diff options
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/misc/Kconfig | 7 | ||||
| -rw-r--r-- | drivers/input/misc/Makefile | 1 | ||||
| -rw-r--r-- | drivers/input/misc/ab8500-accdet.c | 1328 |
3 files changed, 1336 insertions, 0 deletions
diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index 45dc6aa62ba..0901e01ab07 100644 --- a/drivers/input/misc/Kconfig +++ b/drivers/input/misc/Kconfig @@ -22,6 +22,13 @@ config INPUT_88PM860X_ONKEY To compile this driver as a module, choose M here: the module will be called 88pm860x_onkey. +config INPUT_AB8500_ACCDET + bool "AB8500 AV Accessory detection" + depends on AB8500_CORE && AB8500_GPADC && AB8500_GPIO + help + Say Y here to enable AV accessory detection features for ST-Ericsson's + AB8500 Mix-Sig PMIC. + config INPUT_AB8500_PONKEY tristate "AB8500 Pon (PowerOn) Key" depends on AB8500_CORE diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile index 38efb2cb182..c77334ac711 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -5,6 +5,7 @@ # Each configuration option enables a list of files. obj-$(CONFIG_INPUT_88PM860X_ONKEY) += 88pm860x_onkey.o +obj-$(CONFIG_INPUT_AB8500_ACCDET) += ab8500-accdet.o obj-$(CONFIG_INPUT_AB8500_PONKEY) += ab8500-ponkey.o obj-$(CONFIG_INPUT_AD714X) += ad714x.o obj-$(CONFIG_INPUT_AD714X_I2C) += ad714x-i2c.o diff --git a/drivers/input/misc/ab8500-accdet.c b/drivers/input/misc/ab8500-accdet.c new file mode 100644 index 00000000000..8057d0e881a --- /dev/null +++ b/drivers/input/misc/ab8500-accdet.c @@ -0,0 +1,1328 @@ +/* + * Copyright (C) ST-Ericsson SA 2010 + * + * Author: Jarmo K. Kuronen <jarmo.kuronen@symbio.com> + * for ST-Ericsson. + * + * License terms: GPL V2 + * + * 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/module.h> /* Needed by all modules */ +#include <linux/kernel.h> /* Needed for KERN_INFO */ +#include <linux/init.h> /* Needed for the macros */ +#include <linux/workqueue.h> +#include <linux/delay.h> +#include <linux/jiffies.h> +#include <linux/slab.h> +#include <linux/input.h> +#include <sound/soc.h> +#include <sound/jack.h> +#include <linux/platform_device.h> +#include <linux/regulator/consumer.h> +#include <linux/mfd/ab8500.h> +#include <linux/mfd/abx500.h> +#include <linux/mfd/ab8500/gpadc.h> +#include <linux/mfd/ab8500/gpio.h> +#include <linux/gpio.h> +#include <mach/ab8500-accdet.h> +#ifdef CONFIG_SND_SOC_UX500_AB8500 +#include <sound/ux500_ab8500.h> +#else +#define ux500_ab8500_jack_report(i) +#endif + +#define MAX_DET_COUNT 10 +#define MAX_VOLT_DIFF 30 +#define MIN_MIC_POWER -100 + +/* Unique value used to identify Headset button input device */ +#define BTN_INPUT_UNIQUE_VALUE "AB8500HsBtn" +#define BTN_INPUT_DEV_NAME "AB8500 Hs Button" + +#define DEBOUNCE_PLUG_EVENT_MS 100 +#define DEBOUNCE_PLUG_RETEST_MS 25 +#define DEBOUNCE_UNPLUG_EVENT_MS 0 + +/* + * Register definition for accessory detection. + */ +#define AB8500_REGU_CTRL1_SPARE_REG 0x84 +#define AB8500_ACC_DET_DB1_REG 0x80 +#define AB8500_ACC_DET_DB2_REG 0x81 +#define AB8500_ACC_DET_CTRL_REG 0x82 +#define AB8500_IT_SOURCE5_REG 0x04 + +/* REGISTER: AB8500_ACC_DET_CTRL_REG */ +#define BITS_ACCDETCTRL2_ENA (0x20 | 0x10 | 0x08) +#define BITS_ACCDETCTRL1_ENA (0x02 | 0x01) + +/* REGISTER: AB8500_REGU_CTRL1_SPARE_REG */ +#define BIT_REGUCTRL1SPARE_VAMIC1_GROUND 0x01 + +/* REGISTER: AB8500_IT_SOURCE5_REG */ +#define BIT_ITSOURCE5_ACCDET1 0x04 + +/* After being loaded, how fast the first check is to be made */ +#define INIT_DELAY_MS 3000 + +/* Voltage limits (mV) for various types of AV Accessories */ +#define ACCESSORY_DET_VOL_DONTCARE -1 +#define ACCESSORY_HEADPHONE_DET_VOL_MIN 0 +#define ACCESSORY_HEADPHONE_DET_VOL_MAX 40 +#define ACCESSORY_CVIDEO_DET_VOL_MIN 41 +#define ACCESSORY_CVIDEO_DET_VOL_MAX 105 +#define ACCESSORY_CARKIT_DET_VOL_MIN 1100 +#define ACCESSORY_CARKIT_DET_VOL_MAX 1300 +#define ACCESSORY_HEADSET_DET_VOL_MIN 0 +#define ACCESSORY_HEADSET_DET_VOL_MAX 200 +#define ACCESSORY_OPENCABLE_DET_VOL_MIN 1730 +#define ACCESSORY_OPENCABLE_DET_VOL_MAX 2150 + +/* Macros */ + +/* + * Conviniency macros to check jack characteristics. + */ +#define jack_supports_mic(type) \ + (type == JACK_TYPE_HEADSET || type == JACK_TYPE_CARKIT) +#define jack_supports_spkr(type) \ + ((type != JACK_TYPE_DISCONNECTED) && (type != JACK_TYPE_CONNECTED)) +#define jack_supports_buttons(type) \ + ((type == JACK_TYPE_HEADSET) ||\ + (type == JACK_TYPE_CARKIT) ||\ + (type == JACK_TYPE_OPENCABLE) ||\ + (type == JACK_TYPE_CONNECTED)) + + +/* Enumerations */ + +/** + * @JACK_TYPE_UNSPECIFIED Not known whether any accessories are connected. + * @JACK_TYPE_DISCONNECTED No accessories connected. + * @JACK_TYPE_CONNECTED Accessory is connected but functionality was unable to + * detect the actual type. In this mode, possible button events are reported. + * @JACK_TYPE_HEADPHONE Headphone type of accessory (spkrs only) connected + * @JACK_TYPE_HEADSET Headset type of accessory (mic+spkrs) connected + * @JACK_TYPE_CARKIT Carkit type of accessory connected + * @JACK_TYPE_OPENCABLE Open cable connected + * @JACK_TYPE_CVIDEO CVideo type of accessory connected. + */ +enum accessory_jack_type { + JACK_TYPE_UNSPECIFIED, + JACK_TYPE_DISCONNECTED, + JACK_TYPE_CONNECTED, + JACK_TYPE_HEADPHONE, + JACK_TYPE_HEADSET, + JACK_TYPE_CARKIT, + JACK_TYPE_OPENCABLE, + JACK_TYPE_CVIDEO +}; + +/** + * @BUTTON_UNK Button state not known + * @BUTTON_PRESSED Button "down" + * @BUTTON_RELEASED Button "up" + */ +enum accessory_button_state { + BUTTON_UNK, + BUTTON_PRESSED, + BUTTON_RELEASED +}; + +/** + * @PLUG_IRQ Interrupt gen. when accessory plugged in + * @UNPLUG_IRQ Interrupt gen. when accessory plugged out + * @BUTTON_PRESS_IRQ Interrupt gen. when accessory button pressed. + * @BUTTON_RELEASE_IRQ Interrupt gen. when accessory button released. + */ +enum accessory_irq { + PLUG_IRQ, + UNPLUG_IRQ, + BUTTON_PRESS_IRQ, + BUTTON_RELEASE_IRQ +}; + +/** + * Enumerates the op. modes of the avcontrol switch + * @AUDIO_IN Audio input is selected + * @VIDEO_OUT Video output is selected + */ +enum accessory_avcontrol_dir { + AUDIO_IN, + VIDEO_OUT, +}; + +/** + * @REGULATOR_VAUDIO v-audio regulator + * @REGULATOR_VAMIC1 v-amic1 regulator + * @REGULATOR_AVSWITCH Audio/Video select switch regulator + * @REGULATOR_ALL All regulators combined + */ +enum accessory_regulator { + REGULATOR_NONE = 0x0, + REGULATOR_VAUDIO = 0x1, + REGULATOR_VAMIC1 = 0x2, + REGULATOR_AVSWITCH = 0x4, + REGULATOR_ALL = 0xFF +}; + +/* Structures */ + +/** + * Describes an interrupt + * @irq interrupt identifier + * @name name of the irq in platform data + * @isr interrupt service routine + * @register are we currently registered to receive interrupts from this source. + */ +struct accessory_irq_descriptor { + enum accessory_irq irq; + const char *name; + irq_handler_t isr; + int registered; +}; + +/** + * Encapsulates info of single regulator. + * @id regulator identifier + * @name name of the regulator + * @enabled flag indicating whether regu is currently enabled. + * @handle regulator handle + */ +struct accessory_regu_descriptor { + enum accessory_regulator id; + const char *name; + int enabled; + struct regulator *handle; +}; + +/** + * Defines attributes for accessory detection operation. + * @typename type as string + * @type Type of accessory this task tests + * @req_det_count How many times this particular type of accessory + * needs to be detected in sequence in order to accept. Multidetection + * implemented to avoid false detections during plug-in. + * @meas_mv Should ACCDETECT2 input voltage be measured just before + * making the decision or can cached voltage be used instead. + * @minvol minimum voltage (mV) for decision + * @maxvol maximum voltage (mV) for decision + */ +struct accessory_detect_task { + const char *typename; + enum accessory_jack_type type; + int req_det_count; + int meas_mv; + int minvol; + int maxvol; +}; + +/** + * Device data, capsulates all relevant device data structures. + * + * @pdev pointer to platform device + * @pdata Platform data + * @gpadc interface for ADC data + * @irq_work_queue Work queue for deferred interrupt processing + * + * @detect_work work item to perform detection work + * @unplug_irq_work work item to process unplug event + * @init_work work item to process initialization work. + * + * @btn_input_dev button input device used to report btn presses + * @btn_state Current state of accessory button + * + * @jack_type type of currently connected accessory + * @reported_jack_type previously reported jack type. + * @jack_type_temp temporary storage for currently connected accessory + * + * @jack_det_count counter how many times in sequence the accessory + * type detection has produced same result. + * @total_jack_det_count