a594cfbf3e
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1603 c046a42c-6fe2-441c-8c8c-71466251a162
691 lines
21 KiB
C
691 lines
21 KiB
C
/*
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* QEMU USB emulation
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*
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* Copyright (c) 2005 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "vl.h"
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void usb_attach(USBPort *port, USBDevice *dev)
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{
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port->attach(port, dev);
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}
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/**********************/
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/* generic USB device helpers (you are not forced to use them when
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writing your USB device driver, but they help handling the
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protocol)
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*/
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#define SETUP_STATE_IDLE 0
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#define SETUP_STATE_DATA 1
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#define SETUP_STATE_ACK 2
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int usb_generic_handle_packet(USBDevice *s, int pid,
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uint8_t devaddr, uint8_t devep,
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uint8_t *data, int len)
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{
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int l, ret = 0;
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switch(pid) {
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case USB_MSG_ATTACH:
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s->state = USB_STATE_ATTACHED;
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break;
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case USB_MSG_DETACH:
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s->state = USB_STATE_NOTATTACHED;
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break;
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case USB_MSG_RESET:
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s->remote_wakeup = 0;
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s->addr = 0;
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s->state = USB_STATE_DEFAULT;
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s->handle_reset(s);
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break;
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case USB_TOKEN_SETUP:
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if (s->state < USB_STATE_DEFAULT || devaddr != s->addr)
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return USB_RET_NODEV;
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if (len != 8)
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goto fail;
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memcpy(s->setup_buf, data, 8);
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s->setup_len = (s->setup_buf[7] << 8) | s->setup_buf[6];
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s->setup_index = 0;
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if (s->setup_buf[0] & USB_DIR_IN) {
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ret = s->handle_control(s,
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(s->setup_buf[0] << 8) | s->setup_buf[1],
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(s->setup_buf[3] << 8) | s->setup_buf[2],
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(s->setup_buf[5] << 8) | s->setup_buf[4],
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s->setup_len,
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s->data_buf);
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if (ret < 0)
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return ret;
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if (ret < s->setup_len)
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s->setup_len = ret;
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s->setup_state = SETUP_STATE_DATA;
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} else {
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if (s->setup_len == 0)
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s->setup_state = SETUP_STATE_ACK;
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else
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s->setup_state = SETUP_STATE_DATA;
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}
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break;
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case USB_TOKEN_IN:
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if (s->state < USB_STATE_DEFAULT || devaddr != s->addr)
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return USB_RET_NODEV;
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switch(devep) {
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case 0:
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switch(s->setup_state) {
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case SETUP_STATE_ACK:
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s->setup_state = SETUP_STATE_IDLE;
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if (!(s->setup_buf[0] & USB_DIR_IN)) {
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ret = s->handle_control(s,
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(s->setup_buf[0] << 8) | s->setup_buf[1],
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(s->setup_buf[3] << 8) | s->setup_buf[2],
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(s->setup_buf[5] << 8) | s->setup_buf[4],
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s->setup_len,
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s->data_buf);
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if (ret > 0)
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ret = 0;
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} else {
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goto fail;
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}
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break;
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case SETUP_STATE_DATA:
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if (s->setup_buf[0] & USB_DIR_IN) {
