7 files changed, 289 insertions, 20 deletions

diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig
index e175c8ed4ec..07122a9ef36 100644
--- a/drivers/extcon/Kconfig
+++ b/drivers/extcon/Kconfig
@@ -21,6 +21,12 @@ config EXTCON_GPIO
           Say Y here to enable GPIO based extcon support. Note that GPIO
           extcon supports single state per extcon instance.
 
+config EXTCON_ADC_JACK
+        tristate "ADC Jack extcon support"
+        depends on IIO
+        help
+          Say Y here to enable extcon device driver based on ADC values.
+
 config EXTCON_MAX77693
         tristate "MAX77693 EXTCON Support"
         depends on MFD_MAX77693
@@ -41,7 +47,7 @@ config EXTCON_MAX8997
 
 config EXTCON_ARIZONA
         tristate "Wolfson Arizona EXTCON support"
-        depends on MFD_ARIZONA
+        depends on MFD_ARIZONA && INPUT
         help
           Say Y here to enable support for external accessory detection
           with Wolfson Arizona devices. These are audio CODECs with
diff --git a/drivers/extcon/Makefile b/drivers/extcon/Makefile
index 88961b33234..f98a3c4d46e 100644
--- a/drivers/extcon/Makefile
+++ b/drivers/extcon/Makefile
@@ -2,8 +2,9 @@
 # Makefile for external connector class (extcon) devices
 #
 
