730 lines
18 KiB
C
730 lines
18 KiB
C
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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_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/uaccess.h>
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#include <linux/usb.h>
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#include <linux/usb/serial.h>
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#include <linux/serial.h>
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#include "usb-wwan.h"
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/*
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* Generate DTR/RTS signals on the port using the SET_CONTROL_LINE_STATE request
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* in CDC ACM.
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*/
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static int usb_wwan_send_setup(struct usb_serial_port *port)
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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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int val = 0;
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int ifnum;
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int res;
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portdata = usb_get_serial_port_data(port);
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if (portdata->dtr_state)
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val |= 0x01;
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if (portdata->rts_state)
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val |= 0x02;
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ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
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res = usb_autopm_get_interface(serial->interface);
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if (res)
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return res;
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res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
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0x22, 0x21, val, ifnum, NULL, 0,
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USB_CTRL_SET_TIMEOUT);
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usb_autopm_put_interface(port->serial->interface);
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return res;
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}
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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_wwan_port_private *portdata;
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struct usb_wwan_intf_private *intfdata;
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intfdata = usb_get_serial_data(port->serial);
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if (!intfdata->use_send_setup)
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return;
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portdata = usb_get_serial_port_data(port);
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/* FIXME: locking */
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portdata->rts_state = on;
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portdata->dtr_state = on;
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usb_wwan_send_setup(port);
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}
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EXPORT_SYMBOL(usb_wwan_dtr_rts);
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int usb_wwan_tiocmget(struct tty_struct *tty)
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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,
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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 = usb_get_serial_data(port->serial);
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if (!intfdata->use_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 usb_wwan_send_setup(port);
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}
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EXPORT_SYMBOL(usb_wwan_tiocmset);
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static int get_serial_info(struct usb_serial_port *port,
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struct serial_struct __user *retinfo)
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{
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struct serial_struct tmp;
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if (!retinfo)
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return -EFAULT;
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memset(&tmp, 0, sizeof(tmp));
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tmp.line = port->minor;
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tmp.port = port->port_number;
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tmp.baud_base = tty_get_baud_rate(port->port.tty);
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tmp.close_delay = port->port.close_delay / 10;
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tmp.closing_wait = port->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
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ASYNC_CLOSING_WAIT_NONE :
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port->port.closing_wait / 10;
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if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
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return -EFAULT;
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return 0;
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}
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static int set_serial_info(struct usb_serial_port *port,
