| Message ID | 20180525130020.28847-1-bjorn@mork.no (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
From: Bjørn Mork <bjorn@mork.no> Date: Fri, 25 May 2018 15:00:20 +0200 > SIMCOM are reusing a single device ID for many (all of their?) > different modems, based on different chipsets and firmwares. Newer > Qualcomm chipset generations require setting DTR to wake the QMI > function. The SIM7600E modem is using such a chipset, making it > fail to work with this driver despite the device ID match. > > Fix by unconditionally enabling the SET_DTR quirk for all SIMCOM > modems using this specific device ID. This is similar to what > we already have done for another case of device IDs recycled over > multiple chipset generations: 14cf4a771b30 ("drivers: net: usb: > qmi_wwan: add QMI_QUIRK_SET_DTR for Telit PID 0x1201") > > Initial testing on an older SIM7100 modem shows no immediate side > effects. > > Reported-by: Sebastian Sjoholm <sebastian.sjoholm@gmail.com> > Cc: Reinhard Speyerer <rspmn@arcor.de> > Signed-off-by: Bjørn Mork <bjorn@mork.no> Applied. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/net/usb/qmi_wwan.c b/drivers/net/usb/qmi_wwan.c index 42565dd33aa6..148e78f8b48c 100644 --- a/drivers/net/usb/qmi_wwan.c +++ b/drivers/net/usb/qmi_wwan.c @@ -1248,7 +1248,7 @@ static const struct usb_device_id products[] = { {QMI_FIXED_INTF(0x03f0, 0x4e1d, 8)}, /* HP lt4111 LTE/EV-DO/HSPA+ Gobi 4G Module */ {QMI_FIXED_INTF(0x03f0, 0x9d1d, 1)}, /* HP lt4120 Snapdragon X5 LTE */ {QMI_FIXED_INTF(0x22de, 0x9061, 3)}, /* WeTelecom WPD-600N */ - {QMI_FIXED_INTF(0x1e0e, 0x9001, 5)}, /* SIMCom 7230E */ + {QMI_QUIRK_SET_DTR(0x1e0e, 0x9001, 5)}, /* SIMCom 7100E, 7230E, 7600E ++ */ {QMI_QUIRK_SET_DTR(0x2c7c, 0x0125, 4)}, /* Quectel EC25, EC20 R2.0 Mini PCIe */ {QMI_QUIRK_SET_DTR(0x2c7c, 0x0121, 4)}, /* Quectel EC21 Mini PCIe */ {QMI_FIXED_INTF(0x2c7c, 0x0296, 4)}, /* Quectel BG96 */
SIMCOM are reusing a single device ID for many (all of their?) different modems, based on different chipsets and firmwares. Newer Qualcomm chipset generations require setting DTR to wake the QMI function. The SIM7600E modem is using such a chipset, making it fail to work with this driver despite the device ID match. Fix by unconditionally enabling the SET_DTR quirk for all SIMCOM modems using this specific device ID. This is similar to what we already have done for another case of device IDs recycled over multiple chipset generations: 14cf4a771b30 ("drivers: net: usb: qmi_wwan: add QMI_QUIRK_SET_DTR for Telit PID 0x1201") Initial testing on an older SIM7100 modem shows no immediate side effects. Reported-by: Sebastian Sjoholm <sebastian.sjoholm@gmail.com> Cc: Reinhard Speyerer <rspmn@arcor.de> Signed-off-by: Bjørn Mork <bjorn@mork.no> --- I propose this for net-next for now to get some extra testing exposure before going into stable. I'll send a separate request for stable backport as soon as I'm satisfied that there are no hidden issues with some specific modem. Bjørn drivers/net/usb/qmi_wwan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)