commit b23c843992b659d537514e6493d673284f5d6724
author Paul Zimmerman <Paul.Zimmerman@synopsys.com> Fri Sep 30 10:58:42 2011 +0300
committer Greg Kroah-Hartman <gregkh@suse.de> Tue Oct 04 10:25:52 2011 -0700
tree d5bec8c89888dd1d4b6ea58ec39211d92a1528e3
parent 49a25cc9a7effe2993e65229c2ea0be726919bcf

usb: dwc3: gadget: fix DEPSTARTCFG for non-EP0 EPs

DEPSTARTCFG for non-EP0 EPs must only be sent once per config

[ balbi@ti.com : changed config_start to start_config_issued ]

Signed-off-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/dwc3/core.h

diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 0231eba..502582c 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -529,6 +529,7 @@
  * @ep0_status_pending: ep0 status response without a req is pending
  * @ep0_bounced: true when we used bounce buffer
  * @ep0_expect_in: true when we expect a DATA IN transfer
+ * @start_config_issued: true when StartConfig command has been issued
  * @ep0_next_event: hold the next expected event
  * @ep0state: state of endpoint zero
  * @link_state: link state
@@ -576,6 +577,7 @@
 	unsigned		ep0_status_pending:1;
 	unsigned		ep0_bounced:1;
 	unsigned		ep0_expect_in:1;
+	unsigned		start_config_issued:1;
 
 	enum dwc3_ep0_next	ep0_next_event;
 	enum dwc3_ep0_state	ep0state;

drivers/usb/dwc3/ep0.c

diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c
index cc27c4e..2def48e 100644
--- a/drivers/usb/dwc3/ep0.c
+++ b/drivers/usb/dwc3/ep0.c
@@ -455,6 +455,7 @@
 	u32 cfg;
 	int ret;
 
+	dwc->start_config_issued = false;
 	cfg = le16_to_cpu(ctrl->wValue);
 
 	switch (dwc->dev_state) {

drivers/usb/dwc3/gadget.c

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index b2820aa..9c0174a 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -237,8 +237,12 @@
 	if (dep->number != 1) {
 		cmd = DWC3_DEPCMD_DEPSTARTCFG;
 		/* XferRscIdx == 0 for ep0 and 2 for the remaining */
-		if (dep->number > 1)
+		if (dep->number > 1) {
+			if (dwc->start_config_issued)
+				return 0;
+			dwc->start_config_issued = true;
 			cmd |= DWC3_DEPCMD_PARAM(2);
+		}
 
 		return dwc3_send_gadget_ep_cmd(dwc, 0, cmd, &params);
 	}
@@ -1161,6 +1165,8 @@
 	reg |= DWC3_DCFG_SUPERSPEED;
 	dwc3_writel(dwc->regs, DWC3_DCFG, reg);
 
+	dwc->start_config_issued = false;
+
 	/* Start with SuperSpeed Default */
 	dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512);
 
@@ -1592,6 +1598,7 @@
 
 	dwc3_stop_active_transfers(dwc);
 	dwc3_disconnect_gadget(dwc);
+	dwc->start_config_issued = false;
 
 	dwc->gadget.speed = USB_SPEED_UNKNOWN;
 }
@@ -1643,6 +1650,7 @@
 
 	dwc3_stop_active_transfers(dwc);
 	dwc3_clear_stall_all_ep(dwc);
+	dwc->start_config_issued = false;
 
 	/* Reset device address to zero */
 	reg = dwc3_readl(dwc->regs, DWC3_DCFG);