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729 lines
16 KiB
729 lines
16 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* mtu3_gadget.c - MediaTek usb3 DRD peripheral support |
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* |
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* Copyright (C) 2016 MediaTek Inc. |
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* |
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* Author: Chunfeng Yun <[email protected]> |
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*/ |
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#include "mtu3.h" |
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#include "mtu3_trace.h" |
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void mtu3_req_complete(struct mtu3_ep *mep, |
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struct usb_request *req, int status) |
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__releases(mep->mtu->lock) |
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__acquires(mep->mtu->lock) |
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{ |
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struct mtu3_request *mreq = to_mtu3_request(req); |
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struct mtu3 *mtu = mreq->mtu; |
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list_del(&mreq->list); |
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if (req->status == -EINPROGRESS) |
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req->status = status; |
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trace_mtu3_req_complete(mreq); |
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spin_unlock(&mtu->lock); |
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/* ep0 makes use of PIO, needn't unmap it */ |
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if (mep->epnum) |
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usb_gadget_unmap_request(&mtu->g, req, mep->is_in); |
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dev_dbg(mtu->dev, "%s complete req: %p, sts %d, %d/%d\n", |
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mep->name, req, req->status, req->actual, req->length); |
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usb_gadget_giveback_request(&mep->ep, req); |
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spin_lock(&mtu->lock); |
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} |
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static void nuke(struct mtu3_ep *mep, const int status) |
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{ |
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struct mtu3_request *mreq = NULL; |
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if (list_empty(&mep->req_list)) |
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return; |
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dev_dbg(mep->mtu->dev, "abort %s's req: sts %d\n", mep->name, status); |
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/* exclude EP0 */ |
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if (mep->epnum) |
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mtu3_qmu_flush(mep); |
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while (!list_empty(&mep->req_list)) { |
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mreq = list_first_entry(&mep->req_list, |
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struct mtu3_request, list); |
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mtu3_req_complete(mep, &mreq->request, status); |
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} |
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} |
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static int mtu3_ep_enable(struct mtu3_ep *mep) |
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{ |
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const struct usb_endpoint_descriptor *desc; |
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const struct usb_ss_ep_comp_descriptor *comp_desc; |
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struct mtu3 *mtu = mep->mtu; |
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u32 interval = 0; |
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u32 mult = 0; |
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u32 burst = 0; |
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int max_packet; |
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int ret; |
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desc = mep->desc; |
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comp_desc = mep->comp_desc; |
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mep->type = usb_endpoint_type(desc); |
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max_packet = usb_endpoint_maxp(desc); |
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mep->maxp = max_packet & GENMASK(10, 0); |
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switch (mtu->g.speed) { |
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case USB_SPEED_SUPER: |
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case USB_SPEED_SUPER_PLUS: |
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if (usb_endpoint_xfer_int(desc) || |
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usb_endpoint_xfer_isoc(desc)) { |
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interval = desc->bInterval; |
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interval = clamp_val(interval, 1, 16) - 1; |
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if (usb_endpoint_xfer_isoc(desc) && comp_desc) |
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mult = comp_desc->bmAttributes; |
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} |
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if (comp_desc) |
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burst = comp_desc->bMaxBurst; |
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break; |
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case USB_SPEED_HIGH: |
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if (usb_endpoint_xfer_isoc(desc) || |
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usb_endpoint_xfer_int(desc)) { |
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interval = desc->bInterval; |
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interval = clamp_val(interval, 1, 16) - 1; |
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burst = (max_packet & GENMASK(12, 11)) >> 11; |
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} |
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break; |
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default: |
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break; /*others are ignored */ |
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} |
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dev_dbg(mtu->dev, "%s maxp:%d, interval:%d, burst:%d, mult:%d\n", |
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__func__, mep->maxp, interval, burst, mult); |
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mep->ep.maxpacket = mep->maxp; |
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mep->ep.desc = desc; |
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mep->ep.comp_desc = comp_desc; |
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/* slot mainly affects bulk/isoc transfer, so ignore int */ |
