698 строки
16 KiB
C
698 строки
16 KiB
C
/*
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* wm8994-core.c -- Device access for Wolfson WM8994
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*
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* Copyright 2009 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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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include <linux/err.h>
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#include <linux/delay.h>
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#include <linux/mfd/core.h>
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#include <linux/of.h>
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#include <linux/of_device.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/regulator/machine.h>
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#include <linux/mfd/wm8994/core.h>
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#include <linux/mfd/wm8994/pdata.h>
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#include <linux/mfd/wm8994/registers.h>
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#include "wm8994.h"
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static const struct mfd_cell wm8994_regulator_devs[] = {
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{
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.name = "wm8994-ldo",
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.id = 0,
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.pm_runtime_no_callbacks = true,
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},
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{
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.name = "wm8994-ldo",
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.id = 1,
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.pm_runtime_no_callbacks = true,
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},
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};
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static struct resource wm8994_codec_resources[] = {
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{
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.start = WM8994_IRQ_TEMP_SHUT,
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.end = WM8994_IRQ_TEMP_WARN,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct resource wm8994_gpio_resources[] = {
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{
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.start = WM8994_IRQ_GPIO(1),
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.end = WM8994_IRQ_GPIO(11),
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.flags = IORESOURCE_IRQ,
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},
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};
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static const struct mfd_cell wm8994_devs[] = {
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{
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.name = "wm8994-codec",
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.num_resources = ARRAY_SIZE(wm8994_codec_resources),
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.resources = wm8994_codec_resources,
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},
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{
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.name = "wm8994-gpio",
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.num_resources = ARRAY_SIZE(wm8994_gpio_resources),
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.resources = wm8994_gpio_resources,
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.pm_runtime_no_callbacks = true,
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},
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};
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/*
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* Supplies for the main bulk of CODEC; the LDO supplies are ignored
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* and should be handled via the standard regulator API supply
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* management.
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*/
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static const char *wm1811_main_supplies[] = {
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"DBVDD1",
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"DBVDD2",
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"DBVDD3",
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"DCVDD",
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"AVDD1",
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"AVDD2",
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"CPVDD",
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"SPKVDD1",
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"SPKVDD2",
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};
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static const char *wm8994_main_supplies[] = {
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"DBVDD",
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"DCVDD",
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"AVDD1",
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"AVDD2",
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"CPVDD",
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"SPKVDD1",
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"SPKVDD2",
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};
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static const char *wm8958_main_supplies[] = {
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"DBVDD1",
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"DBVDD2",
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"DBVDD3",
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"DCVDD",
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"AVDD1",
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"AVDD2",
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"CPVDD",
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"SPKVDD1",
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"SPKVDD2",
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};
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#ifdef CONFIG_PM
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static int wm8994_suspend(struct device *dev)
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{
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struct wm8994 *wm8994 = dev_get_drvdata(dev);
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int ret;
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/* Don't actually go through with the suspend if the CODEC is
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* still active for accessory detect. */
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switch (wm8994->type) {
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case WM8958:
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case WM1811:
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ret = wm8994_reg_read(wm8994, WM8958_MIC_DETECT_1);
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if (ret < 0) {
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dev_err(dev, "Failed to read power status: %d\n", ret);
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} else if (ret & WM8958_MICD_ENA) {
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dev_dbg(dev, "CODEC still active, ignoring suspend\n");
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return 0;
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}
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break;
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default:
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break;
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}
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/* Disable LDO pulldowns while the device is suspended if we
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* don't know that something will be driving them. */
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if (!wm8994->ldo_ena_always_driven)
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wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2,
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WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD,
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WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD);
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/* Explicitly put the device into reset in case regulators
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* don't get disabled in order to ensure consistent restart.
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*/
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wm8994_reg_write(wm8994, WM8994_SOFTWARE_RESET,
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wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET));
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regcache_mark_dirty(wm8994->regmap);
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/* Restore GPIO registers to prevent problems with mismatched
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* pin configurations.
