[OpenWrt-Devel] [PATCH] kernel/generic: 3.18, 4.y: Add support for Quectel EC20 Mini PCIe module
Petr Štetiar
ynezz at true.cz
Wed Nov 11 08:18:33 EST 2015
* both patches (qcserial/qmi_wwan) were submitted upstream[1,2]
* build tested on 3.18 and 4.1
* run tested on imx6 platform with 4.1
1. http://article.gmane.org/gmane.linux.usb.general/132998
2. http://article.gmane.org/gmane.linux.usb.general/133113
Signed-off-by: Petr Štetiar <ynezz at true.cz>
---
...l-Add-support-for-Quectel-EC20-Mini-PCIe-.patch | 119 ++++++++++++++++++++
...n-Add-quirk-for-Quectel-EC20-Mini-PCIe-mo.patch | 101 +++++++++++++++++
...l-Add-support-for-Quectel-EC20-Mini-PCIe-.patch | 119 ++++++++++++++++++++
...n-Add-quirk-for-Quectel-EC20-Mini-PCIe-mo.patch | 101 +++++++++++++++++
...l-Add-support-for-Quectel-EC20-Mini-PCIe-.patch | 119 ++++++++++++++++++++
...n-Add-quirk-for-Quectel-EC20-Mini-PCIe-mo.patch | 101 +++++++++++++++++
...l-Add-support-for-Quectel-EC20-Mini-PCIe-.patch | 119 ++++++++++++++++++++
...n-Add-quirk-for-Quectel-EC20-Mini-PCIe-mo.patch | 101 +++++++++++++++++
8 files changed, 880 insertions(+)
create mode 100644 target/linux/generic/patches-3.18/192-USB-qcserial-Add-support-for-Quectel-EC20-Mini-PCIe-.patch
create mode 100644 target/linux/generic/patches-3.18/193-USB-qmi_wwan-Add-quirk-for-Quectel-EC20-Mini-PCIe-mo.patch
create mode 100644 target/linux/generic/patches-4.0/192-USB-qcserial-Add-support-for-Quectel-EC20-Mini-PCIe-.patch
create mode 100644 target/linux/generic/patches-4.0/193-USB-qmi_wwan-Add-quirk-for-Quectel-EC20-Mini-PCIe-mo.patch
create mode 100644 target/linux/generic/patches-4.1/192-USB-qcserial-Add-support-for-Quectel-EC20-Mini-PCIe-.patch
create mode 100644 target/linux/generic/patches-4.1/193-USB-qmi_wwan-Add-quirk-for-Quectel-EC20-Mini-PCIe-mo.patch
create mode 100644 target/linux/generic/patches-4.3/192-USB-qcserial-Add-support-for-Quectel-EC20-Mini-PCIe-.patch
create mode 100644 target/linux/generic/patches-4.3/193-USB-qmi_wwan-Add-quirk-for-Quectel-EC20-Mini-PCIe-mo.patch
diff --git a/target/linux/generic/patches-3.18/192-USB-qcserial-Add-support-for-Quectel-EC20-Mini-PCIe-.patch b/target/linux/generic/patches-3.18/192-USB-qcserial-Add-support-for-Quectel-EC20-Mini-PCIe-.patch
new file mode 100644
index 0000000..f56941c
--- /dev/null
+++ b/target/linux/generic/patches-3.18/192-USB-qcserial-Add-support-for-Quectel-EC20-Mini-PCIe-.patch
@@ -0,0 +1,119 @@
+From 128524b9db3e4f4245226852bee771bd03db75be Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Petr=20=C5=A0tetiar?= <ynezz at true.cz>
+Date: Tue, 3 Nov 2015 11:01:42 +0100
+Subject: [PATCH 1/2] USB: qcserial: Add support for Quectel EC20 Mini PCIe
+ module
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+It seems like this device has same vendor and product IDs as G2K
+devices, but it has different number of interfaces(4 vs 5) and also
+different interface layout which makes it currently unusable:
+
+ usbcore: registered new interface driver qcserial
+ usbserial: USB Serial support registered for Qualcomm USB modem
+ usb 2-1.2: unknown number of interfaces: 5
+
+lsusb output:
+
+ Bus 002 Device 003: ID 05c6:9215 Qualcomm, Inc. Acer Gobi 2000 Wireless
+ Device Descriptor:
+ bLength 18
+ bDescriptorType 1
+ bcdUSB 2.00
+ bDeviceClass 0 (Defined at Interface level)
+ bDeviceSubClass 0
+ bDeviceProtocol 0
+ bMaxPacketSize0 64
+ idVendor 0x05c6 Qualcomm, Inc.
