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7a60855972
According to our Gadget Framework API documentation, ->set_halt() *must* return -EAGAIN if we have pending transfers (on either direction) or FIFO isn't empty (on TX endpoints). Fix this bug so that the mass storage gadget can be used without stall=0 parameter. This patch should be backported to all kernels since v3.2. Cc: <stable@vger.kernel.org> # v3.2+ Suggested-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Felipe Balbi <balbi@ti.com>
108 lines
3.5 KiB
C
108 lines
3.5 KiB
C
/**
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* gadget.h - DesignWare USB3 DRD Gadget Header
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*
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* Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
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*
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* Authors: Felipe Balbi <balbi@ti.com>,
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* Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 of
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* the License as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef __DRIVERS_USB_DWC3_GADGET_H
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#define __DRIVERS_USB_DWC3_GADGET_H
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#include <linux/list.h>
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#include <linux/usb/gadget.h>
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#include "io.h"
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struct dwc3;
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#define to_dwc3_ep(ep) (container_of(ep, struct dwc3_ep, endpoint))
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#define gadget_to_dwc(g) (container_of(g, struct dwc3, gadget))
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/* DEPCFG parameter 1 */
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#define DWC3_DEPCFG_INT_NUM(n) ((n) << 0)
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#define DWC3_DEPCFG_XFER_COMPLETE_EN (1 << 8)
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#define DWC3_DEPCFG_XFER_IN_PROGRESS_EN (1 << 9)
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#define DWC3_DEPCFG_XFER_NOT_READY_EN (1 << 10)
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#define DWC3_DEPCFG_FIFO_ERROR_EN (1 << 11)
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#define DWC3_DEPCFG_STREAM_EVENT_EN (1 << 13)
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#define DWC3_DEPCFG_BINTERVAL_M1(n) ((n) << 16)
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#define DWC3_DEPCFG_STREAM_CAPABLE (1 << 24)
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#define DWC3_DEPCFG_EP_NUMBER(n) ((n) << 25)
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#define DWC3_DEPCFG_BULK_BASED (1 << 30)
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#define DWC3_DEPCFG_FIFO_BASED (1 << 31)
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/* DEPCFG parameter 0 */
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#define DWC3_DEPCFG_EP_TYPE(n) ((n) << 1)
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#define DWC3_DEPCFG_MAX_PACKET_SIZE(n) ((n) << 3)
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#define DWC3_DEPCFG_FIFO_NUMBER(n) ((n) << 17)
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#define DWC3_DEPCFG_BURST_SIZE(n) ((n) << 22)
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#define DWC3_DEPCFG_DATA_SEQ_NUM(n) ((n) << 26)
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/* This applies for core versions earlier than 1.94a */
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#define DWC3_DEPCFG_IGN_SEQ_NUM (1 << 31)
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/* These apply for core versions 1.94a and later */
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#define DWC3_DEPCFG_ACTION_INIT (0 << 30)
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#define DWC3_DEPCFG_ACTION_RESTORE (1 << 30)
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#define DWC3_DEPCFG_ACTION_MODIFY (2 << 30)
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/* DEPXFERCFG parameter 0 */
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#define DWC3_DEPXFERCFG_NUM_XFER_RES(n) ((n) & 0xffff)
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/* -------------------------------------------------------------------------- */
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#define to_dwc3_request(r) (container_of(r, struct dwc3_request, request))
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static inline struct dwc3_request *next_request(struct list_head *list)
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{
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if (list_empty(list))
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return NULL;
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return list_first_entry(list, struct dwc3_request, list);
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}
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static inline void dwc3_gadget_move_request_queued(struct dwc3_request *req)
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{
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struct dwc3_ep *dep = req->dep;
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req->queued = true;
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list_move_tail(&req->list, &dep->req_queued);
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}
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void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req,
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int status);
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void dwc3_ep0_interrupt(struct dwc3 *dwc,
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const struct dwc3_event_depevt *event);
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void dwc3_ep0_out_start(struct dwc3 *dwc);
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int __dwc3_gadget_ep0_set_halt(struct usb_ep *ep, int value);
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int dwc3_gadget_ep0_set_halt(struct usb_ep *ep, int value);
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int dwc3_gadget_ep0_queue(struct usb_ep *ep, struct usb_request *request,
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gfp_t gfp_flags);
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int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value, int protocol);
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/**
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* dwc3_gadget_ep_get_transfer_index - Gets transfer index from HW
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* @dwc: DesignWare USB3 Pointer
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* @number: DWC endpoint number
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*
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* Caller should take care of locking
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*/
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static inline u32 dwc3_gadget_ep_get_transfer_index(struct dwc3 *dwc, u8 number)
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{
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u32 res_id;
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res_id = dwc3_readl(dwc->regs, DWC3_DEPCMD(number));
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return DWC3_DEPCMD_GET_RSC_IDX(res_id);
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}
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#endif /* __DRIVERS_USB_DWC3_GADGET_H */
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