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 irqreturn_t irq_handler(int irq, void *data) 30 { 31 struct acp_chip_info *chip = data; 32 33 if (chip && chip->acp_hw_ops && chip->acp_hw_ops->irq) 34 return chip->acp_hw_ops->irq(irq, chip); 35 36 return IRQ_NONE; 37 } 38 static void acp_fill_platform_dev_info(struct platform_device_info *pdevinfo, 39 struct device *parent, 40 struct fwnode_handle *fw_node, 41 char *name, unsigned int id, 42 const struct resource *res, 43 unsigned int num_res, 44 const void *data, 45 size_t size_data) 46 { 47 pdevinfo->name = name; 48 pdevinfo->id = id; 49 pdevinfo->parent = parent; 50 pdevinfo->num_res = num_res; 51 pdevinfo->res = res; 52 pdevinfo->data = data; 53 pdevinfo->size_data = size_data; 54 pdevinfo->fwnode = fw_node; 55 } 56 57 static int create_acp_platform_devs(struct pci_dev *pci, struct acp_chip_info *chip, u32 addr) 58 { 59 struct platform_device_info pdevinfo; 60 struct device *parent; 61 int ret; 62 63 parent = &pci->dev; 64 65 if (chip->is_i2s_config || chip->is_pdm_dev) { 66 chip->res = devm_kzalloc(&pci->dev, sizeof(struct resource), GFP_KERNEL); 67 if (!chip->res) { 68 ret = -ENOMEM; 69 goto err; 70 } 71 chip->res->flags = IORESOURCE_MEM; 72 chip->res->start = addr; 73 chip->res->end = addr + (ACP3x_REG_END - ACP3x_REG_START); 74 memset(&pdevinfo, 0, sizeof(pdevinfo)); 75 } 76 77 memset(&pdevinfo, 0, sizeof(pdevinfo)); 78 acp_fill_platform_dev_info(&pdevinfo, parent, NULL, chip->name, 79 0, chip->res, 1, chip, sizeof(*chip)); 80 81 chip->acp_plat_dev = platform_device_register_full(&pdevinfo); 82 if (IS_ERR(chip->acp_plat_dev)) { 83 dev_err(&pci->dev, 84 "cannot register %s device\n", pdevinfo.name); 85 ret = PTR_ERR(chip->acp_plat_dev); 86 goto err; 87 } 88 if (chip->is_pdm_dev && chip->is_pdm_config) { 89 chip->dmic_codec_dev = platform_device_register_data(&pci->dev, 90 "dmic-codec", 91 PLATFORM_DEVID_NONE, 92 NULL, 0); 93 if (IS_ERR(chip->dmic_codec_dev)) { 94 dev_err(&pci->dev, "failed to create DMIC device\n"); 95 ret = PTR_ERR(chip->dmic_codec_dev); 96 goto unregister_acp_plat_dev; 97 } 98 } 99 return 0; 100 unregister_acp_plat_dev: 101 platform_device_unregister(chip->acp_plat_dev); 102 err: 103 return ret; 104 } 105 106 static int acp_pci_probe(struct pci_dev *pci, const struct pci_device_id *pci_id) 107 { 108 struct device *dev = &pci->dev; 109 struct acp_chip_info *chip; 110 unsigned int flag, addr; 111 int ret; 112 113 flag = snd_amd_acp_find_config(pci); 114 if (flag != FLAG_AMD_LEGACY && flag != FLAG_AMD_LEGACY_ONLY_DMIC) 115 return -ENODEV; 116 117 chip = devm_kzalloc(&pci->dev, sizeof(*chip), GFP_KERNEL); 118 if (!chip) 119 return -ENOMEM; 120 121 if (pci_enable_device(pci)) 122 return dev_err_probe(&pci->dev, -ENODEV, 123 "pci_enable_device failed\n"); 124 125 ret = pci_request_regions(pci, "AMD ACP3x audio"); 126 if (ret < 0) { 127 dev_err(&pci->dev, "pci_request_regions failed\n"); 128 ret = -ENOMEM; 129 goto disable_pci; 130 } 131 132 pci_set_master(pci); 133 134 chip->acp_rev = pci->revision; 135 switch (pci->revision) { 136 case 0x01: 137 chip->name = "acp_asoc_renoir"; 138 chip->rsrc = &rn_rsrc; 139 chip->acp_hw_ops_init = acp31_hw_ops_init; 140 chip->machines = &snd_soc_acpi_amd_acp_machines; 141 break; 142 case 0x6f: 143 chip->name = "acp_asoc_rembrandt"; 144 chip->rsrc = &rmb_rsrc; 145 chip->acp_hw_ops_init = acp6x_hw_ops_init; 146 chip->machines = &snd_soc_acpi_amd_rmb_acp_machines; 147 break; 148 case 0x63: 149 chip->name = "acp_asoc_acp63"; 150 chip->rsrc = &acp63_rsrc; 151 chip->acp_hw_ops_init = acp63_hw_ops_init; 152 chip->machines = &snd_soc_acpi_amd_acp63_acp_machines; 153 break; 154 case 0x70: 155 case 0x71: 156 chip->name = "acp_asoc_acp70"; 157 chip->rsrc = &acp70_rsrc; 