| /* |
| * extcon-max77693.c - MAX77693 extcon driver to support MAX77693 MUIC |
| * |
| * Copyright (C) 2012 Samsung Electrnoics |
| * Chanwoo Choi <cw00.choi@samsung.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/i2c.h> |
| #include <linux/slab.h> |
| #include <linux/interrupt.h> |
| #include <linux/err.h> |
| #include <linux/platform_device.h> |
| #include <linux/mfd/max77693.h> |
| #include <linux/mfd/max77693-private.h> |
| #include <linux/extcon.h> |
| #include <linux/regmap.h> |
| #include <linux/irqdomain.h> |
| |
| #define DEV_NAME "max77693-muic" |
| |
| /* MAX77693 MUIC - STATUS1~3 Register */ |
| #define STATUS1_ADC_SHIFT (0) |
| #define STATUS1_ADCLOW_SHIFT (5) |
| #define STATUS1_ADCERR_SHIFT (6) |
| #define STATUS1_ADC1K_SHIFT (7) |
| #define STATUS1_ADC_MASK (0x1f << STATUS1_ADC_SHIFT) |
| #define STATUS1_ADCLOW_MASK (0x1 << STATUS1_ADCLOW_SHIFT) |
| #define STATUS1_ADCERR_MASK (0x1 << STATUS1_ADCERR_SHIFT) |
| #define STATUS1_ADC1K_MASK (0x1 << STATUS1_ADC1K_SHIFT) |
| |
| #define STATUS2_CHGTYP_SHIFT (0) |
| #define STATUS2_CHGDETRUN_SHIFT (3) |
| #define STATUS2_DCDTMR_SHIFT (4) |
| #define STATUS2_DXOVP_SHIFT (5) |
| #define STATUS2_VBVOLT_SHIFT (6) |
| #define STATUS2_VIDRM_SHIFT (7) |
| #define STATUS2_CHGTYP_MASK (0x7 << STATUS2_CHGTYP_SHIFT) |
| #define STATUS2_CHGDETRUN_MASK (0x1 << STATUS2_CHGDETRUN_SHIFT) |
| #define STATUS2_DCDTMR_MASK (0x1 << STATUS2_DCDTMR_SHIFT) |
| #define STATUS2_DXOVP_MASK (0x1 << STATUS2_DXOVP_SHIFT) |
| #define STATUS2_VBVOLT_MASK (0x1 << STATUS2_VBVOLT_SHIFT) |
| #define STATUS2_VIDRM_MASK (0x1 << STATUS2_VIDRM_SHIFT) |
| |
| #define STATUS3_OVP_SHIFT (2) |
| #define STATUS3_OVP_MASK (0x1 << STATUS3_OVP_SHIFT) |
| |
| /* MAX77693 CDETCTRL1~2 register */ |
| #define CDETCTRL1_CHGDETEN_SHIFT (0) |
| #define CDETCTRL1_CHGTYPMAN_SHIFT (1) |
| #define CDETCTRL1_DCDEN_SHIFT (2) |
| #define CDETCTRL1_DCD2SCT_SHIFT (3) |
| #define CDETCTRL1_CDDELAY_SHIFT (4) |
| #define CDETCTRL1_DCDCPL_SHIFT (5) |
| #define CDETCTRL1_CDPDET_SHIFT (7) |
| #define CDETCTRL1_CHGDETEN_MASK (0x1 << CDETCTRL1_CHGDETEN_SHIFT) |
| #define CDETCTRL1_CHGTYPMAN_MASK (0x1 << CDETCTRL1_CHGTYPMAN_SHIFT) |
| #define CDETCTRL1_DCDEN_MASK (0x1 << CDETCTRL1_DCDEN_SHIFT) |
| #define CDETCTRL1_DCD2SCT_MASK (0x1 << CDETCTRL1_DCD2SCT_SHIFT) |
| #define CDETCTRL1_CDDELAY_MASK (0x1 << CDETCTRL1_CDDELAY_SHIFT) |
| #define CDETCTRL1_DCDCPL_MASK (0x1 << CDETCTRL1_DCDCPL_SHIFT) |
| #define CDETCTRL1_CDPDET_MASK (0x1 << CDETCTRL1_CDPDET_SHIFT) |
| |
| #define CDETCTRL2_VIDRMEN_SHIFT (1) |
| #define CDETCTRL2_DXOVPEN_SHIFT (3) |
| #define CDETCTRL2_VIDRMEN_MASK (0x1 << CDETCTRL2_VIDRMEN_SHIFT) |
| #define CDETCTRL2_DXOVPEN_MASK (0x1 << CDETCTRL2_DXOVPEN_SHIFT) |
| |
| /* MAX77693 MUIC - CONTROL1~3 register */ |
| #define COMN1SW_SHIFT (0) |
| #define COMP2SW_SHIFT (3) |
| #define COMN1SW_MASK (0x7 << COMN1SW_SHIFT) |
| #define COMP2SW_MASK (0x7 << COMP2SW_SHIFT) |
| #define COMP_SW_MASK (COMP2SW_MASK | COMN1SW_MASK) |
| #define CONTROL1_SW_USB ((1 << COMP2SW_SHIFT) \ |
| | (1 << COMN1SW_SHIFT)) |
| #define CONTROL1_SW_AUDIO ((2 << COMP2SW_SHIFT) \ |
| | (2 << COMN1SW_SHIFT)) |
| #define CONTROL1_SW_UART ((3 << COMP2SW_SHIFT) \ |
| | (3 << COMN1SW_SHIFT)) |
