max98390.c

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/* SPDX-License-Identifier: GPL-2.0-or-later */
 
#include <acpi/acpi_device.h>
#include <acpi/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(const 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 = NULL;
        uint64_t r0_value, temp_value;
        char dsm_name[80] = {};
 
        if (!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);
                        printk(BIOS_INFO, "set dsm_calib properties\n");
                }
        }
 
        if (CONFIG(CHROMEOS_DSM_PARAM_FILE_NAME)) {
                if (config->dsm_param_file_name) {
                        if (!dp)
                                dp = acpi_dp_new_table("_DSD");
 
                        size_t chars = snprintf(dsm_name, sizeof(dsm_name), "%s_%s_%s.bin",
                                        config->dsm_param_file_name, CONFIG_MAINBOARD_VENDOR,
                                        CONFIG_MAINBOARD_PART_NUMBER);
 
                        if (chars >= sizeof(dsm_name))
                                printk(BIOS_ERR, "String too long in %s\n", __func__);
 
                        acpi_dp_add_string(dp, "maxim,dsm_param_name", dsm_name);
                }
        }
 
        if (!dp)
                dp = acpi_dp_new_table("_DSD");
 
        acpi_dp_add_integer(dp, "maxim,vmon-slot-no", config->vmon_slot_no);
        acpi_dp_add_integer(dp, "maxim,imon-slot-no", config->imon_slot_no);
 
        if (dp)
                acpi_dp_write(dp);
 
        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 = 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
};