/*
 * 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/hw.h"
#include "console.h"
#include "hw/usb.h"
#include "hw/usb/desc.h"
#include "qemu-timer.h"
#include "hw/hid.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

typedef struct USBHIDState {
    USBDevice dev;
    USBEndpoint *intr;
    HIDState hid;
} USBHIDState;

enum {
    STR_MANUFACTURER = 1,
    STR_PRODUCT_MOUSE,
    STR_PRODUCT_TABLET,
    STR_PRODUCT_KEYBOARD,
    STR_SERIALNUMBER,
    STR_CONFIG_MOUSE,
    STR_CONFIG_TABLET,
    STR_CONFIG_KEYBOARD,
};

static const USBDescStrings desc_strings = {
    [STR_MANUFACTURER]     = "QEMU",
    [STR_PRODUCT_MOUSE]    = "QEMU USB Mouse",
    [STR_PRODUCT_TABLET]   = "QEMU USB Tablet",
    [STR_PRODUCT_KEYBOARD] = "QEMU USB Keyboard",
    [STR_SERIALNUMBER]     = "42", /* == remote wakeup works */
    [STR_CONFIG_MOUSE]     = "HID Mouse",
    [STR_CONFIG_TABLET]    = "HID Tablet",
    [STR_CONFIG_KEYBOARD]  = "HID Keyboard",
};

static const USBDescIface desc_iface_mouse = {
    .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 */
                USB_DT_HID,    /*  u8  bDescriptorType */
                0x01, 0x00,    /*  u16 HID_class */
                0x00,          /*  u8  country_code */
                0x01,          /*  u8  num_descriptors */
                USB_DT_REPORT, /*  u8  type: Report */
                52, 0,         /*  u16 len */
            },
        },
    },
    .eps = (USBDescEndpoint[]) {
        {
            .bEndpointAddress      = USB_DIR_IN | 0x01,
            .bmAttributes          = USB_ENDPOINT_XFER_INT,
            .wMaxPacketSize        = 4,
            .bInterval             = 0x0a,
        },
    },
};

static const USBDescIface desc_iface_tablet = {
    .bInterfaceNumber              = 0,
    .bNumEndpoints                 = 1,
    .bInterfaceClass               = USB_CLASS_HID,
    .bInterfaceProtocol            = 0x02,
    .ndesc                         = 1,
    .descs = (USBDescOther[]) {
        {
            /* HID descriptor */
            .data = (uint8_t[]) {
                0x09,          /*  u8  bLength */
                USB_DT_HID,    /*  u8  bDescriptorType */
                0x01, 0x00,    /*  u16 HID_class */
                0x00,          /*  u8  country_code */
                0x01,          /*  u8  num_descriptors */
                USB_DT_REPORT, /*  u8  type: Report */
                74, 0,         /*  u16 len */
            },
        },
    },
    .eps = (USBDescEndpoint[]) {
        {
            .bEndpointAddress      = USB_DIR_IN | 0x01,
            .bmAttributes          = USB_ENDPOINT_XFER_INT,
            .wMaxPacketSize        = 8,
            .bInterval             = 0x0a,
        },
    },
};

static const USBDescIface desc_iface_keyboard = {
    .bInterfaceNumber              = 0,
    .bNumEndpoints                 = 1,
    .bInterfaceClass               = USB_CLASS_HID,
    .bInterfaceSubClass            = 0x01, /* boot */
    .bInterfaceProtocol            = 0x01, /* keyboard */
    .ndesc                         = 1,
    .descs = (USBDescOther[]) {
        {
            /* HID descriptor */
            .data = (uint8_t[]) {
                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, 0,       /*  u16 len */
            },
        },
    },
    .eps = (USBDescEndpoint[]) {
        {
            .bEndpointAddress      = USB_DIR_IN | 0x01,
            .bmAttributes          = USB_ENDPOINT_XFER_INT,
            .wMaxPacketSize        = 8,
            .bInterval             = 0x0a,
        },
    },
};

