+/*
+ * Copyright (c) 2006, Benedikt Sauter <sauter@ixbat.de>
+ * All rights reserved.
+ *
+ * Short descripton of file:
+ *
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ * with the distribution.
+ * * Neither the name of the FH Augsburg nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+//#include <stdlib.h>
+#include "core.h"
+#include "../host/host.h"
+#include "usb.h"
+#include "../usbspec/usb11spec.h"
+#include "../lib/list.h"
+#include "../../malloc.h"
+
+/**
+ * Initialize USB stack.
+ */
+void usb_init()
+{
+ core.drivers = list_create();
+ core.devices = list_create();
+ core.nextaddress = 1;
+ hcdi_init();
+}
+
+/**
+ * Get next free usb device address.
+ */
+u8 usb_next_address()
+{
+ u8 addr = core.nextaddress;
+ core.nextaddress++;
+ return addr;
+}
+
+
+/**
+ * Call this function periodically for
+ * control and transfer management.
+ */
+void usb_periodic()
+{
+ // call ever registered driver
+ usb_driver *drv;
+ element *iterator = core.drivers->head;
+ while (iterator != NULL) {
+ drv = (usb_driver *) iterator->data;
+ drv->check();
+ iterator = iterator->next;
+ }
+}
+
+
+/**
+ * Enumerate new device and create data structures
+ * for the core. usb_add_device expected that
+ * the device answers to address zero.
+ */
+usb_device *usb_add_device()
+{
+ usb_device *dev = (usb_device *) malloc(sizeof(usb_device));
+ dev->address = 0;
+ dev->bMaxPacketSize0 = 8; /* send at first time only 8 bytes */
+
+ dev->epSize[0] = 64;
+ dev->epSize[1] = 64;
+ dev->epSize[2] = 64;
+
+ dev->epTogl[0] = 0;
+ dev->epTogl[1] = 0;
+ dev->epTogl[2] = 0;
+
+ char buf[64];
+ u8 devdescr_size;
+ u8 address = usb_next_address();
+
+ /* ask first 8 bytes of device descriptor with this special
+ * GET Descriptor Request, when device address = 0
+ */
+ usb_control_msg(dev, 0x80, GET_DESCRIPTOR, 1, 0, 64, buf, 8, 0);
+
+ dev->bMaxPacketSize0 = (u8) buf[7]; /* setup real ep0 fifo size */
+ devdescr_size = (u8) buf[0]; /* save real length of device descriptor */
+
+ /* define new adress */
+ usb_control_msg(dev, 0x00, SET_ADDRESS, address << 8, 0, 0, buf, 8, 0);
+ dev->address = address;
+
+ /* get complete device descriptor */
+ usb_control_msg(dev, 0x80, GET_DESCRIPTOR, 1, 0, devdescr_size, buf, 8,
+ 0);
+
+ /* save only really neccessary values for this small usbstack */
+ dev->bDeviceClass = (u8) buf[4];
+ dev->bDeviceSubClass = (u8) buf[5];
+ dev->bDeviceProtocoll = (u8) buf[6];
+ dev->idVendor = (u16) (buf[9] << 8) | (buf[8]);
+ dev->idProduct = (u16) (buf[11] << 8) | (buf[10]);
+ dev->bcdDevice = (u16) (buf[13] << 8) | (buf[12]);
+
+ // string descriptoren werden nicht im arbeitsspeicher gehalten -> on demand mit
+ // entprechenden funktionen
+ // hier muss man noch mehr abholen, konfigurationene, interfaces und endpunkte
+
+ /* add device to device list */
+ element *tmp = (element *) malloc(sizeof(element));
+ tmp->data = (void *) dev;
+ list_add_tail(core.devices, tmp);
+
+ usb_probe_driver();
+
+ return dev;
+}
+
+/**
+ * Find currently detached device and remove
+ * data structures
+ */
+u8 usb_remove_device(usb_device * dev)
+{
+ // FIXME!!!! dieser quatsch ist nur temporaer
+ free(core.devices->head);
+ free(core.devices);
+ core.devices = list_create();
+ return 1;
+}
+
+/**
+ * Register new driver at usb stack.
