2 * Wireless Host Controller (WHC) interrupt handling.
4 * Copyright (C) 2007 Cambridge Silicon Radio Ltd.
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License version
8 * 2 as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 #include <linux/version.h>
19 #include <linux/kernel.h>
20 #include <linux/init.h>
21 #include <linux/uwb/umc.h>
23 #include "../../wusbcore/wusbhc.h"
27 static void transfer_done(struct whc
*whc
)
29 queue_work(whc
->workqueue
, &whc
->async_work
);
30 queue_work(whc
->workqueue
, &whc
->periodic_work
);
33 irqreturn_t
whc_int_handler(struct usb_hcd
*hcd
)
35 struct wusbhc
*wusbhc
= usb_hcd_to_wusbhc(hcd
);
36 struct whc
*whc
= wusbhc_to_whc(wusbhc
);
39 sts
= le_readl(whc
->base
+ WUSBSTS
);
40 if (!(sts
& WUSBSTS_INT_MASK
))
42 le_writel(sts
& WUSBSTS_INT_MASK
, whc
->base
+ WUSBSTS
);
44 if (sts
& WUSBSTS_GEN_CMD_DONE
)
45 wake_up(&whc
->cmd_wq
);
47 if (sts
& WUSBSTS_HOST_ERR
)
48 dev_err(&whc
->umc
->dev
, "FIXME: host system error\n");
50 if (sts
& WUSBSTS_ASYNC_SCHED_SYNCED
)
51 wake_up(&whc
->async_list_wq
);
53 if (sts
& WUSBSTS_PERIODIC_SCHED_SYNCED
)
54 wake_up(&whc
->periodic_list_wq
);
56 if (sts
& WUSBSTS_DNTS_INT
)
57 queue_work(whc
->workqueue
, &whc
->dn_work
);
60 * A transfer completed (see [WHCI] section 4.7.1.2 for when
63 if (sts
& (WUSBSTS_INT
| WUSBSTS_ERR_INT
))
69 static int process_dn_buf(struct whc
*whc
)
71 struct wusbhc
*wusbhc
= &whc
->wusbhc
;
72 struct dn_buf_entry
*dn
;
75 for (dn
= whc
->dn_buf
; dn
< whc
->dn_buf
+ WHC_N_DN_ENTRIES
; dn
++) {
76 if (dn
->status
& WHC_DN_STATUS_VALID
) {
77 wusbhc_handle_dn(wusbhc
, dn
->src_addr
,
78 (struct wusb_dn_hdr
*)dn
->dn_data
,
80 dn
->status
&= ~WHC_DN_STATUS_VALID
;
87 void whc_dn_work(struct work_struct
*work
)
89 struct whc
*whc
= container_of(work
, struct whc
, dn_work
);
93 processed
= process_dn_buf(whc
);