806 lines
21 KiB
C
806 lines
21 KiB
C
/*
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* extcon-max8997.c - MAX8997 extcon driver to support MAX8997 MUIC
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*
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* Copyright (C) 2012 Samsung Electronics
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* Donggeun Kim <dg77.kim@samsung.com>
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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/slab.h>
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#include <linux/interrupt.h>
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#include <linux/err.h>
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#include <linux/platform_device.h>
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#include <linux/kobject.h>
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#include <linux/mfd/max8997.h>
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#include <linux/mfd/max8997-private.h>
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#include <linux/extcon.h>
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#include <linux/irqdomain.h>
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#define DEV_NAME "max8997-muic"
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#define DELAY_MS_DEFAULT 20000 /* unit: millisecond */
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enum max8997_muic_adc_debounce_time {
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ADC_DEBOUNCE_TIME_0_5MS = 0, /* 0.5ms */
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ADC_DEBOUNCE_TIME_10MS, /* 10ms */
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ADC_DEBOUNCE_TIME_25MS, /* 25ms */
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ADC_DEBOUNCE_TIME_38_62MS, /* 38.62ms */
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};
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struct max8997_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 max8997_muic_irq muic_irqs[] = {
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{ MAX8997_MUICIRQ_ADCError, "muic-ADCERROR" },
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{ MAX8997_MUICIRQ_ADCLow, "muic-ADCLOW" },
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{ MAX8997_MUICIRQ_ADC, "muic-ADC" },
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{ MAX8997_MUICIRQ_VBVolt, "muic-VBVOLT" },
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{ MAX8997_MUICIRQ_DBChg, "muic-DBCHG" },
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{ MAX8997_MUICIRQ_DCDTmr, "muic-DCDTMR" },
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{ MAX8997_MUICIRQ_ChgDetRun, "muic-CHGDETRUN" },
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{ MAX8997_MUICIRQ_ChgTyp, "muic-CHGTYP" },
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{ MAX8997_MUICIRQ_OVP, "muic-OVP" },
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};
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/* Define supported cable type */
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enum max8997_muic_acc_type {
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MAX8997_MUIC_ADC_GROUND = 0x0,
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MAX8997_MUIC_ADC_MHL, /* MHL*/
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MAX8997_MUIC_ADC_REMOTE_S1_BUTTON,
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MAX8997_MUIC_ADC_REMOTE_S2_BUTTON,
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MAX8997_MUIC_ADC_REMOTE_S3_BUTTON,
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MAX8997_MUIC_ADC_REMOTE_S4_BUTTON,
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MAX8997_MUIC_ADC_REMOTE_S5_BUTTON,
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MAX8997_MUIC_ADC_REMOTE_S6_BUTTON,
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MAX8997_MUIC_ADC_REMOTE_S7_BUTTON,
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MAX8997_MUIC_ADC_REMOTE_S8_BUTTON,
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MAX8997_MUIC_ADC_REMOTE_S9_BUTTON,
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MAX8997_MUIC_ADC_REMOTE_S10_BUTTON,
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MAX8997_MUIC_ADC_REMOTE_S11_BUTTON,
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MAX8997_MUIC_ADC_REMOTE_S12_BUTTON,
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MAX8997_MUIC_ADC_RESERVED_ACC_1,
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MAX8997_MUIC_ADC_RESERVED_ACC_2,
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MAX8997_MUIC_ADC_RESERVED_ACC_3,
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MAX8997_MUIC_ADC_RESERVED_ACC_4,
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MAX8997_MUIC_ADC_RESERVED_ACC_5,
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MAX8997_MUIC_ADC_CEA936_AUDIO,
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MAX8997_MUIC_ADC_PHONE_POWERED_DEV,
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MAX8997_MUIC_ADC_TTY_CONVERTER,
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MAX8997_MUIC_ADC_UART_CABLE,
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MAX8997_MUIC_ADC_CEA936A_TYPE1_CHG,
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MAX8997_MUIC_ADC_FACTORY_MODE_USB_OFF, /* JIG-USB-OFF */
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MAX8997_MUIC_ADC_FACTORY_MODE_USB_ON, /* JIG-USB-ON */
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MAX8997_MUIC_ADC_AV_CABLE_NOLOAD, /* DESKDOCK */
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MAX8997_MUIC_ADC_CEA936A_TYPE2_CHG,
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MAX8997_MUIC_ADC_FACTORY_MODE_UART_OFF, /* JIG-UART */
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MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON, /* CARDOCK */
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MAX8997_MUIC_ADC_AUDIO_MODE_REMOTE,
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MAX8997_MUIC_ADC_OPEN, /* OPEN */
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};
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enum max8997_muic_cable_group {
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MAX8997_CABLE_GROUP_ADC = 0,
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MAX8997_CABLE_GROUP_ADC_GND,
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MAX8997_CABLE_GROUP_CHG,
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MAX8997_CABLE_GROUP_VBVOLT,
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};
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enum max8997_muic_usb_type {
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MAX8997_USB_HOST,
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MAX8997_USB_DEVICE,
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};
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enum max8997_muic_charger_type {
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MAX8997_CHARGER_TYPE_NONE = 0,
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MAX8997_CHARGER_TYPE_USB,
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MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT,
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MAX8997_CHARGER_TYPE_DEDICATED_CHG,
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MAX8997_CHARGER_TYPE_500MA,
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MAX8997_CHARGER_TYPE_1A,
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MAX8997_CHARGER_TYPE_DEAD_BATTERY = 7,
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};
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struct max8997_muic_info {
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struct device *dev;
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struct i2c_client *muic;
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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[2];
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int irq;
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struct work_struct irq_work;
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struct mutex mutex;
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struct max8997_muic_platform_data *muic_pdata;
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enum max8997_muic_charger_type pre_charger_type;
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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 {
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EXTCON_CABLE_USB = 0,
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EXTCON_CABLE_USB_HOST,
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EXTCON_CABLE_TA,
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EXTCON_CABLE_FAST_CHARGER,
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EXTCON_CABLE_SLOW_CHARGER,
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EXTCON_CABLE_CHARGE_DOWNSTREAM,
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EXTCON_CABLE_MHL,
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EXTCON_CABLE_DOCK_DESK,
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EXTCON_CABLE_DOCK_CARD,
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EXTCON_CABLE_JIG,
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_EXTCON_CABLE_NUM,
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};
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static const char *max8997_extcon_cable[] = {
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[EXTCON_CABLE_USB] = "USB",
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[EXTCON_CABLE_USB_HOST] = "USB-Host",
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[EXTCON_CABLE_TA] = "TA",
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[EXTCON_CABLE_FAST_CHARGER] = "Fast-charger",
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[EXTCON_CABLE_SLOW_CHARGER] = "Slow-charger",
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[EXTCON_CABLE_CHARGE_DOWNSTREAM] = "Charge-downstream",
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[EXTCON_CABLE_MHL] = "MHL",
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[EXTCON_CABLE_DOCK_DESK] = "Dock-Desk",
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[EXTCON_CABLE_DOCK_CARD] = "Dock-Card",
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[EXTCON_CABLE_JIG] = "JIG",
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NULL,
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};
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/*
