Archipelago » qemu

/*

 * QEMU USB HID devices

 * 

 * 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"

/* HID interface requests */

#define GET_REPORT   0xa101

#define GET_IDLE     0xa102

#define GET_PROTOCOL 0xa103

#define SET_IDLE     0x210a

#define SET_PROTOCOL 0x210b

#define USB_MOUSE  1

#define USB_TABLET 2

typedef struct USBMouseState {

    USBDevice dev;

    int dx, dy, dz, buttons_state;

    int x, y;

    int kind;

    int mouse_grabbed;

} USBMouseState;

/* 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 */

        0x10, 0x00, /*  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] */

        0x05,       /*  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 */

        50, 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 */

         0x03, 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; */

        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] */

        0x05,       /*  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; */

        0x03,       /*  u8  ep_bInterval; (255ms -- usb 2.0 spec) */

};

static const uint8_t qemu_mouse_hid_report_descriptor[] = {

    0x05, 0x01, 0x09, 0x02, 0xA1, 0x01, 0x09, 0x01, 

    0xA1, 0x00, 0x05, 0x09, 0x19, 0x01, 0x29, 0x03,

    0x15, 0x00, 0x25, 0x01, 0x95, 0x03, 0x75, 0x01, 

    0x81, 0x02, 0x95, 0x01, 0x75, 0x05, 0x81, 0x01,

    0x05, 0x01, 0x09, 0x30, 0x09, 0x31, 0x15, 0x81, 

    0x25, 0x7F, 0x75, 0x08, 0x95, 0x02, 0x81, 0x06,

    0xC0, 0xC0,

};

static const uint8_t qemu_tablet_hid_report_descriptor[] = {

        0x05, 0x01, /* Usage Page Generic Desktop */

        0x09, 0x01, /* Usage Mouse */

        0xA1, 0x01, /* Collection Application */

        0x09, 0x01, /* Usage Pointer */

        0xA1, 0x00, /* Collection Physical */

        0x05, 0x09, /* Usage Page Button */

        0x19, 0x01, /* Usage Minimum Button 1 */

        0x29, 0x03, /* Usage Maximum Button 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, Var, Abs) */

        0x95, 0x01, /* Report Count 1 */

        0x75, 0x05, /* Report Size 5 */

        0x81, 0x01, /* Input (Cnst, Var, Abs) */

        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, 0xFE, 0x7F, /* Physical Maximum 0x7fff */

        0x75, 0x10, /* Report Size 16 */

        0x95, 0x02, /* Report Count 2 */

        0x81, 0x02, /* Input (Data, Var, Abs) */

        0x05, 0x01, /* Usage Page Generic Desktop */

        0x09, 0x38, /* Usage Wheel */

        0x15, 0x81, /* Logical Minimum -127 */

        0x25, 0x7F, /* Logical Maximum 127 */

        0x35, 0x00, /* Physical Minimum 0 (same as logical) */

        0x45, 0x00, /* Physical Maximum 0 (same as logical) */

        0x75, 0x08, /* Report Size 8 */

        0x95, 0x01, /* Report Count 1 */

        0x81, 0x02, /* Input (Data, Var, Rel) */

        0xC0,       /* End Collection */

        0xC0,       /* End Collection */

};

static void usb_mouse_event(void *opaque,

                            int dx1, int dy1, int dz1, int buttons_state)

{

    USBMouseState *s = opaque;

    s->dx += dx1;

    s->dy += dy1;

    s->dz += dz1;

    s->buttons_state = buttons_state;

}

static void usb_tablet_event(void *opaque,

                             int x, int y, int dz, int buttons_state)

{

    USBMouseState *s = opaque;

    s->x = x;

    s->y = y;

    s->dz += dz;

    s->buttons_state = buttons_state;

}

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(USBMouseState *s, uint8_t *buf, int len)

{

    int dx, dy, dz, b, l;

    if (!s->mouse_grabbed) {

        qemu_add_mouse_event_handler(usb_mouse_event, s, 0);

        s->mouse_grabbed = 1;

    }

    dx = int_clamp(s->dx, -128, 127);

    dy = int_clamp(s->dy, -128, 127);

    dz = int_clamp(s->dz, -128, 127);

    s->dx -= dx;

    s->dy -= dy;

    s->dz -= 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] = dx;

    buf[2] = dy;

    l = 3;

    if (len >= 4) {

        buf[3] = dz;

        l = 4;

    }

    return l;

}

static int usb_tablet_poll(USBMouseState *s, uint8_t *buf, int len)

{

    int dz, b, l;

    if (!s->mouse_grabbed) {

        qemu_add_mouse_event_handler(usb_tablet_event, s, 1);

        s->mouse_grabbed = 1;

    }

    dz = int_clamp(s->dz, -128, 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 void usb_mouse_handle_reset(USBDevice *dev)

{

    USBMouseState *s = (USBMouseState *)dev;

    s->dx = 0;

    s->dy = 0;

    s->dz = 0;

    s->x = 0;

    s->y = 0;

    s->buttons_state = 0;

}

static int usb_mouse_handle_control(USBDevice *dev, int request, int value,

                                  int index, int length, uint8_t *data)

{

    USBMouseState *s = (USBMouseState *)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);

            }                

            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 */

                if (s->kind == USB_MOUSE)

                    ret = set_usb_string(data, "QEMU USB Mouse");

                else if (s->kind == USB_TABLET)

                    ret = set_usb_string(data, "QEMU USB Tablet");

                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, "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);

            }

            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);

        break;

    case SET_IDLE:

        ret = 0;

        break;

    default:

    fail:

        ret = USB_RET_STALL;

        break;

    }

    return ret;

}

static int usb_mouse_handle_data(USBDevice *dev, USBPacket *p)

{

    USBMouseState *s = (USBMouseState *)dev;

    int ret = 0;

    switch(p->pid) {

    case USB_TOKEN_IN:

        if (p->devep == 1) {

            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 {

            goto fail;

        }

        break;

    case USB_TOKEN_OUT:

    default:

    fail:

        ret = USB_RET_STALL;

        break;

    }

    return ret;

}

static void usb_mouse_handle_destroy(USBDevice *dev)

{

    USBMouseState *s = (USBMouseState *)dev;

    qemu_add_mouse_event_handler(NULL, NULL, 0);

    qemu_free(s);

}

USBDevice *usb_tablet_init(void)

{

    USBMouseState *s;

    s = qemu_mallocz(sizeof(USBMouseState));

    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_mouse_handle_control;

    s->dev.handle_data = usb_mouse_handle_data;

    s->dev.handle_destroy = usb_mouse_handle_destroy;

    s->kind = USB_TABLET;

    pstrcpy(s->dev.devname, sizeof(s->dev.devname), "QEMU USB Tablet");

    return (USBDevice *)s;

}

USBDevice *usb_mouse_init(void)

{

    USBMouseState *s;

    s = qemu_mallocz(sizeof(USBMouseState));

    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_mouse_handle_control;

    s->dev.handle_data = usb_mouse_handle_data;

    s->dev.handle_destroy = usb_mouse_handle_destroy;

    s->kind = USB_MOUSE;

    pstrcpy(s->dev.devname, sizeof(s->dev.devname), "QEMU USB Mouse");

    return (USBDevice *)s;

}