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// SPDX-License-Identifier: GPL-2.0
/*
* MUSB OTG driver peripheral defines
*
* Copyright 2005 Mentor Graphics Corporation
* Copyright (C) 2005-2006 by Texas Instruments
* Copyright (C) 2006-2007 Nokia Corporation
*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef __MUSB_GADGET_H
#define __MUSB_GADGET_H
#include <linux/list.h>
#if IS_ENABLED(CONFIG_USB_MUSB_GADGET) || IS_ENABLED(CONFIG_USB_MUSB_DUAL_ROLE)
extern irqreturn_t musb_g_ep0_irq(struct musb *);
extern void musb_g_tx(struct musb *, u8);
extern void musb_g_rx(struct musb *, u8);
extern void musb_g_reset(struct musb *);
extern void musb_g_suspend(struct musb *);
extern void musb_g_resume(struct musb *);
extern void musb_g_wakeup(struct musb *);
extern void musb_g_disconnect(struct musb *);
extern void musb_gadget_cleanup(struct musb *);
extern int musb_gadget_setup(struct musb *);
#else
static inline irqreturn_t musb_g_ep0_irq(struct musb *musb)
{
return 0;
}
static inline void musb_g_tx(struct musb *musb, u8 epnum) {}
static inline void musb_g_rx(struct musb *musb, u8 epnum) {}
static inline void musb_g_reset(struct musb *musb) {}
static inline void musb_g_suspend(struct musb *musb) {}
static inline void musb_g_resume(struct musb *musb) {}
static inline void musb_g_wakeup(struct musb *musb) {}
static inline void musb_g_disconnect(struct musb *musb) {}
static inline void musb_gadget_cleanup(struct musb *musb) {}
static inline int musb_gadget_setup(struct musb *musb)
{
return 0;
}
#endif
enum buffer_map_state {
UN_MAPPED = 0,
PRE_MAPPED,
MUSB_MAPPED
};
struct musb_request {
struct usb_request request;
struct list_head list;
struct musb_ep *ep;
struct musb *musb;
u8 tx; /* endpoint direction */
u8 epnum;
enum buffer_map_state map_state;
};
static inline struct musb_request *to_musb_request(struct usb_request *req)
{
return req ? container_of(req, struct musb_request, request) : NULL;
}
extern struct usb_request *
musb_alloc_request(struct usb_ep *ep, gfp_t gfp_flags);
extern void musb_free_request(struct usb_ep *ep, struct usb_request *req);
/*
* struct musb_ep - peripheral side view of endpoint rx or tx side
*/
struct musb_ep {
/* stuff towards the head is basically write-once. */
struct usb_ep end_point;
char name[12];
struct musb_hw_ep *hw_ep;
struct musb *musb;
u8 current_epnum;
/* ... when enabled/disabled ... */
u8 type;
u8 is_in;
u16 packet_sz;
const struct usb_endpoint_descriptor *desc;
struct dma_channel *dma;
/* later things are modified based on usage */
struct list_head req_list;
u8 wedged;
/* true if lock must be dropped but req_list may not be advanced */
u8 busy;
u8 hb_mult;
};
static inline struct musb_ep *to_musb_ep(struct usb_ep *ep)
{
return ep ? container_of(ep, struct musb_ep, end_point) : NULL;
}
static inline struct musb_request *next_request(struct musb_ep *ep)
{
struct list_head *queue = &ep->req_list;
if (list_empty(queue))
return NULL;
return container_of(queue->next, struct musb_request, list);
}
extern const struct usb_ep_ops musb_g_ep0_ops;
extern void musb_g_giveback(struct musb_ep *, struct usb_request *, int);
extern void musb_ep_restart(struct musb *, struct musb_request *);
#endif /* __MUSB_GADGET_H */
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