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 u32 pme_en; 23 }; 24 acp3x_power_on(struct acp3x_dev_data * adata)25 static int acp3x_power_on(struct acp3x_dev_data *adata) 26 { 27 void __iomem *acp3x_base = adata->acp3x_base; 28 u32 val; 29 int timeout; 30 31 val = rv_readl(acp3x_base + mmACP_PGFSM_STATUS); 32 33 if (val == 0) 34 return val; 35 36 if (!((val & ACP_PGFSM_STATUS_MASK) == 37 ACP_POWER_ON_IN_PROGRESS)) 38 rv_writel(ACP_PGFSM_CNTL_POWER_ON_MASK, 39 acp3x_base + mmACP_PGFSM_CONTROL); 40 timeout = 0; 41 while (++timeout < 500) { 42 val = rv_readl(acp3x_base + mmACP_PGFSM_STATUS); 43 if (!val) { 44 /* ACP power On clears PME_EN. 45 * Restore the value to its prior state 46 */ 47 rv_writel(adata->pme_en, acp3x_base + mmACP_PME_EN); 48 return 0; 49 } 50 udelay(1); 51 } 52 return -ETIMEDOUT; 53 } 54 acp3x_reset(void __iomem * acp3x_base)55 static int acp3x_reset(void __iomem *acp3x_base) 56 { 57 u32 val; 58 int timeout; 59 60 rv_writel(1, acp3x_base + mmACP_SOFT_RESET); 61 timeout = 0; 62 while (++timeout < 500) { 63 val = rv_readl(acp3x_base + mmACP_SOFT_RESET); 64 if (val & ACP3x_SOFT_RESET__SoftResetAudDone_MASK) 65 break; 66 cpu_relax(); 67 } 68 rv_writel(0, acp3x_base + mmACP_SOFT_RESET); 69 timeout = 0; 70 while (++timeout < 500) { 71 val = rv_readl(acp3x_base + mmACP_SOFT_RESET); 72 if (!val) 73 return 0; 74 cpu_relax(); 75 } 76 return -ETIMEDOUT; 77 } 78 acp3x_enable_interrupts(void __iomem * acp_base)79 static void acp3x_enable_interrupts(void __iomem *acp_base) 80 { 81 rv_writel(0x01, acp_base + mmACP_EXTERNAL_INTR_ENB); 82 } 83 acp3x_disable_interrupts(void __iomem * acp_base)84 static void acp3x_disable_interrupts(void __iomem *acp_base) 85 { 86 rv_writel(ACP_EXT_INTR_STAT_CLEAR_MASK, acp_base + 87 mmACP_EXTERNAL_INTR_STAT); 88 rv_writel(0x00, acp_base + mmACP_EXTERNAL_INTR_CNTL); 89 rv_writel(0x00, acp_base + mmACP_EXTERNAL_INTR_ENB); 90 } 91 acp3x_init(struct acp3x_dev_data * adata)92 static int acp3x_init(struct acp3x_dev_data *adata) 93 { 94 void __iomem *acp3x_base = adata->acp3x_base; 95 int ret; 96 97 /* power on */ 98 ret = acp3x_power_on(adata); 99 if (ret) { 100 pr_err("ACP3x power on failed\n"); 101 return ret; 102 } 103 /* Reset */ 104 ret = acp3x_reset(acp3x_base); 105 if (ret) { 106 pr_err("ACP3x reset failed\n"); 107 return ret; 108 } 109 acp3x_enable_interrupts(acp3x_base); 110 return 0; 111 } 112 acp3x_deinit(void __iomem * acp3x_base)113 static int acp3x_deinit(void __iomem *acp3x_base) 114 { 115 int ret; 116 117 acp3x_disable_interrupts(acp3x_base); 118 /* Reset */ 119 ret = acp3x_reset(acp3x_base); 120 if (ret) { 121 pr_err("ACP3x reset failed\n"); 122 return ret; 123 } 124 return 0; 125 } 126 snd_acp3x_probe(struct pci_dev * pci,const struct pci_device_id * pci_id)127 static int snd_acp3x_probe(struct pci_dev *pci, 128 const struct pci_device_id *pci_id) 129 { 130 struct acp3x_dev_data *adata; 131 struct platform_device_info pdevinfo[ACP3x_DEVS]; 132 unsigned int irqflags; 133 int ret, i; 