usb serial: Add generic USB wwan support (0d456194) · Commits · e / devices / android_kernel_teracube_2e

drivers/usb/serial/Kconfig

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Original line number	Original line	Diff line number	Diff line
	@@ -576,6 +576,9 @@ config USB_SERIAL_XIRCOM
	To compile this driver as a module, choose M here: the		To compile this driver as a module, choose M here: the
	module will be called keyspan_pda.		module will be called keyspan_pda.

			config USB_SERIAL_WWAN
			tristate

	config USB_SERIAL_OPTION		config USB_SERIAL_OPTION
	tristate "USB driver for GSM and CDMA modems"		tristate "USB driver for GSM and CDMA modems"
	help		help

drivers/usb/serial/Makefile

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -52,6 +52,7 @@ obj-$(CONFIG_USB_SERIAL_SIEMENS_MPI) += siemens_mpi.o
	obj-$(CONFIG_USB_SERIAL_SIERRAWIRELESS) += sierra.o		obj-$(CONFIG_USB_SERIAL_SIERRAWIRELESS) += sierra.o
	obj-$(CONFIG_USB_SERIAL_SPCP8X5) += spcp8x5.o		obj-$(CONFIG_USB_SERIAL_SPCP8X5) += spcp8x5.o
	obj-$(CONFIG_USB_SERIAL_SYMBOL) += symbolserial.o		obj-$(CONFIG_USB_SERIAL_SYMBOL) += symbolserial.o
			obj-$(CONFIG_USB_SERIAL_WWAN) += usb_wwan.o
	obj-$(CONFIG_USB_SERIAL_TI) += ti_usb_3410_5052.o		obj-$(CONFIG_USB_SERIAL_TI) += ti_usb_3410_5052.o
	obj-$(CONFIG_USB_SERIAL_VISOR) += visor.o		obj-$(CONFIG_USB_SERIAL_VISOR) += visor.o
	obj-$(CONFIG_USB_SERIAL_WHITEHEAT) += whiteheat.o		obj-$(CONFIG_USB_SERIAL_WHITEHEAT) += whiteheat.o

drivers/usb/serial/usb-wwan.h

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			/*
			* Definitions for USB serial mobile broadband cards
			*/

			#ifndef __LINUX_USB_USB_WWAN
			#define __LINUX_USB_USB_WWAN

			extern void usb_wwan_dtr_rts(struct usb_serial_port *port, int on);
			extern int usb_wwan_open(struct tty_struct tty, struct usb_serial_port port);
			extern void usb_wwan_close(struct usb_serial_port *port);
			extern int usb_wwan_startup(struct usb_serial *serial);
			extern void usb_wwan_disconnect(struct usb_serial *serial);
			extern void usb_wwan_release(struct usb_serial *serial);
			extern int usb_wwan_write_room(struct tty_struct *tty);
			extern void usb_wwan_set_termios(struct tty_struct *tty,
			struct usb_serial_port *port,
			struct ktermios *old);
			extern int usb_wwan_tiocmget(struct tty_struct tty, struct file file);
			extern int usb_wwan_tiocmset(struct tty_struct tty, struct file file,
			unsigned int set, unsigned int clear);
			extern int usb_wwan_send_setup(struct usb_serial_port *port);
			extern int usb_wwan_write(struct tty_struct tty, struct usb_serial_port port,
			const unsigned char *buf, int count);
			extern int usb_wwan_chars_in_buffer(struct tty_struct *tty);
			#ifdef CONFIG_PM
			extern int usb_wwan_suspend(struct usb_serial *serial, pm_message_t message);
			extern int usb_wwan_resume(struct usb_serial *serial);
			#endif

			/* per port private data */

			#define N_IN_URB 4
			#define N_OUT_URB 4
			#define IN_BUFLEN 4096
			#define OUT_BUFLEN 4096

			struct usb_wwan_intf_private {
			spinlock_t susp_lock;
			unsigned int suspended:1;
			int in_flight;
			int (send_setup) (struct usb_serial_port port);
			void *private;
			};

			struct usb_wwan_port_private {
			/* Input endpoints and buffer for this port */
			struct urb *in_urbs[N_IN_URB];
			u8 *in_buffer[N_IN_URB];
			/* Output endpoints and buffer for this port */
			struct urb *out_urbs[N_OUT_URB];
			u8 *out_buffer[N_OUT_URB];
			unsigned long out_busy; /* Bit vector of URBs in use */
			int opened;
			struct usb_anchor delayed;

