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/*
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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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* 2008 Generic packet handler rewrite by Max Krasnyansky
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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 "qemu-common.h" |
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#include "hw/usb.h" |
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#include "iov.h" |
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#include "trace.h" |
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void usb_attach(USBPort *port)
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{ |
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USBDevice *dev = port->dev; |
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assert(dev != NULL);
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assert(dev->attached); |
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assert(dev->state == USB_STATE_NOTATTACHED); |
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port->ops->attach(port); |
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dev->state = USB_STATE_ATTACHED; |
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usb_device_handle_attach(dev); |
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} |
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|
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void usb_detach(USBPort *port)
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{ |
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USBDevice *dev = port->dev; |
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assert(dev != NULL);
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assert(dev->state != USB_STATE_NOTATTACHED); |
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port->ops->detach(port); |
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dev->state = USB_STATE_NOTATTACHED; |
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} |
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|
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void usb_port_reset(USBPort *port)
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{ |
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USBDevice *dev = port->dev; |
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assert(dev != NULL);
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usb_detach(port); |
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usb_attach(port); |
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usb_device_reset(dev); |
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} |
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void usb_device_reset(USBDevice *dev)
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{ |
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if (dev == NULL || !dev->attached) { |
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return;
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} |
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dev->remote_wakeup = 0;
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dev->addr = 0;
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dev->state = USB_STATE_DEFAULT; |
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usb_device_handle_reset(dev); |
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} |
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|
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void usb_wakeup(USBEndpoint *ep)
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{ |
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USBDevice *dev = ep->dev; |
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USBBus *bus = usb_bus_from_device(dev); |
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if (dev->remote_wakeup && dev->port && dev->port->ops->wakeup) {
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dev->port->ops->wakeup(dev->port); |
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} |
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if (bus->ops->wakeup_endpoint) {
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bus->ops->wakeup_endpoint(bus, ep); |
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} |
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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_SETUP 1 |
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#define SETUP_STATE_DATA 2 |
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#define SETUP_STATE_ACK 3 |
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#define SETUP_STATE_PARAM 4 |
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|
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static int do_token_setup(USBDevice *s, USBPacket *p) |
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{ |
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int request, value, index;
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int ret = 0; |
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if (p->iov.size != 8) { |
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return USB_RET_STALL;
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} |
