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linux/sound/soc/codecs/wcd938x-sdw.c
Srinivas Kandagatla 584a6301e1
ASoC: codecs: wcd938x: add simple clk stop support 
mark WCD938x as clock stop capable.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20220224111718.6264-16-srinivas.kandagatla@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
2022-02-25 13:51:13 +00:00

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// 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 <linux/pm_runtime.h>
#include <linux/irq.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);
struct irq_domain *slave_irq = wcd->slave_irq;
struct regmap *regmap = dev_get_regmap(&slave->dev, NULL);
u32 sts1, sts2, sts3;
do {
handle_nested_irq(irq_find_mapping(slave_irq, 0));
regmap_read(regmap, WCD938X_DIGITAL_INTR_STATUS_0, &sts1);
regmap_read(regmap, WCD938X_DIGITAL_INTR_STATUS_1, &sts2);
regmap_read(regmap, WCD938X_DIGITAL_INTR_STATUS_2, &sts3);
} while (sts1 || sts2 || sts3);
return IRQ_HANDLED;
}
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;
pdev->prop.simple_clk_stop_capable = true;
if (wcd->is_tx) {
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;
} 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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