| #define CONTROL1_SW_OPEN ((0 << COMP2SW_SHIFT) \ |
| | (0 << COMN1SW_SHIFT)) |
| |
| #define CONTROL2_LOWPWR_SHIFT (0) |
| #define CONTROL2_ADCEN_SHIFT (1) |
| #define CONTROL2_CPEN_SHIFT (2) |
| #define CONTROL2_SFOUTASRT_SHIFT (3) |
| #define CONTROL2_SFOUTORD_SHIFT (4) |
| #define CONTROL2_ACCDET_SHIFT (5) |
| #define CONTROL2_USBCPINT_SHIFT (6) |
| #define CONTROL2_RCPS_SHIFT (7) |
| #define CONTROL2_LOWPWR_MASK (0x1 << CONTROL2_LOWPWR_SHIFT) |
| #define CONTROL2_ADCEN_MASK (0x1 << CONTROL2_ADCEN_SHIFT) |
| #define CONTROL2_CPEN_MASK (0x1 << CONTROL2_CPEN_SHIFT) |
| #define CONTROL2_SFOUTASRT_MASK (0x1 << CONTROL2_SFOUTASRT_SHIFT) |
| #define CONTROL2_SFOUTORD_MASK (0x1 << CONTROL2_SFOUTORD_SHIFT) |
| #define CONTROL2_ACCDET_MASK (0x1 << CONTROL2_ACCDET_SHIFT) |
| #define CONTROL2_USBCPINT_MASK (0x1 << CONTROL2_USBCPINT_SHIFT) |
| #define CONTROL2_RCPS_MASK (0x1 << CONTROL2_RCPS_SHIFT) |
| |
| #define CONTROL3_JIGSET_SHIFT (0) |
| #define CONTROL3_BTLDSET_SHIFT (2) |
| #define CONTROL3_ADCDBSET_SHIFT (4) |
| #define CONTROL3_JIGSET_MASK (0x3 << CONTROL3_JIGSET_SHIFT) |
| #define CONTROL3_BTLDSET_MASK (0x3 << CONTROL3_BTLDSET_SHIFT) |
| #define CONTROL3_ADCDBSET_MASK (0x3 << CONTROL3_ADCDBSET_SHIFT) |
| |
| enum max77693_muic_adc_debounce_time { |
| ADC_DEBOUNCE_TIME_5MS = 0, |
| ADC_DEBOUNCE_TIME_10MS, |
| ADC_DEBOUNCE_TIME_25MS, |
| ADC_DEBOUNCE_TIME_38_62MS, |
| }; |
| |
| struct max77693_muic_info { |
| struct device *dev; |
| struct max77693_dev *max77693; |
| struct extcon_dev *edev; |
| int prev_adc; |
| int prev_adc_gnd; |
| int prev_chg_type; |
| u8 status[2]; |
| |
| int irq; |
| struct work_struct irq_work; |
| struct mutex mutex; |
| }; |
| |
| enum max77693_muic_charger_type { |
| MAX77693_CHARGER_TYPE_NONE = 0, |
| MAX77693_CHARGER_TYPE_USB, |
| MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT, |
| MAX77693_CHARGER_TYPE_DEDICATED_CHG, |
| MAX77693_CHARGER_TYPE_APPLE_500MA, |
| MAX77693_CHARGER_TYPE_APPLE_1A_2A, |
| MAX77693_CHARGER_TYPE_DEAD_BATTERY = 7, |
| }; |
| |
| /** |
| * struct max77693_muic_irq |
| * @irq: the index of irq list of MUIC device. |
| * @name: the name of irq. |
| * @virq: the virtual irq to use irq domain |
| */ |
| struct max77693_muic_irq { |
| unsigned int irq; |
| const char *name; |
| unsigned int virq; |
| }; |
| |
| static struct max77693_muic_irq muic_irqs[] = { |
| { MAX77693_MUIC_IRQ_INT1_ADC, "muic-ADC" }, |
| { MAX77693_MUIC_IRQ_INT1_ADC_LOW, "muic-ADCLOW" }, |
| { MAX77693_MUIC_IRQ_INT1_ADC_ERR, "muic-ADCError" }, |
| { MAX77693_MUIC_IRQ_INT1_ADC1K, "muic-ADC1K" }, |
| { MAX77693_MUIC_IRQ_INT2_CHGTYP, "muic-CHGTYP" }, |
| { MAX77693_MUIC_IRQ_INT2_CHGDETREUN, "muic-CHGDETREUN" }, |
| { MAX77693_MUIC_IRQ_INT2_DCDTMR, "muic-DCDTMR" }, |
| { MAX77693_MUIC_IRQ_INT2_DXOVP, "muic-DXOVP" }, |
| { MAX77693_MUIC_IRQ_INT2_VBVOLT, "muic-VBVOLT" }, |
| { MAX77693_MUIC_IRQ_INT2_VIDRM, "muic-VIDRM" }, |
| { MAX77693_MUIC_IRQ_INT3_EOC, "muic-EOC" }, |
| { MAX77693_MUIC_IRQ_INT3_CGMBC, "muic-CGMBC" }, |
| { MAX77693_MUIC_IRQ_INT3_OVP, "muic-OVP" }, |
| { MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR, "muic-MBCCHG_ERR" }, |
| { MAX77693_MUIC_IRQ_INT3_CHG_ENABLED, "muic-CHG_ENABLED" }, |