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usb_packet_copy(p, s->setup_buf, p->iov.size); |
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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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|
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request = (s->setup_buf[0] << 8) | s->setup_buf[1]; |
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value = (s->setup_buf[3] << 8) | s->setup_buf[2]; |
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index = (s->setup_buf[5] << 8) | s->setup_buf[4]; |
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if (s->setup_buf[0] & USB_DIR_IN) { |
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ret = usb_device_handle_control(s, p, request, value, index, |
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s->setup_len, s->data_buf); |
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if (ret == USB_RET_ASYNC) {
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s->setup_state = SETUP_STATE_SETUP; |
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return USB_RET_ASYNC;
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} |
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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 > sizeof(s->data_buf)) { |
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fprintf(stderr, |
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"usb_generic_handle_packet: ctrl buffer too small (%d > %zu)\n",
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s->setup_len, sizeof(s->data_buf));
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return USB_RET_STALL;
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} |
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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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return ret;
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} |
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static int do_token_in(USBDevice *s, USBPacket *p) |
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{ |
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int request, value, index;
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int ret = 0; |
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assert(p->ep->nr == 0);
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request = (s->setup_buf[0] << 8) | s->setup_buf[1]; |
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value = (s->setup_buf[3] << 8) | s->setup_buf[2]; |
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index = (s->setup_buf[5] << 8) | s->setup_buf[4]; |
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switch(s->setup_state) {
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case SETUP_STATE_ACK:
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if (!(s->setup_buf[0] & USB_DIR_IN)) { |
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ret = usb_device_handle_control(s, p, request, value, index, |
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s->setup_len, s->data_buf); |
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if (ret == USB_RET_ASYNC) {
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return USB_RET_ASYNC;
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} |
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s->setup_state = SETUP_STATE_IDLE; |
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if (ret > 0) |
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return 0; |
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return ret;
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} |
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/* return 0 byte */
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return 0; |
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case SETUP_STATE_DATA:
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if (s->setup_buf[0] & USB_DIR_IN) { |
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int len = s->setup_len - s->setup_index;
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if (len > p->iov.size) {
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len = p->iov.size; |
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} |
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usb_packet_copy(p, s->data_buf + s->setup_index, len); |
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s->setup_index += len; |
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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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return len;
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} |
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s->setup_state = SETUP_STATE_IDLE; |
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return USB_RET_STALL;
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default:
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return USB_RET_STALL;
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} |
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} |
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static int do_token_out(USBDevice *s, USBPacket *p) |
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{ |
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assert(p->ep->nr == 0);