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* max8997_muic_set_debounce_time - Set the debounce time of ADC
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* @info: the instance including private data of max8997 MUIC
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* @time: the debounce time of ADC
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*/
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static int max8997_muic_set_debounce_time(struct max8997_muic_info *info,
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enum max8997_muic_adc_debounce_time time)
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{
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int ret;
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switch (time) {
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case ADC_DEBOUNCE_TIME_0_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 = max8997_update_reg(info->muic,
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MAX8997_MUIC_REG_CONTROL3,
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time << CONTROL3_ADCDBSET_SHIFT,
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CONTROL3_ADCDBSET_MASK);
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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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* max8997_muic_set_path - Set hardware line according to attached cable
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* @info: the instance including private data of max8997 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 max8997 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 max8997_muic_set_path(struct max8997_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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if (attached)
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ctrl1 = val;
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else
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ctrl1 = CONTROL1_SW_OPEN;
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ret = max8997_update_reg(info->muic,
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MAX8997_MUIC_REG_CONTROL1, ctrl1, COMP_SW_MASK);
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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 |= CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */
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else
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ctrl2 |= CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */
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ret = max8997_update_reg(info->muic,
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MAX8997_MUIC_REG_CONTROL2, ctrl2,
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CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK);
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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_info(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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* max8997_muic_get_cable_type - Return cable type and check cable state
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* @info: the instance including private data of max8997 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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* - MAX8997_CABLE_GROUP_ADC
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* - MAX8997_CABLE_GROUP_CHG
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*/
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static int max8997_muic_get_cable_type(struct max8997_muic_info *info,
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enum max8997_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 MAX8997_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[0] & 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 == MAX8997_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 = MAX8997_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 MAX8997_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[1] & STATUS2_CHGTYP_MASK;
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chg_type >>= STATUS2_CHGTYP_SHIFT;
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if (chg_type == MAX8997_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 = MAX8997_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 max8997_muic_handle_usb(struct max8997_muic_info *info,
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enum max8997_muic_usb_type usb_type, bool attached)
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{
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int ret = 0;
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if (usb_type == MAX8997_USB_HOST) {
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ret = max8997_muic_set_path(info, info->path_usb, attached);
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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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}
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switch (usb_type) {
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case MAX8997_USB_HOST:
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extcon_set_cable_state(info->edev, "USB-Host", attached);
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break;
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case MAX8997_USB_DEVICE:
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extcon_set_cable_state(info->edev, "USB", attached);
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break;
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default:
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dev_err(info->dev, "failed to detect %s usb cable\n",
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attached ? "attached" : "detached");
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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 max8997_muic_handle_dock(struct max8997_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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ret = max8997_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
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if (ret) {
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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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switch (cable_type) {
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case MAX8997_MUIC_ADC_AV_CABLE_NOLOAD:
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extcon_set_cable_state(info->edev, "Dock-desk", attached);
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break;
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case MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON:
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extcon_set_cable_state(info->edev, "Dock-card", attached);
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break;
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default:
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dev_err(info->dev, "failed to detect %s dock device\n",
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attached ? "attached" : "detached");
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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 max8997_muic_handle_jig_uart(struct max8997_muic_info *info,
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bool attached)
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{
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int ret = 0;
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/* switch to UART */
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ret = max8997_muic_set_path(info, info->path_uart, attached);
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if (ret) {
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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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extcon_set_cable_state(info->edev, "JIG", attached);
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return 0;
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}
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static int max8997_muic_adc_handler(struct max8997_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 cable state which is either detached or attached */
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cable_type = max8997_muic_get_cable_type(info,
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MAX8997_CABLE_GROUP_ADC, &attached);
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switch (cable_type) {
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case MAX8997_MUIC_ADC_GROUND:
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ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, attached);
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if (ret < 0)
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return ret;
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break;
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case MAX8997_MUIC_ADC_MHL:
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extcon_set_cable_state(info->edev, "MHL", attached);
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break;
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case MAX8997_MUIC_ADC_FACTORY_MODE_USB_OFF:
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case MAX8997_MUIC_ADC_FACTORY_MODE_USB_ON:
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ret = max8997_muic_handle_usb(info,
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MAX8997_USB_DEVICE, attached);
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if (ret < 0)
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return ret;
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break;
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case MAX8997_MUIC_ADC_AV_CABLE_NOLOAD:
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case MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON:
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ret = max8997_muic_handle_dock(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 MAX8997_MUIC_ADC_FACTORY_MODE_UART_OFF:
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ret = max8997_muic_handle_jig_uart(info, attached);
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break;
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case MAX8997_MUIC_ADC_REMOTE_S1_BUTTON:
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case MAX8997_MUIC_ADC_REMOTE_S2_BUTTON:
