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-rw-r--r--drivers/extcon/Kconfig8
-rw-r--r--drivers/extcon/Makefile1
-rw-r--r--drivers/extcon/extcon-arizona.c491
3 files changed, 500 insertions, 0 deletions
diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig
index 29c5cf8..bb385ac 100644
--- a/drivers/extcon/Kconfig
+++ b/drivers/extcon/Kconfig
@@ -29,4 +29,12 @@ config EXTCON_MAX8997
Maxim MAX8997 PMIC. The MAX8997 MUIC is a USB port accessory
detector and switch.
+config EXTCON_ARIZONA
+ tristate "Wolfson Arizona EXTCON support"
+ depends on MFD_ARIZONA
+ help
+ Say Y here to enable support for external accessory detection
+ with Wolfson Arizona devices. These are audio CODECs with
+ advanced audio accessory detection support.
+
endif # MULTISTATE_SWITCH
diff --git a/drivers/extcon/Makefile b/drivers/extcon/Makefile
index 86020bd..e932caa 100644
--- a/drivers/extcon/Makefile
+++ b/drivers/extcon/Makefile
@@ -5,3 +5,4 @@
obj-$(CONFIG_EXTCON) += extcon_class.o
obj-$(CONFIG_EXTCON_GPIO) += extcon_gpio.o
obj-$(CONFIG_EXTCON_MAX8997) += extcon-max8997.o
+obj-$(CONFIG_EXTCON_ARIZONA) += extcon-arizona.o
diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
new file mode 100644
index 0000000..b068bc9
--- /dev/null
+++ b/drivers/extcon/extcon-arizona.c
@@ -0,0 +1,491 @@
+/*
+ * extcon-arizona.c - Extcon driver Wolfson Arizona devices
+ *
+ * Copyright (C) 2012 Wolfson Microelectronics plc
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h>
+#include <linux/extcon.h>
+
+#include <linux/mfd/arizona/core.h>
+#include <linux/mfd/arizona/pdata.h>
+#include <linux/mfd/arizona/registers.h>
+
+struct arizona_extcon_info {
+ struct device *dev;
+ struct arizona *arizona;
+ struct mutex lock;
+ struct regulator *micvdd;
+
+ int micd_mode;
+ const struct arizona_micd_config *micd_modes;
+ int micd_num_modes;
+
+ bool micd_reva;
+
+ bool mic;
+ bool detecting;
+ int jack_flips;
+
+ struct extcon_dev edev;
+};
+
+static const struct arizona_micd_config micd_default_modes[] = {
+ { ARIZONA_ACCDET_SRC, 1 << ARIZONA_MICD_BIAS_SRC_SHIFT, 0 },
+ { 0, 2 << ARIZONA_MICD_BIAS_SRC_SHIFT, 1 },
+};
+
+#define ARIZONA_CABLE_MECHANICAL "Mechanical"
+#define ARIZONA_CABLE_HEADPHONE "Headphone"
+#define ARIZONA_CABLE_HEADSET "Headset"
+
+static const char *arizona_cable[] = {
+ ARIZONA_CABLE_MECHANICAL,
+ ARIZONA_CABLE_HEADSET,
+ ARIZONA_CABLE_HEADPHONE,
+ NULL,
+};
+
+static const u32 arizona_exclusions[] = {
+ 0x6, /* Headphone and headset */
+ 0,
+};
+
+static void arizona_extcon_set_mode(struct arizona_extcon_info *info, int mode)
+{
+ struct arizona *arizona = info->arizona;
+
+ gpio_set_value_cansleep(arizona->pdata.micd_pol_gpio,
+ info->micd_modes[mode].gpio);
+ regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
+ ARIZONA_MICD_BIAS_SRC_MASK,
+ info->micd_modes[mode].bias);
+ regmap_update_bits(arizona->regmap, ARIZONA_ACCESSORY_DETECT_MODE_1,
+ ARIZONA_ACCDET_SRC, info->micd_modes[mode].src);
+
+ info->micd_mode = mode;
+
+ dev_dbg(arizona->dev, "Set jack polarity to %d\n", mode);
+}
+
+static void arizona_start_mic(struct arizona_extcon_info *info)
+{
+ struct arizona *arizona = info->arizona;
+ bool change;
+ int ret;
+
+ info->detecting = true;
+ info->mic = false;