after plug-in irq, how many times detection + * has totally been made in order to detect the accessory type + * + * @detect_jiffies Used to save timestamp when detection was made. Timestamp + * used to filter out spurious button presses that might occur during the + * plug-in procedure. + * + * @accdet1_th_set flag to indicate whether accdet1 threshold and debounce + * times are configured + * @accdet2_th_set flag to indicate whether accdet2 thresholds are configured + * @gpio35_dir_set flag to indicate whether GPIO35 (VIDEOCTRL) direction + * has been configured. + */ +struct ab8500_ad { + struct platform_device *pdev; + struct ab8500_accdet_platform_data *pdata; + struct ab8500_gpadc *gpadc; + struct workqueue_struct *irq_work_queue; + + struct delayed_work detect_work; + struct delayed_work unplug_irq_work; + struct delayed_work init_work; + + struct input_dev *btn_input_dev; + enum accessory_button_state btn_state; + + enum accessory_jack_type jack_type; + enum accessory_jack_type reported_jack_type; + enum accessory_jack_type jack_type_temp; + + int jack_det_count; + int total_jack_det_count; + + unsigned long detect_jiffies; + + int accdet1_th_set; + int accdet2_th_set; + int gpio35_dir_set; +}; + +/* Forward declarations */ + +static void config_accdetect(struct ab8500_ad *dd); + +static void release_irq(struct ab8500_ad *dd, enum accessory_irq irq_id); +static void claim_irq(struct ab8500_ad *dd, enum accessory_irq irq_id); + +static irqreturn_t unplug_irq_handler(int irq, void *_userdata); +static irqreturn_t plug_irq_handler(int irq, void *_userdata); +static irqreturn_t button_press_irq_handler(int irq, void *_userdata); +static irqreturn_t button_release_irq_handler(int irq, void *_userdata); + +static void unplug_irq_handler_work(struct work_struct *work); +static void detect_work(struct work_struct *work); +static void init_work(struct work_struct *work); + +static enum accessory_jack_type detect(struct ab8500_ad *dd, int *required_det); +static void set_av_switch(struct ab8500_ad *dd, + enum accessory_avcontrol_dir dir); + +/* Static data initialization */ + +static struct accessory_detect_task detect_ops[] = { + { + .type = JACK_TYPE_DISCONNECTED, + .typename = "DISCONNECTED", + .meas_mv = 1, + .req_det_count = 1, + .minvol = ACCESSORY_DET_VOL_DONTCARE, + .maxvol = ACCESSORY_DET_VOL_DONTCARE + }, + { + .type = JACK_TYPE_HEADPHONE, + .typename = "HEADPHONE", + .meas_mv = 1, + .req_det_count = 1, + .minvol = ACCESSORY_HEADPHONE_DET_VOL_MIN, + .maxvol = ACCESSORY_HEADPHONE_DET_VOL_MAX + }, + { + .type = JACK_TYPE_CVIDEO, + .typename = "CVIDEO", + .meas_mv = 0, + .req_det_count = 4, + .minvol = ACCESSORY_CVIDEO_DET_VOL_MIN, + .maxvol = ACCESSORY_CVIDEO_DET_VOL_MAX + }, + { + .type = JACK_TYPE_OPENCABLE, + .typename = "OPENCABLE", + .meas_mv = 0, + .req_det_count = 4, + .minvol = ACCESSORY_OPENCABLE_DET_VOL_MIN, + .maxvol = ACCESSORY_OPENCABLE_DET_VOL_MAX + }, + { + .type = JACK_TYPE_CARKIT, + .typename = "CARKIT", + .meas_mv = 1, + .req_det_count = 1, + .minvol = ACCESSORY_CARKIT_DET_VOL_MIN, + .maxvol = ACCESSORY_CARKIT_DET_VOL_MAX + }, + { + .type = JACK_TYPE_HEADSET, + .typename = "HEADSET", + .meas_mv = 0, + .req_det_count = 2, + .minvol = ACCESSORY_HEADSET_DET_VOL_MIN, + .maxvol = ACCESSORY_HEADSET_DET_VOL_MAX + }, + { + .type = JACK_TYPE_CONNECTED, + .typename = "CONNECTED", + .meas_mv = 0, + .req_det_count = 4, + .minvol = ACCESSORY_DET_VOL_DONTCARE, + .maxvol = ACCESSORY_DET_VOL_DONTCARE + } +}; + +static struct accessory_regu_descriptor regu_desc[3] = { + { + .id = REGULATOR_VAUDIO, + .name = "v-audio", + }, + { + .id = REGULATOR_VAMIC1, + .name = "v-amic1", + }, + { + .id = REGULATOR_AVSWITCH, + .name = "vcc-avswitch", + }, +}; + +static struct accessory_irq_descriptor irq_desc[] = { + { + .irq = PLUG_IRQ, + .name = "ACC_DETECT_1DB_F", + .isr = plug_irq_handler, + }, + { + .irq = UNPLUG_IRQ, + .name = "ACC_DETECT_1DB_R", + .isr = unplug_irq_handler, + }, + { + .irq = BUTTON_PRESS_IRQ, + .name = "ACC_DETECT_22DB_F", + .isr = button_press_irq_handler, + }, + { + .irq = BUTTON_RELEASE_IRQ, + .name = "ACC_DETECT_22DB_R", + .isr = button_release_irq_handler, + }, +}; + +/* + * textual represenation of the accessory type + */ +static const char *accessory_str(enum accessory_jack_type type) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(detect_ops); i++) + if (type == detect_ops[i].type) + return detect_ops[i].typename; + + return "UNKNOWN?"; +} + +/* + * enables regulator but only if it has not been enabled earlier. + */ +static void accessory_regulator_enable(enum accessory_regulator reg) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(regu_desc); i++) { + if (reg & regu_desc[i].id) { + if (!regu_desc[i].enabled) { + if (!regulator_enable(regu_desc[i].handle)) + regu_desc[i].enabled = 1; + } + } + } +} + +/* + * disables regulator but only if it has been previously enabled. + */ +static void accessory_regulator_disable(enum accessory_regulator reg) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(regu_desc); i++) { + if (reg & regu_desc[i].id) { + if (regu_desc[i].enabled) { + if (!regulator_disable(regu_desc[i].handle)) + regu_desc[i].enabled = 0; + } + } + } +} + +/* + * frees previously retrieved regulators. + */ +static void free_regulators(void) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(regu_desc); i++) { + if (regu_desc[i].handle) { + regulator_put(regu_desc[i].handle); + regu_desc[i].handle = NULL; + } + } +} + +/* + * gets required regulators. + */ +static int create_regulators(struct ab8500_ad *dd) +{ + int i; + int status = 0; + + for (i = 0; i < ARRAY_SIZE(regu_desc); i++) { + struct regulator *regu = + regulator_get(&dd->pdev->dev, regu_desc[i].name); + if (IS_ERR(regu)) { + status = PTR_ERR(regu); + dev_err(&dd->pdev->dev, + "%s: Failed to get supply '%s' (%d).\n", + __func__, regu_desc[i].name, status); + free_regulators(); + goto out; + } else { + regu_desc[i].handle = regu; + } + } + +out: + return status; +} + +/* + * configures accdet2 input on/off + */ +static void config_accdetect2_hw(struct ab8500_ad *dd, int enable) +{ + int ret = 0; + + if (!dd->accdet2_th_set) { + /* Configure accdetect21+22 thresholds */ + ret = abx500_set_register_interruptible(&dd->pdev->dev, + AB8500_ECI_AV_ACC, + AB8500_ACC_DET_DB2_REG, + dd->pdata->accdet2122_th); + if (ret < 0) { + dev_err(&dd->pdev->dev, + "%s: Failed to write reg (%d).\n", __func__, + ret); + goto out; + } else { + dd->accdet2_th_set = 1; + } + } + + /* Enable/Disable accdetect21 comparators + pullup */ + ret = abx500_mask_and_set_register_interruptible( + &dd->pdev->dev, + AB8500_ECI_AV_ACC, + AB8500_ACC_DET_CTRL_REG, + BITS_ACCDETCTRL2_ENA, + enable ? BITS_ACCDETCTRL2_ENA : 0); + + if (ret < 0) + dev_err(&dd->pdev->dev, "%s: Failed to update reg (%d).\n", + __func__, ret); + +out: + return; +} + +/* + * configures accdet1 input on/off + */ +void config_accdetect1_hw(struct ab8500_ad *dd, int enable) +{ + int ret; + + if (!dd->accdet1_th_set) { + ret = abx500_set_register_interruptible(&dd->pdev->dev, + AB8500_ECI_AV_ACC, + AB8500_ACC_DET_DB1_REG, + dd->pdata->accdet1_dbth); + if (ret < 0) + dev_err(&dd->pdev->dev, + "%s: Failed to write reg (%d).\n", __func__, + ret); + else + dd->accdet1_th_set = 1; + } + + /* enable accdetect1 comparator */ + ret = abx500_mask_and_set_register_interruptible( + &dd->pdev->dev, + AB8500_ECI_AV_ACC, + AB8500_ACC_DET_CTRL_REG, + BITS_ACCDETCTRL1_ENA, + enable ? BITS_ACCDETCTRL1_ENA : 0); + + if (ret < 0) + dev_err(&dd->pdev->dev, + "%s: Failed to update reg (%d).\n", __func__, ret); +} + +/* + * create input device for button press reporting + */ +static int create_btn_input_dev(struct ab8500_ad *dd) +{ + int err; + + dd->btn_input_dev = input_allocate_device(); + if (!dd->btn_input_dev) { + dev_err(&dd->pdev->dev, "%s: Failed to allocate input dev.\n", + __func__); + err = -ENOMEM; + goto out; + } + + input_set_capability(dd->btn_input_dev, + EV_KEY, + dd->pdata->btn_keycode); + + dd->btn_input_dev->name = BTN_INPUT_DEV_NAME; + dd->btn_input_dev->uniq = BTN_INPUT_UNIQUE_VALUE; + dd->btn_input_dev->dev.parent = &dd->pdev->dev; + + err = input_register_device(dd->btn_input_dev); + if (err) { + dev_err(&dd->pdev->dev, + "%s: register_input_device failed (%d).