// SPDX-License-Identifier: GPL-2.0+//// extcon-max14577.c - MAX14577/77836 extcon driver to support MUIC//// Copyright (C) 2013,2014 Samsung Electronics// Chanwoo Choi <cw00.choi@samsung.com>// Krzysztof Kozlowski <krzk@kernel.org> #include <linux/devm-helpers.h>#include <linux/kernel.h>#include <linux/module.h>#include <linux/i2c.h>#include <linux/interrupt.h>#include <linux/platform_device.h>#include <linux/mfd/max14577.h>#include <linux/mfd/max14577-private.h>#include <linux/extcon-provider.h> #define DELAY_MS_DEFAULT 17000 /* unit: millisecond */ enum max14577_muic_adc_debounce_time { ADC_DEBOUNCE_TIME_5MS = 0, ADC_DEBOUNCE_TIME_10MS, ADC_DEBOUNCE_TIME_25MS, ADC_DEBOUNCE_TIME_38_62MS,}; enum max14577_muic_status { MAX14577_MUIC_STATUS1 = 0, MAX14577_MUIC_STATUS2 = 1, MAX14577_MUIC_STATUS_END,}; /** * struct max14577_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 max14577_muic_irq { unsigned int irq; const char *name; unsigned int virq;}; static struct max14577_muic_irq max14577_muic_irqs[] = { { MAX14577_IRQ_INT1_ADC, "muic-ADC" }, { MAX14577_IRQ_INT1_ADCLOW, "muic-ADCLOW" }, { MAX14577_IRQ_INT1_ADCERR, "muic-ADCError" }, { MAX14577_IRQ_INT2_CHGTYP, "muic-CHGTYP" }, { MAX14577_IRQ_INT2_CHGDETRUN, "muic-CHGDETRUN" }, { MAX14577_IRQ_INT2_DCDTMR, "muic-DCDTMR" }, { MAX14577_IRQ_INT2_DBCHG, "muic-DBCHG" }, { MAX14577_IRQ_INT2_VBVOLT, "muic-VBVOLT" },}; static struct max14577_muic_irq max77836_muic_irqs[] = { { MAX14577_IRQ_INT1_ADC, "muic-ADC" }, { MAX14577_IRQ_INT1_ADCLOW, "muic-ADCLOW" }, { MAX14577_IRQ_INT1_ADCERR, "muic-ADCError" }, { MAX77836_IRQ_INT1_ADC1K, "muic-ADC1K" }, { MAX14577_IRQ_INT2_CHGTYP, "muic-CHGTYP" }, { MAX14577_IRQ_INT2_CHGDETRUN, "muic-CHGDETRUN" }, { MAX14577_IRQ_INT2_DCDTMR, "muic-DCDTMR" }, { MAX14577_IRQ_INT2_DBCHG, "muic-DBCHG" }, { MAX14577_IRQ_INT2_VBVOLT, "muic-VBVOLT" }, { MAX77836_IRQ_INT2_VIDRM, "muic-VIDRM" },}; struct max14577_muic_info { struct device *dev; struct max14577 *max14577; struct extcon_dev *edev; int prev_cable_type; int prev_chg_type; u8 status[MAX14577_MUIC_STATUS_END]; struct max14577_muic_irq *muic_irqs; unsigned int muic_irqs_num; bool irq_adc; bool irq_chg; 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; /* * 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 max14577_muic_cable_group { MAX14577_CABLE_GROUP_ADC = 0, MAX14577_CABLE_GROUP_CHG,}; /* Define supported accessory type */enum max14577_muic_acc_type { MAX14577_MUIC_ADC_GROUND = 0x0, MAX14577_MUIC_ADC_SEND_END_BUTTON, MAX14577_MUIC_ADC_REMOTE_S1_BUTTON, MAX14577_MUIC_ADC_REMOTE_S2_BUTTON, MAX14577_MUIC_ADC_REMOTE_S3_BUTTON, MAX14577_MUIC_ADC_REMOTE_S4_BUTTON, MAX14577_MUIC_ADC_REMOTE_S5_BUTTON, MAX14577_MUIC_ADC_REMOTE_S6_BUTTON, MAX14577_MUIC_ADC_REMOTE_S7_BUTTON, MAX14577_MUIC_ADC_REMOTE_S8_BUTTON, MAX14577_MUIC_ADC_REMOTE_S9_BUTTON, MAX14577_MUIC_ADC_REMOTE_S10_BUTTON, MAX14577_MUIC_ADC_REMOTE_S11_BUTTON, MAX14577_MUIC_ADC_REMOTE_S12_BUTTON, MAX14577_MUIC_ADC_RESERVED_ACC_1, MAX14577_MUIC_ADC_RESERVED_ACC_2, MAX14577_MUIC_ADC_RESERVED_ACC_3, MAX14577_MUIC_ADC_RESERVED_ACC_4, MAX14577_MUIC_ADC_RESERVED_ACC_5, MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE2, MAX14577_MUIC_ADC_PHONE_POWERED_DEV, MAX14577_MUIC_ADC_TTY_CONVERTER, MAX14577_MUIC_ADC_UART_CABLE, MAX14577_MUIC_ADC_CEA936A_TYPE1_CHG, MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF, MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON, MAX14577_MUIC_ADC_AV_CABLE_NOLOAD, MAX14577_MUIC_ADC_CEA936A_TYPE2_CHG, MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF, MAX14577_MUIC_ADC_FACTORY_MODE_UART_ON, MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE1, /* with