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Diffstat (limited to 'drivers/usb/gadget/u_serial.h')
| -rw-r--r-- | drivers/usb/gadget/u_serial.h | 62 |
1 files changed, 62 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..bc38e68d0f26 --- /dev/null +++ b/drivers/usb/gadget/u_serial.h @@ -0,0 +1,62 @@ +/* + * 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/ch9.h> +#include <linux/usb/gadget.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 */ + + /* FIXME remove these when we switch to acm_bind_config... */ + struct usb_ep *notify; + struct usb_endpoint_descriptor *notify_desc; + u16 port_handshake_bits; +}; + +/* 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 *); + +#endif /* __U_SERIAL_H */ |