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 17struct 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 25static 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 55static 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 79static void acp3x_enable_interrupts(void __iomem *acp_base) 80{ 81 rv_writel(0x01, acp_base + mmACP_EXTERNAL_INTR_ENB); 82} 83 84static 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 92static 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 113static 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 127static 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 /* check for msi interrupt support */ 159 ret = pci_enable_msi(pci); 160 if (ret) 161 /* msi is not enabled */ 162 irqflags = IRQF_SHARED; 163 else 164 /* msi is enabled */ 165 irqflags = 0; 166 167 addr = pci_resource_start(pci, 0); 168 adata->acp3x_base = devm_ioremap(&pci->dev, addr, 169 pci_resource_len(pci, 0)); 170 if (!adata->acp3x_base) { 171 ret = -ENOMEM; 172 goto disable_msi; 173 } 174 pci_set_master(pci); 175 pci_set_drvdata(pci, adata); 176 /* Save ACP_PME_EN state */ 177 adata->pme_en = rv_readl(adata->acp3x_base + mmACP_PME_EN); 178 ret = acp3x_init(adata); 179 if (ret) 180 goto disable_msi; 181 182 val = rv_readl(adata->acp3x_base + mmACP_I2S_PIN_CONFIG); 183 switch (val) { 184 case I2S_MODE: 185 adata->res = devm_kzalloc(&pci->dev, 186 sizeof(struct resource) * 4, 187 GFP_KERNEL); 188 if (!adata->res) { 189 ret = -ENOMEM; 190 goto de_init; 191 } 192 193 adata->res[0].name = "acp3x_i2s_iomem"; 194 adata->res[0].flags = IORESOURCE_MEM; 195 adata->res[0].start = addr; 196 adata->res[0].end = addr + (ACP3x_REG_END - ACP3x_REG_START); 197 198 adata->res[1].name = "acp3x_i2s_sp"; 199 adata->res[1].flags = IORESOURCE_MEM; 200 adata->res[1].start = addr + ACP3x_I2STDM_REG_START; 201 adata->res[1].end = addr + ACP3x_I2STDM_REG_END; 202 203 adata->res[2].name = "acp3x_i2s_bt"; 204 adata->res[2].flags = IORESOURCE_MEM; 205 adata->res[2].start = addr + ACP3x_BT_TDM_REG_START; 206 adata->res[2].end = addr + ACP3x_BT_TDM_REG_END; 207 208 adata->res[3].name = "acp3x_i2s_irq"; 209 adata->res[3].flags = IORESOURCE_IRQ; 210 adata->res[3].start = pci->irq; 211 adata->res[3].end = adata->res[3].start; 212 213 adata->acp3x_audio_mode = ACP3x_I2S_MODE; 214 215 memset(&pdevinfo, 0, sizeof(pdevinfo)); 216 pdevinfo[0].name = "acp3x_rv_i2s_dma"; 217 pdevinfo[0].id = 0; 218 pdevinfo[0].parent = &pci->dev; 219 pdevinfo[0].num_res = 4; 220 pdevinfo[0].res = &adata->res[0]; 221 pdevinfo[0].data = &irqflags; 222 pdevinfo[0].size_data = sizeof(irqflags); 223 224 pdevinfo[1].name = "acp3x_i2s_playcap"; 225 pdevinfo[1].id = 0; 226 pdevinfo[1].parent = &pci->dev; 227 pdevinfo[1].num_res = 1; 228 pdevinfo[1].res = &adata->res[1]; 229 230 pdevinfo[2].name = "acp3x_i2s_playcap"; 231 pdevinfo[2].id = 1; 232 pdevinfo[2].parent = &pci->dev; 233 pdevinfo[2].num_res = 1; 234 pdevinfo[2].res = &adata->res[1]; 235 236 pdevinfo[3].name = "acp3x_i2s_playcap"; 237 pdevinfo[3].id = 2; 238 pdevinfo[3].parent = &pci->dev; 239 pdevinfo[3].num_res = 1; 240 pdevinfo[3].res = &adata->res[2]; 241 for (i = 0; i < ACP3x_DEVS; i++) { 242 adata->pdev[i] = 243 platform_device_register_full(&pdevinfo[i]); 244 if (IS_ERR(adata->pdev[i])) { 245 dev_err(&pci->dev, "cannot register %s device\n", 246 pdevinfo[i].name); 247 ret = PTR_ERR(adata->pdev[i]); 248 goto unregister_devs; 249 } 250 } 251 break; 252 default: 253 dev_err(&pci->dev, "Invalid ACP audio mode : %d\n", val); 254 ret = -ENODEV; 255 goto disable_msi; 256 } 257 pm_runtime_set_autosuspend_delay(&pci->dev, 2000); 258 pm_runtime_use_autosuspend(&pci->dev); 259 pm_runtime_put_noidle(&pci->dev); 260 pm_runtime_allow(&pci->dev); 261 return 0; 262 263unregister_devs: 264 if (val == I2S_MODE) 265 for (i = 0; i < ACP3x_DEVS; i++) 266 platform_device_unregister(adata->pdev[i]); 267de_init: 268 if (acp3x_deinit(adata->acp3x_base)) 269 dev_err(&pci->dev, "ACP de-init failed\n"); 270disable_msi: 271 pci_disable_msi(pci); 272release_regions: 273 pci_release_regions(pci); 274disable_pci: 275 pci_disable_device(pci); 276 277 return ret; 278} 279 280static int snd_acp3x_suspend(struct device *dev) 281{ 282 int ret; 283 struct acp3x_dev_data *adata; 284 285 adata = dev_get_drvdata(dev); 286 ret = acp3x_deinit(adata->acp3x_base); 287 if (ret) 288 dev_err(dev, "ACP de-init failed\n"); 289 else 290 dev_dbg(dev, "ACP de-initialized\n"); 291 292 return 0; 293} 294 295static int snd_acp3x_resume(struct device *dev) 296{ 297 int ret; 298 struct acp3x_dev_data *adata; 299 300 adata = dev_get_drvdata(dev); 301 ret = acp3x_init(adata); 302 if (ret) { 303 dev_err(dev, "ACP init failed\n"); 304 return ret; 305 } 306 return 0; 307} 308 309static const struct dev_pm_ops acp3x_pm = { 310 .runtime_suspend = snd_acp3x_suspend, 311 .runtime_resume = snd_acp3x_resume, 312 .resume = snd_acp3x_resume, 313}; 314 315static void snd_acp3x_remove(struct pci_dev *pci) 316{ 317 struct acp3x_dev_data *adata; 318 int i, ret; 319 320 adata = pci_get_drvdata(pci); 321 if (adata->acp3x_audio_mode == ACP3x_I2S_MODE) { 322 for (i = 0; i < ACP3x_DEVS; i++) 323 platform_device_unregister(adata->pdev[i]); 324 } 325 ret = acp3x_deinit(adata->acp3x_base); 326 if (ret) 327 dev_err(&pci->dev, "ACP de-init failed\n"); 328 pm_runtime_forbid(&pci->dev); 329 pm_runtime_get_noresume(&pci->dev); 330 pci_disable_msi(pci); 331 pci_release_regions(pci); 332 pci_disable_device(pci); 333} 334 335static const struct pci_device_id snd_acp3x_ids[] = { 336 { PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x15e2), 337 .class = PCI_CLASS_MULTIMEDIA_OTHER << 8, 338 .class_mask = 0xffffff }, 339 { 0, }, 340}; 341MODULE_DEVICE_TABLE(pci, snd_acp3x_ids); 342 343static struct pci_driver acp3x_driver = { 344 .name = KBUILD_MODNAME, 345 .id_table = snd_acp3x_ids, 346 .probe = snd_acp3x_probe, 347 .remove = snd_acp3x_remove, 348 .driver = { 349 .pm = &acp3x_pm, 350 } 351}; 352 353module_pci_driver(acp3x_driver); 354 355MODULE_AUTHOR("Vishnuvardhanrao.Ravulapati@amd.com"); 356MODULE_AUTHOR("Maruthi.Bayyavarapu@amd.com"); 357MODULE_DESCRIPTION("AMD ACP3x PCI driver"); 358MODULE_LICENSE("GPL v2"); 359