// SPDX-License-Identifier: GPL-2.0+//// extcon-max77693.c - MAX77693 extcon driver to support MAX77693 MUIC//// Copyright (C) 2012 Samsung Electrnoics// Chanwoo Choi <cw00.choi@samsung.com> #include <linux/devm-helpers.h>#include <linux/kernel.h>#include <linux/module.h>#include <linux/i2c.h>#include <linux/slab.h>#include <linux/input.h>#include <linux/interrupt.h>#include <linux/err.h>#include <linux/platform_device.h>#include <linux/mfd/max77693.h>#include <linux/mfd/max77693-common.h>#include <linux/mfd/max77693-private.h>#include <linux/extcon-provider.h>#include <linux/regmap.h>#include <linux/irqdomain.h> #define DEV_NAME "max77693-muic"#define DELAY_MS_DEFAULT 20000 /* unit: millisecond */ /* * Default value of MAX77693 register to bring up MUIC device. * If user don't set some initial value for MUIC device through platform data, * extcon-max77693 driver use 'default_init_data' to bring up base operation * of MAX77693 MUIC device. */static struct max77693_reg_data default_init_data[] = { { /* STATUS2 - [3]ChgDetRun */ .addr = MAX77693_MUIC_REG_STATUS2, .data = MAX77693_STATUS2_CHGDETRUN_MASK, }, { /* INTMASK1 - Unmask [3]ADC1KM,[0]ADCM */ .addr = MAX77693_MUIC_REG_INTMASK1, .data = INTMASK1_ADC1K_MASK | INTMASK1_ADC_MASK, }, { /* INTMASK2 - Unmask [0]ChgTypM */ .addr = MAX77693_MUIC_REG_INTMASK2, .data = INTMASK2_CHGTYP_MASK, }, { /* INTMASK3 - Mask all of interrupts */ .addr = MAX77693_MUIC_REG_INTMASK3, .data = 0x0, }, { /* CDETCTRL2 */ .addr = MAX77693_MUIC_REG_CDETCTRL2, .data = CDETCTRL2_VIDRMEN_MASK | CDETCTRL2_DXOVPEN_MASK, },}; 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_cable_type; int prev_cable_type_gnd; int prev_chg_type; int prev_button_type; u8 status[2]; int irq; struct work_struct irq_work; struct mutex mutex; /* * 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. */ struct delayed_work wq_detcable; /* Button of dock device */ struct input_dev *dock; /* * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB * h/w path of COMP2/COMN1 on CONTROL1 register. */ int path_usb; int path_uart;}; enum max77693_muic_cable_group { MAX77693_CABLE_GROUP_ADC = 0, MAX77693_CABLE_GROUP_ADC_GND, MAX77693_CABLE_GROUP_CHG, MAX77693_CABLE_GROUP_VBVOLT,}; 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. */ /* ADC|VBVolot|ADCLow|ADC1K| */ MAX77693_MUIC_GND_USB_HOST = 0x100, /* 0x0| 0| 0| 0| */ MAX77693_MUIC_GND_USB_HOST_VB = 0x104, /* 0x0| 1| 0| 0| */ MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* 0x0| 0| 1| 0| */ MAX77693_MUIC_GND_MHL = 0x103, /* 0x0| 0| 1| 1| */ MAX77693_MUIC_GND_MHL_VB = 0x107, /* 0x0| 1| 1| 1| */}; /* * MAX77693 MUIC device support below list of accessories(external connector) */static const unsigned int max77693_extcon_cable[] = { EXTCON_USB, EXTCON_USB_HOST, EXTCON_CHG_USB_SDP, EXTCON_CHG_USB_DCP, EXTCON_CHG_USB_FAST, EXTCON_CHG_USB_SLOW, EXTCON_CHG_USB_CDP, EXTCON_DISP_MHL, EXTCON_JIG, EXTCON_DOCK, EXTCON_NONE,}; /* * max77693_muic_set_debounce_time - Set the debounce time of ADC * @info: the instance including private data of max77693 MUIC * @time: the debounce time of ADC */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: /* * Don't touch BTLDset, JIGset when you want to change adc * debounce time. If it writes other than 0 to BTLDset, JIGset * muic device will be reset and loose current state. */ ret = regmap_write(info->max77693->regmap_muic, MAX77693_MUIC_REG_CTRL3, time << MAX77693_CONTROL3_ADCDBSET_SHIFT); if (ret) { dev_err(info->dev, "failed to set ADC debounce time\n"); return ret; } break; default: dev_err(info->dev, "invalid ADC debounce time\n"); return -EINVAL; } return 0;}; /* * max77693_muic_set_path - Set hardware line according to attached cable * @info: the instance including private data of max77693 MUIC * @value: the path according to attached cable * @attached: the state of cable (true:attached, false:detached) * * The max77693 MUIC device share outside H/W line among a varity of cables * so, this function set internal path of H/W line according to the type of * attached cable. */static