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path: root/recipes/linux/linux-omap-pm/musb-support-high-bandwidth.patch.eml
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Enables support for camera (as creative) requiring high bandwidth
isochronous transfer.

Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
---
 drivers/usb/musb/musb_core.c |   18 +++++++++---------
 drivers/usb/musb/musb_host.c |   32 +++++++++++++++++++++-----------
 2 files changed, 30 insertions(+), 20 deletions(-)

diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index c939f81..9914f70 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -1063,17 +1063,17 @@ static struct fifo_cfg __initdata mode_4_cfg[] = {
 { .hw_ep_num =  7, .style = FIFO_TX,   .maxpacket = 512, },
 { .hw_ep_num =  7, .style = FIFO_RX,   .maxpacket = 512, },
 { .hw_ep_num =  8, .style = FIFO_TX,   .maxpacket = 512, },
-{ .hw_ep_num =  8, .style = FIFO_RX,   .maxpacket = 512, },
+{ .hw_ep_num =  8, .style = FIFO_RX,   .maxpacket =  64, },
 { .hw_ep_num =  9, .style = FIFO_TX,   .maxpacket = 512, },
-{ .hw_ep_num =  9, .style = FIFO_RX,   .maxpacket = 512, },
+{ .hw_ep_num =  9, .style = FIFO_RX,   .maxpacket =  64, },
 { .hw_ep_num = 10, .style = FIFO_TX,   .maxpacket = 512, },
-{ .hw_ep_num = 10, .style = FIFO_RX,   .maxpacket = 512, },
-{ .hw_ep_num = 11, .style = FIFO_TX,   .maxpacket = 512, },
-{ .hw_ep_num = 11, .style = FIFO_RX,   .maxpacket = 512, },
-{ .hw_ep_num = 12, .style = FIFO_TX,   .maxpacket = 512, },
-{ .hw_ep_num = 12, .style = FIFO_RX,   .maxpacket = 512, },
-{ .hw_ep_num = 13, .style = FIFO_TX,   .maxpacket = 512, },
-{ .hw_ep_num = 13, .style = FIFO_RX,   .maxpacket = 512, },
+{ .hw_ep_num = 10, .style = FIFO_RX,   .maxpacket =  64, },
+{ .hw_ep_num = 11, .style = FIFO_TX,   .maxpacket = 256, },
+{ .hw_ep_num = 11, .style = FIFO_RX,   .maxpacket = 256, },
+{ .hw_ep_num = 12, .style = FIFO_TX,   .maxpacket = 256, },
+{ .hw_ep_num = 12, .style = FIFO_RX,   .maxpacket = 256, },
+{ .hw_ep_num = 13, .style = FIFO_TX,   .maxpacket = 256, },
+{ .hw_ep_num = 13, .style = FIFO_RX,   .maxpacket = 4096, },
 { .hw_ep_num = 14, .style = FIFO_RXTX, .maxpacket = 1024, },
 { .hw_ep_num = 15, .style = FIFO_RXTX, .maxpacket = 1024, },
 };
diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
index 08e421f..84173df 100644
--- a/drivers/usb/musb/musb_host.c
+++ b/drivers/usb/musb/musb_host.c
@@ -1443,6 +1443,10 @@ void musb_host_rx(struct musb *musb, u8 epnum)
 			/* packet error reported later */
 			iso_err = true;
 		}
+	} else if (rx_csr & MUSB_RXCSR_INCOMPRX) {
+		DBG(3, "end %d Highbandwidth  incomplete ISO packet received\n"
+					, epnum);
+		status = -EPROTO;
 	}
 
 	/* faults abort the transfer */
@@ -1595,7 +1599,13 @@ void musb_host_rx(struct musb *musb, u8 epnum)
 				val &= ~MUSB_RXCSR_H_AUTOREQ;
 			else
 				val |= MUSB_RXCSR_H_AUTOREQ;
-			val |= MUSB_RXCSR_AUTOCLEAR | MUSB_RXCSR_DMAENAB;
+
+			if (qh->maxpacket & ~0x7ff)
+				/* Autoclear doesn't work in high bandwidth iso */
+				val |= MUSB_RXCSR_DMAENAB;
+			else
+				val |= MUSB_RXCSR_AUTOCLEAR
+					| MUSB_RXCSR_DMAENAB;
 
 			musb_writew(epio, MUSB_RXCSR,
 				MUSB_RXCSR_H_WZC_BITS | val);
@@ -1666,6 +1676,7 @@ static int musb_schedule(
 	int			best_end, epnum;
 	struct musb_hw_ep	*hw_ep = NULL;
 	struct list_head	*head = NULL;
+	u16 			maxpacket;
 
 	/* use fixed hardware for control and bulk */
 	switch (qh->type) {
@@ -1708,6 +1719,13 @@ static int musb_schedule(
 	best_diff = 4096;
 	best_end = -1;
 
+	if (qh->maxpacket & (1<<11))
+		maxpacket = 2 * (qh->maxpacket & 0x7ff);
+	else if (qh->maxpacket & (1<<12))
+		maxpacket = 3 * (qh->maxpacket & 0x7ff);
+	else
+		maxpacket = (qh->maxpacket & 0x7ff);
+
 	for (epnum = 1; epnum < musb->nr_endpoints; epnum++) {
 		int	diff;
 
@@ -1718,9 +1736,9 @@ static int musb_schedule(
 			continue;
 
 		if (is_in)
-			diff = hw_ep->max_packet_sz_rx - qh->maxpacket;
+			diff = hw_ep->max_packet_sz_rx - maxpacket;
 		else
-			diff = hw_ep->max_packet_sz_tx - qh->maxpacket;
+			diff = hw_ep->max_packet_sz_tx - maxpacket;
 
 		if (diff > 0 && best_diff > diff) {
 			best_diff = diff;
@@ -1797,13 +1815,6 @@ static int musb_urb_enqueue(
 	qh->is_ready = 1;
 
 	qh->maxpacket = le16_to_cpu(epd->wMaxPacketSize);
-
-	/* no high bandwidth support yet */
-	if (qh->maxpacket & ~0x7ff) {
-		ret = -EMSGSIZE;
-		goto done;
-	}
-
 	qh->epnum = epd->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
 	qh->type = epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
 
@@ -1897,7 +1908,6 @@ static int musb_urb_enqueue(
 	}
 	spin_unlock_irqrestore(&musb->lock, flags);
 
-done:
 	if (ret != 0) {
 		usb_hcd_unlink_urb_from_ep(hcd, urb);
 		kfree(qh);
-- 
1.5.6

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