ASoC: codecs: wcd938x-sdw: add SoundWire driver

This patch adds support to SoundWire devices on WCD9380/WCD9385 Codec

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20210609090943.7896-6-srinivas.kandagatla@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Srinivas Kandagatla 2021-06-09 10:09:39 +01:00 committed by Mark Brown
parent e02c65f3a7
commit 16572522ae
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3 changed files with 446 additions and 0 deletions

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@ -0,0 +1,315 @@
// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2021, Linaro Limited
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/component.h>
#include <sound/soc.h>
#include <linux/pm_runtime.h>
#include <linux/irqdomain.h>
#include <linux/of.h>
#include <linux/soundwire/sdw.h>
#include <linux/soundwire/sdw_type.h>
#include <linux/soundwire/sdw_registers.h>
#include <linux/regmap.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include "wcd938x.h"
#define SWRS_SCP_HOST_CLK_DIV2_CTL_BANK(m) (0xE0 + 0x10 * (m))
static struct wcd938x_sdw_ch_info wcd938x_sdw_rx_ch_info[] = {
WCD_SDW_CH(WCD938X_HPH_L, WCD938X_HPH_PORT, BIT(0)),
WCD_SDW_CH(WCD938X_HPH_R, WCD938X_HPH_PORT, BIT(1)),
WCD_SDW_CH(WCD938X_CLSH, WCD938X_CLSH_PORT, BIT(0)),
WCD_SDW_CH(WCD938X_COMP_L, WCD938X_COMP_PORT, BIT(0)),
WCD_SDW_CH(WCD938X_COMP_R, WCD938X_COMP_PORT, BIT(1)),
WCD_SDW_CH(WCD938X_LO, WCD938X_LO_PORT, BIT(0)),
WCD_SDW_CH(WCD938X_DSD_L, WCD938X_DSD_PORT, BIT(0)),
WCD_SDW_CH(WCD938X_DSD_R, WCD938X_DSD_PORT, BIT(1)),
};
static struct wcd938x_sdw_ch_info wcd938x_sdw_tx_ch_info[] = {
WCD_SDW_CH(WCD938X_ADC1, WCD938X_ADC_1_2_PORT, BIT(0)),
WCD_SDW_CH(WCD938X_ADC2, WCD938X_ADC_1_2_PORT, BIT(1)),
WCD_SDW_CH(WCD938X_ADC3, WCD938X_ADC_3_4_PORT, BIT(0)),
WCD_SDW_CH(WCD938X_ADC4, WCD938X_ADC_3_4_PORT, BIT(1)),
WCD_SDW_CH(WCD938X_DMIC0, WCD938X_DMIC_0_3_MBHC_PORT, BIT(0)),
WCD_SDW_CH(WCD938X_DMIC1, WCD938X_DMIC_0_3_MBHC_PORT, BIT(1)),
WCD_SDW_CH(WCD938X_MBHC, WCD938X_DMIC_0_3_MBHC_PORT, BIT(2)),
WCD_SDW_CH(WCD938X_DMIC2, WCD938X_DMIC_0_3_MBHC_PORT, BIT(2)),
WCD_SDW_CH(WCD938X_DMIC3, WCD938X_DMIC_0_3_MBHC_PORT, BIT(3)),
WCD_SDW_CH(WCD938X_DMIC4, WCD938X_DMIC_4_7_PORT, BIT(0)),
WCD_SDW_CH(WCD938X_DMIC5, WCD938X_DMIC_4_7_PORT, BIT(1)),
WCD_SDW_CH(WCD938X_DMIC6, WCD938X_DMIC_4_7_PORT, BIT(2)),
WCD_SDW_CH(WCD938X_DMIC7, WCD938X_DMIC_4_7_PORT, BIT(3)),
};
static struct sdw_dpn_prop wcd938x_dpn_prop[WCD938X_MAX_SWR_PORTS] = {
{
.num = 1,
.type = SDW_DPN_SIMPLE,
.min_ch = 1,
.max_ch = 8,
.simple_ch_prep_sm = true,
}, {
.num = 2,
.type = SDW_DPN_SIMPLE,
.min_ch = 1,
.max_ch = 4,
.simple_ch_prep_sm = true,
}, {
.num = 3,
.type = SDW_DPN_SIMPLE,
.min_ch = 1,
.max_ch = 4,
.simple_ch_prep_sm = true,
}, {
.num = 4,
.type = SDW_DPN_SIMPLE,
.min_ch = 1,
.max_ch = 4,
.simple_ch_prep_sm = true,
}, {
.num = 5,
.type = SDW_DPN_SIMPLE,
.min_ch = 1,
.max_ch = 4,
.simple_ch_prep_sm = true,
}
};
struct device *wcd938x_sdw_device_get(struct device_node *np)
{
return bus_find_device_by_of_node(&sdw_bus_type, np);
}
EXPORT_SYMBOL_GPL(wcd938x_sdw_device_get);
int wcd938x_swr_get_current_bank(struct sdw_slave *sdev)
{
int bank;
bank = sdw_read(sdev, SDW_SCP_CTRL);
return ((bank & 0x40) ? 1 : 0);
}
EXPORT_SYMBOL_GPL(wcd938x_swr_get_current_bank);
int wcd938x_sdw_hw_params(struct wcd938x_sdw_priv *wcd,
struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct sdw_port_config port_config[WCD938X_MAX_SWR_PORTS];