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*/
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ret = regcache_sync_region(wm8994->regmap, WM8994_GPIO_1,
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WM8994_GPIO_11);
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if (ret != 0)
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dev_err(dev, "Failed to restore GPIO registers: %d\n", ret);
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/* In case one of the GPIOs is used as a wake input. */
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ret = regcache_sync_region(wm8994->regmap,
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WM8994_INTERRUPT_STATUS_1_MASK,
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WM8994_INTERRUPT_STATUS_1_MASK);
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if (ret != 0)
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dev_err(dev, "Failed to restore interrupt mask: %d\n", ret);
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regcache_cache_only(wm8994->regmap, true);
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wm8994->suspended = true;
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ret = regulator_bulk_disable(wm8994->num_supplies,
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wm8994->supplies);
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if (ret != 0) {
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dev_err(dev, "Failed to disable supplies: %d\n", ret);
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return ret;
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}
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return 0;
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}
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static int wm8994_resume(struct device *dev)
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{
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struct wm8994 *wm8994 = dev_get_drvdata(dev);
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int ret;
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/* We may have lied to the PM core about suspending */
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if (!wm8994->suspended)
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return 0;
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ret = regulator_bulk_enable(wm8994->num_supplies,
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wm8994->supplies);
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if (ret != 0) {
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dev_err(dev, "Failed to enable supplies: %d\n", ret);
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return ret;
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}
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regcache_cache_only(wm8994->regmap, false);
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ret = regcache_sync(wm8994->regmap);
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if (ret != 0) {
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dev_err(dev, "Failed to restore register map: %d\n", ret);
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goto err_enable;
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}
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/* Disable LDO pulldowns while the device is active */
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wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2,
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WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD,
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0);
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wm8994->suspended = false;
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return 0;
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err_enable:
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regulator_bulk_disable(wm8994->num_supplies, wm8994->supplies);
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return ret;
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}
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#endif
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#ifdef CONFIG_REGULATOR
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static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo)
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{
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struct wm8994_ldo_pdata *ldo_pdata;
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if (!pdata)
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return 0;
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ldo_pdata = &pdata->ldo[ldo];
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if (!ldo_pdata->init_data)
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return 0;
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return ldo_pdata->init_data->num_consumer_supplies != 0;
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}
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#else
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static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo)
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{
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return 0;
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}
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#endif
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static const struct reg_sequence wm8994_revc_patch[] = {
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{ 0x102, 0x3 },
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{ 0x56, 0x3 },
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{ 0x817, 0x0 },
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{ 0x102, 0x0 },
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};
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static const struct reg_sequence wm8958_reva_patch[] = {
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{ 0x102, 0x3 },
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{ 0xcb, 0x81 },
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{ 0x817, 0x0 },
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{ 0x102, 0x0 },
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};
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static const struct reg_sequence wm1811_reva_patch[] = {
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{ 0x102, 0x3 },
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{ 0x56, 0xc07 },
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{ 0x5d, 0x7e },
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{ 0x5e, 0x0 },
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{ 0x102, 0x0 },
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};
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#ifdef CONFIG_OF
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static int wm8994_set_pdata_from_of(struct wm8994 *wm8994)
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{
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struct device_node *np = wm8994->dev->of_node;
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struct wm8994_pdata *pdata = &wm8994->pdata;
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int i;
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if (!np)
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return 0;
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if (of_property_read_u32_array(np, "wlf,gpio-cfg", pdata->gpio_defaults,
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ARRAY_SIZE(pdata->gpio_defaults)) >= 0) {
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for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) {
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if (wm8994->pdata.gpio_defaults[i] == 0)
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pdata->gpio_defaults[i]
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= WM8994_CONFIGURE_GPIO;
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}
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}
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of_property_read_u32_array(np, "wlf,micbias-cfg", pdata->micbias,
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ARRAY_SIZE(pdata->micbias));
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pdata->lineout1_diff = true;
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pdata->lineout2_diff = true;
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if (of_find_property(np, "wlf,lineout1-se", NULL))
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pdata->lineout1_diff = false;
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if (of_find_property(np, "wlf,lineout2-se", NULL))
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pdata->lineout2_diff = false;
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if (of_find_property(np, "wlf,lineout1-feedback", NULL))
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pdata->lineout1fb = true;
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if (of_find_property(np, "wlf,lineout2-feedback", NULL))
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pdata->lineout2fb = true;
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if (of_find_property(np, "wlf,ldoena-always-driven", NULL))
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pdata->lineout2fb = true;
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pdata->spkmode_pu = of_property_read_bool(np, "wlf,spkmode-pu");
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pdata->csnaddr_pd = of_property_read_bool(np, "wlf,csnaddr-pd");
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return 0;
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}
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#else
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static int wm8994_set_pdata_from_of(struct wm8994 *wm8994)
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{
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return 0;
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}
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#endif
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/*
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* Instantiate the generic non-control parts of the device.