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l = s->setup_len - s->setup_index;
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if (l > len)
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l = len;
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memcpy(data, s->data_buf + s->setup_index, l);
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s->setup_index += l;
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if (s->setup_index >= s->setup_len)
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s->setup_state = SETUP_STATE_ACK;
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ret = l;
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} else {
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s->setup_state = SETUP_STATE_IDLE;
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goto fail;
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}
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break;
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default:
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goto fail;
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}
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break;
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default:
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ret = s->handle_data(s, pid, devep, data, len);
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break;
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}
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break;
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case USB_TOKEN_OUT:
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if (s->state < USB_STATE_DEFAULT || devaddr != s->addr)
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return USB_RET_NODEV;
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switch(devep) {
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case 0:
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switch(s->setup_state) {
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case SETUP_STATE_ACK:
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s->setup_state = SETUP_STATE_IDLE;
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if (s->setup_buf[0] & USB_DIR_IN) {
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/* transfer OK */
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} else {
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goto fail;
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}
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break;
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case SETUP_STATE_DATA:
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if (!(s->setup_buf[0] & USB_DIR_IN)) {
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l = s->setup_len - s->setup_index;
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if (l > len)
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l = len;
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memcpy(s->data_buf + s->setup_index, data, l);
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s->setup_index += l;
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if (s->setup_index >= s->setup_len)
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s->setup_state = SETUP_STATE_ACK;
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ret = l;
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} else {
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s->setup_state = SETUP_STATE_IDLE;
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goto fail;
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}
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break;
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default:
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goto fail;
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}
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break;
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default:
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ret = s->handle_data(s, pid, devep, data, len);
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break;
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}
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break;
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default:
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fail:
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ret = USB_RET_STALL;
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break;
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}
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return ret;
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}
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/* XXX: fix overflow */
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int set_usb_string(uint8_t *buf, const char *str)
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{
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int len, i;
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uint8_t *q;
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q = buf;
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len = strlen(str);
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*q++ = 2 * len + 1;
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*q++ = 3;
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for(i = 0; i < len; i++) {
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*q++ = str[i];
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*q++ = 0;
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}
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return q - buf;
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}
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/**********************/
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/* USB hub emulation */
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//#define DEBUG
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#define MAX_PORTS 8
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typedef struct USBHubPort {
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USBPort port;
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uint16_t wPortStatus;
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uint16_t wPortChange;
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} USBHubPort;
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typedef struct USBHubState {
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USBDevice dev;
