USB 3.1 adds different types of Get Port Status request.
The Get Extended Port Status request returns 4 additional bytes
after the normal portstatus and portchange words containing
link speed and lane information about a connected enhanced super
speed device
Signed-off-by: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>
---
drivers/usb/host/xhci-hub.c | 29 +++++++++++++++++++++++++++++
drivers/usb/host/xhci.h | 4 ++++
2 files changed, 33 insertions(+)
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index a4d429c..5d2d7e9 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -659,6 +659,22 @@ static void xhci_del_comp_mod_timer(struct xhci_hcd *xhci, u32 status,
}
}
+static u32 xhci_get_ext_port_status(u32 raw_port_status, u32 port_li)
+{
+ u32 ext_stat = 0;
+ int speed_id;
+
+ /* only support rx and tx lane counts of 1 in usb3.1 spec */
+ speed_id = DEV_PORT_SPEED(raw_port_status);
+ ext_stat |= speed_id; /* bits 3:0, RX speed id */
+ ext_stat |= speed_id << 4; /* bits 7:4, TX speed id */
+
+ ext_stat |= PORT_RX_LANES(port_li) << 8; /* bits 11:8 Rx lane count */
+ ext_stat |= PORT_TX_LANES(port_li) << 12; /* bits 15:12 Tx lane count */
+
+ return ext_stat;
+}
+
/*
* Converts a raw xHCI port status into the format that external USB 2.0 or USB
* 3.0 hubs use.
@@ -874,6 +890,19 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
xhci_dbg(xhci, "Get port status returned 0x%x\n", status);
put_unaligned(cpu_to_le32(status), (__le32 *) buf);
+ /* if USB 3.1 extended port status return additional 4 bytes */
+ if (wValue == 0x02) {
+ u32 port_li;
+
+ if (hcd->speed < HCD_USB31 || wLength != 8) {
+ xhci_err(xhci, "get ext port status invalid parameter\n");
+ retval = -EINVAL;
+ break;
+ }
+ port_li = readl(port_array[wIndex] + PORTLI);
+ status = xhci_get_ext_port_status(temp, port_li);
+ put_unaligned_le32(cpu_to_le32(status), &buf[4]);
+ }
break;
case SetPortFeature:
if (wValue == USB_PORT_FEAT_LINK_STATE)
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index e2c76e2..51093df 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -335,6 +335,7 @@ struct xhci_op_regs {
#define DEV_SUPERSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_SS)
#define DEV_SUPERSPEEDPLUS(p) (((p) & DEV_SPEED_MASK) == XDEV_SSP)
#define DEV_SUPERSPEED_ANY(p) (((p) & DEV_SPEED_MASK) >= XDEV_SS)
+#define DEV_PORT_SPEED(p) (((p) >> 10) & 0x0f)
/* Bits 20:23 in the Slot Context are the speed for the device */
#define SLOT_SPEED_FS (XDEV_FS << 10)
@@ -419,6 +420,9 @@ struct xhci_op_regs {
#define PORT_L1DS(p) (((p) & 0xff) << 8)
#define PORT_HLE (1 << 16)
+/* USB3 Protocol PORTLI Port Link Information */
+#define PORT_RX_LANES(p) (((p) >> 16) & 0xf)
+#define PORT_TX_LANES(p) (((p) >> 20) & 0xf)
/* USB2 Protocol PORTHLPMC */
#define PORT_HIRDM(p)((p) & 3)
--
1.9.1
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