| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * mtu3_gadget.c - MediaTek usb3 DRD peripheral support |
| * |
| * Copyright (C) 2016 MediaTek Inc. |
| * |
| * Author: Chunfeng Yun <chunfeng.yun@mediatek.com> |
| */ |
| |
| #include "mtu3.h" |
| |
| void mtu3_req_complete(struct mtu3_ep *mep, |
| struct usb_request *req, int status) |
| __releases(mep->mtu->lock) |
| __acquires(mep->mtu->lock) |
| { |
| struct mtu3_request *mreq; |
| struct mtu3 *mtu; |
| int busy = mep->busy; |
| |
| mreq = to_mtu3_request(req); |
| list_del(&mreq->list); |
| if (mreq->request.status == -EINPROGRESS) |
| mreq->request.status = status; |
| |
| mtu = mreq->mtu; |
| mep->busy = 1; |
| spin_unlock(&mtu->lock); |
| |
| /* ep0 makes use of PIO, needn't unmap it */ |
| if (mep->epnum) |
| usb_gadget_unmap_request(&mtu->g, req, mep->is_in); |
| |
| dev_dbg(mtu->dev, "%s complete req: %p, sts %d, %d/%d\n", mep->name, |
| req, req->status, mreq->request.actual, mreq->request.length); |
| |
| usb_gadget_giveback_request(&mep->ep, &mreq->request); |
| |
| spin_lock(&mtu->lock); |
| mep->busy = busy; |
| } |
| |
| static void nuke(struct mtu3_ep *mep, const int status) |
| { |
| struct mtu3_request *mreq = NULL; |
| |
| mep->busy = 1; |
| if (list_empty(&mep->req_list)) |
| return; |
| |
| dev_dbg(mep->mtu->dev, "abort %s's req: sts %d\n", mep->name, status); |
| |
| /* exclude EP0 */ |
| if (mep->epnum) |
| mtu3_qmu_flush(mep); |
| |
| while (!list_empty(&mep->req_list)) { |
| mreq = list_first_entry(&mep->req_list, |
| struct mtu3_request, list); |
| mtu3_req_complete(mep, &mreq->request, status); |
| } |
| } |
| |
| static int mtu3_ep_enable(struct mtu3_ep *mep) |
| { |
| const struct usb_endpoint_descriptor *desc; |
| const struct usb_ss_ep_comp_descriptor *comp_desc; |
| struct mtu3 *mtu = mep->mtu; |
| u32 interval = 0; |
| u32 mult = 0; |
| u32 burst = 0; |
| int ret; |
| |
| desc = mep->desc; |
| comp_desc = mep->comp_desc; |
| mep->type = usb_endpoint_type(desc); |
| mep->maxp = usb_endpoint_maxp(desc); |
| |
| switch (mtu->g.speed) { |
| case USB_SPEED_SUPER: |
| case USB_SPEED_SUPER_PLUS: |
| if (usb_endpoint_xfer_int(desc) || |
| usb_endpoint_xfer_isoc(desc)) { |
| interval = desc->bInterval; |
| interval = clamp_val(interval, 1, 16); |
| if (usb_endpoint_xfer_isoc(desc) && comp_desc) |
| mult = comp_desc->bmAttributes; |
| } |
| if (comp_desc) |
| burst = comp_desc->bMaxBurst; |
| |
| break; |
| case USB_SPEED_HIGH: |
| if (usb_endpoint_xfer_isoc(desc) || |
| usb_endpoint_xfer_int(desc)) { |
| interval = desc->bInterval; |
| interval = clamp_val(interval, 1, 16); |
| mult = usb_endpoint_maxp_mult(desc) - 1; |
| } |
| break; |