+ idProduct 0x9215 Acer Gobi 2000 Wireless Modem
+ bcdDevice 2.32
+ iManufacturer 1 Quectel
+ iProduct 2 Quectel LTE Module
+ iSerial 0
+ bNumConfigurations 1
+ Configuration Descriptor:
+ bLength 9
+ bDescriptorType 2
+ wTotalLength 209
+ bNumInterfaces 5
+ bConfigurationValue 1
+ iConfiguration 0
+ bmAttributes 0xa0
+ (Bus Powered)
+ Remote Wakeup
+ MaxPower 500mA
+
+Signed-off-by: Petr Štetiar <ynezz at true.cz>
+---
+ drivers/usb/serial/qcserial.c | 39 +++++++++++++++++++++++++++++++++++++++
+ 1 file changed, 39 insertions(+)
+
+diff --git a/drivers/usb/serial/qcserial.c b/drivers/usb/serial/qcserial.c
+index ebcec8c..d462132 100644
+--- a/drivers/usb/serial/qcserial.c
++++ b/drivers/usb/serial/qcserial.c
+@@ -22,6 +22,8 @@
+ #define DRIVER_AUTHOR "Qualcomm Inc"
+ #define DRIVER_DESC "Qualcomm USB Serial driver"
+
++#define QUECTEL_EC20_IDPRODUCT 0x9215
++
+ /* standard device layouts supported by this driver */
+ enum qcserial_layouts {
+ QCSERIAL_G2K = 0, /* Gobi 2000 */
+@@ -167,6 +169,38 @@ static const struct usb_device_id id_table[] = {
+ };
+ MODULE_DEVICE_TABLE(usb, id_table);
+
++static int handle_quectel_ec20(struct device *dev, int ifnum)
++{
++ int altsetting = 0;
++
++ /*
++ * Quectel EC20 Mini PCIe LTE module layout:
++ * 0: DM/DIAG (use libqcdm from ModemManager for communication)
++ * 1: NMEA
++ * 2: AT-capable modem port
++ * 3: Modem interface
++ * 4: NDIS
++ */
++ switch (ifnum) {
++ case 0:
++ dev_dbg(dev, "Quectel EC20 DM/DIAG interface found\n");
++ break;
++ case 1:
++ dev_dbg(dev, "Quectel EC20 NMEA GPS interface found\n");
++ break;
++ case 2:
++ case 3:
++ dev_dbg(dev, "Quectel EC20 Modem port found\n");
++ break;
++ case 4:
++ /* Don't claim the QMI/net interface */
++ altsetting = -1;
++ break;
++ }
++
++ return altsetting;
++}
++
+ static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id)
+ {
+ struct usb_host_interface *intf = serial->interface->cur_altsetting;
+@@ -235,6 +269,11 @@ static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id)
+ altsetting = -1;
+ break;
+ case QCSERIAL_G2K:
++ if (nintf == 5 && id->idProduct == QUECTEL_EC20_IDPRODUCT) {
++ altsetting = handle_quectel_ec20(dev, ifnum);
++ goto done;
++ }
++
+ /*
+ * Gobi 2K+ USB layout:
+ * 0: QMI/net
+--
+1.7.9.5
+
diff --git a/target/linux/generic/patches-3.18/193-USB-qmi_wwan-Add-quirk-for-Quectel-EC20-Mini-PCIe-mo.patch b/target/linux/generic/patches-3.18/193-USB-qmi_wwan-Add-quirk-for-Quectel-EC20-Mini-PCIe-mo.patch
new file mode 100644
index 0000000..3b08571
--- /dev/null
+++ b/target/linux/generic/patches-3.18/193-USB-qmi_wwan-Add-quirk-for-Quectel-EC20-Mini-PCIe-mo.patch
@@ -0,0 +1,101 @@
+From fe29727caa7fe434fcb3166df2a62672bc516b54 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Petr=20=C5=A0tetiar?= <ynezz at true.cz>
+Date: Wed, 4 Nov 2015 16:23:37 +0100
+Subject: [PATCH 2/2] USB: qmi_wwan: Add quirk for Quectel EC20 Mini PCIe
+ module
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+This device has same vendor and product IDs as G2K devices, but it has
+different number of interfaces(4 vs 5) and also different interface
+layout where EC20 has QMI on interface 4 instead of 0.
+
+lsusb output:
+
+ Bus 002 Device 003: ID 05c6:9215 Qualcomm, Inc. Acer Gobi 2000
+ Device Descriptor:
+ bLength 18
+ bDescriptorType 1
+ bcdUSB 2.00
+ bDeviceClass 0 (Defined at Interface level)
+ bDeviceSubClass 0
+ bDeviceProtocol 0
+ bMaxPacketSize0 64
+ idVendor 0x05c6 Qualcomm, Inc.