Remote and Simple Ctrl */ MAX14577_MUIC_ADC_OPEN,}; static const unsigned int max14577_extcon_cable[] = { EXTCON_USB, EXTCON_CHG_USB_SDP, EXTCON_CHG_USB_DCP, EXTCON_CHG_USB_FAST, EXTCON_CHG_USB_SLOW, EXTCON_CHG_USB_CDP, EXTCON_JIG, EXTCON_NONE,}; /* * max14577_muic_set_debounce_time - Set the debounce time of ADC * @info: the instance including private data of max14577 MUIC * @time: the debounce time of ADC */static int max14577_muic_set_debounce_time(struct max14577_muic_info *info, enum max14577_muic_adc_debounce_time time){ u8 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 = max14577_update_reg(info->max14577->regmap, MAX14577_MUIC_REG_CONTROL3, CTRL3_ADCDBSET_MASK, time << CTRL3_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;}; /* * max14577_muic_set_path - Set hardware line according to attached cable * @info: the instance including private data of max14577 MUIC * @value: the path according to attached cable * @attached: the state of cable (true:attached, false:detached) * * The max14577 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 max14577_muic_set_path(struct max14577_muic_info *info, u8 val, bool attached){ u8 ctrl1, ctrl2 = 0; int ret; /* Set open state to path before changing hw path */ ret = max14577_update_reg(info->max14577->regmap, MAX14577_MUIC_REG_CONTROL1, CLEAR_IDBEN_MICEN_MASK, CTRL1_SW_OPEN); if (ret < 0) { dev_err(info->dev, "failed to update MUIC register\n"); return ret; } if (attached) ctrl1 = val; else ctrl1 = CTRL1_SW_OPEN; ret = max14577_update_reg(info->max14577->regmap, MAX14577_MUIC_REG_CONTROL1, CLEAR_IDBEN_MICEN_MASK, ctrl1); if (ret < 0) { dev_err(info->dev, "failed to update MUIC register\n"); return ret; } if (attached) ctrl2 |= CTRL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */ else ctrl2 |= CTRL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */ ret = max14577_update_reg(info->max14577->regmap, MAX14577_REG_CONTROL2, CTRL2_LOWPWR_MASK | CTRL2_CPEN_MASK, ctrl2); if (ret < 0) { dev_err(info->dev, "failed to update MUIC register\n"); return ret; } dev_dbg(info->dev, "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n", ctrl1, ctrl2, attached ? "attached" : "detached"); return 0;} /* * max14577_muic_get_cable_type - Return cable type and check cable state * @info: the instance including private data of max14577 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. * - max14577_CABLE_GROUP_ADC * - max14577_CABLE_GROUP_CHG */static int max14577_muic_get_cable_type(struct max14577_muic_info *info, enum max14577_muic_cable_group group, bool *attached){ int cable_type = 0; int adc; int chg_type; switch (group) { case MAX14577_CABLE_GROUP_ADC: /* * Read ADC value to check cable type and decide cable state * according to cable type */ adc = info->status[MAX14577_MUIC_STATUS1] & STATUS1_ADC_MASK; adc >>= 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 == MAX14577_MUIC_ADC_OPEN) { *attached = false; cable_type = info->prev_cable_type; info->prev_cable_type = MAX14577_MUIC_ADC_OPEN; } else { *attached = true; cable_type = info->prev_cable_type = adc; } break; case MAX14577_CABLE_GROUP_CHG: /* * Read charger type to check cable type and decide cable state * according to type of charger cable. */ chg_type = info->status[MAX14577_MUIC_STATUS2] & STATUS2_CHGTYP_MASK; chg_type >>= STATUS2_CHGTYP_SHIFT; if (chg_type == MAX14577_CHARGER_TYPE_NONE) { *attached = false; cable_type = info->prev_chg_type; info->prev_chg_type = MAX14577_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; default: dev_err(info->dev, "Unknown cable group (%d)\n", group); cable_type = -EINVAL; break; } return cable_type;} static int max14577_muic_jig_handler(struct max14577_muic_info *info, int cable_type, bool attached){ int ret = 0; u8 path = CTRL1_SW_OPEN; dev_dbg(info->dev, "external connector is %s (adc:0x%02x)\n", attached ? "attached" : "detached", cable_type); switch (cable_type) { case MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF: /* ADC_JIG_USB_OFF */ case MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON: /* ADC_JIG_USB_ON */ /* PATH:AP_USB */ path = CTRL1_SW_USB; break; case MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF: /* ADC_JIG_UART_OFF */ /* PATH:AP_UART */ path = CTRL1_SW_UART; break; default: dev_err(info->dev, "failed to detect %s jig cable\n", attached ? "attached" : "detached"); return -EINVAL; } ret = max14577_muic_set_path(info, path, attached); if (ret < 0) return ret; extcon_set_state_sync(info->edev, EXTCON_JIG, attached); return 0;} static int max14577_muic_adc_handler(struct max14577_muic_info *info){ int cable_type; bool attached; int ret = 0; /* Check accessory state which is either detached or attached */ cable_type = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_ADC, &attached); dev_dbg(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 MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF: case MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON: case MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF: /* JIG */ ret = max14577_muic_jig_handler(info, cable_type, attached); if (ret < 0) return ret; break; case MAX14577_MUIC_ADC_GROUND: case MAX14577_MUIC_ADC_SEND_END_BUTTON: case MAX14577_MUIC_ADC_REMOTE_S1_BUTTON: case MAX14577_MUIC_ADC_REMOTE_S2_BUTTON: case MAX14577_MUIC_ADC_REMOTE_S3_BUTTON: case MAX14577_MUIC_ADC_REMOTE_S4_BUTTON: case MAX14577_MUIC_ADC_REMOTE_S5_BUTTON: case MAX14577_MUIC_ADC_REMOTE_S6_BUTTON: case MAX14577_MUIC_ADC_REMOTE_S7_BUTTON: case MAX14577_MUIC_ADC_REMOTE_S8_BUTTON: case MAX14577_MUIC_ADC_REMOTE_S9_BUTTON: case MAX14577_MUIC_ADC_REMOTE_S10_BUTTON: case MAX14577_MUIC_ADC_REMOTE_S11_BUTTON: case MAX14577_MUIC_ADC_REMOTE_S12_BUTTON: case MAX14577_MUIC_ADC_RESERVED_ACC_1: case MAX14577_MUIC_ADC_RESERVED_ACC_2: case MAX14577_MUIC_ADC_RESERVED_ACC_3: case MAX14577_MUIC_ADC_RESERVED_ACC_4: case MAX14577_MUIC_ADC_RESERVED_ACC_5: case MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE2: case MAX14577_MUIC_ADC_PHONE_POWERED_DEV: case MAX14577_MUIC_ADC_TTY_CONVERTER: case MAX14577_MUIC_ADC_UART_CABLE: case MAX14577_MUIC_ADC_CEA936A_TYPE1_CHG: case MAX14577_MUIC_ADC_AV_CABLE_NOLOAD: case MAX14577_MUIC_ADC_CEA936A_TYPE2_CHG: case