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Date: Wed, 27 Apr 2016 01:02:21 +0200
From: Ben Hutchings <ben@...adent.org.uk>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC: akpm@...ux-foundation.org,
"Petr Štetiar" <ynezz@...e.cz>,
"David S. Miller" <davem@...emloft.net>,
"Bjørn Mork" <bjorn@...k.no>
Subject: [PATCH 3.16 193/217] USB: qmi_wwan: Add quirk for Quectel EC20
Mini PCIe module
3.16.35-rc1 review patch. If anyone has any objections, please let me know.
------------------
From: Petr Štetiar <ynezz@...e.cz>
commit b3d8cf019fb9dd28389b08da7bf54ffabf453ed3 upstream.
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@...e.cz>
Acked-by: Bjørn Mork <bjorn@...k.no>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
drivers/net/usb/qmi_wwan.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
--- a/drivers/net/usb/qmi_wwan.c
+++ b/drivers/net/usb/qmi_wwan.c
@@ -823,6 +823,7 @@ static const struct usb_device_id produc
{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) */
@@ -854,10 +855,24 @@ static const struct usb_device_id produc
};
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
@@ -869,6 +884,12 @@ static int qmi_wwan_probe(struct usb_int
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);
}
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