+ idProduct 0x9215 Acer Gobi 2000 Wireless Modem
+ bcdDevice 2.32
+ iManufacturer 1 Quectel
+ iProduct 2 Quectel LTE Module
+ iSerial 0
+ bNumConfigurations 1
+ Configuration Descriptor:
+ bLength 9
+ bDescriptorType 2
+ wTotalLength 209
+ bNumInterfaces 5
+ bConfigurationValue 1
+ iConfiguration 0
+ bmAttributes 0xa0
+ (Bus Powered)
+ Remote Wakeup
+ MaxPower 500mA
+
+Signed-off-by: Petr Štetiar <ynezz at true.cz>
+---
+ drivers/net/usb/qmi_wwan.c | 21 +++++++++++++++++++++
+ 1 file changed, 21 insertions(+)
+
+diff --git a/drivers/net/usb/qmi_wwan.c b/drivers/net/usb/qmi_wwan.c
+index 2a7c1be..b81a32c 100644
+--- a/drivers/net/usb/qmi_wwan.c
++++ b/drivers/net/usb/qmi_wwan.c
+@@ -822,6 +822,7 @@ static const struct usb_device_id products[] = {
+ {QMI_GOBI_DEVICE(0x05c6, 0x9245)}, /* Samsung Gobi 2000 Modem device (VL176) */
+ {QMI_GOBI_DEVICE(0x03f0, 0x251d)}, /* HP Gobi 2000 Modem device (VP412) */
+ {QMI_GOBI_DEVICE(0x05c6, 0x9215)}, /* Acer Gobi 2000 Modem device (VP413) */
++ {QMI_FIXED_INTF(0x05c6, 0x9215, 4)}, /* Quectel EC20 Mini PCIe */
+ {QMI_GOBI_DEVICE(0x05c6, 0x9265)}, /* Asus Gobi 2000 Modem device (VR305) */
+ {QMI_GOBI_DEVICE(0x05c6, 0x9235)}, /* Top Global Gobi 2000 Modem device (VR306) */
+ {QMI_GOBI_DEVICE(0x05c6, 0x9275)}, /* iRex Technologies Gobi 2000 Modem device (VR307) */
+@@ -853,10 +854,24 @@ static const struct usb_device_id products[] = {
+ };
+ MODULE_DEVICE_TABLE(usb, products);
+
++static bool quectel_ec20_detected(struct usb_interface *intf)
++{
++ struct usb_device *dev = interface_to_usbdev(intf);
++
++ if (dev->actconfig &&
++ le16_to_cpu(dev->descriptor.idVendor) == 0x05c6 &&
++ le16_to_cpu(dev->descriptor.idProduct) == 0x9215 &&
++ dev->actconfig->desc.bNumInterfaces == 5)
++ return true;
++
++ return false;
++}
++
+ static int qmi_wwan_probe(struct usb_interface *intf,
+ const struct usb_device_id *prod)
+ {
+ struct usb_device_id *id = (struct usb_device_id *)prod;
++ struct usb_interface_descriptor *desc = &intf->cur_altsetting->desc;
+
+ /* Workaround to enable dynamic IDs. This disables usbnet
+ * blacklisting functionality. Which, if required, can be
+@@ -868,6 +883,12 @@ static int qmi_wwan_probe(struct usb_interface *intf,
+ id->driver_info = (unsigned long)&qmi_wwan_info;
+ }
+
++ /* Quectel EC20 quirk where we've QMI on interface 4 instead of 0 */
++ if (quectel_ec20_detected(intf) && desc->bInterfaceNumber == 0) {
++ dev_dbg(&intf->dev, "Quectel EC20 quirk, skipping interface 0\n");
++ return -ENODEV;
++ }
++
+ return usbnet_probe(intf, id);
+ }
+
+--
+1.7.9.5
+
diff --git a/target/linux/generic/patches-4.0/192-USB-qcserial-Add-support-for-Quectel-EC20-Mini-PCIe-.patch b/target/linux/generic/patches-4.0/192-USB-qcserial-Add-support-for-Quectel-EC20-Mini-PCIe-.patch
new file mode 100644
index 0000000..f56941c
--- /dev/null
+++ b/target/linux/generic/patches-4.0/192-USB-qcserial-Add-support-for-Quectel-EC20-Mini-PCIe-.patch
@@ -0,0 +1,119 @@
+From 128524b9db3e4f4245226852bee771bd03db75be Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Petr=20=C5=A0tetiar?= <ynezz at true.cz>
+Date: Tue, 3 Nov 2015 11:01:42 +0100
+Subject: [PATCH 1/2] USB: qcserial: Add support for Quectel EC20 Mini PCIe
+ module
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+It seems like this device has same vendor and product IDs as G2K
+devices, but it has different number of interfaces(4 vs 5) and also
+different interface layout which makes it currently unusable:
+
+ usbcore: registered new interface driver qcserial
+ usbserial: USB Serial support registered for Qualcomm USB modem
+ usb 2-1.2: unknown number of interfaces: 5
+
+lsusb output:
+
+ Bus 002 Device 003: ID 05c6:9215 Qualcomm, Inc. Acer Gobi 2000 Wireless
+ Device Descriptor:
+ bLength 18
+ bDescriptorType 1
+ bcdUSB 2.00
+ bDeviceClass 0 (Defined at Interface level)
+ bDeviceSubClass 0
+ bDeviceProtocol 0
+ bMaxPacketSize0 64
+ idVendor 0x05c6 Qualcomm, Inc.
