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1273 lines
36 KiB
1273 lines
36 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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// |
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// extcon-max77693.c - MAX77693 extcon driver to support MAX77693 MUIC |
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// |
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// Copyright (C) 2012 Samsung Electrnoics |
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// Chanwoo Choi <[email protected]> |
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#include <linux/devm-helpers.h> |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/i2c.h> |
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#include <linux/slab.h> |
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#include <linux/input.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/mfd/max77693.h> |
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#include <linux/mfd/max77693-common.h> |
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#include <linux/mfd/max77693-private.h> |
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#include <linux/extcon-provider.h> |
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#include <linux/regmap.h> |
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#include <linux/irqdomain.h> |
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#define DEV_NAME "max77693-muic" |
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#define DELAY_MS_DEFAULT 20000 /* unit: millisecond */ |
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/* |
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* Default value of MAX77693 register to bring up MUIC device. |
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* If user don't set some initial value for MUIC device through platform data, |
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* extcon-max77693 driver use 'default_init_data' to bring up base operation |
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* of MAX77693 MUIC device. |
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*/ |
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static struct max77693_reg_data default_init_data[] = { |
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{ |
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/* STATUS2 - [3]ChgDetRun */ |
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.addr = MAX77693_MUIC_REG_STATUS2, |
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.data = MAX77693_STATUS2_CHGDETRUN_MASK, |
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}, { |
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/* INTMASK1 - Unmask [3]ADC1KM,[0]ADCM */ |
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.addr = MAX77693_MUIC_REG_INTMASK1, |
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.data = INTMASK1_ADC1K_MASK |
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| INTMASK1_ADC_MASK, |
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}, { |
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/* INTMASK2 - Unmask [0]ChgTypM */ |
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.addr = MAX77693_MUIC_REG_INTMASK2, |
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.data = INTMASK2_CHGTYP_MASK, |
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}, { |
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/* INTMASK3 - Mask all of interrupts */ |
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.addr = MAX77693_MUIC_REG_INTMASK3, |
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.data = 0x0, |
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}, { |
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/* CDETCTRL2 */ |
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.addr = MAX77693_MUIC_REG_CDETCTRL2, |
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.data = CDETCTRL2_VIDRMEN_MASK |
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| CDETCTRL2_DXOVPEN_MASK, |
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}, |
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}; |
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enum max77693_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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struct max77693_muic_info { |
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struct device *dev; |
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struct max77693_dev *max77693; |
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struct extcon_dev *edev; |
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int prev_cable_type; |
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int prev_cable_type_gnd; |
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int prev_chg_type; |
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int prev_button_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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/* |
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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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/* Button of dock device */ |
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struct input_dev *dock; |
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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 max77693_muic_cable_group { |
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MAX77693_CABLE_GROUP_ADC = 0, |
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MAX77693_CABLE_GROUP_ADC_GND, |
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MAX77693_CABLE_GROUP_CHG, |
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MAX77693_CABLE_GROUP_VBVOLT, |
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}; |
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enum max77693_muic_charger_type { |
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MAX77693_CHARGER_TYPE_NONE = 0, |
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MAX77693_CHARGER_TYPE_USB, |
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MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT, |
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MAX77693_CHARGER_TYPE_DEDICATED_CHG, |
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MAX77693_CHARGER_TYPE_APPLE_500MA, |