| { MAX77693_MUIC_IRQ_INT3_BAT_DET, "muic-BAT_DET" }, |
| }; |
| |
| /* Define supported accessory type */ |
| enum max77693_muic_acc_type { |
| MAX77693_MUIC_ADC_GROUND = 0x0, |
| MAX77693_MUIC_ADC_SEND_END_BUTTON, |
| MAX77693_MUIC_ADC_REMOTE_S1_BUTTON, |
| MAX77693_MUIC_ADC_REMOTE_S2_BUTTON, |
| MAX77693_MUIC_ADC_REMOTE_S3_BUTTON, |
| MAX77693_MUIC_ADC_REMOTE_S4_BUTTON, |
| MAX77693_MUIC_ADC_REMOTE_S5_BUTTON, |
| MAX77693_MUIC_ADC_REMOTE_S6_BUTTON, |
| MAX77693_MUIC_ADC_REMOTE_S7_BUTTON, |
| MAX77693_MUIC_ADC_REMOTE_S8_BUTTON, |
| MAX77693_MUIC_ADC_REMOTE_S9_BUTTON, |
| MAX77693_MUIC_ADC_REMOTE_S10_BUTTON, |
| MAX77693_MUIC_ADC_REMOTE_S11_BUTTON, |
| MAX77693_MUIC_ADC_REMOTE_S12_BUTTON, |
| MAX77693_MUIC_ADC_RESERVED_ACC_1, |
| MAX77693_MUIC_ADC_RESERVED_ACC_2, |
| MAX77693_MUIC_ADC_RESERVED_ACC_3, |
| MAX77693_MUIC_ADC_RESERVED_ACC_4, |
| MAX77693_MUIC_ADC_RESERVED_ACC_5, |
| MAX77693_MUIC_ADC_CEA936_AUDIO, |
| MAX77693_MUIC_ADC_PHONE_POWERED_DEV, |
| MAX77693_MUIC_ADC_TTY_CONVERTER, |
| MAX77693_MUIC_ADC_UART_CABLE, |
| MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG, |
| MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF, |
| MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON, |
| MAX77693_MUIC_ADC_AV_CABLE_NOLOAD, |
| MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG, |
| MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF, |
| MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON, |
| MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE, |
| MAX77693_MUIC_ADC_OPEN, |
| |
| /* The below accessories have same ADC value so ADCLow and |
| ADC1K bit is used to separate specific accessory */ |
| MAX77693_MUIC_GND_USB_OTG = 0x100, /* ADC:0x0, ADCLow:0, ADC1K:0 */ |
| MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* ADC:0x0, ADCLow:1, ADC1K:0 */ |
| MAX77693_MUIC_GND_MHL_CABLE = 0x103, /* ADC:0x0, ADCLow:1, ADC1K:1 */ |
| }; |
| |
| /* MAX77693 MUIC device support below list of accessories(external connector) */ |
| const char *max77693_extcon_cable[] = { |
| [0] = "USB", |
| [1] = "USB-Host", |
| [2] = "TA", |
| [3] = "Fast-charger", |
| [4] = "Slow-charger", |
| [5] = "Charge-downstream", |
| [6] = "MHL", |
| [7] = "Audio-video-load", |
| [8] = "Audio-video-noload", |
| [9] = "JIG", |
| |
| NULL, |
| }; |
| |
| static int max77693_muic_set_debounce_time(struct max77693_muic_info *info, |
| enum max77693_muic_adc_debounce_time time) |
| { |
| int ret; |
| |
| switch (time) { |
| case ADC_DEBOUNCE_TIME_5MS: |
| case ADC_DEBOUNCE_TIME_10MS: |
| case ADC_DEBOUNCE_TIME_25MS: |
| case ADC_DEBOUNCE_TIME_38_62MS: |
| ret = max77693_update_reg(info->max77693->regmap_muic, |
| MAX77693_MUIC_REG_CTRL3, |
| time << CONTROL3_ADCDBSET_SHIFT, |
| CONTROL3_ADCDBSET_MASK); |
| if (ret) |
| dev_err(info->dev, "failed to set ADC debounce time\n"); |
| break; |
| default: |
| dev_err(info->dev, "invalid ADC debounce time\n"); |
| ret = -EINVAL; |
| break; |
| } |
| |
| return ret; |
| }; |
| |
| static int max77693_muic_set_path(struct max77693_muic_info *info, |
| u8 val, bool attached) |
| { |
| int ret = 0; |
| u8 ctrl1, ctrl2 = 0; |
| |
| if (attached) |
| ctrl1 = val; |
| else |
| ctrl1 = CONTROL1_SW_OPEN; |
| |
