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msmouse: Add pnp data

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Make msmouse send serial pnp data.
Enables you to see nice qemu device name in Win9x.

Signed-off-by: Arwed Meyer <arwed.meyer@gmx.de>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20220911181840.8933-5-arwed.meyer@gmx.de>
This commit is contained in:
Arwed Meyer 2022-09-11 20:18:39 +02:00 committed by Marc-André Lureau
parent e0cf7f2307
commit 50d03d4852
1 changed files with 47 additions and 11 deletions
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58
chardev/msmouse.c
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@ -35,11 +35,24 @@
#define MSMOUSE_HI2(n) (((n) & 0xc0) >> 6)
#define MSMOUSE_PWR(cm) (cm & (CHR_TIOCM_RTS | CHR_TIOCM_DTR))
/* Serial PnP for 6 bit devices/mice sends all ASCII chars - 0x20 */
#define M(c) (c - 0x20)
/* Serial fifo size. */
#define MSMOUSE_BUF_SZ 64
/* Mouse ID: Send "M3" cause we behave like a 3 button logitech mouse. */
const uint8_t mouse_id[] = {'M', '3'};
/*
* PnP start "(", PnP version (1.0), vendor ID, product ID, '\\',
* serial ID (omitted), '\\', MS class name, '\\', driver ID (omitted), '\\',
* product description, checksum, ")"
* Missing parts are inserted later.
*/
const uint8_t pnp_data[] = {M('('), 1, '$', M('Q'), M('M'), M('U'),
M('0'), M('0'), M('0'), M('1'),
M('\\'), M('\\'),
M('M'), M('O'), M('U'), M('S'), M('E'),
M('\\'), M('\\')};
struct MouseChardev {
Chardev parent;
@ -158,11 +171,22 @@ static int msmouse_chr_write(struct Chardev *s, const uint8_t *buf, int len)
return len;
}
static QemuInputHandler msmouse_handler = {
.name = "QEMU Microsoft Mouse",
.mask = INPUT_EVENT_MASK_BTN | INPUT_EVENT_MASK_REL,
.event = msmouse_input_event,
.sync = msmouse_input_sync,
};
static int msmouse_ioctl(Chardev *chr, int cmd, void *arg)
{
MouseChardev *mouse = MOUSE_CHARDEV(chr);
int c;
int c, i, j;
uint8_t bytes[MSMOUSE_BUF_SZ / 2];
int *targ = (int *)arg;
const uint8_t hexchr[16] = {M('0'), M('1'), M('2'), M('3'), M('4'), M('5'),
M('6'), M('7'), M('8'), M('9'), M('A'), M('B'),
M('C'), M('D'), M('E'), M('F')};
switch (cmd) {
case CHR_IOCTL_SERIAL_SET_TIOCM:
@ -171,11 +195,30 @@ static int msmouse_ioctl(Chardev *chr, int cmd, void *arg)
if (MSMOUSE_PWR(mouse->tiocm)) {
if (!MSMOUSE_PWR(c)) {
/*
* Power on after reset: send "M3"
* cause we behave like a 3 button logitech
* mouse.
* Power on after reset: Send ID and PnP data
* No need to check fifo space as it is empty at this point.
*/
fifo8_push_all(&mouse->outbuf, mouse_id, sizeof(mouse_id));
/* Add PnP data: */
fifo8_push_all(&mouse->outbuf, pnp_data, sizeof(pnp_data));
/*
* Add device description from qemu handler name.
* Make sure this all fits into the queue beforehand!
*/
c = M(')');
for (i = 0; msmouse_handler.name[i]; i++) {
bytes[i] = M(msmouse_handler.name[i]);
c += bytes[i];
}
/* Calc more of checksum */
for (j = 0; j < sizeof(pnp_data); j++) {
c += pnp_data[j];
}
c &= 0xff;
bytes[i++] = hexchr[c >> 4];
bytes[i++] = hexchr[c & 0x0f];
bytes[i++] = M(')');
fifo8_push_all(&mouse->outbuf, bytes, i);
/* Start sending data to serial. */
msmouse_chr_accept_input(chr);
}
@ -208,13 +251,6 @@ static void char_msmouse_finalize(Object *obj)
fifo8_destroy(&mouse->outbuf);
}
static QemuInputHandler msmouse_handler = {
.name = "QEMU Microsoft Mouse",
.mask = INPUT_EVENT_MASK_BTN | INPUT_EVENT_MASK_REL,
.event = msmouse_input_event,
.sync = msmouse_input_sync,
};
static void msmouse_chr_open(Chardev *chr,
ChardevBackend *backend,
bool *be_opened,