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int nb_ports;
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USBHubPort ports[MAX_PORTS];
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} USBHubState;
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#define ClearHubFeature (0x2000 | USB_REQ_CLEAR_FEATURE)
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#define ClearPortFeature (0x2300 | USB_REQ_CLEAR_FEATURE)
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#define GetHubDescriptor (0xa000 | USB_REQ_GET_DESCRIPTOR)
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#define GetHubStatus (0xa000 | USB_REQ_GET_STATUS)
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#define GetPortStatus (0xa300 | USB_REQ_GET_STATUS)
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#define SetHubFeature (0x2000 | USB_REQ_SET_FEATURE)
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#define SetPortFeature (0x2300 | USB_REQ_SET_FEATURE)
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#define PORT_STAT_CONNECTION 0x0001
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#define PORT_STAT_ENABLE 0x0002
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#define PORT_STAT_SUSPEND 0x0004
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#define PORT_STAT_OVERCURRENT 0x0008
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#define PORT_STAT_RESET 0x0010
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#define PORT_STAT_POWER 0x0100
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#define PORT_STAT_LOW_SPEED 0x0200
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#define PORT_STAT_HIGH_SPEED 0x0400
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#define PORT_STAT_TEST 0x0800
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#define PORT_STAT_INDICATOR 0x1000
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#define PORT_STAT_C_CONNECTION 0x0001
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#define PORT_STAT_C_ENABLE 0x0002
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#define PORT_STAT_C_SUSPEND 0x0004
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#define PORT_STAT_C_OVERCURRENT 0x0008
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#define PORT_STAT_C_RESET 0x0010
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#define PORT_CONNECTION 0
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#define PORT_ENABLE 1
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#define PORT_SUSPEND 2
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#define PORT_OVERCURRENT 3
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#define PORT_RESET 4
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#define PORT_POWER 8
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#define PORT_LOWSPEED 9
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#define PORT_HIGHSPEED 10
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#define PORT_C_CONNECTION 16
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#define PORT_C_ENABLE 17
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#define PORT_C_SUSPEND 18
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#define PORT_C_OVERCURRENT 19
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#define PORT_C_RESET 20
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#define PORT_TEST 21
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#define PORT_INDICATOR 22
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/* same as Linux kernel root hubs */
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static const uint8_t qemu_hub_dev_descriptor[] = {
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0x12, /* u8 bLength; */
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0x01, /* u8 bDescriptorType; Device */
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0x10, 0x01, /* u16 bcdUSB; v1.1 */
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0x09, /* u8 bDeviceClass; HUB_CLASSCODE */
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0x00, /* u8 bDeviceSubClass; */
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0x00, /* u8 bDeviceProtocol; [ low/full speeds only ] */
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0x08, /* u8 bMaxPacketSize0; 8 Bytes */
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0x00, 0x00, /* u16 idVendor; */
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0x00, 0x00, /* u16 idProduct; */
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0x01, 0x01, /* u16 bcdDevice */
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0x03, /* u8 iManufacturer; */
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0x02, /* u8 iProduct; */
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0x01, /* u8 iSerialNumber; */
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0x01 /* u8 bNumConfigurations; */
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};
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/* XXX: patch interrupt size */
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static const uint8_t qemu_hub_config_descriptor[] = {
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/* one configuration */
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0x09, /* u8 bLength; */
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0x02, /* u8 bDescriptorType; Configuration */
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0x19, 0x00, /* u16 wTotalLength; */
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0x01, /* u8 bNumInterfaces; (1) */
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0x01, /* u8 bConfigurationValue; */
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0x00, /* u8 iConfiguration; */
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0xc0, /* u8 bmAttributes;
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Bit 7: must be set,
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6: Self-powered,
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5: Remote wakeup,
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4..0: resvd */
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0x00, /* u8 MaxPower; */
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/* USB 1.1:
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* USB 2.0, single TT organization (mandatory):
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* one interface, protocol 0
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*
