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author | Arwed Meyer <arwed.meyer@gmx.de> | 2022-09-11 20:18:36 +0200 |
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committer | Marc-André Lureau <marcandre.lureau@redhat.com> | 2022-09-29 14:38:05 +0400 |
commit | a39fe10557462648b8bee7aec5e24aad75ebd32d (patch) | |
tree | 6d28bbc15b4321353b7c9d23163dbedd4b123fa4 /chardev | |
parent | dbc4f48b5ab3e6d85f78aa4df6bd6ad561c3d152 (diff) | |
download | qemu-a39fe10557462648b8bee7aec5e24aad75ebd32d.zip qemu-a39fe10557462648b8bee7aec5e24aad75ebd32d.tar.gz qemu-a39fe10557462648b8bee7aec5e24aad75ebd32d.tar.bz2 |
msmouse: Handle mouse reset
Detect mouse reset via RTS or DTR line:
Don't send or process anything while in reset.
When coming out of reset, send ID sequence first thing.
This allows msmouse to be detected by common mouse drivers.
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/77
Signed-off-by: Arwed Meyer <arwed.meyer@gmx.de>
Acked-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20220911181840.8933-2-arwed.meyer@gmx.de>
Diffstat (limited to 'chardev')
-rw-r--r-- | chardev/msmouse.c | 63 |
1 files changed, 61 insertions, 2 deletions
diff --git a/chardev/msmouse.c b/chardev/msmouse.c index eb9231d..95fa488 100644 --- a/chardev/msmouse.c +++ b/chardev/msmouse.c @@ -25,17 +25,20 @@ #include "qemu/osdep.h" #include "qemu/module.h" #include "chardev/char.h" +#include "chardev/char-serial.h" #include "ui/console.h" #include "ui/input.h" #include "qom/object.h" -#define MSMOUSE_LO6(n) ((n) & 0x3f) -#define MSMOUSE_HI2(n) (((n) & 0xc0) >> 6) +#define MSMOUSE_LO6(n) ((n) & 0x3f) +#define MSMOUSE_HI2(n) (((n) & 0xc0) >> 6) +#define MSMOUSE_PWR(cm) (cm & (CHR_TIOCM_RTS | CHR_TIOCM_DTR)) struct MouseChardev { Chardev parent; QemuInputHandlerState *hs; + int tiocm; int axis[INPUT_AXIS__MAX]; bool btns[INPUT_BUTTON__MAX]; bool btnc[INPUT_BUTTON__MAX]; @@ -109,6 +112,11 @@ static void msmouse_input_event(DeviceState *dev, QemuConsole *src, InputMoveEvent *move; InputBtnEvent *btn; + /* Ignore events if serial mouse powered down. */ + if (!MSMOUSE_PWR(mouse->tiocm)) { + return; + } + switch (evt->type) { case INPUT_EVENT_KIND_REL: move = evt->u.rel.data; @@ -132,6 +140,11 @@ static void msmouse_input_sync(DeviceState *dev) MouseChardev *mouse = MOUSE_CHARDEV(dev); Chardev *chr = CHARDEV(dev); + /* Ignore events if serial mouse powered down. */ + if (!MSMOUSE_PWR(mouse->tiocm)) { + return; + } + msmouse_queue_event(mouse); msmouse_chr_accept_input(chr); } @@ -142,6 +155,50 @@ static int msmouse_chr_write(struct Chardev *s, const uint8_t *buf, int len) return len; } +static int msmouse_ioctl(Chardev *chr, int cmd, void *arg) +{ + MouseChardev *mouse = MOUSE_CHARDEV(chr); + int c; + int *targ = (int *)arg; + + switch (cmd) { + case CHR_IOCTL_SERIAL_SET_TIOCM: + c = mouse->tiocm; + mouse->tiocm = *(int *)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. + */ + mouse->outbuf[0] = 'M'; + mouse->outbuf[1] = '3'; + mouse->outlen = 2; + /* Start sending data to serial. */ + msmouse_chr_accept_input(chr); + } + break; + } + /* + * Reset mouse buffers on power down. + * Mouse won't send anything without power. + */ + mouse->outlen = 0; + memset(mouse->axis, 0, sizeof(mouse->axis)); + memset(mouse->btns, false, sizeof(mouse->btns)); + memset(mouse->btnc, false, sizeof(mouse->btns)); + break; + case CHR_IOCTL_SERIAL_GET_TIOCM: + /* Remember line control status. */ + *targ = mouse->tiocm; + break; + default: + return -ENOTSUP; + } + return 0; +} + static void char_msmouse_finalize(Object *obj) { MouseChardev *mouse = MOUSE_CHARDEV(obj); @@ -166,6 +223,7 @@ static void msmouse_chr_open(Chardev *chr, *be_opened = false; mouse->hs = qemu_input_handler_register((DeviceState *)mouse, &msmouse_handler); + mouse->tiocm = 0; } static void char_msmouse_class_init(ObjectClass *oc, void *data) @@ -175,6 +233,7 @@ static void char_msmouse_class_init(ObjectClass *oc, void *data) cc->open = msmouse_chr_open; cc->chr_write = msmouse_chr_write; cc->chr_accept_input = msmouse_chr_accept_input; + cc->chr_ioctl = msmouse_ioctl; } static const TypeInfo char_msmouse_type_info = { |