298 lines
7.1 KiB
C
298 lines
7.1 KiB
C
/*
|
|
* ALSA SoC SPDIF In Audio Layer for spear processors
|
|
*
|
|
* Copyright (C) 2012 ST Microelectronics
|
|
* Vipin Kumar <vipin.kumar@st.com>
|
|
*
|
|
* This file is licensed under the terms of the GNU General Public
|
|
* License version 2. This program is licensed "as is" without any
|
|
* warranty of any kind, whether express or implied.
|
|
*/
|
|
|
|
#include <linux/clk.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/device.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/io.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/module.h>
|
|
#include <linux/platform_device.h>
|
|
#include <sound/pcm.h>
|
|
#include <sound/pcm_params.h>
|
|
#include <sound/soc.h>
|
|
#include <sound/spear_dma.h>
|
|
#include <sound/spear_spdif.h>
|
|
#include "spdif_in_regs.h"
|
|
|
|
struct spdif_in_params {
|
|
u32 format;
|
|
};
|
|
|
|
struct spdif_in_dev {
|
|
struct clk *clk;
|
|
struct spear_dma_data dma_params;
|
|
struct spdif_in_params saved_params;
|
|
void *io_base;
|
|
struct device *dev;
|
|
void (*reset_perip)(void);
|
|
int irq;
|
|
};
|
|
|
|
static void spdif_in_configure(struct spdif_in_dev *host)
|
|
{
|
|
u32 ctrl = SPDIF_IN_PRTYEN | SPDIF_IN_STATEN | SPDIF_IN_USREN |
|
|
SPDIF_IN_VALEN | SPDIF_IN_BLKEN;
|
|
ctrl |= SPDIF_MODE_16BIT | SPDIF_FIFO_THRES_16;
|
|
|
|
writel(ctrl, host->io_base + SPDIF_IN_CTRL);
|
|
writel(0xF, host->io_base + SPDIF_IN_IRQ_MASK);
|
|
}
|
|
|
|
static int spdif_in_startup(struct snd_pcm_substream *substream,
|
|
struct snd_soc_dai *cpu_dai)
|
|
{
|
|
struct spdif_in_dev *host = snd_soc_dai_get_drvdata(cpu_dai);
|
|
|
|
if (substream->stream != SNDRV_PCM_STREAM_CAPTURE)
|
|
return -EINVAL;
|
|
|
|
snd_soc_dai_set_dma_data(cpu_dai, substream, (void *)&host->dma_params);
|
|
return 0;
|
|
}
|
|
|
|
static void spdif_in_shutdown(struct snd_pcm_substream *substream,
|
|
struct snd_soc_dai *dai)
|
|
{
|
|
struct spdif_in_dev *host = snd_soc_dai_get_drvdata(dai);
|
|
|
|
if (substream->stream != SNDRV_PCM_STREAM_CAPTURE)
|
|
return;
|
|
|
|
writel(0x0, host->io_base + SPDIF_IN_IRQ_MASK);
|
|
snd_soc_dai_set_dma_data(dai, substream, NULL);
|
|
}
|
|
|
|
static void spdif_in_format(struct spdif_in_dev *host, u32 format)
|
|
{
|
|
u32 ctrl = readl(host->io_base + SPDIF_IN_CTRL);
|
|
|
|
switch (format) {
|
|
case SNDRV_PCM_FORMAT_S16_LE:
|
|
ctrl |= SPDIF_XTRACT_16BIT;
|
|
break;
|
|
|
|
case SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE:
|
|
ctrl &= ~SPDIF_XTRACT_16BIT;
|
|
break;
|
|
}
|
|
|
|
writel(ctrl, host->io_base + SPDIF_IN_CTRL);
|
|
}
|
|
|
|
static int spdif_in_hw_params(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_hw_params *params,
|
|
struct snd_soc_dai *dai)
|
|
{
|
|
struct spdif_in_dev *host = snd_soc_dai_get_drvdata(dai);
|
|
u32 format;
|
|
|
|
if (substream->stream != SNDRV_PCM_STREAM_CAPTURE)
|
|
return -EINVAL;
|
|
|
|
format = params_format(params);
|
|
host->saved_params.format = format;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int spdif_in_trigger(struct snd_pcm_substream *substream, int cmd,
|
|
struct snd_soc_dai *dai)
|
|
{
|
|
struct spdif_in_dev *host = snd_soc_dai_get_drvdata(dai);
|
|
u32 ctrl;
|
|
int ret = 0;
|
|
|
|
if (substream->stream != SNDRV_PCM_STREAM_CAPTURE)
|
|
return -EINVAL;
|
|
|
|
switch (cmd) {
|
|
case SNDRV_PCM_TRIGGER_START:
|
|
case SNDRV_PCM_TRIGGER_RESUME:
|
|
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
|
|
clk_enable(host->clk);
|
|
spdif_in_configure(host);
|
|
spdif_in_format(host, host->saved_params.format);
|
|
|
|
ctrl = readl(host->io_base + SPDIF_IN_CTRL);
|
|
ctrl |= SPDIF_IN_SAMPLE | SPDIF_IN_ENB;
|
|
writel(ctrl, host->io_base + SPDIF_IN_CTRL);
|
|
writel(0xF, host->io_base + SPDIF_IN_IRQ_MASK);
|
|
break;
|
|
|
|
case SNDRV_PCM_TRIGGER_STOP:
|
|
case SNDRV_PCM_TRIGGER_SUSPEND:
|
|
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
|
|
ctrl = readl(host->io_base + SPDIF_IN_CTRL);
|
|
ctrl &= ~(SPDIF_IN_SAMPLE | SPDIF_IN_ENB);
|
|
writel(ctrl, host->io_base + SPDIF_IN_CTRL);
|
|
writel(0x0, host->io_base + SPDIF_IN_IRQ_MASK);
|
|
|
|
if (host->reset_perip)
|
|
