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![Matti Vaittinen](/assets/img/avatar_default.png)
The extcon IRQ schedules a work item. IRQ is requested using devm while WQ is cancelld at remove(). This mixing of devm and manual unwinding has potential case where the WQ has been emptied (.remove() was ran) but devm unwinding of IRQ was not yet done. It is possible the IRQ is triggered at this point scheduling new work item to the already flushed queue. Use new devm_work_autocancel() to remove the remove() and to kill the bug. Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> Reviewed-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Chanwoo Choi <cw00.choi@samsung.com> Link: https://lore.kernel.org/r/ee8545f59ae3a93f0a70f640ecbd7e31cfadbcb9.1623146580.git.matti.vaittinen@fi.rohmeurope.com Signed-off-by: Hans de Goede <hdegoede@redhat.com>
803 lines
22 KiB
C
803 lines
22 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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//
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// extcon-max14577.c - MAX14577/77836 extcon driver to support MUIC
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//
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// Copyright (C) 2013,2014 Samsung Electronics
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// Chanwoo Choi <cw00.choi@samsung.com>
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// Krzysztof Kozlowski <krzk@kernel.org>
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#include <linux/devm-helpers.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/i2c.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <linux/mfd/max14577.h>
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#include <linux/mfd/max14577-private.h>
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#include <linux/extcon-provider.h>
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#define DELAY_MS_DEFAULT 17000 /* unit: millisecond */
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enum max14577_muic_adc_debounce_time {
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ADC_DEBOUNCE_TIME_5MS = 0,
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ADC_DEBOUNCE_TIME_10MS,
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ADC_DEBOUNCE_TIME_25MS,
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ADC_DEBOUNCE_TIME_38_62MS,
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};
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enum max14577_muic_status {
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MAX14577_MUIC_STATUS1 = 0,
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MAX14577_MUIC_STATUS2 = 1,
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MAX14577_MUIC_STATUS_END,
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};
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/**
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* struct max14577_muic_irq
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* @irq: the index of irq list of MUIC device.
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* @name: the name of irq.
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* @virq: the virtual irq to use irq domain
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*/
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struct max14577_muic_irq {
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unsigned int irq;
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const char *name;
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unsigned int virq;
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};
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static struct max14577_muic_irq max14577_muic_irqs[] = {
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{ MAX14577_IRQ_INT1_ADC, "muic-ADC" },
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{ MAX14577_IRQ_INT1_ADCLOW, "muic-ADCLOW" },
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{ MAX14577_IRQ_INT1_ADCERR, "muic-ADCError" },
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{ MAX14577_IRQ_INT2_CHGTYP, "muic-CHGTYP" },
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{ MAX14577_IRQ_INT2_CHGDETRUN, "muic-CHGDETRUN" },
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{ MAX14577_IRQ_INT2_DCDTMR, "muic-DCDTMR" },
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{ MAX14577_IRQ_INT2_DBCHG, "muic-DBCHG" },
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{ MAX14577_IRQ_INT2_VBVOLT, "muic-VBVOLT" },
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};
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static struct max14577_muic_irq max77836_muic_irqs[] = {
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{ MAX14577_IRQ_INT1_ADC, "muic-ADC" },
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{ MAX14577_IRQ_INT1_ADCLOW, "muic-ADCLOW" },
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{ MAX14577_IRQ_INT1_ADCERR, "muic-ADCError" },
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{ MAX77836_IRQ_INT1_ADC1K, "muic-ADC1K" },
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{ MAX14577_IRQ_INT2_CHGTYP, "muic-CHGTYP" },
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{ MAX14577_IRQ_INT2_CHGDETRUN, "muic-CHGDETRUN" },
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{ MAX14577_IRQ_INT2_DCDTMR, "muic-DCDTMR" },
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{ MAX14577_IRQ_INT2_DBCHG, "muic-DBCHG" },
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{ MAX14577_IRQ_INT2_VBVOLT, "muic-VBVOLT" },
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{ MAX77836_IRQ_INT2_VIDRM, "muic-VIDRM" },
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};
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struct max14577_muic_info {
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struct device *dev;
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struct max14577 *max14577;
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struct extcon_dev *edev;
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int prev_cable_type;
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int prev_chg_type;
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u8 status[MAX14577_MUIC_STATUS_END];
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struct max14577_muic_irq *muic_irqs;
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unsigned int muic_irqs_num;
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bool irq_adc;
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bool irq_chg;
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struct work_struct irq_work;
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struct mutex mutex;
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/*
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* Use delayed workqueue to detect cable state and then
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* notify cable state to notifiee/platform through uevent.