\n", __func__, + err); + input_free_device(dd->btn_input_dev); + dd->btn_input_dev = NULL; + goto out; + } +out: + return err; +} + +/* + * reports jack status + */ +void report_jack_status(struct ab8500_ad *dd) +{ + int value = 0; + + /* Never report possible open cable */ + if (dd->jack_type == JACK_TYPE_OPENCABLE) + goto out; + + /* Never report same state twice in a row */ + if (dd->jack_type == dd->reported_jack_type) + goto out; + dd->reported_jack_type = dd->jack_type; + + dev_info(&dd->pdev->dev, "Accessory: %s\n", + accessory_str(dd->jack_type)); + + if (dd->jack_type != JACK_TYPE_DISCONNECTED && + dd->jack_type != JACK_TYPE_UNSPECIFIED) + value |= SND_JACK_MECHANICAL; + if (jack_supports_mic(dd->jack_type)) + value |= SND_JACK_MICROPHONE; + if (jack_supports_spkr(dd->jack_type)) + value |= (SND_JACK_HEADPHONE | SND_JACK_LINEOUT); + if (dd->jack_type == JACK_TYPE_CVIDEO) { + value |= SND_JACK_VIDEOOUT; + set_av_switch(dd, VIDEO_OUT); + } + + ux500_ab8500_jack_report(value); + +out: return; +} + +/* + * returns the high level status whether some accessory is connected (1|0). + */ +static int detect_plugged_in(struct ab8500_ad *dd) +{ + u8 value = 0; + int status = abx500_get_register_interruptible( + &dd->pdev->dev, + AB8500_INTERRUPT, + AB8500_IT_SOURCE5_REG, + &value); + if (status < 0) { + dev_err(&dd->pdev->dev, "%s: reg read failed (%d).\n", + __func__, status); + return 0; + } + + return value & BIT_ITSOURCE5_ACCDET1 ? 0 : 1; +} + +/* + * mic_line_voltage_stable - measures a relative stable voltage from spec. input + */ +static int meas_voltage_stable(struct ab8500_ad *dd, u8 input) +{ + int iterations = 2; + int v1, v2, dv; + + v1 = ab8500_gpadc_convert(dd->gpadc, input); + do { + msleep(1); + --iterations; + v2 = ab8500_gpadc_convert(dd->gpadc, input); + dv = abs(v2 - v1); + v1 = v2; + } while (iterations > 0 && dv > MAX_VOLT_DIFF); + + return v1; +} + +/* + * worker routine to handle accessory unplug case + */ +static void unplug_irq_handler_work(struct work_struct *work) +{ + struct ab8500_ad *dd = container_of(work, + struct ab8500_ad, unplug_irq_work.work); + + dev_dbg(&dd->pdev->dev, "%s: Enter\n", __func__); + + dd->jack_type = dd->jack_type_temp = JACK_TYPE_DISCONNECTED; + dd->jack_det_count = dd->total_jack_det_count = 0; + dd->btn_state = BUTTON_UNK; + config_accdetect(dd); + + set_av_switch(dd, AUDIO_IN); + + accessory_regulator_disable(REGULATOR_ALL); + + report_jack_status(dd); +} + +/* + * interrupt service routine for accessory unplug. + */ +static irqreturn_t unplug_irq_handler(int irq, void *_userdata) +{ + struct ab8500_ad *dd = _userdata; + + dev_dbg(&dd->pdev->dev, "%s: Enter (irq=%d)\n", __func__, irq); + + queue_delayed_work(dd->irq_work_queue, &dd->unplug_irq_work, + msecs_to_jiffies(DEBOUNCE_UNPLUG_EVENT_MS)); + + return IRQ_HANDLED; +} + +/* + * interrupt service routine for accessory plug. + */ +static irqreturn_t plug_irq_handler(int irq, void *_userdata) +{ + struct ab8500_ad *dd = _userdata; + + dev_dbg(&dd->pdev->dev, "%s: Enter (irq=%d)\n", + __func__, irq); + + switch (dd->jack_type) { + case JACK_TYPE_DISCONNECTED: + case JACK_TYPE_UNSPECIFIED: + queue_delayed_work(dd->irq_work_queue, &dd->detect_work, + msecs_to_jiffies(DEBOUNCE_PLUG_EVENT_MS)); + break; + + default: + dev_err(&dd->pdev->dev, "%s: Unexpected plug IRQ\n", __func__); + break; + } + + return IRQ_HANDLED; +} + +/* + * worker routine to perform detection. + */ +static void detect_work(struct work_struct *work) +{ + int req_det_count = 1; + enum accessory_jack_type new_type; + struct ab8500_ad *dd = container_of(work, + struct ab8500_ad, detect_work.work); + + dev_dbg(&dd->pdev->dev, "%s: Enter\n", __func__); + + new_type = detect(dd, &req_det_count); + + dd->total_jack_det_count++; + if (dd->jack_type_temp == new_type) { + dd->jack_det_count++; + } else { + dd->jack_det_count = 1; + dd->jack_type_temp = new_type; + } + + if (dd->total_jack_det_count >= MAX_DET_COUNT) { + dev_err(&dd->pdev->dev, + "%s: MAX_DET_COUNT(=%d) reached. Bailing out.\n", + __func__, MAX_DET_COUNT); + queue_delayed_work(dd->irq_work_queue, &dd->unplug_irq_work, + msecs_to_jiffies(DEBOUNCE_UNPLUG_EVENT_MS)); + } else if (dd->jack_det_count >= req_det_count) { + dd->total_jack_det_count = dd->jack_det_count = 0; + dd->jack_type = new_type; + dd->detect_jiffies = jiffies; + report_jack_status(dd); + config_accdetect(dd); + } else { + queue_delayed_work(dd->irq_work_queue, + &dd->detect_work, + msecs_to_jiffies(DEBOUNCE_PLUG_RETEST_MS)); + } +} + +/* + * reports a button event (pressed, released). + */ +static void report_btn_event(struct ab8500_ad *dd, int down) +{ + input_report_key(dd->btn_input_dev, dd->pdata->btn_keycode, down); + input_sync(dd->btn_input_dev); + + dev_dbg(&dd->pdev->dev, "HS-BTN: %s\n", down ? "PRESSED" : "RELEASED"); +} + +/* + * interrupt service routine invoked when hs button is pressed down. + */ +static irqreturn_t button_press_irq_handler(int irq, void *_userdata) +{ + struct ab8500_ad *dd = _userdata; + + unsigned long accept_jiffies = dd->detect_jiffies + + msecs_to_jiffies(1000); + if (time_before(jiffies, accept_jiffies)) { + dev_dbg(&dd->pdev->dev, "%s: Skipped spurious btn press.