Stephan Gerhold
681d5d29d5
Recent Linux kernel versions have introduced a generic WWAN subsystem
that provides various char devices for QMI, AT etc, similar to the
subsystem-specific char devices for USB or RPMSG.
The RPMSG char device for Qualcomm SoCs (e.g. MSM8916/MSM8974)
are particularly complicated to work with because they need to be
explicitly created from userspace with rpmsgexport and don't show up
automatically.
However, it turns out it's fairly simple to wrap the RPMSG subsystem
in a simple driver for the WWAN subsystem. This has several advantages:
- We can drop support for the special RPMSG char devices entirely
at some point.
- The WWAN char devices show up automatically, without having to export
them explicitly, making ModemManager work out of the box on these devices.
For now, just support using the WWAN subsystem alternatively for the
qcom-soc plugin. Later we can consider dropping the old RPMSG code.
93 lines
2.9 KiB
C
93 lines
2.9 KiB
C
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details:
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*
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* Copyright (C) 2020 Aleksander Morgado <aleksander@aleksander.es>
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*/
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#include <string.h>
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#include <termios.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <getopt.h>
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#include <time.h>
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#include <gmodule.h>
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#define _LIBMM_INSIDE_MM
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#include <libmm-glib.h>
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#include "mm-plugin-qcom-soc.h"
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#include "mm-broadband-modem-qmi-qcom-soc.h"
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#include "mm-log-object.h"
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G_DEFINE_TYPE (MMPluginQcomSoc, mm_plugin_qcom_soc, MM_TYPE_PLUGIN)
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MM_PLUGIN_DEFINE_MAJOR_VERSION
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MM_PLUGIN_DEFINE_MINOR_VERSION
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/*****************************************************************************/
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static MMBaseModem *
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create_modem (MMPlugin *self,
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const gchar *uid,
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const gchar **drivers,
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guint16 vendor,
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guint16 product,
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GList *probes,
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GError **error)
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{
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if (!mm_port_probe_list_has_qmi_port (probes)) {
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g_set_error (error, MM_CORE_ERROR, MM_CORE_ERROR_FAILED,
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"Unsupported device: at least a QMI port is required");
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return NULL;
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}
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mm_obj_dbg (self, "Qualcomm SoC modem found...");
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return MM_BASE_MODEM (mm_broadband_modem_qmi_qcom_soc_new (uid,
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drivers,
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mm_plugin_get_name (self),
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vendor,
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product));
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}
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/*****************************************************************************/
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G_MODULE_EXPORT MMPlugin *
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mm_plugin_create (void)
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{
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static const gchar *subsystems[] = { "wwan", "rpmsg", "net", "qrtr", NULL };
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return MM_PLUGIN (
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g_object_new (MM_TYPE_PLUGIN_QCOM_SOC,
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MM_PLUGIN_NAME, MM_MODULE_NAME,
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MM_PLUGIN_ALLOWED_SUBSYSTEMS, subsystems,
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MM_PLUGIN_ALLOWED_AT, TRUE,
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MM_PLUGIN_ALLOWED_QMI, TRUE,
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NULL));
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}
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static void
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mm_plugin_qcom_soc_init (MMPluginQcomSoc *self)
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{
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}
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static void
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mm_plugin_qcom_soc_class_init (MMPluginQcomSocClass *klass)
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{
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MMPluginClass *plugin_class = MM_PLUGIN_CLASS (klass);
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plugin_class->create_modem = create_modem;
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}
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