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* After completing the booting of platform, the extcon provider
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* driver should notify cable state to upper layer.
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*/
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struct delayed_work wq_detcable;
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/*
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* Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
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* h/w path of COMP2/COMN1 on CONTROL1 register.
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*/
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int path_usb;
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int path_uart;
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};
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enum max14577_muic_cable_group {
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MAX14577_CABLE_GROUP_ADC = 0,
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MAX14577_CABLE_GROUP_CHG,
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};
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/* Define supported accessory type */
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enum max14577_muic_acc_type {
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MAX14577_MUIC_ADC_GROUND = 0x0,
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MAX14577_MUIC_ADC_SEND_END_BUTTON,
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MAX14577_MUIC_ADC_REMOTE_S1_BUTTON,
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MAX14577_MUIC_ADC_REMOTE_S2_BUTTON,
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MAX14577_MUIC_ADC_REMOTE_S3_BUTTON,
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MAX14577_MUIC_ADC_REMOTE_S4_BUTTON,
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MAX14577_MUIC_ADC_REMOTE_S5_BUTTON,
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MAX14577_MUIC_ADC_REMOTE_S6_BUTTON,
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MAX14577_MUIC_ADC_REMOTE_S7_BUTTON,
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MAX14577_MUIC_ADC_REMOTE_S8_BUTTON,
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MAX14577_MUIC_ADC_REMOTE_S9_BUTTON,
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MAX14577_MUIC_ADC_REMOTE_S10_BUTTON,
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MAX14577_MUIC_ADC_REMOTE_S11_BUTTON,
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MAX14577_MUIC_ADC_REMOTE_S12_BUTTON,
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MAX14577_MUIC_ADC_RESERVED_ACC_1,
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MAX14577_MUIC_ADC_RESERVED_ACC_2,
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MAX14577_MUIC_ADC_RESERVED_ACC_3,
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MAX14577_MUIC_ADC_RESERVED_ACC_4,
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MAX14577_MUIC_ADC_RESERVED_ACC_5,
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MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE2,
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MAX14577_MUIC_ADC_PHONE_POWERED_DEV,
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MAX14577_MUIC_ADC_TTY_CONVERTER,
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MAX14577_MUIC_ADC_UART_CABLE,
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MAX14577_MUIC_ADC_CEA936A_TYPE1_CHG,
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MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF,
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MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON,
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MAX14577_MUIC_ADC_AV_CABLE_NOLOAD,
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MAX14577_MUIC_ADC_CEA936A_TYPE2_CHG,
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MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF,
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MAX14577_MUIC_ADC_FACTORY_MODE_UART_ON,
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MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE1, /* with Remote and Simple Ctrl */
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MAX14577_MUIC_ADC_OPEN,
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};
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static const unsigned int max14577_extcon_cable[] = {
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EXTCON_USB,
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EXTCON_CHG_USB_SDP,
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EXTCON_CHG_USB_DCP,
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EXTCON_CHG_USB_FAST,
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EXTCON_CHG_USB_SLOW,
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EXTCON_CHG_USB_CDP,
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EXTCON_JIG,
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EXTCON_NONE,
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};
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/*
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* max14577_muic_set_debounce_time - Set the debounce time of ADC
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* @info: the instance including private data of max14577 MUIC
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* @time: the debounce time of ADC
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*/
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static int max14577_muic_set_debounce_time(struct max14577_muic_info *info,
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enum max14577_muic_adc_debounce_time time)
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{
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u8 ret;
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switch (time) {
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case ADC_DEBOUNCE_TIME_5MS:
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case ADC_DEBOUNCE_TIME_10MS:
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case ADC_DEBOUNCE_TIME_25MS:
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case ADC_DEBOUNCE_TIME_38_62MS:
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ret = max14577_update_reg(info->max14577->regmap,
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MAX14577_MUIC_REG_CONTROL3,
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CTRL3_ADCDBSET_MASK,
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time << CTRL3_ADCDBSET_SHIFT);
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if (ret) {
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dev_err(info->dev, "failed to set ADC debounce time\n");
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return ret;
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}
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break;
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default:
