4 files changed, 92 insertions, 0 deletions

diff --git a/include/linux/usb/Kbuild b/include/linux/usb/Kbuild
index 43f160cfe003..6ce42bf9f743 100644
--- a/include/linux/usb/Kbuild
+++ b/include/linux/usb/Kbuild
@@ -1,5 +1,6 @@
 unifdef-y += audio.h
 unifdef-y += cdc.h
 unifdef-y += ch9.h
+unifdef-y += gadgetfs.h
 unifdef-y += midi.h
 
diff --git a/include/linux/usb/gadgetfs.h b/include/linux/usb/gadgetfs.h
new file mode 100644
index 000000000000..e8654c338729
--- /dev/null
+++ b/include/linux/usb/gadgetfs.h
@@ -0,0 +1,81 @@
+#ifndef __LINUX_USB_GADGETFS_H
+#define __LINUX_USB_GADGETFS_H
+
+#include <asm/types.h>
+#include <asm/ioctl.h>
+
+#include <linux/usb/ch9.h>
+
+/*
+ * Filesystem based user-mode API to USB Gadget controller hardware
+ *
+ * Other than ep0 operations, most things are done by read() and write()
+ * on endpoint files found in one directory.  They are configured by
+ * writing descriptors, and then may be used for normal stream style
+ * i/o requests.  When ep0 is configured, the device can enumerate;
+ * when it's closed, the device disconnects from usb.  Operations on
+ * ep0 require ioctl() operations.
+ *
+ * Configuration and device descriptors get written to /dev/gadget/$CHIP,
+ * which may then be used to read usb_gadgetfs_event structs.  The driver
+ * may activate endpoints as it handles SET_CONFIGURATION setup events,
+ * or earlier; writing endpoint descriptors to /dev/gadget/$ENDPOINT
+ * then performing data transfers by reading or writing.
+ */
+
+/*
+ * Events are delivered on the ep0 file descriptor, when the user mode driver
+ * reads from this file descriptor after writing the descriptors.  Don't
+ * stop polling this descriptor.
+ */
+
+enum usb_gadgetfs_event_type {
+        GADGETFS_NOP = 0,
+
+        GADGETFS_CONNECT,
+        GADGETFS_DISCONNECT,
+        GADGETFS_SETUP,
+        GADGETFS_SUSPEND,
+        // and likely more !
+};
+
+/* NOTE:  this structure must stay the same size and layout on
+ * both 32-bit and 64-bit kernels.
+ */
+struct usb_gadgetfs_event {
+        union {
+                // NOP, DISCONNECT, SUSPEND: nothing
+                // ... some hardware can't report disconnection
+
+                // CONNECT: just the speed
+                enum usb_device_speed   speed;
+
+                // SETUP: packet; DATA phase i/o precedes next event
+                // (setup.bmRequestType & USB_DIR_IN) flags direction
+                // ... includes SET_CONFIGURATION, SET_INTERFACE
+                struct usb_ctrlrequest  setup;
+        } u;
+        enum usb_gadgetfs_event_type    type;
+};
+
+
+/* endpoint ioctls */
+
+/* IN transfers may be reported to the gadget driver as complete
+ *      when the fifo is loaded, before the host reads the data;
+ * OUT transfers may be reported to the host's "client" driver as
+ *      complete when they're sitting in the FIFO unread.
+ * THIS returns how many bytes are "unclaimed" in the endpoint fifo
+ * (needed for precise fault handling, when the hardware allows it)
+ */
+#define GADGETFS_FIFO_STATUS    _IO('g',1)
+
+/* discards any unclaimed data in the fifo. */
+#define GADGETFS_FIFO_FLUSH     _IO('g',2)
+
+/* resets endpoint halt+toggle; used to implement set_interface.
+ * some hardware (like pxa2xx) can't support this.
+ */
+#define GADGETFS_CLEAR_HALT     _IO('g',3)
+
+#endif /* __LINUX_USB_GADGETFS_H */
diff --git a/include/linux/usb/quirks.h b/include/linux/usb/quirks.h
index 6bac8faacbc6..8da374caf582 100644
--- a/include/linux/usb/quirks.h
+++ b/include/linux/usb/quirks.h
@@ -9,3 +9,6 @@
 
 /* string descriptors must not be fetched using a 255-byte read */
 #define USB_QUIRK_STRING_FETCH_255      0x00000002
+
+/* device can't resume correctly so reset it instead */
+#define USB_QUIRK_RESET_RESUME          0x00000004
diff --git a/include/linux/usb/serial.h b/include/linux/usb/serial.h
index 32acbae28d24..e8b8928232c8 100644
--- a/include/linux/usb/serial.h
+++ b/include/linux/usb/serial.h
@@ -221,6 +221,9 @@ struct usb_serial_driver {
         int (*port_probe) (struct usb_serial_port *port);
         int (*port_remove) (struct usb_serial_port *port);
 
+        int (*suspend) (struct usb_serial *serial, pm_message_t message);
+        int (*resume) (struct usb_serial *serial);
+
         /* serial function calls */
         int  (*open)            (struct usb_serial_port *port, struct file * filp);
         void (*close)           (struct usb_serial_port *port, struct file * filp);
@@ -249,6 +252,9 @@ extern void usb_serial_port_softint(struct usb_serial_port *port);
 extern int usb_serial_probe(struct usb_interface *iface, const struct usb_device_id *id);
 extern void usb_serial_disconnect(struct usb_interface *iface);
 
+extern int usb_serial_suspend(struct usb_interface *intf, pm_message_t message);
+extern int usb_serial_resume(struct usb_interface *intf);
+
 extern int ezusb_writememory (struct usb_serial *serial, int address, unsigned char *data, int length, __u8 bRequest);
 extern int ezusb_set_reset (struct usb_serial *serial, unsigned char reset_bit);
 
@@ -269,6 +275,7 @@ extern void usb_serial_put(struct usb_serial *serial);
 extern int usb_serial_generic_open (struct usb_serial_port *port, struct file *filp);
 extern int usb_serial_generic_write (struct usb_serial_port *port, const unsigned char *buf, int count);
 extern void usb_serial_generic_close (struct usb_serial_port *port, struct file *filp);
+extern int usb_serial_generic_resume (struct usb_serial *serial);
 extern int usb_serial_generic_write_room (struct usb_serial_port *port);
 extern int usb_serial_generic_chars_in_buffer (struct usb_serial_port *port);
 extern void usb_serial_generic_read_bulk_callback (struct urb *urb);