qmi_wwan: Add support for Quectel EG12/EM12

Quectel EG12 (module)/EM12 (M.2 card) is a Cat. 12 LTE modem. The modem
behaves in the same way as the EP06, so the "set DTR"-quirk must be
applied and the diagnostic-interface check performed. Since the
diagnostic-check now applies to more modems, I have renamed the function
from quectel_ep06_diag_detected() to quectel_diag_detected().

Signed-off-by: Kristian Evensen <kristian.evensen@gmail.com>
Acked-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 18 insertions, 8 deletions

diff --git a/drivers/net/usb/qmi_wwan.c b/drivers/net/usb/qmi_wwan.c
index 18af2f8eee96..74bebbdb4b15 100644
--- a/drivers/net/usb/qmi_wwan.c
+++ b/drivers/net/usb/qmi_wwan.c
@@ -976,6 +976,13 @@ static const struct usb_device_id products[] = {
                                               0xff),
                 .driver_info        = (unsigned long)&qmi_wwan_info_quirk_dtr,
         },
+        {       /* Quectel EG12/EM12 */
+                USB_DEVICE_AND_INTERFACE_INFO(0x2c7c, 0x0512,
+                                              USB_CLASS_VENDOR_SPEC,
+                                              USB_SUBCLASS_VENDOR_SPEC,
+                                              0xff),
+                .driver_info        = (unsigned long)&qmi_wwan_info_quirk_dtr,
+        },
 
         /* 3. Combined interface devices matching on interface number */
         {QMI_FIXED_INTF(0x0408, 0xea42, 4)},    /* Yota / Megafon M100-1 */
@@ -1343,17 +1350,20 @@ static bool quectel_ec20_detected(struct usb_interface *intf)
         return false;
 }
 
-static bool quectel_ep06_diag_detected(struct usb_interface *intf)
+static bool quectel_diag_detected(struct usb_interface *intf)
 {
         struct usb_device *dev = interface_to_usbdev(intf);
         struct usb_interface_descriptor intf_desc = intf->cur_altsetting->desc;
+        u16 id_vendor = le16_to_cpu(dev->descriptor.idVendor);
+        u16 id_product = le16_to_cpu(dev->descriptor.idProduct);
 
-        if (le16_to_cpu(dev->descriptor.idVendor) == 0x2c7c &&
-            le16_to_cpu(dev->descriptor.idProduct) == 0x0306 &&
-            intf_desc.bNumEndpoints == 2)
-                return true;
+        if (id_vendor != 0x2c7c || intf_desc.bNumEndpoints != 2)
+                return false;
 
-        return false;
+        if (id_product == 0x0306 || id_product == 0x0512)
+                return true;
+        else
+                return false;
 }
 
 static int qmi_wwan_probe(struct usb_interface *intf,
@@ -1390,13 +1400,13 @@ static int qmi_wwan_probe(struct usb_interface *intf,
                 return -ENODEV;
         }
 
-        /* Quectel EP06/EM06/EG06 supports dynamic interface configuration, so
+        /* Several Quectel modems supports dynamic interface configuration, so
          * we need to match on class/subclass/protocol. These values are
          * identical for the diagnostic- and QMI-interface, but bNumEndpoints is
          * different. Ignore the current interface if the number of endpoints
          * the number for the diag interface (two).
          */
-        if (quectel_ep06_diag_detected(intf))
+        if (quectel_diag_detected(intf))
                 return -ENODEV;
 
         return usbnet_probe(intf, id);