initial USB support

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1597 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 694 insertions, 0 deletions

diff --git a/hw/usb.c b/hw/usb.c
new file mode 100644
index 0000000000..cfbdb15d11
--- /dev/null
+++ b/hw/usb.c
@@ -0,0 +1,694 @@
+/*
+ * QEMU USB emulation
+ *
+ * Copyright (c) 2005 Fabrice Bellard
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "vl.h"
+
+void usb_attach(USBPort *port, USBDevice *dev)
+{
+    port->attach(port, dev);
+}
+
+/**********************/
+/* generic USB device helpers (you are not forced to use them when
+   writing your USB device driver, but they help handling the
+   protocol) 
+*/
+
+#define SETUP_STATE_IDLE 0
+#define SETUP_STATE_DATA 1
+#define SETUP_STATE_ACK  2
+
+int usb_generic_handle_packet(USBDevice *s, int pid, 
+                              uint8_t devaddr, uint8_t devep,
+                              uint8_t *data, int len)
+{
+    int l, ret = 0;
+
+    switch(pid) {
+    case USB_MSG_ATTACH:
+        s->state = USB_STATE_ATTACHED;
+        break;
+    case USB_MSG_DETACH:
+        s->state = USB_STATE_NOTATTACHED;
+        break;
+    case USB_MSG_RESET:
+        s->remote_wakeup = 0;
+        s->addr = 0;
+        s->state = USB_STATE_DEFAULT;
+        s->handle_reset(s);
+        break;
+    case USB_TOKEN_SETUP:
+        if (s->state < USB_STATE_DEFAULT || devaddr != s->addr)
+            return USB_RET_NODEV;
+        if (len != 8)
+            goto fail;
+        memcpy(s->setup_buf, data, 8);
+        s->setup_len = (s->setup_buf[7] << 8) | s->setup_buf[6];
+        s->setup_index = 0;
+        if (s->setup_buf[0] & USB_DIR_IN) {
+            ret = s->handle_control(s, 
+                                    (s->setup_buf[0] << 8) | s->setup_buf[1],
+                                    (s->setup_buf[3] << 8) | s->setup_buf[2],
+                                    (s->setup_buf[5] << 8) | s->setup_buf[4],
+                                    s->setup_len,
+                                    s->data_buf);
+            if (ret < 0)
+                return ret;
+            if (ret < s->setup_len)
+                s->setup_len = ret;
+            s->setup_state = SETUP_STATE_DATA;
+        } else {
+            if (s->setup_len == 0)
+                s->setup_state = SETUP_STATE_ACK;
+            else
+                s->setup_state = SETUP_STATE_DATA;
+        }
+        break;
+    case USB_TOKEN_IN:
+        if (s->state < USB_STATE_DEFAULT || devaddr != s->addr)
+            return USB_RET_NODEV;
+        switch(devep) {
+        case 0:
+            switch(s->setup_state) {
+            case SETUP_STATE_ACK:
+                s->setup_state = SETUP_STATE_IDLE;
+                if (!(s->setup_buf[0] & USB_DIR_IN)) {
+                    ret = s->handle_control(s, 
+                                      (s->setup_buf[0] << 8) | s->setup_buf[1],
+                                      (s->setup_buf[3] << 8) | s->setup_buf[2],
+                                      (s->setup_buf[5] << 8) | s->setup_buf[4],
+                                      s->setup_len,
+                                      s->data_buf);
+                    if (ret > 0)
+                        ret = 0;
+                } else {
+                    goto fail;
+                }
+                break;
+            case SETUP_STATE_DATA:
+                if (s->setup_buf[0] & USB_DIR_IN) {
+                    l = s->setup_len - s->setup_index;
+                    if (l > len)
+                        l = len;
+                    memcpy(data, s->data_buf + s->setup_index, l);
+                    s->setup_index += l;
+                    if (s->setup_index >= s->setup_len)
+                        s->setup_state = SETUP_STATE_ACK;
+                    ret = l;
+                } else {
+                    s->setup_state = SETUP_STATE_IDLE;
+                    goto fail;
+                }
+                break;
+            default:
+                goto fail;
