diff options
Diffstat (limited to 'src/hw/usb/core.c')
| -rw-r--r-- | src/hw/usb/core.c | 794 |
1 files changed, 794 insertions, 0 deletions
diff --git a/src/hw/usb/core.c b/src/hw/usb/core.c new file mode 100644 index 0000000..7f46370 --- /dev/null +++ b/src/hw/usb/core.c @@ -0,0 +1,794 @@ +/* + * QEMU USB emulation + * + * Copyright (c) 2005 Fabrice Bellard + * + * 2008 Generic packet handler rewrite by Max Krasnyansky + * + * 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 "hw/usb.h" +#include "qemu/iov.h" +#include "trace.h" + +void usb_pick_speed(USBPort *port) +{ + static const int speeds[] = { + USB_SPEED_SUPER, + USB_SPEED_HIGH, + USB_SPEED_FULL, + USB_SPEED_LOW, + }; + USBDevice *udev = port->dev; + int i; + + for (i = 0; i < ARRAY_SIZE(speeds); i++) { + if ((udev->speedmask & (1 << speeds[i])) && + (port->speedmask & (1 << speeds[i]))) { + udev->speed = speeds[i]; + return; + } + } +} + +void usb_attach(USBPort *port) +{ + USBDevice *dev = port->dev; + + assert(dev != NULL); + assert(dev->attached); + assert(dev->state == USB_STATE_NOTATTACHED); + usb_pick_speed(port); + port->ops->attach(port); + dev->state = USB_STATE_ATTACHED; + usb_device_handle_attach(dev); +} + +void usb_detach(USBPort *port) +{ + USBDevice *dev = port->dev; + + assert(dev != NULL); + assert(dev->state != USB_STATE_NOTATTACHED); + port->ops->detach(port); + dev->state = USB_STATE_NOTATTACHED; +} + +void usb_port_reset(USBPort *port) +{ + USBDevice *dev = port->dev; + + assert(dev != NULL); + usb_detach(port); + usb_attach(port); + usb_device_reset(dev); +} + +void usb_device_reset(USBDevice *dev) +{ + if (dev == NULL || !dev->attached) { + return; + } + dev->remote_wakeup = 0; + dev->addr = 0; + dev->state = USB_STATE_DEFAULT; + usb_device_handle_reset(dev); +} + +void usb_wakeup(USBEndpoint *ep, unsigned int stream) +{ + USBDevice *dev = ep->dev; + USBBus *bus = usb_bus_from_device(dev); + + if (dev->remote_wakeup && dev->port && dev->port->ops->wakeup) { + dev->port->ops->wakeup(dev->port); + } + if (bus->ops->wakeup_endpoint) { + bus->ops->wakeup_endpoint(bus, ep, stream); + } +} + +/**********************/ + +/* 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_SETUP 1 +#define SETUP_STATE_DATA 2 +#define SETUP_STATE_ACK 3 +#define SETUP_STATE_PARAM 4 + +static void do_token_setup(USBDevice *s, USBPacket *p) +{ + int request, value, index; + + if (p->iov.size != 8) { + p->status = USB_RET_STALL; + return; + } + + usb_packet_copy(p, s->setup_buf, p->iov.size); + s->setup_index = 0; + p->actual_length = 0; + s->setup_len = (s->setup_buf[7] << 8) | s->setup_buf[6]; + if (s->setup_len > sizeof(s->data_buf)) { + fprintf(stderr, + "usb_generic_handle_packet: ctrl buffer too small (%d > %zu)\n", + s->setup_len, sizeof(s->data_buf)); + p->status = USB_RET_STALL; + return; + } + + request = (s->setup_buf[0] << 8) | s->setup_buf[1]; + value = (s->setup_buf[3] << 8) | s->setup_buf[2]; + index = (s->setup_buf[5] << 8) | s->setup_buf[4]; + + if (s->setup_buf[0] & USB_DIR_IN) { + usb_device_handle_control(s, p, request, value, index, + s->setup_len, s->data_buf); + if (p->status == USB_RET_ASYNC) { + s->setup_state = SETUP_STATE_SETUP; + } + if (p->status != USB_RET_SUCCESS) { + return; + } + + if (p->actual_length < s->setup_len) { + s->setup_len = p->actual_length; + } + 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; + } + + p->actual_length = 8; +} + +static void do_token_in(USBDevice *s, USBPacket *p) +{ + int request, value, index; + + assert(p->ep->nr == 0); + + request = (s->setup_buf[0] << 8) | s->setup_buf[1]; + value = (s->setup_buf[3] << 8) | s->setup_buf[2]; + index = (s->setup_buf[5] << 8) | s->setup_buf[4]; + + switch(s->setup_state) { + case SETUP_STATE_ACK: + if (!(s->setup_buf[0] & USB_DIR_IN)) { + usb_device_handle_control(s, p, request, value, index, + s->setup_len, s->data_buf); + if (p->status == USB_RET_ASYNC) { + return; + } + s->setup_state = SETUP_STATE_IDLE; + p->actual_length = 0; + } + break; + + case SETUP_STATE_DATA: + if (s->setup_buf[0] & USB_DIR_IN) { + int len = s->setup_len - s->setup_index; + if (len > p->iov.size) { + len = p->iov.size; + } + usb_packet_copy(p, s->data_buf + s->setup_index, len); + s->setup_index += len; + if (s->setup_index >= s->setup_len) { + s->setup_state = SETUP_STATE_ACK; + } + return; + } + s->setup_state = SETUP_STATE_IDLE; + p->status = USB_RET_STALL; + break; + + default: + p->status = USB_RET_STALL; + } +} + +static void do_token_out(USBDevice *s, USBPacket *p) +{ + assert(p->ep->nr == 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)) { + int len = s->setup_len - s->setup_index; + if (len > p->iov.size) { + len = p->iov.size; + } + usb_packet_copy(p, s->data_buf + s->setup_index, len); + s->setup_index += len; + if (s->setup_index >= s->setup_len) { + s->setup_state = SETUP_STATE_ACK; + } + return; + } + s->setup_state = SETUP_STATE_IDLE; + p->status = USB_RET_STALL; + break; + + default: + p->status = USB_RET_STALL; + } +} + +static void do_parameter(USBDevice *s, USBPacket *p) +{ + int i, request, value, index; + + for (i = 0; i < 8; i++) { + s->setup_buf[i] = p->parameter >> (i*8); + } + + s->setup_state = SETUP_STATE_PARAM; + s->setup_len = (s->setup_buf[7] << 8) | s->setup_buf[6]; + s->setup_index = 0; + + request = (s->setup_buf[0] << 8) | s->setup_buf[1]; + value = (s->setup_buf[3] << 8) | s->setup_buf[2]; + index = (s->setup_buf[5] << 8) | s->setup_buf[4]; + + if (s->setup_len > sizeof(s->data_buf)) { + fprintf(stderr, + "usb_generic_handle_packet: ctrl buffer too small (%d > %zu)\n", + s->setup_len, sizeof(s->data_buf)); + p->status = USB_RET_STALL; + return; + } + + if (p->pid == USB_TOKEN_OUT) { + usb_packet_copy(p, s->data_buf, s->setup_len); + } + + usb_device_handle_control(s, p, request, value, index, + s->setup_len, s->data_buf); + if (p->status == USB_RET_ASYNC) { + return; + } + + if (p->actual_length < s->setup_len) { + s->setup_len = p->actual_length; + } + if (p->pid == USB_TOKEN_IN) { + p->actual_length = 0; + usb_packet_copy(p, s->data_buf, s->setup_len); + } +} + +/* ctrl complete function for devices which use usb_generic_handle_packet and + may return USB_RET_ASYNC from their handle_control callback. Device code + which does this *must* call this function