if (!(reg & DWC3_DEPCMD_CMDACT)) {
dev_vdbg(dwc->dev, "Command Complete --> %d\n",
DWC3_DEPCMD_STATUS(reg));
+ if (DWC3_DEPCMD_STATUS(reg))
+ return -EINVAL;
return 0;
}
dep->trb_pool_dma = 0;
}
+static int dwc3_gadget_set_xfer_resource(struct dwc3 *dwc, struct dwc3_ep *dep);
+
+/**
+ * dwc3_gadget_start_config - Configure EP resources
+ * @dwc: pointer to our controller context structure
+ * @dep: endpoint that is being enabled
+ *
+ * The assignment of transfer resources cannot perfectly follow the
+ * data book due to the fact that the controller driver does not have
+ * all knowledge of the configuration in advance. It is given this
+ * information piecemeal by the composite gadget framework after every
+ * SET_CONFIGURATION and SET_INTERFACE. Trying to follow the databook
+ * programming model in this scenario can cause errors. For two
+ * reasons:
+ *
+ * 1) The databook says to do DEPSTARTCFG for every SET_CONFIGURATION
+ * and SET_INTERFACE (8.1.5). This is incorrect in the scenario of
+ * multiple interfaces.
+ *
+ * 2) The databook does not mention doing more DEPXFERCFG for new
+ * endpoint on alt setting (8.1.6).
+ *
+ * The following simplified method is used instead:
+ *
+ * All hardware endpoints can be assigned a transfer resource and this
+ * setting will stay persistent until either a core reset or
+ * hibernation. So whenever we do a DEPSTARTCFG(0) we can go ahead and
+ * do DEPXFERCFG for every hardware endpoint as well. We are
+ * guaranteed that there are as many transfer resources as endpoints.
+ *
+ * This function is called for each endpoint when it is being enabled
+ * but is triggered only when called for EP0-out, which always happens
+ * first, and which should only happen in one of the above conditions.
+ */
static int dwc3_gadget_start_config(struct dwc3 *dwc, struct dwc3_ep *dep)
{
struct dwc3_gadget_ep_cmd_params params;
u32 cmd;
+ int i;
+ int ret;
+
+ if (dep->number)
+ return 0;
memset(¶ms, 0x00, sizeof(params));
+ cmd = DWC3_DEPCMD_DEPSTARTCFG;
- if (dep->number != 1) {
- cmd = DWC3_DEPCMD_DEPSTARTCFG;
- /* XferRscIdx == 0 for ep0 and 2 for the remaining */
- if (dep->number > 1) {
- if (dwc->start_config_issued)
- return 0;
- dwc->start_config_issued = true;
- cmd |= DWC3_DEPCMD_PARAM(2);
- }
+ ret = dwc3_send_gadget_ep_cmd(dwc, 0, cmd, ¶ms);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < DWC3_ENDPOINTS_NUM; i++) {
+ struct dwc3_ep *dep = dwc->eps[i];
+
+ if (!dep)
+ continue;
- return dwc3_send_gadget_ep_cmd(dwc, 0, cmd, ¶ms);
+ ret = dwc3_gadget_set_xfer_resource(dwc, dep);
+ if (ret)
+ return ret;
}
return 0;
struct dwc3_trb_hw *trb_link_hw;
struct dwc3_trb trb_link;
- ret = dwc3_gadget_set_xfer_resource(dwc, dep);
- if (ret)
- return ret;
-
dep->desc = desc;
dep->type = usb_endpoint_type(desc);
dep->flags |= DWC3_EP_ENABLED;
switch (usb_endpoint_type(desc)) {
case USB_ENDPOINT_XFER_CONTROL:
- strncat(dep->name, "-control", sizeof(dep->name));
+ strlcat(dep->name, "-control", sizeof(dep->name));
break;
case USB_ENDPOINT_XFER_ISOC:
- strncat(dep->name, "-isoc", sizeof(dep->name));
+ strlcat(dep->name, "-isoc", sizeof(dep->name));
break;
case USB_ENDPOINT_XFER_BULK:
- strncat(dep->name, "-bulk", sizeof(dep->name));
+ strlcat(dep->name, "-bulk", sizeof(dep->name));
break;
case USB_ENDPOINT_XFER_INT:
- strncat(dep->name, "-int", sizeof(dep->name));
+ strlcat(dep->name, "-int", sizeof(dep->name));
break;
default:
dev_err(dwc->dev, "invalid endpoint transfer type\n");
memset(¶ms, 0x00, sizeof(params));
if (value) {
+ if (dep->flags & DWC3_EP_STALL)
+ return 0;
+
if (dep->number == 0 || dep->number == 1) {
/*
* Whenever EP0 is stalled, we will restart
else
dep->flags |= DWC3_EP_STALL;
} else {
- if (dep->flags & DWC3_EP_WEDGE)
+ if (!(dep->flags & DWC3_EP_STALL))
return 0;
ret = dwc3_send_gadget_ep_cmd(dwc, dep->number,
value ? "set" : "clear",
dep->name);
else
- dep->flags &= ~DWC3_EP_STALL;
+ dep->flags &= ~(DWC3_EP_STALL | DWC3_EP_WEDGE);
}
return ret;
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);
__dwc3_gadget_ep_disable(dwc->eps[0]);
err0:
+ dwc->gadget_driver = NULL;
spin_unlock_irqrestore(&dwc->lock, flags);
return ret;
if (epnum == 0 || epnum == 1) {
dep->endpoint.maxpacket = 512;
+ dep->endpoint.maxburst = 1;
dep->endpoint.ops = &dwc3_gadget_ep0_ops;
if (!epnum)
dwc->gadget.ep0 = &dep->endpoint;
for (epnum = 0; epnum < DWC3_ENDPOINTS_NUM; epnum++) {
dep = dwc->eps[epnum];
- dwc3_free_trb_pool(dep);
-
- if (epnum != 0 && epnum != 1)
+ /*
+ * Physical endpoints 0 and 1 are special; they form the
+ * bi-directional USB endpoint 0.
+ *
+ * For those two physical endpoints, we don't allocate a TRB
+ * pool nor do we add them the endpoints list. Due to that, we
+ * shouldn't do these two operations otherwise we would end up
+ * with all sorts of bugs when removing dwc3.ko.
+ */
+ if (epnum != 0 && epnum != 1) {
+ dwc3_free_trb_pool(dep);
list_del(&dep->endpoint.ep_list);
+ }
kfree(dep);
}
static void dwc3_gadget_start_isoc(struct dwc3 *dwc,
struct dwc3_ep *dep, const struct dwc3_event_depevt *event)
{
- u32 uf;
+ u32 uf, mask;
if (list_empty(&dep->request_list)) {
dev_vdbg(dwc->dev, "ISOC ep %s run out for requests.\n",
return;
}
- if (event->parameters) {
- u32 mask;
-
- mask = ~(dep->interval - 1);
- uf = event->parameters & mask;
- /* 4 micro frames in the future */
- uf += dep->interval * 4;
- } else {
- uf = 0;
- }
+ mask = ~(dep->interval - 1);
+ uf = event->parameters & mask;
+ /* 4 micro frames in the future */
+ uf += dep->interval * 4;
__dwc3_gadget_kick_transfer(dep, uf, 1);
}
dwc3_stop_active_transfers(dwc);
dwc3_disconnect_gadget(dwc);
- dwc->start_config_issued = false;
dwc->gadget.speed = USB_SPEED_UNKNOWN;
}
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);
git.openpandora.org / pandora-kernel.git / blobdiff