root / hw / usb-wacom.c @ 556cd098
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/*
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* Wacom PenPartner USB tablet emulation.
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*
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* Copyright (c) 2006 Openedhand Ltd.
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* Author: Andrzej Zaborowski <balrog@zabor.org>
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*
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* Based on hw/usb-hid.c:
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* Copyright (c) 2005 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "hw.h" |
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#include "console.h" |
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#include "usb.h" |
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|
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/* Interface requests */
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#define WACOM_GET_REPORT 0x2101 |
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#define WACOM_SET_REPORT 0x2109 |
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|
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/* HID interface requests */
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#define HID_GET_REPORT 0xa101 |
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#define HID_GET_IDLE 0xa102 |
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#define HID_GET_PROTOCOL 0xa103 |
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#define HID_SET_IDLE 0x210a |
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#define HID_SET_PROTOCOL 0x210b |
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|
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typedef struct USBWacomState { |
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USBDevice dev; |
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QEMUPutMouseEntry *eh_entry; |
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int dx, dy, dz, buttons_state;
|
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int x, y;
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int mouse_grabbed;
|
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enum {
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WACOM_MODE_HID = 1,
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WACOM_MODE_WACOM = 2,
|
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} mode; |
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uint8_t idle; |
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int changed;
|
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} USBWacomState; |
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|
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static const uint8_t qemu_wacom_dev_descriptor[] = { |
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0x12, /* u8 bLength; */ |
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0x01, /* u8 bDescriptorType; Device */ |
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0x10, 0x10, /* u16 bcdUSB; v1.10 */ |
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|
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0x00, /* u8 bDeviceClass; */ |
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0x00, /* u8 bDeviceSubClass; */ |
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0x00, /* u8 bDeviceProtocol; [ low/full speeds only ] */ |
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0x08, /* u8 bMaxPacketSize0; 8 Bytes */ |
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|
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0x6a, 0x05, /* u16 idVendor; */ |
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0x00, 0x00, /* u16 idProduct; */ |
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0x10, 0x42, /* u16 bcdDevice */ |
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|
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0x01, /* u8 iManufacturer; */ |
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0x02, /* u8 iProduct; */ |
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0x00, /* u8 iSerialNumber; */ |
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0x01, /* u8 bNumConfigurations; */ |
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}; |
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|
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static const uint8_t qemu_wacom_config_descriptor[] = { |
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/* one configuration */
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0x09, /* u8 bLength; */ |
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0x02, /* u8 bDescriptorType; Configuration */ |
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0x22, 0x00, /* u16 wTotalLength; */ |
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0x01, /* u8 bNumInterfaces; (1) */ |
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0x01, /* u8 bConfigurationValue; */ |
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0x00, /* u8 iConfiguration; */ |
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0x80, /* u8 bmAttributes; |
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Bit 7: must be set,
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6: Self-powered,
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5: Remote wakeup,
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4..0: resvd */
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40, /* u8 MaxPower; */ |
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|
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/* one interface */
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0x09, /* u8 if_bLength; */ |
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0x04, /* u8 if_bDescriptorType; Interface */ |
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0x00, /* u8 if_bInterfaceNumber; */ |
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0x00, /* u8 if_bAlternateSetting; */ |
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0x01, /* u8 if_bNumEndpoints; */ |
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0x03, /* u8 if_bInterfaceClass; HID */ |
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0x01, /* u8 if_bInterfaceSubClass; Boot */ |
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0x02, /* u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ |