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*/
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static int wm8994_device_init(struct wm8994 *wm8994, int irq)
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{
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struct wm8994_pdata *pdata;
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struct regmap_config *regmap_config;
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const struct reg_sequence *regmap_patch = NULL;
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const char *devname;
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int ret, i, patch_regs = 0;
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int pulls = 0;
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if (dev_get_platdata(wm8994->dev)) {
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pdata = dev_get_platdata(wm8994->dev);
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wm8994->pdata = *pdata;
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}
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pdata = &wm8994->pdata;
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ret = wm8994_set_pdata_from_of(wm8994);
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if (ret != 0)
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return ret;
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dev_set_drvdata(wm8994->dev, wm8994);
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/* Add the on-chip regulators first for bootstrapping */
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ret = mfd_add_devices(wm8994->dev, 0,
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wm8994_regulator_devs,
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ARRAY_SIZE(wm8994_regulator_devs),
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NULL, 0, NULL);
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if (ret != 0) {
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dev_err(wm8994->dev, "Failed to add children: %d\n", ret);
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goto err;
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}
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switch (wm8994->type) {
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case WM1811:
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wm8994->num_supplies = ARRAY_SIZE(wm1811_main_supplies);
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break;
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case WM8994:
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wm8994->num_supplies = ARRAY_SIZE(wm8994_main_supplies);
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break;
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case WM8958:
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wm8994->num_supplies = ARRAY_SIZE(wm8958_main_supplies);
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break;
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default:
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BUG();
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goto err;
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}
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wm8994->supplies = devm_kcalloc(wm8994->dev,
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wm8994->num_supplies,
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sizeof(struct regulator_bulk_data),
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GFP_KERNEL);
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if (!wm8994->supplies) {
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ret = -ENOMEM;
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goto err;
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}
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switch (wm8994->type) {
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case WM1811:
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for (i = 0; i < ARRAY_SIZE(wm1811_main_supplies); i++)
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wm8994->supplies[i].supply = wm1811_main_supplies[i];
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break;
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case WM8994:
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for (i = 0; i < ARRAY_SIZE(wm8994_main_supplies); i++)
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wm8994->supplies[i].supply = wm8994_main_supplies[i];
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break;
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case WM8958:
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for (i = 0; i < ARRAY_SIZE(wm8958_main_supplies); i++)
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wm8994->supplies[i].supply = wm8958_main_supplies[i];
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break;
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default:
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BUG();
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goto err;
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}
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/*
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* Can't use devres helper here as some of the supplies are provided by
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* wm8994->dev's children (regulators) and those regulators are
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* unregistered by the devres core before the supplies are freed.
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*/
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ret = regulator_bulk_get(wm8994->dev, wm8994->num_supplies,
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wm8994->supplies);
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if (ret != 0) {
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dev_err(wm8994->dev, "Failed to get supplies: %d\n", ret);
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goto err;
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}
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ret = regulator_bulk_enable(wm8994->num_supplies, wm8994->supplies);
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if (ret != 0) {
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dev_err(wm8994->dev, "Failed to enable supplies: %d\n", ret);
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goto err_regulator_free;
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}
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ret = wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET);
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if (ret < 0) {
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dev_err(wm8994->dev, "Failed to read ID register\n");
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goto err_enable;
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}
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switch (ret) {
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case 0x1811:
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devname = "WM1811";
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if (wm8994->type != WM1811)
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dev_warn(wm8994->dev, "Device registered as type %d\n",
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wm8994->type);
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wm8994->type = WM1811;
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break;
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case 0x8994:
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devname = "WM8994";
