mail archive of the barebox mailing list
 help / color / mirror / Atom feed
* [PATCH v2] ehci-hcd: preserve DTC in QH for interrupt transactions
@ 2016-03-09 10:50 Aleksey Kuleshov
  2016-03-10  9:02 ` Sascha Hauer
  0 siblings, 1 reply; 2+ messages in thread
From: Aleksey Kuleshov @ 2016-03-09 10:50 UTC (permalink / raw)
  To: barebox; +Cc: Aleksey Kuleshov

In Linux ehci-q Data Toggle Control bit for interrupt transactions
is preserved in Queue Head (EHCI 3.6.2). So don't set 14's bit in
qh_endpt1 and don't manage toggle bit anywhere in int transactions.

This fixes an idle issue for USB keyboards, where keys
were physically changed but barebox haven't seen them in polling
until the next USB keyboard polling occurs.

Signed-off-by: Aleksey Kuleshov <rndfax@yandex.ru>
---
 drivers/usb/host/ehci-hcd.c | 13 ++-----------
 1 file changed, 2 insertions(+), 11 deletions(-)

diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 9c8613c..b0bf922 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -1005,7 +1005,7 @@ static struct int_queue *ehci_create_int_queue(struct usb_device *dev,
 	struct usb_host *host = dev->host;
 	struct ehci_priv *ehci = to_ehci(host);
 	struct int_queue *result = NULL;
-	uint32_t i, toggle;
+	uint32_t i;
 	struct QH *list = ehci->periodic_queue;
 
 	/*
@@ -1057,8 +1057,6 @@ 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;
@@ -1073,7 +1071,6 @@ static struct int_queue *ehci_create_int_queue(struct usb_device *dev,
 		qh->qh_endpt1 =
 			cpu_to_hc32((0 << 28) | /* No NAK reload (ehci 4.9) */
 			(usb_maxpacket(dev, pipe) << 16) | /* MPS */
-			(1 << 14) |
 			QH_ENDPT1_EPS(ehci_encode_speed(dev->speed)) |
 			(usb_pipeendpoint(pipe) << 8) | /* Endpoint Number */
 			(usb_pipedevice(pipe) << 0));
@@ -1092,7 +1089,6 @@ static struct int_queue *ehci_create_int_queue(struct usb_device *dev,
 			"communication direction is '%s'\n",
 			usb_pipein(pipe) ? "in" : "out");
 		td->qt_token = cpu_to_hc32(
-			QT_TOKEN_DT(toggle) |
 			(elementsize << 16) |
 			((usb_pipein(pipe) ? 1 : 0) << 8) | /* IN/OUT token */
 			0x80); /* active */
@@ -1108,7 +1104,6 @@ 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;
 	}
 
 	if (ehci->periodic_schedules > 0) {
@@ -1144,8 +1139,7 @@ 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;
+	uint32_t token;
 
 	/* depleted queue */
 	if (cur == NULL) {
@@ -1162,9 +1156,6 @@ static void *ehci_poll_int_queue(struct usb_device *dev,
 		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
-- 
2.6.2


_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox

^ permalink raw reply	[flat|nested] 2+ messages in thread

end of thread, other threads:[~2016-03-10  9:02 UTC | newest]

Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2016-03-09 10:50 [PATCH v2] ehci-hcd: preserve DTC in QH for interrupt transactions Aleksey Kuleshov
2016-03-10  9:02 ` Sascha Hauer

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox