885 lines
24 KiB
C
885 lines
24 KiB
C
/*
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* extcon-max77843.c - Maxim MAX77843 extcon driver to support
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* MUIC(Micro USB Interface Controller)
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*
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* Copyright (C) 2015 Samsung Electronics
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* Author: Jaewon Kim <jaewon02.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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#include <linux/extcon.h>
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#include <linux/i2c.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/mfd/max77693-common.h>
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#include <linux/mfd/max77843-private.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/workqueue.h>
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#define DELAY_MS_DEFAULT 15000 /* unit: millisecond */
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enum max77843_muic_status {
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MAX77843_MUIC_STATUS1 = 0,
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MAX77843_MUIC_STATUS2,
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MAX77843_MUIC_STATUS3,
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MAX77843_MUIC_STATUS_NUM,
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};
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struct max77843_muic_info {
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struct device *dev;
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struct max77693_dev *max77843;
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struct extcon_dev *edev;
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struct mutex mutex;
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struct work_struct irq_work;
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struct delayed_work wq_detcable;
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u8 status[MAX77843_MUIC_STATUS_NUM];
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int prev_cable_type;
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int prev_chg_type;
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int prev_gnd_type;
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bool irq_adc;
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bool irq_chg;
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};
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enum max77843_muic_cable_group {
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MAX77843_CABLE_GROUP_ADC = 0,
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MAX77843_CABLE_GROUP_ADC_GND,
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MAX77843_CABLE_GROUP_CHG,
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};
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enum max77843_muic_adc_debounce_time {
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MAX77843_DEBOUNCE_TIME_5MS = 0,
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MAX77843_DEBOUNCE_TIME_10MS,
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MAX77843_DEBOUNCE_TIME_25MS,
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MAX77843_DEBOUNCE_TIME_38_62MS,
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};
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/* Define accessory cable type */
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enum max77843_muic_accessory_type {
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MAX77843_MUIC_ADC_GROUND = 0,
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MAX77843_MUIC_ADC_SEND_END_BUTTON,
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MAX77843_MUIC_ADC_REMOTE_S1_BUTTON,
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MAX77843_MUIC_ADC_REMOTE_S2_BUTTON,
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MAX77843_MUIC_ADC_REMOTE_S3_BUTTON,
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MAX77843_MUIC_ADC_REMOTE_S4_BUTTON,
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MAX77843_MUIC_ADC_REMOTE_S5_BUTTON,
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MAX77843_MUIC_ADC_REMOTE_S6_BUTTON,
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MAX77843_MUIC_ADC_REMOTE_S7_BUTTON,
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MAX77843_MUIC_ADC_REMOTE_S8_BUTTON,
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MAX77843_MUIC_ADC_REMOTE_S9_BUTTON,
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MAX77843_MUIC_ADC_REMOTE_S10_BUTTON,
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MAX77843_MUIC_ADC_REMOTE_S11_BUTTON,
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MAX77843_MUIC_ADC_REMOTE_S12_BUTTON,
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MAX77843_MUIC_ADC_RESERVED_ACC_1,
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MAX77843_MUIC_ADC_RESERVED_ACC_2,
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MAX77843_MUIC_ADC_RESERVED_ACC_3,
