auto import from //depot/cupcake/@135843

1 files changed, 896 insertions, 0 deletions

diff --git a/hw/usb-hid.c b/hw/usb-hid.c
new file mode 100644
index 0000000..406c9ab
--- /dev/null
+++ b/hw/usb-hid.c
@@ -0,0 +1,896 @@
+/*
+ * QEMU USB HID devices
+ *
+ * Copyright (c) 2005 Fabrice Bellard
+ * Copyright (c) 2007 OpenMoko, Inc.  (andrew@openedhand.com)
+ *
+ * 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 "hw.h"
+#include "console.h"
+#include "usb.h"
+
+/* HID interface requests */
+#define GET_REPORT   0xa101
+#define GET_IDLE     0xa102
+#define GET_PROTOCOL 0xa103
+#define SET_REPORT   0x2109
+#define SET_IDLE     0x210a
+#define SET_PROTOCOL 0x210b
+
+/* HID descriptor types */
+#define USB_DT_HID    0x21
+#define USB_DT_REPORT 0x22
+#define USB_DT_PHY    0x23
+
+#define USB_MOUSE     1
+#define USB_TABLET    2
+#define USB_KEYBOARD  3
+
+typedef struct USBMouseState {
+    int dx, dy, dz, buttons_state;
+    int x, y;
+    int mouse_grabbed;
+    QEMUPutMouseEntry *eh_entry;
+} USBMouseState;
+
+typedef struct USBKeyboardState {
+    uint16_t modifiers;
+    uint8_t leds;
+    uint8_t key[16];
+    int keys;
+} USBKeyboardState;
+
+typedef struct USBHIDState {
+    USBDevice dev;
+    union {
+        USBMouseState ptr;
+        USBKeyboardState kbd;
+    };
+    int kind;
+    int protocol;
+    int idle;
+    int changed;
+} USBHIDState;
+
+/* mostly the same values as the Bochs USB Mouse device */
+static const uint8_t qemu_mouse_dev_descriptor[] = {
+	0x12,       /*  u8 bLength; */
+	0x01,       /*  u8 bDescriptorType; Device */
+	0x00, 0x01, /*  u16 bcdUSB; v1.0 */
+
+	0x00,	    /*  u8  bDeviceClass; */
+	0x00,	    /*  u8  bDeviceSubClass; */
+	0x00,       /*  u8  bDeviceProtocol; [ low/full speeds only ] */
+	0x08,       /*  u8  bMaxPacketSize0; 8 Bytes */
+
+	0x27, 0x06, /*  u16 idVendor; */
+ 	0x01, 0x00, /*  u16 idProduct; */
+	0x00, 0x00, /*  u16 bcdDevice */
+
+	0x03,       /*  u8  iManufacturer; */
+	0x02,       /*  u8  iProduct; */
+	0x01,       /*  u8  iSerialNumber; */
+	0x01        /*  u8  bNumConfigurations; */
+};
+
+static const uint8_t qemu_mouse_config_descriptor[] = {
+	/* one configuration */
+	0x09,       /*  u8  bLength; */
+	0x02,       /*  u8  bDescriptorType; Configuration */
+	0x22, 0x00, /*  u16 wTotalLength; */
+	0x01,       /*  u8  bNumInterfaces; (1) */
+	0x01,       /*  u8  bConfigurationValue; */
+	0x04,       /*  u8  iConfiguration; */
+	0xa0,       /*  u8  bmAttributes;
+				 Bit 7: must be set,
+				     6: Self-powered,
+				     5: Remote wakeup,
+				     4..0: resvd */
+	50,         /*  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; */
+	0x03,       /*  u8  if_bInterfaceClass; */
+	0x01,       /*  u8  if_bInterfaceSubClass; */
+	0x02,       /*  u8  if_bInterfaceProtocol; [usb1.1 or single tt] */
+	0x07,       /*  u8  if_iInterface; */
+
+        /* HID descriptor */
+        0x09,        /*  u8  bLength; */
+        0x21,        /*  u8 bDescriptorType; */
+        0x01, 0x00,  /*  u16 HID_class */
+        0x00,        /*  u8 country_code */