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dev_err(info->dev, "invalid ADC debounce time\n");
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return -EINVAL;
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}
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return 0;
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};
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/*
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* max14577_muic_set_path - Set hardware line according to attached cable
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* @info: the instance including private data of max14577 MUIC
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* @value: the path according to attached cable
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* @attached: the state of cable (true:attached, false:detached)
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*
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* The max14577 MUIC device share outside H/W line among a varity of cables
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* so, this function set internal path of H/W line according to the type of
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* attached cable.
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*/
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static int max14577_muic_set_path(struct max14577_muic_info *info,
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u8 val, bool attached)
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{
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u8 ctrl1, ctrl2 = 0;
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int ret;
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/* Set open state to path before changing hw path */
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ret = max14577_update_reg(info->max14577->regmap,
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MAX14577_MUIC_REG_CONTROL1,
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CLEAR_IDBEN_MICEN_MASK, CTRL1_SW_OPEN);
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if (ret < 0) {
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dev_err(info->dev, "failed to update MUIC register\n");
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return ret;
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}
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if (attached)
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ctrl1 = val;
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else
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ctrl1 = CTRL1_SW_OPEN;
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ret = max14577_update_reg(info->max14577->regmap,
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MAX14577_MUIC_REG_CONTROL1,
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CLEAR_IDBEN_MICEN_MASK, ctrl1);
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if (ret < 0) {
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dev_err(info->dev, "failed to update MUIC register\n");
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return ret;
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}
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if (attached)
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ctrl2 |= CTRL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */
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else
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ctrl2 |= CTRL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */
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ret = max14577_update_reg(info->max14577->regmap,
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MAX14577_REG_CONTROL2,
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CTRL2_LOWPWR_MASK | CTRL2_CPEN_MASK, ctrl2);
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if (ret < 0) {
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dev_err(info->dev, "failed to update MUIC register\n");
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return ret;
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}
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dev_dbg(info->dev,
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"CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
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ctrl1, ctrl2, attached ? "attached" : "detached");
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return 0;
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}
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/*
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* max14577_muic_get_cable_type - Return cable type and check cable state
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* @info: the instance including private data of max14577 MUIC
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* @group: the path according to attached cable
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* @attached: store cable state and return
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*
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* This function check the cable state either attached or detached,
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* and then divide precise type of cable according to cable group.
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* - max14577_CABLE_GROUP_ADC
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* - max14577_CABLE_GROUP_CHG
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*/
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static int max14577_muic_get_cable_type(struct max14577_muic_info *info,
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enum max14577_muic_cable_group group, bool *attached)
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{
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int cable_type = 0;
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int adc;
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int chg_type;
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switch (group) {
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case MAX14577_CABLE_GROUP_ADC:
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/*
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* Read ADC value to check cable type and decide cable state
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* according to cable type
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*/
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adc = info->status[MAX14577_MUIC_STATUS1] & STATUS1_ADC_MASK;
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adc >>= STATUS1_ADC_SHIFT;
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/*
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* Check current cable state/cable type and store cable type
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* (info->prev_cable_type) for handling cable when cable is
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* detached.
