// SPDX-License-Identifier: GPL-2.0
|
/*
|
* Wireless Host Controller (WHC) interrupt handling.
|
*
|
* Copyright (C) 2007 Cambridge Silicon Radio Ltd.
|
*/
|
#include <linux/kernel.h>
|
#include <linux/uwb/umc.h>
|
|
#include "../../wusbcore/wusbhc.h"
|
|
#include "whcd.h"
|
|
static void transfer_done(struct whc *whc)
|
{
|
queue_work(whc->workqueue, &whc->async_work);
|
queue_work(whc->workqueue, &whc->periodic_work);
|
}
|
|
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);
|
|
/*
|
* A transfer completed (see [WHCI] section 4.7.1.2 for when
|
* this occurs).
|
*/
|
if (sts & (WUSBSTS_INT | WUSBSTS_ERR_INT))
|
transfer_done(whc);
|
|
return IRQ_HANDLED;
|
}
|
|
static int process_dn_buf(struct whc *whc)
|
{
|
struct wusbhc *wusbhc = &whc->wusbhc;
|
struct dn_buf_entry *dn;
|
int processed = 0;
|
|
for (dn = whc->dn_buf; dn < whc->dn_buf + WHC_N_DN_ENTRIES; dn++) {
|
if (dn->status & WHC_DN_STATUS_VALID) {
|
wusbhc_handle_dn(wusbhc, dn->src_addr,
|
(struct wusb_dn_hdr *)dn->dn_data,
|
dn->msg_size);
|
dn->status &= ~WHC_DN_STATUS_VALID;
|
processed++;
|
}
|
}
|
return processed;
|
}
|
|
void whc_dn_work(struct work_struct *work)
|
{
|
struct whc *whc = container_of(work, struct whc, dn_work);
|
int processed;
|
|
do {
|
processed = process_dn_buf(whc);
|
} while (processed);
|
}
|
