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Date: Thu, 21 Jul 2022 11:39:59 +0530
From: syed sabakareem <Syed.SabaKareem@....com>
To: <broonie@...nel.org>, <alsa-devel@...a-project.org>
CC: <Alexander.Deucher@....com>, <Basavaraj.Hiregoudar@....com>,
<Sunil-kumar.Dommati@....com>, <vijendar.mukunda@....com>,
Syed Saba Kareem <Syed.SabaKareem@....com>,
Vijendar Mukunda <Vijendar.Mukunda@....com>,
"Liam Girdwood" <lgirdwood@...il.com>,
Jaroslav Kysela <perex@...ex.cz>,
"Takashi Iwai" <tiwai@...e.com>,
open list <linux-kernel@...r.kernel.org>
Subject: [PATCH 2/5] ASoC: amd: add ACP PCI driver for RPL platform
From: Syed Saba Kareem <Syed.SabaKareem@....com>
ACP is a PCI audio device.
This patch adds PCI driver to bind to this device and get
PCI resources.
Signed-off-by: Syed Saba Kareem <Syed.SabaKareem@....com>
Reviewed-by: Vijendar Mukunda <Vijendar.Mukunda@....com>
---
sound/soc/amd/rpl/rpl-pci-acp6x.c | 95 +++++++++++++++++++++++++++++++
sound/soc/amd/rpl/rpl_acp6x.h | 21 +++++++
2 files changed, 116 insertions(+)
create mode 100644 sound/soc/amd/rpl/rpl-pci-acp6x.c
create mode 100644 sound/soc/amd/rpl/rpl_acp6x.h
diff --git a/sound/soc/amd/rpl/rpl-pci-acp6x.c b/sound/soc/amd/rpl/rpl-pci-acp6x.c
new file mode 100644
index 000000000000..7a82a978cf24
--- /dev/null
+++ b/sound/soc/amd/rpl/rpl-pci-acp6x.c
@@ -0,0 +1,95 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * AMD RPL ACP PCI Driver
+ *
+ * Copyright 2022 Advanced Micro Devices, Inc.
+ */
+
+#include <linux/pci.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+
+#include "rpl_acp6x.h"
+
+struct rpl_dev_data {
+ void __iomem *acp6x_base;
+};
+
+static int snd_rpl_probe(struct pci_dev *pci,
+ const struct pci_device_id *pci_id)
+{
+ struct rpl_dev_data *adata;
+ u32 addr;
+ int ret;
+
+ /* RPL device check */
+ switch (pci->revision) {
+ case 0x62:
+ break;
+ default:
+ dev_dbg(&pci->dev, "acp6x 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 ACP6x audio");
+ if (ret < 0) {
+ dev_err(&pci->dev, "pci_request_regions failed\n");
+ goto disable_pci;
+ }
+
+ adata = devm_kzalloc(&pci->dev, sizeof(struct rpl_dev_data),
+ GFP_KERNEL);
+ if (!adata) {
+ ret = -ENOMEM;
+ goto release_regions;
+ }
+
+ addr = pci_resource_start(pci, 0);
+ adata->acp6x_base = devm_ioremap(&pci->dev, addr,
+ pci_resource_len(pci, 0));
+ if (!adata->acp6x_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_rpl_remove(struct pci_dev *pci)
+{
+ pci_release_regions(pci);
+ pci_disable_device(pci);
+}
+
+static const struct pci_device_id snd_rpl_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_rpl_ids);
+
+static struct pci_driver rpl_acp6x_driver = {
+ .name = KBUILD_MODNAME,
+ .id_table = snd_rpl_ids,
+ .probe = snd_rpl_probe,
+ .remove = snd_rpl_remove,
+};
+
+module_pci_driver(rpl_acp6x_driver);
+
+MODULE_DESCRIPTION("AMD ACP RPL PCI driver");
+MODULE_LICENSE("GPL v2");
diff --git a/sound/soc/amd/rpl/rpl_acp6x.h b/sound/soc/amd/rpl/rpl_acp6x.h
new file mode 100644
index 000000000000..5de19d5c892e
--- /dev/null
+++ b/sound/soc/amd/rpl/rpl_acp6x.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * AMD ACP Driver
+ *
+ * Copyright (C) 2021 Advanced Micro Devices, Inc. All rights reserved.
+ */
+
+#include "rpl_acp6x_chip_offset_byte.h"
+
+#define ACP_DEVICE_ID 0x15E2
+#define ACP6x_PHY_BASE_ADDRESS 0x1240000
+
+static inline u32 rpl_acp_readl(void __iomem *base_addr)
+{
+ return readl(base_addr - ACP6x_PHY_BASE_ADDRESS);
+}
+
+static inline void rpl_acp_writel(u32 val, void __iomem *base_addr)
+{
+ writel(val, base_addr - ACP6x_PHY_BASE_ADDRESS);
+}
--
2.25.1
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