irqreturn_t whc_int_handler(struct usb_hcd *hcd)
{
struct wusbhc *wusbhc = usb_hcd_to_wusbhc(hcd);
struct whc *whc = wusbhc_to_whc(wusbhc);
u32 sts;
sts = le_readl(whc->base + WUSBSTS);
if (!(sts & WUSBSTS_INT_MASK))
return IRQ_NONE;
le_writel(sts & WUSBSTS_INT_MASK, whc->base + WUSBSTS);
if (sts & WUSBSTS_GEN_CMD_DONE)
wake_up(&whc->cmd_wq);
if (sts & WUSBSTS_HOST_ERR)
dev_err(&whc->umc->dev, "FIXME: host system error\n");
if (sts & WUSBSTS_ASYNC_SCHED_SYNCED)
wake_up(&whc->async_list_wq);
if (sts & WUSBSTS_PERIODIC_SCHED_SYNCED)
wake_up(&whc->periodic_list_wq);
if (sts & WUSBSTS_DNTS_INT)
queue_work(whc->workqueue, &whc->dn_work);
if (sts & (WUSBSTS_INT | WUSBSTS_ERR_INT))
transfer_done(whc);
return IRQ_HANDLED;
}
/*
* Start the wireless host controller.
*
* Start device notification.
*
* Put hc into run state, set DNTS parameters.
*/
static int whc_start(struct usb_hcd *usb_hcd)
{
struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
struct whc *whc = wusbhc_to_whc(wusbhc);
u8 bcid;
int ret;
mutex_lock(&wusbhc->mutex);
le_writel(WUSBINTR_GEN_CMD_DONE
| WUSBINTR_HOST_ERR
| WUSBINTR_ASYNC_SCHED_SYNCED
| WUSBINTR_DNTS_INT
| WUSBINTR_ERR_INT
| WUSBINTR_INT,
whc->base + WUSBINTR);
/* set cluster ID */
bcid = wusb_cluster_id_get();
ret = whc_set_cluster_id(whc, bcid);
if (ret < 0)
goto out;
wusbhc->cluster_id = bcid;
/* start HC */
whc_write_wusbcmd(whc, WUSBCMD_RUN, WUSBCMD_RUN);
usb_hcd->uses_new_polling = 1;
set_bit(HCD_FLAG_POLL_RH, &usb_hcd->flags);
usb_hcd->state = HC_STATE_RUNNING;
out:
mutex_unlock(&wusbhc->mutex);
return ret;
}
int wusbhc_rh_start_port_reset(struct usb_hcd *usb_hcd, unsigned port_idx)
{
struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
dev_err(wusbhc->dev, "%s (%p [%p], port_idx %u) UNIMPLEMENTED\n",
__func__, usb_hcd, wusbhc, port_idx);
WARN_ON(1);
return -ENOSYS;
}
int wusbhc_rh_resume(struct usb_hcd *usb_hcd)
{
struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
dev_err(wusbhc->dev, "%s (%p [%p]) UNIMPLEMENTED\n", __func__,
usb_hcd, wusbhc);
/* dump_stack(); */
return -ENOSYS;
}
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);
}
}
/*
* Return the hub change status bitmap
*
* The bits in the change status bitmap are cleared when a
* ClearPortFeature request is issued (USB2.0[11.12.3,11.12.4].
*
* @wusbhc is assumed referenced and @wusbhc->mutex unlocked.
*
* WARNING!! This gets called from atomic context; we cannot get the
* mutex--the only race condition we can find is some bit
* changing just after we copy it, which shouldn't be too
* big of a problem [and we can't make it an spinlock
* because other parts need to take it and sleep] .
*
* @usb_hcd is refcounted, so it won't disappear under us
* and before killing a host, the polling of the root hub
* would be stopped anyway.
*/
int wusbhc_rh_status_data(struct usb_hcd *usb_hcd, char *_buf)
{
struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
size_t cnt, size;
unsigned long *buf = (unsigned long *) _buf;
/* WE DON'T LOCK, see comment */
size = wusbhc->ports_max + 1 /* hub bit */;
size = (size + 8 - 1) / 8; /* round to bytes */
for (cnt = 0; cnt < wusbhc->ports_max; cnt++)
if (wusb_port_by_idx(wusbhc, cnt)->change)
set_bit(cnt + 1, buf);
else
clear_bit(cnt + 1, buf);
return size;
}
/*
* Wait for all URBs to the endpoint to be completed, then delete the
* qset.
*/
static void whc_endpoint_disable(struct usb_hcd *usb_hcd,
struct usb_host_endpoint *ep)
{
struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
struct whc *whc = wusbhc_to_whc(wusbhc);
struct whc_qset *qset;
qset = ep->hcpriv;
if (qset) {
ep->hcpriv = NULL;
if (usb_endpoint_xfer_bulk(&ep->desc)
|| usb_endpoint_xfer_control(&ep->desc))
asl_qset_delete(whc, qset);
else
pzl_qset_delete(whc, qset);
}
}
/*
* Stop the wireless host controller.
*
* Stop device notification.
*
* Wait for pending transfer to stop? Put hc into stop state?
*/
static void whc_stop(struct usb_hcd *usb_hcd)
{
struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
struct whc *whc = wusbhc_to_whc(wusbhc);
mutex_lock(&wusbhc->mutex);
/* stop HC */
le_writel(0, whc->base + WUSBINTR);
whc_write_wusbcmd(whc, WUSBCMD_RUN, 0);
whci_wait_for(&whc->umc->dev, whc->base + WUSBSTS,
WUSBSTS_HCHALTED, WUSBSTS_HCHALTED,
100, "HC to halt");
wusb_cluster_id_put(wusbhc->cluster_id);
mutex_unlock(&wusbhc->mutex);
}
/*
* Entry point for Root Hub operations
*
* @wusbhc is assumed referenced and @wusbhc->mutex unlocked.