158 chip->acp_hw_ops_init = acp70_hw_ops_init; 159 chip->machines = &snd_soc_acpi_amd_acp70_acp_machines; 160 break; 161 default: 162 dev_err(dev, "Unsupported device revision:0x%x\n", pci->revision); 163 ret = -EINVAL; 164 goto release_regions; 165 } 166 chip->flag = flag; 167 168 addr = pci_resource_start(pci, 0); 169 chip->base = devm_ioremap(&pci->dev, addr, pci_resource_len(pci, 0)); 170 if (!chip->base) { 171 ret = -ENOMEM; 172 goto release_regions; 173 } 174 175 chip->addr = addr; 176 177 chip->acp_hw_ops_init(chip); 178 ret = acp_hw_init(chip); 179 if (ret) 180 goto release_regions; 181 182 ret = devm_request_irq(dev, pci->irq, irq_handler, 183 IRQF_SHARED, "ACP_I2S_IRQ", chip); 184 if (ret) { 185 dev_err(&pci->dev, "ACP I2S IRQ request failed %d\n", ret); 186 goto de_init; 187 } 188 189 check_acp_config(pci, chip); 190 if (!chip->is_pdm_dev && !chip->is_i2s_config) 191 goto skip_pdev_creation; 192 193 ret = create_acp_platform_devs(pci, chip, addr); 194 if (ret < 0) { 195 dev_err(&pci->dev, "ACP platform devices creation failed\n"); 196 goto de_init; 197 } 198 199 chip->chip_pdev = chip->acp_plat_dev; 200 chip->dev = &chip->acp_plat_dev->dev; 201 202 acp_machine_select(chip); 203 204 INIT_LIST_HEAD(&chip->stream_list); 205 spin_lock_init(&chip->acp_lock); 206 skip_pdev_creation: 207 dev_set_drvdata(&pci->dev, chip); 208 pm_runtime_set_autosuspend_delay(&pci->dev, 2000); 209 pm_runtime_use_autosuspend(&pci->dev); 210 pm_runtime_put_noidle(&pci->dev); 211 pm_runtime_allow(&pci->dev); 212 return ret; 213 214 de_init: 215 acp_hw_deinit(chip); 216 release_regions: 217 pci_release_regions(pci); 218 disable_pci: 219 pci_disable_device(pci); 220 221 return ret; 222 }; 223 224 static int snd_acp_suspend(struct device *dev) 225 { 226 struct acp_chip_info *chip; 227 int ret; 228 229 chip = dev_get_drvdata(dev); 230 ret = acp_hw_deinit(chip); 231 if (ret) 232 dev_err(dev, "ACP de-init failed\n"); 233 return ret; 234 } 235 236 static int snd_acp_resume(struct device *dev) 237 { 238 struct acp_chip_info *chip; 239 int ret; 240 241 chip = dev_get_drvdata(dev); 242 ret = acp_hw_init(chip); 243 if (ret) 244 dev_err(dev, "ACP init failed\n"); 245 246 ret = acp_hw_en_interrupts(chip); 247 if (ret) 248 dev_err(dev, "ACP en-interrupts failed\n"); 249 250 return ret; 251 } 252 253 static const struct dev_pm_ops acp_pm_ops = { 254 RUNTIME_PM_OPS(snd_acp_suspend, snd_acp_resume, NULL) 255 SYSTEM_SLEEP_PM_OPS(snd_acp_suspend, snd_acp_resume) 256 }; 257 258 static void acp_pci_remove(struct pci_dev *pci) 259 { 260 struct acp_chip_info *chip; 261 int ret; 262 263 chip = pci_get_drvdata(pci); 264 pm_runtime_forbid(&pci->dev); 265 pm_runtime_get_noresume(&pci->dev); 266 if (chip->dmic_codec_dev) 267 platform_device_unregister(chip->dmic_codec_dev); 268 if (chip->acp_plat_dev) 269 platform_device_unregister(chip->acp_plat_dev); 270 if (chip->mach_dev) 271 platform_device_unregister(chip->mach_dev); 272 273 ret = acp_hw_deinit(chip); 274 if (ret) 275 dev_err(&pci->dev, "ACP de-init failed\n"); 276 } 277 278 /* PCI IDs */ 279 static const struct pci_device_id acp_pci_ids[] = { 280 { PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_PCI_DEV_ID)}, 281 { 0, } 282 }; 283 MODULE_DEVICE_TABLE(pci, acp_pci_ids); 284 285 /* pci_driver definition */ 286 static struct pci_driver snd_amd_acp_pci_driver = { 287 .name = KBUILD_MODNAME, 288 .id_table = acp_pci_ids, 289 .probe = acp_pci_probe, 290 .remove = acp_pci_remove, 291 .driver = { 292 .pm = pm_ptr(&acp_pm_ops), 293 }, 294 }; 295 module_pci_driver(snd_amd_acp_pci_driver); 296 297 MODULE_DESCRIPTION("AMD ACP common PCI support"); 298 MODULE_LICENSE("Dual BSD/GPL"); 299 MODULE_IMPORT_NS("SND_SOC_ACP_COMMON"); 300 MODULE_ALIAS(DRV_NAME); 301