wusb: remove unused #include <version.h>
[linux-2.6.git] / drivers / usb / host / whci / int.c
1 /*
2  * Wireless Host Controller (WHC) interrupt handling.
3  *
4  * Copyright (C) 2007 Cambridge Silicon Radio Ltd.
5  *
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.
9  *
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.
14  *
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/>.
17  */
18 #include <linux/kernel.h>
19 #include <linux/init.h>
20 #include <linux/uwb/umc.h>
21
22 #include "../../wusbcore/wusbhc.h"
23
24 #include "whcd.h"
25
26 static void transfer_done(struct whc *whc)
27 {
28         queue_work(whc->workqueue, &whc->async_work);
29         queue_work(whc->workqueue, &whc->periodic_work);
30 }
31
32 irqreturn_t whc_int_handler(struct usb_hcd *hcd)
33 {
34         struct wusbhc *wusbhc = usb_hcd_to_wusbhc(hcd);
35         struct whc *whc = wusbhc_to_whc(wusbhc);
36         u32 sts;
37
38         sts = le_readl(whc->base + WUSBSTS);
39         if (!(sts & WUSBSTS_INT_MASK))
40                 return IRQ_NONE;
41         le_writel(sts & WUSBSTS_INT_MASK, whc->base + WUSBSTS);
42
43         if (sts & WUSBSTS_GEN_CMD_DONE)
44                 wake_up(&whc->cmd_wq);
45
46         if (sts & WUSBSTS_HOST_ERR)
47                 dev_err(&whc->umc->dev, "FIXME: host system error\n");
48
49         if (sts & WUSBSTS_ASYNC_SCHED_SYNCED)
50                 wake_up(&whc->async_list_wq);
51
52         if (sts & WUSBSTS_PERIODIC_SCHED_SYNCED)
53                 wake_up(&whc->periodic_list_wq);
54
55         if (sts & WUSBSTS_DNTS_INT)
56                 queue_work(whc->workqueue, &whc->dn_work);
57
58         /*
59          * A transfer completed (see [WHCI] section 4.7.1.2 for when
60          * this occurs).
61          */
62         if (sts & (WUSBSTS_INT | WUSBSTS_ERR_INT))
63                 transfer_done(whc);
64
65         return IRQ_HANDLED;
66 }
67
68 static int process_dn_buf(struct whc *whc)
69 {
70         struct wusbhc *wusbhc = &whc->wusbhc;
71         struct dn_buf_entry *dn;
72         int processed = 0;
73
74         for (dn = whc->dn_buf; dn < whc->dn_buf + WHC_N_DN_ENTRIES; dn++) {
75                 if (dn->status & WHC_DN_STATUS_VALID) {
76                         wusbhc_handle_dn(wusbhc, dn->src_addr,
77                                          (struct wusb_dn_hdr *)dn->dn_data,
78                                          dn->msg_size);
79                         dn->status &= ~WHC_DN_STATUS_VALID;
80                         processed++;
81                 }
82         }
83         return processed;
84 }
85
86 void whc_dn_work(struct work_struct *work)
87 {
88         struct whc *whc = container_of(work, struct whc, dn_work);
89         int processed;
90
91         do {
92                 processed = process_dn_buf(whc);
93         } while (processed);
94 }