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MAX77843_MUIC_ADC_RESERVED_ACC_4,
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MAX77843_MUIC_ADC_RESERVED_ACC_5,
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MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2,
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MAX77843_MUIC_ADC_PHONE_POWERED_DEV,
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MAX77843_MUIC_ADC_TTY_CONVERTER,
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MAX77843_MUIC_ADC_UART_CABLE,
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MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG,
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MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF,
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MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON,
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MAX77843_MUIC_ADC_AV_CABLE_NOLOAD,
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MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG,
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MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF,
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MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON,
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MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1,
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MAX77843_MUIC_ADC_OPEN,
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/* The blow accessories should check
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not only ADC value but also ADC1K and VBVolt value. */
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/* Offset|ADC1K|VBVolt| */
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MAX77843_MUIC_GND_USB_HOST = 0x100, /* 0x1| 0| 0| */
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MAX77843_MUIC_GND_USB_HOST_VB = 0x101, /* 0x1| 0| 1| */
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MAX77843_MUIC_GND_MHL = 0x102, /* 0x1| 1| 0| */
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MAX77843_MUIC_GND_MHL_VB = 0x103, /* 0x1| 1| 1| */
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};
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/* Define charger cable type */
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enum max77843_muic_charger_type {
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MAX77843_MUIC_CHG_NONE = 0,
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MAX77843_MUIC_CHG_USB,
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MAX77843_MUIC_CHG_DOWNSTREAM,
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MAX77843_MUIC_CHG_DEDICATED,
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MAX77843_MUIC_CHG_SPECIAL_500MA,
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MAX77843_MUIC_CHG_SPECIAL_1A,
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MAX77843_MUIC_CHG_SPECIAL_BIAS,
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MAX77843_MUIC_CHG_RESERVED,
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MAX77843_MUIC_CHG_GND,
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};
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static const unsigned int max77843_extcon_cable[] = {
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EXTCON_USB,
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EXTCON_USB_HOST,
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EXTCON_CHG_USB_DCP,
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EXTCON_CHG_USB_CDP,
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EXTCON_CHG_USB_FAST,
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EXTCON_CHG_USB_SLOW,
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EXTCON_DISP_MHL,
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EXTCON_JIG,
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EXTCON_NONE,
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};
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struct max77843_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 max77843_muic_irq max77843_muic_irqs[] = {
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{ MAX77843_MUIC_IRQ_INT1_ADC, "MUIC-ADC" },
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{ MAX77843_MUIC_IRQ_INT1_ADCERROR, "MUIC-ADC_ERROR" },
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{ MAX77843_MUIC_IRQ_INT1_ADC1K, "MUIC-ADC1K" },
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{ MAX77843_MUIC_IRQ_INT2_CHGTYP, "MUIC-CHGTYP" },
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{ MAX77843_MUIC_IRQ_INT2_CHGDETRUN, "MUIC-CHGDETRUN" },
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{ MAX77843_MUIC_IRQ_INT2_DCDTMR, "MUIC-DCDTMR" },
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{ MAX77843_MUIC_IRQ_INT2_DXOVP, "MUIC-DXOVP" },
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{ MAX77843_MUIC_IRQ_INT2_VBVOLT, "MUIC-VBVOLT" },
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{ MAX77843_MUIC_IRQ_INT3_VBADC, "MUIC-VBADC" },