+            }
+            break;
+        default:
+            ret = s->handle_data(s, pid, devep, data, len);
+            break;
+        }
+        break;
+    case USB_TOKEN_OUT:
+        if (s->state < USB_STATE_DEFAULT || devaddr != s->addr)
+            return USB_RET_NODEV;
+        switch(devep) {
+        case 0:
+            switch(s->setup_state) {
+            case SETUP_STATE_ACK:
+                s->setup_state = SETUP_STATE_IDLE;
+                if (s->setup_buf[0] & USB_DIR_IN) {
+                    /* transfer OK */
+                } else {
+                    goto fail;
+                }
+                break;
+            case SETUP_STATE_DATA:
+                if (!(s->setup_buf[0] & USB_DIR_IN)) {
+                    l = s->setup_len - s->setup_index;
+                    if (l > len)
+                        l = len;
+                    memcpy(s->data_buf + s->setup_index, data, l);
+                    s->setup_index += l;
+                    if (s->setup_index >= s->setup_len)
+                        s->setup_state = SETUP_STATE_ACK;
+                    ret = l;
+                } else {
+                    s->setup_state = SETUP_STATE_IDLE;
+                    goto fail;
+                }
+                break;
+            default:
+                goto fail;
+            }
+            break;
+        default:
+            ret = s->handle_data(s, pid, devep, data, len);
+            break;
+        }
+        break;
+    default:
+    fail:
+        ret = USB_RET_STALL;
+        break;
+    }
+    return ret;
+}
+
+/* XXX: fix overflow */
+int set_usb_string(uint8_t *buf, const char *str)
+{
+    int len, i;
+    uint8_t *q;
+
+    q = buf;
+    len = strlen(str);
+    *q++ = 2 * len + 1;
+    *q++ = 3;
+    for(i = 0; i < len; i++) {
+        *q++ = str[i];
+        *q++ = 0;
+    }
+    return q - buf;
+}
+
+/**********************/
+/* USB hub emulation */
+
+//#define DEBUG
+
+#define MAX_PORTS 8
+
+#define DS_IDLE        0
+#define DS_CONTROL_IN  1
+#define DS_CONTROL_OUT 2
+
+typedef struct USBHubPort {
+    USBPort port;
+    USBDevice *dev;
+    uint16_t wPortStatus;
+    uint16_t wPortChange;
+} USBHubPort;
+
+typedef struct USBHubState {
+    USBDevice dev;
+    int nb_ports;
+    USBHubPort ports[MAX_PORTS];
+} USBHubState;
+
+#define ClearHubFeature		(0x2000 | USB_REQ_CLEAR_FEATURE)
+#define ClearPortFeature	(0x2300 | USB_REQ_CLEAR_FEATURE)
+#define GetHubDescriptor	(0xa000 | USB_REQ_GET_DESCRIPTOR)
+#define GetHubStatus		(0xa000 | USB_REQ_GET_STATUS)
+#define GetPortStatus		(0xa300 | USB_REQ_GET_STATUS)
+#define SetHubFeature		(0x2000 | USB_REQ_SET_FEATURE)
+#define SetPortFeature		(0x2300 | USB_REQ_SET_FEATURE)
+
+#define PORT_STAT_CONNECTION	0x0001
+#define PORT_STAT_ENABLE	0x0002
+#define PORT_STAT_SUSPEND	0x0004
+#define PORT_STAT_OVERCURRENT	0x0008
+#define PORT_STAT_RESET		0x0010
+#define PORT_STAT_POWER		0x0100
+#define PORT_STAT_LOW_SPEED	0x0200
+#define PORT_STAT_HIGH_SPEED    0x0400
+#define PORT_STAT_TEST          0x0800
+#define PORT_STAT_INDICATOR     0x1000
+
+#define PORT_STAT_C_CONNECTION	0x0001
+#define PORT_STAT_C_ENABLE	0x0002
+#define PORT_STAT_C_SUSPEND	0x0004
+#define PORT_STAT_C_OVERCURRENT	0x0008
+#define PORT_STAT_C_RESET	0x0010
+
+#define PORT_CONNECTION	        0
+#define PORT_ENABLE		1
+#define PORT_SUSPEND		2
+#define PORT_OVERCURRENT	3
+#define PORT_RESET		4
+#define PORT_POWER		8
+#define PORT_LOWSPEED		9
+#define PORT_HIGHSPEED		10
+#define PORT_C_CONNECTION	16
+#define PORT_C_ENABLE		17
+#define PORT_C_SUSPEND		18
+#define PORT_C_OVERCURRENT	19
+#define PORT_C_RESET		20
+#define PORT_TEST               21
+#define PORT_INDICATOR          22
+
+/* same as Linux kernel root hubs */
+
+static const uint8_t qemu_hub_dev_descriptor[] = {
+	0x12,       /*  __u8 bLength; */
+	0x01,       /*  __u8 bDescriptorType; Device */
+	0x10, 0x01, /*  __u16 bcdUSB; v1.1 */
+
+	0x09,	    /*  __u8  bDeviceClass; HUB_CLASSCODE */
+	0x00,	    /*  __u8  bDeviceSubClass; */