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MAX77693_CHARGER_TYPE_APPLE_1A_2A, |
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MAX77693_CHARGER_TYPE_DEAD_BATTERY = 7, |
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}; |
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/** |
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* struct max77693_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 max77693_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 max77693_muic_irq muic_irqs[] = { |
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{ MAX77693_MUIC_IRQ_INT1_ADC, "muic-ADC" }, |
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{ MAX77693_MUIC_IRQ_INT1_ADC_LOW, "muic-ADCLOW" }, |
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{ MAX77693_MUIC_IRQ_INT1_ADC_ERR, "muic-ADCError" }, |
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{ MAX77693_MUIC_IRQ_INT1_ADC1K, "muic-ADC1K" }, |
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{ MAX77693_MUIC_IRQ_INT2_CHGTYP, "muic-CHGTYP" }, |
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{ MAX77693_MUIC_IRQ_INT2_CHGDETREUN, "muic-CHGDETREUN" }, |
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{ MAX77693_MUIC_IRQ_INT2_DCDTMR, "muic-DCDTMR" }, |
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{ MAX77693_MUIC_IRQ_INT2_DXOVP, "muic-DXOVP" }, |
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{ MAX77693_MUIC_IRQ_INT2_VBVOLT, "muic-VBVOLT" }, |
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{ MAX77693_MUIC_IRQ_INT2_VIDRM, "muic-VIDRM" }, |
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{ MAX77693_MUIC_IRQ_INT3_EOC, "muic-EOC" }, |
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{ MAX77693_MUIC_IRQ_INT3_CGMBC, "muic-CGMBC" }, |
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{ MAX77693_MUIC_IRQ_INT3_OVP, "muic-OVP" }, |
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{ MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR, "muic-MBCCHG_ERR" }, |
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{ MAX77693_MUIC_IRQ_INT3_CHG_ENABLED, "muic-CHG_ENABLED" }, |
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{ MAX77693_MUIC_IRQ_INT3_BAT_DET, "muic-BAT_DET" }, |
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}; |
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/* Define supported accessory type */ |
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enum max77693_muic_acc_type { |
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MAX77693_MUIC_ADC_GROUND = 0x0, |
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MAX77693_MUIC_ADC_SEND_END_BUTTON, |
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MAX77693_MUIC_ADC_REMOTE_S1_BUTTON, |
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MAX77693_MUIC_ADC_REMOTE_S2_BUTTON, |
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MAX77693_MUIC_ADC_REMOTE_S3_BUTTON, |
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MAX77693_MUIC_ADC_REMOTE_S4_BUTTON, |
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MAX77693_MUIC_ADC_REMOTE_S5_BUTTON, |
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MAX77693_MUIC_ADC_REMOTE_S6_BUTTON, |
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MAX77693_MUIC_ADC_REMOTE_S7_BUTTON, |
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MAX77693_MUIC_ADC_REMOTE_S8_BUTTON, |
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MAX77693_MUIC_ADC_REMOTE_S9_BUTTON, |
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MAX77693_MUIC_ADC_REMOTE_S10_BUTTON, |
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MAX77693_MUIC_ADC_REMOTE_S11_BUTTON, |
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MAX77693_MUIC_ADC_REMOTE_S12_BUTTON, |
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MAX77693_MUIC_ADC_RESERVED_ACC_1, |
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MAX77693_MUIC_ADC_RESERVED_ACC_2, |
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MAX77693_MUIC_ADC_RESERVED_ACC_3, |
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MAX77693_MUIC_ADC_RESERVED_ACC_4, |
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MAX77693_MUIC_ADC_RESERVED_ACC_5, |
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MAX77693_MUIC_ADC_CEA936_AUDIO, |
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MAX77693_MUIC_ADC_PHONE_POWERED_DEV, |
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MAX77693_MUIC_ADC_TTY_CONVERTER, |
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MAX77693_MUIC_ADC_UART_CABLE, |
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MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG, |
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MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF, |
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MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON, |
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MAX77693_MUIC_ADC_AV_CABLE_NOLOAD, |
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MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG, |
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MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF, |
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MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON, |
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MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE, |
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MAX77693_MUIC_ADC_OPEN, |
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/* |
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* The below accessories have same ADC value so ADCLow and |
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* ADC1K bit is used to separate specific accessory. |
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*/ |
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/* ADC|VBVolot|ADCLow|ADC1K| */ |
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MAX77693_MUIC_GND_USB_HOST = 0x100, /* 0x0| 0| 0| 0| */ |
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MAX77693_MUIC_GND_USB_HOST_VB = 0x104, /* 0x0| 1| 0| 0| */ |
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MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* 0x0| 0| 1| 0| */ |
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MAX77693_MUIC_GND_MHL = 0x103, /* 0x0| 0| 1| 1| */ |