MAX14577_MUIC_ADC_FACTORY_MODE_UART_ON: case MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE1: /* * 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 max14577_muic_chg_handler(struct max14577_muic_info *info){ int chg_type; bool attached; int ret = 0; chg_type = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_CHG, &attached); dev_dbg(info->dev, "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n", attached ? "attached" : "detached", chg_type, info->prev_chg_type); switch (chg_type) { case MAX14577_CHARGER_TYPE_USB: /* PATH:AP_USB */ ret = max14577_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 MAX14577_CHARGER_TYPE_DEDICATED_CHG: extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, attached); break; case MAX14577_CHARGER_TYPE_DOWNSTREAM_PORT: extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP, attached); break; case MAX14577_CHARGER_TYPE_SPECIAL_500MA: extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW, attached); break; case MAX14577_CHARGER_TYPE_SPECIAL_1A: extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST, attached); break; case MAX14577_CHARGER_TYPE_NONE: case MAX14577_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 max14577_muic_irq_work(struct work_struct *work){ struct max14577_muic_info *info = container_of(work, struct max14577_muic_info, irq_work); int ret = 0; if (!info->edev) return; mutex_lock(&info->mutex); ret = max14577_bulk_read(info->max14577->regmap, MAX14577_MUIC_REG_STATUS1, info->status, 2); if (ret) { dev_err(info->dev, "failed to read MUIC register\n"); mutex_unlock(&info->mutex); return; } if (info->irq_adc) {Lines 1–500 of 803. Load more
// SPDX-License-Identifier: GPL-2.0+ // // extcon-max14577.c - MAX14577/77836 extcon driver to support MUIC // // Copyright (C) 2013,2014 Samsung Electronics // Chanwoo Choi <cw00.choi@samsung.com> // Krzysztof Kozlowski <krzk@kernel.org> #include <linux/devm-helpers.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/i2c.h> #include <linux/interrupt.h> #include <linux/platform_device.h> #include <linux/mfd/max14577.h> #include <linux/mfd/max14577-private.h> #include <linux/extcon-provider.h> #define DELAY_MS_DEFAULT 17000 /* unit: millisecond */ enum max14577_muic_adc_debounce_time { ADC_DEBOUNCE_TIME_5MS = 0, ADC_DEBOUNCE_TIME_10MS, ADC_DEBOUNCE_TIME_25MS, ADC_DEBOUNCE_TIME_38_62MS, }; enum max14577_muic_status { MAX14577_MUIC_STATUS1 = 0, MAX14577_MUIC_STATUS2 = 1, MAX14577_MUIC_STATUS_END, }; /** * struct max14577_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 max14577_muic_irq { unsigned int irq; const char *name; unsigned int virq; }; static struct max14577_muic_irq max14577_muic_irqs[] = { { MAX14577_IRQ_INT1_ADC, "muic-ADC" }, { MAX14577_IRQ_INT1_ADCLOW, "muic-ADCLOW" }, { MAX14577_IRQ_INT1_ADCERR, "muic-ADCError" }, { MAX14577_IRQ_INT2_CHGTYP, "muic-CHGTYP" }, { MAX14577_IRQ_INT2_CHGDETRUN, "muic-CHGDETRUN" }, { MAX14577_IRQ_INT2_DCDTMR, "muic-DCDTMR" }, { MAX14577_IRQ_INT2_DBCHG, "muic-DBCHG" }, { MAX14577_IRQ_INT2_VBVOLT, "muic-VBVOLT" }, }; static struct max14577_muic_irq