134 u32 addr, val; 135 136 /* Raven device detection */ 137 if (pci->revision != 0x00) 138 return -ENODEV; 139 140 if (pci_enable_device(pci)) { 141 dev_err(&pci->dev, "pci_enable_device failed\n"); 142 return -ENODEV; 143 } 144 145 ret = pci_request_regions(pci, "AMD ACP3x audio"); 146 if (ret < 0) { 147 dev_err(&pci->dev, "pci_request_regions failed\n"); 148 goto disable_pci; 149 } 150 151 adata = devm_kzalloc(&pci->dev, sizeof(struct acp3x_dev_data), 152 GFP_KERNEL); 153 if (!adata) { 154 ret = -ENOMEM; 155 goto release_regions; 156 } 157 158 irqflags = IRQF_SHARED; 159 160 addr = pci_resource_start(pci, 0); 161 adata->acp3x_base = devm_ioremap(&pci->dev, addr, 162 pci_resource_len(pci, 0)); 163 if (!adata->acp3x_base) { 164 ret = -ENOMEM; 165 goto release_regions; 166 } 167 pci_set_master(pci); 168 pci_set_drvdata(pci, adata); 169 /* Save ACP_PME_EN state */ 170 adata->pme_en = rv_readl(adata->acp3x_base + mmACP_PME_EN); 171 ret = acp3x_init(adata); 172 if (ret) 173 goto release_regions; 174 175 val = rv_readl(adata->acp3x_base + mmACP_I2S_PIN_CONFIG); 176 switch (val) { 177 case I2S_MODE: 178 adata->res = devm_kzalloc(&pci->dev, 179 sizeof(struct resource) * 4, 180 GFP_KERNEL); 181 if (!adata->res) { 182 ret = -ENOMEM; 183 goto de_init; 184 } 185 186 adata->res[0].name = "acp3x_i2s_iomem"; 187 adata->res[0].flags = IORESOURCE_MEM; 188 adata->res[0].start = addr; 189 adata->res[0].end = addr + (ACP3x_REG_END - ACP3x_REG_START); 190 191 adata->res[1].name = "acp3x_i2s_sp"; 192 adata->res[1].flags = IORESOURCE_MEM; 193 adata->res[1].start = addr + ACP3x_I2STDM_REG_START; 194 adata->res[1].end = addr + ACP3x_I2STDM_REG_END; 195 196 adata->res[2].name = "acp3x_i2s_bt"; 197 adata->res[2].flags = IORESOURCE_MEM; 198 adata->res[2].start = addr + ACP3x_BT_TDM_REG_START; 199 adata->res[2].end = addr + ACP3x_BT_TDM_REG_END; 200 201 adata->res[3].name = "acp3x_i2s_irq"; 202 adata->res[3].flags = IORESOURCE_IRQ; 203 adata->res[3].start = pci->irq; 204 adata->res[3].end = adata->res[3].start; 205 206 adata->acp3x_audio_mode = ACP3x_I2S_MODE; 207 208 memset(&pdevinfo, 0, sizeof(pdevinfo)); 209 pdevinfo[0].name = "acp3x_rv_i2s_dma"; 210 pdevinfo[0].id = 0; 211 pdevinfo[0].parent = &pci->dev; 212 pdevinfo[0].num_res = 4; 213 pdevinfo[0].res = &adata->res[0]; 214 pdevinfo[0].data = &irqflags; 215 pdevinfo[0].size_data = sizeof(irqflags); 216 217 pdevinfo[1].name = "acp3x_i2s_playcap"; 218 pdevinfo[1].id = 0; 219 pdevinfo[1].parent = &pci->dev; 220 pdevinfo[1].num_res = 1; 221 pdevinfo[1].res = &adata->res[1]; 222 223 pdevinfo[2].name = "acp3x_i2s_playcap"; 224 pdevinfo[2].id = 1; 225 pdevinfo[2].parent = &pci->dev; 226 pdevinfo[2].num_res = 1; 227 pdevinfo[2].res = &adata->res[1]; 228 229 pdevinfo[3].name = "acp3x_i2s_playcap"; 230 pdevinfo[3].id = 2; 231 pdevinfo[3].parent = &pci->dev; 232 pdevinfo[3].num_res = 1; 233 pdevinfo[3].res = &adata->res[2]; 234 for (i = 0; i < ACP3x_DEVS; i++) { 235 adata->pdev[i] = 236 platform_device_register_full(&pdevinfo[i]); 