diff options
Diffstat (limited to 'sound/soc/amd/acp/acp-pci.c')
| -rw-r--r-- | sound/soc/amd/acp/acp-pci.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/sound/soc/amd/acp/acp-pci.c b/sound/soc/amd/acp/acp-pci.c new file mode 100644 index 000000000..a0c84cd07 --- /dev/null +++ b/sound/soc/amd/acp/acp-pci.c @@ -0,0 +1,181 @@ +// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) +// +// This file is provided under a dual BSD/GPLv2 license. When using or +// redistributing this file, you may do so under either license. +// +// Copyright(c) 2022 Advanced Micro Devices, Inc. All rights reserved. +// +// Authors: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com> + +/* + * Generic PCI interface for ACP device + */ + +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/pci.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> +#include <linux/module.h> + +#include "amd.h" +#include "../mach-config.h" + +#define DRV_NAME "acp_pci" + +#define ACP3x_REG_START 0x1240000 +#define ACP3x_REG_END 0x125C000 + +static struct platform_device *dmic_dev; +static struct platform_device *pdev; + +static const struct resource acp_res[] = { + { + .start = 0, + .end = ACP3x_REG_END - ACP3x_REG_START, + .name = "acp_mem", + .flags = IORESOURCE_MEM, + }, + { + .start = 0, + .end = 0, + .name = "acp_dai_irq", + .flags = IORESOURCE_IRQ, + }, +}; + +static int acp_pci_probe(struct pci_dev *pci, const struct pci_device_id *pci_id) +{ + struct platform_device_info pdevinfo; + struct device *dev = &pci->dev; + const struct resource *res_acp; + struct acp_chip_info *chip; + struct resource *res; + unsigned int flag, addr, num_res, i; + int ret; + + flag = snd_amd_acp_find_config(pci); + if (flag != FLAG_AMD_LEGACY) + return -ENODEV; + + chip = devm_kzalloc(&pci->dev, sizeof(*chip), GFP_KERNEL); + if (!chip) + return -ENOMEM; + + if (pci_enable_device(pci)) + return dev_err_probe(&pci->dev, -ENODEV, + "pci_enable_device failed\n"); + + ret = pci_request_regions(pci, "AMD ACP3x audio"); + if (ret < 0) { + dev_err(&pci->dev, "pci_request_regions failed\n"); + ret = -ENOMEM; + goto disable_pci; + } + + pci_set_master(pci); + + res_acp = acp_res; + num_res = ARRAY_SIZE(acp_res); + + switch (pci->revision) { + case 0x01: + chip->name = "acp_asoc_renoir"; + chip->acp_rev = ACP3X_DEV; + break; + case 0x6f: + chip->name = "acp_asoc_rembrandt"; + chip->acp_rev = ACP6X_DEV; + break; + default: + dev_err(dev, "Unsupported device revision:0x%x\n", pci->revision); + ret = -EINVAL; + goto release_regions; + } + + dmic_dev = platform_device_register_data(dev, "dmic-codec", PLATFORM_DEVID_NONE, NULL, 0); + if (IS_ERR(dmic_dev)) { + dev_err(dev, "failed to create DMIC device\n"); + ret = PTR_ERR(dmic_dev); + goto release_regions; + } + + addr = pci_resource_start(pci, 0); + chip->base = devm_ioremap(&pci->dev, addr, pci_resource_len(pci, 0)); + if (!chip->base) { + ret = -ENOMEM; + goto unregister_dmic_dev; + } + + res = devm_kcalloc(&pci->dev, num_res, sizeof(struct resource), GFP_KERNEL); + if (!res) { + ret = -ENOMEM; + goto unregister_dmic_dev; + } + + for (i = 0; i < num_res; i++, res_acp++) { + res[i].name = res_acp->name; + res[i].flags = res_acp->flags; + res[i].start = addr + res_acp->start; + res[i].end = addr + res_acp->end; + if (res_acp->flags == IORESOURCE_IRQ) { + res[i].start = pci->irq; + res[i].end = res[i].start; + } + } + + memset(&pdevinfo, 0, sizeof(pdevinfo)); + + pdevinfo.name = chip->name; + pdevinfo.id = 0; + pdevinfo.parent = &pci->dev; + pdevinfo.num_res = num_res; + pdevinfo.res = &res[0]; + pdevinfo.data = chip; + pdevinfo.size_data = sizeof(*chip); + + pdev = platform_device_register_full(&pdevinfo); + if (IS_ERR(pdev)) { + dev_err(&pci->dev, "cannot register %s device\n", pdevinfo.name); + ret = PTR_ERR(pdev); + goto unregister_dmic_dev; + } + + return ret; + +unregister_dmic_dev: + platform_device_unregister(dmic_dev); +release_regions: + pci_release_regions(pci); +disable_pci: + pci_disable_device(pci); + + return ret; +}; + +static void acp_pci_remove(struct pci_dev *pci) +{ + if (dmic_dev) + platform_device_unregister(dmic_dev); + if (pdev) + platform_device_unregister(pdev); +} + +/* PCI IDs */ +static const struct pci_device_id acp_pci_ids[] = { + { PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_PCI_DEV_ID)}, + { 0, } +}; +MODULE_DEVICE_TABLE(pci, acp_pci_ids); + +/* pci_driver definition */ +static struct pci_driver snd_amd_acp_pci_driver = { + .name = KBUILD_MODNAME, + .id_table = acp_pci_ids, + .probe = acp_pci_probe, + .remove = acp_pci_remove, +}; +module_pci_driver(snd_amd_acp_pci_driver); + +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_ALIAS(DRV_NAME); |