diff options
Diffstat (limited to 'src/hw/usb/dev-wacom.c')
| -rw-r--r-- | src/hw/usb/dev-wacom.c | 385 |
1 files changed, 385 insertions, 0 deletions
diff --git a/src/hw/usb/dev-wacom.c b/src/hw/usb/dev-wacom.c new file mode 100644 index 0000000..c2450e7 --- /dev/null +++ b/src/hw/usb/dev-wacom.c @@ -0,0 +1,385 @@ +/* + * 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 "ui/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; + USBEndpoint *intr; + 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; + +#define TYPE_USB_WACOM "usb-wacom-tablet" +#define USB_WACOM(obj) OBJECT_CHECK(USBWacomState, (obj), TYPE_USB_WACOM) + +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 = USB_CFG_ATT_ONE, + .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; + usb_wakeup(s->intr, 0); +} + +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; + usb_wakeup(s->intr, 0); +} + +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 void 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; + } + + 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]; + break; + case WACOM_GET_REPORT: + data[0] = 0; + data[1] = s->mode; + p->actual_length = 2; + break; + /* USB HID requests */ + case HID_GET_REPORT: + if (s->mode == WACOM_MODE_HID) + p->actual_length = usb_mouse_poll(s, data, length); + else if (s->mode == WACOM_MODE_WACOM) + p->actual_length = usb_wacom_poll(s, data, length); + break; + case HID_GET_IDLE: + data[0] = s->idle; + p->actual_length = 1; + break; + case HID_SET_IDLE: + s->idle = (uint8_t) (value >> 8); + break; + default: + p->status = USB_RET_STALL; + break; + } +} + +static void usb_wacom_handle_data(USBDevice *dev, USBPacket *p) +{ + USBWacomState *s = (USBWacomState *) dev; + uint8_t buf[p->iov.size]; + int len = 0; + + switch (p->pid) { + case USB_TOKEN_IN: + if (p->ep->nr == 1) { + if (!(s->changed || s->idle)) { + p->status = USB_RET_NAK; + return; + } + s->changed = 0; + if (s->mode == WACOM_MODE_HID) + len = usb_mouse_poll(s, buf, p->iov.size); + else if (s->mode == WACOM_MODE_WACOM) + len = usb_wacom_poll(s, buf, p->iov.size); + usb_packet_copy(p, buf, len); + break; + } + /* Fall through. */ + case USB_TOKEN_OUT: + default: + p->status = USB_RET_STALL; + } +} + +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 void usb_wacom_realize(USBDevice *dev, Error **errp) +{ + USBWacomState *s = USB_WACOM(dev); + usb_desc_create_serial(dev); + usb_desc_init(dev); + s->intr = usb_ep_get(dev, USB_TOKEN_IN, 1); + s->changed = 1; +} + +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->realize = usb_wacom_realize; + 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; + set_bit(DEVICE_CATEGORY_INPUT, dc->categories); + dc->desc = "QEMU PenPartner Tablet"; + dc->vmsd = &vmstate_usb_wacom; +} + +static const TypeInfo wacom_info = { + .name = TYPE_USB_WACOM, + .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(TYPE_USB_WACOM, "wacom-tablet", NULL); +} + +type_init(usb_wacom_register_types) |
