linux-omap: add recipe to build 2.6.27

1 files changed, 138 insertions, 0 deletions

diff --git a/packages/linux/linux-omap-2.6.27/musb-dma-iso-in.eml b/packages/linux/linux-omap-2.6.27/musb-dma-iso-in.eml
new file mode 100644
index 0000000000..56fc827a5d
--- /dev/null
+++ b/packages/linux/linux-omap-2.6.27/musb-dma-iso-in.eml
@@ -0,0 +1,138 @@
+Fixes blurred capture images in dma mode. Isochronous error field in
+urb and source data buffer pointer were not updated properly in dma
+mode.
+
+Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
+---
+diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
+index 08e421f..a481d54 100644
+--- a/drivers/usb/musb/musb_host.c
++++ b/drivers/usb/musb/musb_host.c
+@@ -1505,10 +1505,29 @@ void musb_host_rx(struct musb *musb, u8 epnum)
+ 		musb_writew(hw_ep->regs, MUSB_RXCSR, val);
+ 
+ #ifdef CONFIG_USB_INVENTRA_DMA
++		if (usb_pipeisoc(pipe)) {
++			struct usb_iso_packet_descriptor *d;
++
++			d = urb->iso_frame_desc + qh->iso_idx;
++			d->actual_length = xfer_len;
++
++			/* even if there was an error, we did the dma
++			 * for iso_frame_desc->length
++			 */
++			if (d->status != EILSEQ && d->status != -EOVERFLOW)
++				d->status = 0;
++
++			if (++qh->iso_idx >= urb->number_of_packets)
++				done = true;
++			else
++				done = false;
++
++		} else  {
+ 		/* done if urb buffer is full or short packet is recd */
+ 		done = (urb->actual_length + xfer_len >=
+ 				urb->transfer_buffer_length
+ 			|| dma->actual_len < qh->maxpacket);
++		}
+ 
+ 		/* send IN token for next packet, without AUTOREQ */
+ 		if (!done) {
+@@ -1545,7 +1564,8 @@ void musb_host_rx(struct musb *musb, u8 epnum)
+ 		if (dma) {
+ 			struct dma_controller	*c;
+ 			u16			rx_count;
+-			int			ret;
++			int			ret, length;
++			dma_addr_t		buf;
+ 
+ 			rx_count = musb_readw(epio, MUSB_RXCOUNT);
+ 
+@@ -1558,6 +1578,35 @@ void musb_host_rx(struct musb *musb, u8 epnum)
+ 
+ 			c = musb->dma_controller;
+ 
++			if (usb_pipeisoc(pipe)) {
++				int status = 0;
++				struct usb_iso_packet_descriptor *d;
++
++				d = urb->iso_frame_desc + qh->iso_idx;
++
++				if (iso_err) {
++					status = -EILSEQ;
++					urb->error_count++;
++				}
++				if (rx_count > d->length) {
++					if (status == 0) {
++						status = -EOVERFLOW;
++						urb->error_count++;
++					}
++					DBG(2, "** OVERFLOW %d into %d\n",\
++					    rx_count, d->length);
++
++					length = d->length;
++				} else
++					length = rx_count;
++				d->status = status;
++				buf = urb->transfer_dma + d->offset;
++			} else {
++				length = rx_count;
++				buf = urb->transfer_dma +
++						urb->actual_length;
++			}
++
+ 			dma->desired_mode = 0;
+ #ifdef USE_MODE1
+ 			/* because of the issue below, mode 1 will
+@@ -1569,6 +1618,12 @@ void musb_host_rx(struct musb *musb, u8 epnum)
+ 						urb->actual_length)
+ 					> qh->maxpacket)
+ 				dma->desired_mode = 1;
++			if (rx_count < hw_ep->max_packet_sz_rx) {
++				length = rx_count;
++				dma->bDesiredMode = 0;
++			} else {
++				length = urb->transfer_buffer_length;
++			}
+ #endif
+ 
+ /* Disadvantage of using mode 1:
+@@ -1606,12 +1661,7 @@ void musb_host_rx(struct musb *musb, u8 epnum)
+ 			 */
+ 			ret = c->channel_program(
+ 				dma, qh->maxpacket,
+-				dma->desired_mode,
+-				urb->transfer_dma
+-					+ urb->actual_length,
+-				(dma->desired_mode == 0)
+-					? rx_count
+-					: urb->transfer_buffer_length);
++				dma->desired_mode, buf, length);
+ 
+ 			if (!ret) {
+ 				c->channel_release(dma);
+@@ -1628,19 +1678,6 @@ void musb_host_rx(struct musb *musb, u8 epnum)
+ 		}
+ 	}
+ 
+-	if (dma && usb_pipeisoc(pipe)) {
+-		struct usb_iso_packet_descriptor	*d;
+-		int					iso_stat = status;
+-
+-		d = urb->iso_frame_desc + qh->iso_idx;
+-		d->actual_length += xfer_len;
+-		if (iso_err) {
+-			iso_stat = -EILSEQ;
+-			urb->error_count++;
+-		}
+-		d->status = iso_stat;
+-	}
+-
+ finish:
+ 	urb->actual_length += xfer_len;
+ 	qh->offset += xfer_len;
+--
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