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{ MAX77843_MUIC_IRQ_INT3_VDNMON, "MUIC-VDNMON" },
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{ MAX77843_MUIC_IRQ_INT3_DNRES, "MUIC-DNRES" },
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{ MAX77843_MUIC_IRQ_INT3_MPNACK, "MUIC-MPNACK"},
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{ MAX77843_MUIC_IRQ_INT3_MRXBUFOW, "MUIC-MRXBUFOW"},
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{ MAX77843_MUIC_IRQ_INT3_MRXTRF, "MUIC-MRXTRF"},
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{ MAX77843_MUIC_IRQ_INT3_MRXPERR, "MUIC-MRXPERR"},
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{ MAX77843_MUIC_IRQ_INT3_MRXRDY, "MUIC-MRXRDY"},
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};
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static const struct regmap_config max77843_muic_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = MAX77843_MUIC_REG_END,
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};
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static const struct regmap_irq max77843_muic_irq[] = {
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/* INT1 interrupt */
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{ .reg_offset = 0, .mask = MAX77843_MUIC_ADC, },
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{ .reg_offset = 0, .mask = MAX77843_MUIC_ADCERROR, },
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{ .reg_offset = 0, .mask = MAX77843_MUIC_ADC1K, },
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/* INT2 interrupt */
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{ .reg_offset = 1, .mask = MAX77843_MUIC_CHGTYP, },
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{ .reg_offset = 1, .mask = MAX77843_MUIC_CHGDETRUN, },
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{ .reg_offset = 1, .mask = MAX77843_MUIC_DCDTMR, },
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{ .reg_offset = 1, .mask = MAX77843_MUIC_DXOVP, },
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{ .reg_offset = 1, .mask = MAX77843_MUIC_VBVOLT, },
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/* INT3 interrupt */
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{ .reg_offset = 2, .mask = MAX77843_MUIC_VBADC, },
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{ .reg_offset = 2, .mask = MAX77843_MUIC_VDNMON, },
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{ .reg_offset = 2, .mask = MAX77843_MUIC_DNRES, },
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{ .reg_offset = 2, .mask = MAX77843_MUIC_MPNACK, },
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{ .reg_offset = 2, .mask = MAX77843_MUIC_MRXBUFOW, },
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{ .reg_offset = 2, .mask = MAX77843_MUIC_MRXTRF, },
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{ .reg_offset = 2, .mask = MAX77843_MUIC_MRXPERR, },
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{ .reg_offset = 2, .mask = MAX77843_MUIC_MRXRDY, },
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};
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static const struct regmap_irq_chip max77843_muic_irq_chip = {
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.name = "max77843-muic",
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.status_base = MAX77843_MUIC_REG_INT1,
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.mask_base = MAX77843_MUIC_REG_INTMASK1,
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.mask_invert = true,
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.num_regs = 3,
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.irqs = max77843_muic_irq,
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.num_irqs = ARRAY_SIZE(max77843_muic_irq),
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};
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static int max77843_muic_set_path(struct max77843_muic_info *info,
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u8 val, bool attached)
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{
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struct max77693_dev *max77843 = info->max77843;
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int ret = 0;
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unsigned int ctrl1, ctrl2;
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if (attached)
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ctrl1 = val;
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else
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ctrl1 = MAX77843_MUIC_CONTROL1_SW_OPEN;
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ret = regmap_update_bits(max77843->regmap_muic,
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MAX77843_MUIC_REG_CONTROL1,
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MAX77843_MUIC_CONTROL1_COM_SW, ctrl1);
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if (ret < 0) {
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dev_err(info->dev, "Cannot switch MUIC port\n");
