2 * Copyright (c) 2006, Benedikt Sauter <sauter@ixbat.de>
5 * Short descripton of file:
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * * Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * * Redistributions in binary form must reproduce the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer in the documentation and/or other materials provided
17 * with the distribution.
18 * * Neither the name of the FH Augsburg nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
25 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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28 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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32 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37 #include "../host/host.h"
39 #include "../usbspec/usb11spec.h"
40 #include "../lib/list.h"
41 #include "../../malloc.h"
42 #include "../../bootmii_ppc.h" //printf
45 * Initialize USB stack.
49 core.drivers = list_create();
50 core.devices = list_create();
56 * Get next free usb device address.
60 u8 addr = core.nextaddress;
67 * Call this function periodically for
68 * control and transfer management.
72 // call ever registered driver
74 element *iterator = core.drivers->head;
75 while (iterator != NULL) {
76 drv = (usb_driver *) iterator->data;
78 iterator = iterator->next;
84 * Enumerate new device and create data structures
85 * for the core. usb_add_device expected that
86 * the device answers to address zero.
88 usb_device *usb_add_device()
90 usb_device *dev = (usb_device *) malloc(sizeof(usb_device));
92 dev->bMaxPacketSize0 = 8; /* send at first time only 8 bytes */
104 /* ask first 8 bytes of device descriptor with this special
105 * GET Descriptor Request, when device address = 0
107 usb_control_msg(dev, 0x80, GET_DESCRIPTOR, 1, 0, 64, buf, 8, 0);
108 printf("===========\nafter usb control msg:\n");
109 hexdump(buf, sizeof(buf));
113 u8 address = usb_next_address();
114 dev->bMaxPacketSize0 = (u8) buf[7] ? (u8) buf[7] : 1; //dirty? /* setup real ep0 fifo size */
115 devdescr_size = (u8) buf[0]; /* save real length of device descriptor */
117 /* define new adress */
118 usb_control_msg(dev, 0x00, SET_ADDRESS, address << 8, 0, 0, buf, 8, 0);
119 dev->address = address;
121 /* get complete device descriptor */
122 usb_control_msg(dev, 0x80, GET_DESCRIPTOR, 1, 0, devdescr_size, buf, 8,
125 /* save only really neccessary values for this small usbstack */
126 dev->bDeviceClass = (u8) buf[4];
127 dev->bDeviceSubClass = (u8) buf[5];
128 dev->bDeviceProtocoll = (u8) buf[6];
129 dev->idVendor = (u16) (buf[9] << 8) | (buf[8]);
130 dev->idProduct = (u16) (buf[11] << 8) | (buf[10]);
131 dev->bcdDevice = (u16) (buf[13] << 8) | (buf[12]);
133 printf( "bDeviceClass 0x%02X\n"
134 "bDeviceSubClass 0x%02X\n"
135 "bDeviceProtocoll 0x%02X\n"
138 "bcdDevice 0x%04X\n", dev->bDeviceClass,
139 dev->bDeviceSubClass, dev->bDeviceProtocoll,
140 dev->idVendor, dev->idProduct, dev->bcdDevice);
141 /* for lewurms keyboard it should be:
151 // string descriptoren werden nicht im arbeitsspeicher gehalten -> on demand mit
152 // entprechenden funktionen
153 // hier muss man noch mehr abholen, konfigurationene, interfaces und endpunkte
155 /* add device to device list */
156 element *tmp = (element *) malloc(sizeof(element));
157 tmp->data = (void *) dev;
158 list_add_tail(core.devices, tmp);
167 * Find currently detached device and remove
170 u8 usb_remove_device(usb_device * dev)
172 // FIXME!!!! dieser quatsch ist nur temporaer
173 free(core.devices->head);
175 core.devices = list_create();
180 * Register new driver at usb stack.
182 u8 usb_register_driver(usb_driver * dev)
184 /* add driver to driver list */
185 element *tmp = (element *) malloc(sizeof(element));
186 tmp->data = (void *) dev;
188 list_add_tail(core.drivers, tmp);
192 * first check to find a suitable device
193 * (root hub drivers need this call here)
202 * Call every probe function from every registered
203 * driver, to check if there is a valid driver
204 * for the new device.
206 void usb_probe_driver()
208 // call ever registered driver
210 element *iterator = core.drivers->head;
211 while (iterator != NULL) {
212 drv = (usb_driver *) iterator->data;
214 iterator = iterator->next;
221 usb_irp *usb_get_irp()
229 u8 usb_remove_irp(usb_irp * irp)
236 * Takes usb_irp and split it into
237 * several usb packeges (SETUP,IN,OUT)
238 * In the usbstack they are transported with the
239 * usb_transfer_descriptor data structure.
