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path: root/drivers/usb/host/ehci-hcd.c
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Diffstat (limited to 'drivers/usb/host/ehci-hcd.c')
-rw-r--r--drivers/usb/host/ehci-hcd.c26
1 files changed, 19 insertions, 7 deletions
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 1e5a6e2..bf02221 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -1214,6 +1214,7 @@ static int _ehci_submit_control_msg(struct usb_device *dev, unsigned long pipe,
struct int_queue {
int elementsize;
+ unsigned long pipe;
struct QH *first;
struct QH *current;
struct QH *last;
@@ -1269,7 +1270,7 @@ static struct int_queue *_ehci_create_int_queue(struct usb_device *dev,
{
struct ehci_ctrl *ctrl = ehci_get_ctrl(dev);
struct int_queue *result = NULL;
- int i;
+ uint32_t i, toggle;
/*
* Interrupt transfers requiring several transactions are not supported
@@ -1309,6 +1310,7 @@ static struct int_queue *_ehci_create_int_queue(struct usb_device *dev,
goto fail1;
}
result->elementsize = elementsize;
+ result->pipe = pipe;
result->first = memalign(USB_DMA_MINALIGN,
sizeof(struct QH) * queuesize);
if (!result->first) {
@@ -1326,6 +1328,8 @@ static struct int_queue *_ehci_create_int_queue(struct usb_device *dev,
memset(result->first, 0, sizeof(struct QH) * queuesize);
memset(result->tds, 0, sizeof(struct qTD) * queuesize);
+ toggle = usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
+
for (i = 0; i < queuesize; i++) {
struct QH *qh = result->first + i;
struct qTD *td = result->tds + i;
@@ -1357,7 +1361,9 @@ static struct int_queue *_ehci_create_int_queue(struct usb_device *dev,
td->qt_altnext = cpu_to_hc32(QT_NEXT_TERMINATE);
debug("communication direction is '%s'\n",
usb_pipein(pipe) ? "in" : "out");
- td->qt_token = cpu_to_hc32((elementsize << 16) |
+ td->qt_token = cpu_to_hc32(
+ QT_TOKEN_DT(toggle) |
+ (elementsize << 16) |
((usb_pipein(pipe) ? 1 : 0) << 8) | /* IN/OUT token */
0x80); /* active */
td->qt_buffer[0] =
@@ -1372,6 +1378,7 @@ static struct int_queue *_ehci_create_int_queue(struct usb_device *dev,
cpu_to_hc32((td->qt_buffer[0] + 0x4000) & ~0xfff);
*buf = buffer + i * elementsize;
+ toggle ^= 1;
}
flush_dcache_range((unsigned long)buffer,
@@ -1426,6 +1433,8 @@ static void *_ehci_poll_int_queue(struct usb_device *dev,
{
struct QH *cur = queue->current;
struct qTD *cur_td;
+ uint32_t token, toggle;
+ unsigned long pipe = queue->pipe;
/* depleted queue */
if (cur == NULL) {
@@ -1436,12 +1445,15 @@ static void *_ehci_poll_int_queue(struct usb_device *dev,
cur_td = &queue->tds[queue->current - queue->first];
invalidate_dcache_range((unsigned long)cur_td,
ALIGN_END_ADDR(struct qTD, cur_td, 1));
- if (QT_TOKEN_GET_STATUS(hc32_to_cpu(cur_td->qt_token)) &
- QT_TOKEN_STATUS_ACTIVE) {
- debug("Exit poll_int_queue with no completed intr transfer. token is %x\n",
- hc32_to_cpu(cur_td->qt_token));
+ token = hc32_to_cpu(cur_td->qt_token);
+ if (QT_TOKEN_GET_STATUS(token) & QT_TOKEN_STATUS_ACTIVE) {
+ debug("Exit poll_int_queue with no completed intr transfer. token is %x\n", token);
return NULL;
}
+
+ toggle = QT_TOKEN_GET_DT(token);
+ usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), toggle);
+
if (!(cur->qh_link & QH_LINK_TERMINATE))
queue->current++;
else
@@ -1452,7 +1464,7 @@ static void *_ehci_poll_int_queue(struct usb_device *dev,
queue->elementsize));
debug("Exit poll_int_queue with completed intr transfer. token is %x at %p (first at %p)\n",
- hc32_to_cpu(cur_td->qt_token), cur, queue->first);
+ token, cur, queue->first);
return cur->buffer;
}