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1// SPDX-License-Identifier: GPL-2.0+2/*3 * AMD Yellow Carp ACP PCI Driver4 *5 * Copyright 2021 Advanced Micro Devices, Inc.6 */7 8#include <linux/pci.h>9#include <linux/module.h>10#include <linux/io.h>11#include <linux/delay.h>12#include <linux/platform_device.h>13#include <linux/interrupt.h>14#include <sound/pcm_params.h>15#include <linux/pm_runtime.h>16 17#include "acp6x.h"18 19struct acp6x_dev_data {20 void __iomem *acp6x_base;21 struct resource *res;22 bool acp6x_audio_mode;23 struct platform_device *pdev[ACP6x_DEVS];24};25 26static int acp6x_power_on(void __iomem *acp_base)27{28 u32 val;29 int timeout;30 31 val = acp6x_readl(acp_base + ACP_PGFSM_STATUS);32 33 if (!val)34 return val;35 36 if ((val & ACP_PGFSM_STATUS_MASK) != ACP_POWER_ON_IN_PROGRESS)37 acp6x_writel(ACP_PGFSM_CNTL_POWER_ON_MASK, acp_base + ACP_PGFSM_CONTROL);38 timeout = 0;39 while (++timeout < 500) {40 val = acp6x_readl(acp_base + ACP_PGFSM_STATUS);41 if (!val)42 return 0;43 udelay(1);44 }45 return -ETIMEDOUT;46}47 48static int acp6x_reset(void __iomem *acp_base)49{50 u32 val;51 int timeout;52 53 acp6x_writel(1, acp_base + ACP_SOFT_RESET);54 timeout = 0;55 while (++timeout < 500) {56 val = acp6x_readl(acp_base + ACP_SOFT_RESET);57 if (val & ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK)58 break;59 cpu_relax();60 }61 acp6x_writel(0, acp_base + ACP_SOFT_RESET);62 timeout = 0;63 while (++timeout < 500) {64 val = acp6x_readl(acp_base + ACP_SOFT_RESET);65 if (!val)66 return 0;67 cpu_relax();68 }69 return -ETIMEDOUT;70}71 72static void acp6x_enable_interrupts(void __iomem *acp_base)73{74 acp6x_writel(0x01, acp_base + ACP_EXTERNAL_INTR_ENB);75}76 77static void acp6x_disable_interrupts(void __iomem *acp_base)78{79 acp6x_writel(ACP_EXT_INTR_STAT_CLEAR_MASK, acp_base +80 ACP_EXTERNAL_INTR_STAT);81 acp6x_writel(0x00, acp_base + ACP_EXTERNAL_INTR_CNTL);82 acp6x_writel(0x00, acp_base + ACP_EXTERNAL_INTR_ENB);83}84 85static int acp6x_init(void __iomem *acp_base)86{87 int ret;88 89 /* power on */90 ret = acp6x_power_on(acp_base);91 if (ret) {92 pr_err("ACP power on failed\n");93 return ret;94 }95 acp6x_writel(0x01, acp_base + ACP_CONTROL);96 /* Reset */97 ret = acp6x_reset(acp_base);98 if (ret) {99 pr_err("ACP reset failed\n");100 return ret;101 }102 acp6x_writel(0x03, acp_base + ACP_CLKMUX_SEL);103 acp6x_enable_interrupts(acp_base);104 return 0;105}106 107static int acp6x_deinit(void __iomem *acp_base)108{109 int ret;110 111 acp6x_disable_interrupts(acp_base);112 /* Reset */113 ret = acp6x_reset(acp_base);114 if (ret) {115 pr_err("ACP reset failed\n");116 return ret;117 }118 acp6x_writel(0x00, acp_base + ACP_CLKMUX_SEL);119 acp6x_writel(0x00, acp_base + ACP_CONTROL);120 return 0;121}122 123static irqreturn_t acp6x_irq_handler(int irq, void *dev_id)124{125 struct acp6x_dev_data *adata;126 struct pdm_dev_data *yc_pdm_data;127 u32 val;128 129 