Hi Felipe
Thank you for your rework
> those routines have everything we need to map/unmap
> USB requests and it's better to use them.
>
> Signed-off-by: Felipe Balbi <balbi@xxxxxx>
> ---
> drivers/usb/renesas_usbhs/mod_gadget.c | 73 +++++++------------------------
> 1 files changed, 17 insertions(+), 56 deletions(-)
>
> diff --git a/drivers/usb/renesas_usbhs/mod_gadget.c b/drivers/usb/renesas_usbhs/mod_gadget.c
> index 528691d5f..685c434 100644
> --- a/drivers/usb/renesas_usbhs/mod_gadget.c
> +++ b/drivers/usb/renesas_usbhs/mod_gadget.c
> @@ -165,69 +165,32 @@ static void usbhsg_queue_push(struct usbhsg_uep *uep,
> /*
> * 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 %llx\n", (u64)pkt->dma);
> - return -EIO;
> - }
> -
> - return 0;
> -}
> -
> -static int usbhsg_dma_unmap(struct device *dev,
> - struct usbhs_pkt *pkt,
> - enum dma_data_direction dir)
> +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;
> -
> - 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;
> -}
> -
> -static int usbhsg_dma_map_ctrl(struct usbhs_pkt *pkt, int map)
> -{
> struct usbhs_pipe *pipe = pkt->pipe;
> struct usbhsg_uep *uep = usbhsg_pipe_to_uep(pipe);
> struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
> - struct device *dev = usbhsg_gpriv_to_dev(gpriv);
> enum dma_data_direction dir;
> + int ret = 0;
>
> - dir = usbhs_pipe_is_dir_in(pipe) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
> + dir = usbhs_pipe_is_dir_in(pipe);
Sorry for confusion, but this is wrong.
It mean "pipe" direction from renesas_usbhs point, not "endpoint" direction.
So, correct dir is
dir = !usbhs_pipe_is_dir_in(pipe);
or
dir = usbhs_pipe_is_dir_host(pipe);
If I add this fix, renesas_usbhs works.
> - if (map)
> - return usbhsg_dma_map(dev, pkt, dir);
> - else
> - return usbhsg_dma_unmap(dev, pkt, dir);
> + 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;
> }
>
> /*
> @@ -657,8 +620,6 @@ static struct usb_request *usbhsg_ep_alloc_request(struct usb_ep *ep,
>
> usbhs_pkt_init(usbhsg_ureq_to_pkt(ureq));
>
> - ureq->req.dma = DMA_ADDR_INVALID;
> -
> return &ureq->req;
> }
>
> --
> 1.7.8.rc4
>
Best regards
---
Kuninori Morimoto
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