sound/soc/amd/vangogh/pci-acp5x.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 //
   3 // AMD Vangogh ACP PCI Driver
   4 //
   5 // Copyright (C) 2021 Advanced Micro Devices, Inc. All rights reserved.
   6
   7 #include <linux/pci.h>
   8 #include <linux/module.h>
   9 #include <linux/io.h>
  10 #include <linux/delay.h>
  11 #include <linux/platform_device.h>
  12 #include <linux/interrupt.h>
  13 #include <linux/pm_runtime.h>
  14
  15 #include "acp5x.h"
  16
  17 struct acp5x_dev_data {
  18         void __iomem *acp5x_base;
  19         bool acp5x_audio_mode;
  20         struct resource *res;
  21         struct platform_device *pdev[ACP5x_DEVS];
  22 };
  23
  24 static int acp5x_power_on(void __iomem *acp5x_base)
  25 {
  26         u32 val;
  27         int timeout;
  28
  29         val = acp_readl(acp5x_base + ACP_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                 acp_writel(ACP_PGFSM_CNTL_POWER_ON_MASK,
  37                            acp5x_base + ACP_PGFSM_CONTROL);
  38         timeout = 0;
  39         while (++timeout < 500) {
  40                 val = acp_readl(acp5x_base + ACP_PGFSM_STATUS);
  41                 if ((val & ACP_PGFSM_STATUS_MASK) == ACP_POWERED_ON)
  42                         return 0;
  43                 udelay(1);
  44         }
  45         return -ETIMEDOUT;
  46 }
  47
  48 static int acp5x_reset(void __iomem *acp5x_base)
  49 {
  50         u32 val;
  51         int timeout;
  52
  53         acp_writel(1, acp5x_base + ACP_SOFT_RESET);
  54         timeout = 0;
  55         while (++timeout < 500) {
  56                 val = acp_readl(acp5x_base + ACP_SOFT_RESET);
  57                 if (val & ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK)
  58                         break;
  59                 cpu_relax();
  60         }
  61         acp_writel(0, acp5x_base + ACP_SOFT_RESET);
  62         timeout = 0;
  63         while (++timeout < 500) {
  64                 val = acp_readl(acp5x_base + ACP_SOFT_RESET);
  65                 if (!val)
  66                         return 0;
  67                 cpu_relax();
  68         }
  69         return -ETIMEDOUT;
  70 }
  71
  72 static void acp5x_enable_interrupts(void __iomem *acp5x_base)
  73 {
  74         acp_writel(0x01, acp5x_base + ACP_EXTERNAL_INTR_ENB);
  75 }
  76
  77 static void acp5x_disable_interrupts(void __iomem *acp5x_base)
  78 {
  79         acp_writel(ACP_EXT_INTR_STAT_CLEAR_MASK, acp5x_base +
  80                    ACP_EXTERNAL_INTR_STAT);
  81         acp_writel(0x00, acp5x_base + ACP_EXTERNAL_INTR_CNTL);
  82         acp_writel(0x00, acp5x_base + ACP_EXTERNAL_INTR_ENB);
  83 }
  84
  85 static int acp5x_init(void __iomem *acp5x_base)
  86 {
  87         int ret;
  88
  89         /* power on */
  90         ret = acp5x_power_on(acp5x_base);
  91         if (ret) {
  92                 pr_err("ACP5x power on failed\n");
  93                 return ret;
  94         }
  95         acp_writel(0x01, acp5x_base + ACP_CONTROL);
  96         /* Reset */
  97         ret = acp5x_reset(acp5x_base);
  98         if (ret) {
  99                 pr_err("ACP5x reset failed\n");
 100                 return ret;
 101         }
 102         acp_writel(0x03, acp5x_base + ACP_CLKMUX_SEL);
 103         acp5x_enable_interrupts(acp5x_base);
 104         return 0;
 105 }
 106
 107 static int acp5x_deinit(void __iomem *acp5x_base)
 108 {
 109         int ret;
 110
 111         acp5x_disable_interrupts(acp5x_base);
 112         /* Reset */
 113         ret = acp5x_reset(acp5x_base);
 114         if (ret) {
 115                 pr_err("ACP5x reset failed\n");
 116                 return ret;
 117         }
 118         acp_writel(0x00, acp5x_base + ACP_CLKMUX_SEL);
 119         acp_writel(0x00, acp5x_base + ACP_CONTROL);
 120         return 0;
 121 }
 122
 123 static int snd_acp5x_probe(struct pci_dev *pci,
 124                            const struct pci_device_id *pci_id)
 125 {
 126         struct acp5x_dev_data *adata;
