v4.19.13 snapshot.
diff --git a/drivers/usb/host/whci/hcd.c b/drivers/usb/host/whci/hcd.c
new file mode 100644
index 0000000..8af9dcf
--- /dev/null
+++ b/drivers/usb/host/whci/hcd.c
@@ -0,0 +1,356 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Wireless Host Controller (WHC) driver.
+ *
+ * Copyright (C) 2007 Cambridge Silicon Radio Ltd.
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/uwb/umc.h>
+
+#include "../../wusbcore/wusbhc.h"
+
+#include "whcd.h"
+
+/*
+ * One time initialization.
+ *
+ * Nothing to do here.
+ */
+static int whc_reset(struct usb_hcd *usb_hcd)
+{
+ return 0;
+}
+
+/*
+ * 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;
+}
+
+
+/*
+ * 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);
+}
+
+static int whc_get_frame_number(struct usb_hcd *usb_hcd)
+{
+ /* Frame numbers are not applicable to WUSB. */
+ return -ENOSYS;
+}
+
+
+/*
+ * 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;
+}
+
+/*
+ * 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;
+}
+
+/*
+ * 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);
+ }
+}
+
+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);
+}
+
+
+static const struct hc_driver whc_hc_driver = {
+ .description = "whci-hcd",
+ .product_desc = "Wireless host controller",
+ .hcd_priv_size = sizeof(struct whc) - sizeof(struct usb_hcd),
+ .irq = whc_int_handler,
+ .flags = HCD_USB2,
+
+ .reset = whc_reset,
+ .start = whc_start,
+ .stop = whc_stop,
+ .get_frame_number = whc_get_frame_number,
+ .urb_enqueue = whc_urb_enqueue,
+ .urb_dequeue = whc_urb_dequeue,
+ .endpoint_disable = whc_endpoint_disable,
+ .endpoint_reset = whc_endpoint_reset,
+
+ .hub_status_data = wusbhc_rh_status_data,
+ .hub_control = wusbhc_rh_control,
+ .start_port_reset = wusbhc_rh_start_port_reset,
+};
+
+static int whc_probe(struct umc_dev *umc)
+{
+ int ret;
+ struct usb_hcd *usb_hcd;
+ struct wusbhc *wusbhc;
+ struct whc *whc;
+ 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");
+ return -ENOMEM;
+ }
+
+ 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_whc_init;
+
+ 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_uwb_rc;
+ }
+
+ 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;
+ }
+ device_wakeup_enable(usb_hcd->self.controller);
+
+ 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_uwb_rc:
+ whc_clean_up(whc);
+error_whc_init:
+ usb_put_hcd(usb_hcd);
+ return ret;
+}
+
+
+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 struct umc_driver whci_hc_driver = {
+ .name = "whci-hcd",
+ .cap_id = UMC_CAP_ID_WHCI_WUSB_HC,
+ .probe = whc_probe,
+ .remove = whc_remove,
+};
+
+static int __init whci_hc_driver_init(void)
+{
+ return umc_driver_register(&whci_hc_driver);
+}
+module_init(whci_hc_driver_init);
+
+static void __exit whci_hc_driver_exit(void)
+{
+ umc_driver_unregister(&whci_hc_driver);
+}
+module_exit(whci_hc_driver_exit);
+
+/* PCI device ID's that we handle (so it gets loaded) */
+static struct pci_device_id __used whci_hcd_id_table[] = {
+ { PCI_DEVICE_CLASS(PCI_CLASS_WIRELESS_WHCI, ~0) },
+ { /* empty last entry */ }
+};
+MODULE_DEVICE_TABLE(pci, whci_hcd_id_table);
+
+MODULE_DESCRIPTION("WHCI Wireless USB host controller driver");
+MODULE_AUTHOR("Cambridge Silicon Radio Ltd.");
+MODULE_LICENSE("GPL");