c65bfa62b7
If dma buffers are mapped by a higher layer, with a boolean musb_request.mapped it is still possible to call dma_sync_single_for_device() from musb_g_giveback(), even if txstate()/rxstate() has called unmap_dma_buffer() before falling back to pio mode. Moreover, check for musb_ep->dma is moved within map_dma_buffer() so where applicable checks for it are removed. And where possible, checks for is_dma_capable() are merged with buffer map state check. Signed-off-by: Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
119 lines
3.5 KiB
C
119 lines
3.5 KiB
C
/*
|
|
* 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
|
|
|
|
enum buffer_map_state {
|
|
UN_MAPPED = 0,
|
|
PRE_MAPPED,
|
|
MUSB_MAPPED
|
|
};
|
|
|
|
struct musb_request {
|
|
struct usb_request request;
|
|
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 usb_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 usb_request, list);
|
|
}
|
|
|
|
extern void musb_g_tx(struct musb *musb, u8 epnum);
|
|
extern void musb_g_rx(struct musb *musb, u8 epnum);
|
|
|
|
extern const struct usb_ep_ops musb_g_ep0_ops;
|
|
|
|
extern int musb_gadget_setup(struct musb *);
|
|
extern void musb_gadget_cleanup(struct musb *);
|
|
|
|
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 */
|