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MAX77693_MUIC_GND_MHL_VB = 0x107, /* 0x0| 1| 1| 1| */ |
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}; |
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/* |
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* MAX77693 MUIC device support below list of accessories(external connector) |
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*/ |
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static const unsigned int max77693_extcon_cable[] = { |
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EXTCON_USB, |
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EXTCON_USB_HOST, |
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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_DISP_MHL, |
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EXTCON_JIG, |
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EXTCON_DOCK, |
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EXTCON_NONE, |
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}; |
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/* |
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* max77693_muic_set_debounce_time - Set the debounce time of ADC |
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* @info: the instance including private data of max77693 MUIC |
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* @time: the debounce time of ADC |
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*/ |
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static int max77693_muic_set_debounce_time(struct max77693_muic_info *info, |
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enum max77693_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_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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/* |
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* Don't touch BTLDset, JIGset when you want to change adc |
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* debounce time. If it writes other than 0 to BTLDset, JIGset |
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* muic device will be reset and loose current state. |
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*/ |
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ret = regmap_write(info->max77693->regmap_muic, |
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MAX77693_MUIC_REG_CTRL3, |
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time << MAX77693_CONTROL3_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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* max77693_muic_set_path - Set hardware line according to attached cable |
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* @info: the instance including private data of max77693 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 max77693 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 max77693_muic_set_path(struct max77693_muic_info *info, |
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u8 val, bool attached) |
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{ |
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int ret; |
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unsigned int 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 = MAX77693_CONTROL1_SW_OPEN; |
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ret = regmap_update_bits(info->max77693->regmap_muic, |
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MAX77693_MUIC_REG_CTRL1, COMP_SW_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 |= MAX77693_CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */ |
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else |
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ctrl2 |= MAX77693_CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */ |
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ret = regmap_update_bits(info->max77693->regmap_muic, |
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MAX77693_MUIC_REG_CTRL2, |
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MAX77693_CONTROL2_LOWPWR_MASK | MAX77693_CONTROL2_CPEN_MASK, |
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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_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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* max77693_muic_get_cable_type - Return cable type and check cable state |
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* @info: the instance including private data of max77693 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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* - MAX77693_CABLE_GROUP_ADC |
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* - MAX77693_CABLE_GROUP_ADC_GND |
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* - MAX77693_CABLE_GROUP_CHG |
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* - MAX77693_CABLE_GROUP_VBVOLT |
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*/ |
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static int max77693_muic_get_cable_type(struct max77693_muic_info *info, |
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enum max77693_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 adc1k; |
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int adclow; |
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int vbvolt; |
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int chg_type; |
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switch (group) { |
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case MAX77693_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] & MAX77693_STATUS1_ADC_MASK; |
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adc >>= MAX77693_STATUS1_ADC_SHIFT; |
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|
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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 == MAX77693_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 = MAX77693_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 MAX77693_CABLE_GROUP_ADC_GND: |
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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] & MAX77693_STATUS1_ADC_MASK; |
