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ASoC: amd: add Renoir ACP PCI driver

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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@amd.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200518171704.24999-3-Vijendar.Mukunda@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Vijendar Mukunda 2020-05-19 01:16:52 +08:00 committed by Mark Brown
parent 9b5e98e214
commit 1eb2852efe
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GPG Key ID: 24D68B725D5487D0
2 changed files with 108 additions and 0 deletions
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87
sound/soc/amd/renoir/rn-pci-acp3x.c Normal file
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// 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@amd.com");
MODULE_DESCRIPTION("AMD ACP Renoir PCI driver");
MODULE_LICENSE("GPL v2");

21
sound/soc/amd/renoir/rn_acp3x.h Normal file
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/* 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);
}