269 lines
6.9 KiB
C
269 lines
6.9 KiB
C
/*
|
|
* This file is part of the libopenstm32 project.
|
|
*
|
|
* Copyright (C) 2010 Gareth McMullin <gareth@blacksphere.co.nz>
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <string.h>
|
|
|
|
#include <usbd.h>
|
|
#include "usb_private.h"
|
|
|
|
void usbd_register_set_config_callback(void (*callback)(uint16_t wValue))
|
|
{
|
|
_usbd_device.user_callback_set_config = callback;
|
|
}
|
|
|
|
static uint16_t
|
|
build_config_descriptor(uint8_t index, uint8_t *buf, uint16_t len)
|
|
{
|
|
uint8_t *tmpbuf = buf;
|
|
const struct usb_config_descriptor *cfg = &_usbd_device.config[index];
|
|
uint16_t count, total = 0, totallen = 0;
|
|
uint16_t i, j, k;
|
|
|
|
memcpy(buf, cfg, count = MIN(len, cfg->bLength));
|
|
buf += count; len -= count; total += count; totallen += cfg->bLength;
|
|
|
|
/* For each interface... */
|
|
for(i = 0; i < cfg->bNumInterfaces; i++) {
|
|
/* For each alternate setting... */
|
|
for(j = 0; j < cfg->interface[i].num_altsetting; j++) {
|
|
const struct usb_interface_descriptor *iface =
|
|
&cfg->interface[i].altsetting[j];
|
|
/* Copy interface descriptor */
|
|
memcpy(buf, iface, count = MIN(len, iface->bLength));
|
|
buf += count; len -= count;
|
|
total += count; totallen += iface->bLength;
|
|
/* Copy extra bytes (function descriptors) */
|
|
memcpy(buf, iface->extra,
|
|
count = MIN(len, iface->extralen));
|
|
buf += count; len -= count;
|
|
total += count; totallen += iface->extralen;
|
|
/* For each endpoint... */
|
|
for(k = 0; k < iface->bNumEndpoints; k++) {
|
|
const struct usb_endpoint_descriptor *ep =
|
|
&iface->endpoint[k];
|
|
memcpy(buf, ep, count = MIN(len, ep->bLength));
|
|
buf += count; len -= count;
|
|
total += count; totallen += ep->bLength;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Fill in wTotalLength */
|
|
*(uint16_t*)(tmpbuf+2) = totallen;
|
|
|
|
return total;
|
|
}
|
|
|
|
static int usb_standard_get_descriptor(struct usb_setup_data *req,
|
|
uint8_t **buf, uint16_t *len)
|
|
{
|
|
int i;
|
|
|
|
switch(req->wValue >> 8) {
|
|
case USB_DT_DEVICE:
|
|
*buf = (uint8_t *)_usbd_device.desc;
|
|
*len = MIN(*len, _usbd_device.desc->bLength);
|
|
return 1;
|
|
|
|
case USB_DT_CONFIGURATION: {
|
|
*buf = _usbd_device.ctrl_buf;
|
|
*len = build_config_descriptor(req->wValue & 0xff, *buf, *len);
|
|
return 1;
|
|
}
|
|
|
|
case USB_DT_STRING: {
|
|
struct usb_string_descriptor *sd =
|
|
(struct usb_string_descriptor *)_usbd_device.ctrl_buf;
|
|
|
|
if(!_usbd_device.strings)
|
|
return 0; /* Device doesn't support strings */
|
|
|
|
sd->bLength = strlen(_usbd_device.strings[req->wValue & 0xff])
|
|
* 2 + 2;
|
|
sd->bDescriptorType = USB_DT_STRING;
|
|
|
|
*buf = (uint8_t *)sd;
|
|
*len = MIN(*len, sd->bLength);
|
|
|
|
for(i = 0; i < (*len / 2) - 1; i++)
|
|
sd->wData[i] =
|
|
_usbd_device.strings[req->wValue & 0xff][i];
|
|
|
|
/* Send sane Language ID descriptor... */
|
|
if((req->wValue & 0xff) == 0)
|
|
sd->wData[0] = 0x409;
|
|
|
|
return 1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int usb_standard_set_address(struct usb_setup_data *req)
|
|
{
|
|
/* The actual address is only latched at the STATUS IN stage */
|
|
if((req->bmRequestType != 0) || (req->wValue >= 128)) return 0;
|
|
|
|
_usbd_device.current_address = req->wValue;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int usb_standard_set_configuration(struct usb_setup_data *req)
|
|
{
|
|
/* Is this correct, or should we reset alternate settings */
|
|
if(req->wValue == _usbd_device.current_config) return 1;
|
|
|
|