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return ret;
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}
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if (attached)
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ctrl2 = MAX77843_MUIC_CONTROL2_CPEN_MASK;
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else
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ctrl2 = MAX77843_MUIC_CONTROL2_LOWPWR_MASK;
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ret = regmap_update_bits(max77843->regmap_muic,
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MAX77843_MUIC_REG_CONTROL2,
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MAX77843_MUIC_CONTROL2_LOWPWR_MASK |
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MAX77843_MUIC_CONTROL2_CPEN_MASK, ctrl2);
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if (ret < 0) {
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dev_err(info->dev, "Cannot update lowpower mode\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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static int max77843_muic_get_cable_type(struct max77843_muic_info *info,
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enum max77843_muic_cable_group group, bool *attached)
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{
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int adc, chg_type, cable_type, gnd_type;
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adc = info->status[MAX77843_MUIC_STATUS1] &
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MAX77843_MUIC_STATUS1_ADC_MASK;
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adc >>= MAX77843_MUIC_STATUS1_ADC_SHIFT;
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switch (group) {
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case MAX77843_CABLE_GROUP_ADC:
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if (adc == MAX77843_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 = MAX77843_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 MAX77843_CABLE_GROUP_CHG:
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chg_type = info->status[MAX77843_MUIC_STATUS2] &
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MAX77843_MUIC_STATUS2_CHGTYP_MASK;
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/* Check GROUND accessory with charger cable */
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if (adc == MAX77843_MUIC_ADC_GROUND) {
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if (chg_type == MAX77843_MUIC_CHG_NONE) {
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/* The following state when charger cable is
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* disconnected but the GROUND accessory still
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* connected */
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*attached = false;
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cable_type = info->prev_chg_type;
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info->prev_chg_type = MAX77843_MUIC_CHG_NONE;
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} else {
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/* The following state when charger cable is
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* connected on the GROUND accessory */
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*attached = true;
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cable_type = MAX77843_MUIC_CHG_GND;
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info->prev_chg_type = MAX77843_MUIC_CHG_GND;
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}
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break;
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}
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if (chg_type == MAX77843_MUIC_CHG_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 = MAX77843_MUIC_CHG_NONE;
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} else {
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*attached = true;
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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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case MAX77843_CABLE_GROUP_ADC_GND:
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if (adc == MAX77843_MUIC_ADC_OPEN) {
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*attached = false;
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cable_type = info->prev_gnd_type;
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info->prev_gnd_type = MAX77843_MUIC_ADC_OPEN;
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} else {
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*attached = true;
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/* Offset|ADC1K|VBVolt|
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* 0x1| 0| 0| USB-HOST
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* 0x1| 0| 1| USB-HOST with VB
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* 0x1| 1| 0| MHL