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if (wm8994->type != WM8994)
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dev_warn(wm8994->dev, "Device registered as type %d\n",
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wm8994->type);
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wm8994->type = WM8994;
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break;
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case 0x8958:
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devname = "WM8958";
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if (wm8994->type != WM8958)
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dev_warn(wm8994->dev, "Device registered as type %d\n",
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wm8994->type);
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wm8994->type = WM8958;
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break;
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default:
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dev_err(wm8994->dev, "Device is not a WM8994, ID is %x\n",
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ret);
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ret = -EINVAL;
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goto err_enable;
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}
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ret = wm8994_reg_read(wm8994, WM8994_CHIP_REVISION);
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if (ret < 0) {
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dev_err(wm8994->dev, "Failed to read revision register: %d\n",
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ret);
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goto err_enable;
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}
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wm8994->revision = ret & WM8994_CHIP_REV_MASK;
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wm8994->cust_id = (ret & WM8994_CUST_ID_MASK) >> WM8994_CUST_ID_SHIFT;
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switch (wm8994->type) {
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case WM8994:
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switch (wm8994->revision) {
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case 0:
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case 1:
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dev_warn(wm8994->dev,
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"revision %c not fully supported\n",
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'A' + wm8994->revision);
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break;
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case 2:
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case 3:
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default:
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regmap_patch = wm8994_revc_patch;
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patch_regs = ARRAY_SIZE(wm8994_revc_patch);
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break;
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}
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break;
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case WM8958:
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switch (wm8994->revision) {
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case 0:
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regmap_patch = wm8958_reva_patch;
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patch_regs = ARRAY_SIZE(wm8958_reva_patch);
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break;
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default:
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break;
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}
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break;
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case WM1811:
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/* Revision C did not change the relevant layer */
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if (wm8994->revision > 1)
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wm8994->revision++;
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regmap_patch = wm1811_reva_patch;
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patch_regs = ARRAY_SIZE(wm1811_reva_patch);
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break;
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default:
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break;
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}
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dev_info(wm8994->dev, "%s revision %c CUST_ID %02x\n", devname,
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'A' + wm8994->revision, wm8994->cust_id);
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switch (wm8994->type) {
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case WM1811:
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regmap_config = &wm1811_regmap_config;
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break;
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case WM8994:
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regmap_config = &wm8994_regmap_config;
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break;
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case WM8958:
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regmap_config = &wm8958_regmap_config;
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break;
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default:
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dev_err(wm8994->dev, "Unknown device type %d\n", wm8994->type);
|
|
ret = -EINVAL;
|
|
goto err_enable;
|
|
}
|
|
|
|
ret = regmap_reinit_cache(wm8994->regmap, regmap_config);
|
|
if (ret != 0) {
|
|
dev_err(wm8994->dev, "Failed to reinit register cache: %d\n",
|
|
ret);
|
|
goto err_enable;
|
|
}
|
|
|
|
/* Explicitly put the device into reset in case regulators
|
|
* don't get disabled in order to ensure we know the device
|
|
* state.
|
|
*/
|
|
ret = wm8994_reg_write(wm8994, WM8994_SOFTWARE_RESET,
|
|
wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET));
|
|
if (ret != 0) {
|
|
dev_err(wm8994->dev, "Failed to reset device: %d\n", ret);
|
|
goto err_enable;
|
|
}
|
|
|
|
if (regmap_patch) {
|
|
ret = regmap_register_patch(wm8994->regmap, regmap_patch,
|
|
patch_regs);
|
|
if (ret != 0) {
|
|
dev_err(wm8994->dev, "Failed to register patch: %d\n",
|
|
ret);
|
|
goto err_enable;
|
|
}
|
|
}
|
|
|
|
wm8994->irq_base = pdata->irq_base;
|
|
wm8994->gpio_base = pdata->gpio_base;
|
|
|
|
/* GPIO configuration is only applied if it's non-zero */
|
|
for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) {
|
|
if (pdata->gpio_defaults[i]) {
|
|
wm8994_set_bits(wm8994, WM8994_GPIO_1 + i,
|
|
0xffff, pdata->gpio_defaults[i]);
|
|
}
|
|
}
|
|
|
|
wm8994->ldo_ena_always_driven = pdata->ldo_ena_always_driven;
|
|
|
|
if (pdata->spkmode_pu)
|
|
pulls |= WM8994_SPKMODE_PU;
|
|
if (pdata->csnaddr_pd)
|
|
pulls |= WM8994_CSNADDR_PD;
|
|
|
|
/* Disable unneeded pulls */
|
|
wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2,
|
|
WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD |
|
|
WM8994_SPKMODE_PU | WM8994_CSNADDR_PD,
|
|
pulls);
|
|
|
|
/* In some system designs where the regulators are not in use,
|
|
* we can achieve a small reduction in leakage currents by
|
|
* floating LDO outputs. This bit makes no difference if the
|
|
* LDOs are enabled, it only affects cases where the LDOs were
|
|
* in operation and are then disabled.
