/*
* dma map/unmap
*/
static int usbhsg_dma_map_ctrl(struct usbhs_pkt *pkt, int map)
{
struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
struct usb_request *req = &ureq->req;
struct usbhs_pipe *pipe = pkt->pipe;
struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe);
struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
enum dma_data_direction dir;
int ret = 0;
dir = usbhs_pipe_is_dir_host(pipe);
if (map) {
/* it can not use scatter/gather */
WARN_ON(req->num_sgs);
ret = usb_gadget_map_request(&gpriv->gadget, req, dir);
if (ret < 0)
return ret;
pkt->dma = req->dma;
} else {
usb_gadget_unmap_request(&gpriv->gadget, req, dir);
}
return ret;
}
/*
* dma map/unmap
*/
static int usbhsg_dma_map(struct device *dev,
struct usbhs_pkt *pkt,
enum dma_data_direction dir)
{
struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
struct usb_request *req = &ureq->req;
if (pkt->dma != DMA_ADDR_INVALID) {
dev_err(dev, "dma is already mapped\n");
return -EIO;
}
if (req->dma == DMA_ADDR_INVALID) {
pkt->dma = dma_map_single(dev, pkt->buf, pkt->length, dir);
} else {
dma_sync_single_for_device(dev, req->dma, req->length, dir);
pkt->dma = req->dma;
}
if (dma_mapping_error(dev, pkt->dma)) {
dev_err(dev, "dma mapping error %x\n", pkt->dma);
return -EIO;
}
return 0;
}
static void usbhsg_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
{
struct usbhs_pipe *pipe = pkt->pipe;
struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe);
struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
ureq->req.actual = pkt->actual;
usbhsg_queue_pop(uep, ureq, 0);
}
static void usbhsg_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
{
struct usbhs_pipe *pipe = pkt->pipe;
struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe);
struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
unsigned long flags;
ureq->req.actual = pkt->actual;
usbhs_lock(priv, flags);
if (uep)
__usbhsg_queue_pop(uep, ureq, 0);
usbhs_unlock(priv, flags);
}
/*
*
* usb_dcp_ops
*
*/
static int usbhsg_pipe_disable(struct usbhsg_uep *uep)
{
struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
struct usbhs_pkt *pkt;
while (1) {
pkt = usbhs_pkt_pop(pipe, NULL);
if (!pkt)
break;
usbhsg_queue_pop(uep, usbhsg_pkt_to_ureq(pkt), -ECONNRESET);
}
usbhs_pipe_disable(pipe);
return 0;
}
static int usbhsg_dma_unmap(struct device *dev,
struct usbhs_pkt *pkt,
enum dma_data_direction dir)
{
struct usbhsg_request *ureq = usbhsg_pkt_to_ureq(pkt);
struct usb_request *req = &ureq->req;
if (pkt->dma == DMA_ADDR_INVALID) {
dev_err(dev, "dma is not mapped\n");
return -EIO;
}
if (req->dma == DMA_ADDR_INVALID)
dma_unmap_single(dev, pkt->dma, pkt->length, dir);
else
dma_sync_single_for_cpu(dev, req->dma, req->length, dir);
pkt->dma = DMA_ADDR_INVALID;
return 0;
}