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* 0x1| 1| 1| MHL with VB */
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/* Get ADC1K register bit */
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gnd_type = (info->status[MAX77843_MUIC_STATUS1] &
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MAX77843_MUIC_STATUS1_ADC1K_MASK);
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/* Get VBVolt register bit */
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gnd_type |= (info->status[MAX77843_MUIC_STATUS2] &
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MAX77843_MUIC_STATUS2_VBVOLT_MASK);
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gnd_type >>= MAX77843_MUIC_STATUS2_VBVOLT_SHIFT;
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/* Offset of GND cable */
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gnd_type |= MAX77843_MUIC_GND_USB_HOST;
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cable_type = info->prev_gnd_type = gnd_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 max77843_muic_adc_gnd_handler(struct max77843_muic_info *info)
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{
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int ret, gnd_cable_type;
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bool attached;
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gnd_cable_type = max77843_muic_get_cable_type(info,
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MAX77843_CABLE_GROUP_ADC_GND, &attached);
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dev_dbg(info->dev, "external connector is %s (gnd:0x%02x)\n",
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attached ? "attached" : "detached", gnd_cable_type);
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switch (gnd_cable_type) {
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case MAX77843_MUIC_GND_USB_HOST:
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case MAX77843_MUIC_GND_USB_HOST_VB:
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ret = max77843_muic_set_path(info,
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MAX77843_MUIC_CONTROL1_SW_USB,
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attached);
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if (ret < 0)
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return ret;
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extcon_set_cable_state_(info->edev, EXTCON_USB_HOST, attached);
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break;
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case MAX77843_MUIC_GND_MHL_VB:
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case MAX77843_MUIC_GND_MHL:
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ret = max77843_muic_set_path(info,
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MAX77843_MUIC_CONTROL1_SW_OPEN,
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attached);
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if (ret < 0)
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return ret;
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extcon_set_cable_state_(info->edev, EXTCON_DISP_MHL, attached);
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break;
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default:
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dev_err(info->dev, "failed to detect %s accessory(gnd:0x%x)\n",
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attached ? "attached" : "detached", gnd_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 max77843_muic_jig_handler(struct max77843_muic_info *info,
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int cable_type, bool attached)
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{
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int ret;
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u8 path = MAX77843_MUIC_CONTROL1_SW_OPEN;
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dev_dbg(info->dev, "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 MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF:
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case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON:
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path = MAX77843_MUIC_CONTROL1_SW_USB;
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break;
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case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF:
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path = MAX77843_MUIC_CONTROL1_SW_UART;
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break;
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default:
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return -EINVAL;
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}
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ret = max77843_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_cable_state_(info->edev, EXTCON_JIG, attached);
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return 0;
