Embedded Controller chip could commonly be found at platforms for laptop, it generally does power management, keyboard and mouse simulation, ACPI defined operation, low-speed devices handling ... It talks with OS via io-port 0x60/0x54, 0x62/0x66, the first pair is for i8042 compatible, the last pair is for ACPI functions. As QEMU has done power management, i8042 emulation, this RFC patch will only focus on ACPI functions. you can find standard description a ACPI SPEC "ACPI Embedded Controller Interface Specification"
HECI ? http://en.wikipedia.org/wiki/Host_Embedded_Controller_Interface
On Wed, Apr 17, 2013 at 9:32 AM, li guang lig.fnst@cn.fujitsu.com wrote:
Embedded Controller chip could commonly be found at platforms for laptop, it generally does power management, keyboard and mouse simulation, ACPI defined operation, low-speed devices handling ... It talks with OS via io-port 0x60/0x54, 0x62/0x66, the first pair is for i8042 compatible, the last pair is for ACPI functions. As QEMU has done power management, i8042 emulation, this RFC patch will only focus on ACPI functions. you can find standard description a ACPI SPEC "ACPI Embedded Controller Interface Specification"
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Fred . -
li guang