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// SPDX-License-Identifier: GPL-2.0
//
// Socionext UniPhier AIO ALSA CPU DAI driver.
//
// Copyright (c) 2016-2018 Socionext Inc.
//
// 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.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, see <http://www.gnu.org/licenses/>.
#include <linux/clk.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/reset.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include "aio.h"
static bool is_valid_pll(struct uniphier_aio_chip *chip, int pll_id)
{
struct device *dev = &chip->pdev->dev;
if (pll_id < 0 || chip->num_plls <= pll_id) {
dev_err(dev, "PLL(%d) is not supported\n", pll_id);
return false;
}
return chip->plls[pll_id].enable;
}
static bool match_spec(const struct uniphier_aio_spec *spec,
const char *name, int dir)
{
if (dir == SNDRV_PCM_STREAM_PLAYBACK &&
spec->swm.dir != PORT_DIR_OUTPUT) {
return false;
}
if (dir == SNDRV_PCM_STREAM_CAPTURE &&
spec->swm.dir != PORT_DIR_INPUT) {
return false;
}
if (spec->name && strcmp(spec->name, name) == 0)
return true;
if (spec->gname && strcmp(spec->gname, name) == 0)
return true;
return false;
}
/**
* find_spec - find HW specification info by name
* @aio: the AIO device pointer
* @name: name of device
* @direction: the direction of substream, SNDRV_PCM_STREAM_*
*
* Find hardware specification information from list by device name. This
* information is used for telling the difference of SoCs to driver.
*
* Specification list is array of 'struct uniphier_aio_spec' which is defined
* in each drivers (see: aio-i2s.c).
*
* Return: The pointer of hardware specification of AIO if successful,
* otherwise NULL on error.
*/
static const struct uniphier_aio_spec *find_spec(struct uniphier_aio *aio,
const char *name,
int direction)
{
const struct uniphier_aio_chip_spec *chip_spec = aio->chip->chip_spec;
int i;
for (i = 0; i < chip_spec->num_specs; i++) {
const struct uniphier_aio_spec *spec = &chip_spec->specs[i];
if (match_spec(spec, name, direction))
return spec;
}
return NULL;
}
/**
* find_divider - find clock divider by frequency
* @aio: the AIO device pointer
* @pll_id: PLL ID, should be AUD_PLL_XX
* @freq: required frequency
*
* Find suitable clock divider by frequency.
*
* Return: The ID of PLL if successful, otherwise negative error value.
*/
static int find_divider(struct uniphier_aio *aio, int pll_id, unsigned int freq)
{
struct uniphier_aio_pll *pll;
int mul[] = { 1, 1, 1, 2, };
int div[] = { 2, 3, 1, 3, };
int i;
if (!is_valid_pll(aio->chip, pll_id))
return -EINVAL;
pll = &aio->chip->plls[pll_id];
for (i = 0; i < ARRAY_SIZE(mul); i++)
if (pll->freq * mul[i] / div[i] == freq)
return i;
return -ENOTSUPP;
}
static int uniphier_aio_set_sysclk(struct snd_soc_dai *dai, int clk_id,
unsigned int freq, int dir)
{
struct uniphier_aio *aio = uniphier_priv(dai);
struct device *dev = &aio->chip->pdev->dev;
bool pll_auto = false;
int pll_id, div_id;
switch (clk_id) {