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*/
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if (adc == MAX14577_MUIC_ADC_OPEN) {
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*attached = false;
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cable_type = info->prev_cable_type;
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info->prev_cable_type = MAX14577_MUIC_ADC_OPEN;
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} else {
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*attached = true;
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cable_type = info->prev_cable_type = adc;
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}
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break;
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case MAX14577_CABLE_GROUP_CHG:
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/*
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* Read charger type to check cable type and decide cable state
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* according to type of charger cable.
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*/
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chg_type = info->status[MAX14577_MUIC_STATUS2] &
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STATUS2_CHGTYP_MASK;
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chg_type >>= STATUS2_CHGTYP_SHIFT;
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if (chg_type == MAX14577_CHARGER_TYPE_NONE) {
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*attached = false;
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cable_type = info->prev_chg_type;
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info->prev_chg_type = MAX14577_CHARGER_TYPE_NONE;
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} else {
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*attached = true;
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/*
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* Check current cable state/cable type and store cable
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* type(info->prev_chg_type) for handling cable when
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* charger cable is detached.
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*/
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cable_type = info->prev_chg_type = chg_type;
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}
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break;
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default:
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dev_err(info->dev, "Unknown cable group (%d)\n", group);
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cable_type = -EINVAL;
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break;
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}
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return cable_type;
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}
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static int max14577_muic_jig_handler(struct max14577_muic_info *info,
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int cable_type, bool attached)
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{
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int ret = 0;
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u8 path = CTRL1_SW_OPEN;
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dev_dbg(info->dev,
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"external connector is %s (adc:0x%02x)\n",
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attached ? "attached" : "detached", cable_type);
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switch (cable_type) {
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case MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF: /* ADC_JIG_USB_OFF */
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case MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON: /* ADC_JIG_USB_ON */
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/* PATH:AP_USB */
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path = CTRL1_SW_USB;
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break;
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case MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF: /* ADC_JIG_UART_OFF */
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/* PATH:AP_UART */
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path = CTRL1_SW_UART;
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break;
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default:
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dev_err(info->dev, "failed to detect %s jig cable\n",
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attached ? "attached" : "detached");
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return -EINVAL;
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}
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ret = max14577_muic_set_path(info, path, attached);
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if (ret < 0)
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return ret;
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extcon_set_state_sync(info->edev, EXTCON_JIG, attached);
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return 0;
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}
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static int max14577_muic_adc_handler(struct max14577_muic_info *info)
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{
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int cable_type;
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bool attached;
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int ret = 0;
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/* Check accessory state which is either detached or attached */
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cable_type = max14577_muic_get_cable_type(info,
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MAX14577_CABLE_GROUP_ADC, &attached);
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dev_dbg(info->dev,
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"external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
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attached ? "attached" : "detached", cable_type,
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info->prev_cable_type);
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switch (cable_type) {
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case MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF:
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case MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON:
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case MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF:
