mirror of
https://github.com/followmsi/android_kernel_google_msm.git
synced 2024-11-06 23:17:41 +00:00
8ae8cfd4c6
wwan driver is dropping the data if tty is throttled or unable to accept more data. Add flow control between wwan and tty to fix random data dropping. CRs-Fixed: 373449 Change-Id: I524ee5e505e2e7e88df8fd669ae65bada4b235bf Signed-off-by: Vamsi Krishna <vskrishn@codeaurora.org>
76 lines
2.4 KiB
C
76 lines
2.4 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);
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extern int usb_wwan_tiocmset(struct tty_struct *tty,
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unsigned int set, unsigned int clear);
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extern int usb_wwan_ioctl(struct tty_struct *tty,
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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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extern void usb_wwan_throttle(struct tty_struct *tty);
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extern void usb_wwan_unthrottle(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 5
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#define N_OUT_URB 5
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#define IN_BUFLEN 16384
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#define OUT_BUFLEN 65536
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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 submitted;
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struct usb_anchor delayed;
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struct list_head in_urb_list;
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spinlock_t in_lock;
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ssize_t n_read;
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struct work_struct in_work;
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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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