unsigned long ch_mask;
int i, j;
wcd->sconfig.ch_count = 1;
wcd->active_ports = 0;
for (i = 0; i < WCD938X_MAX_SWR_PORTS; i++) {
ch_mask = wcd->port_config[i].ch_mask;
if (!ch_mask)
continue;
for_each_set_bit(j, &ch_mask, 4)
wcd->sconfig.ch_count++;
port_config[wcd->active_ports] = wcd->port_config[i];
wcd->active_ports++;
}
wcd->sconfig.bps = 1;
wcd->sconfig.frame_rate = params_rate(params);
if (wcd->is_tx)
wcd->sconfig.direction = SDW_DATA_DIR_TX;
else
wcd->sconfig.direction = SDW_DATA_DIR_RX;
wcd->sconfig.type = SDW_STREAM_PCM;
return sdw_stream_add_slave(wcd->sdev, &wcd->sconfig,
&port_config[0], wcd->active_ports,
wcd->sruntime);
}
EXPORT_SYMBOL_GPL(wcd938x_sdw_hw_params);
int wcd938x_sdw_free(struct wcd938x_sdw_priv *wcd,
struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
sdw_stream_remove_slave(wcd->sdev, wcd->sruntime);
return 0;
}
EXPORT_SYMBOL_GPL(wcd938x_sdw_free);
int wcd938x_sdw_set_sdw_stream(struct wcd938x_sdw_priv *wcd,
struct snd_soc_dai *dai,
void *stream, int direction)
{
wcd->sruntime = stream;
return 0;
}
EXPORT_SYMBOL_GPL(wcd938x_sdw_set_sdw_stream);
static int wcd9380_update_status(struct sdw_slave *slave,
enum sdw_slave_status status)
{
return 0;
}
static int wcd9380_bus_config(struct sdw_slave *slave,
struct sdw_bus_params *params)
{
sdw_write(slave, SWRS_SCP_HOST_CLK_DIV2_CTL_BANK(params->next_bank), 0x01);
return 0;
}
static int wcd9380_interrupt_callback(struct sdw_slave *slave,
struct sdw_slave_intr_status *status)
{
struct wcd938x_sdw_priv *wcd = dev_get_drvdata(&slave->dev);
return wcd938x_handle_sdw_irq(wcd);
}
static struct sdw_slave_ops wcd9380_slave_ops = {
.update_status = wcd9380_update_status,
.interrupt_callback = wcd9380_interrupt_callback,
.bus_config = wcd9380_bus_config,
};
static int wcd938x_sdw_component_bind(struct device *dev,
struct device *master, void *data)
{
return 0;
}
static void wcd938x_sdw_component_unbind(struct device *dev,
struct device *master, void *data)
{
}
static const struct component_ops wcd938x_sdw_component_ops = {
.bind = wcd938x_sdw_component_bind,
.unbind = wcd938x_sdw_component_unbind,
};
static int wcd9380_probe(struct sdw_slave *pdev,
const struct sdw_device_id *id)
{
struct device *dev = &pdev->dev;
struct wcd938x_sdw_priv *wcd;
int ret;
wcd = devm_kzalloc(dev, sizeof(*wcd), GFP_KERNEL);
if (!wcd)
return -ENOMEM;
/**
* Port map index starts with 0, however the data port for this codec
* are from index 1
*/
if (of_property_read_bool(dev->of_node, "qcom,tx-port-mapping")) {
wcd->is_tx = true;
ret = of_property_read_u32_array(dev->of_node, "qcom,tx-port-mapping",
&pdev->m_port_map[1],
WCD938X_MAX_TX_SWR_PORTS);
} else {
ret = of_property_read_u32_array(dev->of_node, "qcom,rx-port-mapping",
&pdev->m_port_map[1],
WCD938X_MAX_SWR_PORTS);
}
if (ret < 0)
dev_info(dev, "Static Port mapping not specified\n");
wcd->sdev = pdev;
dev_set_drvdata(dev, wcd);
pdev->prop.scp_int1_mask = SDW_SCP_INT1_IMPL_DEF |
SDW_SCP_INT1_BUS_CLASH |
SDW_SCP_INT1_PARITY;
pdev->prop.lane_control_support = true;
if (wcd->is_tx) {
struct regmap *rm;
pdev->prop.source_ports = GENMASK(WCD938X_MAX_SWR_PORTS, 0);
pdev->prop.src_dpn_prop = wcd938x_dpn_prop;
wcd->ch_info = &wcd938x_sdw_tx_ch_info[0];
pdev->prop.wake_capable = true;
rm = devm_regmap_init_sdw(pdev, &wcd938x_regmap_config);
if (IS_ERR(rm))
return PTR_ERR(rm);
} else {
pdev->prop.sink_ports = GENMASK(WCD938X_MAX_SWR_PORTS, 0);
