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 /* Set PME_EN as after ACP power On, 43 * PME_EN gets cleared 44 */ 45 rv_writel(0x1, acp3x_base + mmACP_PME_EN); 46 return 0; 47 } 48 udelay(1); 49 } 50 return -ETIMEDOUT; 51 } 52 53 static int acp3x_reset(void __iomem *acp3x_base) 54 { 55 u32 val; 56 int timeout; 57 58 rv_writel(1, acp3x_base + mmACP_SOFT_RESET); 59 timeout = 0; 60 while (++timeout < 500) { 61 val = rv_readl(acp3x_base + mmACP_SOFT_RESET); 62 if (val & ACP3x_SOFT_RESET__SoftResetAudDone_MASK) 63 break; 64 cpu_relax(); 65 } 66 rv_writel(0, acp3x_base + mmACP_SOFT_RESET); 67 timeout = 0; 68 while (++timeout < 500) { 69 val = rv_readl(acp3x_base + mmACP_SOFT_RESET); 70 if (!val) 71 return 0; 72 cpu_relax(); 73 } 74 return -ETIMEDOUT; 75 } 76 77 static int acp3x_init(void __iomem *acp3x_base) 78 { 79 int ret; 80 81 /* power on */ 82 ret = acp3x_power_on(acp3x_base); 83 if (ret) { 84 pr_err("ACP3x power on failed\n"); 85 return ret; 86 } 87 /* Reset */ 88 ret = acp3x_reset(acp3x_base); 89 if (ret) { 90 pr_err("ACP3x reset failed\n"); 91 return ret; 92 } 93 return 0; 94 } 95 96 static int acp3x_deinit(void __iomem *acp3x_base) 97 { 98 int ret; 99 100 /* Reset */ 101 ret = acp3x_reset(acp3x_base); 102 if (ret) { 103 pr_err("ACP3x reset failed\n"); 104 return ret; 105 } 106 return 0; 107 } 108 109 static int snd_acp3x_probe(struct pci_dev *pci, 110 const struct pci_device_id *pci_id) 111 { 112 struct acp3x_dev_data *adata; 113 struct platform_device_info pdevinfo[ACP3x_DEVS]; 114 unsigned int irqflags; 115 int ret, i; 116 u32 addr, val; 117 118 if (pci_enable_device(pci)) { 119 dev_err(&pci->dev, "pci_enable_device failed\n"); 120 return -ENODEV; 121 } 122 123 ret = pci_request_regions(pci, "AMD ACP3x audio"); 124 if (ret < 0) { 125 dev_err(&pci->dev, "pci_request_regions failed\n"); 126 goto disable_pci; 127 } 128 129 adata = devm_kzalloc(&pci->dev, sizeof(struct acp3x_dev_data), 130 GFP_KERNEL); 131 if (!adata) { 132 ret = -ENOMEM; 133 goto release_regions; 134 } 135 136 /* check for msi interrupt support */ 137 ret = pci_enable_msi(pci); 138 if (ret) 139 /* msi is not enabled */ 140 irqflags = IRQF_SHARED; 141 else 142 /* msi is enabled */ 143 irqflags = 0; 144 145 addr = pci_resource_start(pci, 0); 146 adata->acp3x_base = devm_ioremap(&pci->dev, addr, 147 pci_resource_len(pci, 0)); 148 if (!adata->acp3x_base) { 149 ret = -ENOMEM; 150 goto disable_msi; 151 } 152 pci_set_master(pci); 153 pci_set_drvdata(pci, adata); 154 ret = acp3x_init(adata->acp3x_base); 155 if (ret) 156 goto disable_msi; 157 158 val = rv_readl(adata->acp3x_base + mmACP_I2S_PIN_CONFIG); 159 switch (val) { 160 case I2S_MODE: 161 adata->res = devm_kzalloc(&pci->dev, 162 sizeof(struct resource) * 4, 163 GFP_KERNEL); 164 if (!adata->res) { 165 ret = -ENOMEM; 166 goto de_init; 167 } 168 169 adata->res[0].name = "acp3x_i2s_iomem"; 170 adata->res[0].flags = IORESOURCE_MEM; 171 adata->res[0].start = addr; 172 adata->res[0].end = addr + (ACP3x_REG_END - ACP3x_REG_START); 173 174 adata->res[1].name = "acp3x_i2s_sp"; 175 adata->res[1].flags = IORESOURCE_MEM; 176 adata->res[1].start = addr + ACP3x_I2STDM_REG_START; 177 adata->res[1].end = addr + ACP3x_I2STDM_REG_END; 178 179 adata->res[2].name = "acp3x_i2s_bt"; 180 adata->res[2].flags = IORESOURCE_MEM; 181 adata->res[2].start = addr + ACP3x_BT_TDM_REG_START; 182 adata->res[2].end = addr + ACP3x_BT_TDM_REG_END; 183 184 adata->res[3].name = "acp3x_i2s_irq"; 185 adata->res[3].flags = IORESOURCE_IRQ; 186 adata->res[3].start = pci->irq; 187 adata->res[3].end = adata->res[3].start; 188 189 adata->acp3x_audio_mode = ACP3x_I2S_MODE; 190 191 memset(&pdevinfo, 0, sizeof(pdevinfo)); 192 pdevinfo[0].name = "acp3x_rv_i2s_dma"; 193 pdevinfo[0].id = 0; 194 pdevinfo[0].parent = &pci->dev; 195 pdevinfo[0].num_res = 4; 