max77836_muic_irqs[] = { { MAX14577_IRQ_INT1_ADC, "muic-ADC" }, { MAX14577_IRQ_INT1_ADCLOW, "muic-ADCLOW" }, { MAX14577_IRQ_INT1_ADCERR, "muic-ADCError" }, { MAX77836_IRQ_INT1_ADC1K, "muic-ADC1K" }, { MAX14577_IRQ_INT2_CHGTYP, "muic-CHGTYP" }, { MAX14577_IRQ_INT2_CHGDETRUN, "muic-CHGDETRUN" }, { MAX14577_IRQ_INT2_DCDTMR, "muic-DCDTMR" }, { MAX14577_IRQ_INT2_DBCHG, "muic-DBCHG" }, { MAX14577_IRQ_INT2_VBVOLT, "muic-VBVOLT" }, { MAX77836_IRQ_INT2_VIDRM, "muic-VIDRM" }, }; struct max14577_muic_info { struct device *dev; struct max14577 *max14577; struct extcon_dev *edev; int prev_cable_type; int prev_chg_type; u8 status[MAX14577_MUIC_STATUS_END]; struct max14577_muic_irq *muic_irqs; unsigned int muic_irqs_num; bool irq_adc; bool irq_chg; 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; /* * 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 max14577_muic_cable_group { MAX14577_CABLE_GROUP_ADC = 0, MAX14577_CABLE_GROUP_CHG, }; /* Define supported accessory type */ enum max14577_muic_acc_type { MAX14577_MUIC_ADC_GROUND = 0x0, MAX14577_MUIC_ADC_SEND_END_BUTTON, MAX14577_MUIC_ADC_REMOTE_S1_BUTTON, MAX14577_MUIC_ADC_REMOTE_S2_BUTTON, MAX14577_MUIC_ADC_REMOTE_S3_BUTTON, MAX14577_MUIC_ADC_REMOTE_S4_BUTTON, MAX14577_MUIC_ADC_REMOTE_S5_BUTTON, MAX14577_MUIC_ADC_REMOTE_S6_BUTTON, MAX14577_MUIC_ADC_REMOTE_S7_BUTTON, MAX14577_MUIC_ADC_REMOTE_S8_BUTTON, MAX14577_MUIC_ADC_REMOTE_S9_BUTTON, MAX14577_MUIC_ADC_REMOTE_S10_BUTTON, MAX14577_MUIC_ADC_REMOTE_S11_BUTTON, MAX14577_MUIC_ADC_REMOTE_S12_BUTTON, MAX14577_MUIC_ADC_RESERVED_ACC_1, MAX14577_MUIC_ADC_RESERVED_ACC_2, MAX14577_MUIC_ADC_RESERVED_ACC_3, MAX14577_MUIC_ADC_RESERVED_ACC_4, MAX14577_MUIC_ADC_RESERVED_ACC_5, MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE2, MAX14577_MUIC_ADC_PHONE_POWERED_DEV, MAX14577_MUIC_ADC_TTY_CONVERTER, MAX14577_MUIC_ADC_UART_CABLE, MAX14577_MUIC_ADC_CEA936A_TYPE1_CHG, MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF, MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON, MAX14577_MUIC_ADC_AV_CABLE_NOLOAD, MAX14577_MUIC_ADC_CEA936A_TYPE2_CHG, MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF, MAX14577_MUIC_ADC_FACTORY_MODE_UART_ON, MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE1, /* with Remote and Simple Ctrl */ MAX14577_MUIC_ADC_OPEN, }; static const unsigned int max14577_extcon_cable[] = { EXTCON_USB, EXTCON_CHG_USB_SDP, EXTCON_CHG_USB_DCP, EXTCON_CHG_USB_FAST, EXTCON_CHG_USB_SLOW, EXTCON_CHG_USB_CDP, EXTCON_JIG, EXTCON_NONE, }; /* * max14577_muic_set_debounce_time - Set the debounce time of ADC * @info: the instance including private data of max14577 MUIC * @time: the debounce time of ADC */ static int max14577_muic_set_debounce_time(struct max14577_muic_info *info, enum max14577_muic_adc_debounce_time time) { u8 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 = max14577_update_reg(info->max14577->regmap, MAX14577_MUIC_REG_CONTROL3, CTRL3_ADCDBSET_MASK, time << CTRL3_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; }; /* * max14577_muic_set_path - Set hardware line according to attached cable * @info: the instance including private data of max14577 MUIC * @value: the path according to attached cable * @attached: the state of cable (true:attached, false:detached) * * The max14577 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 max14577_muic_set_path(struct max14577_muic_info *info, u8 val, bool attached) { u8 ctrl1, ctrl2 = 0; int ret; /* Set open state to path before changing hw path */ ret = max14577_update_reg(info->max14577->regmap, MAX14577_MUIC_REG_CONTROL1, CLEAR_IDBEN_MICEN_MASK, CTRL1_SW_OPEN); if (ret < 0) { dev_err(info->dev, "failed to update MUIC register\n"); return ret; } if (attached) ctrl1 = val; else ctrl1 = CTRL1_SW_OPEN; ret = max14577_update_reg(info->max14577->regmap, MAX14577_MUIC_REG_CONTROL1, CLEAR_IDBEN_MICEN_MASK, ctrl1); if (ret < 0) { dev_err(info->dev, "failed to update MUIC register\n"); return ret; } if (attached) ctrl2 |= CTRL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */ else ctrl2 |= CTRL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */ ret = max14577_update_reg(info->max14577->regmap, MAX14577_REG_CONTROL2, CTRL2_LOWPWR_MASK | CTRL2_CPEN_MASK, ctrl2); if (ret < 0) { dev_err(info->dev, "failed to update MUIC register\n"); return ret; } dev_dbg(info->dev, "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n", ctrl1, ctrl2, attached ? "attached" : "detached"); return 0; } /* * max14577_muic_get_cable_type - Return cable type and check cable state * @info: the instance including private data of max14577 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. * - max14577_CABLE_GROUP_ADC * - max14577_CABLE_GROUP_CHG */ static int max14577_muic_get_cable_type(struct max14577_muic_info *info, enum max14577_muic_cable_group group, bool *attached) { int cable_type = 0; int adc; int chg_type; switch (group) { case MAX14577_CABLE_GROUP_ADC: /* * Read ADC value to check cable type and decide cable state * according to cable type */ adc = info->status[MAX14577_MUIC_STATUS1] & STATUS1_ADC_MASK; adc >>= 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 == MAX14577_MUIC_ADC_OPEN) { *attached = false; cable_type = info->prev_cable_type; info->prev_cable_type = MAX14577_MUIC_ADC_OPEN; } else { *attached = true; cable_type = info->prev_cable_type = adc; } break; case MAX14577_CABLE_GROUP_CHG: /* * Read charger type to check cable type and decide cable state * according to type of charger cable. */ chg_type = info->status[MAX14577_MUIC_STATUS2] & STATUS2_CHGTYP_MASK; chg_type >>= STATUS2_CHGTYP_SHIFT; if (chg_type == MAX14577_CHARGER_TYPE_NONE) { *attached = false; cable_type = info->prev_chg_type; info->prev_chg_type = MAX14577_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; default: dev_err(info->dev, "Unknown cable group (%d)\n", group); cable_type = -EINVAL; break; } return cable_type; } static int max14577_muic_jig_handler(struct max14577_muic_info *info, int cable_type, bool attached) { int ret = 0; u8 path = CTRL1_SW_OPEN; dev_dbg(info->dev, "external connector is %s (adc:0x%02x)\n", attached ? "attached" : "detached", cable_type); switch (cable_type) { case MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF: /* ADC_JIG_USB_OFF */ case MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON: /* ADC_JIG_USB_ON */ /* PATH:AP_USB */ path = CTRL1_SW_USB; break; case MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF: /* ADC_JIG_UART_OFF */ /* PATH:AP_UART */ path = CTRL1_SW_UART; break; default: dev_err(info->dev, "failed to detect %s jig cable\n", attached ? "attached" : "detached"); return -EINVAL; } ret = max14577_muic_set_path(info, path, attached); if (ret < 0) return ret; extcon_set_state_sync(info->edev, EXTCON_JIG, attached); return 0; } static int