1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * AMD Pink Sardine ACP PCI Driver 4 * 5 * Copyright 2022 Advanced Micro Devices, Inc. 6 */ 7 8 #include <linux/pci.h> 9 #include <linux/module.h> 10 #include <linux/io.h> 11 #include <linux/delay.h> 12 #include <linux/platform_device.h> 13 #include <linux/acpi.h> 14 #include <linux/interrupt.h> 15 #include <sound/pcm_params.h> 16 #include <linux/pm_runtime.h> 17 #include <linux/iopoll.h> 18 19 #include "acp63.h" 20 21 static int acp63_power_on(void __iomem *acp_base) 22 { 23 u32 val; 24 25 val = readl(acp_base + ACP_PGFSM_STATUS); 26 27 if (!val) 28 return val; 29 30 if ((val & ACP_PGFSM_STATUS_MASK) != ACP_POWER_ON_IN_PROGRESS) 31 writel(ACP_PGFSM_CNTL_POWER_ON_MASK, acp_base + ACP_PGFSM_CONTROL); 32 33 return readl_poll_timeout(acp_base + ACP_PGFSM_STATUS, val, !val, DELAY_US, ACP_TIMEOUT); 34 } 35 36 static int acp63_reset(void __iomem *acp_base) 37 { 38 u32 val; 39 int ret; 40 41 writel(1, acp_base + ACP_SOFT_RESET); 42 43 ret = readl_poll_timeout(acp_base + ACP_SOFT_RESET, val, 44 val & ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK, 45 DELAY_US, ACP_TIMEOUT); 46 if (ret) 47 return ret; 48 49 writel(0, acp_base + ACP_SOFT_RESET); 50 51 return readl_poll_timeout(acp_base + ACP_SOFT_RESET, val, !val, DELAY_US, ACP_TIMEOUT); 52 } 53 54 static void acp63_enable_interrupts(void __iomem *acp_base) 55 { 56 writel(1, acp_base + ACP_EXTERNAL_INTR_ENB); 57 } 58 59 static void acp63_disable_interrupts(void __iomem *acp_base) 60 { 61 writel(ACP_EXT_INTR_STAT_CLEAR_MASK, acp_base + ACP_EXTERNAL_INTR_STAT); 62 writel(0, acp_base + ACP_EXTERNAL_INTR_CNTL); 63 writel(0, acp_base + ACP_EXTERNAL_INTR_ENB); 64 } 65 66 static int acp63_init(void __iomem *acp_base, struct device *dev) 67 { 68 int ret; 69 70 ret = acp63_power_on(acp_base); 71 if (ret) { 72 dev_err(dev, "ACP power on failed\n"); 73 return ret; 74 } 75 writel(0x01, acp_base + ACP_CONTROL); 76 ret = acp63_reset(acp_base); 77 if (ret) { 78 dev_err(dev, "ACP reset failed\n"); 79 return ret; 80 } 81 acp63_enable_interrupts(acp_base); 82 return 0; 83 } 84 85 static int acp63_deinit(void __iomem *acp_base, struct device *dev) 86 { 87 int ret; 88 89 acp63_disable_interrupts(acp_base); 90 ret = acp63_reset(acp_base); 91 if (ret) { 92 dev_err(dev, "ACP reset failed\n"); 93 return ret; 94 } 95 writel(0, acp_base + ACP_CONTROL); 96 return 0; 97 } 98 99 static irqreturn_t acp63_irq_handler(int irq, void *dev_id) 100 { 101 struct acp63_dev_data *adata; 102 struct pdm_dev_data *ps_pdm_data; 103 u32 val; 104 u16 pdev_index; 105 106 adata = dev_id; 107 if (!adata) 108 return IRQ_NONE; 109 110 val = readl(adata->acp63_base + ACP_EXTERNAL_INTR_STAT); 111 if (val & BIT(PDM_DMA_STAT)) { 112 pdev_index = adata->pdm_dev_index; 113 ps_pdm_data = dev_get_drvdata(&adata->pdev[pdev_index]->dev); 114 writel(BIT(PDM_DMA_STAT), adata->acp63_base + ACP_EXTERNAL_INTR_STAT); 115 if (ps_pdm_data->capture_stream) 116 snd_pcm_period_elapsed(ps_pdm_data->capture_stream); 117 return IRQ_HANDLED; 118 } 119 return IRQ_NONE; 120 } 121 122 static void get_acp63_device_config(u32 config, struct pci_dev *pci, 123 struct acp63_dev_data *acp_data) 124 { 125 struct acpi_device *dmic_dev; 126 const union acpi_object *obj; 127 bool is_dmic_dev = false; 128 129 dmic_dev = acpi_find_child_device(ACPI_COMPANION(&pci->dev), ACP63_DMIC_ADDR, 0); 130 if (dmic_dev) { 131 if (!acpi_dev_get_property(dmic_dev, "acp-audio-device-type", 132 ACPI_TYPE_INTEGER, &obj) && 133 obj->integer.value == ACP_DMIC_DEV) 134 