+ */
+u8 usb_register_driver(usb_driver * dev)
+{
+ /* add driver to driver list */
+ element *tmp = (element *) malloc(sizeof(element));
+ tmp->data = (void *) dev;
+ tmp->next = NULL;
+ list_add_tail(core.drivers, tmp);
+
+
+ /**
+ * first check to find a suitable device
+ * (root hub drivers need this call here)
+ */
+ dev->probe();
+
+ return 1;
+}
+
+
+/**
+ * Call every probe function from every registered
+ * driver, to check if there is a valid driver
+ * for the new device.
+ */
+void usb_probe_driver()
+{
+ // call ever registered driver
+ usb_driver *drv;
+ element *iterator = core.drivers->head;
+ while (iterator != NULL) {
+ drv = (usb_driver *) iterator->data;
+ drv->probe();
+ iterator = iterator->next;
+ }
+}
+
+/**
+ * Not implemented.
+ */
+usb_irp *usb_get_irp()
+{
+ return 0;
+}
+
+/**
+ * Not implemented.
+ */
+u8 usb_remove_irp(usb_irp * irp)
+{
+
+ return 1;
+}
+
+/**
+ * Takes usb_irp and split it into
+ * several usb packeges (SETUP,IN,OUT)
+ * In the usbstack they are transported with the
+ * usb_transfer_descriptor data structure.
+ */
+u16 usb_submit_irp(usb_irp * irp)
+{
+ usb_transfer_descriptor *td;
+ u8 runloop = 1;
+ u16 restlength = irp->len;
+ char *td_buf_ptr = irp->buffer;
+
+ //u8 togl=irp->dev->epTogl[(irp->endpoint & 0x7F)];
+ u8 togl = irp->dev->epTogl[(irp->endpoint & 0x7F)];
+ //u8 togl=0;
+
+ switch (irp->type) {
+ case USB_CTRL:
+
+ /* alle requests mit dem gleichen algorithmus zerteilen
+ * das einzige ist der spezielle get_Device_descriptor request
+ * bei dem eine laenge von 64 angegeben ist.
+ * wenn man an adresse 0 einen get_device_desciptor schickt
+ * dann reichen die ersten 8 byte.
+ */
+
+ /***************** Setup Stage ***********************/
+ td = usb_create_transfer_descriptor(irp);
+ td->pid = USB_PID_SETUP;
+ td->buffer = irp->buffer;
+ td->actlen = 8; /* control message are always 8 bytes */
+
+ togl = 0;
+ td->togl = togl; /* start with data0 */
+ if (togl == 0)
+ togl = 1;
+ else
+ togl = 0;
+ /**** send token ****/
+ hcdi_enqueue(td);
+
+ /***************** Data Stage ***********************/
+ /**
+ * You can see at bit 7 of bmRequestType if this stage is used,
+ * default requests are always 8 byte greate, from
+ * host to device. Stage 3 is only neccessary if the request
+ * expected datas from the device.
+ * bit7 - 1 = from device to host -> yes we need data stage
+ * bit7 - 0 = from host to device -> no send zero packet
+ *
+ * nach einem setup token kann nur ein IN token in stage 3 folgen
+ * nie aber ein OUT. Ein Zero OUT wird nur als Bestaetigung benoetigt.