| ret = max77693_update_reg(info->max77693->regmap_muic, |
| MAX77693_MUIC_REG_CTRL1, ctrl1, COMP_SW_MASK); |
| if (ret < 0) { |
| dev_err(info->dev, "failed to update MUIC register\n"); |
| goto out; |
| } |
| |
| if (attached) |
| ctrl2 |= CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */ |
| else |
| ctrl2 |= CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */ |
| |
| ret = max77693_update_reg(info->max77693->regmap_muic, |
| MAX77693_MUIC_REG_CTRL2, ctrl2, |
| CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK); |
| if (ret < 0) { |
| dev_err(info->dev, "failed to update MUIC register\n"); |
| goto out; |
| } |
| |
| dev_info(info->dev, |
| "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n", |
| ctrl1, ctrl2, attached ? "attached" : "detached"); |
| out: |
| return ret; |
| } |
| |
| static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info, |
| bool attached) |
| { |
| int ret = 0; |
| int type; |
| int adc, adc1k, adclow; |
| |
| if (attached) { |
| adc = info->status[0] & STATUS1_ADC_MASK; |
| adclow = info->status[0] & STATUS1_ADCLOW_MASK; |
| adclow >>= STATUS1_ADCLOW_SHIFT; |
| adc1k = info->status[0] & STATUS1_ADC1K_MASK; |
| adc1k >>= STATUS1_ADC1K_SHIFT; |
| |
| /** |
| * [0x1][ADCLow][ADC1K] |
| * [0x1 0 0 ] : USB_OTG |
| * [0x1 1 0 ] : Audio Video Cable with load |
| * [0x1 1 1 ] : MHL |
| */ |
| type = ((0x1 << 8) | (adclow << 1) | adc1k); |
| |
| /* Store previous ADC value to handle accessory |
| when accessory will be detached */ |
| info->prev_adc = adc; |
| info->prev_adc_gnd = type; |
| } else |
| type = info->prev_adc_gnd; |
| |
| switch (type) { |
| case MAX77693_MUIC_GND_USB_OTG: |
| /* USB_OTG */ |
| ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached); |
| if (ret < 0) |
| goto out; |
| extcon_set_cable_state(info->edev, "USB-Host", attached); |
| break; |
| case MAX77693_MUIC_GND_AV_CABLE_LOAD: |
| /* Audio Video Cable with load */ |
| ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached); |
| if (ret < 0) |
| goto out; |
| extcon_set_cable_state(info->edev, |
| "Audio-video-load", attached); |
| break; |
| case MAX77693_MUIC_GND_MHL_CABLE: |
| /* MHL */ |
| extcon_set_cable_state(info->edev, "MHL", attached); |
| break; |
| default: |
| dev_err(info->dev, "failed to detect %s accessory\n", |
| attached ? "attached" : "detached"); |
| dev_err(info->dev, "- adc:0x%x, adclow:0x%x, adc1k:0x%x\n", |
| adc, adclow, adc1k); |
| ret = -EINVAL; |
| break; |
| } |
| |
| out: |
| return ret; |
| } |
| |
| static int max77693_muic_adc_handler(struct max77693_muic_info *info, |
| int curr_adc, bool attached) |
| { |
| int ret = 0; |
| int adc; |
| |
| if (attached) { |
| /* Store ADC value to handle accessory |
| when accessory will be detached */ |
| info->prev_adc = curr_adc; |
| adc = curr_adc; |
| } else |
| adc = info->prev_adc; |
| |
| dev_info(info->dev, |
| "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n", |
| attached ? "attached" : "detached", curr_adc, info->prev_adc); |
| |
| switch (adc) { |
| case MAX77693_MUIC_ADC_GROUND: |
| /* USB_OTG/MHL/Audio */ |
| max77693_muic_adc_ground_handler(info, attached); |
| break; |
| case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF: |