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0x00, /* u8 if_iInterface; */ |
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|
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/* HID descriptor */
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0x09, /* u8 bLength; */ |
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0x21, /* u8 bDescriptorType; */ |
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0x01, 0x10, /* u16 HID_class */ |
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0x00, /* u8 country_code */ |
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0x01, /* u8 num_descriptors */ |
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0x22, /* u8 type; Report */ |
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0x6e, 0x00, /* u16 len */ |
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|
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/* one endpoint (status change endpoint) */
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0x07, /* u8 ep_bLength; */ |
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0x05, /* u8 ep_bDescriptorType; Endpoint */ |
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0x81, /* u8 ep_bEndpointAddress; IN Endpoint 1 */ |
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0x03, /* u8 ep_bmAttributes; Interrupt */ |
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0x08, 0x00, /* u16 ep_wMaxPacketSize; */ |
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0x0a, /* u8 ep_bInterval; */ |
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}; |
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|
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static void usb_mouse_event(void *opaque, |
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int dx1, int dy1, int dz1, int buttons_state) |
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{
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USBWacomState *s = opaque; |
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|
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s->dx += dx1; |
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s->dy += dy1; |
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s->dz += dz1; |
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s->buttons_state = buttons_state; |
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s->changed = 1;
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} |
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|
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static void usb_wacom_event(void *opaque, |
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int x, int y, int dz, int buttons_state) |
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{
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USBWacomState *s = opaque; |
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|
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/* scale to Penpartner resolution */
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s->x = (x * 5040 / 0x7FFF); |
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s->y = (y * 3780 / 0x7FFF); |
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s->dz += dz; |
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s->buttons_state = buttons_state; |
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s->changed = 1;
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} |
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|
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static inline int int_clamp(int val, int vmin, int vmax) |
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{
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if (val < vmin)
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return vmin;
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else if (val > vmax) |
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return vmax;
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else
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return val;
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} |
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|
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static int usb_mouse_poll(USBWacomState *s, uint8_t *buf, int len) |
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{
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int dx, dy, dz, b, l;
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if (!s->mouse_grabbed) {
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s->eh_entry = qemu_add_mouse_event_handler(usb_mouse_event, s, 0,
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"QEMU PenPartner tablet");
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s->mouse_grabbed = 1;
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} |
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dx = int_clamp(s->dx, -128, 127); |
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dy = int_clamp(s->dy, -128, 127); |
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dz = int_clamp(s->dz, -128, 127); |
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s->dx -= dx; |
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s->dy -= dy; |
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s->dz -= dz; |
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b = 0;
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if (s->buttons_state & MOUSE_EVENT_LBUTTON)
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b |= 0x01;
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if (s->buttons_state & MOUSE_EVENT_RBUTTON)
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b |= 0x02;
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if (s->buttons_state & MOUSE_EVENT_MBUTTON)
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b |= 0x04;
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buf[0] = b;
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buf[1] = dx;
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buf[2] = dy;
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l = 3;
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if (len >= 4) { |
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buf[3] = dz;
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l = 4;
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} |
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return l;