|
|
*/
|
|
for (i = 0; i < WM8994_NUM_LDO_REGS; i++) {
|
|
if (wm8994_ldo_in_use(pdata, i))
|
|
wm8994_set_bits(wm8994, WM8994_LDO_1 + i,
|
|
WM8994_LDO1_DISCH, WM8994_LDO1_DISCH);
|
|
else
|
|
wm8994_set_bits(wm8994, WM8994_LDO_1 + i,
|
|
WM8994_LDO1_DISCH, 0);
|
|
}
|
|
|
|
wm8994_irq_init(wm8994);
|
|
|
|
ret = mfd_add_devices(wm8994->dev, -1,
|
|
wm8994_devs, ARRAY_SIZE(wm8994_devs),
|
|
NULL, 0, NULL);
|
|
if (ret != 0) {
|
|
dev_err(wm8994->dev, "Failed to add children: %d\n", ret);
|
|
goto err_irq;
|
|
}
|
|
|
|
pm_runtime_enable(wm8994->dev);
|
|
pm_runtime_idle(wm8994->dev);
|
|
|
|
return 0;
|
|
|
|
err_irq:
|
|
wm8994_irq_exit(wm8994);
|
|
err_enable:
|
|
regulator_bulk_disable(wm8994->num_supplies,
|
|
wm8994->supplies);
|
|
err_regulator_free:
|
|
regulator_bulk_free(wm8994->num_supplies, wm8994->supplies);
|
|
err:
|
|
mfd_remove_devices(wm8994->dev);
|
|
return ret;
|
|
}
|
|
|
|
static void wm8994_device_exit(struct wm8994 *wm8994)
|
|
{
|
|
pm_runtime_disable(wm8994->dev);
|
|
wm8994_irq_exit(wm8994);
|
|
regulator_bulk_disable(wm8994->num_supplies, wm8994->supplies);
|
|
regulator_bulk_free(wm8994->num_supplies, wm8994->supplies);
|
|
mfd_remove_devices(wm8994->dev);
|
|
}
|
|
|
|
static const struct of_device_id wm8994_of_match[] = {
|
|
{ .compatible = "wlf,wm1811", .data = (void *)WM1811 },
|
|
{ .compatible = "wlf,wm8994", .data = (void *)WM8994 },
|
|
{ .compatible = "wlf,wm8958", .data = (void *)WM8958 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, wm8994_of_match);
|
|
|
|
static int wm8994_i2c_probe(struct i2c_client *i2c,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
const struct of_device_id *of_id;
|
|
struct wm8994 *wm8994;
|
|
int ret;
|
|
|
|
wm8994 = devm_kzalloc(&i2c->dev, sizeof(struct wm8994), GFP_KERNEL);
|
|
if (wm8994 == NULL)
|
|
return -ENOMEM;
|
|
|
|
i2c_set_clientdata(i2c, wm8994);
|
|
wm8994->dev = &i2c->dev;
|
|
wm8994->irq = i2c->irq;
|
|
|
|
if (i2c->dev.of_node) {
|
|
of_id = of_match_device(wm8994_of_match, &i2c->dev);
|
|
if (of_id)
|
|
wm8994->type = (enum wm8994_type)of_id->data;
|
|
} else {
|
|
wm8994->type = id->driver_data;
|
|
}
|
|
|
|
wm8994->regmap = devm_regmap_init_i2c(i2c, &wm8994_base_regmap_config);
|
|
if (IS_ERR(wm8994->regmap)) {
|
|
ret = PTR_ERR(wm8994->regmap);
|
|
dev_err(wm8994->dev, "Failed to allocate register map: %d\n",
|
|
ret);
|
|
return ret;
|
|
}
|
|
|
|
return wm8994_device_init(wm8994, i2c->irq);
|
|
}
|
|
|
|
static int wm8994_i2c_remove(struct i2c_client *i2c)
|
|
{
|
|
struct wm8994 *wm8994 = i2c_get_clientdata(i2c);
|
|
|
|
wm8994_device_exit(wm8994);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id wm8994_i2c_id[] = {
|
|
{ "wm1811", WM1811 },
|
|
{ "wm1811a", WM1811 },
|
|
{ "wm8994", WM8994 },
|
|
{ "wm8958", WM8958 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, wm8994_i2c_id);
|
|
|
|
static const struct dev_pm_ops wm8994_pm_ops = {
|
|
SET_RUNTIME_PM_OPS(wm8994_suspend, wm8994_resume, NULL)
|
|
};
|
|
|
|
static struct i2c_driver wm8994_i2c_driver = {
|
|
.driver = {
|
|
.name = "wm8994",
|
|
.pm = &wm8994_pm_ops,
|
|
.of_match_table = of_match_ptr(wm8994_of_match),
|
|
},
|
|
.probe = wm8994_i2c_probe,
|
|
.remove = wm8994_i2c_remove,
|
|
.id_table = wm8994_i2c_id,
|
|
};
|
|
|
|
module_i2c_driver(wm8994_i2c_driver);
|
|
|
|
MODULE_DESCRIPTION("Core support for the WM8994 audio CODEC");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
|