| case USB_SPEED_FULL: |
| if (usb_endpoint_xfer_isoc(desc)) |
| interval = clamp_val(desc->bInterval, 1, 16); |
| else if (usb_endpoint_xfer_int(desc)) |
| interval = clamp_val(desc->bInterval, 1, 255); |
| |
| break; |
| default: |
| break; /*others are ignored */ |
| } |
| |
| dev_dbg(mtu->dev, "%s maxp:%d, interval:%d, burst:%d, mult:%d\n", |
| __func__, mep->maxp, interval, burst, mult); |
| |
| mep->ep.maxpacket = mep->maxp; |
| mep->ep.desc = desc; |
| mep->ep.comp_desc = comp_desc; |
| |
| /* slot mainly affects bulk/isoc transfer, so ignore int */ |
| mep->slot = usb_endpoint_xfer_int(desc) ? 0 : mtu->slot; |
| |
| ret = mtu3_config_ep(mtu, mep, interval, burst, mult); |
| if (ret < 0) |
| return ret; |
| |
| ret = mtu3_gpd_ring_alloc(mep); |
| if (ret < 0) { |
| mtu3_deconfig_ep(mtu, mep); |
| return ret; |
| } |
| |
| mtu3_qmu_start(mep); |
| |
| return 0; |
| } |
| |
| static int mtu3_ep_disable(struct mtu3_ep *mep) |
| { |
| struct mtu3 *mtu = mep->mtu; |
| |
| mtu3_qmu_stop(mep); |
| |
| /* abort all pending requests */ |
| nuke(mep, -ESHUTDOWN); |
| mtu3_deconfig_ep(mtu, mep); |
| mtu3_gpd_ring_free(mep); |
| |
| mep->desc = NULL; |
| mep->ep.desc = NULL; |
| mep->comp_desc = NULL; |
| mep->type = 0; |
| mep->flags = 0; |
| |
| return 0; |
| } |
| |
| static int mtu3_gadget_ep_enable(struct usb_ep *ep, |
| const struct usb_endpoint_descriptor *desc) |
| { |
| struct mtu3_ep *mep; |
| struct mtu3 *mtu; |
| unsigned long flags; |
| int ret = -EINVAL; |
| |
| if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) { |
| pr_debug("%s invalid parameters\n", __func__); |
| return -EINVAL; |
| } |
| |
| if (!desc->wMaxPacketSize) { |
| pr_debug("%s missing wMaxPacketSize\n", __func__); |
| return -EINVAL; |
| } |
| mep = to_mtu3_ep(ep); |
| mtu = mep->mtu; |
| |
| /* check ep number and direction against endpoint */ |
| if (usb_endpoint_num(desc) != mep->epnum) |
| return -EINVAL; |
| |
| if (!!usb_endpoint_dir_in(desc) ^ !!mep->is_in) |
| return -EINVAL; |
| |
| dev_dbg(mtu->dev, "%s %s\n", __func__, ep->name); |
| |
| if (mep->flags & MTU3_EP_ENABLED) { |
| dev_WARN_ONCE(mtu->dev, true, "%s is already enabled\n", |
| mep->name); |
| return 0; |
| } |
| |
| spin_lock_irqsave(&mtu->lock, flags); |
| mep->desc = desc; |
| mep->comp_desc = ep->comp_desc; |
| |
| ret = mtu3_ep_enable(mep); |
| if (ret) |
| goto error; |
| |
| mep->busy = 0; |
| mep->wedged = 0; |
| mep->flags |= MTU3_EP_ENABLED; |
| mtu->active_ep++; |
| |
| error: |
| spin_unlock_irqrestore(&mtu->lock, flags); |
| |
| dev_dbg(mtu->dev, "%s active_ep=%d\n", __func__, mtu->active_ep); |
| |
| return ret; |
| } |
| |
| static int mtu3_gadget_ep_disable(struct usb_ep *ep) |