-obj-$(CONFIG_EXTCON)            += extcon_class.o
-obj-$(CONFIG_EXTCON_GPIO)       += extcon_gpio.o
+obj-$(CONFIG_EXTCON)            += extcon-class.o
+obj-$(CONFIG_EXTCON_GPIO)       += extcon-gpio.o
+obj-$(CONFIG_EXTCON_ADC_JACK)   += extcon-adc-jack.o
 obj-$(CONFIG_EXTCON_MAX77693)   += extcon-max77693.o
 obj-$(CONFIG_EXTCON_MAX8997)    += extcon-max8997.o
 obj-$(CONFIG_EXTCON_ARIZONA)    += extcon-arizona.o
diff --git a/drivers/extcon/extcon-adc-jack.c b/drivers/extcon/extcon-adc-jack.c
new file mode 100644
index 00000000000..60ac3fbb4cd
--- /dev/null
+++ b/drivers/extcon/extcon-adc-jack.c
@@ -0,0 +1,198 @@
+/*
+ * drivers/extcon/extcon-adc-jack.c
+ *
+ * Analog Jack extcon driver with ADC-based detection capability.
+ *
+ * Copyright (C) 2012 Samsung Electronics
+ * MyungJoo Ham <myungjoo.ham@samsung.com>
+ *
+ * Modified for calling to IIO to get adc by <anish.singh@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/slab.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/iio/consumer.h>
+#include <linux/extcon/extcon-adc-jack.h>
+#include <linux/extcon.h>
+
+/**
+ * struct adc_jack_data - internal data for adc_jack device driver
+ * @edev        - extcon device.
+ * @cable_names - list of supported cables.
+ * @num_cables  - size of cable_names.
+ * @adc_conditions       - list of adc value conditions.
+ * @num_conditions       - size of adc_conditions.
+ * @irq         - irq number of attach/detach event (0 if not exist).
+ * @handling_delay      - interrupt handler will schedule extcon event
+ *                      handling at handling_delay jiffies.
+ * @handler     - extcon event handler called by interrupt handler.
+ * @chan       - iio channel being queried.
+ */
+struct adc_jack_data {
+        struct extcon_dev edev;
+
+        const char **cable_names;
+        int num_cables;
+        struct adc_jack_cond *adc_conditions;
+        int num_conditions;
+
+        int irq;
+        unsigned long handling_delay; /* in jiffies */
+        struct delayed_work handler;
+
+        struct iio_channel *chan;
+};
+
+static void adc_jack_handler(struct work_struct *work)
+{
+        struct adc_jack_data *data = container_of(to_delayed_work(work),
+                        struct adc_jack_data,
+                        handler);
+        u32 state = 0;
+        int ret, adc_val;
+        int i;
+
+        ret = iio_read_channel_raw(data->chan, &adc_val);
+        if (ret < 0) {
+                dev_err(data->edev.dev, "read channel() error: %d\n", ret);
+                return;
+        }
+
+        /* Get state from adc value with adc_conditions */
+        for (i = 0; i < data->num_conditions; i++) {
+                struct adc_jack_cond *def = &data->adc_conditions[i];
+                if (!def->state)
+                        break;
+                if (def->min_adc <= adc_val && def->max_adc >= adc_val) {
+                        state = def->state;
+                        break;
+                }
+        }
+        /* if no def has met, it means state = 0 (no cables attached) */
+
+        extcon_set_state(&data->edev, state);
+}
+
+static irqreturn_t adc_jack_irq_thread(int irq, void *_data)
+{
+        struct adc_jack_data *data = _data;
+
+        schedule_delayed_work(&data->handler, data->handling_delay);
+        return IRQ_HANDLED;
+}
+
+static int __devinit adc_jack_probe(struct platform_device *pdev)
+{
+        struct adc_jack_data *data;
+        struct adc_jack_pdata *pdata = pdev->dev.platform_data;
+        int i, err = 0;
+
+        data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+        if (!data)
+                return -ENOMEM;
+
+        data->edev.name = pdata->name;
+
+        if (!pdata->cable_names) {
+                err = -EINVAL;
+                dev_err(&pdev->dev, "error: cable_names not defined.\n");
+                goto out;
+        }
+
+        data->edev.supported_cable = pdata->cable_names;
+
+        /* Check the length of array and set num_cables */
+        for (i = 0; data->edev.supported_cable[i]; i++)
+                ;
+        if (i == 0 || i > SUPPORTED_CABLE_MAX) {
+                err = -EINVAL;
+                dev_err(&pdev->dev, "error: pdata->cable_names size = %d\n",
+                                i - 1);
+                goto out;
+        }
+        data->num_cables = i;
+
+        if (!pdata->adc_conditions ||
+                        !pdata->adc_conditions[0].state) {
+                err = -EINVAL;
+                dev_err(&pdev->dev, "error: adc_conditions not defined.\n");
+                goto out;
+        }
+        data->adc_conditions = pdata->adc_conditions;
+
+        /* Check the length of array and set num_conditions */
+        for (i = 0; data->adc_conditions[i].state; i++)
+                ;
+        data->num_conditions = i;
+
+        data->chan = iio_channel_get(dev_name(&pdev->dev),
+                        pdata->consumer_channel);
+        if (IS_ERR(data->chan)) {
+                err = PTR_ERR(data->chan);
+                goto out;
+        }
+
+        data->handling_delay = msecs_to_jiffies(pdata->handling_delay_ms);
+
+        INIT_DELAYED_WORK_DEFERRABLE(&data->handler, adc_jack_handler);
+
+        platform_set_drvdata(pdev, data);
+
+        err = extcon_dev_register(&data->edev, &pdev->dev);
+        if (err)
+                goto out;
+
+        data->irq = platform_get_irq(pdev, 0);
+        if (!data->irq) {
+                dev_err(&pdev->dev, "platform_get_irq failed\n");
+                err = -ENODEV;
+                goto err_irq;
+        }
+
+        err = request_any_context_irq(data->irq, adc_jack_irq_thread,
+                        pdata->irq_flags, pdata->name, data);
+
+        if (err) {
+                dev_err(&pdev->dev, "error: irq %d\n", data->irq);
+                err = -EINVAL;
+                goto err_irq;
+        }
+
+        goto out;
+
+err_irq:
+        extcon_dev_unregister(&data->edev);
+out:
+        return err;
+}
+
+static int __devexit adc_jack_remove(struct platform_device *pdev)
+{
+        struct adc_jack_data *data = platform_get_drvdata(pdev);
+
+        free_irq(data->irq, data);
+        cancel_work_sync(&data->handler.work);
+        extcon_dev_unregister(&data->edev);
+
+        return 0;
+}
+
+static struct platform_driver adc_jack_driver = {
+        .probe          = adc_jack_probe,
+        .remove         = __devexit_p(adc_jack_remove),
+        .driver         = {
+                .name   = "adc-jack",
+                .owner  = THIS_MODULE,
+        },
+};
+
+module_platform_driver(adc_jack_driver);
diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
index 6c19833ed2d..cdab9e59829 100644
--- a/drivers/extcon/extcon-arizona.c
+++ b/drivers/extcon/extcon-arizona.c
@@ -21,6 +21,7 @@
 #include <linux/interrupt.h>
 #include <linux/err.h>
 #include <linux/gpio.h>
+#include <linux/input.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/regulator/consumer.h>
@@ -30,11 +31,14 @@
 #include <linux/mfd/arizona/pdata.h>
 #include <linux/mfd/arizona/registers.h>
 
