usb serial: Add generic USB wwan support
The generic USB serial code is ill-suited for high-speed USB wwan devices, resulting in the option driver. However, other non-option devices may also gain similar benefits from not using the generic code. Factorise out the non-option specific code from the option driver and make it available to other users. Signed-off-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Matthew Garrett
Greg Kroah-Hartman
parent
a90309860b
commit
0d4561947b
@ -576,6 +576,9 @@ config USB_SERIAL_XIRCOM
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To compile this driver as a module, choose M here: the
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module will be called keyspan_pda.
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config USB_SERIAL_WWAN
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tristate
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config USB_SERIAL_OPTION
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tristate "USB driver for GSM and CDMA modems"
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help
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@ -52,6 +52,7 @@ obj-$(CONFIG_USB_SERIAL_SIEMENS_MPI) += siemens_mpi.o
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obj-$(CONFIG_USB_SERIAL_SIERRAWIRELESS) += sierra.o
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obj-$(CONFIG_USB_SERIAL_SPCP8X5) += spcp8x5.o
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obj-$(CONFIG_USB_SERIAL_SYMBOL) += symbolserial.o
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obj-$(CONFIG_USB_SERIAL_WWAN) += usb_wwan.o
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obj-$(CONFIG_USB_SERIAL_TI) += ti_usb_3410_5052.o
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obj-$(CONFIG_USB_SERIAL_VISOR) += visor.o
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obj-$(CONFIG_USB_SERIAL_WHITEHEAT) += whiteheat.o
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67
drivers/usb/serial/usb-wwan.h
Normal file
67
drivers/usb/serial/usb-wwan.h
Normal file
@ -0,0 +1,67 @@
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/*
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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_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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665
drivers/usb/serial/usb_wwan.c
Normal file
665
drivers/usb/serial/usb_wwan.c
Normal file
@ -0,0 +1,665 @@
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/*
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USB Driver layer for GSM modems
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Copyright (C) 2005 Matthias Urlichs <smurf@smurf.noris.de>
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This driver is free software; you can redistribute it and/or modify
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it under the terms of Version 2 of the GNU General Public License as
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published by the Free Software Foundation.
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Portions copied from the Keyspan driver by Hugh Blemings <hugh@blemings.org>
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History: see the git log.
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Work sponsored by: Sigos GmbH, Germany <info@sigos.de>
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This driver exists because the "normal" serial driver doesn't work too well
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with GSM modems. Issues:
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- data loss -- one single Receive URB is not nearly enough
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- controlling the baud rate doesn't make sense
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*/
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#define DRIVER_VERSION "v0.7.2"
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#define DRIVER_AUTHOR "Matthias Urlichs <smurf@smurf.noris.de>"
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#define DRIVER_DESC "USB Driver for GSM modems"
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#include <linux/kernel.h>
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#include <linux/jiffies.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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#include <linux/tty.h>
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#include <linux/tty_flip.h>
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#include <linux/module.h>
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#include <linux/bitops.h>
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#include <linux/usb.h>
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#include <linux/usb/serial.h>
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#include "usb-wwan.h"
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static int debug;
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void usb_wwan_dtr_rts(struct usb_serial_port *port, int on)
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{
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struct usb_serial *serial = port->serial;
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struct usb_wwan_port_private *portdata;
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struct usb_wwan_intf_private *intfdata;
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dbg("%s", __func__);
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intfdata = port->serial->private;
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if (!intfdata->send_setup)
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return;
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portdata = usb_get_serial_port_data(port);
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mutex_lock(&serial->disc_mutex);
