[PATCH] zd1211rw: Convert installer CDROM device into WLAN device
Some devices identify themselves as a virtual USB CDROM drive. The virtual CD
includes the windows driver. We aren't interested in this, so we eject the
virtual CDROM and then the real wireless device appears.
Patch fixed over the earlier version to not leak cmd, thanks to Michael Buesch
for spotting that.
Signed-off-by: Daniel Drake <dsd@gentoo.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/zd1211rw/zd_usb.c b/drivers/net/wireless/zd1211rw/zd_usb.c
index 347ebc1..83e23c3 100644
--- a/drivers/net/wireless/zd1211rw/zd_usb.c
+++ b/drivers/net/wireless/zd1211rw/zd_usb.c
@@ -48,6 +48,8 @@
{ USB_DEVICE(0x0ace, 0x1215), .driver_info = DEVICE_ZD1211B },
{ USB_DEVICE(0x157e, 0x300d), .driver_info = DEVICE_ZD1211B },
{ USB_DEVICE(0x079b, 0x0062), .driver_info = DEVICE_ZD1211B },
+ /* "Driverless" devices that need ejecting */
+ { USB_DEVICE(0x0ace, 0x2011), .driver_info = DEVICE_INSTALLER },
{}
};
@@ -951,6 +953,55 @@
#define print_id(udev) do { } while (0)
#endif
+static int eject_installer(struct usb_interface *intf)
+{
+ struct usb_device *udev = interface_to_usbdev(intf);
+ struct usb_host_interface *iface_desc = &intf->altsetting[0];
+ struct usb_endpoint_descriptor *endpoint;
+ unsigned char *cmd;
+ u8 bulk_out_ep;
+ int r;
+
+ /* Find bulk out endpoint */
+ endpoint = &iface_desc->endpoint[1].desc;
+ if ((endpoint->bEndpointAddress & USB_TYPE_MASK) == USB_DIR_OUT &&
+ (endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
+ USB_ENDPOINT_XFER_BULK) {
+ bulk_out_ep = endpoint->bEndpointAddress;
+ } else {
+ dev_err(&udev->dev,
+ "zd1211rw: Could not find bulk out endpoint\n");
+ return -ENODEV;
+ }
+
+ cmd = kzalloc(31, GFP_KERNEL);
+ if (cmd == NULL)
+ return -ENODEV;
+
+ /* USB bulk command block */
+ cmd[0] = 0x55; /* bulk command signature */
+ cmd[1] = 0x53; /* bulk command signature */
+ cmd[2] = 0x42; /* bulk command signature */
+ cmd[3] = 0x43; /* bulk command signature */
+ cmd[14] = 6; /* command length */
+
+ cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */
+ cmd[19] = 0x2; /* eject disc */
+
+ dev_info(&udev->dev, "Ejecting virtual installer media...\n");
+ r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep),
+ cmd, 31, NULL, 2000);
+ kfree(cmd);
+ if (r)
+ return r;
+
+ /* At this point, the device disconnects and reconnects with the real
+ * ID numbers. */
+
+ usb_set_intfdata(intf, NULL);
+ return 0;
+}
+
static int probe(struct usb_interface *intf, const struct usb_device_id *id)
{
int r;
@@ -959,6 +1010,9 @@
print_id(udev);
+ if (id->driver_info & DEVICE_INSTALLER)
+ return eject_installer(intf);
+
switch (udev->speed) {
case USB_SPEED_LOW:
case USB_SPEED_FULL:
@@ -1024,6 +1078,11 @@
struct zd_mac *mac = zd_netdev_mac(netdev);
struct zd_usb *usb = &mac->chip.usb;
+ /* Either something really bad happened, or we're just dealing with
+ * a DEVICE_INSTALLER. */
+ if (netdev == NULL)
+ return;
+
dev_dbg_f(zd_usb_dev(usb), "\n");
zd_netdev_disconnect(netdev);