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authorFelipe Balbi <felipe.balbi@linux.intel.com>2017-01-26 11:17:37 +0200
committerFelipe Balbi <felipe.balbi@linux.intel.com>2017-01-26 11:17:37 +0200
commite42a5dbb8a3d14f5a35bffa3bf7dcb87883f767a (patch)
tree8444c587ac4351063297e0c07969980c0b63bae7 /drivers/usb/dwc3/host.c
parent4fe160d51e4226a80f81b3d9b5193e0b8d2ebcbd (diff)
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usb: dwc3: host: pass quirk-broken-port-ped property for known broken revisions
dwc3 revisions <=3.00a have a limitation where Port Disable command doesn't work. Set the quirk-broken-port-ped property for such controllers so XHCI core can do the necessary workaround. [rogerq@ti.com] Updated code from platform data to device property. Signed-off-by: Roger Quadros <rogerq@ti.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb/dwc3/host.c')
-rw-r--r--drivers/usb/dwc3/host.c21
1 files changed, 18 insertions, 3 deletions
diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c
index 487f0ff6ae25..76f0b0df37c1 100644
--- a/drivers/usb/dwc3/host.c
+++ b/drivers/usb/dwc3/host.c
@@ -54,11 +54,12 @@ out:
int dwc3_host_init(struct dwc3 *dwc)
{
- struct property_entry props[2];
+ struct property_entry props[3];
struct platform_device *xhci;
int ret, irq;
struct resource *res;
struct platform_device *dwc3_pdev = to_platform_device(dwc->dev);
+ int prop_idx = 0;
irq = dwc3_host_get_irq(dwc);
if (irq < 0)
@@ -97,8 +98,22 @@ int dwc3_host_init(struct dwc3 *dwc)
memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props));
- if (dwc->usb3_lpm_capable) {
- props[0].name = "usb3-lpm-capable";
+ if (dwc->usb3_lpm_capable)
+ props[prop_idx++].name = "usb3-lpm-capable";
+
+ /**
+ * WORKAROUND: dwc3 revisions <=3.00a have a limitation
+ * where Port Disable command doesn't work.
+ *
+ * The suggested workaround is that we avoid Port Disable
+ * completely.
+ *
+ * This following flag tells XHCI to do just that.
+ */
+ if (dwc->revision <= DWC3_REVISION_300A)
+ props[prop_idx++].name = "quirk-broken-port-ped";
+
+ if (prop_idx) {
ret = platform_device_add_properties(xhci, props);
if (ret) {
dev_err(dwc->dev, "failed to add properties to xHCI\n");