02303f7337
Some devices (ex ZTE 2726) simply don't respond at all when data is sent to some of their USB interfaces. The data gets stuck in the TTYs queue and sits there until close(2), which them blocks because closing_wait defaults to 30 seconds (even though the fd is O_NONBLOCK). This is rarely desired. Implement the standard mechanism to adjust closing_wait and let applications handle it how they want to. Signed-off-by: Dan Williams <dcbw@redhat.com>
70 lines
2.2 KiB
C
70 lines
2.2 KiB
C
/*
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* Definitions for USB serial mobile broadband cards
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*/
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#ifndef __LINUX_USB_USB_WWAN
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#define __LINUX_USB_USB_WWAN
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extern void usb_wwan_dtr_rts(struct usb_serial_port *port, int on);
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extern int usb_wwan_open(struct tty_struct *tty, struct usb_serial_port *port);
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extern void usb_wwan_close(struct usb_serial_port *port);
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extern int usb_wwan_startup(struct usb_serial *serial);
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extern void usb_wwan_disconnect(struct usb_serial *serial);
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extern void usb_wwan_release(struct usb_serial *serial);
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extern int usb_wwan_write_room(struct tty_struct *tty);
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extern void usb_wwan_set_termios(struct tty_struct *tty,
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struct usb_serial_port *port,
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struct ktermios *old);
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extern int usb_wwan_tiocmget(struct tty_struct *tty, struct file *file);
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extern int usb_wwan_tiocmset(struct tty_struct *tty, struct file *file,
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unsigned int set, unsigned int clear);
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extern int usb_wwan_ioctl(struct tty_struct *tty, struct file *file,
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unsigned int cmd, unsigned long arg);
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extern int usb_wwan_send_setup(struct usb_serial_port *port);
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extern int usb_wwan_write(struct tty_struct *tty, struct usb_serial_port *port,
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const unsigned char *buf, int count);
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extern int usb_wwan_chars_in_buffer(struct tty_struct *tty);
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#ifdef CONFIG_PM
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extern int usb_wwan_suspend(struct usb_serial *serial, pm_message_t message);
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extern int usb_wwan_resume(struct usb_serial *serial);
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#endif
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/* per port private data */
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#define N_IN_URB 4
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#define N_OUT_URB 4
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#define IN_BUFLEN 4096
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#define OUT_BUFLEN 4096
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struct usb_wwan_intf_private {
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spinlock_t susp_lock;
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unsigned int suspended:1;
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int in_flight;
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int (*send_setup) (struct usb_serial_port *port);
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void *private;
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};
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struct usb_wwan_port_private {
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/* Input endpoints and buffer for this port */
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struct urb *in_urbs[N_IN_URB];
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u8 *in_buffer[N_IN_URB];
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/* Output endpoints and buffer for this port */
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struct urb *out_urbs[N_OUT_URB];
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u8 *out_buffer[N_OUT_URB];
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unsigned long out_busy; /* Bit vector of URBs in use */
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int opened;
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struct usb_anchor delayed;
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/* Settings for the port */
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int rts_state; /* Handshaking pins (outputs) */
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int dtr_state;
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int cts_state; /* Handshaking pins (inputs) */
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int dsr_state;
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int dcd_state;
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int ri_state;
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unsigned long tx_start_time[N_OUT_URB];
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};
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#endif /* __LINUX_USB_USB_WWAN */
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