From: Li Jun <b47...@freescale.com>
For non-otg mode, we keep the usage of disconnect line between phy analog
and digital unchanging; for otg mode, at peripheral role, we keep the usage
unchanging too, at host role, the digital part needs to know dp/dm change
to respond device's data pulse when it is at low power mode.
Signed-off-by: Peter Chen <peter.c...@freescale.com>
Signed-off-by: Li Jun <b47...@freescale.com>
---
drivers/usb/phy/phy-mxs-usb.c | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/phy/phy-mxs-usb.c b/drivers/usb/phy/phy-mxs-usb.c
index fcadbd2..eb74605 100644
--- a/drivers/usb/phy/phy-mxs-usb.c
+++ b/drivers/usb/phy/phy-mxs-usb.c
@@ -40,6 +40,7 @@
#define BM_USBPHY_CTRL_SFTRST BIT(31)
#define BM_USBPHY_CTRL_CLKGATE BIT(30)
+#define BM_USBPHY_CTRL_OTG_ID_VALUE BIT(27)
#define BM_USBPHY_CTRL_ENAUTOSET_USBCLKS BIT(26)
#define BM_USBPHY_CTRL_ENAUTOCLR_USBCLKGATE BIT(25)
#define BM_USBPHY_CTRL_ENVBUSCHG_WKUP BIT(23)
@@ -255,6 +256,18 @@ static void __mxs_phy_disconnect_line(struct mxs_phy
*mxs_phy, bool disconnect)
usleep_range(500, 1000);
}
+static bool mxs_phy_is_otg_host(struct mxs_phy *mxs_phy)
+{
+ void __iomem *base = mxs_phy->phy.io_priv;
+ u32 phyctrl = readl(base + HW_USBPHY_CTRL);
+
+ if (IS_ENABLED(CONFIG_USB_OTG) &&
+ !(phyctrl & BM_USBPHY_CTRL_OTG_ID_VALUE))
+ return true;
+
+ return false;
+}
+
static void mxs_phy_disconnect_line(struct mxs_phy *mxs_phy, bool on)
{
bool vbus_is_on = false;
@@ -269,7 +282,7 @@ static void mxs_phy_disconnect_line(struct mxs_phy
*mxs_phy, bool on)
vbus_is_on = mxs_phy_get_vbus_status(mxs_phy);
- if (on && !vbus_is_on)
+ if (on && !vbus_is_on && !mxs_phy_is_otg_host(mxs_phy))
__mxs_phy_disconnect_line(mxs_phy, true);
else
__mxs_phy_disconnect_line(mxs_phy, false);
--
1.9.1
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