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/* JIG */
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ret = max14577_muic_jig_handler(info, cable_type, attached);
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if (ret < 0)
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return ret;
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break;
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case MAX14577_MUIC_ADC_GROUND:
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case MAX14577_MUIC_ADC_SEND_END_BUTTON:
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case MAX14577_MUIC_ADC_REMOTE_S1_BUTTON:
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case MAX14577_MUIC_ADC_REMOTE_S2_BUTTON:
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case MAX14577_MUIC_ADC_REMOTE_S3_BUTTON:
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case MAX14577_MUIC_ADC_REMOTE_S4_BUTTON:
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case MAX14577_MUIC_ADC_REMOTE_S5_BUTTON:
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case MAX14577_MUIC_ADC_REMOTE_S6_BUTTON:
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case MAX14577_MUIC_ADC_REMOTE_S7_BUTTON:
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case MAX14577_MUIC_ADC_REMOTE_S8_BUTTON:
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case MAX14577_MUIC_ADC_REMOTE_S9_BUTTON:
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case MAX14577_MUIC_ADC_REMOTE_S10_BUTTON:
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case MAX14577_MUIC_ADC_REMOTE_S11_BUTTON:
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case MAX14577_MUIC_ADC_REMOTE_S12_BUTTON:
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case MAX14577_MUIC_ADC_RESERVED_ACC_1:
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case MAX14577_MUIC_ADC_RESERVED_ACC_2:
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case MAX14577_MUIC_ADC_RESERVED_ACC_3:
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case MAX14577_MUIC_ADC_RESERVED_ACC_4:
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case MAX14577_MUIC_ADC_RESERVED_ACC_5:
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case MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE2:
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case MAX14577_MUIC_ADC_PHONE_POWERED_DEV:
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case MAX14577_MUIC_ADC_TTY_CONVERTER:
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case MAX14577_MUIC_ADC_UART_CABLE:
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case MAX14577_MUIC_ADC_CEA936A_TYPE1_CHG:
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case MAX14577_MUIC_ADC_AV_CABLE_NOLOAD:
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case MAX14577_MUIC_ADC_CEA936A_TYPE2_CHG:
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case MAX14577_MUIC_ADC_FACTORY_MODE_UART_ON:
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case MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE1:
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/*
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* This accessory isn't used in general case if it is specially
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* needed to detect additional accessory, should implement
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* proper operation when this accessory is attached/detached.
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*/
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dev_info(info->dev,
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"accessory is %s but it isn't used (adc:0x%x)\n",
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attached ? "attached" : "detached", cable_type);
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return -EAGAIN;
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default:
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dev_err(info->dev,
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"failed to detect %s accessory (adc:0x%x)\n",
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attached ? "attached" : "detached", cable_type);
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return -EINVAL;
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}
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return 0;
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}
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static int max14577_muic_chg_handler(struct max14577_muic_info *info)
|
|
{
|
|
int chg_type;
|
|
bool attached;
|
|
int ret = 0;
|
|
|
|
chg_type = max14577_muic_get_cable_type(info,
|
|
MAX14577_CABLE_GROUP_CHG, &attached);
|
|
|
|
dev_dbg(info->dev,
|
|
"external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
|
|
attached ? "attached" : "detached",
|
|
chg_type, info->prev_chg_type);
|
|
|
|
switch (chg_type) {
|
|
case MAX14577_CHARGER_TYPE_USB:
|
|
/* PATH:AP_USB */
|
|
ret = max14577_muic_set_path(info, info->path_usb, attached);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
extcon_set_state_sync(info->edev, EXTCON_USB, attached);
|
|
extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
|
|
attached);
|
|
break;
|
|
case MAX14577_CHARGER_TYPE_DEDICATED_CHG:
|
|
extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
|
|
attached);
|
|
break;
|
|
case MAX14577_CHARGER_TYPE_DOWNSTREAM_PORT:
|
|
extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP,
|
|
attached);
|
|
break;
|
|
case MAX14577_CHARGER_TYPE_SPECIAL_500MA:
|
|
extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW,
|
|
attached);
|
|
break;
|
|
case MAX14577_CHARGER_TYPE_SPECIAL_1A:
|
|
extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST,
|
|
attached);
|
|
break;
|
|
case MAX14577_CHARGER_TYPE_NONE:
|
|
case MAX14577_CHARGER_TYPE_DEAD_BATTERY:
|
|
break;
|
|
default:
|
|
dev_err(info->dev,
|
|
"failed to detect %s accessory (chg_type:0x%x)\n",
|
|
attached ? "attached" : "detached", chg_type);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void max14577_muic_irq_work(struct work_struct *work)
|
|
{
|
|
struct max14577_muic_info *info = container_of(work,
|
|
struct max14577_muic_info, irq_work);
|
|
int ret = 0;
|
|
|
|
if (!info->edev)
|
|
return;
|
|
|
|
mutex_lock(&info->mutex);
|
|
|
|
ret = max14577_bulk_read(info->max14577->regmap,
|
|
MAX14577_MUIC_REG_STATUS1, info->status, 2);
|
|
if (ret) {
|
|
dev_err(info->dev, "failed to read MUIC register\n");
|
|
mutex_unlock(&info->mutex);
|
|
return;
|
|
}
|
|
|
|
if (info->irq_adc) {
|
|
ret = max14577_muic_adc_handler(info);
|
|
info->irq_adc = false;
|
|
}
|
|
if (info->irq_chg) {
|
|
ret = max14577_muic_chg_handler(info);
|
|
info->irq_chg = false;
|
|
}
|
|
|
|
if (ret < 0)
|
|
dev_err(info->dev, "failed to handle MUIC interrupt\n");
|
|
|
|
mutex_unlock(&info->mutex);
|
|
}
|
|
|
|
/*
|
|
* Sets irq_adc or irq_chg in max14577_muic_info and returns 1.