| { |
| struct mtu3_ep *mep = to_mtu3_ep(ep); |
| struct mtu3 *mtu = mep->mtu; |
| unsigned long flags; |
| |
| dev_dbg(mtu->dev, "%s %s\n", __func__, mep->name); |
| |
| if (!(mep->flags & MTU3_EP_ENABLED)) { |
| dev_warn(mtu->dev, "%s is already disabled\n", mep->name); |
| return 0; |
| } |
| |
| spin_lock_irqsave(&mtu->lock, flags); |
| mtu3_ep_disable(mep); |
| mep->flags &= ~MTU3_EP_ENABLED; |
| mtu->active_ep--; |
| spin_unlock_irqrestore(&(mtu->lock), flags); |
| |
| dev_dbg(mtu->dev, "%s active_ep=%d, mtu3 is_active=%d\n", |
| __func__, mtu->active_ep, mtu->is_active); |
| |
| return 0; |
| } |
| |
| struct usb_request *mtu3_alloc_request(struct usb_ep *ep, gfp_t gfp_flags) |
| { |
| struct mtu3_ep *mep = to_mtu3_ep(ep); |
| struct mtu3_request *mreq; |
| |
| mreq = kzalloc(sizeof(*mreq), gfp_flags); |
| if (!mreq) |
| return NULL; |
| |
| mreq->request.dma = DMA_ADDR_INVALID; |
| mreq->epnum = mep->epnum; |
| mreq->mep = mep; |
| |
| return &mreq->request; |
| } |
| |
| void mtu3_free_request(struct usb_ep *ep, struct usb_request *req) |
| { |
| kfree(to_mtu3_request(req)); |
| } |
| |
| static int mtu3_gadget_queue(struct usb_ep *ep, |
| struct usb_request *req, gfp_t gfp_flags) |
| { |
| struct mtu3_ep *mep; |
| struct mtu3_request *mreq; |
| struct mtu3 *mtu; |
| unsigned long flags; |
| int ret = 0; |
| |
| if (!ep || !req) |
| return -EINVAL; |
| |
| if (!req->buf) |
| return -ENODATA; |
| |
| mep = to_mtu3_ep(ep); |
| mtu = mep->mtu; |
| mreq = to_mtu3_request(req); |
| mreq->mtu = mtu; |
| |
| if (mreq->mep != mep) |
| return -EINVAL; |
| |
| dev_dbg(mtu->dev, "%s %s EP%d(%s), req=%p, maxp=%d, len#%d\n", |
| __func__, mep->is_in ? "TX" : "RX", mreq->epnum, ep->name, |
| mreq, ep->maxpacket, mreq->request.length); |
| |
| if (req->length > GPD_BUF_SIZE) { |
| dev_warn(mtu->dev, |
| "req length > supported MAX:%d requested:%d\n", |
| GPD_BUF_SIZE, req->length); |
| return -EOPNOTSUPP; |
| } |
| |
| /* don't queue if the ep is down */ |
| if (!mep->desc) { |
| dev_dbg(mtu->dev, "req=%p queued to %s while it's disabled\n", |
| req, ep->name); |
| return -ESHUTDOWN; |
| } |
| |
| mreq->request.actual = 0; |
| mreq->request.status = -EINPROGRESS; |
| |
| ret = usb_gadget_map_request(&mtu->g, req, mep->is_in); |
| if (ret) { |
| dev_err(mtu->dev, "dma mapping failed\n"); |
| return ret; |
| } |
| |
| spin_lock_irqsave(&mtu->lock, flags); |
| |
| if (mtu3_prepare_transfer(mep)) { |
| ret = -EAGAIN; |
| goto error; |
| } |
| |
| list_add_tail(&mreq->list, &mep->req_list); |
| mtu3_insert_gpd(mep, mreq); |
| mtu3_qmu_resume(mep); |
| |
| error: |
| spin_unlock_irqrestore(&mtu->lock, flags); |
| |
