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1// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)2//3// This file is provided under a dual BSD/GPLv2 license. When using or4// redistributing this file, you may do so under either license.5//6// Copyright(c) 2022 Advanced Micro Devices, Inc. All rights reserved.7//8// Authors: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com>9 10/*11 * Generic PCI interface for ACP device12 */13 14#include <linux/delay.h>15#include <linux/interrupt.h>16#include <linux/pci.h>17#include <linux/platform_device.h>18#include <linux/module.h>19#include <linux/pm_runtime.h>20 21#include "amd.h"22#include "../mach-config.h"23 24#define DRV_NAME "acp_pci"25 26#define ACP3x_REG_START 0x124000027#define ACP3x_REG_END 0x125C00028 29static struct platform_device *dmic_dev;30static struct platform_device *pdev;31 32static const struct resource acp_res[] = {33 {34 .start = 0,35 .end = ACP3x_REG_END - ACP3x_REG_START,36 .name = "acp_mem",37 .flags = IORESOURCE_MEM,38 },39 {40 .start = 0,41 .end = 0,42 .name = "acp_dai_irq",43 .flags = IORESOURCE_IRQ,44 },45};46 47static int acp_pci_probe(struct pci_dev *pci, const struct pci_device_id *pci_id)48{49 struct platform_device_info pdevinfo;50 struct device *dev = &pci->dev;51 const struct resource *res_acp;52 struct acp_chip_info *chip;53 struct resource *res;54 unsigned int flag, addr, num_res, i;55 int ret;56 57 flag = snd_amd_acp_find_config(pci);58 if (flag != FLAG_AMD_LEGACY && flag != FLAG_AMD_LEGACY_ONLY_DMIC)59 return -ENODEV;60 61 chip = devm_kzalloc(&pci->dev, sizeof(*chip), GFP_KERNEL);62 if (!chip)63 return -ENOMEM;64 65 if (pci_enable_device(pci))66 return dev_err_probe(&pci->dev, -ENODEV,67 "pci_enable_device failed\n");68 69 ret = pci_request_regions(pci, "AMD ACP3x audio");70 if (ret < 0) {71 dev_err(&pci->dev, "pci_request_regions failed\n");72 ret = -ENOMEM;73 goto disable_pci;74 }75 76 pci_set_master(pci);77 78 res_acp = acp_res;79 num_res = ARRAY_SIZE(acp_res);80 81 switch (pci->revision) {82 case 0x01:83 chip->name = "acp_asoc_renoir";84 chip->acp_rev = ACP3X_DEV;85 break;86 case 0x6f:87 chip->name = "acp_asoc_rembrandt";88 chip->acp_rev = ACP6X_DEV;89 break;90 case 0x63:91 chip->name = "acp_asoc_acp63";92 chip->acp_rev = ACP63_DEV;93 break;94 case 0x70:95 chip->name = "acp_asoc_acp70";96 chip->acp_rev = ACP70_DEV;97 break;98 case 0x71:99 chip->name = "acp_asoc_acp70";100 chip->acp_rev = ACP71_DEV;101 break;102 default:103 dev_err(dev, "Unsupported device revision:0x%x\n", pci->revision);104 ret = -EINVAL;105 goto release_regions;106 }107 chip->flag = flag;108 dmic_dev = platform_device_register_data(dev, "dmic-codec", PLATFORM_DEVID_NONE, NULL, 0);109 if (IS_ERR(dmic_dev)) {110 dev_err(dev, "failed to create DMIC device\n");111 ret = PTR_ERR(dmic_dev);112 goto release_regions;113 }114 115 addr = pci_resource_start(pci, 0);116 chip->base = devm_ioremap(&pci->dev, addr, pci_resource_len(pci, 0));117 if (!chip->base) {118 ret = -ENOMEM;119 goto unregister_dmic_dev;120 }121 122 ret = acp_init(chip);123 if (ret)124 goto unregister_dmic_dev;125 126 check_acp_config(pci, chip);127 if (!chip->is_pdm_dev && !chip->is_i2s_config)128 goto skip_pdev_creation;129 130 res = devm_kcalloc(&pci->dev, num_res, sizeof(struct