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sdhci: acpi: add qcom sdhci host reset quirk fix 

After host requests RESET_FOR_ALL action, the hardware output an
interrupt for OS and waiting for the OS to approve.

Before writing this fix, ACPI GED has handled the interrupt. But
the ACPI GED belongs to a slow process, and sometimes the handling
process time is more than 100ms(Mutex wait more than 100ms). So
drop the GED solution and add this quirk fix.

Signed-off-by: Wang Dongsheng <dongsheng.wang@hxt-semitech.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Wang Dongsheng 2018-08-16 12:48:43 +08:00 committed by Ulf Hansson
parent c7eabbee3d
commit 96ccb85809
1 changed files with 60 additions and 0 deletions
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60
drivers/mmc/host/sdhci-acpi.c
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@ -471,10 +471,70 @@ static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sd = {
.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, const char *hid,
const char *uid)
{
struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
struct sdhci_host *host = c->host;
int *irq = sdhci_acpi_priv(c);
*irq = -EINVAL;
if (strcmp(hid, "QCOM8051"))
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);
const char *hid;
adev = ACPI_COMPANION(dev);
if (!adev)
return -ENODEV;
hid = acpi_device_hid(adev);
if (strcmp(hid, "QCOM8051"))
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 = {