| return ret; |
| } |
| |
| static int mtu3_gadget_dequeue(struct usb_ep *ep, struct usb_request *req) |
| { |
| struct mtu3_ep *mep = to_mtu3_ep(ep); |
| struct mtu3_request *mreq = to_mtu3_request(req); |
| struct mtu3_request *r; |
| unsigned long flags; |
| int ret = 0; |
| struct mtu3 *mtu = mep->mtu; |
| |
| if (!ep || !req || mreq->mep != mep) |
| return -EINVAL; |
| |
| dev_dbg(mtu->dev, "%s : req=%p\n", __func__, req); |
| |
| spin_lock_irqsave(&mtu->lock, flags); |
| |
| list_for_each_entry(r, &mep->req_list, list) { |
| if (r == mreq) |
| break; |
| } |
| if (r != mreq) { |
| dev_dbg(mtu->dev, "req=%p not queued to %s\n", req, ep->name); |
| ret = -EINVAL; |
| goto done; |
| } |
| |
| mtu3_qmu_flush(mep); /* REVISIT: set BPS ?? */ |
| mtu3_req_complete(mep, req, -ECONNRESET); |
| mtu3_qmu_start(mep); |
| |
| done: |
| spin_unlock_irqrestore(&mtu->lock, flags); |
| |
| return ret; |
| } |
| |
| /* |
| * Set or clear the halt bit of an EP. |
| * A halted EP won't TX/RX any data but will queue requests. |
| */ |
| static int mtu3_gadget_ep_set_halt(struct usb_ep *ep, int value) |
| { |
| struct mtu3_ep *mep = to_mtu3_ep(ep); |
| struct mtu3 *mtu = mep->mtu; |
| struct mtu3_request *mreq; |
| unsigned long flags; |
| int ret = 0; |
| |
| if (!ep) |
| return -EINVAL; |
| |
| dev_dbg(mtu->dev, "%s : %s...", __func__, ep->name); |
| |
| spin_lock_irqsave(&mtu->lock, flags); |
| |
| if (mep->type == USB_ENDPOINT_XFER_ISOC) { |
| ret = -EINVAL; |
| goto done; |
| } |
| |
| mreq = next_request(mep); |
| if (value) { |
| /* |
| * If there is not request for TX-EP, QMU will not transfer |
| * data to TX-FIFO, so no need check whether TX-FIFO |
| * holds bytes or not here |
| */ |
| if (mreq) { |
| dev_dbg(mtu->dev, "req in progress, cannot halt %s\n", |
| ep->name); |
| ret = -EAGAIN; |
| goto done; |
| } |
| } else { |
| mep->wedged = 0; |
| } |
| |
| dev_dbg(mtu->dev, "%s %s stall\n", ep->name, value ? "set" : "clear"); |
| |
| mtu3_ep_stall_set(mep, value); |
| |
| done: |
| spin_unlock_irqrestore(&mtu->lock, flags); |
| |
| return ret; |
| } |
| |
| /* Sets the halt feature with the clear requests ignored */ |
| static int mtu3_gadget_ep_set_wedge(struct usb_ep *ep) |
| { |
| struct mtu3_ep *mep = to_mtu3_ep(ep); |
| |
| if (!ep) |
| return -EINVAL; |
| |
| mep->wedged = 1; |
| |
| return usb_ep_set_halt(ep); |
| } |
| |
| static const struct usb_ep_ops mtu3_ep_ops = { |
| .enable = mtu3_gadget_ep_enable, |
| .disable = mtu3_gadget_ep_disable, |
| .alloc_request = mtu3_alloc_request, |
| .free_request = mtu3_free_request, |
| .queue = mtu3_gadget_queue, |
| .dequeue = mtu3_gadget_dequeue, |
| .set_halt = mtu3_gadget_ep_set_halt, |
