diff options
| -rw-r--r-- | src/drivers/i2c/max98390/Kconfig | 4 | ||||
| -rw-r--r-- | src/drivers/i2c/max98390/Makefile.inc | 1 | ||||
| -rw-r--r-- | src/drivers/i2c/max98390/chip.h | 17 | ||||
| -rw-r--r-- | src/drivers/i2c/max98390/max98390.c | 110 |
4 files changed, 132 insertions, 0 deletions
diff --git a/src/drivers/i2c/max98390/Kconfig b/src/drivers/i2c/max98390/Kconfig new file mode 100644 index 0000000000..7ea5589e9a --- /dev/null +++ b/src/drivers/i2c/max98390/Kconfig @@ -0,0 +1,4 @@ +config DRIVERS_I2C_MAX98390 + bool + default n + depends on HAVE_ACPI_TABLES diff --git a/src/drivers/i2c/max98390/Makefile.inc b/src/drivers/i2c/max98390/Makefile.inc new file mode 100644 index 0000000000..09ef81b9ea --- /dev/null +++ b/src/drivers/i2c/max98390/Makefile.inc @@ -0,0 +1 @@ +ramstage-$(CONFIG_DRIVERS_I2C_MAX98390) += max98390.c diff --git a/src/drivers/i2c/max98390/chip.h b/src/drivers/i2c/max98390/chip.h new file mode 100644 index 0000000000..26cad4c728 --- /dev/null +++ b/src/drivers/i2c/max98390/chip.h @@ -0,0 +1,17 @@ +/* This file is part of the coreboot project. */ +/* SPDX-License-Identifier: GPL-2.0-or-later */ + +/* + * MAXIM MAX98390 audio codec devicetree bindings + */ + +struct drivers_i2c_max98390_config { + const char *name; /* ACPI Device Name */ + const char *desc; /* Device Description */ + unsigned int uid; /* ACPI _UID */ + + /* The VPD key of calibrated speaker resistance. */ + const char *r0_calib_key; + /* The VPD key of temperature during speaker calibration. */ + const char *temperature_calib_key; +}; diff --git a/src/drivers/i2c/max98390/max98390.c b/src/drivers/i2c/max98390/max98390.c new file mode 100644 index 0000000000..d2bb14fc8b --- /dev/null +++ b/src/drivers/i2c/max98390/max98390.c @@ -0,0 +1,110 @@ +/* This file is part of the coreboot project. */ +/* SPDX-License-Identifier: GPL-2.0-or-later */ + +#include <arch/acpi.h> +#include <arch/acpi_device.h> +#include <arch/acpigen.h> +#include <console/console.h> +#include <device/i2c.h> +#include <device/device.h> +#include <device/path.h> +#include <stdint.h> +#include <vendorcode/google/chromeos/chromeos.h> +#include "chip.h" + +#define MAX98390_ACPI_HID "MX98390" + +#define MAX98390_DP_INT(key, val) acpi_dp_add_integer(dp, "maxim," key, (val)) + +static void max98390_fill_ssdt(struct device *dev) +{ + struct drivers_i2c_max98390_config *config = dev->chip_info; + const char *scope = acpi_device_scope(dev); + struct acpi_i2c i2c = { + .address = dev->path.i2c.device, + .mode_10bit = dev->path.i2c.mode_10bit, + .speed = I2C_SPEED_FAST, + .resource = scope, + }; + struct acpi_dp *dp; + uint64_t r0_value, temp_value; + + if (!dev->enabled || !scope) + return; + + /* Device */ + acpigen_write_scope(scope); + acpigen_write_device(acpi_device_name(dev)); + acpigen_write_name_string("_HID", MAX98390_ACPI_HID); + acpigen_write_name_integer("_UID", config->uid); + acpigen_write_name_string("_DDN", config->desc); + acpigen_write_STA(acpi_device_status(dev)); + + /* Resources */ + acpigen_write_name("_CRS"); + acpigen_write_resourcetemplate_header(); + acpi_device_write_i2c(&i2c); + acpigen_write_resourcetemplate_footer(); + + /* Device Properties */ + if (CONFIG(CHROMEOS_DSM_CALIB)) { + if (get_dsm_calibration_from_key(config->r0_calib_key, &r0_value) + || get_dsm_calibration_from_key(config->temperature_calib_key, + &temp_value)) { + printk(BIOS_ERR, + "Failed to get dsm_calib parameters from VPD" + " with key %s and %s\n", + config->r0_calib_key, config->temperature_calib_key); + } else { + dp = acpi_dp_new_table("_DSD"); + MAX98390_DP_INT("r0_calib", r0_value); + MAX98390_DP_INT("temperature_calib", temp_value); + acpi_dp_write(dp); + printk(BIOS_INFO, "set dsm_calib properties\n"); + } + } + + acpigen_pop_len(); /* Device */ + acpigen_pop_len(); /* Scope */ + + printk(BIOS_INFO, "%s: %s address 0%xh\n", acpi_device_path(dev), dev->chip_ops->name, + dev->path.i2c.device); +} + +static const char *max98390_acpi_name(const struct device *dev) +{ + struct drivers_i2c_max98390_config *config = dev->chip_info; + static char name[5]; + + if (config->name) + return config->name; + + snprintf(name, sizeof(name), "D%03.3X", dev->path.i2c.device); + return name; +} + +static struct device_operations max98390_ops = { + .read_resources = noop_read_resources, + .set_resources = noop_set_resources, + .acpi_name = max98390_acpi_name, + .acpi_fill_ssdt_generator = max98390_fill_ssdt, +}; + +static void max98390_enable(struct device *dev) +{ + struct drivers_i2c_max98390_config *config = dev->chip_info; + + if (!config) + return; + + dev->ops = &max98390_ops; + + /* Name the device as per description provided in devicetree */ + if (config->desc) + dev->name = config->desc; +} + +struct chip_operations drivers_i2c_max98390_ops = { + CHIP_NAME("Maxim MAX98390 Codec") + .enable_dev = max98390_enable +}; |