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![Srikant Ritolia](/assets/img/avatar_default.png)
Aligning all block comments in extcon subsystem as per linux coding style. Found using checkpatch.pl script. Signed-off-by: Srikant Ritolia <s.ritolia@samsung.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
798 lines
21 KiB
C
798 lines
21 KiB
C
/*
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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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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/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.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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int ret = 0;
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u8 ctrl1, ctrl2 = 0;
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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)
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{
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int chg_type;
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bool attached;
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int ret = 0;
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|
|
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 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);
|
|
|
|
INIT_WORK(&info->irq_work, max14577_muic_irq_work);
|
|
|
|
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 -ENOMEM;
|
|
}
|
|
|
|
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 */
|
|
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 int max14577_muic_remove(struct platform_device *pdev)
|
|
{
|
|
struct max14577_muic_info *info = platform_get_drvdata(pdev);
|
|
|
|
cancel_work_sync(&info->irq_work);
|
|
|
|
return 0;
|
|
}
|
|
|
|
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 struct platform_driver max14577_muic_driver = {
|
|
.driver = {
|
|
.name = "max14577-muic",
|
|
},
|
|
.probe = max14577_muic_probe,
|
|
.remove = max14577_muic_remove,
|
|
.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");
|