case AUD_CLK_IO:
return -ENOTSUPP;
case AUD_CLK_A1:
pll_id = AUD_PLL_A1;
break;
case AUD_CLK_F1:
pll_id = AUD_PLL_F1;
break;
case AUD_CLK_A2:
pll_id = AUD_PLL_A2;
break;
case AUD_CLK_F2:
pll_id = AUD_PLL_F2;
break;
case AUD_CLK_A:
pll_id = AUD_PLL_A1;
pll_auto = true;
break;
case AUD_CLK_F:
pll_id = AUD_PLL_F1;
pll_auto = true;
break;
case AUD_CLK_APLL:
pll_id = AUD_PLL_APLL;
break;
case AUD_CLK_RX0:
pll_id = AUD_PLL_RX0;
break;
case AUD_CLK_USB0:
pll_id = AUD_PLL_USB0;
break;
case AUD_CLK_HSC0:
pll_id = AUD_PLL_HSC0;
break;
default:
dev_err(dev, "Sysclk(%d) is not supported\n", clk_id);
return -EINVAL;
}
if (pll_auto) {
for (pll_id = 0; pll_id < aio->chip->num_plls; pll_id++) {
div_id = find_divider(aio, pll_id, freq);
if (div_id >= 0) {
aio->plldiv = div_id;
break;
}
}
if (pll_id == aio->chip->num_plls) {
dev_err(dev, "Sysclk frequency is not supported(%d)\n",
freq);
return -EINVAL;
}
}
if (dir == SND_SOC_CLOCK_OUT)
aio->pll_out = pll_id;
else
aio->pll_in = pll_id;
return 0;
}
static int uniphier_aio_set_pll(struct snd_soc_dai *dai, int pll_id,
int source, unsigned int freq_in,
unsigned int freq_out)
{
struct uniphier_aio *aio = uniphier_priv(dai);
struct device *dev = &aio->chip->pdev->dev;
int ret;
if (!is_valid_pll(aio->chip, pll_id))
return -EINVAL;
if (!aio->chip->plls[pll_id].enable) {
dev_err(dev, "PLL(%d) is not implemented\n", pll_id);
return -ENOTSUPP;
}
ret = aio_chip_set_pll(aio->chip, pll_id, freq_out);
if (ret < 0)
return ret;
return 0;
}
static int uniphier_aio_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
struct uniphier_aio *aio = uniphier_priv(dai);
struct device *dev = &aio->chip->pdev->dev;
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_LEFT_J:
case SND_SOC_DAIFMT_RIGHT_J:
case SND_SOC_DAIFMT_I2S:
aio->fmt = fmt & SND_SOC_DAIFMT_FORMAT_MASK;
break;
default:
dev_err(dev, "Format is not supported(%d)\n",
fmt & SND_SOC_DAIFMT_FORMAT_MASK);
return -EINVAL;
}
return 0;
}
static int uniphier_aio_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct uniphier_aio *aio = uniphier_priv(dai);
struct uniphier_aio_sub *sub = &aio->sub[substream->stream];
int ret;
sub->substream = substream;
sub->pass_through = 0;
sub->use_mmap = true;
ret = aio_init(sub);
if (ret)
return ret;
return 0;
}
static void uniphier_aio_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct uniphier_aio *aio = uniphier_priv(dai);
struct uniphier_aio_sub *sub = &aio->sub[substream->stream];
sub->substream = NULL;
}
static int uniphier_aio_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct uniphier_aio *aio = uniphier_priv(dai);
struct uniphier_aio_sub *sub = &aio->sub[substream->stream];
struct device *dev = &aio->chip->pdev->dev;
int freq, ret;
switch (params_rate(params)) {
case 48000:
case 32000:
case 24000:
freq = 12288000;
break;
case 44100:
case 22050:
freq = 11289600;
break;
default:
dev_err(dev, "Rate is not supported(%d)\n",
params_rate(params));
return -EINVAL;
}
ret = snd_soc_dai_set_sysclk(dai, AUD_CLK_A,
