| David Vrabel | 7e6133a | 2008-09-17 16:34:28 +0100 | [diff] [blame^] | 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/version.h> |
| 19 | #include <linux/kernel.h> |
| 20 | #include <linux/init.h> |
| 21 | #include <linux/uwb/umc.h> |
| 22 | |
| 23 | #include "../../wusbcore/wusbhc.h" |
| 24 | |
| 25 | #include "whcd.h" |
| 26 | |
| 27 | static void transfer_done(struct whc *whc) |
| 28 | { |
| 29 | queue_work(whc->workqueue, &whc->async_work); |
| 30 | queue_work(whc->workqueue, &whc->periodic_work); |
| 31 | } |
| 32 | |
| 33 | irqreturn_t whc_int_handler(struct usb_hcd *hcd) |
| 34 | { |
| 35 | struct wusbhc *wusbhc = usb_hcd_to_wusbhc(hcd); |
| 36 | struct whc *whc = wusbhc_to_whc(wusbhc); |
| 37 | u32 sts; |
| 38 | |
| 39 | sts = le_readl(whc->base + WUSBSTS); |
| 40 | if (!(sts & WUSBSTS_INT_MASK)) |
| 41 | return IRQ_NONE; |
| 42 | le_writel(sts & WUSBSTS_INT_MASK, whc->base + WUSBSTS); |
| 43 | |
| 44 | if (sts & WUSBSTS_GEN_CMD_DONE) |
| 45 | wake_up(&whc->cmd_wq); |
| 46 | |
| 47 | if (sts & WUSBSTS_HOST_ERR) |
| 48 | dev_err(&whc->umc->dev, "FIXME: host system error\n"); |
| 49 | |
| 50 | if (sts & WUSBSTS_ASYNC_SCHED_SYNCED) |
| 51 | wake_up(&whc->async_list_wq); |
| 52 | |
| 53 | if (sts & WUSBSTS_PERIODIC_SCHED_SYNCED) |
| 54 | wake_up(&whc->periodic_list_wq); |
| 55 | |
| 56 | if (sts & WUSBSTS_DNTS_INT) |
| 57 | queue_work(whc->workqueue, &whc->dn_work); |
| 58 | |
| 59 | /* |
| 60 | * A transfer completed (see [WHCI] section 4.7.1.2 for when |
| 61 | * this occurs). |
| 62 | */ |
| 63 | if (sts & (WUSBSTS_INT | WUSBSTS_ERR_INT)) |
| 64 | transfer_done(whc); |
| 65 | |
| 66 | return IRQ_HANDLED; |
| 67 | } |
| 68 | |
| 69 | static int process_dn_buf(struct whc *whc) |
| 70 | { |
| 71 | struct wusbhc *wusbhc = &whc->wusbhc; |
| 72 | struct dn_buf_entry *dn; |
| 73 | int processed = 0; |
| 74 | |
| 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, |
| 79 | dn->msg_size); |
| 80 | dn->status &= ~WHC_DN_STATUS_VALID; |
| 81 | processed++; |
| 82 | } |
| 83 | } |
| 84 | return processed; |
| 85 | } |
| 86 | |
| 87 | void whc_dn_work(struct work_struct *work) |
| 88 | { |
| 89 | struct whc *whc = container_of(work, struct whc, dn_work); |
| 90 | int processed; |
| 91 | |
| 92 | do { |
| 93 | processed = process_dn_buf(whc); |
| 94 | } while (processed); |
| 95 | } |