summaryrefslogtreecommitdiff
path: root/packages/linux/linux-omap-2.6.27/musb-dma-iso-in.eml
blob: 56fc827a5dda2b55b2bc52e83387f75360bf8e2f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
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;
--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html