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* USB 2.0, multiple TT organization (optional):
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* two interfaces, protocols 1 (like single TT)
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* and 2 (multiple TT mode) ... config is
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* sometimes settable
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* NOT IMPLEMENTED
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*/
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/* one interface */
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0x09, /* u8 if_bLength; */
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0x04, /* u8 if_bDescriptorType; Interface */
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0x00, /* u8 if_bInterfaceNumber; */
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0x00, /* u8 if_bAlternateSetting; */
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0x01, /* u8 if_bNumEndpoints; */
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0x09, /* u8 if_bInterfaceClass; HUB_CLASSCODE */
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0x00, /* u8 if_bInterfaceSubClass; */
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0x00, /* u8 if_bInterfaceProtocol; [usb1.1 or single tt] */
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0x00, /* u8 if_iInterface; */
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/* one endpoint (status change endpoint) */
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0x07, /* u8 ep_bLength; */
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0x05, /* u8 ep_bDescriptorType; Endpoint */
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0x81, /* u8 ep_bEndpointAddress; IN Endpoint 1 */
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0x03, /* u8 ep_bmAttributes; Interrupt */
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0x02, 0x00, /* u16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) */
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0xff /* u8 ep_bInterval; (255ms -- usb 2.0 spec) */
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};
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static const uint8_t qemu_hub_hub_descriptor[] =
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{
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0x09, /* u8 bLength; */
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0x29, /* u8 bDescriptorType; Hub-descriptor */
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0x00, /* u8 bNbrPorts; (patched later) */
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0x0a, /* u16 wHubCharacteristics; */
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0x00, /* (per-port OC, no power switching) */
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0x01, /* u8 bPwrOn2pwrGood; 2ms */
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0x00, /* u8 bHubContrCurrent; 0 mA */
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0x00, /* u8 DeviceRemovable; *** 7 Ports max *** */
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0xff /* u8 PortPwrCtrlMask; *** 7 ports max *** */
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};
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static void usb_hub_attach(USBPort *port1, USBDevice *dev)
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{
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USBHubState *s = port1->opaque;
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USBHubPort *port = &s->ports[port1->index];
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if (dev) {
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if (port->port.dev)
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usb_attach(port1, NULL);
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port->wPortStatus |= PORT_STAT_CONNECTION;
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port->wPortChange |= PORT_STAT_C_CONNECTION;
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if (dev->speed == USB_SPEED_LOW)
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port->wPortStatus |= PORT_STAT_LOW_SPEED;
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else
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port->wPortStatus &= ~PORT_STAT_LOW_SPEED;
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port->port.dev = dev;
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} else {
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dev = port->port.dev;
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if (dev) {
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port->wPortStatus &= ~PORT_STAT_CONNECTION;
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port->wPortChange |= PORT_STAT_C_CONNECTION;
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if (port->wPortStatus & PORT_STAT_ENABLE) {
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port->wPortStatus &= ~PORT_STAT_ENABLE;
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port->wPortChange |= PORT_STAT_C_ENABLE;
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}
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port->port.dev = NULL;
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}
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}
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}
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static void usb_hub_handle_reset(USBDevice *dev)
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{
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/* XXX: do it */
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}
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static int usb_hub_handle_control(USBDevice *dev, int request, int value,
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int index, int length, uint8_t *data)
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{
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USBHubState *s = (USBHubState *)dev;
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int ret;
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switch(request) {
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case DeviceRequest | USB_REQ_GET_STATUS:
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data[0] = (1 << USB_DEVICE_SELF_POWERED) |
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(dev->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP);
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data[1] = 0x00;
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ret = 2;