is_dmic_dev = true; 135 } 136 137 switch (config) { 138 case ACP_CONFIG_0: 139 case ACP_CONFIG_1: 140 case ACP_CONFIG_2: 141 case ACP_CONFIG_3: 142 case ACP_CONFIG_9: 143 case ACP_CONFIG_15: 144 dev_dbg(&pci->dev, "Audio Mode %d\n", config); 145 break; 146 default: 147 if (is_dmic_dev) { 148 acp_data->pdev_mask = ACP63_PDM_DEV_MASK; 149 acp_data->pdev_count = ACP63_PDM_MODE_DEVS; 150 } 151 break; 152 } 153 } 154 155 static void acp63_fill_platform_dev_info(struct platform_device_info *pdevinfo, 156 struct device *parent, 157 struct fwnode_handle *fw_node, 158 char *name, unsigned int id, 159 const struct resource *res, 160 unsigned int num_res, 161 const void *data, 162 size_t size_data) 163 { 164 pdevinfo->name = name; 165 pdevinfo->id = id; 166 pdevinfo->parent = parent; 167 pdevinfo->num_res = num_res; 168 pdevinfo->res = res; 169 pdevinfo->data = data; 170 pdevinfo->size_data = size_data; 171 pdevinfo->fwnode = fw_node; 172 } 173 174 static int create_acp63_platform_devs(struct pci_dev *pci, struct acp63_dev_data *adata, u32 addr) 175 { 176 struct platform_device_info pdevinfo[ACP63_DEVS]; 177 struct device *parent; 178 int index; 179 int ret; 180 181 parent = &pci->dev; 182 dev_dbg(&pci->dev, 183 "%s pdev_mask:0x%x pdev_count:0x%x\n", __func__, adata->pdev_mask, 184 adata->pdev_count); 185 if (adata->pdev_mask) { 186 adata->res = devm_kzalloc(&pci->dev, sizeof(struct resource), GFP_KERNEL); 187 if (!adata->res) { 188 ret = -ENOMEM; 189 goto de_init; 190 } 191 adata->res->flags = IORESOURCE_MEM; 192 adata->res->start = addr; 193 adata->res->end = addr + (ACP63_REG_END - ACP63_REG_START); 194 memset(&pdevinfo, 0, sizeof(pdevinfo)); 195 } 196 197 switch (adata->pdev_mask) { 198 case ACP63_PDM_DEV_MASK: 199 adata->pdm_dev_index = 0; 200 acp63_fill_platform_dev_info(&pdevinfo[0], parent, NULL, "acp_ps_pdm_dma", 201 0, adata->res, 1, NULL, 0); 202 acp63_fill_platform_dev_info(&pdevinfo[1], parent, NULL, "dmic-codec", 203 0, NULL, 0, NULL, 0); 204 acp63_fill_platform_dev_info(&pdevinfo[2], parent, NULL, "acp_ps_mach", 205 0, NULL, 0, NULL, 0); 206 break; 207 default: 208 dev_dbg(&pci->dev, "No PDM devices found\n"); 209 return 0; 210 } 211 212 for (index = 0; index < adata->pdev_count; index++) { 213 adata->pdev[index] = platform_device_register_full(&pdevinfo[index]); 214 if (IS_ERR(adata->pdev[index])) { 215 dev_err(&pci->dev, 216 "cannot register %s device\n", pdevinfo[index].name); 217 ret = PTR_ERR(adata->pdev[index]); 218 goto unregister_devs; 219 } 220 } 221 return 0; 222 unregister_devs: 223 for (--index; index >= 0; index--) 224 platform_device_unregister(adata->pdev[index]); 225 de_init: 226 if (acp63_deinit(adata->acp63_base, &pci->dev)) 227 dev_err(&pci->dev, "ACP de-init failed\n"); 228 return ret; 229 } 230 231 static int snd_acp63_probe(struct pci_dev *pci, 232 const struct pci_device_id *pci_id) 233 { 234 struct acp63_dev_data *adata; 235 u32 addr; 236 u32 irqflags, flag; 237 int val; 238 int ret; 239 240 irqflags = IRQF_SHARED; 241 242 /* Return if acp config flag is defined */ 243 flag = snd_amd_acp_find_config(pci); 244 if (flag) 245 return -ENODEV; 246 247 /* Pink Sardine device check */ 248 switch (pci->revision) { 249 case 0x63: 250 break; 251 default: 252 dev_dbg(&pci->dev, "acp63 pci device not found\n"); 253 return -ENODEV; 254 } 255 if (pci_enable_device(pci)) { 256 dev_err(&pci->dev, "pci_enable_device failed\n"); 257 return -ENODEV; 258 } 259 260 ret = pci_request_regions(pci, "AMD ACP6.2 audio"); 261 if (ret < 0) { 262 