196 pdevinfo[0].res = &adata->res[0]; 197 pdevinfo[0].data = &irqflags; 198 pdevinfo[0].size_data = sizeof(irqflags); 199 200 pdevinfo[1].name = "acp3x_i2s_playcap"; 201 pdevinfo[1].id = 0; 202 pdevinfo[1].parent = &pci->dev; 203 pdevinfo[1].num_res = 1; 204 pdevinfo[1].res = &adata->res[1]; 205 206 pdevinfo[2].name = "acp3x_i2s_playcap"; 207 pdevinfo[2].id = 1; 208 pdevinfo[2].parent = &pci->dev; 209 pdevinfo[2].num_res = 1; 210 pdevinfo[2].res = &adata->res[1]; 211 212 pdevinfo[3].name = "acp3x_i2s_playcap"; 213 pdevinfo[3].id = 2; 214 pdevinfo[3].parent = &pci->dev; 215 pdevinfo[3].num_res = 1; 216 pdevinfo[3].res = &adata->res[2]; 217 for (i = 0; i < ACP3x_DEVS; i++) { 218 adata->pdev[i] = 219 platform_device_register_full(&pdevinfo[i]); 220 if (IS_ERR(adata->pdev[i])) { 221 dev_err(&pci->dev, "cannot register %s device\n", 222 pdevinfo[i].name); 223 ret = PTR_ERR(adata->pdev[i]); 224 goto unregister_devs; 225 } 226 } 227 break; 228 default: 229 dev_err(&pci->dev, "Invalid ACP audio mode : %d\n", val); 230 ret = -ENODEV; 231 goto disable_msi; 232 } 233 pm_runtime_set_autosuspend_delay(&pci->dev, 2000); 234 pm_runtime_use_autosuspend(&pci->dev); 235 pm_runtime_set_active(&pci->dev); 236 pm_runtime_put_noidle(&pci->dev); 237 pm_runtime_enable(&pci->dev); 238 pm_runtime_allow(&pci->dev); 239 return 0; 240 241 unregister_devs: 242 if (val == I2S_MODE) 243 for (i = 0; i < ACP3x_DEVS; i++) 244 platform_device_unregister(adata->pdev[i]); 245 de_init: 246 if (acp3x_deinit(adata->acp3x_base)) 247 dev_err(&pci->dev, "ACP de-init failed\n"); 248 disable_msi: 249 pci_disable_msi(pci); 250 release_regions: 251 pci_release_regions(pci); 252 disable_pci: 253 pci_disable_device(pci); 254 255 return ret; 256 } 257 258 static int snd_acp3x_suspend(struct device *dev) 259 { 260 int ret; 261 struct acp3x_dev_data *adata; 262 263 adata = dev_get_drvdata(dev); 264 ret = acp3x_deinit(adata->acp3x_base); 265 if (ret) 266 dev_err(dev, "ACP de-init failed\n"); 267 else 268 dev_dbg(dev, "ACP de-initialized\n"); 269 270 return 0; 271 } 272 273 static int snd_acp3x_resume(struct device *dev) 274 { 275 int ret; 276 struct acp3x_dev_data *adata; 277 278 adata = dev_get_drvdata(dev); 279 ret = acp3x_init(adata->acp3x_base); 280 if (ret) { 281 dev_err(dev, "ACP init failed\n"); 282 return ret; 283 } 284 return 0; 285 } 286 287 static const struct dev_pm_ops acp3x_pm = { 288 .runtime_suspend = snd_acp3x_suspend, 289 .runtime_resume = snd_acp3x_resume, 290 .resume = snd_acp3x_resume, 291 }; 292 293 static void snd_acp3x_remove(struct pci_dev *pci) 294 { 295 struct acp3x_dev_data *adata; 296 int i, ret; 297 298 adata = pci_get_drvdata(pci); 299 if (adata->acp3x_audio_mode == ACP3x_I2S_MODE) { 300 for (i = 0; i < ACP3x_DEVS; i++) 301 platform_device_unregister(adata->pdev[i]); 302 } 303 ret = acp3x_deinit(adata->acp3x_base); 304 if (ret) 305 dev_err(&pci->dev, "ACP de-init failed\n"); 306 pm_runtime_disable(&pci->dev); 307 pm_runtime_get_noresume(&pci->dev); 308 pci_disable_msi(pci); 309 pci_release_regions(pci); 310 pci_disable_device(pci); 311 } 312 313 static const struct pci_device_id snd_acp3x_ids[] = { 314 { PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x15e2), 315 .class = PCI_CLASS_MULTIMEDIA_OTHER << 8, 316 .class_mask = 0xffffff }, 317 { 0, }, 318 }; 319 MODULE_DEVICE_TABLE(pci, snd_acp3x_ids); 320 321 static struct pci_driver acp3x_driver = { 322 .name = KBUILD_MODNAME, 323 .id_table = snd_acp3x_ids, 324 .probe = snd_acp3x_probe, 325 .remove = snd_acp3x_remove, 326 .driver = { 327 .pm = &acp3x_pm, 328 } 329 }; 330 331 module_pci_driver(acp3x_driver); 332 333 MODULE_AUTHOR("Vishnuvardhanrao.Ravulapati@amd.com"); 334 MODULE_AUTHOR("Maruthi.Bayyavarapu@amd.com"); 335 MODULE_DESCRIPTION("AMD ACP3x PCI driver"); 336 MODULE_LICENSE("GPL v2"); 337