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cs35l41_hda_property.c
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cs35l41_hda_property.c
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// SPDX-License-Identifier: GPL-2.0
//
// CS35L41 ALSA HDA Property driver
//
// Copyright 2023 Cirrus Logic, Inc.
//
// Author: Stefan Binding <sbinding@opensource.cirrus.com>
#include <linux/acpi.h>
#include <linux/gpio/consumer.h>
#include <linux/string.h>
#include "cs35l41_hda_property.h"
#include <linux/spi/spi.h>
#define MAX_AMPS 4
struct cs35l41_config {
const char *ssid;
enum {
SPI,
I2C
} bus;
int num_amps;
enum {
INTERNAL,
EXTERNAL
} boost_type;
u8 channel[MAX_AMPS];
int reset_gpio_index; /* -1 if no reset gpio */
int spkid_gpio_index; /* -1 if no spkid gpio */
int cs_gpio_index; /* -1 if no cs gpio, or cs-gpios already exists, max num amps == 2 */
int boost_ind_nanohenry; /* Required if boost_type == Internal */
int boost_peak_milliamp; /* Required if boost_type == Internal */
int boost_cap_microfarad; /* Required if boost_type == Internal */
};
static const struct cs35l41_config cs35l41_config_table[] = {
/*
* Device 103C89C6 does have _DSD, however it is setup to use the wrong boost type.
* We can override the _DSD to correct the boost type here.
* Since this laptop has valid ACPI, we do not need to handle cs-gpios, since that already exists
* in the ACPI. The Reset GPIO is also valid, so we can use the Reset defined in _DSD.
*/
{ "103C89C6", SPI, 2, INTERNAL, { CS35L41_RIGHT, CS35L41_LEFT, 0, 0 }, -1, -1, -1, 1000, 4500, 24 },
{ "104312AF", SPI, 2, INTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 1, 2, 0, 1000, 4500, 24 },
{ "10431433", I2C, 2, INTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 0, 1, -1, 1000, 4500, 24 },
{ "10431463", I2C, 2, INTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 0, 1, -1, 1000, 4500, 24 },
{ "10431473", SPI, 2, INTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 1, -1, 0, 1000, 4500, 24 },
{ "10431483", SPI, 2, INTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 1, -1, 0, 1000, 4500, 24 },
{ "10431493", SPI, 2, INTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 1, 2, 0, 1000, 4500, 24 },
{ "104314D3", SPI, 2, INTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 1, 2, 0, 1000, 4500, 24 },
{ "104314E3", I2C, 2, INTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 0, 1, -1, 1000, 4500, 24 },
{ "10431503", I2C, 2, INTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 0, 1, -1, 1000, 4500, 24 },
{ "10431533", I2C, 2, INTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 0, 1, -1, 1000, 4500, 24 },
{ "10431573", SPI, 2, INTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 1, 2, 0, 1000, 4500, 24 },
{ "10431663", SPI, 2, INTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 1, -1, 0, 1000, 4500, 24 },
{ "104316D3", SPI, 2, EXTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 1, 2, 0, 0, 0, 0 },
{ "104316F3", SPI, 2, EXTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 1, 2, 0, 0, 0, 0 },
{ "104317F3", I2C, 2, INTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 0, 1, -1, 1000, 4500, 24 },
{ "10431863", SPI, 2, INTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 1, 2, 0, 1000, 4500, 24 },
{ "104318D3", I2C, 2, EXTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 0, 1, -1, 0, 0, 0 },
{ "10431C9F", SPI, 2, INTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 1, 2, 0, 1000, 4500, 24 },
{ "10431CAF", SPI, 2, INTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 1, 2, 0, 1000, 4500, 24 },
{ "10431CCF", SPI, 2, INTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 1, 2, 0, 1000, 4500, 24 },
{ "10431CDF", SPI, 2, INTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 1, 2, 0, 1000, 4500, 24 },
{ "10431CEF", SPI, 2, INTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 1, 2, 0, 1000, 4500, 24 },
{ "10431D1F", I2C, 2, INTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 0, 1, -1, 1000, 4500, 24 },
{ "10431DA2", SPI, 2, EXTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 1, 2, 0, 0, 0, 0 },
