xHCI: Adding #define values used for hub descriptor

xhci-hub used some numerical values for initialisation of root hub
descriptors. #define values are addded in usb 2.0 hub specification
file and these values are used for root hub characteristics
initialisation.

Also use some #defines in places where magic numbers are being used.

Signed-off-by: Aman Deep <amandeep3986@gmail.com>
Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index 430e88f..35e257f 100644 (file)
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -57,17 +57,15 @@ static void xhci_common_hub_descriptor(struct xhci_hcd *xhci,
        desc->bHubContrCurrent = 0;
 
        desc->bNbrPorts = ports;
-       /* Ugh, these should be #defines, FIXME */
-       /* Using table 11-13 in USB 2.0 spec. */
        temp = 0;
-       /* Bits 1:0 - support port power switching, or power always on */
+       /* Bits 1:0 - support per-port power switching, or power always on */
        if (HCC_PPC(xhci->hcc_params))
-               temp |= 0x0001;
+               temp |= HUB_CHAR_INDV_PORT_LPSM;
        else
-               temp |= 0x0002;
+               temp |= HUB_CHAR_NO_LPSM;
        /* Bit  2 - root hubs are not part of a compound device */
        /* Bits 4:3 - individual port over current protection */
-       temp |= 0x0008;
+       temp |= HUB_CHAR_INDV_PORT_OCPM;
        /* Bits 6:5 - no TTs in root ports */
        /* Bit  7 - no port indicators */
        desc->wHubCharacteristics = cpu_to_le16(temp);
@@ -86,9 +84,9 @@ static void xhci_usb2_hub_descriptor(struct usb_hcd *hcd, struct xhci_hcd *xhci,
        ports = xhci->num_usb2_ports;
 
        xhci_common_hub_descriptor(xhci, desc, ports);
-       desc->bDescriptorType = 0x29;
+       desc->bDescriptorType = USB_DT_HUB;
        temp = 1 + (ports / 8);
-       desc->bDescLength = 7 + 2 * temp;
+       desc->bDescLength = USB_DT_HUB_NONVAR_SIZE + 2 * temp;
 
        /* The Device Removable bits are reported on a byte granularity.
         * If the port doesn't exist within that byte, the bit is set to 0.
@@ -137,8 +135,8 @@ static void xhci_usb3_hub_descriptor(struct usb_hcd *hcd, struct xhci_hcd *xhci,
 
        ports = xhci->num_usb3_ports;
        xhci_common_hub_descriptor(xhci, desc, ports);
-       desc->bDescriptorType = 0x2a;
-       desc->bDescLength = 12;
+       desc->bDescriptorType = USB_DT_SS_HUB;
+       desc->bDescLength = USB_DT_SS_HUB_SIZE;
 
        /* header decode latency should be zero for roothubs,
         * see section 4.23.5.2.

diff --git a/include/linux/usb/ch11.h b/include/linux/usb/ch11.h
index 4ebaf08..55e7325 100644 (file)
--- a/include/linux/usb/ch11.h
+++ b/include/linux/usb/ch11.h
@@ -165,11 +165,20 @@ struct usb_port_status {
  * wHubCharacteristics (masks)
  * See USB 2.0 spec Table 11-13, offset 3
  */
-#define HUB_CHAR_LPSM          0x0003 /* D1 .. D0 */
-#define HUB_CHAR_COMPOUND      0x0004 /* D2       */
-#define HUB_CHAR_OCPM          0x0018 /* D4 .. D3 */
-#define HUB_CHAR_TTTT           0x0060 /* D6 .. D5 */
-#define HUB_CHAR_PORTIND        0x0080 /* D7       */
+#define HUB_CHAR_LPSM          0x0003 /* Logical Power Switching Mode mask */
+#define HUB_CHAR_COMMON_LPSM   0x0000 /* All ports power control at once */
+#define HUB_CHAR_INDV_PORT_LPSM        0x0001 /* per-port power control */
+#define HUB_CHAR_NO_LPSM       0x0002 /* no power switching */
+
+#define HUB_CHAR_COMPOUND      0x0004 /* hub is part of a compound device */
+
+#define HUB_CHAR_OCPM          0x0018 /* Over-Current Protection Mode mask */
+#define HUB_CHAR_COMMON_OCPM   0x0000 /* All ports Over-Current reporting */
+#define HUB_CHAR_INDV_PORT_OCPM        0x0008 /* per-port Over-current reporting */
+#define HUB_CHAR_NO_OCPM       0x0010 /* No Over-current Protection support */
+
+#define HUB_CHAR_TTTT          0x0060 /* TT Think Time mask */
+#define HUB_CHAR_PORTIND       0x0080 /* per-port indicators (LEDs) */
 
 struct usb_hub_status {
        __le16 wHubStatus;