+	0x00,       /*  __u8  bDeviceProtocol; [ low/full speeds only ] */
+	0x08,       /*  __u8  bMaxPacketSize0; 8 Bytes */
+
+	0x00, 0x00, /*  __u16 idVendor; */
+ 	0x00, 0x00, /*  __u16 idProduct; */
+	0x01, 0x01, /*  __u16 bcdDevice */
+
+	0x03,       /*  __u8  iManufacturer; */
+	0x02,       /*  __u8  iProduct; */
+	0x01,       /*  __u8  iSerialNumber; */
+	0x01        /*  __u8  bNumConfigurations; */
+};
+
+/* XXX: patch interrupt size */
+static const uint8_t qemu_hub_config_descriptor[] = {
+
+	/* one configuration */
+	0x09,       /*  __u8  bLength; */
+	0x02,       /*  __u8  bDescriptorType; Configuration */
+	0x19, 0x00, /*  __u16 wTotalLength; */
+	0x01,       /*  __u8  bNumInterfaces; (1) */
+	0x01,       /*  __u8  bConfigurationValue; */
+	0x00,       /*  __u8  iConfiguration; */
+	0xc0,       /*  __u8  bmAttributes; 
+				 Bit 7: must be set,
+				     6: Self-powered,
+				     5: Remote wakeup,
+				     4..0: resvd */
+	0x00,       /*  __u8  MaxPower; */
+      
+	/* USB 1.1:
+	 * USB 2.0, single TT organization (mandatory):
+	 *	one interface, protocol 0
+	 *
+	 * USB 2.0, multiple TT organization (optional):
+	 *	two interfaces, protocols 1 (like single TT)
+	 *	and 2 (multiple TT mode) ... config is
+	 *	sometimes settable
+	 *	NOT IMPLEMENTED
+	 */
+
+	/* one interface */
+	0x09,       /*  __u8  if_bLength; */
+	0x04,       /*  __u8  if_bDescriptorType; Interface */
+	0x00,       /*  __u8  if_bInterfaceNumber; */
+	0x00,       /*  __u8  if_bAlternateSetting; */
+	0x01,       /*  __u8  if_bNumEndpoints; */
+	0x09,       /*  __u8  if_bInterfaceClass; HUB_CLASSCODE */
+	0x00,       /*  __u8  if_bInterfaceSubClass; */
+	0x00,       /*  __u8  if_bInterfaceProtocol; [usb1.1 or single tt] */
+	0x00,       /*  __u8  if_iInterface; */
+     
+	/* one endpoint (status change endpoint) */
+	0x07,       /*  __u8  ep_bLength; */
+	0x05,       /*  __u8  ep_bDescriptorType; Endpoint */
+	0x81,       /*  __u8  ep_bEndpointAddress; IN Endpoint 1 */
+ 	0x03,       /*  __u8  ep_bmAttributes; Interrupt */
+ 	0x02, 0x00, /*  __u16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) */
+	0xff        /*  __u8  ep_bInterval; (255ms -- usb 2.0 spec) */
+};
+
+static const uint8_t qemu_hub_hub_descriptor[] =
+{
+	0x09,			/*  __u8  bLength; */
+	0x29,			/*  __u8  bDescriptorType; Hub-descriptor */
+	0x00,			/*  __u8  bNbrPorts; (patched later) */
+	0x0a,			/* __u16  wHubCharacteristics; */
+	0x00,			/*   (per-port OC, no power switching) */
+	0x01,			/*  __u8  bPwrOn2pwrGood; 2ms */
+	0x00,			/*  __u8  bHubContrCurrent; 0 mA */
+	0x00,			/*  __u8  DeviceRemovable; *** 7 Ports max *** */
+	0xff			/*  __u8  PortPwrCtrlMask; *** 7 ports max *** */
+};
+
+static void usb_hub_attach(USBPort *port1, USBDevice *dev)
+{
+    USBHubState *s = port1->opaque;
+    USBHubPort *port = &s->ports[port1->index];
+    
+    if (dev) {
+        if (port->dev)
+            usb_attach(port1, NULL);
+        
+        port->wPortStatus |= PORT_STAT_CONNECTION;
+        port->wPortChange |= PORT_STAT_C_CONNECTION;
+        if (dev->speed == USB_SPEED_LOW)
+            port->wPortStatus |= PORT_STAT_LOW_SPEED;
+        else
+            port->wPortStatus &= ~PORT_STAT_LOW_SPEED;
+        port->dev = dev;
+    } else {
+        dev = port->dev;
+        if (dev) {
+            port->wPortStatus &= ~PORT_STAT_CONNECTION;
+            port->wPortChange |= PORT_STAT_C_CONNECTION;
+            if (port->wPortStatus & PORT_STAT_ENABLE) {
+                port->wPortStatus &= ~PORT_STAT_ENABLE;
+                port->wPortChange |= PORT_STAT_C_ENABLE;
+            }
+            port->dev = NULL;
+        }
+    }
+}
+
+static void usb_hub_handle_reset(USBDevice *dev)
+{
+    /* XXX: do it */
+}
+
+static int usb_hub_handle_control(USBDevice *dev, int request, int value,
+                                  int index, int length, uint8_t *data)
+{
+    USBHubState *s = (USBHubState *)dev;
+    int ret;
+
+    switch(request) {
+    case DeviceRequest | USB_REQ_GET_STATUS:
+        data[0] = (1 << USB_DEVICE_SELF_POWERED) |
