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QEMU-Nyx-fork/hw/usb-wacom.c
Gerd Hoffmann 4f4321c11f usb: use iovecs in USBPacket 
Zap data pointer from USBPacket, add a QEMUIOVector instead.
Add a bunch of helper functions to manage USBPacket data.
Switch over users to the new interface.

Note that USBPacket->len was used for two purposes:  First to
pass in the buffer size and second to return the number of
transfered bytes or the status code on async transfers.  There
is a new result variable for the latter.  A new status code
was added to catch uninitialized result.

Nobody creates iovecs with more than one element (yet).
Some users are (temporarely) limited to iovecs with a single
element to keep the patch size as small as possible.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2011-08-04 15:51:22 +02:00

380 lines
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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"
#include "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 " QEMU_VERSION,
[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 DeviceRequest | USB_REQ_GET_INTERFACE:
data[0] = 0;
ret = 1;
break;
case DeviceOutRequest | USB_REQ_SET_INTERFACE:
ret = 0;
break;
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->devep == 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_init(dev);
s->changed = 1;
return 0;
}
static const VMStateDescription vmstate_usb_wacom = {
.name = "usb-wacom",
.unmigratable = 1,
};
static struct USBDeviceInfo wacom_info = {
.product_desc = "QEMU PenPartner Tablet",
.qdev.name = "usb-wacom-tablet",
.qdev.desc = "QEMU PenPartner Tablet",
.usbdevice_name = "wacom-tablet",
.usb_desc = &desc_wacom,
.qdev.size = sizeof(USBWacomState),
.qdev.vmsd = &vmstate_usb_wacom,
.init = usb_wacom_initfn,
.handle_packet = usb_generic_handle_packet,
.handle_reset = usb_wacom_handle_reset,
.handle_control = usb_wacom_handle_control,
.handle_data = usb_wacom_handle_data,
.handle_destroy = usb_wacom_handle_destroy,
};
static void usb_wacom_register_devices(void)
{
usb_qdev_register(&wacom_info);
}
device_init(usb_wacom_register_devices)
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