| .set_wedge = mtu3_gadget_ep_set_wedge, |
| }; |
| |
| static int mtu3_gadget_get_frame(struct usb_gadget *gadget) |
| { |
| struct mtu3 *mtu = gadget_to_mtu3(gadget); |
| |
| return (int)mtu3_readl(mtu->mac_base, U3D_USB20_FRAME_NUM); |
| } |
| |
| static int mtu3_gadget_wakeup(struct usb_gadget *gadget) |
| { |
| struct mtu3 *mtu = gadget_to_mtu3(gadget); |
| unsigned long flags; |
| |
| dev_dbg(mtu->dev, "%s\n", __func__); |
| |
| /* remote wakeup feature is not enabled by host */ |
| if (!mtu->may_wakeup) |
| return -EOPNOTSUPP; |
| |
| spin_lock_irqsave(&mtu->lock, flags); |
| if (mtu->g.speed >= USB_SPEED_SUPER) { |
| mtu3_setbits(mtu->mac_base, U3D_LINK_POWER_CONTROL, UX_EXIT); |
| } else { |
| mtu3_setbits(mtu->mac_base, U3D_POWER_MANAGEMENT, RESUME); |
| spin_unlock_irqrestore(&mtu->lock, flags); |
| usleep_range(10000, 11000); |
| spin_lock_irqsave(&mtu->lock, flags); |
| mtu3_clrbits(mtu->mac_base, U3D_POWER_MANAGEMENT, RESUME); |
| } |
| spin_unlock_irqrestore(&mtu->lock, flags); |
| return 0; |
| } |
| |
| static int mtu3_gadget_set_self_powered(struct usb_gadget *gadget, |
| int is_selfpowered) |
| { |
| struct mtu3 *mtu = gadget_to_mtu3(gadget); |
| |
| mtu->is_self_powered = !!is_selfpowered; |
| return 0; |
| } |
| |
| static int mtu3_gadget_pullup(struct usb_gadget *gadget, int is_on) |
| { |
| struct mtu3 *mtu = gadget_to_mtu3(gadget); |
| unsigned long flags; |
| |
| dev_dbg(mtu->dev, "%s (%s) for %sactive device\n", __func__, |
| is_on ? "on" : "off", mtu->is_active ? "" : "in"); |
| |
| /* we'd rather not pullup unless the device is active. */ |
| spin_lock_irqsave(&mtu->lock, flags); |
| |
| is_on = !!is_on; |
| if (!mtu->is_active) { |
| /* save it for mtu3_start() to process the request */ |
| mtu->softconnect = is_on; |
| } else if (is_on != mtu->softconnect) { |
| mtu->softconnect = is_on; |
| mtu3_dev_on_off(mtu, is_on); |
| } |
| |
| spin_unlock_irqrestore(&mtu->lock, flags); |
| |
| return 0; |
| } |
| |
| static int mtu3_gadget_start(struct usb_gadget *gadget, |
| struct usb_gadget_driver *driver) |
| { |
| struct mtu3 *mtu = gadget_to_mtu3(gadget); |
| unsigned long flags; |
| |
| if (mtu->gadget_driver) { |
| dev_err(mtu->dev, "%s is already bound to %s\n", |
| mtu->g.name, mtu->gadget_driver->driver.name); |
| return -EBUSY; |
| } |
| |
| dev_dbg(mtu->dev, "bind driver %s\n", driver->function); |
| |
| spin_lock_irqsave(&mtu->lock, flags); |
| |
| mtu->softconnect = 0; |
| mtu->gadget_driver = driver; |
| |
| if (mtu->ssusb->dr_mode == USB_DR_MODE_PERIPHERAL) |
| mtu3_start(mtu); |
| |
| spin_unlock_irqrestore(&mtu->lock, flags); |
| |
| return 0; |
| } |
| |