*/
int wusbhc_rh_control(struct usb_hcd *usb_hcd, u16 reqntype, u16 wValue,
u16 wIndex, char *buf, u16 wLength)
{
int result = -ENOSYS;
struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
switch (reqntype) {
case GetHubDescriptor:
result = wusbhc_rh_get_hub_descr(
wusbhc, wValue, wIndex,
(struct usb_hub_descriptor *) buf, wLength);
break;
case ClearHubFeature:
result = wusbhc_rh_clear_hub_feat(wusbhc, wValue);
break;
case GetHubStatus:
result = wusbhc_rh_get_hub_status(wusbhc, (u32 *)buf, wLength);
break;
case SetPortFeature:
result = wusbhc_rh_set_port_feat(wusbhc, wValue, wIndex >> 8,
(wIndex & 0xff) - 1);
break;
case ClearPortFeature:
result = wusbhc_rh_clear_port_feat(wusbhc, wValue, wIndex >> 8,
(wIndex & 0xff) - 1);
break;
case GetPortStatus:
result = wusbhc_rh_get_port_status(wusbhc, wIndex - 1,
(u32 *)buf, wLength);
break;
case SetHubFeature:
default:
dev_err(wusbhc->dev, "%s (%p [%p], %x, %x, %x, %p, %x) "
"UNIMPLEMENTED\n", __func__, usb_hcd, wusbhc, reqntype,
wValue, wIndex, buf, wLength);
/* dump_stack(); */
result = -ENOSYS;
}
return result;
}
/*
* Remove a queued URB from the ASL or PZL.
*/
static int whc_urb_dequeue(struct usb_hcd *usb_hcd, struct urb *urb, int status)
{
struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
struct whc *whc = wusbhc_to_whc(wusbhc);
int ret;
switch (usb_pipetype(urb->pipe)) {
case PIPE_INTERRUPT:
ret = pzl_urb_dequeue(whc, urb, status);
break;
case PIPE_ISOCHRONOUS:
ret = -ENOTSUPP;
break;
case PIPE_CONTROL:
case PIPE_BULK:
default:
ret = asl_urb_dequeue(whc, urb, status);
break;
};
return ret;
}
static void whc_endpoint_reset(struct usb_hcd *usb_hcd,
struct usb_host_endpoint *ep)
{
struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
struct whc *whc = wusbhc_to_whc(wusbhc);
struct whc_qset *qset;
unsigned long flags;
spin_lock_irqsave(&whc->lock, flags);
qset = ep->hcpriv;
if (qset) {
qset->remove = 1;
qset->reset = 1;
if (usb_endpoint_xfer_bulk(&ep->desc)
|| usb_endpoint_xfer_control(&ep->desc))
queue_work(whc->workqueue, &whc->async_work);
else
queue_work(whc->workqueue, &whc->periodic_work);
}
spin_unlock_irqrestore(&whc->lock, flags);
}
/*
* Queue an URB to the ASL or PZL
*/
static int whc_urb_enqueue(struct usb_hcd *usb_hcd, struct urb *urb,
gfp_t mem_flags)
{
struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
struct whc *whc = wusbhc_to_whc(wusbhc);
int ret;
switch (usb_pipetype(urb->pipe)) {
case PIPE_INTERRUPT:
ret = pzl_urb_enqueue(whc, urb, mem_flags);
break;
case PIPE_ISOCHRONOUS:
dev_err(&whc->umc->dev, "isochronous transfers unsupported\n");
ret = -ENOTSUPP;
break;
case PIPE_CONTROL:
case PIPE_BULK:
default:
ret = asl_urb_enqueue(whc, urb, mem_flags);
break;
};
return ret;
}
/*
* Return the hub change status bitmap
*
* The bits in the change status bitmap are cleared when a
* ClearPortFeature request is issued (USB2.0[11.12.3,11.12.4].
*
* @wusbhc is assumed referenced and @wusbhc->mutex unlocked.
*
* WARNING!! This gets called from atomic context; we cannot get the
* mutex--the only race condition we can find is some bit
* changing just after we copy it, which shouldn't be too
* big of a problem [and we can't make it an spinlock
* because other parts need to take it and sleep] .
*
* @usb_hcd is refcounted, so it won't disappear under us
* and before killing a host, the polling of the root hub
* would be stopped anyway.
*/
int wusbhc_rh_status_data(struct usb_hcd *usb_hcd, char *_buf)
{
struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
size_t cnt, size, bits_set = 0;
/* WE DON'T LOCK, see comment */
/* round up to bytes. Hub bit is bit 0 so add 1. */
size = DIV_ROUND_UP(wusbhc->ports_max + 1, 8);
/* clear the output buffer. */
memset(_buf, 0, size);
/* set the bit for each changed port. */
for (cnt = 0; cnt < wusbhc->ports_max; cnt++) {
if (wusb_port_by_idx(wusbhc, cnt)->change) {
const int bitpos = cnt+1;
_buf[bitpos/8] |= (1 << (bitpos % 8));
bits_set++;
}
}
return bits_set ? size : 0;
}
/**
* Extract the wusbhc that corresponds to a USB Host Controller class device
*
* WARNING! Apply only if @dev is that of a
* wusbhc.usb_hcd.self->class_dev; otherwise, you loose.
*/
static struct wusbhc *usbhc_dev_to_wusbhc(struct device *dev)
{
struct usb_bus *usb_bus = dev_get_drvdata(dev);
struct usb_hcd *usb_hcd = bus_to_hcd(usb_bus);
return usb_hcd_to_wusbhc(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;
}