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 or 4// 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 device 12 */ 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 0x1240000 27#define ACP3x_REG_END 0x125C000 28 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) 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 default: 91 dev_err(dev, "Unsupported device revision:0x%x\n", pci->revision); 92 ret = -EINVAL; 93 goto release_regions; 94 } 95 96 dmic_dev = platform_device_register_data(dev, "dmic-codec", PLATFORM_DEVID_NONE, NULL, 0); 97 if (IS_ERR(dmic_dev)) { 98 dev_err(dev, "failed to create DMIC device\n"); 99 ret = PTR_ERR(dmic_dev); 100 goto release_regions; 101 } 102 103 addr = pci_resource_start(pci, 0); 104 chip->base = devm_ioremap(&pci->dev, addr, pci_resource_len(pci, 0)); 105 if (!chip->base) { 106 ret = -ENOMEM; 107 goto unregister_dmic_dev; 108 } 109 110 acp_init(chip); 111 res = devm_kcalloc(&pci->dev, num_res, sizeof(struct resource), GFP_KERNEL); 112 if (!res) { 113 ret = -ENOMEM; 114 goto unregister_dmic_dev; 115 } 116 117 for (i = 0; i < num_res; i++, res_acp++) { 118 res[i].name = res_acp->name; 119 res[i].flags = res_acp->flags; 120 res[i].start = addr + res_acp->start; 121 res[i].end = addr + res_acp->end; 122 if (res_acp->flags == IORESOURCE_IRQ) { 123 res[i].start = pci->irq; 124 res[i].end = res[i].start; 125 } 126 } 127 128 memset(&pdevinfo, 0, sizeof(pdevinfo)); 129 130 pdevinfo.name = chip->name; 131 pdevinfo.id = 0; 132 pdevinfo.parent = &pci->dev; 133 pdevinfo.num_res = num_res; 134 pdevinfo.res = &res[0]; 135 pdevinfo.data = chip; 136 pdevinfo.size_data = sizeof(*chip); 137 138 pdev = platform_device_register_full(&pdevinfo); 139 if (IS_ERR(pdev)) { 140 dev_err(&pci->dev, "cannot register %s device\n", pdevinfo.name); 141 ret = PTR_ERR(pdev); 142 goto unregister_dmic_dev; 143 } 144 chip->chip_pdev = pdev; 145 dev_set_drvdata(&pci->dev, chip); 146 pm_runtime_set_autosuspend_delay(&pci->dev, 2000); 147 pm_runtime_use_autosuspend(&pci->dev); 148 pm_runtime_put_noidle(&pci->dev); 149 pm_runtime_allow(&pci->dev); 150 return ret; 151 152unregister_dmic_dev: 153 platform_device_unregister(dmic_dev); 154release_regions: 155 pci_release_regions(pci); 156disable_pci: 157 pci_disable_device(pci); 158 159 return ret; 160}; 161 162static int __maybe_unused snd_acp_suspend(struct device *dev) 163{ 164 struct acp_chip_info *chip; 165 int ret; 166 167 chip = dev_get_drvdata(dev); 168 ret = acp_deinit(chip->base); 169 if (ret) 170 dev_err(dev, "ACP de-init failed\n"); 171 return ret; 172} 173 174static int __maybe_unused snd_acp_resume(struct device *dev) 175{ 176 struct acp_chip_info *chip; 177 struct acp_dev_data *adata; 178 struct device child; 179 int ret; 180 181 chip = dev_get_drvdata(dev); 182 ret = acp_init(chip); 183 if (ret) 184 dev_err(dev, "ACP init failed\n"); 185 child = chip->chip_pdev->dev; 186 adata = dev_get_drvdata(&child); 187 if (adata) 188 acp_enable_interrupts(adata); 189 return ret; 190} 191 192static const struct dev_pm_ops acp_pm_ops = { 193 SET_RUNTIME_PM_OPS(snd_acp_suspend, snd_acp_resume, NULL) 194 SET_SYSTEM_SLEEP_PM_OPS(snd_acp_suspend, snd_acp_resume) 195}; 196 197static void acp_pci_remove(struct pci_dev *pci) 198{ 199 struct acp_chip_info *chip; 200 int ret; 201 202 chip = pci_get_drvdata(pci); 203 pm_runtime_forbid(&pci->dev); 204 pm_runtime_get_noresume(&pci->dev); 205 if (dmic_dev) 206 platform_device_unregister(dmic_dev); 207 if (pdev) 208 platform_device_unregister(pdev); 209 ret = acp_deinit(chip->base); 210 if (ret) 211 dev_err(&pci->dev, "ACP de-init failed\n"); 212} 213 214/* PCI IDs */ 215static const struct pci_device_id acp_pci_ids[] = { 216 { PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_PCI_DEV_ID)}, 217 { 0, } 218}; 219MODULE_DEVICE_TABLE(pci, acp_pci_ids); 220 221/* pci_driver definition */ 222static struct pci_driver snd_amd_acp_pci_driver = { 223 .name = KBUILD_MODNAME, 224 .id_table = acp_pci_ids, 225 .probe = acp_pci_probe, 226 .remove = acp_pci_remove, 227 .driver = { 228 .pm = &acp_pm_ops, 229 }, 230}; 231module_pci_driver(snd_amd_acp_pci_driver); 232 233MODULE_LICENSE("Dual BSD/GPL"); 234MODULE_IMPORT_NS(SND_SOC_ACP_COMMON); 235MODULE_ALIAS(DRV_NAME); 236