| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Chanwoo Choi | 3865 | 94.61% | 27 | 54.00% |
| Krzysztof Kozlowski | 84 | 2.06% | 8 | 16.00% |
| Marek Szyprowski | 70 | 1.71% | 1 | 2.00% |
| Sachin Kamat | 26 | 0.64% | 7 | 14.00% |
| Robert Baldyga | 20 | 0.49% | 2 | 4.00% |
| Jaewon Kim | 8 | 0.20% | 1 | 2.00% |
| Sangjung Woo | 6 | 0.15% | 1 | 2.00% |
| Srikant Ritolia | 2 | 0.05% | 1 | 2.00% |
| Jonghwa Lee | 2 | 0.05% | 1 | 2.00% |
| Andrzej Hajda | 2 | 0.05% | 1 | 2.00% |
| Total | 4085 | 50 |
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// 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/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; 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); 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; 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 -ENOMEM; } 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 int max77693_muic_remove(struct platform_device *pdev) { struct max77693_muic_info *info = platform_get_drvdata(pdev); cancel_work_sync(&info->irq_work); input_unregister_device(info->dock); return 0; } static struct platform_driver max77693_muic_driver = { .driver = { .name = DEV_NAME, }, .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");
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