adata = dev_id;130 if (!adata)131 return IRQ_NONE;132 133 val = acp6x_readl(adata->acp6x_base + ACP_EXTERNAL_INTR_STAT);134 if (val & BIT(PDM_DMA_STAT)) {135 yc_pdm_data = dev_get_drvdata(&adata->pdev[0]->dev);136 acp6x_writel(BIT(PDM_DMA_STAT), adata->acp6x_base + ACP_EXTERNAL_INTR_STAT);137 if (yc_pdm_data->capture_stream)138 snd_pcm_period_elapsed(yc_pdm_data->capture_stream);139 return IRQ_HANDLED;140 }141 return IRQ_NONE;142}143 144static int snd_acp6x_probe(struct pci_dev *pci,145 const struct pci_device_id *pci_id)146{147 struct acp6x_dev_data *adata;148 struct platform_device_info pdevinfo[ACP6x_DEVS];149 int index = 0;150 int val = 0x00;151 u32 addr;152 unsigned int irqflags, flag;153 int ret;154 155 irqflags = IRQF_SHARED;156 157 /* Return if acp config flag is defined */158 flag = snd_amd_acp_find_config(pci);159 if (flag)160 return -ENODEV;161 162 /* Yellow Carp device check */163 switch (pci->revision) {164 case 0x60:165 case 0x6f:166 break;167 default:168 dev_dbg(&pci->dev, "acp6x pci device not found\n");169 return -ENODEV;170 }171 if (pci_enable_device(pci)) {172 dev_err(&pci->dev, "pci_enable_device failed\n");173 return -ENODEV;174 }175 176 ret = pci_request_regions(pci, "AMD ACP3x audio");177 if (ret < 0) {178 dev_err(&pci->dev, "pci_request_regions failed\n");179 goto disable_pci;180 }181 182 adata = devm_kzalloc(&pci->dev, sizeof(struct acp6x_dev_data),183 GFP_KERNEL);184 if (!adata) {185 ret = -ENOMEM;186 goto release_regions;187 }188 189 addr = pci_resource_start(pci, 0);190 adata->acp6x_base = devm_ioremap(&pci->dev, addr,191 pci_resource_len(pci, 0));192 if (!adata->acp6x_base) {193 ret = -ENOMEM;194 goto release_regions;195 }196 pci_set_master(pci);197 pci_set_drvdata(pci, adata);198 ret = acp6x_init(adata->acp6x_base);199 if (ret)200 goto release_regions;201 val = acp6x_readl(adata->acp6x_base + ACP_PIN_CONFIG);202 switch (val) {203 case ACP_CONFIG_0:204 case ACP_CONFIG_1:205 case ACP_CONFIG_2:206 case ACP_CONFIG_3:207 case ACP_CONFIG_9:208 case ACP_CONFIG_15:209 dev_info(&pci->dev, "Audio Mode %d\n", val);210 break;211 default:212 adata->res = devm_kzalloc(&pci->dev,213 sizeof(struct resource),214 GFP_KERNEL);215 if (!adata->res) {216 ret = -ENOMEM;217 goto de_init;218 }219 220 adata->res->name = "acp_iomem";221 adata->res->flags = IORESOURCE_MEM;222 adata->res->start = addr;223 adata->res->end = addr + (ACP6x_REG_END - ACP6x_REG_START);224 225 adata->acp6x_audio_mode = ACP6x_PDM_MODE;226 227 memset(&pdevinfo, 0, sizeof(pdevinfo));228 pdevinfo[0].name = "acp_yc_pdm_dma";229 pdevinfo[0].id = 0;230 pdevinfo[0].parent = &pci->dev;231 pdevinfo[0].num_res = 1;232 pdevinfo[0].res = adata->res;233 234 pdevinfo[1].name = "dmic-codec";235 pdevinfo[1].id = 0;236 pdevinfo[1].parent = &pci->dev;237 238 pdevinfo[2].name = "acp_yc_mach";239 pdevinfo[2].id = 0;240 pdevinfo[2].parent = &pci->dev;241 242 for (index = 0; index < ACP6x_DEVS; index++) {243 