95 lines
2.4 KiB
C
95 lines
2.4 KiB
C
/*
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* Wireless Host Controller (WHC) interrupt handling.
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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/uwb/umc.h>
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#include "../../wusbcore/wusbhc.h"
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#include "whcd.h"
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static void transfer_done(struct whc *whc)
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{
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queue_work(whc->workqueue, &whc->async_work);
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queue_work(whc->workqueue, &whc->periodic_work);
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}
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irqreturn_t whc_int_handler(struct usb_hcd *hcd)
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{
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struct wusbhc *wusbhc = usb_hcd_to_wusbhc(hcd);
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struct whc *whc = wusbhc_to_whc(wusbhc);
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u32 sts;
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sts = le_readl(whc->base + WUSBSTS);
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if (!(sts & WUSBSTS_INT_MASK))
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return IRQ_NONE;
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le_writel(sts & WUSBSTS_INT_MASK, whc->base + WUSBSTS);
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if (sts & WUSBSTS_GEN_CMD_DONE)
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wake_up(&whc->cmd_wq);
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if (sts & WUSBSTS_HOST_ERR)
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dev_err(&whc->umc->dev, "FIXME: host system error\n");
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if (sts & WUSBSTS_ASYNC_SCHED_SYNCED)
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wake_up(&whc->async_list_wq);
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if (sts & WUSBSTS_PERIODIC_SCHED_SYNCED)
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wake_up(&whc->periodic_list_wq);
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if (sts & WUSBSTS_DNTS_INT)
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queue_work(whc->workqueue, &whc->dn_work);
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/*
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* A transfer completed (see [WHCI] section 4.7.1.2 for when
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* this occurs).
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*/
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if (sts & (WUSBSTS_INT | WUSBSTS_ERR_INT))
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transfer_done(whc);
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return IRQ_HANDLED;
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}
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static int process_dn_buf(struct whc *whc)
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{
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struct wusbhc *wusbhc = &whc->wusbhc;
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struct dn_buf_entry *dn;
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int processed = 0;
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for (dn = whc->dn_buf; dn < whc->dn_buf + WHC_N_DN_ENTRIES; dn++) {
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if (dn->status & WHC_DN_STATUS_VALID) {
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wusbhc_handle_dn(wusbhc, dn->src_addr,
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(struct wusb_dn_hdr *)dn->dn_data,
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dn->msg_size);
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dn->status &= ~WHC_DN_STATUS_VALID;
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processed++;
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}
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}
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return processed;
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}
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void whc_dn_work(struct work_struct *work)
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{
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struct whc *whc = container_of(work, struct whc, dn_work);
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int processed;
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do {
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processed = process_dn_buf(whc);
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} while (processed);
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}
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