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} |
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static int usb_wacom_poll(USBWacomState *s, uint8_t *buf, int len) |
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{
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int b;
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if (!s->mouse_grabbed) {
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s->eh_entry = qemu_add_mouse_event_handler(usb_wacom_event, s, 1,
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"QEMU PenPartner tablet");
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s->mouse_grabbed = 1;
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} |
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b = 0;
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if (s->buttons_state & MOUSE_EVENT_LBUTTON)
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b |= 0x01;
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if (s->buttons_state & MOUSE_EVENT_RBUTTON)
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b |= 0x40;
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if (s->buttons_state & MOUSE_EVENT_MBUTTON)
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b |= 0x20; /* eraser */ |
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if (len < 7) |
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return 0; |
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|
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buf[0] = s->mode;
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buf[5] = 0x00 | (b & 0xf0); |
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buf[1] = s->x & 0xff; |
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buf[2] = s->x >> 8; |
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buf[3] = s->y & 0xff; |
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buf[4] = s->y >> 8; |
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if (b & 0x3f) { |
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buf[6] = 0; |
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} else {
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buf[6] = (unsigned char) -127; |
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} |
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return 7; |
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} |
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|
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static void usb_wacom_handle_reset(USBDevice *dev) |
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{
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USBWacomState *s = (USBWacomState *) dev; |
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|
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s->dx = 0;
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s->dy = 0;
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s->dz = 0;
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s->x = 0;
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s->y = 0;
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s->buttons_state = 0;
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s->mode = WACOM_MODE_HID; |
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} |
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|
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static int usb_wacom_handle_control(USBDevice *dev, int request, int value, |
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int index, int length, uint8_t *data) |
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{
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USBWacomState *s = (USBWacomState *) dev; |
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int ret = 0; |
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|
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switch (request) {
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case DeviceRequest | USB_REQ_GET_STATUS:
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data[0] = (1 << USB_DEVICE_SELF_POWERED) | |
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(dev->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP); |
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data[1] = 0x00; |
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ret = 2;
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break;
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case DeviceOutRequest | USB_REQ_CLEAR_FEATURE:
|
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if (value == USB_DEVICE_REMOTE_WAKEUP) {
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dev->remote_wakeup = 0;
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} else {
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goto fail;
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} |
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ret = 0;
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break;
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case DeviceOutRequest | USB_REQ_SET_FEATURE:
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if (value == USB_DEVICE_REMOTE_WAKEUP) {
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dev->remote_wakeup = 1;
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} else {
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goto fail;
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} |
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ret = 0;
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break;
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case DeviceOutRequest | USB_REQ_SET_ADDRESS:
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dev->addr = value; |
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ret = 0;
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break;
|
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case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
|
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switch (value >> 8) { |
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case USB_DT_DEVICE:
|
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memcpy(data, qemu_wacom_dev_descriptor, |
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sizeof(qemu_wacom_dev_descriptor));
|
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ret = sizeof(qemu_wacom_dev_descriptor);
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break;
|