+ idProduct 0x9215 Acer Gobi 2000 Wireless Modem
+ bcdDevice 2.32
+ iManufacturer 1 Quectel
+ iProduct 2 Quectel LTE Module
+ iSerial 0
+ bNumConfigurations 1
+ Configuration Descriptor:
+ bLength 9
+ bDescriptorType 2
+ wTotalLength 209
+ bNumInterfaces 5
+ bConfigurationValue 1
+ iConfiguration 0
+ bmAttributes 0xa0
+ (Bus Powered)
+ Remote Wakeup
+ MaxPower 500mA
+
+Signed-off-by: Petr Štetiar <ynezz at true.cz>
+---
+ drivers/usb/serial/qcserial.c | 39 +++++++++++++++++++++++++++++++++++++++
+ 1 file changed, 39 insertions(+)
+
+diff --git a/drivers/usb/serial/qcserial.c b/drivers/usb/serial/qcserial.c
+index ebcec8c..d462132 100644
+--- a/drivers/usb/serial/qcserial.c
++++ b/drivers/usb/serial/qcserial.c
+@@ -22,6 +22,8 @@
+ #define DRIVER_AUTHOR "Qualcomm Inc"
+ #define DRIVER_DESC "Qualcomm USB Serial driver"
+
++#define QUECTEL_EC20_IDPRODUCT 0x9215
++
+ /* standard device layouts supported by this driver */
+ enum qcserial_layouts {
+ QCSERIAL_G2K = 0, /* Gobi 2000 */
+@@ -167,6 +169,38 @@ static const struct usb_device_id id_table[] = {
+ };
+ MODULE_DEVICE_TABLE(usb, id_table);
+
++static int handle_quectel_ec20(struct device *dev, int ifnum)
++{
++ int altsetting = 0;
++
++ /*
++ * Quectel EC20 Mini PCIe LTE module layout:
++ * 0: DM/DIAG (use libqcdm from ModemManager for communication)
++ * 1: NMEA
++ * 2: AT-capable modem port
++ * 3: Modem interface
++ * 4: NDIS
++ */
++ switch (ifnum) {
++ case 0:
++ dev_dbg(dev, "Quectel EC20 DM/DIAG interface found\n");
++ break;
++ case 1:
++ dev_dbg(dev, "Quectel EC20 NMEA GPS interface found\n");
++ break;
++ case 2:
++ case 3:
++ dev_dbg(dev, "Quectel EC20 Modem port found\n");
++ break;
++ case 4:
++ /* Don't claim the QMI/net interface */
++ altsetting = -1;
++ break;
++ }
++
++ return altsetting;
++}
++
+ static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id)
+ {
+ struct usb_host_interface *intf = serial->interface->cur_altsetting;
+@@ -235,6 +269,11 @@ static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id)
+ altsetting = -1;
+ break;
+ case QCSERIAL_G2K:
++ if (nintf == 5 && id->idProduct == QUECTEL_EC20_IDPRODUCT) {
++ altsetting = handle_quectel_ec20(dev, ifnum);
++ goto done;
++ }
++
+ /*
+ * Gobi 2K+ USB layout:
+ * 0: QMI/net
+--
+1.7.9.5
+
diff --git a/target/linux/generic/patches-4.0/193-USB-qmi_wwan-Add-quirk-for-Quectel-EC20-Mini-PCIe-mo.patch b/target/linux/generic/patches-4.0/193-USB-qmi_wwan-Add-quirk-for-Quectel-EC20-Mini-PCIe-mo.patch
new file mode 100644
index 0000000..3b08571
--- /dev/null
+++ b/target/linux/generic/patches-4.0/193-USB-qmi_wwan-Add-quirk-for-Quectel-EC20-Mini-PCIe-mo.patch
@@ -0,0 +1,101 @@
+From fe29727caa7fe434fcb3166df2a62672bc516b54 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Petr=20=C5=A0tetiar?= <ynezz at true.cz>
+Date: Wed, 4 Nov 2015 16:23:37 +0100
+Subject: [PATCH 2/2] USB: qmi_wwan: Add quirk for Quectel EC20 Mini PCIe
+ module
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+This device has same vendor and product IDs as G2K devices, but it has
+different number of interfaces(4 vs 5) and also different interface
+layout where EC20 has QMI on interface 4 instead of 0.
+
+lsusb output:
+
+ Bus 002 Device 003: ID 05c6:9215 Qualcomm, Inc. Acer Gobi 2000
+ Device Descriptor:
+ bLength 18
+ bDescriptorType 1
+ bcdUSB 2.00
+ bDeviceClass 0 (Defined at Interface level)
+ bDeviceSubClass 0
+ bDeviceProtocol 0
+ bMaxPacketSize0 64
+ idVendor 0x05c6 Qualcomm, Inc.
+ idProduct 0x9215 Acer Gobi 2000 Wireless Modem
+ bcdDevice 2.32
+ iManufacturer 1 Quectel
+ iProduct 2 Quectel LTE Module
+ iSerial 0
+ bNumConfigurations 1
+ Configuration Descriptor:
+ bLength 9
+ bDescriptorType 2
+ wTotalLength 209
+ bNumInterfaces 5
+ bConfigurationValue 1
+ iConfiguration 0
+ bmAttributes 0xa0
+ (Bus Powered)
+ Remote Wakeup
+ MaxPower 500mA
+
+Signed-off-by: Petr Štetiar <ynezz at true.cz>
+---
+ drivers/net/usb/qmi_wwan.c | 21 +++++++++++++++++++++
+ 1 file changed, 21 insertions(+)
+
+diff --git a/drivers/net/usb/qmi_wwan.c b/drivers/net/usb/qmi_wwan.c
+index 2a7c1be..b81a32c 100644
+--- a/drivers/net/usb/qmi_wwan.c
++++ b/drivers/net/usb/qmi_wwan.c
+@@ -822,6 +822,7 @@ static const struct usb_device_id products[] = {
+ {QMI_GOBI_DEVICE(0x05c6, 0x9245)}, /* Samsung Gobi 2000 Modem device (VL176) */
+ {QMI_GOBI_DEVICE(0x03f0, 0x251d)}, /* HP Gobi 2000 Modem device (VP412) */
+ {QMI_GOBI_DEVICE(0x05c6, 0x9215)}, /* Acer Gobi 2000 Modem device (VP413) */
++ {QMI_FIXED_INTF(0x05c6, 0x9215, 4)}, /* Quectel EC20 Mini PCIe */