static const USBDescDevice desc_device_mouse = {
    .bcdUSB                        = 0x0100,
    .bMaxPacketSize0               = 8,
    .bNumConfigurations            = 1,
    .confs = (USBDescConfig[]) {
        {
            .bNumInterfaces        = 1,
            .bConfigurationValue   = 1,
            .iConfiguration        = STR_CONFIG_MOUSE,
            .bmAttributes          = 0xa0,
            .bMaxPower             = 50,
            .nif = 1,
            .ifs = &desc_iface_mouse,
        },
    },
};

static const USBDescDevice desc_device_tablet = {
    .bcdUSB                        = 0x0100,
    .bMaxPacketSize0               = 8,
    .bNumConfigurations            = 1,
    .confs = (USBDescConfig[]) {
        {
            .bNumInterfaces        = 1,
            .bConfigurationValue   = 1,
            .iConfiguration        = STR_CONFIG_TABLET,
            .bmAttributes          = 0xa0,
            .bMaxPower             = 50,
            .nif = 1,
            .ifs = &desc_iface_tablet,
        },
    },
};

static const USBDescDevice desc_device_keyboard = {
    .bcdUSB                        = 0x0100,
    .bMaxPacketSize0               = 8,
    .bNumConfigurations            = 1,
    .confs = (USBDescConfig[]) {
        {
            .bNumInterfaces        = 1,
            .bConfigurationValue   = 1,
            .iConfiguration        = STR_CONFIG_KEYBOARD,
            .bmAttributes          = 0xa0,
            .bMaxPower             = 50,
            .nif = 1,
            .ifs = &desc_iface_keyboard,
        },
    },
};

static const USBDesc desc_mouse = {
    .id = {
        .idVendor          = 0x0627,
        .idProduct         = 0x0001,
        .bcdDevice         = 0,
        .iManufacturer     = STR_MANUFACTURER,
        .iProduct          = STR_PRODUCT_MOUSE,
        .iSerialNumber     = STR_SERIALNUMBER,
    },
    .full = &desc_device_mouse,
    .str  = desc_strings,
};

static const USBDesc desc_tablet = {
    .id = {
        .idVendor          = 0x0627,
        .idProduct         = 0x0001,
        .bcdDevice         = 0,
        .iManufacturer     = STR_MANUFACTURER,
        .iProduct          = STR_PRODUCT_TABLET,
        .iSerialNumber     = STR_SERIALNUMBER,
    },
    .full = &desc_device_tablet,
    .str  = desc_strings,
};

static const USBDesc desc_keyboard = {
    .id = {
        .idVendor          = 0x0627,
        .idProduct         = 0x0001,
        .bcdDevice         = 0,
        .iManufacturer     = STR_MANUFACTURER,
        .iProduct          = STR_PRODUCT_KEYBOARD,
        .iSerialNumber     = STR_SERIALNUMBER,
    },
    .full = &desc_device_keyboard,
    .str  = desc_strings,
};

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 */
};

static void usb_hid_changed(HIDState *hs)
{
    USBHIDState *us = container_of(hs, USBHIDState, hid);

    usb_wakeup(us->intr);
}

static void usb_hid_handle_reset(USBDevice *dev)
{
    USBHIDState *us = DO_UPCAST(USBHIDState, dev, dev);

    hid_reset(&us->hid);
}

static void usb_hid_handle_control(USBDevice *dev, USBPacket *p,
               int request, int value, int index, int length, uint8_t *data)
{
    USBHIDState *us = DO_UPCAST(USBHIDState, dev, dev);
    HIDState *hs = &us->hid;
    int ret;

    ret = usb_desc_handle_control(dev, p, request, value, index, length, data);
    if (ret >= 0) {
        return;
    }