241 u16 usb_submit_irp(usb_irp *irp)
243 usb_transfer_descriptor *td;
245 u16 restlength = irp->len;
246 char *td_buf_ptr = irp->buffer;
248 //u8 togl=irp->dev->epTogl[(irp->endpoint & 0x7F)];
249 u8 togl = irp->dev->epTogl[(irp->endpoint & 0x7F)];
255 /* alle requests mit dem gleichen algorithmus zerteilen
256 * das einzige ist der spezielle get_Device_descriptor request
257 * bei dem eine laenge von 64 angegeben ist.
258 * wenn man an adresse 0 einen get_device_desciptor schickt
259 * dann reichen die ersten 8 byte.
262 /***************** Setup Stage ***********************/
263 td = usb_create_transfer_descriptor(irp);
264 td->pid = USB_PID_SETUP;
265 td->buffer = irp->buffer;
266 td->actlen = 8; /* control message are always 8 bytes */
269 td->togl = togl; /* start with data0 */
274 /**** send token ****/
277 /***************** Data Stage ***********************/
279 * You can see at bit 7 of bmRequestType if this stage is used,
280 * default requests are always 8 byte greate, from
281 * host to device. Stage 3 is only neccessary if the request
282 * expected datas from the device.
283 * bit7 - 1 = from device to host -> yes we need data stage
284 * bit7 - 0 = from host to device -> no send zero packet
286 * nach einem setup token kann nur ein IN token in stage 3 folgen
287 * nie aber ein OUT. Ein Zero OUT wird nur als Bestaetigung benoetigt.
292 * - es kommen noch Daten mit PID_IN an
293 * - host beendet mit PID_OUT DATA1 Zero
295 * Host zu Device (wie set address)
296 * - device sendet ein PID_IN DATA1 Zero Packet als bestaetigung
298 usb_device_request *setup = (usb_device_request *) irp->buffer;
299 u8 bmRequestType = setup->bmRequestType;
301 if (bmRequestType & 0x80) { /* check bit 7 of bmRequestType */
303 /* schleife die die tds generiert */
305 td = usb_create_transfer_descriptor(irp);
306 td->actlen = irp->epsize;
307 /* stop loop if all bytes are send */
308 if (restlength <= irp->epsize) {
310 td->actlen = restlength;
313 td->buffer = td_buf_ptr;
314 /* move pointer for next packet */
315 td_buf_ptr = td_buf_ptr + irp->epsize;
317 td->pid = USB_PID_IN;
324 /* wenn device descriptor von adresse 0 angefragt wird werden nur
325 * die ersten 8 byte abgefragt
327 if (setup->bRequest == GET_DESCRIPTOR && (setup->wValue >> 8) == 1
328 && td->devaddress == 0) {
329 runloop = 0; /* stop loop */
332 /**** send token ****/
335 /* pruefe ob noch weitere Pakete vom Device abgeholt werden muessen */
336 restlength = restlength - irp->epsize;
341 /***************** Status Stage ***********************/
342 /* Zero packet for end */
343 td = usb_create_transfer_descriptor(irp);
344 td->togl = 1; /* zero data packet = always DATA1 packet */
349 * bit7 = 1, host beendet mit PID_OUT DATA1 Zero
350 * bit7 = 0, device sendet ein PID_IN DATA1 Zero Packet als bestaetigung
352 if (bmRequestType & 0x80) { /* check bit 7 of bmRequestType */
353 td->pid = USB_PID_OUT;
355 td->pid = USB_PID_IN;
357 /**** send token ****/
365 core.stdout("bulk\r\n");
367 //u16 restlength = irp->len;
368 //char * td_buf_ptr=irp->buffer;
370 /* schleife die die tds generiert */
373 td = usb_create_transfer_descriptor(irp);
374 td->endpoint = td->endpoint & 0x7F; /* clear direction bit */
376 /* max packet size for given endpoint */
377 td->actlen = irp->epsize;
379 /* Generate In Packet */
380 if (irp->endpoint & 0x80)
381 td->pid = USB_PID_IN;
383 /* Generate Out Packet */
384 td->pid = USB_PID_OUT;
386 /* stop loop if all bytes are send */
387 if (restlength <= irp->epsize) {
389 td->actlen = restlength;
392 td->buffer = td_buf_ptr;
393 /* move pointer for next packet */
394 td_buf_ptr = td_buf_ptr + irp->epsize;
401 /**** send token ****/
406 //if(td->pid == USB_PID_OUT) {
407 //if(togl==0) togl=1; else togl=0;
409 irp->dev->epTogl[(irp->endpoint & 0x7F)] = togl;
420 * Create a transfer descriptor with an parent irp.
422 usb_transfer_descriptor *usb_create_transfer_descriptor(usb_irp * irp)
424 usb_transfer_descriptor *td =
425 (usb_transfer_descriptor *) malloc(sizeof(usb_transfer_descriptor));
427 td->devaddress = irp->dev->address;
428 td->endpoint = irp->endpoint;
430 td->state = USB_TRANSFER_DESCR_NONE;
431 td->maxp = irp->epsize;