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quectel: Trigger reprobe upon RDY URC

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Apparent self-resets without re-enumeration have been observed on
Quectel modems EC21 and EG91. See #285 and
https://lists.freedesktop.org/archives/modemmanager-devel/2022-September/009407.html

Fixes https://gitlab.freedesktop.org/mobile-broadband/ModemManager/-/issues/285

Signed-off-by: Sven Schwermer <sven.schwermer@disruptive-technologies.com>
This commit is contained in:
Sven Schwermer
2022-09-09 13:24:01 +02:00
committed by Aleksander Morgado
parent 2c66d43bb9
commit fcd393a6c2
1 changed files with 32 additions and 0 deletions
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32
plugins/quectel/mm-shared-quectel.c
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@@ -56,6 +56,7 @@ typedef struct {
FeatureSupport qgps_supported;
GRegex *qgpsurc_regex;
GRegex *qlwurc_regex;
GRegex *rdy_regex;
} Private;
static void
@@ -63,6 +64,7 @@ private_free (Private *priv)
{
g_regex_unref (priv->qgpsurc_regex);
g_regex_unref (priv->qlwurc_regex);
g_regex_unref (priv->rdy_regex);
g_slice_free (Private, priv);
}
@@ -83,6 +85,11 @@ get_private (MMSharedQuectel *self)
priv->qgps_supported = FEATURE_SUPPORT_UNKNOWN;
priv->qgpsurc_regex = g_regex_new ("\\r\\n\\+QGPSURC:.*", G_REGEX_RAW | G_REGEX_OPTIMIZE, 0, NULL);
priv->qlwurc_regex = g_regex_new ("\\r\\n\\+QLWURC:.*", G_REGEX_RAW | G_REGEX_OPTIMIZE, 0, NULL);
priv->rdy_regex = g_regex_new ("\\r\\nRDY", G_REGEX_RAW | G_REGEX_OPTIMIZE, 0, NULL);
g_assert (priv->qgpsurc_regex);
g_assert (priv->qlwurc_regex);
g_assert (priv->rdy_regex);
g_assert (MM_SHARED_QUECTEL_GET_INTERFACE (self)->peek_parent_broadband_modem_class);
priv->broadband_modem_class_parent = MM_SHARED_QUECTEL_GET_INTERFACE (self)->peek_parent_broadband_modem_class (self);
@@ -98,6 +105,23 @@ get_private (MMSharedQuectel *self)
return priv;
}
/*****************************************************************************/
/* RDY unsolicited event handler */
static void
rdy_handler (MMPortSerialAt *port,
GMatchInfo *match_info,
MMBroadbandModem *self)
{
/* The RDY URC indicates a modem reset that may or may not go hand-in-hand
* with USB re-enumeration. For the latter case, we must make sure to
* re-synchronize modem and ModemManager states by re-probing.
*/
mm_obj_warn (self, "modem reset detected, triggering reprobe");
mm_base_modem_set_reprobe (MM_BASE_MODEM (self), TRUE);
mm_base_modem_set_valid (MM_BASE_MODEM (self), FALSE);
}
/*****************************************************************************/
/* Setup ports (Broadband modem class) */
@@ -134,6 +158,14 @@ mm_shared_quectel_setup_ports (MMBroadbandModem *self)
ports[i],
priv->qlwurc_regex,
NULL, NULL, NULL);
/* Handle RDY */
mm_port_serial_at_add_unsolicited_msg_handler (
ports[i],
priv->rdy_regex,
(MMPortSerialAtUnsolicitedMsgFn)rdy_handler,
self,
NULL);
}
}