1 // SPDX-License-Identifier: GPL-2.0+ 2 // 3 // AMD ACP PCI Driver 4 // 5 //Copyright 2016 Advanced Micro Devices, Inc. 6 7 #include <linux/pci.h> 8 #include <linux/module.h> 9 #include <linux/io.h> 10 #include <linux/platform_device.h> 11 #include <linux/interrupt.h> 12 #include <linux/pm_runtime.h> 13 #include <linux/delay.h> 14 15 #include "acp3x.h" 16 17 struct acp3x_dev_data { 18 void __iomem *acp3x_base; 19 bool acp3x_audio_mode; 20 struct resource *res; 21 struct platform_device *pdev[ACP3x_DEVS]; 22 }; 23 24 static int acp3x_power_on(void __iomem *acp3x_base) 25 { 26 u32 val; 27 int timeout; 28 29 val = rv_readl(acp3x_base + mmACP_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 rv_writel(ACP_PGFSM_CNTL_POWER_ON_MASK, 37 acp3x_base + mmACP_PGFSM_CONTROL); 38 timeout = 0; 39 while (++timeout < 500) { 40 val = rv_readl(acp3x_base + mmACP_PGFSM_STATUS); 41 if (!val) 42 return 0; 43 udelay(1); 44 } 45 return -ETIMEDOUT; 46 } 47 48 static int acp3x_reset(void __iomem *acp3x_base) 49 { 50 u32 val; 51 int timeout; 52 53 rv_writel(1, acp3x_base + mmACP_SOFT_RESET); 54 timeout = 0; 55 while (++timeout < 500) { 56 val = rv_readl(acp3x_base + mmACP_SOFT_RESET); 57 if (val & ACP3x_SOFT_RESET__SoftResetAudDone_MASK) 58 break; 59 cpu_relax(); 60 } 61 rv_writel(0, acp3x_base + mmACP_SOFT_RESET); 62 timeout = 0; 63 while (++timeout < 500) { 64 val = rv_readl(acp3x_base + mmACP_SOFT_RESET); 65 if (!val) 66 return 0; 67 cpu_relax(); 68 } 69 return -ETIMEDOUT; 70 } 71 72 static int acp3x_init(void __iomem *acp3x_base) 73 { 74 int ret; 75 76 /* power on */ 77 ret = acp3x_power_on(acp3x_base); 78 if (ret) { 79 pr_err("ACP3x power on failed\n"); 80 return ret; 81 } 82 /* Reset */ 83 ret = acp3x_reset(acp3x_base); 84 if (ret) { 85 pr_err("ACP3x reset failed\n"); 86 return ret; 87 } 88 return 0; 89 } 90 91 static int acp3x_deinit(void __iomem *acp3x_base) 92 { 93 int ret; 94 95 /* Reset */ 96 ret = acp3x_reset(acp3x_base); 97 if (ret) { 98 pr_err("ACP3x reset failed\n"); 99 return ret; 100 } 101 return 0; 102 } 103 104 static int snd_acp3x_probe(struct pci_dev *pci, 105 const struct pci_device_id *pci_id) 106 { 107 struct acp3x_dev_data *adata; 108 struct platform_device_info pdevinfo[ACP3x_DEVS]; 109 unsigned int irqflags; 110 int ret, i; 111 u32 addr, val; 112 113 if (pci_enable_device(pci)) { 114 dev_err(&pci->dev, "pci_enable_device failed\n"); 115 return -ENODEV; 116 } 117 118 ret = pci_request_regions(pci, "AMD ACP3x audio"); 119 if (ret < 0) { 120 dev_err(&pci->dev, "pci_request_regions failed\n"); 121 goto disable_pci; 122 } 123 124 adata = devm_kzalloc(&pci->dev, sizeof(struct acp3x_dev_data), 125 GFP_KERNEL); 126 if (!adata) { 127 ret = -ENOMEM; 128 goto release_regions; 129 } 130 131 /* check for msi interrupt support */ 132 ret = pci_enable_msi(pci); 133 if (ret) 134 /* msi is not enabled */ 135 irqflags = IRQF_SHARED; 136 else 137 /* msi is enabled */ 138 irqflags = 0; 139 140 addr = pci_resource_start(pci, 0); 141 adata->acp3x_base = devm_ioremap(&pci->dev, addr, 142 pci_resource_len(pci, 0)); 143 if (!adata->acp3x_base) { 144 ret = -ENOMEM; 145 goto disable_msi; 146 } 147 pci_set_master(pci); 148 pci_set_drvdata(pci, adata); 149 ret = acp3x_init(adata->acp3x_base); 150 if (ret) 151 goto disable_msi; 152 153 val = rv_readl(adata->acp3x_base + mmACP_I2S_PIN_CONFIG); 154 switch (val) { 155 case I2S_MODE: 156 adata->res = devm_kzalloc(&pci->dev, 157 sizeof(struct resource) * 4, 158 GFP_KERNEL); 159 if (!adata->res) { 160 ret = -ENOMEM; 161 goto de_init; 162 } 163 164 adata->res[0].name = "acp3x_i2s_iomem"; 165 adata->res[0].flags = IORESOURCE_MEM; 166 adata->res[0].start = addr; 167 adata->res[0].end = addr + (ACP3x_REG_END - ACP3x_REG_START); 168 169 adata->res[1].name = "acp3x_i2s_sp"; 170 adata->res[1].flags = IORESOURCE_MEM; 171 adata->res[1].start = addr + ACP3x_I2STDM_REG_START; 172 adata->res[1].end = addr + ACP3x_I2STDM_REG_END; 173 174 adata->res[2].name = "acp3x_i2s_bt"; 175 adata->res[2].flags = IORESOURCE_MEM; 176 adata->res[2].start = addr + ACP3x_BT_TDM_REG_START; 177 adata->res[2].end = addr + ACP3x_BT_TDM_REG_END; 178 179 adata->res[3].name = "acp3x_i2s_irq"; 180 adata->res[3].flags = IORESOURCE_IRQ; 181 adata->res[3].start = pci->irq; 182 adata->res[3].end = adata->res[3].start; 183 184 adata->acp3x_audio_mode = ACP3x_I2S_MODE; 185 186 memset(&pdevinfo, 0, sizeof(pdevinfo)); 187 pdevinfo[0].name = "acp3x_rv_i2s_dma"; 188 pdevinfo[0].id = 0; 189 pdevinfo[0].parent = &pci->dev; 190 pdevinfo[0].num_res = 4; 191 pdevinfo[0].res = &adata->res[0]; 192 pdevinfo[0].data = &irqflags; 193 pdevinfo[0].size_data = sizeof(irqflags); 194 195 pdevinfo[1].name = "acp3x_i2s_playcap"; 196 pdevinfo[1].id = 0; 197 pdevinfo[1].parent = &pci->dev; 198 pdevinfo[1].num_res = 1; 199 pdevinfo[1].res = &adata->res[1]; 200 201 pdevinfo[2].name = "acp3x_i2s_playcap"; 202 pdevinfo[2].id = 1; 203 pdevinfo[2].parent = &pci->dev; 204 pdevinfo[2].num_res = 1; 205 pdevinfo[2].res = &adata->res[1]; 206 207 pdevinfo[3].name = "acp3x_i2s_playcap"; 208 pdevinfo[3].id = 2; 209 pdevinfo[3].parent = &pci->dev; 210 pdevinfo[3].num_res = 1; 211 pdevinfo[3].res = &adata->res[2]; 212 for (i = 0; i < ACP3x_DEVS; i++) { 213 adata->pdev[i] = 214 platform_device_register_full(&pdevinfo[i]); 215 if (IS_ERR(adata->pdev[i])) { 216 dev_err(&pci->dev, "cannot register %s device\n", 217 pdevinfo[i].name); 218 ret = PTR_ERR(adata->pdev[i]); 219 goto unregister_devs; 220 } 221 } 222 break; 223 default: 224 dev_err(&pci->dev, "Invalid ACP audio mode : %d\n", val); 225 ret = -ENODEV; 226 goto disable_msi; 227 } 228 pm_runtime_set_autosuspend_delay(&pci->dev, 2000); 229 pm_runtime_use_autosuspend(&pci->dev); 230 pm_runtime_set_active(&pci->dev); 231 pm_runtime_put_noidle(&pci->dev); 232 pm_runtime_enable(&pci->dev); 233 pm_runtime_allow(&pci->dev); 234 return 0; 235 236 unregister_devs: 237 if (val == I2S_MODE) 238 for (i = 0; i < ACP3x_DEVS; i++) 239 platform_device_unregister(adata->pdev[i]); 240 de_init: 241 if (acp3x_deinit(adata->acp3x_base)) 242 dev_err(&pci->dev, "ACP de-init failed\n"); 243 disable_msi: 244 pci_disable_msi(pci); 245 release_regions: 246 pci_release_regions(pci); 247 disable_pci: 248 pci_disable_device(pci); 249 250 return ret; 251 } 252 253 static int snd_acp3x_suspend(struct device *dev) 254 { 255 int ret; 256 struct acp3x_dev_data *adata; 257 258 adata = dev_get_drvdata(dev); 259 ret = acp3x_deinit(adata->acp3x_base); 260 if (ret) 261 dev_err(dev, "ACP de-init failed\n"); 262 else 263 dev_dbg(dev, "ACP de-initialized\n"); 264 265 return 0; 266 } 267 268 static int snd_acp3x_resume(struct device *dev) 269 { 270 int ret; 271 struct acp3x_dev_data *adata; 272 273 adata = dev_get_drvdata(dev); 274 ret = acp3x_init(adata->acp3x_base); 275 if (ret) { 276 dev_err(dev, "ACP init failed\n"); 277 return ret; 278 } 279 return 0; 280 } 281 282 static const struct dev_pm_ops acp3x_pm = { 283 .runtime_suspend = snd_acp3x_suspend, 284 .runtime_resume = snd_acp3x_resume, 285 .resume = snd_acp3x_resume, 286 }; 287 288 static void snd_acp3x_remove(struct pci_dev *pci) 289 { 290 struct acp3x_dev_data *adata; 291 int i, ret; 292 293 adata = pci_get_drvdata(pci); 294 if (adata->acp3x_audio_mode == ACP3x_I2S_MODE) { 295 for (i = 0; i < ACP3x_DEVS; i++) 296 platform_device_unregister(adata->pdev[i]); 297 } 298 ret = acp3x_deinit(adata->acp3x_base); 299 if (ret) 300 dev_err(&pci->dev, "ACP de-init failed\n"); 301 pm_runtime_disable(&pci->dev); 302 pm_runtime_get_noresume(&pci->dev); 303 pci_disable_msi(pci); 304 pci_release_regions(pci); 305 pci_disable_device(pci); 306 } 307 308 static const struct pci_device_id snd_acp3x_ids[] = { 309 { PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x15e2), 310 .class = PCI_CLASS_MULTIMEDIA_OTHER << 8, 311 .class_mask = 0xffffff }, 312 { 0, }, 313 }; 314 MODULE_DEVICE_TABLE(pci, snd_acp3x_ids); 315 316 static struct pci_driver acp3x_driver = { 317 .name = KBUILD_MODNAME, 318 .id_table = snd_acp3x_ids, 319 .probe = snd_acp3x_probe, 320 .remove = snd_acp3x_remove, 321 .driver = { 322 .pm = &acp3x_pm, 323 } 324 }; 325 326 module_pci_driver(acp3x_driver); 327 328 MODULE_AUTHOR("Vishnuvardhanrao.Ravulapati@amd.com"); 329 MODULE_AUTHOR("Maruthi.Bayyavarapu@amd.com"); 330 MODULE_DESCRIPTION("AMD ACP3x PCI driver"); 331 MODULE_LICENSE("GPL v2"); 332