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adc >>= MAX77693_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/_gnd) for handling cable when cable |
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* is detached. |
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*/ |
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if (adc == MAX77693_MUIC_ADC_OPEN) { |
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*attached = false; |
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cable_type = info->prev_cable_type_gnd; |
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info->prev_cable_type_gnd = MAX77693_MUIC_ADC_OPEN; |
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} else { |
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*attached = true; |
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adclow = info->status[0] & MAX77693_STATUS1_ADCLOW_MASK; |
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adclow >>= MAX77693_STATUS1_ADCLOW_SHIFT; |
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adc1k = info->status[0] & MAX77693_STATUS1_ADC1K_MASK; |
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adc1k >>= MAX77693_STATUS1_ADC1K_SHIFT; |
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vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK; |
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vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT; |
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/** |
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* [0x1|VBVolt|ADCLow|ADC1K] |
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* [0x1| 0| 0| 0] USB_HOST |
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* [0x1| 1| 0| 0] USB_HSOT_VB |
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* [0x1| 0| 1| 0] Audio Video cable with load |
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* [0x1| 0| 1| 1] MHL without charging cable |
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* [0x1| 1| 1| 1] MHL with charging cable |
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*/ |
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cable_type = ((0x1 << 8) |
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| (vbvolt << 2) |
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| (adclow << 1) |
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| adc1k); |
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info->prev_cable_type = adc; |
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info->prev_cable_type_gnd = cable_type; |
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} |
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break; |
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case MAX77693_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] & MAX77693_STATUS2_CHGTYP_MASK; |
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chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT; |
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|
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if (chg_type == MAX77693_CHARGER_TYPE_NONE) { |
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*attached = false; |
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|
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cable_type = info->prev_chg_type; |
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info->prev_chg_type = MAX77693_CHARGER_TYPE_NONE; |
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} else { |
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*attached = true; |
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|
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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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case MAX77693_CABLE_GROUP_VBVOLT: |
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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] & MAX77693_STATUS1_ADC_MASK; |
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adc >>= MAX77693_STATUS1_ADC_SHIFT; |
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chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK; |
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chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT; |
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|
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if (adc == MAX77693_MUIC_ADC_OPEN |
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&& chg_type == MAX77693_CHARGER_TYPE_NONE) |
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*attached = false; |
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else |
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*attached = true; |
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|
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/* |
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* Read vbvolt field, if vbvolt is 1, |
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* this cable is used for charging. |
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*/ |
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vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK; |
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vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT; |
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|
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cable_type = vbvolt; |
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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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|
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return cable_type; |
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} |
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|
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static int max77693_muic_dock_handler(struct max77693_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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int vbvolt; |
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bool cable_attached; |
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unsigned int dock_id; |
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|
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dev_info(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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|