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mep->slot = usb_endpoint_xfer_int(desc) ? 0 : mtu->slot; |
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ret = mtu3_config_ep(mtu, mep, interval, burst, mult); |
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if (ret < 0) |
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return ret; |
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ret = mtu3_gpd_ring_alloc(mep); |
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if (ret < 0) { |
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mtu3_deconfig_ep(mtu, mep); |
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return ret; |
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} |
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mtu3_qmu_start(mep); |
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return 0; |
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} |
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static int mtu3_ep_disable(struct mtu3_ep *mep) |
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{ |
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struct mtu3 *mtu = mep->mtu; |
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mtu3_qmu_stop(mep); |
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/* abort all pending requests */ |
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nuke(mep, -ESHUTDOWN); |
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mtu3_deconfig_ep(mtu, mep); |
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mtu3_gpd_ring_free(mep); |
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mep->desc = NULL; |
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mep->ep.desc = NULL; |
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mep->comp_desc = NULL; |
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mep->type = 0; |
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mep->flags = 0; |
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return 0; |
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} |
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static int mtu3_gadget_ep_enable(struct usb_ep *ep, |
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const struct usb_endpoint_descriptor *desc) |
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{ |
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struct mtu3_ep *mep; |
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struct mtu3 *mtu; |
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unsigned long flags; |
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int ret = -EINVAL; |
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if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) { |
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pr_debug("%s invalid parameters\n", __func__); |
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return -EINVAL; |
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} |
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if (!desc->wMaxPacketSize) { |
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pr_debug("%s missing wMaxPacketSize\n", __func__); |
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return -EINVAL; |
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} |
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mep = to_mtu3_ep(ep); |
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mtu = mep->mtu; |
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/* check ep number and direction against endpoint */ |
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if (usb_endpoint_num(desc) != mep->epnum) |
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return -EINVAL; |
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if (!!usb_endpoint_dir_in(desc) ^ !!mep->is_in) |
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return -EINVAL; |
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dev_dbg(mtu->dev, "%s %s\n", __func__, ep->name); |
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if (mep->flags & MTU3_EP_ENABLED) { |
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dev_WARN_ONCE(mtu->dev, true, "%s is already enabled\n", |
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mep->name); |
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return 0; |
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} |
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spin_lock_irqsave(&mtu->lock, flags); |
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mep->desc = desc; |
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mep->comp_desc = ep->comp_desc; |
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ret = mtu3_ep_enable(mep); |
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if (ret) |
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goto error; |
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mep->flags = MTU3_EP_ENABLED; |
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mtu->active_ep++; |
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error: |
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spin_unlock_irqrestore(&mtu->lock, flags); |
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dev_dbg(mtu->dev, "%s active_ep=%d\n", __func__, mtu->active_ep); |
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trace_mtu3_gadget_ep_enable(mep); |
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return ret; |
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} |
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static int mtu3_gadget_ep_disable(struct usb_ep *ep) |
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{ |
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struct mtu3_ep *mep = to_mtu3_ep(ep); |
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struct mtu3 *mtu = mep->mtu; |
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unsigned long flags; |
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dev_dbg(mtu->dev, "%s %s\n", __func__, mep->name); |
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trace_mtu3_gadget_ep_disable(mep); |
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if (!(mep->flags & MTU3_EP_ENABLED)) { |
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dev_warn(mtu->dev, "%s is already disabled\n", mep->name); |
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return 0; |
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} |
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spin_lock_irqsave(&mtu->lock, flags); |
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mtu3_ep_disable(mep); |
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mep->flags = 0; |
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mtu->active_ep--; |
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spin_unlock_irqrestore(&(mtu->lock), flags); |
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dev_dbg(mtu->dev, "%s active_ep=%d, mtu3 is_active=%d\n", |
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__func__, mtu->active_ep, mtu->is_active); |
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return 0; |
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} |
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struct usb_request *mtu3_alloc_request(struct usb_ep *ep, gfp_t gfp_flags) |
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{ |
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struct mtu3_ep *mep = to_mtu3_ep(ep); |
