Usb Stack: only setup packet handling, and not enabled by default as there is a lot to do.

* settings code is not fully ready -> changing device driver has no effect
* clean ups
* check copyriths
* find a way to detect IN transfers
* support for full and highspeed
* ...




git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14470 a1c6a512-1295-4272-9138-f99709370657

firmware/usbstack/core/epsetup.c

@@ -0,0 +1,186 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id: $
+ *
+ * Copyright (C) 2007 by Christian Gmeiner
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#include <string.h>
+#include <ctype.h>
+#include "usbstack/core.h"
+
+/**
+ * 
+ * Naming Convention for Endpoint Names
+ * 
+ *	- ep1, ep2, ... address is fixed, not direction or type
+ *	- ep1in, ep2out, ... address and direction are fixed, not type
+ *	- ep1-bulk, ep2-bulk, ... address and type are fixed, not direction
+ *	- ep1in-bulk, ep2out-iso, ... all three are fixed
+ *	- ep-* ... no functionality restrictions
+ *
+ * Type suffixes are "-bulk", "-iso", or "-int".  Numbers are decimal.
+ *
+ */
+static int ep_matches(struct usb_ep* ep, struct usb_endpoint_descriptor* desc);
+
+void usb_ep_autoconfig_reset(void) {
+
+    struct usb_ep* ep = NULL;
+    if (usbcore.active_controller == NULL) {
+        return;
+    }
+	
+    logf("resetting endpoints");
+    list_for_each_entry(ep, &usbcore.active_controller->endpoints.list, list) {
+    	logf("reset %s", ep->name);
+        ep->claimed = false;
+    }
+}
+
+/**
+ * Find a suitable endpoint for the requested endpoint descriptor.
+ * @param desc usb descritpro to use for seraching.
+ * @return NULL or a valid endpoint.
+ */
+struct usb_ep* usb_ep_autoconfig(struct usb_endpoint_descriptor* desc) {
+
+	struct usb_ep* ep = NULL;
+    if (usbcore.active_controller == NULL) {
+    	logf("active controller NULL");
+        return NULL;
+    }
+        
+    list_for_each_entry(ep, &usbcore.active_controller->endpoints.list, list) {
+        if (ep_matches (ep, desc)) {
+            return ep;
+        }
+    }
+    
+    return NULL;
+}
+
+static int ep_matches(struct usb_ep* ep, struct usb_endpoint_descriptor* desc) {
+	
+    uint8_t     type;
+	const char* tmp;
+	uint16_t    max;
+
+	/* endpoint already claimed? */
+	if (ep->claimed) {
+		logf("!! claimed !!");
+        return 0;
+    }
+
+    /* only support ep0 for portable CONTROL traffic */
+    type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
+    if (type == USB_ENDPOINT_XFER_CONTROL) {
+    	logf("type == control");
+        return 0;
+    }
+
+    /* some other naming convention */
+    if (ep->name[0] != 'e') {
+    	logf("wrong name");
+        return 0;
+    }
+    
+    /* type-restriction:  "-iso", "-bulk", or "-int".
+     * direction-restriction:  "in", "out".
+     */
+    if (ep->name[2] != '-' ) {
+        tmp = strrchr (ep->name, '-');
+        if (tmp) {
+            switch (type) {
+            case USB_ENDPOINT_XFER_INT:
+                /* bulk endpoints handle interrupt transfers,
+                 * except the toggle-quirky iso-synch kind
+                 */
+                if (tmp[2] == 's') { // == "-iso"
+                    return 0;
+                }
+				break;
+	        case USB_ENDPOINT_XFER_BULK:
+	            if (tmp[1] != 'b') { // != "-bulk"
+	                return 0;
+	            }
+	            break;
+	        case USB_ENDPOINT_XFER_ISOC:
+	            if (tmp[2] != 's') { // != "-iso"
+	                return 0;
+	            }
+	        }
+        } else {
+            tmp = ep->name + strlen (ep->name);
+	    }
+
+        /* direction-restriction:  "..in-..", "out-.." */
+        tmp--;
+        if (!isdigit(*tmp)) {
+            if (desc->bEndpointAddress & USB_DIR_IN) {
+                if ('n' != *tmp) {
+                    return 0;
+			    }
+            } else {
+                if ('t' != *tmp) {
+                    return 0;
+                }
+            }
+        }
+    }
+
+
+    /* endpoint maxpacket size is an input parameter, except for bulk
+     * where it's an output parameter representing the full speed limit.
+     * the usb spec fixes high speed bulk maxpacket at 512 bytes.
+     */
+    max = 0x7ff & desc->wMaxPacketSize;
+    
+    switch (type) {
+    case USB_ENDPOINT_XFER_INT:
+        /* INT:  limit 64 bytes full speed, 1024 high speed */
+    	if ((usbcore.active_controller->speed != USB_SPEED_HIGH) && (max > 64)) {
+            return 0;
+        }
+		/* FALLTHROUGH */
+
+	case USB_ENDPOINT_XFER_ISOC:
+        if ((usbcore.active_controller->speed != USB_SPEED_HIGH) && (max > 1023)) {
+            return 0;
+        }
+		break;
+	}
+
+	/* MATCH!! */
+
+	/* report address */
+    desc->bEndpointAddress |= ep->ep_num;
+
+    /* report (variable) full speed bulk maxpacket */
+    if (type == USB_ENDPOINT_XFER_BULK) {
+    	int size = max;
+
+        /* min() doesn't work on bitfields with gcc-3.5 */
+        if (size > 64) {
+            size = 64;
+	    }
+        desc->wMaxPacketSize = size;
+    }
+
+    /* save desc in endpoint */
+    ep->desc = desc;
+    
+    return 1;
+}