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[media] rtl28xxu: dynamic USB ID support 

DVB USB core refuses to	load driver when current USB ID
does not match IDs on driver table. Due to that dynamic
IDs does not work. Replace reference design ID by dynamic
ID in .probe() in order to get it working.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Antti Palosaari 2012-03-19 16:27:47 -03:00 committed by Mauro Carvalho Chehab
parent 662f9602bd
commit 943a903459
1 changed files with 25 additions and 0 deletions
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25
drivers/media/dvb/dvb-usb/rtl28xxu.c
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@ -909,6 +909,8 @@ static int rtl28xxu_probe(struct usb_interface *intf,
int ret, i;
int properties_count = ARRAY_SIZE(rtl28xxu_properties);
struct dvb_usb_device *d;
struct usb_device *udev;
bool found;
deb_info("%s: interface=%d\n", __func__,
intf->cur_altsetting->desc.bInterfaceNumber);
@ -916,6 +918,29 @@ static int rtl28xxu_probe(struct usb_interface *intf,
if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
return 0;
/* Dynamic USB ID support. Replaces first device ID with current one .*/
udev = interface_to_usbdev(intf);
for (i = 0, found = false; i < ARRAY_SIZE(rtl28xxu_table) - 1; i++) {
if (rtl28xxu_table[i].idVendor ==
le16_to_cpu(udev->descriptor.idVendor) &&
rtl28xxu_table[i].idProduct ==
le16_to_cpu(udev->descriptor.idProduct)) {
found = true;
break;
}
}
if (!found) {
deb_info("%s: using dynamic ID %04x:%04x\n", __func__,
le16_to_cpu(udev->descriptor.idVendor),
le16_to_cpu(udev->descriptor.idProduct));
rtl28xxu_properties[0].devices[0].warm_ids[0]->idVendor =
le16_to_cpu(udev->descriptor.idVendor);
rtl28xxu_properties[0].devices[0].warm_ids[0]->idProduct =
le16_to_cpu(udev->descriptor.idProduct);
}
for (i = 0; i < properties_count; i++) {
ret = dvb_usb_device_init(intf, &rtl28xxu_properties[i],
THIS_MODULE, &d, adapter_nr);