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switch (cable_type) { |
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case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */ |
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/* |
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* Check power cable whether attached or detached state. |
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* The Dock-Smart device need surely external power supply. |
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* If power cable(USB/TA) isn't connected to Dock device, |
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* user can't use Dock-Smart for desktop mode. |
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*/ |
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vbvolt = max77693_muic_get_cable_type(info, |
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MAX77693_CABLE_GROUP_VBVOLT, &cable_attached); |
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if (attached && !vbvolt) { |
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dev_warn(info->dev, |
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"Cannot detect external power supply\n"); |
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return 0; |
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} |
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|
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/* |
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* Notify Dock/MHL state. |
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* - Dock device include three type of cable which |
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* are HDMI, USB for mouse/keyboard and micro-usb port |
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* for USB/TA cable. Dock device need always exteranl |
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* power supply(USB/TA cable through micro-usb cable). Dock |
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* device support screen output of target to separate |
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* monitor and mouse/keyboard for desktop mode. |
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* |
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* Features of 'USB/TA cable with Dock device' |
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* - Support MHL |
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* - Support external output feature of audio |
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* - Support charging through micro-usb port without data |
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* connection if TA cable is connected to target. |
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* - Support charging and data connection through micro-usb port |
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* if USB cable is connected between target and host |
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* device. |
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* - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard) |
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*/ |
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ret = max77693_muic_set_path(info, info->path_usb, 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_DOCK, attached); |
|
extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached); |
|
goto out; |
|
case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: /* Dock-Desk */ |
|
dock_id = EXTCON_DOCK; |
|
break; |
|
case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */ |
|
dock_id = EXTCON_DOCK; |
|
if (!attached) { |
|
extcon_set_state_sync(info->edev, EXTCON_USB, false); |
|
extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP, |
|
false); |
|
} |
|
break; |
|
default: |
|
dev_err(info->dev, "failed to detect %s dock device\n", |
|
attached ? "attached" : "detached"); |
|
return -EINVAL; |
|
} |
|
|
|
/* Dock-Car/Desk/Audio, PATH:AUDIO */ |
|
ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO, |
|
attached); |
|
if (ret < 0) |
|
return ret; |
|
extcon_set_state_sync(info->edev, dock_id, attached); |
|
|
|
out: |
|
return 0; |
|
} |
|
|
|
static int max77693_muic_dock_button_handler(struct max77693_muic_info *info, |
|
int button_type, bool attached) |
|
{ |
|
struct input_dev *dock = info->dock; |
|
unsigned int code; |
|
|
|
switch (button_type) { |
|
case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON-1 |
|
... MAX77693_MUIC_ADC_REMOTE_S3_BUTTON+1: |
|
/* DOCK_KEY_PREV */ |
|
code = KEY_PREVIOUSSONG; |
|
break; |
|
case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON-1 |
|
... MAX77693_MUIC_ADC_REMOTE_S7_BUTTON+1: |
|
/* DOCK_KEY_NEXT */ |
|
code = KEY_NEXTSONG; |
|
break; |
|
case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON: |
|
/* DOCK_VOL_DOWN */ |
|
code = KEY_VOLUMEDOWN; |
|
break; |
|
case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON: |
|
/* DOCK_VOL_UP */ |
|
code = KEY_VOLUMEUP; |
|
break; |
|
case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON-1 |
|
... MAX77693_MUIC_ADC_REMOTE_S12_BUTTON+1: |
|
/* DOCK_KEY_PLAY_PAUSE */ |
|
code = KEY_PLAYPAUSE; |
|
break; |
|
default: |
|
dev_err(info->dev, |
|
"failed to detect %s key (adc:0x%x)\n", |
|
attached ? "pressed" : "released", button_type); |
|
return -EINVAL; |
|
} |
|
|
|
input_event(dock, EV_KEY, code, attached); |
|
input_sync(dock); |
|
|
|
return 0; |
|
} |
|
|
|
static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info) |
|
{ |
|
int cable_type_gnd; |
|
int ret = 0; |
|
bool attached; |
|
|
|
cable_type_gnd = max77693_muic_get_cable_type(info, |
|
MAX77693_CABLE_GROUP_ADC_GND, &attached); |
|
|
|
switch (cable_type_gnd) { |
|
case MAX77693_MUIC_GND_USB_HOST: |
|
case MAX77693_MUIC_GND_USB_HOST_VB: |
|
/* USB_HOST, PATH: AP_USB */ |
|
ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_USB, |
|
attached); |
|
if (ret < 0) |
|
return ret; |
|
extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached); |
|
break; |
|
case MAX77693_MUIC_GND_AV_CABLE_LOAD: |
|
/* Audio Video Cable with load, PATH:AUDIO */ |
|
ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO, |
|
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 MAX77693_MUIC_GND_MHL: |
|
case MAX77693_MUIC_GND_MHL_VB: |
|
/* MHL or MHL with USB/TA cable */ |
|
extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached); |
|
break; |
|
default: |
|
dev_err(info->dev, "failed to detect %s cable of gnd type\n", |
|
attached ? "attached" : "detached"); |
|
return -EINVAL; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int max77693_muic_jig_handler(struct max77693_muic_info *info, |
|
int cable_type, bool attached) |
|
{ |
|
int ret = 0; |
|
u8 path = MAX77693_CONTROL1_SW_OPEN; |
|
|
|
dev_info(info->dev, |
|
"external connector is %s (adc:0x%02x)\n", |
|
attached ? "attached" : "detached", cable_type); |
|
|
|
switch (cable_type) { |
|
case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF: /* ADC_JIG_USB_OFF */ |
|
case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON: /* ADC_JIG_USB_ON */ |
|
/* PATH:AP_USB */ |
|
path = MAX77693_CONTROL1_SW_USB; |
|
break; |
|
case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF: /* ADC_JIG_UART_OFF */ |
|
case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON: /* ADC_JIG_UART_ON */ |
|
/* PATH:AP_UART */ |
|
path = MAX77693_CONTROL1_SW_UART; |
|
break; |
|
default: |
|
dev_err(info->dev, "failed to detect %s jig cable\n", |
|
attached ? "attached" : "detached"); |
|
return -EINVAL; |
|
} |
|
|
|
ret = max77693_muic_set_path(info, path, attached); |
|
if (ret < 0) |
|
return ret; |
|
|
|
extcon_set_state_sync(info->edev, EXTCON_JIG, attached); |
|
|
|
return 0; |
|
} |
|
|
|
static int max77693_muic_adc_handler(struct max77693_muic_info *info) |
|
{ |
|
int cable_type; |
|
int button_type; |
|
bool attached; |
|
int ret = 0; |
|
|
|
/* Check accessory state which is either detached or attached */ |
|
cable_type = max77693_muic_get_cable_type(info, |
|
MAX77693_CABLE_GROUP_ADC, &attached); |
|
|
|
dev_info(info->dev, |
|
"external connector is %s (adc:0x%02x, prev_adc:0x%x)\n", |
|
attached ? "attached" : "detached", cable_type, |
|
info->prev_cable_type); |
|
|
|
switch (cable_type) { |
|
case MAX77693_MUIC_ADC_GROUND: |
|
/* USB_HOST/MHL/Audio */ |
|
max77693_muic_adc_ground_handler(info); |
|
break; |
|
case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF: |
|
case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON: |
|
case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF: |
|
case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON: |
|
/* JIG */ |
|
ret = max77693_muic_jig_handler(info, cable_type, attached); |
|
if (ret < 0) |
|
return ret; |
|
break; |
|
case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */ |
|
case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: /* Dock-Desk */ |
|
case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */ |
|
/* |
|
* DOCK device |
|
* |
|
* The MAX77693 MUIC device can detect total 34 cable type |
|
* except of charger cable and MUIC device didn't define |
|
* specfic role of cable in the range of from 0x01 to 0x12 |
|
* of ADC value. So, can use/define cable with no role according |
|
* to schema of hardware board. |
|
*/ |
|
ret = max77693_muic_dock_handler(info, cable_type, attached); |
|
if (ret < 0) |
|
return ret; |
|
break; |
|
case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON: /* DOCK_KEY_PREV */ |
|
case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON: /* DOCK_KEY_NEXT */ |
|
case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON: /* DOCK_VOL_DOWN */ |
|
case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON: /* DOCK_VOL_UP */ |
|
case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON: /* DOCK_KEY_PLAY_PAUSE */ |
|
/* |
|
* Button of DOCK device |
|
* - the Prev/Next/Volume Up/Volume Down/Play-Pause button |
|
* |
|
* The MAX77693 MUIC device can detect total 34 cable type |
|
* except of charger cable and MUIC device didn't define |
|
* specfic role of cable in the range of from 0x01 to 0x12 |
|
* of ADC value. So, can use/define cable with no role according |
|
* to schema of hardware board. |
|
*/ |
|
if (attached) |
|
button_type = info->prev_button_type = cable_type; |
|
else |
|
button_type = info->prev_button_type; |
|
|
|
ret = max77693_muic_dock_button_handler(info, button_type, |
|
attached); |
|
if (ret < 0) |
|
return ret; |
|
break; |
|
case MAX77693_MUIC_ADC_SEND_END_BUTTON: |
|
case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON: |
|
case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON: |
|
case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON: |
|
case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON: |
|
case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON: |
|
case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON: |
|
case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON: |
|
case MAX77693_MUIC_ADC_RESERVED_ACC_1: |
|
case MAX77693_MUIC_ADC_RESERVED_ACC_2: |
|
case MAX77693_MUIC_ADC_RESERVED_ACC_4: |
|
case MAX77693_MUIC_ADC_RESERVED_ACC_5: |
|
case MAX77693_MUIC_ADC_CEA936_AUDIO: |
|
case MAX77693_MUIC_ADC_PHONE_POWERED_DEV: |
|
case MAX77693_MUIC_ADC_TTY_CONVERTER: |
|
case MAX77693_MUIC_ADC_UART_CABLE: |
|
case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG: |
|
case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG: |
|
/* |
|
* This accessory isn't used in general case if it is specially |
|
* needed to detect additional accessory, should implement |
|
* proper operation when this accessory is attached/detached. |
|
*/ |
|
dev_info(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 max77693_muic_chg_handler(struct max77693_muic_info *info) |
|
{ |
|
int chg_type; |
|
int cable_type_gnd; |
|
int cable_type; |
|
bool attached; |
|
bool cable_attached; |
|
int ret = 0; |
|
|
|
chg_type = max77693_muic_get_cable_type(info, |
|
MAX77693_CABLE_GROUP_CHG, &attached); |
|
|
|
dev_info(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 MAX77693_CHARGER_TYPE_USB: |
|
case MAX77693_CHARGER_TYPE_DEDICATED_CHG: |
|
case MAX77693_CHARGER_TYPE_NONE: |
|
/* Check MAX77693_CABLE_GROUP_ADC_GND type */ |
|
cable_type_gnd = max77693_muic_get_cable_type(info, |
|
MAX77693_CABLE_GROUP_ADC_GND, |
|
&cable_attached); |
|
switch (cable_type_gnd) { |
|
case MAX77693_MUIC_GND_MHL: |
|
case MAX77693_MUIC_GND_MHL_VB: |
|
/* |
|
* MHL cable with USB/TA cable |
|
* - MHL cable include two port(HDMI line and separate |
|
* micro-usb port. When the target connect MHL cable, |
|
* extcon driver check whether USB/TA cable is |
|
* connected. If USB/TA cable is connected, extcon |
