diff options
Diffstat (limited to 'hw/usb-wacom.c')
| -rw-r--r-- | hw/usb-wacom.c | 412 |
1 files changed, 412 insertions, 0 deletions
diff --git a/hw/usb-wacom.c b/hw/usb-wacom.c new file mode 100644 index 0000000000..0acafaa88c --- /dev/null +++ b/hw/usb-wacom.c @@ -0,0 +1,412 @@ +/* + * 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 "vl.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; +} USBWacomState; + +static const uint8_t qemu_wacom_dev_descriptor[] = { + 0x12, /* u8 bLength; */ + 0x01, /* u8 bDescriptorType; Device */ + 0x10, 0x10, /* u16 bcdUSB; v1.10 */ + + 0x00, /* u8 bDeviceClass; */ + 0x00, /* u8 bDeviceSubClass; */ + 0x00, /* u8 bDeviceProtocol; [ low/full speeds only ] */ + 0x08, /* u8 bMaxPacketSize0; 8 Bytes */ + + 0x6a, 0x05, /* u16 idVendor; */ + 0x00, 0x00, /* u16 idProduct; */ + 0x10, 0x42, /* u16 bcdDevice */ + + 0x01, /* u8 iManufacturer; */ + 0x02, /* u8 iProduct; */ + 0x00, /* u8 iSerialNumber; */ + 0x01, /* u8 bNumConfigurations; */ +}; + +static const uint8_t qemu_wacom_config_descriptor[] = { + /* one configuration */ + 0x09, /* u8 bLength; */ + 0x02, /* u8 bDescriptorType; Configuration */ + 0x22, 0x00, /* u16 wTotalLength; */ + 0x01, /* u8 bNumInterfaces; (1) */ + 0x01, /* u8 bConfigurationValue; */ + 0x00, /* u8 iConfiguration; */ + 0x80, /* u8 bmAttributes; + Bit 7: must be set, + 6: Self-powered, + 5: Remote wakeup, + 4..0: resvd */ + 40, /* u8 MaxPower; */ + + /* 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; HID */ + 0x01, /* u8 if_bInterfaceSubClass; Boot */ + 0x02, /* u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ + 0x00, /* u8 if_iInterface; */ + + /* HID descriptor */ + 0x09, /* u8 bLength; */ + 0x21, /* u8 bDescriptorType; */ + 0x01, 0x10, /* u16 HID_class */ + 0x00, /* u8 country_code */ + 0x01, /* u8 num_descriptors */ + 0x22, /* u8 type; Report */ + 0x6e, 0x00, /* 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; */ + 0x0a, /* u8 ep_bInterval; */ +}; + +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; +} + +static void usb_wacom_event(void *opaque, + int x, int y, int dz, int buttons_state) +{ + USBWacomState *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(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"); + 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"); + s->mouse_grabbed = 1; + } + + 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; + + if (len < 7) + return 0; + + buf[0] = s->mode; + buf[5] = 0x00; + if (b) { + buf[1] = s->x & 0xff; + buf[2] = s->x >> 8; + buf[3] = s->y & 0xff; + buf[4] = s->y >> 8; + buf[6] = 0; + } else { + buf[1] = 0; + buf[2] = 0; + buf[3] = 0; + buf[4] = 0; + 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, int request, int value, + int index, int length, uint8_t *data) +{ + USBWacomState *s = (USBWacomState *) 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_wacom_dev_descriptor, + sizeof(qemu_wacom_dev_descriptor)); + ret = sizeof(qemu_wacom_dev_descriptor); + break; + case USB_DT_CONFIG: + memcpy(data, qemu_wacom_config_descriptor, + sizeof(qemu_wacom_config_descriptor)); + ret = sizeof(qemu_wacom_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: + ret = set_usb_string(data, "Wacom PenPartner"); + break; + case 3: + /* vendor description */ + ret = set_usb_string(data, "QEMU " QEMU_VERSION); + break; + case 4: + ret = set_usb_string(data, "Wacom Tablet"); + 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; + case WACOM_SET_REPORT: + 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_SET_IDLE: + ret = 0; + break; + default: + fail: + ret = USB_RET_STALL; + break; + } + return ret; +} + +static int usb_wacom_handle_data(USBDevice *dev, USBPacket *p) +{ + USBWacomState *s = (USBWacomState *) dev; + int ret = 0; + + switch (p->pid) { + case USB_TOKEN_IN: + if (p->devep == 1) { + if (s->mode == WACOM_MODE_HID) + ret = usb_mouse_poll(s, p->data, p->len); + else if (s->mode == WACOM_MODE_WACOM) + ret = usb_wacom_poll(s, p->data, p->len); + 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; + + qemu_remove_mouse_event_handler(s->eh_entry); + qemu_free(s); +} + +USBDevice *usb_wacom_init(void) +{ + USBWacomState *s; + + s = qemu_mallocz(sizeof(USBWacomState)); + if (!s) + return NULL; + s->dev.speed = USB_SPEED_FULL; + s->dev.handle_packet = usb_generic_handle_packet; + + s->dev.handle_reset = usb_wacom_handle_reset; + s->dev.handle_control = usb_wacom_handle_control; + s->dev.handle_data = usb_wacom_handle_data; + s->dev.handle_destroy = usb_wacom_handle_destroy; + + pstrcpy(s->dev.devname, sizeof(s->dev.devname), + "QEMU PenPartner Tablet"); + + return (USBDevice *) s; +} |