Archipelago » qemu

/*

 * Wacom PenPartner USB tablet emulation.

 *

 * Copyright (c) 2006 Openedhand Ltd.

 * Author: Andrzej Zaborowski <balrog@zabor.org>

 *

 * Based on hw/usb-hid.c:

 * 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 "hw.h"

#include "console.h"

#include "usb.h"

#include "usb-desc.h"

/* Interface requests */

#define WACOM_GET_REPORT        0x2101

#define WACOM_SET_REPORT        0x2109

/* HID interface requests */

#define HID_GET_REPORT                0xa101

#define HID_GET_IDLE                0xa102

#define HID_GET_PROTOCOL        0xa103

#define HID_SET_IDLE                0x210a

#define HID_SET_PROTOCOL        0x210b

typedef struct USBWacomState {

    USBDevice dev;

    QEMUPutMouseEntry *eh_entry;

    int dx, dy, dz, buttons_state;

    int x, y;

    int mouse_grabbed;

    enum {

        WACOM_MODE_HID = 1,

        WACOM_MODE_WACOM = 2,

    } mode;

    uint8_t idle;

    int changed;

} USBWacomState;

enum {

    STR_MANUFACTURER = 1,

    STR_PRODUCT,

    STR_SERIALNUMBER,

};

static const USBDescStrings desc_strings = {

    [STR_MANUFACTURER]     = "QEMU " QEMU_VERSION,

    [STR_PRODUCT]          = "Wacom PenPartner",

    [STR_SERIALNUMBER]     = "1",

};

static const USBDescIface desc_iface_wacom = {

    .bInterfaceNumber              = 0,

    .bNumEndpoints                 = 1,

    .bInterfaceClass               = USB_CLASS_HID,

    .bInterfaceSubClass            = 0x01, /* boot */

    .bInterfaceProtocol            = 0x02,

    .ndesc                         = 1,

    .descs = (USBDescOther[]) {

        {

            /* HID descriptor */

            .data = (uint8_t[]) {

                0x09,          /*  u8  bLength */

                0x21,          /*  u8  bDescriptorType */

                0x01, 0x10,    /*  u16 HID_class */

                0x00,          /*  u8  country_code */

                0x01,          /*  u8  num_descriptors */

                0x22,          /*  u8  type: Report */

                0x6e, 0,       /*  u16 len */

            },

        },

    },

    .eps = (USBDescEndpoint[]) {

        {

            .bEndpointAddress      = USB_DIR_IN | 0x01,

            .bmAttributes          = USB_ENDPOINT_XFER_INT,

            .wMaxPacketSize        = 8,

            .bInterval             = 0x0a,

        },

    },

};

static const USBDescDevice desc_device_wacom = {

    .bcdUSB                        = 0x0110,

    .bMaxPacketSize0               = 8,

    .bNumConfigurations            = 1,

    .confs = (USBDescConfig[]) {

        {

            .bNumInterfaces        = 1,

            .bConfigurationValue   = 1,

            .bmAttributes          = 0x80,

            .bMaxPower             = 40,

            .nif = 1,

            .ifs = &desc_iface_wacom,

        },

    },

};

static const USBDesc desc_wacom = {

    .id = {

        .idVendor          = 0x056a,

        .idProduct         = 0x0000,

        .bcdDevice         = 0x4210,

        .iManufacturer     = STR_MANUFACTURER,

        .iProduct          = STR_PRODUCT,

        .iSerialNumber     = STR_SERIALNUMBER,

    },

    .full = &desc_device_wacom,

    .str  = desc_strings,

};

static void usb_mouse_event(void *opaque,

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

{

    USBWacomState *s = opaque;

    s->dx += dx1;

    s->dy += dy1;

    s->dz += dz1;

    s->buttons_state = buttons_state;

    s->changed = 1;

}

static void usb_wacom_event(void *opaque,

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

{

    USBWacomState *s = opaque;

    /* scale to Penpartner resolution */

    s->x = (x * 5040 / 0x7FFF);

    s->y = (y * 3780 / 0x7FFF);

    s->dz += dz;

    s->buttons_state = buttons_state;

    s->changed = 1;

}

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

{

    int dx, dy, dz, b, l;

    if (!s->mouse_grabbed) {

        s->eh_entry = qemu_add_mouse_event_handler(usb_mouse_event, s, 0,

                        "QEMU PenPartner tablet");

        qemu_activate_mouse_event_handler(s->eh_entry);

        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_wacom_poll(USBWacomState *s, uint8_t *buf, int len)

{

    int b;

    if (!s->mouse_grabbed) {

        s->eh_entry = qemu_add_mouse_event_handler(usb_wacom_event, s, 1,

                        "QEMU PenPartner tablet");

        qemu_activate_mouse_event_handler(s->eh_entry);

        s->mouse_grabbed = 1;

