cs35l53.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <acpi/acpi.h>
#include <acpi/acpi_device.h>
#include <acpi/acpigen.h>
#include <console/console.h>
#include <device/i2c_simple.h>
#include <device/device.h>
#include <device/path.h>
 
#include "chip.h"
 
#define CS35L53_ACPI_HID        "CSC3541"
 
static void cs35l53_fill_ssdt(const struct device *dev)
{
        struct drivers_i2c_cs35l53_config *config = dev->chip_info;
        const char *scope = acpi_device_scope(dev);
        const char *path = acpi_device_path(dev);
        struct acpi_i2c i2c = {
                .address = dev->path.i2c.device,
                .mode_10bit = dev->path.i2c.mode_10bit,
                .speed = config->bus_speed ? : I2C_SPEED_FAST,
                .resource = scope,
        };
        struct acpi_dp *dsd;
        int gpio_index = 0;
 
        if (!scope)
                return;
 
        /* Device */
        acpigen_write_scope(scope);
        acpigen_write_device(acpi_device_name(dev));
        acpigen_write_name_string("_HID", CS35L53_ACPI_HID);
        acpigen_write_name_integer("_UID", 0);
        acpigen_write_name_string("_DDN", dev->chip_ops->name);
        acpigen_write_name_string("_SUB", config->sub);
        acpigen_write_STA(acpi_device_status(dev));
 
        /* Resources */
        acpigen_write_name("_CRS");
        acpigen_write_resourcetemplate_header();
        acpi_device_write_i2c(&i2c);
        /* Use either Interrupt() or GpioInt() */
        if (config->irq_gpio.pin_count)
                acpi_device_write_gpio(&config->irq_gpio);
        else
                acpi_device_write_interrupt(&config->irq);
 
        /* for cs35l53 reset gpio */
        if (config->reset_gpio.pin_count)
                acpi_device_write_gpio(&config->reset_gpio);
 
        acpigen_write_resourcetemplate_footer();
 
        /* Add Child Device Properties */
        dsd = acpi_dp_new_table("_DSD");
        if (config->irq_gpio.pin_count)
                acpi_dp_add_gpio(dsd, "irq-gpios", path,
                         gpio_index++,  /* Index = 0 */
                         0,  /* Pin = 0 (There is a single pin in the GPIO resource). */
                         config->irq_gpio.active_low);
        if (config->reset_gpio.pin_count)
                acpi_dp_add_gpio(dsd, "reset-gpios", path,
                         gpio_index++,  /* Index = 0 or 1 (if irq gpio is written). */
                         0,  /* Pin = 0 (There is a single pin in the GPIO resource). */
                         config->reset_gpio.active_low);
 
        acpi_dp_add_integer(dsd, "cirrus,boost-type", config->boost_type);
 
        switch (config->boost_type) {
        case INTERNAL_BOOST:
                if ((config->boost_peak_milliamp > 4500) ||
                (config->boost_peak_milliamp < 1600) ||
                (config->boost_peak_milliamp % 50)) {
                        printk(BIOS_ERR,
                               "%s: Incorrect boost_peak_milliamp(%d). Using default of 4500 mA\n",
                                __func__, config->boost_peak_milliamp);
                        config->boost_peak_milliamp = 4500;
                }
                acpi_dp_add_integer(dsd, "cirrus,boost-peak-milliamp",
                                    config->boost_peak_milliamp);
                acpi_dp_add_integer(dsd, "cirrus,boost-ind-nanohenry",
                                    config->boost_ind_nanohenry);
                acpi_dp_add_integer(dsd, "cirrus,boost-cap-microfarad",
                                    config->boost_cap_microfarad);
                break;
        case EXTERNAL_BOOST:
                config->gpio1_output_enable = true;
                config->gpio1_src_select = GPIO1_SRC_GPIO;
                break;
        default:
                break;
        }
 
        acpi_dp_add_integer(dsd, "cirrus,asp-sdout-hiz", config->asp_sdout_hiz);
        acpi_dp_add_integer(dsd, "cirrus,gpio1-polarity-invert",
                                config->gpio1_polarity_invert);
        acpi_dp_add_integer(dsd, "cirrus,gpio1-output-enable",
                                config->gpio1_output_enable);
        acpi_dp_add_integer(dsd, "cirrus,gpio1-src-select", config->gpio1_src_select);
        acpi_dp_add_integer(dsd, "cirrus,gpio2-polarity-invert",
                                config->gpio2_polarity_invert);
        acpi_dp_add_integer(dsd, "cirrus,gpio2-output-enable",
                                config->gpio2_output_enable);
        acpi_dp_add_integer(dsd, "cirrus,gpio2-src-select", config->gpio2_src_select);
 
        /* Write Device Property Hierarchy */
        acpi_dp_write(dsd);
 
        acpigen_pop_len(); /* Device */
        acpigen_pop_len(); /* Scope */
 
        printk(BIOS_INFO, "%s: %s address 0%xh irq %d\n",
               acpi_device_path(dev), dev->chip_ops->name,
               dev->path.i2c.device, config->irq.pin);
}
 
static const char *cs35l53_acpi_name(const struct device *dev)
{
        struct drivers_i2c_cs35l53_config *config = dev->chip_info;
        static char name[ACPI_NAME_BUFFER_SIZE];
 
        if (config->name)
                return config->name;
 
        snprintf(name, sizeof(name), "D%03.3X", dev->path.i2c.device);
        return name;
}
 
static struct device_operations cs35l53_ops = {
        .read_resources         = noop_read_resources,
        .set_resources          = noop_set_resources,
        .acpi_name              = cs35l53_acpi_name,
        .acpi_fill_ssdt         = cs35l53_fill_ssdt,
};
 
static void cs35l53_enable(struct device *dev)
{
        dev->ops = &cs35l53_ops;
}
 
struct chip_operations drivers_i2c_cs35l53_ops = {
        CHIP_NAME("Cirrus Logic CS35L53 Audio Codec")
        .enable_dev = cs35l53_enable
};