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ASoC: AMD: add ACP3.0 PCI driver

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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: Sanju R Mehta <sanju.mehta@amd.com>
Tested-by: Ravulapati Vishnu vardhan Rao <Vishnuvardhanrao.Ravulapati@amd.com>
Signed-off-by: Vijendar Mukunda <vijendar.mukunda@amd.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Maruthi Srinivas Bayyavarapu 2018-11-12 11:04:53 +05:30 committed by Mark Brown
parent b1299acd0d
commit e30d9128de
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GPG Key ID: 24D68B725D5487D0
2 changed files with 110 additions and 0 deletions
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13
sound/soc/amd/raven/acp3x.h Normal file
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@ -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);
}

97
sound/soc/amd/raven/pci-acp3x.c Normal file
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@ -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 <linux/io.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) {
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) {
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_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");