301 lines
8.3 KiB
C
301 lines
8.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* arizona-spi.c -- Arizona SPI bus interface
|
|
*
|
|
* Copyright 2012 Wolfson Microelectronics plc
|
|
*
|
|
* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
|
|
*/
|
|
|
|
#include <linux/acpi.h>
|
|
#include <linux/err.h>
|
|
#include <linux/gpio/consumer.h>
|
|
#include <linux/gpio/machine.h>
|
|
#include <linux/module.h>
|
|
#include <linux/pm_runtime.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/regulator/consumer.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/spi/spi.h>
|
|
#include <linux/of.h>
|
|
#include <uapi/linux/input-event-codes.h>
|
|
|
|
#include <linux/mfd/arizona/core.h>
|
|
|
|
#include "arizona.h"
|
|
|
|
#ifdef CONFIG_ACPI
|
|
static const struct acpi_gpio_params reset_gpios = { 1, 0, false };
|
|
static const struct acpi_gpio_params ldoena_gpios = { 2, 0, false };
|
|
|
|
static const struct acpi_gpio_mapping arizona_acpi_gpios[] = {
|
|
{ "reset-gpios", &reset_gpios, 1, },
|
|
{ "wlf,ldoena-gpios", &ldoena_gpios, 1 },
|
|
{ }
|
|
};
|
|
|
|
/*
|
|
* The ACPI resources for the device only describe external GPIO-s. They do
|
|
* not provide mappings for the GPIO-s coming from the Arizona codec itself.
|
|
*/
|
|
static const struct gpiod_lookup arizona_soc_gpios[] = {
|
|
{ "arizona", 2, "wlf,spkvdd-ena", 0, GPIO_ACTIVE_HIGH },
|
|
{ "arizona", 4, "wlf,micd-pol", 0, GPIO_ACTIVE_LOW },
|
|
};
|
|
|
|
static void arizona_spi_acpi_remove_lookup(void *lookup)
|
|
{
|
|
gpiod_remove_lookup_table(lookup);
|
|
}
|
|
|
|
/* For ACPI tables from boards which ship with Windows as factory OS */
|
|
static int arizona_spi_acpi_windows_probe(struct arizona *arizona)
|
|
{
|
|
struct gpiod_lookup_table *lookup;
|
|
acpi_status status;
|
|
int ret;
|
|
|
|
/* Add mappings for the 2 ACPI declared GPIOs used for reset and ldo-ena */
|
|
devm_acpi_dev_add_driver_gpios(arizona->dev, arizona_acpi_gpios);
|
|
|
|
/* Add lookups for the SoCs own GPIOs used for micdet-polarity and spkVDD-enable */
|
|
lookup = devm_kzalloc(arizona->dev,
|
|
struct_size(lookup, table, ARRAY_SIZE(arizona_soc_gpios) + 1),
|
|
GFP_KERNEL);
|
|
if (!lookup)
|
|
return -ENOMEM;
|
|
|
|
lookup->dev_id = dev_name(arizona->dev);
|
|
memcpy(lookup->table, arizona_soc_gpios, sizeof(arizona_soc_gpios));
|
|
|
|
gpiod_add_lookup_table(lookup);
|
|
ret = devm_add_action_or_reset(arizona->dev, arizona_spi_acpi_remove_lookup, lookup);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Enable 32KHz clock from SoC to codec for jack-detect */
|
|
status = acpi_evaluate_object(ACPI_HANDLE(arizona->dev), "CLKE", NULL, NULL);
|
|
if (ACPI_FAILURE(status))
|
|
dev_warn(arizona->dev, "Failed to enable 32KHz clk ACPI error %d\n", status);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* For ACPI tables from boards which ship with Android as factory OS */
|
|
static int arizona_spi_acpi_android_probe(struct arizona *arizona)
|
|
{
|
|
int ret;
|
|
|
|
/*
|
|
* Get the reset GPIO, treating -ENOENT as -EPROBE_DEFER to wait for
|
|
* the x86-android-tablets module to register the board specific GPIO
|
|
* lookup table.
