a8e940222b
This patch syncs naming rule. - xxx_rates; + xxx_rate; - xxx_samplebits; + xxx_sample_bits; Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Link: https://lore.kernel.org/r/87r1mmolie.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Mark Brown <broonie@kernel.org>
318 lines
8.5 KiB
C
318 lines
8.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
// linux/sound/bcm/bcm63xx-i2s-whistler.c
|
|
// BCM63xx whistler i2s driver
|
|
// Copyright (c) 2020 Broadcom Corporation
|
|
// Author: Kevin-Ke Li <kevin-ke.li@broadcom.com>
|
|
|
|
#include <linux/clk.h>
|
|
#include <linux/dma-mapping.h>
|
|
#include <linux/io.h>
|
|
#include <linux/module.h>
|
|
#include <linux/regmap.h>
|
|
#include <sound/pcm_params.h>
|
|
#include <sound/soc.h>
|
|
#include "bcm63xx-i2s.h"
|
|
|
|
#define DRV_NAME "brcm-i2s"
|
|
|
|
static bool brcm_i2s_wr_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case I2S_TX_CFG ... I2S_TX_DESC_IFF_LEN:
|
|
case I2S_TX_CFG_2 ... I2S_RX_DESC_IFF_LEN:
|
|
case I2S_RX_CFG_2 ... I2S_REG_MAX:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static bool brcm_i2s_rd_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case I2S_TX_CFG ... I2S_REG_MAX:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static bool brcm_i2s_volatile_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case I2S_TX_CFG:
|
|
case I2S_TX_IRQ_CTL:
|
|
case I2S_TX_DESC_IFF_ADDR:
|
|
case I2S_TX_DESC_IFF_LEN:
|
|
case I2S_TX_DESC_OFF_ADDR:
|
|
case I2S_TX_DESC_OFF_LEN:
|
|
case I2S_TX_CFG_2:
|
|
case I2S_RX_CFG:
|
|
case I2S_RX_IRQ_CTL:
|
|
case I2S_RX_DESC_OFF_ADDR:
|
|
case I2S_RX_DESC_OFF_LEN:
|
|
case I2S_RX_DESC_IFF_LEN:
|
|
case I2S_RX_DESC_IFF_ADDR:
|
|
case I2S_RX_CFG_2:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static const struct regmap_config brcm_i2s_regmap_config = {
|
|
.reg_bits = 32,
|
|
.reg_stride = 4,
|
|
.val_bits = 32,
|
|
.max_register = I2S_REG_MAX,
|
|
.writeable_reg = brcm_i2s_wr_reg,
|
|
.readable_reg = brcm_i2s_rd_reg,
|
|
.volatile_reg = brcm_i2s_volatile_reg,
|
|
.cache_type = REGCACHE_FLAT,
|
|
};
|
|
|
|
static int bcm63xx_i2s_hw_params(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_hw_params *params,
|
|
struct snd_soc_dai *dai)
|
|
{
|
|
int ret = 0;
|
|
struct bcm_i2s_priv *i2s_priv = snd_soc_dai_get_drvdata(dai);
|
|
|
|
ret = clk_set_rate(i2s_priv->i2s_clk, params_rate(params));
|
|
if (ret < 0)
|
|
dev_err(i2s_priv->dev,
|
|
"Can't set sample rate, err: %d\n", ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int bcm63xx_i2s_startup(struct snd_pcm_substream *substream,
|
|
struct snd_soc_dai *dai)
|
|
{
|
|
unsigned int slavemode;
|
|
struct bcm_i2s_priv *i2s_priv = snd_soc_dai_get_drvdata(dai);
|
|
struct regmap *regmap_i2s = i2s_priv->regmap_i2s;
|
|
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
|
regmap_update_bits(regmap_i2s, I2S_TX_CFG,
|
|
I2S_TX_OUT_R | I2S_TX_DATA_ALIGNMENT |
|
|
I2S_TX_DATA_ENABLE | I2S_TX_CLOCK_ENABLE,
|
|
I2S_TX_OUT_R | I2S_TX_DATA_ALIGNMENT |
|
|
I2S_TX_DATA_ENABLE | I2S_TX_CLOCK_ENABLE);
|
|
regmap_write(regmap_i2s, I2S_TX_IRQ_CTL, 0);
|
|
regmap_write(regmap_i2s, I2S_TX_IRQ_IFF_THLD, 0);
|
|
regmap_write(regmap_i2s, I2S_TX_IRQ_OFF_THLD, 1);
|
|
|
|