+        0x01,        /*  u8 num_descriptors */
+        0x22,        /*  u8 type; Report */
+        52, 0,       /*  u16 len */
+
+	/* 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 */
+ 	0x04, 0x00, /*  u16 ep_wMaxPacketSize; */
+	0x0a,       /*  u8  ep_bInterval; (255ms -- usb 2.0 spec) */
+};
+
+static const uint8_t qemu_tablet_config_descriptor[] = {
+	/* one configuration */
+	0x09,       /*  u8  bLength; */
+	0x02,       /*  u8  bDescriptorType; Configuration */
+	0x22, 0x00, /*  u16 wTotalLength; */
+	0x01,       /*  u8  bNumInterfaces; (1) */
+	0x01,       /*  u8  bConfigurationValue; */
+	0x05,       /*  u8  iConfiguration; */
+	0xa0,       /*  u8  bmAttributes;
+				 Bit 7: must be set,
+				     6: Self-powered,
+				     5: Remote wakeup,
+				     4..0: resvd */
+	50,         /*  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; */
+	0x03,       /*  u8  if_bInterfaceClass; */
+	0x01,       /*  u8  if_bInterfaceSubClass; */
+	0x02,       /*  u8  if_bInterfaceProtocol; [usb1.1 or single tt] */
+	0x07,       /*  u8  if_iInterface; */
+
+        /* HID descriptor */
+        0x09,        /*  u8  bLength; */
+        0x21,        /*  u8 bDescriptorType; */
+        0x01, 0x00,  /*  u16 HID_class */
+        0x00,        /*  u8 country_code */
+        0x01,        /*  u8 num_descriptors */
+        0x22,        /*  u8 type; Report */
+        74, 0,       /*  u16 len */
+
+	/* 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 */
+ 	0x08, 0x00, /*  u16 ep_wMaxPacketSize; */
+	0x0a,       /*  u8  ep_bInterval; (255ms -- usb 2.0 spec) */
+};
+
+static const uint8_t qemu_keyboard_config_descriptor[] = {
+    /* one configuration */
+    0x09,		/*  u8  bLength; */
+    USB_DT_CONFIG,	/*  u8  bDescriptorType; Configuration */
+    0x22, 0x00,		/*  u16 wTotalLength; */
+    0x01,		/*  u8  bNumInterfaces; (1) */
+    0x01,		/*  u8  bConfigurationValue; */
+    0x06,		/*  u8  iConfiguration; */
+    0xa0,		/*  u8  bmAttributes;
+				Bit 7: must be set,
+				    6: Self-powered,
+				    5: Remote wakeup,
+				    4..0: resvd */
+    0x32,		/*  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; */
+    USB_DT_INTERFACE,	/*  u8  if_bDescriptorType; Interface */
+    0x00,		/*  u8  if_bInterfaceNumber; */
+    0x00,		/*  u8  if_bAlternateSetting; */
+    0x01,		/*  u8  if_bNumEndpoints; */
+    0x03,		/*  u8  if_bInterfaceClass; HID */
+    0x01,		/*  u8  if_bInterfaceSubClass; Boot */
+    0x01,		/*  u8  if_bInterfaceProtocol; Keyboard */
+    0x07,		/*  u8  if_iInterface; */
+
+    /* HID descriptor */
+    0x09,		/*  u8  bLength; */
+    USB_DT_HID,		/*  u8  bDescriptorType; */
+    0x11, 0x01,		/*  u16 HID_class */
+    0x00,		/*  u8  country_code */
+    0x01,		/*  u8  num_descriptors */
+    USB_DT_REPORT,	/*  u8  type; Report */
+    0x3f, 0x00,		/*  u16 len */
+
+    /* one endpoint (status change endpoint) */
+    0x07,		/*  u8  ep_bLength; */
+    USB_DT_ENDPOINT,	/*  u8  ep_bDescriptorType; Endpoint */
+    USB_DIR_IN | 0x01,	/*  u8  ep_bEndpointAddress; IN Endpoint 1 */