int max77693_muic_set_path(struct max77693_muic_info *info, u8 val, bool attached){ int ret; unsigned int ctrl1, ctrl2 = 0; if (attached) ctrl1 = val; else ctrl1 = MAX77693_CONTROL1_SW_OPEN; ret = regmap_update_bits(info->max77693->regmap_muic, MAX77693_MUIC_REG_CTRL1, COMP_SW_MASK, ctrl1); if (ret < 0) { dev_err(info->dev, "failed to update MUIC register\n"); return ret; } if (attached) ctrl2 |= MAX77693_CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */ else ctrl2 |= MAX77693_CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */ ret = regmap_update_bits(info->max77693->regmap_muic, MAX77693_MUIC_REG_CTRL2, MAX77693_CONTROL2_LOWPWR_MASK | MAX77693_CONTROL2_CPEN_MASK, ctrl2); if (ret < 0) { dev_err(info->dev, "failed to update MUIC register\n"); return ret; } dev_info(info->dev, "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n", ctrl1, ctrl2, attached ? "attached" : "detached"); return 0;} /* * max77693_muic_get_cable_type - Return cable type and check cable state * @info: the instance including private data of max77693 MUIC * @group: the path according to attached cable * @attached: store cable state and return * * This function check the cable state either attached or detached, * and then divide precise type of cable according to cable group. * - MAX77693_CABLE_GROUP_ADC * - MAX77693_CABLE_GROUP_ADC_GND * - MAX77693_CABLE_GROUP_CHG * - MAX77693_CABLE_GROUP_VBVOLT */static int max77693_muic_get_cable_type(struct max77693_muic_info *info, enum max77693_muic_cable_group group, bool *attached){ int cable_type = 0; int adc; int adc1k; int adclow; int vbvolt; int chg_type; switch (group) { case MAX77693_CABLE_GROUP_ADC: /* * Read ADC value to check cable type and decide cable state * according to cable type */ adc = info->status[0] & MAX77693_STATUS1_ADC_MASK; adc >>= MAX77693_STATUS1_ADC_SHIFT; /* * Check current cable state/cable type and store cable type * (info->prev_cable_type) for handling cable when cable is * detached. */ if (adc == MAX77693_MUIC_ADC_OPEN) { *attached = false; cable_type = info->prev_cable_type; info->prev_cable_type = MAX77693_MUIC_ADC_OPEN; } else { *attached = true; cable_type = info->prev_cable_type = adc; } break; case MAX77693_CABLE_GROUP_ADC_GND: /* * Read ADC value to check cable type and decide cable state * according to cable type */ adc = info->status[0] & MAX77693_STATUS1_ADC_MASK; adc >>= MAX77693_STATUS1_ADC_SHIFT; /* * Check current cable state/cable type and store cable type * (info->prev_cable_type/_gnd) for handling cable when cable * is detached. */ if (adc == MAX77693_MUIC_ADC_OPEN) { *attached = false; cable_type = info->prev_cable_type_gnd; info->prev_cable_type_gnd = MAX77693_MUIC_ADC_OPEN; } else { *attached = true; adclow = info->status[0] & MAX77693_STATUS1_ADCLOW_MASK; adclow >>= MAX77693_STATUS1_ADCLOW_SHIFT; adc1k = info->status[0] & MAX77693_STATUS1_ADC1K_MASK; adc1k >>= MAX77693_STATUS1_ADC1K_SHIFT; vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK; vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT; /** * [0x1|VBVolt|ADCLow|ADC1K] * [0x1| 0| 0| 0] USB_HOST * [0x1| 1| 0| 0] USB_HSOT_VB * [0x1| 0| 1| 0] Audio Video cable with load * [0x1| 0| 1| 1] MHL without charging cable * [0x1| 1| 1| 1] MHL with charging cable */ cable_type = ((0x1 << 8) | (vbvolt << 2) | (adclow << 1) | adc1k); info->prev_cable_type = adc; info->prev_cable_type_gnd = cable_type; } break; case MAX77693_CABLE_GROUP_CHG: /* * Read charger type to check cable type and decide cable state * according to type of charger cable. */ chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK; chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT; if (chg_type == MAX77693_CHARGER_TYPE_NONE) { *attached = false; cable_type = info->prev_chg_type; info->prev_chg_type = MAX77693_CHARGER_TYPE_NONE; } else { *attached = true; /* * Check current cable state/cable type and store cable * type(info->prev_chg_type) for handling cable when * charger cable is detached. */ cable_type = info->prev_chg_type = chg_type; } break; case