+ {QMI_GOBI_DEVICE(0x05c6, 0x9265)}, /* Asus Gobi 2000 Modem device (VR305) */
+ {QMI_GOBI_DEVICE(0x05c6, 0x9235)}, /* Top Global Gobi 2000 Modem device (VR306) */
+ {QMI_GOBI_DEVICE(0x05c6, 0x9275)}, /* iRex Technologies Gobi 2000 Modem device (VR307) */
+@@ -853,10 +854,24 @@ static const struct usb_device_id products[] = {
+ };
+ MODULE_DEVICE_TABLE(usb, products);
+
++static bool quectel_ec20_detected(struct usb_interface *intf)
++{
++ struct usb_device *dev = interface_to_usbdev(intf);
++
++ if (dev->actconfig &&
++ le16_to_cpu(dev->descriptor.idVendor) == 0x05c6 &&
++ le16_to_cpu(dev->descriptor.idProduct) == 0x9215 &&
++ dev->actconfig->desc.bNumInterfaces == 5)
++ return true;
++
++ return false;
++}
++
+ static int qmi_wwan_probe(struct usb_interface *intf,
+ const struct usb_device_id *prod)
+ {
+ struct usb_device_id *id = (struct usb_device_id *)prod;
++ struct usb_interface_descriptor *desc = &intf->cur_altsetting->desc;
+
+ /* Workaround to enable dynamic IDs. This disables usbnet
+ * blacklisting functionality. Which, if required, can be
+@@ -868,6 +883,12 @@ static int qmi_wwan_probe(struct usb_interface *intf,
+ id->driver_info = (unsigned long)&qmi_wwan_info;
+ }
+
++ /* Quectel EC20 quirk where we've QMI on interface 4 instead of 0 */
++ if (quectel_ec20_detected(intf) && desc->bInterfaceNumber == 0) {
++ dev_dbg(&intf->dev, "Quectel EC20 quirk, skipping interface 0\n");
++ return -ENODEV;
++ }
++
+ return usbnet_probe(intf, id);
+ }
+
+--
+1.7.9.5
+
diff --git a/target/linux/generic/patches-4.1/192-USB-qcserial-Add-support-for-Quectel-EC20-Mini-PCIe-.patch b/target/linux/generic/patches-4.1/192-USB-qcserial-Add-support-for-Quectel-EC20-Mini-PCIe-.patch
new file mode 100644
index 0000000..f56941c
--- /dev/null
+++ b/target/linux/generic/patches-4.1/192-USB-qcserial-Add-support-for-Quectel-EC20-Mini-PCIe-.patch
@@ -0,0 +1,119 @@
+From 128524b9db3e4f4245226852bee771bd03db75be Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Petr=20=C5=A0tetiar?= <ynezz at true.cz>
+Date: Tue, 3 Nov 2015 11:01:42 +0100
+Subject: [PATCH 1/2] USB: qcserial: Add support for Quectel EC20 Mini PCIe
+ module
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+It seems like this device has same vendor and product IDs as G2K
+devices, but it has different number of interfaces(4 vs 5) and also
+different interface layout which makes it currently unusable:
+
+ usbcore: registered new interface driver qcserial
+ usbserial: USB Serial support registered for Qualcomm USB modem
+ usb 2-1.2: unknown number of interfaces: 5
+
+lsusb output:
+
+ Bus 002 Device 003: ID 05c6:9215 Qualcomm, Inc. Acer Gobi 2000 Wireless
+ Device Descriptor:
+ bLength 18
+ bDescriptorType 1
+ bcdUSB 2.00
+ bDeviceClass 0 (Defined at Interface level)
+ bDeviceSubClass 0
+ bDeviceProtocol 0
+ bMaxPacketSize0 64
+ idVendor 0x05c6 Qualcomm, Inc.
+ idProduct 0x9215 Acer Gobi 2000 Wireless Modem
+ bcdDevice 2.32
+ iManufacturer 1 Quectel
+ iProduct 2 Quectel LTE Module
+ iSerial 0
+ bNumConfigurations 1
+ Configuration Descriptor:
+ bLength 9
+ bDescriptorType 2
+ wTotalLength 209
+ bNumInterfaces 5
+ bConfigurationValue 1
+ iConfiguration 0
+ bmAttributes 0xa0
+ (Bus Powered)
+ Remote Wakeup
+ MaxPower 500mA
+
+Signed-off-by: Petr Štetiar <ynezz at true.cz>
+---
+ drivers/usb/serial/qcserial.c | 39 +++++++++++++++++++++++++++++++++++++++
+ 1 file changed, 39 insertions(+)
+
+diff --git a/drivers/usb/serial/qcserial.c b/drivers/usb/serial/qcserial.c
+index ebcec8c..d462132 100644
+--- a/drivers/usb/serial/qcserial.c
++++ b/drivers/usb/serial/qcserial.c
+@@ -22,6 +22,8 @@
+ #define DRIVER_AUTHOR "Qualcomm Inc"
+ #define DRIVER_DESC "Qualcomm USB Serial driver"
+
++#define QUECTEL_EC20_IDPRODUCT 0x9215
++
+ /* standard device layouts supported by this driver */
+ enum qcserial_layouts {
+ QCSERIAL_G2K = 0, /* Gobi 2000 */
+@@ -167,6 +169,38 @@ static const struct usb_device_id id_table[] = {
+ };
+ MODULE_DEVICE_TABLE(usb, id_table);
+
++static int handle_quectel_ec20(struct device *dev, int ifnum)
++{
++ int altsetting = 0;
++
++ /*
++ * Quectel EC20 Mini PCIe LTE module layout:
++ * 0: DM/DIAG (use libqcdm from ModemManager for communication)
++ * 1: NMEA
++ * 2: AT-capable modem port
++ * 3: Modem interface
++ * 4: NDIS
++ */
++ switch (ifnum) {
++ case 0:
++ dev_dbg(dev, "Quectel EC20 DM/DIAG interface found\n");
++ break;
++ case 1:
++ dev_dbg(dev, "Quectel EC20 NMEA GPS interface found\n");
++ break;
