From: Ricardo Ribalda Delgado <ricardo.riba...@uam.es>
New char device emulating an Elo serial touchpad.
v2: -Emulate id packages (linux recognizes the hw)
-Limit output to 96-4000 (thanks to Dmitry Zhurikhin)
v3: -Output buffer (thanks to Juan Quintela)
-Code Style
---
Makefile.objs | 2 +-
hw/elo.c | 189 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
hw/elo.h | 2 +
qemu-char.c | 3 +
qemu-options.hx | 5 +-
5 files changed, 199 insertions(+), 2 deletions(-)
create mode 100644 hw/elo.c
create mode 100644 hw/elo.h
diff --git a/Makefile.objs b/Makefile.objs
index b73e2cb..07c2e68 100644
--- a/Makefile.objs
+++ b/Makefile.objs
@@ -75,7 +75,7 @@ common-obj-y += bt.o bt-host.o bt-vhci.o bt-l2cap.o bt-sdp.o
bt-hci.o bt-hid.o u
common-obj-y += bt-hci-csr.o
common-obj-y += buffered_file.o migration.o migration-tcp.o qemu-sockets.o
common-obj-y += qemu-char.o savevm.o #aio.o
-common-obj-y += msmouse.o ps2.o
+common-obj-y += msmouse.o ps2.o elo.o
common-obj-y += qdev.o qdev-properties.o
common-obj-y += qemu-config.o block-migration.o
diff --git a/hw/elo.c b/hw/elo.c
new file mode 100644
index 0000000..d5b4124
--- /dev/null
+++ b/hw/elo.c
@@ -0,0 +1,189 @@
+/*
+ * QEMU ELO Touchpad via serial port
+ *
+ * Copyright (c) 2010 Ricardo Ribalda: QTechnology http://qtec.com
+ *
+ * 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 <stdlib.h>
+#include "qemu-common.h"
+#include "qemu-char.h"
+#include "console.h"
+#include "elo.h"
+
+#define ELO_DOWN 0x1
+#define ELO_MOVE 0x2
+#define ELO_UP 0x4
+#define ELO_PACKET_SIZE 10
+
+typedef struct {
+ CharDriverState chr;
+ uint8_t out_buf[ELO_PACKET_SIZE];
+ uint8_t send_out;
+} EloDriverState;
+
+static void elo_event(void *opaque,
+ int ax, int ay, int az, int buttons_state)
+{
+ EloDriverState *elo=(EloDriverState *)opaque;
+ CharDriverState *chr = &elo->chr;
+ unsigned char bytes[ELO_PACKET_SIZE];
+ static int is_down=0;
+ int old_ax=0,old_ay=0;
+ int i;
+
+ /*A touchpad cannot capture flight events*/
+ if ((!is_down)&&(!buttons_state))
+ return;
+
+ ax=(ax*(4000-96))/0x7fff;
+ ax+=96;
+ ay=(ay*(4000-96))/0x7fff;
+ ay+=96;
+
+ /*Move event*/
+ if (is_down&&buttons_state){
+ bytes[2]=ELO_MOVE;
+ is_down++;
+ if ((old_ay==ay)&&(old_ax==ax))
+ return;
+ /*SDL move is much more precise than the real elo*/
+ if (qemu_chr_can_read(chr)<ELO_PACKET_SIZE)
+ return;
+ old_ay=ay;
+ old_ax=ax;
+ is_down++;
+ }
+
+ /*Click*/
+ if ((!is_down)&&buttons_state){
+ bytes[2]=ELO_DOWN;
+ is_down=1;
+ old_ay=ay;
+ old_ax=ax;
+ }
+ /*Release*/
+ if (is_down&&(!buttons_state)){
+ bytes[2]=ELO_UP;
+ is_down=0;
+ }
+
+ bytes[0]='U';
+ bytes[1]='T';
+ bytes[3]=ax&0xff;
+ bytes[4]=(ax>>8)&0xff;
+ bytes[5]=ay&0xff;
+ bytes[6]=(ay>>8)&0xff;
+ bytes[7]=0x0;/*No presure capabilities*/
+ bytes[8]=0x0;
+ bytes[9]=0xaa;
+ for(i=0;i<9;i++)
+ bytes[9]+=bytes[i];
+
+ qemu_chr_read(chr, bytes, ELO_PACKET_SIZE);
+ return;
+}
+
+static int elo_chr_write(struct CharDriverState *s, const uint8_t *buf, int
len)
+{
+ EloDriverState *elo=(EloDriverState *)s->opaque;
+ unsigned char bytes[ELO_PACKET_SIZE];
+ static int in_cmd=0,i;
+
+ if (buf[0]==0x55)
+ in_cmd=0;
+
+ /*Only response to ID*/
+ in_cmd+=len;
+ if (in_cmd<ELO_PACKET_SIZE)
+ return len;
+
+ /* Only respond cmd ID This should be enough at least for linux*/
+ /*Full ref at
http://tge.cegep-baie-comeau.qc.ca/fichestech/References/Elo%20Touch%20Screen/smartset/pages/chapter_6.htm#command_descriptions*/