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portdata->rts_state = on;
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portdata->dtr_state = on;
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if (serial->dev)
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intfdata->send_setup(port);
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mutex_unlock(&serial->disc_mutex);
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}
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EXPORT_SYMBOL(usb_wwan_dtr_rts);
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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_termios)
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{
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struct usb_wwan_intf_private *intfdata = port->serial->private;
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dbg("%s", __func__);
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/* Doesn't support option setting */
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tty_termios_copy_hw(tty->termios, old_termios);
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if (intfdata->send_setup)
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intfdata->send_setup(port);
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}
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EXPORT_SYMBOL(usb_wwan_set_termios);
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int usb_wwan_tiocmget(struct tty_struct *tty, struct file *file)
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{
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struct usb_serial_port *port = tty->driver_data;
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unsigned int value;
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struct usb_wwan_port_private *portdata;
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portdata = usb_get_serial_port_data(port);
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value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
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((portdata->dtr_state) ? TIOCM_DTR : 0) |
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((portdata->cts_state) ? TIOCM_CTS : 0) |
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((portdata->dsr_state) ? TIOCM_DSR : 0) |
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((portdata->dcd_state) ? TIOCM_CAR : 0) |
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((portdata->ri_state) ? TIOCM_RNG : 0);
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return value;
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}
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EXPORT_SYMBOL(usb_wwan_tiocmget);
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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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{
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struct usb_serial_port *port = tty->driver_data;
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struct usb_wwan_port_private *portdata;
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struct usb_wwan_intf_private *intfdata;
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portdata = usb_get_serial_port_data(port);
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intfdata = port->serial->private;
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if (!intfdata->send_setup)
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return -EINVAL;
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/* FIXME: what locks portdata fields ? */
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if (set & TIOCM_RTS)
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portdata->rts_state = 1;
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if (set & TIOCM_DTR)
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portdata->dtr_state = 1;
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if (clear & TIOCM_RTS)
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portdata->rts_state = 0;
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if (clear & TIOCM_DTR)
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portdata->dtr_state = 0;
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return intfdata->send_setup(port);
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}
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EXPORT_SYMBOL(usb_wwan_tiocmset);
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/* Write */
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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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{
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struct usb_wwan_port_private *portdata;
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struct usb_wwan_intf_private *intfdata;
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int i;
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int left, todo;
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struct urb *this_urb = NULL; /* spurious */
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int err;
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unsigned long flags;
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portdata = usb_get_serial_port_data(port);
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intfdata = port->serial->private;
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dbg("%s: write (%d chars)", __func__, count);
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i = 0;
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left = count;
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for (i = 0; left > 0 && i < N_OUT_URB; i++) {
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todo = left;
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if (todo > OUT_BUFLEN)
