add usbDsGetSpeed and missing speed enum entries. (#676)

Author: ITotalJustice

nx/include/switch/services/usbds.h

@@ -55,6 +55,8 @@ typedef enum {
 } UsbComplexId;
 
 typedef enum {
+    UsbDeviceSpeed_None = 0x0,
+    UsbDeviceSpeed_Low = 0x1,   ///< USB 1.0 Low Speed
     UsbDeviceSpeed_Full = 0x2,  ///< USB 1.1 Full Speed
     UsbDeviceSpeed_High = 0x3,  ///< USB 2.0 High Speed
     UsbDeviceSpeed_Super = 0x4, ///< USB 3.0 Super Speed
@@ -119,6 +121,9 @@ Result usbDsEnable(void);
 /// Only available on [5.0.0+].
 Result usbDsDisable(void);
 
+/// Only available on [8.0.0+].
+Result usbDsGetSpeed(UsbDeviceSpeed *out);
+
 ///@}
 
 ///@name IDsInterface
@@ -158,4 +163,3 @@ Result usbDsEndpoint_Stall(UsbDsEndpoint* endpoint);
 Result usbDsEndpoint_SetZlt(UsbDsEndpoint* endpoint, bool zlt); // Sets Zero Length Termination for endpoint
 
 ///@}
-

nx/source/services/usbds.c

@@ -558,6 +558,14 @@ Result usbDsDisable(void) {
     return _usbDsCmdNoIO(&g_usbDsSrv, hosversionAtLeast(11,0,0) ? 10 : 11);
 }
 
+Result usbDsGetSpeed(UsbDeviceSpeed *out) {
+    if (hosversionBefore(8,0,0))
+        return MAKERESULT(Module_Libnx, LibnxError_IncompatSysVer);
+
+    _Static_assert(sizeof(*out) == sizeof(u32));
+    return _usbDsCmdNoInOutU32(&g_usbDsSrv, (u32*)out, hosversionAtLeast(11,0,0) ? 11 : 12);
+}
+
 
 //IDsInterface
 
@@ -729,4 +737,3 @@ Result usbDsEndpoint_SetZlt(UsbDsEndpoint* endpoint, bool zlt) {
 
     return _usbDsCmdInBoolNoOut(&endpoint->s, zlt, 5);
 }
-