+#define ARIZONA_NUM_BUTTONS 6
+
 struct arizona_extcon_info {
         struct device *dev;
         struct arizona *arizona;
         struct mutex lock;
         struct regulator *micvdd;
+        struct input_dev *input;
 
         int micd_mode;
         const struct arizona_micd_config *micd_modes;
@@ -54,6 +58,18 @@ static const struct arizona_micd_config micd_default_modes[] = {
         { 0,                  2 << ARIZONA_MICD_BIAS_SRC_SHIFT, 1 },
 };
 
+static struct {
+        u16 status;
+        int report;
+} arizona_lvl_to_key[ARIZONA_NUM_BUTTONS] = {
+        {  0x1, BTN_0 },
+        {  0x2, BTN_1 },
+        {  0x4, BTN_2 },
+        {  0x8, BTN_3 },
+        { 0x10, BTN_4 },
+        { 0x20, BTN_5 },
+};
+
 #define ARIZONA_CABLE_MECHANICAL 0
 #define ARIZONA_CABLE_MICROPHONE 1
 #define ARIZONA_CABLE_HEADPHONE  2
@@ -133,6 +149,7 @@ static void arizona_stop_mic(struct arizona_extcon_info *info)
 
         if (change) {
                 regulator_disable(info->micvdd);
+                pm_runtime_mark_last_busy(info->dev);
                 pm_runtime_put_autosuspend(info->dev);
         }
 }
@@ -141,8 +158,8 @@ 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;
+        unsigned int val, lvl;
+        int ret, i;
 
         mutex_lock(&info->lock);
 
@@ -219,13 +236,22 @@ static irqreturn_t arizona_micdet(int irq, void *data)
 
         /*
          * 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.
+         * got a headphone.  Otherwise it's a button press.
          */
         if (val & 0x3fc) {
                 if (info->mic) {
                         dev_dbg(arizona->dev, "Mic button detected\n");
 
+                        lvl = val & ARIZONA_MICD_LVL_MASK;
+                        lvl >>= ARIZONA_MICD_LVL_SHIFT;
+
+                        for (i = 0; i < ARIZONA_NUM_BUTTONS; i++)
+                                if (lvl & arizona_lvl_to_key[i].status)
+                                        input_report_key(info->input,
+                                                         arizona_lvl_to_key[i].report,
+                                                         1);
+                        input_sync(info->input);
+
                 } else if (info->detecting) {
                         dev_dbg(arizona->dev, "Headphone detected\n");
                         info->detecting = false;
@@ -244,6 +270,10 @@ static irqreturn_t arizona_micdet(int irq, void *data)
                 }
         } else {
                 dev_dbg(arizona->dev, "Mic button released\n");
+                for (i = 0; i < ARIZONA_NUM_BUTTONS; i++)
+                        input_report_key(info->input,
+                                         arizona_lvl_to_key[i].report, 0);
+                input_sync(info->input);
         }
 
 handled:
@@ -258,7 +288,7 @@ 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;
+        int ret, i;
 
         pm_runtime_get_sync(info->dev);
 
@@ -288,6 +318,11 @@ static irqreturn_t arizona_jackdet(int irq, void *data)
 
                 arizona_stop_mic(info);
 
+                for (i = 0; i < ARIZONA_NUM_BUTTONS; i++)
+                        input_report_key(info->input,
+                                         arizona_lvl_to_key[i].report, 0);
+                input_sync(info->input);
+
                 ret = extcon_update_state(&info->edev, 0xffffffff, 0);
                 if (ret != 0)
                         dev_err(arizona->dev, "Removal report failed: %d\n",
@@ -307,13 +342,13 @@ 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;
+        int ret, mode, i;
 