+            (dev->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP);
+        data[1] = 0x00;
+        ret = 2;
+        break;
+    case DeviceOutRequest | USB_REQ_CLEAR_FEATURE:
+        if (value == USB_DEVICE_REMOTE_WAKEUP) {
+            dev->remote_wakeup = 0;
+        } else {
+            goto fail;
+        }
+        ret = 0;
+        break;
+    case DeviceOutRequest | USB_REQ_SET_FEATURE:
+        if (value == USB_DEVICE_REMOTE_WAKEUP) {
+            dev->remote_wakeup = 1;
+        } else {
+            goto fail;
+        }
+        ret = 0;
+        break;
+    case DeviceOutRequest | USB_REQ_SET_ADDRESS:
+        dev->addr = value;
+        ret = 0;
+        break;
+    case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
+        switch(value >> 8) {
+        case USB_DT_DEVICE:
+            memcpy(data, qemu_hub_dev_descriptor, 
+                   sizeof(qemu_hub_dev_descriptor));
+            ret = sizeof(qemu_hub_dev_descriptor);
+            break;
+        case USB_DT_CONFIG:
+            memcpy(data, qemu_hub_config_descriptor, 
+                   sizeof(qemu_hub_config_descriptor));
+            ret = sizeof(qemu_hub_config_descriptor);
+            break;
+        case USB_DT_STRING:
+            switch(value & 0xff) {
+            case 0:
+                /* language ids */
+                data[0] = 4;
+                data[1] = 3;
+                data[2] = 0x09;
+                data[3] = 0x04;
+                ret = 4;
+                break;
+            case 1:
+                /* serial number */
+                ret = set_usb_string(data, "314159");
+                break;
+            case 2:
+                /* product description */
+                ret = set_usb_string(data, "QEMU USB Hub");
+                break;
+            case 3:
+                /* vendor description */
+                ret = set_usb_string(data, "QEMU " QEMU_VERSION);
+                break;
+            default:
+                goto fail;
+            }
+            break;
+        default:
+            goto fail;
+        }
+        break;
+    case DeviceRequest | USB_REQ_GET_CONFIGURATION:
+        data[0] = 1;
+        ret = 1;
+        break;
+    case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
+        ret = 0;
+        break;
+    case DeviceRequest | USB_REQ_GET_INTERFACE:
+        data[0] = 0;
+        ret = 1;
+        break;
+    case DeviceOutRequest | USB_REQ_SET_INTERFACE:
+        ret = 0;
+        break;
+        /* usb specific requests */
+    case GetHubStatus:
+        data[0] = 0;
+        data[1] = 0;
+        data[2] = 0;
+        data[3] = 0;
+        ret = 4;
+        break;
+    case GetPortStatus:
+        {
+            unsigned int n = index - 1;
+            USBHubPort *port;
+            if (n >= s->nb_ports)
+                goto fail;
+            port = &s->ports[n];
+            data[0] = port->wPortStatus;
+            data[1] = port->wPortStatus >> 8;
+            data[2] = port->wPortChange;
+            data[3] = port->wPortChange >> 8;
+            ret = 4;
+        }
+        break;
+    case SetHubFeature:
+    case ClearHubFeature:
+        if (value == 0 || value == 1) {
+        } else {
+            goto fail;
+        }
+        ret = 0;
+        break;
+    case SetPortFeature:
+        {
+            unsigned int n = index - 1;
+            USBHubPort *port;
+            USBDevice *dev;
+            if (n >= s->nb_ports)
+                goto fail;
+            port = &s->ports[n];
+            dev = port->dev;
+            switch(value) {
+            case PORT_SUSPEND:
+                port->wPortStatus |= PORT_STAT_SUSPEND;
+                break;
+            case PORT_RESET:
+                if (dev) {
+                    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->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;
+    }
+    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->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;
+}