\n", + __func__); + return IRQ_HANDLED; + } + + dev_dbg(&dd->pdev->dev, "%s: Enter (irq=%d)\n", __func__, irq); + + if (dd->jack_type == JACK_TYPE_OPENCABLE) { + /* Someting got connected to open cable -> detect.. */ + config_accdetect2_hw(dd, 0); + queue_delayed_work(dd->irq_work_queue, &dd->detect_work, + msecs_to_jiffies(DEBOUNCE_PLUG_EVENT_MS)); + return IRQ_HANDLED; + } + + if (dd->btn_state == BUTTON_PRESSED) + return IRQ_HANDLED; + + if (jack_supports_buttons(dd->jack_type)) { + dd->btn_state = BUTTON_PRESSED; + report_btn_event(dd, 1); + } else { + dd->btn_state = BUTTON_UNK; + } + + return IRQ_HANDLED; +} + +/* + * interrupts service routine invoked when hs button is released. + */ +static irqreturn_t button_release_irq_handler(int irq, void *_userdata) +{ + struct ab8500_ad *dd = _userdata; + + dev_dbg(&dd->pdev->dev, "%s: Enter (irq=%d)\n", __func__, irq); + + if (dd->jack_type == JACK_TYPE_OPENCABLE) + return IRQ_HANDLED; + + if (dd->btn_state != BUTTON_PRESSED) + return IRQ_HANDLED; + + if (jack_supports_buttons(dd->jack_type)) { + report_btn_event(dd, 0); + dd->btn_state = BUTTON_RELEASED; + } else { + dd->btn_state = BUTTON_UNK; + } + + return IRQ_HANDLED; +} + +/* + * configures HW so that it is possible to make decision whether + * accessory is connected or not. + */ +static void config_hw_test_plug_connected(struct ab8500_ad *dd, int enable) +{ + int ret; + + dev_dbg(&dd->pdev->dev, "%s:%d\n", __func__, enable); + + ret = ab8500_config_pull_up_or_down(dd->pdev, + dd->pdata->video_ctrl_gpio, !enable); + if (ret < 0) { + dev_err(&dd->pdev->dev, + "%s: Failed to update reg (%d).\n", __func__, ret); + return; + } + + if (enable) + accessory_regulator_enable(REGULATOR_VAMIC1); +} + +/* + * configures HW so that carkit/headset detection can be accomplished. + */ +static void config_hw_test_basic_carkit(struct ab8500_ad *dd, int enable) +{ + int ret; + + dev_dbg(&dd->pdev->dev, "%s:%d\n", __func__, enable); + + if (enable) + accessory_regulator_disable(REGULATOR_VAMIC1); + + /* Un-Ground the VAMic1 output when enabled */ + ret = abx500_mask_and_set_register_interruptible( + &dd->pdev->dev, + AB8500_REGU_CTRL1, + AB8500_REGU_CTRL1_SPARE_REG, + BIT_REGUCTRL1SPARE_VAMIC1_GROUND, + enable ? BIT_REGUCTRL1SPARE_VAMIC1_GROUND : 0); + if (ret < 0) + dev_err(&dd->pdev->dev, + "%s: Failed to update reg (%d).\n", __func__, ret); +} + +/* + * checks whether measured voltage is in given range. depending on arguments, + * voltage might be re-measured or previously measured voltage is reused. + */ +static int mic_vol_in_range(struct ab8500_ad *dd, + int lo, int hi, int force_read) +{ + static int mv = MIN_MIC_POWER; + + if (mv == -100 || force_read) + mv = meas_voltage_stable(dd, ACC_DETECT2); + + return (mv >= lo && mv <= hi) ? 1 : 0; +} + +/* + * checks whether the currently connected HW is of given type. + */ +static int detect_hw(struct ab8500_ad *dd, + struct accessory_detect_task *task) +{ + int status; + + switch (task->type) { + case JACK_TYPE_DISCONNECTED: + config_hw_test_plug_connected(dd, 1); + status = !detect_plugged_in(dd); + break; + case JACK_TYPE_CONNECTED: + config_hw_test_plug_connected(dd, 1); + status = detect_plugged_in(dd); + break; + case JACK_TYPE_CARKIT: + config_hw_test_basic_carkit(dd, 1); + /* flow through.. */ + case JACK_TYPE_HEADPHONE: + case JACK_TYPE_CVIDEO: + case JACK_TYPE_HEADSET: + case JACK_TYPE_OPENCABLE: + status = mic_vol_in_range(dd, + task->minvol, + task->maxvol, + task->meas_mv); + break; + default: + status = 0; + } + + return status; +} + +/* + * sets the av switch direction - audio-in vs video-out + */ +static void set_av_switch(struct ab8500_ad *dd, + enum accessory_avcontrol_dir dir) +{ + int ret; + + dev_dbg(&dd->pdev->dev, "%s: Enter\n", __func__); + if (!dd->gpio35_dir_set) { + ret = gpio_direction_output(dd->pdata->video_ctrl_gpio, + dir == AUDIO_IN ? 1 : 0); + if (ret < 0) { + dev_err(&dd->pdev->dev, + "%s: Output video ctrl signal failed (%d).