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switch(s->setup_state) {
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case SETUP_STATE_ACK:
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if (s->setup_buf[0] & USB_DIR_IN) { |
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s->setup_state = SETUP_STATE_IDLE; |
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/* transfer OK */
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} else {
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/* ignore additional output */
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} |
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return 0; |
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case SETUP_STATE_DATA:
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if (!(s->setup_buf[0] & USB_DIR_IN)) { |
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int len = s->setup_len - s->setup_index;
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if (len > p->iov.size) {
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len = p->iov.size; |
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} |
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usb_packet_copy(p, s->data_buf + s->setup_index, len); |
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s->setup_index += len; |
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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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return len;
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} |
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s->setup_state = SETUP_STATE_IDLE; |
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return USB_RET_STALL;
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default:
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return USB_RET_STALL;
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} |
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} |
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static int do_parameter(USBDevice *s, USBPacket *p) |
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{ |
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int request, value, index;
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int i, ret = 0; |
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for (i = 0; i < 8; i++) { |
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s->setup_buf[i] = p->parameter >> (i*8);
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} |
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s->setup_state = SETUP_STATE_PARAM; |
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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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request = (s->setup_buf[0] << 8) | s->setup_buf[1]; |
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value = (s->setup_buf[3] << 8) | s->setup_buf[2]; |
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index = (s->setup_buf[5] << 8) | s->setup_buf[4]; |
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if (s->setup_len > sizeof(s->data_buf)) { |
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fprintf(stderr, |
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"usb_generic_handle_packet: ctrl buffer too small (%d > %zu)\n",
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s->setup_len, sizeof(s->data_buf));
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return USB_RET_STALL;
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} |
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if (p->pid == USB_TOKEN_OUT) {
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usb_packet_copy(p, s->data_buf, s->setup_len); |
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} |
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ret = usb_device_handle_control(s, p, request, value, index, |
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s->setup_len, s->data_buf); |
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if (ret < 0) { |
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return ret;
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} |
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if (ret < s->setup_len) {
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s->setup_len = ret; |
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} |
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if (p->pid == USB_TOKEN_IN) {
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usb_packet_copy(p, s->data_buf, s->setup_len); |
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} |
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return ret;
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} |
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/* ctrl complete function for devices which use usb_generic_handle_packet and
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may return USB_RET_ASYNC from their handle_control callback. Device code
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which does this *must* call this function instead of the normal
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usb_packet_complete to complete their async control packets. */