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case MAX8997_MUIC_ADC_REMOTE_S3_BUTTON:
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case MAX8997_MUIC_ADC_REMOTE_S4_BUTTON:
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case MAX8997_MUIC_ADC_REMOTE_S5_BUTTON:
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case MAX8997_MUIC_ADC_REMOTE_S6_BUTTON:
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case MAX8997_MUIC_ADC_REMOTE_S7_BUTTON:
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case MAX8997_MUIC_ADC_REMOTE_S8_BUTTON:
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case MAX8997_MUIC_ADC_REMOTE_S9_BUTTON:
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case MAX8997_MUIC_ADC_REMOTE_S10_BUTTON:
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case MAX8997_MUIC_ADC_REMOTE_S11_BUTTON:
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case MAX8997_MUIC_ADC_REMOTE_S12_BUTTON:
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case MAX8997_MUIC_ADC_RESERVED_ACC_1:
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case MAX8997_MUIC_ADC_RESERVED_ACC_2:
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case MAX8997_MUIC_ADC_RESERVED_ACC_3:
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case MAX8997_MUIC_ADC_RESERVED_ACC_4:
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case MAX8997_MUIC_ADC_RESERVED_ACC_5:
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case MAX8997_MUIC_ADC_CEA936_AUDIO:
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case MAX8997_MUIC_ADC_PHONE_POWERED_DEV:
|
|
case MAX8997_MUIC_ADC_TTY_CONVERTER:
|
|
case MAX8997_MUIC_ADC_UART_CABLE:
|
|
case MAX8997_MUIC_ADC_CEA936A_TYPE1_CHG:
|
|
case MAX8997_MUIC_ADC_CEA936A_TYPE2_CHG:
|
|
case MAX8997_MUIC_ADC_AUDIO_MODE_REMOTE:
|
|
/*
|
|
* This cable isn't used in general case if it is specially
|
|
* needed to detect additional cable, should implement
|
|
* proper operation when this cable is attached/detached.
|
|
*/
|
|
dev_info(info->dev,
|
|
"cable is %s but it isn't used (type:0x%x)\n",
|
|
attached ? "attached" : "detached", cable_type);
|
|
return -EAGAIN;
|
|
default:
|
|
dev_err(info->dev,
|
|
"failed to detect %s unknown cable (type:0x%x)\n",
|
|
attached ? "attached" : "detached", cable_type);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int max8997_muic_chg_handler(struct max8997_muic_info *info)
|
|
{
|
|
int chg_type;
|
|
bool attached;
|
|
int adc;
|
|
|
|
chg_type = max8997_muic_get_cable_type(info,
|
|
MAX8997_CABLE_GROUP_CHG, &attached);
|
|
|
|
switch (chg_type) {
|
|
case MAX8997_CHARGER_TYPE_NONE:
|
|
break;
|
|
case MAX8997_CHARGER_TYPE_USB:
|
|
adc = info->status[0] & STATUS1_ADC_MASK;
|
|
adc >>= STATUS1_ADC_SHIFT;
|
|
|
|
if ((adc & STATUS1_ADC_MASK) == MAX8997_MUIC_ADC_OPEN) {
|
|
max8997_muic_handle_usb(info,
|
|
MAX8997_USB_DEVICE, attached);
|
|
}
|
|
break;
|
|
case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT:
|
|
extcon_set_cable_state(info->edev,
|
|
"Charge-downstream", attached);
|
|
break;
|
|
case MAX8997_CHARGER_TYPE_DEDICATED_CHG:
|
|
extcon_set_cable_state(info->edev, "TA", attached);
|
|
break;
|
|
case MAX8997_CHARGER_TYPE_500MA:
|
|
extcon_set_cable_state(info->edev, "Slow-charger", attached);
|
|
break;
|
|
case MAX8997_CHARGER_TYPE_1A:
|
|
extcon_set_cable_state(info->edev, "Fast-charger", attached);
|
|
break;
|
|
default:
|
|
dev_err(info->dev,
|
|
"failed to detect %s unknown chg cable (type:0x%x)\n",
|
|
attached ? "attached" : "detached", chg_type);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void max8997_muic_irq_work(struct work_struct *work)
|
|
{
|
|
struct max8997_muic_info *info = container_of(work,
|
|
struct max8997_muic_info, irq_work);
|
|
int irq_type = 0;
|
|
int i, ret;
|
|
|
|
if (!info->edev)
|
|
return;
|
|
|
|
mutex_lock(&info->mutex);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
|
|
if (info->irq == muic_irqs[i].virq)
|
|
irq_type = muic_irqs[i].irq;
|
|
|
|
ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1,
|
|
2, info->status);
|
|
if (ret) {
|
|
dev_err(info->dev, "failed to read muic register\n");
|
|
mutex_unlock(&info->mutex);
|
|
return;
|
|
}
|
|
|
|
switch (irq_type) {
|
|
case MAX8997_MUICIRQ_ADCError:
|
|
case MAX8997_MUICIRQ_ADCLow:
|
|
case MAX8997_MUICIRQ_ADC:
|
|
/* Handle all of cable except for charger cable */
|
|
ret = max8997_muic_adc_handler(info);
|
|
break;
|
|
case MAX8997_MUICIRQ_VBVolt:
|
|
case MAX8997_MUICIRQ_DBChg:
|
|
case MAX8997_MUICIRQ_DCDTmr:
|
|
case MAX8997_MUICIRQ_ChgDetRun:
|
|
case MAX8997_MUICIRQ_ChgTyp:
|
|
/* Handle charger cable */
|
|
ret = max8997_muic_chg_handler(info);
|
|
break;
|
|
case MAX8997_MUICIRQ_OVP:
|
|
break;
|
|
default:
|
|
dev_info(info->dev, "misc interrupt: irq %d occurred\n",
|
|
irq_type);
|
|
mutex_unlock(&info->mutex);
|
|
return;
|
|
}
|
|
|
|
if (ret < 0)
|
|
dev_err(info->dev, "failed to handle MUIC interrupt\n");
|
|
|
|
mutex_unlock(&info->mutex);
|
|
|
|
return;
|
|
}
|
|
|
|
static irqreturn_t max8997_muic_irq_handler(int irq, void *data)
|
|
{
|
|
struct max8997_muic_info *info = data;
|
|
|
|
dev_dbg(info->dev, "irq:%d\n", irq);
|
|
info->irq = irq;
|
|
|
|
schedule_work(&info->irq_work);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int max8997_muic_detect_dev(struct max8997_muic_info *info)