freq, SND_SOC_CLOCK_OUT);
if (ret)
return ret;
sub->params = *params;
sub->setting = 1;
aio_port_reset(sub);
aio_src_reset(sub);
return 0;
}
static int uniphier_aio_hw_free(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct uniphier_aio *aio = uniphier_priv(dai);
struct uniphier_aio_sub *sub = &aio->sub[substream->stream];
sub->setting = 0;
return 0;
}
static int uniphier_aio_prepare(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct uniphier_aio *aio = uniphier_priv(dai);
struct uniphier_aio_sub *sub = &aio->sub[substream->stream];
int ret;
ret = aio_port_set_param(sub, sub->pass_through, &sub->params);
if (ret)
return ret;
ret = aio_src_set_param(sub, &sub->params);
if (ret)
return ret;
aio_port_set_enable(sub, 1);
ret = aio_if_set_param(sub, sub->pass_through);
if (ret)
return ret;
if (sub->swm->type == PORT_TYPE_CONV) {
ret = aio_srcif_set_param(sub);
if (ret)
return ret;
ret = aio_srcch_set_param(sub);
if (ret)
return ret;
aio_srcch_set_enable(sub, 1);
}
return 0;
}
const struct snd_soc_dai_ops uniphier_aio_i2s_ops = {
.set_sysclk = uniphier_aio_set_sysclk,
.set_pll = uniphier_aio_set_pll,
.set_fmt = uniphier_aio_set_fmt,
.startup = uniphier_aio_startup,
.shutdown = uniphier_aio_shutdown,
.hw_params = uniphier_aio_hw_params,
.hw_free = uniphier_aio_hw_free,
.prepare = uniphier_aio_prepare,
};
EXPORT_SYMBOL_GPL(uniphier_aio_i2s_ops);
const struct snd_soc_dai_ops uniphier_aio_spdif_ops = {
.set_sysclk = uniphier_aio_set_sysclk,
.set_pll = uniphier_aio_set_pll,
.startup = uniphier_aio_startup,
.shutdown = uniphier_aio_shutdown,
.hw_params = uniphier_aio_hw_params,
.hw_free = uniphier_aio_hw_free,
.prepare = uniphier_aio_prepare,
};
EXPORT_SYMBOL_GPL(uniphier_aio_spdif_ops);
int uniphier_aio_dai_probe(struct snd_soc_dai *dai)
{
struct uniphier_aio *aio = uniphier_priv(dai);
int i;
for (i = 0; i < ARRAY_SIZE(aio->sub); i++) {
struct uniphier_aio_sub *sub = &aio->sub[i];
const struct uniphier_aio_spec *spec;
spec = find_spec(aio, dai->name, i);
if (!spec)
continue;
sub->swm = &spec->swm;
sub->spec = spec;
}
aio_iecout_set_enable(aio->chip, true);
aio_chip_init(aio->chip);
aio->chip->active = 1;
return 0;
}
EXPORT_SYMBOL_GPL(uniphier_aio_dai_probe);
int uniphier_aio_dai_remove(struct snd_soc_dai *dai)
{
struct uniphier_aio *aio = uniphier_priv(dai);
aio->chip->active = 0;
return 0;
}
EXPORT_SYMBOL_GPL(uniphier_aio_dai_remove);
int uniphier_aio_dai_suspend(struct snd_soc_dai *dai)
{
struct uniphier_aio *aio = uniphier_priv(dai);
reset_control_assert(aio->chip->rst);
clk_disable_unprepare(aio->chip->clk);
return 0;
}
EXPORT_SYMBOL_GPL(uniphier_aio_dai_suspend);
int uniphier_aio_dai_resume(struct snd_soc_dai *dai)
{
struct uniphier_aio *aio = uniphier_priv(dai);
int ret, i;
if (!aio->chip->active)
return 0;
ret = clk_prepare_enable(aio->chip->clk);
if (ret)
return ret;
ret = reset_control_deassert(aio->chip->rst);
if (ret)
goto err_out_clock;
aio_iecout_set_enable(aio->chip, true);