+    0x03,		/*  u8  ep_bmAttributes; Interrupt */
+    0x08, 0x00,		/*  u16 ep_wMaxPacketSize; */
+    0x0a,		/*  u8  ep_bInterval; (255ms -- usb 2.0 spec) */
+};
+
+static const uint8_t qemu_mouse_hid_report_descriptor[] = {
+    0x05, 0x01,		/* Usage Page (Generic Desktop) */
+    0x09, 0x02,		/* Usage (Mouse) */
+    0xa1, 0x01,		/* Collection (Application) */
+    0x09, 0x01,		/*   Usage (Pointer) */
+    0xa1, 0x00,		/*   Collection (Physical) */
+    0x05, 0x09,		/*     Usage Page (Button) */
+    0x19, 0x01,		/*     Usage Minimum (1) */
+    0x29, 0x03,		/*     Usage Maximum (3) */
+    0x15, 0x00,		/*     Logical Minimum (0) */
+    0x25, 0x01,		/*     Logical Maximum (1) */
+    0x95, 0x03,		/*     Report Count (3) */
+    0x75, 0x01,		/*     Report Size (1) */
+    0x81, 0x02,		/*     Input (Data, Variable, Absolute) */
+    0x95, 0x01,		/*     Report Count (1) */
+    0x75, 0x05,		/*     Report Size (5) */
+    0x81, 0x01,		/*     Input (Constant) */
+    0x05, 0x01,		/*     Usage Page (Generic Desktop) */
+    0x09, 0x30,		/*     Usage (X) */
+    0x09, 0x31,		/*     Usage (Y) */
+    0x09, 0x38,		/*     Usage (Wheel) */
+    0x15, 0x81,		/*     Logical Minimum (-0x7f) */
+    0x25, 0x7f,		/*     Logical Maximum (0x7f) */
+    0x75, 0x08,		/*     Report Size (8) */
+    0x95, 0x03,		/*     Report Count (3) */
+    0x81, 0x06,		/*     Input (Data, Variable, Relative) */
+    0xc0,		/*   End Collection */
+    0xc0,		/* End Collection */
+};
+
+static const uint8_t qemu_tablet_hid_report_descriptor[] = {
+    0x05, 0x01,		/* Usage Page (Generic Desktop) */
+    0x09, 0x01,		/* Usage (Pointer) */
+    0xa1, 0x01,		/* Collection (Application) */
+    0x09, 0x01,		/*   Usage (Pointer) */
+    0xa1, 0x00,		/*   Collection (Physical) */
+    0x05, 0x09,		/*     Usage Page (Button) */
+    0x19, 0x01,		/*     Usage Minimum (1) */
+    0x29, 0x03,		/*     Usage Maximum (3) */
+    0x15, 0x00,		/*     Logical Minimum (0) */
+    0x25, 0x01,		/*     Logical Maximum (1) */
+    0x95, 0x03,		/*     Report Count (3) */
+    0x75, 0x01,		/*     Report Size (1) */
+    0x81, 0x02,		/*     Input (Data, Variable, Absolute) */
+    0x95, 0x01,		/*     Report Count (1) */
+    0x75, 0x05,		/*     Report Size (5) */
+    0x81, 0x01,		/*     Input (Constant) */
+    0x05, 0x01,		/*     Usage Page (Generic Desktop) */
+    0x09, 0x30,		/*     Usage (X) */
+    0x09, 0x31,		/*     Usage (Y) */
+    0x15, 0x00,		/*     Logical Minimum (0) */
+    0x26, 0xff, 0x7f,	/*     Logical Maximum (0x7fff) */
+    0x35, 0x00,		/*     Physical Minimum (0) */
+    0x46, 0xff, 0x7f,	/*     Physical Maximum (0x7fff) */
+    0x75, 0x10,		/*     Report Size (16) */
+    0x95, 0x02,		/*     Report Count (2) */
+    0x81, 0x02,		/*     Input (Data, Variable, Absolute) */
+    0x05, 0x01,		/*     Usage Page (Generic Desktop) */
+    0x09, 0x38,		/*     Usage (Wheel) */
+    0x15, 0x81,		/*     Logical Minimum (-0x7f) */
+    0x25, 0x7f,		/*     Logical Maximum (0x7f) */
