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1// SPDX-License-Identifier: GPL-2.0+2//3// AMD ACP PCI Driver4//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 state46 */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 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 255unregister_devs:256 if (val == I2S_MODE)257 for (i = 0; i < ACP3x_DEVS; i++)258 platform_device_unregister(adata->pdev[i]);259de_init:260 if (acp3x_deinit(adata->acp3x_base))261 dev_err(&pci->dev, "ACP de-init failed\n");262release_regions:263 pci_release_regions(pci);264disable_pci:265 pci_disable_device(pci);266 267 return ret;268}269 270static 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 else280 dev_dbg(dev, "ACP de-initialized\n");281 282 return 0;283}284 285static 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 299static 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 305static 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 324static 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};330MODULE_DEVICE_TABLE(pci, snd_acp3x_ids);331 332static 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 342module_pci_driver(acp3x_driver);343 344MODULE_AUTHOR("Vishnuvardhanrao.Ravulapati@amd.com");345MODULE_AUTHOR("Maruthi.Bayyavarapu@amd.com");346MODULE_DESCRIPTION("AMD ACP3x PCI driver");347MODULE_LICENSE("GPL v2");348