On Thu, Nov 12, 2009 at 10:54 PM, hong zhang <henryzhang62@xxxxxxxxx> wrote:
> List,
>
> I bought WN721N ar9721 but it could not be initialized. device_id is 9721
> in function ath_init_htc_priv(). After ah passed to ath9k_hw_init(ah),
>device_id becomes 0.
The device ID on the ath_hw comes all the way from the usb device ID.
This is initialized based on the value passed during probe:
ah->hw_version.devid = devid;
That is when probe_htc_9k_device() is called. This is the hw_probe
callback for the 9k atheros hardware family. This gets called by the
HTC driver during ath_htc_hw_probe() :
int ath_htc_hw_probe(void *hif_handle, enum ath_hif_transports transport)
{
...
target->device_id = hif->ops->get_device_id(hif_handle);
...
r = ath_htc_9k_hw_ops->hw_probe(target, target->dev, target->device_id);
if (r) {
dev_err(target->dev, "initializing 0x%0x device failed: %d\n",
target->device_id, r);
goto fail;
}
...
}
The hif_handle is passed by HIF during probe, which is done in
ath_hif_usb_probe():
static int ath_hif_usb_probe(struct usb_interface *interface,
const struct usb_device_id *id)
{
....
hif_dev->device_id = id->idProduct;
....
/* Probe hardware now */
r = ath_htc_hw_probe(hif_dev, ATH_HIF_USB);
if (r) {
dev_err(&hif_dev->udev->dev, "hw probe failed\n");
goto fail;
}
....
}
> Very strange. Does anyone have similar experience?
Can you paste the output with debugging completely enabled?
modprobe ath9k_htc debug=0xfffffff
before plugging the device in. Also can you please boot with
ignore_loglevel appended to your kernel boot paramters for grub.
Luis
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