From: Vijendar Mukunda <Vijendar.Mukunda@xxxxxxx>
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@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
---
sound/soc/amd/renoir/rn-pci-acp3x.c | 87 +++++++++++++++++++++++++++++
sound/soc/amd/renoir/rn_acp3x.h | 21 +++++++
2 files changed, 108 insertions(+)
create mode 100644 sound/soc/amd/renoir/rn-pci-acp3x.c
create mode 100644 sound/soc/amd/renoir/rn_acp3x.h
diff --git a/sound/soc/amd/renoir/rn-pci-acp3x.c b/sound/soc/amd/renoir/rn-pci-acp3x.c
new file mode 100644
index 000000000000..56b76e355cd4
--- /dev/null
+++ b/sound/soc/amd/renoir/rn-pci-acp3x.c
@@ -0,0 +1,87 @@
+// SPDX-License-Identifier: GPL-2.0+
+//
+// AMD Renoir ACP PCI Driver
+//
+//Copyright 2020 Advanced Micro Devices, Inc.
+
+#include <linux/pci.h>
+#include <linux/module.h>
+#include <linux/io.h>
+
+#include "rn_acp3x.h"
+
+struct acp_dev_data {
+ void __iomem *acp_base;
+};
+
+static int snd_rn_acp_probe(struct pci_dev *pci,
+ const struct pci_device_id *pci_id)
+{
+ struct acp_dev_data *adata;
+ int ret;
+ u32 addr;
+
+ if (pci_enable_device(pci)) {
+ dev_err(&pci->dev, "pci_enable_device failed\n");
+ return -ENODEV;
+ }
+
+ ret = pci_request_regions(pci, "AMD ACP3x audio");
+ if (ret < 0) {
+ dev_err(&pci->dev, "pci_request_regions failed\n");
+ goto disable_pci;
+ }
+
+ adata = devm_kzalloc(&pci->dev, sizeof(struct acp_dev_data),
+ GFP_KERNEL);
+ if (!adata) {
+ ret = -ENOMEM;
+ goto release_regions;
+ }
+
+ addr = pci_resource_start(pci, 0);
+ adata->acp_base = devm_ioremap(&pci->dev, addr,
+ pci_resource_len(pci, 0));
+ if (!adata->acp_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_rn_acp_remove(struct pci_dev *pci)
+{
+ pci_disable_msi(pci);
+ pci_release_regions(pci);
+ pci_disable_device(pci);
+}
+
+static const struct pci_device_id snd_rn_acp_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_rn_acp_ids);
+
+static struct pci_driver rn_acp_driver = {
+ .name = KBUILD_MODNAME,
+ .id_table = snd_rn_acp_ids,
+ .probe = snd_rn_acp_probe,
+ .remove = snd_rn_acp_remove,
+};
+
+module_pci_driver(rn_acp_driver);
+
+MODULE_AUTHOR("Vijendar.Mukunda@xxxxxxx");
+MODULE_DESCRIPTION("AMD ACP Renoir PCI driver");
+MODULE_LICENSE("GPL v2");
diff --git a/sound/soc/amd/renoir/rn_acp3x.h b/sound/soc/amd/renoir/rn_acp3x.h
new file mode 100644
index 000000000000..da5715759646
--- /dev/null
+++ b/sound/soc/amd/renoir/rn_acp3x.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * AMD ALSA SoC PDM Driver
+ *
+ * Copyright 2020 Advanced Micro Devices, Inc.
+ */
+
+#include "rn_chip_offset_byte.h"
+
+#define ACP_PHY_BASE_ADDRESS 0x1240000
+#define ACP_DEVICE_ID 0x15E2
+
+static inline u32 rn_readl(void __iomem *base_addr)
+{
+ return readl(base_addr - ACP_PHY_BASE_ADDRESS);
+}
+
+static inline void rn_writel(u32 val, void __iomem *base_addr)
+{
+ writel(val, base_addr - ACP_PHY_BASE_ADDRESS);
+}
--
2.25.4