++ case 2:
++ case 3:
++ dev_dbg(dev, "Quectel EC20 Modem port found\n");
++ break;
++ case 4:
++ /* Don't claim the QMI/net interface */
++ altsetting = -1;
++ break;
++ }
++
++ return altsetting;
++}
++
+ static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id)
+ {
+ struct usb_host_interface *intf = serial->interface->cur_altsetting;
+@@ -235,6 +269,11 @@ static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id)
+ altsetting = -1;
+ break;
+ case QCSERIAL_G2K:
++ if (nintf == 5 && id->idProduct == QUECTEL_EC20_IDPRODUCT) {
++ altsetting = handle_quectel_ec20(dev, ifnum);
++ goto done;
++ }
++
+ /*
+ * Gobi 2K+ USB layout:
+ * 0: QMI/net
+--
+1.7.9.5
+
diff --git a/target/linux/generic/patches-4.1/193-USB-qmi_wwan-Add-quirk-for-Quectel-EC20-Mini-PCIe-mo.patch b/target/linux/generic/patches-4.1/193-USB-qmi_wwan-Add-quirk-for-Quectel-EC20-Mini-PCIe-mo.patch
new file mode 100644
index 0000000..3b08571
--- /dev/null
+++ b/target/linux/generic/patches-4.1/193-USB-qmi_wwan-Add-quirk-for-Quectel-EC20-Mini-PCIe-mo.patch
@@ -0,0 +1,101 @@
+From fe29727caa7fe434fcb3166df2a62672bc516b54 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Petr=20=C5=A0tetiar?= <ynezz at true.cz>
+Date: Wed, 4 Nov 2015 16:23:37 +0100
+Subject: [PATCH 2/2] USB: qmi_wwan: Add quirk for Quectel EC20 Mini PCIe
+ module
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+This device has same vendor and product IDs as G2K devices, but it has
+different number of interfaces(4 vs 5) and also different interface
+layout where EC20 has QMI on interface 4 instead of 0.
+
+lsusb output:
+
+ Bus 002 Device 003: ID 05c6:9215 Qualcomm, Inc. Acer Gobi 2000
+ Device Descriptor:
+ bLength 18
+ bDescriptorType 1
+ bcdUSB 2.00
+ bDeviceClass 0 (Defined at Interface level)
+ bDeviceSubClass 0
+ bDeviceProtocol 0
+ bMaxPacketSize0 64
+ idVendor 0x05c6 Qualcomm, Inc.
+ idProduct 0x9215 Acer Gobi 2000 Wireless Modem
+ bcdDevice 2.32
+ iManufacturer 1 Quectel
+ iProduct 2 Quectel LTE Module
+ iSerial 0
+ bNumConfigurations 1
+ Configuration Descriptor:
+ bLength 9
+ bDescriptorType 2
+ wTotalLength 209
+ bNumInterfaces 5
+ bConfigurationValue 1
+ iConfiguration 0
+ bmAttributes 0xa0
+ (Bus Powered)
+ Remote Wakeup
+ MaxPower 500mA
+
+Signed-off-by: Petr Štetiar <ynezz at true.cz>
+---
+ drivers/net/usb/qmi_wwan.c | 21 +++++++++++++++++++++
+ 1 file changed, 21 insertions(+)
+
+diff --git a/drivers/net/usb/qmi_wwan.c b/drivers/net/usb/qmi_wwan.c
+index 2a7c1be..b81a32c 100644
+--- a/drivers/net/usb/qmi_wwan.c
++++ b/drivers/net/usb/qmi_wwan.c
+@@ -822,6 +822,7 @@ static const struct usb_device_id products[] = {
+ {QMI_GOBI_DEVICE(0x05c6, 0x9245)}, /* Samsung Gobi 2000 Modem device (VL176) */
+ {QMI_GOBI_DEVICE(0x03f0, 0x251d)}, /* HP Gobi 2000 Modem device (VP412) */
+ {QMI_GOBI_DEVICE(0x05c6, 0x9215)}, /* Acer Gobi 2000 Modem device (VP413) */
++ {QMI_FIXED_INTF(0x05c6, 0x9215, 4)}, /* Quectel EC20 Mini PCIe */
+ {QMI_GOBI_DEVICE(0x05c6, 0x9265)}, /* Asus Gobi 2000 Modem device (VR305) */
+ {QMI_GOBI_DEVICE(0x05c6, 0x9235)}, /* Top Global Gobi 2000 Modem device (VR306) */
+ {QMI_GOBI_DEVICE(0x05c6, 0x9275)}, /* iRex Technologies Gobi 2000 Modem device (VR307) */
+@@ -853,10 +854,24 @@ static const struct usb_device_id products[] = {
+ };
+ MODULE_DEVICE_TABLE(usb, products);
+
++static bool quectel_ec20_detected(struct usb_interface *intf)
++{
++ struct usb_device *dev = interface_to_usbdev(intf);
++
++ if (dev->actconfig &&
++ le16_to_cpu(dev->descriptor.idVendor) == 0x05c6 &&
++ le16_to_cpu(dev->descriptor.idProduct) == 0x9215 &&
++ dev->actconfig->desc.bNumInterfaces == 5)
++ return true;
++
++ return false;
++}
++
+ static int qmi_wwan_probe(struct usb_interface *intf,
+ const struct usb_device_id *prod)
+ {
+ struct usb_device_id *id = (struct usb_device_id *)prod;
++ struct usb_interface_descriptor *desc = &intf->cur_altsetting->desc;
+
+ /* Workaround to enable dynamic IDs. This disables usbnet
+ * blacklisting functionality. Which, if required, can be
+@@ -868,6 +883,12 @@ static int qmi_wwan_probe(struct usb_interface *intf,
+ id->driver_info = (unsigned long)&qmi_wwan_info;
+ }
+
++ /* Quectel EC20 quirk where we've QMI on interface 4 instead of 0 */
++ if (quectel_ec20_detected(intf) && desc->bInterfaceNumber == 0) {
++ dev_dbg(&intf->dev, "Quectel EC20 quirk, skipping interface 0\n");
++ return -ENODEV;
++ }
++
+ return usbnet_probe(intf, id);
+ }
+
+--
+1.7.9.5
+
