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-rw-r--r--drivers/mfd/rtsx_pcr.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/mfd/rtsx_pcr.c b/drivers/mfd/rtsx_pcr.c
index 822237e322b..481a98a10ec 100644
--- a/drivers/mfd/rtsx_pcr.c
+++ b/drivers/mfd/rtsx_pcr.c
@@ -708,6 +708,25 @@ int rtsx_pci_card_power_off(struct rtsx_pcr *pcr, int card)
}
EXPORT_SYMBOL_GPL(rtsx_pci_card_power_off);
+int rtsx_pci_card_exclusive_check(struct rtsx_pcr *pcr, int card)
+{
+ unsigned int cd_mask[] = {
+ [RTSX_SD_CARD] = SD_EXIST,
+ [RTSX_MS_CARD] = MS_EXIST
+ };
+
+ if (!pcr->ms_pmos) {
+ /* When using single PMOS, accessing card is not permitted
+ * if the existing card is not the designated one.
+ */
+ if (pcr->card_exist & (~cd_mask[card]))
+ return -EIO;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(rtsx_pci_card_exclusive_check);
+
int rtsx_pci_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
{
if (pcr->ops->switch_output_voltage)
@@ -784,6 +803,9 @@ static void rtsx_pci_card_detect(struct work_struct *work)
card_inserted = pcr->ops->cd_deglitch(pcr);
card_detect = card_inserted | card_removed;
+
+ pcr->card_exist |= card_inserted;
+ pcr->card_exist &= ~card_removed;
}
mutex_unlock(&pcr->pcr_mutex);
@@ -976,6 +998,14 @@ static int rtsx_pci_init_hw(struct rtsx_pcr *pcr)
return err;
}
+ /* No CD interrupt if probing driver with card inserted.
+ * So we need to initialize pcr->card_exist here.
+ */
+ if (pcr->ops->cd_deglitch)
+ pcr->card_exist = pcr->ops->cd_deglitch(pcr);
+ else
+ pcr->card_exist = rtsx_pci_readl(pcr, RTSX_BIPR) & CARD_EXIST;
+
return 0;
}