{ "10431E02", SPI, 2, EXTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 1, 2, 0, 0, 0, 0 },
{ "10431EE2", I2C, 2, EXTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 0, -1, -1, 0, 0, 0 },
{ "10431F12", I2C, 2, INTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 0, 1, -1, 1000, 4500, 24 },
{ "10431F1F", SPI, 2, EXTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 1, -1, 0, 0, 0, 0 },
{ "10431F62", SPI, 2, EXTERNAL, { CS35L41_LEFT, CS35L41_RIGHT, 0, 0 }, 1, 2, 0, 0, 0, 0 },
{}
};
static int cs35l41_add_gpios(struct cs35l41_hda *cs35l41, struct device *physdev, int reset_gpio,
int spkid_gpio, int cs_gpio_index, int num_amps)
{
struct acpi_gpio_mapping *gpio_mapping = NULL;
struct acpi_gpio_params *reset_gpio_params = NULL;
struct acpi_gpio_params *spkid_gpio_params = NULL;
struct acpi_gpio_params *cs_gpio_params = NULL;
unsigned int num_entries = 0;
unsigned int reset_index, spkid_index, csgpio_index;
int i;
/*
* GPIO Mapping only needs to be done once, since it would be available for subsequent amps
*/
if (cs35l41->dacpi->driver_gpios)
return 0;
if (reset_gpio >= 0) {
reset_index = num_entries;
num_entries++;
}
if (spkid_gpio >= 0) {
spkid_index = num_entries;
num_entries++;
}
if ((cs_gpio_index >= 0) && (num_amps == 2)) {
csgpio_index = num_entries;
num_entries++;
}
if (!num_entries)
return 0;
/* must include termination entry */
num_entries++;
gpio_mapping = devm_kcalloc(physdev, num_entries, sizeof(struct acpi_gpio_mapping),
GFP_KERNEL);
if (!gpio_mapping)
goto err;
if (reset_gpio >= 0) {
gpio_mapping[reset_index].name = "reset-gpios";
reset_gpio_params = devm_kcalloc(physdev, num_amps, sizeof(struct acpi_gpio_params),
GFP_KERNEL);
if (!reset_gpio_params)
goto err;
for (i = 0; i < num_amps; i++)
reset_gpio_params[i].crs_entry_index = reset_gpio;
gpio_mapping[reset_index].data = reset_gpio_params;
gpio_mapping[reset_index].size = num_amps;
}
if (spkid_gpio >= 0) {
gpio_mapping[spkid_index].name = "spk-id-gpios";
spkid_gpio_params = devm_kcalloc(physdev, num_amps, sizeof(struct acpi_gpio_params),
GFP_KERNEL);
if (!spkid_gpio_params)
goto err;
for (i = 0; i < num_amps; i++)
spkid_gpio_params[i].crs_entry_index = spkid_gpio;
gpio_mapping[spkid_index].data = spkid_gpio_params;
gpio_mapping[spkid_index].size = num_amps;
}
if ((cs_gpio_index >= 0) && (num_amps == 2)) {
gpio_mapping[csgpio_index].name = "cs-gpios";
/* only one GPIO CS is supported without using _DSD, obtained using index 0 */
cs_gpio_params = devm_kzalloc(physdev, sizeof(struct acpi_gpio_params), GFP_KERNEL);
if (!cs_gpio_params)
goto err;
cs_gpio_params->crs_entry_index = cs_gpio_index;
gpio_mapping[csgpio_index].data = cs_gpio_params;
gpio_mapping[csgpio_index].size = 1;
}
return devm_acpi_dev_add_driver_gpios(physdev, gpio_mapping);
err:
devm_kfree(physdev, gpio_mapping);
devm_kfree(physdev, reset_gpio_params);
devm_kfree(physdev, spkid_gpio_params);
devm_kfree(physdev, cs_gpio_params);
return -ENOMEM;
}
static int generic_dsd_config(struct cs35l41_hda *cs35l41, struct device *physdev, int id,
const char *hid)
{
struct cs35l41_hw_cfg *hw_cfg = &cs35l41->hw_cfg;
const struct cs35l41_config *cfg;
struct gpio_desc *cs_gpiod;
struct spi_device *spi;
bool dsd_found;
int ret;
for (cfg = cs35l41_config_table; cfg->ssid; cfg++) {
if (!strcasecmp(cfg->ssid, cs35l41->acpi_subsystem_id))
break;
}
if (!cfg->ssid)
return -ENOENT;
if (!cs35l41->dacpi || cs35l41->dacpi != ACPI_COMPANION(physdev)) {
dev_err(cs35l41->dev, "ACPI Device does not match, cannot override _DSD.\n");
return -ENODEV;
}
dev_info(cs35l41->dev, "Adding DSD properties for %s\n", cs35l41->acpi_subsystem_id);
dsd_found = acpi_dev_has_props(cs35l41->dacpi);
if (!dsd_found) {
ret = cs35l41_add_gpios(cs35l41, physdev, cfg->reset_gpio_index,
cfg->spkid_gpio_index, cfg->cs_gpio_index,
cfg->num_amps);
if (ret) {
dev_err(cs35l41->dev, "Error adding GPIO mapping: %d\n", ret);
return ret;
}
} else if (cfg->reset_gpio_index >= 0 || cfg->spkid_gpio_index >= 0) {
dev_warn(cs35l41->dev, "Cannot add Reset/Speaker ID/SPI CS GPIO Mapping, "
"_DSD already exists.\n");
}
if (cfg->bus == SPI) {
cs35l41->index = id;
/*
* Manually set the Chip Select for the second amp <cs_gpio_index> in the node.
