1 // SPDX-License-Identifier: GPL-2.0+ 2 // 3 // AMD Vangogh ACP PCI Driver 4 // 5 // Copyright (C) 2021 Advanced Micro Devices, Inc. All rights reserved. 6 7 #include <linux/pci.h> 8 #include <linux/module.h> 9 #include <linux/io.h> 10 #include <linux/delay.h> 11 #include <linux/platform_device.h> 12 #include <linux/interrupt.h> 13 #include <linux/pm_runtime.h> 14 15 #include "acp5x.h" 16 17 struct acp5x_dev_data { 18 void __iomem *acp5x_base; 19 bool acp5x_audio_mode; 20 struct resource *res; 21 struct platform_device *pdev[ACP5x_DEVS]; 22 }; 23 24 static int acp5x_power_on(void __iomem *acp5x_base) 25 { 26 u32 val; 27 int timeout; 28 29 val = acp_readl(acp5x_base + ACP_PGFSM_STATUS); 30 31 if (val == 0) 32 return val; 33 34 if ((val & ACP_PGFSM_STATUS_MASK) != 35 ACP_POWER_ON_IN_PROGRESS) 36 acp_writel(ACP_PGFSM_CNTL_POWER_ON_MASK, 37 acp5x_base + ACP_PGFSM_CONTROL); 38 timeout = 0; 39 while (++timeout < 500) { 40 val = acp_readl(acp5x_base + ACP_PGFSM_STATUS); 41 if ((val & ACP_PGFSM_STATUS_MASK) == ACP_POWERED_ON) 42 return 0; 43 udelay(1); 44 } 45 return -ETIMEDOUT; 46 } 47 48 static int acp5x_reset(void __iomem *acp5x_base) 49 { 50 u32 val; 51 int timeout; 52 53 acp_writel(1, acp5x_base + ACP_SOFT_RESET); 54 timeout = 0; 55 while (++timeout < 500) { 56 val = acp_readl(acp5x_base + ACP_SOFT_RESET); 57 if (val & ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK) 58 break; 59 cpu_relax(); 60 } 61 acp_writel(0, acp5x_base + ACP_SOFT_RESET); 62 timeout = 0; 63 while (++timeout < 500) { 64 val = acp_readl(acp5x_base + ACP_SOFT_RESET); 65 if (!val) 66 return 0; 67 cpu_relax(); 68 } 69 return -ETIMEDOUT; 70 } 71 72 static void acp5x_enable_interrupts(void __iomem *acp5x_base) 73 { 74 acp_writel(0x01, acp5x_base + ACP_EXTERNAL_INTR_ENB); 75 } 76 77 static void acp5x_disable_interrupts(void __iomem *acp5x_base) 78 { 79 acp_writel(ACP_EXT_INTR_STAT_CLEAR_MASK, acp5x_base + 80 ACP_EXTERNAL_INTR_STAT); 81 acp_writel(0x00, acp5x_base + ACP_EXTERNAL_INTR_CNTL); 82 acp_writel(0x00, acp5x_base + ACP_EXTERNAL_INTR_ENB); 83 } 84 85 static int acp5x_init(void __iomem *acp5x_base) 86 { 87 int ret; 88 89 /* power on */ 90 ret = acp5x_power_on(acp5x_base); 91 if (ret) { 92 pr_err("ACP5x power on failed\n"); 93 return ret; 94 } 95 acp_writel(0x01, acp5x_base + ACP_CONTROL); 96 /* Reset */ 97 ret = acp5x_reset(acp5x_base); 98 if (ret) { 99 pr_err("ACP5x reset failed\n"); 100 return ret; 101 } 102 acp_writel(0x03, acp5x_base + ACP_CLKMUX_SEL); 103 acp5x_enable_interrupts(acp5x_base); 104 return 0; 105 } 106 107 static int acp5x_deinit(void __iomem *acp5x_base) 108 { 109 int ret; 110 111 acp5x_disable_interrupts(acp5x_base); 112 /* Reset */ 113 ret = acp5x_reset(acp5x_base); 114 if (ret) { 115 pr_err("ACP5x reset failed\n"); 116 return ret; 117 } 118 acp_writel(0x00, acp5x_base + ACP_CLKMUX_SEL); 119 acp_writel(0x00, acp5x_base + ACP_CONTROL); 120 return 0; 121 } 122 123 static int