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); if (sts & (WUSBSTS_INT | WUSBSTS_ERR_INT)) transfer_done(whc); return IRQ_HANDLED; }
/* * Start the wireless host controller. * * Start device notification. * * Put hc into run state, set DNTS parameters. */ static int whc_start(struct usb_hcd *usb_hcd) { struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd); struct whc *whc = wusbhc_to_whc(wusbhc); u8 bcid; int ret; mutex_lock(&wusbhc->mutex); le_writel(WUSBINTR_GEN_CMD_DONE | WUSBINTR_HOST_ERR | WUSBINTR_ASYNC_SCHED_SYNCED | WUSBINTR_DNTS_INT | WUSBINTR_ERR_INT | WUSBINTR_INT, whc->base + WUSBINTR); /* set cluster ID */ bcid = wusb_cluster_id_get(); ret = whc_set_cluster_id(whc, bcid); if (ret < 0) goto out; wusbhc->cluster_id = bcid; /* start HC */ whc_write_wusbcmd(whc, WUSBCMD_RUN, WUSBCMD_RUN); usb_hcd->uses_new_polling = 1; set_bit(HCD_FLAG_POLL_RH, &usb_hcd->flags); usb_hcd->state = HC_STATE_RUNNING; out: mutex_unlock(&wusbhc->mutex); return ret; }
int wusbhc_rh_start_port_reset(struct usb_hcd *usb_hcd, unsigned port_idx) { struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd); dev_err(wusbhc->dev, "%s (%p [%p], port_idx %u) UNIMPLEMENTED\n", __func__, usb_hcd, wusbhc, port_idx); WARN_ON(1); return -ENOSYS; }
int wusbhc_rh_resume(struct usb_hcd *usb_hcd) { struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd); dev_err(wusbhc->dev, "%s (%p [%p]) UNIMPLEMENTED\n", __func__, usb_hcd, wusbhc); /* dump_stack(); */ return -ENOSYS; }
static void whc_remove(struct umc_dev *umc) { struct usb_hcd *usb_hcd = dev_get_drvdata(&umc->dev); struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd); struct whc *whc = wusbhc_to_whc(wusbhc); if (usb_hcd) { whc_dbg_clean_up(whc); wusbhc_b_destroy(wusbhc); usb_remove_hcd(usb_hcd); wusbhc_destroy(wusbhc); uwb_rc_put(wusbhc->uwb_rc); whc_clean_up(whc); usb_put_hcd(usb_hcd); } }
/* * Return the hub change status bitmap * * The bits in the change status bitmap are cleared when a * ClearPortFeature request is issued (USB2.0[11.12.3,11.12.4]. * * @wusbhc is assumed referenced and @wusbhc->mutex unlocked. * * WARNING!! This gets called from atomic context; we cannot get the * mutex--the only race condition we can find is some bit * changing just after we copy it, which shouldn't be too * big of a problem [and we can't make it an spinlock * because other parts need to take it and sleep] . * * @usb_hcd is refcounted, so it won't disappear under us * and before killing a host, the polling of the root hub * would be stopped anyway. */ int wusbhc_rh_status_data(struct usb_hcd *usb_hcd, char *_buf) { struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd); size_t cnt, size; unsigned long *buf = (unsigned long *) _buf; /* WE DON'T LOCK, see comment */ size = wusbhc->ports_max + 1 /* hub bit */; size = (size + 8 - 1) / 8; /* round to bytes */ for (cnt = 0; cnt < wusbhc->ports_max; cnt++) if (wusb_port_by_idx(wusbhc, cnt)->change) set_bit(cnt + 1, buf); else clear_bit(cnt + 1, buf); return size; }
/* * Wait for all URBs to the endpoint to be completed, then delete the * qset. */ static void whc_endpoint_disable(struct usb_hcd *usb_hcd, struct usb_host_endpoint *ep) { struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd); struct whc *whc = wusbhc_to_whc(wusbhc); struct whc_qset *qset; qset = ep->hcpriv; if (qset) { ep->hcpriv = NULL; if (usb_endpoint_xfer_bulk(&ep->desc) || usb_endpoint_xfer_control(&ep->desc)) asl_qset_delete(whc, qset); else pzl_qset_delete(whc, qset); } }