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break;
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case DeviceOutRequest | USB_REQ_CLEAR_FEATURE:
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if (value == USB_DEVICE_REMOTE_WAKEUP) {
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dev->remote_wakeup = 0;
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} else {
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goto fail;
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}
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ret = 0;
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break;
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case DeviceOutRequest | USB_REQ_SET_FEATURE:
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if (value == USB_DEVICE_REMOTE_WAKEUP) {
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dev->remote_wakeup = 1;
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} else {
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goto fail;
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}
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ret = 0;
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break;
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case DeviceOutRequest | USB_REQ_SET_ADDRESS:
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dev->addr = value;
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ret = 0;
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break;
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case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
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switch(value >> 8) {
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case USB_DT_DEVICE:
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memcpy(data, qemu_hub_dev_descriptor,
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sizeof(qemu_hub_dev_descriptor));
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ret = sizeof(qemu_hub_dev_descriptor);
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break;
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case USB_DT_CONFIG:
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memcpy(data, qemu_hub_config_descriptor,
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sizeof(qemu_hub_config_descriptor));
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ret = sizeof(qemu_hub_config_descriptor);
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break;
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case USB_DT_STRING:
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switch(value & 0xff) {
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case 0:
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/* language ids */
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data[0] = 4;
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data[1] = 3;
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data[2] = 0x09;
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data[3] = 0x04;
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ret = 4;
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break;
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case 1:
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/* serial number */
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ret = set_usb_string(data, "314159");
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break;
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case 2:
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/* product description */
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ret = set_usb_string(data, "QEMU USB Hub");
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break;
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case 3:
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/* vendor description */
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ret = set_usb_string(data, "QEMU " QEMU_VERSION);
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break;
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default:
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goto fail;
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}
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break;
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default:
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goto fail;
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}
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break;
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case DeviceRequest | USB_REQ_GET_CONFIGURATION:
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data[0] = 1;
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ret = 1;
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break;
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case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
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ret = 0;
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break;
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case DeviceRequest | USB_REQ_GET_INTERFACE:
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data[0] = 0;
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ret = 1;
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break;
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case DeviceOutRequest | USB_REQ_SET_INTERFACE:
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ret = 0;
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break;
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/* usb specific requests */
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case GetHubStatus:
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data[0] = 0;
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data[1] = 0;
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data[2] = 0;
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data[3] = 0;
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ret = 4;
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break;
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case GetPortStatus:
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{
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unsigned int n = index - 1;
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USBHubPort *port;
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if (n >= s->nb_ports)
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goto fail;