			/* Settings for the port */
			int rts_state; /* Handshaking pins (outputs) */
			int dtr_state;
			int cts_state; /* Handshaking pins (inputs) */
			int dsr_state;
			int dcd_state;
			int ri_state;

			unsigned long tx_start_time[N_OUT_URB];
			};

			#endif /* __LINUX_USB_USB_WWAN */

drivers/usb/serial/usb_wwan.c

0 → 100644

+665 −0

Original line number	Original line	Diff line number	Diff line
			/*
			USB Driver layer for GSM modems

			Copyright (C) 2005 Matthias Urlichs <smurf@smurf.noris.de>

			This driver is free software; you can redistribute it and/or modify
			it under the terms of Version 2 of the GNU General Public License as
			published by the Free Software Foundation.

			Portions copied from the Keyspan driver by Hugh Blemings <hugh@blemings.org>

			History: see the git log.

			Work sponsored by: Sigos GmbH, Germany <info@sigos.de>

			This driver exists because the "normal" serial driver doesn't work too well
			with GSM modems. Issues:
			- data loss -- one single Receive URB is not nearly enough
			- controlling the baud rate doesn't make sense
			*/

			#define DRIVER_VERSION "v0.7.2"
			#define DRIVER_AUTHOR "Matthias Urlichs <smurf@smurf.noris.de>"
			#define DRIVER_DESC "USB Driver for GSM modems"

			#include <linux/kernel.h>
			#include <linux/jiffies.h>
			#include <linux/errno.h>
			#include <linux/slab.h>
			#include <linux/tty.h>
			#include <linux/tty_flip.h>
			#include <linux/module.h>
			#include <linux/bitops.h>
			#include <linux/usb.h>
			#include <linux/usb/serial.h>
			#include "usb-wwan.h"

			static int debug;

			void usb_wwan_dtr_rts(struct usb_serial_port *port, int on)
			{
			struct usb_serial *serial = port->serial;
			struct usb_wwan_port_private *portdata;

			struct usb_wwan_intf_private *intfdata;

			dbg("%s", __func__);

			intfdata = port->serial->private;

			if (!intfdata->send_setup)
			return;

			portdata = usb_get_serial_port_data(port);
			mutex_lock(&serial->disc_mutex);
			portdata->rts_state = on;
			portdata->dtr_state = on;
			if (serial->dev)
			intfdata->send_setup(port);
			mutex_unlock(&serial->disc_mutex);
			}
			EXPORT_SYMBOL(usb_wwan_dtr_rts);

			void usb_wwan_set_termios(struct tty_struct *tty,
			struct usb_serial_port *port,
			struct ktermios *old_termios)
			{
			struct usb_wwan_intf_private *intfdata = port->serial->private;

			dbg("%s", __func__);

			/* Doesn't support option setting */
			tty_termios_copy_hw(tty->termios, old_termios);

			if (intfdata->send_setup)
			intfdata->send_setup(port);
			}
			EXPORT_SYMBOL(usb_wwan_set_termios);

			int usb_wwan_tiocmget(struct tty_struct tty, struct file file)
			{
			struct usb_serial_port *port = tty->driver_data;
			unsigned int value;
			struct usb_wwan_port_private *portdata;

			portdata = usb_get_serial_port_data(port);

			value = ((portdata->rts_state) ? TIOCM_RTS : 0) \|
			((portdata->dtr_state) ? TIOCM_DTR : 0) \|
			((portdata->cts_state) ? TIOCM_CTS : 0) \|
			((portdata->dsr_state) ? TIOCM_DSR : 0) \|
			((portdata->dcd_state) ? TIOCM_CAR : 0) \|
			((portdata->ri_state) ? TIOCM_RNG : 0);

			return value;
			}
			EXPORT_SYMBOL(usb_wwan_tiocmget);

			int usb_wwan_tiocmset(struct tty_struct tty, struct file file,
			unsigned int set, unsigned int clear)
			{
			struct usb_serial_port *port = tty->driver_data;
			struct usb_wwan_port_private *portdata;
			struct usb_wwan_intf_private *intfdata;

			portdata = usb_get_serial_port_data(port);
			intfdata = port->serial->private;

			if (!intfdata->send_setup)
			return -EINVAL;