MAX77693_CABLE_GROUP_VBVOLT: /* * Read ADC value to check cable type and decide cable state * according to cable type */ adc = info->status[0] & MAX77693_STATUS1_ADC_MASK; adc >>= MAX77693_STATUS1_ADC_SHIFT; chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK; chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT; if (adc == MAX77693_MUIC_ADC_OPEN && chg_type == MAX77693_CHARGER_TYPE_NONE) *attached = false; else *attached = true; /* * Read vbvolt field, if vbvolt is 1, * this cable is used for charging. */ vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK; vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT; cable_type = vbvolt; break; default: dev_err(info->dev, "Unknown cable group (%d)\n", group); cable_type = -EINVAL; break; } return cable_type;} static int max77693_muic_dock_handler(struct max77693_muic_info *info, int cable_type, bool attached){ int ret = 0; int vbvolt; bool cable_attached; unsigned int dock_id; dev_info(info->dev, "external connector is %s (adc:0x%02x)\n", attached ? "attached" : "detached", cable_type); switch (cable_type) { case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */ /* * Check power cable whether attached or detached state. * The Dock-Smart device need surely external power supply. * If power cable(USB/TA) isn't connected to Dock device, * user can't use Dock-Smart for desktop mode. */ vbvolt = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_VBVOLT, &cable_attached); if (attached && !vbvolt) { dev_warn(info->dev, "Cannot detect external power supply\n"); return 0; } /* * Notify Dock/MHL state. * - Dock device include three type of cable which * are HDMI, USB for mouse/keyboard and micro-usb port * for USB/TA cable. Dock device need always exteranl * power supply(USB/TA cable through micro-usb cable). Dock * device support screen output of target to separate * monitor and mouse/keyboard for desktop mode. * * Features of 'USB/TA cable with Dock 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; Lines 1–500 of 1280. Load more
// SPDX-License-Identifier: GPL-2.0+ // // extcon-max77693.c - MAX77693 extcon driver to support MAX77693 MUIC // // Copyright (C) 2012 Samsung Electrnoics // Chanwoo Choi <cw00.choi@samsung.com> #include <linux/devm-helpers.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/i2c.h> #include <linux/slab.h> #include <linux/input.h> #include <linux/interrupt.h> #include <linux/err.h> #include <linux/platform_device.h> #include <linux/mfd/max77693.h> #include <linux/mfd/max77693-common.h> #include <linux/mfd/max77693-private.h> #include <linux/extcon-provider.h> #include <linux/regmap.h> #include <linux/irqdomain.h> #define DEV_NAME "max77693-muic" #define DELAY_MS_DEFAULT 20000 /* unit: millisecond */ /* * Default value of MAX77693 register to bring up MUIC device. * If user don't set some initial value for MUIC device through platform data, * extcon-max77693 driver use 'default_init_data' to bring up base operation * of MAX77693 MUIC device. */ static struct max77693_reg_data default_init_data[] = { { /* STATUS2 - [3]ChgDetRun */ .addr = MAX77693_MUIC_REG_STATUS2, .data = MAX77693_STATUS2_CHGDETRUN_MASK, }, { /* INTMASK1 - Unmask [3]ADC1KM,[0]ADCM */ .addr = MAX77693_MUIC_REG_INTMASK1, .data = INTMASK1_ADC1K_MASK | INTMASK1_ADC_MASK, }, { /* INTMASK2 - Unmask [0]ChgTypM */ .addr = MAX77693_MUIC_REG_INTMASK2, .data = INTMASK2_CHGTYP_MASK, }, { /* INTMASK3 - Mask all of interrupts */ .addr = MAX77693_MUIC_REG_INTMASK3, .data = 0x0, }, { /* CDETCTRL2 */ .addr = MAX77693_MUIC_REG_CDETCTRL2, .data = CDETCTRL2_VIDRMEN_MASK | CDETCTRL2_DXOVPEN_MASK, }, }; 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_cable_type; int prev_cable_type_gnd; int prev_chg_type; int prev_button_type; u8 status[2]; int irq; struct work_struct irq_work; struct mutex mutex; /* * 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. */ struct delayed_work wq_detcable; /* Button of dock device */ struct input_dev *dock; /* * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB * h/w path of COMP2/COMN1 