Commit 02a3c0bd authored by ernest.zhang's avatar ernest.zhang Committed by Ulf Hansson
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mmc: sdhci: Add MSI interrupt support for O2 SD host



Add MSI interrupt support if the SD host device can support MSI interrupt.

Signed-off-by: default avatarernest.zhang <ernest.zhang@bayhubtech.com>
Acked-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 0086fc21
......@@ -260,6 +260,29 @@ static void sdhci_pci_o2_fujin2_pci_init(struct sdhci_pci_chip *chip)
pci_write_config_dword(chip->pdev, O2_SD_MISC_CTRL4, scratch_32);
}
static void sdhci_pci_o2_enable_msi(struct sdhci_pci_chip *chip,
struct sdhci_host *host)
{
int ret;
ret = pci_find_capability(chip->pdev, PCI_CAP_ID_MSI);
if (!ret) {
pr_info("%s: unsupport msi, use INTx irq\n",
mmc_hostname(host->mmc));
return;
}
ret = pci_alloc_irq_vectors(chip->pdev, 1, 1,
PCI_IRQ_MSI | PCI_IRQ_MSIX);
if (ret < 0) {
pr_err("%s: enable PCI MSI failed, err=%d\n",
mmc_hostname(host->mmc), ret);
return;
}
host->irq = pci_irq_vector(chip->pdev, 0);
}
int sdhci_pci_o2_probe_slot(struct sdhci_pci_slot *slot)
{
struct sdhci_pci_chip *chip;
......@@ -279,6 +302,8 @@ int sdhci_pci_o2_probe_slot(struct sdhci_pci_slot *slot)
if (reg & 0x1)
host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12;
sdhci_pci_o2_enable_msi(chip, host);
if (chip->pdev->device == PCI_DEVICE_ID_O2_SEABIRD0) {
ret = pci_read_config_dword(chip->pdev,
O2_SD_MISC_SETTING, &reg);
......
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