|
|
* Returns 0 if irq_type does not match registered IRQ for this device type.
|
|
*/
|
|
static int max14577_parse_irq(struct max14577_muic_info *info, int irq_type)
|
|
{
|
|
switch (irq_type) {
|
|
case MAX14577_IRQ_INT1_ADC:
|
|
case MAX14577_IRQ_INT1_ADCLOW:
|
|
case MAX14577_IRQ_INT1_ADCERR:
|
|
/*
|
|
* Handle all of accessory except for
|
|
* type of charger accessory.
|
|
*/
|
|
info->irq_adc = true;
|
|
return 1;
|
|
case MAX14577_IRQ_INT2_CHGTYP:
|
|
case MAX14577_IRQ_INT2_CHGDETRUN:
|
|
case MAX14577_IRQ_INT2_DCDTMR:
|
|
case MAX14577_IRQ_INT2_DBCHG:
|
|
case MAX14577_IRQ_INT2_VBVOLT:
|
|
/* Handle charger accessory */
|
|
info->irq_chg = true;
|
|
return 1;
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Sets irq_adc or irq_chg in max14577_muic_info and returns 1.
|
|
* Returns 0 if irq_type does not match registered IRQ for this device type.
|
|
*/
|
|
static int max77836_parse_irq(struct max14577_muic_info *info, int irq_type)
|
|
{
|
|
/* First check common max14577 interrupts */
|
|
if (max14577_parse_irq(info, irq_type))
|
|
return 1;
|
|
|
|
switch (irq_type) {
|
|
case MAX77836_IRQ_INT1_ADC1K:
|
|
info->irq_adc = true;
|
|
return 1;
|
|
case MAX77836_IRQ_INT2_VIDRM:
|
|
/* Handle charger accessory */
|
|
info->irq_chg = true;
|
|
return 1;
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static irqreturn_t max14577_muic_irq_handler(int irq, void *data)
|
|
{
|
|
struct max14577_muic_info *info = data;
|
|
int i, irq_type = -1;
|
|
bool irq_parsed;
|
|
|
|
/*
|
|
* We may be called multiple times for different nested IRQ-s.
|
|
* Including changes in INT1_ADC and INT2_CGHTYP at once.
|
|
* However we only need to know whether it was ADC, charger
|
|
* or both interrupts so decode IRQ and turn on proper flags.
