| /* |
| * 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/hw.h" |
| #include "console.h" |
| #include "hw/usb.h" |
| #include "hw/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", |
| [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_create_serial(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_types(void) |
| { |
| type_register_static(&wacom_info); |
| usb_legacy_register("usb-wacom-tablet", "wacom-tablet", NULL); |
| } |
| |
| type_init(usb_wacom_register_types) |