diff --git a/target/linux/generic/patches-4.3/192-USB-qcserial-Add-support-for-Quectel-EC20-Mini-PCIe-.patch b/target/linux/generic/patches-4.3/192-USB-qcserial-Add-support-for-Quectel-EC20-Mini-PCIe-.patch
new file mode 100644
index 0000000..f56941c
--- /dev/null
+++ b/target/linux/generic/patches-4.3/192-USB-qcserial-Add-support-for-Quectel-EC20-Mini-PCIe-.patch
@@ -0,0 +1,119 @@
+From 128524b9db3e4f4245226852bee771bd03db75be Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Petr=20=C5=A0tetiar?= <ynezz at true.cz>
+Date: Tue, 3 Nov 2015 11:01:42 +0100
+Subject: [PATCH 1/2] USB: qcserial: Add support for Quectel EC20 Mini PCIe
+ module
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+It seems like this device has same vendor and product IDs as G2K
+devices, but it has different number of interfaces(4 vs 5) and also
+different interface layout which makes it currently unusable:
+
+ usbcore: registered new interface driver qcserial
+ usbserial: USB Serial support registered for Qualcomm USB modem
+ usb 2-1.2: unknown number of interfaces: 5
+
+lsusb output:
+
+ Bus 002 Device 003: ID 05c6:9215 Qualcomm, Inc. Acer Gobi 2000 Wireless
+ Device Descriptor:
+ bLength 18
+ bDescriptorType 1
+ bcdUSB 2.00
+ bDeviceClass 0 (Defined at Interface level)
+ bDeviceSubClass 0
+ bDeviceProtocol 0
+ bMaxPacketSize0 64
+ idVendor 0x05c6 Qualcomm, Inc.
+ idProduct 0x9215 Acer Gobi 2000 Wireless Modem
+ bcdDevice 2.32
+ iManufacturer 1 Quectel
+ iProduct 2 Quectel LTE Module
+ iSerial 0
+ bNumConfigurations 1
+ Configuration Descriptor:
+ bLength 9
+ bDescriptorType 2
+ wTotalLength 209
+ bNumInterfaces 5
+ bConfigurationValue 1
+ iConfiguration 0
+ bmAttributes 0xa0
+ (Bus Powered)
+ Remote Wakeup
+ MaxPower 500mA
+
+Signed-off-by: Petr Štetiar <ynezz at true.cz>
+---
+ drivers/usb/serial/qcserial.c | 39 +++++++++++++++++++++++++++++++++++++++
+ 1 file changed, 39 insertions(+)
+
+diff --git a/drivers/usb/serial/qcserial.c b/drivers/usb/serial/qcserial.c
+index ebcec8c..d462132 100644
+--- a/drivers/usb/serial/qcserial.c
++++ b/drivers/usb/serial/qcserial.c
+@@ -22,6 +22,8 @@
+ #define DRIVER_AUTHOR "Qualcomm Inc"
+ #define DRIVER_DESC "Qualcomm USB Serial driver"
+
++#define QUECTEL_EC20_IDPRODUCT 0x9215
++
+ /* standard device layouts supported by this driver */
+ enum qcserial_layouts {
+ QCSERIAL_G2K = 0, /* Gobi 2000 */
+@@ -167,6 +169,38 @@ static const struct usb_device_id id_table[] = {
+ };
+ MODULE_DEVICE_TABLE(usb, id_table);
+
++static int handle_quectel_ec20(struct device *dev, int ifnum)
++{
++ int altsetting = 0;
++
++ /*
++ * Quectel EC20 Mini PCIe LTE module layout:
++ * 0: DM/DIAG (use libqcdm from ModemManager for communication)
++ * 1: NMEA
++ * 2: AT-capable modem port
++ * 3: Modem interface
++ * 4: NDIS
++ */
++ switch (ifnum) {
++ case 0:
++ dev_dbg(dev, "Quectel EC20 DM/DIAG interface found\n");
++ break;
++ case 1:
++ dev_dbg(dev, "Quectel EC20 NMEA GPS interface found\n");
++ break;
++ case 2:
++ case 3:
++ dev_dbg(dev, "Quectel EC20 Modem port found\n");
++ break;
++ case 4:
++ /* Don't claim the QMI/net interface */
++ altsetting = -1;
++ break;
++ }
++
++ return altsetting;
++}
++
+ static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id)
+ {
+ struct usb_host_interface *intf = serial->interface->cur_altsetting;
+@@ -235,6 +269,11 @@ static int qcprobe(struct usb_serial *serial, const struct usb_device_id *id)
+ altsetting = -1;
+ break;
+ case QCSERIAL_G2K:
++ if (nintf == 5 && id->idProduct == QUECTEL_EC20_IDPRODUCT) {
++ altsetting = handle_quectel_ec20(dev, ifnum);
++ goto done;
++ }
++
+ /*
+ * Gobi 2K+ USB layout:
+ * 0: QMI/net
+--
+1.7.9.5
+
diff --git a/target/linux/generic/patches-4.3/193-USB-qmi_wwan-Add-quirk-for-Quectel-EC20-Mini-PCIe-mo.patch b/target/linux/generic/patches-4.3/193-USB-qmi_wwan-Add-quirk-for-Quectel-EC20-Mini-PCIe-mo.patch
new file mode 100644
index 0000000..3b08571
--- /dev/null
+++ b/target/linux/generic/patches-4.3/193-USB-qmi_wwan-Add-quirk-for-Quectel-EC20-Mini-PCIe-mo.patch
@@ -0,0 +1,101 @@
+From fe29727caa7fe434fcb3166df2a62672bc516b54 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Petr=20=C5=A0tetiar?= <ynezz at true.cz>
+Date: Wed, 4 Nov 2015 16:23:37 +0100
+Subject: [PATCH 2/2] USB: qmi_wwan: Add quirk for Quectel EC20 Mini PCIe
+ module
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+This device has same vendor and product IDs as G2K devices, but it has
+different number of interfaces(4 vs 5) and also different interface
+layout where EC20 has QMI on interface 4 instead of 0.