|
* driver notify state to notifiee for charging battery. |
|
* |
|
* Features of 'USB/TA with MHL cable' |
|
* - Support MHL |
|
* - Support charging through micro-usb port without |
|
* data connection |
|
*/ |
|
extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, |
|
attached); |
|
extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, |
|
cable_attached); |
|
break; |
|
} |
|
|
|
/* Check MAX77693_CABLE_GROUP_ADC type */ |
|
cable_type = max77693_muic_get_cable_type(info, |
|
MAX77693_CABLE_GROUP_ADC, |
|
&cable_attached); |
|
switch (cable_type) { |
|
case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */ |
|
/* |
|
* Dock-Audio device with USB/TA cable |
|
* - Dock device include two port(Dock-Audio and micro- |
|
* usb port). When the target connect Dock-Audio device, |
|
* extcon driver check whether USB/TA cable is connected |
|
* or not. If USB/TA cable is connected, extcon driver |
|
* notify state to notifiee for charging battery. |
|
* |
|
* Features of 'USB/TA cable with Dock-Audio device' |
|
* - Support external output feature of audio. |
|
* - Support charging through micro-usb port without |
|
* data connection. |
|
*/ |
|
extcon_set_state_sync(info->edev, EXTCON_USB, |
|
attached); |
|
extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP, |
|
attached); |
|
|
|
if (!cable_attached) |
|
extcon_set_state_sync(info->edev, EXTCON_DOCK, |
|
cable_attached); |
|
break; |
|
case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */ |
|
/* |
|
* Dock-Smart device with USB/TA cable |
|
* - Dock-Desk device include three type of cable which |
|
* are HDMI, USB for mouse/keyboard and micro-usb port |
|
* for USB/TA cable. Dock-Smart device need always |
|
* exteranl power supply(USB/TA cable through micro-usb |
|
* cable). Dock-Smart device support screen output of |
|
* target to separate monitor and mouse/keyboard for |
|
* desktop mode. |
|
* |
|
* Features of 'USB/TA cable with Dock-Smart device' |
|
* - Support MHL |
|
* - Support external output feature of audio |
|
* - Support charging through micro-usb port without |
|
* data connection if TA cable is connected to target. |
|
* - Support charging and data connection through micro- |
|
* usb port if USB cable is connected between target |
|
* and host device |
|
* - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard) |
|
*/ |
|
ret = max77693_muic_set_path(info, info->path_usb, |
|
attached); |
|
if (ret < 0) |
|
return ret; |
|
|
|
extcon_set_state_sync(info->edev, EXTCON_DOCK, |
|
attached); |
|
extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, |
|
attached); |
|
break; |
|
} |
|
|
|
/* Check MAX77693_CABLE_GROUP_CHG type */ |
|
switch (chg_type) { |
|
case MAX77693_CHARGER_TYPE_NONE: |
|
/* |
|
* When MHL(with USB/TA cable) or Dock-Audio with USB/TA |
|
* cable is attached, muic device happen below two irq. |
|
* - 'MAX77693_MUIC_IRQ_INT1_ADC' for detecting |
|
* MHL/Dock-Audio. |
|
* - 'MAX77693_MUIC_IRQ_INT2_CHGTYP' for detecting |
|
* USB/TA cable connected to MHL or Dock-Audio. |
|
* Always, happen eariler MAX77693_MUIC_IRQ_INT1_ADC |
|
* irq than MAX77693_MUIC_IRQ_INT2_CHGTYP irq. |
|
* |
|
* If user attach MHL (with USB/TA cable and immediately |
|
* detach MHL with USB/TA cable before MAX77693_MUIC_IRQ |
|
* _INT2_CHGTYP irq is happened, USB/TA cable remain |
|
* connected state to target. But USB/TA cable isn't |
|
* connected to target. The user be face with unusual |
|
* action. So, driver should check this situation in |
|
* spite of, that previous charger type is N/A. |
|
*/ |
|
break; |
|
case MAX77693_CHARGER_TYPE_USB: |
|
/* Only USB cable, PATH:AP_USB */ |
|
ret = max77693_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 MAX77693_CHARGER_TYPE_DEDICATED_CHG: |
|
/* Only TA cable */ |
|
extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, |
|
attached); |
|
break; |
|
} |
|
break; |
|
case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT: |
|
extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP, |
|
attached); |
|
break; |
|
case MAX77693_CHARGER_TYPE_APPLE_500MA: |
|
extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW, |
|
attached); |
|
break; |
|
case MAX77693_CHARGER_TYPE_APPLE_1A_2A: |
|
extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST, |
|
attached); |
|
break; |
|
case MAX77693_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 max77693_muic_irq_work(struct work_struct *work) |
|
{ |
|
struct max77693_muic_info *info = container_of(work, |
|
struct max77693_muic_info, irq_work); |
|
int irq_type = -1; |
|
int i, ret = 0; |
|
|
|
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 = regmap_bulk_read(info->max77693->regmap_muic, |
|
MAX77693_MUIC_REG_STATUS1, info->status, 2); |
|
if (ret) { |
|
dev_err(info->dev, "failed to read MUIC register\n"); |
|
mutex_unlock(&info->mutex); |
|
return; |
|
} |
|
|
|
switch (irq_type) { |
|
case MAX77693_MUIC_IRQ_INT1_ADC: |
|
case MAX77693_MUIC_IRQ_INT1_ADC_LOW: |
|
case MAX77693_MUIC_IRQ_INT1_ADC_ERR: |
|
case MAX77693_MUIC_IRQ_INT1_ADC1K: |
|
/* |
|
* Handle all of accessory except for |
|
* type of charger accessory. |
|
*/ |
|
ret = max77693_muic_adc_handler(info); |
|
break; |
|
case MAX77693_MUIC_IRQ_INT2_CHGTYP: |
|
case MAX77693_MUIC_IRQ_INT2_CHGDETREUN: |
|
case MAX77693_MUIC_IRQ_INT2_DCDTMR: |
|
case MAX77693_MUIC_IRQ_INT2_DXOVP: |
|
case MAX77693_MUIC_IRQ_INT2_VBVOLT: |
|
case MAX77693_MUIC_IRQ_INT2_VIDRM: |
|
/* Handle charger accessory */ |
|
ret = max77693_muic_chg_handler(info); |
|
break; |
|
case MAX77693_MUIC_IRQ_INT3_EOC: |
|
case MAX77693_MUIC_IRQ_INT3_CGMBC: |
|
case MAX77693_MUIC_IRQ_INT3_OVP: |
|
case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR: |
|
case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED: |
|
case MAX77693_MUIC_IRQ_INT3_BAT_DET: |
|
break; |
|
default: |
|
dev_err(info->dev, "muic 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); |
|
} |
|
|
|
static irqreturn_t max77693_muic_irq_handler(int irq, void *data) |
|
{ |
|
struct max77693_muic_info *info = data; |
|
|
|
info->irq = irq; |
|
schedule_work(&info->irq_work); |
|
|
|
return IRQ_HANDLED; |
|
} |
|
|
|
static const struct regmap_config max77693_muic_regmap_config = { |
|
.reg_bits = 8, |
|
.val_bits = 8, |
|
}; |
|
|
|
static int max77693_muic_detect_accessory(struct max77693_muic_info *info) |
|
{ |
|
int ret = 0; |
