2 * QEMU USB HUB emulation
4 * Copyright (c) 2005 Fabrice Bellard
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24 #include "qemu-common.h"
32 typedef struct USBHubPort {
38 typedef struct USBHubState {
40 USBHubPort ports[NUM_PORTS];
43 #define ClearHubFeature (0x2000 | USB_REQ_CLEAR_FEATURE)
44 #define ClearPortFeature (0x2300 | USB_REQ_CLEAR_FEATURE)
45 #define GetHubDescriptor (0xa000 | USB_REQ_GET_DESCRIPTOR)
46 #define GetHubStatus (0xa000 | USB_REQ_GET_STATUS)
47 #define GetPortStatus (0xa300 | USB_REQ_GET_STATUS)
48 #define SetHubFeature (0x2000 | USB_REQ_SET_FEATURE)
49 #define SetPortFeature (0x2300 | USB_REQ_SET_FEATURE)
51 #define PORT_STAT_CONNECTION 0x0001
52 #define PORT_STAT_ENABLE 0x0002
53 #define PORT_STAT_SUSPEND 0x0004
54 #define PORT_STAT_OVERCURRENT 0x0008
55 #define PORT_STAT_RESET 0x0010
56 #define PORT_STAT_POWER 0x0100
57 #define PORT_STAT_LOW_SPEED 0x0200
58 #define PORT_STAT_HIGH_SPEED 0x0400
59 #define PORT_STAT_TEST 0x0800
60 #define PORT_STAT_INDICATOR 0x1000
62 #define PORT_STAT_C_CONNECTION 0x0001
63 #define PORT_STAT_C_ENABLE 0x0002
64 #define PORT_STAT_C_SUSPEND 0x0004
65 #define PORT_STAT_C_OVERCURRENT 0x0008
66 #define PORT_STAT_C_RESET 0x0010
68 #define PORT_CONNECTION 0
70 #define PORT_SUSPEND 2
71 #define PORT_OVERCURRENT 3
74 #define PORT_LOWSPEED 9
75 #define PORT_HIGHSPEED 10
76 #define PORT_C_CONNECTION 16
77 #define PORT_C_ENABLE 17
78 #define PORT_C_SUSPEND 18
79 #define PORT_C_OVERCURRENT 19
80 #define PORT_C_RESET 20
82 #define PORT_INDICATOR 22
84 /* same as Linux kernel root hubs */
92 static const USBDescStrings desc_strings = {
93 [STR_MANUFACTURER] = "QEMU " QEMU_VERSION,
94 [STR_PRODUCT] = "QEMU USB Hub",
95 [STR_SERIALNUMBER] = "314159",
98 static const USBDescIface desc_iface_hub = {
99 .bInterfaceNumber = 0,
101 .bInterfaceClass = USB_CLASS_HUB,
102 .eps = (USBDescEndpoint[]) {
104 .bEndpointAddress = USB_DIR_IN | 0x01,
105 .bmAttributes = USB_ENDPOINT_XFER_INT,
106 .wMaxPacketSize = 1 + (NUM_PORTS + 7) / 8,
112 static const USBDescDevice desc_device_hub = {
114 .bDeviceClass = USB_CLASS_HUB,
115 .bMaxPacketSize0 = 8,
116 .bNumConfigurations = 1,
117 .confs = (USBDescConfig[]) {
120 .bConfigurationValue = 1,
121 .bmAttributes = 0xe0,
123 .ifs = &desc_iface_hub,
128 static const USBDesc desc_hub = {
133 .iManufacturer = STR_MANUFACTURER,
134 .iProduct = STR_PRODUCT,
135 .iSerialNumber = STR_SERIALNUMBER,
137 .full = &desc_device_hub,
141 static const uint8_t qemu_hub_hub_descriptor[] =
143 0x00, /* u8 bLength; patched in later */
144 0x29, /* u8 bDescriptorType; Hub-descriptor */
145 0x00, /* u8 bNbrPorts; (patched later) */
146 0x0a, /* u16 wHubCharacteristics; */
147 0x00, /* (per-port OC, no power switching) */
148 0x01, /* u8 bPwrOn2pwrGood; 2ms */
149 0x00 /* u8 bHubContrCurrent; 0 mA */
151 /* DeviceRemovable and PortPwrCtrlMask patched in later */
154 static void usb_hub_attach(USBPort *port1)
156 USBHubState *s = port1->opaque;
157 USBHubPort *port = &s->ports[port1->index];
159 port->wPortStatus |= PORT_STAT_CONNECTION;
160 port->wPortChange |= PORT_STAT_C_CONNECTION;
161 if (port->port.dev->speed == USB_SPEED_LOW) {
162 port->wPortStatus |= PORT_STAT_LOW_SPEED;
164 port->wPortStatus &= ~PORT_STAT_LOW_SPEED;
169 static void usb_hub_detach(USBPort *port1)
171 USBHubState *s = port1->opaque;
172 USBHubPort *port = &s->ports[port1->index];
176 /* Let upstream know the device on this port is gone */
177 s->dev.port->ops->child_detach(s->dev.port, port1->dev);
179 port->wPortStatus &= ~PORT_STAT_CONNECTION;
180 port->wPortChange |= PORT_STAT_C_CONNECTION;
181 if (port->wPortStatus & PORT_STAT_ENABLE) {
182 port->wPortStatus &= ~PORT_STAT_ENABLE;
183 port->wPortChange |= PORT_STAT_C_ENABLE;
187 static void usb_hub_child_detach(USBPort *port1, USBDevice *child)
189 USBHubState *s = port1->opaque;
191 /* Pass along upstream */
192 s->dev.port->ops->child_detach(s->dev.port, child);
195 static void usb_hub_wakeup(USBPort *port1)
197 USBHubState *s = port1->opaque;
198 USBHubPort *port = &s->ports[port1->index];
200 if (port->wPortStatus & PORT_STAT_SUSPEND) {
201 port->wPortChange |= PORT_STAT_C_SUSPEND;
206 static void usb_hub_complete(USBPort *port, USBPacket *packet)
208 USBHubState *s = port->opaque;
211 * Just pass it along upstream for now.
