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Fri, 16 Jul 2021 09:51:24 -0500 Received: from LinuxHost.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server id 15.1.2242.4 via Frontend Transport; Fri, 16 Jul 2021 09:51:15 -0500 From: Vijendar Mukunda To: , CC: , , "Vijendar Mukunda" , Liam Girdwood , Jaroslav Kysela , Takashi Iwai , "Vijendar Mukunda" , open list Subject: [PATCH V2 02/12] ASoC: amd: add Vangogh ACP PCI driver Date: Fri, 16 Jul 2021 20:37:59 +0530 Message-ID: <20210716150809.21450-3-vijendar.mukunda@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210716150809.21450-1-vijendar.mukunda@amd.com> References: <20210716150809.21450-1-vijendar.mukunda@amd.com> MIME-Version: 1.0 Content-Type: text/plain X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 87ca9dee-b6f2-4295-08bb-08d948692f99 X-MS-TrafficTypeDiagnostic: DM5PR12MB2471: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:3044; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Jul 2021 14:51:25.5251 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 87ca9dee-b6f2-4295-08bb-08d948692f99 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CO1NAM11FT055.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR12MB2471 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Vijendar Mukunda ACP is a PCI audio device. This patch adds PCI driver to bind to this device and get PCI resources. Signed-off-by: Vijendar Mukunda --- v1 ->v2 : add comment for acp_readl() & acp_writel() API's --- sound/soc/amd/vangogh/acp5x.h | 25 +++++++++ sound/soc/amd/vangogh/pci-acp5x.c | 87 +++++++++++++++++++++++++++++++ 2 files changed, 112 insertions(+) create mode 100644 sound/soc/amd/vangogh/acp5x.h create mode 100644 sound/soc/amd/vangogh/pci-acp5x.c diff --git a/sound/soc/amd/vangogh/acp5x.h b/sound/soc/amd/vangogh/acp5x.h new file mode 100644 index 000000000000..8afa8144af4e --- /dev/null +++ b/sound/soc/amd/vangogh/acp5x.h @@ -0,0 +1,25 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * AMD ALSA SoC PCM Driver + * + * Copyright (C) 2021 Advanced Micro Devices, Inc. All rights reserved. + */ + +#include "vg_chip_offset_byte.h" + +#define ACP5x_PHY_BASE_ADDRESS 0x1240000 +#define ACP_DEVICE_ID 0x15E2 + +/* common header file uses exact offset rather than relative + * offset which requires substraction logic from base_addr + * for accessing ACP5x MMIO space registers + */ +static inline u32 acp_readl(void __iomem *base_addr) +{ + return readl(base_addr - ACP5x_PHY_BASE_ADDRESS); +} + +static inline void acp_writel(u32 val, void __iomem *base_addr) +{ + writel(val, base_addr - ACP5x_PHY_BASE_ADDRESS); +} diff --git a/sound/soc/amd/vangogh/pci-acp5x.c b/sound/soc/amd/vangogh/pci-acp5x.c new file mode 100644 index 000000000000..e56d060a5cb9 --- /dev/null +++ b/sound/soc/amd/vangogh/pci-acp5x.c @@ -0,0 +1,87 @@ +// SPDX-License-Identifier: GPL-2.0+ +// +// AMD Vangogh ACP PCI Driver +// +// Copyright (C) 2021 Advanced Micro Devices, Inc. All rights reserved. + +#include +#include +#include + +#include "acp5x.h" + +struct acp5x_dev_data { + void __iomem *acp5x_base; +}; + +static int snd_acp5x_probe(struct pci_dev *pci, + const struct pci_device_id *pci_id) +{ + struct acp5x_dev_data *adata; + int ret; + u32 addr; + + if (pci->revision != 0x50) + return -ENODEV; + + if (pci_enable_device(pci)) { + dev_err(&pci->dev, "pci_enable_device failed\n"); + return -ENODEV; + } + + ret = pci_request_regions(pci, "AMD ACP5x audio"); + if (ret < 0) { + dev_err(&pci->dev, "pci_request_regions failed\n"); + goto disable_pci; + } + + adata = devm_kzalloc(&pci->dev, sizeof(struct acp5x_dev_data), + GFP_KERNEL); + if (!adata) { + ret = -ENOMEM; + goto release_regions; + } + addr = pci_resource_start(pci, 0); + adata->acp5x_base = devm_ioremap(&pci->dev, addr, + pci_resource_len(pci, 0)); + if (!adata->acp5x_base) { + ret = -ENOMEM; + goto release_regions; + } + pci_set_master(pci); + pci_set_drvdata(pci, adata); + +release_regions: + pci_release_regions(pci); +disable_pci: + pci_disable_device(pci); + + return ret; +} + +static void snd_acp5x_remove(struct pci_dev *pci) +{ + pci_release_regions(pci); + pci_disable_device(pci); +} + +static const struct pci_device_id snd_acp5x_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_acp5x_ids); + +static struct pci_driver acp5x_driver = { + .name = KBUILD_MODNAME, + .id_table = snd_acp5x_ids, + .probe = snd_acp5x_probe, + .remove = snd_acp5x_remove, +}; + +module_pci_driver(acp5x_driver); + +MODULE_AUTHOR("Vijendar.Mukunda@amd.com"); +MODULE_DESCRIPTION("AMD Vangogh ACP PCI driver"); +MODULE_LICENSE("GPL v2"); -- 2.17.1