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 29 static struct platform_device *dmic_dev; 30 static struct platform_device *pdev; 31 32 static 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 47 static 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 ret = acp_init(chip); 111 if (ret) 112 goto unregister_dmic_dev; 113 114 res = devm_kcalloc(&pci->dev, num_res, sizeof(struct resource), GFP_KERNEL); 115 if (!res) { 116 ret = -ENOMEM; 117 goto unregister_dmic_dev; 118 } 119 120 for (i = 0; i < num_res; i++, res_acp++) { 121 res[i].name = res_acp->name; 122 res[i].flags = res_acp->flags; 123 res[i].start = addr + res_acp->start; 124 res[i].end = addr + res_acp->end; 125 if (res_acp->flags == IORESOURCE_IRQ) { 126 res[i].start = pci->irq; 127 res[i].end = res[i].start; 128 } 129 } 130 131 memset(&pdevinfo, 0, sizeof(pdevinfo)); 132 133 pdevinfo.name = chip->name; 134 pdevinfo.id = 0; 135 pdevinfo.parent = &pci->dev; 136 pdevinfo.num_res = num_res; 137 pdevinfo.res = &res[0]; 138 pdevinfo.data = chip; 139 pdevinfo.size_data = sizeof(*chip); 140 141 pdev = platform_device_register_full(&pdevinfo); 142 if (IS_ERR(pdev)) { 143 dev_err(&pci->dev, "cannot register %s device\n", pdevinfo.name); 144 ret = PTR_ERR(pdev); 145 goto unregister_dmic_dev; 146 } 147 chip->chip_pdev = pdev; 148 dev_set_drvdata(&pci->dev, chip); 149 pm_runtime_set_autosuspend_delay(&pci->dev, 2000); 150 pm_runtime_use_autosuspend(&pci->dev); 151 pm_runtime_put_noidle(&pci->dev); 152 pm_runtime_allow(&pci->dev); 153 return ret; 154 155 unregister_dmic_dev: 156 platform_device_unregister(dmic_dev); 157 release_regions: 158 pci_release_regions(pci); 159 disable_pci: 160 pci_disable_device(pci); 161 162 return ret; 163 }; 164 165 static int __maybe_unused snd_acp_suspend(struct device *dev) 166 { 167 struct acp_chip_info *chip; 168 int ret; 169 170 chip = dev_get_drvdata(dev); 171 ret = acp_deinit(chip->base); 172 if (ret) 173 dev_err(dev, "ACP de-init failed\n"); 174 return ret; 175 } 176 177 static int __maybe_unused snd_acp_resume(struct device *dev) 178 { 179 struct acp_chip_info *chip; 180 struct acp_dev_data *adata; 181 struct device child; 182 int ret; 183 184 chip = dev_get_drvdata(dev); 185 ret = acp_init(chip); 186 if (ret) 187 dev_err(dev, "ACP init failed\n"); 188 child = chip->chip_pdev->dev; 189 adata = dev_get_drvdata(&child); 190 if (adata) 191 acp_enable_interrupts(adata); 192 return ret; 193 } 194 195 static const struct dev_pm_ops acp_pm_ops = { 196 SET_RUNTIME_PM_OPS(snd_acp_suspend, snd_acp_resume, NULL) 197 SET_SYSTEM_SLEEP_PM_OPS(snd_acp_suspend, snd_acp_resume) 198 }; 199 200 static void acp_pci_remove(struct pci_dev *pci) 201 { 202 struct acp_chip_info *chip; 203 int ret; 204 205 chip = pci_get_drvdata(pci); 206 pm_runtime_forbid(&pci->dev); 207 pm_runtime_get_noresume(&pci->dev); 208 if (dmic_dev) 209 platform_device_unregister(dmic_dev); 210 if (pdev) 211 platform_device_unregister(pdev); 212 ret = acp_deinit(chip->base); 213 if (ret) 214 dev_err(&pci->dev, "ACP de-init failed\n"); 215 } 216 217 /* PCI IDs */ 218 static const struct pci_device_id acp_pci_ids[] = { 219 { PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_PCI_DEV_ID)}, 220 { 0, } 221 }; 222 MODULE_DEVICE_TABLE(pci, acp_pci_ids); 223 224 /* pci_driver definition */ 225 static struct pci_driver snd_amd_acp_pci_driver = { 226 .name = KBUILD_MODNAME, 227 .id_table = acp_pci_ids, 228 .probe = acp_pci_probe, 229 .remove = acp_pci_remove, 230 .driver = { 231 .pm = &acp_pm_ops, 232 }, 233 }; 234 module_pci_driver(snd_amd_acp_pci_driver); 235 236 MODULE_LICENSE("Dual BSD/GPL"); 237 MODULE_IMPORT_NS(SND_SOC_ACP_COMMON); 238 MODULE_ALIAS(DRV_NAME); 239