Add new USB code

* Create usb directory
* Remove compilation of slof-usb code
* Generalize pci-class_0c.fs
* Add usb-static.fs with alias and dummy usb-scan

Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Acked-by: Thomas Huth <thuth@linux.vnet.ibm.com>

board-qemu/Makefile

@@ -14,7 +14,7 @@ BOARD_TARGETS = tools_build romfs_build clients_build netdrivers stage1 subdirs
 
 SUBDIRS = slof veth virtio-net
 
-COMMON_LIBS = libc libbootmsg libbases libnvram libelf libhvcall libvirtio
+COMMON_LIBS = libc libbootmsg libbases libnvram libelf libhvcall libvirtio libusb
 
 all: $(BOARD_TARGETS)
 	$(MAKE) boot_rom.bin

slof/fs/devices/pci-class_0c.fs

@@ -14,23 +14,31 @@ s" serial bus [ " type my-space pci-class-name type s"  ]" type cr
 
 my-space pci-device-generic-setup
 
-
 \ Handle USB OHCI controllers:
-: handle-usb-ohci-class  ( -- )
+: handle-usb-class  ( -- )
    \ set Memory Write and Invalidate Enable, SERR# Enable
    \ (see PCI 3.0 Spec Chapter 6.2.2 device control):
    4 config-w@ 110 or 4 config-w!
    pci-master-enable               \ set PCI Bus master bit and
    pci-mem-enable                  \ memory space enable for USB scan
-   \ Create an alias for this controller:
-   set-ohci-alias
 ;
 
 \ Check PCI sub-class and interface type of Serial Bus Controller
 \ to include the appropriate driver:
 : handle-sbc-subclass  ( -- )
-   my-space pci-class@ ffff and CASE         \ get PCI sub-class and interface
-      0310 OF handle-usb-ohci-class ENDOF    \ USB OHCI controller
+    my-space pci-class@ ffff and CASE         \ get PCI sub-class and interface
+	0310 OF                      \ OHCI controller
+	    handle-usb-class
+	    set-ohci-alias
+	ENDOF
+	0320 OF                      \ EHCI controller
+	    handle-usb-class
+	    set-ehci-alias
+	ENDOF
+	0330 OF                      \ XHCI controller
+	    handle-usb-class
+	    set-xhci-alias
+	ENDOF
    ENDCASE
 ;
 

slof/fs/usb/usb-static.fs

@@ -9,5 +9,36 @@
 \ * Contributors:
 \ *     IBM Corporation - initial implementation
 \ ****************************************************************************/
-: usb-scan
+
+\ register device alias
+: do-alias-setting ( num name-str name-len )
+   rot $cathex strdup            \ create alias name
+   get-node node>path            \ get path string
+   set-alias                     \ and set the alias
+;
+
+0 VALUE ohci-alias-num
+0 VALUE ehci-alias-num
+0 VALUE xhci-alias-num
+
+\ create a new ohci device alias for the current node
+: set-ohci-alias  (  -- )
+    ohci-alias-num dup 1+ TO ohci-alias-num    ( num )
+    s" ohci" do-alias-setting
+;
+
+\ create a new ehci device alias for the current node
+: set-ehci-alias  (  -- )
+    ehci-alias-num dup 1+ TO ehci-alias-num    ( num )
+    s" ehci" do-alias-setting
+;
+
+\ create a new xhci device alias for the current node
+: set-xhci-alias  (  -- )
+    xhci-alias-num dup 1+ TO xhci-alias-num    ( num )
+    s" xhci" do-alias-setting
+;
+
+: usb-scan ( -- )
+    ." Scanning USB " cr
 ;