* This is only supported for systems with 2 amps, since we cannot expand the
* default number of chip selects without using cs-gpios
* The CS GPIO must be set high prior to communicating with the first amp (which
* uses a native chip select), to ensure the second amp does not clash with the
* first.
*/
if (IS_ENABLED(CONFIG_SPI) && cfg->cs_gpio_index >= 0) {
spi = to_spi_device(cs35l41->dev);
if (cfg->num_amps != 2) {
dev_warn(cs35l41->dev,
"Cannot update SPI CS, Number of Amps (%d) != 2\n",
cfg->num_amps);
} else if (dsd_found) {
dev_warn(cs35l41->dev,
"Cannot update SPI CS, _DSD already exists.\n");
} else {
/*
* This is obtained using driver_gpios, since only one GPIO for CS
* exists, this can be obtained using index 0.
*/
cs_gpiod = gpiod_get_index(physdev, "cs", 0, GPIOD_OUT_LOW);
if (IS_ERR(cs_gpiod)) {
dev_err(cs35l41->dev,
"Unable to get Chip Select GPIO descriptor\n");
return PTR_ERR(cs_gpiod);
}
if (id == 1) {
spi_set_csgpiod(spi, 0, cs_gpiod);
cs35l41->cs_gpio = cs_gpiod;
} else {
gpiod_set_value_cansleep(cs_gpiod, true);
gpiod_put(cs_gpiod);
}
spi_setup(spi);
}
}
} else {
if (cfg->num_amps > 2)
/*
* i2c addresses for 3/4 amps are used in order: 0x40, 0x41, 0x42, 0x43,
* subtracting 0x40 would give zero-based index
*/
cs35l41->index = id - 0x40;
else
/* i2c addr 0x40 for first amp (always), 0x41/0x42 for 2nd amp */
cs35l41->index = id == 0x40 ? 0 : 1;
}
if (cfg->num_amps == 3)
/* 3 amps means a center channel, so no duplicate channels */
cs35l41->channel_index = 0;
else
/*
* if 4 amps, there are duplicate channels, so they need different indexes
* if 2 amps, no duplicate channels, channel_index would be 0
*/
cs35l41->channel_index = cs35l41->index / 2;
cs35l41->reset_gpio = fwnode_gpiod_get_index(acpi_fwnode_handle(cs35l41->dacpi), "reset",
cs35l41->index, GPIOD_OUT_LOW,
"cs35l41-reset");
cs35l41->speaker_id = cs35l41_get_speaker_id(physdev, cs35l41->index, cfg->num_amps, -1);
hw_cfg->spk_pos = cfg->channel[cs35l41->index];
if (cfg->boost_type == INTERNAL) {
hw_cfg->bst_type = CS35L41_INT_BOOST;
hw_cfg->bst_ind = cfg->boost_ind_nanohenry;
hw_cfg->bst_ipk = cfg->boost_peak_milliamp;
hw_cfg->bst_cap = cfg->boost_cap_microfarad;
hw_cfg->gpio1.func = CS35L41_NOT_USED;
hw_cfg->gpio1.valid = true;
} else {
hw_cfg->bst_type = CS35L41_EXT_BOOST;
hw_cfg->bst_ind = -1;
hw_cfg->bst_ipk = -1;
hw_cfg->bst_cap = -1;
hw_cfg->gpio1.func = CS35l41_VSPK_SWITCH;
hw_cfg->gpio1.valid = true;
}
hw_cfg->gpio2.func = CS35L41_INTERRUPT;
hw_cfg->gpio2.valid = true;
hw_cfg->valid = true;
return 0;
}
/*
* Device CLSA010(0/1) doesn't have _DSD so a gpiod_get by the label reset won't work.