| static void stop_activity(struct mtu3 *mtu) |
| { |
| struct usb_gadget_driver *driver = mtu->gadget_driver; |
| int i; |
| |
| /* don't disconnect if it's not connected */ |
| if (mtu->g.speed == USB_SPEED_UNKNOWN) |
| driver = NULL; |
| else |
| mtu->g.speed = USB_SPEED_UNKNOWN; |
| |
| /* deactivate the hardware */ |
| if (mtu->softconnect) { |
| mtu->softconnect = 0; |
| mtu3_dev_on_off(mtu, 0); |
| } |
| |
| /* |
| * killing any outstanding requests will quiesce the driver; |
| * then report disconnect |
| */ |
| nuke(mtu->ep0, -ESHUTDOWN); |
| for (i = 1; i < mtu->num_eps; i++) { |
| nuke(mtu->in_eps + i, -ESHUTDOWN); |
| nuke(mtu->out_eps + i, -ESHUTDOWN); |
| } |
| |
| if (driver) { |
| spin_unlock(&mtu->lock); |
| driver->disconnect(&mtu->g); |
| spin_lock(&mtu->lock); |
| } |
| } |
| |
| static int mtu3_gadget_stop(struct usb_gadget *g) |
| { |
| struct mtu3 *mtu = gadget_to_mtu3(g); |
| unsigned long flags; |
| |
| dev_dbg(mtu->dev, "%s\n", __func__); |
| |
| spin_lock_irqsave(&mtu->lock, flags); |
| |
| stop_activity(mtu); |
| mtu->gadget_driver = NULL; |
| |
| if (mtu->ssusb->dr_mode == USB_DR_MODE_PERIPHERAL) |
| mtu3_stop(mtu); |
| |
| spin_unlock_irqrestore(&mtu->lock, flags); |
| |
| synchronize_irq(mtu->irq); |
| return 0; |
| } |
| |
| static const struct usb_gadget_ops mtu3_gadget_ops = { |
| .get_frame = mtu3_gadget_get_frame, |
| .wakeup = mtu3_gadget_wakeup, |
| .set_selfpowered = mtu3_gadget_set_self_powered, |
| .pullup = mtu3_gadget_pullup, |
| .udc_start = mtu3_gadget_start, |
| .udc_stop = mtu3_gadget_stop, |
| }; |
| |
| static void mtu3_state_reset(struct mtu3 *mtu) |
| { |
| mtu->address = 0; |
| mtu->ep0_state = MU3D_EP0_STATE_SETUP; |
| mtu->may_wakeup = 0; |
| mtu->u1_enable = 0; |
| mtu->u2_enable = 0; |
| mtu->delayed_status = false; |
| mtu->test_mode = false; |
| } |
| |
| static void init_hw_ep(struct mtu3 *mtu, struct mtu3_ep *mep, |
| u32 epnum, u32 is_in) |
| { |
| mep->epnum = epnum; |
| mep->mtu = mtu; |
| mep->is_in = is_in; |
| |
| INIT_LIST_HEAD(&mep->req_list); |
| |
| sprintf(mep->name, "ep%d%s", epnum, |
| !epnum ? "" : (is_in ? "in" : "out")); |
| |
| mep->ep.name = mep->name; |
| INIT_LIST_HEAD(&mep->ep.ep_list); |
| |
| /* initialize maxpacket as SS */ |
| if (!epnum) { |
| usb_ep_set_maxpacket_limit(&mep->ep, 512); |
| mep->ep.caps.type_control = true; |
| mep->ep.ops = &mtu3_ep0_ops; |
| mtu->g.ep0 = &mep->ep; |
| } else { |
| usb_ep_set_maxpacket_limit(&mep->ep, 1024); |
| mep->ep.caps.type_iso = true; |
| mep->ep.caps.type_bulk = true; |
| mep->ep.caps.type_int = true; |
| mep->ep.ops = &mtu3_ep_ops; |
| list_add_tail(&mep->ep.ep_list, &mtu->g.ep_list); |
| } |
| |
