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