pdev->prop.sink_dpn_prop = wcd938x_dpn_prop;
wcd->ch_info = &wcd938x_sdw_rx_ch_info[0];
}
pm_runtime_set_autosuspend_delay(dev, 3000);
pm_runtime_use_autosuspend(dev);
pm_runtime_mark_last_busy(dev);
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
return component_add(dev, &wcd938x_sdw_component_ops);
}
static const struct sdw_device_id wcd9380_slave_id[] = {
SDW_SLAVE_ENTRY(0x0217, 0x10d, 0),
{},
};
MODULE_DEVICE_TABLE(sdw, wcd9380_slave_id);
static int __maybe_unused wcd938x_sdw_runtime_suspend(struct device *dev)
{
struct regmap *regmap = dev_get_regmap(dev, NULL);
if (regmap) {
regcache_cache_only(regmap, true);
regcache_mark_dirty(regmap);
}
return 0;
}
static int __maybe_unused wcd938x_sdw_runtime_resume(struct device *dev)
{
struct regmap *regmap = dev_get_regmap(dev, NULL);
if (regmap) {
regcache_cache_only(regmap, false);
regcache_sync(regmap);
}
pm_runtime_mark_last_busy(dev);
return 0;
}
static const struct dev_pm_ops wcd938x_sdw_pm_ops = {
SET_RUNTIME_PM_OPS(wcd938x_sdw_runtime_suspend, wcd938x_sdw_runtime_resume, NULL)
};
static struct sdw_driver wcd9380_codec_driver = {
.probe = wcd9380_probe,
.ops = &wcd9380_slave_ops,
.id_table = wcd9380_slave_id,
.driver = {
.name = "wcd9380-codec",
.pm = &wcd938x_sdw_pm_ops,
}
};
module_sdw_driver(wcd9380_codec_driver);
MODULE_DESCRIPTION("WCD938X SDW codec driver");
MODULE_LICENSE("GPL");

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@ -1514,7 +1514,39 @@ int wcd938x_handle_sdw_irq(struct wcd938x_sdw_priv *wcd)
}
EXPORT_SYMBOL_GPL(wcd938x_handle_sdw_irq);
static int wcd938x_codec_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct wcd938x_priv *wcd938x = dev_get_drvdata(dai->dev);
struct wcd938x_sdw_priv *wcd = wcd938x->sdw_priv[dai->id];
return wcd938x_sdw_hw_params(wcd, substream, params, dai);
}
static int wcd938x_codec_free(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct wcd938x_priv *wcd938x = dev_get_drvdata(dai->dev);
struct wcd938x_sdw_priv *wcd = wcd938x->sdw_priv[dai->id];
return wcd938x_sdw_free(wcd, substream, dai);
}
static int wcd938x_codec_set_sdw_stream(struct snd_soc_dai *dai,
void *stream, int direction)
{
struct wcd938x_priv *wcd938x = dev_get_drvdata(dai->dev);
struct wcd938x_sdw_priv *wcd = wcd938x->sdw_priv[dai->id];
return wcd938x_sdw_set_sdw_stream(wcd, dai, stream, direction);
}
static struct snd_soc_dai_ops wcd938x_sdw_dai_ops = {
.hw_params = wcd938x_codec_hw_params,
.hw_free = wcd938x_codec_free,
.set_sdw_stream = wcd938x_codec_set_sdw_stream,
};
static struct snd_soc_dai_driver wcd938x_dais[] = {
@ -1558,6 +1590,53 @@ static int wcd938x_bind(struct device *dev)
return ret;
}
wcd938x->rxdev = wcd938x_sdw_device_get(wcd938x->rxnode);
if (!wcd938x->rxdev) {
dev_err(dev, "could not find slave with matching of node\n");
return -EINVAL;
}
wcd938x->sdw_priv[AIF1_PB] = dev_get_drvdata(wcd938x->rxdev);
wcd938x->sdw_priv[AIF1_PB]->wcd938x = wcd938x;
wcd938x->txdev = wcd938x_sdw_device_get(wcd938x->txnode);
if (!wcd938x->txdev) {
dev_err(dev, "could not find txslave with matching of node\n");
return -EINVAL;
}
wcd938x->sdw_priv[AIF1_CAP] = dev_get_drvdata(wcd938x->txdev);
wcd938x->sdw_priv[AIF1_CAP]->wcd938x = wcd938x;
wcd938x->tx_sdw_dev = dev_to_sdw_dev(wcd938x->txdev);
if (!wcd938x->tx_sdw_dev) {
dev_err(dev, "could not get txslave with matching of dev\n");
return -EINVAL;
}
/* As TX is main CSR reg interface, which should not be suspended first.
