368 lines
8.5 KiB
C
368 lines
8.5 KiB
C
/*
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* Wireless Host Controller (WHC) driver.
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*
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* Copyright (C) 2007 Cambridge Silicon Radio Ltd.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version
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* 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/uwb/umc.h>
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#include "../../wusbcore/wusbhc.h"
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#include "whcd.h"
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/*
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* One time initialization.
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*
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* Nothing to do here.
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*/
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static int whc_reset(struct usb_hcd *usb_hcd)
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{
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return 0;
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}
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/*
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* Start the wireless host controller.
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*
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* Start device notification.
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*
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* Put hc into run state, set DNTS parameters.
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*/
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static int whc_start(struct usb_hcd *usb_hcd)
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{
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struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
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struct whc *whc = wusbhc_to_whc(wusbhc);
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u8 bcid;
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int ret;
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mutex_lock(&wusbhc->mutex);
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le_writel(WUSBINTR_GEN_CMD_DONE
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| WUSBINTR_HOST_ERR
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| WUSBINTR_ASYNC_SCHED_SYNCED
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| WUSBINTR_DNTS_INT
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| WUSBINTR_ERR_INT
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| WUSBINTR_INT,
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whc->base + WUSBINTR);
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/* set cluster ID */
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bcid = wusb_cluster_id_get();
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ret = whc_set_cluster_id(whc, bcid);
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if (ret < 0)
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goto out;
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wusbhc->cluster_id = bcid;
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/* start HC */
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whc_write_wusbcmd(whc, WUSBCMD_RUN, WUSBCMD_RUN);
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usb_hcd->uses_new_polling = 1;
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set_bit(HCD_FLAG_POLL_RH, &usb_hcd->flags);
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usb_hcd->state = HC_STATE_RUNNING;
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out:
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mutex_unlock(&wusbhc->mutex);
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return ret;
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}
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/*
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* Stop the wireless host controller.
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*
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* Stop device notification.
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*
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* Wait for pending transfer to stop? Put hc into stop state?
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*/
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static void whc_stop(struct usb_hcd *usb_hcd)
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{
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struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
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struct whc *whc = wusbhc_to_whc(wusbhc);
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mutex_lock(&wusbhc->mutex);
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/* stop HC */
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le_writel(0, whc->base + WUSBINTR);
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whc_write_wusbcmd(whc, WUSBCMD_RUN, 0);
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whci_wait_for(&whc->umc->dev, whc->base + WUSBSTS,
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WUSBSTS_HCHALTED, WUSBSTS_HCHALTED,
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100, "HC to halt");
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wusb_cluster_id_put(wusbhc->cluster_id);
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mutex_unlock(&wusbhc->mutex);
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}
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static int whc_get_frame_number(struct usb_hcd *usb_hcd)
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{
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/* Frame numbers are not applicable to WUSB. */
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return -ENOSYS;
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}
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/*
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* Queue an URB to the ASL or PZL
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*/
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static int whc_urb_enqueue(struct usb_hcd *usb_hcd, struct urb *urb,
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gfp_t mem_flags)
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{
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struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
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struct whc *whc = wusbhc_to_whc(wusbhc);
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int ret;
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switch (usb_pipetype(urb->pipe)) {
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case PIPE_INTERRUPT:
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ret = pzl_urb_enqueue(whc, urb, mem_flags);
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break;
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case PIPE_ISOCHRONOUS:
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dev_err(&whc->umc->dev, "isochronous transfers unsupported\n");
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ret = -ENOTSUPP;
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break;
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case PIPE_CONTROL:
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case PIPE_BULK:
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default:
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ret = asl_urb_enqueue(whc, urb, mem_flags);
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break;
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}
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return ret;
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}
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/*
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* Remove a queued URB from the ASL or PZL.
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*/
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static int whc_urb_dequeue(struct usb_hcd *usb_hcd, struct urb *urb, int status)
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{
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struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
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struct whc *whc = wusbhc_to_whc(wusbhc);
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int ret;
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switch (usb_pipetype(urb->pipe)) {
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case PIPE_INTERRUPT:
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ret = pzl_urb_dequeue(whc, urb, status);
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break;
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case PIPE_ISOCHRONOUS:
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ret = -ENOTSUPP;
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break;
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case PIPE_CONTROL:
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case PIPE_BULK:
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default:
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ret = asl_urb_dequeue(whc, urb, status);
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break;
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}
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return ret;
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}
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/*
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* Wait for all URBs to the endpoint to be completed, then delete the
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* qset.
