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Message-ID: <20210716150809.21450-3-vijendar.mukunda@amd.com>
Date: Fri, 16 Jul 2021 20:37:59 +0530
From: Vijendar Mukunda <vijendar.mukunda@....com>
To: <broonie@...nel.org>, <alsa-devel@...a-project.org>
CC: <Alexander.Deucher@....com>, <Sunil-kumar.Dommati@....com>,
"Vijendar Mukunda" <Vijendar.Mukunda@....com>,
Liam Girdwood <lgirdwood@...il.com>,
Jaroslav Kysela <perex@...ex.cz>,
Takashi Iwai <tiwai@...e.com>,
"Vijendar Mukunda" <vijendar.mukunda@....com>,
open list <linux-kernel@...r.kernel.org>
Subject: [PATCH V2 02/12] ASoC: amd: add Vangogh ACP PCI driver
From: Vijendar Mukunda <Vijendar.Mukunda@....com>
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 <Vijendar.Mukunda@....com>
---
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 <linux/pci.h>
+#include <linux/module.h>
+#include <linux/io.h>
+
+#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@....com");
+MODULE_DESCRIPTION("AMD Vangogh ACP PCI driver");
+MODULE_LICENSE("GPL v2");
--
2.17.1
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