| dev_dbg(mtu->dev, "%s, name=%s, maxp=%d\n", __func__, mep->ep.name, |
| mep->ep.maxpacket); |
| |
| if (!epnum) { |
| mep->ep.caps.dir_in = true; |
| mep->ep.caps.dir_out = true; |
| } else if (is_in) { |
| mep->ep.caps.dir_in = true; |
| } else { |
| mep->ep.caps.dir_out = true; |
| } |
| } |
| |
| static void mtu3_gadget_init_eps(struct mtu3 *mtu) |
| { |
| u8 epnum; |
| |
| /* initialize endpoint list just once */ |
| INIT_LIST_HEAD(&(mtu->g.ep_list)); |
| |
| dev_dbg(mtu->dev, "%s num_eps(1 for a pair of tx&rx ep)=%d\n", |
| __func__, mtu->num_eps); |
| |
| init_hw_ep(mtu, mtu->ep0, 0, 0); |
| for (epnum = 1; epnum < mtu->num_eps; epnum++) { |
| init_hw_ep(mtu, mtu->in_eps + epnum, epnum, 1); |
| init_hw_ep(mtu, mtu->out_eps + epnum, epnum, 0); |
| } |
| } |
| |
| int mtu3_gadget_setup(struct mtu3 *mtu) |
| { |
| int ret; |
| |
| mtu->g.ops = &mtu3_gadget_ops; |
| mtu->g.max_speed = mtu->max_speed; |
| mtu->g.speed = USB_SPEED_UNKNOWN; |
| mtu->g.sg_supported = 0; |
| mtu->g.name = MTU3_DRIVER_NAME; |
| mtu->is_active = 0; |
| mtu->delayed_status = false; |
| |
| mtu3_gadget_init_eps(mtu); |
| |
| ret = usb_add_gadget_udc(mtu->dev, &mtu->g); |
| if (ret) |
| dev_err(mtu->dev, "failed to register udc\n"); |
| |
| return ret; |
| } |
| |
| void mtu3_gadget_cleanup(struct mtu3 *mtu) |
| { |
| usb_del_gadget_udc(&mtu->g); |
| } |
| |
| void mtu3_gadget_resume(struct mtu3 *mtu) |
| { |
| dev_dbg(mtu->dev, "gadget RESUME\n"); |
| if (mtu->gadget_driver && mtu->gadget_driver->resume) { |
| spin_unlock(&mtu->lock); |
| mtu->gadget_driver->resume(&mtu->g); |
| spin_lock(&mtu->lock); |
| } |
| } |
| |
| /* called when SOF packets stop for 3+ msec or enters U3 */ |
| void mtu3_gadget_suspend(struct mtu3 *mtu) |
| { |
| dev_dbg(mtu->dev, "gadget SUSPEND\n"); |
| if (mtu->gadget_driver && mtu->gadget_driver->suspend) { |
| spin_unlock(&mtu->lock); |
| mtu->gadget_driver->suspend(&mtu->g); |
| spin_lock(&mtu->lock); |
| } |
| } |
| |
| /* called when VBUS drops below session threshold, and in other cases */ |
| void mtu3_gadget_disconnect(struct mtu3 *mtu) |
| { |
| dev_dbg(mtu->dev, "gadget DISCONNECT\n"); |
| if (mtu->gadget_driver && mtu->gadget_driver->disconnect) { |
| spin_unlock(&mtu->lock); |
| mtu->gadget_driver->disconnect(&mtu->g); |
| spin_lock(&mtu->lock); |
| } |
| |
| mtu3_state_reset(mtu); |
| usb_gadget_set_state(&mtu->g, USB_STATE_NOTATTACHED); |
| } |
| |
| void mtu3_gadget_reset(struct mtu3 *mtu) |
| { |
| dev_dbg(mtu->dev, "gadget RESET\n"); |
| |
| /* report disconnect, if we didn't flush EP state */ |
| if (mtu->g.speed != USB_SPEED_UNKNOWN) |
| mtu3_gadget_disconnect(mtu); |
| else |
| mtu3_state_reset(mtu); |
| } |