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huawei: avoid AT^GETPORTMODE in Huawei MU609

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The MU609 modems from Huawei have a bug (confirmed by Huawei) that causes
the modem to reset if AT^GETPORTMODE is issued.

I have provided and example udev rule I use to disable this command as a
patch,  feel free to drop that if its not acceptable.  Since I cannot tell
the modem type from within the udev rules this is less specific than my
previous code based patch,  but much simpler ;-)

I have two modems that share the same USB ID,  however,  neither supports the
^GETPORTMODE command (and one of them crashes when it is issued).  Perhaps
someone with a Huawei that supports ^GETPORTMODE can check their USB ID's
and see if they clash.

Here is a comment from the Huawei devs:
> We confirmed this is a issue. This is Qualcomm baseband command at Data
> Card. We didn’t delete and block it. We will fix this issue in next FW.
> Thank you very much.

Sign-off-by: David McCullough <david.mccullough@accelecon.com>
This commit is contained in:
David McCullough
2014-06-30 17:10:01 +10:00
committed by Aleksander Morgado
parent 8f837b830d
commit 83c8db8819
2 changed files with 6 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
plugins/huawei/77-mm-huawei-net-port-types.rules
View File

@@ -3,6 +3,9 @@ ACTION!="add|change|move", GOTO="mm_huawei_port_types_end"
ENV{ID_VENDOR_ID}!="12d1", GOTO="mm_huawei_port_types_end"
# MU609 does not support getportmode (crashes modem with default firmware)
ATTRS{idProduct}=="1573", ENV{ID_MM_HUAWEI_DISABLE_GETPORTMODE}="1"
# Mark the modem and at port flags for ModemManager
SUBSYSTEMS=="usb", ATTRS{bInterfaceClass}=="ff", ATTRS{bInterfaceSubClass}=="01", ATTRS{bInterfaceProtocol}=="01", ENV{ID_MM_HUAWEI_MODEM_PORT}="1"
SUBSYSTEMS=="usb", ATTRS{bInterfaceClass}=="ff", ATTRS{bInterfaceSubClass}=="01", ATTRS{bInterfaceProtocol}=="02", ENV{ID_MM_HUAWEI_AT_PORT}="1"

4
plugins/huawei/mm-plugin-huawei.c
View File

@@ -250,6 +250,7 @@ static void
huawei_custom_init_step (HuaweiCustomInitContext *ctx)
{
FirstInterfaceContext *fi_ctx;
GUdevDevice *port;
/* If cancelled, end */
if (g_cancellable_is_cancelled (ctx->cancellable)) {
@@ -286,7 +287,8 @@ huawei_custom_init_step (HuaweiCustomInitContext *ctx)
}
/* Try to get a port map from the modem */
if (!ctx->getportmode_done) {
port = mm_port_probe_peek_port (ctx->probe);
if (!ctx->getportmode_done && !g_udev_device_get_property_as_boolean (port, "ID_MM_HUAWEI_DISABLE_GETPORTMODE")) {
if (ctx->getportmode_retries == 0) {
g_simple_async_result_set_op_res_gboolean (ctx->result, TRUE);
huawei_custom_init_context_complete_and_free (ctx);