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struct serial_struct __user *newinfo)
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{
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struct serial_struct new_serial;
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unsigned int closing_wait, close_delay;
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int retval = 0;
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if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
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return -EFAULT;
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close_delay = new_serial.close_delay * 10;
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closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ?
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ASYNC_CLOSING_WAIT_NONE : new_serial.closing_wait * 10;
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mutex_lock(&port->port.mutex);
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if (!capable(CAP_SYS_ADMIN)) {
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if ((close_delay != port->port.close_delay) ||
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(closing_wait != port->port.closing_wait))
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retval = -EPERM;
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else
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retval = -EOPNOTSUPP;
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} else {
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port->port.close_delay = close_delay;
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port->port.closing_wait = closing_wait;
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}
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mutex_unlock(&port->port.mutex);
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return retval;
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}
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int usb_wwan_ioctl(struct tty_struct *tty,
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unsigned int cmd, unsigned long arg)
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{
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struct usb_serial_port *port = tty->driver_data;
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dev_dbg(&port->dev, "%s cmd 0x%04x\n", __func__, cmd);
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switch (cmd) {
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case TIOCGSERIAL:
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return get_serial_info(port,
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(struct serial_struct __user *) arg);
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case TIOCSSERIAL:
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return set_serial_info(port,
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(struct serial_struct __user *) arg);
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default:
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break;
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}
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dev_dbg(&port->dev, "%s arg not supported\n", __func__);
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return -ENOIOCTLCMD;
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}
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EXPORT_SYMBOL(usb_wwan_ioctl);
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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 = usb_get_serial_data(port->serial);
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dev_dbg(&port->dev, "%s: write (%d chars)\n", __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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dev_dbg(&port->dev, "%s: endpoint %d buf %d\n", __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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clear_bit(i, &portdata->out_busy);
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break;
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}
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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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dev_err(&port->dev,
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"%s: submit urb %d failed: %d\n",
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__func__, i, 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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usb_autopm_put_interface_async(port->serial->interface);
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break;
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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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dev_dbg(&port->dev, "%s: wrote (did %d)\n", __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 device *dev;
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unsigned char *data = urb->transfer_buffer;
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int status = urb->status;
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endpoint = usb_pipeendpoint(urb->pipe);
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port = urb->context;
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dev = &port->dev;
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if (status) {
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dev_dbg(dev, "%s: nonzero status: %d on endpoint %02x.\n",
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__func__, status, endpoint);
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} else {
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if (urb->actual_length) {
