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authorGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-03-01 21:20:28 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-03-01 21:20:28 +0400
commitf9b0f5170918695891f42645737682ccb452ee13 (patch)
tree75eaab0ff54f8aadaa6375df140cc9d685f78d95 /drivers/usb/gadget/langwell_udc.c
parent8062d94a545457a83d5291bd62c3bfd14200bba0 (diff)
parent6440093f5eae9842feb06e40d41c3bd569b6b461 (diff)
downloadlinux-f9b0f5170918695891f42645737682ccb452ee13.tar.xz
Merge tag 'gadget-for-v3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next
USB: Gadget: changes for 3.4 This merge is rather big. Here's what it contains: For am5536udc we have just simple coding style fixes. Nothing that has any potential to cause any issues going forward. With mv_udc, there's only one single change removing an unneeded NULL check. at91_udc also only saw a single change this merge window, and that's only removing a duplicated header. The Renesas controller has a few more involved changes. Support for SUDMAC was added, there's now a special handling of IRQ resources for when the IRQ line is shared between Renesas controller and SUDMAC, we also had a bug fix where Renesas controller would sleep in atomic context while doing DMA transfers from a tasklet. There were also a set of minor cleanups. The FSL UDC also had a scheduling in atomic context bug fix, but that's all. Thanks to Sebastian, the dummy_hcd now works better than ever with support for scatterlists and streams. Sebastian also added SuperSpeed descriptors to the serial gadgets. The highlight on this merge is the addition of a generic API for mapping and unmapping usb_requests. This will avoid code duplication on all UDC controllers and also kills all the defines for DMA_ADDR_INVALID which UDC controllers sprinkled around. A few of the UDC controllers were already converted to use this new API. Conflicts: drivers/usb/dwc3/gadget.c
Diffstat (limited to 'drivers/usb/gadget/langwell_udc.c')
-rw-r--r--drivers/usb/gadget/langwell_udc.c46
1 files changed, 8 insertions, 38 deletions
diff --git a/drivers/usb/gadget/langwell_udc.c b/drivers/usb/gadget/langwell_udc.c
index 42a88b680f25..edd52d963f14 100644
--- a/drivers/usb/gadget/langwell_udc.c
+++ b/drivers/usb/gadget/langwell_udc.c
@@ -401,16 +401,7 @@ static void done(struct langwell_ep *ep, struct langwell_request *req,
dma_pool_free(dev->dtd_pool, curr_dtd, curr_dtd->dtd_dma);
}
- if (req->mapped) {
- dma_unmap_single(&dev->pdev->dev,
- req->req.dma, req->req.length,
- is_in(ep) ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
- req->req.dma = DMA_ADDR_INVALID;
- req->mapped = 0;
- } else
- dma_sync_single_for_cpu(&dev->pdev->dev, req->req.dma,
- req->req.length,
- is_in(ep) ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
+ usb_gadget_unmap_request(&dev->gadget, &req->req, is_in(ep));
if (status != -ESHUTDOWN)
dev_dbg(&dev->pdev->dev,
@@ -487,6 +478,7 @@ static int langwell_ep_disable(struct usb_ep *_ep)
nuke(ep, -ESHUTDOWN);
ep->desc = NULL;
+ ep->ep.desc = NULL;
ep->stopped = 1;
spin_unlock_irqrestore(&dev->lock, flags);
@@ -749,7 +741,8 @@ static int langwell_ep_queue(struct usb_ep *_ep, struct usb_request *_req,
struct langwell_ep *ep;
struct langwell_udc *dev;
unsigned long flags;
- int is_iso = 0, zlflag = 0;
+ int is_iso = 0;
+ int ret;
/* always require a cpu-view buffer */
req = container_of(_req, struct langwell_request, req);
@@ -776,33 +769,10 @@ static int langwell_ep_queue(struct usb_ep *_ep, struct usb_request *_req,
if (unlikely(!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN))
return -ESHUTDOWN;
- /* set up dma mapping in case the caller didn't */
- if (_req->dma == DMA_ADDR_INVALID) {
- /* WORKAROUND: WARN_ON(size == 0) */
- if (_req->length == 0) {
- dev_vdbg(&dev->pdev->dev, "req->length: 0->1\n");
- zlflag = 1;
- _req->length++;
- }
-
- _req->dma = dma_map_single(&dev->pdev->dev,
- _req->buf, _req->length,
- is_in(ep) ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
- if (zlflag && (_req->length == 1)) {
- dev_vdbg(&dev->pdev->dev, "req->length: 1->0\n");
- zlflag = 0;
- _req->length = 0;
- }
-
- req->mapped = 1;
- dev_vdbg(&dev->pdev->dev, "req->mapped = 1\n");
- } else {
- dma_sync_single_for_device(&dev->pdev->dev,
- _req->dma, _req->length,
- is_in(ep) ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
- req->mapped = 0;
- dev_vdbg(&dev->pdev->dev, "req->mapped = 0\n");
- }
+ /* set up dma mapping */
+ ret = usb_gadget_map_request(&dev->gadget, &req->req, is_in(ep));
+ if (ret)
+ return ret;
dev_dbg(&dev->pdev->dev,
"%s queue req %p, len %u, buf %p, dma 0x%08x\n",