usb: renesas_usbhs: add autonomy mode

Current renesas_usbhs was designed to save power when USB is not connected.
And it assumed platform uses callback to notify connection/disconnection
by external interrupt.

But some SuperH / platform board doesn't have such feature.

This patch adds autonomy mode which detect USB connection/disconnection
by internal interrupt.
But power will be always ON when autonomy mode is selected.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 15 insertions, 0 deletions

diff --git a/drivers/usb/renesas_usbhs/mod.h b/drivers/usb/renesas_usbhs/mod.h
index 8644191e164f..5c845a28a21c 100644
--- a/drivers/usb/renesas_usbhs/mod.h
+++ b/drivers/usb/renesas_usbhs/mod.h
@@ -68,6 +68,19 @@ struct usbhs_mod {
 struct usbhs_mod_info {
         struct usbhs_mod *mod[USBHS_MAX];
         struct usbhs_mod *curt; /* current mod */
+
+        /*
+         * INTSTS0 :: VBINT
+         *
+         * This function will be used as autonomy mode
+         * when platform cannot call notify_hotplug.
+         *
+         * This callback cannot be member of "struct usbhs_mod"
+         * because it will be used even though
+         * host/gadget has not been selected.
+         */
+        int (*irq_vbus)(struct usbhs_priv *priv,
+                        struct usbhs_irq_state *irq_state);
 };
 
 /*
@@ -81,6 +94,8 @@ int usbhs_mod_change(struct usbhs_priv *priv, int id);
 int usbhs_mod_probe(struct usbhs_priv *priv);
 void usbhs_mod_remove(struct usbhs_priv *priv);
 
+void usbhs_mod_autonomy_mode(struct usbhs_priv *priv);
+
 /*
  *              status functions
  */