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struct mtu3_request *mreq; |
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mreq = kzalloc(sizeof(*mreq), gfp_flags); |
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if (!mreq) |
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return NULL; |
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mreq->request.dma = DMA_ADDR_INVALID; |
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mreq->epnum = mep->epnum; |
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mreq->mep = mep; |
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trace_mtu3_alloc_request(mreq); |
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return &mreq->request; |
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} |
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void mtu3_free_request(struct usb_ep *ep, struct usb_request *req) |
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{ |
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struct mtu3_request *mreq = to_mtu3_request(req); |
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trace_mtu3_free_request(mreq); |
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kfree(mreq); |
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} |
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static int mtu3_gadget_queue(struct usb_ep *ep, |
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struct usb_request *req, gfp_t gfp_flags) |
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{ |
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struct mtu3_ep *mep = to_mtu3_ep(ep); |
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struct mtu3_request *mreq = to_mtu3_request(req); |
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struct mtu3 *mtu = mep->mtu; |
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unsigned long flags; |
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int ret = 0; |
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if (!req->buf) |
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return -ENODATA; |
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if (mreq->mep != mep) |
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return -EINVAL; |
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dev_dbg(mtu->dev, "%s %s EP%d(%s), req=%p, maxp=%d, len#%d\n", |
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__func__, mep->is_in ? "TX" : "RX", mreq->epnum, ep->name, |
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mreq, ep->maxpacket, mreq->request.length); |
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if (req->length > GPD_BUF_SIZE || |
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(mtu->gen2cp && req->length > GPD_BUF_SIZE_EL)) { |
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dev_warn(mtu->dev, |
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"req length > supported MAX:%d requested:%d\n", |
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mtu->gen2cp ? GPD_BUF_SIZE_EL : GPD_BUF_SIZE, |
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req->length); |
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return -EOPNOTSUPP; |
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} |
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/* don't queue if the ep is down */ |
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if (!mep->desc) { |
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dev_dbg(mtu->dev, "req=%p queued to %s while it's disabled\n", |
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req, ep->name); |
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return -ESHUTDOWN; |
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} |
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mreq->mtu = mtu; |
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mreq->request.actual = 0; |
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mreq->request.status = -EINPROGRESS; |
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ret = usb_gadget_map_request(&mtu->g, req, mep->is_in); |
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if (ret) { |
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dev_err(mtu->dev, "dma mapping failed\n"); |
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return ret; |
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} |
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spin_lock_irqsave(&mtu->lock, flags); |
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if (mtu3_prepare_transfer(mep)) { |
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ret = -EAGAIN; |
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goto error; |
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} |
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list_add_tail(&mreq->list, &mep->req_list); |
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mtu3_insert_gpd(mep, mreq); |
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mtu3_qmu_resume(mep); |
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error: |
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spin_unlock_irqrestore(&mtu->lock, flags); |
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trace_mtu3_gadget_queue(mreq); |
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return ret; |
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} |
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static int mtu3_gadget_dequeue(struct usb_ep *ep, struct usb_request *req) |
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{ |
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struct mtu3_ep *mep = to_mtu3_ep(ep); |
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struct mtu3_request *mreq = to_mtu3_request(req); |
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struct mtu3_request *r; |
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struct mtu3 *mtu = mep->mtu; |
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unsigned long flags; |
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int ret = 0; |
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if (mreq->mep != mep) |
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return -EINVAL; |
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dev_dbg(mtu->dev, "%s : req=%p\n", __func__, req); |
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trace_mtu3_gadget_dequeue(mreq); |
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spin_lock_irqsave(&mtu->lock, flags); |
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list_for_each_entry(r, &mep->req_list, list) { |
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if (r == mreq) |
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break; |
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} |
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if (r != mreq) { |
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dev_dbg(mtu->dev, "req=%p not queued to %s\n", req, ep->name); |
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ret = -EINVAL; |
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goto done; |
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} |
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mtu3_qmu_flush(mep); /* REVISIT: set BPS ?? */ |
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mtu3_req_complete(mep, req, -ECONNRESET); |