snd_acp5x_probe(struct pci_dev *pci, 124 const struct pci_device_id *pci_id) 125 { 126 struct acp5x_dev_data *adata; 127 struct platform_device_info pdevinfo[ACP5x_DEVS]; 128 unsigned int irqflags; 129 int ret, i; 130 u32 addr, val; 131 132 irqflags = IRQF_SHARED; 133 if (pci->revision != 0x50) 134 return -ENODEV; 135 136 if (pci_enable_device(pci)) { 137 dev_err(&pci->dev, "pci_enable_device failed\n"); 138 return -ENODEV; 139 } 140 141 ret = pci_request_regions(pci, "AMD ACP5x audio"); 142 if (ret < 0) { 143 dev_err(&pci->dev, "pci_request_regions failed\n"); 144 goto disable_pci; 145 } 146 147 adata = devm_kzalloc(&pci->dev, sizeof(struct acp5x_dev_data), 148 GFP_KERNEL); 149 if (!adata) { 150 ret = -ENOMEM; 151 goto release_regions; 152 } 153 addr = pci_resource_start(pci, 0); 154 adata->acp5x_base = devm_ioremap(&pci->dev, addr, 155 pci_resource_len(pci, 0)); 156 if (!adata->acp5x_base) { 157 ret = -ENOMEM; 158 goto release_regions; 159 } 160 pci_set_master(pci); 161 pci_set_drvdata(pci, adata); 162 ret = acp5x_init(adata->acp5x_base); 163 if (ret) 164 goto release_regions; 165 166 val = acp_readl(adata->acp5x_base + ACP_PIN_CONFIG); 167 switch (val) { 168 case I2S_MODE: 169 adata->res = devm_kzalloc(&pci->dev, 170 sizeof(struct resource) * ACP5x_RES, 171 GFP_KERNEL); 172 if (!adata->res) { 173 ret = -ENOMEM; 174 goto de_init; 175 } 176 177 adata->res[0].name = "acp5x_i2s_iomem"; 178 adata->res[0].flags = IORESOURCE_MEM; 179 adata->res[0].start = addr; 180 adata->res[0].end = addr + (ACP5x_REG_END - ACP5x_REG_START); 181 182 adata->res[1].name = "acp5x_i2s_sp"; 183 adata->res[1].flags = IORESOURCE_MEM; 184 adata->res[1].start = addr + ACP5x_I2STDM_REG_START; 185 adata->res[1].end = addr + ACP5x_I2STDM_REG_END; 186 187 adata->res[2].name = "acp5x_i2s_hs"; 188 adata->res[2].flags = IORESOURCE_MEM; 189 adata->res[2].start = addr + ACP5x_HS_TDM_REG_START; 190 adata->res[2].end = addr + ACP5x_HS_TDM_REG_END; 191 192 adata->res[3].name = "acp5x_i2s_irq"; 193 adata->res[3].flags = IORESOURCE_IRQ; 194 adata->res[3].start = pci->irq; 195 adata->res[3].end = adata->res[3].start; 196 197 adata->acp5x_audio_mode = ACP5x_I2S_MODE; 198 199 memset(&pdevinfo, 0, sizeof(pdevinfo)); 200 pdevinfo[0].name = "acp5x_i2s_dma"; 201 pdevinfo[0].id = 0; 202 pdevinfo[0].parent = &pci->dev; 203 pdevinfo[0].num_res = 4; 204 pdevinfo[0].res = &adata->res[0]; 205 pdevinfo[0].data = &irqflags; 206 pdevinfo[0].size_data = sizeof(irqflags); 207 208 pdevinfo[1].name = "acp5x_i2s_playcap"; 209 pdevinfo[1].id = 0; 210 pdevinfo[1].parent = &pci->dev; 211 pdevinfo[1].num_res = 1; 212 pdevinfo[1].res = &adata->res[1]; 213 214 pdevinfo[2].name = "acp5x_i2s_playcap"; 215 pdevinfo[2].id = 1; 216 pdevinfo[2].parent = &pci->dev; 217 pdevinfo[2].num_res = 1; 218 pdevinfo[2].res = &adata->res[2]; 219 220 pdevinfo[3].name = "acp5x_mach"; 221 pdevinfo[3].id = 0; 222 pdevinfo[3].parent = &pci->dev; 223 for (i = 0; i < ACP5x_DEVS; i++) { 224 adata->pdev[i] = 225 platform_device_register_full(&pdevinfo[i]); 226 if (IS_ERR(adata->pdev[i])) { 227 dev_err(&pci->dev, "cannot register %s device\n", 228 pdevinfo[i].name); 229 ret = PTR_ERR(adata->pdev[i]); 230 goto unregister_devs; 231 } 232 } 233 break; 234 default: 235 dev_info(&pci->dev, "ACP audio mode : %d\n", val); 236 } 237 pm_runtime_set_autosuspend_delay(&pci->dev, 2000); 238 pm_runtime_use_autosuspend(&pci->dev); 239 pm_runtime_put_noidle(&pci->dev); 240 pm_runtime_allow(&pci->dev); 241 return 0; 242 243 unregister_devs: 244 for (--i; i >= 0; i--) 245 platform_device_unregister(adata->pdev[i]); 246 de_init: 247 if (acp5x_deinit(adata->acp5x_base)) 248 dev_err(&pci->dev, "ACP de-init failed\n"); 249 release_regions: 250 pci_release_regions(pci); 251 disable_pci: 252 pci_disable_device(pci); 253 254 return ret; 255 } 256 257 static int __maybe_unused snd_acp5x_suspend(struct device *dev) 258 { 259 int ret; 260 struct acp5x_dev_data *adata; 261 262 adata = dev_get_drvdata(dev); 263 ret = acp5x_deinit(adata->acp5x_base); 264 if (ret) 265 dev_err(dev, "ACP de-init failed\n"); 266 else 267 dev_dbg(dev, "ACP de-initialized\n"); 268 269 return ret; 270 } 271 272 static int __maybe_unused snd_acp5x_resume(struct device *dev) 273 { 274 int ret; 275 struct acp5x_dev_data *adata; 276 277 adata = dev_get_drvdata(dev); 278 ret = acp5x_init(adata->acp5x_base); 279 if (ret) { 280 dev_err(dev, "ACP init failed\n"); 281 return ret; 282 } 283 return 0; 284 } 285 286 static const struct dev_pm_ops acp5x_pm = { 287 SET_RUNTIME_PM_OPS(snd_acp5x_suspend, 288 snd_acp5x_resume, NULL) 289 SET_SYSTEM_SLEEP_PM_OPS(snd_acp5x_suspend, snd_acp5x_resume) 290 }; 291 292 static void snd_acp5x_remove(struct pci_dev *pci) 293 { 294 struct acp5x_dev_data *adata; 295 int i, ret; 296 297 adata = pci_get_drvdata(pci); 298 if (adata->acp5x_audio_mode == ACP5x_I2S_MODE) { 299 for (i = 0; i < ACP5x_DEVS; i++) 300 platform_device_unregister(adata->pdev[i]); 301 } 302 ret = acp5x_deinit(adata->acp5x_base); 303 if (ret) 304 dev_err(&pci->dev, "ACP de-init failed\n"); 305 pm_runtime_forbid(&pci->dev); 306 pm_runtime_get_noresume(&pci->dev); 307 pci_release_regions(pci); 308 pci_disable_device(pci); 309 } 310 311 static const struct pci_device_id snd_acp5x_ids[] = { 312 { PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_DEVICE_ID), 313 .class = PCI_CLASS_MULTIMEDIA_OTHER << 8, 314 .class_mask = 0xffffff }, 315 { 0, }, 316 }; 317 MODULE_DEVICE_TABLE(pci, snd_acp5x_ids); 318 319 static struct pci_driver acp5x_driver = { 320 .name = KBUILD_MODNAME, 321 .id_table = snd_acp5x_ids, 322 .probe = snd_acp5x_probe, 323 .remove = snd_acp5x_remove, 324 .driver = { 325 .pm = &acp5x_pm, 326 } 327 }; 328 329 module_pci_driver(acp5x_driver); 330 331 MODULE_AUTHOR("Vijendar.Mukunda@amd.com"); 332 MODULE_DESCRIPTION("AMD Vangogh ACP PCI driver"); 333 MODULE_LICENSE("GPL v2"); 334