dev_err(&pci->dev, "pci_request_regions failed\n"); 263 goto disable_pci; 264 } 265 adata = devm_kzalloc(&pci->dev, sizeof(struct acp63_dev_data), 266 GFP_KERNEL); 267 if (!adata) { 268 ret = -ENOMEM; 269 goto release_regions; 270 } 271 272 addr = pci_resource_start(pci, 0); 273 adata->acp63_base = devm_ioremap(&pci->dev, addr, 274 pci_resource_len(pci, 0)); 275 if (!adata->acp63_base) { 276 ret = -ENOMEM; 277 goto release_regions; 278 } 279 pci_set_master(pci); 280 pci_set_drvdata(pci, adata); 281 mutex_init(&adata->acp_lock); 282 ret = acp63_init(adata->acp63_base, &pci->dev); 283 if (ret) 284 goto release_regions; 285 ret = devm_request_irq(&pci->dev, pci->irq, acp63_irq_handler, 286 irqflags, "ACP_PCI_IRQ", adata); 287 if (ret) { 288 dev_err(&pci->dev, "ACP PCI IRQ request failed\n"); 289 goto de_init; 290 } 291 val = readl(adata->acp63_base + ACP_PIN_CONFIG); 292 get_acp63_device_config(val, pci, adata); 293 ret = create_acp63_platform_devs(pci, adata, addr); 294 if (ret < 0) { 295 dev_err(&pci->dev, "ACP platform devices creation failed\n"); 296 goto de_init; 297 } 298 pm_runtime_set_autosuspend_delay(&pci->dev, ACP_SUSPEND_DELAY_MS); 299 pm_runtime_use_autosuspend(&pci->dev); 300 pm_runtime_put_noidle(&pci->dev); 301 pm_runtime_allow(&pci->dev); 302 return 0; 303 de_init: 304 if (acp63_deinit(adata->acp63_base, &pci->dev)) 305 dev_err(&pci->dev, "ACP de-init failed\n"); 306 release_regions: 307 pci_release_regions(pci); 308 disable_pci: 309 pci_disable_device(pci); 310 311 return ret; 312 } 313 314 static int __maybe_unused snd_acp63_suspend(struct device *dev) 315 { 316 struct acp63_dev_data *adata; 317 int ret; 318 319 adata = dev_get_drvdata(dev); 320 ret = acp63_deinit(adata->acp63_base, dev); 321 if (ret) 322 dev_err(dev, "ACP de-init failed\n"); 323 return ret; 324 } 325 326 static int __maybe_unused snd_acp63_resume(struct device *dev) 327 { 328 struct acp63_dev_data *adata; 329 int ret; 330 331 adata = dev_get_drvdata(dev); 332 ret = acp63_init(adata->acp63_base, dev); 333 if (ret) 334 dev_err(dev, "ACP init failed\n"); 335 return ret; 336 } 337 338 static const struct dev_pm_ops acp63_pm_ops = { 339 SET_RUNTIME_PM_OPS(snd_acp63_suspend, snd_acp63_resume, NULL) 340 SET_SYSTEM_SLEEP_PM_OPS(snd_acp63_suspend, snd_acp63_resume) 341 }; 342 343 static void snd_acp63_remove(struct pci_dev *pci) 344 { 345 struct acp63_dev_data *adata; 346 int ret, index; 347 348 adata = pci_get_drvdata(pci); 349 for (index = 0; index < adata->pdev_count; index++) 350 platform_device_unregister(adata->pdev[index]); 351 ret = acp63_deinit(adata->acp63_base, &pci->dev); 352 if (ret) 353 dev_err(&pci->dev, "ACP de-init failed\n"); 354 pm_runtime_forbid(&pci->dev); 355 pm_runtime_get_noresume(&pci->dev); 356 pci_release_regions(pci); 357 pci_disable_device(pci); 358 } 359 360 static const struct pci_device_id snd_acp63_ids[] = { 361 { PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_DEVICE_ID), 362 .class = PCI_CLASS_MULTIMEDIA_OTHER << 8, 363 .class_mask = 0xffffff }, 364 { 0, }, 365 }; 366 MODULE_DEVICE_TABLE(pci, snd_acp63_ids); 367 368 static struct pci_driver ps_acp63_driver = { 369 .name = KBUILD_MODNAME, 370 .id_table = snd_acp63_ids, 371 .probe = snd_acp63_probe, 372 .remove = snd_acp63_remove, 373 .driver = { 374 .pm = &acp63_pm_ops, 375 } 376 }; 377 378 module_pci_driver(ps_acp63_driver); 379 380 MODULE_AUTHOR("Vijendar.Mukunda@amd.com"); 381 MODULE_AUTHOR("Syed.SabaKareem@amd.com"); 382 MODULE_DESCRIPTION("AMD ACP Pink Sardine PCI driver"); 383 MODULE_LICENSE("GPL v2"); 384