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path: root/drivers/usb/phy/phy-ab8500-usb.c
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Diffstat (limited to 'drivers/usb/phy/phy-ab8500-usb.c')
-rw-r--r--drivers/usb/phy/phy-ab8500-usb.c26
1 files changed, 25 insertions, 1 deletions
diff --git a/drivers/usb/phy/phy-ab8500-usb.c b/drivers/usb/phy/phy-ab8500-usb.c
index 4bb4b1d42f32..20c0f082bf9c 100644
--- a/drivers/usb/phy/phy-ab8500-usb.c
+++ b/drivers/usb/phy/phy-ab8500-usb.c
@@ -108,7 +108,8 @@ enum ab8500_usb_mode {
USB_IDLE = 0,
USB_PERIPHERAL,
USB_HOST,
- USB_DEDICATED_CHG
+ USB_DEDICATED_CHG,
+ USB_UART
};
/* Register USB_LINK_STATUS interrupt */
@@ -393,6 +394,24 @@ static int ab8505_usb_link_status_update(struct ab8500_usb *ab,
usb_phy_set_event(&ab->phy, USB_EVENT_CHARGER);
break;
+ /*
+ * FIXME: For now we rely on the boot firmware to set up the necessary
+ * PHY/pin configuration for UART mode.
+ *
+ * AB8505 does not seem to report any status change for UART cables,
+ * possibly because it cannot detect them autonomously.
+ * We may need to measure the ID resistance manually to reliably
+ * detect UART cables after bootup.
+ */
+ case USB_LINK_SAMSUNG_UART_CBL_PHY_EN_8505:
+ case USB_LINK_SAMSUNG_UART_CBL_PHY_DISB_8505:
+ if (ab->mode == USB_IDLE) {
+ ab->mode = USB_UART;
+ ab8500_usb_peri_phy_en(ab);
+ }
+
+ break;
+
default:
break;
}
@@ -566,6 +585,11 @@ static irqreturn_t ab8500_usb_disconnect_irq(int irq, void *data)
ab->vbus_draw = 0;
}
+ if (ab->mode == USB_UART) {
+ ab8500_usb_peri_phy_dis(ab);
+ ab->mode = USB_IDLE;
+ }
+
if (is_ab8500_2p0(ab->ab8500)) {
if (ab->mode == USB_DEDICATED_CHG) {
ab8500_usb_wd_linkstatus(ab,