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ASoC: amd: create ACP3x PCM platform device

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ACP 3x IP has I2S controller device as one of IP blocks.
Create a platform device for it, so that the PCM platform driver
can be bound to this device. Pass PCI resources like MMIO, irq
to the platform device.

Signed-off-by: Maruthi Bayyavarapu <maruthi.bayyavarapu@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:
Vijendar Mukunda 2018-11-12 11:04:54 +05:30 committed by Mark Brown
parent e30d9128de
commit 7894a7e7ea
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
2 changed files with 73 additions and 1 deletions
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4
sound/soc/amd/raven/acp3x.h
View File

@ -1,6 +1,10 @@
#include "chip_offset_byte.h"
#define ACP3x_PHY_BASE_ADDRESS 0x1240000
#define ACP3x_I2S_MODE 0
#define ACP3x_REG_START 0x1240000
#define ACP3x_REG_END 0x1250200
#define I2S_MODE 0x04
static inline u32 rv_readl(void __iomem *base_addr)
{

70
sound/soc/amd/raven/pci-acp3x.c
View File

@ -16,19 +16,26 @@
#include <linux/pci.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include "acp3x.h"
struct acp3x_dev_data {
void __iomem *acp3x_base;
bool acp3x_audio_mode;
struct resource *res;
struct platform_device *pdev;
};
static int snd_acp3x_probe(struct pci_dev *pci,
const struct pci_device_id *pci_id)
{
int ret;
u32 addr;
u32 addr, val;
struct acp3x_dev_data *adata;
struct platform_device_info pdevinfo;
unsigned int irqflags;
if (pci_enable_device(pci)) {
dev_err(&pci->dev, "pci_enable_device failed\n");
@ -48,6 +55,15 @@ static int snd_acp3x_probe(struct pci_dev *pci,
goto release_regions;
}
/* check for msi interrupt support */
ret = pci_enable_msi(pci);
if (ret)
/* msi is not enabled */
irqflags = IRQF_SHARED;
else
/* msi is enabled */
irqflags = 0;
addr = pci_resource_start(pci, 0);
adata->acp3x_base = ioremap(addr, pci_resource_len(pci, 0));
if (!adata->acp3x_base) {
@ -56,8 +72,57 @@ static int snd_acp3x_probe(struct pci_dev *pci,
}
pci_set_master(pci);
pci_set_drvdata(pci, adata);
val = rv_readl(adata->acp3x_base + mmACP_I2S_PIN_CONFIG);
switch (val) {
case I2S_MODE:
adata->res = devm_kzalloc(&pci->dev,
sizeof(struct resource) * 2,
GFP_KERNEL);
if (!adata->res) {
ret = -ENOMEM;
goto unmap_mmio;
}
adata->res[0].name = "acp3x_i2s_iomem";
adata->res[0].flags = IORESOURCE_MEM;
adata->res[0].start = addr;
adata->res[0].end = addr + (ACP3x_REG_END - ACP3x_REG_START);
adata->res[1].name = "acp3x_i2s_irq";
adata->res[1].flags = IORESOURCE_IRQ;
adata->res[1].start = pci->irq;
adata->res[1].end = pci->irq;
adata->acp3x_audio_mode = ACP3x_I2S_MODE;
memset(&pdevinfo, 0, sizeof(pdevinfo));
pdevinfo.name = "acp3x_rv_i2s";
pdevinfo.id = 0;
pdevinfo.parent = &pci->dev;
pdevinfo.num_res = 2;
pdevinfo.res = adata->res;
pdevinfo.data = &irqflags;
pdevinfo.size_data = sizeof(irqflags);
adata->pdev = platform_device_register_full(&pdevinfo);
if (!adata->pdev) {
dev_err(&pci->dev, "cannot register %s device\n",
pdevinfo.name);
ret = -ENODEV;
goto unmap_mmio;
}
break;
default:
dev_err(&pci->dev, "Inavlid ACP audio mode : %d\n", val);
ret = -ENODEV;
goto unmap_mmio;
}
return 0;
unmap_mmio:
pci_disable_msi(pci);
iounmap(adata->acp3x_base);
release_regions:
pci_release_regions(pci);
disable_pci:
@ -70,7 +135,10 @@ static void snd_acp3x_remove(struct pci_dev *pci)
{
struct acp3x_dev_data *adata = pci_get_drvdata(pci);
platform_device_unregister(adata->pdev);
iounmap(adata->acp3x_base);
pci_disable_msi(pci);
pci_release_regions(pci);
pci_disable_device(pci);
}