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 20 #include "amd.h" 21 #include "../mach-config.h" 22 23 #define DRV_NAME "acp_pci" 24 25 #define ACP3x_REG_START 0x1240000 26 #define ACP3x_REG_END 0x125C000 27 28 static struct platform_device *dmic_dev; 29 static struct platform_device *pdev; 30 31 static const struct resource acp3x_res[] = { 32 { 33 .start = 0, 34 .end = ACP3x_REG_END - ACP3x_REG_START, 35 .name = "acp_mem", 36 .flags = IORESOURCE_MEM, 37 }, 38 { 39 .start = 0, 40 .end = 0, 41 .name = "acp_dai_irq", 42 .flags = IORESOURCE_IRQ, 43 }, 44 }; 45 46 static int acp_pci_probe(struct pci_dev *pci, const struct pci_device_id *pci_id) 47 { 48 struct platform_device_info pdevinfo; 49 struct device *dev = &pci->dev; 50 const struct resource *res_acp; 51 struct acp_chip_info *chip; 52 struct resource *res; 53 unsigned int flag, addr, num_res, i; 54 int ret; 55 56 flag = snd_amd_acp_find_config(pci); 57 if (flag != FLAG_AMD_LEGACY) 58 return -ENODEV; 59 60 chip = devm_kzalloc(&pci->dev, sizeof(*chip), GFP_KERNEL); 61 if (!chip) 62 return -ENOMEM; 63 64 if (pci_enable_device(pci)) { 65 dev_err(&pci->dev, "pci_enable_device failed\n"); 66 return -ENODEV; 67 } 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 return -ENOMEM; 73 } 74 75 pci_set_master(pci); 76 77 switch (pci->revision) { 78 case 0x01: 79 res_acp = acp3x_res; 80 num_res = ARRAY_SIZE(acp3x_res); 81 chip->name = "acp_asoc_renoir"; 82 chip->acp_rev = ACP3X_DEV; 83 break; 84 default: 85 dev_err(dev, "Unsupported device revision:0x%x\n", pci->revision); 86 return -EINVAL; 87 } 88 89 dmic_dev = platform_device_register_data(dev, "dmic-codec", PLATFORM_DEVID_NONE, NULL, 0); 90 if (IS_ERR(dmic_dev)) { 91 dev_err(dev, "failed to create DMIC device\n"); 92 return PTR_ERR(dmic_dev); 93 } 94 95 addr = pci_resource_start(pci, 0); 96 chip->base = devm_ioremap(&pci->dev, addr, pci_resource_len(pci, 0)); 97 98 res = devm_kzalloc(&pci->dev, sizeof(struct resource) * num_res, GFP_KERNEL); 99 if (!res) { 100 platform_device_unregister(dmic_dev); 101 return -ENOMEM; 102 } 103 104 for (i = 0; i < num_res; i++, res_acp++) { 105 res[i].name = res_acp->name; 106 res[i].flags = res_acp->flags; 107 res[i].start = addr + res_acp->start; 108 res[i].end = addr + res_acp->end; 109 if (res_acp->flags == IORESOURCE_IRQ) { 110 res[i].start = pci->irq; 111 res[i].end = res[i].start; 112 } 113 } 114 115 memset(&pdevinfo, 0, sizeof(pdevinfo)); 116 117 pdevinfo.name = chip->name; 118 pdevinfo.id = 0; 119 pdevinfo.parent = &pci->dev; 120 pdevinfo.num_res = num_res; 121 pdevinfo.res = &res[0]; 122 pdevinfo.data = chip; 123 pdevinfo.size_data = sizeof(*chip); 124 125 pdev = platform_device_register_full(&pdevinfo); 126 if (IS_ERR(pdev)) { 127 dev_err(&pci->dev, "cannot register %s device\n", pdevinfo.name); 128 platform_device_unregister(dmic_dev); 129 ret = PTR_ERR(pdev); 130 } 131 132 return ret; 133 }; 134 135 static void acp_pci_remove(struct pci_dev *pci) 136 { 137 if (dmic_dev) 138 platform_device_unregister(dmic_dev); 139 if (pdev) 140 platform_device_unregister(pdev); 141 } 142 143 /* PCI IDs */ 144 static const struct pci_device_id acp_pci_ids[] = { 145 { PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_PCI_DEV_ID)}, 146 { 0, } 147 }; 148 MODULE_DEVICE_TABLE(pci, acp_pci_ids); 149 150 /* pci_driver definition */ 151 static struct pci_driver snd_amd_acp_pci_driver = { 152 .name = KBUILD_MODNAME, 153 .id_table = acp_pci_ids, 154 .probe = acp_pci_probe, 155 .remove = acp_pci_remove, 156 }; 157 module_pci_driver(snd_amd_acp_pci_driver); 158 159 MODULE_LICENSE("Dual BSD/GPL"); 160 MODULE_ALIAS(DRV_NAME); 161