+    0x35, 0x00,		/*     Physical Minimum (same as logical) */
+    0x45, 0x00,		/*     Physical Maximum (same as logical) */
+    0x75, 0x08,		/*     Report Size (8) */
+    0x95, 0x01,		/*     Report Count (1) */
+    0x81, 0x06,		/*     Input (Data, Variable, Relative) */
+    0xc0,		/*   End Collection */
+    0xc0,		/* End Collection */
+};
+
+static const uint8_t qemu_keyboard_hid_report_descriptor[] = {
+    0x05, 0x01,		/* Usage Page (Generic Desktop) */
+    0x09, 0x06,		/* Usage (Keyboard) */
+    0xa1, 0x01,		/* Collection (Application) */
+    0x75, 0x01,		/*   Report Size (1) */
+    0x95, 0x08,		/*   Report Count (8) */
+    0x05, 0x07,		/*   Usage Page (Key Codes) */
+    0x19, 0xe0,		/*   Usage Minimum (224) */
+    0x29, 0xe7,		/*   Usage Maximum (231) */
+    0x15, 0x00,		/*   Logical Minimum (0) */
+    0x25, 0x01,		/*   Logical Maximum (1) */
+    0x81, 0x02,		/*   Input (Data, Variable, Absolute) */
+    0x95, 0x01,		/*   Report Count (1) */
+    0x75, 0x08,		/*   Report Size (8) */
+    0x81, 0x01,		/*   Input (Constant) */
+    0x95, 0x05,		/*   Report Count (5) */
+    0x75, 0x01,		/*   Report Size (1) */
+    0x05, 0x08,		/*   Usage Page (LEDs) */
+    0x19, 0x01,		/*   Usage Minimum (1) */
+    0x29, 0x05,		/*   Usage Maximum (5) */
+    0x91, 0x02,		/*   Output (Data, Variable, Absolute) */
+    0x95, 0x01,		/*   Report Count (1) */
+    0x75, 0x03,		/*   Report Size (3) */
+    0x91, 0x01,		/*   Output (Constant) */
+    0x95, 0x06,		/*   Report Count (6) */
+    0x75, 0x08,		/*   Report Size (8) */
+    0x15, 0x00,		/*   Logical Minimum (0) */
+    0x25, 0xff,		/*   Logical Maximum (255) */
+    0x05, 0x07,		/*   Usage Page (Key Codes) */
+    0x19, 0x00,		/*   Usage Minimum (0) */
+    0x29, 0xff,		/*   Usage Maximum (255) */
+    0x81, 0x00,		/*   Input (Data, Array) */
+    0xc0,		/* End Collection */
+};
+
+#define USB_HID_USAGE_ERROR_ROLLOVER	0x01
+#define USB_HID_USAGE_POSTFAIL		0x02
+#define USB_HID_USAGE_ERROR_UNDEFINED	0x03
+
+/* Indices are QEMU keycodes, values are from HID Usage Table.  Indices
+ * above 0x80 are for keys that come after 0xe0 or 0xe1+0x1d or 0xe1+0x9d.  */
+static const uint8_t usb_hid_usage_keys[0x100] = {
+    0x00, 0x29, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23,
+    0x24, 0x25, 0x26, 0x27, 0x2d, 0x2e, 0x2a, 0x2b,
+    0x14, 0x1a, 0x08, 0x15, 0x17, 0x1c, 0x18, 0x0c,
+    0x12, 0x13, 0x2f, 0x30, 0x28, 0xe0, 0x04, 0x16,
+    0x07, 0x09, 0x0a, 0x0b, 0x0d, 0x0e, 0x0f, 0x33,
+    0x34, 0x35, 0xe1, 0x31, 0x1d, 0x1b, 0x06, 0x19,
+    0x05, 0x11, 0x10, 0x36, 0x37, 0x38, 0xe5, 0x55,
+    0xe2, 0x2c, 0x32, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e,
+    0x3f, 0x40, 0x41, 0x42, 0x43, 0x53, 0x47, 0x5f,
+    0x60, 0x61, 0x56, 0x5c, 0x5d, 0x5e, 0x57, 0x59,
+    0x5a, 0x5b, 0x62, 0x63, 0x00, 0x00, 0x00, 0x44,
+    0x45, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e,
+    0xe8, 0xe9, 0x71, 0x72, 0x73, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x85, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0xe3, 0xe7, 0x65,
+
