c6d90e69fa
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
24 lines
1.1 KiB
C
24 lines
1.1 KiB
C
#pragma once
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#include "core/types.h"
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// HID over transports other than USB. The report parser and the keyboard and
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// pointer paths are kernel/drivers/usb/hid/usb_hid.c's; a transport hands
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// over the report descriptor once and every input report after it.
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// The device described by `desc`, or 0 if it is neither a keyboard nor a
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// pointer. `what` names it in the log.
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void *hid_attach(const uchar *desc, int n, const char *what);
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// One input report, report ID included when the device uses them.
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void hid_attached_input(void *h, const uchar *rep, int len);
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// For GMMOS, after a panic: whether a device is a keyboard, and one of its
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// reports rewritten into the 8-byte boot layout (modifiers, reserved, six
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// usages) with nothing else done -- no queue, no lock, no events. 0 when the
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// report was not a keyboard's.
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int hid_is_keyboard(void *h);
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int hid_boot_report(void *h, const uchar *rep, int len, uchar *boot);
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// I2C-HID: the touchpads (and some keyboards) of laptops. Started once ACPI
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// and kernel threads are up; see kernel/drivers/i2c/i2c_hid.c.
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void i2c_hid_start(void);
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