cs42l42.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#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 CS42L42_ACPI_NAME       "CRUS"
#define CS42L42_ACPI_HID        "10134242"
 
static void cs42l42_fill_ssdt(const struct device *dev)
{
        struct drivers_i2c_cs42l42_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", CS42L42_ACPI_HID);
        acpigen_write_name_integer("_UID", 0);
        acpigen_write_name_string("_DDN", dev->chip_ops->name);
        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 cs42l42reset gpio */
        if (config->reset_gpio.pin_count)
                acpi_device_write_gpio(&config->reset_gpio);
 
        acpigen_write_resourcetemplate_footer();
 
        /* AAD 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,ts-inv", config->ts_inv ? 1 : 0);
        acpi_dp_add_integer(dsd, "cirrus,ts-dbnc-rise", config->ts_dbnc_rise);
        acpi_dp_add_integer(dsd, "cirrus,ts-dbnc-fall", config->ts_dbnc_fall);
        acpi_dp_add_integer(dsd, "cirrus,btn-det-init-dbnce", config->btn_det_init_dbnce);
 
        if (config->btn_det_init_dbnce > 200) {
                printk(BIOS_ERR, "%s: Incorrect btn_det_init_dbnce(%d). Using default of 100ms\n",
                                __func__, config->btn_det_init_dbnce);
                config->btn_det_init_dbnce = 100;
        }
 
        acpi_dp_add_integer(dsd, "cirrus,btn-det-event-dbnce", config->btn_det_event_dbnce);
 
        if (config->btn_det_event_dbnce > 100) {
                printk(BIOS_ERR, "%s: Incorrect btn_det_event_dbnce(%d). Using default of 10ms\n",
                                __func__, config->btn_det_event_dbnce);
                config->btn_det_event_dbnce = 10;
        }
 
        acpi_dp_add_integer_array(dsd, "cirrus,bias-lvls", config->bias_lvls, 4);
        acpi_dp_add_integer(dsd, "cirrus,hs-bias-ramp-rate", config->hs_bias_ramp_rate);
        if (config->hs_bias_sense_disable)
                acpi_dp_add_integer(dsd, "cirrus,hs-bias-sense-disable", 1);
 
        /* 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 *cs42l42_acpi_name(const struct device *dev)
{
        return CS42L42_ACPI_NAME;
}
 
static struct device_operations cs42l42_ops = {
        .read_resources         = noop_read_resources,
        .set_resources          = noop_set_resources,
        .acpi_name              = cs42l42_acpi_name,
        .acpi_fill_ssdt         = cs42l42_fill_ssdt,
};
 
static void cs42l42_enable(struct device *dev)
{
        dev->ops = &cs42l42_ops;
}
 
struct chip_operations drivers_i2c_cs42l42_ops = {
        CHIP_NAME("Cirrus Logic CS42l42 Audio Codec")
        .enable_dev = cs42l42_enable
};