1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * AMD Yellow Carp ACP PCI Driver 4 * 5 * Copyright 2021 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/interrupt.h> 14 #include <sound/pcm_params.h> 15 #include <linux/pm_runtime.h> 16 17 #include "acp6x.h" 18 19 struct acp6x_dev_data { 20 void __iomem *acp6x_base; 21 struct resource *res; 22 bool acp6x_audio_mode; 23 struct platform_device *pdev[ACP6x_DEVS]; 24 }; 25 26 static int acp6x_power_on(void __iomem *acp_base) 27 { 28 u32 val; 29 int timeout; 30 31 val = acp6x_readl(acp_base + ACP_PGFSM_STATUS); 32 33 if (!val) 34 return val; 35 36 if ((val & ACP_PGFSM_STATUS_MASK) != ACP_POWER_ON_IN_PROGRESS) 37 acp6x_writel(ACP_PGFSM_CNTL_POWER_ON_MASK, acp_base + ACP_PGFSM_CONTROL); 38 timeout = 0; 39 while (++timeout < 500) { 40 val = acp6x_readl(acp_base + ACP_PGFSM_STATUS); 41 if (!val) 42 return 0; 43 udelay(1); 44 } 45 return -ETIMEDOUT; 46 } 47 48 static int acp6x_reset(void __iomem *acp_base) 49 { 50 u32 val; 51 int timeout; 52 53 acp6x_writel(1, acp_base + ACP_SOFT_RESET); 54 timeout = 0; 55 while (++timeout < 500) { 56 val = acp6x_readl(acp_base + ACP_SOFT_RESET); 57 if (val & ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK) 58 break; 59 cpu_relax(); 60 } 61 acp6x_writel(0, acp_base + ACP_SOFT_RESET); 62 timeout = 0; 63 while (++timeout < 500) { 64 val = acp6x_readl(acp_base + ACP_SOFT_RESET); 65 if (!val) 66 return 0; 67 cpu_relax(); 68 } 69 return -ETIMEDOUT; 70 } 71 72 static void acp6x_enable_interrupts(void __iomem *acp_base) 73 { 74 acp6x_writel(0x01, acp_base + ACP_EXTERNAL_INTR_ENB); 75 } 76 77 static void acp6x_disable_interrupts(void __iomem *acp_base) 78 { 79 acp6x_writel(ACP_EXT_INTR_STAT_CLEAR_MASK, acp_base + 80 ACP_EXTERNAL_INTR_STAT); 81 acp6x_writel(0x00, acp_base + ACP_EXTERNAL_INTR_CNTL); 82 acp6x_writel(0x00, acp_base + ACP_EXTERNAL_INTR_ENB); 83 } 84 85 static int acp6x_init(void __iomem *acp_base) 86 { 87 int ret; 88 89 /* power on */ 90 ret = acp6x_power_on(acp_base); 91 if (ret) { 92 pr_err("ACP power on failed\n"); 93 return ret; 94 } 95 acp6x_writel(0x01, acp_base + ACP_CONTROL); 96 /* Reset */ 97 ret = acp6x_reset(acp_base); 98 if (ret) { 99 pr_err("ACP reset failed\n"); 100 return ret; 101 } 102 acp6x_writel(0x03, acp_base + ACP_CLKMUX_SEL); 103 acp6x_enable_interrupts(acp_base); 104 return 0; 105 } 106 107 static int acp6x_deinit(void __iomem *acp_base) 108 { 109 int ret; 110 111 acp6x_disable_interrupts(acp_base); 112 /* Reset */ 113 ret = acp6x_reset(acp_base); 114 if (ret) { 115 pr_err("ACP reset failed\n"); 116 return ret; 117 } 118 acp6x_writel(0x00, acp_base + ACP_CLKMUX_SEL); 119 acp6x_writel(0x00, acp_base + ACP_CONTROL); 120 return 0; 121 } 122 123 static irqreturn_t acp6x_irq_handler(int irq, void *dev_id) 124 { 125 struct acp6x_dev_data *adata; 126 struct pdm_dev_data *yc_pdm_data; 127 u32 val; 128 129 adata = dev_id; 130 if (!adata) 131 return IRQ_NONE; 132 133 val = acp6x_readl(adata->acp6x_base + ACP_EXTERNAL_INTR_STAT); 134 if (val & BIT(PDM_DMA_STAT)) { 135 yc_pdm_data = dev_get_drvdata(&adata->pdev[0]->dev); 136 acp6x_writel(BIT(PDM_DMA_STAT), adata->acp6x_base + ACP_EXTERNAL_INTR_STAT); 137 if (yc_pdm_data->capture_stream) 138 snd_pcm_period_elapsed(yc_pdm_data->capture_stream); 139 return IRQ_HANDLED; 140 } 141 return IRQ_NONE; 142 } 143 144 static int snd_acp6x_probe(struct pci_dev *pci, 145 const struct pci_device_id *pci_id) 146 { 147 struct acp6x_dev_data *adata; 148 struct platform_device_info pdevinfo[ACP6x_DEVS]; 149 int index = 0; 150 int val = 0x00; 151 u32 addr; 152 unsigned int irqflags; 153 int ret; 154 155 irqflags = IRQF_SHARED; 156 /* Yellow Carp device check */ 157 if (pci->revision != 0x60) 158 return -ENODEV; 159 160 if (pci_enable_device(pci)) { 161 dev_err(&pci->dev, "pci_enable_device failed\n"); 162 return -ENODEV; 163 } 164 165 ret = pci_request_regions(pci, "AMD ACP3x audio"); 166 if (ret < 0) { 167 dev_err(&pci->dev, "pci_request_regions failed\n"); 168 goto disable_pci; 169 } 170 171 adata = devm_kzalloc(&pci->dev, sizeof(struct acp6x_dev_data), 172 GFP_KERNEL); 173 if (!adata) { 174 ret = -ENOMEM; 175 goto release_regions; 176 } 177 178 addr = pci_resource_start(pci, 0); 179 adata->acp6x_base = devm_ioremap(&pci->dev, addr, 180 pci_resource_len(pci, 0)); 181 if (!adata->acp6x_base) { 182 ret = -ENOMEM; 183 goto release_regions; 184 } 185 pci_set_master(pci); 186 pci_set_drvdata(pci, adata); 187 ret = acp6x_init(adata->acp6x_base); 188 if (ret) 189 goto release_regions; 190 val = acp6x_readl(adata->acp6x_base + ACP_PIN_CONFIG); 191 switch (val) { 192 case ACP_CONFIG_0: 193 case ACP_CONFIG_1: 194 case ACP_CONFIG_2: 195 case ACP_CONFIG_3: 196 case ACP_CONFIG_9: 197 case ACP_CONFIG_15: 198 dev_info(&pci->dev, "Audio Mode %d\n", val); 199 break; 200 default: 201 adata->res = devm_kzalloc(&pci->dev, 202 sizeof(struct resource), 203 GFP_KERNEL); 204 if (!adata->res) { 205 ret = -ENOMEM; 206 goto de_init; 207 } 208 209 adata->res->name = "acp_iomem"; 210 adata->res->flags = IORESOURCE_MEM; 211 adata->res->start = addr; 212 adata->res->end = addr + (ACP6x_REG_END - ACP6x_REG_START); 213 214 adata->acp6x_audio_mode = ACP6x_PDM_MODE; 215 216 memset(&pdevinfo, 0, sizeof(pdevinfo)); 217 pdevinfo[0].name = "acp_yc_pdm_dma"; 218 pdevinfo[0].id = 0; 219 pdevinfo[0].parent = &pci->dev; 220 pdevinfo[0].num_res = 1; 221 pdevinfo[0].res = adata->res; 222 223 pdevinfo[1].name = "dmic-codec"; 224 pdevinfo[1].id = 0; 225 pdevinfo[1].parent = &pci->dev; 226 227 pdevinfo[2].name = "acp_yc_mach"; 228 pdevinfo[2].id = 0; 229 pdevinfo[2].parent = &pci->dev; 230 231 for (index = 0; index < ACP6x_DEVS; index++) { 232 adata->pdev[index] = 233 platform_device_register_full(&pdevinfo[index]); 234 if (IS_ERR(adata->pdev[index])) { 235 dev_err(&pci->dev, "cannot