haraldwolff/qemu-patch-raspberry4
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adb: add property to disable direct reg 3 writes

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MacOS 9 has a bug in its PMU driver whereby after configuring the ADB bus
devices it sends another write to reg 3 on both devices resetting them
both back to the same address.

Add a new disable_direct_reg3_writes property to ADBDevice to disable these
direct writes which can enabled just for the upcoming pmu-adb support.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Mark Cave-Ayland 2018-06-12 17:44:01 +01:00 committed by David Gibson
parent fb6649f172
commit 84051eb400
4 changed files with 42 additions and 28 deletions
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3
hw/input/adb-kbd.c
View file

@ -261,7 +261,9 @@ static int adb_kbd_request(ADBDevice *d, uint8_t *obuf,
trace_adb_kbd_request_change_addr(d->devaddr);
break;
default:
if (!d->disable_direct_reg3_writes) {
d->devaddr = buf[1] & 0xf;
/* we support handlers:
* 1: Apple Standard Keyboard
* 2: Apple Extended Keyboard (LShift = RShift)
@ -273,6 +275,7 @@ static int adb_kbd_request(ADBDevice *d, uint8_t *obuf,
trace_adb_kbd_request_change_addr_and_handler(d->devaddr,
d->handler);
}
break;
}
}

7
hw/input/adb-mouse.c
View file

@ -142,7 +142,9 @@ static int adb_mouse_request(ADBDevice *d, uint8_t *obuf,
trace_adb_mouse_request_change_addr(d->devaddr);
break;
default:
if (!d->disable_direct_reg3_writes) {
d->devaddr = buf[1] & 0xf;
/* we support handlers:
* 0x01: Classic Apple Mouse Protocol / 100 cpi operations
* 0x02: Classic Apple Mouse Protocol / 200 cpi operations
@ -158,8 +160,9 @@ static int adb_mouse_request(ADBDevice *d, uint8_t *obuf,
d->handler = buf[2];
}
trace_adb_mouse_request_change_addr_and_handler(d->devaddr,
d->handler);
trace_adb_mouse_request_change_addr_and_handler(
d->devaddr, d->handler);
}
break;
}
}

7
hw/input/adb.c
View file

@ -113,11 +113,18 @@ static void adb_device_realizefn(DeviceState *dev, Error **errp)
bus->devices[bus->nb_devices++] = d;
}
static Property adb_device_properties[] = {
DEFINE_PROP_BOOL("disable-direct-reg3-writes", ADBDevice,
disable_direct_reg3_writes, false),
DEFINE_PROP_END_OF_LIST(),
};
static void adb_device_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
dc->realize = adb_device_realizefn;
dc->props = adb_device_properties;
dc->bus_type = TYPE_ADB_BUS;
}

1
include/hw/input/adb.h
View file

@ -49,6 +49,7 @@ struct ADBDevice {
int devaddr;
int handler;
bool disable_direct_reg3_writes;
};
#define ADB_DEVICE_CLASS(cls) \