| case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON: |
| /* USB */ |
| ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached); |
| if (ret < 0) |
| goto out; |
| extcon_set_cable_state(info->edev, "USB", attached); |
| break; |
| case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF: |
| case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON: |
| /* JIG */ |
| ret = max77693_muic_set_path(info, CONTROL1_SW_UART, attached); |
| if (ret < 0) |
| goto out; |
| extcon_set_cable_state(info->edev, "JIG", attached); |
| break; |
| case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: |
| /* Audio Video cable with no-load */ |
| ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached); |
| if (ret < 0) |
| goto out; |
| extcon_set_cable_state(info->edev, |
| "Audio-video-noload", attached); |
| 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_S3_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_S7_BUTTON: |
| case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON: |
| case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON: |
| case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON: |
| case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON: |
| case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON: |
| case MAX77693_MUIC_ADC_RESERVED_ACC_1: |
| case MAX77693_MUIC_ADC_RESERVED_ACC_2: |
| case MAX77693_MUIC_ADC_RESERVED_ACC_3: |
| 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_AV_CABLE_NOLOAD: |
| 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", adc); |
| goto out; |
| default: |
| dev_err(info->dev, |
| "failed to detect %s accessory (adc:0x%x)\n", |
| attached ? "attached" : "detached", adc); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| out: |
| return ret; |
| } |
| |
| static int max77693_muic_chg_handler(struct max77693_muic_info *info, |
| int curr_chg_type, bool attached) |
| { |
| int ret = 0; |
| int chg_type; |
| |
| if (attached) { |
| /* Store previous charger type to control |
| when charger accessory will be detached */ |
| info->prev_chg_type = curr_chg_type; |
| chg_type = curr_chg_type; |
| } else |
| chg_type = info->prev_chg_type; |
| |
| dev_info(info->dev, |
| "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n", |
| attached ? "attached" : "detached", |
| curr_chg_type, info->prev_chg_type); |
| |
| switch (chg_type) { |
| case MAX77693_CHARGER_TYPE_USB: |
| ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached); |
| if (ret < 0) |
| goto out; |
| extcon_set_cable_state(info->edev, "USB", attached); |
| break; |
| case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT: |
| extcon_set_cable_state(info->edev, |
| "Charge-downstream", attached); |
| break; |
| case MAX77693_CHARGER_TYPE_DEDICATED_CHG: |
| extcon_set_cable_state(info->edev, "TA", attached); |
| break; |
| case MAX77693_CHARGER_TYPE_APPLE_500MA: |
| extcon_set_cable_state(info->edev, "Slow-charger", attached); |
| break; |
| case MAX77693_CHARGER_TYPE_APPLE_1A_2A: |
| extcon_set_cable_state(info->edev, "Fast-charger", 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); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| out: |
| return ret; |
| } |
| |
