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/pm_runtime.h> 19 #include <linux/module.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 dev_err(&pci->dev, "pci_enable_device failed\n"); 67 return -ENODEV; 68 } 69 70 ret = pci_request_regions(pci, "AMD ACP3x audio"); 71 if (ret < 0) { 72 dev_err(&pci->dev, "pci_request_regions failed\n"); 73 ret = -ENOMEM; 74 goto disable_pci; 75 } 76 77 pci_set_master(pci); 78 79 res_acp = acp_res; 80 num_res = ARRAY_SIZE(acp_res); 81 82 switch (pci->revision) { 83 case 0x01: 84 chip->name = "acp_asoc_renoir"; 85 chip->acp_rev = ACP3X_DEV; 86 break; 87 case 0x6f: 88 chip->name = "acp_asoc_rembrandt"; 89 chip->acp_rev = ACP6X_DEV; 90 break; 91 default: 92 dev_err(dev, "Unsupported device revision:0x%x\n", pci->revision); 93 ret = -EINVAL; 94 goto release_regions; 95 } 96 97 dmic_dev = platform_device_register_data(dev, "dmic-codec", PLATFORM_DEVID_NONE, NULL, 0); 98 if (IS_ERR(dmic_dev)) { 99 dev_err(dev, "failed to create DMIC device\n"); 100 ret = PTR_ERR(dmic_dev); 101 goto release_regions; 102 } 103 104 addr = pci_resource_start(pci, 0); 105 chip->base = devm_ioremap(&pci->dev, addr, pci_resource_len(pci, 0)); 106 if (!chip->base) { 107 ret = -ENOMEM; 108 goto release_regions; 109 } 110 111 res = devm_kzalloc(&pci->dev, sizeof(struct resource) * num_res, GFP_KERNEL); 112 if (!res) { 113 platform_device_unregister(dmic_dev); 114 ret = -ENOMEM; 115 goto release_regions; 116 } 117 118 for (i = 0; i < num_res; i++, res_acp++) { 119 res[i].name = res_acp->name; 120 res[i].flags = res_acp->flags; 121 res[i].start = addr + res_acp->start; 122 res[i].end = addr + res_acp->end; 123 if (res_acp->flags == IORESOURCE_IRQ) { 124 res[i].start = pci->irq; 125 res[i].end = res[i].start; 126 } 127 } 128 129 memset(&pdevinfo, 0, sizeof(pdevinfo)); 130 131 pdevinfo.name = chip->name; 132 pdevinfo.id = 0; 133 pdevinfo.parent = &pci->dev; 134 pdevinfo.num_res = num_res; 135 pdevinfo.res = &res[0]; 136 pdevinfo.data = chip; 137 pdevinfo.size_data = sizeof(*chip); 138 139 pdev = platform_device_register_full(&pdevinfo); 140 if (IS_ERR(pdev)) { 141 dev_err(&pci->dev, "cannot register %s device\n", pdevinfo.name); 142 platform_device_unregister(dmic_dev); 143 ret = PTR_ERR(pdev); 144 goto release_regions; 145 } 146 147 return ret; 148 149 release_regions: 150 pci_release_regions(pci); 151 disable_pci: 152 pci_disable_device(pci); 153 154 return ret; 155 }; 156 157 static void acp_pci_remove(struct pci_dev *pci) 158 { 159 if (dmic_dev) 160 platform_device_unregister(dmic_dev); 161 if (pdev) 162 platform_device_unregister(pdev); 163 } 164 165 /* PCI IDs */ 166 static const struct pci_device_id acp_pci_ids[] = { 167 { PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_PCI_DEV_ID)}, 168 { 0, } 169 }; 170 MODULE_DEVICE_TABLE(pci, acp_pci_ids); 171 172 /* pci_driver definition */ 173 static struct pci_driver snd_amd_acp_pci_driver = { 174 .name = KBUILD_MODNAME, 175 .id_table = acp_pci_ids, 176 .probe = acp_pci_probe, 177 .remove = acp_pci_remove, 178 }; 179 module_pci_driver(snd_amd_acp_pci_driver); 180 181 MODULE_LICENSE("Dual BSD/GPL"); 182 MODULE_ALIAS(DRV_NAME); 183