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void usb_generic_async_ctrl_complete(USBDevice *s, USBPacket *p)
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{ |
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if (p->result < 0) { |
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s->setup_state = SETUP_STATE_IDLE; |
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} |
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switch (s->setup_state) {
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case SETUP_STATE_SETUP:
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if (p->result < s->setup_len) {
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s->setup_len = p->result; |
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} |
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s->setup_state = SETUP_STATE_DATA; |
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p->result = 8;
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break;
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case SETUP_STATE_ACK:
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s->setup_state = SETUP_STATE_IDLE; |
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p->result = 0;
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break;
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case SETUP_STATE_PARAM:
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if (p->result < s->setup_len) {
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s->setup_len = p->result; |
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} |
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if (p->pid == USB_TOKEN_IN) {
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p->result = 0;
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usb_packet_copy(p, s->data_buf, s->setup_len); |
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} |
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break;
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default:
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break;
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} |
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usb_packet_complete(s, p); |
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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 + 2; |
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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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USBDevice *usb_find_device(USBPort *port, uint8_t addr) |
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{ |
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USBDevice *dev = port->dev; |
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if (dev == NULL || !dev->attached || dev->state != USB_STATE_DEFAULT) { |
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return NULL; |
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} |
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if (dev->addr == addr) {
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return dev;
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} |
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return usb_device_find_device(dev, addr);
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} |
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static int usb_process_one(USBPacket *p) |
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{ |
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USBDevice *dev = p->ep->dev; |
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if (p->ep->nr == 0) { |
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/* control pipe */
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if (p->parameter) {
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return do_parameter(dev, p);
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} |
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switch (p->pid) {
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case USB_TOKEN_SETUP:
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return do_token_setup(dev, p);
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case USB_TOKEN_IN:
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return do_token_in(dev, p);
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case USB_TOKEN_OUT:
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return do_token_out(dev, p);
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default:
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return USB_RET_STALL;
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} |
363 |
} else {
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/* data pipe */
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return usb_device_handle_data(dev, p);
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} |
367 |
} |
368 |
|
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/* Hand over a packet to a device for processing. Return value
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USB_RET_ASYNC indicates the processing isn't finished yet, the
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driver will call usb_packet_complete() when done processing it. */
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int usb_handle_packet(USBDevice *dev, USBPacket *p)
