blob: 4c74a6cca99c5e0684c30a24abdbfc1aa13fa469 [file] [log] [blame]
/*
* linux/sound/soc/m8m/hisi_i2s.c - I2S IP driver
*
* Copyright (C) 2015 Linaro, Ltd
* Author: Andy Green <andy.green@linaro.org>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 2 of the License.
*
* This program is distributed in the hope that 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.
*
* This driver only deals with S2 interface (BT)
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/clk.h>
#include <linux/jiffies.h>
#include <linux/io.h>
#include <linux/gpio.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/dmaengine_pcm.h>
#include <sound/initval.h>
#include <sound/soc.h>
#include <linux/interrupt.h>
#include <linux/reset.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/reset-controller.h>
#include <linux/clk.h>
#include <linux/regulator/consumer.h>
#include "hisi-i2s.h"
struct hisi_i2s {
struct device *dev;
struct reset_control *rc;
int clocks;
struct regulator *regu_asp;
struct pinctrl *pctrl;
struct pinctrl_state *pin_default;
struct pinctrl_state *pin_idle;
struct clk *asp_subsys_clk;
struct snd_soc_dai_driver dai;
void __iomem *base;
void __iomem *base_syscon;
phys_addr_t base_phys;
struct snd_dmaengine_dai_dma_data dma_data[2];
spinlock_t lock;
int rate;
int format;
int bits;
int channels;
u32 master;
u32 status;
};
static void hisi_bits(struct hisi_i2s *i2s, u32 ofs, u32 reset, u32 set)
{
u32 val = readl(i2s->base + ofs) & ~reset;
writel(val | set, i2s->base + ofs);
}
static void hisi_syscon_bits(struct hisi_i2s *i2s, u32 ofs, u32 reset, u32 set)
{
u32 val = readl(i2s->base_syscon + ofs) & ~reset;
writel(val | set, i2s->base_syscon + ofs);
}
static int _hisi_i2s_set_fmt(struct hisi_i2s *i2s,
struct snd_pcm_substream *substream)
{
switch (i2s->format & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM:
i2s->master = false;
hisi_syscon_bits(i2s, HI_ASP_CFG_R_CLK_SEL_REG, 0, HI_ASP_CFG_R_CLK_SEL_EN);
break;
case SND_SOC_DAIFMT_CBS_CFS:
i2s->master = true;
hisi_syscon_bits(i2s, HI_ASP_CFG_R_CLK_SEL_REG, HI_ASP_CFG_R_CLK_SEL_EN,0);
break;
default:
return -EINVAL;
}
return 0;
}
int hisi_i2s_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *cpu_dai)
{
struct hisi_i2s *i2s = dev_get_drvdata(cpu_dai->dev);
/* deassert reset on sio_bt*/
hisi_syscon_bits(i2s, HI_ASP_CFG_R_RST_CTRLDIS_REG, 0,BIT(2)|BIT(6)|BIT(8)|BIT(16));
/* enable clk before frequency division */
hisi_syscon_bits(i2s, HI_ASP_CFG_R_GATE_EN_REG, 0,BIT(5)|BIT(6));
/* enable frequency division */
hisi_syscon_bits(i2s, HI_ASP_CFG_R_GATE_CLKDIV_EN_REG, 0,BIT(2)|BIT(5));
/* select clk */
hisi_syscon_bits(i2s, HI_ASP_CFG_R_CLK_SEL_REG, HI_ASP_MASK,HI_ASP_CFG_R_CLK_SEL);
/* select clk_div */
hisi_syscon_bits(i2s, HI_ASP_CFG_R_CLK1_DIV_REG, HI_ASP_MASK,HI_ASP_CFG_R_CLK1_DIV_SEL);
hisi_syscon_bits(i2s, HI_ASP_CFG_R_CLK4_DIV_REG, HI_ASP_MASK,HI_ASP_CFG_R_CLK4_DIV_SEL);
hisi_syscon_bits(i2s, HI_ASP_CFG_R_CLK6_DIV_REG, HI_ASP_MASK,HI_ASP_CFG_R_CLK6_DIV_SEL);
/* sio config */
hisi_bits(i2s, HI_ASP_SIO_MODE_REG, HI_ASP_MASK, 0x0);
hisi_bits(i2s, HI_ASP_SIO_DATA_WIDTH_SET_REG, HI_ASP_MASK, 0x9);
hisi_bits(i2s, HI_ASP_SIO_I2S_POS_MERGE_EN_REG, HI_ASP_MASK, 0x1);
hisi_bits(i2s, HI_ASP_SIO_I2S_START_POS_REG, HI_ASP_MASK, 0x0);
return 0;
}
void hisi_i2s_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *cpu_dai)
{
struct hisi_i2s *i2s = dev_get_drvdata(cpu_dai->dev);