|
int adc; |
|
int chg_type; |
|
bool attached; |
|
|
|
mutex_lock(&info->mutex); |
|
|
|
/* Read STATUSx register to detect accessory */ |
|
ret = regmap_bulk_read(info->max77693->regmap_muic, |
|
MAX77693_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 = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_ADC, |
|
&attached); |
|
if (attached && adc != MAX77693_MUIC_ADC_OPEN) { |
|
ret = max77693_muic_adc_handler(info); |
|
if (ret < 0) { |
|
dev_err(info->dev, "Cannot detect accessory\n"); |
|
mutex_unlock(&info->mutex); |
|
return ret; |
|
} |
|
} |
|
|
|
chg_type = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_CHG, |
|
&attached); |
|
if (attached && chg_type != MAX77693_CHARGER_TYPE_NONE) { |
|
ret = max77693_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 max77693_muic_detect_cable_wq(struct work_struct *work) |
|
{ |
|
struct max77693_muic_info *info = container_of(to_delayed_work(work), |
|
struct max77693_muic_info, wq_detcable); |
|
|
|
max77693_muic_detect_accessory(info); |
|
} |
|
|
|
static int max77693_muic_probe(struct platform_device *pdev) |
|
{ |
|
struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent); |
|
struct max77693_platform_data *pdata = dev_get_platdata(max77693->dev); |
|
struct max77693_muic_info *info; |
|
struct max77693_reg_data *init_data; |
|
int num_init_data; |
|
int delay_jiffies; |
|
int cable_type; |
|
bool attached; |
|
int ret; |
|
int i; |
|
unsigned int id; |
|
|
|
info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info), |
|
GFP_KERNEL); |
|
if (!info) |
|
return -ENOMEM; |
|
|
|
info->dev = &pdev->dev; |
|
info->max77693 = max77693; |
|
if (info->max77693->regmap_muic) { |
|
dev_dbg(&pdev->dev, "allocate register map\n"); |
|
} else { |
|
info->max77693->regmap_muic = devm_regmap_init_i2c( |
|
info->max77693->i2c_muic, |
|
&max77693_muic_regmap_config); |
|
if (IS_ERR(info->max77693->regmap_muic)) { |
|
ret = PTR_ERR(info->max77693->regmap_muic); |
|
dev_err(max77693->dev, |
|
"failed to allocate register map: %d\n", ret); |
|
return ret; |
|
} |
|
} |
|
|
|
/* Register input device for button of dock device */ |
|
info->dock = devm_input_allocate_device(&pdev->dev); |
|
if (!info->dock) { |
|
dev_err(&pdev->dev, "%s: failed to allocate input\n", __func__); |
|
return -ENOMEM; |
|
} |
|
info->dock->name = "max77693-muic/dock"; |
|
info->dock->phys = "max77693-muic/extcon"; |
|
info->dock->dev.parent = &pdev->dev; |
|
|
|
__set_bit(EV_REP, info->dock->evbit); |
|
|
|
input_set_capability(info->dock, EV_KEY, KEY_VOLUMEUP); |
|
input_set_capability(info->dock, EV_KEY, KEY_VOLUMEDOWN); |
|
input_set_capability(info->dock, EV_KEY, KEY_PLAYPAUSE); |
|
input_set_capability(info->dock, EV_KEY, KEY_PREVIOUSSONG); |
|
input_set_capability(info->dock, EV_KEY, KEY_NEXTSONG); |
|
|
|
ret = input_register_device(info->dock); |
|
if (ret < 0) { |
|
dev_err(&pdev->dev, "Cannot register input device error(%d)\n", |
|
ret); |
|
return ret; |
|
} |
|
|
|
platform_set_drvdata(pdev, info); |
|
mutex_init(&info->mutex); |
|
|
|
ret = devm_work_autocancel(&pdev->dev, &info->irq_work, |
|
max77693_muic_irq_work); |
|
if (ret) |
|
return ret; |
|
|
|
/* Support irq domain for MAX77693 MUIC device */ |
|
for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) { |
|
struct max77693_muic_irq *muic_irq = &muic_irqs[i]; |
|
int virq; |
|
|
|
virq = regmap_irq_get_virq(max77693->irq_data_muic, |
|
muic_irq->irq); |
|
if (virq <= 0) |
|
return -EINVAL; |
|
muic_irq->virq = virq; |
|
|
|
ret = devm_request_threaded_irq(&pdev->dev, virq, NULL, |
|
max77693_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, |
|
max77693_extcon_cable); |
|
if (IS_ERR(info->edev)) { |
|
dev_err(&pdev->dev, "failed to allocate memory for extcon\n"); |
|
return PTR_ERR(info->edev); |
|
} |
|
|
|
ret = devm_extcon_dev_register(&pdev->dev, info->edev); |
|
if (ret) { |
|
dev_err(&pdev->dev, "failed to register extcon device\n"); |
|
return ret; |
|
} |
|
|
|
/* Initialize MUIC register by using platform data or default data */ |
|
if (pdata && pdata->muic_data) { |
|
init_data = pdata->muic_data->init_data; |
|
num_init_data = pdata->muic_data->num_init_data; |
|
} else { |
|
init_data = default_init_data; |
|
num_init_data = ARRAY_SIZE(default_init_data); |
|
} |
|
|
|
for (i = 0; i < num_init_data; i++) { |
|
regmap_write(info->max77693->regmap_muic, |
|
init_data[i].addr, |
|
init_data[i].data); |
|
} |
|
|
|
if (pdata && pdata->muic_data) { |
|
struct max77693_muic_platform_data *muic_pdata |
|
= pdata->muic_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 = MAX77693_CONTROL1_SW_UART; |
|
|
|
if (muic_pdata->path_usb) |
|
info->path_usb = muic_pdata->path_usb; |
|
else |
|
info->path_usb = MAX77693_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_usb = MAX77693_CONTROL1_SW_USB; |
|
info->path_uart = MAX77693_CONTROL1_SW_UART; |
|
delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT); |
|
} |
|
|
|
/* Set initial path for UART when JIG is connected to get serial logs */ |
|
ret = regmap_bulk_read(info->max77693->regmap_muic, |
|
MAX77693_MUIC_REG_STATUS1, info->status, 2); |
|
if (ret) { |
|
dev_err(info->dev, "failed to read MUIC register\n"); |
|
return ret; |
|
} |
|
cable_type = max77693_muic_get_cable_type(info, |
|
MAX77693_CABLE_GROUP_ADC, &attached); |
|
if (attached && (cable_type == MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON || |
|
cable_type == MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF)) |
|
max77693_muic_set_path(info, info->path_uart, true); |
|
|
|
/* Check revision number of MUIC device*/ |
|
ret = regmap_read(info->max77693->regmap_muic, |
|
MAX77693_MUIC_REG_ID, &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 */ |
|
max77693_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, max77693_muic_detect_cable_wq); |
|
queue_delayed_work(system_power_efficient_wq, &info->wq_detcable, |
|
delay_jiffies); |
|
|
|
return ret; |
|
} |
|
|
|
static struct platform_driver max77693_muic_driver = { |
|
.driver = { |
|
.name = DEV_NAME, |
|
}, |
|
.probe = max77693_muic_probe, |
|
}; |
|
|
|
module_platform_driver(max77693_muic_driver); |
|
|
|
MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver"); |
|
MODULE_AUTHOR("Chanwoo Choi <[email protected]>"); |
|
MODULE_LICENSE("GPL"); |
|
MODULE_ALIAS("platform:max77693-muic");
|
|
|