+ *
+ *
+ * bit7 = 1
+ * Device to Host
+ * - es kommen noch Daten mit PID_IN an
+ * - host beendet mit PID_OUT DATA1 Zero
+ * bit7 - 0
+ * Host zu Device (wie set address)
+ * - device sendet ein PID_IN DATA1 Zero Packet als bestaetigung
+ */
+ usb_device_request *setup = (usb_device_request *) irp->buffer;
+ u8 bmRequestType = setup->bmRequestType;
+
+ if (bmRequestType & 0x80) { /* check bit 7 of bmRequestType */
+
+ /* schleife die die tds generiert */
+ while (runloop) {
+ td = usb_create_transfer_descriptor(irp);
+ td->actlen = irp->epsize;
+ /* stop loop if all bytes are send */
+ if (restlength <= irp->epsize) {
+ runloop = 0;
+ td->actlen = restlength;
+ }
+
+ td->buffer = td_buf_ptr;
+ /* move pointer for next packet */
+ td_buf_ptr = td_buf_ptr + irp->epsize;
+
+ td->pid = USB_PID_IN;
+ td->togl = togl;
+ if (togl == 0)
+ togl = 1;
+ else
+ togl = 0;
+
+ /* wenn device descriptor von adresse 0 angefragt wird werden nur
+ * die ersten 8 byte abgefragt
+ */
+ if (setup->bRequest == GET_DESCRIPTOR && (setup->wValue >> 8) == 1
+ && td->devaddress == 0) {
+ runloop = 0; /* stop loop */
+ }
+
+ /**** send token ****/
+ hcdi_enqueue(td);
+
+ /* pruefe ob noch weitere Pakete vom Device abgeholt werden muessen */
+ restlength = restlength - irp->epsize;
+ }
+ }
+
+
+
+
+ /***************** Status Stage ***********************/
+ /* Zero packet for end */
+ td = usb_create_transfer_descriptor(irp);
+ td->togl = 1; /* zero data packet = always DATA1 packet */
+ td->actlen = 0;
+ td->buffer = NULL;
+
+ /**
+ * bit7 = 1, host beendet mit PID_OUT DATA1 Zero
+ * bit7 = 0, device sendet ein PID_IN DATA1 Zero Packet als bestaetigung
+ */
+ if (bmRequestType & 0x80) { /* check bit 7 of bmRequestType */
+ td->pid = USB_PID_OUT;
+ } else {
+ td->pid = USB_PID_IN;
+ }
+ /**** send token ****/
+ hcdi_enqueue(td);
+ free(td);
+
+
+ break;
+ case USB_BULK:
+
+ core.stdout("bulk\r\n");
+ //u8 runloop=1;
+ //u16 restlength = irp->len;
+ //char * td_buf_ptr=irp->buffer;
+
+ /* schleife die die tds generiert */
+ while (runloop) {
+
+ td = usb_create_transfer_descriptor(irp);
+ td->endpoint = td->endpoint & 0x7F; /* clear direction bit */
+
+ /* max packet size for given endpoint */
+ td->actlen = irp->epsize;
+
+ /* Generate In Packet */
+ if (irp->endpoint & 0x80)
+ td->pid = USB_PID_IN;
+ else
+ /* Generate Out Packet */
+ td->pid = USB_PID_OUT;
+
+ /* stop loop if all bytes are send */
+ if (restlength <= irp->epsize) {
+ runloop = 0;
+ td->actlen = restlength;
+ }
+
+ td->buffer = td_buf_ptr;
+ /* move pointer for next packet */
+ td_buf_ptr = td_buf_ptr + irp->epsize;
+
+ td->togl = togl;
+ if (togl == 0)
+ togl = 1;
+ else
+ togl = 0;
+ /**** send token ****/
+ hcdi_enqueue(td);
+ free(td);
+ }
+ /* next togl */
+ //if(td->pid == USB_PID_OUT) {
+ //if(togl==0) togl=1; else togl=0;
+ //}
+ irp->dev->epTogl[(irp->endpoint & 0x7F)] = togl;
+
+ break;
+ }
+
+ return 1;
+}
+
+
+
+/**
+ * Create a transfer descriptor with an parent irp.
+ */
+usb_transfer_descriptor *usb_create_transfer_descriptor(usb_irp * irp)
+{
+ usb_transfer_descriptor *td =
+ (usb_transfer_descriptor *) malloc(sizeof(usb_transfer_descriptor));
+
+ td->devaddress = irp->dev->address;
+ td->endpoint = irp->endpoint;
+ td->iso = 0;
+ td->state = USB_TRANSFER_DESCR_NONE;
+
+ return td;
+}