/*
* 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/platform_device.h>
#include <linux/module.h>
#include <linux/err.h>
#include <linux/io.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>
#include "acp3x.h"
#define DRV_NAME "acp3x-i2s-audio"
struct i2s_dev_data {
void __iomem *acp3x_base;
struct snd_pcm_substream *play_stream;
struct snd_pcm_substream *capture_stream;
};
static int acp3x_power_on(void __iomem *acp3x_base, bool on)
{
u16 val, mask;
u32 timeout;
if (on == true) {
val = 1;
mask = ACP3x_POWER_ON;
} else {
val = 0;
mask = ACP3x_POWER_OFF;
}
rv_writel(val, acp3x_base + mmACP_PGFSM_CONTROL);
timeout = 0;
while (true) {
val = rv_readl(acp3x_base + mmACP_PGFSM_STATUS);
if ((val & ACP3x_POWER_OFF_IN_PROGRESS) == mask)
break;
if (timeout > 100) {
pr_err("ACP3x power state change failure\n");
return -ENODEV;
}
timeout++;
cpu_relax();
}
return 0;
}
static int acp3x_reset(void __iomem *acp3x_base)
{
u32 val, timeout;
rv_writel(1, acp3x_base + mmACP_SOFT_RESET);
timeout = 0;
while (true) {
val = rv_readl(acp3x_base + mmACP_SOFT_RESET);
if ((val & ACP3x_SOFT_RESET__SoftResetAudDone_MASK) ||
timeout > 100) {
if (val & ACP3x_SOFT_RESET__SoftResetAudDone_MASK)
break;
return -ENODEV;
}
timeout++;
cpu_relax();
}
rv_writel(0, acp3x_base + mmACP_SOFT_RESET);
timeout = 0;
while (true) {
val = rv_readl(acp3x_base + mmACP_SOFT_RESET);
if (!val || timeout > 100) {
if (!val)
break;
return -ENODEV;
}
timeout++;
cpu_relax();
}
return 0;
}
static int acp3x_init(void __iomem *acp3x_base)
{
int ret;
/* power on */
ret = acp3x_power_on(acp3x_base, true);
if (ret) {
pr_err("ACP3x power on failed\n");
return ret;
}
/* Reset */
ret = acp3x_reset(acp3x_base);
if (ret) {
pr_err("ACP3x reset failed\n");
return ret;
}
return 0;
}
static int acp3x_deinit(void __iomem *acp3x_base)
{
int ret;
/* Reset */
ret = acp3x_reset(acp3x_base);
if (ret) {
pr_err("ACP3x reset failed\n");
return ret;
}
/* power off */
ret = acp3x_power_on(acp3x_base, false);
if (ret) {
pr_err("ACP3x power off failed\n");
return ret;
}
return 0;
}
static struct snd_pcm_ops acp3x_dma_ops = {
.open = NULL,
.close = NULL,
.ioctl = NULL,
.hw_params = NULL,
.hw_free = NULL,
.pointer = NULL,
.mmap = NULL,
};
struct snd_soc_dai_ops acp3x_dai_i2s_ops = {
.hw_params = NULL,
.trigger = NULL,
.set_fmt = NULL,
};
static struct snd_soc_dai_driver acp3x_i2s_dai_driver = {
.playback = {
.rates = SNDRV_PCM_RATE_8000_96000,
.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 |
SNDRV_PCM_FMTBIT_U8 |
SNDRV_PCM_FMTBIT_S24_LE |
SNDRV_PCM_FMTBIT_S32_LE,
.channels_min = 2,
.channels_max = 8,
.rate_min = 8000,
.rate_max = 96000,
},
.capture = {
.rates = SNDRV_PCM_RATE_8000_48000,
.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 |
SNDRV_PCM_FMTBIT_U8 |
SNDRV_PCM_FMTBIT_S24_LE |
SNDRV_PCM_FMTBIT_S32_LE,
.channels_min = 2,
.channels_max = 2,
.rate_min = 8000,
.rate_max = 48000,
},
.ops = &acp3x_dai_i2s_ops,
};
static const struct snd_soc_component_driver acp3x_i2s_component = {
.name = DRV_NAME,
.ops = &acp3x_dma_ops,
.pcm_new = acp3x_dma_new,
};
static int acp3x_audio_probe(struct platform_device *pdev)
{
int status;
struct resource *res;
struct i2s_dev_data *adata;
unsigned int irqflags;
if (!pdev->dev.platform_data) {
dev_err(&pdev->dev, "platform_data not retrieved\n");
return -ENODEV;
}
irqflags = *((unsigned int *)(pdev->dev.platform_data));
adata = devm_kzalloc(&pdev->dev, sizeof(struct i2s_dev_data),
GFP_KERNEL);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev, "IORESOURCE_IRQ FAILED\n");
return -ENODEV;
}
adata->acp3x_base = devm_ioremap(&pdev->dev, res->start,
resource_size(res));
adata->play_stream = NULL;
adata->capture_stream = NULL;
dev_set_drvdata(&pdev->dev, adata);
/* Initialize ACP */
status = acp3x_init(adata->acp3x_base);
if (status)
return -ENODEV;
status = devm_snd_soc_register_component(&pdev->dev,
&acp3x_i2s_component,
&acp3x_i2s_dai_driver, 1);
if (status) {
dev_err(&pdev->dev, "Fail to register acp i2s dai\n");
goto dev_err;
}
return 0;
dev_err:
status = acp3x_deinit(adata->acp3x_base);
if (status)
dev_err(&pdev->dev, "ACP de-init failed\n");
else
dev_info(&pdev->dev, "ACP de-initialized\n");
/*ignore device status and return driver probe error*/
return -ENODEV;
}
static int acp3x_audio_remove(struct platform_device *pdev)
{
int ret;
struct i2s_dev_data *adata = dev_get_drvdata(&pdev->dev);
ret = acp3x_deinit(adata->acp3x_base);
if (ret)
dev_err(&pdev->dev, "ACP de-init failed\n");
else
dev_info(&pdev->dev, "ACP de-initialized\n");
return 0;
}
static struct platform_driver acp3x_dma_driver = {
.probe = acp3x_audio_probe,
.remove = acp3x_audio_remove,
.driver = {
.name = "acp3x_rv_i2s",
},
};
module_platform_driver(acp3x_dma_driver);
MODULE_AUTHOR("Maruthi.Bayyavarapu@amd.com");
MODULE_AUTHOR("Vijendar.Mukunda@amd.com");
MODULE_DESCRIPTION("AMD ACP 3.x PCM Driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:" DRV_NAME);