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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2008-07-22 09:12:37 +0200
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2008-07-22 09:12:37 +0200
commit8725f25acc656c1522d48a6746055099efdaca4c (patch)
treee241424fa58178ed6c2a95a4eb931ea83dbea33c /drivers/usb/gadget/u_serial.h
parentpowerpc: Fix build bug with binutils < 2.18 and GCC < 4.2 (diff)
parentMerge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6 (diff)
downloadlinux-8725f25acc656c1522d48a6746055099efdaca4c.tar.xz
linux-8725f25acc656c1522d48a6746055099efdaca4c.zip
Merge commit 'origin/master'
Manually fixed up: drivers/net/fs_enet/fs_enet-main.c
Diffstat (limited to 'drivers/usb/gadget/u_serial.h')
-rw-r--r--drivers/usb/gadget/u_serial.h58
1 files changed, 58 insertions, 0 deletions
diff --git a/drivers/usb/gadget/u_serial.h b/drivers/usb/gadget/u_serial.h
new file mode 100644
index 000000000000..7b561138f90e
--- /dev/null
+++ b/drivers/usb/gadget/u_serial.h
@@ -0,0 +1,58 @@
+/*
+ * u_serial.h - interface to USB gadget "serial port"/TTY utilities
+ *
+ * Copyright (C) 2008 David Brownell
+ * Copyright (C) 2008 by Nokia Corporation
+ *
+ * This software is distributed under the terms of the GNU General
+ * Public License ("GPL") as published by the Free Software Foundation,
+ * either version 2 of that License or (at your option) any later version.
+ */
+
+#ifndef __U_SERIAL_H
+#define __U_SERIAL_H
+
+#include <linux/usb/composite.h>
+#include <linux/usb/cdc.h>
+
+/*
+ * One non-multiplexed "serial" I/O port ... there can be several of these
+ * on any given USB peripheral device, if it provides enough endpoints.
+ *
+ * The "u_serial" utility component exists to do one thing: manage TTY
+ * style I/O using the USB peripheral endpoints listed here, including
+ * hookups to sysfs and /dev for each logical "tty" device.
+ *
+ * REVISIT need TTY --> USB event flow too, so ACM can report open/close
+ * as carrier detect events. Model after ECM. There's more ACM state too.
+ *
+ * REVISIT someday, allow multiplexing several TTYs over these endpoints.
+ */
+struct gserial {
+ struct usb_function func;
+
+ /* port is managed by gserial_{connect,disconnect} */
+ struct gs_port *ioport;
+
+ struct usb_ep *in;
+ struct usb_ep *out;
+ struct usb_endpoint_descriptor *in_desc;
+ struct usb_endpoint_descriptor *out_desc;
+
+ /* REVISIT avoid this CDC-ACM support harder ... */
+ struct usb_cdc_line_coding port_line_coding; /* 9600-8-N-1 etc */
+};
+
+/* port setup/teardown is handled by gadget driver */
+int gserial_setup(struct usb_gadget *g, unsigned n_ports);
+void gserial_cleanup(void);
+
+/* connect/disconnect is handled by individual functions */
+int gserial_connect(struct gserial *, u8 port_num);
+void gserial_disconnect(struct gserial *);
+
+/* functions are bound to configurations by a config or gadget driver */
+int acm_bind_config(struct usb_configuration *c, u8 port_num);
+int gser_bind_config(struct usb_configuration *c, u8 port_num);
+
+#endif /* __U_SERIAL_H */