			/* FIXME: what locks portdata fields ? */
			if (set & TIOCM_RTS)
			portdata->rts_state = 1;
			if (set & TIOCM_DTR)
			portdata->dtr_state = 1;

			if (clear & TIOCM_RTS)
			portdata->rts_state = 0;
			if (clear & TIOCM_DTR)
			portdata->dtr_state = 0;
			return intfdata->send_setup(port);
			}
			EXPORT_SYMBOL(usb_wwan_tiocmset);

			/* Write */
			int usb_wwan_write(struct tty_struct tty, struct usb_serial_port port,
			const unsigned char *buf, int count)
			{
			struct usb_wwan_port_private *portdata;
			struct usb_wwan_intf_private *intfdata;
			int i;
			int left, todo;
			struct urb this_urb = NULL; / spurious */
			int err;
			unsigned long flags;

			portdata = usb_get_serial_port_data(port);
			intfdata = port->serial->private;

			dbg("%s: write (%d chars)", __func__, count);

			i = 0;
			left = count;
			for (i = 0; left > 0 && i < N_OUT_URB; i++) {
			todo = left;
			if (todo > OUT_BUFLEN)
			todo = OUT_BUFLEN;

			this_urb = portdata->out_urbs[i];
			if (test_and_set_bit(i, &portdata->out_busy)) {
			if (time_before(jiffies,
			portdata->tx_start_time[i] + 10 * HZ))
			continue;
			usb_unlink_urb(this_urb);
			continue;
			}
			dbg("%s: endpoint %d buf %d", __func__,
			usb_pipeendpoint(this_urb->pipe), i);

			err = usb_autopm_get_interface_async(port->serial->interface);
			if (err < 0)
			break;

			/* send the data */
			memcpy(this_urb->transfer_buffer, buf, todo);
			this_urb->transfer_buffer_length = todo;

			spin_lock_irqsave(&intfdata->susp_lock, flags);
			if (intfdata->suspended) {
			usb_anchor_urb(this_urb, &portdata->delayed);
			spin_unlock_irqrestore(&intfdata->susp_lock, flags);
			} else {
			intfdata->in_flight++;
			spin_unlock_irqrestore(&intfdata->susp_lock, flags);
			err = usb_submit_urb(this_urb, GFP_ATOMIC);
			if (err) {
			dbg("usb_submit_urb %p (write bulk) failed "
			"(%d)", this_urb, err);
			clear_bit(i, &portdata->out_busy);
			spin_lock_irqsave(&intfdata->susp_lock, flags);
			intfdata->in_flight--;
			spin_unlock_irqrestore(&intfdata->susp_lock,
			flags);
			continue;
			}
			}

			portdata->tx_start_time[i] = jiffies;
			buf += todo;
			left -= todo;
			}

			count -= left;
			dbg("%s: wrote (did %d)", __func__, count);
			return count;
			}
			EXPORT_SYMBOL(usb_wwan_write);

			static void usb_wwan_indat_callback(struct urb *urb)
			{
			int err;
			int endpoint;
			struct usb_serial_port *port;
			struct tty_struct *tty;
			unsigned char *data = urb->transfer_buffer;
			int status = urb->status;

			dbg("%s: %p", __func__, urb);

			endpoint = usb_pipeendpoint(urb->pipe);
			port = urb->context;

			if (status) {
			dbg("%s: nonzero status: %d on endpoint %02x.",
			__func__, status, endpoint);
			} else {
			tty = tty_port_tty_get(&port->port);
			if (urb->actual_length) {
			tty_insert_flip_string(tty, data, urb->actual_length);
			tty_flip_buffer_push(tty);
			} else
			dbg("%s: empty read urb received", __func__);
			tty_kref_put(tty);

			/* Resubmit urb so we continue receiving */
			if (status != -ESHUTDOWN) {
			err = usb_submit_urb(urb, GFP_ATOMIC);
			if (err && err != -EPERM)
			printk(KERN_ERR "%s: resubmit read urb failed. "
			"(%d)", __func__, err);
			else
			usb_mark_last_busy(port->serial->dev);
			}