+ info->jack_flips = 0;
+
+ /* Microphone detection can't use idle mode */
+ pm_runtime_get(info->dev);
+
+ ret = regulator_enable(info->micvdd);
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to enable MICVDD: %d\n",
+ ret);
+ }
+
+ if (info->micd_reva) {
+ regmap_write(arizona->regmap, 0x80, 0x3);
+ regmap_write(arizona->regmap, 0x294, 0);
+ regmap_write(arizona->regmap, 0x80, 0x0);
+ }
+
+ regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
+ ARIZONA_MICD_ENA, ARIZONA_MICD_ENA,
+ &change);
+ if (!change) {
+ regulator_disable(info->micvdd);
+ pm_runtime_put_autosuspend(info->dev);
+ }
+}
+
+static void arizona_stop_mic(struct arizona_extcon_info *info)
+{
+ struct arizona *arizona = info->arizona;
+ bool change;
+
+ regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
+ ARIZONA_MICD_ENA, 0,
+ &change);
+
+ if (info->micd_reva) {
+ regmap_write(arizona->regmap, 0x80, 0x3);
+ regmap_write(arizona->regmap, 0x294, 2);
+ regmap_write(arizona->regmap, 0x80, 0x0);
+ }
+
+ if (change) {
+ regulator_disable(info->micvdd);
+ pm_runtime_put_autosuspend(info->dev);
+ }
+}
+
+static irqreturn_t arizona_micdet(int irq, void *data)
+{
+ struct arizona_extcon_info *info = data;
+ struct arizona *arizona = info->arizona;
+ unsigned int val;
+ int ret;
+
+ mutex_lock(&info->lock);
+
+ ret = regmap_read(arizona->regmap, ARIZONA_MIC_DETECT_3, &val);
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to read MICDET: %d\n", ret);
+ return IRQ_NONE;
+ }
+
+ dev_dbg(arizona->dev, "MICDET: %x\n", val);
+
+ if (!(val & ARIZONA_MICD_VALID)) {
+ dev_warn(arizona->dev, "Microphone detection state invalid\n");
+ mutex_unlock(&info->lock);
+ return IRQ_NONE;
+ }
+
+ /* Due to jack detect this should never happen */
+ if (!(val & ARIZONA_MICD_STS)) {
+ dev_warn(arizona->dev, "Detected open circuit\n");
+ info->detecting = false;
+ goto handled;
+ }
+
+ /* If we got a high impedence we should have a headset, report it. */
+ if (info->detecting && (val & 0x400)) {
+ ret = extcon_set_cable_state(&info->edev,
+ ARIZONA_CABLE_HEADSET, true);
+
+ if (ret != 0)
+ dev_err(arizona->dev, "Headset report failed: %d\n",
+ ret);
+
+ info->mic = true;
+ info->detecting = false;
+ goto handled;
+ }
+
+ /* If we detected a lower impedence during initial startup
+ * then we probably have the wrong polarity, flip it. Don't
+ * do this for the lowest impedences to speed up detection of
+ * plain headphones. If both polarities report a low
+ * impedence then give up and report headphones.
+ */
+ if (info->detecting && (val & 0x3f8)) {
+ info->jack_flips++;
+
+ if (info->jack_flips >= info->micd_num_modes) {
+ dev_dbg(arizona->dev, "Detected headphone\n");
+ info->detecting = false;
+ ret = extcon_set_cable_state(&info->edev,
+ ARIZONA_CABLE_HEADPHONE,
+ true);
+ if (ret != 0)
+ dev_err(arizona->dev,
+ "Headphone report failed: %d\n",
+ ret);
+ } else {
+ info->micd_mode++;
+ if (info->micd_mode == info->micd_num_modes)
+ info->micd_mode = 0;
+ arizona_extcon_set_mode(info, info->micd_mode);
+
+ info->jack_flips++;
+ }
+
+ goto handled;
+ }
+
+ /*
+ * If we're still detecting and we detect a short then we've
+ * got a headphone. Otherwise it's a button press, the
+ * button reporting is stubbed out for now.