* expicilty add the dependency link */
if (!device_link_add(wcd938x->rxdev, wcd938x->txdev, DL_FLAG_STATELESS |
DL_FLAG_PM_RUNTIME)) {
dev_err(dev, "could not devlink tx and rx\n");
return -EINVAL;
}
if (!device_link_add(dev, wcd938x->txdev, DL_FLAG_STATELESS |
DL_FLAG_PM_RUNTIME)) {
dev_err(dev, "could not devlink wcd and tx\n");
return -EINVAL;
}
if (!device_link_add(dev, wcd938x->rxdev, DL_FLAG_STATELESS |
DL_FLAG_PM_RUNTIME)) {
dev_err(dev, "could not devlink wcd and rx\n");
return -EINVAL;
}
wcd938x->regmap = dev_get_regmap(wcd938x->txdev, NULL);
if (!wcd938x->regmap) {
dev_err(dev, "%s: tx csr regmap not found\n", __func__);
return PTR_ERR(wcd938x->regmap);
}
ret = wcd938x_set_micbias_data(wcd938x);
if (ret < 0) {
dev_err(dev, "%s: bad micbias pdata\n", __func__);
@ -1578,6 +1657,9 @@ static void wcd938x_unbind(struct device *dev)
{
struct wcd938x_priv *wcd938x = dev_get_drvdata(dev);
device_link_remove(dev, wcd938x->txdev);
device_link_remove(dev, wcd938x->rxdev);
device_link_remove(wcd938x->rxdev, wcd938x->txdev);
snd_soc_unregister_component(dev);
component_unbind_all(dev, wcd938x);
}

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@ -668,4 +668,53 @@ struct wcd938x_sdw_priv {
extern struct regmap_config wcd938x_regmap_config;
int wcd938x_handle_sdw_irq(struct wcd938x_sdw_priv *priv);
#if IS_ENABLED(CONFIG_SND_SOC_WCD938X_SDW)
int wcd938x_sdw_free(struct wcd938x_sdw_priv *wcd,
struct snd_pcm_substream *substream,
struct snd_soc_dai *dai);
int wcd938x_sdw_set_sdw_stream(struct wcd938x_sdw_priv *wcd,
struct snd_soc_dai *dai,
void *stream, int direction);
int wcd938x_sdw_hw_params(struct wcd938x_sdw_priv *wcd,
struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai);
struct device *wcd938x_sdw_device_get(struct device_node *np);
int wcd938x_swr_get_current_bank(struct sdw_slave *sdev);
#else
static inline int wcd938x_sdw_free(struct wcd938x_sdw_priv *wcd,
struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
return -EOPNOTSUPP;
}
static inline int wcd938x_sdw_set_sdw_stream(struct wcd938x_sdw_priv *wcd,
struct snd_soc_dai *dai,
void *stream, int direction)
{
return -EOPNOTSUPP;
}
static inline int wcd938x_sdw_hw_params(struct wcd938x_sdw_priv *wcd,
struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
return -EOPNOTSUPP;
}
static inline struct device *wcd938x_sdw_device_get(struct device_node *np)
{
return NULL;
}
static inline int wcd938x_swr_get_current_bank(struct sdw_slave *sdev)
{
return 0;
}
#endif /* CONFIG_SND_SOC_WCD938X_SDW */
#endif /* __WCD938X_H__ */