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todo = OUT_BUFLEN;
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this_urb = portdata->out_urbs[i];
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if (test_and_set_bit(i, &portdata->out_busy)) {
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if (time_before(jiffies,
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portdata->tx_start_time[i] + 10 * HZ))
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continue;
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usb_unlink_urb(this_urb);
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continue;
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}
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dbg("%s: endpoint %d buf %d", __func__,
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usb_pipeendpoint(this_urb->pipe), i);
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err = usb_autopm_get_interface_async(port->serial->interface);
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if (err < 0)
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break;
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/* send the data */
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memcpy(this_urb->transfer_buffer, buf, todo);
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this_urb->transfer_buffer_length = todo;
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spin_lock_irqsave(&intfdata->susp_lock, flags);
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if (intfdata->suspended) {
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usb_anchor_urb(this_urb, &portdata->delayed);
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spin_unlock_irqrestore(&intfdata->susp_lock, flags);
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} else {
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intfdata->in_flight++;
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spin_unlock_irqrestore(&intfdata->susp_lock, flags);
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err = usb_submit_urb(this_urb, GFP_ATOMIC);
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if (err) {
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dbg("usb_submit_urb %p (write bulk) failed "
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"(%d)", this_urb, err);
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clear_bit(i, &portdata->out_busy);
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spin_lock_irqsave(&intfdata->susp_lock, flags);
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intfdata->in_flight--;
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spin_unlock_irqrestore(&intfdata->susp_lock,
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flags);
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continue;
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}
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}
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portdata->tx_start_time[i] = jiffies;
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buf += todo;
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left -= todo;
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}
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count -= left;
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dbg("%s: wrote (did %d)", __func__, count);
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return count;
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}
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EXPORT_SYMBOL(usb_wwan_write);
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static void usb_wwan_indat_callback(struct urb *urb)
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{
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int err;
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int endpoint;
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struct usb_serial_port *port;
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struct tty_struct *tty;
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unsigned char *data = urb->transfer_buffer;
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int status = urb->status;
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dbg("%s: %p", __func__, urb);
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endpoint = usb_pipeendpoint(urb->pipe);
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port = urb->context;
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if (status) {
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dbg("%s: nonzero status: %d on endpoint %02x.",
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__func__, status, endpoint);
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} else {
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tty = tty_port_tty_get(&port->port);
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if (urb->actual_length) {
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tty_insert_flip_string(tty, data, urb->actual_length);
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tty_flip_buffer_push(tty);
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} else
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dbg("%s: empty read urb received", __func__);
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tty_kref_put(tty);
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/* Resubmit urb so we continue receiving */
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if (status != -ESHUTDOWN) {
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err = usb_submit_urb(urb, GFP_ATOMIC);
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if (err && err != -EPERM)
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printk(KERN_ERR "%s: resubmit read urb failed. "
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"(%d)", __func__, err);
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else