    switch (request) {
        /* hid specific requests */
    case InterfaceRequest | USB_REQ_GET_DESCRIPTOR:
        switch (value >> 8) {
        case 0x22:
            if (hs->kind == HID_MOUSE) {
		memcpy(data, qemu_mouse_hid_report_descriptor,
		       sizeof(qemu_mouse_hid_report_descriptor));
                p->actual_length = sizeof(qemu_mouse_hid_report_descriptor);
            } else if (hs->kind == HID_TABLET) {
                memcpy(data, qemu_tablet_hid_report_descriptor,
		       sizeof(qemu_tablet_hid_report_descriptor));
                p->actual_length = sizeof(qemu_tablet_hid_report_descriptor);
            } else if (hs->kind == HID_KEYBOARD) {
                memcpy(data, qemu_keyboard_hid_report_descriptor,
                       sizeof(qemu_keyboard_hid_report_descriptor));
                p->actual_length = sizeof(qemu_keyboard_hid_report_descriptor);
            }
            break;
        default:
            goto fail;
        }
        break;
    case GET_REPORT:
        if (hs->kind == HID_MOUSE || hs->kind == HID_TABLET) {
            p->actual_length = hid_pointer_poll(hs, data, length);
        } else if (hs->kind == HID_KEYBOARD) {
            p->actual_length = hid_keyboard_poll(hs, data, length);
        }
        break;
    case SET_REPORT:
        if (hs->kind == HID_KEYBOARD) {
            p->actual_length = hid_keyboard_write(hs, data, length);
        } else {
            goto fail;
        }
        break;
    case GET_PROTOCOL:
        if (hs->kind != HID_KEYBOARD && hs->kind != HID_MOUSE) {
            goto fail;
        }
        data[0] = hs->protocol;
        p->actual_length = 1;
        break;
    case SET_PROTOCOL:
        if (hs->kind != HID_KEYBOARD && hs->kind != HID_MOUSE) {
            goto fail;
        }
        hs->protocol = value;
        break;
    case GET_IDLE:
        data[0] = hs->idle;
        p->actual_length = 1;
        break;
    case SET_IDLE:
        hs->idle = (uint8_t) (value >> 8);
        hid_set_next_idle(hs, qemu_get_clock_ns(vm_clock));
        if (hs->kind == HID_MOUSE || hs->kind == HID_TABLET) {
            hid_pointer_activate(hs);
        }
        break;
    default:
    fail:
        p->status = USB_RET_STALL;
        break;
    }
}

static void usb_hid_handle_data(USBDevice *dev, USBPacket *p)
{
    USBHIDState *us = DO_UPCAST(USBHIDState, dev, dev);
    HIDState *hs = &us->hid;
    uint8_t buf[p->iov.size];
    int len = 0;

    switch (p->pid) {
    case USB_TOKEN_IN:
        if (p->ep->nr == 1) {
            int64_t curtime = qemu_get_clock_ns(vm_clock);
            if (hs->kind == HID_MOUSE || hs->kind == HID_TABLET) {
                hid_pointer_activate(hs);
            }
            if (!hid_has_events(hs) &&
                (!hs->idle || hs->next_idle_clock - curtime > 0)) {
                p->status = USB_RET_NAK;
                return;
            }
            hid_set_next_idle(hs, curtime);
            if (hs->kind == HID_MOUSE || hs->kind == HID_TABLET) {
                len = hid_pointer_poll(hs, buf, p->iov.size);
            } else if (hs->kind == HID_KEYBOARD) {
                len = hid_keyboard_poll(hs, buf, p->iov.size);
            }
            usb_packet_copy(p, buf, len);
        } else {
            goto fail;
        }
        break;
    case USB_TOKEN_OUT:
    default:
    fail:
        p->status = USB_RET_STALL;
        break;
    }
}

static void usb_hid_handle_destroy(USBDevice *dev)
{
    USBHIDState *us = DO_UPCAST(USBHIDState, dev, dev);

    hid_free(&us->hid);
}

static int usb_hid_initfn(USBDevice *dev, int kind)
{
    USBHIDState *us = DO_UPCAST(USBHIDState, dev, dev);

    usb_desc_init(dev);
    us->intr = usb_ep_get(dev, USB_TOKEN_IN, 1);
    hid_init(&us->hid, kind, usb_hid_changed);
    return 0;
}

static int usb_tablet_initfn(USBDevice *dev)
{
    return usb_hid_initfn(dev, HID_TABLET);
}