/* TX and RX block each have an independent bit to indicate
|
|
* if it is generating the clock for the I2S bus. The bus
|
|
* clocks need to be generated from either the TX or RX block,
|
|
* but not both
|
|
*/
|
|
regmap_read(regmap_i2s, I2S_RX_CFG_2, &slavemode);
|
|
if (slavemode & I2S_RX_SLAVE_MODE_MASK)
|
|
regmap_update_bits(regmap_i2s, I2S_TX_CFG_2,
|
|
I2S_TX_SLAVE_MODE_MASK,
|
|
I2S_TX_MASTER_MODE);
|
|
else
|
|
regmap_update_bits(regmap_i2s, I2S_TX_CFG_2,
|
|
I2S_TX_SLAVE_MODE_MASK,
|
|
I2S_TX_SLAVE_MODE);
|
|
} else {
|
|
regmap_update_bits(regmap_i2s, I2S_RX_CFG,
|
|
I2S_RX_IN_R | I2S_RX_DATA_ALIGNMENT |
|
|
I2S_RX_CLOCK_ENABLE,
|
|
I2S_RX_IN_R | I2S_RX_DATA_ALIGNMENT |
|
|
I2S_RX_CLOCK_ENABLE);
|
|
regmap_write(regmap_i2s, I2S_RX_IRQ_CTL, 0);
|
|
regmap_write(regmap_i2s, I2S_RX_IRQ_IFF_THLD, 0);
|
|
regmap_write(regmap_i2s, I2S_RX_IRQ_OFF_THLD, 1);
|
|
|
|
regmap_read(regmap_i2s, I2S_TX_CFG_2, &slavemode);
|
|
if (slavemode & I2S_TX_SLAVE_MODE_MASK)
|
|
regmap_update_bits(regmap_i2s, I2S_RX_CFG_2,
|
|
I2S_RX_SLAVE_MODE_MASK, 0);
|
|
else
|
|
regmap_update_bits(regmap_i2s, I2S_RX_CFG_2,
|
|
I2S_RX_SLAVE_MODE_MASK,
|
|
I2S_RX_SLAVE_MODE);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void bcm63xx_i2s_shutdown(struct snd_pcm_substream *substream,
|
|
struct snd_soc_dai *dai)
|
|
{
|
|
unsigned int enabled, slavemode;
|
|
struct bcm_i2s_priv *i2s_priv = snd_soc_dai_get_drvdata(dai);
|
|
struct regmap *regmap_i2s = i2s_priv->regmap_i2s;
|
|
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
|
regmap_update_bits(regmap_i2s, I2S_TX_CFG,
|
|
I2S_TX_OUT_R | I2S_TX_DATA_ALIGNMENT |
|
|
I2S_TX_DATA_ENABLE | I2S_TX_CLOCK_ENABLE, 0);
|
|
regmap_write(regmap_i2s, I2S_TX_IRQ_CTL, 1);
|
|
regmap_write(regmap_i2s, I2S_TX_IRQ_IFF_THLD, 4);
|
|
regmap_write(regmap_i2s, I2S_TX_IRQ_OFF_THLD, 4);
|
|
|
|
regmap_read(regmap_i2s, I2S_TX_CFG_2, &slavemode);
|
|
slavemode = slavemode & I2S_TX_SLAVE_MODE_MASK;
|
|
if (!slavemode) {
|
|
regmap_read(regmap_i2s, I2S_RX_CFG, &enabled);
|
|
enabled = enabled & I2S_RX_ENABLE_MASK;
|
|
if (enabled)
|
|
regmap_update_bits(regmap_i2s, I2S_RX_CFG_2,
|
|
I2S_RX_SLAVE_MODE_MASK,
|
|
I2S_RX_MASTER_MODE);
|
|
}
|
|
regmap_update_bits(regmap_i2s, I2S_TX_CFG_2,
|
|
I2S_TX_SLAVE_MODE_MASK,
|
|
I2S_TX_SLAVE_MODE);
|
|
} else {
|
|
regmap_update_bits(regmap_i2s, I2S_RX_CFG,
|
|
I2S_RX_IN_R | I2S_RX_DATA_ALIGNMENT |
|
|
I2S_RX_CLOCK_ENABLE, 0);
|
|
regmap_write(regmap_i2s, I2S_RX_IRQ_CTL, 1);
|
|
regmap_write(regmap_i2s, I2S_RX_IRQ_IFF_THLD, 4);
|
|
regmap_write(regmap_i2s, I2S_RX_IRQ_OFF_THLD, 4);
|
|
|
|
regmap_read(regmap_i2s, I2S_RX_CFG_2, &slavemode);
|
|
slavemode = slavemode & I2S_RX_SLAVE_MODE_MASK;
|
|
if (!slavemode) {
|
|
regmap_read(regmap_i2s, I2S_TX_CFG, &enabled);
|
|
enabled = enabled & I2S_TX_ENABLE_MASK;
|
|
if (enabled)
|
|
regmap_update_bits(regmap_i2s, I2S_TX_CFG_2,
|
|
I2S_TX_SLAVE_MODE_MASK,
|
|
I2S_TX_MASTER_MODE);
|
|
}
|
|
|
|
regmap_update_bits(regmap_i2s, I2S_RX_CFG_2,
|
|
I2S_RX_SLAVE_MODE_MASK, I2S_RX_SLAVE_MODE);
|
|
}
|
|
}
|
|
|
|
static const struct snd_soc_dai_ops bcm63xx_i2s_dai_ops = {
|
|
.startup = bcm63xx_i2s_startup,
|
|
.shutdown = bcm63xx_i2s_shutdown,
|
|
.hw_params = bcm63xx_i2s_hw_params,
|
|
};
|
|
|
|