|
|
*/
|
|
arizona->pdata.reset = devm_gpiod_get(arizona->dev, "reset", GPIOD_OUT_LOW);
|
|
if (IS_ERR(arizona->pdata.reset)) {
|
|
ret = PTR_ERR(arizona->pdata.reset);
|
|
if (ret == -ENOENT) {
|
|
dev_info_once(arizona->dev,
|
|
"Deferring probe till GPIO lookup is registered\n");
|
|
ret = -EPROBE_DEFER;
|
|
}
|
|
return dev_err_probe(arizona->dev, ret, "getting reset GPIO\n");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* The AOSP 3.5 mm Headset: Accessory Specification gives the following values:
|
|
* Function A Play/Pause: 0 ohm
|
|
* Function D Voice assistant: 135 ohm
|
|
* Function B Volume Up 240 ohm
|
|
* Function C Volume Down 470 ohm
|
|
* Minimum Mic DC resistance 1000 ohm
|
|
* Minimum Ear speaker impedance 16 ohm
|
|
* Note the first max value below must be less then the min. speaker impedance,
|
|
* to allow CTIA/OMTP detection to work. The other max values are the closest
|
|
* value from extcon-arizona.c:arizona_micd_levels halfway 2 button resistances.
|
|
*/
|
|
static const struct arizona_micd_range arizona_micd_aosp_ranges[] = {
|
|
{ .max = 11, .key = KEY_PLAYPAUSE },
|
|
{ .max = 186, .key = KEY_VOICECOMMAND },
|
|
{ .max = 348, .key = KEY_VOLUMEUP },
|
|
{ .max = 752, .key = KEY_VOLUMEDOWN },
|
|
};
|
|
|
|
static int arizona_spi_acpi_probe(struct arizona *arizona)
|
|
{
|
|
struct acpi_device *adev = ACPI_COMPANION(arizona->dev);
|
|
int ret;
|
|
|
|
if (acpi_dev_hid_uid_match(adev, "10WM5102", NULL))
|
|
ret = arizona_spi_acpi_android_probe(arizona);
|
|
else
|
|
ret = arizona_spi_acpi_windows_probe(arizona);
|
|
|
|
if (ret)
|
|
return ret;
|
|
|
|
/*
|
|
* Some DSDTs wrongly declare the IRQ trigger-type as IRQF_TRIGGER_FALLING
|
|
* The IRQ line will stay low when a new IRQ event happens between reading
|
|
* the IRQ status flags and acknowledging them. When the IRQ line stays
|
|
* low like this the IRQ will never trigger again when its type is set
|
|
* to IRQF_TRIGGER_FALLING. Correct the IRQ trigger-type to fix this.
|
|
*
|
|
* Note theoretically it is possible that some boards are not capable
|
|
* of handling active low level interrupts. In that case setting the
|
|
* flag to IRQF_TRIGGER_FALLING would not be a bug (and we would need
|
|
* to work around this) but so far all known usages of IRQF_TRIGGER_FALLING
|
|
* are a bug in the board's DSDT.
|
|
*/
|
|
arizona->pdata.irq_flags = IRQF_TRIGGER_LOW;
|
|
|
|
/* Wait 200 ms after jack insertion */
|
|
arizona->pdata.micd_detect_debounce = 200;
|
|
|
|
/* Use standard AOSP values for headset-button mappings */
|
|
arizona->pdata.micd_ranges = arizona_micd_aosp_ranges;
|
|
arizona->pdata.num_micd_ranges = ARRAY_SIZE(arizona_micd_aosp_ranges);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct acpi_device_id arizona_acpi_match[] = {
|
|
{
|
|
.id = "WM510204",
|
|
.driver_data = WM5102,
|
|
},
|
|
{
|
|
.id = "WM510205",
|
|
.driver_data = WM5102,
|
|
},
|
|
{
|
|
.id = "10WM5102",
|
|
.driver_data = WM5102,
|
|
},
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(acpi, arizona_acpi_match);
|
|
#else
|
|
static int arizona_spi_acpi_probe(struct arizona *arizona)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
#endif
|
|