+ /*ID*/
+ in_cmd=0;
+ bytes[0]='U';
+ bytes[1]='I';
+ bytes[2]='0';/*Accu*/
+ bytes[3]='0';/*Serial*/
+ bytes[4]=0;/*No features*/
+ bytes[5]=1;
+ bytes[6]=2;
+ bytes[7]=1;/*1 response*/
+ bytes[8]=0xe;
+ bytes[9]=0xaa;
+ for(i=0;i<9;i++)
+ bytes[9]+=bytes[i];
+ qemu_chr_read(s, bytes, ELO_PACKET_SIZE);
+
+ /*ACK no err*/
+ in_cmd=0;
+ bytes[0]='U';
+ bytes[1]='A';
+ bytes[2]='0';
+ bytes[3]='0';
+ bytes[4]='0';
+ bytes[5]=0;
+ bytes[6]=0;
+ bytes[7]=0;
+ bytes[8]=0;
+ bytes[9]=0xaa;
+ for(i=0;i<9;i++)
+ bytes[9]+=bytes[i];
+ if (qemu_chr_can_read(s)<ELO_PACKET_SIZE){
+ elo->send_out=1;
+ memcpy(elo->out_buf,bytes,ELO_PACKET_SIZE);
+ in_cmd=0;
+ return len;
+ }
+ qemu_chr_read(s, bytes, ELO_PACKET_SIZE);
+ in_cmd=0;
+ return len;
+}
+
+static void elo_chr_accept_input(struct CharDriverState *chr){
+ EloDriverState *elo=(EloDriverState *)chr->opaque;
+
+ if (!elo->send_out)
+ return;
+ if (qemu_chr_can_read(chr)<ELO_PACKET_SIZE)
+ return;
+ qemu_chr_read(chr, elo->out_buf, ELO_PACKET_SIZE);
+ return;
+}
+
+static void elo_chr_close(struct CharDriverState *chr)
+{
+ qemu_free(chr->opaque);
+}
+
+CharDriverState *qemu_chr_open_elo(QemuOpts *opts)
+{
+ EloDriverState *elo;
+ elo = qemu_mallocz(sizeof(EloDriverState));
+ elo->chr.chr_write = elo_chr_write;
+ elo->chr.chr_close = elo_chr_close;
+ elo->chr.chr_accept_input= elo_chr_accept_input;
+ elo->chr.opaque=elo;
+ elo->send_out=0;
+
+ qemu_add_mouse_event_handler(elo_event, elo, 1, "QEMU Elo Touchpad");
+
+ return &elo->chr;
+}
diff --git a/hw/elo.h b/hw/elo.h
new file mode 100644
index 0000000..4b4e09a
--- /dev/null
+++ b/hw/elo.h
@@ -0,0 +1,2 @@
+/* elo.c */
+CharDriverState *qemu_chr_open_elo(QemuOpts *opts);
diff --git a/qemu-char.c b/qemu-char.c
index 40cfefa..2f95767 100644
--- a/qemu-char.c
+++ b/qemu-char.c
@@ -32,6 +32,7 @@
#include "hw/usb.h"
#include "hw/baum.h"
#include "hw/msmouse.h"
+#include "hw/elo.h"
#include "qemu-objects.h"
#include <unistd.h>
@@ -2278,6 +2279,7 @@ QemuOpts *qemu_chr_parse_compat(const char *label, const
char *filename)
if (strcmp(filename, "null") == 0 ||
strcmp(filename, "pty") == 0 ||
strcmp(filename, "msmouse") == 0 ||
+ strcmp(filename, "elo") == 0 ||
strcmp(filename, "braille") == 0 ||
strcmp(filename, "stdio") == 0) {
qemu_opt_set(opts, "backend", filename);
@@ -2391,6 +2393,7 @@ static const struct {
{ .name = "socket", .open = qemu_chr_open_socket },
{ .name = "udp", .open = qemu_chr_open_udp },
{ .name = "msmouse", .open = qemu_chr_open_msmouse },
+ { .name = "elo", .open = qemu_chr_open_elo },
{ .name = "vc", .open = text_console_init },
#ifdef _WIN32
{ .name = "file", .open = qemu_chr_open_win_file_out },
diff --git a/qemu-options.hx b/qemu-options.hx
index 7c33736..7ee62cb 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -1183,7 +1183,7 @@ DEF("chardev", HAS_ARG, QEMU_OPTION_chardev,
"-chardev socket,id=id,path=path[,server][,nowait][,telnet] (unix)\n"
"-chardev udp,id=id[,host=host],port=port[,localaddr=localaddr]\n"
" [,localport=localport][,ipv4][,ipv6]\n"
- "-chardev msmouse,id=id\n"
+ "-chardev elo,id=id\n"
"-chardev
vc,id=id[[,width=width][,height=height]][[,cols=cols][,rows=rows]]\n"
"-chardev file,id=id,path=path\n"
"-chardev pipe,id=id,path=path\n"
@@ -1650,6 +1650,9 @@ or fake device.
@item msmouse
Three button serial mouse. Configure the guest to use Microsoft protocol.
+
+...@item elo
+Elo Touchpad 10bytes emulator.
@end table
ETEXI
--
1.7.0.3
