diff options
Diffstat (limited to 'sound/soc/codecs/wcd-common.c')
| -rw-r--r-- | sound/soc/codecs/wcd-common.c | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/sound/soc/codecs/wcd-common.c b/sound/soc/codecs/wcd-common.c new file mode 100644 index 000000000000..9016e974582f --- /dev/null +++ b/sound/soc/codecs/wcd-common.c @@ -0,0 +1,144 @@ +// 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"); |