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}
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static int max77843_muic_adc_handler(struct max77843_muic_info *info)
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{
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int ret, cable_type;
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bool attached;
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cable_type = max77843_muic_get_cable_type(info,
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MAX77843_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 MAX77843_MUIC_ADC_GROUND:
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ret = max77843_muic_adc_gnd_handler(info);
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if (ret < 0)
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return ret;
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break;
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case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF:
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case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON:
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case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF:
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ret = max77843_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 MAX77843_MUIC_ADC_SEND_END_BUTTON:
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case MAX77843_MUIC_ADC_REMOTE_S1_BUTTON:
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case MAX77843_MUIC_ADC_REMOTE_S2_BUTTON:
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case MAX77843_MUIC_ADC_REMOTE_S3_BUTTON:
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case MAX77843_MUIC_ADC_REMOTE_S4_BUTTON:
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case MAX77843_MUIC_ADC_REMOTE_S5_BUTTON:
|
|
case MAX77843_MUIC_ADC_REMOTE_S6_BUTTON:
|
|
case MAX77843_MUIC_ADC_REMOTE_S7_BUTTON:
|
|
case MAX77843_MUIC_ADC_REMOTE_S8_BUTTON:
|
|
case MAX77843_MUIC_ADC_REMOTE_S9_BUTTON:
|
|
case MAX77843_MUIC_ADC_REMOTE_S10_BUTTON:
|
|
case MAX77843_MUIC_ADC_REMOTE_S11_BUTTON:
|
|
case MAX77843_MUIC_ADC_REMOTE_S12_BUTTON:
|
|
case MAX77843_MUIC_ADC_RESERVED_ACC_1:
|
|
case MAX77843_MUIC_ADC_RESERVED_ACC_2:
|
|
case MAX77843_MUIC_ADC_RESERVED_ACC_3:
|
|
case MAX77843_MUIC_ADC_RESERVED_ACC_4:
|
|
case MAX77843_MUIC_ADC_RESERVED_ACC_5:
|
|
case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2:
|
|
case MAX77843_MUIC_ADC_PHONE_POWERED_DEV:
|
|
case MAX77843_MUIC_ADC_TTY_CONVERTER:
|
|
case MAX77843_MUIC_ADC_UART_CABLE:
|
|
case MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG:
|
|
case MAX77843_MUIC_ADC_AV_CABLE_NOLOAD:
|
|
case MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG:
|
|
case MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON:
|
|
case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1:
|
|
case MAX77843_MUIC_ADC_OPEN:
|
|
dev_err(info->dev,
|
|
"accessory is %s but it isn't used (adc:0x%x)\n",
|
|
attached ? "attached" : "detached", cable_type);
|
|
return -EAGAIN;
|
|
default:
|
|
dev_err(info->dev,
|
|
"failed to detect %s accessory (adc:0x%x)\n",
|
|
attached ? "attached" : "detached", cable_type);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int max77843_muic_chg_handler(struct max77843_muic_info *info)
|
|
{
|
|
int ret, chg_type, gnd_type;
|
|
bool attached;
|
|
|
|
chg_type = max77843_muic_get_cable_type(info,
|
|
MAX77843_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 MAX77843_MUIC_CHG_USB:
|
|
ret = max77843_muic_set_path(info,
|
|
MAX77843_MUIC_CONTROL1_SW_USB,
|
|
attached);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
extcon_set_cable_state_(info->edev, EXTCON_USB, attached);
|
|
break;
|
|
case MAX77843_MUIC_CHG_DOWNSTREAM:
|
|
ret = max77843_muic_set_path(info,
|
|
MAX77843_MUIC_CONTROL1_SW_OPEN,
|
|
attached);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
extcon_set_cable_state_(info->edev, EXTCON_CHG_USB_CDP,
|
|
attached);
|
|
break;
|
|
case MAX77843_MUIC_CHG_DEDICATED:
|
|
ret = max77843_muic_set_path(info,
|
|
MAX77843_MUIC_CONTROL1_SW_OPEN,
|
|
attached);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
extcon_set_cable_state_(info->edev, EXTCON_CHG_USB_DCP,
|
|
attached);
|
|
break;
|
|
case MAX77843_MUIC_CHG_SPECIAL_500MA:
|
|
ret = max77843_muic_set_path(info,
|
|
MAX77843_MUIC_CONTROL1_SW_OPEN,
|
|
attached);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
extcon_set_cable_state_(info->edev, EXTCON_CHG_USB_SLOW,
|
|
attached);
|
|
break;
|
|
case MAX77843_MUIC_CHG_SPECIAL_1A:
|
|
ret = max77843_muic_set_path(info,
|
|
MAX77843_MUIC_CONTROL1_SW_OPEN,
|
|
attached);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
extcon_set_cable_state_(info->edev, EXTCON_CHG_USB_FAST,
|
|
attached);
|
|
break;
|
|
case MAX77843_MUIC_CHG_GND:
|
|
gnd_type = max77843_muic_get_cable_type(info,
|
|
MAX77843_CABLE_GROUP_ADC_GND, &attached);
|
|
|
|
/* Charger cable on MHL accessory is attach or detach */
|
|
if (gnd_type == MAX77843_MUIC_GND_MHL_VB)