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x58, 0xe4, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x54, 0x00, 0x46,
+    0xe6, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x48, 0x00, 0x4a,
+    0x52, 0x4b, 0x00, 0x50, 0x00, 0x4f, 0x00, 0x4d,
+    0x51, 0x4e, 0x49, 0x4c, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+};
+
+static void usb_mouse_event(void *opaque,
+                            int dx1, int dy1, int dz1, int buttons_state)
+{
+    USBHIDState *hs = opaque;
+    USBMouseState *s = &hs->ptr;
+
+    s->dx += dx1;
+    s->dy += dy1;
+    s->dz += dz1;
+    s->buttons_state = buttons_state;
+    hs->changed = 1;
+}
+
+static void usb_tablet_event(void *opaque,
+			     int x, int y, int dz, int buttons_state)
+{
+    USBHIDState *hs = opaque;
+    USBMouseState *s = &hs->ptr;
+
+    s->x = x;
+    s->y = y;
+    s->dz += dz;
+    s->buttons_state = buttons_state;
+    hs->changed = 1;
+}
+
+static void usb_keyboard_event(void *opaque, int keycode)
+{
+    USBHIDState *hs = opaque;
+    USBKeyboardState *s = &hs->kbd;
+    uint8_t hid_code, key;
+    int i;
+
+    key = keycode & 0x7f;
+    hid_code = usb_hid_usage_keys[key | ((s->modifiers >> 1) & (1 << 7))];
+    s->modifiers &= ~(1 << 8);
+
+    hs->changed = 1;
+
+    switch (hid_code) {
+    case 0x00:
+        return;
+
+    case 0xe0:
+        if (s->modifiers & (1 << 9)) {
+            s->modifiers ^= 3 << 8;
+            return;
+        }
+    case 0xe1 ... 0xe7:
+        if (keycode & (1 << 7)) {
+            s->modifiers &= ~(1 << (hid_code & 0x0f));
+            return;
+        }
+    case 0xe8 ... 0xef:
+        s->modifiers |= 1 << (hid_code & 0x0f);
+        return;
+    }
+
+    if (keycode & (1 << 7)) {
+        for (i = s->keys - 1; i >= 0; i --)
+            if (s->key[i] == hid_code) {
+                s->key[i] = s->key[-- s->keys];
+                s->key[s->keys] = 0x00;
+                return;
+            }
+    } else {
+        for (i = s->keys - 1; i >= 0; i --)
+            if (s->key[i] == hid_code)
+                return;
+        if (s->keys < sizeof(s->key))
+            s->key[s->keys ++] = hid_code;
+    }
+}
+
+static inline int int_clamp(int val, int vmin, int vmax)
+{
+    if (val < vmin)
+        return vmin;
+    else if (val > vmax)
+        return vmax;
+    else
+        return val;
+}
+
+static int usb_mouse_poll(USBHIDState *hs, uint8_t *buf, int len)
+{
+    int dx, dy, dz, b, l;
+    USBMouseState *s = &hs->ptr;
+
+    if (!s->mouse_grabbed) {
+	s->eh_entry = qemu_add_mouse_event_handler(usb_mouse_event, hs,
+                                                  0, "QEMU USB Mouse");
+	s->mouse_grabbed = 1;
+    }
+
+    dx = int_clamp(s->dx, -127, 127);
+    dy = int_clamp(s->dy, -127, 127);
+    dz = int_clamp(s->dz, -127, 127);
+
+    s->dx -= dx;
+    s->dy -= dy;
+    s->dz -= dz;
+
+    /* Appears we have to invert the wheel direction */
+    dz = 0 - dz;
+
+    b = 0;
+    if (s->buttons_state & MOUSE_EVENT_LBUTTON)
+        b |= 0x01;
+    if (s->buttons_state & MOUSE_EVENT_RBUTTON)