 127         struct platform_device_info pdevinfo[ACP5x_DEVS];
 128         unsigned int irqflags;
 129         int ret, i;
 130         u32 addr, val;
 131
 132         irqflags = IRQF_SHARED;
 133         if (pci->revision != 0x50)
 134                 return -ENODEV;
 135
 136         if (pci_enable_device(pci)) {
 137                 dev_err(&pci->dev, "pci_enable_device failed\n");
 138                 return -ENODEV;
 139         }
 140
 141         ret = pci_request_regions(pci, "AMD ACP5x audio");
 142         if (ret < 0) {
 143                 dev_err(&pci->dev, "pci_request_regions failed\n");
 144                 goto disable_pci;
 145         }
 146
 147         adata = devm_kzalloc(&pci->dev, sizeof(struct acp5x_dev_data),
 148                              GFP_KERNEL);
 149         if (!adata) {
 150                 ret = -ENOMEM;
 151                 goto release_regions;
 152         }
 153         addr = pci_resource_start(pci, 0);
 154         adata->acp5x_base = devm_ioremap(&pci->dev, addr,
 155                                          pci_resource_len(pci, 0));
 156         if (!adata->acp5x_base) {
 157                 ret = -ENOMEM;
 158                 goto release_regions;
 159         }
 160         pci_set_master(pci);
 161         pci_set_drvdata(pci, adata);
 162         ret = acp5x_init(adata->acp5x_base);
 163         if (ret)
 164                 goto release_regions;
 165
 166         val = acp_readl(adata->acp5x_base + ACP_PIN_CONFIG);
 167         switch (val) {
 168         case I2S_MODE:
 169                 adata->res = devm_kzalloc(&pci->dev,
 170                                           sizeof(struct resource) * ACP5x_RES,
 171                                           GFP_KERNEL);
 172                 if (!adata->res) {
 173                         ret = -ENOMEM;
 174                         goto de_init;
 175                 }
 176
 177                 adata->res[0].name = "acp5x_i2s_iomem";
 178                 adata->res[0].flags = IORESOURCE_MEM;
 179                 adata->res[0].start = addr;
 180                 adata->res[0].end = addr + (ACP5x_REG_END - ACP5x_REG_START);
 181
 182                 adata->res[1].name = "acp5x_i2s_sp";
 183                 adata->res[1].flags = IORESOURCE_MEM;
 184                 adata->res[1].start = addr + ACP5x_I2STDM_REG_START;
 185                 adata->res[1].end = addr + ACP5x_I2STDM_REG_END;
 186
 187                 adata->res[2].name = "acp5x_i2s_hs";
 188                 adata->res[2].flags = IORESOURCE_MEM;
 189                 adata->res[2].start = addr + ACP5x_HS_TDM_REG_START;
 190                 adata->res[2].end = addr + ACP5x_HS_TDM_REG_END;
 191
 192                 adata->res[3].name = "acp5x_i2s_irq";
 193                 adata->res[3].flags = IORESOURCE_IRQ;
 194                 adata->res[3].start = pci->irq;
 195                 adata->res[3].end = adata->res[3].start;
 196
 197                 adata->acp5x_audio_mode = ACP5x_I2S_MODE;
 198
 199                 memset(&pdevinfo, 0, sizeof(pdevinfo));
 200                 pdevinfo[0].name = "acp5x_i2s_dma";
 201                 pdevinfo[0].id = 0;
 202                 pdevinfo[0].parent = &pci->dev;
 203                 pdevinfo[0].num_res = 4;
 204                 pdevinfo[0].res = &adata->res[0];
 205                 pdevinfo[0].data = &irqflags;
 206                 pdevinfo[0].size_data = sizeof(irqflags);
 207
 208                 pdevinfo[1].name = "acp5x_i2s_playcap";
 209                 pdevinfo[1].id = 0;
 210                 pdevinfo[1].parent = &pci->dev;
 211                 pdevinfo[1].num_res = 1;
 212                 pdevinfo[1].res = &adata->res[1];
 213
 214                 pdevinfo[2].name = "acp5x_i2s_playcap";
 215                 pdevinfo[2].id = 1;
 216                 pdevinfo[2].parent = &pci->dev;
 217                 pdevinfo[2].num_res = 1;
 218                 pdevinfo[2].res = &adata->res[2];
 219
 220                 pdevinfo[3].name = "acp5x_mach";