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port = &s->ports[n];
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data[0] = port->wPortStatus;
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data[1] = port->wPortStatus >> 8;
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data[2] = port->wPortChange;
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data[3] = port->wPortChange >> 8;
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ret = 4;
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}
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break;
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case SetHubFeature:
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case ClearHubFeature:
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if (value == 0 || value == 1) {
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} else {
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goto fail;
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}
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ret = 0;
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break;
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case SetPortFeature:
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{
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unsigned int n = index - 1;
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USBHubPort *port;
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USBDevice *dev;
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if (n >= s->nb_ports)
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goto fail;
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port = &s->ports[n];
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dev = port->port.dev;
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switch(value) {
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case PORT_SUSPEND:
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port->wPortStatus |= PORT_STAT_SUSPEND;
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break;
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case PORT_RESET:
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if (dev) {
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dev->handle_packet(dev,
|
|
USB_MSG_RESET, 0, 0, NULL, 0);
|
|
port->wPortChange |= PORT_STAT_C_RESET;
|
|
/* set enable bit */
|
|
port->wPortChange |= PORT_STAT_C_ENABLE;
|
|
port->wPortStatus |= PORT_STAT_ENABLE;
|
|
}
|
|
break;
|
|
case PORT_POWER:
|
|
break;
|
|
default:
|
|
goto fail;
|
|
}
|
|
ret = 0;
|
|
}
|
|
break;
|
|
case ClearPortFeature:
|
|
{
|
|
unsigned int n = index - 1;
|
|
USBHubPort *port;
|
|
USBDevice *dev;
|
|
if (n >= s->nb_ports)
|
|
goto fail;
|
|
port = &s->ports[n];
|
|
dev = port->port.dev;
|
|
switch(value) {
|
|
case PORT_ENABLE:
|
|
port->wPortStatus &= ~PORT_STAT_ENABLE;
|
|
break;
|
|
case PORT_C_ENABLE:
|
|
port->wPortChange &= ~PORT_STAT_C_ENABLE;
|
|
break;
|
|
case PORT_SUSPEND:
|
|
port->wPortStatus &= ~PORT_STAT_SUSPEND;
|
|
break;
|
|
case PORT_C_SUSPEND:
|
|
port->wPortChange &= ~PORT_STAT_C_SUSPEND;
|
|
break;
|
|
case PORT_C_CONNECTION:
|
|
port->wPortChange &= ~PORT_STAT_C_CONNECTION;
|
|
break;
|
|
case PORT_C_OVERCURRENT:
|
|
port->wPortChange &= ~PORT_STAT_C_OVERCURRENT;
|
|
break;
|
|
case PORT_C_RESET:
|
|
port->wPortChange &= ~PORT_STAT_C_RESET;
|
|
break;
|
|
default:
|
|
goto fail;
|
|
}
|
|
ret = 0;
|
|
}
|
|
break;
|
|
case GetHubDescriptor:
|
|
memcpy(data, qemu_hub_hub_descriptor,
|
|
sizeof(qemu_hub_hub_descriptor));
|
|
data[2] = s->nb_ports;
|
|
ret = sizeof(qemu_hub_hub_descriptor);
|
|
break;
|
|
default:
|
|
fail:
|
|
ret = USB_RET_STALL;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int usb_hub_handle_data(USBDevice *dev, int pid,
|
|
uint8_t devep, uint8_t *data, int len)
|
|
{
|
|
USBHubState *s = (USBHubState *)dev;
|
|
int ret;
|
|
|
|
switch(pid) {
|
|
case USB_TOKEN_IN:
|
|
if (devep == 1) {
|
|
USBHubPort *port;
|
|
unsigned int status;
|
|
int i, n;
|
|
n = (s->nb_ports + 1 + 7) / 8;
|
|
if (n > len)
|
|
return USB_RET_BABBLE;
|
|
status = 0;
|
|
for(i = 0; i < s->nb_ports; i++) {
|
|
port = &s->ports[i];
|
|
if (port->wPortChange)
|
|
status |= (1 << (i + 1));
|
|
}
|
|
if (status != 0) {
|
|
for(i = 0; i < n; i++) {
|
|
data[i] = status >> (8 * i);
|
|
}
|
|
ret = n;
|
|
} else {
|
|
ret = 0;
|
|
}
|
|
} else {
|
|
goto fail;
|
|
}
|
|
break;
|
|
case USB_TOKEN_OUT:
|
|
default:
|
|
fail:
|
|
ret = USB_RET_STALL;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int usb_hub_broadcast_packet(USBHubState *s, int pid,
|
|
uint8_t devaddr, uint8_t devep,
|
|
uint8_t *data, int len)
|
|
{
|
|
USBHubPort *port;
|
|
USBDevice *dev;
|
|
int i, ret;
|
|
|
|
for(i = 0; i < s->nb_ports; i++) {
|
|
port = &s->ports[i];
|
|
dev = port->port.dev;
|
|
if (dev && (port->wPortStatus & PORT_STAT_ENABLE)) {
|
|
ret = dev->handle_packet(dev, pid,
|
|
devaddr, devep,
|
|
data, len);
|
|
if (ret != USB_RET_NODEV) {
|
|
return ret;
|
|
}
|
|
}
|
|
}
|
|
return USB_RET_NODEV;
|
|
}
|
|
|
|
static int usb_hub_handle_packet(USBDevice *dev, int pid,
|
|
uint8_t devaddr, uint8_t devep,
|
|
uint8_t *data, int len)
|
|
{
|
|
USBHubState *s = (USBHubState *)dev;
|
|
|
|
#if defined(DEBUG) && 0
|
|
printf("usb_hub: pid=0x%x\n", pid);
|
|
#endif
|
|
if (dev->state == USB_STATE_DEFAULT &&
|
|
dev->addr != 0 &&
|
|
devaddr != dev->addr &&
|
|
(pid == USB_TOKEN_SETUP ||
|
|
pid == USB_TOKEN_OUT ||
|
|
pid == USB_TOKEN_IN)) {
|
|
/* broadcast the packet to the devices */
|
|
return usb_hub_broadcast_packet(s, pid, devaddr, devep, data, len);
|
|
}
|
|
return usb_generic_handle_packet(dev, pid, devaddr, devep, data, len);
|
|
}
|
|
|
|
USBDevice *usb_hub_init(USBPort **usb_ports, int nb_ports)
|
|
{
|
|
USBHubState *s;
|
|
USBHubPort *port;
|
|
int i;
|
|
|
|
if (nb_ports > MAX_PORTS)
|
|
return NULL;
|
|
s = qemu_mallocz(sizeof(USBHubState));
|
|
if (!s)
|
|
return NULL;
|
|
s->dev.speed = USB_SPEED_FULL;
|
|
s->dev.handle_packet = usb_hub_handle_packet;
|
|
|
|
/* generic USB device init */
|
|
s->dev.handle_reset = usb_hub_handle_reset;
|
|
s->dev.handle_control = usb_hub_handle_control;
|
|
s->dev.handle_data = usb_hub_handle_data;
|
|
|
|
s->nb_ports = nb_ports;
|
|
for(i = 0; i < s->nb_ports; i++) {
|
|
port = &s->ports[i];
|
|
port->wPortStatus = PORT_STAT_POWER;
|
|
port->wPortChange = 0;
|
|
port->port.attach = usb_hub_attach;
|
|
port->port.opaque = s;
|
|
port->port.index = i;
|
|
usb_ports[i] = &port->port;
|
|
}
|
|
return (USBDevice *)s;
|
|
}
|