/* * Wireless Host Controller (WHC) interrupt handling. * * Copyright (C) 2007 Cambridge Silicon Radio Ltd. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License version * 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include <linux/kernel.h> #include <linux/init.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); }