 221                 pdevinfo[3].id = 0;
 222                 pdevinfo[3].parent = &pci->dev;
 223                 for (i = 0; i < ACP5x_DEVS; i++) {
 224                         adata->pdev[i] =
 225                                 platform_device_register_full(&pdevinfo[i]);
 226                         if (IS_ERR(adata->pdev[i])) {
 227                                 dev_err(&pci->dev, "cannot register %s device\n",
 228                                         pdevinfo[i].name);
 229                                 ret = PTR_ERR(adata->pdev[i]);
 230                                 goto unregister_devs;
 231                         }
 232                 }
 233                 break;
 234         default:
 235                 dev_info(&pci->dev, "ACP audio mode : %d\n", val);
 236         }
 237         pm_runtime_set_autosuspend_delay(&pci->dev, 2000);
 238         pm_runtime_use_autosuspend(&pci->dev);
 239         pm_runtime_put_noidle(&pci->dev);
 240         pm_runtime_allow(&pci->dev);
 241         return 0;
 242
 243 unregister_devs:
 244         for (--i; i >= 0; i--)
 245                 platform_device_unregister(adata->pdev[i]);
 246 de_init:
 247         if (acp5x_deinit(adata->acp5x_base))
 248                 dev_err(&pci->dev, "ACP de-init failed\n");
 249 release_regions:
 250         pci_release_regions(pci);
 251 disable_pci:
 252         pci_disable_device(pci);
 253
 254         return ret;
 255 }
 256
 257 static int __maybe_unused snd_acp5x_suspend(struct device *dev)
 258 {
 259         int ret;
 260         struct acp5x_dev_data *adata;
 261
 262         adata = dev_get_drvdata(dev);
 263         ret = acp5x_deinit(adata->acp5x_base);
 264         if (ret)
 265                 dev_err(dev, "ACP de-init failed\n");
 266         else
 267                 dev_dbg(dev, "ACP de-initialized\n");
 268
 269         return ret;
 270 }
 271
 272 static int __maybe_unused snd_acp5x_resume(struct device *dev)
 273 {
 274         int ret;
 275         struct acp5x_dev_data *adata;
 276
 277         adata = dev_get_drvdata(dev);
 278         ret = acp5x_init(adata->acp5x_base);
 279         if (ret) {
 280                 dev_err(dev, "ACP init failed\n");
 281                 return ret;
 282         }
 283         return 0;
 284 }
 285
 286 static const struct dev_pm_ops acp5x_pm = {
 287         SET_RUNTIME_PM_OPS(snd_acp5x_suspend,
 288                            snd_acp5x_resume, NULL)
 289         SET_SYSTEM_SLEEP_PM_OPS(snd_acp5x_suspend, snd_acp5x_resume)
 290 };
 291
 292 static void snd_acp5x_remove(struct pci_dev *pci)
 293 {
 294         struct acp5x_dev_data *adata;
 295         int i, ret;
 296
 297         adata = pci_get_drvdata(pci);
 298         if (adata->acp5x_audio_mode == ACP5x_I2S_MODE) {
 299                 for (i = 0; i < ACP5x_DEVS; i++)
 300                         platform_device_unregister(adata->pdev[i]);
 301         }
 302         ret = acp5x_deinit(adata->acp5x_base);
 303         if (ret)
 304                 dev_err(&pci->dev, "ACP de-init failed\n");
 305         pm_runtime_forbid(&pci->dev);
 306         pm_runtime_get_noresume(&pci->dev);
 307         pci_release_regions(pci);
 308         pci_disable_device(pci);
 309 }
 310
 311 static const struct pci_device_id snd_acp5x_ids[] = {
 312         { PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_DEVICE_ID),
 313         .class = PCI_CLASS_MULTIMEDIA_OTHER << 8,
 314         .class_mask = 0xffffff },
 315         { 0, },
 316 };
 317 MODULE_DEVICE_TABLE(pci, snd_acp5x_ids);
 318
 319 static struct pci_driver acp5x_driver  = {
 320         .name = KBUILD_MODNAME,
 321         .id_table = snd_acp5x_ids,
 322         .probe = snd_acp5x_probe,
 323         .remove = snd_acp5x_remove,
 324         .driver = {
 325                 .pm = &acp5x_pm,
 326         }
 327 };
 328
 329 module_pci_driver(acp5x_driver);
 330
 331 MODULE_AUTHOR("Vijendar.Mukunda@amd.com");
 332 MODULE_DESCRIPTION("AMD Vangogh ACP PCI driver");
 333 MODULE_LICENSE("GPL v2");