adata->pdev[index] =244 platform_device_register_full(&pdevinfo[index]);245 if (IS_ERR(adata->pdev[index])) {246 dev_err(&pci->dev, "cannot register %s device\n",247 pdevinfo[index].name);248 ret = PTR_ERR(adata->pdev[index]);249 goto unregister_devs;250 }251 }252 break;253 }254 ret = devm_request_irq(&pci->dev, pci->irq, acp6x_irq_handler,255 irqflags, "ACP_PCI_IRQ", adata);256 if (ret) {257 dev_err(&pci->dev, "ACP PCI IRQ request failed\n");258 goto unregister_devs;259 }260 pm_runtime_set_autosuspend_delay(&pci->dev, ACP_SUSPEND_DELAY_MS);261 pm_runtime_use_autosuspend(&pci->dev);262 pm_runtime_put_noidle(&pci->dev);263 pm_runtime_allow(&pci->dev);264 265 return 0;266unregister_devs:267 for (--index; index >= 0; index--)268 platform_device_unregister(adata->pdev[index]);269de_init:270 if (acp6x_deinit(adata->acp6x_base))271 dev_err(&pci->dev, "ACP de-init failed\n");272release_regions:273 pci_release_regions(pci);274disable_pci:275 pci_disable_device(pci);276 277 return ret;278}279 280static int __maybe_unused snd_acp6x_suspend(struct device *dev)281{282 struct acp6x_dev_data *adata;283 int ret;284 285 adata = dev_get_drvdata(dev);286 ret = acp6x_deinit(adata->acp6x_base);287 if (ret)288 dev_err(dev, "ACP de-init failed\n");289 return ret;290}291 292static int __maybe_unused snd_acp6x_resume(struct device *dev)293{294 struct acp6x_dev_data *adata;295 int ret;296 297 adata = dev_get_drvdata(dev);298 ret = acp6x_init(adata->acp6x_base);299 if (ret)300 dev_err(dev, "ACP init failed\n");301 return ret;302}303 304static const struct dev_pm_ops acp6x_pm = {305 SET_RUNTIME_PM_OPS(snd_acp6x_suspend, snd_acp6x_resume, NULL)306 SET_SYSTEM_SLEEP_PM_OPS(snd_acp6x_suspend, snd_acp6x_resume)307};308 309static void snd_acp6x_remove(struct pci_dev *pci)310{311 struct acp6x_dev_data *adata;312 int ret, index;313 314 adata = pci_get_drvdata(pci);315 if (adata->acp6x_audio_mode == ACP6x_PDM_MODE) {316 for (index = 0; index < ACP6x_DEVS; index++)317 platform_device_unregister(adata->pdev[index]);318 }319 ret = acp6x_deinit(adata->acp6x_base);320 if (ret)321 dev_err(&pci->dev, "ACP de-init failed\n");322 pm_runtime_forbid(&pci->dev);323 pm_runtime_get_noresume(&pci->dev);324 pci_release_regions(pci);325 pci_disable_device(pci);326}327 328static const struct pci_device_id snd_acp6x_ids[] = {329 { PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_DEVICE_ID),330 .class = PCI_CLASS_MULTIMEDIA_OTHER << 8,331 .class_mask = 0xffffff },332 { 0, },333};334MODULE_DEVICE_TABLE(pci, snd_acp6x_ids);335 336static struct pci_driver yc_acp6x_driver = {337 .name = KBUILD_MODNAME,338 .id_table = snd_acp6x_ids,339 .probe = snd_acp6x_probe,340 .remove = snd_acp6x_remove,341 .driver = {342 .pm = &acp6x_pm,343 }344};345 346module_pci_driver(yc_acp6x_driver);347 348MODULE_AUTHOR("Vijendar.Mukunda@amd.com");349MODULE_DESCRIPTION("AMD ACP Yellow Carp PCI driver");350MODULE_LICENSE("GPL v2");351