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usb_mark_last_busy(port->serial->dev);
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}
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}
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return;
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}
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static void usb_wwan_outdat_callback(struct urb *urb)
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{
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struct usb_serial_port *port;
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struct usb_wwan_port_private *portdata;
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struct usb_wwan_intf_private *intfdata;
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int i;
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dbg("%s", __func__);
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port = urb->context;
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intfdata = port->serial->private;
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usb_serial_port_softint(port);
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usb_autopm_put_interface_async(port->serial->interface);
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portdata = usb_get_serial_port_data(port);
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spin_lock(&intfdata->susp_lock);
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intfdata->in_flight--;
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spin_unlock(&intfdata->susp_lock);
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for (i = 0; i < N_OUT_URB; ++i) {
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if (portdata->out_urbs[i] == urb) {
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smp_mb__before_clear_bit();
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clear_bit(i, &portdata->out_busy);
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break;
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}
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}
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}
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int usb_wwan_write_room(struct tty_struct *tty)
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{
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struct usb_serial_port *port = tty->driver_data;
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struct usb_wwan_port_private *portdata;
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int i;
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int data_len = 0;
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struct urb *this_urb;
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portdata = usb_get_serial_port_data(port);
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for (i = 0; i < N_OUT_URB; i++) {
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this_urb = portdata->out_urbs[i];
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if (this_urb && !test_bit(i, &portdata->out_busy))
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data_len += OUT_BUFLEN;
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}
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dbg("%s: %d", __func__, data_len);
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return data_len;
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}
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EXPORT_SYMBOL(usb_wwan_write_room);
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int usb_wwan_chars_in_buffer(struct tty_struct *tty)
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{
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struct usb_serial_port *port = tty->driver_data;
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struct usb_wwan_port_private *portdata;
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int i;
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int data_len = 0;
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struct urb *this_urb;
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portdata = usb_get_serial_port_data(port);
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for (i = 0; i < N_OUT_URB; i++) {
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this_urb = portdata->out_urbs[i];
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/* FIXME: This locking is insufficient as this_urb may
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go unused during the test */
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if (this_urb && test_bit(i, &portdata->out_busy))
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data_len += this_urb->transfer_buffer_length;
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}
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dbg("%s: %d", __func__, data_len);
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return data_len;
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}
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EXPORT_SYMBOL(usb_wwan_chars_in_buffer);
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int usb_wwan_open(struct tty_struct *tty, struct usb_serial_port *port)
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{
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struct usb_wwan_port_private *portdata;
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struct usb_wwan_intf_private *intfdata;
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struct usb_serial *serial = port->serial;
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int i, err;
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struct urb *urb;
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portdata = usb_get_serial_port_data(port);
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intfdata = serial->private;