\n", + __func__, ret); + } else { + dd->gpio35_dir_set = 1; + dev_dbg(&dd->pdev->dev, "AV-SWITCH: %s\n", + dir == AUDIO_IN ? "AUDIO_IN" : "VIDEO_OUT"); + } + } else { + gpio_set_value(dd->pdata->video_ctrl_gpio, + dir == AUDIO_IN ? 1 : 0); + } +} + +/* + * Tries to detect the currently attached accessory + */ +static enum accessory_jack_type detect(struct ab8500_ad *dd, + int *req_det_count) +{ + enum accessory_jack_type type = JACK_TYPE_DISCONNECTED; + int i; + + accessory_regulator_enable(REGULATOR_VAUDIO | REGULATOR_AVSWITCH); + + for (i = 0; i < ARRAY_SIZE(detect_ops); ++i) { + if (detect_hw(dd, &detect_ops[i])) { + type = detect_ops[i].type; + *req_det_count = detect_ops[i].req_det_count; + break; + } + } + + config_hw_test_basic_carkit(dd, 0); + config_hw_test_plug_connected(dd, 0); + + if (jack_supports_buttons(type)) + accessory_regulator_enable(REGULATOR_VAMIC1); + else + accessory_regulator_disable(REGULATOR_VAMIC1 | + REGULATOR_AVSWITCH); + + accessory_regulator_disable(REGULATOR_VAUDIO); + + return type; +} + +/* + * registers to specific interrupt + */ +static void claim_irq(struct ab8500_ad *dd, enum accessory_irq irq_id) +{ + int ret; + int irq; + + if (irq_desc[irq_id].registered) + return; + + irq = platform_get_irq_byname( + dd->pdev, + irq_desc[irq_id].name); + if (irq < 0) { + dev_err(&dd->pdev->dev, + "%s: Failed to get irq %s\n", __func__, + irq_desc[irq_id].name); + return; + } + + ret = request_threaded_irq(irq, + NULL, + irq_desc[irq_id].isr, + IRQF_NO_SUSPEND | IRQF_SHARED, + irq_desc[irq_id].name, + dd); + if (ret != 0) { + dev_err(&dd->pdev->dev, + "%s: Failed to claim irq %s (%d)\n", + __func__, + irq_desc[irq_id].name, + ret); + } else { + irq_desc[irq_id].registered = 1; + dev_dbg(&dd->pdev->dev, "%s: %s\n", + __func__, irq_desc[irq_id].name); + } +} + +/* + * releases specific interrupt + */ +static void release_irq(struct ab8500_ad *dd, enum accessory_irq irq_id) +{ + int irq; + + if (!irq_desc[irq_id].registered) + return; + + irq = platform_get_irq_byname( + dd->pdev, + irq_desc[irq_id].name); + if (irq < 0) { + dev_err(&dd->pdev->dev, + "%s: Failed to get irq %s (%d)\n", + __func__, + irq_desc[irq_id].name, irq); + } else { + free_irq(irq, dd); + irq_desc[irq_id].registered = 0; + dev_dbg(&dd->pdev->dev, "%s: %s\n", + __func__, irq_desc[irq_id].name); + } +} + +/* + * configures interrupts + detection hardware to meet the requirements + * set by currently attached accessory type. + */ +static void config_accdetect(struct ab8500_ad *dd) +{ + switch (dd->jack_type) { + case JACK_TYPE_UNSPECIFIED: + config_accdetect1_hw(dd, 1); + config_accdetect2_hw(dd, 0); + + release_irq(dd, PLUG_IRQ); + release_irq(dd, UNPLUG_IRQ); + release_irq(dd, BUTTON_PRESS_IRQ); + release_irq(dd, BUTTON_RELEASE_IRQ); + break; + + case JACK_TYPE_DISCONNECTED: + case JACK_TYPE_HEADPHONE: + case JACK_TYPE_CVIDEO: + config_accdetect1_hw(dd, 1); + config_accdetect2_hw(dd, 0); + + claim_irq(dd, PLUG_IRQ); + claim_irq(dd, UNPLUG_IRQ); + release_irq(dd, BUTTON_PRESS_IRQ); + release_irq(dd, BUTTON_RELEASE_IRQ); + break; + + case JACK_TYPE_CONNECTED: + case JACK_TYPE_HEADSET: + case JACK_TYPE_CARKIT: + case JACK_TYPE_OPENCABLE: + config_accdetect1_hw(dd, 1); + config_accdetect2_hw(dd, 1); + + release_irq(dd, PLUG_IRQ); + claim_irq(dd, UNPLUG_IRQ); + claim_irq(dd, BUTTON_PRESS_IRQ); + claim_irq(dd, BUTTON_RELEASE_IRQ); + break; + + default: + dev_err(&dd->pdev->dev, "%s: Unknown type: %d\n", + __func__, dd->jack_type); + } +} + +/* + * Deferred initialization of the work. + */ +static void init_work(struct work_struct *work) +{ + struct ab8500_ad *dd = container_of(work, + struct ab8500_ad, init_work.work); + + dev_dbg(&dd->pdev->dev, "%s: Enter\n", __func__); + + set_av_switch(dd, AUDIO_IN); + dd->jack_type = dd->reported_jack_type = JACK_TYPE_UNSPECIFIED; + config_accdetect(dd); + queue_delayed_work(dd->irq_work_queue, + &dd->detect_work, + msecs_to_jiffies(0)); +} + +/* + * performs platform device initialization + */ +int ab8500_accessory_init(struct platform_device *pdev) +{ + struct ab8500_ad *dd; + struct ab8500_platform_data *plat; + + dev_dbg(&pdev->dev, "Enter: %s\n", __func__); + + dd = kzalloc(sizeof(struct ab8500_ad), GFP_KERNEL); + if (!dd) { + dev_err(&pdev->dev, "%s: Mem. alloc failed\n", __func__); + goto fail_no_mem_for_devdata; + } + + dd->pdev = pdev; + dd->pdata = pdev->dev.platform_data; + plat = dev_get_platdata(pdev->dev.parent); + + if (!plat || !plat->accdet) { + dev_err(&pdev->dev, "%s: Failed to get accdet plat data.