213 * If we ever implement usb 2.0 split transactions this will
214 * become a little more complicated ...
216 * Can't use usb_packet_complete() here because packet->owner is
217 * cleared already, go call the ->complete() callback directly
220 s->dev.port->ops->complete(s->dev.port, packet);
223 static void usb_hub_handle_reset(USBDevice *dev)
225 USBHubState *s = DO_UPCAST(USBHubState, dev, dev);
229 for (i = 0; i < NUM_PORTS; i++) {
231 port->wPortStatus = PORT_STAT_POWER;
232 port->wPortChange = 0;
233 if (port->port.dev && port->port.dev->attached) {
234 port->wPortStatus |= PORT_STAT_CONNECTION;
235 port->wPortChange |= PORT_STAT_C_CONNECTION;
236 if (port->port.dev->speed == USB_SPEED_LOW) {
237 port->wPortStatus |= PORT_STAT_LOW_SPEED;
243 static int usb_hub_handle_control(USBDevice *dev, USBPacket *p,
244 int request, int value, int index, int length, uint8_t *data)
246 USBHubState *s = (USBHubState *)dev;
249 ret = usb_desc_handle_control(dev, p, request, value, index, length, data);
255 case EndpointOutRequest | USB_REQ_CLEAR_FEATURE:
256 if (value == 0 && index != 0x81) { /* clear ep halt */
261 /* usb specific requests */
271 unsigned int n = index - 1;
273 if (n >= NUM_PORTS) {
277 data[0] = port->wPortStatus;
278 data[1] = port->wPortStatus >> 8;
279 data[2] = port->wPortChange;
280 data[3] = port->wPortChange >> 8;
285 case ClearHubFeature:
286 if (value == 0 || value == 1) {
294 unsigned int n = index - 1;
297 if (n >= NUM_PORTS) {
301 dev = port->port.dev;
304 port->wPortStatus |= PORT_STAT_SUSPEND;
307 if (dev && dev->attached) {
308 usb_send_msg(dev, USB_MSG_RESET);
309 port->wPortChange |= PORT_STAT_C_RESET;
311 port->wPortStatus |= PORT_STAT_ENABLE;
322 case ClearPortFeature:
324 unsigned int n = index - 1;
327 if (n >= NUM_PORTS) {
333 port->wPortStatus &= ~PORT_STAT_ENABLE;
336 port->wPortChange &= ~PORT_STAT_C_ENABLE;
339 port->wPortStatus &= ~PORT_STAT_SUSPEND;
342 port->wPortChange &= ~PORT_STAT_C_SUSPEND;
344 case PORT_C_CONNECTION:
345 port->wPortChange &= ~PORT_STAT_C_CONNECTION;
347 case PORT_C_OVERCURRENT:
348 port->wPortChange &= ~PORT_STAT_C_OVERCURRENT;
351 port->wPortChange &= ~PORT_STAT_C_RESET;
359 case GetHubDescriptor:
361 unsigned int n, limit, var_hub_size = 0;
362 memcpy(data, qemu_hub_hub_descriptor,
363 sizeof(qemu_hub_hub_descriptor));
366 /* fill DeviceRemovable bits */
367 limit = ((NUM_PORTS + 1 + 7) / 8) + 7;
368 for (n = 7; n < limit; n++) {
373 /* fill PortPwrCtrlMask bits */
374 limit = limit + ((NUM_PORTS + 7) / 8);
375 for (;n < limit; n++) {
380 ret = sizeof(qemu_hub_hub_descriptor) + var_hub_size;
392 static int usb_hub_handle_data(USBDevice *dev, USBPacket *p)
394 USBHubState *s = (USBHubState *)dev;
404 n = (NUM_PORTS + 1 + 7) / 8;
405 if (p->iov.size == 1) { /* FreeBSD workaround */
407 } else if (n > p->iov.size) {
408 return USB_RET_BABBLE;
411 for(i = 0; i < NUM_PORTS; i++) {
413 if (port->wPortChange)
414 status |= (1 << (i + 1));
417 for(i = 0; i < n; i++) {