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dbg("%s", __func__);
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/* Start reading from the IN endpoint */
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for (i = 0; i < N_IN_URB; i++) {
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urb = portdata->in_urbs[i];
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if (!urb)
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continue;
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err = usb_submit_urb(urb, GFP_KERNEL);
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if (err) {
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dbg("%s: submit urb %d failed (%d) %d",
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__func__, i, err, urb->transfer_buffer_length);
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}
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}
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if (intfdata->send_setup)
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intfdata->send_setup(port);
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serial->interface->needs_remote_wakeup = 1;
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spin_lock_irq(&intfdata->susp_lock);
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portdata->opened = 1;
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spin_unlock_irq(&intfdata->susp_lock);
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usb_autopm_put_interface(serial->interface);
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return 0;
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}
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EXPORT_SYMBOL(usb_wwan_open);
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void usb_wwan_close(struct usb_serial_port *port)
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{
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int i;
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struct usb_serial *serial = port->serial;
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struct usb_wwan_port_private *portdata;
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struct usb_wwan_intf_private *intfdata = port->serial->private;
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dbg("%s", __func__);
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portdata = usb_get_serial_port_data(port);
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if (serial->dev) {
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/* Stop reading/writing urbs */
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spin_lock_irq(&intfdata->susp_lock);
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portdata->opened = 0;
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spin_unlock_irq(&intfdata->susp_lock);
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for (i = 0; i < N_IN_URB; i++)
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usb_kill_urb(portdata->in_urbs[i]);
|
||||
for (i = 0; i < N_OUT_URB; i++)
|
||||
usb_kill_urb(portdata->out_urbs[i]);
|
||||
usb_autopm_get_interface(serial->interface);
|
||||
serial->interface->needs_remote_wakeup = 0;
|
||||
}
|
||||
}
|
||||
EXPORT_SYMBOL(usb_wwan_close);
|
||||
|
||||
/* Helper functions used by usb_wwan_setup_urbs */
|
||||
static struct urb *usb_wwan_setup_urb(struct usb_serial *serial, int endpoint,
|
||||
int dir, void *ctx, char *buf, int len,
|
||||
void (*callback) (struct urb *))
|
||||
{
|
||||
struct urb *urb;
|
||||
|
||||
if (endpoint == -1)
|
||||
return NULL; /* endpoint not needed */
|
||||
|
||||
urb = usb_alloc_urb(0, GFP_KERNEL); /* No ISO */
|
||||
if (urb == NULL) {
|
||||
dbg("%s: alloc for endpoint %d failed.", __func__, endpoint);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* Fill URB using supplied data. */
|
||||
usb_fill_bulk_urb(urb, serial->dev,
|
||||
usb_sndbulkpipe(serial->dev, endpoint) | dir,
|
||||
buf, len, callback, ctx);
|
||||
|
||||
return urb;
|
||||
}
|
||||
|
||||
/* Setup urbs */
|
||||
static void usb_wwan_setup_urbs(struct usb_serial *serial)
|
||||
{
|
||||
int i, j;
|
||||
struct usb_serial_port *port;
|
||||
struct usb_wwan_port_private *portdata;
|
||||
|
||||
dbg("%s", __func__);
|
||||
|
||||
for (i = 0; i < serial->num_ports; i++) {
|
||||
port = serial->port[i];
|
||||
portdata = usb_get_serial_port_data(port);
|
||||
|
||||
/* Do indat endpoints first */
|
||||
for (j = 0; j < N_IN_URB; ++j) {
|
||||
portdata->in_urbs[j] = usb_wwan_setup_urb(serial,
|
||||
port->
|
||||
bulk_in_endpointAddress,
|
||||
USB_DIR_IN,
|
||||
port,
|
||||
portdata->
|
||||
in_buffer[j],
|
||||
IN_BUFLEN,
|
||||
usb_wwan_indat_callback);
|
||||
}
|
||||
|
||||
/* outdat endpoints */
|
||||
for (j = 0; j < N_OUT_URB; ++j) {
|
||||
portdata->out_urbs[j] = usb_wwan_setup_urb(serial,
|
||||
port->
|
||||
bulk_out_endpointAddress,
|
||||
USB_DIR_OUT,
|
||||
port,
|
||||
portdata->
|
||||
out_buffer
|
||||
[j],
|
||||
OUT_BUFLEN,
|
||||
usb_wwan_outdat_callback);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
int usb_wwan_startup(struct usb_serial *serial)
|
||||
{
|
||||
int i, j, err;
|
||||
struct usb_serial_port *port;
|
||||
struct usb_wwan_port_private *portdata;
|
||||
u8 *buffer;
|
||||
|
||||
dbg("%s", __func__);
|
||||
|
||||
/* Now setup per port private data */
|
||||
for (i = 0; i < serial->num_ports; i++) {
|
||||
port = serial->port[i];
|
||||
portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
|
||||
if (!portdata) {
|
||||
dbg("%s: kmalloc for usb_wwan_port_private (%d) failed!.",
|
||||
__func__, i);
|
||||
return 1;
|
||||
}
|
||||
init_usb_anchor(&portdata->delayed);
|
||||
|
||||
for (j = 0; j < N_IN_URB; j++) {
|
||||
buffer = (u8 *) __get_free_page(GFP_KERNEL);
|
||||
if (!buffer)
|
||||
goto bail_out_error;
|
||||
portdata->in_buffer[j] = buffer;
|
||||
}
|
||||
|
||||