/* * Stop the wireless host controller. * * Stop device notification. * * Wait for pending transfer to stop? Put hc into stop state? */ static void whc_stop(struct usb_hcd *usb_hcd) { struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd); struct whc *whc = wusbhc_to_whc(wusbhc); mutex_lock(&wusbhc->mutex); /* stop HC */ le_writel(0, whc->base + WUSBINTR); whc_write_wusbcmd(whc, WUSBCMD_RUN, 0); whci_wait_for(&whc->umc->dev, whc->base + WUSBSTS, WUSBSTS_HCHALTED, WUSBSTS_HCHALTED, 100, "HC to halt"); wusb_cluster_id_put(wusbhc->cluster_id); mutex_unlock(&wusbhc->mutex); }
/* * Entry point for Root Hub operations * * @wusbhc is assumed referenced and @wusbhc->mutex unlocked. */ int wusbhc_rh_control(struct usb_hcd *usb_hcd, u16 reqntype, u16 wValue, u16 wIndex, char *buf, u16 wLength) { int result = -ENOSYS; struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd); switch (reqntype) { case GetHubDescriptor: result = wusbhc_rh_get_hub_descr( wusbhc, wValue, wIndex, (struct usb_hub_descriptor *) buf, wLength); break; case ClearHubFeature: result = wusbhc_rh_clear_hub_feat(wusbhc, wValue); break; case GetHubStatus: result = wusbhc_rh_get_hub_status(wusbhc, (u32 *)buf, wLength); break; case SetPortFeature: result = wusbhc_rh_set_port_feat(wusbhc, wValue, wIndex >> 8, (wIndex & 0xff) - 1); break; case ClearPortFeature: result = wusbhc_rh_clear_port_feat(wusbhc, wValue, wIndex >> 8, (wIndex & 0xff) - 1); break; case GetPortStatus: result = wusbhc_rh_get_port_status(wusbhc, wIndex - 1, (u32 *)buf, wLength); break; case SetHubFeature: default: dev_err(wusbhc->dev, "%s (%p [%p], %x, %x, %x, %p, %x) " "UNIMPLEMENTED\n", __func__, usb_hcd, wusbhc, reqntype, wValue, wIndex, buf, wLength); /* dump_stack(); */ result = -ENOSYS; } return result; }
/* * Remove a queued URB from the ASL or PZL. */ static int whc_urb_dequeue(struct usb_hcd *usb_hcd, struct urb *urb, int status) { struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd); struct whc *whc = wusbhc_to_whc(wusbhc); int ret; switch (usb_pipetype(urb->pipe)) { case PIPE_INTERRUPT: ret = pzl_urb_dequeue(whc, urb, status); break; case PIPE_ISOCHRONOUS: ret = -ENOTSUPP; break; case PIPE_CONTROL: case PIPE_BULK: default: ret = asl_urb_dequeue(whc, urb, status); break; }; return ret; }
static void whc_endpoint_reset(struct usb_hcd *usb_hcd, struct usb_host_endpoint *ep) { struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd); struct whc *whc = wusbhc_to_whc(wusbhc); struct whc_qset *qset; unsigned long flags; spin_lock_irqsave(&whc->lock, flags); qset = ep->hcpriv; if (qset) { qset->remove = 1; qset->reset = 1; if (usb_endpoint_xfer_bulk(&ep->desc) || usb_endpoint_xfer_control(&ep->desc)) queue_work(whc->workqueue, &whc->async_work); else queue_work(whc->workqueue, &whc->periodic_work); } spin_unlock_irqrestore(&whc->lock, flags); }
/* * Queue an URB to the ASL or PZL */ static int whc_urb_enqueue(struct usb_hcd *usb_hcd, struct urb *urb, gfp_t mem_flags) { struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd); struct whc *whc = wusbhc_to_whc(wusbhc); int ret; switch (usb_pipetype(urb->pipe)) { case PIPE_INTERRUPT: ret = pzl_urb_enqueue(whc, urb, mem_flags); break; case PIPE_ISOCHRONOUS: dev_err(&whc->umc->dev, "isochronous transfers unsupported\n"); ret = -ENOTSUPP; break; case PIPE_CONTROL: case PIPE_BULK: default: ret = asl_urb_enqueue(whc, urb, mem_flags); break; }; return ret; }