if (!IS_ERR_OR_NULL(i2s->asp_subsys_clk)) {
clk_disable_unprepare(i2s->asp_subsys_clk);
}
}
static void hisi_i2s_txctrl(struct snd_soc_dai *cpu_dai, int on)
{
struct hisi_i2s *i2s = dev_get_drvdata(cpu_dai->dev);
spin_lock(&i2s->lock);
if (on) {
/* enable SIO TX */
hisi_bits(i2s, HI_ASP_SIO_CT_SET_REG, 0,
HI_ASP_SIO_TX_ENABLE | HI_ASP_SIO_TX_DATA_MERGE | HI_ASP_SIO_TX_FIFO_THRESHOLD |
HI_ASP_SIO_RX_ENABLE |HI_ASP_SIO_RX_DATA_MERGE | HI_ASP_SIO_RX_FIFO_THRESHOLD);
} else
/* disable SIO TX */
hisi_bits(i2s, HI_ASP_SIO_CT_CLR_REG, 0, HI_ASP_SIO_TX_ENABLE |HI_ASP_SIO_RX_ENABLE);
spin_unlock(&i2s->lock);
}
static void hisi_i2s_rxctrl(struct snd_soc_dai *cpu_dai, int on)
{
struct hisi_i2s *i2s = dev_get_drvdata(cpu_dai->dev);
spin_lock(&i2s->lock);
if (on)
/* enable SIO RX */
hisi_bits(i2s, HI_ASP_SIO_CT_SET_REG, 0,
HI_ASP_SIO_TX_ENABLE | HI_ASP_SIO_TX_DATA_MERGE | HI_ASP_SIO_TX_FIFO_THRESHOLD |
HI_ASP_SIO_RX_ENABLE |HI_ASP_SIO_RX_DATA_MERGE | HI_ASP_SIO_RX_FIFO_THRESHOLD);
else
/* disable SIO RX */
hisi_bits(i2s, HI_ASP_SIO_CT_CLR_REG,0, HI_ASP_SIO_TX_ENABLE |HI_ASP_SIO_RX_ENABLE);
spin_unlock(&i2s->lock);
}
static int hisi_i2s_set_sysclk(struct snd_soc_dai *cpu_dai,
int clk_id, unsigned int freq, int dir)
{
return 0;
}
static int hisi_i2s_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt)
{
struct hisi_i2s *i2s = dev_get_drvdata(cpu_dai->dev);
i2s->format = fmt;
i2s->master = (i2s->format & SND_SOC_DAIFMT_MASTER_MASK) ==
SND_SOC_DAIFMT_CBS_CFS;
return 0;
}
static int hisi_i2s_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *cpu_dai)
{
struct hisi_i2s *i2s = dev_get_drvdata(cpu_dai->dev);
struct snd_dmaengine_dai_dma_data *dma_data;
dma_data = snd_soc_dai_get_dma_data(cpu_dai, substream);
_hisi_i2s_set_fmt(i2s, substream);
dma_data->maxburst = 4;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
dma_data->addr = i2s->base_phys + HI_ASP_SIO_I2S_DUAL_TX_CHN_REG;
else
dma_data->addr = i2s->base_phys + HI_ASP_SIO_I2S_DUAL_RX_CHN_REG;
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_U16_LE:
case SNDRV_PCM_FORMAT_S16_LE:
i2s->bits = 16;
dma_data->addr_width = 4;
break;
case SNDRV_PCM_FORMAT_U24_LE:
case SNDRV_PCM_FORMAT_S24_LE:
i2s->bits = 32;
dma_data->addr_width = 4;
break;
default:
dev_err(cpu_dai->dev, "Bad format\n");
return -EINVAL;
}
return 0;
}
static int hisi_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *cpu_dai)
{
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
hisi_i2s_rxctrl(cpu_dai, 1);
else
hisi_i2s_txctrl(cpu_dai, 1);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
hisi_i2s_rxctrl(cpu_dai, 0);
else
hisi_i2s_txctrl(cpu_dai, 0);
break;
default:
dev_err(cpu_dai->dev, "uknown cmd\n");
return -EINVAL;
}
return 0;
}
static int hisi_i2s_dai_probe(struct snd_soc_dai *dai)
{
struct hisi_i2s *i2s = snd_soc_dai_get_drvdata(dai);
snd_soc_dai_init_dma_data(dai,
&i2s->dma_data[SNDRV_PCM_STREAM_PLAYBACK],
&i2s->dma_data[SNDRV_PCM_STREAM_CAPTURE]);
return 0;
}
static struct snd_soc_dai_ops hisi_i2s_dai_ops = {
.trigger = hisi_i2s_trigger,
.hw_params = hisi_i2s_hw_params,
.set_fmt = hisi_i2s_set_fmt,
.set_sysclk = hisi_i2s_set_sysclk,
.startup = hisi_i2s_startup,
.shutdown = hisi_i2s_shutdown,
};
struct snd_soc_dai_driver hisi_i2s_dai_init = {
.name = "hisi_i2s",
.probe = hisi_i2s_dai_probe,
.playback = {
.channels_min = 2,
.channels_max = 2,
.formats = SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_U16_LE,