			}
			return;
			}

			static void usb_wwan_outdat_callback(struct urb *urb)
			{
			struct usb_serial_port *port;
			struct usb_wwan_port_private *portdata;
			struct usb_wwan_intf_private *intfdata;
			int i;

			dbg("%s", __func__);

			port = urb->context;
			intfdata = port->serial->private;

			usb_serial_port_softint(port);
			usb_autopm_put_interface_async(port->serial->interface);
			portdata = usb_get_serial_port_data(port);
			spin_lock(&intfdata->susp_lock);
			intfdata->in_flight--;
			spin_unlock(&intfdata->susp_lock);

			for (i = 0; i < N_OUT_URB; ++i) {
			if (portdata->out_urbs[i] == urb) {
			smp_mb__before_clear_bit();
			clear_bit(i, &portdata->out_busy);
			break;
			}
			}
			}

			int usb_wwan_write_room(struct tty_struct *tty)
			{
			struct usb_serial_port *port = tty->driver_data;
			struct usb_wwan_port_private *portdata;
			int i;
			int data_len = 0;
			struct urb *this_urb;

			portdata = usb_get_serial_port_data(port);

			for (i = 0; i < N_OUT_URB; i++) {
			this_urb = portdata->out_urbs[i];
			if (this_urb && !test_bit(i, &portdata->out_busy))
			data_len += OUT_BUFLEN;
			}

			dbg("%s: %d", __func__, data_len);
			return data_len;
			}
			EXPORT_SYMBOL(usb_wwan_write_room);

			int usb_wwan_chars_in_buffer(struct tty_struct *tty)
			{
			struct usb_serial_port *port = tty->driver_data;
			struct usb_wwan_port_private *portdata;
			int i;
			int data_len = 0;
			struct urb *this_urb;

			portdata = usb_get_serial_port_data(port);

			for (i = 0; i < N_OUT_URB; i++) {
			this_urb = portdata->out_urbs[i];
			/* FIXME: This locking is insufficient as this_urb may
			go unused during the test */
			if (this_urb && test_bit(i, &portdata->out_busy))
			data_len += this_urb->transfer_buffer_length;
			}
			dbg("%s: %d", __func__, data_len);
			return data_len;
			}
			EXPORT_SYMBOL(usb_wwan_chars_in_buffer);

			int usb_wwan_open(struct tty_struct tty, struct usb_serial_port port)
			{
			struct usb_wwan_port_private *portdata;
			struct usb_wwan_intf_private *intfdata;
			struct usb_serial *serial = port->serial;
			int i, err;
			struct urb *urb;

			portdata = usb_get_serial_port_data(port);
			intfdata = serial->private;

			dbg("%s", __func__);

			/* Start reading from the IN endpoint */
			for (i = 0; i < N_IN_URB; i++) {
			urb = portdata->in_urbs[i];
			if (!urb)
			continue;
			err = usb_submit_urb(urb, GFP_KERNEL);
			if (err) {
			dbg("%s: submit urb %d failed (%d) %d",
			__func__, i, err, urb->transfer_buffer_length);
			}
			}

			if (intfdata->send_setup)
			intfdata->send_setup(port);

			serial->interface->needs_remote_wakeup = 1;
			spin_lock_irq(&intfdata->susp_lock);
			portdata->opened = 1;
			spin_unlock_irq(&intfdata->susp_lock);
			usb_autopm_put_interface(serial->interface);

			return 0;
			}
			EXPORT_SYMBOL(usb_wwan_open);

			void usb_wwan_close(struct usb_serial_port *port)
			{
			int i;
			struct usb_serial *serial = port->serial;
			struct usb_wwan_port_private *portdata;
			struct usb_wwan_intf_private *intfdata = port->serial->private;

			dbg("%s", __func__);
			portdata = usb_get_serial_port_data(port);

			if (serial->dev) {
			/* Stop reading/writing urbs */
			spin_lock_irq(&intfdata->susp_lock);
			portdata->opened = 0;
			spin_unlock_irq(&intfdata->susp_lock);

			for (i = 0; i < N_IN_URB; i++)
			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");