237 if (IS_ERR(adata->pdev[i])) { 238 dev_err(&pci->dev, "cannot register %s device\n", 239 pdevinfo[i].name); 240 ret = PTR_ERR(adata->pdev[i]); 241 goto unregister_devs; 242 } 243 } 244 break; 245 default: 246 dev_info(&pci->dev, "ACP audio mode : %d\n", val); 247 break; 248 } 249 pm_runtime_set_autosuspend_delay(&pci->dev, 2000); 250 pm_runtime_use_autosuspend(&pci->dev); 251 pm_runtime_put_noidle(&pci->dev); 252 pm_runtime_allow(&pci->dev); 253 return 0; 254 255 unregister_devs: 256 if (val == I2S_MODE) 257 for (i = 0; i < ACP3x_DEVS; i++) 258 platform_device_unregister(adata->pdev[i]); 259 de_init: 260 if (acp3x_deinit(adata->acp3x_base)) 261 dev_err(&pci->dev, "ACP de-init failed\n"); 262 release_regions: 263 pci_release_regions(pci); 264 disable_pci: 265 pci_disable_device(pci); 266 267 return ret; 268 } 269 snd_acp3x_suspend(struct device * dev)270 static int snd_acp3x_suspend(struct device *dev) 271 { 272 int ret; 273 struct acp3x_dev_data *adata; 274 275 adata = dev_get_drvdata(dev); 276 ret = acp3x_deinit(adata->acp3x_base); 277 if (ret) 278 dev_err(dev, "ACP de-init failed\n"); 279 else 280 dev_dbg(dev, "ACP de-initialized\n"); 281 282 return 0; 283 } 284 snd_acp3x_resume(struct device * dev)285 static int snd_acp3x_resume(struct device *dev) 286 { 287 int ret; 288 struct acp3x_dev_data *adata; 289 290 adata = dev_get_drvdata(dev); 291 ret = acp3x_init(adata); 292 if (ret) { 293 dev_err(dev, "ACP init failed\n"); 294 return ret; 295 } 296 return 0; 297 } 298 299 static const struct dev_pm_ops acp3x_pm = { 300 .runtime_suspend = snd_acp3x_suspend, 301 .runtime_resume = snd_acp3x_resume, 302 .resume = snd_acp3x_resume, 303 }; 304 snd_acp3x_remove(struct pci_dev * pci)305 static void snd_acp3x_remove(struct pci_dev *pci) 306 { 307 struct acp3x_dev_data *adata; 308 int i, ret; 309 310 adata = pci_get_drvdata(pci); 311 if (adata->acp3x_audio_mode == ACP3x_I2S_MODE) { 312 for (i = 0; i < ACP3x_DEVS; i++) 313 platform_device_unregister(adata->pdev[i]); 314 } 315 ret = acp3x_deinit(adata->acp3x_base); 316 if (ret) 317 dev_err(&pci->dev, "ACP de-init failed\n"); 318 pm_runtime_forbid(&pci->dev); 319 pm_runtime_get_noresume(&pci->dev); 320 pci_release_regions(pci); 321 pci_disable_device(pci); 322 } 323 324 static const struct pci_device_id snd_acp3x_ids[] = { 325 { PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x15e2), 326 .class = PCI_CLASS_MULTIMEDIA_OTHER << 8, 327 .class_mask = 0xffffff }, 328 { 0, }, 329 }; 330 MODULE_DEVICE_TABLE(pci, snd_acp3x_ids); 331 332 static struct pci_driver acp3x_driver = { 333 .name = KBUILD_MODNAME, 334 .id_table = snd_acp3x_ids, 335 .probe = snd_acp3x_probe, 336 .remove = snd_acp3x_remove, 337 .driver = { 338 .pm = &acp3x_pm, 339 } 340 }; 341 342 module_pci_driver(acp3x_driver); 343 344 MODULE_AUTHOR("Vishnuvardhanrao.Ravulapati@amd.com"); 345 MODULE_AUTHOR("Maruthi.Bayyavarapu@amd.com"); 346 MODULE_DESCRIPTION("AMD ACP3x PCI driver"); 347 MODULE_LICENSE("GPL v2"); 348