On Thu, Jun 2, 2011 at 2:19 PM, Ingo Molnar <mingo@xxxxxxx> wrote:
>
> ok, with the shared commands it place here's some
> feature-completeness comparison of the kernel driver and the
> emulator:
>
> guest driver i8042.h | hw/i8042.c emu
> /*
> * Status register bits
> */
> #define I8042_STR_PARITY 0x80 | missing
> #define I8042_STR_TIMEOUT 0x40 | missing
> #define I8042_STR_AUXDATA 0x20 | ok
> #define I8042_STR_KEYLOCK 0x10 | ok
> #define I8042_STR_CMDDAT 0x08 | ok
> #define I8042_STR_MUXERR 0x04 | ok
> #define I8042_STR_IBF 0x02 | missing
> #define I8042_STR_OBF 0x01 | ok
>
> The missing bits might be uninteresting, but wanted to map them out.
>
> There's more divergence for commands:
>
> guest driver i8042.h | hw/i8042.c emu
>
> /*
> * Standard commands.
> */
>
> #define I8042_CMD_CTL_RCTR 0x0120 != 0x20
> #define I8042_CMD_CTL_WCTR 0x1060 != 0x60
> #define I8042_CMD_CTL_TEST 0x01aa | missing
>
> #define I8042_CMD_KBD_DISABLE 0x00ad | missing
> #define I8042_CMD_KBD_ENABLE 0x00ae | missing
> #define I8042_CMD_KBD_TEST 0x01ab | missing
> #define I8042_CMD_KBD_LOOP 0x11d2 | missing
>
> #define I8042_CMD_AUX_DISABLE 0x00a7 | ok
> #define I8042_CMD_AUX_ENABLE 0x00a8 | ok
> #define I8042_CMD_AUX_TEST 0x01a9 | != 0xa9
> #define I8042_CMD_AUX_SEND 0x10d4 | != 0xd4
> #define I8042_CMD_AUX_LOOP 0x11d3 | != 0xd3
>
> #define I8042_CMD_MUX_PFX 0x0090 | missing
> #define I8042_CMD_MUX_SEND 0x1090 | missing
>
> Now the missing high word might just be some command symbol encoding
> difference, but it might be something more substantial as well.
The high byte is the data byte that's written immediately after the
command byte.
Pekka
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