diff options
| author | Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> | 2018-06-12 17:44:01 +0100 |
|---|---|---|
| committer | David Gibson <david@gibson.dropbear.id.au> | 2018-06-16 16:32:33 +1000 |
| commit | 84051eb400495745035b52e27fe67b962b7a58fa (patch) | |
| tree | ce84d40f0677c11a4ff1739c8c1b5cab0be1a4c6 /hw/input/adb-mouse.c | |
| parent | fb6649f172d6ea1a8d8980b7f93d31808eb06ff8 (diff) | |
adb: add property to disable direct reg 3 writes
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>
Diffstat (limited to 'hw/input/adb-mouse.c')
| -rw-r--r-- | hw/input/adb-mouse.c | 37 |
1 files changed, 20 insertions, 17 deletions
diff --git a/hw/input/adb-mouse.c b/hw/input/adb-mouse.c index 473045fbac..83833b0035 100644 --- a/hw/input/adb-mouse.c +++ b/hw/input/adb-mouse.c @@ -142,24 +142,27 @@ static int adb_mouse_request(ADBDevice *d, uint8_t *obuf, trace_adb_mouse_request_change_addr(d->devaddr); break; default: - d->devaddr = buf[1] & 0xf; - /* we support handlers: - * 0x01: Classic Apple Mouse Protocol / 100 cpi operations - * 0x02: Classic Apple Mouse Protocol / 200 cpi operations - * we don't support handlers (at least): - * 0x03: Mouse systems A3 trackball - * 0x04: Extended Apple Mouse Protocol - * 0x2f: Microspeed mouse - * 0x42: Macally - * 0x5f: Microspeed mouse - * 0x66: Microspeed mouse - */ - if (buf[2] == 1 || buf[2] == 2) { - d->handler = buf[2]; + 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 + * we don't support handlers (at least): + * 0x03: Mouse systems A3 trackball + * 0x04: Extended Apple Mouse Protocol + * 0x2f: Microspeed mouse + * 0x42: Macally + * 0x5f: Microspeed mouse + * 0x66: Microspeed mouse + */ + if (buf[2] == 1 || buf[2] == 2) { + 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; } } |