|
|
*/
|
|
for (i = 0; i < info->muic_irqs_num; i++)
|
|
if (irq == info->muic_irqs[i].virq)
|
|
irq_type = info->muic_irqs[i].irq;
|
|
|
|
switch (info->max14577->dev_type) {
|
|
case MAXIM_DEVICE_TYPE_MAX77836:
|
|
irq_parsed = max77836_parse_irq(info, irq_type);
|
|
break;
|
|
case MAXIM_DEVICE_TYPE_MAX14577:
|
|
default:
|
|
irq_parsed = max14577_parse_irq(info, irq_type);
|
|
break;
|
|
}
|
|
|
|
if (!irq_parsed) {
|
|
dev_err(info->dev, "muic interrupt: irq %d occurred, skipped\n",
|
|
irq_type);
|
|
return IRQ_HANDLED;
|
|
}
|
|
schedule_work(&info->irq_work);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int max14577_muic_detect_accessory(struct max14577_muic_info *info)
|
|
{
|
|
int ret = 0;
|
|
int adc;
|
|
int chg_type;
|
|
bool attached;
|
|
|
|
mutex_lock(&info->mutex);
|
|
|
|
/* Read STATUSx register to detect accessory */
|
|
ret = max14577_bulk_read(info->max14577->regmap,
|
|
MAX14577_MUIC_REG_STATUS1, info->status, 2);
|
|
if (ret) {
|
|
dev_err(info->dev, "failed to read MUIC register\n");
|
|
mutex_unlock(&info->mutex);
|
|
return ret;
|
|
}
|
|
|
|
adc = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_ADC,
|
|
&attached);
|
|
if (attached && adc != MAX14577_MUIC_ADC_OPEN) {
|
|
ret = max14577_muic_adc_handler(info);
|
|
if (ret < 0) {
|
|
dev_err(info->dev, "Cannot detect accessory\n");
|
|
mutex_unlock(&info->mutex);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
chg_type = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_CHG,
|
|
&attached);
|
|
if (attached && chg_type != MAX14577_CHARGER_TYPE_NONE) {
|
|
ret = max14577_muic_chg_handler(info);
|
|
if (ret < 0) {
|
|
dev_err(info->dev, "Cannot detect charger accessory\n");
|
|
mutex_unlock(&info->mutex);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
mutex_unlock(&info->mutex);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void max14577_muic_detect_cable_wq(struct work_struct *work)
|
|
{
|
|
struct max14577_muic_info *info = container_of(to_delayed_work(work),
|
|
struct max14577_muic_info, wq_detcable);
|
|
|
|
max14577_muic_detect_accessory(info);
|
|
}
|
|
|
|
static int max14577_muic_probe(struct platform_device *pdev)
|
|
{
|
|
struct max14577 *max14577 = dev_get_drvdata(pdev->dev.parent);
|
|
struct max14577_muic_info *info;
|
|
int delay_jiffies;
|
|
int cable_type;
|
|
bool attached;
|
|
int ret;
|
|
int i;
|
|
u8 id;
|
|
|
|
info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
|
|
if (!info)
|
|
return -ENOMEM;
|
|
|
|
info->dev = &pdev->dev;
|
|
info->max14577 = max14577;
|
|
|
|
platform_set_drvdata(pdev, info);
|
|
mutex_init(&info->mutex);
|
|
|
|
ret = devm_work_autocancel(&pdev->dev, &info->irq_work,
|
|
max14577_muic_irq_work);
|
|
if (ret)
|
|
return ret;
|
|
|
|
switch (max14577->dev_type) {
|
|
case MAXIM_DEVICE_TYPE_MAX77836:
|
|
info->muic_irqs = max77836_muic_irqs;
|
|
info->muic_irqs_num = ARRAY_SIZE(max77836_muic_irqs);
|
|
break;
|
|
case MAXIM_DEVICE_TYPE_MAX14577:
|
|
default:
|
|
info->muic_irqs = max14577_muic_irqs;
|
|
info->muic_irqs_num = ARRAY_SIZE(max14577_muic_irqs);
|
|
}
|
|
|
|
/* Support irq domain for max14577 MUIC device */
|
|
for (i = 0; i < info->muic_irqs_num; i++) {
|
|
struct max14577_muic_irq *muic_irq = &info->muic_irqs[i];
|
|
int virq = 0;
|
|
|
|
virq = regmap_irq_get_virq(max14577->irq_data, muic_irq->irq);
|
|
if (virq <= 0)
|
|
return -EINVAL;
|
|
muic_irq->virq = virq;
|
|
|
|
ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
|
|
max14577_muic_irq_handler,
|
|
IRQF_NO_SUSPEND,
|
|
muic_irq->name, info);
|
|
if (ret) {
|
|
dev_err(&pdev->dev,
|
|
"failed: irq request (IRQ: %d, error :%d)\n",
|
|
muic_irq->irq, ret);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
/* Initialize extcon device */
|
|
info->edev = devm_extcon_dev_allocate(&pdev->dev,
|
|
max14577_extcon_cable);
|
|
if (IS_ERR(info->edev)) {
|
|
dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
|
|
return PTR_ERR(info->edev);
|
|
}
|
|
|
|
ret = devm_extcon_dev_register(&pdev->dev, info->edev);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to register extcon device\n");
|
|
return ret;
|
|
}
|
|
|
|
/* Default h/w line path */
|
|
info->path_usb = CTRL1_SW_USB;
|
|
info->path_uart = CTRL1_SW_UART;
|
|
delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
|
|
|
|
/* Set initial path for UART when JIG is connected to get serial logs */
|
|
ret = max14577_bulk_read(info->max14577->regmap,
|
|
MAX14577_MUIC_REG_STATUS1, info->status, 2);
|
|
if (ret) {
|
|
dev_err(info->dev, "Cannot read STATUS registers\n");
|
|
return ret;
|
|
}
|
|
cable_type = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_ADC,
|
|
&attached);
|
|
if (attached && cable_type == MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF)
|
|
max14577_muic_set_path(info, info->path_uart, true);
|
|
|
|
/* Check revision number of MUIC device*/
|
|
ret = max14577_read_reg(info->max14577->regmap,
|
|
MAX14577_REG_DEVICEID, &id);
|
|
if (ret < 0) {
|
|
dev_err(&pdev->dev, "failed to read revision number\n");
|
|
return ret;
|
|
}
|
|
dev_info(info->dev, "device ID : 0x%x\n", id);
|
|
|
|
/* Set ADC debounce time */
|
|
max14577_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
|
|
|
|
/*
|
|
* Detect accessory after completing the initialization of platform
|
|
*
|
|
* - Use delayed workqueue to detect cable state and then
|
|
* notify cable state to notifiee/platform through uevent.
|
|
* After completing the booting of platform, the extcon provider
|
|
* driver should notify cable state to upper layer.
|
|
*/
|
|
INIT_DELAYED_WORK(&info->wq_detcable, max14577_muic_detect_cable_wq);
|
|
queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
|
|
delay_jiffies);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct platform_device_id max14577_muic_id[] = {
|
|
{ "max14577-muic", MAXIM_DEVICE_TYPE_MAX14577, },
|
|
{ "max77836-muic", MAXIM_DEVICE_TYPE_MAX77836, },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(platform, max14577_muic_id);
|
|
|
|
static const struct of_device_id of_max14577_muic_dt_match[] = {
|
|
{ .compatible = "maxim,max14577-muic",
|
|
.data = (void *)MAXIM_DEVICE_TYPE_MAX14577, },
|
|
{ .compatible = "maxim,max77836-muic",
|
|
.data = (void *)MAXIM_DEVICE_TYPE_MAX77836, },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, of_max14577_muic_dt_match);
|
|
|
|
static struct platform_driver max14577_muic_driver = {
|
|
.driver = {
|
|
.name = "max14577-muic",
|
|
.of_match_table = of_max14577_muic_dt_match,
|
|
},
|
|
.probe = max14577_muic_probe,
|
|
.id_table = max14577_muic_id,
|
|
};
|
|
|
|
module_platform_driver(max14577_muic_driver);
|
|
|
|
MODULE_DESCRIPTION("Maxim 14577/77836 Extcon driver");
|
|
MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>, Krzysztof Kozlowski <krzk@kernel.org>");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:extcon-max14577");
|