|
|
extcon_set_cable_state_(info->edev, EXTCON_CHG_USB_DCP,
|
|
true);
|
|
else if (gnd_type == MAX77843_MUIC_GND_MHL)
|
|
extcon_set_cable_state_(info->edev, EXTCON_CHG_USB_DCP,
|
|
false);
|
|
break;
|
|
case MAX77843_MUIC_CHG_NONE:
|
|
break;
|
|
default:
|
|
dev_err(info->dev,
|
|
"failed to detect %s accessory (chg_type:0x%x)\n",
|
|
attached ? "attached" : "detached", chg_type);
|
|
|
|
max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_OPEN,
|
|
attached);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void max77843_muic_irq_work(struct work_struct *work)
|
|
{
|
|
struct max77843_muic_info *info = container_of(work,
|
|
struct max77843_muic_info, irq_work);
|
|
struct max77693_dev *max77843 = info->max77843;
|
|
int ret = 0;
|
|
|
|
mutex_lock(&info->mutex);
|
|
|
|
ret = regmap_bulk_read(max77843->regmap_muic,
|
|
MAX77843_MUIC_REG_STATUS1, info->status,
|
|
MAX77843_MUIC_STATUS_NUM);
|
|
if (ret) {
|
|
dev_err(info->dev, "Cannot read STATUS registers\n");
|
|
mutex_unlock(&info->mutex);
|
|
return;
|
|
}
|
|
|
|
if (info->irq_adc) {
|
|
ret = max77843_muic_adc_handler(info);
|
|
if (ret)
|
|
dev_err(info->dev, "Unknown cable type\n");
|
|
info->irq_adc = false;
|
|
}
|
|
|
|
if (info->irq_chg) {
|
|
ret = max77843_muic_chg_handler(info);
|
|
if (ret)
|
|
dev_err(info->dev, "Unknown charger type\n");
|
|
info->irq_chg = false;
|
|
}
|
|
|
|
mutex_unlock(&info->mutex);
|
|
}
|
|
|
|
static irqreturn_t max77843_muic_irq_handler(int irq, void *data)
|
|
{
|
|
struct max77843_muic_info *info = data;
|
|
int i, irq_type = -1;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++)
|
|
if (irq == max77843_muic_irqs[i].virq)
|
|
irq_type = max77843_muic_irqs[i].irq;
|
|
|
|
switch (irq_type) {
|
|
case MAX77843_MUIC_IRQ_INT1_ADC:
|
|
case MAX77843_MUIC_IRQ_INT1_ADCERROR:
|
|
case MAX77843_MUIC_IRQ_INT1_ADC1K:
|
|
info->irq_adc = true;
|
|
break;
|
|
case MAX77843_MUIC_IRQ_INT2_CHGTYP:
|
|
case MAX77843_MUIC_IRQ_INT2_CHGDETRUN:
|
|
case MAX77843_MUIC_IRQ_INT2_DCDTMR:
|
|
case MAX77843_MUIC_IRQ_INT2_DXOVP:
|
|
case MAX77843_MUIC_IRQ_INT2_VBVOLT:
|
|
info->irq_chg = true;
|
|
break;
|
|
case MAX77843_MUIC_IRQ_INT3_VBADC:
|
|
case MAX77843_MUIC_IRQ_INT3_VDNMON:
|
|
case MAX77843_MUIC_IRQ_INT3_DNRES:
|
|
case MAX77843_MUIC_IRQ_INT3_MPNACK:
|
|
case MAX77843_MUIC_IRQ_INT3_MRXBUFOW:
|
|
case MAX77843_MUIC_IRQ_INT3_MRXTRF:
|
|
case MAX77843_MUIC_IRQ_INT3_MRXPERR:
|
|
case MAX77843_MUIC_IRQ_INT3_MRXRDY:
|
|
break;
|
|
default:
|
|
dev_err(info->dev, "Cannot recognize IRQ(%d)\n", irq_type);
|
|
break;
|
|
}
|
|
|
|
schedule_work(&info->irq_work);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static void max77843_muic_detect_cable_wq(struct work_struct *work)
|
|
{
|
|
struct max77843_muic_info *info = container_of(to_delayed_work(work),
|
|
struct max77843_muic_info, wq_detcable);
|
|
struct max77693_dev *max77843 = info->max77843;
|
|
int chg_type, adc, ret;
|
|
bool attached;
|
|
|
|
mutex_lock(&info->mutex);
|
|
|
|
ret = regmap_bulk_read(max77843->regmap_muic,
|
|
MAX77843_MUIC_REG_STATUS1, info->status,
|
|
MAX77843_MUIC_STATUS_NUM);
|
|
if (ret) {
|
|
dev_err(info->dev, "Cannot read STATUS registers\n");
|
|
goto err_cable_wq;
|
|
}
|
|
|
|
adc = max77843_muic_get_cable_type(info,
|
|
MAX77843_CABLE_GROUP_ADC, &attached);
|
|
if (attached && adc != MAX77843_MUIC_ADC_OPEN) {
|
|
ret = max77843_muic_adc_handler(info);
|
|
if (ret < 0) {
|
|
dev_err(info->dev, "Cannot detect accessory\n");
|
|
goto err_cable_wq;
|
|
}
|
|
}
|
|
|
|
chg_type = max77843_muic_get_cable_type(info,
|
|
MAX77843_CABLE_GROUP_CHG, &attached);
|
|
if (attached && chg_type != MAX77843_MUIC_CHG_NONE) {
|
|
ret = max77843_muic_chg_handler(info);
|
|
if (ret < 0) {
|
|
dev_err(info->dev, "Cannot detect charger accessory\n");
|
|
goto err_cable_wq;
|
|
}
|
|
}
|
|
|
|
err_cable_wq:
|
|
mutex_unlock(&info->mutex);
|
|
}
|
|
|
|
static int max77843_muic_set_debounce_time(struct max77843_muic_info *info,
|
|
enum max77843_muic_adc_debounce_time time)
|
|
{
|
|
struct max77693_dev *max77843 = info->max77843;
|
|
int ret;
|
|
|
|
switch (time) {
|
|
case MAX77843_DEBOUNCE_TIME_5MS:
|
|
case MAX77843_DEBOUNCE_TIME_10MS:
|
|
case MAX77843_DEBOUNCE_TIME_25MS:
|
|
case MAX77843_DEBOUNCE_TIME_38_62MS:
|
|
ret = regmap_update_bits(max77843->regmap_muic,
|
|
MAX77843_MUIC_REG_CONTROL4,
|
|
MAX77843_MUIC_CONTROL4_ADCDBSET_MASK,
|
|
time << MAX77843_MUIC_CONTROL4_ADCDBSET_SHIFT);
|
|
if (ret < 0) {
|
|
dev_err(info->dev, "Cannot write MUIC regmap\n");
|
|
return ret;
|
|
}
|
|
break;
|
|
default:
|
|
dev_err(info->dev, "Invalid ADC debounce time\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int max77843_init_muic_regmap(struct max77693_dev *max77843)
|
|
{
|
|
int ret;
|
|
|
|
max77843->i2c_muic = i2c_new_dummy(max77843->i2c->adapter,
|
|
I2C_ADDR_MUIC);
|
|
if (!max77843->i2c_muic) {
|
|
dev_err(&max77843->i2c->dev,
|
|
"Cannot allocate I2C device for MUIC\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
i2c_set_clientdata(max77843->i2c_muic, max77843);
|
|
|
|
