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GMMOS: I2C keyboards, and every keyboard at once

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The second micro driver: i2c_hid.c with everything but reading a
keyboard's input reports taken out. No ACPI -- AML cannot run on a dead
kernel -- so the live driver hands over what it found at boot
(i2c_hid_keyboards): the DesignWare controller, the address, the report
size, the AMD GPIO pin if there is one, and the parsed report descriptor.
No power commands, no reset, a read-only transfer.

usb_hid.c's report-protocol rewrite is split out as hid_boot_report(),
which does nothing but rewrite, and kernel/gmmos/hidkeys.c turns boot
reports into keys for this and the USB micro drivers to come.

GMMOS now probes every micro driver and polls all that answer.

Not run: QEMU has no DesignWare I2C, and the laptops at hand have PS/2
keyboards.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01S1giNvrHTrPMPw7V6x1kQ4
This commit is contained in:
Nexoniarz 2026-10-25 01:15:50 +02:00
commit c6d90e69fa
8 changed files with 387 additions and 17 deletions
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2
Makefile
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@ -116,7 +116,7 @@ KERN_ZSTD = $(addprefix $(BUILD)/zstd/, \
KERN_ZSTD += $(BUILD)/kernel/scff/scff.o
# GMMOS, what runs after a panic, and its micro drivers. See include/gmmos/gmmos.h.
KERN_GMMOS = $(addprefix $(BUILD)/kernel/gmmos/, gmmos.o ps2.o)
KERN_GMMOS = $(addprefix $(BUILD)/kernel/gmmos/, gmmos.o hidkeys.o ps2.o i2c.o)
KERN_PROC = $(addprefix $(BUILD)/kernel/proc/, \
proc.o)