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 chip->acp_rev = pci->revision; 81 switch (pci->revision) { 82 case 0x01: 83 chip->name = "acp_asoc_renoir"; 84 break; 85 case 0x6f: 86 chip->name = "acp_asoc_rembrandt"; 87 break; 88 case 0x63: 89 chip->name = "acp_asoc_acp63"; 90 break; 91 case 0x70: 92 chip->name = "acp_asoc_acp70"; 93 break; 94 case 0x71: 95 chip->name = "acp_asoc_acp70"; 96 break; 97 default: 98 dev_err(dev, "Unsupported device revision:0x%x\n", pci->revision); 99 ret = -EINVAL; 100 goto release_regions; 101 } 102 chip->flag = flag; 103 dmic_dev = platform_device_register_data(dev, "dmic-codec", PLATFORM_DEVID_NONE, NULL, 0); 104 if (IS_ERR(dmic_dev)) { 105 dev_err(dev, "failed to create DMIC device\n"); 106 ret = PTR_ERR(dmic_dev); 107 goto release_regions; 108 } 109 110 addr = pci_resource_start(pci, 0); 111 chip->base = devm_ioremap(&pci->dev, addr, pci_resource_len(pci, 0)); 112 if (!chip->base) { 113 ret = -ENOMEM; 114 goto unregister_dmic_dev; 115 } 116 117 ret = acp_init(chip); 118 if (ret) 119 goto unregister_dmic_dev; 120 121 check_acp_config(pci, chip); 122 if (!chip->is_pdm_dev && !chip->is_i2s_config) 123 goto skip_pdev_creation; 124 125 res = devm_kcalloc(&pci->dev, num_res, sizeof(struct resource), GFP_KERNEL); 126 if (!res) { 127 ret = -ENOMEM; 128 goto unregister_dmic_dev; 129 } 130 131 for (i = 0; i < num_res; i++, res_acp++) { 132 res[i].name = res_acp->name; 133 res[i].flags = res_acp->flags; 134 res[i].start = addr + res_acp->start; 135 res[i].end = addr + res_acp->end; 136 if (res_acp->flags == IORESOURCE_IRQ) { 137 res[i].start = pci->irq; 138 res[i].end = res[i].start; 139 } 140 } 141 142 memset(&pdevinfo, 0, sizeof(pdevinfo)); 143 144 pdevinfo.name = chip->name; 145 pdevinfo.id = 0; 146 pdevinfo.parent = &pci->dev; 147 pdevinfo.num_res = num_res; 148 pdevinfo.res = &res[0]; 149 pdevinfo.data = chip; 150 pdevinfo.size_data = sizeof(*chip); 151 152 pdev = platform_device_register_full(&pdevinfo); 153 if (IS_ERR(pdev)) { 154 dev_err(&pci->dev, "cannot register %s device\n", pdevinfo.name); 155 ret = PTR_ERR(pdev); 156 goto unregister_dmic_dev; 157 } 158 159 skip_pdev_creation: 160 chip->chip_pdev = pdev; 161 dev_set_drvdata(&pci->dev, chip); 162 pm_runtime_set_autosuspend_delay(&pci->dev, 2000); 163 pm_runtime_use_autosuspend(&pci->dev); 164 pm_runtime_put_noidle(&pci->dev); 165 pm_runtime_allow(&pci->dev); 166 return ret; 167 168 unregister_dmic_dev: 169 platform_device_unregister(dmic_dev); 170 release_regions: 171 pci_release_regions(pci); 172 disable_pci: 173 pci_disable_device(pci); 174 175 return ret; 176 }; 177 178 static int __maybe_unused snd_acp_suspend(struct device *dev) 179 { 180 struct acp_chip_info *chip; 181 int ret; 182 183 chip = dev_get_drvdata(dev); 184 ret = acp_deinit(chip); 185 if (ret) 186 dev_err(dev, "ACP de-init failed\n"); 187 return ret; 188 } 189 190 static int __maybe_unused snd_acp_resume(struct device *dev) 191 { 192 struct acp_chip_info *chip; 193 struct acp_dev_data *adata; 194 struct device child; 195 int ret; 196 197 chip = dev_get_drvdata(dev); 198 ret = acp_init(chip); 199 if (ret) 200 dev_err(dev, "ACP init failed\n"); 201 if (chip->chip_pdev) { 202 child = chip->chip_pdev->dev; 203 adata = dev_get_drvdata(&child); 204 if (adata) 205 acp_enable_interrupts(adata); 206 } 207 return ret; 208 } 209 210 static const struct dev_pm_ops acp_pm_ops = { 211 SET_RUNTIME_PM_OPS(snd_acp_suspend, snd_acp_resume, NULL) 212 SET_SYSTEM_SLEEP_PM_OPS(snd_acp_suspend, snd_acp_resume) 213 }; 214 215 static void acp_pci_remove(struct pci_dev *pci) 216 { 217 struct acp_chip_info *chip; 218 int ret; 219 220 chip = pci_get_drvdata(pci); 221 pm_runtime_forbid(&pci->dev); 222 pm_runtime_get_noresume(&pci->dev); 223 if (dmic_dev) 224 platform_device_unregister(dmic_dev); 225 if (pdev) 226 platform_device_unregister(pdev); 227 ret = acp_deinit(chip); 228 if (ret) 229 dev_err(&pci->dev, "ACP de-init failed\n"); 230 } 231 232 /* PCI IDs */ 233 static const struct pci_device_id acp_pci_ids[] = { 234 { PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_PCI_DEV_ID)}, 235 { 0, } 236 }; 237 MODULE_DEVICE_TABLE(pci, acp_pci_ids); 238 239 /* pci_driver definition */ 240 static struct pci_driver snd_amd_acp_pci_driver = { 241 .name = KBUILD_MODNAME, 242 .id_table = acp_pci_ids, 243 .probe = acp_pci_probe, 244 .remove = acp_pci_remove, 245 .driver = { 246 .pm = &acp_pm_ops, 247 }, 248 }; 249 module_pci_driver(snd_amd_acp_pci_driver); 250 251 MODULE_DESCRIPTION("AMD ACP common PCI support"); 252 MODULE_LICENSE("Dual BSD/GPL"); 253 MODULE_IMPORT_NS(SND_SOC_ACP_COMMON); 254 MODULE_ALIAS(DRV_NAME); 255