/**
* Clean up the radio control resources
*
* When we up the command semaphore, everybody possibly held trying to
* execute a command should be granted entry and then they'll see the
* host is quiescing and up it (so it will chain to the next waiter).
* This should not happen (in any case), as we can only remove when
* there are no handles open...
*/
static void whcrc_remove(struct umc_dev *umc_dev)
{
struct whcrc *whcrc = umc_get_drvdata(umc_dev);
struct uwb_rc *uwb_rc = whcrc->uwb_rc;
umc_set_drvdata(umc_dev, NULL);
uwb_rc_rm(uwb_rc);
whcrc_release_rc_umc(whcrc);
kfree(whcrc);
uwb_rc_put(uwb_rc);
}
static void i1480u_rm(struct i1480u *i1480u)
{
struct uwb_rc *rc = i1480u->wlp.rc;
usb_set_intfdata(i1480u->usb_iface, NULL);
#ifdef i1480u_FLOW_CONTROL
usb_kill_urb(i1480u->notif_urb);
usb_free_urb(i1480u->notif_urb);
#endif
wlp_remove(&i1480u->wlp);
uwb_rc_put(rc);
usb_put_dev(i1480u->usb_dev);
}
/**
* Initialize the radio controller.
*
* NOTE: we setup whcrc->uwb_rc before calling uwb_rc_add(); in the
* IRQ handler we use that to determine if the hw is ready to
* handle events. Looks like a race condition, but it really is
* not.
*/
static
int whcrc_probe(struct umc_dev *umc_dev)
{
int result;
struct uwb_rc *uwb_rc;
struct whcrc *whcrc;
struct device *dev = &umc_dev->dev;
result = -ENOMEM;
uwb_rc = uwb_rc_alloc();
if (uwb_rc == NULL) {
dev_err(dev, "unable to allocate RC instance\n");
goto error_rc_alloc;
}
whcrc = kzalloc(sizeof(*whcrc), GFP_KERNEL);
if (whcrc == NULL) {
dev_err(dev, "unable to allocate WHC-RC instance\n");
goto error_alloc;
}
whcrc_init(whcrc);
whcrc->umc_dev = umc_dev;
result = whcrc_setup_rc_umc(whcrc);
if (result < 0) {
dev_err(dev, "Can't setup RC UMC interface: %d\n", result);
goto error_setup_rc_umc;
}
whcrc->uwb_rc = uwb_rc;
uwb_rc->owner = THIS_MODULE;
uwb_rc->cmd = whcrc_cmd;
uwb_rc->reset = whcrc_reset;
uwb_rc->start = whcrc_start_rc;
uwb_rc->stop = whcrc_stop_rc;
result = uwb_rc_add(uwb_rc, dev, whcrc);
if (result < 0)
goto error_rc_add;
umc_set_drvdata(umc_dev, whcrc);
return 0;
error_rc_add:
whcrc_release_rc_umc(whcrc);
error_setup_rc_umc:
kfree(whcrc);
error_alloc:
uwb_rc_put(uwb_rc);
error_rc_alloc:
return result;
}
static void whc_remove(struct umc_dev *umc)
{
struct usb_hcd *usb_hcd = dev_get_drvdata(&umc->dev);
struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
struct whc *whc = wusbhc_to_whc(wusbhc);
if (usb_hcd) {
whc_dbg_clean_up(whc);
wusbhc_b_destroy(wusbhc);
usb_remove_hcd(usb_hcd);
wusbhc_destroy(wusbhc);
uwb_rc_put(wusbhc->uwb_rc);
whc_clean_up(whc);
usb_put_hcd(usb_hcd);
}
}
static int whc_probe(struct umc_dev *umc)
{
int ret = -ENOMEM;
struct usb_hcd *usb_hcd;
struct wusbhc *wusbhc = NULL;
struct whc *whc = NULL;
struct device *dev = &umc->dev;
usb_hcd = usb_create_hcd(&whc_hc_driver, dev, "whci");
if (usb_hcd == NULL) {
dev_err(dev, "unable to create hcd\n");
goto error;
}
usb_hcd->wireless = 1;
usb_hcd->self.sg_tablesize = 2048; /* somewhat arbitrary */
wusbhc = usb_hcd_to_wusbhc(usb_hcd);
whc = wusbhc_to_whc(wusbhc);
whc->umc = umc;
ret = whc_init(whc);
if (ret)
goto error;
wusbhc->dev = dev;
wusbhc->uwb_rc = uwb_rc_get_by_grandpa(umc->dev.parent);
if (!wusbhc->uwb_rc) {
ret = -ENODEV;
dev_err(dev, "cannot get radio controller\n");
goto error;
}
if (whc->n_devices > USB_MAXCHILDREN) {
dev_warn(dev, "USB_MAXCHILDREN too low for WUSB adapter (%u ports)\n",
whc->n_devices);
wusbhc->ports_max = USB_MAXCHILDREN;
} else
wusbhc->ports_max = whc->n_devices;
