diff options
Diffstat (limited to 'src/acpi/acpigen_dsm.c')
| -rw-r--r-- | src/acpi/acpigen_dsm.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/src/acpi/acpigen_dsm.c b/src/acpi/acpigen_dsm.c new file mode 100644 index 0000000000..ecac3fefb8 --- /dev/null +++ b/src/acpi/acpigen_dsm.c @@ -0,0 +1,52 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* This file is part of the coreboot project. */ + +#include <arch/acpigen.h> +#include <arch/acpigen_dsm.h> + +/* ------------------- I2C HID DSM ---------------------------- */ + +#define ACPI_DSM_I2C_HID_UUID "3CDFF6F7-4267-4555-AD05-B30A3D8938DE" + +static void i2c_hid_func0_cb(void *arg) +{ + /* ToInteger (Arg1, Local2) */ + acpigen_write_to_integer(ARG1_OP, LOCAL2_OP); + /* If (LEqual (Local2, 0x0)) */ + acpigen_write_if_lequal_op_int(LOCAL2_OP, 0x0); + /* Return (Buffer (One) { 0x1f }) */ + acpigen_write_return_singleton_buffer(0x1f); + acpigen_pop_len(); /* Pop : If */ + /* Else */ + acpigen_write_else(); + /* If (LEqual (Local2, 0x1)) */ + acpigen_write_if_lequal_op_int(LOCAL2_OP, 0x1); + /* Return (Buffer (One) { 0x3f }) */ + acpigen_write_return_singleton_buffer(0x3f); + acpigen_pop_len(); /* Pop : If */ + /* Else */ + acpigen_write_else(); + /* Return (Buffer (One) { 0x0 }) */ + acpigen_write_return_singleton_buffer(0x0); + acpigen_pop_len(); /* Pop : Else */ + acpigen_pop_len(); /* Pop : Else */ +} + +static void i2c_hid_func1_cb(void *arg) +{ + struct dsm_i2c_hid_config *config = arg; + acpigen_write_return_byte(config->hid_desc_reg_offset); +} + +static void (*i2c_hid_callbacks[2])(void *) = { + i2c_hid_func0_cb, + i2c_hid_func1_cb, +}; + +void acpigen_write_dsm_i2c_hid(struct dsm_i2c_hid_config *config) +{ + acpigen_write_dsm(ACPI_DSM_I2C_HID_UUID, i2c_hid_callbacks, + ARRAY_SIZE(i2c_hid_callbacks), config); +} + +/* ------------------- End: I2C HID DSM ------------------------- */ |