_usbd_device.current_config = req->wValue;
|
|
|
|
/* Reset all endpoints */
|
|
_usbd_hw_endpoints_reset();
|
|
|
|
if(_usbd_device.user_callback_set_config)
|
|
_usbd_device.user_callback_set_config(req->wValue);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int usb_standard_get_configuration(struct usb_setup_data *req,
|
|
uint8_t **buf, uint16_t *len)
|
|
{
|
|
(void)req;
|
|
|
|
if(*len > 1) *len = 1;
|
|
(*buf)[0] = _usbd_device.current_config;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int usb_standard_set_interface(struct usb_setup_data *req)
|
|
{
|
|
(void)req;
|
|
/* FIXME: Do something meaningful here: call app */
|
|
return 1;
|
|
}
|
|
|
|
static int usb_standard_get_status(struct usb_setup_data *req, uint8_t **buf,
|
|
uint16_t *len)
|
|
{
|
|
(void)req;
|
|
/* FIXME: Return some meaningful status */
|
|
|
|
if(*len > 2) *len = 2;
|
|
(*buf)[0] = 0;
|
|
(*buf)[1] = 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int _usbd_standard_request_command(struct usb_setup_data *req)
|
|
{
|
|
int (*command)(struct usb_setup_data *req) = NULL;
|
|
|
|
if((req->bmRequestType & 0x60) != USB_REQ_TYPE_STANDARD)
|
|
return 0;
|
|
|
|
switch(req->bRequest) {
|
|
case USB_REQ_CLEAR_FEATURE:
|
|
/* FIXME: Implement CLEAR_FEATURE */
|
|
/* TODO: Check what standard features are.
|
|
* Maybe this is the application's responsibility. */
|
|
break;
|
|
case USB_REQ_SET_ADDRESS:
|
|
/* SET ADDRESS is an exception.
|
|
* It is only processed at STATUS stage */
|
|
command = usb_standard_set_address;
|
|
break;
|
|
case USB_REQ_SET_CONFIGURATION:
|
|
command = usb_standard_set_configuration;
|
|
break;
|
|
case USB_REQ_SET_FEATURE:
|
|
/* FIXME: Implement SET_FEATURE */
|
|
/* TODO: Check what standard features are.
|
|
* Maybe this is the application's responsibility. */
|
|
break;
|
|
case USB_REQ_SET_INTERFACE:
|
|
command = usb_standard_set_interface;
|
|
break;
|
|
}
|
|
|
|
if(!command) return 0;
|
|
|
|
return command(req);
|
|
}
|
|
|
|
int _usbd_standard_request_read(struct usb_setup_data *req, uint8_t **buf,
|
|
uint16_t *len)
|
|
{
|
|
int (*command)(struct usb_setup_data *req, uint8_t **buf,
|
|
uint16_t *len) = NULL;
|
|
|
|
/* Handle standard requests */
|
|
if((req->bmRequestType & 0x60) != USB_REQ_TYPE_STANDARD)
|
|
return 0;
|
|
|
|
switch(req->bRequest) {
|
|
case USB_REQ_GET_CONFIGURATION:
|
|
command = usb_standard_get_configuration;
|
|
break;
|
|
case USB_REQ_GET_DESCRIPTOR:
|
|
command = usb_standard_get_descriptor;
|
|
break;
|
|
case USB_REQ_GET_INTERFACE:
|
|
/* FIXME: Implement GET_INTERFACE */
|
|
break;
|
|
case USB_REQ_GET_STATUS:
|
|
/* GET_STATUS always responds with zero reply.
|
|
* The application may override this behaviour. */
|
|
command = usb_standard_get_status;
|
|
break;
|
|
}
|
|
|
|
if(!command) return 0;
|
|
|
|
return command(req, buf, len);
|
|
}
|
|
|
|
int _usbd_standard_request_write(struct usb_setup_data *req, uint8_t *buf,
|
|
uint16_t len)
|
|
{
|
|
int (*command)(struct usb_setup_data *req, uint8_t *buf, uint16_t len)
|
|
= NULL;
|
|
|
|
/* Handle standard requests */
|
|
if((req->bmRequestType & 0x60) != USB_REQ_TYPE_STANDARD)
|
|
return 0;
|
|
|
|
switch(req->bRequest) {
|
|
case USB_REQ_SET_DESCRIPTOR:
|
|
/* SET_DESCRIPTOR is optional and not implemented. */
|
|
break;
|
|
case USB_REQ_SET_SYNCH_FRAME:
|
|
/* FIXME: SYNCH_FRAME is not implemented. */
|
|
/* SYNCH_FRAME is used for synchronization of isochronous
|
|
* endpoints which are not yet implemented. */
|
|
break;
|
|
}
|
|
|
|
if(!command) return 0;
|
|
|
|
return command(req, buf, len);
|
|
}
|
|
|