* And devices created by serial-multi-instantiate don't have their device struct
* pointing to the correct fwnode, so acpi_dev must be used here.
* And devm functions expect that the device requesting the resource has the correct
* fwnode.
*/
static int lenovo_legion_no_acpi(struct cs35l41_hda *cs35l41, struct device *physdev, int id,
const char *hid)
{
struct cs35l41_hw_cfg *hw_cfg = &cs35l41->hw_cfg;
/* check I2C address to assign the index */
cs35l41->index = id == 0x40 ? 0 : 1;
cs35l41->channel_index = 0;
cs35l41->reset_gpio = gpiod_get_index(physdev, NULL, 0, GPIOD_OUT_HIGH);
cs35l41->speaker_id = cs35l41_get_speaker_id(physdev, 0, 0, 2);
hw_cfg->spk_pos = cs35l41->index;
hw_cfg->gpio2.func = CS35L41_INTERRUPT;
hw_cfg->gpio2.valid = true;
hw_cfg->valid = true;
if (strcmp(hid, "CLSA0100") == 0) {
hw_cfg->bst_type = CS35L41_EXT_BOOST_NO_VSPK_SWITCH;
} else if (strcmp(hid, "CLSA0101") == 0) {
hw_cfg->bst_type = CS35L41_EXT_BOOST;
hw_cfg->gpio1.func = CS35l41_VSPK_SWITCH;
hw_cfg->gpio1.valid = true;
}
return 0;
}
struct cs35l41_prop_model {
const char *hid;
const char *ssid;
int (*add_prop)(struct cs35l41_hda *cs35l41, struct device *physdev, int id,
const char *hid);
};
static const struct cs35l41_prop_model cs35l41_prop_model_table[] = {
{ "CLSA0100", NULL, lenovo_legion_no_acpi },
{ "CLSA0101", NULL, lenovo_legion_no_acpi },
{ "CSC3551", "103C89C6", generic_dsd_config },
{ "CSC3551", "104312AF", generic_dsd_config },
{ "CSC3551", "10431433", generic_dsd_config },
{ "CSC3551", "10431463", generic_dsd_config },
{ "CSC3551", "10431473", generic_dsd_config },
{ "CSC3551", "10431483", generic_dsd_config },
{ "CSC3551", "10431493", generic_dsd_config },
{ "CSC3551", "104314D3", generic_dsd_config },
{ "CSC3551", "104314E3", generic_dsd_config },
{ "CSC3551", "10431503", generic_dsd_config },
{ "CSC3551", "10431533", generic_dsd_config },
{ "CSC3551", "10431573", generic_dsd_config },
{ "CSC3551", "10431663", generic_dsd_config },
{ "CSC3551", "104316D3", generic_dsd_config },
{ "CSC3551", "104316F3", generic_dsd_config },
{ "CSC3551", "104317F3", generic_dsd_config },
{ "CSC3551", "10431863", generic_dsd_config },
{ "CSC3551", "104318D3", generic_dsd_config },
{ "CSC3551", "10431C9F", generic_dsd_config },
{ "CSC3551", "10431CAF", generic_dsd_config },
{ "CSC3551", "10431CCF", generic_dsd_config },
{ "CSC3551", "10431CDF", generic_dsd_config },
{ "CSC3551", "10431CEF", generic_dsd_config },
{ "CSC3551", "10431D1F", generic_dsd_config },
{ "CSC3551", "10431DA2", generic_dsd_config },
{ "CSC3551", "10431E02", generic_dsd_config },
{ "CSC3551", "10431EE2", generic_dsd_config },
{ "CSC3551", "10431F12", generic_dsd_config },
{ "CSC3551", "10431F1F", generic_dsd_config },
{ "CSC3551", "10431F62", generic_dsd_config },
{}
};
int cs35l41_add_dsd_properties(struct cs35l41_hda *cs35l41, struct device *physdev, int id,
const char *hid)
{
const struct cs35l41_prop_model *model;
for (model = cs35l41_prop_model_table; model->hid; model++) {
if (!strcmp(model->hid, hid) &&
(!model->ssid ||
(cs35l41->acpi_subsystem_id &&
!strcasecmp(model->ssid, cs35l41->acpi_subsystem_id))))
return model->add_prop(cs35l41, physdev, id, hid);
}
return -ENOENT;
}