adb: change handler only when recognized

ADB devices must take new handler into account only when they recognize it.
This lets operating systems probe for valid/invalid handles, to know device capabilities.

Add a FIXME in keyboard handler, which should use a different translation
table depending of the selected handler.

Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
---
 hw/input/adb.c | 26 +++++++++++++++++++++++---
 1 file changed, 23 insertions(+), 3 deletions(-)

On Tue, Oct 25, 2016 at 09:01:01AM +0200, Hervé Poussineau wrote:
> ADB devices must take new handler into account only when they recognize it.
> This lets operating systems probe for valid/invalid handles, to know device capabilities.
> 
> Add a FIXME in keyboard handler, which should use a different translation
> table depending of the selected handler.
> 
> Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>

Applied to ppc-for-2.8, thanks.

> ---
>  hw/input/adb.c | 26 +++++++++++++++++++++++---
>  1 file changed, 23 insertions(+), 3 deletions(-)
> 
> diff --git a/hw/input/adb.c b/hw/input/adb.c
> index 3d39368..43d3205 100644
> --- a/hw/input/adb.c
> +++ b/hw/input/adb.c
> @@ -396,9 +396,15 @@ static int adb_kbd_request(ADBDevice *d, uint8_t *obuf,
>                  d->devaddr = buf[1] & 0xf;
>                  break;
>              default:
> -                /* XXX: check this */
>                  d->devaddr = buf[1] & 0xf;
> -                d->handler = buf[2];
> +                /* we support handlers:
> +                 * 1: Apple Standard Keyboard
> +                 * 2: Apple Extended Keyboard (LShift = RShift)
> +                 * 3: Apple Extended Keyboard (LShift != RShift)
> +                 */
> +                if (buf[2] == 1 || buf[2] == 2 || buf[2] == 3) {
> +                    d->handler = buf[2];
> +                }
>                  break;
>              }
>          }
> @@ -437,6 +443,7 @@ static void adb_keyboard_event(DeviceState *dev, QemuConsole *src,
>      if (qcode >= ARRAY_SIZE(qcode_to_adb_keycode)) {
>          return;
>      }
> +    /* FIXME: take handler into account when translating qcode */
>      keycode = qcode_to_adb_keycode[qcode];
>      if (keycode == NO_KEY) {  /* We don't want to send this to the guest */
>          ADB_DPRINTF("Ignoring NO_KEY\n");
> @@ -631,8 +638,21 @@ static int adb_mouse_request(ADBDevice *d, uint8_t *obuf,
>                  d->devaddr = buf[1] & 0xf;
>                  break;
>              default:
> -                /* XXX: check this */
>                  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];
> +                }
>                  break;
>              }
>          }