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mtu3_qmu_start(mep); |
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done: |
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spin_unlock_irqrestore(&mtu->lock, flags); |
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return ret; |
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} |
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/* |
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* Set or clear the halt bit of an EP. |
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* A halted EP won't TX/RX any data but will queue requests. |
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*/ |
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static int mtu3_gadget_ep_set_halt(struct usb_ep *ep, int value) |
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{ |
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struct mtu3_ep *mep = to_mtu3_ep(ep); |
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struct mtu3 *mtu = mep->mtu; |
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struct mtu3_request *mreq; |
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unsigned long flags; |
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int ret = 0; |
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dev_dbg(mtu->dev, "%s : %s...", __func__, ep->name); |
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spin_lock_irqsave(&mtu->lock, flags); |
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if (mep->type == USB_ENDPOINT_XFER_ISOC) { |
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ret = -EINVAL; |
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goto done; |
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} |
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mreq = next_request(mep); |
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if (value) { |
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/* |
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* If there is not request for TX-EP, QMU will not transfer |
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* data to TX-FIFO, so no need check whether TX-FIFO |
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* holds bytes or not here |
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*/ |
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if (mreq) { |
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dev_dbg(mtu->dev, "req in progress, cannot halt %s\n", |
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ep->name); |
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ret = -EAGAIN; |
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goto done; |
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} |
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} else { |
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mep->flags &= ~MTU3_EP_WEDGE; |
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} |
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dev_dbg(mtu->dev, "%s %s stall\n", ep->name, value ? "set" : "clear"); |
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mtu3_ep_stall_set(mep, value); |
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done: |
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spin_unlock_irqrestore(&mtu->lock, flags); |
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trace_mtu3_gadget_ep_set_halt(mep); |
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return ret; |
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} |
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/* Sets the halt feature with the clear requests ignored */ |
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static int mtu3_gadget_ep_set_wedge(struct usb_ep *ep) |
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{ |
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struct mtu3_ep *mep = to_mtu3_ep(ep); |
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mep->flags |= MTU3_EP_WEDGE; |
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return usb_ep_set_halt(ep); |
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} |
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static const struct usb_ep_ops mtu3_ep_ops = { |
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.enable = mtu3_gadget_ep_enable, |
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.disable = mtu3_gadget_ep_disable, |
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.alloc_request = mtu3_alloc_request, |
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.free_request = mtu3_free_request, |
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.queue = mtu3_gadget_queue, |
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.dequeue = mtu3_gadget_dequeue, |
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.set_halt = mtu3_gadget_ep_set_halt, |
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.set_wedge = mtu3_gadget_ep_set_wedge, |
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}; |
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static int mtu3_gadget_get_frame(struct usb_gadget *gadget) |
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{ |
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struct mtu3 *mtu = gadget_to_mtu3(gadget); |
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return (int)mtu3_readl(mtu->mac_base, U3D_USB20_FRAME_NUM); |
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} |
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static int mtu3_gadget_wakeup(struct usb_gadget *gadget) |
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{ |
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struct mtu3 *mtu = gadget_to_mtu3(gadget); |
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unsigned long flags; |
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dev_dbg(mtu->dev, "%s\n", __func__); |
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/* remote wakeup feature is not enabled by host */ |
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if (!mtu->may_wakeup) |
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return -EOPNOTSUPP; |
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spin_lock_irqsave(&mtu->lock, flags); |
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if (mtu->g.speed >= USB_SPEED_SUPER) { |
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mtu3_setbits(mtu->mac_base, U3D_LINK_POWER_CONTROL, UX_EXIT); |
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} else { |
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mtu3_setbits(mtu->mac_base, U3D_POWER_MANAGEMENT, RESUME); |
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spin_unlock_irqrestore(&mtu->lock, flags); |
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usleep_range(10000, 11000); |
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spin_lock_irqsave(&mtu->lock, flags); |
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mtu3_clrbits(mtu->mac_base, U3D_POWER_MANAGEMENT, RESUME); |
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} |
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spin_unlock_irqrestore(&mtu->lock, flags); |
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return 0; |
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} |
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static int mtu3_gadget_set_self_powered(struct usb_gadget *gadget, |