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{ |
374 |
int ret;
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|
376 |
if (dev == NULL) { |
377 |
return USB_RET_NODEV;
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} |
379 |
assert(dev == p->ep->dev); |
380 |
assert(dev->state == USB_STATE_DEFAULT); |
381 |
usb_packet_check_state(p, USB_PACKET_SETUP); |
382 |
assert(p->ep != NULL);
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383 |
|
384 |
if (QTAILQ_EMPTY(&p->ep->queue) || p->ep->pipeline) {
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ret = usb_process_one(p); |
386 |
if (ret == USB_RET_ASYNC) {
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usb_packet_set_state(p, USB_PACKET_ASYNC); |
388 |
QTAILQ_INSERT_TAIL(&p->ep->queue, p, queue); |
389 |
} else {
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390 |
p->result = ret; |
391 |
usb_packet_set_state(p, USB_PACKET_COMPLETE); |
392 |
} |
393 |
} else {
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394 |
ret = USB_RET_ASYNC; |
395 |
usb_packet_set_state(p, USB_PACKET_QUEUED); |
396 |
QTAILQ_INSERT_TAIL(&p->ep->queue, p, queue); |
397 |
} |
398 |
return ret;
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399 |
} |
400 |
|
401 |
/* Notify the controller that an async packet is complete. This should only
|
402 |
be called for packets previously deferred by returning USB_RET_ASYNC from
|
403 |
handle_packet. */
|
404 |
void usb_packet_complete(USBDevice *dev, USBPacket *p)
|
405 |
{ |
406 |
USBEndpoint *ep = p->ep; |
407 |
int ret;
|
408 |
|
409 |
usb_packet_check_state(p, USB_PACKET_ASYNC); |
410 |
assert(QTAILQ_FIRST(&ep->queue) == p); |
411 |
usb_packet_set_state(p, USB_PACKET_COMPLETE); |
412 |
QTAILQ_REMOVE(&ep->queue, p, queue); |
413 |
dev->port->ops->complete(dev->port, p); |
414 |
|
415 |
while (!QTAILQ_EMPTY(&ep->queue)) {
|
416 |
p = QTAILQ_FIRST(&ep->queue); |
417 |
if (p->state == USB_PACKET_ASYNC) {
|
418 |
break;
|
419 |
} |
420 |
usb_packet_check_state(p, USB_PACKET_QUEUED); |
421 |
ret = usb_process_one(p); |
422 |
if (ret == USB_RET_ASYNC) {
|
423 |
usb_packet_set_state(p, USB_PACKET_ASYNC); |
424 |
break;
|
425 |
} |
426 |
p->result = ret; |
427 |
usb_packet_set_state(p, USB_PACKET_COMPLETE); |
428 |
QTAILQ_REMOVE(&ep->queue, p, queue); |
429 |
dev->port->ops->complete(dev->port, p); |
430 |
} |
431 |
} |
432 |
|
433 |
/* Cancel an active packet. The packed must have been deferred by
|
434 |
returning USB_RET_ASYNC from handle_packet, and not yet
|
435 |
completed. */
|
436 |
void usb_cancel_packet(USBPacket * p)
|
437 |
{ |
438 |
bool callback = (p->state == USB_PACKET_ASYNC);
|
439 |
assert(usb_packet_is_inflight(p)); |
440 |
usb_packet_set_state(p, USB_PACKET_CANCELED); |
441 |
QTAILQ_REMOVE(&p->ep->queue, p, queue); |
442 |
if (callback) {
|
443 |
usb_device_cancel_packet(p->ep->dev, p); |
444 |
} |
445 |
} |
446 |
|
447 |
|
448 |
void usb_packet_init(USBPacket *p)
|
449 |
{ |
450 |
qemu_iovec_init(&p->iov, 1);
|
451 |
} |
452 |
|
453 |
static const char *usb_packet_state_name(USBPacketState state) |
454 |
{ |
455 |
static const char *name[] = { |
456 |
[USB_PACKET_UNDEFINED] = "undef",
|
457 |
[USB_PACKET_SETUP] = "setup",
|
458 |
[USB_PACKET_QUEUED] = "queued",
|
459 |
[USB_PACKET_ASYNC] = "async",
|
460 |
[USB_PACKET_COMPLETE] = "complete",
|
461 |
[USB_PACKET_CANCELED] = "canceled",
|
462 |
}; |
463 |
if (state < ARRAY_SIZE(name)) {
|
464 |
return name[state];
|
465 |
} |
466 |
return "INVALID"; |
467 |
} |
468 |
|
469 |
void usb_packet_check_state(USBPacket *p, USBPacketState expected)
|
470 |
{ |
471 |
USBDevice *dev; |
472 |
USBBus *bus; |
473 |
|
474 |
if (p->state == expected) {
|
475 |
return;
|
476 |
} |
477 |
dev = p->ep->dev; |
478 |
bus = usb_bus_from_device(dev); |
479 |
trace_usb_packet_state_fault(bus->busnr, dev->port->path, p->ep->nr, p, |
480 |
usb_packet_state_name(p->state), |
481 |
usb_packet_state_name(expected)); |
482 |
assert(!"usb packet state check failed");
|
483 |
} |
484 |
|
485 |
void usb_packet_set_state(USBPacket *p, USBPacketState state)
|
486 |
{ |
487 |
if (p->ep) {
|
488 |
USBDevice *dev = p->ep->dev; |
489 |
USBBus *bus = usb_bus_from_device(dev); |
490 |
trace_usb_packet_state_change(bus->busnr, dev->port->path, p->ep->nr, p, |
491 |
usb_packet_state_name(p->state), |
492 |
usb_packet_state_name(state)); |
493 |
} else {
|
494 |
trace_usb_packet_state_change(-1, "", -1, p, |
495 |
usb_packet_state_name(p->state), |
496 |
usb_packet_state_name(state)); |
497 |
} |
498 |
p->state = state; |
499 |
} |
500 |
|
501 |
void usb_packet_setup(USBPacket *p, int pid, USBEndpoint *ep) |
502 |
{ |
503 |
assert(!usb_packet_is_inflight(p)); |
504 |
p->pid = pid; |
505 |
p->ep = ep; |
506 |
p->result = 0;
|
507 |
p->parameter = 0;
|
508 |
qemu_iovec_reset(&p->iov); |
509 |
usb_packet_set_state(p, USB_PACKET_SETUP); |
510 |
} |
511 |
|
512 |
void usb_packet_addbuf(USBPacket *p, void *ptr, size_t len) |
513 |
{ |
514 |
qemu_iovec_add(&p->iov, ptr, len); |
515 |
} |
516 |
|
517 |
void usb_packet_copy(USBPacket *p, void *ptr, size_t bytes) |
518 |
{ |
519 |
assert(p->result >= 0);
|
520 |
assert(p->result + bytes <= p->iov.size); |
521 |
switch (p->pid) {
|
522 |
case USB_TOKEN_SETUP:
|
523 |
case USB_TOKEN_OUT:
|
524 |
iov_to_buf(p->iov.iov, p->iov.niov, ptr, p->result, bytes); |
