platform: msm_shared: Update the SuperSpeed max packet size
As per the SS specs the max packet size for SS is 1024 Bytes. some of
the hosts treat the end point config as invalid if bulk packet size
from the device is advertised as < 1024 bytes. Update the end point
descriptors with 1024 bytes as max packet size when the connect done
event is received with SS speed mode.
Change-Id: If35692f598e57d4eb349cb69293e7bb185126137
diff --git a/platform/msm_shared/usb30_udc.c b/platform/msm_shared/usb30_udc.c
index 6192899..cf27db9 100644
--- a/platform/msm_shared/usb30_udc.c
+++ b/platform/msm_shared/usb30_udc.c
@@ -73,6 +73,10 @@
#define EPT_TX(n) (1 << ((n) + 16))
#define EPT_RX(n) (1 << (n))
+/* Macro for bulk SS EP descriptors */
+#define EP_BULK_IN_INDEX 21
+#define EP_BULK_OUT_INDEX 34
+
/* Local functions */
static struct udc_descriptor *udc_descriptor_alloc(uint32_t type,
uint32_t num,
@@ -677,9 +681,11 @@
break;
default:
- ERR("\n Unknown setup req.\n type = 0x%x value = %d index = %d"
+ /* some of the requests from host are not handled, add a debug
+ * for the command not being handled, this is not fatal
+ */
+ DBG("\n Unknown setup req.\n type = 0x%x value = %d index = %d"
" length = %d\n", s.type, s.value, s.index, s.length);
- ASSERT(0);
}
stall:
@@ -751,10 +757,44 @@
return ret;
}
+static void udc_update_ep_desc(udc_t *udc, uint16_t max_pkt_sz_bulk)
+{
+ struct udc_descriptor *desc= NULL;
+ struct udc_endpoint *ept = NULL;
+
+ /*
+ * By default the bulk EP are registered with 512 Bytes
+ * as the max packet size. As per SS spec the max packet
+ * size for bulk is 1024. Some hosts treat the descriptor
+ * as invalid if the packet size is < 1024. Update the
+ * descriptors once we are notifed with SS connect event
+ */
+ for (desc = udc->desc_list; desc; desc = desc->next)
+ {
+ if (desc->data[EP_BULK_IN_INDEX] == EP_TYPE_BULK)
+ {
+ desc->data[EP_BULK_IN_INDEX + 1] = max_pkt_sz_bulk;
+ desc->data[EP_BULK_IN_INDEX + 2] = max_pkt_sz_bulk >> 8;
+ }
+
+ if (desc->data[EP_BULK_OUT_INDEX] == EP_TYPE_BULK)
+ {
+ desc->data[EP_BULK_OUT_INDEX + 1] = max_pkt_sz_bulk;
+ desc->data[EP_BULK_OUT_INDEX + 2] = max_pkt_sz_bulk >> 8;
+ }
+ }
+
+ for (ept = udc->ept_list; ept; ept = ept->next)
+ {
+ ept->maxpkt = max_pkt_sz_bulk;
+ }
+}
+
/* callback function called by dwc layer if any dwc event occurs */
void udc_dwc_notify(void *context, dwc_notify_event_t event)
{
udc_t *udc = (udc_t *) context;
+ uint32_t max_pkt_size = 0;
switch (event)
{
@@ -763,12 +803,27 @@
break;
case DWC_NOTIFY_EVENT_CONNECTED_FS:
udc->speed = UDC_SPEED_FS;
+ /* For FS connection update the ep descriptor
+ * with FS max packet size
+ */
+ max_pkt_size = 64;
+ udc_update_ep_desc(udc, max_pkt_size);
break;
case DWC_NOTIFY_EVENT_CONNECTED_HS:
udc->speed = UDC_SPEED_HS;
+ /* For HS connection update the ep descriptor
+ * with HS max packet size
+ */
+ max_pkt_size = 512;
+ udc_update_ep_desc(udc, max_pkt_size);
break;
case DWC_NOTIFY_EVENT_CONNECTED_SS:
udc->speed = UDC_SPEED_SS;
+ /* For SS connection update the ep descriptor
+ * with SS max packet size
+ */
+ max_pkt_size = 1024;
+ udc_update_ep_desc(udc, max_pkt_size);
break;
case DWC_NOTIFY_EVENT_DISCONNECTED:
case DWC_NOTIFY_EVENT_OFFLINE: