56e448b8d5
This patch supports projects to use _DSM to control USB3 U1/U2 transition per port. More details can be found in https://web.archive.org/web/20230116084819/https://learn.microsoft.com/en-us/windows-hardware/drivers/bringup/usb-device-specific-method---dsm- The ACPI and USB driver of linux kernel need corresponding functions to support this feature. Please see https://git.kernel.org/pub/scm/linux/kernel/git/mnyman/xhci.git/log/?h=port_check_acpi_dsm BUG=b:253402457 TEST=tested on felwinter and found _DSM method is created. Change-Id: Iffb2498e26352a3f120c097c50587324e311e8ba Signed-off-by: Kane Chen <kane.chen@intel.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/71924 Reviewed-by: Kapil Porwal <kapilporwal@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#include <acpi/acpigen.h>
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#include <acpi/acpigen_dsm.h>
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/* ------------------- I2C HID DSM ---------------------------- */
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#define ACPI_DSM_I2C_HID_UUID "3CDFF6F7-4267-4555-AD05-B30A3D8938DE"
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/* I2C HID currently supports revision 1 only, for which, only 1 additional
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* function is supported. Thus, the query function should return 0x3:
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* bit 0 = additional function supported
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* bit 1 = function with index 1 supported
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* All other revisions do not support additional functions and hence return 0
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*/
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static void i2c_hid_func0_cb(void *arg)
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{
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/* ToInteger (Arg1, Local2) */
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acpigen_write_to_integer(ARG1_OP, LOCAL2_OP);
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/* If (LEqual (Local2, 0x1)) */
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acpigen_write_if_lequal_op_int(LOCAL2_OP, 0x1);
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/* Return (Buffer (One) { 0x3 }) */
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acpigen_write_return_singleton_buffer(0x3);
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/* Else */
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acpigen_write_else();
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/* Return (Buffer (One) { 0x0 }) */
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acpigen_write_return_singleton_buffer(0x0);
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acpigen_pop_len(); /* Pop : Else */
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}
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static void i2c_hid_func1_cb(void *arg)
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{
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struct dsm_i2c_hid_config *config = arg;
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acpigen_write_return_byte(config->hid_desc_reg_offset);
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}
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static void (*i2c_hid_callbacks[2])(void *) = {
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i2c_hid_func0_cb,
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i2c_hid_func1_cb,
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};
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void acpigen_write_dsm_i2c_hid(struct dsm_i2c_hid_config *config)
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{
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acpigen_write_dsm(ACPI_DSM_I2C_HID_UUID, i2c_hid_callbacks,
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ARRAY_SIZE(i2c_hid_callbacks), config);
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}
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/* ------------------- End: I2C HID DSM ------------------------- */
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#define USB_DSM_UUID "CE2EE385-00E6-48CB-9F05-2EDB927C4899"
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static void usb_dsm_func5_cb(void *arg)
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{
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struct dsm_usb_config *config = arg;
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acpigen_write_return_byte(config->usb_lpm_incapable);
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}
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static void (*usb_dsm_callbacks[6])(void *) = {
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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usb_dsm_func5_cb,
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};
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void acpigen_write_dsm_usb(struct dsm_usb_config *config)
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{
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acpigen_write_dsm(USB_DSM_UUID, usb_dsm_callbacks,
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ARRAY_SIZE(usb_dsm_callbacks), config);
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}
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