aio_chip_init(aio->chip);
for (i = 0; i < ARRAY_SIZE(aio->sub); i++) {
struct uniphier_aio_sub *sub = &aio->sub[i];
if (!sub->spec || !sub->substream)
continue;
ret = aio_init(sub);
if (ret)
goto err_out_clock;
if (!sub->setting)
continue;
aio_port_reset(sub);
aio_src_reset(sub);
}
return 0;
err_out_clock:
clk_disable_unprepare(aio->chip->clk);
return ret;
}
EXPORT_SYMBOL_GPL(uniphier_aio_dai_resume);
static const struct snd_soc_component_driver uniphier_aio_component = {
.name = "uniphier-aio",
};
int uniphier_aio_probe(struct platform_device *pdev)
{
struct uniphier_aio_chip *chip;
struct device *dev = &pdev->dev;
int ret, i, j;
chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
if (!chip)
return -ENOMEM;
chip->chip_spec = of_device_get_match_data(dev);
if (!chip->chip_spec)
return -EINVAL;
chip->regmap_sg = syscon_regmap_lookup_by_phandle(dev->of_node,
"socionext,syscon");
if (IS_ERR(chip->regmap_sg)) {
if (PTR_ERR(chip->regmap_sg) == -EPROBE_DEFER)
return -EPROBE_DEFER;
chip->regmap_sg = NULL;
}
chip->clk = devm_clk_get(dev, "aio");
if (IS_ERR(chip->clk))
return PTR_ERR(chip->clk);
chip->rst = devm_reset_control_get_shared(dev, "aio");
if (IS_ERR(chip->rst))
return PTR_ERR(chip->rst);
chip->num_aios = chip->chip_spec->num_dais;
chip->aios = devm_kzalloc(dev,
sizeof(struct uniphier_aio) * chip->num_aios,
GFP_KERNEL);
if (!chip->aios)
return -ENOMEM;
chip->num_plls = chip->chip_spec->num_plls;
chip->plls = devm_kzalloc(dev, sizeof(struct uniphier_aio_pll) *
chip->num_plls, GFP_KERNEL);
if (!chip->plls)
return -ENOMEM;
memcpy(chip->plls, chip->chip_spec->plls,
sizeof(struct uniphier_aio_pll) * chip->num_plls);
for (i = 0; i < chip->num_aios; i++) {
struct uniphier_aio *aio = &chip->aios[i];
aio->chip = chip;
aio->fmt = SND_SOC_DAIFMT_I2S;
for (j = 0; j < ARRAY_SIZE(aio->sub); j++) {
struct uniphier_aio_sub *sub = &aio->sub[j];
sub->aio = aio;
spin_lock_init(&sub->lock);
}
}
chip->pdev = pdev;
platform_set_drvdata(pdev, chip);
ret = clk_prepare_enable(chip->clk);
if (ret)
return ret;
ret = reset_control_deassert(chip->rst);
if (ret)
goto err_out_clock;
ret = devm_snd_soc_register_component(dev, &uniphier_aio_component,
chip->chip_spec->dais,
chip->chip_spec->num_dais);
if (ret) {
dev_err(dev, "Register component failed.\n");
goto err_out_reset;
}
ret = uniphier_aiodma_soc_register_platform(pdev);
if (ret) {
dev_err(dev, "Register platform failed.\n");
goto err_out_reset;
}
return 0;
err_out_reset:
reset_control_assert(chip->rst);
err_out_clock:
clk_disable_unprepare(chip->clk);
return ret;
}
EXPORT_SYMBOL_GPL(uniphier_aio_probe);
int uniphier_aio_remove(struct platform_device *pdev)
{
struct uniphier_aio_chip *chip = platform_get_drvdata(pdev);
reset_control_assert(chip->rst);
clk_disable_unprepare(chip->clk);
return 0;
}
EXPORT_SYMBOL_GPL(uniphier_aio_remove);
MODULE_AUTHOR("Katsuhiro Suzuki <suzuki.katsuhiro@socionext.com>");
MODULE_DESCRIPTION("UniPhier AIO CPU DAI driver.");
MODULE_LICENSE("GPL v2");