resource), GFP_KERNEL);131 if (!res) {132 ret = -ENOMEM;133 goto unregister_dmic_dev;134 }135 136 for (i = 0; i < num_res; i++, res_acp++) {137 res[i].name = res_acp->name;138 res[i].flags = res_acp->flags;139 res[i].start = addr + res_acp->start;140 res[i].end = addr + res_acp->end;141 if (res_acp->flags == IORESOURCE_IRQ) {142 res[i].start = pci->irq;143 res[i].end = res[i].start;144 }145 }146 147 memset(&pdevinfo, 0, sizeof(pdevinfo));148 149 pdevinfo.name = chip->name;150 pdevinfo.id = 0;151 pdevinfo.parent = &pci->dev;152 pdevinfo.num_res = num_res;153 pdevinfo.res = &res[0];154 pdevinfo.data = chip;155 pdevinfo.size_data = sizeof(*chip);156 157 pdev = platform_device_register_full(&pdevinfo);158 if (IS_ERR(pdev)) {159 dev_err(&pci->dev, "cannot register %s device\n", pdevinfo.name);160 ret = PTR_ERR(pdev);161 goto unregister_dmic_dev;162 }163 164skip_pdev_creation:165 chip->chip_pdev = pdev;166 dev_set_drvdata(&pci->dev, chip);167 pm_runtime_set_autosuspend_delay(&pci->dev, 2000);168 pm_runtime_use_autosuspend(&pci->dev);169 pm_runtime_put_noidle(&pci->dev);170 pm_runtime_allow(&pci->dev);171 return ret;172 173unregister_dmic_dev:174 platform_device_unregister(dmic_dev);175release_regions:176 pci_release_regions(pci);177disable_pci:178 pci_disable_device(pci);179 180 return ret;181};182 183static int __maybe_unused snd_acp_suspend(struct device *dev)184{185 struct acp_chip_info *chip;186 int ret;187 188 chip = dev_get_drvdata(dev);189 ret = acp_deinit(chip);190 if (ret)191 dev_err(dev, "ACP de-init failed\n");192 return ret;193}194 195static int __maybe_unused snd_acp_resume(struct device *dev)196{197 struct acp_chip_info *chip;198 struct acp_dev_data *adata;199 struct device child;200 int ret;201 202 chip = dev_get_drvdata(dev);203 ret = acp_init(chip);204 if (ret)205 dev_err(dev, "ACP init failed\n");206 if (chip->chip_pdev) {207 child = chip->chip_pdev->dev;208 adata = dev_get_drvdata(&child);209 if (adata)210 acp_enable_interrupts(adata);211 }212 return ret;213}214 215static const struct dev_pm_ops acp_pm_ops = {216 SET_RUNTIME_PM_OPS(snd_acp_suspend, snd_acp_resume, NULL)217 SET_SYSTEM_SLEEP_PM_OPS(snd_acp_suspend, snd_acp_resume)218};219 220static void acp_pci_remove(struct pci_dev *pci)221{222 struct acp_chip_info *chip;223 int ret;224 225 chip = pci_get_drvdata(pci);226 pm_runtime_forbid(&pci->dev);227 pm_runtime_get_noresume(&pci->dev);228 if (dmic_dev)229 platform_device_unregister(dmic_dev);230 if (pdev)231 platform_device_unregister(pdev);232 ret = acp_deinit(chip);233 if (ret)234 dev_err(&pci->dev, "ACP de-init failed\n");235}236 237/* PCI IDs */238static const struct pci_device_id acp_pci_ids[] = {239 { PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_PCI_DEV_ID)},240 { 0, }241};242MODULE_DEVICE_TABLE(pci, acp_pci_ids);243 244/* pci_driver definition */245static struct pci_driver snd_amd_acp_pci_driver = {246 .name = KBUILD_MODNAME,247 .id_table = acp_pci_ids,248 .probe = acp_pci_probe,249 .remove = acp_pci_remove,250 .driver = {251 .pm = &acp_pm_ops,252 },253};254module_pci_driver(snd_amd_acp_pci_driver);255 256MODULE_DESCRIPTION("AMD ACP common PCI support");257MODULE_LICENSE("Dual BSD/GPL");258MODULE_IMPORT_NS(SND_SOC_ACP_COMMON);259MODULE_ALIAS(DRV_NAME);260