for (j = 0; j < N_OUT_URB; j++) {
|
||||
buffer = kmalloc(OUT_BUFLEN, GFP_KERNEL);
|
||||
if (!buffer)
|
||||
goto bail_out_error2;
|
||||
portdata->out_buffer[j] = buffer;
|
||||
}
|
||||
|
||||
usb_set_serial_port_data(port, portdata);
|
||||
|
||||
if (!port->interrupt_in_urb)
|
||||
continue;
|
||||
err = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
|
||||
if (err)
|
||||
dbg("%s: submit irq_in urb failed %d", __func__, err);
|
||||
}
|
||||
usb_wwan_setup_urbs(serial);
|
||||
return 0;
|
||||
|
||||
bail_out_error2:
|
||||
for (j = 0; j < N_OUT_URB; j++)
|
||||
kfree(portdata->out_buffer[j]);
|
||||
bail_out_error:
|
||||
for (j = 0; j < N_IN_URB; j++)
|
||||
if (portdata->in_buffer[j])
|
||||
free_page((unsigned long)portdata->in_buffer[j]);
|
||||
kfree(portdata);
|
||||
return 1;
|
||||
}
|
||||
EXPORT_SYMBOL(usb_wwan_startup);
|
||||
|
||||
static void stop_read_write_urbs(struct usb_serial *serial)
|
||||
{
|
||||
int i, j;
|
||||
struct usb_serial_port *port;
|
||||
struct usb_wwan_port_private *portdata;
|
||||
|
||||
/* Stop reading/writing urbs */
|
||||
for (i = 0; i < serial->num_ports; ++i) {
|
||||
port = serial->port[i];
|
||||
portdata = usb_get_serial_port_data(port);
|
||||
for (j = 0; j < N_IN_URB; j++)
|
||||
usb_kill_urb(portdata->in_urbs[j]);
|
||||
for (j = 0; j < N_OUT_URB; j++)
|
||||
usb_kill_urb(portdata->out_urbs[j]);
|
||||
}
|
||||
}
|
||||
|
||||
void usb_wwan_disconnect(struct usb_serial *serial)
|
||||
{
|
||||
dbg("%s", __func__);
|
||||
|
||||
stop_read_write_urbs(serial);
|
||||
}
|
||||
EXPORT_SYMBOL(usb_wwan_disconnect);
|
||||
|
||||
void usb_wwan_release(struct usb_serial *serial)
|
||||
{
|
||||
int i, j;
|
||||
struct usb_serial_port *port;
|
||||
struct usb_wwan_port_private *portdata;
|
||||
|
||||
dbg("%s", __func__);
|
||||
|
||||
/* Now free them */
|
||||
for (i = 0; i < serial->num_ports; ++i) {
|
||||
port = serial->port[i];
|
||||
portdata = usb_get_serial_port_data(port);
|
||||
|
||||
for (j = 0; j < N_IN_URB; j++) {
|
||||
usb_free_urb(portdata->in_urbs[j]);
|
||||
free_page((unsigned long)
|
||||
portdata->in_buffer[j]);
|
||||
portdata->in_urbs[j] = NULL;
|
||||
}
|
||||
for (j = 0; j < N_OUT_URB; j++) {
|
||||
usb_free_urb(portdata->out_urbs[j]);
|
||||
kfree(portdata->out_buffer[j]);
|
||||
portdata->out_urbs[j] = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
/* Now free per port private data */
|
||||
for (i = 0; i < serial->num_ports; i++) {
|
||||
port = serial->port[i];
|
||||
kfree(usb_get_serial_port_data(port));
|
||||
}
|
||||
}
|
||||
EXPORT_SYMBOL(usb_wwan_release);
|
||||
|
||||
#ifdef CONFIG_PM
|
||||
int usb_wwan_suspend(struct usb_serial *serial, pm_message_t message)
|
||||
{
|
||||
struct usb_wwan_intf_private *intfdata = serial->private;
|
||||
int b;
|
||||
|
||||
dbg("%s entered", __func__);
|
||||
|
||||
if (message.event & PM_EVENT_AUTO) {
|
||||
spin_lock_irq(&intfdata->susp_lock);
|
||||
b = intfdata->in_flight;
|
||||
spin_unlock_irq(&intfdata->susp_lock);
|
||||
|
||||
if (b)
|
||||
return -EBUSY;
|
||||
}
|
||||
|
||||
spin_lock_irq(&intfdata->susp_lock);
|
||||
intfdata->suspended = 1;
|
||||
spin_unlock_irq(&intfdata->susp_lock);
|
||||
stop_read_write_urbs(serial);
|
||||
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL(usb_wwan_suspend);
|
||||
|
||||
static void play_delayed(struct usb_serial_port *port)
|
||||
{
|
||||
struct usb_wwan_intf_private *data;
|
||||
struct usb_wwan_port_private *portdata;
|
||||
struct urb *urb;
|
||||
int err;
|
||||
|
||||
portdata = usb_get_serial_port_data(port);
|
||||
data = port->serial->private;
|
||||
while ((urb = usb_get_from_anchor(&portdata->delayed))) {
|
||||
err = usb_submit_urb(urb, GFP_ATOMIC);
|
||||
if (!err)
|
||||
data->in_flight++;
|
||||
}
|
||||
}
|
||||
|
||||
int usb_wwan_resume(struct usb_serial *serial)
|
||||
{
|
||||
int i, j;
|
||||
struct usb_serial_port *port;
|
||||
struct usb_wwan_intf_private *intfdata = serial->private;
|
||||
struct usb_wwan_port_private *portdata;
|
||||
struct urb *urb;
|
||||
int err = 0;
|
||||
|
||||
dbg("%s entered", __func__);
|
||||
/* get the interrupt URBs resubmitted unconditionally */
|
||||
for (i = 0; i < serial->num_ports; i++) {
|
||||
port = serial->port[i];
|
||||
if (!port->interrupt_in_urb) {
|
||||
dbg("%s: No interrupt URB for port %d", __func__, i);
|
||||
continue;
|
||||
}
|
||||
err = usb_submit_urb(port->interrupt_in_urb, GFP_NOIO);
|
||||
dbg("Submitted interrupt URB for port %d (result %d)", i, err);
|
||||
if (err < 0) {
|
||||
err("%s: Error %d for interrupt URB of port%d",
|
||||
__func__, err, i);
|
||||
goto err_out;
|
||||
}
|
||||
}
|
||||
|
||||
for (i = 0; i < serial->num_ports; i++) {
|
||||
/* walk all ports */
|
||||
port = serial->port[i];
|
||||
portdata = usb_get_serial_port_data(port);
|
||||
|
||||
/* skip closed ports */
|
||||
spin_lock_irq(&intfdata->susp_lock);
|
||||
if (!portdata->opened) {
|
||||
spin_unlock_irq(&intfdata->susp_lock);
|
||||
continue;
|
||||
}
|
||||
|
||||
for (j = 0; j < N_IN_URB; j++) {
|
||||
urb = portdata->in_urbs[j];
|
||||
err = usb_submit_urb(urb, GFP_ATOMIC);
|
||||
if (err < 0) {
|
||||
err("%s: Error %d for bulk URB %d",
|
||||
__func__, err, i);
|
||||
spin_unlock_irq(&intfdata->susp_lock);
|
||||
goto err_out;
|
||||
}
|
||||
}
|
||||
play_delayed(port);
|
||||
spin_unlock_irq(&intfdata->susp_lock);
|
||||
}
|
||||
spin_lock_irq(&intfdata->susp_lock);
|
||||
intfdata->suspended = 0;
|
||||
spin_unlock_irq(&intfdata->susp_lock);
|
||||
err_out:
|
||||
return err;
|
||||
}
|
||||
EXPORT_SYMBOL(usb_wwan_resume);
|
||||
#endif
|
||||
|
||||
MODULE_AUTHOR(DRIVER_AUTHOR);
|
||||
MODULE_DESCRIPTION(DRIVER_DESC);
|
||||
MODULE_VERSION(DRIVER_VERSION);
|
||||
MODULE_LICENSE("GPL");
|
||||
|
||||
module_param(debug, bool, S_IRUGO | S_IWUSR);
|
||||
MODULE_PARM_DESC(debug, "Debug messages");
|
||||
Loading…
Reference in New Issue
Block a user