instead of the normal + usb_packet_complete to complete their async control packets. */ +void usb_generic_async_ctrl_complete(USBDevice *s, USBPacket *p) +{ + if (p->status < 0) { + s->setup_state = SETUP_STATE_IDLE; + } + + switch (s->setup_state) { + case SETUP_STATE_SETUP: + if (p->actual_length < s->setup_len) { + s->setup_len = p->actual_length; + } + s->setup_state = SETUP_STATE_DATA; + p->actual_length = 8; + break; + + case SETUP_STATE_ACK: + s->setup_state = SETUP_STATE_IDLE; + p->actual_length = 0; + break; + + case SETUP_STATE_PARAM: + if (p->actual_length < s->setup_len) { + s->setup_len = p->actual_length; + } + if (p->pid == USB_TOKEN_IN) { + p->actual_length = 0; + usb_packet_copy(p, s->data_buf, s->setup_len); + } + break; + + default: + break; + } + usb_packet_complete(s, p); +} + +USBDevice *usb_find_device(USBPort *port, uint8_t addr) +{ + USBDevice *dev = port->dev; + + if (dev == NULL || !dev->attached || dev->state != USB_STATE_DEFAULT) { + return NULL; + } + if (dev->addr == addr) { + return dev; + } + return usb_device_find_device(dev, addr); +} + +static void usb_process_one(USBPacket *p) +{ + USBDevice *dev = p->ep->dev; + + /* + * Handlers expect status to be initialized to USB_RET_SUCCESS, but it + * can be USB_RET_NAK here from a previous usb_process_one() call, + * or USB_RET_ASYNC from going through usb_queue_one(). + */ + p->status = USB_RET_SUCCESS; + + if (p->ep->nr == 0) { + /* control pipe */ + if (p->parameter) { + do_parameter(dev, p); + return; + } + switch (p->pid) { + case USB_TOKEN_SETUP: + do_token_setup(dev, p); + break; + case USB_TOKEN_IN: + do_token_in(dev, p); + break; + case USB_TOKEN_OUT: + do_token_out(dev, p); + break; + default: + p->status = USB_RET_STALL; + } + } else { + /* data pipe */ + usb_device_handle_data(dev, p); + } +} + +static void usb_queue_one(USBPacket *p) +{ + usb_packet_set_state(p, USB_PACKET_QUEUED); + QTAILQ_INSERT_TAIL(&p->ep->queue, p, queue); + p->status = USB_RET_ASYNC; +} + +/* Hand over a packet to a device for processing. p->status == + USB_RET_ASYNC indicates the processing isn't finished yet, the + driver will call usb_packet_complete() when done processing it. */ +void usb_handle_packet(USBDevice *dev, USBPacket *p) +{ + if (dev == NULL) { + p->status = USB_RET_NODEV; + return; + } + assert(dev == p->ep->dev); + assert(dev->state == USB_STATE_DEFAULT); + usb_packet_check_state(p, USB_PACKET_SETUP); + assert(p->ep != NULL); + + /* Submitting a new packet clears halt */ + if (p->ep->halted) { + assert(QTAILQ_EMPTY(&p->ep->queue)); + p->ep->halted = false; + } + + if (QTAILQ_EMPTY(&p->ep->queue) || p->ep->pipeline || p->stream) { + usb_process_one(p); + if (p->status == USB_RET_ASYNC) { + /* hcd drivers cannot handle async for isoc */ + assert(p->ep->type != USB_ENDPOINT_XFER_ISOC); + /* using async for interrupt packets breaks migration */ + assert(p->ep->type != USB_ENDPOINT_XFER_INT || + (dev->flags & (1 << USB_DEV_FLAG_IS_HOST))); + usb_packet_set_state(p, USB_PACKET_ASYNC); + QTAILQ_INSERT_TAIL(&p->ep->queue, p, queue); + } else if (p->status == USB_RET_ADD_TO_QUEUE) { + usb_queue_one(p); + } else { + /* + * When pipelining is enabled usb-devices must always return async, + * otherwise packets can complete out of order! + */ + assert(p->stream || !p->ep->pipeline || + QTAILQ_EMPTY(&p->ep->queue)); + if (p->status != USB_RET_NAK) { + usb_packet_set_state(p, USB_PACKET_COMPLETE); + } + } + } else { + usb_queue_one(p); + } +} + +void usb_packet_complete_one(USBDevice *dev, USBPacket *p) +{ + USBEndpoint *ep = p->ep; + + assert(p->stream || QTAILQ_FIRST(&ep->queue) == p); + assert(p->status != USB_RET_ASYNC && p->status != USB_RET_NAK); + + if (p->status != USB_RET_SUCCESS || + (p->short_not_ok && (p->actual_length < p->iov.size))) { + ep->halted = true; + } + usb_packet_set_state(p, USB_PACKET_COMPLETE); + QTAILQ_REMOVE(&ep->queue, p, queue); + dev->port->ops->complete(dev->port, p); +} + +/* Notify the controller that an async packet is complete. This should only + be called for packets previously deferred by returning USB_RET_ASYNC from + handle_packet. */ +void usb_packet_complete(USBDevice *dev, USBPacket *p) +{ + USBEndpoint *ep = p->ep; + + usb_packet_check_state(p, USB_PACKET_ASYNC); + usb_packet_complete_one(dev, p); + + while (!QTAILQ_EMPTY(&ep->queue)) { + p = QTAILQ_FIRST(&ep->queue); + if (ep->halted) { + /* Empty the queue on a halt */ + p->status = USB_RET_REMOVE_FROM_QUEUE; + dev->port->ops->complete(dev->port, p); + continue; + } + if (p->state == USB_PACKET_ASYNC) { + break; + } + usb_packet_check_state(p, USB_PACKET_QUEUED); + usb_process_one(p); + if (p->status == USB_RET_ASYNC) { + usb_packet_set_state(p, USB_PACKET_ASYNC); + break; + } + usb_packet_complete_one(ep->dev, p); + } +} + +/* Cancel an active packet. The packed must have been deferred by + returning USB_RET_ASYNC from handle_packet, and not yet + completed. */ +void usb_cancel_packet(USBPacket * p) +{ + bool callback = (p->state == USB_PACKET_ASYNC); + assert(usb_packet_is_inflight(p)); + usb_packet_set_state(p, USB_PACKET_CANCELED); + QTAILQ_REMOVE(&p->ep->queue, p, queue); + if (callback) { + usb_device_cancel_packet(p->ep->dev, p); + } +} + + +void usb_packet_init(USBPacket *p) +{ + qemu_iovec_init(&p->iov, 1); +} + +static const char *usb_packet_state_name(USBPacketState state) +{ + static const char *name[] = { + [USB_PACKET_UNDEFINED] = "undef", + [USB_PACKET_SETUP] = "setup", + [USB_PACKET_QUEUED] = "queued", + [USB_PACKET_ASYNC] = "async", + [USB_PACKET_COMPLETE] = "complete", + [USB_PACKET_CANCELED] = "canceled", + }; + if (state < ARRAY_SIZE(name)) { + return name[state]; + } + return "INVALID"; +} + +void usb_packet_check_state(USBPacket *p, USBPacketState expected) +{ + USBDevice *dev; + USBBus *bus; + + if (p->state == expected) { + return; + } + dev = p->ep->dev; + bus = usb_bus_from_device(dev); + trace_usb_packet_state_fault(bus->busnr, dev->port->path, p->ep->nr, p, + usb_packet_state_name(p->state), + usb_packet_state_name(expected)); + assert(!"usb packet state check failed"); +} + +void usb_packet_set_state(USBPacket *p, USBPacketState state) +{ + if (p->ep) { + USBDevice *dev = p->ep->dev; + USBBus *bus = usb_bus_from_device(dev); + trace_usb_packet_state_change(bus->busnr, dev->port->path, p->ep->nr, p, + usb_packet_state_name(p->state), + usb_packet_state_name(state)); + } else { + trace_usb_packet_state_change(-1, "", -1, p, + usb_packet_state_name(p->state), + usb_packet_state_name(state)); + } + p->state = state; +} + +void usb_packet_setup(USBPacket *p, int pid, + USBEndpoint *ep, unsigned int stream, + uint64_t id, bool short_not_ok, bool int_req) +{ + assert(!usb_packet_is_inflight(p)); + assert(p->iov.iov != NULL); + p->id = id; + p->pid = pid; + p->ep = ep; + p->stream = stream; + p->status = USB_RET_SUCCESS; + p->actual_length = 0; + p->parameter = 0; + p->short_not_ok = short_not_ok; + p->int_req = int_req; + p->combined = NULL; + qemu_iovec_reset(&p->iov); + usb_packet_set_state(p, USB_PACKET_SETUP); +} + +void usb_packet_addbuf(USBPacket *p, void *ptr, size_t len) +{ + qemu_iovec_add(&p->iov, ptr, len); +} + +void usb_packet_copy(USBPacket *p, void *ptr, size_t bytes) +{ + QEMUIOVector *iov = p->combined ? &p->combined->iov : &p->iov; + + assert(p->actual_length >= 0); + assert(p->actual_length + bytes <= iov->size); + switch (p->pid) { + case USB_TOKEN_SETUP: + case USB_TOKEN_OUT: + iov_to_buf(iov->iov, iov->niov, p->actual_length, ptr, bytes); + break; + case USB_TOKEN_IN: + iov_from_buf(iov->iov, iov->niov, p->actual_length, ptr, bytes); + break; + default: + fprintf(stderr, "%s: invalid pid: %x\n", __func__, p->pid); + abort(); + } + p->actual_length += bytes; +} + +void usb_packet_skip(USBPacket *p, size_t bytes) +{ + QEMUIOVector *iov = p->combined ? &p->combined->iov : &p->iov; + + assert(p->actual_length >= 0); + assert(p->actual_length + bytes <= iov->size); + if (p->pid == USB_TOKEN_IN) { + iov_memset(iov->iov, iov->niov, p->actual_length, 0, bytes); + } + p->actual_length += bytes; +} + +size_t usb_packet_size(USBPacket *p) +{ + return p->combined ? p->combined->iov.size : p->iov.size; +} + +void usb_packet_cleanup(USBPacket *p) +{ + assert(!usb_packet_is_inflight(p)); + qemu_iovec_destroy(&p->iov); +} + +void usb_ep_reset(USBDevice *dev) +{ + int ep; + + dev->ep_ctl.nr = 0; + dev->ep_ctl.type = USB_ENDPOINT_XFER_CONTROL; + dev->ep_ctl.ifnum = 0; + dev->ep_ctl.max_packet_size = 64; + dev->ep_ctl.max_streams = 0; + dev->ep_ctl.dev = dev; + dev->ep_ctl.pipeline = false; + for (ep = 0; ep < USB_MAX_ENDPOINTS; ep++) { + dev->ep_in[ep].nr = ep + 1; + dev->ep_out[ep].nr = ep + 1; + dev->ep_in[ep].pid = USB_TOKEN_IN; + dev->ep_out[ep].pid = USB_TOKEN_OUT; + dev->ep_in[ep].type = USB_ENDPOINT_XFER_INVALID; + dev->ep_out[ep].type = USB_ENDPOINT_XFER_INVALID; + dev->ep_in[ep].ifnum = USB_INTERFACE_INVALID; + dev->ep_out[ep].ifnum = USB_INTERFACE_INVALID; + dev->ep_in[ep].max_packet_size = 0; + dev->ep_out[ep].max_packet_size = 0; + dev->ep_in[ep].max_streams = 0; + dev->ep_out[ep].max_streams = 0; + dev->ep_in[ep].dev = dev; + dev->ep_out[ep].dev = dev; + dev->ep_in[ep].pipeline = false; + dev->ep_out[ep].pipeline = false; + } +} + +void usb_ep_init(USBDevice *dev) +{ + int ep; + + usb_ep_reset(dev); + QTAILQ_INIT(&dev->ep_ctl.queue); + for (ep = 0; ep < USB_MAX_ENDPOINTS; ep++) { + QTAILQ_INIT(&dev->ep_in[ep].queue); + QTAILQ_INIT(&dev->ep_out[ep].queue); + } +} + +void usb_ep_dump(USBDevice *dev) +{ + static const char *tname[] = { + [USB_ENDPOINT_XFER_CONTROL] = "control", + [USB_ENDPOINT_XFER_ISOC] = "isoc", + [USB_ENDPOINT_XFER_BULK] = "bulk", + [USB_ENDPOINT_XFER_INT] = "int", + }; + int ifnum, ep, first; + + fprintf(stderr, "Device \"%s\", config %d\n", + dev->product_desc, dev->configuration); + for (ifnum = 0; ifnum < 16; ifnum++) { + first = 1; + for (ep = 0; ep < USB_MAX_ENDPOINTS; ep++) { + if (dev->ep_in[ep].type != USB_ENDPOINT_XFER_INVALID && + dev->ep_in[ep].ifnum == ifnum) { + if (first) { + first = 0; + fprintf(stderr, " Interface %d, alternative %d\n", + ifnum, dev->altsetting[ifnum]); + } + fprintf(stderr, " Endpoint %d, IN, %s, %d max\n", ep, + tname[dev->ep_in[ep].type], + dev->ep_in[ep].max_packet_size); + } + if (dev->ep_out[ep].type != USB_ENDPOINT_XFER_INVALID && + dev->ep_out[ep].ifnum == ifnum) { + if (first) { + first = 0; + fprintf(stderr, " Interface %d, alternative %d\n", + ifnum, dev->altsetting[ifnum]); + } + fprintf(stderr, " Endpoint %d, OUT, %s, %d max\n", ep, + tname[dev->ep_out[ep].type], + dev->ep_out[ep].max_packet_size); + } + } + } + fprintf(stderr, "--\n"); +} + +struct USBEndpoint *usb_ep_get(USBDevice *dev, int pid, int ep) +{ + struct USBEndpoint *eps; + + if (dev == NULL) { + return NULL; + } + eps = (pid == USB_TOKEN_IN) ? dev->ep_in : dev->ep_out; + if (ep == 0) { + return &dev->ep_ctl; + } + assert(pid == USB_TOKEN_IN || pid == USB_TOKEN_OUT); + assert(ep > 0 && ep <= USB_MAX_ENDPOINTS); + return eps + ep - 1; +} + +uint8_t usb_ep_get_type(USBDevice *dev, int pid, int ep) +{ + struct USBEndpoint *uep = usb_ep_get(dev, pid, ep); + return uep->type; +} + +void usb_ep_set_type(USBDevice *dev, int pid, int ep, uint8_t type) +{ + struct USBEndpoint *uep = usb_ep_get(dev, pid, ep); + uep->type = type; +} + +void usb_ep_set_ifnum(USBDevice *dev, int pid, int ep, uint8_t ifnum) +{ + struct USBEndpoint *uep = usb_ep_get(dev, pid, ep); + uep->ifnum = ifnum; +} + +void usb_ep_set_max_packet_size(USBDevice *dev, int pid, int ep, + uint16_t raw) +{ + struct USBEndpoint *uep = usb_ep_get(dev, pid, ep); + int size, microframes; + + size = raw & 0x7ff; + switch ((raw >> 11) & 3) { + case 1: + microframes = 2; + break; + case 2: + microframes = 3; + break; + default: + microframes = 1; + break; + } + uep->max_packet_size = size * microframes; +} + +void usb_ep_set_max_streams(USBDevice *dev, int pid, int ep, uint8_t raw) +{ + struct USBEndpoint *uep = usb_ep_get(dev, pid, ep); + int MaxStreams; + + MaxStreams = raw & 0x1f; + if (MaxStreams) { + uep->max_streams = 1 << MaxStreams; + } else { + uep->max_streams = 0; + } +} + +void usb_ep_set_halted(USBDevice *dev, int pid, int ep, bool halted) +{ + struct USBEndpoint *uep = usb_ep_get(dev, pid, ep); + uep->halted = halted; +} + +USBPacket *usb_ep_find_packet_by_id(USBDevice *dev, int pid, int ep, + uint64_t id) +{ + struct USBEndpoint *uep = usb_ep_get(dev, pid, ep); + USBPacket *p; + + QTAILQ_FOREACH(p, &uep->queue, queue) { + if (p->id == id) { + return p; + } + } + + return NULL; +} |