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case USB_DT_CONFIG:
|
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memcpy(data, qemu_wacom_config_descriptor, |
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sizeof(qemu_wacom_config_descriptor));
|
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ret = sizeof(qemu_wacom_config_descriptor);
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break;
|
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case USB_DT_STRING:
|
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switch (value & 0xff) { |
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case 0: |
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/* language ids */
|
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data[0] = 4; |
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data[1] = 3; |
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data[2] = 0x09; |
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data[3] = 0x04; |
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ret = 4;
|
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break;
|
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case 1: |
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/* serial number */
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ret = set_usb_string(data, "1");
|
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break;
|
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case 2: |
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ret = set_usb_string(data, "Wacom PenPartner");
|
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break;
|
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case 3: |
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/* vendor description */
|
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ret = set_usb_string(data, "QEMU " QEMU_VERSION);
|
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break;
|
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case 4: |
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ret = set_usb_string(data, "Wacom Tablet");
|
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break;
|
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case 5: |
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ret = set_usb_string(data, "Endpoint1 Interrupt Pipe");
|
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break;
|
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default:
|
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goto fail;
|
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} |
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break;
|
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default:
|
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goto fail;
|
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} |
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break;
|
| 322 |
case DeviceRequest | USB_REQ_GET_CONFIGURATION:
|
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data[0] = 1; |
| 324 |
ret = 1;
|
| 325 |
break;
|
| 326 |
case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
|
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ret = 0;
|
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break;
|
| 329 |
case DeviceRequest | USB_REQ_GET_INTERFACE:
|
| 330 |
data[0] = 0; |
| 331 |
ret = 1;
|
| 332 |
break;
|
| 333 |
case DeviceOutRequest | USB_REQ_SET_INTERFACE:
|
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ret = 0;
|
| 335 |
break;
|
| 336 |
case WACOM_SET_REPORT:
|
| 337 |
qemu_remove_mouse_event_handler(s->eh_entry); |
| 338 |
s->mouse_grabbed = 0;
|
| 339 |
s->mode = data[0];
|
| 340 |
ret = 0;
|
| 341 |
break;
|
| 342 |
case WACOM_GET_REPORT:
|
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data[0] = 0; |
| 344 |
data[1] = s->mode;
|
| 345 |
ret = 2;
|
| 346 |
break;
|
| 347 |
/* USB HID requests */
|
| 348 |
case HID_GET_REPORT:
|
| 349 |
if (s->mode == WACOM_MODE_HID)
|
| 350 |
ret = usb_mouse_poll(s, data, length); |
| 351 |
else if (s->mode == WACOM_MODE_WACOM) |
| 352 |
ret = usb_wacom_poll(s, data, length); |
| 353 |
break;
|
| 354 |
case HID_GET_IDLE:
|
| 355 |
ret = 1;
|
| 356 |
data[0] = s->idle;
|
| 357 |
break;
|
| 358 |
case HID_SET_IDLE:
|
| 359 |
s->idle = (uint8_t) (value >> 8);
|
| 360 |
ret = 0;
|
| 361 |
break;
|
| 362 |
default:
|
| 363 |
fail:
|
| 364 |
ret = USB_RET_STALL; |
| 365 |
break;
|
| 366 |
} |
| 367 |
return ret;
|
| 368 |
} |
| 369 |
|
| 370 |
static int usb_wacom_handle_data(USBDevice *dev, USBPacket *p) |
| 371 |
{
|
| 372 |
USBWacomState *s = (USBWacomState *) dev; |
| 373 |
int ret = 0; |
| 374 |
|
| 375 |
switch (p->pid) {
|
| 376 |
case USB_TOKEN_IN:
|
| 377 |
if (p->devep == 1) { |
| 378 |
if (!(s->changed || s->idle))
|
| 379 |
return USB_RET_NAK;
|
| 380 |
s->changed = 0;
|
| 381 |
if (s->mode == WACOM_MODE_HID)
|
| 382 |
ret = usb_mouse_poll(s, p->data, p->len); |
| 383 |
else if (s->mode == WACOM_MODE_WACOM) |
| 384 |
ret = usb_wacom_poll(s, p->data, p->len); |
| 385 |
break;
|
| 386 |
} |
| 387 |
/* Fall through. */
|
| 388 |
case USB_TOKEN_OUT:
|
| 389 |
default:
|
| 390 |
ret = USB_RET_STALL; |
| 391 |
break;
|
| 392 |
} |
| 393 |
return ret;
|
| 394 |
} |
| 395 |
|
| 396 |
static void usb_wacom_handle_destroy(USBDevice *dev) |
| 397 |
{
|
| 398 |
USBWacomState *s = (USBWacomState *) dev; |
| 399 |
|
| 400 |
qemu_remove_mouse_event_handler(s->eh_entry); |
| 401 |
} |
| 402 |
|
| 403 |
static int usb_wacom_initfn(USBDevice *dev) |
| 404 |
{
|
| 405 |
USBWacomState *s = DO_UPCAST(USBWacomState, dev, dev); |
| 406 |
s->dev.speed = USB_SPEED_FULL; |
| 407 |
s->changed = 1;
|
| 408 |
return 0; |
| 409 |
} |
| 410 |
|
| 411 |
static struct USBDeviceInfo wacom_info = { |
| 412 |
.product_desc = "QEMU PenPartner Tablet",
|
| 413 |
.qdev.name = "usb-wacom-tablet",
|
| 414 |
.qdev.desc = "QEMU PenPartner Tablet",
|
| 415 |
.usbdevice_name = "wacom-tablet",
|
| 416 |
.qdev.size = sizeof(USBWacomState),
|
| 417 |
.init = usb_wacom_initfn, |
| 418 |
.handle_packet = usb_generic_handle_packet, |
| 419 |
.handle_reset = usb_wacom_handle_reset, |
| 420 |
.handle_control = usb_wacom_handle_control, |
| 421 |
.handle_data = usb_wacom_handle_data, |
| 422 |
.handle_destroy = usb_wacom_handle_destroy, |
| 423 |
}; |
| 424 |
|
| 425 |
static void usb_wacom_register_devices(void) |
| 426 |
{
|
| 427 |
usb_qdev_register(&wacom_info); |
| 428 |
} |
| 429 |
device_init(usb_wacom_register_devices) |