wusbhc->mmcies_max = whc->n_mmc_ies;
wusbhc->start = whc_wusbhc_start;
wusbhc->stop = whc_wusbhc_stop;
wusbhc->mmcie_add = whc_mmcie_add;
wusbhc->mmcie_rm = whc_mmcie_rm;
wusbhc->dev_info_set = whc_dev_info_set;
wusbhc->bwa_set = whc_bwa_set;
wusbhc->set_num_dnts = whc_set_num_dnts;
wusbhc->set_ptk = whc_set_ptk;
wusbhc->set_gtk = whc_set_gtk;
ret = wusbhc_create(wusbhc);
if (ret)
goto error_wusbhc_create;
ret = usb_add_hcd(usb_hcd, whc->umc->irq, IRQF_SHARED);
if (ret) {
dev_err(dev, "cannot add HCD: %d\n", ret);
goto error_usb_add_hcd;
}
ret = wusbhc_b_create(wusbhc);
if (ret) {
dev_err(dev, "WUSBHC phase B setup failed: %d\n", ret);
goto error_wusbhc_b_create;
}
whc_dbg_init(whc);
return 0;
error_wusbhc_b_create:
usb_remove_hcd(usb_hcd);
error_usb_add_hcd:
wusbhc_destroy(wusbhc);
error_wusbhc_create:
uwb_rc_put(wusbhc->uwb_rc);
error:
whc_clean_up(whc);
if (usb_hcd)
usb_put_hcd(usb_hcd);
return ret;
}
static
int i1480u_add(struct i1480u *i1480u, struct usb_interface *iface)
{
int result = -ENODEV;
struct wlp *wlp = &i1480u->wlp;
struct usb_device *usb_dev = interface_to_usbdev(iface);
struct net_device *net_dev = i1480u->net_dev;
struct uwb_rc *rc;
struct uwb_dev *uwb_dev;
#ifdef i1480u_FLOW_CONTROL
struct usb_endpoint_descriptor *epd;
#endif
i1480u->usb_dev = usb_get_dev(usb_dev);
i1480u->usb_iface = iface;
rc = uwb_rc_get_by_grandpa(&i1480u->usb_dev->dev);
if (rc == NULL) {
dev_err(&iface->dev, "Cannot get associated UWB Radio "
"Controller\n");
goto out;
}
wlp->xmit_frame = i1480u_xmit_frame;
wlp->fill_device_info = i1480u_fill_device_info;
wlp->stop_queue = i1480u_stop_queue;
wlp->start_queue = i1480u_start_queue;
result = wlp_setup(wlp, rc, net_dev);
if (result < 0) {
dev_err(&iface->dev, "Cannot setup WLP\n");
goto error_wlp_setup;
}
result = 0;
ether_setup(net_dev); /* make it an etherdevice */
uwb_dev = &rc->uwb_dev;
/* FIXME: hookup address change notifications? */
memcpy(net_dev->dev_addr, uwb_dev->mac_addr.data,
sizeof(net_dev->dev_addr));
net_dev->hard_header_len = sizeof(struct untd_hdr_cmp)
+ sizeof(struct wlp_tx_hdr)
+ WLP_DATA_HLEN
+ ETH_HLEN;
net_dev->mtu = 3500;
net_dev->tx_queue_len = 20; /* FIXME: maybe use 1000? */
/* net_dev->flags &= ~IFF_BROADCAST; FIXME: BUG in firmware */
/* FIXME: multicast disabled */
net_dev->flags &= ~IFF_MULTICAST;
net_dev->features &= ~NETIF_F_SG;
net_dev->features &= ~NETIF_F_FRAGLIST;
/* All NETIF_F_*_CSUM disabled */
net_dev->features |= NETIF_F_HIGHDMA;
net_dev->watchdog_timeo = 5*HZ; /* FIXME: a better default? */
net_dev->netdev_ops = &i1480u_netdev_ops;
#ifdef i1480u_FLOW_CONTROL
/* Notification endpoint setup (submitted when we open the device) */
i1480u->notif_urb = usb_alloc_urb(0, GFP_KERNEL);
if (i1480u->notif_urb == NULL) {
dev_err(&iface->dev, "Unable to allocate notification URB\n");
result = -ENOMEM;
goto error_urb_alloc;
}
epd = &iface->cur_altsetting->endpoint[0].desc;
usb_fill_int_urb(i1480u->notif_urb, usb_dev,
usb_rcvintpipe(usb_dev, epd->bEndpointAddress),
i1480u->notif_buffer, sizeof(i1480u->notif_buffer),
i1480u_notif_cb, i1480u, epd->bInterval);
#endif
i1480u->tx_inflight.max = i1480u_TX_INFLIGHT_MAX;
i1480u->tx_inflight.threshold = i1480u_TX_INFLIGHT_THRESHOLD;
i1480u->tx_inflight.restart_ts = jiffies;
usb_set_intfdata(iface, i1480u);
return result;
#ifdef i1480u_FLOW_CONTROL
error_urb_alloc:
#endif
wlp_remove(wlp);
error_wlp_setup:
uwb_rc_put(rc);
out:
usb_put_dev(i1480u->usb_dev);
return result;
}
