diff options
| author | Terry Lambert <tlambert@chromium.org> | 2012-01-13 20:58:18 -0800 |
|---|---|---|
| committer | Stefan Reinauer <reinauer@chromium.org> | 2012-01-17 17:02:40 -0800 |
| commit | 3f68143724b1f6d94b4605faf514a5a0798b7d46 (patch) | |
| tree | 5f72a0bcfe63b92b554d9456e3c048994592c0d5 /include | |
| parent | 5ed4587d170920d7f1836baed6b8553735ebd5cf (diff) | |
Add generation of ANSI 3.64 escape sequences.
This adds support for generation of ANSI 3.64 escape sequences to the
PS/2 keyboard driver.
This change significantly refactors the code:
o It adds an FSA to support 0xE0 and 0xE1 multibyte PS/2
scan code sequences.
o It converts the PS/2 scan codes to USB scan code values
to facilitate sharing upper level code in future changes.
Reasons to use USB scan codes:
o Standard
o Simple conversion to ASCII / ANSI 3.64
o Ability to share complex processing / state code
o Shared international keymaps in higher level code
o It adds an ANSI 3.64 escape sequence generator for USB
special keys; the intent of doing this is to allow the
transparent use of PS/2, USB, and network or serial
devices using the same upper level u-boot clients.
o It adds an input FIFO which is an almost verbatim copy
of the Tegra matrix keyboard driver; future changes are
expected to share the FIFOcode among all keyboard drivers.
International keyboard support is expected to be handled at a higher
layer in the future, using a much smaller NRCS (National Replacement
Character Set) table instead of a duplicat table.
Combined, the changes reduce the overall source file size by about
5K, and removes about 4K from the data segment as well.
Note: Use of typedef for FSA states allows compiler to prohibit
switch statement without default case from omitting states.
BUG=chrome-os-partner:6580
TEST=Removed backslash from generated 3.64 sequences, stopped boot at
command line, verified character sequence generation.
Signed-off-by: tlambert@chromium.org
Change-Id: I00200c5ccefd44679335fb643b21794e5d77663a
modified: drivers/input/i8042.c
modified: include/i8042.h
Change-Id: I22c692f7bd65da5848908fc71c6cd7d04753f135
Reviewed-on: https://gerrit.chromium.org/gerrit/14218
Reviewed-by: Stefan Reinauer <reinauer@chromium.org>
Reviewed-by: Gabe Black (Do Not Use) <gabeblack@google.com>
Tested-by: Terry Lambert <tlambert@chromium.org>
Commit-Ready: Terry Lambert <tlambert@chromium.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/i8042.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/include/i8042.h b/include/i8042.h index 13952899ba..6f8e05af2c 100644 --- a/include/i8042.h +++ b/include/i8042.h @@ -39,6 +39,35 @@ #define I8042_STATUS_REG (CONFIG_SYS_ISA_IO + 0x0064) /* keyboard status read */ #define I8042_COMMAND_REG (CONFIG_SYS_ISA_IO + 0x0064) /* keyboard ctrl write */ +/* Status register bits */ +#define I8042_STR_PARITY 0x80 +#define I8042_STR_TIMEOUT 0x40 +#define I8042_STR_AUXDATA 0x20 +#define I8042_STR_KEYLOCK 0x10 +#define I8042_STR_CMDDAT 0x08 +#define I8042_STR_MUXERR 0x04 +#define I8042_STR_IBF 0x02 +#define I8042_STR_OBF 0x01 + +/* Command port commands (to i8042 controller) */ +#define I8042_CMD_SET_CMD_BYTE 0x60 +#define I8042_CMD_ENABLE_KBD 0xae + +/* Data port commands (to PS/2 device) */ +#define I8042_DATA_LED_WRITE 0xed +#define I8042_DATA_KBD_RESET 0xff + +/* LED bits */ +#define I8042_LED_SCROLL_LOCK 0x01 +#define I8042_LED_NUM_LOCK 0x02 +#define I8042_LED_CAPS_LOCK 0x04 +#define I8042_LED_MASK (I8042_LED_SCROLL_LOCK | \ + I8042_LED_NUM_LOCK | \ + I8042_LED_CAPS_LOCK) + + + + #define KBD_US 0 /* default US layout */ #define KBD_GER 1 /* german layout */ |