         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");
+                dev_err(&pdev->dev, "Failed to allocate memory\n");
                 ret = -ENOMEM;
                 goto err;
         }
@@ -350,7 +385,7 @@ static int __devinit arizona_extcon_probe(struct platform_device *pdev)
 
         ret = extcon_dev_register(&info->edev, arizona->dev);
         if (ret < 0) {
-                dev_err(arizona->dev, "extcon_dev_regster() failed: %d\n",
+                dev_err(arizona->dev, "extcon_dev_register() failed: %d\n",
                         ret);
                 goto err;
         }
@@ -382,6 +417,20 @@ static int __devinit arizona_extcon_probe(struct platform_device *pdev)
 
         arizona_extcon_set_mode(info, 0);
 
+        info->input = input_allocate_device();
+        if (!info->input) {
+                dev_err(arizona->dev, "Can't allocate input dev\n");
+                ret = -ENOMEM;
+                goto err_register;
+        }
+
+        for (i = 0; i < ARIZONA_NUM_BUTTONS; i++)
+                input_set_capability(info->input, EV_KEY,
+                                     arizona_lvl_to_key[i].report);
+        info->input->name = "Headset";
+        info->input->phys = "arizona/extcon";
+        info->input->dev.parent = &pdev->dev;
+
         pm_runtime_enable(&pdev->dev);
         pm_runtime_idle(&pdev->dev);
         pm_runtime_get_sync(&pdev->dev);
@@ -391,7 +440,7 @@ static int __devinit arizona_extcon_probe(struct platform_device *pdev)
         if (ret != 0) {
                 dev_err(&pdev->dev, "Failed to get JACKDET rise IRQ: %d\n",
                         ret);
-                goto err_register;
+                goto err_input;
         }
 
         ret = arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_RISE, 1);
@@ -441,8 +490,16 @@ static int __devinit arizona_extcon_probe(struct platform_device *pdev)
 
         pm_runtime_put(&pdev->dev);
 
+        ret = input_register_device(info->input);
+        if (ret) {
+                dev_err(&pdev->dev, "Can't register input device: %d\n", ret);
+                goto err_micdet;
+        }
+
         return 0;
 
+err_micdet:
+        arizona_free_irq(arizona, ARIZONA_IRQ_MICDET, info);
 err_fall_wake:
         arizona_set_irq_wake(arizona, ARIZONA_IRQ_JD_FALL, 0);
 err_fall:
@@ -451,6 +508,8 @@ 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_input:
+        input_free_device(info->input);
 err_register:
         pm_runtime_disable(&pdev->dev);
         extcon_dev_unregister(&info->edev);
@@ -473,6 +532,7 @@ static int __devexit arizona_extcon_remove(struct platform_device *pdev)
         regmap_update_bits(arizona->regmap, ARIZONA_JACK_DETECT_ANALOGUE,
                            ARIZONA_JD1_ENA, 0);
         arizona_clk32k_disable(arizona);
+        input_unregister_device(info->input);
         extcon_dev_unregister(&info->edev);
 
         return 0;
diff --git a/drivers/extcon/extcon_class.c b/drivers/extcon/extcon-class.c
index f6419f9db76..946a3188b2b 100644
--- a/drivers/extcon/extcon_class.c
+++ b/drivers/extcon/extcon-class.c
@@ -30,6 +30,7 @@
 #include <linux/err.h>
 #include <linux/extcon.h>
 #include <linux/slab.h>
+#include <linux/sysfs.h>
 
 /*
  * extcon_cable_name suggests the standard cable names for commonly used
@@ -442,7 +443,7 @@ static int _call_per_cable(struct notifier_block *nb, unsigned long val,
 
 /**
  * extcon_register_interest() - Register a notifier for a state change of a
- *                            specific cable, not a entier set of cables of a
+ *                            specific cable, not an entier set of cables of a
  *                            extcon device.
  * @obj:        an empty extcon_specific_cable_nb object to be returned.
  * @extcon_name:        the name of extcon device.
@@ -498,7 +499,7 @@ int extcon_unregister_interest(struct extcon_specific_cable_nb *obj)
 }
 
 /**
- * extcon_register_notifier() - Register a notifee to get notified by
+ * extcon_register_notifier() - Register a notifiee to get notified by
  *                            any attach status changes from the extcon.
  * @edev:       the extcon device.
  * @nb:         a notifier block to be registered.
@@ -515,7 +516,7 @@ int extcon_register_notifier(struct extcon_dev *edev,
 EXPORT_SYMBOL_GPL(extcon_register_notifier);
 