+        b |= 0x02;
+    if (s->buttons_state & MOUSE_EVENT_MBUTTON)
+        b |= 0x04;
+
+    l = 0;
+    if (len > l)
+        buf[l ++] = b;
+    if (len > l)
+        buf[l ++] = dx;
+    if (len > l)
+        buf[l ++] = dy;
+    if (len > l)
+        buf[l ++] = dz;
+    return l;
+}
+
+static int usb_tablet_poll(USBHIDState *hs, uint8_t *buf, int len)
+{
+    int dz, b, l;
+    USBMouseState *s = &hs->ptr;
+
+    if (!s->mouse_grabbed) {
+	s->eh_entry = qemu_add_mouse_event_handler(usb_tablet_event, hs,
+                                                  1, "QEMU USB Tablet");
+	s->mouse_grabbed = 1;
+    }
+
+    dz = int_clamp(s->dz, -127, 127);
+    s->dz -= dz;
+
+    /* Appears we have to invert the wheel direction */
+    dz = 0 - dz;
+    b = 0;
+    if (s->buttons_state & MOUSE_EVENT_LBUTTON)
+        b |= 0x01;
+    if (s->buttons_state & MOUSE_EVENT_RBUTTON)
+        b |= 0x02;
+    if (s->buttons_state & MOUSE_EVENT_MBUTTON)
+        b |= 0x04;
+
+    buf[0] = b;
+    buf[1] = s->x & 0xff;
+    buf[2] = s->x >> 8;
+    buf[3] = s->y & 0xff;
+    buf[4] = s->y >> 8;
+    buf[5] = dz;
+    l = 6;
+
+    return l;
+}
+
+static int usb_keyboard_poll(USBKeyboardState *s, uint8_t *buf, int len)
+{
+    if (len < 2)
+        return 0;
+
+    buf[0] = s->modifiers & 0xff;
+    buf[1] = 0;
+    if (s->keys > 6)
+        memset(buf + 2, USB_HID_USAGE_ERROR_ROLLOVER, MIN(8, len) - 2);
+    else
+        memcpy(buf + 2, s->key, MIN(8, len) - 2);
+
+    return MIN(8, len);
+}
+
+static int usb_keyboard_write(USBKeyboardState *s, uint8_t *buf, int len)
+{
+    if (len > 0) {
+        /* 0x01: Num Lock LED
+         * 0x02: Caps Lock LED
+         * 0x04: Scroll Lock LED
+         * 0x08: Compose LED
+         * 0x10: Kana LED */
+        s->leds = buf[0];
+    }
+    return 0;
+}
+
+static void usb_mouse_handle_reset(USBDevice *dev)
+{
+    USBHIDState *s = (USBHIDState *)dev;
+
+    s->ptr.dx = 0;
+    s->ptr.dy = 0;
+    s->ptr.dz = 0;
+    s->ptr.x = 0;
+    s->ptr.y = 0;
+    s->ptr.buttons_state = 0;
+    s->protocol = 1;
+}
+
+static void usb_keyboard_handle_reset(USBDevice *dev)
+{
+    USBHIDState *s = (USBHIDState *)dev;
+
+    qemu_add_kbd_event_handler(usb_keyboard_event, s);
+    s->protocol = 1;
+}
+
+static int usb_hid_handle_control(USBDevice *dev, int request, int value,
+                                  int index, int length, uint8_t *data)
+{
+    USBHIDState *s = (USBHIDState *)dev;
+    int ret = 0;
+
+    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_mouse_dev_descriptor,
+                   sizeof(qemu_mouse_dev_descriptor));
+            ret = sizeof(qemu_mouse_dev_descriptor);
+            break;
+        case USB_DT_CONFIG:
+	    if (s->kind == USB_MOUSE) {
+		memcpy(data, qemu_mouse_config_descriptor,
+		       sizeof(qemu_mouse_config_descriptor));
+		ret = sizeof(qemu_mouse_config_descriptor);
+	    } else if (s->kind == USB_TABLET) {
+		memcpy(data, qemu_tablet_config_descriptor,
+		       sizeof(qemu_tablet_config_descriptor));
