ACP is a PCI audio device. This patch adds PCI driver to bind to this device and get PCI resources for Pink Sardine Platform.
Signed-off-by: Syed Saba Kareem Syed.SabaKareem@amd.com Signed-off-by: Vijendar Mukunda Vijendar.Mukunda@amd.com --- sound/soc/amd/ps/acp62.h | 21 +++++++++ sound/soc/amd/ps/pci-ps.c | 94 +++++++++++++++++++++++++++++++++++++++ 2 files changed, 115 insertions(+) create mode 100644 sound/soc/amd/ps/acp62.h create mode 100644 sound/soc/amd/ps/pci-ps.c
diff --git a/sound/soc/amd/ps/acp62.h b/sound/soc/amd/ps/acp62.h new file mode 100644 index 000000000000..e91762240c93 --- /dev/null +++ b/sound/soc/amd/ps/acp62.h @@ -0,0 +1,21 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * AMD ALSA SoC PDM Driver + * + * Copyright (C) 2022 Advanced Micro Devices, Inc. All rights reserved. + */ + +#include <sound/acp62_chip_offset_byte.h> + +#define ACP_DEVICE_ID 0x15E2 +#define ACP62_PHY_BASE_ADDRESS 0x1240000 + +static inline u32 acp62_readl(void __iomem *base_addr) +{ + return readl(base_addr - ACP62_PHY_BASE_ADDRESS); +} + +static inline void acp62_writel(u32 val, void __iomem *base_addr) +{ + writel(val, base_addr - ACP62_PHY_BASE_ADDRESS); +} diff --git a/sound/soc/amd/ps/pci-ps.c b/sound/soc/amd/ps/pci-ps.c new file mode 100644 index 000000000000..25169797275c --- /dev/null +++ b/sound/soc/amd/ps/pci-ps.c @@ -0,0 +1,94 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * AMD Pink Sardine ACP PCI Driver + * + * Copyright 2022 Advanced Micro Devices, Inc. + */ + +#include <linux/pci.h> +#include <linux/module.h> +#include <linux/io.h> + +#include "acp62.h" + +struct acp62_dev_data { + void __iomem *acp62_base; +}; + +static int snd_acp62_probe(struct pci_dev *pci, + const struct pci_device_id *pci_id) +{ + struct acp62_dev_data *adata; + u32 addr; + int ret; + + /* Pink Sardine device check */ + switch (pci->revision) { + case 0x63: + break; + default: + dev_dbg(&pci->dev, "acp62 pci device not found\n"); + return -ENODEV; + } + if (pci_enable_device(pci)) { + dev_err(&pci->dev, "pci_enable_device failed\n"); + return -ENODEV; + } + + ret = pci_request_regions(pci, "AMD ACP6.2 audio"); + if (ret < 0) { + dev_err(&pci->dev, "pci_request_regions failed\n"); + goto disable_pci; + } + adata = devm_kzalloc(&pci->dev, sizeof(struct acp62_dev_data), + GFP_KERNEL); + if (!adata) { + ret = -ENOMEM; + goto release_regions; + } + + addr = pci_resource_start(pci, 0); + adata->acp62_base = devm_ioremap(&pci->dev, addr, + pci_resource_len(pci, 0)); + if (!adata->acp62_base) { + ret = -ENOMEM; + goto release_regions; + } + pci_set_master(pci); + pci_set_drvdata(pci, adata); + return 0; +release_regions: + pci_release_regions(pci); +disable_pci: + pci_disable_device(pci); + + return ret; +} + +static void snd_acp62_remove(struct pci_dev *pci) +{ + pci_release_regions(pci); + pci_disable_device(pci); +} + +static const struct pci_device_id snd_acp62_ids[] = { + { PCI_DEVICE(PCI_VENDOR_ID_AMD, ACP_DEVICE_ID), + .class = PCI_CLASS_MULTIMEDIA_OTHER << 8, + .class_mask = 0xffffff }, + { 0, }, +}; +MODULE_DEVICE_TABLE(pci, snd_acp62_ids); + +static struct pci_driver ps_acp62_driver = { + .name = KBUILD_MODNAME, + .id_table = snd_acp62_ids, + .probe = snd_acp62_probe, + .remove = snd_acp62_remove, +}; + +module_pci_driver(ps_acp62_driver); + +MODULE_AUTHOR("Vijendar.Mukunda@amd.com"); +MODULE_AUTHOR("Syed.SabaKareem@amd.com"); +MODULE_DESCRIPTION("AMD ACP Pink Sardine PCI driver"); +MODULE_LICENSE("GPL v2");