git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3674 c046a42c-6fe2-441c-8c8c-71466251a162
205 lines
6.5 KiB
C
205 lines
6.5 KiB
C
/*
|
|
* QEMU USB emulation
|
|
*
|
|
* Copyright (c) 2005 Fabrice Bellard
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
#include "qemu-common.h"
|
|
#include "usb.h"
|
|
|
|
void usb_attach(USBPort *port, USBDevice *dev)
|
|
{
|
|
port->attach(port, dev);
|
|
}
|
|
|
|
/**********************/
|
|
/* generic USB device helpers (you are not forced to use them when
|
|
writing your USB device driver, but they help handling the
|
|
protocol)
|
|
*/
|
|
|
|
#define SETUP_STATE_IDLE 0
|
|
#define SETUP_STATE_DATA 1
|
|
#define SETUP_STATE_ACK 2
|
|
|
|
int usb_generic_handle_packet(USBDevice *s, USBPacket *p)
|
|
{
|
|
int l, ret = 0;
|
|
int len = p->len;
|
|
uint8_t *data = p->data;
|
|
|
|
switch(p->pid) {
|
|
case USB_MSG_ATTACH:
|
|
s->state = USB_STATE_ATTACHED;
|
|
break;
|
|
case USB_MSG_DETACH:
|
|
s->state = USB_STATE_NOTATTACHED;
|
|
break;
|
|
case USB_MSG_RESET:
|
|
s->remote_wakeup = 0;
|
|
s->addr = 0;
|
|
s->state = USB_STATE_DEFAULT;
|
|
s->handle_reset(s);
|
|
break;
|
|
case USB_TOKEN_SETUP:
|
|
if (s->state < USB_STATE_DEFAULT || p->devaddr != s->addr)
|
|
return USB_RET_NODEV;
|
|
if (len != 8)
|
|
goto fail;
|
|
memcpy(s->setup_buf, data, 8);
|
|
s->setup_len = (s->setup_buf[7] << 8) | s->setup_buf[6];
|
|
s->setup_index = 0;
|
|
if (s->setup_buf[0] & USB_DIR_IN) {
|
|
ret = s->handle_control(s,
|
|
(s->setup_buf[0] << 8) | s->setup_buf[1],
|
|
(s->setup_buf[3] << 8) | s->setup_buf[2],
|
|
(s->setup_buf[5] << 8) | s->setup_buf[4],
|
|
s->setup_len,
|
|
s->data_buf);
|
|
if (ret < 0)
|
|
return ret;
|
|
if (ret < s->setup_len)
|
|
s->setup_len = ret;
|
|
s->setup_state = SETUP_STATE_DATA;
|
|
} else {
|
|
if (s->setup_len == 0)
|
|
s->setup_state = SETUP_STATE_ACK;
|
|
else
|
|
s->setup_state = SETUP_STATE_DATA;
|
|
}
|
|
break;
|
|
case USB_TOKEN_IN:
|
|
if (s->state < USB_STATE_DEFAULT || p->devaddr != s->addr)
|
|
return USB_RET_NODEV;
|
|
switch(p->devep) {
|
|
case 0:
|
|
switch(s->setup_state) {
|
|
case SETUP_STATE_ACK:
|
|
if (!(s->setup_buf[0] & USB_DIR_IN)) {
|
|
s->setup_state = SETUP_STATE_IDLE;
|
|
ret = s->handle_control(s,
|
|
(s->setup_buf[0] << 8) | s->setup_buf[1],
|
|
(s->setup_buf[3] << 8) | s->setup_buf[2],
|
|
(s->setup_buf[5] << 8) | s->setup_buf[4],
|
|
s->setup_len,
|
|
s->data_buf);
|
|
if (ret > 0)
|
|
ret = 0;
|
|
} else {
|
|
/* return 0 byte */
|
|
}
|
|
break;
|
|
case SETUP_STATE_DATA:
|
|
if (s->setup_buf[0] & USB_DIR_IN) {
|
|
l = s->setup_len - s->setup_index;
|
|
if (l > len)
|
|
l = len;
|
|
memcpy(data, s->data_buf + s->setup_index, l);
|
|
s->setup_index += l;
|
|
if (s->setup_index >= s->setup_len)
|
|
s->setup_state = SETUP_STATE_ACK;
|
|
ret = l;
|
|
} else {
|
|
s->setup_state = SETUP_STATE_IDLE;
|
|
goto fail;
|
|
}
|
|
break;
|
|
default:
|
|
goto fail;
|
|
}
|
|
break;
|
|
default:
|
|
ret = s->handle_data(s, p);
|
|
break;
|
|
}
|
|
break;
|
|
case USB_TOKEN_OUT:
|
|
if (s->state < USB_STATE_DEFAULT || p->devaddr != s->addr)
|
|
return USB_RET_NODEV;
|
|
switch(p->devep) {
|
|
case 0:
|
|
switch(s->setup_state) {
|
|
case SETUP_STATE_ACK:
|
|
if (s->setup_buf[0] & USB_DIR_IN) {
|
|
s->setup_state = SETUP_STATE_IDLE;
|
|
/* transfer OK */
|
|
} else {
|
|
/* ignore additional output */
|
|
}
|
|
break;
|
|
case SETUP_STATE_DATA:
|
|
if (!(s->setup_buf[0] & USB_DIR_IN)) {
|
|
l = s->setup_len - s->setup_index;
|
|
if (l > len)
|
|
l = len;
|
|
memcpy(s->data_buf + s->setup_index, data, l);
|
|
s->setup_index += l;
|
|
if (s->setup_index >= s->setup_len)
|
|
s->setup_state = SETUP_STATE_ACK;
|
|
ret = l;
|
|
} else {
|
|
s->setup_state = SETUP_STATE_IDLE;
|
|
goto fail;
|
|
}
|
|
break;
|
|
default:
|
|
goto fail;
|
|
}
|
|
break;
|
|
default:
|
|
ret = s->handle_data(s, p);
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
fail:
|
|
ret = USB_RET_STALL;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/* XXX: fix overflow */
|
|
int set_usb_string(uint8_t *buf, const char *str)
|
|
{
|
|
int len, i;
|
|
uint8_t *q;
|
|
|
|
q = buf;
|
|
len = strlen(str);
|
|
*q++ = 2 * len + 2;
|
|
*q++ = 3;
|
|
for(i = 0; i < len; i++) {
|
|
*q++ = str[i];
|
|
*q++ = 0;
|
|
}
|
|
return q - buf;
|
|
}
|
|
|
|
/* Send an internal message to a USB device. */
|
|
void usb_send_msg(USBDevice *dev, int msg)
|
|
{
|
|
USBPacket p;
|
|
memset(&p, 0, sizeof(p));
|
|
p.pid = msg;
|
|
dev->handle_packet(dev, &p);
|
|
}
|
|
|