static struct snd_soc_dai_driver bcm63xx_i2s_dai = {
|
|
.name = DRV_NAME,
|
|
.playback = {
|
|
.channels_min = 2,
|
|
.channels_max = 2,
|
|
.rates = SNDRV_PCM_RATE_8000_192000,
|
|
.formats = SNDRV_PCM_FMTBIT_S32_LE,
|
|
},
|
|
.capture = {
|
|
.channels_min = 2,
|
|
.channels_max = 2,
|
|
.rates = SNDRV_PCM_RATE_8000_192000,
|
|
.formats = SNDRV_PCM_FMTBIT_S32_LE,
|
|
},
|
|
.ops = &bcm63xx_i2s_dai_ops,
|
|
.symmetric_rate = 1,
|
|
.symmetric_channels = 1,
|
|
};
|
|
|
|
static const struct snd_soc_component_driver bcm63xx_i2s_component = {
|
|
.name = "bcm63xx",
|
|
};
|
|
|
|
static int bcm63xx_i2s_dev_probe(struct platform_device *pdev)
|
|
{
|
|
int ret = 0;
|
|
void __iomem *regs;
|
|
struct resource *r_mem, *region;
|
|
struct bcm_i2s_priv *i2s_priv;
|
|
struct regmap *regmap_i2s;
|
|
struct clk *i2s_clk;
|
|
|
|
i2s_priv = devm_kzalloc(&pdev->dev, sizeof(*i2s_priv), GFP_KERNEL);
|
|
if (!i2s_priv)
|
|
return -ENOMEM;
|
|
|
|
i2s_clk = devm_clk_get(&pdev->dev, "i2sclk");
|
|
if (IS_ERR(i2s_clk)) {
|
|
dev_err(&pdev->dev, "%s: cannot get a brcm clock: %ld\n",
|
|
__func__, PTR_ERR(i2s_clk));
|
|
return PTR_ERR(i2s_clk);
|
|
}
|
|
|
|
r_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (!r_mem) {
|
|
dev_err(&pdev->dev, "Unable to get register resource.\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
region = devm_request_mem_region(&pdev->dev, r_mem->start,
|
|
resource_size(r_mem), DRV_NAME);
|
|
if (!region) {
|
|
dev_err(&pdev->dev, "Memory region already claimed\n");
|
|
return -EBUSY;
|
|
}
|
|
|
|
regs = devm_ioremap_resource(&pdev->dev, r_mem);
|
|
if (IS_ERR(regs)) {
|
|
ret = PTR_ERR(regs);
|
|
return ret;
|
|
}
|
|
|
|
regmap_i2s = devm_regmap_init_mmio(&pdev->dev,
|
|
regs, &brcm_i2s_regmap_config);
|
|
if (IS_ERR(regmap_i2s))
|
|
return PTR_ERR(regmap_i2s);
|
|
|
|
regmap_update_bits(regmap_i2s, I2S_MISC_CFG,
|
|
I2S_PAD_LVL_LOOP_DIS_MASK,
|
|
I2S_PAD_LVL_LOOP_DIS_ENABLE);
|
|
|
|
ret = devm_snd_soc_register_component(&pdev->dev,
|
|
&bcm63xx_i2s_component,
|
|
&bcm63xx_i2s_dai, 1);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to register the dai\n");
|
|
return ret;
|
|
}
|
|
|
|
i2s_priv->dev = &pdev->dev;
|
|
i2s_priv->i2s_clk = i2s_clk;
|
|
i2s_priv->regmap_i2s = regmap_i2s;
|
|
dev_set_drvdata(&pdev->dev, i2s_priv);
|
|
|
|
ret = bcm63xx_soc_platform_probe(pdev, i2s_priv);
|
|
if (ret)
|
|
dev_err(&pdev->dev, "failed to register the pcm\n");
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int bcm63xx_i2s_dev_remove(struct platform_device *pdev)
|
|
{
|
|
bcm63xx_soc_platform_remove(pdev);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_OF
|
|
static const struct of_device_id snd_soc_bcm_audio_match[] = {
|
|
{.compatible = "brcm,bcm63xx-i2s"},
|
|
{ }
|
|
};
|
|
#endif
|
|
|
|
static struct platform_driver bcm63xx_i2s_driver = {
|
|
.driver = {
|
|
.name = DRV_NAME,
|
|
.of_match_table = of_match_ptr(snd_soc_bcm_audio_match),
|
|
},
|
|
.probe = bcm63xx_i2s_dev_probe,
|
|
.remove = bcm63xx_i2s_dev_remove,
|
|
};
|
|
|
|
module_platform_driver(bcm63xx_i2s_driver);
|
|
|
|
MODULE_AUTHOR("Kevin,Li <kevin-ke.li@broadcom.com>");
|
|
MODULE_DESCRIPTION("Broadcom DSL XPON ASOC I2S Interface");
|
|
MODULE_LICENSE("GPL v2");
|