+		ret = sizeof(qemu_tablet_config_descriptor);
+            } else if (s->kind == USB_KEYBOARD) {
+                memcpy(data, qemu_keyboard_config_descriptor,
+                       sizeof(qemu_keyboard_config_descriptor));
+                ret = sizeof(qemu_keyboard_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, "1");
+                break;
+            case 2:
+                /* product description */
+                ret = set_usb_string(data, s->dev.devname);
+                break;
+            case 3:
+                /* vendor description */
+                ret = set_usb_string(data, "QEMU " QEMU_VERSION);
+                break;
+            case 4:
+                ret = set_usb_string(data, "HID Mouse");
+                break;
+            case 5:
+                ret = set_usb_string(data, "HID Tablet");
+                break;
+            case 6:
+                ret = set_usb_string(data, "HID Keyboard");
+                break;
+            case 7:
+                ret = set_usb_string(data, "Endpoint1 Interrupt Pipe");
+                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;
+        /* hid specific requests */
+    case InterfaceRequest | USB_REQ_GET_DESCRIPTOR:
+        switch(value >> 8) {
+        case 0x22:
+	    if (s->kind == USB_MOUSE) {
+		memcpy(data, qemu_mouse_hid_report_descriptor,
+		       sizeof(qemu_mouse_hid_report_descriptor));
+		ret = sizeof(qemu_mouse_hid_report_descriptor);
+	    } else if (s->kind == USB_TABLET) {
+		memcpy(data, qemu_tablet_hid_report_descriptor,
+		       sizeof(qemu_tablet_hid_report_descriptor));
+		ret = sizeof(qemu_tablet_hid_report_descriptor);
+            } else if (s->kind == USB_KEYBOARD) {
+                memcpy(data, qemu_keyboard_hid_report_descriptor,
+                       sizeof(qemu_keyboard_hid_report_descriptor));
+                ret = sizeof(qemu_keyboard_hid_report_descriptor);
+            }
+            break;
+        default:
+            goto fail;
+        }
+        break;
+    case GET_REPORT:
+	if (s->kind == USB_MOUSE)
+            ret = usb_mouse_poll(s, data, length);
+	else if (s->kind == USB_TABLET)
+            ret = usb_tablet_poll(s, data, length);
+        else if (s->kind == USB_KEYBOARD)
+            ret = usb_keyboard_poll(&s->kbd, data, length);
+        break;
+    case SET_REPORT:
+        if (s->kind == USB_KEYBOARD)
+            ret = usb_keyboard_write(&s->kbd, data, length);
+        else
+            goto fail;
+        break;
+    case GET_PROTOCOL:
+        if (s->kind != USB_KEYBOARD)
+            goto fail;
+        ret = 1;
+        data[0] = s->protocol;
+        break;
+    case SET_PROTOCOL:
+        if (s->kind != USB_KEYBOARD)
+            goto fail;
+        ret = 0;
+        s->protocol = value;
+        break;
+    case GET_IDLE:
+        ret = 1;
+        data[0] = s->idle;
+        break;
+    case SET_IDLE:
+        s->idle = value;
+        ret = 0;
+        break;
+    default:
+    fail:
+        ret = USB_RET_STALL;
+        break;
+    }