525 |
break;
|
526 |
case USB_TOKEN_IN:
|
527 |
iov_from_buf(p->iov.iov, p->iov.niov, ptr, p->result, bytes); |
528 |
break;
|
529 |
default:
|
530 |
fprintf(stderr, "%s: invalid pid: %x\n", __func__, p->pid);
|
531 |
abort(); |
532 |
} |
533 |
p->result += bytes; |
534 |
} |
535 |
|
536 |
void usb_packet_skip(USBPacket *p, size_t bytes)
|
537 |
{ |
538 |
assert(p->result >= 0);
|
539 |
assert(p->result + bytes <= p->iov.size); |
540 |
if (p->pid == USB_TOKEN_IN) {
|
541 |
iov_clear(p->iov.iov, p->iov.niov, p->result, bytes); |
542 |
} |
543 |
p->result += bytes; |
544 |
} |
545 |
|
546 |
void usb_packet_cleanup(USBPacket *p)
|
547 |
{ |
548 |
assert(!usb_packet_is_inflight(p)); |
549 |
qemu_iovec_destroy(&p->iov); |
550 |
} |
551 |
|
552 |
void usb_ep_init(USBDevice *dev)
|
553 |
{ |
554 |
int ep;
|
555 |
|
556 |
dev->ep_ctl.nr = 0;
|
557 |
dev->ep_ctl.type = USB_ENDPOINT_XFER_CONTROL; |
558 |
dev->ep_ctl.ifnum = 0;
|
559 |
dev->ep_ctl.dev = dev; |
560 |
dev->ep_ctl.pipeline = false;
|
561 |
QTAILQ_INIT(&dev->ep_ctl.queue); |
562 |
for (ep = 0; ep < USB_MAX_ENDPOINTS; ep++) { |
563 |
dev->ep_in[ep].nr = ep + 1;
|
564 |
dev->ep_out[ep].nr = ep + 1;
|
565 |
dev->ep_in[ep].pid = USB_TOKEN_IN; |
566 |
dev->ep_out[ep].pid = USB_TOKEN_OUT; |
567 |
dev->ep_in[ep].type = USB_ENDPOINT_XFER_INVALID; |
568 |
dev->ep_out[ep].type = USB_ENDPOINT_XFER_INVALID; |
569 |
dev->ep_in[ep].ifnum = 0;
|
570 |
dev->ep_out[ep].ifnum = 0;
|
571 |
dev->ep_in[ep].dev = dev; |
572 |
dev->ep_out[ep].dev = dev; |
573 |
dev->ep_in[ep].pipeline = false;
|
574 |
dev->ep_out[ep].pipeline = false;
|
575 |
QTAILQ_INIT(&dev->ep_in[ep].queue); |
576 |
QTAILQ_INIT(&dev->ep_out[ep].queue); |
577 |
} |
578 |
} |
579 |
|
580 |
void usb_ep_dump(USBDevice *dev)
|
581 |
{ |
582 |
static const char *tname[] = { |
583 |
[USB_ENDPOINT_XFER_CONTROL] = "control",
|
584 |
[USB_ENDPOINT_XFER_ISOC] = "isoc",
|
585 |
[USB_ENDPOINT_XFER_BULK] = "bulk",
|
586 |
[USB_ENDPOINT_XFER_INT] = "int",
|
587 |
}; |
588 |
int ifnum, ep, first;
|
589 |
|
590 |
fprintf(stderr, "Device \"%s\", config %d\n",
|
591 |
dev->product_desc, dev->configuration); |
592 |
for (ifnum = 0; ifnum < 16; ifnum++) { |
593 |
first = 1;
|
594 |
for (ep = 0; ep < USB_MAX_ENDPOINTS; ep++) { |
595 |
if (dev->ep_in[ep].type != USB_ENDPOINT_XFER_INVALID &&
|
596 |
dev->ep_in[ep].ifnum == ifnum) { |
597 |
if (first) {
|
598 |
first = 0;
|
599 |
fprintf(stderr, " Interface %d, alternative %d\n",
|
600 |
ifnum, dev->altsetting[ifnum]); |
601 |
} |
602 |
fprintf(stderr, " Endpoint %d, IN, %s, %d max\n", ep,
|
603 |
tname[dev->ep_in[ep].type], |
604 |
dev->ep_in[ep].max_packet_size); |
605 |
} |
606 |
if (dev->ep_out[ep].type != USB_ENDPOINT_XFER_INVALID &&
|
607 |
dev->ep_out[ep].ifnum == ifnum) { |
608 |
if (first) {
|
609 |
first = 0;
|
610 |
fprintf(stderr, " Interface %d, alternative %d\n",
|
611 |
ifnum, dev->altsetting[ifnum]); |
612 |
} |
613 |
fprintf(stderr, " Endpoint %d, OUT, %s, %d max\n", ep,
|
614 |
tname[dev->ep_out[ep].type], |
615 |
dev->ep_out[ep].max_packet_size); |
616 |
} |
617 |
} |
618 |
} |
619 |
fprintf(stderr, "--\n");
|
620 |
} |
621 |
|
622 |
struct USBEndpoint *usb_ep_get(USBDevice *dev, int pid, int ep) |
623 |
{ |
624 |
struct USBEndpoint *eps;
|
625 |
|
626 |
if (dev == NULL) { |
627 |
return NULL; |
628 |
} |
629 |
eps = (pid == USB_TOKEN_IN) ? dev->ep_in : dev->ep_out; |
630 |
if (ep == 0) { |
631 |
return &dev->ep_ctl;
|
632 |
} |
633 |
assert(pid == USB_TOKEN_IN || pid == USB_TOKEN_OUT); |
634 |
assert(ep > 0 && ep <= USB_MAX_ENDPOINTS);
|
635 |
return eps + ep - 1; |
636 |
} |
637 |
|
638 |
uint8_t usb_ep_get_type(USBDevice *dev, int pid, int ep) |
639 |
{ |
640 |
struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
|
641 |
return uep->type;
|
642 |
} |
643 |
|
644 |
void usb_ep_set_type(USBDevice *dev, int pid, int ep, uint8_t type) |
645 |
{ |
646 |
struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
|
647 |
uep->type = type; |
648 |
} |
649 |
|
650 |
uint8_t usb_ep_get_ifnum(USBDevice *dev, int pid, int ep) |
651 |
{ |
652 |
struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
|
653 |
return uep->ifnum;
|
654 |
} |
655 |
|
656 |
void usb_ep_set_ifnum(USBDevice *dev, int pid, int ep, uint8_t ifnum) |
657 |
{ |
658 |
struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
|
659 |
uep->ifnum = ifnum; |
660 |
} |
661 |
|
662 |
void usb_ep_set_max_packet_size(USBDevice *dev, int pid, int ep, |
663 |
uint16_t raw) |
664 |
{ |
665 |
struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
|
666 |
int size, microframes;
|
667 |
|
668 |
size = raw & 0x7ff;
|
669 |
switch ((raw >> 11) & 3) { |
670 |
case 1: |
671 |
microframes = 2;
|
672 |
break;
|
673 |
case 2: |
674 |
microframes = 3;
|
675 |
break;
|
676 |
default:
|
677 |
microframes = 1;
|
678 |
break;
|
679 |
} |
680 |
uep->max_packet_size = size * microframes; |
681 |
} |
682 |
|
683 |
int usb_ep_get_max_packet_size(USBDevice *dev, int pid, int ep) |
684 |
{ |
685 |
struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
|
686 |
return uep->max_packet_size;
|
687 |
} |
688 |
|
689 |
void usb_ep_set_pipeline(USBDevice *dev, int pid, int ep, bool enabled) |
690 |
{ |
691 |
struct USBEndpoint *uep = usb_ep_get(dev, pid, ep);
|
692 |
uep->pipeline = enabled; |
693 |
} |