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tty_insert_flip_string(&port->port, data,
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urb->actual_length);
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tty_flip_buffer_push(&port->port);
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} else
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dev_dbg(dev, "%s: empty read urb received\n", __func__);
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}
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/* Resubmit urb so we continue receiving */
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err = usb_submit_urb(urb, GFP_ATOMIC);
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if (err) {
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if (err != -EPERM && err != -ENODEV) {
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dev_err(dev, "%s: resubmit read urb failed. (%d)\n",
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__func__, err);
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/* busy also in error unless we are killed */
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usb_mark_last_busy(port->serial->dev);
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}
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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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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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port = urb->context;
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intfdata = usb_get_serial_data(port->serial);
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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_atomic();
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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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|
||
|
|
dev_dbg(&port->dev, "%s: %d\n", __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;
|
||
|
|
}
|
||
|
|
dev_dbg(&port->dev, "%s: %d\n", __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 = usb_get_serial_data(serial);
|
||
|
|
|
||
|
|
if (port->interrupt_in_urb) {
|
||
|
|
err = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
|
||
|
|
if (err) {
|
||
|
|
dev_err(&port->dev, "%s: submit int urb failed: %d\n",
|
||
|
|
__func__, err);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* 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) {
|
||
|
|
dev_err(&port->dev,
|
||
|
|
"%s: submit read urb %d failed: %d\n",
|
||
|
|
__func__, i, err);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
spin_lock_irq(&intfdata->susp_lock);
|
||
|
|
if (++intfdata->open_ports == 1)
|
||
|
|
serial->interface->needs_remote_wakeup = 1;
|
||
|
|
spin_unlock_irq(&intfdata->susp_lock);
|
||
|
|
/* this balances a get in the generic USB serial code */
|
||
|
|
usb_autopm_put_interface(serial->interface);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(usb_wwan_open);
|
||
|
|
|
||
|
|
static void unbusy_queued_urb(struct urb *urb,
|
||
|
|
struct usb_wwan_port_private *portdata)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
|
||
|
|
for (i = 0; i < N_OUT_URB; i++) {
|
||
|
|
if (urb == portdata->out_urbs[i]) {
|
||
|
|
clear_bit(i, &portdata->out_busy);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
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 = usb_get_serial_data(serial);
|
||
|
|
struct urb *urb;
|
||
|
|
|
||
|
|
portdata = usb_get_serial_port_data(port);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Need to take susp_lock to make sure port is not already being
|
||
|
|
* resumed, but no need to hold it due to initialized
|
||
|
|
*/
|
||
|
|
spin_lock_irq(&intfdata->susp_lock);
|
||
|
|
if (--intfdata->open_ports == 0)
|
||
|
|
serial->interface->needs_remote_wakeup = 0;
|
||
|
|
spin_unlock_irq(&intfdata->susp_lock);
|
||
|
|
|
||
|
|
for (;;) {
|
||
|
|
urb = usb_get_from_anchor(&portdata->delayed);
|
||
|
|
if (!urb)
|
||
|
|
break;
|
||
|
|
unbusy_queued_urb(urb, portdata);
|
||
|
|
usb_autopm_put_interface_async(serial->interface);
|
||
|
|
}
|
||
|
|
|
||
|
|
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_kill_urb(port->interrupt_in_urb);
|
||
|
|
|
||
|
|
usb_autopm_get_interface_no_resume(serial->interface);
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(usb_wwan_close);
|
||
|
|
|
||
|
|
static struct urb *usb_wwan_setup_urb(struct usb_serial_port *port,
|
||
|
|
int endpoint,
|
||
|
|
int dir, void *ctx, char *buf, int len,
|
||
|
|
void (*callback) (struct urb *))
|
||
|
|
{
|
||
|
|
struct usb_serial *serial = port->serial;
|
||
|
|
struct urb *urb;
|
||
|
|
|
||
|
|
urb = usb_alloc_urb(0, GFP_KERNEL); /* No ISO */
|
||
|
|
if (!urb)
|
||
|
|
return NULL;
|
||
|
|
|
||
|
|
usb_fill_bulk_urb(urb, serial->dev,
|
||
|
|
usb_sndbulkpipe(serial->dev, endpoint) | dir,
|
||
|
|
buf, len, callback, ctx);
|
||
|
|
|
||
|
|
return urb;
|
||
|
|
}
|
||
|
|
|
||
|
|
int usb_wwan_port_probe(struct usb_serial_port *port)
|
||
|
|
{
|
||
|
|
struct usb_wwan_port_private *portdata;
|
||
|
|
struct urb *urb;
|
||
|
|
u8 *buffer;
|
||
|
|
int i;
|
||
|
|
|
||
|
|
if (!port->bulk_in_size || !port->bulk_out_size)
|
||
|
|
return -ENODEV;
|
||
|
|
|
||
|
|
portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
|
||
|
|
if (!portdata)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
init_usb_anchor(&portdata->delayed);
|
||
|
|
|
||
|
|
for (i = 0; i < N_IN_URB; i++) {
|
||
|
|
buffer = (u8 *)__get_free_page(GFP_KERNEL);
|
||
|
|
if (!buffer)
|
||
|
|
goto bail_out_error;
|
||
|
|
portdata->in_buffer[i] = buffer;
|
||
|
|
|
||
|
|
urb = usb_wwan_setup_urb(port, port->bulk_in_endpointAddress,
|
||
|
|
