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// SPDX-License-Identifier: GPL-2.0-only
// Copyright (c) 2025, Qualcomm Technologies, Inc. and/or its subsidiaries.
#include <linux/export.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/of.h>
#include <linux/printk.h>
#include <linux/component.h>
#include <linux/pm_runtime.h>
#include <linux/soundwire/sdw.h>
#include <linux/soundwire/sdw_type.h>
#include <linux/regmap.h>
#include "wcd-common.h"
#define WCD_MIN_MICBIAS_MV 1000
#define WCD_DEF_MICBIAS_MV 1800
#define WCD_MAX_MICBIAS_MV 2850
#define SWRS_SCP_HOST_CLK_DIV2_CTL_BANK(m) (0xE0 + 0x10 * (m))
int wcd_get_micb_vout_ctl_val(struct device *dev, u32 micb_mv)
{
/* min micbias voltage is 1V and maximum is 2.85V */
if (micb_mv < WCD_MIN_MICBIAS_MV || micb_mv > WCD_MAX_MICBIAS_MV) {
dev_err(dev, "Unsupported micbias voltage (%u mV)\n", micb_mv);
return -EINVAL;
}
return (micb_mv - WCD_MIN_MICBIAS_MV) / 50;
}
EXPORT_SYMBOL_GPL(wcd_get_micb_vout_ctl_val);
static int wcd_get_micbias_val(struct device *dev, int micb_num, u32 *micb_mv)
{
char micbias[64];
int mv;
sprintf(micbias, "qcom,micbias%d-microvolt", micb_num);
if (of_property_read_u32(dev->of_node, micbias, &mv)) {
dev_err(dev, "%s value not found, using default\n", micbias);
mv = WCD_DEF_MICBIAS_MV;
} else {
/* convert it to milli volts */
mv = mv/1000;
}
if (micb_mv)
*micb_mv = mv;
mv = wcd_get_micb_vout_ctl_val(dev, mv);
if (mv < 0) {
dev_err(dev, "Unsupported %s voltage (%d mV), falling back to default (%d mV)\n",
micbias, mv, WCD_DEF_MICBIAS_MV);
return wcd_get_micb_vout_ctl_val(dev, WCD_DEF_MICBIAS_MV);
}
return mv;
}
int wcd_dt_parse_micbias_info(struct wcd_common *common)
{
int ret, i;
for (i = 0; i < common->max_bias; i++) {
ret = wcd_get_micbias_val(common->dev, i + 1, &common->micb_mv[i]);
if (ret < 0)
return ret;
common->micb_vout[i] = ret;
}
return 0;
}
EXPORT_SYMBOL_GPL(wcd_dt_parse_micbias_info);
static int wcd_sdw_component_bind(struct device *dev, struct device *master, void *data)
{
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 0;
}
static void wcd_sdw_component_unbind(struct device *dev, struct device *master, void *data)
{
pm_runtime_disable(dev);
pm_runtime_set_suspended(dev);
pm_runtime_dont_use_autosuspend(dev);
}
const struct component_ops wcd_sdw_component_ops = {
.bind = wcd_sdw_component_bind,
.unbind = wcd_sdw_component_unbind,
};
EXPORT_SYMBOL_GPL(wcd_sdw_component_ops);
int wcd_update_status(struct sdw_slave *slave, enum sdw_slave_status status)
{
struct regmap *regmap = dev_get_regmap(&slave->dev, NULL);
if (regmap && status == SDW_SLAVE_ATTACHED) {
/* Write out any cached changes that happened between probe and attach */
regcache_cache_only(regmap, false);
return regcache_sync(regmap);
}
return 0;
}
EXPORT_SYMBOL_GPL(wcd_update_status);
int wcd_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;
}
EXPORT_SYMBOL_GPL(wcd_bus_config);
int wcd_interrupt_callback(struct sdw_slave *slave, struct irq_domain *slave_irq,
unsigned int wcd_intr_status0, unsigned int wcd_intr_status1,
unsigned int wcd_intr_status2)
{
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, wcd_intr_status0, &sts1);
regmap_read(regmap, wcd_intr_status1, &sts2);
regmap_read(regmap, wcd_intr_status2, &sts3);
} while (sts1 || sts2 || sts3);
return IRQ_HANDLED;
}
EXPORT_SYMBOL_GPL(wcd_interrupt_callback);
MODULE_DESCRIPTION("Common Qualcomm WCD Codec helpers driver");
MODULE_LICENSE("GPL");
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