max77843->regmap_muic = devm_regmap_init_i2c(max77843->i2c_muic,
|
|
&max77843_muic_regmap_config);
|
|
if (IS_ERR(max77843->regmap_muic)) {
|
|
ret = PTR_ERR(max77843->regmap_muic);
|
|
goto err_muic_i2c;
|
|
}
|
|
|
|
ret = regmap_add_irq_chip(max77843->regmap_muic, max77843->irq,
|
|
IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED,
|
|
0, &max77843_muic_irq_chip, &max77843->irq_data_muic);
|
|
if (ret < 0) {
|
|
dev_err(&max77843->i2c->dev, "Cannot add MUIC IRQ chip\n");
|
|
goto err_muic_i2c;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_muic_i2c:
|
|
i2c_unregister_device(max77843->i2c_muic);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int max77843_muic_probe(struct platform_device *pdev)
|
|
{
|
|
struct max77693_dev *max77843 = dev_get_drvdata(pdev->dev.parent);
|
|
struct max77843_muic_info *info;
|
|
unsigned int id;
|
|
int i, ret;
|
|
|
|
info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
|
|
if (!info)
|
|
return -ENOMEM;
|
|
|
|
info->dev = &pdev->dev;
|
|
info->max77843 = max77843;
|
|
|
|
platform_set_drvdata(pdev, info);
|
|
mutex_init(&info->mutex);
|
|
|
|
/* Initialize i2c and regmap */
|
|
ret = max77843_init_muic_regmap(max77843);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Failed to init MUIC regmap\n");
|
|
return ret;
|
|
}
|
|
|
|
/* Turn off auto detection configuration */
|
|
ret = regmap_update_bits(max77843->regmap_muic,
|
|
MAX77843_MUIC_REG_CONTROL4,
|
|
MAX77843_MUIC_CONTROL4_USBAUTO_MASK |
|
|
MAX77843_MUIC_CONTROL4_FCTAUTO_MASK,
|
|
CONTROL4_AUTO_DISABLE);
|
|
|
|
/* Initialize extcon device */
|
|
info->edev = devm_extcon_dev_allocate(&pdev->dev,
|
|
max77843_extcon_cable);
|
|
if (IS_ERR(info->edev)) {
|
|
dev_err(&pdev->dev, "Failed to allocate memory for extcon\n");
|
|
ret = -ENODEV;
|
|
goto err_muic_irq;
|
|
}
|
|
|
|
ret = devm_extcon_dev_register(&pdev->dev, info->edev);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Failed to register extcon device\n");
|
|
goto err_muic_irq;
|
|
}
|
|
|
|
/* Set ADC debounce time */
|
|
max77843_muic_set_debounce_time(info, MAX77843_DEBOUNCE_TIME_25MS);
|
|
|
|
/* Set initial path for UART */
|
|
max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_UART, true);
|
|
|
|
/* Check revision number of MUIC device */
|
|
ret = regmap_read(max77843->regmap_muic, MAX77843_MUIC_REG_ID, &id);
|
|
if (ret < 0) {
|
|
dev_err(&pdev->dev, "Failed to read revision number\n");
|
|
goto err_muic_irq;
|
|
}
|
|
dev_info(info->dev, "MUIC device ID : 0x%x\n", id);
|
|
|
|
/* Support virtual irq domain for max77843 MUIC device */
|
|
INIT_WORK(&info->irq_work, max77843_muic_irq_work);
|
|
|
|
/* Clear IRQ bits before request IRQs */
|
|
ret = regmap_bulk_read(max77843->regmap_muic,
|
|
MAX77843_MUIC_REG_INT1, info->status,
|
|
MAX77843_MUIC_IRQ_NUM);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Failed to Clear IRQ bits\n");
|
|
goto err_muic_irq;
|
|
}
|
|
|
|
for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) {
|
|
struct max77843_muic_irq *muic_irq = &max77843_muic_irqs[i];
|
|
int virq = 0;
|
|
|
|
virq = regmap_irq_get_virq(max77843->irq_data_muic,
|
|
muic_irq->irq);
|
|
if (virq <= 0) {
|
|
ret = -EINVAL;
|
|
goto err_muic_irq;
|
|
}
|
|
muic_irq->virq = virq;
|
|
|
|
ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
|
|
max77843_muic_irq_handler, IRQF_NO_SUSPEND,
|
|
muic_irq->name, info);
|
|
if (ret) {
|
|
dev_err(&pdev->dev,
|
|
"Failed to request irq (IRQ: %d, error: %d)\n",
|
|
muic_irq->irq, ret);
|
|
goto err_muic_irq;
|
|
}
|
|
}
|
|
|
|
/* Detect accessory after completing the initialization of platform */
|
|
INIT_DELAYED_WORK(&info->wq_detcable, max77843_muic_detect_cable_wq);
|
|
queue_delayed_work(system_power_efficient_wq,
|
|
&info->wq_detcable, msecs_to_jiffies(DELAY_MS_DEFAULT));
|
|
|
|
return 0;
|
|
|
|
err_muic_irq:
|
|
regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic);
|
|
i2c_unregister_device(max77843->i2c_muic);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int max77843_muic_remove(struct platform_device *pdev)
|
|
{
|
|
struct max77843_muic_info *info = platform_get_drvdata(pdev);
|
|
struct max77693_dev *max77843 = info->max77843;
|
|
|
|
cancel_work_sync(&info->irq_work);
|
|
regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic);
|
|
i2c_unregister_device(max77843->i2c_muic);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct platform_device_id max77843_muic_id[] = {
|
|
{ "max77843-muic", },
|
|
{ /* sentinel */ },
|
|
};
|
|
MODULE_DEVICE_TABLE(platform, max77843_muic_id);
|
|
|
|
static struct platform_driver max77843_muic_driver = {
|
|
.driver = {
|
|
.name = "max77843-muic",
|
|
},
|
|
.probe = max77843_muic_probe,
|
|
.remove = max77843_muic_remove,
|
|
.id_table = max77843_muic_id,
|
|
};
|
|
|
|
static int __init max77843_muic_init(void)
|
|
{
|
|
return platform_driver_register(&max77843_muic_driver);
|
|
}
|
|
subsys_initcall(max77843_muic_init);
|
|
|
|
MODULE_DESCRIPTION("Maxim MAX77843 Extcon driver");
|
|
MODULE_AUTHOR("Jaewon Kim <jaewon02.kim@samsung.com>");
|
|
MODULE_LICENSE("GPL");
|