+    return ret;
+}
+
+static int usb_hid_handle_data(USBDevice *dev, USBPacket *p)
+{
+    USBHIDState *s = (USBHIDState *)dev;
+    int ret = 0;
+
+    switch(p->pid) {
+    case USB_TOKEN_IN:
+        if (p->devep == 1) {
+            /* TODO: Implement finite idle delays.  */
+            if (!(s->changed || s->idle))
+                return USB_RET_NAK;
+            s->changed = 0;
+            if (s->kind == USB_MOUSE)
+                ret = usb_mouse_poll(s, p->data, p->len);
+            else if (s->kind == USB_TABLET)
+                ret = usb_tablet_poll(s, p->data, p->len);
+            else if (s->kind == USB_KEYBOARD)
+                ret = usb_keyboard_poll(&s->kbd, p->data, p->len);
+        } else {
+            goto fail;
+        }
+        break;
+    case USB_TOKEN_OUT:
+    default:
+    fail:
+        ret = USB_RET_STALL;
+        break;
+    }
+    return ret;
+}
+
+static void usb_hid_handle_destroy(USBDevice *dev)
+{
+    USBHIDState *s = (USBHIDState *)dev;
+
+    if (s->kind != USB_KEYBOARD)
+        qemu_remove_mouse_event_handler(s->ptr.eh_entry);
+    /* TODO: else */
+    qemu_free(s);
+}
+
+USBDevice *usb_tablet_init(void)
+{
+    USBHIDState *s;
+
+    s = qemu_mallocz(sizeof(USBHIDState));
+    if (!s)
+        return NULL;
+    s->dev.speed = USB_SPEED_FULL;
+    s->dev.handle_packet = usb_generic_handle_packet;
+
+    s->dev.handle_reset = usb_mouse_handle_reset;
+    s->dev.handle_control = usb_hid_handle_control;
+    s->dev.handle_data = usb_hid_handle_data;
+    s->dev.handle_destroy = usb_hid_handle_destroy;
+    s->kind = USB_TABLET;
+    /* Force poll routine to be run and grab input the first time.  */
+    s->changed = 1;
+
+    pstrcpy(s->dev.devname, sizeof(s->dev.devname), "QEMU USB Tablet");
+
+    return (USBDevice *)s;
+}
+
+USBDevice *usb_mouse_init(void)
+{
+    USBHIDState *s;
+
+    s = qemu_mallocz(sizeof(USBHIDState));
+    if (!s)
+        return NULL;
+    s->dev.speed = USB_SPEED_FULL;
+    s->dev.handle_packet = usb_generic_handle_packet;
+
+    s->dev.handle_reset = usb_mouse_handle_reset;
+    s->dev.handle_control = usb_hid_handle_control;
+    s->dev.handle_data = usb_hid_handle_data;
+    s->dev.handle_destroy = usb_hid_handle_destroy;
+    s->kind = USB_MOUSE;
+    /* Force poll routine to be run and grab input the first time.  */
+    s->changed = 1;
+
+    pstrcpy(s->dev.devname, sizeof(s->dev.devname), "QEMU USB Mouse");
+
+    return (USBDevice *)s;
+}
+
+USBDevice *usb_keyboard_init(void)
+{
+    USBHIDState *s;
+
+    s = qemu_mallocz(sizeof(USBHIDState));
+    if (!s)
+        return NULL;
+    s->dev.speed = USB_SPEED_FULL;
+    s->dev.handle_packet = usb_generic_handle_packet;
+
+    s->dev.handle_reset = usb_keyboard_handle_reset;
+    s->dev.handle_control = usb_hid_handle_control;
+    s->dev.handle_data = usb_hid_handle_data;
+    s->dev.handle_destroy = usb_hid_handle_destroy;
+    s->kind = USB_KEYBOARD;
+
+    pstrcpy(s->dev.devname, sizeof(s->dev.devname), "QEMU USB Keyboard");
+
+    return (USBDevice *) s;
+}