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int is_selfpowered) |
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{ |
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struct mtu3 *mtu = gadget_to_mtu3(gadget); |
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mtu->is_self_powered = !!is_selfpowered; |
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return 0; |
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} |
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static int mtu3_gadget_pullup(struct usb_gadget *gadget, int is_on) |
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{ |
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struct mtu3 *mtu = gadget_to_mtu3(gadget); |
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unsigned long flags; |
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dev_dbg(mtu->dev, "%s (%s) for %sactive device\n", __func__, |
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is_on ? "on" : "off", mtu->is_active ? "" : "in"); |
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/* we'd rather not pullup unless the device is active. */ |
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spin_lock_irqsave(&mtu->lock, flags); |
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is_on = !!is_on; |
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if (!mtu->is_active) { |
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/* save it for mtu3_start() to process the request */ |
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mtu->softconnect = is_on; |
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} else if (is_on != mtu->softconnect) { |
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mtu->softconnect = is_on; |
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mtu3_dev_on_off(mtu, is_on); |
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} |
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spin_unlock_irqrestore(&mtu->lock, flags); |
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return 0; |
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} |
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static int mtu3_gadget_start(struct usb_gadget *gadget, |
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struct usb_gadget_driver *driver) |
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{ |
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struct mtu3 *mtu = gadget_to_mtu3(gadget); |
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unsigned long flags; |
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if (mtu->gadget_driver) { |
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dev_err(mtu->dev, "%s is already bound to %s\n", |
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mtu->g.name, mtu->gadget_driver->driver.name); |
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return -EBUSY; |
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} |
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dev_dbg(mtu->dev, "bind driver %s\n", driver->function); |
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spin_lock_irqsave(&mtu->lock, flags); |
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mtu->softconnect = 0; |
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mtu->gadget_driver = driver; |
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if (mtu->ssusb->dr_mode == USB_DR_MODE_PERIPHERAL) |
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mtu3_start(mtu); |
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spin_unlock_irqrestore(&mtu->lock, flags); |
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return 0; |
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} |
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static void stop_activity(struct mtu3 *mtu) |
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{ |
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struct usb_gadget_driver *driver = mtu->gadget_driver; |
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int i; |
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|
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/* don't disconnect if it's not connected */ |
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if (mtu->g.speed == USB_SPEED_UNKNOWN) |
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driver = NULL; |
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else |
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mtu->g.speed = USB_SPEED_UNKNOWN; |
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|
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/* deactivate the hardware */ |
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if (mtu->softconnect) { |
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mtu->softconnect = 0; |
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mtu3_dev_on_off(mtu, 0); |
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} |
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|
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/* |
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* killing any outstanding requests will quiesce the driver; |
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* then report disconnect |
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*/ |
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nuke(mtu->ep0, -ESHUTDOWN); |
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for (i = 1; i < mtu->num_eps; i++) { |
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nuke(mtu->in_eps + i, -ESHUTDOWN); |
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nuke(mtu->out_eps + i, -ESHUTDOWN); |
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} |
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if (driver) { |
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spin_unlock(&mtu->lock); |
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driver->disconnect(&mtu->g); |
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spin_lock(&mtu->lock); |
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} |
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} |
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static int mtu3_gadget_stop(struct usb_gadget *g) |
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{ |
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struct mtu3 *mtu = gadget_to_mtu3(g); |
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unsigned long flags; |
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dev_dbg(mtu->dev, "%s\n", __func__); |
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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 void |
|
mtu3_gadget_set_speed(struct usb_gadget *g, enum usb_device_speed speed) |
|
{ |
|
struct mtu3 *mtu = gadget_to_mtu3(g); |
|
unsigned long flags; |
|
|
|
dev_dbg(mtu->dev, "%s %s\n", __func__, usb_speed_string(speed)); |
|
|
|
spin_lock_irqsave(&mtu->lock, flags); |
|
mtu3_set_speed(mtu, speed); |
|
spin_unlock_irqrestore(&mtu->lock, flags); |
|
} |
|
|
|
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, |
|
.udc_set_speed = mtu3_gadget_set_speed, |
|
}; |
|
|
|
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) |
|
{ |
|
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); |
|
|
|
return usb_add_gadget_udc(mtu->dev, &mtu->g); |
|
} |
|
|
|
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); |
|
}
|
|
|