 /**
- * extcon_unregister_notifier() - Unregister a notifee from the extcon device.
+ * extcon_unregister_notifier() - Unregister a notifiee from the extcon device.
  * @edev:       the extcon device.
  * @nb:         a registered notifier block to be unregistered.
  */
@@ -673,10 +674,12 @@ int extcon_dev_register(struct extcon_dev *edev, struct device *dev)
                         cable->attr_g.name = str;
                         cable->attr_g.attrs = cable->attrs;
 
+                        sysfs_attr_init(&cable->attr_name.attr);
                         cable->attr_name.attr.name = "name";
                         cable->attr_name.attr.mode = 0444;
                         cable->attr_name.show = cable_name_show;
 
+                        sysfs_attr_init(&cable->attr_state.attr);
                         cable->attr_state.attr.name = "state";
                         cable->attr_state.attr.mode = 0644;
                         cable->attr_state.show = cable_state_show;
@@ -722,6 +725,7 @@ int extcon_dev_register(struct extcon_dev *edev, struct device *dev)
                                 goto err_muex;
                         }
                         strcpy(name, buf);
+                        sysfs_attr_init(&edev->d_attrs_muex[index].attr);
                         edev->d_attrs_muex[index].attr.name = name;
                         edev->d_attrs_muex[index].attr.mode = 0000;
                         edev->attrs_muex[index] = &edev->d_attrs_muex[index]
@@ -802,7 +806,7 @@ EXPORT_SYMBOL_GPL(extcon_dev_register);
 
 /**
  * extcon_dev_unregister() - Unregister the extcon device.
- * @edev:       the extcon device instance to be unregitered.
+ * @edev:       the extcon device instance to be unregistered.
  *
  * Note that this does not call kfree(edev) because edev was not allocated
  * by this class.
diff --git a/drivers/extcon/extcon_gpio.c b/drivers/extcon/extcon-gpio.c
index 3cc152e690b..3cc152e690b 100644
--- a/drivers/extcon/extcon_gpio.c
+++ b/drivers/extcon/extcon-gpio.c
diff --git a/drivers/extcon/extcon-max77693.c b/drivers/extcon/extcon-max77693.c
index 38f9e52f358..e21387e2da5 100644
--- a/drivers/extcon/extcon-max77693.c
+++ b/drivers/extcon/extcon-max77693.c
@@ -356,7 +356,7 @@ static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info,
                 extcon_set_cable_state(info->edev, "MHL", attached);
                 break;
         default:
-                dev_err(info->dev, "faild to detect %s accessory\n",
+                dev_err(info->dev, "failed to detect %s accessory\n",
                         attached ? "attached" : "detached");
                 dev_err(info->dev, "- adc:0x%x, adclow:0x%x, adc1k:0x%x\n",
                         adc, adclow, adc1k);
@@ -548,7 +548,7 @@ static void max77693_muic_irq_work(struct work_struct *work)
                 curr_adc = info->status[0] & STATUS1_ADC_MASK;
                 curr_adc >>= STATUS1_ADC_SHIFT;
 
-                /* Check accossory state which is either detached or attached */
+                /* Check accessory state which is either detached or attached */
                 if (curr_adc == MAX77693_MUIC_ADC_OPEN)
                         attached = false;
 
@@ -564,7 +564,7 @@ static void max77693_muic_irq_work(struct work_struct *work)
                 curr_chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
                 curr_chg_type >>= STATUS2_CHGTYP_SHIFT;
 
-                /* Check charger accossory state which
+                /* Check charger accessory state which
                    is either detached or attached */
                 if (curr_chg_type == MAX77693_CHARGER_TYPE_NONE)
                         attached = false;
@@ -699,7 +699,7 @@ static int __devinit max77693_muic_probe(struct platform_device *pdev)
 
                 ret = request_threaded_irq(virq, NULL,
                                 max77693_muic_irq_handler,
-                                0, muic_irq->name, info);
+                                IRQF_ONESHOT, muic_irq->name, info);
                 if (ret) {
                         dev_err(&pdev->dev,
                                 "failed: irq request (IRQ: %d,"