\n", + __func__); + goto fail_no_ab8500_dev; + } + dd->pdata = plat->accdet; + + if (dd->pdata->video_ctrl_gpio) { + if (!gpio_is_valid(dd->pdata->video_ctrl_gpio)) { + dev_err(&pdev->dev, + "%s: Video ctrl GPIO invalid (%d).\n", __func__, + dd->pdata->video_ctrl_gpio); + goto fail_video_ctrl_gpio; + } + if (gpio_request(dd->pdata->video_ctrl_gpio, "Video Control")) { + dev_err(&pdev->dev, "%s: Get video ctrl GPIO failed.\n", + __func__); + goto fail_video_ctrl_gpio; + } + } + + if (create_btn_input_dev(dd) < 0) { + dev_err(&pdev->dev, "%s: create_button_input_dev failed.\n", + __func__); + goto fail_no_btn_input_dev; + } + + if (create_regulators(dd) < 0) { + dev_err(&pdev->dev, "%s: failed to create regulators\n", + __func__); + goto fail_no_regulators; + } + dd->btn_state = BUTTON_UNK; + + dd->irq_work_queue = create_singlethread_workqueue("ab8500_accdet_wq"); + if (!dd->irq_work_queue) { + dev_err(&pdev->dev, "%s: Failed to create wq\n", __func__); + goto fail_no_mem_for_wq; + } + dd->gpadc = ab8500_gpadc_get(); + + INIT_DELAYED_WORK(&dd->detect_work, detect_work); + INIT_DELAYED_WORK(&dd->unplug_irq_work, unplug_irq_handler_work); + INIT_DELAYED_WORK(&dd->init_work, init_work); + + /* Deferred init/detect since no use for the info early in boot */ + queue_delayed_work(dd->irq_work_queue, + &dd->init_work, + msecs_to_jiffies(INIT_DELAY_MS)); + + platform_set_drvdata(pdev, dd); + + return 0; + +fail_no_mem_for_wq: + free_regulators(); +fail_no_regulators: + input_unregister_device(dd->btn_input_dev); +fail_no_btn_input_dev: + gpio_free(dd->pdata->video_ctrl_gpio); +fail_video_ctrl_gpio: +fail_no_ab8500_dev: + kfree(dd); +fail_no_mem_for_devdata: + + return -ENOMEM; +} + +/* + * Performs platform device cleanup + */ +void ab8500_accessory_cleanup(struct ab8500_ad *dd) +{ + dev_dbg(&dd->pdev->dev, "Enter: %s\n", __func__); + + dd->jack_type = JACK_TYPE_UNSPECIFIED; + config_accdetect(dd); + + gpio_free(dd->pdata->video_ctrl_gpio); + input_unregister_device(dd->btn_input_dev); + free_regulators(); + + cancel_delayed_work(&dd->detect_work); + cancel_delayed_work(&dd->unplug_irq_work); + cancel_delayed_work(&dd->init_work); + flush_workqueue(dd->irq_work_queue); + destroy_workqueue(dd->irq_work_queue); + + kfree(dd); +} + +static int __devinit ab8500_acc_detect_probe(struct platform_device *pdev) +{ + return ab8500_accessory_init(pdev); +} + + +static int __devexit ab8500_acc_detect_remove(struct platform_device *pdev) +{ + ab8500_accessory_cleanup(platform_get_drvdata(pdev)); + platform_set_drvdata(pdev, NULL); + + return 0; +} + +#if defined(CONFIG_PM) +static int ab8500_acc_detect_suspend(struct platform_device *pdev, + pm_message_t state) +{ + struct ab8500_ad *dd = platform_get_drvdata(pdev); + + dev_dbg(&dd->pdev->dev, "%s: Enter\n", __func__); + + cancel_delayed_work_sync(&dd->unplug_irq_work); + cancel_delayed_work_sync(&dd->detect_work); + cancel_delayed_work_sync(&dd->init_work); + + return 0; +} + +static int ab8500_acc_detect_resume(struct platform_device *pdev) +{ + struct ab8500_ad *dd = platform_get_drvdata(pdev); + + dev_dbg(&dd->pdev->dev, "%s: Enter\n", __func__); + + /* After resume, reinitialize */ + dd->gpio35_dir_set = dd->accdet1_th_set = dd->accdet2_th_set = 0; + queue_delayed_work(dd->irq_work_queue, &dd->init_work, 0); + + return 0; +} +#else +#define ab8500_acc_detect_suspend NULL +#define ab8500_acc_detect_resume NULL +#endif + +static struct platform_driver ab8500_acc_detect_platform_driver = { + .driver = { + .name = "ab8500-acc-det", + .owner = THIS_MODULE, + }, + .probe = ab8500_acc_detect_probe, + .remove = __devexit_p(ab8500_acc_detect_remove), + .suspend = ab8500_acc_detect_suspend, + .resume = ab8500_acc_detect_resume, +}; + +static int __init ab8500_acc_detect_init(void) +{ + return platform_driver_register(&ab8500_acc_detect_platform_driver); +} + +static void __exit ab8500_acc_detect_exit(void) +{ + platform_driver_unregister(&ab8500_acc_detect_platform_driver); +} + +module_init(ab8500_acc_detect_init); +module_exit(ab8500_acc_detect_exit); + +MODULE_DESCRIPTION("AB8500 AV Accessory detection driver"); +MODULE_ALIAS("platform:ab8500-acc-det"); +MODULE_AUTHOR("ST-Ericsson"); +MODULE_LICENSE("GPL v2"); |