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 && 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 default: 99 dev_err(dev, "Unsupported device revision:0x%x\n", pci->revision); 100 ret = -EINVAL; 101 goto release_regions; 102 } 103 chip->flag = flag; 104 dmic_dev = platform_device_register_data(dev, "dmic-codec", PLATFORM_DEVID_NONE, NULL, 0); 105 if (IS_ERR(dmic_dev)) { 106 dev_err(dev, "failed to create DMIC device\n"); 107 ret = PTR_ERR(dmic_dev); 108 goto release_regions; 109 } 110 111 addr = pci_resource_start(pci, 0); 112 chip->base = devm_ioremap(&pci->dev, addr, pci_resource_len(pci, 0)); 113 if (!chip->base) { 114 ret = -ENOMEM; 115 goto unregister_dmic_dev; 116 } 117 118 ret = acp_init(chip); 119 if (ret) 120 goto unregister_dmic_dev; 121 122 check_acp_config(pci, chip); 123 if (!chip->is_pdm_dev && !chip->is_i2s_config) 124 goto skip_pdev_creation; 125 126 res = devm_kcalloc(&pci->dev, num_res, sizeof(struct resource), GFP_KERNEL); 127 if (!res) { 128 ret = -ENOMEM; 129 goto unregister_dmic_dev; 130 } 131 132 for (i = 0; i < num_res; i++, res_acp++) { 133 res[i].name = res_acp->name; 134 res[i].flags = res_acp->flags; 135 res[i].start = addr + res_acp->start; 136 res[i].end = addr + res_acp->end; 137 if (res_acp->flags == IORESOURCE_IRQ) { 138 res[i].start = pci->irq; 139 res[i].end = res[i].start; 140 } 141 } 142 143 memset(&pdevinfo, 0, sizeof(pdevinfo)); 144 145 pdevinfo.name = chip->name; 146 pdevinfo.id = 0; 147 pdevinfo.parent = &pci->dev; 148 pdevinfo.num_res = num_res; 149 pdevinfo.res = &res[0]; 150 pdevinfo.data = chip; 151 pdevinfo.size_data = sizeof(*chip); 152 153 pdev = platform_device_register_full(&pdevinfo); 154 if (IS_ERR(pdev)) { 155 dev_err(&pci->dev, "cannot register %s device\n", pdevinfo.name); 156 ret = PTR_ERR(pdev); 157 goto unregister_dmic_dev; 158 } 159 160 skip_pdev_creation: 161 chip->chip_pdev = pdev; 162 dev_set_drvdata(&pci->dev, chip); 163 pm_runtime_set_autosuspend_delay(&pci->dev, 2000); 164 pm_runtime_use_autosuspend(&pci->dev); 165 pm_runtime_put_noidle(&pci->dev); 166 pm_runtime_allow(&pci->dev); 167 return ret; 168 169 unregister_dmic_dev: 170 platform_device_unregister(dmic_dev); 171 release_regions: 172 pci_release_regions(pci); 173 disable_pci: 174 pci_disable_device(pci); 175 176 return ret; 177 }; 178 179 static int __maybe_unused snd_acp_suspend(struct device *dev) 180 { 181 struct acp_chip_info *chip; 182 int ret; 183 184 chip = dev_get_drvdata(dev); 185 ret = acp_deinit(chip); 186 if (ret) 187 dev_err(dev, "ACP de-init failed\n"); 188 return ret; 189 } 190 191 static int __maybe_unused snd_acp_resume(struct device *dev) 192 { 193 struct acp_chip_info *chip; 194 struct acp_dev_data *adata; 195 struct device child; 196 int ret; 197 198 chip = dev_get_drvdata(dev); 199 ret = acp_init(chip); 200 if (ret) 201 dev_err(dev, "ACP init failed\n"); 202 if (chip->chip_pdev) { 203 child = chip->chip_pdev->dev; 204 adata = dev_get_drvdata(&child); 205 if (adata) 206 acp_enable_interrupts(adata); 207 } 208 return ret; 209 } 210 211 static const struct dev_pm_ops acp_pm_ops = { 212 SET_RUNTIME_PM_OPS(snd_acp_suspend, snd_acp_resume, NULL) 213 SET_SYSTEM_SLEEP_PM_OPS(snd_acp_suspend, snd_acp_resume) 214 }; 215 216 static void acp_pci_remove(struct pci_dev *pci) 217 { 218 struct acp_chip_info *chip; 219 int ret; 220 221 chip = pci_get_drvdata(pci); 222 pm_runtime_forbid(&pci->dev); 223 pm_runtime_get_noresume(&pci->dev); 224 if (dmic_dev) 225 platform_device_unregister(dmic_dev); 226 if (pdev) 227 platform_device_unregister(pdev); 228 ret = acp_deinit(chip); 229 if (ret) 230 dev_err(&pci->dev, "ACP de-init failed\n"); 231 } 232 233 /* PCI IDs */ 234 static const struct pci_device_id acp_pci_ids[] = { 235 { PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_PCI_DEV_ID)}, 236 { 0, } 237 }; 238 MODULE_DEVICE_TABLE(pci, acp_pci_ids); 239 240 /* pci_driver definition */ 241 static struct pci_driver snd_amd_acp_pci_driver = { 242 .name = KBUILD_MODNAME, 243 .id_table = acp_pci_ids, 244 .probe = acp_pci_probe, 245 .remove = acp_pci_remove, 246 .driver = { 247 .pm = &acp_pm_ops, 248 }, 249 }; 250 module_pci_driver(snd_amd_acp_pci_driver); 251 252 MODULE_DESCRIPTION("AMD ACP common PCI support"); 253 MODULE_LICENSE("Dual BSD/GPL"); 254 MODULE_IMPORT_NS(SND_SOC_ACP_COMMON); 255 MODULE_ALIAS(DRV_NAME); 256