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cac6fb015f
The WWAN framework provides a unified way to handle WWAN/modems and its
control port(s). It has initially been introduced to support MHI/PCI
modems, offering the same control protocols as the USB variants such as
MBIM, QMI, AT... The WWAN framework exposes these control protocols as
character devices, similarly to cdc-wdm, but in a bus agnostic fashion.
This change adds registration of the USB modem cdc-wdm control endpoints
to the WWAN framework as standard control ports (wwanXpY...).
Exposing cdc-wdm through WWAN framework normally maintains backward
compatibility, e.g:
$ qmicli --device-open-qmi -d /dev/wwan0p1QMI --dms-get-ids
instead of
$ qmicli --device-open-qmi -d /dev/cdc-wdm0 --dms-get-ids
However, some tools may rely on cdc-wdm driver/device name for device
detection. It is then safer to keep the 'legacy' cdc-wdm character
device to prevent any breakage. This is handled in this change by
API mutual exclusion, only one access method can be used at a time,
either cdc-wdm chardev or WWAN API.
Note that unknown channel types (other than MBIM, AT or MBIM) are not
registered to the WWAN framework.
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
23 lines
701 B
C
23 lines
701 B
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* USB CDC Device Management subdriver
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*
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* Copyright (c) 2012 Bjørn Mork <bjorn@mork.no>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*/
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#ifndef __LINUX_USB_CDC_WDM_H
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#define __LINUX_USB_CDC_WDM_H
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#include <linux/wwan.h>
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#include <uapi/linux/usb/cdc-wdm.h>
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extern struct usb_driver *usb_cdc_wdm_register(struct usb_interface *intf,
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struct usb_endpoint_descriptor *ep,
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int bufsize, enum wwan_port_type type,
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int (*manage_power)(struct usb_interface *, int));
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#endif /* __LINUX_USB_CDC_WDM_H */
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