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broadband-modem: detect modem modes with +CEREG and +C5GREG

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Some AT-based modems like the Quectel Unisoc-based RM500U don't
support the older AT commands we used to detect modes like
AT*CNTI=2 and AT+WS46. Add support for detecting 4G and 5G
with generic commands too.

Fixes: https://gitlab.freedesktop.org/mobile-broadband/ModemManager/-/issues/786

Signed-off-by: Dan Williams <dan@ioncontrol.co>
This commit is contained in:
Dan Williams
2025-03-27 23:51:17 +00:00
parent 8d2a91c920
commit bad4765581
1 changed files with 62 additions and 0 deletions
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src/mm-broadband-modem.c
+62
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@@ -1730,6 +1730,8 @@ typedef struct {
gboolean run_cnti;
gboolean run_ws46;
gboolean run_gcap;
gboolean run_cereg;
gboolean run_c5greg;
} LoadSupportedModesContext;
static GArray *
@@ -1759,6 +1761,42 @@ modem_load_supported_modes_finish (MMIfaceModem *self,
static void load_supported_modes_step (GTask *task);
static void
supported_modes_c5greg_ready (MMBaseModem *_self,
GAsyncResult *res,
GTask *task)
{
LoadSupportedModesContext *ctx;
g_autoptr(GError) error = NULL;
ctx = g_task_get_task_data (task);
mm_base_modem_at_command_finish (_self, res, &error);
if (!error)
ctx->mode |= MM_MODEM_MODE_5G;
ctx->run_c5greg = FALSE;
load_supported_modes_step (task);
}
static void
supported_modes_cereg_ready (MMBaseModem *_self,
GAsyncResult *res,
GTask *task)
{
LoadSupportedModesContext *ctx;
g_autoptr(GError) error = NULL;
ctx = g_task_get_task_data (task);
mm_base_modem_at_command_finish (_self, res, &error);
if (!error)
ctx->mode |= MM_MODEM_MODE_4G;
ctx->run_cereg = FALSE;
load_supported_modes_step (task);
}
static void
supported_modes_gcap_ready (MMBaseModem *_self,
GAsyncResult *res,
@@ -1974,6 +2012,28 @@ load_supported_modes_step (GTask *task)
return;
}
if (ctx->run_cereg) {
mm_base_modem_at_command (
MM_BASE_MODEM (self),
"+CEREG=?",
3,
TRUE, /* allow caching */
(GAsyncReadyCallback)supported_modes_cereg_ready,
task);
return;
}
if (ctx->run_c5greg) {
mm_base_modem_at_command (
MM_BASE_MODEM (self),
"+C5GREG=?",
3,
TRUE, /* allow caching */
(GAsyncReadyCallback)supported_modes_c5greg_ready,
task);
return;
}
/* All done.
* If no mode found, error */
if (ctx->mode == MM_MODEM_MODE_NONE)
@@ -2003,6 +2063,8 @@ modem_load_supported_modes (MMIfaceModem *self,
/* Run +WS46=? and *CNTI=2 */
ctx->run_ws46 = TRUE;
ctx->run_cnti = TRUE;
ctx->run_cereg = TRUE;
ctx->run_c5greg = TRUE;
}
if (mm_iface_modem_is_cdma (self)) {