On 16/08/18 07:48, Wang Dongsheng wrote:
> 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@xxxxxxxxxxxxxxxx>
Acked-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
> ---
> drivers/mmc/host/sdhci-acpi.c | 60 +++++++++++++++++++++++++++++++++++
> 1 file changed, 60 insertions(+)
>
> diff --git a/drivers/mmc/host/sdhci-acpi.c b/drivers/mmc/host/sdhci-acpi.c
> index c61109f7b793..82c9b9326e9e 100644
> --- a/drivers/mmc/host/sdhci-acpi.c
> +++ b/drivers/mmc/host/sdhci-acpi.c
> @@ -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 = {
>
