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qemu-e2k/hw/usb-wacom.c

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/*
* 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"
/* 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;
}
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