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- // SPDX-License-Identifier: GPL-2.0-only
- /*
- * Secure Digital Host Controller Interface ACPI driver.
- *
- * Copyright (c) 2012, Intel Corporation.
- */
- #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 <asm/cpu_device_id.h>
- #include <asm/intel-family.h>
- #include <asm/iosf_mbi.h>
- #include <linux/pci.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
- static bool sdhci_acpi_byt(void)
- {
- static const struct x86_cpu_id byt[] = {
- X86_MATCH_INTEL_FAM6_MODEL(ATOM_SILVERMONT, NULL),
- {}
- };
- return x86_match_cpu(byt);
- }
- static bool sdhci_acpi_cht(void)
- {
- static const struct x86_cpu_id cht[] = {
- X86_MATCH_INTEL_FAM6_MODEL(ATOM_AIRMONT, NULL),
- {}
- };
- return x86_match_cpu(cht);
- }
- #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 (!sdhci_acpi_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 (!sdhci_acpi_byt())
- return false;
- if (!iosf_mbi_available())
- return true;
- sdhci_acpi_byt_setting(dev);
- return false;
- }
- static bool sdhci_acpi_cht_pci_wifi(unsigned int vendor, unsigned int device,
- unsigned int slot, unsigned int parent_slot)
- {
- struct pci_dev *dev, *parent, *from = NULL;
- while (1) {
- dev = pci_get_device(vendor, device, from);
- pci_dev_put(from);
- if (!dev)
- break;
- parent = pci_upstream_bridge(dev);
- if (ACPI_COMPANION(&dev->dev) && PCI_SLOT(dev->devfn) == slot &&
- parent && PCI_SLOT(parent->devfn) == parent_slot &&
- !pci_upstream_bridge(parent)) {
- pci_dev_put(dev);
- return true;
- }
- from = dev;
- }
- return false;
- }
- /*
- * GPDwin uses PCI wifi which conflicts with SDIO's use of
- * acpi_device_fix_up_power() on child device nodes. Identifying GPDwin is
- * problematic, but since SDIO is only used for wifi, the presence of the PCI
- * wifi card in the expected slot with an ACPI companion node, is used to
- * indicate that acpi_device_fix_up_power() should be avoided.
- */
- static inline bool sdhci_acpi_no_fixup_child_power(struct acpi_device *adev)
- {
- return sdhci_acpi_cht() &&
- acpi_dev_hid_uid_match(adev, "80860F14", "2") &&
- sdhci_acpi_cht_pci_wifi(0x14e4, 0x43ec, 0, 28);
- }
- #else
- static inline void sdhci_acpi_byt_setting(struct device *dev)
- {
- }
- static inline bool sdhci_acpi_byt_defer(struct device *dev)
- {
- return false;
- }
- static inline bool sdhci_acpi_no_fixup_child_power(struct acpi_device *adev)
- {
- return false;
- }
- #endif
- static int bxt_get_cd(struct mmc_host *mmc)
- {
- int gpio_cd = mmc_gpio_get_cd(mmc);
- struct sdhci_host *host = mmc_priv(mmc);
- unsigned long flags;
- int ret = 0;
- if (!gpio_cd)
- return 0;
- spin_lock_irqsave(&host->lock, flags);
- if (host->flags & SDHCI_DEVICE_DEAD)
- goto out;
- ret = !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
- out:
- spin_unlock_irqrestore(&host->lock, flags);
- return ret;
- }
- 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 *drv_type)
- {
- *drv_type = MMC_SET_DRIVER_TYPE_A;
- return MMC_SET_DRIVER_TYPE_A;
- }
- 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 },
- { },
- };
- static const struct acpi_device_id sdhci_acpi_ids[] = {
- { "80865ACA" },
- { "80865ACC" },
- { "80865AD0" },
- { "80860F14" },
- { "80860F16" },
- { "INT33BB" },
- { "INT33C6" },
- { "INT3436" },
- { "INT344D" },
- { "PNP0D40" },
- { "QCOM8051" },
- { "QCOM8052" },
- { "AMDI0040" },
- { },
- };
- 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;
- struct acpi_device *device, *child;
- const struct dmi_system_id *id;
- 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(device);
- if (!sdhci_acpi_no_fixup_child_power(device)) {
- list_for_each_entry(child, &device->children, node)
- if (child->status.present && child->status.enabled)
- acpi_device_fix_up_power(child);
- }
- 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 = -EINVAL;
- 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");
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