|
|
{
|
|
int ret = 0;
|
|
int adc;
|
|
int chg_type;
|
|
bool attached;
|
|
|
|
mutex_lock(&info->mutex);
|
|
|
|
/* Read STATUSx register to detect accessory */
|
|
ret = max8997_bulk_read(info->muic,
|
|
MAX8997_MUIC_REG_STATUS1, 2, info->status);
|
|
if (ret) {
|
|
dev_err(info->dev, "failed to read MUIC register\n");
|
|
mutex_unlock(&info->mutex);
|
|
return ret;
|
|
}
|
|
|
|
adc = max8997_muic_get_cable_type(info, MAX8997_CABLE_GROUP_ADC,
|
|
&attached);
|
|
if (attached && adc != MAX8997_MUIC_ADC_OPEN) {
|
|
ret = max8997_muic_adc_handler(info);
|
|
if (ret < 0) {
|
|
dev_err(info->dev, "Cannot detect ADC cable\n");
|
|
mutex_unlock(&info->mutex);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
chg_type = max8997_muic_get_cable_type(info, MAX8997_CABLE_GROUP_CHG,
|
|
&attached);
|
|
if (attached && chg_type != MAX8997_CHARGER_TYPE_NONE) {
|
|
ret = max8997_muic_chg_handler(info);
|
|
if (ret < 0) {
|
|
dev_err(info->dev, "Cannot detect charger cable\n");
|
|
mutex_unlock(&info->mutex);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
mutex_unlock(&info->mutex);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void max8997_muic_detect_cable_wq(struct work_struct *work)
|
|
{
|
|
struct max8997_muic_info *info = container_of(to_delayed_work(work),
|
|
struct max8997_muic_info, wq_detcable);
|
|
int ret;
|
|
|
|
ret = max8997_muic_detect_dev(info);
|
|
if (ret < 0)
|
|
dev_err(info->dev, "failed to detect cable type\n");
|
|
}
|
|
|
|
static int max8997_muic_probe(struct platform_device *pdev)
|
|
{
|
|
struct max8997_dev *max8997 = dev_get_drvdata(pdev->dev.parent);
|
|
struct max8997_platform_data *pdata = dev_get_platdata(max8997->dev);
|
|
struct max8997_muic_info *info;
|
|
int delay_jiffies;
|
|
int ret, i;
|
|
|
|
info = devm_kzalloc(&pdev->dev, sizeof(struct max8997_muic_info),
|
|
GFP_KERNEL);
|
|
if (!info)
|
|
return -ENOMEM;
|
|
|
|
info->dev = &pdev->dev;
|
|
info->muic = max8997->muic;
|
|
|
|
platform_set_drvdata(pdev, info);
|
|
mutex_init(&info->mutex);
|
|
|
|
INIT_WORK(&info->irq_work, max8997_muic_irq_work);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
|
|
struct max8997_muic_irq *muic_irq = &muic_irqs[i];
|
|
unsigned int virq = 0;
|
|
|
|
virq = irq_create_mapping(max8997->irq_domain, muic_irq->irq);
|
|
if (!virq) {
|
|
ret = -EINVAL;
|
|
goto err_irq;
|
|
}
|
|
muic_irq->virq = virq;
|
|
|
|
ret = request_threaded_irq(virq, NULL,
|
|
max8997_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);
|
|
goto err_irq;
|
|
}
|
|
}
|
|
|
|
/* External connector */
|
|
info->edev = devm_extcon_dev_allocate(&pdev->dev, max8997_extcon_cable);
|
|
if (IS_ERR(info->edev)) {
|
|
dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
|
|
ret = -ENOMEM;
|
|
goto err_irq;
|
|
}
|
|
info->edev->name = DEV_NAME;
|
|
|
|
ret = devm_extcon_dev_register(&pdev->dev, info->edev);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to register extcon device\n");
|
|
goto err_irq;
|
|
}
|
|
|
|
if (pdata && pdata->muic_pdata) {
|
|
struct max8997_muic_platform_data *muic_pdata
|
|
= pdata->muic_pdata;
|
|
|
|
/* Initialize registers according to platform data */
|
|
for (i = 0; i < muic_pdata->num_init_data; i++) {
|
|
max8997_write_reg(info->muic,
|
|
muic_pdata->init_data[i].addr,
|
|
muic_pdata->init_data[i].data);
|
|
}
|
|
|
|
/*
|
|
* Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
|
|
* h/w path of COMP2/COMN1 on CONTROL1 register.
|
|
*/
|
|
if (muic_pdata->path_uart)
|
|
info->path_uart = muic_pdata->path_uart;
|
|
else
|
|
info->path_uart = CONTROL1_SW_UART;
|
|
|
|
if (muic_pdata->path_usb)
|
|
info->path_usb = muic_pdata->path_usb;
|
|
else
|
|
info->path_usb = CONTROL1_SW_USB;
|
|
|
|
/*
|
|
* Default delay time for detecting cable state
|
|
* after certain time.
|
|
*/
|
|
if (muic_pdata->detcable_delay_ms)
|
|
delay_jiffies =
|
|
msecs_to_jiffies(muic_pdata->detcable_delay_ms);
|
|
else
|
|
delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
|
|
} else {
|
|
info->path_uart = CONTROL1_SW_UART;
|
|
info->path_usb = CONTROL1_SW_USB;
|
|
delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
|
|
}
|
|
|
|
/* Set initial path for UART */
|
|
max8997_muic_set_path(info, info->path_uart, true);
|
|
|
|
/* Set ADC debounce time */
|
|
max8997_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, max8997_muic_detect_cable_wq);
|
|
queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
|
|
delay_jiffies);
|
|
|
|
return 0;
|
|
|
|
err_irq:
|
|
while (--i >= 0)
|
|
free_irq(muic_irqs[i].virq, info);
|
|
return ret;
|
|
}
|
|
|
|
static int max8997_muic_remove(struct platform_device *pdev)
|
|
{
|
|
struct max8997_muic_info *info = platform_get_drvdata(pdev);
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
|
|
free_irq(muic_irqs[i].virq, info);
|
|
cancel_work_sync(&info->irq_work);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver max8997_muic_driver = {
|
|
.driver = {
|
|
.name = DEV_NAME,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = max8997_muic_probe,
|
|
.remove = max8997_muic_remove,
|
|
};
|
|
|
|
module_platform_driver(max8997_muic_driver);
|
|
|
|
MODULE_DESCRIPTION("Maxim MAX8997 Extcon driver");
|
|
MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>");
|
|
MODULE_LICENSE("GPL");
|