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// SPDX-License-Identifier: GPL-2.0-only
//
// Common code for Cirrus side-codecs.
//
// Copyright (C) 2021, 2023 Cirrus Logic, Inc. and
// Cirrus Logic International Semiconductor Ltd.
#include <linux/dev_printk.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include "cirrus_scodec.h"
int cirrus_scodec_get_speaker_id(struct device *dev, int amp_index,
int num_amps, int fixed_gpio_id)
{
struct gpio_desc *speaker_id_desc;
int speaker_id = -ENOENT;
if (fixed_gpio_id >= 0) {
dev_dbg(dev, "Found Fixed Speaker ID GPIO (index = %d)\n", fixed_gpio_id);
speaker_id_desc = gpiod_get_index(dev, NULL, fixed_gpio_id, GPIOD_IN);
if (IS_ERR(speaker_id_desc)) {
speaker_id = PTR_ERR(speaker_id_desc);
return speaker_id;
}
speaker_id = gpiod_get_value_cansleep(speaker_id_desc);
gpiod_put(speaker_id_desc);
} else {
int base_index;
int gpios_per_amp;
int count;
int tmp;
int i;
count = gpiod_count(dev, "spk-id");
if (count > 0) {
speaker_id = 0;
gpios_per_amp = count / num_amps;
base_index = gpios_per_amp * amp_index;
if (count % num_amps)
return -EINVAL;
dev_dbg(dev, "Found %d Speaker ID GPIOs per Amp\n", gpios_per_amp);
for (i = 0; i < gpios_per_amp; i++) {
speaker_id_desc = gpiod_get_index(dev, "spk-id", i + base_index,
GPIOD_IN);
if (IS_ERR(speaker_id_desc)) {
speaker_id = PTR_ERR(speaker_id_desc);
break;
}
tmp = gpiod_get_value_cansleep(speaker_id_desc);
gpiod_put(speaker_id_desc);
if (tmp < 0) {
speaker_id = tmp;
break;
}
speaker_id |= tmp << i;
}
}
}
dev_dbg(dev, "Speaker ID = %d\n", speaker_id);
return speaker_id;
}
EXPORT_SYMBOL_NS_GPL(cirrus_scodec_get_speaker_id, SND_HDA_CIRRUS_SCODEC);
MODULE_DESCRIPTION("HDA Cirrus side-codec library");
MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
MODULE_LICENSE("GPL");
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