411364564a
This driver uses the ACPI Device Property interface to generate the required parameters into the _DSD table format expected by the kernel This was tested on the octopus/variants/fleex ainboard to ensure that the SSDT contained the equivalent parameters that are provided by the current DSDT object Signed-off-by: Vitaly Rodionov <vitaly.rodionov@cirrus.corp-partner.google.com> Change-Id: I7c3145b20a1ba743d91eb64b93cb001db3854c5d Reviewed-on: https://review.coreboot.org/c/coreboot/+/52395 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: EricR Lai <ericr_lai@compal.corp-partner.google.com> Reviewed-by: Furquan Shaikh <furquan@google.com>
123 lines
3.7 KiB
C
123 lines
3.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#include <acpi/acpi.h>
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#include <acpi/acpi_device.h>
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#include <acpi/acpigen.h>
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#include <console/console.h>
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#include <device/i2c_simple.h>
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#include <device/device.h>
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#include <device/path.h>
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#include "chip.h"
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#define CS42L42_ACPI_NAME "CRUS"
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#define CS42L42_ACPI_HID "10134242"
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static void cs42l42_fill_ssdt(const struct device *dev)
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{
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struct drivers_i2c_cs42l42_config *config = dev->chip_info;
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const char *scope = acpi_device_scope(dev);
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const char *path = acpi_device_path(dev);
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struct acpi_i2c i2c = {
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.address = dev->path.i2c.device,
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.mode_10bit = dev->path.i2c.mode_10bit,
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.speed = config->bus_speed ? : I2C_SPEED_FAST,
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.resource = scope,
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};
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struct acpi_dp *dsd;
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int gpio_index = 0;
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if (!scope)
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return;
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/* Device */
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acpigen_write_scope(scope);
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acpigen_write_device(acpi_device_name(dev));
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acpigen_write_name_string("_HID", CS42L42_ACPI_HID);
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acpigen_write_name_integer("_UID", 0);
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acpigen_write_name_string("_DDN", dev->chip_ops->name);
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acpigen_write_STA(acpi_device_status(dev));
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/* Resources */
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acpigen_write_name("_CRS");
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acpigen_write_resourcetemplate_header();
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acpi_device_write_i2c(&i2c);
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/* Use either Interrupt() or GpioInt() */
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if (config->irq_gpio.pin_count)
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acpi_device_write_gpio(&config->irq_gpio);
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else
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acpi_device_write_interrupt(&config->irq);
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/* for cs42l42reset gpio */
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if (config->reset_gpio.pin_count)
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acpi_device_write_gpio(&config->reset_gpio);
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acpigen_write_resourcetemplate_footer();
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/* AAD Child Device Properties */
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dsd = acpi_dp_new_table("_DSD");
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if (config->irq_gpio.pin_count)
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acpi_dp_add_gpio(dsd, "irq-gpios", path,
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gpio_index++, /* Index = 0 */
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0, /* Pin = 0 (There is a single pin in the GPIO resource). */
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config->irq_gpio.active_low);
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if (config->reset_gpio.pin_count)
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acpi_dp_add_gpio(dsd, "reset-gpios", path,
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gpio_index++, /* Index = 0 or 1 (if irq gpio is written). */
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0, /* Pin = 0 (There is a single pin in the GPIO resource). */
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config->reset_gpio.active_low);
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acpi_dp_add_integer(dsd, "cirrus,ts-inv", config->ts_inv ? 1 : 0);
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acpi_dp_add_integer(dsd, "cirrus,ts-dbnc-rise", config->ts_dbnc_rise);
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acpi_dp_add_integer(dsd, "cirrus,ts-dbnc-fall", config->ts_dbnc_fall);
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acpi_dp_add_integer(dsd, "cirrus,btn-det-init-dbnce", config->btn_det_init_dbnce);
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if (config->btn_det_init_dbnce > 200) {
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printk(BIOS_ERR, "%s: Incorrect btn_det_init_dbnce(%d). Using default of 100ms\n",
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__func__, config->btn_det_init_dbnce);
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config->btn_det_init_dbnce = 100;
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}
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acpi_dp_add_integer(dsd, "cirrus,btn-det-event-dbnce", config->btn_det_event_dbnce);
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if (config->btn_det_event_dbnce > 100) {
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printk(BIOS_ERR, "%s: Incorrect btn_det_event_dbnce(%d). Using default of 10ms\n",
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__func__, config->btn_det_event_dbnce);
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config->btn_det_event_dbnce = 10;
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}
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acpi_dp_add_integer_array(dsd, "cirrus,bias-lvls", config->bias_lvls, 4);
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acpi_dp_add_integer(dsd, "cirrus,hs-bias-ramp-rate", config->hs_bias_ramp_rate);
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/* Write Device Property Hierarchy */
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acpi_dp_write(dsd);
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acpigen_pop_len(); /* Device */
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acpigen_pop_len(); /* Scope */
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printk(BIOS_INFO, "%s: %s address 0%xh irq %d\n",
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acpi_device_path(dev), dev->chip_ops->name,
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dev->path.i2c.device, config->irq.pin);
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}
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static const char *cs42l42_acpi_name(const struct device *dev)
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{
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return CS42L42_ACPI_NAME;
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}
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static struct device_operations cs42l42_ops = {
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.read_resources = noop_read_resources,
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.set_resources = noop_set_resources,
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.acpi_name = cs42l42_acpi_name,
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.acpi_fill_ssdt = cs42l42_fill_ssdt,
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};
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static void cs42l42_enable(struct device *dev)
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{
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dev->ops = &cs42l42_ops;
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}
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struct chip_operations drivers_i2c_cs42l42_ops = {
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CHIP_NAME("Cirrus Logic CS42l42 Audio Codec")
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.enable_dev = cs42l42_enable
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};
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