| 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 curr_adc, curr_chg_type; |
| int irq_type = -1; |
| int i, ret = 0; |
| bool attached = true; |
| |
| 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 = max77693_bulk_read(info->max77693->regmap_muic, |
| MAX77693_MUIC_REG_STATUS1, 2, info->status); |
| if (ret) { |
| dev_err(info->dev, "failed to read MUIC register\n"); |
| mutex_unlock(&info->mutex); |
| return; |
| } |
| |
| switch (irq_type) { |
| case 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 */ |
| curr_adc = info->status[0] & STATUS1_ADC_MASK; |
| curr_adc >>= STATUS1_ADC_SHIFT; |
| |
| /* Check accessory state which is either detached or attached */ |
| if (curr_adc == MAX77693_MUIC_ADC_OPEN) |
| attached = false; |
| |
| ret = max77693_muic_adc_handler(info, curr_adc, attached); |
| 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 */ |
| curr_chg_type = info->status[1] & STATUS2_CHGTYP_MASK; |
| curr_chg_type >>= STATUS2_CHGTYP_SHIFT; |
| |
| /* Check charger accessory state which |
| is either detached or attached */ |
| if (curr_chg_type == MAX77693_CHARGER_TYPE_NONE) |
| attached = false; |
| |
| ret = max77693_muic_chg_handler(info, curr_chg_type, attached); |
| 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); |
| break; |
| } |
| |
| if (ret < 0) |
| dev_err(info->dev, "failed to handle MUIC interrupt\n"); |
| |
| mutex_unlock(&info->mutex); |
| |
| return; |
| } |
| |
| 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 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, chg_type; |
| |
| mutex_lock(&info->mutex); |
| |
| /* Read STATUSx register to detect accessory */ |
| ret = max77693_bulk_read(info->max77693->regmap_muic, |
| MAX77693_MUIC_REG_STATUS1, 2, info->status); |
| if (ret) { |
| dev_err(info->dev, "failed to read MUIC register\n"); |
| mutex_unlock(&info->mutex); |
| return -EINVAL; |
| } |
| |
| adc = info->status[0] & STATUS1_ADC_MASK; |
| adc >>= STATUS1_ADC_SHIFT; |
| |
| if (adc != MAX77693_MUIC_ADC_OPEN) { |
| dev_info(info->dev, |
| "external connector is attached (adc:0x%02x)\n", adc); |
| |
| ret = max77693_muic_adc_handler(info, adc, true); |
| if (ret < 0) |
| dev_err(info->dev, "failed to detect accessory\n"); |
| goto out; |
| } |
| |
| chg_type = info->status[1] & STATUS2_CHGTYP_MASK; |
| chg_type >>= STATUS2_CHGTYP_SHIFT; |
| |
| if (chg_type != MAX77693_CHARGER_TYPE_NONE) { |
| dev_info(info->dev, |
| "external connector is attached (chg_type:0x%x)\n", |
| chg_type); |
| |
| max77693_muic_chg_handler(info, chg_type, true); |
| if (ret < 0) |
| dev_err(info->dev, "failed to detect charger accessory\n"); |
| } |
| |
| out: |
| mutex_unlock(&info->mutex); |
| return ret; |
| } |
| |
| 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_platform_data *muic_pdata = pdata->muic_data; |
| struct max77693_muic_info *info; |
| int ret, i; |
| u8 id; |
| |
| info = kzalloc(sizeof(struct max77693_muic_info), GFP_KERNEL); |
| if (!info) { |
| dev_err(&pdev->dev, "failed to allocate memory\n"); |
| ret = -ENOMEM; |
| goto err_kfree; |
| } |
| 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->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); |
| goto err_regmap; |
| } |
| } |