418 buf[i] = status >> (8 * i);
420 usb_packet_copy(p, buf, n);
423 ret = USB_RET_NAK; /* usb11 11.13.1 */
438 static int usb_hub_broadcast_packet(USBHubState *s, USBPacket *p)
444 for(i = 0; i < NUM_PORTS; i++) {
446 dev = port->port.dev;
447 if (dev && dev->attached && (port->wPortStatus & PORT_STAT_ENABLE)) {
448 ret = usb_handle_packet(dev, p);
449 if (ret != USB_RET_NODEV) {
454 return USB_RET_NODEV;
457 static int usb_hub_handle_packet(USBDevice *dev, USBPacket *p)
459 USBHubState *s = (USBHubState *)dev;
461 #if defined(DEBUG) && 0
462 printf("usb_hub: pid=0x%x\n", pid);
464 if (dev->state == USB_STATE_DEFAULT &&
466 p->devaddr != dev->addr &&
467 (p->pid == USB_TOKEN_SETUP ||
468 p->pid == USB_TOKEN_OUT ||
469 p->pid == USB_TOKEN_IN)) {
470 /* broadcast the packet to the devices */
471 return usb_hub_broadcast_packet(s, p);
473 return usb_generic_handle_packet(dev, p);
476 static void usb_hub_handle_destroy(USBDevice *dev)
478 USBHubState *s = (USBHubState *)dev;
481 for (i = 0; i < NUM_PORTS; i++) {
482 usb_unregister_port(usb_bus_from_device(dev),
487 static USBPortOps usb_hub_port_ops = {
488 .attach = usb_hub_attach,
489 .detach = usb_hub_detach,
490 .child_detach = usb_hub_child_detach,
491 .wakeup = usb_hub_wakeup,
492 .complete = usb_hub_complete,
495 static int usb_hub_initfn(USBDevice *dev)
497 USBHubState *s = DO_UPCAST(USBHubState, dev, dev);
502 for (i = 0; i < NUM_PORTS; i++) {
504 usb_register_port(usb_bus_from_device(dev),
505 &port->port, s, i, &usb_hub_port_ops,
506 USB_SPEED_MASK_LOW | USB_SPEED_MASK_FULL);
507 usb_port_location(&port->port, dev->port, i+1);
509 usb_hub_handle_reset(dev);
513 static const VMStateDescription vmstate_usb_hub_port = {
514 .name = "usb-hub-port",
516 .minimum_version_id = 1,
517 .fields = (VMStateField []) {
518 VMSTATE_UINT16(wPortStatus, USBHubPort),
519 VMSTATE_UINT16(wPortChange, USBHubPort),
520 VMSTATE_END_OF_LIST()
524 static const VMStateDescription vmstate_usb_hub = {
527 .minimum_version_id = 1,
528 .fields = (VMStateField []) {
529 VMSTATE_USB_DEVICE(dev, USBHubState),
530 VMSTATE_STRUCT_ARRAY(ports, USBHubState, NUM_PORTS, 0,
531 vmstate_usb_hub_port, USBHubPort),
532 VMSTATE_END_OF_LIST()
536 static void usb_hub_class_initfn(ObjectClass *klass, void *data)
538 DeviceClass *dc = DEVICE_CLASS(klass);
539 USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
541 uc->init = usb_hub_initfn;
542 uc->product_desc = "QEMU USB Hub";
543 uc->usb_desc = &desc_hub;
544 uc->handle_packet = usb_hub_handle_packet;
545 uc->handle_reset = usb_hub_handle_reset;
546 uc->handle_control = usb_hub_handle_control;
547 uc->handle_data = usb_hub_handle_data;
548 uc->handle_destroy = usb_hub_handle_destroy;
550 dc->vmsd = &vmstate_usb_hub;
553 static TypeInfo hub_info = {
555 .parent = TYPE_USB_DEVICE,
556 .instance_size = sizeof(USBHubState),
557 .class_init = usb_hub_class_initfn,
560 static void usb_hub_register_types(void)
562 type_register_static(&hub_info);
565 type_init(usb_hub_register_types)