korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-12-02 00:24:12 +08:00
Code Issues Packages Projects Releases Wiki Activity

usb: dwc3: ep0: preparation for handling non maxpacket aligned transfers > 512

Browse Source 
No functional change. This is in preparation for handling non maxpacket
aligned transfers greater than bounce buffer size. This is basically to
avoid code duplication when using chained TRB transfers to handle
non maxpacket aligned transfers greater than bounce buffer size.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Kishon Vijay Abraham I 2015-07-27 12:25:29 +05:30 committed by Felipe Balbi
parent 2e5464da4e
commit 8a34422056
1 changed files with 17 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
drivers/usb/dwc3/ep0.c
View File

@ -783,7 +783,11 @@ static void dwc3_ep0_complete_data(struct dwc3 *dwc,
struct usb_request *ur;
struct dwc3_trb *trb;
struct dwc3_ep *ep0;
u32 transferred;
unsigned transfer_size = 0;
unsigned maxp;
unsigned remaining_ur_length;
void *buf;
u32 transferred = 0;
u32 status;
u32 length;
u8 epnum;
@ -812,20 +816,24 @@ static void dwc3_ep0_complete_data(struct dwc3 *dwc,
}
ur = &r->request;
buf = ur->buf;
remaining_ur_length = ur->length;
length = trb->size & DWC3_TRB_SIZE_MASK;
maxp = ep0->endpoint.maxpacket;
if (dwc->ep0_bounced) {
unsigned maxp = ep0->endpoint.maxpacket;
unsigned transfer_size = roundup(ur->length, maxp);
transfer_size = roundup((ur->length - transfer_size),
maxp);
/* Maximum of DWC3_EP0_BOUNCE_SIZE can only be received */
if (transfer_size > DWC3_EP0_BOUNCE_SIZE)
transfer_size = DWC3_EP0_BOUNCE_SIZE;
transferred = min_t(u32, ur->length,
transfer_size - length);
memcpy(ur->buf, dwc->ep0_bounce, transferred);
transferred = min_t(u32, remaining_ur_length,
transfer_size - length);
memcpy(buf, dwc->ep0_bounce, transferred);
} else {
transferred = ur->length - length;
}
@ -934,7 +942,7 @@ static void __dwc3_ep0_do_control_data(struct dwc3 *dwc,
DWC3_TRBCTL_CONTROL_DATA);
} else if (!IS_ALIGNED(req->request.length, dep->endpoint.maxpacket)
&& (dep->number == 0)) {
u32 transfer_size;
u32 transfer_size = 0;
u32 maxpacket;
ret = usb_gadget_map_request(&dwc->gadget, &req->request,
@ -945,7 +953,8 @@ static void __dwc3_ep0_do_control_data(struct dwc3 *dwc,
}
maxpacket = dep->endpoint.maxpacket;
transfer_size = roundup(req->request.length, maxpacket);
transfer_size = roundup((req->request.length - transfer_size),
maxpacket);
if (transfer_size > DWC3_EP0_BOUNCE_SIZE) {
dev_WARN(dwc->dev, "bounce buf can't handle req len\n");