diff options
Diffstat (limited to 'src/ec/google/chromeec/i2c_tunnel/i2c_tunnel.c')
-rw-r--r-- | src/ec/google/chromeec/i2c_tunnel/i2c_tunnel.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/src/ec/google/chromeec/i2c_tunnel/i2c_tunnel.c b/src/ec/google/chromeec/i2c_tunnel/i2c_tunnel.c new file mode 100644 index 0000000000..51375f8f22 --- /dev/null +++ b/src/ec/google/chromeec/i2c_tunnel/i2c_tunnel.c @@ -0,0 +1,71 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* This file is part of the coreboot project. */ + +#include <arch/acpi_device.h> +#include <arch/acpigen.h> +#include <console/console.h> +#include <device/device.h> +#include <device/path.h> +#include <string.h> +#include "chip.h" + +#define CROS_EC_I2C_TUNNEL_HID "GOOG0012" +#define CROS_EC_I2C_TUNNEL_DDN "Cros EC I2C Tunnel" + +static void crosec_i2c_tunnel_fill_ssdt(struct device *dev) +{ + const char *scope = acpi_device_scope(dev); + struct ec_google_chromeec_i2c_tunnel_config *cfg = dev->chip_info; + struct acpi_dp *dsd; + + if (!dev->enabled || !scope || !cfg) + return; + + acpigen_write_scope(scope); + + acpigen_write_device(acpi_device_name(dev)); + acpigen_write_name_string("_HID", CROS_EC_I2C_TUNNEL_HID); + acpigen_write_name_integer("_UID", cfg->uid); + acpigen_write_name_string("_DDN", CROS_EC_I2C_TUNNEL_DDN); + acpigen_write_STA(acpi_device_status(dev)); + + dsd = acpi_dp_new_table("_DSD"); + acpi_dp_add_integer(dsd, "google,remote-bus", cfg->remote_bus); + acpi_dp_write(dsd); + + acpigen_pop_len(); /* Device */ + acpigen_pop_len(); /* Scope */ + + printk(BIOS_INFO, "%s: %s at %s\n", acpi_device_path(dev), CROS_EC_I2C_TUNNEL_DDN, + dev_path(dev)); +} + +static const char *crosec_i2c_tunnel_acpi_name(const struct device *dev) +{ + struct ec_google_chromeec_i2c_tunnel_config *cfg = dev->chip_info; + static char name[5]; + + if (cfg->name) + return cfg->name; + + snprintf(name, sizeof(name), "TUN%X", dev->path.generic.id); + return name; +} + +static struct device_operations crosec_i2c_tunnel_ops = { + .read_resources = noop_read_resources, + .set_resources = noop_set_resources, + .acpi_name = crosec_i2c_tunnel_acpi_name, + .acpi_fill_ssdt = crosec_i2c_tunnel_fill_ssdt, + .scan_bus = scan_static_bus, +}; + +static void crosec_i2c_tunnel_enable(struct device *dev) +{ + dev->ops = &crosec_i2c_tunnel_ops; +} + +struct chip_operations ec_google_chromeec_i2c_tunnel_ops = { + CHIP_NAME("CrosEC I2C Tunnel Device") + .enable_dev = crosec_i2c_tunnel_enable +}; |