diff options
Diffstat (limited to 'drivers/usb/gadget/u_serial.h')
| -rw-r--r-- | drivers/usb/gadget/u_serial.h | 47 |
1 files changed, 47 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..eef881b8a574 --- /dev/null +++ b/drivers/usb/gadget/u_serial.h @@ -0,0 +1,47 @@ +#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 module 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. There's other 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 */ |