    }

    b = 0;

    if (s->buttons_state & MOUSE_EVENT_LBUTTON)

        b |= 0x01;

    if (s->buttons_state & MOUSE_EVENT_RBUTTON)

        b |= 0x40;

    if (s->buttons_state & MOUSE_EVENT_MBUTTON)

        b |= 0x20; /* eraser */

    if (len < 7)

        return 0;

    buf[0] = s->mode;

    buf[5] = 0x00 | (b & 0xf0);

    buf[1] = s->x & 0xff;

    buf[2] = s->x >> 8;

    buf[3] = s->y & 0xff;

    buf[4] = s->y >> 8;

    if (b & 0x3f) {

        buf[6] = 0;

    } else {

        buf[6] = (unsigned char) -127;

    }

    return 7;

}

static void usb_wacom_handle_reset(USBDevice *dev)

{

    USBWacomState *s = (USBWacomState *) dev;

    s->dx = 0;

    s->dy = 0;

    s->dz = 0;

    s->x = 0;

    s->y = 0;

    s->buttons_state = 0;

    s->mode = WACOM_MODE_HID;

}

static int usb_wacom_handle_control(USBDevice *dev, USBPacket *p,

               int request, int value, int index, int length, uint8_t *data)

{

    USBWacomState *s = (USBWacomState *) dev;

    int ret;

    ret = usb_desc_handle_control(dev, p, request, value, index, length, data);

    if (ret >= 0) {

        return ret;

    }

    ret = 0;

    switch (request) {

    case WACOM_SET_REPORT:

        if (s->mouse_grabbed) {

            qemu_remove_mouse_event_handler(s->eh_entry);

            s->mouse_grabbed = 0;

        }

        s->mode = data[0];

        ret = 0;

        break;

    case WACOM_GET_REPORT:

        data[0] = 0;

        data[1] = s->mode;

        ret = 2;

        break;

    /* USB HID requests */

    case HID_GET_REPORT:

        if (s->mode == WACOM_MODE_HID)

            ret = usb_mouse_poll(s, data, length);

        else if (s->mode == WACOM_MODE_WACOM)

            ret = usb_wacom_poll(s, data, length);

        break;

    case HID_GET_IDLE:

        ret = 1;

        data[0] = s->idle;

        break;

    case HID_SET_IDLE:

        s->idle = (uint8_t) (value >> 8);

        ret = 0;

        break;

    default:

        ret = USB_RET_STALL;

        break;

    }

    return ret;

}

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

{

    USBWacomState *s = (USBWacomState *) dev;

    uint8_t buf[p->iov.size];

    int ret = 0;

    switch (p->pid) {

    case USB_TOKEN_IN:

        if (p->ep->nr == 1) {

            if (!(s->changed || s->idle))

                return USB_RET_NAK;

            s->changed = 0;

            if (s->mode == WACOM_MODE_HID)

                ret = usb_mouse_poll(s, buf, p->iov.size);

            else if (s->mode == WACOM_MODE_WACOM)

                ret = usb_wacom_poll(s, buf, p->iov.size);

            usb_packet_copy(p, buf, ret);

            break;

        }

        /* Fall through.  */

    case USB_TOKEN_OUT:

    default:

        ret = USB_RET_STALL;

        break;

    }

    return ret;

}

static void usb_wacom_handle_destroy(USBDevice *dev)

{

    USBWacomState *s = (USBWacomState *) dev;

    if (s->mouse_grabbed) {

        qemu_remove_mouse_event_handler(s->eh_entry);

        s->mouse_grabbed = 0;

    }

}

static int usb_wacom_initfn(USBDevice *dev)

{

    USBWacomState *s = DO_UPCAST(USBWacomState, dev, dev);

    usb_desc_init(dev);

    s->changed = 1;

    return 0;

}

static const VMStateDescription vmstate_usb_wacom = {

    .name = "usb-wacom",

    .unmigratable = 1,

};

static void usb_wacom_class_init(ObjectClass *klass, void *data)

{

    DeviceClass *dc = DEVICE_CLASS(klass);

    USBDeviceClass *uc = USB_DEVICE_CLASS(klass);

    uc->product_desc   = "QEMU PenPartner Tablet";

    uc->usb_desc       = &desc_wacom;

    uc->init           = usb_wacom_initfn;

    uc->handle_reset   = usb_wacom_handle_reset;

    uc->handle_control = usb_wacom_handle_control;

    uc->handle_data    = usb_wacom_handle_data;

    uc->handle_destroy = usb_wacom_handle_destroy;

    dc->desc = "QEMU PenPartner Tablet";

    dc->vmsd = &vmstate_usb_wacom;

}

static TypeInfo wacom_info = {

    .name          = "usb-wacom-tablet",

    .parent        = TYPE_USB_DEVICE,

    .instance_size = sizeof(USBWacomState),

    .class_init    = usb_wacom_class_init,

};

static void usb_wacom_register_devices(void)

{

    type_register_static(&wacom_info);

    usb_legacy_register("usb-wacom-tablet", "wacom-tablet", NULL);

}

device_init(usb_wacom_register_devices)