+
+lsusb output:
+
+ Bus 002 Device 003: ID 05c6:9215 Qualcomm, Inc. Acer Gobi 2000
+ Device Descriptor:
+ bLength 18
+ bDescriptorType 1
+ bcdUSB 2.00
+ bDeviceClass 0 (Defined at Interface level)
+ bDeviceSubClass 0
+ bDeviceProtocol 0
+ bMaxPacketSize0 64
+ idVendor 0x05c6 Qualcomm, Inc.
+ idProduct 0x9215 Acer Gobi 2000 Wireless Modem
+ bcdDevice 2.32
+ iManufacturer 1 Quectel
+ iProduct 2 Quectel LTE Module
+ iSerial 0
+ bNumConfigurations 1
+ Configuration Descriptor:
+ bLength 9
+ bDescriptorType 2
+ wTotalLength 209
+ bNumInterfaces 5
+ bConfigurationValue 1
+ iConfiguration 0
+ bmAttributes 0xa0
+ (Bus Powered)
+ Remote Wakeup
+ MaxPower 500mA
+
+Signed-off-by: Petr Štetiar <ynezz at true.cz>
+---
+ drivers/net/usb/qmi_wwan.c | 21 +++++++++++++++++++++
+ 1 file changed, 21 insertions(+)
+
+diff --git a/drivers/net/usb/qmi_wwan.c b/drivers/net/usb/qmi_wwan.c
+index 2a7c1be..b81a32c 100644
+--- a/drivers/net/usb/qmi_wwan.c
++++ b/drivers/net/usb/qmi_wwan.c
+@@ -822,6 +822,7 @@ static const struct usb_device_id products[] = {
+ {QMI_GOBI_DEVICE(0x05c6, 0x9245)}, /* Samsung Gobi 2000 Modem device (VL176) */
+ {QMI_GOBI_DEVICE(0x03f0, 0x251d)}, /* HP Gobi 2000 Modem device (VP412) */
+ {QMI_GOBI_DEVICE(0x05c6, 0x9215)}, /* Acer Gobi 2000 Modem device (VP413) */
++ {QMI_FIXED_INTF(0x05c6, 0x9215, 4)}, /* Quectel EC20 Mini PCIe */
+ {QMI_GOBI_DEVICE(0x05c6, 0x9265)}, /* Asus Gobi 2000 Modem device (VR305) */
+ {QMI_GOBI_DEVICE(0x05c6, 0x9235)}, /* Top Global Gobi 2000 Modem device (VR306) */
+ {QMI_GOBI_DEVICE(0x05c6, 0x9275)}, /* iRex Technologies Gobi 2000 Modem device (VR307) */
+@@ -853,10 +854,24 @@ static const struct usb_device_id products[] = {
+ };
+ MODULE_DEVICE_TABLE(usb, products);
+
++static bool quectel_ec20_detected(struct usb_interface *intf)
++{
++ struct usb_device *dev = interface_to_usbdev(intf);
++
++ if (dev->actconfig &&
++ le16_to_cpu(dev->descriptor.idVendor) == 0x05c6 &&
++ le16_to_cpu(dev->descriptor.idProduct) == 0x9215 &&
++ dev->actconfig->desc.bNumInterfaces == 5)
++ return true;
++
++ return false;
++}
++
+ static int qmi_wwan_probe(struct usb_interface *intf,
+ const struct usb_device_id *prod)
+ {
+ struct usb_device_id *id = (struct usb_device_id *)prod;
++ struct usb_interface_descriptor *desc = &intf->cur_altsetting->desc;
+
+ /* Workaround to enable dynamic IDs. This disables usbnet
+ * blacklisting functionality. Which, if required, can be
+@@ -868,6 +883,12 @@ static int qmi_wwan_probe(struct usb_interface *intf,
+ id->driver_info = (unsigned long)&qmi_wwan_info;
+ }
+
++ /* Quectel EC20 quirk where we've QMI on interface 4 instead of 0 */
++ if (quectel_ec20_detected(intf) && desc->bInterfaceNumber == 0) {
++ dev_dbg(&intf->dev, "Quectel EC20 quirk, skipping interface 0\n");
++ return -ENODEV;
++ }
++
+ return usbnet_probe(intf, id);
+ }
+
+--
+1.7.9.5
+
--
1.7.9.5
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