+ */
+ if (val & 0x3fc) {
+ if (info->mic) {
+ dev_dbg(arizona->dev, "Mic button detected\n");
+
+ } else if (info->detecting) {
+ dev_dbg(arizona->dev, "Headphone detected\n");
+ info->detecting = false;
+ arizona_stop_mic(info);
+
+ ret = extcon_set_cable_state(&info->edev,
+ ARIZONA_CABLE_HEADPHONE,
+ true);
+ if (ret != 0)
+ dev_err(arizona->dev,
+ "Headphone report failed: %d\n",
+ ret);
+ } else {
+ dev_warn(arizona->dev, "Button with no mic: %x\n",
+ val);
+ }
+ } else {
+ dev_dbg(arizona->dev, "Mic button released\n");
+ }
+
+handled:
+ pm_runtime_mark_last_busy(info->dev);
+ mutex_unlock(&info->lock);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t arizona_jackdet(int irq, void *data)
+{
+ struct arizona_extcon_info *info = data;
+ struct arizona *arizona = info->arizona;
+ unsigned int val;
+ int ret;
+
+ pm_runtime_get_sync(info->dev);
+
+ mutex_lock(&info->lock);
+
+ ret = regmap_read(arizona->regmap, ARIZONA_AOD_IRQ_RAW_STATUS, &val);
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to read jackdet status: %d\n",
+ ret);
+ mutex_unlock(&info->lock);
+ pm_runtime_put_autosuspend(info->dev);
+ return IRQ_NONE;
+ }
+
+ if (val & ARIZONA_JD1_STS) {
+ dev_dbg(arizona->dev, "Detected jack\n");
+ ret = extcon_set_cable_state(&info->edev,
+ ARIZONA_CABLE_MECHANICAL, true);
+
+ if (ret != 0)
+ dev_err(arizona->dev, "Mechanical report failed: %d\n",
+ ret);
+
+ arizona_start_mic(info);
+ } else {
+ dev_dbg(arizona->dev, "Detected jack removal\n");
+
+ arizona_stop_mic(info);
+
+ ret = extcon_update_state(&info->edev, 0xffffffff, 0);
+ if (ret != 0)
+ dev_err(arizona->dev, "Removal report failed: %d\n",
+ ret);
+ }
+
+ mutex_unlock(&info->lock);
+
+ pm_runtime_mark_last_busy(info->dev);
+ pm_runtime_put_autosuspend(info->dev);
+
+ return IRQ_HANDLED;
+}
+
+static int __devinit arizona_extcon_probe(struct platform_device *pdev)
+{
+ struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
+ struct arizona_pdata *pdata;
+ struct arizona_extcon_info *info;
+ int ret, mode;
+
+ pdata = dev_get_platdata(arizona->dev);
+
+ info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
+ if (!info) {
+ dev_err(&pdev->dev, "failed to allocate memory\n");
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ info->micvdd = devm_regulator_get(arizona->dev, "MICVDD");
+ if (IS_ERR(info->micvdd)) {
+ ret = PTR_ERR(info->micvdd);
+ dev_err(arizona->dev, "Failed to get MICVDD: %d\n", ret);
+ goto err;
+ }
+
+ mutex_init(&info->lock);
+ info->arizona = arizona;
+ info->dev = &pdev->dev;
+ info->detecting = true;
+ platform_set_drvdata(pdev, info);
+
+ switch (arizona->type) {
+ case WM5102:
+ switch (arizona->rev) {
+ case 0:
+ info->micd_reva = true;
+ break;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+
+ info->edev.name = "Headset Jack";
+ info->edev.supported_cable = arizona_cable;
+ info->edev.mutually_exclusive = arizona_exclusions;
+
+ ret = extcon_dev_register(&info->edev, arizona->dev);
+ if (ret < 0) {
+ dev_err(arizona->dev, "extcon_dev_regster() failed: %d\n",
+ ret);
+ goto err;
+ }
+
+ if (pdata->num_micd_configs) {
+ info->micd_modes = pdata->micd_configs;
+ info->micd_num_modes = pdata->num_micd_configs;
+ } else {
+ info->micd_modes = micd_default_modes;
+ info->micd_num_modes = ARRAY_SIZE(micd_default_modes);
+ }
+
+ if (arizona->pdata.micd_pol_gpio > 0) {
+ if (info->micd_modes[0].gpio)
+ mode = GPIOF_OUT_INIT_HIGH;
+ else
+ mode = GPIOF_OUT_INIT_LOW;
+
+ ret = devm_gpio_request_one(&pdev->dev,