host->reset_perip();
|
|
clk_disable(host->clk);
|
|
break;
|
|
|
|
default:
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static struct snd_soc_dai_ops spdif_in_dai_ops = {
|
|
.startup = spdif_in_startup,
|
|
.shutdown = spdif_in_shutdown,
|
|
.trigger = spdif_in_trigger,
|
|
.hw_params = spdif_in_hw_params,
|
|
};
|
|
|
|
struct snd_soc_dai_driver spdif_in_dai = {
|
|
.capture = {
|
|
.channels_min = 2,
|
|
.channels_max = 2,
|
|
.rates = (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
|
|
SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000 | \
|
|
SNDRV_PCM_RATE_192000),
|
|
.formats = SNDRV_PCM_FMTBIT_S16_LE | \
|
|
SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE,
|
|
},
|
|
.ops = &spdif_in_dai_ops,
|
|
};
|
|
|
|
static irqreturn_t spdif_in_irq(int irq, void *arg)
|
|
{
|
|
struct spdif_in_dev *host = (struct spdif_in_dev *)arg;
|
|
|
|
u32 irq_status = readl(host->io_base + SPDIF_IN_IRQ);
|
|
|
|
if (!irq_status)
|
|
return IRQ_NONE;
|
|
|
|
if (irq_status & SPDIF_IRQ_FIFOWRITE)
|
|
dev_err(host->dev, "spdif in: fifo write error");
|
|
if (irq_status & SPDIF_IRQ_EMPTYFIFOREAD)
|
|
dev_err(host->dev, "spdif in: empty fifo read error");
|
|
if (irq_status & SPDIF_IRQ_FIFOFULL)
|
|
dev_err(host->dev, "spdif in: fifo full error");
|
|
if (irq_status & SPDIF_IRQ_OUTOFRANGE)
|
|
dev_err(host->dev, "spdif in: out of range error");
|
|
|
|
writel(0, host->io_base + SPDIF_IN_IRQ);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int spdif_in_probe(struct platform_device *pdev)
|
|
{
|
|
struct spdif_in_dev *host;
|
|
struct spear_spdif_platform_data *pdata;
|
|
struct resource *res, *res_fifo;
|
|
int ret;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (!res)
|
|
return -EINVAL;
|
|
|
|
res_fifo = platform_get_resource(pdev, IORESOURCE_IO, 0);
|
|
if (!res_fifo)
|
|
return -EINVAL;
|
|
|
|
if (!devm_request_mem_region(&pdev->dev, res->start,
|
|
resource_size(res), pdev->name)) {
|
|
dev_warn(&pdev->dev, "Failed to get memory resourse\n");
|
|
return -ENOENT;
|
|
}
|
|
|
|
host = devm_kzalloc(&pdev->dev, sizeof(*host), GFP_KERNEL);
|
|
if (!host) {
|
|
dev_warn(&pdev->dev, "kzalloc fail\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
host->io_base = devm_ioremap(&pdev->dev, res->start,
|
|
resource_size(res));
|
|
if (!host->io_base) {
|
|
dev_warn(&pdev->dev, "ioremap failed\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
host->irq = platform_get_irq(pdev, 0);
|
|
if (host->irq < 0)
|
|
return -EINVAL;
|
|
|
|
host->clk = clk_get(&pdev->dev, NULL);
|
|
if (IS_ERR(host->clk))
|
|
return PTR_ERR(host->clk);
|
|
|
|
pdata = dev_get_platdata(&pdev->dev);
|
|
|
|
if (!pdata)
|
|
return -EINVAL;
|
|
|
|
host->dma_params.data = pdata->dma_params;
|
|
host->dma_params.addr = res_fifo->start;
|
|
host->dma_params.max_burst = 16;
|
|
host->dma_params.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
|
|
host->dma_params.filter = pdata->filter;
|
|
host->reset_perip = pdata->reset_perip;
|
|
|
|
host->dev = &pdev->dev;
|
|
dev_set_drvdata(&pdev->dev, host);
|
|
|
|
ret = devm_request_irq(&pdev->dev, host->irq, spdif_in_irq, 0,
|
|
"spdif-in", host);
|
|
if (ret) {
|
|
clk_put(host->clk);
|
|
dev_warn(&pdev->dev, "request_irq failed\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = snd_soc_register_dai(&pdev->dev, &spdif_in_dai);
|
|
if (ret != 0) {
|
|
clk_put(host->clk);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int spdif_in_remove(struct platform_device *pdev)
|
|
{
|
|
struct spdif_in_dev *host = dev_get_drvdata(&pdev->dev);
|
|
|
|
snd_soc_unregister_dai(&pdev->dev);
|
|
dev_set_drvdata(&pdev->dev, NULL);
|
|
|
|
clk_put(host->clk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static struct platform_driver spdif_in_driver = {
|
|
.probe = spdif_in_probe,
|
|
.remove = spdif_in_remove,
|
|
.driver = {
|
|
.name = "spdif-in",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
module_platform_driver(spdif_in_driver);
|
|
|
|
MODULE_AUTHOR("Vipin Kumar <vipin.kumar@st.com>");
|
|
MODULE_DESCRIPTION("SPEAr SPDIF IN SoC Interface");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:spdif_in");
|