USB_DIR_IN, port,
|
||
|
|
buffer, IN_BUFLEN,
|
||
|
|
usb_wwan_indat_callback);
|
||
|
|
portdata->in_urbs[i] = urb;
|
||
|
|
}
|
||
|
|
|
||
|
|
for (i = 0; i < N_OUT_URB; i++) {
|
||
|
|
buffer = kmalloc(OUT_BUFLEN, GFP_KERNEL);
|
||
|
|
if (!buffer)
|
||
|
|
goto bail_out_error2;
|
||
|
|
portdata->out_buffer[i] = buffer;
|
||
|
|
|
||
|
|
urb = usb_wwan_setup_urb(port, port->bulk_out_endpointAddress,
|
||
|
|
USB_DIR_OUT, port,
|
||
|
|
buffer, OUT_BUFLEN,
|
||
|
|
usb_wwan_outdat_callback);
|
||
|
|
portdata->out_urbs[i] = urb;
|
||
|
|
}
|
||
|
|
|
||
|
|
usb_set_serial_port_data(port, portdata);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
bail_out_error2:
|
||
|
|
for (i = 0; i < N_OUT_URB; i++) {
|
||
|
|
usb_free_urb(portdata->out_urbs[i]);
|
||
|
|
kfree(portdata->out_buffer[i]);
|
||
|
|
}
|
||
|
|
bail_out_error:
|
||
|
|
for (i = 0; i < N_IN_URB; i++) {
|
||
|
|
usb_free_urb(portdata->in_urbs[i]);
|
||
|
|
free_page((unsigned long)portdata->in_buffer[i]);
|
||
|
|
}
|
||
|
|
kfree(portdata);
|
||
|
|
|
||
|
|
return -ENOMEM;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(usb_wwan_port_probe);
|
||
|
|
|
||
|
|
int usb_wwan_port_remove(struct usb_serial_port *port)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
struct usb_wwan_port_private *portdata;
|
||
|
|
|
||
|
|
portdata = usb_get_serial_port_data(port);
|
||
|
|
usb_set_serial_port_data(port, NULL);
|
||
|
|
|
||
|
|
for (i = 0; i < N_IN_URB; i++) {
|
||
|
|
usb_free_urb(portdata->in_urbs[i]);
|
||
|
|
free_page((unsigned long)portdata->in_buffer[i]);
|
||
|
|
}
|
||
|
|
for (i = 0; i < N_OUT_URB; i++) {
|
||
|
|
usb_free_urb(portdata->out_urbs[i]);
|
||
|
|
kfree(portdata->out_buffer[i]);
|
||
|
|
}
|
||
|
|
|
||
|
|
kfree(portdata);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(usb_wwan_port_remove);
|
||
|
|
|
||
|
|
#ifdef CONFIG_PM
|
||
|
|
static void stop_urbs(struct usb_serial *serial)
|
||
|
|
{
|
||
|
|
int i, j;
|
||
|
|
struct usb_serial_port *port;
|
||
|
|
struct usb_wwan_port_private *portdata;
|
||
|
|
|
||
|
|
for (i = 0; i < serial->num_ports; ++i) {
|
||
|
|
port = serial->port[i];
|
||
|
|
portdata = usb_get_serial_port_data(port);
|
||
|
|
if (!portdata)
|
||
|
|
continue;
|
||
|
|
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]);
|
||
|
|
usb_kill_urb(port->interrupt_in_urb);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
int usb_wwan_suspend(struct usb_serial *serial, pm_message_t message)
|
||
|
|
{
|
||
|
|
struct usb_wwan_intf_private *intfdata = usb_get_serial_data(serial);
|
||
|
|
|
||
|
|
spin_lock_irq(&intfdata->susp_lock);
|
||
|
|
if (PMSG_IS_AUTO(message)) {
|
||
|
|
if (intfdata->in_flight) {
|
||
|
|
spin_unlock_irq(&intfdata->susp_lock);
|
||
|
|
return -EBUSY;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
intfdata->suspended = 1;
|
||
|
|
spin_unlock_irq(&intfdata->susp_lock);
|
||
|
|
|
||
|
|
stop_urbs(serial);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(usb_wwan_suspend);
|
||
|
|
|
||
|
|
/* Caller must hold susp_lock. */
|
||
|
|
static int usb_wwan_submit_delayed_urbs(struct usb_serial_port *port)
|
||
|
|
{
|
||
|
|
struct usb_serial *serial = port->serial;
|
||
|
|
struct usb_wwan_intf_private *data = usb_get_serial_data(serial);
|
||
|
|
struct usb_wwan_port_private *portdata;
|
||
|
|
struct urb *urb;
|
||
|
|
int err_count = 0;
|
||
|
|
int err;
|
||
|
|
|
||
|
|
portdata = usb_get_serial_port_data(port);
|
||
|
|
|
||
|
|
for (;;) {
|
||
|
|
urb = usb_get_from_anchor(&portdata->delayed);
|
||
|
|
if (!urb)
|
||
|
|
break;
|
||
|
|
|
||
|
|
err = usb_submit_urb(urb, GFP_ATOMIC);
|
||
|
|
if (err) {
|
||
|
|
dev_err(&port->dev, "%s: submit urb failed: %d\n",
|
||
|
|
__func__, err);
|
||
|
|
err_count++;
|
||
|
|
unbusy_queued_urb(urb, portdata);
|
||
|
|
usb_autopm_put_interface_async(serial->interface);
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
data->in_flight++;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (err_count)
|
||
|
|
return -EIO;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int usb_wwan_resume(struct usb_serial *serial)
|
||
|
|
{
|
||
|
|
int i, j;
|
||
|
|
struct usb_serial_port *port;
|
||
|
|
struct usb_wwan_intf_private *intfdata = usb_get_serial_data(serial);
|
||
|
|
struct usb_wwan_port_private *portdata;
|
||
|
|
struct urb *urb;
|
||
|
|
int err;
|
||
|
|
int err_count = 0;
|
||
|
|
|
||
|
|
spin_lock_irq(&intfdata->susp_lock);
|
||
|
|
for (i = 0; i < serial->num_ports; i++) {
|
||
|
|
port = serial->port[i];
|
||
|
|
|
||
|
|
if (!tty_port_initialized(&port->port))
|
||
|
|
continue;
|
||
|
|
|
||
|
|
portdata = usb_get_serial_port_data(port);
|
||
|
|
|
||
|
|
if (port->interrupt_in_urb) {
|
||
|
|
err = usb_submit_urb(port->interrupt_in_urb,
|
||
|
|
GFP_ATOMIC);
|
||
|
|
if (err) {
|
||
|
|
dev_err(&port->dev,
|
||
|
|
"%s: submit int urb failed: %d\n",
|
||
|
|
__func__, err);
|
||
|
|
err_count++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
err = usb_wwan_submit_delayed_urbs(port);
|
||
|
|
if (err)
|
||
|
|
err_count++;
|
||
|
|
|
||
|
|
for (j = 0; j < N_IN_URB; j++) {
|
||
|
|
urb = portdata->in_urbs[j];
|
||
|
|
err = usb_submit_urb(urb, GFP_ATOMIC);
|
||
|
|
if (err < 0) {
|
||
|
|
dev_err(&port->dev,
|
||
|
|
"%s: submit read urb %d failed: %d\n",
|
||
|
|
__func__, i, err);
|
||
|
|
err_count++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
intfdata->suspended = 0;
|
||
|
|
spin_unlock_irq(&intfdata->susp_lock);
|
||
|
|
|
||
|
|
if (err_count)
|
||
|
|
return -EIO;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(usb_wwan_resume);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
MODULE_AUTHOR(DRIVER_AUTHOR);
|
||
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
||
|
|
MODULE_LICENSE("GPL");
|