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
  11 #include "acp5x.h"
  12
  13 struct acp5x_dev_data {
  14         void __iomem *acp5x_base;
  15 };
  16
  17 static int snd_acp5x_probe(struct pci_dev *pci,
  18                            const struct pci_device_id *pci_id)
  19 {
  20         struct acp5x_dev_data *adata;
  21         int ret;
  22         u32 addr;
  23
  24         if (pci->revision != 0x50)
  25                 return -ENODEV;
  26
  27         if (pci_enable_device(pci)) {
  28                 dev_err(&pci->dev, "pci_enable_device failed\n");
  29                 return -ENODEV;
  30         }
  31
  32         ret = pci_request_regions(pci, "AMD ACP5x audio");
  33         if (ret < 0) {
  34                 dev_err(&pci->dev, "pci_request_regions failed\n");
  35                 goto disable_pci;
  36         }
  37
  38         adata = devm_kzalloc(&pci->dev, sizeof(struct acp5x_dev_data),
  39                              GFP_KERNEL);
  40         if (!adata) {
  41                 ret = -ENOMEM;
  42                 goto release_regions;
  43         }
  44         addr = pci_resource_start(pci, 0);
  45         adata->acp5x_base = devm_ioremap(&pci->dev, addr,
  46                                          pci_resource_len(pci, 0));
  47         if (!adata->acp5x_base) {
  48                 ret = -ENOMEM;
  49                 goto release_regions;
  50         }
  51         pci_set_master(pci);
  52         pci_set_drvdata(pci, adata);
  53
  54 release_regions:
  55         pci_release_regions(pci);
  56 disable_pci:
  57         pci_disable_device(pci);
  58
  59         return ret;
  60 }
  61
  62 static void snd_acp5x_remove(struct pci_dev *pci)
  63 {
  64         pci_release_regions(pci);
  65         pci_disable_device(pci);
  66 }
  67
  68 static const struct pci_device_id snd_acp5x_ids[] = {
  69         { PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_DEVICE_ID),
  70         .class = PCI_CLASS_MULTIMEDIA_OTHER << 8,
  71         .class_mask = 0xffffff },
  72         { 0, },
  73 };
  74 MODULE_DEVICE_TABLE(pci, snd_acp5x_ids);
  75
  76 static struct pci_driver acp5x_driver  = {
  77         .name = KBUILD_MODNAME,
  78         .id_table = snd_acp5x_ids,
  79         .probe = snd_acp5x_probe,
  80         .remove = snd_acp5x_remove,
  81 };
  82
  83 module_pci_driver(acp5x_driver);
  84
  85 MODULE_AUTHOR("Vijendar.Mukunda@amd.com");
  86 MODULE_DESCRIPTION("AMD Vangogh ACP PCI driver");
  87 MODULE_LICENSE("GPL v2");