4979d7610e
Maxim 98927 kernel driver requires entries in the ACPI SSDT table, add a SSDT generator as part of this driver. BUG=chrome-os-partner:62051 BRANCH=None TEST=After boot, dump and verify that the generated SSDT ACPI table has the required entries. Change-Id: Ic2d4d8449288bc00d085852220b2e1e7a208e9ef Signed-off-by: Naresh G Solanki <naresh.solanki@intel.com> Signed-off-by: Rizwan Qureshi <rizwan.qureshi@intel.com> Signed-off-by: M Naveen <naveen.m@intel.com> Signed-off-by: Dylan Reid <dgreid@chromium.org> Reviewed-on: https://review.coreboot.org/18211 Tested-by: build bot (Jenkins) Reviewed-by: Furquan Shaikh <furquan@google.com>
101 lines
2.7 KiB
C
101 lines
2.7 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright 2017 Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <arch/acpi.h>
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#include <arch/acpi_device.h>
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#include <arch/acpigen.h>
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#include <console/console.h>
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#include <device/i2c.h>
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#include <device/device.h>
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#include <device/path.h>
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#include <stdint.h>
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#include <string.h>
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#include "chip.h"
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#define MAX98927_ACPI_NAME "MAXI"
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#define MAX98927_ACPI_HID "MX98927"
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static void max98927_fill_ssdt(struct device *dev)
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{
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struct drivers_i2c_max98927_config *config = dev->chip_info;
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const char *scope = acpi_device_scope(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 *dp;
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if (!dev->enabled || !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", MAX98927_ACPI_HID);
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acpigen_write_name_integer("_UID", config->uid);
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if (config->desc)
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acpigen_write_name_string("_DDN", config->desc);
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acpigen_write_STA(ACPI_STATUS_DEVICE_ALL_ON);
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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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acpigen_write_resourcetemplate_footer();
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/* Device Properties */
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dp = acpi_dp_new_table("_DSD");
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acpi_dp_add_integer(dp, "interleave_mode", config->interleave_mode);
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acpi_dp_write(dp);
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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\n", acpi_device_path(dev),
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dev->chip_ops->name, dev->path.i2c.device);
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}
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static const char *max98927_acpi_name(struct device *dev)
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{
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struct drivers_i2c_max98927_config *config = dev->chip_info;
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if (config->name)
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return config->name;
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return MAX98927_ACPI_NAME;
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}
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static struct device_operations max98927_ops = {
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.read_resources = DEVICE_NOOP,
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.set_resources = DEVICE_NOOP,
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.enable_resources = DEVICE_NOOP,
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.acpi_name = &max98927_acpi_name,
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.acpi_fill_ssdt_generator = &max98927_fill_ssdt,
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};
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static void max98927_enable(struct device *dev)
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{
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dev->ops = &max98927_ops;
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}
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struct chip_operations drivers_i2c_max98927_ops = {
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CHIP_NAME("Maxim MAX98927 Codec")
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.enable_dev = &max98927_enable
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};
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