.rates = SNDRV_PCM_RATE_48000,
},
.capture = {
.channels_min = 2,
.channels_max = 2,
.formats = SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_U16_LE,
.rates = SNDRV_PCM_RATE_48000,
},
.ops = &hisi_i2s_dai_ops,
};
static const struct snd_soc_component_driver hisi_i2s_i2s_comp = {
.name = "hisi_i2s-i2s",
};
#include <sound/dmaengine_pcm.h>
static const struct snd_pcm_hardware snd_hisi_hardware = {
.info = SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_PAUSE |
SNDRV_PCM_INFO_RESUME |
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_HALF_DUPLEX,
.period_bytes_min = 4096,
.period_bytes_max = 4096,
.periods_min = 4,
.periods_max = UINT_MAX,
.buffer_bytes_max = SIZE_MAX,
};
static const struct snd_dmaengine_pcm_config hisi_dmaengine_pcm_config = {
.pcm_hardware = &snd_hisi_hardware,
.prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
.prealloc_buffer_size = 64 * 1024,
};
static int hisi_i2s_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct hisi_i2s *i2s;
struct resource *res;
int ret;
i2s = devm_kzalloc(dev,sizeof(*i2s), GFP_KERNEL);
if (!i2s)
return -ENOMEM;
i2s->dev = dev;
spin_lock_init(&i2s->lock);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
ret = -ENODEV;
return ret;
}
i2s->base_phys = (phys_addr_t)res->start;
i2s->dai = hisi_i2s_dai_init;
dev_set_drvdata(&pdev->dev, i2s);
i2s->base = devm_ioremap_resource(dev, res);
if (IS_ERR(i2s->base)) {
dev_err(&pdev->dev, "ioremap failed\n");
ret = PTR_ERR(i2s->base);
return ret;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
if (!res) {
ret = -ENODEV;
return ret;
}
i2s->base_syscon = devm_ioremap(dev, res->start, resource_size(res));
if (IS_ERR(i2s->base_syscon)) {
dev_err(&pdev->dev, "ioremap failed\n");
ret = PTR_ERR(i2s->base_syscon);
return ret;
}
/* i2s iomux config */
i2s->pctrl = devm_pinctrl_get(dev);
if (IS_ERR(i2s->pctrl)) {
dev_err(dev, "could not get pinctrl\n");
ret = -EIO;
return ret;
}
i2s->pin_default = pinctrl_lookup_state(i2s->pctrl, PINCTRL_STATE_DEFAULT);
if (IS_ERR(i2s->pin_default)) {
dev_err(dev, "could not get default state (%li)\n" , PTR_ERR(i2s->pin_default));
ret = -EIO;
return ret;
}
if (pinctrl_select_state(i2s->pctrl, i2s->pin_default)) {
dev_err(dev, "could not set pins to default state\n");
ret = -EIO;
return ret;
}
ret = devm_snd_dmaengine_pcm_register(&pdev->dev,
&hisi_dmaengine_pcm_config,
0);
if (ret)
return ret;
ret = snd_soc_register_component(&pdev->dev, &hisi_i2s_i2s_comp,
&i2s->dai, 1);
if (ret) {
dev_err(&pdev->dev, "Failed to register dai\n");
return ret;;
}
dev_info(&pdev->dev, "Registered as %s\n", i2s->dai.name);
return 0;
}
static int hisi_i2s_remove(struct platform_device *pdev)
{
struct hisi_i2s *i2s = dev_get_drvdata(&pdev->dev);
snd_soc_unregister_component(&pdev->dev);
dev_set_drvdata(&pdev->dev, NULL);
pinctrl_put(i2s->pctrl);
return 0;
}
static const struct of_device_id hisi_i2s_dt_ids[] = {
{ .compatible = "hisilicon,hisi-i2s" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, hisi_i2s_dt_ids);
static struct platform_driver hisi_i2s_driver = {
.probe = hisi_i2s_probe,
.remove = hisi_i2s_remove,
.driver = {
.name = "hisi_i2s",
.owner = THIS_MODULE,
.of_match_table = hisi_i2s_dt_ids,
},
};
module_platform_driver(hisi_i2s_driver);
MODULE_DESCRIPTION("Hisilicon I2S driver");
MODULE_AUTHOR("Andy Green <andy.green@linaro.org>");
MODULE_LICENSE("GPL");