static int usb_mouse_initfn(USBDevice *dev)
{
    return usb_hid_initfn(dev, HID_MOUSE);
}

static int usb_keyboard_initfn(USBDevice *dev)
{
    return usb_hid_initfn(dev, HID_KEYBOARD);
}

static int usb_ptr_post_load(void *opaque, int version_id)
{
    USBHIDState *s = opaque;

    if (s->dev.remote_wakeup) {
        hid_pointer_activate(&s->hid);
    }
    return 0;
}

static const VMStateDescription vmstate_usb_ptr = {
    .name = "usb-ptr",
    .version_id = 1,
    .minimum_version_id = 1,
    .post_load = usb_ptr_post_load,
    .fields = (VMStateField []) {
        VMSTATE_USB_DEVICE(dev, USBHIDState),
        VMSTATE_HID_POINTER_DEVICE(hid, USBHIDState),
        VMSTATE_END_OF_LIST()
    }
};

static const VMStateDescription vmstate_usb_kbd = {
    .name = "usb-kbd",
    .version_id = 1,
    .minimum_version_id = 1,
    .fields = (VMStateField []) {
        VMSTATE_USB_DEVICE(dev, USBHIDState),
        VMSTATE_HID_KEYBOARD_DEVICE(hid, USBHIDState),
        VMSTATE_END_OF_LIST()
    }
};

static void usb_hid_class_initfn(ObjectClass *klass, void *data)
{
    USBDeviceClass *uc = USB_DEVICE_CLASS(klass);

    uc->handle_reset   = usb_hid_handle_reset;
    uc->handle_control = usb_hid_handle_control;
    uc->handle_data    = usb_hid_handle_data;
    uc->handle_destroy = usb_hid_handle_destroy;
}

static void usb_tablet_class_initfn(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);
    USBDeviceClass *uc = USB_DEVICE_CLASS(klass);

    usb_hid_class_initfn(klass, data);
    uc->init           = usb_tablet_initfn;
    uc->product_desc   = "QEMU USB Tablet";
    uc->usb_desc       = &desc_tablet;
    dc->vmsd = &vmstate_usb_ptr;
}

static TypeInfo usb_tablet_info = {
    .name          = "usb-tablet",
    .parent        = TYPE_USB_DEVICE,
    .instance_size = sizeof(USBHIDState),
    .class_init    = usb_tablet_class_initfn,
};

static void usb_mouse_class_initfn(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);
    USBDeviceClass *uc = USB_DEVICE_CLASS(klass);

    usb_hid_class_initfn(klass, data);
    uc->init           = usb_mouse_initfn;
    uc->product_desc   = "QEMU USB Mouse";
    uc->usb_desc       = &desc_mouse;
    dc->vmsd = &vmstate_usb_ptr;
}

static TypeInfo usb_mouse_info = {
    .name          = "usb-mouse",
    .parent        = TYPE_USB_DEVICE,
    .instance_size = sizeof(USBHIDState),
    .class_init    = usb_mouse_class_initfn,
};

static void usb_keyboard_class_initfn(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);
    USBDeviceClass *uc = USB_DEVICE_CLASS(klass);

    usb_hid_class_initfn(klass, data);
    uc->init           = usb_keyboard_initfn;
    uc->product_desc   = "QEMU USB Keyboard";
    uc->usb_desc       = &desc_keyboard;
    dc->vmsd = &vmstate_usb_kbd;
}

static TypeInfo usb_keyboard_info = {
    .name          = "usb-kbd",
    .parent        = TYPE_USB_DEVICE,
    .instance_size = sizeof(USBHIDState),
    .class_init    = usb_keyboard_class_initfn,
};

static void usb_hid_register_types(void)
{
    type_register_static(&usb_tablet_info);
    usb_legacy_register("usb-tablet", "tablet", NULL);
    type_register_static(&usb_mouse_info);
    usb_legacy_register("usb-mouse", "mouse", NULL);
    type_register_static(&usb_keyboard_info);
    usb_legacy_register("usb-kbd", "keyboard", NULL);
}

type_init(usb_hid_register_types)