| platform_set_drvdata(pdev, info); |
| mutex_init(&info->mutex); |
| |
| INIT_WORK(&info->irq_work, max77693_muic_irq_work); |
| |
| /* 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 = 0; |
| |
| virq = irq_create_mapping(max77693->irq_domain, muic_irq->irq); |
| if (!virq) |
| goto err_irq; |
| muic_irq->virq = virq; |
| |
| ret = request_threaded_irq(virq, NULL, |
| max77693_muic_irq_handler, |
| IRQF_ONESHOT, muic_irq->name, info); |
| if (ret) { |
| dev_err(&pdev->dev, |
| "failed: irq request (IRQ: %d," |
| " error :%d)\n", |
| muic_irq->irq, ret); |
| |
| for (i = i - 1; i >= 0; i--) |
| free_irq(muic_irq->virq, info); |
| goto err_irq; |
| } |
| } |
| |
| /* Initialize extcon device */ |
| info->edev = kzalloc(sizeof(struct extcon_dev), GFP_KERNEL); |
| if (!info->edev) { |
| dev_err(&pdev->dev, "failed to allocate memory for extcon\n"); |
| ret = -ENOMEM; |
| goto err_irq; |
| } |
| info->edev->name = DEV_NAME; |
| info->edev->supported_cable = max77693_extcon_cable; |
| ret = extcon_dev_register(info->edev, NULL); |
| if (ret) { |
| dev_err(&pdev->dev, "failed to register extcon device\n"); |
| goto err_extcon; |
| } |
| |
| /* Initialize MUIC register by using platform data */ |
| for (i = 0 ; i < muic_pdata->num_init_data ; i++) { |
| enum max77693_irq_source irq_src = MAX77693_IRQ_GROUP_NR; |
| |
| max77693_write_reg(info->max77693->regmap_muic, |
| muic_pdata->init_data[i].addr, |
| muic_pdata->init_data[i].data); |
| |
| switch (muic_pdata->init_data[i].addr) { |
| case MAX77693_MUIC_REG_INTMASK1: |
| irq_src = MUIC_INT1; |
| break; |
| case MAX77693_MUIC_REG_INTMASK2: |
| irq_src = MUIC_INT2; |
| break; |
| case MAX77693_MUIC_REG_INTMASK3: |
| irq_src = MUIC_INT3; |
| break; |
| } |
| |
| if (irq_src < MAX77693_IRQ_GROUP_NR) |
| info->max77693->irq_masks_cur[irq_src] |
| = muic_pdata->init_data[i].data; |
| } |
| |
| /* Check revision number of MUIC device*/ |
| ret = max77693_read_reg(info->max77693->regmap_muic, |
| MAX77693_MUIC_REG_ID, &id); |
| if (ret < 0) { |
| dev_err(&pdev->dev, "failed to read revision number\n"); |
| goto err_extcon; |
| } |
| 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 on boot */ |
| max77693_muic_detect_accessory(info); |
| |
| return ret; |
| |
| err_extcon: |
| kfree(info->edev); |
| err_irq: |
| err_regmap: |
| kfree(info); |
| err_kfree: |
| return ret; |
| } |
| |
| static int max77693_muic_remove(struct platform_device *pdev) |
| { |
| struct max77693_muic_info *info = platform_get_drvdata(pdev); |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) |
| free_irq(muic_irqs[i].virq, info); |
| cancel_work_sync(&info->irq_work); |
| extcon_dev_unregister(info->edev); |
| kfree(info->edev); |
| kfree(info); |
| |
| return 0; |
| } |
| |
| static struct platform_driver max77693_muic_driver = { |
| .driver = { |
| .name = DEV_NAME, |
| .owner = THIS_MODULE, |
| }, |
| .probe = max77693_muic_probe, |
| .remove = max77693_muic_remove, |
| }; |
| |
| module_platform_driver(max77693_muic_driver); |
| |
| MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver"); |
| MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>"); |
| MODULE_LICENSE("GPL"); |
| MODULE_ALIAS("platform:extcon-max77693"); |