---

yaml
---
r: 265023
b: refs/heads/master
c: fc71ff7
h: refs/heads/master
i:
  265021: 7a42a12
  265019: 9e0d1e8
  265015: debbf58
  265007: 126da4c
  264991: 125b331
  264959: 5257f87
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 6fd4562178508a0949c9fdecd8558d8b10d671bd
+refs/heads/master: fc71ff7583b14347fa1cb592b698f088ecff36e3

trunk/drivers/usb/host/xhci-ext-caps.h

@@ -65,6 +65,12 @@
 /* bits 1:2, 5:12, and 17:19 need to be preserved; bits 21:28 should be zero */
 #define	XHCI_LEGACY_DISABLE_SMI		((0x3 << 1) + (0xff << 5) + (0x7 << 17))
 
+/* USB 2.0 xHCI 0.96 L1C capability - section 7.2.2.1.3.2 */
+#define XHCI_L1C               (1 << 16)
+
+/* USB 2.0 xHCI 1.0 hardware LMP capability - section 7.2.2.1.3.2 */
+#define XHCI_HLC               (1 << 19)
+
 /* command register values to disable interrupts and halt the HC */
 /* start/stop HC execution - do not write unless HC is halted*/
 #define XHCI_CMD_RUN		(1 << 0)

trunk/drivers/usb/host/xhci-mem.c

@@ -1959,6 +1959,23 @@ static void xhci_add_in_port(struct xhci_hcd *xhci, unsigned int num_ports,
 	if (port_offset == 0 || (port_offset + port_count - 1) > num_ports)
 		/* WTF? "Valid values are ‘1’ to MaxPorts" */
 		return;
+
+	/* Check the host's USB2 LPM capability */
+	if ((xhci->hci_version == 0x96) && (major_revision != 0x03) &&
+			(temp & XHCI_L1C)) {
+		xhci_dbg(xhci, "xHCI 0.96: support USB2 software lpm\n");
+		xhci->sw_lpm_support = 1;
+	}
+
+	if ((xhci->hci_version >= 0x100) && (major_revision != 0x03)) {
+		xhci_dbg(xhci, "xHCI 1.0: support USB2 software lpm\n");
+		xhci->sw_lpm_support = 1;
+		if (temp & XHCI_HLC) {
+			xhci_dbg(xhci, "xHCI 1.0: support USB2 hardware lpm\n");
+			xhci->hw_lpm_support = 1;
+		}
+	}
+
 	port_offset--;
 	for (i = port_offset; i < (port_offset + port_count); i++) {
 		/* Duplicate entry.  Ignore the port if the revisions differ. */

trunk/drivers/usb/host/xhci.h

@@ -1459,6 +1459,10 @@ struct xhci_hcd {
 	/* Array of pointers to USB 2.0 PORTSC registers */
 	__le32 __iomem		**usb2_ports;
 	unsigned int		num_usb2_ports;
+	/* support xHCI 0.96 spec USB2 software LPM */
+	unsigned		sw_lpm_support:1;
+	/* support xHCI 1.0 spec USB2 hardware LPM */
+	unsigned		hw_lpm_support:1;
 };
 
 /* convert between an HCD pointer and the corresponding EHCI_HCD */