on CONTROL1 register. */ int path_usb; int path_uart; }; enum max77693_muic_cable_group { MAX77693_CABLE_GROUP_ADC = 0, MAX77693_CABLE_GROUP_ADC_GND, MAX77693_CABLE_GROUP_CHG, MAX77693_CABLE_GROUP_VBVOLT, }; 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. */ /* ADC|VBVolot|ADCLow|ADC1K| */ MAX77693_MUIC_GND_USB_HOST = 0x100, /* 0x0| 0| 0| 0| */ MAX77693_MUIC_GND_USB_HOST_VB = 0x104, /* 0x0| 1| 0| 0| */ MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* 0x0| 0| 1| 0| */ MAX77693_MUIC_GND_MHL = 0x103, /* 0x0| 0| 1| 1| */ MAX77693_MUIC_GND_MHL_VB = 0x107, /* 0x0| 1| 1| 1| */ }; /* * MAX77693 MUIC device support below list of accessories(external connector) */ static const unsigned int max77693_extcon_cable[] = { EXTCON_USB, EXTCON_USB_HOST, EXTCON_CHG_USB_SDP, EXTCON_CHG_USB_DCP, EXTCON_CHG_USB_FAST, EXTCON_CHG_USB_SLOW, EXTCON_CHG_USB_CDP, EXTCON_DISP_MHL, EXTCON_JIG, EXTCON_DOCK, EXTCON_NONE, }; /* * max77693_muic_set_debounce_time - Set the debounce time of ADC * @info: the instance including private data of max77693 MUIC * @time: the debounce time of ADC */ 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: /* * Don't touch BTLDset, JIGset when you want to change adc * debounce time. If it writes other than 0 to BTLDset, JIGset * muic device will be reset and loose current state. */ ret = regmap_write(info->max77693->regmap_muic, MAX77693_MUIC_REG_CTRL3, time << MAX77693_CONTROL3_ADCDBSET_SHIFT); if (ret) { dev_err(info->dev, "failed to set ADC debounce time\n"); return ret; } break; default: dev_err(info->dev, "invalid ADC debounce time\n"); return -EINVAL; } return 0; }; /* * max77693_muic_set_path - Set hardware line according to attached cable * @info: the instance including private data of max77693 MUIC * @value: the path according to attached cable * @attached: the state of cable (true:attached, false:detached) * * The max77693 MUIC device share outside H/W line among a varity of cables * so, this function set internal path of H/W line according to the type of * attached cable. */ static int max77693_muic_set_path(struct max77693_muic_info *info, u8 val, bool attached) { int ret; unsigned int ctrl1, ctrl2 = 0; if (attached) ctrl1 = val; else ctrl1 = MAX77693_CONTROL1_SW_OPEN; ret = regmap_update_bits(info->max77693->regmap_muic, MAX77693_MUIC_REG_CTRL1, COMP_SW_MASK, ctrl1); if (ret < 0) { dev_err(info->dev, "failed to update MUIC register\n"); return ret; } if (attached) ctrl2 |= MAX77693_CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */ else ctrl2 |= MAX77693_CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */ ret = regmap_update_bits(info->max77693->regmap_muic, MAX77693_MUIC_REG_CTRL2, MAX77693_CONTROL2_LOWPWR_MASK | MAX77693_CONTROL2_CPEN_MASK, ctrl2); if (ret < 0) { dev_err(info->dev, "failed to update MUIC register\n"); return ret; } dev_info(info->dev, "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n", ctrl1, ctrl2, attached ? "attached" : "detached"); return 0; } /* * max77693_muic_get_cable_type - Return cable type and check cable state * @info: the instance including private data of max77693 MUIC * @group: the path according to attached cable * @attached: store cable state and return * * This function check the cable state either attached or detached, * and then divide precise type of cable according to cable group. * - MAX77693_CABLE_GROUP_ADC * - MAX77693_CABLE_GROUP_ADC_GND * - MAX77693_CABLE_GROUP_CHG * - MAX77693_CABLE_GROUP_VBVOLT */ static int max77693_muic_get_cable_type(struct max77693_muic_info *info, enum max77693_muic_cable_group group, bool *attached) { int cable_type = 0; int adc; int adc1k; int adclow; int vbvolt; int chg_type; switch (group) { case MAX77693_CABLE_GROUP_ADC: /* * Read ADC value to check cable type and decide cable state * according to cable type */ adc = info->status[0] & MAX77693_STATUS1_ADC_MASK; adc >>= MAX77693_STATUS1_ADC_SHIFT; /* * Check current cable state/cable type and store cable type * (info->prev_cable_type) for handling cable when cable is * detached. */ if (adc == MAX77693_MUIC_ADC_OPEN) { *attached = false; cable_type = info->prev_cable_type; info->prev_cable_type = MAX77693_MUIC_ADC_OPEN; } else { *attached = true; cable_type = info->prev_cable_type = adc; } break; case MAX77693_CABLE_GROUP_ADC_GND: /* * Read ADC value to check cable type and decide cable state * according to cable type */ adc = info->status[0] & MAX77693_STATUS1_ADC_MASK; adc >>= MAX77693_STATUS1_ADC_SHIFT; /* * Check current cable state/cable type and store cable type * (info->prev_cable_type/_gnd) for handling cable when cable * is detached. */ if (adc == MAX77693_MUIC_ADC_OPEN) { *attached = false; cable_type = info->prev_cable_type_gnd; info->prev_cable_type_gnd = MAX77693_MUIC_ADC_OPEN; } else { *attached = true; adclow = info->status[0] & MAX77693_STATUS1_ADCLOW_MASK; adclow >>= MAX77693_STATUS1_ADCLOW_SHIFT; adc1k = info->status[0] & MAX77693_STATUS1_ADC1K_MASK; adc1k >>= MAX77693_STATUS1_ADC1K_SHIFT; vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK; vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT; /** * [0x1|VBVolt|ADCLow|ADC1K] * [0x1| 0| 0| 0] USB_HOST * [0x1| 1| 0| 0] USB_HSOT_VB * [0x1| 0| 1| 0] Audio Video cable with load * [0x1| 0| 1| 1] MHL without charging cable * [0x1| 1| 1| 1] MHL with charging cable */ cable_type = ((0x1 << 8) | (vbvolt << 2) | (adclow << 1) | adc1k); info->prev_cable_type = adc; info->prev_cable_type_gnd = cable_type; } break; case MAX77693_CABLE_GROUP_CHG: /* * Read charger type to check cable type and decide cable state * according to type of charger cable. */ chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK; chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT; if (chg_type == MAX77693_CHARGER_TYPE_NONE) { *attached = false; cable_type = info->prev_chg_type; info->prev_chg_type = MAX77693_CHARGER_TYPE_NONE; } else { *attached = true; /* * Check current cable state/cable type and store cable * type(info->prev_chg_type) for handling cable when * charger cable is detached. */ cable_type = info->prev_chg_type = chg_type; } break; case MAX77693_CABLE_GROUP_VBVOLT: /* * Read ADC value to check cable type and decide cable state * according to cable type */ adc = info->status[0] & MAX77693_STATUS1_ADC_MASK; adc >>= MAX77693_STATUS1_ADC_SHIFT; chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK; chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT; if (adc == MAX77693_MUIC_ADC_OPEN && chg_type == MAX77693_CHARGER_TYPE_NONE) *attached = false; else *attached = true; /* * Read vbvolt field, if vbvolt is 1, * this cable is used for charging. */ vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK; vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT; cable_type = vbvolt; break; default: dev_err(info->dev, "Unknown cable group (%d)\n", group); cable_type = -EINVAL; break; } return cable_type; } static int max77693_muic_dock_handler(struct max77693_muic_info *info, int cable_type, bool attached) { int ret = 0; int vbvolt; bool cable_attached; unsigned int dock_id; dev_info(info->dev, "external connector is %s (adc:0x%02x)\n", attached ? "attached" : "detached", cable_type); switch (cable_type) { case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */ /* * Check power cable whether attached or detached state. * The Dock-Smart device need surely external power supply. * If power cable(USB/TA) isn't connected to Dock device, * user can't use Dock-Smart for desktop mode. */ vbvolt = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_VBVOLT, &cable_attached); if (attached && !vbvolt) { dev_warn(info->dev, "Cannot detect external power supply\n"); return 0; } /* * Notify Dock/MHL state. * - Dock device include three type of cable which * are HDMI, USB for mouse/keyboard and micro-usb port * for USB/TA cable. Dock device need always exteranl * power supply(USB/TA cable through micro-usb cable). Dock * device support screen output of target to separate * monitor and mouse/keyboard for desktop mode. * * Features of 'USB/TA cable with Dock 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;