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| author | Stephen Warren <swarren@nvidia.com> | 2014-05-29 14:53:02 -0600 |
|---|---|---|
| committer | Marek Vasut <marex@denx.de> | 2014-06-01 19:22:40 +0200 |
| commit | a2d8f929857b7bc50528114c29e48a99cbcee1f1 (patch) | |
| tree | 73efb517d9edb37c45ee59aff6e81326038158b4 /drivers/usb | |
| parent | 054731b09e1944cdb130b755ac0f6c188920e98a (diff) | |
| download | u-boot-imx-a2d8f929857b7bc50528114c29e48a99cbcee1f1.zip u-boot-imx-a2d8f929857b7bc50528114c29e48a99cbcee1f1.tar.gz u-boot-imx-a2d8f929857b7bc50528114c29e48a99cbcee1f1.tar.bz2 | |
usb: ci_udc: pre-allocate ep0 req
Allocate ep0's USB request object when the UDC driver is probed. This
solves a couple of issues in the current code:
a) A request object always exists for ep0. Prior to this patch, if setup
transactions arrived in an unexpected order, handle_setup() would need
to reply to a setup transaction before any ep0 usb_req was created.
This issue was introduced in commit 2813006fecda "usb: ci_udc: allow
multiple buffer allocs per ep."
b) handle_ep_complete no longer /has/ to queue the ep0 request again
after every single request completion. This is currently required, since
handle_setup() assumes it can find some request object in ep0's request
queue. This patch doesn't actually stop handle_ep_complete() from always
requeueing the request, but the next patch will.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/gadget/ci_udc.c | 17 | ||||
| -rw-r--r-- | drivers/usb/gadget/ci_udc.h | 1 |
2 files changed, 17 insertions, 1 deletions
diff --git a/drivers/usb/gadget/ci_udc.c b/drivers/usb/gadget/ci_udc.c index 77f8c9e..03ad231 100644 --- a/drivers/usb/gadget/ci_udc.c +++ b/drivers/usb/gadget/ci_udc.c @@ -198,8 +198,14 @@ static void ci_invalidate_qtd(int ep_num) static struct usb_request * ci_ep_alloc_request(struct usb_ep *ep, unsigned int gfp_flags) { + struct ci_ep *ci_ep = container_of(ep, struct ci_ep, ep); + int num; struct ci_req *ci_req; + num = ci_ep->desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK; + if (num == 0 && controller.ep0_req) + return &controller.ep0_req->req; + ci_req = memalign(ARCH_DMA_MINALIGN, sizeof(*ci_req)); if (!ci_req) return NULL; @@ -207,6 +213,9 @@ ci_ep_alloc_request(struct usb_ep *ep, unsigned int gfp_flags) INIT_LIST_HEAD(&ci_req->queue); ci_req->b_buf = 0; + if (num == 0) + controller.ep0_req = ci_req; + return &ci_req->req; } @@ -471,7 +480,7 @@ static void handle_setup(void) int num, in, _num, _in, i; char *buf; - ci_req = list_first_entry(&ci_ep->queue, struct ci_req, queue); + ci_req = controller.ep0_req; req = &ci_req->req; head = ci_get_qh(0, 0); /* EP0 OUT */ @@ -780,6 +789,12 @@ static int ci_udc_probe(void) &controller.gadget.ep_list); } + ci_ep_alloc_request(&controller.ep[0].ep, 0); + if (!controller.ep0_req) { + free(controller.epts); + return -ENOMEM; + } + return 0; } diff --git a/drivers/usb/gadget/ci_udc.h b/drivers/usb/gadget/ci_udc.h index 23cff56..7d76af8 100644 --- a/drivers/usb/gadget/ci_udc.h +++ b/drivers/usb/gadget/ci_udc.h @@ -97,6 +97,7 @@ struct ci_ep { struct ci_drv { struct usb_gadget gadget; + struct ci_req *ep0_req; struct usb_gadget_driver *driver; struct ehci_ctrl *ctrl; struct ept_queue_head *epts; |