register %s device\n", 236 pdevinfo[index].name); 237 ret = PTR_ERR(adata->pdev[index]); 238 goto unregister_devs; 239 } 240 } 241 break; 242 } 243 ret = devm_request_irq(&pci->dev, pci->irq, acp6x_irq_handler, 244 irqflags, "ACP_PCI_IRQ", adata); 245 if (ret) { 246 dev_err(&pci->dev, "ACP PCI IRQ request failed\n"); 247 goto unregister_devs; 248 } 249 pm_runtime_set_autosuspend_delay(&pci->dev, ACP_SUSPEND_DELAY_MS); 250 pm_runtime_use_autosuspend(&pci->dev); 251 pm_runtime_put_noidle(&pci->dev); 252 pm_runtime_allow(&pci->dev); 253 254 return 0; 255 unregister_devs: 256 for (--index; index >= 0; index--) 257 platform_device_unregister(adata->pdev[index]); 258 de_init: 259 if (acp6x_deinit(adata->acp6x_base)) 260 dev_err(&pci->dev, "ACP de-init failed\n"); 261 release_regions: 262 pci_release_regions(pci); 263 disable_pci: 264 pci_disable_device(pci); 265 266 return ret; 267 } 268 269 static int __maybe_unused snd_acp6x_suspend(struct device *dev) 270 { 271 struct acp6x_dev_data *adata; 272 int ret; 273 274 adata = dev_get_drvdata(dev); 275 ret = acp6x_deinit(adata->acp6x_base); 276 if (ret) 277 dev_err(dev, "ACP de-init failed\n"); 278 return ret; 279 } 280 281 static int __maybe_unused snd_acp6x_resume(struct device *dev) 282 { 283 struct acp6x_dev_data *adata; 284 int ret; 285 286 adata = dev_get_drvdata(dev); 287 ret = acp6x_init(adata->acp6x_base); 288 if (ret) 289 dev_err(dev, "ACP init failed\n"); 290 return ret; 291 } 292 293 static const struct dev_pm_ops acp6x_pm = { 294 SET_RUNTIME_PM_OPS(snd_acp6x_suspend, snd_acp6x_resume, NULL) 295 SET_SYSTEM_SLEEP_PM_OPS(snd_acp6x_suspend, snd_acp6x_resume) 296 }; 297 298 static void snd_acp6x_remove(struct pci_dev *pci) 299 { 300 struct acp6x_dev_data *adata; 301 int ret, index; 302 303 adata = pci_get_drvdata(pci); 304 if (adata->acp6x_audio_mode == ACP6x_PDM_MODE) { 305 for (index = 0; index < ACP6x_DEVS; index++) 306 platform_device_unregister(adata->pdev[index]); 307 } 308 ret = acp6x_deinit(adata->acp6x_base); 309 if (ret) 310 dev_err(&pci->dev, "ACP de-init failed\n"); 311 pm_runtime_forbid(&pci->dev); 312 pm_runtime_get_noresume(&pci->dev); 313 pci_release_regions(pci); 314 pci_disable_device(pci); 315 } 316 317 static const struct pci_device_id snd_acp6x_ids[] = { 318 { PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_DEVICE_ID), 319 .class = PCI_CLASS_MULTIMEDIA_OTHER << 8, 320 .class_mask = 0xffffff }, 321 { 0, }, 322 }; 323 MODULE_DEVICE_TABLE(pci, snd_acp6x_ids); 324 325 static struct pci_driver yc_acp6x_driver = { 326 .name = KBUILD_MODNAME, 327 .id_table = snd_acp6x_ids, 328 .probe = snd_acp6x_probe, 329 .remove = snd_acp6x_remove, 330 .driver = { 331 .pm = &acp6x_pm, 332 } 333 }; 334 335 module_pci_driver(yc_acp6x_driver); 336 337 MODULE_AUTHOR("Vijendar.Mukunda@amd.com"); 338 MODULE_DESCRIPTION("AMD ACP Yellow Carp PCI driver"); 339 MODULE_LICENSE("GPL v2"); 340