usb: chipidea: big-endian support
Convert between big-endian and little-endian format when accessing the usb
controller structures which are little-endian by specification.
Fix cases where the little-endian memory layout is taken for granted.
The patch doesn't have any effect on the already supported little-endian
architectures.
Signed-off-by: Svetoslav Neykov <svetoslav@neykov.name>
[Alex: minor cosmetic fixes]
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
index 32e6c99..ff393e1 100644
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -404,10 +404,10 @@
return -ENOMEM;
memset(mReq->zptr, 0, sizeof(*mReq->zptr));
- mReq->zptr->next = TD_TERMINATE;
- mReq->zptr->token = TD_STATUS_ACTIVE;
+ mReq->zptr->next = cpu_to_le32(TD_TERMINATE);
+ mReq->zptr->token = cpu_to_le32(TD_STATUS_ACTIVE);
if (!mReq->req.no_interrupt)
- mReq->zptr->token |= TD_IOC;
+ mReq->zptr->token |= cpu_to_le32(TD_IOC);
}
ret = usb_gadget_map_request(&ci->gadget, &mReq->req, mEp->dir);
if (ret)
@@ -418,32 +418,35 @@
* TODO - handle requests which spawns into several TDs
*/
memset(mReq->ptr, 0, sizeof(*mReq->ptr));
- mReq->ptr->token = length << __ffs(TD_TOTAL_BYTES);
- mReq->ptr->token &= TD_TOTAL_BYTES;
- mReq->ptr->token |= TD_STATUS_ACTIVE;
+ mReq->ptr->token = cpu_to_le32(length << __ffs(TD_TOTAL_BYTES));
+ mReq->ptr->token &= cpu_to_le32(TD_TOTAL_BYTES);
+ mReq->ptr->token |= cpu_to_le32(TD_STATUS_ACTIVE);
if (mReq->zptr) {
- mReq->ptr->next = mReq->zdma;
+ mReq->ptr->next = cpu_to_le32(mReq->zdma);
} else {
- mReq->ptr->next = TD_TERMINATE;
+ mReq->ptr->next = cpu_to_le32(TD_TERMINATE);
if (!mReq->req.no_interrupt)
- mReq->ptr->token |= TD_IOC;
+ mReq->ptr->token |= cpu_to_le32(TD_IOC);
}
- mReq->ptr->page[0] = mReq->req.dma;
- for (i = 1; i < 5; i++)
- mReq->ptr->page[i] =
- (mReq->req.dma + i * CI13XXX_PAGE_SIZE) & ~TD_RESERVED_MASK;
+ mReq->ptr->page[0] = cpu_to_le32(mReq->req.dma);
+ for (i = 1; i < 5; i++) {
+ u32 page = mReq->req.dma + i * CI13XXX_PAGE_SIZE;
+ page &= ~TD_RESERVED_MASK;
+ mReq->ptr->page[i] = cpu_to_le32(page);
+ }
if (!list_empty(&mEp->qh.queue)) {
struct ci13xxx_req *mReqPrev;
int n = hw_ep_bit(mEp->num, mEp->dir);
int tmp_stat;
+ u32 next = mReq->dma & TD_ADDR_MASK;
mReqPrev = list_entry(mEp->qh.queue.prev,
struct ci13xxx_req, queue);
if (mReqPrev->zptr)
- mReqPrev->zptr->next = mReq->dma & TD_ADDR_MASK;
+ mReqPrev->zptr->next = cpu_to_le32(next);
else
- mReqPrev->ptr->next = mReq->dma & TD_ADDR_MASK;
+ mReqPrev->ptr->next = cpu_to_le32(next);
wmb();
if (hw_read(ci, OP_ENDPTPRIME, BIT(n)))
goto done;
@@ -457,9 +460,9 @@
}
/* QH configuration */
- mEp->qh.ptr->td.next = mReq->dma; /* TERMINATE = 0 */
- mEp->qh.ptr->td.token &= ~TD_STATUS; /* clear status */
- mEp->qh.ptr->cap |= QH_ZLT;
+ mEp->qh.ptr->td.next = cpu_to_le32(mReq->dma); /* TERMINATE = 0 */
+ mEp->qh.ptr->td.token &= cpu_to_le32(~TD_STATUS); /* clear status */
+ mEp->qh.ptr->cap |= cpu_to_le32(QH_ZLT);
wmb(); /* synchronize before ep prime */
@@ -481,11 +484,11 @@
if (mReq->req.status != -EALREADY)
return -EINVAL;
- if ((TD_STATUS_ACTIVE & mReq->ptr->token) != 0)
+ if ((cpu_to_le32(TD_STATUS_ACTIVE) & mReq->ptr->token) != 0)
return -EBUSY;
if (mReq->zptr) {
- if ((TD_STATUS_ACTIVE & mReq->zptr->token) != 0)
+ if ((cpu_to_le32(TD_STATUS_ACTIVE) & mReq->zptr->token) != 0)
return -EBUSY;
dma_pool_free(mEp->td_pool, mReq->zptr, mReq->zdma);
mReq->zptr = NULL;
@@ -495,7 +498,7 @@
usb_gadget_unmap_request(&mEp->ci->gadget, &mReq->req, mEp->dir);
- mReq->req.status = mReq->ptr->token & TD_STATUS;
+ mReq->req.status = le32_to_cpu(mReq->ptr->token) & TD_STATUS;
if ((TD_STATUS_HALTED & mReq->req.status) != 0)
mReq->req.status = -1;
else if ((TD_STATUS_DT_ERR & mReq->req.status) != 0)
@@ -503,7 +506,7 @@
else if ((TD_STATUS_TR_ERR & mReq->req.status) != 0)
mReq->req.status = -1;
- mReq->req.actual = mReq->ptr->token & TD_TOTAL_BYTES;
+ mReq->req.actual = le32_to_cpu(mReq->ptr->token) & TD_TOTAL_BYTES;
mReq->req.actual >>= __ffs(TD_TOTAL_BYTES);
mReq->req.actual = mReq->req.length - mReq->req.actual;
mReq->req.actual = mReq->req.status ? 0 : mReq->req.actual;
@@ -1004,15 +1007,15 @@
mEp->qh.ptr->cap = 0;
if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
- mEp->qh.ptr->cap |= QH_IOS;
+ mEp->qh.ptr->cap |= cpu_to_le32(QH_IOS);
else if (mEp->type == USB_ENDPOINT_XFER_ISOC)
- mEp->qh.ptr->cap &= ~QH_MULT;
+ mEp->qh.ptr->cap &= cpu_to_le32(~QH_MULT);
else
- mEp->qh.ptr->cap &= ~QH_ZLT;
+ mEp->qh.ptr->cap &= cpu_to_le32(~QH_ZLT);
- mEp->qh.ptr->cap |=
- (mEp->ep.maxpacket << __ffs(QH_MAX_PKT)) & QH_MAX_PKT;
- mEp->qh.ptr->td.next |= TD_TERMINATE; /* needed? */
+ mEp->qh.ptr->cap |= cpu_to_le32((mEp->ep.maxpacket << __ffs(QH_MAX_PKT))
+ & QH_MAX_PKT);
+ mEp->qh.ptr->td.next |= cpu_to_le32(TD_TERMINATE); /* needed? */
/*
* Enable endpoints in the HW other than ep0 as ep0