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From 2982cc86ba3f73a1ae0c205bb19d34fba69f0d39 Mon Sep 17 00:00:00 2001
From: Maruthi Srinivas Bayyavarapu <Maruthi.Bayyavarapu@amd.com>
Date: Mon, 27 Mar 2017 14:25:49 +0530
Subject: [PATCH 1100/4131] ASoC: AMD: add ACP3.0 PCI driver
ACP 3.0 is a PCI audio device. This patch adds PCI driver to bind
to this device and get PCI resources.
Signed-off-by: Maruthi Bayyavarapu <maruthi.bayyavarapu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
sound/soc/amd/raven/acp3x.h | 13 ++++++
sound/soc/amd/raven/pci-acp3x.c | 97 +++++++++++++++++++++++++++++++++++++++++
2 files changed, 110 insertions(+)
create mode 100644 sound/soc/amd/raven/acp3x.h
create mode 100644 sound/soc/amd/raven/pci-acp3x.c
diff --git a/sound/soc/amd/raven/acp3x.h b/sound/soc/amd/raven/acp3x.h
new file mode 100644
index 0000000..e9b4df0
--- /dev/null
+++ b/sound/soc/amd/raven/acp3x.h
@@ -0,0 +1,13 @@
+#include "chip_offset_byte.h"
+
+#define ACP3x_PHY_BASE_ADDRESS 0x1240000
+
+static inline u32 rv_readl(void __iomem *base_addr)
+{
+ return readl(base_addr - ACP3x_PHY_BASE_ADDRESS);
+}
+
+static inline void rv_writel(u32 val, void __iomem *base_addr)
+{
+ writel(val, base_addr - ACP3x_PHY_BASE_ADDRESS);
+}
diff --git a/sound/soc/amd/raven/pci-acp3x.c b/sound/soc/amd/raven/pci-acp3x.c
new file mode 100644
index 0000000..204212b
--- /dev/null
+++ b/sound/soc/amd/raven/pci-acp3x.c
@@ -0,0 +1,97 @@
+/*
+ * AMD ALSA SoC PCM Driver
+ *
+ * Copyright 2016 Advanced Micro Devices, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/pci.h>
+#include <linux/module.h>
+
+#include "acp3x.h"
+
+struct acp3x_dev_data {
+ void __iomem *acp3x_base;
+};
+
+static int snd_acp3x_probe(struct pci_dev *pci,
+ const struct pci_device_id *pci_id)
+{
+ int ret;
+ u32 addr;
+ struct acp3x_dev_data *adata;
+
+ 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 acp3x_dev_data),
+ GFP_KERNEL);
+ if (adata == NULL) {
+ ret = -ENOMEM;
+ goto release_regions;
+ }
+
+ addr = pci_resource_start(pci, 0);
+ adata->acp3x_base = ioremap(addr, pci_resource_len(pci, 0));
+ if (adata->acp3x_base == NULL) {
+ ret = -ENOMEM;
+ goto release_regions;
+ }
+
+ pci_set_drvdata(pci, adata);
+
+ return 0;
+
+release_regions:
+ pci_release_regions(pci);
+disable_pci:
+ pci_disable_device(pci);
+
+ return ret;
+}
+
+static void snd_acp3x_remove(struct pci_dev *pci)
+{
+ struct acp3x_dev_data *adata = pci_get_drvdata(pci);
+
+ iounmap(adata->acp3x_base);
+ pci_release_regions(pci);
+ pci_disable_device(pci);
+}
+
+static const struct pci_device_id snd_acp3x_ids[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x15e2),
+ .class = PCI_CLASS_MULTIMEDIA_OTHER << 8,
+ .class_mask = 0xffffff },
+ { 0, },
+};
+MODULE_DEVICE_TABLE(pci, snd_acp3x_ids);
+
+static struct pci_driver acp3x_driver = {
+ .name = KBUILD_MODNAME,
+ .id_table = snd_acp3x_ids,
+ .probe = snd_acp3x_probe,
+ .remove = snd_acp3x_remove,
+};
+
+module_pci_driver(acp3x_driver);
+
+MODULE_AUTHOR("Maruthi.Bayyavarapu@amd.com");
+MODULE_DESCRIPTION("AMD ACP3x PCI driver");
+MODULE_LICENSE("GPL v2");
--
2.7.4
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