/* * Return the hub change status bitmap * * The bits in the change status bitmap are cleared when a * ClearPortFeature request is issued (USB2.0[11.12.3,11.12.4]. * * @wusbhc is assumed referenced and @wusbhc->mutex unlocked. * * WARNING!! This gets called from atomic context; we cannot get the * mutex--the only race condition we can find is some bit * changing just after we copy it, which shouldn't be too * big of a problem [and we can't make it an spinlock * because other parts need to take it and sleep] . * * @usb_hcd is refcounted, so it won't disappear under us * and before killing a host, the polling of the root hub * would be stopped anyway. */ int wusbhc_rh_status_data(struct usb_hcd *usb_hcd, char *_buf) { struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd); size_t cnt, size, bits_set = 0; /* WE DON'T LOCK, see comment */ /* round up to bytes. Hub bit is bit 0 so add 1. */ size = DIV_ROUND_UP(wusbhc->ports_max + 1, 8); /* clear the output buffer. */ memset(_buf, 0, size); /* set the bit for each changed port. */ for (cnt = 0; cnt < wusbhc->ports_max; cnt++) { if (wusb_port_by_idx(wusbhc, cnt)->change) { const int bitpos = cnt+1; _buf[bitpos/8] |= (1 << (bitpos % 8)); bits_set++; } } return bits_set ? size : 0; }
/** * Extract the wusbhc that corresponds to a USB Host Controller class device * * WARNING! Apply only if @dev is that of a * wusbhc.usb_hcd.self->class_dev; otherwise, you loose. */ static struct wusbhc *usbhc_dev_to_wusbhc(struct device *dev) { struct usb_bus *usb_bus = dev_get_drvdata(dev); struct usb_hcd *usb_hcd = bus_to_hcd(usb_bus); return usb_hcd_to_wusbhc(usb_hcd); }
static int whc_probe(struct umc_dev *umc) { int ret = -ENOMEM; struct usb_hcd *usb_hcd; struct wusbhc *wusbhc = NULL; struct whc *whc = NULL; struct device *dev = &umc->dev; usb_hcd = usb_create_hcd(&whc_hc_driver, dev, "whci"); if (usb_hcd == NULL) { dev_err(dev, "unable to create hcd\n"); goto error; } usb_hcd->wireless = 1; usb_hcd->self.sg_tablesize = 2048; /* somewhat arbitrary */ wusbhc = usb_hcd_to_wusbhc(usb_hcd); whc = wusbhc_to_whc(wusbhc); whc->umc = umc; ret = whc_init(whc); if (ret) goto error; wusbhc->dev = dev; wusbhc->uwb_rc = uwb_rc_get_by_grandpa(umc->dev.parent); if (!wusbhc->uwb_rc) { ret = -ENODEV; dev_err(dev, "cannot get radio controller\n"); goto error; } if (whc->n_devices > USB_MAXCHILDREN) { dev_warn(dev, "USB_MAXCHILDREN too low for WUSB adapter (%u ports)\n", whc->n_devices); wusbhc->ports_max = USB_MAXCHILDREN; } else wusbhc->ports_max = whc->n_devices; wusbhc->mmcies_max = whc->n_mmc_ies; wusbhc->start = whc_wusbhc_start; wusbhc->stop = whc_wusbhc_stop; wusbhc->mmcie_add = whc_mmcie_add; wusbhc->mmcie_rm = whc_mmcie_rm; wusbhc->dev_info_set = whc_dev_info_set; wusbhc->bwa_set = whc_bwa_set; wusbhc->set_num_dnts = whc_set_num_dnts; wusbhc->set_ptk = whc_set_ptk; wusbhc->set_gtk = whc_set_gtk; ret = wusbhc_create(wusbhc); if (ret) goto error_wusbhc_create; ret = usb_add_hcd(usb_hcd, whc->umc->irq, IRQF_SHARED); if (ret) { dev_err(dev, "cannot add HCD: %d\n", ret); goto error_usb_add_hcd; } ret = wusbhc_b_create(wusbhc); if (ret) { dev_err(dev, "WUSBHC phase B setup failed: %d\n", ret); goto error_wusbhc_b_create; } whc_dbg_init(whc); return 0; error_wusbhc_b_create: usb_remove_hcd(usb_hcd); error_usb_add_hcd: wusbhc_destroy(wusbhc); error_wusbhc_create: uwb_rc_put(wusbhc->uwb_rc); error: whc_clean_up(whc); if (usb_hcd) usb_put_hcd(usb_hcd); return ret; }