+ arizona->pdata.micd_pol_gpio,
+ mode,
+ "MICD polarity");
+ if (ret != 0) {
+ dev_err(arizona->dev, "Failed to request GPIO%d: %d\n",
+ arizona->pdata.micd_pol_gpio, ret);
+ goto err_register;
+ }
+ }
+
+ arizona_extcon_set_mode(info, 0);
+
+ pm_runtime_enable(&pdev->dev);
+ pm_runtime_idle(&pdev->dev);
+ pm_runtime_get_sync(&pdev->dev);
+
+ ret = arizona_request_irq(arizona, ARIZONA_IRQ_JD_RISE,
+ "JACKDET rise", arizona_jackdet, info);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "Failed to get JACKDET rise IRQ: %d\n",
+ ret);
+ goto err_register;
+ }
+
+ ret = arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_RISE, 1);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "Failed to set JD rise IRQ wake: %d\n",
+ ret);
+ goto err_rise;
+ }
+
+ ret = arizona_request_irq(arizona, ARIZONA_IRQ_JD_FALL,
+ "JACKDET fall", arizona_jackdet, info);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "Failed to get JD fall IRQ: %d\n", ret);
+ goto err_rise_wake;
+ }
+
+ ret = arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_FALL, 1);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "Failed to set JD fall IRQ wake: %d\n",
+ ret);
+ goto err_fall;
+ }
+
+ ret = arizona_request_irq(arizona, ARIZONA_IRQ_MICDET,
+ "MICDET", arizona_micdet, info);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "Failed to get MICDET IRQ: %d\n", ret);
+ goto err_fall_wake;
+ }
+
+ regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
+ ARIZONA_MICD_BIAS_STARTTIME_MASK |
+ ARIZONA_MICD_RATE_MASK,
+ 7 << ARIZONA_MICD_BIAS_STARTTIME_SHIFT |
+ 8 << ARIZONA_MICD_RATE_SHIFT);
+
+ arizona_clk32k_enable(arizona);
+ regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_DEBOUNCE,
+ ARIZONA_JD1_DB, ARIZONA_JD1_DB);
+ regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_ANALOGUE,
+ ARIZONA_JD1_ENA, ARIZONA_JD1_ENA);
+
+ pm_runtime_put(&pdev->dev);
+
+ return 0;
+
+err_fall_wake:
+ arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_FALL, 0);
+err_fall:
+ arizona_free_irq(arizona, ARIZONA_IRQ_JD_FALL, info);
+err_rise_wake:
+ arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_RISE, 0);
+err_rise:
+ arizona_free_irq(arizona, ARIZONA_IRQ_JD_RISE, info);
+err_register:
+ pm_runtime_disable(&pdev->dev);
+ extcon_dev_unregister(&info->edev);
+err:
+ return ret;
+}
+
+static int __devexit arizona_extcon_remove(struct platform_device *pdev)
+{
+ struct arizona_extcon_info *info = platform_get_drvdata(pdev);
+ struct arizona *arizona = info->arizona;
+
+ pm_runtime_disable(&pdev->dev);
+
+ arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_RISE, 0);
+ arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_FALL, 0);
+ arizona_free_irq(arizona, ARIZONA_IRQ_MICDET, info);
+ arizona_free_irq(arizona, ARIZONA_IRQ_JD_RISE, info);
+ arizona_free_irq(arizona, ARIZONA_IRQ_JD_FALL, info);
+ regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_ANALOGUE,
+ ARIZONA_JD1_ENA, 0);
+ arizona_clk32k_disable(arizona);
+ extcon_dev_unregister(&info->edev);
+
+ return 0;
+}
+
+static struct platform_driver arizona_extcon_driver = {
+ .driver = {
+ .name = "arizona-extcon",
+ .owner = THIS_MODULE,
+ },
+ .probe = arizona_extcon_probe,
+ .remove = __devexit_p(arizona_extcon_remove),
+};
+
+module_platform_driver(arizona_extcon_driver);
+
+MODULE_DESCRIPTION("Arizona Extcon driver");
+MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:extcon-arizona");
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