdhci_acpi_slot *sdhci_acpi_get_slot(struct acpi_device *adev)
+{
+ const struct sdhci_acpi_uid_slot *u;
+
+ for (u = sdhci_acpi_uids; u->hid; u++) {
+ if (acpi_dev_hid_uid_match(adev, u->hid, u->uid))
+ return u->slot;
+ }
+ return NULL;
+}
+
+static int sdhci_acpi_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ const struct sdhci_acpi_slot *slot;
+ const struct dmi_system_id *id;
+ struct acpi_device *device;
+ struct sdhci_acpi_host *c;
+ struct sdhci_host *host;
+ struct resource *iomem;
+ resource_size_t len;
+ size_t priv_size;
+ int quirks = 0;
+ int err;
+
+ device = ACPI_COMPANION(dev);
+ if (!device)
+ return -ENODEV;
+
+ id = dmi_first_match(sdhci_acpi_quirks);
+ if (id)
+ quirks = (long)id->driver_data;
+
+ slot = sdhci_acpi_get_slot(device);
+
+ /* Power on the SDHCI controller and its children */
+ acpi_device_fix_up_power_extended(device);
+
+ if (sdhci_acpi_byt_defer(dev))
+ return -EPROBE_DEFER;
+
+ iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!iomem)
+ return -ENOMEM;
+
+ len = resource_size(iomem);
+ if (len < 0x100)
+ dev_err(dev, "Invalid iomem size!\n");
+
+ if (!devm_request_mem_region(dev, iomem->start, len, dev_name(dev)))
+ return -ENOMEM;
+
+ priv_size = slot ? slot->priv_size : 0;
+ host = sdhci_alloc_host(dev, sizeof(struct sdhci_acpi_host) + priv_size);
+ if (IS_ERR(host))
+ return PTR_ERR(host);
+
+ c = sdhci_priv(host);
+ c->host = host;
+ c->slot = slot;
+ c->pdev = pdev;
+ c->use_runtime_pm = sdhci_acpi_flag(c, SDHCI_ACPI_RUNTIME_PM);
+
+ platform_set_drvdata(pdev, c);
+
+ host->hw_name = "ACPI";
+ host->ops = &sdhci_acpi_ops_dflt;
+ host->irq = platform_get_irq(pdev, 0);
+ if (host->irq < 0) {
+ err = host->irq;
+ goto err_free;
+ }
+
+ host->ioaddr = devm_ioremap(dev, iomem->start,
+ resource_size(iomem));
+ if (host->ioaddr == NULL) {
+ err = -ENOMEM;
+ goto err_free;
+ }
+
+ if (c->slot) {
+ if (c->slot->probe_slot) {
+ err = c->slot->probe_slot(pdev, device);
+ if (err)
+ goto err_free;
+ }
+ if (c->slot->chip) {
+ host->ops = c->slot->chip->ops;
+ host->quirks |= c->slot->chip->quirks;
+ host->quirks2 |= c->slot->chip->quirks2;
+ host->mmc->caps |= c->slot->chip->caps;
+ host->mmc->caps2 |= c->slot->chip->caps2;
+ host->mmc->pm_caps |= c->slot->chip->pm_caps;
+ }
+ 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);
+
+ err = mmc_gpiod_request_cd(host->mmc, NULL, 0, v, 0);
+ if (err) {
+ if (err == -EPROBE_DEFER)
+ goto err_free;
+ dev_warn(dev, "failed to setup card detect gpio\n");
+ c->use_runtime_pm = false;
+ }
+
+ if (quirks & DMI_QUIRK_RESET_SD_SIGNAL_VOLT_ON_SUSP)
+ c->reset_signal_volt_on_suspend = true;
+
+ if (quirks & DMI_QUIRK_SD_NO_WRITE_PROTECT)
+ host->mmc->caps2 |= MMC_CAP2_NO_WRITE_PROTECT;
+ }
+
+ err = sdhci_setup_host(host);
+ if (err)
+ goto err_free;
+
+ if (c->slot && c->slot->setup_host) {
+ err = c->slot->setup_host(pdev);
+ if (err)
+ goto err_cleanup;
+ }
+
+ err = __sdhci_add_host(host);
+ if (err)
+ goto err_cleanup;
+
+ 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_cleanup:
+ sdhci_cleanup_host(c->host);
+err_free:
+ if (c->slot && c->slot->free_slot)
+ c->slot->free_slot(pdev);
+
+ 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);
+
+ if (c->slot && c->slot->free_slot)
+ c->slot->free_slot(pdev);
+
+ sdhci_free_host(c->host);
+
+ return 0;
+}
+
+static void __maybe_unused sdhci_acpi_reset_signal_voltage_if_needed(
+ struct device *dev)
+{
+ struct sdhci_acpi_host *c = dev_get_drvdata(dev);
+ struct sdhci_host *host = c->host;
+
+ if (c->is_intel && c->reset_signal_volt_on_suspend &&
+ host->mmc->ios.signal_voltage != MMC_SIGNAL_VOLTAGE_330) {
+ struct intel_host *intel_host = sdhci_acpi_priv(c);
+ unsigned int fn = INTEL_DSM_V33_SWITCH;
+ u32 result = 0;
+
+ intel_dsm(intel_host, dev, fn, &result);
+ }
+}
+
+#ifdef CONFIG_PM_SLEEP
+
+static int sdhci_acpi_suspend(struct device *dev)
+{
+ struct sdhci_acpi_host *c = dev_get_drvdata(dev);
+ struct sdhci_host *host = c->host;
+ int ret;
+
+ if (host->tuning_mode != SDHCI_TUNING_MODE_3)
+ mmc_retune_needed(host->mmc);
+
+ ret = sdhci_suspend_host(host);
+ if (ret)
+ return ret;
+
+ sdhci_acpi_reset_signal_voltage_if_needed(dev);
+ return 0;
+}
+
+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);
+}
+
+#endif
+
+#ifdef CONFIG_PM
+
+static int sdhci_acpi_runtime_suspend(struct device *dev)
+{
+ struct sdhci_acpi_host *c = dev_get_drvdata(dev);
+ struct sdhci_host *host = c->host;
+ int ret;
+
+ if (host->tuning_mode != SDHCI_TUNING_MODE_3)
+ mmc_retune_needed(host->mmc);
+
+ ret = sdhci_runtime_suspend_host(host);
+ if (ret)
+ return ret;
+
+ sdhci_acpi_reset_signal_voltage_if_needed(dev);
+ return 0;
+}
+
+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, 0);
+}
+
+#endif
+
+static const struct dev_pm_ops sdhci_acpi_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(sdhci_acpi_suspend, 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",
+ .probe_type = PROBE_PREFER_ASYNCHRONOUS,
+ .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");