max14577_muic_adc_handler(struct max14577_muic_info *info) { int cable_type; bool attached; int ret = 0; /* Check accessory state which is either detached or attached */ cable_type = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_ADC, &attached); dev_dbg(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 MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF: case MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON: case MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF: /* JIG */ ret = max14577_muic_jig_handler(info, cable_type, attached); if (ret < 0) return ret; break; case MAX14577_MUIC_ADC_GROUND: case MAX14577_MUIC_ADC_SEND_END_BUTTON: case MAX14577_MUIC_ADC_REMOTE_S1_BUTTON: case MAX14577_MUIC_ADC_REMOTE_S2_BUTTON: case MAX14577_MUIC_ADC_REMOTE_S3_BUTTON: case MAX14577_MUIC_ADC_REMOTE_S4_BUTTON: case MAX14577_MUIC_ADC_REMOTE_S5_BUTTON: case MAX14577_MUIC_ADC_REMOTE_S6_BUTTON: case MAX14577_MUIC_ADC_REMOTE_S7_BUTTON: case MAX14577_MUIC_ADC_REMOTE_S8_BUTTON: case MAX14577_MUIC_ADC_REMOTE_S9_BUTTON: case MAX14577_MUIC_ADC_REMOTE_S10_BUTTON: case MAX14577_MUIC_ADC_REMOTE_S11_BUTTON: case MAX14577_MUIC_ADC_REMOTE_S12_BUTTON: case MAX14577_MUIC_ADC_RESERVED_ACC_1: case MAX14577_MUIC_ADC_RESERVED_ACC_2: case MAX14577_MUIC_ADC_RESERVED_ACC_3: case MAX14577_MUIC_ADC_RESERVED_ACC_4: case MAX14577_MUIC_ADC_RESERVED_ACC_5: case MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE2: case MAX14577_MUIC_ADC_PHONE_POWERED_DEV: case MAX14577_MUIC_ADC_TTY_CONVERTER: case MAX14577_MUIC_ADC_UART_CABLE: case MAX14577_MUIC_ADC_CEA936A_TYPE1_CHG: case MAX14577_MUIC_ADC_AV_CABLE_NOLOAD: case MAX14577_MUIC_ADC_CEA936A_TYPE2_CHG: case MAX14577_MUIC_ADC_FACTORY_MODE_UART_ON: case MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE1: /* * 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 max14577_muic_chg_handler(struct max14577_muic_info *info) { int chg_type; bool attached; int ret = 0; chg_type = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_CHG, &attached); dev_dbg(info->dev, "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n", attached ? "attached" : "detached", chg_type, info->prev_chg_type); switch (chg_type) { case MAX14577_CHARGER_TYPE_USB: /* PATH:AP_USB */ ret = max14577_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 MAX14577_CHARGER_TYPE_DEDICATED_CHG: extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, attached); break; case MAX14577_CHARGER_TYPE_DOWNSTREAM_PORT: extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP, attached); break; case MAX14577_CHARGER_TYPE_SPECIAL_500MA: extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW, attached); break; case MAX14577_CHARGER_TYPE_SPECIAL_1A: extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST, attached); break; case MAX14577_CHARGER_TYPE_NONE: case MAX14577_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 max14577_muic_irq_work(struct work_struct *work) { struct max14577_muic_info *info = container_of(work, struct max14577_muic_info, irq_work); int ret = 0; if (!info->edev) return; mutex_lock(&info->mutex); ret = max14577_bulk_read(info->max14577->regmap, MAX14577_MUIC_REG_STATUS1, info->status, 2); if (ret) { dev_err(info->dev, "failed to read MUIC register\n"); mutex_unlock(&info->mutex); return; } if (info->irq_adc) {