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*/
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static void whc_endpoint_disable(struct usb_hcd *usb_hcd,
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struct usb_host_endpoint *ep)
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{
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struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
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struct whc *whc = wusbhc_to_whc(wusbhc);
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struct whc_qset *qset;
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qset = ep->hcpriv;
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if (qset) {
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ep->hcpriv = NULL;
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if (usb_endpoint_xfer_bulk(&ep->desc)
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|| usb_endpoint_xfer_control(&ep->desc))
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asl_qset_delete(whc, qset);
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else
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pzl_qset_delete(whc, qset);
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}
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}
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static void whc_endpoint_reset(struct usb_hcd *usb_hcd,
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struct usb_host_endpoint *ep)
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{
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struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
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struct whc *whc = wusbhc_to_whc(wusbhc);
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struct whc_qset *qset;
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unsigned long flags;
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spin_lock_irqsave(&whc->lock, flags);
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qset = ep->hcpriv;
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if (qset) {
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qset->remove = 1;
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qset->reset = 1;
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if (usb_endpoint_xfer_bulk(&ep->desc)
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|| usb_endpoint_xfer_control(&ep->desc))
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queue_work(whc->workqueue, &whc->async_work);
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else
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queue_work(whc->workqueue, &whc->periodic_work);
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}
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spin_unlock_irqrestore(&whc->lock, flags);
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}
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static struct hc_driver whc_hc_driver = {
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.description = "whci-hcd",
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.product_desc = "Wireless host controller",
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.hcd_priv_size = sizeof(struct whc) - sizeof(struct usb_hcd),
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.irq = whc_int_handler,
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.flags = HCD_USB2,
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.reset = whc_reset,
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.start = whc_start,
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.stop = whc_stop,
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.get_frame_number = whc_get_frame_number,
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.urb_enqueue = whc_urb_enqueue,
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.urb_dequeue = whc_urb_dequeue,
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.endpoint_disable = whc_endpoint_disable,
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.endpoint_reset = whc_endpoint_reset,
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.hub_status_data = wusbhc_rh_status_data,
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.hub_control = wusbhc_rh_control,
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.start_port_reset = wusbhc_rh_start_port_reset,
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};
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static int whc_probe(struct umc_dev *umc)
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{
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int ret;
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struct usb_hcd *usb_hcd;
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struct wusbhc *wusbhc;
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struct whc *whc;
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struct device *dev = &umc->dev;
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usb_hcd = usb_create_hcd(&whc_hc_driver, dev, "whci");
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if (usb_hcd == NULL) {
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dev_err(dev, "unable to create hcd\n");
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return -ENOMEM;
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}
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usb_hcd->wireless = 1;
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usb_hcd->self.sg_tablesize = 2048; /* somewhat arbitrary */
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wusbhc = usb_hcd_to_wusbhc(usb_hcd);
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whc = wusbhc_to_whc(wusbhc);
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whc->umc = umc;
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ret = whc_init(whc);
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if (ret)
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goto error_whc_init;
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wusbhc->dev = dev;
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wusbhc->uwb_rc = uwb_rc_get_by_grandpa(umc->dev.parent);
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if (!wusbhc->uwb_rc) {
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ret = -ENODEV;
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dev_err(dev, "cannot get radio controller\n");
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goto error_uwb_rc;
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}
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if (whc->n_devices > USB_MAXCHILDREN) {
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dev_warn(dev, "USB_MAXCHILDREN too low for WUSB adapter (%u ports)\n",
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whc->n_devices);
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wusbhc->ports_max = USB_MAXCHILDREN;
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} else
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wusbhc->ports_max = whc->n_devices;
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wusbhc->mmcies_max = whc->n_mmc_ies;
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wusbhc->start = whc_wusbhc_start;
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wusbhc->stop = whc_wusbhc_stop;
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wusbhc->mmcie_add = whc_mmcie_add;
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wusbhc->mmcie_rm = whc_mmcie_rm;
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wusbhc->dev_info_set = whc_dev_info_set;
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wusbhc->bwa_set = whc_bwa_set;
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wusbhc->set_num_dnts = whc_set_num_dnts;
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wusbhc->set_ptk = whc_set_ptk;
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wusbhc->set_gtk = whc_set_gtk;
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ret = wusbhc_create(wusbhc);
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if (ret)
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goto error_wusbhc_create;
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ret = usb_add_hcd(usb_hcd, whc->umc->irq, IRQF_SHARED);
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if (ret) {
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dev_err(dev, "cannot add HCD: %d\n", ret);
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goto error_usb_add_hcd;
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}
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device_wakeup_enable(usb_hcd->self.controller);
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ret = wusbhc_b_create(wusbhc);
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if (ret) {
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dev_err(dev, "WUSBHC phase B setup failed: %d\n", ret);
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goto error_wusbhc_b_create;
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}
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whc_dbg_init(whc);
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return 0;
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error_wusbhc_b_create:
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usb_remove_hcd(usb_hcd);
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error_usb_add_hcd:
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wusbhc_destroy(wusbhc);
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error_wusbhc_create:
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uwb_rc_put(wusbhc->uwb_rc);
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error_uwb_rc:
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whc_clean_up(whc);
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error_whc_init:
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usb_put_hcd(usb_hcd);
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return ret;
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}
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static void whc_remove(struct umc_dev *umc)
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{
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struct usb_hcd *usb_hcd = dev_get_drvdata(&umc->dev);
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struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
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struct whc *whc = wusbhc_to_whc(wusbhc);
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if (usb_hcd) {
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whc_dbg_clean_up(whc);
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wusbhc_b_destroy(wusbhc);
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usb_remove_hcd(usb_hcd);
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wusbhc_destroy(wusbhc);
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uwb_rc_put(wusbhc->uwb_rc);
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whc_clean_up(whc);
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usb_put_hcd(usb_hcd);
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}
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}
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static struct umc_driver whci_hc_driver = {
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.name = "whci-hcd",
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.cap_id = UMC_CAP_ID_WHCI_WUSB_HC,
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.probe = whc_probe,
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.remove = whc_remove,
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};
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static int __init whci_hc_driver_init(void)
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{
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return umc_driver_register(&whci_hc_driver);
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}
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module_init(whci_hc_driver_init);
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static void __exit whci_hc_driver_exit(void)
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{
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umc_driver_unregister(&whci_hc_driver);
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}
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module_exit(whci_hc_driver_exit);
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/* PCI device ID's that we handle (so it gets loaded) */
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static struct pci_device_id __used whci_hcd_id_table[] = {
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{ PCI_DEVICE_CLASS(PCI_CLASS_WIRELESS_WHCI, ~0) },
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{ /* empty last entry */ }
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};
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MODULE_DEVICE_TABLE(pci, whci_hcd_id_table);
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MODULE_DESCRIPTION("WHCI Wireless USB host controller driver");
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MODULE_AUTHOR("Cambridge Silicon Radio Ltd.");
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MODULE_LICENSE("GPL");
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