|
|
static int arizona_spi_probe(struct spi_device *spi)
|
|
{
|
|
const struct spi_device_id *id = spi_get_device_id(spi);
|
|
const void *match_data;
|
|
struct arizona *arizona;
|
|
const struct regmap_config *regmap_config = NULL;
|
|
unsigned long type = 0;
|
|
int ret;
|
|
|
|
match_data = device_get_match_data(&spi->dev);
|
|
if (match_data)
|
|
type = (unsigned long)match_data;
|
|
else if (id)
|
|
type = id->driver_data;
|
|
|
|
switch (type) {
|
|
case WM5102:
|
|
if (IS_ENABLED(CONFIG_MFD_WM5102))
|
|
regmap_config = &wm5102_spi_regmap;
|
|
break;
|
|
case WM5110:
|
|
case WM8280:
|
|
if (IS_ENABLED(CONFIG_MFD_WM5110))
|
|
regmap_config = &wm5110_spi_regmap;
|
|
break;
|
|
case WM1831:
|
|
case CS47L24:
|
|
if (IS_ENABLED(CONFIG_MFD_CS47L24))
|
|
regmap_config = &cs47l24_spi_regmap;
|
|
break;
|
|
default:
|
|
dev_err(&spi->dev, "Unknown device type %ld\n", type);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!regmap_config) {
|
|
dev_err(&spi->dev,
|
|
"No kernel support for device type %ld\n", type);
|
|
return -EINVAL;
|
|
}
|
|
|
|
arizona = devm_kzalloc(&spi->dev, sizeof(*arizona), GFP_KERNEL);
|
|
if (arizona == NULL)
|
|
return -ENOMEM;
|
|
|
|
arizona->regmap = devm_regmap_init_spi(spi, regmap_config);
|
|
if (IS_ERR(arizona->regmap)) {
|
|
ret = PTR_ERR(arizona->regmap);
|
|
dev_err(&spi->dev, "Failed to allocate register map: %d\n",
|
|
ret);
|
|
return ret;
|
|
}
|
|
|
|
arizona->type = type;
|
|
arizona->dev = &spi->dev;
|
|
arizona->irq = spi->irq;
|
|
|
|
if (has_acpi_companion(&spi->dev)) {
|
|
ret = arizona_spi_acpi_probe(arizona);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return arizona_dev_init(arizona);
|
|
}
|
|
|
|
static void arizona_spi_remove(struct spi_device *spi)
|
|
{
|
|
struct arizona *arizona = spi_get_drvdata(spi);
|
|
|
|
arizona_dev_exit(arizona);
|
|
}
|
|
|
|
static const struct spi_device_id arizona_spi_ids[] = {
|
|
{ "wm5102", WM5102 },
|
|
{ "wm5110", WM5110 },
|
|
{ "wm8280", WM8280 },
|
|
{ "wm1831", WM1831 },
|
|
{ "cs47l24", CS47L24 },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(spi, arizona_spi_ids);
|
|
|
|
#ifdef CONFIG_OF
|
|
static const struct of_device_id arizona_spi_of_match[] = {
|
|
{ .compatible = "wlf,wm5102", .data = (void *)WM5102 },
|
|
{ .compatible = "wlf,wm5110", .data = (void *)WM5110 },
|
|
{ .compatible = "wlf,wm8280", .data = (void *)WM8280 },
|
|
{ .compatible = "wlf,wm1831", .data = (void *)WM1831 },
|
|
{ .compatible = "cirrus,cs47l24", .data = (void *)CS47L24 },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, arizona_spi_of_match);
|
|
#endif
|
|
|
|
static struct spi_driver arizona_spi_driver = {
|
|
.driver = {
|
|
.name = "arizona",
|
|
.pm = pm_ptr(&arizona_pm_ops),
|
|
.of_match_table = of_match_ptr(arizona_spi_of_match),
|
|
.acpi_match_table = ACPI_PTR(arizona_acpi_match),
|
|
},
|
|
.probe = arizona_spi_probe,
|
|
.remove = arizona_spi_remove,
|
|
.id_table = arizona_spi_ids,
|
|
};
|
|
|
|
module_spi_driver(arizona_spi_driver);
|
|
|
|
MODULE_SOFTDEP("pre: arizona_ldo1");
|
|
MODULE_DESCRIPTION("Arizona SPI bus interface");
|
|
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
|
|
MODULE_LICENSE("GPL");
|